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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 | */ | |
1da177e4 | 21 | |
1da177e4 LT |
22 | #include <linux/kernel.h> |
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/interrupt.h> | |
d052d1be | 27 | #include <linux/platform_device.h> |
5f848137 | 28 | #include <linux/usb/ch9.h> |
187426e6 | 29 | #include <linux/usb/gadget.h> |
1da177e4 | 30 | #include <linux/usb.h> |
3a16f7b4 | 31 | #include <linux/usb/otg.h> |
1da177e4 LT |
32 | #include <linux/i2c.h> |
33 | #include <linux/workqueue.h> | |
34 | ||
35 | #include <asm/irq.h> | |
36 | #include <asm/arch/usb.h> | |
37 | ||
38 | ||
39 | #ifndef DEBUG | |
40 | #undef VERBOSE | |
41 | #endif | |
42 | ||
43 | ||
44 | #define DRIVER_VERSION "24 August 2004" | |
25da383d | 45 | #define DRIVER_NAME (isp1301_driver.driver.name) |
1da177e4 LT |
46 | |
47 | MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
50 | struct isp1301 { | |
51 | struct otg_transceiver otg; | |
52 | struct i2c_client client; | |
53 | void (*i2c_release)(struct device *dev); | |
54 | ||
55 | int irq; | |
25da383d | 56 | int irq_type; |
1da177e4 LT |
57 | |
58 | u32 last_otg_ctrl; | |
59 | unsigned working:1; | |
60 | ||
61 | struct timer_list timer; | |
62 | ||
63 | /* use keventd context to change the state for us */ | |
64 | struct work_struct work; | |
25da383d | 65 | |
1da177e4 LT |
66 | unsigned long todo; |
67 | # define WORK_UPDATE_ISP 0 /* update ISP from OTG */ | |
68 | # define WORK_UPDATE_OTG 1 /* update OTG from ISP */ | |
69 | # define WORK_HOST_RESUME 4 /* resume host */ | |
70 | # define WORK_TIMER 6 /* timer fired */ | |
71 | # define WORK_STOP 7 /* don't resubmit */ | |
72 | }; | |
73 | ||
74 | ||
75 | /* bits in OTG_CTRL_REG */ | |
76 | ||
77 | #define OTG_XCEIV_OUTPUTS \ | |
78 | (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) | |
79 | #define OTG_XCEIV_INPUTS \ | |
80 | (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) | |
81 | #define OTG_CTRL_BITS \ | |
82 | (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) | |
83 | /* and OTG_PULLUP is sometimes written */ | |
84 | ||
85 | #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ | |
86 | OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ | |
87 | OTG_CTRL_BITS) | |
88 | ||
89 | ||
90 | /*-------------------------------------------------------------------------*/ | |
91 | ||
92 | #ifdef CONFIG_MACH_OMAP_H2 | |
93 | ||
94 | /* board-specific PM hooks */ | |
95 | ||
25da383d | 96 | #include <asm/gpio.h> |
1da177e4 LT |
97 | #include <asm/arch/mux.h> |
98 | #include <asm/mach-types.h> | |
99 | ||
100 | ||
101 | #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE) | |
102 | ||
103 | #include <asm/arch/tps65010.h> | |
104 | ||
105 | #else | |
106 | ||
107 | static inline int tps65010_set_vbus_draw(unsigned mA) | |
108 | { | |
109 | pr_debug("tps65010: draw %d mA (STUB)\n", mA); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | #endif | |
114 | ||
115 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
116 | { | |
117 | int status = tps65010_set_vbus_draw(mA); | |
118 | if (status < 0) | |
119 | pr_debug(" VBUS %d mA error %d\n", mA, status); | |
120 | } | |
121 | ||
122 | static void enable_vbus_source(struct isp1301 *isp) | |
123 | { | |
124 | /* this board won't supply more than 8mA vbus power. | |
125 | * some boards can switch a 100ma "unit load" (or more). | |
126 | */ | |
127 | } | |
128 | ||
129 | ||
130 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
131 | static inline void notresponding(struct isp1301 *isp) | |
132 | { | |
133 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
134 | } | |
135 | ||
136 | ||
137 | #endif | |
138 | ||
139 | /*-------------------------------------------------------------------------*/ | |
140 | ||
141 | /* only two addresses possible */ | |
142 | #define ISP_BASE 0x2c | |
143 | static unsigned short normal_i2c[] = { | |
144 | ISP_BASE, ISP_BASE + 1, | |
145 | I2C_CLIENT_END }; | |
1da177e4 LT |
146 | |
147 | I2C_CLIENT_INSMOD; | |
148 | ||
149 | static struct i2c_driver isp1301_driver; | |
150 | ||
151 | /* smbus apis are used for portability */ | |
152 | ||
153 | static inline u8 | |
154 | isp1301_get_u8(struct isp1301 *isp, u8 reg) | |
155 | { | |
156 | return i2c_smbus_read_byte_data(&isp->client, reg + 0); | |
157 | } | |
158 | ||
159 | static inline int | |
160 | isp1301_get_u16(struct isp1301 *isp, u8 reg) | |
161 | { | |
162 | return i2c_smbus_read_word_data(&isp->client, reg); | |
163 | } | |
164 | ||
165 | static inline int | |
166 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
167 | { | |
168 | return i2c_smbus_write_byte_data(&isp->client, reg + 0, bits); | |
169 | } | |
170 | ||
171 | static inline int | |
172 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
173 | { | |
174 | return i2c_smbus_write_byte_data(&isp->client, reg + 1, bits); | |
175 | } | |
176 | ||
177 | /*-------------------------------------------------------------------------*/ | |
178 | ||
179 | /* identification */ | |
180 | #define ISP1301_VENDOR_ID 0x00 /* u16 read */ | |
181 | #define ISP1301_PRODUCT_ID 0x02 /* u16 read */ | |
182 | #define ISP1301_BCD_DEVICE 0x14 /* u16 read */ | |
183 | ||
184 | #define I2C_VENDOR_ID_PHILIPS 0x04cc | |
185 | #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 | |
186 | ||
187 | /* operational registers */ | |
188 | #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ | |
189 | # define MC1_SPEED_REG (1 << 0) | |
190 | # define MC1_SUSPEND_REG (1 << 1) | |
191 | # define MC1_DAT_SE0 (1 << 2) | |
192 | # define MC1_TRANSPARENT (1 << 3) | |
193 | # define MC1_BDIS_ACON_EN (1 << 4) | |
194 | # define MC1_OE_INT_EN (1 << 5) | |
195 | # define MC1_UART_EN (1 << 6) | |
196 | # define MC1_MASK 0x7f | |
197 | #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ | |
198 | # define MC2_GLOBAL_PWR_DN (1 << 0) | |
199 | # define MC2_SPD_SUSP_CTRL (1 << 1) | |
200 | # define MC2_BI_DI (1 << 2) | |
201 | # define MC2_TRANSP_BDIR0 (1 << 3) | |
202 | # define MC2_TRANSP_BDIR1 (1 << 4) | |
203 | # define MC2_AUDIO_EN (1 << 5) | |
204 | # define MC2_PSW_EN (1 << 6) | |
205 | # define MC2_EN2V7 (1 << 7) | |
206 | #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ | |
207 | # define OTG1_DP_PULLUP (1 << 0) | |
208 | # define OTG1_DM_PULLUP (1 << 1) | |
209 | # define OTG1_DP_PULLDOWN (1 << 2) | |
210 | # define OTG1_DM_PULLDOWN (1 << 3) | |
211 | # define OTG1_ID_PULLDOWN (1 << 4) | |
212 | # define OTG1_VBUS_DRV (1 << 5) | |
213 | # define OTG1_VBUS_DISCHRG (1 << 6) | |
214 | # define OTG1_VBUS_CHRG (1 << 7) | |
215 | #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ | |
216 | # define OTG_B_SESS_END (1 << 6) | |
217 | # define OTG_B_SESS_VLD (1 << 7) | |
218 | ||
219 | #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ | |
220 | #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ | |
221 | ||
222 | #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ | |
223 | #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ | |
224 | ||
225 | /* same bitfields in all interrupt registers */ | |
226 | # define INTR_VBUS_VLD (1 << 0) | |
227 | # define INTR_SESS_VLD (1 << 1) | |
228 | # define INTR_DP_HI (1 << 2) | |
229 | # define INTR_ID_GND (1 << 3) | |
230 | # define INTR_DM_HI (1 << 4) | |
231 | # define INTR_ID_FLOAT (1 << 5) | |
232 | # define INTR_BDIS_ACON (1 << 6) | |
233 | # define INTR_CR_INT (1 << 7) | |
234 | ||
235 | /*-------------------------------------------------------------------------*/ | |
236 | ||
237 | static const char *state_string(enum usb_otg_state state) | |
238 | { | |
239 | switch (state) { | |
240 | case OTG_STATE_A_IDLE: return "a_idle"; | |
241 | case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; | |
242 | case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; | |
243 | case OTG_STATE_A_HOST: return "a_host"; | |
244 | case OTG_STATE_A_SUSPEND: return "a_suspend"; | |
245 | case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; | |
246 | case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; | |
247 | case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; | |
248 | case OTG_STATE_B_IDLE: return "b_idle"; | |
249 | case OTG_STATE_B_SRP_INIT: return "b_srp_init"; | |
250 | case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; | |
251 | case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; | |
252 | case OTG_STATE_B_HOST: return "b_host"; | |
253 | default: return "UNDEFINED"; | |
254 | } | |
255 | } | |
256 | ||
257 | static inline const char *state_name(struct isp1301 *isp) | |
258 | { | |
259 | return state_string(isp->otg.state); | |
260 | } | |
261 | ||
262 | #ifdef VERBOSE | |
263 | #define dev_vdbg dev_dbg | |
264 | #else | |
265 | #define dev_vdbg(dev, fmt, arg...) do{}while(0) | |
266 | #endif | |
267 | ||
268 | /*-------------------------------------------------------------------------*/ | |
269 | ||
270 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; | |
271 | * not everything is guarded by board-specific checks, or even using | |
272 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. | |
273 | * | |
274 | * ALSO: this currently doesn't use ISP1301 low-power modes | |
275 | * while OTG is running. | |
276 | */ | |
277 | ||
278 | static void power_down(struct isp1301 *isp) | |
279 | { | |
280 | isp->otg.state = OTG_STATE_UNDEFINED; | |
281 | ||
282 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
283 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG); | |
284 | ||
285 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); | |
286 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
287 | } | |
288 | ||
289 | static void power_up(struct isp1301 *isp) | |
290 | { | |
291 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
292 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND_REG); | |
25da383d | 293 | |
1da177e4 LT |
294 | /* do this only when cpu is driving transceiver, |
295 | * so host won't see a low speed device... | |
296 | */ | |
297 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
298 | } | |
299 | ||
300 | #define NO_HOST_SUSPEND | |
301 | ||
302 | static int host_suspend(struct isp1301 *isp) | |
303 | { | |
304 | #ifdef NO_HOST_SUSPEND | |
305 | return 0; | |
306 | #else | |
307 | struct device *dev; | |
308 | ||
309 | if (!isp->otg.host) | |
310 | return -ENODEV; | |
311 | ||
312 | /* Currently ASSUMES only the OTG port matters; | |
313 | * other ports could be active... | |
314 | */ | |
315 | dev = isp->otg.host->controller; | |
316 | return dev->driver->suspend(dev, 3, 0); | |
317 | #endif | |
318 | } | |
319 | ||
320 | static int host_resume(struct isp1301 *isp) | |
321 | { | |
322 | #ifdef NO_HOST_SUSPEND | |
323 | return 0; | |
324 | #else | |
325 | struct device *dev; | |
326 | ||
327 | if (!isp->otg.host) | |
328 | return -ENODEV; | |
329 | ||
330 | dev = isp->otg.host->controller; | |
331 | return dev->driver->resume(dev, 0); | |
332 | #endif | |
333 | } | |
334 | ||
335 | static int gadget_suspend(struct isp1301 *isp) | |
336 | { | |
337 | isp->otg.gadget->b_hnp_enable = 0; | |
338 | isp->otg.gadget->a_hnp_support = 0; | |
339 | isp->otg.gadget->a_alt_hnp_support = 0; | |
340 | return usb_gadget_vbus_disconnect(isp->otg.gadget); | |
341 | } | |
342 | ||
343 | /*-------------------------------------------------------------------------*/ | |
344 | ||
345 | #define TIMER_MINUTES 10 | |
346 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) | |
347 | ||
348 | /* Almost all our I2C messaging comes from a work queue's task context. | |
349 | * NOTE: guaranteeing certain response times might mean we shouldn't | |
350 | * share keventd's work queue; a realtime task might be safest. | |
351 | */ | |
352 | void | |
353 | isp1301_defer_work(struct isp1301 *isp, int work) | |
354 | { | |
355 | int status; | |
356 | ||
357 | if (isp && !test_and_set_bit(work, &isp->todo)) { | |
358 | (void) get_device(&isp->client.dev); | |
359 | status = schedule_work(&isp->work); | |
360 | if (!status && !isp->working) | |
361 | dev_vdbg(&isp->client.dev, | |
362 | "work item %d may be lost\n", work); | |
363 | } | |
364 | } | |
365 | ||
366 | /* called from irq handlers */ | |
367 | static void a_idle(struct isp1301 *isp, const char *tag) | |
368 | { | |
369 | if (isp->otg.state == OTG_STATE_A_IDLE) | |
370 | return; | |
371 | ||
372 | isp->otg.default_a = 1; | |
373 | if (isp->otg.host) { | |
374 | isp->otg.host->is_b_host = 0; | |
375 | host_suspend(isp); | |
376 | } | |
377 | if (isp->otg.gadget) { | |
378 | isp->otg.gadget->is_a_peripheral = 1; | |
379 | gadget_suspend(isp); | |
380 | } | |
381 | isp->otg.state = OTG_STATE_A_IDLE; | |
382 | isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
383 | pr_debug(" --> %s/%s\n", state_name(isp), tag); | |
384 | } | |
385 | ||
386 | /* called from irq handlers */ | |
387 | static void b_idle(struct isp1301 *isp, const char *tag) | |
388 | { | |
389 | if (isp->otg.state == OTG_STATE_B_IDLE) | |
390 | return; | |
391 | ||
392 | isp->otg.default_a = 0; | |
393 | if (isp->otg.host) { | |
394 | isp->otg.host->is_b_host = 1; | |
395 | host_suspend(isp); | |
396 | } | |
397 | if (isp->otg.gadget) { | |
398 | isp->otg.gadget->is_a_peripheral = 0; | |
399 | gadget_suspend(isp); | |
400 | } | |
401 | isp->otg.state = OTG_STATE_B_IDLE; | |
402 | isp->last_otg_ctrl = OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
403 | pr_debug(" --> %s/%s\n", state_name(isp), tag); | |
404 | } | |
405 | ||
406 | static void | |
407 | dump_regs(struct isp1301 *isp, const char *label) | |
408 | { | |
409 | #ifdef DEBUG | |
410 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); | |
411 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
412 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
413 | ||
414 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", | |
415 | OTG_CTRL_REG, label, state_name(isp), | |
416 | ctrl, status, src); | |
417 | /* mode control and irq enables don't change much */ | |
418 | #endif | |
419 | } | |
420 | ||
421 | /*-------------------------------------------------------------------------*/ | |
422 | ||
423 | #ifdef CONFIG_USB_OTG | |
424 | ||
425 | /* | |
426 | * The OMAP OTG controller handles most of the OTG state transitions. | |
427 | * | |
428 | * We translate isp1301 outputs (mostly voltage comparator status) into | |
429 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state | |
430 | * flags into isp1301 inputs ... and infer state transitions. | |
431 | */ | |
432 | ||
433 | #ifdef VERBOSE | |
434 | ||
435 | static void check_state(struct isp1301 *isp, const char *tag) | |
436 | { | |
437 | enum usb_otg_state state = OTG_STATE_UNDEFINED; | |
438 | u8 fsm = OTG_TEST_REG & 0x0ff; | |
439 | unsigned extra = 0; | |
440 | ||
441 | switch (fsm) { | |
442 | ||
443 | /* default-b */ | |
444 | case 0x0: | |
445 | state = OTG_STATE_B_IDLE; | |
446 | break; | |
447 | case 0x3: | |
448 | case 0x7: | |
449 | extra = 1; | |
450 | case 0x1: | |
451 | state = OTG_STATE_B_PERIPHERAL; | |
452 | break; | |
453 | case 0x11: | |
454 | state = OTG_STATE_B_SRP_INIT; | |
455 | break; | |
456 | ||
457 | /* extra dual-role default-b states */ | |
458 | case 0x12: | |
459 | case 0x13: | |
460 | case 0x16: | |
461 | extra = 1; | |
462 | case 0x17: | |
463 | state = OTG_STATE_B_WAIT_ACON; | |
464 | break; | |
465 | case 0x34: | |
466 | state = OTG_STATE_B_HOST; | |
467 | break; | |
468 | ||
469 | /* default-a */ | |
470 | case 0x36: | |
471 | state = OTG_STATE_A_IDLE; | |
472 | break; | |
473 | case 0x3c: | |
474 | state = OTG_STATE_A_WAIT_VFALL; | |
475 | break; | |
476 | case 0x7d: | |
477 | state = OTG_STATE_A_VBUS_ERR; | |
478 | break; | |
479 | case 0x9e: | |
480 | case 0x9f: | |
481 | extra = 1; | |
482 | case 0x89: | |
483 | state = OTG_STATE_A_PERIPHERAL; | |
484 | break; | |
485 | case 0xb7: | |
486 | state = OTG_STATE_A_WAIT_VRISE; | |
487 | break; | |
488 | case 0xb8: | |
489 | state = OTG_STATE_A_WAIT_BCON; | |
490 | break; | |
491 | case 0xb9: | |
492 | state = OTG_STATE_A_HOST; | |
493 | break; | |
494 | case 0xba: | |
495 | state = OTG_STATE_A_SUSPEND; | |
496 | break; | |
497 | default: | |
498 | break; | |
499 | } | |
500 | if (isp->otg.state == state && !extra) | |
501 | return; | |
502 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, | |
503 | state_string(state), fsm, state_name(isp), OTG_CTRL_REG); | |
504 | } | |
505 | ||
506 | #else | |
507 | ||
508 | static inline void check_state(struct isp1301 *isp, const char *tag) { } | |
509 | ||
510 | #endif | |
511 | ||
512 | /* outputs from ISP1301_INTERRUPT_SOURCE */ | |
513 | static void update_otg1(struct isp1301 *isp, u8 int_src) | |
514 | { | |
515 | u32 otg_ctrl; | |
516 | ||
517 | otg_ctrl = OTG_CTRL_REG | |
518 | & OTG_CTRL_MASK | |
519 | & ~OTG_XCEIV_INPUTS | |
520 | & ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); | |
521 | if (int_src & INTR_SESS_VLD) | |
522 | otg_ctrl |= OTG_ASESSVLD; | |
523 | else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) { | |
524 | a_idle(isp, "vfall"); | |
525 | otg_ctrl &= ~OTG_CTRL_BITS; | |
526 | } | |
527 | if (int_src & INTR_VBUS_VLD) | |
528 | otg_ctrl |= OTG_VBUSVLD; | |
529 | if (int_src & INTR_ID_GND) { /* default-A */ | |
530 | if (isp->otg.state == OTG_STATE_B_IDLE | |
531 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
532 | a_idle(isp, "init"); | |
533 | return; | |
534 | } | |
535 | } else { /* default-B */ | |
536 | otg_ctrl |= OTG_ID; | |
537 | if (isp->otg.state == OTG_STATE_A_IDLE | |
538 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
539 | b_idle(isp, "init"); | |
540 | return; | |
541 | } | |
542 | } | |
543 | OTG_CTRL_REG = otg_ctrl; | |
544 | } | |
545 | ||
546 | /* outputs from ISP1301_OTG_STATUS */ | |
547 | static void update_otg2(struct isp1301 *isp, u8 otg_status) | |
548 | { | |
549 | u32 otg_ctrl; | |
550 | ||
551 | otg_ctrl = OTG_CTRL_REG | |
552 | & OTG_CTRL_MASK | |
553 | & ~OTG_XCEIV_INPUTS | |
554 | & ~(OTG_BSESSVLD|OTG_BSESSEND); | |
555 | if (otg_status & OTG_B_SESS_VLD) | |
556 | otg_ctrl |= OTG_BSESSVLD; | |
557 | else if (otg_status & OTG_B_SESS_END) | |
558 | otg_ctrl |= OTG_BSESSEND; | |
559 | OTG_CTRL_REG = otg_ctrl; | |
560 | } | |
561 | ||
562 | /* inputs going to ISP1301 */ | |
563 | static void otg_update_isp(struct isp1301 *isp) | |
564 | { | |
565 | u32 otg_ctrl, otg_change; | |
566 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; | |
567 | ||
568 | otg_ctrl = OTG_CTRL_REG; | |
569 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; | |
570 | isp->last_otg_ctrl = otg_ctrl; | |
571 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; | |
572 | ||
573 | switch (isp->otg.state) { | |
574 | case OTG_STATE_B_IDLE: | |
575 | case OTG_STATE_B_PERIPHERAL: | |
576 | case OTG_STATE_B_SRP_INIT: | |
577 | if (!(otg_ctrl & OTG_PULLUP)) { | |
578 | // if (otg_ctrl & OTG_B_HNPEN) { | |
579 | if (isp->otg.gadget->b_hnp_enable) { | |
580 | isp->otg.state = OTG_STATE_B_WAIT_ACON; | |
581 | pr_debug(" --> b_wait_acon\n"); | |
582 | } | |
583 | goto pulldown; | |
584 | } | |
585 | pullup: | |
586 | set |= OTG1_DP_PULLUP; | |
587 | clr |= OTG1_DP_PULLDOWN; | |
588 | break; | |
589 | case OTG_STATE_A_SUSPEND: | |
590 | case OTG_STATE_A_PERIPHERAL: | |
591 | if (otg_ctrl & OTG_PULLUP) | |
592 | goto pullup; | |
593 | /* FALLTHROUGH */ | |
594 | // case OTG_STATE_B_WAIT_ACON: | |
595 | default: | |
596 | pulldown: | |
597 | set |= OTG1_DP_PULLDOWN; | |
598 | clr |= OTG1_DP_PULLUP; | |
599 | break; | |
600 | } | |
601 | ||
602 | # define toggle(OTG,ISP) do { \ | |
603 | if (otg_ctrl & OTG) set |= ISP; \ | |
604 | else clr |= ISP; \ | |
605 | } while (0) | |
606 | ||
607 | if (!(isp->otg.host)) | |
608 | otg_ctrl &= ~OTG_DRV_VBUS; | |
609 | ||
610 | switch (isp->otg.state) { | |
611 | case OTG_STATE_A_SUSPEND: | |
612 | if (otg_ctrl & OTG_DRV_VBUS) { | |
613 | set |= OTG1_VBUS_DRV; | |
614 | break; | |
615 | } | |
616 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ | |
617 | notresponding(isp); | |
618 | ||
619 | /* FALLTHROUGH */ | |
620 | case OTG_STATE_A_VBUS_ERR: | |
621 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
622 | pr_debug(" --> a_wait_vfall\n"); | |
623 | /* FALLTHROUGH */ | |
624 | case OTG_STATE_A_WAIT_VFALL: | |
625 | /* FIXME usbcore thinks port power is still on ... */ | |
626 | clr |= OTG1_VBUS_DRV; | |
627 | break; | |
628 | case OTG_STATE_A_IDLE: | |
629 | if (otg_ctrl & OTG_DRV_VBUS) { | |
630 | isp->otg.state = OTG_STATE_A_WAIT_VRISE; | |
631 | pr_debug(" --> a_wait_vrise\n"); | |
632 | } | |
633 | /* FALLTHROUGH */ | |
634 | default: | |
635 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); | |
636 | } | |
637 | ||
638 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); | |
639 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); | |
640 | ||
641 | # undef toggle | |
642 | ||
643 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); | |
644 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); | |
645 | ||
646 | /* HNP switch to host or peripheral; and SRP */ | |
647 | if (otg_change & OTG_PULLUP) { | |
648 | switch (isp->otg.state) { | |
649 | case OTG_STATE_B_IDLE: | |
650 | if (clr & OTG1_DP_PULLUP) | |
651 | break; | |
652 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
653 | pr_debug(" --> b_peripheral\n"); | |
654 | break; | |
655 | case OTG_STATE_A_SUSPEND: | |
656 | if (clr & OTG1_DP_PULLUP) | |
657 | break; | |
658 | isp->otg.state = OTG_STATE_A_PERIPHERAL; | |
659 | pr_debug(" --> a_peripheral\n"); | |
660 | break; | |
661 | default: | |
662 | break; | |
663 | } | |
664 | OTG_CTRL_REG |= OTG_PULLUP; | |
665 | } | |
666 | ||
667 | check_state(isp, __FUNCTION__); | |
668 | dump_regs(isp, "otg->isp1301"); | |
669 | } | |
670 | ||
7d12e780 | 671 | static irqreturn_t omap_otg_irq(int irq, void *_isp) |
1da177e4 LT |
672 | { |
673 | u16 otg_irq = OTG_IRQ_SRC_REG; | |
674 | u32 otg_ctrl; | |
675 | int ret = IRQ_NONE; | |
676 | struct isp1301 *isp = _isp; | |
677 | ||
678 | /* update ISP1301 transciever from OTG controller */ | |
679 | if (otg_irq & OPRT_CHG) { | |
680 | OTG_IRQ_SRC_REG = OPRT_CHG; | |
681 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
682 | ret = IRQ_HANDLED; | |
683 | ||
684 | /* SRP to become b_peripheral failed */ | |
685 | } else if (otg_irq & B_SRP_TMROUT) { | |
686 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", OTG_CTRL_REG); | |
687 | notresponding(isp); | |
688 | ||
689 | /* gadget drivers that care should monitor all kinds of | |
690 | * remote wakeup (SRP, normal) using their own timer | |
691 | * to give "check cable and A-device" messages. | |
692 | */ | |
693 | if (isp->otg.state == OTG_STATE_B_SRP_INIT) | |
694 | b_idle(isp, "srp_timeout"); | |
695 | ||
696 | OTG_IRQ_SRC_REG = B_SRP_TMROUT; | |
697 | ret = IRQ_HANDLED; | |
698 | ||
699 | /* HNP to become b_host failed */ | |
700 | } else if (otg_irq & B_HNP_FAIL) { | |
701 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", | |
702 | state_name(isp), OTG_CTRL_REG); | |
703 | notresponding(isp); | |
704 | ||
705 | otg_ctrl = OTG_CTRL_REG; | |
706 | otg_ctrl |= OTG_BUSDROP; | |
707 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
708 | OTG_CTRL_REG = otg_ctrl; | |
709 | ||
710 | /* subset of b_peripheral()... */ | |
711 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
712 | pr_debug(" --> b_peripheral\n"); | |
713 | ||
714 | OTG_IRQ_SRC_REG = B_HNP_FAIL; | |
715 | ret = IRQ_HANDLED; | |
716 | ||
717 | /* detect SRP from B-device ... */ | |
718 | } else if (otg_irq & A_SRP_DETECT) { | |
719 | pr_debug("otg: %s SRP_DETECT, %06x\n", | |
720 | state_name(isp), OTG_CTRL_REG); | |
721 | ||
722 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
723 | switch (isp->otg.state) { | |
724 | case OTG_STATE_A_IDLE: | |
725 | if (!isp->otg.host) | |
726 | break; | |
727 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
728 | otg_ctrl = OTG_CTRL_REG; | |
729 | otg_ctrl |= OTG_A_BUSREQ; | |
730 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
731 | & ~OTG_XCEIV_INPUTS | |
732 | & OTG_CTRL_MASK; | |
733 | OTG_CTRL_REG = otg_ctrl; | |
734 | break; | |
735 | default: | |
736 | break; | |
737 | } | |
738 | ||
739 | OTG_IRQ_SRC_REG = A_SRP_DETECT; | |
740 | ret = IRQ_HANDLED; | |
741 | ||
742 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) | |
743 | * we don't track them separately | |
744 | */ | |
745 | } else if (otg_irq & A_REQ_TMROUT) { | |
746 | otg_ctrl = OTG_CTRL_REG; | |
747 | pr_info("otg: BCON_TMOUT from %s, %06x\n", | |
748 | state_name(isp), otg_ctrl); | |
749 | notresponding(isp); | |
750 | ||
751 | otg_ctrl |= OTG_BUSDROP; | |
752 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
753 | OTG_CTRL_REG = otg_ctrl; | |
754 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
755 | ||
756 | OTG_IRQ_SRC_REG = A_REQ_TMROUT; | |
757 | ret = IRQ_HANDLED; | |
758 | ||
759 | /* A-supplied voltage fell too low; overcurrent */ | |
760 | } else if (otg_irq & A_VBUS_ERR) { | |
761 | otg_ctrl = OTG_CTRL_REG; | |
762 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", | |
763 | state_name(isp), otg_irq, otg_ctrl); | |
764 | ||
765 | otg_ctrl |= OTG_BUSDROP; | |
766 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
767 | OTG_CTRL_REG = otg_ctrl; | |
768 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
769 | ||
770 | OTG_IRQ_SRC_REG = A_VBUS_ERR; | |
771 | ret = IRQ_HANDLED; | |
772 | ||
773 | /* switch driver; the transciever code activates it, | |
774 | * ungating the udc clock or resuming OHCI. | |
775 | */ | |
776 | } else if (otg_irq & DRIVER_SWITCH) { | |
777 | int kick = 0; | |
778 | ||
779 | otg_ctrl = OTG_CTRL_REG; | |
780 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", | |
781 | state_name(isp), | |
782 | (otg_ctrl & OTG_DRIVER_SEL) | |
783 | ? "gadget" : "host", | |
784 | otg_ctrl); | |
785 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
786 | ||
787 | /* role is peripheral */ | |
788 | if (otg_ctrl & OTG_DRIVER_SEL) { | |
789 | switch (isp->otg.state) { | |
790 | case OTG_STATE_A_IDLE: | |
791 | b_idle(isp, __FUNCTION__); | |
792 | break; | |
793 | default: | |
794 | break; | |
795 | } | |
796 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
797 | ||
798 | /* role is host */ | |
799 | } else { | |
800 | if (!(otg_ctrl & OTG_ID)) { | |
25da383d | 801 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
1da177e4 LT |
802 | OTG_CTRL_REG = otg_ctrl | OTG_A_BUSREQ; |
803 | } | |
804 | ||
805 | if (isp->otg.host) { | |
806 | switch (isp->otg.state) { | |
807 | case OTG_STATE_B_WAIT_ACON: | |
808 | isp->otg.state = OTG_STATE_B_HOST; | |
809 | pr_debug(" --> b_host\n"); | |
810 | kick = 1; | |
811 | break; | |
812 | case OTG_STATE_A_WAIT_BCON: | |
813 | isp->otg.state = OTG_STATE_A_HOST; | |
814 | pr_debug(" --> a_host\n"); | |
815 | break; | |
816 | case OTG_STATE_A_PERIPHERAL: | |
817 | isp->otg.state = OTG_STATE_A_WAIT_BCON; | |
818 | pr_debug(" --> a_wait_bcon\n"); | |
819 | break; | |
820 | default: | |
821 | break; | |
822 | } | |
823 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
824 | } | |
825 | } | |
826 | ||
827 | OTG_IRQ_SRC_REG = DRIVER_SWITCH; | |
828 | ret = IRQ_HANDLED; | |
829 | ||
830 | if (kick) | |
831 | usb_bus_start_enum(isp->otg.host, | |
832 | isp->otg.host->otg_port); | |
833 | } | |
834 | ||
835 | check_state(isp, __FUNCTION__); | |
836 | return ret; | |
837 | } | |
838 | ||
839 | static struct platform_device *otg_dev; | |
840 | ||
841 | static int otg_init(struct isp1301 *isp) | |
842 | { | |
843 | if (!otg_dev) | |
844 | return -ENODEV; | |
845 | ||
846 | dump_regs(isp, __FUNCTION__); | |
847 | /* some of these values are board-specific... */ | |
848 | OTG_SYSCON_2_REG |= OTG_EN | |
849 | /* for B-device: */ | |
850 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ | |
851 | | SRP_GPDVBUS /* discharge after VBUS pulse */ | |
852 | // | (3 << 24) /* 2msec VBUS pulse */ | |
853 | /* for A-device: */ | |
854 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ | |
855 | | SRP_DPW /* detect 167+ns SRP pulses */ | |
856 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ | |
857 | ; | |
858 | ||
859 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
860 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
861 | ||
862 | check_state(isp, __FUNCTION__); | |
863 | pr_debug("otg: %s, %s %06x\n", | |
864 | state_name(isp), __FUNCTION__, OTG_CTRL_REG); | |
865 | ||
866 | OTG_IRQ_EN_REG = DRIVER_SWITCH | OPRT_CHG | |
867 | | B_SRP_TMROUT | B_HNP_FAIL | |
868 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT; | |
869 | OTG_SYSCON_2_REG |= OTG_EN; | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
3ae5eaec | 874 | static int otg_probe(struct platform_device *dev) |
1da177e4 LT |
875 | { |
876 | // struct omap_usb_config *config = dev->platform_data; | |
877 | ||
3ae5eaec | 878 | otg_dev = dev; |
1da177e4 LT |
879 | return 0; |
880 | } | |
881 | ||
3ae5eaec | 882 | static int otg_remove(struct platform_device *dev) |
1da177e4 LT |
883 | { |
884 | otg_dev = 0; | |
885 | return 0; | |
886 | } | |
887 | ||
3ae5eaec | 888 | struct platform_driver omap_otg_driver = { |
1da177e4 | 889 | .probe = otg_probe, |
3ae5eaec RK |
890 | .remove = otg_remove, |
891 | .driver = { | |
892 | .owner = THIS_MODULE, | |
893 | .name = "omap_otg", | |
894 | }, | |
1da177e4 LT |
895 | }; |
896 | ||
897 | static int otg_bind(struct isp1301 *isp) | |
898 | { | |
899 | int status; | |
900 | ||
901 | if (otg_dev) | |
902 | return -EBUSY; | |
903 | ||
3ae5eaec | 904 | status = platform_driver_register(&omap_otg_driver); |
1da177e4 LT |
905 | if (status < 0) |
906 | return status; | |
907 | ||
908 | if (otg_dev) | |
909 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, | |
dace1453 | 910 | IRQF_DISABLED, DRIVER_NAME, isp); |
1da177e4 LT |
911 | else |
912 | status = -ENODEV; | |
913 | ||
914 | if (status < 0) | |
3ae5eaec | 915 | platform_driver_unregister(&omap_otg_driver); |
1da177e4 LT |
916 | return status; |
917 | } | |
918 | ||
919 | static void otg_unbind(struct isp1301 *isp) | |
920 | { | |
921 | if (!otg_dev) | |
922 | return; | |
923 | free_irq(otg_dev->resource[1].start, isp); | |
924 | } | |
925 | ||
926 | #else | |
927 | ||
928 | /* OTG controller isn't clocked */ | |
929 | ||
930 | #endif /* CONFIG_USB_OTG */ | |
931 | ||
932 | /*-------------------------------------------------------------------------*/ | |
933 | ||
934 | static void b_peripheral(struct isp1301 *isp) | |
935 | { | |
936 | OTG_CTRL_REG = OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
937 | usb_gadget_vbus_connect(isp->otg.gadget); | |
938 | ||
939 | #ifdef CONFIG_USB_OTG | |
940 | enable_vbus_draw(isp, 8); | |
941 | otg_update_isp(isp); | |
942 | #else | |
943 | enable_vbus_draw(isp, 100); | |
944 | /* UDC driver just set OTG_BSESSVLD */ | |
945 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); | |
946 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); | |
947 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
948 | pr_debug(" --> b_peripheral\n"); | |
949 | dump_regs(isp, "2periph"); | |
950 | #endif | |
951 | } | |
952 | ||
953 | static void isp_update_otg(struct isp1301 *isp, u8 stat) | |
954 | { | |
955 | u8 isp_stat, isp_bstat; | |
956 | enum usb_otg_state state = isp->otg.state; | |
957 | ||
958 | if (stat & INTR_BDIS_ACON) | |
959 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); | |
960 | ||
961 | /* start certain state transitions right away */ | |
962 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
963 | if (isp_stat & INTR_ID_GND) { | |
964 | if (isp->otg.default_a) { | |
965 | switch (state) { | |
966 | case OTG_STATE_B_IDLE: | |
967 | a_idle(isp, "idle"); | |
968 | /* FALLTHROUGH */ | |
969 | case OTG_STATE_A_IDLE: | |
970 | enable_vbus_source(isp); | |
971 | /* FALLTHROUGH */ | |
972 | case OTG_STATE_A_WAIT_VRISE: | |
973 | /* we skip over OTG_STATE_A_WAIT_BCON, since | |
974 | * the HC will transition to A_HOST (or | |
975 | * A_SUSPEND!) without our noticing except | |
976 | * when HNP is used. | |
977 | */ | |
978 | if (isp_stat & INTR_VBUS_VLD) | |
979 | isp->otg.state = OTG_STATE_A_HOST; | |
980 | break; | |
981 | case OTG_STATE_A_WAIT_VFALL: | |
982 | if (!(isp_stat & INTR_SESS_VLD)) | |
983 | a_idle(isp, "vfell"); | |
984 | break; | |
985 | default: | |
986 | if (!(isp_stat & INTR_VBUS_VLD)) | |
987 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
988 | break; | |
989 | } | |
990 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
991 | } else { | |
992 | switch (state) { | |
993 | case OTG_STATE_B_PERIPHERAL: | |
994 | case OTG_STATE_B_HOST: | |
995 | case OTG_STATE_B_WAIT_ACON: | |
996 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
997 | break; | |
998 | default: | |
999 | break; | |
1000 | } | |
1001 | if (state != OTG_STATE_A_IDLE) | |
1002 | a_idle(isp, "id"); | |
1003 | if (isp->otg.host && state == OTG_STATE_A_IDLE) | |
1004 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
1005 | isp_bstat = 0; | |
1006 | } | |
1007 | } else { | |
1008 | /* if user unplugged mini-A end of cable, | |
1009 | * don't bypass A_WAIT_VFALL. | |
1010 | */ | |
1011 | if (isp->otg.default_a) { | |
1012 | switch (state) { | |
1013 | default: | |
1014 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
1015 | break; | |
1016 | case OTG_STATE_A_WAIT_VFALL: | |
1017 | state = OTG_STATE_A_IDLE; | |
1018 | /* khubd may take a while to notice and | |
1019 | * handle this disconnect, so don't go | |
1020 | * to B_IDLE quite yet. | |
1021 | */ | |
1022 | break; | |
1023 | case OTG_STATE_A_IDLE: | |
1024 | host_suspend(isp); | |
1025 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, | |
1026 | MC1_BDIS_ACON_EN); | |
1027 | isp->otg.state = OTG_STATE_B_IDLE; | |
1028 | OTG_CTRL_REG &= OTG_CTRL_REG & OTG_CTRL_MASK | |
1029 | & ~OTG_CTRL_BITS; | |
1030 | break; | |
1031 | case OTG_STATE_B_IDLE: | |
1032 | break; | |
1033 | } | |
1034 | } | |
1035 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1036 | ||
1037 | switch (isp->otg.state) { | |
1038 | case OTG_STATE_B_PERIPHERAL: | |
1039 | case OTG_STATE_B_WAIT_ACON: | |
1040 | case OTG_STATE_B_HOST: | |
1041 | if (likely(isp_bstat & OTG_B_SESS_VLD)) | |
1042 | break; | |
1043 | enable_vbus_draw(isp, 0); | |
1044 | #ifndef CONFIG_USB_OTG | |
1045 | /* UDC driver will clear OTG_BSESSVLD */ | |
1046 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1047 | OTG1_DP_PULLDOWN); | |
1048 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1049 | OTG1_DP_PULLUP); | |
1050 | dump_regs(isp, __FUNCTION__); | |
1051 | #endif | |
1052 | /* FALLTHROUGH */ | |
1053 | case OTG_STATE_B_SRP_INIT: | |
1054 | b_idle(isp, __FUNCTION__); | |
1055 | OTG_CTRL_REG &= OTG_CTRL_REG & OTG_XCEIV_OUTPUTS; | |
1056 | /* FALLTHROUGH */ | |
1057 | case OTG_STATE_B_IDLE: | |
1058 | if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) { | |
1059 | #ifdef CONFIG_USB_OTG | |
1060 | update_otg1(isp, isp_stat); | |
1061 | update_otg2(isp, isp_bstat); | |
1062 | #endif | |
1063 | b_peripheral(isp); | |
1064 | } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) | |
1065 | isp_bstat |= OTG_B_SESS_END; | |
1066 | break; | |
1067 | case OTG_STATE_A_WAIT_VFALL: | |
1068 | break; | |
1069 | default: | |
1070 | pr_debug("otg: unsupported b-device %s\n", | |
1071 | state_name(isp)); | |
1072 | break; | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | if (state != isp->otg.state) | |
1077 | pr_debug(" isp, %s -> %s\n", | |
1078 | state_string(state), state_name(isp)); | |
1079 | ||
1080 | #ifdef CONFIG_USB_OTG | |
1081 | /* update the OTG controller state to match the isp1301; may | |
1082 | * trigger OPRT_CHG irqs for changes going to the isp1301. | |
1083 | */ | |
1084 | update_otg1(isp, isp_stat); | |
1085 | update_otg2(isp, isp_bstat); | |
1086 | check_state(isp, __FUNCTION__); | |
1087 | #endif | |
1088 | ||
1089 | dump_regs(isp, "isp1301->otg"); | |
1090 | } | |
1091 | ||
1092 | /*-------------------------------------------------------------------------*/ | |
1093 | ||
1094 | static u8 isp1301_clear_latch(struct isp1301 *isp) | |
1095 | { | |
1096 | u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); | |
1097 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); | |
1098 | return latch; | |
1099 | } | |
1100 | ||
1101 | static void | |
25da383d | 1102 | isp1301_work(struct work_struct *work) |
1da177e4 | 1103 | { |
25da383d | 1104 | struct isp1301 *isp = container_of(work, struct isp1301, work); |
1da177e4 LT |
1105 | int stop; |
1106 | ||
1107 | /* implicit lock: we're the only task using this device */ | |
1108 | isp->working = 1; | |
1109 | do { | |
1110 | stop = test_bit(WORK_STOP, &isp->todo); | |
1111 | ||
1112 | #ifdef CONFIG_USB_OTG | |
1113 | /* transfer state from otg engine to isp1301 */ | |
1114 | if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { | |
1115 | otg_update_isp(isp); | |
1116 | put_device(&isp->client.dev); | |
1117 | } | |
1118 | #endif | |
1119 | /* transfer state from isp1301 to otg engine */ | |
1120 | if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { | |
1121 | u8 stat = isp1301_clear_latch(isp); | |
1122 | ||
1123 | isp_update_otg(isp, stat); | |
1124 | put_device(&isp->client.dev); | |
1125 | } | |
1126 | ||
1127 | if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { | |
1128 | u32 otg_ctrl; | |
1129 | ||
1130 | /* | |
1131 | * skip A_WAIT_VRISE; hc transitions invisibly | |
1132 | * skip A_WAIT_BCON; same. | |
1133 | */ | |
1134 | switch (isp->otg.state) { | |
1135 | case OTG_STATE_A_WAIT_BCON: | |
1136 | case OTG_STATE_A_WAIT_VRISE: | |
1137 | isp->otg.state = OTG_STATE_A_HOST; | |
1138 | pr_debug(" --> a_host\n"); | |
1139 | otg_ctrl = OTG_CTRL_REG; | |
1140 | otg_ctrl |= OTG_A_BUSREQ; | |
1141 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
1142 | & OTG_CTRL_MASK; | |
1143 | OTG_CTRL_REG = otg_ctrl; | |
1144 | break; | |
1145 | case OTG_STATE_B_WAIT_ACON: | |
1146 | isp->otg.state = OTG_STATE_B_HOST; | |
1147 | pr_debug(" --> b_host (acon)\n"); | |
1148 | break; | |
1149 | case OTG_STATE_B_HOST: | |
1150 | case OTG_STATE_B_IDLE: | |
1151 | case OTG_STATE_A_IDLE: | |
1152 | break; | |
1153 | default: | |
1154 | pr_debug(" host resume in %s\n", | |
1155 | state_name(isp)); | |
1156 | } | |
1157 | host_resume(isp); | |
1158 | // mdelay(10); | |
1159 | put_device(&isp->client.dev); | |
1160 | } | |
1161 | ||
1162 | if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { | |
1163 | #ifdef VERBOSE | |
1164 | dump_regs(isp, "timer"); | |
1165 | if (!stop) | |
1166 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1167 | #endif | |
1168 | put_device(&isp->client.dev); | |
1169 | } | |
1170 | ||
1171 | if (isp->todo) | |
1172 | dev_vdbg(&isp->client.dev, | |
1173 | "work done, todo = 0x%lx\n", | |
1174 | isp->todo); | |
1175 | if (stop) { | |
1176 | dev_dbg(&isp->client.dev, "stop\n"); | |
1177 | break; | |
1178 | } | |
1179 | } while (isp->todo); | |
1180 | isp->working = 0; | |
1181 | } | |
1182 | ||
7d12e780 | 1183 | static irqreturn_t isp1301_irq(int irq, void *isp) |
1da177e4 LT |
1184 | { |
1185 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
1186 | return IRQ_HANDLED; | |
1187 | } | |
1188 | ||
1189 | static void isp1301_timer(unsigned long _isp) | |
1190 | { | |
1191 | isp1301_defer_work((void *)_isp, WORK_TIMER); | |
1192 | } | |
1193 | ||
1194 | /*-------------------------------------------------------------------------*/ | |
1195 | ||
1196 | static void isp1301_release(struct device *dev) | |
1197 | { | |
1198 | struct isp1301 *isp; | |
1199 | ||
1200 | isp = container_of(dev, struct isp1301, client.dev); | |
1201 | ||
1202 | /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ | |
1203 | if (isp->i2c_release) | |
1204 | isp->i2c_release(dev); | |
1205 | kfree (isp); | |
1206 | } | |
1207 | ||
1208 | static struct isp1301 *the_transceiver; | |
1209 | ||
1210 | static int isp1301_detach_client(struct i2c_client *i2c) | |
1211 | { | |
1212 | struct isp1301 *isp; | |
1213 | ||
1214 | isp = container_of(i2c, struct isp1301, client); | |
1215 | ||
1216 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1217 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1218 | free_irq(isp->irq, isp); | |
1219 | #ifdef CONFIG_USB_OTG | |
1220 | otg_unbind(isp); | |
1221 | #endif | |
1222 | if (machine_is_omap_h2()) | |
1223 | omap_free_gpio(2); | |
1224 | ||
1225 | isp->timer.data = 0; | |
1226 | set_bit(WORK_STOP, &isp->todo); | |
1227 | del_timer_sync(&isp->timer); | |
1228 | flush_scheduled_work(); | |
1229 | ||
1230 | put_device(&i2c->dev); | |
1231 | the_transceiver = 0; | |
1232 | ||
1233 | return i2c_detach_client(i2c); | |
1234 | } | |
1235 | ||
1236 | /*-------------------------------------------------------------------------*/ | |
1237 | ||
1238 | /* NOTE: three modes are possible here, only one of which | |
1239 | * will be standards-conformant on any given system: | |
1240 | * | |
1241 | * - OTG mode (dual-role), required if there's a Mini-AB connector | |
1242 | * - HOST mode, for when there's one or more A (host) connectors | |
1243 | * - DEVICE mode, for when there's a B/Mini-B (device) connector | |
1244 | * | |
1245 | * As a rule, you won't have an isp1301 chip unless it's there to | |
25da383d | 1246 | * support the OTG mode. Other modes help testing USB controllers |
1da177e4 LT |
1247 | * in isolation from (full) OTG support, or maybe so later board |
1248 | * revisions can help to support those feature. | |
1249 | */ | |
1250 | ||
1251 | #ifdef CONFIG_USB_OTG | |
1252 | ||
1253 | static int isp1301_otg_enable(struct isp1301 *isp) | |
1254 | { | |
1255 | power_up(isp); | |
1256 | otg_init(isp); | |
1257 | ||
1258 | /* NOTE: since we don't change this, this provides | |
1259 | * a few more interrupts than are strictly needed. | |
1260 | */ | |
1261 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1262 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1263 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1264 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 LT |
1265 | |
1266 | dev_info(&isp->client.dev, "ready for dual-role USB ...\n"); | |
1267 | ||
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | #endif | |
1272 | ||
1273 | /* add or disable the host device+driver */ | |
1274 | static int | |
1275 | isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host) | |
1276 | { | |
1277 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
1278 | ||
1279 | if (!otg || isp != the_transceiver) | |
1280 | return -ENODEV; | |
1281 | ||
1282 | if (!host) { | |
1283 | OTG_IRQ_EN_REG = 0; | |
1284 | power_down(isp); | |
1285 | isp->otg.host = 0; | |
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | #ifdef CONFIG_USB_OTG | |
1290 | isp->otg.host = host; | |
1291 | dev_dbg(&isp->client.dev, "registered host\n"); | |
1292 | host_suspend(isp); | |
1293 | if (isp->otg.gadget) | |
1294 | return isp1301_otg_enable(isp); | |
1295 | return 0; | |
1296 | ||
1297 | #elif !defined(CONFIG_USB_GADGET_OMAP) | |
1298 | // FIXME update its refcount | |
1299 | isp->otg.host = host; | |
1300 | ||
1301 | power_up(isp); | |
1302 | ||
1303 | if (machine_is_omap_h2()) | |
1304 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1305 | ||
1306 | dev_info(&isp->client.dev, "A-Host sessions ok\n"); | |
1307 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1308 | INTR_ID_GND); |
1da177e4 | 1309 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1310 | INTR_ID_GND); |
1da177e4 LT |
1311 | |
1312 | /* If this has a Mini-AB connector, this mode is highly | |
1313 | * nonstandard ... but can be handy for testing, especially with | |
1314 | * the Mini-A end of an OTG cable. (Or something nonstandard | |
1315 | * like MiniB-to-StandardB, maybe built with a gender mender.) | |
1316 | */ | |
1317 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); | |
1318 | ||
1319 | dump_regs(isp, __FUNCTION__); | |
1320 | ||
1321 | return 0; | |
1322 | ||
1323 | #else | |
1324 | dev_dbg(&isp->client.dev, "host sessions not allowed\n"); | |
1325 | return -EINVAL; | |
1326 | #endif | |
1327 | ||
1328 | } | |
1329 | ||
1330 | static int | |
1331 | isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) | |
1332 | { | |
1333 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
1334 | ||
1335 | if (!otg || isp != the_transceiver) | |
1336 | return -ENODEV; | |
1337 | ||
1338 | if (!gadget) { | |
1339 | OTG_IRQ_EN_REG = 0; | |
1340 | if (!isp->otg.default_a) | |
1341 | enable_vbus_draw(isp, 0); | |
1342 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
1343 | isp->otg.gadget = 0; | |
1344 | power_down(isp); | |
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | #ifdef CONFIG_USB_OTG | |
1349 | isp->otg.gadget = gadget; | |
1350 | dev_dbg(&isp->client.dev, "registered gadget\n"); | |
1351 | /* gadget driver may be suspended until vbus_connect () */ | |
1352 | if (isp->otg.host) | |
1353 | return isp1301_otg_enable(isp); | |
1354 | return 0; | |
1355 | ||
1356 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) | |
1357 | isp->otg.gadget = gadget; | |
1358 | // FIXME update its refcount | |
1359 | ||
1360 | OTG_CTRL_REG = (OTG_CTRL_REG & OTG_CTRL_MASK | |
1361 | & ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS)) | |
1362 | | OTG_ID; | |
1363 | power_up(isp); | |
1364 | isp->otg.state = OTG_STATE_B_IDLE; | |
1365 | ||
1366 | if (machine_is_omap_h2()) | |
1367 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1368 | ||
1369 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1370 | INTR_SESS_VLD); |
1da177e4 | 1371 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1372 | INTR_VBUS_VLD); |
1da177e4 LT |
1373 | dev_info(&isp->client.dev, "B-Peripheral sessions ok\n"); |
1374 | dump_regs(isp, __FUNCTION__); | |
1375 | ||
1376 | /* If this has a Mini-AB connector, this mode is highly | |
1377 | * nonstandard ... but can be handy for testing, so long | |
1378 | * as you don't plug a Mini-A cable into the jack. | |
1379 | */ | |
1380 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) | |
1381 | b_peripheral(isp); | |
1382 | ||
1383 | return 0; | |
1384 | ||
1385 | #else | |
1386 | dev_dbg(&isp->client.dev, "peripheral sessions not allowed\n"); | |
1387 | return -EINVAL; | |
1388 | #endif | |
1389 | } | |
1390 | ||
1391 | ||
1392 | /*-------------------------------------------------------------------------*/ | |
1393 | ||
1394 | static int | |
1395 | isp1301_set_power(struct otg_transceiver *dev, unsigned mA) | |
1396 | { | |
1397 | if (!the_transceiver) | |
1398 | return -ENODEV; | |
1399 | if (dev->state == OTG_STATE_B_PERIPHERAL) | |
1400 | enable_vbus_draw(the_transceiver, mA); | |
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | static int | |
1405 | isp1301_start_srp(struct otg_transceiver *dev) | |
1406 | { | |
1407 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1408 | u32 otg_ctrl; | |
1409 | ||
1410 | if (!dev || isp != the_transceiver | |
1411 | || isp->otg.state != OTG_STATE_B_IDLE) | |
1412 | return -ENODEV; | |
1413 | ||
1414 | otg_ctrl = OTG_CTRL_REG; | |
1415 | if (!(otg_ctrl & OTG_BSESSEND)) | |
1416 | return -EINVAL; | |
1417 | ||
1418 | otg_ctrl |= OTG_B_BUSREQ; | |
1419 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; | |
1420 | OTG_CTRL_REG = otg_ctrl; | |
1421 | isp->otg.state = OTG_STATE_B_SRP_INIT; | |
1422 | ||
1423 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), OTG_CTRL_REG); | |
1424 | #ifdef CONFIG_USB_OTG | |
1425 | check_state(isp, __FUNCTION__); | |
1426 | #endif | |
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | static int | |
1431 | isp1301_start_hnp(struct otg_transceiver *dev) | |
1432 | { | |
1433 | #ifdef CONFIG_USB_OTG | |
1434 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1435 | ||
1436 | if (!dev || isp != the_transceiver) | |
1437 | return -ENODEV; | |
1438 | if (isp->otg.default_a && (isp->otg.host == NULL | |
1439 | || !isp->otg.host->b_hnp_enable)) | |
1440 | return -ENOTCONN; | |
1441 | if (!isp->otg.default_a && (isp->otg.gadget == NULL | |
1442 | || !isp->otg.gadget->b_hnp_enable)) | |
1443 | return -ENOTCONN; | |
1444 | ||
1445 | /* We want hardware to manage most HNP protocol timings. | |
1446 | * So do this part as early as possible... | |
1447 | */ | |
1448 | switch (isp->otg.state) { | |
1449 | case OTG_STATE_B_HOST: | |
1450 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
1451 | /* caller will suspend next */ | |
1452 | break; | |
1453 | case OTG_STATE_A_HOST: | |
1454 | #if 0 | |
1455 | /* autoconnect mode avoids irq latency bugs */ | |
1456 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1457 | MC1_BDIS_ACON_EN); | |
1458 | #endif | |
1459 | /* caller must suspend then clear A_BUSREQ */ | |
1460 | usb_gadget_vbus_connect(isp->otg.gadget); | |
1461 | OTG_CTRL_REG |= OTG_A_SETB_HNPEN; | |
1462 | ||
1463 | break; | |
1464 | case OTG_STATE_A_PERIPHERAL: | |
1465 | /* initiated by B-Host suspend */ | |
1466 | break; | |
1467 | default: | |
1468 | return -EILSEQ; | |
1469 | } | |
1470 | pr_debug("otg: HNP %s, %06x ...\n", | |
1471 | state_name(isp), OTG_CTRL_REG); | |
1472 | check_state(isp, __FUNCTION__); | |
1473 | return 0; | |
1474 | #else | |
1475 | /* srp-only */ | |
1476 | return -EINVAL; | |
1477 | #endif | |
1478 | } | |
1479 | ||
1480 | /*-------------------------------------------------------------------------*/ | |
1481 | ||
1482 | /* no error returns, they'd just make bus scanning stop */ | |
1483 | static int isp1301_probe(struct i2c_adapter *bus, int address, int kind) | |
1484 | { | |
1485 | int status; | |
1486 | struct isp1301 *isp; | |
1487 | struct i2c_client *i2c; | |
1488 | ||
1489 | if (the_transceiver) | |
1490 | return 0; | |
1491 | ||
82ca76b6 | 1492 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
1da177e4 LT |
1493 | if (!isp) |
1494 | return 0; | |
1495 | ||
25da383d | 1496 | INIT_WORK(&isp->work, isp1301_work); |
1da177e4 LT |
1497 | init_timer(&isp->timer); |
1498 | isp->timer.function = isp1301_timer; | |
1499 | isp->timer.data = (unsigned long) isp; | |
1500 | ||
1501 | isp->irq = -1; | |
1502 | isp->client.addr = address; | |
1503 | i2c_set_clientdata(&isp->client, isp); | |
1504 | isp->client.adapter = bus; | |
1505 | isp->client.driver = &isp1301_driver; | |
1506 | strlcpy(isp->client.name, DRIVER_NAME, I2C_NAME_SIZE); | |
1507 | i2c = &isp->client; | |
1508 | ||
1509 | /* if this is a true probe, verify the chip ... */ | |
1510 | if (kind < 0) { | |
1511 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); | |
1512 | if (status != I2C_VENDOR_ID_PHILIPS) { | |
1513 | dev_dbg(&bus->dev, "addr %d not philips id: %d\n", | |
1514 | address, status); | |
1515 | goto fail1; | |
1516 | } | |
1517 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); | |
1518 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { | |
1519 | dev_dbg(&bus->dev, "%d not isp1301, %d\n", | |
1520 | address, status); | |
1521 | goto fail1; | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | status = i2c_attach_client(i2c); | |
1526 | if (status < 0) { | |
1527 | dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n", | |
1528 | DRIVER_NAME, address, status); | |
1529 | fail1: | |
1530 | kfree(isp); | |
1531 | return 0; | |
1532 | } | |
1533 | isp->i2c_release = i2c->dev.release; | |
1534 | i2c->dev.release = isp1301_release; | |
1535 | ||
1536 | /* initial development used chiprev 2.00 */ | |
1537 | status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); | |
1538 | dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", | |
1539 | status >> 8, status & 0xff); | |
1540 | ||
1541 | /* make like power-on reset */ | |
1542 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); | |
1543 | ||
1544 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); | |
1545 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); | |
1546 | ||
1547 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1548 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); | |
1549 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1550 | ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
1551 | ||
1552 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); | |
1553 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1554 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1555 | ||
1556 | #ifdef CONFIG_USB_OTG | |
1557 | status = otg_bind(isp); | |
1558 | if (status < 0) { | |
1559 | dev_dbg(&i2c->dev, "can't bind OTG\n"); | |
1560 | goto fail2; | |
1561 | } | |
1562 | #endif | |
1563 | ||
1564 | if (machine_is_omap_h2()) { | |
1565 | /* full speed signaling by default */ | |
1566 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1567 | MC1_SPEED_REG); | |
1568 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, | |
1569 | MC2_SPD_SUSP_CTRL); | |
1570 | ||
1571 | /* IRQ wired at M14 */ | |
1572 | omap_cfg_reg(M14_1510_GPIO2); | |
1573 | isp->irq = OMAP_GPIO_IRQ(2); | |
25da383d DB |
1574 | if (gpio_request(2, "isp1301") == 0) |
1575 | gpio_direction_input(2); | |
1576 | isp->irq_type = IRQF_TRIGGER_FALLING; | |
1da177e4 LT |
1577 | } |
1578 | ||
25da383d | 1579 | isp->irq_type |= IRQF_SAMPLE_RANDOM; |
1da177e4 | 1580 | status = request_irq(isp->irq, isp1301_irq, |
25da383d | 1581 | isp->irq_type, 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 |