blob: 5138843ec42d33a3af5d08c655119f3e4adfca65 [file] [log] [blame]
Hans de Goedeba4bdc92014-03-01 18:09:26 +01001/*
2 * Allwinner sun4i USB phy driver
3 *
Hans de Goeded2332302015-06-13 14:37:45 +02004 * Copyright (C) 2014-2015 Hans de Goede <hdegoede@redhat.com>
Hans de Goedeba4bdc92014-03-01 18:09:26 +01005 *
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>
Hans de Goede1aedf3a2015-06-13 14:37:50 +020025#include <linux/delay.h>
Sachin Kamat2d84aff2014-05-29 12:00:49 +053026#include <linux/err.h>
Hans de Goede1a52abe2015-06-13 14:37:46 +020027#include <linux/extcon.h>
Hans de Goedeba4bdc92014-03-01 18:09:26 +010028#include <linux/io.h>
Hans de Goeded2332302015-06-13 14:37:45 +020029#include <linux/interrupt.h>
Hans de Goedeba4bdc92014-03-01 18:09:26 +010030#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>
Hans de Goeded2332302015-06-13 14:37:45 +020035#include <linux/of_gpio.h>
Hans de Goedeba4bdc92014-03-01 18:09:26 +010036#include <linux/phy/phy.h>
Hans de Goede24fe86a2015-03-29 12:50:46 +020037#include <linux/phy/phy-sun4i-usb.h>
Hans de Goedeba4bdc92014-03-01 18:09:26 +010038#include <linux/platform_device.h>
Hans de Goede8665c182015-06-13 14:37:51 +020039#include <linux/power_supply.h>
Hans de Goedeba4bdc92014-03-01 18:09:26 +010040#include <linux/regulator/consumer.h>
41#include <linux/reset.h>
Hans de Goeded2332302015-06-13 14:37:45 +020042#include <linux/workqueue.h>
Hans de Goedeba4bdc92014-03-01 18:09:26 +010043
44#define REG_ISCR 0x00
Hans de Goedefc1f45e2015-06-13 14:37:49 +020045#define REG_PHYCTL_A10 0x04
Hans de Goedeba4bdc92014-03-01 18:09:26 +010046#define REG_PHYBIST 0x08
47#define REG_PHYTUNE 0x0c
Hans de Goedefc1f45e2015-06-13 14:37:49 +020048#define REG_PHYCTL_A33 0x10
Hans de Goedeba4bdc92014-03-01 18:09:26 +010049
50#define PHYCTL_DATA BIT(7)
51
52#define SUNXI_AHB_ICHR8_EN BIT(10)
53#define SUNXI_AHB_INCR4_BURST_EN BIT(9)
54#define SUNXI_AHB_INCRX_ALIGN_EN BIT(8)
55#define SUNXI_ULPI_BYPASS_EN BIT(0)
56
Hans de Goeded2332302015-06-13 14:37:45 +020057/* ISCR, Interface Status and Control bits */
58#define ISCR_ID_PULLUP_EN (1 << 17)
59#define ISCR_DPDM_PULLUP_EN (1 << 16)
60/* sunxi has the phy id/vbus pins not connected, so we use the force bits */
61#define ISCR_FORCE_ID_MASK (3 << 14)
62#define ISCR_FORCE_ID_LOW (2 << 14)
63#define ISCR_FORCE_ID_HIGH (3 << 14)
64#define ISCR_FORCE_VBUS_MASK (3 << 12)
65#define ISCR_FORCE_VBUS_LOW (2 << 12)
66#define ISCR_FORCE_VBUS_HIGH (3 << 12)
67
Hans de Goedeba4bdc92014-03-01 18:09:26 +010068/* Common Control Bits for Both PHYs */
69#define PHY_PLL_BW 0x03
70#define PHY_RES45_CAL_EN 0x0c
71
72/* Private Control Bits for Each PHY */
73#define PHY_TX_AMPLITUDE_TUNE 0x20
74#define PHY_TX_SLEWRATE_TUNE 0x22
75#define PHY_VBUSVALID_TH_SEL 0x25
76#define PHY_PULLUP_RES_SEL 0x27
77#define PHY_OTG_FUNC_EN 0x28
78#define PHY_VBUS_DET_EN 0x29
79#define PHY_DISCON_TH_SEL 0x2a
Hans de Goede24fe86a2015-03-29 12:50:46 +020080#define PHY_SQUELCH_DETECT 0x3c
Hans de Goedeba4bdc92014-03-01 18:09:26 +010081
82#define MAX_PHYS 3
83
Hans de Goeded2332302015-06-13 14:37:45 +020084/*
85 * Note do not raise the debounce time, we must report Vusb high within 100ms
86 * otherwise we get Vbus errors
87 */
88#define DEBOUNCE_TIME msecs_to_jiffies(50)
89#define POLL_TIME msecs_to_jiffies(250)
90
Hans de Goedeba4bdc92014-03-01 18:09:26 +010091struct sun4i_usb_phy_data {
Hans de Goedeba4bdc92014-03-01 18:09:26 +010092 void __iomem *base;
93 struct mutex mutex;
94 int num_phys;
95 u32 disc_thresh;
Hans de Goedefc1f45e2015-06-13 14:37:49 +020096 bool has_a33_phyctl;
Hans de Goedeba4bdc92014-03-01 18:09:26 +010097 struct sun4i_usb_phy {
98 struct phy *phy;
99 void __iomem *pmu;
100 struct regulator *vbus;
101 struct reset_control *reset;
Maxime Ripardeadd4312014-05-13 17:44:18 +0200102 struct clk *clk;
Hans de Goeded2332302015-06-13 14:37:45 +0200103 bool regulator_on;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100104 int index;
105 } phys[MAX_PHYS];
Hans de Goeded2332302015-06-13 14:37:45 +0200106 /* phy0 / otg related variables */
Hans de Goede1a52abe2015-06-13 14:37:46 +0200107 struct extcon_dev *extcon;
Hans de Goeded2332302015-06-13 14:37:45 +0200108 bool phy0_init;
109 bool phy0_poll;
110 struct gpio_desc *id_det_gpio;
111 struct gpio_desc *vbus_det_gpio;
Hans de Goede8665c182015-06-13 14:37:51 +0200112 struct power_supply *vbus_power_supply;
113 struct notifier_block vbus_power_nb;
114 bool vbus_power_nb_registered;
Hans de Goeded2332302015-06-13 14:37:45 +0200115 int id_det_irq;
116 int vbus_det_irq;
117 int id_det;
118 int vbus_det;
119 struct delayed_work detect;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100120};
121
122#define to_sun4i_usb_phy_data(phy) \
123 container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index])
124
Hans de Goeded2332302015-06-13 14:37:45 +0200125static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set)
126{
127 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
128 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
129 u32 iscr;
130
131 iscr = readl(data->base + REG_ISCR);
132 iscr &= ~clr;
133 iscr |= set;
134 writel(iscr, data->base + REG_ISCR);
135}
136
137static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val)
138{
139 if (val)
140 val = ISCR_FORCE_ID_HIGH;
141 else
142 val = ISCR_FORCE_ID_LOW;
143
144 sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val);
145}
146
147static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val)
148{
149 if (val)
150 val = ISCR_FORCE_VBUS_HIGH;
151 else
152 val = ISCR_FORCE_VBUS_LOW;
153
154 sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val);
155}
156
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100157static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
158 int len)
159{
160 struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
161 u32 temp, usbc_bit = BIT(phy->index * 2);
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200162 void *phyctl;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100163 int i;
164
165 mutex_lock(&phy_data->mutex);
166
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200167 if (phy_data->has_a33_phyctl) {
168 phyctl = phy_data->base + REG_PHYCTL_A33;
169 /* A33 needs us to set phyctl to 0 explicitly */
170 writel(0, phyctl);
171 } else {
172 phyctl = phy_data->base + REG_PHYCTL_A10;
173 }
174
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100175 for (i = 0; i < len; i++) {
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200176 temp = readl(phyctl);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100177
178 /* clear the address portion */
179 temp &= ~(0xff << 8);
180
181 /* set the address */
182 temp |= ((addr + i) << 8);
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200183 writel(temp, phyctl);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100184
185 /* set the data bit and clear usbc bit*/
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200186 temp = readb(phyctl);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100187 if (data & 0x1)
188 temp |= PHYCTL_DATA;
189 else
190 temp &= ~PHYCTL_DATA;
191 temp &= ~usbc_bit;
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200192 writeb(temp, phyctl);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100193
194 /* pulse usbc_bit */
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200195 temp = readb(phyctl);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100196 temp |= usbc_bit;
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200197 writeb(temp, phyctl);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100198
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200199 temp = readb(phyctl);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100200 temp &= ~usbc_bit;
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200201 writeb(temp, phyctl);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100202
203 data >>= 1;
204 }
205 mutex_unlock(&phy_data->mutex);
206}
207
208static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
209{
210 u32 bits, reg_value;
211
212 if (!phy->pmu)
213 return;
214
215 bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
216 SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
217
218 reg_value = readl(phy->pmu);
219
220 if (enable)
221 reg_value |= bits;
222 else
223 reg_value &= ~bits;
224
225 writel(reg_value, phy->pmu);
226}
227
228static int sun4i_usb_phy_init(struct phy *_phy)
229{
230 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
231 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
232 int ret;
233
Maxime Ripardeadd4312014-05-13 17:44:18 +0200234 ret = clk_prepare_enable(phy->clk);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100235 if (ret)
236 return ret;
237
238 ret = reset_control_deassert(phy->reset);
239 if (ret) {
Maxime Ripardeadd4312014-05-13 17:44:18 +0200240 clk_disable_unprepare(phy->clk);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100241 return ret;
242 }
243
Roman Byshko6827a46f2014-11-10 19:55:06 +0100244 /* Enable USB 45 Ohm resistor calibration */
245 if (phy->index == 0)
246 sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
247
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100248 /* Adjust PHY's magnitude and rate */
249 sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
250
251 /* Disconnect threshold adjustment */
252 sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, data->disc_thresh, 2);
253
254 sun4i_usb_phy_passby(phy, 1);
255
Hans de Goeded2332302015-06-13 14:37:45 +0200256 if (phy->index == 0) {
257 data->phy0_init = true;
258
259 /* Enable pull-ups */
260 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
261 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
262
263 if (data->id_det_gpio) {
264 /* OTG mode, force ISCR and cable state updates */
265 data->id_det = -1;
266 data->vbus_det = -1;
267 queue_delayed_work(system_wq, &data->detect, 0);
268 } else {
269 /* Host only mode */
270 sun4i_usb_phy0_set_id_detect(_phy, 0);
271 sun4i_usb_phy0_set_vbus_detect(_phy, 1);
272 }
273 }
274
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100275 return 0;
276}
277
278static int sun4i_usb_phy_exit(struct phy *_phy)
279{
280 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
Hans de Goeded2332302015-06-13 14:37:45 +0200281 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
282
283 if (phy->index == 0) {
284 /* Disable pull-ups */
285 sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0);
286 sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0);
287 data->phy0_init = false;
288 }
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100289
290 sun4i_usb_phy_passby(phy, 0);
291 reset_control_assert(phy->reset);
Maxime Ripardeadd4312014-05-13 17:44:18 +0200292 clk_disable_unprepare(phy->clk);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100293
294 return 0;
295}
296
297static int sun4i_usb_phy_power_on(struct phy *_phy)
298{
299 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
Hans de Goeded2332302015-06-13 14:37:45 +0200300 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
301 int ret;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100302
Hans de Goeded2332302015-06-13 14:37:45 +0200303 if (!phy->vbus || phy->regulator_on)
304 return 0;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100305
Hans de Goeded2332302015-06-13 14:37:45 +0200306 /* For phy0 only turn on Vbus if we don't have an ext. Vbus */
307 if (phy->index == 0 && data->vbus_det)
308 return 0;
309
310 ret = regulator_enable(phy->vbus);
311 if (ret)
312 return ret;
313
314 phy->regulator_on = true;
315
316 /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200317 if (phy->index == 0 && data->vbus_det_gpio && data->phy0_poll)
Hans de Goeded2332302015-06-13 14:37:45 +0200318 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
319
320 return 0;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100321}
322
323static int sun4i_usb_phy_power_off(struct phy *_phy)
324{
325 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
Hans de Goeded2332302015-06-13 14:37:45 +0200326 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100327
Hans de Goeded2332302015-06-13 14:37:45 +0200328 if (!phy->vbus || !phy->regulator_on)
329 return 0;
330
331 regulator_disable(phy->vbus);
332 phy->regulator_on = false;
333
334 /*
335 * phy0 vbus typically slowly discharges, sometimes this causes the
336 * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
337 */
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200338 if (phy->index == 0 && data->vbus_det_gpio && !data->phy0_poll)
Hans de Goeded2332302015-06-13 14:37:45 +0200339 mod_delayed_work(system_wq, &data->detect, POLL_TIME);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100340
341 return 0;
342}
343
Hans de Goede24fe86a2015-03-29 12:50:46 +0200344void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled)
345{
346 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
347
348 sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);
349}
350
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100351static struct phy_ops sun4i_usb_phy_ops = {
352 .init = sun4i_usb_phy_init,
353 .exit = sun4i_usb_phy_exit,
354 .power_on = sun4i_usb_phy_power_on,
355 .power_off = sun4i_usb_phy_power_off,
356 .owner = THIS_MODULE,
357};
358
Hans de Goede8665c182015-06-13 14:37:51 +0200359static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data)
360{
361 if (data->vbus_det_gpio)
362 return gpiod_get_value_cansleep(data->vbus_det_gpio);
363
364 if (data->vbus_power_supply) {
365 union power_supply_propval val;
366 int r;
367
368 r = power_supply_get_property(data->vbus_power_supply,
369 POWER_SUPPLY_PROP_PRESENT, &val);
370 if (r == 0)
371 return val.intval;
372 }
373
374 /* Fallback: report vbus as high */
375 return 1;
376}
377
378static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data)
379{
380 return data->vbus_det_gpio || data->vbus_power_supply;
381}
382
Hans de Goeded2332302015-06-13 14:37:45 +0200383static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
384{
385 struct sun4i_usb_phy_data *data =
386 container_of(work, struct sun4i_usb_phy_data, detect.work);
387 struct phy *phy0 = data->phys[0].phy;
Hans de Goede1a52abe2015-06-13 14:37:46 +0200388 int id_det, vbus_det, id_notify = 0, vbus_notify = 0;
Hans de Goeded2332302015-06-13 14:37:45 +0200389
390 id_det = gpiod_get_value_cansleep(data->id_det_gpio);
Hans de Goede8665c182015-06-13 14:37:51 +0200391 vbus_det = sun4i_usb_phy0_get_vbus_det(data);
Hans de Goeded2332302015-06-13 14:37:45 +0200392
393 mutex_lock(&phy0->mutex);
394
395 if (!data->phy0_init) {
396 mutex_unlock(&phy0->mutex);
397 return;
398 }
399
400 if (id_det != data->id_det) {
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200401 /*
402 * When a host cable (id == 0) gets plugged in on systems
403 * without vbus detection report vbus low for long enough for
404 * the musb-ip to end the current device session.
405 */
Hans de Goede8665c182015-06-13 14:37:51 +0200406 if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) {
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200407 sun4i_usb_phy0_set_vbus_detect(phy0, 0);
408 msleep(200);
409 sun4i_usb_phy0_set_vbus_detect(phy0, 1);
410 }
Hans de Goeded2332302015-06-13 14:37:45 +0200411 sun4i_usb_phy0_set_id_detect(phy0, id_det);
412 data->id_det = id_det;
Hans de Goede1a52abe2015-06-13 14:37:46 +0200413 id_notify = 1;
Hans de Goeded2332302015-06-13 14:37:45 +0200414 }
415
416 if (vbus_det != data->vbus_det) {
417 sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
418 data->vbus_det = vbus_det;
Hans de Goede1a52abe2015-06-13 14:37:46 +0200419 vbus_notify = 1;
Hans de Goeded2332302015-06-13 14:37:45 +0200420 }
421
422 mutex_unlock(&phy0->mutex);
423
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200424 if (id_notify) {
Hans de Goede1a52abe2015-06-13 14:37:46 +0200425 extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST,
426 !id_det);
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200427 /*
428 * When a host cable gets unplugged (id == 1) on systems
429 * without vbus detection report vbus low for long enough to
430 * the musb-ip to end the current host session.
431 */
Hans de Goede8665c182015-06-13 14:37:51 +0200432 if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) {
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200433 mutex_lock(&phy0->mutex);
434 sun4i_usb_phy0_set_vbus_detect(phy0, 0);
435 msleep(1000);
436 sun4i_usb_phy0_set_vbus_detect(phy0, 1);
437 mutex_unlock(&phy0->mutex);
438 }
439 }
Hans de Goede1a52abe2015-06-13 14:37:46 +0200440
441 if (vbus_notify)
442 extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det);
443
Hans de Goeded2332302015-06-13 14:37:45 +0200444 if (data->phy0_poll)
445 queue_delayed_work(system_wq, &data->detect, POLL_TIME);
446}
447
448static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id)
449{
450 struct sun4i_usb_phy_data *data = dev_id;
451
452 /* vbus or id changed, let the pins settle and then scan them */
453 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
454
455 return IRQ_HANDLED;
456}
457
Hans de Goede8665c182015-06-13 14:37:51 +0200458static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb,
459 unsigned long val, void *v)
460{
461 struct sun4i_usb_phy_data *data =
462 container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb);
463 struct power_supply *psy = v;
464
465 /* Properties on the vbus_power_supply changed, scan vbus_det */
466 if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply)
467 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
468
469 return NOTIFY_OK;
470}
471
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100472static struct phy *sun4i_usb_phy_xlate(struct device *dev,
473 struct of_phandle_args *args)
474{
475 struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
476
Roman Byshko6827a46f2014-11-10 19:55:06 +0100477 if (args->args[0] >= data->num_phys)
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100478 return ERR_PTR(-ENODEV);
479
480 return data->phys[args->args[0]].phy;
481}
482
Hans de Goeded2332302015-06-13 14:37:45 +0200483static int sun4i_usb_phy_remove(struct platform_device *pdev)
484{
485 struct device *dev = &pdev->dev;
486 struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
487
Hans de Goede8665c182015-06-13 14:37:51 +0200488 if (data->vbus_power_nb_registered)
489 power_supply_unreg_notifier(&data->vbus_power_nb);
Hans de Goeded2332302015-06-13 14:37:45 +0200490 if (data->id_det_irq >= 0)
491 devm_free_irq(dev, data->id_det_irq, data);
492 if (data->vbus_det_irq >= 0)
493 devm_free_irq(dev, data->vbus_det_irq, data);
494
495 cancel_delayed_work_sync(&data->detect);
496
497 return 0;
498}
499
Hans de Goede1a52abe2015-06-13 14:37:46 +0200500static const unsigned int sun4i_usb_phy0_cable[] = {
501 EXTCON_USB,
502 EXTCON_USB_HOST,
503 EXTCON_NONE,
504};
505
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100506static int sun4i_usb_phy_probe(struct platform_device *pdev)
507{
508 struct sun4i_usb_phy_data *data;
509 struct device *dev = &pdev->dev;
510 struct device_node *np = dev->of_node;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100511 struct phy_provider *phy_provider;
Maxime Ripardeadd4312014-05-13 17:44:18 +0200512 bool dedicated_clocks;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100513 struct resource *res;
Hans de Goeded2332302015-06-13 14:37:45 +0200514 int i, ret;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100515
516 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
517 if (!data)
518 return -ENOMEM;
519
520 mutex_init(&data->mutex);
Hans de Goeded2332302015-06-13 14:37:45 +0200521 INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
522 dev_set_drvdata(dev, data);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100523
Hans de Goede123dfdb2015-06-13 14:37:48 +0200524 if (of_device_is_compatible(np, "allwinner,sun5i-a13-usb-phy") ||
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200525 of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") ||
526 of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100527 data->num_phys = 2;
528 else
529 data->num_phys = 3;
530
Hans de Goede28464692015-06-13 14:37:47 +0200531 if (of_device_is_compatible(np, "allwinner,sun5i-a13-usb-phy") ||
532 of_device_is_compatible(np, "allwinner,sun7i-a20-usb-phy"))
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100533 data->disc_thresh = 2;
Hans de Goede28464692015-06-13 14:37:47 +0200534 else
535 data->disc_thresh = 3;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100536
Hans de Goede123dfdb2015-06-13 14:37:48 +0200537 if (of_device_is_compatible(np, "allwinner,sun6i-a31-usb-phy") ||
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200538 of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") ||
539 of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
Maxime Ripardeadd4312014-05-13 17:44:18 +0200540 dedicated_clocks = true;
541 else
542 dedicated_clocks = false;
543
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200544 if (of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
545 data->has_a33_phyctl = true;
546
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100547 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
548 data->base = devm_ioremap_resource(dev, res);
549 if (IS_ERR(data->base))
550 return PTR_ERR(data->base);
551
Hans de Goeded2332302015-06-13 14:37:45 +0200552 data->id_det_gpio = devm_gpiod_get(dev, "usb0_id_det", GPIOD_IN);
553 if (IS_ERR(data->id_det_gpio)) {
554 if (PTR_ERR(data->id_det_gpio) == -EPROBE_DEFER)
555 return -EPROBE_DEFER;
556 data->id_det_gpio = NULL;
557 }
558
559 data->vbus_det_gpio = devm_gpiod_get(dev, "usb0_vbus_det", GPIOD_IN);
560 if (IS_ERR(data->vbus_det_gpio)) {
561 if (PTR_ERR(data->vbus_det_gpio) == -EPROBE_DEFER)
562 return -EPROBE_DEFER;
563 data->vbus_det_gpio = NULL;
564 }
565
Hans de Goede8665c182015-06-13 14:37:51 +0200566 if (of_find_property(np, "usb0_vbus_power-supply", NULL)) {
567 data->vbus_power_supply = devm_power_supply_get_by_phandle(dev,
568 "usb0_vbus_power-supply");
569 if (IS_ERR(data->vbus_power_supply))
570 return PTR_ERR(data->vbus_power_supply);
571
572 if (!data->vbus_power_supply)
573 return -EPROBE_DEFER;
574 }
575
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200576 /* vbus_det without id_det makes no sense, and is not supported */
Hans de Goede8665c182015-06-13 14:37:51 +0200577 if (sun4i_usb_phy0_have_vbus_det(data) && !data->id_det_gpio) {
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200578 dev_err(dev, "usb0_id_det missing or invalid\n");
Hans de Goeded2332302015-06-13 14:37:45 +0200579 return -ENODEV;
580 }
581
Hans de Goede1a52abe2015-06-13 14:37:46 +0200582 if (data->id_det_gpio) {
583 data->extcon = devm_extcon_dev_allocate(dev,
584 sun4i_usb_phy0_cable);
585 if (IS_ERR(data->extcon))
586 return PTR_ERR(data->extcon);
587
588 ret = devm_extcon_dev_register(dev, data->extcon);
589 if (ret) {
590 dev_err(dev, "failed to register extcon: %d\n", ret);
591 return ret;
592 }
593 }
594
Roman Byshko6827a46f2014-11-10 19:55:06 +0100595 for (i = 0; i < data->num_phys; i++) {
Maxime Ripard2a7f9982014-05-13 17:44:17 +0200596 struct sun4i_usb_phy *phy = data->phys + i;
597 char name[16];
598
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100599 snprintf(name, sizeof(name), "usb%d_vbus", i);
Maxime Ripard2a7f9982014-05-13 17:44:17 +0200600 phy->vbus = devm_regulator_get_optional(dev, name);
601 if (IS_ERR(phy->vbus)) {
602 if (PTR_ERR(phy->vbus) == -EPROBE_DEFER)
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100603 return -EPROBE_DEFER;
Maxime Ripard2a7f9982014-05-13 17:44:17 +0200604 phy->vbus = NULL;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100605 }
606
Maxime Ripardeadd4312014-05-13 17:44:18 +0200607 if (dedicated_clocks)
608 snprintf(name, sizeof(name), "usb%d_phy", i);
609 else
610 strlcpy(name, "usb_phy", sizeof(name));
611
612 phy->clk = devm_clk_get(dev, name);
613 if (IS_ERR(phy->clk)) {
614 dev_err(dev, "failed to get clock %s\n", name);
615 return PTR_ERR(phy->clk);
616 }
617
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100618 snprintf(name, sizeof(name), "usb%d_reset", i);
Maxime Ripard2a7f9982014-05-13 17:44:17 +0200619 phy->reset = devm_reset_control_get(dev, name);
620 if (IS_ERR(phy->reset)) {
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100621 dev_err(dev, "failed to get reset %s\n", name);
Maxime Ripard2a7f9982014-05-13 17:44:17 +0200622 return PTR_ERR(phy->reset);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100623 }
624
625 if (i) { /* No pmu for usbc0 */
626 snprintf(name, sizeof(name), "pmu%d", i);
627 res = platform_get_resource_byname(pdev,
628 IORESOURCE_MEM, name);
Maxime Ripard2a7f9982014-05-13 17:44:17 +0200629 phy->pmu = devm_ioremap_resource(dev, res);
630 if (IS_ERR(phy->pmu))
631 return PTR_ERR(phy->pmu);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100632 }
633
Heikki Krogerusdbc98632014-11-19 17:28:21 +0200634 phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops);
Maxime Ripard2a7f9982014-05-13 17:44:17 +0200635 if (IS_ERR(phy->phy)) {
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100636 dev_err(dev, "failed to create PHY %d\n", i);
Maxime Ripard2a7f9982014-05-13 17:44:17 +0200637 return PTR_ERR(phy->phy);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100638 }
639
Maxime Ripard2a7f9982014-05-13 17:44:17 +0200640 phy->index = i;
641 phy_set_drvdata(phy->phy, &data->phys[i]);
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100642 }
643
Hans de Goeded2332302015-06-13 14:37:45 +0200644 data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
645 data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
Hans de Goede1aedf3a2015-06-13 14:37:50 +0200646 if ((data->id_det_gpio && data->id_det_irq < 0) ||
647 (data->vbus_det_gpio && data->vbus_det_irq < 0))
Hans de Goeded2332302015-06-13 14:37:45 +0200648 data->phy0_poll = true;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100649
Hans de Goeded2332302015-06-13 14:37:45 +0200650 if (data->id_det_irq >= 0) {
651 ret = devm_request_irq(dev, data->id_det_irq,
652 sun4i_usb_phy0_id_vbus_det_irq,
653 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
654 "usb0-id-det", data);
655 if (ret) {
656 dev_err(dev, "Err requesting id-det-irq: %d\n", ret);
657 return ret;
658 }
659 }
660
661 if (data->vbus_det_irq >= 0) {
662 ret = devm_request_irq(dev, data->vbus_det_irq,
663 sun4i_usb_phy0_id_vbus_det_irq,
664 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
665 "usb0-vbus-det", data);
666 if (ret) {
667 dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret);
668 data->vbus_det_irq = -1;
669 sun4i_usb_phy_remove(pdev); /* Stop detect work */
670 return ret;
671 }
672 }
673
Hans de Goede8665c182015-06-13 14:37:51 +0200674 if (data->vbus_power_supply) {
675 data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify;
676 data->vbus_power_nb.priority = 0;
677 ret = power_supply_reg_notifier(&data->vbus_power_nb);
678 if (ret) {
679 sun4i_usb_phy_remove(pdev); /* Stop detect work */
680 return ret;
681 }
682 data->vbus_power_nb_registered = true;
683 }
684
Hans de Goeded2332302015-06-13 14:37:45 +0200685 phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate);
686 if (IS_ERR(phy_provider)) {
687 sun4i_usb_phy_remove(pdev); /* Stop detect work */
688 return PTR_ERR(phy_provider);
689 }
690
691 return 0;
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100692}
693
694static const struct of_device_id sun4i_usb_phy_of_match[] = {
695 { .compatible = "allwinner,sun4i-a10-usb-phy" },
696 { .compatible = "allwinner,sun5i-a13-usb-phy" },
Maxime Ripardeadd4312014-05-13 17:44:18 +0200697 { .compatible = "allwinner,sun6i-a31-usb-phy" },
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100698 { .compatible = "allwinner,sun7i-a20-usb-phy" },
Hans de Goede123dfdb2015-06-13 14:37:48 +0200699 { .compatible = "allwinner,sun8i-a23-usb-phy" },
Hans de Goedefc1f45e2015-06-13 14:37:49 +0200700 { .compatible = "allwinner,sun8i-a33-usb-phy" },
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100701 { },
702};
703MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
704
705static struct platform_driver sun4i_usb_phy_driver = {
706 .probe = sun4i_usb_phy_probe,
Hans de Goeded2332302015-06-13 14:37:45 +0200707 .remove = sun4i_usb_phy_remove,
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100708 .driver = {
709 .of_match_table = sun4i_usb_phy_of_match,
710 .name = "sun4i-usb-phy",
Hans de Goedeba4bdc92014-03-01 18:09:26 +0100711 }
712};
713module_platform_driver(sun4i_usb_phy_driver);
714
715MODULE_DESCRIPTION("Allwinner sun4i USB phy driver");
716MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
717MODULE_LICENSE("GPL v2");