]>
Commit | Line | Data |
---|---|---|
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 | ||
a09e64fb | 39 | #include <mach/usb.h> |
d1846b0e | 40 | #include <mach/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 | ||
120 | static void enable_vbus_source(struct isp1301 *isp) | |
121 | { | |
122 | /* this board won't supply more than 8mA vbus power. | |
123 | * some boards can switch a 100ma "unit load" (or more). | |
124 | */ | |
125 | } | |
126 | ||
127 | ||
128 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
129 | static inline void notresponding(struct isp1301 *isp) | |
130 | { | |
131 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
132 | } | |
133 | ||
134 | ||
d1846b0e DB |
135 | #endif |
136 | ||
137 | #if defined(CONFIG_MACH_OMAP_H4) | |
138 | ||
139 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
140 | { | |
141 | /* H4 controls this by DIP switch S2.4; no soft control. | |
142 | * ON means the charger is always enabled. Leave it OFF | |
143 | * unless the OTG port is used only in B-peripheral mode. | |
144 | */ | |
145 | } | |
146 | ||
147 | static void enable_vbus_source(struct isp1301 *isp) | |
148 | { | |
149 | /* this board won't supply more than 8mA vbus power. | |
150 | * some boards can switch a 100ma "unit load" (or more). | |
151 | */ | |
152 | } | |
153 | ||
154 | ||
155 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
156 | static inline void notresponding(struct isp1301 *isp) | |
157 | { | |
158 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
159 | } | |
160 | ||
161 | ||
1da177e4 LT |
162 | #endif |
163 | ||
164 | /*-------------------------------------------------------------------------*/ | |
165 | ||
1da177e4 LT |
166 | static struct i2c_driver isp1301_driver; |
167 | ||
168 | /* smbus apis are used for portability */ | |
169 | ||
170 | static inline u8 | |
171 | isp1301_get_u8(struct isp1301 *isp, u8 reg) | |
172 | { | |
a5f08a32 | 173 | return i2c_smbus_read_byte_data(isp->client, reg + 0); |
1da177e4 LT |
174 | } |
175 | ||
176 | static inline int | |
177 | isp1301_get_u16(struct isp1301 *isp, u8 reg) | |
178 | { | |
a5f08a32 | 179 | return i2c_smbus_read_word_data(isp->client, reg); |
1da177e4 LT |
180 | } |
181 | ||
182 | static inline int | |
183 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
184 | { | |
a5f08a32 | 185 | return i2c_smbus_write_byte_data(isp->client, reg + 0, bits); |
1da177e4 LT |
186 | } |
187 | ||
188 | static inline int | |
189 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
190 | { | |
a5f08a32 | 191 | return i2c_smbus_write_byte_data(isp->client, reg + 1, bits); |
1da177e4 LT |
192 | } |
193 | ||
194 | /*-------------------------------------------------------------------------*/ | |
195 | ||
196 | /* identification */ | |
197 | #define ISP1301_VENDOR_ID 0x00 /* u16 read */ | |
198 | #define ISP1301_PRODUCT_ID 0x02 /* u16 read */ | |
199 | #define ISP1301_BCD_DEVICE 0x14 /* u16 read */ | |
200 | ||
201 | #define I2C_VENDOR_ID_PHILIPS 0x04cc | |
202 | #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 | |
203 | ||
204 | /* operational registers */ | |
205 | #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ | |
f35ae634 TL |
206 | # define MC1_SPEED (1 << 0) |
207 | # define MC1_SUSPEND (1 << 1) | |
1da177e4 LT |
208 | # define MC1_DAT_SE0 (1 << 2) |
209 | # define MC1_TRANSPARENT (1 << 3) | |
210 | # define MC1_BDIS_ACON_EN (1 << 4) | |
211 | # define MC1_OE_INT_EN (1 << 5) | |
212 | # define MC1_UART_EN (1 << 6) | |
213 | # define MC1_MASK 0x7f | |
214 | #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ | |
215 | # define MC2_GLOBAL_PWR_DN (1 << 0) | |
216 | # define MC2_SPD_SUSP_CTRL (1 << 1) | |
217 | # define MC2_BI_DI (1 << 2) | |
218 | # define MC2_TRANSP_BDIR0 (1 << 3) | |
219 | # define MC2_TRANSP_BDIR1 (1 << 4) | |
220 | # define MC2_AUDIO_EN (1 << 5) | |
221 | # define MC2_PSW_EN (1 << 6) | |
222 | # define MC2_EN2V7 (1 << 7) | |
223 | #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ | |
224 | # define OTG1_DP_PULLUP (1 << 0) | |
225 | # define OTG1_DM_PULLUP (1 << 1) | |
226 | # define OTG1_DP_PULLDOWN (1 << 2) | |
227 | # define OTG1_DM_PULLDOWN (1 << 3) | |
228 | # define OTG1_ID_PULLDOWN (1 << 4) | |
229 | # define OTG1_VBUS_DRV (1 << 5) | |
230 | # define OTG1_VBUS_DISCHRG (1 << 6) | |
231 | # define OTG1_VBUS_CHRG (1 << 7) | |
232 | #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ | |
233 | # define OTG_B_SESS_END (1 << 6) | |
234 | # define OTG_B_SESS_VLD (1 << 7) | |
235 | ||
236 | #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ | |
237 | #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ | |
238 | ||
239 | #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ | |
240 | #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ | |
241 | ||
242 | /* same bitfields in all interrupt registers */ | |
243 | # define INTR_VBUS_VLD (1 << 0) | |
244 | # define INTR_SESS_VLD (1 << 1) | |
245 | # define INTR_DP_HI (1 << 2) | |
246 | # define INTR_ID_GND (1 << 3) | |
247 | # define INTR_DM_HI (1 << 4) | |
248 | # define INTR_ID_FLOAT (1 << 5) | |
249 | # define INTR_BDIS_ACON (1 << 6) | |
250 | # define INTR_CR_INT (1 << 7) | |
251 | ||
252 | /*-------------------------------------------------------------------------*/ | |
253 | ||
254 | static const char *state_string(enum usb_otg_state state) | |
255 | { | |
256 | switch (state) { | |
257 | case OTG_STATE_A_IDLE: return "a_idle"; | |
258 | case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; | |
259 | case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; | |
260 | case OTG_STATE_A_HOST: return "a_host"; | |
261 | case OTG_STATE_A_SUSPEND: return "a_suspend"; | |
262 | case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; | |
263 | case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; | |
264 | case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; | |
265 | case OTG_STATE_B_IDLE: return "b_idle"; | |
266 | case OTG_STATE_B_SRP_INIT: return "b_srp_init"; | |
267 | case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; | |
268 | case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; | |
269 | case OTG_STATE_B_HOST: return "b_host"; | |
270 | default: return "UNDEFINED"; | |
271 | } | |
272 | } | |
273 | ||
274 | static inline const char *state_name(struct isp1301 *isp) | |
275 | { | |
276 | return state_string(isp->otg.state); | |
277 | } | |
278 | ||
1da177e4 LT |
279 | /*-------------------------------------------------------------------------*/ |
280 | ||
281 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; | |
282 | * not everything is guarded by board-specific checks, or even using | |
283 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. | |
284 | * | |
285 | * ALSO: this currently doesn't use ISP1301 low-power modes | |
286 | * while OTG is running. | |
287 | */ | |
288 | ||
289 | static void power_down(struct isp1301 *isp) | |
290 | { | |
291 | isp->otg.state = OTG_STATE_UNDEFINED; | |
292 | ||
293 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 294 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
1da177e4 LT |
295 | |
296 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); | |
297 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
298 | } | |
299 | ||
300 | static void power_up(struct isp1301 *isp) | |
301 | { | |
302 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 303 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
25da383d | 304 | |
1da177e4 LT |
305 | /* do this only when cpu is driving transceiver, |
306 | * so host won't see a low speed device... | |
307 | */ | |
308 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
309 | } | |
310 | ||
311 | #define NO_HOST_SUSPEND | |
312 | ||
313 | static int host_suspend(struct isp1301 *isp) | |
314 | { | |
315 | #ifdef NO_HOST_SUSPEND | |
316 | return 0; | |
317 | #else | |
318 | struct device *dev; | |
319 | ||
320 | if (!isp->otg.host) | |
321 | return -ENODEV; | |
322 | ||
323 | /* Currently ASSUMES only the OTG port matters; | |
324 | * other ports could be active... | |
325 | */ | |
326 | dev = isp->otg.host->controller; | |
327 | return dev->driver->suspend(dev, 3, 0); | |
328 | #endif | |
329 | } | |
330 | ||
331 | static int host_resume(struct isp1301 *isp) | |
332 | { | |
333 | #ifdef NO_HOST_SUSPEND | |
334 | return 0; | |
335 | #else | |
336 | struct device *dev; | |
337 | ||
338 | if (!isp->otg.host) | |
339 | return -ENODEV; | |
340 | ||
341 | dev = isp->otg.host->controller; | |
342 | return dev->driver->resume(dev, 0); | |
343 | #endif | |
344 | } | |
345 | ||
346 | static int gadget_suspend(struct isp1301 *isp) | |
347 | { | |
348 | isp->otg.gadget->b_hnp_enable = 0; | |
349 | isp->otg.gadget->a_hnp_support = 0; | |
350 | isp->otg.gadget->a_alt_hnp_support = 0; | |
351 | return usb_gadget_vbus_disconnect(isp->otg.gadget); | |
352 | } | |
353 | ||
354 | /*-------------------------------------------------------------------------*/ | |
355 | ||
356 | #define TIMER_MINUTES 10 | |
357 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) | |
358 | ||
359 | /* Almost all our I2C messaging comes from a work queue's task context. | |
360 | * NOTE: guaranteeing certain response times might mean we shouldn't | |
361 | * share keventd's work queue; a realtime task might be safest. | |
362 | */ | |
d1846b0e | 363 | static void isp1301_defer_work(struct isp1301 *isp, int work) |
1da177e4 LT |
364 | { |
365 | int status; | |
366 | ||
367 | if (isp && !test_and_set_bit(work, &isp->todo)) { | |
a5f08a32 | 368 | (void) get_device(&isp->client->dev); |
1da177e4 LT |
369 | status = schedule_work(&isp->work); |
370 | if (!status && !isp->working) | |
a5f08a32 | 371 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
372 | "work item %d may be lost\n", work); |
373 | } | |
374 | } | |
375 | ||
376 | /* called from irq handlers */ | |
377 | static void a_idle(struct isp1301 *isp, const char *tag) | |
378 | { | |
f35ae634 TL |
379 | u32 l; |
380 | ||
1da177e4 LT |
381 | if (isp->otg.state == OTG_STATE_A_IDLE) |
382 | return; | |
383 | ||
384 | isp->otg.default_a = 1; | |
385 | if (isp->otg.host) { | |
386 | isp->otg.host->is_b_host = 0; | |
387 | host_suspend(isp); | |
388 | } | |
389 | if (isp->otg.gadget) { | |
390 | isp->otg.gadget->is_a_peripheral = 1; | |
391 | gadget_suspend(isp); | |
392 | } | |
393 | isp->otg.state = OTG_STATE_A_IDLE; | |
f35ae634 TL |
394 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
395 | omap_writel(l, OTG_CTRL); | |
396 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
397 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
398 | } | |
399 | ||
400 | /* called from irq handlers */ | |
401 | static void b_idle(struct isp1301 *isp, const char *tag) | |
402 | { | |
f35ae634 TL |
403 | u32 l; |
404 | ||
1da177e4 LT |
405 | if (isp->otg.state == OTG_STATE_B_IDLE) |
406 | return; | |
407 | ||
408 | isp->otg.default_a = 0; | |
409 | if (isp->otg.host) { | |
410 | isp->otg.host->is_b_host = 1; | |
411 | host_suspend(isp); | |
412 | } | |
413 | if (isp->otg.gadget) { | |
414 | isp->otg.gadget->is_a_peripheral = 0; | |
415 | gadget_suspend(isp); | |
416 | } | |
417 | isp->otg.state = OTG_STATE_B_IDLE; | |
f35ae634 TL |
418 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
419 | omap_writel(l, OTG_CTRL); | |
420 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
421 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
422 | } | |
423 | ||
424 | static void | |
425 | dump_regs(struct isp1301 *isp, const char *label) | |
426 | { | |
427 | #ifdef DEBUG | |
428 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); | |
429 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
430 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
431 | ||
432 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", | |
f35ae634 | 433 | omap_readl(OTG_CTRL), label, state_name(isp), |
1da177e4 LT |
434 | ctrl, status, src); |
435 | /* mode control and irq enables don't change much */ | |
436 | #endif | |
437 | } | |
438 | ||
439 | /*-------------------------------------------------------------------------*/ | |
440 | ||
441 | #ifdef CONFIG_USB_OTG | |
442 | ||
443 | /* | |
444 | * The OMAP OTG controller handles most of the OTG state transitions. | |
445 | * | |
446 | * We translate isp1301 outputs (mostly voltage comparator status) into | |
447 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state | |
448 | * flags into isp1301 inputs ... and infer state transitions. | |
449 | */ | |
450 | ||
451 | #ifdef VERBOSE | |
452 | ||
453 | static void check_state(struct isp1301 *isp, const char *tag) | |
454 | { | |
455 | enum usb_otg_state state = OTG_STATE_UNDEFINED; | |
f35ae634 | 456 | u8 fsm = omap_readw(OTG_TEST) & 0x0ff; |
1da177e4 LT |
457 | unsigned extra = 0; |
458 | ||
459 | switch (fsm) { | |
460 | ||
461 | /* default-b */ | |
462 | case 0x0: | |
463 | state = OTG_STATE_B_IDLE; | |
464 | break; | |
465 | case 0x3: | |
466 | case 0x7: | |
467 | extra = 1; | |
468 | case 0x1: | |
469 | state = OTG_STATE_B_PERIPHERAL; | |
470 | break; | |
471 | case 0x11: | |
472 | state = OTG_STATE_B_SRP_INIT; | |
473 | break; | |
474 | ||
475 | /* extra dual-role default-b states */ | |
476 | case 0x12: | |
477 | case 0x13: | |
478 | case 0x16: | |
479 | extra = 1; | |
480 | case 0x17: | |
481 | state = OTG_STATE_B_WAIT_ACON; | |
482 | break; | |
483 | case 0x34: | |
484 | state = OTG_STATE_B_HOST; | |
485 | break; | |
486 | ||
487 | /* default-a */ | |
488 | case 0x36: | |
489 | state = OTG_STATE_A_IDLE; | |
490 | break; | |
491 | case 0x3c: | |
492 | state = OTG_STATE_A_WAIT_VFALL; | |
493 | break; | |
494 | case 0x7d: | |
495 | state = OTG_STATE_A_VBUS_ERR; | |
496 | break; | |
497 | case 0x9e: | |
498 | case 0x9f: | |
499 | extra = 1; | |
500 | case 0x89: | |
501 | state = OTG_STATE_A_PERIPHERAL; | |
502 | break; | |
503 | case 0xb7: | |
504 | state = OTG_STATE_A_WAIT_VRISE; | |
505 | break; | |
506 | case 0xb8: | |
507 | state = OTG_STATE_A_WAIT_BCON; | |
508 | break; | |
509 | case 0xb9: | |
510 | state = OTG_STATE_A_HOST; | |
511 | break; | |
512 | case 0xba: | |
513 | state = OTG_STATE_A_SUSPEND; | |
514 | break; | |
515 | default: | |
516 | break; | |
517 | } | |
518 | if (isp->otg.state == state && !extra) | |
519 | return; | |
520 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, | |
f35ae634 TL |
521 | state_string(state), fsm, state_name(isp), |
522 | omap_readl(OTG_CTRL)); | |
1da177e4 LT |
523 | } |
524 | ||
525 | #else | |
526 | ||
527 | static inline void check_state(struct isp1301 *isp, const char *tag) { } | |
528 | ||
529 | #endif | |
530 | ||
531 | /* outputs from ISP1301_INTERRUPT_SOURCE */ | |
532 | static void update_otg1(struct isp1301 *isp, u8 int_src) | |
533 | { | |
534 | u32 otg_ctrl; | |
535 | ||
f35ae634 TL |
536 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
537 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
538 | otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); | |
539 | ||
1da177e4 LT |
540 | if (int_src & INTR_SESS_VLD) |
541 | otg_ctrl |= OTG_ASESSVLD; | |
542 | else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) { | |
543 | a_idle(isp, "vfall"); | |
544 | otg_ctrl &= ~OTG_CTRL_BITS; | |
545 | } | |
546 | if (int_src & INTR_VBUS_VLD) | |
547 | otg_ctrl |= OTG_VBUSVLD; | |
548 | if (int_src & INTR_ID_GND) { /* default-A */ | |
549 | if (isp->otg.state == OTG_STATE_B_IDLE | |
550 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
551 | a_idle(isp, "init"); | |
552 | return; | |
553 | } | |
554 | } else { /* default-B */ | |
555 | otg_ctrl |= OTG_ID; | |
556 | if (isp->otg.state == OTG_STATE_A_IDLE | |
557 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
558 | b_idle(isp, "init"); | |
559 | return; | |
560 | } | |
561 | } | |
f35ae634 | 562 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
563 | } |
564 | ||
565 | /* outputs from ISP1301_OTG_STATUS */ | |
566 | static void update_otg2(struct isp1301 *isp, u8 otg_status) | |
567 | { | |
568 | u32 otg_ctrl; | |
569 | ||
f35ae634 TL |
570 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
571 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
572 | otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND); | |
1da177e4 LT |
573 | if (otg_status & OTG_B_SESS_VLD) |
574 | otg_ctrl |= OTG_BSESSVLD; | |
575 | else if (otg_status & OTG_B_SESS_END) | |
576 | otg_ctrl |= OTG_BSESSEND; | |
f35ae634 | 577 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
578 | } |
579 | ||
580 | /* inputs going to ISP1301 */ | |
581 | static void otg_update_isp(struct isp1301 *isp) | |
582 | { | |
583 | u32 otg_ctrl, otg_change; | |
584 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; | |
585 | ||
f35ae634 | 586 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
587 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; |
588 | isp->last_otg_ctrl = otg_ctrl; | |
589 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; | |
590 | ||
591 | switch (isp->otg.state) { | |
592 | case OTG_STATE_B_IDLE: | |
593 | case OTG_STATE_B_PERIPHERAL: | |
594 | case OTG_STATE_B_SRP_INIT: | |
595 | if (!(otg_ctrl & OTG_PULLUP)) { | |
596 | // if (otg_ctrl & OTG_B_HNPEN) { | |
597 | if (isp->otg.gadget->b_hnp_enable) { | |
598 | isp->otg.state = OTG_STATE_B_WAIT_ACON; | |
599 | pr_debug(" --> b_wait_acon\n"); | |
600 | } | |
601 | goto pulldown; | |
602 | } | |
603 | pullup: | |
604 | set |= OTG1_DP_PULLUP; | |
605 | clr |= OTG1_DP_PULLDOWN; | |
606 | break; | |
607 | case OTG_STATE_A_SUSPEND: | |
608 | case OTG_STATE_A_PERIPHERAL: | |
609 | if (otg_ctrl & OTG_PULLUP) | |
610 | goto pullup; | |
611 | /* FALLTHROUGH */ | |
612 | // case OTG_STATE_B_WAIT_ACON: | |
613 | default: | |
614 | pulldown: | |
615 | set |= OTG1_DP_PULLDOWN; | |
616 | clr |= OTG1_DP_PULLUP; | |
617 | break; | |
618 | } | |
619 | ||
620 | # define toggle(OTG,ISP) do { \ | |
621 | if (otg_ctrl & OTG) set |= ISP; \ | |
622 | else clr |= ISP; \ | |
623 | } while (0) | |
624 | ||
625 | if (!(isp->otg.host)) | |
626 | otg_ctrl &= ~OTG_DRV_VBUS; | |
627 | ||
628 | switch (isp->otg.state) { | |
629 | case OTG_STATE_A_SUSPEND: | |
630 | if (otg_ctrl & OTG_DRV_VBUS) { | |
631 | set |= OTG1_VBUS_DRV; | |
632 | break; | |
633 | } | |
634 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ | |
635 | notresponding(isp); | |
636 | ||
637 | /* FALLTHROUGH */ | |
638 | case OTG_STATE_A_VBUS_ERR: | |
639 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
640 | pr_debug(" --> a_wait_vfall\n"); | |
641 | /* FALLTHROUGH */ | |
642 | case OTG_STATE_A_WAIT_VFALL: | |
643 | /* FIXME usbcore thinks port power is still on ... */ | |
644 | clr |= OTG1_VBUS_DRV; | |
645 | break; | |
646 | case OTG_STATE_A_IDLE: | |
647 | if (otg_ctrl & OTG_DRV_VBUS) { | |
648 | isp->otg.state = OTG_STATE_A_WAIT_VRISE; | |
649 | pr_debug(" --> a_wait_vrise\n"); | |
650 | } | |
651 | /* FALLTHROUGH */ | |
652 | default: | |
653 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); | |
654 | } | |
655 | ||
656 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); | |
657 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); | |
658 | ||
659 | # undef toggle | |
660 | ||
661 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); | |
662 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); | |
663 | ||
664 | /* HNP switch to host or peripheral; and SRP */ | |
665 | if (otg_change & OTG_PULLUP) { | |
f35ae634 TL |
666 | u32 l; |
667 | ||
1da177e4 LT |
668 | switch (isp->otg.state) { |
669 | case OTG_STATE_B_IDLE: | |
670 | if (clr & OTG1_DP_PULLUP) | |
671 | break; | |
672 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
673 | pr_debug(" --> b_peripheral\n"); | |
674 | break; | |
675 | case OTG_STATE_A_SUSPEND: | |
676 | if (clr & OTG1_DP_PULLUP) | |
677 | break; | |
678 | isp->otg.state = OTG_STATE_A_PERIPHERAL; | |
679 | pr_debug(" --> a_peripheral\n"); | |
680 | break; | |
681 | default: | |
682 | break; | |
683 | } | |
f35ae634 TL |
684 | l = omap_readl(OTG_CTRL); |
685 | l |= OTG_PULLUP; | |
686 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
687 | } |
688 | ||
08882d20 | 689 | check_state(isp, __func__); |
1da177e4 LT |
690 | dump_regs(isp, "otg->isp1301"); |
691 | } | |
692 | ||
7d12e780 | 693 | static irqreturn_t omap_otg_irq(int irq, void *_isp) |
1da177e4 | 694 | { |
f35ae634 | 695 | u16 otg_irq = omap_readw(OTG_IRQ_SRC); |
1da177e4 LT |
696 | u32 otg_ctrl; |
697 | int ret = IRQ_NONE; | |
698 | struct isp1301 *isp = _isp; | |
699 | ||
700 | /* update ISP1301 transciever from OTG controller */ | |
701 | if (otg_irq & OPRT_CHG) { | |
f35ae634 | 702 | omap_writew(OPRT_CHG, OTG_IRQ_SRC); |
1da177e4 LT |
703 | isp1301_defer_work(isp, WORK_UPDATE_ISP); |
704 | ret = IRQ_HANDLED; | |
705 | ||
706 | /* SRP to become b_peripheral failed */ | |
707 | } else if (otg_irq & B_SRP_TMROUT) { | |
f35ae634 | 708 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL)); |
1da177e4 LT |
709 | notresponding(isp); |
710 | ||
711 | /* gadget drivers that care should monitor all kinds of | |
712 | * remote wakeup (SRP, normal) using their own timer | |
713 | * to give "check cable and A-device" messages. | |
714 | */ | |
715 | if (isp->otg.state == OTG_STATE_B_SRP_INIT) | |
716 | b_idle(isp, "srp_timeout"); | |
717 | ||
f35ae634 | 718 | omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
719 | ret = IRQ_HANDLED; |
720 | ||
721 | /* HNP to become b_host failed */ | |
722 | } else if (otg_irq & B_HNP_FAIL) { | |
723 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", | |
f35ae634 | 724 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
725 | notresponding(isp); |
726 | ||
f35ae634 | 727 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
728 | otg_ctrl |= OTG_BUSDROP; |
729 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 730 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
731 | |
732 | /* subset of b_peripheral()... */ | |
733 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
734 | pr_debug(" --> b_peripheral\n"); | |
735 | ||
f35ae634 | 736 | omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); |
1da177e4 LT |
737 | ret = IRQ_HANDLED; |
738 | ||
739 | /* detect SRP from B-device ... */ | |
740 | } else if (otg_irq & A_SRP_DETECT) { | |
741 | pr_debug("otg: %s SRP_DETECT, %06x\n", | |
f35ae634 | 742 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
743 | |
744 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
745 | switch (isp->otg.state) { | |
746 | case OTG_STATE_A_IDLE: | |
747 | if (!isp->otg.host) | |
748 | break; | |
749 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
f35ae634 | 750 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
751 | otg_ctrl |= OTG_A_BUSREQ; |
752 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
753 | & ~OTG_XCEIV_INPUTS | |
754 | & OTG_CTRL_MASK; | |
f35ae634 | 755 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
756 | break; |
757 | default: | |
758 | break; | |
759 | } | |
760 | ||
f35ae634 | 761 | omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); |
1da177e4 LT |
762 | ret = IRQ_HANDLED; |
763 | ||
764 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) | |
765 | * we don't track them separately | |
766 | */ | |
767 | } else if (otg_irq & A_REQ_TMROUT) { | |
f35ae634 | 768 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
769 | pr_info("otg: BCON_TMOUT from %s, %06x\n", |
770 | state_name(isp), otg_ctrl); | |
771 | notresponding(isp); | |
772 | ||
773 | otg_ctrl |= OTG_BUSDROP; | |
774 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 775 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
776 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; |
777 | ||
f35ae634 | 778 | omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
779 | ret = IRQ_HANDLED; |
780 | ||
781 | /* A-supplied voltage fell too low; overcurrent */ | |
782 | } else if (otg_irq & A_VBUS_ERR) { | |
f35ae634 | 783 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
784 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", |
785 | state_name(isp), otg_irq, otg_ctrl); | |
786 | ||
787 | otg_ctrl |= OTG_BUSDROP; | |
788 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 789 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
790 | isp->otg.state = OTG_STATE_A_VBUS_ERR; |
791 | ||
f35ae634 | 792 | omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); |
1da177e4 LT |
793 | ret = IRQ_HANDLED; |
794 | ||
795 | /* switch driver; the transciever code activates it, | |
796 | * ungating the udc clock or resuming OHCI. | |
797 | */ | |
798 | } else if (otg_irq & DRIVER_SWITCH) { | |
799 | int kick = 0; | |
800 | ||
f35ae634 | 801 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
802 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", |
803 | state_name(isp), | |
804 | (otg_ctrl & OTG_DRIVER_SEL) | |
805 | ? "gadget" : "host", | |
806 | otg_ctrl); | |
807 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
808 | ||
809 | /* role is peripheral */ | |
810 | if (otg_ctrl & OTG_DRIVER_SEL) { | |
811 | switch (isp->otg.state) { | |
812 | case OTG_STATE_A_IDLE: | |
08882d20 | 813 | b_idle(isp, __func__); |
1da177e4 LT |
814 | break; |
815 | default: | |
816 | break; | |
817 | } | |
818 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
819 | ||
820 | /* role is host */ | |
821 | } else { | |
822 | if (!(otg_ctrl & OTG_ID)) { | |
25da383d | 823 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
f35ae634 | 824 | omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL); |
1da177e4 LT |
825 | } |
826 | ||
827 | if (isp->otg.host) { | |
828 | switch (isp->otg.state) { | |
829 | case OTG_STATE_B_WAIT_ACON: | |
830 | isp->otg.state = OTG_STATE_B_HOST; | |
831 | pr_debug(" --> b_host\n"); | |
832 | kick = 1; | |
833 | break; | |
834 | case OTG_STATE_A_WAIT_BCON: | |
835 | isp->otg.state = OTG_STATE_A_HOST; | |
836 | pr_debug(" --> a_host\n"); | |
837 | break; | |
838 | case OTG_STATE_A_PERIPHERAL: | |
839 | isp->otg.state = OTG_STATE_A_WAIT_BCON; | |
840 | pr_debug(" --> a_wait_bcon\n"); | |
841 | break; | |
842 | default: | |
843 | break; | |
844 | } | |
845 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
846 | } | |
847 | } | |
848 | ||
f35ae634 | 849 | omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); |
1da177e4 LT |
850 | ret = IRQ_HANDLED; |
851 | ||
852 | if (kick) | |
853 | usb_bus_start_enum(isp->otg.host, | |
854 | isp->otg.host->otg_port); | |
855 | } | |
856 | ||
08882d20 | 857 | check_state(isp, __func__); |
1da177e4 LT |
858 | return ret; |
859 | } | |
860 | ||
861 | static struct platform_device *otg_dev; | |
862 | ||
863 | static int otg_init(struct isp1301 *isp) | |
864 | { | |
f35ae634 TL |
865 | u32 l; |
866 | ||
1da177e4 LT |
867 | if (!otg_dev) |
868 | return -ENODEV; | |
869 | ||
08882d20 | 870 | dump_regs(isp, __func__); |
1da177e4 | 871 | /* some of these values are board-specific... */ |
f35ae634 TL |
872 | l = omap_readl(OTG_SYSCON_2); |
873 | l |= OTG_EN | |
1da177e4 LT |
874 | /* for B-device: */ |
875 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ | |
876 | | SRP_GPDVBUS /* discharge after VBUS pulse */ | |
877 | // | (3 << 24) /* 2msec VBUS pulse */ | |
878 | /* for A-device: */ | |
879 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ | |
880 | | SRP_DPW /* detect 167+ns SRP pulses */ | |
881 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ | |
882 | ; | |
f35ae634 | 883 | omap_writel(l, OTG_SYSCON_2); |
1da177e4 LT |
884 | |
885 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
886 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
887 | ||
08882d20 | 888 | check_state(isp, __func__); |
1da177e4 | 889 | pr_debug("otg: %s, %s %06x\n", |
f35ae634 | 890 | state_name(isp), __func__, omap_readl(OTG_CTRL)); |
1da177e4 | 891 | |
f35ae634 | 892 | omap_writew(DRIVER_SWITCH | OPRT_CHG |
1da177e4 | 893 | | B_SRP_TMROUT | B_HNP_FAIL |
f35ae634 TL |
894 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN); |
895 | ||
896 | l = omap_readl(OTG_SYSCON_2); | |
897 | l |= OTG_EN; | |
898 | omap_writel(l, OTG_SYSCON_2); | |
1da177e4 LT |
899 | |
900 | return 0; | |
901 | } | |
902 | ||
3ae5eaec | 903 | static int otg_probe(struct platform_device *dev) |
1da177e4 LT |
904 | { |
905 | // struct omap_usb_config *config = dev->platform_data; | |
906 | ||
3ae5eaec | 907 | otg_dev = dev; |
1da177e4 LT |
908 | return 0; |
909 | } | |
910 | ||
3ae5eaec | 911 | static int otg_remove(struct platform_device *dev) |
1da177e4 | 912 | { |
d1846b0e | 913 | otg_dev = NULL; |
1da177e4 LT |
914 | return 0; |
915 | } | |
916 | ||
d1846b0e | 917 | static struct platform_driver omap_otg_driver = { |
1da177e4 | 918 | .probe = otg_probe, |
3ae5eaec RK |
919 | .remove = otg_remove, |
920 | .driver = { | |
921 | .owner = THIS_MODULE, | |
922 | .name = "omap_otg", | |
923 | }, | |
1da177e4 LT |
924 | }; |
925 | ||
926 | static int otg_bind(struct isp1301 *isp) | |
927 | { | |
928 | int status; | |
929 | ||
930 | if (otg_dev) | |
931 | return -EBUSY; | |
932 | ||
3ae5eaec | 933 | status = platform_driver_register(&omap_otg_driver); |
1da177e4 LT |
934 | if (status < 0) |
935 | return status; | |
936 | ||
937 | if (otg_dev) | |
938 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, | |
dace1453 | 939 | IRQF_DISABLED, DRIVER_NAME, isp); |
1da177e4 LT |
940 | else |
941 | status = -ENODEV; | |
942 | ||
943 | if (status < 0) | |
3ae5eaec | 944 | platform_driver_unregister(&omap_otg_driver); |
1da177e4 LT |
945 | return status; |
946 | } | |
947 | ||
948 | static void otg_unbind(struct isp1301 *isp) | |
949 | { | |
950 | if (!otg_dev) | |
951 | return; | |
952 | free_irq(otg_dev->resource[1].start, isp); | |
953 | } | |
954 | ||
955 | #else | |
956 | ||
957 | /* OTG controller isn't clocked */ | |
958 | ||
959 | #endif /* CONFIG_USB_OTG */ | |
960 | ||
961 | /*-------------------------------------------------------------------------*/ | |
962 | ||
963 | static void b_peripheral(struct isp1301 *isp) | |
964 | { | |
f35ae634 TL |
965 | u32 l; |
966 | ||
967 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; | |
968 | omap_writel(l, OTG_CTRL); | |
969 | ||
1da177e4 LT |
970 | usb_gadget_vbus_connect(isp->otg.gadget); |
971 | ||
972 | #ifdef CONFIG_USB_OTG | |
973 | enable_vbus_draw(isp, 8); | |
974 | otg_update_isp(isp); | |
975 | #else | |
976 | enable_vbus_draw(isp, 100); | |
977 | /* UDC driver just set OTG_BSESSVLD */ | |
978 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); | |
979 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); | |
980 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
981 | pr_debug(" --> b_peripheral\n"); | |
982 | dump_regs(isp, "2periph"); | |
983 | #endif | |
984 | } | |
985 | ||
986 | static void isp_update_otg(struct isp1301 *isp, u8 stat) | |
987 | { | |
988 | u8 isp_stat, isp_bstat; | |
989 | enum usb_otg_state state = isp->otg.state; | |
990 | ||
991 | if (stat & INTR_BDIS_ACON) | |
992 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); | |
993 | ||
994 | /* start certain state transitions right away */ | |
995 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
996 | if (isp_stat & INTR_ID_GND) { | |
997 | if (isp->otg.default_a) { | |
998 | switch (state) { | |
999 | case OTG_STATE_B_IDLE: | |
1000 | a_idle(isp, "idle"); | |
1001 | /* FALLTHROUGH */ | |
1002 | case OTG_STATE_A_IDLE: | |
1003 | enable_vbus_source(isp); | |
1004 | /* FALLTHROUGH */ | |
1005 | case OTG_STATE_A_WAIT_VRISE: | |
1006 | /* we skip over OTG_STATE_A_WAIT_BCON, since | |
1007 | * the HC will transition to A_HOST (or | |
1008 | * A_SUSPEND!) without our noticing except | |
1009 | * when HNP is used. | |
1010 | */ | |
1011 | if (isp_stat & INTR_VBUS_VLD) | |
1012 | isp->otg.state = OTG_STATE_A_HOST; | |
1013 | break; | |
1014 | case OTG_STATE_A_WAIT_VFALL: | |
1015 | if (!(isp_stat & INTR_SESS_VLD)) | |
1016 | a_idle(isp, "vfell"); | |
1017 | break; | |
1018 | default: | |
1019 | if (!(isp_stat & INTR_VBUS_VLD)) | |
1020 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
1021 | break; | |
1022 | } | |
1023 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1024 | } else { | |
1025 | switch (state) { | |
1026 | case OTG_STATE_B_PERIPHERAL: | |
1027 | case OTG_STATE_B_HOST: | |
1028 | case OTG_STATE_B_WAIT_ACON: | |
1029 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
1030 | break; | |
1031 | default: | |
1032 | break; | |
1033 | } | |
1034 | if (state != OTG_STATE_A_IDLE) | |
1035 | a_idle(isp, "id"); | |
1036 | if (isp->otg.host && state == OTG_STATE_A_IDLE) | |
1037 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
1038 | isp_bstat = 0; | |
1039 | } | |
1040 | } else { | |
f35ae634 TL |
1041 | u32 l; |
1042 | ||
1da177e4 LT |
1043 | /* if user unplugged mini-A end of cable, |
1044 | * don't bypass A_WAIT_VFALL. | |
1045 | */ | |
1046 | if (isp->otg.default_a) { | |
1047 | switch (state) { | |
1048 | default: | |
1049 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
1050 | break; | |
1051 | case OTG_STATE_A_WAIT_VFALL: | |
1052 | state = OTG_STATE_A_IDLE; | |
1053 | /* khubd may take a while to notice and | |
1054 | * handle this disconnect, so don't go | |
1055 | * to B_IDLE quite yet. | |
1056 | */ | |
1057 | break; | |
1058 | case OTG_STATE_A_IDLE: | |
1059 | host_suspend(isp); | |
1060 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, | |
1061 | MC1_BDIS_ACON_EN); | |
1062 | isp->otg.state = OTG_STATE_B_IDLE; | |
f35ae634 TL |
1063 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1064 | l &= ~OTG_CTRL_BITS; | |
1065 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1066 | break; |
1067 | case OTG_STATE_B_IDLE: | |
1068 | break; | |
1069 | } | |
1070 | } | |
1071 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1072 | ||
1073 | switch (isp->otg.state) { | |
1074 | case OTG_STATE_B_PERIPHERAL: | |
1075 | case OTG_STATE_B_WAIT_ACON: | |
1076 | case OTG_STATE_B_HOST: | |
1077 | if (likely(isp_bstat & OTG_B_SESS_VLD)) | |
1078 | break; | |
1079 | enable_vbus_draw(isp, 0); | |
1080 | #ifndef CONFIG_USB_OTG | |
1081 | /* UDC driver will clear OTG_BSESSVLD */ | |
1082 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1083 | OTG1_DP_PULLDOWN); | |
1084 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1085 | OTG1_DP_PULLUP); | |
08882d20 | 1086 | dump_regs(isp, __func__); |
1da177e4 LT |
1087 | #endif |
1088 | /* FALLTHROUGH */ | |
1089 | case OTG_STATE_B_SRP_INIT: | |
08882d20 | 1090 | b_idle(isp, __func__); |
f35ae634 TL |
1091 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
1092 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1093 | /* FALLTHROUGH */ |
1094 | case OTG_STATE_B_IDLE: | |
1095 | if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) { | |
1096 | #ifdef CONFIG_USB_OTG | |
1097 | update_otg1(isp, isp_stat); | |
1098 | update_otg2(isp, isp_bstat); | |
1099 | #endif | |
1100 | b_peripheral(isp); | |
1101 | } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) | |
1102 | isp_bstat |= OTG_B_SESS_END; | |
1103 | break; | |
1104 | case OTG_STATE_A_WAIT_VFALL: | |
1105 | break; | |
1106 | default: | |
1107 | pr_debug("otg: unsupported b-device %s\n", | |
1108 | state_name(isp)); | |
1109 | break; | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | if (state != isp->otg.state) | |
1114 | pr_debug(" isp, %s -> %s\n", | |
1115 | state_string(state), state_name(isp)); | |
1116 | ||
1117 | #ifdef CONFIG_USB_OTG | |
1118 | /* update the OTG controller state to match the isp1301; may | |
1119 | * trigger OPRT_CHG irqs for changes going to the isp1301. | |
1120 | */ | |
1121 | update_otg1(isp, isp_stat); | |
1122 | update_otg2(isp, isp_bstat); | |
08882d20 | 1123 | check_state(isp, __func__); |
1da177e4 LT |
1124 | #endif |
1125 | ||
1126 | dump_regs(isp, "isp1301->otg"); | |
1127 | } | |
1128 | ||
1129 | /*-------------------------------------------------------------------------*/ | |
1130 | ||
1131 | static u8 isp1301_clear_latch(struct isp1301 *isp) | |
1132 | { | |
1133 | u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); | |
1134 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); | |
1135 | return latch; | |
1136 | } | |
1137 | ||
1138 | static void | |
25da383d | 1139 | isp1301_work(struct work_struct *work) |
1da177e4 | 1140 | { |
25da383d | 1141 | struct isp1301 *isp = container_of(work, struct isp1301, work); |
1da177e4 LT |
1142 | int stop; |
1143 | ||
1144 | /* implicit lock: we're the only task using this device */ | |
1145 | isp->working = 1; | |
1146 | do { | |
1147 | stop = test_bit(WORK_STOP, &isp->todo); | |
1148 | ||
1149 | #ifdef CONFIG_USB_OTG | |
1150 | /* transfer state from otg engine to isp1301 */ | |
1151 | if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { | |
1152 | otg_update_isp(isp); | |
a5f08a32 | 1153 | put_device(&isp->client->dev); |
1da177e4 LT |
1154 | } |
1155 | #endif | |
1156 | /* transfer state from isp1301 to otg engine */ | |
1157 | if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { | |
1158 | u8 stat = isp1301_clear_latch(isp); | |
1159 | ||
1160 | isp_update_otg(isp, stat); | |
a5f08a32 | 1161 | put_device(&isp->client->dev); |
1da177e4 LT |
1162 | } |
1163 | ||
1164 | if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { | |
1165 | u32 otg_ctrl; | |
1166 | ||
1167 | /* | |
1168 | * skip A_WAIT_VRISE; hc transitions invisibly | |
1169 | * skip A_WAIT_BCON; same. | |
1170 | */ | |
1171 | switch (isp->otg.state) { | |
1172 | case OTG_STATE_A_WAIT_BCON: | |
1173 | case OTG_STATE_A_WAIT_VRISE: | |
1174 | isp->otg.state = OTG_STATE_A_HOST; | |
1175 | pr_debug(" --> a_host\n"); | |
f35ae634 | 1176 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1177 | otg_ctrl |= OTG_A_BUSREQ; |
1178 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
1179 | & OTG_CTRL_MASK; | |
f35ae634 | 1180 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
1181 | break; |
1182 | case OTG_STATE_B_WAIT_ACON: | |
1183 | isp->otg.state = OTG_STATE_B_HOST; | |
1184 | pr_debug(" --> b_host (acon)\n"); | |
1185 | break; | |
1186 | case OTG_STATE_B_HOST: | |
1187 | case OTG_STATE_B_IDLE: | |
1188 | case OTG_STATE_A_IDLE: | |
1189 | break; | |
1190 | default: | |
1191 | pr_debug(" host resume in %s\n", | |
1192 | state_name(isp)); | |
1193 | } | |
1194 | host_resume(isp); | |
1195 | // mdelay(10); | |
a5f08a32 | 1196 | put_device(&isp->client->dev); |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { | |
1200 | #ifdef VERBOSE | |
1201 | dump_regs(isp, "timer"); | |
1202 | if (!stop) | |
1203 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1204 | #endif | |
a5f08a32 | 1205 | put_device(&isp->client->dev); |
1da177e4 LT |
1206 | } |
1207 | ||
1208 | if (isp->todo) | |
a5f08a32 | 1209 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
1210 | "work done, todo = 0x%lx\n", |
1211 | isp->todo); | |
1212 | if (stop) { | |
a5f08a32 | 1213 | dev_dbg(&isp->client->dev, "stop\n"); |
1da177e4 LT |
1214 | break; |
1215 | } | |
1216 | } while (isp->todo); | |
1217 | isp->working = 0; | |
1218 | } | |
1219 | ||
7d12e780 | 1220 | static irqreturn_t isp1301_irq(int irq, void *isp) |
1da177e4 LT |
1221 | { |
1222 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
1223 | return IRQ_HANDLED; | |
1224 | } | |
1225 | ||
1226 | static void isp1301_timer(unsigned long _isp) | |
1227 | { | |
1228 | isp1301_defer_work((void *)_isp, WORK_TIMER); | |
1229 | } | |
1230 | ||
1231 | /*-------------------------------------------------------------------------*/ | |
1232 | ||
1233 | static void isp1301_release(struct device *dev) | |
1234 | { | |
1235 | struct isp1301 *isp; | |
1236 | ||
a5f08a32 | 1237 | isp = dev_get_drvdata(dev); |
1da177e4 | 1238 | |
d1846b0e DB |
1239 | /* FIXME -- not with a "new style" driver, it doesn't!! */ |
1240 | ||
1da177e4 LT |
1241 | /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ |
1242 | if (isp->i2c_release) | |
1243 | isp->i2c_release(dev); | |
1244 | kfree (isp); | |
1245 | } | |
1246 | ||
1247 | static struct isp1301 *the_transceiver; | |
1248 | ||
9df013b3 | 1249 | static int __exit isp1301_remove(struct i2c_client *i2c) |
1da177e4 LT |
1250 | { |
1251 | struct isp1301 *isp; | |
1252 | ||
a5f08a32 | 1253 | isp = i2c_get_clientdata(i2c); |
1da177e4 LT |
1254 | |
1255 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1256 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
9df013b3 | 1257 | free_irq(i2c->irq, isp); |
1da177e4 LT |
1258 | #ifdef CONFIG_USB_OTG |
1259 | otg_unbind(isp); | |
1260 | #endif | |
1261 | if (machine_is_omap_h2()) | |
d1846b0e | 1262 | gpio_free(2); |
1da177e4 LT |
1263 | |
1264 | isp->timer.data = 0; | |
1265 | set_bit(WORK_STOP, &isp->todo); | |
1266 | del_timer_sync(&isp->timer); | |
1267 | flush_scheduled_work(); | |
1268 | ||
1269 | put_device(&i2c->dev); | |
d1846b0e | 1270 | the_transceiver = NULL; |
1da177e4 | 1271 | |
9df013b3 | 1272 | return 0; |
1da177e4 LT |
1273 | } |
1274 | ||
1275 | /*-------------------------------------------------------------------------*/ | |
1276 | ||
1277 | /* NOTE: three modes are possible here, only one of which | |
1278 | * will be standards-conformant on any given system: | |
1279 | * | |
1280 | * - OTG mode (dual-role), required if there's a Mini-AB connector | |
1281 | * - HOST mode, for when there's one or more A (host) connectors | |
1282 | * - DEVICE mode, for when there's a B/Mini-B (device) connector | |
1283 | * | |
1284 | * As a rule, you won't have an isp1301 chip unless it's there to | |
25da383d | 1285 | * support the OTG mode. Other modes help testing USB controllers |
1da177e4 LT |
1286 | * in isolation from (full) OTG support, or maybe so later board |
1287 | * revisions can help to support those feature. | |
1288 | */ | |
1289 | ||
1290 | #ifdef CONFIG_USB_OTG | |
1291 | ||
1292 | static int isp1301_otg_enable(struct isp1301 *isp) | |
1293 | { | |
1294 | power_up(isp); | |
1295 | otg_init(isp); | |
1296 | ||
1297 | /* NOTE: since we don't change this, this provides | |
1298 | * a few more interrupts than are strictly needed. | |
1299 | */ | |
1300 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1301 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1302 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1303 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1304 | |
a5f08a32 | 1305 | dev_info(&isp->client->dev, "ready for dual-role USB ...\n"); |
1da177e4 LT |
1306 | |
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | #endif | |
1311 | ||
1312 | /* add or disable the host device+driver */ | |
1313 | static int | |
1314 | isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host) | |
1315 | { | |
1316 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
1317 | ||
1318 | if (!otg || isp != the_transceiver) | |
1319 | return -ENODEV; | |
1320 | ||
1321 | if (!host) { | |
f35ae634 | 1322 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 | 1323 | power_down(isp); |
d1846b0e | 1324 | isp->otg.host = NULL; |
1da177e4 LT |
1325 | return 0; |
1326 | } | |
1327 | ||
1328 | #ifdef CONFIG_USB_OTG | |
1329 | isp->otg.host = host; | |
a5f08a32 | 1330 | dev_dbg(&isp->client->dev, "registered host\n"); |
1da177e4 LT |
1331 | host_suspend(isp); |
1332 | if (isp->otg.gadget) | |
1333 | return isp1301_otg_enable(isp); | |
1334 | return 0; | |
1335 | ||
1336 | #elif !defined(CONFIG_USB_GADGET_OMAP) | |
1337 | // FIXME update its refcount | |
1338 | isp->otg.host = host; | |
1339 | ||
1340 | power_up(isp); | |
1341 | ||
1342 | if (machine_is_omap_h2()) | |
1343 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1344 | ||
a5f08a32 | 1345 | dev_info(&isp->client->dev, "A-Host sessions ok\n"); |
1da177e4 | 1346 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, |
25da383d | 1347 | INTR_ID_GND); |
1da177e4 | 1348 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1349 | INTR_ID_GND); |
1da177e4 LT |
1350 | |
1351 | /* If this has a Mini-AB connector, this mode is highly | |
1352 | * nonstandard ... but can be handy for testing, especially with | |
1353 | * the Mini-A end of an OTG cable. (Or something nonstandard | |
1354 | * like MiniB-to-StandardB, maybe built with a gender mender.) | |
1355 | */ | |
1356 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); | |
1357 | ||
08882d20 | 1358 | dump_regs(isp, __func__); |
1da177e4 LT |
1359 | |
1360 | return 0; | |
1361 | ||
1362 | #else | |
a5f08a32 | 1363 | dev_dbg(&isp->client->dev, "host sessions not allowed\n"); |
1da177e4 LT |
1364 | return -EINVAL; |
1365 | #endif | |
1366 | ||
1367 | } | |
1368 | ||
1369 | static int | |
1370 | isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) | |
1371 | { | |
1372 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
d1846b0e | 1373 | #ifndef CONFIG_USB_OTG |
f35ae634 | 1374 | u32 l; |
d1846b0e | 1375 | #endif |
1da177e4 LT |
1376 | |
1377 | if (!otg || isp != the_transceiver) | |
1378 | return -ENODEV; | |
1379 | ||
1380 | if (!gadget) { | |
f35ae634 | 1381 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 LT |
1382 | if (!isp->otg.default_a) |
1383 | enable_vbus_draw(isp, 0); | |
1384 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
d1846b0e | 1385 | isp->otg.gadget = NULL; |
1da177e4 LT |
1386 | power_down(isp); |
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | #ifdef CONFIG_USB_OTG | |
1391 | isp->otg.gadget = gadget; | |
a5f08a32 | 1392 | dev_dbg(&isp->client->dev, "registered gadget\n"); |
1da177e4 LT |
1393 | /* gadget driver may be suspended until vbus_connect () */ |
1394 | if (isp->otg.host) | |
1395 | return isp1301_otg_enable(isp); | |
1396 | return 0; | |
1397 | ||
1398 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) | |
1399 | isp->otg.gadget = gadget; | |
1400 | // FIXME update its refcount | |
1401 | ||
f35ae634 TL |
1402 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1403 | l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS); | |
1404 | l |= OTG_ID; | |
1405 | omap_writel(l, OTG_CTRL); | |
1406 | ||
1da177e4 LT |
1407 | power_up(isp); |
1408 | isp->otg.state = OTG_STATE_B_IDLE; | |
1409 | ||
d1846b0e | 1410 | if (machine_is_omap_h2() || machine_is_omap_h3()) |
1da177e4 LT |
1411 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); |
1412 | ||
1413 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1414 | INTR_SESS_VLD); |
1da177e4 | 1415 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1416 | INTR_VBUS_VLD); |
a5f08a32 | 1417 | dev_info(&isp->client->dev, "B-Peripheral sessions ok\n"); |
08882d20 | 1418 | dump_regs(isp, __func__); |
1da177e4 LT |
1419 | |
1420 | /* If this has a Mini-AB connector, this mode is highly | |
1421 | * nonstandard ... but can be handy for testing, so long | |
1422 | * as you don't plug a Mini-A cable into the jack. | |
1423 | */ | |
1424 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) | |
1425 | b_peripheral(isp); | |
1426 | ||
1427 | return 0; | |
1428 | ||
1429 | #else | |
a5f08a32 | 1430 | dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n"); |
1da177e4 LT |
1431 | return -EINVAL; |
1432 | #endif | |
1433 | } | |
1434 | ||
1435 | ||
1436 | /*-------------------------------------------------------------------------*/ | |
1437 | ||
1438 | static int | |
1439 | isp1301_set_power(struct otg_transceiver *dev, unsigned mA) | |
1440 | { | |
1441 | if (!the_transceiver) | |
1442 | return -ENODEV; | |
1443 | if (dev->state == OTG_STATE_B_PERIPHERAL) | |
1444 | enable_vbus_draw(the_transceiver, mA); | |
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | static int | |
1449 | isp1301_start_srp(struct otg_transceiver *dev) | |
1450 | { | |
1451 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1452 | u32 otg_ctrl; | |
1453 | ||
1454 | if (!dev || isp != the_transceiver | |
1455 | || isp->otg.state != OTG_STATE_B_IDLE) | |
1456 | return -ENODEV; | |
1457 | ||
f35ae634 | 1458 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1459 | if (!(otg_ctrl & OTG_BSESSEND)) |
1460 | return -EINVAL; | |
1461 | ||
1462 | otg_ctrl |= OTG_B_BUSREQ; | |
1463 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; | |
f35ae634 | 1464 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
1465 | isp->otg.state = OTG_STATE_B_SRP_INIT; |
1466 | ||
f35ae634 TL |
1467 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), |
1468 | omap_readl(OTG_CTRL)); | |
1da177e4 | 1469 | #ifdef CONFIG_USB_OTG |
08882d20 | 1470 | check_state(isp, __func__); |
1da177e4 LT |
1471 | #endif |
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | static int | |
1476 | isp1301_start_hnp(struct otg_transceiver *dev) | |
1477 | { | |
1478 | #ifdef CONFIG_USB_OTG | |
1479 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
f35ae634 | 1480 | u32 l; |
1da177e4 LT |
1481 | |
1482 | if (!dev || isp != the_transceiver) | |
1483 | return -ENODEV; | |
1484 | if (isp->otg.default_a && (isp->otg.host == NULL | |
1485 | || !isp->otg.host->b_hnp_enable)) | |
1486 | return -ENOTCONN; | |
1487 | if (!isp->otg.default_a && (isp->otg.gadget == NULL | |
1488 | || !isp->otg.gadget->b_hnp_enable)) | |
1489 | return -ENOTCONN; | |
1490 | ||
1491 | /* We want hardware to manage most HNP protocol timings. | |
1492 | * So do this part as early as possible... | |
1493 | */ | |
1494 | switch (isp->otg.state) { | |
1495 | case OTG_STATE_B_HOST: | |
1496 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
1497 | /* caller will suspend next */ | |
1498 | break; | |
1499 | case OTG_STATE_A_HOST: | |
1500 | #if 0 | |
1501 | /* autoconnect mode avoids irq latency bugs */ | |
1502 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1503 | MC1_BDIS_ACON_EN); | |
1504 | #endif | |
1505 | /* caller must suspend then clear A_BUSREQ */ | |
1506 | usb_gadget_vbus_connect(isp->otg.gadget); | |
f35ae634 TL |
1507 | l = omap_readl(OTG_CTRL); |
1508 | l |= OTG_A_SETB_HNPEN; | |
1509 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1510 | |
1511 | break; | |
1512 | case OTG_STATE_A_PERIPHERAL: | |
1513 | /* initiated by B-Host suspend */ | |
1514 | break; | |
1515 | default: | |
1516 | return -EILSEQ; | |
1517 | } | |
1518 | pr_debug("otg: HNP %s, %06x ...\n", | |
f35ae634 | 1519 | state_name(isp), omap_readl(OTG_CTRL)); |
08882d20 | 1520 | check_state(isp, __func__); |
1da177e4 LT |
1521 | return 0; |
1522 | #else | |
1523 | /* srp-only */ | |
1524 | return -EINVAL; | |
1525 | #endif | |
1526 | } | |
1527 | ||
1528 | /*-------------------------------------------------------------------------*/ | |
1529 | ||
d1846b0e DB |
1530 | static int __init |
1531 | isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id) | |
1da177e4 LT |
1532 | { |
1533 | int status; | |
1534 | struct isp1301 *isp; | |
1da177e4 LT |
1535 | |
1536 | if (the_transceiver) | |
1537 | return 0; | |
1538 | ||
82ca76b6 | 1539 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
1da177e4 LT |
1540 | if (!isp) |
1541 | return 0; | |
1542 | ||
25da383d | 1543 | INIT_WORK(&isp->work, isp1301_work); |
1da177e4 LT |
1544 | init_timer(&isp->timer); |
1545 | isp->timer.function = isp1301_timer; | |
1546 | isp->timer.data = (unsigned long) isp; | |
1547 | ||
9df013b3 JD |
1548 | i2c_set_clientdata(i2c, isp); |
1549 | isp->client = i2c; | |
1da177e4 | 1550 | |
9df013b3 JD |
1551 | /* verify the chip (shouldn't be necesary) */ |
1552 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); | |
1553 | if (status != I2C_VENDOR_ID_PHILIPS) { | |
1554 | dev_dbg(&i2c->dev, "not philips id: %d\n", status); | |
1555 | goto fail; | |
1556 | } | |
1557 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); | |
1558 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { | |
1559 | dev_dbg(&i2c->dev, "not isp1301, %d\n", status); | |
1560 | goto fail; | |
1da177e4 LT |
1561 | } |
1562 | isp->i2c_release = i2c->dev.release; | |
1563 | i2c->dev.release = isp1301_release; | |
1564 | ||
1565 | /* initial development used chiprev 2.00 */ | |
1566 | status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); | |
1567 | dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", | |
1568 | status >> 8, status & 0xff); | |
1569 | ||
1570 | /* make like power-on reset */ | |
1571 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); | |
1572 | ||
1573 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); | |
1574 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); | |
1575 | ||
1576 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1577 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); | |
1578 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1579 | ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
1580 | ||
1581 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); | |
1582 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1583 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1584 | ||
1585 | #ifdef CONFIG_USB_OTG | |
1586 | status = otg_bind(isp); | |
1587 | if (status < 0) { | |
1588 | dev_dbg(&i2c->dev, "can't bind OTG\n"); | |
9df013b3 | 1589 | goto fail; |
1da177e4 LT |
1590 | } |
1591 | #endif | |
1592 | ||
1593 | if (machine_is_omap_h2()) { | |
1594 | /* full speed signaling by default */ | |
1595 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
cbbcb9b0 | 1596 | MC1_SPEED); |
1da177e4 LT |
1597 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, |
1598 | MC2_SPD_SUSP_CTRL); | |
1599 | ||
1600 | /* IRQ wired at M14 */ | |
1601 | omap_cfg_reg(M14_1510_GPIO2); | |
25da383d DB |
1602 | if (gpio_request(2, "isp1301") == 0) |
1603 | gpio_direction_input(2); | |
1604 | isp->irq_type = IRQF_TRIGGER_FALLING; | |
1da177e4 LT |
1605 | } |
1606 | ||
25da383d | 1607 | isp->irq_type |= IRQF_SAMPLE_RANDOM; |
9df013b3 | 1608 | status = request_irq(i2c->irq, isp1301_irq, |
25da383d | 1609 | isp->irq_type, DRIVER_NAME, isp); |
1da177e4 LT |
1610 | if (status < 0) { |
1611 | dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", | |
9df013b3 JD |
1612 | i2c->irq, status); |
1613 | goto fail; | |
1da177e4 LT |
1614 | } |
1615 | ||
9df013b3 | 1616 | isp->otg.dev = &i2c->dev; |
1da177e4 LT |
1617 | isp->otg.label = DRIVER_NAME; |
1618 | ||
1619 | isp->otg.set_host = isp1301_set_host, | |
1620 | isp->otg.set_peripheral = isp1301_set_peripheral, | |
1621 | isp->otg.set_power = isp1301_set_power, | |
1622 | isp->otg.start_srp = isp1301_start_srp, | |
1623 | isp->otg.start_hnp = isp1301_start_hnp, | |
1624 | ||
1625 | enable_vbus_draw(isp, 0); | |
1626 | power_down(isp); | |
1627 | the_transceiver = isp; | |
1628 | ||
1629 | #ifdef CONFIG_USB_OTG | |
1630 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
1631 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
1632 | #endif | |
1633 | ||
08882d20 | 1634 | dump_regs(isp, __func__); |
1da177e4 LT |
1635 | |
1636 | #ifdef VERBOSE | |
1637 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1638 | dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); | |
1639 | #endif | |
1640 | ||
1641 | status = otg_set_transceiver(&isp->otg); | |
1642 | if (status < 0) | |
1643 | dev_err(&i2c->dev, "can't register transceiver, %d\n", | |
1644 | status); | |
1645 | ||
1646 | return 0; | |
1da177e4 | 1647 | |
9df013b3 JD |
1648 | fail: |
1649 | kfree(isp); | |
1650 | return -ENODEV; | |
1da177e4 LT |
1651 | } |
1652 | ||
9df013b3 JD |
1653 | static const struct i2c_device_id isp1301_id[] = { |
1654 | { "isp1301_omap", 0 }, | |
1655 | { } | |
1656 | }; | |
1657 | MODULE_DEVICE_TABLE(i2c, isp1301_id); | |
1658 | ||
1da177e4 | 1659 | static struct i2c_driver isp1301_driver = { |
a9718b0c | 1660 | .driver = { |
a9718b0c LR |
1661 | .name = "isp1301_omap", |
1662 | }, | |
9df013b3 JD |
1663 | .probe = isp1301_probe, |
1664 | .remove = __exit_p(isp1301_remove), | |
1665 | .id_table = isp1301_id, | |
1da177e4 LT |
1666 | }; |
1667 | ||
1668 | /*-------------------------------------------------------------------------*/ | |
1669 | ||
1670 | static int __init isp_init(void) | |
1671 | { | |
1672 | return i2c_add_driver(&isp1301_driver); | |
1673 | } | |
1674 | module_init(isp_init); | |
1675 | ||
1676 | static void __exit isp_exit(void) | |
1677 | { | |
1678 | if (the_transceiver) | |
d1846b0e | 1679 | otg_set_transceiver(NULL); |
1da177e4 LT |
1680 | i2c_del_driver(&isp1301_driver); |
1681 | } | |
1682 | module_exit(isp_exit); | |
1683 |