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ba4bdc9e HG |
1 | /* |
2 | * Allwinner sun4i USB phy driver | |
3 | * | |
d2332303 | 4 | * Copyright (C) 2014-2015 Hans de Goede <hdegoede@redhat.com> |
ba4bdc9e HG |
5 | * |
6 | * Based on code from | |
7 | * Allwinner Technology Co., Ltd. <www.allwinnertech.com> | |
8 | * | |
9 | * Modelled after: Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY driver | |
10 | * Copyright (C) 2013 Samsung Electronics Co., Ltd. | |
11 | * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | */ | |
23 | ||
24 | #include <linux/clk.h> | |
1aedf3a7 | 25 | #include <linux/delay.h> |
2d84aff9 | 26 | #include <linux/err.h> |
1a52abe6 | 27 | #include <linux/extcon.h> |
ba4bdc9e | 28 | #include <linux/io.h> |
d2332303 | 29 | #include <linux/interrupt.h> |
ba4bdc9e HG |
30 | #include <linux/kernel.h> |
31 | #include <linux/module.h> | |
32 | #include <linux/mutex.h> | |
33 | #include <linux/of.h> | |
34 | #include <linux/of_address.h> | |
d2332303 | 35 | #include <linux/of_gpio.h> |
ba4bdc9e | 36 | #include <linux/phy/phy.h> |
24fe86a6 | 37 | #include <linux/phy/phy-sun4i-usb.h> |
ba4bdc9e | 38 | #include <linux/platform_device.h> |
8665c18b | 39 | #include <linux/power_supply.h> |
ba4bdc9e HG |
40 | #include <linux/regulator/consumer.h> |
41 | #include <linux/reset.h> | |
d2332303 | 42 | #include <linux/workqueue.h> |
ba4bdc9e HG |
43 | |
44 | #define REG_ISCR 0x00 | |
fc1f45ed | 45 | #define REG_PHYCTL_A10 0x04 |
ba4bdc9e HG |
46 | #define REG_PHYBIST 0x08 |
47 | #define REG_PHYTUNE 0x0c | |
fc1f45ed | 48 | #define REG_PHYCTL_A33 0x10 |
ba4bdc9e HG |
49 | |
50 | #define PHYCTL_DATA BIT(7) | |
51 | ||
52 | #define SUNXI_AHB_ICHR8_EN BIT(10) | |
53 | #define SUNXI_AHB_INCR4_BURST_EN BIT(9) | |
54 | #define SUNXI_AHB_INCRX_ALIGN_EN BIT(8) | |
55 | #define SUNXI_ULPI_BYPASS_EN BIT(0) | |
56 | ||
d2332303 HG |
57 | /* ISCR, Interface Status and Control bits */ |
58 | #define ISCR_ID_PULLUP_EN (1 << 17) | |
59 | #define ISCR_DPDM_PULLUP_EN (1 << 16) | |
60 | /* sunxi has the phy id/vbus pins not connected, so we use the force bits */ | |
61 | #define ISCR_FORCE_ID_MASK (3 << 14) | |
62 | #define ISCR_FORCE_ID_LOW (2 << 14) | |
63 | #define ISCR_FORCE_ID_HIGH (3 << 14) | |
64 | #define ISCR_FORCE_VBUS_MASK (3 << 12) | |
65 | #define ISCR_FORCE_VBUS_LOW (2 << 12) | |
66 | #define ISCR_FORCE_VBUS_HIGH (3 << 12) | |
67 | ||
ba4bdc9e HG |
68 | /* Common Control Bits for Both PHYs */ |
69 | #define PHY_PLL_BW 0x03 | |
70 | #define PHY_RES45_CAL_EN 0x0c | |
71 | ||
72 | /* Private Control Bits for Each PHY */ | |
73 | #define PHY_TX_AMPLITUDE_TUNE 0x20 | |
74 | #define PHY_TX_SLEWRATE_TUNE 0x22 | |
75 | #define PHY_VBUSVALID_TH_SEL 0x25 | |
76 | #define PHY_PULLUP_RES_SEL 0x27 | |
77 | #define PHY_OTG_FUNC_EN 0x28 | |
78 | #define PHY_VBUS_DET_EN 0x29 | |
79 | #define PHY_DISCON_TH_SEL 0x2a | |
24fe86a6 | 80 | #define PHY_SQUELCH_DETECT 0x3c |
ba4bdc9e HG |
81 | |
82 | #define MAX_PHYS 3 | |
83 | ||
d2332303 HG |
84 | /* |
85 | * Note do not raise the debounce time, we must report Vusb high within 100ms | |
86 | * otherwise we get Vbus errors | |
87 | */ | |
88 | #define DEBOUNCE_TIME msecs_to_jiffies(50) | |
89 | #define POLL_TIME msecs_to_jiffies(250) | |
90 | ||
ba4bdc9e | 91 | struct sun4i_usb_phy_data { |
ba4bdc9e HG |
92 | void __iomem *base; |
93 | struct mutex mutex; | |
94 | int num_phys; | |
95 | u32 disc_thresh; | |
fc1f45ed | 96 | bool has_a33_phyctl; |
ba4bdc9e HG |
97 | struct sun4i_usb_phy { |
98 | struct phy *phy; | |
99 | void __iomem *pmu; | |
100 | struct regulator *vbus; | |
101 | struct reset_control *reset; | |
eadd4312 | 102 | struct clk *clk; |
d2332303 | 103 | bool regulator_on; |
ba4bdc9e HG |
104 | int index; |
105 | } phys[MAX_PHYS]; | |
d2332303 | 106 | /* phy0 / otg related variables */ |
1a52abe6 | 107 | struct extcon_dev *extcon; |
d2332303 HG |
108 | bool phy0_init; |
109 | bool phy0_poll; | |
110 | struct gpio_desc *id_det_gpio; | |
111 | struct gpio_desc *vbus_det_gpio; | |
8665c18b HG |
112 | struct power_supply *vbus_power_supply; |
113 | struct notifier_block vbus_power_nb; | |
114 | bool vbus_power_nb_registered; | |
d2332303 HG |
115 | int id_det_irq; |
116 | int vbus_det_irq; | |
117 | int id_det; | |
118 | int vbus_det; | |
119 | struct delayed_work detect; | |
ba4bdc9e HG |
120 | }; |
121 | ||
122 | #define to_sun4i_usb_phy_data(phy) \ | |
123 | container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index]) | |
124 | ||
d2332303 HG |
125 | static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set) |
126 | { | |
127 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
128 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
129 | u32 iscr; | |
130 | ||
131 | iscr = readl(data->base + REG_ISCR); | |
132 | iscr &= ~clr; | |
133 | iscr |= set; | |
134 | writel(iscr, data->base + REG_ISCR); | |
135 | } | |
136 | ||
137 | static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val) | |
138 | { | |
139 | if (val) | |
140 | val = ISCR_FORCE_ID_HIGH; | |
141 | else | |
142 | val = ISCR_FORCE_ID_LOW; | |
143 | ||
144 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val); | |
145 | } | |
146 | ||
147 | static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val) | |
148 | { | |
149 | if (val) | |
150 | val = ISCR_FORCE_VBUS_HIGH; | |
151 | else | |
152 | val = ISCR_FORCE_VBUS_LOW; | |
153 | ||
154 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val); | |
155 | } | |
156 | ||
ba4bdc9e HG |
157 | static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data, |
158 | int len) | |
159 | { | |
160 | struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy); | |
161 | u32 temp, usbc_bit = BIT(phy->index * 2); | |
fc1f45ed | 162 | void *phyctl; |
ba4bdc9e HG |
163 | int i; |
164 | ||
165 | mutex_lock(&phy_data->mutex); | |
166 | ||
fc1f45ed HG |
167 | if (phy_data->has_a33_phyctl) { |
168 | phyctl = phy_data->base + REG_PHYCTL_A33; | |
169 | /* A33 needs us to set phyctl to 0 explicitly */ | |
170 | writel(0, phyctl); | |
171 | } else { | |
172 | phyctl = phy_data->base + REG_PHYCTL_A10; | |
173 | } | |
174 | ||
ba4bdc9e | 175 | for (i = 0; i < len; i++) { |
fc1f45ed | 176 | temp = readl(phyctl); |
ba4bdc9e HG |
177 | |
178 | /* clear the address portion */ | |
179 | temp &= ~(0xff << 8); | |
180 | ||
181 | /* set the address */ | |
182 | temp |= ((addr + i) << 8); | |
fc1f45ed | 183 | writel(temp, phyctl); |
ba4bdc9e HG |
184 | |
185 | /* set the data bit and clear usbc bit*/ | |
fc1f45ed | 186 | temp = readb(phyctl); |
ba4bdc9e HG |
187 | if (data & 0x1) |
188 | temp |= PHYCTL_DATA; | |
189 | else | |
190 | temp &= ~PHYCTL_DATA; | |
191 | temp &= ~usbc_bit; | |
fc1f45ed | 192 | writeb(temp, phyctl); |
ba4bdc9e HG |
193 | |
194 | /* pulse usbc_bit */ | |
fc1f45ed | 195 | temp = readb(phyctl); |
ba4bdc9e | 196 | temp |= usbc_bit; |
fc1f45ed | 197 | writeb(temp, phyctl); |
ba4bdc9e | 198 | |
fc1f45ed | 199 | temp = readb(phyctl); |
ba4bdc9e | 200 | temp &= ~usbc_bit; |
fc1f45ed | 201 | writeb(temp, phyctl); |
ba4bdc9e HG |
202 | |
203 | data >>= 1; | |
204 | } | |
205 | mutex_unlock(&phy_data->mutex); | |
206 | } | |
207 | ||
208 | static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable) | |
209 | { | |
210 | u32 bits, reg_value; | |
211 | ||
212 | if (!phy->pmu) | |
213 | return; | |
214 | ||
215 | bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN | | |
216 | SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN; | |
217 | ||
218 | reg_value = readl(phy->pmu); | |
219 | ||
220 | if (enable) | |
221 | reg_value |= bits; | |
222 | else | |
223 | reg_value &= ~bits; | |
224 | ||
225 | writel(reg_value, phy->pmu); | |
226 | } | |
227 | ||
228 | static int sun4i_usb_phy_init(struct phy *_phy) | |
229 | { | |
230 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
231 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
232 | int ret; | |
233 | ||
eadd4312 | 234 | ret = clk_prepare_enable(phy->clk); |
ba4bdc9e HG |
235 | if (ret) |
236 | return ret; | |
237 | ||
238 | ret = reset_control_deassert(phy->reset); | |
239 | if (ret) { | |
eadd4312 | 240 | clk_disable_unprepare(phy->clk); |
ba4bdc9e HG |
241 | return ret; |
242 | } | |
243 | ||
6827a46f RB |
244 | /* Enable USB 45 Ohm resistor calibration */ |
245 | if (phy->index == 0) | |
246 | sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1); | |
247 | ||
ba4bdc9e HG |
248 | /* Adjust PHY's magnitude and rate */ |
249 | sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5); | |
250 | ||
251 | /* Disconnect threshold adjustment */ | |
252 | sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, data->disc_thresh, 2); | |
253 | ||
254 | sun4i_usb_phy_passby(phy, 1); | |
255 | ||
d2332303 HG |
256 | if (phy->index == 0) { |
257 | data->phy0_init = true; | |
258 | ||
259 | /* Enable pull-ups */ | |
260 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN); | |
261 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN); | |
262 | ||
263 | if (data->id_det_gpio) { | |
264 | /* OTG mode, force ISCR and cable state updates */ | |
265 | data->id_det = -1; | |
266 | data->vbus_det = -1; | |
267 | queue_delayed_work(system_wq, &data->detect, 0); | |
268 | } else { | |
269 | /* Host only mode */ | |
270 | sun4i_usb_phy0_set_id_detect(_phy, 0); | |
271 | sun4i_usb_phy0_set_vbus_detect(_phy, 1); | |
272 | } | |
273 | } | |
274 | ||
ba4bdc9e HG |
275 | return 0; |
276 | } | |
277 | ||
278 | static int sun4i_usb_phy_exit(struct phy *_phy) | |
279 | { | |
280 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
281 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
282 | ||
283 | if (phy->index == 0) { | |
284 | /* Disable pull-ups */ | |
285 | sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0); | |
286 | sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0); | |
287 | data->phy0_init = false; | |
288 | } | |
ba4bdc9e HG |
289 | |
290 | sun4i_usb_phy_passby(phy, 0); | |
291 | reset_control_assert(phy->reset); | |
eadd4312 | 292 | clk_disable_unprepare(phy->clk); |
ba4bdc9e HG |
293 | |
294 | return 0; | |
295 | } | |
296 | ||
3d772c4a HG |
297 | static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data) |
298 | { | |
299 | if (data->vbus_det_gpio) | |
300 | return gpiod_get_value_cansleep(data->vbus_det_gpio); | |
301 | ||
302 | if (data->vbus_power_supply) { | |
303 | union power_supply_propval val; | |
304 | int r; | |
305 | ||
306 | r = power_supply_get_property(data->vbus_power_supply, | |
307 | POWER_SUPPLY_PROP_PRESENT, &val); | |
308 | if (r == 0) | |
309 | return val.intval; | |
310 | } | |
311 | ||
312 | /* Fallback: report vbus as high */ | |
313 | return 1; | |
314 | } | |
315 | ||
316 | static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data) | |
317 | { | |
318 | return data->vbus_det_gpio || data->vbus_power_supply; | |
319 | } | |
320 | ||
ba4bdc9e HG |
321 | static int sun4i_usb_phy_power_on(struct phy *_phy) |
322 | { | |
323 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
324 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
325 | int ret; | |
326 | ||
327 | if (!phy->vbus || phy->regulator_on) | |
328 | return 0; | |
329 | ||
330 | /* For phy0 only turn on Vbus if we don't have an ext. Vbus */ | |
8083526e HG |
331 | if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) && |
332 | data->vbus_det) | |
d2332303 | 333 | return 0; |
ba4bdc9e | 334 | |
d2332303 HG |
335 | ret = regulator_enable(phy->vbus); |
336 | if (ret) | |
337 | return ret; | |
ba4bdc9e | 338 | |
d2332303 | 339 | phy->regulator_on = true; |
ba4bdc9e | 340 | |
d2332303 | 341 | /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */ |
1aedf3a7 | 342 | if (phy->index == 0 && data->vbus_det_gpio && data->phy0_poll) |
d2332303 | 343 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); |
ba4bdc9e | 344 | |
d2332303 | 345 | return 0; |
ba4bdc9e HG |
346 | } |
347 | ||
348 | static int sun4i_usb_phy_power_off(struct phy *_phy) | |
349 | { | |
350 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
351 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
352 | ||
353 | if (!phy->vbus || !phy->regulator_on) | |
354 | return 0; | |
ba4bdc9e | 355 | |
d2332303 HG |
356 | regulator_disable(phy->vbus); |
357 | phy->regulator_on = false; | |
ba4bdc9e | 358 | |
d2332303 HG |
359 | /* |
360 | * phy0 vbus typically slowly discharges, sometimes this causes the | |
361 | * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan. | |
362 | */ | |
1aedf3a7 | 363 | if (phy->index == 0 && data->vbus_det_gpio && !data->phy0_poll) |
d2332303 | 364 | mod_delayed_work(system_wq, &data->detect, POLL_TIME); |
ba4bdc9e HG |
365 | |
366 | return 0; | |
367 | } | |
368 | ||
24fe86a6 HG |
369 | void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled) |
370 | { | |
371 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
372 | ||
373 | sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2); | |
374 | } | |
7167bf8b | 375 | EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect); |
24fe86a6 | 376 | |
4a9e5ca1 | 377 | static const struct phy_ops sun4i_usb_phy_ops = { |
ba4bdc9e HG |
378 | .init = sun4i_usb_phy_init, |
379 | .exit = sun4i_usb_phy_exit, | |
380 | .power_on = sun4i_usb_phy_power_on, | |
381 | .power_off = sun4i_usb_phy_power_off, | |
382 | .owner = THIS_MODULE, | |
383 | }; | |
384 | ||
d2332303 HG |
385 | static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) |
386 | { | |
387 | struct sun4i_usb_phy_data *data = | |
388 | container_of(work, struct sun4i_usb_phy_data, detect.work); | |
389 | struct phy *phy0 = data->phys[0].phy; | |
1a52abe6 | 390 | int id_det, vbus_det, id_notify = 0, vbus_notify = 0; |
d2332303 HG |
391 | |
392 | id_det = gpiod_get_value_cansleep(data->id_det_gpio); | |
8665c18b | 393 | vbus_det = sun4i_usb_phy0_get_vbus_det(data); |
d2332303 HG |
394 | |
395 | mutex_lock(&phy0->mutex); | |
396 | ||
397 | if (!data->phy0_init) { | |
398 | mutex_unlock(&phy0->mutex); | |
399 | return; | |
400 | } | |
401 | ||
402 | if (id_det != data->id_det) { | |
1aedf3a7 HG |
403 | /* |
404 | * When a host cable (id == 0) gets plugged in on systems | |
405 | * without vbus detection report vbus low for long enough for | |
406 | * the musb-ip to end the current device session. | |
407 | */ | |
8665c18b | 408 | if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) { |
1aedf3a7 HG |
409 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); |
410 | msleep(200); | |
411 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
412 | } | |
d2332303 HG |
413 | sun4i_usb_phy0_set_id_detect(phy0, id_det); |
414 | data->id_det = id_det; | |
1a52abe6 | 415 | id_notify = 1; |
d2332303 HG |
416 | } |
417 | ||
418 | if (vbus_det != data->vbus_det) { | |
419 | sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det); | |
420 | data->vbus_det = vbus_det; | |
1a52abe6 | 421 | vbus_notify = 1; |
d2332303 HG |
422 | } |
423 | ||
424 | mutex_unlock(&phy0->mutex); | |
425 | ||
1aedf3a7 | 426 | if (id_notify) { |
1a52abe6 HG |
427 | extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST, |
428 | !id_det); | |
1aedf3a7 HG |
429 | /* |
430 | * When a host cable gets unplugged (id == 1) on systems | |
431 | * without vbus detection report vbus low for long enough to | |
432 | * the musb-ip to end the current host session. | |
433 | */ | |
8665c18b | 434 | if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) { |
1aedf3a7 HG |
435 | mutex_lock(&phy0->mutex); |
436 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); | |
437 | msleep(1000); | |
438 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
439 | mutex_unlock(&phy0->mutex); | |
440 | } | |
441 | } | |
1a52abe6 HG |
442 | |
443 | if (vbus_notify) | |
444 | extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det); | |
445 | ||
d2332303 HG |
446 | if (data->phy0_poll) |
447 | queue_delayed_work(system_wq, &data->detect, POLL_TIME); | |
448 | } | |
449 | ||
450 | static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id) | |
451 | { | |
452 | struct sun4i_usb_phy_data *data = dev_id; | |
453 | ||
454 | /* vbus or id changed, let the pins settle and then scan them */ | |
455 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
456 | ||
457 | return IRQ_HANDLED; | |
458 | } | |
459 | ||
8665c18b HG |
460 | static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb, |
461 | unsigned long val, void *v) | |
462 | { | |
463 | struct sun4i_usb_phy_data *data = | |
464 | container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb); | |
465 | struct power_supply *psy = v; | |
466 | ||
467 | /* Properties on the vbus_power_supply changed, scan vbus_det */ | |
468 | if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply) | |
469 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
470 | ||
471 | return NOTIFY_OK; | |
472 | } | |
473 | ||
ba4bdc9e HG |
474 | static struct phy *sun4i_usb_phy_xlate(struct device *dev, |
475 | struct of_phandle_args *args) | |
476 | { | |
477 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
478 | ||
6827a46f | 479 | if (args->args[0] >= data->num_phys) |
ba4bdc9e HG |
480 | return ERR_PTR(-ENODEV); |
481 | ||
482 | return data->phys[args->args[0]].phy; | |
483 | } | |
484 | ||
d2332303 HG |
485 | static int sun4i_usb_phy_remove(struct platform_device *pdev) |
486 | { | |
487 | struct device *dev = &pdev->dev; | |
488 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
489 | ||
8665c18b HG |
490 | if (data->vbus_power_nb_registered) |
491 | power_supply_unreg_notifier(&data->vbus_power_nb); | |
d2332303 HG |
492 | if (data->id_det_irq >= 0) |
493 | devm_free_irq(dev, data->id_det_irq, data); | |
494 | if (data->vbus_det_irq >= 0) | |
495 | devm_free_irq(dev, data->vbus_det_irq, data); | |
496 | ||
497 | cancel_delayed_work_sync(&data->detect); | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
1a52abe6 HG |
502 | static const unsigned int sun4i_usb_phy0_cable[] = { |
503 | EXTCON_USB, | |
504 | EXTCON_USB_HOST, | |
505 | EXTCON_NONE, | |
506 | }; | |
507 | ||
ba4bdc9e HG |
508 | static int sun4i_usb_phy_probe(struct platform_device *pdev) |
509 | { | |
510 | struct sun4i_usb_phy_data *data; | |
511 | struct device *dev = &pdev->dev; | |
512 | struct device_node *np = dev->of_node; | |
ba4bdc9e | 513 | struct phy_provider *phy_provider; |
eadd4312 | 514 | bool dedicated_clocks; |
ba4bdc9e | 515 | struct resource *res; |
d2332303 | 516 | int i, ret; |
ba4bdc9e HG |
517 | |
518 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
519 | if (!data) | |
520 | return -ENOMEM; | |
521 | ||
522 | mutex_init(&data->mutex); | |
d2332303 HG |
523 | INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan); |
524 | dev_set_drvdata(dev, data); | |
ba4bdc9e | 525 | |
123dfdbc | 526 | if (of_device_is_compatible(np, "allwinner,sun5i-a13-usb-phy") || |
fc1f45ed HG |
527 | of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") || |
528 | of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy")) | |
ba4bdc9e HG |
529 | data->num_phys = 2; |
530 | else | |
531 | data->num_phys = 3; | |
532 | ||
28464696 HG |
533 | if (of_device_is_compatible(np, "allwinner,sun5i-a13-usb-phy") || |
534 | of_device_is_compatible(np, "allwinner,sun7i-a20-usb-phy")) | |
ba4bdc9e | 535 | data->disc_thresh = 2; |
28464696 HG |
536 | else |
537 | data->disc_thresh = 3; | |
ba4bdc9e | 538 | |
123dfdbc | 539 | if (of_device_is_compatible(np, "allwinner,sun6i-a31-usb-phy") || |
fc1f45ed HG |
540 | of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") || |
541 | of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy")) | |
eadd4312 MR |
542 | dedicated_clocks = true; |
543 | else | |
544 | dedicated_clocks = false; | |
545 | ||
fc1f45ed HG |
546 | if (of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy")) |
547 | data->has_a33_phyctl = true; | |
548 | ||
ba4bdc9e HG |
549 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl"); |
550 | data->base = devm_ioremap_resource(dev, res); | |
551 | if (IS_ERR(data->base)) | |
552 | return PTR_ERR(data->base); | |
553 | ||
b2dfc34c AL |
554 | data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det", |
555 | GPIOD_IN); | |
556 | if (IS_ERR(data->id_det_gpio)) | |
557 | return PTR_ERR(data->id_det_gpio); | |
558 | ||
559 | data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det", | |
560 | GPIOD_IN); | |
561 | if (IS_ERR(data->vbus_det_gpio)) | |
562 | return PTR_ERR(data->vbus_det_gpio); | |
d2332303 | 563 | |
8665c18b HG |
564 | if (of_find_property(np, "usb0_vbus_power-supply", NULL)) { |
565 | data->vbus_power_supply = devm_power_supply_get_by_phandle(dev, | |
566 | "usb0_vbus_power-supply"); | |
567 | if (IS_ERR(data->vbus_power_supply)) | |
568 | return PTR_ERR(data->vbus_power_supply); | |
569 | ||
570 | if (!data->vbus_power_supply) | |
571 | return -EPROBE_DEFER; | |
572 | } | |
573 | ||
1aedf3a7 | 574 | /* vbus_det without id_det makes no sense, and is not supported */ |
8665c18b | 575 | if (sun4i_usb_phy0_have_vbus_det(data) && !data->id_det_gpio) { |
1aedf3a7 | 576 | dev_err(dev, "usb0_id_det missing or invalid\n"); |
d2332303 HG |
577 | return -ENODEV; |
578 | } | |
579 | ||
1a52abe6 HG |
580 | if (data->id_det_gpio) { |
581 | data->extcon = devm_extcon_dev_allocate(dev, | |
582 | sun4i_usb_phy0_cable); | |
583 | if (IS_ERR(data->extcon)) | |
584 | return PTR_ERR(data->extcon); | |
585 | ||
586 | ret = devm_extcon_dev_register(dev, data->extcon); | |
587 | if (ret) { | |
588 | dev_err(dev, "failed to register extcon: %d\n", ret); | |
589 | return ret; | |
590 | } | |
591 | } | |
592 | ||
6827a46f | 593 | for (i = 0; i < data->num_phys; i++) { |
2a7f9982 MR |
594 | struct sun4i_usb_phy *phy = data->phys + i; |
595 | char name[16]; | |
596 | ||
ba4bdc9e | 597 | snprintf(name, sizeof(name), "usb%d_vbus", i); |
2a7f9982 MR |
598 | phy->vbus = devm_regulator_get_optional(dev, name); |
599 | if (IS_ERR(phy->vbus)) { | |
600 | if (PTR_ERR(phy->vbus) == -EPROBE_DEFER) | |
ba4bdc9e | 601 | return -EPROBE_DEFER; |
2a7f9982 | 602 | phy->vbus = NULL; |
ba4bdc9e HG |
603 | } |
604 | ||
eadd4312 MR |
605 | if (dedicated_clocks) |
606 | snprintf(name, sizeof(name), "usb%d_phy", i); | |
607 | else | |
608 | strlcpy(name, "usb_phy", sizeof(name)); | |
609 | ||
610 | phy->clk = devm_clk_get(dev, name); | |
611 | if (IS_ERR(phy->clk)) { | |
612 | dev_err(dev, "failed to get clock %s\n", name); | |
613 | return PTR_ERR(phy->clk); | |
614 | } | |
615 | ||
ba4bdc9e | 616 | snprintf(name, sizeof(name), "usb%d_reset", i); |
2a7f9982 MR |
617 | phy->reset = devm_reset_control_get(dev, name); |
618 | if (IS_ERR(phy->reset)) { | |
ba4bdc9e | 619 | dev_err(dev, "failed to get reset %s\n", name); |
2a7f9982 | 620 | return PTR_ERR(phy->reset); |
ba4bdc9e HG |
621 | } |
622 | ||
623 | if (i) { /* No pmu for usbc0 */ | |
624 | snprintf(name, sizeof(name), "pmu%d", i); | |
625 | res = platform_get_resource_byname(pdev, | |
626 | IORESOURCE_MEM, name); | |
2a7f9982 MR |
627 | phy->pmu = devm_ioremap_resource(dev, res); |
628 | if (IS_ERR(phy->pmu)) | |
629 | return PTR_ERR(phy->pmu); | |
ba4bdc9e HG |
630 | } |
631 | ||
dbc98635 | 632 | phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops); |
2a7f9982 | 633 | if (IS_ERR(phy->phy)) { |
ba4bdc9e | 634 | dev_err(dev, "failed to create PHY %d\n", i); |
2a7f9982 | 635 | return PTR_ERR(phy->phy); |
ba4bdc9e HG |
636 | } |
637 | ||
2a7f9982 MR |
638 | phy->index = i; |
639 | phy_set_drvdata(phy->phy, &data->phys[i]); | |
ba4bdc9e HG |
640 | } |
641 | ||
d2332303 HG |
642 | data->id_det_irq = gpiod_to_irq(data->id_det_gpio); |
643 | data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio); | |
1aedf3a7 HG |
644 | if ((data->id_det_gpio && data->id_det_irq < 0) || |
645 | (data->vbus_det_gpio && data->vbus_det_irq < 0)) | |
d2332303 HG |
646 | data->phy0_poll = true; |
647 | ||
648 | if (data->id_det_irq >= 0) { | |
649 | ret = devm_request_irq(dev, data->id_det_irq, | |
650 | sun4i_usb_phy0_id_vbus_det_irq, | |
651 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
652 | "usb0-id-det", data); | |
653 | if (ret) { | |
654 | dev_err(dev, "Err requesting id-det-irq: %d\n", ret); | |
655 | return ret; | |
656 | } | |
657 | } | |
658 | ||
659 | if (data->vbus_det_irq >= 0) { | |
660 | ret = devm_request_irq(dev, data->vbus_det_irq, | |
661 | sun4i_usb_phy0_id_vbus_det_irq, | |
662 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
663 | "usb0-vbus-det", data); | |
664 | if (ret) { | |
665 | dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret); | |
666 | data->vbus_det_irq = -1; | |
667 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
668 | return ret; | |
669 | } | |
670 | } | |
671 | ||
8665c18b HG |
672 | if (data->vbus_power_supply) { |
673 | data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify; | |
674 | data->vbus_power_nb.priority = 0; | |
675 | ret = power_supply_reg_notifier(&data->vbus_power_nb); | |
676 | if (ret) { | |
677 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
678 | return ret; | |
679 | } | |
680 | data->vbus_power_nb_registered = true; | |
681 | } | |
682 | ||
ba4bdc9e | 683 | phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate); |
d2332303 HG |
684 | if (IS_ERR(phy_provider)) { |
685 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
686 | return PTR_ERR(phy_provider); | |
687 | } | |
ba4bdc9e | 688 | |
d2332303 | 689 | return 0; |
ba4bdc9e HG |
690 | } |
691 | ||
692 | static const struct of_device_id sun4i_usb_phy_of_match[] = { | |
693 | { .compatible = "allwinner,sun4i-a10-usb-phy" }, | |
694 | { .compatible = "allwinner,sun5i-a13-usb-phy" }, | |
eadd4312 | 695 | { .compatible = "allwinner,sun6i-a31-usb-phy" }, |
ba4bdc9e | 696 | { .compatible = "allwinner,sun7i-a20-usb-phy" }, |
123dfdbc | 697 | { .compatible = "allwinner,sun8i-a23-usb-phy" }, |
fc1f45ed | 698 | { .compatible = "allwinner,sun8i-a33-usb-phy" }, |
ba4bdc9e HG |
699 | { }, |
700 | }; | |
701 | MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match); | |
702 | ||
703 | static struct platform_driver sun4i_usb_phy_driver = { | |
704 | .probe = sun4i_usb_phy_probe, | |
d2332303 | 705 | .remove = sun4i_usb_phy_remove, |
ba4bdc9e HG |
706 | .driver = { |
707 | .of_match_table = sun4i_usb_phy_of_match, | |
708 | .name = "sun4i-usb-phy", | |
ba4bdc9e HG |
709 | } |
710 | }; | |
711 | module_platform_driver(sun4i_usb_phy_driver); | |
712 | ||
713 | MODULE_DESCRIPTION("Allwinner sun4i USB phy driver"); | |
714 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); | |
715 | MODULE_LICENSE("GPL v2"); |