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1/*
2 * MUSB OTG driver defines
3 *
4 * Copyright 2005 Mentor Graphics Corporation
5 * Copyright (C) 2005-2006 by Texas Instruments
6 * Copyright (C) 2006-2007 Nokia Corporation
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
25 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35#ifndef __MUSB_CORE_H__
36#define __MUSB_CORE_H__
37
38#include <linux/slab.h>
39#include <linux/list.h>
40#include <linux/interrupt.h>
41#include <linux/errno.h>
42#include <linux/timer.h>
43#include <linux/clk.h>
44#include <linux/device.h>
45#include <linux/usb/ch9.h>
46#include <linux/usb/gadget.h>
47#include <linux/usb.h>
48#include <linux/usb/otg.h>
49#include <linux/usb/musb.h>
50
51struct musb;
52struct musb_hw_ep;
53struct musb_ep;
54
55/* Helper defines for struct musb->hwvers */
56#define MUSB_HWVERS_MAJOR(x) ((x >> 10) & 0x1f)
57#define MUSB_HWVERS_MINOR(x) (x & 0x3ff)
58#define MUSB_HWVERS_RC 0x8000
59#define MUSB_HWVERS_1300 0x52C
60#define MUSB_HWVERS_1400 0x590
61#define MUSB_HWVERS_1800 0x720
62#define MUSB_HWVERS_1900 0x784
63#define MUSB_HWVERS_2000 0x800
64
65#include "musb_debug.h"
66#include "musb_dma.h"
67
68#include "musb_io.h"
69#include "musb_regs.h"
70
71#include "musb_gadget.h"
72#include <linux/usb/hcd.h>
73#include "musb_host.h"
74
75#define is_peripheral_enabled(musb) ((musb)->board_mode != MUSB_HOST)
76#define is_host_enabled(musb) ((musb)->board_mode != MUSB_PERIPHERAL)
77#define is_otg_enabled(musb) ((musb)->board_mode == MUSB_OTG)
78
79/* NOTE: otg and peripheral-only state machines start at B_IDLE.
80 * OTG or host-only go to A_IDLE when ID is sensed.
81 */
82#define is_peripheral_active(m) (!(m)->is_host)
83#define is_host_active(m) ((m)->is_host)
84
85#ifndef CONFIG_HAVE_CLK
86/* Dummy stub for clk framework */
87#define clk_get(dev, id) NULL
88#define clk_put(clock) do {} while (0)
89#define clk_enable(clock) do {} while (0)
90#define clk_disable(clock) do {} while (0)
91#endif
92
93#ifdef CONFIG_PROC_FS
94#include <linux/fs.h>
95#define MUSB_CONFIG_PROC_FS
96#endif
97
98/****************************** PERIPHERAL ROLE *****************************/
99
100#define is_peripheral_capable() (1)
101
102extern irqreturn_t musb_g_ep0_irq(struct musb *);
103extern void musb_g_tx(struct musb *, u8);
104extern void musb_g_rx(struct musb *, u8);
105extern void musb_g_reset(struct musb *);
106extern void musb_g_suspend(struct musb *);
107extern void musb_g_resume(struct musb *);
108extern void musb_g_wakeup(struct musb *);
109extern void musb_g_disconnect(struct musb *);
110
111/****************************** HOST ROLE ***********************************/
112
113#define is_host_capable() (1)
114
115extern irqreturn_t musb_h_ep0_irq(struct musb *);
116extern void musb_host_tx(struct musb *, u8);
117extern void musb_host_rx(struct musb *, u8);
118
119/****************************** CONSTANTS ********************************/
120
121#ifndef MUSB_C_NUM_EPS
122#define MUSB_C_NUM_EPS ((u8)16)
123#endif
124
125#ifndef MUSB_MAX_END0_PACKET
126#define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
127#endif
128
129/* host side ep0 states */
130enum musb_h_ep0_state {
131 MUSB_EP0_IDLE,
132 MUSB_EP0_START, /* expect ack of setup */
133 MUSB_EP0_IN, /* expect IN DATA */
134 MUSB_EP0_OUT, /* expect ack of OUT DATA */
135 MUSB_EP0_STATUS, /* expect ack of STATUS */
136} __attribute__ ((packed));
137
138/* peripheral side ep0 states */
139enum musb_g_ep0_state {
140 MUSB_EP0_STAGE_IDLE, /* idle, waiting for SETUP */
141 MUSB_EP0_STAGE_SETUP, /* received SETUP */
142 MUSB_EP0_STAGE_TX, /* IN data */
143 MUSB_EP0_STAGE_RX, /* OUT data */
144 MUSB_EP0_STAGE_STATUSIN, /* (after OUT data) */
145 MUSB_EP0_STAGE_STATUSOUT, /* (after IN data) */
146 MUSB_EP0_STAGE_ACKWAIT, /* after zlp, before statusin */
147} __attribute__ ((packed));
148
149/*
150 * OTG protocol constants. See USB OTG 1.3 spec,
151 * sections 5.5 "Device Timings" and 6.6.5 "Timers".
152 */
153#define OTG_TIME_A_WAIT_VRISE 100 /* msec (max) */
154#define OTG_TIME_A_WAIT_BCON 1100 /* min 1 second */
155#define OTG_TIME_A_AIDL_BDIS 200 /* min 200 msec */
156#define OTG_TIME_B_ASE0_BRST 100 /* min 3.125 ms */
157
158
159/*************************** REGISTER ACCESS ********************************/
160
161/* Endpoint registers (other than dynfifo setup) can be accessed either
162 * directly with the "flat" model, or after setting up an index register.
163 */
164
165#if defined(CONFIG_ARCH_DAVINCI) || defined(CONFIG_SOC_OMAP2430) \
166 || defined(CONFIG_SOC_OMAP3430) || defined(CONFIG_BLACKFIN) \
167 || defined(CONFIG_ARCH_OMAP4)
168/* REVISIT indexed access seemed to
169 * misbehave (on DaVinci) for at least peripheral IN ...
170 */
171#define MUSB_FLAT_REG
172#endif
173
174/* TUSB mapping: "flat" plus ep0 special cases */
175#if defined(CONFIG_USB_MUSB_TUSB6010) || \
176 defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
177#define musb_ep_select(_mbase, _epnum) \
178 musb_writeb((_mbase), MUSB_INDEX, (_epnum))
179#define MUSB_EP_OFFSET MUSB_TUSB_OFFSET
180
181/* "flat" mapping: each endpoint has its own i/o address */
182#elif defined(MUSB_FLAT_REG)
183#define musb_ep_select(_mbase, _epnum) (((void)(_mbase)), ((void)(_epnum)))
184#define MUSB_EP_OFFSET MUSB_FLAT_OFFSET
185
186/* "indexed" mapping: INDEX register controls register bank select */
187#else
188#define musb_ep_select(_mbase, _epnum) \
189 musb_writeb((_mbase), MUSB_INDEX, (_epnum))
190#define MUSB_EP_OFFSET MUSB_INDEXED_OFFSET
191#endif
192
193/****************************** FUNCTIONS ********************************/
194
195#define MUSB_HST_MODE(_musb)\
196 { (_musb)->is_host = true; }
197#define MUSB_DEV_MODE(_musb) \
198 { (_musb)->is_host = false; }
199
200#define test_devctl_hst_mode(_x) \
201 (musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
202
203#define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
204
205/******************************** TYPES *************************************/
206
207/**
208 * struct musb_platform_ops - Operations passed to musb_core by HW glue layer
209 * @init: turns on clocks, sets up platform-specific registers, etc
210 * @exit: undoes @init
211 * @set_mode: forcefully changes operating mode
212 * @try_ilde: tries to idle the IP
213 * @vbus_status: returns vbus status if possible
214 * @set_vbus: forces vbus status
215 * @adjust_channel_params: pre check for standard dma channel_program func
216 */
217struct musb_platform_ops {
218 int (*init)(struct musb *musb);
219 int (*exit)(struct musb *musb);
220
221 void (*enable)(struct musb *musb);
222 void (*disable)(struct musb *musb);
223
224 int (*set_mode)(struct musb *musb, u8 mode);
225 void (*try_idle)(struct musb *musb, unsigned long timeout);
226
227 int (*vbus_status)(struct musb *musb);
228 void (*set_vbus)(struct musb *musb, int on);
229
230 int (*adjust_channel_params)(struct dma_channel *channel,
231 u16 packet_sz, u8 *mode,
232 dma_addr_t *dma_addr, u32 *len);
233};
234
235/*
236 * struct musb_hw_ep - endpoint hardware (bidirectional)
237 *
238 * Ordered slightly for better cacheline locality.
239 */
240struct musb_hw_ep {
241 struct musb *musb;
242 void __iomem *fifo;
243 void __iomem *regs;
244
245#if defined(CONFIG_USB_MUSB_TUSB6010) || \
246 defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
247 void __iomem *conf;
248#endif
249
250 /* index in musb->endpoints[] */
251 u8 epnum;
252
253 /* hardware configuration, possibly dynamic */
254 bool is_shared_fifo;
255 bool tx_double_buffered;
256 bool rx_double_buffered;
257 u16 max_packet_sz_tx;
258 u16 max_packet_sz_rx;
259
260 struct dma_channel *tx_channel;
261 struct dma_channel *rx_channel;
262
263#if defined(CONFIG_USB_MUSB_TUSB6010) || \
264 defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
265 /* TUSB has "asynchronous" and "synchronous" dma modes */
266 dma_addr_t fifo_async;
267 dma_addr_t fifo_sync;
268 void __iomem *fifo_sync_va;
269#endif
270
271 void __iomem *target_regs;
272
273 /* currently scheduled peripheral endpoint */
274 struct musb_qh *in_qh;
275 struct musb_qh *out_qh;
276
277 u8 rx_reinit;
278 u8 tx_reinit;
279
280 /* peripheral side */
281 struct musb_ep ep_in; /* TX */
282 struct musb_ep ep_out; /* RX */
283};
284
285static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep)
286{
287 return next_request(&hw_ep->ep_in);
288}
289
290static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep)
291{
292 return next_request(&hw_ep->ep_out);
293}
294
295struct musb_csr_regs {
296 /* FIFO registers */
297 u16 txmaxp, txcsr, rxmaxp, rxcsr;
298 u16 rxfifoadd, txfifoadd;
299 u8 txtype, txinterval, rxtype, rxinterval;
300 u8 rxfifosz, txfifosz;
301 u8 txfunaddr, txhubaddr, txhubport;
302 u8 rxfunaddr, rxhubaddr, rxhubport;
303};
304
305struct musb_context_registers {
306
307 u8 power;
308 u16 intrtxe, intrrxe;
309 u8 intrusbe;
310 u16 frame;
311 u8 index, testmode;
312
313 u8 devctl, busctl, misc;
314
315 struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
316};
317
318/*
319 * struct musb - Driver instance data.
320 */
321struct musb {
322 /* device lock */
323 spinlock_t lock;
324
325 const struct musb_platform_ops *ops;
326 struct musb_context_registers context;
327
328 irqreturn_t (*isr)(int, void *);
329 struct work_struct irq_work;
330 u16 hwvers;
331
332/* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
333#define MUSB_PORT_STAT_RESUME (1 << 31)
334
335 u32 port1_status;
336
337 unsigned long rh_timer;
338
339 enum musb_h_ep0_state ep0_stage;
340
341 /* bulk traffic normally dedicates endpoint hardware, and each
342 * direction has its own ring of host side endpoints.
343 * we try to progress the transfer at the head of each endpoint's
344 * queue until it completes or NAKs too much; then we try the next
345 * endpoint.
346 */
347 struct musb_hw_ep *bulk_ep;
348
349 struct list_head control; /* of musb_qh */
350 struct list_head in_bulk; /* of musb_qh */
351 struct list_head out_bulk; /* of musb_qh */
352
353 struct timer_list otg_timer;
354 struct notifier_block nb;
355
356 struct dma_controller *dma_controller;
357
358 struct device *controller;
359 void __iomem *ctrl_base;
360 void __iomem *mregs;
361
362#if defined(CONFIG_USB_MUSB_TUSB6010) || \
363 defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
364 dma_addr_t async;
365 dma_addr_t sync;
366 void __iomem *sync_va;
367#endif
368
369 /* passed down from chip/board specific irq handlers */
370 u8 int_usb;
371 u16 int_rx;
372 u16 int_tx;
373
374 struct otg_transceiver *xceiv;
375
376 int nIrq;
377 unsigned irq_wake:1;
378
379 struct musb_hw_ep endpoints[MUSB_C_NUM_EPS];
380#define control_ep endpoints
381
382#define VBUSERR_RETRY_COUNT 3
383 u16 vbuserr_retry;
384 u16 epmask;
385 u8 nr_endpoints;
386
387 u8 board_mode; /* enum musb_mode */
388 int (*board_set_power)(int state);
389
390 u8 min_power; /* vbus for periph, in mA/2 */
391
392 bool is_host;
393
394 int a_wait_bcon; /* VBUS timeout in msecs */
395 unsigned long idle_timeout; /* Next timeout in jiffies */
396
397 /* active means connected and not suspended */
398 unsigned is_active:1;
399
400 unsigned is_multipoint:1;
401 unsigned ignore_disconnect:1; /* during bus resets */
402
403 unsigned hb_iso_rx:1; /* high bandwidth iso rx? */
404 unsigned hb_iso_tx:1; /* high bandwidth iso tx? */
405 unsigned dyn_fifo:1; /* dynamic FIFO supported? */
406
407 unsigned bulk_split:1;
408#define can_bulk_split(musb,type) \
409 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
410
411 unsigned bulk_combine:1;
412#define can_bulk_combine(musb,type) \
413 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
414
415 /* is_suspended means USB B_PERIPHERAL suspend */
416 unsigned is_suspended:1;
417
418 /* may_wakeup means remote wakeup is enabled */
419 unsigned may_wakeup:1;
420
421 /* is_self_powered is reported in device status and the
422 * config descriptor. is_bus_powered means B_PERIPHERAL
423 * draws some VBUS current; both can be true.
424 */
425 unsigned is_self_powered:1;
426 unsigned is_bus_powered:1;
427
428 unsigned set_address:1;
429 unsigned test_mode:1;
430 unsigned softconnect:1;
431
432 u8 address;
433 u8 test_mode_nr;
434 u16 ackpend; /* ep0 */
435 enum musb_g_ep0_state ep0_state;
436 struct usb_gadget g; /* the gadget */
437 struct usb_gadget_driver *gadget_driver; /* its driver */
438
439 /*
440 * FIXME: Remove this flag.
441 *
442 * This is only added to allow Blackfin to work
443 * with current driver. For some unknown reason
444 * Blackfin doesn't work with double buffering
445 * and that's enabled by default.
446 *
447 * We added this flag to forcefully disable double
448 * buffering until we get it working.
449 */
450 unsigned double_buffer_not_ok:1 __deprecated;
451
452 struct musb_hdrc_config *config;
453
454#ifdef MUSB_CONFIG_PROC_FS
455 struct proc_dir_entry *proc_entry;
456#endif
457};
458
459static inline struct musb *gadget_to_musb(struct usb_gadget *g)
460{
461 return container_of(g, struct musb, g);
462}
463
464#ifdef CONFIG_BLACKFIN
465static inline int musb_read_fifosize(struct musb *musb,
466 struct musb_hw_ep *hw_ep, u8 epnum)
467{
468 musb->nr_endpoints++;
469 musb->epmask |= (1 << epnum);
470
471 if (epnum < 5) {
472 hw_ep->max_packet_sz_tx = 128;
473 hw_ep->max_packet_sz_rx = 128;
474 } else {
475 hw_ep->max_packet_sz_tx = 1024;
476 hw_ep->max_packet_sz_rx = 1024;
477 }
478 hw_ep->is_shared_fifo = false;
479
480 return 0;
481}
482
483static inline void musb_configure_ep0(struct musb *musb)
484{
485 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
486 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
487 musb->endpoints[0].is_shared_fifo = true;
488}
489
490#else
491
492static inline int musb_read_fifosize(struct musb *musb,
493 struct musb_hw_ep *hw_ep, u8 epnum)
494{
495 void *mbase = musb->mregs;
496 u8 reg = 0;
497
498 /* read from core using indexed model */
499 reg = musb_readb(mbase, MUSB_EP_OFFSET(epnum, MUSB_FIFOSIZE));
500 /* 0's returned when no more endpoints */
501 if (!reg)
502 return -ENODEV;
503
504 musb->nr_endpoints++;
505 musb->epmask |= (1 << epnum);
506
507 hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
508
509 /* shared TX/RX FIFO? */
510 if ((reg & 0xf0) == 0xf0) {
511 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
512 hw_ep->is_shared_fifo = true;
513 return 0;
514 } else {
515 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
516 hw_ep->is_shared_fifo = false;
517 }
518
519 return 0;
520}
521
522static inline void musb_configure_ep0(struct musb *musb)
523{
524 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
525 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
526 musb->endpoints[0].is_shared_fifo = true;
527}
528#endif /* CONFIG_BLACKFIN */
529
530
531/***************************** Glue it together *****************************/
532
533extern const char musb_driver_name[];
534
535extern void musb_start(struct musb *musb);
536extern void musb_stop(struct musb *musb);
537
538extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
539extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
540
541extern void musb_load_testpacket(struct musb *);
542
543extern irqreturn_t musb_interrupt(struct musb *);
544
545extern void musb_hnp_stop(struct musb *musb);
546
547static inline void musb_platform_set_vbus(struct musb *musb, int is_on)
548{
549 if (musb->ops->set_vbus)
550 musb->ops->set_vbus(musb, is_on);
551}
552
553static inline void musb_platform_enable(struct musb *musb)
554{
555 if (musb->ops->enable)
556 musb->ops->enable(musb);
557}
558
559static inline void musb_platform_disable(struct musb *musb)
560{
561 if (musb->ops->disable)
562 musb->ops->disable(musb);
563}
564
565static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
566{
567 if (!musb->ops->set_mode)
568 return 0;
569
570 return musb->ops->set_mode(musb, mode);
571}
572
573static inline void musb_platform_try_idle(struct musb *musb,
574 unsigned long timeout)
575{
576 if (musb->ops->try_idle)
577 musb->ops->try_idle(musb, timeout);
578}
579
580static inline int musb_platform_get_vbus_status(struct musb *musb)
581{
582 if (!musb->ops->vbus_status)
583 return 0;
584
585 return musb->ops->vbus_status(musb);
586}
587
588static inline int musb_platform_init(struct musb *musb)
589{
590 if (!musb->ops->init)
591 return -EINVAL;
592
593 return musb->ops->init(musb);
594}
595
596static inline int musb_platform_exit(struct musb *musb)
597{
598 if (!musb->ops->exit)
599 return -EINVAL;
600
601 return musb->ops->exit(musb);
602}
603
604#endif /* __MUSB_CORE_H__ */
1/*
2 * MUSB OTG driver defines
3 *
4 * Copyright 2005 Mentor Graphics Corporation
5 * Copyright (C) 2005-2006 by Texas Instruments
6 * Copyright (C) 2006-2007 Nokia Corporation
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
25 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35#ifndef __MUSB_CORE_H__
36#define __MUSB_CORE_H__
37
38#include <linux/slab.h>
39#include <linux/list.h>
40#include <linux/interrupt.h>
41#include <linux/errno.h>
42#include <linux/timer.h>
43#include <linux/device.h>
44#include <linux/usb/ch9.h>
45#include <linux/usb/gadget.h>
46#include <linux/usb.h>
47#include <linux/usb/otg.h>
48#include <linux/usb/musb.h>
49#include <linux/phy/phy.h>
50#include <linux/workqueue.h>
51
52struct musb;
53struct musb_hw_ep;
54struct musb_ep;
55
56/* Helper defines for struct musb->hwvers */
57#define MUSB_HWVERS_MAJOR(x) ((x >> 10) & 0x1f)
58#define MUSB_HWVERS_MINOR(x) (x & 0x3ff)
59#define MUSB_HWVERS_RC 0x8000
60#define MUSB_HWVERS_1300 0x52C
61#define MUSB_HWVERS_1400 0x590
62#define MUSB_HWVERS_1800 0x720
63#define MUSB_HWVERS_1900 0x784
64#define MUSB_HWVERS_2000 0x800
65
66#include "musb_debug.h"
67#include "musb_dma.h"
68
69#include "musb_io.h"
70
71#include "musb_gadget.h"
72#include <linux/usb/hcd.h>
73#include "musb_host.h"
74
75/* NOTE: otg and peripheral-only state machines start at B_IDLE.
76 * OTG or host-only go to A_IDLE when ID is sensed.
77 */
78#define is_peripheral_active(m) (!(m)->is_host)
79#define is_host_active(m) ((m)->is_host)
80
81enum {
82 MUSB_PORT_MODE_HOST = 1,
83 MUSB_PORT_MODE_GADGET,
84 MUSB_PORT_MODE_DUAL_ROLE,
85};
86
87/****************************** CONSTANTS ********************************/
88
89#ifndef MUSB_C_NUM_EPS
90#define MUSB_C_NUM_EPS ((u8)16)
91#endif
92
93#ifndef MUSB_MAX_END0_PACKET
94#define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
95#endif
96
97/* host side ep0 states */
98enum musb_h_ep0_state {
99 MUSB_EP0_IDLE,
100 MUSB_EP0_START, /* expect ack of setup */
101 MUSB_EP0_IN, /* expect IN DATA */
102 MUSB_EP0_OUT, /* expect ack of OUT DATA */
103 MUSB_EP0_STATUS, /* expect ack of STATUS */
104} __attribute__ ((packed));
105
106/* peripheral side ep0 states */
107enum musb_g_ep0_state {
108 MUSB_EP0_STAGE_IDLE, /* idle, waiting for SETUP */
109 MUSB_EP0_STAGE_SETUP, /* received SETUP */
110 MUSB_EP0_STAGE_TX, /* IN data */
111 MUSB_EP0_STAGE_RX, /* OUT data */
112 MUSB_EP0_STAGE_STATUSIN, /* (after OUT data) */
113 MUSB_EP0_STAGE_STATUSOUT, /* (after IN data) */
114 MUSB_EP0_STAGE_ACKWAIT, /* after zlp, before statusin */
115} __attribute__ ((packed));
116
117/*
118 * OTG protocol constants. See USB OTG 1.3 spec,
119 * sections 5.5 "Device Timings" and 6.6.5 "Timers".
120 */
121#define OTG_TIME_A_WAIT_VRISE 100 /* msec (max) */
122#define OTG_TIME_A_WAIT_BCON 1100 /* min 1 second */
123#define OTG_TIME_A_AIDL_BDIS 200 /* min 200 msec */
124#define OTG_TIME_B_ASE0_BRST 100 /* min 3.125 ms */
125
126/****************************** FUNCTIONS ********************************/
127
128#define MUSB_HST_MODE(_musb)\
129 { (_musb)->is_host = true; }
130#define MUSB_DEV_MODE(_musb) \
131 { (_musb)->is_host = false; }
132
133#define test_devctl_hst_mode(_x) \
134 (musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
135
136#define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
137
138/******************************** TYPES *************************************/
139
140struct musb_io;
141
142/**
143 * struct musb_platform_ops - Operations passed to musb_core by HW glue layer
144 * @quirks: flags for platform specific quirks
145 * @enable: enable device
146 * @disable: disable device
147 * @ep_offset: returns the end point offset
148 * @ep_select: selects the specified end point
149 * @fifo_mode: sets the fifo mode
150 * @fifo_offset: returns the fifo offset
151 * @readb: read 8 bits
152 * @writeb: write 8 bits
153 * @readw: read 16 bits
154 * @writew: write 16 bits
155 * @readl: read 32 bits
156 * @writel: write 32 bits
157 * @read_fifo: reads the fifo
158 * @write_fifo: writes to fifo
159 * @dma_init: platform specific dma init function
160 * @dma_exit: platform specific dma exit function
161 * @init: turns on clocks, sets up platform-specific registers, etc
162 * @exit: undoes @init
163 * @set_mode: forcefully changes operating mode
164 * @try_idle: tries to idle the IP
165 * @recover: platform-specific babble recovery
166 * @vbus_status: returns vbus status if possible
167 * @set_vbus: forces vbus status
168 * @adjust_channel_params: pre check for standard dma channel_program func
169 * @pre_root_reset_end: called before the root usb port reset flag gets cleared
170 * @post_root_reset_end: called after the root usb port reset flag gets cleared
171 * @phy_callback: optional callback function for the phy to call
172 */
173struct musb_platform_ops {
174
175#define MUSB_DMA_UX500 BIT(6)
176#define MUSB_DMA_CPPI41 BIT(5)
177#define MUSB_DMA_CPPI BIT(4)
178#define MUSB_DMA_TUSB_OMAP BIT(3)
179#define MUSB_DMA_INVENTRA BIT(2)
180#define MUSB_IN_TUSB BIT(1)
181#define MUSB_INDEXED_EP BIT(0)
182 u32 quirks;
183
184 int (*init)(struct musb *musb);
185 int (*exit)(struct musb *musb);
186
187 void (*enable)(struct musb *musb);
188 void (*disable)(struct musb *musb);
189
190 u32 (*ep_offset)(u8 epnum, u16 offset);
191 void (*ep_select)(void __iomem *mbase, u8 epnum);
192 u16 fifo_mode;
193 u32 (*fifo_offset)(u8 epnum);
194 u32 (*busctl_offset)(u8 epnum, u16 offset);
195 u8 (*readb)(const void __iomem *addr, unsigned offset);
196 void (*writeb)(void __iomem *addr, unsigned offset, u8 data);
197 u16 (*readw)(const void __iomem *addr, unsigned offset);
198 void (*writew)(void __iomem *addr, unsigned offset, u16 data);
199 u32 (*readl)(const void __iomem *addr, unsigned offset);
200 void (*writel)(void __iomem *addr, unsigned offset, u32 data);
201 void (*read_fifo)(struct musb_hw_ep *hw_ep, u16 len, u8 *buf);
202 void (*write_fifo)(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf);
203 struct dma_controller *
204 (*dma_init) (struct musb *musb, void __iomem *base);
205 void (*dma_exit)(struct dma_controller *c);
206 int (*set_mode)(struct musb *musb, u8 mode);
207 void (*try_idle)(struct musb *musb, unsigned long timeout);
208 int (*recover)(struct musb *musb);
209
210 int (*vbus_status)(struct musb *musb);
211 void (*set_vbus)(struct musb *musb, int on);
212
213 int (*adjust_channel_params)(struct dma_channel *channel,
214 u16 packet_sz, u8 *mode,
215 dma_addr_t *dma_addr, u32 *len);
216 void (*pre_root_reset_end)(struct musb *musb);
217 void (*post_root_reset_end)(struct musb *musb);
218 void (*phy_callback)(enum musb_vbus_id_status status);
219};
220
221/*
222 * struct musb_hw_ep - endpoint hardware (bidirectional)
223 *
224 * Ordered slightly for better cacheline locality.
225 */
226struct musb_hw_ep {
227 struct musb *musb;
228 void __iomem *fifo;
229 void __iomem *regs;
230
231#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
232 void __iomem *conf;
233#endif
234
235 /* index in musb->endpoints[] */
236 u8 epnum;
237
238 /* hardware configuration, possibly dynamic */
239 bool is_shared_fifo;
240 bool tx_double_buffered;
241 bool rx_double_buffered;
242 u16 max_packet_sz_tx;
243 u16 max_packet_sz_rx;
244
245 struct dma_channel *tx_channel;
246 struct dma_channel *rx_channel;
247
248#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
249 /* TUSB has "asynchronous" and "synchronous" dma modes */
250 dma_addr_t fifo_async;
251 dma_addr_t fifo_sync;
252 void __iomem *fifo_sync_va;
253#endif
254
255 /* currently scheduled peripheral endpoint */
256 struct musb_qh *in_qh;
257 struct musb_qh *out_qh;
258
259 u8 rx_reinit;
260 u8 tx_reinit;
261
262 /* peripheral side */
263 struct musb_ep ep_in; /* TX */
264 struct musb_ep ep_out; /* RX */
265};
266
267static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep)
268{
269 return next_request(&hw_ep->ep_in);
270}
271
272static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep)
273{
274 return next_request(&hw_ep->ep_out);
275}
276
277struct musb_csr_regs {
278 /* FIFO registers */
279 u16 txmaxp, txcsr, rxmaxp, rxcsr;
280 u16 rxfifoadd, txfifoadd;
281 u8 txtype, txinterval, rxtype, rxinterval;
282 u8 rxfifosz, txfifosz;
283 u8 txfunaddr, txhubaddr, txhubport;
284 u8 rxfunaddr, rxhubaddr, rxhubport;
285};
286
287struct musb_context_registers {
288
289 u8 power;
290 u8 intrusbe;
291 u16 frame;
292 u8 index, testmode;
293
294 u8 devctl, busctl, misc;
295 u32 otg_interfsel;
296
297 struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
298};
299
300/*
301 * struct musb - Driver instance data.
302 */
303struct musb {
304 /* device lock */
305 spinlock_t lock;
306
307 struct musb_io io;
308 const struct musb_platform_ops *ops;
309 struct musb_context_registers context;
310
311 irqreturn_t (*isr)(int, void *);
312 struct work_struct irq_work;
313 struct delayed_work deassert_reset_work;
314 struct delayed_work finish_resume_work;
315 u16 hwvers;
316
317 u16 intrrxe;
318 u16 intrtxe;
319/* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
320#define MUSB_PORT_STAT_RESUME (1 << 31)
321
322 u32 port1_status;
323
324 unsigned long rh_timer;
325
326 enum musb_h_ep0_state ep0_stage;
327
328 /* bulk traffic normally dedicates endpoint hardware, and each
329 * direction has its own ring of host side endpoints.
330 * we try to progress the transfer at the head of each endpoint's
331 * queue until it completes or NAKs too much; then we try the next
332 * endpoint.
333 */
334 struct musb_hw_ep *bulk_ep;
335
336 struct list_head control; /* of musb_qh */
337 struct list_head in_bulk; /* of musb_qh */
338 struct list_head out_bulk; /* of musb_qh */
339
340 struct timer_list otg_timer;
341 struct notifier_block nb;
342
343 struct dma_controller *dma_controller;
344
345 struct device *controller;
346 void __iomem *ctrl_base;
347 void __iomem *mregs;
348
349#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
350 dma_addr_t async;
351 dma_addr_t sync;
352 void __iomem *sync_va;
353 u8 tusb_revision;
354#endif
355
356 /* passed down from chip/board specific irq handlers */
357 u8 int_usb;
358 u16 int_rx;
359 u16 int_tx;
360
361 struct usb_phy *xceiv;
362 struct phy *phy;
363
364 int nIrq;
365 unsigned irq_wake:1;
366
367 struct musb_hw_ep endpoints[MUSB_C_NUM_EPS];
368#define control_ep endpoints
369
370#define VBUSERR_RETRY_COUNT 3
371 u16 vbuserr_retry;
372 u16 epmask;
373 u8 nr_endpoints;
374
375 int (*board_set_power)(int state);
376
377 u8 min_power; /* vbus for periph, in mA/2 */
378
379 int port_mode; /* MUSB_PORT_MODE_* */
380 bool is_host;
381
382 int a_wait_bcon; /* VBUS timeout in msecs */
383 unsigned long idle_timeout; /* Next timeout in jiffies */
384
385 /* active means connected and not suspended */
386 unsigned is_active:1;
387
388 unsigned is_multipoint:1;
389
390 unsigned hb_iso_rx:1; /* high bandwidth iso rx? */
391 unsigned hb_iso_tx:1; /* high bandwidth iso tx? */
392 unsigned dyn_fifo:1; /* dynamic FIFO supported? */
393
394 unsigned bulk_split:1;
395#define can_bulk_split(musb,type) \
396 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
397
398 unsigned bulk_combine:1;
399#define can_bulk_combine(musb,type) \
400 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
401
402 /* is_suspended means USB B_PERIPHERAL suspend */
403 unsigned is_suspended:1;
404 unsigned need_finish_resume :1;
405
406 /* may_wakeup means remote wakeup is enabled */
407 unsigned may_wakeup:1;
408
409 /* is_self_powered is reported in device status and the
410 * config descriptor. is_bus_powered means B_PERIPHERAL
411 * draws some VBUS current; both can be true.
412 */
413 unsigned is_self_powered:1;
414 unsigned is_bus_powered:1;
415
416 unsigned set_address:1;
417 unsigned test_mode:1;
418 unsigned softconnect:1;
419
420 u8 address;
421 u8 test_mode_nr;
422 u16 ackpend; /* ep0 */
423 enum musb_g_ep0_state ep0_state;
424 struct usb_gadget g; /* the gadget */
425 struct usb_gadget_driver *gadget_driver; /* its driver */
426 struct usb_hcd *hcd; /* the usb hcd */
427
428 /*
429 * FIXME: Remove this flag.
430 *
431 * This is only added to allow Blackfin to work
432 * with current driver. For some unknown reason
433 * Blackfin doesn't work with double buffering
434 * and that's enabled by default.
435 *
436 * We added this flag to forcefully disable double
437 * buffering until we get it working.
438 */
439 unsigned double_buffer_not_ok:1;
440
441 const struct musb_hdrc_config *config;
442
443 int xceiv_old_state;
444#ifdef CONFIG_DEBUG_FS
445 struct dentry *debugfs_root;
446#endif
447};
448
449/* This must be included after struct musb is defined */
450#include "musb_regs.h"
451
452static inline struct musb *gadget_to_musb(struct usb_gadget *g)
453{
454 return container_of(g, struct musb, g);
455}
456
457#ifdef CONFIG_BLACKFIN
458static inline int musb_read_fifosize(struct musb *musb,
459 struct musb_hw_ep *hw_ep, u8 epnum)
460{
461 musb->nr_endpoints++;
462 musb->epmask |= (1 << epnum);
463
464 if (epnum < 5) {
465 hw_ep->max_packet_sz_tx = 128;
466 hw_ep->max_packet_sz_rx = 128;
467 } else {
468 hw_ep->max_packet_sz_tx = 1024;
469 hw_ep->max_packet_sz_rx = 1024;
470 }
471 hw_ep->is_shared_fifo = false;
472
473 return 0;
474}
475
476static inline void musb_configure_ep0(struct musb *musb)
477{
478 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
479 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
480 musb->endpoints[0].is_shared_fifo = true;
481}
482
483#else
484
485static inline int musb_read_fifosize(struct musb *musb,
486 struct musb_hw_ep *hw_ep, u8 epnum)
487{
488 void __iomem *mbase = musb->mregs;
489 u8 reg = 0;
490
491 /* read from core using indexed model */
492 reg = musb_readb(mbase, musb->io.ep_offset(epnum, MUSB_FIFOSIZE));
493 /* 0's returned when no more endpoints */
494 if (!reg)
495 return -ENODEV;
496
497 musb->nr_endpoints++;
498 musb->epmask |= (1 << epnum);
499
500 hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
501
502 /* shared TX/RX FIFO? */
503 if ((reg & 0xf0) == 0xf0) {
504 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
505 hw_ep->is_shared_fifo = true;
506 return 0;
507 } else {
508 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
509 hw_ep->is_shared_fifo = false;
510 }
511
512 return 0;
513}
514
515static inline void musb_configure_ep0(struct musb *musb)
516{
517 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
518 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
519 musb->endpoints[0].is_shared_fifo = true;
520}
521#endif /* CONFIG_BLACKFIN */
522
523
524/***************************** Glue it together *****************************/
525
526extern const char musb_driver_name[];
527
528extern void musb_stop(struct musb *musb);
529extern void musb_start(struct musb *musb);
530
531extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
532extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
533
534extern void musb_load_testpacket(struct musb *);
535
536extern irqreturn_t musb_interrupt(struct musb *);
537
538extern void musb_hnp_stop(struct musb *musb);
539
540static inline void musb_platform_set_vbus(struct musb *musb, int is_on)
541{
542 if (musb->ops->set_vbus)
543 musb->ops->set_vbus(musb, is_on);
544}
545
546static inline void musb_platform_enable(struct musb *musb)
547{
548 if (musb->ops->enable)
549 musb->ops->enable(musb);
550}
551
552static inline void musb_platform_disable(struct musb *musb)
553{
554 if (musb->ops->disable)
555 musb->ops->disable(musb);
556}
557
558static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
559{
560 if (!musb->ops->set_mode)
561 return 0;
562
563 return musb->ops->set_mode(musb, mode);
564}
565
566static inline void musb_platform_try_idle(struct musb *musb,
567 unsigned long timeout)
568{
569 if (musb->ops->try_idle)
570 musb->ops->try_idle(musb, timeout);
571}
572
573static inline int musb_platform_recover(struct musb *musb)
574{
575 if (!musb->ops->recover)
576 return 0;
577
578 return musb->ops->recover(musb);
579}
580
581static inline int musb_platform_get_vbus_status(struct musb *musb)
582{
583 if (!musb->ops->vbus_status)
584 return -EINVAL;
585
586 return musb->ops->vbus_status(musb);
587}
588
589static inline int musb_platform_init(struct musb *musb)
590{
591 if (!musb->ops->init)
592 return -EINVAL;
593
594 return musb->ops->init(musb);
595}
596
597static inline int musb_platform_exit(struct musb *musb)
598{
599 if (!musb->ops->exit)
600 return -EINVAL;
601
602 return musb->ops->exit(musb);
603}
604
605static inline void musb_platform_pre_root_reset_end(struct musb *musb)
606{
607 if (musb->ops->pre_root_reset_end)
608 musb->ops->pre_root_reset_end(musb);
609}
610
611static inline void musb_platform_post_root_reset_end(struct musb *musb)
612{
613 if (musb->ops->post_root_reset_end)
614 musb->ops->post_root_reset_end(musb);
615}
616
617#endif /* __MUSB_CORE_H__ */