1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include <linux/clk.h>
4 #include <linux/err.h>
5 #include <linux/io.h>
6 #include <linux/module.h>
7 #include <linux/of.h>
8 #include <linux/phy/phy.h>
9 #include <linux/platform_device.h>
10 #include <linux/delay.h>
11 #include <linux/regmap.h>
12 #include <linux/mfd/syscon.h>
13 #include <linux/bitfield.h>
14
15 /* USB QSCRATCH Hardware registers */
16 #define QSCRATCH_GENERAL_CFG (0x08)
17 #define HSUSB_PHY_CTRL_REG (0x10)
18
19 /* PHY_CTRL_REG */
20 #define HSUSB_CTRL_DMSEHV_CLAMP BIT(24)
21 #define HSUSB_CTRL_USB2_SUSPEND BIT(23)
22 #define HSUSB_CTRL_UTMI_CLK_EN BIT(21)
23 #define HSUSB_CTRL_UTMI_OTG_VBUS_VALID BIT(20)
24 #define HSUSB_CTRL_USE_CLKCORE BIT(18)
25 #define HSUSB_CTRL_DPSEHV_CLAMP BIT(17)
26 #define HSUSB_CTRL_COMMONONN BIT(11)
27 #define HSUSB_CTRL_ID_HV_CLAMP BIT(9)
28 #define HSUSB_CTRL_OTGSESSVLD_CLAMP BIT(8)
29 #define HSUSB_CTRL_CLAMP_EN BIT(7)
30 #define HSUSB_CTRL_RETENABLEN BIT(1)
31 #define HSUSB_CTRL_POR BIT(0)
32
33 /* QSCRATCH_GENERAL_CFG */
34 #define HSUSB_GCFG_XHCI_REV BIT(2)
35
36 /* USB QSCRATCH Hardware registers */
37 #define SSUSB_PHY_CTRL_REG (0x00)
38 #define SSUSB_PHY_PARAM_CTRL_1 (0x04)
39 #define SSUSB_PHY_PARAM_CTRL_2 (0x08)
40 #define CR_PROTOCOL_DATA_IN_REG (0x0c)
41 #define CR_PROTOCOL_DATA_OUT_REG (0x10)
42 #define CR_PROTOCOL_CAP_ADDR_REG (0x14)
43 #define CR_PROTOCOL_CAP_DATA_REG (0x18)
44 #define CR_PROTOCOL_READ_REG (0x1c)
45 #define CR_PROTOCOL_WRITE_REG (0x20)
46
47 /* PHY_CTRL_REG */
48 #define SSUSB_CTRL_REF_USE_PAD BIT(28)
49 #define SSUSB_CTRL_TEST_POWERDOWN BIT(27)
50 #define SSUSB_CTRL_LANE0_PWR_PRESENT BIT(24)
51 #define SSUSB_CTRL_SS_PHY_EN BIT(8)
52 #define SSUSB_CTRL_SS_PHY_RESET BIT(7)
53
54 /* SSPHY control registers - Does this need 0x30? */
55 #define SSPHY_CTRL_RX_OVRD_IN_HI(lane) (0x1006 + 0x100 * (lane))
56 #define SSPHY_CTRL_TX_OVRD_DRV_LO(lane) (0x1002 + 0x100 * (lane))
57
58 /* SSPHY SoC version specific values */
59 #define SSPHY_RX_EQ_VALUE 4 /* Override value for rx_eq */
60 /* Override value for transmit preemphasis */
61 #define SSPHY_TX_DEEMPH_3_5DB 23
62 /* Override value for mpll */
63 #define SSPHY_MPLL_VALUE 0
64
65 /* QSCRATCH PHY_PARAM_CTRL1 fields */
66 #define PHY_PARAM_CTRL1_TX_FULL_SWING_MASK GENMASK(26, 19)
67 #define PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK GENMASK(19, 13)
68 #define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK GENMASK(13, 7)
69 #define PHY_PARAM_CTRL1_LOS_BIAS_MASK GENMASK(7, 2)
70
71 #define PHY_PARAM_CTRL1_MASK \
72 (PHY_PARAM_CTRL1_TX_FULL_SWING_MASK | \
73 PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK | \
74 PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK | \
75 PHY_PARAM_CTRL1_LOS_BIAS_MASK)
76
77 #define PHY_PARAM_CTRL1_TX_FULL_SWING(x) \
78 FIELD_PREP(PHY_PARAM_CTRL1_TX_FULL_SWING_MASK, (x))
79 #define PHY_PARAM_CTRL1_TX_DEEMPH_6DB(x) \
80 FIELD_PREP(PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK, (x))
81 #define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(x) \
82 FIELD_PREP(PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK, x)
83 #define PHY_PARAM_CTRL1_LOS_BIAS(x) \
84 FIELD_PREP(PHY_PARAM_CTRL1_LOS_BIAS_MASK, (x))
85
86 /* RX OVRD IN HI bits */
87 #define RX_OVRD_IN_HI_RX_RESET_OVRD BIT(13)
88 #define RX_OVRD_IN_HI_RX_RX_RESET BIT(12)
89 #define RX_OVRD_IN_HI_RX_EQ_OVRD BIT(11)
90 #define RX_OVRD_IN_HI_RX_EQ_MASK GENMASK(10, 7)
91 #define RX_OVRD_IN_HI_RX_EQ(x) FIELD_PREP(RX_OVRD_IN_HI_RX_EQ_MASK, (x))
92 #define RX_OVRD_IN_HI_RX_EQ_EN_OVRD BIT(7)
93 #define RX_OVRD_IN_HI_RX_EQ_EN BIT(6)
94 #define RX_OVRD_IN_HI_RX_LOS_FILTER_OVRD BIT(5)
95 #define RX_OVRD_IN_HI_RX_LOS_FILTER_MASK GENMASK(4, 2)
96 #define RX_OVRD_IN_HI_RX_RATE_OVRD BIT(2)
97 #define RX_OVRD_IN_HI_RX_RATE_MASK GENMASK(2, 0)
98
99 /* TX OVRD DRV LO register bits */
100 #define TX_OVRD_DRV_LO_AMPLITUDE_MASK GENMASK(6, 0)
101 #define TX_OVRD_DRV_LO_PREEMPH_MASK GENMASK(13, 6)
102 #define TX_OVRD_DRV_LO_PREEMPH(x) ((x) << 7)
103 #define TX_OVRD_DRV_LO_EN BIT(14)
104
105 /* MPLL bits */
106 #define SSPHY_MPLL_MASK GENMASK(8, 5)
107 #define SSPHY_MPLL(x) ((x) << 5)
108
109 /* SS CAP register bits */
110 #define SS_CR_CAP_ADDR_REG BIT(0)
111 #define SS_CR_CAP_DATA_REG BIT(0)
112 #define SS_CR_READ_REG BIT(0)
113 #define SS_CR_WRITE_REG BIT(0)
114
115 #define LATCH_SLEEP 40
116 #define LATCH_TIMEOUT 100
117
118 struct usb_phy {
119 void __iomem *base;
120 struct device *dev;
121 struct clk *xo_clk;
122 struct clk *ref_clk;
123 u32 rx_eq;
124 u32 tx_deamp_3_5db;
125 u32 mpll;
126 };
127
128 struct phy_drvdata {
129 struct phy_ops ops;
130 u32 clk_rate;
131 };
132
133 /**
134 * usb_phy_write_readback() - Write register and read back masked value to
135 * confirm it is written
136 *
137 * @phy_dwc3: QCOM DWC3 phy context
138 * @offset: register offset.
139 * @mask: register bitmask specifying what should be updated
140 * @val: value to write.
141 */
usb_phy_write_readback(struct usb_phy * phy_dwc3,u32 offset,const u32 mask,u32 val)142 static inline void usb_phy_write_readback(struct usb_phy *phy_dwc3,
143 u32 offset,
144 const u32 mask, u32 val)
145 {
146 u32 write_val, tmp = readl(phy_dwc3->base + offset);
147
148 tmp &= ~mask; /* retain other bits */
149 write_val = tmp | val;
150
151 writel(write_val, phy_dwc3->base + offset);
152
153 /* Read back to see if val was written */
154 tmp = readl(phy_dwc3->base + offset);
155 tmp &= mask; /* clear other bits */
156
157 if (tmp != val)
158 dev_err(phy_dwc3->dev, "write: %x to QSCRATCH: %x FAILED\n", val, offset);
159 }
160
wait_for_latch(void __iomem * addr)161 static int wait_for_latch(void __iomem *addr)
162 {
163 u32 val;
164
165 return readl_poll_timeout(addr, val, !val, LATCH_SLEEP, LATCH_TIMEOUT);
166 }
167
168 /**
169 * usb_ss_write_phycreg() - Write SSPHY register
170 *
171 * @phy_dwc3: QCOM DWC3 phy context
172 * @addr: SSPHY address to write.
173 * @val: value to write.
174 */
usb_ss_write_phycreg(struct usb_phy * phy_dwc3,u32 addr,u32 val)175 static int usb_ss_write_phycreg(struct usb_phy *phy_dwc3,
176 u32 addr, u32 val)
177 {
178 int ret;
179
180 writel(addr, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG);
181 writel(SS_CR_CAP_ADDR_REG,
182 phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
183
184 ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
185 if (ret)
186 goto err_wait;
187
188 writel(val, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG);
189 writel(SS_CR_CAP_DATA_REG,
190 phy_dwc3->base + CR_PROTOCOL_CAP_DATA_REG);
191
192 ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_DATA_REG);
193 if (ret)
194 goto err_wait;
195
196 writel(SS_CR_WRITE_REG, phy_dwc3->base + CR_PROTOCOL_WRITE_REG);
197
198 ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_WRITE_REG);
199
200 err_wait:
201 if (ret)
202 dev_err(phy_dwc3->dev, "timeout waiting for latch\n");
203 return ret;
204 }
205
206 /**
207 * usb_ss_read_phycreg() - Read SSPHY register.
208 *
209 * @phy_dwc3: QCOM DWC3 phy context
210 * @addr: SSPHY address to read.
211 * @val: pointer in which read is store.
212 */
usb_ss_read_phycreg(struct usb_phy * phy_dwc3,u32 addr,u32 * val)213 static int usb_ss_read_phycreg(struct usb_phy *phy_dwc3,
214 u32 addr, u32 *val)
215 {
216 int ret;
217
218 writel(addr, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG);
219 writel(SS_CR_CAP_ADDR_REG,
220 phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
221
222 ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
223 if (ret)
224 goto err_wait;
225
226 /*
227 * Due to hardware bug, first read of SSPHY register might be
228 * incorrect. Hence as workaround, SW should perform SSPHY register
229 * read twice, but use only second read and ignore first read.
230 */
231 writel(SS_CR_READ_REG, phy_dwc3->base + CR_PROTOCOL_READ_REG);
232
233 ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_READ_REG);
234 if (ret)
235 goto err_wait;
236
237 /* throwaway read */
238 readl(phy_dwc3->base + CR_PROTOCOL_DATA_OUT_REG);
239
240 writel(SS_CR_READ_REG, phy_dwc3->base + CR_PROTOCOL_READ_REG);
241
242 ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_READ_REG);
243 if (ret)
244 goto err_wait;
245
246 *val = readl(phy_dwc3->base + CR_PROTOCOL_DATA_OUT_REG);
247
248 err_wait:
249 return ret;
250 }
251
qcom_ipq806x_usb_hs_phy_init(struct phy * phy)252 static int qcom_ipq806x_usb_hs_phy_init(struct phy *phy)
253 {
254 struct usb_phy *phy_dwc3 = phy_get_drvdata(phy);
255 int ret;
256 u32 val;
257
258 ret = clk_prepare_enable(phy_dwc3->xo_clk);
259 if (ret)
260 return ret;
261
262 ret = clk_prepare_enable(phy_dwc3->ref_clk);
263 if (ret) {
264 clk_disable_unprepare(phy_dwc3->xo_clk);
265 return ret;
266 }
267
268 /*
269 * HSPHY Initialization: Enable UTMI clock, select 19.2MHz fsel
270 * enable clamping, and disable RETENTION (power-on default is ENABLED)
271 */
272 val = HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_DMSEHV_CLAMP |
273 HSUSB_CTRL_RETENABLEN | HSUSB_CTRL_COMMONONN |
274 HSUSB_CTRL_OTGSESSVLD_CLAMP | HSUSB_CTRL_ID_HV_CLAMP |
275 HSUSB_CTRL_UTMI_OTG_VBUS_VALID | HSUSB_CTRL_UTMI_CLK_EN |
276 HSUSB_CTRL_CLAMP_EN | 0x70;
277
278 /* use core clock if external reference is not present */
279 if (!phy_dwc3->xo_clk)
280 val |= HSUSB_CTRL_USE_CLKCORE;
281
282 writel(val, phy_dwc3->base + HSUSB_PHY_CTRL_REG);
283 usleep_range(2000, 2200);
284
285 /* Disable (bypass) VBUS and ID filters */
286 writel(HSUSB_GCFG_XHCI_REV, phy_dwc3->base + QSCRATCH_GENERAL_CFG);
287
288 return 0;
289 }
290
qcom_ipq806x_usb_hs_phy_exit(struct phy * phy)291 static int qcom_ipq806x_usb_hs_phy_exit(struct phy *phy)
292 {
293 struct usb_phy *phy_dwc3 = phy_get_drvdata(phy);
294
295 clk_disable_unprepare(phy_dwc3->ref_clk);
296 clk_disable_unprepare(phy_dwc3->xo_clk);
297
298 return 0;
299 }
300
qcom_ipq806x_usb_ss_phy_init(struct phy * phy)301 static int qcom_ipq806x_usb_ss_phy_init(struct phy *phy)
302 {
303 struct usb_phy *phy_dwc3 = phy_get_drvdata(phy);
304 int ret;
305 u32 data;
306
307 ret = clk_prepare_enable(phy_dwc3->xo_clk);
308 if (ret)
309 return ret;
310
311 ret = clk_prepare_enable(phy_dwc3->ref_clk);
312 if (ret) {
313 clk_disable_unprepare(phy_dwc3->xo_clk);
314 return ret;
315 }
316
317 /* reset phy */
318 data = readl(phy_dwc3->base + SSUSB_PHY_CTRL_REG);
319 writel(data | SSUSB_CTRL_SS_PHY_RESET,
320 phy_dwc3->base + SSUSB_PHY_CTRL_REG);
321 usleep_range(2000, 2200);
322 writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
323
324 /* clear REF_PAD if we don't have XO clk */
325 if (!phy_dwc3->xo_clk)
326 data &= ~SSUSB_CTRL_REF_USE_PAD;
327 else
328 data |= SSUSB_CTRL_REF_USE_PAD;
329
330 writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
331
332 /* wait for ref clk to become stable, this can take up to 30ms */
333 msleep(30);
334
335 data |= SSUSB_CTRL_SS_PHY_EN | SSUSB_CTRL_LANE0_PWR_PRESENT;
336 writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
337
338 /*
339 * WORKAROUND: There is SSPHY suspend bug due to which USB enumerates
340 * in HS mode instead of SS mode. Workaround it by asserting
341 * LANE0.TX_ALT_BLOCK.EN_ALT_BUS to enable TX to use alt bus mode
342 */
343 ret = usb_ss_read_phycreg(phy_dwc3, 0x102D, &data);
344 if (ret)
345 goto err_phy_trans;
346
347 data |= (1 << 7);
348 ret = usb_ss_write_phycreg(phy_dwc3, 0x102D, data);
349 if (ret)
350 goto err_phy_trans;
351
352 ret = usb_ss_read_phycreg(phy_dwc3, 0x1010, &data);
353 if (ret)
354 goto err_phy_trans;
355
356 data &= ~0xff0;
357 data |= 0x20;
358 ret = usb_ss_write_phycreg(phy_dwc3, 0x1010, data);
359 if (ret)
360 goto err_phy_trans;
361
362 /*
363 * Fix RX Equalization setting as follows
364 * LANE0.RX_OVRD_IN_HI. RX_EQ_EN set to 0
365 * LANE0.RX_OVRD_IN_HI.RX_EQ_EN_OVRD set to 1
366 * LANE0.RX_OVRD_IN_HI.RX_EQ set based on SoC version
367 * LANE0.RX_OVRD_IN_HI.RX_EQ_OVRD set to 1
368 */
369 ret = usb_ss_read_phycreg(phy_dwc3, SSPHY_CTRL_RX_OVRD_IN_HI(0), &data);
370 if (ret)
371 goto err_phy_trans;
372
373 data &= ~RX_OVRD_IN_HI_RX_EQ_EN;
374 data |= RX_OVRD_IN_HI_RX_EQ_EN_OVRD;
375 data &= ~RX_OVRD_IN_HI_RX_EQ_MASK;
376 data |= RX_OVRD_IN_HI_RX_EQ(phy_dwc3->rx_eq);
377 data |= RX_OVRD_IN_HI_RX_EQ_OVRD;
378 ret = usb_ss_write_phycreg(phy_dwc3,
379 SSPHY_CTRL_RX_OVRD_IN_HI(0), data);
380 if (ret)
381 goto err_phy_trans;
382
383 /*
384 * Set EQ and TX launch amplitudes as follows
385 * LANE0.TX_OVRD_DRV_LO.PREEMPH set based on SoC version
386 * LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 110
387 * LANE0.TX_OVRD_DRV_LO.EN set to 1.
388 */
389 ret = usb_ss_read_phycreg(phy_dwc3,
390 SSPHY_CTRL_TX_OVRD_DRV_LO(0), &data);
391 if (ret)
392 goto err_phy_trans;
393
394 data &= ~TX_OVRD_DRV_LO_PREEMPH_MASK;
395 data |= TX_OVRD_DRV_LO_PREEMPH(phy_dwc3->tx_deamp_3_5db);
396 data &= ~TX_OVRD_DRV_LO_AMPLITUDE_MASK;
397 data |= 0x6E;
398 data |= TX_OVRD_DRV_LO_EN;
399 ret = usb_ss_write_phycreg(phy_dwc3,
400 SSPHY_CTRL_TX_OVRD_DRV_LO(0), data);
401 if (ret)
402 goto err_phy_trans;
403
404 data = 0;
405 data &= ~SSPHY_MPLL_MASK;
406 data |= SSPHY_MPLL(phy_dwc3->mpll);
407 usb_ss_write_phycreg(phy_dwc3, 0x30, data);
408
409 /*
410 * Set the QSCRATCH PHY_PARAM_CTRL1 parameters as follows
411 * TX_FULL_SWING [26:20] amplitude to 110
412 * TX_DEEMPH_6DB [19:14] to 32
413 * TX_DEEMPH_3_5DB [13:8] set based on SoC version
414 * LOS_BIAS [7:3] to 9
415 */
416 data = readl(phy_dwc3->base + SSUSB_PHY_PARAM_CTRL_1);
417
418 data &= ~PHY_PARAM_CTRL1_MASK;
419
420 data |= PHY_PARAM_CTRL1_TX_FULL_SWING(0x6e) |
421 PHY_PARAM_CTRL1_TX_DEEMPH_6DB(0x20) |
422 PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(phy_dwc3->tx_deamp_3_5db) |
423 PHY_PARAM_CTRL1_LOS_BIAS(0x9);
424
425 usb_phy_write_readback(phy_dwc3, SSUSB_PHY_PARAM_CTRL_1,
426 PHY_PARAM_CTRL1_MASK, data);
427
428 err_phy_trans:
429 return ret;
430 }
431
qcom_ipq806x_usb_ss_phy_exit(struct phy * phy)432 static int qcom_ipq806x_usb_ss_phy_exit(struct phy *phy)
433 {
434 struct usb_phy *phy_dwc3 = phy_get_drvdata(phy);
435
436 /* Sequence to put SSPHY in low power state:
437 * 1. Clear REF_PHY_EN in PHY_CTRL_REG
438 * 2. Clear REF_USE_PAD in PHY_CTRL_REG
439 * 3. Set TEST_POWERED_DOWN in PHY_CTRL_REG to enable PHY retention
440 */
441 usb_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
442 SSUSB_CTRL_SS_PHY_EN, 0x0);
443 usb_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
444 SSUSB_CTRL_REF_USE_PAD, 0x0);
445 usb_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
446 SSUSB_CTRL_TEST_POWERDOWN, 0x0);
447
448 clk_disable_unprepare(phy_dwc3->ref_clk);
449 clk_disable_unprepare(phy_dwc3->xo_clk);
450
451 return 0;
452 }
453
454 static const struct phy_drvdata qcom_ipq806x_usb_hs_drvdata = {
455 .ops = {
456 .init = qcom_ipq806x_usb_hs_phy_init,
457 .exit = qcom_ipq806x_usb_hs_phy_exit,
458 .owner = THIS_MODULE,
459 },
460 .clk_rate = 60000000,
461 };
462
463 static const struct phy_drvdata qcom_ipq806x_usb_ss_drvdata = {
464 .ops = {
465 .init = qcom_ipq806x_usb_ss_phy_init,
466 .exit = qcom_ipq806x_usb_ss_phy_exit,
467 .owner = THIS_MODULE,
468 },
469 .clk_rate = 125000000,
470 };
471
472 static const struct of_device_id qcom_ipq806x_usb_phy_table[] = {
473 { .compatible = "qcom,ipq806x-usb-phy-hs",
474 .data = &qcom_ipq806x_usb_hs_drvdata },
475 { .compatible = "qcom,ipq806x-usb-phy-ss",
476 .data = &qcom_ipq806x_usb_ss_drvdata },
477 { /* Sentinel */ }
478 };
479 MODULE_DEVICE_TABLE(of, qcom_ipq806x_usb_phy_table);
480
qcom_ipq806x_usb_phy_probe(struct platform_device * pdev)481 static int qcom_ipq806x_usb_phy_probe(struct platform_device *pdev)
482 {
483 struct resource *res;
484 resource_size_t size;
485 struct phy *generic_phy;
486 struct usb_phy *phy_dwc3;
487 const struct phy_drvdata *data;
488 struct phy_provider *phy_provider;
489
490 phy_dwc3 = devm_kzalloc(&pdev->dev, sizeof(*phy_dwc3), GFP_KERNEL);
491 if (!phy_dwc3)
492 return -ENOMEM;
493
494 data = of_device_get_match_data(&pdev->dev);
495
496 phy_dwc3->dev = &pdev->dev;
497
498 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
499 if (!res)
500 return -EINVAL;
501 size = resource_size(res);
502 phy_dwc3->base = devm_ioremap(phy_dwc3->dev, res->start, size);
503
504 if (!phy_dwc3->base) {
505 dev_err(phy_dwc3->dev, "failed to map reg\n");
506 return -ENOMEM;
507 }
508
509 phy_dwc3->ref_clk = devm_clk_get(phy_dwc3->dev, "ref");
510 if (IS_ERR(phy_dwc3->ref_clk)) {
511 dev_dbg(phy_dwc3->dev, "cannot get reference clock\n");
512 return PTR_ERR(phy_dwc3->ref_clk);
513 }
514
515 clk_set_rate(phy_dwc3->ref_clk, data->clk_rate);
516
517 phy_dwc3->xo_clk = devm_clk_get(phy_dwc3->dev, "xo");
518 if (IS_ERR(phy_dwc3->xo_clk)) {
519 dev_dbg(phy_dwc3->dev, "cannot get TCXO clock\n");
520 phy_dwc3->xo_clk = NULL;
521 }
522
523 /* Parse device node to probe HSIO settings */
524 if (device_property_read_u32(&pdev->dev, "qcom,rx-eq",
525 &phy_dwc3->rx_eq))
526 phy_dwc3->rx_eq = SSPHY_RX_EQ_VALUE;
527
528 if (device_property_read_u32(&pdev->dev, "qcom,tx-deamp_3_5db",
529 &phy_dwc3->tx_deamp_3_5db))
530 phy_dwc3->tx_deamp_3_5db = SSPHY_TX_DEEMPH_3_5DB;
531
532 if (device_property_read_u32(&pdev->dev, "qcom,mpll", &phy_dwc3->mpll))
533 phy_dwc3->mpll = SSPHY_MPLL_VALUE;
534
535 generic_phy = devm_phy_create(phy_dwc3->dev, pdev->dev.of_node, &data->ops);
536
537 if (IS_ERR(generic_phy))
538 return PTR_ERR(generic_phy);
539
540 phy_set_drvdata(generic_phy, phy_dwc3);
541 platform_set_drvdata(pdev, phy_dwc3);
542
543 phy_provider = devm_of_phy_provider_register(phy_dwc3->dev,
544 of_phy_simple_xlate);
545
546 if (IS_ERR(phy_provider))
547 return PTR_ERR(phy_provider);
548
549 return 0;
550 }
551
552 static struct platform_driver qcom_ipq806x_usb_phy_driver = {
553 .probe = qcom_ipq806x_usb_phy_probe,
554 .driver = {
555 .name = "qcom-ipq806x-usb-phy",
556 .of_match_table = qcom_ipq806x_usb_phy_table,
557 },
558 };
559
560 module_platform_driver(qcom_ipq806x_usb_phy_driver);
561
562 MODULE_ALIAS("platform:phy-qcom-ipq806x-usb");
563 MODULE_LICENSE("GPL v2");
564 MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
565 MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
566 MODULE_DESCRIPTION("DesignWare USB3 QCOM PHY driver");
567