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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> | |
a09e64fb | 36 | #include <mach/usb.h> |
1da177e4 LT |
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; | |
a5f08a32 | 52 | struct i2c_client *client; |
1da177e4 LT |
53 | void (*i2c_release)(struct device *dev); |
54 | ||
25da383d | 55 | int irq_type; |
1da177e4 LT |
56 | |
57 | u32 last_otg_ctrl; | |
58 | unsigned working:1; | |
59 | ||
60 | struct timer_list timer; | |
61 | ||
62 | /* use keventd context to change the state for us */ | |
63 | struct work_struct work; | |
25da383d | 64 | |
1da177e4 LT |
65 | unsigned long todo; |
66 | # define WORK_UPDATE_ISP 0 /* update ISP from OTG */ | |
67 | # define WORK_UPDATE_OTG 1 /* update OTG from ISP */ | |
68 | # define WORK_HOST_RESUME 4 /* resume host */ | |
69 | # define WORK_TIMER 6 /* timer fired */ | |
70 | # define WORK_STOP 7 /* don't resubmit */ | |
71 | }; | |
72 | ||
73 | ||
f35ae634 | 74 | /* bits in OTG_CTRL */ |
1da177e4 LT |
75 | |
76 | #define OTG_XCEIV_OUTPUTS \ | |
77 | (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) | |
78 | #define OTG_XCEIV_INPUTS \ | |
79 | (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) | |
80 | #define OTG_CTRL_BITS \ | |
81 | (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) | |
82 | /* and OTG_PULLUP is sometimes written */ | |
83 | ||
84 | #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ | |
85 | OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ | |
86 | OTG_CTRL_BITS) | |
87 | ||
88 | ||
89 | /*-------------------------------------------------------------------------*/ | |
90 | ||
91 | #ifdef CONFIG_MACH_OMAP_H2 | |
92 | ||
93 | /* board-specific PM hooks */ | |
94 | ||
25da383d | 95 | #include <asm/gpio.h> |
a09e64fb | 96 | #include <mach/mux.h> |
1da177e4 LT |
97 | #include <asm/mach-types.h> |
98 | ||
99 | ||
100 | #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE) | |
101 | ||
6d16bfb5 | 102 | #include <linux/i2c/tps65010.h> |
1da177e4 LT |
103 | |
104 | #else | |
105 | ||
106 | static inline int tps65010_set_vbus_draw(unsigned mA) | |
107 | { | |
108 | pr_debug("tps65010: draw %d mA (STUB)\n", mA); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | #endif | |
113 | ||
114 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
115 | { | |
116 | int status = tps65010_set_vbus_draw(mA); | |
117 | if (status < 0) | |
118 | pr_debug(" VBUS %d mA error %d\n", mA, status); | |
119 | } | |
120 | ||
121 | static void enable_vbus_source(struct isp1301 *isp) | |
122 | { | |
123 | /* this board won't supply more than 8mA vbus power. | |
124 | * some boards can switch a 100ma "unit load" (or more). | |
125 | */ | |
126 | } | |
127 | ||
128 | ||
129 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
130 | static inline void notresponding(struct isp1301 *isp) | |
131 | { | |
132 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
133 | } | |
134 | ||
135 | ||
136 | #endif | |
137 | ||
138 | /*-------------------------------------------------------------------------*/ | |
139 | ||
1da177e4 LT |
140 | static struct i2c_driver isp1301_driver; |
141 | ||
142 | /* smbus apis are used for portability */ | |
143 | ||
144 | static inline u8 | |
145 | isp1301_get_u8(struct isp1301 *isp, u8 reg) | |
146 | { | |
a5f08a32 | 147 | return i2c_smbus_read_byte_data(isp->client, reg + 0); |
1da177e4 LT |
148 | } |
149 | ||
150 | static inline int | |
151 | isp1301_get_u16(struct isp1301 *isp, u8 reg) | |
152 | { | |
a5f08a32 | 153 | return i2c_smbus_read_word_data(isp->client, reg); |
1da177e4 LT |
154 | } |
155 | ||
156 | static inline int | |
157 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
158 | { | |
a5f08a32 | 159 | return i2c_smbus_write_byte_data(isp->client, reg + 0, bits); |
1da177e4 LT |
160 | } |
161 | ||
162 | static inline int | |
163 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
164 | { | |
a5f08a32 | 165 | return i2c_smbus_write_byte_data(isp->client, reg + 1, bits); |
1da177e4 LT |
166 | } |
167 | ||
168 | /*-------------------------------------------------------------------------*/ | |
169 | ||
170 | /* identification */ | |
171 | #define ISP1301_VENDOR_ID 0x00 /* u16 read */ | |
172 | #define ISP1301_PRODUCT_ID 0x02 /* u16 read */ | |
173 | #define ISP1301_BCD_DEVICE 0x14 /* u16 read */ | |
174 | ||
175 | #define I2C_VENDOR_ID_PHILIPS 0x04cc | |
176 | #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 | |
177 | ||
178 | /* operational registers */ | |
179 | #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ | |
f35ae634 TL |
180 | # define MC1_SPEED (1 << 0) |
181 | # define MC1_SUSPEND (1 << 1) | |
1da177e4 LT |
182 | # define MC1_DAT_SE0 (1 << 2) |
183 | # define MC1_TRANSPARENT (1 << 3) | |
184 | # define MC1_BDIS_ACON_EN (1 << 4) | |
185 | # define MC1_OE_INT_EN (1 << 5) | |
186 | # define MC1_UART_EN (1 << 6) | |
187 | # define MC1_MASK 0x7f | |
188 | #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ | |
189 | # define MC2_GLOBAL_PWR_DN (1 << 0) | |
190 | # define MC2_SPD_SUSP_CTRL (1 << 1) | |
191 | # define MC2_BI_DI (1 << 2) | |
192 | # define MC2_TRANSP_BDIR0 (1 << 3) | |
193 | # define MC2_TRANSP_BDIR1 (1 << 4) | |
194 | # define MC2_AUDIO_EN (1 << 5) | |
195 | # define MC2_PSW_EN (1 << 6) | |
196 | # define MC2_EN2V7 (1 << 7) | |
197 | #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ | |
198 | # define OTG1_DP_PULLUP (1 << 0) | |
199 | # define OTG1_DM_PULLUP (1 << 1) | |
200 | # define OTG1_DP_PULLDOWN (1 << 2) | |
201 | # define OTG1_DM_PULLDOWN (1 << 3) | |
202 | # define OTG1_ID_PULLDOWN (1 << 4) | |
203 | # define OTG1_VBUS_DRV (1 << 5) | |
204 | # define OTG1_VBUS_DISCHRG (1 << 6) | |
205 | # define OTG1_VBUS_CHRG (1 << 7) | |
206 | #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ | |
207 | # define OTG_B_SESS_END (1 << 6) | |
208 | # define OTG_B_SESS_VLD (1 << 7) | |
209 | ||
210 | #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ | |
211 | #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ | |
212 | ||
213 | #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ | |
214 | #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ | |
215 | ||
216 | /* same bitfields in all interrupt registers */ | |
217 | # define INTR_VBUS_VLD (1 << 0) | |
218 | # define INTR_SESS_VLD (1 << 1) | |
219 | # define INTR_DP_HI (1 << 2) | |
220 | # define INTR_ID_GND (1 << 3) | |
221 | # define INTR_DM_HI (1 << 4) | |
222 | # define INTR_ID_FLOAT (1 << 5) | |
223 | # define INTR_BDIS_ACON (1 << 6) | |
224 | # define INTR_CR_INT (1 << 7) | |
225 | ||
226 | /*-------------------------------------------------------------------------*/ | |
227 | ||
228 | static const char *state_string(enum usb_otg_state state) | |
229 | { | |
230 | switch (state) { | |
231 | case OTG_STATE_A_IDLE: return "a_idle"; | |
232 | case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; | |
233 | case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; | |
234 | case OTG_STATE_A_HOST: return "a_host"; | |
235 | case OTG_STATE_A_SUSPEND: return "a_suspend"; | |
236 | case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; | |
237 | case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; | |
238 | case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; | |
239 | case OTG_STATE_B_IDLE: return "b_idle"; | |
240 | case OTG_STATE_B_SRP_INIT: return "b_srp_init"; | |
241 | case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; | |
242 | case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; | |
243 | case OTG_STATE_B_HOST: return "b_host"; | |
244 | default: return "UNDEFINED"; | |
245 | } | |
246 | } | |
247 | ||
248 | static inline const char *state_name(struct isp1301 *isp) | |
249 | { | |
250 | return state_string(isp->otg.state); | |
251 | } | |
252 | ||
1da177e4 LT |
253 | /*-------------------------------------------------------------------------*/ |
254 | ||
255 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; | |
256 | * not everything is guarded by board-specific checks, or even using | |
257 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. | |
258 | * | |
259 | * ALSO: this currently doesn't use ISP1301 low-power modes | |
260 | * while OTG is running. | |
261 | */ | |
262 | ||
263 | static void power_down(struct isp1301 *isp) | |
264 | { | |
265 | isp->otg.state = OTG_STATE_UNDEFINED; | |
266 | ||
267 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 268 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
1da177e4 LT |
269 | |
270 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); | |
271 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
272 | } | |
273 | ||
274 | static void power_up(struct isp1301 *isp) | |
275 | { | |
276 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 277 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
25da383d | 278 | |
1da177e4 LT |
279 | /* do this only when cpu is driving transceiver, |
280 | * so host won't see a low speed device... | |
281 | */ | |
282 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
283 | } | |
284 | ||
285 | #define NO_HOST_SUSPEND | |
286 | ||
287 | static int host_suspend(struct isp1301 *isp) | |
288 | { | |
289 | #ifdef NO_HOST_SUSPEND | |
290 | return 0; | |
291 | #else | |
292 | struct device *dev; | |
293 | ||
294 | if (!isp->otg.host) | |
295 | return -ENODEV; | |
296 | ||
297 | /* Currently ASSUMES only the OTG port matters; | |
298 | * other ports could be active... | |
299 | */ | |
300 | dev = isp->otg.host->controller; | |
301 | return dev->driver->suspend(dev, 3, 0); | |
302 | #endif | |
303 | } | |
304 | ||
305 | static int host_resume(struct isp1301 *isp) | |
306 | { | |
307 | #ifdef NO_HOST_SUSPEND | |
308 | return 0; | |
309 | #else | |
310 | struct device *dev; | |
311 | ||
312 | if (!isp->otg.host) | |
313 | return -ENODEV; | |
314 | ||
315 | dev = isp->otg.host->controller; | |
316 | return dev->driver->resume(dev, 0); | |
317 | #endif | |
318 | } | |
319 | ||
320 | static int gadget_suspend(struct isp1301 *isp) | |
321 | { | |
322 | isp->otg.gadget->b_hnp_enable = 0; | |
323 | isp->otg.gadget->a_hnp_support = 0; | |
324 | isp->otg.gadget->a_alt_hnp_support = 0; | |
325 | return usb_gadget_vbus_disconnect(isp->otg.gadget); | |
326 | } | |
327 | ||
328 | /*-------------------------------------------------------------------------*/ | |
329 | ||
330 | #define TIMER_MINUTES 10 | |
331 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) | |
332 | ||
333 | /* Almost all our I2C messaging comes from a work queue's task context. | |
334 | * NOTE: guaranteeing certain response times might mean we shouldn't | |
335 | * share keventd's work queue; a realtime task might be safest. | |
336 | */ | |
337 | void | |
338 | isp1301_defer_work(struct isp1301 *isp, int work) | |
339 | { | |
340 | int status; | |
341 | ||
342 | if (isp && !test_and_set_bit(work, &isp->todo)) { | |
a5f08a32 | 343 | (void) get_device(&isp->client->dev); |
1da177e4 LT |
344 | status = schedule_work(&isp->work); |
345 | if (!status && !isp->working) | |
a5f08a32 | 346 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
347 | "work item %d may be lost\n", work); |
348 | } | |
349 | } | |
350 | ||
351 | /* called from irq handlers */ | |
352 | static void a_idle(struct isp1301 *isp, const char *tag) | |
353 | { | |
f35ae634 TL |
354 | u32 l; |
355 | ||
1da177e4 LT |
356 | if (isp->otg.state == OTG_STATE_A_IDLE) |
357 | return; | |
358 | ||
359 | isp->otg.default_a = 1; | |
360 | if (isp->otg.host) { | |
361 | isp->otg.host->is_b_host = 0; | |
362 | host_suspend(isp); | |
363 | } | |
364 | if (isp->otg.gadget) { | |
365 | isp->otg.gadget->is_a_peripheral = 1; | |
366 | gadget_suspend(isp); | |
367 | } | |
368 | isp->otg.state = OTG_STATE_A_IDLE; | |
f35ae634 TL |
369 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
370 | omap_writel(l, OTG_CTRL); | |
371 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
372 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
373 | } | |
374 | ||
375 | /* called from irq handlers */ | |
376 | static void b_idle(struct isp1301 *isp, const char *tag) | |
377 | { | |
f35ae634 TL |
378 | u32 l; |
379 | ||
1da177e4 LT |
380 | if (isp->otg.state == OTG_STATE_B_IDLE) |
381 | return; | |
382 | ||
383 | isp->otg.default_a = 0; | |
384 | if (isp->otg.host) { | |
385 | isp->otg.host->is_b_host = 1; | |
386 | host_suspend(isp); | |
387 | } | |
388 | if (isp->otg.gadget) { | |
389 | isp->otg.gadget->is_a_peripheral = 0; | |
390 | gadget_suspend(isp); | |
391 | } | |
392 | isp->otg.state = OTG_STATE_B_IDLE; | |
f35ae634 TL |
393 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
394 | omap_writel(l, OTG_CTRL); | |
395 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
396 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
397 | } | |
398 | ||
399 | static void | |
400 | dump_regs(struct isp1301 *isp, const char *label) | |
401 | { | |
402 | #ifdef DEBUG | |
403 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); | |
404 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
405 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
406 | ||
407 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", | |
f35ae634 | 408 | omap_readl(OTG_CTRL), label, state_name(isp), |
1da177e4 LT |
409 | ctrl, status, src); |
410 | /* mode control and irq enables don't change much */ | |
411 | #endif | |
412 | } | |
413 | ||
414 | /*-------------------------------------------------------------------------*/ | |
415 | ||
416 | #ifdef CONFIG_USB_OTG | |
417 | ||
418 | /* | |
419 | * The OMAP OTG controller handles most of the OTG state transitions. | |
420 | * | |
421 | * We translate isp1301 outputs (mostly voltage comparator status) into | |
422 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state | |
423 | * flags into isp1301 inputs ... and infer state transitions. | |
424 | */ | |
425 | ||
426 | #ifdef VERBOSE | |
427 | ||
428 | static void check_state(struct isp1301 *isp, const char *tag) | |
429 | { | |
430 | enum usb_otg_state state = OTG_STATE_UNDEFINED; | |
f35ae634 | 431 | u8 fsm = omap_readw(OTG_TEST) & 0x0ff; |
1da177e4 LT |
432 | unsigned extra = 0; |
433 | ||
434 | switch (fsm) { | |
435 | ||
436 | /* default-b */ | |
437 | case 0x0: | |
438 | state = OTG_STATE_B_IDLE; | |
439 | break; | |
440 | case 0x3: | |
441 | case 0x7: | |
442 | extra = 1; | |
443 | case 0x1: | |
444 | state = OTG_STATE_B_PERIPHERAL; | |
445 | break; | |
446 | case 0x11: | |
447 | state = OTG_STATE_B_SRP_INIT; | |
448 | break; | |
449 | ||
450 | /* extra dual-role default-b states */ | |
451 | case 0x12: | |
452 | case 0x13: | |
453 | case 0x16: | |
454 | extra = 1; | |
455 | case 0x17: | |
456 | state = OTG_STATE_B_WAIT_ACON; | |
457 | break; | |
458 | case 0x34: | |
459 | state = OTG_STATE_B_HOST; | |
460 | break; | |
461 | ||
462 | /* default-a */ | |
463 | case 0x36: | |
464 | state = OTG_STATE_A_IDLE; | |
465 | break; | |
466 | case 0x3c: | |
467 | state = OTG_STATE_A_WAIT_VFALL; | |
468 | break; | |
469 | case 0x7d: | |
470 | state = OTG_STATE_A_VBUS_ERR; | |
471 | break; | |
472 | case 0x9e: | |
473 | case 0x9f: | |
474 | extra = 1; | |
475 | case 0x89: | |
476 | state = OTG_STATE_A_PERIPHERAL; | |
477 | break; | |
478 | case 0xb7: | |
479 | state = OTG_STATE_A_WAIT_VRISE; | |
480 | break; | |
481 | case 0xb8: | |
482 | state = OTG_STATE_A_WAIT_BCON; | |
483 | break; | |
484 | case 0xb9: | |
485 | state = OTG_STATE_A_HOST; | |
486 | break; | |
487 | case 0xba: | |
488 | state = OTG_STATE_A_SUSPEND; | |
489 | break; | |
490 | default: | |
491 | break; | |
492 | } | |
493 | if (isp->otg.state == state && !extra) | |
494 | return; | |
495 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, | |
f35ae634 TL |
496 | state_string(state), fsm, state_name(isp), |
497 | omap_readl(OTG_CTRL)); | |
1da177e4 LT |
498 | } |
499 | ||
500 | #else | |
501 | ||
502 | static inline void check_state(struct isp1301 *isp, const char *tag) { } | |
503 | ||
504 | #endif | |
505 | ||
506 | /* outputs from ISP1301_INTERRUPT_SOURCE */ | |
507 | static void update_otg1(struct isp1301 *isp, u8 int_src) | |
508 | { | |
509 | u32 otg_ctrl; | |
510 | ||
f35ae634 TL |
511 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
512 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
513 | otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); | |
514 | ||
515 | ||
1da177e4 LT |
516 | if (int_src & INTR_SESS_VLD) |
517 | otg_ctrl |= OTG_ASESSVLD; | |
518 | else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) { | |
519 | a_idle(isp, "vfall"); | |
520 | otg_ctrl &= ~OTG_CTRL_BITS; | |
521 | } | |
522 | if (int_src & INTR_VBUS_VLD) | |
523 | otg_ctrl |= OTG_VBUSVLD; | |
524 | if (int_src & INTR_ID_GND) { /* default-A */ | |
525 | if (isp->otg.state == OTG_STATE_B_IDLE | |
526 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
527 | a_idle(isp, "init"); | |
528 | return; | |
529 | } | |
530 | } else { /* default-B */ | |
531 | otg_ctrl |= OTG_ID; | |
532 | if (isp->otg.state == OTG_STATE_A_IDLE | |
533 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
534 | b_idle(isp, "init"); | |
535 | return; | |
536 | } | |
537 | } | |
f35ae634 | 538 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
539 | } |
540 | ||
541 | /* outputs from ISP1301_OTG_STATUS */ | |
542 | static void update_otg2(struct isp1301 *isp, u8 otg_status) | |
543 | { | |
544 | u32 otg_ctrl; | |
545 | ||
f35ae634 TL |
546 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
547 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
548 | otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND); | |
1da177e4 LT |
549 | if (otg_status & OTG_B_SESS_VLD) |
550 | otg_ctrl |= OTG_BSESSVLD; | |
551 | else if (otg_status & OTG_B_SESS_END) | |
552 | otg_ctrl |= OTG_BSESSEND; | |
f35ae634 | 553 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
554 | } |
555 | ||
556 | /* inputs going to ISP1301 */ | |
557 | static void otg_update_isp(struct isp1301 *isp) | |
558 | { | |
559 | u32 otg_ctrl, otg_change; | |
560 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; | |
561 | ||
f35ae634 | 562 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
563 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; |
564 | isp->last_otg_ctrl = otg_ctrl; | |
565 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; | |
566 | ||
567 | switch (isp->otg.state) { | |
568 | case OTG_STATE_B_IDLE: | |
569 | case OTG_STATE_B_PERIPHERAL: | |
570 | case OTG_STATE_B_SRP_INIT: | |
571 | if (!(otg_ctrl & OTG_PULLUP)) { | |
572 | // if (otg_ctrl & OTG_B_HNPEN) { | |
573 | if (isp->otg.gadget->b_hnp_enable) { | |
574 | isp->otg.state = OTG_STATE_B_WAIT_ACON; | |
575 | pr_debug(" --> b_wait_acon\n"); | |
576 | } | |
577 | goto pulldown; | |
578 | } | |
579 | pullup: | |
580 | set |= OTG1_DP_PULLUP; | |
581 | clr |= OTG1_DP_PULLDOWN; | |
582 | break; | |
583 | case OTG_STATE_A_SUSPEND: | |
584 | case OTG_STATE_A_PERIPHERAL: | |
585 | if (otg_ctrl & OTG_PULLUP) | |
586 | goto pullup; | |
587 | /* FALLTHROUGH */ | |
588 | // case OTG_STATE_B_WAIT_ACON: | |
589 | default: | |
590 | pulldown: | |
591 | set |= OTG1_DP_PULLDOWN; | |
592 | clr |= OTG1_DP_PULLUP; | |
593 | break; | |
594 | } | |
595 | ||
596 | # define toggle(OTG,ISP) do { \ | |
597 | if (otg_ctrl & OTG) set |= ISP; \ | |
598 | else clr |= ISP; \ | |
599 | } while (0) | |
600 | ||
601 | if (!(isp->otg.host)) | |
602 | otg_ctrl &= ~OTG_DRV_VBUS; | |
603 | ||
604 | switch (isp->otg.state) { | |
605 | case OTG_STATE_A_SUSPEND: | |
606 | if (otg_ctrl & OTG_DRV_VBUS) { | |
607 | set |= OTG1_VBUS_DRV; | |
608 | break; | |
609 | } | |
610 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ | |
611 | notresponding(isp); | |
612 | ||
613 | /* FALLTHROUGH */ | |
614 | case OTG_STATE_A_VBUS_ERR: | |
615 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
616 | pr_debug(" --> a_wait_vfall\n"); | |
617 | /* FALLTHROUGH */ | |
618 | case OTG_STATE_A_WAIT_VFALL: | |
619 | /* FIXME usbcore thinks port power is still on ... */ | |
620 | clr |= OTG1_VBUS_DRV; | |
621 | break; | |
622 | case OTG_STATE_A_IDLE: | |
623 | if (otg_ctrl & OTG_DRV_VBUS) { | |
624 | isp->otg.state = OTG_STATE_A_WAIT_VRISE; | |
625 | pr_debug(" --> a_wait_vrise\n"); | |
626 | } | |
627 | /* FALLTHROUGH */ | |
628 | default: | |
629 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); | |
630 | } | |
631 | ||
632 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); | |
633 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); | |
634 | ||
635 | # undef toggle | |
636 | ||
637 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); | |
638 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); | |
639 | ||
640 | /* HNP switch to host or peripheral; and SRP */ | |
641 | if (otg_change & OTG_PULLUP) { | |
f35ae634 TL |
642 | u32 l; |
643 | ||
1da177e4 LT |
644 | switch (isp->otg.state) { |
645 | case OTG_STATE_B_IDLE: | |
646 | if (clr & OTG1_DP_PULLUP) | |
647 | break; | |
648 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
649 | pr_debug(" --> b_peripheral\n"); | |
650 | break; | |
651 | case OTG_STATE_A_SUSPEND: | |
652 | if (clr & OTG1_DP_PULLUP) | |
653 | break; | |
654 | isp->otg.state = OTG_STATE_A_PERIPHERAL; | |
655 | pr_debug(" --> a_peripheral\n"); | |
656 | break; | |
657 | default: | |
658 | break; | |
659 | } | |
f35ae634 TL |
660 | l = omap_readl(OTG_CTRL); |
661 | l |= OTG_PULLUP; | |
662 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
663 | } |
664 | ||
08882d20 | 665 | check_state(isp, __func__); |
1da177e4 LT |
666 | dump_regs(isp, "otg->isp1301"); |
667 | } | |
668 | ||
7d12e780 | 669 | static irqreturn_t omap_otg_irq(int irq, void *_isp) |
1da177e4 | 670 | { |
f35ae634 | 671 | u16 otg_irq = omap_readw(OTG_IRQ_SRC); |
1da177e4 LT |
672 | u32 otg_ctrl; |
673 | int ret = IRQ_NONE; | |
674 | struct isp1301 *isp = _isp; | |
675 | ||
676 | /* update ISP1301 transciever from OTG controller */ | |
677 | if (otg_irq & OPRT_CHG) { | |
f35ae634 | 678 | omap_writew(OPRT_CHG, OTG_IRQ_SRC); |
1da177e4 LT |
679 | isp1301_defer_work(isp, WORK_UPDATE_ISP); |
680 | ret = IRQ_HANDLED; | |
681 | ||
682 | /* SRP to become b_peripheral failed */ | |
683 | } else if (otg_irq & B_SRP_TMROUT) { | |
f35ae634 | 684 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL)); |
1da177e4 LT |
685 | notresponding(isp); |
686 | ||
687 | /* gadget drivers that care should monitor all kinds of | |
688 | * remote wakeup (SRP, normal) using their own timer | |
689 | * to give "check cable and A-device" messages. | |
690 | */ | |
691 | if (isp->otg.state == OTG_STATE_B_SRP_INIT) | |
692 | b_idle(isp, "srp_timeout"); | |
693 | ||
f35ae634 | 694 | omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
695 | ret = IRQ_HANDLED; |
696 | ||
697 | /* HNP to become b_host failed */ | |
698 | } else if (otg_irq & B_HNP_FAIL) { | |
699 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", | |
f35ae634 | 700 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
701 | notresponding(isp); |
702 | ||
f35ae634 | 703 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
704 | otg_ctrl |= OTG_BUSDROP; |
705 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 706 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
707 | |
708 | /* subset of b_peripheral()... */ | |
709 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
710 | pr_debug(" --> b_peripheral\n"); | |
711 | ||
f35ae634 | 712 | omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); |
1da177e4 LT |
713 | ret = IRQ_HANDLED; |
714 | ||
715 | /* detect SRP from B-device ... */ | |
716 | } else if (otg_irq & A_SRP_DETECT) { | |
717 | pr_debug("otg: %s SRP_DETECT, %06x\n", | |
f35ae634 | 718 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
719 | |
720 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
721 | switch (isp->otg.state) { | |
722 | case OTG_STATE_A_IDLE: | |
723 | if (!isp->otg.host) | |
724 | break; | |
725 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
f35ae634 | 726 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
727 | otg_ctrl |= OTG_A_BUSREQ; |
728 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
729 | & ~OTG_XCEIV_INPUTS | |
730 | & OTG_CTRL_MASK; | |
f35ae634 | 731 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
732 | break; |
733 | default: | |
734 | break; | |
735 | } | |
736 | ||
f35ae634 | 737 | omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); |
1da177e4 LT |
738 | ret = IRQ_HANDLED; |
739 | ||
740 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) | |
741 | * we don't track them separately | |
742 | */ | |
743 | } else if (otg_irq & A_REQ_TMROUT) { | |
f35ae634 | 744 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
745 | pr_info("otg: BCON_TMOUT from %s, %06x\n", |
746 | state_name(isp), otg_ctrl); | |
747 | notresponding(isp); | |
748 | ||
749 | otg_ctrl |= OTG_BUSDROP; | |
750 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 751 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
752 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; |
753 | ||
f35ae634 | 754 | omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
755 | ret = IRQ_HANDLED; |
756 | ||
757 | /* A-supplied voltage fell too low; overcurrent */ | |
758 | } else if (otg_irq & A_VBUS_ERR) { | |
f35ae634 | 759 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
760 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", |
761 | state_name(isp), otg_irq, otg_ctrl); | |
762 | ||
763 | otg_ctrl |= OTG_BUSDROP; | |
764 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 765 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
766 | isp->otg.state = OTG_STATE_A_VBUS_ERR; |
767 | ||
f35ae634 | 768 | omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); |
1da177e4 LT |
769 | ret = IRQ_HANDLED; |
770 | ||
771 | /* switch driver; the transciever code activates it, | |
772 | * ungating the udc clock or resuming OHCI. | |
773 | */ | |
774 | } else if (otg_irq & DRIVER_SWITCH) { | |
775 | int kick = 0; | |
776 | ||
f35ae634 | 777 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
778 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", |
779 | state_name(isp), | |
780 | (otg_ctrl & OTG_DRIVER_SEL) | |
781 | ? "gadget" : "host", | |
782 | otg_ctrl); | |
783 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
784 | ||
785 | /* role is peripheral */ | |
786 | if (otg_ctrl & OTG_DRIVER_SEL) { | |
787 | switch (isp->otg.state) { | |
788 | case OTG_STATE_A_IDLE: | |
08882d20 | 789 | b_idle(isp, __func__); |
1da177e4 LT |
790 | break; |
791 | default: | |
792 | break; | |
793 | } | |
794 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
795 | ||
796 | /* role is host */ | |
797 | } else { | |
798 | if (!(otg_ctrl & OTG_ID)) { | |
25da383d | 799 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
f35ae634 | 800 | omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL); |
1da177e4 LT |
801 | } |
802 | ||
803 | if (isp->otg.host) { | |
804 | switch (isp->otg.state) { | |
805 | case OTG_STATE_B_WAIT_ACON: | |
806 | isp->otg.state = OTG_STATE_B_HOST; | |
807 | pr_debug(" --> b_host\n"); | |
808 | kick = 1; | |
809 | break; | |
810 | case OTG_STATE_A_WAIT_BCON: | |
811 | isp->otg.state = OTG_STATE_A_HOST; | |
812 | pr_debug(" --> a_host\n"); | |
813 | break; | |
814 | case OTG_STATE_A_PERIPHERAL: | |
815 | isp->otg.state = OTG_STATE_A_WAIT_BCON; | |
816 | pr_debug(" --> a_wait_bcon\n"); | |
817 | break; | |
818 | default: | |
819 | break; | |
820 | } | |
821 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
822 | } | |
823 | } | |
824 | ||
f35ae634 | 825 | omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); |
1da177e4 LT |
826 | ret = IRQ_HANDLED; |
827 | ||
828 | if (kick) | |
829 | usb_bus_start_enum(isp->otg.host, | |
830 | isp->otg.host->otg_port); | |
831 | } | |
832 | ||
08882d20 | 833 | check_state(isp, __func__); |
1da177e4 LT |
834 | return ret; |
835 | } | |
836 | ||
837 | static struct platform_device *otg_dev; | |
838 | ||
839 | static int otg_init(struct isp1301 *isp) | |
840 | { | |
f35ae634 TL |
841 | u32 l; |
842 | ||
1da177e4 LT |
843 | if (!otg_dev) |
844 | return -ENODEV; | |
845 | ||
08882d20 | 846 | dump_regs(isp, __func__); |
1da177e4 | 847 | /* some of these values are board-specific... */ |
f35ae634 TL |
848 | l = omap_readl(OTG_SYSCON_2); |
849 | l |= OTG_EN | |
1da177e4 LT |
850 | /* for B-device: */ |
851 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ | |
852 | | SRP_GPDVBUS /* discharge after VBUS pulse */ | |
853 | // | (3 << 24) /* 2msec VBUS pulse */ | |
854 | /* for A-device: */ | |
855 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ | |
856 | | SRP_DPW /* detect 167+ns SRP pulses */ | |
857 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ | |
858 | ; | |
f35ae634 | 859 | omap_writel(l, OTG_SYSCON_2); |
1da177e4 LT |
860 | |
861 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
862 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
863 | ||
08882d20 | 864 | check_state(isp, __func__); |
1da177e4 | 865 | pr_debug("otg: %s, %s %06x\n", |
f35ae634 | 866 | state_name(isp), __func__, omap_readl(OTG_CTRL)); |
1da177e4 | 867 | |
f35ae634 | 868 | omap_writew(DRIVER_SWITCH | OPRT_CHG |
1da177e4 | 869 | | B_SRP_TMROUT | B_HNP_FAIL |
f35ae634 TL |
870 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN); |
871 | ||
872 | l = omap_readl(OTG_SYSCON_2); | |
873 | l |= OTG_EN; | |
874 | omap_writel(l, OTG_SYSCON_2); | |
1da177e4 LT |
875 | |
876 | return 0; | |
877 | } | |
878 | ||
3ae5eaec | 879 | static int otg_probe(struct platform_device *dev) |
1da177e4 LT |
880 | { |
881 | // struct omap_usb_config *config = dev->platform_data; | |
882 | ||
3ae5eaec | 883 | otg_dev = dev; |
1da177e4 LT |
884 | return 0; |
885 | } | |
886 | ||
3ae5eaec | 887 | static int otg_remove(struct platform_device *dev) |
1da177e4 LT |
888 | { |
889 | otg_dev = 0; | |
890 | return 0; | |
891 | } | |
892 | ||
3ae5eaec | 893 | struct platform_driver omap_otg_driver = { |
1da177e4 | 894 | .probe = otg_probe, |
3ae5eaec RK |
895 | .remove = otg_remove, |
896 | .driver = { | |
897 | .owner = THIS_MODULE, | |
898 | .name = "omap_otg", | |
899 | }, | |
1da177e4 LT |
900 | }; |
901 | ||
902 | static int otg_bind(struct isp1301 *isp) | |
903 | { | |
904 | int status; | |
905 | ||
906 | if (otg_dev) | |
907 | return -EBUSY; | |
908 | ||
3ae5eaec | 909 | status = platform_driver_register(&omap_otg_driver); |
1da177e4 LT |
910 | if (status < 0) |
911 | return status; | |
912 | ||
913 | if (otg_dev) | |
914 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, | |
dace1453 | 915 | IRQF_DISABLED, DRIVER_NAME, isp); |
1da177e4 LT |
916 | else |
917 | status = -ENODEV; | |
918 | ||
919 | if (status < 0) | |
3ae5eaec | 920 | platform_driver_unregister(&omap_otg_driver); |
1da177e4 LT |
921 | return status; |
922 | } | |
923 | ||
924 | static void otg_unbind(struct isp1301 *isp) | |
925 | { | |
926 | if (!otg_dev) | |
927 | return; | |
928 | free_irq(otg_dev->resource[1].start, isp); | |
929 | } | |
930 | ||
931 | #else | |
932 | ||
933 | /* OTG controller isn't clocked */ | |
934 | ||
935 | #endif /* CONFIG_USB_OTG */ | |
936 | ||
937 | /*-------------------------------------------------------------------------*/ | |
938 | ||
939 | static void b_peripheral(struct isp1301 *isp) | |
940 | { | |
f35ae634 TL |
941 | u32 l; |
942 | ||
943 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; | |
944 | omap_writel(l, OTG_CTRL); | |
945 | ||
1da177e4 LT |
946 | usb_gadget_vbus_connect(isp->otg.gadget); |
947 | ||
948 | #ifdef CONFIG_USB_OTG | |
949 | enable_vbus_draw(isp, 8); | |
950 | otg_update_isp(isp); | |
951 | #else | |
952 | enable_vbus_draw(isp, 100); | |
953 | /* UDC driver just set OTG_BSESSVLD */ | |
954 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); | |
955 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); | |
956 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
957 | pr_debug(" --> b_peripheral\n"); | |
958 | dump_regs(isp, "2periph"); | |
959 | #endif | |
960 | } | |
961 | ||
962 | static void isp_update_otg(struct isp1301 *isp, u8 stat) | |
963 | { | |
964 | u8 isp_stat, isp_bstat; | |
965 | enum usb_otg_state state = isp->otg.state; | |
966 | ||
967 | if (stat & INTR_BDIS_ACON) | |
968 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); | |
969 | ||
970 | /* start certain state transitions right away */ | |
971 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
972 | if (isp_stat & INTR_ID_GND) { | |
973 | if (isp->otg.default_a) { | |
974 | switch (state) { | |
975 | case OTG_STATE_B_IDLE: | |
976 | a_idle(isp, "idle"); | |
977 | /* FALLTHROUGH */ | |
978 | case OTG_STATE_A_IDLE: | |
979 | enable_vbus_source(isp); | |
980 | /* FALLTHROUGH */ | |
981 | case OTG_STATE_A_WAIT_VRISE: | |
982 | /* we skip over OTG_STATE_A_WAIT_BCON, since | |
983 | * the HC will transition to A_HOST (or | |
984 | * A_SUSPEND!) without our noticing except | |
985 | * when HNP is used. | |
986 | */ | |
987 | if (isp_stat & INTR_VBUS_VLD) | |
988 | isp->otg.state = OTG_STATE_A_HOST; | |
989 | break; | |
990 | case OTG_STATE_A_WAIT_VFALL: | |
991 | if (!(isp_stat & INTR_SESS_VLD)) | |
992 | a_idle(isp, "vfell"); | |
993 | break; | |
994 | default: | |
995 | if (!(isp_stat & INTR_VBUS_VLD)) | |
996 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
997 | break; | |
998 | } | |
999 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1000 | } else { | |
1001 | switch (state) { | |
1002 | case OTG_STATE_B_PERIPHERAL: | |
1003 | case OTG_STATE_B_HOST: | |
1004 | case OTG_STATE_B_WAIT_ACON: | |
1005 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
1006 | break; | |
1007 | default: | |
1008 | break; | |
1009 | } | |
1010 | if (state != OTG_STATE_A_IDLE) | |
1011 | a_idle(isp, "id"); | |
1012 | if (isp->otg.host && state == OTG_STATE_A_IDLE) | |
1013 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
1014 | isp_bstat = 0; | |
1015 | } | |
1016 | } else { | |
f35ae634 TL |
1017 | u32 l; |
1018 | ||
1da177e4 LT |
1019 | /* if user unplugged mini-A end of cable, |
1020 | * don't bypass A_WAIT_VFALL. | |
1021 | */ | |
1022 | if (isp->otg.default_a) { | |
1023 | switch (state) { | |
1024 | default: | |
1025 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
1026 | break; | |
1027 | case OTG_STATE_A_WAIT_VFALL: | |
1028 | state = OTG_STATE_A_IDLE; | |
1029 | /* khubd may take a while to notice and | |
1030 | * handle this disconnect, so don't go | |
1031 | * to B_IDLE quite yet. | |
1032 | */ | |
1033 | break; | |
1034 | case OTG_STATE_A_IDLE: | |
1035 | host_suspend(isp); | |
1036 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, | |
1037 | MC1_BDIS_ACON_EN); | |
1038 | isp->otg.state = OTG_STATE_B_IDLE; | |
f35ae634 TL |
1039 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1040 | l &= ~OTG_CTRL_BITS; | |
1041 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1042 | break; |
1043 | case OTG_STATE_B_IDLE: | |
1044 | break; | |
1045 | } | |
1046 | } | |
1047 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1048 | ||
1049 | switch (isp->otg.state) { | |
1050 | case OTG_STATE_B_PERIPHERAL: | |
1051 | case OTG_STATE_B_WAIT_ACON: | |
1052 | case OTG_STATE_B_HOST: | |
1053 | if (likely(isp_bstat & OTG_B_SESS_VLD)) | |
1054 | break; | |
1055 | enable_vbus_draw(isp, 0); | |
1056 | #ifndef CONFIG_USB_OTG | |
1057 | /* UDC driver will clear OTG_BSESSVLD */ | |
1058 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1059 | OTG1_DP_PULLDOWN); | |
1060 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1061 | OTG1_DP_PULLUP); | |
08882d20 | 1062 | dump_regs(isp, __func__); |
1da177e4 LT |
1063 | #endif |
1064 | /* FALLTHROUGH */ | |
1065 | case OTG_STATE_B_SRP_INIT: | |
08882d20 | 1066 | b_idle(isp, __func__); |
f35ae634 TL |
1067 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
1068 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1069 | /* FALLTHROUGH */ |
1070 | case OTG_STATE_B_IDLE: | |
1071 | if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) { | |
1072 | #ifdef CONFIG_USB_OTG | |
1073 | update_otg1(isp, isp_stat); | |
1074 | update_otg2(isp, isp_bstat); | |
1075 | #endif | |
1076 | b_peripheral(isp); | |
1077 | } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) | |
1078 | isp_bstat |= OTG_B_SESS_END; | |
1079 | break; | |
1080 | case OTG_STATE_A_WAIT_VFALL: | |
1081 | break; | |
1082 | default: | |
1083 | pr_debug("otg: unsupported b-device %s\n", | |
1084 | state_name(isp)); | |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | if (state != isp->otg.state) | |
1090 | pr_debug(" isp, %s -> %s\n", | |
1091 | state_string(state), state_name(isp)); | |
1092 | ||
1093 | #ifdef CONFIG_USB_OTG | |
1094 | /* update the OTG controller state to match the isp1301; may | |
1095 | * trigger OPRT_CHG irqs for changes going to the isp1301. | |
1096 | */ | |
1097 | update_otg1(isp, isp_stat); | |
1098 | update_otg2(isp, isp_bstat); | |
08882d20 | 1099 | check_state(isp, __func__); |
1da177e4 LT |
1100 | #endif |
1101 | ||
1102 | dump_regs(isp, "isp1301->otg"); | |
1103 | } | |
1104 | ||
1105 | /*-------------------------------------------------------------------------*/ | |
1106 | ||
1107 | static u8 isp1301_clear_latch(struct isp1301 *isp) | |
1108 | { | |
1109 | u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); | |
1110 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); | |
1111 | return latch; | |
1112 | } | |
1113 | ||
1114 | static void | |
25da383d | 1115 | isp1301_work(struct work_struct *work) |
1da177e4 | 1116 | { |
25da383d | 1117 | struct isp1301 *isp = container_of(work, struct isp1301, work); |
1da177e4 LT |
1118 | int stop; |
1119 | ||
1120 | /* implicit lock: we're the only task using this device */ | |
1121 | isp->working = 1; | |
1122 | do { | |
1123 | stop = test_bit(WORK_STOP, &isp->todo); | |
1124 | ||
1125 | #ifdef CONFIG_USB_OTG | |
1126 | /* transfer state from otg engine to isp1301 */ | |
1127 | if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { | |
1128 | otg_update_isp(isp); | |
a5f08a32 | 1129 | put_device(&isp->client->dev); |
1da177e4 LT |
1130 | } |
1131 | #endif | |
1132 | /* transfer state from isp1301 to otg engine */ | |
1133 | if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { | |
1134 | u8 stat = isp1301_clear_latch(isp); | |
1135 | ||
1136 | isp_update_otg(isp, stat); | |
a5f08a32 | 1137 | put_device(&isp->client->dev); |
1da177e4 LT |
1138 | } |
1139 | ||
1140 | if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { | |
1141 | u32 otg_ctrl; | |
1142 | ||
1143 | /* | |
1144 | * skip A_WAIT_VRISE; hc transitions invisibly | |
1145 | * skip A_WAIT_BCON; same. | |
1146 | */ | |
1147 | switch (isp->otg.state) { | |
1148 | case OTG_STATE_A_WAIT_BCON: | |
1149 | case OTG_STATE_A_WAIT_VRISE: | |
1150 | isp->otg.state = OTG_STATE_A_HOST; | |
1151 | pr_debug(" --> a_host\n"); | |
f35ae634 | 1152 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1153 | otg_ctrl |= OTG_A_BUSREQ; |
1154 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
1155 | & OTG_CTRL_MASK; | |
f35ae634 | 1156 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
1157 | break; |
1158 | case OTG_STATE_B_WAIT_ACON: | |
1159 | isp->otg.state = OTG_STATE_B_HOST; | |
1160 | pr_debug(" --> b_host (acon)\n"); | |
1161 | break; | |
1162 | case OTG_STATE_B_HOST: | |
1163 | case OTG_STATE_B_IDLE: | |
1164 | case OTG_STATE_A_IDLE: | |
1165 | break; | |
1166 | default: | |
1167 | pr_debug(" host resume in %s\n", | |
1168 | state_name(isp)); | |
1169 | } | |
1170 | host_resume(isp); | |
1171 | // mdelay(10); | |
a5f08a32 | 1172 | put_device(&isp->client->dev); |
1da177e4 LT |
1173 | } |
1174 | ||
1175 | if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { | |
1176 | #ifdef VERBOSE | |
1177 | dump_regs(isp, "timer"); | |
1178 | if (!stop) | |
1179 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1180 | #endif | |
a5f08a32 | 1181 | put_device(&isp->client->dev); |
1da177e4 LT |
1182 | } |
1183 | ||
1184 | if (isp->todo) | |
a5f08a32 | 1185 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
1186 | "work done, todo = 0x%lx\n", |
1187 | isp->todo); | |
1188 | if (stop) { | |
a5f08a32 | 1189 | dev_dbg(&isp->client->dev, "stop\n"); |
1da177e4 LT |
1190 | break; |
1191 | } | |
1192 | } while (isp->todo); | |
1193 | isp->working = 0; | |
1194 | } | |
1195 | ||
7d12e780 | 1196 | static irqreturn_t isp1301_irq(int irq, void *isp) |
1da177e4 LT |
1197 | { |
1198 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
1199 | return IRQ_HANDLED; | |
1200 | } | |
1201 | ||
1202 | static void isp1301_timer(unsigned long _isp) | |
1203 | { | |
1204 | isp1301_defer_work((void *)_isp, WORK_TIMER); | |
1205 | } | |
1206 | ||
1207 | /*-------------------------------------------------------------------------*/ | |
1208 | ||
1209 | static void isp1301_release(struct device *dev) | |
1210 | { | |
1211 | struct isp1301 *isp; | |
1212 | ||
a5f08a32 | 1213 | isp = dev_get_drvdata(dev); |
1da177e4 LT |
1214 | |
1215 | /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ | |
1216 | if (isp->i2c_release) | |
1217 | isp->i2c_release(dev); | |
1218 | kfree (isp); | |
1219 | } | |
1220 | ||
1221 | static struct isp1301 *the_transceiver; | |
1222 | ||
9df013b3 | 1223 | static int __exit isp1301_remove(struct i2c_client *i2c) |
1da177e4 LT |
1224 | { |
1225 | struct isp1301 *isp; | |
1226 | ||
a5f08a32 | 1227 | isp = i2c_get_clientdata(i2c); |
1da177e4 LT |
1228 | |
1229 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1230 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
9df013b3 | 1231 | free_irq(i2c->irq, isp); |
1da177e4 LT |
1232 | #ifdef CONFIG_USB_OTG |
1233 | otg_unbind(isp); | |
1234 | #endif | |
1235 | if (machine_is_omap_h2()) | |
1236 | omap_free_gpio(2); | |
1237 | ||
1238 | isp->timer.data = 0; | |
1239 | set_bit(WORK_STOP, &isp->todo); | |
1240 | del_timer_sync(&isp->timer); | |
1241 | flush_scheduled_work(); | |
1242 | ||
1243 | put_device(&i2c->dev); | |
1244 | the_transceiver = 0; | |
1245 | ||
9df013b3 | 1246 | return 0; |
1da177e4 LT |
1247 | } |
1248 | ||
1249 | /*-------------------------------------------------------------------------*/ | |
1250 | ||
1251 | /* NOTE: three modes are possible here, only one of which | |
1252 | * will be standards-conformant on any given system: | |
1253 | * | |
1254 | * - OTG mode (dual-role), required if there's a Mini-AB connector | |
1255 | * - HOST mode, for when there's one or more A (host) connectors | |
1256 | * - DEVICE mode, for when there's a B/Mini-B (device) connector | |
1257 | * | |
1258 | * As a rule, you won't have an isp1301 chip unless it's there to | |
25da383d | 1259 | * support the OTG mode. Other modes help testing USB controllers |
1da177e4 LT |
1260 | * in isolation from (full) OTG support, or maybe so later board |
1261 | * revisions can help to support those feature. | |
1262 | */ | |
1263 | ||
1264 | #ifdef CONFIG_USB_OTG | |
1265 | ||
1266 | static int isp1301_otg_enable(struct isp1301 *isp) | |
1267 | { | |
1268 | power_up(isp); | |
1269 | otg_init(isp); | |
1270 | ||
1271 | /* NOTE: since we don't change this, this provides | |
1272 | * a few more interrupts than are strictly needed. | |
1273 | */ | |
1274 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1275 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1276 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1277 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1278 | |
a5f08a32 | 1279 | dev_info(&isp->client->dev, "ready for dual-role USB ...\n"); |
1da177e4 LT |
1280 | |
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | #endif | |
1285 | ||
1286 | /* add or disable the host device+driver */ | |
1287 | static int | |
1288 | isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host) | |
1289 | { | |
1290 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
1291 | ||
1292 | if (!otg || isp != the_transceiver) | |
1293 | return -ENODEV; | |
1294 | ||
1295 | if (!host) { | |
f35ae634 | 1296 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 LT |
1297 | power_down(isp); |
1298 | isp->otg.host = 0; | |
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | #ifdef CONFIG_USB_OTG | |
1303 | isp->otg.host = host; | |
a5f08a32 | 1304 | dev_dbg(&isp->client->dev, "registered host\n"); |
1da177e4 LT |
1305 | host_suspend(isp); |
1306 | if (isp->otg.gadget) | |
1307 | return isp1301_otg_enable(isp); | |
1308 | return 0; | |
1309 | ||
1310 | #elif !defined(CONFIG_USB_GADGET_OMAP) | |
1311 | // FIXME update its refcount | |
1312 | isp->otg.host = host; | |
1313 | ||
1314 | power_up(isp); | |
1315 | ||
1316 | if (machine_is_omap_h2()) | |
1317 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1318 | ||
a5f08a32 | 1319 | dev_info(&isp->client->dev, "A-Host sessions ok\n"); |
1da177e4 | 1320 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, |
25da383d | 1321 | INTR_ID_GND); |
1da177e4 | 1322 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1323 | INTR_ID_GND); |
1da177e4 LT |
1324 | |
1325 | /* If this has a Mini-AB connector, this mode is highly | |
1326 | * nonstandard ... but can be handy for testing, especially with | |
1327 | * the Mini-A end of an OTG cable. (Or something nonstandard | |
1328 | * like MiniB-to-StandardB, maybe built with a gender mender.) | |
1329 | */ | |
1330 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); | |
1331 | ||
08882d20 | 1332 | dump_regs(isp, __func__); |
1da177e4 LT |
1333 | |
1334 | return 0; | |
1335 | ||
1336 | #else | |
a5f08a32 | 1337 | dev_dbg(&isp->client->dev, "host sessions not allowed\n"); |
1da177e4 LT |
1338 | return -EINVAL; |
1339 | #endif | |
1340 | ||
1341 | } | |
1342 | ||
1343 | static int | |
1344 | isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) | |
1345 | { | |
1346 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
f35ae634 | 1347 | u32 l; |
1da177e4 LT |
1348 | |
1349 | if (!otg || isp != the_transceiver) | |
1350 | return -ENODEV; | |
1351 | ||
1352 | if (!gadget) { | |
f35ae634 | 1353 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 LT |
1354 | if (!isp->otg.default_a) |
1355 | enable_vbus_draw(isp, 0); | |
1356 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
1357 | isp->otg.gadget = 0; | |
1358 | power_down(isp); | |
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | #ifdef CONFIG_USB_OTG | |
1363 | isp->otg.gadget = gadget; | |
a5f08a32 | 1364 | dev_dbg(&isp->client->dev, "registered gadget\n"); |
1da177e4 LT |
1365 | /* gadget driver may be suspended until vbus_connect () */ |
1366 | if (isp->otg.host) | |
1367 | return isp1301_otg_enable(isp); | |
1368 | return 0; | |
1369 | ||
1370 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) | |
1371 | isp->otg.gadget = gadget; | |
1372 | // FIXME update its refcount | |
1373 | ||
f35ae634 TL |
1374 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1375 | l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS); | |
1376 | l |= OTG_ID; | |
1377 | omap_writel(l, OTG_CTRL); | |
1378 | ||
1da177e4 LT |
1379 | power_up(isp); |
1380 | isp->otg.state = OTG_STATE_B_IDLE; | |
1381 | ||
1382 | if (machine_is_omap_h2()) | |
1383 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1384 | ||
1385 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1386 | INTR_SESS_VLD); |
1da177e4 | 1387 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1388 | INTR_VBUS_VLD); |
a5f08a32 | 1389 | dev_info(&isp->client->dev, "B-Peripheral sessions ok\n"); |
08882d20 | 1390 | dump_regs(isp, __func__); |
1da177e4 LT |
1391 | |
1392 | /* If this has a Mini-AB connector, this mode is highly | |
1393 | * nonstandard ... but can be handy for testing, so long | |
1394 | * as you don't plug a Mini-A cable into the jack. | |
1395 | */ | |
1396 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) | |
1397 | b_peripheral(isp); | |
1398 | ||
1399 | return 0; | |
1400 | ||
1401 | #else | |
a5f08a32 | 1402 | dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n"); |
1da177e4 LT |
1403 | return -EINVAL; |
1404 | #endif | |
1405 | } | |
1406 | ||
1407 | ||
1408 | /*-------------------------------------------------------------------------*/ | |
1409 | ||
1410 | static int | |
1411 | isp1301_set_power(struct otg_transceiver *dev, unsigned mA) | |
1412 | { | |
1413 | if (!the_transceiver) | |
1414 | return -ENODEV; | |
1415 | if (dev->state == OTG_STATE_B_PERIPHERAL) | |
1416 | enable_vbus_draw(the_transceiver, mA); | |
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | static int | |
1421 | isp1301_start_srp(struct otg_transceiver *dev) | |
1422 | { | |
1423 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1424 | u32 otg_ctrl; | |
1425 | ||
1426 | if (!dev || isp != the_transceiver | |
1427 | || isp->otg.state != OTG_STATE_B_IDLE) | |
1428 | return -ENODEV; | |
1429 | ||
f35ae634 | 1430 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1431 | if (!(otg_ctrl & OTG_BSESSEND)) |
1432 | return -EINVAL; | |
1433 | ||
1434 | otg_ctrl |= OTG_B_BUSREQ; | |
1435 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; | |
f35ae634 | 1436 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
1437 | isp->otg.state = OTG_STATE_B_SRP_INIT; |
1438 | ||
f35ae634 TL |
1439 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), |
1440 | omap_readl(OTG_CTRL)); | |
1da177e4 | 1441 | #ifdef CONFIG_USB_OTG |
08882d20 | 1442 | check_state(isp, __func__); |
1da177e4 LT |
1443 | #endif |
1444 | return 0; | |
1445 | } | |
1446 | ||
1447 | static int | |
1448 | isp1301_start_hnp(struct otg_transceiver *dev) | |
1449 | { | |
1450 | #ifdef CONFIG_USB_OTG | |
1451 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
f35ae634 | 1452 | u32 l; |
1da177e4 LT |
1453 | |
1454 | if (!dev || isp != the_transceiver) | |
1455 | return -ENODEV; | |
1456 | if (isp->otg.default_a && (isp->otg.host == NULL | |
1457 | || !isp->otg.host->b_hnp_enable)) | |
1458 | return -ENOTCONN; | |
1459 | if (!isp->otg.default_a && (isp->otg.gadget == NULL | |
1460 | || !isp->otg.gadget->b_hnp_enable)) | |
1461 | return -ENOTCONN; | |
1462 | ||
1463 | /* We want hardware to manage most HNP protocol timings. | |
1464 | * So do this part as early as possible... | |
1465 | */ | |
1466 | switch (isp->otg.state) { | |
1467 | case OTG_STATE_B_HOST: | |
1468 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
1469 | /* caller will suspend next */ | |
1470 | break; | |
1471 | case OTG_STATE_A_HOST: | |
1472 | #if 0 | |
1473 | /* autoconnect mode avoids irq latency bugs */ | |
1474 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1475 | MC1_BDIS_ACON_EN); | |
1476 | #endif | |
1477 | /* caller must suspend then clear A_BUSREQ */ | |
1478 | usb_gadget_vbus_connect(isp->otg.gadget); | |
f35ae634 TL |
1479 | l = omap_readl(OTG_CTRL); |
1480 | l |= OTG_A_SETB_HNPEN; | |
1481 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1482 | |
1483 | break; | |
1484 | case OTG_STATE_A_PERIPHERAL: | |
1485 | /* initiated by B-Host suspend */ | |
1486 | break; | |
1487 | default: | |
1488 | return -EILSEQ; | |
1489 | } | |
1490 | pr_debug("otg: HNP %s, %06x ...\n", | |
f35ae634 | 1491 | state_name(isp), omap_readl(OTG_CTRL)); |
08882d20 | 1492 | check_state(isp, __func__); |
1da177e4 LT |
1493 | return 0; |
1494 | #else | |
1495 | /* srp-only */ | |
1496 | return -EINVAL; | |
1497 | #endif | |
1498 | } | |
1499 | ||
1500 | /*-------------------------------------------------------------------------*/ | |
1501 | ||
9df013b3 | 1502 | static int __init isp1301_probe(struct i2c_client *i2c) |
1da177e4 LT |
1503 | { |
1504 | int status; | |
1505 | struct isp1301 *isp; | |
1da177e4 LT |
1506 | |
1507 | if (the_transceiver) | |
1508 | return 0; | |
1509 | ||
82ca76b6 | 1510 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
1da177e4 LT |
1511 | if (!isp) |
1512 | return 0; | |
1513 | ||
25da383d | 1514 | INIT_WORK(&isp->work, isp1301_work); |
1da177e4 LT |
1515 | init_timer(&isp->timer); |
1516 | isp->timer.function = isp1301_timer; | |
1517 | isp->timer.data = (unsigned long) isp; | |
1518 | ||
9df013b3 JD |
1519 | i2c_set_clientdata(i2c, isp); |
1520 | isp->client = i2c; | |
1da177e4 | 1521 | |
9df013b3 JD |
1522 | /* verify the chip (shouldn't be necesary) */ |
1523 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); | |
1524 | if (status != I2C_VENDOR_ID_PHILIPS) { | |
1525 | dev_dbg(&i2c->dev, "not philips id: %d\n", status); | |
1526 | goto fail; | |
1527 | } | |
1528 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); | |
1529 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { | |
1530 | dev_dbg(&i2c->dev, "not isp1301, %d\n", status); | |
1531 | goto fail; | |
1da177e4 LT |
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"); | |
9df013b3 | 1560 | goto fail; |
1da177e4 LT |
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, | |
cbbcb9b0 | 1567 | MC1_SPEED); |
1da177e4 LT |
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); | |
25da383d DB |
1573 | if (gpio_request(2, "isp1301") == 0) |
1574 | gpio_direction_input(2); | |
1575 | isp->irq_type = IRQF_TRIGGER_FALLING; | |
1da177e4 LT |
1576 | } |
1577 | ||
25da383d | 1578 | isp->irq_type |= IRQF_SAMPLE_RANDOM; |
9df013b3 | 1579 | status = request_irq(i2c->irq, isp1301_irq, |
25da383d | 1580 | isp->irq_type, DRIVER_NAME, isp); |
1da177e4 LT |
1581 | if (status < 0) { |
1582 | dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", | |
9df013b3 JD |
1583 | i2c->irq, status); |
1584 | goto fail; | |
1da177e4 LT |
1585 | } |
1586 | ||
9df013b3 | 1587 | isp->otg.dev = &i2c->dev; |
1da177e4 LT |
1588 | isp->otg.label = DRIVER_NAME; |
1589 | ||
1590 | isp->otg.set_host = isp1301_set_host, | |
1591 | isp->otg.set_peripheral = isp1301_set_peripheral, | |
1592 | isp->otg.set_power = isp1301_set_power, | |
1593 | isp->otg.start_srp = isp1301_start_srp, | |
1594 | isp->otg.start_hnp = isp1301_start_hnp, | |
1595 | ||
1596 | enable_vbus_draw(isp, 0); | |
1597 | power_down(isp); | |
1598 | the_transceiver = isp; | |
1599 | ||
1600 | #ifdef CONFIG_USB_OTG | |
1601 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
1602 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
1603 | #endif | |
1604 | ||
08882d20 | 1605 | dump_regs(isp, __func__); |
1da177e4 LT |
1606 | |
1607 | #ifdef VERBOSE | |
1608 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1609 | dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); | |
1610 | #endif | |
1611 | ||
1612 | status = otg_set_transceiver(&isp->otg); | |
1613 | if (status < 0) | |
1614 | dev_err(&i2c->dev, "can't register transceiver, %d\n", | |
1615 | status); | |
1616 | ||
1617 | return 0; | |
1da177e4 | 1618 | |
9df013b3 JD |
1619 | fail: |
1620 | kfree(isp); | |
1621 | return -ENODEV; | |
1da177e4 LT |
1622 | } |
1623 | ||
9df013b3 JD |
1624 | static const struct i2c_device_id isp1301_id[] = { |
1625 | { "isp1301_omap", 0 }, | |
1626 | { } | |
1627 | }; | |
1628 | MODULE_DEVICE_TABLE(i2c, isp1301_id); | |
1629 | ||
1da177e4 | 1630 | static struct i2c_driver isp1301_driver = { |
a9718b0c | 1631 | .driver = { |
a9718b0c LR |
1632 | .name = "isp1301_omap", |
1633 | }, | |
9df013b3 JD |
1634 | .probe = isp1301_probe, |
1635 | .remove = __exit_p(isp1301_remove), | |
1636 | .id_table = isp1301_id, | |
1da177e4 LT |
1637 | }; |
1638 | ||
1639 | /*-------------------------------------------------------------------------*/ | |
1640 | ||
1641 | static int __init isp_init(void) | |
1642 | { | |
1643 | return i2c_add_driver(&isp1301_driver); | |
1644 | } | |
1645 | module_init(isp_init); | |
1646 | ||
1647 | static void __exit isp_exit(void) | |
1648 | { | |
1649 | if (the_transceiver) | |
1650 | otg_set_transceiver(0); | |
1651 | i2c_del_driver(&isp1301_driver); | |
1652 | } | |
1653 | module_exit(isp_exit); | |
1654 |