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Linux 4.1.16
[linux/fpc-iii.git] / drivers / phy / phy-miphy28lp.c
blobc4cc11dcb2a237c16d801005fd0006a77140c139
1 /*
2 * Copyright (C) 2014 STMicroelectronics
3 *
4 * STMicroelectronics PHY driver MiPHY28lp (for SoC STiH407).
5 *
6 * Author: Alexandre Torgue <alexandre.torgue@st.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2, as
10 * published by the Free Software Foundation.
11 *
12 */
13
14 #include <linux/platform_device.h>
15 #include <linux/io.h>
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/of.h>
19 #include <linux/of_platform.h>
20 #include <linux/of_address.h>
21 #include <linux/clk.h>
22 #include <linux/phy/phy.h>
23 #include <linux/delay.h>
24 #include <linux/mfd/syscon.h>
25 #include <linux/regmap.h>
26 #include <linux/reset.h>
27
28 #include <dt-bindings/phy/phy.h>
29
30 /* MiPHY registers */
31 #define MIPHY_CONF_RESET 0x00
32 #define RST_APPLI_SW BIT(0)
33 #define RST_CONF_SW BIT(1)
34 #define RST_MACRO_SW BIT(2)
35
36 #define MIPHY_RESET 0x01
37 #define RST_PLL_SW BIT(0)
38 #define RST_COMP_SW BIT(2)
39
40 #define MIPHY_STATUS_1 0x02
41 #define PHY_RDY BIT(0)
42 #define HFC_RDY BIT(1)
43 #define HFC_PLL BIT(2)
44
45 #define MIPHY_CONTROL 0x04
46 #define TERM_EN_SW BIT(2)
47 #define DIS_LINK_RST BIT(3)
48 #define AUTO_RST_RX BIT(4)
49 #define PX_RX_POL BIT(5)
50
51 #define MIPHY_BOUNDARY_SEL 0x0a
52 #define TX_SEL BIT(6)
53 #define SSC_SEL BIT(4)
54 #define GENSEL_SEL BIT(0)
55
56 #define MIPHY_BOUNDARY_1 0x0b
57 #define MIPHY_BOUNDARY_2 0x0c
58 #define SSC_EN_SW BIT(2)
59
60 #define MIPHY_PLL_CLKREF_FREQ 0x0d
61 #define MIPHY_SPEED 0x0e
62 #define TX_SPDSEL_80DEC 0
63 #define TX_SPDSEL_40DEC 1
64 #define TX_SPDSEL_20DEC 2
65 #define RX_SPDSEL_80DEC 0
66 #define RX_SPDSEL_40DEC (1 << 2)
67 #define RX_SPDSEL_20DEC (2 << 2)
68
69 #define MIPHY_CONF 0x0f
70 #define MIPHY_CTRL_TEST_SEL 0x20
71 #define MIPHY_CTRL_TEST_1 0x21
72 #define MIPHY_CTRL_TEST_2 0x22
73 #define MIPHY_CTRL_TEST_3 0x23
74 #define MIPHY_CTRL_TEST_4 0x24
75 #define MIPHY_FEEDBACK_TEST 0x25
76 #define MIPHY_DEBUG_BUS 0x26
77 #define MIPHY_DEBUG_STATUS_MSB 0x27
78 #define MIPHY_DEBUG_STATUS_LSB 0x28
79 #define MIPHY_PWR_RAIL_1 0x29
80 #define MIPHY_PWR_RAIL_2 0x2a
81 #define MIPHY_SYNCHAR_CONTROL 0x30
82
83 #define MIPHY_COMP_FSM_1 0x3a
84 #define COMP_START BIT(6)
85
86 #define MIPHY_COMP_FSM_6 0x3f
87 #define COMP_DONE BIT(7)
88
89 #define MIPHY_COMP_POSTP 0x42
90 #define MIPHY_TX_CTRL_1 0x49
91 #define TX_REG_STEP_0V 0
92 #define TX_REG_STEP_P_25MV 1
93 #define TX_REG_STEP_P_50MV 2
94 #define TX_REG_STEP_N_25MV 7
95 #define TX_REG_STEP_N_50MV 6
96 #define TX_REG_STEP_N_75MV 5
97
98 #define MIPHY_TX_CTRL_2 0x4a
99 #define TX_SLEW_SW_40_PS 0
100 #define TX_SLEW_SW_80_PS 1
101 #define TX_SLEW_SW_120_PS 2
102
103 #define MIPHY_TX_CTRL_3 0x4b
104 #define MIPHY_TX_CAL_MAN 0x4e
105 #define TX_SLEW_CAL_MAN_EN BIT(0)
106
107 #define MIPHY_TST_BIAS_BOOST_2 0x62
108 #define MIPHY_BIAS_BOOST_1 0x63
109 #define MIPHY_BIAS_BOOST_2 0x64
110 #define MIPHY_RX_DESBUFF_FDB_2 0x67
111 #define MIPHY_RX_DESBUFF_FDB_3 0x68
112 #define MIPHY_SIGDET_COMPENS1 0x69
113 #define MIPHY_SIGDET_COMPENS2 0x6a
114 #define MIPHY_JITTER_PERIOD 0x6b
115 #define MIPHY_JITTER_AMPLITUDE_1 0x6c
116 #define MIPHY_JITTER_AMPLITUDE_2 0x6d
117 #define MIPHY_JITTER_AMPLITUDE_3 0x6e
118 #define MIPHY_RX_K_GAIN 0x78
119 #define MIPHY_RX_BUFFER_CTRL 0x7a
120 #define VGA_GAIN BIT(0)
121 #define EQ_DC_GAIN BIT(2)
122 #define EQ_BOOST_GAIN BIT(3)
123
124 #define MIPHY_RX_VGA_GAIN 0x7b
125 #define MIPHY_RX_EQU_GAIN_1 0x7f
126 #define MIPHY_RX_EQU_GAIN_2 0x80
127 #define MIPHY_RX_EQU_GAIN_3 0x81
128 #define MIPHY_RX_CAL_CTRL_1 0x97
129 #define MIPHY_RX_CAL_CTRL_2 0x98
130
131 #define MIPHY_RX_CAL_OFFSET_CTRL 0x99
132 #define CAL_OFFSET_VGA_64 (0x03 << 0)
133 #define CAL_OFFSET_THRESHOLD_64 (0x03 << 2)
134 #define VGA_OFFSET_POLARITY BIT(4)
135 #define OFFSET_COMPENSATION_EN BIT(6)
136
137 #define MIPHY_RX_CAL_VGA_STEP 0x9a
138 #define MIPHY_RX_CAL_EYE_MIN 0x9d
139 #define MIPHY_RX_CAL_OPT_LENGTH 0x9f
140 #define MIPHY_RX_LOCK_CTRL_1 0xc1
141 #define MIPHY_RX_LOCK_SETTINGS_OPT 0xc2
142 #define MIPHY_RX_LOCK_STEP 0xc4
143
144 #define MIPHY_RX_SIGDET_SLEEP_OA 0xc9
145 #define MIPHY_RX_SIGDET_SLEEP_SEL 0xca
146 #define MIPHY_RX_SIGDET_WAIT_SEL 0xcb
147 #define MIPHY_RX_SIGDET_DATA_SEL 0xcc
148 #define EN_ULTRA_LOW_POWER BIT(0)
149 #define EN_FIRST_HALF BIT(1)
150 #define EN_SECOND_HALF BIT(2)
151 #define EN_DIGIT_SIGNAL_CHECK BIT(3)
152
153 #define MIPHY_RX_POWER_CTRL_1 0xcd
154 #define MIPHY_RX_POWER_CTRL_2 0xce
155 #define MIPHY_PLL_CALSET_CTRL 0xd3
156 #define MIPHY_PLL_CALSET_1 0xd4
157 #define MIPHY_PLL_CALSET_2 0xd5
158 #define MIPHY_PLL_CALSET_3 0xd6
159 #define MIPHY_PLL_CALSET_4 0xd7
160 #define MIPHY_PLL_SBR_1 0xe3
161 #define SET_NEW_CHANGE BIT(1)
162
163 #define MIPHY_PLL_SBR_2 0xe4
164 #define MIPHY_PLL_SBR_3 0xe5
165 #define MIPHY_PLL_SBR_4 0xe6
166 #define MIPHY_PLL_COMMON_MISC_2 0xe9
167 #define START_ACT_FILT BIT(6)
168
169 #define MIPHY_PLL_SPAREIN 0xeb
170
171 /*
172 * On STiH407 the glue logic can be different among MiPHY devices; for example:
173 * MiPHY0: OSC_FORCE_EXT means:
174 * 0: 30MHz crystal clk - 1: 100MHz ext clk routed through MiPHY1
175 * MiPHY1: OSC_FORCE_EXT means:
176 * 1: 30MHz crystal clk - 0: 100MHz ext clk routed through MiPHY1
177 * Some devices have not the possibility to check if the osc is ready.
178 */
179 #define MIPHY_OSC_FORCE_EXT BIT(3)
180 #define MIPHY_OSC_RDY BIT(5)
181
182 #define MIPHY_CTRL_MASK 0x0f
183 #define MIPHY_CTRL_DEFAULT 0
184 #define MIPHY_CTRL_SYNC_D_EN BIT(2)
185
186 /* SATA / PCIe defines */
187 #define SATA_CTRL_MASK 0x07
188 #define PCIE_CTRL_MASK 0xff
189 #define SATA_CTRL_SELECT_SATA 1
190 #define SATA_CTRL_SELECT_PCIE 0
191 #define SYSCFG_PCIE_PCIE_VAL 0x80
192 #define SATA_SPDMODE 1
193
194 #define MIPHY_SATA_BANK_NB 3
195 #define MIPHY_PCIE_BANK_NB 2
196
197 enum {
198 SYSCFG_CTRL,
199 SYSCFG_STATUS,
200 SYSCFG_PCI,
201 SYSCFG_SATA,
202 SYSCFG_REG_MAX,
203 };
204
205 struct miphy28lp_phy {
206 struct phy *phy;
207 struct miphy28lp_dev *phydev;
208 void __iomem *base;
209 void __iomem *pipebase;
210
211 bool osc_force_ext;
212 bool osc_rdy;
213 bool px_rx_pol_inv;
214 bool ssc;
215 bool tx_impedance;
216
217 struct reset_control *miphy_rst;
218
219 u32 sata_gen;
220
221 /* Sysconfig registers offsets needed to configure the device */
222 u32 syscfg_reg[SYSCFG_REG_MAX];
223 u8 type;
224 };
225
226 struct miphy28lp_dev {
227 struct device *dev;
228 struct regmap *regmap;
229 struct mutex miphy_mutex;
230 struct miphy28lp_phy **phys;
231 int nphys;
232 };
233
234 struct miphy_initval {
235 u16 reg;
236 u16 val;
237 };
238
239 enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 };
240
241 static char *PHY_TYPE_name[] = { "sata-up", "pcie-up", "", "usb3-up" };
242
243 struct pll_ratio {
244 int clk_ref;
245 int calset_1;
246 int calset_2;
247 int calset_3;
248 int calset_4;
249 int cal_ctrl;
250 };
251
252 static struct pll_ratio sata_pll_ratio = {
253 .clk_ref = 0x1e,
254 .calset_1 = 0xc8,
255 .calset_2 = 0x00,
256 .calset_3 = 0x00,
257 .calset_4 = 0x00,
258 .cal_ctrl = 0x00,
259 };
260
261 static struct pll_ratio pcie_pll_ratio = {
262 .clk_ref = 0x1e,
263 .calset_1 = 0xa6,
264 .calset_2 = 0xaa,
265 .calset_3 = 0xaa,
266 .calset_4 = 0x00,
267 .cal_ctrl = 0x00,
268 };
269
270 static struct pll_ratio usb3_pll_ratio = {
271 .clk_ref = 0x1e,
272 .calset_1 = 0xa6,
273 .calset_2 = 0xaa,
274 .calset_3 = 0xaa,
275 .calset_4 = 0x04,
276 .cal_ctrl = 0x00,
277 };
278
279 struct miphy28lp_pll_gen {
280 int bank;
281 int speed;
282 int bias_boost_1;
283 int bias_boost_2;
284 int tx_ctrl_1;
285 int tx_ctrl_2;
286 int tx_ctrl_3;
287 int rx_k_gain;
288 int rx_vga_gain;
289 int rx_equ_gain_1;
290 int rx_equ_gain_2;
291 int rx_equ_gain_3;
292 int rx_buff_ctrl;
293 };
294
295 static struct miphy28lp_pll_gen sata_pll_gen[] = {
296 {
297 .bank = 0x00,
298 .speed = TX_SPDSEL_80DEC | RX_SPDSEL_80DEC,
299 .bias_boost_1 = 0x00,
300 .bias_boost_2 = 0xae,
301 .tx_ctrl_2 = 0x53,
302 .tx_ctrl_3 = 0x00,
303 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
304 .rx_vga_gain = 0x00,
305 .rx_equ_gain_1 = 0x7d,
306 .rx_equ_gain_2 = 0x56,
307 .rx_equ_gain_3 = 0x00,
308 },
309 {
310 .bank = 0x01,
311 .speed = TX_SPDSEL_40DEC | RX_SPDSEL_40DEC,
312 .bias_boost_1 = 0x00,
313 .bias_boost_2 = 0xae,
314 .tx_ctrl_2 = 0x72,
315 .tx_ctrl_3 = 0x20,
316 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
317 .rx_vga_gain = 0x00,
318 .rx_equ_gain_1 = 0x7d,
319 .rx_equ_gain_2 = 0x56,
320 .rx_equ_gain_3 = 0x00,
321 },
322 {
323 .bank = 0x02,
324 .speed = TX_SPDSEL_20DEC | RX_SPDSEL_20DEC,
325 .bias_boost_1 = 0x00,
326 .bias_boost_2 = 0xae,
327 .tx_ctrl_2 = 0xc0,
328 .tx_ctrl_3 = 0x20,
329 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
330 .rx_vga_gain = 0x00,
331 .rx_equ_gain_1 = 0x7d,
332 .rx_equ_gain_2 = 0x56,
333 .rx_equ_gain_3 = 0x00,
334 },
335 };
336
337 static struct miphy28lp_pll_gen pcie_pll_gen[] = {
338 {
339 .bank = 0x00,
340 .speed = TX_SPDSEL_40DEC | RX_SPDSEL_40DEC,
341 .bias_boost_1 = 0x00,
342 .bias_boost_2 = 0xa5,
343 .tx_ctrl_1 = TX_REG_STEP_N_25MV,
344 .tx_ctrl_2 = 0x71,
345 .tx_ctrl_3 = 0x60,
346 .rx_k_gain = 0x98,
347 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
348 .rx_vga_gain = 0x00,
349 .rx_equ_gain_1 = 0x79,
350 .rx_equ_gain_2 = 0x56,
351 },
352 {
353 .bank = 0x01,
354 .speed = TX_SPDSEL_20DEC | RX_SPDSEL_20DEC,
355 .bias_boost_1 = 0x00,
356 .bias_boost_2 = 0xa5,
357 .tx_ctrl_1 = TX_REG_STEP_N_25MV,
358 .tx_ctrl_2 = 0x70,
359 .tx_ctrl_3 = 0x60,
360 .rx_k_gain = 0xcc,
361 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
362 .rx_vga_gain = 0x00,
363 .rx_equ_gain_1 = 0x78,
364 .rx_equ_gain_2 = 0x07,
365 },
366 };
367
368 static inline void miphy28lp_set_reset(struct miphy28lp_phy *miphy_phy)
369 {
370 void *base = miphy_phy->base;
371 u8 val;
372
373 /* Putting Macro in reset */
374 writeb_relaxed(RST_APPLI_SW, base + MIPHY_CONF_RESET);
375
376 val = RST_APPLI_SW | RST_CONF_SW;
377 writeb_relaxed(val, base + MIPHY_CONF_RESET);
378
379 writeb_relaxed(RST_APPLI_SW, base + MIPHY_CONF_RESET);
380
381 /* Bringing the MIPHY-CPU registers out of reset */
382 if (miphy_phy->type == PHY_TYPE_PCIE) {
383 val = AUTO_RST_RX | TERM_EN_SW;
384 writeb_relaxed(val, base + MIPHY_CONTROL);
385 } else {
386 val = AUTO_RST_RX | TERM_EN_SW | DIS_LINK_RST;
387 writeb_relaxed(val, base + MIPHY_CONTROL);
388 }
389 }
390
391 static inline void miphy28lp_pll_calibration(struct miphy28lp_phy *miphy_phy,
392 struct pll_ratio *pll_ratio)
393 {
394 void *base = miphy_phy->base;
395 u8 val;
396
397 /* Applying PLL Settings */
398 writeb_relaxed(0x1d, base + MIPHY_PLL_SPAREIN);
399 writeb_relaxed(pll_ratio->clk_ref, base + MIPHY_PLL_CLKREF_FREQ);
400
401 /* PLL Ratio */
402 writeb_relaxed(pll_ratio->calset_1, base + MIPHY_PLL_CALSET_1);
403 writeb_relaxed(pll_ratio->calset_2, base + MIPHY_PLL_CALSET_2);
404 writeb_relaxed(pll_ratio->calset_3, base + MIPHY_PLL_CALSET_3);
405 writeb_relaxed(pll_ratio->calset_4, base + MIPHY_PLL_CALSET_4);
406 writeb_relaxed(pll_ratio->cal_ctrl, base + MIPHY_PLL_CALSET_CTRL);
407
408 writeb_relaxed(TX_SEL, base + MIPHY_BOUNDARY_SEL);
409
410 val = (0x68 << 1) | TX_SLEW_CAL_MAN_EN;
411 writeb_relaxed(val, base + MIPHY_TX_CAL_MAN);
412
413 val = VGA_OFFSET_POLARITY | CAL_OFFSET_THRESHOLD_64 | CAL_OFFSET_VGA_64;
414
415 if (miphy_phy->type != PHY_TYPE_SATA)
416 val |= OFFSET_COMPENSATION_EN;
417
418 writeb_relaxed(val, base + MIPHY_RX_CAL_OFFSET_CTRL);
419
420 if (miphy_phy->type == PHY_TYPE_USB3) {
421 writeb_relaxed(0x00, base + MIPHY_CONF);
422 writeb_relaxed(0x70, base + MIPHY_RX_LOCK_STEP);
423 writeb_relaxed(EN_FIRST_HALF, base + MIPHY_RX_SIGDET_SLEEP_OA);
424 writeb_relaxed(EN_FIRST_HALF, base + MIPHY_RX_SIGDET_SLEEP_SEL);
425 writeb_relaxed(EN_FIRST_HALF, base + MIPHY_RX_SIGDET_WAIT_SEL);
426
427 val = EN_DIGIT_SIGNAL_CHECK | EN_FIRST_HALF;
428 writeb_relaxed(val, base + MIPHY_RX_SIGDET_DATA_SEL);
429 }
430
431 }
432
433 static inline void miphy28lp_sata_config_gen(struct miphy28lp_phy *miphy_phy)
434 {
435 void __iomem *base = miphy_phy->base;
436 int i;
437
438 for (i = 0; i < ARRAY_SIZE(sata_pll_gen); i++) {
439 struct miphy28lp_pll_gen *gen = &sata_pll_gen[i];
440
441 /* Banked settings */
442 writeb_relaxed(gen->bank, base + MIPHY_CONF);
443 writeb_relaxed(gen->speed, base + MIPHY_SPEED);
444 writeb_relaxed(gen->bias_boost_1, base + MIPHY_BIAS_BOOST_1);
445 writeb_relaxed(gen->bias_boost_2, base + MIPHY_BIAS_BOOST_2);
446
447 /* TX buffer Settings */
448 writeb_relaxed(gen->tx_ctrl_2, base + MIPHY_TX_CTRL_2);
449 writeb_relaxed(gen->tx_ctrl_3, base + MIPHY_TX_CTRL_3);
450
451 /* RX Buffer Settings */
452 writeb_relaxed(gen->rx_buff_ctrl, base + MIPHY_RX_BUFFER_CTRL);
453 writeb_relaxed(gen->rx_vga_gain, base + MIPHY_RX_VGA_GAIN);
454 writeb_relaxed(gen->rx_equ_gain_1, base + MIPHY_RX_EQU_GAIN_1);
455 writeb_relaxed(gen->rx_equ_gain_2, base + MIPHY_RX_EQU_GAIN_2);
456 writeb_relaxed(gen->rx_equ_gain_3, base + MIPHY_RX_EQU_GAIN_3);
457 }
458 }
459
460 static inline void miphy28lp_pcie_config_gen(struct miphy28lp_phy *miphy_phy)
461 {
462 void __iomem *base = miphy_phy->base;
463 int i;
464
465 for (i = 0; i < ARRAY_SIZE(pcie_pll_gen); i++) {
466 struct miphy28lp_pll_gen *gen = &pcie_pll_gen[i];
467
468 /* Banked settings */
469 writeb_relaxed(gen->bank, base + MIPHY_CONF);
470 writeb_relaxed(gen->speed, base + MIPHY_SPEED);
471 writeb_relaxed(gen->bias_boost_1, base + MIPHY_BIAS_BOOST_1);
472 writeb_relaxed(gen->bias_boost_2, base + MIPHY_BIAS_BOOST_2);
473
474 /* TX buffer Settings */
475 writeb_relaxed(gen->tx_ctrl_1, base + MIPHY_TX_CTRL_1);
476 writeb_relaxed(gen->tx_ctrl_2, base + MIPHY_TX_CTRL_2);
477 writeb_relaxed(gen->tx_ctrl_3, base + MIPHY_TX_CTRL_3);
478
479 writeb_relaxed(gen->rx_k_gain, base + MIPHY_RX_K_GAIN);
480
481 /* RX Buffer Settings */
482 writeb_relaxed(gen->rx_buff_ctrl, base + MIPHY_RX_BUFFER_CTRL);
483 writeb_relaxed(gen->rx_vga_gain, base + MIPHY_RX_VGA_GAIN);
484 writeb_relaxed(gen->rx_equ_gain_1, base + MIPHY_RX_EQU_GAIN_1);
485 writeb_relaxed(gen->rx_equ_gain_2, base + MIPHY_RX_EQU_GAIN_2);
486 }
487 }
488
489 static inline int miphy28lp_wait_compensation(struct miphy28lp_phy *miphy_phy)
490 {
491 unsigned long finish = jiffies + 5 * HZ;
492 u8 val;
493
494 /* Waiting for Compensation to complete */
495 do {
496 val = readb_relaxed(miphy_phy->base + MIPHY_COMP_FSM_6);
497
498 if (time_after_eq(jiffies, finish))
499 return -EBUSY;
500 cpu_relax();
501 } while (!(val & COMP_DONE));
502
503 return 0;
504 }
505
506
507 static inline int miphy28lp_compensation(struct miphy28lp_phy *miphy_phy,
508 struct pll_ratio *pll_ratio)
509 {
510 void __iomem *base = miphy_phy->base;
511
512 /* Poll for HFC ready after reset release */
513 /* Compensation measurement */
514 writeb_relaxed(RST_PLL_SW | RST_COMP_SW, base + MIPHY_RESET);
515
516 writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2);
517 writeb_relaxed(pll_ratio->clk_ref, base + MIPHY_PLL_CLKREF_FREQ);
518 writeb_relaxed(COMP_START, base + MIPHY_COMP_FSM_1);
519
520 if (miphy_phy->type == PHY_TYPE_PCIE)
521 writeb_relaxed(RST_PLL_SW, base + MIPHY_RESET);
522
523 writeb_relaxed(0x00, base + MIPHY_RESET);
524 writeb_relaxed(START_ACT_FILT, base + MIPHY_PLL_COMMON_MISC_2);
525 writeb_relaxed(SET_NEW_CHANGE, base + MIPHY_PLL_SBR_1);
526
527 /* TX compensation offset to re-center TX impedance */
528 writeb_relaxed(0x00, base + MIPHY_COMP_POSTP);
529
530 if (miphy_phy->type == PHY_TYPE_PCIE)
531 return miphy28lp_wait_compensation(miphy_phy);
532
533 return 0;
534 }
535
536 static inline void miphy28_usb3_miphy_reset(struct miphy28lp_phy *miphy_phy)
537 {
538 void __iomem *base = miphy_phy->base;
539 u8 val;
540
541 /* MIPHY Reset */
542 writeb_relaxed(RST_APPLI_SW, base + MIPHY_CONF_RESET);
543 writeb_relaxed(0x00, base + MIPHY_CONF_RESET);
544 writeb_relaxed(RST_COMP_SW, base + MIPHY_RESET);
545
546 val = RST_COMP_SW | RST_PLL_SW;
547 writeb_relaxed(val, base + MIPHY_RESET);
548
549 writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2);
550 writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ);
551 writeb_relaxed(COMP_START, base + MIPHY_COMP_FSM_1);
552 writeb_relaxed(RST_PLL_SW, base + MIPHY_RESET);
553 writeb_relaxed(0x00, base + MIPHY_RESET);
554 writeb_relaxed(START_ACT_FILT, base + MIPHY_PLL_COMMON_MISC_2);
555 writeb_relaxed(0x00, base + MIPHY_CONF);
556 writeb_relaxed(0x00, base + MIPHY_BOUNDARY_1);
557 writeb_relaxed(0x00, base + MIPHY_TST_BIAS_BOOST_2);
558 writeb_relaxed(0x00, base + MIPHY_CONF);
559 writeb_relaxed(SET_NEW_CHANGE, base + MIPHY_PLL_SBR_1);
560 writeb_relaxed(0xa5, base + MIPHY_DEBUG_BUS);
561 writeb_relaxed(0x00, base + MIPHY_CONF);
562 }
563
564 static void miphy_sata_tune_ssc(struct miphy28lp_phy *miphy_phy)
565 {
566 void __iomem *base = miphy_phy->base;
567 u8 val;
568
569 /* Compensate Tx impedance to avoid out of range values */
570 /*
571 * Enable the SSC on PLL for all banks
572 * SSC Modulation @ 31 KHz and 4000 ppm modulation amp
573 */
574 val = readb_relaxed(base + MIPHY_BOUNDARY_2);
575 val |= SSC_EN_SW;
576 writeb_relaxed(val, base + MIPHY_BOUNDARY_2);
577
578 val = readb_relaxed(base + MIPHY_BOUNDARY_SEL);
579 val |= SSC_SEL;
580 writeb_relaxed(val, base + MIPHY_BOUNDARY_SEL);
581
582 for (val = 0; val < MIPHY_SATA_BANK_NB; val++) {
583 writeb_relaxed(val, base + MIPHY_CONF);
584
585 /* Add value to each reference clock cycle */
586 /* and define the period length of the SSC */
587 writeb_relaxed(0x3c, base + MIPHY_PLL_SBR_2);
588 writeb_relaxed(0x6c, base + MIPHY_PLL_SBR_3);
589 writeb_relaxed(0x81, base + MIPHY_PLL_SBR_4);
590
591 /* Clear any previous request */
592 writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1);
593
594 /* requests the PLL to take in account new parameters */
595 writeb_relaxed(SET_NEW_CHANGE, base + MIPHY_PLL_SBR_1);
596
597 /* To be sure there is no other pending requests */
598 writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1);
599 }
600 }
601
602 static void miphy_pcie_tune_ssc(struct miphy28lp_phy *miphy_phy)
603 {
604 void __iomem *base = miphy_phy->base;
605 u8 val;
606
607 /* Compensate Tx impedance to avoid out of range values */
608 /*
609 * Enable the SSC on PLL for all banks
610 * SSC Modulation @ 31 KHz and 4000 ppm modulation amp
611 */
612 val = readb_relaxed(base + MIPHY_BOUNDARY_2);
613 val |= SSC_EN_SW;
614 writeb_relaxed(val, base + MIPHY_BOUNDARY_2);
615
616 val = readb_relaxed(base + MIPHY_BOUNDARY_SEL);
617 val |= SSC_SEL;
618 writeb_relaxed(val, base + MIPHY_BOUNDARY_SEL);
619
620 for (val = 0; val < MIPHY_PCIE_BANK_NB; val++) {
621 writeb_relaxed(val, base + MIPHY_CONF);
622
623 /* Validate Step component */
624 writeb_relaxed(0x69, base + MIPHY_PLL_SBR_3);
625 writeb_relaxed(0x21, base + MIPHY_PLL_SBR_4);
626
627 /* Validate Period component */
628 writeb_relaxed(0x3c, base + MIPHY_PLL_SBR_2);
629 writeb_relaxed(0x21, base + MIPHY_PLL_SBR_4);
630
631 /* Clear any previous request */
632 writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1);
633
634 /* requests the PLL to take in account new parameters */
635 writeb_relaxed(SET_NEW_CHANGE, base + MIPHY_PLL_SBR_1);
636
637 /* To be sure there is no other pending requests */
638 writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1);
639 }
640 }
641
642 static inline void miphy_tune_tx_impedance(struct miphy28lp_phy *miphy_phy)
643 {
644 /* Compensate Tx impedance to avoid out of range values */
645 writeb_relaxed(0x02, miphy_phy->base + MIPHY_COMP_POSTP);
646 }
647
648 static inline int miphy28lp_configure_sata(struct miphy28lp_phy *miphy_phy)
649 {
650 void __iomem *base = miphy_phy->base;
651 int err;
652 u8 val;
653
654 /* Putting Macro in reset */
655 miphy28lp_set_reset(miphy_phy);
656
657 /* PLL calibration */
658 miphy28lp_pll_calibration(miphy_phy, &sata_pll_ratio);
659
660 /* Banked settings Gen1/Gen2/Gen3 */
661 miphy28lp_sata_config_gen(miphy_phy);
662
663 /* Power control */
664 /* Input bridge enable, manual input bridge control */
665 writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1);
666
667 /* Macro out of reset */
668 writeb_relaxed(0x00, base + MIPHY_CONF_RESET);
669
670 /* Poll for HFC ready after reset release */
671 /* Compensation measurement */
672 err = miphy28lp_compensation(miphy_phy, &sata_pll_ratio);
673 if (err)
674 return err;
675
676 if (miphy_phy->px_rx_pol_inv) {
677 /* Invert Rx polarity */
678 val = readb_relaxed(miphy_phy->base + MIPHY_CONTROL);
679 val |= PX_RX_POL;
680 writeb_relaxed(val, miphy_phy->base + MIPHY_CONTROL);
681 }
682
683 if (miphy_phy->ssc)
684 miphy_sata_tune_ssc(miphy_phy);
685
686 if (miphy_phy->tx_impedance)
687 miphy_tune_tx_impedance(miphy_phy);
688
689 return 0;
690 }
691
692 static inline int miphy28lp_configure_pcie(struct miphy28lp_phy *miphy_phy)
693 {
694 void __iomem *base = miphy_phy->base;
695 int err;
696
697 /* Putting Macro in reset */
698 miphy28lp_set_reset(miphy_phy);
699
700 /* PLL calibration */
701 miphy28lp_pll_calibration(miphy_phy, &pcie_pll_ratio);
702
703 /* Banked settings Gen1/Gen2 */
704 miphy28lp_pcie_config_gen(miphy_phy);
705
706 /* Power control */
707 /* Input bridge enable, manual input bridge control */
708 writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1);
709
710 /* Macro out of reset */
711 writeb_relaxed(0x00, base + MIPHY_CONF_RESET);
712
713 /* Poll for HFC ready after reset release */
714 /* Compensation measurement */
715 err = miphy28lp_compensation(miphy_phy, &pcie_pll_ratio);
716 if (err)
717 return err;
718
719 if (miphy_phy->ssc)
720 miphy_pcie_tune_ssc(miphy_phy);
721
722 if (miphy_phy->tx_impedance)
723 miphy_tune_tx_impedance(miphy_phy);
724
725 return 0;
726 }
727
728
729 static inline void miphy28lp_configure_usb3(struct miphy28lp_phy *miphy_phy)
730 {
731 void __iomem *base = miphy_phy->base;
732 u8 val;
733
734 /* Putting Macro in reset */
735 miphy28lp_set_reset(miphy_phy);
736
737 /* PLL calibration */
738 miphy28lp_pll_calibration(miphy_phy, &usb3_pll_ratio);
739
740 /* Writing The Speed Rate */
741 writeb_relaxed(0x00, base + MIPHY_CONF);
742
743 val = RX_SPDSEL_20DEC | TX_SPDSEL_20DEC;
744 writeb_relaxed(val, base + MIPHY_SPEED);
745
746 /* RX Channel compensation and calibration */
747 writeb_relaxed(0x1c, base + MIPHY_RX_LOCK_SETTINGS_OPT);
748 writeb_relaxed(0x51, base + MIPHY_RX_CAL_CTRL_1);
749 writeb_relaxed(0x70, base + MIPHY_RX_CAL_CTRL_2);
750
751 val = OFFSET_COMPENSATION_EN | VGA_OFFSET_POLARITY |
752 CAL_OFFSET_THRESHOLD_64 | CAL_OFFSET_VGA_64;
753 writeb_relaxed(val, base + MIPHY_RX_CAL_OFFSET_CTRL);
754 writeb_relaxed(0x22, base + MIPHY_RX_CAL_VGA_STEP);
755 writeb_relaxed(0x0e, base + MIPHY_RX_CAL_OPT_LENGTH);
756
757 val = EQ_DC_GAIN | VGA_GAIN;
758 writeb_relaxed(val, base + MIPHY_RX_BUFFER_CTRL);
759 writeb_relaxed(0x78, base + MIPHY_RX_EQU_GAIN_1);
760 writeb_relaxed(0x1b, base + MIPHY_SYNCHAR_CONTROL);
761
762 /* TX compensation offset to re-center TX impedance */
763 writeb_relaxed(0x02, base + MIPHY_COMP_POSTP);
764
765 /* Enable GENSEL_SEL and SSC */
766 /* TX_SEL=0 swing preemp forced by pipe registres */
767 val = SSC_SEL | GENSEL_SEL;
768 writeb_relaxed(val, base + MIPHY_BOUNDARY_SEL);
769
770 /* MIPHY Bias boost */
771 writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1);
772 writeb_relaxed(0xa7, base + MIPHY_BIAS_BOOST_2);
773
774 /* SSC modulation */
775 writeb_relaxed(SSC_EN_SW, base + MIPHY_BOUNDARY_2);
776
777 /* MIPHY TX control */
778 writeb_relaxed(0x00, base + MIPHY_CONF);
779
780 /* Validate Step component */
781 writeb_relaxed(0x5a, base + MIPHY_PLL_SBR_3);
782 writeb_relaxed(0xa0, base + MIPHY_PLL_SBR_4);
783
784 /* Validate Period component */
785 writeb_relaxed(0x3c, base + MIPHY_PLL_SBR_2);
786 writeb_relaxed(0xa1, base + MIPHY_PLL_SBR_4);
787
788 /* Clear any previous request */
789 writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1);
790
791 /* requests the PLL to take in account new parameters */
792 writeb_relaxed(0x02, base + MIPHY_PLL_SBR_1);
793
794 /* To be sure there is no other pending requests */
795 writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1);
796
797 /* Rx PI controller settings */
798 writeb_relaxed(0xca, base + MIPHY_RX_K_GAIN);
799
800 /* MIPHY RX input bridge control */
801 /* INPUT_BRIDGE_EN_SW=1, manual input bridge control[0]=1 */
802 writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1);
803 writeb_relaxed(0x29, base + MIPHY_RX_POWER_CTRL_1);
804 writeb_relaxed(0x1a, base + MIPHY_RX_POWER_CTRL_2);
805
806 /* MIPHY Reset for usb3 */
807 miphy28_usb3_miphy_reset(miphy_phy);
808 }
809
810 static inline int miphy_is_ready(struct miphy28lp_phy *miphy_phy)
811 {
812 unsigned long finish = jiffies + 5 * HZ;
813 u8 mask = HFC_PLL | HFC_RDY;
814 u8 val;
815
816 /*
817 * For PCIe and USB3 check only that PLL and HFC are ready
818 * For SATA check also that phy is ready!
819 */
820 if (miphy_phy->type == PHY_TYPE_SATA)
821 mask |= PHY_RDY;
822
823 do {
824 val = readb_relaxed(miphy_phy->base + MIPHY_STATUS_1);
825 if ((val & mask) != mask)
826 cpu_relax();
827 else
828 return 0;
829 } while (!time_after_eq(jiffies, finish));
830
831 return -EBUSY;
832 }
833
834 static int miphy_osc_is_ready(struct miphy28lp_phy *miphy_phy)
835 {
836 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
837 unsigned long finish = jiffies + 5 * HZ;
838 u32 val;
839
840 if (!miphy_phy->osc_rdy)
841 return 0;
842
843 if (!miphy_phy->syscfg_reg[SYSCFG_STATUS])
844 return -EINVAL;
845
846 do {
847 regmap_read(miphy_dev->regmap,
848 miphy_phy->syscfg_reg[SYSCFG_STATUS], &val);
849
850 if ((val & MIPHY_OSC_RDY) != MIPHY_OSC_RDY)
851 cpu_relax();
852 else
853 return 0;
854 } while (!time_after_eq(jiffies, finish));
855
856 return -EBUSY;
857 }
858
859 static int miphy28lp_get_resource_byname(struct device_node *child,
860 char *rname, struct resource *res)
861 {
862 int index;
863
864 index = of_property_match_string(child, "reg-names", rname);
865 if (index < 0)
866 return -ENODEV;
867
868 return of_address_to_resource(child, index, res);
869 }
870
871 static int miphy28lp_get_one_addr(struct device *dev,
872 struct device_node *child, char *rname,
873 void __iomem **base)
874 {
875 struct resource res;
876 int ret;
877
878 ret = miphy28lp_get_resource_byname(child, rname, &res);
879 if (!ret) {
880 *base = devm_ioremap(dev, res.start, resource_size(&res));
881 if (!*base) {
882 dev_err(dev, "failed to ioremap %s address region\n"
883 , rname);
884 return -ENOENT;
885 }
886 }
887
888 return 0;
889 }
890
891 /* MiPHY reset and sysconf setup */
892 static int miphy28lp_setup(struct miphy28lp_phy *miphy_phy, u32 miphy_val)
893 {
894 int err;
895 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
896
897 if (!miphy_phy->syscfg_reg[SYSCFG_CTRL])
898 return -EINVAL;
899
900 err = reset_control_assert(miphy_phy->miphy_rst);
901 if (err) {
902 dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n");
903 return err;
904 }
905
906 if (miphy_phy->osc_force_ext)
907 miphy_val |= MIPHY_OSC_FORCE_EXT;
908
909 regmap_update_bits(miphy_dev->regmap,
910 miphy_phy->syscfg_reg[SYSCFG_CTRL],
911 MIPHY_CTRL_MASK, miphy_val);
912
913 err = reset_control_deassert(miphy_phy->miphy_rst);
914 if (err) {
915 dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n");
916 return err;
917 }
918
919 return miphy_osc_is_ready(miphy_phy);
920 }
921
922 static int miphy28lp_init_sata(struct miphy28lp_phy *miphy_phy)
923 {
924 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
925 int err, sata_conf = SATA_CTRL_SELECT_SATA;
926
927 if ((!miphy_phy->syscfg_reg[SYSCFG_SATA]) ||
928 (!miphy_phy->syscfg_reg[SYSCFG_PCI]) ||
929 (!miphy_phy->base))
930 return -EINVAL;
931
932 dev_info(miphy_dev->dev, "sata-up mode, addr 0x%p\n", miphy_phy->base);
933
934 /* Configure the glue-logic */
935 sata_conf |= ((miphy_phy->sata_gen - SATA_GEN1) << SATA_SPDMODE);
936
937 regmap_update_bits(miphy_dev->regmap,
938 miphy_phy->syscfg_reg[SYSCFG_SATA],
939 SATA_CTRL_MASK, sata_conf);
940
941 regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_reg[SYSCFG_PCI],
942 PCIE_CTRL_MASK, SATA_CTRL_SELECT_PCIE);
943
944 /* MiPHY path and clocking init */
945 err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_DEFAULT);
946
947 if (err) {
948 dev_err(miphy_dev->dev, "SATA phy setup failed\n");
949 return err;
950 }
951
952 /* initialize miphy */
953 miphy28lp_configure_sata(miphy_phy);
954
955 return miphy_is_ready(miphy_phy);
956 }
957
958 static int miphy28lp_init_pcie(struct miphy28lp_phy *miphy_phy)
959 {
960 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
961 int err;
962
963 if ((!miphy_phy->syscfg_reg[SYSCFG_SATA]) ||
964 (!miphy_phy->syscfg_reg[SYSCFG_PCI])
965 || (!miphy_phy->base) || (!miphy_phy->pipebase))
966 return -EINVAL;
967
968 dev_info(miphy_dev->dev, "pcie-up mode, addr 0x%p\n", miphy_phy->base);
969
970 /* Configure the glue-logic */
971 regmap_update_bits(miphy_dev->regmap,
972 miphy_phy->syscfg_reg[SYSCFG_SATA],
973 SATA_CTRL_MASK, SATA_CTRL_SELECT_PCIE);
974
975 regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_reg[SYSCFG_PCI],
976 PCIE_CTRL_MASK, SYSCFG_PCIE_PCIE_VAL);
977
978 /* MiPHY path and clocking init */
979 err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_DEFAULT);
980
981 if (err) {
982 dev_err(miphy_dev->dev, "PCIe phy setup failed\n");
983 return err;
984 }
985
986 /* initialize miphy */
987 err = miphy28lp_configure_pcie(miphy_phy);
988 if (err)
989 return err;
990
991 /* PIPE Wrapper Configuration */
992 writeb_relaxed(0x68, miphy_phy->pipebase + 0x104); /* Rise_0 */
993 writeb_relaxed(0x61, miphy_phy->pipebase + 0x105); /* Rise_1 */
994 writeb_relaxed(0x68, miphy_phy->pipebase + 0x108); /* Fall_0 */
995 writeb_relaxed(0x61, miphy_phy->pipebase + 0x109); /* Fall-1 */
996 writeb_relaxed(0x68, miphy_phy->pipebase + 0x10c); /* Threshold_0 */
997 writeb_relaxed(0x60, miphy_phy->pipebase + 0x10d); /* Threshold_1 */
998
999 /* Wait for phy_ready */
1000 return miphy_is_ready(miphy_phy);
1001 }
1002
1003 static int miphy28lp_init_usb3(struct miphy28lp_phy *miphy_phy)
1004 {
1005 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
1006 int err;
1007
1008 if ((!miphy_phy->base) || (!miphy_phy->pipebase))
1009 return -EINVAL;
1010
1011 dev_info(miphy_dev->dev, "usb3-up mode, addr 0x%p\n", miphy_phy->base);
1012
1013 /* MiPHY path and clocking init */
1014 err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_SYNC_D_EN);
1015 if (err) {
1016 dev_err(miphy_dev->dev, "USB3 phy setup failed\n");
1017 return err;
1018 }
1019
1020 /* initialize miphy */
1021 miphy28lp_configure_usb3(miphy_phy);
1022
1023 /* PIPE Wrapper Configuration */
1024 writeb_relaxed(0x68, miphy_phy->pipebase + 0x23);
1025 writeb_relaxed(0x61, miphy_phy->pipebase + 0x24);
1026 writeb_relaxed(0x68, miphy_phy->pipebase + 0x26);
1027 writeb_relaxed(0x61, miphy_phy->pipebase + 0x27);
1028 writeb_relaxed(0x18, miphy_phy->pipebase + 0x29);
1029 writeb_relaxed(0x61, miphy_phy->pipebase + 0x2a);
1030
1031 /* pipe Wrapper usb3 TX swing de-emph margin PREEMPH[7:4], SWING[3:0] */
1032 writeb_relaxed(0X67, miphy_phy->pipebase + 0x68);
1033 writeb_relaxed(0x0d, miphy_phy->pipebase + 0x69);
1034 writeb_relaxed(0X67, miphy_phy->pipebase + 0x6a);
1035 writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6b);
1036 writeb_relaxed(0X67, miphy_phy->pipebase + 0x6c);
1037 writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6d);
1038 writeb_relaxed(0X67, miphy_phy->pipebase + 0x6e);
1039 writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6f);
1040
1041 return miphy_is_ready(miphy_phy);
1042 }
1043
1044 static int miphy28lp_init(struct phy *phy)
1045 {
1046 struct miphy28lp_phy *miphy_phy = phy_get_drvdata(phy);
1047 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
1048 int ret;
1049
1050 mutex_lock(&miphy_dev->miphy_mutex);
1051
1052 switch (miphy_phy->type) {
1053
1054 case PHY_TYPE_SATA:
1055 ret = miphy28lp_init_sata(miphy_phy);
1056 break;
1057 case PHY_TYPE_PCIE:
1058 ret = miphy28lp_init_pcie(miphy_phy);
1059 break;
1060 case PHY_TYPE_USB3:
1061 ret = miphy28lp_init_usb3(miphy_phy);
1062 break;
1063 default:
1064 ret = -EINVAL;
1065 break;
1066 }
1067
1068 mutex_unlock(&miphy_dev->miphy_mutex);
1069
1070 return ret;
1071 }
1072
1073 static int miphy28lp_get_addr(struct miphy28lp_phy *miphy_phy)
1074 {
1075 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
1076 struct device_node *phynode = miphy_phy->phy->dev.of_node;
1077 int err;
1078
1079 if ((miphy_phy->type != PHY_TYPE_SATA) &&
1080 (miphy_phy->type != PHY_TYPE_PCIE) &&
1081 (miphy_phy->type != PHY_TYPE_USB3)) {
1082 return -EINVAL;
1083 }
1084
1085 err = miphy28lp_get_one_addr(miphy_dev->dev, phynode,
1086 PHY_TYPE_name[miphy_phy->type - PHY_TYPE_SATA],
1087 &miphy_phy->base);
1088 if (err)
1089 return err;
1090
1091 if ((miphy_phy->type == PHY_TYPE_PCIE) ||
1092 (miphy_phy->type == PHY_TYPE_USB3)) {
1093 err = miphy28lp_get_one_addr(miphy_dev->dev, phynode, "pipew",
1094 &miphy_phy->pipebase);
1095 if (err)
1096 return err;
1097 }
1098
1099 return 0;
1100 }
1101
1102 static struct phy *miphy28lp_xlate(struct device *dev,
1103 struct of_phandle_args *args)
1104 {
1105 struct miphy28lp_dev *miphy_dev = dev_get_drvdata(dev);
1106 struct miphy28lp_phy *miphy_phy = NULL;
1107 struct device_node *phynode = args->np;
1108 int ret, index = 0;
1109
1110 if (!of_device_is_available(phynode)) {
1111 dev_warn(dev, "Requested PHY is disabled\n");
1112 return ERR_PTR(-ENODEV);
1113 }
1114
1115 if (args->args_count != 1) {
1116 dev_err(dev, "Invalid number of cells in 'phy' property\n");
1117 return ERR_PTR(-EINVAL);
1118 }
1119
1120 for (index = 0; index < miphy_dev->nphys; index++)
1121 if (phynode == miphy_dev->phys[index]->phy->dev.of_node) {
1122 miphy_phy = miphy_dev->phys[index];
1123 break;
1124 }
1125
1126 if (!miphy_phy) {
1127 dev_err(dev, "Failed to find appropriate phy\n");
1128 return ERR_PTR(-EINVAL);
1129 }
1130
1131 miphy_phy->type = args->args[0];
1132
1133 ret = miphy28lp_get_addr(miphy_phy);
1134 if (ret < 0)
1135 return ERR_PTR(ret);
1136
1137 return miphy_phy->phy;
1138 }
1139
1140 static struct phy_ops miphy28lp_ops = {
1141 .init = miphy28lp_init,
1142 .owner = THIS_MODULE,
1143 };
1144
1145 static int miphy28lp_probe_resets(struct device_node *node,
1146 struct miphy28lp_phy *miphy_phy)
1147 {
1148 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
1149 int err;
1150
1151 miphy_phy->miphy_rst = of_reset_control_get(node, "miphy-sw-rst");
1152
1153 if (IS_ERR(miphy_phy->miphy_rst)) {
1154 dev_err(miphy_dev->dev,
1155 "miphy soft reset control not defined\n");
1156 return PTR_ERR(miphy_phy->miphy_rst);
1157 }
1158
1159 err = reset_control_deassert(miphy_phy->miphy_rst);
1160 if (err) {
1161 dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n");
1162 return err;
1163 }
1164
1165 return 0;
1166 }
1167
1168 static int miphy28lp_of_probe(struct device_node *np,
1169 struct miphy28lp_phy *miphy_phy)
1170 {
1171 int i;
1172 u32 ctrlreg;
1173
1174 miphy_phy->osc_force_ext =
1175 of_property_read_bool(np, "st,osc-force-ext");
1176
1177 miphy_phy->osc_rdy = of_property_read_bool(np, "st,osc-rdy");
1178
1179 miphy_phy->px_rx_pol_inv =
1180 of_property_read_bool(np, "st,px_rx_pol_inv");
1181
1182 miphy_phy->ssc = of_property_read_bool(np, "st,ssc-on");
1183
1184 miphy_phy->tx_impedance =
1185 of_property_read_bool(np, "st,tx-impedance-comp");
1186
1187 of_property_read_u32(np, "st,sata-gen", &miphy_phy->sata_gen);
1188 if (!miphy_phy->sata_gen)
1189 miphy_phy->sata_gen = SATA_GEN1;
1190
1191 for (i = 0; i < SYSCFG_REG_MAX; i++) {
1192 if (!of_property_read_u32_index(np, "st,syscfg", i, &ctrlreg))
1193 miphy_phy->syscfg_reg[i] = ctrlreg;
1194 }
1195
1196 return 0;
1197 }
1198
1199 static int miphy28lp_probe(struct platform_device *pdev)
1200 {
1201 struct device_node *child, *np = pdev->dev.of_node;
1202 struct miphy28lp_dev *miphy_dev;
1203 struct phy_provider *provider;
1204 struct phy *phy;
1205 int ret, port = 0;
1206
1207 miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL);
1208 if (!miphy_dev)
1209 return -ENOMEM;
1210
1211 miphy_dev->nphys = of_get_child_count(np);
1212 miphy_dev->phys = devm_kcalloc(&pdev->dev, miphy_dev->nphys,
1213 sizeof(*miphy_dev->phys), GFP_KERNEL);
1214 if (!miphy_dev->phys)
1215 return -ENOMEM;
1216
1217 miphy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
1218 if (IS_ERR(miphy_dev->regmap)) {
1219 dev_err(miphy_dev->dev, "No syscfg phandle specified\n");
1220 return PTR_ERR(miphy_dev->regmap);
1221 }
1222
1223 miphy_dev->dev = &pdev->dev;
1224
1225 dev_set_drvdata(&pdev->dev, miphy_dev);
1226
1227 mutex_init(&miphy_dev->miphy_mutex);
1228
1229 for_each_child_of_node(np, child) {
1230 struct miphy28lp_phy *miphy_phy;
1231
1232 miphy_phy = devm_kzalloc(&pdev->dev, sizeof(*miphy_phy),
1233 GFP_KERNEL);
1234 if (!miphy_phy)
1235 return -ENOMEM;
1236
1237 miphy_dev->phys[port] = miphy_phy;
1238
1239 phy = devm_phy_create(&pdev->dev, child, &miphy28lp_ops);
1240 if (IS_ERR(phy)) {
1241 dev_err(&pdev->dev, "failed to create PHY\n");
1242 return PTR_ERR(phy);
1243 }
1244
1245 miphy_dev->phys[port]->phy = phy;
1246 miphy_dev->phys[port]->phydev = miphy_dev;
1247
1248 ret = miphy28lp_of_probe(child, miphy_phy);
1249 if (ret)
1250 return ret;
1251
1252 ret = miphy28lp_probe_resets(child, miphy_dev->phys[port]);
1253 if (ret)
1254 return ret;
1255
1256 phy_set_drvdata(phy, miphy_dev->phys[port]);
1257 port++;
1258
1259 }
1260
1261 provider = devm_of_phy_provider_register(&pdev->dev, miphy28lp_xlate);
1262 return PTR_ERR_OR_ZERO(provider);
1263 }
1264
1265 static const struct of_device_id miphy28lp_of_match[] = {
1266 {.compatible = "st,miphy28lp-phy", },
1267 {},
1268 };
1269
1270 MODULE_DEVICE_TABLE(of, miphy28lp_of_match);
1271
1272 static struct platform_driver miphy28lp_driver = {
1273 .probe = miphy28lp_probe,
1274 .driver = {
1275 .name = "miphy28lp-phy",
1276 .owner = THIS_MODULE,
1277 .of_match_table = miphy28lp_of_match,
1278 }
1279 };
1280
1281 module_platform_driver(miphy28lp_driver);
1282
1283 MODULE_AUTHOR("Alexandre Torgue <alexandre.torgue@st.com>");
1284 MODULE_DESCRIPTION("STMicroelectronics miphy28lp driver");
1285 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support