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path: root/drivers/usb/otg/langwell_otg.c
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-rw-r--r--drivers/usb/otg/langwell_otg.c1915
1 files changed, 1915 insertions, 0 deletions
diff --git a/drivers/usb/otg/langwell_otg.c b/drivers/usb/otg/langwell_otg.c
new file mode 100644
index 000000000000..6f628d0e9f39
--- /dev/null
+++ b/drivers/usb/otg/langwell_otg.c
@@ -0,0 +1,1915 @@
1/*
2 * Intel Langwell USB OTG transceiver driver
3 * Copyright (C) 2008 - 2009, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 */
19/* This driver helps to switch Langwell OTG controller function between host
20 * and peripheral. It works with EHCI driver and Langwell client controller
21 * driver together.
22 */
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/pci.h>
26#include <linux/errno.h>
27#include <linux/interrupt.h>
28#include <linux/kernel.h>
29#include <linux/device.h>
30#include <linux/moduleparam.h>
31#include <linux/usb/ch9.h>
32#include <linux/usb/gadget.h>
33#include <linux/usb.h>
34#include <linux/usb/otg.h>
35#include <linux/notifier.h>
36#include <asm/ipc_defs.h>
37#include <linux/delay.h>
38#include "../core/hcd.h"
39
40#include <linux/usb/langwell_otg.h>
41
42#define DRIVER_DESC "Intel Langwell USB OTG transceiver driver"
43#define DRIVER_VERSION "3.0.0.32L.0002"
44
45MODULE_DESCRIPTION(DRIVER_DESC);
46MODULE_AUTHOR("Henry Yuan <hang.yuan@intel.com>, Hao Wu <hao.wu@intel.com>");
47MODULE_VERSION(DRIVER_VERSION);
48MODULE_LICENSE("GPL");
49
50static const char driver_name[] = "langwell_otg";
51
52static int langwell_otg_probe(struct pci_dev *pdev,
53 const struct pci_device_id *id);
54static void langwell_otg_remove(struct pci_dev *pdev);
55static int langwell_otg_suspend(struct pci_dev *pdev, pm_message_t message);
56static int langwell_otg_resume(struct pci_dev *pdev);
57
58static int langwell_otg_set_host(struct otg_transceiver *otg,
59 struct usb_bus *host);
60static int langwell_otg_set_peripheral(struct otg_transceiver *otg,
61 struct usb_gadget *gadget);
62static int langwell_otg_start_srp(struct otg_transceiver *otg);
63
64static const struct pci_device_id pci_ids[] = {{
65 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
66 .class_mask = ~0,
67 .vendor = 0x8086,
68 .device = 0x0811,
69 .subvendor = PCI_ANY_ID,
70 .subdevice = PCI_ANY_ID,
71}, { /* end: all zeroes */ }
72};
73
74static struct pci_driver otg_pci_driver = {
75 .name = (char *) driver_name,
76 .id_table = pci_ids,
77
78 .probe = langwell_otg_probe,
79 .remove = langwell_otg_remove,
80
81 .suspend = langwell_otg_suspend,
82 .resume = langwell_otg_resume,
83};
84
85static const char *state_string(enum usb_otg_state state)
86{
87 switch (state) {
88 case OTG_STATE_A_IDLE:
89 return "a_idle";
90 case OTG_STATE_A_WAIT_VRISE:
91 return "a_wait_vrise";
92 case OTG_STATE_A_WAIT_BCON:
93 return "a_wait_bcon";
94 case OTG_STATE_A_HOST:
95 return "a_host";
96 case OTG_STATE_A_SUSPEND:
97 return "a_suspend";
98 case OTG_STATE_A_PERIPHERAL:
99 return "a_peripheral";
100 case OTG_STATE_A_WAIT_VFALL:
101 return "a_wait_vfall";
102 case OTG_STATE_A_VBUS_ERR:
103 return "a_vbus_err";
104 case OTG_STATE_B_IDLE:
105 return "b_idle";
106 case OTG_STATE_B_SRP_INIT:
107 return "b_srp_init";
108 case OTG_STATE_B_PERIPHERAL:
109 return "b_peripheral";
110 case OTG_STATE_B_WAIT_ACON:
111 return "b_wait_acon";
112 case OTG_STATE_B_HOST:
113 return "b_host";
114 default:
115 return "UNDEFINED";
116 }
117}
118
119/* HSM timers */
120static inline struct langwell_otg_timer *otg_timer_initializer
121(void (*function)(unsigned long), unsigned long expires, unsigned long data)
122{
123 struct langwell_otg_timer *timer;
124 timer = kmalloc(sizeof(struct langwell_otg_timer), GFP_KERNEL);
125 timer->function = function;
126 timer->expires = expires;
127 timer->data = data;
128 return timer;
129}
130
131static struct langwell_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr,
132 *a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr, *b_srp_res_tmr,
133 *b_bus_suspend_tmr;
134
135static struct list_head active_timers;
136
137static struct langwell_otg *the_transceiver;
138
139/* host/client notify transceiver when event affects HNP state */
140void langwell_update_transceiver()
141{
142 otg_dbg("transceiver driver is notified\n");
143 queue_work(the_transceiver->qwork, &the_transceiver->work);
144}
145EXPORT_SYMBOL(langwell_update_transceiver);
146
147static int langwell_otg_set_host(struct otg_transceiver *otg,
148 struct usb_bus *host)
149{
150 otg->host = host;
151
152 return 0;
153}
154
155static int langwell_otg_set_peripheral(struct otg_transceiver *otg,
156 struct usb_gadget *gadget)
157{
158 otg->gadget = gadget;
159
160 return 0;
161}
162
163static int langwell_otg_set_power(struct otg_transceiver *otg,
164 unsigned mA)
165{
166 return 0;
167}
168
169/* A-device drives vbus, controlled through PMIC CHRGCNTL register*/
170static void langwell_otg_drv_vbus(int on)
171{
172 struct ipc_pmic_reg_data pmic_data = {0};
173 struct ipc_pmic_reg_data battery_data;
174
175 /* Check if battery is attached or not */
176 battery_data.pmic_reg_data[0].register_address = 0xd2;
177 battery_data.ioc = 0;
178 battery_data.num_entries = 1;
179 if (ipc_pmic_register_read(&battery_data)) {
180 otg_dbg("Failed to read PMIC register 0xd2.\n");
181 return;
182 }
183
184 if ((battery_data.pmic_reg_data[0].value & 0x20) == 0) {
185 otg_dbg("no battery attached\n");
186 return;
187 }
188
189 /* Workaround for battery attachment issue */
190 if (battery_data.pmic_reg_data[0].value == 0x34) {
191 otg_dbg("battery \n");
192 return;
193 }
194
195 otg_dbg("battery attached\n");
196
197 pmic_data.ioc = 0;
198 pmic_data.pmic_reg_data[0].register_address = 0xD4;
199 pmic_data.num_entries = 1;
200 if (on)
201 pmic_data.pmic_reg_data[0].value = 0x20;
202 else
203 pmic_data.pmic_reg_data[0].value = 0xc0;
204
205 if (ipc_pmic_register_write(&pmic_data, TRUE))
206 otg_dbg("Failed to write PMIC.\n");
207
208}
209
210/* charge vbus or discharge vbus through a resistor to ground */
211static void langwell_otg_chrg_vbus(int on)
212{
213
214 u32 val;
215
216 val = readl(the_transceiver->regs + CI_OTGSC);
217
218 if (on)
219 writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_VC,
220 the_transceiver->regs + CI_OTGSC);
221 else
222 writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_VD,
223 the_transceiver->regs + CI_OTGSC);
224
225}
226
227/* Start SRP */
228static int langwell_otg_start_srp(struct otg_transceiver *otg)
229{
230 u32 val;
231
232 otg_dbg("Start SRP ->\n");
233
234 val = readl(the_transceiver->regs + CI_OTGSC);
235
236 writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_HADP,
237 the_transceiver->regs + CI_OTGSC);
238
239 /* Check if the data plus is finished or not */
240 msleep(8);
241 val = readl(the_transceiver->regs + CI_OTGSC);
242 if (val & (OTGSC_HADP | OTGSC_DP))
243 otg_dbg("DataLine SRP Error\n");
244
245 /* FIXME: VBus SRP */
246
247 return 0;
248}
249
250
251/* stop SOF via bus_suspend */
252static void langwell_otg_loc_sof(int on)
253{
254 struct usb_hcd *hcd;
255 int err;
256
257 otg_dbg("loc_sof -> %d\n", on);
258
259 hcd = bus_to_hcd(the_transceiver->otg.host);
260 if (on)
261 err = hcd->driver->bus_resume(hcd);
262 else
263 err = hcd->driver->bus_suspend(hcd);
264
265 if (err)
266 otg_dbg("Failed to resume/suspend bus - %d\n", err);
267}
268
269static void langwell_otg_phy_low_power(int on)
270{
271 u32 val;
272
273 otg_dbg("phy low power mode-> %d\n", on);
274
275 val = readl(the_transceiver->regs + CI_HOSTPC1);
276 if (on)
277 writel(val | HOSTPC1_PHCD, the_transceiver->regs + CI_HOSTPC1);
278 else
279 writel(val & ~HOSTPC1_PHCD, the_transceiver->regs + CI_HOSTPC1);
280}
281
282/* Enable/Disable OTG interrupt */
283static void langwell_otg_intr(int on)
284{
285 u32 val;
286
287 otg_dbg("interrupt -> %d\n", on);
288
289 val = readl(the_transceiver->regs + CI_OTGSC);
290 if (on) {
291 val = val | (OTGSC_INTEN_MASK | OTGSC_IDPU);
292 writel(val, the_transceiver->regs + CI_OTGSC);
293 } else {
294 val = val & ~(OTGSC_INTEN_MASK | OTGSC_IDPU);
295 writel(val, the_transceiver->regs + CI_OTGSC);
296 }
297}
298
299/* set HAAR: Hardware Assist Auto-Reset */
300static void langwell_otg_HAAR(int on)
301{
302 u32 val;
303
304 otg_dbg("HAAR -> %d\n", on);
305
306 val = readl(the_transceiver->regs + CI_OTGSC);
307 if (on)
308 writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_HAAR,
309 the_transceiver->regs + CI_OTGSC);
310 else
311 writel((val & ~OTGSC_INTSTS_MASK) & ~OTGSC_HAAR,
312 the_transceiver->regs + CI_OTGSC);
313}
314
315/* set HABA: Hardware Assist B-Disconnect to A-Connect */
316static void langwell_otg_HABA(int on)
317{
318 u32 val;
319
320 otg_dbg("HABA -> %d\n", on);
321
322 val = readl(the_transceiver->regs + CI_OTGSC);
323 if (on)
324 writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_HABA,
325 the_transceiver->regs + CI_OTGSC);
326 else
327 writel((val & ~OTGSC_INTSTS_MASK) & ~OTGSC_HABA,
328 the_transceiver->regs + CI_OTGSC);
329}
330
331static int langwell_otg_check_se0_srp(int on)
332{
333 u32 val;
334
335 int delay_time = TB_SE0_SRP * 10; /* step is 100us */
336
337 otg_dbg("check_se0_srp -> \n");
338
339 do {
340 udelay(100);
341 if (!delay_time--)
342 break;
343 val = readl(the_transceiver->regs + CI_PORTSC1);
344 val &= PORTSC_LS;
345 } while (!val);
346
347 otg_dbg("check_se0_srp <- \n");
348 return val;
349}
350
351/* The timeout callback function to set time out bit */
352static void set_tmout(unsigned long indicator)
353{
354 *(int *)indicator = 1;
355}
356
357void langwell_otg_nsf_msg(unsigned long indicator)
358{
359 switch (indicator) {
360 case 2:
361 case 4:
362 case 6:
363 case 7:
364 printk(KERN_ERR "OTG:NSF-%lu - deivce not responding\n",
365 indicator);
366 break;
367 case 3:
368 printk(KERN_ERR "OTG:NSF-%lu - deivce not supported\n",
369 indicator);
370 break;
371 default:
372 printk(KERN_ERR "Do not have this kind of NSF\n");
373 break;
374 }
375}
376
377/* Initialize timers */
378static void langwell_otg_init_timers(struct otg_hsm *hsm)
379{
380 /* HSM used timers */
381 a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE,
382 (unsigned long)&hsm->a_wait_vrise_tmout);
383 a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON,
384 (unsigned long)&hsm->a_wait_bcon_tmout);
385 a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS,
386 (unsigned long)&hsm->a_aidl_bdis_tmout);
387 b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST,
388 (unsigned long)&hsm->b_ase0_brst_tmout);
389 b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP,
390 (unsigned long)&hsm->b_se0_srp);
391 b_srp_res_tmr = otg_timer_initializer(&set_tmout, TB_SRP_RES,
392 (unsigned long)&hsm->b_srp_res_tmout);
393 b_bus_suspend_tmr = otg_timer_initializer(&set_tmout, TB_BUS_SUSPEND,
394 (unsigned long)&hsm->b_bus_suspend_tmout);
395}
396
397/* Free timers */
398static void langwell_otg_free_timers(void)
399{
400 kfree(a_wait_vrise_tmr);
401 kfree(a_wait_bcon_tmr);
402 kfree(a_aidl_bdis_tmr);
403 kfree(b_ase0_brst_tmr);
404 kfree(b_se0_srp_tmr);
405 kfree(b_srp_res_tmr);
406 kfree(b_bus_suspend_tmr);
407}
408
409/* Add timer to timer list */
410static void langwell_otg_add_timer(void *gtimer)
411{
412 struct langwell_otg_timer *timer = (struct langwell_otg_timer *)gtimer;
413 struct langwell_otg_timer *tmp_timer;
414 u32 val32;
415
416 /* Check if the timer is already in the active list,
417 * if so update timer count
418 */
419 list_for_each_entry(tmp_timer, &active_timers, list)
420 if (tmp_timer == timer) {
421 timer->count = timer->expires;
422 return;
423 }
424 timer->count = timer->expires;
425
426 if (list_empty(&active_timers)) {
427 val32 = readl(the_transceiver->regs + CI_OTGSC);
428 writel(val32 | OTGSC_1MSE, the_transceiver->regs + CI_OTGSC);
429 }
430
431 list_add_tail(&timer->list, &active_timers);
432}
433
434/* Remove timer from the timer list; clear timeout status */
435static void langwell_otg_del_timer(void *gtimer)
436{
437 struct langwell_otg_timer *timer = (struct langwell_otg_timer *)gtimer;
438 struct langwell_otg_timer *tmp_timer, *del_tmp;
439 u32 val32;
440
441 list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list)
442 if (tmp_timer == timer)
443 list_del(&timer->list);
444
445 if (list_empty(&active_timers)) {
446 val32 = readl(the_transceiver->regs + CI_OTGSC);
447 writel(val32 & ~OTGSC_1MSE, the_transceiver->regs + CI_OTGSC);
448 }
449}
450
451/* Reduce timer count by 1, and find timeout conditions.*/
452static int langwell_otg_tick_timer(u32 *int_sts)
453{
454 struct langwell_otg_timer *tmp_timer, *del_tmp;
455 int expired = 0;
456
457 list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) {
458 tmp_timer->count--;
459 /* check if timer expires */
460 if (!tmp_timer->count) {
461 list_del(&tmp_timer->list);
462 tmp_timer->function(tmp_timer->data);
463 expired = 1;
464 }
465 }
466
467 if (list_empty(&active_timers)) {
468 otg_dbg("tick timer: disable 1ms int\n");
469 *int_sts = *int_sts & ~OTGSC_1MSE;
470 }
471 return expired;
472}
473
474static void reset_otg(void)
475{
476 u32 val;
477 int delay_time = 1000;
478
479 otg_dbg("reseting OTG controller ...\n");
480 val = readl(the_transceiver->regs + CI_USBCMD);
481 writel(val | USBCMD_RST, the_transceiver->regs + CI_USBCMD);
482 do {
483 udelay(100);
484 if (!delay_time--)
485 otg_dbg("reset timeout\n");
486 val = readl(the_transceiver->regs + CI_USBCMD);
487 val &= USBCMD_RST;
488 } while (val != 0);
489 otg_dbg("reset done.\n");
490}
491
492static void set_host_mode(void)
493{
494 u32 val;
495
496 reset_otg();
497 val = readl(the_transceiver->regs + CI_USBMODE);
498 val = (val & (~USBMODE_CM)) | USBMODE_HOST;
499 writel(val, the_transceiver->regs + CI_USBMODE);
500}
501
502static void set_client_mode(void)
503{
504 u32 val;
505
506 reset_otg();
507 val = readl(the_transceiver->regs + CI_USBMODE);
508 val = (val & (~USBMODE_CM)) | USBMODE_DEVICE;
509 writel(val, the_transceiver->regs + CI_USBMODE);
510}
511
512static void init_hsm(void)
513{
514 struct langwell_otg *langwell = the_transceiver;
515 u32 val32;
516
517 /* read OTGSC after reset */
518 val32 = readl(langwell->regs + CI_OTGSC);
519 otg_dbg("%s: OTGSC init value = 0x%x\n", __func__, val32);
520
521 /* set init state */
522 if (val32 & OTGSC_ID) {
523 langwell->hsm.id = 1;
524 langwell->otg.default_a = 0;
525 set_client_mode();
526 langwell->otg.state = OTG_STATE_B_IDLE;
527 langwell_otg_drv_vbus(0);
528 } else {
529 langwell->hsm.id = 0;
530 langwell->otg.default_a = 1;
531 set_host_mode();
532 langwell->otg.state = OTG_STATE_A_IDLE;
533 }
534
535 /* set session indicator */
536 if (val32 & OTGSC_BSE)
537 langwell->hsm.b_sess_end = 1;
538 if (val32 & OTGSC_BSV)
539 langwell->hsm.b_sess_vld = 1;
540 if (val32 & OTGSC_ASV)
541 langwell->hsm.a_sess_vld = 1;
542 if (val32 & OTGSC_AVV)
543 langwell->hsm.a_vbus_vld = 1;
544
545 /* defautly power the bus */
546 langwell->hsm.a_bus_req = 1;
547 langwell->hsm.a_bus_drop = 0;
548 /* defautly don't request bus as B device */
549 langwell->hsm.b_bus_req = 0;
550 /* no system error */
551 langwell->hsm.a_clr_err = 0;
552}
553
554static irqreturn_t otg_dummy_irq(int irq, void *_dev)
555{
556 void __iomem *reg_base = _dev;
557 u32 val;
558 u32 int_mask = 0;
559
560 val = readl(reg_base + CI_USBMODE);
561 if ((val & USBMODE_CM) != USBMODE_DEVICE)
562 return IRQ_NONE;
563
564 val = readl(reg_base + CI_USBSTS);
565 int_mask = val & INTR_DUMMY_MASK;
566
567 if (int_mask == 0)
568 return IRQ_NONE;
569
570 /* clear hsm.b_conn here since host driver can't detect it
571 * otg_dummy_irq called means B-disconnect happened.
572 */
573 if (the_transceiver->hsm.b_conn) {
574 the_transceiver->hsm.b_conn = 0;
575 if (spin_trylock(&the_transceiver->wq_lock)) {
576 queue_work(the_transceiver->qwork,
577 &the_transceiver->work);
578 spin_unlock(&the_transceiver->wq_lock);
579 }
580 }
581 /* Clear interrupts */
582 writel(int_mask, reg_base + CI_USBSTS);
583 return IRQ_HANDLED;
584}
585
586static irqreturn_t otg_irq(int irq, void *_dev)
587{
588 struct langwell_otg *langwell = _dev;
589 u32 int_sts, int_en;
590 u32 int_mask = 0;
591 int flag = 0;
592
593 int_sts = readl(langwell->regs + CI_OTGSC);
594 int_en = (int_sts & OTGSC_INTEN_MASK) >> 8;
595 int_mask = int_sts & int_en;
596 if (int_mask == 0)
597 return IRQ_NONE;
598
599 if (int_mask & OTGSC_IDIS) {
600 otg_dbg("%s: id change int\n", __func__);
601 langwell->hsm.id = (int_sts & OTGSC_ID) ? 1 : 0;
602 flag = 1;
603 }
604 if (int_mask & OTGSC_DPIS) {
605 otg_dbg("%s: data pulse int\n", __func__);
606 langwell->hsm.a_srp_det = (int_sts & OTGSC_DPS) ? 1 : 0;
607 flag = 1;
608 }
609 if (int_mask & OTGSC_BSEIS) {
610 otg_dbg("%s: b session end int\n", __func__);
611 langwell->hsm.b_sess_end = (int_sts & OTGSC_BSE) ? 1 : 0;
612 flag = 1;
613 }
614 if (int_mask & OTGSC_BSVIS) {
615 otg_dbg("%s: b session valid int\n", __func__);
616 langwell->hsm.b_sess_vld = (int_sts & OTGSC_BSV) ? 1 : 0;
617 flag = 1;
618 }
619 if (int_mask & OTGSC_ASVIS) {
620 otg_dbg("%s: a session valid int\n", __func__);
621 langwell->hsm.a_sess_vld = (int_sts & OTGSC_ASV) ? 1 : 0;
622 flag = 1;
623 }
624 if (int_mask & OTGSC_AVVIS) {
625 otg_dbg("%s: a vbus valid int\n", __func__);
626 langwell->hsm.a_vbus_vld = (int_sts & OTGSC_AVV) ? 1 : 0;
627 flag = 1;
628 }
629
630 if (int_mask & OTGSC_1MSS) {
631 /* need to schedule otg_work if any timer is expired */
632 if (langwell_otg_tick_timer(&int_sts))
633 flag = 1;
634 }
635
636 writel((int_sts & ~OTGSC_INTSTS_MASK) | int_mask,
637 langwell->regs + CI_OTGSC);
638 if (flag)
639 queue_work(langwell->qwork, &langwell->work);
640
641 return IRQ_HANDLED;
642}
643
644static void langwell_otg_work(struct work_struct *work)
645{
646 struct langwell_otg *langwell = container_of(work,
647 struct langwell_otg, work);
648 int retval;
649
650 otg_dbg("%s: old state = %s\n", __func__,
651 state_string(langwell->otg.state));
652
653 switch (langwell->otg.state) {
654 case OTG_STATE_UNDEFINED:
655 case OTG_STATE_B_IDLE:
656 if (!langwell->hsm.id) {
657 langwell_otg_del_timer(b_srp_res_tmr);
658 langwell->otg.default_a = 1;
659 langwell->hsm.a_srp_det = 0;
660
661 langwell_otg_chrg_vbus(0);
662 langwell_otg_drv_vbus(0);
663
664 set_host_mode();
665 langwell->otg.state = OTG_STATE_A_IDLE;
666 queue_work(langwell->qwork, &langwell->work);
667 } else if (langwell->hsm.b_srp_res_tmout) {
668 langwell->hsm.b_srp_res_tmout = 0;
669 langwell->hsm.b_bus_req = 0;
670 langwell_otg_nsf_msg(6);
671 } else if (langwell->hsm.b_sess_vld) {
672 langwell_otg_del_timer(b_srp_res_tmr);
673 langwell->hsm.b_sess_end = 0;
674 langwell->hsm.a_bus_suspend = 0;
675
676 langwell_otg_chrg_vbus(0);
677 if (langwell->client_ops) {
678 langwell->client_ops->resume(langwell->pdev);
679 langwell->otg.state = OTG_STATE_B_PERIPHERAL;
680 } else
681 otg_dbg("client driver not loaded.\n");
682
683 } else if (langwell->hsm.b_bus_req &&
684 (langwell->hsm.b_sess_end)) {
685 /* workaround for b_se0_srp detection */
686 retval = langwell_otg_check_se0_srp(0);
687 if (retval) {
688 langwell->hsm.b_bus_req = 0;
689 otg_dbg("LS is not SE0, try again later\n");
690 } else {
691 /* Start SRP */
692 langwell_otg_start_srp(&langwell->otg);
693 langwell_otg_add_timer(b_srp_res_tmr);
694 }
695 }
696 break;
697 case OTG_STATE_B_SRP_INIT:
698 if (!langwell->hsm.id) {
699 langwell->otg.default_a = 1;
700 langwell->hsm.a_srp_det = 0;
701
702 langwell_otg_drv_vbus(0);
703 langwell_otg_chrg_vbus(0);
704
705 langwell->otg.state = OTG_STATE_A_IDLE;
706 queue_work(langwell->qwork, &langwell->work);
707 } else if (langwell->hsm.b_sess_vld) {
708 langwell_otg_chrg_vbus(0);
709 if (langwell->client_ops) {
710 langwell->client_ops->resume(langwell->pdev);
711 langwell->otg.state = OTG_STATE_B_PERIPHERAL;
712 } else
713 otg_dbg("client driver not loaded.\n");
714 }
715 break;
716 case OTG_STATE_B_PERIPHERAL:
717 if (!langwell->hsm.id) {
718 langwell->otg.default_a = 1;
719 langwell->hsm.a_srp_det = 0;
720
721 langwell_otg_drv_vbus(0);
722 langwell_otg_chrg_vbus(0);
723 set_host_mode();
724
725 if (langwell->client_ops) {
726 langwell->client_ops->suspend(langwell->pdev,
727 PMSG_FREEZE);
728 } else
729 otg_dbg("client driver has been removed.\n");
730
731 langwell->otg.state = OTG_STATE_A_IDLE;
732 queue_work(langwell->qwork, &langwell->work);
733 } else if (!langwell->hsm.b_sess_vld) {
734 langwell->hsm.b_hnp_enable = 0;
735
736 if (langwell->client_ops) {
737 langwell->client_ops->suspend(langwell->pdev,
738 PMSG_FREEZE);
739 } else
740 otg_dbg("client driver has been removed.\n");
741
742 langwell->otg.state = OTG_STATE_B_IDLE;
743 } else if (langwell->hsm.b_bus_req && langwell->hsm.b_hnp_enable
744 && langwell->hsm.a_bus_suspend) {
745
746 if (langwell->client_ops) {
747 langwell->client_ops->suspend(langwell->pdev,
748 PMSG_FREEZE);
749 } else
750 otg_dbg("client driver has been removed.\n");
751
752 langwell_otg_HAAR(1);
753 langwell->hsm.a_conn = 0;
754
755 if (langwell->host_ops) {
756 langwell->host_ops->probe(langwell->pdev,
757 langwell->host_ops->id_table);
758 langwell->otg.state = OTG_STATE_B_WAIT_ACON;
759 } else
760 otg_dbg("host driver not loaded.\n");
761
762 langwell->hsm.a_bus_resume = 0;
763 langwell->hsm.b_ase0_brst_tmout = 0;
764 langwell_otg_add_timer(b_ase0_brst_tmr);
765 }
766 break;
767
768 case OTG_STATE_B_WAIT_ACON:
769 if (!langwell->hsm.id) {
770 langwell_otg_del_timer(b_ase0_brst_tmr);
771 langwell->otg.default_a = 1;
772 langwell->hsm.a_srp_det = 0;
773
774 langwell_otg_drv_vbus(0);
775 langwell_otg_chrg_vbus(0);
776 set_host_mode();
777
778 langwell_otg_HAAR(0);
779 if (langwell->host_ops)
780 langwell->host_ops->remove(langwell->pdev);
781 else
782 otg_dbg("host driver has been removed.\n");
783 langwell->otg.state = OTG_STATE_A_IDLE;
784 queue_work(langwell->qwork, &langwell->work);
785 } else if (!langwell->hsm.b_sess_vld) {
786 langwell_otg_del_timer(b_ase0_brst_tmr);
787 langwell->hsm.b_hnp_enable = 0;
788 langwell->hsm.b_bus_req = 0;
789 langwell_otg_chrg_vbus(0);
790 langwell_otg_HAAR(0);
791
792 if (langwell->host_ops)
793 langwell->host_ops->remove(langwell->pdev);
794 else
795 otg_dbg("host driver has been removed.\n");
796 langwell->otg.state = OTG_STATE_B_IDLE;
797 } else if (langwell->hsm.a_conn) {
798 langwell_otg_del_timer(b_ase0_brst_tmr);
799 langwell_otg_HAAR(0);
800 langwell->otg.state = OTG_STATE_B_HOST;
801 queue_work(langwell->qwork, &langwell->work);
802 } else if (langwell->hsm.a_bus_resume ||
803 langwell->hsm.b_ase0_brst_tmout) {
804 langwell_otg_del_timer(b_ase0_brst_tmr);
805 langwell_otg_HAAR(0);
806 langwell_otg_nsf_msg(7);
807
808 if (langwell->host_ops)
809 langwell->host_ops->remove(langwell->pdev);
810 else
811 otg_dbg("host driver has been removed.\n");
812
813 langwell->hsm.a_bus_suspend = 0;
814 langwell->hsm.b_bus_req = 0;
815
816 if (langwell->client_ops)
817 langwell->client_ops->resume(langwell->pdev);
818 else
819 otg_dbg("client driver not loaded.\n");
820
821 langwell->otg.state = OTG_STATE_B_PERIPHERAL;
822 }
823 break;
824
825 case OTG_STATE_B_HOST:
826 if (!langwell->hsm.id) {
827 langwell->otg.default_a = 1;
828 langwell->hsm.a_srp_det = 0;
829
830 langwell_otg_drv_vbus(0);
831 langwell_otg_chrg_vbus(0);
832 set_host_mode();
833 if (langwell->host_ops)
834 langwell->host_ops->remove(langwell->pdev);
835 else
836 otg_dbg("host driver has been removed.\n");
837 langwell->otg.state = OTG_STATE_A_IDLE;
838 queue_work(langwell->qwork, &langwell->work);
839 } else if (!langwell->hsm.b_sess_vld) {
840 langwell->hsm.b_hnp_enable = 0;
841 langwell->hsm.b_bus_req = 0;
842 langwell_otg_chrg_vbus(0);
843 if (langwell->host_ops)
844 langwell->host_ops->remove(langwell->pdev);
845 else
846 otg_dbg("host driver has been removed.\n");
847 langwell->otg.state = OTG_STATE_B_IDLE;
848 } else if ((!langwell->hsm.b_bus_req) ||
849 (!langwell->hsm.a_conn)) {
850 langwell->hsm.b_bus_req = 0;
851 langwell_otg_loc_sof(0);
852 if (langwell->host_ops)
853 langwell->host_ops->remove(langwell->pdev);
854 else
855 otg_dbg("host driver has been removed.\n");
856
857 langwell->hsm.a_bus_suspend = 0;
858
859 if (langwell->client_ops)
860 langwell->client_ops->resume(langwell->pdev);
861 else
862 otg_dbg("client driver not loaded.\n");
863
864 langwell->otg.state = OTG_STATE_B_PERIPHERAL;
865 }
866 break;
867
868 case OTG_STATE_A_IDLE:
869 langwell->otg.default_a = 1;
870 if (langwell->hsm.id) {
871 langwell->otg.default_a = 0;
872 langwell->hsm.b_bus_req = 0;
873 langwell_otg_drv_vbus(0);
874 langwell_otg_chrg_vbus(0);
875
876 langwell->otg.state = OTG_STATE_B_IDLE;
877 queue_work(langwell->qwork, &langwell->work);
878 } else if (langwell->hsm.a_sess_vld) {
879 langwell_otg_drv_vbus(1);
880 langwell->hsm.a_srp_det = 1;
881 langwell->hsm.a_wait_vrise_tmout = 0;
882 langwell_otg_add_timer(a_wait_vrise_tmr);
883 langwell->otg.state = OTG_STATE_A_WAIT_VRISE;
884 queue_work(langwell->qwork, &langwell->work);
885 } else if (!langwell->hsm.a_bus_drop &&
886 (langwell->hsm.a_srp_det || langwell->hsm.a_bus_req)) {
887 langwell_otg_drv_vbus(1);
888 langwell->hsm.a_wait_vrise_tmout = 0;
889 langwell_otg_add_timer(a_wait_vrise_tmr);
890 langwell->otg.state = OTG_STATE_A_WAIT_VRISE;
891 queue_work(langwell->qwork, &langwell->work);
892 }
893 break;
894 case OTG_STATE_A_WAIT_VRISE:
895 if (langwell->hsm.id) {
896 langwell_otg_del_timer(a_wait_vrise_tmr);
897 langwell->hsm.b_bus_req = 0;
898 langwell->otg.default_a = 0;
899 langwell_otg_drv_vbus(0);
900 langwell->otg.state = OTG_STATE_B_IDLE;
901 } else if (langwell->hsm.a_vbus_vld) {
902 langwell_otg_del_timer(a_wait_vrise_tmr);
903 if (langwell->host_ops)
904 langwell->host_ops->probe(langwell->pdev,
905 langwell->host_ops->id_table);
906 else
907 otg_dbg("host driver not loaded.\n");
908 langwell->hsm.b_conn = 0;
909 langwell->hsm.a_set_b_hnp_en = 0;
910 langwell->hsm.a_wait_bcon_tmout = 0;
911 langwell_otg_add_timer(a_wait_bcon_tmr);
912 langwell->otg.state = OTG_STATE_A_WAIT_BCON;
913 } else if (langwell->hsm.a_wait_vrise_tmout) {
914 if (langwell->hsm.a_vbus_vld) {
915 if (langwell->host_ops)
916 langwell->host_ops->probe(
917 langwell->pdev,
918 langwell->host_ops->id_table);
919 else
920 otg_dbg("host driver not loaded.\n");
921 langwell->hsm.b_conn = 0;
922 langwell->hsm.a_set_b_hnp_en = 0;
923 langwell->hsm.a_wait_bcon_tmout = 0;
924 langwell_otg_add_timer(a_wait_bcon_tmr);
925 langwell->otg.state = OTG_STATE_A_WAIT_BCON;
926 } else {
927 langwell_otg_drv_vbus(0);
928 langwell->otg.state = OTG_STATE_A_VBUS_ERR;
929 }
930 }
931 break;
932 case OTG_STATE_A_WAIT_BCON:
933 if (langwell->hsm.id) {
934 langwell_otg_del_timer(a_wait_bcon_tmr);
935
936 langwell->otg.default_a = 0;
937 langwell->hsm.b_bus_req = 0;
938 if (langwell->host_ops)
939 langwell->host_ops->remove(langwell->pdev);
940 else
941 otg_dbg("host driver has been removed.\n");
942 langwell_otg_drv_vbus(0);
943 langwell->otg.state = OTG_STATE_B_IDLE;
944 queue_work(langwell->qwork, &langwell->work);
945 } else if (!langwell->hsm.a_vbus_vld) {
946 langwell_otg_del_timer(a_wait_bcon_tmr);
947
948 if (langwell->host_ops)
949 langwell->host_ops->remove(langwell->pdev);
950 else
951 otg_dbg("host driver has been removed.\n");
952 langwell_otg_drv_vbus(0);
953 langwell->otg.state = OTG_STATE_A_VBUS_ERR;
954 } else if (langwell->hsm.a_bus_drop ||
955 (langwell->hsm.a_wait_bcon_tmout &&
956 !langwell->hsm.a_bus_req)) {
957 langwell_otg_del_timer(a_wait_bcon_tmr);
958
959 if (langwell->host_ops)
960 langwell->host_ops->remove(langwell->pdev);
961 else
962 otg_dbg("host driver has been removed.\n");
963 langwell_otg_drv_vbus(0);
964 langwell->otg.state = OTG_STATE_A_WAIT_VFALL;
965 } else if (langwell->hsm.b_conn) {
966 langwell_otg_del_timer(a_wait_bcon_tmr);
967
968 langwell->hsm.a_suspend_req = 0;
969 langwell->otg.state = OTG_STATE_A_HOST;
970 if (!langwell->hsm.a_bus_req &&
971 langwell->hsm.a_set_b_hnp_en) {
972 /* It is not safe enough to do a fast
973 * transistion from A_WAIT_BCON to
974 * A_SUSPEND */
975 msleep(10000);
976 if (langwell->hsm.a_bus_req)
977 break;
978
979 if (request_irq(langwell->pdev->irq,
980 otg_dummy_irq, IRQF_SHARED,
981 driver_name, langwell->regs) != 0) {
982 otg_dbg("request interrupt %d fail\n",
983 langwell->pdev->irq);
984 }
985
986 langwell_otg_HABA(1);
987 langwell->hsm.b_bus_resume = 0;
988 langwell->hsm.a_aidl_bdis_tmout = 0;
989 langwell_otg_add_timer(a_aidl_bdis_tmr);
990
991 langwell_otg_loc_sof(0);
992 langwell->otg.state = OTG_STATE_A_SUSPEND;
993 } else if (!langwell->hsm.a_bus_req &&
994 !langwell->hsm.a_set_b_hnp_en) {
995 struct pci_dev *pdev = langwell->pdev;
996 if (langwell->host_ops)
997 langwell->host_ops->remove(pdev);
998 else
999 otg_dbg("host driver removed.\n");
1000 langwell_otg_drv_vbus(0);
1001 langwell->otg.state = OTG_STATE_A_WAIT_VFALL;
1002 }
1003 }
1004 break;
1005 case OTG_STATE_A_HOST:
1006 if (langwell->hsm.id) {
1007 langwell->otg.default_a = 0;
1008 langwell->hsm.b_bus_req = 0;
1009 if (langwell->host_ops)
1010 langwell->host_ops->remove(langwell->pdev);
1011 else
1012 otg_dbg("host driver has been removed.\n");
1013 langwell_otg_drv_vbus(0);
1014 langwell->otg.state = OTG_STATE_B_IDLE;
1015 queue_work(langwell->qwork, &langwell->work);
1016 } else if (langwell->hsm.a_bus_drop ||
1017 (!langwell->hsm.a_set_b_hnp_en && !langwell->hsm.a_bus_req)) {
1018 if (langwell->host_ops)
1019 langwell->host_ops->remove(langwell->pdev);
1020 else
1021 otg_dbg("host driver has been removed.\n");
1022 langwell_otg_drv_vbus(0);
1023 langwell->otg.state = OTG_STATE_A_WAIT_VFALL;
1024 } else if (!langwell->hsm.a_vbus_vld) {
1025 if (langwell->host_ops)
1026 langwell->host_ops->remove(langwell->pdev);
1027 else
1028 otg_dbg("host driver has been removed.\n");
1029 langwell_otg_drv_vbus(0);
1030 langwell->otg.state = OTG_STATE_A_VBUS_ERR;
1031 } else if (langwell->hsm.a_set_b_hnp_en
1032 && !langwell->hsm.a_bus_req) {
1033 /* Set HABA to enable hardware assistance to signal
1034 * A-connect after receiver B-disconnect. Hardware
1035 * will then set client mode and enable URE, SLE and
1036 * PCE after the assistance. otg_dummy_irq is used to
1037 * clean these ints when client driver is not resumed.
1038 */
1039 if (request_irq(langwell->pdev->irq,
1040 otg_dummy_irq, IRQF_SHARED, driver_name,
1041 langwell->regs) != 0) {
1042 otg_dbg("request interrupt %d failed\n",
1043 langwell->pdev->irq);
1044 }
1045
1046 /* set HABA */
1047 langwell_otg_HABA(1);
1048 langwell->hsm.b_bus_resume = 0;
1049 langwell->hsm.a_aidl_bdis_tmout = 0;
1050 langwell_otg_add_timer(a_aidl_bdis_tmr);
1051 langwell_otg_loc_sof(0);
1052 langwell->otg.state = OTG_STATE_A_SUSPEND;
1053 } else if (!langwell->hsm.b_conn || !langwell->hsm.a_bus_req) {
1054 langwell->hsm.a_wait_bcon_tmout = 0;
1055 langwell->hsm.a_set_b_hnp_en = 0;
1056 langwell_otg_add_timer(a_wait_bcon_tmr);
1057 langwell->otg.state = OTG_STATE_A_WAIT_BCON;
1058 }
1059 break;
1060 case OTG_STATE_A_SUSPEND:
1061 if (langwell->hsm.id) {
1062 langwell_otg_del_timer(a_aidl_bdis_tmr);
1063 langwell_otg_HABA(0);
1064 free_irq(langwell->pdev->irq, langwell->regs);
1065 langwell->otg.default_a = 0;
1066 langwell->hsm.b_bus_req = 0;
1067 if (langwell->host_ops)
1068 langwell->host_ops->remove(langwell->pdev);
1069 else
1070 otg_dbg("host driver has been removed.\n");
1071 langwell_otg_drv_vbus(0);
1072 langwell->otg.state = OTG_STATE_B_IDLE;
1073 queue_work(langwell->qwork, &langwell->work);
1074 } else if (langwell->hsm.a_bus_req ||
1075 langwell->hsm.b_bus_resume) {
1076 langwell_otg_del_timer(a_aidl_bdis_tmr);
1077 langwell_otg_HABA(0);
1078 free_irq(langwell->pdev->irq, langwell->regs);
1079 langwell->hsm.a_suspend_req = 0;
1080 langwell_otg_loc_sof(1);
1081 langwell->otg.state = OTG_STATE_A_HOST;
1082 } else if (langwell->hsm.a_aidl_bdis_tmout ||
1083 langwell->hsm.a_bus_drop) {
1084 langwell_otg_del_timer(a_aidl_bdis_tmr);
1085 langwell_otg_HABA(0);
1086 free_irq(langwell->pdev->irq, langwell->regs);
1087 if (langwell->host_ops)
1088 langwell->host_ops->remove(langwell->pdev);
1089 else
1090 otg_dbg("host driver has been removed.\n");
1091 langwell_otg_drv_vbus(0);
1092 langwell->otg.state = OTG_STATE_A_WAIT_VFALL;
1093 } else if (!langwell->hsm.b_conn &&
1094 langwell->hsm.a_set_b_hnp_en) {
1095 langwell_otg_del_timer(a_aidl_bdis_tmr);
1096 langwell_otg_HABA(0);
1097 free_irq(langwell->pdev->irq, langwell->regs);
1098
1099 if (langwell->host_ops)
1100 langwell->host_ops->remove(langwell->pdev);
1101 else
1102 otg_dbg("host driver has been removed.\n");
1103
1104 langwell->hsm.b_bus_suspend = 0;
1105 langwell->hsm.b_bus_suspend_vld = 0;
1106 langwell->hsm.b_bus_suspend_tmout = 0;
1107
1108 /* msleep(200); */
1109 if (langwell->client_ops)
1110 langwell->client_ops->resume(langwell->pdev);
1111 else
1112 otg_dbg("client driver not loaded.\n");
1113
1114 langwell_otg_add_timer(b_bus_suspend_tmr);
1115 langwell->otg.state = OTG_STATE_A_PERIPHERAL;
1116 break;
1117 } else if (!langwell->hsm.a_vbus_vld) {
1118 langwell_otg_del_timer(a_aidl_bdis_tmr);
1119 langwell_otg_HABA(0);
1120 free_irq(langwell->pdev->irq, langwell->regs);
1121 if (langwell->host_ops)
1122 langwell->host_ops->remove(langwell->pdev);
1123 else
1124 otg_dbg("host driver has been removed.\n");
1125 langwell_otg_drv_vbus(0);
1126 langwell->otg.state = OTG_STATE_A_VBUS_ERR;
1127 }
1128 break;
1129 case OTG_STATE_A_PERIPHERAL:
1130 if (langwell->hsm.id) {
1131 langwell_otg_del_timer(b_bus_suspend_tmr);
1132 langwell->otg.default_a = 0;
1133 langwell->hsm.b_bus_req = 0;
1134 if (langwell->client_ops)
1135 langwell->client_ops->suspend(langwell->pdev,
1136 PMSG_FREEZE);
1137 else
1138 otg_dbg("client driver has been removed.\n");
1139 langwell_otg_drv_vbus(0);
1140 langwell->otg.state = OTG_STATE_B_IDLE;
1141 queue_work(langwell->qwork, &langwell->work);
1142 } else if (!langwell->hsm.a_vbus_vld) {
1143 langwell_otg_del_timer(b_bus_suspend_tmr);
1144 if (langwell->client_ops)
1145 langwell->client_ops->suspend(langwell->pdev,
1146 PMSG_FREEZE);
1147 else
1148 otg_dbg("client driver has been removed.\n");
1149 langwell_otg_drv_vbus(0);
1150 langwell->otg.state = OTG_STATE_A_VBUS_ERR;
1151 } else if (langwell->hsm.a_bus_drop) {
1152 langwell_otg_del_timer(b_bus_suspend_tmr);
1153 if (langwell->client_ops)
1154 langwell->client_ops->suspend(langwell->pdev,
1155 PMSG_FREEZE);
1156 else
1157 otg_dbg("client driver has been removed.\n");
1158 langwell_otg_drv_vbus(0);
1159 langwell->otg.state = OTG_STATE_A_WAIT_VFALL;
1160 } else if (langwell->hsm.b_bus_suspend) {
1161 langwell_otg_del_timer(b_bus_suspend_tmr);
1162 if (langwell->client_ops)
1163 langwell->client_ops->suspend(langwell->pdev,
1164 PMSG_FREEZE);
1165 else
1166 otg_dbg("client driver has been removed.\n");
1167
1168 if (langwell->host_ops)
1169 langwell->host_ops->probe(langwell->pdev,
1170 langwell->host_ops->id_table);
1171 else
1172 otg_dbg("host driver not loaded.\n");
1173 langwell->hsm.a_set_b_hnp_en = 0;
1174 langwell->hsm.a_wait_bcon_tmout = 0;
1175 langwell_otg_add_timer(a_wait_bcon_tmr);
1176 langwell->otg.state = OTG_STATE_A_WAIT_BCON;
1177 } else if (langwell->hsm.b_bus_suspend_tmout) {
1178 u32 val;
1179 val = readl(langwell->regs + CI_PORTSC1);
1180 if (!(val & PORTSC_SUSP))
1181 break;
1182 if (langwell->client_ops)
1183 langwell->client_ops->suspend(langwell->pdev,
1184 PMSG_FREEZE);
1185 else
1186 otg_dbg("client driver has been removed.\n");
1187 if (langwell->host_ops)
1188 langwell->host_ops->probe(langwell->pdev,
1189 langwell->host_ops->id_table);
1190 else
1191 otg_dbg("host driver not loaded.\n");
1192 langwell->hsm.a_set_b_hnp_en = 0;
1193 langwell->hsm.a_wait_bcon_tmout = 0;
1194 langwell_otg_add_timer(a_wait_bcon_tmr);
1195 langwell->otg.state = OTG_STATE_A_WAIT_BCON;
1196 }
1197 break;
1198 case OTG_STATE_A_VBUS_ERR:
1199 if (langwell->hsm.id) {
1200 langwell->otg.default_a = 0;
1201 langwell->hsm.a_clr_err = 0;
1202 langwell->hsm.a_srp_det = 0;
1203 langwell->otg.state = OTG_STATE_B_IDLE;
1204 queue_work(langwell->qwork, &langwell->work);
1205 } else if (langwell->hsm.a_clr_err) {
1206 langwell->hsm.a_clr_err = 0;
1207 langwell->hsm.a_srp_det = 0;
1208 reset_otg();
1209 init_hsm();
1210 if (langwell->otg.state == OTG_STATE_A_IDLE)
1211 queue_work(langwell->qwork, &langwell->work);
1212 }
1213 break;
1214 case OTG_STATE_A_WAIT_VFALL:
1215 if (langwell->hsm.id) {
1216 langwell->otg.default_a = 0;
1217 langwell->otg.state = OTG_STATE_B_IDLE;
1218 queue_work(langwell->qwork, &langwell->work);
1219 } else if (langwell->hsm.a_bus_req) {
1220 langwell_otg_drv_vbus(1);
1221 langwell->hsm.a_wait_vrise_tmout = 0;
1222 langwell_otg_add_timer(a_wait_vrise_tmr);
1223 langwell->otg.state = OTG_STATE_A_WAIT_VRISE;
1224 } else if (!langwell->hsm.a_sess_vld) {
1225 langwell->hsm.a_srp_det = 0;
1226 langwell_otg_drv_vbus(0);
1227 set_host_mode();
1228 langwell->otg.state = OTG_STATE_A_IDLE;
1229 }
1230 break;
1231 default:
1232 ;
1233 }
1234
1235 otg_dbg("%s: new state = %s\n", __func__,
1236 state_string(langwell->otg.state));
1237}
1238
1239 static ssize_t
1240show_registers(struct device *_dev, struct device_attribute *attr, char *buf)
1241{
1242 struct langwell_otg *langwell;
1243 char *next;
1244 unsigned size;
1245 unsigned t;
1246
1247 langwell = the_transceiver;
1248 next = buf;
1249 size = PAGE_SIZE;
1250
1251 t = scnprintf(next, size,
1252 "\n"
1253 "USBCMD = 0x%08x \n"
1254 "USBSTS = 0x%08x \n"
1255 "USBINTR = 0x%08x \n"
1256 "ASYNCLISTADDR = 0x%08x \n"
1257 "PORTSC1 = 0x%08x \n"
1258 "HOSTPC1 = 0x%08x \n"
1259 "OTGSC = 0x%08x \n"
1260 "USBMODE = 0x%08x \n",
1261 readl(langwell->regs + 0x30),
1262 readl(langwell->regs + 0x34),
1263 readl(langwell->regs + 0x38),
1264 readl(langwell->regs + 0x48),
1265 readl(langwell->regs + 0x74),
1266 readl(langwell->regs + 0xb4),
1267 readl(langwell->regs + 0xf4),
1268 readl(langwell->regs + 0xf8)
1269 );
1270 size -= t;
1271 next += t;
1272
1273 return PAGE_SIZE - size;
1274}
1275static DEVICE_ATTR(registers, S_IRUGO, show_registers, NULL);
1276
1277static ssize_t
1278show_hsm(struct device *_dev, struct device_attribute *attr, char *buf)
1279{
1280 struct langwell_otg *langwell;
1281 char *next;
1282 unsigned size;
1283 unsigned t;
1284
1285 langwell = the_transceiver;
1286 next = buf;
1287 size = PAGE_SIZE;
1288
1289 t = scnprintf(next, size,
1290 "\n"
1291 "current state = %s\n"
1292 "a_bus_resume = \t%d\n"
1293 "a_bus_suspend = \t%d\n"
1294 "a_conn = \t%d\n"
1295 "a_sess_vld = \t%d\n"
1296 "a_srp_det = \t%d\n"
1297 "a_vbus_vld = \t%d\n"
1298 "b_bus_resume = \t%d\n"
1299 "b_bus_suspend = \t%d\n"
1300 "b_conn = \t%d\n"
1301 "b_se0_srp = \t%d\n"
1302 "b_sess_end = \t%d\n"
1303 "b_sess_vld = \t%d\n"
1304 "id = \t%d\n"
1305 "a_set_b_hnp_en = \t%d\n"
1306 "b_srp_done = \t%d\n"
1307 "b_hnp_enable = \t%d\n"
1308 "a_wait_vrise_tmout = \t%d\n"
1309 "a_wait_bcon_tmout = \t%d\n"
1310 "a_aidl_bdis_tmout = \t%d\n"
1311 "b_ase0_brst_tmout = \t%d\n"
1312 "a_bus_drop = \t%d\n"
1313 "a_bus_req = \t%d\n"
1314 "a_clr_err = \t%d\n"
1315 "a_suspend_req = \t%d\n"
1316 "b_bus_req = \t%d\n"
1317 "b_bus_suspend_tmout = \t%d\n"
1318 "b_bus_suspend_vld = \t%d\n",
1319 state_string(langwell->otg.state),
1320 langwell->hsm.a_bus_resume,
1321 langwell->hsm.a_bus_suspend,
1322 langwell->hsm.a_conn,
1323 langwell->hsm.a_sess_vld,
1324 langwell->hsm.a_srp_det,
1325 langwell->hsm.a_vbus_vld,
1326 langwell->hsm.b_bus_resume,
1327 langwell->hsm.b_bus_suspend,
1328 langwell->hsm.b_conn,
1329 langwell->hsm.b_se0_srp,
1330 langwell->hsm.b_sess_end,
1331 langwell->hsm.b_sess_vld,
1332 langwell->hsm.id,
1333 langwell->hsm.a_set_b_hnp_en,
1334 langwell->hsm.b_srp_done,
1335 langwell->hsm.b_hnp_enable,
1336 langwell->hsm.a_wait_vrise_tmout,
1337 langwell->hsm.a_wait_bcon_tmout,
1338 langwell->hsm.a_aidl_bdis_tmout,
1339 langwell->hsm.b_ase0_brst_tmout,
1340 langwell->hsm.a_bus_drop,
1341 langwell->hsm.a_bus_req,
1342 langwell->hsm.a_clr_err,
1343 langwell->hsm.a_suspend_req,
1344 langwell->hsm.b_bus_req,
1345 langwell->hsm.b_bus_suspend_tmout,
1346 langwell->hsm.b_bus_suspend_vld
1347 );
1348 size -= t;
1349 next += t;
1350
1351 return PAGE_SIZE - size;
1352}
1353static DEVICE_ATTR(hsm, S_IRUGO, show_hsm, NULL);
1354
1355static ssize_t
1356get_a_bus_req(struct device *dev, struct device_attribute *attr, char *buf)
1357{
1358 struct langwell_otg *langwell;
1359 char *next;
1360 unsigned size;
1361 unsigned t;
1362
1363 langwell = the_transceiver;
1364 next = buf;
1365 size = PAGE_SIZE;
1366
1367 t = scnprintf(next, size, "%d", langwell->hsm.a_bus_req);
1368 size -= t;
1369 next += t;
1370
1371 return PAGE_SIZE - size;
1372}
1373
1374static ssize_t
1375set_a_bus_req(struct device *dev, struct device_attribute *attr,
1376 const char *buf, size_t count)
1377{
1378 struct langwell_otg *langwell;
1379 langwell = the_transceiver;
1380 if (!langwell->otg.default_a)
1381 return -1;
1382 if (count > 2)
1383 return -1;
1384
1385 if (buf[0] == '0') {
1386 langwell->hsm.a_bus_req = 0;
1387 otg_dbg("a_bus_req = 0\n");
1388 } else if (buf[0] == '1') {
1389 /* If a_bus_drop is TRUE, a_bus_req can't be set */
1390 if (langwell->hsm.a_bus_drop)
1391 return -1;
1392 langwell->hsm.a_bus_req = 1;
1393 otg_dbg("a_bus_req = 1\n");
1394 }
1395 if (spin_trylock(&langwell->wq_lock)) {
1396 queue_work(langwell->qwork, &langwell->work);
1397 spin_unlock(&langwell->wq_lock);
1398 }
1399 return count;
1400}
1401static DEVICE_ATTR(a_bus_req, S_IRUGO | S_IWUGO, get_a_bus_req, set_a_bus_req);
1402
1403static ssize_t
1404get_a_bus_drop(struct device *dev, struct device_attribute *attr, char *buf)
1405{
1406 struct langwell_otg *langwell;
1407 char *next;
1408 unsigned size;
1409 unsigned t;
1410
1411 langwell = the_transceiver;
1412 next = buf;
1413 size = PAGE_SIZE;
1414
1415 t = scnprintf(next, size, "%d", langwell->hsm.a_bus_drop);
1416 size -= t;
1417 next += t;
1418
1419 return PAGE_SIZE - size;
1420}
1421
1422static ssize_t
1423set_a_bus_drop(struct device *dev, struct device_attribute *attr,
1424 const char *buf, size_t count)
1425{
1426 struct langwell_otg *langwell;
1427 langwell = the_transceiver;
1428 if (!langwell->otg.default_a)
1429 return -1;
1430 if (count > 2)
1431 return -1;
1432
1433 if (buf[0] == '0') {
1434 langwell->hsm.a_bus_drop = 0;
1435 otg_dbg("a_bus_drop = 0\n");
1436 } else if (buf[0] == '1') {
1437 langwell->hsm.a_bus_drop = 1;
1438 langwell->hsm.a_bus_req = 0;
1439 otg_dbg("a_bus_drop = 1, then a_bus_req = 0\n");
1440 }
1441 if (spin_trylock(&langwell->wq_lock)) {
1442 queue_work(langwell->qwork, &langwell->work);
1443 spin_unlock(&langwell->wq_lock);
1444 }
1445 return count;
1446}
1447static DEVICE_ATTR(a_bus_drop, S_IRUGO | S_IWUGO,
1448 get_a_bus_drop, set_a_bus_drop);
1449
1450static ssize_t
1451get_b_bus_req(struct device *dev, struct device_attribute *attr, char *buf)
1452{
1453 struct langwell_otg *langwell;
1454 char *next;
1455 unsigned size;
1456 unsigned t;
1457
1458 langwell = the_transceiver;
1459 next = buf;
1460 size = PAGE_SIZE;
1461
1462 t = scnprintf(next, size, "%d", langwell->hsm.b_bus_req);
1463 size -= t;
1464 next += t;
1465
1466 return PAGE_SIZE - size;
1467}
1468
1469static ssize_t
1470set_b_bus_req(struct device *dev, struct device_attribute *attr,
1471 const char *buf, size_t count)
1472{
1473 struct langwell_otg *langwell;
1474 langwell = the_transceiver;
1475
1476 if (langwell->otg.default_a)
1477 return -1;
1478
1479 if (count > 2)
1480 return -1;
1481
1482 if (buf[0] == '0') {
1483 langwell->hsm.b_bus_req = 0;
1484 otg_dbg("b_bus_req = 0\n");
1485 } else if (buf[0] == '1') {
1486 langwell->hsm.b_bus_req = 1;
1487 otg_dbg("b_bus_req = 1\n");
1488 }
1489 if (spin_trylock(&langwell->wq_lock)) {
1490 queue_work(langwell->qwork, &langwell->work);
1491 spin_unlock(&langwell->wq_lock);
1492 }
1493 return count;
1494}
1495static DEVICE_ATTR(b_bus_req, S_IRUGO | S_IWUGO, get_b_bus_req, set_b_bus_req);
1496
1497static ssize_t
1498set_a_clr_err(struct device *dev, struct device_attribute *attr,
1499 const char *buf, size_t count)
1500{
1501 struct langwell_otg *langwell;
1502 langwell = the_transceiver;
1503
1504 if (!langwell->otg.default_a)
1505 return -1;
1506 if (count > 2)
1507 return -1;
1508
1509 if (buf[0] == '1') {
1510 langwell->hsm.a_clr_err = 1;
1511 otg_dbg("a_clr_err = 1\n");
1512 }
1513 if (spin_trylock(&langwell->wq_lock)) {
1514 queue_work(langwell->qwork, &langwell->work);
1515 spin_unlock(&langwell->wq_lock);
1516 }
1517 return count;
1518}
1519static DEVICE_ATTR(a_clr_err, S_IWUGO, NULL, set_a_clr_err);
1520
1521static struct attribute *inputs_attrs[] = {
1522 &dev_attr_a_bus_req.attr,
1523 &dev_attr_a_bus_drop.attr,
1524 &dev_attr_b_bus_req.attr,
1525 &dev_attr_a_clr_err.attr,
1526 NULL,
1527};
1528
1529static struct attribute_group debug_dev_attr_group = {
1530 .name = "inputs",
1531 .attrs = inputs_attrs,
1532};
1533
1534int langwell_register_host(struct pci_driver *host_driver)
1535{
1536 int ret = 0;
1537
1538 the_transceiver->host_ops = host_driver;
1539 queue_work(the_transceiver->qwork, &the_transceiver->work);
1540 otg_dbg("host controller driver is registered\n");
1541
1542 return ret;
1543}
1544EXPORT_SYMBOL(langwell_register_host);
1545
1546void langwell_unregister_host(struct pci_driver *host_driver)
1547{
1548 if (the_transceiver->host_ops)
1549 the_transceiver->host_ops->remove(the_transceiver->pdev);
1550 the_transceiver->host_ops = NULL;
1551 the_transceiver->hsm.a_bus_drop = 1;
1552 queue_work(the_transceiver->qwork, &the_transceiver->work);
1553 otg_dbg("host controller driver is unregistered\n");
1554}
1555EXPORT_SYMBOL(langwell_unregister_host);
1556
1557int langwell_register_peripheral(struct pci_driver *client_driver)
1558{
1559 int ret = 0;
1560
1561 if (client_driver)
1562 ret = client_driver->probe(the_transceiver->pdev,
1563 client_driver->id_table);
1564 if (!ret) {
1565 the_transceiver->client_ops = client_driver;
1566 queue_work(the_transceiver->qwork, &the_transceiver->work);
1567 otg_dbg("client controller driver is registered\n");
1568 }
1569
1570 return ret;
1571}
1572EXPORT_SYMBOL(langwell_register_peripheral);
1573
1574void langwell_unregister_peripheral(struct pci_driver *client_driver)
1575{
1576 if (the_transceiver->client_ops)
1577 the_transceiver->client_ops->remove(the_transceiver->pdev);
1578 the_transceiver->client_ops = NULL;
1579 the_transceiver->hsm.b_bus_req = 0;
1580 queue_work(the_transceiver->qwork, &the_transceiver->work);
1581 otg_dbg("client controller driver is unregistered\n");
1582}
1583EXPORT_SYMBOL(langwell_unregister_peripheral);
1584
1585static int langwell_otg_probe(struct pci_dev *pdev,
1586 const struct pci_device_id *id)
1587{
1588 unsigned long resource, len;
1589 void __iomem *base = NULL;
1590 int retval;
1591 u32 val32;
1592 struct langwell_otg *langwell;
1593 char qname[] = "langwell_otg_queue";
1594
1595 retval = 0;
1596 otg_dbg("\notg controller is detected.\n");
1597 if (pci_enable_device(pdev) < 0) {
1598 retval = -ENODEV;
1599 goto done;
1600 }
1601
1602 langwell = kzalloc(sizeof *langwell, GFP_KERNEL);
1603 if (langwell == NULL) {
1604 retval = -ENOMEM;
1605 goto done;
1606 }
1607 the_transceiver = langwell;
1608
1609 /* control register: BAR 0 */
1610 resource = pci_resource_start(pdev, 0);
1611 len = pci_resource_len(pdev, 0);
1612 if (!request_mem_region(resource, len, driver_name)) {
1613 retval = -EBUSY;
1614 goto err;
1615 }
1616 langwell->region = 1;
1617
1618 base = ioremap_nocache(resource, len);
1619 if (base == NULL) {
1620 retval = -EFAULT;
1621 goto err;
1622 }
1623 langwell->regs = base;
1624
1625 if (!pdev->irq) {
1626 otg_dbg("No IRQ.\n");
1627 retval = -ENODEV;
1628 goto err;
1629 }
1630
1631 langwell->qwork = create_workqueue(qname);
1632 if (!langwell->qwork) {
1633 otg_dbg("cannot create workqueue %s\n", qname);
1634 retval = -ENOMEM;
1635 goto err;
1636 }
1637 INIT_WORK(&langwell->work, langwell_otg_work);
1638
1639 /* OTG common part */
1640 langwell->pdev = pdev;
1641 langwell->otg.dev = &pdev->dev;
1642 langwell->otg.label = driver_name;
1643 langwell->otg.set_host = langwell_otg_set_host;
1644 langwell->otg.set_peripheral = langwell_otg_set_peripheral;
1645 langwell->otg.set_power = langwell_otg_set_power;
1646 langwell->otg.start_srp = langwell_otg_start_srp;
1647 langwell->otg.state = OTG_STATE_UNDEFINED;
1648 if (otg_set_transceiver(&langwell->otg)) {
1649 otg_dbg("can't set transceiver\n");
1650 retval = -EBUSY;
1651 goto err;
1652 }
1653
1654 reset_otg();
1655 init_hsm();
1656
1657 spin_lock_init(&langwell->lock);
1658 spin_lock_init(&langwell->wq_lock);
1659 INIT_LIST_HEAD(&active_timers);
1660 langwell_otg_init_timers(&langwell->hsm);
1661
1662 if (request_irq(pdev->irq, otg_irq, IRQF_SHARED,
1663 driver_name, langwell) != 0) {
1664 otg_dbg("request interrupt %d failed\n", pdev->irq);
1665 retval = -EBUSY;
1666 goto err;
1667 }
1668
1669 /* enable OTGSC int */
1670 val32 = OTGSC_DPIE | OTGSC_BSEIE | OTGSC_BSVIE |
1671 OTGSC_ASVIE | OTGSC_AVVIE | OTGSC_IDIE | OTGSC_IDPU;
1672 writel(val32, langwell->regs + CI_OTGSC);
1673
1674 retval = device_create_file(&pdev->dev, &dev_attr_registers);
1675 if (retval < 0) {
1676 otg_dbg("Can't register sysfs attribute: %d\n", retval);
1677 goto err;
1678 }
1679
1680 retval = device_create_file(&pdev->dev, &dev_attr_hsm);
1681 if (retval < 0) {
1682 otg_dbg("Can't hsm sysfs attribute: %d\n", retval);
1683 goto err;
1684 }
1685
1686 retval = sysfs_create_group(&pdev->dev.kobj, &debug_dev_attr_group);
1687 if (retval < 0) {
1688 otg_dbg("Can't register sysfs attr group: %d\n", retval);
1689 goto err;
1690 }
1691
1692 if (langwell->otg.state == OTG_STATE_A_IDLE)
1693 queue_work(langwell->qwork, &langwell->work);
1694
1695 return 0;
1696
1697err:
1698 if (the_transceiver)
1699 langwell_otg_remove(pdev);
1700done:
1701 return retval;
1702}
1703
1704static void langwell_otg_remove(struct pci_dev *pdev)
1705{
1706 struct langwell_otg *langwell;
1707
1708 langwell = the_transceiver;
1709
1710 if (langwell->qwork) {
1711 flush_workqueue(langwell->qwork);
1712 destroy_workqueue(langwell->qwork);
1713 }
1714 langwell_otg_free_timers();
1715
1716 /* disable OTGSC interrupt as OTGSC doesn't change in reset */
1717 writel(0, langwell->regs + CI_OTGSC);
1718
1719 if (pdev->irq)
1720 free_irq(pdev->irq, langwell);
1721 if (langwell->regs)
1722 iounmap(langwell->regs);
1723 if (langwell->region)
1724 release_mem_region(pci_resource_start(pdev, 0),
1725 pci_resource_len(pdev, 0));
1726
1727 otg_set_transceiver(NULL);
1728 pci_disable_device(pdev);
1729 sysfs_remove_group(&pdev->dev.kobj, &debug_dev_attr_group);
1730 device_remove_file(&pdev->dev, &dev_attr_hsm);
1731 device_remove_file(&pdev->dev, &dev_attr_registers);
1732 kfree(langwell);
1733 langwell = NULL;
1734}
1735
1736static void transceiver_suspend(struct pci_dev *pdev)
1737{
1738 pci_save_state(pdev);
1739 pci_set_power_state(pdev, PCI_D3hot);
1740 langwell_otg_phy_low_power(1);
1741}
1742
1743static int langwell_otg_suspend(struct pci_dev *pdev, pm_message_t message)
1744{
1745 int ret = 0;
1746 struct langwell_otg *langwell;
1747
1748 langwell = the_transceiver;
1749
1750 /* Disbale OTG interrupts */
1751 langwell_otg_intr(0);
1752
1753 if (pdev->irq)
1754 free_irq(pdev->irq, langwell);
1755
1756 /* Prevent more otg_work */
1757 flush_workqueue(langwell->qwork);
1758 spin_lock(&langwell->wq_lock);
1759
1760 /* start actions */
1761 switch (langwell->otg.state) {
1762 case OTG_STATE_A_IDLE:
1763 case OTG_STATE_B_IDLE:
1764 case OTG_STATE_A_WAIT_VFALL:
1765 case OTG_STATE_A_VBUS_ERR:
1766 transceiver_suspend(pdev);
1767 break;
1768 case OTG_STATE_A_WAIT_VRISE:
1769 langwell_otg_del_timer(a_wait_vrise_tmr);
1770 langwell->hsm.a_srp_det = 0;
1771 langwell_otg_drv_vbus(0);
1772 langwell->otg.state = OTG_STATE_A_IDLE;
1773 transceiver_suspend(pdev);
1774 break;
1775 case OTG_STATE_A_WAIT_BCON:
1776 langwell_otg_del_timer(a_wait_bcon_tmr);
1777 if (langwell->host_ops)
1778 ret = langwell->host_ops->suspend(pdev, message);
1779 langwell_otg_drv_vbus(0);
1780 break;
1781 case OTG_STATE_A_HOST:
1782 if (langwell->host_ops)
1783 ret = langwell->host_ops->suspend(pdev, message);
1784 langwell_otg_drv_vbus(0);
1785 langwell_otg_phy_low_power(1);
1786 break;
1787 case OTG_STATE_A_SUSPEND:
1788 langwell_otg_del_timer(a_aidl_bdis_tmr);
1789 langwell_otg_HABA(0);
1790 if (langwell->host_ops)
1791 langwell->host_ops->remove(pdev);
1792 else
1793 otg_dbg("host driver has been removed.\n");
1794 langwell_otg_drv_vbus(0);
1795 transceiver_suspend(pdev);
1796 langwell->otg.state = OTG_STATE_A_WAIT_VFALL;
1797 break;
1798 case OTG_STATE_A_PERIPHERAL:
1799 if (langwell->client_ops)
1800 ret = langwell->client_ops->suspend(pdev, message);
1801 else
1802 otg_dbg("client driver has been removed.\n");
1803 langwell_otg_drv_vbus(0);
1804 transceiver_suspend(pdev);
1805 langwell->otg.state = OTG_STATE_A_WAIT_VFALL;
1806 break;
1807 case OTG_STATE_B_HOST:
1808 if (langwell->host_ops)
1809 langwell->host_ops->remove(pdev);
1810 else
1811 otg_dbg("host driver has been removed.\n");
1812 langwell->hsm.b_bus_req = 0;
1813 transceiver_suspend(pdev);
1814 langwell->otg.state = OTG_STATE_B_IDLE;
1815 break;
1816 case OTG_STATE_B_PERIPHERAL:
1817 if (langwell->client_ops)
1818 ret = langwell->client_ops->suspend(pdev, message);
1819 else
1820 otg_dbg("client driver has been removed.\n");
1821 break;
1822 case OTG_STATE_B_WAIT_ACON:
1823 langwell_otg_del_timer(b_ase0_brst_tmr);
1824 langwell_otg_HAAR(0);
1825 if (langwell->host_ops)
1826 langwell->host_ops->remove(pdev);
1827 else
1828 otg_dbg("host driver has been removed.\n");
1829 langwell->hsm.b_bus_req = 0;
1830 langwell->otg.state = OTG_STATE_B_IDLE;
1831 transceiver_suspend(pdev);
1832 break;
1833 default:
1834 otg_dbg("error state before suspend\n ");
1835 break;
1836 }
1837 spin_unlock(&langwell->wq_lock);
1838
1839 return ret;
1840}
1841
1842static void transceiver_resume(struct pci_dev *pdev)
1843{
1844 pci_restore_state(pdev);
1845 pci_set_power_state(pdev, PCI_D0);
1846 langwell_otg_phy_low_power(0);
1847}
1848
1849static int langwell_otg_resume(struct pci_dev *pdev)
1850{
1851 int ret = 0;
1852 struct langwell_otg *langwell;
1853
1854 langwell = the_transceiver;
1855
1856 spin_lock(&langwell->wq_lock);
1857
1858 switch (langwell->otg.state) {
1859 case OTG_STATE_A_IDLE:
1860 case OTG_STATE_B_IDLE:
1861 case OTG_STATE_A_WAIT_VFALL:
1862 case OTG_STATE_A_VBUS_ERR:
1863 transceiver_resume(pdev);
1864 break;
1865 case OTG_STATE_A_WAIT_BCON:
1866 langwell_otg_add_timer(a_wait_bcon_tmr);
1867 langwell_otg_drv_vbus(1);
1868 if (langwell->host_ops)
1869 ret = langwell->host_ops->resume(pdev);
1870 break;
1871 case OTG_STATE_A_HOST:
1872 langwell_otg_drv_vbus(1);
1873 langwell_otg_phy_low_power(0);
1874 if (langwell->host_ops)
1875 ret = langwell->host_ops->resume(pdev);
1876 break;
1877 case OTG_STATE_B_PERIPHERAL:
1878 if (langwell->client_ops)
1879 ret = langwell->client_ops->resume(pdev);
1880 else
1881 otg_dbg("client driver not loaded.\n");
1882 break;
1883 default:
1884 otg_dbg("error state before suspend\n ");
1885 break;
1886 }
1887
1888 if (request_irq(pdev->irq, otg_irq, IRQF_SHARED,
1889 driver_name, the_transceiver) != 0) {
1890 otg_dbg("request interrupt %d failed\n", pdev->irq);
1891 ret = -EBUSY;
1892 }
1893
1894 /* enable OTG interrupts */
1895 langwell_otg_intr(1);
1896
1897 spin_unlock(&langwell->wq_lock);
1898
1899 queue_work(langwell->qwork, &langwell->work);
1900
1901
1902 return ret;
1903}
1904
1905static int __init langwell_otg_init(void)
1906{
1907 return pci_register_driver(&otg_pci_driver);
1908}
1909module_init(langwell_otg_init);
1910
1911static void __exit langwell_otg_cleanup(void)
1912{
1913 pci_unregister_driver(&otg_pci_driver);
1914}
1915module_exit(langwell_otg_cleanup);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 06:33:44 -0500