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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 FB |
52 | struct i2c_client *client; |
53 | struct i2c_client c; | |
1da177e4 LT |
54 | void (*i2c_release)(struct device *dev); |
55 | ||
56 | int irq; | |
25da383d | 57 | int irq_type; |
1da177e4 LT |
58 | |
59 | u32 last_otg_ctrl; | |
60 | unsigned working:1; | |
61 | ||
62 | struct timer_list timer; | |
63 | ||
64 | /* use keventd context to change the state for us */ | |
65 | struct work_struct work; | |
25da383d | 66 | |
1da177e4 LT |
67 | unsigned long todo; |
68 | # define WORK_UPDATE_ISP 0 /* update ISP from OTG */ | |
69 | # define WORK_UPDATE_OTG 1 /* update OTG from ISP */ | |
70 | # define WORK_HOST_RESUME 4 /* resume host */ | |
71 | # define WORK_TIMER 6 /* timer fired */ | |
72 | # define WORK_STOP 7 /* don't resubmit */ | |
73 | }; | |
74 | ||
75 | ||
f35ae634 | 76 | /* bits in OTG_CTRL */ |
1da177e4 LT |
77 | |
78 | #define OTG_XCEIV_OUTPUTS \ | |
79 | (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) | |
80 | #define OTG_XCEIV_INPUTS \ | |
81 | (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) | |
82 | #define OTG_CTRL_BITS \ | |
83 | (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) | |
84 | /* and OTG_PULLUP is sometimes written */ | |
85 | ||
86 | #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ | |
87 | OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ | |
88 | OTG_CTRL_BITS) | |
89 | ||
90 | ||
91 | /*-------------------------------------------------------------------------*/ | |
92 | ||
93 | #ifdef CONFIG_MACH_OMAP_H2 | |
94 | ||
95 | /* board-specific PM hooks */ | |
96 | ||
25da383d | 97 | #include <asm/gpio.h> |
a09e64fb | 98 | #include <mach/mux.h> |
1da177e4 LT |
99 | #include <asm/mach-types.h> |
100 | ||
101 | ||
102 | #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE) | |
103 | ||
6d16bfb5 | 104 | #include <linux/i2c/tps65010.h> |
1da177e4 LT |
105 | |
106 | #else | |
107 | ||
108 | static inline int tps65010_set_vbus_draw(unsigned mA) | |
109 | { | |
110 | pr_debug("tps65010: draw %d mA (STUB)\n", mA); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | #endif | |
115 | ||
116 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
117 | { | |
118 | int status = tps65010_set_vbus_draw(mA); | |
119 | if (status < 0) | |
120 | pr_debug(" VBUS %d mA error %d\n", mA, status); | |
121 | } | |
122 | ||
123 | static void enable_vbus_source(struct isp1301 *isp) | |
124 | { | |
125 | /* this board won't supply more than 8mA vbus power. | |
126 | * some boards can switch a 100ma "unit load" (or more). | |
127 | */ | |
128 | } | |
129 | ||
130 | ||
131 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
132 | static inline void notresponding(struct isp1301 *isp) | |
133 | { | |
134 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
135 | } | |
136 | ||
137 | ||
138 | #endif | |
139 | ||
140 | /*-------------------------------------------------------------------------*/ | |
141 | ||
142 | /* only two addresses possible */ | |
143 | #define ISP_BASE 0x2c | |
144 | static unsigned short normal_i2c[] = { | |
145 | ISP_BASE, ISP_BASE + 1, | |
146 | I2C_CLIENT_END }; | |
1da177e4 LT |
147 | |
148 | I2C_CLIENT_INSMOD; | |
149 | ||
150 | static struct i2c_driver isp1301_driver; | |
151 | ||
152 | /* smbus apis are used for portability */ | |
153 | ||
154 | static inline u8 | |
155 | isp1301_get_u8(struct isp1301 *isp, u8 reg) | |
156 | { | |
a5f08a32 | 157 | return i2c_smbus_read_byte_data(isp->client, reg + 0); |
1da177e4 LT |
158 | } |
159 | ||
160 | static inline int | |
161 | isp1301_get_u16(struct isp1301 *isp, u8 reg) | |
162 | { | |
a5f08a32 | 163 | return i2c_smbus_read_word_data(isp->client, reg); |
1da177e4 LT |
164 | } |
165 | ||
166 | static inline int | |
167 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
168 | { | |
a5f08a32 | 169 | return i2c_smbus_write_byte_data(isp->client, reg + 0, bits); |
1da177e4 LT |
170 | } |
171 | ||
172 | static inline int | |
173 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
174 | { | |
a5f08a32 | 175 | return i2c_smbus_write_byte_data(isp->client, reg + 1, bits); |
1da177e4 LT |
176 | } |
177 | ||
178 | /*-------------------------------------------------------------------------*/ | |
179 | ||
180 | /* identification */ | |
181 | #define ISP1301_VENDOR_ID 0x00 /* u16 read */ | |
182 | #define ISP1301_PRODUCT_ID 0x02 /* u16 read */ | |
183 | #define ISP1301_BCD_DEVICE 0x14 /* u16 read */ | |
184 | ||
185 | #define I2C_VENDOR_ID_PHILIPS 0x04cc | |
186 | #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 | |
187 | ||
188 | /* operational registers */ | |
189 | #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ | |
f35ae634 TL |
190 | # define MC1_SPEED (1 << 0) |
191 | # define MC1_SUSPEND (1 << 1) | |
1da177e4 LT |
192 | # define MC1_DAT_SE0 (1 << 2) |
193 | # define MC1_TRANSPARENT (1 << 3) | |
194 | # define MC1_BDIS_ACON_EN (1 << 4) | |
195 | # define MC1_OE_INT_EN (1 << 5) | |
196 | # define MC1_UART_EN (1 << 6) | |
197 | # define MC1_MASK 0x7f | |
198 | #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ | |
199 | # define MC2_GLOBAL_PWR_DN (1 << 0) | |
200 | # define MC2_SPD_SUSP_CTRL (1 << 1) | |
201 | # define MC2_BI_DI (1 << 2) | |
202 | # define MC2_TRANSP_BDIR0 (1 << 3) | |
203 | # define MC2_TRANSP_BDIR1 (1 << 4) | |
204 | # define MC2_AUDIO_EN (1 << 5) | |
205 | # define MC2_PSW_EN (1 << 6) | |
206 | # define MC2_EN2V7 (1 << 7) | |
207 | #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ | |
208 | # define OTG1_DP_PULLUP (1 << 0) | |
209 | # define OTG1_DM_PULLUP (1 << 1) | |
210 | # define OTG1_DP_PULLDOWN (1 << 2) | |
211 | # define OTG1_DM_PULLDOWN (1 << 3) | |
212 | # define OTG1_ID_PULLDOWN (1 << 4) | |
213 | # define OTG1_VBUS_DRV (1 << 5) | |
214 | # define OTG1_VBUS_DISCHRG (1 << 6) | |
215 | # define OTG1_VBUS_CHRG (1 << 7) | |
216 | #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ | |
217 | # define OTG_B_SESS_END (1 << 6) | |
218 | # define OTG_B_SESS_VLD (1 << 7) | |
219 | ||
220 | #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ | |
221 | #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ | |
222 | ||
223 | #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ | |
224 | #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ | |
225 | ||
226 | /* same bitfields in all interrupt registers */ | |
227 | # define INTR_VBUS_VLD (1 << 0) | |
228 | # define INTR_SESS_VLD (1 << 1) | |
229 | # define INTR_DP_HI (1 << 2) | |
230 | # define INTR_ID_GND (1 << 3) | |
231 | # define INTR_DM_HI (1 << 4) | |
232 | # define INTR_ID_FLOAT (1 << 5) | |
233 | # define INTR_BDIS_ACON (1 << 6) | |
234 | # define INTR_CR_INT (1 << 7) | |
235 | ||
236 | /*-------------------------------------------------------------------------*/ | |
237 | ||
238 | static const char *state_string(enum usb_otg_state state) | |
239 | { | |
240 | switch (state) { | |
241 | case OTG_STATE_A_IDLE: return "a_idle"; | |
242 | case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; | |
243 | case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; | |
244 | case OTG_STATE_A_HOST: return "a_host"; | |
245 | case OTG_STATE_A_SUSPEND: return "a_suspend"; | |
246 | case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; | |
247 | case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; | |
248 | case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; | |
249 | case OTG_STATE_B_IDLE: return "b_idle"; | |
250 | case OTG_STATE_B_SRP_INIT: return "b_srp_init"; | |
251 | case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; | |
252 | case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; | |
253 | case OTG_STATE_B_HOST: return "b_host"; | |
254 | default: return "UNDEFINED"; | |
255 | } | |
256 | } | |
257 | ||
258 | static inline const char *state_name(struct isp1301 *isp) | |
259 | { | |
260 | return state_string(isp->otg.state); | |
261 | } | |
262 | ||
1da177e4 LT |
263 | /*-------------------------------------------------------------------------*/ |
264 | ||
265 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; | |
266 | * not everything is guarded by board-specific checks, or even using | |
267 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. | |
268 | * | |
269 | * ALSO: this currently doesn't use ISP1301 low-power modes | |
270 | * while OTG is running. | |
271 | */ | |
272 | ||
273 | static void power_down(struct isp1301 *isp) | |
274 | { | |
275 | isp->otg.state = OTG_STATE_UNDEFINED; | |
276 | ||
277 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 278 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
1da177e4 LT |
279 | |
280 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); | |
281 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
282 | } | |
283 | ||
284 | static void power_up(struct isp1301 *isp) | |
285 | { | |
286 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 287 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
25da383d | 288 | |
1da177e4 LT |
289 | /* do this only when cpu is driving transceiver, |
290 | * so host won't see a low speed device... | |
291 | */ | |
292 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
293 | } | |
294 | ||
295 | #define NO_HOST_SUSPEND | |
296 | ||
297 | static int host_suspend(struct isp1301 *isp) | |
298 | { | |
299 | #ifdef NO_HOST_SUSPEND | |
300 | return 0; | |
301 | #else | |
302 | struct device *dev; | |
303 | ||
304 | if (!isp->otg.host) | |
305 | return -ENODEV; | |
306 | ||
307 | /* Currently ASSUMES only the OTG port matters; | |
308 | * other ports could be active... | |
309 | */ | |
310 | dev = isp->otg.host->controller; | |
311 | return dev->driver->suspend(dev, 3, 0); | |
312 | #endif | |
313 | } | |
314 | ||
315 | static int host_resume(struct isp1301 *isp) | |
316 | { | |
317 | #ifdef NO_HOST_SUSPEND | |
318 | return 0; | |
319 | #else | |
320 | struct device *dev; | |
321 | ||
322 | if (!isp->otg.host) | |
323 | return -ENODEV; | |
324 | ||
325 | dev = isp->otg.host->controller; | |
326 | return dev->driver->resume(dev, 0); | |
327 | #endif | |
328 | } | |
329 | ||
330 | static int gadget_suspend(struct isp1301 *isp) | |
331 | { | |
332 | isp->otg.gadget->b_hnp_enable = 0; | |
333 | isp->otg.gadget->a_hnp_support = 0; | |
334 | isp->otg.gadget->a_alt_hnp_support = 0; | |
335 | return usb_gadget_vbus_disconnect(isp->otg.gadget); | |
336 | } | |
337 | ||
338 | /*-------------------------------------------------------------------------*/ | |
339 | ||
340 | #define TIMER_MINUTES 10 | |
341 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) | |
342 | ||
343 | /* Almost all our I2C messaging comes from a work queue's task context. | |
344 | * NOTE: guaranteeing certain response times might mean we shouldn't | |
345 | * share keventd's work queue; a realtime task might be safest. | |
346 | */ | |
347 | void | |
348 | isp1301_defer_work(struct isp1301 *isp, int work) | |
349 | { | |
350 | int status; | |
351 | ||
352 | if (isp && !test_and_set_bit(work, &isp->todo)) { | |
a5f08a32 | 353 | (void) get_device(&isp->client->dev); |
1da177e4 LT |
354 | status = schedule_work(&isp->work); |
355 | if (!status && !isp->working) | |
a5f08a32 | 356 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
357 | "work item %d may be lost\n", work); |
358 | } | |
359 | } | |
360 | ||
361 | /* called from irq handlers */ | |
362 | static void a_idle(struct isp1301 *isp, const char *tag) | |
363 | { | |
f35ae634 TL |
364 | u32 l; |
365 | ||
1da177e4 LT |
366 | if (isp->otg.state == OTG_STATE_A_IDLE) |
367 | return; | |
368 | ||
369 | isp->otg.default_a = 1; | |
370 | if (isp->otg.host) { | |
371 | isp->otg.host->is_b_host = 0; | |
372 | host_suspend(isp); | |
373 | } | |
374 | if (isp->otg.gadget) { | |
375 | isp->otg.gadget->is_a_peripheral = 1; | |
376 | gadget_suspend(isp); | |
377 | } | |
378 | isp->otg.state = OTG_STATE_A_IDLE; | |
f35ae634 TL |
379 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
380 | omap_writel(l, OTG_CTRL); | |
381 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
382 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
383 | } | |
384 | ||
385 | /* called from irq handlers */ | |
386 | static void b_idle(struct isp1301 *isp, const char *tag) | |
387 | { | |
f35ae634 TL |
388 | u32 l; |
389 | ||
1da177e4 LT |
390 | if (isp->otg.state == OTG_STATE_B_IDLE) |
391 | return; | |
392 | ||
393 | isp->otg.default_a = 0; | |
394 | if (isp->otg.host) { | |
395 | isp->otg.host->is_b_host = 1; | |
396 | host_suspend(isp); | |
397 | } | |
398 | if (isp->otg.gadget) { | |
399 | isp->otg.gadget->is_a_peripheral = 0; | |
400 | gadget_suspend(isp); | |
401 | } | |
402 | isp->otg.state = OTG_STATE_B_IDLE; | |
f35ae634 TL |
403 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
404 | omap_writel(l, OTG_CTRL); | |
405 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
406 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
407 | } | |
408 | ||
409 | static void | |
410 | dump_regs(struct isp1301 *isp, const char *label) | |
411 | { | |
412 | #ifdef DEBUG | |
413 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); | |
414 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
415 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
416 | ||
417 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", | |
f35ae634 | 418 | omap_readl(OTG_CTRL), label, state_name(isp), |
1da177e4 LT |
419 | ctrl, status, src); |
420 | /* mode control and irq enables don't change much */ | |
421 | #endif | |
422 | } | |
423 | ||
424 | /*-------------------------------------------------------------------------*/ | |
425 | ||
426 | #ifdef CONFIG_USB_OTG | |
427 | ||
428 | /* | |
429 | * The OMAP OTG controller handles most of the OTG state transitions. | |
430 | * | |
431 | * We translate isp1301 outputs (mostly voltage comparator status) into | |
432 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state | |
433 | * flags into isp1301 inputs ... and infer state transitions. | |
434 | */ | |
435 | ||
436 | #ifdef VERBOSE | |
437 | ||
438 | static void check_state(struct isp1301 *isp, const char *tag) | |
439 | { | |
440 | enum usb_otg_state state = OTG_STATE_UNDEFINED; | |
f35ae634 | 441 | u8 fsm = omap_readw(OTG_TEST) & 0x0ff; |
1da177e4 LT |
442 | unsigned extra = 0; |
443 | ||
444 | switch (fsm) { | |
445 | ||
446 | /* default-b */ | |
447 | case 0x0: | |
448 | state = OTG_STATE_B_IDLE; | |
449 | break; | |
450 | case 0x3: | |
451 | case 0x7: | |
452 | extra = 1; | |
453 | case 0x1: | |
454 | state = OTG_STATE_B_PERIPHERAL; | |
455 | break; | |
456 | case 0x11: | |
457 | state = OTG_STATE_B_SRP_INIT; | |
458 | break; | |
459 | ||
460 | /* extra dual-role default-b states */ | |
461 | case 0x12: | |
462 | case 0x13: | |
463 | case 0x16: | |
464 | extra = 1; | |
465 | case 0x17: | |
466 | state = OTG_STATE_B_WAIT_ACON; | |
467 | break; | |
468 | case 0x34: | |
469 | state = OTG_STATE_B_HOST; | |
470 | break; | |
471 | ||
472 | /* default-a */ | |
473 | case 0x36: | |
474 | state = OTG_STATE_A_IDLE; | |
475 | break; | |
476 | case 0x3c: | |
477 | state = OTG_STATE_A_WAIT_VFALL; | |
478 | break; | |
479 | case 0x7d: | |
480 | state = OTG_STATE_A_VBUS_ERR; | |
481 | break; | |
482 | case 0x9e: | |
483 | case 0x9f: | |
484 | extra = 1; | |
485 | case 0x89: | |
486 | state = OTG_STATE_A_PERIPHERAL; | |
487 | break; | |
488 | case 0xb7: | |
489 | state = OTG_STATE_A_WAIT_VRISE; | |
490 | break; | |
491 | case 0xb8: | |
492 | state = OTG_STATE_A_WAIT_BCON; | |
493 | break; | |
494 | case 0xb9: | |
495 | state = OTG_STATE_A_HOST; | |
496 | break; | |
497 | case 0xba: | |
498 | state = OTG_STATE_A_SUSPEND; | |
499 | break; | |
500 | default: | |
501 | break; | |
502 | } | |
503 | if (isp->otg.state == state && !extra) | |
504 | return; | |
505 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, | |
f35ae634 TL |
506 | state_string(state), fsm, state_name(isp), |
507 | omap_readl(OTG_CTRL)); | |
1da177e4 LT |
508 | } |
509 | ||
510 | #else | |
511 | ||
512 | static inline void check_state(struct isp1301 *isp, const char *tag) { } | |
513 | ||
514 | #endif | |
515 | ||
516 | /* outputs from ISP1301_INTERRUPT_SOURCE */ | |
517 | static void update_otg1(struct isp1301 *isp, u8 int_src) | |
518 | { | |
519 | u32 otg_ctrl; | |
520 | ||
f35ae634 TL |
521 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
522 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
523 | otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); | |
524 | ||
525 | ||
1da177e4 LT |
526 | if (int_src & INTR_SESS_VLD) |
527 | otg_ctrl |= OTG_ASESSVLD; | |
528 | else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) { | |
529 | a_idle(isp, "vfall"); | |
530 | otg_ctrl &= ~OTG_CTRL_BITS; | |
531 | } | |
532 | if (int_src & INTR_VBUS_VLD) | |
533 | otg_ctrl |= OTG_VBUSVLD; | |
534 | if (int_src & INTR_ID_GND) { /* default-A */ | |
535 | if (isp->otg.state == OTG_STATE_B_IDLE | |
536 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
537 | a_idle(isp, "init"); | |
538 | return; | |
539 | } | |
540 | } else { /* default-B */ | |
541 | otg_ctrl |= OTG_ID; | |
542 | if (isp->otg.state == OTG_STATE_A_IDLE | |
543 | || isp->otg.state == OTG_STATE_UNDEFINED) { | |
544 | b_idle(isp, "init"); | |
545 | return; | |
546 | } | |
547 | } | |
f35ae634 | 548 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
549 | } |
550 | ||
551 | /* outputs from ISP1301_OTG_STATUS */ | |
552 | static void update_otg2(struct isp1301 *isp, u8 otg_status) | |
553 | { | |
554 | u32 otg_ctrl; | |
555 | ||
f35ae634 TL |
556 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
557 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
558 | otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND); | |
1da177e4 LT |
559 | if (otg_status & OTG_B_SESS_VLD) |
560 | otg_ctrl |= OTG_BSESSVLD; | |
561 | else if (otg_status & OTG_B_SESS_END) | |
562 | otg_ctrl |= OTG_BSESSEND; | |
f35ae634 | 563 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
564 | } |
565 | ||
566 | /* inputs going to ISP1301 */ | |
567 | static void otg_update_isp(struct isp1301 *isp) | |
568 | { | |
569 | u32 otg_ctrl, otg_change; | |
570 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; | |
571 | ||
f35ae634 | 572 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
573 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; |
574 | isp->last_otg_ctrl = otg_ctrl; | |
575 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; | |
576 | ||
577 | switch (isp->otg.state) { | |
578 | case OTG_STATE_B_IDLE: | |
579 | case OTG_STATE_B_PERIPHERAL: | |
580 | case OTG_STATE_B_SRP_INIT: | |
581 | if (!(otg_ctrl & OTG_PULLUP)) { | |
582 | // if (otg_ctrl & OTG_B_HNPEN) { | |
583 | if (isp->otg.gadget->b_hnp_enable) { | |
584 | isp->otg.state = OTG_STATE_B_WAIT_ACON; | |
585 | pr_debug(" --> b_wait_acon\n"); | |
586 | } | |
587 | goto pulldown; | |
588 | } | |
589 | pullup: | |
590 | set |= OTG1_DP_PULLUP; | |
591 | clr |= OTG1_DP_PULLDOWN; | |
592 | break; | |
593 | case OTG_STATE_A_SUSPEND: | |
594 | case OTG_STATE_A_PERIPHERAL: | |
595 | if (otg_ctrl & OTG_PULLUP) | |
596 | goto pullup; | |
597 | /* FALLTHROUGH */ | |
598 | // case OTG_STATE_B_WAIT_ACON: | |
599 | default: | |
600 | pulldown: | |
601 | set |= OTG1_DP_PULLDOWN; | |
602 | clr |= OTG1_DP_PULLUP; | |
603 | break; | |
604 | } | |
605 | ||
606 | # define toggle(OTG,ISP) do { \ | |
607 | if (otg_ctrl & OTG) set |= ISP; \ | |
608 | else clr |= ISP; \ | |
609 | } while (0) | |
610 | ||
611 | if (!(isp->otg.host)) | |
612 | otg_ctrl &= ~OTG_DRV_VBUS; | |
613 | ||
614 | switch (isp->otg.state) { | |
615 | case OTG_STATE_A_SUSPEND: | |
616 | if (otg_ctrl & OTG_DRV_VBUS) { | |
617 | set |= OTG1_VBUS_DRV; | |
618 | break; | |
619 | } | |
620 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ | |
621 | notresponding(isp); | |
622 | ||
623 | /* FALLTHROUGH */ | |
624 | case OTG_STATE_A_VBUS_ERR: | |
625 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
626 | pr_debug(" --> a_wait_vfall\n"); | |
627 | /* FALLTHROUGH */ | |
628 | case OTG_STATE_A_WAIT_VFALL: | |
629 | /* FIXME usbcore thinks port power is still on ... */ | |
630 | clr |= OTG1_VBUS_DRV; | |
631 | break; | |
632 | case OTG_STATE_A_IDLE: | |
633 | if (otg_ctrl & OTG_DRV_VBUS) { | |
634 | isp->otg.state = OTG_STATE_A_WAIT_VRISE; | |
635 | pr_debug(" --> a_wait_vrise\n"); | |
636 | } | |
637 | /* FALLTHROUGH */ | |
638 | default: | |
639 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); | |
640 | } | |
641 | ||
642 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); | |
643 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); | |
644 | ||
645 | # undef toggle | |
646 | ||
647 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); | |
648 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); | |
649 | ||
650 | /* HNP switch to host or peripheral; and SRP */ | |
651 | if (otg_change & OTG_PULLUP) { | |
f35ae634 TL |
652 | u32 l; |
653 | ||
1da177e4 LT |
654 | switch (isp->otg.state) { |
655 | case OTG_STATE_B_IDLE: | |
656 | if (clr & OTG1_DP_PULLUP) | |
657 | break; | |
658 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
659 | pr_debug(" --> b_peripheral\n"); | |
660 | break; | |
661 | case OTG_STATE_A_SUSPEND: | |
662 | if (clr & OTG1_DP_PULLUP) | |
663 | break; | |
664 | isp->otg.state = OTG_STATE_A_PERIPHERAL; | |
665 | pr_debug(" --> a_peripheral\n"); | |
666 | break; | |
667 | default: | |
668 | break; | |
669 | } | |
f35ae634 TL |
670 | l = omap_readl(OTG_CTRL); |
671 | l |= OTG_PULLUP; | |
672 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
673 | } |
674 | ||
08882d20 | 675 | check_state(isp, __func__); |
1da177e4 LT |
676 | dump_regs(isp, "otg->isp1301"); |
677 | } | |
678 | ||
7d12e780 | 679 | static irqreturn_t omap_otg_irq(int irq, void *_isp) |
1da177e4 | 680 | { |
f35ae634 | 681 | u16 otg_irq = omap_readw(OTG_IRQ_SRC); |
1da177e4 LT |
682 | u32 otg_ctrl; |
683 | int ret = IRQ_NONE; | |
684 | struct isp1301 *isp = _isp; | |
685 | ||
686 | /* update ISP1301 transciever from OTG controller */ | |
687 | if (otg_irq & OPRT_CHG) { | |
f35ae634 | 688 | omap_writew(OPRT_CHG, OTG_IRQ_SRC); |
1da177e4 LT |
689 | isp1301_defer_work(isp, WORK_UPDATE_ISP); |
690 | ret = IRQ_HANDLED; | |
691 | ||
692 | /* SRP to become b_peripheral failed */ | |
693 | } else if (otg_irq & B_SRP_TMROUT) { | |
f35ae634 | 694 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL)); |
1da177e4 LT |
695 | notresponding(isp); |
696 | ||
697 | /* gadget drivers that care should monitor all kinds of | |
698 | * remote wakeup (SRP, normal) using their own timer | |
699 | * to give "check cable and A-device" messages. | |
700 | */ | |
701 | if (isp->otg.state == OTG_STATE_B_SRP_INIT) | |
702 | b_idle(isp, "srp_timeout"); | |
703 | ||
f35ae634 | 704 | omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
705 | ret = IRQ_HANDLED; |
706 | ||
707 | /* HNP to become b_host failed */ | |
708 | } else if (otg_irq & B_HNP_FAIL) { | |
709 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", | |
f35ae634 | 710 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
711 | notresponding(isp); |
712 | ||
f35ae634 | 713 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
714 | otg_ctrl |= OTG_BUSDROP; |
715 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 716 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
717 | |
718 | /* subset of b_peripheral()... */ | |
719 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
720 | pr_debug(" --> b_peripheral\n"); | |
721 | ||
f35ae634 | 722 | omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); |
1da177e4 LT |
723 | ret = IRQ_HANDLED; |
724 | ||
725 | /* detect SRP from B-device ... */ | |
726 | } else if (otg_irq & A_SRP_DETECT) { | |
727 | pr_debug("otg: %s SRP_DETECT, %06x\n", | |
f35ae634 | 728 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
729 | |
730 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
731 | switch (isp->otg.state) { | |
732 | case OTG_STATE_A_IDLE: | |
733 | if (!isp->otg.host) | |
734 | break; | |
735 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
f35ae634 | 736 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
737 | otg_ctrl |= OTG_A_BUSREQ; |
738 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
739 | & ~OTG_XCEIV_INPUTS | |
740 | & OTG_CTRL_MASK; | |
f35ae634 | 741 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
742 | break; |
743 | default: | |
744 | break; | |
745 | } | |
746 | ||
f35ae634 | 747 | omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); |
1da177e4 LT |
748 | ret = IRQ_HANDLED; |
749 | ||
750 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) | |
751 | * we don't track them separately | |
752 | */ | |
753 | } else if (otg_irq & A_REQ_TMROUT) { | |
f35ae634 | 754 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
755 | pr_info("otg: BCON_TMOUT from %s, %06x\n", |
756 | state_name(isp), otg_ctrl); | |
757 | notresponding(isp); | |
758 | ||
759 | otg_ctrl |= OTG_BUSDROP; | |
760 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 761 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
762 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; |
763 | ||
f35ae634 | 764 | omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
765 | ret = IRQ_HANDLED; |
766 | ||
767 | /* A-supplied voltage fell too low; overcurrent */ | |
768 | } else if (otg_irq & A_VBUS_ERR) { | |
f35ae634 | 769 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
770 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", |
771 | state_name(isp), otg_irq, otg_ctrl); | |
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_VBUS_ERR; |
777 | ||
f35ae634 | 778 | omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); |
1da177e4 LT |
779 | ret = IRQ_HANDLED; |
780 | ||
781 | /* switch driver; the transciever code activates it, | |
782 | * ungating the udc clock or resuming OHCI. | |
783 | */ | |
784 | } else if (otg_irq & DRIVER_SWITCH) { | |
785 | int kick = 0; | |
786 | ||
f35ae634 | 787 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
788 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", |
789 | state_name(isp), | |
790 | (otg_ctrl & OTG_DRIVER_SEL) | |
791 | ? "gadget" : "host", | |
792 | otg_ctrl); | |
793 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
794 | ||
795 | /* role is peripheral */ | |
796 | if (otg_ctrl & OTG_DRIVER_SEL) { | |
797 | switch (isp->otg.state) { | |
798 | case OTG_STATE_A_IDLE: | |
08882d20 | 799 | b_idle(isp, __func__); |
1da177e4 LT |
800 | break; |
801 | default: | |
802 | break; | |
803 | } | |
804 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
805 | ||
806 | /* role is host */ | |
807 | } else { | |
808 | if (!(otg_ctrl & OTG_ID)) { | |
25da383d | 809 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
f35ae634 | 810 | omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL); |
1da177e4 LT |
811 | } |
812 | ||
813 | if (isp->otg.host) { | |
814 | switch (isp->otg.state) { | |
815 | case OTG_STATE_B_WAIT_ACON: | |
816 | isp->otg.state = OTG_STATE_B_HOST; | |
817 | pr_debug(" --> b_host\n"); | |
818 | kick = 1; | |
819 | break; | |
820 | case OTG_STATE_A_WAIT_BCON: | |
821 | isp->otg.state = OTG_STATE_A_HOST; | |
822 | pr_debug(" --> a_host\n"); | |
823 | break; | |
824 | case OTG_STATE_A_PERIPHERAL: | |
825 | isp->otg.state = OTG_STATE_A_WAIT_BCON; | |
826 | pr_debug(" --> a_wait_bcon\n"); | |
827 | break; | |
828 | default: | |
829 | break; | |
830 | } | |
831 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
832 | } | |
833 | } | |
834 | ||
f35ae634 | 835 | omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); |
1da177e4 LT |
836 | ret = IRQ_HANDLED; |
837 | ||
838 | if (kick) | |
839 | usb_bus_start_enum(isp->otg.host, | |
840 | isp->otg.host->otg_port); | |
841 | } | |
842 | ||
08882d20 | 843 | check_state(isp, __func__); |
1da177e4 LT |
844 | return ret; |
845 | } | |
846 | ||
847 | static struct platform_device *otg_dev; | |
848 | ||
849 | static int otg_init(struct isp1301 *isp) | |
850 | { | |
f35ae634 TL |
851 | u32 l; |
852 | ||
1da177e4 LT |
853 | if (!otg_dev) |
854 | return -ENODEV; | |
855 | ||
08882d20 | 856 | dump_regs(isp, __func__); |
1da177e4 | 857 | /* some of these values are board-specific... */ |
f35ae634 TL |
858 | l = omap_readl(OTG_SYSCON_2); |
859 | l |= OTG_EN | |
1da177e4 LT |
860 | /* for B-device: */ |
861 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ | |
862 | | SRP_GPDVBUS /* discharge after VBUS pulse */ | |
863 | // | (3 << 24) /* 2msec VBUS pulse */ | |
864 | /* for A-device: */ | |
865 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ | |
866 | | SRP_DPW /* detect 167+ns SRP pulses */ | |
867 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ | |
868 | ; | |
f35ae634 | 869 | omap_writel(l, OTG_SYSCON_2); |
1da177e4 LT |
870 | |
871 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
872 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
873 | ||
08882d20 | 874 | check_state(isp, __func__); |
1da177e4 | 875 | pr_debug("otg: %s, %s %06x\n", |
f35ae634 | 876 | state_name(isp), __func__, omap_readl(OTG_CTRL)); |
1da177e4 | 877 | |
f35ae634 | 878 | omap_writew(DRIVER_SWITCH | OPRT_CHG |
1da177e4 | 879 | | B_SRP_TMROUT | B_HNP_FAIL |
f35ae634 TL |
880 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN); |
881 | ||
882 | l = omap_readl(OTG_SYSCON_2); | |
883 | l |= OTG_EN; | |
884 | omap_writel(l, OTG_SYSCON_2); | |
1da177e4 LT |
885 | |
886 | return 0; | |
887 | } | |
888 | ||
3ae5eaec | 889 | static int otg_probe(struct platform_device *dev) |
1da177e4 LT |
890 | { |
891 | // struct omap_usb_config *config = dev->platform_data; | |
892 | ||
3ae5eaec | 893 | otg_dev = dev; |
1da177e4 LT |
894 | return 0; |
895 | } | |
896 | ||
3ae5eaec | 897 | static int otg_remove(struct platform_device *dev) |
1da177e4 LT |
898 | { |
899 | otg_dev = 0; | |
900 | return 0; | |
901 | } | |
902 | ||
3ae5eaec | 903 | struct platform_driver omap_otg_driver = { |
1da177e4 | 904 | .probe = otg_probe, |
3ae5eaec RK |
905 | .remove = otg_remove, |
906 | .driver = { | |
907 | .owner = THIS_MODULE, | |
908 | .name = "omap_otg", | |
909 | }, | |
1da177e4 LT |
910 | }; |
911 | ||
912 | static int otg_bind(struct isp1301 *isp) | |
913 | { | |
914 | int status; | |
915 | ||
916 | if (otg_dev) | |
917 | return -EBUSY; | |
918 | ||
3ae5eaec | 919 | status = platform_driver_register(&omap_otg_driver); |
1da177e4 LT |
920 | if (status < 0) |
921 | return status; | |
922 | ||
923 | if (otg_dev) | |
924 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, | |
dace1453 | 925 | IRQF_DISABLED, DRIVER_NAME, isp); |
1da177e4 LT |
926 | else |
927 | status = -ENODEV; | |
928 | ||
929 | if (status < 0) | |
3ae5eaec | 930 | platform_driver_unregister(&omap_otg_driver); |
1da177e4 LT |
931 | return status; |
932 | } | |
933 | ||
934 | static void otg_unbind(struct isp1301 *isp) | |
935 | { | |
936 | if (!otg_dev) | |
937 | return; | |
938 | free_irq(otg_dev->resource[1].start, isp); | |
939 | } | |
940 | ||
941 | #else | |
942 | ||
943 | /* OTG controller isn't clocked */ | |
944 | ||
945 | #endif /* CONFIG_USB_OTG */ | |
946 | ||
947 | /*-------------------------------------------------------------------------*/ | |
948 | ||
949 | static void b_peripheral(struct isp1301 *isp) | |
950 | { | |
f35ae634 TL |
951 | u32 l; |
952 | ||
953 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; | |
954 | omap_writel(l, OTG_CTRL); | |
955 | ||
1da177e4 LT |
956 | usb_gadget_vbus_connect(isp->otg.gadget); |
957 | ||
958 | #ifdef CONFIG_USB_OTG | |
959 | enable_vbus_draw(isp, 8); | |
960 | otg_update_isp(isp); | |
961 | #else | |
962 | enable_vbus_draw(isp, 100); | |
963 | /* UDC driver just set OTG_BSESSVLD */ | |
964 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); | |
965 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); | |
966 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
967 | pr_debug(" --> b_peripheral\n"); | |
968 | dump_regs(isp, "2periph"); | |
969 | #endif | |
970 | } | |
971 | ||
972 | static void isp_update_otg(struct isp1301 *isp, u8 stat) | |
973 | { | |
974 | u8 isp_stat, isp_bstat; | |
975 | enum usb_otg_state state = isp->otg.state; | |
976 | ||
977 | if (stat & INTR_BDIS_ACON) | |
978 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); | |
979 | ||
980 | /* start certain state transitions right away */ | |
981 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
982 | if (isp_stat & INTR_ID_GND) { | |
983 | if (isp->otg.default_a) { | |
984 | switch (state) { | |
985 | case OTG_STATE_B_IDLE: | |
986 | a_idle(isp, "idle"); | |
987 | /* FALLTHROUGH */ | |
988 | case OTG_STATE_A_IDLE: | |
989 | enable_vbus_source(isp); | |
990 | /* FALLTHROUGH */ | |
991 | case OTG_STATE_A_WAIT_VRISE: | |
992 | /* we skip over OTG_STATE_A_WAIT_BCON, since | |
993 | * the HC will transition to A_HOST (or | |
994 | * A_SUSPEND!) without our noticing except | |
995 | * when HNP is used. | |
996 | */ | |
997 | if (isp_stat & INTR_VBUS_VLD) | |
998 | isp->otg.state = OTG_STATE_A_HOST; | |
999 | break; | |
1000 | case OTG_STATE_A_WAIT_VFALL: | |
1001 | if (!(isp_stat & INTR_SESS_VLD)) | |
1002 | a_idle(isp, "vfell"); | |
1003 | break; | |
1004 | default: | |
1005 | if (!(isp_stat & INTR_VBUS_VLD)) | |
1006 | isp->otg.state = OTG_STATE_A_VBUS_ERR; | |
1007 | break; | |
1008 | } | |
1009 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1010 | } else { | |
1011 | switch (state) { | |
1012 | case OTG_STATE_B_PERIPHERAL: | |
1013 | case OTG_STATE_B_HOST: | |
1014 | case OTG_STATE_B_WAIT_ACON: | |
1015 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
1016 | break; | |
1017 | default: | |
1018 | break; | |
1019 | } | |
1020 | if (state != OTG_STATE_A_IDLE) | |
1021 | a_idle(isp, "id"); | |
1022 | if (isp->otg.host && state == OTG_STATE_A_IDLE) | |
1023 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
1024 | isp_bstat = 0; | |
1025 | } | |
1026 | } else { | |
f35ae634 TL |
1027 | u32 l; |
1028 | ||
1da177e4 LT |
1029 | /* if user unplugged mini-A end of cable, |
1030 | * don't bypass A_WAIT_VFALL. | |
1031 | */ | |
1032 | if (isp->otg.default_a) { | |
1033 | switch (state) { | |
1034 | default: | |
1035 | isp->otg.state = OTG_STATE_A_WAIT_VFALL; | |
1036 | break; | |
1037 | case OTG_STATE_A_WAIT_VFALL: | |
1038 | state = OTG_STATE_A_IDLE; | |
1039 | /* khubd may take a while to notice and | |
1040 | * handle this disconnect, so don't go | |
1041 | * to B_IDLE quite yet. | |
1042 | */ | |
1043 | break; | |
1044 | case OTG_STATE_A_IDLE: | |
1045 | host_suspend(isp); | |
1046 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, | |
1047 | MC1_BDIS_ACON_EN); | |
1048 | isp->otg.state = OTG_STATE_B_IDLE; | |
f35ae634 TL |
1049 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1050 | l &= ~OTG_CTRL_BITS; | |
1051 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1052 | break; |
1053 | case OTG_STATE_B_IDLE: | |
1054 | break; | |
1055 | } | |
1056 | } | |
1057 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1058 | ||
1059 | switch (isp->otg.state) { | |
1060 | case OTG_STATE_B_PERIPHERAL: | |
1061 | case OTG_STATE_B_WAIT_ACON: | |
1062 | case OTG_STATE_B_HOST: | |
1063 | if (likely(isp_bstat & OTG_B_SESS_VLD)) | |
1064 | break; | |
1065 | enable_vbus_draw(isp, 0); | |
1066 | #ifndef CONFIG_USB_OTG | |
1067 | /* UDC driver will clear OTG_BSESSVLD */ | |
1068 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1069 | OTG1_DP_PULLDOWN); | |
1070 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1071 | OTG1_DP_PULLUP); | |
08882d20 | 1072 | dump_regs(isp, __func__); |
1da177e4 LT |
1073 | #endif |
1074 | /* FALLTHROUGH */ | |
1075 | case OTG_STATE_B_SRP_INIT: | |
08882d20 | 1076 | b_idle(isp, __func__); |
f35ae634 TL |
1077 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
1078 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1079 | /* FALLTHROUGH */ |
1080 | case OTG_STATE_B_IDLE: | |
1081 | if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) { | |
1082 | #ifdef CONFIG_USB_OTG | |
1083 | update_otg1(isp, isp_stat); | |
1084 | update_otg2(isp, isp_bstat); | |
1085 | #endif | |
1086 | b_peripheral(isp); | |
1087 | } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) | |
1088 | isp_bstat |= OTG_B_SESS_END; | |
1089 | break; | |
1090 | case OTG_STATE_A_WAIT_VFALL: | |
1091 | break; | |
1092 | default: | |
1093 | pr_debug("otg: unsupported b-device %s\n", | |
1094 | state_name(isp)); | |
1095 | break; | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | if (state != isp->otg.state) | |
1100 | pr_debug(" isp, %s -> %s\n", | |
1101 | state_string(state), state_name(isp)); | |
1102 | ||
1103 | #ifdef CONFIG_USB_OTG | |
1104 | /* update the OTG controller state to match the isp1301; may | |
1105 | * trigger OPRT_CHG irqs for changes going to the isp1301. | |
1106 | */ | |
1107 | update_otg1(isp, isp_stat); | |
1108 | update_otg2(isp, isp_bstat); | |
08882d20 | 1109 | check_state(isp, __func__); |
1da177e4 LT |
1110 | #endif |
1111 | ||
1112 | dump_regs(isp, "isp1301->otg"); | |
1113 | } | |
1114 | ||
1115 | /*-------------------------------------------------------------------------*/ | |
1116 | ||
1117 | static u8 isp1301_clear_latch(struct isp1301 *isp) | |
1118 | { | |
1119 | u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); | |
1120 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); | |
1121 | return latch; | |
1122 | } | |
1123 | ||
1124 | static void | |
25da383d | 1125 | isp1301_work(struct work_struct *work) |
1da177e4 | 1126 | { |
25da383d | 1127 | struct isp1301 *isp = container_of(work, struct isp1301, work); |
1da177e4 LT |
1128 | int stop; |
1129 | ||
1130 | /* implicit lock: we're the only task using this device */ | |
1131 | isp->working = 1; | |
1132 | do { | |
1133 | stop = test_bit(WORK_STOP, &isp->todo); | |
1134 | ||
1135 | #ifdef CONFIG_USB_OTG | |
1136 | /* transfer state from otg engine to isp1301 */ | |
1137 | if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { | |
1138 | otg_update_isp(isp); | |
a5f08a32 | 1139 | put_device(&isp->client->dev); |
1da177e4 LT |
1140 | } |
1141 | #endif | |
1142 | /* transfer state from isp1301 to otg engine */ | |
1143 | if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { | |
1144 | u8 stat = isp1301_clear_latch(isp); | |
1145 | ||
1146 | isp_update_otg(isp, stat); | |
a5f08a32 | 1147 | put_device(&isp->client->dev); |
1da177e4 LT |
1148 | } |
1149 | ||
1150 | if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { | |
1151 | u32 otg_ctrl; | |
1152 | ||
1153 | /* | |
1154 | * skip A_WAIT_VRISE; hc transitions invisibly | |
1155 | * skip A_WAIT_BCON; same. | |
1156 | */ | |
1157 | switch (isp->otg.state) { | |
1158 | case OTG_STATE_A_WAIT_BCON: | |
1159 | case OTG_STATE_A_WAIT_VRISE: | |
1160 | isp->otg.state = OTG_STATE_A_HOST; | |
1161 | pr_debug(" --> a_host\n"); | |
f35ae634 | 1162 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1163 | otg_ctrl |= OTG_A_BUSREQ; |
1164 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
1165 | & OTG_CTRL_MASK; | |
f35ae634 | 1166 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
1167 | break; |
1168 | case OTG_STATE_B_WAIT_ACON: | |
1169 | isp->otg.state = OTG_STATE_B_HOST; | |
1170 | pr_debug(" --> b_host (acon)\n"); | |
1171 | break; | |
1172 | case OTG_STATE_B_HOST: | |
1173 | case OTG_STATE_B_IDLE: | |
1174 | case OTG_STATE_A_IDLE: | |
1175 | break; | |
1176 | default: | |
1177 | pr_debug(" host resume in %s\n", | |
1178 | state_name(isp)); | |
1179 | } | |
1180 | host_resume(isp); | |
1181 | // mdelay(10); | |
a5f08a32 | 1182 | put_device(&isp->client->dev); |
1da177e4 LT |
1183 | } |
1184 | ||
1185 | if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { | |
1186 | #ifdef VERBOSE | |
1187 | dump_regs(isp, "timer"); | |
1188 | if (!stop) | |
1189 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1190 | #endif | |
a5f08a32 | 1191 | put_device(&isp->client->dev); |
1da177e4 LT |
1192 | } |
1193 | ||
1194 | if (isp->todo) | |
a5f08a32 | 1195 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
1196 | "work done, todo = 0x%lx\n", |
1197 | isp->todo); | |
1198 | if (stop) { | |
a5f08a32 | 1199 | dev_dbg(&isp->client->dev, "stop\n"); |
1da177e4 LT |
1200 | break; |
1201 | } | |
1202 | } while (isp->todo); | |
1203 | isp->working = 0; | |
1204 | } | |
1205 | ||
7d12e780 | 1206 | static irqreturn_t isp1301_irq(int irq, void *isp) |
1da177e4 LT |
1207 | { |
1208 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
1209 | return IRQ_HANDLED; | |
1210 | } | |
1211 | ||
1212 | static void isp1301_timer(unsigned long _isp) | |
1213 | { | |
1214 | isp1301_defer_work((void *)_isp, WORK_TIMER); | |
1215 | } | |
1216 | ||
1217 | /*-------------------------------------------------------------------------*/ | |
1218 | ||
1219 | static void isp1301_release(struct device *dev) | |
1220 | { | |
1221 | struct isp1301 *isp; | |
1222 | ||
a5f08a32 | 1223 | isp = dev_get_drvdata(dev); |
1da177e4 LT |
1224 | |
1225 | /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ | |
1226 | if (isp->i2c_release) | |
1227 | isp->i2c_release(dev); | |
1228 | kfree (isp); | |
1229 | } | |
1230 | ||
1231 | static struct isp1301 *the_transceiver; | |
1232 | ||
1233 | static int isp1301_detach_client(struct i2c_client *i2c) | |
1234 | { | |
1235 | struct isp1301 *isp; | |
1236 | ||
a5f08a32 | 1237 | isp = i2c_get_clientdata(i2c); |
1da177e4 LT |
1238 | |
1239 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1240 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1241 | free_irq(isp->irq, isp); | |
1242 | #ifdef CONFIG_USB_OTG | |
1243 | otg_unbind(isp); | |
1244 | #endif | |
1245 | if (machine_is_omap_h2()) | |
1246 | omap_free_gpio(2); | |
1247 | ||
1248 | isp->timer.data = 0; | |
1249 | set_bit(WORK_STOP, &isp->todo); | |
1250 | del_timer_sync(&isp->timer); | |
1251 | flush_scheduled_work(); | |
1252 | ||
1253 | put_device(&i2c->dev); | |
1254 | the_transceiver = 0; | |
1255 | ||
1256 | return i2c_detach_client(i2c); | |
1257 | } | |
1258 | ||
1259 | /*-------------------------------------------------------------------------*/ | |
1260 | ||
1261 | /* NOTE: three modes are possible here, only one of which | |
1262 | * will be standards-conformant on any given system: | |
1263 | * | |
1264 | * - OTG mode (dual-role), required if there's a Mini-AB connector | |
1265 | * - HOST mode, for when there's one or more A (host) connectors | |
1266 | * - DEVICE mode, for when there's a B/Mini-B (device) connector | |
1267 | * | |
1268 | * As a rule, you won't have an isp1301 chip unless it's there to | |
25da383d | 1269 | * support the OTG mode. Other modes help testing USB controllers |
1da177e4 LT |
1270 | * in isolation from (full) OTG support, or maybe so later board |
1271 | * revisions can help to support those feature. | |
1272 | */ | |
1273 | ||
1274 | #ifdef CONFIG_USB_OTG | |
1275 | ||
1276 | static int isp1301_otg_enable(struct isp1301 *isp) | |
1277 | { | |
1278 | power_up(isp); | |
1279 | otg_init(isp); | |
1280 | ||
1281 | /* NOTE: since we don't change this, this provides | |
1282 | * a few more interrupts than are strictly needed. | |
1283 | */ | |
1284 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1285 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1286 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1287 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1288 | |
a5f08a32 | 1289 | dev_info(&isp->client->dev, "ready for dual-role USB ...\n"); |
1da177e4 LT |
1290 | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | #endif | |
1295 | ||
1296 | /* add or disable the host device+driver */ | |
1297 | static int | |
1298 | isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host) | |
1299 | { | |
1300 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
1301 | ||
1302 | if (!otg || isp != the_transceiver) | |
1303 | return -ENODEV; | |
1304 | ||
1305 | if (!host) { | |
f35ae634 | 1306 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 LT |
1307 | power_down(isp); |
1308 | isp->otg.host = 0; | |
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | #ifdef CONFIG_USB_OTG | |
1313 | isp->otg.host = host; | |
a5f08a32 | 1314 | dev_dbg(&isp->client->dev, "registered host\n"); |
1da177e4 LT |
1315 | host_suspend(isp); |
1316 | if (isp->otg.gadget) | |
1317 | return isp1301_otg_enable(isp); | |
1318 | return 0; | |
1319 | ||
1320 | #elif !defined(CONFIG_USB_GADGET_OMAP) | |
1321 | // FIXME update its refcount | |
1322 | isp->otg.host = host; | |
1323 | ||
1324 | power_up(isp); | |
1325 | ||
1326 | if (machine_is_omap_h2()) | |
1327 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1328 | ||
a5f08a32 | 1329 | dev_info(&isp->client->dev, "A-Host sessions ok\n"); |
1da177e4 | 1330 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, |
25da383d | 1331 | INTR_ID_GND); |
1da177e4 | 1332 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1333 | INTR_ID_GND); |
1da177e4 LT |
1334 | |
1335 | /* If this has a Mini-AB connector, this mode is highly | |
1336 | * nonstandard ... but can be handy for testing, especially with | |
1337 | * the Mini-A end of an OTG cable. (Or something nonstandard | |
1338 | * like MiniB-to-StandardB, maybe built with a gender mender.) | |
1339 | */ | |
1340 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); | |
1341 | ||
08882d20 | 1342 | dump_regs(isp, __func__); |
1da177e4 LT |
1343 | |
1344 | return 0; | |
1345 | ||
1346 | #else | |
a5f08a32 | 1347 | dev_dbg(&isp->client->dev, "host sessions not allowed\n"); |
1da177e4 LT |
1348 | return -EINVAL; |
1349 | #endif | |
1350 | ||
1351 | } | |
1352 | ||
1353 | static int | |
1354 | isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) | |
1355 | { | |
1356 | struct isp1301 *isp = container_of(otg, struct isp1301, otg); | |
f35ae634 | 1357 | u32 l; |
1da177e4 LT |
1358 | |
1359 | if (!otg || isp != the_transceiver) | |
1360 | return -ENODEV; | |
1361 | ||
1362 | if (!gadget) { | |
f35ae634 | 1363 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 LT |
1364 | if (!isp->otg.default_a) |
1365 | enable_vbus_draw(isp, 0); | |
1366 | usb_gadget_vbus_disconnect(isp->otg.gadget); | |
1367 | isp->otg.gadget = 0; | |
1368 | power_down(isp); | |
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | #ifdef CONFIG_USB_OTG | |
1373 | isp->otg.gadget = gadget; | |
a5f08a32 | 1374 | dev_dbg(&isp->client->dev, "registered gadget\n"); |
1da177e4 LT |
1375 | /* gadget driver may be suspended until vbus_connect () */ |
1376 | if (isp->otg.host) | |
1377 | return isp1301_otg_enable(isp); | |
1378 | return 0; | |
1379 | ||
1380 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) | |
1381 | isp->otg.gadget = gadget; | |
1382 | // FIXME update its refcount | |
1383 | ||
f35ae634 TL |
1384 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1385 | l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS); | |
1386 | l |= OTG_ID; | |
1387 | omap_writel(l, OTG_CTRL); | |
1388 | ||
1da177e4 LT |
1389 | power_up(isp); |
1390 | isp->otg.state = OTG_STATE_B_IDLE; | |
1391 | ||
1392 | if (machine_is_omap_h2()) | |
1393 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1394 | ||
1395 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1396 | INTR_SESS_VLD); |
1da177e4 | 1397 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1398 | INTR_VBUS_VLD); |
a5f08a32 | 1399 | dev_info(&isp->client->dev, "B-Peripheral sessions ok\n"); |
08882d20 | 1400 | dump_regs(isp, __func__); |
1da177e4 LT |
1401 | |
1402 | /* If this has a Mini-AB connector, this mode is highly | |
1403 | * nonstandard ... but can be handy for testing, so long | |
1404 | * as you don't plug a Mini-A cable into the jack. | |
1405 | */ | |
1406 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) | |
1407 | b_peripheral(isp); | |
1408 | ||
1409 | return 0; | |
1410 | ||
1411 | #else | |
a5f08a32 | 1412 | dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n"); |
1da177e4 LT |
1413 | return -EINVAL; |
1414 | #endif | |
1415 | } | |
1416 | ||
1417 | ||
1418 | /*-------------------------------------------------------------------------*/ | |
1419 | ||
1420 | static int | |
1421 | isp1301_set_power(struct otg_transceiver *dev, unsigned mA) | |
1422 | { | |
1423 | if (!the_transceiver) | |
1424 | return -ENODEV; | |
1425 | if (dev->state == OTG_STATE_B_PERIPHERAL) | |
1426 | enable_vbus_draw(the_transceiver, mA); | |
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | static int | |
1431 | isp1301_start_srp(struct otg_transceiver *dev) | |
1432 | { | |
1433 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
1434 | u32 otg_ctrl; | |
1435 | ||
1436 | if (!dev || isp != the_transceiver | |
1437 | || isp->otg.state != OTG_STATE_B_IDLE) | |
1438 | return -ENODEV; | |
1439 | ||
f35ae634 | 1440 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1441 | if (!(otg_ctrl & OTG_BSESSEND)) |
1442 | return -EINVAL; | |
1443 | ||
1444 | otg_ctrl |= OTG_B_BUSREQ; | |
1445 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; | |
f35ae634 | 1446 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
1447 | isp->otg.state = OTG_STATE_B_SRP_INIT; |
1448 | ||
f35ae634 TL |
1449 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), |
1450 | omap_readl(OTG_CTRL)); | |
1da177e4 | 1451 | #ifdef CONFIG_USB_OTG |
08882d20 | 1452 | check_state(isp, __func__); |
1da177e4 LT |
1453 | #endif |
1454 | return 0; | |
1455 | } | |
1456 | ||
1457 | static int | |
1458 | isp1301_start_hnp(struct otg_transceiver *dev) | |
1459 | { | |
1460 | #ifdef CONFIG_USB_OTG | |
1461 | struct isp1301 *isp = container_of(dev, struct isp1301, otg); | |
f35ae634 | 1462 | u32 l; |
1da177e4 LT |
1463 | |
1464 | if (!dev || isp != the_transceiver) | |
1465 | return -ENODEV; | |
1466 | if (isp->otg.default_a && (isp->otg.host == NULL | |
1467 | || !isp->otg.host->b_hnp_enable)) | |
1468 | return -ENOTCONN; | |
1469 | if (!isp->otg.default_a && (isp->otg.gadget == NULL | |
1470 | || !isp->otg.gadget->b_hnp_enable)) | |
1471 | return -ENOTCONN; | |
1472 | ||
1473 | /* We want hardware to manage most HNP protocol timings. | |
1474 | * So do this part as early as possible... | |
1475 | */ | |
1476 | switch (isp->otg.state) { | |
1477 | case OTG_STATE_B_HOST: | |
1478 | isp->otg.state = OTG_STATE_B_PERIPHERAL; | |
1479 | /* caller will suspend next */ | |
1480 | break; | |
1481 | case OTG_STATE_A_HOST: | |
1482 | #if 0 | |
1483 | /* autoconnect mode avoids irq latency bugs */ | |
1484 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1485 | MC1_BDIS_ACON_EN); | |
1486 | #endif | |
1487 | /* caller must suspend then clear A_BUSREQ */ | |
1488 | usb_gadget_vbus_connect(isp->otg.gadget); | |
f35ae634 TL |
1489 | l = omap_readl(OTG_CTRL); |
1490 | l |= OTG_A_SETB_HNPEN; | |
1491 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1492 | |
1493 | break; | |
1494 | case OTG_STATE_A_PERIPHERAL: | |
1495 | /* initiated by B-Host suspend */ | |
1496 | break; | |
1497 | default: | |
1498 | return -EILSEQ; | |
1499 | } | |
1500 | pr_debug("otg: HNP %s, %06x ...\n", | |
f35ae634 | 1501 | state_name(isp), omap_readl(OTG_CTRL)); |
08882d20 | 1502 | check_state(isp, __func__); |
1da177e4 LT |
1503 | return 0; |
1504 | #else | |
1505 | /* srp-only */ | |
1506 | return -EINVAL; | |
1507 | #endif | |
1508 | } | |
1509 | ||
1510 | /*-------------------------------------------------------------------------*/ | |
1511 | ||
1512 | /* no error returns, they'd just make bus scanning stop */ | |
1513 | static int isp1301_probe(struct i2c_adapter *bus, int address, int kind) | |
1514 | { | |
1515 | int status; | |
1516 | struct isp1301 *isp; | |
1517 | struct i2c_client *i2c; | |
1518 | ||
1519 | if (the_transceiver) | |
1520 | return 0; | |
1521 | ||
82ca76b6 | 1522 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
1da177e4 LT |
1523 | if (!isp) |
1524 | return 0; | |
1525 | ||
25da383d | 1526 | INIT_WORK(&isp->work, isp1301_work); |
1da177e4 LT |
1527 | init_timer(&isp->timer); |
1528 | isp->timer.function = isp1301_timer; | |
1529 | isp->timer.data = (unsigned long) isp; | |
1530 | ||
1531 | isp->irq = -1; | |
a5f08a32 FB |
1532 | isp->c.addr = address; |
1533 | i2c_set_clientdata(&isp->c, isp); | |
1534 | isp->c.adapter = bus; | |
1535 | isp->c.driver = &isp1301_driver; | |
1536 | strlcpy(isp->c.name, DRIVER_NAME, I2C_NAME_SIZE); | |
1537 | isp->client = i2c = &isp->c; | |
1da177e4 LT |
1538 | |
1539 | /* if this is a true probe, verify the chip ... */ | |
1540 | if (kind < 0) { | |
1541 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); | |
1542 | if (status != I2C_VENDOR_ID_PHILIPS) { | |
1543 | dev_dbg(&bus->dev, "addr %d not philips id: %d\n", | |
1544 | address, status); | |
1545 | goto fail1; | |
1546 | } | |
1547 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); | |
1548 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { | |
1549 | dev_dbg(&bus->dev, "%d not isp1301, %d\n", | |
1550 | address, status); | |
1551 | goto fail1; | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | status = i2c_attach_client(i2c); | |
1556 | if (status < 0) { | |
1557 | dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n", | |
1558 | DRIVER_NAME, address, status); | |
1559 | fail1: | |
1560 | kfree(isp); | |
1561 | return 0; | |
1562 | } | |
1563 | isp->i2c_release = i2c->dev.release; | |
1564 | i2c->dev.release = isp1301_release; | |
1565 | ||
1566 | /* initial development used chiprev 2.00 */ | |
1567 | status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); | |
1568 | dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", | |
1569 | status >> 8, status & 0xff); | |
1570 | ||
1571 | /* make like power-on reset */ | |
1572 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); | |
1573 | ||
1574 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); | |
1575 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); | |
1576 | ||
1577 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1578 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); | |
1579 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1580 | ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
1581 | ||
1582 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); | |
1583 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1584 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1585 | ||
1586 | #ifdef CONFIG_USB_OTG | |
1587 | status = otg_bind(isp); | |
1588 | if (status < 0) { | |
1589 | dev_dbg(&i2c->dev, "can't bind OTG\n"); | |
1590 | goto fail2; | |
1591 | } | |
1592 | #endif | |
1593 | ||
1594 | if (machine_is_omap_h2()) { | |
1595 | /* full speed signaling by default */ | |
1596 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
cbbcb9b0 | 1597 | MC1_SPEED); |
1da177e4 LT |
1598 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, |
1599 | MC2_SPD_SUSP_CTRL); | |
1600 | ||
1601 | /* IRQ wired at M14 */ | |
1602 | omap_cfg_reg(M14_1510_GPIO2); | |
1603 | isp->irq = OMAP_GPIO_IRQ(2); | |
25da383d DB |
1604 | if (gpio_request(2, "isp1301") == 0) |
1605 | gpio_direction_input(2); | |
1606 | isp->irq_type = IRQF_TRIGGER_FALLING; | |
1da177e4 LT |
1607 | } |
1608 | ||
25da383d | 1609 | isp->irq_type |= IRQF_SAMPLE_RANDOM; |
1da177e4 | 1610 | status = request_irq(isp->irq, isp1301_irq, |
25da383d | 1611 | isp->irq_type, DRIVER_NAME, isp); |
1da177e4 LT |
1612 | if (status < 0) { |
1613 | dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", | |
1614 | isp->irq, status); | |
1615 | #ifdef CONFIG_USB_OTG | |
1616 | fail2: | |
1617 | #endif | |
1618 | i2c_detach_client(i2c); | |
1619 | goto fail1; | |
1620 | } | |
1621 | ||
a5f08a32 | 1622 | isp->otg.dev = &isp->client->dev; |
1da177e4 LT |
1623 | isp->otg.label = DRIVER_NAME; |
1624 | ||
1625 | isp->otg.set_host = isp1301_set_host, | |
1626 | isp->otg.set_peripheral = isp1301_set_peripheral, | |
1627 | isp->otg.set_power = isp1301_set_power, | |
1628 | isp->otg.start_srp = isp1301_start_srp, | |
1629 | isp->otg.start_hnp = isp1301_start_hnp, | |
1630 | ||
1631 | enable_vbus_draw(isp, 0); | |
1632 | power_down(isp); | |
1633 | the_transceiver = isp; | |
1634 | ||
1635 | #ifdef CONFIG_USB_OTG | |
1636 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
1637 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
1638 | #endif | |
1639 | ||
08882d20 | 1640 | dump_regs(isp, __func__); |
1da177e4 LT |
1641 | |
1642 | #ifdef VERBOSE | |
1643 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1644 | dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); | |
1645 | #endif | |
1646 | ||
1647 | status = otg_set_transceiver(&isp->otg); | |
1648 | if (status < 0) | |
1649 | dev_err(&i2c->dev, "can't register transceiver, %d\n", | |
1650 | status); | |
1651 | ||
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | static int isp1301_scan_bus(struct i2c_adapter *bus) | |
1656 | { | |
1657 | if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA | |
1658 | | I2C_FUNC_SMBUS_READ_WORD_DATA)) | |
1659 | return -EINVAL; | |
1660 | return i2c_probe(bus, &addr_data, isp1301_probe); | |
1661 | } | |
1662 | ||
1663 | static struct i2c_driver isp1301_driver = { | |
a9718b0c | 1664 | .driver = { |
a9718b0c LR |
1665 | .name = "isp1301_omap", |
1666 | }, | |
1da177e4 LT |
1667 | .attach_adapter = isp1301_scan_bus, |
1668 | .detach_client = isp1301_detach_client, | |
1669 | }; | |
1670 | ||
1671 | /*-------------------------------------------------------------------------*/ | |
1672 | ||
1673 | static int __init isp_init(void) | |
1674 | { | |
1675 | return i2c_add_driver(&isp1301_driver); | |
1676 | } | |
1677 | module_init(isp_init); | |
1678 | ||
1679 | static void __exit isp_exit(void) | |
1680 | { | |
1681 | if (the_transceiver) | |
1682 | otg_set_transceiver(0); | |
1683 | i2c_del_driver(&isp1301_driver); | |
1684 | } | |
1685 | module_exit(isp_exit); | |
1686 |