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1da177e4 LT |
1 | /* |
2 | * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller | |
3 | * | |
4 | * Copyright (C) 2004 Texas Instruments | |
5 | * Copyright (C) 2004 David Brownell | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
1da177e4 | 21 | |
1da177e4 LT |
22 | #include <linux/kernel.h> |
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/interrupt.h> | |
d052d1be | 27 | #include <linux/platform_device.h> |
d1846b0e | 28 | #include <linux/gpio.h> |
5f848137 | 29 | #include <linux/usb/ch9.h> |
187426e6 | 30 | #include <linux/usb/gadget.h> |
1da177e4 | 31 | #include <linux/usb.h> |
3a16f7b4 | 32 | #include <linux/usb/otg.h> |
1da177e4 LT |
33 | #include <linux/i2c.h> |
34 | #include <linux/workqueue.h> | |
35 | ||
36 | #include <asm/irq.h> | |
d1846b0e DB |
37 | #include <asm/mach-types.h> |
38 | ||
70c494c3 | 39 | #include <mach/mux.h> |
1da177e4 | 40 | |
b924b204 | 41 | #include <mach/usb.h> |
1da177e4 LT |
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 { | |
819d1c74 | 55 | struct usb_phy phy; |
a5f08a32 | 56 | struct i2c_client *client; |
1da177e4 LT |
57 | void (*i2c_release)(struct device *dev); |
58 | ||
25da383d | 59 | int irq_type; |
1da177e4 LT |
60 | |
61 | u32 last_otg_ctrl; | |
62 | unsigned working:1; | |
63 | ||
64 | struct timer_list timer; | |
65 | ||
66 | /* use keventd context to change the state for us */ | |
67 | struct work_struct work; | |
25da383d | 68 | |
1da177e4 LT |
69 | unsigned long todo; |
70 | # define WORK_UPDATE_ISP 0 /* update ISP from OTG */ | |
71 | # define WORK_UPDATE_OTG 1 /* update OTG from ISP */ | |
72 | # define WORK_HOST_RESUME 4 /* resume host */ | |
73 | # define WORK_TIMER 6 /* timer fired */ | |
74 | # define WORK_STOP 7 /* don't resubmit */ | |
75 | }; | |
76 | ||
77 | ||
f35ae634 | 78 | /* bits in OTG_CTRL */ |
1da177e4 LT |
79 | |
80 | #define OTG_XCEIV_OUTPUTS \ | |
81 | (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) | |
82 | #define OTG_XCEIV_INPUTS \ | |
83 | (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) | |
84 | #define OTG_CTRL_BITS \ | |
85 | (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) | |
86 | /* and OTG_PULLUP is sometimes written */ | |
87 | ||
88 | #define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ | |
89 | OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ | |
90 | OTG_CTRL_BITS) | |
91 | ||
92 | ||
93 | /*-------------------------------------------------------------------------*/ | |
94 | ||
1da177e4 LT |
95 | /* board-specific PM hooks */ |
96 | ||
d1846b0e | 97 | #if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3) |
1da177e4 LT |
98 | |
99 | #if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE) | |
100 | ||
6d16bfb5 | 101 | #include <linux/i2c/tps65010.h> |
1da177e4 LT |
102 | |
103 | #else | |
104 | ||
105 | static inline int tps65010_set_vbus_draw(unsigned mA) | |
106 | { | |
107 | pr_debug("tps65010: draw %d mA (STUB)\n", mA); | |
108 | return 0; | |
109 | } | |
110 | ||
111 | #endif | |
112 | ||
113 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
114 | { | |
115 | int status = tps65010_set_vbus_draw(mA); | |
116 | if (status < 0) | |
117 | pr_debug(" VBUS %d mA error %d\n", mA, status); | |
118 | } | |
119 | ||
d77282c8 | 120 | #else |
d1846b0e DB |
121 | |
122 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
123 | { | |
124 | /* H4 controls this by DIP switch S2.4; no soft control. | |
125 | * ON means the charger is always enabled. Leave it OFF | |
126 | * unless the OTG port is used only in B-peripheral mode. | |
127 | */ | |
128 | } | |
129 | ||
d77282c8 AG |
130 | #endif |
131 | ||
d1846b0e DB |
132 | static void enable_vbus_source(struct isp1301 *isp) |
133 | { | |
134 | /* this board won't supply more than 8mA vbus power. | |
135 | * some boards can switch a 100ma "unit load" (or more). | |
136 | */ | |
137 | } | |
138 | ||
139 | ||
140 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
141 | static inline void notresponding(struct isp1301 *isp) | |
142 | { | |
143 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
144 | } | |
145 | ||
146 | ||
1da177e4 LT |
147 | /*-------------------------------------------------------------------------*/ |
148 | ||
1da177e4 LT |
149 | static struct i2c_driver isp1301_driver; |
150 | ||
151 | /* smbus apis are used for portability */ | |
152 | ||
153 | static inline u8 | |
154 | isp1301_get_u8(struct isp1301 *isp, u8 reg) | |
155 | { | |
a5f08a32 | 156 | return i2c_smbus_read_byte_data(isp->client, reg + 0); |
1da177e4 LT |
157 | } |
158 | ||
159 | static inline int | |
160 | isp1301_get_u16(struct isp1301 *isp, u8 reg) | |
161 | { | |
a5f08a32 | 162 | return i2c_smbus_read_word_data(isp->client, reg); |
1da177e4 LT |
163 | } |
164 | ||
165 | static inline int | |
166 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
167 | { | |
a5f08a32 | 168 | return i2c_smbus_write_byte_data(isp->client, reg + 0, bits); |
1da177e4 LT |
169 | } |
170 | ||
171 | static inline int | |
172 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
173 | { | |
a5f08a32 | 174 | return i2c_smbus_write_byte_data(isp->client, reg + 1, bits); |
1da177e4 LT |
175 | } |
176 | ||
177 | /*-------------------------------------------------------------------------*/ | |
178 | ||
179 | /* identification */ | |
180 | #define ISP1301_VENDOR_ID 0x00 /* u16 read */ | |
181 | #define ISP1301_PRODUCT_ID 0x02 /* u16 read */ | |
182 | #define ISP1301_BCD_DEVICE 0x14 /* u16 read */ | |
183 | ||
184 | #define I2C_VENDOR_ID_PHILIPS 0x04cc | |
185 | #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 | |
186 | ||
187 | /* operational registers */ | |
188 | #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ | |
f35ae634 TL |
189 | # define MC1_SPEED (1 << 0) |
190 | # define MC1_SUSPEND (1 << 1) | |
1da177e4 LT |
191 | # define MC1_DAT_SE0 (1 << 2) |
192 | # define MC1_TRANSPARENT (1 << 3) | |
193 | # define MC1_BDIS_ACON_EN (1 << 4) | |
194 | # define MC1_OE_INT_EN (1 << 5) | |
195 | # define MC1_UART_EN (1 << 6) | |
196 | # define MC1_MASK 0x7f | |
197 | #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ | |
198 | # define MC2_GLOBAL_PWR_DN (1 << 0) | |
199 | # define MC2_SPD_SUSP_CTRL (1 << 1) | |
200 | # define MC2_BI_DI (1 << 2) | |
201 | # define MC2_TRANSP_BDIR0 (1 << 3) | |
202 | # define MC2_TRANSP_BDIR1 (1 << 4) | |
203 | # define MC2_AUDIO_EN (1 << 5) | |
204 | # define MC2_PSW_EN (1 << 6) | |
205 | # define MC2_EN2V7 (1 << 7) | |
206 | #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ | |
207 | # define OTG1_DP_PULLUP (1 << 0) | |
208 | # define OTG1_DM_PULLUP (1 << 1) | |
209 | # define OTG1_DP_PULLDOWN (1 << 2) | |
210 | # define OTG1_DM_PULLDOWN (1 << 3) | |
211 | # define OTG1_ID_PULLDOWN (1 << 4) | |
212 | # define OTG1_VBUS_DRV (1 << 5) | |
213 | # define OTG1_VBUS_DISCHRG (1 << 6) | |
214 | # define OTG1_VBUS_CHRG (1 << 7) | |
215 | #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ | |
216 | # define OTG_B_SESS_END (1 << 6) | |
217 | # define OTG_B_SESS_VLD (1 << 7) | |
218 | ||
219 | #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ | |
220 | #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ | |
221 | ||
222 | #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ | |
223 | #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ | |
224 | ||
225 | /* same bitfields in all interrupt registers */ | |
226 | # define INTR_VBUS_VLD (1 << 0) | |
227 | # define INTR_SESS_VLD (1 << 1) | |
228 | # define INTR_DP_HI (1 << 2) | |
229 | # define INTR_ID_GND (1 << 3) | |
230 | # define INTR_DM_HI (1 << 4) | |
231 | # define INTR_ID_FLOAT (1 << 5) | |
232 | # define INTR_BDIS_ACON (1 << 6) | |
233 | # define INTR_CR_INT (1 << 7) | |
234 | ||
235 | /*-------------------------------------------------------------------------*/ | |
236 | ||
1da177e4 LT |
237 | static inline const char *state_name(struct isp1301 *isp) |
238 | { | |
819d1c74 | 239 | return otg_state_string(isp->phy.state); |
1da177e4 LT |
240 | } |
241 | ||
1da177e4 LT |
242 | /*-------------------------------------------------------------------------*/ |
243 | ||
244 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; | |
245 | * not everything is guarded by board-specific checks, or even using | |
246 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. | |
247 | * | |
248 | * ALSO: this currently doesn't use ISP1301 low-power modes | |
249 | * while OTG is running. | |
250 | */ | |
251 | ||
252 | static void power_down(struct isp1301 *isp) | |
253 | { | |
819d1c74 | 254 | isp->phy.state = OTG_STATE_UNDEFINED; |
1da177e4 LT |
255 | |
256 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 257 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
1da177e4 LT |
258 | |
259 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); | |
260 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
261 | } | |
262 | ||
263 | static void power_up(struct isp1301 *isp) | |
264 | { | |
265 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 266 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
25da383d | 267 | |
1da177e4 LT |
268 | /* do this only when cpu is driving transceiver, |
269 | * so host won't see a low speed device... | |
270 | */ | |
271 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
272 | } | |
273 | ||
274 | #define NO_HOST_SUSPEND | |
275 | ||
276 | static int host_suspend(struct isp1301 *isp) | |
277 | { | |
278 | #ifdef NO_HOST_SUSPEND | |
279 | return 0; | |
280 | #else | |
281 | struct device *dev; | |
282 | ||
819d1c74 | 283 | if (!isp->phy.otg->host) |
1da177e4 LT |
284 | return -ENODEV; |
285 | ||
286 | /* Currently ASSUMES only the OTG port matters; | |
287 | * other ports could be active... | |
288 | */ | |
819d1c74 | 289 | dev = isp->phy.otg->host->controller; |
1da177e4 LT |
290 | return dev->driver->suspend(dev, 3, 0); |
291 | #endif | |
292 | } | |
293 | ||
294 | static int host_resume(struct isp1301 *isp) | |
295 | { | |
296 | #ifdef NO_HOST_SUSPEND | |
297 | return 0; | |
298 | #else | |
299 | struct device *dev; | |
300 | ||
819d1c74 | 301 | if (!isp->phy.otg->host) |
1da177e4 LT |
302 | return -ENODEV; |
303 | ||
819d1c74 | 304 | dev = isp->phy.otg->host->controller; |
1da177e4 LT |
305 | return dev->driver->resume(dev, 0); |
306 | #endif | |
307 | } | |
308 | ||
309 | static int gadget_suspend(struct isp1301 *isp) | |
310 | { | |
819d1c74 HK |
311 | isp->phy.otg->gadget->b_hnp_enable = 0; |
312 | isp->phy.otg->gadget->a_hnp_support = 0; | |
313 | isp->phy.otg->gadget->a_alt_hnp_support = 0; | |
314 | return usb_gadget_vbus_disconnect(isp->phy.otg->gadget); | |
1da177e4 LT |
315 | } |
316 | ||
317 | /*-------------------------------------------------------------------------*/ | |
318 | ||
319 | #define TIMER_MINUTES 10 | |
320 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) | |
321 | ||
322 | /* Almost all our I2C messaging comes from a work queue's task context. | |
323 | * NOTE: guaranteeing certain response times might mean we shouldn't | |
324 | * share keventd's work queue; a realtime task might be safest. | |
325 | */ | |
d1846b0e | 326 | static void isp1301_defer_work(struct isp1301 *isp, int work) |
1da177e4 LT |
327 | { |
328 | int status; | |
329 | ||
330 | if (isp && !test_and_set_bit(work, &isp->todo)) { | |
a5f08a32 | 331 | (void) get_device(&isp->client->dev); |
1da177e4 LT |
332 | status = schedule_work(&isp->work); |
333 | if (!status && !isp->working) | |
a5f08a32 | 334 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
335 | "work item %d may be lost\n", work); |
336 | } | |
337 | } | |
338 | ||
339 | /* called from irq handlers */ | |
340 | static void a_idle(struct isp1301 *isp, const char *tag) | |
341 | { | |
f35ae634 TL |
342 | u32 l; |
343 | ||
819d1c74 | 344 | if (isp->phy.state == OTG_STATE_A_IDLE) |
1da177e4 LT |
345 | return; |
346 | ||
819d1c74 HK |
347 | isp->phy.otg->default_a = 1; |
348 | if (isp->phy.otg->host) { | |
349 | isp->phy.otg->host->is_b_host = 0; | |
1da177e4 LT |
350 | host_suspend(isp); |
351 | } | |
819d1c74 HK |
352 | if (isp->phy.otg->gadget) { |
353 | isp->phy.otg->gadget->is_a_peripheral = 1; | |
1da177e4 LT |
354 | gadget_suspend(isp); |
355 | } | |
819d1c74 | 356 | isp->phy.state = OTG_STATE_A_IDLE; |
f35ae634 TL |
357 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
358 | omap_writel(l, OTG_CTRL); | |
359 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
360 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
361 | } | |
362 | ||
363 | /* called from irq handlers */ | |
364 | static void b_idle(struct isp1301 *isp, const char *tag) | |
365 | { | |
f35ae634 TL |
366 | u32 l; |
367 | ||
819d1c74 | 368 | if (isp->phy.state == OTG_STATE_B_IDLE) |
1da177e4 LT |
369 | return; |
370 | ||
819d1c74 HK |
371 | isp->phy.otg->default_a = 0; |
372 | if (isp->phy.otg->host) { | |
373 | isp->phy.otg->host->is_b_host = 1; | |
1da177e4 LT |
374 | host_suspend(isp); |
375 | } | |
819d1c74 HK |
376 | if (isp->phy.otg->gadget) { |
377 | isp->phy.otg->gadget->is_a_peripheral = 0; | |
1da177e4 LT |
378 | gadget_suspend(isp); |
379 | } | |
819d1c74 | 380 | isp->phy.state = OTG_STATE_B_IDLE; |
f35ae634 TL |
381 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
382 | omap_writel(l, OTG_CTRL); | |
383 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
384 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
385 | } | |
386 | ||
387 | static void | |
388 | dump_regs(struct isp1301 *isp, const char *label) | |
389 | { | |
390 | #ifdef DEBUG | |
391 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); | |
392 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
393 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
394 | ||
395 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", | |
f35ae634 | 396 | omap_readl(OTG_CTRL), label, state_name(isp), |
1da177e4 LT |
397 | ctrl, status, src); |
398 | /* mode control and irq enables don't change much */ | |
399 | #endif | |
400 | } | |
401 | ||
402 | /*-------------------------------------------------------------------------*/ | |
403 | ||
404 | #ifdef CONFIG_USB_OTG | |
405 | ||
406 | /* | |
407 | * The OMAP OTG controller handles most of the OTG state transitions. | |
408 | * | |
409 | * We translate isp1301 outputs (mostly voltage comparator status) into | |
410 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state | |
411 | * flags into isp1301 inputs ... and infer state transitions. | |
412 | */ | |
413 | ||
414 | #ifdef VERBOSE | |
415 | ||
416 | static void check_state(struct isp1301 *isp, const char *tag) | |
417 | { | |
418 | enum usb_otg_state state = OTG_STATE_UNDEFINED; | |
f35ae634 | 419 | u8 fsm = omap_readw(OTG_TEST) & 0x0ff; |
1da177e4 LT |
420 | unsigned extra = 0; |
421 | ||
422 | switch (fsm) { | |
423 | ||
424 | /* default-b */ | |
425 | case 0x0: | |
426 | state = OTG_STATE_B_IDLE; | |
427 | break; | |
428 | case 0x3: | |
429 | case 0x7: | |
430 | extra = 1; | |
431 | case 0x1: | |
432 | state = OTG_STATE_B_PERIPHERAL; | |
433 | break; | |
434 | case 0x11: | |
435 | state = OTG_STATE_B_SRP_INIT; | |
436 | break; | |
437 | ||
438 | /* extra dual-role default-b states */ | |
439 | case 0x12: | |
440 | case 0x13: | |
441 | case 0x16: | |
442 | extra = 1; | |
443 | case 0x17: | |
444 | state = OTG_STATE_B_WAIT_ACON; | |
445 | break; | |
446 | case 0x34: | |
447 | state = OTG_STATE_B_HOST; | |
448 | break; | |
449 | ||
450 | /* default-a */ | |
451 | case 0x36: | |
452 | state = OTG_STATE_A_IDLE; | |
453 | break; | |
454 | case 0x3c: | |
455 | state = OTG_STATE_A_WAIT_VFALL; | |
456 | break; | |
457 | case 0x7d: | |
458 | state = OTG_STATE_A_VBUS_ERR; | |
459 | break; | |
460 | case 0x9e: | |
461 | case 0x9f: | |
462 | extra = 1; | |
463 | case 0x89: | |
464 | state = OTG_STATE_A_PERIPHERAL; | |
465 | break; | |
466 | case 0xb7: | |
467 | state = OTG_STATE_A_WAIT_VRISE; | |
468 | break; | |
469 | case 0xb8: | |
470 | state = OTG_STATE_A_WAIT_BCON; | |
471 | break; | |
472 | case 0xb9: | |
473 | state = OTG_STATE_A_HOST; | |
474 | break; | |
475 | case 0xba: | |
476 | state = OTG_STATE_A_SUSPEND; | |
477 | break; | |
478 | default: | |
479 | break; | |
480 | } | |
819d1c74 | 481 | if (isp->phy.state == state && !extra) |
1da177e4 LT |
482 | return; |
483 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, | |
3dacdf11 | 484 | otg_state_string(state), fsm, state_name(isp), |
f35ae634 | 485 | omap_readl(OTG_CTRL)); |
1da177e4 LT |
486 | } |
487 | ||
488 | #else | |
489 | ||
490 | static inline void check_state(struct isp1301 *isp, const char *tag) { } | |
491 | ||
492 | #endif | |
493 | ||
494 | /* outputs from ISP1301_INTERRUPT_SOURCE */ | |
495 | static void update_otg1(struct isp1301 *isp, u8 int_src) | |
496 | { | |
497 | u32 otg_ctrl; | |
498 | ||
f35ae634 TL |
499 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
500 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
501 | otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); | |
502 | ||
1da177e4 LT |
503 | if (int_src & INTR_SESS_VLD) |
504 | otg_ctrl |= OTG_ASESSVLD; | |
819d1c74 | 505 | else if (isp->phy.state == OTG_STATE_A_WAIT_VFALL) { |
1da177e4 LT |
506 | a_idle(isp, "vfall"); |
507 | otg_ctrl &= ~OTG_CTRL_BITS; | |
508 | } | |
509 | if (int_src & INTR_VBUS_VLD) | |
510 | otg_ctrl |= OTG_VBUSVLD; | |
511 | if (int_src & INTR_ID_GND) { /* default-A */ | |
819d1c74 HK |
512 | if (isp->phy.state == OTG_STATE_B_IDLE |
513 | || isp->phy.state | |
514 | == OTG_STATE_UNDEFINED) { | |
1da177e4 LT |
515 | a_idle(isp, "init"); |
516 | return; | |
517 | } | |
518 | } else { /* default-B */ | |
519 | otg_ctrl |= OTG_ID; | |
819d1c74 HK |
520 | if (isp->phy.state == OTG_STATE_A_IDLE |
521 | || isp->phy.state == OTG_STATE_UNDEFINED) { | |
1da177e4 LT |
522 | b_idle(isp, "init"); |
523 | return; | |
524 | } | |
525 | } | |
f35ae634 | 526 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
527 | } |
528 | ||
529 | /* outputs from ISP1301_OTG_STATUS */ | |
530 | static void update_otg2(struct isp1301 *isp, u8 otg_status) | |
531 | { | |
532 | u32 otg_ctrl; | |
533 | ||
f35ae634 TL |
534 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
535 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
536 | otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND); | |
1da177e4 LT |
537 | if (otg_status & OTG_B_SESS_VLD) |
538 | otg_ctrl |= OTG_BSESSVLD; | |
539 | else if (otg_status & OTG_B_SESS_END) | |
540 | otg_ctrl |= OTG_BSESSEND; | |
f35ae634 | 541 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
542 | } |
543 | ||
544 | /* inputs going to ISP1301 */ | |
545 | static void otg_update_isp(struct isp1301 *isp) | |
546 | { | |
547 | u32 otg_ctrl, otg_change; | |
548 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; | |
549 | ||
f35ae634 | 550 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
551 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; |
552 | isp->last_otg_ctrl = otg_ctrl; | |
553 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; | |
554 | ||
819d1c74 | 555 | switch (isp->phy.state) { |
1da177e4 LT |
556 | case OTG_STATE_B_IDLE: |
557 | case OTG_STATE_B_PERIPHERAL: | |
558 | case OTG_STATE_B_SRP_INIT: | |
559 | if (!(otg_ctrl & OTG_PULLUP)) { | |
560 | // if (otg_ctrl & OTG_B_HNPEN) { | |
819d1c74 HK |
561 | if (isp->phy.otg->gadget->b_hnp_enable) { |
562 | isp->phy.state = OTG_STATE_B_WAIT_ACON; | |
1da177e4 LT |
563 | pr_debug(" --> b_wait_acon\n"); |
564 | } | |
565 | goto pulldown; | |
566 | } | |
567 | pullup: | |
568 | set |= OTG1_DP_PULLUP; | |
569 | clr |= OTG1_DP_PULLDOWN; | |
570 | break; | |
571 | case OTG_STATE_A_SUSPEND: | |
572 | case OTG_STATE_A_PERIPHERAL: | |
573 | if (otg_ctrl & OTG_PULLUP) | |
574 | goto pullup; | |
575 | /* FALLTHROUGH */ | |
576 | // case OTG_STATE_B_WAIT_ACON: | |
577 | default: | |
578 | pulldown: | |
579 | set |= OTG1_DP_PULLDOWN; | |
580 | clr |= OTG1_DP_PULLUP; | |
581 | break; | |
582 | } | |
583 | ||
584 | # define toggle(OTG,ISP) do { \ | |
585 | if (otg_ctrl & OTG) set |= ISP; \ | |
586 | else clr |= ISP; \ | |
587 | } while (0) | |
588 | ||
819d1c74 | 589 | if (!(isp->phy.otg->host)) |
1da177e4 LT |
590 | otg_ctrl &= ~OTG_DRV_VBUS; |
591 | ||
819d1c74 | 592 | switch (isp->phy.state) { |
1da177e4 LT |
593 | case OTG_STATE_A_SUSPEND: |
594 | if (otg_ctrl & OTG_DRV_VBUS) { | |
595 | set |= OTG1_VBUS_DRV; | |
596 | break; | |
597 | } | |
598 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ | |
599 | notresponding(isp); | |
600 | ||
601 | /* FALLTHROUGH */ | |
602 | case OTG_STATE_A_VBUS_ERR: | |
819d1c74 | 603 | isp->phy.state = OTG_STATE_A_WAIT_VFALL; |
1da177e4 LT |
604 | pr_debug(" --> a_wait_vfall\n"); |
605 | /* FALLTHROUGH */ | |
606 | case OTG_STATE_A_WAIT_VFALL: | |
607 | /* FIXME usbcore thinks port power is still on ... */ | |
608 | clr |= OTG1_VBUS_DRV; | |
609 | break; | |
610 | case OTG_STATE_A_IDLE: | |
611 | if (otg_ctrl & OTG_DRV_VBUS) { | |
819d1c74 | 612 | isp->phy.state = OTG_STATE_A_WAIT_VRISE; |
1da177e4 LT |
613 | pr_debug(" --> a_wait_vrise\n"); |
614 | } | |
615 | /* FALLTHROUGH */ | |
616 | default: | |
617 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); | |
618 | } | |
619 | ||
620 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); | |
621 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); | |
622 | ||
623 | # undef toggle | |
624 | ||
625 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); | |
626 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); | |
627 | ||
628 | /* HNP switch to host or peripheral; and SRP */ | |
629 | if (otg_change & OTG_PULLUP) { | |
f35ae634 TL |
630 | u32 l; |
631 | ||
819d1c74 | 632 | switch (isp->phy.state) { |
1da177e4 LT |
633 | case OTG_STATE_B_IDLE: |
634 | if (clr & OTG1_DP_PULLUP) | |
635 | break; | |
819d1c74 | 636 | isp->phy.state = OTG_STATE_B_PERIPHERAL; |
1da177e4 LT |
637 | pr_debug(" --> b_peripheral\n"); |
638 | break; | |
639 | case OTG_STATE_A_SUSPEND: | |
640 | if (clr & OTG1_DP_PULLUP) | |
641 | break; | |
819d1c74 | 642 | isp->phy.state = OTG_STATE_A_PERIPHERAL; |
1da177e4 LT |
643 | pr_debug(" --> a_peripheral\n"); |
644 | break; | |
645 | default: | |
646 | break; | |
647 | } | |
f35ae634 TL |
648 | l = omap_readl(OTG_CTRL); |
649 | l |= OTG_PULLUP; | |
650 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
651 | } |
652 | ||
08882d20 | 653 | check_state(isp, __func__); |
1da177e4 LT |
654 | dump_regs(isp, "otg->isp1301"); |
655 | } | |
656 | ||
7d12e780 | 657 | static irqreturn_t omap_otg_irq(int irq, void *_isp) |
1da177e4 | 658 | { |
f35ae634 | 659 | u16 otg_irq = omap_readw(OTG_IRQ_SRC); |
1da177e4 LT |
660 | u32 otg_ctrl; |
661 | int ret = IRQ_NONE; | |
662 | struct isp1301 *isp = _isp; | |
819d1c74 | 663 | struct usb_otg *otg = isp->phy.otg; |
1da177e4 | 664 | |
7c9d440e | 665 | /* update ISP1301 transceiver from OTG controller */ |
1da177e4 | 666 | if (otg_irq & OPRT_CHG) { |
f35ae634 | 667 | omap_writew(OPRT_CHG, OTG_IRQ_SRC); |
1da177e4 LT |
668 | isp1301_defer_work(isp, WORK_UPDATE_ISP); |
669 | ret = IRQ_HANDLED; | |
670 | ||
671 | /* SRP to become b_peripheral failed */ | |
672 | } else if (otg_irq & B_SRP_TMROUT) { | |
f35ae634 | 673 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL)); |
1da177e4 LT |
674 | notresponding(isp); |
675 | ||
676 | /* gadget drivers that care should monitor all kinds of | |
677 | * remote wakeup (SRP, normal) using their own timer | |
678 | * to give "check cable and A-device" messages. | |
679 | */ | |
819d1c74 | 680 | if (isp->phy.state == OTG_STATE_B_SRP_INIT) |
1da177e4 LT |
681 | b_idle(isp, "srp_timeout"); |
682 | ||
f35ae634 | 683 | omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
684 | ret = IRQ_HANDLED; |
685 | ||
686 | /* HNP to become b_host failed */ | |
687 | } else if (otg_irq & B_HNP_FAIL) { | |
688 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", | |
f35ae634 | 689 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
690 | notresponding(isp); |
691 | ||
f35ae634 | 692 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
693 | otg_ctrl |= OTG_BUSDROP; |
694 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 695 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
696 | |
697 | /* subset of b_peripheral()... */ | |
819d1c74 | 698 | isp->phy.state = OTG_STATE_B_PERIPHERAL; |
1da177e4 LT |
699 | pr_debug(" --> b_peripheral\n"); |
700 | ||
f35ae634 | 701 | omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); |
1da177e4 LT |
702 | ret = IRQ_HANDLED; |
703 | ||
704 | /* detect SRP from B-device ... */ | |
705 | } else if (otg_irq & A_SRP_DETECT) { | |
706 | pr_debug("otg: %s SRP_DETECT, %06x\n", | |
f35ae634 | 707 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
708 | |
709 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
819d1c74 | 710 | switch (isp->phy.state) { |
1da177e4 | 711 | case OTG_STATE_A_IDLE: |
819d1c74 | 712 | if (!otg->host) |
1da177e4 LT |
713 | break; |
714 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
f35ae634 | 715 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
716 | otg_ctrl |= OTG_A_BUSREQ; |
717 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
718 | & ~OTG_XCEIV_INPUTS | |
719 | & OTG_CTRL_MASK; | |
f35ae634 | 720 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
721 | break; |
722 | default: | |
723 | break; | |
724 | } | |
725 | ||
f35ae634 | 726 | omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); |
1da177e4 LT |
727 | ret = IRQ_HANDLED; |
728 | ||
729 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) | |
730 | * we don't track them separately | |
731 | */ | |
732 | } else if (otg_irq & A_REQ_TMROUT) { | |
f35ae634 | 733 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
734 | pr_info("otg: BCON_TMOUT from %s, %06x\n", |
735 | state_name(isp), otg_ctrl); | |
736 | notresponding(isp); | |
737 | ||
738 | otg_ctrl |= OTG_BUSDROP; | |
739 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 740 | omap_writel(otg_ctrl, OTG_CTRL); |
819d1c74 | 741 | isp->phy.state = OTG_STATE_A_WAIT_VFALL; |
1da177e4 | 742 | |
f35ae634 | 743 | omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
744 | ret = IRQ_HANDLED; |
745 | ||
746 | /* A-supplied voltage fell too low; overcurrent */ | |
747 | } else if (otg_irq & A_VBUS_ERR) { | |
f35ae634 | 748 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
749 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", |
750 | state_name(isp), otg_irq, otg_ctrl); | |
751 | ||
752 | otg_ctrl |= OTG_BUSDROP; | |
753 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 754 | omap_writel(otg_ctrl, OTG_CTRL); |
819d1c74 | 755 | isp->phy.state = OTG_STATE_A_VBUS_ERR; |
1da177e4 | 756 | |
f35ae634 | 757 | omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); |
1da177e4 LT |
758 | ret = IRQ_HANDLED; |
759 | ||
7c9d440e | 760 | /* switch driver; the transceiver code activates it, |
1da177e4 LT |
761 | * ungating the udc clock or resuming OHCI. |
762 | */ | |
763 | } else if (otg_irq & DRIVER_SWITCH) { | |
764 | int kick = 0; | |
765 | ||
f35ae634 | 766 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
767 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", |
768 | state_name(isp), | |
769 | (otg_ctrl & OTG_DRIVER_SEL) | |
770 | ? "gadget" : "host", | |
771 | otg_ctrl); | |
772 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
773 | ||
774 | /* role is peripheral */ | |
775 | if (otg_ctrl & OTG_DRIVER_SEL) { | |
819d1c74 | 776 | switch (isp->phy.state) { |
1da177e4 | 777 | case OTG_STATE_A_IDLE: |
08882d20 | 778 | b_idle(isp, __func__); |
1da177e4 LT |
779 | break; |
780 | default: | |
781 | break; | |
782 | } | |
783 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
784 | ||
785 | /* role is host */ | |
786 | } else { | |
787 | if (!(otg_ctrl & OTG_ID)) { | |
25da383d | 788 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
f35ae634 | 789 | omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL); |
1da177e4 LT |
790 | } |
791 | ||
819d1c74 HK |
792 | if (otg->host) { |
793 | switch (isp->phy.state) { | |
1da177e4 | 794 | case OTG_STATE_B_WAIT_ACON: |
819d1c74 | 795 | isp->phy.state = OTG_STATE_B_HOST; |
1da177e4 LT |
796 | pr_debug(" --> b_host\n"); |
797 | kick = 1; | |
798 | break; | |
799 | case OTG_STATE_A_WAIT_BCON: | |
819d1c74 | 800 | isp->phy.state = OTG_STATE_A_HOST; |
1da177e4 LT |
801 | pr_debug(" --> a_host\n"); |
802 | break; | |
803 | case OTG_STATE_A_PERIPHERAL: | |
819d1c74 | 804 | isp->phy.state = OTG_STATE_A_WAIT_BCON; |
1da177e4 LT |
805 | pr_debug(" --> a_wait_bcon\n"); |
806 | break; | |
807 | default: | |
808 | break; | |
809 | } | |
810 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
811 | } | |
812 | } | |
813 | ||
f35ae634 | 814 | omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); |
1da177e4 LT |
815 | ret = IRQ_HANDLED; |
816 | ||
817 | if (kick) | |
819d1c74 | 818 | usb_bus_start_enum(otg->host, otg->host->otg_port); |
1da177e4 LT |
819 | } |
820 | ||
08882d20 | 821 | check_state(isp, __func__); |
1da177e4 LT |
822 | return ret; |
823 | } | |
824 | ||
825 | static struct platform_device *otg_dev; | |
826 | ||
465f8294 | 827 | static int isp1301_otg_init(struct isp1301 *isp) |
1da177e4 | 828 | { |
f35ae634 TL |
829 | u32 l; |
830 | ||
1da177e4 LT |
831 | if (!otg_dev) |
832 | return -ENODEV; | |
833 | ||
08882d20 | 834 | dump_regs(isp, __func__); |
1da177e4 | 835 | /* some of these values are board-specific... */ |
f35ae634 TL |
836 | l = omap_readl(OTG_SYSCON_2); |
837 | l |= OTG_EN | |
1da177e4 LT |
838 | /* for B-device: */ |
839 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ | |
840 | | SRP_GPDVBUS /* discharge after VBUS pulse */ | |
841 | // | (3 << 24) /* 2msec VBUS pulse */ | |
842 | /* for A-device: */ | |
843 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ | |
844 | | SRP_DPW /* detect 167+ns SRP pulses */ | |
845 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ | |
846 | ; | |
f35ae634 | 847 | omap_writel(l, OTG_SYSCON_2); |
1da177e4 LT |
848 | |
849 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
850 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
851 | ||
08882d20 | 852 | check_state(isp, __func__); |
1da177e4 | 853 | pr_debug("otg: %s, %s %06x\n", |
f35ae634 | 854 | state_name(isp), __func__, omap_readl(OTG_CTRL)); |
1da177e4 | 855 | |
f35ae634 | 856 | omap_writew(DRIVER_SWITCH | OPRT_CHG |
1da177e4 | 857 | | B_SRP_TMROUT | B_HNP_FAIL |
f35ae634 TL |
858 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN); |
859 | ||
860 | l = omap_readl(OTG_SYSCON_2); | |
861 | l |= OTG_EN; | |
862 | omap_writel(l, OTG_SYSCON_2); | |
1da177e4 LT |
863 | |
864 | return 0; | |
865 | } | |
866 | ||
3ae5eaec | 867 | static int otg_probe(struct platform_device *dev) |
1da177e4 LT |
868 | { |
869 | // struct omap_usb_config *config = dev->platform_data; | |
870 | ||
3ae5eaec | 871 | otg_dev = dev; |
1da177e4 LT |
872 | return 0; |
873 | } | |
874 | ||
3ae5eaec | 875 | static int otg_remove(struct platform_device *dev) |
1da177e4 | 876 | { |
d1846b0e | 877 | otg_dev = NULL; |
1da177e4 LT |
878 | return 0; |
879 | } | |
880 | ||
d1846b0e | 881 | static struct platform_driver omap_otg_driver = { |
1da177e4 | 882 | .probe = otg_probe, |
3ae5eaec RK |
883 | .remove = otg_remove, |
884 | .driver = { | |
885 | .owner = THIS_MODULE, | |
886 | .name = "omap_otg", | |
887 | }, | |
1da177e4 LT |
888 | }; |
889 | ||
890 | static int otg_bind(struct isp1301 *isp) | |
891 | { | |
892 | int status; | |
893 | ||
894 | if (otg_dev) | |
895 | return -EBUSY; | |
896 | ||
3ae5eaec | 897 | status = platform_driver_register(&omap_otg_driver); |
1da177e4 LT |
898 | if (status < 0) |
899 | return status; | |
900 | ||
901 | if (otg_dev) | |
902 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, | |
b5dd18d8 | 903 | 0, DRIVER_NAME, isp); |
1da177e4 LT |
904 | else |
905 | status = -ENODEV; | |
906 | ||
907 | if (status < 0) | |
3ae5eaec | 908 | platform_driver_unregister(&omap_otg_driver); |
1da177e4 LT |
909 | return status; |
910 | } | |
911 | ||
912 | static void otg_unbind(struct isp1301 *isp) | |
913 | { | |
914 | if (!otg_dev) | |
915 | return; | |
916 | free_irq(otg_dev->resource[1].start, isp); | |
917 | } | |
918 | ||
919 | #else | |
920 | ||
921 | /* OTG controller isn't clocked */ | |
922 | ||
923 | #endif /* CONFIG_USB_OTG */ | |
924 | ||
925 | /*-------------------------------------------------------------------------*/ | |
926 | ||
927 | static void b_peripheral(struct isp1301 *isp) | |
928 | { | |
f35ae634 TL |
929 | u32 l; |
930 | ||
931 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; | |
932 | omap_writel(l, OTG_CTRL); | |
933 | ||
819d1c74 | 934 | usb_gadget_vbus_connect(isp->phy.otg->gadget); |
1da177e4 LT |
935 | |
936 | #ifdef CONFIG_USB_OTG | |
937 | enable_vbus_draw(isp, 8); | |
938 | otg_update_isp(isp); | |
939 | #else | |
940 | enable_vbus_draw(isp, 100); | |
941 | /* UDC driver just set OTG_BSESSVLD */ | |
942 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); | |
943 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); | |
819d1c74 | 944 | isp->phy.state = OTG_STATE_B_PERIPHERAL; |
1da177e4 LT |
945 | pr_debug(" --> b_peripheral\n"); |
946 | dump_regs(isp, "2periph"); | |
947 | #endif | |
948 | } | |
949 | ||
950 | static void isp_update_otg(struct isp1301 *isp, u8 stat) | |
951 | { | |
819d1c74 | 952 | struct usb_otg *otg = isp->phy.otg; |
1da177e4 | 953 | u8 isp_stat, isp_bstat; |
819d1c74 | 954 | enum usb_otg_state state = isp->phy.state; |
1da177e4 LT |
955 | |
956 | if (stat & INTR_BDIS_ACON) | |
957 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); | |
958 | ||
959 | /* start certain state transitions right away */ | |
960 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
961 | if (isp_stat & INTR_ID_GND) { | |
819d1c74 | 962 | if (otg->default_a) { |
1da177e4 LT |
963 | switch (state) { |
964 | case OTG_STATE_B_IDLE: | |
965 | a_idle(isp, "idle"); | |
966 | /* FALLTHROUGH */ | |
967 | case OTG_STATE_A_IDLE: | |
968 | enable_vbus_source(isp); | |
969 | /* FALLTHROUGH */ | |
970 | case OTG_STATE_A_WAIT_VRISE: | |
971 | /* we skip over OTG_STATE_A_WAIT_BCON, since | |
972 | * the HC will transition to A_HOST (or | |
973 | * A_SUSPEND!) without our noticing except | |
974 | * when HNP is used. | |
975 | */ | |
976 | if (isp_stat & INTR_VBUS_VLD) | |
819d1c74 | 977 | isp->phy.state = OTG_STATE_A_HOST; |
1da177e4 LT |
978 | break; |
979 | case OTG_STATE_A_WAIT_VFALL: | |
980 | if (!(isp_stat & INTR_SESS_VLD)) | |
981 | a_idle(isp, "vfell"); | |
982 | break; | |
983 | default: | |
984 | if (!(isp_stat & INTR_VBUS_VLD)) | |
819d1c74 | 985 | isp->phy.state = OTG_STATE_A_VBUS_ERR; |
1da177e4 LT |
986 | break; |
987 | } | |
988 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
989 | } else { | |
990 | switch (state) { | |
991 | case OTG_STATE_B_PERIPHERAL: | |
992 | case OTG_STATE_B_HOST: | |
993 | case OTG_STATE_B_WAIT_ACON: | |
819d1c74 | 994 | usb_gadget_vbus_disconnect(otg->gadget); |
1da177e4 LT |
995 | break; |
996 | default: | |
997 | break; | |
998 | } | |
999 | if (state != OTG_STATE_A_IDLE) | |
1000 | a_idle(isp, "id"); | |
819d1c74 | 1001 | if (otg->host && state == OTG_STATE_A_IDLE) |
1da177e4 LT |
1002 | isp1301_defer_work(isp, WORK_HOST_RESUME); |
1003 | isp_bstat = 0; | |
1004 | } | |
1005 | } else { | |
f35ae634 TL |
1006 | u32 l; |
1007 | ||
1da177e4 LT |
1008 | /* if user unplugged mini-A end of cable, |
1009 | * don't bypass A_WAIT_VFALL. | |
1010 | */ | |
819d1c74 | 1011 | if (otg->default_a) { |
1da177e4 LT |
1012 | switch (state) { |
1013 | default: | |
819d1c74 | 1014 | isp->phy.state = OTG_STATE_A_WAIT_VFALL; |
1da177e4 LT |
1015 | break; |
1016 | case OTG_STATE_A_WAIT_VFALL: | |
1017 | state = OTG_STATE_A_IDLE; | |
1018 | /* khubd may take a while to notice and | |
1019 | * handle this disconnect, so don't go | |
1020 | * to B_IDLE quite yet. | |
1021 | */ | |
1022 | break; | |
1023 | case OTG_STATE_A_IDLE: | |
1024 | host_suspend(isp); | |
1025 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, | |
1026 | MC1_BDIS_ACON_EN); | |
819d1c74 | 1027 | isp->phy.state = OTG_STATE_B_IDLE; |
f35ae634 TL |
1028 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1029 | l &= ~OTG_CTRL_BITS; | |
1030 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1031 | break; |
1032 | case OTG_STATE_B_IDLE: | |
1033 | break; | |
1034 | } | |
1035 | } | |
1036 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1037 | ||
819d1c74 | 1038 | switch (isp->phy.state) { |
1da177e4 LT |
1039 | case OTG_STATE_B_PERIPHERAL: |
1040 | case OTG_STATE_B_WAIT_ACON: | |
1041 | case OTG_STATE_B_HOST: | |
1042 | if (likely(isp_bstat & OTG_B_SESS_VLD)) | |
1043 | break; | |
1044 | enable_vbus_draw(isp, 0); | |
1045 | #ifndef CONFIG_USB_OTG | |
1046 | /* UDC driver will clear OTG_BSESSVLD */ | |
1047 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1048 | OTG1_DP_PULLDOWN); | |
1049 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1050 | OTG1_DP_PULLUP); | |
08882d20 | 1051 | dump_regs(isp, __func__); |
1da177e4 LT |
1052 | #endif |
1053 | /* FALLTHROUGH */ | |
1054 | case OTG_STATE_B_SRP_INIT: | |
08882d20 | 1055 | b_idle(isp, __func__); |
f35ae634 TL |
1056 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
1057 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1058 | /* FALLTHROUGH */ |
1059 | case OTG_STATE_B_IDLE: | |
819d1c74 | 1060 | if (otg->gadget && (isp_bstat & OTG_B_SESS_VLD)) { |
1da177e4 LT |
1061 | #ifdef CONFIG_USB_OTG |
1062 | update_otg1(isp, isp_stat); | |
1063 | update_otg2(isp, isp_bstat); | |
1064 | #endif | |
1065 | b_peripheral(isp); | |
1066 | } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) | |
1067 | isp_bstat |= OTG_B_SESS_END; | |
1068 | break; | |
1069 | case OTG_STATE_A_WAIT_VFALL: | |
1070 | break; | |
1071 | default: | |
1072 | pr_debug("otg: unsupported b-device %s\n", | |
1073 | state_name(isp)); | |
1074 | break; | |
1075 | } | |
1076 | } | |
1077 | ||
819d1c74 | 1078 | if (state != isp->phy.state) |
1da177e4 | 1079 | pr_debug(" isp, %s -> %s\n", |
3dacdf11 | 1080 | otg_state_string(state), state_name(isp)); |
1da177e4 LT |
1081 | |
1082 | #ifdef CONFIG_USB_OTG | |
1083 | /* update the OTG controller state to match the isp1301; may | |
1084 | * trigger OPRT_CHG irqs for changes going to the isp1301. | |
1085 | */ | |
1086 | update_otg1(isp, isp_stat); | |
1087 | update_otg2(isp, isp_bstat); | |
08882d20 | 1088 | check_state(isp, __func__); |
1da177e4 LT |
1089 | #endif |
1090 | ||
1091 | dump_regs(isp, "isp1301->otg"); | |
1092 | } | |
1093 | ||
1094 | /*-------------------------------------------------------------------------*/ | |
1095 | ||
1096 | static u8 isp1301_clear_latch(struct isp1301 *isp) | |
1097 | { | |
1098 | u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); | |
1099 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); | |
1100 | return latch; | |
1101 | } | |
1102 | ||
1103 | static void | |
25da383d | 1104 | isp1301_work(struct work_struct *work) |
1da177e4 | 1105 | { |
25da383d | 1106 | struct isp1301 *isp = container_of(work, struct isp1301, work); |
1da177e4 LT |
1107 | int stop; |
1108 | ||
1109 | /* implicit lock: we're the only task using this device */ | |
1110 | isp->working = 1; | |
1111 | do { | |
1112 | stop = test_bit(WORK_STOP, &isp->todo); | |
1113 | ||
1114 | #ifdef CONFIG_USB_OTG | |
1115 | /* transfer state from otg engine to isp1301 */ | |
1116 | if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { | |
1117 | otg_update_isp(isp); | |
a5f08a32 | 1118 | put_device(&isp->client->dev); |
1da177e4 LT |
1119 | } |
1120 | #endif | |
1121 | /* transfer state from isp1301 to otg engine */ | |
1122 | if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { | |
1123 | u8 stat = isp1301_clear_latch(isp); | |
1124 | ||
1125 | isp_update_otg(isp, stat); | |
a5f08a32 | 1126 | put_device(&isp->client->dev); |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { | |
1130 | u32 otg_ctrl; | |
1131 | ||
1132 | /* | |
1133 | * skip A_WAIT_VRISE; hc transitions invisibly | |
1134 | * skip A_WAIT_BCON; same. | |
1135 | */ | |
819d1c74 | 1136 | switch (isp->phy.state) { |
1da177e4 LT |
1137 | case OTG_STATE_A_WAIT_BCON: |
1138 | case OTG_STATE_A_WAIT_VRISE: | |
819d1c74 | 1139 | isp->phy.state = OTG_STATE_A_HOST; |
1da177e4 | 1140 | pr_debug(" --> a_host\n"); |
f35ae634 | 1141 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1142 | otg_ctrl |= OTG_A_BUSREQ; |
1143 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
1144 | & OTG_CTRL_MASK; | |
f35ae634 | 1145 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
1146 | break; |
1147 | case OTG_STATE_B_WAIT_ACON: | |
819d1c74 | 1148 | isp->phy.state = OTG_STATE_B_HOST; |
1da177e4 LT |
1149 | pr_debug(" --> b_host (acon)\n"); |
1150 | break; | |
1151 | case OTG_STATE_B_HOST: | |
1152 | case OTG_STATE_B_IDLE: | |
1153 | case OTG_STATE_A_IDLE: | |
1154 | break; | |
1155 | default: | |
1156 | pr_debug(" host resume in %s\n", | |
1157 | state_name(isp)); | |
1158 | } | |
1159 | host_resume(isp); | |
1160 | // mdelay(10); | |
a5f08a32 | 1161 | put_device(&isp->client->dev); |
1da177e4 LT |
1162 | } |
1163 | ||
1164 | if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { | |
1165 | #ifdef VERBOSE | |
1166 | dump_regs(isp, "timer"); | |
1167 | if (!stop) | |
1168 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1169 | #endif | |
a5f08a32 | 1170 | put_device(&isp->client->dev); |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | if (isp->todo) | |
a5f08a32 | 1174 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
1175 | "work done, todo = 0x%lx\n", |
1176 | isp->todo); | |
1177 | if (stop) { | |
a5f08a32 | 1178 | dev_dbg(&isp->client->dev, "stop\n"); |
1da177e4 LT |
1179 | break; |
1180 | } | |
1181 | } while (isp->todo); | |
1182 | isp->working = 0; | |
1183 | } | |
1184 | ||
7d12e780 | 1185 | static irqreturn_t isp1301_irq(int irq, void *isp) |
1da177e4 LT |
1186 | { |
1187 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
1188 | return IRQ_HANDLED; | |
1189 | } | |
1190 | ||
1191 | static void isp1301_timer(unsigned long _isp) | |
1192 | { | |
1193 | isp1301_defer_work((void *)_isp, WORK_TIMER); | |
1194 | } | |
1195 | ||
1196 | /*-------------------------------------------------------------------------*/ | |
1197 | ||
1198 | static void isp1301_release(struct device *dev) | |
1199 | { | |
1200 | struct isp1301 *isp; | |
1201 | ||
a5f08a32 | 1202 | isp = dev_get_drvdata(dev); |
1da177e4 | 1203 | |
d1846b0e DB |
1204 | /* FIXME -- not with a "new style" driver, it doesn't!! */ |
1205 | ||
1da177e4 LT |
1206 | /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ |
1207 | if (isp->i2c_release) | |
1208 | isp->i2c_release(dev); | |
819d1c74 | 1209 | kfree(isp->phy.otg); |
1da177e4 LT |
1210 | kfree (isp); |
1211 | } | |
1212 | ||
1213 | static struct isp1301 *the_transceiver; | |
1214 | ||
9df013b3 | 1215 | static int __exit isp1301_remove(struct i2c_client *i2c) |
1da177e4 LT |
1216 | { |
1217 | struct isp1301 *isp; | |
1218 | ||
a5f08a32 | 1219 | isp = i2c_get_clientdata(i2c); |
1da177e4 LT |
1220 | |
1221 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1222 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
9df013b3 | 1223 | free_irq(i2c->irq, isp); |
1da177e4 LT |
1224 | #ifdef CONFIG_USB_OTG |
1225 | otg_unbind(isp); | |
1226 | #endif | |
1227 | if (machine_is_omap_h2()) | |
d1846b0e | 1228 | gpio_free(2); |
1da177e4 LT |
1229 | |
1230 | isp->timer.data = 0; | |
1231 | set_bit(WORK_STOP, &isp->todo); | |
1232 | del_timer_sync(&isp->timer); | |
43829731 | 1233 | flush_work(&isp->work); |
1da177e4 LT |
1234 | |
1235 | put_device(&i2c->dev); | |
d1846b0e | 1236 | the_transceiver = NULL; |
1da177e4 | 1237 | |
9df013b3 | 1238 | return 0; |
1da177e4 LT |
1239 | } |
1240 | ||
1241 | /*-------------------------------------------------------------------------*/ | |
1242 | ||
1243 | /* NOTE: three modes are possible here, only one of which | |
1244 | * will be standards-conformant on any given system: | |
1245 | * | |
1246 | * - OTG mode (dual-role), required if there's a Mini-AB connector | |
1247 | * - HOST mode, for when there's one or more A (host) connectors | |
1248 | * - DEVICE mode, for when there's a B/Mini-B (device) connector | |
1249 | * | |
1250 | * As a rule, you won't have an isp1301 chip unless it's there to | |
25da383d | 1251 | * support the OTG mode. Other modes help testing USB controllers |
1da177e4 LT |
1252 | * in isolation from (full) OTG support, or maybe so later board |
1253 | * revisions can help to support those feature. | |
1254 | */ | |
1255 | ||
1256 | #ifdef CONFIG_USB_OTG | |
1257 | ||
1258 | static int isp1301_otg_enable(struct isp1301 *isp) | |
1259 | { | |
1260 | power_up(isp); | |
465f8294 | 1261 | isp1301_otg_init(isp); |
1da177e4 LT |
1262 | |
1263 | /* NOTE: since we don't change this, this provides | |
1264 | * a few more interrupts than are strictly needed. | |
1265 | */ | |
1266 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1267 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1268 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1269 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1270 | |
a5f08a32 | 1271 | dev_info(&isp->client->dev, "ready for dual-role USB ...\n"); |
1da177e4 LT |
1272 | |
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | #endif | |
1277 | ||
1278 | /* add or disable the host device+driver */ | |
1279 | static int | |
819d1c74 | 1280 | isp1301_set_host(struct usb_otg *otg, struct usb_bus *host) |
1da177e4 | 1281 | { |
819d1c74 | 1282 | struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy); |
1da177e4 LT |
1283 | |
1284 | if (!otg || isp != the_transceiver) | |
1285 | return -ENODEV; | |
1286 | ||
1287 | if (!host) { | |
f35ae634 | 1288 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 | 1289 | power_down(isp); |
819d1c74 | 1290 | otg->host = NULL; |
1da177e4 LT |
1291 | return 0; |
1292 | } | |
1293 | ||
1294 | #ifdef CONFIG_USB_OTG | |
819d1c74 | 1295 | otg->host = host; |
a5f08a32 | 1296 | dev_dbg(&isp->client->dev, "registered host\n"); |
1da177e4 | 1297 | host_suspend(isp); |
819d1c74 | 1298 | if (otg->gadget) |
1da177e4 LT |
1299 | return isp1301_otg_enable(isp); |
1300 | return 0; | |
1301 | ||
1302 | #elif !defined(CONFIG_USB_GADGET_OMAP) | |
1303 | // FIXME update its refcount | |
819d1c74 | 1304 | otg->host = host; |
1da177e4 LT |
1305 | |
1306 | power_up(isp); | |
1307 | ||
1308 | if (machine_is_omap_h2()) | |
1309 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1310 | ||
a5f08a32 | 1311 | dev_info(&isp->client->dev, "A-Host sessions ok\n"); |
1da177e4 | 1312 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, |
25da383d | 1313 | INTR_ID_GND); |
1da177e4 | 1314 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1315 | INTR_ID_GND); |
1da177e4 LT |
1316 | |
1317 | /* If this has a Mini-AB connector, this mode is highly | |
1318 | * nonstandard ... but can be handy for testing, especially with | |
1319 | * the Mini-A end of an OTG cable. (Or something nonstandard | |
1320 | * like MiniB-to-StandardB, maybe built with a gender mender.) | |
1321 | */ | |
1322 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); | |
1323 | ||
08882d20 | 1324 | dump_regs(isp, __func__); |
1da177e4 LT |
1325 | |
1326 | return 0; | |
1327 | ||
1328 | #else | |
a5f08a32 | 1329 | dev_dbg(&isp->client->dev, "host sessions not allowed\n"); |
1da177e4 LT |
1330 | return -EINVAL; |
1331 | #endif | |
1332 | ||
1333 | } | |
1334 | ||
1335 | static int | |
819d1c74 | 1336 | isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget) |
1da177e4 | 1337 | { |
819d1c74 | 1338 | struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy); |
1da177e4 LT |
1339 | |
1340 | if (!otg || isp != the_transceiver) | |
1341 | return -ENODEV; | |
1342 | ||
1343 | if (!gadget) { | |
f35ae634 | 1344 | omap_writew(0, OTG_IRQ_EN); |
819d1c74 | 1345 | if (!otg->default_a) |
1da177e4 | 1346 | enable_vbus_draw(isp, 0); |
819d1c74 HK |
1347 | usb_gadget_vbus_disconnect(otg->gadget); |
1348 | otg->gadget = NULL; | |
1da177e4 LT |
1349 | power_down(isp); |
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | #ifdef CONFIG_USB_OTG | |
819d1c74 | 1354 | otg->gadget = gadget; |
a5f08a32 | 1355 | dev_dbg(&isp->client->dev, "registered gadget\n"); |
1da177e4 | 1356 | /* gadget driver may be suspended until vbus_connect () */ |
819d1c74 | 1357 | if (otg->host) |
1da177e4 LT |
1358 | return isp1301_otg_enable(isp); |
1359 | return 0; | |
1360 | ||
1361 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) | |
819d1c74 | 1362 | otg->gadget = gadget; |
1da177e4 LT |
1363 | // FIXME update its refcount |
1364 | ||
79d6680f PW |
1365 | { |
1366 | u32 l; | |
1367 | ||
1368 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; | |
1369 | l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS); | |
1370 | l |= OTG_ID; | |
1371 | omap_writel(l, OTG_CTRL); | |
1372 | } | |
f35ae634 | 1373 | |
1da177e4 | 1374 | power_up(isp); |
819d1c74 | 1375 | isp->phy.state = OTG_STATE_B_IDLE; |
1da177e4 | 1376 | |
d1846b0e | 1377 | if (machine_is_omap_h2() || machine_is_omap_h3()) |
1da177e4 LT |
1378 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); |
1379 | ||
1380 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1381 | INTR_SESS_VLD); |
1da177e4 | 1382 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1383 | INTR_VBUS_VLD); |
a5f08a32 | 1384 | dev_info(&isp->client->dev, "B-Peripheral sessions ok\n"); |
08882d20 | 1385 | dump_regs(isp, __func__); |
1da177e4 LT |
1386 | |
1387 | /* If this has a Mini-AB connector, this mode is highly | |
1388 | * nonstandard ... but can be handy for testing, so long | |
1389 | * as you don't plug a Mini-A cable into the jack. | |
1390 | */ | |
1391 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) | |
1392 | b_peripheral(isp); | |
1393 | ||
1394 | return 0; | |
1395 | ||
1396 | #else | |
a5f08a32 | 1397 | dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n"); |
1da177e4 LT |
1398 | return -EINVAL; |
1399 | #endif | |
1400 | } | |
1401 | ||
1402 | ||
1403 | /*-------------------------------------------------------------------------*/ | |
1404 | ||
1405 | static int | |
86753811 | 1406 | isp1301_set_power(struct usb_phy *dev, unsigned mA) |
1da177e4 LT |
1407 | { |
1408 | if (!the_transceiver) | |
1409 | return -ENODEV; | |
1410 | if (dev->state == OTG_STATE_B_PERIPHERAL) | |
1411 | enable_vbus_draw(the_transceiver, mA); | |
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | static int | |
819d1c74 | 1416 | isp1301_start_srp(struct usb_otg *otg) |
1da177e4 | 1417 | { |
819d1c74 | 1418 | struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy); |
1da177e4 LT |
1419 | u32 otg_ctrl; |
1420 | ||
819d1c74 HK |
1421 | if (!otg || isp != the_transceiver |
1422 | || isp->phy.state != OTG_STATE_B_IDLE) | |
1da177e4 LT |
1423 | return -ENODEV; |
1424 | ||
f35ae634 | 1425 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1426 | if (!(otg_ctrl & OTG_BSESSEND)) |
1427 | return -EINVAL; | |
1428 | ||
1429 | otg_ctrl |= OTG_B_BUSREQ; | |
1430 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; | |
f35ae634 | 1431 | omap_writel(otg_ctrl, OTG_CTRL); |
819d1c74 | 1432 | isp->phy.state = OTG_STATE_B_SRP_INIT; |
1da177e4 | 1433 | |
f35ae634 TL |
1434 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), |
1435 | omap_readl(OTG_CTRL)); | |
1da177e4 | 1436 | #ifdef CONFIG_USB_OTG |
08882d20 | 1437 | check_state(isp, __func__); |
1da177e4 LT |
1438 | #endif |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | static int | |
819d1c74 | 1443 | isp1301_start_hnp(struct usb_otg *otg) |
1da177e4 LT |
1444 | { |
1445 | #ifdef CONFIG_USB_OTG | |
819d1c74 | 1446 | struct isp1301 *isp = container_of(otg->phy, struct isp1301, phy); |
f35ae634 | 1447 | u32 l; |
1da177e4 | 1448 | |
819d1c74 | 1449 | if (!otg || isp != the_transceiver) |
1da177e4 | 1450 | return -ENODEV; |
819d1c74 | 1451 | if (otg->default_a && (otg->host == NULL || !otg->host->b_hnp_enable)) |
1da177e4 | 1452 | return -ENOTCONN; |
819d1c74 HK |
1453 | if (!otg->default_a && (otg->gadget == NULL |
1454 | || !otg->gadget->b_hnp_enable)) | |
1da177e4 LT |
1455 | return -ENOTCONN; |
1456 | ||
1457 | /* We want hardware to manage most HNP protocol timings. | |
1458 | * So do this part as early as possible... | |
1459 | */ | |
819d1c74 | 1460 | switch (isp->phy.state) { |
1da177e4 | 1461 | case OTG_STATE_B_HOST: |
819d1c74 | 1462 | isp->phy.state = OTG_STATE_B_PERIPHERAL; |
1da177e4 LT |
1463 | /* caller will suspend next */ |
1464 | break; | |
1465 | case OTG_STATE_A_HOST: | |
1466 | #if 0 | |
1467 | /* autoconnect mode avoids irq latency bugs */ | |
1468 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1469 | MC1_BDIS_ACON_EN); | |
1470 | #endif | |
1471 | /* caller must suspend then clear A_BUSREQ */ | |
819d1c74 | 1472 | usb_gadget_vbus_connect(otg->gadget); |
f35ae634 TL |
1473 | l = omap_readl(OTG_CTRL); |
1474 | l |= OTG_A_SETB_HNPEN; | |
1475 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1476 | |
1477 | break; | |
1478 | case OTG_STATE_A_PERIPHERAL: | |
1479 | /* initiated by B-Host suspend */ | |
1480 | break; | |
1481 | default: | |
1482 | return -EILSEQ; | |
1483 | } | |
1484 | pr_debug("otg: HNP %s, %06x ...\n", | |
f35ae634 | 1485 | state_name(isp), omap_readl(OTG_CTRL)); |
08882d20 | 1486 | check_state(isp, __func__); |
1da177e4 LT |
1487 | return 0; |
1488 | #else | |
1489 | /* srp-only */ | |
1490 | return -EINVAL; | |
1491 | #endif | |
1492 | } | |
1493 | ||
1494 | /*-------------------------------------------------------------------------*/ | |
1495 | ||
41ac7b3a | 1496 | static int |
d1846b0e | 1497 | isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id) |
1da177e4 LT |
1498 | { |
1499 | int status; | |
1500 | struct isp1301 *isp; | |
1da177e4 LT |
1501 | |
1502 | if (the_transceiver) | |
1503 | return 0; | |
1504 | ||
82ca76b6 | 1505 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
1da177e4 LT |
1506 | if (!isp) |
1507 | return 0; | |
1508 | ||
819d1c74 HK |
1509 | isp->phy.otg = kzalloc(sizeof *isp->phy.otg, GFP_KERNEL); |
1510 | if (!isp->phy.otg) { | |
1511 | kfree(isp); | |
1512 | return 0; | |
1513 | } | |
1514 | ||
25da383d | 1515 | INIT_WORK(&isp->work, isp1301_work); |
1da177e4 LT |
1516 | init_timer(&isp->timer); |
1517 | isp->timer.function = isp1301_timer; | |
1518 | isp->timer.data = (unsigned long) isp; | |
1519 | ||
9df013b3 JD |
1520 | i2c_set_clientdata(i2c, isp); |
1521 | isp->client = i2c; | |
1da177e4 | 1522 | |
25985edc | 1523 | /* verify the chip (shouldn't be necessary) */ |
9df013b3 JD |
1524 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); |
1525 | if (status != I2C_VENDOR_ID_PHILIPS) { | |
1526 | dev_dbg(&i2c->dev, "not philips id: %d\n", status); | |
1527 | goto fail; | |
1528 | } | |
1529 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); | |
1530 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { | |
1531 | dev_dbg(&i2c->dev, "not isp1301, %d\n", status); | |
1532 | goto fail; | |
1da177e4 LT |
1533 | } |
1534 | isp->i2c_release = i2c->dev.release; | |
1535 | i2c->dev.release = isp1301_release; | |
1536 | ||
1537 | /* initial development used chiprev 2.00 */ | |
1538 | status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); | |
1539 | dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", | |
1540 | status >> 8, status & 0xff); | |
1541 | ||
1542 | /* make like power-on reset */ | |
1543 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); | |
1544 | ||
1545 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); | |
1546 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); | |
1547 | ||
1548 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1549 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); | |
1550 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1551 | ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
1552 | ||
1553 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); | |
1554 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1555 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1556 | ||
1557 | #ifdef CONFIG_USB_OTG | |
1558 | status = otg_bind(isp); | |
1559 | if (status < 0) { | |
1560 | dev_dbg(&i2c->dev, "can't bind OTG\n"); | |
9df013b3 | 1561 | goto fail; |
1da177e4 LT |
1562 | } |
1563 | #endif | |
1564 | ||
1565 | if (machine_is_omap_h2()) { | |
1566 | /* full speed signaling by default */ | |
1567 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
cbbcb9b0 | 1568 | MC1_SPEED); |
1da177e4 LT |
1569 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, |
1570 | MC2_SPD_SUSP_CTRL); | |
1571 | ||
1572 | /* IRQ wired at M14 */ | |
1573 | omap_cfg_reg(M14_1510_GPIO2); | |
25da383d DB |
1574 | if (gpio_request(2, "isp1301") == 0) |
1575 | gpio_direction_input(2); | |
1576 | isp->irq_type = IRQF_TRIGGER_FALLING; | |
1da177e4 LT |
1577 | } |
1578 | ||
9df013b3 | 1579 | status = request_irq(i2c->irq, isp1301_irq, |
25da383d | 1580 | isp->irq_type, DRIVER_NAME, isp); |
1da177e4 LT |
1581 | if (status < 0) { |
1582 | dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", | |
9df013b3 JD |
1583 | i2c->irq, status); |
1584 | goto fail; | |
1da177e4 LT |
1585 | } |
1586 | ||
819d1c74 HK |
1587 | isp->phy.dev = &i2c->dev; |
1588 | isp->phy.label = DRIVER_NAME; | |
1589 | isp->phy.set_power = isp1301_set_power, | |
1da177e4 | 1590 | |
819d1c74 HK |
1591 | isp->phy.otg->phy = &isp->phy; |
1592 | isp->phy.otg->set_host = isp1301_set_host, | |
1593 | isp->phy.otg->set_peripheral = isp1301_set_peripheral, | |
1594 | isp->phy.otg->start_srp = isp1301_start_srp, | |
1595 | isp->phy.otg->start_hnp = isp1301_start_hnp, | |
1da177e4 LT |
1596 | |
1597 | enable_vbus_draw(isp, 0); | |
1598 | power_down(isp); | |
1599 | the_transceiver = isp; | |
1600 | ||
1601 | #ifdef CONFIG_USB_OTG | |
1602 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
1603 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
1604 | #endif | |
1605 | ||
08882d20 | 1606 | dump_regs(isp, __func__); |
1da177e4 LT |
1607 | |
1608 | #ifdef VERBOSE | |
1609 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1610 | dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); | |
1611 | #endif | |
1612 | ||
662dca54 | 1613 | status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2); |
1da177e4 LT |
1614 | if (status < 0) |
1615 | dev_err(&i2c->dev, "can't register transceiver, %d\n", | |
1616 | status); | |
1617 | ||
1618 | return 0; | |
1da177e4 | 1619 | |
9df013b3 | 1620 | fail: |
819d1c74 | 1621 | kfree(isp->phy.otg); |
9df013b3 JD |
1622 | kfree(isp); |
1623 | return -ENODEV; | |
1da177e4 LT |
1624 | } |
1625 | ||
9df013b3 JD |
1626 | static const struct i2c_device_id isp1301_id[] = { |
1627 | { "isp1301_omap", 0 }, | |
1628 | { } | |
1629 | }; | |
1630 | MODULE_DEVICE_TABLE(i2c, isp1301_id); | |
1631 | ||
1da177e4 | 1632 | static struct i2c_driver isp1301_driver = { |
a9718b0c | 1633 | .driver = { |
a9718b0c LR |
1634 | .name = "isp1301_omap", |
1635 | }, | |
9df013b3 JD |
1636 | .probe = isp1301_probe, |
1637 | .remove = __exit_p(isp1301_remove), | |
1638 | .id_table = isp1301_id, | |
1da177e4 LT |
1639 | }; |
1640 | ||
1641 | /*-------------------------------------------------------------------------*/ | |
1642 | ||
1643 | static int __init isp_init(void) | |
1644 | { | |
1645 | return i2c_add_driver(&isp1301_driver); | |
1646 | } | |
94a82487 | 1647 | subsys_initcall(isp_init); |
1da177e4 LT |
1648 | |
1649 | static void __exit isp_exit(void) | |
1650 | { | |
1651 | if (the_transceiver) | |
662dca54 | 1652 | usb_remove_phy(&the_transceiver->phy); |
1da177e4 LT |
1653 | i2c_del_driver(&isp1301_driver); |
1654 | } | |
1655 | module_exit(isp_exit); | |
1656 |