1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Samsung Exynos5 SoC series USB DRD PHY driver
4 *
5 * Phy provider for USB 3.0 DRD controller on Exynos5 SoC series
6 *
7 * Copyright (C) 2014 Samsung Electronics Co., Ltd.
8 * Author: Vivek Gautam <gautam.vivek@samsung.com>
9 */
10
11 #include <linux/clk.h>
12 #include <linux/delay.h>
13 #include <linux/io.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/of.h>
17 #include <linux/iopoll.h>
18 #include <linux/phy/phy.h>
19 #include <linux/platform_device.h>
20 #include <linux/mutex.h>
21 #include <linux/mfd/syscon.h>
22 #include <linux/regmap.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/soc/samsung/exynos-regs-pmu.h>
25
26 /* Exynos USB PHY registers */
27 #define EXYNOS5_FSEL_9MHZ6 0x0
28 #define EXYNOS5_FSEL_10MHZ 0x1
29 #define EXYNOS5_FSEL_12MHZ 0x2
30 #define EXYNOS5_FSEL_19MHZ2 0x3
31 #define EXYNOS5_FSEL_20MHZ 0x4
32 #define EXYNOS5_FSEL_24MHZ 0x5
33 #define EXYNOS5_FSEL_26MHZ 0x82
34 #define EXYNOS5_FSEL_50MHZ 0x7
35
36 /* Exynos5: USB 3.0 DRD PHY registers */
37 #define EXYNOS5_DRD_LINKSYSTEM 0x04
38
39 #define LINKSYSTEM_FLADJ_MASK (0x3f << 1)
40 #define LINKSYSTEM_FLADJ(_x) ((_x) << 1)
41 #define LINKSYSTEM_XHCI_VERSION_CONTROL BIT(27)
42
43 #define EXYNOS5_DRD_PHYUTMI 0x08
44
45 #define PHYUTMI_OTGDISABLE BIT(6)
46 #define PHYUTMI_FORCESUSPEND BIT(1)
47 #define PHYUTMI_FORCESLEEP BIT(0)
48
49 #define EXYNOS5_DRD_PHYPIPE 0x0c
50
51 #define EXYNOS5_DRD_PHYCLKRST 0x10
52
53 #define PHYCLKRST_EN_UTMISUSPEND BIT(31)
54
55 #define PHYCLKRST_SSC_REFCLKSEL_MASK (0xff << 23)
56 #define PHYCLKRST_SSC_REFCLKSEL(_x) ((_x) << 23)
57
58 #define PHYCLKRST_SSC_RANGE_MASK (0x03 << 21)
59 #define PHYCLKRST_SSC_RANGE(_x) ((_x) << 21)
60
61 #define PHYCLKRST_SSC_EN BIT(20)
62 #define PHYCLKRST_REF_SSP_EN BIT(19)
63 #define PHYCLKRST_REF_CLKDIV2 BIT(18)
64
65 #define PHYCLKRST_MPLL_MULTIPLIER_MASK (0x7f << 11)
66 #define PHYCLKRST_MPLL_MULTIPLIER_100MHZ_REF (0x19 << 11)
67 #define PHYCLKRST_MPLL_MULTIPLIER_50M_REF (0x32 << 11)
68 #define PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF (0x68 << 11)
69 #define PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF (0x7d << 11)
70 #define PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF (0x02 << 11)
71
72 #define PHYCLKRST_FSEL_UTMI_MASK (0x7 << 5)
73 #define PHYCLKRST_FSEL_PIPE_MASK (0x7 << 8)
74 #define PHYCLKRST_FSEL(_x) ((_x) << 5)
75 #define PHYCLKRST_FSEL_PAD_100MHZ (0x27 << 5)
76 #define PHYCLKRST_FSEL_PAD_24MHZ (0x2a << 5)
77 #define PHYCLKRST_FSEL_PAD_20MHZ (0x31 << 5)
78 #define PHYCLKRST_FSEL_PAD_19_2MHZ (0x38 << 5)
79
80 #define PHYCLKRST_RETENABLEN BIT(4)
81
82 #define PHYCLKRST_REFCLKSEL_MASK (0x03 << 2)
83 #define PHYCLKRST_REFCLKSEL_PAD_REFCLK (0x2 << 2)
84 #define PHYCLKRST_REFCLKSEL_EXT_REFCLK (0x3 << 2)
85
86 #define PHYCLKRST_PORTRESET BIT(1)
87 #define PHYCLKRST_COMMONONN BIT(0)
88
89 #define EXYNOS5_DRD_PHYREG0 0x14
90 #define PHYREG0_SSC_REF_CLK_SEL BIT(21)
91 #define PHYREG0_SSC_RANGE BIT(20)
92 #define PHYREG0_CR_WRITE BIT(19)
93 #define PHYREG0_CR_READ BIT(18)
94 #define PHYREG0_CR_DATA_IN(_x) ((_x) << 2)
95 #define PHYREG0_CR_CAP_DATA BIT(1)
96 #define PHYREG0_CR_CAP_ADDR BIT(0)
97
98 #define EXYNOS5_DRD_PHYREG1 0x18
99 #define PHYREG1_CR_DATA_OUT(_x) ((_x) << 1)
100 #define PHYREG1_CR_ACK BIT(0)
101
102 #define EXYNOS5_DRD_PHYPARAM0 0x1c
103
104 #define PHYPARAM0_REF_USE_PAD BIT(31)
105 #define PHYPARAM0_REF_LOSLEVEL_MASK (0x1f << 26)
106 #define PHYPARAM0_REF_LOSLEVEL (0x9 << 26)
107
108 #define EXYNOS5_DRD_PHYPARAM1 0x20
109
110 #define PHYPARAM1_PCS_TXDEEMPH_MASK (0x1f << 0)
111 #define PHYPARAM1_PCS_TXDEEMPH (0x1c)
112
113 #define EXYNOS5_DRD_PHYTERM 0x24
114
115 #define EXYNOS5_DRD_PHYTEST 0x28
116
117 #define PHYTEST_POWERDOWN_SSP BIT(3)
118 #define PHYTEST_POWERDOWN_HSP BIT(2)
119
120 #define EXYNOS5_DRD_PHYADP 0x2c
121
122 #define EXYNOS5_DRD_PHYUTMICLKSEL 0x30
123
124 #define PHYUTMICLKSEL_UTMI_CLKSEL BIT(2)
125
126 #define EXYNOS5_DRD_PHYRESUME 0x34
127 #define EXYNOS5_DRD_LINKPORT 0x44
128
129 /* USB 3.0 DRD PHY SS Function Control Reg; accessed by CR_PORT */
130 #define EXYNOS5_DRD_PHYSS_LOSLEVEL_OVRD_IN (0x15)
131 #define LOSLEVEL_OVRD_IN_LOS_BIAS_5420 (0x5 << 13)
132 #define LOSLEVEL_OVRD_IN_LOS_BIAS_DEFAULT (0x0 << 13)
133 #define LOSLEVEL_OVRD_IN_EN (0x1 << 10)
134 #define LOSLEVEL_OVRD_IN_LOS_LEVEL_DEFAULT (0x9 << 0)
135
136 #define EXYNOS5_DRD_PHYSS_TX_VBOOSTLEVEL_OVRD_IN (0x12)
137 #define TX_VBOOSTLEVEL_OVRD_IN_VBOOST_5420 (0x5 << 13)
138 #define TX_VBOOSTLEVEL_OVRD_IN_VBOOST_DEFAULT (0x4 << 13)
139
140 #define EXYNOS5_DRD_PHYSS_LANE0_TX_DEBUG (0x1010)
141 #define LANE0_TX_DEBUG_RXDET_MEAS_TIME_19M2_20M (0x4 << 4)
142 #define LANE0_TX_DEBUG_RXDET_MEAS_TIME_24M (0x8 << 4)
143 #define LANE0_TX_DEBUG_RXDET_MEAS_TIME_25M_26M (0x8 << 4)
144 #define LANE0_TX_DEBUG_RXDET_MEAS_TIME_48M_50M_52M (0x20 << 4)
145 #define LANE0_TX_DEBUG_RXDET_MEAS_TIME_62M5 (0x20 << 4)
146 #define LANE0_TX_DEBUG_RXDET_MEAS_TIME_96M_100M (0x40 << 4)
147
148 /* Exynos850: USB DRD PHY registers */
149 #define EXYNOS850_DRD_LINKCTRL 0x04
150 #define LINKCTRL_BUS_FILTER_BYPASS(_x) ((_x) << 4)
151 #define LINKCTRL_FORCE_QACT BIT(8)
152
153 #define EXYNOS850_DRD_CLKRST 0x20
154 #define CLKRST_LINK_SW_RST BIT(0)
155 #define CLKRST_PORT_RST BIT(1)
156 #define CLKRST_PHY_SW_RST BIT(3)
157
158 #define EXYNOS850_DRD_UTMI 0x50
159 #define UTMI_FORCE_SLEEP BIT(0)
160 #define UTMI_FORCE_SUSPEND BIT(1)
161 #define UTMI_DM_PULLDOWN BIT(2)
162 #define UTMI_DP_PULLDOWN BIT(3)
163 #define UTMI_FORCE_BVALID BIT(4)
164 #define UTMI_FORCE_VBUSVALID BIT(5)
165
166 #define EXYNOS850_DRD_HSP 0x54
167 #define HSP_COMMONONN BIT(8)
168 #define HSP_EN_UTMISUSPEND BIT(9)
169 #define HSP_VBUSVLDEXT BIT(12)
170 #define HSP_VBUSVLDEXTSEL BIT(13)
171 #define HSP_FSV_OUT_EN BIT(24)
172
173 #define EXYNOS850_DRD_HSP_TEST 0x5c
174 #define HSP_TEST_SIDDQ BIT(24)
175
176 #define KHZ 1000
177 #define MHZ (KHZ * KHZ)
178
179 enum exynos5_usbdrd_phy_id {
180 EXYNOS5_DRDPHY_UTMI,
181 EXYNOS5_DRDPHY_PIPE3,
182 EXYNOS5_DRDPHYS_NUM,
183 };
184
185 struct phy_usb_instance;
186 struct exynos5_usbdrd_phy;
187
188 struct exynos5_usbdrd_phy_config {
189 u32 id;
190 void (*phy_isol)(struct phy_usb_instance *inst, u32 on);
191 void (*phy_init)(struct exynos5_usbdrd_phy *phy_drd);
192 unsigned int (*set_refclk)(struct phy_usb_instance *inst);
193 };
194
195 struct exynos5_usbdrd_phy_drvdata {
196 const struct exynos5_usbdrd_phy_config *phy_cfg;
197 const struct phy_ops *phy_ops;
198 u32 pmu_offset_usbdrd0_phy;
199 u32 pmu_offset_usbdrd1_phy;
200 bool has_common_clk_gate;
201 };
202
203 /**
204 * struct exynos5_usbdrd_phy - driver data for USB 3.0 PHY
205 * @dev: pointer to device instance of this platform device
206 * @reg_phy: usb phy controller register memory base
207 * @clk: phy clock for register access
208 * @pipeclk: clock for pipe3 phy
209 * @utmiclk: clock for utmi+ phy
210 * @itpclk: clock for ITP generation
211 * @drv_data: pointer to SoC level driver data structure
212 * @phys: array for 'EXYNOS5_DRDPHYS_NUM' number of PHY
213 * instances each with its 'phy' and 'phy_cfg'.
214 * @extrefclk: frequency select settings when using 'separate
215 * reference clocks' for SS and HS operations
216 * @ref_clk: reference clock to PHY block from which PHY's
217 * operational clocks are derived
218 * @vbus: VBUS regulator for phy
219 * @vbus_boost: Boost regulator for VBUS present on few Exynos boards
220 */
221 struct exynos5_usbdrd_phy {
222 struct device *dev;
223 void __iomem *reg_phy;
224 struct clk *clk;
225 struct clk *pipeclk;
226 struct clk *utmiclk;
227 struct clk *itpclk;
228 const struct exynos5_usbdrd_phy_drvdata *drv_data;
229 struct phy_usb_instance {
230 struct phy *phy;
231 u32 index;
232 struct regmap *reg_pmu;
233 u32 pmu_offset;
234 const struct exynos5_usbdrd_phy_config *phy_cfg;
235 } phys[EXYNOS5_DRDPHYS_NUM];
236 u32 extrefclk;
237 struct clk *ref_clk;
238 struct regulator *vbus;
239 struct regulator *vbus_boost;
240 };
241
242 static inline
to_usbdrd_phy(struct phy_usb_instance * inst)243 struct exynos5_usbdrd_phy *to_usbdrd_phy(struct phy_usb_instance *inst)
244 {
245 return container_of((inst), struct exynos5_usbdrd_phy,
246 phys[(inst)->index]);
247 }
248
249 /*
250 * exynos5_rate_to_clk() converts the supplied clock rate to the value that
251 * can be written to the phy register.
252 */
exynos5_rate_to_clk(unsigned long rate,u32 * reg)253 static unsigned int exynos5_rate_to_clk(unsigned long rate, u32 *reg)
254 {
255 /* EXYNOS5_FSEL_MASK */
256
257 switch (rate) {
258 case 9600 * KHZ:
259 *reg = EXYNOS5_FSEL_9MHZ6;
260 break;
261 case 10 * MHZ:
262 *reg = EXYNOS5_FSEL_10MHZ;
263 break;
264 case 12 * MHZ:
265 *reg = EXYNOS5_FSEL_12MHZ;
266 break;
267 case 19200 * KHZ:
268 *reg = EXYNOS5_FSEL_19MHZ2;
269 break;
270 case 20 * MHZ:
271 *reg = EXYNOS5_FSEL_20MHZ;
272 break;
273 case 24 * MHZ:
274 *reg = EXYNOS5_FSEL_24MHZ;
275 break;
276 case 26 * MHZ:
277 *reg = EXYNOS5_FSEL_26MHZ;
278 break;
279 case 50 * MHZ:
280 *reg = EXYNOS5_FSEL_50MHZ;
281 break;
282 default:
283 return -EINVAL;
284 }
285
286 return 0;
287 }
288
exynos5_usbdrd_phy_isol(struct phy_usb_instance * inst,unsigned int on)289 static void exynos5_usbdrd_phy_isol(struct phy_usb_instance *inst,
290 unsigned int on)
291 {
292 unsigned int val;
293
294 if (!inst->reg_pmu)
295 return;
296
297 val = on ? 0 : EXYNOS4_PHY_ENABLE;
298
299 regmap_update_bits(inst->reg_pmu, inst->pmu_offset,
300 EXYNOS4_PHY_ENABLE, val);
301 }
302
303 /*
304 * Sets the pipe3 phy's clk as EXTREFCLK (XXTI) which is internal clock
305 * from clock core. Further sets multiplier values and spread spectrum
306 * clock settings for SuperSpeed operations.
307 */
308 static unsigned int
exynos5_usbdrd_pipe3_set_refclk(struct phy_usb_instance * inst)309 exynos5_usbdrd_pipe3_set_refclk(struct phy_usb_instance *inst)
310 {
311 u32 reg;
312 struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
313
314 /* restore any previous reference clock settings */
315 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
316
317 /* Use EXTREFCLK as ref clock */
318 reg &= ~PHYCLKRST_REFCLKSEL_MASK;
319 reg |= PHYCLKRST_REFCLKSEL_EXT_REFCLK;
320
321 /* FSEL settings corresponding to reference clock */
322 reg &= ~PHYCLKRST_FSEL_PIPE_MASK |
323 PHYCLKRST_MPLL_MULTIPLIER_MASK |
324 PHYCLKRST_SSC_REFCLKSEL_MASK;
325 switch (phy_drd->extrefclk) {
326 case EXYNOS5_FSEL_50MHZ:
327 reg |= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF |
328 PHYCLKRST_SSC_REFCLKSEL(0x00));
329 break;
330 case EXYNOS5_FSEL_24MHZ:
331 reg |= (PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF |
332 PHYCLKRST_SSC_REFCLKSEL(0x88));
333 break;
334 case EXYNOS5_FSEL_20MHZ:
335 reg |= (PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF |
336 PHYCLKRST_SSC_REFCLKSEL(0x00));
337 break;
338 case EXYNOS5_FSEL_19MHZ2:
339 reg |= (PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF |
340 PHYCLKRST_SSC_REFCLKSEL(0x88));
341 break;
342 default:
343 dev_dbg(phy_drd->dev, "unsupported ref clk\n");
344 break;
345 }
346
347 return reg;
348 }
349
350 /*
351 * Sets the utmi phy's clk as EXTREFCLK (XXTI) which is internal clock
352 * from clock core. Further sets the FSEL values for HighSpeed operations.
353 */
354 static unsigned int
exynos5_usbdrd_utmi_set_refclk(struct phy_usb_instance * inst)355 exynos5_usbdrd_utmi_set_refclk(struct phy_usb_instance *inst)
356 {
357 u32 reg;
358 struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
359
360 /* restore any previous reference clock settings */
361 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
362
363 reg &= ~PHYCLKRST_REFCLKSEL_MASK;
364 reg |= PHYCLKRST_REFCLKSEL_EXT_REFCLK;
365
366 reg &= ~PHYCLKRST_FSEL_UTMI_MASK |
367 PHYCLKRST_MPLL_MULTIPLIER_MASK |
368 PHYCLKRST_SSC_REFCLKSEL_MASK;
369 reg |= PHYCLKRST_FSEL(phy_drd->extrefclk);
370
371 return reg;
372 }
373
exynos5_usbdrd_pipe3_init(struct exynos5_usbdrd_phy * phy_drd)374 static void exynos5_usbdrd_pipe3_init(struct exynos5_usbdrd_phy *phy_drd)
375 {
376 u32 reg;
377
378 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
379 /* Set Tx De-Emphasis level */
380 reg &= ~PHYPARAM1_PCS_TXDEEMPH_MASK;
381 reg |= PHYPARAM1_PCS_TXDEEMPH;
382 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
383
384 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
385 reg &= ~PHYTEST_POWERDOWN_SSP;
386 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
387 }
388
exynos5_usbdrd_utmi_init(struct exynos5_usbdrd_phy * phy_drd)389 static void exynos5_usbdrd_utmi_init(struct exynos5_usbdrd_phy *phy_drd)
390 {
391 u32 reg;
392
393 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
394 /* Set Loss-of-Signal Detector sensitivity */
395 reg &= ~PHYPARAM0_REF_LOSLEVEL_MASK;
396 reg |= PHYPARAM0_REF_LOSLEVEL;
397 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
398
399 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
400 /* Set Tx De-Emphasis level */
401 reg &= ~PHYPARAM1_PCS_TXDEEMPH_MASK;
402 reg |= PHYPARAM1_PCS_TXDEEMPH;
403 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
404
405 /* UTMI Power Control */
406 writel(PHYUTMI_OTGDISABLE, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMI);
407
408 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
409 reg &= ~PHYTEST_POWERDOWN_HSP;
410 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
411 }
412
exynos5_usbdrd_phy_init(struct phy * phy)413 static int exynos5_usbdrd_phy_init(struct phy *phy)
414 {
415 int ret;
416 u32 reg;
417 struct phy_usb_instance *inst = phy_get_drvdata(phy);
418 struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
419
420 ret = clk_prepare_enable(phy_drd->clk);
421 if (ret)
422 return ret;
423
424 /* Reset USB 3.0 PHY */
425 writel(0x0, phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0);
426 writel(0x0, phy_drd->reg_phy + EXYNOS5_DRD_PHYRESUME);
427
428 /*
429 * Setting the Frame length Adj value[6:1] to default 0x20
430 * See xHCI 1.0 spec, 5.2.4
431 */
432 reg = LINKSYSTEM_XHCI_VERSION_CONTROL |
433 LINKSYSTEM_FLADJ(0x20);
434 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_LINKSYSTEM);
435
436 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
437 /* Select PHY CLK source */
438 reg &= ~PHYPARAM0_REF_USE_PAD;
439 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
440
441 /* This bit must be set for both HS and SS operations */
442 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMICLKSEL);
443 reg |= PHYUTMICLKSEL_UTMI_CLKSEL;
444 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMICLKSEL);
445
446 /* UTMI or PIPE3 specific init */
447 inst->phy_cfg->phy_init(phy_drd);
448
449 /* reference clock settings */
450 reg = inst->phy_cfg->set_refclk(inst);
451
452 /* Digital power supply in normal operating mode */
453 reg |= PHYCLKRST_RETENABLEN |
454 /* Enable ref clock for SS function */
455 PHYCLKRST_REF_SSP_EN |
456 /* Enable spread spectrum */
457 PHYCLKRST_SSC_EN |
458 /* Power down HS Bias and PLL blocks in suspend mode */
459 PHYCLKRST_COMMONONN |
460 /* Reset the port */
461 PHYCLKRST_PORTRESET;
462
463 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
464
465 udelay(10);
466
467 reg &= ~PHYCLKRST_PORTRESET;
468 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
469
470 clk_disable_unprepare(phy_drd->clk);
471
472 return 0;
473 }
474
exynos5_usbdrd_phy_exit(struct phy * phy)475 static int exynos5_usbdrd_phy_exit(struct phy *phy)
476 {
477 int ret;
478 u32 reg;
479 struct phy_usb_instance *inst = phy_get_drvdata(phy);
480 struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
481
482 ret = clk_prepare_enable(phy_drd->clk);
483 if (ret)
484 return ret;
485
486 reg = PHYUTMI_OTGDISABLE |
487 PHYUTMI_FORCESUSPEND |
488 PHYUTMI_FORCESLEEP;
489 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMI);
490
491 /* Resetting the PHYCLKRST enable bits to reduce leakage current */
492 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
493 reg &= ~(PHYCLKRST_REF_SSP_EN |
494 PHYCLKRST_SSC_EN |
495 PHYCLKRST_COMMONONN);
496 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
497
498 /* Control PHYTEST to remove leakage current */
499 reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
500 reg |= PHYTEST_POWERDOWN_SSP |
501 PHYTEST_POWERDOWN_HSP;
502 writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
503
504 clk_disable_unprepare(phy_drd->clk);
505
506 return 0;
507 }
508
exynos5_usbdrd_phy_power_on(struct phy * phy)509 static int exynos5_usbdrd_phy_power_on(struct phy *phy)
510 {
511 int ret;
512 struct phy_usb_instance *inst = phy_get_drvdata(phy);
513 struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
514
515 dev_dbg(phy_drd->dev, "Request to power_on usbdrd_phy phy\n");
516
517 clk_prepare_enable(phy_drd->ref_clk);
518 if (!phy_drd->drv_data->has_common_clk_gate) {
519 clk_prepare_enable(phy_drd->pipeclk);
520 clk_prepare_enable(phy_drd->utmiclk);
521 clk_prepare_enable(phy_drd->itpclk);
522 }
523
524 /* Enable VBUS supply */
525 if (phy_drd->vbus_boost) {
526 ret = regulator_enable(phy_drd->vbus_boost);
527 if (ret) {
528 dev_err(phy_drd->dev,
529 "Failed to enable VBUS boost supply\n");
530 goto fail_vbus;
531 }
532 }
533
534 if (phy_drd->vbus) {
535 ret = regulator_enable(phy_drd->vbus);
536 if (ret) {
537 dev_err(phy_drd->dev, "Failed to enable VBUS supply\n");
538 goto fail_vbus_boost;
539 }
540 }
541
542 /* Power-on PHY*/
543 inst->phy_cfg->phy_isol(inst, 0);
544
545 return 0;
546
547 fail_vbus_boost:
548 if (phy_drd->vbus_boost)
549 regulator_disable(phy_drd->vbus_boost);
550
551 fail_vbus:
552 clk_disable_unprepare(phy_drd->ref_clk);
553 if (!phy_drd->drv_data->has_common_clk_gate) {
554 clk_disable_unprepare(phy_drd->itpclk);
555 clk_disable_unprepare(phy_drd->utmiclk);
556 clk_disable_unprepare(phy_drd->pipeclk);
557 }
558
559 return ret;
560 }
561
exynos5_usbdrd_phy_power_off(struct phy * phy)562 static int exynos5_usbdrd_phy_power_off(struct phy *phy)
563 {
564 struct phy_usb_instance *inst = phy_get_drvdata(phy);
565 struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
566
567 dev_dbg(phy_drd->dev, "Request to power_off usbdrd_phy phy\n");
568
569 /* Power-off the PHY */
570 inst->phy_cfg->phy_isol(inst, 1);
571
572 /* Disable VBUS supply */
573 if (phy_drd->vbus)
574 regulator_disable(phy_drd->vbus);
575 if (phy_drd->vbus_boost)
576 regulator_disable(phy_drd->vbus_boost);
577
578 clk_disable_unprepare(phy_drd->ref_clk);
579 if (!phy_drd->drv_data->has_common_clk_gate) {
580 clk_disable_unprepare(phy_drd->itpclk);
581 clk_disable_unprepare(phy_drd->pipeclk);
582 clk_disable_unprepare(phy_drd->utmiclk);
583 }
584
585 return 0;
586 }
587
crport_handshake(struct exynos5_usbdrd_phy * phy_drd,u32 val,u32 cmd)588 static int crport_handshake(struct exynos5_usbdrd_phy *phy_drd,
589 u32 val, u32 cmd)
590 {
591 unsigned int result;
592 int err;
593
594 writel(val | cmd, phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0);
595
596 err = readl_poll_timeout(phy_drd->reg_phy + EXYNOS5_DRD_PHYREG1,
597 result, (result & PHYREG1_CR_ACK), 1, 100);
598 if (err == -ETIMEDOUT) {
599 dev_err(phy_drd->dev, "CRPORT handshake timeout1 (0x%08x)\n", val);
600 return err;
601 }
602
603 writel(val, phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0);
604
605 err = readl_poll_timeout(phy_drd->reg_phy + EXYNOS5_DRD_PHYREG1,
606 result, !(result & PHYREG1_CR_ACK), 1, 100);
607 if (err == -ETIMEDOUT) {
608 dev_err(phy_drd->dev, "CRPORT handshake timeout2 (0x%08x)\n", val);
609 return err;
610 }
611
612 return 0;
613 }
614
crport_ctrl_write(struct exynos5_usbdrd_phy * phy_drd,u32 addr,u32 data)615 static int crport_ctrl_write(struct exynos5_usbdrd_phy *phy_drd,
616 u32 addr, u32 data)
617 {
618 int ret;
619
620 /* Write Address */
621 writel(PHYREG0_CR_DATA_IN(addr),
622 phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0);
623 ret = crport_handshake(phy_drd, PHYREG0_CR_DATA_IN(addr),
624 PHYREG0_CR_CAP_ADDR);
625 if (ret)
626 return ret;
627
628 /* Write Data */
629 writel(PHYREG0_CR_DATA_IN(data),
630 phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0);
631 ret = crport_handshake(phy_drd, PHYREG0_CR_DATA_IN(data),
632 PHYREG0_CR_CAP_DATA);
633 if (ret)
634 return ret;
635
636 ret = crport_handshake(phy_drd, PHYREG0_CR_DATA_IN(data),
637 PHYREG0_CR_WRITE);
638
639 return ret;
640 }
641
642 /*
643 * Calibrate few PHY parameters using CR_PORT register to meet
644 * SuperSpeed requirements on Exynos5420 and Exynos5800 systems,
645 * which have 28nm USB 3.0 DRD PHY.
646 */
exynos5420_usbdrd_phy_calibrate(struct exynos5_usbdrd_phy * phy_drd)647 static int exynos5420_usbdrd_phy_calibrate(struct exynos5_usbdrd_phy *phy_drd)
648 {
649 unsigned int temp;
650 int ret = 0;
651
652 /*
653 * Change los_bias to (0x5) for 28nm PHY from a
654 * default value (0x0); los_level is set as default
655 * (0x9) as also reflected in los_level[30:26] bits
656 * of PHYPARAM0 register.
657 */
658 temp = LOSLEVEL_OVRD_IN_LOS_BIAS_5420 |
659 LOSLEVEL_OVRD_IN_EN |
660 LOSLEVEL_OVRD_IN_LOS_LEVEL_DEFAULT;
661 ret = crport_ctrl_write(phy_drd,
662 EXYNOS5_DRD_PHYSS_LOSLEVEL_OVRD_IN,
663 temp);
664 if (ret) {
665 dev_err(phy_drd->dev,
666 "Failed setting Loss-of-Signal level for SuperSpeed\n");
667 return ret;
668 }
669
670 /*
671 * Set tx_vboost_lvl to (0x5) for 28nm PHY Tuning,
672 * to raise Tx signal level from its default value of (0x4)
673 */
674 temp = TX_VBOOSTLEVEL_OVRD_IN_VBOOST_5420;
675 ret = crport_ctrl_write(phy_drd,
676 EXYNOS5_DRD_PHYSS_TX_VBOOSTLEVEL_OVRD_IN,
677 temp);
678 if (ret) {
679 dev_err(phy_drd->dev,
680 "Failed setting Tx-Vboost-Level for SuperSpeed\n");
681 return ret;
682 }
683
684 /*
685 * Set proper time to wait for RxDetect measurement, for
686 * desired reference clock of PHY, by tuning the CR_PORT
687 * register LANE0.TX_DEBUG which is internal to PHY.
688 * This fixes issue with few USB 3.0 devices, which are
689 * not detected (not even generate interrupts on the bus
690 * on insertion) without this change.
691 * e.g. Samsung SUM-TSB16S 3.0 USB drive.
692 */
693 switch (phy_drd->extrefclk) {
694 case EXYNOS5_FSEL_50MHZ:
695 temp = LANE0_TX_DEBUG_RXDET_MEAS_TIME_48M_50M_52M;
696 break;
697 case EXYNOS5_FSEL_20MHZ:
698 case EXYNOS5_FSEL_19MHZ2:
699 temp = LANE0_TX_DEBUG_RXDET_MEAS_TIME_19M2_20M;
700 break;
701 case EXYNOS5_FSEL_24MHZ:
702 default:
703 temp = LANE0_TX_DEBUG_RXDET_MEAS_TIME_24M;
704 break;
705 }
706
707 ret = crport_ctrl_write(phy_drd,
708 EXYNOS5_DRD_PHYSS_LANE0_TX_DEBUG,
709 temp);
710 if (ret)
711 dev_err(phy_drd->dev,
712 "Fail to set RxDet measurement time for SuperSpeed\n");
713
714 return ret;
715 }
716
exynos5_usbdrd_phy_xlate(struct device * dev,struct of_phandle_args * args)717 static struct phy *exynos5_usbdrd_phy_xlate(struct device *dev,
718 struct of_phandle_args *args)
719 {
720 struct exynos5_usbdrd_phy *phy_drd = dev_get_drvdata(dev);
721
722 if (WARN_ON(args->args[0] >= EXYNOS5_DRDPHYS_NUM))
723 return ERR_PTR(-ENODEV);
724
725 return phy_drd->phys[args->args[0]].phy;
726 }
727
exynos5_usbdrd_phy_calibrate(struct phy * phy)728 static int exynos5_usbdrd_phy_calibrate(struct phy *phy)
729 {
730 struct phy_usb_instance *inst = phy_get_drvdata(phy);
731 struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
732
733 if (inst->phy_cfg->id == EXYNOS5_DRDPHY_UTMI)
734 return exynos5420_usbdrd_phy_calibrate(phy_drd);
735 return 0;
736 }
737
738 static const struct phy_ops exynos5_usbdrd_phy_ops = {
739 .init = exynos5_usbdrd_phy_init,
740 .exit = exynos5_usbdrd_phy_exit,
741 .power_on = exynos5_usbdrd_phy_power_on,
742 .power_off = exynos5_usbdrd_phy_power_off,
743 .calibrate = exynos5_usbdrd_phy_calibrate,
744 .owner = THIS_MODULE,
745 };
746
exynos850_usbdrd_utmi_init(struct exynos5_usbdrd_phy * phy_drd)747 static void exynos850_usbdrd_utmi_init(struct exynos5_usbdrd_phy *phy_drd)
748 {
749 void __iomem *regs_base = phy_drd->reg_phy;
750 u32 reg;
751
752 /*
753 * Disable HWACG (hardware auto clock gating control). This will force
754 * QACTIVE signal in Q-Channel interface to HIGH level, to make sure
755 * the PHY clock is not gated by the hardware.
756 */
757 reg = readl(regs_base + EXYNOS850_DRD_LINKCTRL);
758 reg |= LINKCTRL_FORCE_QACT;
759 writel(reg, regs_base + EXYNOS850_DRD_LINKCTRL);
760
761 /* Start PHY Reset (POR=high) */
762 reg = readl(regs_base + EXYNOS850_DRD_CLKRST);
763 reg |= CLKRST_PHY_SW_RST;
764 writel(reg, regs_base + EXYNOS850_DRD_CLKRST);
765
766 /* Enable UTMI+ */
767 reg = readl(regs_base + EXYNOS850_DRD_UTMI);
768 reg &= ~(UTMI_FORCE_SUSPEND | UTMI_FORCE_SLEEP | UTMI_DP_PULLDOWN |
769 UTMI_DM_PULLDOWN);
770 writel(reg, regs_base + EXYNOS850_DRD_UTMI);
771
772 /* Set PHY clock and control HS PHY */
773 reg = readl(regs_base + EXYNOS850_DRD_HSP);
774 reg |= HSP_EN_UTMISUSPEND | HSP_COMMONONN;
775 writel(reg, regs_base + EXYNOS850_DRD_HSP);
776
777 /* Set VBUS Valid and D+ pull-up control by VBUS pad usage */
778 reg = readl(regs_base + EXYNOS850_DRD_LINKCTRL);
779 reg |= LINKCTRL_BUS_FILTER_BYPASS(0xf);
780 writel(reg, regs_base + EXYNOS850_DRD_LINKCTRL);
781
782 reg = readl(regs_base + EXYNOS850_DRD_UTMI);
783 reg |= UTMI_FORCE_BVALID | UTMI_FORCE_VBUSVALID;
784 writel(reg, regs_base + EXYNOS850_DRD_UTMI);
785
786 reg = readl(regs_base + EXYNOS850_DRD_HSP);
787 reg |= HSP_VBUSVLDEXT | HSP_VBUSVLDEXTSEL;
788 writel(reg, regs_base + EXYNOS850_DRD_HSP);
789
790 /* Power up PHY analog blocks */
791 reg = readl(regs_base + EXYNOS850_DRD_HSP_TEST);
792 reg &= ~HSP_TEST_SIDDQ;
793 writel(reg, regs_base + EXYNOS850_DRD_HSP_TEST);
794
795 /* Finish PHY reset (POR=low) */
796 udelay(10); /* required before doing POR=low */
797 reg = readl(regs_base + EXYNOS850_DRD_CLKRST);
798 reg &= ~(CLKRST_PHY_SW_RST | CLKRST_PORT_RST);
799 writel(reg, regs_base + EXYNOS850_DRD_CLKRST);
800 udelay(75); /* required after POR=low for guaranteed PHY clock */
801
802 /* Disable single ended signal out */
803 reg = readl(regs_base + EXYNOS850_DRD_HSP);
804 reg &= ~HSP_FSV_OUT_EN;
805 writel(reg, regs_base + EXYNOS850_DRD_HSP);
806 }
807
exynos850_usbdrd_phy_init(struct phy * phy)808 static int exynos850_usbdrd_phy_init(struct phy *phy)
809 {
810 struct phy_usb_instance *inst = phy_get_drvdata(phy);
811 struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
812 int ret;
813
814 ret = clk_prepare_enable(phy_drd->clk);
815 if (ret)
816 return ret;
817
818 /* UTMI or PIPE3 specific init */
819 inst->phy_cfg->phy_init(phy_drd);
820
821 clk_disable_unprepare(phy_drd->clk);
822
823 return 0;
824 }
825
exynos850_usbdrd_phy_exit(struct phy * phy)826 static int exynos850_usbdrd_phy_exit(struct phy *phy)
827 {
828 struct phy_usb_instance *inst = phy_get_drvdata(phy);
829 struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
830 void __iomem *regs_base = phy_drd->reg_phy;
831 u32 reg;
832 int ret;
833
834 ret = clk_prepare_enable(phy_drd->clk);
835 if (ret)
836 return ret;
837
838 /* Set PHY clock and control HS PHY */
839 reg = readl(regs_base + EXYNOS850_DRD_UTMI);
840 reg &= ~(UTMI_DP_PULLDOWN | UTMI_DM_PULLDOWN);
841 reg |= UTMI_FORCE_SUSPEND | UTMI_FORCE_SLEEP;
842 writel(reg, regs_base + EXYNOS850_DRD_UTMI);
843
844 /* Power down PHY analog blocks */
845 reg = readl(regs_base + EXYNOS850_DRD_HSP_TEST);
846 reg |= HSP_TEST_SIDDQ;
847 writel(reg, regs_base + EXYNOS850_DRD_HSP_TEST);
848
849 /* Link reset */
850 reg = readl(regs_base + EXYNOS850_DRD_CLKRST);
851 reg |= CLKRST_LINK_SW_RST;
852 writel(reg, regs_base + EXYNOS850_DRD_CLKRST);
853 udelay(10); /* required before doing POR=low */
854 reg &= ~CLKRST_LINK_SW_RST;
855 writel(reg, regs_base + EXYNOS850_DRD_CLKRST);
856
857 clk_disable_unprepare(phy_drd->clk);
858
859 return 0;
860 }
861
862 static const struct phy_ops exynos850_usbdrd_phy_ops = {
863 .init = exynos850_usbdrd_phy_init,
864 .exit = exynos850_usbdrd_phy_exit,
865 .power_on = exynos5_usbdrd_phy_power_on,
866 .power_off = exynos5_usbdrd_phy_power_off,
867 .owner = THIS_MODULE,
868 };
869
exynos5_usbdrd_phy_clk_handle(struct exynos5_usbdrd_phy * phy_drd)870 static int exynos5_usbdrd_phy_clk_handle(struct exynos5_usbdrd_phy *phy_drd)
871 {
872 unsigned long ref_rate;
873 int ret;
874
875 phy_drd->clk = devm_clk_get(phy_drd->dev, "phy");
876 if (IS_ERR(phy_drd->clk)) {
877 dev_err(phy_drd->dev, "Failed to get phy clock\n");
878 return PTR_ERR(phy_drd->clk);
879 }
880
881 phy_drd->ref_clk = devm_clk_get(phy_drd->dev, "ref");
882 if (IS_ERR(phy_drd->ref_clk)) {
883 dev_err(phy_drd->dev, "Failed to get phy reference clock\n");
884 return PTR_ERR(phy_drd->ref_clk);
885 }
886 ref_rate = clk_get_rate(phy_drd->ref_clk);
887
888 ret = exynos5_rate_to_clk(ref_rate, &phy_drd->extrefclk);
889 if (ret) {
890 dev_err(phy_drd->dev, "Clock rate (%ld) not supported\n",
891 ref_rate);
892 return ret;
893 }
894
895 if (!phy_drd->drv_data->has_common_clk_gate) {
896 phy_drd->pipeclk = devm_clk_get(phy_drd->dev, "phy_pipe");
897 if (IS_ERR(phy_drd->pipeclk)) {
898 dev_info(phy_drd->dev,
899 "PIPE3 phy operational clock not specified\n");
900 phy_drd->pipeclk = NULL;
901 }
902
903 phy_drd->utmiclk = devm_clk_get(phy_drd->dev, "phy_utmi");
904 if (IS_ERR(phy_drd->utmiclk)) {
905 dev_info(phy_drd->dev,
906 "UTMI phy operational clock not specified\n");
907 phy_drd->utmiclk = NULL;
908 }
909
910 phy_drd->itpclk = devm_clk_get(phy_drd->dev, "itp");
911 if (IS_ERR(phy_drd->itpclk)) {
912 dev_info(phy_drd->dev,
913 "ITP clock from main OSC not specified\n");
914 phy_drd->itpclk = NULL;
915 }
916 }
917
918 return 0;
919 }
920
921 static const struct exynos5_usbdrd_phy_config phy_cfg_exynos5[] = {
922 {
923 .id = EXYNOS5_DRDPHY_UTMI,
924 .phy_isol = exynos5_usbdrd_phy_isol,
925 .phy_init = exynos5_usbdrd_utmi_init,
926 .set_refclk = exynos5_usbdrd_utmi_set_refclk,
927 },
928 {
929 .id = EXYNOS5_DRDPHY_PIPE3,
930 .phy_isol = exynos5_usbdrd_phy_isol,
931 .phy_init = exynos5_usbdrd_pipe3_init,
932 .set_refclk = exynos5_usbdrd_pipe3_set_refclk,
933 },
934 };
935
936 static const struct exynos5_usbdrd_phy_config phy_cfg_exynos850[] = {
937 {
938 .id = EXYNOS5_DRDPHY_UTMI,
939 .phy_isol = exynos5_usbdrd_phy_isol,
940 .phy_init = exynos850_usbdrd_utmi_init,
941 },
942 };
943
944 static const struct exynos5_usbdrd_phy_drvdata exynos5420_usbdrd_phy = {
945 .phy_cfg = phy_cfg_exynos5,
946 .phy_ops = &exynos5_usbdrd_phy_ops,
947 .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL,
948 .pmu_offset_usbdrd1_phy = EXYNOS5420_USBDRD1_PHY_CONTROL,
949 .has_common_clk_gate = true,
950 };
951
952 static const struct exynos5_usbdrd_phy_drvdata exynos5250_usbdrd_phy = {
953 .phy_cfg = phy_cfg_exynos5,
954 .phy_ops = &exynos5_usbdrd_phy_ops,
955 .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL,
956 .has_common_clk_gate = true,
957 };
958
959 static const struct exynos5_usbdrd_phy_drvdata exynos5433_usbdrd_phy = {
960 .phy_cfg = phy_cfg_exynos5,
961 .phy_ops = &exynos5_usbdrd_phy_ops,
962 .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL,
963 .pmu_offset_usbdrd1_phy = EXYNOS5433_USBHOST30_PHY_CONTROL,
964 .has_common_clk_gate = false,
965 };
966
967 static const struct exynos5_usbdrd_phy_drvdata exynos7_usbdrd_phy = {
968 .phy_cfg = phy_cfg_exynos5,
969 .phy_ops = &exynos5_usbdrd_phy_ops,
970 .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL,
971 .has_common_clk_gate = false,
972 };
973
974 static const struct exynos5_usbdrd_phy_drvdata exynos850_usbdrd_phy = {
975 .phy_cfg = phy_cfg_exynos850,
976 .phy_ops = &exynos850_usbdrd_phy_ops,
977 .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL,
978 .has_common_clk_gate = true,
979 };
980
981 static const struct of_device_id exynos5_usbdrd_phy_of_match[] = {
982 {
983 .compatible = "samsung,exynos5250-usbdrd-phy",
984 .data = &exynos5250_usbdrd_phy
985 }, {
986 .compatible = "samsung,exynos5420-usbdrd-phy",
987 .data = &exynos5420_usbdrd_phy
988 }, {
989 .compatible = "samsung,exynos5433-usbdrd-phy",
990 .data = &exynos5433_usbdrd_phy
991 }, {
992 .compatible = "samsung,exynos7-usbdrd-phy",
993 .data = &exynos7_usbdrd_phy
994 }, {
995 .compatible = "samsung,exynos850-usbdrd-phy",
996 .data = &exynos850_usbdrd_phy
997 },
998 { },
999 };
1000 MODULE_DEVICE_TABLE(of, exynos5_usbdrd_phy_of_match);
1001
exynos5_usbdrd_phy_probe(struct platform_device * pdev)1002 static int exynos5_usbdrd_phy_probe(struct platform_device *pdev)
1003 {
1004 struct device *dev = &pdev->dev;
1005 struct device_node *node = dev->of_node;
1006 struct exynos5_usbdrd_phy *phy_drd;
1007 struct phy_provider *phy_provider;
1008 const struct exynos5_usbdrd_phy_drvdata *drv_data;
1009 struct regmap *reg_pmu;
1010 u32 pmu_offset;
1011 int i, ret;
1012 int channel;
1013
1014 phy_drd = devm_kzalloc(dev, sizeof(*phy_drd), GFP_KERNEL);
1015 if (!phy_drd)
1016 return -ENOMEM;
1017
1018 dev_set_drvdata(dev, phy_drd);
1019 phy_drd->dev = dev;
1020
1021 phy_drd->reg_phy = devm_platform_ioremap_resource(pdev, 0);
1022 if (IS_ERR(phy_drd->reg_phy))
1023 return PTR_ERR(phy_drd->reg_phy);
1024
1025 drv_data = of_device_get_match_data(dev);
1026 if (!drv_data)
1027 return -EINVAL;
1028
1029 phy_drd->drv_data = drv_data;
1030
1031 ret = exynos5_usbdrd_phy_clk_handle(phy_drd);
1032 if (ret) {
1033 dev_err(dev, "Failed to initialize clocks\n");
1034 return ret;
1035 }
1036
1037 reg_pmu = syscon_regmap_lookup_by_phandle(dev->of_node,
1038 "samsung,pmu-syscon");
1039 if (IS_ERR(reg_pmu)) {
1040 dev_err(dev, "Failed to lookup PMU regmap\n");
1041 return PTR_ERR(reg_pmu);
1042 }
1043
1044 /*
1045 * Exynos5420 SoC has multiple channels for USB 3.0 PHY, with
1046 * each having separate power control registers.
1047 * 'channel' facilitates to set such registers.
1048 */
1049 channel = of_alias_get_id(node, "usbdrdphy");
1050 if (channel < 0)
1051 dev_dbg(dev, "Not a multi-controller usbdrd phy\n");
1052
1053 switch (channel) {
1054 case 1:
1055 pmu_offset = phy_drd->drv_data->pmu_offset_usbdrd1_phy;
1056 break;
1057 case 0:
1058 default:
1059 pmu_offset = phy_drd->drv_data->pmu_offset_usbdrd0_phy;
1060 break;
1061 }
1062
1063 /* Get Vbus regulators */
1064 phy_drd->vbus = devm_regulator_get(dev, "vbus");
1065 if (IS_ERR(phy_drd->vbus)) {
1066 ret = PTR_ERR(phy_drd->vbus);
1067 if (ret == -EPROBE_DEFER)
1068 return ret;
1069
1070 dev_warn(dev, "Failed to get VBUS supply regulator\n");
1071 phy_drd->vbus = NULL;
1072 }
1073
1074 phy_drd->vbus_boost = devm_regulator_get(dev, "vbus-boost");
1075 if (IS_ERR(phy_drd->vbus_boost)) {
1076 ret = PTR_ERR(phy_drd->vbus_boost);
1077 if (ret == -EPROBE_DEFER)
1078 return ret;
1079
1080 dev_warn(dev, "Failed to get VBUS boost supply regulator\n");
1081 phy_drd->vbus_boost = NULL;
1082 }
1083
1084 dev_vdbg(dev, "Creating usbdrd_phy phy\n");
1085
1086 for (i = 0; i < EXYNOS5_DRDPHYS_NUM; i++) {
1087 struct phy *phy = devm_phy_create(dev, NULL, drv_data->phy_ops);
1088
1089 if (IS_ERR(phy)) {
1090 dev_err(dev, "Failed to create usbdrd_phy phy\n");
1091 return PTR_ERR(phy);
1092 }
1093
1094 phy_drd->phys[i].phy = phy;
1095 phy_drd->phys[i].index = i;
1096 phy_drd->phys[i].reg_pmu = reg_pmu;
1097 phy_drd->phys[i].pmu_offset = pmu_offset;
1098 phy_drd->phys[i].phy_cfg = &drv_data->phy_cfg[i];
1099 phy_set_drvdata(phy, &phy_drd->phys[i]);
1100 }
1101
1102 phy_provider = devm_of_phy_provider_register(dev,
1103 exynos5_usbdrd_phy_xlate);
1104 if (IS_ERR(phy_provider)) {
1105 dev_err(phy_drd->dev, "Failed to register phy provider\n");
1106 return PTR_ERR(phy_provider);
1107 }
1108
1109 return 0;
1110 }
1111
1112 static struct platform_driver exynos5_usb3drd_phy = {
1113 .probe = exynos5_usbdrd_phy_probe,
1114 .driver = {
1115 .of_match_table = exynos5_usbdrd_phy_of_match,
1116 .name = "exynos5_usb3drd_phy",
1117 .suppress_bind_attrs = true,
1118 }
1119 };
1120
1121 module_platform_driver(exynos5_usb3drd_phy);
1122 MODULE_DESCRIPTION("Samsung Exynos5 SoCs USB 3.0 DRD controller PHY driver");
1123 MODULE_AUTHOR("Vivek Gautam <gautam.vivek@samsung.com>");
1124 MODULE_LICENSE("GPL v2");
1125 MODULE_ALIAS("platform:exynos5_usb3drd_phy");
1126