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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> | |
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 |
626a630e RH |
52 | #define REG_PHY_UNK_H3 0x20 |
53 | ||
b3e0d141 | 54 | #define REG_PMU_UNK1 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, |
b3e0d141 | 102 | sun50i_a64_phy, |
68dbc2ce HG |
103 | }; |
104 | ||
105 | struct sun4i_usb_phy_cfg { | |
106 | int num_phys; | |
107 | enum sun4i_usb_phy_type type; | |
108 | u32 disc_thresh; | |
109 | u8 phyctl_offset; | |
110 | bool dedicated_clocks; | |
b3e0d141 | 111 | bool enable_pmu_unk1; |
68dbc2ce HG |
112 | }; |
113 | ||
ba4bdc9e | 114 | struct sun4i_usb_phy_data { |
ba4bdc9e | 115 | void __iomem *base; |
68dbc2ce | 116 | const struct sun4i_usb_phy_cfg *cfg; |
b33ecca8 | 117 | enum usb_dr_mode dr_mode; |
919ab252 | 118 | spinlock_t reg_lock; /* guard access to phyctl reg */ |
ba4bdc9e HG |
119 | struct sun4i_usb_phy { |
120 | struct phy *phy; | |
121 | void __iomem *pmu; | |
122 | struct regulator *vbus; | |
123 | struct reset_control *reset; | |
eadd4312 | 124 | struct clk *clk; |
d2332303 | 125 | bool regulator_on; |
ba4bdc9e HG |
126 | int index; |
127 | } phys[MAX_PHYS]; | |
d2332303 | 128 | /* phy0 / otg related variables */ |
1a52abe6 | 129 | struct extcon_dev *extcon; |
d2332303 | 130 | bool phy0_init; |
d2332303 HG |
131 | struct gpio_desc *id_det_gpio; |
132 | struct gpio_desc *vbus_det_gpio; | |
8665c18b HG |
133 | struct power_supply *vbus_power_supply; |
134 | struct notifier_block vbus_power_nb; | |
135 | bool vbus_power_nb_registered; | |
36f9159b | 136 | bool force_session_end; |
d2332303 HG |
137 | int id_det_irq; |
138 | int vbus_det_irq; | |
139 | int id_det; | |
140 | int vbus_det; | |
141 | struct delayed_work detect; | |
ba4bdc9e HG |
142 | }; |
143 | ||
144 | #define to_sun4i_usb_phy_data(phy) \ | |
145 | container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index]) | |
146 | ||
d2332303 HG |
147 | static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set) |
148 | { | |
149 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
150 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
151 | u32 iscr; | |
152 | ||
153 | iscr = readl(data->base + REG_ISCR); | |
154 | iscr &= ~clr; | |
155 | iscr |= set; | |
156 | writel(iscr, data->base + REG_ISCR); | |
157 | } | |
158 | ||
159 | static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val) | |
160 | { | |
161 | if (val) | |
162 | val = ISCR_FORCE_ID_HIGH; | |
163 | else | |
164 | val = ISCR_FORCE_ID_LOW; | |
165 | ||
166 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val); | |
167 | } | |
168 | ||
169 | static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val) | |
170 | { | |
171 | if (val) | |
172 | val = ISCR_FORCE_VBUS_HIGH; | |
173 | else | |
174 | val = ISCR_FORCE_VBUS_LOW; | |
175 | ||
176 | sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val); | |
177 | } | |
178 | ||
ba4bdc9e HG |
179 | static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data, |
180 | int len) | |
181 | { | |
182 | struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy); | |
183 | u32 temp, usbc_bit = BIT(phy->index * 2); | |
d99cb378 | 184 | void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset; |
919ab252 | 185 | unsigned long flags; |
ba4bdc9e HG |
186 | int i; |
187 | ||
919ab252 | 188 | spin_lock_irqsave(&phy_data->reg_lock, flags); |
ba4bdc9e | 189 | |
b3e0d141 IZ |
190 | if (phy_data->cfg->type == sun8i_a33_phy || |
191 | phy_data->cfg->type == sun50i_a64_phy) { | |
192 | /* A33 or A64 needs us to set phyctl to 0 explicitly */ | |
fc1f45ed | 193 | writel(0, phyctl); |
fc1f45ed HG |
194 | } |
195 | ||
ba4bdc9e | 196 | for (i = 0; i < len; i++) { |
fc1f45ed | 197 | temp = readl(phyctl); |
ba4bdc9e HG |
198 | |
199 | /* clear the address portion */ | |
200 | temp &= ~(0xff << 8); | |
201 | ||
202 | /* set the address */ | |
203 | temp |= ((addr + i) << 8); | |
fc1f45ed | 204 | writel(temp, phyctl); |
ba4bdc9e HG |
205 | |
206 | /* set the data bit and clear usbc bit*/ | |
fc1f45ed | 207 | temp = readb(phyctl); |
ba4bdc9e HG |
208 | if (data & 0x1) |
209 | temp |= PHYCTL_DATA; | |
210 | else | |
211 | temp &= ~PHYCTL_DATA; | |
212 | temp &= ~usbc_bit; | |
fc1f45ed | 213 | writeb(temp, phyctl); |
ba4bdc9e HG |
214 | |
215 | /* pulse usbc_bit */ | |
fc1f45ed | 216 | temp = readb(phyctl); |
ba4bdc9e | 217 | temp |= usbc_bit; |
fc1f45ed | 218 | writeb(temp, phyctl); |
ba4bdc9e | 219 | |
fc1f45ed | 220 | temp = readb(phyctl); |
ba4bdc9e | 221 | temp &= ~usbc_bit; |
fc1f45ed | 222 | writeb(temp, phyctl); |
ba4bdc9e HG |
223 | |
224 | data >>= 1; | |
225 | } | |
919ab252 CYT |
226 | |
227 | spin_unlock_irqrestore(&phy_data->reg_lock, flags); | |
ba4bdc9e HG |
228 | } |
229 | ||
230 | static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable) | |
231 | { | |
232 | u32 bits, reg_value; | |
233 | ||
234 | if (!phy->pmu) | |
235 | return; | |
236 | ||
237 | bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN | | |
238 | SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN; | |
239 | ||
240 | reg_value = readl(phy->pmu); | |
241 | ||
242 | if (enable) | |
243 | reg_value |= bits; | |
244 | else | |
245 | reg_value &= ~bits; | |
246 | ||
247 | writel(reg_value, phy->pmu); | |
248 | } | |
249 | ||
250 | static int sun4i_usb_phy_init(struct phy *_phy) | |
251 | { | |
252 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
253 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
254 | int ret; | |
626a630e | 255 | u32 val; |
ba4bdc9e | 256 | |
eadd4312 | 257 | ret = clk_prepare_enable(phy->clk); |
ba4bdc9e HG |
258 | if (ret) |
259 | return ret; | |
260 | ||
261 | ret = reset_control_deassert(phy->reset); | |
262 | if (ret) { | |
eadd4312 | 263 | clk_disable_unprepare(phy->clk); |
ba4bdc9e HG |
264 | return ret; |
265 | } | |
266 | ||
b3e0d141 IZ |
267 | if (data->cfg->enable_pmu_unk1) { |
268 | val = readl(phy->pmu + REG_PMU_UNK1); | |
269 | writel(val & ~2, phy->pmu + REG_PMU_UNK1); | |
270 | } | |
271 | ||
626a630e RH |
272 | if (data->cfg->type == sun8i_h3_phy) { |
273 | if (phy->index == 0) { | |
274 | val = readl(data->base + REG_PHY_UNK_H3); | |
275 | writel(val & ~1, data->base + REG_PHY_UNK_H3); | |
276 | } | |
626a630e RH |
277 | } else { |
278 | /* Enable USB 45 Ohm resistor calibration */ | |
279 | if (phy->index == 0) | |
280 | sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1); | |
6827a46f | 281 | |
626a630e RH |
282 | /* Adjust PHY's magnitude and rate */ |
283 | sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5); | |
ba4bdc9e | 284 | |
626a630e RH |
285 | /* Disconnect threshold adjustment */ |
286 | sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, | |
287 | data->cfg->disc_thresh, 2); | |
288 | } | |
ba4bdc9e HG |
289 | |
290 | sun4i_usb_phy_passby(phy, 1); | |
291 | ||
d2332303 HG |
292 | if (phy->index == 0) { |
293 | data->phy0_init = true; | |
294 | ||
295 | /* Enable pull-ups */ | |
296 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN); | |
297 | sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN); | |
298 | ||
b33ecca8 HG |
299 | /* Force ISCR and cable state updates */ |
300 | data->id_det = -1; | |
301 | data->vbus_det = -1; | |
302 | queue_delayed_work(system_wq, &data->detect, 0); | |
d2332303 HG |
303 | } |
304 | ||
ba4bdc9e HG |
305 | return 0; |
306 | } | |
307 | ||
308 | static int sun4i_usb_phy_exit(struct phy *_phy) | |
309 | { | |
310 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
311 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
312 | ||
313 | if (phy->index == 0) { | |
314 | /* Disable pull-ups */ | |
315 | sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0); | |
316 | sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0); | |
317 | data->phy0_init = false; | |
318 | } | |
ba4bdc9e HG |
319 | |
320 | sun4i_usb_phy_passby(phy, 0); | |
321 | reset_control_assert(phy->reset); | |
eadd4312 | 322 | clk_disable_unprepare(phy->clk); |
ba4bdc9e HG |
323 | |
324 | return 0; | |
325 | } | |
326 | ||
b33ecca8 HG |
327 | static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data) |
328 | { | |
329 | switch (data->dr_mode) { | |
330 | case USB_DR_MODE_OTG: | |
5f90d31c HG |
331 | if (data->id_det_gpio) |
332 | return gpiod_get_value_cansleep(data->id_det_gpio); | |
333 | else | |
334 | return 1; /* Fallback to peripheral mode */ | |
b33ecca8 HG |
335 | case USB_DR_MODE_HOST: |
336 | return 0; | |
337 | case USB_DR_MODE_PERIPHERAL: | |
338 | default: | |
339 | return 1; | |
340 | } | |
341 | } | |
342 | ||
3d772c4a HG |
343 | static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data) |
344 | { | |
345 | if (data->vbus_det_gpio) | |
346 | return gpiod_get_value_cansleep(data->vbus_det_gpio); | |
347 | ||
348 | if (data->vbus_power_supply) { | |
349 | union power_supply_propval val; | |
350 | int r; | |
351 | ||
352 | r = power_supply_get_property(data->vbus_power_supply, | |
353 | POWER_SUPPLY_PROP_PRESENT, &val); | |
354 | if (r == 0) | |
355 | return val.intval; | |
356 | } | |
357 | ||
358 | /* Fallback: report vbus as high */ | |
359 | return 1; | |
360 | } | |
361 | ||
362 | static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data) | |
363 | { | |
364 | return data->vbus_det_gpio || data->vbus_power_supply; | |
365 | } | |
366 | ||
91d96f06 HG |
367 | static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data) |
368 | { | |
369 | if ((data->id_det_gpio && data->id_det_irq <= 0) || | |
370 | (data->vbus_det_gpio && data->vbus_det_irq <= 0)) | |
371 | return true; | |
372 | ||
373 | /* | |
374 | * The A31 companion pmic (axp221) does not generate vbus change | |
375 | * interrupts when the board is driving vbus, so we must poll | |
376 | * when using the pmic for vbus-det _and_ we're driving vbus. | |
377 | */ | |
378 | if (data->cfg->type == sun6i_a31_phy && | |
379 | data->vbus_power_supply && data->phys[0].regulator_on) | |
380 | return true; | |
381 | ||
382 | return false; | |
383 | } | |
384 | ||
ba4bdc9e HG |
385 | static int sun4i_usb_phy_power_on(struct phy *_phy) |
386 | { | |
387 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
388 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
389 | int ret; | |
390 | ||
391 | if (!phy->vbus || phy->regulator_on) | |
392 | return 0; | |
393 | ||
394 | /* For phy0 only turn on Vbus if we don't have an ext. Vbus */ | |
8083526e | 395 | if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) && |
91d6e3b6 HG |
396 | data->vbus_det) { |
397 | dev_warn(&_phy->dev, "External vbus detected, not enabling our own vbus\n"); | |
d2332303 | 398 | return 0; |
91d6e3b6 | 399 | } |
ba4bdc9e | 400 | |
d2332303 HG |
401 | ret = regulator_enable(phy->vbus); |
402 | if (ret) | |
403 | return ret; | |
ba4bdc9e | 404 | |
d2332303 | 405 | phy->regulator_on = true; |
ba4bdc9e | 406 | |
d2332303 | 407 | /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */ |
91d96f06 | 408 | if (phy->index == 0 && sun4i_usb_phy0_poll(data)) |
d2332303 | 409 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); |
ba4bdc9e | 410 | |
d2332303 | 411 | return 0; |
ba4bdc9e HG |
412 | } |
413 | ||
414 | static int sun4i_usb_phy_power_off(struct phy *_phy) | |
415 | { | |
416 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
d2332303 HG |
417 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); |
418 | ||
419 | if (!phy->vbus || !phy->regulator_on) | |
420 | return 0; | |
ba4bdc9e | 421 | |
d2332303 HG |
422 | regulator_disable(phy->vbus); |
423 | phy->regulator_on = false; | |
ba4bdc9e | 424 | |
d2332303 HG |
425 | /* |
426 | * phy0 vbus typically slowly discharges, sometimes this causes the | |
427 | * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan. | |
428 | */ | |
91d96f06 | 429 | if (phy->index == 0 && !sun4i_usb_phy0_poll(data)) |
d2332303 | 430 | mod_delayed_work(system_wq, &data->detect, POLL_TIME); |
ba4bdc9e HG |
431 | |
432 | return 0; | |
433 | } | |
434 | ||
6ba43c29 HG |
435 | static int sun4i_usb_phy_set_mode(struct phy *_phy, enum phy_mode mode) |
436 | { | |
437 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
438 | struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy); | |
439 | ||
440 | if (phy->index != 0) | |
441 | return -EINVAL; | |
442 | ||
443 | switch (mode) { | |
444 | case PHY_MODE_USB_HOST: | |
445 | data->dr_mode = USB_DR_MODE_HOST; | |
446 | break; | |
447 | case PHY_MODE_USB_DEVICE: | |
448 | data->dr_mode = USB_DR_MODE_PERIPHERAL; | |
449 | break; | |
450 | case PHY_MODE_USB_OTG: | |
451 | data->dr_mode = USB_DR_MODE_OTG; | |
452 | break; | |
453 | default: | |
454 | return -EINVAL; | |
455 | } | |
456 | ||
457 | dev_info(&_phy->dev, "Changing dr_mode to %d\n", (int)data->dr_mode); | |
458 | data->force_session_end = true; | |
459 | queue_delayed_work(system_wq, &data->detect, 0); | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
24fe86a6 HG |
464 | void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled) |
465 | { | |
466 | struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); | |
467 | ||
468 | sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2); | |
469 | } | |
7167bf8b | 470 | EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect); |
24fe86a6 | 471 | |
4a9e5ca1 | 472 | static const struct phy_ops sun4i_usb_phy_ops = { |
ba4bdc9e HG |
473 | .init = sun4i_usb_phy_init, |
474 | .exit = sun4i_usb_phy_exit, | |
475 | .power_on = sun4i_usb_phy_power_on, | |
476 | .power_off = sun4i_usb_phy_power_off, | |
6ba43c29 | 477 | .set_mode = sun4i_usb_phy_set_mode, |
ba4bdc9e HG |
478 | .owner = THIS_MODULE, |
479 | }; | |
480 | ||
d2332303 HG |
481 | static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) |
482 | { | |
483 | struct sun4i_usb_phy_data *data = | |
484 | container_of(work, struct sun4i_usb_phy_data, detect.work); | |
485 | struct phy *phy0 = data->phys[0].phy; | |
36f9159b | 486 | bool force_session_end, id_notify = false, vbus_notify = false; |
9745ceeb | 487 | int id_det, vbus_det; |
d2332303 | 488 | |
b33ecca8 HG |
489 | if (phy0 == NULL) |
490 | return; | |
491 | ||
492 | id_det = sun4i_usb_phy0_get_id_det(data); | |
8665c18b | 493 | vbus_det = sun4i_usb_phy0_get_vbus_det(data); |
d2332303 HG |
494 | |
495 | mutex_lock(&phy0->mutex); | |
496 | ||
497 | if (!data->phy0_init) { | |
498 | mutex_unlock(&phy0->mutex); | |
499 | return; | |
500 | } | |
501 | ||
36f9159b HG |
502 | force_session_end = data->force_session_end; |
503 | data->force_session_end = false; | |
504 | ||
d2332303 | 505 | if (id_det != data->id_det) { |
36f9159b | 506 | /* id-change, force session end if we've no vbus detection */ |
b33ecca8 | 507 | if (data->dr_mode == USB_DR_MODE_OTG && |
36f9159b HG |
508 | !sun4i_usb_phy0_have_vbus_det(data)) |
509 | force_session_end = true; | |
510 | ||
511 | /* When entering host mode (id = 0) force end the session now */ | |
512 | if (force_session_end && id_det == 0) { | |
1aedf3a7 HG |
513 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); |
514 | msleep(200); | |
515 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
516 | } | |
d2332303 HG |
517 | sun4i_usb_phy0_set_id_detect(phy0, id_det); |
518 | data->id_det = id_det; | |
9745ceeb | 519 | id_notify = true; |
d2332303 HG |
520 | } |
521 | ||
522 | if (vbus_det != data->vbus_det) { | |
523 | sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det); | |
524 | data->vbus_det = vbus_det; | |
9745ceeb | 525 | vbus_notify = true; |
d2332303 HG |
526 | } |
527 | ||
528 | mutex_unlock(&phy0->mutex); | |
529 | ||
1aedf3a7 | 530 | if (id_notify) { |
1a52abe6 HG |
531 | extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST, |
532 | !id_det); | |
36f9159b HG |
533 | /* When leaving host mode force end the session here */ |
534 | if (force_session_end && id_det == 1) { | |
1aedf3a7 HG |
535 | mutex_lock(&phy0->mutex); |
536 | sun4i_usb_phy0_set_vbus_detect(phy0, 0); | |
537 | msleep(1000); | |
538 | sun4i_usb_phy0_set_vbus_detect(phy0, 1); | |
539 | mutex_unlock(&phy0->mutex); | |
540 | } | |
541 | } | |
1a52abe6 HG |
542 | |
543 | if (vbus_notify) | |
544 | extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det); | |
545 | ||
91d96f06 | 546 | if (sun4i_usb_phy0_poll(data)) |
d2332303 HG |
547 | queue_delayed_work(system_wq, &data->detect, POLL_TIME); |
548 | } | |
549 | ||
550 | static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id) | |
551 | { | |
552 | struct sun4i_usb_phy_data *data = dev_id; | |
553 | ||
554 | /* vbus or id changed, let the pins settle and then scan them */ | |
555 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
556 | ||
557 | return IRQ_HANDLED; | |
558 | } | |
559 | ||
8665c18b HG |
560 | static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb, |
561 | unsigned long val, void *v) | |
562 | { | |
563 | struct sun4i_usb_phy_data *data = | |
564 | container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb); | |
565 | struct power_supply *psy = v; | |
566 | ||
567 | /* Properties on the vbus_power_supply changed, scan vbus_det */ | |
568 | if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply) | |
569 | mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME); | |
570 | ||
571 | return NOTIFY_OK; | |
572 | } | |
573 | ||
ba4bdc9e HG |
574 | static struct phy *sun4i_usb_phy_xlate(struct device *dev, |
575 | struct of_phandle_args *args) | |
576 | { | |
577 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
578 | ||
5f90d31c | 579 | if (args->args[0] >= data->cfg->num_phys) |
ba4bdc9e HG |
580 | return ERR_PTR(-ENODEV); |
581 | ||
582 | return data->phys[args->args[0]].phy; | |
583 | } | |
584 | ||
d2332303 HG |
585 | static int sun4i_usb_phy_remove(struct platform_device *pdev) |
586 | { | |
587 | struct device *dev = &pdev->dev; | |
588 | struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); | |
589 | ||
8665c18b HG |
590 | if (data->vbus_power_nb_registered) |
591 | power_supply_unreg_notifier(&data->vbus_power_nb); | |
04e59a02 | 592 | if (data->id_det_irq > 0) |
d2332303 | 593 | devm_free_irq(dev, data->id_det_irq, data); |
04e59a02 | 594 | if (data->vbus_det_irq > 0) |
d2332303 HG |
595 | devm_free_irq(dev, data->vbus_det_irq, data); |
596 | ||
597 | cancel_delayed_work_sync(&data->detect); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
1a52abe6 HG |
602 | static const unsigned int sun4i_usb_phy0_cable[] = { |
603 | EXTCON_USB, | |
604 | EXTCON_USB_HOST, | |
605 | EXTCON_NONE, | |
606 | }; | |
607 | ||
ba4bdc9e HG |
608 | static int sun4i_usb_phy_probe(struct platform_device *pdev) |
609 | { | |
610 | struct sun4i_usb_phy_data *data; | |
611 | struct device *dev = &pdev->dev; | |
612 | struct device_node *np = dev->of_node; | |
ba4bdc9e | 613 | struct phy_provider *phy_provider; |
ba4bdc9e | 614 | struct resource *res; |
d2332303 | 615 | int i, ret; |
ba4bdc9e HG |
616 | |
617 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
618 | if (!data) | |
619 | return -ENOMEM; | |
620 | ||
919ab252 | 621 | spin_lock_init(&data->reg_lock); |
d2332303 HG |
622 | INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan); |
623 | dev_set_drvdata(dev, data); | |
68dbc2ce HG |
624 | data->cfg = of_device_get_match_data(dev); |
625 | if (!data->cfg) | |
626 | return -EINVAL; | |
fc1f45ed | 627 | |
ba4bdc9e HG |
628 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl"); |
629 | data->base = devm_ioremap_resource(dev, res); | |
630 | if (IS_ERR(data->base)) | |
631 | return PTR_ERR(data->base); | |
632 | ||
b2dfc34c AL |
633 | data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det", |
634 | GPIOD_IN); | |
635 | if (IS_ERR(data->id_det_gpio)) | |
636 | return PTR_ERR(data->id_det_gpio); | |
637 | ||
638 | data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det", | |
639 | GPIOD_IN); | |
640 | if (IS_ERR(data->vbus_det_gpio)) | |
641 | return PTR_ERR(data->vbus_det_gpio); | |
d2332303 | 642 | |
8665c18b HG |
643 | if (of_find_property(np, "usb0_vbus_power-supply", NULL)) { |
644 | data->vbus_power_supply = devm_power_supply_get_by_phandle(dev, | |
645 | "usb0_vbus_power-supply"); | |
646 | if (IS_ERR(data->vbus_power_supply)) | |
647 | return PTR_ERR(data->vbus_power_supply); | |
648 | ||
649 | if (!data->vbus_power_supply) | |
650 | return -EPROBE_DEFER; | |
651 | } | |
652 | ||
b33ecca8 | 653 | data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0); |
5f90d31c HG |
654 | |
655 | data->extcon = devm_extcon_dev_allocate(dev, sun4i_usb_phy0_cable); | |
656 | if (IS_ERR(data->extcon)) | |
657 | return PTR_ERR(data->extcon); | |
658 | ||
659 | ret = devm_extcon_dev_register(dev, data->extcon); | |
660 | if (ret) { | |
661 | dev_err(dev, "failed to register extcon: %d\n", ret); | |
662 | return ret; | |
1a52abe6 HG |
663 | } |
664 | ||
5f90d31c | 665 | for (i = 0; i < data->cfg->num_phys; i++) { |
2a7f9982 MR |
666 | struct sun4i_usb_phy *phy = data->phys + i; |
667 | char name[16]; | |
668 | ||
ba4bdc9e | 669 | snprintf(name, sizeof(name), "usb%d_vbus", i); |
2a7f9982 MR |
670 | phy->vbus = devm_regulator_get_optional(dev, name); |
671 | if (IS_ERR(phy->vbus)) { | |
672 | if (PTR_ERR(phy->vbus) == -EPROBE_DEFER) | |
ba4bdc9e | 673 | return -EPROBE_DEFER; |
2a7f9982 | 674 | phy->vbus = NULL; |
ba4bdc9e HG |
675 | } |
676 | ||
68dbc2ce | 677 | if (data->cfg->dedicated_clocks) |
eadd4312 MR |
678 | snprintf(name, sizeof(name), "usb%d_phy", i); |
679 | else | |
680 | strlcpy(name, "usb_phy", sizeof(name)); | |
681 | ||
682 | phy->clk = devm_clk_get(dev, name); | |
683 | if (IS_ERR(phy->clk)) { | |
684 | dev_err(dev, "failed to get clock %s\n", name); | |
685 | return PTR_ERR(phy->clk); | |
686 | } | |
687 | ||
ba4bdc9e | 688 | snprintf(name, sizeof(name), "usb%d_reset", i); |
2a7f9982 MR |
689 | phy->reset = devm_reset_control_get(dev, name); |
690 | if (IS_ERR(phy->reset)) { | |
ba4bdc9e | 691 | dev_err(dev, "failed to get reset %s\n", name); |
2a7f9982 | 692 | return PTR_ERR(phy->reset); |
ba4bdc9e HG |
693 | } |
694 | ||
695 | if (i) { /* No pmu for usbc0 */ | |
696 | snprintf(name, sizeof(name), "pmu%d", i); | |
697 | res = platform_get_resource_byname(pdev, | |
698 | IORESOURCE_MEM, name); | |
2a7f9982 MR |
699 | phy->pmu = devm_ioremap_resource(dev, res); |
700 | if (IS_ERR(phy->pmu)) | |
701 | return PTR_ERR(phy->pmu); | |
ba4bdc9e HG |
702 | } |
703 | ||
dbc98635 | 704 | phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops); |
2a7f9982 | 705 | if (IS_ERR(phy->phy)) { |
ba4bdc9e | 706 | dev_err(dev, "failed to create PHY %d\n", i); |
2a7f9982 | 707 | return PTR_ERR(phy->phy); |
ba4bdc9e HG |
708 | } |
709 | ||
2a7f9982 MR |
710 | phy->index = i; |
711 | phy_set_drvdata(phy->phy, &data->phys[i]); | |
ba4bdc9e HG |
712 | } |
713 | ||
d2332303 | 714 | data->id_det_irq = gpiod_to_irq(data->id_det_gpio); |
5cf700ac | 715 | if (data->id_det_irq > 0) { |
d2332303 HG |
716 | ret = devm_request_irq(dev, data->id_det_irq, |
717 | sun4i_usb_phy0_id_vbus_det_irq, | |
718 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
719 | "usb0-id-det", data); | |
720 | if (ret) { | |
721 | dev_err(dev, "Err requesting id-det-irq: %d\n", ret); | |
722 | return ret; | |
723 | } | |
724 | } | |
725 | ||
91d96f06 | 726 | data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio); |
5cf700ac | 727 | if (data->vbus_det_irq > 0) { |
d2332303 HG |
728 | ret = devm_request_irq(dev, data->vbus_det_irq, |
729 | sun4i_usb_phy0_id_vbus_det_irq, | |
730 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
731 | "usb0-vbus-det", data); | |
732 | if (ret) { | |
733 | dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret); | |
734 | data->vbus_det_irq = -1; | |
735 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
736 | return ret; | |
737 | } | |
738 | } | |
739 | ||
8665c18b HG |
740 | if (data->vbus_power_supply) { |
741 | data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify; | |
742 | data->vbus_power_nb.priority = 0; | |
743 | ret = power_supply_reg_notifier(&data->vbus_power_nb); | |
744 | if (ret) { | |
745 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
746 | return ret; | |
747 | } | |
748 | data->vbus_power_nb_registered = true; | |
749 | } | |
750 | ||
ba4bdc9e | 751 | phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate); |
d2332303 HG |
752 | if (IS_ERR(phy_provider)) { |
753 | sun4i_usb_phy_remove(pdev); /* Stop detect work */ | |
754 | return PTR_ERR(phy_provider); | |
755 | } | |
ba4bdc9e | 756 | |
d2332303 | 757 | return 0; |
ba4bdc9e HG |
758 | } |
759 | ||
68dbc2ce HG |
760 | static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = { |
761 | .num_phys = 3, | |
762 | .type = sun4i_a10_phy, | |
763 | .disc_thresh = 3, | |
764 | .phyctl_offset = REG_PHYCTL_A10, | |
765 | .dedicated_clocks = false, | |
b3e0d141 | 766 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
767 | }; |
768 | ||
769 | static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = { | |
770 | .num_phys = 2, | |
771 | .type = sun4i_a10_phy, | |
772 | .disc_thresh = 2, | |
773 | .phyctl_offset = REG_PHYCTL_A10, | |
774 | .dedicated_clocks = false, | |
b3e0d141 | 775 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
776 | }; |
777 | ||
778 | static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = { | |
779 | .num_phys = 3, | |
91d96f06 | 780 | .type = sun6i_a31_phy, |
68dbc2ce HG |
781 | .disc_thresh = 3, |
782 | .phyctl_offset = REG_PHYCTL_A10, | |
783 | .dedicated_clocks = true, | |
b3e0d141 | 784 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
785 | }; |
786 | ||
787 | static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = { | |
788 | .num_phys = 3, | |
789 | .type = sun4i_a10_phy, | |
790 | .disc_thresh = 2, | |
791 | .phyctl_offset = REG_PHYCTL_A10, | |
792 | .dedicated_clocks = false, | |
b3e0d141 | 793 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
794 | }; |
795 | ||
796 | static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = { | |
797 | .num_phys = 2, | |
798 | .type = sun4i_a10_phy, | |
799 | .disc_thresh = 3, | |
800 | .phyctl_offset = REG_PHYCTL_A10, | |
801 | .dedicated_clocks = true, | |
b3e0d141 | 802 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
803 | }; |
804 | ||
805 | static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = { | |
806 | .num_phys = 2, | |
807 | .type = sun8i_a33_phy, | |
808 | .disc_thresh = 3, | |
809 | .phyctl_offset = REG_PHYCTL_A33, | |
810 | .dedicated_clocks = true, | |
b3e0d141 | 811 | .enable_pmu_unk1 = false, |
68dbc2ce HG |
812 | }; |
813 | ||
626a630e RH |
814 | static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = { |
815 | .num_phys = 4, | |
816 | .type = sun8i_h3_phy, | |
817 | .disc_thresh = 3, | |
818 | .dedicated_clocks = true, | |
b3e0d141 IZ |
819 | .enable_pmu_unk1 = true, |
820 | }; | |
821 | ||
822 | static const struct sun4i_usb_phy_cfg sun50i_a64_cfg = { | |
823 | .num_phys = 2, | |
824 | .type = sun50i_a64_phy, | |
825 | .disc_thresh = 3, | |
826 | .phyctl_offset = REG_PHYCTL_A33, | |
827 | .dedicated_clocks = true, | |
828 | .enable_pmu_unk1 = true, | |
626a630e RH |
829 | }; |
830 | ||
ba4bdc9e | 831 | static const struct of_device_id sun4i_usb_phy_of_match[] = { |
68dbc2ce HG |
832 | { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg }, |
833 | { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg }, | |
834 | { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg }, | |
835 | { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg }, | |
836 | { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg }, | |
837 | { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg }, | |
626a630e | 838 | { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg }, |
b3e0d141 IZ |
839 | { .compatible = "allwinner,sun50i-a64-usb-phy", |
840 | .data = &sun50i_a64_cfg}, | |
ba4bdc9e HG |
841 | { }, |
842 | }; | |
843 | MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match); | |
844 | ||
845 | static struct platform_driver sun4i_usb_phy_driver = { | |
846 | .probe = sun4i_usb_phy_probe, | |
d2332303 | 847 | .remove = sun4i_usb_phy_remove, |
ba4bdc9e HG |
848 | .driver = { |
849 | .of_match_table = sun4i_usb_phy_of_match, | |
850 | .name = "sun4i-usb-phy", | |
ba4bdc9e HG |
851 | } |
852 | }; | |
853 | module_platform_driver(sun4i_usb_phy_driver); | |
854 | ||
855 | MODULE_DESCRIPTION("Allwinner sun4i USB phy driver"); | |
856 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); | |
857 | MODULE_LICENSE("GPL v2"); |