1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
4 */
5
6 #include <linux/clk.h>
7 #include <linux/delay.h>
8 #include <linux/err.h>
9 #include <linux/io.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/phy/phy.h>
14 #include <linux/platform_device.h>
15 #include <linux/regmap.h>
16 #include <linux/regulator/consumer.h>
17 #include <linux/reset.h>
18 #include <linux/slab.h>
19
20 #define USB2_PHY_USB_PHY_UTMI_CTRL0 (0x3c)
21 #define SLEEPM BIT(0)
22 #define OPMODE_MASK GENMASK(4, 3)
23 #define OPMODE_NORMAL (0x00)
24 #define OPMODE_NONDRIVING BIT(3)
25 #define TERMSEL BIT(5)
26
27 #define USB2_PHY_USB_PHY_UTMI_CTRL1 (0x40)
28 #define XCVRSEL BIT(0)
29
30 #define USB2_PHY_USB_PHY_UTMI_CTRL5 (0x50)
31 #define POR BIT(1)
32
33 #define USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0 (0x54)
34 #define SIDDQ BIT(2)
35 #define RETENABLEN BIT(3)
36 #define FSEL_MASK GENMASK(6, 4)
37 #define FSEL_DEFAULT (0x3 << 4)
38
39 #define USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1 (0x58)
40 #define VBUSVLDEXTSEL0 BIT(4)
41 #define PLLBTUNE BIT(5)
42
43 #define USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2 (0x5c)
44 #define VREGBYPASS BIT(0)
45
46 #define USB2_PHY_USB_PHY_HS_PHY_CTRL1 (0x60)
47 #define VBUSVLDEXT0 BIT(0)
48
49 #define USB2_PHY_USB_PHY_HS_PHY_CTRL2 (0x64)
50 #define USB2_AUTO_RESUME BIT(0)
51 #define USB2_SUSPEND_N BIT(2)
52 #define USB2_SUSPEND_N_SEL BIT(3)
53
54 #define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0 (0x6c)
55 #define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1 (0x70)
56 #define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2 (0x74)
57 #define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3 (0x78)
58 #define PARAM_OVRD_MASK 0xFF
59
60 #define USB2_PHY_USB_PHY_CFG0 (0x94)
61 #define UTMI_PHY_DATAPATH_CTRL_OVERRIDE_EN BIT(0)
62 #define UTMI_PHY_CMN_CTRL_OVERRIDE_EN BIT(1)
63
64 #define USB2_PHY_USB_PHY_REFCLK_CTRL (0xa0)
65 #define REFCLK_SEL_MASK GENMASK(1, 0)
66 #define REFCLK_SEL_DEFAULT (0x2 << 0)
67
68 #define HS_DISCONNECT_MASK GENMASK(2, 0)
69 #define SQUELCH_DETECTOR_MASK GENMASK(7, 5)
70
71 #define HS_AMPLITUDE_MASK GENMASK(3, 0)
72 #define PREEMPHASIS_DURATION_MASK BIT(5)
73 #define PREEMPHASIS_AMPLITUDE_MASK GENMASK(7, 6)
74
75 #define HS_RISE_FALL_MASK GENMASK(1, 0)
76 #define HS_CROSSOVER_VOLTAGE_MASK GENMASK(3, 2)
77 #define HS_OUTPUT_IMPEDANCE_MASK GENMASK(5, 4)
78
79 #define LS_FS_OUTPUT_IMPEDANCE_MASK GENMASK(3, 0)
80
81 static const char * const qcom_snps_hsphy_vreg_names[] = {
82 "vdda-pll", "vdda33", "vdda18",
83 };
84
85 #define SNPS_HS_NUM_VREGS ARRAY_SIZE(qcom_snps_hsphy_vreg_names)
86
87 struct override_param {
88 s32 value;
89 u8 reg_val;
90 };
91
92 struct override_param_map {
93 const char *prop_name;
94 const struct override_param *param_table;
95 u8 table_size;
96 u8 reg_offset;
97 u8 param_mask;
98 };
99
100 struct phy_override_seq {
101 bool need_update;
102 u8 offset;
103 u8 value;
104 u8 mask;
105 };
106
107 #define NUM_HSPHY_TUNING_PARAMS (9)
108
109 /**
110 * struct qcom_snps_hsphy - snps hs phy attributes
111 *
112 * @dev: device structure
113 *
114 * @phy: generic phy
115 * @base: iomapped memory space for snps hs phy
116 *
117 * @num_clks: number of clocks
118 * @clks: array of clocks
119 * @phy_reset: phy reset control
120 * @vregs: regulator supplies bulk data
121 * @phy_initialized: if PHY has been initialized correctly
122 * @mode: contains the current mode the PHY is in
123 * @update_seq_cfg: tuning parameters for phy init
124 */
125 struct qcom_snps_hsphy {
126 struct device *dev;
127
128 struct phy *phy;
129 void __iomem *base;
130
131 int num_clks;
132 struct clk_bulk_data *clks;
133 struct reset_control *phy_reset;
134 struct regulator_bulk_data vregs[SNPS_HS_NUM_VREGS];
135
136 bool phy_initialized;
137 enum phy_mode mode;
138 struct phy_override_seq update_seq_cfg[NUM_HSPHY_TUNING_PARAMS];
139 };
140
qcom_snps_hsphy_clk_init(struct qcom_snps_hsphy * hsphy)141 static int qcom_snps_hsphy_clk_init(struct qcom_snps_hsphy *hsphy)
142 {
143 struct device *dev = hsphy->dev;
144
145 hsphy->num_clks = 2;
146 hsphy->clks = devm_kcalloc(dev, hsphy->num_clks, sizeof(*hsphy->clks), GFP_KERNEL);
147 if (!hsphy->clks)
148 return -ENOMEM;
149
150 /*
151 * TODO: Currently no device tree instantiation of the PHY is using the clock.
152 * This needs to be fixed in order for this code to be able to use devm_clk_bulk_get().
153 */
154 hsphy->clks[0].id = "cfg_ahb";
155 hsphy->clks[0].clk = devm_clk_get_optional(dev, "cfg_ahb");
156 if (IS_ERR(hsphy->clks[0].clk))
157 return dev_err_probe(dev, PTR_ERR(hsphy->clks[0].clk),
158 "failed to get cfg_ahb clk\n");
159
160 hsphy->clks[1].id = "ref";
161 hsphy->clks[1].clk = devm_clk_get(dev, "ref");
162 if (IS_ERR(hsphy->clks[1].clk))
163 return dev_err_probe(dev, PTR_ERR(hsphy->clks[1].clk),
164 "failed to get ref clk\n");
165
166 return 0;
167 }
168
qcom_snps_hsphy_write_mask(void __iomem * base,u32 offset,u32 mask,u32 val)169 static inline void qcom_snps_hsphy_write_mask(void __iomem *base, u32 offset,
170 u32 mask, u32 val)
171 {
172 u32 reg;
173
174 reg = readl_relaxed(base + offset);
175 reg &= ~mask;
176 reg |= val & mask;
177 writel_relaxed(reg, base + offset);
178
179 /* Ensure above write is completed */
180 readl_relaxed(base + offset);
181 }
182
qcom_snps_hsphy_suspend(struct qcom_snps_hsphy * hsphy)183 static int qcom_snps_hsphy_suspend(struct qcom_snps_hsphy *hsphy)
184 {
185 dev_dbg(&hsphy->phy->dev, "Suspend QCOM SNPS PHY\n");
186
187 if (hsphy->mode == PHY_MODE_USB_HOST) {
188 /* Enable auto-resume to meet remote wakeup timing */
189 qcom_snps_hsphy_write_mask(hsphy->base,
190 USB2_PHY_USB_PHY_HS_PHY_CTRL2,
191 USB2_AUTO_RESUME,
192 USB2_AUTO_RESUME);
193 usleep_range(500, 1000);
194 qcom_snps_hsphy_write_mask(hsphy->base,
195 USB2_PHY_USB_PHY_HS_PHY_CTRL2,
196 0, USB2_AUTO_RESUME);
197 }
198
199 return 0;
200 }
201
qcom_snps_hsphy_resume(struct qcom_snps_hsphy * hsphy)202 static int qcom_snps_hsphy_resume(struct qcom_snps_hsphy *hsphy)
203 {
204 dev_dbg(&hsphy->phy->dev, "Resume QCOM SNPS PHY, mode\n");
205
206 return 0;
207 }
208
qcom_snps_hsphy_runtime_suspend(struct device * dev)209 static int __maybe_unused qcom_snps_hsphy_runtime_suspend(struct device *dev)
210 {
211 struct qcom_snps_hsphy *hsphy = dev_get_drvdata(dev);
212
213 if (!hsphy->phy_initialized)
214 return 0;
215
216 return qcom_snps_hsphy_suspend(hsphy);
217 }
218
qcom_snps_hsphy_runtime_resume(struct device * dev)219 static int __maybe_unused qcom_snps_hsphy_runtime_resume(struct device *dev)
220 {
221 struct qcom_snps_hsphy *hsphy = dev_get_drvdata(dev);
222
223 if (!hsphy->phy_initialized)
224 return 0;
225
226 return qcom_snps_hsphy_resume(hsphy);
227 }
228
qcom_snps_hsphy_set_mode(struct phy * phy,enum phy_mode mode,int submode)229 static int qcom_snps_hsphy_set_mode(struct phy *phy, enum phy_mode mode,
230 int submode)
231 {
232 struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy);
233
234 hsphy->mode = mode;
235 return 0;
236 }
237
238 static const struct override_param hs_disconnect_sc7280[] = {
239 { -272, 0 },
240 { 0, 1 },
241 { 317, 2 },
242 { 630, 3 },
243 { 973, 4 },
244 { 1332, 5 },
245 { 1743, 6 },
246 { 2156, 7 },
247 };
248
249 static const struct override_param squelch_det_threshold_sc7280[] = {
250 { -2090, 7 },
251 { -1560, 6 },
252 { -1030, 5 },
253 { -530, 4 },
254 { 0, 3 },
255 { 530, 2 },
256 { 1060, 1 },
257 { 1590, 0 },
258 };
259
260 static const struct override_param hs_amplitude_sc7280[] = {
261 { -660, 0 },
262 { -440, 1 },
263 { -220, 2 },
264 { 0, 3 },
265 { 230, 4 },
266 { 440, 5 },
267 { 650, 6 },
268 { 890, 7 },
269 { 1110, 8 },
270 { 1330, 9 },
271 { 1560, 10 },
272 { 1780, 11 },
273 { 2000, 12 },
274 { 2220, 13 },
275 { 2430, 14 },
276 { 2670, 15 },
277 };
278
279 static const struct override_param preemphasis_duration_sc7280[] = {
280 { 10000, 1 },
281 { 20000, 0 },
282 };
283
284 static const struct override_param preemphasis_amplitude_sc7280[] = {
285 { 10000, 1 },
286 { 20000, 2 },
287 { 30000, 3 },
288 { 40000, 0 },
289 };
290
291 static const struct override_param hs_rise_fall_time_sc7280[] = {
292 { -4100, 3 },
293 { 0, 2 },
294 { 2810, 1 },
295 { 5430, 0 },
296 };
297
298 static const struct override_param hs_crossover_voltage_sc7280[] = {
299 { -31000, 1 },
300 { 0, 3 },
301 { 28000, 2 },
302 };
303
304 static const struct override_param hs_output_impedance_sc7280[] = {
305 { -2300000, 3 },
306 { 0, 2 },
307 { 2600000, 1 },
308 { 6100000, 0 },
309 };
310
311 static const struct override_param ls_fs_output_impedance_sc7280[] = {
312 { -1053, 15 },
313 { -557, 7 },
314 { 0, 3 },
315 { 612, 1 },
316 { 1310, 0 },
317 };
318
319 static const struct override_param_map sc7280_snps_7nm_phy[] = {
320 {
321 "qcom,hs-disconnect-bp",
322 hs_disconnect_sc7280,
323 ARRAY_SIZE(hs_disconnect_sc7280),
324 USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0,
325 HS_DISCONNECT_MASK
326 },
327 {
328 "qcom,squelch-detector-bp",
329 squelch_det_threshold_sc7280,
330 ARRAY_SIZE(squelch_det_threshold_sc7280),
331 USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0,
332 SQUELCH_DETECTOR_MASK
333 },
334 {
335 "qcom,hs-amplitude-bp",
336 hs_amplitude_sc7280,
337 ARRAY_SIZE(hs_amplitude_sc7280),
338 USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
339 HS_AMPLITUDE_MASK
340 },
341 {
342 "qcom,pre-emphasis-duration-bp",
343 preemphasis_duration_sc7280,
344 ARRAY_SIZE(preemphasis_duration_sc7280),
345 USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
346 PREEMPHASIS_DURATION_MASK,
347 },
348 {
349 "qcom,pre-emphasis-amplitude-bp",
350 preemphasis_amplitude_sc7280,
351 ARRAY_SIZE(preemphasis_amplitude_sc7280),
352 USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
353 PREEMPHASIS_AMPLITUDE_MASK,
354 },
355 {
356 "qcom,hs-rise-fall-time-bp",
357 hs_rise_fall_time_sc7280,
358 ARRAY_SIZE(hs_rise_fall_time_sc7280),
359 USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
360 HS_RISE_FALL_MASK
361 },
362 {
363 "qcom,hs-crossover-voltage-microvolt",
364 hs_crossover_voltage_sc7280,
365 ARRAY_SIZE(hs_crossover_voltage_sc7280),
366 USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
367 HS_CROSSOVER_VOLTAGE_MASK
368 },
369 {
370 "qcom,hs-output-impedance-micro-ohms",
371 hs_output_impedance_sc7280,
372 ARRAY_SIZE(hs_output_impedance_sc7280),
373 USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
374 HS_OUTPUT_IMPEDANCE_MASK,
375 },
376 {
377 "qcom,ls-fs-output-impedance-bp",
378 ls_fs_output_impedance_sc7280,
379 ARRAY_SIZE(ls_fs_output_impedance_sc7280),
380 USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3,
381 LS_FS_OUTPUT_IMPEDANCE_MASK,
382 },
383 {},
384 };
385
qcom_snps_hsphy_init(struct phy * phy)386 static int qcom_snps_hsphy_init(struct phy *phy)
387 {
388 struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy);
389 int ret, i;
390
391 dev_vdbg(&phy->dev, "%s(): Initializing SNPS HS phy\n", __func__);
392
393 ret = regulator_bulk_enable(ARRAY_SIZE(hsphy->vregs), hsphy->vregs);
394 if (ret)
395 return ret;
396
397 ret = clk_bulk_prepare_enable(hsphy->num_clks, hsphy->clks);
398 if (ret) {
399 dev_err(&phy->dev, "failed to enable clocks, %d\n", ret);
400 goto poweroff_phy;
401 }
402
403 ret = reset_control_assert(hsphy->phy_reset);
404 if (ret) {
405 dev_err(&phy->dev, "failed to assert phy_reset, %d\n", ret);
406 goto disable_clks;
407 }
408
409 usleep_range(100, 150);
410
411 ret = reset_control_deassert(hsphy->phy_reset);
412 if (ret) {
413 dev_err(&phy->dev, "failed to de-assert phy_reset, %d\n", ret);
414 goto disable_clks;
415 }
416
417 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_CFG0,
418 UTMI_PHY_CMN_CTRL_OVERRIDE_EN,
419 UTMI_PHY_CMN_CTRL_OVERRIDE_EN);
420 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_UTMI_CTRL5,
421 POR, POR);
422 qcom_snps_hsphy_write_mask(hsphy->base,
423 USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0,
424 FSEL_MASK, 0);
425 qcom_snps_hsphy_write_mask(hsphy->base,
426 USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1,
427 PLLBTUNE, PLLBTUNE);
428 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_REFCLK_CTRL,
429 REFCLK_SEL_DEFAULT, REFCLK_SEL_MASK);
430 qcom_snps_hsphy_write_mask(hsphy->base,
431 USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1,
432 VBUSVLDEXTSEL0, VBUSVLDEXTSEL0);
433 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL1,
434 VBUSVLDEXT0, VBUSVLDEXT0);
435
436 for (i = 0; i < ARRAY_SIZE(hsphy->update_seq_cfg); i++) {
437 if (hsphy->update_seq_cfg[i].need_update)
438 qcom_snps_hsphy_write_mask(hsphy->base,
439 hsphy->update_seq_cfg[i].offset,
440 hsphy->update_seq_cfg[i].mask,
441 hsphy->update_seq_cfg[i].value);
442 }
443
444 qcom_snps_hsphy_write_mask(hsphy->base,
445 USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2,
446 VREGBYPASS, VREGBYPASS);
447
448 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL2,
449 USB2_SUSPEND_N_SEL | USB2_SUSPEND_N,
450 USB2_SUSPEND_N_SEL | USB2_SUSPEND_N);
451
452 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_UTMI_CTRL0,
453 SLEEPM, SLEEPM);
454
455 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0,
456 SIDDQ, 0);
457
458 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_UTMI_CTRL5,
459 POR, 0);
460
461 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL2,
462 USB2_SUSPEND_N_SEL, 0);
463
464 qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_CFG0,
465 UTMI_PHY_CMN_CTRL_OVERRIDE_EN, 0);
466
467 hsphy->phy_initialized = true;
468
469 return 0;
470
471 disable_clks:
472 clk_bulk_disable_unprepare(hsphy->num_clks, hsphy->clks);
473 poweroff_phy:
474 regulator_bulk_disable(ARRAY_SIZE(hsphy->vregs), hsphy->vregs);
475
476 return ret;
477 }
478
qcom_snps_hsphy_exit(struct phy * phy)479 static int qcom_snps_hsphy_exit(struct phy *phy)
480 {
481 struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy);
482
483 reset_control_assert(hsphy->phy_reset);
484 clk_bulk_disable_unprepare(hsphy->num_clks, hsphy->clks);
485 regulator_bulk_disable(ARRAY_SIZE(hsphy->vregs), hsphy->vregs);
486 hsphy->phy_initialized = false;
487
488 return 0;
489 }
490
491 static const struct phy_ops qcom_snps_hsphy_gen_ops = {
492 .init = qcom_snps_hsphy_init,
493 .exit = qcom_snps_hsphy_exit,
494 .set_mode = qcom_snps_hsphy_set_mode,
495 .owner = THIS_MODULE,
496 };
497
498 static const struct of_device_id qcom_snps_hsphy_of_match_table[] = {
499 { .compatible = "qcom,sm8150-usb-hs-phy", },
500 { .compatible = "qcom,usb-snps-hs-5nm-phy", },
501 {
502 .compatible = "qcom,usb-snps-hs-7nm-phy",
503 .data = &sc7280_snps_7nm_phy,
504 },
505 { .compatible = "qcom,usb-snps-femto-v2-phy", },
506 { }
507 };
508 MODULE_DEVICE_TABLE(of, qcom_snps_hsphy_of_match_table);
509
510 static const struct dev_pm_ops qcom_snps_hsphy_pm_ops = {
511 SET_RUNTIME_PM_OPS(qcom_snps_hsphy_runtime_suspend,
512 qcom_snps_hsphy_runtime_resume, NULL)
513 };
514
qcom_snps_hsphy_override_param_update_val(const struct override_param_map map,s32 dt_val,struct phy_override_seq * seq_entry)515 static void qcom_snps_hsphy_override_param_update_val(
516 const struct override_param_map map,
517 s32 dt_val, struct phy_override_seq *seq_entry)
518 {
519 int i;
520
521 /*
522 * Param table for each param is in increasing order
523 * of dt values. We need to iterate over the list to
524 * select the entry that matches the dt value and pick
525 * up the corresponding register value.
526 */
527 for (i = 0; i < map.table_size - 1; i++) {
528 if (map.param_table[i].value == dt_val)
529 break;
530 }
531
532 seq_entry->need_update = true;
533 seq_entry->offset = map.reg_offset;
534 seq_entry->mask = map.param_mask;
535 seq_entry->value = map.param_table[i].reg_val << __ffs(map.param_mask);
536 }
537
qcom_snps_hsphy_read_override_param_seq(struct device * dev)538 static void qcom_snps_hsphy_read_override_param_seq(struct device *dev)
539 {
540 struct device_node *node = dev->of_node;
541 s32 val;
542 int ret, i;
543 struct qcom_snps_hsphy *hsphy;
544 const struct override_param_map *cfg = of_device_get_match_data(dev);
545
546 if (!cfg)
547 return;
548
549 hsphy = dev_get_drvdata(dev);
550
551 for (i = 0; cfg[i].prop_name != NULL; i++) {
552 ret = of_property_read_s32(node, cfg[i].prop_name, &val);
553 if (ret)
554 continue;
555
556 qcom_snps_hsphy_override_param_update_val(cfg[i], val,
557 &hsphy->update_seq_cfg[i]);
558 dev_dbg(&hsphy->phy->dev, "Read param: %s dt_val: %d reg_val: 0x%x\n",
559 cfg[i].prop_name, val, hsphy->update_seq_cfg[i].value);
560
561 }
562 }
563
qcom_snps_hsphy_probe(struct platform_device * pdev)564 static int qcom_snps_hsphy_probe(struct platform_device *pdev)
565 {
566 struct device *dev = &pdev->dev;
567 struct qcom_snps_hsphy *hsphy;
568 struct phy_provider *phy_provider;
569 struct phy *generic_phy;
570 int ret, i;
571 int num;
572
573 hsphy = devm_kzalloc(dev, sizeof(*hsphy), GFP_KERNEL);
574 if (!hsphy)
575 return -ENOMEM;
576
577 hsphy->dev = dev;
578
579 hsphy->base = devm_platform_ioremap_resource(pdev, 0);
580 if (IS_ERR(hsphy->base))
581 return PTR_ERR(hsphy->base);
582
583 ret = qcom_snps_hsphy_clk_init(hsphy);
584 if (ret)
585 return dev_err_probe(dev, ret, "failed to initialize clocks\n");
586
587 hsphy->phy_reset = devm_reset_control_get_exclusive(&pdev->dev, NULL);
588 if (IS_ERR(hsphy->phy_reset)) {
589 dev_err(dev, "failed to get phy core reset\n");
590 return PTR_ERR(hsphy->phy_reset);
591 }
592
593 num = ARRAY_SIZE(hsphy->vregs);
594 for (i = 0; i < num; i++)
595 hsphy->vregs[i].supply = qcom_snps_hsphy_vreg_names[i];
596
597 ret = devm_regulator_bulk_get(dev, num, hsphy->vregs);
598 if (ret)
599 return dev_err_probe(dev, ret,
600 "failed to get regulator supplies\n");
601
602 pm_runtime_set_active(dev);
603 pm_runtime_enable(dev);
604 /*
605 * Prevent runtime pm from being ON by default. Users can enable
606 * it using power/control in sysfs.
607 */
608 pm_runtime_forbid(dev);
609
610 generic_phy = devm_phy_create(dev, NULL, &qcom_snps_hsphy_gen_ops);
611 if (IS_ERR(generic_phy)) {
612 ret = PTR_ERR(generic_phy);
613 dev_err(dev, "failed to create phy, %d\n", ret);
614 return ret;
615 }
616 hsphy->phy = generic_phy;
617
618 dev_set_drvdata(dev, hsphy);
619 phy_set_drvdata(generic_phy, hsphy);
620 qcom_snps_hsphy_read_override_param_seq(dev);
621
622 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
623 if (!IS_ERR(phy_provider))
624 dev_dbg(dev, "Registered Qcom-SNPS HS phy\n");
625 else
626 pm_runtime_disable(dev);
627
628 return PTR_ERR_OR_ZERO(phy_provider);
629 }
630
631 static struct platform_driver qcom_snps_hsphy_driver = {
632 .probe = qcom_snps_hsphy_probe,
633 .driver = {
634 .name = "qcom-snps-hs-femto-v2-phy",
635 .pm = &qcom_snps_hsphy_pm_ops,
636 .of_match_table = qcom_snps_hsphy_of_match_table,
637 },
638 };
639
640 module_platform_driver(qcom_snps_hsphy_driver);
641
642 MODULE_DESCRIPTION("Qualcomm SNPS FEMTO USB HS PHY V2 driver");
643 MODULE_LICENSE("GPL v2");
644