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Commit | Line | Data |
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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> | |
68dbc2ce | 35 | #include <linux/of_device.h> |
d2332303 | 36 | #include <linux/of_gpio.h> |
ba4bdc9e | 37 | #include <linux/phy/phy.h> |
24fe86a6 | 38 | #include <linux/phy/phy-sun4i-usb.h> |
ba4bdc9e | 39 | #include <linux/platform_device.h> |
8665c18b | 40 | #include <linux/power_supply.h> |
ba4bdc9e HG |
41 | #include <linux/regulator/consumer.h> |
42 | #include <linux/reset.h> | |
d2332303 | 43 | #include <linux/workqueue.h> |
ba4bdc9e HG |
44 | |
45 | #define REG_ISCR 0x00 | |
fc1f45ed | 46 | #define REG_PHYCTL_A10 0x04 |
ba4bdc9e HG |
47 | #define REG_PHYBIST 0x08 |
48 | #define REG_PHYTUNE 0x0c | |
fc1f45ed | 49 | #define REG_PHYCTL_A33 0x10 |
626a630e RH |
50 | #define REG_PHY_UNK_H3 0x20 |
51 | ||
52 | #define REG_PMU_UNK_H3 0x10 | |
ba4bdc9e HG |
53 | |
54 | #define PHYCTL_DATA BIT(7) | |
55 | ||
56 | #define SUNXI_AHB_ICHR8_EN BIT(10) | |
57 | #define SUNXI_AHB_INCR4_BURST_EN BIT(9) | |
58 | #define SUNXI_AHB_INCRX_ALIGN_EN BIT(8) | |
59 | #define SUNXI_ULPI_BYPASS_EN BIT(0) | |
60 | ||
d2332303 HG |
61 | /* ISCR, Interface Status and Control bits */ |
62 | #define ISCR_ID_PULLUP_EN (1 << 17) | |
63 | #define ISCR_DPDM_PULLUP_EN (1 << 16) | |
64 | /* sunxi has the phy id/vbus pins not connected, so we use the force bits */ | |
65 | #define ISCR_FORCE_ID_MASK (3 << 14) | |
66 | #define ISCR_FORCE_ID_LOW (2 << 14) | |
67 | #define ISCR_FORCE_ID_HIGH (3 << 14) | |
68 | #define ISCR_FORCE_VBUS_MASK (3 << 12) | |
69 | #define ISCR_FORCE_VBUS_LOW (2 << 12) | |
70 | #define ISCR_FORCE_VBUS_HIGH (3 << 12) | |
71 | ||
ba4bdc9e HG |
72 | /* Common Control Bits for Both PHYs */ |
73 | #define PHY_PLL_BW 0x03 | |
74 | #define PHY_RES45_CAL_EN 0x0c | |
75 | ||
76 | /* Private Control Bits for Each PHY */ | |
77 | #define PHY_TX_AMPLITUDE_TUNE 0x20 | |
78 | #define PHY_TX_SLEWRATE_TUNE 0x22 | |
79 | #define PHY_VBUSVALID_TH_SEL 0x25 | |
80 | #define PHY_PULLUP_RES_SEL 0x27 | |
81 | #define PHY_OTG_FUNC_EN 0x28 | |
82 | #define PHY_VBUS_DET_EN 0x29 | |
83 | #define PHY_DISCON_TH_SEL 0x2a | |
24fe86a6 | 84 | #define PHY_SQUELCH_DETECT 0x3c |
ba4bdc9e | 85 | |
626a630e | 86 | #define MAX_PHYS 4 |
ba4bdc9e | 87 | |
d2332303 HG |
88 | /* |
89 | * Note do not raise the debounce time, we must report Vusb high within 100ms | |
90 | * otherwise we get Vbus errors | |
91 | */ | |
92 | #define DEBOUNCE_TIME msecs_to_jiffies(50) | |
93 | #define POLL_TIME msecs_to_jiffies(250) | |
94 | ||
68dbc2ce HG |
95 | enum sun4i_usb_phy_type { |
96 | sun4i_a10_phy, | |
97 | sun8i_a33_phy, | |
626a630e | 98 | sun8i_h3_phy, |
68dbc2ce HG |
99 | }; |
100 | ||
101 | struct sun4i_usb_phy_cfg { | |
102 | int num_phys; | |
103 | enum sun4i_usb_phy_type type; | |
104 | u32 disc_thresh; | |
105 | u8 phyctl_offset; | |
106 | bool dedicated_clocks; | |
107 | }; | |
108 | ||
ba4bdc9e | 109 | struct sun4i_usb_phy_data { |
ba4bdc9e | 110 | void __iomem *base; |
68dbc2ce | 111 | const struct sun4i_usb_phy_cfg *cfg; |
ba4bdc9e | 112 | struct mutex mutex; |
ba4bdc9e HG |
113 | struct sun4i_usb_phy { |
114 | struct phy *phy; | |
115 | void __iomem *pmu; | |
116 | struct regulator *vbus; | |
117 | struct reset_control *reset; | |
eadd4312 | 118 | struct clk *clk; |
d2332303 | 119 | bool regulator_on; |
ba4bdc9e HG |
120 | int index; |
121 | } phys[MAX_PHYS]; | |
d2332303 | 122 | /* phy0 / otg related variables */ |
1a52abe6 | 123 | struct extcon_dev *extcon; |
d2332303 HG |
124 | bool phy0_init; |
125 | bool phy0_poll; | |
126 | struct gpio_desc *id_det_gpio; | |
127 | struct gpio_desc *vbus_det_gpio; | |
8665c18b HG |
128 | struct power_supply *vbus_power_supply; |
129 | struct notifier_block vbus_power_nb; | |
130 | bool vbus_power_nb_registered; | |
d2332303 HG |
131 | int id_det_irq; |
132 | int vbus_det_irq; | |
133 | int id_det; | |
134 | int vbus_det; | |
135 | struct delayed_work detect; | |
ba4bdc9e HG |
136 | }; |
137 | ||
138 | #define to_sun4i_usb_phy_data(phy) \ | |
139 | container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index]) | |
140 | ||
d2332303 HG |
141 | static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set) |
142 | { | |
143 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
144 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
145 | u32 iscr; | |
146 | ||
147 | iscr = readl(data->base + REG_ISCR); | |
148 | iscr &= ~clr; | |
149 | iscr |= set; | |
150 | writel(iscr, data->base + REG_ISCR); | |
151 | } | |
152 | ||
153 | static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val) | |
154 | { | |
155 | if (val) | |
156 | val = ISCR_FORCE_ID_HIGH; | |
157 | else | |
158 | val = ISCR_FORCE_ID_LOW; | |
159 | ||
160 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val); | |
161 | } | |
162 | ||
163 | static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val) | |
164 | { | |
165 | if (val) | |
166 | val = ISCR_FORCE_VBUS_HIGH; | |
167 | else | |
168 | val = ISCR_FORCE_VBUS_LOW; | |
169 | ||
170 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val); | |
171 | } | |
172 | ||
ba4bdc9e HG |
173 | static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data, |
174 | int len) | |
175 | { | |
176 | struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy); | |
177 | u32 temp, usbc_bit = BIT(phy->index * 2); | |
d99cb378 | 178 | void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset; |
ba4bdc9e HG |
179 | int i; |
180 | ||
181 | mutex_lock(&phy_data->mutex); | |
182 | ||
68dbc2ce | 183 | if (phy_data->cfg->type == sun8i_a33_phy) { |
fc1f45ed HG |
184 | /* A33 needs us to set phyctl to 0 explicitly */ |
185 | writel(0, phyctl); | |
fc1f45ed HG |
186 | } |
187 | ||
ba4bdc9e | 188 | for (i = 0; i < len; i++) { |
fc1f45ed | 189 | temp = readl(phyctl); |
ba4bdc9e HG |
190 | |
191 | /* clear the address portion */ | |
192 | temp &= ~(0xff << 8); | |
193 | ||
194 | /* set the address */ | |
195 | temp |= ((addr + i) << 8); | |
fc1f45ed | 196 | writel(temp, phyctl); |
ba4bdc9e HG |
197 | |
198 | /* set the data bit and clear usbc bit*/ | |
fc1f45ed | 199 | temp = readb(phyctl); |
ba4bdc9e HG |
200 | if (data & 0x1) |
201 | temp |= PHYCTL_DATA; | |
202 | else | |
203 | temp &= ~PHYCTL_DATA; | |
204 | temp &= ~usbc_bit; | |
fc1f45ed | 205 | writeb(temp, phyctl); |
ba4bdc9e HG |
206 | |
207 | /* pulse usbc_bit */ | |
fc1f45ed | 208 | temp = readb(phyctl); |
ba4bdc9e | 209 | temp |= usbc_bit; |
fc1f45ed | 210 | writeb(temp, phyctl); |
ba4bdc9e | 211 | |
fc1f45ed | 212 | temp = readb(phyctl); |
ba4bdc9e | 213 | temp &= ~usbc_bit; |
fc1f45ed | 214 | writeb(temp, phyctl); |
ba4bdc9e HG |
215 | |
216 | data >>= 1; | |
217 | } | |
218 | mutex_unlock(&phy_data->mutex); | |
219 | } | |
220 | ||
221 | static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable) | |
222 | { | |
223 | u32 bits, reg_value; | |
224 | ||
225 | if (!phy->pmu) | |
226 | return; | |
227 | ||
228 | bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN | | |
229 | SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN; | |
230 | ||
231 | reg_value = readl(phy->pmu); | |
232 | ||
233 | if (enable) | |
234 | reg_value |= bits; | |
235 | else | |
236 | reg_value &= ~bits; | |
237 | ||
238 | writel(reg_value, phy->pmu); | |
239 | } | |
240 | ||
241 | static int sun4i_usb_phy_init(struct phy *_phy) | |
242 | { | |
243 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
244 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
245 | int ret; | |
626a630e | 246 | u32 val; |
ba4bdc9e | 247 | |
eadd4312 | 248 | ret = clk_prepare_enable(phy->clk); |
ba4bdc9e HG |
249 | if (ret) |
250 | return ret; | |
251 | ||
252 | ret = reset_control_deassert(phy->reset); | |
253 | if (ret) { | |
eadd4312 | 254 | clk_disable_unprepare(phy->clk); |
ba4bdc9e HG |
255 | return ret; |
256 | } | |
257 | ||
626a630e RH |
258 | if (data->cfg->type == sun8i_h3_phy) { |
259 | if (phy->index == 0) { | |
260 | val = readl(data->base + REG_PHY_UNK_H3); | |
261 | writel(val & ~1, data->base + REG_PHY_UNK_H3); | |
262 | } | |
263 | ||
264 | val = readl(phy->pmu + REG_PMU_UNK_H3); | |
265 | writel(val & ~2, phy->pmu + REG_PMU_UNK_H3); | |
266 | } else { | |
267 | /* Enable USB 45 Ohm resistor calibration */ | |
268 | if (phy->index == 0) | |
269 | sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1); | |
6827a46f | 270 | |
626a630e RH |
271 | /* Adjust PHY's magnitude and rate */ |
272 | sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5); | |
ba4bdc9e | 273 | |
626a630e RH |
274 | /* Disconnect threshold adjustment */ |
275 | sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, | |
276 | data->cfg->disc_thresh, 2); | |
277 | } | |
ba4bdc9e HG |
278 | |
279 | sun4i_usb_phy_passby(phy, 1); | |
280 | ||
d2332303 HG |
281 | if (phy->index == 0) { |
282 | data->phy0_init = true; | |
283 | ||
284 | /* Enable pull-ups */ | |
285 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN); | |
286 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN); | |
287 | ||
288 | if (data->id_det_gpio) { | |
289 | /* OTG mode, force ISCR and cable state updates */ | |
290 | data->id_det = -1; | |
291 | data->vbus_det = -1; | |
292 | queue_delayed_work(system_wq, &data->detect, 0); | |
293 | } else { | |
294 | /* Host only mode */ | |
295 | sun4i_usb_phy0_set_id_detect(_phy, 0); | |
296 | sun4i_usb_phy0_set_vbus_detect(_phy, 1); | |
297 | } | |
298 | } | |
299 | ||
ba4bdc9e HG |
300 | return 0; |
301 | } | |
302 | ||
303 | static int sun4i_usb_phy_exit(struct phy *_phy) | |
304 | { | |
305 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
306 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
307 | ||
308 | if (phy->index == 0) { | |
309 | /* Disable pull-ups */ | |
310 | sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0); | |
311 | sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0); | |
312 | data->phy0_init = false; | |
313 | } | |
ba4bdc9e HG |
314 | |
315 | sun4i_usb_phy_passby(phy, 0); | |
316 | reset_control_assert(phy->reset); | |
eadd4312 | 317 | clk_disable_unprepare(phy->clk); |
ba4bdc9e HG |
318 | |
319 | return 0; | |
320 | } | |
321 | ||
3d772c4a HG |
322 | static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data) |
323 | { | |
324 | if (data->vbus_det_gpio) | |
325 | return gpiod_get_value_cansleep(data->vbus_det_gpio); | |
326 | ||
327 | if (data->vbus_power_supply) { | |
328 | union power_supply_propval val; | |
329 | int r; | |
330 | ||
331 | r = power_supply_get_property(data->vbus_power_supply, | |
332 | POWER_SUPPLY_PROP_PRESENT, &val); | |
333 | if (r == 0) | |
334 | return val.intval; | |
335 | } | |
336 | ||
337 | /* Fallback: report vbus as high */ | |
338 | return 1; | |
339 | } | |
340 | ||
341 | static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data) | |
342 | { | |
343 | return data->vbus_det_gpio || data->vbus_power_supply; | |
344 | } | |
345 | ||
ba4bdc9e HG |
346 | static int sun4i_usb_phy_power_on(struct phy *_phy) |
347 | { | |
348 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
349 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
350 | int ret; | |
351 | ||
352 | if (!phy->vbus || phy->regulator_on) | |
353 | return 0; | |
354 | ||
355 | /* For phy0 only turn on Vbus if we don't have an ext. Vbus */ | |
8083526e HG |
356 | if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) && |
357 | data->vbus_det) | |
d2332303 | 358 | return 0; |
ba4bdc9e | 359 | |
d2332303 HG |
360 | ret = regulator_enable(phy->vbus); |
361 | if (ret) | |
362 | return ret; | |
ba4bdc9e | 363 | |
d2332303 | 364 | phy->regulator_on = true; |
ba4bdc9e | 365 | |
d2332303 | 366 | /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */ |
1aedf3a7 | 367 | if (phy->index == 0 && data->vbus_det_gpio && data->phy0_poll) |
d2332303 | 368 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); |
ba4bdc9e | 369 | |
d2332303 | 370 | return 0; |
ba4bdc9e HG |
371 | } |
372 | ||
373 | static int sun4i_usb_phy_power_off(struct phy *_phy) | |
374 | { | |
375 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
376 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
377 | ||
378 | if (!phy->vbus || !phy->regulator_on) | |
379 | return 0; | |
ba4bdc9e | 380 | |
d2332303 HG |
381 | regulator_disable(phy->vbus); |
382 | phy->regulator_on = false; | |
ba4bdc9e | 383 | |
d2332303 HG |
384 | /* |
385 | * phy0 vbus typically slowly discharges, sometimes this causes the | |
386 | * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan. | |
387 | */ | |
1aedf3a7 | 388 | if (phy->index == 0 && data->vbus_det_gpio && !data->phy0_poll) |
d2332303 | 389 | mod_delayed_work(system_wq, &data->detect, POLL_TIME); |
ba4bdc9e HG |
390 | |
391 | return 0; | |
392 | } | |
393 | ||
24fe86a6 HG |
394 | void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled) |
395 | { | |
396 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
397 | ||
398 | sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2); | |
399 | } | |
7167bf8b | 400 | EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect); |
24fe86a6 | 401 | |
4a9e5ca1 | 402 | static const struct phy_ops sun4i_usb_phy_ops = { |
ba4bdc9e HG |
403 | .init = sun4i_usb_phy_init, |
404 | .exit = sun4i_usb_phy_exit, | |
405 | .power_on = sun4i_usb_phy_power_on, | |
406 | .power_off = sun4i_usb_phy_power_off, | |
407 | .owner = THIS_MODULE, | |
408 | }; | |
409 | ||
d2332303 HG |
410 | static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) |
411 | { | |
412 | struct sun4i_usb_phy_data *data = | |
413 | container_of(work, struct sun4i_usb_phy_data, detect.work); | |
414 | struct phy *phy0 = data->phys[0].phy; | |
1a52abe6 | 415 | int id_det, vbus_det, id_notify = 0, vbus_notify = 0; |
d2332303 HG |
416 | |
417 | id_det = gpiod_get_value_cansleep(data->id_det_gpio); | |
8665c18b | 418 | vbus_det = sun4i_usb_phy0_get_vbus_det(data); |
d2332303 HG |
419 | |
420 | mutex_lock(&phy0->mutex); | |
421 | ||
422 | if (!data->phy0_init) { | |
423 | mutex_unlock(&phy0->mutex); | |
424 | return; | |
425 | } | |
426 | ||
427 | if (id_det != data->id_det) { | |
1aedf3a7 HG |
428 | /* |
429 | * When a host cable (id == 0) gets plugged in on systems | |
430 | * without vbus detection report vbus low for long enough for | |
431 | * the musb-ip to end the current device session. | |
432 | */ | |
8665c18b | 433 | if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) { |
1aedf3a7 HG |
434 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); |
435 | msleep(200); | |
436 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
437 | } | |
d2332303 HG |
438 | sun4i_usb_phy0_set_id_detect(phy0, id_det); |
439 | data->id_det = id_det; | |
1a52abe6 | 440 | id_notify = 1; |
d2332303 HG |
441 | } |
442 | ||
443 | if (vbus_det != data->vbus_det) { | |
444 | sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det); | |
445 | data->vbus_det = vbus_det; | |
1a52abe6 | 446 | vbus_notify = 1; |
d2332303 HG |
447 | } |
448 | ||
449 | mutex_unlock(&phy0->mutex); | |
450 | ||
1aedf3a7 | 451 | if (id_notify) { |
1a52abe6 HG |
452 | extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST, |
453 | !id_det); | |
1aedf3a7 HG |
454 | /* |
455 | * When a host cable gets unplugged (id == 1) on systems | |
456 | * without vbus detection report vbus low for long enough to | |
457 | * the musb-ip to end the current host session. | |
458 | */ | |
8665c18b | 459 | if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) { |
1aedf3a7 HG |
460 | mutex_lock(&phy0->mutex); |
461 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); | |
462 | msleep(1000); | |
463 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
464 | mutex_unlock(&phy0->mutex); | |
465 | } | |
466 | } | |
1a52abe6 HG |
467 | |
468 | if (vbus_notify) | |
469 | extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det); | |
470 | ||
d2332303 HG |
471 | if (data->phy0_poll) |
472 | queue_delayed_work(system_wq, &data->detect, POLL_TIME); | |
473 | } | |
474 | ||
475 | static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id) | |
476 | { | |
477 | struct sun4i_usb_phy_data *data = dev_id; | |
478 | ||
479 | /* vbus or id changed, let the pins settle and then scan them */ | |
480 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
481 | ||
482 | return IRQ_HANDLED; | |
483 | } | |
484 | ||
8665c18b HG |
485 | static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb, |
486 | unsigned long val, void *v) | |
487 | { | |
488 | struct sun4i_usb_phy_data *data = | |
489 | container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb); | |
490 | struct power_supply *psy = v; | |
491 | ||
492 | /* Properties on the vbus_power_supply changed, scan vbus_det */ | |
493 | if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply) | |
494 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
495 | ||
496 | return NOTIFY_OK; | |
497 | } | |
498 | ||
ba4bdc9e HG |
499 | static struct phy *sun4i_usb_phy_xlate(struct device *dev, |
500 | struct of_phandle_args *args) | |
501 | { | |
502 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
503 | ||
68dbc2ce | 504 | if (args->args[0] >= data->cfg->num_phys) |
ba4bdc9e HG |
505 | return ERR_PTR(-ENODEV); |
506 | ||
507 | return data->phys[args->args[0]].phy; | |
508 | } | |
509 | ||
d2332303 HG |
510 | static int sun4i_usb_phy_remove(struct platform_device *pdev) |
511 | { | |
512 | struct device *dev = &pdev->dev; | |
513 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
514 | ||
8665c18b HG |
515 | if (data->vbus_power_nb_registered) |
516 | power_supply_unreg_notifier(&data->vbus_power_nb); | |
04e59a02 | 517 | if (data->id_det_irq > 0) |
d2332303 | 518 | devm_free_irq(dev, data->id_det_irq, data); |
04e59a02 | 519 | if (data->vbus_det_irq > 0) |
d2332303 HG |
520 | devm_free_irq(dev, data->vbus_det_irq, data); |
521 | ||
522 | cancel_delayed_work_sync(&data->detect); | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
1a52abe6 HG |
527 | static const unsigned int sun4i_usb_phy0_cable[] = { |
528 | EXTCON_USB, | |
529 | EXTCON_USB_HOST, | |
530 | EXTCON_NONE, | |
531 | }; | |
532 | ||
ba4bdc9e HG |
533 | static int sun4i_usb_phy_probe(struct platform_device *pdev) |
534 | { | |
535 | struct sun4i_usb_phy_data *data; | |
536 | struct device *dev = &pdev->dev; | |
537 | struct device_node *np = dev->of_node; | |
ba4bdc9e | 538 | struct phy_provider *phy_provider; |
ba4bdc9e | 539 | struct resource *res; |
d2332303 | 540 | int i, ret; |
ba4bdc9e HG |
541 | |
542 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
543 | if (!data) | |
544 | return -ENOMEM; | |
545 | ||
546 | mutex_init(&data->mutex); | |
d2332303 HG |
547 | INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan); |
548 | dev_set_drvdata(dev, data); | |
68dbc2ce HG |
549 | data->cfg = of_device_get_match_data(dev); |
550 | if (!data->cfg) | |
551 | return -EINVAL; | |
fc1f45ed | 552 | |
ba4bdc9e HG |
553 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl"); |
554 | data->base = devm_ioremap_resource(dev, res); | |
555 | if (IS_ERR(data->base)) | |
556 | return PTR_ERR(data->base); | |
557 | ||
b2dfc34c AL |
558 | data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det", |
559 | GPIOD_IN); | |
560 | if (IS_ERR(data->id_det_gpio)) | |
561 | return PTR_ERR(data->id_det_gpio); | |
562 | ||
563 | data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det", | |
564 | GPIOD_IN); | |
565 | if (IS_ERR(data->vbus_det_gpio)) | |
566 | return PTR_ERR(data->vbus_det_gpio); | |
d2332303 | 567 | |
8665c18b HG |
568 | if (of_find_property(np, "usb0_vbus_power-supply", NULL)) { |
569 | data->vbus_power_supply = devm_power_supply_get_by_phandle(dev, | |
570 | "usb0_vbus_power-supply"); | |
571 | if (IS_ERR(data->vbus_power_supply)) | |
572 | return PTR_ERR(data->vbus_power_supply); | |
573 | ||
574 | if (!data->vbus_power_supply) | |
575 | return -EPROBE_DEFER; | |
576 | } | |
577 | ||
1aedf3a7 | 578 | /* vbus_det without id_det makes no sense, and is not supported */ |
8665c18b | 579 | if (sun4i_usb_phy0_have_vbus_det(data) && !data->id_det_gpio) { |
1aedf3a7 | 580 | dev_err(dev, "usb0_id_det missing or invalid\n"); |
d2332303 HG |
581 | return -ENODEV; |
582 | } | |
583 | ||
1a52abe6 HG |
584 | if (data->id_det_gpio) { |
585 | data->extcon = devm_extcon_dev_allocate(dev, | |
586 | sun4i_usb_phy0_cable); | |
587 | if (IS_ERR(data->extcon)) | |
588 | return PTR_ERR(data->extcon); | |
589 | ||
590 | ret = devm_extcon_dev_register(dev, data->extcon); | |
591 | if (ret) { | |
592 | dev_err(dev, "failed to register extcon: %d\n", ret); | |
593 | return ret; | |
594 | } | |
595 | } | |
596 | ||
68dbc2ce | 597 | for (i = 0; i < data->cfg->num_phys; i++) { |
2a7f9982 MR |
598 | struct sun4i_usb_phy *phy = data->phys + i; |
599 | char name[16]; | |
600 | ||
ba4bdc9e | 601 | snprintf(name, sizeof(name), "usb%d_vbus", i); |
2a7f9982 MR |
602 | phy->vbus = devm_regulator_get_optional(dev, name); |
603 | if (IS_ERR(phy->vbus)) { | |
604 | if (PTR_ERR(phy->vbus) == -EPROBE_DEFER) | |
ba4bdc9e | 605 | return -EPROBE_DEFER; |
2a7f9982 | 606 | phy->vbus = NULL; |
ba4bdc9e HG |
607 | } |
608 | ||
68dbc2ce | 609 | if (data->cfg->dedicated_clocks) |
eadd4312 MR |
610 | snprintf(name, sizeof(name), "usb%d_phy", i); |
611 | else | |
612 | strlcpy(name, "usb_phy", sizeof(name)); | |
613 | ||
614 | phy->clk = devm_clk_get(dev, name); | |
615 | if (IS_ERR(phy->clk)) { | |
616 | dev_err(dev, "failed to get clock %s\n", name); | |
617 | return PTR_ERR(phy->clk); | |
618 | } | |
619 | ||
ba4bdc9e | 620 | snprintf(name, sizeof(name), "usb%d_reset", i); |
2a7f9982 MR |
621 | phy->reset = devm_reset_control_get(dev, name); |
622 | if (IS_ERR(phy->reset)) { | |
ba4bdc9e | 623 | dev_err(dev, "failed to get reset %s\n", name); |
2a7f9982 | 624 | return PTR_ERR(phy->reset); |
ba4bdc9e HG |
625 | } |
626 | ||
627 | if (i) { /* No pmu for usbc0 */ | |
628 | snprintf(name, sizeof(name), "pmu%d", i); | |
629 | res = platform_get_resource_byname(pdev, | |
630 | IORESOURCE_MEM, name); | |
2a7f9982 MR |
631 | phy->pmu = devm_ioremap_resource(dev, res); |
632 | if (IS_ERR(phy->pmu)) | |
633 | return PTR_ERR(phy->pmu); | |
ba4bdc9e HG |
634 | } |
635 | ||
dbc98635 | 636 | phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops); |
2a7f9982 | 637 | if (IS_ERR(phy->phy)) { |
ba4bdc9e | 638 | dev_err(dev, "failed to create PHY %d\n", i); |
2a7f9982 | 639 | return PTR_ERR(phy->phy); |
ba4bdc9e HG |
640 | } |
641 | ||
2a7f9982 MR |
642 | phy->index = i; |
643 | phy_set_drvdata(phy->phy, &data->phys[i]); | |
ba4bdc9e HG |
644 | } |
645 | ||
d2332303 HG |
646 | data->id_det_irq = gpiod_to_irq(data->id_det_gpio); |
647 | data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio); | |
5cf700ac QS |
648 | if ((data->id_det_gpio && data->id_det_irq <= 0) || |
649 | (data->vbus_det_gpio && data->vbus_det_irq <= 0)) | |
d2332303 HG |
650 | data->phy0_poll = true; |
651 | ||
5cf700ac | 652 | if (data->id_det_irq > 0) { |
d2332303 HG |
653 | ret = devm_request_irq(dev, data->id_det_irq, |
654 | sun4i_usb_phy0_id_vbus_det_irq, | |
655 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
656 | "usb0-id-det", data); | |
657 | if (ret) { | |
658 | dev_err(dev, "Err requesting id-det-irq: %d\n", ret); | |
659 | return ret; | |
660 | } | |
661 | } | |
662 | ||
5cf700ac | 663 | if (data->vbus_det_irq > 0) { |
d2332303 HG |
664 | ret = devm_request_irq(dev, data->vbus_det_irq, |
665 | sun4i_usb_phy0_id_vbus_det_irq, | |
666 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
667 | "usb0-vbus-det", data); | |
668 | if (ret) { | |
669 | dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret); | |
670 | data->vbus_det_irq = -1; | |
671 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
672 | return ret; | |
673 | } | |
674 | } | |
675 | ||
8665c18b HG |
676 | if (data->vbus_power_supply) { |
677 | data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify; | |
678 | data->vbus_power_nb.priority = 0; | |
679 | ret = power_supply_reg_notifier(&data->vbus_power_nb); | |
680 | if (ret) { | |
681 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
682 | return ret; | |
683 | } | |
684 | data->vbus_power_nb_registered = true; | |
685 | } | |
686 | ||
ba4bdc9e | 687 | phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate); |
d2332303 HG |
688 | if (IS_ERR(phy_provider)) { |
689 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
690 | return PTR_ERR(phy_provider); | |
691 | } | |
ba4bdc9e | 692 | |
d2332303 | 693 | return 0; |
ba4bdc9e HG |
694 | } |
695 | ||
68dbc2ce HG |
696 | static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = { |
697 | .num_phys = 3, | |
698 | .type = sun4i_a10_phy, | |
699 | .disc_thresh = 3, | |
700 | .phyctl_offset = REG_PHYCTL_A10, | |
701 | .dedicated_clocks = false, | |
702 | }; | |
703 | ||
704 | static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = { | |
705 | .num_phys = 2, | |
706 | .type = sun4i_a10_phy, | |
707 | .disc_thresh = 2, | |
708 | .phyctl_offset = REG_PHYCTL_A10, | |
709 | .dedicated_clocks = false, | |
710 | }; | |
711 | ||
712 | static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = { | |
713 | .num_phys = 3, | |
714 | .type = sun4i_a10_phy, | |
715 | .disc_thresh = 3, | |
716 | .phyctl_offset = REG_PHYCTL_A10, | |
717 | .dedicated_clocks = true, | |
718 | }; | |
719 | ||
720 | static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = { | |
721 | .num_phys = 3, | |
722 | .type = sun4i_a10_phy, | |
723 | .disc_thresh = 2, | |
724 | .phyctl_offset = REG_PHYCTL_A10, | |
725 | .dedicated_clocks = false, | |
726 | }; | |
727 | ||
728 | static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = { | |
729 | .num_phys = 2, | |
730 | .type = sun4i_a10_phy, | |
731 | .disc_thresh = 3, | |
732 | .phyctl_offset = REG_PHYCTL_A10, | |
733 | .dedicated_clocks = true, | |
734 | }; | |
735 | ||
736 | static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = { | |
737 | .num_phys = 2, | |
738 | .type = sun8i_a33_phy, | |
739 | .disc_thresh = 3, | |
740 | .phyctl_offset = REG_PHYCTL_A33, | |
741 | .dedicated_clocks = true, | |
742 | }; | |
743 | ||
626a630e RH |
744 | static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = { |
745 | .num_phys = 4, | |
746 | .type = sun8i_h3_phy, | |
747 | .disc_thresh = 3, | |
748 | .dedicated_clocks = true, | |
749 | }; | |
750 | ||
ba4bdc9e | 751 | static const struct of_device_id sun4i_usb_phy_of_match[] = { |
68dbc2ce HG |
752 | { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg }, |
753 | { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg }, | |
754 | { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg }, | |
755 | { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg }, | |
756 | { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg }, | |
757 | { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg }, | |
626a630e | 758 | { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg }, |
ba4bdc9e HG |
759 | { }, |
760 | }; | |
761 | MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match); | |
762 | ||
763 | static struct platform_driver sun4i_usb_phy_driver = { | |
764 | .probe = sun4i_usb_phy_probe, | |
d2332303 | 765 | .remove = sun4i_usb_phy_remove, |
ba4bdc9e HG |
766 | .driver = { |
767 | .of_match_table = sun4i_usb_phy_of_match, | |
768 | .name = "sun4i-usb-phy", | |
ba4bdc9e HG |
769 | } |
770 | }; | |
771 | module_platform_driver(sun4i_usb_phy_driver); | |
772 | ||
773 | MODULE_DESCRIPTION("Allwinner sun4i USB phy driver"); | |
774 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); | |
775 | MODULE_LICENSE("GPL v2"); |