blob: 94eb2923afed03d58578bd9ea89af50116206a35 [file] [log] [blame]
Li Yang0807c502011-04-18 22:01:59 +02001/*
2 * Copyright (C) 2007,2008 Freescale semiconductor, Inc.
3 *
4 * Author: Li Yang <LeoLi@freescale.com>
5 * Jerry Huang <Chang-Ming.Huang@freescale.com>
6 *
7 * Initialization based on code from Shlomi Gridish.
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#include <linux/module.h>
25#include <linux/kernel.h>
26#include <linux/delay.h>
27#include <linux/slab.h>
28#include <linux/proc_fs.h>
29#include <linux/errno.h>
Li Yang0807c502011-04-18 22:01:59 +020030#include <linux/interrupt.h>
31#include <linux/io.h>
32#include <linux/timer.h>
33#include <linux/usb.h>
34#include <linux/device.h>
35#include <linux/usb/ch9.h>
36#include <linux/usb/gadget.h>
37#include <linux/workqueue.h>
38#include <linux/time.h>
39#include <linux/fsl_devices.h>
40#include <linux/platform_device.h>
41#include <linux/uaccess.h>
42
43#include <asm/unaligned.h>
44
Felipe Balbi94ae9842013-03-07 17:37:59 +020045#include "phy-fsl-usb.h"
Li Yang0807c502011-04-18 22:01:59 +020046
47#define DRIVER_VERSION "Rev. 1.55"
48#define DRIVER_AUTHOR "Jerry Huang/Li Yang"
49#define DRIVER_DESC "Freescale USB OTG Transceiver Driver"
50#define DRIVER_INFO DRIVER_DESC " " DRIVER_VERSION
51
52static const char driver_name[] = "fsl-usb2-otg";
53
54const pm_message_t otg_suspend_state = {
55 .event = 1,
56};
57
58#define HA_DATA_PULSE
59
60static struct usb_dr_mmap *usb_dr_regs;
61static struct fsl_otg *fsl_otg_dev;
62static int srp_wait_done;
63
64/* FSM timers */
65struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, *a_aidl_bdis_tmr,
66 *b_ase0_brst_tmr, *b_se0_srp_tmr;
67
68/* Driver specific timers */
69struct fsl_otg_timer *b_data_pulse_tmr, *b_vbus_pulse_tmr, *b_srp_fail_tmr,
70 *b_srp_wait_tmr, *a_wait_enum_tmr;
71
72static struct list_head active_timers;
73
74static struct fsl_otg_config fsl_otg_initdata = {
75 .otg_port = 1,
76};
77
78#ifdef CONFIG_PPC32
79static u32 _fsl_readl_be(const unsigned __iomem *p)
80{
81 return in_be32(p);
82}
83
84static u32 _fsl_readl_le(const unsigned __iomem *p)
85{
86 return in_le32(p);
87}
88
89static void _fsl_writel_be(u32 v, unsigned __iomem *p)
90{
91 out_be32(p, v);
92}
93
94static void _fsl_writel_le(u32 v, unsigned __iomem *p)
95{
96 out_le32(p, v);
97}
98
99static u32 (*_fsl_readl)(const unsigned __iomem *p);
100static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
101
102#define fsl_readl(p) (*_fsl_readl)((p))
103#define fsl_writel(v, p) (*_fsl_writel)((v), (p))
104
105#else
106#define fsl_readl(addr) readl(addr)
107#define fsl_writel(val, addr) writel(val, addr)
108#endif /* CONFIG_PPC32 */
109
Li Yang0807c502011-04-18 22:01:59 +0200110int write_ulpi(u8 addr, u8 data)
111{
112 u32 temp;
113
114 temp = 0x60000000 | (addr << 16) | data;
115 fsl_writel(temp, &usb_dr_regs->ulpiview);
116 return 0;
117}
118
119/* -------------------------------------------------------------*/
120/* Operations that will be called from OTG Finite State Machine */
121
122/* Charge vbus for vbus pulsing in SRP */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900123void fsl_otg_chrg_vbus(struct otg_fsm *fsm, int on)
Li Yang0807c502011-04-18 22:01:59 +0200124{
125 u32 tmp;
126
127 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
128
129 if (on)
130 /* stop discharging, start charging */
131 tmp = (tmp & ~OTGSC_CTRL_VBUS_DISCHARGE) |
132 OTGSC_CTRL_VBUS_CHARGE;
133 else
134 /* stop charging */
135 tmp &= ~OTGSC_CTRL_VBUS_CHARGE;
136
137 fsl_writel(tmp, &usb_dr_regs->otgsc);
138}
139
140/* Discharge vbus through a resistor to ground */
141void fsl_otg_dischrg_vbus(int on)
142{
143 u32 tmp;
144
145 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
146
147 if (on)
148 /* stop charging, start discharging */
149 tmp = (tmp & ~OTGSC_CTRL_VBUS_CHARGE) |
150 OTGSC_CTRL_VBUS_DISCHARGE;
151 else
152 /* stop discharging */
153 tmp &= ~OTGSC_CTRL_VBUS_DISCHARGE;
154
155 fsl_writel(tmp, &usb_dr_regs->otgsc);
156}
157
158/* A-device driver vbus, controlled through PP bit in PORTSC */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900159void fsl_otg_drv_vbus(struct otg_fsm *fsm, int on)
Li Yang0807c502011-04-18 22:01:59 +0200160{
161 u32 tmp;
162
163 if (on) {
164 tmp = fsl_readl(&usb_dr_regs->portsc) & ~PORTSC_W1C_BITS;
165 fsl_writel(tmp | PORTSC_PORT_POWER, &usb_dr_regs->portsc);
166 } else {
167 tmp = fsl_readl(&usb_dr_regs->portsc) &
168 ~PORTSC_W1C_BITS & ~PORTSC_PORT_POWER;
169 fsl_writel(tmp, &usb_dr_regs->portsc);
170 }
171}
172
173/*
174 * Pull-up D+, signalling connect by periperal. Also used in
175 * data-line pulsing in SRP
176 */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900177void fsl_otg_loc_conn(struct otg_fsm *fsm, int on)
Li Yang0807c502011-04-18 22:01:59 +0200178{
179 u32 tmp;
180
181 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
182
183 if (on)
184 tmp |= OTGSC_CTRL_DATA_PULSING;
185 else
186 tmp &= ~OTGSC_CTRL_DATA_PULSING;
187
188 fsl_writel(tmp, &usb_dr_regs->otgsc);
189}
190
191/*
192 * Generate SOF by host. This is controlled through suspend/resume the
193 * port. In host mode, controller will automatically send SOF.
194 * Suspend will block the data on the port.
195 */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900196void fsl_otg_loc_sof(struct otg_fsm *fsm, int on)
Li Yang0807c502011-04-18 22:01:59 +0200197{
198 u32 tmp;
199
200 tmp = fsl_readl(&fsl_otg_dev->dr_mem_map->portsc) & ~PORTSC_W1C_BITS;
201 if (on)
202 tmp |= PORTSC_PORT_FORCE_RESUME;
203 else
204 tmp |= PORTSC_PORT_SUSPEND;
205
206 fsl_writel(tmp, &fsl_otg_dev->dr_mem_map->portsc);
207
208}
209
210/* Start SRP pulsing by data-line pulsing, followed with v-bus pulsing. */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900211void fsl_otg_start_pulse(struct otg_fsm *fsm)
Li Yang0807c502011-04-18 22:01:59 +0200212{
213 u32 tmp;
214
215 srp_wait_done = 0;
216#ifdef HA_DATA_PULSE
217 tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK;
218 tmp |= OTGSC_HA_DATA_PULSE;
219 fsl_writel(tmp, &usb_dr_regs->otgsc);
220#else
221 fsl_otg_loc_conn(1);
222#endif
223
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900224 fsl_otg_add_timer(fsm, b_data_pulse_tmr);
Li Yang0807c502011-04-18 22:01:59 +0200225}
226
227void b_data_pulse_end(unsigned long foo)
228{
229#ifdef HA_DATA_PULSE
230#else
231 fsl_otg_loc_conn(0);
232#endif
233
234 /* Do VBUS pulse after data pulse */
235 fsl_otg_pulse_vbus();
236}
237
238void fsl_otg_pulse_vbus(void)
239{
240 srp_wait_done = 0;
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900241 fsl_otg_chrg_vbus(&fsl_otg_dev->fsm, 1);
Li Yang0807c502011-04-18 22:01:59 +0200242 /* start the timer to end vbus charge */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900243 fsl_otg_add_timer(&fsl_otg_dev->fsm, b_vbus_pulse_tmr);
Li Yang0807c502011-04-18 22:01:59 +0200244}
245
246void b_vbus_pulse_end(unsigned long foo)
247{
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900248 fsl_otg_chrg_vbus(&fsl_otg_dev->fsm, 0);
Li Yang0807c502011-04-18 22:01:59 +0200249
250 /*
251 * As USB3300 using the same a_sess_vld and b_sess_vld voltage
252 * we need to discharge the bus for a while to distinguish
253 * residual voltage of vbus pulsing and A device pull up
254 */
255 fsl_otg_dischrg_vbus(1);
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900256 fsl_otg_add_timer(&fsl_otg_dev->fsm, b_srp_wait_tmr);
Li Yang0807c502011-04-18 22:01:59 +0200257}
258
259void b_srp_end(unsigned long foo)
260{
261 fsl_otg_dischrg_vbus(0);
262 srp_wait_done = 1;
263
Felipe Balbie5ba1c02014-11-12 08:31:40 -0600264 if ((fsl_otg_dev->phy.otg->state == OTG_STATE_B_SRP_INIT) &&
Li Yang0807c502011-04-18 22:01:59 +0200265 fsl_otg_dev->fsm.b_sess_vld)
266 fsl_otg_dev->fsm.b_srp_done = 1;
267}
268
269/*
270 * Workaround for a_host suspending too fast. When a_bus_req=0,
271 * a_host will start by SRP. It needs to set b_hnp_enable before
272 * actually suspending to start HNP
273 */
274void a_wait_enum(unsigned long foo)
275{
276 VDBG("a_wait_enum timeout\n");
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200277 if (!fsl_otg_dev->phy.otg->host->b_hnp_enable)
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900278 fsl_otg_add_timer(&fsl_otg_dev->fsm, a_wait_enum_tmr);
Li Yang0807c502011-04-18 22:01:59 +0200279 else
280 otg_statemachine(&fsl_otg_dev->fsm);
281}
282
283/* The timeout callback function to set time out bit */
284void set_tmout(unsigned long indicator)
285{
286 *(int *)indicator = 1;
287}
288
289/* Initialize timers */
290int fsl_otg_init_timers(struct otg_fsm *fsm)
291{
292 /* FSM used timers */
293 a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE,
294 (unsigned long)&fsm->a_wait_vrise_tmout);
295 if (!a_wait_vrise_tmr)
296 return -ENOMEM;
297
298 a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON,
299 (unsigned long)&fsm->a_wait_bcon_tmout);
300 if (!a_wait_bcon_tmr)
301 return -ENOMEM;
302
303 a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS,
304 (unsigned long)&fsm->a_aidl_bdis_tmout);
305 if (!a_aidl_bdis_tmr)
306 return -ENOMEM;
307
308 b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST,
309 (unsigned long)&fsm->b_ase0_brst_tmout);
310 if (!b_ase0_brst_tmr)
311 return -ENOMEM;
312
313 b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP,
314 (unsigned long)&fsm->b_se0_srp);
315 if (!b_se0_srp_tmr)
316 return -ENOMEM;
317
318 b_srp_fail_tmr = otg_timer_initializer(&set_tmout, TB_SRP_FAIL,
319 (unsigned long)&fsm->b_srp_done);
320 if (!b_srp_fail_tmr)
321 return -ENOMEM;
322
323 a_wait_enum_tmr = otg_timer_initializer(&a_wait_enum, 10,
324 (unsigned long)&fsm);
325 if (!a_wait_enum_tmr)
326 return -ENOMEM;
327
328 /* device driver used timers */
329 b_srp_wait_tmr = otg_timer_initializer(&b_srp_end, TB_SRP_WAIT, 0);
330 if (!b_srp_wait_tmr)
331 return -ENOMEM;
332
333 b_data_pulse_tmr = otg_timer_initializer(&b_data_pulse_end,
334 TB_DATA_PLS, 0);
335 if (!b_data_pulse_tmr)
336 return -ENOMEM;
337
338 b_vbus_pulse_tmr = otg_timer_initializer(&b_vbus_pulse_end,
339 TB_VBUS_PLS, 0);
340 if (!b_vbus_pulse_tmr)
341 return -ENOMEM;
342
343 return 0;
344}
345
346/* Uninitialize timers */
347void fsl_otg_uninit_timers(void)
348{
349 /* FSM used timers */
Syam Sidhardhan5f717912013-03-06 01:04:50 +0530350 kfree(a_wait_vrise_tmr);
351 kfree(a_wait_bcon_tmr);
352 kfree(a_aidl_bdis_tmr);
353 kfree(b_ase0_brst_tmr);
354 kfree(b_se0_srp_tmr);
355 kfree(b_srp_fail_tmr);
356 kfree(a_wait_enum_tmr);
Li Yang0807c502011-04-18 22:01:59 +0200357
358 /* device driver used timers */
Syam Sidhardhan5f717912013-03-06 01:04:50 +0530359 kfree(b_srp_wait_tmr);
360 kfree(b_data_pulse_tmr);
361 kfree(b_vbus_pulse_tmr);
Li Yang0807c502011-04-18 22:01:59 +0200362}
363
Anton Tikhomirovf6de27e2013-10-03 12:42:04 +0900364static struct fsl_otg_timer *fsl_otg_get_timer(enum otg_fsm_timer t)
365{
366 struct fsl_otg_timer *timer;
367
368 /* REVISIT: use array of pointers to timers instead */
369 switch (t) {
370 case A_WAIT_VRISE:
371 timer = a_wait_vrise_tmr;
372 break;
373 case A_WAIT_BCON:
374 timer = a_wait_vrise_tmr;
375 break;
376 case A_AIDL_BDIS:
377 timer = a_wait_vrise_tmr;
378 break;
379 case B_ASE0_BRST:
380 timer = a_wait_vrise_tmr;
381 break;
382 case B_SE0_SRP:
383 timer = a_wait_vrise_tmr;
384 break;
385 case B_SRP_FAIL:
386 timer = a_wait_vrise_tmr;
387 break;
388 case A_WAIT_ENUM:
389 timer = a_wait_vrise_tmr;
390 break;
391 default:
392 timer = NULL;
393 }
394
395 return timer;
396}
397
Li Yang0807c502011-04-18 22:01:59 +0200398/* Add timer to timer list */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900399void fsl_otg_add_timer(struct otg_fsm *fsm, void *gtimer)
Li Yang0807c502011-04-18 22:01:59 +0200400{
401 struct fsl_otg_timer *timer = gtimer;
402 struct fsl_otg_timer *tmp_timer;
403
404 /*
405 * Check if the timer is already in the active list,
406 * if so update timer count
407 */
408 list_for_each_entry(tmp_timer, &active_timers, list)
409 if (tmp_timer == timer) {
410 timer->count = timer->expires;
411 return;
412 }
413 timer->count = timer->expires;
414 list_add_tail(&timer->list, &active_timers);
415}
416
Anton Tikhomirovf6de27e2013-10-03 12:42:04 +0900417static void fsl_otg_fsm_add_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
418{
419 struct fsl_otg_timer *timer;
420
421 timer = fsl_otg_get_timer(t);
422 if (!timer)
423 return;
424
425 fsl_otg_add_timer(fsm, timer);
426}
427
Li Yang0807c502011-04-18 22:01:59 +0200428/* Remove timer from the timer list; clear timeout status */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900429void fsl_otg_del_timer(struct otg_fsm *fsm, void *gtimer)
Li Yang0807c502011-04-18 22:01:59 +0200430{
431 struct fsl_otg_timer *timer = gtimer;
432 struct fsl_otg_timer *tmp_timer, *del_tmp;
433
434 list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list)
435 if (tmp_timer == timer)
436 list_del(&timer->list);
437}
438
Anton Tikhomirovf6de27e2013-10-03 12:42:04 +0900439static void fsl_otg_fsm_del_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
440{
441 struct fsl_otg_timer *timer;
442
443 timer = fsl_otg_get_timer(t);
444 if (!timer)
445 return;
446
447 fsl_otg_del_timer(fsm, timer);
448}
449
Li Yang0807c502011-04-18 22:01:59 +0200450/* Reset controller, not reset the bus */
451void otg_reset_controller(void)
452{
453 u32 command;
454
455 command = fsl_readl(&usb_dr_regs->usbcmd);
456 command |= (1 << 1);
457 fsl_writel(command, &usb_dr_regs->usbcmd);
458 while (fsl_readl(&usb_dr_regs->usbcmd) & (1 << 1))
459 ;
460}
461
462/* Call suspend/resume routines in host driver */
463int fsl_otg_start_host(struct otg_fsm *fsm, int on)
464{
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200465 struct usb_otg *otg = fsm->otg;
Li Yang0807c502011-04-18 22:01:59 +0200466 struct device *dev;
Antoine Tenart19c1eac2014-10-30 18:41:14 +0100467 struct fsl_otg *otg_dev =
468 container_of(otg->usb_phy, struct fsl_otg, phy);
Li Yang0807c502011-04-18 22:01:59 +0200469 u32 retval = 0;
470
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200471 if (!otg->host)
Li Yang0807c502011-04-18 22:01:59 +0200472 return -ENODEV;
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200473 dev = otg->host->controller;
Li Yang0807c502011-04-18 22:01:59 +0200474
475 /*
476 * Update a_vbus_vld state as a_vbus_vld int is disabled
477 * in device mode
478 */
479 fsm->a_vbus_vld =
480 !!(fsl_readl(&usb_dr_regs->otgsc) & OTGSC_STS_A_VBUS_VALID);
481 if (on) {
482 /* start fsl usb host controller */
483 if (otg_dev->host_working)
484 goto end;
485 else {
486 otg_reset_controller();
487 VDBG("host on......\n");
488 if (dev->driver->pm && dev->driver->pm->resume) {
489 retval = dev->driver->pm->resume(dev);
490 if (fsm->id) {
491 /* default-b */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900492 fsl_otg_drv_vbus(fsm, 1);
Li Yang0807c502011-04-18 22:01:59 +0200493 /*
494 * Workaround: b_host can't driver
495 * vbus, but PP in PORTSC needs to
496 * be 1 for host to work.
497 * So we set drv_vbus bit in
498 * transceiver to 0 thru ULPI.
499 */
500 write_ulpi(0x0c, 0x20);
501 }
502 }
503
504 otg_dev->host_working = 1;
505 }
506 } else {
507 /* stop fsl usb host controller */
508 if (!otg_dev->host_working)
509 goto end;
510 else {
511 VDBG("host off......\n");
512 if (dev && dev->driver) {
513 if (dev->driver->pm && dev->driver->pm->suspend)
514 retval = dev->driver->pm->suspend(dev);
515 if (fsm->id)
516 /* default-b */
Anton Tikhomirovda8cc162013-10-03 12:42:04 +0900517 fsl_otg_drv_vbus(fsm, 0);
Li Yang0807c502011-04-18 22:01:59 +0200518 }
519 otg_dev->host_working = 0;
520 }
521 }
522end:
523 return retval;
524}
525
526/*
527 * Call suspend and resume function in udc driver
528 * to stop and start udc driver.
529 */
530int fsl_otg_start_gadget(struct otg_fsm *fsm, int on)
531{
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200532 struct usb_otg *otg = fsm->otg;
Li Yang0807c502011-04-18 22:01:59 +0200533 struct device *dev;
534
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200535 if (!otg->gadget || !otg->gadget->dev.parent)
Li Yang0807c502011-04-18 22:01:59 +0200536 return -ENODEV;
537
538 VDBG("gadget %s\n", on ? "on" : "off");
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200539 dev = otg->gadget->dev.parent;
Li Yang0807c502011-04-18 22:01:59 +0200540
541 if (on) {
542 if (dev->driver->resume)
543 dev->driver->resume(dev);
544 } else {
545 if (dev->driver->suspend)
546 dev->driver->suspend(dev, otg_suspend_state);
547 }
548
549 return 0;
550}
551
552/*
553 * Called by initialization code of host driver. Register host controller
554 * to the OTG. Suspend host for OTG role detection.
555 */
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200556static int fsl_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
Li Yang0807c502011-04-18 22:01:59 +0200557{
Wei Yongjun58add6c2012-09-10 12:42:31 +0800558 struct fsl_otg *otg_dev;
Li Yang0807c502011-04-18 22:01:59 +0200559
Wei Yongjun58add6c2012-09-10 12:42:31 +0800560 if (!otg)
561 return -ENODEV;
562
Antoine Tenart19c1eac2014-10-30 18:41:14 +0100563 otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy);
Wei Yongjun58add6c2012-09-10 12:42:31 +0800564 if (otg_dev != fsl_otg_dev)
Li Yang0807c502011-04-18 22:01:59 +0200565 return -ENODEV;
566
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200567 otg->host = host;
Li Yang0807c502011-04-18 22:01:59 +0200568
569 otg_dev->fsm.a_bus_drop = 0;
570 otg_dev->fsm.a_bus_req = 1;
571
572 if (host) {
573 VDBG("host off......\n");
574
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200575 otg->host->otg_port = fsl_otg_initdata.otg_port;
576 otg->host->is_b_host = otg_dev->fsm.id;
Li Yang0807c502011-04-18 22:01:59 +0200577 /*
Petr Mladek37ebb542014-09-19 17:32:23 +0200578 * must leave time for hub_wq to finish its thing
Li Yang0807c502011-04-18 22:01:59 +0200579 * before yanking the host driver out from under it,
580 * so suspend the host after a short delay.
581 */
582 otg_dev->host_working = 1;
583 schedule_delayed_work(&otg_dev->otg_event, 100);
584 return 0;
585 } else {
586 /* host driver going away */
587 if (!(fsl_readl(&otg_dev->dr_mem_map->otgsc) &
588 OTGSC_STS_USB_ID)) {
589 /* Mini-A cable connected */
590 struct otg_fsm *fsm = &otg_dev->fsm;
591
Felipe Balbie5ba1c02014-11-12 08:31:40 -0600592 otg->state = OTG_STATE_UNDEFINED;
Li Yang0807c502011-04-18 22:01:59 +0200593 fsm->protocol = PROTO_UNDEF;
594 }
595 }
596
597 otg_dev->host_working = 0;
598
599 otg_statemachine(&otg_dev->fsm);
600
601 return 0;
602}
603
604/* Called by initialization code of udc. Register udc to OTG. */
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200605static int fsl_otg_set_peripheral(struct usb_otg *otg,
606 struct usb_gadget *gadget)
Li Yang0807c502011-04-18 22:01:59 +0200607{
Wei Yongjun58add6c2012-09-10 12:42:31 +0800608 struct fsl_otg *otg_dev;
Li Yang0807c502011-04-18 22:01:59 +0200609
Wei Yongjun58add6c2012-09-10 12:42:31 +0800610 if (!otg)
611 return -ENODEV;
612
Antoine Tenart19c1eac2014-10-30 18:41:14 +0100613 otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy);
Li Yang0807c502011-04-18 22:01:59 +0200614 VDBG("otg_dev 0x%x\n", (int)otg_dev);
615 VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev);
Wei Yongjun58add6c2012-09-10 12:42:31 +0800616 if (otg_dev != fsl_otg_dev)
Li Yang0807c502011-04-18 22:01:59 +0200617 return -ENODEV;
618
619 if (!gadget) {
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200620 if (!otg->default_a)
621 otg->gadget->ops->vbus_draw(otg->gadget, 0);
622 usb_gadget_vbus_disconnect(otg->gadget);
623 otg->gadget = 0;
Li Yang0807c502011-04-18 22:01:59 +0200624 otg_dev->fsm.b_bus_req = 0;
625 otg_statemachine(&otg_dev->fsm);
626 return 0;
627 }
628
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200629 otg->gadget = gadget;
630 otg->gadget->is_a_peripheral = !otg_dev->fsm.id;
Li Yang0807c502011-04-18 22:01:59 +0200631
632 otg_dev->fsm.b_bus_req = 1;
633
634 /* start the gadget right away if the ID pin says Mini-B */
Greg Kroah-Hartman523e5312013-06-28 11:32:55 -0700635 pr_debug("ID pin=%d\n", otg_dev->fsm.id);
Li Yang0807c502011-04-18 22:01:59 +0200636 if (otg_dev->fsm.id == 1) {
637 fsl_otg_start_host(&otg_dev->fsm, 0);
638 otg_drv_vbus(&otg_dev->fsm, 0);
639 fsl_otg_start_gadget(&otg_dev->fsm, 1);
640 }
641
642 return 0;
643}
644
645/* Set OTG port power, only for B-device */
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200646static int fsl_otg_set_power(struct usb_phy *phy, unsigned mA)
Li Yang0807c502011-04-18 22:01:59 +0200647{
648 if (!fsl_otg_dev)
649 return -ENODEV;
Felipe Balbie5ba1c02014-11-12 08:31:40 -0600650 if (phy->otg->state == OTG_STATE_B_PERIPHERAL)
Li Yang0807c502011-04-18 22:01:59 +0200651 pr_info("FSL OTG: Draw %d mA\n", mA);
652
653 return 0;
654}
655
656/*
657 * Delayed pin detect interrupt processing.
658 *
659 * When the Mini-A cable is disconnected from the board,
Justin P. Mattock42b2aa82011-11-28 20:31:00 -0800660 * the pin-detect interrupt happens before the disconnect
Li Yang0807c502011-04-18 22:01:59 +0200661 * interrupts for the connected device(s). In order to
662 * process the disconnect interrupt(s) prior to switching
663 * roles, the pin-detect interrupts are delayed, and handled
664 * by this routine.
665 */
666static void fsl_otg_event(struct work_struct *work)
667{
668 struct fsl_otg *og = container_of(work, struct fsl_otg, otg_event.work);
669 struct otg_fsm *fsm = &og->fsm;
670
671 if (fsm->id) { /* switch to gadget */
672 fsl_otg_start_host(fsm, 0);
673 otg_drv_vbus(fsm, 0);
674 fsl_otg_start_gadget(fsm, 1);
675 }
676}
677
678/* B-device start SRP */
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200679static int fsl_otg_start_srp(struct usb_otg *otg)
Li Yang0807c502011-04-18 22:01:59 +0200680{
Wei Yongjun58add6c2012-09-10 12:42:31 +0800681 struct fsl_otg *otg_dev;
Li Yang0807c502011-04-18 22:01:59 +0200682
Felipe Balbie5ba1c02014-11-12 08:31:40 -0600683 if (!otg || otg->state != OTG_STATE_B_IDLE)
Wei Yongjun58add6c2012-09-10 12:42:31 +0800684 return -ENODEV;
685
Antoine Tenart19c1eac2014-10-30 18:41:14 +0100686 otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy);
Wei Yongjun58add6c2012-09-10 12:42:31 +0800687 if (otg_dev != fsl_otg_dev)
Li Yang0807c502011-04-18 22:01:59 +0200688 return -ENODEV;
689
690 otg_dev->fsm.b_bus_req = 1;
691 otg_statemachine(&otg_dev->fsm);
692
693 return 0;
694}
695
696/* A_host suspend will call this function to start hnp */
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200697static int fsl_otg_start_hnp(struct usb_otg *otg)
Li Yang0807c502011-04-18 22:01:59 +0200698{
Wei Yongjun58add6c2012-09-10 12:42:31 +0800699 struct fsl_otg *otg_dev;
Li Yang0807c502011-04-18 22:01:59 +0200700
Wei Yongjun58add6c2012-09-10 12:42:31 +0800701 if (!otg)
702 return -ENODEV;
703
Antoine Tenart19c1eac2014-10-30 18:41:14 +0100704 otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy);
Wei Yongjun58add6c2012-09-10 12:42:31 +0800705 if (otg_dev != fsl_otg_dev)
Li Yang0807c502011-04-18 22:01:59 +0200706 return -ENODEV;
707
Greg Kroah-Hartman523e5312013-06-28 11:32:55 -0700708 pr_debug("start_hnp...\n");
Li Yang0807c502011-04-18 22:01:59 +0200709
710 /* clear a_bus_req to enter a_suspend state */
711 otg_dev->fsm.a_bus_req = 0;
712 otg_statemachine(&otg_dev->fsm);
713
714 return 0;
715}
716
717/*
718 * Interrupt handler. OTG/host/peripheral share the same int line.
719 * OTG driver clears OTGSC interrupts and leaves USB interrupts
720 * intact. It needs to have knowledge of some USB interrupts
721 * such as port change.
722 */
723irqreturn_t fsl_otg_isr(int irq, void *dev_id)
724{
725 struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm;
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200726 struct usb_otg *otg = ((struct fsl_otg *)dev_id)->phy.otg;
Li Yang0807c502011-04-18 22:01:59 +0200727 u32 otg_int_src, otg_sc;
728
729 otg_sc = fsl_readl(&usb_dr_regs->otgsc);
730 otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8);
731
732 /* Only clear otg interrupts */
733 fsl_writel(otg_sc, &usb_dr_regs->otgsc);
734
735 /*FIXME: ID change not generate when init to 0 */
736 fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
737 otg->default_a = (fsm->id == 0);
738
739 /* process OTG interrupts */
740 if (otg_int_src) {
741 if (otg_int_src & OTGSC_INTSTS_USB_ID) {
742 fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
743 otg->default_a = (fsm->id == 0);
744 /* clear conn information */
745 if (fsm->id)
746 fsm->b_conn = 0;
747 else
748 fsm->a_conn = 0;
749
750 if (otg->host)
751 otg->host->is_b_host = fsm->id;
752 if (otg->gadget)
753 otg->gadget->is_a_peripheral = !fsm->id;
754 VDBG("ID int (ID is %d)\n", fsm->id);
755
756 if (fsm->id) { /* switch to gadget */
757 schedule_delayed_work(
758 &((struct fsl_otg *)dev_id)->otg_event,
759 100);
760 } else { /* switch to host */
761 cancel_delayed_work(&
762 ((struct fsl_otg *)dev_id)->
763 otg_event);
764 fsl_otg_start_gadget(fsm, 0);
765 otg_drv_vbus(fsm, 1);
766 fsl_otg_start_host(fsm, 1);
767 }
768 return IRQ_HANDLED;
769 }
770 }
771 return IRQ_NONE;
772}
773
774static struct otg_fsm_ops fsl_otg_ops = {
775 .chrg_vbus = fsl_otg_chrg_vbus,
776 .drv_vbus = fsl_otg_drv_vbus,
777 .loc_conn = fsl_otg_loc_conn,
778 .loc_sof = fsl_otg_loc_sof,
779 .start_pulse = fsl_otg_start_pulse,
780
Anton Tikhomirovf6de27e2013-10-03 12:42:04 +0900781 .add_timer = fsl_otg_fsm_add_timer,
782 .del_timer = fsl_otg_fsm_del_timer,
Li Yang0807c502011-04-18 22:01:59 +0200783
784 .start_host = fsl_otg_start_host,
785 .start_gadget = fsl_otg_start_gadget,
786};
787
788/* Initialize the global variable fsl_otg_dev and request IRQ for OTG */
789static int fsl_otg_conf(struct platform_device *pdev)
790{
791 struct fsl_otg *fsl_otg_tc;
792 int status;
793
794 if (fsl_otg_dev)
795 return 0;
796
797 /* allocate space to fsl otg device */
798 fsl_otg_tc = kzalloc(sizeof(struct fsl_otg), GFP_KERNEL);
799 if (!fsl_otg_tc)
800 return -ENOMEM;
801
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200802 fsl_otg_tc->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
803 if (!fsl_otg_tc->phy.otg) {
804 kfree(fsl_otg_tc);
805 return -ENOMEM;
806 }
807
Li Yang0807c502011-04-18 22:01:59 +0200808 INIT_DELAYED_WORK(&fsl_otg_tc->otg_event, fsl_otg_event);
809
810 INIT_LIST_HEAD(&active_timers);
811 status = fsl_otg_init_timers(&fsl_otg_tc->fsm);
812 if (status) {
813 pr_info("Couldn't init OTG timers\n");
814 goto err;
815 }
Anton Tikhomirov16e569e2013-11-26 11:46:05 +0900816 mutex_init(&fsl_otg_tc->fsm.lock);
Li Yang0807c502011-04-18 22:01:59 +0200817
818 /* Set OTG state machine operations */
819 fsl_otg_tc->fsm.ops = &fsl_otg_ops;
820
821 /* initialize the otg structure */
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200822 fsl_otg_tc->phy.label = DRIVER_DESC;
Robert Jarzmik1abd8b32013-05-10 15:15:08 +0530823 fsl_otg_tc->phy.dev = &pdev->dev;
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200824 fsl_otg_tc->phy.set_power = fsl_otg_set_power;
825
Antoine Tenart19c1eac2014-10-30 18:41:14 +0100826 fsl_otg_tc->phy.otg->usb_phy = &fsl_otg_tc->phy;
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200827 fsl_otg_tc->phy.otg->set_host = fsl_otg_set_host;
828 fsl_otg_tc->phy.otg->set_peripheral = fsl_otg_set_peripheral;
829 fsl_otg_tc->phy.otg->start_hnp = fsl_otg_start_hnp;
830 fsl_otg_tc->phy.otg->start_srp = fsl_otg_start_srp;
Li Yang0807c502011-04-18 22:01:59 +0200831
832 fsl_otg_dev = fsl_otg_tc;
833
834 /* Store the otg transceiver */
Kishon Vijay Abraham I662dca52012-06-22 17:02:46 +0530835 status = usb_add_phy(&fsl_otg_tc->phy, USB_PHY_TYPE_USB2);
Li Yang0807c502011-04-18 22:01:59 +0200836 if (status) {
837 pr_warn(FSL_OTG_NAME ": unable to register OTG transceiver.\n");
838 goto err;
839 }
840
841 return 0;
842err:
843 fsl_otg_uninit_timers();
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200844 kfree(fsl_otg_tc->phy.otg);
Li Yang0807c502011-04-18 22:01:59 +0200845 kfree(fsl_otg_tc);
846 return status;
847}
848
849/* OTG Initialization */
850int usb_otg_start(struct platform_device *pdev)
851{
852 struct fsl_otg *p_otg;
Kishon Vijay Abraham I662dca52012-06-22 17:02:46 +0530853 struct usb_phy *otg_trans = usb_get_phy(USB_PHY_TYPE_USB2);
Li Yang0807c502011-04-18 22:01:59 +0200854 struct otg_fsm *fsm;
855 int status;
856 struct resource *res;
857 u32 temp;
Jingoo Han19f9e182013-07-30 17:02:13 +0900858 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
Li Yang0807c502011-04-18 22:01:59 +0200859
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200860 p_otg = container_of(otg_trans, struct fsl_otg, phy);
Li Yang0807c502011-04-18 22:01:59 +0200861 fsm = &p_otg->fsm;
862
863 /* Initialize the state machine structure with default values */
864 SET_OTG_STATE(otg_trans, OTG_STATE_UNDEFINED);
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200865 fsm->otg = p_otg->phy.otg;
Li Yang0807c502011-04-18 22:01:59 +0200866
867 /* We don't require predefined MEM/IRQ resource index */
868 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
869 if (!res)
870 return -ENXIO;
871
872 /* We don't request_mem_region here to enable resource sharing
873 * with host/device */
874
875 usb_dr_regs = ioremap(res->start, sizeof(struct usb_dr_mmap));
876 p_otg->dr_mem_map = (struct usb_dr_mmap *)usb_dr_regs;
877 pdata->regs = (void *)usb_dr_regs;
878
879 if (pdata->init && pdata->init(pdev) != 0)
880 return -EINVAL;
881
882 if (pdata->big_endian_mmio) {
883 _fsl_readl = _fsl_readl_be;
884 _fsl_writel = _fsl_writel_be;
885 } else {
886 _fsl_readl = _fsl_readl_le;
887 _fsl_writel = _fsl_writel_le;
888 }
889
890 /* request irq */
891 p_otg->irq = platform_get_irq(pdev, 0);
892 status = request_irq(p_otg->irq, fsl_otg_isr,
893 IRQF_SHARED, driver_name, p_otg);
894 if (status) {
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200895 dev_dbg(p_otg->phy.dev, "can't get IRQ %d, error %d\n",
Li Yang0807c502011-04-18 22:01:59 +0200896 p_otg->irq, status);
897 iounmap(p_otg->dr_mem_map);
Heikki Krogerus7e062c02012-02-13 13:24:06 +0200898 kfree(p_otg->phy.otg);
Li Yang0807c502011-04-18 22:01:59 +0200899 kfree(p_otg);
900 return status;
901 }
902
903 /* stop the controller */
904 temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
905 temp &= ~USB_CMD_RUN_STOP;
906 fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
907
908 /* reset the controller */
909 temp = fsl_readl(&p_otg->dr_mem_map->usbcmd);
910 temp |= USB_CMD_CTRL_RESET;
911 fsl_writel(temp, &p_otg->dr_mem_map->usbcmd);
912
913 /* wait reset completed */
914 while (fsl_readl(&p_otg->dr_mem_map->usbcmd) & USB_CMD_CTRL_RESET)
915 ;
916
917 /* configure the VBUSHS as IDLE(both host and device) */
918 temp = USB_MODE_STREAM_DISABLE | (pdata->es ? USB_MODE_ES : 0);
919 fsl_writel(temp, &p_otg->dr_mem_map->usbmode);
920
921 /* configure PHY interface */
922 temp = fsl_readl(&p_otg->dr_mem_map->portsc);
923 temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW);
924 switch (pdata->phy_mode) {
925 case FSL_USB2_PHY_ULPI:
926 temp |= PORTSC_PTS_ULPI;
927 break;
928 case FSL_USB2_PHY_UTMI_WIDE:
929 temp |= PORTSC_PTW_16BIT;
930 /* fall through */
931 case FSL_USB2_PHY_UTMI:
932 temp |= PORTSC_PTS_UTMI;
933 /* fall through */
934 default:
935 break;
936 }
937 fsl_writel(temp, &p_otg->dr_mem_map->portsc);
938
939 if (pdata->have_sysif_regs) {
940 /* configure control enable IO output, big endian register */
941 temp = __raw_readl(&p_otg->dr_mem_map->control);
942 temp |= USB_CTRL_IOENB;
943 __raw_writel(temp, &p_otg->dr_mem_map->control);
944 }
945
946 /* disable all interrupt and clear all OTGSC status */
947 temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
948 temp &= ~OTGSC_INTERRUPT_ENABLE_BITS_MASK;
949 temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE;
950 fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
951
952 /*
953 * The identification (id) input is FALSE when a Mini-A plug is inserted
954 * in the devices Mini-AB receptacle. Otherwise, this input is TRUE.
955 * Also: record initial state of ID pin
956 */
957 if (fsl_readl(&p_otg->dr_mem_map->otgsc) & OTGSC_STS_USB_ID) {
Felipe Balbie5ba1c02014-11-12 08:31:40 -0600958 p_otg->phy.otg->state = OTG_STATE_UNDEFINED;
Li Yang0807c502011-04-18 22:01:59 +0200959 p_otg->fsm.id = 1;
960 } else {
Felipe Balbie5ba1c02014-11-12 08:31:40 -0600961 p_otg->phy.otg->state = OTG_STATE_A_IDLE;
Li Yang0807c502011-04-18 22:01:59 +0200962 p_otg->fsm.id = 0;
963 }
964
Greg Kroah-Hartman523e5312013-06-28 11:32:55 -0700965 pr_debug("initial ID pin=%d\n", p_otg->fsm.id);
Li Yang0807c502011-04-18 22:01:59 +0200966
967 /* enable OTG ID pin interrupt */
968 temp = fsl_readl(&p_otg->dr_mem_map->otgsc);
969 temp |= OTGSC_INTR_USB_ID_EN;
970 temp &= ~(OTGSC_CTRL_VBUS_DISCHARGE | OTGSC_INTR_1MS_TIMER_EN);
971 fsl_writel(temp, &p_otg->dr_mem_map->otgsc);
972
973 return 0;
974}
975
976/*
977 * state file in sysfs
978 */
979static int show_fsl_usb2_otg_state(struct device *dev,
980 struct device_attribute *attr, char *buf)
981{
982 struct otg_fsm *fsm = &fsl_otg_dev->fsm;
983 char *next = buf;
984 unsigned size = PAGE_SIZE;
Li Yang0807c502011-04-18 22:01:59 +0200985 int t;
986
Anton Tikhomirov16e569e2013-11-26 11:46:05 +0900987 mutex_lock(&fsm->lock);
Li Yang0807c502011-04-18 22:01:59 +0200988
989 /* basic driver infomation */
990 t = scnprintf(next, size,
991 DRIVER_DESC "\n" "fsl_usb2_otg version: %s\n\n",
992 DRIVER_VERSION);
993 size -= t;
994 next += t;
995
996 /* Registers */
997 t = scnprintf(next, size,
998 "OTGSC: 0x%08x\n"
999 "PORTSC: 0x%08x\n"
1000 "USBMODE: 0x%08x\n"
1001 "USBCMD: 0x%08x\n"
1002 "USBSTS: 0x%08x\n"
1003 "USBINTR: 0x%08x\n",
1004 fsl_readl(&usb_dr_regs->otgsc),
1005 fsl_readl(&usb_dr_regs->portsc),
1006 fsl_readl(&usb_dr_regs->usbmode),
1007 fsl_readl(&usb_dr_regs->usbcmd),
1008 fsl_readl(&usb_dr_regs->usbsts),
1009 fsl_readl(&usb_dr_regs->usbintr));
1010 size -= t;
1011 next += t;
1012
1013 /* State */
1014 t = scnprintf(next, size,
1015 "OTG state: %s\n\n",
Felipe Balbie5ba1c02014-11-12 08:31:40 -06001016 usb_otg_state_string(fsl_otg_dev->phy.otg->state));
Li Yang0807c502011-04-18 22:01:59 +02001017 size -= t;
1018 next += t;
1019
1020 /* State Machine Variables */
1021 t = scnprintf(next, size,
1022 "a_bus_req: %d\n"
1023 "b_bus_req: %d\n"
1024 "a_bus_resume: %d\n"
1025 "a_bus_suspend: %d\n"
1026 "a_conn: %d\n"
1027 "a_sess_vld: %d\n"
1028 "a_srp_det: %d\n"
1029 "a_vbus_vld: %d\n"
1030 "b_bus_resume: %d\n"
1031 "b_bus_suspend: %d\n"
1032 "b_conn: %d\n"
1033 "b_se0_srp: %d\n"
Anton Tikhomirov68041782013-10-03 12:42:04 +09001034 "b_ssend_srp: %d\n"
Li Yang0807c502011-04-18 22:01:59 +02001035 "b_sess_vld: %d\n"
1036 "id: %d\n",
1037 fsm->a_bus_req,
1038 fsm->b_bus_req,
1039 fsm->a_bus_resume,
1040 fsm->a_bus_suspend,
1041 fsm->a_conn,
1042 fsm->a_sess_vld,
1043 fsm->a_srp_det,
1044 fsm->a_vbus_vld,
1045 fsm->b_bus_resume,
1046 fsm->b_bus_suspend,
1047 fsm->b_conn,
1048 fsm->b_se0_srp,
Anton Tikhomirov68041782013-10-03 12:42:04 +09001049 fsm->b_ssend_srp,
Li Yang0807c502011-04-18 22:01:59 +02001050 fsm->b_sess_vld,
1051 fsm->id);
1052 size -= t;
1053 next += t;
1054
Anton Tikhomirov16e569e2013-11-26 11:46:05 +09001055 mutex_unlock(&fsm->lock);
Li Yang0807c502011-04-18 22:01:59 +02001056
1057 return PAGE_SIZE - size;
1058}
1059
1060static DEVICE_ATTR(fsl_usb2_otg_state, S_IRUGO, show_fsl_usb2_otg_state, NULL);
1061
1062
1063/* Char driver interface to control some OTG input */
1064
1065/*
1066 * Handle some ioctl command, such as get otg
1067 * status and set host suspend
1068 */
1069static long fsl_otg_ioctl(struct file *file, unsigned int cmd,
1070 unsigned long arg)
1071{
1072 u32 retval = 0;
1073
1074 switch (cmd) {
1075 case GET_OTG_STATUS:
1076 retval = fsl_otg_dev->host_working;
1077 break;
1078
1079 case SET_A_SUSPEND_REQ:
Anton Tikhomirovcff4dab2013-10-03 12:42:04 +09001080 fsl_otg_dev->fsm.a_suspend_req_inf = arg;
Li Yang0807c502011-04-18 22:01:59 +02001081 break;
1082
1083 case SET_A_BUS_DROP:
1084 fsl_otg_dev->fsm.a_bus_drop = arg;
1085 break;
1086
1087 case SET_A_BUS_REQ:
1088 fsl_otg_dev->fsm.a_bus_req = arg;
1089 break;
1090
1091 case SET_B_BUS_REQ:
1092 fsl_otg_dev->fsm.b_bus_req = arg;
1093 break;
1094
1095 default:
1096 break;
1097 }
1098
1099 otg_statemachine(&fsl_otg_dev->fsm);
1100
1101 return retval;
1102}
1103
1104static int fsl_otg_open(struct inode *inode, struct file *file)
1105{
1106 return 0;
1107}
1108
1109static int fsl_otg_release(struct inode *inode, struct file *file)
1110{
1111 return 0;
1112}
1113
1114static const struct file_operations otg_fops = {
1115 .owner = THIS_MODULE,
1116 .llseek = NULL,
1117 .read = NULL,
1118 .write = NULL,
1119 .unlocked_ioctl = fsl_otg_ioctl,
1120 .open = fsl_otg_open,
1121 .release = fsl_otg_release,
1122};
1123
Bill Pemberton41ac7b32012-11-19 13:21:48 -05001124static int fsl_otg_probe(struct platform_device *pdev)
Li Yang0807c502011-04-18 22:01:59 +02001125{
1126 int ret;
1127
Jingoo Han19f9e182013-07-30 17:02:13 +09001128 if (!dev_get_platdata(&pdev->dev))
Li Yang0807c502011-04-18 22:01:59 +02001129 return -ENODEV;
1130
1131 /* configure the OTG */
1132 ret = fsl_otg_conf(pdev);
1133 if (ret) {
1134 dev_err(&pdev->dev, "Couldn't configure OTG module\n");
1135 return ret;
1136 }
1137
1138 /* start OTG */
1139 ret = usb_otg_start(pdev);
1140 if (ret) {
1141 dev_err(&pdev->dev, "Can't init FSL OTG device\n");
1142 return ret;
1143 }
1144
1145 ret = register_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME, &otg_fops);
1146 if (ret) {
1147 dev_err(&pdev->dev, "unable to register FSL OTG device\n");
1148 return ret;
1149 }
1150
1151 ret = device_create_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
1152 if (ret)
1153 dev_warn(&pdev->dev, "Can't register sysfs attribute\n");
1154
1155 return ret;
1156}
1157
Bill Pembertonfb4e98a2012-11-19 13:26:20 -05001158static int fsl_otg_remove(struct platform_device *pdev)
Li Yang0807c502011-04-18 22:01:59 +02001159{
Jingoo Han19f9e182013-07-30 17:02:13 +09001160 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
Li Yang0807c502011-04-18 22:01:59 +02001161
Kishon Vijay Abraham I662dca52012-06-22 17:02:46 +05301162 usb_remove_phy(&fsl_otg_dev->phy);
Li Yang0807c502011-04-18 22:01:59 +02001163 free_irq(fsl_otg_dev->irq, fsl_otg_dev);
1164
1165 iounmap((void *)usb_dr_regs);
1166
1167 fsl_otg_uninit_timers();
Heikki Krogerus7e062c02012-02-13 13:24:06 +02001168 kfree(fsl_otg_dev->phy.otg);
Li Yang0807c502011-04-18 22:01:59 +02001169 kfree(fsl_otg_dev);
1170
1171 device_remove_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state);
1172
1173 unregister_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME);
1174
1175 if (pdata->exit)
1176 pdata->exit(pdev);
1177
1178 return 0;
1179}
1180
1181struct platform_driver fsl_otg_driver = {
1182 .probe = fsl_otg_probe,
Bill Pemberton76904172012-11-19 13:21:08 -05001183 .remove = fsl_otg_remove,
Li Yang0807c502011-04-18 22:01:59 +02001184 .driver = {
1185 .name = driver_name,
1186 .owner = THIS_MODULE,
1187 },
1188};
1189
Axel Lincc27c962011-11-27 20:16:27 +08001190module_platform_driver(fsl_otg_driver);
Li Yang0807c502011-04-18 22:01:59 +02001191
1192MODULE_DESCRIPTION(DRIVER_INFO);
1193MODULE_AUTHOR(DRIVER_AUTHOR);
1194MODULE_LICENSE("GPL");