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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 | ||
24 | #include <linux/config.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/interrupt.h> | |
d052d1be | 30 | #include <linux/platform_device.h> |
1da177e4 LT |
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/i2c.h> | |
36 | #include <linux/workqueue.h> | |
37 | ||
38 | #include <asm/irq.h> | |
39 | #include <asm/arch/usb.h> | |
40 | ||
41 | ||
42 | #ifndef DEBUG | |
43 | #undef VERBOSE | |
44 | #endif | |
45 | ||
46 | ||
47 | #define DRIVER_VERSION "24 August 2004" | |
48 | #define DRIVER_NAME (isp1301_driver.name) | |
49 | ||
50 | MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | struct isp1301 { | |
54 | struct otg_transceiver otg; | |
55 | struct i2c_client client; | |
56 | void (*i2c_release)(struct device *dev); | |
57 | ||
58 | int irq; | |
59 | ||
60 | u32 last_otg_ctrl; | |
61 | unsigned working:1; | |
62 | ||
63 | struct timer_list timer; | |
64 | ||
65 | /* use keventd context to change the state for us */ | |
66 | struct work_struct work; | |
67 | ||
68 | unsigned long todo; | |
69 | # define WORK_UPDATE_ISP 0 /* update ISP from OTG */ | |
70 | # define WORK_UPDATE_OTG 1 /* update OTG from ISP */ | |
71 | # define WORK_HOST_RESUME 4 /* resume host */ | |
72 | # define WORK_TIMER 6 /* timer fired */ | |
73 | # define WORK_STOP 7 /* don't resubmit */ | |
74 | }; | |
75 | ||
76 | ||
77 | /* bits in OTG_CTRL_REG */ | |
78 | ||
79 | #define OTG_XCEIV_OUTPUTS \ | |
80 | (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) | |
81 | #define OTG_XCEIV_INPUTS \ | |
82 | (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) | |
83 | #define OTG_CTRL_BITS \ | |
84 | (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) | |
85 | /* and OTG_PULLUP is sometimes written */ | |
86 | ||
87 | #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ | |
88 | OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ | |
89 | OTG_CTRL_BITS) | |
90 | ||
91 | ||
92 | /*-------------------------------------------------------------------------*/ | |
93 | ||
94 | #ifdef CONFIG_MACH_OMAP_H2 | |
95 | ||
96 | /* board-specific PM hooks */ | |
97 | ||
98 | #include <asm/arch/gpio.h> | |
99 | #include <asm/arch/mux.h> | |
100 | #include <asm/mach-types.h> | |
101 | ||
102 | ||
103 | #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE) | |
104 | ||
105 | #include <asm/arch/tps65010.h> | |
106 | ||
107 | #else | |
108 | ||
109 | static inline int tps65010_set_vbus_draw(unsigned mA) | |
110 | { | |
111 | pr_debug("tps65010: draw %d mA (STUB)\n", mA); | |
112 | return 0; | |
113 | } | |
114 | ||
115 | #endif | |
116 | ||
117 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
118 | { | |
119 | int status = tps65010_set_vbus_draw(mA); | |
120 | if (status < 0) | |
121 | pr_debug(" VBUS %d mA error %d\n", mA, status); | |
122 | } | |
123 | ||
124 | static void enable_vbus_source(struct isp1301 *isp) | |
125 | { | |
126 | /* this board won't supply more than 8mA vbus power. | |
127 | * some boards can switch a 100ma "unit load" (or more). | |
128 | */ | |
129 | } | |
130 | ||
131 | ||
132 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
133 | static inline void notresponding(struct isp1301 *isp) | |
134 | { | |
135 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
136 | } | |
137 | ||
138 | ||
139 | #endif | |
140 | ||
141 | /*-------------------------------------------------------------------------*/ | |
142 | ||
143 | /* only two addresses possible */ | |
144 | #define ISP_BASE 0x2c | |
145 | static unsigned short normal_i2c[] = { | |
146 | ISP_BASE, ISP_BASE + 1, | |
147 | I2C_CLIENT_END }; | |
1da177e4 LT |
148 | |
149 | I2C_CLIENT_INSMOD; | |
150 | ||
151 | static struct i2c_driver isp1301_driver; | |
152 | ||
153 | /* smbus apis are used for portability */ | |
154 | ||
155 | static inline u8 | |
156 | isp1301_get_u8(struct isp1301 *isp, u8 reg) | |
157 | { | |
158 | return i2c_smbus_read_byte_data(&isp->client, reg + 0); | |
159 | } | |
160 | ||
161 | static inline int | |
162 | isp1301_get_u16(struct isp1301 *isp, u8 reg) | |
163 | { | |
164 | return i2c_smbus_read_word_data(&isp->client, reg); | |
165 | } | |
166 | ||
167 | static inline int | |
168 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
169 | { | |
170 | return i2c_smbus_write_byte_data(&isp->client, reg + 0, bits); | |
171 | } | |
172 | ||
173 | static inline int | |
174 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
175 | { | |
176 | return i2c_smbus_write_byte_data(&isp->client, reg + 1, bits); | |
177 | } | |
178 | ||
179 | /*-------------------------------------------------------------------------*/ | |
180 | ||
181 | /* identification */ | |
182 | #define ISP1301_VENDOR_ID 0x00 /* u16 read */ | |
183 | #define ISP1301_PRODUCT_ID 0x02 /* u16 read */ | |
184 | #define ISP1301_BCD_DEVICE 0x14 /* u16 read */ | |
185 | ||
186 | #define I2C_VENDOR_ID_PHILIPS 0x04cc | |
187 | #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 | |
188 | ||
189 | /* operational registers */ | |
190 | #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ | |
191 | # define MC1_SPEED_REG (1 << 0) | |
192 | # define MC1_SUSPEND_REG (1 << 1) | |
193 | # define MC1_DAT_SE0 (1 << 2) | |
194 | # define MC1_TRANSPARENT (1 << 3) | |
195 | # define MC1_BDIS_ACON_EN (1 << 4) | |
196 | # define MC1_OE_INT_EN (1 << 5) | |
197 | # define MC1_UART_EN (1 << 6) | |
198 | # define MC1_MASK 0x7f | |
199 | #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ | |
200 | # define MC2_GLOBAL_PWR_DN (1 << 0) | |
201 | # define MC2_SPD_SUSP_CTRL (1 << 1) | |
202 | # define MC2_BI_DI (1 << 2) | |
203 | # define MC2_TRANSP_BDIR0 (1 << 3) | |
204 | # define MC2_TRANSP_BDIR1 (1 << 4) | |
205 | # define MC2_AUDIO_EN (1 << 5) | |
206 | # define MC2_PSW_EN (1 << 6) | |
207 | # define MC2_EN2V7 (1 << 7) | |
208 | #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ | |
209 | # define OTG1_DP_PULLUP (1 << 0) | |
210 | # define OTG1_DM_PULLUP (1 << 1) | |
211 | # define OTG1_DP_PULLDOWN (1 << 2) | |
212 | # define OTG1_DM_PULLDOWN (1 << 3) | |
213 | # define OTG1_ID_PULLDOWN (1 << 4) | |
214 | # define OTG1_VBUS_DRV (1 << 5) | |
215 | # define OTG1_VBUS_DISCHRG (1 << 6) | |
216 | # define OTG1_VBUS_CHRG (1 << 7) | |
217 | #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ | |
218 | # define OTG_B_SESS_END (1 << 6) | |
219 | # define OTG_B_SESS_VLD (1 << 7) | |
220 | ||
221 | #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ | |
222 | #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ | |
223 | ||
224 | #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ | |
225 | #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ | |
226 | ||
227 | /* same bitfields in all interrupt registers */ | |
228 | # define INTR_VBUS_VLD (1 << 0) | |
229 | # define INTR_SESS_VLD (1 << 1) | |
230 | # define INTR_DP_HI (1 << 2) | |
231 | # define INTR_ID_GND (1 << 3) | |
232 | # define INTR_DM_HI (1 << 4) | |
233 | # define INTR_ID_FLOAT (1 << 5) | |
234 | # define INTR_BDIS_ACON (1 << 6) | |
235 | # define INTR_CR_INT (1 << 7) | |
236 | ||
237 | /*-------------------------------------------------------------------------*/ | |
238 | ||
239 | static const char *state_string(enum usb_otg_state state) | |
240 | { | |
241 | switch (state) { | |
242 | case OTG_STATE_A_IDLE: return "a_idle"; | |
243 | case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; | |
244 | case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; | |
245 | case OTG_STATE_A_HOST: return "a_host"; | |
246 | case OTG_STATE_A_SUSPEND: return "a_suspend"; | |
247 | case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; | |
248 | case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; | |
249 | case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; | |
250 | case OTG_STATE_B_IDLE: return "b_idle"; | |
251 | case OTG_STATE_B_SRP_INIT: return "b_srp_init"; | |
252 | case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; | |
253 | case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; | |
254 | case OTG_STATE_B_HOST: return "b_host"; | |
255 | default: return "UNDEFINED"; | |
256 | } | |
257 | } | |
258 | ||
259 | static inline const char *state_name(struct isp1301 *isp) | |
260 | { | |
261 | return state_string(isp->otg.state); | |
262 | } | |
263 | ||
264 | #ifdef VERBOSE | |
265 | #define dev_vdbg dev_dbg | |
266 | #else | |
267 | #define dev_vdbg(dev, fmt, arg...) do{}while(0) | |
268 | #endif | |
269 | ||
270 | /*-------------------------------------------------------------------------*/ | |
271 | ||
272 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; | |
273 | * not everything is guarded by board-specific checks, or even using | |
274 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. | |
275 | * | |
276 | * ALSO: this currently doesn't use ISP1301 low-power modes | |
277 | * while OTG is running. | |
278 | */ | |
279 | ||
280 | static void power_down(struct isp1301 *isp) | |
281 | { | |
282 | isp->otg.state = OTG_STATE_UNDEFINED; | |
283 | ||
284 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
285 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG); | |
286 | ||
287 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); | |
288 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
289 | } | |
290 | ||
291 | static void power_up(struct isp1301 *isp) | |
292 | { | |
293 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
294 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG); | |
295 | ||
296 | /* do this only when cpu is driving transceiver, | |
297 | * so host won't see a low speed device... | |
298 | */ | |
299 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
300 | } | |
301 | ||
302 | #define NO_HOST_SUSPEND | |
303 | ||
304 | static int host_suspend(struct isp1301 *isp) | |
305 | { | |
306 | #ifdef NO_HOST_SUSPEND | |
307 | return 0; | |
308 | #else | |
309 | struct device *dev; | |
310 | ||
311 | if (!isp->otg.host) | |
312 | return -ENODEV; | |
313 | ||
314 | /* Currently ASSUMES only the OTG port matters; | |
315 | * other ports could be active... | |
316 | */ | |
317 | dev = isp->otg.host->controller; | |
318 | return dev->driver->suspend(dev, 3, 0); | |
319 | #endif | |
320 | } | |
321 | ||
322 | static int host_resume(struct isp1301 *isp) | |
323 | { | |
324 | #ifdef NO_HOST_SUSPEND | |
325 | return 0; | |
326 | #else | |
327 | struct device *dev; | |
328 | ||
329 | if (!isp->otg.host) | |
330 | return -ENODEV; | |
331 | ||
332 | dev = isp->otg.host->controller; | |
333 | return dev->driver->resume(dev, 0); | |
334 | #endif | |
335 | } | |
336 | ||
337 | static int gadget_suspend(struct isp1301 *isp) | |
338 | { | |
339 | isp->otg.gadget->b_hnp_enable = 0; | |
340 | isp->otg.gadget->a_hnp_support = 0; | |
341 | isp->otg.gadget->a_alt_hnp_support = 0; | |
342 | return usb_gadget_vbus_disconnect(isp->otg.gadget); | |
343 | } | |
344 | ||
345 | /*-------------------------------------------------------------------------*/ | |
346 | ||
347 | #define TIMER_MINUTES 10 | |
348 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) | |
349 | ||
350 | /* Almost all our I2C messaging comes from a work queue's task context. | |
351 | * NOTE: guaranteeing certain response times might mean we shouldn't | |
352 | * share keventd's work queue; a realtime task might be safest. | |
353 | */ | |
354 | void | |
355 | isp1301_defer_work(struct isp1301 *isp, int work) | |
356 | { | |
357 | int status; | |
358 | ||
359 | if (isp && !test_and_set_bit(work, &isp->todo)) { | |
360 | (void) get_device(&isp->client.dev); | |
361 | status = schedule_work(&isp->work); | |
362 | if (!status && !isp->working) | |
363 | dev_vdbg(&isp->client.dev, | |
364 | "work item %d may be lost\n", work); | |
365 | } | |
366 | } | |
367 | ||
368 | /* called from irq handlers */ | |
369 | static void a_idle(struct isp1301 *isp, const char *tag) | |
370 | { | |
371 | if (isp->otg.state == OTG_STATE_A_IDLE) | |
372 | return; | |
373 | ||
374 | isp->otg.default_a = 1; | |
375 | if (isp->otg.host) { | |
376 | isp->otg.host->is_b_host = 0; | |
377 | host_suspend(isp); | |
378 | } | |
379 | if (isp->otg.gadget) { | |
380 | isp->otg.gadget->is_a_peripheral = 1; | |
381 | gadget_suspend(isp); | |
382 | } | |
383 | isp->otg.state = OTG_STATE_A_IDLE; | |
384 | isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
385 | pr_debug(" --> %s/%s\n", state_name(isp), tag); | |
386 | } | |
387 | ||
388 | /* called from irq handlers */ | |
389 | static void b_idle(struct isp1301 *isp, const char *tag) | |
390 | { | |
391 | if (isp->otg.state == OTG_STATE_B_IDLE) | |
392 | return; | |
393 | ||
394 | isp->otg.default_a = 0; | |
395 | if (isp->otg.host) { | |
396 | isp->otg.host->is_b_host = 1; | |
397 | host_suspend(isp); | |
398 | } | |
399 | if (isp->otg.gadget) { | |
400 | isp->otg.gadget->is_a_peripheral = 0; | |
401 | gadget_suspend(isp); | |
402 | } | |
403 | isp->otg.state = OTG_STATE_B_IDLE; | |
404 | isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
405 | pr_debug(" --> %s/%s\n", state_name(isp), tag); | |
406 | } | |
407 | ||
408 | static void | |
409 | dump_regs(struct isp1301 *isp, const char *label) | |
410 | { | |
411 | #ifdef DEBUG | |
412 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); | |
413 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
414 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
415 | ||
416 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", | |
417 | OTG_CTRL_REG, label, state_name(isp), | |
418 | ctrl, status, src); | |
419 | /* mode control and irq enables don't change much */ | |
420 | #endif | |
421 | } | |
422 | ||
423 | /*-------------------------------------------------------------------------*/ | |
424 | ||
425 | #ifdef CONFIG_USB_OTG | |
426 | ||
427 | /* | |
428 | * The OMAP OTG controller handles most of the OTG state transitions. | |
429 | * | |
430 | * We translate isp1301 outputs (mostly voltage comparator status) into | |
431 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state | |
432 | * flags into isp1301 inputs ... and infer state transitions. | |
433 | */ | |
434 | ||
435 | #ifdef VERBOSE | |
436 | ||
437 | static void check_state(struct isp1301 *isp, const char *tag) | |
438 | { | |
439 | enum usb_otg_state state = OTG_STATE_UNDEFINED; | |
440 | u8 fsm = OTG_TEST_REG & 0x0ff; | |
441 | unsigned extra = 0; | |
442 | ||
443 | switch (fsm) { | |
444 | ||
445 | /* default-b */ | |
446 | case 0x0: | |
447 | state = OTG_STATE_B_IDLE; | |
448 | break; | |
449 | case 0x3: | |
450 | case 0x7: | |
451 | extra = 1; | |
452 | case 0x1: | |
453 | state = OTG_STATE_B_PERIPHERAL; | |
454 | break; | |
455 | case 0x11: | |
456 | state = OTG_STATE_B_SRP_INIT; | |
457 | break; | |
458 | ||
459 | /* extra dual-role default-b states */ | |
460 | case 0x12: | |
461 | case 0x13: | |
462 | case 0x16: | |
463 | extra = 1; | |
464 | case 0x17: | |
465 | state = OTG_STATE_B_WAIT_ACON; | |
466 | break; | |
467 | case 0x34: | |
468 | state = OTG_STATE_B_HOST; | |
469 | break; | |
470 | ||
471 | /* default-a */ | |
472 | case 0x36: | |
473 | state = OTG_STATE_A_IDLE; | |
474 | break; | |
475 | case 0x3c: | |
476 | state = OTG_STATE_A_WAIT_VFALL; | |
477 | break; | |
478 | case 0x7d: | |
479 | state = OTG_STATE_A_VBUS_ERR; | |
480 | break; | |
481 | case 0x9e: | |
482 | case 0x9f: | |
483 | extra = 1; | |
484 | case 0x89: | |
485 | state = OTG_STATE_A_PERIPHERAL; | |
486 | break; | |
487 | case 0xb7: | |
488 | state = OTG_STATE_A_WAIT_VRISE; | |
489 | break; | |
490 | case 0xb8: | |
491 | state = OTG_STATE_A_WAIT_BCON; | |
492 | break; | |
493 | case 0xb9: | |
494 | state = OTG_STATE_A_HOST; | |
495 | break; | |
496 | case 0xba: | |
497 | state = OTG_STATE_A_SUSPEND; | |
498 | break; | |
499 | default: | |
500 | break; | |
501 | } | |
502 | if (isp->otg.state == state && !extra) | |
503 | return; | |
504 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, | |
505 | state_string(state), fsm, state_name(isp), OTG_CTRL_REG); | |
506 | } | |
507 | ||
508 | #else | |
509 | ||
510 | static inline void check_state(struct isp1301 *isp, const char *tag) { } | |
511 | ||
512 | #endif | |
513 | ||
514 | /* outputs from ISP1301_INTERRUPT_SOURCE */ | |
515 | static void update_otg1(struct isp1301 *isp, u8 int_src) | |
516 | { | |
517 | u32 otg_ctrl; | |
518 | ||
519 | otg_ctrl = OTG_CTRL_REG | |
520 | & OTG_CTRL_MASK | |
521 | & ~OTG_XCEIV_INPUTS | |
522 | & ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); | |
523 | if (int_src & INTR_SESS_VLD) | |
524 | otg_ctrl |= OTG_ASESSVLD; | |
525 | else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) { | |
526 | a_idle(isp, "vfall"); | |
527 | otg_ctrl &= ~OTG_CTRL_BITS; | |
528 | } | |
529 | if (int_src & INTR_VBUS_VLD) | |
530 | otg_ctrl |= OTG_VBUSVLD; | |
531 | if (int_src & INTR_ID_GND) { /* default-A */ | |
532 | if (isp->otg.state == OTG_STATE_B_IDLE | |
533 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
534 | a_idle(isp, "init"); | |
535 | return; | |
536 | } | |
537 | } else { /* default-B */ | |
538 | otg_ctrl |= OTG_ID; | |
539 | if (isp->otg.state == OTG_STATE_A_IDLE | |
540 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
541 | b_idle(isp, "init"); | |
542 | return; | |
543 | } | |
544 | } | |
545 | OTG_CTRL_REG = otg_ctrl; | |
546 | } | |
547 | ||
548 | /* outputs from ISP1301_OTG_STATUS */ | |
549 | static void update_otg2(struct isp1301 *isp, u8 otg_status) | |
550 | { | |
551 | u32 otg_ctrl; | |
552 | ||
553 | otg_ctrl = OTG_CTRL_REG | |
554 | & OTG_CTRL_MASK | |
555 | & ~OTG_XCEIV_INPUTS | |
556 | & ~(OTG_BSESSVLD|OTG_BSESSEND); | |
557 | if (otg_status & OTG_B_SESS_VLD) | |
558 | otg_ctrl |= OTG_BSESSVLD; | |
559 | else if (otg_status & OTG_B_SESS_END) | |
560 | otg_ctrl |= OTG_BSESSEND; | |
561 | OTG_CTRL_REG = otg_ctrl; | |
562 | } | |
563 | ||
564 | /* inputs going to ISP1301 */ | |
565 | static void otg_update_isp(struct isp1301 *isp) | |
566 | { | |
567 | u32 otg_ctrl, otg_change; | |
568 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; | |
569 | ||
570 | otg_ctrl = OTG_CTRL_REG; | |
571 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; | |
572 | isp->last_otg_ctrl = otg_ctrl; | |
573 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; | |
574 | ||
575 | switch (isp->otg.state) { | |
576 | case OTG_STATE_B_IDLE: | |
577 | case OTG_STATE_B_PERIPHERAL: | |
578 | case OTG_STATE_B_SRP_INIT: | |
579 | if (!(otg_ctrl & OTG_PULLUP)) { | |
580 | // if (otg_ctrl & OTG_B_HNPEN) { | |
581 | if (isp->otg.gadget->b_hnp_enable) { | |
582 | isp->otg.state = OTG_STATE_B_WAIT_ACON; | |
583 | pr_debug(" --> b_wait_acon\n"); | |
584 | } | |
585 | goto pulldown; | |
586 | } | |
587 | pullup: | |
588 | set |= OTG1_DP_PULLUP; | |
589 | clr |= OTG1_DP_PULLDOWN; | |
590 | break; | |
591 | case OTG_STATE_A_SUSPEND: | |
592 | case OTG_STATE_A_PERIPHERAL: | |
593 | if (otg_ctrl & OTG_PULLUP) | |
594 | goto pullup; | |
595 | /* FALLTHROUGH */ | |
596 | // case OTG_STATE_B_WAIT_ACON: | |
597 | default: | |
598 | pulldown: | |
599 | set |= OTG1_DP_PULLDOWN; | |
600 | clr |= OTG1_DP_PULLUP; | |
601 | break; | |
602 | } | |
603 | ||
604 | # define toggle(OTG,ISP) do { \ | |
605 | if (otg_ctrl & OTG) set |= ISP; \ | |
606 | else clr |= ISP; \ | |
607 | } while (0) | |
608 | ||
609 | if (!(isp->otg.host)) | |
610 | otg_ctrl &= ~OTG_DRV_VBUS; | |
611 | ||
612 | switch (isp->otg.state) { | |
613 | case OTG_STATE_A_SUSPEND: | |
614 | if (otg_ctrl & OTG_DRV_VBUS) { | |
615 | set |= OTG1_VBUS_DRV; | |
616 | break; | |
617 | } | |
618 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ | |
619 | notresponding(isp); | |
620 | ||
621 | /* FALLTHROUGH */ | |
622 | case OTG_STATE_A_VBUS_ERR: | |
623 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
624 | pr_debug(" --> a_wait_vfall\n"); | |
625 | /* FALLTHROUGH */ | |
626 | case OTG_STATE_A_WAIT_VFALL: | |
627 | /* FIXME usbcore thinks port power is still on ... */ | |
628 | clr |= OTG1_VBUS_DRV; | |
629 | break; | |
630 | case OTG_STATE_A_IDLE: | |
631 | if (otg_ctrl & OTG_DRV_VBUS) { | |
632 | isp->otg.state = OTG_STATE_A_WAIT_VRISE; | |
633 | pr_debug(" --> a_wait_vrise\n"); | |
634 | } | |
635 | /* FALLTHROUGH */ | |
636 | default: | |
637 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); | |
638 | } | |
639 | ||
640 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); | |
641 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); | |
642 | ||
643 | # undef toggle | |
644 | ||
645 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); | |
646 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); | |
647 | ||
648 | /* HNP switch to host or peripheral; and SRP */ | |
649 | if (otg_change & OTG_PULLUP) { | |
650 | switch (isp->otg.state) { | |
651 | case OTG_STATE_B_IDLE: | |
652 | if (clr & OTG1_DP_PULLUP) | |
653 | break; | |
654 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
655 | pr_debug(" --> b_peripheral\n"); | |
656 | break; | |
657 | case OTG_STATE_A_SUSPEND: | |
658 | if (clr & OTG1_DP_PULLUP) | |
659 | break; | |
660 | isp->otg.state = OTG_STATE_A_PERIPHERAL; | |
661 | pr_debug(" --> a_peripheral\n"); | |
662 | break; | |
663 | default: | |
664 | break; | |
665 | } | |
666 | OTG_CTRL_REG |= OTG_PULLUP; | |
667 | } | |
668 | ||
669 | check_state(isp, __FUNCTION__); | |
670 | dump_regs(isp, "otg->isp1301"); | |
671 | } | |
672 | ||
673 | static irqreturn_t omap_otg_irq(int irq, void *_isp, struct pt_regs *regs) | |
674 | { | |
675 | u16 otg_irq = OTG_IRQ_SRC_REG; | |
676 | u32 otg_ctrl; | |
677 | int ret = IRQ_NONE; | |
678 | struct isp1301 *isp = _isp; | |
679 | ||
680 | /* update ISP1301 transciever from OTG controller */ | |
681 | if (otg_irq & OPRT_CHG) { | |
682 | OTG_IRQ_SRC_REG = OPRT_CHG; | |
683 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
684 | ret = IRQ_HANDLED; | |
685 | ||
686 | /* SRP to become b_peripheral failed */ | |
687 | } else if (otg_irq & B_SRP_TMROUT) { | |
688 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", OTG_CTRL_REG); | |
689 | notresponding(isp); | |
690 | ||
691 | /* gadget drivers that care should monitor all kinds of | |
692 | * remote wakeup (SRP, normal) using their own timer | |
693 | * to give "check cable and A-device" messages. | |
694 | */ | |
695 | if (isp->otg.state == OTG_STATE_B_SRP_INIT) | |
696 | b_idle(isp, "srp_timeout"); | |
697 | ||
698 | OTG_IRQ_SRC_REG = B_SRP_TMROUT; | |
699 | ret = IRQ_HANDLED; | |
700 | ||
701 | /* HNP to become b_host failed */ | |
702 | } else if (otg_irq & B_HNP_FAIL) { | |
703 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", | |
704 | state_name(isp), OTG_CTRL_REG); | |
705 | notresponding(isp); | |
706 | ||
707 | otg_ctrl = OTG_CTRL_REG; | |
708 | otg_ctrl |= OTG_BUSDROP; | |
709 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
710 | OTG_CTRL_REG = otg_ctrl; | |
711 | ||
712 | /* subset of b_peripheral()... */ | |
713 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
714 | pr_debug(" --> b_peripheral\n"); | |
715 | ||
716 | OTG_IRQ_SRC_REG = B_HNP_FAIL; | |
717 | ret = IRQ_HANDLED; | |
718 | ||
719 | /* detect SRP from B-device ... */ | |
720 | } else if (otg_irq & A_SRP_DETECT) { | |
721 | pr_debug("otg: %s SRP_DETECT, %06x\n", | |
722 | state_name(isp), OTG_CTRL_REG); | |
723 | ||
724 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
725 | switch (isp->otg.state) { | |
726 | case OTG_STATE_A_IDLE: | |
727 | if (!isp->otg.host) | |
728 | break; | |
729 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
730 | otg_ctrl = OTG_CTRL_REG; | |
731 | otg_ctrl |= OTG_A_BUSREQ; | |
732 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
733 | & ~OTG_XCEIV_INPUTS | |
734 | & OTG_CTRL_MASK; | |
735 | OTG_CTRL_REG = otg_ctrl; | |
736 | break; | |
737 | default: | |
738 | break; | |
739 | } | |
740 | ||
741 | OTG_IRQ_SRC_REG = A_SRP_DETECT; | |
742 | ret = IRQ_HANDLED; | |
743 | ||
744 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) | |
745 | * we don't track them separately | |
746 | */ | |
747 | } else if (otg_irq & A_REQ_TMROUT) { | |
748 | otg_ctrl = OTG_CTRL_REG; | |
749 | pr_info("otg: BCON_TMOUT from %s, %06x\n", | |
750 | state_name(isp), otg_ctrl); | |
751 | notresponding(isp); | |
752 | ||
753 | otg_ctrl |= OTG_BUSDROP; | |
754 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
755 | OTG_CTRL_REG = otg_ctrl; | |
756 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
757 | ||
758 | OTG_IRQ_SRC_REG = A_REQ_TMROUT; | |
759 | ret = IRQ_HANDLED; | |
760 | ||
761 | /* A-supplied voltage fell too low; overcurrent */ | |
762 | } else if (otg_irq & A_VBUS_ERR) { | |
763 | otg_ctrl = OTG_CTRL_REG; | |
764 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", | |
765 | state_name(isp), otg_irq, otg_ctrl); | |
766 | ||
767 | otg_ctrl |= OTG_BUSDROP; | |
768 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
769 | OTG_CTRL_REG = otg_ctrl; | |
770 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
771 | ||
772 | OTG_IRQ_SRC_REG = A_VBUS_ERR; | |
773 | ret = IRQ_HANDLED; | |
774 | ||
775 | /* switch driver; the transciever code activates it, | |
776 | * ungating the udc clock or resuming OHCI. | |
777 | */ | |
778 | } else if (otg_irq & DRIVER_SWITCH) { | |
779 | int kick = 0; | |
780 | ||
781 | otg_ctrl = OTG_CTRL_REG; | |
782 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", | |
783 | state_name(isp), | |
784 | (otg_ctrl & OTG_DRIVER_SEL) | |
785 | ? "gadget" : "host", | |
786 | otg_ctrl); | |
787 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
788 | ||
789 | /* role is peripheral */ | |
790 | if (otg_ctrl & OTG_DRIVER_SEL) { | |
791 | switch (isp->otg.state) { | |
792 | case OTG_STATE_A_IDLE: | |
793 | b_idle(isp, __FUNCTION__); | |
794 | break; | |
795 | default: | |
796 | break; | |
797 | } | |
798 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
799 | ||
800 | /* role is host */ | |
801 | } else { | |
802 | if (!(otg_ctrl & OTG_ID)) { | |
803 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
804 | OTG_CTRL_REG = otg_ctrl | OTG_A_BUSREQ; | |
805 | } | |
806 | ||
807 | if (isp->otg.host) { | |
808 | switch (isp->otg.state) { | |
809 | case OTG_STATE_B_WAIT_ACON: | |
810 | isp->otg.state = OTG_STATE_B_HOST; | |
811 | pr_debug(" --> b_host\n"); | |
812 | kick = 1; | |
813 | break; | |
814 | case OTG_STATE_A_WAIT_BCON: | |
815 | isp->otg.state = OTG_STATE_A_HOST; | |
816 | pr_debug(" --> a_host\n"); | |
817 | break; | |
818 | case OTG_STATE_A_PERIPHERAL: | |
819 | isp->otg.state = OTG_STATE_A_WAIT_BCON; | |
820 | pr_debug(" --> a_wait_bcon\n"); | |
821 | break; | |
822 | default: | |
823 | break; | |
824 | } | |
825 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
826 | } | |
827 | } | |
828 | ||
829 | OTG_IRQ_SRC_REG = DRIVER_SWITCH; | |
830 | ret = IRQ_HANDLED; | |
831 | ||
832 | if (kick) | |
833 | usb_bus_start_enum(isp->otg.host, | |
834 | isp->otg.host->otg_port); | |
835 | } | |
836 | ||
837 | check_state(isp, __FUNCTION__); | |
838 | return ret; | |
839 | } | |
840 | ||
841 | static struct platform_device *otg_dev; | |
842 | ||
843 | static int otg_init(struct isp1301 *isp) | |
844 | { | |
845 | if (!otg_dev) | |
846 | return -ENODEV; | |
847 | ||
848 | dump_regs(isp, __FUNCTION__); | |
849 | /* some of these values are board-specific... */ | |
850 | OTG_SYSCON_2_REG |= OTG_EN | |
851 | /* for B-device: */ | |
852 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ | |
853 | | SRP_GPDVBUS /* discharge after VBUS pulse */ | |
854 | // | (3 << 24) /* 2msec VBUS pulse */ | |
855 | /* for A-device: */ | |
856 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ | |
857 | | SRP_DPW /* detect 167+ns SRP pulses */ | |
858 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ | |
859 | ; | |
860 | ||
861 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
862 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
863 | ||
864 | check_state(isp, __FUNCTION__); | |
865 | pr_debug("otg: %s, %s %06x\n", | |
866 | state_name(isp), __FUNCTION__, OTG_CTRL_REG); | |
867 | ||
868 | OTG_IRQ_EN_REG = DRIVER_SWITCH | OPRT_CHG | |
869 | | B_SRP_TMROUT | B_HNP_FAIL | |
870 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT; | |
871 | OTG_SYSCON_2_REG |= OTG_EN; | |
872 | ||
873 | return 0; | |
874 | } | |
875 | ||
3ae5eaec | 876 | static int otg_probe(struct platform_device *dev) |
1da177e4 LT |
877 | { |
878 | // struct omap_usb_config *config = dev->platform_data; | |
879 | ||
3ae5eaec | 880 | otg_dev = dev; |
1da177e4 LT |
881 | return 0; |
882 | } | |
883 | ||
3ae5eaec | 884 | static int otg_remove(struct platform_device *dev) |
1da177e4 LT |
885 | { |
886 | otg_dev = 0; | |
887 | return 0; | |
888 | } | |
889 | ||
3ae5eaec | 890 | struct platform_driver omap_otg_driver = { |
1da177e4 | 891 | .probe = otg_probe, |
3ae5eaec RK |
892 | .remove = otg_remove, |
893 | .driver = { | |
894 | .owner = THIS_MODULE, | |
895 | .name = "omap_otg", | |
896 | }, | |
1da177e4 LT |
897 | }; |
898 | ||
899 | static int otg_bind(struct isp1301 *isp) | |
900 | { | |
901 | int status; | |
902 | ||
903 | if (otg_dev) | |
904 | return -EBUSY; | |
905 | ||
3ae5eaec | 906 | status = platform_driver_register(&omap_otg_driver); |
1da177e4 LT |
907 | if (status < 0) |
908 | return status; | |
909 | ||
910 | if (otg_dev) | |
911 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, | |
912 | SA_INTERRUPT, DRIVER_NAME, isp); | |
913 | else | |
914 | status = -ENODEV; | |
915 | ||
916 | if (status < 0) | |
3ae5eaec | 917 | platform_driver_unregister(&omap_otg_driver); |
1da177e4 LT |
918 | return status; |
919 | } | |
920 | ||
921 | static void otg_unbind(struct isp1301 *isp) | |
922 | { | |
923 | if (!otg_dev) | |
924 | return; | |
925 | free_irq(otg_dev->resource[1].start, isp); | |
926 | } | |
927 | ||
928 | #else | |
929 | ||
930 | /* OTG controller isn't clocked */ | |
931 | ||
932 | #endif /* CONFIG_USB_OTG */ | |
933 | ||
934 | /*-------------------------------------------------------------------------*/ | |
935 | ||
936 | static void b_peripheral(struct isp1301 *isp) | |
937 | { | |
938 | OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
939 | usb_gadget_vbus_connect(isp->otg.gadget); | |
940 | ||
941 | #ifdef CONFIG_USB_OTG | |
942 | enable_vbus_draw(isp, 8); | |
943 | otg_update_isp(isp); | |
944 | #else | |
945 | enable_vbus_draw(isp, 100); | |
946 | /* UDC driver just set OTG_BSESSVLD */ | |
947 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); | |
948 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); | |
949 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
950 | pr_debug(" --> b_peripheral\n"); | |
951 | dump_regs(isp, "2periph"); | |
952 | #endif | |
953 | } | |
954 | ||
955 | static void isp_update_otg(struct isp1301 *isp, u8 stat) | |
956 | { | |
957 | u8 isp_stat, isp_bstat; | |
958 | enum usb_otg_state state = isp->otg.state; | |
959 | ||
960 | if (stat & INTR_BDIS_ACON) | |
961 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); | |
962 | ||
963 | /* start certain state transitions right away */ | |
964 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
965 | if (isp_stat & INTR_ID_GND) { | |
966 | if (isp->otg.default_a) { | |
967 | switch (state) { | |
968 | case OTG_STATE_B_IDLE: | |
969 | a_idle(isp, "idle"); | |
970 | /* FALLTHROUGH */ | |
971 | case OTG_STATE_A_IDLE: | |
972 | enable_vbus_source(isp); | |
973 | /* FALLTHROUGH */ | |
974 | case OTG_STATE_A_WAIT_VRISE: | |
975 | /* we skip over OTG_STATE_A_WAIT_BCON, since | |
976 | * the HC will transition to A_HOST (or | |
977 | * A_SUSPEND!) without our noticing except | |
978 | * when HNP is used. | |
979 | */ | |
980 | if (isp_stat & INTR_VBUS_VLD) | |
981 | isp->otg.state = OTG_STATE_A_HOST; | |
982 | break; | |
983 | case OTG_STATE_A_WAIT_VFALL: | |
984 | if (!(isp_stat & INTR_SESS_VLD)) | |
985 | a_idle(isp, "vfell"); | |
986 | break; | |
987 | default: | |
988 | if (!(isp_stat & INTR_VBUS_VLD)) | |
989 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
990 | break; | |
991 | } | |
992 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
993 | } else { | |
994 | switch (state) { | |
995 | case OTG_STATE_B_PERIPHERAL: | |
996 | case OTG_STATE_B_HOST: | |
997 | case OTG_STATE_B_WAIT_ACON: | |
998 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
999 | break; | |
1000 | default: | |
1001 | break; | |
1002 | } | |
1003 | if (state != OTG_STATE_A_IDLE) | |
1004 | a_idle(isp, "id"); | |
1005 | if (isp->otg.host && state == OTG_STATE_A_IDLE) | |
1006 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
1007 | isp_bstat = 0; | |
1008 | } | |
1009 | } else { | |
1010 | /* if user unplugged mini-A end of cable, | |
1011 | * don't bypass A_WAIT_VFALL. | |
1012 | */ | |
1013 | if (isp->otg.default_a) { | |
1014 | switch (state) { | |
1015 | default: | |
1016 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
1017 | break; | |
1018 | case OTG_STATE_A_WAIT_VFALL: | |
1019 | state = OTG_STATE_A_IDLE; | |
1020 | /* khubd may take a while to notice and | |
1021 | * handle this disconnect, so don't go | |
1022 | * to B_IDLE quite yet. | |
1023 | */ | |
1024 | break; | |
1025 | case OTG_STATE_A_IDLE: | |
1026 | host_suspend(isp); | |
1027 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, | |
1028 | MC1_BDIS_ACON_EN); | |
1029 | isp->otg.state = OTG_STATE_B_IDLE; | |
1030 | OTG_CTRL_REG &= OTG_CTRL_REG & OTG_CTRL_MASK | |
1031 | & ~OTG_CTRL_BITS; | |
1032 | break; | |
1033 | case OTG_STATE_B_IDLE: | |
1034 | break; | |
1035 | } | |
1036 | } | |
1037 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1038 | ||
1039 | switch (isp->otg.state) { | |
1040 | case OTG_STATE_B_PERIPHERAL: | |
1041 | case OTG_STATE_B_WAIT_ACON: | |
1042 | case OTG_STATE_B_HOST: | |
1043 | if (likely(isp_bstat & OTG_B_SESS_VLD)) | |
1044 | break; | |
1045 | enable_vbus_draw(isp, 0); | |
1046 | #ifndef CONFIG_USB_OTG | |
1047 | /* UDC driver will clear OTG_BSESSVLD */ | |
1048 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1049 | OTG1_DP_PULLDOWN); | |
1050 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1051 | OTG1_DP_PULLUP); | |
1052 | dump_regs(isp, __FUNCTION__); | |
1053 | #endif | |
1054 | /* FALLTHROUGH */ | |
1055 | case OTG_STATE_B_SRP_INIT: | |
1056 | b_idle(isp, __FUNCTION__); | |
1057 | OTG_CTRL_REG &= OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
1058 | /* FALLTHROUGH */ | |
1059 | case OTG_STATE_B_IDLE: | |
1060 | if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) { | |
1061 | #ifdef CONFIG_USB_OTG | |
1062 | update_otg1(isp, isp_stat); | |
1063 | update_otg2(isp, isp_bstat); | |
1064 | #endif | |
1065 | b_peripheral(isp); | |
1066 | } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) | |
1067 | isp_bstat |= OTG_B_SESS_END; | |
1068 | break; | |
1069 | case OTG_STATE_A_WAIT_VFALL: | |
1070 | break; | |
1071 | default: | |
1072 | pr_debug("otg: unsupported b-device %s\n", | |
1073 | state_name(isp)); | |
1074 | break; | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | if (state != isp->otg.state) | |
1079 | pr_debug(" isp, %s -> %s\n", | |
1080 | state_string(state), state_name(isp)); | |
1081 | ||
1082 | #ifdef CONFIG_USB_OTG | |
1083 | /* update the OTG controller state to match the isp1301; may | |
1084 | * trigger OPRT_CHG irqs for changes going to the isp1301. | |
1085 | */ | |
1086 | update_otg1(isp, isp_stat); | |
1087 | update_otg2(isp, isp_bstat); | |
1088 | check_state(isp, __FUNCTION__); | |
1089 | #endif | |
1090 | ||
1091 | dump_regs(isp, "isp1301->otg"); | |
1092 | } | |
1093 | ||
1094 | /*-------------------------------------------------------------------------*/ | |
1095 | ||
1096 | static u8 isp1301_clear_latch(struct isp1301 *isp) | |
1097 | { | |
1098 | u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); | |
1099 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); | |
1100 | return latch; | |
1101 | } | |
1102 | ||
1103 | static void | |
1104 | isp1301_work(void *data) | |
1105 | { | |
1106 | struct isp1301 *isp = data; | |
1107 | int stop; | |
1108 | ||
1109 | /* implicit lock: we're the only task using this device */ | |
1110 | isp->working = 1; | |
1111 | do { | |
1112 | stop = test_bit(WORK_STOP, &isp->todo); | |
1113 | ||
1114 | #ifdef CONFIG_USB_OTG | |
1115 | /* transfer state from otg engine to isp1301 */ | |
1116 | if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { | |
1117 | otg_update_isp(isp); | |
1118 | put_device(&isp->client.dev); | |
1119 | } | |
1120 | #endif | |
1121 | /* transfer state from isp1301 to otg engine */ | |
1122 | if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { | |
1123 | u8 stat = isp1301_clear_latch(isp); | |
1124 | ||
1125 | isp_update_otg(isp, stat); | |
1126 | put_device(&isp->client.dev); | |
1127 | } | |
1128 | ||
1129 | if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { | |
1130 | u32 otg_ctrl; | |
1131 | ||
1132 | /* | |
1133 | * skip A_WAIT_VRISE; hc transitions invisibly | |
1134 | * skip A_WAIT_BCON; same. | |
1135 | */ | |
1136 | switch (isp->otg.state) { | |
1137 | case OTG_STATE_A_WAIT_BCON: | |
1138 | case OTG_STATE_A_WAIT_VRISE: | |
1139 | isp->otg.state = OTG_STATE_A_HOST; | |
1140 | pr_debug(" --> a_host\n"); | |
1141 | otg_ctrl = OTG_CTRL_REG; | |
1142 | otg_ctrl |= OTG_A_BUSREQ; | |
1143 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
1144 | & OTG_CTRL_MASK; | |
1145 | OTG_CTRL_REG = otg_ctrl; | |
1146 | break; | |
1147 | case OTG_STATE_B_WAIT_ACON: | |
1148 | isp->otg.state = OTG_STATE_B_HOST; | |
1149 | pr_debug(" --> b_host (acon)\n"); | |
1150 | break; | |
1151 | case OTG_STATE_B_HOST: | |
1152 | case OTG_STATE_B_IDLE: | |
1153 | case OTG_STATE_A_IDLE: | |
1154 | break; | |
1155 | default: | |
1156 | pr_debug(" host resume in %s\n", | |
1157 | state_name(isp)); | |
1158 | } | |
1159 | host_resume(isp); | |
1160 | // mdelay(10); | |
1161 | put_device(&isp->client.dev); | |
1162 | } | |
1163 | ||
1164 | if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { | |
1165 | #ifdef VERBOSE | |
1166 | dump_regs(isp, "timer"); | |
1167 | if (!stop) | |
1168 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1169 | #endif | |
1170 | put_device(&isp->client.dev); | |
1171 | } | |
1172 | ||
1173 | if (isp->todo) | |
1174 | dev_vdbg(&isp->client.dev, | |
1175 | "work done, todo = 0x%lx\n", | |
1176 | isp->todo); | |
1177 | if (stop) { | |
1178 | dev_dbg(&isp->client.dev, "stop\n"); | |
1179 | break; | |
1180 | } | |
1181 | } while (isp->todo); | |
1182 | isp->working = 0; | |
1183 | } | |
1184 | ||
1185 | static irqreturn_t isp1301_irq(int irq, void *isp, struct pt_regs *regs) | |
1186 | { | |
1187 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
1188 | return IRQ_HANDLED; | |
1189 | } | |
1190 | ||
1191 | static void isp1301_timer(unsigned long _isp) | |
1192 | { | |
1193 | isp1301_defer_work((void *)_isp, WORK_TIMER); | |
1194 | } | |
1195 | ||
1196 | /*-------------------------------------------------------------------------*/ | |
1197 | ||
1198 | static void isp1301_release(struct device *dev) | |
1199 | { | |
1200 | struct isp1301 *isp; | |
1201 | ||
1202 | isp = container_of(dev, struct isp1301, client.dev); | |
1203 | ||
1204 | /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ | |
1205 | if (isp->i2c_release) | |
1206 | isp->i2c_release(dev); | |
1207 | kfree (isp); | |
1208 | } | |
1209 | ||
1210 | static struct isp1301 *the_transceiver; | |
1211 | ||
1212 | static int isp1301_detach_client(struct i2c_client *i2c) | |
1213 | { | |
1214 | struct isp1301 *isp; | |
1215 | ||
1216 | isp = container_of(i2c, struct isp1301, client); | |
1217 | ||
1218 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1219 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1220 | free_irq(isp->irq, isp); | |
1221 | #ifdef CONFIG_USB_OTG | |
1222 | otg_unbind(isp); | |
1223 | #endif | |
1224 | if (machine_is_omap_h2()) | |
1225 | omap_free_gpio(2); | |
1226 | ||
1227 | isp->timer.data = 0; | |
1228 | set_bit(WORK_STOP, &isp->todo); | |
1229 | del_timer_sync(&isp->timer); | |
1230 | flush_scheduled_work(); | |
1231 | ||
1232 | put_device(&i2c->dev); | |
1233 | the_transceiver = 0; | |
1234 | ||
1235 | return i2c_detach_client(i2c); | |
1236 | } | |
1237 | ||
1238 | /*-------------------------------------------------------------------------*/ | |
1239 | ||
1240 | /* NOTE: three modes are possible here, only one of which | |
1241 | * will be standards-conformant on any given system: | |
1242 | * | |
1243 | * - OTG mode (dual-role), required if there's a Mini-AB connector | |
1244 | * - HOST mode, for when there's one or more A (host) connectors | |
1245 | * - DEVICE mode, for when there's a B/Mini-B (device) connector | |
1246 | * | |
1247 | * As a rule, you won't have an isp1301 chip unless it's there to | |
1248 | * support the OTG mode. Other modes help testing USB controllers | |
1249 | * in isolation from (full) OTG support, or maybe so later board | |
1250 | * revisions can help to support those feature. | |
1251 | */ | |
1252 | ||
1253 | #ifdef CONFIG_USB_OTG | |
1254 | ||
1255 | static int isp1301_otg_enable(struct isp1301 *isp) | |
1256 | { | |
1257 | power_up(isp); | |
1258 | otg_init(isp); | |
1259 | ||
1260 | /* NOTE: since we don't change this, this provides | |
1261 | * a few more interrupts than are strictly needed. | |
1262 | */ | |
1263 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
1264 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); | |
1265 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, | |
1266 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); | |
1267 | ||
1268 | dev_info(&isp->client.dev, "ready for dual-role USB ...\n"); | |
1269 | ||
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | #endif | |
1274 | ||
1275 | /* add or disable the host device+driver */ | |
1276 | static int | |
1277 | isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host) | |
1278 | { | |
1279 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
1280 | ||
1281 | if (!otg || isp != the_transceiver) | |
1282 | return -ENODEV; | |
1283 | ||
1284 | if (!host) { | |
1285 | OTG_IRQ_EN_REG = 0; | |
1286 | power_down(isp); | |
1287 | isp->otg.host = 0; | |
1288 | return 0; | |
1289 | } | |
1290 | ||
1291 | #ifdef CONFIG_USB_OTG | |
1292 | isp->otg.host = host; | |
1293 | dev_dbg(&isp->client.dev, "registered host\n"); | |
1294 | host_suspend(isp); | |
1295 | if (isp->otg.gadget) | |
1296 | return isp1301_otg_enable(isp); | |
1297 | return 0; | |
1298 | ||
1299 | #elif !defined(CONFIG_USB_GADGET_OMAP) | |
1300 | // FIXME update its refcount | |
1301 | isp->otg.host = host; | |
1302 | ||
1303 | power_up(isp); | |
1304 | ||
1305 | if (machine_is_omap_h2()) | |
1306 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1307 | ||
1308 | dev_info(&isp->client.dev, "A-Host sessions ok\n"); | |
1309 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
1310 | INTR_ID_GND); | |
1311 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, | |
1312 | INTR_ID_GND); | |
1313 | ||
1314 | /* If this has a Mini-AB connector, this mode is highly | |
1315 | * nonstandard ... but can be handy for testing, especially with | |
1316 | * the Mini-A end of an OTG cable. (Or something nonstandard | |
1317 | * like MiniB-to-StandardB, maybe built with a gender mender.) | |
1318 | */ | |
1319 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); | |
1320 | ||
1321 | dump_regs(isp, __FUNCTION__); | |
1322 | ||
1323 | return 0; | |
1324 | ||
1325 | #else | |
1326 | dev_dbg(&isp->client.dev, "host sessions not allowed\n"); | |
1327 | return -EINVAL; | |
1328 | #endif | |
1329 | ||
1330 | } | |
1331 | ||
1332 | static int | |
1333 | isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) | |
1334 | { | |
1335 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
1336 | ||
1337 | if (!otg || isp != the_transceiver) | |
1338 | return -ENODEV; | |
1339 | ||
1340 | if (!gadget) { | |
1341 | OTG_IRQ_EN_REG = 0; | |
1342 | if (!isp->otg.default_a) | |
1343 | enable_vbus_draw(isp, 0); | |
1344 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
1345 | isp->otg.gadget = 0; | |
1346 | power_down(isp); | |
1347 | return 0; | |
1348 | } | |
1349 | ||
1350 | #ifdef CONFIG_USB_OTG | |
1351 | isp->otg.gadget = gadget; | |
1352 | dev_dbg(&isp->client.dev, "registered gadget\n"); | |
1353 | /* gadget driver may be suspended until vbus_connect () */ | |
1354 | if (isp->otg.host) | |
1355 | return isp1301_otg_enable(isp); | |
1356 | return 0; | |
1357 | ||
1358 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) | |
1359 | isp->otg.gadget = gadget; | |
1360 | // FIXME update its refcount | |
1361 | ||
1362 | OTG_CTRL_REG = (OTG_CTRL_REG & OTG_CTRL_MASK | |
1363 | & ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS)) | |
1364 | | OTG_ID; | |
1365 | power_up(isp); | |
1366 | isp->otg.state = OTG_STATE_B_IDLE; | |
1367 | ||
1368 | if (machine_is_omap_h2()) | |
1369 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1370 | ||
1371 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
1372 | INTR_SESS_VLD); | |
1373 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, | |
1374 | INTR_VBUS_VLD); | |
1375 | dev_info(&isp->client.dev, "B-Peripheral sessions ok\n"); | |
1376 | dump_regs(isp, __FUNCTION__); | |
1377 | ||
1378 | /* If this has a Mini-AB connector, this mode is highly | |
1379 | * nonstandard ... but can be handy for testing, so long | |
1380 | * as you don't plug a Mini-A cable into the jack. | |
1381 | */ | |
1382 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) | |
1383 | b_peripheral(isp); | |
1384 | ||
1385 | return 0; | |
1386 | ||
1387 | #else | |
1388 | dev_dbg(&isp->client.dev, "peripheral sessions not allowed\n"); | |
1389 | return -EINVAL; | |
1390 | #endif | |
1391 | } | |
1392 | ||
1393 | ||
1394 | /*-------------------------------------------------------------------------*/ | |
1395 | ||
1396 | static int | |
1397 | isp1301_set_power(struct otg_transceiver *dev, unsigned mA) | |
1398 | { | |
1399 | if (!the_transceiver) | |
1400 | return -ENODEV; | |
1401 | if (dev->state == OTG_STATE_B_PERIPHERAL) | |
1402 | enable_vbus_draw(the_transceiver, mA); | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | static int | |
1407 | isp1301_start_srp(struct otg_transceiver *dev) | |
1408 | { | |
1409 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1410 | u32 otg_ctrl; | |
1411 | ||
1412 | if (!dev || isp != the_transceiver | |
1413 | || isp->otg.state != OTG_STATE_B_IDLE) | |
1414 | return -ENODEV; | |
1415 | ||
1416 | otg_ctrl = OTG_CTRL_REG; | |
1417 | if (!(otg_ctrl & OTG_BSESSEND)) | |
1418 | return -EINVAL; | |
1419 | ||
1420 | otg_ctrl |= OTG_B_BUSREQ; | |
1421 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; | |
1422 | OTG_CTRL_REG = otg_ctrl; | |
1423 | isp->otg.state = OTG_STATE_B_SRP_INIT; | |
1424 | ||
1425 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), OTG_CTRL_REG); | |
1426 | #ifdef CONFIG_USB_OTG | |
1427 | check_state(isp, __FUNCTION__); | |
1428 | #endif | |
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | static int | |
1433 | isp1301_start_hnp(struct otg_transceiver *dev) | |
1434 | { | |
1435 | #ifdef CONFIG_USB_OTG | |
1436 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1437 | ||
1438 | if (!dev || isp != the_transceiver) | |
1439 | return -ENODEV; | |
1440 | if (isp->otg.default_a && (isp->otg.host == NULL | |
1441 | || !isp->otg.host->b_hnp_enable)) | |
1442 | return -ENOTCONN; | |
1443 | if (!isp->otg.default_a && (isp->otg.gadget == NULL | |
1444 | || !isp->otg.gadget->b_hnp_enable)) | |
1445 | return -ENOTCONN; | |
1446 | ||
1447 | /* We want hardware to manage most HNP protocol timings. | |
1448 | * So do this part as early as possible... | |
1449 | */ | |
1450 | switch (isp->otg.state) { | |
1451 | case OTG_STATE_B_HOST: | |
1452 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
1453 | /* caller will suspend next */ | |
1454 | break; | |
1455 | case OTG_STATE_A_HOST: | |
1456 | #if 0 | |
1457 | /* autoconnect mode avoids irq latency bugs */ | |
1458 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1459 | MC1_BDIS_ACON_EN); | |
1460 | #endif | |
1461 | /* caller must suspend then clear A_BUSREQ */ | |
1462 | usb_gadget_vbus_connect(isp->otg.gadget); | |
1463 | OTG_CTRL_REG |= OTG_A_SETB_HNPEN; | |
1464 | ||
1465 | break; | |
1466 | case OTG_STATE_A_PERIPHERAL: | |
1467 | /* initiated by B-Host suspend */ | |
1468 | break; | |
1469 | default: | |
1470 | return -EILSEQ; | |
1471 | } | |
1472 | pr_debug("otg: HNP %s, %06x ...\n", | |
1473 | state_name(isp), OTG_CTRL_REG); | |
1474 | check_state(isp, __FUNCTION__); | |
1475 | return 0; | |
1476 | #else | |
1477 | /* srp-only */ | |
1478 | return -EINVAL; | |
1479 | #endif | |
1480 | } | |
1481 | ||
1482 | /*-------------------------------------------------------------------------*/ | |
1483 | ||
1484 | /* no error returns, they'd just make bus scanning stop */ | |
1485 | static int isp1301_probe(struct i2c_adapter *bus, int address, int kind) | |
1486 | { | |
1487 | int status; | |
1488 | struct isp1301 *isp; | |
1489 | struct i2c_client *i2c; | |
1490 | ||
1491 | if (the_transceiver) | |
1492 | return 0; | |
1493 | ||
82ca76b6 | 1494 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
1da177e4 LT |
1495 | if (!isp) |
1496 | return 0; | |
1497 | ||
1498 | INIT_WORK(&isp->work, isp1301_work, isp); | |
1499 | init_timer(&isp->timer); | |
1500 | isp->timer.function = isp1301_timer; | |
1501 | isp->timer.data = (unsigned long) isp; | |
1502 | ||
1503 | isp->irq = -1; | |
1504 | isp->client.addr = address; | |
1505 | i2c_set_clientdata(&isp->client, isp); | |
1506 | isp->client.adapter = bus; | |
1507 | isp->client.driver = &isp1301_driver; | |
1508 | strlcpy(isp->client.name, DRIVER_NAME, I2C_NAME_SIZE); | |
1509 | i2c = &isp->client; | |
1510 | ||
1511 | /* if this is a true probe, verify the chip ... */ | |
1512 | if (kind < 0) { | |
1513 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); | |
1514 | if (status != I2C_VENDOR_ID_PHILIPS) { | |
1515 | dev_dbg(&bus->dev, "addr %d not philips id: %d\n", | |
1516 | address, status); | |
1517 | goto fail1; | |
1518 | } | |
1519 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); | |
1520 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { | |
1521 | dev_dbg(&bus->dev, "%d not isp1301, %d\n", | |
1522 | address, status); | |
1523 | goto fail1; | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | status = i2c_attach_client(i2c); | |
1528 | if (status < 0) { | |
1529 | dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n", | |
1530 | DRIVER_NAME, address, status); | |
1531 | fail1: | |
1532 | kfree(isp); | |
1533 | return 0; | |
1534 | } | |
1535 | isp->i2c_release = i2c->dev.release; | |
1536 | i2c->dev.release = isp1301_release; | |
1537 | ||
1538 | /* initial development used chiprev 2.00 */ | |
1539 | status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); | |
1540 | dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", | |
1541 | status >> 8, status & 0xff); | |
1542 | ||
1543 | /* make like power-on reset */ | |
1544 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); | |
1545 | ||
1546 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); | |
1547 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); | |
1548 | ||
1549 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1550 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); | |
1551 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1552 | ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
1553 | ||
1554 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); | |
1555 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1556 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1557 | ||
1558 | #ifdef CONFIG_USB_OTG | |
1559 | status = otg_bind(isp); | |
1560 | if (status < 0) { | |
1561 | dev_dbg(&i2c->dev, "can't bind OTG\n"); | |
1562 | goto fail2; | |
1563 | } | |
1564 | #endif | |
1565 | ||
1566 | if (machine_is_omap_h2()) { | |
1567 | /* full speed signaling by default */ | |
1568 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1569 | MC1_SPEED_REG); | |
1570 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, | |
1571 | MC2_SPD_SUSP_CTRL); | |
1572 | ||
1573 | /* IRQ wired at M14 */ | |
1574 | omap_cfg_reg(M14_1510_GPIO2); | |
1575 | isp->irq = OMAP_GPIO_IRQ(2); | |
1576 | omap_request_gpio(2); | |
1577 | omap_set_gpio_direction(2, 1); | |
1578 | omap_set_gpio_edge_ctrl(2, OMAP_GPIO_FALLING_EDGE); | |
1579 | } | |
1580 | ||
1581 | status = request_irq(isp->irq, isp1301_irq, | |
1582 | SA_SAMPLE_RANDOM, DRIVER_NAME, isp); | |
1583 | if (status < 0) { | |
1584 | dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", | |
1585 | isp->irq, status); | |
1586 | #ifdef CONFIG_USB_OTG | |
1587 | fail2: | |
1588 | #endif | |
1589 | i2c_detach_client(i2c); | |
1590 | goto fail1; | |
1591 | } | |
1592 | ||
1593 | isp->otg.dev = &isp->client.dev; | |
1594 | isp->otg.label = DRIVER_NAME; | |
1595 | ||
1596 | isp->otg.set_host = isp1301_set_host, | |
1597 | isp->otg.set_peripheral = isp1301_set_peripheral, | |
1598 | isp->otg.set_power = isp1301_set_power, | |
1599 | isp->otg.start_srp = isp1301_start_srp, | |
1600 | isp->otg.start_hnp = isp1301_start_hnp, | |
1601 | ||
1602 | enable_vbus_draw(isp, 0); | |
1603 | power_down(isp); | |
1604 | the_transceiver = isp; | |
1605 | ||
1606 | #ifdef CONFIG_USB_OTG | |
1607 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
1608 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
1609 | #endif | |
1610 | ||
1611 | dump_regs(isp, __FUNCTION__); | |
1612 | ||
1613 | #ifdef VERBOSE | |
1614 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1615 | dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); | |
1616 | #endif | |
1617 | ||
1618 | status = otg_set_transceiver(&isp->otg); | |
1619 | if (status < 0) | |
1620 | dev_err(&i2c->dev, "can't register transceiver, %d\n", | |
1621 | status); | |
1622 | ||
1623 | return 0; | |
1624 | } | |
1625 | ||
1626 | static int isp1301_scan_bus(struct i2c_adapter *bus) | |
1627 | { | |
1628 | if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA | |
1629 | | I2C_FUNC_SMBUS_READ_WORD_DATA)) | |
1630 | return -EINVAL; | |
1631 | return i2c_probe(bus, &addr_data, isp1301_probe); | |
1632 | } | |
1633 | ||
1634 | static struct i2c_driver isp1301_driver = { | |
1635 | .owner = THIS_MODULE, | |
1636 | .name = "isp1301_omap", | |
1637 | .id = 1301, /* FIXME "official", i2c-ids.h */ | |
1638 | .class = I2C_CLASS_HWMON, | |
1da177e4 LT |
1639 | .attach_adapter = isp1301_scan_bus, |
1640 | .detach_client = isp1301_detach_client, | |
1641 | }; | |
1642 | ||
1643 | /*-------------------------------------------------------------------------*/ | |
1644 | ||
1645 | static int __init isp_init(void) | |
1646 | { | |
1647 | return i2c_add_driver(&isp1301_driver); | |
1648 | } | |
1649 | module_init(isp_init); | |
1650 | ||
1651 | static void __exit isp_exit(void) | |
1652 | { | |
1653 | if (the_transceiver) | |
1654 | otg_set_transceiver(0); | |
1655 | i2c_del_driver(&isp1301_driver); | |
1656 | } | |
1657 | module_exit(isp_exit); | |
1658 |