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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> |
d1846b0e | 28 | #include <linux/gpio.h> |
5f848137 | 29 | #include <linux/usb/ch9.h> |
187426e6 | 30 | #include <linux/usb/gadget.h> |
1da177e4 | 31 | #include <linux/usb.h> |
3a16f7b4 | 32 | #include <linux/usb/otg.h> |
1da177e4 LT |
33 | #include <linux/i2c.h> |
34 | #include <linux/workqueue.h> | |
35 | ||
36 | #include <asm/irq.h> | |
d1846b0e DB |
37 | #include <asm/mach-types.h> |
38 | ||
ce491cf8 TL |
39 | #include <plat/usb.h> |
40 | #include <plat/mux.h> | |
1da177e4 LT |
41 | |
42 | ||
43 | #ifndef DEBUG | |
44 | #undef VERBOSE | |
45 | #endif | |
46 | ||
47 | ||
48 | #define DRIVER_VERSION "24 August 2004" | |
25da383d | 49 | #define DRIVER_NAME (isp1301_driver.driver.name) |
1da177e4 LT |
50 | |
51 | MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver"); | |
52 | MODULE_LICENSE("GPL"); | |
53 | ||
54 | struct isp1301 { | |
55 | struct otg_transceiver otg; | |
a5f08a32 | 56 | struct i2c_client *client; |
1da177e4 LT |
57 | void (*i2c_release)(struct device *dev); |
58 | ||
25da383d | 59 | int irq_type; |
1da177e4 LT |
60 | |
61 | u32 last_otg_ctrl; | |
62 | unsigned working:1; | |
63 | ||
64 | struct timer_list timer; | |
65 | ||
66 | /* use keventd context to change the state for us */ | |
67 | struct work_struct work; | |
25da383d | 68 | |
1da177e4 LT |
69 | unsigned long todo; |
70 | # define WORK_UPDATE_ISP 0 /* update ISP from OTG */ | |
71 | # define WORK_UPDATE_OTG 1 /* update OTG from ISP */ | |
72 | # define WORK_HOST_RESUME 4 /* resume host */ | |
73 | # define WORK_TIMER 6 /* timer fired */ | |
74 | # define WORK_STOP 7 /* don't resubmit */ | |
75 | }; | |
76 | ||
77 | ||
f35ae634 | 78 | /* bits in OTG_CTRL */ |
1da177e4 LT |
79 | |
80 | #define OTG_XCEIV_OUTPUTS \ | |
81 | (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) | |
82 | #define OTG_XCEIV_INPUTS \ | |
83 | (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) | |
84 | #define OTG_CTRL_BITS \ | |
85 | (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) | |
86 | /* and OTG_PULLUP is sometimes written */ | |
87 | ||
88 | #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ | |
89 | OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ | |
90 | OTG_CTRL_BITS) | |
91 | ||
92 | ||
93 | /*-------------------------------------------------------------------------*/ | |
94 | ||
1da177e4 LT |
95 | /* board-specific PM hooks */ |
96 | ||
d1846b0e | 97 | #if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3) |
1da177e4 LT |
98 | |
99 | #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE) | |
100 | ||
6d16bfb5 | 101 | #include <linux/i2c/tps65010.h> |
1da177e4 LT |
102 | |
103 | #else | |
104 | ||
105 | static inline int tps65010_set_vbus_draw(unsigned mA) | |
106 | { | |
107 | pr_debug("tps65010: draw %d mA (STUB)\n", mA); | |
108 | return 0; | |
109 | } | |
110 | ||
111 | #endif | |
112 | ||
113 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
114 | { | |
115 | int status = tps65010_set_vbus_draw(mA); | |
116 | if (status < 0) | |
117 | pr_debug(" VBUS %d mA error %d\n", mA, status); | |
118 | } | |
119 | ||
d77282c8 | 120 | #else |
d1846b0e DB |
121 | |
122 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
123 | { | |
124 | /* H4 controls this by DIP switch S2.4; no soft control. | |
125 | * ON means the charger is always enabled. Leave it OFF | |
126 | * unless the OTG port is used only in B-peripheral mode. | |
127 | */ | |
128 | } | |
129 | ||
d77282c8 AG |
130 | #endif |
131 | ||
d1846b0e DB |
132 | static void enable_vbus_source(struct isp1301 *isp) |
133 | { | |
134 | /* this board won't supply more than 8mA vbus power. | |
135 | * some boards can switch a 100ma "unit load" (or more). | |
136 | */ | |
137 | } | |
138 | ||
139 | ||
140 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
141 | static inline void notresponding(struct isp1301 *isp) | |
142 | { | |
143 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
144 | } | |
145 | ||
146 | ||
1da177e4 LT |
147 | /*-------------------------------------------------------------------------*/ |
148 | ||
1da177e4 LT |
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 | { | |
a5f08a32 | 156 | return i2c_smbus_read_byte_data(isp->client, reg + 0); |
1da177e4 LT |
157 | } |
158 | ||
159 | static inline int | |
160 | isp1301_get_u16(struct isp1301 *isp, u8 reg) | |
161 | { | |
a5f08a32 | 162 | return i2c_smbus_read_word_data(isp->client, reg); |
1da177e4 LT |
163 | } |
164 | ||
165 | static inline int | |
166 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
167 | { | |
a5f08a32 | 168 | return i2c_smbus_write_byte_data(isp->client, reg + 0, bits); |
1da177e4 LT |
169 | } |
170 | ||
171 | static inline int | |
172 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
173 | { | |
a5f08a32 | 174 | return i2c_smbus_write_byte_data(isp->client, reg + 1, bits); |
1da177e4 LT |
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 */ | |
f35ae634 TL |
189 | # define MC1_SPEED (1 << 0) |
190 | # define MC1_SUSPEND (1 << 1) | |
1da177e4 LT |
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 | ||
1da177e4 LT |
237 | static inline const char *state_name(struct isp1301 *isp) |
238 | { | |
3dacdf11 | 239 | return otg_state_string(isp->otg.state); |
1da177e4 LT |
240 | } |
241 | ||
1da177e4 LT |
242 | /*-------------------------------------------------------------------------*/ |
243 | ||
244 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; | |
245 | * not everything is guarded by board-specific checks, or even using | |
246 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. | |
247 | * | |
248 | * ALSO: this currently doesn't use ISP1301 low-power modes | |
249 | * while OTG is running. | |
250 | */ | |
251 | ||
252 | static void power_down(struct isp1301 *isp) | |
253 | { | |
254 | isp->otg.state = OTG_STATE_UNDEFINED; | |
255 | ||
256 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 257 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
1da177e4 LT |
258 | |
259 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); | |
260 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
261 | } | |
262 | ||
263 | static void power_up(struct isp1301 *isp) | |
264 | { | |
265 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 266 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
25da383d | 267 | |
1da177e4 LT |
268 | /* do this only when cpu is driving transceiver, |
269 | * so host won't see a low speed device... | |
270 | */ | |
271 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
272 | } | |
273 | ||
274 | #define NO_HOST_SUSPEND | |
275 | ||
276 | static int host_suspend(struct isp1301 *isp) | |
277 | { | |
278 | #ifdef NO_HOST_SUSPEND | |
279 | return 0; | |
280 | #else | |
281 | struct device *dev; | |
282 | ||
283 | if (!isp->otg.host) | |
284 | return -ENODEV; | |
285 | ||
286 | /* Currently ASSUMES only the OTG port matters; | |
287 | * other ports could be active... | |
288 | */ | |
289 | dev = isp->otg.host->controller; | |
290 | return dev->driver->suspend(dev, 3, 0); | |
291 | #endif | |
292 | } | |
293 | ||
294 | static int host_resume(struct isp1301 *isp) | |
295 | { | |
296 | #ifdef NO_HOST_SUSPEND | |
297 | return 0; | |
298 | #else | |
299 | struct device *dev; | |
300 | ||
301 | if (!isp->otg.host) | |
302 | return -ENODEV; | |
303 | ||
304 | dev = isp->otg.host->controller; | |
305 | return dev->driver->resume(dev, 0); | |
306 | #endif | |
307 | } | |
308 | ||
309 | static int gadget_suspend(struct isp1301 *isp) | |
310 | { | |
311 | isp->otg.gadget->b_hnp_enable = 0; | |
312 | isp->otg.gadget->a_hnp_support = 0; | |
313 | isp->otg.gadget->a_alt_hnp_support = 0; | |
314 | return usb_gadget_vbus_disconnect(isp->otg.gadget); | |
315 | } | |
316 | ||
317 | /*-------------------------------------------------------------------------*/ | |
318 | ||
319 | #define TIMER_MINUTES 10 | |
320 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) | |
321 | ||
322 | /* Almost all our I2C messaging comes from a work queue's task context. | |
323 | * NOTE: guaranteeing certain response times might mean we shouldn't | |
324 | * share keventd's work queue; a realtime task might be safest. | |
325 | */ | |
d1846b0e | 326 | static void isp1301_defer_work(struct isp1301 *isp, int work) |
1da177e4 LT |
327 | { |
328 | int status; | |
329 | ||
330 | if (isp && !test_and_set_bit(work, &isp->todo)) { | |
a5f08a32 | 331 | (void) get_device(&isp->client->dev); |
1da177e4 LT |
332 | status = schedule_work(&isp->work); |
333 | if (!status && !isp->working) | |
a5f08a32 | 334 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
335 | "work item %d may be lost\n", work); |
336 | } | |
337 | } | |
338 | ||
339 | /* called from irq handlers */ | |
340 | static void a_idle(struct isp1301 *isp, const char *tag) | |
341 | { | |
f35ae634 TL |
342 | u32 l; |
343 | ||
1da177e4 LT |
344 | if (isp->otg.state == OTG_STATE_A_IDLE) |
345 | return; | |
346 | ||
347 | isp->otg.default_a = 1; | |
348 | if (isp->otg.host) { | |
349 | isp->otg.host->is_b_host = 0; | |
350 | host_suspend(isp); | |
351 | } | |
352 | if (isp->otg.gadget) { | |
353 | isp->otg.gadget->is_a_peripheral = 1; | |
354 | gadget_suspend(isp); | |
355 | } | |
356 | isp->otg.state = OTG_STATE_A_IDLE; | |
f35ae634 TL |
357 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
358 | omap_writel(l, OTG_CTRL); | |
359 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
360 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
361 | } | |
362 | ||
363 | /* called from irq handlers */ | |
364 | static void b_idle(struct isp1301 *isp, const char *tag) | |
365 | { | |
f35ae634 TL |
366 | u32 l; |
367 | ||
1da177e4 LT |
368 | if (isp->otg.state == OTG_STATE_B_IDLE) |
369 | return; | |
370 | ||
371 | isp->otg.default_a = 0; | |
372 | if (isp->otg.host) { | |
373 | isp->otg.host->is_b_host = 1; | |
374 | host_suspend(isp); | |
375 | } | |
376 | if (isp->otg.gadget) { | |
377 | isp->otg.gadget->is_a_peripheral = 0; | |
378 | gadget_suspend(isp); | |
379 | } | |
380 | isp->otg.state = OTG_STATE_B_IDLE; | |
f35ae634 TL |
381 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
382 | omap_writel(l, OTG_CTRL); | |
383 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
384 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
385 | } | |
386 | ||
387 | static void | |
388 | dump_regs(struct isp1301 *isp, const char *label) | |
389 | { | |
390 | #ifdef DEBUG | |
391 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); | |
392 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
393 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
394 | ||
395 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", | |
f35ae634 | 396 | omap_readl(OTG_CTRL), label, state_name(isp), |
1da177e4 LT |
397 | ctrl, status, src); |
398 | /* mode control and irq enables don't change much */ | |
399 | #endif | |
400 | } | |
401 | ||
402 | /*-------------------------------------------------------------------------*/ | |
403 | ||
404 | #ifdef CONFIG_USB_OTG | |
405 | ||
406 | /* | |
407 | * The OMAP OTG controller handles most of the OTG state transitions. | |
408 | * | |
409 | * We translate isp1301 outputs (mostly voltage comparator status) into | |
410 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state | |
411 | * flags into isp1301 inputs ... and infer state transitions. | |
412 | */ | |
413 | ||
414 | #ifdef VERBOSE | |
415 | ||
416 | static void check_state(struct isp1301 *isp, const char *tag) | |
417 | { | |
418 | enum usb_otg_state state = OTG_STATE_UNDEFINED; | |
f35ae634 | 419 | u8 fsm = omap_readw(OTG_TEST) & 0x0ff; |
1da177e4 LT |
420 | unsigned extra = 0; |
421 | ||
422 | switch (fsm) { | |
423 | ||
424 | /* default-b */ | |
425 | case 0x0: | |
426 | state = OTG_STATE_B_IDLE; | |
427 | break; | |
428 | case 0x3: | |
429 | case 0x7: | |
430 | extra = 1; | |
431 | case 0x1: | |
432 | state = OTG_STATE_B_PERIPHERAL; | |
433 | break; | |
434 | case 0x11: | |
435 | state = OTG_STATE_B_SRP_INIT; | |
436 | break; | |
437 | ||
438 | /* extra dual-role default-b states */ | |
439 | case 0x12: | |
440 | case 0x13: | |
441 | case 0x16: | |
442 | extra = 1; | |
443 | case 0x17: | |
444 | state = OTG_STATE_B_WAIT_ACON; | |
445 | break; | |
446 | case 0x34: | |
447 | state = OTG_STATE_B_HOST; | |
448 | break; | |
449 | ||
450 | /* default-a */ | |
451 | case 0x36: | |
452 | state = OTG_STATE_A_IDLE; | |
453 | break; | |
454 | case 0x3c: | |
455 | state = OTG_STATE_A_WAIT_VFALL; | |
456 | break; | |
457 | case 0x7d: | |
458 | state = OTG_STATE_A_VBUS_ERR; | |
459 | break; | |
460 | case 0x9e: | |
461 | case 0x9f: | |
462 | extra = 1; | |
463 | case 0x89: | |
464 | state = OTG_STATE_A_PERIPHERAL; | |
465 | break; | |
466 | case 0xb7: | |
467 | state = OTG_STATE_A_WAIT_VRISE; | |
468 | break; | |
469 | case 0xb8: | |
470 | state = OTG_STATE_A_WAIT_BCON; | |
471 | break; | |
472 | case 0xb9: | |
473 | state = OTG_STATE_A_HOST; | |
474 | break; | |
475 | case 0xba: | |
476 | state = OTG_STATE_A_SUSPEND; | |
477 | break; | |
478 | default: | |
479 | break; | |
480 | } | |
481 | if (isp->otg.state == state && !extra) | |
482 | return; | |
483 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, | |
3dacdf11 | 484 | otg_state_string(state), fsm, state_name(isp), |
f35ae634 | 485 | omap_readl(OTG_CTRL)); |
1da177e4 LT |
486 | } |
487 | ||
488 | #else | |
489 | ||
490 | static inline void check_state(struct isp1301 *isp, const char *tag) { } | |
491 | ||
492 | #endif | |
493 | ||
494 | /* outputs from ISP1301_INTERRUPT_SOURCE */ | |
495 | static void update_otg1(struct isp1301 *isp, u8 int_src) | |
496 | { | |
497 | u32 otg_ctrl; | |
498 | ||
f35ae634 TL |
499 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
500 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
501 | otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); | |
502 | ||
1da177e4 LT |
503 | if (int_src & INTR_SESS_VLD) |
504 | otg_ctrl |= OTG_ASESSVLD; | |
505 | else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) { | |
506 | a_idle(isp, "vfall"); | |
507 | otg_ctrl &= ~OTG_CTRL_BITS; | |
508 | } | |
509 | if (int_src & INTR_VBUS_VLD) | |
510 | otg_ctrl |= OTG_VBUSVLD; | |
511 | if (int_src & INTR_ID_GND) { /* default-A */ | |
512 | if (isp->otg.state == OTG_STATE_B_IDLE | |
513 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
514 | a_idle(isp, "init"); | |
515 | return; | |
516 | } | |
517 | } else { /* default-B */ | |
518 | otg_ctrl |= OTG_ID; | |
519 | if (isp->otg.state == OTG_STATE_A_IDLE | |
520 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
521 | b_idle(isp, "init"); | |
522 | return; | |
523 | } | |
524 | } | |
f35ae634 | 525 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
526 | } |
527 | ||
528 | /* outputs from ISP1301_OTG_STATUS */ | |
529 | static void update_otg2(struct isp1301 *isp, u8 otg_status) | |
530 | { | |
531 | u32 otg_ctrl; | |
532 | ||
f35ae634 TL |
533 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
534 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
535 | otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND); | |
1da177e4 LT |
536 | if (otg_status & OTG_B_SESS_VLD) |
537 | otg_ctrl |= OTG_BSESSVLD; | |
538 | else if (otg_status & OTG_B_SESS_END) | |
539 | otg_ctrl |= OTG_BSESSEND; | |
f35ae634 | 540 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
541 | } |
542 | ||
543 | /* inputs going to ISP1301 */ | |
544 | static void otg_update_isp(struct isp1301 *isp) | |
545 | { | |
546 | u32 otg_ctrl, otg_change; | |
547 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; | |
548 | ||
f35ae634 | 549 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
550 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; |
551 | isp->last_otg_ctrl = otg_ctrl; | |
552 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; | |
553 | ||
554 | switch (isp->otg.state) { | |
555 | case OTG_STATE_B_IDLE: | |
556 | case OTG_STATE_B_PERIPHERAL: | |
557 | case OTG_STATE_B_SRP_INIT: | |
558 | if (!(otg_ctrl & OTG_PULLUP)) { | |
559 | // if (otg_ctrl & OTG_B_HNPEN) { | |
560 | if (isp->otg.gadget->b_hnp_enable) { | |
561 | isp->otg.state = OTG_STATE_B_WAIT_ACON; | |
562 | pr_debug(" --> b_wait_acon\n"); | |
563 | } | |
564 | goto pulldown; | |
565 | } | |
566 | pullup: | |
567 | set |= OTG1_DP_PULLUP; | |
568 | clr |= OTG1_DP_PULLDOWN; | |
569 | break; | |
570 | case OTG_STATE_A_SUSPEND: | |
571 | case OTG_STATE_A_PERIPHERAL: | |
572 | if (otg_ctrl & OTG_PULLUP) | |
573 | goto pullup; | |
574 | /* FALLTHROUGH */ | |
575 | // case OTG_STATE_B_WAIT_ACON: | |
576 | default: | |
577 | pulldown: | |
578 | set |= OTG1_DP_PULLDOWN; | |
579 | clr |= OTG1_DP_PULLUP; | |
580 | break; | |
581 | } | |
582 | ||
583 | # define toggle(OTG,ISP) do { \ | |
584 | if (otg_ctrl & OTG) set |= ISP; \ | |
585 | else clr |= ISP; \ | |
586 | } while (0) | |
587 | ||
588 | if (!(isp->otg.host)) | |
589 | otg_ctrl &= ~OTG_DRV_VBUS; | |
590 | ||
591 | switch (isp->otg.state) { | |
592 | case OTG_STATE_A_SUSPEND: | |
593 | if (otg_ctrl & OTG_DRV_VBUS) { | |
594 | set |= OTG1_VBUS_DRV; | |
595 | break; | |
596 | } | |
597 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ | |
598 | notresponding(isp); | |
599 | ||
600 | /* FALLTHROUGH */ | |
601 | case OTG_STATE_A_VBUS_ERR: | |
602 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
603 | pr_debug(" --> a_wait_vfall\n"); | |
604 | /* FALLTHROUGH */ | |
605 | case OTG_STATE_A_WAIT_VFALL: | |
606 | /* FIXME usbcore thinks port power is still on ... */ | |
607 | clr |= OTG1_VBUS_DRV; | |
608 | break; | |
609 | case OTG_STATE_A_IDLE: | |
610 | if (otg_ctrl & OTG_DRV_VBUS) { | |
611 | isp->otg.state = OTG_STATE_A_WAIT_VRISE; | |
612 | pr_debug(" --> a_wait_vrise\n"); | |
613 | } | |
614 | /* FALLTHROUGH */ | |
615 | default: | |
616 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); | |
617 | } | |
618 | ||
619 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); | |
620 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); | |
621 | ||
622 | # undef toggle | |
623 | ||
624 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); | |
625 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); | |
626 | ||
627 | /* HNP switch to host or peripheral; and SRP */ | |
628 | if (otg_change & OTG_PULLUP) { | |
f35ae634 TL |
629 | u32 l; |
630 | ||
1da177e4 LT |
631 | switch (isp->otg.state) { |
632 | case OTG_STATE_B_IDLE: | |
633 | if (clr & OTG1_DP_PULLUP) | |
634 | break; | |
635 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
636 | pr_debug(" --> b_peripheral\n"); | |
637 | break; | |
638 | case OTG_STATE_A_SUSPEND: | |
639 | if (clr & OTG1_DP_PULLUP) | |
640 | break; | |
641 | isp->otg.state = OTG_STATE_A_PERIPHERAL; | |
642 | pr_debug(" --> a_peripheral\n"); | |
643 | break; | |
644 | default: | |
645 | break; | |
646 | } | |
f35ae634 TL |
647 | l = omap_readl(OTG_CTRL); |
648 | l |= OTG_PULLUP; | |
649 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
650 | } |
651 | ||
08882d20 | 652 | check_state(isp, __func__); |
1da177e4 LT |
653 | dump_regs(isp, "otg->isp1301"); |
654 | } | |
655 | ||
7d12e780 | 656 | static irqreturn_t omap_otg_irq(int irq, void *_isp) |
1da177e4 | 657 | { |
f35ae634 | 658 | u16 otg_irq = omap_readw(OTG_IRQ_SRC); |
1da177e4 LT |
659 | u32 otg_ctrl; |
660 | int ret = IRQ_NONE; | |
661 | struct isp1301 *isp = _isp; | |
662 | ||
7c9d440e | 663 | /* update ISP1301 transceiver from OTG controller */ |
1da177e4 | 664 | if (otg_irq & OPRT_CHG) { |
f35ae634 | 665 | omap_writew(OPRT_CHG, OTG_IRQ_SRC); |
1da177e4 LT |
666 | isp1301_defer_work(isp, WORK_UPDATE_ISP); |
667 | ret = IRQ_HANDLED; | |
668 | ||
669 | /* SRP to become b_peripheral failed */ | |
670 | } else if (otg_irq & B_SRP_TMROUT) { | |
f35ae634 | 671 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL)); |
1da177e4 LT |
672 | notresponding(isp); |
673 | ||
674 | /* gadget drivers that care should monitor all kinds of | |
675 | * remote wakeup (SRP, normal) using their own timer | |
676 | * to give "check cable and A-device" messages. | |
677 | */ | |
678 | if (isp->otg.state == OTG_STATE_B_SRP_INIT) | |
679 | b_idle(isp, "srp_timeout"); | |
680 | ||
f35ae634 | 681 | omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
682 | ret = IRQ_HANDLED; |
683 | ||
684 | /* HNP to become b_host failed */ | |
685 | } else if (otg_irq & B_HNP_FAIL) { | |
686 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", | |
f35ae634 | 687 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
688 | notresponding(isp); |
689 | ||
f35ae634 | 690 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
691 | otg_ctrl |= OTG_BUSDROP; |
692 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 693 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
694 | |
695 | /* subset of b_peripheral()... */ | |
696 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
697 | pr_debug(" --> b_peripheral\n"); | |
698 | ||
f35ae634 | 699 | omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); |
1da177e4 LT |
700 | ret = IRQ_HANDLED; |
701 | ||
702 | /* detect SRP from B-device ... */ | |
703 | } else if (otg_irq & A_SRP_DETECT) { | |
704 | pr_debug("otg: %s SRP_DETECT, %06x\n", | |
f35ae634 | 705 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
706 | |
707 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
708 | switch (isp->otg.state) { | |
709 | case OTG_STATE_A_IDLE: | |
710 | if (!isp->otg.host) | |
711 | break; | |
712 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
f35ae634 | 713 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
714 | otg_ctrl |= OTG_A_BUSREQ; |
715 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
716 | & ~OTG_XCEIV_INPUTS | |
717 | & OTG_CTRL_MASK; | |
f35ae634 | 718 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
719 | break; |
720 | default: | |
721 | break; | |
722 | } | |
723 | ||
f35ae634 | 724 | omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); |
1da177e4 LT |
725 | ret = IRQ_HANDLED; |
726 | ||
727 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) | |
728 | * we don't track them separately | |
729 | */ | |
730 | } else if (otg_irq & A_REQ_TMROUT) { | |
f35ae634 | 731 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
732 | pr_info("otg: BCON_TMOUT from %s, %06x\n", |
733 | state_name(isp), otg_ctrl); | |
734 | notresponding(isp); | |
735 | ||
736 | otg_ctrl |= OTG_BUSDROP; | |
737 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 738 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
739 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; |
740 | ||
f35ae634 | 741 | omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
742 | ret = IRQ_HANDLED; |
743 | ||
744 | /* A-supplied voltage fell too low; overcurrent */ | |
745 | } else if (otg_irq & A_VBUS_ERR) { | |
f35ae634 | 746 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
747 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", |
748 | state_name(isp), otg_irq, otg_ctrl); | |
749 | ||
750 | otg_ctrl |= OTG_BUSDROP; | |
751 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 752 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
753 | isp->otg.state = OTG_STATE_A_VBUS_ERR; |
754 | ||
f35ae634 | 755 | omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); |
1da177e4 LT |
756 | ret = IRQ_HANDLED; |
757 | ||
7c9d440e | 758 | /* switch driver; the transceiver code activates it, |
1da177e4 LT |
759 | * ungating the udc clock or resuming OHCI. |
760 | */ | |
761 | } else if (otg_irq & DRIVER_SWITCH) { | |
762 | int kick = 0; | |
763 | ||
f35ae634 | 764 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
765 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", |
766 | state_name(isp), | |
767 | (otg_ctrl & OTG_DRIVER_SEL) | |
768 | ? "gadget" : "host", | |
769 | otg_ctrl); | |
770 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
771 | ||
772 | /* role is peripheral */ | |
773 | if (otg_ctrl & OTG_DRIVER_SEL) { | |
774 | switch (isp->otg.state) { | |
775 | case OTG_STATE_A_IDLE: | |
08882d20 | 776 | b_idle(isp, __func__); |
1da177e4 LT |
777 | break; |
778 | default: | |
779 | break; | |
780 | } | |
781 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
782 | ||
783 | /* role is host */ | |
784 | } else { | |
785 | if (!(otg_ctrl & OTG_ID)) { | |
25da383d | 786 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
f35ae634 | 787 | omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL); |
1da177e4 LT |
788 | } |
789 | ||
790 | if (isp->otg.host) { | |
791 | switch (isp->otg.state) { | |
792 | case OTG_STATE_B_WAIT_ACON: | |
793 | isp->otg.state = OTG_STATE_B_HOST; | |
794 | pr_debug(" --> b_host\n"); | |
795 | kick = 1; | |
796 | break; | |
797 | case OTG_STATE_A_WAIT_BCON: | |
798 | isp->otg.state = OTG_STATE_A_HOST; | |
799 | pr_debug(" --> a_host\n"); | |
800 | break; | |
801 | case OTG_STATE_A_PERIPHERAL: | |
802 | isp->otg.state = OTG_STATE_A_WAIT_BCON; | |
803 | pr_debug(" --> a_wait_bcon\n"); | |
804 | break; | |
805 | default: | |
806 | break; | |
807 | } | |
808 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
809 | } | |
810 | } | |
811 | ||
f35ae634 | 812 | omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); |
1da177e4 LT |
813 | ret = IRQ_HANDLED; |
814 | ||
815 | if (kick) | |
816 | usb_bus_start_enum(isp->otg.host, | |
817 | isp->otg.host->otg_port); | |
818 | } | |
819 | ||
08882d20 | 820 | check_state(isp, __func__); |
1da177e4 LT |
821 | return ret; |
822 | } | |
823 | ||
824 | static struct platform_device *otg_dev; | |
825 | ||
465f8294 | 826 | static int isp1301_otg_init(struct isp1301 *isp) |
1da177e4 | 827 | { |
f35ae634 TL |
828 | u32 l; |
829 | ||
1da177e4 LT |
830 | if (!otg_dev) |
831 | return -ENODEV; | |
832 | ||
08882d20 | 833 | dump_regs(isp, __func__); |
1da177e4 | 834 | /* some of these values are board-specific... */ |
f35ae634 TL |
835 | l = omap_readl(OTG_SYSCON_2); |
836 | l |= OTG_EN | |
1da177e4 LT |
837 | /* for B-device: */ |
838 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ | |
839 | | SRP_GPDVBUS /* discharge after VBUS pulse */ | |
840 | // | (3 << 24) /* 2msec VBUS pulse */ | |
841 | /* for A-device: */ | |
842 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ | |
843 | | SRP_DPW /* detect 167+ns SRP pulses */ | |
844 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ | |
845 | ; | |
f35ae634 | 846 | omap_writel(l, OTG_SYSCON_2); |
1da177e4 LT |
847 | |
848 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
849 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
850 | ||
08882d20 | 851 | check_state(isp, __func__); |
1da177e4 | 852 | pr_debug("otg: %s, %s %06x\n", |
f35ae634 | 853 | state_name(isp), __func__, omap_readl(OTG_CTRL)); |
1da177e4 | 854 | |
f35ae634 | 855 | omap_writew(DRIVER_SWITCH | OPRT_CHG |
1da177e4 | 856 | | B_SRP_TMROUT | B_HNP_FAIL |
f35ae634 TL |
857 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN); |
858 | ||
859 | l = omap_readl(OTG_SYSCON_2); | |
860 | l |= OTG_EN; | |
861 | omap_writel(l, OTG_SYSCON_2); | |
1da177e4 LT |
862 | |
863 | return 0; | |
864 | } | |
865 | ||
3ae5eaec | 866 | static int otg_probe(struct platform_device *dev) |
1da177e4 LT |
867 | { |
868 | // struct omap_usb_config *config = dev->platform_data; | |
869 | ||
3ae5eaec | 870 | otg_dev = dev; |
1da177e4 LT |
871 | return 0; |
872 | } | |
873 | ||
3ae5eaec | 874 | static int otg_remove(struct platform_device *dev) |
1da177e4 | 875 | { |
d1846b0e | 876 | otg_dev = NULL; |
1da177e4 LT |
877 | return 0; |
878 | } | |
879 | ||
d1846b0e | 880 | static struct platform_driver omap_otg_driver = { |
1da177e4 | 881 | .probe = otg_probe, |
3ae5eaec RK |
882 | .remove = otg_remove, |
883 | .driver = { | |
884 | .owner = THIS_MODULE, | |
885 | .name = "omap_otg", | |
886 | }, | |
1da177e4 LT |
887 | }; |
888 | ||
889 | static int otg_bind(struct isp1301 *isp) | |
890 | { | |
891 | int status; | |
892 | ||
893 | if (otg_dev) | |
894 | return -EBUSY; | |
895 | ||
3ae5eaec | 896 | status = platform_driver_register(&omap_otg_driver); |
1da177e4 LT |
897 | if (status < 0) |
898 | return status; | |
899 | ||
900 | if (otg_dev) | |
901 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, | |
dace1453 | 902 | IRQF_DISABLED, DRIVER_NAME, isp); |
1da177e4 LT |
903 | else |
904 | status = -ENODEV; | |
905 | ||
906 | if (status < 0) | |
3ae5eaec | 907 | platform_driver_unregister(&omap_otg_driver); |
1da177e4 LT |
908 | return status; |
909 | } | |
910 | ||
911 | static void otg_unbind(struct isp1301 *isp) | |
912 | { | |
913 | if (!otg_dev) | |
914 | return; | |
915 | free_irq(otg_dev->resource[1].start, isp); | |
916 | } | |
917 | ||
918 | #else | |
919 | ||
920 | /* OTG controller isn't clocked */ | |
921 | ||
922 | #endif /* CONFIG_USB_OTG */ | |
923 | ||
924 | /*-------------------------------------------------------------------------*/ | |
925 | ||
926 | static void b_peripheral(struct isp1301 *isp) | |
927 | { | |
f35ae634 TL |
928 | u32 l; |
929 | ||
930 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; | |
931 | omap_writel(l, OTG_CTRL); | |
932 | ||
1da177e4 LT |
933 | usb_gadget_vbus_connect(isp->otg.gadget); |
934 | ||
935 | #ifdef CONFIG_USB_OTG | |
936 | enable_vbus_draw(isp, 8); | |
937 | otg_update_isp(isp); | |
938 | #else | |
939 | enable_vbus_draw(isp, 100); | |
940 | /* UDC driver just set OTG_BSESSVLD */ | |
941 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); | |
942 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); | |
943 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
944 | pr_debug(" --> b_peripheral\n"); | |
945 | dump_regs(isp, "2periph"); | |
946 | #endif | |
947 | } | |
948 | ||
949 | static void isp_update_otg(struct isp1301 *isp, u8 stat) | |
950 | { | |
951 | u8 isp_stat, isp_bstat; | |
952 | enum usb_otg_state state = isp->otg.state; | |
953 | ||
954 | if (stat & INTR_BDIS_ACON) | |
955 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); | |
956 | ||
957 | /* start certain state transitions right away */ | |
958 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
959 | if (isp_stat & INTR_ID_GND) { | |
960 | if (isp->otg.default_a) { | |
961 | switch (state) { | |
962 | case OTG_STATE_B_IDLE: | |
963 | a_idle(isp, "idle"); | |
964 | /* FALLTHROUGH */ | |
965 | case OTG_STATE_A_IDLE: | |
966 | enable_vbus_source(isp); | |
967 | /* FALLTHROUGH */ | |
968 | case OTG_STATE_A_WAIT_VRISE: | |
969 | /* we skip over OTG_STATE_A_WAIT_BCON, since | |
970 | * the HC will transition to A_HOST (or | |
971 | * A_SUSPEND!) without our noticing except | |
972 | * when HNP is used. | |
973 | */ | |
974 | if (isp_stat & INTR_VBUS_VLD) | |
975 | isp->otg.state = OTG_STATE_A_HOST; | |
976 | break; | |
977 | case OTG_STATE_A_WAIT_VFALL: | |
978 | if (!(isp_stat & INTR_SESS_VLD)) | |
979 | a_idle(isp, "vfell"); | |
980 | break; | |
981 | default: | |
982 | if (!(isp_stat & INTR_VBUS_VLD)) | |
983 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
984 | break; | |
985 | } | |
986 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
987 | } else { | |
988 | switch (state) { | |
989 | case OTG_STATE_B_PERIPHERAL: | |
990 | case OTG_STATE_B_HOST: | |
991 | case OTG_STATE_B_WAIT_ACON: | |
992 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
993 | break; | |
994 | default: | |
995 | break; | |
996 | } | |
997 | if (state != OTG_STATE_A_IDLE) | |
998 | a_idle(isp, "id"); | |
999 | if (isp->otg.host && state == OTG_STATE_A_IDLE) | |
1000 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
1001 | isp_bstat = 0; | |
1002 | } | |
1003 | } else { | |
f35ae634 TL |
1004 | u32 l; |
1005 | ||
1da177e4 LT |
1006 | /* if user unplugged mini-A end of cable, |
1007 | * don't bypass A_WAIT_VFALL. | |
1008 | */ | |
1009 | if (isp->otg.default_a) { | |
1010 | switch (state) { | |
1011 | default: | |
1012 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
1013 | break; | |
1014 | case OTG_STATE_A_WAIT_VFALL: | |
1015 | state = OTG_STATE_A_IDLE; | |
1016 | /* khubd may take a while to notice and | |
1017 | * handle this disconnect, so don't go | |
1018 | * to B_IDLE quite yet. | |
1019 | */ | |
1020 | break; | |
1021 | case OTG_STATE_A_IDLE: | |
1022 | host_suspend(isp); | |
1023 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, | |
1024 | MC1_BDIS_ACON_EN); | |
1025 | isp->otg.state = OTG_STATE_B_IDLE; | |
f35ae634 TL |
1026 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1027 | l &= ~OTG_CTRL_BITS; | |
1028 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1029 | break; |
1030 | case OTG_STATE_B_IDLE: | |
1031 | break; | |
1032 | } | |
1033 | } | |
1034 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1035 | ||
1036 | switch (isp->otg.state) { | |
1037 | case OTG_STATE_B_PERIPHERAL: | |
1038 | case OTG_STATE_B_WAIT_ACON: | |
1039 | case OTG_STATE_B_HOST: | |
1040 | if (likely(isp_bstat & OTG_B_SESS_VLD)) | |
1041 | break; | |
1042 | enable_vbus_draw(isp, 0); | |
1043 | #ifndef CONFIG_USB_OTG | |
1044 | /* UDC driver will clear OTG_BSESSVLD */ | |
1045 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1046 | OTG1_DP_PULLDOWN); | |
1047 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1048 | OTG1_DP_PULLUP); | |
08882d20 | 1049 | dump_regs(isp, __func__); |
1da177e4 LT |
1050 | #endif |
1051 | /* FALLTHROUGH */ | |
1052 | case OTG_STATE_B_SRP_INIT: | |
08882d20 | 1053 | b_idle(isp, __func__); |
f35ae634 TL |
1054 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
1055 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
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", | |
3dacdf11 | 1078 | otg_state_string(state), state_name(isp)); |
1da177e4 LT |
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); | |
08882d20 | 1086 | check_state(isp, __func__); |
1da177e4 LT |
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); | |
a5f08a32 | 1116 | put_device(&isp->client->dev); |
1da177e4 LT |
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); | |
a5f08a32 | 1124 | put_device(&isp->client->dev); |
1da177e4 LT |
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"); | |
f35ae634 | 1139 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1140 | otg_ctrl |= OTG_A_BUSREQ; |
1141 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
1142 | & OTG_CTRL_MASK; | |
f35ae634 | 1143 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
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); | |
a5f08a32 | 1159 | put_device(&isp->client->dev); |
1da177e4 LT |
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 | |
a5f08a32 | 1168 | put_device(&isp->client->dev); |
1da177e4 LT |
1169 | } |
1170 | ||
1171 | if (isp->todo) | |
a5f08a32 | 1172 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
1173 | "work done, todo = 0x%lx\n", |
1174 | isp->todo); | |
1175 | if (stop) { | |
a5f08a32 | 1176 | dev_dbg(&isp->client->dev, "stop\n"); |
1da177e4 LT |
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 | ||
a5f08a32 | 1200 | isp = dev_get_drvdata(dev); |
1da177e4 | 1201 | |
d1846b0e DB |
1202 | /* FIXME -- not with a "new style" driver, it doesn't!! */ |
1203 | ||
1da177e4 LT |
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 | ||
9df013b3 | 1212 | static int __exit isp1301_remove(struct i2c_client *i2c) |
1da177e4 LT |
1213 | { |
1214 | struct isp1301 *isp; | |
1215 | ||
a5f08a32 | 1216 | isp = i2c_get_clientdata(i2c); |
1da177e4 LT |
1217 | |
1218 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1219 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
9df013b3 | 1220 | free_irq(i2c->irq, isp); |
1da177e4 LT |
1221 | #ifdef CONFIG_USB_OTG |
1222 | otg_unbind(isp); | |
1223 | #endif | |
1224 | if (machine_is_omap_h2()) | |
d1846b0e | 1225 | gpio_free(2); |
1da177e4 LT |
1226 | |
1227 | isp->timer.data = 0; | |
1228 | set_bit(WORK_STOP, &isp->todo); | |
1229 | del_timer_sync(&isp->timer); | |
569ff2de | 1230 | flush_work_sync(&isp->work); |
1da177e4 LT |
1231 | |
1232 | put_device(&i2c->dev); | |
d1846b0e | 1233 | the_transceiver = NULL; |
1da177e4 | 1234 | |
9df013b3 | 1235 | return 0; |
1da177e4 LT |
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 | |
25da383d | 1248 | * support the OTG mode. Other modes help testing USB controllers |
1da177e4 LT |
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); | |
465f8294 | 1258 | isp1301_otg_init(isp); |
1da177e4 LT |
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, | |
25da383d | 1264 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1265 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1266 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1267 | |
a5f08a32 | 1268 | dev_info(&isp->client->dev, "ready for dual-role USB ...\n"); |
1da177e4 LT |
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) { | |
f35ae634 | 1285 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 | 1286 | power_down(isp); |
d1846b0e | 1287 | isp->otg.host = NULL; |
1da177e4 LT |
1288 | return 0; |
1289 | } | |
1290 | ||
1291 | #ifdef CONFIG_USB_OTG | |
1292 | isp->otg.host = host; | |
a5f08a32 | 1293 | dev_dbg(&isp->client->dev, "registered host\n"); |
1da177e4 LT |
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 | ||
a5f08a32 | 1308 | dev_info(&isp->client->dev, "A-Host sessions ok\n"); |
1da177e4 | 1309 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, |
25da383d | 1310 | INTR_ID_GND); |
1da177e4 | 1311 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1312 | INTR_ID_GND); |
1da177e4 LT |
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 | ||
08882d20 | 1321 | dump_regs(isp, __func__); |
1da177e4 LT |
1322 | |
1323 | return 0; | |
1324 | ||
1325 | #else | |
a5f08a32 | 1326 | dev_dbg(&isp->client->dev, "host sessions not allowed\n"); |
1da177e4 LT |
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); | |
d1846b0e | 1336 | #ifndef CONFIG_USB_OTG |
f35ae634 | 1337 | u32 l; |
d1846b0e | 1338 | #endif |
1da177e4 LT |
1339 | |
1340 | if (!otg || isp != the_transceiver) | |
1341 | return -ENODEV; | |
1342 | ||
1343 | if (!gadget) { | |
f35ae634 | 1344 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 LT |
1345 | if (!isp->otg.default_a) |
1346 | enable_vbus_draw(isp, 0); | |
1347 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
d1846b0e | 1348 | isp->otg.gadget = NULL; |
1da177e4 LT |
1349 | power_down(isp); |
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | #ifdef CONFIG_USB_OTG | |
1354 | isp->otg.gadget = gadget; | |
a5f08a32 | 1355 | dev_dbg(&isp->client->dev, "registered gadget\n"); |
1da177e4 LT |
1356 | /* gadget driver may be suspended until vbus_connect () */ |
1357 | if (isp->otg.host) | |
1358 | return isp1301_otg_enable(isp); | |
1359 | return 0; | |
1360 | ||
1361 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) | |
1362 | isp->otg.gadget = gadget; | |
1363 | // FIXME update its refcount | |
1364 | ||
f35ae634 TL |
1365 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1366 | l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS); | |
1367 | l |= OTG_ID; | |
1368 | omap_writel(l, OTG_CTRL); | |
1369 | ||
1da177e4 LT |
1370 | power_up(isp); |
1371 | isp->otg.state = OTG_STATE_B_IDLE; | |
1372 | ||
d1846b0e | 1373 | if (machine_is_omap_h2() || machine_is_omap_h3()) |
1da177e4 LT |
1374 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); |
1375 | ||
1376 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1377 | INTR_SESS_VLD); |
1da177e4 | 1378 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1379 | INTR_VBUS_VLD); |
a5f08a32 | 1380 | dev_info(&isp->client->dev, "B-Peripheral sessions ok\n"); |
08882d20 | 1381 | dump_regs(isp, __func__); |
1da177e4 LT |
1382 | |
1383 | /* If this has a Mini-AB connector, this mode is highly | |
1384 | * nonstandard ... but can be handy for testing, so long | |
1385 | * as you don't plug a Mini-A cable into the jack. | |
1386 | */ | |
1387 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) | |
1388 | b_peripheral(isp); | |
1389 | ||
1390 | return 0; | |
1391 | ||
1392 | #else | |
a5f08a32 | 1393 | dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n"); |
1da177e4 LT |
1394 | return -EINVAL; |
1395 | #endif | |
1396 | } | |
1397 | ||
1398 | ||
1399 | /*-------------------------------------------------------------------------*/ | |
1400 | ||
1401 | static int | |
1402 | isp1301_set_power(struct otg_transceiver *dev, unsigned mA) | |
1403 | { | |
1404 | if (!the_transceiver) | |
1405 | return -ENODEV; | |
1406 | if (dev->state == OTG_STATE_B_PERIPHERAL) | |
1407 | enable_vbus_draw(the_transceiver, mA); | |
1408 | return 0; | |
1409 | } | |
1410 | ||
1411 | static int | |
1412 | isp1301_start_srp(struct otg_transceiver *dev) | |
1413 | { | |
1414 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1415 | u32 otg_ctrl; | |
1416 | ||
1417 | if (!dev || isp != the_transceiver | |
1418 | || isp->otg.state != OTG_STATE_B_IDLE) | |
1419 | return -ENODEV; | |
1420 | ||
f35ae634 | 1421 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1422 | if (!(otg_ctrl & OTG_BSESSEND)) |
1423 | return -EINVAL; | |
1424 | ||
1425 | otg_ctrl |= OTG_B_BUSREQ; | |
1426 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; | |
f35ae634 | 1427 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
1428 | isp->otg.state = OTG_STATE_B_SRP_INIT; |
1429 | ||
f35ae634 TL |
1430 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), |
1431 | omap_readl(OTG_CTRL)); | |
1da177e4 | 1432 | #ifdef CONFIG_USB_OTG |
08882d20 | 1433 | check_state(isp, __func__); |
1da177e4 LT |
1434 | #endif |
1435 | return 0; | |
1436 | } | |
1437 | ||
1438 | static int | |
1439 | isp1301_start_hnp(struct otg_transceiver *dev) | |
1440 | { | |
1441 | #ifdef CONFIG_USB_OTG | |
1442 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
f35ae634 | 1443 | u32 l; |
1da177e4 LT |
1444 | |
1445 | if (!dev || isp != the_transceiver) | |
1446 | return -ENODEV; | |
1447 | if (isp->otg.default_a && (isp->otg.host == NULL | |
1448 | || !isp->otg.host->b_hnp_enable)) | |
1449 | return -ENOTCONN; | |
1450 | if (!isp->otg.default_a && (isp->otg.gadget == NULL | |
1451 | || !isp->otg.gadget->b_hnp_enable)) | |
1452 | return -ENOTCONN; | |
1453 | ||
1454 | /* We want hardware to manage most HNP protocol timings. | |
1455 | * So do this part as early as possible... | |
1456 | */ | |
1457 | switch (isp->otg.state) { | |
1458 | case OTG_STATE_B_HOST: | |
1459 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
1460 | /* caller will suspend next */ | |
1461 | break; | |
1462 | case OTG_STATE_A_HOST: | |
1463 | #if 0 | |
1464 | /* autoconnect mode avoids irq latency bugs */ | |
1465 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1466 | MC1_BDIS_ACON_EN); | |
1467 | #endif | |
1468 | /* caller must suspend then clear A_BUSREQ */ | |
1469 | usb_gadget_vbus_connect(isp->otg.gadget); | |
f35ae634 TL |
1470 | l = omap_readl(OTG_CTRL); |
1471 | l |= OTG_A_SETB_HNPEN; | |
1472 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1473 | |
1474 | break; | |
1475 | case OTG_STATE_A_PERIPHERAL: | |
1476 | /* initiated by B-Host suspend */ | |
1477 | break; | |
1478 | default: | |
1479 | return -EILSEQ; | |
1480 | } | |
1481 | pr_debug("otg: HNP %s, %06x ...\n", | |
f35ae634 | 1482 | state_name(isp), omap_readl(OTG_CTRL)); |
08882d20 | 1483 | check_state(isp, __func__); |
1da177e4 LT |
1484 | return 0; |
1485 | #else | |
1486 | /* srp-only */ | |
1487 | return -EINVAL; | |
1488 | #endif | |
1489 | } | |
1490 | ||
1491 | /*-------------------------------------------------------------------------*/ | |
1492 | ||
a7e2a89a | 1493 | static int __devinit |
d1846b0e | 1494 | isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id) |
1da177e4 LT |
1495 | { |
1496 | int status; | |
1497 | struct isp1301 *isp; | |
1da177e4 LT |
1498 | |
1499 | if (the_transceiver) | |
1500 | return 0; | |
1501 | ||
82ca76b6 | 1502 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
1da177e4 LT |
1503 | if (!isp) |
1504 | return 0; | |
1505 | ||
25da383d | 1506 | INIT_WORK(&isp->work, isp1301_work); |
1da177e4 LT |
1507 | init_timer(&isp->timer); |
1508 | isp->timer.function = isp1301_timer; | |
1509 | isp->timer.data = (unsigned long) isp; | |
1510 | ||
9df013b3 JD |
1511 | i2c_set_clientdata(i2c, isp); |
1512 | isp->client = i2c; | |
1da177e4 | 1513 | |
25985edc | 1514 | /* verify the chip (shouldn't be necessary) */ |
9df013b3 JD |
1515 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); |
1516 | if (status != I2C_VENDOR_ID_PHILIPS) { | |
1517 | dev_dbg(&i2c->dev, "not philips id: %d\n", status); | |
1518 | goto fail; | |
1519 | } | |
1520 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); | |
1521 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { | |
1522 | dev_dbg(&i2c->dev, "not isp1301, %d\n", status); | |
1523 | goto fail; | |
1da177e4 LT |
1524 | } |
1525 | isp->i2c_release = i2c->dev.release; | |
1526 | i2c->dev.release = isp1301_release; | |
1527 | ||
1528 | /* initial development used chiprev 2.00 */ | |
1529 | status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); | |
1530 | dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", | |
1531 | status >> 8, status & 0xff); | |
1532 | ||
1533 | /* make like power-on reset */ | |
1534 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); | |
1535 | ||
1536 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); | |
1537 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); | |
1538 | ||
1539 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1540 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); | |
1541 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1542 | ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
1543 | ||
1544 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); | |
1545 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1546 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1547 | ||
1548 | #ifdef CONFIG_USB_OTG | |
1549 | status = otg_bind(isp); | |
1550 | if (status < 0) { | |
1551 | dev_dbg(&i2c->dev, "can't bind OTG\n"); | |
9df013b3 | 1552 | goto fail; |
1da177e4 LT |
1553 | } |
1554 | #endif | |
1555 | ||
1556 | if (machine_is_omap_h2()) { | |
1557 | /* full speed signaling by default */ | |
1558 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
cbbcb9b0 | 1559 | MC1_SPEED); |
1da177e4 LT |
1560 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, |
1561 | MC2_SPD_SUSP_CTRL); | |
1562 | ||
1563 | /* IRQ wired at M14 */ | |
1564 | omap_cfg_reg(M14_1510_GPIO2); | |
25da383d DB |
1565 | if (gpio_request(2, "isp1301") == 0) |
1566 | gpio_direction_input(2); | |
1567 | isp->irq_type = IRQF_TRIGGER_FALLING; | |
1da177e4 LT |
1568 | } |
1569 | ||
25da383d | 1570 | isp->irq_type |= IRQF_SAMPLE_RANDOM; |
9df013b3 | 1571 | status = request_irq(i2c->irq, isp1301_irq, |
25da383d | 1572 | isp->irq_type, DRIVER_NAME, isp); |
1da177e4 LT |
1573 | if (status < 0) { |
1574 | dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", | |
9df013b3 JD |
1575 | i2c->irq, status); |
1576 | goto fail; | |
1da177e4 LT |
1577 | } |
1578 | ||
9df013b3 | 1579 | isp->otg.dev = &i2c->dev; |
1da177e4 LT |
1580 | isp->otg.label = DRIVER_NAME; |
1581 | ||
1582 | isp->otg.set_host = isp1301_set_host, | |
1583 | isp->otg.set_peripheral = isp1301_set_peripheral, | |
1584 | isp->otg.set_power = isp1301_set_power, | |
1585 | isp->otg.start_srp = isp1301_start_srp, | |
1586 | isp->otg.start_hnp = isp1301_start_hnp, | |
1587 | ||
1588 | enable_vbus_draw(isp, 0); | |
1589 | power_down(isp); | |
1590 | the_transceiver = isp; | |
1591 | ||
1592 | #ifdef CONFIG_USB_OTG | |
1593 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
1594 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
1595 | #endif | |
1596 | ||
08882d20 | 1597 | dump_regs(isp, __func__); |
1da177e4 LT |
1598 | |
1599 | #ifdef VERBOSE | |
1600 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1601 | dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); | |
1602 | #endif | |
1603 | ||
1604 | status = otg_set_transceiver(&isp->otg); | |
1605 | if (status < 0) | |
1606 | dev_err(&i2c->dev, "can't register transceiver, %d\n", | |
1607 | status); | |
1608 | ||
1609 | return 0; | |
1da177e4 | 1610 | |
9df013b3 JD |
1611 | fail: |
1612 | kfree(isp); | |
1613 | return -ENODEV; | |
1da177e4 LT |
1614 | } |
1615 | ||
9df013b3 JD |
1616 | static const struct i2c_device_id isp1301_id[] = { |
1617 | { "isp1301_omap", 0 }, | |
1618 | { } | |
1619 | }; | |
1620 | MODULE_DEVICE_TABLE(i2c, isp1301_id); | |
1621 | ||
1da177e4 | 1622 | static struct i2c_driver isp1301_driver = { |
a9718b0c | 1623 | .driver = { |
a9718b0c LR |
1624 | .name = "isp1301_omap", |
1625 | }, | |
9df013b3 JD |
1626 | .probe = isp1301_probe, |
1627 | .remove = __exit_p(isp1301_remove), | |
1628 | .id_table = isp1301_id, | |
1da177e4 LT |
1629 | }; |
1630 | ||
1631 | /*-------------------------------------------------------------------------*/ | |
1632 | ||
1633 | static int __init isp_init(void) | |
1634 | { | |
1635 | return i2c_add_driver(&isp1301_driver); | |
1636 | } | |
94a82487 | 1637 | subsys_initcall(isp_init); |
1da177e4 LT |
1638 | |
1639 | static void __exit isp_exit(void) | |
1640 | { | |
1641 | if (the_transceiver) | |
d1846b0e | 1642 | otg_set_transceiver(NULL); |
1da177e4 LT |
1643 | i2c_del_driver(&isp1301_driver); |
1644 | } | |
1645 | module_exit(isp_exit); | |
1646 |