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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
[deliverable/linux.git] / drivers / phy / phy-mt65xx-usb3.c
1 /*
2 * Copyright (c) 2015 MediaTek Inc.
3 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
4 *
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 */
15
16 #include <dt-bindings/phy/phy.h>
17 #include <linux/clk.h>
18 #include <linux/delay.h>
19 #include <linux/io.h>
20 #include <linux/iopoll.h>
21 #include <linux/module.h>
22 #include <linux/of_address.h>
23 #include <linux/phy/phy.h>
24 #include <linux/platform_device.h>
25
26 /*
27 * for sifslv2 register, but exclude port's;
28 * relative to USB3_SIF2_BASE base address
29 */
30 #define SSUSB_SIFSLV_SPLLC 0x0000
31 #define SSUSB_SIFSLV_U2FREQ 0x0100
32
33 /* offsets of sub-segment in each port registers */
34 #define SSUSB_SIFSLV_U2PHY_COM_BASE 0x0000
35 #define SSUSB_SIFSLV_U3PHYD_BASE 0x0100
36 #define SSUSB_USB30_PHYA_SIV_B_BASE 0x0300
37 #define SSUSB_SIFSLV_U3PHYA_DA_BASE 0x0400
38
39 #define U3P_USBPHYACR0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0000)
40 #define PA0_RG_U2PLL_FORCE_ON BIT(15)
41
42 #define U3P_USBPHYACR2 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0008)
43 #define PA2_RG_SIF_U2PLL_FORCE_EN BIT(18)
44
45 #define U3P_USBPHYACR5 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0014)
46 #define PA5_RG_U2_HSTX_SRCAL_EN BIT(15)
47 #define PA5_RG_U2_HSTX_SRCTRL GENMASK(14, 12)
48 #define PA5_RG_U2_HSTX_SRCTRL_VAL(x) ((0x7 & (x)) << 12)
49 #define PA5_RG_U2_HS_100U_U3_EN BIT(11)
50
51 #define U3P_USBPHYACR6 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0018)
52 #define PA6_RG_U2_ISO_EN BIT(31)
53 #define PA6_RG_U2_BC11_SW_EN BIT(23)
54 #define PA6_RG_U2_OTG_VBUSCMP_EN BIT(20)
55 #define PA6_RG_U2_SQTH GENMASK(3, 0)
56 #define PA6_RG_U2_SQTH_VAL(x) (0xf & (x))
57
58 #define U3P_U2PHYACR4 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0020)
59 #define P2C_RG_USB20_GPIO_CTL BIT(9)
60 #define P2C_USB20_GPIO_MODE BIT(8)
61 #define P2C_U2_GPIO_CTR_MSK (P2C_RG_USB20_GPIO_CTL | P2C_USB20_GPIO_MODE)
62
63 #define U3D_U2PHYDCR0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0060)
64 #define P2C_RG_SIF_U2PLL_FORCE_ON BIT(24)
65
66 #define U3P_U2PHYDTM0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0068)
67 #define P2C_FORCE_UART_EN BIT(26)
68 #define P2C_FORCE_DATAIN BIT(23)
69 #define P2C_FORCE_DM_PULLDOWN BIT(21)
70 #define P2C_FORCE_DP_PULLDOWN BIT(20)
71 #define P2C_FORCE_XCVRSEL BIT(19)
72 #define P2C_FORCE_SUSPENDM BIT(18)
73 #define P2C_FORCE_TERMSEL BIT(17)
74 #define P2C_RG_DATAIN GENMASK(13, 10)
75 #define P2C_RG_DATAIN_VAL(x) ((0xf & (x)) << 10)
76 #define P2C_RG_DMPULLDOWN BIT(7)
77 #define P2C_RG_DPPULLDOWN BIT(6)
78 #define P2C_RG_XCVRSEL GENMASK(5, 4)
79 #define P2C_RG_XCVRSEL_VAL(x) ((0x3 & (x)) << 4)
80 #define P2C_RG_SUSPENDM BIT(3)
81 #define P2C_RG_TERMSEL BIT(2)
82 #define P2C_DTM0_PART_MASK \
83 (P2C_FORCE_DATAIN | P2C_FORCE_DM_PULLDOWN | \
84 P2C_FORCE_DP_PULLDOWN | P2C_FORCE_XCVRSEL | \
85 P2C_FORCE_TERMSEL | P2C_RG_DMPULLDOWN | \
86 P2C_RG_DPPULLDOWN | P2C_RG_TERMSEL)
87
88 #define U3P_U2PHYDTM1 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x006C)
89 #define P2C_RG_UART_EN BIT(16)
90 #define P2C_RG_VBUSVALID BIT(5)
91 #define P2C_RG_SESSEND BIT(4)
92 #define P2C_RG_AVALID BIT(2)
93
94 #define U3P_U3_PHYA_REG0 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0000)
95 #define P3A_RG_U3_VUSB10_ON BIT(5)
96
97 #define U3P_U3_PHYA_REG6 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0018)
98 #define P3A_RG_TX_EIDLE_CM GENMASK(31, 28)
99 #define P3A_RG_TX_EIDLE_CM_VAL(x) ((0xf & (x)) << 28)
100
101 #define U3P_U3_PHYA_REG9 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0024)
102 #define P3A_RG_RX_DAC_MUX GENMASK(5, 1)
103 #define P3A_RG_RX_DAC_MUX_VAL(x) ((0x1f & (x)) << 1)
104
105 #define U3P_U3PHYA_DA_REG0 (SSUSB_SIFSLV_U3PHYA_DA_BASE + 0x0000)
106 #define P3A_RG_XTAL_EXT_EN_U3 GENMASK(11, 10)
107 #define P3A_RG_XTAL_EXT_EN_U3_VAL(x) ((0x3 & (x)) << 10)
108
109 #define U3P_PHYD_CDR1 (SSUSB_SIFSLV_U3PHYD_BASE + 0x005c)
110 #define P3D_RG_CDR_BIR_LTD1 GENMASK(28, 24)
111 #define P3D_RG_CDR_BIR_LTD1_VAL(x) ((0x1f & (x)) << 24)
112 #define P3D_RG_CDR_BIR_LTD0 GENMASK(12, 8)
113 #define P3D_RG_CDR_BIR_LTD0_VAL(x) ((0x1f & (x)) << 8)
114
115 #define U3P_XTALCTL3 (SSUSB_SIFSLV_SPLLC + 0x0018)
116 #define XC3_RG_U3_XTAL_RX_PWD BIT(9)
117 #define XC3_RG_U3_FRC_XTAL_RX_PWD BIT(8)
118
119 #define U3P_U2FREQ_FMCR0 (SSUSB_SIFSLV_U2FREQ + 0x00)
120 #define P2F_RG_MONCLK_SEL GENMASK(27, 26)
121 #define P2F_RG_MONCLK_SEL_VAL(x) ((0x3 & (x)) << 26)
122 #define P2F_RG_FREQDET_EN BIT(24)
123 #define P2F_RG_CYCLECNT GENMASK(23, 0)
124 #define P2F_RG_CYCLECNT_VAL(x) ((P2F_RG_CYCLECNT) & (x))
125
126 #define U3P_U2FREQ_VALUE (SSUSB_SIFSLV_U2FREQ + 0x0c)
127
128 #define U3P_U2FREQ_FMMONR1 (SSUSB_SIFSLV_U2FREQ + 0x10)
129 #define P2F_USB_FM_VALID BIT(0)
130 #define P2F_RG_FRCK_EN BIT(8)
131
132 #define U3P_REF_CLK 26 /* MHZ */
133 #define U3P_SLEW_RATE_COEF 28
134 #define U3P_SR_COEF_DIVISOR 1000
135 #define U3P_FM_DET_CYCLE_CNT 1024
136
137 struct mt65xx_phy_pdata {
138 /* avoid RX sensitivity level degradation only for mt8173 */
139 bool avoid_rx_sen_degradation;
140 };
141
142 struct mt65xx_phy_instance {
143 struct phy *phy;
144 void __iomem *port_base;
145 u32 index;
146 u8 type;
147 };
148
149 struct mt65xx_u3phy {
150 struct device *dev;
151 void __iomem *sif_base; /* include sif2, but exclude port's */
152 struct clk *u3phya_ref; /* reference clock of usb3 anolog phy */
153 const struct mt65xx_phy_pdata *pdata;
154 struct mt65xx_phy_instance **phys;
155 int nphys;
156 };
157
158 static void hs_slew_rate_calibrate(struct mt65xx_u3phy *u3phy,
159 struct mt65xx_phy_instance *instance)
160 {
161 void __iomem *sif_base = u3phy->sif_base;
162 int calibration_val;
163 int fm_out;
164 u32 tmp;
165
166 /* enable USB ring oscillator */
167 tmp = readl(instance->port_base + U3P_USBPHYACR5);
168 tmp |= PA5_RG_U2_HSTX_SRCAL_EN;
169 writel(tmp, instance->port_base + U3P_USBPHYACR5);
170 udelay(1);
171
172 /*enable free run clock */
173 tmp = readl(sif_base + U3P_U2FREQ_FMMONR1);
174 tmp |= P2F_RG_FRCK_EN;
175 writel(tmp, sif_base + U3P_U2FREQ_FMMONR1);
176
177 /* set cycle count as 1024, and select u2 channel */
178 tmp = readl(sif_base + U3P_U2FREQ_FMCR0);
179 tmp &= ~(P2F_RG_CYCLECNT | P2F_RG_MONCLK_SEL);
180 tmp |= P2F_RG_CYCLECNT_VAL(U3P_FM_DET_CYCLE_CNT);
181 tmp |= P2F_RG_MONCLK_SEL_VAL(instance->index);
182 writel(tmp, sif_base + U3P_U2FREQ_FMCR0);
183
184 /* enable frequency meter */
185 tmp = readl(sif_base + U3P_U2FREQ_FMCR0);
186 tmp |= P2F_RG_FREQDET_EN;
187 writel(tmp, sif_base + U3P_U2FREQ_FMCR0);
188
189 /* ignore return value */
190 readl_poll_timeout(sif_base + U3P_U2FREQ_FMMONR1, tmp,
191 (tmp & P2F_USB_FM_VALID), 10, 200);
192
193 fm_out = readl(sif_base + U3P_U2FREQ_VALUE);
194
195 /* disable frequency meter */
196 tmp = readl(sif_base + U3P_U2FREQ_FMCR0);
197 tmp &= ~P2F_RG_FREQDET_EN;
198 writel(tmp, sif_base + U3P_U2FREQ_FMCR0);
199
200 /*disable free run clock */
201 tmp = readl(sif_base + U3P_U2FREQ_FMMONR1);
202 tmp &= ~P2F_RG_FRCK_EN;
203 writel(tmp, sif_base + U3P_U2FREQ_FMMONR1);
204
205 if (fm_out) {
206 /* ( 1024 / FM_OUT ) x reference clock frequency x 0.028 */
207 tmp = U3P_FM_DET_CYCLE_CNT * U3P_REF_CLK * U3P_SLEW_RATE_COEF;
208 tmp /= fm_out;
209 calibration_val = DIV_ROUND_CLOSEST(tmp, U3P_SR_COEF_DIVISOR);
210 } else {
211 /* if FM detection fail, set default value */
212 calibration_val = 4;
213 }
214 dev_dbg(u3phy->dev, "phy:%d, fm_out:%d, calib:%d\n",
215 instance->index, fm_out, calibration_val);
216
217 /* set HS slew rate */
218 tmp = readl(instance->port_base + U3P_USBPHYACR5);
219 tmp &= ~PA5_RG_U2_HSTX_SRCTRL;
220 tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(calibration_val);
221 writel(tmp, instance->port_base + U3P_USBPHYACR5);
222
223 /* disable USB ring oscillator */
224 tmp = readl(instance->port_base + U3P_USBPHYACR5);
225 tmp &= ~PA5_RG_U2_HSTX_SRCAL_EN;
226 writel(tmp, instance->port_base + U3P_USBPHYACR5);
227 }
228
229 static void phy_instance_init(struct mt65xx_u3phy *u3phy,
230 struct mt65xx_phy_instance *instance)
231 {
232 void __iomem *port_base = instance->port_base;
233 u32 index = instance->index;
234 u32 tmp;
235
236 /* switch to USB function. (system register, force ip into usb mode) */
237 tmp = readl(port_base + U3P_U2PHYDTM0);
238 tmp &= ~P2C_FORCE_UART_EN;
239 tmp |= P2C_RG_XCVRSEL_VAL(1) | P2C_RG_DATAIN_VAL(0);
240 writel(tmp, port_base + U3P_U2PHYDTM0);
241
242 tmp = readl(port_base + U3P_U2PHYDTM1);
243 tmp &= ~P2C_RG_UART_EN;
244 writel(tmp, port_base + U3P_U2PHYDTM1);
245
246 if (!index) {
247 tmp = readl(port_base + U3P_U2PHYACR4);
248 tmp &= ~P2C_U2_GPIO_CTR_MSK;
249 writel(tmp, port_base + U3P_U2PHYACR4);
250 }
251
252 if (u3phy->pdata->avoid_rx_sen_degradation) {
253 if (!index) {
254 tmp = readl(port_base + U3P_USBPHYACR2);
255 tmp |= PA2_RG_SIF_U2PLL_FORCE_EN;
256 writel(tmp, port_base + U3P_USBPHYACR2);
257
258 tmp = readl(port_base + U3D_U2PHYDCR0);
259 tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
260 writel(tmp, port_base + U3D_U2PHYDCR0);
261 } else {
262 tmp = readl(port_base + U3D_U2PHYDCR0);
263 tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
264 writel(tmp, port_base + U3D_U2PHYDCR0);
265
266 tmp = readl(port_base + U3P_U2PHYDTM0);
267 tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
268 writel(tmp, port_base + U3P_U2PHYDTM0);
269 }
270 }
271
272 tmp = readl(port_base + U3P_USBPHYACR6);
273 tmp &= ~PA6_RG_U2_BC11_SW_EN; /* DP/DM BC1.1 path Disable */
274 tmp &= ~PA6_RG_U2_SQTH;
275 tmp |= PA6_RG_U2_SQTH_VAL(2);
276 writel(tmp, port_base + U3P_USBPHYACR6);
277
278 tmp = readl(port_base + U3P_U3PHYA_DA_REG0);
279 tmp &= ~P3A_RG_XTAL_EXT_EN_U3;
280 tmp |= P3A_RG_XTAL_EXT_EN_U3_VAL(2);
281 writel(tmp, port_base + U3P_U3PHYA_DA_REG0);
282
283 tmp = readl(port_base + U3P_U3_PHYA_REG9);
284 tmp &= ~P3A_RG_RX_DAC_MUX;
285 tmp |= P3A_RG_RX_DAC_MUX_VAL(4);
286 writel(tmp, port_base + U3P_U3_PHYA_REG9);
287
288 tmp = readl(port_base + U3P_U3_PHYA_REG6);
289 tmp &= ~P3A_RG_TX_EIDLE_CM;
290 tmp |= P3A_RG_TX_EIDLE_CM_VAL(0xe);
291 writel(tmp, port_base + U3P_U3_PHYA_REG6);
292
293 tmp = readl(port_base + U3P_PHYD_CDR1);
294 tmp &= ~(P3D_RG_CDR_BIR_LTD0 | P3D_RG_CDR_BIR_LTD1);
295 tmp |= P3D_RG_CDR_BIR_LTD0_VAL(0xc) | P3D_RG_CDR_BIR_LTD1_VAL(0x3);
296 writel(tmp, port_base + U3P_PHYD_CDR1);
297
298 dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
299 }
300
301 static void phy_instance_power_on(struct mt65xx_u3phy *u3phy,
302 struct mt65xx_phy_instance *instance)
303 {
304 void __iomem *port_base = instance->port_base;
305 u32 index = instance->index;
306 u32 tmp;
307
308 if (!index) {
309 /* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */
310 tmp = readl(port_base + U3P_U3_PHYA_REG0);
311 tmp |= P3A_RG_U3_VUSB10_ON;
312 writel(tmp, port_base + U3P_U3_PHYA_REG0);
313 }
314
315 /* (force_suspendm=0) (let suspendm=1, enable usb 480MHz pll) */
316 tmp = readl(port_base + U3P_U2PHYDTM0);
317 tmp &= ~(P2C_FORCE_SUSPENDM | P2C_RG_XCVRSEL);
318 tmp &= ~(P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
319 writel(tmp, port_base + U3P_U2PHYDTM0);
320
321 /* OTG Enable */
322 tmp = readl(port_base + U3P_USBPHYACR6);
323 tmp |= PA6_RG_U2_OTG_VBUSCMP_EN;
324 writel(tmp, port_base + U3P_USBPHYACR6);
325
326 if (!index) {
327 tmp = readl(u3phy->sif_base + U3P_XTALCTL3);
328 tmp |= XC3_RG_U3_XTAL_RX_PWD | XC3_RG_U3_FRC_XTAL_RX_PWD;
329 writel(tmp, u3phy->sif_base + U3P_XTALCTL3);
330
331 /* switch 100uA current to SSUSB */
332 tmp = readl(port_base + U3P_USBPHYACR5);
333 tmp |= PA5_RG_U2_HS_100U_U3_EN;
334 writel(tmp, port_base + U3P_USBPHYACR5);
335 }
336
337 tmp = readl(port_base + U3P_U2PHYDTM1);
338 tmp |= P2C_RG_VBUSVALID | P2C_RG_AVALID;
339 tmp &= ~P2C_RG_SESSEND;
340 writel(tmp, port_base + U3P_U2PHYDTM1);
341
342 /* USB 2.0 slew rate calibration */
343 tmp = readl(port_base + U3P_USBPHYACR5);
344 tmp &= ~PA5_RG_U2_HSTX_SRCTRL;
345 tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(4);
346 writel(tmp, port_base + U3P_USBPHYACR5);
347
348 if (u3phy->pdata->avoid_rx_sen_degradation && index) {
349 tmp = readl(port_base + U3D_U2PHYDCR0);
350 tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
351 writel(tmp, port_base + U3D_U2PHYDCR0);
352
353 tmp = readl(port_base + U3P_U2PHYDTM0);
354 tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
355 writel(tmp, port_base + U3P_U2PHYDTM0);
356 }
357 dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
358 }
359
360 static void phy_instance_power_off(struct mt65xx_u3phy *u3phy,
361 struct mt65xx_phy_instance *instance)
362 {
363 void __iomem *port_base = instance->port_base;
364 u32 index = instance->index;
365 u32 tmp;
366
367 tmp = readl(port_base + U3P_U2PHYDTM0);
368 tmp &= ~(P2C_RG_XCVRSEL | P2C_RG_DATAIN);
369 tmp |= P2C_FORCE_SUSPENDM;
370 writel(tmp, port_base + U3P_U2PHYDTM0);
371
372 /* OTG Disable */
373 tmp = readl(port_base + U3P_USBPHYACR6);
374 tmp &= ~PA6_RG_U2_OTG_VBUSCMP_EN;
375 writel(tmp, port_base + U3P_USBPHYACR6);
376
377 if (!index) {
378 /* switch 100uA current back to USB2.0 */
379 tmp = readl(port_base + U3P_USBPHYACR5);
380 tmp &= ~PA5_RG_U2_HS_100U_U3_EN;
381 writel(tmp, port_base + U3P_USBPHYACR5);
382 }
383
384 /* let suspendm=0, set utmi into analog power down */
385 tmp = readl(port_base + U3P_U2PHYDTM0);
386 tmp &= ~P2C_RG_SUSPENDM;
387 writel(tmp, port_base + U3P_U2PHYDTM0);
388 udelay(1);
389
390 tmp = readl(port_base + U3P_U2PHYDTM1);
391 tmp &= ~(P2C_RG_VBUSVALID | P2C_RG_AVALID);
392 tmp |= P2C_RG_SESSEND;
393 writel(tmp, port_base + U3P_U2PHYDTM1);
394
395 if (!index) {
396 tmp = readl(port_base + U3P_U3_PHYA_REG0);
397 tmp &= ~P3A_RG_U3_VUSB10_ON;
398 writel(tmp, port_base + U3P_U3_PHYA_REG0);
399 }
400
401 if (u3phy->pdata->avoid_rx_sen_degradation && index) {
402 tmp = readl(port_base + U3D_U2PHYDCR0);
403 tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
404 writel(tmp, port_base + U3D_U2PHYDCR0);
405 }
406
407 dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
408 }
409
410 static void phy_instance_exit(struct mt65xx_u3phy *u3phy,
411 struct mt65xx_phy_instance *instance)
412 {
413 void __iomem *port_base = instance->port_base;
414 u32 index = instance->index;
415 u32 tmp;
416
417 if (u3phy->pdata->avoid_rx_sen_degradation && index) {
418 tmp = readl(port_base + U3D_U2PHYDCR0);
419 tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
420 writel(tmp, port_base + U3D_U2PHYDCR0);
421
422 tmp = readl(port_base + U3P_U2PHYDTM0);
423 tmp &= ~P2C_FORCE_SUSPENDM;
424 writel(tmp, port_base + U3P_U2PHYDTM0);
425 }
426 }
427
428 static int mt65xx_phy_init(struct phy *phy)
429 {
430 struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
431 struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
432 int ret;
433
434 ret = clk_prepare_enable(u3phy->u3phya_ref);
435 if (ret) {
436 dev_err(u3phy->dev, "failed to enable u3phya_ref\n");
437 return ret;
438 }
439
440 phy_instance_init(u3phy, instance);
441 return 0;
442 }
443
444 static int mt65xx_phy_power_on(struct phy *phy)
445 {
446 struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
447 struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
448
449 phy_instance_power_on(u3phy, instance);
450 hs_slew_rate_calibrate(u3phy, instance);
451 return 0;
452 }
453
454 static int mt65xx_phy_power_off(struct phy *phy)
455 {
456 struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
457 struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
458
459 phy_instance_power_off(u3phy, instance);
460 return 0;
461 }
462
463 static int mt65xx_phy_exit(struct phy *phy)
464 {
465 struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
466 struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
467
468 phy_instance_exit(u3phy, instance);
469 clk_disable_unprepare(u3phy->u3phya_ref);
470 return 0;
471 }
472
473 static struct phy *mt65xx_phy_xlate(struct device *dev,
474 struct of_phandle_args *args)
475 {
476 struct mt65xx_u3phy *u3phy = dev_get_drvdata(dev);
477 struct mt65xx_phy_instance *instance = NULL;
478 struct device_node *phy_np = args->np;
479 int index;
480
481
482 if (args->args_count != 1) {
483 dev_err(dev, "invalid number of cells in 'phy' property\n");
484 return ERR_PTR(-EINVAL);
485 }
486
487 for (index = 0; index < u3phy->nphys; index++)
488 if (phy_np == u3phy->phys[index]->phy->dev.of_node) {
489 instance = u3phy->phys[index];
490 break;
491 }
492
493 if (!instance) {
494 dev_err(dev, "failed to find appropriate phy\n");
495 return ERR_PTR(-EINVAL);
496 }
497
498 instance->type = args->args[0];
499
500 if (!(instance->type == PHY_TYPE_USB2 ||
501 instance->type == PHY_TYPE_USB3)) {
502 dev_err(dev, "unsupported device type: %d\n", instance->type);
503 return ERR_PTR(-EINVAL);
504 }
505
506 return instance->phy;
507 }
508
509 static struct phy_ops mt65xx_u3phy_ops = {
510 .init = mt65xx_phy_init,
511 .exit = mt65xx_phy_exit,
512 .power_on = mt65xx_phy_power_on,
513 .power_off = mt65xx_phy_power_off,
514 .owner = THIS_MODULE,
515 };
516
517 static const struct mt65xx_phy_pdata mt2701_pdata = {
518 .avoid_rx_sen_degradation = false,
519 };
520
521 static const struct mt65xx_phy_pdata mt8173_pdata = {
522 .avoid_rx_sen_degradation = true,
523 };
524
525 static const struct of_device_id mt65xx_u3phy_id_table[] = {
526 { .compatible = "mediatek,mt2701-u3phy", .data = &mt2701_pdata },
527 { .compatible = "mediatek,mt8173-u3phy", .data = &mt8173_pdata },
528 { },
529 };
530 MODULE_DEVICE_TABLE(of, mt65xx_u3phy_id_table);
531
532 static int mt65xx_u3phy_probe(struct platform_device *pdev)
533 {
534 const struct of_device_id *match;
535 struct device *dev = &pdev->dev;
536 struct device_node *np = dev->of_node;
537 struct device_node *child_np;
538 struct phy_provider *provider;
539 struct resource *sif_res;
540 struct mt65xx_u3phy *u3phy;
541 struct resource res;
542 int port, retval;
543
544 match = of_match_node(mt65xx_u3phy_id_table, pdev->dev.of_node);
545 if (!match)
546 return -EINVAL;
547
548 u3phy = devm_kzalloc(dev, sizeof(*u3phy), GFP_KERNEL);
549 if (!u3phy)
550 return -ENOMEM;
551
552 u3phy->pdata = match->data;
553 u3phy->nphys = of_get_child_count(np);
554 u3phy->phys = devm_kcalloc(dev, u3phy->nphys,
555 sizeof(*u3phy->phys), GFP_KERNEL);
556 if (!u3phy->phys)
557 return -ENOMEM;
558
559 u3phy->dev = dev;
560 platform_set_drvdata(pdev, u3phy);
561
562 sif_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
563 u3phy->sif_base = devm_ioremap_resource(dev, sif_res);
564 if (IS_ERR(u3phy->sif_base)) {
565 dev_err(dev, "failed to remap sif regs\n");
566 return PTR_ERR(u3phy->sif_base);
567 }
568
569 u3phy->u3phya_ref = devm_clk_get(dev, "u3phya_ref");
570 if (IS_ERR(u3phy->u3phya_ref)) {
571 dev_err(dev, "error to get u3phya_ref\n");
572 return PTR_ERR(u3phy->u3phya_ref);
573 }
574
575 port = 0;
576 for_each_child_of_node(np, child_np) {
577 struct mt65xx_phy_instance *instance;
578 struct phy *phy;
579
580 instance = devm_kzalloc(dev, sizeof(*instance), GFP_KERNEL);
581 if (!instance) {
582 retval = -ENOMEM;
583 goto put_child;
584 }
585
586 u3phy->phys[port] = instance;
587
588 phy = devm_phy_create(dev, child_np, &mt65xx_u3phy_ops);
589 if (IS_ERR(phy)) {
590 dev_err(dev, "failed to create phy\n");
591 retval = PTR_ERR(phy);
592 goto put_child;
593 }
594
595 retval = of_address_to_resource(child_np, 0, &res);
596 if (retval) {
597 dev_err(dev, "failed to get address resource(id-%d)\n",
598 port);
599 goto put_child;
600 }
601
602 instance->port_base = devm_ioremap_resource(&phy->dev, &res);
603 if (IS_ERR(instance->port_base)) {
604 dev_err(dev, "failed to remap phy regs\n");
605 retval = PTR_ERR(instance->port_base);
606 goto put_child;
607 }
608
609 instance->phy = phy;
610 instance->index = port;
611 phy_set_drvdata(phy, instance);
612 port++;
613 }
614
615 provider = devm_of_phy_provider_register(dev, mt65xx_phy_xlate);
616
617 return PTR_ERR_OR_ZERO(provider);
618 put_child:
619 of_node_put(child_np);
620 return retval;
621 }
622
623 static struct platform_driver mt65xx_u3phy_driver = {
624 .probe = mt65xx_u3phy_probe,
625 .driver = {
626 .name = "mt65xx-u3phy",
627 .of_match_table = mt65xx_u3phy_id_table,
628 },
629 };
630
631 module_platform_driver(mt65xx_u3phy_driver);
632
633 MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
634 MODULE_DESCRIPTION("mt65xx USB PHY driver");
635 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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