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96915234 MYK |
1 | /* |
2 | * drivers/usb/otg/ab8500_usb.c | |
3 | * | |
4 | * USB transceiver driver for AB8500 chip | |
5 | * | |
6 | * Copyright (C) 2010 ST-Ericsson AB | |
7 | * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/platform_device.h> | |
27 | #include <linux/usb/otg.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/notifier.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/mfd/abx500.h> | |
ee66e653 | 33 | #include <linux/mfd/abx500/ab8500.h> |
af6882be | 34 | #include <linux/usb/musb-ux500.h> |
e65b36c0 | 35 | #include <linux/regulator/consumer.h> |
96915234 | 36 | |
7124631a | 37 | /* Bank AB8500_SYS_CTRL2_BLOCK */ |
96915234 | 38 | #define AB8500_MAIN_WD_CTRL_REG 0x01 |
7124631a SB |
39 | |
40 | /* Bank AB8500_USB */ | |
96915234 | 41 | #define AB8500_USB_LINE_STAT_REG 0x80 |
af6882be | 42 | #define AB8505_USB_LINE_STAT_REG 0x94 |
96915234 MYK |
43 | #define AB8500_USB_PHY_CTRL_REG 0x8A |
44 | ||
7124631a SB |
45 | /* Bank AB8500_DEVELOPMENT */ |
46 | #define AB8500_BANK12_ACCESS 0x00 | |
47 | ||
48 | /* Bank AB8500_DEBUG */ | |
49 | #define AB8500_USB_PHY_TUNE1 0x05 | |
50 | #define AB8500_USB_PHY_TUNE2 0x06 | |
51 | #define AB8500_USB_PHY_TUNE3 0x07 | |
52 | ||
96915234 MYK |
53 | #define AB8500_BIT_OTG_STAT_ID (1 << 0) |
54 | #define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0) | |
55 | #define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1) | |
56 | #define AB8500_BIT_WD_CTRL_ENABLE (1 << 0) | |
57 | #define AB8500_BIT_WD_CTRL_KICK (1 << 1) | |
58 | ||
96915234 MYK |
59 | #define AB8500_WD_KICK_DELAY_US 100 /* usec */ |
60 | #define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */ | |
af6882be | 61 | #define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */ |
96915234 MYK |
62 | |
63 | /* Usb line status register */ | |
64 | enum ab8500_usb_link_status { | |
af6882be FB |
65 | USB_LINK_NOT_CONFIGURED_8500 = 0, |
66 | USB_LINK_STD_HOST_NC_8500, | |
67 | USB_LINK_STD_HOST_C_NS_8500, | |
68 | USB_LINK_STD_HOST_C_S_8500, | |
69 | USB_LINK_HOST_CHG_NM_8500, | |
70 | USB_LINK_HOST_CHG_HS_8500, | |
71 | USB_LINK_HOST_CHG_HS_CHIRP_8500, | |
72 | USB_LINK_DEDICATED_CHG_8500, | |
73 | USB_LINK_ACA_RID_A_8500, | |
74 | USB_LINK_ACA_RID_B_8500, | |
75 | USB_LINK_ACA_RID_C_NM_8500, | |
76 | USB_LINK_ACA_RID_C_HS_8500, | |
77 | USB_LINK_ACA_RID_C_HS_CHIRP_8500, | |
78 | USB_LINK_HM_IDGND_8500, | |
79 | USB_LINK_RESERVED_8500, | |
80 | USB_LINK_NOT_VALID_LINK_8500, | |
81 | }; | |
82 | ||
83 | enum ab8505_usb_link_status { | |
84 | USB_LINK_NOT_CONFIGURED_8505 = 0, | |
85 | USB_LINK_STD_HOST_NC_8505, | |
86 | USB_LINK_STD_HOST_C_NS_8505, | |
87 | USB_LINK_STD_HOST_C_S_8505, | |
88 | USB_LINK_CDP_8505, | |
89 | USB_LINK_RESERVED0_8505, | |
90 | USB_LINK_RESERVED1_8505, | |
91 | USB_LINK_DEDICATED_CHG_8505, | |
92 | USB_LINK_ACA_RID_A_8505, | |
93 | USB_LINK_ACA_RID_B_8505, | |
94 | USB_LINK_ACA_RID_C_NM_8505, | |
95 | USB_LINK_RESERVED2_8505, | |
96 | USB_LINK_RESERVED3_8505, | |
97 | USB_LINK_HM_IDGND_8505, | |
98 | USB_LINK_CHARGERPORT_NOT_OK_8505, | |
99 | USB_LINK_CHARGER_DM_HIGH_8505, | |
100 | USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505, | |
101 | USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505, | |
102 | USB_LINK_STD_UPSTREAM_8505, | |
103 | USB_LINK_CHARGER_SE1_8505, | |
104 | USB_LINK_CARKIT_CHGR_1_8505, | |
105 | USB_LINK_CARKIT_CHGR_2_8505, | |
106 | USB_LINK_ACA_DOCK_CHGR_8505, | |
107 | USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505, | |
108 | USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505, | |
109 | USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505, | |
110 | USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505, | |
111 | USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505, | |
112 | }; | |
113 | ||
114 | enum ab8500_usb_mode { | |
115 | USB_IDLE = 0, | |
116 | USB_PERIPHERAL, | |
117 | USB_HOST, | |
118 | USB_DEDICATED_CHG | |
96915234 MYK |
119 | }; |
120 | ||
121 | struct ab8500_usb { | |
144713f3 | 122 | struct usb_phy phy; |
96915234 | 123 | struct device *dev; |
73f226cb | 124 | struct ab8500 *ab8500; |
96915234 MYK |
125 | unsigned vbus_draw; |
126 | struct delayed_work dwork; | |
127 | struct work_struct phy_dis_work; | |
128 | unsigned long link_status_wait; | |
af6882be | 129 | enum ab8500_usb_mode mode; |
e65b36c0 FB |
130 | struct regulator *v_ape; |
131 | struct regulator *v_musb; | |
132 | struct regulator *v_ulpi; | |
af6882be | 133 | int previous_link_status_state; |
96915234 MYK |
134 | }; |
135 | ||
144713f3 | 136 | static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x) |
96915234 | 137 | { |
144713f3 | 138 | return container_of(x, struct ab8500_usb, phy); |
96915234 MYK |
139 | } |
140 | ||
141 | static void ab8500_usb_wd_workaround(struct ab8500_usb *ab) | |
142 | { | |
143 | abx500_set_register_interruptible(ab->dev, | |
144 | AB8500_SYS_CTRL2_BLOCK, | |
145 | AB8500_MAIN_WD_CTRL_REG, | |
146 | AB8500_BIT_WD_CTRL_ENABLE); | |
147 | ||
148 | udelay(AB8500_WD_KICK_DELAY_US); | |
149 | ||
150 | abx500_set_register_interruptible(ab->dev, | |
151 | AB8500_SYS_CTRL2_BLOCK, | |
152 | AB8500_MAIN_WD_CTRL_REG, | |
153 | (AB8500_BIT_WD_CTRL_ENABLE | |
154 | | AB8500_BIT_WD_CTRL_KICK)); | |
155 | ||
73f226cb | 156 | udelay(AB8500_WD_V11_DISABLE_DELAY_US); |
96915234 MYK |
157 | |
158 | abx500_set_register_interruptible(ab->dev, | |
159 | AB8500_SYS_CTRL2_BLOCK, | |
160 | AB8500_MAIN_WD_CTRL_REG, | |
161 | 0); | |
162 | } | |
163 | ||
af6882be FB |
164 | static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit) |
165 | { | |
166 | /* Workaround for v2.0 bug # 31952 */ | |
167 | if (is_ab8500_2p0(ab->ab8500)) { | |
168 | abx500_mask_and_set_register_interruptible(ab->dev, | |
169 | AB8500_USB, AB8500_USB_PHY_CTRL_REG, | |
170 | bit, bit); | |
171 | udelay(AB8500_V20_31952_DISABLE_DELAY_US); | |
172 | } | |
173 | } | |
174 | ||
96915234 MYK |
175 | static void ab8500_usb_phy_ctrl(struct ab8500_usb *ab, bool sel_host, |
176 | bool enable) | |
177 | { | |
178 | u8 ctrl_reg; | |
179 | abx500_get_register_interruptible(ab->dev, | |
180 | AB8500_USB, | |
181 | AB8500_USB_PHY_CTRL_REG, | |
182 | &ctrl_reg); | |
183 | if (sel_host) { | |
184 | if (enable) | |
185 | ctrl_reg |= AB8500_BIT_PHY_CTRL_HOST_EN; | |
186 | else | |
187 | ctrl_reg &= ~AB8500_BIT_PHY_CTRL_HOST_EN; | |
188 | } else { | |
189 | if (enable) | |
190 | ctrl_reg |= AB8500_BIT_PHY_CTRL_DEVICE_EN; | |
191 | else | |
192 | ctrl_reg &= ~AB8500_BIT_PHY_CTRL_DEVICE_EN; | |
193 | } | |
194 | ||
195 | abx500_set_register_interruptible(ab->dev, | |
196 | AB8500_USB, | |
197 | AB8500_USB_PHY_CTRL_REG, | |
198 | ctrl_reg); | |
199 | ||
200 | /* Needed to enable the phy.*/ | |
201 | if (enable) | |
202 | ab8500_usb_wd_workaround(ab); | |
203 | } | |
204 | ||
205 | #define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_ctrl(ab, true, true) | |
206 | #define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_ctrl(ab, true, false) | |
207 | #define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_ctrl(ab, false, true) | |
208 | #define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_ctrl(ab, false, false) | |
209 | ||
af6882be FB |
210 | static int ab8505_usb_link_status_update(struct ab8500_usb *ab, |
211 | enum ab8505_usb_link_status lsts) | |
96915234 | 212 | { |
af6882be | 213 | enum ux500_musb_vbus_id_status event = 0; |
96915234 | 214 | |
af6882be | 215 | dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts); |
96915234 | 216 | |
af6882be FB |
217 | /* |
218 | * Spurious link_status interrupts are seen at the time of | |
219 | * disconnection of a device in RIDA state | |
220 | */ | |
221 | if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 && | |
222 | (lsts == USB_LINK_STD_HOST_NC_8505)) | |
223 | return 0; | |
224 | ||
225 | ab->previous_link_status_state = lsts; | |
96915234 MYK |
226 | |
227 | switch (lsts) { | |
af6882be FB |
228 | case USB_LINK_ACA_RID_B_8505: |
229 | event = UX500_MUSB_RIDB; | |
230 | case USB_LINK_NOT_CONFIGURED_8505: | |
231 | case USB_LINK_RESERVED0_8505: | |
232 | case USB_LINK_RESERVED1_8505: | |
233 | case USB_LINK_RESERVED2_8505: | |
234 | case USB_LINK_RESERVED3_8505: | |
235 | ab->mode = USB_IDLE; | |
144713f3 | 236 | ab->phy.otg->default_a = false; |
96915234 | 237 | ab->vbus_draw = 0; |
af6882be FB |
238 | if (event != UX500_MUSB_RIDB) |
239 | event = UX500_MUSB_NONE; | |
240 | /* | |
241 | * Fallback to default B_IDLE as nothing | |
242 | * is connected | |
243 | */ | |
244 | ab->phy.state = OTG_STATE_B_IDLE; | |
96915234 MYK |
245 | break; |
246 | ||
af6882be FB |
247 | case USB_LINK_ACA_RID_C_NM_8505: |
248 | event = UX500_MUSB_RIDC; | |
249 | case USB_LINK_STD_HOST_NC_8505: | |
250 | case USB_LINK_STD_HOST_C_NS_8505: | |
251 | case USB_LINK_STD_HOST_C_S_8505: | |
252 | case USB_LINK_CDP_8505: | |
253 | if (ab->mode == USB_IDLE) { | |
254 | ab->mode = USB_PERIPHERAL; | |
96915234 | 255 | ab8500_usb_peri_phy_en(ab); |
af6882be FB |
256 | atomic_notifier_call_chain(&ab->phy.notifier, |
257 | UX500_MUSB_PREPARE, &ab->vbus_draw); | |
96915234 | 258 | } |
af6882be FB |
259 | if (event != UX500_MUSB_RIDC) |
260 | event = UX500_MUSB_VBUS; | |
96915234 MYK |
261 | break; |
262 | ||
af6882be FB |
263 | case USB_LINK_ACA_RID_A_8505: |
264 | case USB_LINK_ACA_DOCK_CHGR_8505: | |
265 | event = UX500_MUSB_RIDA; | |
266 | case USB_LINK_HM_IDGND_8505: | |
267 | if (ab->mode == USB_IDLE) { | |
268 | ab->mode = USB_HOST; | |
96915234 | 269 | ab8500_usb_host_phy_en(ab); |
af6882be FB |
270 | atomic_notifier_call_chain(&ab->phy.notifier, |
271 | UX500_MUSB_PREPARE, &ab->vbus_draw); | |
96915234 | 272 | } |
144713f3 | 273 | ab->phy.otg->default_a = true; |
af6882be FB |
274 | if (event != UX500_MUSB_RIDA) |
275 | event = UX500_MUSB_ID; | |
276 | atomic_notifier_call_chain(&ab->phy.notifier, | |
277 | event, &ab->vbus_draw); | |
96915234 MYK |
278 | break; |
279 | ||
af6882be FB |
280 | case USB_LINK_DEDICATED_CHG_8505: |
281 | ab->mode = USB_DEDICATED_CHG; | |
282 | event = UX500_MUSB_CHARGER; | |
283 | atomic_notifier_call_chain(&ab->phy.notifier, | |
284 | event, &ab->vbus_draw); | |
285 | break; | |
286 | ||
287 | default: | |
96915234 MYK |
288 | break; |
289 | } | |
290 | ||
af6882be FB |
291 | return 0; |
292 | } | |
293 | ||
294 | static int ab8500_usb_link_status_update(struct ab8500_usb *ab, | |
295 | enum ab8500_usb_link_status lsts) | |
296 | { | |
297 | enum ux500_musb_vbus_id_status event = 0; | |
298 | ||
299 | dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts); | |
300 | ||
301 | /* | |
302 | * Spurious link_status interrupts are seen in case of a | |
303 | * disconnection of a device in IDGND and RIDA stage | |
304 | */ | |
305 | if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 && | |
306 | (lsts == USB_LINK_STD_HOST_C_NS_8500 || | |
307 | lsts == USB_LINK_STD_HOST_NC_8500)) | |
308 | return 0; | |
309 | ||
310 | if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 && | |
311 | lsts == USB_LINK_STD_HOST_NC_8500) | |
312 | return 0; | |
313 | ||
314 | ab->previous_link_status_state = lsts; | |
315 | ||
316 | switch (lsts) { | |
317 | case USB_LINK_ACA_RID_B_8500: | |
318 | event = UX500_MUSB_RIDB; | |
319 | case USB_LINK_NOT_CONFIGURED_8500: | |
320 | case USB_LINK_NOT_VALID_LINK_8500: | |
321 | ab->mode = USB_IDLE; | |
322 | ab->phy.otg->default_a = false; | |
323 | ab->vbus_draw = 0; | |
324 | if (event != UX500_MUSB_RIDB) | |
325 | event = UX500_MUSB_NONE; | |
326 | /* Fallback to default B_IDLE as nothing is connected */ | |
327 | ab->phy.state = OTG_STATE_B_IDLE; | |
328 | break; | |
329 | ||
330 | case USB_LINK_ACA_RID_C_NM_8500: | |
331 | case USB_LINK_ACA_RID_C_HS_8500: | |
332 | case USB_LINK_ACA_RID_C_HS_CHIRP_8500: | |
333 | event = UX500_MUSB_RIDC; | |
334 | case USB_LINK_STD_HOST_NC_8500: | |
335 | case USB_LINK_STD_HOST_C_NS_8500: | |
336 | case USB_LINK_STD_HOST_C_S_8500: | |
337 | case USB_LINK_HOST_CHG_NM_8500: | |
338 | case USB_LINK_HOST_CHG_HS_8500: | |
339 | case USB_LINK_HOST_CHG_HS_CHIRP_8500: | |
340 | if (ab->mode == USB_IDLE) { | |
341 | ab->mode = USB_PERIPHERAL; | |
342 | ab8500_usb_peri_phy_en(ab); | |
343 | atomic_notifier_call_chain(&ab->phy.notifier, | |
344 | UX500_MUSB_PREPARE, &ab->vbus_draw); | |
345 | } | |
346 | if (event != UX500_MUSB_RIDC) | |
347 | event = UX500_MUSB_VBUS; | |
348 | break; | |
349 | ||
350 | case USB_LINK_ACA_RID_A_8500: | |
351 | event = UX500_MUSB_RIDA; | |
352 | case USB_LINK_HM_IDGND_8500: | |
353 | if (ab->mode == USB_IDLE) { | |
354 | ab->mode = USB_HOST; | |
355 | ab8500_usb_host_phy_en(ab); | |
356 | atomic_notifier_call_chain(&ab->phy.notifier, | |
357 | UX500_MUSB_PREPARE, &ab->vbus_draw); | |
358 | } | |
359 | ab->phy.otg->default_a = true; | |
360 | if (event != UX500_MUSB_RIDA) | |
361 | event = UX500_MUSB_ID; | |
362 | atomic_notifier_call_chain(&ab->phy.notifier, | |
363 | event, &ab->vbus_draw); | |
364 | break; | |
365 | ||
366 | case USB_LINK_DEDICATED_CHG_8500: | |
367 | ab->mode = USB_DEDICATED_CHG; | |
368 | event = UX500_MUSB_CHARGER; | |
369 | atomic_notifier_call_chain(&ab->phy.notifier, | |
370 | event, &ab->vbus_draw); | |
371 | break; | |
372 | ||
373 | case USB_LINK_RESERVED_8500: | |
374 | break; | |
375 | } | |
96915234 MYK |
376 | |
377 | return 0; | |
378 | } | |
379 | ||
af6882be FB |
380 | /* |
381 | * Connection Sequence: | |
382 | * 1. Link Status Interrupt | |
383 | * 2. Enable AB clock | |
384 | * 3. Enable AB regulators | |
385 | * 4. Enable USB phy | |
386 | * 5. Reset the musb controller | |
387 | * 6. Switch the ULPI GPIO pins to fucntion mode | |
388 | * 7. Enable the musb Peripheral5 clock | |
389 | * 8. Restore MUSB context | |
390 | */ | |
391 | static int abx500_usb_link_status_update(struct ab8500_usb *ab) | |
96915234 | 392 | { |
af6882be FB |
393 | u8 reg; |
394 | int ret = 0; | |
395 | ||
396 | if (is_ab8500(ab->ab8500)) { | |
397 | enum ab8500_usb_link_status lsts; | |
398 | ||
399 | abx500_get_register_interruptible(ab->dev, | |
400 | AB8500_USB, AB8500_USB_LINE_STAT_REG, ®); | |
401 | lsts = (reg >> 3) & 0x0F; | |
402 | ret = ab8500_usb_link_status_update(ab, lsts); | |
403 | } else if (is_ab8505(ab->ab8500)) { | |
404 | enum ab8505_usb_link_status lsts; | |
405 | ||
406 | abx500_get_register_interruptible(ab->dev, | |
407 | AB8500_USB, AB8505_USB_LINE_STAT_REG, ®); | |
408 | lsts = (reg >> 3) & 0x1F; | |
409 | ret = ab8505_usb_link_status_update(ab, lsts); | |
410 | } | |
411 | ||
412 | return ret; | |
413 | } | |
414 | ||
415 | /* | |
416 | * Disconnection Sequence: | |
417 | * 1. Disconect Interrupt | |
418 | * 2. Disable regulators | |
419 | * 3. Disable AB clock | |
420 | * 4. Disable the Phy | |
421 | * 5. Link Status Interrupt | |
422 | * 6. Disable Musb Clock | |
423 | */ | |
424 | static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data) | |
425 | { | |
426 | struct ab8500_usb *ab = (struct ab8500_usb *) data; | |
427 | enum usb_phy_events event = UX500_MUSB_NONE; | |
428 | ||
429 | /* Link status will not be updated till phy is disabled. */ | |
430 | if (ab->mode == USB_HOST) { | |
431 | ab->phy.otg->default_a = false; | |
432 | ab->vbus_draw = 0; | |
433 | atomic_notifier_call_chain(&ab->phy.notifier, | |
434 | event, &ab->vbus_draw); | |
435 | ab8500_usb_host_phy_dis(ab); | |
436 | ab->mode = USB_IDLE; | |
437 | } | |
438 | ||
439 | if (ab->mode == USB_PERIPHERAL) { | |
440 | atomic_notifier_call_chain(&ab->phy.notifier, | |
441 | event, &ab->vbus_draw); | |
442 | ab8500_usb_peri_phy_dis(ab); | |
443 | atomic_notifier_call_chain(&ab->phy.notifier, | |
444 | UX500_MUSB_CLEAN, &ab->vbus_draw); | |
445 | ab->mode = USB_IDLE; | |
446 | ab->phy.otg->default_a = false; | |
447 | ab->vbus_draw = 0; | |
448 | } | |
449 | ||
450 | if (is_ab8500_2p0(ab->ab8500)) { | |
451 | if (ab->mode == USB_DEDICATED_CHG) { | |
452 | ab8500_usb_wd_linkstatus(ab, | |
453 | AB8500_BIT_PHY_CTRL_DEVICE_EN); | |
454 | abx500_mask_and_set_register_interruptible(ab->dev, | |
455 | AB8500_USB, AB8500_USB_PHY_CTRL_REG, | |
456 | AB8500_BIT_PHY_CTRL_DEVICE_EN, 0); | |
457 | } | |
458 | } | |
96915234 | 459 | |
af6882be | 460 | return IRQ_HANDLED; |
96915234 MYK |
461 | } |
462 | ||
af6882be | 463 | static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data) |
96915234 MYK |
464 | { |
465 | struct ab8500_usb *ab = (struct ab8500_usb *) data; | |
466 | ||
af6882be | 467 | abx500_usb_link_status_update(ab); |
96915234 MYK |
468 | |
469 | return IRQ_HANDLED; | |
470 | } | |
471 | ||
af6882be FB |
472 | static void ab8500_usb_delayed_work(struct work_struct *work) |
473 | { | |
474 | struct ab8500_usb *ab = container_of(work, struct ab8500_usb, | |
475 | dwork.work); | |
476 | ||
477 | abx500_usb_link_status_update(ab); | |
478 | } | |
479 | ||
96915234 MYK |
480 | static void ab8500_usb_phy_disable_work(struct work_struct *work) |
481 | { | |
482 | struct ab8500_usb *ab = container_of(work, struct ab8500_usb, | |
483 | phy_dis_work); | |
484 | ||
144713f3 | 485 | if (!ab->phy.otg->host) |
96915234 MYK |
486 | ab8500_usb_host_phy_dis(ab); |
487 | ||
144713f3 | 488 | if (!ab->phy.otg->gadget) |
96915234 MYK |
489 | ab8500_usb_peri_phy_dis(ab); |
490 | } | |
491 | ||
c2a0ab6b SB |
492 | static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA) |
493 | { | |
494 | /* | |
495 | * AB8500 V2 has eye diagram issues when drawing more than 100mA from | |
496 | * VBUS. Set charging current to 100mA in case of standard host | |
497 | */ | |
498 | if (is_ab8500_2p0_or_earlier(ab->ab8500)) | |
499 | if (mA > 100) | |
500 | mA = 100; | |
501 | ||
502 | return mA; | |
503 | } | |
504 | ||
144713f3 | 505 | static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA) |
96915234 MYK |
506 | { |
507 | struct ab8500_usb *ab; | |
508 | ||
144713f3 | 509 | if (!phy) |
96915234 MYK |
510 | return -ENODEV; |
511 | ||
144713f3 | 512 | ab = phy_to_ab(phy); |
96915234 | 513 | |
c2a0ab6b SB |
514 | mA = ab8500_eyediagram_workaroud(ab, mA); |
515 | ||
96915234 MYK |
516 | ab->vbus_draw = mA; |
517 | ||
518 | if (mA) | |
144713f3 | 519 | atomic_notifier_call_chain(&ab->phy.notifier, |
af6882be | 520 | UX500_MUSB_ENUMERATED, ab->phy.otg->gadget); |
96915234 MYK |
521 | return 0; |
522 | } | |
523 | ||
524 | /* TODO: Implement some way for charging or other drivers to read | |
525 | * ab->vbus_draw. | |
526 | */ | |
527 | ||
86753811 | 528 | static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend) |
96915234 MYK |
529 | { |
530 | /* TODO */ | |
531 | return 0; | |
532 | } | |
533 | ||
144713f3 HK |
534 | static int ab8500_usb_set_peripheral(struct usb_otg *otg, |
535 | struct usb_gadget *gadget) | |
96915234 MYK |
536 | { |
537 | struct ab8500_usb *ab; | |
538 | ||
539 | if (!otg) | |
540 | return -ENODEV; | |
541 | ||
144713f3 | 542 | ab = phy_to_ab(otg->phy); |
96915234 MYK |
543 | |
544 | /* Some drivers call this function in atomic context. | |
545 | * Do not update ab8500 registers directly till this | |
546 | * is fixed. | |
547 | */ | |
548 | ||
549 | if (!gadget) { | |
550 | /* TODO: Disable regulators. */ | |
144713f3 | 551 | otg->gadget = NULL; |
96915234 MYK |
552 | schedule_work(&ab->phy_dis_work); |
553 | } else { | |
144713f3 HK |
554 | otg->gadget = gadget; |
555 | otg->phy->state = OTG_STATE_B_IDLE; | |
96915234 MYK |
556 | |
557 | /* Phy will not be enabled if cable is already | |
558 | * plugged-in. Schedule to enable phy. | |
559 | * Use same delay to avoid any race condition. | |
560 | */ | |
561 | schedule_delayed_work(&ab->dwork, ab->link_status_wait); | |
562 | } | |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
144713f3 | 567 | static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host) |
96915234 MYK |
568 | { |
569 | struct ab8500_usb *ab; | |
570 | ||
571 | if (!otg) | |
572 | return -ENODEV; | |
573 | ||
144713f3 | 574 | ab = phy_to_ab(otg->phy); |
96915234 MYK |
575 | |
576 | /* Some drivers call this function in atomic context. | |
577 | * Do not update ab8500 registers directly till this | |
578 | * is fixed. | |
579 | */ | |
580 | ||
581 | if (!host) { | |
582 | /* TODO: Disable regulators. */ | |
144713f3 | 583 | otg->host = NULL; |
96915234 MYK |
584 | schedule_work(&ab->phy_dis_work); |
585 | } else { | |
144713f3 | 586 | otg->host = host; |
96915234 MYK |
587 | /* Phy will not be enabled if cable is already |
588 | * plugged-in. Schedule to enable phy. | |
589 | * Use same delay to avoid any race condition. | |
590 | */ | |
591 | schedule_delayed_work(&ab->dwork, ab->link_status_wait); | |
592 | } | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
e65b36c0 FB |
597 | static int ab8500_usb_regulator_get(struct ab8500_usb *ab) |
598 | { | |
599 | int err; | |
600 | ||
601 | ab->v_ape = devm_regulator_get(ab->dev, "v-ape"); | |
602 | if (IS_ERR(ab->v_ape)) { | |
603 | dev_err(ab->dev, "Could not get v-ape supply\n"); | |
604 | err = PTR_ERR(ab->v_ape); | |
605 | return err; | |
606 | } | |
607 | ||
608 | ab->v_ulpi = devm_regulator_get(ab->dev, "vddulpivio18"); | |
609 | if (IS_ERR(ab->v_ulpi)) { | |
610 | dev_err(ab->dev, "Could not get vddulpivio18 supply\n"); | |
611 | err = PTR_ERR(ab->v_ulpi); | |
612 | return err; | |
613 | } | |
614 | ||
615 | ab->v_musb = devm_regulator_get(ab->dev, "musb_1v8"); | |
616 | if (IS_ERR(ab->v_musb)) { | |
617 | dev_err(ab->dev, "Could not get musb_1v8 supply\n"); | |
618 | err = PTR_ERR(ab->v_musb); | |
619 | return err; | |
620 | } | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
af6882be FB |
625 | static int ab8500_usb_irq_setup(struct platform_device *pdev, |
626 | struct ab8500_usb *ab) | |
96915234 MYK |
627 | { |
628 | int err; | |
af6882be | 629 | int irq; |
96915234 | 630 | |
af6882be FB |
631 | irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS"); |
632 | if (irq < 0) { | |
96915234 | 633 | dev_err(&pdev->dev, "Link status irq not found\n"); |
af6882be FB |
634 | return irq; |
635 | } | |
636 | err = devm_request_threaded_irq(&pdev->dev, irq, NULL, | |
637 | ab8500_usb_link_status_irq, | |
638 | IRQF_NO_SUSPEND | IRQF_SHARED, "usb-link-status", ab); | |
639 | if (err < 0) { | |
640 | dev_err(ab->dev, "request_irq failed for link status irq\n"); | |
641 | return err; | |
96915234 MYK |
642 | } |
643 | ||
af6882be FB |
644 | irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F"); |
645 | if (irq < 0) { | |
646 | dev_err(&pdev->dev, "ID fall irq not found\n"); | |
647 | return irq; | |
648 | } | |
649 | err = devm_request_threaded_irq(&pdev->dev, irq, NULL, | |
650 | ab8500_usb_disconnect_irq, | |
651 | IRQF_NO_SUSPEND | IRQF_SHARED, "usb-id-fall", ab); | |
96915234 | 652 | if (err < 0) { |
af6882be FB |
653 | dev_err(ab->dev, "request_irq failed for ID fall irq\n"); |
654 | return err; | |
655 | } | |
656 | ||
657 | irq = platform_get_irq_byname(pdev, "VBUS_DET_F"); | |
658 | if (irq < 0) { | |
659 | dev_err(&pdev->dev, "VBUS fall irq not found\n"); | |
660 | return irq; | |
661 | } | |
662 | err = devm_request_threaded_irq(&pdev->dev, irq, NULL, | |
663 | ab8500_usb_disconnect_irq, | |
664 | IRQF_NO_SUSPEND | IRQF_SHARED, "usb-vbus-fall", ab); | |
665 | if (err < 0) { | |
666 | dev_err(ab->dev, "request_irq failed for Vbus fall irq\n"); | |
96915234 MYK |
667 | return err; |
668 | } | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
41ac7b3a | 673 | static int ab8500_usb_probe(struct platform_device *pdev) |
96915234 MYK |
674 | { |
675 | struct ab8500_usb *ab; | |
73f226cb | 676 | struct ab8500 *ab8500; |
144713f3 | 677 | struct usb_otg *otg; |
96915234 MYK |
678 | int err; |
679 | int rev; | |
680 | ||
73f226cb | 681 | ab8500 = dev_get_drvdata(pdev->dev.parent); |
96915234 | 682 | rev = abx500_get_chip_id(&pdev->dev); |
73f226cb FB |
683 | |
684 | if (is_ab8500_1p1_or_earlier(ab8500)) { | |
685 | dev_err(&pdev->dev, "Unsupported AB8500 chip rev=%d\n", rev); | |
96915234 MYK |
686 | return -ENODEV; |
687 | } | |
688 | ||
81ef6724 | 689 | ab = devm_kzalloc(&pdev->dev, sizeof(*ab), GFP_KERNEL); |
96915234 MYK |
690 | if (!ab) |
691 | return -ENOMEM; | |
692 | ||
81ef6724 FB |
693 | otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); |
694 | if (!otg) | |
144713f3 | 695 | return -ENOMEM; |
144713f3 | 696 | |
96915234 | 697 | ab->dev = &pdev->dev; |
73f226cb | 698 | ab->ab8500 = ab8500; |
144713f3 HK |
699 | ab->phy.dev = ab->dev; |
700 | ab->phy.otg = otg; | |
701 | ab->phy.label = "ab8500"; | |
702 | ab->phy.set_suspend = ab8500_usb_set_suspend; | |
703 | ab->phy.set_power = ab8500_usb_set_power; | |
704 | ab->phy.state = OTG_STATE_UNDEFINED; | |
705 | ||
706 | otg->phy = &ab->phy; | |
707 | otg->set_host = ab8500_usb_set_host; | |
708 | otg->set_peripheral = ab8500_usb_set_peripheral; | |
96915234 MYK |
709 | |
710 | platform_set_drvdata(pdev, ab); | |
711 | ||
144713f3 | 712 | ATOMIC_INIT_NOTIFIER_HEAD(&ab->phy.notifier); |
96915234 MYK |
713 | |
714 | /* v1: Wait for link status to become stable. | |
715 | * all: Updates form set_host and set_peripheral as they are atomic. | |
716 | */ | |
717 | INIT_DELAYED_WORK(&ab->dwork, ab8500_usb_delayed_work); | |
718 | ||
719 | /* all: Disable phy when called from set_host and set_peripheral */ | |
720 | INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work); | |
721 | ||
e65b36c0 FB |
722 | err = ab8500_usb_regulator_get(ab); |
723 | if (err) | |
724 | return err; | |
725 | ||
af6882be | 726 | err = ab8500_usb_irq_setup(pdev, ab); |
96915234 | 727 | if (err < 0) |
81ef6724 | 728 | return err; |
96915234 | 729 | |
662dca54 | 730 | err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2); |
96915234 MYK |
731 | if (err) { |
732 | dev_err(&pdev->dev, "Can't register transceiver\n"); | |
81ef6724 | 733 | return err; |
96915234 MYK |
734 | } |
735 | ||
7124631a SB |
736 | /* Phy tuning values for AB8500 */ |
737 | if (!is_ab8500_2p0_or_earlier(ab->ab8500)) { | |
738 | /* Enable the PBT/Bank 0x12 access */ | |
739 | err = abx500_set_register_interruptible(ab->dev, | |
740 | AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01); | |
741 | if (err < 0) | |
742 | dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", | |
743 | err); | |
744 | ||
745 | err = abx500_set_register_interruptible(ab->dev, | |
746 | AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8); | |
747 | if (err < 0) | |
748 | dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", | |
749 | err); | |
750 | ||
751 | err = abx500_set_register_interruptible(ab->dev, | |
752 | AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00); | |
753 | if (err < 0) | |
754 | dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", | |
755 | err); | |
756 | ||
757 | err = abx500_set_register_interruptible(ab->dev, | |
758 | AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78); | |
759 | if (err < 0) | |
760 | dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n", | |
761 | err); | |
762 | ||
763 | /* Switch to normal mode/disable Bank 0x12 access */ | |
764 | err = abx500_set_register_interruptible(ab->dev, | |
765 | AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00); | |
766 | if (err < 0) | |
767 | dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", | |
768 | err); | |
769 | } | |
770 | ||
771 | /* Phy tuning values for AB8505 */ | |
772 | if (is_ab8505(ab->ab8500)) { | |
773 | /* Enable the PBT/Bank 0x12 access */ | |
774 | err = abx500_mask_and_set_register_interruptible(ab->dev, | |
775 | AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, | |
776 | 0x01, 0x01); | |
777 | if (err < 0) | |
778 | dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", | |
779 | err); | |
780 | ||
781 | err = abx500_mask_and_set_register_interruptible(ab->dev, | |
782 | AB8500_DEBUG, AB8500_USB_PHY_TUNE1, | |
783 | 0xC8, 0xC8); | |
784 | if (err < 0) | |
785 | dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", | |
786 | err); | |
787 | ||
788 | err = abx500_mask_and_set_register_interruptible(ab->dev, | |
789 | AB8500_DEBUG, AB8500_USB_PHY_TUNE2, | |
790 | 0x60, 0x60); | |
791 | if (err < 0) | |
792 | dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", | |
793 | err); | |
794 | ||
795 | err = abx500_mask_and_set_register_interruptible(ab->dev, | |
796 | AB8500_DEBUG, AB8500_USB_PHY_TUNE3, | |
797 | 0xFC, 0x80); | |
798 | ||
799 | if (err < 0) | |
800 | dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n", | |
801 | err); | |
802 | ||
803 | /* Switch to normal mode/disable Bank 0x12 access */ | |
804 | err = abx500_mask_and_set_register_interruptible(ab->dev, | |
805 | AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, | |
806 | 0x00, 0x00); | |
807 | if (err < 0) | |
808 | dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", | |
809 | err); | |
810 | } | |
811 | ||
af6882be FB |
812 | /* Needed to enable ID detection. */ |
813 | ab8500_usb_wd_workaround(ab); | |
814 | ||
73f226cb | 815 | dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev); |
96915234 MYK |
816 | |
817 | return 0; | |
96915234 MYK |
818 | } |
819 | ||
fb4e98ab | 820 | static int ab8500_usb_remove(struct platform_device *pdev) |
96915234 MYK |
821 | { |
822 | struct ab8500_usb *ab = platform_get_drvdata(pdev); | |
823 | ||
96915234 MYK |
824 | cancel_delayed_work_sync(&ab->dwork); |
825 | ||
826 | cancel_work_sync(&ab->phy_dis_work); | |
827 | ||
662dca54 | 828 | usb_remove_phy(&ab->phy); |
96915234 MYK |
829 | |
830 | ab8500_usb_host_phy_dis(ab); | |
831 | ab8500_usb_peri_phy_dis(ab); | |
832 | ||
833 | platform_set_drvdata(pdev, NULL); | |
834 | ||
96915234 MYK |
835 | return 0; |
836 | } | |
837 | ||
838 | static struct platform_driver ab8500_usb_driver = { | |
839 | .probe = ab8500_usb_probe, | |
7690417d | 840 | .remove = ab8500_usb_remove, |
96915234 MYK |
841 | .driver = { |
842 | .name = "ab8500-usb", | |
843 | .owner = THIS_MODULE, | |
844 | }, | |
845 | }; | |
846 | ||
847 | static int __init ab8500_usb_init(void) | |
848 | { | |
849 | return platform_driver_register(&ab8500_usb_driver); | |
850 | } | |
851 | subsys_initcall(ab8500_usb_init); | |
852 | ||
853 | static void __exit ab8500_usb_exit(void) | |
854 | { | |
855 | platform_driver_unregister(&ab8500_usb_driver); | |
856 | } | |
857 | module_exit(ab8500_usb_exit); | |
858 | ||
859 | MODULE_ALIAS("platform:ab8500_usb"); | |
860 | MODULE_AUTHOR("ST-Ericsson AB"); | |
861 | MODULE_DESCRIPTION("AB8500 usb transceiver driver"); | |
862 | MODULE_LICENSE("GPL"); |