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9ebd9616 DB |
1 | /* |
2 | * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller | |
3 | * | |
4 | * Copyright (C) 2004-2007 Texas Instruments | |
5 | * Copyright (C) 2008 Nokia Corporation | |
6 | * Contact: Felipe Balbi <felipe.balbi@nokia.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | * Current status: | |
23 | * - HS USB ULPI mode works. | |
24 | * - 3-pin mode support may be added in future. | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/workqueue.h> | |
33 | #include <linux/io.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/usb/otg.h> | |
92a6e6b3 | 36 | #include <linux/usb/ulpi.h> |
b07682b6 | 37 | #include <linux/i2c/twl.h> |
66760169 JH |
38 | #include <linux/regulator/consumer.h> |
39 | #include <linux/err.h> | |
d1b5b5c0 | 40 | #include <linux/notifier.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
9ebd9616 DB |
42 | |
43 | /* Register defines */ | |
44 | ||
9ebd9616 | 45 | #define MCPC_CTRL 0x30 |
9ebd9616 DB |
46 | #define MCPC_CTRL_RTSOL (1 << 7) |
47 | #define MCPC_CTRL_EXTSWR (1 << 6) | |
48 | #define MCPC_CTRL_EXTSWC (1 << 5) | |
49 | #define MCPC_CTRL_VOICESW (1 << 4) | |
50 | #define MCPC_CTRL_OUT64K (1 << 3) | |
51 | #define MCPC_CTRL_RTSCTSSW (1 << 2) | |
52 | #define MCPC_CTRL_HS_UART (1 << 0) | |
53 | ||
54 | #define MCPC_IO_CTRL 0x33 | |
9ebd9616 DB |
55 | #define MCPC_IO_CTRL_MICBIASEN (1 << 5) |
56 | #define MCPC_IO_CTRL_CTS_NPU (1 << 4) | |
57 | #define MCPC_IO_CTRL_RXD_PU (1 << 3) | |
58 | #define MCPC_IO_CTRL_TXDTYP (1 << 2) | |
59 | #define MCPC_IO_CTRL_CTSTYP (1 << 1) | |
60 | #define MCPC_IO_CTRL_RTSTYP (1 << 0) | |
61 | ||
62 | #define MCPC_CTRL2 0x36 | |
9ebd9616 DB |
63 | #define MCPC_CTRL2_MCPC_CK_EN (1 << 0) |
64 | ||
65 | #define OTHER_FUNC_CTRL 0x80 | |
9ebd9616 DB |
66 | #define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4) |
67 | #define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2) | |
68 | ||
69 | #define OTHER_IFC_CTRL 0x83 | |
9ebd9616 DB |
70 | #define OTHER_IFC_CTRL_OE_INT_EN (1 << 6) |
71 | #define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5) | |
72 | #define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4) | |
73 | #define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3) | |
74 | #define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2) | |
75 | #define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0) | |
76 | ||
77 | #define OTHER_INT_EN_RISE 0x86 | |
9ebd9616 | 78 | #define OTHER_INT_EN_FALL 0x89 |
9ebd9616 DB |
79 | #define OTHER_INT_STS 0x8C |
80 | #define OTHER_INT_LATCH 0x8D | |
81 | #define OTHER_INT_VB_SESS_VLD (1 << 7) | |
82 | #define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */ | |
83 | #define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */ | |
84 | #define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */ | |
85 | #define OTHER_INT_MANU (1 << 1) | |
86 | #define OTHER_INT_ABNORMAL_STRESS (1 << 0) | |
87 | ||
88 | #define ID_STATUS 0x96 | |
89 | #define ID_RES_FLOAT (1 << 4) | |
90 | #define ID_RES_440K (1 << 3) | |
91 | #define ID_RES_200K (1 << 2) | |
92 | #define ID_RES_102K (1 << 1) | |
93 | #define ID_RES_GND (1 << 0) | |
94 | ||
95 | #define POWER_CTRL 0xAC | |
9ebd9616 DB |
96 | #define POWER_CTRL_OTG_ENAB (1 << 5) |
97 | ||
98 | #define OTHER_IFC_CTRL2 0xAF | |
9ebd9616 DB |
99 | #define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4) |
100 | #define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3) | |
101 | #define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2) | |
102 | #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */ | |
103 | #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0) | |
104 | #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0) | |
105 | ||
106 | #define REG_CTRL_EN 0xB2 | |
9ebd9616 DB |
107 | #define REG_CTRL_ERROR 0xB5 |
108 | #define ULPI_I2C_CONFLICT_INTEN (1 << 0) | |
109 | ||
110 | #define OTHER_FUNC_CTRL2 0xB8 | |
9ebd9616 DB |
111 | #define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0) |
112 | ||
113 | /* following registers do not have separate _clr and _set registers */ | |
114 | #define VBUS_DEBOUNCE 0xC0 | |
115 | #define ID_DEBOUNCE 0xC1 | |
116 | #define VBAT_TIMER 0xD3 | |
117 | #define PHY_PWR_CTRL 0xFD | |
118 | #define PHY_PWR_PHYPWD (1 << 0) | |
119 | #define PHY_CLK_CTRL 0xFE | |
120 | #define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2) | |
121 | #define PHY_CLK_CTRL_CLK32K_EN (1 << 1) | |
122 | #define REQ_PHY_DPLL_CLK (1 << 0) | |
123 | #define PHY_CLK_CTRL_STS 0xFF | |
124 | #define PHY_DPLL_CLK (1 << 0) | |
125 | ||
126 | /* In module TWL4030_MODULE_PM_MASTER */ | |
def6f8b9 | 127 | #define STS_HW_CONDITIONS 0x0F |
9ebd9616 DB |
128 | |
129 | /* In module TWL4030_MODULE_PM_RECEIVER */ | |
130 | #define VUSB_DEDICATED1 0x7D | |
131 | #define VUSB_DEDICATED2 0x7E | |
132 | #define VUSB1V5_DEV_GRP 0x71 | |
133 | #define VUSB1V5_TYPE 0x72 | |
134 | #define VUSB1V5_REMAP 0x73 | |
135 | #define VUSB1V8_DEV_GRP 0x74 | |
136 | #define VUSB1V8_TYPE 0x75 | |
137 | #define VUSB1V8_REMAP 0x76 | |
138 | #define VUSB3V1_DEV_GRP 0x77 | |
139 | #define VUSB3V1_TYPE 0x78 | |
140 | #define VUSB3V1_REMAP 0x79 | |
141 | ||
142 | /* In module TWL4030_MODULE_INTBR */ | |
143 | #define PMBR1 0x0D | |
144 | #define GPIO_USB_4PIN_ULPI_2430C (3 << 0) | |
145 | ||
9ebd9616 | 146 | struct twl4030_usb { |
86753811 | 147 | struct usb_phy otg; |
9ebd9616 DB |
148 | struct device *dev; |
149 | ||
66760169 JH |
150 | /* TWL4030 internal USB regulator supplies */ |
151 | struct regulator *usb1v5; | |
152 | struct regulator *usb1v8; | |
153 | struct regulator *usb3v1; | |
154 | ||
9ebd9616 DB |
155 | /* for vbus reporting with irqs disabled */ |
156 | spinlock_t lock; | |
157 | ||
158 | /* pin configuration */ | |
159 | enum twl4030_usb_mode usb_mode; | |
160 | ||
161 | int irq; | |
162 | u8 linkstat; | |
a87103a6 | 163 | bool vbus_supplied; |
9ebd9616 DB |
164 | u8 asleep; |
165 | bool irq_enabled; | |
166 | }; | |
167 | ||
168 | /* internal define on top of container_of */ | |
497888cf | 169 | #define xceiv_to_twl(x) container_of((x), struct twl4030_usb, otg) |
9ebd9616 DB |
170 | |
171 | /*-------------------------------------------------------------------------*/ | |
172 | ||
173 | static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl, | |
174 | u8 module, u8 data, u8 address) | |
175 | { | |
176 | u8 check; | |
177 | ||
fc7b92fc B |
178 | if ((twl_i2c_write_u8(module, data, address) >= 0) && |
179 | (twl_i2c_read_u8(module, &check, address) >= 0) && | |
9ebd9616 DB |
180 | (check == data)) |
181 | return 0; | |
182 | dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", | |
183 | 1, module, address, check, data); | |
184 | ||
185 | /* Failed once: Try again */ | |
fc7b92fc B |
186 | if ((twl_i2c_write_u8(module, data, address) >= 0) && |
187 | (twl_i2c_read_u8(module, &check, address) >= 0) && | |
9ebd9616 DB |
188 | (check == data)) |
189 | return 0; | |
190 | dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", | |
191 | 2, module, address, check, data); | |
192 | ||
193 | /* Failed again: Return error */ | |
194 | return -EBUSY; | |
195 | } | |
196 | ||
197 | #define twl4030_usb_write_verify(twl, address, data) \ | |
198 | twl4030_i2c_write_u8_verify(twl, TWL4030_MODULE_USB, (data), (address)) | |
199 | ||
200 | static inline int twl4030_usb_write(struct twl4030_usb *twl, | |
201 | u8 address, u8 data) | |
202 | { | |
203 | int ret = 0; | |
204 | ||
fc7b92fc | 205 | ret = twl_i2c_write_u8(TWL4030_MODULE_USB, data, address); |
9ebd9616 DB |
206 | if (ret < 0) |
207 | dev_dbg(twl->dev, | |
208 | "TWL4030:USB:Write[0x%x] Error %d\n", address, ret); | |
209 | return ret; | |
210 | } | |
211 | ||
212 | static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address) | |
213 | { | |
214 | u8 data; | |
215 | int ret = 0; | |
216 | ||
fc7b92fc | 217 | ret = twl_i2c_read_u8(module, &data, address); |
9ebd9616 DB |
218 | if (ret >= 0) |
219 | ret = data; | |
220 | else | |
221 | dev_dbg(twl->dev, | |
222 | "TWL4030:readb[0x%x,0x%x] Error %d\n", | |
223 | module, address, ret); | |
224 | ||
225 | return ret; | |
226 | } | |
227 | ||
228 | static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address) | |
229 | { | |
230 | return twl4030_readb(twl, TWL4030_MODULE_USB, address); | |
231 | } | |
232 | ||
233 | /*-------------------------------------------------------------------------*/ | |
234 | ||
235 | static inline int | |
236 | twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits) | |
237 | { | |
92a6e6b3 | 238 | return twl4030_usb_write(twl, ULPI_SET(reg), bits); |
9ebd9616 DB |
239 | } |
240 | ||
241 | static inline int | |
242 | twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits) | |
243 | { | |
92a6e6b3 | 244 | return twl4030_usb_write(twl, ULPI_CLR(reg), bits); |
9ebd9616 DB |
245 | } |
246 | ||
247 | /*-------------------------------------------------------------------------*/ | |
248 | ||
de07e18c | 249 | static enum usb_phy_events twl4030_usb_linkstat(struct twl4030_usb *twl) |
9ebd9616 DB |
250 | { |
251 | int status; | |
d1b5b5c0 | 252 | int linkstat = USB_EVENT_NONE; |
9ebd9616 | 253 | |
a87103a6 MK |
254 | twl->vbus_supplied = false; |
255 | ||
def6f8b9 DB |
256 | /* |
257 | * For ID/VBUS sensing, see manual section 15.4.8 ... | |
258 | * except when using only battery backup power, two | |
259 | * comparators produce VBUS_PRES and ID_PRES signals, | |
260 | * which don't match docs elsewhere. But ... BIT(7) | |
261 | * and BIT(2) of STS_HW_CONDITIONS, respectively, do | |
262 | * seem to match up. If either is true the USB_PRES | |
263 | * signal is active, the OTG module is activated, and | |
264 | * its interrupt may be raised (may wake the system). | |
265 | */ | |
266 | status = twl4030_readb(twl, TWL4030_MODULE_PM_MASTER, | |
267 | STS_HW_CONDITIONS); | |
9ebd9616 DB |
268 | if (status < 0) |
269 | dev_err(twl->dev, "USB link status err %d\n", status); | |
def6f8b9 | 270 | else if (status & (BIT(7) | BIT(2))) { |
a87103a6 MK |
271 | if (status & (BIT(7))) |
272 | twl->vbus_supplied = true; | |
273 | ||
def6f8b9 | 274 | if (status & BIT(2)) |
d1b5b5c0 | 275 | linkstat = USB_EVENT_ID; |
def6f8b9 | 276 | else |
d1b5b5c0 | 277 | linkstat = USB_EVENT_VBUS; |
def6f8b9 | 278 | } else |
d1b5b5c0 | 279 | linkstat = USB_EVENT_NONE; |
9ebd9616 DB |
280 | |
281 | dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n", | |
282 | status, status, linkstat); | |
283 | ||
37db3af1 HH |
284 | twl->otg.last_event = linkstat; |
285 | ||
9ebd9616 DB |
286 | /* REVISIT this assumes host and peripheral controllers |
287 | * are registered, and that both are active... | |
288 | */ | |
289 | ||
290 | spin_lock_irq(&twl->lock); | |
291 | twl->linkstat = linkstat; | |
d1b5b5c0 | 292 | if (linkstat == USB_EVENT_ID) { |
9ebd9616 DB |
293 | twl->otg.default_a = true; |
294 | twl->otg.state = OTG_STATE_A_IDLE; | |
295 | } else { | |
296 | twl->otg.default_a = false; | |
297 | twl->otg.state = OTG_STATE_B_IDLE; | |
298 | } | |
299 | spin_unlock_irq(&twl->lock); | |
300 | ||
301 | return linkstat; | |
302 | } | |
303 | ||
304 | static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode) | |
305 | { | |
306 | twl->usb_mode = mode; | |
307 | ||
308 | switch (mode) { | |
309 | case T2_USB_MODE_ULPI: | |
92a6e6b3 HK |
310 | twl4030_usb_clear_bits(twl, ULPI_IFC_CTRL, |
311 | ULPI_IFC_CTRL_CARKITMODE); | |
9ebd9616 | 312 | twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); |
92a6e6b3 HK |
313 | twl4030_usb_clear_bits(twl, ULPI_FUNC_CTRL, |
314 | ULPI_FUNC_CTRL_XCVRSEL_MASK | | |
315 | ULPI_FUNC_CTRL_OPMODE_MASK); | |
9ebd9616 DB |
316 | break; |
317 | case -1: | |
318 | /* FIXME: power on defaults */ | |
319 | break; | |
320 | default: | |
321 | dev_err(twl->dev, "unsupported T2 transceiver mode %d\n", | |
322 | mode); | |
323 | break; | |
324 | }; | |
325 | } | |
326 | ||
327 | static void twl4030_i2c_access(struct twl4030_usb *twl, int on) | |
328 | { | |
329 | unsigned long timeout; | |
330 | int val = twl4030_usb_read(twl, PHY_CLK_CTRL); | |
331 | ||
332 | if (val >= 0) { | |
333 | if (on) { | |
334 | /* enable DPLL to access PHY registers over I2C */ | |
335 | val |= REQ_PHY_DPLL_CLK; | |
336 | WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, | |
337 | (u8)val) < 0); | |
338 | ||
339 | timeout = jiffies + HZ; | |
340 | while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & | |
341 | PHY_DPLL_CLK) | |
342 | && time_before(jiffies, timeout)) | |
343 | udelay(10); | |
344 | if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & | |
345 | PHY_DPLL_CLK)) | |
346 | dev_err(twl->dev, "Timeout setting T2 HSUSB " | |
347 | "PHY DPLL clock\n"); | |
348 | } else { | |
349 | /* let ULPI control the DPLL clock */ | |
350 | val &= ~REQ_PHY_DPLL_CLK; | |
351 | WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, | |
352 | (u8)val) < 0); | |
353 | } | |
354 | } | |
355 | } | |
356 | ||
fc8f2a76 | 357 | static void __twl4030_phy_power(struct twl4030_usb *twl, int on) |
9ebd9616 | 358 | { |
fc8f2a76 ML |
359 | u8 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL); |
360 | ||
361 | if (on) | |
362 | pwr &= ~PHY_PWR_PHYPWD; | |
363 | else | |
364 | pwr |= PHY_PWR_PHYPWD; | |
9ebd9616 | 365 | |
fc8f2a76 ML |
366 | WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0); |
367 | } | |
368 | ||
369 | static void twl4030_phy_power(struct twl4030_usb *twl, int on) | |
370 | { | |
9ebd9616 | 371 | if (on) { |
66760169 JH |
372 | regulator_enable(twl->usb3v1); |
373 | regulator_enable(twl->usb1v8); | |
374 | /* | |
375 | * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP | |
376 | * in twl4030) resets the VUSB_DEDICATED2 register. This reset | |
377 | * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to | |
378 | * SLEEP. We work around this by clearing the bit after usv3v1 | |
379 | * is re-activated. This ensures that VUSB3V1 is really active. | |
380 | */ | |
fc7b92fc | 381 | twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, |
66760169 JH |
382 | VUSB_DEDICATED2); |
383 | regulator_enable(twl->usb1v5); | |
fc8f2a76 | 384 | __twl4030_phy_power(twl, 1); |
9ebd9616 DB |
385 | twl4030_usb_write(twl, PHY_CLK_CTRL, |
386 | twl4030_usb_read(twl, PHY_CLK_CTRL) | | |
387 | (PHY_CLK_CTRL_CLOCKGATING_EN | | |
388 | PHY_CLK_CTRL_CLK32K_EN)); | |
fc8f2a76 ML |
389 | } else { |
390 | __twl4030_phy_power(twl, 0); | |
66760169 JH |
391 | regulator_disable(twl->usb1v5); |
392 | regulator_disable(twl->usb1v8); | |
393 | regulator_disable(twl->usb3v1); | |
9ebd9616 DB |
394 | } |
395 | } | |
396 | ||
397 | static void twl4030_phy_suspend(struct twl4030_usb *twl, int controller_off) | |
398 | { | |
399 | if (twl->asleep) | |
400 | return; | |
401 | ||
402 | twl4030_phy_power(twl, 0); | |
403 | twl->asleep = 1; | |
fc8f2a76 | 404 | dev_dbg(twl->dev, "%s\n", __func__); |
9ebd9616 DB |
405 | } |
406 | ||
fc8f2a76 | 407 | static void __twl4030_phy_resume(struct twl4030_usb *twl) |
9ebd9616 | 408 | { |
9ebd9616 DB |
409 | twl4030_phy_power(twl, 1); |
410 | twl4030_i2c_access(twl, 1); | |
411 | twl4030_usb_set_mode(twl, twl->usb_mode); | |
412 | if (twl->usb_mode == T2_USB_MODE_ULPI) | |
413 | twl4030_i2c_access(twl, 0); | |
fc8f2a76 ML |
414 | } |
415 | ||
416 | static void twl4030_phy_resume(struct twl4030_usb *twl) | |
417 | { | |
418 | if (!twl->asleep) | |
419 | return; | |
420 | __twl4030_phy_resume(twl); | |
9ebd9616 | 421 | twl->asleep = 0; |
fc8f2a76 | 422 | dev_dbg(twl->dev, "%s\n", __func__); |
9ebd9616 DB |
423 | } |
424 | ||
66760169 | 425 | static int twl4030_usb_ldo_init(struct twl4030_usb *twl) |
9ebd9616 DB |
426 | { |
427 | /* Enable writing to power configuration registers */ | |
e7944d82 FB |
428 | twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, |
429 | TWL4030_PM_MASTER_KEY_CFG1, | |
430 | TWL4030_PM_MASTER_PROTECT_KEY); | |
431 | ||
432 | twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, | |
433 | TWL4030_PM_MASTER_KEY_CFG2, | |
434 | TWL4030_PM_MASTER_PROTECT_KEY); | |
9ebd9616 | 435 | |
fc8f2a76 ML |
436 | /* Keep VUSB3V1 LDO in sleep state until VBUS/ID change detected*/ |
437 | /*twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);*/ | |
9ebd9616 DB |
438 | |
439 | /* input to VUSB3V1 LDO is from VBAT, not VBUS */ | |
fc7b92fc | 440 | twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1); |
9ebd9616 | 441 | |
66760169 | 442 | /* Initialize 3.1V regulator */ |
fc7b92fc | 443 | twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP); |
66760169 JH |
444 | |
445 | twl->usb3v1 = regulator_get(twl->dev, "usb3v1"); | |
446 | if (IS_ERR(twl->usb3v1)) | |
447 | return -ENODEV; | |
448 | ||
fc7b92fc | 449 | twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE); |
9ebd9616 | 450 | |
66760169 | 451 | /* Initialize 1.5V regulator */ |
fc7b92fc | 452 | twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP); |
66760169 JH |
453 | |
454 | twl->usb1v5 = regulator_get(twl->dev, "usb1v5"); | |
455 | if (IS_ERR(twl->usb1v5)) | |
456 | goto fail1; | |
457 | ||
fc7b92fc | 458 | twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE); |
9ebd9616 | 459 | |
66760169 | 460 | /* Initialize 1.8V regulator */ |
fc7b92fc | 461 | twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP); |
66760169 JH |
462 | |
463 | twl->usb1v8 = regulator_get(twl->dev, "usb1v8"); | |
464 | if (IS_ERR(twl->usb1v8)) | |
465 | goto fail2; | |
466 | ||
fc7b92fc | 467 | twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE); |
9ebd9616 DB |
468 | |
469 | /* disable access to power configuration registers */ | |
e7944d82 FB |
470 | twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, |
471 | TWL4030_PM_MASTER_PROTECT_KEY); | |
66760169 JH |
472 | |
473 | return 0; | |
474 | ||
475 | fail2: | |
476 | regulator_put(twl->usb1v5); | |
477 | twl->usb1v5 = NULL; | |
478 | fail1: | |
479 | regulator_put(twl->usb3v1); | |
480 | twl->usb3v1 = NULL; | |
481 | return -ENODEV; | |
9ebd9616 DB |
482 | } |
483 | ||
484 | static ssize_t twl4030_usb_vbus_show(struct device *dev, | |
485 | struct device_attribute *attr, char *buf) | |
486 | { | |
487 | struct twl4030_usb *twl = dev_get_drvdata(dev); | |
488 | unsigned long flags; | |
489 | int ret = -EINVAL; | |
490 | ||
491 | spin_lock_irqsave(&twl->lock, flags); | |
492 | ret = sprintf(buf, "%s\n", | |
a87103a6 | 493 | twl->vbus_supplied ? "on" : "off"); |
9ebd9616 DB |
494 | spin_unlock_irqrestore(&twl->lock, flags); |
495 | ||
496 | return ret; | |
497 | } | |
498 | static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL); | |
499 | ||
500 | static irqreturn_t twl4030_usb_irq(int irq, void *_twl) | |
501 | { | |
502 | struct twl4030_usb *twl = _twl; | |
503 | int status; | |
504 | ||
9ebd9616 | 505 | status = twl4030_usb_linkstat(twl); |
d1b5b5c0 | 506 | if (status >= 0) { |
9ebd9616 DB |
507 | /* FIXME add a set_power() method so that B-devices can |
508 | * configure the charger appropriately. It's not always | |
509 | * correct to consume VBUS power, and how much current to | |
510 | * consume is a function of the USB configuration chosen | |
511 | * by the host. | |
512 | * | |
513 | * REVISIT usb_gadget_vbus_connect(...) as needed, ditto | |
514 | * its disconnect() sibling, when changing to/from the | |
515 | * USB_LINK_VBUS state. musb_hdrc won't care until it | |
516 | * starts to handle softconnect right. | |
517 | */ | |
d1b5b5c0 | 518 | if (status == USB_EVENT_NONE) |
9ebd9616 DB |
519 | twl4030_phy_suspend(twl, 0); |
520 | else | |
521 | twl4030_phy_resume(twl); | |
be30fc4b | 522 | |
cccad6d4 | 523 | atomic_notifier_call_chain(&twl->otg.notifier, status, |
d1b5b5c0 | 524 | twl->otg.gadget); |
9ebd9616 DB |
525 | } |
526 | sysfs_notify(&twl->dev->kobj, NULL, "vbus"); | |
527 | ||
528 | return IRQ_HANDLED; | |
529 | } | |
530 | ||
fc8f2a76 ML |
531 | static void twl4030_usb_phy_init(struct twl4030_usb *twl) |
532 | { | |
533 | int status; | |
534 | ||
535 | status = twl4030_usb_linkstat(twl); | |
536 | if (status >= 0) { | |
537 | if (status == USB_EVENT_NONE) { | |
538 | __twl4030_phy_power(twl, 0); | |
539 | twl->asleep = 1; | |
540 | } else { | |
541 | __twl4030_phy_resume(twl); | |
542 | twl->asleep = 0; | |
543 | } | |
544 | ||
cccad6d4 | 545 | atomic_notifier_call_chain(&twl->otg.notifier, status, |
fc8f2a76 ML |
546 | twl->otg.gadget); |
547 | } | |
548 | sysfs_notify(&twl->dev->kobj, NULL, "vbus"); | |
549 | } | |
550 | ||
86753811 | 551 | static int twl4030_set_suspend(struct usb_phy *x, int suspend) |
9ebd9616 DB |
552 | { |
553 | struct twl4030_usb *twl = xceiv_to_twl(x); | |
554 | ||
555 | if (suspend) | |
556 | twl4030_phy_suspend(twl, 1); | |
557 | else | |
558 | twl4030_phy_resume(twl); | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
86753811 | 563 | static int twl4030_set_peripheral(struct usb_phy *x, |
9ebd9616 DB |
564 | struct usb_gadget *gadget) |
565 | { | |
566 | struct twl4030_usb *twl; | |
567 | ||
568 | if (!x) | |
569 | return -ENODEV; | |
570 | ||
571 | twl = xceiv_to_twl(x); | |
572 | twl->otg.gadget = gadget; | |
573 | if (!gadget) | |
574 | twl->otg.state = OTG_STATE_UNDEFINED; | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
86753811 | 579 | static int twl4030_set_host(struct usb_phy *x, struct usb_bus *host) |
9ebd9616 DB |
580 | { |
581 | struct twl4030_usb *twl; | |
582 | ||
583 | if (!x) | |
584 | return -ENODEV; | |
585 | ||
586 | twl = xceiv_to_twl(x); | |
587 | twl->otg.host = host; | |
588 | if (!host) | |
589 | twl->otg.state = OTG_STATE_UNDEFINED; | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
d8b175e7 | 594 | static int __devinit twl4030_usb_probe(struct platform_device *pdev) |
9ebd9616 DB |
595 | { |
596 | struct twl4030_usb_data *pdata = pdev->dev.platform_data; | |
597 | struct twl4030_usb *twl; | |
66760169 | 598 | int status, err; |
9ebd9616 DB |
599 | |
600 | if (!pdata) { | |
601 | dev_dbg(&pdev->dev, "platform_data not available\n"); | |
602 | return -EINVAL; | |
603 | } | |
604 | ||
605 | twl = kzalloc(sizeof *twl, GFP_KERNEL); | |
606 | if (!twl) | |
607 | return -ENOMEM; | |
608 | ||
609 | twl->dev = &pdev->dev; | |
610 | twl->irq = platform_get_irq(pdev, 0); | |
611 | twl->otg.dev = twl->dev; | |
612 | twl->otg.label = "twl4030"; | |
613 | twl->otg.set_host = twl4030_set_host; | |
614 | twl->otg.set_peripheral = twl4030_set_peripheral; | |
615 | twl->otg.set_suspend = twl4030_set_suspend; | |
616 | twl->usb_mode = pdata->usb_mode; | |
a87103a6 | 617 | twl->vbus_supplied = false; |
fc8f2a76 | 618 | twl->asleep = 1; |
9ebd9616 DB |
619 | |
620 | /* init spinlock for workqueue */ | |
621 | spin_lock_init(&twl->lock); | |
622 | ||
66760169 JH |
623 | err = twl4030_usb_ldo_init(twl); |
624 | if (err) { | |
625 | dev_err(&pdev->dev, "ldo init failed\n"); | |
626 | kfree(twl); | |
627 | return err; | |
628 | } | |
9ebd9616 DB |
629 | otg_set_transceiver(&twl->otg); |
630 | ||
631 | platform_set_drvdata(pdev, twl); | |
632 | if (device_create_file(&pdev->dev, &dev_attr_vbus)) | |
633 | dev_warn(&pdev->dev, "could not create sysfs file\n"); | |
634 | ||
cccad6d4 | 635 | ATOMIC_INIT_NOTIFIER_HEAD(&twl->otg.notifier); |
d1b5b5c0 | 636 | |
9ebd9616 DB |
637 | /* Our job is to use irqs and status from the power module |
638 | * to keep the transceiver disabled when nothing's connected. | |
639 | * | |
640 | * FIXME we actually shouldn't start enabling it until the | |
641 | * USB controller drivers have said they're ready, by calling | |
642 | * set_host() and/or set_peripheral() ... OTG_capable boards | |
643 | * need both handles, otherwise just one suffices. | |
644 | */ | |
645 | twl->irq_enabled = true; | |
8f20960c | 646 | status = request_threaded_irq(twl->irq, NULL, twl4030_usb_irq, |
9ebd9616 DB |
647 | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, |
648 | "twl4030_usb", twl); | |
649 | if (status < 0) { | |
650 | dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n", | |
651 | twl->irq, status); | |
652 | kfree(twl); | |
653 | return status; | |
654 | } | |
655 | ||
fc8f2a76 ML |
656 | /* Power down phy or make it work according to |
657 | * current link state. | |
9ebd9616 | 658 | */ |
fc8f2a76 | 659 | twl4030_usb_phy_init(twl); |
9ebd9616 DB |
660 | |
661 | dev_info(&pdev->dev, "Initialized TWL4030 USB module\n"); | |
662 | return 0; | |
663 | } | |
664 | ||
665 | static int __exit twl4030_usb_remove(struct platform_device *pdev) | |
666 | { | |
667 | struct twl4030_usb *twl = platform_get_drvdata(pdev); | |
668 | int val; | |
669 | ||
670 | free_irq(twl->irq, twl); | |
671 | device_remove_file(twl->dev, &dev_attr_vbus); | |
672 | ||
673 | /* set transceiver mode to power on defaults */ | |
674 | twl4030_usb_set_mode(twl, -1); | |
675 | ||
676 | /* autogate 60MHz ULPI clock, | |
677 | * clear dpll clock request for i2c access, | |
678 | * disable 32KHz | |
679 | */ | |
680 | val = twl4030_usb_read(twl, PHY_CLK_CTRL); | |
681 | if (val >= 0) { | |
682 | val |= PHY_CLK_CTRL_CLOCKGATING_EN; | |
683 | val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK); | |
684 | twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val); | |
685 | } | |
686 | ||
687 | /* disable complete OTG block */ | |
688 | twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); | |
689 | ||
c3d6450e JN |
690 | if (!twl->asleep) |
691 | twl4030_phy_power(twl, 0); | |
66760169 JH |
692 | regulator_put(twl->usb1v5); |
693 | regulator_put(twl->usb1v8); | |
694 | regulator_put(twl->usb3v1); | |
9ebd9616 DB |
695 | |
696 | kfree(twl); | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static struct platform_driver twl4030_usb_driver = { | |
702 | .probe = twl4030_usb_probe, | |
703 | .remove = __exit_p(twl4030_usb_remove), | |
704 | .driver = { | |
705 | .name = "twl4030_usb", | |
706 | .owner = THIS_MODULE, | |
707 | }, | |
708 | }; | |
709 | ||
710 | static int __init twl4030_usb_init(void) | |
711 | { | |
712 | return platform_driver_register(&twl4030_usb_driver); | |
713 | } | |
714 | subsys_initcall(twl4030_usb_init); | |
715 | ||
716 | static void __exit twl4030_usb_exit(void) | |
717 | { | |
718 | platform_driver_unregister(&twl4030_usb_driver); | |
719 | } | |
720 | module_exit(twl4030_usb_exit); | |
721 | ||
722 | MODULE_ALIAS("platform:twl4030_usb"); | |
723 | MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation"); | |
724 | MODULE_DESCRIPTION("TWL4030 USB transceiver driver"); | |
725 | MODULE_LICENSE("GPL"); |