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> | |
919ab252 | 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 |
3ecc25e1 | 52 | #define REG_PHY_OTGCTL 0x20 |
626a630e | 53 | |
b3e0d141 | 54 | #define REG_PMU_UNK1 0x10 |
ba4bdc9e HG |
55 | |
56 | #define PHYCTL_DATA BIT(7) | |
57 | ||
3ecc25e1 IZ |
58 | #define OTGCTL_ROUTE_MUSB BIT(0) |
59 | ||
ba4bdc9e HG |
60 | #define SUNXI_AHB_ICHR8_EN BIT(10) |
61 | #define SUNXI_AHB_INCR4_BURST_EN BIT(9) | |
62 | #define SUNXI_AHB_INCRX_ALIGN_EN BIT(8) | |
63 | #define SUNXI_ULPI_BYPASS_EN BIT(0) | |
64 | ||
d2332303 HG |
65 | /* ISCR, Interface Status and Control bits */ |
66 | #define ISCR_ID_PULLUP_EN (1 << 17) | |
67 | #define ISCR_DPDM_PULLUP_EN (1 << 16) | |
68 | /* sunxi has the phy id/vbus pins not connected, so we use the force bits */ | |
69 | #define ISCR_FORCE_ID_MASK (3 << 14) | |
70 | #define ISCR_FORCE_ID_LOW (2 << 14) | |
71 | #define ISCR_FORCE_ID_HIGH (3 << 14) | |
72 | #define ISCR_FORCE_VBUS_MASK (3 << 12) | |
73 | #define ISCR_FORCE_VBUS_LOW (2 << 12) | |
74 | #define ISCR_FORCE_VBUS_HIGH (3 << 12) | |
75 | ||
ba4bdc9e HG |
76 | /* Common Control Bits for Both PHYs */ |
77 | #define PHY_PLL_BW 0x03 | |
78 | #define PHY_RES45_CAL_EN 0x0c | |
79 | ||
80 | /* Private Control Bits for Each PHY */ | |
81 | #define PHY_TX_AMPLITUDE_TUNE 0x20 | |
82 | #define PHY_TX_SLEWRATE_TUNE 0x22 | |
83 | #define PHY_VBUSVALID_TH_SEL 0x25 | |
84 | #define PHY_PULLUP_RES_SEL 0x27 | |
85 | #define PHY_OTG_FUNC_EN 0x28 | |
86 | #define PHY_VBUS_DET_EN 0x29 | |
87 | #define PHY_DISCON_TH_SEL 0x2a | |
24fe86a6 | 88 | #define PHY_SQUELCH_DETECT 0x3c |
ba4bdc9e | 89 | |
626a630e | 90 | #define MAX_PHYS 4 |
ba4bdc9e | 91 | |
d2332303 HG |
92 | /* |
93 | * Note do not raise the debounce time, we must report Vusb high within 100ms | |
94 | * otherwise we get Vbus errors | |
95 | */ | |
96 | #define DEBOUNCE_TIME msecs_to_jiffies(50) | |
97 | #define POLL_TIME msecs_to_jiffies(250) | |
98 | ||
68dbc2ce HG |
99 | enum sun4i_usb_phy_type { |
100 | sun4i_a10_phy, | |
91d96f06 | 101 | sun6i_a31_phy, |
68dbc2ce | 102 | sun8i_a33_phy, |
626a630e | 103 | sun8i_h3_phy, |
16c40361 | 104 | sun8i_v3s_phy, |
b3e0d141 | 105 | sun50i_a64_phy, |
68dbc2ce HG |
106 | }; |
107 | ||
108 | struct sun4i_usb_phy_cfg { | |
109 | int num_phys; | |
110 | enum sun4i_usb_phy_type type; | |
111 | u32 disc_thresh; | |
112 | u8 phyctl_offset; | |
113 | bool dedicated_clocks; | |
b3e0d141 | 114 | bool enable_pmu_unk1; |
3ecc25e1 | 115 | bool phy0_dual_route; |
68dbc2ce HG |
116 | }; |
117 | ||
ba4bdc9e | 118 | struct sun4i_usb_phy_data { |
ba4bdc9e | 119 | void __iomem *base; |
68dbc2ce | 120 | const struct sun4i_usb_phy_cfg *cfg; |
b33ecca8 | 121 | enum usb_dr_mode dr_mode; |
919ab252 | 122 | spinlock_t reg_lock; /* guard access to phyctl reg */ |
ba4bdc9e HG |
123 | struct sun4i_usb_phy { |
124 | struct phy *phy; | |
125 | void __iomem *pmu; | |
126 | struct regulator *vbus; | |
127 | struct reset_control *reset; | |
eadd4312 | 128 | struct clk *clk; |
d2332303 | 129 | bool regulator_on; |
ba4bdc9e HG |
130 | int index; |
131 | } phys[MAX_PHYS]; | |
d2332303 | 132 | /* phy0 / otg related variables */ |
1a52abe6 | 133 | struct extcon_dev *extcon; |
d2332303 | 134 | bool phy0_init; |
d2332303 HG |
135 | struct gpio_desc *id_det_gpio; |
136 | struct gpio_desc *vbus_det_gpio; | |
8665c18b HG |
137 | struct power_supply *vbus_power_supply; |
138 | struct notifier_block vbus_power_nb; | |
139 | bool vbus_power_nb_registered; | |
36f9159b | 140 | bool force_session_end; |
d2332303 HG |
141 | int id_det_irq; |
142 | int vbus_det_irq; | |
143 | int id_det; | |
144 | int vbus_det; | |
145 | struct delayed_work detect; | |
ba4bdc9e HG |
146 | }; |
147 | ||
148 | #define to_sun4i_usb_phy_data(phy) \ | |
149 | container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index]) | |
150 | ||
d2332303 HG |
151 | static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set) |
152 | { | |
153 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
154 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
155 | u32 iscr; | |
156 | ||
157 | iscr = readl(data->base + REG_ISCR); | |
158 | iscr &= ~clr; | |
159 | iscr |= set; | |
160 | writel(iscr, data->base + REG_ISCR); | |
161 | } | |
162 | ||
163 | static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val) | |
164 | { | |
165 | if (val) | |
166 | val = ISCR_FORCE_ID_HIGH; | |
167 | else | |
168 | val = ISCR_FORCE_ID_LOW; | |
169 | ||
170 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val); | |
171 | } | |
172 | ||
173 | static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val) | |
174 | { | |
175 | if (val) | |
176 | val = ISCR_FORCE_VBUS_HIGH; | |
177 | else | |
178 | val = ISCR_FORCE_VBUS_LOW; | |
179 | ||
180 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val); | |
181 | } | |
182 | ||
ba4bdc9e HG |
183 | static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data, |
184 | int len) | |
185 | { | |
186 | struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy); | |
187 | u32 temp, usbc_bit = BIT(phy->index * 2); | |
d99cb378 | 188 | void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset; |
919ab252 | 189 | unsigned long flags; |
ba4bdc9e HG |
190 | int i; |
191 | ||
919ab252 | 192 | spin_lock_irqsave(&phy_data->reg_lock, flags); |
ba4bdc9e | 193 | |
d699c1d0 IZ |
194 | if (phy_data->cfg->phyctl_offset == REG_PHYCTL_A33) { |
195 | /* SoCs newer than A33 need us to set phyctl to 0 explicitly */ | |
fc1f45ed | 196 | writel(0, phyctl); |
fc1f45ed HG |
197 | } |
198 | ||
ba4bdc9e | 199 | for (i = 0; i < len; i++) { |
fc1f45ed | 200 | temp = readl(phyctl); |
ba4bdc9e HG |
201 | |
202 | /* clear the address portion */ | |
203 | temp &= ~(0xff << 8); | |
204 | ||
205 | /* set the address */ | |
206 | temp |= ((addr + i) << 8); | |
fc1f45ed | 207 | writel(temp, phyctl); |
ba4bdc9e HG |
208 | |
209 | /* set the data bit and clear usbc bit*/ | |
fc1f45ed | 210 | temp = readb(phyctl); |
ba4bdc9e HG |
211 | if (data & 0x1) |
212 | temp |= PHYCTL_DATA; | |
213 | else | |
214 | temp &= ~PHYCTL_DATA; | |
215 | temp &= ~usbc_bit; | |
fc1f45ed | 216 | writeb(temp, phyctl); |
ba4bdc9e HG |
217 | |
218 | /* pulse usbc_bit */ | |
fc1f45ed | 219 | temp = readb(phyctl); |
ba4bdc9e | 220 | temp |= usbc_bit; |
fc1f45ed | 221 | writeb(temp, phyctl); |
ba4bdc9e | 222 | |
fc1f45ed | 223 | temp = readb(phyctl); |
ba4bdc9e | 224 | temp &= ~usbc_bit; |
fc1f45ed | 225 | writeb(temp, phyctl); |
ba4bdc9e HG |
226 | |
227 | data >>= 1; | |
228 | } | |
919ab252 CYT |
229 | |
230 | spin_unlock_irqrestore(&phy_data->reg_lock, flags); | |
ba4bdc9e HG |
231 | } |
232 | ||
233 | static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable) | |
234 | { | |
235 | u32 bits, reg_value; | |
236 | ||
237 | if (!phy->pmu) | |
238 | return; | |
239 | ||
240 | bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN | | |
241 | SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN; | |
242 | ||
243 | reg_value = readl(phy->pmu); | |
244 | ||
245 | if (enable) | |
246 | reg_value |= bits; | |
247 | else | |
248 | reg_value &= ~bits; | |
249 | ||
250 | writel(reg_value, phy->pmu); | |
251 | } | |
252 | ||
253 | static int sun4i_usb_phy_init(struct phy *_phy) | |
254 | { | |
255 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
256 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
257 | int ret; | |
626a630e | 258 | u32 val; |
ba4bdc9e | 259 | |
eadd4312 | 260 | ret = clk_prepare_enable(phy->clk); |
ba4bdc9e HG |
261 | if (ret) |
262 | return ret; | |
263 | ||
264 | ret = reset_control_deassert(phy->reset); | |
265 | if (ret) { | |
eadd4312 | 266 | clk_disable_unprepare(phy->clk); |
ba4bdc9e HG |
267 | return ret; |
268 | } | |
269 | ||
4320f9d4 | 270 | if (phy->pmu && data->cfg->enable_pmu_unk1) { |
b3e0d141 IZ |
271 | val = readl(phy->pmu + REG_PMU_UNK1); |
272 | writel(val & ~2, phy->pmu + REG_PMU_UNK1); | |
273 | } | |
274 | ||
3ecc25e1 IZ |
275 | /* Enable USB 45 Ohm resistor calibration */ |
276 | if (phy->index == 0) | |
277 | sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1); | |
6827a46f | 278 | |
3ecc25e1 IZ |
279 | /* Adjust PHY's magnitude and rate */ |
280 | sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5); | |
ba4bdc9e | 281 | |
3ecc25e1 IZ |
282 | /* Disconnect threshold adjustment */ |
283 | sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, | |
284 | data->cfg->disc_thresh, 2); | |
ba4bdc9e HG |
285 | |
286 | sun4i_usb_phy_passby(phy, 1); | |
287 | ||
d2332303 HG |
288 | if (phy->index == 0) { |
289 | data->phy0_init = true; | |
290 | ||
291 | /* Enable pull-ups */ | |
292 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN); | |
293 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN); | |
294 | ||
b33ecca8 HG |
295 | /* Force ISCR and cable state updates */ |
296 | data->id_det = -1; | |
297 | data->vbus_det = -1; | |
298 | queue_delayed_work(system_wq, &data->detect, 0); | |
d2332303 HG |
299 | } |
300 | ||
ba4bdc9e HG |
301 | return 0; |
302 | } | |
303 | ||
304 | static int sun4i_usb_phy_exit(struct phy *_phy) | |
305 | { | |
306 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
307 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
308 | ||
309 | if (phy->index == 0) { | |
310 | /* Disable pull-ups */ | |
311 | sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0); | |
312 | sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0); | |
313 | data->phy0_init = false; | |
314 | } | |
ba4bdc9e HG |
315 | |
316 | sun4i_usb_phy_passby(phy, 0); | |
317 | reset_control_assert(phy->reset); | |
eadd4312 | 318 | clk_disable_unprepare(phy->clk); |
ba4bdc9e HG |
319 | |
320 | return 0; | |
321 | } | |
322 | ||
b33ecca8 HG |
323 | static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data) |
324 | { | |
325 | switch (data->dr_mode) { | |
326 | case USB_DR_MODE_OTG: | |
5f90d31c HG |
327 | if (data->id_det_gpio) |
328 | return gpiod_get_value_cansleep(data->id_det_gpio); | |
329 | else | |
330 | return 1; /* Fallback to peripheral mode */ | |
b33ecca8 HG |
331 | case USB_DR_MODE_HOST: |
332 | return 0; | |
333 | case USB_DR_MODE_PERIPHERAL: | |
334 | default: | |
335 | return 1; | |
336 | } | |
337 | } | |
338 | ||
3d772c4a HG |
339 | static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data) |
340 | { | |
341 | if (data->vbus_det_gpio) | |
342 | return gpiod_get_value_cansleep(data->vbus_det_gpio); | |
343 | ||
344 | if (data->vbus_power_supply) { | |
345 | union power_supply_propval val; | |
346 | int r; | |
347 | ||
348 | r = power_supply_get_property(data->vbus_power_supply, | |
349 | POWER_SUPPLY_PROP_PRESENT, &val); | |
350 | if (r == 0) | |
351 | return val.intval; | |
352 | } | |
353 | ||
354 | /* Fallback: report vbus as high */ | |
355 | return 1; | |
356 | } | |
357 | ||
358 | static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data) | |
359 | { | |
360 | return data->vbus_det_gpio || data->vbus_power_supply; | |
361 | } | |
362 | ||
91d96f06 HG |
363 | static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data) |
364 | { | |
365 | if ((data->id_det_gpio && data->id_det_irq <= 0) || | |
366 | (data->vbus_det_gpio && data->vbus_det_irq <= 0)) | |
367 | return true; | |
368 | ||
369 | /* | |
370 | * The A31 companion pmic (axp221) does not generate vbus change | |
371 | * interrupts when the board is driving vbus, so we must poll | |
372 | * when using the pmic for vbus-det _and_ we're driving vbus. | |
373 | */ | |
374 | if (data->cfg->type == sun6i_a31_phy && | |
375 | data->vbus_power_supply && data->phys[0].regulator_on) | |
376 | return true; | |
377 | ||
378 | return false; | |
379 | } | |
380 | ||
ba4bdc9e HG |
381 | static int sun4i_usb_phy_power_on(struct phy *_phy) |
382 | { | |
383 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
384 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
385 | int ret; | |
386 | ||
387 | if (!phy->vbus || phy->regulator_on) | |
388 | return 0; | |
389 | ||
390 | /* For phy0 only turn on Vbus if we don't have an ext. Vbus */ | |
8083526e | 391 | if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) && |
91d6e3b6 HG |
392 | data->vbus_det) { |
393 | dev_warn(&_phy->dev, "External vbus detected, not enabling our own vbus\n"); | |
d2332303 | 394 | return 0; |
91d6e3b6 | 395 | } |
ba4bdc9e | 396 | |
d2332303 HG |
397 | ret = regulator_enable(phy->vbus); |
398 | if (ret) | |
399 | return ret; | |
ba4bdc9e | 400 | |
d2332303 | 401 | phy->regulator_on = true; |
ba4bdc9e | 402 | |
d2332303 | 403 | /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */ |
91d96f06 | 404 | if (phy->index == 0 && sun4i_usb_phy0_poll(data)) |
d2332303 | 405 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); |
ba4bdc9e | 406 | |
d2332303 | 407 | return 0; |
ba4bdc9e HG |
408 | } |
409 | ||
410 | static int sun4i_usb_phy_power_off(struct phy *_phy) | |
411 | { | |
412 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
413 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
414 | ||
415 | if (!phy->vbus || !phy->regulator_on) | |
416 | return 0; | |
ba4bdc9e | 417 | |
d2332303 HG |
418 | regulator_disable(phy->vbus); |
419 | phy->regulator_on = false; | |
ba4bdc9e | 420 | |
d2332303 HG |
421 | /* |
422 | * phy0 vbus typically slowly discharges, sometimes this causes the | |
423 | * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan. | |
424 | */ | |
91d96f06 | 425 | if (phy->index == 0 && !sun4i_usb_phy0_poll(data)) |
d2332303 | 426 | mod_delayed_work(system_wq, &data->detect, POLL_TIME); |
ba4bdc9e HG |
427 | |
428 | return 0; | |
429 | } | |
430 | ||
6ba43c29 HG |
431 | static int sun4i_usb_phy_set_mode(struct phy *_phy, enum phy_mode mode) |
432 | { | |
433 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
434 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
5d04c883 | 435 | int new_mode; |
6ba43c29 HG |
436 | |
437 | if (phy->index != 0) | |
438 | return -EINVAL; | |
439 | ||
440 | switch (mode) { | |
441 | case PHY_MODE_USB_HOST: | |
5d04c883 | 442 | new_mode = USB_DR_MODE_HOST; |
6ba43c29 HG |
443 | break; |
444 | case PHY_MODE_USB_DEVICE: | |
5d04c883 | 445 | new_mode = USB_DR_MODE_PERIPHERAL; |
6ba43c29 HG |
446 | break; |
447 | case PHY_MODE_USB_OTG: | |
5d04c883 | 448 | new_mode = USB_DR_MODE_OTG; |
6ba43c29 HG |
449 | break; |
450 | default: | |
451 | return -EINVAL; | |
452 | } | |
453 | ||
5d04c883 HG |
454 | if (new_mode != data->dr_mode) { |
455 | dev_info(&_phy->dev, "Changing dr_mode to %d\n", new_mode); | |
456 | data->dr_mode = new_mode; | |
457 | } | |
458 | ||
459 | data->id_det = -1; /* Force reprocessing of id */ | |
6ba43c29 HG |
460 | data->force_session_end = true; |
461 | queue_delayed_work(system_wq, &data->detect, 0); | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
24fe86a6 HG |
466 | void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled) |
467 | { | |
468 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
469 | ||
470 | sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2); | |
471 | } | |
7167bf8b | 472 | EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect); |
24fe86a6 | 473 | |
4a9e5ca1 | 474 | static const struct phy_ops sun4i_usb_phy_ops = { |
ba4bdc9e HG |
475 | .init = sun4i_usb_phy_init, |
476 | .exit = sun4i_usb_phy_exit, | |
477 | .power_on = sun4i_usb_phy_power_on, | |
478 | .power_off = sun4i_usb_phy_power_off, | |
6ba43c29 | 479 | .set_mode = sun4i_usb_phy_set_mode, |
ba4bdc9e HG |
480 | .owner = THIS_MODULE, |
481 | }; | |
482 | ||
3ecc25e1 IZ |
483 | static void sun4i_usb_phy0_reroute(struct sun4i_usb_phy_data *data, int id_det) |
484 | { | |
485 | u32 regval; | |
486 | ||
487 | regval = readl(data->base + REG_PHY_OTGCTL); | |
488 | if (id_det == 0) { | |
489 | /* Host mode. Route phy0 to EHCI/OHCI */ | |
490 | regval &= ~OTGCTL_ROUTE_MUSB; | |
491 | } else { | |
492 | /* Peripheral mode. Route phy0 to MUSB */ | |
493 | regval |= OTGCTL_ROUTE_MUSB; | |
494 | } | |
495 | writel(regval, data->base + REG_PHY_OTGCTL); | |
496 | } | |
497 | ||
d2332303 HG |
498 | static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) |
499 | { | |
500 | struct sun4i_usb_phy_data *data = | |
501 | container_of(work, struct sun4i_usb_phy_data, detect.work); | |
502 | struct phy *phy0 = data->phys[0].phy; | |
36f9159b | 503 | bool force_session_end, id_notify = false, vbus_notify = false; |
9745ceeb | 504 | int id_det, vbus_det; |
d2332303 | 505 | |
b33ecca8 HG |
506 | if (phy0 == NULL) |
507 | return; | |
508 | ||
509 | id_det = sun4i_usb_phy0_get_id_det(data); | |
8665c18b | 510 | vbus_det = sun4i_usb_phy0_get_vbus_det(data); |
d2332303 HG |
511 | |
512 | mutex_lock(&phy0->mutex); | |
513 | ||
514 | if (!data->phy0_init) { | |
515 | mutex_unlock(&phy0->mutex); | |
516 | return; | |
517 | } | |
518 | ||
36f9159b HG |
519 | force_session_end = data->force_session_end; |
520 | data->force_session_end = false; | |
521 | ||
d2332303 | 522 | if (id_det != data->id_det) { |
36f9159b | 523 | /* id-change, force session end if we've no vbus detection */ |
b33ecca8 | 524 | if (data->dr_mode == USB_DR_MODE_OTG && |
36f9159b HG |
525 | !sun4i_usb_phy0_have_vbus_det(data)) |
526 | force_session_end = true; | |
527 | ||
528 | /* When entering host mode (id = 0) force end the session now */ | |
529 | if (force_session_end && id_det == 0) { | |
1aedf3a7 HG |
530 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); |
531 | msleep(200); | |
532 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
533 | } | |
d2332303 HG |
534 | sun4i_usb_phy0_set_id_detect(phy0, id_det); |
535 | data->id_det = id_det; | |
9745ceeb | 536 | id_notify = true; |
d2332303 HG |
537 | } |
538 | ||
539 | if (vbus_det != data->vbus_det) { | |
540 | sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det); | |
541 | data->vbus_det = vbus_det; | |
9745ceeb | 542 | vbus_notify = true; |
d2332303 HG |
543 | } |
544 | ||
545 | mutex_unlock(&phy0->mutex); | |
546 | ||
1aedf3a7 | 547 | if (id_notify) { |
66adb889 | 548 | extcon_set_state_sync(data->extcon, EXTCON_USB_HOST, |
1a52abe6 | 549 | !id_det); |
36f9159b HG |
550 | /* When leaving host mode force end the session here */ |
551 | if (force_session_end && id_det == 1) { | |
1aedf3a7 HG |
552 | mutex_lock(&phy0->mutex); |
553 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); | |
554 | msleep(1000); | |
555 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
556 | mutex_unlock(&phy0->mutex); | |
557 | } | |
3ecc25e1 IZ |
558 | |
559 | /* Re-route PHY0 if necessary */ | |
560 | if (data->cfg->phy0_dual_route) | |
561 | sun4i_usb_phy0_reroute(data, id_det); | |
1aedf3a7 | 562 | } |
1a52abe6 HG |
563 | |
564 | if (vbus_notify) | |
66adb889 | 565 | extcon_set_state_sync(data->extcon, EXTCON_USB, vbus_det); |
1a52abe6 | 566 | |
91d96f06 | 567 | if (sun4i_usb_phy0_poll(data)) |
d2332303 HG |
568 | queue_delayed_work(system_wq, &data->detect, POLL_TIME); |
569 | } | |
570 | ||
571 | static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id) | |
572 | { | |
573 | struct sun4i_usb_phy_data *data = dev_id; | |
574 | ||
575 | /* vbus or id changed, let the pins settle and then scan them */ | |
576 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
577 | ||
578 | return IRQ_HANDLED; | |
579 | } | |
580 | ||
8665c18b HG |
581 | static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb, |
582 | unsigned long val, void *v) | |
583 | { | |
584 | struct sun4i_usb_phy_data *data = | |
585 | container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb); | |
586 | struct power_supply *psy = v; | |
587 | ||
588 | /* Properties on the vbus_power_supply changed, scan vbus_det */ | |
589 | if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply) | |
590 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
591 | ||
592 | return NOTIFY_OK; | |
593 | } | |
594 | ||
ba4bdc9e HG |
595 | static struct phy *sun4i_usb_phy_xlate(struct device *dev, |
596 | struct of_phandle_args *args) | |
597 | { | |
598 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
599 | ||
5f90d31c | 600 | if (args->args[0] >= data->cfg->num_phys) |
ba4bdc9e HG |
601 | return ERR_PTR(-ENODEV); |
602 | ||
603 | return data->phys[args->args[0]].phy; | |
604 | } | |
605 | ||
d2332303 HG |
606 | static int sun4i_usb_phy_remove(struct platform_device *pdev) |
607 | { | |
608 | struct device *dev = &pdev->dev; | |
609 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
610 | ||
8665c18b HG |
611 | if (data->vbus_power_nb_registered) |
612 | power_supply_unreg_notifier(&data->vbus_power_nb); | |
04e59a02 | 613 | if (data->id_det_irq > 0) |
d2332303 | 614 | devm_free_irq(dev, data->id_det_irq, data); |
04e59a02 | 615 | if (data->vbus_det_irq > 0) |
d2332303 HG |
616 | devm_free_irq(dev, data->vbus_det_irq, data); |
617 | ||
618 | cancel_delayed_work_sync(&data->detect); | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
1a52abe6 HG |
623 | static const unsigned int sun4i_usb_phy0_cable[] = { |
624 | EXTCON_USB, | |
625 | EXTCON_USB_HOST, | |
626 | EXTCON_NONE, | |
627 | }; | |
628 | ||
ba4bdc9e HG |
629 | static int sun4i_usb_phy_probe(struct platform_device *pdev) |
630 | { | |
631 | struct sun4i_usb_phy_data *data; | |
632 | struct device *dev = &pdev->dev; | |
633 | struct device_node *np = dev->of_node; | |
ba4bdc9e | 634 | struct phy_provider *phy_provider; |
ba4bdc9e | 635 | struct resource *res; |
d2332303 | 636 | int i, ret; |
ba4bdc9e HG |
637 | |
638 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
639 | if (!data) | |
640 | return -ENOMEM; | |
641 | ||
919ab252 | 642 | spin_lock_init(&data->reg_lock); |
d2332303 HG |
643 | INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan); |
644 | dev_set_drvdata(dev, data); | |
68dbc2ce HG |
645 | data->cfg = of_device_get_match_data(dev); |
646 | if (!data->cfg) | |
647 | return -EINVAL; | |
fc1f45ed | 648 | |
ba4bdc9e HG |
649 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl"); |
650 | data->base = devm_ioremap_resource(dev, res); | |
651 | if (IS_ERR(data->base)) | |
652 | return PTR_ERR(data->base); | |
653 | ||
b2dfc34c AL |
654 | data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det", |
655 | GPIOD_IN); | |
656 | if (IS_ERR(data->id_det_gpio)) | |
657 | return PTR_ERR(data->id_det_gpio); | |
658 | ||
659 | data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det", | |
660 | GPIOD_IN); | |
661 | if (IS_ERR(data->vbus_det_gpio)) | |
662 | return PTR_ERR(data->vbus_det_gpio); | |
d2332303 | 663 | |
8665c18b HG |
664 | if (of_find_property(np, "usb0_vbus_power-supply", NULL)) { |
665 | data->vbus_power_supply = devm_power_supply_get_by_phandle(dev, | |
666 | "usb0_vbus_power-supply"); | |
667 | if (IS_ERR(data->vbus_power_supply)) | |
668 | return PTR_ERR(data->vbus_power_supply); | |
669 | ||
670 | if (!data->vbus_power_supply) | |
671 | return -EPROBE_DEFER; | |
672 | } | |
673 | ||
b33ecca8 | 674 | data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0); |
5f90d31c HG |
675 | |
676 | data->extcon = devm_extcon_dev_allocate(dev, sun4i_usb_phy0_cable); | |
677 | if (IS_ERR(data->extcon)) | |
678 | return PTR_ERR(data->extcon); | |
679 | ||
680 | ret = devm_extcon_dev_register(dev, data->extcon); | |
681 | if (ret) { | |
682 | dev_err(dev, "failed to register extcon: %d\n", ret); | |
683 | return ret; | |
1a52abe6 HG |
684 | } |
685 | ||
5f90d31c | 686 | for (i = 0; i < data->cfg->num_phys; i++) { |
2a7f9982 MR |
687 | struct sun4i_usb_phy *phy = data->phys + i; |
688 | char name[16]; | |
689 | ||
ba4bdc9e | 690 | snprintf(name, sizeof(name), "usb%d_vbus", i); |
2a7f9982 MR |
691 | phy->vbus = devm_regulator_get_optional(dev, name); |
692 | if (IS_ERR(phy->vbus)) { | |
693 | if (PTR_ERR(phy->vbus) == -EPROBE_DEFER) | |
ba4bdc9e | 694 | return -EPROBE_DEFER; |
2a7f9982 | 695 | phy->vbus = NULL; |
ba4bdc9e HG |
696 | } |
697 | ||
68dbc2ce | 698 | if (data->cfg->dedicated_clocks) |
eadd4312 MR |
699 | snprintf(name, sizeof(name), "usb%d_phy", i); |
700 | else | |
701 | strlcpy(name, "usb_phy", sizeof(name)); | |
702 | ||
703 | phy->clk = devm_clk_get(dev, name); | |
704 | if (IS_ERR(phy->clk)) { | |
705 | dev_err(dev, "failed to get clock %s\n", name); | |
706 | return PTR_ERR(phy->clk); | |
707 | } | |
708 | ||
ba4bdc9e | 709 | snprintf(name, sizeof(name), "usb%d_reset", i); |
2a7f9982 MR |
710 | phy->reset = devm_reset_control_get(dev, name); |
711 | if (IS_ERR(phy->reset)) { | |
ba4bdc9e | 712 | dev_err(dev, "failed to get reset %s\n", name); |
2a7f9982 | 713 | return PTR_ERR(phy->reset); |
ba4bdc9e HG |
714 | } |
715 | ||
3ecc25e1 | 716 | if (i || data->cfg->phy0_dual_route) { /* No pmu for musb */ |
ba4bdc9e HG |
717 | snprintf(name, sizeof(name), "pmu%d", i); |
718 | res = platform_get_resource_byname(pdev, | |
719 | IORESOURCE_MEM, name); | |
2a7f9982 MR |
720 | phy->pmu = devm_ioremap_resource(dev, res); |
721 | if (IS_ERR(phy->pmu)) | |
722 | return PTR_ERR(phy->pmu); | |
ba4bdc9e HG |
723 | } |
724 | ||
dbc98635 | 725 | phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops); |
2a7f9982 | 726 | if (IS_ERR(phy->phy)) { |
ba4bdc9e | 727 | dev_err(dev, "failed to create PHY %d\n", i); |
2a7f9982 | 728 | return PTR_ERR(phy->phy); |
ba4bdc9e HG |
729 | } |
730 | ||
2a7f9982 MR |
731 | phy->index = i; |
732 | phy_set_drvdata(phy->phy, &data->phys[i]); | |
ba4bdc9e HG |
733 | } |
734 | ||
d2332303 | 735 | data->id_det_irq = gpiod_to_irq(data->id_det_gpio); |
5cf700ac | 736 | if (data->id_det_irq > 0) { |
d2332303 HG |
737 | ret = devm_request_irq(dev, data->id_det_irq, |
738 | sun4i_usb_phy0_id_vbus_det_irq, | |
739 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
740 | "usb0-id-det", data); | |
741 | if (ret) { | |
742 | dev_err(dev, "Err requesting id-det-irq: %d\n", ret); | |
743 | return ret; | |
744 | } | |
745 | } | |
746 | ||
91d96f06 | 747 | data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio); |
5cf700ac | 748 | if (data->vbus_det_irq > 0) { |
d2332303 HG |
749 | ret = devm_request_irq(dev, data->vbus_det_irq, |
750 | sun4i_usb_phy0_id_vbus_det_irq, | |
751 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
752 | "usb0-vbus-det", data); | |
753 | if (ret) { | |
754 | dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret); | |
755 | data->vbus_det_irq = -1; | |
756 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
757 | return ret; | |
758 | } | |
759 | } | |
760 | ||
8665c18b HG |
761 | if (data->vbus_power_supply) { |
762 | data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify; | |
763 | data->vbus_power_nb.priority = 0; | |
764 | ret = power_supply_reg_notifier(&data->vbus_power_nb); | |
765 | if (ret) { | |
766 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
767 | return ret; | |
768 | } | |
769 | data->vbus_power_nb_registered = true; | |
770 | } | |
771 | ||
ba4bdc9e | 772 | phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate); |
d2332303 HG |
773 | if (IS_ERR(phy_provider)) { |
774 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
775 | return PTR_ERR(phy_provider); | |
776 | } | |
ba4bdc9e | 777 | |
d2332303 | 778 | return 0; |
ba4bdc9e HG |
779 | } |
780 | ||
68dbc2ce HG |
781 | static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = { |
782 | .num_phys = 3, | |
783 | .type = sun4i_a10_phy, | |
784 | .disc_thresh = 3, | |
785 | .phyctl_offset = REG_PHYCTL_A10, | |
786 | .dedicated_clocks = false, | |
b3e0d141 | 787 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
788 | }; |
789 | ||
790 | static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = { | |
791 | .num_phys = 2, | |
792 | .type = sun4i_a10_phy, | |
793 | .disc_thresh = 2, | |
794 | .phyctl_offset = REG_PHYCTL_A10, | |
795 | .dedicated_clocks = false, | |
b3e0d141 | 796 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
797 | }; |
798 | ||
799 | static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = { | |
800 | .num_phys = 3, | |
91d96f06 | 801 | .type = sun6i_a31_phy, |
68dbc2ce HG |
802 | .disc_thresh = 3, |
803 | .phyctl_offset = REG_PHYCTL_A10, | |
804 | .dedicated_clocks = true, | |
b3e0d141 | 805 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
806 | }; |
807 | ||
808 | static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = { | |
809 | .num_phys = 3, | |
810 | .type = sun4i_a10_phy, | |
811 | .disc_thresh = 2, | |
812 | .phyctl_offset = REG_PHYCTL_A10, | |
813 | .dedicated_clocks = false, | |
b3e0d141 | 814 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
815 | }; |
816 | ||
817 | static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = { | |
818 | .num_phys = 2, | |
819 | .type = sun4i_a10_phy, | |
820 | .disc_thresh = 3, | |
821 | .phyctl_offset = REG_PHYCTL_A10, | |
822 | .dedicated_clocks = true, | |
b3e0d141 | 823 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
824 | }; |
825 | ||
826 | static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = { | |
827 | .num_phys = 2, | |
828 | .type = sun8i_a33_phy, | |
829 | .disc_thresh = 3, | |
830 | .phyctl_offset = REG_PHYCTL_A33, | |
831 | .dedicated_clocks = true, | |
b3e0d141 | 832 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
833 | }; |
834 | ||
626a630e RH |
835 | static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = { |
836 | .num_phys = 4, | |
837 | .type = sun8i_h3_phy, | |
838 | .disc_thresh = 3, | |
864ebdf0 | 839 | .phyctl_offset = REG_PHYCTL_A33, |
626a630e | 840 | .dedicated_clocks = true, |
b3e0d141 | 841 | .enable_pmu_unk1 = true, |
3ecc25e1 | 842 | .phy0_dual_route = true, |
b3e0d141 IZ |
843 | }; |
844 | ||
16c40361 IZ |
845 | static const struct sun4i_usb_phy_cfg sun8i_v3s_cfg = { |
846 | .num_phys = 1, | |
847 | .type = sun8i_v3s_phy, | |
848 | .disc_thresh = 3, | |
849 | .phyctl_offset = REG_PHYCTL_A33, | |
850 | .dedicated_clocks = true, | |
851 | .enable_pmu_unk1 = true, | |
852 | }; | |
853 | ||
b3e0d141 IZ |
854 | static const struct sun4i_usb_phy_cfg sun50i_a64_cfg = { |
855 | .num_phys = 2, | |
856 | .type = sun50i_a64_phy, | |
857 | .disc_thresh = 3, | |
858 | .phyctl_offset = REG_PHYCTL_A33, | |
859 | .dedicated_clocks = true, | |
860 | .enable_pmu_unk1 = true, | |
c957b7d2 | 861 | .phy0_dual_route = true, |
626a630e RH |
862 | }; |
863 | ||
ba4bdc9e | 864 | static const struct of_device_id sun4i_usb_phy_of_match[] = { |
68dbc2ce HG |
865 | { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg }, |
866 | { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg }, | |
867 | { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg }, | |
868 | { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg }, | |
869 | { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg }, | |
870 | { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg }, | |
626a630e | 871 | { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg }, |
16c40361 | 872 | { .compatible = "allwinner,sun8i-v3s-usb-phy", .data = &sun8i_v3s_cfg }, |
b3e0d141 IZ |
873 | { .compatible = "allwinner,sun50i-a64-usb-phy", |
874 | .data = &sun50i_a64_cfg}, | |
ba4bdc9e HG |
875 | { }, |
876 | }; | |
877 | MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match); | |
878 | ||
879 | static struct platform_driver sun4i_usb_phy_driver = { | |
880 | .probe = sun4i_usb_phy_probe, | |
d2332303 | 881 | .remove = sun4i_usb_phy_remove, |
ba4bdc9e HG |
882 | .driver = { |
883 | .of_match_table = sun4i_usb_phy_of_match, | |
884 | .name = "sun4i-usb-phy", | |
ba4bdc9e HG |
885 | } |
886 | }; | |
887 | module_platform_driver(sun4i_usb_phy_driver); | |
888 | ||
889 | MODULE_DESCRIPTION("Allwinner sun4i USB phy driver"); | |
890 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); | |
891 | MODULE_LICENSE("GPL v2"); |