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> | |
72c6187f | 43 | #include <linux/spinlock.h> |
b33ecca8 | 44 | #include <linux/usb/of.h> |
d2332303 | 45 | #include <linux/workqueue.h> |
ba4bdc9e HG |
46 | |
47 | #define REG_ISCR 0x00 | |
fc1f45ed | 48 | #define REG_PHYCTL_A10 0x04 |
ba4bdc9e HG |
49 | #define REG_PHYBIST 0x08 |
50 | #define REG_PHYTUNE 0x0c | |
fc1f45ed | 51 | #define REG_PHYCTL_A33 0x10 |
626a630e RH |
52 | #define REG_PHY_UNK_H3 0x20 |
53 | ||
54 | #define REG_PMU_UNK_H3 0x10 | |
ba4bdc9e HG |
55 | |
56 | #define PHYCTL_DATA BIT(7) | |
57 | ||
58 | #define SUNXI_AHB_ICHR8_EN BIT(10) | |
59 | #define SUNXI_AHB_INCR4_BURST_EN BIT(9) | |
60 | #define SUNXI_AHB_INCRX_ALIGN_EN BIT(8) | |
61 | #define SUNXI_ULPI_BYPASS_EN BIT(0) | |
62 | ||
d2332303 HG |
63 | /* ISCR, Interface Status and Control bits */ |
64 | #define ISCR_ID_PULLUP_EN (1 << 17) | |
65 | #define ISCR_DPDM_PULLUP_EN (1 << 16) | |
66 | /* sunxi has the phy id/vbus pins not connected, so we use the force bits */ | |
67 | #define ISCR_FORCE_ID_MASK (3 << 14) | |
68 | #define ISCR_FORCE_ID_LOW (2 << 14) | |
69 | #define ISCR_FORCE_ID_HIGH (3 << 14) | |
70 | #define ISCR_FORCE_VBUS_MASK (3 << 12) | |
71 | #define ISCR_FORCE_VBUS_LOW (2 << 12) | |
72 | #define ISCR_FORCE_VBUS_HIGH (3 << 12) | |
73 | ||
ba4bdc9e HG |
74 | /* Common Control Bits for Both PHYs */ |
75 | #define PHY_PLL_BW 0x03 | |
76 | #define PHY_RES45_CAL_EN 0x0c | |
77 | ||
78 | /* Private Control Bits for Each PHY */ | |
79 | #define PHY_TX_AMPLITUDE_TUNE 0x20 | |
80 | #define PHY_TX_SLEWRATE_TUNE 0x22 | |
81 | #define PHY_VBUSVALID_TH_SEL 0x25 | |
82 | #define PHY_PULLUP_RES_SEL 0x27 | |
83 | #define PHY_OTG_FUNC_EN 0x28 | |
84 | #define PHY_VBUS_DET_EN 0x29 | |
85 | #define PHY_DISCON_TH_SEL 0x2a | |
24fe86a6 | 86 | #define PHY_SQUELCH_DETECT 0x3c |
ba4bdc9e | 87 | |
626a630e | 88 | #define MAX_PHYS 4 |
ba4bdc9e | 89 | |
d2332303 HG |
90 | /* |
91 | * Note do not raise the debounce time, we must report Vusb high within 100ms | |
92 | * otherwise we get Vbus errors | |
93 | */ | |
94 | #define DEBOUNCE_TIME msecs_to_jiffies(50) | |
95 | #define POLL_TIME msecs_to_jiffies(250) | |
96 | ||
68dbc2ce HG |
97 | enum sun4i_usb_phy_type { |
98 | sun4i_a10_phy, | |
91d96f06 | 99 | sun6i_a31_phy, |
68dbc2ce | 100 | sun8i_a33_phy, |
626a630e | 101 | sun8i_h3_phy, |
68dbc2ce HG |
102 | }; |
103 | ||
104 | struct sun4i_usb_phy_cfg { | |
105 | int num_phys; | |
106 | enum sun4i_usb_phy_type type; | |
107 | u32 disc_thresh; | |
108 | u8 phyctl_offset; | |
109 | bool dedicated_clocks; | |
110 | }; | |
111 | ||
ba4bdc9e | 112 | struct sun4i_usb_phy_data { |
ba4bdc9e | 113 | void __iomem *base; |
68dbc2ce | 114 | const struct sun4i_usb_phy_cfg *cfg; |
b33ecca8 | 115 | enum usb_dr_mode dr_mode; |
72c6187f | 116 | spinlock_t reg_lock; /* guard access to phyctl reg */ |
ba4bdc9e HG |
117 | struct sun4i_usb_phy { |
118 | struct phy *phy; | |
119 | void __iomem *pmu; | |
120 | struct regulator *vbus; | |
121 | struct reset_control *reset; | |
eadd4312 | 122 | struct clk *clk; |
d2332303 | 123 | bool regulator_on; |
ba4bdc9e HG |
124 | int index; |
125 | } phys[MAX_PHYS]; | |
b33ecca8 | 126 | int first_phy; |
d2332303 | 127 | /* phy0 / otg related variables */ |
1a52abe6 | 128 | struct extcon_dev *extcon; |
d2332303 | 129 | bool phy0_init; |
d2332303 HG |
130 | struct gpio_desc *id_det_gpio; |
131 | struct gpio_desc *vbus_det_gpio; | |
8665c18b HG |
132 | struct power_supply *vbus_power_supply; |
133 | struct notifier_block vbus_power_nb; | |
134 | bool vbus_power_nb_registered; | |
d2332303 HG |
135 | int id_det_irq; |
136 | int vbus_det_irq; | |
137 | int id_det; | |
138 | int vbus_det; | |
139 | struct delayed_work detect; | |
ba4bdc9e HG |
140 | }; |
141 | ||
142 | #define to_sun4i_usb_phy_data(phy) \ | |
143 | container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index]) | |
144 | ||
d2332303 HG |
145 | static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set) |
146 | { | |
147 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
148 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
149 | u32 iscr; | |
150 | ||
151 | iscr = readl(data->base + REG_ISCR); | |
152 | iscr &= ~clr; | |
153 | iscr |= set; | |
154 | writel(iscr, data->base + REG_ISCR); | |
155 | } | |
156 | ||
157 | static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val) | |
158 | { | |
159 | if (val) | |
160 | val = ISCR_FORCE_ID_HIGH; | |
161 | else | |
162 | val = ISCR_FORCE_ID_LOW; | |
163 | ||
164 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val); | |
165 | } | |
166 | ||
167 | static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val) | |
168 | { | |
169 | if (val) | |
170 | val = ISCR_FORCE_VBUS_HIGH; | |
171 | else | |
172 | val = ISCR_FORCE_VBUS_LOW; | |
173 | ||
174 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val); | |
175 | } | |
176 | ||
ba4bdc9e HG |
177 | static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data, |
178 | int len) | |
179 | { | |
180 | struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy); | |
181 | u32 temp, usbc_bit = BIT(phy->index * 2); | |
d99cb378 | 182 | void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset; |
72c6187f | 183 | unsigned long flags; |
ba4bdc9e HG |
184 | int i; |
185 | ||
72c6187f | 186 | spin_lock_irqsave(&phy_data->reg_lock, flags); |
ba4bdc9e | 187 | |
68dbc2ce | 188 | if (phy_data->cfg->type == sun8i_a33_phy) { |
fc1f45ed HG |
189 | /* A33 needs us to set phyctl to 0 explicitly */ |
190 | writel(0, phyctl); | |
fc1f45ed HG |
191 | } |
192 | ||
ba4bdc9e | 193 | for (i = 0; i < len; i++) { |
fc1f45ed | 194 | temp = readl(phyctl); |
ba4bdc9e HG |
195 | |
196 | /* clear the address portion */ | |
197 | temp &= ~(0xff << 8); | |
198 | ||
199 | /* set the address */ | |
200 | temp |= ((addr + i) << 8); | |
fc1f45ed | 201 | writel(temp, phyctl); |
ba4bdc9e HG |
202 | |
203 | /* set the data bit and clear usbc bit*/ | |
fc1f45ed | 204 | temp = readb(phyctl); |
ba4bdc9e HG |
205 | if (data & 0x1) |
206 | temp |= PHYCTL_DATA; | |
207 | else | |
208 | temp &= ~PHYCTL_DATA; | |
209 | temp &= ~usbc_bit; | |
fc1f45ed | 210 | writeb(temp, phyctl); |
ba4bdc9e HG |
211 | |
212 | /* pulse usbc_bit */ | |
fc1f45ed | 213 | temp = readb(phyctl); |
ba4bdc9e | 214 | temp |= usbc_bit; |
fc1f45ed | 215 | writeb(temp, phyctl); |
ba4bdc9e | 216 | |
fc1f45ed | 217 | temp = readb(phyctl); |
ba4bdc9e | 218 | temp &= ~usbc_bit; |
fc1f45ed | 219 | writeb(temp, phyctl); |
ba4bdc9e HG |
220 | |
221 | data >>= 1; | |
222 | } | |
72c6187f CYT |
223 | |
224 | spin_unlock_irqrestore(&phy_data->reg_lock, flags); | |
ba4bdc9e HG |
225 | } |
226 | ||
227 | static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable) | |
228 | { | |
229 | u32 bits, reg_value; | |
230 | ||
231 | if (!phy->pmu) | |
232 | return; | |
233 | ||
234 | bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN | | |
235 | SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN; | |
236 | ||
237 | reg_value = readl(phy->pmu); | |
238 | ||
239 | if (enable) | |
240 | reg_value |= bits; | |
241 | else | |
242 | reg_value &= ~bits; | |
243 | ||
244 | writel(reg_value, phy->pmu); | |
245 | } | |
246 | ||
247 | static int sun4i_usb_phy_init(struct phy *_phy) | |
248 | { | |
249 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
250 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
251 | int ret; | |
626a630e | 252 | u32 val; |
ba4bdc9e | 253 | |
eadd4312 | 254 | ret = clk_prepare_enable(phy->clk); |
ba4bdc9e HG |
255 | if (ret) |
256 | return ret; | |
257 | ||
258 | ret = reset_control_deassert(phy->reset); | |
259 | if (ret) { | |
eadd4312 | 260 | clk_disable_unprepare(phy->clk); |
ba4bdc9e HG |
261 | return ret; |
262 | } | |
263 | ||
626a630e RH |
264 | if (data->cfg->type == sun8i_h3_phy) { |
265 | if (phy->index == 0) { | |
266 | val = readl(data->base + REG_PHY_UNK_H3); | |
267 | writel(val & ~1, data->base + REG_PHY_UNK_H3); | |
268 | } | |
269 | ||
270 | val = readl(phy->pmu + REG_PMU_UNK_H3); | |
271 | writel(val & ~2, phy->pmu + REG_PMU_UNK_H3); | |
272 | } else { | |
273 | /* Enable USB 45 Ohm resistor calibration */ | |
274 | if (phy->index == 0) | |
275 | sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1); | |
6827a46f | 276 | |
626a630e RH |
277 | /* Adjust PHY's magnitude and rate */ |
278 | sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5); | |
ba4bdc9e | 279 | |
626a630e RH |
280 | /* Disconnect threshold adjustment */ |
281 | sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, | |
282 | data->cfg->disc_thresh, 2); | |
283 | } | |
ba4bdc9e HG |
284 | |
285 | sun4i_usb_phy_passby(phy, 1); | |
286 | ||
d2332303 HG |
287 | if (phy->index == 0) { |
288 | data->phy0_init = true; | |
289 | ||
290 | /* Enable pull-ups */ | |
291 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN); | |
292 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN); | |
293 | ||
b33ecca8 HG |
294 | /* Force ISCR and cable state updates */ |
295 | data->id_det = -1; | |
296 | data->vbus_det = -1; | |
297 | queue_delayed_work(system_wq, &data->detect, 0); | |
d2332303 HG |
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 | ||
b33ecca8 HG |
322 | static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data) |
323 | { | |
324 | switch (data->dr_mode) { | |
325 | case USB_DR_MODE_OTG: | |
326 | return gpiod_get_value_cansleep(data->id_det_gpio); | |
327 | case USB_DR_MODE_HOST: | |
328 | return 0; | |
329 | case USB_DR_MODE_PERIPHERAL: | |
330 | default: | |
331 | return 1; | |
332 | } | |
333 | } | |
334 | ||
3d772c4a HG |
335 | static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data) |
336 | { | |
337 | if (data->vbus_det_gpio) | |
338 | return gpiod_get_value_cansleep(data->vbus_det_gpio); | |
339 | ||
340 | if (data->vbus_power_supply) { | |
341 | union power_supply_propval val; | |
342 | int r; | |
343 | ||
344 | r = power_supply_get_property(data->vbus_power_supply, | |
345 | POWER_SUPPLY_PROP_PRESENT, &val); | |
346 | if (r == 0) | |
347 | return val.intval; | |
348 | } | |
349 | ||
350 | /* Fallback: report vbus as high */ | |
351 | return 1; | |
352 | } | |
353 | ||
354 | static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data) | |
355 | { | |
356 | return data->vbus_det_gpio || data->vbus_power_supply; | |
357 | } | |
358 | ||
91d96f06 HG |
359 | static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data) |
360 | { | |
361 | if ((data->id_det_gpio && data->id_det_irq <= 0) || | |
362 | (data->vbus_det_gpio && data->vbus_det_irq <= 0)) | |
363 | return true; | |
364 | ||
365 | /* | |
366 | * The A31 companion pmic (axp221) does not generate vbus change | |
367 | * interrupts when the board is driving vbus, so we must poll | |
368 | * when using the pmic for vbus-det _and_ we're driving vbus. | |
369 | */ | |
370 | if (data->cfg->type == sun6i_a31_phy && | |
371 | data->vbus_power_supply && data->phys[0].regulator_on) | |
372 | return true; | |
373 | ||
374 | return false; | |
375 | } | |
376 | ||
ba4bdc9e HG |
377 | static int sun4i_usb_phy_power_on(struct phy *_phy) |
378 | { | |
379 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
380 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
381 | int ret; | |
382 | ||
383 | if (!phy->vbus || phy->regulator_on) | |
384 | return 0; | |
385 | ||
386 | /* For phy0 only turn on Vbus if we don't have an ext. Vbus */ | |
8083526e HG |
387 | if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) && |
388 | data->vbus_det) | |
d2332303 | 389 | return 0; |
ba4bdc9e | 390 | |
d2332303 HG |
391 | ret = regulator_enable(phy->vbus); |
392 | if (ret) | |
393 | return ret; | |
ba4bdc9e | 394 | |
d2332303 | 395 | phy->regulator_on = true; |
ba4bdc9e | 396 | |
d2332303 | 397 | /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */ |
91d96f06 | 398 | if (phy->index == 0 && sun4i_usb_phy0_poll(data)) |
d2332303 | 399 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); |
ba4bdc9e | 400 | |
d2332303 | 401 | return 0; |
ba4bdc9e HG |
402 | } |
403 | ||
404 | static int sun4i_usb_phy_power_off(struct phy *_phy) | |
405 | { | |
406 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
407 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
408 | ||
409 | if (!phy->vbus || !phy->regulator_on) | |
410 | return 0; | |
ba4bdc9e | 411 | |
d2332303 HG |
412 | regulator_disable(phy->vbus); |
413 | phy->regulator_on = false; | |
ba4bdc9e | 414 | |
d2332303 HG |
415 | /* |
416 | * phy0 vbus typically slowly discharges, sometimes this causes the | |
417 | * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan. | |
418 | */ | |
91d96f06 | 419 | if (phy->index == 0 && !sun4i_usb_phy0_poll(data)) |
d2332303 | 420 | mod_delayed_work(system_wq, &data->detect, POLL_TIME); |
ba4bdc9e HG |
421 | |
422 | return 0; | |
423 | } | |
424 | ||
24fe86a6 HG |
425 | void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled) |
426 | { | |
427 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
428 | ||
429 | sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2); | |
430 | } | |
7167bf8b | 431 | EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect); |
24fe86a6 | 432 | |
4a9e5ca1 | 433 | static const struct phy_ops sun4i_usb_phy_ops = { |
ba4bdc9e HG |
434 | .init = sun4i_usb_phy_init, |
435 | .exit = sun4i_usb_phy_exit, | |
436 | .power_on = sun4i_usb_phy_power_on, | |
437 | .power_off = sun4i_usb_phy_power_off, | |
438 | .owner = THIS_MODULE, | |
439 | }; | |
440 | ||
d2332303 HG |
441 | static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) |
442 | { | |
443 | struct sun4i_usb_phy_data *data = | |
444 | container_of(work, struct sun4i_usb_phy_data, detect.work); | |
445 | struct phy *phy0 = data->phys[0].phy; | |
1a52abe6 | 446 | int id_det, vbus_det, id_notify = 0, vbus_notify = 0; |
d2332303 | 447 | |
b33ecca8 HG |
448 | if (phy0 == NULL) |
449 | return; | |
450 | ||
451 | id_det = sun4i_usb_phy0_get_id_det(data); | |
8665c18b | 452 | vbus_det = sun4i_usb_phy0_get_vbus_det(data); |
d2332303 HG |
453 | |
454 | mutex_lock(&phy0->mutex); | |
455 | ||
456 | if (!data->phy0_init) { | |
457 | mutex_unlock(&phy0->mutex); | |
458 | return; | |
459 | } | |
460 | ||
461 | if (id_det != data->id_det) { | |
1aedf3a7 HG |
462 | /* |
463 | * When a host cable (id == 0) gets plugged in on systems | |
464 | * without vbus detection report vbus low for long enough for | |
465 | * the musb-ip to end the current device session. | |
466 | */ | |
b33ecca8 HG |
467 | if (data->dr_mode == USB_DR_MODE_OTG && |
468 | !sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) { | |
1aedf3a7 HG |
469 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); |
470 | msleep(200); | |
471 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
472 | } | |
d2332303 HG |
473 | sun4i_usb_phy0_set_id_detect(phy0, id_det); |
474 | data->id_det = id_det; | |
1a52abe6 | 475 | id_notify = 1; |
d2332303 HG |
476 | } |
477 | ||
478 | if (vbus_det != data->vbus_det) { | |
479 | sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det); | |
480 | data->vbus_det = vbus_det; | |
1a52abe6 | 481 | vbus_notify = 1; |
d2332303 HG |
482 | } |
483 | ||
484 | mutex_unlock(&phy0->mutex); | |
485 | ||
1aedf3a7 | 486 | if (id_notify) { |
1a52abe6 HG |
487 | extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST, |
488 | !id_det); | |
1aedf3a7 HG |
489 | /* |
490 | * When a host cable gets unplugged (id == 1) on systems | |
491 | * without vbus detection report vbus low for long enough to | |
492 | * the musb-ip to end the current host session. | |
493 | */ | |
b33ecca8 HG |
494 | if (data->dr_mode == USB_DR_MODE_OTG && |
495 | !sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) { | |
1aedf3a7 HG |
496 | mutex_lock(&phy0->mutex); |
497 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); | |
498 | msleep(1000); | |
499 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
500 | mutex_unlock(&phy0->mutex); | |
501 | } | |
502 | } | |
1a52abe6 HG |
503 | |
504 | if (vbus_notify) | |
505 | extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det); | |
506 | ||
91d96f06 | 507 | if (sun4i_usb_phy0_poll(data)) |
d2332303 HG |
508 | queue_delayed_work(system_wq, &data->detect, POLL_TIME); |
509 | } | |
510 | ||
511 | static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id) | |
512 | { | |
513 | struct sun4i_usb_phy_data *data = dev_id; | |
514 | ||
515 | /* vbus or id changed, let the pins settle and then scan them */ | |
516 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
517 | ||
518 | return IRQ_HANDLED; | |
519 | } | |
520 | ||
8665c18b HG |
521 | static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb, |
522 | unsigned long val, void *v) | |
523 | { | |
524 | struct sun4i_usb_phy_data *data = | |
525 | container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb); | |
526 | struct power_supply *psy = v; | |
527 | ||
528 | /* Properties on the vbus_power_supply changed, scan vbus_det */ | |
529 | if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply) | |
530 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
531 | ||
532 | return NOTIFY_OK; | |
533 | } | |
534 | ||
ba4bdc9e HG |
535 | static struct phy *sun4i_usb_phy_xlate(struct device *dev, |
536 | struct of_phandle_args *args) | |
537 | { | |
538 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
539 | ||
b33ecca8 HG |
540 | if (args->args[0] < data->first_phy || |
541 | args->args[0] >= data->cfg->num_phys) | |
ba4bdc9e HG |
542 | return ERR_PTR(-ENODEV); |
543 | ||
544 | return data->phys[args->args[0]].phy; | |
545 | } | |
546 | ||
d2332303 HG |
547 | static int sun4i_usb_phy_remove(struct platform_device *pdev) |
548 | { | |
549 | struct device *dev = &pdev->dev; | |
550 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
551 | ||
8665c18b HG |
552 | if (data->vbus_power_nb_registered) |
553 | power_supply_unreg_notifier(&data->vbus_power_nb); | |
04e59a02 | 554 | if (data->id_det_irq > 0) |
d2332303 | 555 | devm_free_irq(dev, data->id_det_irq, data); |
04e59a02 | 556 | if (data->vbus_det_irq > 0) |
d2332303 HG |
557 | devm_free_irq(dev, data->vbus_det_irq, data); |
558 | ||
559 | cancel_delayed_work_sync(&data->detect); | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
1a52abe6 HG |
564 | static const unsigned int sun4i_usb_phy0_cable[] = { |
565 | EXTCON_USB, | |
566 | EXTCON_USB_HOST, | |
567 | EXTCON_NONE, | |
568 | }; | |
569 | ||
ba4bdc9e HG |
570 | static int sun4i_usb_phy_probe(struct platform_device *pdev) |
571 | { | |
572 | struct sun4i_usb_phy_data *data; | |
573 | struct device *dev = &pdev->dev; | |
574 | struct device_node *np = dev->of_node; | |
ba4bdc9e | 575 | struct phy_provider *phy_provider; |
ba4bdc9e | 576 | struct resource *res; |
d2332303 | 577 | int i, ret; |
ba4bdc9e HG |
578 | |
579 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
580 | if (!data) | |
581 | return -ENOMEM; | |
582 | ||
72c6187f | 583 | spin_lock_init(&data->reg_lock); |
d2332303 HG |
584 | INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan); |
585 | dev_set_drvdata(dev, data); | |
68dbc2ce HG |
586 | data->cfg = of_device_get_match_data(dev); |
587 | if (!data->cfg) | |
588 | return -EINVAL; | |
fc1f45ed | 589 | |
ba4bdc9e HG |
590 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl"); |
591 | data->base = devm_ioremap_resource(dev, res); | |
592 | if (IS_ERR(data->base)) | |
593 | return PTR_ERR(data->base); | |
594 | ||
b2dfc34c AL |
595 | data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det", |
596 | GPIOD_IN); | |
597 | if (IS_ERR(data->id_det_gpio)) | |
598 | return PTR_ERR(data->id_det_gpio); | |
599 | ||
600 | data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det", | |
601 | GPIOD_IN); | |
602 | if (IS_ERR(data->vbus_det_gpio)) | |
603 | return PTR_ERR(data->vbus_det_gpio); | |
d2332303 | 604 | |
8665c18b HG |
605 | if (of_find_property(np, "usb0_vbus_power-supply", NULL)) { |
606 | data->vbus_power_supply = devm_power_supply_get_by_phandle(dev, | |
607 | "usb0_vbus_power-supply"); | |
608 | if (IS_ERR(data->vbus_power_supply)) | |
609 | return PTR_ERR(data->vbus_power_supply); | |
610 | ||
611 | if (!data->vbus_power_supply) | |
612 | return -EPROBE_DEFER; | |
613 | } | |
614 | ||
b33ecca8 HG |
615 | data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0); |
616 | switch (data->dr_mode) { | |
617 | case USB_DR_MODE_OTG: | |
618 | /* otg without id_det makes no sense, and is not supported */ | |
619 | if (!data->id_det_gpio) { | |
620 | dev_err(dev, "usb0_id_det missing or invalid\n"); | |
621 | return -ENODEV; | |
622 | } | |
623 | /* fall through */ | |
624 | case USB_DR_MODE_HOST: | |
625 | case USB_DR_MODE_PERIPHERAL: | |
1a52abe6 HG |
626 | data->extcon = devm_extcon_dev_allocate(dev, |
627 | sun4i_usb_phy0_cable); | |
628 | if (IS_ERR(data->extcon)) | |
629 | return PTR_ERR(data->extcon); | |
630 | ||
631 | ret = devm_extcon_dev_register(dev, data->extcon); | |
632 | if (ret) { | |
633 | dev_err(dev, "failed to register extcon: %d\n", ret); | |
634 | return ret; | |
635 | } | |
b33ecca8 HG |
636 | break; |
637 | default: | |
638 | dev_info(dev, "dr_mode unknown, not registering usb phy0\n"); | |
639 | data->first_phy = 1; | |
1a52abe6 HG |
640 | } |
641 | ||
b33ecca8 | 642 | for (i = data->first_phy; i < data->cfg->num_phys; i++) { |
2a7f9982 MR |
643 | struct sun4i_usb_phy *phy = data->phys + i; |
644 | char name[16]; | |
645 | ||
ba4bdc9e | 646 | snprintf(name, sizeof(name), "usb%d_vbus", i); |
2a7f9982 MR |
647 | phy->vbus = devm_regulator_get_optional(dev, name); |
648 | if (IS_ERR(phy->vbus)) { | |
649 | if (PTR_ERR(phy->vbus) == -EPROBE_DEFER) | |
ba4bdc9e | 650 | return -EPROBE_DEFER; |
2a7f9982 | 651 | phy->vbus = NULL; |
ba4bdc9e HG |
652 | } |
653 | ||
68dbc2ce | 654 | if (data->cfg->dedicated_clocks) |
eadd4312 MR |
655 | snprintf(name, sizeof(name), "usb%d_phy", i); |
656 | else | |
657 | strlcpy(name, "usb_phy", sizeof(name)); | |
658 | ||
659 | phy->clk = devm_clk_get(dev, name); | |
660 | if (IS_ERR(phy->clk)) { | |
661 | dev_err(dev, "failed to get clock %s\n", name); | |
662 | return PTR_ERR(phy->clk); | |
663 | } | |
664 | ||
ba4bdc9e | 665 | snprintf(name, sizeof(name), "usb%d_reset", i); |
2a7f9982 MR |
666 | phy->reset = devm_reset_control_get(dev, name); |
667 | if (IS_ERR(phy->reset)) { | |
ba4bdc9e | 668 | dev_err(dev, "failed to get reset %s\n", name); |
2a7f9982 | 669 | return PTR_ERR(phy->reset); |
ba4bdc9e HG |
670 | } |
671 | ||
672 | if (i) { /* No pmu for usbc0 */ | |
673 | snprintf(name, sizeof(name), "pmu%d", i); | |
674 | res = platform_get_resource_byname(pdev, | |
675 | IORESOURCE_MEM, name); | |
2a7f9982 MR |
676 | phy->pmu = devm_ioremap_resource(dev, res); |
677 | if (IS_ERR(phy->pmu)) | |
678 | return PTR_ERR(phy->pmu); | |
ba4bdc9e HG |
679 | } |
680 | ||
dbc98635 | 681 | phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops); |
2a7f9982 | 682 | if (IS_ERR(phy->phy)) { |
ba4bdc9e | 683 | dev_err(dev, "failed to create PHY %d\n", i); |
2a7f9982 | 684 | return PTR_ERR(phy->phy); |
ba4bdc9e HG |
685 | } |
686 | ||
2a7f9982 MR |
687 | phy->index = i; |
688 | phy_set_drvdata(phy->phy, &data->phys[i]); | |
ba4bdc9e HG |
689 | } |
690 | ||
d2332303 | 691 | data->id_det_irq = gpiod_to_irq(data->id_det_gpio); |
5cf700ac | 692 | if (data->id_det_irq > 0) { |
d2332303 HG |
693 | ret = devm_request_irq(dev, data->id_det_irq, |
694 | sun4i_usb_phy0_id_vbus_det_irq, | |
695 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
696 | "usb0-id-det", data); | |
697 | if (ret) { | |
698 | dev_err(dev, "Err requesting id-det-irq: %d\n", ret); | |
699 | return ret; | |
700 | } | |
701 | } | |
702 | ||
91d96f06 | 703 | data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio); |
5cf700ac | 704 | if (data->vbus_det_irq > 0) { |
d2332303 HG |
705 | ret = devm_request_irq(dev, data->vbus_det_irq, |
706 | sun4i_usb_phy0_id_vbus_det_irq, | |
707 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
708 | "usb0-vbus-det", data); | |
709 | if (ret) { | |
710 | dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret); | |
711 | data->vbus_det_irq = -1; | |
712 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
713 | return ret; | |
714 | } | |
715 | } | |
716 | ||
8665c18b HG |
717 | if (data->vbus_power_supply) { |
718 | data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify; | |
719 | data->vbus_power_nb.priority = 0; | |
720 | ret = power_supply_reg_notifier(&data->vbus_power_nb); | |
721 | if (ret) { | |
722 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
723 | return ret; | |
724 | } | |
725 | data->vbus_power_nb_registered = true; | |
726 | } | |
727 | ||
ba4bdc9e | 728 | phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate); |
d2332303 HG |
729 | if (IS_ERR(phy_provider)) { |
730 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
731 | return PTR_ERR(phy_provider); | |
732 | } | |
ba4bdc9e | 733 | |
d2332303 | 734 | return 0; |
ba4bdc9e HG |
735 | } |
736 | ||
68dbc2ce HG |
737 | static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = { |
738 | .num_phys = 3, | |
739 | .type = sun4i_a10_phy, | |
740 | .disc_thresh = 3, | |
741 | .phyctl_offset = REG_PHYCTL_A10, | |
742 | .dedicated_clocks = false, | |
743 | }; | |
744 | ||
745 | static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = { | |
746 | .num_phys = 2, | |
747 | .type = sun4i_a10_phy, | |
748 | .disc_thresh = 2, | |
749 | .phyctl_offset = REG_PHYCTL_A10, | |
750 | .dedicated_clocks = false, | |
751 | }; | |
752 | ||
753 | static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = { | |
754 | .num_phys = 3, | |
91d96f06 | 755 | .type = sun6i_a31_phy, |
68dbc2ce HG |
756 | .disc_thresh = 3, |
757 | .phyctl_offset = REG_PHYCTL_A10, | |
758 | .dedicated_clocks = true, | |
759 | }; | |
760 | ||
761 | static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = { | |
762 | .num_phys = 3, | |
763 | .type = sun4i_a10_phy, | |
764 | .disc_thresh = 2, | |
765 | .phyctl_offset = REG_PHYCTL_A10, | |
766 | .dedicated_clocks = false, | |
767 | }; | |
768 | ||
769 | static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = { | |
770 | .num_phys = 2, | |
771 | .type = sun4i_a10_phy, | |
772 | .disc_thresh = 3, | |
773 | .phyctl_offset = REG_PHYCTL_A10, | |
774 | .dedicated_clocks = true, | |
775 | }; | |
776 | ||
777 | static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = { | |
778 | .num_phys = 2, | |
779 | .type = sun8i_a33_phy, | |
780 | .disc_thresh = 3, | |
781 | .phyctl_offset = REG_PHYCTL_A33, | |
782 | .dedicated_clocks = true, | |
783 | }; | |
784 | ||
626a630e RH |
785 | static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = { |
786 | .num_phys = 4, | |
787 | .type = sun8i_h3_phy, | |
788 | .disc_thresh = 3, | |
789 | .dedicated_clocks = true, | |
790 | }; | |
791 | ||
ba4bdc9e | 792 | static const struct of_device_id sun4i_usb_phy_of_match[] = { |
68dbc2ce HG |
793 | { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg }, |
794 | { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg }, | |
795 | { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg }, | |
796 | { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg }, | |
797 | { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg }, | |
798 | { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg }, | |
626a630e | 799 | { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg }, |
ba4bdc9e HG |
800 | { }, |
801 | }; | |
802 | MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match); | |
803 | ||
804 | static struct platform_driver sun4i_usb_phy_driver = { | |
805 | .probe = sun4i_usb_phy_probe, | |
d2332303 | 806 | .remove = sun4i_usb_phy_remove, |
ba4bdc9e HG |
807 | .driver = { |
808 | .of_match_table = sun4i_usb_phy_of_match, | |
809 | .name = "sun4i-usb-phy", | |
ba4bdc9e HG |
810 | } |
811 | }; | |
812 | module_platform_driver(sun4i_usb_phy_driver); | |
813 | ||
814 | MODULE_DESCRIPTION("Allwinner sun4i USB phy driver"); | |
815 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); | |
816 | MODULE_LICENSE("GPL v2"); |