2 * Copyright (C) 2014 STMicroelectronics
4 * STMicroelectronics PHY driver MiPHY28lp (for SoC STiH407).
6 * Author: Alexandre Torgue <alexandre.torgue@st.com>
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.
14 #include <linux/platform_device.h>
16 #include <linux/kernel.h>
17 #include <linux/module.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>
28 #include <dt-bindings/phy/phy.h>
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)
36 #define MIPHY_RESET 0x01
37 #define RST_PLL_SW BIT(0)
38 #define RST_COMP_SW BIT(2)
40 #define MIPHY_STATUS_1 0x02
41 #define PHY_RDY BIT(0)
42 #define HFC_RDY BIT(1)
43 #define HFC_PLL BIT(2)
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)
51 #define MIPHY_BOUNDARY_SEL 0x0a
53 #define SSC_SEL BIT(4)
54 #define GENSEL_SEL BIT(0)
56 #define MIPHY_BOUNDARY_1 0x0b
57 #define MIPHY_BOUNDARY_2 0x0c
58 #define SSC_EN_SW BIT(2)
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)
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
83 #define MIPHY_COMP_FSM_1 0x3a
84 #define COMP_START BIT(6)
86 #define MIPHY_COMP_FSM_6 0x3f
87 #define COMP_DONE BIT(7)
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
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
103 #define MIPHY_TX_CTRL_3 0x4b
104 #define MIPHY_TX_CAL_MAN 0x4e
105 #define TX_SLEW_CAL_MAN_EN BIT(0)
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)
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
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)
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
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)
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)
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)
169 #define MIPHY_PLL_SPAREIN 0xeb
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.
179 #define MIPHY_OSC_FORCE_EXT BIT(3)
180 #define MIPHY_OSC_RDY BIT(5)
182 #define MIPHY_CTRL_MASK 0x0f
183 #define MIPHY_CTRL_DEFAULT 0
184 #define MIPHY_CTRL_SYNC_D_EN BIT(2)
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
194 struct miphy28lp_phy {
196 struct miphy28lp_dev *phydev;
198 void __iomem *pipebase;
204 struct reset_control *miphy_rst;
208 /* Sysconfig registers offsets needed to configure the device */
209 u32 syscfg_miphy_ctrl;
210 u32 syscfg_miphy_status;
216 struct miphy28lp_dev {
218 struct regmap *regmap;
219 struct mutex miphy_mutex;
220 struct miphy28lp_phy **phys;
223 struct miphy_initval {
228 enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 };
230 static char *PHY_TYPE_name[] = { "sata-up", "pcie-up", "", "usb3-up" };
241 static struct pll_ratio sata_pll_ratio = {
250 static struct pll_ratio pcie_pll_ratio = {
259 static struct pll_ratio usb3_pll_ratio = {
268 struct miphy28lp_pll_gen {
284 static struct miphy28lp_pll_gen sata_pll_gen[] = {
287 .speed = TX_SPDSEL_80DEC | RX_SPDSEL_80DEC,
288 .bias_boost_1 = 0x00,
289 .bias_boost_2 = 0xae,
292 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
294 .rx_equ_gain_1 = 0x7d,
295 .rx_equ_gain_2 = 0x56,
296 .rx_equ_gain_3 = 0x00,
300 .speed = TX_SPDSEL_40DEC | RX_SPDSEL_40DEC,
301 .bias_boost_1 = 0x00,
302 .bias_boost_2 = 0xae,
305 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
307 .rx_equ_gain_1 = 0x7d,
308 .rx_equ_gain_2 = 0x56,
309 .rx_equ_gain_3 = 0x00,
313 .speed = TX_SPDSEL_20DEC | RX_SPDSEL_20DEC,
314 .bias_boost_1 = 0x00,
315 .bias_boost_2 = 0xae,
318 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
320 .rx_equ_gain_1 = 0x7d,
321 .rx_equ_gain_2 = 0x56,
322 .rx_equ_gain_3 = 0x00,
326 static struct miphy28lp_pll_gen pcie_pll_gen[] = {
329 .speed = TX_SPDSEL_40DEC | RX_SPDSEL_40DEC,
330 .bias_boost_1 = 0x00,
331 .bias_boost_2 = 0xa5,
332 .tx_ctrl_1 = TX_REG_STEP_N_25MV,
336 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
338 .rx_equ_gain_1 = 0x79,
339 .rx_equ_gain_2 = 0x56,
343 .speed = TX_SPDSEL_20DEC | RX_SPDSEL_20DEC,
344 .bias_boost_1 = 0x00,
345 .bias_boost_2 = 0xa5,
346 .tx_ctrl_1 = TX_REG_STEP_N_25MV,
350 .rx_buff_ctrl = EQ_BOOST_GAIN | EQ_DC_GAIN | VGA_GAIN,
352 .rx_equ_gain_1 = 0x78,
353 .rx_equ_gain_2 = 0x07,
357 static inline void miphy28lp_set_reset(struct miphy28lp_phy *miphy_phy)
359 void *base = miphy_phy->base;
362 /* Putting Macro in reset */
363 writeb_relaxed(RST_APPLI_SW, base + MIPHY_CONF_RESET);
365 val = RST_APPLI_SW | RST_CONF_SW;
366 writeb_relaxed(val, base + MIPHY_CONF_RESET);
368 writeb_relaxed(RST_APPLI_SW, base + MIPHY_CONF_RESET);
370 /* Bringing the MIPHY-CPU registers out of reset */
371 if (miphy_phy->type == PHY_TYPE_PCIE) {
372 val = AUTO_RST_RX | TERM_EN_SW;
373 writeb_relaxed(val, base + MIPHY_CONTROL);
375 val = AUTO_RST_RX | TERM_EN_SW | DIS_LINK_RST;
376 writeb_relaxed(val, base + MIPHY_CONTROL);
380 static inline void miphy28lp_pll_calibration(struct miphy28lp_phy *miphy_phy,
381 struct pll_ratio *pll_ratio)
383 void *base = miphy_phy->base;
386 /* Applying PLL Settings */
387 writeb_relaxed(0x1d, base + MIPHY_PLL_SPAREIN);
388 writeb_relaxed(pll_ratio->clk_ref, base + MIPHY_PLL_CLKREF_FREQ);
391 writeb_relaxed(pll_ratio->calset_1, base + MIPHY_PLL_CALSET_1);
392 writeb_relaxed(pll_ratio->calset_2, base + MIPHY_PLL_CALSET_2);
393 writeb_relaxed(pll_ratio->calset_3, base + MIPHY_PLL_CALSET_3);
394 writeb_relaxed(pll_ratio->calset_4, base + MIPHY_PLL_CALSET_4);
395 writeb_relaxed(pll_ratio->cal_ctrl, base + MIPHY_PLL_CALSET_CTRL);
397 writeb_relaxed(TX_SEL, base + MIPHY_BOUNDARY_SEL);
399 val = (0x68 << 1) | TX_SLEW_CAL_MAN_EN;
400 writeb_relaxed(val, base + MIPHY_TX_CAL_MAN);
402 val = VGA_OFFSET_POLARITY | CAL_OFFSET_THRESHOLD_64 | CAL_OFFSET_VGA_64;
404 if (miphy_phy->type != PHY_TYPE_SATA)
405 val |= OFFSET_COMPENSATION_EN;
407 writeb_relaxed(val, base + MIPHY_RX_CAL_OFFSET_CTRL);
409 if (miphy_phy->type == PHY_TYPE_USB3) {
410 writeb_relaxed(0x00, base + MIPHY_CONF);
411 writeb_relaxed(0x70, base + MIPHY_RX_LOCK_STEP);
412 writeb_relaxed(EN_FIRST_HALF, base + MIPHY_RX_SIGDET_SLEEP_OA);
413 writeb_relaxed(EN_FIRST_HALF, base + MIPHY_RX_SIGDET_SLEEP_SEL);
414 writeb_relaxed(EN_FIRST_HALF, base + MIPHY_RX_SIGDET_WAIT_SEL);
416 val = EN_DIGIT_SIGNAL_CHECK | EN_FIRST_HALF;
417 writeb_relaxed(val, base + MIPHY_RX_SIGDET_DATA_SEL);
422 static inline void miphy28lp_sata_config_gen(struct miphy28lp_phy *miphy_phy)
424 void __iomem *base = miphy_phy->base;
427 for (i = 0; i < ARRAY_SIZE(sata_pll_gen); i++) {
428 struct miphy28lp_pll_gen *gen = &sata_pll_gen[i];
430 /* Banked settings */
431 writeb_relaxed(gen->bank, base + MIPHY_CONF);
432 writeb_relaxed(gen->speed, base + MIPHY_SPEED);
433 writeb_relaxed(gen->bias_boost_1, base + MIPHY_BIAS_BOOST_1);
434 writeb_relaxed(gen->bias_boost_2, base + MIPHY_BIAS_BOOST_2);
436 /* TX buffer Settings */
437 writeb_relaxed(gen->tx_ctrl_2, base + MIPHY_TX_CTRL_2);
438 writeb_relaxed(gen->tx_ctrl_3, base + MIPHY_TX_CTRL_3);
440 /* RX Buffer Settings */
441 writeb_relaxed(gen->rx_buff_ctrl, base + MIPHY_RX_BUFFER_CTRL);
442 writeb_relaxed(gen->rx_vga_gain, base + MIPHY_RX_VGA_GAIN);
443 writeb_relaxed(gen->rx_equ_gain_1, base + MIPHY_RX_EQU_GAIN_1);
444 writeb_relaxed(gen->rx_equ_gain_2, base + MIPHY_RX_EQU_GAIN_2);
445 writeb_relaxed(gen->rx_equ_gain_3, base + MIPHY_RX_EQU_GAIN_3);
449 static inline void miphy28lp_pcie_config_gen(struct miphy28lp_phy *miphy_phy)
451 void __iomem *base = miphy_phy->base;
454 for (i = 0; i < ARRAY_SIZE(pcie_pll_gen); i++) {
455 struct miphy28lp_pll_gen *gen = &pcie_pll_gen[i];
457 /* Banked settings */
458 writeb_relaxed(gen->bank, base + MIPHY_CONF);
459 writeb_relaxed(gen->speed, base + MIPHY_SPEED);
460 writeb_relaxed(gen->bias_boost_1, base + MIPHY_BIAS_BOOST_1);
461 writeb_relaxed(gen->bias_boost_2, base + MIPHY_BIAS_BOOST_2);
463 /* TX buffer Settings */
464 writeb_relaxed(gen->tx_ctrl_1, base + MIPHY_TX_CTRL_1);
465 writeb_relaxed(gen->tx_ctrl_2, base + MIPHY_TX_CTRL_2);
466 writeb_relaxed(gen->tx_ctrl_3, base + MIPHY_TX_CTRL_3);
468 writeb_relaxed(gen->rx_k_gain, base + MIPHY_RX_K_GAIN);
470 /* RX Buffer Settings */
471 writeb_relaxed(gen->rx_buff_ctrl, base + MIPHY_RX_BUFFER_CTRL);
472 writeb_relaxed(gen->rx_vga_gain, base + MIPHY_RX_VGA_GAIN);
473 writeb_relaxed(gen->rx_equ_gain_1, base + MIPHY_RX_EQU_GAIN_1);
474 writeb_relaxed(gen->rx_equ_gain_2, base + MIPHY_RX_EQU_GAIN_2);
478 static inline int miphy28lp_wait_compensation(struct miphy28lp_phy *miphy_phy)
480 unsigned long finish = jiffies + 5 * HZ;
483 /* Waiting for Compensation to complete */
485 val = readb_relaxed(miphy_phy->base + MIPHY_COMP_FSM_6);
487 if (time_after_eq(jiffies, finish))
490 } while (!(val & COMP_DONE));
496 static inline int miphy28lp_compensation(struct miphy28lp_phy *miphy_phy,
497 struct pll_ratio *pll_ratio)
499 void __iomem *base = miphy_phy->base;
501 /* Poll for HFC ready after reset release */
502 /* Compensation measurement */
503 writeb_relaxed(RST_PLL_SW | RST_COMP_SW, base + MIPHY_RESET);
505 writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2);
506 writeb_relaxed(pll_ratio->clk_ref, base + MIPHY_PLL_CLKREF_FREQ);
507 writeb_relaxed(COMP_START, base + MIPHY_COMP_FSM_1);
509 if (miphy_phy->type == PHY_TYPE_PCIE)
510 writeb_relaxed(RST_PLL_SW, base + MIPHY_RESET);
512 writeb_relaxed(0x00, base + MIPHY_RESET);
513 writeb_relaxed(START_ACT_FILT, base + MIPHY_PLL_COMMON_MISC_2);
514 writeb_relaxed(SET_NEW_CHANGE, base + MIPHY_PLL_SBR_1);
516 /* TX compensation offset to re-center TX impedance */
517 writeb_relaxed(0x00, base + MIPHY_COMP_POSTP);
519 if (miphy_phy->type == PHY_TYPE_PCIE)
520 return miphy28lp_wait_compensation(miphy_phy);
525 static inline void miphy28_usb3_miphy_reset(struct miphy28lp_phy *miphy_phy)
527 void __iomem *base = miphy_phy->base;
531 writeb_relaxed(RST_APPLI_SW, base + MIPHY_CONF_RESET);
532 writeb_relaxed(0x00, base + MIPHY_CONF_RESET);
533 writeb_relaxed(RST_COMP_SW, base + MIPHY_RESET);
535 val = RST_COMP_SW | RST_PLL_SW;
536 writeb_relaxed(val, base + MIPHY_RESET);
538 writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2);
539 writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ);
540 writeb_relaxed(COMP_START, base + MIPHY_COMP_FSM_1);
541 writeb_relaxed(RST_PLL_SW, base + MIPHY_RESET);
542 writeb_relaxed(0x00, base + MIPHY_RESET);
543 writeb_relaxed(START_ACT_FILT, base + MIPHY_PLL_COMMON_MISC_2);
544 writeb_relaxed(0x00, base + MIPHY_CONF);
545 writeb_relaxed(0x00, base + MIPHY_BOUNDARY_1);
546 writeb_relaxed(0x00, base + MIPHY_TST_BIAS_BOOST_2);
547 writeb_relaxed(0x00, base + MIPHY_CONF);
548 writeb_relaxed(SET_NEW_CHANGE, base + MIPHY_PLL_SBR_1);
549 writeb_relaxed(0xa5, base + MIPHY_DEBUG_BUS);
550 writeb_relaxed(0x00, base + MIPHY_CONF);
553 static inline int miphy28lp_configure_sata(struct miphy28lp_phy *miphy_phy)
555 void __iomem *base = miphy_phy->base;
559 /* Putting Macro in reset */
560 miphy28lp_set_reset(miphy_phy);
562 /* PLL calibration */
563 miphy28lp_pll_calibration(miphy_phy, &sata_pll_ratio);
565 /* Banked settings Gen1/Gen2/Gen3 */
566 miphy28lp_sata_config_gen(miphy_phy);
569 /* Input bridge enable, manual input bridge control */
570 writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1);
572 /* Macro out of reset */
573 writeb_relaxed(0x00, base + MIPHY_CONF_RESET);
575 /* Poll for HFC ready after reset release */
576 /* Compensation measurement */
577 err = miphy28lp_compensation(miphy_phy, &sata_pll_ratio);
581 if (miphy_phy->px_rx_pol_inv) {
582 /* Invert Rx polarity */
583 val = readb_relaxed(miphy_phy->base + MIPHY_CONTROL);
585 writeb_relaxed(val, miphy_phy->base + MIPHY_CONTROL);
591 static inline int miphy28lp_configure_pcie(struct miphy28lp_phy *miphy_phy)
593 void __iomem *base = miphy_phy->base;
596 /* Putting Macro in reset */
597 miphy28lp_set_reset(miphy_phy);
599 /* PLL calibration */
600 miphy28lp_pll_calibration(miphy_phy, &pcie_pll_ratio);
602 /* Banked settings Gen1/Gen2 */
603 miphy28lp_pcie_config_gen(miphy_phy);
606 /* Input bridge enable, manual input bridge control */
607 writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1);
609 /* Macro out of reset */
610 writeb_relaxed(0x00, base + MIPHY_CONF_RESET);
612 /* Poll for HFC ready after reset release */
613 /* Compensation measurement */
614 err = miphy28lp_compensation(miphy_phy, &pcie_pll_ratio);
622 static inline void miphy28lp_configure_usb3(struct miphy28lp_phy *miphy_phy)
624 void __iomem *base = miphy_phy->base;
627 /* Putting Macro in reset */
628 miphy28lp_set_reset(miphy_phy);
630 /* PLL calibration */
631 miphy28lp_pll_calibration(miphy_phy, &usb3_pll_ratio);
633 /* Writing The Speed Rate */
634 writeb_relaxed(0x00, base + MIPHY_CONF);
636 val = RX_SPDSEL_20DEC | TX_SPDSEL_20DEC;
637 writeb_relaxed(val, base + MIPHY_SPEED);
639 /* RX Channel compensation and calibration */
640 writeb_relaxed(0x1c, base + MIPHY_RX_LOCK_SETTINGS_OPT);
641 writeb_relaxed(0x51, base + MIPHY_RX_CAL_CTRL_1);
642 writeb_relaxed(0x70, base + MIPHY_RX_CAL_CTRL_2);
644 val = OFFSET_COMPENSATION_EN | VGA_OFFSET_POLARITY |
645 CAL_OFFSET_THRESHOLD_64 | CAL_OFFSET_VGA_64;
646 writeb_relaxed(val, base + MIPHY_RX_CAL_OFFSET_CTRL);
647 writeb_relaxed(0x22, base + MIPHY_RX_CAL_VGA_STEP);
648 writeb_relaxed(0x0e, base + MIPHY_RX_CAL_OPT_LENGTH);
650 val = EQ_DC_GAIN | VGA_GAIN;
651 writeb_relaxed(val, base + MIPHY_RX_BUFFER_CTRL);
652 writeb_relaxed(0x78, base + MIPHY_RX_EQU_GAIN_1);
653 writeb_relaxed(0x1b, base + MIPHY_SYNCHAR_CONTROL);
655 /* TX compensation offset to re-center TX impedance */
656 writeb_relaxed(0x02, base + MIPHY_COMP_POSTP);
658 /* Enable GENSEL_SEL and SSC */
659 /* TX_SEL=0 swing preemp forced by pipe registres */
660 val = SSC_SEL | GENSEL_SEL;
661 writeb_relaxed(val, base + MIPHY_BOUNDARY_SEL);
663 /* MIPHY Bias boost */
664 writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1);
665 writeb_relaxed(0xa7, base + MIPHY_BIAS_BOOST_2);
668 writeb_relaxed(SSC_EN_SW, base + MIPHY_BOUNDARY_2);
670 /* MIPHY TX control */
671 writeb_relaxed(0x00, base + MIPHY_CONF);
673 /* Validate Step component */
674 writeb_relaxed(0x5a, base + MIPHY_PLL_SBR_3);
675 writeb_relaxed(0xa0, base + MIPHY_PLL_SBR_4);
677 /* Validate Period component */
678 writeb_relaxed(0x3c, base + MIPHY_PLL_SBR_2);
679 writeb_relaxed(0xa1, base + MIPHY_PLL_SBR_4);
681 /* Clear any previous request */
682 writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1);
684 /* requests the PLL to take in account new parameters */
685 writeb_relaxed(0x02, base + MIPHY_PLL_SBR_1);
687 /* To be sure there is no other pending requests */
688 writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1);
690 /* Rx PI controller settings */
691 writeb_relaxed(0xca, base + MIPHY_RX_K_GAIN);
693 /* MIPHY RX input bridge control */
694 /* INPUT_BRIDGE_EN_SW=1, manual input bridge control[0]=1 */
695 writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1);
696 writeb_relaxed(0x29, base + MIPHY_RX_POWER_CTRL_1);
697 writeb_relaxed(0x1a, base + MIPHY_RX_POWER_CTRL_2);
699 /* MIPHY Reset for usb3 */
700 miphy28_usb3_miphy_reset(miphy_phy);
703 static inline int miphy_is_ready(struct miphy28lp_phy *miphy_phy)
705 unsigned long finish = jiffies + 5 * HZ;
706 u8 mask = HFC_PLL | HFC_RDY;
710 * For PCIe and USB3 check only that PLL and HFC are ready
711 * For SATA check also that phy is ready!
713 if (miphy_phy->type == PHY_TYPE_SATA)
717 val = readb_relaxed(miphy_phy->base + MIPHY_STATUS_1);
718 if ((val & mask) != mask)
722 } while (!time_after_eq(jiffies, finish));
727 static int miphy_osc_is_ready(struct miphy28lp_phy *miphy_phy)
729 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
730 unsigned long finish = jiffies + 5 * HZ;
733 if (!miphy_phy->osc_rdy)
736 if (!miphy_phy->syscfg_miphy_status)
740 regmap_read(miphy_dev->regmap, miphy_phy->syscfg_miphy_status,
743 if ((val & MIPHY_OSC_RDY) != MIPHY_OSC_RDY)
747 } while (!time_after_eq(jiffies, finish));
752 static int miphy28lp_get_resource_byname(struct device_node *child,
753 char *rname, struct resource *res)
757 index = of_property_match_string(child, "reg-names", rname);
761 return of_address_to_resource(child, index, res);
764 static int miphy28lp_get_one_addr(struct device *dev,
765 struct device_node *child, char *rname,
771 ret = miphy28lp_get_resource_byname(child, rname, &res);
773 *base = devm_ioremap(dev, res.start, resource_size(&res));
775 dev_err(dev, "failed to ioremap %s address region\n"
784 /* MiPHY reset and sysconf setup */
785 static int miphy28lp_setup(struct miphy28lp_phy *miphy_phy, u32 miphy_val)
788 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
790 if (!miphy_phy->syscfg_miphy_ctrl)
793 err = reset_control_assert(miphy_phy->miphy_rst);
795 dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n");
799 if (miphy_phy->osc_force_ext)
800 miphy_val |= MIPHY_OSC_FORCE_EXT;
802 regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_miphy_ctrl,
803 MIPHY_CTRL_MASK, miphy_val);
805 err = reset_control_deassert(miphy_phy->miphy_rst);
807 dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n");
811 return miphy_osc_is_ready(miphy_phy);
814 static int miphy28lp_init_sata(struct miphy28lp_phy *miphy_phy)
816 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
817 int err, sata_conf = SATA_CTRL_SELECT_SATA;
819 if ((!miphy_phy->syscfg_sata) || (!miphy_phy->syscfg_pci)
820 || (!miphy_phy->base))
823 dev_info(miphy_dev->dev, "sata-up mode, addr 0x%p\n", miphy_phy->base);
825 /* Configure the glue-logic */
826 sata_conf |= ((miphy_phy->sata_gen - SATA_GEN1) << SATA_SPDMODE);
828 regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_sata,
829 SATA_CTRL_MASK, sata_conf);
831 regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci,
832 PCIE_CTRL_MASK, SATA_CTRL_SELECT_PCIE);
834 /* MiPHY path and clocking init */
835 err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_DEFAULT);
838 dev_err(miphy_dev->dev, "SATA phy setup failed\n");
842 /* initialize miphy */
843 miphy28lp_configure_sata(miphy_phy);
845 return miphy_is_ready(miphy_phy);
848 static int miphy28lp_init_pcie(struct miphy28lp_phy *miphy_phy)
850 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
853 if ((!miphy_phy->syscfg_sata) || (!miphy_phy->syscfg_pci)
854 || (!miphy_phy->base) || (!miphy_phy->pipebase))
857 dev_info(miphy_dev->dev, "pcie-up mode, addr 0x%p\n", miphy_phy->base);
859 /* Configure the glue-logic */
860 regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_sata,
861 SATA_CTRL_MASK, SATA_CTRL_SELECT_PCIE);
863 regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci,
864 PCIE_CTRL_MASK, SYSCFG_PCIE_PCIE_VAL);
866 /* MiPHY path and clocking init */
867 err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_DEFAULT);
870 dev_err(miphy_dev->dev, "PCIe phy setup failed\n");
874 /* initialize miphy */
875 err = miphy28lp_configure_pcie(miphy_phy);
879 /* PIPE Wrapper Configuration */
880 writeb_relaxed(0x68, miphy_phy->pipebase + 0x104); /* Rise_0 */
881 writeb_relaxed(0x61, miphy_phy->pipebase + 0x105); /* Rise_1 */
882 writeb_relaxed(0x68, miphy_phy->pipebase + 0x108); /* Fall_0 */
883 writeb_relaxed(0x61, miphy_phy->pipebase + 0x109); /* Fall-1 */
884 writeb_relaxed(0x68, miphy_phy->pipebase + 0x10c); /* Threshold_0 */
885 writeb_relaxed(0x60, miphy_phy->pipebase + 0x10d); /* Threshold_1 */
887 /* Wait for phy_ready */
888 return miphy_is_ready(miphy_phy);
891 static int miphy28lp_init_usb3(struct miphy28lp_phy *miphy_phy)
893 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
896 if ((!miphy_phy->base) || (!miphy_phy->pipebase))
899 dev_info(miphy_dev->dev, "usb3-up mode, addr 0x%p\n", miphy_phy->base);
901 /* MiPHY path and clocking init */
902 err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_SYNC_D_EN);
904 dev_err(miphy_dev->dev, "USB3 phy setup failed\n");
908 /* initialize miphy */
909 miphy28lp_configure_usb3(miphy_phy);
911 /* PIPE Wrapper Configuration */
912 writeb_relaxed(0x68, miphy_phy->pipebase + 0x23);
913 writeb_relaxed(0x61, miphy_phy->pipebase + 0x24);
914 writeb_relaxed(0x68, miphy_phy->pipebase + 0x26);
915 writeb_relaxed(0x61, miphy_phy->pipebase + 0x27);
916 writeb_relaxed(0x18, miphy_phy->pipebase + 0x29);
917 writeb_relaxed(0x61, miphy_phy->pipebase + 0x2a);
919 /* pipe Wrapper usb3 TX swing de-emph margin PREEMPH[7:4], SWING[3:0] */
920 writeb_relaxed(0X67, miphy_phy->pipebase + 0x68);
921 writeb_relaxed(0x0d, miphy_phy->pipebase + 0x69);
922 writeb_relaxed(0X67, miphy_phy->pipebase + 0x6a);
923 writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6b);
924 writeb_relaxed(0X67, miphy_phy->pipebase + 0x6c);
925 writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6d);
926 writeb_relaxed(0X67, miphy_phy->pipebase + 0x6e);
927 writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6f);
929 return miphy_is_ready(miphy_phy);
932 static int miphy28lp_init(struct phy *phy)
934 struct miphy28lp_phy *miphy_phy = phy_get_drvdata(phy);
935 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
938 mutex_lock(&miphy_dev->miphy_mutex);
940 switch (miphy_phy->type) {
943 ret = miphy28lp_init_sata(miphy_phy);
946 ret = miphy28lp_init_pcie(miphy_phy);
949 ret = miphy28lp_init_usb3(miphy_phy);
955 mutex_unlock(&miphy_dev->miphy_mutex);
960 static int miphy28lp_get_addr(struct miphy28lp_phy *miphy_phy)
962 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
963 struct device_node *phynode = miphy_phy->phy->dev.of_node;
966 if ((miphy_phy->type != PHY_TYPE_SATA) &&
967 (miphy_phy->type != PHY_TYPE_PCIE) &&
968 (miphy_phy->type != PHY_TYPE_USB3)) {
972 err = miphy28lp_get_one_addr(miphy_dev->dev, phynode,
973 PHY_TYPE_name[miphy_phy->type - PHY_TYPE_SATA],
978 if ((miphy_phy->type == PHY_TYPE_PCIE) ||
979 (miphy_phy->type == PHY_TYPE_USB3)) {
980 err = miphy28lp_get_one_addr(miphy_dev->dev, phynode, "pipew",
981 &miphy_phy->pipebase);
989 static struct phy *miphy28lp_xlate(struct device *dev,
990 struct of_phandle_args *args)
992 struct miphy28lp_dev *miphy_dev = dev_get_drvdata(dev);
993 struct miphy28lp_phy *miphy_phy = NULL;
994 struct device_node *phynode = args->np;
997 if (!of_device_is_available(phynode)) {
998 dev_warn(dev, "Requested PHY is disabled\n");
999 return ERR_PTR(-ENODEV);
1002 if (args->args_count != 1) {
1003 dev_err(dev, "Invalid number of cells in 'phy' property\n");
1004 return ERR_PTR(-EINVAL);
1007 for (index = 0; index < of_get_child_count(dev->of_node); index++)
1008 if (phynode == miphy_dev->phys[index]->phy->dev.of_node) {
1009 miphy_phy = miphy_dev->phys[index];
1014 dev_err(dev, "Failed to find appropriate phy\n");
1015 return ERR_PTR(-EINVAL);
1018 miphy_phy->type = args->args[0];
1020 ret = miphy28lp_get_addr(miphy_phy);
1022 return ERR_PTR(ret);
1024 return miphy_phy->phy;
1027 static struct phy_ops miphy28lp_ops = {
1028 .init = miphy28lp_init,
1031 static int miphy28lp_probe_resets(struct device_node *node,
1032 struct miphy28lp_phy *miphy_phy)
1034 struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
1037 miphy_phy->miphy_rst = of_reset_control_get(node, "miphy-sw-rst");
1039 if (IS_ERR(miphy_phy->miphy_rst)) {
1040 dev_err(miphy_dev->dev,
1041 "miphy soft reset control not defined\n");
1042 return PTR_ERR(miphy_phy->miphy_rst);
1045 err = reset_control_deassert(miphy_phy->miphy_rst);
1047 dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n");
1054 static int miphy28lp_of_probe(struct device_node *np,
1055 struct miphy28lp_phy *miphy_phy)
1057 struct resource res;
1059 miphy_phy->osc_force_ext =
1060 of_property_read_bool(np, "st,osc-force-ext");
1062 miphy_phy->osc_rdy = of_property_read_bool(np, "st,osc-rdy");
1064 miphy_phy->px_rx_pol_inv =
1065 of_property_read_bool(np, "st,px_rx_pol_inv");
1067 of_property_read_u32(np, "st,sata-gen", &miphy_phy->sata_gen);
1068 if (!miphy_phy->sata_gen)
1069 miphy_phy->sata_gen = SATA_GEN1;
1071 if (!miphy28lp_get_resource_byname(np, "miphy-ctrl-glue", &res))
1072 miphy_phy->syscfg_miphy_ctrl = res.start;
1074 if (!miphy28lp_get_resource_byname(np, "miphy-status-glue", &res))
1075 miphy_phy->syscfg_miphy_status = res.start;
1077 if (!miphy28lp_get_resource_byname(np, "pcie-glue", &res))
1078 miphy_phy->syscfg_pci = res.start;
1080 if (!miphy28lp_get_resource_byname(np, "sata-glue", &res))
1081 miphy_phy->syscfg_sata = res.start;
1087 static int miphy28lp_probe(struct platform_device *pdev)
1089 struct device_node *child, *np = pdev->dev.of_node;
1090 struct miphy28lp_dev *miphy_dev;
1091 struct phy_provider *provider;
1093 int chancount, port = 0;
1096 miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL);
1100 chancount = of_get_child_count(np);
1101 miphy_dev->phys = devm_kzalloc(&pdev->dev, sizeof(phy) * chancount,
1103 if (!miphy_dev->phys)
1106 miphy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
1107 if (IS_ERR(miphy_dev->regmap)) {
1108 dev_err(miphy_dev->dev, "No syscfg phandle specified\n");
1109 return PTR_ERR(miphy_dev->regmap);
1112 miphy_dev->dev = &pdev->dev;
1114 dev_set_drvdata(&pdev->dev, miphy_dev);
1116 mutex_init(&miphy_dev->miphy_mutex);
1118 for_each_child_of_node(np, child) {
1119 struct miphy28lp_phy *miphy_phy;
1121 miphy_phy = devm_kzalloc(&pdev->dev, sizeof(*miphy_phy),
1126 miphy_dev->phys[port] = miphy_phy;
1128 phy = devm_phy_create(&pdev->dev, child, &miphy28lp_ops, NULL);
1130 dev_err(&pdev->dev, "failed to create PHY\n");
1131 return PTR_ERR(phy);
1134 miphy_dev->phys[port]->phy = phy;
1135 miphy_dev->phys[port]->phydev = miphy_dev;
1137 ret = miphy28lp_of_probe(child, miphy_phy);
1141 ret = miphy28lp_probe_resets(child, miphy_dev->phys[port]);
1145 phy_set_drvdata(phy, miphy_dev->phys[port]);
1150 provider = devm_of_phy_provider_register(&pdev->dev, miphy28lp_xlate);
1151 if (IS_ERR(provider))
1152 return PTR_ERR(provider);
1157 static const struct of_device_id miphy28lp_of_match[] = {
1158 {.compatible = "st,miphy28lp-phy", },
1162 MODULE_DEVICE_TABLE(of, miphy28lp_of_match);
1164 static struct platform_driver miphy28lp_driver = {
1165 .probe = miphy28lp_probe,
1167 .name = "miphy28lp-phy",
1168 .owner = THIS_MODULE,
1169 .of_match_table = miphy28lp_of_match,
1173 module_platform_driver(miphy28lp_driver);
1175 MODULE_AUTHOR("Alexandre Torgue <alexandre.torgue@st.com>");
1176 MODULE_DESCRIPTION("STMicroelectronics miphy28lp driver");
1177 MODULE_LICENSE("GPL v2");