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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2010 Google, Inc.
4 * Copyright (C) 2013 NVIDIA Corporation
5 *
6 * Author:
7 * Erik Gilling <konkers@google.com>
8 * Benoit Goby <benoit@android.com>
9 * Venu Byravarasu <vbyravarasu@nvidia.com>
10 */
11
12#include <linux/delay.h>
13#include <linux/err.h>
14#include <linux/export.h>
15#include <linux/gpio/consumer.h>
16#include <linux/iopoll.h>
17#include <linux/module.h>
18#include <linux/of.h>
19#include <linux/of_platform.h>
20#include <linux/platform_device.h>
21#include <linux/resource.h>
22#include <linux/slab.h>
23#include <linux/spinlock.h>
24
25#include <linux/regulator/consumer.h>
26
27#include <linux/usb/ehci_def.h>
28#include <linux/usb/of.h>
29#include <linux/usb/tegra_usb_phy.h>
30#include <linux/usb/ulpi.h>
31
32#define ULPI_VIEWPORT 0x170
33
34/* PORTSC PTS/PHCD bits, Tegra20 only */
35#define TEGRA_USB_PORTSC1 0x184
36#define TEGRA_USB_PORTSC1_PTS(x) (((x) & 0x3) << 30)
37#define TEGRA_USB_PORTSC1_PHCD BIT(23)
38
39/* HOSTPC1 PTS/PHCD bits, Tegra30 and above */
40#define TEGRA_USB_HOSTPC1_DEVLC 0x1b4
41#define TEGRA_USB_HOSTPC1_DEVLC_PTS(x) (((x) & 0x7) << 29)
42#define TEGRA_USB_HOSTPC1_DEVLC_PHCD BIT(22)
43
44/* Bits of PORTSC1, which will get cleared by writing 1 into them */
45#define TEGRA_PORTSC1_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
46
47#define USB_SUSP_CTRL 0x400
48#define USB_WAKE_ON_RESUME_EN BIT(2)
49#define USB_WAKE_ON_CNNT_EN_DEV BIT(3)
50#define USB_WAKE_ON_DISCON_EN_DEV BIT(4)
51#define USB_SUSP_CLR BIT(5)
52#define USB_PHY_CLK_VALID BIT(7)
53#define UTMIP_RESET BIT(11)
54#define UHSIC_RESET BIT(11)
55#define UTMIP_PHY_ENABLE BIT(12)
56#define ULPI_PHY_ENABLE BIT(13)
57#define USB_SUSP_SET BIT(14)
58#define USB_WAKEUP_DEBOUNCE_COUNT(x) (((x) & 0x7) << 16)
59
60#define USB_PHY_VBUS_SENSORS 0x404
61#define B_SESS_VLD_WAKEUP_EN BIT(14)
62#define A_SESS_VLD_WAKEUP_EN BIT(22)
63#define A_VBUS_VLD_WAKEUP_EN BIT(30)
64
65#define USB_PHY_VBUS_WAKEUP_ID 0x408
66#define ID_INT_EN BIT(0)
67#define ID_CHG_DET BIT(1)
68#define VBUS_WAKEUP_INT_EN BIT(8)
69#define VBUS_WAKEUP_CHG_DET BIT(9)
70#define VBUS_WAKEUP_STS BIT(10)
71#define VBUS_WAKEUP_WAKEUP_EN BIT(30)
72
73#define USB1_LEGACY_CTRL 0x410
74#define USB1_NO_LEGACY_MODE BIT(0)
75#define USB1_VBUS_SENSE_CTL_MASK (3 << 1)
76#define USB1_VBUS_SENSE_CTL_VBUS_WAKEUP (0 << 1)
77#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \
78 (1 << 1)
79#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD (2 << 1)
80#define USB1_VBUS_SENSE_CTL_A_SESS_VLD (3 << 1)
81
82#define ULPI_TIMING_CTRL_0 0x424
83#define ULPI_OUTPUT_PINMUX_BYP BIT(10)
84#define ULPI_CLKOUT_PINMUX_BYP BIT(11)
85
86#define ULPI_TIMING_CTRL_1 0x428
87#define ULPI_DATA_TRIMMER_LOAD BIT(0)
88#define ULPI_DATA_TRIMMER_SEL(x) (((x) & 0x7) << 1)
89#define ULPI_STPDIRNXT_TRIMMER_LOAD BIT(16)
90#define ULPI_STPDIRNXT_TRIMMER_SEL(x) (((x) & 0x7) << 17)
91#define ULPI_DIR_TRIMMER_LOAD BIT(24)
92#define ULPI_DIR_TRIMMER_SEL(x) (((x) & 0x7) << 25)
93
94#define UTMIP_PLL_CFG1 0x804
95#define UTMIP_XTAL_FREQ_COUNT(x) (((x) & 0xfff) << 0)
96#define UTMIP_PLLU_ENABLE_DLY_COUNT(x) (((x) & 0x1f) << 27)
97
98#define UTMIP_XCVR_CFG0 0x808
99#define UTMIP_XCVR_SETUP(x) (((x) & 0xf) << 0)
100#define UTMIP_XCVR_SETUP_MSB(x) ((((x) & 0x70) >> 4) << 22)
101#define UTMIP_XCVR_LSRSLEW(x) (((x) & 0x3) << 8)
102#define UTMIP_XCVR_LSFSLEW(x) (((x) & 0x3) << 10)
103#define UTMIP_FORCE_PD_POWERDOWN BIT(14)
104#define UTMIP_FORCE_PD2_POWERDOWN BIT(16)
105#define UTMIP_FORCE_PDZI_POWERDOWN BIT(18)
106#define UTMIP_XCVR_LSBIAS_SEL BIT(21)
107#define UTMIP_XCVR_HSSLEW(x) (((x) & 0x3) << 4)
108#define UTMIP_XCVR_HSSLEW_MSB(x) ((((x) & 0x1fc) >> 2) << 25)
109
110#define UTMIP_BIAS_CFG0 0x80c
111#define UTMIP_OTGPD BIT(11)
112#define UTMIP_BIASPD BIT(10)
113#define UTMIP_HSSQUELCH_LEVEL(x) (((x) & 0x3) << 0)
114#define UTMIP_HSDISCON_LEVEL(x) (((x) & 0x3) << 2)
115#define UTMIP_HSDISCON_LEVEL_MSB(x) ((((x) & 0x4) >> 2) << 24)
116
117#define UTMIP_HSRX_CFG0 0x810
118#define UTMIP_ELASTIC_LIMIT(x) (((x) & 0x1f) << 10)
119#define UTMIP_IDLE_WAIT(x) (((x) & 0x1f) << 15)
120
121#define UTMIP_HSRX_CFG1 0x814
122#define UTMIP_HS_SYNC_START_DLY(x) (((x) & 0x1f) << 1)
123
124#define UTMIP_TX_CFG0 0x820
125#define UTMIP_FS_PREABMLE_J BIT(19)
126#define UTMIP_HS_DISCON_DISABLE BIT(8)
127
128#define UTMIP_MISC_CFG0 0x824
129#define UTMIP_DPDM_OBSERVE BIT(26)
130#define UTMIP_DPDM_OBSERVE_SEL(x) (((x) & 0xf) << 27)
131#define UTMIP_DPDM_OBSERVE_SEL_FS_J UTMIP_DPDM_OBSERVE_SEL(0xf)
132#define UTMIP_DPDM_OBSERVE_SEL_FS_K UTMIP_DPDM_OBSERVE_SEL(0xe)
133#define UTMIP_DPDM_OBSERVE_SEL_FS_SE1 UTMIP_DPDM_OBSERVE_SEL(0xd)
134#define UTMIP_DPDM_OBSERVE_SEL_FS_SE0 UTMIP_DPDM_OBSERVE_SEL(0xc)
135#define UTMIP_SUSPEND_EXIT_ON_EDGE BIT(22)
136
137#define UTMIP_MISC_CFG1 0x828
138#define UTMIP_PLL_ACTIVE_DLY_COUNT(x) (((x) & 0x1f) << 18)
139#define UTMIP_PLLU_STABLE_COUNT(x) (((x) & 0xfff) << 6)
140
141#define UTMIP_DEBOUNCE_CFG0 0x82c
142#define UTMIP_BIAS_DEBOUNCE_A(x) (((x) & 0xffff) << 0)
143
144#define UTMIP_BAT_CHRG_CFG0 0x830
145#define UTMIP_PD_CHRG BIT(0)
146
147#define UTMIP_SPARE_CFG0 0x834
148#define FUSE_SETUP_SEL BIT(3)
149
150#define UTMIP_XCVR_CFG1 0x838
151#define UTMIP_FORCE_PDDISC_POWERDOWN BIT(0)
152#define UTMIP_FORCE_PDCHRP_POWERDOWN BIT(2)
153#define UTMIP_FORCE_PDDR_POWERDOWN BIT(4)
154#define UTMIP_XCVR_TERM_RANGE_ADJ(x) (((x) & 0xf) << 18)
155
156#define UTMIP_BIAS_CFG1 0x83c
157#define UTMIP_BIAS_PDTRK_COUNT(x) (((x) & 0x1f) << 3)
158
159/* For Tegra30 and above only, the address is different in Tegra20 */
160#define USB_USBMODE 0x1f8
161#define USB_USBMODE_MASK (3 << 0)
162#define USB_USBMODE_HOST (3 << 0)
163#define USB_USBMODE_DEVICE (2 << 0)
164
165#define PMC_USB_AO 0xf0
166#define VBUS_WAKEUP_PD_P0 BIT(2)
167#define ID_PD_P0 BIT(3)
168
169static DEFINE_SPINLOCK(utmip_pad_lock);
170static unsigned int utmip_pad_count;
171
172struct tegra_xtal_freq {
173 unsigned int freq;
174 u8 enable_delay;
175 u8 stable_count;
176 u8 active_delay;
177 u8 xtal_freq_count;
178 u16 debounce;
179};
180
181static const struct tegra_xtal_freq tegra_freq_table[] = {
182 {
183 .freq = 12000000,
184 .enable_delay = 0x02,
185 .stable_count = 0x2F,
186 .active_delay = 0x04,
187 .xtal_freq_count = 0x76,
188 .debounce = 0x7530,
189 },
190 {
191 .freq = 13000000,
192 .enable_delay = 0x02,
193 .stable_count = 0x33,
194 .active_delay = 0x05,
195 .xtal_freq_count = 0x7F,
196 .debounce = 0x7EF4,
197 },
198 {
199 .freq = 19200000,
200 .enable_delay = 0x03,
201 .stable_count = 0x4B,
202 .active_delay = 0x06,
203 .xtal_freq_count = 0xBB,
204 .debounce = 0xBB80,
205 },
206 {
207 .freq = 26000000,
208 .enable_delay = 0x04,
209 .stable_count = 0x66,
210 .active_delay = 0x09,
211 .xtal_freq_count = 0xFE,
212 .debounce = 0xFDE8,
213 },
214};
215
216static inline struct tegra_usb_phy *to_tegra_usb_phy(struct usb_phy *u_phy)
217{
218 return container_of(u_phy, struct tegra_usb_phy, u_phy);
219}
220
221static void set_pts(struct tegra_usb_phy *phy, u8 pts_val)
222{
223 void __iomem *base = phy->regs;
224 u32 val;
225
226 if (phy->soc_config->has_hostpc) {
227 val = readl_relaxed(base + TEGRA_USB_HOSTPC1_DEVLC);
228 val &= ~TEGRA_USB_HOSTPC1_DEVLC_PTS(~0);
229 val |= TEGRA_USB_HOSTPC1_DEVLC_PTS(pts_val);
230 writel_relaxed(val, base + TEGRA_USB_HOSTPC1_DEVLC);
231 } else {
232 val = readl_relaxed(base + TEGRA_USB_PORTSC1);
233 val &= ~TEGRA_PORTSC1_RWC_BITS;
234 val &= ~TEGRA_USB_PORTSC1_PTS(~0);
235 val |= TEGRA_USB_PORTSC1_PTS(pts_val);
236 writel_relaxed(val, base + TEGRA_USB_PORTSC1);
237 }
238}
239
240static void set_phcd(struct tegra_usb_phy *phy, bool enable)
241{
242 void __iomem *base = phy->regs;
243 u32 val;
244
245 if (phy->soc_config->has_hostpc) {
246 val = readl_relaxed(base + TEGRA_USB_HOSTPC1_DEVLC);
247 if (enable)
248 val |= TEGRA_USB_HOSTPC1_DEVLC_PHCD;
249 else
250 val &= ~TEGRA_USB_HOSTPC1_DEVLC_PHCD;
251 writel_relaxed(val, base + TEGRA_USB_HOSTPC1_DEVLC);
252 } else {
253 val = readl_relaxed(base + TEGRA_USB_PORTSC1) & ~PORT_RWC_BITS;
254 if (enable)
255 val |= TEGRA_USB_PORTSC1_PHCD;
256 else
257 val &= ~TEGRA_USB_PORTSC1_PHCD;
258 writel_relaxed(val, base + TEGRA_USB_PORTSC1);
259 }
260}
261
262static int utmip_pad_open(struct tegra_usb_phy *phy)
263{
264 int ret;
265
266 ret = clk_prepare_enable(phy->pad_clk);
267 if (ret) {
268 dev_err(phy->u_phy.dev,
269 "Failed to enable UTMI-pads clock: %d\n", ret);
270 return ret;
271 }
272
273 spin_lock(&utmip_pad_lock);
274
275 ret = reset_control_deassert(phy->pad_rst);
276 if (ret) {
277 dev_err(phy->u_phy.dev,
278 "Failed to initialize UTMI-pads reset: %d\n", ret);
279 goto unlock;
280 }
281
282 ret = reset_control_assert(phy->pad_rst);
283 if (ret) {
284 dev_err(phy->u_phy.dev,
285 "Failed to assert UTMI-pads reset: %d\n", ret);
286 goto unlock;
287 }
288
289 udelay(1);
290
291 ret = reset_control_deassert(phy->pad_rst);
292 if (ret)
293 dev_err(phy->u_phy.dev,
294 "Failed to deassert UTMI-pads reset: %d\n", ret);
295unlock:
296 spin_unlock(&utmip_pad_lock);
297
298 clk_disable_unprepare(phy->pad_clk);
299
300 return ret;
301}
302
303static int utmip_pad_close(struct tegra_usb_phy *phy)
304{
305 int ret;
306
307 ret = clk_prepare_enable(phy->pad_clk);
308 if (ret) {
309 dev_err(phy->u_phy.dev,
310 "Failed to enable UTMI-pads clock: %d\n", ret);
311 return ret;
312 }
313
314 ret = reset_control_assert(phy->pad_rst);
315 if (ret)
316 dev_err(phy->u_phy.dev,
317 "Failed to assert UTMI-pads reset: %d\n", ret);
318
319 udelay(1);
320
321 clk_disable_unprepare(phy->pad_clk);
322
323 return ret;
324}
325
326static int utmip_pad_power_on(struct tegra_usb_phy *phy)
327{
328 struct tegra_utmip_config *config = phy->config;
329 void __iomem *base = phy->pad_regs;
330 u32 val;
331 int err;
332
333 err = clk_prepare_enable(phy->pad_clk);
334 if (err)
335 return err;
336
337 spin_lock(&utmip_pad_lock);
338
339 if (utmip_pad_count++ == 0) {
340 val = readl_relaxed(base + UTMIP_BIAS_CFG0);
341 val &= ~(UTMIP_OTGPD | UTMIP_BIASPD);
342
343 if (phy->soc_config->requires_extra_tuning_parameters) {
344 val &= ~(UTMIP_HSSQUELCH_LEVEL(~0) |
345 UTMIP_HSDISCON_LEVEL(~0) |
346 UTMIP_HSDISCON_LEVEL_MSB(~0));
347
348 val |= UTMIP_HSSQUELCH_LEVEL(config->hssquelch_level);
349 val |= UTMIP_HSDISCON_LEVEL(config->hsdiscon_level);
350 val |= UTMIP_HSDISCON_LEVEL_MSB(config->hsdiscon_level);
351 }
352 writel_relaxed(val, base + UTMIP_BIAS_CFG0);
353 }
354
355 if (phy->pad_wakeup) {
356 phy->pad_wakeup = false;
357 utmip_pad_count--;
358 }
359
360 spin_unlock(&utmip_pad_lock);
361
362 clk_disable_unprepare(phy->pad_clk);
363
364 return 0;
365}
366
367static int utmip_pad_power_off(struct tegra_usb_phy *phy)
368{
369 void __iomem *base = phy->pad_regs;
370 u32 val;
371 int ret;
372
373 ret = clk_prepare_enable(phy->pad_clk);
374 if (ret)
375 return ret;
376
377 spin_lock(&utmip_pad_lock);
378
379 if (!utmip_pad_count) {
380 dev_err(phy->u_phy.dev, "UTMIP pad already powered off\n");
381 ret = -EINVAL;
382 goto ulock;
383 }
384
385 /*
386 * In accordance to TRM, OTG and Bias pad circuits could be turned off
387 * to save power if wake is enabled, but the VBUS-change detection
388 * method is board-specific and these circuits may need to be enabled
389 * to generate wakeup event, hence we will just keep them both enabled.
390 */
391 if (phy->wakeup_enabled) {
392 phy->pad_wakeup = true;
393 utmip_pad_count++;
394 }
395
396 if (--utmip_pad_count == 0) {
397 val = readl_relaxed(base + UTMIP_BIAS_CFG0);
398 val |= UTMIP_OTGPD | UTMIP_BIASPD;
399 writel_relaxed(val, base + UTMIP_BIAS_CFG0);
400 }
401ulock:
402 spin_unlock(&utmip_pad_lock);
403
404 clk_disable_unprepare(phy->pad_clk);
405
406 return ret;
407}
408
409static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
410{
411 u32 tmp;
412
413 return readl_relaxed_poll_timeout(reg, tmp, (tmp & mask) == result,
414 2000, 6000);
415}
416
417static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
418{
419 void __iomem *base = phy->regs;
420 u32 val;
421
422 /*
423 * The USB driver may have already initiated the phy clock
424 * disable so wait to see if the clock turns off and if not
425 * then proceed with gating the clock.
426 */
427 if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) == 0)
428 return;
429
430 if (phy->is_legacy_phy) {
431 val = readl_relaxed(base + USB_SUSP_CTRL);
432 val |= USB_SUSP_SET;
433 writel_relaxed(val, base + USB_SUSP_CTRL);
434
435 usleep_range(10, 100);
436
437 val = readl_relaxed(base + USB_SUSP_CTRL);
438 val &= ~USB_SUSP_SET;
439 writel_relaxed(val, base + USB_SUSP_CTRL);
440 } else {
441 set_phcd(phy, true);
442 }
443
444 if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0))
445 dev_err(phy->u_phy.dev,
446 "Timeout waiting for PHY to stabilize on disable\n");
447}
448
449static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
450{
451 void __iomem *base = phy->regs;
452 u32 val;
453
454 /*
455 * The USB driver may have already initiated the phy clock
456 * enable so wait to see if the clock turns on and if not
457 * then proceed with ungating the clock.
458 */
459 if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID,
460 USB_PHY_CLK_VALID) == 0)
461 return;
462
463 if (phy->is_legacy_phy) {
464 val = readl_relaxed(base + USB_SUSP_CTRL);
465 val |= USB_SUSP_CLR;
466 writel_relaxed(val, base + USB_SUSP_CTRL);
467
468 usleep_range(10, 100);
469
470 val = readl_relaxed(base + USB_SUSP_CTRL);
471 val &= ~USB_SUSP_CLR;
472 writel_relaxed(val, base + USB_SUSP_CTRL);
473 } else {
474 set_phcd(phy, false);
475 }
476
477 if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID,
478 USB_PHY_CLK_VALID))
479 dev_err(phy->u_phy.dev,
480 "Timeout waiting for PHY to stabilize on enable\n");
481}
482
483static int utmi_phy_power_on(struct tegra_usb_phy *phy)
484{
485 struct tegra_utmip_config *config = phy->config;
486 void __iomem *base = phy->regs;
487 u32 val;
488 int err;
489
490 val = readl_relaxed(base + USB_SUSP_CTRL);
491 val |= UTMIP_RESET;
492 writel_relaxed(val, base + USB_SUSP_CTRL);
493
494 if (phy->is_legacy_phy) {
495 val = readl_relaxed(base + USB1_LEGACY_CTRL);
496 val |= USB1_NO_LEGACY_MODE;
497 writel_relaxed(val, base + USB1_LEGACY_CTRL);
498 }
499
500 val = readl_relaxed(base + UTMIP_TX_CFG0);
501 val |= UTMIP_FS_PREABMLE_J;
502 writel_relaxed(val, base + UTMIP_TX_CFG0);
503
504 val = readl_relaxed(base + UTMIP_HSRX_CFG0);
505 val &= ~(UTMIP_IDLE_WAIT(~0) | UTMIP_ELASTIC_LIMIT(~0));
506 val |= UTMIP_IDLE_WAIT(config->idle_wait_delay);
507 val |= UTMIP_ELASTIC_LIMIT(config->elastic_limit);
508 writel_relaxed(val, base + UTMIP_HSRX_CFG0);
509
510 val = readl_relaxed(base + UTMIP_HSRX_CFG1);
511 val &= ~UTMIP_HS_SYNC_START_DLY(~0);
512 val |= UTMIP_HS_SYNC_START_DLY(config->hssync_start_delay);
513 writel_relaxed(val, base + UTMIP_HSRX_CFG1);
514
515 val = readl_relaxed(base + UTMIP_DEBOUNCE_CFG0);
516 val &= ~UTMIP_BIAS_DEBOUNCE_A(~0);
517 val |= UTMIP_BIAS_DEBOUNCE_A(phy->freq->debounce);
518 writel_relaxed(val, base + UTMIP_DEBOUNCE_CFG0);
519
520 val = readl_relaxed(base + UTMIP_MISC_CFG0);
521 val &= ~UTMIP_SUSPEND_EXIT_ON_EDGE;
522 writel_relaxed(val, base + UTMIP_MISC_CFG0);
523
524 if (!phy->soc_config->utmi_pll_config_in_car_module) {
525 val = readl_relaxed(base + UTMIP_MISC_CFG1);
526 val &= ~(UTMIP_PLL_ACTIVE_DLY_COUNT(~0) |
527 UTMIP_PLLU_STABLE_COUNT(~0));
528 val |= UTMIP_PLL_ACTIVE_DLY_COUNT(phy->freq->active_delay) |
529 UTMIP_PLLU_STABLE_COUNT(phy->freq->stable_count);
530 writel_relaxed(val, base + UTMIP_MISC_CFG1);
531
532 val = readl_relaxed(base + UTMIP_PLL_CFG1);
533 val &= ~(UTMIP_XTAL_FREQ_COUNT(~0) |
534 UTMIP_PLLU_ENABLE_DLY_COUNT(~0));
535 val |= UTMIP_XTAL_FREQ_COUNT(phy->freq->xtal_freq_count) |
536 UTMIP_PLLU_ENABLE_DLY_COUNT(phy->freq->enable_delay);
537 writel_relaxed(val, base + UTMIP_PLL_CFG1);
538 }
539
540 val = readl_relaxed(base + USB_SUSP_CTRL);
541 val &= ~USB_WAKE_ON_RESUME_EN;
542 writel_relaxed(val, base + USB_SUSP_CTRL);
543
544 if (phy->mode != USB_DR_MODE_HOST) {
545 val = readl_relaxed(base + USB_SUSP_CTRL);
546 val &= ~(USB_WAKE_ON_CNNT_EN_DEV | USB_WAKE_ON_DISCON_EN_DEV);
547 writel_relaxed(val, base + USB_SUSP_CTRL);
548
549 val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
550 val &= ~VBUS_WAKEUP_WAKEUP_EN;
551 val &= ~(ID_CHG_DET | VBUS_WAKEUP_CHG_DET);
552 writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
553
554 val = readl_relaxed(base + USB_PHY_VBUS_SENSORS);
555 val &= ~(A_VBUS_VLD_WAKEUP_EN | A_SESS_VLD_WAKEUP_EN);
556 val &= ~(B_SESS_VLD_WAKEUP_EN);
557 writel_relaxed(val, base + USB_PHY_VBUS_SENSORS);
558
559 val = readl_relaxed(base + UTMIP_BAT_CHRG_CFG0);
560 val &= ~UTMIP_PD_CHRG;
561 writel_relaxed(val, base + UTMIP_BAT_CHRG_CFG0);
562 } else {
563 val = readl_relaxed(base + UTMIP_BAT_CHRG_CFG0);
564 val |= UTMIP_PD_CHRG;
565 writel_relaxed(val, base + UTMIP_BAT_CHRG_CFG0);
566 }
567
568 err = utmip_pad_power_on(phy);
569 if (err)
570 return err;
571
572 val = readl_relaxed(base + UTMIP_XCVR_CFG0);
573 val &= ~(UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
574 UTMIP_FORCE_PDZI_POWERDOWN | UTMIP_XCVR_LSBIAS_SEL |
575 UTMIP_XCVR_SETUP(~0) | UTMIP_XCVR_SETUP_MSB(~0) |
576 UTMIP_XCVR_LSFSLEW(~0) | UTMIP_XCVR_LSRSLEW(~0));
577
578 if (!config->xcvr_setup_use_fuses) {
579 val |= UTMIP_XCVR_SETUP(config->xcvr_setup);
580 val |= UTMIP_XCVR_SETUP_MSB(config->xcvr_setup);
581 }
582 val |= UTMIP_XCVR_LSFSLEW(config->xcvr_lsfslew);
583 val |= UTMIP_XCVR_LSRSLEW(config->xcvr_lsrslew);
584
585 if (phy->soc_config->requires_extra_tuning_parameters) {
586 val &= ~(UTMIP_XCVR_HSSLEW(~0) | UTMIP_XCVR_HSSLEW_MSB(~0));
587 val |= UTMIP_XCVR_HSSLEW(config->xcvr_hsslew);
588 val |= UTMIP_XCVR_HSSLEW_MSB(config->xcvr_hsslew);
589 }
590 writel_relaxed(val, base + UTMIP_XCVR_CFG0);
591
592 val = readl_relaxed(base + UTMIP_XCVR_CFG1);
593 val &= ~(UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
594 UTMIP_FORCE_PDDR_POWERDOWN | UTMIP_XCVR_TERM_RANGE_ADJ(~0));
595 val |= UTMIP_XCVR_TERM_RANGE_ADJ(config->term_range_adj);
596 writel_relaxed(val, base + UTMIP_XCVR_CFG1);
597
598 val = readl_relaxed(base + UTMIP_BIAS_CFG1);
599 val &= ~UTMIP_BIAS_PDTRK_COUNT(~0);
600 val |= UTMIP_BIAS_PDTRK_COUNT(0x5);
601 writel_relaxed(val, base + UTMIP_BIAS_CFG1);
602
603 val = readl_relaxed(base + UTMIP_SPARE_CFG0);
604 if (config->xcvr_setup_use_fuses)
605 val |= FUSE_SETUP_SEL;
606 else
607 val &= ~FUSE_SETUP_SEL;
608 writel_relaxed(val, base + UTMIP_SPARE_CFG0);
609
610 if (!phy->is_legacy_phy) {
611 val = readl_relaxed(base + USB_SUSP_CTRL);
612 val |= UTMIP_PHY_ENABLE;
613 writel_relaxed(val, base + USB_SUSP_CTRL);
614 }
615
616 val = readl_relaxed(base + USB_SUSP_CTRL);
617 val &= ~UTMIP_RESET;
618 writel_relaxed(val, base + USB_SUSP_CTRL);
619
620 if (phy->is_legacy_phy) {
621 val = readl_relaxed(base + USB1_LEGACY_CTRL);
622 val &= ~USB1_VBUS_SENSE_CTL_MASK;
623 val |= USB1_VBUS_SENSE_CTL_A_SESS_VLD;
624 writel_relaxed(val, base + USB1_LEGACY_CTRL);
625
626 val = readl_relaxed(base + USB_SUSP_CTRL);
627 val &= ~USB_SUSP_SET;
628 writel_relaxed(val, base + USB_SUSP_CTRL);
629 }
630
631 utmi_phy_clk_enable(phy);
632
633 if (phy->soc_config->requires_usbmode_setup) {
634 val = readl_relaxed(base + USB_USBMODE);
635 val &= ~USB_USBMODE_MASK;
636 if (phy->mode == USB_DR_MODE_HOST)
637 val |= USB_USBMODE_HOST;
638 else
639 val |= USB_USBMODE_DEVICE;
640 writel_relaxed(val, base + USB_USBMODE);
641 }
642
643 if (!phy->is_legacy_phy)
644 set_pts(phy, 0);
645
646 return 0;
647}
648
649static int utmi_phy_power_off(struct tegra_usb_phy *phy)
650{
651 void __iomem *base = phy->regs;
652 u32 val;
653
654 /*
655 * Give hardware time to settle down after VBUS disconnection,
656 * otherwise PHY will immediately wake up from suspend.
657 */
658 if (phy->wakeup_enabled && phy->mode != USB_DR_MODE_HOST)
659 readl_relaxed_poll_timeout(base + USB_PHY_VBUS_WAKEUP_ID,
660 val, !(val & VBUS_WAKEUP_STS),
661 5000, 100000);
662
663 utmi_phy_clk_disable(phy);
664
665 /* PHY won't resume if reset is asserted */
666 if (!phy->wakeup_enabled) {
667 val = readl_relaxed(base + USB_SUSP_CTRL);
668 val |= UTMIP_RESET;
669 writel_relaxed(val, base + USB_SUSP_CTRL);
670 }
671
672 val = readl_relaxed(base + UTMIP_BAT_CHRG_CFG0);
673 val |= UTMIP_PD_CHRG;
674 writel_relaxed(val, base + UTMIP_BAT_CHRG_CFG0);
675
676 if (!phy->wakeup_enabled) {
677 val = readl_relaxed(base + UTMIP_XCVR_CFG0);
678 val |= UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
679 UTMIP_FORCE_PDZI_POWERDOWN;
680 writel_relaxed(val, base + UTMIP_XCVR_CFG0);
681 }
682
683 val = readl_relaxed(base + UTMIP_XCVR_CFG1);
684 val |= UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
685 UTMIP_FORCE_PDDR_POWERDOWN;
686 writel_relaxed(val, base + UTMIP_XCVR_CFG1);
687
688 if (phy->wakeup_enabled) {
689 val = readl_relaxed(base + USB_SUSP_CTRL);
690 val &= ~USB_WAKEUP_DEBOUNCE_COUNT(~0);
691 val |= USB_WAKEUP_DEBOUNCE_COUNT(5);
692 val |= USB_WAKE_ON_RESUME_EN;
693 writel_relaxed(val, base + USB_SUSP_CTRL);
694
695 /*
696 * Ask VBUS sensor to generate wake event once cable is
697 * connected.
698 */
699 if (phy->mode != USB_DR_MODE_HOST) {
700 val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
701 val |= VBUS_WAKEUP_WAKEUP_EN;
702 val &= ~(ID_CHG_DET | VBUS_WAKEUP_CHG_DET);
703 writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
704
705 val = readl_relaxed(base + USB_PHY_VBUS_SENSORS);
706 val |= A_VBUS_VLD_WAKEUP_EN;
707 writel_relaxed(val, base + USB_PHY_VBUS_SENSORS);
708 }
709 }
710
711 return utmip_pad_power_off(phy);
712}
713
714static void utmi_phy_preresume(struct tegra_usb_phy *phy)
715{
716 void __iomem *base = phy->regs;
717 u32 val;
718
719 val = readl_relaxed(base + UTMIP_TX_CFG0);
720 val |= UTMIP_HS_DISCON_DISABLE;
721 writel_relaxed(val, base + UTMIP_TX_CFG0);
722}
723
724static void utmi_phy_postresume(struct tegra_usb_phy *phy)
725{
726 void __iomem *base = phy->regs;
727 u32 val;
728
729 val = readl_relaxed(base + UTMIP_TX_CFG0);
730 val &= ~UTMIP_HS_DISCON_DISABLE;
731 writel_relaxed(val, base + UTMIP_TX_CFG0);
732}
733
734static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
735 enum tegra_usb_phy_port_speed port_speed)
736{
737 void __iomem *base = phy->regs;
738 u32 val;
739
740 val = readl_relaxed(base + UTMIP_MISC_CFG0);
741 val &= ~UTMIP_DPDM_OBSERVE_SEL(~0);
742 if (port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW)
743 val |= UTMIP_DPDM_OBSERVE_SEL_FS_K;
744 else
745 val |= UTMIP_DPDM_OBSERVE_SEL_FS_J;
746 writel_relaxed(val, base + UTMIP_MISC_CFG0);
747 usleep_range(1, 10);
748
749 val = readl_relaxed(base + UTMIP_MISC_CFG0);
750 val |= UTMIP_DPDM_OBSERVE;
751 writel_relaxed(val, base + UTMIP_MISC_CFG0);
752 usleep_range(10, 100);
753}
754
755static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
756{
757 void __iomem *base = phy->regs;
758 u32 val;
759
760 val = readl_relaxed(base + UTMIP_MISC_CFG0);
761 val &= ~UTMIP_DPDM_OBSERVE;
762 writel_relaxed(val, base + UTMIP_MISC_CFG0);
763 usleep_range(10, 100);
764}
765
766static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
767{
768 void __iomem *base = phy->regs;
769 u32 val;
770 int err;
771
772 gpiod_set_value_cansleep(phy->reset_gpio, 1);
773
774 err = clk_prepare_enable(phy->clk);
775 if (err)
776 return err;
777
778 usleep_range(5000, 6000);
779
780 gpiod_set_value_cansleep(phy->reset_gpio, 0);
781
782 usleep_range(1000, 2000);
783
784 val = readl_relaxed(base + USB_SUSP_CTRL);
785 val |= UHSIC_RESET;
786 writel_relaxed(val, base + USB_SUSP_CTRL);
787
788 val = readl_relaxed(base + ULPI_TIMING_CTRL_0);
789 val |= ULPI_OUTPUT_PINMUX_BYP | ULPI_CLKOUT_PINMUX_BYP;
790 writel_relaxed(val, base + ULPI_TIMING_CTRL_0);
791
792 val = readl_relaxed(base + USB_SUSP_CTRL);
793 val |= ULPI_PHY_ENABLE;
794 writel_relaxed(val, base + USB_SUSP_CTRL);
795
796 val = 0;
797 writel_relaxed(val, base + ULPI_TIMING_CTRL_1);
798
799 val |= ULPI_DATA_TRIMMER_SEL(4);
800 val |= ULPI_STPDIRNXT_TRIMMER_SEL(4);
801 val |= ULPI_DIR_TRIMMER_SEL(4);
802 writel_relaxed(val, base + ULPI_TIMING_CTRL_1);
803 usleep_range(10, 100);
804
805 val |= ULPI_DATA_TRIMMER_LOAD;
806 val |= ULPI_STPDIRNXT_TRIMMER_LOAD;
807 val |= ULPI_DIR_TRIMMER_LOAD;
808 writel_relaxed(val, base + ULPI_TIMING_CTRL_1);
809
810 /* Fix VbusInvalid due to floating VBUS */
811 err = usb_phy_io_write(phy->ulpi, 0x40, 0x08);
812 if (err) {
813 dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", err);
814 goto disable_clk;
815 }
816
817 err = usb_phy_io_write(phy->ulpi, 0x80, 0x0B);
818 if (err) {
819 dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", err);
820 goto disable_clk;
821 }
822
823 val = readl_relaxed(base + USB_SUSP_CTRL);
824 val |= USB_SUSP_CLR;
825 writel_relaxed(val, base + USB_SUSP_CTRL);
826 usleep_range(100, 1000);
827
828 val = readl_relaxed(base + USB_SUSP_CTRL);
829 val &= ~USB_SUSP_CLR;
830 writel_relaxed(val, base + USB_SUSP_CTRL);
831
832 return 0;
833
834disable_clk:
835 clk_disable_unprepare(phy->clk);
836
837 return err;
838}
839
840static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
841{
842 gpiod_set_value_cansleep(phy->reset_gpio, 1);
843 usleep_range(5000, 6000);
844 clk_disable_unprepare(phy->clk);
845
846 /*
847 * Wakeup currently unimplemented for ULPI, thus PHY needs to be
848 * force-resumed.
849 */
850 if (WARN_ON_ONCE(phy->wakeup_enabled)) {
851 ulpi_phy_power_on(phy);
852 return -EOPNOTSUPP;
853 }
854
855 return 0;
856}
857
858static int tegra_usb_phy_power_on(struct tegra_usb_phy *phy)
859{
860 int err;
861
862 if (phy->powered_on)
863 return 0;
864
865 if (phy->is_ulpi_phy)
866 err = ulpi_phy_power_on(phy);
867 else
868 err = utmi_phy_power_on(phy);
869 if (err)
870 return err;
871
872 phy->powered_on = true;
873
874 /* Let PHY settle down */
875 usleep_range(2000, 2500);
876
877 return 0;
878}
879
880static int tegra_usb_phy_power_off(struct tegra_usb_phy *phy)
881{
882 int err;
883
884 if (!phy->powered_on)
885 return 0;
886
887 if (phy->is_ulpi_phy)
888 err = ulpi_phy_power_off(phy);
889 else
890 err = utmi_phy_power_off(phy);
891 if (err)
892 return err;
893
894 phy->powered_on = false;
895
896 return 0;
897}
898
899static void tegra_usb_phy_shutdown(struct usb_phy *u_phy)
900{
901 struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
902
903 if (WARN_ON(!phy->freq))
904 return;
905
906 usb_phy_set_wakeup(u_phy, false);
907 tegra_usb_phy_power_off(phy);
908
909 if (!phy->is_ulpi_phy)
910 utmip_pad_close(phy);
911
912 regulator_disable(phy->vbus);
913 clk_disable_unprepare(phy->pll_u);
914
915 phy->freq = NULL;
916}
917
918static irqreturn_t tegra_usb_phy_isr(int irq, void *data)
919{
920 u32 val, int_mask = ID_CHG_DET | VBUS_WAKEUP_CHG_DET;
921 struct tegra_usb_phy *phy = data;
922 void __iomem *base = phy->regs;
923
924 /*
925 * The PHY interrupt also wakes the USB controller driver since
926 * interrupt is shared. We don't do anything in the PHY driver,
927 * so just clear the interrupt.
928 */
929 val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
930 writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
931
932 return val & int_mask ? IRQ_HANDLED : IRQ_NONE;
933}
934
935static int tegra_usb_phy_set_wakeup(struct usb_phy *u_phy, bool enable)
936{
937 struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
938 void __iomem *base = phy->regs;
939 int ret = 0;
940 u32 val;
941
942 if (phy->wakeup_enabled && phy->mode != USB_DR_MODE_HOST &&
943 phy->irq > 0) {
944 disable_irq(phy->irq);
945
946 val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
947 val &= ~(ID_INT_EN | VBUS_WAKEUP_INT_EN);
948 writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
949
950 enable_irq(phy->irq);
951
952 free_irq(phy->irq, phy);
953
954 phy->wakeup_enabled = false;
955 }
956
957 if (enable && phy->mode != USB_DR_MODE_HOST && phy->irq > 0) {
958 ret = request_irq(phy->irq, tegra_usb_phy_isr, IRQF_SHARED,
959 dev_name(phy->u_phy.dev), phy);
960 if (!ret) {
961 disable_irq(phy->irq);
962
963 /*
964 * USB clock will be resumed once wake event will be
965 * generated. The ID-change event requires to have
966 * interrupts enabled, otherwise it won't be generated.
967 */
968 val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
969 val |= ID_INT_EN | VBUS_WAKEUP_INT_EN;
970 writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
971
972 enable_irq(phy->irq);
973 } else {
974 dev_err(phy->u_phy.dev,
975 "Failed to request interrupt: %d", ret);
976 enable = false;
977 }
978 }
979
980 phy->wakeup_enabled = enable;
981
982 return ret;
983}
984
985static int tegra_usb_phy_set_suspend(struct usb_phy *u_phy, int suspend)
986{
987 struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
988 int ret;
989
990 if (WARN_ON(!phy->freq))
991 return -EINVAL;
992
993 /*
994 * PHY is sharing IRQ with the CI driver, hence here we either
995 * disable interrupt for both PHY and CI or for CI only. The
996 * interrupt needs to be disabled while hardware is reprogrammed
997 * because interrupt touches the programmed registers, and thus,
998 * there could be a race condition.
999 */
1000 if (phy->irq > 0)
1001 disable_irq(phy->irq);
1002
1003 if (suspend)
1004 ret = tegra_usb_phy_power_off(phy);
1005 else
1006 ret = tegra_usb_phy_power_on(phy);
1007
1008 if (phy->irq > 0)
1009 enable_irq(phy->irq);
1010
1011 return ret;
1012}
1013
1014static int tegra_usb_phy_configure_pmc(struct tegra_usb_phy *phy)
1015{
1016 int err, val = 0;
1017
1018 /* older device-trees don't have PMC regmap */
1019 if (!phy->pmc_regmap)
1020 return 0;
1021
1022 /*
1023 * Tegra20 has a different layout of PMC USB register bits and AO is
1024 * enabled by default after system reset on Tegra20, so assume nothing
1025 * to do on Tegra20.
1026 */
1027 if (!phy->soc_config->requires_pmc_ao_power_up)
1028 return 0;
1029
1030 /* enable VBUS wake-up detector */
1031 if (phy->mode != USB_DR_MODE_HOST)
1032 val |= VBUS_WAKEUP_PD_P0 << phy->instance * 4;
1033
1034 /* enable ID-pin ACC detector for OTG mode switching */
1035 if (phy->mode == USB_DR_MODE_OTG)
1036 val |= ID_PD_P0 << phy->instance * 4;
1037
1038 /* disable detectors to reset them */
1039 err = regmap_set_bits(phy->pmc_regmap, PMC_USB_AO, val);
1040 if (err) {
1041 dev_err(phy->u_phy.dev, "Failed to disable PMC AO: %d\n", err);
1042 return err;
1043 }
1044
1045 usleep_range(10, 100);
1046
1047 /* enable detectors */
1048 err = regmap_clear_bits(phy->pmc_regmap, PMC_USB_AO, val);
1049 if (err) {
1050 dev_err(phy->u_phy.dev, "Failed to enable PMC AO: %d\n", err);
1051 return err;
1052 }
1053
1054 /* detectors starts to work after 10ms */
1055 usleep_range(10000, 15000);
1056
1057 return 0;
1058}
1059
1060static int tegra_usb_phy_init(struct usb_phy *u_phy)
1061{
1062 struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1063 unsigned long parent_rate;
1064 unsigned int i;
1065 int err;
1066
1067 if (WARN_ON(phy->freq))
1068 return 0;
1069
1070 err = clk_prepare_enable(phy->pll_u);
1071 if (err)
1072 return err;
1073
1074 parent_rate = clk_get_rate(clk_get_parent(phy->pll_u));
1075 for (i = 0; i < ARRAY_SIZE(tegra_freq_table); i++) {
1076 if (tegra_freq_table[i].freq == parent_rate) {
1077 phy->freq = &tegra_freq_table[i];
1078 break;
1079 }
1080 }
1081 if (!phy->freq) {
1082 dev_err(phy->u_phy.dev, "Invalid pll_u parent rate %ld\n",
1083 parent_rate);
1084 err = -EINVAL;
1085 goto disable_clk;
1086 }
1087
1088 err = regulator_enable(phy->vbus);
1089 if (err) {
1090 dev_err(phy->u_phy.dev,
1091 "Failed to enable USB VBUS regulator: %d\n", err);
1092 goto disable_clk;
1093 }
1094
1095 if (!phy->is_ulpi_phy) {
1096 err = utmip_pad_open(phy);
1097 if (err)
1098 goto disable_vbus;
1099 }
1100
1101 err = tegra_usb_phy_configure_pmc(phy);
1102 if (err)
1103 goto close_phy;
1104
1105 err = tegra_usb_phy_power_on(phy);
1106 if (err)
1107 goto close_phy;
1108
1109 return 0;
1110
1111close_phy:
1112 if (!phy->is_ulpi_phy)
1113 utmip_pad_close(phy);
1114
1115disable_vbus:
1116 regulator_disable(phy->vbus);
1117
1118disable_clk:
1119 clk_disable_unprepare(phy->pll_u);
1120
1121 phy->freq = NULL;
1122
1123 return err;
1124}
1125
1126void tegra_usb_phy_preresume(struct usb_phy *u_phy)
1127{
1128 struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1129
1130 if (!phy->is_ulpi_phy)
1131 utmi_phy_preresume(phy);
1132}
1133EXPORT_SYMBOL_GPL(tegra_usb_phy_preresume);
1134
1135void tegra_usb_phy_postresume(struct usb_phy *u_phy)
1136{
1137 struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1138
1139 if (!phy->is_ulpi_phy)
1140 utmi_phy_postresume(phy);
1141}
1142EXPORT_SYMBOL_GPL(tegra_usb_phy_postresume);
1143
1144void tegra_ehci_phy_restore_start(struct usb_phy *u_phy,
1145 enum tegra_usb_phy_port_speed port_speed)
1146{
1147 struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1148
1149 if (!phy->is_ulpi_phy)
1150 utmi_phy_restore_start(phy, port_speed);
1151}
1152EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_start);
1153
1154void tegra_ehci_phy_restore_end(struct usb_phy *u_phy)
1155{
1156 struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1157
1158 if (!phy->is_ulpi_phy)
1159 utmi_phy_restore_end(phy);
1160}
1161EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end);
1162
1163static int read_utmi_param(struct platform_device *pdev, const char *param,
1164 u8 *dest)
1165{
1166 u32 value;
1167 int err;
1168
1169 err = of_property_read_u32(pdev->dev.of_node, param, &value);
1170 if (err)
1171 dev_err(&pdev->dev,
1172 "Failed to read USB UTMI parameter %s: %d\n",
1173 param, err);
1174 else
1175 *dest = value;
1176
1177 return err;
1178}
1179
1180static int utmi_phy_probe(struct tegra_usb_phy *tegra_phy,
1181 struct platform_device *pdev)
1182{
1183 struct tegra_utmip_config *config;
1184 struct resource *res;
1185 int err;
1186
1187 tegra_phy->is_ulpi_phy = false;
1188
1189 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1190 if (!res) {
1191 dev_err(&pdev->dev, "Failed to get UTMI pad regs\n");
1192 return -ENXIO;
1193 }
1194
1195 /*
1196 * Note that UTMI pad registers are shared by all PHYs, therefore
1197 * devm_platform_ioremap_resource() can't be used here.
1198 */
1199 tegra_phy->pad_regs = devm_ioremap(&pdev->dev, res->start,
1200 resource_size(res));
1201 if (!tegra_phy->pad_regs) {
1202 dev_err(&pdev->dev, "Failed to remap UTMI pad regs\n");
1203 return -ENOMEM;
1204 }
1205
1206 tegra_phy->config = devm_kzalloc(&pdev->dev, sizeof(*config),
1207 GFP_KERNEL);
1208 if (!tegra_phy->config)
1209 return -ENOMEM;
1210
1211 config = tegra_phy->config;
1212
1213 err = read_utmi_param(pdev, "nvidia,hssync-start-delay",
1214 &config->hssync_start_delay);
1215 if (err)
1216 return err;
1217
1218 err = read_utmi_param(pdev, "nvidia,elastic-limit",
1219 &config->elastic_limit);
1220 if (err)
1221 return err;
1222
1223 err = read_utmi_param(pdev, "nvidia,idle-wait-delay",
1224 &config->idle_wait_delay);
1225 if (err)
1226 return err;
1227
1228 err = read_utmi_param(pdev, "nvidia,term-range-adj",
1229 &config->term_range_adj);
1230 if (err)
1231 return err;
1232
1233 err = read_utmi_param(pdev, "nvidia,xcvr-lsfslew",
1234 &config->xcvr_lsfslew);
1235 if (err)
1236 return err;
1237
1238 err = read_utmi_param(pdev, "nvidia,xcvr-lsrslew",
1239 &config->xcvr_lsrslew);
1240 if (err)
1241 return err;
1242
1243 if (tegra_phy->soc_config->requires_extra_tuning_parameters) {
1244 err = read_utmi_param(pdev, "nvidia,xcvr-hsslew",
1245 &config->xcvr_hsslew);
1246 if (err)
1247 return err;
1248
1249 err = read_utmi_param(pdev, "nvidia,hssquelch-level",
1250 &config->hssquelch_level);
1251 if (err)
1252 return err;
1253
1254 err = read_utmi_param(pdev, "nvidia,hsdiscon-level",
1255 &config->hsdiscon_level);
1256 if (err)
1257 return err;
1258 }
1259
1260 config->xcvr_setup_use_fuses = of_property_read_bool(
1261 pdev->dev.of_node, "nvidia,xcvr-setup-use-fuses");
1262
1263 if (!config->xcvr_setup_use_fuses) {
1264 err = read_utmi_param(pdev, "nvidia,xcvr-setup",
1265 &config->xcvr_setup);
1266 if (err)
1267 return err;
1268 }
1269
1270 return 0;
1271}
1272
1273static void tegra_usb_phy_put_pmc_device(void *dev)
1274{
1275 put_device(dev);
1276}
1277
1278static int tegra_usb_phy_parse_pmc(struct device *dev,
1279 struct tegra_usb_phy *phy)
1280{
1281 struct platform_device *pmc_pdev;
1282 struct of_phandle_args args;
1283 int err;
1284
1285 err = of_parse_phandle_with_fixed_args(dev->of_node, "nvidia,pmc",
1286 1, 0, &args);
1287 if (err) {
1288 if (err != -ENOENT)
1289 return err;
1290
1291 dev_warn_once(dev, "nvidia,pmc is missing, please update your device-tree\n");
1292 return 0;
1293 }
1294
1295 pmc_pdev = of_find_device_by_node(args.np);
1296 of_node_put(args.np);
1297 if (!pmc_pdev)
1298 return -ENODEV;
1299
1300 err = devm_add_action_or_reset(dev, tegra_usb_phy_put_pmc_device,
1301 &pmc_pdev->dev);
1302 if (err)
1303 return err;
1304
1305 if (!platform_get_drvdata(pmc_pdev))
1306 return -EPROBE_DEFER;
1307
1308 phy->pmc_regmap = dev_get_regmap(&pmc_pdev->dev, "usb_sleepwalk");
1309 if (!phy->pmc_regmap)
1310 return -EINVAL;
1311
1312 phy->instance = args.args[0];
1313
1314 return 0;
1315}
1316
1317static const struct tegra_phy_soc_config tegra20_soc_config = {
1318 .utmi_pll_config_in_car_module = false,
1319 .has_hostpc = false,
1320 .requires_usbmode_setup = false,
1321 .requires_extra_tuning_parameters = false,
1322 .requires_pmc_ao_power_up = false,
1323};
1324
1325static const struct tegra_phy_soc_config tegra30_soc_config = {
1326 .utmi_pll_config_in_car_module = true,
1327 .has_hostpc = true,
1328 .requires_usbmode_setup = true,
1329 .requires_extra_tuning_parameters = true,
1330 .requires_pmc_ao_power_up = true,
1331};
1332
1333static const struct of_device_id tegra_usb_phy_id_table[] = {
1334 { .compatible = "nvidia,tegra30-usb-phy", .data = &tegra30_soc_config },
1335 { .compatible = "nvidia,tegra20-usb-phy", .data = &tegra20_soc_config },
1336 { },
1337};
1338MODULE_DEVICE_TABLE(of, tegra_usb_phy_id_table);
1339
1340static int tegra_usb_phy_probe(struct platform_device *pdev)
1341{
1342 struct device_node *np = pdev->dev.of_node;
1343 struct tegra_usb_phy *tegra_phy;
1344 enum usb_phy_interface phy_type;
1345 struct reset_control *reset;
1346 struct gpio_desc *gpiod;
1347 struct resource *res;
1348 struct usb_phy *phy;
1349 int err;
1350
1351 tegra_phy = devm_kzalloc(&pdev->dev, sizeof(*tegra_phy), GFP_KERNEL);
1352 if (!tegra_phy)
1353 return -ENOMEM;
1354
1355 tegra_phy->soc_config = of_device_get_match_data(&pdev->dev);
1356 tegra_phy->irq = platform_get_irq_optional(pdev, 0);
1357
1358 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1359 if (!res) {
1360 dev_err(&pdev->dev, "Failed to get I/O memory\n");
1361 return -ENXIO;
1362 }
1363
1364 /*
1365 * Note that PHY and USB controller are using shared registers,
1366 * therefore devm_platform_ioremap_resource() can't be used here.
1367 */
1368 tegra_phy->regs = devm_ioremap(&pdev->dev, res->start,
1369 resource_size(res));
1370 if (!tegra_phy->regs) {
1371 dev_err(&pdev->dev, "Failed to remap I/O memory\n");
1372 return -ENOMEM;
1373 }
1374
1375 tegra_phy->is_legacy_phy =
1376 of_property_read_bool(np, "nvidia,has-legacy-mode");
1377
1378 if (of_property_present(np, "dr_mode"))
1379 tegra_phy->mode = usb_get_dr_mode(&pdev->dev);
1380 else
1381 tegra_phy->mode = USB_DR_MODE_HOST;
1382
1383 if (tegra_phy->mode == USB_DR_MODE_UNKNOWN) {
1384 dev_err(&pdev->dev, "dr_mode is invalid\n");
1385 return -EINVAL;
1386 }
1387
1388 /* On some boards, the VBUS regulator doesn't need to be controlled */
1389 tegra_phy->vbus = devm_regulator_get(&pdev->dev, "vbus");
1390 if (IS_ERR(tegra_phy->vbus))
1391 return PTR_ERR(tegra_phy->vbus);
1392
1393 tegra_phy->pll_u = devm_clk_get(&pdev->dev, "pll_u");
1394 err = PTR_ERR_OR_ZERO(tegra_phy->pll_u);
1395 if (err) {
1396 dev_err(&pdev->dev, "Failed to get pll_u clock: %d\n", err);
1397 return err;
1398 }
1399
1400 err = tegra_usb_phy_parse_pmc(&pdev->dev, tegra_phy);
1401 if (err) {
1402 dev_err_probe(&pdev->dev, err, "Failed to get PMC regmap\n");
1403 return err;
1404 }
1405
1406 phy_type = of_usb_get_phy_mode(np);
1407 switch (phy_type) {
1408 case USBPHY_INTERFACE_MODE_UTMI:
1409 err = utmi_phy_probe(tegra_phy, pdev);
1410 if (err)
1411 return err;
1412
1413 tegra_phy->pad_clk = devm_clk_get(&pdev->dev, "utmi-pads");
1414 err = PTR_ERR_OR_ZERO(tegra_phy->pad_clk);
1415 if (err) {
1416 dev_err(&pdev->dev,
1417 "Failed to get UTMIP pad clock: %d\n", err);
1418 return err;
1419 }
1420
1421 reset = devm_reset_control_get_optional_shared(&pdev->dev,
1422 "utmi-pads");
1423 err = PTR_ERR_OR_ZERO(reset);
1424 if (err) {
1425 dev_err(&pdev->dev,
1426 "Failed to get UTMI-pads reset: %d\n", err);
1427 return err;
1428 }
1429 tegra_phy->pad_rst = reset;
1430 break;
1431
1432 case USBPHY_INTERFACE_MODE_ULPI:
1433 tegra_phy->is_ulpi_phy = true;
1434
1435 tegra_phy->clk = devm_clk_get(&pdev->dev, "ulpi-link");
1436 err = PTR_ERR_OR_ZERO(tegra_phy->clk);
1437 if (err) {
1438 dev_err(&pdev->dev,
1439 "Failed to get ULPI clock: %d\n", err);
1440 return err;
1441 }
1442
1443 gpiod = devm_gpiod_get(&pdev->dev, "nvidia,phy-reset",
1444 GPIOD_OUT_HIGH);
1445 err = PTR_ERR_OR_ZERO(gpiod);
1446 if (err) {
1447 dev_err(&pdev->dev,
1448 "Request failed for reset GPIO: %d\n", err);
1449 return err;
1450 }
1451
1452 err = gpiod_set_consumer_name(gpiod, "ulpi_phy_reset_b");
1453 if (err) {
1454 dev_err(&pdev->dev,
1455 "Failed to set up reset GPIO name: %d\n", err);
1456 return err;
1457 }
1458
1459 tegra_phy->reset_gpio = gpiod;
1460
1461 phy = devm_otg_ulpi_create(&pdev->dev,
1462 &ulpi_viewport_access_ops, 0);
1463 if (!phy) {
1464 dev_err(&pdev->dev, "Failed to create ULPI OTG\n");
1465 return -ENOMEM;
1466 }
1467
1468 tegra_phy->ulpi = phy;
1469 tegra_phy->ulpi->io_priv = tegra_phy->regs + ULPI_VIEWPORT;
1470 break;
1471
1472 default:
1473 dev_err(&pdev->dev, "phy_type %u is invalid or unsupported\n",
1474 phy_type);
1475 return -EINVAL;
1476 }
1477
1478 tegra_phy->u_phy.dev = &pdev->dev;
1479 tegra_phy->u_phy.init = tegra_usb_phy_init;
1480 tegra_phy->u_phy.shutdown = tegra_usb_phy_shutdown;
1481 tegra_phy->u_phy.set_wakeup = tegra_usb_phy_set_wakeup;
1482 tegra_phy->u_phy.set_suspend = tegra_usb_phy_set_suspend;
1483
1484 platform_set_drvdata(pdev, tegra_phy);
1485
1486 return usb_add_phy_dev(&tegra_phy->u_phy);
1487}
1488
1489static void tegra_usb_phy_remove(struct platform_device *pdev)
1490{
1491 struct tegra_usb_phy *tegra_phy = platform_get_drvdata(pdev);
1492
1493 usb_remove_phy(&tegra_phy->u_phy);
1494}
1495
1496static struct platform_driver tegra_usb_phy_driver = {
1497 .probe = tegra_usb_phy_probe,
1498 .remove_new = tegra_usb_phy_remove,
1499 .driver = {
1500 .name = "tegra-phy",
1501 .of_match_table = tegra_usb_phy_id_table,
1502 },
1503};
1504module_platform_driver(tegra_usb_phy_driver);
1505
1506MODULE_DESCRIPTION("Tegra USB PHY driver");
1507MODULE_LICENSE("GPL v2");
1/*
2 * Copyright (C) 2010 Google, Inc.
3 * Copyright (C) 2013 NVIDIA Corporation
4 *
5 * Author:
6 * Erik Gilling <konkers@google.com>
7 * Benoit Goby <benoit@android.com>
8 * Venu Byravarasu <vbyravarasu@nvidia.com>
9 *
10 * This software is licensed under the terms of the GNU General Public
11 * License version 2, as published by the Free Software Foundation, and
12 * may be copied, distributed, and modified under those terms.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 */
20
21#include <linux/resource.h>
22#include <linux/delay.h>
23#include <linux/slab.h>
24#include <linux/err.h>
25#include <linux/export.h>
26#include <linux/module.h>
27#include <linux/platform_device.h>
28#include <linux/io.h>
29#include <linux/gpio.h>
30#include <linux/of.h>
31#include <linux/of_device.h>
32#include <linux/of_gpio.h>
33#include <linux/usb/otg.h>
34#include <linux/usb/ulpi.h>
35#include <linux/usb/of.h>
36#include <asm/mach-types.h>
37#include <linux/usb/ehci_def.h>
38#include <linux/usb/tegra_usb_phy.h>
39#include <linux/regulator/consumer.h>
40
41#define ULPI_VIEWPORT 0x170
42
43/* PORTSC PTS/PHCD bits, Tegra20 only */
44#define TEGRA_USB_PORTSC1 0x184
45#define TEGRA_USB_PORTSC1_PTS(x) (((x) & 0x3) << 30)
46#define TEGRA_USB_PORTSC1_PHCD (1 << 23)
47
48/* HOSTPC1 PTS/PHCD bits, Tegra30 and above */
49#define TEGRA_USB_HOSTPC1_DEVLC 0x1b4
50#define TEGRA_USB_HOSTPC1_DEVLC_PTS(x) (((x) & 0x7) << 29)
51#define TEGRA_USB_HOSTPC1_DEVLC_PHCD (1 << 22)
52
53/* Bits of PORTSC1, which will get cleared by writing 1 into them */
54#define TEGRA_PORTSC1_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
55
56#define USB_SUSP_CTRL 0x400
57#define USB_WAKE_ON_CNNT_EN_DEV (1 << 3)
58#define USB_WAKE_ON_DISCON_EN_DEV (1 << 4)
59#define USB_SUSP_CLR (1 << 5)
60#define USB_PHY_CLK_VALID (1 << 7)
61#define UTMIP_RESET (1 << 11)
62#define UHSIC_RESET (1 << 11)
63#define UTMIP_PHY_ENABLE (1 << 12)
64#define ULPI_PHY_ENABLE (1 << 13)
65#define USB_SUSP_SET (1 << 14)
66#define USB_WAKEUP_DEBOUNCE_COUNT(x) (((x) & 0x7) << 16)
67
68#define USB1_LEGACY_CTRL 0x410
69#define USB1_NO_LEGACY_MODE (1 << 0)
70#define USB1_VBUS_SENSE_CTL_MASK (3 << 1)
71#define USB1_VBUS_SENSE_CTL_VBUS_WAKEUP (0 << 1)
72#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \
73 (1 << 1)
74#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD (2 << 1)
75#define USB1_VBUS_SENSE_CTL_A_SESS_VLD (3 << 1)
76
77#define ULPI_TIMING_CTRL_0 0x424
78#define ULPI_OUTPUT_PINMUX_BYP (1 << 10)
79#define ULPI_CLKOUT_PINMUX_BYP (1 << 11)
80
81#define ULPI_TIMING_CTRL_1 0x428
82#define ULPI_DATA_TRIMMER_LOAD (1 << 0)
83#define ULPI_DATA_TRIMMER_SEL(x) (((x) & 0x7) << 1)
84#define ULPI_STPDIRNXT_TRIMMER_LOAD (1 << 16)
85#define ULPI_STPDIRNXT_TRIMMER_SEL(x) (((x) & 0x7) << 17)
86#define ULPI_DIR_TRIMMER_LOAD (1 << 24)
87#define ULPI_DIR_TRIMMER_SEL(x) (((x) & 0x7) << 25)
88
89#define UTMIP_PLL_CFG1 0x804
90#define UTMIP_XTAL_FREQ_COUNT(x) (((x) & 0xfff) << 0)
91#define UTMIP_PLLU_ENABLE_DLY_COUNT(x) (((x) & 0x1f) << 27)
92
93#define UTMIP_XCVR_CFG0 0x808
94#define UTMIP_XCVR_SETUP(x) (((x) & 0xf) << 0)
95#define UTMIP_XCVR_SETUP_MSB(x) ((((x) & 0x70) >> 4) << 22)
96#define UTMIP_XCVR_LSRSLEW(x) (((x) & 0x3) << 8)
97#define UTMIP_XCVR_LSFSLEW(x) (((x) & 0x3) << 10)
98#define UTMIP_FORCE_PD_POWERDOWN (1 << 14)
99#define UTMIP_FORCE_PD2_POWERDOWN (1 << 16)
100#define UTMIP_FORCE_PDZI_POWERDOWN (1 << 18)
101#define UTMIP_XCVR_LSBIAS_SEL (1 << 21)
102#define UTMIP_XCVR_HSSLEW(x) (((x) & 0x3) << 4)
103#define UTMIP_XCVR_HSSLEW_MSB(x) ((((x) & 0x1fc) >> 2) << 25)
104
105#define UTMIP_BIAS_CFG0 0x80c
106#define UTMIP_OTGPD (1 << 11)
107#define UTMIP_BIASPD (1 << 10)
108#define UTMIP_HSSQUELCH_LEVEL(x) (((x) & 0x3) << 0)
109#define UTMIP_HSDISCON_LEVEL(x) (((x) & 0x3) << 2)
110#define UTMIP_HSDISCON_LEVEL_MSB(x) ((((x) & 0x4) >> 2) << 24)
111
112#define UTMIP_HSRX_CFG0 0x810
113#define UTMIP_ELASTIC_LIMIT(x) (((x) & 0x1f) << 10)
114#define UTMIP_IDLE_WAIT(x) (((x) & 0x1f) << 15)
115
116#define UTMIP_HSRX_CFG1 0x814
117#define UTMIP_HS_SYNC_START_DLY(x) (((x) & 0x1f) << 1)
118
119#define UTMIP_TX_CFG0 0x820
120#define UTMIP_FS_PREABMLE_J (1 << 19)
121#define UTMIP_HS_DISCON_DISABLE (1 << 8)
122
123#define UTMIP_MISC_CFG0 0x824
124#define UTMIP_DPDM_OBSERVE (1 << 26)
125#define UTMIP_DPDM_OBSERVE_SEL(x) (((x) & 0xf) << 27)
126#define UTMIP_DPDM_OBSERVE_SEL_FS_J UTMIP_DPDM_OBSERVE_SEL(0xf)
127#define UTMIP_DPDM_OBSERVE_SEL_FS_K UTMIP_DPDM_OBSERVE_SEL(0xe)
128#define UTMIP_DPDM_OBSERVE_SEL_FS_SE1 UTMIP_DPDM_OBSERVE_SEL(0xd)
129#define UTMIP_DPDM_OBSERVE_SEL_FS_SE0 UTMIP_DPDM_OBSERVE_SEL(0xc)
130#define UTMIP_SUSPEND_EXIT_ON_EDGE (1 << 22)
131
132#define UTMIP_MISC_CFG1 0x828
133#define UTMIP_PLL_ACTIVE_DLY_COUNT(x) (((x) & 0x1f) << 18)
134#define UTMIP_PLLU_STABLE_COUNT(x) (((x) & 0xfff) << 6)
135
136#define UTMIP_DEBOUNCE_CFG0 0x82c
137#define UTMIP_BIAS_DEBOUNCE_A(x) (((x) & 0xffff) << 0)
138
139#define UTMIP_BAT_CHRG_CFG0 0x830
140#define UTMIP_PD_CHRG (1 << 0)
141
142#define UTMIP_SPARE_CFG0 0x834
143#define FUSE_SETUP_SEL (1 << 3)
144
145#define UTMIP_XCVR_CFG1 0x838
146#define UTMIP_FORCE_PDDISC_POWERDOWN (1 << 0)
147#define UTMIP_FORCE_PDCHRP_POWERDOWN (1 << 2)
148#define UTMIP_FORCE_PDDR_POWERDOWN (1 << 4)
149#define UTMIP_XCVR_TERM_RANGE_ADJ(x) (((x) & 0xf) << 18)
150
151#define UTMIP_BIAS_CFG1 0x83c
152#define UTMIP_BIAS_PDTRK_COUNT(x) (((x) & 0x1f) << 3)
153
154/* For Tegra30 and above only, the address is different in Tegra20 */
155#define USB_USBMODE 0x1f8
156#define USB_USBMODE_MASK (3 << 0)
157#define USB_USBMODE_HOST (3 << 0)
158#define USB_USBMODE_DEVICE (2 << 0)
159
160static DEFINE_SPINLOCK(utmip_pad_lock);
161static int utmip_pad_count;
162
163struct tegra_xtal_freq {
164 int freq;
165 u8 enable_delay;
166 u8 stable_count;
167 u8 active_delay;
168 u8 xtal_freq_count;
169 u16 debounce;
170};
171
172static const struct tegra_xtal_freq tegra_freq_table[] = {
173 {
174 .freq = 12000000,
175 .enable_delay = 0x02,
176 .stable_count = 0x2F,
177 .active_delay = 0x04,
178 .xtal_freq_count = 0x76,
179 .debounce = 0x7530,
180 },
181 {
182 .freq = 13000000,
183 .enable_delay = 0x02,
184 .stable_count = 0x33,
185 .active_delay = 0x05,
186 .xtal_freq_count = 0x7F,
187 .debounce = 0x7EF4,
188 },
189 {
190 .freq = 19200000,
191 .enable_delay = 0x03,
192 .stable_count = 0x4B,
193 .active_delay = 0x06,
194 .xtal_freq_count = 0xBB,
195 .debounce = 0xBB80,
196 },
197 {
198 .freq = 26000000,
199 .enable_delay = 0x04,
200 .stable_count = 0x66,
201 .active_delay = 0x09,
202 .xtal_freq_count = 0xFE,
203 .debounce = 0xFDE8,
204 },
205};
206
207static void set_pts(struct tegra_usb_phy *phy, u8 pts_val)
208{
209 void __iomem *base = phy->regs;
210 unsigned long val;
211
212 if (phy->soc_config->has_hostpc) {
213 val = readl(base + TEGRA_USB_HOSTPC1_DEVLC);
214 val &= ~TEGRA_USB_HOSTPC1_DEVLC_PTS(~0);
215 val |= TEGRA_USB_HOSTPC1_DEVLC_PTS(pts_val);
216 writel(val, base + TEGRA_USB_HOSTPC1_DEVLC);
217 } else {
218 val = readl(base + TEGRA_USB_PORTSC1) & ~TEGRA_PORTSC1_RWC_BITS;
219 val &= ~TEGRA_USB_PORTSC1_PTS(~0);
220 val |= TEGRA_USB_PORTSC1_PTS(pts_val);
221 writel(val, base + TEGRA_USB_PORTSC1);
222 }
223}
224
225static void set_phcd(struct tegra_usb_phy *phy, bool enable)
226{
227 void __iomem *base = phy->regs;
228 unsigned long val;
229
230 if (phy->soc_config->has_hostpc) {
231 val = readl(base + TEGRA_USB_HOSTPC1_DEVLC);
232 if (enable)
233 val |= TEGRA_USB_HOSTPC1_DEVLC_PHCD;
234 else
235 val &= ~TEGRA_USB_HOSTPC1_DEVLC_PHCD;
236 writel(val, base + TEGRA_USB_HOSTPC1_DEVLC);
237 } else {
238 val = readl(base + TEGRA_USB_PORTSC1) & ~PORT_RWC_BITS;
239 if (enable)
240 val |= TEGRA_USB_PORTSC1_PHCD;
241 else
242 val &= ~TEGRA_USB_PORTSC1_PHCD;
243 writel(val, base + TEGRA_USB_PORTSC1);
244 }
245}
246
247static int utmip_pad_open(struct tegra_usb_phy *phy)
248{
249 phy->pad_clk = devm_clk_get(phy->u_phy.dev, "utmi-pads");
250 if (IS_ERR(phy->pad_clk)) {
251 pr_err("%s: can't get utmip pad clock\n", __func__);
252 return PTR_ERR(phy->pad_clk);
253 }
254
255 return 0;
256}
257
258static void utmip_pad_power_on(struct tegra_usb_phy *phy)
259{
260 unsigned long val, flags;
261 void __iomem *base = phy->pad_regs;
262 struct tegra_utmip_config *config = phy->config;
263
264 clk_prepare_enable(phy->pad_clk);
265
266 spin_lock_irqsave(&utmip_pad_lock, flags);
267
268 if (utmip_pad_count++ == 0) {
269 val = readl(base + UTMIP_BIAS_CFG0);
270 val &= ~(UTMIP_OTGPD | UTMIP_BIASPD);
271
272 if (phy->soc_config->requires_extra_tuning_parameters) {
273 val &= ~(UTMIP_HSSQUELCH_LEVEL(~0) |
274 UTMIP_HSDISCON_LEVEL(~0) |
275 UTMIP_HSDISCON_LEVEL_MSB(~0));
276
277 val |= UTMIP_HSSQUELCH_LEVEL(config->hssquelch_level);
278 val |= UTMIP_HSDISCON_LEVEL(config->hsdiscon_level);
279 val |= UTMIP_HSDISCON_LEVEL_MSB(config->hsdiscon_level);
280 }
281 writel(val, base + UTMIP_BIAS_CFG0);
282 }
283
284 spin_unlock_irqrestore(&utmip_pad_lock, flags);
285
286 clk_disable_unprepare(phy->pad_clk);
287}
288
289static int utmip_pad_power_off(struct tegra_usb_phy *phy)
290{
291 unsigned long val, flags;
292 void __iomem *base = phy->pad_regs;
293
294 if (!utmip_pad_count) {
295 pr_err("%s: utmip pad already powered off\n", __func__);
296 return -EINVAL;
297 }
298
299 clk_prepare_enable(phy->pad_clk);
300
301 spin_lock_irqsave(&utmip_pad_lock, flags);
302
303 if (--utmip_pad_count == 0) {
304 val = readl(base + UTMIP_BIAS_CFG0);
305 val |= UTMIP_OTGPD | UTMIP_BIASPD;
306 writel(val, base + UTMIP_BIAS_CFG0);
307 }
308
309 spin_unlock_irqrestore(&utmip_pad_lock, flags);
310
311 clk_disable_unprepare(phy->pad_clk);
312
313 return 0;
314}
315
316static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
317{
318 unsigned long timeout = 2000;
319 do {
320 if ((readl(reg) & mask) == result)
321 return 0;
322 udelay(1);
323 timeout--;
324 } while (timeout);
325 return -1;
326}
327
328static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
329{
330 unsigned long val;
331 void __iomem *base = phy->regs;
332
333 if (phy->is_legacy_phy) {
334 val = readl(base + USB_SUSP_CTRL);
335 val |= USB_SUSP_SET;
336 writel(val, base + USB_SUSP_CTRL);
337
338 udelay(10);
339
340 val = readl(base + USB_SUSP_CTRL);
341 val &= ~USB_SUSP_SET;
342 writel(val, base + USB_SUSP_CTRL);
343 } else
344 set_phcd(phy, true);
345
346 if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) < 0)
347 pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
348}
349
350static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
351{
352 unsigned long val;
353 void __iomem *base = phy->regs;
354
355 if (phy->is_legacy_phy) {
356 val = readl(base + USB_SUSP_CTRL);
357 val |= USB_SUSP_CLR;
358 writel(val, base + USB_SUSP_CTRL);
359
360 udelay(10);
361
362 val = readl(base + USB_SUSP_CTRL);
363 val &= ~USB_SUSP_CLR;
364 writel(val, base + USB_SUSP_CTRL);
365 } else
366 set_phcd(phy, false);
367
368 if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID,
369 USB_PHY_CLK_VALID))
370 pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
371}
372
373static int utmi_phy_power_on(struct tegra_usb_phy *phy)
374{
375 unsigned long val;
376 void __iomem *base = phy->regs;
377 struct tegra_utmip_config *config = phy->config;
378
379 val = readl(base + USB_SUSP_CTRL);
380 val |= UTMIP_RESET;
381 writel(val, base + USB_SUSP_CTRL);
382
383 if (phy->is_legacy_phy) {
384 val = readl(base + USB1_LEGACY_CTRL);
385 val |= USB1_NO_LEGACY_MODE;
386 writel(val, base + USB1_LEGACY_CTRL);
387 }
388
389 val = readl(base + UTMIP_TX_CFG0);
390 val |= UTMIP_FS_PREABMLE_J;
391 writel(val, base + UTMIP_TX_CFG0);
392
393 val = readl(base + UTMIP_HSRX_CFG0);
394 val &= ~(UTMIP_IDLE_WAIT(~0) | UTMIP_ELASTIC_LIMIT(~0));
395 val |= UTMIP_IDLE_WAIT(config->idle_wait_delay);
396 val |= UTMIP_ELASTIC_LIMIT(config->elastic_limit);
397 writel(val, base + UTMIP_HSRX_CFG0);
398
399 val = readl(base + UTMIP_HSRX_CFG1);
400 val &= ~UTMIP_HS_SYNC_START_DLY(~0);
401 val |= UTMIP_HS_SYNC_START_DLY(config->hssync_start_delay);
402 writel(val, base + UTMIP_HSRX_CFG1);
403
404 val = readl(base + UTMIP_DEBOUNCE_CFG0);
405 val &= ~UTMIP_BIAS_DEBOUNCE_A(~0);
406 val |= UTMIP_BIAS_DEBOUNCE_A(phy->freq->debounce);
407 writel(val, base + UTMIP_DEBOUNCE_CFG0);
408
409 val = readl(base + UTMIP_MISC_CFG0);
410 val &= ~UTMIP_SUSPEND_EXIT_ON_EDGE;
411 writel(val, base + UTMIP_MISC_CFG0);
412
413 if (!phy->soc_config->utmi_pll_config_in_car_module) {
414 val = readl(base + UTMIP_MISC_CFG1);
415 val &= ~(UTMIP_PLL_ACTIVE_DLY_COUNT(~0) |
416 UTMIP_PLLU_STABLE_COUNT(~0));
417 val |= UTMIP_PLL_ACTIVE_DLY_COUNT(phy->freq->active_delay) |
418 UTMIP_PLLU_STABLE_COUNT(phy->freq->stable_count);
419 writel(val, base + UTMIP_MISC_CFG1);
420
421 val = readl(base + UTMIP_PLL_CFG1);
422 val &= ~(UTMIP_XTAL_FREQ_COUNT(~0) |
423 UTMIP_PLLU_ENABLE_DLY_COUNT(~0));
424 val |= UTMIP_XTAL_FREQ_COUNT(phy->freq->xtal_freq_count) |
425 UTMIP_PLLU_ENABLE_DLY_COUNT(phy->freq->enable_delay);
426 writel(val, base + UTMIP_PLL_CFG1);
427 }
428
429 if (phy->mode == USB_DR_MODE_PERIPHERAL) {
430 val = readl(base + USB_SUSP_CTRL);
431 val &= ~(USB_WAKE_ON_CNNT_EN_DEV | USB_WAKE_ON_DISCON_EN_DEV);
432 writel(val, base + USB_SUSP_CTRL);
433
434 val = readl(base + UTMIP_BAT_CHRG_CFG0);
435 val &= ~UTMIP_PD_CHRG;
436 writel(val, base + UTMIP_BAT_CHRG_CFG0);
437 } else {
438 val = readl(base + UTMIP_BAT_CHRG_CFG0);
439 val |= UTMIP_PD_CHRG;
440 writel(val, base + UTMIP_BAT_CHRG_CFG0);
441 }
442
443 utmip_pad_power_on(phy);
444
445 val = readl(base + UTMIP_XCVR_CFG0);
446 val &= ~(UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
447 UTMIP_FORCE_PDZI_POWERDOWN | UTMIP_XCVR_LSBIAS_SEL |
448 UTMIP_XCVR_SETUP(~0) | UTMIP_XCVR_SETUP_MSB(~0) |
449 UTMIP_XCVR_LSFSLEW(~0) | UTMIP_XCVR_LSRSLEW(~0));
450
451 if (!config->xcvr_setup_use_fuses) {
452 val |= UTMIP_XCVR_SETUP(config->xcvr_setup);
453 val |= UTMIP_XCVR_SETUP_MSB(config->xcvr_setup);
454 }
455 val |= UTMIP_XCVR_LSFSLEW(config->xcvr_lsfslew);
456 val |= UTMIP_XCVR_LSRSLEW(config->xcvr_lsrslew);
457
458 if (phy->soc_config->requires_extra_tuning_parameters) {
459 val &= ~(UTMIP_XCVR_HSSLEW(~0) | UTMIP_XCVR_HSSLEW_MSB(~0));
460 val |= UTMIP_XCVR_HSSLEW(config->xcvr_hsslew);
461 val |= UTMIP_XCVR_HSSLEW_MSB(config->xcvr_hsslew);
462 }
463 writel(val, base + UTMIP_XCVR_CFG0);
464
465 val = readl(base + UTMIP_XCVR_CFG1);
466 val &= ~(UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
467 UTMIP_FORCE_PDDR_POWERDOWN | UTMIP_XCVR_TERM_RANGE_ADJ(~0));
468 val |= UTMIP_XCVR_TERM_RANGE_ADJ(config->term_range_adj);
469 writel(val, base + UTMIP_XCVR_CFG1);
470
471 val = readl(base + UTMIP_BIAS_CFG1);
472 val &= ~UTMIP_BIAS_PDTRK_COUNT(~0);
473 val |= UTMIP_BIAS_PDTRK_COUNT(0x5);
474 writel(val, base + UTMIP_BIAS_CFG1);
475
476 val = readl(base + UTMIP_SPARE_CFG0);
477 if (config->xcvr_setup_use_fuses)
478 val |= FUSE_SETUP_SEL;
479 else
480 val &= ~FUSE_SETUP_SEL;
481 writel(val, base + UTMIP_SPARE_CFG0);
482
483 if (!phy->is_legacy_phy) {
484 val = readl(base + USB_SUSP_CTRL);
485 val |= UTMIP_PHY_ENABLE;
486 writel(val, base + USB_SUSP_CTRL);
487 }
488
489 val = readl(base + USB_SUSP_CTRL);
490 val &= ~UTMIP_RESET;
491 writel(val, base + USB_SUSP_CTRL);
492
493 if (phy->is_legacy_phy) {
494 val = readl(base + USB1_LEGACY_CTRL);
495 val &= ~USB1_VBUS_SENSE_CTL_MASK;
496 val |= USB1_VBUS_SENSE_CTL_A_SESS_VLD;
497 writel(val, base + USB1_LEGACY_CTRL);
498
499 val = readl(base + USB_SUSP_CTRL);
500 val &= ~USB_SUSP_SET;
501 writel(val, base + USB_SUSP_CTRL);
502 }
503
504 utmi_phy_clk_enable(phy);
505
506 if (phy->soc_config->requires_usbmode_setup) {
507 val = readl(base + USB_USBMODE);
508 val &= ~USB_USBMODE_MASK;
509 if (phy->mode == USB_DR_MODE_HOST)
510 val |= USB_USBMODE_HOST;
511 else
512 val |= USB_USBMODE_DEVICE;
513 writel(val, base + USB_USBMODE);
514 }
515
516 if (!phy->is_legacy_phy)
517 set_pts(phy, 0);
518
519 return 0;
520}
521
522static int utmi_phy_power_off(struct tegra_usb_phy *phy)
523{
524 unsigned long val;
525 void __iomem *base = phy->regs;
526
527 utmi_phy_clk_disable(phy);
528
529 if (phy->mode == USB_DR_MODE_PERIPHERAL) {
530 val = readl(base + USB_SUSP_CTRL);
531 val &= ~USB_WAKEUP_DEBOUNCE_COUNT(~0);
532 val |= USB_WAKE_ON_CNNT_EN_DEV | USB_WAKEUP_DEBOUNCE_COUNT(5);
533 writel(val, base + USB_SUSP_CTRL);
534 }
535
536 val = readl(base + USB_SUSP_CTRL);
537 val |= UTMIP_RESET;
538 writel(val, base + USB_SUSP_CTRL);
539
540 val = readl(base + UTMIP_BAT_CHRG_CFG0);
541 val |= UTMIP_PD_CHRG;
542 writel(val, base + UTMIP_BAT_CHRG_CFG0);
543
544 val = readl(base + UTMIP_XCVR_CFG0);
545 val |= UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
546 UTMIP_FORCE_PDZI_POWERDOWN;
547 writel(val, base + UTMIP_XCVR_CFG0);
548
549 val = readl(base + UTMIP_XCVR_CFG1);
550 val |= UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
551 UTMIP_FORCE_PDDR_POWERDOWN;
552 writel(val, base + UTMIP_XCVR_CFG1);
553
554 return utmip_pad_power_off(phy);
555}
556
557static void utmi_phy_preresume(struct tegra_usb_phy *phy)
558{
559 unsigned long val;
560 void __iomem *base = phy->regs;
561
562 val = readl(base + UTMIP_TX_CFG0);
563 val |= UTMIP_HS_DISCON_DISABLE;
564 writel(val, base + UTMIP_TX_CFG0);
565}
566
567static void utmi_phy_postresume(struct tegra_usb_phy *phy)
568{
569 unsigned long val;
570 void __iomem *base = phy->regs;
571
572 val = readl(base + UTMIP_TX_CFG0);
573 val &= ~UTMIP_HS_DISCON_DISABLE;
574 writel(val, base + UTMIP_TX_CFG0);
575}
576
577static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
578 enum tegra_usb_phy_port_speed port_speed)
579{
580 unsigned long val;
581 void __iomem *base = phy->regs;
582
583 val = readl(base + UTMIP_MISC_CFG0);
584 val &= ~UTMIP_DPDM_OBSERVE_SEL(~0);
585 if (port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW)
586 val |= UTMIP_DPDM_OBSERVE_SEL_FS_K;
587 else
588 val |= UTMIP_DPDM_OBSERVE_SEL_FS_J;
589 writel(val, base + UTMIP_MISC_CFG0);
590 udelay(1);
591
592 val = readl(base + UTMIP_MISC_CFG0);
593 val |= UTMIP_DPDM_OBSERVE;
594 writel(val, base + UTMIP_MISC_CFG0);
595 udelay(10);
596}
597
598static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
599{
600 unsigned long val;
601 void __iomem *base = phy->regs;
602
603 val = readl(base + UTMIP_MISC_CFG0);
604 val &= ~UTMIP_DPDM_OBSERVE;
605 writel(val, base + UTMIP_MISC_CFG0);
606 udelay(10);
607}
608
609static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
610{
611 int ret;
612 unsigned long val;
613 void __iomem *base = phy->regs;
614
615 ret = gpio_direction_output(phy->reset_gpio, 0);
616 if (ret < 0) {
617 dev_err(phy->u_phy.dev, "gpio %d not set to 0\n",
618 phy->reset_gpio);
619 return ret;
620 }
621 msleep(5);
622 ret = gpio_direction_output(phy->reset_gpio, 1);
623 if (ret < 0) {
624 dev_err(phy->u_phy.dev, "gpio %d not set to 1\n",
625 phy->reset_gpio);
626 return ret;
627 }
628
629 clk_prepare_enable(phy->clk);
630 msleep(1);
631
632 val = readl(base + USB_SUSP_CTRL);
633 val |= UHSIC_RESET;
634 writel(val, base + USB_SUSP_CTRL);
635
636 val = readl(base + ULPI_TIMING_CTRL_0);
637 val |= ULPI_OUTPUT_PINMUX_BYP | ULPI_CLKOUT_PINMUX_BYP;
638 writel(val, base + ULPI_TIMING_CTRL_0);
639
640 val = readl(base + USB_SUSP_CTRL);
641 val |= ULPI_PHY_ENABLE;
642 writel(val, base + USB_SUSP_CTRL);
643
644 val = 0;
645 writel(val, base + ULPI_TIMING_CTRL_1);
646
647 val |= ULPI_DATA_TRIMMER_SEL(4);
648 val |= ULPI_STPDIRNXT_TRIMMER_SEL(4);
649 val |= ULPI_DIR_TRIMMER_SEL(4);
650 writel(val, base + ULPI_TIMING_CTRL_1);
651 udelay(10);
652
653 val |= ULPI_DATA_TRIMMER_LOAD;
654 val |= ULPI_STPDIRNXT_TRIMMER_LOAD;
655 val |= ULPI_DIR_TRIMMER_LOAD;
656 writel(val, base + ULPI_TIMING_CTRL_1);
657
658 /* Fix VbusInvalid due to floating VBUS */
659 ret = usb_phy_io_write(phy->ulpi, 0x40, 0x08);
660 if (ret) {
661 pr_err("%s: ulpi write failed\n", __func__);
662 return ret;
663 }
664
665 ret = usb_phy_io_write(phy->ulpi, 0x80, 0x0B);
666 if (ret) {
667 pr_err("%s: ulpi write failed\n", __func__);
668 return ret;
669 }
670
671 val = readl(base + USB_SUSP_CTRL);
672 val |= USB_SUSP_CLR;
673 writel(val, base + USB_SUSP_CTRL);
674 udelay(100);
675
676 val = readl(base + USB_SUSP_CTRL);
677 val &= ~USB_SUSP_CLR;
678 writel(val, base + USB_SUSP_CTRL);
679
680 return 0;
681}
682
683static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
684{
685 clk_disable(phy->clk);
686 return gpio_direction_output(phy->reset_gpio, 0);
687}
688
689static void tegra_usb_phy_close(struct usb_phy *x)
690{
691 struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
692
693 if (!IS_ERR(phy->vbus))
694 regulator_disable(phy->vbus);
695
696 clk_disable_unprepare(phy->pll_u);
697}
698
699static int tegra_usb_phy_power_on(struct tegra_usb_phy *phy)
700{
701 if (phy->is_ulpi_phy)
702 return ulpi_phy_power_on(phy);
703 else
704 return utmi_phy_power_on(phy);
705}
706
707static int tegra_usb_phy_power_off(struct tegra_usb_phy *phy)
708{
709 if (phy->is_ulpi_phy)
710 return ulpi_phy_power_off(phy);
711 else
712 return utmi_phy_power_off(phy);
713}
714
715static int tegra_usb_phy_suspend(struct usb_phy *x, int suspend)
716{
717 struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
718 if (suspend)
719 return tegra_usb_phy_power_off(phy);
720 else
721 return tegra_usb_phy_power_on(phy);
722}
723
724static int ulpi_open(struct tegra_usb_phy *phy)
725{
726 int err;
727
728 phy->clk = devm_clk_get(phy->u_phy.dev, "ulpi-link");
729 if (IS_ERR(phy->clk)) {
730 pr_err("%s: can't get ulpi clock\n", __func__);
731 return PTR_ERR(phy->clk);
732 }
733
734 err = devm_gpio_request(phy->u_phy.dev, phy->reset_gpio,
735 "ulpi_phy_reset_b");
736 if (err < 0) {
737 dev_err(phy->u_phy.dev, "request failed for gpio: %d\n",
738 phy->reset_gpio);
739 return err;
740 }
741
742 err = gpio_direction_output(phy->reset_gpio, 0);
743 if (err < 0) {
744 dev_err(phy->u_phy.dev, "gpio %d direction not set to output\n",
745 phy->reset_gpio);
746 return err;
747 }
748
749 phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
750 if (!phy->ulpi) {
751 dev_err(phy->u_phy.dev, "otg_ulpi_create returned NULL\n");
752 err = -ENOMEM;
753 return err;
754 }
755
756 phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT;
757 return 0;
758}
759
760static int tegra_usb_phy_init(struct tegra_usb_phy *phy)
761{
762 unsigned long parent_rate;
763 int i;
764 int err;
765
766 phy->pll_u = devm_clk_get(phy->u_phy.dev, "pll_u");
767 if (IS_ERR(phy->pll_u)) {
768 pr_err("Can't get pll_u clock\n");
769 return PTR_ERR(phy->pll_u);
770 }
771
772 err = clk_prepare_enable(phy->pll_u);
773 if (err)
774 return err;
775
776 parent_rate = clk_get_rate(clk_get_parent(phy->pll_u));
777 for (i = 0; i < ARRAY_SIZE(tegra_freq_table); i++) {
778 if (tegra_freq_table[i].freq == parent_rate) {
779 phy->freq = &tegra_freq_table[i];
780 break;
781 }
782 }
783 if (!phy->freq) {
784 pr_err("invalid pll_u parent rate %ld\n", parent_rate);
785 err = -EINVAL;
786 goto fail;
787 }
788
789 if (!IS_ERR(phy->vbus)) {
790 err = regulator_enable(phy->vbus);
791 if (err) {
792 dev_err(phy->u_phy.dev,
793 "failed to enable usb vbus regulator: %d\n",
794 err);
795 goto fail;
796 }
797 }
798
799 if (phy->is_ulpi_phy)
800 err = ulpi_open(phy);
801 else
802 err = utmip_pad_open(phy);
803 if (err < 0)
804 goto fail;
805
806 return 0;
807
808fail:
809 clk_disable_unprepare(phy->pll_u);
810 return err;
811}
812
813void tegra_usb_phy_preresume(struct usb_phy *x)
814{
815 struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
816
817 if (!phy->is_ulpi_phy)
818 utmi_phy_preresume(phy);
819}
820EXPORT_SYMBOL_GPL(tegra_usb_phy_preresume);
821
822void tegra_usb_phy_postresume(struct usb_phy *x)
823{
824 struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
825
826 if (!phy->is_ulpi_phy)
827 utmi_phy_postresume(phy);
828}
829EXPORT_SYMBOL_GPL(tegra_usb_phy_postresume);
830
831void tegra_ehci_phy_restore_start(struct usb_phy *x,
832 enum tegra_usb_phy_port_speed port_speed)
833{
834 struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
835
836 if (!phy->is_ulpi_phy)
837 utmi_phy_restore_start(phy, port_speed);
838}
839EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_start);
840
841void tegra_ehci_phy_restore_end(struct usb_phy *x)
842{
843 struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
844
845 if (!phy->is_ulpi_phy)
846 utmi_phy_restore_end(phy);
847}
848EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end);
849
850static int read_utmi_param(struct platform_device *pdev, const char *param,
851 u8 *dest)
852{
853 u32 value;
854 int err = of_property_read_u32(pdev->dev.of_node, param, &value);
855 *dest = (u8)value;
856 if (err < 0)
857 dev_err(&pdev->dev, "Failed to read USB UTMI parameter %s: %d\n",
858 param, err);
859 return err;
860}
861
862static int utmi_phy_probe(struct tegra_usb_phy *tegra_phy,
863 struct platform_device *pdev)
864{
865 struct resource *res;
866 int err;
867 struct tegra_utmip_config *config;
868
869 tegra_phy->is_ulpi_phy = false;
870
871 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
872 if (!res) {
873 dev_err(&pdev->dev, "Failed to get UTMI Pad regs\n");
874 return -ENXIO;
875 }
876
877 tegra_phy->pad_regs = devm_ioremap(&pdev->dev, res->start,
878 resource_size(res));
879 if (!tegra_phy->pad_regs) {
880 dev_err(&pdev->dev, "Failed to remap UTMI Pad regs\n");
881 return -ENOMEM;
882 }
883
884 tegra_phy->config = devm_kzalloc(&pdev->dev,
885 sizeof(*tegra_phy->config), GFP_KERNEL);
886 if (!tegra_phy->config) {
887 dev_err(&pdev->dev,
888 "unable to allocate memory for USB UTMIP config\n");
889 return -ENOMEM;
890 }
891
892 config = tegra_phy->config;
893
894 err = read_utmi_param(pdev, "nvidia,hssync-start-delay",
895 &config->hssync_start_delay);
896 if (err < 0)
897 return err;
898
899 err = read_utmi_param(pdev, "nvidia,elastic-limit",
900 &config->elastic_limit);
901 if (err < 0)
902 return err;
903
904 err = read_utmi_param(pdev, "nvidia,idle-wait-delay",
905 &config->idle_wait_delay);
906 if (err < 0)
907 return err;
908
909 err = read_utmi_param(pdev, "nvidia,term-range-adj",
910 &config->term_range_adj);
911 if (err < 0)
912 return err;
913
914 err = read_utmi_param(pdev, "nvidia,xcvr-lsfslew",
915 &config->xcvr_lsfslew);
916 if (err < 0)
917 return err;
918
919 err = read_utmi_param(pdev, "nvidia,xcvr-lsrslew",
920 &config->xcvr_lsrslew);
921 if (err < 0)
922 return err;
923
924 if (tegra_phy->soc_config->requires_extra_tuning_parameters) {
925 err = read_utmi_param(pdev, "nvidia,xcvr-hsslew",
926 &config->xcvr_hsslew);
927 if (err < 0)
928 return err;
929
930 err = read_utmi_param(pdev, "nvidia,hssquelch-level",
931 &config->hssquelch_level);
932 if (err < 0)
933 return err;
934
935 err = read_utmi_param(pdev, "nvidia,hsdiscon-level",
936 &config->hsdiscon_level);
937 if (err < 0)
938 return err;
939 }
940
941 config->xcvr_setup_use_fuses = of_property_read_bool(
942 pdev->dev.of_node, "nvidia,xcvr-setup-use-fuses");
943
944 if (!config->xcvr_setup_use_fuses) {
945 err = read_utmi_param(pdev, "nvidia,xcvr-setup",
946 &config->xcvr_setup);
947 if (err < 0)
948 return err;
949 }
950
951 return 0;
952}
953
954static const struct tegra_phy_soc_config tegra20_soc_config = {
955 .utmi_pll_config_in_car_module = false,
956 .has_hostpc = false,
957 .requires_usbmode_setup = false,
958 .requires_extra_tuning_parameters = false,
959};
960
961static const struct tegra_phy_soc_config tegra30_soc_config = {
962 .utmi_pll_config_in_car_module = true,
963 .has_hostpc = true,
964 .requires_usbmode_setup = true,
965 .requires_extra_tuning_parameters = true,
966};
967
968static struct of_device_id tegra_usb_phy_id_table[] = {
969 { .compatible = "nvidia,tegra30-usb-phy", .data = &tegra30_soc_config },
970 { .compatible = "nvidia,tegra20-usb-phy", .data = &tegra20_soc_config },
971 { },
972};
973MODULE_DEVICE_TABLE(of, tegra_usb_phy_id_table);
974
975static int tegra_usb_phy_probe(struct platform_device *pdev)
976{
977 const struct of_device_id *match;
978 struct resource *res;
979 struct tegra_usb_phy *tegra_phy = NULL;
980 struct device_node *np = pdev->dev.of_node;
981 enum usb_phy_interface phy_type;
982 int err;
983
984 tegra_phy = devm_kzalloc(&pdev->dev, sizeof(*tegra_phy), GFP_KERNEL);
985 if (!tegra_phy) {
986 dev_err(&pdev->dev, "unable to allocate memory for USB2 PHY\n");
987 return -ENOMEM;
988 }
989
990 match = of_match_device(tegra_usb_phy_id_table, &pdev->dev);
991 if (!match) {
992 dev_err(&pdev->dev, "Error: No device match found\n");
993 return -ENODEV;
994 }
995 tegra_phy->soc_config = match->data;
996
997 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
998 if (!res) {
999 dev_err(&pdev->dev, "Failed to get I/O memory\n");
1000 return -ENXIO;
1001 }
1002
1003 tegra_phy->regs = devm_ioremap(&pdev->dev, res->start,
1004 resource_size(res));
1005 if (!tegra_phy->regs) {
1006 dev_err(&pdev->dev, "Failed to remap I/O memory\n");
1007 return -ENOMEM;
1008 }
1009
1010 tegra_phy->is_legacy_phy =
1011 of_property_read_bool(np, "nvidia,has-legacy-mode");
1012
1013 phy_type = of_usb_get_phy_mode(np);
1014 switch (phy_type) {
1015 case USBPHY_INTERFACE_MODE_UTMI:
1016 err = utmi_phy_probe(tegra_phy, pdev);
1017 if (err < 0)
1018 return err;
1019 break;
1020
1021 case USBPHY_INTERFACE_MODE_ULPI:
1022 tegra_phy->is_ulpi_phy = true;
1023
1024 tegra_phy->reset_gpio =
1025 of_get_named_gpio(np, "nvidia,phy-reset-gpio", 0);
1026 if (!gpio_is_valid(tegra_phy->reset_gpio)) {
1027 dev_err(&pdev->dev, "invalid gpio: %d\n",
1028 tegra_phy->reset_gpio);
1029 return tegra_phy->reset_gpio;
1030 }
1031 tegra_phy->config = NULL;
1032 break;
1033
1034 default:
1035 dev_err(&pdev->dev, "phy_type is invalid or unsupported\n");
1036 return -EINVAL;
1037 }
1038
1039 if (of_find_property(np, "dr_mode", NULL))
1040 tegra_phy->mode = of_usb_get_dr_mode(np);
1041 else
1042 tegra_phy->mode = USB_DR_MODE_HOST;
1043
1044 if (tegra_phy->mode == USB_DR_MODE_UNKNOWN) {
1045 dev_err(&pdev->dev, "dr_mode is invalid\n");
1046 return -EINVAL;
1047 }
1048
1049 /* On some boards, the VBUS regulator doesn't need to be controlled */
1050 if (of_find_property(np, "vbus-supply", NULL)) {
1051 tegra_phy->vbus = devm_regulator_get(&pdev->dev, "vbus");
1052 if (IS_ERR(tegra_phy->vbus))
1053 return PTR_ERR(tegra_phy->vbus);
1054 } else {
1055 dev_notice(&pdev->dev, "no vbus regulator");
1056 tegra_phy->vbus = ERR_PTR(-ENODEV);
1057 }
1058
1059 tegra_phy->u_phy.dev = &pdev->dev;
1060 err = tegra_usb_phy_init(tegra_phy);
1061 if (err < 0)
1062 return err;
1063
1064 tegra_phy->u_phy.shutdown = tegra_usb_phy_close;
1065 tegra_phy->u_phy.set_suspend = tegra_usb_phy_suspend;
1066
1067 platform_set_drvdata(pdev, tegra_phy);
1068
1069 err = usb_add_phy_dev(&tegra_phy->u_phy);
1070 if (err < 0) {
1071 tegra_usb_phy_close(&tegra_phy->u_phy);
1072 return err;
1073 }
1074
1075 return 0;
1076}
1077
1078static int tegra_usb_phy_remove(struct platform_device *pdev)
1079{
1080 struct tegra_usb_phy *tegra_phy = platform_get_drvdata(pdev);
1081
1082 usb_remove_phy(&tegra_phy->u_phy);
1083
1084 return 0;
1085}
1086
1087static struct platform_driver tegra_usb_phy_driver = {
1088 .probe = tegra_usb_phy_probe,
1089 .remove = tegra_usb_phy_remove,
1090 .driver = {
1091 .name = "tegra-phy",
1092 .owner = THIS_MODULE,
1093 .of_match_table = tegra_usb_phy_id_table,
1094 },
1095};
1096module_platform_driver(tegra_usb_phy_driver);
1097
1098MODULE_DESCRIPTION("Tegra USB PHY driver");
1099MODULE_LICENSE("GPL v2");