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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * NVIDIA Tegra xHCI host controller driver
4 *
5 * Copyright (c) 2014-2020, NVIDIA CORPORATION. All rights reserved.
6 * Copyright (C) 2014 Google, Inc.
7 */
8
9#include <linux/clk.h>
10#include <linux/delay.h>
11#include <linux/dma-mapping.h>
12#include <linux/firmware.h>
13#include <linux/interrupt.h>
14#include <linux/iopoll.h>
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/of.h>
18#include <linux/of_irq.h>
19#include <linux/phy/phy.h>
20#include <linux/phy/tegra/xusb.h>
21#include <linux/platform_device.h>
22#include <linux/usb/ch9.h>
23#include <linux/pm.h>
24#include <linux/pm_domain.h>
25#include <linux/pm_runtime.h>
26#include <linux/regulator/consumer.h>
27#include <linux/reset.h>
28#include <linux/slab.h>
29#include <linux/usb/otg.h>
30#include <linux/usb/phy.h>
31#include <linux/usb/role.h>
32#include <soc/tegra/pmc.h>
33
34#include "xhci.h"
35
36#define TEGRA_XHCI_SS_HIGH_SPEED 120000000
37#define TEGRA_XHCI_SS_LOW_SPEED 12000000
38
39/* FPCI CFG registers */
40#define XUSB_CFG_1 0x004
41#define XUSB_IO_SPACE_EN BIT(0)
42#define XUSB_MEM_SPACE_EN BIT(1)
43#define XUSB_BUS_MASTER_EN BIT(2)
44#define XUSB_CFG_4 0x010
45#define XUSB_BASE_ADDR_SHIFT 15
46#define XUSB_BASE_ADDR_MASK 0x1ffff
47#define XUSB_CFG_7 0x01c
48#define XUSB_BASE2_ADDR_SHIFT 16
49#define XUSB_BASE2_ADDR_MASK 0xffff
50#define XUSB_CFG_16 0x040
51#define XUSB_CFG_24 0x060
52#define XUSB_CFG_AXI_CFG 0x0f8
53#define XUSB_CFG_ARU_C11_CSBRANGE 0x41c
54#define XUSB_CFG_ARU_CONTEXT 0x43c
55#define XUSB_CFG_ARU_CONTEXT_HS_PLS 0x478
56#define XUSB_CFG_ARU_CONTEXT_FS_PLS 0x47c
57#define XUSB_CFG_ARU_CONTEXT_HSFS_SPEED 0x480
58#define XUSB_CFG_ARU_CONTEXT_HSFS_PP 0x484
59#define XUSB_CFG_CSB_BASE_ADDR 0x800
60
61/* FPCI mailbox registers */
62/* XUSB_CFG_ARU_MBOX_CMD */
63#define MBOX_DEST_FALC BIT(27)
64#define MBOX_DEST_PME BIT(28)
65#define MBOX_DEST_SMI BIT(29)
66#define MBOX_DEST_XHCI BIT(30)
67#define MBOX_INT_EN BIT(31)
68/* XUSB_CFG_ARU_MBOX_DATA_IN and XUSB_CFG_ARU_MBOX_DATA_OUT */
69#define CMD_DATA_SHIFT 0
70#define CMD_DATA_MASK 0xffffff
71#define CMD_TYPE_SHIFT 24
72#define CMD_TYPE_MASK 0xff
73/* XUSB_CFG_ARU_MBOX_OWNER */
74#define MBOX_OWNER_NONE 0
75#define MBOX_OWNER_FW 1
76#define MBOX_OWNER_SW 2
77#define XUSB_CFG_ARU_SMI_INTR 0x428
78#define MBOX_SMI_INTR_FW_HANG BIT(1)
79#define MBOX_SMI_INTR_EN BIT(3)
80
81/* BAR2 registers */
82#define XUSB_BAR2_ARU_MBOX_CMD 0x004
83#define XUSB_BAR2_ARU_MBOX_DATA_IN 0x008
84#define XUSB_BAR2_ARU_MBOX_DATA_OUT 0x00c
85#define XUSB_BAR2_ARU_MBOX_OWNER 0x010
86#define XUSB_BAR2_ARU_SMI_INTR 0x014
87#define XUSB_BAR2_ARU_SMI_ARU_FW_SCRATCH_DATA0 0x01c
88#define XUSB_BAR2_ARU_IFRDMA_CFG0 0x0e0
89#define XUSB_BAR2_ARU_IFRDMA_CFG1 0x0e4
90#define XUSB_BAR2_ARU_IFRDMA_STREAMID_FIELD 0x0e8
91#define XUSB_BAR2_ARU_C11_CSBRANGE 0x9c
92#define XUSB_BAR2_ARU_FW_SCRATCH 0x1000
93#define XUSB_BAR2_CSB_BASE_ADDR 0x2000
94
95/* IPFS registers */
96#define IPFS_XUSB_HOST_MSI_BAR_SZ_0 0x0c0
97#define IPFS_XUSB_HOST_MSI_AXI_BAR_ST_0 0x0c4
98#define IPFS_XUSB_HOST_MSI_FPCI_BAR_ST_0 0x0c8
99#define IPFS_XUSB_HOST_MSI_VEC0_0 0x100
100#define IPFS_XUSB_HOST_MSI_EN_VEC0_0 0x140
101#define IPFS_XUSB_HOST_CONFIGURATION_0 0x180
102#define IPFS_EN_FPCI BIT(0)
103#define IPFS_XUSB_HOST_FPCI_ERROR_MASKS_0 0x184
104#define IPFS_XUSB_HOST_INTR_MASK_0 0x188
105#define IPFS_IP_INT_MASK BIT(16)
106#define IPFS_XUSB_HOST_INTR_ENABLE_0 0x198
107#define IPFS_XUSB_HOST_UFPCI_CONFIG_0 0x19c
108#define IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0 0x1bc
109#define IPFS_XUSB_HOST_MCCIF_FIFOCTRL_0 0x1dc
110
111#define CSB_PAGE_SELECT_MASK 0x7fffff
112#define CSB_PAGE_SELECT_SHIFT 9
113#define CSB_PAGE_OFFSET_MASK 0x1ff
114#define CSB_PAGE_SELECT(addr) ((addr) >> (CSB_PAGE_SELECT_SHIFT) & \
115 CSB_PAGE_SELECT_MASK)
116#define CSB_PAGE_OFFSET(addr) ((addr) & CSB_PAGE_OFFSET_MASK)
117
118/* Falcon CSB registers */
119#define XUSB_FALC_CPUCTL 0x100
120#define CPUCTL_STARTCPU BIT(1)
121#define CPUCTL_STATE_HALTED BIT(4)
122#define CPUCTL_STATE_STOPPED BIT(5)
123#define XUSB_FALC_BOOTVEC 0x104
124#define XUSB_FALC_DMACTL 0x10c
125#define XUSB_FALC_IMFILLRNG1 0x154
126#define IMFILLRNG1_TAG_MASK 0xffff
127#define IMFILLRNG1_TAG_LO_SHIFT 0
128#define IMFILLRNG1_TAG_HI_SHIFT 16
129#define XUSB_FALC_IMFILLCTL 0x158
130
131/* CSB ARU registers */
132#define XUSB_CSB_ARU_SCRATCH0 0x100100
133
134/* MP CSB registers */
135#define XUSB_CSB_MP_ILOAD_ATTR 0x101a00
136#define XUSB_CSB_MP_ILOAD_BASE_LO 0x101a04
137#define XUSB_CSB_MP_ILOAD_BASE_HI 0x101a08
138#define XUSB_CSB_MP_L2IMEMOP_SIZE 0x101a10
139#define L2IMEMOP_SIZE_SRC_OFFSET_SHIFT 8
140#define L2IMEMOP_SIZE_SRC_OFFSET_MASK 0x3ff
141#define L2IMEMOP_SIZE_SRC_COUNT_SHIFT 24
142#define L2IMEMOP_SIZE_SRC_COUNT_MASK 0xff
143#define XUSB_CSB_MP_L2IMEMOP_TRIG 0x101a14
144#define L2IMEMOP_ACTION_SHIFT 24
145#define L2IMEMOP_INVALIDATE_ALL (0x40 << L2IMEMOP_ACTION_SHIFT)
146#define L2IMEMOP_LOAD_LOCKED_RESULT (0x11 << L2IMEMOP_ACTION_SHIFT)
147#define XUSB_CSB_MEMPOOL_L2IMEMOP_RESULT 0x101a18
148#define L2IMEMOP_RESULT_VLD BIT(31)
149#define XUSB_CSB_MP_APMAP 0x10181c
150#define APMAP_BOOTPATH BIT(31)
151
152#define IMEM_BLOCK_SIZE 256
153
154#define FW_IOCTL_TYPE_SHIFT 24
155#define FW_IOCTL_CFGTBL_READ 17
156
157struct tegra_xusb_fw_header {
158 __le32 boot_loadaddr_in_imem;
159 __le32 boot_codedfi_offset;
160 __le32 boot_codetag;
161 __le32 boot_codesize;
162 __le32 phys_memaddr;
163 __le16 reqphys_memsize;
164 __le16 alloc_phys_memsize;
165 __le32 rodata_img_offset;
166 __le32 rodata_section_start;
167 __le32 rodata_section_end;
168 __le32 main_fnaddr;
169 __le32 fwimg_cksum;
170 __le32 fwimg_created_time;
171 __le32 imem_resident_start;
172 __le32 imem_resident_end;
173 __le32 idirect_start;
174 __le32 idirect_end;
175 __le32 l2_imem_start;
176 __le32 l2_imem_end;
177 __le32 version_id;
178 u8 init_ddirect;
179 u8 reserved[3];
180 __le32 phys_addr_log_buffer;
181 __le32 total_log_entries;
182 __le32 dequeue_ptr;
183 __le32 dummy_var[2];
184 __le32 fwimg_len;
185 u8 magic[8];
186 __le32 ss_low_power_entry_timeout;
187 u8 num_hsic_port;
188 u8 padding[139]; /* Pad to 256 bytes */
189};
190
191struct tegra_xusb_phy_type {
192 const char *name;
193 unsigned int num;
194};
195
196struct tegra_xusb_mbox_regs {
197 u16 cmd;
198 u16 data_in;
199 u16 data_out;
200 u16 owner;
201 u16 smi_intr;
202};
203
204struct tegra_xusb_context_soc {
205 struct {
206 const unsigned int *offsets;
207 unsigned int num_offsets;
208 } ipfs;
209
210 struct {
211 const unsigned int *offsets;
212 unsigned int num_offsets;
213 } fpci;
214};
215
216struct tegra_xusb;
217struct tegra_xusb_soc_ops {
218 u32 (*mbox_reg_readl)(struct tegra_xusb *tegra, unsigned int offset);
219 void (*mbox_reg_writel)(struct tegra_xusb *tegra, u32 value, unsigned int offset);
220 u32 (*csb_reg_readl)(struct tegra_xusb *tegra, unsigned int offset);
221 void (*csb_reg_writel)(struct tegra_xusb *tegra, u32 value, unsigned int offset);
222};
223
224struct tegra_xusb_soc {
225 const char *firmware;
226 const char * const *supply_names;
227 unsigned int num_supplies;
228 const struct tegra_xusb_phy_type *phy_types;
229 unsigned int num_types;
230 const struct tegra_xusb_context_soc *context;
231
232 struct {
233 struct {
234 unsigned int offset;
235 unsigned int count;
236 } usb2, ulpi, hsic, usb3;
237 } ports;
238
239 struct tegra_xusb_mbox_regs mbox;
240 const struct tegra_xusb_soc_ops *ops;
241
242 bool scale_ss_clock;
243 bool has_ipfs;
244 bool lpm_support;
245 bool otg_reset_sspi;
246
247 bool has_bar2;
248};
249
250struct tegra_xusb_context {
251 u32 *ipfs;
252 u32 *fpci;
253};
254
255struct tegra_xusb {
256 struct device *dev;
257 void __iomem *regs;
258 struct usb_hcd *hcd;
259
260 struct mutex lock;
261
262 int xhci_irq;
263 int mbox_irq;
264 int padctl_irq;
265
266 void __iomem *ipfs_base;
267 void __iomem *fpci_base;
268 void __iomem *bar2_base;
269 struct resource *bar2;
270
271 const struct tegra_xusb_soc *soc;
272
273 struct regulator_bulk_data *supplies;
274
275 struct tegra_xusb_padctl *padctl;
276
277 struct clk *host_clk;
278 struct clk *falcon_clk;
279 struct clk *ss_clk;
280 struct clk *ss_src_clk;
281 struct clk *hs_src_clk;
282 struct clk *fs_src_clk;
283 struct clk *pll_u_480m;
284 struct clk *clk_m;
285 struct clk *pll_e;
286
287 struct reset_control *host_rst;
288 struct reset_control *ss_rst;
289
290 struct device *genpd_dev_host;
291 struct device *genpd_dev_ss;
292 bool use_genpd;
293
294 struct phy **phys;
295 unsigned int num_phys;
296
297 struct usb_phy **usbphy;
298 unsigned int num_usb_phys;
299 int otg_usb2_port;
300 int otg_usb3_port;
301 bool host_mode;
302 struct notifier_block id_nb;
303 struct work_struct id_work;
304
305 /* Firmware loading related */
306 struct {
307 size_t size;
308 void *virt;
309 dma_addr_t phys;
310 } fw;
311
312 bool suspended;
313 struct tegra_xusb_context context;
314 u8 lp0_utmi_pad_mask;
315};
316
317static struct hc_driver __read_mostly tegra_xhci_hc_driver;
318
319static inline u32 fpci_readl(struct tegra_xusb *tegra, unsigned int offset)
320{
321 return readl(tegra->fpci_base + offset);
322}
323
324static inline void fpci_writel(struct tegra_xusb *tegra, u32 value,
325 unsigned int offset)
326{
327 writel(value, tegra->fpci_base + offset);
328}
329
330static inline u32 ipfs_readl(struct tegra_xusb *tegra, unsigned int offset)
331{
332 return readl(tegra->ipfs_base + offset);
333}
334
335static inline void ipfs_writel(struct tegra_xusb *tegra, u32 value,
336 unsigned int offset)
337{
338 writel(value, tegra->ipfs_base + offset);
339}
340
341static inline u32 bar2_readl(struct tegra_xusb *tegra, unsigned int offset)
342{
343 return readl(tegra->bar2_base + offset);
344}
345
346static inline void bar2_writel(struct tegra_xusb *tegra, u32 value,
347 unsigned int offset)
348{
349 writel(value, tegra->bar2_base + offset);
350}
351
352static u32 csb_readl(struct tegra_xusb *tegra, unsigned int offset)
353{
354 const struct tegra_xusb_soc_ops *ops = tegra->soc->ops;
355
356 return ops->csb_reg_readl(tegra, offset);
357}
358
359static void csb_writel(struct tegra_xusb *tegra, u32 value,
360 unsigned int offset)
361{
362 const struct tegra_xusb_soc_ops *ops = tegra->soc->ops;
363
364 ops->csb_reg_writel(tegra, value, offset);
365}
366
367static u32 fpci_csb_readl(struct tegra_xusb *tegra, unsigned int offset)
368{
369 u32 page = CSB_PAGE_SELECT(offset);
370 u32 ofs = CSB_PAGE_OFFSET(offset);
371
372 fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE);
373
374 return fpci_readl(tegra, XUSB_CFG_CSB_BASE_ADDR + ofs);
375}
376
377static void fpci_csb_writel(struct tegra_xusb *tegra, u32 value,
378 unsigned int offset)
379{
380 u32 page = CSB_PAGE_SELECT(offset);
381 u32 ofs = CSB_PAGE_OFFSET(offset);
382
383 fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE);
384 fpci_writel(tegra, value, XUSB_CFG_CSB_BASE_ADDR + ofs);
385}
386
387static u32 bar2_csb_readl(struct tegra_xusb *tegra, unsigned int offset)
388{
389 u32 page = CSB_PAGE_SELECT(offset);
390 u32 ofs = CSB_PAGE_OFFSET(offset);
391
392 bar2_writel(tegra, page, XUSB_BAR2_ARU_C11_CSBRANGE);
393
394 return bar2_readl(tegra, XUSB_BAR2_CSB_BASE_ADDR + ofs);
395}
396
397static void bar2_csb_writel(struct tegra_xusb *tegra, u32 value,
398 unsigned int offset)
399{
400 u32 page = CSB_PAGE_SELECT(offset);
401 u32 ofs = CSB_PAGE_OFFSET(offset);
402
403 bar2_writel(tegra, page, XUSB_BAR2_ARU_C11_CSBRANGE);
404 bar2_writel(tegra, value, XUSB_BAR2_CSB_BASE_ADDR + ofs);
405}
406
407static int tegra_xusb_set_ss_clk(struct tegra_xusb *tegra,
408 unsigned long rate)
409{
410 unsigned long new_parent_rate, old_parent_rate;
411 struct clk *clk = tegra->ss_src_clk;
412 unsigned int div;
413 int err;
414
415 if (clk_get_rate(clk) == rate)
416 return 0;
417
418 switch (rate) {
419 case TEGRA_XHCI_SS_HIGH_SPEED:
420 /*
421 * Reparent to PLLU_480M. Set divider first to avoid
422 * overclocking.
423 */
424 old_parent_rate = clk_get_rate(clk_get_parent(clk));
425 new_parent_rate = clk_get_rate(tegra->pll_u_480m);
426 div = new_parent_rate / rate;
427
428 err = clk_set_rate(clk, old_parent_rate / div);
429 if (err)
430 return err;
431
432 err = clk_set_parent(clk, tegra->pll_u_480m);
433 if (err)
434 return err;
435
436 /*
437 * The rate should already be correct, but set it again just
438 * to be sure.
439 */
440 err = clk_set_rate(clk, rate);
441 if (err)
442 return err;
443
444 break;
445
446 case TEGRA_XHCI_SS_LOW_SPEED:
447 /* Reparent to CLK_M */
448 err = clk_set_parent(clk, tegra->clk_m);
449 if (err)
450 return err;
451
452 err = clk_set_rate(clk, rate);
453 if (err)
454 return err;
455
456 break;
457
458 default:
459 dev_err(tegra->dev, "Invalid SS rate: %lu Hz\n", rate);
460 return -EINVAL;
461 }
462
463 if (clk_get_rate(clk) != rate) {
464 dev_err(tegra->dev, "SS clock doesn't match requested rate\n");
465 return -EINVAL;
466 }
467
468 return 0;
469}
470
471static unsigned long extract_field(u32 value, unsigned int start,
472 unsigned int count)
473{
474 return (value >> start) & ((1 << count) - 1);
475}
476
477/* Command requests from the firmware */
478enum tegra_xusb_mbox_cmd {
479 MBOX_CMD_MSG_ENABLED = 1,
480 MBOX_CMD_INC_FALC_CLOCK,
481 MBOX_CMD_DEC_FALC_CLOCK,
482 MBOX_CMD_INC_SSPI_CLOCK,
483 MBOX_CMD_DEC_SSPI_CLOCK,
484 MBOX_CMD_SET_BW, /* no ACK/NAK required */
485 MBOX_CMD_SET_SS_PWR_GATING,
486 MBOX_CMD_SET_SS_PWR_UNGATING,
487 MBOX_CMD_SAVE_DFE_CTLE_CTX,
488 MBOX_CMD_AIRPLANE_MODE_ENABLED, /* unused */
489 MBOX_CMD_AIRPLANE_MODE_DISABLED, /* unused */
490 MBOX_CMD_START_HSIC_IDLE,
491 MBOX_CMD_STOP_HSIC_IDLE,
492 MBOX_CMD_DBC_WAKE_STACK, /* unused */
493 MBOX_CMD_HSIC_PRETEND_CONNECT,
494 MBOX_CMD_RESET_SSPI,
495 MBOX_CMD_DISABLE_SS_LFPS_DETECTION,
496 MBOX_CMD_ENABLE_SS_LFPS_DETECTION,
497
498 MBOX_CMD_MAX,
499
500 /* Response message to above commands */
501 MBOX_CMD_ACK = 128,
502 MBOX_CMD_NAK
503};
504
505struct tegra_xusb_mbox_msg {
506 u32 cmd;
507 u32 data;
508};
509
510static inline u32 tegra_xusb_mbox_pack(const struct tegra_xusb_mbox_msg *msg)
511{
512 return (msg->cmd & CMD_TYPE_MASK) << CMD_TYPE_SHIFT |
513 (msg->data & CMD_DATA_MASK) << CMD_DATA_SHIFT;
514}
515static inline void tegra_xusb_mbox_unpack(struct tegra_xusb_mbox_msg *msg,
516 u32 value)
517{
518 msg->cmd = (value >> CMD_TYPE_SHIFT) & CMD_TYPE_MASK;
519 msg->data = (value >> CMD_DATA_SHIFT) & CMD_DATA_MASK;
520}
521
522static bool tegra_xusb_mbox_cmd_requires_ack(enum tegra_xusb_mbox_cmd cmd)
523{
524 switch (cmd) {
525 case MBOX_CMD_SET_BW:
526 case MBOX_CMD_ACK:
527 case MBOX_CMD_NAK:
528 return false;
529
530 default:
531 return true;
532 }
533}
534
535static int tegra_xusb_mbox_send(struct tegra_xusb *tegra,
536 const struct tegra_xusb_mbox_msg *msg)
537{
538 const struct tegra_xusb_soc_ops *ops = tegra->soc->ops;
539 bool wait_for_idle = false;
540 u32 value;
541
542 /*
543 * Acquire the mailbox. The firmware still owns the mailbox for
544 * ACK/NAK messages.
545 */
546 if (!(msg->cmd == MBOX_CMD_ACK || msg->cmd == MBOX_CMD_NAK)) {
547 value = ops->mbox_reg_readl(tegra, tegra->soc->mbox.owner);
548 if (value != MBOX_OWNER_NONE) {
549 dev_err(tegra->dev, "mailbox is busy\n");
550 return -EBUSY;
551 }
552
553 ops->mbox_reg_writel(tegra, MBOX_OWNER_SW, tegra->soc->mbox.owner);
554
555 value = ops->mbox_reg_readl(tegra, tegra->soc->mbox.owner);
556 if (value != MBOX_OWNER_SW) {
557 dev_err(tegra->dev, "failed to acquire mailbox\n");
558 return -EBUSY;
559 }
560
561 wait_for_idle = true;
562 }
563
564 value = tegra_xusb_mbox_pack(msg);
565 ops->mbox_reg_writel(tegra, value, tegra->soc->mbox.data_in);
566
567 value = ops->mbox_reg_readl(tegra, tegra->soc->mbox.cmd);
568 value |= MBOX_INT_EN | MBOX_DEST_FALC;
569 ops->mbox_reg_writel(tegra, value, tegra->soc->mbox.cmd);
570
571 if (wait_for_idle) {
572 unsigned long timeout = jiffies + msecs_to_jiffies(250);
573
574 while (time_before(jiffies, timeout)) {
575 value = ops->mbox_reg_readl(tegra, tegra->soc->mbox.owner);
576 if (value == MBOX_OWNER_NONE)
577 break;
578
579 usleep_range(10, 20);
580 }
581
582 if (time_after(jiffies, timeout))
583 value = ops->mbox_reg_readl(tegra, tegra->soc->mbox.owner);
584
585 if (value != MBOX_OWNER_NONE)
586 return -ETIMEDOUT;
587 }
588
589 return 0;
590}
591
592static irqreturn_t tegra_xusb_mbox_irq(int irq, void *data)
593{
594 struct tegra_xusb *tegra = data;
595 const struct tegra_xusb_soc_ops *ops = tegra->soc->ops;
596 u32 value;
597
598 /* clear mailbox interrupts */
599 value = ops->mbox_reg_readl(tegra, tegra->soc->mbox.smi_intr);
600 ops->mbox_reg_writel(tegra, value, tegra->soc->mbox.smi_intr);
601
602 if (value & MBOX_SMI_INTR_FW_HANG)
603 dev_err(tegra->dev, "controller firmware hang\n");
604
605 return IRQ_WAKE_THREAD;
606}
607
608static void tegra_xusb_mbox_handle(struct tegra_xusb *tegra,
609 const struct tegra_xusb_mbox_msg *msg)
610{
611 struct tegra_xusb_padctl *padctl = tegra->padctl;
612 const struct tegra_xusb_soc *soc = tegra->soc;
613 struct device *dev = tegra->dev;
614 struct tegra_xusb_mbox_msg rsp;
615 unsigned long mask;
616 unsigned int port;
617 bool idle, enable;
618 int err = 0;
619
620 memset(&rsp, 0, sizeof(rsp));
621
622 switch (msg->cmd) {
623 case MBOX_CMD_INC_FALC_CLOCK:
624 case MBOX_CMD_DEC_FALC_CLOCK:
625 rsp.data = clk_get_rate(tegra->falcon_clk) / 1000;
626 if (rsp.data != msg->data)
627 rsp.cmd = MBOX_CMD_NAK;
628 else
629 rsp.cmd = MBOX_CMD_ACK;
630
631 break;
632
633 case MBOX_CMD_INC_SSPI_CLOCK:
634 case MBOX_CMD_DEC_SSPI_CLOCK:
635 if (tegra->soc->scale_ss_clock) {
636 err = tegra_xusb_set_ss_clk(tegra, msg->data * 1000);
637 if (err < 0)
638 rsp.cmd = MBOX_CMD_NAK;
639 else
640 rsp.cmd = MBOX_CMD_ACK;
641
642 rsp.data = clk_get_rate(tegra->ss_src_clk) / 1000;
643 } else {
644 rsp.cmd = MBOX_CMD_ACK;
645 rsp.data = msg->data;
646 }
647
648 break;
649
650 case MBOX_CMD_SET_BW:
651 /*
652 * TODO: Request bandwidth once EMC scaling is supported.
653 * Ignore for now since ACK/NAK is not required for SET_BW
654 * messages.
655 */
656 break;
657
658 case MBOX_CMD_SAVE_DFE_CTLE_CTX:
659 err = tegra_xusb_padctl_usb3_save_context(padctl, msg->data);
660 if (err < 0) {
661 dev_err(dev, "failed to save context for USB3#%u: %d\n",
662 msg->data, err);
663 rsp.cmd = MBOX_CMD_NAK;
664 } else {
665 rsp.cmd = MBOX_CMD_ACK;
666 }
667
668 rsp.data = msg->data;
669 break;
670
671 case MBOX_CMD_START_HSIC_IDLE:
672 case MBOX_CMD_STOP_HSIC_IDLE:
673 if (msg->cmd == MBOX_CMD_STOP_HSIC_IDLE)
674 idle = false;
675 else
676 idle = true;
677
678 mask = extract_field(msg->data, 1 + soc->ports.hsic.offset,
679 soc->ports.hsic.count);
680
681 for_each_set_bit(port, &mask, 32) {
682 err = tegra_xusb_padctl_hsic_set_idle(padctl, port,
683 idle);
684 if (err < 0)
685 break;
686 }
687
688 if (err < 0) {
689 dev_err(dev, "failed to set HSIC#%u %s: %d\n", port,
690 idle ? "idle" : "busy", err);
691 rsp.cmd = MBOX_CMD_NAK;
692 } else {
693 rsp.cmd = MBOX_CMD_ACK;
694 }
695
696 rsp.data = msg->data;
697 break;
698
699 case MBOX_CMD_DISABLE_SS_LFPS_DETECTION:
700 case MBOX_CMD_ENABLE_SS_LFPS_DETECTION:
701 if (msg->cmd == MBOX_CMD_DISABLE_SS_LFPS_DETECTION)
702 enable = false;
703 else
704 enable = true;
705
706 mask = extract_field(msg->data, 1 + soc->ports.usb3.offset,
707 soc->ports.usb3.count);
708
709 for_each_set_bit(port, &mask, soc->ports.usb3.count) {
710 err = tegra_xusb_padctl_usb3_set_lfps_detect(padctl,
711 port,
712 enable);
713 if (err < 0)
714 break;
715
716 /*
717 * wait 500us for LFPS detector to be disabled before
718 * sending ACK
719 */
720 if (!enable)
721 usleep_range(500, 1000);
722 }
723
724 if (err < 0) {
725 dev_err(dev,
726 "failed to %s LFPS detection on USB3#%u: %d\n",
727 enable ? "enable" : "disable", port, err);
728 rsp.cmd = MBOX_CMD_NAK;
729 } else {
730 rsp.cmd = MBOX_CMD_ACK;
731 }
732
733 rsp.data = msg->data;
734 break;
735
736 default:
737 dev_warn(dev, "unknown message: %#x\n", msg->cmd);
738 break;
739 }
740
741 if (rsp.cmd) {
742 const char *cmd = (rsp.cmd == MBOX_CMD_ACK) ? "ACK" : "NAK";
743
744 err = tegra_xusb_mbox_send(tegra, &rsp);
745 if (err < 0)
746 dev_err(dev, "failed to send %s: %d\n", cmd, err);
747 }
748}
749
750static irqreturn_t tegra_xusb_mbox_thread(int irq, void *data)
751{
752 struct tegra_xusb *tegra = data;
753 const struct tegra_xusb_soc_ops *ops = tegra->soc->ops;
754 struct tegra_xusb_mbox_msg msg;
755 u32 value;
756
757 mutex_lock(&tegra->lock);
758
759 if (pm_runtime_suspended(tegra->dev) || tegra->suspended)
760 goto out;
761
762 value = ops->mbox_reg_readl(tegra, tegra->soc->mbox.data_out);
763 tegra_xusb_mbox_unpack(&msg, value);
764
765 value = ops->mbox_reg_readl(tegra, tegra->soc->mbox.cmd);
766 value &= ~MBOX_DEST_SMI;
767 ops->mbox_reg_writel(tegra, value, tegra->soc->mbox.cmd);
768
769 /* clear mailbox owner if no ACK/NAK is required */
770 if (!tegra_xusb_mbox_cmd_requires_ack(msg.cmd))
771 ops->mbox_reg_writel(tegra, MBOX_OWNER_NONE, tegra->soc->mbox.owner);
772
773 tegra_xusb_mbox_handle(tegra, &msg);
774
775out:
776 mutex_unlock(&tegra->lock);
777 return IRQ_HANDLED;
778}
779
780static void tegra_xusb_config(struct tegra_xusb *tegra)
781{
782 u32 regs = tegra->hcd->rsrc_start;
783 u32 value;
784
785 if (tegra->soc->has_ipfs) {
786 value = ipfs_readl(tegra, IPFS_XUSB_HOST_CONFIGURATION_0);
787 value |= IPFS_EN_FPCI;
788 ipfs_writel(tegra, value, IPFS_XUSB_HOST_CONFIGURATION_0);
789
790 usleep_range(10, 20);
791 }
792
793 /* Program BAR0 space */
794 value = fpci_readl(tegra, XUSB_CFG_4);
795 value &= ~(XUSB_BASE_ADDR_MASK << XUSB_BASE_ADDR_SHIFT);
796 value |= regs & (XUSB_BASE_ADDR_MASK << XUSB_BASE_ADDR_SHIFT);
797 fpci_writel(tegra, value, XUSB_CFG_4);
798
799 /* Program BAR2 space */
800 if (tegra->bar2) {
801 value = fpci_readl(tegra, XUSB_CFG_7);
802 value &= ~(XUSB_BASE2_ADDR_MASK << XUSB_BASE2_ADDR_SHIFT);
803 value |= tegra->bar2->start &
804 (XUSB_BASE2_ADDR_MASK << XUSB_BASE2_ADDR_SHIFT);
805 fpci_writel(tegra, value, XUSB_CFG_7);
806 }
807
808 usleep_range(100, 200);
809
810 /* Enable bus master */
811 value = fpci_readl(tegra, XUSB_CFG_1);
812 value |= XUSB_IO_SPACE_EN | XUSB_MEM_SPACE_EN | XUSB_BUS_MASTER_EN;
813 fpci_writel(tegra, value, XUSB_CFG_1);
814
815 if (tegra->soc->has_ipfs) {
816 /* Enable interrupt assertion */
817 value = ipfs_readl(tegra, IPFS_XUSB_HOST_INTR_MASK_0);
818 value |= IPFS_IP_INT_MASK;
819 ipfs_writel(tegra, value, IPFS_XUSB_HOST_INTR_MASK_0);
820
821 /* Set hysteresis */
822 ipfs_writel(tegra, 0x80, IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0);
823 }
824}
825
826static int tegra_xusb_clk_enable(struct tegra_xusb *tegra)
827{
828 int err;
829
830 err = clk_prepare_enable(tegra->pll_e);
831 if (err < 0)
832 return err;
833
834 err = clk_prepare_enable(tegra->host_clk);
835 if (err < 0)
836 goto disable_plle;
837
838 err = clk_prepare_enable(tegra->ss_clk);
839 if (err < 0)
840 goto disable_host;
841
842 err = clk_prepare_enable(tegra->falcon_clk);
843 if (err < 0)
844 goto disable_ss;
845
846 err = clk_prepare_enable(tegra->fs_src_clk);
847 if (err < 0)
848 goto disable_falc;
849
850 err = clk_prepare_enable(tegra->hs_src_clk);
851 if (err < 0)
852 goto disable_fs_src;
853
854 if (tegra->soc->scale_ss_clock) {
855 err = tegra_xusb_set_ss_clk(tegra, TEGRA_XHCI_SS_HIGH_SPEED);
856 if (err < 0)
857 goto disable_hs_src;
858 }
859
860 return 0;
861
862disable_hs_src:
863 clk_disable_unprepare(tegra->hs_src_clk);
864disable_fs_src:
865 clk_disable_unprepare(tegra->fs_src_clk);
866disable_falc:
867 clk_disable_unprepare(tegra->falcon_clk);
868disable_ss:
869 clk_disable_unprepare(tegra->ss_clk);
870disable_host:
871 clk_disable_unprepare(tegra->host_clk);
872disable_plle:
873 clk_disable_unprepare(tegra->pll_e);
874 return err;
875}
876
877static void tegra_xusb_clk_disable(struct tegra_xusb *tegra)
878{
879 clk_disable_unprepare(tegra->pll_e);
880 clk_disable_unprepare(tegra->host_clk);
881 clk_disable_unprepare(tegra->ss_clk);
882 clk_disable_unprepare(tegra->falcon_clk);
883 clk_disable_unprepare(tegra->fs_src_clk);
884 clk_disable_unprepare(tegra->hs_src_clk);
885}
886
887static int tegra_xusb_phy_enable(struct tegra_xusb *tegra)
888{
889 unsigned int i;
890 int err;
891
892 for (i = 0; i < tegra->num_phys; i++) {
893 err = phy_init(tegra->phys[i]);
894 if (err)
895 goto disable_phy;
896
897 err = phy_power_on(tegra->phys[i]);
898 if (err) {
899 phy_exit(tegra->phys[i]);
900 goto disable_phy;
901 }
902 }
903
904 return 0;
905
906disable_phy:
907 while (i--) {
908 phy_power_off(tegra->phys[i]);
909 phy_exit(tegra->phys[i]);
910 }
911
912 return err;
913}
914
915static void tegra_xusb_phy_disable(struct tegra_xusb *tegra)
916{
917 unsigned int i;
918
919 for (i = 0; i < tegra->num_phys; i++) {
920 phy_power_off(tegra->phys[i]);
921 phy_exit(tegra->phys[i]);
922 }
923}
924
925#ifdef CONFIG_PM_SLEEP
926static int tegra_xusb_init_context(struct tegra_xusb *tegra)
927{
928 const struct tegra_xusb_context_soc *soc = tegra->soc->context;
929
930 tegra->context.ipfs = devm_kcalloc(tegra->dev, soc->ipfs.num_offsets,
931 sizeof(u32), GFP_KERNEL);
932 if (!tegra->context.ipfs)
933 return -ENOMEM;
934
935 tegra->context.fpci = devm_kcalloc(tegra->dev, soc->fpci.num_offsets,
936 sizeof(u32), GFP_KERNEL);
937 if (!tegra->context.fpci)
938 return -ENOMEM;
939
940 return 0;
941}
942#else
943static inline int tegra_xusb_init_context(struct tegra_xusb *tegra)
944{
945 return 0;
946}
947#endif
948
949static int tegra_xusb_request_firmware(struct tegra_xusb *tegra)
950{
951 struct tegra_xusb_fw_header *header;
952 const struct firmware *fw;
953 int err;
954
955 err = request_firmware(&fw, tegra->soc->firmware, tegra->dev);
956 if (err < 0) {
957 dev_err(tegra->dev, "failed to request firmware: %d\n", err);
958 return err;
959 }
960
961 /* Load Falcon controller with its firmware. */
962 header = (struct tegra_xusb_fw_header *)fw->data;
963 tegra->fw.size = le32_to_cpu(header->fwimg_len);
964
965 tegra->fw.virt = dma_alloc_coherent(tegra->dev, tegra->fw.size,
966 &tegra->fw.phys, GFP_KERNEL);
967 if (!tegra->fw.virt) {
968 dev_err(tegra->dev, "failed to allocate memory for firmware\n");
969 release_firmware(fw);
970 return -ENOMEM;
971 }
972
973 header = (struct tegra_xusb_fw_header *)tegra->fw.virt;
974 memcpy(tegra->fw.virt, fw->data, tegra->fw.size);
975 release_firmware(fw);
976
977 return 0;
978}
979
980static int tegra_xusb_wait_for_falcon(struct tegra_xusb *tegra)
981{
982 struct xhci_cap_regs __iomem *cap_regs;
983 struct xhci_op_regs __iomem *op_regs;
984 int ret;
985 u32 value;
986
987 cap_regs = tegra->regs;
988 op_regs = tegra->regs + HC_LENGTH(readl(&cap_regs->hc_capbase));
989
990 ret = readl_poll_timeout(&op_regs->status, value, !(value & STS_CNR), 1000, 200000);
991
992 if (ret)
993 dev_err(tegra->dev, "XHCI Controller not ready. Falcon state: 0x%x\n",
994 csb_readl(tegra, XUSB_FALC_CPUCTL));
995
996 return ret;
997}
998
999static int tegra_xusb_load_firmware_rom(struct tegra_xusb *tegra)
1000{
1001 unsigned int code_tag_blocks, code_size_blocks, code_blocks;
1002 struct tegra_xusb_fw_header *header;
1003 struct device *dev = tegra->dev;
1004 time64_t timestamp;
1005 u64 address;
1006 u32 value;
1007 int err;
1008
1009 header = (struct tegra_xusb_fw_header *)tegra->fw.virt;
1010
1011 if (csb_readl(tegra, XUSB_CSB_MP_ILOAD_BASE_LO) != 0) {
1012 dev_info(dev, "Firmware already loaded, Falcon state %#x\n",
1013 csb_readl(tegra, XUSB_FALC_CPUCTL));
1014 return 0;
1015 }
1016
1017 /* Program the size of DFI into ILOAD_ATTR. */
1018 csb_writel(tegra, tegra->fw.size, XUSB_CSB_MP_ILOAD_ATTR);
1019
1020 /*
1021 * Boot code of the firmware reads the ILOAD_BASE registers
1022 * to get to the start of the DFI in system memory.
1023 */
1024 address = tegra->fw.phys + sizeof(*header);
1025 csb_writel(tegra, address >> 32, XUSB_CSB_MP_ILOAD_BASE_HI);
1026 csb_writel(tegra, address, XUSB_CSB_MP_ILOAD_BASE_LO);
1027
1028 /* Set BOOTPATH to 1 in APMAP. */
1029 csb_writel(tegra, APMAP_BOOTPATH, XUSB_CSB_MP_APMAP);
1030
1031 /* Invalidate L2IMEM. */
1032 csb_writel(tegra, L2IMEMOP_INVALIDATE_ALL, XUSB_CSB_MP_L2IMEMOP_TRIG);
1033
1034 /*
1035 * Initiate fetch of bootcode from system memory into L2IMEM.
1036 * Program bootcode location and size in system memory.
1037 */
1038 code_tag_blocks = DIV_ROUND_UP(le32_to_cpu(header->boot_codetag),
1039 IMEM_BLOCK_SIZE);
1040 code_size_blocks = DIV_ROUND_UP(le32_to_cpu(header->boot_codesize),
1041 IMEM_BLOCK_SIZE);
1042 code_blocks = code_tag_blocks + code_size_blocks;
1043
1044 value = ((code_tag_blocks & L2IMEMOP_SIZE_SRC_OFFSET_MASK) <<
1045 L2IMEMOP_SIZE_SRC_OFFSET_SHIFT) |
1046 ((code_size_blocks & L2IMEMOP_SIZE_SRC_COUNT_MASK) <<
1047 L2IMEMOP_SIZE_SRC_COUNT_SHIFT);
1048 csb_writel(tegra, value, XUSB_CSB_MP_L2IMEMOP_SIZE);
1049
1050 /* Trigger L2IMEM load operation. */
1051 csb_writel(tegra, L2IMEMOP_LOAD_LOCKED_RESULT,
1052 XUSB_CSB_MP_L2IMEMOP_TRIG);
1053
1054 /* Setup Falcon auto-fill. */
1055 csb_writel(tegra, code_size_blocks, XUSB_FALC_IMFILLCTL);
1056
1057 value = ((code_tag_blocks & IMFILLRNG1_TAG_MASK) <<
1058 IMFILLRNG1_TAG_LO_SHIFT) |
1059 ((code_blocks & IMFILLRNG1_TAG_MASK) <<
1060 IMFILLRNG1_TAG_HI_SHIFT);
1061 csb_writel(tegra, value, XUSB_FALC_IMFILLRNG1);
1062
1063 csb_writel(tegra, 0, XUSB_FALC_DMACTL);
1064
1065 /* wait for RESULT_VLD to get set */
1066#define tegra_csb_readl(offset) csb_readl(tegra, offset)
1067 err = readx_poll_timeout(tegra_csb_readl,
1068 XUSB_CSB_MEMPOOL_L2IMEMOP_RESULT, value,
1069 value & L2IMEMOP_RESULT_VLD, 100, 10000);
1070 if (err < 0) {
1071 dev_err(dev, "DMA controller not ready %#010x\n", value);
1072 return err;
1073 }
1074#undef tegra_csb_readl
1075
1076 csb_writel(tegra, le32_to_cpu(header->boot_codetag),
1077 XUSB_FALC_BOOTVEC);
1078
1079 /* Boot Falcon CPU and wait for USBSTS_CNR to get cleared. */
1080 csb_writel(tegra, CPUCTL_STARTCPU, XUSB_FALC_CPUCTL);
1081
1082 if (tegra_xusb_wait_for_falcon(tegra))
1083 return -EIO;
1084
1085 timestamp = le32_to_cpu(header->fwimg_created_time);
1086
1087 dev_info(dev, "Firmware timestamp: %ptTs UTC\n", ×tamp);
1088
1089 return 0;
1090}
1091
1092static u32 tegra_xusb_read_firmware_header(struct tegra_xusb *tegra, u32 offset)
1093{
1094 /*
1095 * We only accept reading the firmware config table
1096 * The offset should not exceed the fw header structure
1097 */
1098 if (offset >= sizeof(struct tegra_xusb_fw_header))
1099 return 0;
1100
1101 bar2_writel(tegra, (FW_IOCTL_CFGTBL_READ << FW_IOCTL_TYPE_SHIFT) | offset,
1102 XUSB_BAR2_ARU_FW_SCRATCH);
1103 return bar2_readl(tegra, XUSB_BAR2_ARU_SMI_ARU_FW_SCRATCH_DATA0);
1104}
1105
1106static int tegra_xusb_init_ifr_firmware(struct tegra_xusb *tegra)
1107{
1108 time64_t timestamp;
1109
1110 if (tegra_xusb_wait_for_falcon(tegra))
1111 return -EIO;
1112
1113#define offsetof_32(X, Y) ((u8)(offsetof(X, Y) / sizeof(__le32)))
1114 timestamp = tegra_xusb_read_firmware_header(tegra, offsetof_32(struct tegra_xusb_fw_header,
1115 fwimg_created_time) << 2);
1116
1117 dev_info(tegra->dev, "Firmware timestamp: %ptTs UTC\n", ×tamp);
1118
1119 return 0;
1120}
1121
1122static int tegra_xusb_load_firmware(struct tegra_xusb *tegra)
1123{
1124 if (!tegra->soc->firmware)
1125 return tegra_xusb_init_ifr_firmware(tegra);
1126 else
1127 return tegra_xusb_load_firmware_rom(tegra);
1128}
1129
1130static void tegra_xusb_powerdomain_remove(struct device *dev,
1131 struct tegra_xusb *tegra)
1132{
1133 if (!tegra->use_genpd)
1134 return;
1135
1136 if (!IS_ERR_OR_NULL(tegra->genpd_dev_ss))
1137 dev_pm_domain_detach(tegra->genpd_dev_ss, true);
1138 if (!IS_ERR_OR_NULL(tegra->genpd_dev_host))
1139 dev_pm_domain_detach(tegra->genpd_dev_host, true);
1140}
1141
1142static int tegra_xusb_powerdomain_init(struct device *dev,
1143 struct tegra_xusb *tegra)
1144{
1145 int err;
1146
1147 tegra->genpd_dev_host = dev_pm_domain_attach_by_name(dev, "xusb_host");
1148 if (IS_ERR(tegra->genpd_dev_host)) {
1149 err = PTR_ERR(tegra->genpd_dev_host);
1150 dev_err(dev, "failed to get host pm-domain: %d\n", err);
1151 return err;
1152 }
1153
1154 tegra->genpd_dev_ss = dev_pm_domain_attach_by_name(dev, "xusb_ss");
1155 if (IS_ERR(tegra->genpd_dev_ss)) {
1156 err = PTR_ERR(tegra->genpd_dev_ss);
1157 dev_err(dev, "failed to get superspeed pm-domain: %d\n", err);
1158 return err;
1159 }
1160
1161 tegra->use_genpd = true;
1162
1163 return 0;
1164}
1165
1166static int tegra_xusb_unpowergate_partitions(struct tegra_xusb *tegra)
1167{
1168 struct device *dev = tegra->dev;
1169 int rc;
1170
1171 if (tegra->use_genpd) {
1172 rc = pm_runtime_resume_and_get(tegra->genpd_dev_ss);
1173 if (rc < 0) {
1174 dev_err(dev, "failed to enable XUSB SS partition\n");
1175 return rc;
1176 }
1177
1178 rc = pm_runtime_resume_and_get(tegra->genpd_dev_host);
1179 if (rc < 0) {
1180 dev_err(dev, "failed to enable XUSB Host partition\n");
1181 pm_runtime_put_sync(tegra->genpd_dev_ss);
1182 return rc;
1183 }
1184 } else {
1185 rc = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBA,
1186 tegra->ss_clk,
1187 tegra->ss_rst);
1188 if (rc < 0) {
1189 dev_err(dev, "failed to enable XUSB SS partition\n");
1190 return rc;
1191 }
1192
1193 rc = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC,
1194 tegra->host_clk,
1195 tegra->host_rst);
1196 if (rc < 0) {
1197 dev_err(dev, "failed to enable XUSB Host partition\n");
1198 tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
1199 return rc;
1200 }
1201 }
1202
1203 return 0;
1204}
1205
1206static int tegra_xusb_powergate_partitions(struct tegra_xusb *tegra)
1207{
1208 struct device *dev = tegra->dev;
1209 int rc;
1210
1211 if (tegra->use_genpd) {
1212 rc = pm_runtime_put_sync(tegra->genpd_dev_host);
1213 if (rc < 0) {
1214 dev_err(dev, "failed to disable XUSB Host partition\n");
1215 return rc;
1216 }
1217
1218 rc = pm_runtime_put_sync(tegra->genpd_dev_ss);
1219 if (rc < 0) {
1220 dev_err(dev, "failed to disable XUSB SS partition\n");
1221 pm_runtime_get_sync(tegra->genpd_dev_host);
1222 return rc;
1223 }
1224 } else {
1225 rc = tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
1226 if (rc < 0) {
1227 dev_err(dev, "failed to disable XUSB Host partition\n");
1228 return rc;
1229 }
1230
1231 rc = tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
1232 if (rc < 0) {
1233 dev_err(dev, "failed to disable XUSB SS partition\n");
1234 tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC,
1235 tegra->host_clk,
1236 tegra->host_rst);
1237 return rc;
1238 }
1239 }
1240
1241 return 0;
1242}
1243
1244static int __tegra_xusb_enable_firmware_messages(struct tegra_xusb *tegra)
1245{
1246 struct tegra_xusb_mbox_msg msg;
1247 int err;
1248
1249 /* Enable firmware messages from controller. */
1250 msg.cmd = MBOX_CMD_MSG_ENABLED;
1251 msg.data = 0;
1252
1253 err = tegra_xusb_mbox_send(tegra, &msg);
1254 if (err < 0)
1255 dev_err(tegra->dev, "failed to enable messages: %d\n", err);
1256
1257 return err;
1258}
1259
1260static irqreturn_t tegra_xusb_padctl_irq(int irq, void *data)
1261{
1262 struct tegra_xusb *tegra = data;
1263
1264 mutex_lock(&tegra->lock);
1265
1266 if (tegra->suspended) {
1267 mutex_unlock(&tegra->lock);
1268 return IRQ_HANDLED;
1269 }
1270
1271 mutex_unlock(&tegra->lock);
1272
1273 pm_runtime_resume(tegra->dev);
1274
1275 return IRQ_HANDLED;
1276}
1277
1278static int tegra_xusb_enable_firmware_messages(struct tegra_xusb *tegra)
1279{
1280 int err;
1281
1282 mutex_lock(&tegra->lock);
1283 err = __tegra_xusb_enable_firmware_messages(tegra);
1284 mutex_unlock(&tegra->lock);
1285
1286 return err;
1287}
1288
1289static void tegra_xhci_set_port_power(struct tegra_xusb *tegra, bool main,
1290 bool set)
1291{
1292 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1293 struct usb_hcd *hcd = main ? xhci->main_hcd : xhci->shared_hcd;
1294 unsigned int wait = (!main && !set) ? 1000 : 10;
1295 u16 typeReq = set ? SetPortFeature : ClearPortFeature;
1296 u16 wIndex = main ? tegra->otg_usb2_port + 1 : tegra->otg_usb3_port + 1;
1297 u32 status;
1298 u32 stat_power = main ? USB_PORT_STAT_POWER : USB_SS_PORT_STAT_POWER;
1299 u32 status_val = set ? stat_power : 0;
1300
1301 dev_dbg(tegra->dev, "%s():%s %s port power\n", __func__,
1302 set ? "set" : "clear", main ? "HS" : "SS");
1303
1304 hcd->driver->hub_control(hcd, typeReq, USB_PORT_FEAT_POWER, wIndex,
1305 NULL, 0);
1306
1307 do {
1308 tegra_xhci_hc_driver.hub_control(hcd, GetPortStatus, 0, wIndex,
1309 (char *) &status, sizeof(status));
1310 if (status_val == (status & stat_power))
1311 break;
1312
1313 if (!main && !set)
1314 usleep_range(600, 700);
1315 else
1316 usleep_range(10, 20);
1317 } while (--wait > 0);
1318
1319 if (status_val != (status & stat_power))
1320 dev_info(tegra->dev, "failed to %s %s PP %d\n",
1321 set ? "set" : "clear",
1322 main ? "HS" : "SS", status);
1323}
1324
1325static struct phy *tegra_xusb_get_phy(struct tegra_xusb *tegra, char *name,
1326 int port)
1327{
1328 unsigned int i, phy_count = 0;
1329
1330 for (i = 0; i < tegra->soc->num_types; i++) {
1331 if (!strncmp(tegra->soc->phy_types[i].name, name,
1332 strlen(name)))
1333 return tegra->phys[phy_count+port];
1334
1335 phy_count += tegra->soc->phy_types[i].num;
1336 }
1337
1338 return NULL;
1339}
1340
1341static void tegra_xhci_id_work(struct work_struct *work)
1342{
1343 struct tegra_xusb *tegra = container_of(work, struct tegra_xusb,
1344 id_work);
1345 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1346 struct tegra_xusb_mbox_msg msg;
1347 struct phy *phy = tegra_xusb_get_phy(tegra, "usb2",
1348 tegra->otg_usb2_port);
1349 u32 status;
1350 int ret;
1351
1352 dev_dbg(tegra->dev, "host mode %s\n", tegra->host_mode ? "on" : "off");
1353
1354 mutex_lock(&tegra->lock);
1355
1356 if (tegra->host_mode)
1357 phy_set_mode_ext(phy, PHY_MODE_USB_OTG, USB_ROLE_HOST);
1358 else
1359 phy_set_mode_ext(phy, PHY_MODE_USB_OTG, USB_ROLE_NONE);
1360
1361 mutex_unlock(&tegra->lock);
1362
1363 tegra->otg_usb3_port = tegra_xusb_padctl_get_usb3_companion(tegra->padctl,
1364 tegra->otg_usb2_port);
1365
1366 if (tegra->host_mode) {
1367 /* switch to host mode */
1368 if (tegra->otg_usb3_port >= 0) {
1369 if (tegra->soc->otg_reset_sspi) {
1370 /* set PP=0 */
1371 tegra_xhci_hc_driver.hub_control(
1372 xhci->shared_hcd, GetPortStatus,
1373 0, tegra->otg_usb3_port+1,
1374 (char *) &status, sizeof(status));
1375 if (status & USB_SS_PORT_STAT_POWER)
1376 tegra_xhci_set_port_power(tegra, false,
1377 false);
1378
1379 /* reset OTG port SSPI */
1380 msg.cmd = MBOX_CMD_RESET_SSPI;
1381 msg.data = tegra->otg_usb3_port+1;
1382
1383 ret = tegra_xusb_mbox_send(tegra, &msg);
1384 if (ret < 0) {
1385 dev_info(tegra->dev,
1386 "failed to RESET_SSPI %d\n",
1387 ret);
1388 }
1389 }
1390
1391 tegra_xhci_set_port_power(tegra, false, true);
1392 }
1393
1394 tegra_xhci_set_port_power(tegra, true, true);
1395
1396 } else {
1397 if (tegra->otg_usb3_port >= 0)
1398 tegra_xhci_set_port_power(tegra, false, false);
1399
1400 tegra_xhci_set_port_power(tegra, true, false);
1401 }
1402}
1403
1404#if IS_ENABLED(CONFIG_PM) || IS_ENABLED(CONFIG_PM_SLEEP)
1405static bool is_usb2_otg_phy(struct tegra_xusb *tegra, unsigned int index)
1406{
1407 return (tegra->usbphy[index] != NULL);
1408}
1409
1410static bool is_usb3_otg_phy(struct tegra_xusb *tegra, unsigned int index)
1411{
1412 struct tegra_xusb_padctl *padctl = tegra->padctl;
1413 unsigned int i;
1414 int port;
1415
1416 for (i = 0; i < tegra->num_usb_phys; i++) {
1417 if (is_usb2_otg_phy(tegra, i)) {
1418 port = tegra_xusb_padctl_get_usb3_companion(padctl, i);
1419 if ((port >= 0) && (index == (unsigned int)port))
1420 return true;
1421 }
1422 }
1423
1424 return false;
1425}
1426
1427static bool is_host_mode_phy(struct tegra_xusb *tegra, unsigned int phy_type, unsigned int index)
1428{
1429 if (strcmp(tegra->soc->phy_types[phy_type].name, "hsic") == 0)
1430 return true;
1431
1432 if (strcmp(tegra->soc->phy_types[phy_type].name, "usb2") == 0) {
1433 if (is_usb2_otg_phy(tegra, index))
1434 return ((index == tegra->otg_usb2_port) && tegra->host_mode);
1435 else
1436 return true;
1437 }
1438
1439 if (strcmp(tegra->soc->phy_types[phy_type].name, "usb3") == 0) {
1440 if (is_usb3_otg_phy(tegra, index))
1441 return ((index == tegra->otg_usb3_port) && tegra->host_mode);
1442 else
1443 return true;
1444 }
1445
1446 return false;
1447}
1448#endif
1449
1450static int tegra_xusb_get_usb2_port(struct tegra_xusb *tegra,
1451 struct usb_phy *usbphy)
1452{
1453 unsigned int i;
1454
1455 for (i = 0; i < tegra->num_usb_phys; i++) {
1456 if (tegra->usbphy[i] && usbphy == tegra->usbphy[i])
1457 return i;
1458 }
1459
1460 return -1;
1461}
1462
1463static int tegra_xhci_id_notify(struct notifier_block *nb,
1464 unsigned long action, void *data)
1465{
1466 struct tegra_xusb *tegra = container_of(nb, struct tegra_xusb,
1467 id_nb);
1468 struct usb_phy *usbphy = (struct usb_phy *)data;
1469
1470 dev_dbg(tegra->dev, "%s(): action is %d", __func__, usbphy->last_event);
1471
1472 if ((tegra->host_mode && usbphy->last_event == USB_EVENT_ID) ||
1473 (!tegra->host_mode && usbphy->last_event != USB_EVENT_ID)) {
1474 dev_dbg(tegra->dev, "Same role(%d) received. Ignore",
1475 tegra->host_mode);
1476 return NOTIFY_OK;
1477 }
1478
1479 tegra->otg_usb2_port = tegra_xusb_get_usb2_port(tegra, usbphy);
1480
1481 tegra->host_mode = (usbphy->last_event == USB_EVENT_ID) ? true : false;
1482
1483 schedule_work(&tegra->id_work);
1484
1485 return NOTIFY_OK;
1486}
1487
1488static int tegra_xusb_init_usb_phy(struct tegra_xusb *tegra)
1489{
1490 unsigned int i;
1491
1492 tegra->usbphy = devm_kcalloc(tegra->dev, tegra->num_usb_phys,
1493 sizeof(*tegra->usbphy), GFP_KERNEL);
1494 if (!tegra->usbphy)
1495 return -ENOMEM;
1496
1497 INIT_WORK(&tegra->id_work, tegra_xhci_id_work);
1498 tegra->id_nb.notifier_call = tegra_xhci_id_notify;
1499 tegra->otg_usb2_port = -EINVAL;
1500 tegra->otg_usb3_port = -EINVAL;
1501
1502 for (i = 0; i < tegra->num_usb_phys; i++) {
1503 struct phy *phy = tegra_xusb_get_phy(tegra, "usb2", i);
1504
1505 if (!phy)
1506 continue;
1507
1508 tegra->usbphy[i] = devm_usb_get_phy_by_node(tegra->dev,
1509 phy->dev.of_node,
1510 &tegra->id_nb);
1511 if (!IS_ERR(tegra->usbphy[i])) {
1512 dev_dbg(tegra->dev, "usbphy-%d registered", i);
1513 otg_set_host(tegra->usbphy[i]->otg, &tegra->hcd->self);
1514 } else {
1515 /*
1516 * usb-phy is optional, continue if its not available.
1517 */
1518 tegra->usbphy[i] = NULL;
1519 }
1520 }
1521
1522 return 0;
1523}
1524
1525static void tegra_xusb_deinit_usb_phy(struct tegra_xusb *tegra)
1526{
1527 unsigned int i;
1528
1529 cancel_work_sync(&tegra->id_work);
1530
1531 for (i = 0; i < tegra->num_usb_phys; i++)
1532 if (tegra->usbphy[i])
1533 otg_set_host(tegra->usbphy[i]->otg, NULL);
1534}
1535
1536static int tegra_xusb_probe(struct platform_device *pdev)
1537{
1538 struct tegra_xusb *tegra;
1539 struct device_node *np;
1540 struct resource *regs;
1541 struct xhci_hcd *xhci;
1542 unsigned int i, j, k;
1543 struct phy *phy;
1544 int err;
1545
1546 BUILD_BUG_ON(sizeof(struct tegra_xusb_fw_header) != 256);
1547
1548 tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL);
1549 if (!tegra)
1550 return -ENOMEM;
1551
1552 tegra->soc = of_device_get_match_data(&pdev->dev);
1553 mutex_init(&tegra->lock);
1554 tegra->dev = &pdev->dev;
1555
1556 err = tegra_xusb_init_context(tegra);
1557 if (err < 0)
1558 return err;
1559
1560 tegra->regs = devm_platform_get_and_ioremap_resource(pdev, 0, ®s);
1561 if (IS_ERR(tegra->regs))
1562 return PTR_ERR(tegra->regs);
1563
1564 tegra->fpci_base = devm_platform_ioremap_resource(pdev, 1);
1565 if (IS_ERR(tegra->fpci_base))
1566 return PTR_ERR(tegra->fpci_base);
1567
1568 if (tegra->soc->has_ipfs) {
1569 tegra->ipfs_base = devm_platform_ioremap_resource(pdev, 2);
1570 if (IS_ERR(tegra->ipfs_base))
1571 return PTR_ERR(tegra->ipfs_base);
1572 } else if (tegra->soc->has_bar2) {
1573 tegra->bar2_base = devm_platform_get_and_ioremap_resource(pdev, 2, &tegra->bar2);
1574 if (IS_ERR(tegra->bar2_base))
1575 return PTR_ERR(tegra->bar2_base);
1576 }
1577
1578 tegra->xhci_irq = platform_get_irq(pdev, 0);
1579 if (tegra->xhci_irq < 0)
1580 return tegra->xhci_irq;
1581
1582 tegra->mbox_irq = platform_get_irq(pdev, 1);
1583 if (tegra->mbox_irq < 0)
1584 return tegra->mbox_irq;
1585
1586 tegra->padctl = tegra_xusb_padctl_get(&pdev->dev);
1587 if (IS_ERR(tegra->padctl))
1588 return PTR_ERR(tegra->padctl);
1589
1590 np = of_parse_phandle(pdev->dev.of_node, "nvidia,xusb-padctl", 0);
1591 if (!np) {
1592 err = -ENODEV;
1593 goto put_padctl;
1594 }
1595
1596 tegra->padctl_irq = of_irq_get(np, 0);
1597 if (tegra->padctl_irq == -EPROBE_DEFER) {
1598 err = tegra->padctl_irq;
1599 goto put_padctl;
1600 } else if (tegra->padctl_irq <= 0) {
1601 /* Older device-trees don't have padctrl interrupt */
1602 tegra->padctl_irq = 0;
1603 dev_dbg(&pdev->dev,
1604 "%pOF is missing an interrupt, disabling PM support\n", np);
1605 }
1606
1607 tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host");
1608 if (IS_ERR(tegra->host_clk)) {
1609 err = PTR_ERR(tegra->host_clk);
1610 dev_err(&pdev->dev, "failed to get xusb_host: %d\n", err);
1611 goto put_padctl;
1612 }
1613
1614 tegra->falcon_clk = devm_clk_get(&pdev->dev, "xusb_falcon_src");
1615 if (IS_ERR(tegra->falcon_clk)) {
1616 err = PTR_ERR(tegra->falcon_clk);
1617 dev_err(&pdev->dev, "failed to get xusb_falcon_src: %d\n", err);
1618 goto put_padctl;
1619 }
1620
1621 tegra->ss_clk = devm_clk_get(&pdev->dev, "xusb_ss");
1622 if (IS_ERR(tegra->ss_clk)) {
1623 err = PTR_ERR(tegra->ss_clk);
1624 dev_err(&pdev->dev, "failed to get xusb_ss: %d\n", err);
1625 goto put_padctl;
1626 }
1627
1628 tegra->ss_src_clk = devm_clk_get(&pdev->dev, "xusb_ss_src");
1629 if (IS_ERR(tegra->ss_src_clk)) {
1630 err = PTR_ERR(tegra->ss_src_clk);
1631 dev_err(&pdev->dev, "failed to get xusb_ss_src: %d\n", err);
1632 goto put_padctl;
1633 }
1634
1635 tegra->hs_src_clk = devm_clk_get(&pdev->dev, "xusb_hs_src");
1636 if (IS_ERR(tegra->hs_src_clk)) {
1637 err = PTR_ERR(tegra->hs_src_clk);
1638 dev_err(&pdev->dev, "failed to get xusb_hs_src: %d\n", err);
1639 goto put_padctl;
1640 }
1641
1642 tegra->fs_src_clk = devm_clk_get(&pdev->dev, "xusb_fs_src");
1643 if (IS_ERR(tegra->fs_src_clk)) {
1644 err = PTR_ERR(tegra->fs_src_clk);
1645 dev_err(&pdev->dev, "failed to get xusb_fs_src: %d\n", err);
1646 goto put_padctl;
1647 }
1648
1649 tegra->pll_u_480m = devm_clk_get(&pdev->dev, "pll_u_480m");
1650 if (IS_ERR(tegra->pll_u_480m)) {
1651 err = PTR_ERR(tegra->pll_u_480m);
1652 dev_err(&pdev->dev, "failed to get pll_u_480m: %d\n", err);
1653 goto put_padctl;
1654 }
1655
1656 tegra->clk_m = devm_clk_get(&pdev->dev, "clk_m");
1657 if (IS_ERR(tegra->clk_m)) {
1658 err = PTR_ERR(tegra->clk_m);
1659 dev_err(&pdev->dev, "failed to get clk_m: %d\n", err);
1660 goto put_padctl;
1661 }
1662
1663 tegra->pll_e = devm_clk_get(&pdev->dev, "pll_e");
1664 if (IS_ERR(tegra->pll_e)) {
1665 err = PTR_ERR(tegra->pll_e);
1666 dev_err(&pdev->dev, "failed to get pll_e: %d\n", err);
1667 goto put_padctl;
1668 }
1669
1670 if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) {
1671 tegra->host_rst = devm_reset_control_get(&pdev->dev,
1672 "xusb_host");
1673 if (IS_ERR(tegra->host_rst)) {
1674 err = PTR_ERR(tegra->host_rst);
1675 dev_err(&pdev->dev,
1676 "failed to get xusb_host reset: %d\n", err);
1677 goto put_padctl;
1678 }
1679
1680 tegra->ss_rst = devm_reset_control_get(&pdev->dev, "xusb_ss");
1681 if (IS_ERR(tegra->ss_rst)) {
1682 err = PTR_ERR(tegra->ss_rst);
1683 dev_err(&pdev->dev, "failed to get xusb_ss reset: %d\n",
1684 err);
1685 goto put_padctl;
1686 }
1687 } else {
1688 err = tegra_xusb_powerdomain_init(&pdev->dev, tegra);
1689 if (err)
1690 goto put_powerdomains;
1691 }
1692
1693 tegra->supplies = devm_kcalloc(&pdev->dev, tegra->soc->num_supplies,
1694 sizeof(*tegra->supplies), GFP_KERNEL);
1695 if (!tegra->supplies) {
1696 err = -ENOMEM;
1697 goto put_powerdomains;
1698 }
1699
1700 regulator_bulk_set_supply_names(tegra->supplies,
1701 tegra->soc->supply_names,
1702 tegra->soc->num_supplies);
1703
1704 err = devm_regulator_bulk_get(&pdev->dev, tegra->soc->num_supplies,
1705 tegra->supplies);
1706 if (err) {
1707 dev_err(&pdev->dev, "failed to get regulators: %d\n", err);
1708 goto put_powerdomains;
1709 }
1710
1711 for (i = 0; i < tegra->soc->num_types; i++) {
1712 if (!strncmp(tegra->soc->phy_types[i].name, "usb2", 4))
1713 tegra->num_usb_phys = tegra->soc->phy_types[i].num;
1714 tegra->num_phys += tegra->soc->phy_types[i].num;
1715 }
1716
1717 tegra->phys = devm_kcalloc(&pdev->dev, tegra->num_phys,
1718 sizeof(*tegra->phys), GFP_KERNEL);
1719 if (!tegra->phys) {
1720 err = -ENOMEM;
1721 goto put_powerdomains;
1722 }
1723
1724 for (i = 0, k = 0; i < tegra->soc->num_types; i++) {
1725 char prop[8];
1726
1727 for (j = 0; j < tegra->soc->phy_types[i].num; j++) {
1728 snprintf(prop, sizeof(prop), "%s-%d",
1729 tegra->soc->phy_types[i].name, j);
1730
1731 phy = devm_phy_optional_get(&pdev->dev, prop);
1732 if (IS_ERR(phy)) {
1733 dev_err(&pdev->dev,
1734 "failed to get PHY %s: %ld\n", prop,
1735 PTR_ERR(phy));
1736 err = PTR_ERR(phy);
1737 goto put_powerdomains;
1738 }
1739
1740 tegra->phys[k++] = phy;
1741 }
1742 }
1743
1744 tegra->hcd = usb_create_hcd(&tegra_xhci_hc_driver, &pdev->dev,
1745 dev_name(&pdev->dev));
1746 if (!tegra->hcd) {
1747 err = -ENOMEM;
1748 goto put_powerdomains;
1749 }
1750
1751 tegra->hcd->skip_phy_initialization = 1;
1752 tegra->hcd->regs = tegra->regs;
1753 tegra->hcd->rsrc_start = regs->start;
1754 tegra->hcd->rsrc_len = resource_size(regs);
1755
1756 /*
1757 * This must happen after usb_create_hcd(), because usb_create_hcd()
1758 * will overwrite the drvdata of the device with the hcd it creates.
1759 */
1760 platform_set_drvdata(pdev, tegra);
1761
1762 err = tegra_xusb_clk_enable(tegra);
1763 if (err) {
1764 dev_err(tegra->dev, "failed to enable clocks: %d\n", err);
1765 goto put_hcd;
1766 }
1767
1768 err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies);
1769 if (err) {
1770 dev_err(tegra->dev, "failed to enable regulators: %d\n", err);
1771 goto disable_clk;
1772 }
1773
1774 err = tegra_xusb_phy_enable(tegra);
1775 if (err < 0) {
1776 dev_err(&pdev->dev, "failed to enable PHYs: %d\n", err);
1777 goto disable_regulator;
1778 }
1779
1780 /*
1781 * The XUSB Falcon microcontroller can only address 40 bits, so set
1782 * the DMA mask accordingly.
1783 */
1784 err = dma_set_mask_and_coherent(tegra->dev, DMA_BIT_MASK(40));
1785 if (err < 0) {
1786 dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
1787 goto disable_phy;
1788 }
1789
1790 if (tegra->soc->firmware) {
1791 err = tegra_xusb_request_firmware(tegra);
1792 if (err < 0) {
1793 dev_err(&pdev->dev,
1794 "failed to request firmware: %d\n", err);
1795 goto disable_phy;
1796 }
1797 }
1798
1799 err = tegra_xusb_unpowergate_partitions(tegra);
1800 if (err)
1801 goto free_firmware;
1802
1803 tegra_xusb_config(tegra);
1804
1805 err = tegra_xusb_load_firmware(tegra);
1806 if (err < 0) {
1807 dev_err(&pdev->dev, "failed to load firmware: %d\n", err);
1808 goto powergate;
1809 }
1810
1811 err = usb_add_hcd(tegra->hcd, tegra->xhci_irq, IRQF_SHARED);
1812 if (err < 0) {
1813 dev_err(&pdev->dev, "failed to add USB HCD: %d\n", err);
1814 goto powergate;
1815 }
1816
1817 device_wakeup_enable(tegra->hcd->self.controller);
1818
1819 xhci = hcd_to_xhci(tegra->hcd);
1820
1821 xhci->shared_hcd = usb_create_shared_hcd(&tegra_xhci_hc_driver,
1822 &pdev->dev,
1823 dev_name(&pdev->dev),
1824 tegra->hcd);
1825 if (!xhci->shared_hcd) {
1826 dev_err(&pdev->dev, "failed to create shared HCD\n");
1827 err = -ENOMEM;
1828 goto remove_usb2;
1829 }
1830
1831 if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
1832 xhci->shared_hcd->can_do_streams = 1;
1833
1834 err = usb_add_hcd(xhci->shared_hcd, tegra->xhci_irq, IRQF_SHARED);
1835 if (err < 0) {
1836 dev_err(&pdev->dev, "failed to add shared HCD: %d\n", err);
1837 goto put_usb3;
1838 }
1839
1840 err = devm_request_threaded_irq(&pdev->dev, tegra->mbox_irq,
1841 tegra_xusb_mbox_irq,
1842 tegra_xusb_mbox_thread, 0,
1843 dev_name(&pdev->dev), tegra);
1844 if (err < 0) {
1845 dev_err(&pdev->dev, "failed to request IRQ: %d\n", err);
1846 goto remove_usb3;
1847 }
1848
1849 if (tegra->padctl_irq) {
1850 err = devm_request_threaded_irq(&pdev->dev, tegra->padctl_irq,
1851 NULL, tegra_xusb_padctl_irq,
1852 IRQF_ONESHOT, dev_name(&pdev->dev),
1853 tegra);
1854 if (err < 0) {
1855 dev_err(&pdev->dev, "failed to request padctl IRQ: %d\n", err);
1856 goto remove_usb3;
1857 }
1858 }
1859
1860 err = tegra_xusb_enable_firmware_messages(tegra);
1861 if (err < 0) {
1862 dev_err(&pdev->dev, "failed to enable messages: %d\n", err);
1863 goto remove_usb3;
1864 }
1865
1866 err = tegra_xusb_init_usb_phy(tegra);
1867 if (err < 0) {
1868 dev_err(&pdev->dev, "failed to init USB PHY: %d\n", err);
1869 goto remove_usb3;
1870 }
1871
1872 /* Enable wake for both USB 2.0 and USB 3.0 roothubs */
1873 device_init_wakeup(&tegra->hcd->self.root_hub->dev, true);
1874 device_init_wakeup(&xhci->shared_hcd->self.root_hub->dev, true);
1875
1876 pm_runtime_use_autosuspend(tegra->dev);
1877 pm_runtime_set_autosuspend_delay(tegra->dev, 2000);
1878 pm_runtime_mark_last_busy(tegra->dev);
1879 pm_runtime_set_active(tegra->dev);
1880
1881 if (tegra->padctl_irq) {
1882 device_init_wakeup(tegra->dev, true);
1883 pm_runtime_enable(tegra->dev);
1884 }
1885
1886 return 0;
1887
1888remove_usb3:
1889 usb_remove_hcd(xhci->shared_hcd);
1890put_usb3:
1891 usb_put_hcd(xhci->shared_hcd);
1892remove_usb2:
1893 usb_remove_hcd(tegra->hcd);
1894powergate:
1895 tegra_xusb_powergate_partitions(tegra);
1896free_firmware:
1897 dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
1898 tegra->fw.phys);
1899disable_phy:
1900 tegra_xusb_phy_disable(tegra);
1901disable_regulator:
1902 regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
1903disable_clk:
1904 tegra_xusb_clk_disable(tegra);
1905put_hcd:
1906 usb_put_hcd(tegra->hcd);
1907put_powerdomains:
1908 tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
1909put_padctl:
1910 of_node_put(np);
1911 tegra_xusb_padctl_put(tegra->padctl);
1912 return err;
1913}
1914
1915static void tegra_xusb_disable(struct tegra_xusb *tegra)
1916{
1917 tegra_xusb_powergate_partitions(tegra);
1918 tegra_xusb_powerdomain_remove(tegra->dev, tegra);
1919 tegra_xusb_phy_disable(tegra);
1920 tegra_xusb_clk_disable(tegra);
1921 regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
1922}
1923
1924static void tegra_xusb_remove(struct platform_device *pdev)
1925{
1926 struct tegra_xusb *tegra = platform_get_drvdata(pdev);
1927 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1928
1929 tegra_xusb_deinit_usb_phy(tegra);
1930
1931 pm_runtime_get_sync(&pdev->dev);
1932 usb_remove_hcd(xhci->shared_hcd);
1933 usb_put_hcd(xhci->shared_hcd);
1934 xhci->shared_hcd = NULL;
1935 usb_remove_hcd(tegra->hcd);
1936 usb_put_hcd(tegra->hcd);
1937
1938 dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
1939 tegra->fw.phys);
1940
1941 if (tegra->padctl_irq)
1942 pm_runtime_disable(&pdev->dev);
1943
1944 pm_runtime_put(&pdev->dev);
1945
1946 tegra_xusb_disable(tegra);
1947 tegra_xusb_padctl_put(tegra->padctl);
1948}
1949
1950static void tegra_xusb_shutdown(struct platform_device *pdev)
1951{
1952 struct tegra_xusb *tegra = platform_get_drvdata(pdev);
1953
1954 pm_runtime_get_sync(&pdev->dev);
1955 disable_irq(tegra->xhci_irq);
1956 xhci_shutdown(tegra->hcd);
1957 tegra_xusb_disable(tegra);
1958}
1959
1960static bool xhci_hub_ports_suspended(struct xhci_hub *hub)
1961{
1962 struct device *dev = hub->hcd->self.controller;
1963 bool status = true;
1964 unsigned int i;
1965 u32 value;
1966
1967 for (i = 0; i < hub->num_ports; i++) {
1968 value = readl(hub->ports[i]->addr);
1969 if ((value & PORT_PE) == 0)
1970 continue;
1971
1972 if ((value & PORT_PLS_MASK) != XDEV_U3) {
1973 dev_info(dev, "%u-%u isn't suspended: %#010x\n",
1974 hub->hcd->self.busnum, i + 1, value);
1975 status = false;
1976 }
1977 }
1978
1979 return status;
1980}
1981
1982static int tegra_xusb_check_ports(struct tegra_xusb *tegra)
1983{
1984 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1985 struct xhci_bus_state *bus_state = &xhci->usb2_rhub.bus_state;
1986 unsigned long flags;
1987 int err = 0;
1988
1989 if (bus_state->bus_suspended) {
1990 /* xusb_hub_suspend() has just directed one or more USB2 port(s)
1991 * to U3 state, it takes 3ms to enter U3.
1992 */
1993 usleep_range(3000, 4000);
1994 }
1995
1996 spin_lock_irqsave(&xhci->lock, flags);
1997
1998 if (!xhci_hub_ports_suspended(&xhci->usb2_rhub) ||
1999 !xhci_hub_ports_suspended(&xhci->usb3_rhub))
2000 err = -EBUSY;
2001
2002 spin_unlock_irqrestore(&xhci->lock, flags);
2003
2004 return err;
2005}
2006
2007static void tegra_xusb_save_context(struct tegra_xusb *tegra)
2008{
2009 const struct tegra_xusb_context_soc *soc = tegra->soc->context;
2010 struct tegra_xusb_context *ctx = &tegra->context;
2011 unsigned int i;
2012
2013 if (soc->ipfs.num_offsets > 0) {
2014 for (i = 0; i < soc->ipfs.num_offsets; i++)
2015 ctx->ipfs[i] = ipfs_readl(tegra, soc->ipfs.offsets[i]);
2016 }
2017
2018 if (soc->fpci.num_offsets > 0) {
2019 for (i = 0; i < soc->fpci.num_offsets; i++)
2020 ctx->fpci[i] = fpci_readl(tegra, soc->fpci.offsets[i]);
2021 }
2022}
2023
2024static void tegra_xusb_restore_context(struct tegra_xusb *tegra)
2025{
2026 const struct tegra_xusb_context_soc *soc = tegra->soc->context;
2027 struct tegra_xusb_context *ctx = &tegra->context;
2028 unsigned int i;
2029
2030 if (soc->fpci.num_offsets > 0) {
2031 for (i = 0; i < soc->fpci.num_offsets; i++)
2032 fpci_writel(tegra, ctx->fpci[i], soc->fpci.offsets[i]);
2033 }
2034
2035 if (soc->ipfs.num_offsets > 0) {
2036 for (i = 0; i < soc->ipfs.num_offsets; i++)
2037 ipfs_writel(tegra, ctx->ipfs[i], soc->ipfs.offsets[i]);
2038 }
2039}
2040
2041static enum usb_device_speed tegra_xhci_portsc_to_speed(struct tegra_xusb *tegra, u32 portsc)
2042{
2043 if (DEV_LOWSPEED(portsc))
2044 return USB_SPEED_LOW;
2045
2046 if (DEV_HIGHSPEED(portsc))
2047 return USB_SPEED_HIGH;
2048
2049 if (DEV_FULLSPEED(portsc))
2050 return USB_SPEED_FULL;
2051
2052 if (DEV_SUPERSPEED_ANY(portsc))
2053 return USB_SPEED_SUPER;
2054
2055 return USB_SPEED_UNKNOWN;
2056}
2057
2058static void tegra_xhci_enable_phy_sleepwalk_wake(struct tegra_xusb *tegra)
2059{
2060 struct tegra_xusb_padctl *padctl = tegra->padctl;
2061 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
2062 enum usb_device_speed speed;
2063 struct phy *phy;
2064 unsigned int index, offset;
2065 unsigned int i, j, k;
2066 struct xhci_hub *rhub;
2067 u32 portsc;
2068
2069 for (i = 0, k = 0; i < tegra->soc->num_types; i++) {
2070 if (strcmp(tegra->soc->phy_types[i].name, "usb3") == 0)
2071 rhub = &xhci->usb3_rhub;
2072 else
2073 rhub = &xhci->usb2_rhub;
2074
2075 if (strcmp(tegra->soc->phy_types[i].name, "hsic") == 0)
2076 offset = tegra->soc->ports.usb2.count;
2077 else
2078 offset = 0;
2079
2080 for (j = 0; j < tegra->soc->phy_types[i].num; j++) {
2081 phy = tegra->phys[k++];
2082
2083 if (!phy)
2084 continue;
2085
2086 index = j + offset;
2087
2088 if (index >= rhub->num_ports)
2089 continue;
2090
2091 if (!is_host_mode_phy(tegra, i, j))
2092 continue;
2093
2094 portsc = readl(rhub->ports[index]->addr);
2095 speed = tegra_xhci_portsc_to_speed(tegra, portsc);
2096 tegra_xusb_padctl_enable_phy_sleepwalk(padctl, phy, speed);
2097 tegra_xusb_padctl_enable_phy_wake(padctl, phy);
2098 }
2099 }
2100}
2101
2102static void tegra_xhci_disable_phy_wake(struct tegra_xusb *tegra)
2103{
2104 struct tegra_xusb_padctl *padctl = tegra->padctl;
2105 unsigned int i;
2106
2107 for (i = 0; i < tegra->num_usb_phys; i++) {
2108 struct phy *phy = tegra_xusb_get_phy(tegra, "usb2", i);
2109
2110 if (!phy)
2111 continue;
2112
2113 if (tegra_xusb_padctl_remote_wake_detected(padctl, phy))
2114 tegra_phy_xusb_utmi_pad_power_on(phy);
2115 }
2116
2117 for (i = 0; i < tegra->num_phys; i++) {
2118 if (!tegra->phys[i])
2119 continue;
2120
2121 if (tegra_xusb_padctl_remote_wake_detected(padctl, tegra->phys[i]))
2122 dev_dbg(tegra->dev, "%pOF remote wake detected\n",
2123 tegra->phys[i]->dev.of_node);
2124
2125 tegra_xusb_padctl_disable_phy_wake(padctl, tegra->phys[i]);
2126 }
2127}
2128
2129static void tegra_xhci_disable_phy_sleepwalk(struct tegra_xusb *tegra)
2130{
2131 struct tegra_xusb_padctl *padctl = tegra->padctl;
2132 unsigned int i;
2133
2134 for (i = 0; i < tegra->num_phys; i++) {
2135 if (!tegra->phys[i])
2136 continue;
2137
2138 tegra_xusb_padctl_disable_phy_sleepwalk(padctl, tegra->phys[i]);
2139 }
2140}
2141
2142static void tegra_xhci_program_utmi_power_lp0_exit(struct tegra_xusb *tegra)
2143{
2144 unsigned int i, index_to_usb2;
2145 struct phy *phy;
2146
2147 for (i = 0; i < tegra->soc->num_types; i++) {
2148 if (strcmp(tegra->soc->phy_types[i].name, "usb2") == 0)
2149 index_to_usb2 = i;
2150 }
2151
2152 for (i = 0; i < tegra->num_usb_phys; i++) {
2153 if (!is_host_mode_phy(tegra, index_to_usb2, i))
2154 continue;
2155
2156 phy = tegra_xusb_get_phy(tegra, "usb2", i);
2157 if (tegra->lp0_utmi_pad_mask & BIT(i))
2158 tegra_phy_xusb_utmi_pad_power_on(phy);
2159 else
2160 tegra_phy_xusb_utmi_pad_power_down(phy);
2161 }
2162}
2163
2164static int tegra_xusb_enter_elpg(struct tegra_xusb *tegra, bool runtime)
2165{
2166 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
2167 struct device *dev = tegra->dev;
2168 bool wakeup = runtime ? true : device_may_wakeup(dev);
2169 unsigned int i;
2170 int err;
2171 u32 usbcmd;
2172 u32 portsc;
2173
2174 dev_dbg(dev, "entering ELPG\n");
2175
2176 usbcmd = readl(&xhci->op_regs->command);
2177 usbcmd &= ~CMD_EIE;
2178 writel(usbcmd, &xhci->op_regs->command);
2179
2180 err = tegra_xusb_check_ports(tegra);
2181 if (err < 0) {
2182 dev_err(tegra->dev, "not all ports suspended: %d\n", err);
2183 goto out;
2184 }
2185
2186 for (i = 0; i < tegra->num_usb_phys; i++) {
2187 if (!xhci->usb2_rhub.ports[i])
2188 continue;
2189 portsc = readl(xhci->usb2_rhub.ports[i]->addr);
2190 tegra->lp0_utmi_pad_mask &= ~BIT(i);
2191 if (((portsc & PORT_PLS_MASK) == XDEV_U3) || ((portsc & DEV_SPEED_MASK) == XDEV_FS))
2192 tegra->lp0_utmi_pad_mask |= BIT(i);
2193 }
2194
2195 err = xhci_suspend(xhci, wakeup);
2196 if (err < 0) {
2197 dev_err(tegra->dev, "failed to suspend XHCI: %d\n", err);
2198 goto out;
2199 }
2200
2201 tegra_xusb_save_context(tegra);
2202
2203 if (wakeup)
2204 tegra_xhci_enable_phy_sleepwalk_wake(tegra);
2205
2206 tegra_xusb_powergate_partitions(tegra);
2207
2208 for (i = 0; i < tegra->num_phys; i++) {
2209 if (!tegra->phys[i])
2210 continue;
2211
2212 phy_power_off(tegra->phys[i]);
2213 if (!wakeup)
2214 phy_exit(tegra->phys[i]);
2215 }
2216
2217 tegra_xusb_clk_disable(tegra);
2218
2219out:
2220 if (!err)
2221 dev_dbg(tegra->dev, "entering ELPG done\n");
2222 else {
2223 usbcmd = readl(&xhci->op_regs->command);
2224 usbcmd |= CMD_EIE;
2225 writel(usbcmd, &xhci->op_regs->command);
2226
2227 dev_dbg(tegra->dev, "entering ELPG failed\n");
2228 pm_runtime_mark_last_busy(tegra->dev);
2229 }
2230
2231 return err;
2232}
2233
2234static int tegra_xusb_exit_elpg(struct tegra_xusb *tegra, bool runtime)
2235{
2236 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
2237 struct device *dev = tegra->dev;
2238 bool wakeup = runtime ? true : device_may_wakeup(dev);
2239 unsigned int i;
2240 u32 usbcmd;
2241 int err;
2242
2243 dev_dbg(dev, "exiting ELPG\n");
2244 pm_runtime_mark_last_busy(tegra->dev);
2245
2246 err = tegra_xusb_clk_enable(tegra);
2247 if (err < 0) {
2248 dev_err(tegra->dev, "failed to enable clocks: %d\n", err);
2249 goto out;
2250 }
2251
2252 err = tegra_xusb_unpowergate_partitions(tegra);
2253 if (err)
2254 goto disable_clks;
2255
2256 if (wakeup)
2257 tegra_xhci_disable_phy_wake(tegra);
2258
2259 for (i = 0; i < tegra->num_phys; i++) {
2260 if (!tegra->phys[i])
2261 continue;
2262
2263 if (!wakeup)
2264 phy_init(tegra->phys[i]);
2265
2266 phy_power_on(tegra->phys[i]);
2267 }
2268 if (tegra->suspended)
2269 tegra_xhci_program_utmi_power_lp0_exit(tegra);
2270
2271 tegra_xusb_config(tegra);
2272 tegra_xusb_restore_context(tegra);
2273
2274 err = tegra_xusb_load_firmware(tegra);
2275 if (err < 0) {
2276 dev_err(tegra->dev, "failed to load firmware: %d\n", err);
2277 goto disable_phy;
2278 }
2279
2280 err = __tegra_xusb_enable_firmware_messages(tegra);
2281 if (err < 0) {
2282 dev_err(tegra->dev, "failed to enable messages: %d\n", err);
2283 goto disable_phy;
2284 }
2285
2286 if (wakeup)
2287 tegra_xhci_disable_phy_sleepwalk(tegra);
2288
2289 err = xhci_resume(xhci, runtime ? PMSG_AUTO_RESUME : PMSG_RESUME);
2290 if (err < 0) {
2291 dev_err(tegra->dev, "failed to resume XHCI: %d\n", err);
2292 goto disable_phy;
2293 }
2294
2295 usbcmd = readl(&xhci->op_regs->command);
2296 usbcmd |= CMD_EIE;
2297 writel(usbcmd, &xhci->op_regs->command);
2298
2299 goto out;
2300
2301disable_phy:
2302 for (i = 0; i < tegra->num_phys; i++) {
2303 if (!tegra->phys[i])
2304 continue;
2305
2306 phy_power_off(tegra->phys[i]);
2307 if (!wakeup)
2308 phy_exit(tegra->phys[i]);
2309 }
2310 tegra_xusb_powergate_partitions(tegra);
2311disable_clks:
2312 tegra_xusb_clk_disable(tegra);
2313out:
2314 if (!err)
2315 dev_dbg(dev, "exiting ELPG done\n");
2316 else
2317 dev_dbg(dev, "exiting ELPG failed\n");
2318
2319 return err;
2320}
2321
2322static __maybe_unused int tegra_xusb_suspend(struct device *dev)
2323{
2324 struct tegra_xusb *tegra = dev_get_drvdata(dev);
2325 int err;
2326
2327 synchronize_irq(tegra->mbox_irq);
2328
2329 mutex_lock(&tegra->lock);
2330
2331 if (pm_runtime_suspended(dev)) {
2332 err = tegra_xusb_exit_elpg(tegra, true);
2333 if (err < 0)
2334 goto out;
2335 }
2336
2337 err = tegra_xusb_enter_elpg(tegra, false);
2338 if (err < 0) {
2339 if (pm_runtime_suspended(dev)) {
2340 pm_runtime_disable(dev);
2341 pm_runtime_set_active(dev);
2342 pm_runtime_enable(dev);
2343 }
2344
2345 goto out;
2346 }
2347
2348out:
2349 if (!err) {
2350 tegra->suspended = true;
2351 pm_runtime_disable(dev);
2352
2353 if (device_may_wakeup(dev)) {
2354 if (enable_irq_wake(tegra->padctl_irq))
2355 dev_err(dev, "failed to enable padctl wakes\n");
2356 }
2357 }
2358
2359 mutex_unlock(&tegra->lock);
2360
2361 return err;
2362}
2363
2364static __maybe_unused int tegra_xusb_resume(struct device *dev)
2365{
2366 struct tegra_xusb *tegra = dev_get_drvdata(dev);
2367 int err;
2368
2369 mutex_lock(&tegra->lock);
2370
2371 if (!tegra->suspended) {
2372 mutex_unlock(&tegra->lock);
2373 return 0;
2374 }
2375
2376 err = tegra_xusb_exit_elpg(tegra, false);
2377 if (err < 0) {
2378 mutex_unlock(&tegra->lock);
2379 return err;
2380 }
2381
2382 if (device_may_wakeup(dev)) {
2383 if (disable_irq_wake(tegra->padctl_irq))
2384 dev_err(dev, "failed to disable padctl wakes\n");
2385 }
2386 tegra->suspended = false;
2387 mutex_unlock(&tegra->lock);
2388
2389 pm_runtime_set_active(dev);
2390 pm_runtime_enable(dev);
2391
2392 return 0;
2393}
2394
2395static __maybe_unused int tegra_xusb_runtime_suspend(struct device *dev)
2396{
2397 struct tegra_xusb *tegra = dev_get_drvdata(dev);
2398 int ret;
2399
2400 synchronize_irq(tegra->mbox_irq);
2401 mutex_lock(&tegra->lock);
2402 ret = tegra_xusb_enter_elpg(tegra, true);
2403 mutex_unlock(&tegra->lock);
2404
2405 return ret;
2406}
2407
2408static __maybe_unused int tegra_xusb_runtime_resume(struct device *dev)
2409{
2410 struct tegra_xusb *tegra = dev_get_drvdata(dev);
2411 int err;
2412
2413 mutex_lock(&tegra->lock);
2414 err = tegra_xusb_exit_elpg(tegra, true);
2415 mutex_unlock(&tegra->lock);
2416
2417 return err;
2418}
2419
2420static const struct dev_pm_ops tegra_xusb_pm_ops = {
2421 SET_RUNTIME_PM_OPS(tegra_xusb_runtime_suspend,
2422 tegra_xusb_runtime_resume, NULL)
2423 SET_SYSTEM_SLEEP_PM_OPS(tegra_xusb_suspend, tegra_xusb_resume)
2424};
2425
2426static const char * const tegra124_supply_names[] = {
2427 "avddio-pex",
2428 "dvddio-pex",
2429 "avdd-usb",
2430 "hvdd-usb-ss",
2431};
2432
2433static const struct tegra_xusb_phy_type tegra124_phy_types[] = {
2434 { .name = "usb3", .num = 2, },
2435 { .name = "usb2", .num = 3, },
2436 { .name = "hsic", .num = 2, },
2437};
2438
2439static const unsigned int tegra124_xusb_context_ipfs[] = {
2440 IPFS_XUSB_HOST_MSI_BAR_SZ_0,
2441 IPFS_XUSB_HOST_MSI_AXI_BAR_ST_0,
2442 IPFS_XUSB_HOST_MSI_FPCI_BAR_ST_0,
2443 IPFS_XUSB_HOST_MSI_VEC0_0,
2444 IPFS_XUSB_HOST_MSI_EN_VEC0_0,
2445 IPFS_XUSB_HOST_FPCI_ERROR_MASKS_0,
2446 IPFS_XUSB_HOST_INTR_MASK_0,
2447 IPFS_XUSB_HOST_INTR_ENABLE_0,
2448 IPFS_XUSB_HOST_UFPCI_CONFIG_0,
2449 IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0,
2450 IPFS_XUSB_HOST_MCCIF_FIFOCTRL_0,
2451};
2452
2453static const unsigned int tegra124_xusb_context_fpci[] = {
2454 XUSB_CFG_ARU_CONTEXT_HS_PLS,
2455 XUSB_CFG_ARU_CONTEXT_FS_PLS,
2456 XUSB_CFG_ARU_CONTEXT_HSFS_SPEED,
2457 XUSB_CFG_ARU_CONTEXT_HSFS_PP,
2458 XUSB_CFG_ARU_CONTEXT,
2459 XUSB_CFG_AXI_CFG,
2460 XUSB_CFG_24,
2461 XUSB_CFG_16,
2462};
2463
2464static const struct tegra_xusb_context_soc tegra124_xusb_context = {
2465 .ipfs = {
2466 .num_offsets = ARRAY_SIZE(tegra124_xusb_context_ipfs),
2467 .offsets = tegra124_xusb_context_ipfs,
2468 },
2469 .fpci = {
2470 .num_offsets = ARRAY_SIZE(tegra124_xusb_context_fpci),
2471 .offsets = tegra124_xusb_context_fpci,
2472 },
2473};
2474
2475static const struct tegra_xusb_soc_ops tegra124_ops = {
2476 .mbox_reg_readl = &fpci_readl,
2477 .mbox_reg_writel = &fpci_writel,
2478 .csb_reg_readl = &fpci_csb_readl,
2479 .csb_reg_writel = &fpci_csb_writel,
2480};
2481
2482static const struct tegra_xusb_soc tegra124_soc = {
2483 .firmware = "nvidia/tegra124/xusb.bin",
2484 .supply_names = tegra124_supply_names,
2485 .num_supplies = ARRAY_SIZE(tegra124_supply_names),
2486 .phy_types = tegra124_phy_types,
2487 .num_types = ARRAY_SIZE(tegra124_phy_types),
2488 .context = &tegra124_xusb_context,
2489 .ports = {
2490 .usb2 = { .offset = 4, .count = 4, },
2491 .hsic = { .offset = 6, .count = 2, },
2492 .usb3 = { .offset = 0, .count = 2, },
2493 },
2494 .scale_ss_clock = true,
2495 .has_ipfs = true,
2496 .otg_reset_sspi = false,
2497 .ops = &tegra124_ops,
2498 .mbox = {
2499 .cmd = 0xe4,
2500 .data_in = 0xe8,
2501 .data_out = 0xec,
2502 .owner = 0xf0,
2503 .smi_intr = XUSB_CFG_ARU_SMI_INTR,
2504 },
2505};
2506MODULE_FIRMWARE("nvidia/tegra124/xusb.bin");
2507
2508static const char * const tegra210_supply_names[] = {
2509 "dvddio-pex",
2510 "hvddio-pex",
2511 "avdd-usb",
2512};
2513
2514static const struct tegra_xusb_phy_type tegra210_phy_types[] = {
2515 { .name = "usb3", .num = 4, },
2516 { .name = "usb2", .num = 4, },
2517 { .name = "hsic", .num = 1, },
2518};
2519
2520static const struct tegra_xusb_soc tegra210_soc = {
2521 .firmware = "nvidia/tegra210/xusb.bin",
2522 .supply_names = tegra210_supply_names,
2523 .num_supplies = ARRAY_SIZE(tegra210_supply_names),
2524 .phy_types = tegra210_phy_types,
2525 .num_types = ARRAY_SIZE(tegra210_phy_types),
2526 .context = &tegra124_xusb_context,
2527 .ports = {
2528 .usb2 = { .offset = 4, .count = 4, },
2529 .hsic = { .offset = 8, .count = 1, },
2530 .usb3 = { .offset = 0, .count = 4, },
2531 },
2532 .scale_ss_clock = false,
2533 .has_ipfs = true,
2534 .otg_reset_sspi = true,
2535 .ops = &tegra124_ops,
2536 .mbox = {
2537 .cmd = 0xe4,
2538 .data_in = 0xe8,
2539 .data_out = 0xec,
2540 .owner = 0xf0,
2541 .smi_intr = XUSB_CFG_ARU_SMI_INTR,
2542 },
2543};
2544MODULE_FIRMWARE("nvidia/tegra210/xusb.bin");
2545
2546static const char * const tegra186_supply_names[] = {
2547};
2548MODULE_FIRMWARE("nvidia/tegra186/xusb.bin");
2549
2550static const struct tegra_xusb_phy_type tegra186_phy_types[] = {
2551 { .name = "usb3", .num = 3, },
2552 { .name = "usb2", .num = 3, },
2553 { .name = "hsic", .num = 1, },
2554};
2555
2556static const struct tegra_xusb_context_soc tegra186_xusb_context = {
2557 .fpci = {
2558 .num_offsets = ARRAY_SIZE(tegra124_xusb_context_fpci),
2559 .offsets = tegra124_xusb_context_fpci,
2560 },
2561};
2562
2563static const struct tegra_xusb_soc tegra186_soc = {
2564 .firmware = "nvidia/tegra186/xusb.bin",
2565 .supply_names = tegra186_supply_names,
2566 .num_supplies = ARRAY_SIZE(tegra186_supply_names),
2567 .phy_types = tegra186_phy_types,
2568 .num_types = ARRAY_SIZE(tegra186_phy_types),
2569 .context = &tegra186_xusb_context,
2570 .ports = {
2571 .usb3 = { .offset = 0, .count = 3, },
2572 .usb2 = { .offset = 3, .count = 3, },
2573 .hsic = { .offset = 6, .count = 1, },
2574 },
2575 .scale_ss_clock = false,
2576 .has_ipfs = false,
2577 .otg_reset_sspi = false,
2578 .ops = &tegra124_ops,
2579 .mbox = {
2580 .cmd = 0xe4,
2581 .data_in = 0xe8,
2582 .data_out = 0xec,
2583 .owner = 0xf0,
2584 .smi_intr = XUSB_CFG_ARU_SMI_INTR,
2585 },
2586 .lpm_support = true,
2587};
2588
2589static const char * const tegra194_supply_names[] = {
2590};
2591
2592static const struct tegra_xusb_phy_type tegra194_phy_types[] = {
2593 { .name = "usb3", .num = 4, },
2594 { .name = "usb2", .num = 4, },
2595};
2596
2597static const struct tegra_xusb_soc tegra194_soc = {
2598 .firmware = "nvidia/tegra194/xusb.bin",
2599 .supply_names = tegra194_supply_names,
2600 .num_supplies = ARRAY_SIZE(tegra194_supply_names),
2601 .phy_types = tegra194_phy_types,
2602 .num_types = ARRAY_SIZE(tegra194_phy_types),
2603 .context = &tegra186_xusb_context,
2604 .ports = {
2605 .usb3 = { .offset = 0, .count = 4, },
2606 .usb2 = { .offset = 4, .count = 4, },
2607 },
2608 .scale_ss_clock = false,
2609 .has_ipfs = false,
2610 .otg_reset_sspi = false,
2611 .ops = &tegra124_ops,
2612 .mbox = {
2613 .cmd = 0x68,
2614 .data_in = 0x6c,
2615 .data_out = 0x70,
2616 .owner = 0x74,
2617 .smi_intr = XUSB_CFG_ARU_SMI_INTR,
2618 },
2619 .lpm_support = true,
2620};
2621MODULE_FIRMWARE("nvidia/tegra194/xusb.bin");
2622
2623static const struct tegra_xusb_soc_ops tegra234_ops = {
2624 .mbox_reg_readl = &bar2_readl,
2625 .mbox_reg_writel = &bar2_writel,
2626 .csb_reg_readl = &bar2_csb_readl,
2627 .csb_reg_writel = &bar2_csb_writel,
2628};
2629
2630static const struct tegra_xusb_soc tegra234_soc = {
2631 .supply_names = tegra194_supply_names,
2632 .num_supplies = ARRAY_SIZE(tegra194_supply_names),
2633 .phy_types = tegra194_phy_types,
2634 .num_types = ARRAY_SIZE(tegra194_phy_types),
2635 .context = &tegra186_xusb_context,
2636 .ports = {
2637 .usb3 = { .offset = 0, .count = 4, },
2638 .usb2 = { .offset = 4, .count = 4, },
2639 },
2640 .scale_ss_clock = false,
2641 .has_ipfs = false,
2642 .otg_reset_sspi = false,
2643 .ops = &tegra234_ops,
2644 .mbox = {
2645 .cmd = XUSB_BAR2_ARU_MBOX_CMD,
2646 .data_in = XUSB_BAR2_ARU_MBOX_DATA_IN,
2647 .data_out = XUSB_BAR2_ARU_MBOX_DATA_OUT,
2648 .owner = XUSB_BAR2_ARU_MBOX_OWNER,
2649 .smi_intr = XUSB_BAR2_ARU_SMI_INTR,
2650 },
2651 .lpm_support = true,
2652 .has_bar2 = true,
2653};
2654
2655static const struct of_device_id tegra_xusb_of_match[] = {
2656 { .compatible = "nvidia,tegra124-xusb", .data = &tegra124_soc },
2657 { .compatible = "nvidia,tegra210-xusb", .data = &tegra210_soc },
2658 { .compatible = "nvidia,tegra186-xusb", .data = &tegra186_soc },
2659 { .compatible = "nvidia,tegra194-xusb", .data = &tegra194_soc },
2660 { .compatible = "nvidia,tegra234-xusb", .data = &tegra234_soc },
2661 { },
2662};
2663MODULE_DEVICE_TABLE(of, tegra_xusb_of_match);
2664
2665static struct platform_driver tegra_xusb_driver = {
2666 .probe = tegra_xusb_probe,
2667 .remove_new = tegra_xusb_remove,
2668 .shutdown = tegra_xusb_shutdown,
2669 .driver = {
2670 .name = "tegra-xusb",
2671 .pm = &tegra_xusb_pm_ops,
2672 .of_match_table = tegra_xusb_of_match,
2673 },
2674};
2675
2676static void tegra_xhci_quirks(struct device *dev, struct xhci_hcd *xhci)
2677{
2678 struct tegra_xusb *tegra = dev_get_drvdata(dev);
2679
2680 if (tegra && tegra->soc->lpm_support)
2681 xhci->quirks |= XHCI_LPM_SUPPORT;
2682}
2683
2684static int tegra_xhci_setup(struct usb_hcd *hcd)
2685{
2686 return xhci_gen_setup(hcd, tegra_xhci_quirks);
2687}
2688
2689static int tegra_xhci_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value, u16 index,
2690 char *buf, u16 length)
2691{
2692 struct tegra_xusb *tegra = dev_get_drvdata(hcd->self.controller);
2693 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
2694 struct xhci_hub *rhub;
2695 struct xhci_bus_state *bus_state;
2696 int port = (index & 0xff) - 1;
2697 unsigned int i;
2698 struct xhci_port **ports;
2699 u32 portsc;
2700 int ret;
2701 struct phy *phy;
2702
2703 rhub = &xhci->usb2_rhub;
2704 bus_state = &rhub->bus_state;
2705 if (bus_state->resuming_ports && hcd->speed == HCD_USB2) {
2706 ports = rhub->ports;
2707 i = rhub->num_ports;
2708 while (i--) {
2709 if (!test_bit(i, &bus_state->resuming_ports))
2710 continue;
2711 portsc = readl(ports[i]->addr);
2712 if ((portsc & PORT_PLS_MASK) == XDEV_RESUME)
2713 tegra_phy_xusb_utmi_pad_power_on(
2714 tegra_xusb_get_phy(tegra, "usb2", (int) i));
2715 }
2716 }
2717
2718 if (hcd->speed == HCD_USB2) {
2719 phy = tegra_xusb_get_phy(tegra, "usb2", port);
2720 if ((type_req == ClearPortFeature) && (value == USB_PORT_FEAT_SUSPEND)) {
2721 if (!index || index > rhub->num_ports)
2722 return -EPIPE;
2723 tegra_phy_xusb_utmi_pad_power_on(phy);
2724 }
2725 if ((type_req == SetPortFeature) && (value == USB_PORT_FEAT_RESET)) {
2726 if (!index || index > rhub->num_ports)
2727 return -EPIPE;
2728 ports = rhub->ports;
2729 portsc = readl(ports[port]->addr);
2730 if (portsc & PORT_CONNECT)
2731 tegra_phy_xusb_utmi_pad_power_on(phy);
2732 }
2733 }
2734
2735 ret = xhci_hub_control(hcd, type_req, value, index, buf, length);
2736 if (ret < 0)
2737 return ret;
2738
2739 if (hcd->speed == HCD_USB2) {
2740 /* Use phy where we set previously */
2741 if ((type_req == SetPortFeature) && (value == USB_PORT_FEAT_SUSPEND))
2742 /* We don't suspend the PAD while HNP role swap happens on the OTG port */
2743 if (!((hcd->self.otg_port == (port + 1)) && hcd->self.b_hnp_enable))
2744 tegra_phy_xusb_utmi_pad_power_down(phy);
2745
2746 if ((type_req == ClearPortFeature) && (value == USB_PORT_FEAT_C_CONNECTION)) {
2747 ports = rhub->ports;
2748 portsc = readl(ports[port]->addr);
2749 if (!(portsc & PORT_CONNECT)) {
2750 /* We don't suspend the PAD while HNP role swap happens on the OTG
2751 * port
2752 */
2753 if (!((hcd->self.otg_port == (port + 1)) && hcd->self.b_hnp_enable))
2754 tegra_phy_xusb_utmi_pad_power_down(phy);
2755 }
2756 }
2757 if ((type_req == SetPortFeature) && (value == USB_PORT_FEAT_TEST))
2758 tegra_phy_xusb_utmi_pad_power_on(phy);
2759 }
2760
2761 return ret;
2762}
2763
2764static const struct xhci_driver_overrides tegra_xhci_overrides __initconst = {
2765 .reset = tegra_xhci_setup,
2766 .hub_control = tegra_xhci_hub_control,
2767};
2768
2769static int __init tegra_xusb_init(void)
2770{
2771 xhci_init_driver(&tegra_xhci_hc_driver, &tegra_xhci_overrides);
2772
2773 return platform_driver_register(&tegra_xusb_driver);
2774}
2775module_init(tegra_xusb_init);
2776
2777static void __exit tegra_xusb_exit(void)
2778{
2779 platform_driver_unregister(&tegra_xusb_driver);
2780}
2781module_exit(tegra_xusb_exit);
2782
2783MODULE_AUTHOR("Andrew Bresticker <abrestic@chromium.org>");
2784MODULE_DESCRIPTION("NVIDIA Tegra XUSB xHCI host-controller driver");
2785MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * NVIDIA Tegra xHCI host controller driver
4 *
5 * Copyright (C) 2014 NVIDIA Corporation
6 * Copyright (C) 2014 Google, Inc.
7 */
8
9#include <linux/clk.h>
10#include <linux/delay.h>
11#include <linux/dma-mapping.h>
12#include <linux/firmware.h>
13#include <linux/interrupt.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/of_device.h>
17#include <linux/phy/phy.h>
18#include <linux/phy/tegra/xusb.h>
19#include <linux/platform_device.h>
20#include <linux/pm.h>
21#include <linux/pm_domain.h>
22#include <linux/pm_runtime.h>
23#include <linux/regulator/consumer.h>
24#include <linux/reset.h>
25#include <linux/slab.h>
26#include <soc/tegra/pmc.h>
27
28#include "xhci.h"
29
30#define TEGRA_XHCI_SS_HIGH_SPEED 120000000
31#define TEGRA_XHCI_SS_LOW_SPEED 12000000
32
33/* FPCI CFG registers */
34#define XUSB_CFG_1 0x004
35#define XUSB_IO_SPACE_EN BIT(0)
36#define XUSB_MEM_SPACE_EN BIT(1)
37#define XUSB_BUS_MASTER_EN BIT(2)
38#define XUSB_CFG_4 0x010
39#define XUSB_BASE_ADDR_SHIFT 15
40#define XUSB_BASE_ADDR_MASK 0x1ffff
41#define XUSB_CFG_ARU_C11_CSBRANGE 0x41c
42#define XUSB_CFG_CSB_BASE_ADDR 0x800
43
44/* FPCI mailbox registers */
45#define XUSB_CFG_ARU_MBOX_CMD 0x0e4
46#define MBOX_DEST_FALC BIT(27)
47#define MBOX_DEST_PME BIT(28)
48#define MBOX_DEST_SMI BIT(29)
49#define MBOX_DEST_XHCI BIT(30)
50#define MBOX_INT_EN BIT(31)
51#define XUSB_CFG_ARU_MBOX_DATA_IN 0x0e8
52#define CMD_DATA_SHIFT 0
53#define CMD_DATA_MASK 0xffffff
54#define CMD_TYPE_SHIFT 24
55#define CMD_TYPE_MASK 0xff
56#define XUSB_CFG_ARU_MBOX_DATA_OUT 0x0ec
57#define XUSB_CFG_ARU_MBOX_OWNER 0x0f0
58#define MBOX_OWNER_NONE 0
59#define MBOX_OWNER_FW 1
60#define MBOX_OWNER_SW 2
61#define XUSB_CFG_ARU_SMI_INTR 0x428
62#define MBOX_SMI_INTR_FW_HANG BIT(1)
63#define MBOX_SMI_INTR_EN BIT(3)
64
65/* IPFS registers */
66#define IPFS_XUSB_HOST_CONFIGURATION_0 0x180
67#define IPFS_EN_FPCI BIT(0)
68#define IPFS_XUSB_HOST_INTR_MASK_0 0x188
69#define IPFS_IP_INT_MASK BIT(16)
70#define IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0 0x1bc
71
72#define CSB_PAGE_SELECT_MASK 0x7fffff
73#define CSB_PAGE_SELECT_SHIFT 9
74#define CSB_PAGE_OFFSET_MASK 0x1ff
75#define CSB_PAGE_SELECT(addr) ((addr) >> (CSB_PAGE_SELECT_SHIFT) & \
76 CSB_PAGE_SELECT_MASK)
77#define CSB_PAGE_OFFSET(addr) ((addr) & CSB_PAGE_OFFSET_MASK)
78
79/* Falcon CSB registers */
80#define XUSB_FALC_CPUCTL 0x100
81#define CPUCTL_STARTCPU BIT(1)
82#define CPUCTL_STATE_HALTED BIT(4)
83#define CPUCTL_STATE_STOPPED BIT(5)
84#define XUSB_FALC_BOOTVEC 0x104
85#define XUSB_FALC_DMACTL 0x10c
86#define XUSB_FALC_IMFILLRNG1 0x154
87#define IMFILLRNG1_TAG_MASK 0xffff
88#define IMFILLRNG1_TAG_LO_SHIFT 0
89#define IMFILLRNG1_TAG_HI_SHIFT 16
90#define XUSB_FALC_IMFILLCTL 0x158
91
92/* MP CSB registers */
93#define XUSB_CSB_MP_ILOAD_ATTR 0x101a00
94#define XUSB_CSB_MP_ILOAD_BASE_LO 0x101a04
95#define XUSB_CSB_MP_ILOAD_BASE_HI 0x101a08
96#define XUSB_CSB_MP_L2IMEMOP_SIZE 0x101a10
97#define L2IMEMOP_SIZE_SRC_OFFSET_SHIFT 8
98#define L2IMEMOP_SIZE_SRC_OFFSET_MASK 0x3ff
99#define L2IMEMOP_SIZE_SRC_COUNT_SHIFT 24
100#define L2IMEMOP_SIZE_SRC_COUNT_MASK 0xff
101#define XUSB_CSB_MP_L2IMEMOP_TRIG 0x101a14
102#define L2IMEMOP_ACTION_SHIFT 24
103#define L2IMEMOP_INVALIDATE_ALL (0x40 << L2IMEMOP_ACTION_SHIFT)
104#define L2IMEMOP_LOAD_LOCKED_RESULT (0x11 << L2IMEMOP_ACTION_SHIFT)
105#define XUSB_CSB_MP_APMAP 0x10181c
106#define APMAP_BOOTPATH BIT(31)
107
108#define IMEM_BLOCK_SIZE 256
109
110struct tegra_xusb_fw_header {
111 __le32 boot_loadaddr_in_imem;
112 __le32 boot_codedfi_offset;
113 __le32 boot_codetag;
114 __le32 boot_codesize;
115 __le32 phys_memaddr;
116 __le16 reqphys_memsize;
117 __le16 alloc_phys_memsize;
118 __le32 rodata_img_offset;
119 __le32 rodata_section_start;
120 __le32 rodata_section_end;
121 __le32 main_fnaddr;
122 __le32 fwimg_cksum;
123 __le32 fwimg_created_time;
124 __le32 imem_resident_start;
125 __le32 imem_resident_end;
126 __le32 idirect_start;
127 __le32 idirect_end;
128 __le32 l2_imem_start;
129 __le32 l2_imem_end;
130 __le32 version_id;
131 u8 init_ddirect;
132 u8 reserved[3];
133 __le32 phys_addr_log_buffer;
134 __le32 total_log_entries;
135 __le32 dequeue_ptr;
136 __le32 dummy_var[2];
137 __le32 fwimg_len;
138 u8 magic[8];
139 __le32 ss_low_power_entry_timeout;
140 u8 num_hsic_port;
141 u8 padding[139]; /* Pad to 256 bytes */
142};
143
144struct tegra_xusb_phy_type {
145 const char *name;
146 unsigned int num;
147};
148
149struct tegra_xusb_soc {
150 const char *firmware;
151 const char * const *supply_names;
152 unsigned int num_supplies;
153 const struct tegra_xusb_phy_type *phy_types;
154 unsigned int num_types;
155
156 struct {
157 struct {
158 unsigned int offset;
159 unsigned int count;
160 } usb2, ulpi, hsic, usb3;
161 } ports;
162
163 bool scale_ss_clock;
164 bool has_ipfs;
165};
166
167struct tegra_xusb {
168 struct device *dev;
169 void __iomem *regs;
170 struct usb_hcd *hcd;
171
172 struct mutex lock;
173
174 int xhci_irq;
175 int mbox_irq;
176
177 void __iomem *ipfs_base;
178 void __iomem *fpci_base;
179
180 const struct tegra_xusb_soc *soc;
181
182 struct regulator_bulk_data *supplies;
183
184 struct tegra_xusb_padctl *padctl;
185
186 struct clk *host_clk;
187 struct clk *falcon_clk;
188 struct clk *ss_clk;
189 struct clk *ss_src_clk;
190 struct clk *hs_src_clk;
191 struct clk *fs_src_clk;
192 struct clk *pll_u_480m;
193 struct clk *clk_m;
194 struct clk *pll_e;
195
196 struct reset_control *host_rst;
197 struct reset_control *ss_rst;
198
199 struct device *genpd_dev_host;
200 struct device *genpd_dev_ss;
201 struct device_link *genpd_dl_host;
202 struct device_link *genpd_dl_ss;
203
204 struct phy **phys;
205 unsigned int num_phys;
206
207 /* Firmware loading related */
208 struct {
209 size_t size;
210 void *virt;
211 dma_addr_t phys;
212 } fw;
213};
214
215static struct hc_driver __read_mostly tegra_xhci_hc_driver;
216
217static inline u32 fpci_readl(struct tegra_xusb *tegra, unsigned int offset)
218{
219 return readl(tegra->fpci_base + offset);
220}
221
222static inline void fpci_writel(struct tegra_xusb *tegra, u32 value,
223 unsigned int offset)
224{
225 writel(value, tegra->fpci_base + offset);
226}
227
228static inline u32 ipfs_readl(struct tegra_xusb *tegra, unsigned int offset)
229{
230 return readl(tegra->ipfs_base + offset);
231}
232
233static inline void ipfs_writel(struct tegra_xusb *tegra, u32 value,
234 unsigned int offset)
235{
236 writel(value, tegra->ipfs_base + offset);
237}
238
239static u32 csb_readl(struct tegra_xusb *tegra, unsigned int offset)
240{
241 u32 page = CSB_PAGE_SELECT(offset);
242 u32 ofs = CSB_PAGE_OFFSET(offset);
243
244 fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE);
245
246 return fpci_readl(tegra, XUSB_CFG_CSB_BASE_ADDR + ofs);
247}
248
249static void csb_writel(struct tegra_xusb *tegra, u32 value,
250 unsigned int offset)
251{
252 u32 page = CSB_PAGE_SELECT(offset);
253 u32 ofs = CSB_PAGE_OFFSET(offset);
254
255 fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE);
256 fpci_writel(tegra, value, XUSB_CFG_CSB_BASE_ADDR + ofs);
257}
258
259static int tegra_xusb_set_ss_clk(struct tegra_xusb *tegra,
260 unsigned long rate)
261{
262 unsigned long new_parent_rate, old_parent_rate;
263 struct clk *clk = tegra->ss_src_clk;
264 unsigned int div;
265 int err;
266
267 if (clk_get_rate(clk) == rate)
268 return 0;
269
270 switch (rate) {
271 case TEGRA_XHCI_SS_HIGH_SPEED:
272 /*
273 * Reparent to PLLU_480M. Set divider first to avoid
274 * overclocking.
275 */
276 old_parent_rate = clk_get_rate(clk_get_parent(clk));
277 new_parent_rate = clk_get_rate(tegra->pll_u_480m);
278 div = new_parent_rate / rate;
279
280 err = clk_set_rate(clk, old_parent_rate / div);
281 if (err)
282 return err;
283
284 err = clk_set_parent(clk, tegra->pll_u_480m);
285 if (err)
286 return err;
287
288 /*
289 * The rate should already be correct, but set it again just
290 * to be sure.
291 */
292 err = clk_set_rate(clk, rate);
293 if (err)
294 return err;
295
296 break;
297
298 case TEGRA_XHCI_SS_LOW_SPEED:
299 /* Reparent to CLK_M */
300 err = clk_set_parent(clk, tegra->clk_m);
301 if (err)
302 return err;
303
304 err = clk_set_rate(clk, rate);
305 if (err)
306 return err;
307
308 break;
309
310 default:
311 dev_err(tegra->dev, "Invalid SS rate: %lu Hz\n", rate);
312 return -EINVAL;
313 }
314
315 if (clk_get_rate(clk) != rate) {
316 dev_err(tegra->dev, "SS clock doesn't match requested rate\n");
317 return -EINVAL;
318 }
319
320 return 0;
321}
322
323static unsigned long extract_field(u32 value, unsigned int start,
324 unsigned int count)
325{
326 return (value >> start) & ((1 << count) - 1);
327}
328
329/* Command requests from the firmware */
330enum tegra_xusb_mbox_cmd {
331 MBOX_CMD_MSG_ENABLED = 1,
332 MBOX_CMD_INC_FALC_CLOCK,
333 MBOX_CMD_DEC_FALC_CLOCK,
334 MBOX_CMD_INC_SSPI_CLOCK,
335 MBOX_CMD_DEC_SSPI_CLOCK,
336 MBOX_CMD_SET_BW, /* no ACK/NAK required */
337 MBOX_CMD_SET_SS_PWR_GATING,
338 MBOX_CMD_SET_SS_PWR_UNGATING,
339 MBOX_CMD_SAVE_DFE_CTLE_CTX,
340 MBOX_CMD_AIRPLANE_MODE_ENABLED, /* unused */
341 MBOX_CMD_AIRPLANE_MODE_DISABLED, /* unused */
342 MBOX_CMD_START_HSIC_IDLE,
343 MBOX_CMD_STOP_HSIC_IDLE,
344 MBOX_CMD_DBC_WAKE_STACK, /* unused */
345 MBOX_CMD_HSIC_PRETEND_CONNECT,
346 MBOX_CMD_RESET_SSPI,
347 MBOX_CMD_DISABLE_SS_LFPS_DETECTION,
348 MBOX_CMD_ENABLE_SS_LFPS_DETECTION,
349
350 MBOX_CMD_MAX,
351
352 /* Response message to above commands */
353 MBOX_CMD_ACK = 128,
354 MBOX_CMD_NAK
355};
356
357struct tegra_xusb_mbox_msg {
358 u32 cmd;
359 u32 data;
360};
361
362static inline u32 tegra_xusb_mbox_pack(const struct tegra_xusb_mbox_msg *msg)
363{
364 return (msg->cmd & CMD_TYPE_MASK) << CMD_TYPE_SHIFT |
365 (msg->data & CMD_DATA_MASK) << CMD_DATA_SHIFT;
366}
367static inline void tegra_xusb_mbox_unpack(struct tegra_xusb_mbox_msg *msg,
368 u32 value)
369{
370 msg->cmd = (value >> CMD_TYPE_SHIFT) & CMD_TYPE_MASK;
371 msg->data = (value >> CMD_DATA_SHIFT) & CMD_DATA_MASK;
372}
373
374static bool tegra_xusb_mbox_cmd_requires_ack(enum tegra_xusb_mbox_cmd cmd)
375{
376 switch (cmd) {
377 case MBOX_CMD_SET_BW:
378 case MBOX_CMD_ACK:
379 case MBOX_CMD_NAK:
380 return false;
381
382 default:
383 return true;
384 }
385}
386
387static int tegra_xusb_mbox_send(struct tegra_xusb *tegra,
388 const struct tegra_xusb_mbox_msg *msg)
389{
390 bool wait_for_idle = false;
391 u32 value;
392
393 /*
394 * Acquire the mailbox. The firmware still owns the mailbox for
395 * ACK/NAK messages.
396 */
397 if (!(msg->cmd == MBOX_CMD_ACK || msg->cmd == MBOX_CMD_NAK)) {
398 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
399 if (value != MBOX_OWNER_NONE) {
400 dev_err(tegra->dev, "mailbox is busy\n");
401 return -EBUSY;
402 }
403
404 fpci_writel(tegra, MBOX_OWNER_SW, XUSB_CFG_ARU_MBOX_OWNER);
405
406 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
407 if (value != MBOX_OWNER_SW) {
408 dev_err(tegra->dev, "failed to acquire mailbox\n");
409 return -EBUSY;
410 }
411
412 wait_for_idle = true;
413 }
414
415 value = tegra_xusb_mbox_pack(msg);
416 fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_DATA_IN);
417
418 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD);
419 value |= MBOX_INT_EN | MBOX_DEST_FALC;
420 fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_CMD);
421
422 if (wait_for_idle) {
423 unsigned long timeout = jiffies + msecs_to_jiffies(250);
424
425 while (time_before(jiffies, timeout)) {
426 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
427 if (value == MBOX_OWNER_NONE)
428 break;
429
430 usleep_range(10, 20);
431 }
432
433 if (time_after(jiffies, timeout))
434 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
435
436 if (value != MBOX_OWNER_NONE)
437 return -ETIMEDOUT;
438 }
439
440 return 0;
441}
442
443static irqreturn_t tegra_xusb_mbox_irq(int irq, void *data)
444{
445 struct tegra_xusb *tegra = data;
446 u32 value;
447
448 /* clear mailbox interrupts */
449 value = fpci_readl(tegra, XUSB_CFG_ARU_SMI_INTR);
450 fpci_writel(tegra, value, XUSB_CFG_ARU_SMI_INTR);
451
452 if (value & MBOX_SMI_INTR_FW_HANG)
453 dev_err(tegra->dev, "controller firmware hang\n");
454
455 return IRQ_WAKE_THREAD;
456}
457
458static void tegra_xusb_mbox_handle(struct tegra_xusb *tegra,
459 const struct tegra_xusb_mbox_msg *msg)
460{
461 struct tegra_xusb_padctl *padctl = tegra->padctl;
462 const struct tegra_xusb_soc *soc = tegra->soc;
463 struct device *dev = tegra->dev;
464 struct tegra_xusb_mbox_msg rsp;
465 unsigned long mask;
466 unsigned int port;
467 bool idle, enable;
468 int err = 0;
469
470 memset(&rsp, 0, sizeof(rsp));
471
472 switch (msg->cmd) {
473 case MBOX_CMD_INC_FALC_CLOCK:
474 case MBOX_CMD_DEC_FALC_CLOCK:
475 rsp.data = clk_get_rate(tegra->falcon_clk) / 1000;
476 if (rsp.data != msg->data)
477 rsp.cmd = MBOX_CMD_NAK;
478 else
479 rsp.cmd = MBOX_CMD_ACK;
480
481 break;
482
483 case MBOX_CMD_INC_SSPI_CLOCK:
484 case MBOX_CMD_DEC_SSPI_CLOCK:
485 if (tegra->soc->scale_ss_clock) {
486 err = tegra_xusb_set_ss_clk(tegra, msg->data * 1000);
487 if (err < 0)
488 rsp.cmd = MBOX_CMD_NAK;
489 else
490 rsp.cmd = MBOX_CMD_ACK;
491
492 rsp.data = clk_get_rate(tegra->ss_src_clk) / 1000;
493 } else {
494 rsp.cmd = MBOX_CMD_ACK;
495 rsp.data = msg->data;
496 }
497
498 break;
499
500 case MBOX_CMD_SET_BW:
501 /*
502 * TODO: Request bandwidth once EMC scaling is supported.
503 * Ignore for now since ACK/NAK is not required for SET_BW
504 * messages.
505 */
506 break;
507
508 case MBOX_CMD_SAVE_DFE_CTLE_CTX:
509 err = tegra_xusb_padctl_usb3_save_context(padctl, msg->data);
510 if (err < 0) {
511 dev_err(dev, "failed to save context for USB3#%u: %d\n",
512 msg->data, err);
513 rsp.cmd = MBOX_CMD_NAK;
514 } else {
515 rsp.cmd = MBOX_CMD_ACK;
516 }
517
518 rsp.data = msg->data;
519 break;
520
521 case MBOX_CMD_START_HSIC_IDLE:
522 case MBOX_CMD_STOP_HSIC_IDLE:
523 if (msg->cmd == MBOX_CMD_STOP_HSIC_IDLE)
524 idle = false;
525 else
526 idle = true;
527
528 mask = extract_field(msg->data, 1 + soc->ports.hsic.offset,
529 soc->ports.hsic.count);
530
531 for_each_set_bit(port, &mask, 32) {
532 err = tegra_xusb_padctl_hsic_set_idle(padctl, port,
533 idle);
534 if (err < 0)
535 break;
536 }
537
538 if (err < 0) {
539 dev_err(dev, "failed to set HSIC#%u %s: %d\n", port,
540 idle ? "idle" : "busy", err);
541 rsp.cmd = MBOX_CMD_NAK;
542 } else {
543 rsp.cmd = MBOX_CMD_ACK;
544 }
545
546 rsp.data = msg->data;
547 break;
548
549 case MBOX_CMD_DISABLE_SS_LFPS_DETECTION:
550 case MBOX_CMD_ENABLE_SS_LFPS_DETECTION:
551 if (msg->cmd == MBOX_CMD_DISABLE_SS_LFPS_DETECTION)
552 enable = false;
553 else
554 enable = true;
555
556 mask = extract_field(msg->data, 1 + soc->ports.usb3.offset,
557 soc->ports.usb3.count);
558
559 for_each_set_bit(port, &mask, soc->ports.usb3.count) {
560 err = tegra_xusb_padctl_usb3_set_lfps_detect(padctl,
561 port,
562 enable);
563 if (err < 0)
564 break;
565 }
566
567 if (err < 0) {
568 dev_err(dev,
569 "failed to %s LFPS detection on USB3#%u: %d\n",
570 enable ? "enable" : "disable", port, err);
571 rsp.cmd = MBOX_CMD_NAK;
572 } else {
573 rsp.cmd = MBOX_CMD_ACK;
574 }
575
576 rsp.data = msg->data;
577 break;
578
579 default:
580 dev_warn(dev, "unknown message: %#x\n", msg->cmd);
581 break;
582 }
583
584 if (rsp.cmd) {
585 const char *cmd = (rsp.cmd == MBOX_CMD_ACK) ? "ACK" : "NAK";
586
587 err = tegra_xusb_mbox_send(tegra, &rsp);
588 if (err < 0)
589 dev_err(dev, "failed to send %s: %d\n", cmd, err);
590 }
591}
592
593static irqreturn_t tegra_xusb_mbox_thread(int irq, void *data)
594{
595 struct tegra_xusb *tegra = data;
596 struct tegra_xusb_mbox_msg msg;
597 u32 value;
598
599 mutex_lock(&tegra->lock);
600
601 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_DATA_OUT);
602 tegra_xusb_mbox_unpack(&msg, value);
603
604 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD);
605 value &= ~MBOX_DEST_SMI;
606 fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_CMD);
607
608 /* clear mailbox owner if no ACK/NAK is required */
609 if (!tegra_xusb_mbox_cmd_requires_ack(msg.cmd))
610 fpci_writel(tegra, MBOX_OWNER_NONE, XUSB_CFG_ARU_MBOX_OWNER);
611
612 tegra_xusb_mbox_handle(tegra, &msg);
613
614 mutex_unlock(&tegra->lock);
615 return IRQ_HANDLED;
616}
617
618static void tegra_xusb_config(struct tegra_xusb *tegra,
619 struct resource *regs)
620{
621 u32 value;
622
623 if (tegra->soc->has_ipfs) {
624 value = ipfs_readl(tegra, IPFS_XUSB_HOST_CONFIGURATION_0);
625 value |= IPFS_EN_FPCI;
626 ipfs_writel(tegra, value, IPFS_XUSB_HOST_CONFIGURATION_0);
627
628 usleep_range(10, 20);
629 }
630
631 /* Program BAR0 space */
632 value = fpci_readl(tegra, XUSB_CFG_4);
633 value &= ~(XUSB_BASE_ADDR_MASK << XUSB_BASE_ADDR_SHIFT);
634 value |= regs->start & (XUSB_BASE_ADDR_MASK << XUSB_BASE_ADDR_SHIFT);
635 fpci_writel(tegra, value, XUSB_CFG_4);
636
637 usleep_range(100, 200);
638
639 /* Enable bus master */
640 value = fpci_readl(tegra, XUSB_CFG_1);
641 value |= XUSB_IO_SPACE_EN | XUSB_MEM_SPACE_EN | XUSB_BUS_MASTER_EN;
642 fpci_writel(tegra, value, XUSB_CFG_1);
643
644 if (tegra->soc->has_ipfs) {
645 /* Enable interrupt assertion */
646 value = ipfs_readl(tegra, IPFS_XUSB_HOST_INTR_MASK_0);
647 value |= IPFS_IP_INT_MASK;
648 ipfs_writel(tegra, value, IPFS_XUSB_HOST_INTR_MASK_0);
649
650 /* Set hysteresis */
651 ipfs_writel(tegra, 0x80, IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0);
652 }
653}
654
655static int tegra_xusb_clk_enable(struct tegra_xusb *tegra)
656{
657 int err;
658
659 err = clk_prepare_enable(tegra->pll_e);
660 if (err < 0)
661 return err;
662
663 err = clk_prepare_enable(tegra->host_clk);
664 if (err < 0)
665 goto disable_plle;
666
667 err = clk_prepare_enable(tegra->ss_clk);
668 if (err < 0)
669 goto disable_host;
670
671 err = clk_prepare_enable(tegra->falcon_clk);
672 if (err < 0)
673 goto disable_ss;
674
675 err = clk_prepare_enable(tegra->fs_src_clk);
676 if (err < 0)
677 goto disable_falc;
678
679 err = clk_prepare_enable(tegra->hs_src_clk);
680 if (err < 0)
681 goto disable_fs_src;
682
683 if (tegra->soc->scale_ss_clock) {
684 err = tegra_xusb_set_ss_clk(tegra, TEGRA_XHCI_SS_HIGH_SPEED);
685 if (err < 0)
686 goto disable_hs_src;
687 }
688
689 return 0;
690
691disable_hs_src:
692 clk_disable_unprepare(tegra->hs_src_clk);
693disable_fs_src:
694 clk_disable_unprepare(tegra->fs_src_clk);
695disable_falc:
696 clk_disable_unprepare(tegra->falcon_clk);
697disable_ss:
698 clk_disable_unprepare(tegra->ss_clk);
699disable_host:
700 clk_disable_unprepare(tegra->host_clk);
701disable_plle:
702 clk_disable_unprepare(tegra->pll_e);
703 return err;
704}
705
706static void tegra_xusb_clk_disable(struct tegra_xusb *tegra)
707{
708 clk_disable_unprepare(tegra->pll_e);
709 clk_disable_unprepare(tegra->host_clk);
710 clk_disable_unprepare(tegra->ss_clk);
711 clk_disable_unprepare(tegra->falcon_clk);
712 clk_disable_unprepare(tegra->fs_src_clk);
713 clk_disable_unprepare(tegra->hs_src_clk);
714}
715
716static int tegra_xusb_phy_enable(struct tegra_xusb *tegra)
717{
718 unsigned int i;
719 int err;
720
721 for (i = 0; i < tegra->num_phys; i++) {
722 err = phy_init(tegra->phys[i]);
723 if (err)
724 goto disable_phy;
725
726 err = phy_power_on(tegra->phys[i]);
727 if (err) {
728 phy_exit(tegra->phys[i]);
729 goto disable_phy;
730 }
731 }
732
733 return 0;
734
735disable_phy:
736 while (i--) {
737 phy_power_off(tegra->phys[i]);
738 phy_exit(tegra->phys[i]);
739 }
740
741 return err;
742}
743
744static void tegra_xusb_phy_disable(struct tegra_xusb *tegra)
745{
746 unsigned int i;
747
748 for (i = 0; i < tegra->num_phys; i++) {
749 phy_power_off(tegra->phys[i]);
750 phy_exit(tegra->phys[i]);
751 }
752}
753
754static int tegra_xusb_runtime_suspend(struct device *dev)
755{
756 struct tegra_xusb *tegra = dev_get_drvdata(dev);
757
758 tegra_xusb_phy_disable(tegra);
759 regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
760 tegra_xusb_clk_disable(tegra);
761
762 return 0;
763}
764
765static int tegra_xusb_runtime_resume(struct device *dev)
766{
767 struct tegra_xusb *tegra = dev_get_drvdata(dev);
768 int err;
769
770 err = tegra_xusb_clk_enable(tegra);
771 if (err) {
772 dev_err(dev, "failed to enable clocks: %d\n", err);
773 return err;
774 }
775
776 err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies);
777 if (err) {
778 dev_err(dev, "failed to enable regulators: %d\n", err);
779 goto disable_clk;
780 }
781
782 err = tegra_xusb_phy_enable(tegra);
783 if (err < 0) {
784 dev_err(dev, "failed to enable PHYs: %d\n", err);
785 goto disable_regulator;
786 }
787
788 return 0;
789
790disable_regulator:
791 regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
792disable_clk:
793 tegra_xusb_clk_disable(tegra);
794 return err;
795}
796
797static int tegra_xusb_load_firmware(struct tegra_xusb *tegra)
798{
799 unsigned int code_tag_blocks, code_size_blocks, code_blocks;
800 struct tegra_xusb_fw_header *header;
801 struct device *dev = tegra->dev;
802 const struct firmware *fw;
803 unsigned long timeout;
804 time64_t timestamp;
805 struct tm time;
806 u64 address;
807 u32 value;
808 int err;
809
810 err = request_firmware(&fw, tegra->soc->firmware, tegra->dev);
811 if (err < 0) {
812 dev_err(tegra->dev, "failed to request firmware: %d\n", err);
813 return err;
814 }
815
816 /* Load Falcon controller with its firmware. */
817 header = (struct tegra_xusb_fw_header *)fw->data;
818 tegra->fw.size = le32_to_cpu(header->fwimg_len);
819
820 tegra->fw.virt = dma_alloc_coherent(tegra->dev, tegra->fw.size,
821 &tegra->fw.phys, GFP_KERNEL);
822 if (!tegra->fw.virt) {
823 dev_err(tegra->dev, "failed to allocate memory for firmware\n");
824 release_firmware(fw);
825 return -ENOMEM;
826 }
827
828 header = (struct tegra_xusb_fw_header *)tegra->fw.virt;
829 memcpy(tegra->fw.virt, fw->data, tegra->fw.size);
830 release_firmware(fw);
831
832 if (csb_readl(tegra, XUSB_CSB_MP_ILOAD_BASE_LO) != 0) {
833 dev_info(dev, "Firmware already loaded, Falcon state %#x\n",
834 csb_readl(tegra, XUSB_FALC_CPUCTL));
835 return 0;
836 }
837
838 /* Program the size of DFI into ILOAD_ATTR. */
839 csb_writel(tegra, tegra->fw.size, XUSB_CSB_MP_ILOAD_ATTR);
840
841 /*
842 * Boot code of the firmware reads the ILOAD_BASE registers
843 * to get to the start of the DFI in system memory.
844 */
845 address = tegra->fw.phys + sizeof(*header);
846 csb_writel(tegra, address >> 32, XUSB_CSB_MP_ILOAD_BASE_HI);
847 csb_writel(tegra, address, XUSB_CSB_MP_ILOAD_BASE_LO);
848
849 /* Set BOOTPATH to 1 in APMAP. */
850 csb_writel(tegra, APMAP_BOOTPATH, XUSB_CSB_MP_APMAP);
851
852 /* Invalidate L2IMEM. */
853 csb_writel(tegra, L2IMEMOP_INVALIDATE_ALL, XUSB_CSB_MP_L2IMEMOP_TRIG);
854
855 /*
856 * Initiate fetch of bootcode from system memory into L2IMEM.
857 * Program bootcode location and size in system memory.
858 */
859 code_tag_blocks = DIV_ROUND_UP(le32_to_cpu(header->boot_codetag),
860 IMEM_BLOCK_SIZE);
861 code_size_blocks = DIV_ROUND_UP(le32_to_cpu(header->boot_codesize),
862 IMEM_BLOCK_SIZE);
863 code_blocks = code_tag_blocks + code_size_blocks;
864
865 value = ((code_tag_blocks & L2IMEMOP_SIZE_SRC_OFFSET_MASK) <<
866 L2IMEMOP_SIZE_SRC_OFFSET_SHIFT) |
867 ((code_size_blocks & L2IMEMOP_SIZE_SRC_COUNT_MASK) <<
868 L2IMEMOP_SIZE_SRC_COUNT_SHIFT);
869 csb_writel(tegra, value, XUSB_CSB_MP_L2IMEMOP_SIZE);
870
871 /* Trigger L2IMEM load operation. */
872 csb_writel(tegra, L2IMEMOP_LOAD_LOCKED_RESULT,
873 XUSB_CSB_MP_L2IMEMOP_TRIG);
874
875 /* Setup Falcon auto-fill. */
876 csb_writel(tegra, code_size_blocks, XUSB_FALC_IMFILLCTL);
877
878 value = ((code_tag_blocks & IMFILLRNG1_TAG_MASK) <<
879 IMFILLRNG1_TAG_LO_SHIFT) |
880 ((code_blocks & IMFILLRNG1_TAG_MASK) <<
881 IMFILLRNG1_TAG_HI_SHIFT);
882 csb_writel(tegra, value, XUSB_FALC_IMFILLRNG1);
883
884 csb_writel(tegra, 0, XUSB_FALC_DMACTL);
885
886 msleep(50);
887
888 csb_writel(tegra, le32_to_cpu(header->boot_codetag),
889 XUSB_FALC_BOOTVEC);
890
891 /* Boot Falcon CPU and wait for it to enter the STOPPED (idle) state. */
892 timeout = jiffies + msecs_to_jiffies(5);
893
894 csb_writel(tegra, CPUCTL_STARTCPU, XUSB_FALC_CPUCTL);
895
896 while (time_before(jiffies, timeout)) {
897 if (csb_readl(tegra, XUSB_FALC_CPUCTL) == CPUCTL_STATE_STOPPED)
898 break;
899
900 usleep_range(100, 200);
901 }
902
903 if (csb_readl(tegra, XUSB_FALC_CPUCTL) != CPUCTL_STATE_STOPPED) {
904 dev_err(dev, "Falcon failed to start, state: %#x\n",
905 csb_readl(tegra, XUSB_FALC_CPUCTL));
906 return -EIO;
907 }
908
909 timestamp = le32_to_cpu(header->fwimg_created_time);
910 time64_to_tm(timestamp, 0, &time);
911
912 dev_info(dev, "Firmware timestamp: %ld-%02d-%02d %02d:%02d:%02d UTC\n",
913 time.tm_year + 1900, time.tm_mon + 1, time.tm_mday,
914 time.tm_hour, time.tm_min, time.tm_sec);
915
916 return 0;
917}
918
919static void tegra_xusb_powerdomain_remove(struct device *dev,
920 struct tegra_xusb *tegra)
921{
922 if (tegra->genpd_dl_ss)
923 device_link_del(tegra->genpd_dl_ss);
924 if (tegra->genpd_dl_host)
925 device_link_del(tegra->genpd_dl_host);
926 if (!IS_ERR_OR_NULL(tegra->genpd_dev_ss))
927 dev_pm_domain_detach(tegra->genpd_dev_ss, true);
928 if (!IS_ERR_OR_NULL(tegra->genpd_dev_host))
929 dev_pm_domain_detach(tegra->genpd_dev_host, true);
930}
931
932static int tegra_xusb_powerdomain_init(struct device *dev,
933 struct tegra_xusb *tegra)
934{
935 int err;
936
937 tegra->genpd_dev_host = dev_pm_domain_attach_by_name(dev, "xusb_host");
938 if (IS_ERR(tegra->genpd_dev_host)) {
939 err = PTR_ERR(tegra->genpd_dev_host);
940 dev_err(dev, "failed to get host pm-domain: %d\n", err);
941 return err;
942 }
943
944 tegra->genpd_dev_ss = dev_pm_domain_attach_by_name(dev, "xusb_ss");
945 if (IS_ERR(tegra->genpd_dev_ss)) {
946 err = PTR_ERR(tegra->genpd_dev_ss);
947 dev_err(dev, "failed to get superspeed pm-domain: %d\n", err);
948 return err;
949 }
950
951 tegra->genpd_dl_host = device_link_add(dev, tegra->genpd_dev_host,
952 DL_FLAG_PM_RUNTIME |
953 DL_FLAG_STATELESS);
954 if (!tegra->genpd_dl_host) {
955 dev_err(dev, "adding host device link failed!\n");
956 return -ENODEV;
957 }
958
959 tegra->genpd_dl_ss = device_link_add(dev, tegra->genpd_dev_ss,
960 DL_FLAG_PM_RUNTIME |
961 DL_FLAG_STATELESS);
962 if (!tegra->genpd_dl_ss) {
963 dev_err(dev, "adding superspeed device link failed!\n");
964 return -ENODEV;
965 }
966
967 return 0;
968}
969
970static int tegra_xusb_probe(struct platform_device *pdev)
971{
972 struct tegra_xusb_mbox_msg msg;
973 struct resource *res, *regs;
974 struct tegra_xusb *tegra;
975 struct xhci_hcd *xhci;
976 unsigned int i, j, k;
977 struct phy *phy;
978 int err;
979
980 BUILD_BUG_ON(sizeof(struct tegra_xusb_fw_header) != 256);
981
982 tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL);
983 if (!tegra)
984 return -ENOMEM;
985
986 tegra->soc = of_device_get_match_data(&pdev->dev);
987 mutex_init(&tegra->lock);
988 tegra->dev = &pdev->dev;
989
990 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
991 tegra->regs = devm_ioremap_resource(&pdev->dev, regs);
992 if (IS_ERR(tegra->regs))
993 return PTR_ERR(tegra->regs);
994
995 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
996 tegra->fpci_base = devm_ioremap_resource(&pdev->dev, res);
997 if (IS_ERR(tegra->fpci_base))
998 return PTR_ERR(tegra->fpci_base);
999
1000 if (tegra->soc->has_ipfs) {
1001 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1002 tegra->ipfs_base = devm_ioremap_resource(&pdev->dev, res);
1003 if (IS_ERR(tegra->ipfs_base))
1004 return PTR_ERR(tegra->ipfs_base);
1005 }
1006
1007 tegra->xhci_irq = platform_get_irq(pdev, 0);
1008 if (tegra->xhci_irq < 0)
1009 return tegra->xhci_irq;
1010
1011 tegra->mbox_irq = platform_get_irq(pdev, 1);
1012 if (tegra->mbox_irq < 0)
1013 return tegra->mbox_irq;
1014
1015 tegra->padctl = tegra_xusb_padctl_get(&pdev->dev);
1016 if (IS_ERR(tegra->padctl))
1017 return PTR_ERR(tegra->padctl);
1018
1019 tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host");
1020 if (IS_ERR(tegra->host_clk)) {
1021 err = PTR_ERR(tegra->host_clk);
1022 dev_err(&pdev->dev, "failed to get xusb_host: %d\n", err);
1023 goto put_padctl;
1024 }
1025
1026 tegra->falcon_clk = devm_clk_get(&pdev->dev, "xusb_falcon_src");
1027 if (IS_ERR(tegra->falcon_clk)) {
1028 err = PTR_ERR(tegra->falcon_clk);
1029 dev_err(&pdev->dev, "failed to get xusb_falcon_src: %d\n", err);
1030 goto put_padctl;
1031 }
1032
1033 tegra->ss_clk = devm_clk_get(&pdev->dev, "xusb_ss");
1034 if (IS_ERR(tegra->ss_clk)) {
1035 err = PTR_ERR(tegra->ss_clk);
1036 dev_err(&pdev->dev, "failed to get xusb_ss: %d\n", err);
1037 goto put_padctl;
1038 }
1039
1040 tegra->ss_src_clk = devm_clk_get(&pdev->dev, "xusb_ss_src");
1041 if (IS_ERR(tegra->ss_src_clk)) {
1042 err = PTR_ERR(tegra->ss_src_clk);
1043 dev_err(&pdev->dev, "failed to get xusb_ss_src: %d\n", err);
1044 goto put_padctl;
1045 }
1046
1047 tegra->hs_src_clk = devm_clk_get(&pdev->dev, "xusb_hs_src");
1048 if (IS_ERR(tegra->hs_src_clk)) {
1049 err = PTR_ERR(tegra->hs_src_clk);
1050 dev_err(&pdev->dev, "failed to get xusb_hs_src: %d\n", err);
1051 goto put_padctl;
1052 }
1053
1054 tegra->fs_src_clk = devm_clk_get(&pdev->dev, "xusb_fs_src");
1055 if (IS_ERR(tegra->fs_src_clk)) {
1056 err = PTR_ERR(tegra->fs_src_clk);
1057 dev_err(&pdev->dev, "failed to get xusb_fs_src: %d\n", err);
1058 goto put_padctl;
1059 }
1060
1061 tegra->pll_u_480m = devm_clk_get(&pdev->dev, "pll_u_480m");
1062 if (IS_ERR(tegra->pll_u_480m)) {
1063 err = PTR_ERR(tegra->pll_u_480m);
1064 dev_err(&pdev->dev, "failed to get pll_u_480m: %d\n", err);
1065 goto put_padctl;
1066 }
1067
1068 tegra->clk_m = devm_clk_get(&pdev->dev, "clk_m");
1069 if (IS_ERR(tegra->clk_m)) {
1070 err = PTR_ERR(tegra->clk_m);
1071 dev_err(&pdev->dev, "failed to get clk_m: %d\n", err);
1072 goto put_padctl;
1073 }
1074
1075 tegra->pll_e = devm_clk_get(&pdev->dev, "pll_e");
1076 if (IS_ERR(tegra->pll_e)) {
1077 err = PTR_ERR(tegra->pll_e);
1078 dev_err(&pdev->dev, "failed to get pll_e: %d\n", err);
1079 goto put_padctl;
1080 }
1081
1082 if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) {
1083 tegra->host_rst = devm_reset_control_get(&pdev->dev,
1084 "xusb_host");
1085 if (IS_ERR(tegra->host_rst)) {
1086 err = PTR_ERR(tegra->host_rst);
1087 dev_err(&pdev->dev,
1088 "failed to get xusb_host reset: %d\n", err);
1089 goto put_padctl;
1090 }
1091
1092 tegra->ss_rst = devm_reset_control_get(&pdev->dev, "xusb_ss");
1093 if (IS_ERR(tegra->ss_rst)) {
1094 err = PTR_ERR(tegra->ss_rst);
1095 dev_err(&pdev->dev, "failed to get xusb_ss reset: %d\n",
1096 err);
1097 goto put_padctl;
1098 }
1099
1100 err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBA,
1101 tegra->ss_clk,
1102 tegra->ss_rst);
1103 if (err) {
1104 dev_err(&pdev->dev,
1105 "failed to enable XUSBA domain: %d\n", err);
1106 goto put_padctl;
1107 }
1108
1109 err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC,
1110 tegra->host_clk,
1111 tegra->host_rst);
1112 if (err) {
1113 tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
1114 dev_err(&pdev->dev,
1115 "failed to enable XUSBC domain: %d\n", err);
1116 goto put_padctl;
1117 }
1118 } else {
1119 err = tegra_xusb_powerdomain_init(&pdev->dev, tegra);
1120 if (err)
1121 goto put_powerdomains;
1122 }
1123
1124 tegra->supplies = devm_kcalloc(&pdev->dev, tegra->soc->num_supplies,
1125 sizeof(*tegra->supplies), GFP_KERNEL);
1126 if (!tegra->supplies) {
1127 err = -ENOMEM;
1128 goto put_powerdomains;
1129 }
1130
1131 for (i = 0; i < tegra->soc->num_supplies; i++)
1132 tegra->supplies[i].supply = tegra->soc->supply_names[i];
1133
1134 err = devm_regulator_bulk_get(&pdev->dev, tegra->soc->num_supplies,
1135 tegra->supplies);
1136 if (err) {
1137 dev_err(&pdev->dev, "failed to get regulators: %d\n", err);
1138 goto put_powerdomains;
1139 }
1140
1141 for (i = 0; i < tegra->soc->num_types; i++)
1142 tegra->num_phys += tegra->soc->phy_types[i].num;
1143
1144 tegra->phys = devm_kcalloc(&pdev->dev, tegra->num_phys,
1145 sizeof(*tegra->phys), GFP_KERNEL);
1146 if (!tegra->phys) {
1147 err = -ENOMEM;
1148 goto put_powerdomains;
1149 }
1150
1151 for (i = 0, k = 0; i < tegra->soc->num_types; i++) {
1152 char prop[8];
1153
1154 for (j = 0; j < tegra->soc->phy_types[i].num; j++) {
1155 snprintf(prop, sizeof(prop), "%s-%d",
1156 tegra->soc->phy_types[i].name, j);
1157
1158 phy = devm_phy_optional_get(&pdev->dev, prop);
1159 if (IS_ERR(phy)) {
1160 dev_err(&pdev->dev,
1161 "failed to get PHY %s: %ld\n", prop,
1162 PTR_ERR(phy));
1163 err = PTR_ERR(phy);
1164 goto put_powerdomains;
1165 }
1166
1167 tegra->phys[k++] = phy;
1168 }
1169 }
1170
1171 tegra->hcd = usb_create_hcd(&tegra_xhci_hc_driver, &pdev->dev,
1172 dev_name(&pdev->dev));
1173 if (!tegra->hcd) {
1174 err = -ENOMEM;
1175 goto put_powerdomains;
1176 }
1177
1178 /*
1179 * This must happen after usb_create_hcd(), because usb_create_hcd()
1180 * will overwrite the drvdata of the device with the hcd it creates.
1181 */
1182 platform_set_drvdata(pdev, tegra);
1183
1184 pm_runtime_enable(&pdev->dev);
1185 if (pm_runtime_enabled(&pdev->dev))
1186 err = pm_runtime_get_sync(&pdev->dev);
1187 else
1188 err = tegra_xusb_runtime_resume(&pdev->dev);
1189
1190 if (err < 0) {
1191 dev_err(&pdev->dev, "failed to enable device: %d\n", err);
1192 goto disable_rpm;
1193 }
1194
1195 tegra_xusb_config(tegra, regs);
1196
1197 /*
1198 * The XUSB Falcon microcontroller can only address 40 bits, so set
1199 * the DMA mask accordingly.
1200 */
1201 err = dma_set_mask_and_coherent(tegra->dev, DMA_BIT_MASK(40));
1202 if (err < 0) {
1203 dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
1204 goto put_rpm;
1205 }
1206
1207 err = tegra_xusb_load_firmware(tegra);
1208 if (err < 0) {
1209 dev_err(&pdev->dev, "failed to load firmware: %d\n", err);
1210 goto put_rpm;
1211 }
1212
1213 tegra->hcd->regs = tegra->regs;
1214 tegra->hcd->rsrc_start = regs->start;
1215 tegra->hcd->rsrc_len = resource_size(regs);
1216
1217 err = usb_add_hcd(tegra->hcd, tegra->xhci_irq, IRQF_SHARED);
1218 if (err < 0) {
1219 dev_err(&pdev->dev, "failed to add USB HCD: %d\n", err);
1220 goto put_rpm;
1221 }
1222
1223 device_wakeup_enable(tegra->hcd->self.controller);
1224
1225 xhci = hcd_to_xhci(tegra->hcd);
1226
1227 xhci->shared_hcd = usb_create_shared_hcd(&tegra_xhci_hc_driver,
1228 &pdev->dev,
1229 dev_name(&pdev->dev),
1230 tegra->hcd);
1231 if (!xhci->shared_hcd) {
1232 dev_err(&pdev->dev, "failed to create shared HCD\n");
1233 err = -ENOMEM;
1234 goto remove_usb2;
1235 }
1236
1237 err = usb_add_hcd(xhci->shared_hcd, tegra->xhci_irq, IRQF_SHARED);
1238 if (err < 0) {
1239 dev_err(&pdev->dev, "failed to add shared HCD: %d\n", err);
1240 goto put_usb3;
1241 }
1242
1243 mutex_lock(&tegra->lock);
1244
1245 /* Enable firmware messages from controller. */
1246 msg.cmd = MBOX_CMD_MSG_ENABLED;
1247 msg.data = 0;
1248
1249 err = tegra_xusb_mbox_send(tegra, &msg);
1250 if (err < 0) {
1251 dev_err(&pdev->dev, "failed to enable messages: %d\n", err);
1252 mutex_unlock(&tegra->lock);
1253 goto remove_usb3;
1254 }
1255
1256 mutex_unlock(&tegra->lock);
1257
1258 err = devm_request_threaded_irq(&pdev->dev, tegra->mbox_irq,
1259 tegra_xusb_mbox_irq,
1260 tegra_xusb_mbox_thread, 0,
1261 dev_name(&pdev->dev), tegra);
1262 if (err < 0) {
1263 dev_err(&pdev->dev, "failed to request IRQ: %d\n", err);
1264 goto remove_usb3;
1265 }
1266
1267 return 0;
1268
1269remove_usb3:
1270 usb_remove_hcd(xhci->shared_hcd);
1271put_usb3:
1272 usb_put_hcd(xhci->shared_hcd);
1273remove_usb2:
1274 usb_remove_hcd(tegra->hcd);
1275put_rpm:
1276 if (!pm_runtime_status_suspended(&pdev->dev))
1277 tegra_xusb_runtime_suspend(&pdev->dev);
1278disable_rpm:
1279 pm_runtime_disable(&pdev->dev);
1280 usb_put_hcd(tegra->hcd);
1281put_powerdomains:
1282 if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) {
1283 tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
1284 tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
1285 } else {
1286 tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
1287 }
1288put_padctl:
1289 tegra_xusb_padctl_put(tegra->padctl);
1290 return err;
1291}
1292
1293static int tegra_xusb_remove(struct platform_device *pdev)
1294{
1295 struct tegra_xusb *tegra = platform_get_drvdata(pdev);
1296 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1297
1298 usb_remove_hcd(xhci->shared_hcd);
1299 usb_put_hcd(xhci->shared_hcd);
1300 xhci->shared_hcd = NULL;
1301 usb_remove_hcd(tegra->hcd);
1302 usb_put_hcd(tegra->hcd);
1303
1304 dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
1305 tegra->fw.phys);
1306
1307 pm_runtime_put_sync(&pdev->dev);
1308 pm_runtime_disable(&pdev->dev);
1309
1310 if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) {
1311 tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
1312 tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
1313 } else {
1314 tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
1315 }
1316
1317 tegra_xusb_padctl_put(tegra->padctl);
1318
1319 return 0;
1320}
1321
1322#ifdef CONFIG_PM_SLEEP
1323static int tegra_xusb_suspend(struct device *dev)
1324{
1325 struct tegra_xusb *tegra = dev_get_drvdata(dev);
1326 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1327 bool wakeup = device_may_wakeup(dev);
1328
1329 /* TODO: Powergate controller across suspend/resume. */
1330 return xhci_suspend(xhci, wakeup);
1331}
1332
1333static int tegra_xusb_resume(struct device *dev)
1334{
1335 struct tegra_xusb *tegra = dev_get_drvdata(dev);
1336 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1337
1338 return xhci_resume(xhci, 0);
1339}
1340#endif
1341
1342static const struct dev_pm_ops tegra_xusb_pm_ops = {
1343 SET_RUNTIME_PM_OPS(tegra_xusb_runtime_suspend,
1344 tegra_xusb_runtime_resume, NULL)
1345 SET_SYSTEM_SLEEP_PM_OPS(tegra_xusb_suspend, tegra_xusb_resume)
1346};
1347
1348static const char * const tegra124_supply_names[] = {
1349 "avddio-pex",
1350 "dvddio-pex",
1351 "avdd-usb",
1352 "avdd-pll-utmip",
1353 "avdd-pll-erefe",
1354 "avdd-usb-ss-pll",
1355 "hvdd-usb-ss",
1356 "hvdd-usb-ss-pll-e",
1357};
1358
1359static const struct tegra_xusb_phy_type tegra124_phy_types[] = {
1360 { .name = "usb3", .num = 2, },
1361 { .name = "usb2", .num = 3, },
1362 { .name = "hsic", .num = 2, },
1363};
1364
1365static const struct tegra_xusb_soc tegra124_soc = {
1366 .firmware = "nvidia/tegra124/xusb.bin",
1367 .supply_names = tegra124_supply_names,
1368 .num_supplies = ARRAY_SIZE(tegra124_supply_names),
1369 .phy_types = tegra124_phy_types,
1370 .num_types = ARRAY_SIZE(tegra124_phy_types),
1371 .ports = {
1372 .usb2 = { .offset = 4, .count = 4, },
1373 .hsic = { .offset = 6, .count = 2, },
1374 .usb3 = { .offset = 0, .count = 2, },
1375 },
1376 .scale_ss_clock = true,
1377 .has_ipfs = true,
1378};
1379MODULE_FIRMWARE("nvidia/tegra124/xusb.bin");
1380
1381static const char * const tegra210_supply_names[] = {
1382 "dvddio-pex",
1383 "hvddio-pex",
1384 "avdd-usb",
1385 "avdd-pll-utmip",
1386 "avdd-pll-uerefe",
1387 "dvdd-pex-pll",
1388 "hvdd-pex-pll-e",
1389};
1390
1391static const struct tegra_xusb_phy_type tegra210_phy_types[] = {
1392 { .name = "usb3", .num = 4, },
1393 { .name = "usb2", .num = 4, },
1394 { .name = "hsic", .num = 1, },
1395};
1396
1397static const struct tegra_xusb_soc tegra210_soc = {
1398 .firmware = "nvidia/tegra210/xusb.bin",
1399 .supply_names = tegra210_supply_names,
1400 .num_supplies = ARRAY_SIZE(tegra210_supply_names),
1401 .phy_types = tegra210_phy_types,
1402 .num_types = ARRAY_SIZE(tegra210_phy_types),
1403 .ports = {
1404 .usb2 = { .offset = 4, .count = 4, },
1405 .hsic = { .offset = 8, .count = 1, },
1406 .usb3 = { .offset = 0, .count = 4, },
1407 },
1408 .scale_ss_clock = false,
1409 .has_ipfs = true,
1410};
1411MODULE_FIRMWARE("nvidia/tegra210/xusb.bin");
1412
1413static const char * const tegra186_supply_names[] = {
1414};
1415
1416static const struct tegra_xusb_phy_type tegra186_phy_types[] = {
1417 { .name = "usb3", .num = 3, },
1418 { .name = "usb2", .num = 3, },
1419 { .name = "hsic", .num = 1, },
1420};
1421
1422static const struct tegra_xusb_soc tegra186_soc = {
1423 .firmware = "nvidia/tegra186/xusb.bin",
1424 .supply_names = tegra186_supply_names,
1425 .num_supplies = ARRAY_SIZE(tegra186_supply_names),
1426 .phy_types = tegra186_phy_types,
1427 .num_types = ARRAY_SIZE(tegra186_phy_types),
1428 .ports = {
1429 .usb3 = { .offset = 0, .count = 3, },
1430 .usb2 = { .offset = 3, .count = 3, },
1431 .hsic = { .offset = 6, .count = 1, },
1432 },
1433 .scale_ss_clock = false,
1434 .has_ipfs = false,
1435};
1436
1437static const struct of_device_id tegra_xusb_of_match[] = {
1438 { .compatible = "nvidia,tegra124-xusb", .data = &tegra124_soc },
1439 { .compatible = "nvidia,tegra210-xusb", .data = &tegra210_soc },
1440 { .compatible = "nvidia,tegra186-xusb", .data = &tegra186_soc },
1441 { },
1442};
1443MODULE_DEVICE_TABLE(of, tegra_xusb_of_match);
1444
1445static struct platform_driver tegra_xusb_driver = {
1446 .probe = tegra_xusb_probe,
1447 .remove = tegra_xusb_remove,
1448 .driver = {
1449 .name = "tegra-xusb",
1450 .pm = &tegra_xusb_pm_ops,
1451 .of_match_table = tegra_xusb_of_match,
1452 },
1453};
1454
1455static void tegra_xhci_quirks(struct device *dev, struct xhci_hcd *xhci)
1456{
1457 xhci->quirks |= XHCI_PLAT;
1458}
1459
1460static int tegra_xhci_setup(struct usb_hcd *hcd)
1461{
1462 return xhci_gen_setup(hcd, tegra_xhci_quirks);
1463}
1464
1465static const struct xhci_driver_overrides tegra_xhci_overrides __initconst = {
1466 .reset = tegra_xhci_setup,
1467};
1468
1469static int __init tegra_xusb_init(void)
1470{
1471 xhci_init_driver(&tegra_xhci_hc_driver, &tegra_xhci_overrides);
1472
1473 return platform_driver_register(&tegra_xusb_driver);
1474}
1475module_init(tegra_xusb_init);
1476
1477static void __exit tegra_xusb_exit(void)
1478{
1479 platform_driver_unregister(&tegra_xusb_driver);
1480}
1481module_exit(tegra_xusb_exit);
1482
1483MODULE_AUTHOR("Andrew Bresticker <abrestic@chromium.org>");
1484MODULE_DESCRIPTION("NVIDIA Tegra XUSB xHCI host-controller driver");
1485MODULE_LICENSE("GPL v2");