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1da177e4 LT |
1 | /* |
2 | * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller | |
3 | * | |
4 | * Copyright (C) 2004 Texas Instruments | |
5 | * Copyright (C) 2004 David Brownell | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | #undef DEBUG | |
22 | #undef VERBOSE | |
23 | ||
1da177e4 LT |
24 | #include <linux/kernel.h> |
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/interrupt.h> | |
d052d1be | 29 | #include <linux/platform_device.h> |
1da177e4 LT |
30 | #include <linux/usb_ch9.h> |
31 | #include <linux/usb_gadget.h> | |
32 | #include <linux/usb.h> | |
3a16f7b4 | 33 | #include <linux/usb/otg.h> |
1da177e4 LT |
34 | #include <linux/i2c.h> |
35 | #include <linux/workqueue.h> | |
36 | ||
37 | #include <asm/irq.h> | |
38 | #include <asm/arch/usb.h> | |
39 | ||
40 | ||
41 | #ifndef DEBUG | |
42 | #undef VERBOSE | |
43 | #endif | |
44 | ||
45 | ||
46 | #define DRIVER_VERSION "24 August 2004" | |
47 | #define DRIVER_NAME (isp1301_driver.name) | |
48 | ||
49 | MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
52 | struct isp1301 { | |
53 | struct otg_transceiver otg; | |
54 | struct i2c_client client; | |
55 | void (*i2c_release)(struct device *dev); | |
56 | ||
57 | int irq; | |
58 | ||
59 | u32 last_otg_ctrl; | |
60 | unsigned working:1; | |
61 | ||
62 | struct timer_list timer; | |
63 | ||
64 | /* use keventd context to change the state for us */ | |
65 | struct work_struct work; | |
66 | ||
67 | unsigned long todo; | |
68 | # define WORK_UPDATE_ISP 0 /* update ISP from OTG */ | |
69 | # define WORK_UPDATE_OTG 1 /* update OTG from ISP */ | |
70 | # define WORK_HOST_RESUME 4 /* resume host */ | |
71 | # define WORK_TIMER 6 /* timer fired */ | |
72 | # define WORK_STOP 7 /* don't resubmit */ | |
73 | }; | |
74 | ||
75 | ||
76 | /* bits in OTG_CTRL_REG */ | |
77 | ||
78 | #define OTG_XCEIV_OUTPUTS \ | |
79 | (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) | |
80 | #define OTG_XCEIV_INPUTS \ | |
81 | (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) | |
82 | #define OTG_CTRL_BITS \ | |
83 | (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) | |
84 | /* and OTG_PULLUP is sometimes written */ | |
85 | ||
86 | #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ | |
87 | OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ | |
88 | OTG_CTRL_BITS) | |
89 | ||
90 | ||
91 | /*-------------------------------------------------------------------------*/ | |
92 | ||
93 | #ifdef CONFIG_MACH_OMAP_H2 | |
94 | ||
95 | /* board-specific PM hooks */ | |
96 | ||
97 | #include <asm/arch/gpio.h> | |
98 | #include <asm/arch/mux.h> | |
99 | #include <asm/mach-types.h> | |
100 | ||
101 | ||
102 | #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE) | |
103 | ||
104 | #include <asm/arch/tps65010.h> | |
105 | ||
106 | #else | |
107 | ||
108 | static inline int tps65010_set_vbus_draw(unsigned mA) | |
109 | { | |
110 | pr_debug("tps65010: draw %d mA (STUB)\n", mA); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | #endif | |
115 | ||
116 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
117 | { | |
118 | int status = tps65010_set_vbus_draw(mA); | |
119 | if (status < 0) | |
120 | pr_debug(" VBUS %d mA error %d\n", mA, status); | |
121 | } | |
122 | ||
123 | static void enable_vbus_source(struct isp1301 *isp) | |
124 | { | |
125 | /* this board won't supply more than 8mA vbus power. | |
126 | * some boards can switch a 100ma "unit load" (or more). | |
127 | */ | |
128 | } | |
129 | ||
130 | ||
131 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
132 | static inline void notresponding(struct isp1301 *isp) | |
133 | { | |
134 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
135 | } | |
136 | ||
137 | ||
138 | #endif | |
139 | ||
140 | /*-------------------------------------------------------------------------*/ | |
141 | ||
142 | /* only two addresses possible */ | |
143 | #define ISP_BASE 0x2c | |
144 | static unsigned short normal_i2c[] = { | |
145 | ISP_BASE, ISP_BASE + 1, | |
146 | I2C_CLIENT_END }; | |
1da177e4 LT |
147 | |
148 | I2C_CLIENT_INSMOD; | |
149 | ||
150 | static struct i2c_driver isp1301_driver; | |
151 | ||
152 | /* smbus apis are used for portability */ | |
153 | ||
154 | static inline u8 | |
155 | isp1301_get_u8(struct isp1301 *isp, u8 reg) | |
156 | { | |
157 | return i2c_smbus_read_byte_data(&isp->client, reg + 0); | |
158 | } | |
159 | ||
160 | static inline int | |
161 | isp1301_get_u16(struct isp1301 *isp, u8 reg) | |
162 | { | |
163 | return i2c_smbus_read_word_data(&isp->client, reg); | |
164 | } | |
165 | ||
166 | static inline int | |
167 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
168 | { | |
169 | return i2c_smbus_write_byte_data(&isp->client, reg + 0, bits); | |
170 | } | |
171 | ||
172 | static inline int | |
173 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
174 | { | |
175 | return i2c_smbus_write_byte_data(&isp->client, reg + 1, bits); | |
176 | } | |
177 | ||
178 | /*-------------------------------------------------------------------------*/ | |
179 | ||
180 | /* identification */ | |
181 | #define ISP1301_VENDOR_ID 0x00 /* u16 read */ | |
182 | #define ISP1301_PRODUCT_ID 0x02 /* u16 read */ | |
183 | #define ISP1301_BCD_DEVICE 0x14 /* u16 read */ | |
184 | ||
185 | #define I2C_VENDOR_ID_PHILIPS 0x04cc | |
186 | #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 | |
187 | ||
188 | /* operational registers */ | |
189 | #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ | |
190 | # define MC1_SPEED_REG (1 << 0) | |
191 | # define MC1_SUSPEND_REG (1 << 1) | |
192 | # define MC1_DAT_SE0 (1 << 2) | |
193 | # define MC1_TRANSPARENT (1 << 3) | |
194 | # define MC1_BDIS_ACON_EN (1 << 4) | |
195 | # define MC1_OE_INT_EN (1 << 5) | |
196 | # define MC1_UART_EN (1 << 6) | |
197 | # define MC1_MASK 0x7f | |
198 | #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ | |
199 | # define MC2_GLOBAL_PWR_DN (1 << 0) | |
200 | # define MC2_SPD_SUSP_CTRL (1 << 1) | |
201 | # define MC2_BI_DI (1 << 2) | |
202 | # define MC2_TRANSP_BDIR0 (1 << 3) | |
203 | # define MC2_TRANSP_BDIR1 (1 << 4) | |
204 | # define MC2_AUDIO_EN (1 << 5) | |
205 | # define MC2_PSW_EN (1 << 6) | |
206 | # define MC2_EN2V7 (1 << 7) | |
207 | #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ | |
208 | # define OTG1_DP_PULLUP (1 << 0) | |
209 | # define OTG1_DM_PULLUP (1 << 1) | |
210 | # define OTG1_DP_PULLDOWN (1 << 2) | |
211 | # define OTG1_DM_PULLDOWN (1 << 3) | |
212 | # define OTG1_ID_PULLDOWN (1 << 4) | |
213 | # define OTG1_VBUS_DRV (1 << 5) | |
214 | # define OTG1_VBUS_DISCHRG (1 << 6) | |
215 | # define OTG1_VBUS_CHRG (1 << 7) | |
216 | #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ | |
217 | # define OTG_B_SESS_END (1 << 6) | |
218 | # define OTG_B_SESS_VLD (1 << 7) | |
219 | ||
220 | #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ | |
221 | #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ | |
222 | ||
223 | #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ | |
224 | #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ | |
225 | ||
226 | /* same bitfields in all interrupt registers */ | |
227 | # define INTR_VBUS_VLD (1 << 0) | |
228 | # define INTR_SESS_VLD (1 << 1) | |
229 | # define INTR_DP_HI (1 << 2) | |
230 | # define INTR_ID_GND (1 << 3) | |
231 | # define INTR_DM_HI (1 << 4) | |
232 | # define INTR_ID_FLOAT (1 << 5) | |
233 | # define INTR_BDIS_ACON (1 << 6) | |
234 | # define INTR_CR_INT (1 << 7) | |
235 | ||
236 | /*-------------------------------------------------------------------------*/ | |
237 | ||
238 | static const char *state_string(enum usb_otg_state state) | |
239 | { | |
240 | switch (state) { | |
241 | case OTG_STATE_A_IDLE: return "a_idle"; | |
242 | case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; | |
243 | case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; | |
244 | case OTG_STATE_A_HOST: return "a_host"; | |
245 | case OTG_STATE_A_SUSPEND: return "a_suspend"; | |
246 | case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; | |
247 | case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; | |
248 | case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; | |
249 | case OTG_STATE_B_IDLE: return "b_idle"; | |
250 | case OTG_STATE_B_SRP_INIT: return "b_srp_init"; | |
251 | case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; | |
252 | case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; | |
253 | case OTG_STATE_B_HOST: return "b_host"; | |
254 | default: return "UNDEFINED"; | |
255 | } | |
256 | } | |
257 | ||
258 | static inline const char *state_name(struct isp1301 *isp) | |
259 | { | |
260 | return state_string(isp->otg.state); | |
261 | } | |
262 | ||
263 | #ifdef VERBOSE | |
264 | #define dev_vdbg dev_dbg | |
265 | #else | |
266 | #define dev_vdbg(dev, fmt, arg...) do{}while(0) | |
267 | #endif | |
268 | ||
269 | /*-------------------------------------------------------------------------*/ | |
270 | ||
271 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; | |
272 | * not everything is guarded by board-specific checks, or even using | |
273 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. | |
274 | * | |
275 | * ALSO: this currently doesn't use ISP1301 low-power modes | |
276 | * while OTG is running. | |
277 | */ | |
278 | ||
279 | static void power_down(struct isp1301 *isp) | |
280 | { | |
281 | isp->otg.state = OTG_STATE_UNDEFINED; | |
282 | ||
283 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
284 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG); | |
285 | ||
286 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); | |
287 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
288 | } | |
289 | ||
290 | static void power_up(struct isp1301 *isp) | |
291 | { | |
292 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
293 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG); | |
294 | ||
295 | /* do this only when cpu is driving transceiver, | |
296 | * so host won't see a low speed device... | |
297 | */ | |
298 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
299 | } | |
300 | ||
301 | #define NO_HOST_SUSPEND | |
302 | ||
303 | static int host_suspend(struct isp1301 *isp) | |
304 | { | |
305 | #ifdef NO_HOST_SUSPEND | |
306 | return 0; | |
307 | #else | |
308 | struct device *dev; | |
309 | ||
310 | if (!isp->otg.host) | |
311 | return -ENODEV; | |
312 | ||
313 | /* Currently ASSUMES only the OTG port matters; | |
314 | * other ports could be active... | |
315 | */ | |
316 | dev = isp->otg.host->controller; | |
317 | return dev->driver->suspend(dev, 3, 0); | |
318 | #endif | |
319 | } | |
320 | ||
321 | static int host_resume(struct isp1301 *isp) | |
322 | { | |
323 | #ifdef NO_HOST_SUSPEND | |
324 | return 0; | |
325 | #else | |
326 | struct device *dev; | |
327 | ||
328 | if (!isp->otg.host) | |
329 | return -ENODEV; | |
330 | ||
331 | dev = isp->otg.host->controller; | |
332 | return dev->driver->resume(dev, 0); | |
333 | #endif | |
334 | } | |
335 | ||
336 | static int gadget_suspend(struct isp1301 *isp) | |
337 | { | |
338 | isp->otg.gadget->b_hnp_enable = 0; | |
339 | isp->otg.gadget->a_hnp_support = 0; | |
340 | isp->otg.gadget->a_alt_hnp_support = 0; | |
341 | return usb_gadget_vbus_disconnect(isp->otg.gadget); | |
342 | } | |
343 | ||
344 | /*-------------------------------------------------------------------------*/ | |
345 | ||
346 | #define TIMER_MINUTES 10 | |
347 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) | |
348 | ||
349 | /* Almost all our I2C messaging comes from a work queue's task context. | |
350 | * NOTE: guaranteeing certain response times might mean we shouldn't | |
351 | * share keventd's work queue; a realtime task might be safest. | |
352 | */ | |
353 | void | |
354 | isp1301_defer_work(struct isp1301 *isp, int work) | |
355 | { | |
356 | int status; | |
357 | ||
358 | if (isp && !test_and_set_bit(work, &isp->todo)) { | |
359 | (void) get_device(&isp->client.dev); | |
360 | status = schedule_work(&isp->work); | |
361 | if (!status && !isp->working) | |
362 | dev_vdbg(&isp->client.dev, | |
363 | "work item %d may be lost\n", work); | |
364 | } | |
365 | } | |
366 | ||
367 | /* called from irq handlers */ | |
368 | static void a_idle(struct isp1301 *isp, const char *tag) | |
369 | { | |
370 | if (isp->otg.state == OTG_STATE_A_IDLE) | |
371 | return; | |
372 | ||
373 | isp->otg.default_a = 1; | |
374 | if (isp->otg.host) { | |
375 | isp->otg.host->is_b_host = 0; | |
376 | host_suspend(isp); | |
377 | } | |
378 | if (isp->otg.gadget) { | |
379 | isp->otg.gadget->is_a_peripheral = 1; | |
380 | gadget_suspend(isp); | |
381 | } | |
382 | isp->otg.state = OTG_STATE_A_IDLE; | |
383 | isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
384 | pr_debug(" --> %s/%s\n", state_name(isp), tag); | |
385 | } | |
386 | ||
387 | /* called from irq handlers */ | |
388 | static void b_idle(struct isp1301 *isp, const char *tag) | |
389 | { | |
390 | if (isp->otg.state == OTG_STATE_B_IDLE) | |
391 | return; | |
392 | ||
393 | isp->otg.default_a = 0; | |
394 | if (isp->otg.host) { | |
395 | isp->otg.host->is_b_host = 1; | |
396 | host_suspend(isp); | |
397 | } | |
398 | if (isp->otg.gadget) { | |
399 | isp->otg.gadget->is_a_peripheral = 0; | |
400 | gadget_suspend(isp); | |
401 | } | |
402 | isp->otg.state = OTG_STATE_B_IDLE; | |
403 | isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
404 | pr_debug(" --> %s/%s\n", state_name(isp), tag); | |
405 | } | |
406 | ||
407 | static void | |
408 | dump_regs(struct isp1301 *isp, const char *label) | |
409 | { | |
410 | #ifdef DEBUG | |
411 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); | |
412 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
413 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
414 | ||
415 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", | |
416 | OTG_CTRL_REG, label, state_name(isp), | |
417 | ctrl, status, src); | |
418 | /* mode control and irq enables don't change much */ | |
419 | #endif | |
420 | } | |
421 | ||
422 | /*-------------------------------------------------------------------------*/ | |
423 | ||
424 | #ifdef CONFIG_USB_OTG | |
425 | ||
426 | /* | |
427 | * The OMAP OTG controller handles most of the OTG state transitions. | |
428 | * | |
429 | * We translate isp1301 outputs (mostly voltage comparator status) into | |
430 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state | |
431 | * flags into isp1301 inputs ... and infer state transitions. | |
432 | */ | |
433 | ||
434 | #ifdef VERBOSE | |
435 | ||
436 | static void check_state(struct isp1301 *isp, const char *tag) | |
437 | { | |
438 | enum usb_otg_state state = OTG_STATE_UNDEFINED; | |
439 | u8 fsm = OTG_TEST_REG & 0x0ff; | |
440 | unsigned extra = 0; | |
441 | ||
442 | switch (fsm) { | |
443 | ||
444 | /* default-b */ | |
445 | case 0x0: | |
446 | state = OTG_STATE_B_IDLE; | |
447 | break; | |
448 | case 0x3: | |
449 | case 0x7: | |
450 | extra = 1; | |
451 | case 0x1: | |
452 | state = OTG_STATE_B_PERIPHERAL; | |
453 | break; | |
454 | case 0x11: | |
455 | state = OTG_STATE_B_SRP_INIT; | |
456 | break; | |
457 | ||
458 | /* extra dual-role default-b states */ | |
459 | case 0x12: | |
460 | case 0x13: | |
461 | case 0x16: | |
462 | extra = 1; | |
463 | case 0x17: | |
464 | state = OTG_STATE_B_WAIT_ACON; | |
465 | break; | |
466 | case 0x34: | |
467 | state = OTG_STATE_B_HOST; | |
468 | break; | |
469 | ||
470 | /* default-a */ | |
471 | case 0x36: | |
472 | state = OTG_STATE_A_IDLE; | |
473 | break; | |
474 | case 0x3c: | |
475 | state = OTG_STATE_A_WAIT_VFALL; | |
476 | break; | |
477 | case 0x7d: | |
478 | state = OTG_STATE_A_VBUS_ERR; | |
479 | break; | |
480 | case 0x9e: | |
481 | case 0x9f: | |
482 | extra = 1; | |
483 | case 0x89: | |
484 | state = OTG_STATE_A_PERIPHERAL; | |
485 | break; | |
486 | case 0xb7: | |
487 | state = OTG_STATE_A_WAIT_VRISE; | |
488 | break; | |
489 | case 0xb8: | |
490 | state = OTG_STATE_A_WAIT_BCON; | |
491 | break; | |
492 | case 0xb9: | |
493 | state = OTG_STATE_A_HOST; | |
494 | break; | |
495 | case 0xba: | |
496 | state = OTG_STATE_A_SUSPEND; | |
497 | break; | |
498 | default: | |
499 | break; | |
500 | } | |
501 | if (isp->otg.state == state && !extra) | |
502 | return; | |
503 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, | |
504 | state_string(state), fsm, state_name(isp), OTG_CTRL_REG); | |
505 | } | |
506 | ||
507 | #else | |
508 | ||
509 | static inline void check_state(struct isp1301 *isp, const char *tag) { } | |
510 | ||
511 | #endif | |
512 | ||
513 | /* outputs from ISP1301_INTERRUPT_SOURCE */ | |
514 | static void update_otg1(struct isp1301 *isp, u8 int_src) | |
515 | { | |
516 | u32 otg_ctrl; | |
517 | ||
518 | otg_ctrl = OTG_CTRL_REG | |
519 | & OTG_CTRL_MASK | |
520 | & ~OTG_XCEIV_INPUTS | |
521 | & ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); | |
522 | if (int_src & INTR_SESS_VLD) | |
523 | otg_ctrl |= OTG_ASESSVLD; | |
524 | else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) { | |
525 | a_idle(isp, "vfall"); | |
526 | otg_ctrl &= ~OTG_CTRL_BITS; | |
527 | } | |
528 | if (int_src & INTR_VBUS_VLD) | |
529 | otg_ctrl |= OTG_VBUSVLD; | |
530 | if (int_src & INTR_ID_GND) { /* default-A */ | |
531 | if (isp->otg.state == OTG_STATE_B_IDLE | |
532 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
533 | a_idle(isp, "init"); | |
534 | return; | |
535 | } | |
536 | } else { /* default-B */ | |
537 | otg_ctrl |= OTG_ID; | |
538 | if (isp->otg.state == OTG_STATE_A_IDLE | |
539 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
540 | b_idle(isp, "init"); | |
541 | return; | |
542 | } | |
543 | } | |
544 | OTG_CTRL_REG = otg_ctrl; | |
545 | } | |
546 | ||
547 | /* outputs from ISP1301_OTG_STATUS */ | |
548 | static void update_otg2(struct isp1301 *isp, u8 otg_status) | |
549 | { | |
550 | u32 otg_ctrl; | |
551 | ||
552 | otg_ctrl = OTG_CTRL_REG | |
553 | & OTG_CTRL_MASK | |
554 | & ~OTG_XCEIV_INPUTS | |
555 | & ~(OTG_BSESSVLD|OTG_BSESSEND); | |
556 | if (otg_status & OTG_B_SESS_VLD) | |
557 | otg_ctrl |= OTG_BSESSVLD; | |
558 | else if (otg_status & OTG_B_SESS_END) | |
559 | otg_ctrl |= OTG_BSESSEND; | |
560 | OTG_CTRL_REG = otg_ctrl; | |
561 | } | |
562 | ||
563 | /* inputs going to ISP1301 */ | |
564 | static void otg_update_isp(struct isp1301 *isp) | |
565 | { | |
566 | u32 otg_ctrl, otg_change; | |
567 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; | |
568 | ||
569 | otg_ctrl = OTG_CTRL_REG; | |
570 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; | |
571 | isp->last_otg_ctrl = otg_ctrl; | |
572 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; | |
573 | ||
574 | switch (isp->otg.state) { | |
575 | case OTG_STATE_B_IDLE: | |
576 | case OTG_STATE_B_PERIPHERAL: | |
577 | case OTG_STATE_B_SRP_INIT: | |
578 | if (!(otg_ctrl & OTG_PULLUP)) { | |
579 | // if (otg_ctrl & OTG_B_HNPEN) { | |
580 | if (isp->otg.gadget->b_hnp_enable) { | |
581 | isp->otg.state = OTG_STATE_B_WAIT_ACON; | |
582 | pr_debug(" --> b_wait_acon\n"); | |
583 | } | |
584 | goto pulldown; | |
585 | } | |
586 | pullup: | |
587 | set |= OTG1_DP_PULLUP; | |
588 | clr |= OTG1_DP_PULLDOWN; | |
589 | break; | |
590 | case OTG_STATE_A_SUSPEND: | |
591 | case OTG_STATE_A_PERIPHERAL: | |
592 | if (otg_ctrl & OTG_PULLUP) | |
593 | goto pullup; | |
594 | /* FALLTHROUGH */ | |
595 | // case OTG_STATE_B_WAIT_ACON: | |
596 | default: | |
597 | pulldown: | |
598 | set |= OTG1_DP_PULLDOWN; | |
599 | clr |= OTG1_DP_PULLUP; | |
600 | break; | |
601 | } | |
602 | ||
603 | # define toggle(OTG,ISP) do { \ | |
604 | if (otg_ctrl & OTG) set |= ISP; \ | |
605 | else clr |= ISP; \ | |
606 | } while (0) | |
607 | ||
608 | if (!(isp->otg.host)) | |
609 | otg_ctrl &= ~OTG_DRV_VBUS; | |
610 | ||
611 | switch (isp->otg.state) { | |
612 | case OTG_STATE_A_SUSPEND: | |
613 | if (otg_ctrl & OTG_DRV_VBUS) { | |
614 | set |= OTG1_VBUS_DRV; | |
615 | break; | |
616 | } | |
617 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ | |
618 | notresponding(isp); | |
619 | ||
620 | /* FALLTHROUGH */ | |
621 | case OTG_STATE_A_VBUS_ERR: | |
622 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
623 | pr_debug(" --> a_wait_vfall\n"); | |
624 | /* FALLTHROUGH */ | |
625 | case OTG_STATE_A_WAIT_VFALL: | |
626 | /* FIXME usbcore thinks port power is still on ... */ | |
627 | clr |= OTG1_VBUS_DRV; | |
628 | break; | |
629 | case OTG_STATE_A_IDLE: | |
630 | if (otg_ctrl & OTG_DRV_VBUS) { | |
631 | isp->otg.state = OTG_STATE_A_WAIT_VRISE; | |
632 | pr_debug(" --> a_wait_vrise\n"); | |
633 | } | |
634 | /* FALLTHROUGH */ | |
635 | default: | |
636 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); | |
637 | } | |
638 | ||
639 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); | |
640 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); | |
641 | ||
642 | # undef toggle | |
643 | ||
644 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); | |
645 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); | |
646 | ||
647 | /* HNP switch to host or peripheral; and SRP */ | |
648 | if (otg_change & OTG_PULLUP) { | |
649 | switch (isp->otg.state) { | |
650 | case OTG_STATE_B_IDLE: | |
651 | if (clr & OTG1_DP_PULLUP) | |
652 | break; | |
653 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
654 | pr_debug(" --> b_peripheral\n"); | |
655 | break; | |
656 | case OTG_STATE_A_SUSPEND: | |
657 | if (clr & OTG1_DP_PULLUP) | |
658 | break; | |
659 | isp->otg.state = OTG_STATE_A_PERIPHERAL; | |
660 | pr_debug(" --> a_peripheral\n"); | |
661 | break; | |
662 | default: | |
663 | break; | |
664 | } | |
665 | OTG_CTRL_REG |= OTG_PULLUP; | |
666 | } | |
667 | ||
668 | check_state(isp, __FUNCTION__); | |
669 | dump_regs(isp, "otg->isp1301"); | |
670 | } | |
671 | ||
672 | static irqreturn_t omap_otg_irq(int irq, void *_isp, struct pt_regs *regs) | |
673 | { | |
674 | u16 otg_irq = OTG_IRQ_SRC_REG; | |
675 | u32 otg_ctrl; | |
676 | int ret = IRQ_NONE; | |
677 | struct isp1301 *isp = _isp; | |
678 | ||
679 | /* update ISP1301 transciever from OTG controller */ | |
680 | if (otg_irq & OPRT_CHG) { | |
681 | OTG_IRQ_SRC_REG = OPRT_CHG; | |
682 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
683 | ret = IRQ_HANDLED; | |
684 | ||
685 | /* SRP to become b_peripheral failed */ | |
686 | } else if (otg_irq & B_SRP_TMROUT) { | |
687 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", OTG_CTRL_REG); | |
688 | notresponding(isp); | |
689 | ||
690 | /* gadget drivers that care should monitor all kinds of | |
691 | * remote wakeup (SRP, normal) using their own timer | |
692 | * to give "check cable and A-device" messages. | |
693 | */ | |
694 | if (isp->otg.state == OTG_STATE_B_SRP_INIT) | |
695 | b_idle(isp, "srp_timeout"); | |
696 | ||
697 | OTG_IRQ_SRC_REG = B_SRP_TMROUT; | |
698 | ret = IRQ_HANDLED; | |
699 | ||
700 | /* HNP to become b_host failed */ | |
701 | } else if (otg_irq & B_HNP_FAIL) { | |
702 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", | |
703 | state_name(isp), OTG_CTRL_REG); | |
704 | notresponding(isp); | |
705 | ||
706 | otg_ctrl = OTG_CTRL_REG; | |
707 | otg_ctrl |= OTG_BUSDROP; | |
708 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
709 | OTG_CTRL_REG = otg_ctrl; | |
710 | ||
711 | /* subset of b_peripheral()... */ | |
712 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
713 | pr_debug(" --> b_peripheral\n"); | |
714 | ||
715 | OTG_IRQ_SRC_REG = B_HNP_FAIL; | |
716 | ret = IRQ_HANDLED; | |
717 | ||
718 | /* detect SRP from B-device ... */ | |
719 | } else if (otg_irq & A_SRP_DETECT) { | |
720 | pr_debug("otg: %s SRP_DETECT, %06x\n", | |
721 | state_name(isp), OTG_CTRL_REG); | |
722 | ||
723 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
724 | switch (isp->otg.state) { | |
725 | case OTG_STATE_A_IDLE: | |
726 | if (!isp->otg.host) | |
727 | break; | |
728 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
729 | otg_ctrl = OTG_CTRL_REG; | |
730 | otg_ctrl |= OTG_A_BUSREQ; | |
731 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
732 | & ~OTG_XCEIV_INPUTS | |
733 | & OTG_CTRL_MASK; | |
734 | OTG_CTRL_REG = otg_ctrl; | |
735 | break; | |
736 | default: | |
737 | break; | |
738 | } | |
739 | ||
740 | OTG_IRQ_SRC_REG = A_SRP_DETECT; | |
741 | ret = IRQ_HANDLED; | |
742 | ||
743 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) | |
744 | * we don't track them separately | |
745 | */ | |
746 | } else if (otg_irq & A_REQ_TMROUT) { | |
747 | otg_ctrl = OTG_CTRL_REG; | |
748 | pr_info("otg: BCON_TMOUT from %s, %06x\n", | |
749 | state_name(isp), otg_ctrl); | |
750 | notresponding(isp); | |
751 | ||
752 | otg_ctrl |= OTG_BUSDROP; | |
753 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
754 | OTG_CTRL_REG = otg_ctrl; | |
755 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
756 | ||
757 | OTG_IRQ_SRC_REG = A_REQ_TMROUT; | |
758 | ret = IRQ_HANDLED; | |
759 | ||
760 | /* A-supplied voltage fell too low; overcurrent */ | |
761 | } else if (otg_irq & A_VBUS_ERR) { | |
762 | otg_ctrl = OTG_CTRL_REG; | |
763 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", | |
764 | state_name(isp), otg_irq, otg_ctrl); | |
765 | ||
766 | otg_ctrl |= OTG_BUSDROP; | |
767 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
768 | OTG_CTRL_REG = otg_ctrl; | |
769 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
770 | ||
771 | OTG_IRQ_SRC_REG = A_VBUS_ERR; | |
772 | ret = IRQ_HANDLED; | |
773 | ||
774 | /* switch driver; the transciever code activates it, | |
775 | * ungating the udc clock or resuming OHCI. | |
776 | */ | |
777 | } else if (otg_irq & DRIVER_SWITCH) { | |
778 | int kick = 0; | |
779 | ||
780 | otg_ctrl = OTG_CTRL_REG; | |
781 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", | |
782 | state_name(isp), | |
783 | (otg_ctrl & OTG_DRIVER_SEL) | |
784 | ? "gadget" : "host", | |
785 | otg_ctrl); | |
786 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
787 | ||
788 | /* role is peripheral */ | |
789 | if (otg_ctrl & OTG_DRIVER_SEL) { | |
790 | switch (isp->otg.state) { | |
791 | case OTG_STATE_A_IDLE: | |
792 | b_idle(isp, __FUNCTION__); | |
793 | break; | |
794 | default: | |
795 | break; | |
796 | } | |
797 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
798 | ||
799 | /* role is host */ | |
800 | } else { | |
801 | if (!(otg_ctrl & OTG_ID)) { | |
802 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
803 | OTG_CTRL_REG = otg_ctrl | OTG_A_BUSREQ; | |
804 | } | |
805 | ||
806 | if (isp->otg.host) { | |
807 | switch (isp->otg.state) { | |
808 | case OTG_STATE_B_WAIT_ACON: | |
809 | isp->otg.state = OTG_STATE_B_HOST; | |
810 | pr_debug(" --> b_host\n"); | |
811 | kick = 1; | |
812 | break; | |
813 | case OTG_STATE_A_WAIT_BCON: | |
814 | isp->otg.state = OTG_STATE_A_HOST; | |
815 | pr_debug(" --> a_host\n"); | |
816 | break; | |
817 | case OTG_STATE_A_PERIPHERAL: | |
818 | isp->otg.state = OTG_STATE_A_WAIT_BCON; | |
819 | pr_debug(" --> a_wait_bcon\n"); | |
820 | break; | |
821 | default: | |
822 | break; | |
823 | } | |
824 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
825 | } | |
826 | } | |
827 | ||
828 | OTG_IRQ_SRC_REG = DRIVER_SWITCH; | |
829 | ret = IRQ_HANDLED; | |
830 | ||
831 | if (kick) | |
832 | usb_bus_start_enum(isp->otg.host, | |
833 | isp->otg.host->otg_port); | |
834 | } | |
835 | ||
836 | check_state(isp, __FUNCTION__); | |
837 | return ret; | |
838 | } | |
839 | ||
840 | static struct platform_device *otg_dev; | |
841 | ||
842 | static int otg_init(struct isp1301 *isp) | |
843 | { | |
844 | if (!otg_dev) | |
845 | return -ENODEV; | |
846 | ||
847 | dump_regs(isp, __FUNCTION__); | |
848 | /* some of these values are board-specific... */ | |
849 | OTG_SYSCON_2_REG |= OTG_EN | |
850 | /* for B-device: */ | |
851 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ | |
852 | | SRP_GPDVBUS /* discharge after VBUS pulse */ | |
853 | // | (3 << 24) /* 2msec VBUS pulse */ | |
854 | /* for A-device: */ | |
855 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ | |
856 | | SRP_DPW /* detect 167+ns SRP pulses */ | |
857 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ | |
858 | ; | |
859 | ||
860 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
861 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
862 | ||
863 | check_state(isp, __FUNCTION__); | |
864 | pr_debug("otg: %s, %s %06x\n", | |
865 | state_name(isp), __FUNCTION__, OTG_CTRL_REG); | |
866 | ||
867 | OTG_IRQ_EN_REG = DRIVER_SWITCH | OPRT_CHG | |
868 | | B_SRP_TMROUT | B_HNP_FAIL | |
869 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT; | |
870 | OTG_SYSCON_2_REG |= OTG_EN; | |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
3ae5eaec | 875 | static int otg_probe(struct platform_device *dev) |
1da177e4 LT |
876 | { |
877 | // struct omap_usb_config *config = dev->platform_data; | |
878 | ||
3ae5eaec | 879 | otg_dev = dev; |
1da177e4 LT |
880 | return 0; |
881 | } | |
882 | ||
3ae5eaec | 883 | static int otg_remove(struct platform_device *dev) |
1da177e4 LT |
884 | { |
885 | otg_dev = 0; | |
886 | return 0; | |
887 | } | |
888 | ||
3ae5eaec | 889 | struct platform_driver omap_otg_driver = { |
1da177e4 | 890 | .probe = otg_probe, |
3ae5eaec RK |
891 | .remove = otg_remove, |
892 | .driver = { | |
893 | .owner = THIS_MODULE, | |
894 | .name = "omap_otg", | |
895 | }, | |
1da177e4 LT |
896 | }; |
897 | ||
898 | static int otg_bind(struct isp1301 *isp) | |
899 | { | |
900 | int status; | |
901 | ||
902 | if (otg_dev) | |
903 | return -EBUSY; | |
904 | ||
3ae5eaec | 905 | status = platform_driver_register(&omap_otg_driver); |
1da177e4 LT |
906 | if (status < 0) |
907 | return status; | |
908 | ||
909 | if (otg_dev) | |
910 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, | |
dace1453 | 911 | IRQF_DISABLED, DRIVER_NAME, isp); |
1da177e4 LT |
912 | else |
913 | status = -ENODEV; | |
914 | ||
915 | if (status < 0) | |
3ae5eaec | 916 | platform_driver_unregister(&omap_otg_driver); |
1da177e4 LT |
917 | return status; |
918 | } | |
919 | ||
920 | static void otg_unbind(struct isp1301 *isp) | |
921 | { | |
922 | if (!otg_dev) | |
923 | return; | |
924 | free_irq(otg_dev->resource[1].start, isp); | |
925 | } | |
926 | ||
927 | #else | |
928 | ||
929 | /* OTG controller isn't clocked */ | |
930 | ||
931 | #endif /* CONFIG_USB_OTG */ | |
932 | ||
933 | /*-------------------------------------------------------------------------*/ | |
934 | ||
935 | static void b_peripheral(struct isp1301 *isp) | |
936 | { | |
937 | OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
938 | usb_gadget_vbus_connect(isp->otg.gadget); | |
939 | ||
940 | #ifdef CONFIG_USB_OTG | |
941 | enable_vbus_draw(isp, 8); | |
942 | otg_update_isp(isp); | |
943 | #else | |
944 | enable_vbus_draw(isp, 100); | |
945 | /* UDC driver just set OTG_BSESSVLD */ | |
946 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); | |
947 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); | |
948 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
949 | pr_debug(" --> b_peripheral\n"); | |
950 | dump_regs(isp, "2periph"); | |
951 | #endif | |
952 | } | |
953 | ||
954 | static void isp_update_otg(struct isp1301 *isp, u8 stat) | |
955 | { | |
956 | u8 isp_stat, isp_bstat; | |
957 | enum usb_otg_state state = isp->otg.state; | |
958 | ||
959 | if (stat & INTR_BDIS_ACON) | |
960 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); | |
961 | ||
962 | /* start certain state transitions right away */ | |
963 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
964 | if (isp_stat & INTR_ID_GND) { | |
965 | if (isp->otg.default_a) { | |
966 | switch (state) { | |
967 | case OTG_STATE_B_IDLE: | |
968 | a_idle(isp, "idle"); | |
969 | /* FALLTHROUGH */ | |
970 | case OTG_STATE_A_IDLE: | |
971 | enable_vbus_source(isp); | |
972 | /* FALLTHROUGH */ | |
973 | case OTG_STATE_A_WAIT_VRISE: | |
974 | /* we skip over OTG_STATE_A_WAIT_BCON, since | |
975 | * the HC will transition to A_HOST (or | |
976 | * A_SUSPEND!) without our noticing except | |
977 | * when HNP is used. | |
978 | */ | |
979 | if (isp_stat & INTR_VBUS_VLD) | |
980 | isp->otg.state = OTG_STATE_A_HOST; | |
981 | break; | |
982 | case OTG_STATE_A_WAIT_VFALL: | |
983 | if (!(isp_stat & INTR_SESS_VLD)) | |
984 | a_idle(isp, "vfell"); | |
985 | break; | |
986 | default: | |
987 | if (!(isp_stat & INTR_VBUS_VLD)) | |
988 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
989 | break; | |
990 | } | |
991 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
992 | } else { | |
993 | switch (state) { | |
994 | case OTG_STATE_B_PERIPHERAL: | |
995 | case OTG_STATE_B_HOST: | |
996 | case OTG_STATE_B_WAIT_ACON: | |
997 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
998 | break; | |
999 | default: | |
1000 | break; | |
1001 | } | |
1002 | if (state != OTG_STATE_A_IDLE) | |
1003 | a_idle(isp, "id"); | |
1004 | if (isp->otg.host && state == OTG_STATE_A_IDLE) | |
1005 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
1006 | isp_bstat = 0; | |
1007 | } | |
1008 | } else { | |
1009 | /* if user unplugged mini-A end of cable, | |
1010 | * don't bypass A_WAIT_VFALL. | |
1011 | */ | |
1012 | if (isp->otg.default_a) { | |
1013 | switch (state) { | |
1014 | default: | |
1015 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
1016 | break; | |
1017 | case OTG_STATE_A_WAIT_VFALL: | |
1018 | state = OTG_STATE_A_IDLE; | |
1019 | /* khubd may take a while to notice and | |
1020 | * handle this disconnect, so don't go | |
1021 | * to B_IDLE quite yet. | |
1022 | */ | |
1023 | break; | |
1024 | case OTG_STATE_A_IDLE: | |
1025 | host_suspend(isp); | |
1026 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, | |
1027 | MC1_BDIS_ACON_EN); | |
1028 | isp->otg.state = OTG_STATE_B_IDLE; | |
1029 | OTG_CTRL_REG &= OTG_CTRL_REG & OTG_CTRL_MASK | |
1030 | & ~OTG_CTRL_BITS; | |
1031 | break; | |
1032 | case OTG_STATE_B_IDLE: | |
1033 | break; | |
1034 | } | |
1035 | } | |
1036 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1037 | ||
1038 | switch (isp->otg.state) { | |
1039 | case OTG_STATE_B_PERIPHERAL: | |
1040 | case OTG_STATE_B_WAIT_ACON: | |
1041 | case OTG_STATE_B_HOST: | |
1042 | if (likely(isp_bstat & OTG_B_SESS_VLD)) | |
1043 | break; | |
1044 | enable_vbus_draw(isp, 0); | |
1045 | #ifndef CONFIG_USB_OTG | |
1046 | /* UDC driver will clear OTG_BSESSVLD */ | |
1047 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1048 | OTG1_DP_PULLDOWN); | |
1049 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1050 | OTG1_DP_PULLUP); | |
1051 | dump_regs(isp, __FUNCTION__); | |
1052 | #endif | |
1053 | /* FALLTHROUGH */ | |
1054 | case OTG_STATE_B_SRP_INIT: | |
1055 | b_idle(isp, __FUNCTION__); | |
1056 | OTG_CTRL_REG &= OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
1057 | /* FALLTHROUGH */ | |
1058 | case OTG_STATE_B_IDLE: | |
1059 | if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) { | |
1060 | #ifdef CONFIG_USB_OTG | |
1061 | update_otg1(isp, isp_stat); | |
1062 | update_otg2(isp, isp_bstat); | |
1063 | #endif | |
1064 | b_peripheral(isp); | |
1065 | } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) | |
1066 | isp_bstat |= OTG_B_SESS_END; | |
1067 | break; | |
1068 | case OTG_STATE_A_WAIT_VFALL: | |
1069 | break; | |
1070 | default: | |
1071 | pr_debug("otg: unsupported b-device %s\n", | |
1072 | state_name(isp)); | |
1073 | break; | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | if (state != isp->otg.state) | |
1078 | pr_debug(" isp, %s -> %s\n", | |
1079 | state_string(state), state_name(isp)); | |
1080 | ||
1081 | #ifdef CONFIG_USB_OTG | |
1082 | /* update the OTG controller state to match the isp1301; may | |
1083 | * trigger OPRT_CHG irqs for changes going to the isp1301. | |
1084 | */ | |
1085 | update_otg1(isp, isp_stat); | |
1086 | update_otg2(isp, isp_bstat); | |
1087 | check_state(isp, __FUNCTION__); | |
1088 | #endif | |
1089 | ||
1090 | dump_regs(isp, "isp1301->otg"); | |
1091 | } | |
1092 | ||
1093 | /*-------------------------------------------------------------------------*/ | |
1094 | ||
1095 | static u8 isp1301_clear_latch(struct isp1301 *isp) | |
1096 | { | |
1097 | u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); | |
1098 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); | |
1099 | return latch; | |
1100 | } | |
1101 | ||
1102 | static void | |
1103 | isp1301_work(void *data) | |
1104 | { | |
1105 | struct isp1301 *isp = data; | |
1106 | int stop; | |
1107 | ||
1108 | /* implicit lock: we're the only task using this device */ | |
1109 | isp->working = 1; | |
1110 | do { | |
1111 | stop = test_bit(WORK_STOP, &isp->todo); | |
1112 | ||
1113 | #ifdef CONFIG_USB_OTG | |
1114 | /* transfer state from otg engine to isp1301 */ | |
1115 | if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { | |
1116 | otg_update_isp(isp); | |
1117 | put_device(&isp->client.dev); | |
1118 | } | |
1119 | #endif | |
1120 | /* transfer state from isp1301 to otg engine */ | |
1121 | if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { | |
1122 | u8 stat = isp1301_clear_latch(isp); | |
1123 | ||
1124 | isp_update_otg(isp, stat); | |
1125 | put_device(&isp->client.dev); | |
1126 | } | |
1127 | ||
1128 | if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { | |
1129 | u32 otg_ctrl; | |
1130 | ||
1131 | /* | |
1132 | * skip A_WAIT_VRISE; hc transitions invisibly | |
1133 | * skip A_WAIT_BCON; same. | |
1134 | */ | |
1135 | switch (isp->otg.state) { | |
1136 | case OTG_STATE_A_WAIT_BCON: | |
1137 | case OTG_STATE_A_WAIT_VRISE: | |
1138 | isp->otg.state = OTG_STATE_A_HOST; | |
1139 | pr_debug(" --> a_host\n"); | |
1140 | otg_ctrl = OTG_CTRL_REG; | |
1141 | otg_ctrl |= OTG_A_BUSREQ; | |
1142 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
1143 | & OTG_CTRL_MASK; | |
1144 | OTG_CTRL_REG = otg_ctrl; | |
1145 | break; | |
1146 | case OTG_STATE_B_WAIT_ACON: | |
1147 | isp->otg.state = OTG_STATE_B_HOST; | |
1148 | pr_debug(" --> b_host (acon)\n"); | |
1149 | break; | |
1150 | case OTG_STATE_B_HOST: | |
1151 | case OTG_STATE_B_IDLE: | |
1152 | case OTG_STATE_A_IDLE: | |
1153 | break; | |
1154 | default: | |
1155 | pr_debug(" host resume in %s\n", | |
1156 | state_name(isp)); | |
1157 | } | |
1158 | host_resume(isp); | |
1159 | // mdelay(10); | |
1160 | put_device(&isp->client.dev); | |
1161 | } | |
1162 | ||
1163 | if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { | |
1164 | #ifdef VERBOSE | |
1165 | dump_regs(isp, "timer"); | |
1166 | if (!stop) | |
1167 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1168 | #endif | |
1169 | put_device(&isp->client.dev); | |
1170 | } | |
1171 | ||
1172 | if (isp->todo) | |
1173 | dev_vdbg(&isp->client.dev, | |
1174 | "work done, todo = 0x%lx\n", | |
1175 | isp->todo); | |
1176 | if (stop) { | |
1177 | dev_dbg(&isp->client.dev, "stop\n"); | |
1178 | break; | |
1179 | } | |
1180 | } while (isp->todo); | |
1181 | isp->working = 0; | |
1182 | } | |
1183 | ||
1184 | static irqreturn_t isp1301_irq(int irq, void *isp, struct pt_regs *regs) | |
1185 | { | |
1186 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
1187 | return IRQ_HANDLED; | |
1188 | } | |
1189 | ||
1190 | static void isp1301_timer(unsigned long _isp) | |
1191 | { | |
1192 | isp1301_defer_work((void *)_isp, WORK_TIMER); | |
1193 | } | |
1194 | ||
1195 | /*-------------------------------------------------------------------------*/ | |
1196 | ||
1197 | static void isp1301_release(struct device *dev) | |
1198 | { | |
1199 | struct isp1301 *isp; | |
1200 | ||
1201 | isp = container_of(dev, struct isp1301, client.dev); | |
1202 | ||
1203 | /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ | |
1204 | if (isp->i2c_release) | |
1205 | isp->i2c_release(dev); | |
1206 | kfree (isp); | |
1207 | } | |
1208 | ||
1209 | static struct isp1301 *the_transceiver; | |
1210 | ||
1211 | static int isp1301_detach_client(struct i2c_client *i2c) | |
1212 | { | |
1213 | struct isp1301 *isp; | |
1214 | ||
1215 | isp = container_of(i2c, struct isp1301, client); | |
1216 | ||
1217 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1218 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1219 | free_irq(isp->irq, isp); | |
1220 | #ifdef CONFIG_USB_OTG | |
1221 | otg_unbind(isp); | |
1222 | #endif | |
1223 | if (machine_is_omap_h2()) | |
1224 | omap_free_gpio(2); | |
1225 | ||
1226 | isp->timer.data = 0; | |
1227 | set_bit(WORK_STOP, &isp->todo); | |
1228 | del_timer_sync(&isp->timer); | |
1229 | flush_scheduled_work(); | |
1230 | ||
1231 | put_device(&i2c->dev); | |
1232 | the_transceiver = 0; | |
1233 | ||
1234 | return i2c_detach_client(i2c); | |
1235 | } | |
1236 | ||
1237 | /*-------------------------------------------------------------------------*/ | |
1238 | ||
1239 | /* NOTE: three modes are possible here, only one of which | |
1240 | * will be standards-conformant on any given system: | |
1241 | * | |
1242 | * - OTG mode (dual-role), required if there's a Mini-AB connector | |
1243 | * - HOST mode, for when there's one or more A (host) connectors | |
1244 | * - DEVICE mode, for when there's a B/Mini-B (device) connector | |
1245 | * | |
1246 | * As a rule, you won't have an isp1301 chip unless it's there to | |
1247 | * support the OTG mode. Other modes help testing USB controllers | |
1248 | * in isolation from (full) OTG support, or maybe so later board | |
1249 | * revisions can help to support those feature. | |
1250 | */ | |
1251 | ||
1252 | #ifdef CONFIG_USB_OTG | |
1253 | ||
1254 | static int isp1301_otg_enable(struct isp1301 *isp) | |
1255 | { | |
1256 | power_up(isp); | |
1257 | otg_init(isp); | |
1258 | ||
1259 | /* NOTE: since we don't change this, this provides | |
1260 | * a few more interrupts than are strictly needed. | |
1261 | */ | |
1262 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
1263 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); | |
1264 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, | |
1265 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); | |
1266 | ||
1267 | dev_info(&isp->client.dev, "ready for dual-role USB ...\n"); | |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | #endif | |
1273 | ||
1274 | /* add or disable the host device+driver */ | |
1275 | static int | |
1276 | isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host) | |
1277 | { | |
1278 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
1279 | ||
1280 | if (!otg || isp != the_transceiver) | |
1281 | return -ENODEV; | |
1282 | ||
1283 | if (!host) { | |
1284 | OTG_IRQ_EN_REG = 0; | |
1285 | power_down(isp); | |
1286 | isp->otg.host = 0; | |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | #ifdef CONFIG_USB_OTG | |
1291 | isp->otg.host = host; | |
1292 | dev_dbg(&isp->client.dev, "registered host\n"); | |
1293 | host_suspend(isp); | |
1294 | if (isp->otg.gadget) | |
1295 | return isp1301_otg_enable(isp); | |
1296 | return 0; | |
1297 | ||
1298 | #elif !defined(CONFIG_USB_GADGET_OMAP) | |
1299 | // FIXME update its refcount | |
1300 | isp->otg.host = host; | |
1301 | ||
1302 | power_up(isp); | |
1303 | ||
1304 | if (machine_is_omap_h2()) | |
1305 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1306 | ||
1307 | dev_info(&isp->client.dev, "A-Host sessions ok\n"); | |
1308 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
1309 | INTR_ID_GND); | |
1310 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, | |
1311 | INTR_ID_GND); | |
1312 | ||
1313 | /* If this has a Mini-AB connector, this mode is highly | |
1314 | * nonstandard ... but can be handy for testing, especially with | |
1315 | * the Mini-A end of an OTG cable. (Or something nonstandard | |
1316 | * like MiniB-to-StandardB, maybe built with a gender mender.) | |
1317 | */ | |
1318 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); | |
1319 | ||
1320 | dump_regs(isp, __FUNCTION__); | |
1321 | ||
1322 | return 0; | |
1323 | ||
1324 | #else | |
1325 | dev_dbg(&isp->client.dev, "host sessions not allowed\n"); | |
1326 | return -EINVAL; | |
1327 | #endif | |
1328 | ||
1329 | } | |
1330 | ||
1331 | static int | |
1332 | isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) | |
1333 | { | |
1334 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
1335 | ||
1336 | if (!otg || isp != the_transceiver) | |
1337 | return -ENODEV; | |
1338 | ||
1339 | if (!gadget) { | |
1340 | OTG_IRQ_EN_REG = 0; | |
1341 | if (!isp->otg.default_a) | |
1342 | enable_vbus_draw(isp, 0); | |
1343 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
1344 | isp->otg.gadget = 0; | |
1345 | power_down(isp); | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | #ifdef CONFIG_USB_OTG | |
1350 | isp->otg.gadget = gadget; | |
1351 | dev_dbg(&isp->client.dev, "registered gadget\n"); | |
1352 | /* gadget driver may be suspended until vbus_connect () */ | |
1353 | if (isp->otg.host) | |
1354 | return isp1301_otg_enable(isp); | |
1355 | return 0; | |
1356 | ||
1357 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) | |
1358 | isp->otg.gadget = gadget; | |
1359 | // FIXME update its refcount | |
1360 | ||
1361 | OTG_CTRL_REG = (OTG_CTRL_REG & OTG_CTRL_MASK | |
1362 | & ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS)) | |
1363 | | OTG_ID; | |
1364 | power_up(isp); | |
1365 | isp->otg.state = OTG_STATE_B_IDLE; | |
1366 | ||
1367 | if (machine_is_omap_h2()) | |
1368 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1369 | ||
1370 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
1371 | INTR_SESS_VLD); | |
1372 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, | |
1373 | INTR_VBUS_VLD); | |
1374 | dev_info(&isp->client.dev, "B-Peripheral sessions ok\n"); | |
1375 | dump_regs(isp, __FUNCTION__); | |
1376 | ||
1377 | /* If this has a Mini-AB connector, this mode is highly | |
1378 | * nonstandard ... but can be handy for testing, so long | |
1379 | * as you don't plug a Mini-A cable into the jack. | |
1380 | */ | |
1381 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) | |
1382 | b_peripheral(isp); | |
1383 | ||
1384 | return 0; | |
1385 | ||
1386 | #else | |
1387 | dev_dbg(&isp->client.dev, "peripheral sessions not allowed\n"); | |
1388 | return -EINVAL; | |
1389 | #endif | |
1390 | } | |
1391 | ||
1392 | ||
1393 | /*-------------------------------------------------------------------------*/ | |
1394 | ||
1395 | static int | |
1396 | isp1301_set_power(struct otg_transceiver *dev, unsigned mA) | |
1397 | { | |
1398 | if (!the_transceiver) | |
1399 | return -ENODEV; | |
1400 | if (dev->state == OTG_STATE_B_PERIPHERAL) | |
1401 | enable_vbus_draw(the_transceiver, mA); | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | static int | |
1406 | isp1301_start_srp(struct otg_transceiver *dev) | |
1407 | { | |
1408 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1409 | u32 otg_ctrl; | |
1410 | ||
1411 | if (!dev || isp != the_transceiver | |
1412 | || isp->otg.state != OTG_STATE_B_IDLE) | |
1413 | return -ENODEV; | |
1414 | ||
1415 | otg_ctrl = OTG_CTRL_REG; | |
1416 | if (!(otg_ctrl & OTG_BSESSEND)) | |
1417 | return -EINVAL; | |
1418 | ||
1419 | otg_ctrl |= OTG_B_BUSREQ; | |
1420 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; | |
1421 | OTG_CTRL_REG = otg_ctrl; | |
1422 | isp->otg.state = OTG_STATE_B_SRP_INIT; | |
1423 | ||
1424 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), OTG_CTRL_REG); | |
1425 | #ifdef CONFIG_USB_OTG | |
1426 | check_state(isp, __FUNCTION__); | |
1427 | #endif | |
1428 | return 0; | |
1429 | } | |
1430 | ||
1431 | static int | |
1432 | isp1301_start_hnp(struct otg_transceiver *dev) | |
1433 | { | |
1434 | #ifdef CONFIG_USB_OTG | |
1435 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1436 | ||
1437 | if (!dev || isp != the_transceiver) | |
1438 | return -ENODEV; | |
1439 | if (isp->otg.default_a && (isp->otg.host == NULL | |
1440 | || !isp->otg.host->b_hnp_enable)) | |
1441 | return -ENOTCONN; | |
1442 | if (!isp->otg.default_a && (isp->otg.gadget == NULL | |
1443 | || !isp->otg.gadget->b_hnp_enable)) | |
1444 | return -ENOTCONN; | |
1445 | ||
1446 | /* We want hardware to manage most HNP protocol timings. | |
1447 | * So do this part as early as possible... | |
1448 | */ | |
1449 | switch (isp->otg.state) { | |
1450 | case OTG_STATE_B_HOST: | |
1451 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
1452 | /* caller will suspend next */ | |
1453 | break; | |
1454 | case OTG_STATE_A_HOST: | |
1455 | #if 0 | |
1456 | /* autoconnect mode avoids irq latency bugs */ | |
1457 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1458 | MC1_BDIS_ACON_EN); | |
1459 | #endif | |
1460 | /* caller must suspend then clear A_BUSREQ */ | |
1461 | usb_gadget_vbus_connect(isp->otg.gadget); | |
1462 | OTG_CTRL_REG |= OTG_A_SETB_HNPEN; | |
1463 | ||
1464 | break; | |
1465 | case OTG_STATE_A_PERIPHERAL: | |
1466 | /* initiated by B-Host suspend */ | |
1467 | break; | |
1468 | default: | |
1469 | return -EILSEQ; | |
1470 | } | |
1471 | pr_debug("otg: HNP %s, %06x ...\n", | |
1472 | state_name(isp), OTG_CTRL_REG); | |
1473 | check_state(isp, __FUNCTION__); | |
1474 | return 0; | |
1475 | #else | |
1476 | /* srp-only */ | |
1477 | return -EINVAL; | |
1478 | #endif | |
1479 | } | |
1480 | ||
1481 | /*-------------------------------------------------------------------------*/ | |
1482 | ||
1483 | /* no error returns, they'd just make bus scanning stop */ | |
1484 | static int isp1301_probe(struct i2c_adapter *bus, int address, int kind) | |
1485 | { | |
1486 | int status; | |
1487 | struct isp1301 *isp; | |
1488 | struct i2c_client *i2c; | |
1489 | ||
1490 | if (the_transceiver) | |
1491 | return 0; | |
1492 | ||
82ca76b6 | 1493 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
1da177e4 LT |
1494 | if (!isp) |
1495 | return 0; | |
1496 | ||
1497 | INIT_WORK(&isp->work, isp1301_work, isp); | |
1498 | init_timer(&isp->timer); | |
1499 | isp->timer.function = isp1301_timer; | |
1500 | isp->timer.data = (unsigned long) isp; | |
1501 | ||
1502 | isp->irq = -1; | |
1503 | isp->client.addr = address; | |
1504 | i2c_set_clientdata(&isp->client, isp); | |
1505 | isp->client.adapter = bus; | |
1506 | isp->client.driver = &isp1301_driver; | |
1507 | strlcpy(isp->client.name, DRIVER_NAME, I2C_NAME_SIZE); | |
1508 | i2c = &isp->client; | |
1509 | ||
1510 | /* if this is a true probe, verify the chip ... */ | |
1511 | if (kind < 0) { | |
1512 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); | |
1513 | if (status != I2C_VENDOR_ID_PHILIPS) { | |
1514 | dev_dbg(&bus->dev, "addr %d not philips id: %d\n", | |
1515 | address, status); | |
1516 | goto fail1; | |
1517 | } | |
1518 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); | |
1519 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { | |
1520 | dev_dbg(&bus->dev, "%d not isp1301, %d\n", | |
1521 | address, status); | |
1522 | goto fail1; | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | status = i2c_attach_client(i2c); | |
1527 | if (status < 0) { | |
1528 | dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n", | |
1529 | DRIVER_NAME, address, status); | |
1530 | fail1: | |
1531 | kfree(isp); | |
1532 | return 0; | |
1533 | } | |
1534 | isp->i2c_release = i2c->dev.release; | |
1535 | i2c->dev.release = isp1301_release; | |
1536 | ||
1537 | /* initial development used chiprev 2.00 */ | |
1538 | status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); | |
1539 | dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", | |
1540 | status >> 8, status & 0xff); | |
1541 | ||
1542 | /* make like power-on reset */ | |
1543 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); | |
1544 | ||
1545 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); | |
1546 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); | |
1547 | ||
1548 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1549 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); | |
1550 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1551 | ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
1552 | ||
1553 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); | |
1554 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1555 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1556 | ||
1557 | #ifdef CONFIG_USB_OTG | |
1558 | status = otg_bind(isp); | |
1559 | if (status < 0) { | |
1560 | dev_dbg(&i2c->dev, "can't bind OTG\n"); | |
1561 | goto fail2; | |
1562 | } | |
1563 | #endif | |
1564 | ||
1565 | if (machine_is_omap_h2()) { | |
1566 | /* full speed signaling by default */ | |
1567 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1568 | MC1_SPEED_REG); | |
1569 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, | |
1570 | MC2_SPD_SUSP_CTRL); | |
1571 | ||
1572 | /* IRQ wired at M14 */ | |
1573 | omap_cfg_reg(M14_1510_GPIO2); | |
1574 | isp->irq = OMAP_GPIO_IRQ(2); | |
1575 | omap_request_gpio(2); | |
1576 | omap_set_gpio_direction(2, 1); | |
1577 | omap_set_gpio_edge_ctrl(2, OMAP_GPIO_FALLING_EDGE); | |
1578 | } | |
1579 | ||
1580 | status = request_irq(isp->irq, isp1301_irq, | |
dace1453 | 1581 | IRQF_SAMPLE_RANDOM, DRIVER_NAME, isp); |
1da177e4 LT |
1582 | if (status < 0) { |
1583 | dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", | |
1584 | isp->irq, status); | |
1585 | #ifdef CONFIG_USB_OTG | |
1586 | fail2: | |
1587 | #endif | |
1588 | i2c_detach_client(i2c); | |
1589 | goto fail1; | |
1590 | } | |
1591 | ||
1592 | isp->otg.dev = &isp->client.dev; | |
1593 | isp->otg.label = DRIVER_NAME; | |
1594 | ||
1595 | isp->otg.set_host = isp1301_set_host, | |
1596 | isp->otg.set_peripheral = isp1301_set_peripheral, | |
1597 | isp->otg.set_power = isp1301_set_power, | |
1598 | isp->otg.start_srp = isp1301_start_srp, | |
1599 | isp->otg.start_hnp = isp1301_start_hnp, | |
1600 | ||
1601 | enable_vbus_draw(isp, 0); | |
1602 | power_down(isp); | |
1603 | the_transceiver = isp; | |
1604 | ||
1605 | #ifdef CONFIG_USB_OTG | |
1606 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
1607 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
1608 | #endif | |
1609 | ||
1610 | dump_regs(isp, __FUNCTION__); | |
1611 | ||
1612 | #ifdef VERBOSE | |
1613 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1614 | dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); | |
1615 | #endif | |
1616 | ||
1617 | status = otg_set_transceiver(&isp->otg); | |
1618 | if (status < 0) | |
1619 | dev_err(&i2c->dev, "can't register transceiver, %d\n", | |
1620 | status); | |
1621 | ||
1622 | return 0; | |
1623 | } | |
1624 | ||
1625 | static int isp1301_scan_bus(struct i2c_adapter *bus) | |
1626 | { | |
1627 | if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA | |
1628 | | I2C_FUNC_SMBUS_READ_WORD_DATA)) | |
1629 | return -EINVAL; | |
1630 | return i2c_probe(bus, &addr_data, isp1301_probe); | |
1631 | } | |
1632 | ||
1633 | static struct i2c_driver isp1301_driver = { | |
a9718b0c | 1634 | .driver = { |
a9718b0c LR |
1635 | .name = "isp1301_omap", |
1636 | }, | |
1da177e4 LT |
1637 | .attach_adapter = isp1301_scan_bus, |
1638 | .detach_client = isp1301_detach_client, | |
1639 | }; | |
1640 | ||
1641 | /*-------------------------------------------------------------------------*/ | |
1642 | ||
1643 | static int __init isp_init(void) | |
1644 | { | |
1645 | return i2c_add_driver(&isp1301_driver); | |
1646 | } | |
1647 | module_init(isp_init); | |
1648 | ||
1649 | static void __exit isp_exit(void) | |
1650 | { | |
1651 | if (the_transceiver) | |
1652 | otg_set_transceiver(0); | |
1653 | i2c_del_driver(&isp1301_driver); | |
1654 | } | |
1655 | module_exit(isp_exit); | |
1656 |