Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller | |
3 | * | |
4 | * Copyright (C) 2004 Texas Instruments | |
5 | * Copyright (C) 2004 David Brownell | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
1da177e4 | 21 | |
1da177e4 LT |
22 | #include <linux/kernel.h> |
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/interrupt.h> | |
d052d1be | 27 | #include <linux/platform_device.h> |
d1846b0e | 28 | #include <linux/gpio.h> |
5f848137 | 29 | #include <linux/usb/ch9.h> |
187426e6 | 30 | #include <linux/usb/gadget.h> |
1da177e4 | 31 | #include <linux/usb.h> |
3a16f7b4 | 32 | #include <linux/usb/otg.h> |
1da177e4 LT |
33 | #include <linux/i2c.h> |
34 | #include <linux/workqueue.h> | |
35 | ||
36 | #include <asm/irq.h> | |
d1846b0e DB |
37 | #include <asm/mach-types.h> |
38 | ||
70c494c3 | 39 | #include <mach/mux.h> |
1da177e4 | 40 | |
b924b204 | 41 | #include <mach/usb.h> |
1da177e4 | 42 | |
523e531e | 43 | #undef VERBOSE |
1da177e4 LT |
44 | |
45 | ||
46 | #define DRIVER_VERSION "24 August 2004" | |
25da383d | 47 | #define DRIVER_NAME (isp1301_driver.driver.name) |
1da177e4 LT |
48 | |
49 | MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
52 | struct isp1301 { | |
819d1c74 | 53 | struct usb_phy phy; |
a5f08a32 | 54 | struct i2c_client *client; |
1da177e4 LT |
55 | void (*i2c_release)(struct device *dev); |
56 | ||
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 | ||
1da177e4 LT |
93 | /* board-specific PM hooks */ |
94 | ||
d1846b0e | 95 | #if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3) |
1da177e4 | 96 | |
197d0bdf | 97 | #if defined(CONFIG_TPS65010) || (defined(CONFIG_TPS65010_MODULE) && defined(MODULE)) |
1da177e4 | 98 | |
6d16bfb5 | 99 | #include <linux/i2c/tps65010.h> |
1da177e4 LT |
100 | |
101 | #else | |
102 | ||
103 | static inline int tps65010_set_vbus_draw(unsigned mA) | |
104 | { | |
105 | pr_debug("tps65010: draw %d mA (STUB)\n", mA); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | #endif | |
110 | ||
111 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
112 | { | |
113 | int status = tps65010_set_vbus_draw(mA); | |
114 | if (status < 0) | |
115 | pr_debug(" VBUS %d mA error %d\n", mA, status); | |
116 | } | |
117 | ||
d77282c8 | 118 | #else |
d1846b0e DB |
119 | |
120 | static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) | |
121 | { | |
122 | /* H4 controls this by DIP switch S2.4; no soft control. | |
123 | * ON means the charger is always enabled. Leave it OFF | |
124 | * unless the OTG port is used only in B-peripheral mode. | |
125 | */ | |
126 | } | |
127 | ||
d77282c8 AG |
128 | #endif |
129 | ||
d1846b0e DB |
130 | static void enable_vbus_source(struct isp1301 *isp) |
131 | { | |
132 | /* this board won't supply more than 8mA vbus power. | |
133 | * some boards can switch a 100ma "unit load" (or more). | |
134 | */ | |
135 | } | |
136 | ||
137 | ||
138 | /* products will deliver OTG messages with LEDs, GUI, etc */ | |
139 | static inline void notresponding(struct isp1301 *isp) | |
140 | { | |
141 | printk(KERN_NOTICE "OTG device not responding.\n"); | |
142 | } | |
143 | ||
144 | ||
1da177e4 LT |
145 | /*-------------------------------------------------------------------------*/ |
146 | ||
1da177e4 LT |
147 | static struct i2c_driver isp1301_driver; |
148 | ||
149 | /* smbus apis are used for portability */ | |
150 | ||
151 | static inline u8 | |
152 | isp1301_get_u8(struct isp1301 *isp, u8 reg) | |
153 | { | |
a5f08a32 | 154 | return i2c_smbus_read_byte_data(isp->client, reg + 0); |
1da177e4 LT |
155 | } |
156 | ||
157 | static inline int | |
158 | isp1301_get_u16(struct isp1301 *isp, u8 reg) | |
159 | { | |
a5f08a32 | 160 | return i2c_smbus_read_word_data(isp->client, reg); |
1da177e4 LT |
161 | } |
162 | ||
163 | static inline int | |
164 | isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
165 | { | |
a5f08a32 | 166 | return i2c_smbus_write_byte_data(isp->client, reg + 0, bits); |
1da177e4 LT |
167 | } |
168 | ||
169 | static inline int | |
170 | isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) | |
171 | { | |
a5f08a32 | 172 | return i2c_smbus_write_byte_data(isp->client, reg + 1, bits); |
1da177e4 LT |
173 | } |
174 | ||
175 | /*-------------------------------------------------------------------------*/ | |
176 | ||
177 | /* identification */ | |
178 | #define ISP1301_VENDOR_ID 0x00 /* u16 read */ | |
179 | #define ISP1301_PRODUCT_ID 0x02 /* u16 read */ | |
180 | #define ISP1301_BCD_DEVICE 0x14 /* u16 read */ | |
181 | ||
182 | #define I2C_VENDOR_ID_PHILIPS 0x04cc | |
183 | #define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 | |
184 | ||
185 | /* operational registers */ | |
186 | #define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ | |
f35ae634 TL |
187 | # define MC1_SPEED (1 << 0) |
188 | # define MC1_SUSPEND (1 << 1) | |
1da177e4 LT |
189 | # define MC1_DAT_SE0 (1 << 2) |
190 | # define MC1_TRANSPARENT (1 << 3) | |
191 | # define MC1_BDIS_ACON_EN (1 << 4) | |
192 | # define MC1_OE_INT_EN (1 << 5) | |
193 | # define MC1_UART_EN (1 << 6) | |
194 | # define MC1_MASK 0x7f | |
195 | #define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ | |
196 | # define MC2_GLOBAL_PWR_DN (1 << 0) | |
197 | # define MC2_SPD_SUSP_CTRL (1 << 1) | |
198 | # define MC2_BI_DI (1 << 2) | |
199 | # define MC2_TRANSP_BDIR0 (1 << 3) | |
200 | # define MC2_TRANSP_BDIR1 (1 << 4) | |
201 | # define MC2_AUDIO_EN (1 << 5) | |
202 | # define MC2_PSW_EN (1 << 6) | |
203 | # define MC2_EN2V7 (1 << 7) | |
204 | #define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ | |
205 | # define OTG1_DP_PULLUP (1 << 0) | |
206 | # define OTG1_DM_PULLUP (1 << 1) | |
207 | # define OTG1_DP_PULLDOWN (1 << 2) | |
208 | # define OTG1_DM_PULLDOWN (1 << 3) | |
209 | # define OTG1_ID_PULLDOWN (1 << 4) | |
210 | # define OTG1_VBUS_DRV (1 << 5) | |
211 | # define OTG1_VBUS_DISCHRG (1 << 6) | |
212 | # define OTG1_VBUS_CHRG (1 << 7) | |
213 | #define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ | |
214 | # define OTG_B_SESS_END (1 << 6) | |
215 | # define OTG_B_SESS_VLD (1 << 7) | |
216 | ||
217 | #define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ | |
218 | #define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ | |
219 | ||
220 | #define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ | |
221 | #define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ | |
222 | ||
223 | /* same bitfields in all interrupt registers */ | |
224 | # define INTR_VBUS_VLD (1 << 0) | |
225 | # define INTR_SESS_VLD (1 << 1) | |
226 | # define INTR_DP_HI (1 << 2) | |
227 | # define INTR_ID_GND (1 << 3) | |
228 | # define INTR_DM_HI (1 << 4) | |
229 | # define INTR_ID_FLOAT (1 << 5) | |
230 | # define INTR_BDIS_ACON (1 << 6) | |
231 | # define INTR_CR_INT (1 << 7) | |
232 | ||
233 | /*-------------------------------------------------------------------------*/ | |
234 | ||
1da177e4 LT |
235 | static inline const char *state_name(struct isp1301 *isp) |
236 | { | |
e47d9254 | 237 | return usb_otg_state_string(isp->phy.otg->state); |
1da177e4 LT |
238 | } |
239 | ||
1da177e4 LT |
240 | /*-------------------------------------------------------------------------*/ |
241 | ||
242 | /* NOTE: some of this ISP1301 setup is specific to H2 boards; | |
243 | * not everything is guarded by board-specific checks, or even using | |
244 | * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. | |
245 | * | |
246 | * ALSO: this currently doesn't use ISP1301 low-power modes | |
247 | * while OTG is running. | |
248 | */ | |
249 | ||
250 | static void power_down(struct isp1301 *isp) | |
251 | { | |
e47d9254 | 252 | isp->phy.otg->state = OTG_STATE_UNDEFINED; |
1da177e4 LT |
253 | |
254 | // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 255 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
1da177e4 LT |
256 | |
257 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); | |
258 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
259 | } | |
260 | ||
5b35becc | 261 | static void __maybe_unused power_up(struct isp1301 *isp) |
1da177e4 LT |
262 | { |
263 | // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); | |
f35ae634 | 264 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); |
25da383d | 265 | |
1da177e4 LT |
266 | /* do this only when cpu is driving transceiver, |
267 | * so host won't see a low speed device... | |
268 | */ | |
269 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
270 | } | |
271 | ||
272 | #define NO_HOST_SUSPEND | |
273 | ||
274 | static int host_suspend(struct isp1301 *isp) | |
275 | { | |
276 | #ifdef NO_HOST_SUSPEND | |
277 | return 0; | |
278 | #else | |
279 | struct device *dev; | |
280 | ||
819d1c74 | 281 | if (!isp->phy.otg->host) |
1da177e4 LT |
282 | return -ENODEV; |
283 | ||
284 | /* Currently ASSUMES only the OTG port matters; | |
285 | * other ports could be active... | |
286 | */ | |
819d1c74 | 287 | dev = isp->phy.otg->host->controller; |
1da177e4 LT |
288 | return dev->driver->suspend(dev, 3, 0); |
289 | #endif | |
290 | } | |
291 | ||
292 | static int host_resume(struct isp1301 *isp) | |
293 | { | |
294 | #ifdef NO_HOST_SUSPEND | |
295 | return 0; | |
296 | #else | |
297 | struct device *dev; | |
298 | ||
819d1c74 | 299 | if (!isp->phy.otg->host) |
1da177e4 LT |
300 | return -ENODEV; |
301 | ||
819d1c74 | 302 | dev = isp->phy.otg->host->controller; |
1da177e4 LT |
303 | return dev->driver->resume(dev, 0); |
304 | #endif | |
305 | } | |
306 | ||
307 | static int gadget_suspend(struct isp1301 *isp) | |
308 | { | |
819d1c74 HK |
309 | isp->phy.otg->gadget->b_hnp_enable = 0; |
310 | isp->phy.otg->gadget->a_hnp_support = 0; | |
311 | isp->phy.otg->gadget->a_alt_hnp_support = 0; | |
312 | return usb_gadget_vbus_disconnect(isp->phy.otg->gadget); | |
1da177e4 LT |
313 | } |
314 | ||
315 | /*-------------------------------------------------------------------------*/ | |
316 | ||
317 | #define TIMER_MINUTES 10 | |
318 | #define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) | |
319 | ||
320 | /* Almost all our I2C messaging comes from a work queue's task context. | |
321 | * NOTE: guaranteeing certain response times might mean we shouldn't | |
322 | * share keventd's work queue; a realtime task might be safest. | |
323 | */ | |
d1846b0e | 324 | static void isp1301_defer_work(struct isp1301 *isp, int work) |
1da177e4 LT |
325 | { |
326 | int status; | |
327 | ||
328 | if (isp && !test_and_set_bit(work, &isp->todo)) { | |
a5f08a32 | 329 | (void) get_device(&isp->client->dev); |
1da177e4 LT |
330 | status = schedule_work(&isp->work); |
331 | if (!status && !isp->working) | |
a5f08a32 | 332 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
333 | "work item %d may be lost\n", work); |
334 | } | |
335 | } | |
336 | ||
337 | /* called from irq handlers */ | |
338 | static void a_idle(struct isp1301 *isp, const char *tag) | |
339 | { | |
f35ae634 TL |
340 | u32 l; |
341 | ||
e47d9254 | 342 | if (isp->phy.otg->state == OTG_STATE_A_IDLE) |
1da177e4 LT |
343 | return; |
344 | ||
819d1c74 HK |
345 | isp->phy.otg->default_a = 1; |
346 | if (isp->phy.otg->host) { | |
347 | isp->phy.otg->host->is_b_host = 0; | |
1da177e4 LT |
348 | host_suspend(isp); |
349 | } | |
819d1c74 HK |
350 | if (isp->phy.otg->gadget) { |
351 | isp->phy.otg->gadget->is_a_peripheral = 1; | |
1da177e4 LT |
352 | gadget_suspend(isp); |
353 | } | |
e47d9254 | 354 | isp->phy.otg->state = OTG_STATE_A_IDLE; |
f35ae634 TL |
355 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
356 | omap_writel(l, OTG_CTRL); | |
357 | isp->last_otg_ctrl = l; | |
1da177e4 LT |
358 | pr_debug(" --> %s/%s\n", state_name(isp), tag); |
359 | } | |
360 | ||
361 | /* called from irq handlers */ | |
362 | static void b_idle(struct isp1301 *isp, const char *tag) | |
363 | { | |
f35ae634 TL |
364 | u32 l; |
365 | ||
e47d9254 | 366 | if (isp->phy.otg->state == OTG_STATE_B_IDLE) |
1da177e4 LT |
367 | return; |
368 | ||
819d1c74 HK |
369 | isp->phy.otg->default_a = 0; |
370 | if (isp->phy.otg->host) { | |
371 | isp->phy.otg->host->is_b_host = 1; | |
1da177e4 LT |
372 | host_suspend(isp); |
373 | } | |
819d1c74 HK |
374 | if (isp->phy.otg->gadget) { |
375 | isp->phy.otg->gadget->is_a_peripheral = 0; | |
1da177e4 LT |
376 | gadget_suspend(isp); |
377 | } | |
e47d9254 | 378 | isp->phy.otg->state = OTG_STATE_B_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 | static void | |
386 | dump_regs(struct isp1301 *isp, const char *label) | |
387 | { | |
1da177e4 LT |
388 | u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); |
389 | u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
390 | u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
391 | ||
392 | pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", | |
f35ae634 | 393 | omap_readl(OTG_CTRL), label, state_name(isp), |
1da177e4 LT |
394 | ctrl, status, src); |
395 | /* mode control and irq enables don't change much */ | |
1da177e4 LT |
396 | } |
397 | ||
398 | /*-------------------------------------------------------------------------*/ | |
399 | ||
400 | #ifdef CONFIG_USB_OTG | |
401 | ||
402 | /* | |
403 | * The OMAP OTG controller handles most of the OTG state transitions. | |
404 | * | |
405 | * We translate isp1301 outputs (mostly voltage comparator status) into | |
406 | * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state | |
407 | * flags into isp1301 inputs ... and infer state transitions. | |
408 | */ | |
409 | ||
410 | #ifdef VERBOSE | |
411 | ||
412 | static void check_state(struct isp1301 *isp, const char *tag) | |
413 | { | |
414 | enum usb_otg_state state = OTG_STATE_UNDEFINED; | |
f35ae634 | 415 | u8 fsm = omap_readw(OTG_TEST) & 0x0ff; |
1da177e4 LT |
416 | unsigned extra = 0; |
417 | ||
418 | switch (fsm) { | |
419 | ||
420 | /* default-b */ | |
421 | case 0x0: | |
422 | state = OTG_STATE_B_IDLE; | |
423 | break; | |
424 | case 0x3: | |
425 | case 0x7: | |
426 | extra = 1; | |
427 | case 0x1: | |
428 | state = OTG_STATE_B_PERIPHERAL; | |
429 | break; | |
430 | case 0x11: | |
431 | state = OTG_STATE_B_SRP_INIT; | |
432 | break; | |
433 | ||
434 | /* extra dual-role default-b states */ | |
435 | case 0x12: | |
436 | case 0x13: | |
437 | case 0x16: | |
438 | extra = 1; | |
439 | case 0x17: | |
440 | state = OTG_STATE_B_WAIT_ACON; | |
441 | break; | |
442 | case 0x34: | |
443 | state = OTG_STATE_B_HOST; | |
444 | break; | |
445 | ||
446 | /* default-a */ | |
447 | case 0x36: | |
448 | state = OTG_STATE_A_IDLE; | |
449 | break; | |
450 | case 0x3c: | |
451 | state = OTG_STATE_A_WAIT_VFALL; | |
452 | break; | |
453 | case 0x7d: | |
454 | state = OTG_STATE_A_VBUS_ERR; | |
455 | break; | |
456 | case 0x9e: | |
457 | case 0x9f: | |
458 | extra = 1; | |
459 | case 0x89: | |
460 | state = OTG_STATE_A_PERIPHERAL; | |
461 | break; | |
462 | case 0xb7: | |
463 | state = OTG_STATE_A_WAIT_VRISE; | |
464 | break; | |
465 | case 0xb8: | |
466 | state = OTG_STATE_A_WAIT_BCON; | |
467 | break; | |
468 | case 0xb9: | |
469 | state = OTG_STATE_A_HOST; | |
470 | break; | |
471 | case 0xba: | |
472 | state = OTG_STATE_A_SUSPEND; | |
473 | break; | |
474 | default: | |
475 | break; | |
476 | } | |
e47d9254 | 477 | if (isp->phy.otg->state == state && !extra) |
1da177e4 LT |
478 | return; |
479 | pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, | |
42c0bf1c | 480 | usb_otg_state_string(state), fsm, state_name(isp), |
f35ae634 | 481 | omap_readl(OTG_CTRL)); |
1da177e4 LT |
482 | } |
483 | ||
484 | #else | |
485 | ||
486 | static inline void check_state(struct isp1301 *isp, const char *tag) { } | |
487 | ||
488 | #endif | |
489 | ||
490 | /* outputs from ISP1301_INTERRUPT_SOURCE */ | |
491 | static void update_otg1(struct isp1301 *isp, u8 int_src) | |
492 | { | |
493 | u32 otg_ctrl; | |
494 | ||
f35ae634 TL |
495 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
496 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
497 | otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); | |
498 | ||
1da177e4 LT |
499 | if (int_src & INTR_SESS_VLD) |
500 | otg_ctrl |= OTG_ASESSVLD; | |
e47d9254 | 501 | else if (isp->phy.otg->state == OTG_STATE_A_WAIT_VFALL) { |
1da177e4 LT |
502 | a_idle(isp, "vfall"); |
503 | otg_ctrl &= ~OTG_CTRL_BITS; | |
504 | } | |
505 | if (int_src & INTR_VBUS_VLD) | |
506 | otg_ctrl |= OTG_VBUSVLD; | |
507 | if (int_src & INTR_ID_GND) { /* default-A */ | |
e47d9254 AT |
508 | if (isp->phy.otg->state == OTG_STATE_B_IDLE |
509 | || isp->phy.otg->state | |
819d1c74 | 510 | == OTG_STATE_UNDEFINED) { |
1da177e4 LT |
511 | a_idle(isp, "init"); |
512 | return; | |
513 | } | |
514 | } else { /* default-B */ | |
515 | otg_ctrl |= OTG_ID; | |
e47d9254 AT |
516 | if (isp->phy.otg->state == OTG_STATE_A_IDLE |
517 | || isp->phy.otg->state == OTG_STATE_UNDEFINED) { | |
1da177e4 LT |
518 | b_idle(isp, "init"); |
519 | return; | |
520 | } | |
521 | } | |
f35ae634 | 522 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
523 | } |
524 | ||
525 | /* outputs from ISP1301_OTG_STATUS */ | |
526 | static void update_otg2(struct isp1301 *isp, u8 otg_status) | |
527 | { | |
528 | u32 otg_ctrl; | |
529 | ||
f35ae634 TL |
530 | otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
531 | otg_ctrl &= ~OTG_XCEIV_INPUTS; | |
532 | otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND); | |
1da177e4 LT |
533 | if (otg_status & OTG_B_SESS_VLD) |
534 | otg_ctrl |= OTG_BSESSVLD; | |
535 | else if (otg_status & OTG_B_SESS_END) | |
536 | otg_ctrl |= OTG_BSESSEND; | |
f35ae634 | 537 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
538 | } |
539 | ||
540 | /* inputs going to ISP1301 */ | |
541 | static void otg_update_isp(struct isp1301 *isp) | |
542 | { | |
543 | u32 otg_ctrl, otg_change; | |
544 | u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; | |
545 | ||
f35ae634 | 546 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
547 | otg_change = otg_ctrl ^ isp->last_otg_ctrl; |
548 | isp->last_otg_ctrl = otg_ctrl; | |
549 | otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; | |
550 | ||
e47d9254 | 551 | switch (isp->phy.otg->state) { |
1da177e4 LT |
552 | case OTG_STATE_B_IDLE: |
553 | case OTG_STATE_B_PERIPHERAL: | |
554 | case OTG_STATE_B_SRP_INIT: | |
555 | if (!(otg_ctrl & OTG_PULLUP)) { | |
556 | // if (otg_ctrl & OTG_B_HNPEN) { | |
819d1c74 | 557 | if (isp->phy.otg->gadget->b_hnp_enable) { |
e47d9254 | 558 | isp->phy.otg->state = OTG_STATE_B_WAIT_ACON; |
1da177e4 LT |
559 | pr_debug(" --> b_wait_acon\n"); |
560 | } | |
561 | goto pulldown; | |
562 | } | |
563 | pullup: | |
564 | set |= OTG1_DP_PULLUP; | |
565 | clr |= OTG1_DP_PULLDOWN; | |
566 | break; | |
567 | case OTG_STATE_A_SUSPEND: | |
568 | case OTG_STATE_A_PERIPHERAL: | |
569 | if (otg_ctrl & OTG_PULLUP) | |
570 | goto pullup; | |
571 | /* FALLTHROUGH */ | |
572 | // case OTG_STATE_B_WAIT_ACON: | |
573 | default: | |
574 | pulldown: | |
575 | set |= OTG1_DP_PULLDOWN; | |
576 | clr |= OTG1_DP_PULLUP; | |
577 | break; | |
578 | } | |
579 | ||
580 | # define toggle(OTG,ISP) do { \ | |
581 | if (otg_ctrl & OTG) set |= ISP; \ | |
582 | else clr |= ISP; \ | |
583 | } while (0) | |
584 | ||
819d1c74 | 585 | if (!(isp->phy.otg->host)) |
1da177e4 LT |
586 | otg_ctrl &= ~OTG_DRV_VBUS; |
587 | ||
e47d9254 | 588 | switch (isp->phy.otg->state) { |
1da177e4 LT |
589 | case OTG_STATE_A_SUSPEND: |
590 | if (otg_ctrl & OTG_DRV_VBUS) { | |
591 | set |= OTG1_VBUS_DRV; | |
592 | break; | |
593 | } | |
594 | /* HNP failed for some reason (A_AIDL_BDIS timeout) */ | |
595 | notresponding(isp); | |
596 | ||
597 | /* FALLTHROUGH */ | |
598 | case OTG_STATE_A_VBUS_ERR: | |
e47d9254 | 599 | isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL; |
1da177e4 LT |
600 | pr_debug(" --> a_wait_vfall\n"); |
601 | /* FALLTHROUGH */ | |
602 | case OTG_STATE_A_WAIT_VFALL: | |
603 | /* FIXME usbcore thinks port power is still on ... */ | |
604 | clr |= OTG1_VBUS_DRV; | |
605 | break; | |
606 | case OTG_STATE_A_IDLE: | |
607 | if (otg_ctrl & OTG_DRV_VBUS) { | |
e47d9254 | 608 | isp->phy.otg->state = OTG_STATE_A_WAIT_VRISE; |
1da177e4 LT |
609 | pr_debug(" --> a_wait_vrise\n"); |
610 | } | |
611 | /* FALLTHROUGH */ | |
612 | default: | |
613 | toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); | |
614 | } | |
615 | ||
616 | toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); | |
617 | toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); | |
618 | ||
619 | # undef toggle | |
620 | ||
621 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); | |
622 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); | |
623 | ||
624 | /* HNP switch to host or peripheral; and SRP */ | |
625 | if (otg_change & OTG_PULLUP) { | |
f35ae634 TL |
626 | u32 l; |
627 | ||
e47d9254 | 628 | switch (isp->phy.otg->state) { |
1da177e4 LT |
629 | case OTG_STATE_B_IDLE: |
630 | if (clr & OTG1_DP_PULLUP) | |
631 | break; | |
e47d9254 | 632 | isp->phy.otg->state = OTG_STATE_B_PERIPHERAL; |
1da177e4 LT |
633 | pr_debug(" --> b_peripheral\n"); |
634 | break; | |
635 | case OTG_STATE_A_SUSPEND: | |
636 | if (clr & OTG1_DP_PULLUP) | |
637 | break; | |
e47d9254 | 638 | isp->phy.otg->state = OTG_STATE_A_PERIPHERAL; |
1da177e4 LT |
639 | pr_debug(" --> a_peripheral\n"); |
640 | break; | |
641 | default: | |
642 | break; | |
643 | } | |
f35ae634 TL |
644 | l = omap_readl(OTG_CTRL); |
645 | l |= OTG_PULLUP; | |
646 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
647 | } |
648 | ||
08882d20 | 649 | check_state(isp, __func__); |
1da177e4 LT |
650 | dump_regs(isp, "otg->isp1301"); |
651 | } | |
652 | ||
7d12e780 | 653 | static irqreturn_t omap_otg_irq(int irq, void *_isp) |
1da177e4 | 654 | { |
f35ae634 | 655 | u16 otg_irq = omap_readw(OTG_IRQ_SRC); |
1da177e4 LT |
656 | u32 otg_ctrl; |
657 | int ret = IRQ_NONE; | |
658 | struct isp1301 *isp = _isp; | |
819d1c74 | 659 | struct usb_otg *otg = isp->phy.otg; |
1da177e4 | 660 | |
7c9d440e | 661 | /* update ISP1301 transceiver from OTG controller */ |
1da177e4 | 662 | if (otg_irq & OPRT_CHG) { |
f35ae634 | 663 | omap_writew(OPRT_CHG, OTG_IRQ_SRC); |
1da177e4 LT |
664 | isp1301_defer_work(isp, WORK_UPDATE_ISP); |
665 | ret = IRQ_HANDLED; | |
666 | ||
667 | /* SRP to become b_peripheral failed */ | |
668 | } else if (otg_irq & B_SRP_TMROUT) { | |
f35ae634 | 669 | pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL)); |
1da177e4 LT |
670 | notresponding(isp); |
671 | ||
672 | /* gadget drivers that care should monitor all kinds of | |
673 | * remote wakeup (SRP, normal) using their own timer | |
674 | * to give "check cable and A-device" messages. | |
675 | */ | |
e47d9254 | 676 | if (isp->phy.otg->state == OTG_STATE_B_SRP_INIT) |
1da177e4 LT |
677 | b_idle(isp, "srp_timeout"); |
678 | ||
f35ae634 | 679 | omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
680 | ret = IRQ_HANDLED; |
681 | ||
682 | /* HNP to become b_host failed */ | |
683 | } else if (otg_irq & B_HNP_FAIL) { | |
684 | pr_debug("otg: %s B_HNP_FAIL, %06x\n", | |
f35ae634 | 685 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
686 | notresponding(isp); |
687 | ||
f35ae634 | 688 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
689 | otg_ctrl |= OTG_BUSDROP; |
690 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 691 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
692 | |
693 | /* subset of b_peripheral()... */ | |
e47d9254 | 694 | isp->phy.otg->state = OTG_STATE_B_PERIPHERAL; |
1da177e4 LT |
695 | pr_debug(" --> b_peripheral\n"); |
696 | ||
f35ae634 | 697 | omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); |
1da177e4 LT |
698 | ret = IRQ_HANDLED; |
699 | ||
700 | /* detect SRP from B-device ... */ | |
701 | } else if (otg_irq & A_SRP_DETECT) { | |
702 | pr_debug("otg: %s SRP_DETECT, %06x\n", | |
f35ae634 | 703 | state_name(isp), omap_readl(OTG_CTRL)); |
1da177e4 LT |
704 | |
705 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
e47d9254 | 706 | switch (isp->phy.otg->state) { |
1da177e4 | 707 | case OTG_STATE_A_IDLE: |
819d1c74 | 708 | if (!otg->host) |
1da177e4 LT |
709 | break; |
710 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
f35ae634 | 711 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
712 | otg_ctrl |= OTG_A_BUSREQ; |
713 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
714 | & ~OTG_XCEIV_INPUTS | |
715 | & OTG_CTRL_MASK; | |
f35ae634 | 716 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
717 | break; |
718 | default: | |
719 | break; | |
720 | } | |
721 | ||
f35ae634 | 722 | omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); |
1da177e4 LT |
723 | ret = IRQ_HANDLED; |
724 | ||
725 | /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) | |
726 | * we don't track them separately | |
727 | */ | |
728 | } else if (otg_irq & A_REQ_TMROUT) { | |
f35ae634 | 729 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
730 | pr_info("otg: BCON_TMOUT from %s, %06x\n", |
731 | state_name(isp), otg_ctrl); | |
732 | notresponding(isp); | |
733 | ||
734 | otg_ctrl |= OTG_BUSDROP; | |
735 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 736 | omap_writel(otg_ctrl, OTG_CTRL); |
e47d9254 | 737 | isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL; |
1da177e4 | 738 | |
f35ae634 | 739 | omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); |
1da177e4 LT |
740 | ret = IRQ_HANDLED; |
741 | ||
742 | /* A-supplied voltage fell too low; overcurrent */ | |
743 | } else if (otg_irq & A_VBUS_ERR) { | |
f35ae634 | 744 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
745 | printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", |
746 | state_name(isp), otg_irq, otg_ctrl); | |
747 | ||
748 | otg_ctrl |= OTG_BUSDROP; | |
749 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; | |
f35ae634 | 750 | omap_writel(otg_ctrl, OTG_CTRL); |
e47d9254 | 751 | isp->phy.otg->state = OTG_STATE_A_VBUS_ERR; |
1da177e4 | 752 | |
f35ae634 | 753 | omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); |
1da177e4 LT |
754 | ret = IRQ_HANDLED; |
755 | ||
7c9d440e | 756 | /* switch driver; the transceiver code activates it, |
1da177e4 LT |
757 | * ungating the udc clock or resuming OHCI. |
758 | */ | |
759 | } else if (otg_irq & DRIVER_SWITCH) { | |
760 | int kick = 0; | |
761 | ||
f35ae634 | 762 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
763 | printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", |
764 | state_name(isp), | |
765 | (otg_ctrl & OTG_DRIVER_SEL) | |
766 | ? "gadget" : "host", | |
767 | otg_ctrl); | |
768 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
769 | ||
770 | /* role is peripheral */ | |
771 | if (otg_ctrl & OTG_DRIVER_SEL) { | |
e47d9254 | 772 | switch (isp->phy.otg->state) { |
1da177e4 | 773 | case OTG_STATE_A_IDLE: |
08882d20 | 774 | b_idle(isp, __func__); |
1da177e4 LT |
775 | break; |
776 | default: | |
777 | break; | |
778 | } | |
779 | isp1301_defer_work(isp, WORK_UPDATE_ISP); | |
780 | ||
781 | /* role is host */ | |
782 | } else { | |
783 | if (!(otg_ctrl & OTG_ID)) { | |
25da383d | 784 | otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; |
f35ae634 | 785 | omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL); |
1da177e4 LT |
786 | } |
787 | ||
819d1c74 | 788 | if (otg->host) { |
e47d9254 | 789 | switch (isp->phy.otg->state) { |
1da177e4 | 790 | case OTG_STATE_B_WAIT_ACON: |
e47d9254 | 791 | isp->phy.otg->state = OTG_STATE_B_HOST; |
1da177e4 LT |
792 | pr_debug(" --> b_host\n"); |
793 | kick = 1; | |
794 | break; | |
795 | case OTG_STATE_A_WAIT_BCON: | |
e47d9254 | 796 | isp->phy.otg->state = OTG_STATE_A_HOST; |
1da177e4 LT |
797 | pr_debug(" --> a_host\n"); |
798 | break; | |
799 | case OTG_STATE_A_PERIPHERAL: | |
e47d9254 | 800 | isp->phy.otg->state = OTG_STATE_A_WAIT_BCON; |
1da177e4 LT |
801 | pr_debug(" --> a_wait_bcon\n"); |
802 | break; | |
803 | default: | |
804 | break; | |
805 | } | |
806 | isp1301_defer_work(isp, WORK_HOST_RESUME); | |
807 | } | |
808 | } | |
809 | ||
f35ae634 | 810 | omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); |
1da177e4 LT |
811 | ret = IRQ_HANDLED; |
812 | ||
813 | if (kick) | |
819d1c74 | 814 | usb_bus_start_enum(otg->host, otg->host->otg_port); |
1da177e4 LT |
815 | } |
816 | ||
08882d20 | 817 | check_state(isp, __func__); |
1da177e4 LT |
818 | return ret; |
819 | } | |
820 | ||
821 | static struct platform_device *otg_dev; | |
822 | ||
465f8294 | 823 | static int isp1301_otg_init(struct isp1301 *isp) |
1da177e4 | 824 | { |
f35ae634 TL |
825 | u32 l; |
826 | ||
1da177e4 LT |
827 | if (!otg_dev) |
828 | return -ENODEV; | |
829 | ||
08882d20 | 830 | dump_regs(isp, __func__); |
1da177e4 | 831 | /* some of these values are board-specific... */ |
f35ae634 TL |
832 | l = omap_readl(OTG_SYSCON_2); |
833 | l |= OTG_EN | |
1da177e4 LT |
834 | /* for B-device: */ |
835 | | SRP_GPDATA /* 9msec Bdev D+ pulse */ | |
836 | | SRP_GPDVBUS /* discharge after VBUS pulse */ | |
837 | // | (3 << 24) /* 2msec VBUS pulse */ | |
838 | /* for A-device: */ | |
839 | | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ | |
840 | | SRP_DPW /* detect 167+ns SRP pulses */ | |
841 | | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ | |
842 | ; | |
f35ae634 | 843 | omap_writel(l, OTG_SYSCON_2); |
1da177e4 LT |
844 | |
845 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
846 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
847 | ||
08882d20 | 848 | check_state(isp, __func__); |
1da177e4 | 849 | pr_debug("otg: %s, %s %06x\n", |
f35ae634 | 850 | state_name(isp), __func__, omap_readl(OTG_CTRL)); |
1da177e4 | 851 | |
f35ae634 | 852 | omap_writew(DRIVER_SWITCH | OPRT_CHG |
1da177e4 | 853 | | B_SRP_TMROUT | B_HNP_FAIL |
f35ae634 TL |
854 | | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN); |
855 | ||
856 | l = omap_readl(OTG_SYSCON_2); | |
857 | l |= OTG_EN; | |
858 | omap_writel(l, OTG_SYSCON_2); | |
1da177e4 LT |
859 | |
860 | return 0; | |
861 | } | |
862 | ||
3ae5eaec | 863 | static int otg_probe(struct platform_device *dev) |
1da177e4 LT |
864 | { |
865 | // struct omap_usb_config *config = dev->platform_data; | |
866 | ||
3ae5eaec | 867 | otg_dev = dev; |
1da177e4 LT |
868 | return 0; |
869 | } | |
870 | ||
3ae5eaec | 871 | static int otg_remove(struct platform_device *dev) |
1da177e4 | 872 | { |
d1846b0e | 873 | otg_dev = NULL; |
1da177e4 LT |
874 | return 0; |
875 | } | |
876 | ||
d1846b0e | 877 | static struct platform_driver omap_otg_driver = { |
1da177e4 | 878 | .probe = otg_probe, |
3ae5eaec RK |
879 | .remove = otg_remove, |
880 | .driver = { | |
3ae5eaec RK |
881 | .name = "omap_otg", |
882 | }, | |
1da177e4 LT |
883 | }; |
884 | ||
885 | static int otg_bind(struct isp1301 *isp) | |
886 | { | |
887 | int status; | |
888 | ||
889 | if (otg_dev) | |
890 | return -EBUSY; | |
891 | ||
3ae5eaec | 892 | status = platform_driver_register(&omap_otg_driver); |
1da177e4 LT |
893 | if (status < 0) |
894 | return status; | |
895 | ||
896 | if (otg_dev) | |
897 | status = request_irq(otg_dev->resource[1].start, omap_otg_irq, | |
b5dd18d8 | 898 | 0, DRIVER_NAME, isp); |
1da177e4 LT |
899 | else |
900 | status = -ENODEV; | |
901 | ||
902 | if (status < 0) | |
3ae5eaec | 903 | platform_driver_unregister(&omap_otg_driver); |
1da177e4 LT |
904 | return status; |
905 | } | |
906 | ||
907 | static void otg_unbind(struct isp1301 *isp) | |
908 | { | |
909 | if (!otg_dev) | |
910 | return; | |
911 | free_irq(otg_dev->resource[1].start, isp); | |
912 | } | |
913 | ||
914 | #else | |
915 | ||
916 | /* OTG controller isn't clocked */ | |
917 | ||
918 | #endif /* CONFIG_USB_OTG */ | |
919 | ||
920 | /*-------------------------------------------------------------------------*/ | |
921 | ||
922 | static void b_peripheral(struct isp1301 *isp) | |
923 | { | |
f35ae634 TL |
924 | u32 l; |
925 | ||
926 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; | |
927 | omap_writel(l, OTG_CTRL); | |
928 | ||
819d1c74 | 929 | usb_gadget_vbus_connect(isp->phy.otg->gadget); |
1da177e4 LT |
930 | |
931 | #ifdef CONFIG_USB_OTG | |
932 | enable_vbus_draw(isp, 8); | |
933 | otg_update_isp(isp); | |
934 | #else | |
935 | enable_vbus_draw(isp, 100); | |
936 | /* UDC driver just set OTG_BSESSVLD */ | |
937 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); | |
938 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); | |
e47d9254 | 939 | isp->phy.otg->state = OTG_STATE_B_PERIPHERAL; |
1da177e4 LT |
940 | pr_debug(" --> b_peripheral\n"); |
941 | dump_regs(isp, "2periph"); | |
942 | #endif | |
943 | } | |
944 | ||
945 | static void isp_update_otg(struct isp1301 *isp, u8 stat) | |
946 | { | |
819d1c74 | 947 | struct usb_otg *otg = isp->phy.otg; |
1da177e4 | 948 | u8 isp_stat, isp_bstat; |
e47d9254 | 949 | enum usb_otg_state state = isp->phy.otg->state; |
1da177e4 LT |
950 | |
951 | if (stat & INTR_BDIS_ACON) | |
952 | pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); | |
953 | ||
954 | /* start certain state transitions right away */ | |
955 | isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); | |
956 | if (isp_stat & INTR_ID_GND) { | |
819d1c74 | 957 | if (otg->default_a) { |
1da177e4 LT |
958 | switch (state) { |
959 | case OTG_STATE_B_IDLE: | |
960 | a_idle(isp, "idle"); | |
961 | /* FALLTHROUGH */ | |
962 | case OTG_STATE_A_IDLE: | |
963 | enable_vbus_source(isp); | |
964 | /* FALLTHROUGH */ | |
965 | case OTG_STATE_A_WAIT_VRISE: | |
966 | /* we skip over OTG_STATE_A_WAIT_BCON, since | |
967 | * the HC will transition to A_HOST (or | |
968 | * A_SUSPEND!) without our noticing except | |
969 | * when HNP is used. | |
970 | */ | |
971 | if (isp_stat & INTR_VBUS_VLD) | |
e47d9254 | 972 | isp->phy.otg->state = OTG_STATE_A_HOST; |
1da177e4 LT |
973 | break; |
974 | case OTG_STATE_A_WAIT_VFALL: | |
975 | if (!(isp_stat & INTR_SESS_VLD)) | |
976 | a_idle(isp, "vfell"); | |
977 | break; | |
978 | default: | |
979 | if (!(isp_stat & INTR_VBUS_VLD)) | |
e47d9254 | 980 | isp->phy.otg->state = OTG_STATE_A_VBUS_ERR; |
1da177e4 LT |
981 | break; |
982 | } | |
983 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
984 | } else { | |
985 | switch (state) { | |
986 | case OTG_STATE_B_PERIPHERAL: | |
987 | case OTG_STATE_B_HOST: | |
988 | case OTG_STATE_B_WAIT_ACON: | |
819d1c74 | 989 | usb_gadget_vbus_disconnect(otg->gadget); |
1da177e4 LT |
990 | break; |
991 | default: | |
992 | break; | |
993 | } | |
994 | if (state != OTG_STATE_A_IDLE) | |
995 | a_idle(isp, "id"); | |
819d1c74 | 996 | if (otg->host && state == OTG_STATE_A_IDLE) |
1da177e4 LT |
997 | isp1301_defer_work(isp, WORK_HOST_RESUME); |
998 | isp_bstat = 0; | |
999 | } | |
1000 | } else { | |
f35ae634 TL |
1001 | u32 l; |
1002 | ||
1da177e4 LT |
1003 | /* if user unplugged mini-A end of cable, |
1004 | * don't bypass A_WAIT_VFALL. | |
1005 | */ | |
819d1c74 | 1006 | if (otg->default_a) { |
1da177e4 LT |
1007 | switch (state) { |
1008 | default: | |
e47d9254 | 1009 | isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL; |
1da177e4 LT |
1010 | break; |
1011 | case OTG_STATE_A_WAIT_VFALL: | |
1012 | state = OTG_STATE_A_IDLE; | |
37ebb549 | 1013 | /* hub_wq may take a while to notice and |
1da177e4 LT |
1014 | * handle this disconnect, so don't go |
1015 | * to B_IDLE quite yet. | |
1016 | */ | |
1017 | break; | |
1018 | case OTG_STATE_A_IDLE: | |
1019 | host_suspend(isp); | |
1020 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, | |
1021 | MC1_BDIS_ACON_EN); | |
e47d9254 | 1022 | isp->phy.otg->state = OTG_STATE_B_IDLE; |
f35ae634 TL |
1023 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; |
1024 | l &= ~OTG_CTRL_BITS; | |
1025 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1026 | break; |
1027 | case OTG_STATE_B_IDLE: | |
1028 | break; | |
1029 | } | |
1030 | } | |
1031 | isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); | |
1032 | ||
e47d9254 | 1033 | switch (isp->phy.otg->state) { |
1da177e4 LT |
1034 | case OTG_STATE_B_PERIPHERAL: |
1035 | case OTG_STATE_B_WAIT_ACON: | |
1036 | case OTG_STATE_B_HOST: | |
1037 | if (likely(isp_bstat & OTG_B_SESS_VLD)) | |
1038 | break; | |
1039 | enable_vbus_draw(isp, 0); | |
1040 | #ifndef CONFIG_USB_OTG | |
1041 | /* UDC driver will clear OTG_BSESSVLD */ | |
1042 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1043 | OTG1_DP_PULLDOWN); | |
1044 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1045 | OTG1_DP_PULLUP); | |
08882d20 | 1046 | dump_regs(isp, __func__); |
1da177e4 LT |
1047 | #endif |
1048 | /* FALLTHROUGH */ | |
1049 | case OTG_STATE_B_SRP_INIT: | |
08882d20 | 1050 | b_idle(isp, __func__); |
f35ae634 TL |
1051 | l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; |
1052 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1053 | /* FALLTHROUGH */ |
1054 | case OTG_STATE_B_IDLE: | |
819d1c74 | 1055 | if (otg->gadget && (isp_bstat & OTG_B_SESS_VLD)) { |
1da177e4 LT |
1056 | #ifdef CONFIG_USB_OTG |
1057 | update_otg1(isp, isp_stat); | |
1058 | update_otg2(isp, isp_bstat); | |
1059 | #endif | |
1060 | b_peripheral(isp); | |
1061 | } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) | |
1062 | isp_bstat |= OTG_B_SESS_END; | |
1063 | break; | |
1064 | case OTG_STATE_A_WAIT_VFALL: | |
1065 | break; | |
1066 | default: | |
1067 | pr_debug("otg: unsupported b-device %s\n", | |
1068 | state_name(isp)); | |
1069 | break; | |
1070 | } | |
1071 | } | |
1072 | ||
e47d9254 | 1073 | if (state != isp->phy.otg->state) |
1da177e4 | 1074 | pr_debug(" isp, %s -> %s\n", |
42c0bf1c | 1075 | usb_otg_state_string(state), state_name(isp)); |
1da177e4 LT |
1076 | |
1077 | #ifdef CONFIG_USB_OTG | |
1078 | /* update the OTG controller state to match the isp1301; may | |
1079 | * trigger OPRT_CHG irqs for changes going to the isp1301. | |
1080 | */ | |
1081 | update_otg1(isp, isp_stat); | |
1082 | update_otg2(isp, isp_bstat); | |
08882d20 | 1083 | check_state(isp, __func__); |
1da177e4 LT |
1084 | #endif |
1085 | ||
1086 | dump_regs(isp, "isp1301->otg"); | |
1087 | } | |
1088 | ||
1089 | /*-------------------------------------------------------------------------*/ | |
1090 | ||
1091 | static u8 isp1301_clear_latch(struct isp1301 *isp) | |
1092 | { | |
1093 | u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); | |
1094 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); | |
1095 | return latch; | |
1096 | } | |
1097 | ||
1098 | static void | |
25da383d | 1099 | isp1301_work(struct work_struct *work) |
1da177e4 | 1100 | { |
25da383d | 1101 | struct isp1301 *isp = container_of(work, struct isp1301, work); |
1da177e4 LT |
1102 | int stop; |
1103 | ||
1104 | /* implicit lock: we're the only task using this device */ | |
1105 | isp->working = 1; | |
1106 | do { | |
1107 | stop = test_bit(WORK_STOP, &isp->todo); | |
1108 | ||
1109 | #ifdef CONFIG_USB_OTG | |
1110 | /* transfer state from otg engine to isp1301 */ | |
1111 | if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { | |
1112 | otg_update_isp(isp); | |
a5f08a32 | 1113 | put_device(&isp->client->dev); |
1da177e4 LT |
1114 | } |
1115 | #endif | |
1116 | /* transfer state from isp1301 to otg engine */ | |
1117 | if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { | |
1118 | u8 stat = isp1301_clear_latch(isp); | |
1119 | ||
1120 | isp_update_otg(isp, stat); | |
a5f08a32 | 1121 | put_device(&isp->client->dev); |
1da177e4 LT |
1122 | } |
1123 | ||
1124 | if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { | |
1125 | u32 otg_ctrl; | |
1126 | ||
1127 | /* | |
1128 | * skip A_WAIT_VRISE; hc transitions invisibly | |
1129 | * skip A_WAIT_BCON; same. | |
1130 | */ | |
e47d9254 | 1131 | switch (isp->phy.otg->state) { |
1da177e4 LT |
1132 | case OTG_STATE_A_WAIT_BCON: |
1133 | case OTG_STATE_A_WAIT_VRISE: | |
e47d9254 | 1134 | isp->phy.otg->state = OTG_STATE_A_HOST; |
1da177e4 | 1135 | pr_debug(" --> a_host\n"); |
f35ae634 | 1136 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1137 | otg_ctrl |= OTG_A_BUSREQ; |
1138 | otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) | |
1139 | & OTG_CTRL_MASK; | |
f35ae634 | 1140 | omap_writel(otg_ctrl, OTG_CTRL); |
1da177e4 LT |
1141 | break; |
1142 | case OTG_STATE_B_WAIT_ACON: | |
e47d9254 | 1143 | isp->phy.otg->state = OTG_STATE_B_HOST; |
1da177e4 LT |
1144 | pr_debug(" --> b_host (acon)\n"); |
1145 | break; | |
1146 | case OTG_STATE_B_HOST: | |
1147 | case OTG_STATE_B_IDLE: | |
1148 | case OTG_STATE_A_IDLE: | |
1149 | break; | |
1150 | default: | |
1151 | pr_debug(" host resume in %s\n", | |
1152 | state_name(isp)); | |
1153 | } | |
1154 | host_resume(isp); | |
1155 | // mdelay(10); | |
a5f08a32 | 1156 | put_device(&isp->client->dev); |
1da177e4 LT |
1157 | } |
1158 | ||
1159 | if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { | |
1160 | #ifdef VERBOSE | |
1161 | dump_regs(isp, "timer"); | |
1162 | if (!stop) | |
1163 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1164 | #endif | |
a5f08a32 | 1165 | put_device(&isp->client->dev); |
1da177e4 LT |
1166 | } |
1167 | ||
1168 | if (isp->todo) | |
a5f08a32 | 1169 | dev_vdbg(&isp->client->dev, |
1da177e4 LT |
1170 | "work done, todo = 0x%lx\n", |
1171 | isp->todo); | |
1172 | if (stop) { | |
a5f08a32 | 1173 | dev_dbg(&isp->client->dev, "stop\n"); |
1da177e4 LT |
1174 | break; |
1175 | } | |
1176 | } while (isp->todo); | |
1177 | isp->working = 0; | |
1178 | } | |
1179 | ||
7d12e780 | 1180 | static irqreturn_t isp1301_irq(int irq, void *isp) |
1da177e4 LT |
1181 | { |
1182 | isp1301_defer_work(isp, WORK_UPDATE_OTG); | |
1183 | return IRQ_HANDLED; | |
1184 | } | |
1185 | ||
1186 | static void isp1301_timer(unsigned long _isp) | |
1187 | { | |
1188 | isp1301_defer_work((void *)_isp, WORK_TIMER); | |
1189 | } | |
1190 | ||
1191 | /*-------------------------------------------------------------------------*/ | |
1192 | ||
1193 | static void isp1301_release(struct device *dev) | |
1194 | { | |
1195 | struct isp1301 *isp; | |
1196 | ||
a5f08a32 | 1197 | isp = dev_get_drvdata(dev); |
1da177e4 | 1198 | |
d1846b0e DB |
1199 | /* FIXME -- not with a "new style" driver, it doesn't!! */ |
1200 | ||
1da177e4 LT |
1201 | /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ |
1202 | if (isp->i2c_release) | |
1203 | isp->i2c_release(dev); | |
819d1c74 | 1204 | kfree(isp->phy.otg); |
1da177e4 LT |
1205 | kfree (isp); |
1206 | } | |
1207 | ||
1208 | static struct isp1301 *the_transceiver; | |
1209 | ||
39d35681 | 1210 | static int isp1301_remove(struct i2c_client *i2c) |
1da177e4 LT |
1211 | { |
1212 | struct isp1301 *isp; | |
1213 | ||
a5f08a32 | 1214 | isp = i2c_get_clientdata(i2c); |
1da177e4 LT |
1215 | |
1216 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1217 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
9df013b3 | 1218 | free_irq(i2c->irq, isp); |
1da177e4 LT |
1219 | #ifdef CONFIG_USB_OTG |
1220 | otg_unbind(isp); | |
1221 | #endif | |
1222 | if (machine_is_omap_h2()) | |
d1846b0e | 1223 | gpio_free(2); |
1da177e4 LT |
1224 | |
1225 | isp->timer.data = 0; | |
1226 | set_bit(WORK_STOP, &isp->todo); | |
1227 | del_timer_sync(&isp->timer); | |
43829731 | 1228 | flush_work(&isp->work); |
1da177e4 LT |
1229 | |
1230 | put_device(&i2c->dev); | |
d1846b0e | 1231 | the_transceiver = NULL; |
1da177e4 | 1232 | |
9df013b3 | 1233 | return 0; |
1da177e4 LT |
1234 | } |
1235 | ||
1236 | /*-------------------------------------------------------------------------*/ | |
1237 | ||
1238 | /* NOTE: three modes are possible here, only one of which | |
1239 | * will be standards-conformant on any given system: | |
1240 | * | |
1241 | * - OTG mode (dual-role), required if there's a Mini-AB connector | |
1242 | * - HOST mode, for when there's one or more A (host) connectors | |
1243 | * - DEVICE mode, for when there's a B/Mini-B (device) connector | |
1244 | * | |
1245 | * As a rule, you won't have an isp1301 chip unless it's there to | |
25da383d | 1246 | * support the OTG mode. Other modes help testing USB controllers |
1da177e4 LT |
1247 | * in isolation from (full) OTG support, or maybe so later board |
1248 | * revisions can help to support those feature. | |
1249 | */ | |
1250 | ||
1251 | #ifdef CONFIG_USB_OTG | |
1252 | ||
1253 | static int isp1301_otg_enable(struct isp1301 *isp) | |
1254 | { | |
1255 | power_up(isp); | |
465f8294 | 1256 | isp1301_otg_init(isp); |
1da177e4 LT |
1257 | |
1258 | /* NOTE: since we don't change this, this provides | |
1259 | * a few more interrupts than are strictly needed. | |
1260 | */ | |
1261 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1262 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1263 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1264 | INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); |
1da177e4 | 1265 | |
a5f08a32 | 1266 | dev_info(&isp->client->dev, "ready for dual-role USB ...\n"); |
1da177e4 LT |
1267 | |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | #endif | |
1272 | ||
1273 | /* add or disable the host device+driver */ | |
1274 | static int | |
819d1c74 | 1275 | isp1301_set_host(struct usb_otg *otg, struct usb_bus *host) |
1da177e4 | 1276 | { |
19c1eac2 | 1277 | struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy); |
1da177e4 | 1278 | |
8b42a746 | 1279 | if (isp != the_transceiver) |
1da177e4 LT |
1280 | return -ENODEV; |
1281 | ||
1282 | if (!host) { | |
f35ae634 | 1283 | omap_writew(0, OTG_IRQ_EN); |
1da177e4 | 1284 | power_down(isp); |
819d1c74 | 1285 | otg->host = NULL; |
1da177e4 LT |
1286 | return 0; |
1287 | } | |
1288 | ||
1289 | #ifdef CONFIG_USB_OTG | |
819d1c74 | 1290 | otg->host = host; |
a5f08a32 | 1291 | dev_dbg(&isp->client->dev, "registered host\n"); |
1da177e4 | 1292 | host_suspend(isp); |
819d1c74 | 1293 | if (otg->gadget) |
1da177e4 LT |
1294 | return isp1301_otg_enable(isp); |
1295 | return 0; | |
1296 | ||
77c2f02e | 1297 | #elif !IS_ENABLED(CONFIG_USB_OMAP) |
1da177e4 | 1298 | // FIXME update its refcount |
819d1c74 | 1299 | otg->host = host; |
1da177e4 LT |
1300 | |
1301 | power_up(isp); | |
1302 | ||
1303 | if (machine_is_omap_h2()) | |
1304 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); | |
1305 | ||
a5f08a32 | 1306 | dev_info(&isp->client->dev, "A-Host sessions ok\n"); |
1da177e4 | 1307 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, |
25da383d | 1308 | INTR_ID_GND); |
1da177e4 | 1309 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1310 | INTR_ID_GND); |
1da177e4 LT |
1311 | |
1312 | /* If this has a Mini-AB connector, this mode is highly | |
1313 | * nonstandard ... but can be handy for testing, especially with | |
1314 | * the Mini-A end of an OTG cable. (Or something nonstandard | |
1315 | * like MiniB-to-StandardB, maybe built with a gender mender.) | |
1316 | */ | |
1317 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); | |
1318 | ||
08882d20 | 1319 | dump_regs(isp, __func__); |
1da177e4 LT |
1320 | |
1321 | return 0; | |
1322 | ||
1323 | #else | |
a5f08a32 | 1324 | dev_dbg(&isp->client->dev, "host sessions not allowed\n"); |
1da177e4 LT |
1325 | return -EINVAL; |
1326 | #endif | |
1327 | ||
1328 | } | |
1329 | ||
1330 | static int | |
819d1c74 | 1331 | isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget) |
1da177e4 | 1332 | { |
19c1eac2 | 1333 | struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy); |
1da177e4 | 1334 | |
8b42a746 | 1335 | if (isp != the_transceiver) |
1da177e4 LT |
1336 | return -ENODEV; |
1337 | ||
1338 | if (!gadget) { | |
f35ae634 | 1339 | omap_writew(0, OTG_IRQ_EN); |
819d1c74 | 1340 | if (!otg->default_a) |
1da177e4 | 1341 | enable_vbus_draw(isp, 0); |
819d1c74 HK |
1342 | usb_gadget_vbus_disconnect(otg->gadget); |
1343 | otg->gadget = NULL; | |
1da177e4 LT |
1344 | power_down(isp); |
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | #ifdef CONFIG_USB_OTG | |
819d1c74 | 1349 | otg->gadget = gadget; |
a5f08a32 | 1350 | dev_dbg(&isp->client->dev, "registered gadget\n"); |
1da177e4 | 1351 | /* gadget driver may be suspended until vbus_connect () */ |
819d1c74 | 1352 | if (otg->host) |
1da177e4 LT |
1353 | return isp1301_otg_enable(isp); |
1354 | return 0; | |
1355 | ||
1356 | #elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) | |
819d1c74 | 1357 | otg->gadget = gadget; |
1da177e4 LT |
1358 | // FIXME update its refcount |
1359 | ||
79d6680f PW |
1360 | { |
1361 | u32 l; | |
1362 | ||
1363 | l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; | |
1364 | l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS); | |
1365 | l |= OTG_ID; | |
1366 | omap_writel(l, OTG_CTRL); | |
1367 | } | |
f35ae634 | 1368 | |
1da177e4 | 1369 | power_up(isp); |
e47d9254 | 1370 | isp->phy.otg->state = OTG_STATE_B_IDLE; |
1da177e4 | 1371 | |
d1846b0e | 1372 | if (machine_is_omap_h2() || machine_is_omap_h3()) |
1da177e4 LT |
1373 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); |
1374 | ||
1375 | isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, | |
25da383d | 1376 | INTR_SESS_VLD); |
1da177e4 | 1377 | isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, |
25da383d | 1378 | INTR_VBUS_VLD); |
a5f08a32 | 1379 | dev_info(&isp->client->dev, "B-Peripheral sessions ok\n"); |
08882d20 | 1380 | dump_regs(isp, __func__); |
1da177e4 LT |
1381 | |
1382 | /* If this has a Mini-AB connector, this mode is highly | |
1383 | * nonstandard ... but can be handy for testing, so long | |
1384 | * as you don't plug a Mini-A cable into the jack. | |
1385 | */ | |
1386 | if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) | |
1387 | b_peripheral(isp); | |
1388 | ||
1389 | return 0; | |
1390 | ||
1391 | #else | |
a5f08a32 | 1392 | dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n"); |
1da177e4 LT |
1393 | return -EINVAL; |
1394 | #endif | |
1395 | } | |
1396 | ||
1397 | ||
1398 | /*-------------------------------------------------------------------------*/ | |
1399 | ||
1400 | static int | |
86753811 | 1401 | isp1301_set_power(struct usb_phy *dev, unsigned mA) |
1da177e4 LT |
1402 | { |
1403 | if (!the_transceiver) | |
1404 | return -ENODEV; | |
e47d9254 | 1405 | if (dev->otg->state == OTG_STATE_B_PERIPHERAL) |
1da177e4 LT |
1406 | enable_vbus_draw(the_transceiver, mA); |
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | static int | |
819d1c74 | 1411 | isp1301_start_srp(struct usb_otg *otg) |
1da177e4 | 1412 | { |
19c1eac2 | 1413 | struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy); |
1da177e4 LT |
1414 | u32 otg_ctrl; |
1415 | ||
e47d9254 | 1416 | if (isp != the_transceiver || isp->phy.otg->state != OTG_STATE_B_IDLE) |
1da177e4 LT |
1417 | return -ENODEV; |
1418 | ||
f35ae634 | 1419 | otg_ctrl = omap_readl(OTG_CTRL); |
1da177e4 LT |
1420 | if (!(otg_ctrl & OTG_BSESSEND)) |
1421 | return -EINVAL; | |
1422 | ||
1423 | otg_ctrl |= OTG_B_BUSREQ; | |
1424 | otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; | |
f35ae634 | 1425 | omap_writel(otg_ctrl, OTG_CTRL); |
e47d9254 | 1426 | isp->phy.otg->state = OTG_STATE_B_SRP_INIT; |
1da177e4 | 1427 | |
f35ae634 TL |
1428 | pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), |
1429 | omap_readl(OTG_CTRL)); | |
1da177e4 | 1430 | #ifdef CONFIG_USB_OTG |
08882d20 | 1431 | check_state(isp, __func__); |
1da177e4 LT |
1432 | #endif |
1433 | return 0; | |
1434 | } | |
1435 | ||
1436 | static int | |
819d1c74 | 1437 | isp1301_start_hnp(struct usb_otg *otg) |
1da177e4 LT |
1438 | { |
1439 | #ifdef CONFIG_USB_OTG | |
19c1eac2 | 1440 | struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy); |
f35ae634 | 1441 | u32 l; |
1da177e4 | 1442 | |
8b42a746 | 1443 | if (isp != the_transceiver) |
1da177e4 | 1444 | return -ENODEV; |
819d1c74 | 1445 | if (otg->default_a && (otg->host == NULL || !otg->host->b_hnp_enable)) |
1da177e4 | 1446 | return -ENOTCONN; |
819d1c74 HK |
1447 | if (!otg->default_a && (otg->gadget == NULL |
1448 | || !otg->gadget->b_hnp_enable)) | |
1da177e4 LT |
1449 | return -ENOTCONN; |
1450 | ||
1451 | /* We want hardware to manage most HNP protocol timings. | |
1452 | * So do this part as early as possible... | |
1453 | */ | |
e47d9254 | 1454 | switch (isp->phy.otg->state) { |
1da177e4 | 1455 | case OTG_STATE_B_HOST: |
e47d9254 | 1456 | isp->phy.otg->state = OTG_STATE_B_PERIPHERAL; |
1da177e4 LT |
1457 | /* caller will suspend next */ |
1458 | break; | |
1459 | case OTG_STATE_A_HOST: | |
1460 | #if 0 | |
1461 | /* autoconnect mode avoids irq latency bugs */ | |
1462 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
1463 | MC1_BDIS_ACON_EN); | |
1464 | #endif | |
1465 | /* caller must suspend then clear A_BUSREQ */ | |
819d1c74 | 1466 | usb_gadget_vbus_connect(otg->gadget); |
f35ae634 TL |
1467 | l = omap_readl(OTG_CTRL); |
1468 | l |= OTG_A_SETB_HNPEN; | |
1469 | omap_writel(l, OTG_CTRL); | |
1da177e4 LT |
1470 | |
1471 | break; | |
1472 | case OTG_STATE_A_PERIPHERAL: | |
1473 | /* initiated by B-Host suspend */ | |
1474 | break; | |
1475 | default: | |
1476 | return -EILSEQ; | |
1477 | } | |
1478 | pr_debug("otg: HNP %s, %06x ...\n", | |
f35ae634 | 1479 | state_name(isp), omap_readl(OTG_CTRL)); |
08882d20 | 1480 | check_state(isp, __func__); |
1da177e4 LT |
1481 | return 0; |
1482 | #else | |
1483 | /* srp-only */ | |
1484 | return -EINVAL; | |
1485 | #endif | |
1486 | } | |
1487 | ||
1488 | /*-------------------------------------------------------------------------*/ | |
1489 | ||
41ac7b3a | 1490 | static int |
d1846b0e | 1491 | isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id) |
1da177e4 LT |
1492 | { |
1493 | int status; | |
1494 | struct isp1301 *isp; | |
1da177e4 LT |
1495 | |
1496 | if (the_transceiver) | |
1497 | return 0; | |
1498 | ||
82ca76b6 | 1499 | isp = kzalloc(sizeof *isp, GFP_KERNEL); |
1da177e4 LT |
1500 | if (!isp) |
1501 | return 0; | |
1502 | ||
819d1c74 HK |
1503 | isp->phy.otg = kzalloc(sizeof *isp->phy.otg, GFP_KERNEL); |
1504 | if (!isp->phy.otg) { | |
1505 | kfree(isp); | |
1506 | return 0; | |
1507 | } | |
1508 | ||
25da383d | 1509 | INIT_WORK(&isp->work, isp1301_work); |
1da177e4 LT |
1510 | init_timer(&isp->timer); |
1511 | isp->timer.function = isp1301_timer; | |
1512 | isp->timer.data = (unsigned long) isp; | |
1513 | ||
9df013b3 JD |
1514 | i2c_set_clientdata(i2c, isp); |
1515 | isp->client = i2c; | |
1da177e4 | 1516 | |
25985edc | 1517 | /* verify the chip (shouldn't be necessary) */ |
9df013b3 JD |
1518 | status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); |
1519 | if (status != I2C_VENDOR_ID_PHILIPS) { | |
1520 | dev_dbg(&i2c->dev, "not philips id: %d\n", status); | |
1521 | goto fail; | |
1522 | } | |
1523 | status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); | |
1524 | if (status != I2C_PRODUCT_ID_PHILIPS_1301) { | |
1525 | dev_dbg(&i2c->dev, "not isp1301, %d\n", status); | |
1526 | goto fail; | |
1da177e4 LT |
1527 | } |
1528 | isp->i2c_release = i2c->dev.release; | |
1529 | i2c->dev.release = isp1301_release; | |
1530 | ||
1531 | /* initial development used chiprev 2.00 */ | |
1532 | status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); | |
1533 | dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", | |
1534 | status >> 8, status & 0xff); | |
1535 | ||
1536 | /* make like power-on reset */ | |
1537 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); | |
1538 | ||
1539 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); | |
1540 | isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); | |
1541 | ||
1542 | isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, | |
1543 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); | |
1544 | isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, | |
1545 | ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
1546 | ||
1547 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); | |
1548 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); | |
1549 | isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); | |
1550 | ||
1551 | #ifdef CONFIG_USB_OTG | |
1552 | status = otg_bind(isp); | |
1553 | if (status < 0) { | |
1554 | dev_dbg(&i2c->dev, "can't bind OTG\n"); | |
9df013b3 | 1555 | goto fail; |
1da177e4 LT |
1556 | } |
1557 | #endif | |
1558 | ||
1559 | if (machine_is_omap_h2()) { | |
1560 | /* full speed signaling by default */ | |
1561 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, | |
cbbcb9b0 | 1562 | MC1_SPEED); |
1da177e4 LT |
1563 | isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, |
1564 | MC2_SPD_SUSP_CTRL); | |
1565 | ||
1566 | /* IRQ wired at M14 */ | |
1567 | omap_cfg_reg(M14_1510_GPIO2); | |
25da383d DB |
1568 | if (gpio_request(2, "isp1301") == 0) |
1569 | gpio_direction_input(2); | |
1570 | isp->irq_type = IRQF_TRIGGER_FALLING; | |
1da177e4 LT |
1571 | } |
1572 | ||
9df013b3 | 1573 | status = request_irq(i2c->irq, isp1301_irq, |
25da383d | 1574 | isp->irq_type, DRIVER_NAME, isp); |
1da177e4 LT |
1575 | if (status < 0) { |
1576 | dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", | |
9df013b3 JD |
1577 | i2c->irq, status); |
1578 | goto fail; | |
1da177e4 LT |
1579 | } |
1580 | ||
819d1c74 HK |
1581 | isp->phy.dev = &i2c->dev; |
1582 | isp->phy.label = DRIVER_NAME; | |
1583 | isp->phy.set_power = isp1301_set_power, | |
1da177e4 | 1584 | |
19c1eac2 | 1585 | isp->phy.otg->usb_phy = &isp->phy; |
819d1c74 HK |
1586 | isp->phy.otg->set_host = isp1301_set_host, |
1587 | isp->phy.otg->set_peripheral = isp1301_set_peripheral, | |
1588 | isp->phy.otg->start_srp = isp1301_start_srp, | |
1589 | isp->phy.otg->start_hnp = isp1301_start_hnp, | |
1da177e4 LT |
1590 | |
1591 | enable_vbus_draw(isp, 0); | |
1592 | power_down(isp); | |
1593 | the_transceiver = isp; | |
1594 | ||
1595 | #ifdef CONFIG_USB_OTG | |
1596 | update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); | |
1597 | update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); | |
1598 | #endif | |
1599 | ||
08882d20 | 1600 | dump_regs(isp, __func__); |
1da177e4 LT |
1601 | |
1602 | #ifdef VERBOSE | |
1603 | mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); | |
1604 | dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); | |
1605 | #endif | |
1606 | ||
662dca54 | 1607 | status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2); |
1da177e4 LT |
1608 | if (status < 0) |
1609 | dev_err(&i2c->dev, "can't register transceiver, %d\n", | |
1610 | status); | |
1611 | ||
1612 | return 0; | |
1da177e4 | 1613 | |
9df013b3 | 1614 | fail: |
819d1c74 | 1615 | kfree(isp->phy.otg); |
9df013b3 JD |
1616 | kfree(isp); |
1617 | return -ENODEV; | |
1da177e4 LT |
1618 | } |
1619 | ||
9df013b3 JD |
1620 | static const struct i2c_device_id isp1301_id[] = { |
1621 | { "isp1301_omap", 0 }, | |
1622 | { } | |
1623 | }; | |
1624 | MODULE_DEVICE_TABLE(i2c, isp1301_id); | |
1625 | ||
1da177e4 | 1626 | static struct i2c_driver isp1301_driver = { |
a9718b0c | 1627 | .driver = { |
a9718b0c LR |
1628 | .name = "isp1301_omap", |
1629 | }, | |
9df013b3 | 1630 | .probe = isp1301_probe, |
39d35681 | 1631 | .remove = isp1301_remove, |
9df013b3 | 1632 | .id_table = isp1301_id, |
1da177e4 LT |
1633 | }; |
1634 | ||
1635 | /*-------------------------------------------------------------------------*/ | |
1636 | ||
1637 | static int __init isp_init(void) | |
1638 | { | |
1639 | return i2c_add_driver(&isp1301_driver); | |
1640 | } | |
94a82487 | 1641 | subsys_initcall(isp_init); |
1da177e4 LT |
1642 | |
1643 | static void __exit isp_exit(void) | |
1644 | { | |
1645 | if (the_transceiver) | |
662dca54 | 1646 | usb_remove_phy(&the_transceiver->phy); |
1da177e4 LT |
1647 | i2c_del_driver(&isp1301_driver); |
1648 | } | |
1649 | module_exit(isp_exit); | |
1650 |