tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2017, The Linux Foundation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 */
14
15#include <linux/clk.h>
16#include <linux/clk-provider.h>
17#include <linux/delay.h>
18#include <linux/err.h>
19#include <linux/io.h>
20#include <linux/iopoll.h>
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/of.h>
24#include <linux/of_device.h>
25#include <linux/of_address.h>
26#include <linux/phy/phy.h>
27#include <linux/platform_device.h>
28#include <linux/regulator/consumer.h>
29#include <linux/reset.h>
30#include <linux/slab.h>
31
32#include <dt-bindings/phy/phy.h>
33
34/* QMP PHY QSERDES COM registers */
35#define QSERDES_COM_BG_TIMER 0x00c
36#define QSERDES_COM_SSC_EN_CENTER 0x010
37#define QSERDES_COM_SSC_ADJ_PER1 0x014
38#define QSERDES_COM_SSC_ADJ_PER2 0x018
39#define QSERDES_COM_SSC_PER1 0x01c
40#define QSERDES_COM_SSC_PER2 0x020
41#define QSERDES_COM_SSC_STEP_SIZE1 0x024
42#define QSERDES_COM_SSC_STEP_SIZE2 0x028
43#define QSERDES_COM_BIAS_EN_CLKBUFLR_EN 0x034
44#define QSERDES_COM_CLK_ENABLE1 0x038
45#define QSERDES_COM_SYS_CLK_CTRL 0x03c
46#define QSERDES_COM_SYSCLK_BUF_ENABLE 0x040
47#define QSERDES_COM_PLL_IVCO 0x048
48#define QSERDES_COM_LOCK_CMP1_MODE0 0x04c
49#define QSERDES_COM_LOCK_CMP2_MODE0 0x050
50#define QSERDES_COM_LOCK_CMP3_MODE0 0x054
51#define QSERDES_COM_LOCK_CMP1_MODE1 0x058
52#define QSERDES_COM_LOCK_CMP2_MODE1 0x05c
53#define QSERDES_COM_LOCK_CMP3_MODE1 0x060
54#define QSERDES_COM_BG_TRIM 0x070
55#define QSERDES_COM_CLK_EP_DIV 0x074
56#define QSERDES_COM_CP_CTRL_MODE0 0x078
57#define QSERDES_COM_CP_CTRL_MODE1 0x07c
58#define QSERDES_COM_PLL_RCTRL_MODE0 0x084
59#define QSERDES_COM_PLL_RCTRL_MODE1 0x088
60#define QSERDES_COM_PLL_CCTRL_MODE0 0x090
61#define QSERDES_COM_PLL_CCTRL_MODE1 0x094
62#define QSERDES_COM_BIAS_EN_CTRL_BY_PSM 0x0a8
63#define QSERDES_COM_SYSCLK_EN_SEL 0x0ac
64#define QSERDES_COM_RESETSM_CNTRL 0x0b4
65#define QSERDES_COM_RESTRIM_CTRL 0x0bc
66#define QSERDES_COM_RESCODE_DIV_NUM 0x0c4
67#define QSERDES_COM_LOCK_CMP_EN 0x0c8
68#define QSERDES_COM_LOCK_CMP_CFG 0x0cc
69#define QSERDES_COM_DEC_START_MODE0 0x0d0
70#define QSERDES_COM_DEC_START_MODE1 0x0d4
71#define QSERDES_COM_DIV_FRAC_START1_MODE0 0x0dc
72#define QSERDES_COM_DIV_FRAC_START2_MODE0 0x0e0
73#define QSERDES_COM_DIV_FRAC_START3_MODE0 0x0e4
74#define QSERDES_COM_DIV_FRAC_START1_MODE1 0x0e8
75#define QSERDES_COM_DIV_FRAC_START2_MODE1 0x0ec
76#define QSERDES_COM_DIV_FRAC_START3_MODE1 0x0f0
77#define QSERDES_COM_INTEGLOOP_GAIN0_MODE0 0x108
78#define QSERDES_COM_INTEGLOOP_GAIN1_MODE0 0x10c
79#define QSERDES_COM_INTEGLOOP_GAIN0_MODE1 0x110
80#define QSERDES_COM_INTEGLOOP_GAIN1_MODE1 0x114
81#define QSERDES_COM_VCO_TUNE_CTRL 0x124
82#define QSERDES_COM_VCO_TUNE_MAP 0x128
83#define QSERDES_COM_VCO_TUNE1_MODE0 0x12c
84#define QSERDES_COM_VCO_TUNE2_MODE0 0x130
85#define QSERDES_COM_VCO_TUNE1_MODE1 0x134
86#define QSERDES_COM_VCO_TUNE2_MODE1 0x138
87#define QSERDES_COM_VCO_TUNE_TIMER1 0x144
88#define QSERDES_COM_VCO_TUNE_TIMER2 0x148
89#define QSERDES_COM_BG_CTRL 0x170
90#define QSERDES_COM_CLK_SELECT 0x174
91#define QSERDES_COM_HSCLK_SEL 0x178
92#define QSERDES_COM_CORECLK_DIV 0x184
93#define QSERDES_COM_CORE_CLK_EN 0x18c
94#define QSERDES_COM_C_READY_STATUS 0x190
95#define QSERDES_COM_CMN_CONFIG 0x194
96#define QSERDES_COM_SVS_MODE_CLK_SEL 0x19c
97#define QSERDES_COM_DEBUG_BUS0 0x1a0
98#define QSERDES_COM_DEBUG_BUS1 0x1a4
99#define QSERDES_COM_DEBUG_BUS2 0x1a8
100#define QSERDES_COM_DEBUG_BUS3 0x1ac
101#define QSERDES_COM_DEBUG_BUS_SEL 0x1b0
102#define QSERDES_COM_CORECLK_DIV_MODE1 0x1bc
103
104/* QMP PHY TX registers */
105#define QSERDES_TX_RES_CODE_LANE_OFFSET 0x054
106#define QSERDES_TX_DEBUG_BUS_SEL 0x064
107#define QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN 0x068
108#define QSERDES_TX_LANE_MODE 0x094
109#define QSERDES_TX_RCV_DETECT_LVL_2 0x0ac
110
111/* QMP PHY RX registers */
112#define QSERDES_RX_UCDR_SO_GAIN_HALF 0x010
113#define QSERDES_RX_UCDR_SO_GAIN 0x01c
114#define QSERDES_RX_UCDR_FASTLOCK_FO_GAIN 0x040
115#define QSERDES_RX_UCDR_SO_SATURATION_AND_ENABLE 0x048
116#define QSERDES_RX_RX_TERM_BW 0x090
117#define QSERDES_RX_RX_EQ_GAIN1_LSB 0x0c4
118#define QSERDES_RX_RX_EQ_GAIN1_MSB 0x0c8
119#define QSERDES_RX_RX_EQ_GAIN2_LSB 0x0cc
120#define QSERDES_RX_RX_EQ_GAIN2_MSB 0x0d0
121#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2 0x0d8
122#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3 0x0dc
123#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4 0x0e0
124#define QSERDES_RX_RX_EQ_OFFSET_ADAPTOR_CNTRL1 0x108
125#define QSERDES_RX_RX_OFFSET_ADAPTOR_CNTRL2 0x10c
126#define QSERDES_RX_SIGDET_ENABLES 0x110
127#define QSERDES_RX_SIGDET_CNTRL 0x114
128#define QSERDES_RX_SIGDET_LVL 0x118
129#define QSERDES_RX_SIGDET_DEGLITCH_CNTRL 0x11c
130#define QSERDES_RX_RX_BAND 0x120
131#define QSERDES_RX_RX_INTERFACE_MODE 0x12c
132
133/* QMP PHY PCS registers */
134#define QPHY_POWER_DOWN_CONTROL 0x04
135#define QPHY_TXDEEMPH_M6DB_V0 0x24
136#define QPHY_TXDEEMPH_M3P5DB_V0 0x28
137#define QPHY_ENDPOINT_REFCLK_DRIVE 0x54
138#define QPHY_RX_IDLE_DTCT_CNTRL 0x58
139#define QPHY_POWER_STATE_CONFIG1 0x60
140#define QPHY_POWER_STATE_CONFIG2 0x64
141#define QPHY_POWER_STATE_CONFIG4 0x6c
142#define QPHY_LOCK_DETECT_CONFIG1 0x80
143#define QPHY_LOCK_DETECT_CONFIG2 0x84
144#define QPHY_LOCK_DETECT_CONFIG3 0x88
145#define QPHY_PWRUP_RESET_DLY_TIME_AUXCLK 0xa0
146#define QPHY_LP_WAKEUP_DLY_TIME_AUXCLK 0xa4
147#define QPHY_PLL_LOCK_CHK_DLY_TIME_AUXCLK_LSB 0x1A8
148#define QPHY_OSC_DTCT_ACTIONS 0x1AC
149#define QPHY_RX_SIGDET_LVL 0x1D8
150#define QPHY_L1SS_WAKEUP_DLY_TIME_AUXCLK_LSB 0x1DC
151#define QPHY_L1SS_WAKEUP_DLY_TIME_AUXCLK_MSB 0x1E0
152
153/* QPHY_SW_RESET bit */
154#define SW_RESET BIT(0)
155/* QPHY_POWER_DOWN_CONTROL */
156#define SW_PWRDN BIT(0)
157#define REFCLK_DRV_DSBL BIT(1)
158/* QPHY_START_CONTROL bits */
159#define SERDES_START BIT(0)
160#define PCS_START BIT(1)
161#define PLL_READY_GATE_EN BIT(3)
162/* QPHY_PCS_STATUS bit */
163#define PHYSTATUS BIT(6)
164/* QPHY_COM_PCS_READY_STATUS bit */
165#define PCS_READY BIT(0)
166
167#define PHY_INIT_COMPLETE_TIMEOUT 1000
168#define POWER_DOWN_DELAY_US_MIN 10
169#define POWER_DOWN_DELAY_US_MAX 11
170
171#define MAX_PROP_NAME 32
172
173struct qmp_phy_init_tbl {
174 unsigned int offset;
175 unsigned int val;
176 /*
177 * register part of layout ?
178 * if yes, then offset gives index in the reg-layout
179 */
180 int in_layout;
181};
182
183#define QMP_PHY_INIT_CFG(o, v) \
184 { \
185 .offset = o, \
186 .val = v, \
187 }
188
189#define QMP_PHY_INIT_CFG_L(o, v) \
190 { \
191 .offset = o, \
192 .val = v, \
193 .in_layout = 1, \
194 }
195
196/* set of registers with offsets different per-PHY */
197enum qphy_reg_layout {
198 /* Common block control registers */
199 QPHY_COM_SW_RESET,
200 QPHY_COM_POWER_DOWN_CONTROL,
201 QPHY_COM_START_CONTROL,
202 QPHY_COM_PCS_READY_STATUS,
203 /* PCS registers */
204 QPHY_PLL_LOCK_CHK_DLY_TIME,
205 QPHY_FLL_CNTRL1,
206 QPHY_FLL_CNTRL2,
207 QPHY_FLL_CNT_VAL_L,
208 QPHY_FLL_CNT_VAL_H_TOL,
209 QPHY_FLL_MAN_CODE,
210 QPHY_SW_RESET,
211 QPHY_START_CTRL,
212 QPHY_PCS_READY_STATUS,
213};
214
215static const unsigned int pciephy_regs_layout[] = {
216 [QPHY_COM_SW_RESET] = 0x400,
217 [QPHY_COM_POWER_DOWN_CONTROL] = 0x404,
218 [QPHY_COM_START_CONTROL] = 0x408,
219 [QPHY_COM_PCS_READY_STATUS] = 0x448,
220 [QPHY_PLL_LOCK_CHK_DLY_TIME] = 0xa8,
221 [QPHY_FLL_CNTRL1] = 0xc4,
222 [QPHY_FLL_CNTRL2] = 0xc8,
223 [QPHY_FLL_CNT_VAL_L] = 0xcc,
224 [QPHY_FLL_CNT_VAL_H_TOL] = 0xd0,
225 [QPHY_FLL_MAN_CODE] = 0xd4,
226 [QPHY_SW_RESET] = 0x00,
227 [QPHY_START_CTRL] = 0x08,
228 [QPHY_PCS_READY_STATUS] = 0x174,
229};
230
231static const unsigned int usb3phy_regs_layout[] = {
232 [QPHY_FLL_CNTRL1] = 0xc0,
233 [QPHY_FLL_CNTRL2] = 0xc4,
234 [QPHY_FLL_CNT_VAL_L] = 0xc8,
235 [QPHY_FLL_CNT_VAL_H_TOL] = 0xcc,
236 [QPHY_FLL_MAN_CODE] = 0xd0,
237 [QPHY_SW_RESET] = 0x00,
238 [QPHY_START_CTRL] = 0x08,
239 [QPHY_PCS_READY_STATUS] = 0x17c,
240};
241
242static const struct qmp_phy_init_tbl msm8996_pcie_serdes_tbl[] = {
243 QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x1c),
244 QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10),
245 QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x33),
246 QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x06),
247 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_EN, 0x42),
248 QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x00),
249 QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER1, 0xff),
250 QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER2, 0x1f),
251 QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x01),
252 QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x01),
253 QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x00),
254 QMP_PHY_INIT_CFG(QSERDES_COM_CORECLK_DIV, 0x0a),
255 QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0x09),
256 QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x82),
257 QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x03),
258 QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x55),
259 QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x55),
260 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x00),
261 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0x1a),
262 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0x0a),
263 QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x33),
264 QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x02),
265 QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_BUF_ENABLE, 0x1f),
266 QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x04),
267 QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0x0b),
268 QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16),
269 QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28),
270 QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN1_MODE0, 0x00),
271 QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80),
272 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x01),
273 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31),
274 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x01),
275 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x02),
276 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x00),
277 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0x2f),
278 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x19),
279 QMP_PHY_INIT_CFG(QSERDES_COM_RESCODE_DIV_NUM, 0x15),
280 QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0x0f),
281 QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0x0f),
282 QMP_PHY_INIT_CFG(QSERDES_COM_CLK_EP_DIV, 0x19),
283 QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10),
284 QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x00),
285 QMP_PHY_INIT_CFG(QSERDES_COM_RESCODE_DIV_NUM, 0x40),
286};
287
288static const struct qmp_phy_init_tbl msm8996_pcie_tx_tbl[] = {
289 QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45),
290 QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x06),
291};
292
293static const struct qmp_phy_init_tbl msm8996_pcie_rx_tbl[] = {
294 QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_ENABLES, 0x1c),
295 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x01),
296 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x00),
297 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xdb),
298 QMP_PHY_INIT_CFG(QSERDES_RX_RX_BAND, 0x18),
299 QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x04),
300 QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN_HALF, 0x04),
301 QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_SATURATION_AND_ENABLE, 0x4b),
302 QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x14),
303 QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_LVL, 0x19),
304};
305
306static const struct qmp_phy_init_tbl msm8996_pcie_pcs_tbl[] = {
307 QMP_PHY_INIT_CFG(QPHY_RX_IDLE_DTCT_CNTRL, 0x4c),
308 QMP_PHY_INIT_CFG(QPHY_PWRUP_RESET_DLY_TIME_AUXCLK, 0x00),
309 QMP_PHY_INIT_CFG(QPHY_LP_WAKEUP_DLY_TIME_AUXCLK, 0x01),
310
311 QMP_PHY_INIT_CFG_L(QPHY_PLL_LOCK_CHK_DLY_TIME, 0x05),
312
313 QMP_PHY_INIT_CFG(QPHY_ENDPOINT_REFCLK_DRIVE, 0x05),
314 QMP_PHY_INIT_CFG(QPHY_POWER_DOWN_CONTROL, 0x02),
315 QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG4, 0x00),
316 QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG1, 0xa3),
317 QMP_PHY_INIT_CFG(QPHY_TXDEEMPH_M3P5DB_V0, 0x0e),
318};
319
320static const struct qmp_phy_init_tbl msm8996_usb3_serdes_tbl[] = {
321 QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x14),
322 QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x08),
323 QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x30),
324 QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x06),
325 QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x01),
326 QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x00),
327 QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0x0f),
328 QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0x0f),
329 QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x04),
330 /* PLL and Loop filter settings */
331 QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x82),
332 QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x55),
333 QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x55),
334 QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x03),
335 QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0x0b),
336 QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16),
337 QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28),
338 QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80),
339 QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_CTRL, 0x00),
340 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0x15),
341 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0x34),
342 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x00),
343 QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x00),
344 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_CFG, 0x00),
345 QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x00),
346 QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0x0a),
347 /* SSC settings */
348 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x01),
349 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31),
350 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x01),
351 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x00),
352 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x00),
353 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0xde),
354 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x07),
355};
356
357static const struct qmp_phy_init_tbl msm8996_usb3_tx_tbl[] = {
358 QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45),
359 QMP_PHY_INIT_CFG(QSERDES_TX_RCV_DETECT_LVL_2, 0x12),
360 QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x06),
361};
362
363static const struct qmp_phy_init_tbl msm8996_usb3_rx_tbl[] = {
364 QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_FASTLOCK_FO_GAIN, 0x0b),
365 QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x04),
366 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x02),
367 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x4c),
368 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xbb),
369 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQ_OFFSET_ADAPTOR_CNTRL1, 0x77),
370 QMP_PHY_INIT_CFG(QSERDES_RX_RX_OFFSET_ADAPTOR_CNTRL2, 0x80),
371 QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_CNTRL, 0x03),
372 QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_LVL, 0x18),
373 QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x16),
374};
375
376static const struct qmp_phy_init_tbl msm8996_usb3_pcs_tbl[] = {
377 /* FLL settings */
378 QMP_PHY_INIT_CFG_L(QPHY_FLL_CNTRL2, 0x03),
379 QMP_PHY_INIT_CFG_L(QPHY_FLL_CNTRL1, 0x02),
380 QMP_PHY_INIT_CFG_L(QPHY_FLL_CNT_VAL_L, 0x09),
381 QMP_PHY_INIT_CFG_L(QPHY_FLL_CNT_VAL_H_TOL, 0x42),
382 QMP_PHY_INIT_CFG_L(QPHY_FLL_MAN_CODE, 0x85),
383
384 /* Lock Det settings */
385 QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG1, 0xd1),
386 QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG2, 0x1f),
387 QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG3, 0x47),
388 QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG2, 0x08),
389};
390
391static const struct qmp_phy_init_tbl ipq8074_pcie_serdes_tbl[] = {
392 QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x18),
393 QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10),
394 QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0xf),
395 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_EN, 0x1),
396 QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x0),
397 QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER1, 0x1f),
398 QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER2, 0x3f),
399 QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x6),
400 QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0xf),
401 QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x0),
402 QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x1),
403 QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x20),
404 QMP_PHY_INIT_CFG(QSERDES_COM_CORECLK_DIV, 0xa),
405 QMP_PHY_INIT_CFG(QSERDES_COM_RESETSM_CNTRL, 0x20),
406 QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0xa),
407 QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0xa),
408 QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x82),
409 QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x3),
410 QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x55),
411 QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x55),
412 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x0),
413 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0xD),
414 QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0xD04),
415 QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x33),
416 QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x2),
417 QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_BUF_ENABLE, 0x1f),
418 QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0xb),
419 QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16),
420 QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28),
421 QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN1_MODE0, 0x0),
422 QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80),
423 QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CTRL_BY_PSM, 0x1),
424 QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_CTRL, 0xa),
425 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x1),
426 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31),
427 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x1),
428 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x2),
429 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x0),
430 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0x2f),
431 QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x19),
432 QMP_PHY_INIT_CFG(QSERDES_COM_CLK_EP_DIV, 0x19),
433 QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_CNTRL, 0x7),
434};
435
436static const struct qmp_phy_init_tbl ipq8074_pcie_tx_tbl[] = {
437 QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45),
438 QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x6),
439 QMP_PHY_INIT_CFG(QSERDES_TX_RES_CODE_LANE_OFFSET, 0x2),
440 QMP_PHY_INIT_CFG(QSERDES_TX_RCV_DETECT_LVL_2, 0x12),
441};
442
443static const struct qmp_phy_init_tbl ipq8074_pcie_rx_tbl[] = {
444 QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_ENABLES, 0x1c),
445 QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x14),
446 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x1),
447 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x0),
448 QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xdb),
449 QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_SATURATION_AND_ENABLE, 0x4b),
450 QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x4),
451 QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN_HALF, 0x4),
452};
453
454static const struct qmp_phy_init_tbl ipq8074_pcie_pcs_tbl[] = {
455 QMP_PHY_INIT_CFG(QPHY_ENDPOINT_REFCLK_DRIVE, 0x4),
456 QMP_PHY_INIT_CFG(QPHY_OSC_DTCT_ACTIONS, 0x0),
457 QMP_PHY_INIT_CFG(QPHY_PWRUP_RESET_DLY_TIME_AUXCLK, 0x40),
458 QMP_PHY_INIT_CFG(QPHY_L1SS_WAKEUP_DLY_TIME_AUXCLK_MSB, 0x0),
459 QMP_PHY_INIT_CFG(QPHY_L1SS_WAKEUP_DLY_TIME_AUXCLK_LSB, 0x40),
460 QMP_PHY_INIT_CFG(QPHY_PLL_LOCK_CHK_DLY_TIME_AUXCLK_LSB, 0x0),
461 QMP_PHY_INIT_CFG(QPHY_LP_WAKEUP_DLY_TIME_AUXCLK, 0x40),
462 QMP_PHY_INIT_CFG_L(QPHY_PLL_LOCK_CHK_DLY_TIME, 0x73),
463 QMP_PHY_INIT_CFG(QPHY_RX_SIGDET_LVL, 0x99),
464 QMP_PHY_INIT_CFG(QPHY_TXDEEMPH_M6DB_V0, 0x15),
465 QMP_PHY_INIT_CFG(QPHY_TXDEEMPH_M3P5DB_V0, 0xe),
466 QMP_PHY_INIT_CFG_L(QPHY_SW_RESET, 0x0),
467 QMP_PHY_INIT_CFG_L(QPHY_START_CTRL, 0x3),
468};
469
470/* struct qmp_phy_cfg - per-PHY initialization config */
471struct qmp_phy_cfg {
472 /* phy-type - PCIE/UFS/USB */
473 unsigned int type;
474 /* number of lanes provided by phy */
475 int nlanes;
476
477 /* Init sequence for PHY blocks - serdes, tx, rx, pcs */
478 const struct qmp_phy_init_tbl *serdes_tbl;
479 int serdes_tbl_num;
480 const struct qmp_phy_init_tbl *tx_tbl;
481 int tx_tbl_num;
482 const struct qmp_phy_init_tbl *rx_tbl;
483 int rx_tbl_num;
484 const struct qmp_phy_init_tbl *pcs_tbl;
485 int pcs_tbl_num;
486
487 /* clock ids to be requested */
488 const char * const *clk_list;
489 int num_clks;
490 /* resets to be requested */
491 const char * const *reset_list;
492 int num_resets;
493 /* regulators to be requested */
494 const char * const *vreg_list;
495 int num_vregs;
496
497 /* array of registers with different offsets */
498 const unsigned int *regs;
499
500 unsigned int start_ctrl;
501 unsigned int pwrdn_ctrl;
502 unsigned int mask_pcs_ready;
503 unsigned int mask_com_pcs_ready;
504
505 /* true, if PHY has a separate PHY_COM control block */
506 bool has_phy_com_ctrl;
507 /* true, if PHY has a reset for individual lanes */
508 bool has_lane_rst;
509 /* true, if PHY needs delay after POWER_DOWN */
510 bool has_pwrdn_delay;
511 /* power_down delay in usec */
512 int pwrdn_delay_min;
513 int pwrdn_delay_max;
514};
515
516/**
517 * struct qmp_phy - per-lane phy descriptor
518 *
519 * @phy: generic phy
520 * @tx: iomapped memory space for lane's tx
521 * @rx: iomapped memory space for lane's rx
522 * @pcs: iomapped memory space for lane's pcs
523 * @pipe_clk: pipe lock
524 * @index: lane index
525 * @qmp: QMP phy to which this lane belongs
526 * @lane_rst: lane's reset controller
527 */
528struct qmp_phy {
529 struct phy *phy;
530 void __iomem *tx;
531 void __iomem *rx;
532 void __iomem *pcs;
533 struct clk *pipe_clk;
534 unsigned int index;
535 struct qcom_qmp *qmp;
536 struct reset_control *lane_rst;
537};
538
539/**
540 * struct qcom_qmp - structure holding QMP phy block attributes
541 *
542 * @dev: device
543 * @serdes: iomapped memory space for phy's serdes
544 *
545 * @clks: array of clocks required by phy
546 * @resets: array of resets required by phy
547 * @vregs: regulator supplies bulk data
548 *
549 * @cfg: phy specific configuration
550 * @phys: array of per-lane phy descriptors
551 * @phy_mutex: mutex lock for PHY common block initialization
552 * @init_count: phy common block initialization count
553 */
554struct qcom_qmp {
555 struct device *dev;
556 void __iomem *serdes;
557
558 struct clk **clks;
559 struct reset_control **resets;
560 struct regulator_bulk_data *vregs;
561
562 const struct qmp_phy_cfg *cfg;
563 struct qmp_phy **phys;
564
565 struct mutex phy_mutex;
566 int init_count;
567};
568
569static inline void qphy_setbits(void __iomem *base, u32 offset, u32 val)
570{
571 u32 reg;
572
573 reg = readl(base + offset);
574 reg |= val;
575 writel(reg, base + offset);
576
577 /* ensure that above write is through */
578 readl(base + offset);
579}
580
581static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
582{
583 u32 reg;
584
585 reg = readl(base + offset);
586 reg &= ~val;
587 writel(reg, base + offset);
588
589 /* ensure that above write is through */
590 readl(base + offset);
591}
592
593/* list of clocks required by phy */
594static const char * const msm8996_phy_clk_l[] = {
595 "aux", "cfg_ahb", "ref",
596};
597
598/* list of resets */
599static const char * const msm8996_pciephy_reset_l[] = {
600 "phy", "common", "cfg",
601};
602
603static const char * const msm8996_usb3phy_reset_l[] = {
604 "phy", "common",
605};
606
607/* list of regulators */
608static const char * const msm8996_phy_vreg_l[] = {
609 "vdda-phy", "vdda-pll",
610};
611
612static const struct qmp_phy_cfg msm8996_pciephy_cfg = {
613 .type = PHY_TYPE_PCIE,
614 .nlanes = 3,
615
616 .serdes_tbl = msm8996_pcie_serdes_tbl,
617 .serdes_tbl_num = ARRAY_SIZE(msm8996_pcie_serdes_tbl),
618 .tx_tbl = msm8996_pcie_tx_tbl,
619 .tx_tbl_num = ARRAY_SIZE(msm8996_pcie_tx_tbl),
620 .rx_tbl = msm8996_pcie_rx_tbl,
621 .rx_tbl_num = ARRAY_SIZE(msm8996_pcie_rx_tbl),
622 .pcs_tbl = msm8996_pcie_pcs_tbl,
623 .pcs_tbl_num = ARRAY_SIZE(msm8996_pcie_pcs_tbl),
624 .clk_list = msm8996_phy_clk_l,
625 .num_clks = ARRAY_SIZE(msm8996_phy_clk_l),
626 .reset_list = msm8996_pciephy_reset_l,
627 .num_resets = ARRAY_SIZE(msm8996_pciephy_reset_l),
628 .vreg_list = msm8996_phy_vreg_l,
629 .num_vregs = ARRAY_SIZE(msm8996_phy_vreg_l),
630 .regs = pciephy_regs_layout,
631
632 .start_ctrl = PCS_START | PLL_READY_GATE_EN,
633 .pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
634 .mask_com_pcs_ready = PCS_READY,
635
636 .has_phy_com_ctrl = true,
637 .has_lane_rst = true,
638 .has_pwrdn_delay = true,
639 .pwrdn_delay_min = POWER_DOWN_DELAY_US_MIN,
640 .pwrdn_delay_max = POWER_DOWN_DELAY_US_MAX,
641};
642
643static const struct qmp_phy_cfg msm8996_usb3phy_cfg = {
644 .type = PHY_TYPE_USB3,
645 .nlanes = 1,
646
647 .serdes_tbl = msm8996_usb3_serdes_tbl,
648 .serdes_tbl_num = ARRAY_SIZE(msm8996_usb3_serdes_tbl),
649 .tx_tbl = msm8996_usb3_tx_tbl,
650 .tx_tbl_num = ARRAY_SIZE(msm8996_usb3_tx_tbl),
651 .rx_tbl = msm8996_usb3_rx_tbl,
652 .rx_tbl_num = ARRAY_SIZE(msm8996_usb3_rx_tbl),
653 .pcs_tbl = msm8996_usb3_pcs_tbl,
654 .pcs_tbl_num = ARRAY_SIZE(msm8996_usb3_pcs_tbl),
655 .clk_list = msm8996_phy_clk_l,
656 .num_clks = ARRAY_SIZE(msm8996_phy_clk_l),
657 .reset_list = msm8996_usb3phy_reset_l,
658 .num_resets = ARRAY_SIZE(msm8996_usb3phy_reset_l),
659 .vreg_list = msm8996_phy_vreg_l,
660 .num_vregs = ARRAY_SIZE(msm8996_phy_vreg_l),
661 .regs = usb3phy_regs_layout,
662
663 .start_ctrl = SERDES_START | PCS_START,
664 .pwrdn_ctrl = SW_PWRDN,
665 .mask_pcs_ready = PHYSTATUS,
666};
667
668/* list of resets */
669static const char * const ipq8074_pciephy_reset_l[] = {
670 "phy", "common",
671};
672
673static const struct qmp_phy_cfg ipq8074_pciephy_cfg = {
674 .type = PHY_TYPE_PCIE,
675 .nlanes = 1,
676
677 .serdes_tbl = ipq8074_pcie_serdes_tbl,
678 .serdes_tbl_num = ARRAY_SIZE(ipq8074_pcie_serdes_tbl),
679 .tx_tbl = ipq8074_pcie_tx_tbl,
680 .tx_tbl_num = ARRAY_SIZE(ipq8074_pcie_tx_tbl),
681 .rx_tbl = ipq8074_pcie_rx_tbl,
682 .rx_tbl_num = ARRAY_SIZE(ipq8074_pcie_rx_tbl),
683 .pcs_tbl = ipq8074_pcie_pcs_tbl,
684 .pcs_tbl_num = ARRAY_SIZE(ipq8074_pcie_pcs_tbl),
685 .clk_list = NULL,
686 .num_clks = 0,
687 .reset_list = ipq8074_pciephy_reset_l,
688 .num_resets = ARRAY_SIZE(ipq8074_pciephy_reset_l),
689 .vreg_list = NULL,
690 .num_vregs = 0,
691 .regs = pciephy_regs_layout,
692
693 .start_ctrl = SERDES_START | PCS_START,
694 .pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
695 .mask_pcs_ready = PHYSTATUS,
696
697 .has_phy_com_ctrl = false,
698 .has_lane_rst = false,
699 .has_pwrdn_delay = true,
700 .pwrdn_delay_min = 995, /* us */
701 .pwrdn_delay_max = 1005, /* us */
702};
703
704static void qcom_qmp_phy_configure(void __iomem *base,
705 const unsigned int *regs,
706 const struct qmp_phy_init_tbl tbl[],
707 int num)
708{
709 int i;
710 const struct qmp_phy_init_tbl *t = tbl;
711
712 if (!t)
713 return;
714
715 for (i = 0; i < num; i++, t++) {
716 if (t->in_layout)
717 writel(t->val, base + regs[t->offset]);
718 else
719 writel(t->val, base + t->offset);
720 }
721}
722
723static int qcom_qmp_phy_poweron(struct phy *phy)
724{
725 struct qmp_phy *qphy = phy_get_drvdata(phy);
726 struct qcom_qmp *qmp = qphy->qmp;
727 int num = qmp->cfg->num_vregs;
728 int ret;
729
730 dev_vdbg(&phy->dev, "Powering on QMP phy\n");
731
732 /* turn on regulator supplies */
733 ret = regulator_bulk_enable(num, qmp->vregs);
734 if (ret) {
735 dev_err(qmp->dev, "failed to enable regulators, err=%d\n", ret);
736 return ret;
737 }
738
739 ret = clk_prepare_enable(qphy->pipe_clk);
740 if (ret) {
741 dev_err(qmp->dev, "pipe_clk enable failed, err=%d\n", ret);
742 regulator_bulk_disable(num, qmp->vregs);
743 return ret;
744 }
745
746 return 0;
747}
748
749static int qcom_qmp_phy_poweroff(struct phy *phy)
750{
751 struct qmp_phy *qphy = phy_get_drvdata(phy);
752 struct qcom_qmp *qmp = qphy->qmp;
753
754 clk_disable_unprepare(qphy->pipe_clk);
755
756 regulator_bulk_disable(qmp->cfg->num_vregs, qmp->vregs);
757
758 return 0;
759}
760
761static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
762{
763 const struct qmp_phy_cfg *cfg = qmp->cfg;
764 void __iomem *serdes = qmp->serdes;
765 int ret, i;
766
767 mutex_lock(&qmp->phy_mutex);
768 if (qmp->init_count++) {
769 mutex_unlock(&qmp->phy_mutex);
770 return 0;
771 }
772
773 for (i = 0; i < cfg->num_resets; i++) {
774 ret = reset_control_deassert(qmp->resets[i]);
775 if (ret) {
776 dev_err(qmp->dev, "%s reset deassert failed\n",
777 qmp->cfg->reset_list[i]);
778 goto err_rst;
779 }
780 }
781
782 if (cfg->has_phy_com_ctrl)
783 qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
784 SW_PWRDN);
785
786 /* Serdes configuration */
787 qcom_qmp_phy_configure(serdes, cfg->regs, cfg->serdes_tbl,
788 cfg->serdes_tbl_num);
789
790 if (cfg->has_phy_com_ctrl) {
791 void __iomem *status;
792 unsigned int mask, val;
793
794 qphy_clrbits(serdes, cfg->regs[QPHY_COM_SW_RESET], SW_RESET);
795 qphy_setbits(serdes, cfg->regs[QPHY_COM_START_CONTROL],
796 SERDES_START | PCS_START);
797
798 status = serdes + cfg->regs[QPHY_COM_PCS_READY_STATUS];
799 mask = cfg->mask_com_pcs_ready;
800
801 ret = readl_poll_timeout(status, val, (val & mask), 10,
802 PHY_INIT_COMPLETE_TIMEOUT);
803 if (ret) {
804 dev_err(qmp->dev,
805 "phy common block init timed-out\n");
806 goto err_rst;
807 }
808 }
809
810 mutex_unlock(&qmp->phy_mutex);
811
812 return 0;
813
814err_rst:
815 while (--i >= 0)
816 reset_control_assert(qmp->resets[i]);
817 mutex_unlock(&qmp->phy_mutex);
818
819 return ret;
820}
821
822static int qcom_qmp_phy_com_exit(struct qcom_qmp *qmp)
823{
824 const struct qmp_phy_cfg *cfg = qmp->cfg;
825 void __iomem *serdes = qmp->serdes;
826 int i = cfg->num_resets;
827
828 mutex_lock(&qmp->phy_mutex);
829 if (--qmp->init_count) {
830 mutex_unlock(&qmp->phy_mutex);
831 return 0;
832 }
833
834 if (cfg->has_phy_com_ctrl) {
835 qphy_setbits(serdes, cfg->regs[QPHY_COM_START_CONTROL],
836 SERDES_START | PCS_START);
837 qphy_clrbits(serdes, cfg->regs[QPHY_COM_SW_RESET],
838 SW_RESET);
839 qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
840 SW_PWRDN);
841 }
842
843 while (--i >= 0)
844 reset_control_assert(qmp->resets[i]);
845
846 mutex_unlock(&qmp->phy_mutex);
847
848 return 0;
849}
850
851/* PHY Initialization */
852static int qcom_qmp_phy_init(struct phy *phy)
853{
854 struct qmp_phy *qphy = phy_get_drvdata(phy);
855 struct qcom_qmp *qmp = qphy->qmp;
856 const struct qmp_phy_cfg *cfg = qmp->cfg;
857 void __iomem *tx = qphy->tx;
858 void __iomem *rx = qphy->rx;
859 void __iomem *pcs = qphy->pcs;
860 void __iomem *status;
861 unsigned int mask, val;
862 int ret, i;
863
864 dev_vdbg(qmp->dev, "Initializing QMP phy\n");
865
866 for (i = 0; i < qmp->cfg->num_clks; i++) {
867 ret = clk_prepare_enable(qmp->clks[i]);
868 if (ret) {
869 dev_err(qmp->dev, "failed to enable %s clk, err=%d\n",
870 qmp->cfg->clk_list[i], ret);
871 goto err_clk;
872 }
873 }
874
875 ret = qcom_qmp_phy_com_init(qmp);
876 if (ret)
877 goto err_clk;
878
879 if (cfg->has_lane_rst) {
880 ret = reset_control_deassert(qphy->lane_rst);
881 if (ret) {
882 dev_err(qmp->dev, "lane%d reset deassert failed\n",
883 qphy->index);
884 goto err_lane_rst;
885 }
886 }
887
888 /* Tx, Rx, and PCS configurations */
889 qcom_qmp_phy_configure(tx, cfg->regs, cfg->tx_tbl, cfg->tx_tbl_num);
890 qcom_qmp_phy_configure(rx, cfg->regs, cfg->rx_tbl, cfg->rx_tbl_num);
891 qcom_qmp_phy_configure(pcs, cfg->regs, cfg->pcs_tbl, cfg->pcs_tbl_num);
892
893 /*
894 * Pull out PHY from POWER DOWN state.
895 * This is active low enable signal to power-down PHY.
896 */
897 qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
898
899 if (cfg->has_pwrdn_delay)
900 usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
901
902 /* start SerDes and Phy-Coding-Sublayer */
903 qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
904
905 /* Pull PHY out of reset state */
906 qphy_clrbits(pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
907
908 status = pcs + cfg->regs[QPHY_PCS_READY_STATUS];
909 mask = cfg->mask_pcs_ready;
910
911 ret = readl_poll_timeout(status, val, !(val & mask), 1,
912 PHY_INIT_COMPLETE_TIMEOUT);
913 if (ret) {
914 dev_err(qmp->dev, "phy initialization timed-out\n");
915 goto err_pcs_ready;
916 }
917
918 return ret;
919
920err_pcs_ready:
921 if (cfg->has_lane_rst)
922 reset_control_assert(qphy->lane_rst);
923err_lane_rst:
924 qcom_qmp_phy_com_exit(qmp);
925err_clk:
926 while (--i >= 0)
927 clk_disable_unprepare(qmp->clks[i]);
928
929 return ret;
930}
931
932static int qcom_qmp_phy_exit(struct phy *phy)
933{
934 struct qmp_phy *qphy = phy_get_drvdata(phy);
935 struct qcom_qmp *qmp = qphy->qmp;
936 const struct qmp_phy_cfg *cfg = qmp->cfg;
937 int i = cfg->num_clks;
938
939 /* PHY reset */
940 qphy_setbits(qphy->pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
941
942 /* stop SerDes and Phy-Coding-Sublayer */
943 qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
944
945 /* Put PHY into POWER DOWN state: active low */
946 qphy_clrbits(qphy->pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
947
948 if (cfg->has_lane_rst)
949 reset_control_assert(qphy->lane_rst);
950
951 qcom_qmp_phy_com_exit(qmp);
952
953 while (--i >= 0)
954 clk_disable_unprepare(qmp->clks[i]);
955
956 return 0;
957}
958
959static int qcom_qmp_phy_vreg_init(struct device *dev)
960{
961 struct qcom_qmp *qmp = dev_get_drvdata(dev);
962 int num = qmp->cfg->num_vregs;
963 int i;
964
965 qmp->vregs = devm_kcalloc(dev, num, sizeof(*qmp->vregs), GFP_KERNEL);
966 if (!qmp->vregs)
967 return -ENOMEM;
968
969 for (i = 0; i < num; i++)
970 qmp->vregs[i].supply = qmp->cfg->vreg_list[i];
971
972 return devm_regulator_bulk_get(dev, num, qmp->vregs);
973}
974
975static int qcom_qmp_phy_reset_init(struct device *dev)
976{
977 struct qcom_qmp *qmp = dev_get_drvdata(dev);
978 int i;
979
980 qmp->resets = devm_kcalloc(dev, qmp->cfg->num_resets,
981 sizeof(*qmp->resets), GFP_KERNEL);
982 if (!qmp->resets)
983 return -ENOMEM;
984
985 for (i = 0; i < qmp->cfg->num_resets; i++) {
986 struct reset_control *rst;
987 const char *name = qmp->cfg->reset_list[i];
988
989 rst = devm_reset_control_get(dev, name);
990 if (IS_ERR(rst)) {
991 dev_err(dev, "failed to get %s reset\n", name);
992 return PTR_ERR(rst);
993 }
994 qmp->resets[i] = rst;
995 }
996
997 return 0;
998}
999
1000static int qcom_qmp_phy_clk_init(struct device *dev)
1001{
1002 struct qcom_qmp *qmp = dev_get_drvdata(dev);
1003 int ret, i;
1004
1005 qmp->clks = devm_kcalloc(dev, qmp->cfg->num_clks,
1006 sizeof(*qmp->clks), GFP_KERNEL);
1007 if (!qmp->clks)
1008 return -ENOMEM;
1009
1010 for (i = 0; i < qmp->cfg->num_clks; i++) {
1011 struct clk *_clk;
1012 const char *name = qmp->cfg->clk_list[i];
1013
1014 _clk = devm_clk_get(dev, name);
1015 if (IS_ERR(_clk)) {
1016 ret = PTR_ERR(_clk);
1017 if (ret != -EPROBE_DEFER)
1018 dev_err(dev, "failed to get %s clk, %d\n",
1019 name, ret);
1020 return ret;
1021 }
1022 qmp->clks[i] = _clk;
1023 }
1024
1025 return 0;
1026}
1027
1028/*
1029 * Register a fixed rate pipe clock.
1030 *
1031 * The <s>_pipe_clksrc generated by PHY goes to the GCC that gate
1032 * controls it. The <s>_pipe_clk coming out of the GCC is requested
1033 * by the PHY driver for its operations.
1034 * We register the <s>_pipe_clksrc here. The gcc driver takes care
1035 * of assigning this <s>_pipe_clksrc as parent to <s>_pipe_clk.
1036 * Below picture shows this relationship.
1037 *
1038 * +---------------+
1039 * | PHY block |<<---------------------------------------+
1040 * | | |
1041 * | +-------+ | +-----+ |
1042 * I/P---^-->| PLL |---^--->pipe_clksrc--->| GCC |--->pipe_clk---+
1043 * clk | +-------+ | +-----+
1044 * +---------------+
1045 */
1046static int phy_pipe_clk_register(struct qcom_qmp *qmp, struct device_node *np)
1047{
1048 struct clk_fixed_rate *fixed;
1049 struct clk_init_data init = { };
1050 int ret;
1051
1052 if ((qmp->cfg->type != PHY_TYPE_USB3) &&
1053 (qmp->cfg->type != PHY_TYPE_PCIE)) {
1054 /* not all phys register pipe clocks, so return success */
1055 return 0;
1056 }
1057
1058 ret = of_property_read_string(np, "clock-output-names", &init.name);
1059 if (ret) {
1060 dev_err(qmp->dev, "%s: No clock-output-names\n", np->name);
1061 return ret;
1062 }
1063
1064 fixed = devm_kzalloc(qmp->dev, sizeof(*fixed), GFP_KERNEL);
1065 if (!fixed)
1066 return -ENOMEM;
1067
1068 init.ops = &clk_fixed_rate_ops;
1069
1070 /* controllers using QMP phys use 125MHz pipe clock interface */
1071 fixed->fixed_rate = 125000000;
1072 fixed->hw.init = &init;
1073
1074 return devm_clk_hw_register(qmp->dev, &fixed->hw);
1075}
1076
1077static const struct phy_ops qcom_qmp_phy_gen_ops = {
1078 .init = qcom_qmp_phy_init,
1079 .exit = qcom_qmp_phy_exit,
1080 .power_on = qcom_qmp_phy_poweron,
1081 .power_off = qcom_qmp_phy_poweroff,
1082 .owner = THIS_MODULE,
1083};
1084
1085static
1086int qcom_qmp_phy_create(struct device *dev, struct device_node *np, int id)
1087{
1088 struct qcom_qmp *qmp = dev_get_drvdata(dev);
1089 struct phy *generic_phy;
1090 struct qmp_phy *qphy;
1091 char prop_name[MAX_PROP_NAME];
1092 int ret;
1093
1094 qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL);
1095 if (!qphy)
1096 return -ENOMEM;
1097
1098 /*
1099 * Get memory resources for each phy lane:
1100 * Resources are indexed as: tx -> 0; rx -> 1; pcs -> 2.
1101 */
1102 qphy->tx = of_iomap(np, 0);
1103 if (!qphy->tx)
1104 return -ENOMEM;
1105
1106 qphy->rx = of_iomap(np, 1);
1107 if (!qphy->rx)
1108 return -ENOMEM;
1109
1110 qphy->pcs = of_iomap(np, 2);
1111 if (!qphy->pcs)
1112 return -ENOMEM;
1113
1114 /*
1115 * Get PHY's Pipe clock, if any. USB3 and PCIe are PIPE3
1116 * based phys, so they essentially have pipe clock. So,
1117 * we return error in case phy is USB3 or PIPE type.
1118 * Otherwise, we initialize pipe clock to NULL for
1119 * all phys that don't need this.
1120 */
1121 snprintf(prop_name, sizeof(prop_name), "pipe%d", id);
1122 qphy->pipe_clk = of_clk_get_by_name(np, prop_name);
1123 if (IS_ERR(qphy->pipe_clk)) {
1124 if (qmp->cfg->type == PHY_TYPE_PCIE ||
1125 qmp->cfg->type == PHY_TYPE_USB3) {
1126 ret = PTR_ERR(qphy->pipe_clk);
1127 if (ret != -EPROBE_DEFER)
1128 dev_err(dev,
1129 "failed to get lane%d pipe_clk, %d\n",
1130 id, ret);
1131 return ret;
1132 }
1133 qphy->pipe_clk = NULL;
1134 }
1135
1136 /* Get lane reset, if any */
1137 if (qmp->cfg->has_lane_rst) {
1138 snprintf(prop_name, sizeof(prop_name), "lane%d", id);
1139 qphy->lane_rst = of_reset_control_get(np, prop_name);
1140 if (IS_ERR(qphy->lane_rst)) {
1141 dev_err(dev, "failed to get lane%d reset\n", id);
1142 return PTR_ERR(qphy->lane_rst);
1143 }
1144 }
1145
1146 generic_phy = devm_phy_create(dev, np, &qcom_qmp_phy_gen_ops);
1147 if (IS_ERR(generic_phy)) {
1148 ret = PTR_ERR(generic_phy);
1149 dev_err(dev, "failed to create qphy %d\n", ret);
1150 return ret;
1151 }
1152
1153 qphy->phy = generic_phy;
1154 qphy->index = id;
1155 qphy->qmp = qmp;
1156 qmp->phys[id] = qphy;
1157 phy_set_drvdata(generic_phy, qphy);
1158
1159 return 0;
1160}
1161
1162static const struct of_device_id qcom_qmp_phy_of_match_table[] = {
1163 {
1164 .compatible = "qcom,msm8996-qmp-pcie-phy",
1165 .data = &msm8996_pciephy_cfg,
1166 }, {
1167 .compatible = "qcom,msm8996-qmp-usb3-phy",
1168 .data = &msm8996_usb3phy_cfg,
1169 }, {
1170 .compatible = "qcom,ipq8074-qmp-pcie-phy",
1171 .data = &ipq8074_pciephy_cfg,
1172 },
1173 { },
1174};
1175MODULE_DEVICE_TABLE(of, qcom_qmp_phy_of_match_table);
1176
1177static int qcom_qmp_phy_probe(struct platform_device *pdev)
1178{
1179 struct qcom_qmp *qmp;
1180 struct device *dev = &pdev->dev;
1181 struct resource *res;
1182 struct device_node *child;
1183 struct phy_provider *phy_provider;
1184 void __iomem *base;
1185 int num, id;
1186 int ret;
1187
1188 qmp = devm_kzalloc(dev, sizeof(*qmp), GFP_KERNEL);
1189 if (!qmp)
1190 return -ENOMEM;
1191
1192 qmp->dev = dev;
1193 dev_set_drvdata(dev, qmp);
1194
1195 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1196 base = devm_ioremap_resource(dev, res);
1197 if (IS_ERR(base))
1198 return PTR_ERR(base);
1199
1200 /* per PHY serdes; usually located at base address */
1201 qmp->serdes = base;
1202
1203 mutex_init(&qmp->phy_mutex);
1204
1205 /* Get the specific init parameters of QMP phy */
1206 qmp->cfg = of_device_get_match_data(dev);
1207
1208 ret = qcom_qmp_phy_clk_init(dev);
1209 if (ret)
1210 return ret;
1211
1212 ret = qcom_qmp_phy_reset_init(dev);
1213 if (ret)
1214 return ret;
1215
1216 ret = qcom_qmp_phy_vreg_init(dev);
1217 if (ret) {
1218 dev_err(dev, "failed to get regulator supplies\n");
1219 return ret;
1220 }
1221
1222 num = of_get_available_child_count(dev->of_node);
1223 /* do we have a rogue child node ? */
1224 if (num > qmp->cfg->nlanes)
1225 return -EINVAL;
1226
1227 qmp->phys = devm_kcalloc(dev, num, sizeof(*qmp->phys), GFP_KERNEL);
1228 if (!qmp->phys)
1229 return -ENOMEM;
1230
1231 id = 0;
1232 for_each_available_child_of_node(dev->of_node, child) {
1233 /* Create per-lane phy */
1234 ret = qcom_qmp_phy_create(dev, child, id);
1235 if (ret) {
1236 dev_err(dev, "failed to create lane%d phy, %d\n",
1237 id, ret);
1238 return ret;
1239 }
1240
1241 /*
1242 * Register the pipe clock provided by phy.
1243 * See function description to see details of this pipe clock.
1244 */
1245 ret = phy_pipe_clk_register(qmp, child);
1246 if (ret) {
1247 dev_err(qmp->dev,
1248 "failed to register pipe clock source\n");
1249 return ret;
1250 }
1251 id++;
1252 }
1253
1254 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
1255 if (!IS_ERR(phy_provider))
1256 dev_info(dev, "Registered Qcom-QMP phy\n");
1257
1258 return PTR_ERR_OR_ZERO(phy_provider);
1259}
1260
1261static struct platform_driver qcom_qmp_phy_driver = {
1262 .probe = qcom_qmp_phy_probe,
1263 .driver = {
1264 .name = "qcom-qmp-phy",
1265 .of_match_table = qcom_qmp_phy_of_match_table,
1266 },
1267};
1268
1269module_platform_driver(qcom_qmp_phy_driver);
1270
1271MODULE_AUTHOR("Vivek Gautam <vivek.gautam@codeaurora.org>");
1272MODULE_DESCRIPTION("Qualcomm QMP PHY driver");
1273MODULE_LICENSE("GPL v2");