tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2018 Rockchip Electronics Co. Ltd.
4 *
5 * Author: Wyon Bi <bivvy.bi@rock-chips.com>
6 */
7
8#include <linux/bits.h>
9#include <linux/kernel.h>
10#include <linux/clk.h>
11#include <linux/iopoll.h>
12#include <linux/clk-provider.h>
13#include <linux/delay.h>
14#include <linux/init.h>
15#include <linux/mfd/syscon.h>
16#include <linux/module.h>
17#include <linux/of_device.h>
18#include <linux/platform_device.h>
19#include <linux/pm_runtime.h>
20#include <linux/reset.h>
21#include <linux/time64.h>
22
23#include <linux/phy/phy.h>
24#include <linux/phy/phy-mipi-dphy.h>
25
26#define UPDATE(x, h, l) (((x) << (l)) & GENMASK((h), (l)))
27
28/*
29 * The offset address[7:0] is distributed two parts, one from the bit7 to bit5
30 * is the first address, the other from the bit4 to bit0 is the second address.
31 * when you configure the registers, you must set both of them. The Clock Lane
32 * and Data Lane use the same registers with the same second address, but the
33 * first address is different.
34 */
35#define FIRST_ADDRESS(x) (((x) & 0x7) << 5)
36#define SECOND_ADDRESS(x) (((x) & 0x1f) << 0)
37#define PHY_REG(first, second) (FIRST_ADDRESS(first) | \
38 SECOND_ADDRESS(second))
39
40/* Analog Register Part: reg00 */
41#define BANDGAP_POWER_MASK BIT(7)
42#define BANDGAP_POWER_DOWN BIT(7)
43#define BANDGAP_POWER_ON 0
44#define LANE_EN_MASK GENMASK(6, 2)
45#define LANE_EN_CK BIT(6)
46#define LANE_EN_3 BIT(5)
47#define LANE_EN_2 BIT(4)
48#define LANE_EN_1 BIT(3)
49#define LANE_EN_0 BIT(2)
50#define POWER_WORK_MASK GENMASK(1, 0)
51#define POWER_WORK_ENABLE UPDATE(1, 1, 0)
52#define POWER_WORK_DISABLE UPDATE(2, 1, 0)
53/* Analog Register Part: reg01 */
54#define REG_SYNCRST_MASK BIT(2)
55#define REG_SYNCRST_RESET BIT(2)
56#define REG_SYNCRST_NORMAL 0
57#define REG_LDOPD_MASK BIT(1)
58#define REG_LDOPD_POWER_DOWN BIT(1)
59#define REG_LDOPD_POWER_ON 0
60#define REG_PLLPD_MASK BIT(0)
61#define REG_PLLPD_POWER_DOWN BIT(0)
62#define REG_PLLPD_POWER_ON 0
63/* Analog Register Part: reg03 */
64#define REG_FBDIV_HI_MASK BIT(5)
65#define REG_FBDIV_HI(x) UPDATE((x >> 8), 5, 5)
66#define REG_PREDIV_MASK GENMASK(4, 0)
67#define REG_PREDIV(x) UPDATE(x, 4, 0)
68/* Analog Register Part: reg04 */
69#define REG_FBDIV_LO_MASK GENMASK(7, 0)
70#define REG_FBDIV_LO(x) UPDATE(x, 7, 0)
71/* Analog Register Part: reg05 */
72#define SAMPLE_CLOCK_PHASE_MASK GENMASK(6, 4)
73#define SAMPLE_CLOCK_PHASE(x) UPDATE(x, 6, 4)
74#define CLOCK_LANE_SKEW_PHASE_MASK GENMASK(2, 0)
75#define CLOCK_LANE_SKEW_PHASE(x) UPDATE(x, 2, 0)
76/* Analog Register Part: reg06 */
77#define DATA_LANE_3_SKEW_PHASE_MASK GENMASK(6, 4)
78#define DATA_LANE_3_SKEW_PHASE(x) UPDATE(x, 6, 4)
79#define DATA_LANE_2_SKEW_PHASE_MASK GENMASK(2, 0)
80#define DATA_LANE_2_SKEW_PHASE(x) UPDATE(x, 2, 0)
81/* Analog Register Part: reg07 */
82#define DATA_LANE_1_SKEW_PHASE_MASK GENMASK(6, 4)
83#define DATA_LANE_1_SKEW_PHASE(x) UPDATE(x, 6, 4)
84#define DATA_LANE_0_SKEW_PHASE_MASK GENMASK(2, 0)
85#define DATA_LANE_0_SKEW_PHASE(x) UPDATE(x, 2, 0)
86/* Analog Register Part: reg08 */
87#define PLL_POST_DIV_ENABLE_MASK BIT(5)
88#define PLL_POST_DIV_ENABLE BIT(5)
89#define SAMPLE_CLOCK_DIRECTION_MASK BIT(4)
90#define SAMPLE_CLOCK_DIRECTION_REVERSE BIT(4)
91#define SAMPLE_CLOCK_DIRECTION_FORWARD 0
92#define LOWFRE_EN_MASK BIT(5)
93#define PLL_OUTPUT_FREQUENCY_DIV_BY_1 0
94#define PLL_OUTPUT_FREQUENCY_DIV_BY_2 1
95/* Analog Register Part: reg0b */
96#define CLOCK_LANE_VOD_RANGE_SET_MASK GENMASK(3, 0)
97#define CLOCK_LANE_VOD_RANGE_SET(x) UPDATE(x, 3, 0)
98#define VOD_MIN_RANGE 0x1
99#define VOD_MID_RANGE 0x3
100#define VOD_BIG_RANGE 0x7
101#define VOD_MAX_RANGE 0xf
102/* Analog Register Part: reg1E */
103#define PLL_MODE_SEL_MASK GENMASK(6, 5)
104#define PLL_MODE_SEL_LVDS_MODE 0
105#define PLL_MODE_SEL_MIPI_MODE BIT(5)
106/* Digital Register Part: reg00 */
107#define REG_DIG_RSTN_MASK BIT(0)
108#define REG_DIG_RSTN_NORMAL BIT(0)
109#define REG_DIG_RSTN_RESET 0
110/* Digital Register Part: reg01 */
111#define INVERT_TXCLKESC_MASK BIT(1)
112#define INVERT_TXCLKESC_ENABLE BIT(1)
113#define INVERT_TXCLKESC_DISABLE 0
114#define INVERT_TXBYTECLKHS_MASK BIT(0)
115#define INVERT_TXBYTECLKHS_ENABLE BIT(0)
116#define INVERT_TXBYTECLKHS_DISABLE 0
117/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg05 */
118#define T_LPX_CNT_MASK GENMASK(5, 0)
119#define T_LPX_CNT(x) UPDATE(x, 5, 0)
120/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg06 */
121#define T_HS_ZERO_CNT_HI_MASK BIT(7)
122#define T_HS_ZERO_CNT_HI(x) UPDATE(x, 7, 7)
123#define T_HS_PREPARE_CNT_MASK GENMASK(6, 0)
124#define T_HS_PREPARE_CNT(x) UPDATE(x, 6, 0)
125/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg07 */
126#define T_HS_ZERO_CNT_LO_MASK GENMASK(5, 0)
127#define T_HS_ZERO_CNT_LO(x) UPDATE(x, 5, 0)
128/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg08 */
129#define T_HS_TRAIL_CNT_MASK GENMASK(6, 0)
130#define T_HS_TRAIL_CNT(x) UPDATE(x, 6, 0)
131/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg09 */
132#define T_HS_EXIT_CNT_LO_MASK GENMASK(4, 0)
133#define T_HS_EXIT_CNT_LO(x) UPDATE(x, 4, 0)
134/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0a */
135#define T_CLK_POST_CNT_LO_MASK GENMASK(3, 0)
136#define T_CLK_POST_CNT_LO(x) UPDATE(x, 3, 0)
137/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0c */
138#define LPDT_TX_PPI_SYNC_MASK BIT(2)
139#define LPDT_TX_PPI_SYNC_ENABLE BIT(2)
140#define LPDT_TX_PPI_SYNC_DISABLE 0
141#define T_WAKEUP_CNT_HI_MASK GENMASK(1, 0)
142#define T_WAKEUP_CNT_HI(x) UPDATE(x, 1, 0)
143/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0d */
144#define T_WAKEUP_CNT_LO_MASK GENMASK(7, 0)
145#define T_WAKEUP_CNT_LO(x) UPDATE(x, 7, 0)
146/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0e */
147#define T_CLK_PRE_CNT_MASK GENMASK(3, 0)
148#define T_CLK_PRE_CNT(x) UPDATE(x, 3, 0)
149/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg10 */
150#define T_CLK_POST_CNT_HI_MASK GENMASK(7, 6)
151#define T_CLK_POST_CNT_HI(x) UPDATE(x, 7, 6)
152#define T_TA_GO_CNT_MASK GENMASK(5, 0)
153#define T_TA_GO_CNT(x) UPDATE(x, 5, 0)
154/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg11 */
155#define T_HS_EXIT_CNT_HI_MASK BIT(6)
156#define T_HS_EXIT_CNT_HI(x) UPDATE(x, 6, 6)
157#define T_TA_SURE_CNT_MASK GENMASK(5, 0)
158#define T_TA_SURE_CNT(x) UPDATE(x, 5, 0)
159/* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg12 */
160#define T_TA_WAIT_CNT_MASK GENMASK(5, 0)
161#define T_TA_WAIT_CNT(x) UPDATE(x, 5, 0)
162/* LVDS Register Part: reg00 */
163#define LVDS_DIGITAL_INTERNAL_RESET_MASK BIT(2)
164#define LVDS_DIGITAL_INTERNAL_RESET_DISABLE BIT(2)
165#define LVDS_DIGITAL_INTERNAL_RESET_ENABLE 0
166/* LVDS Register Part: reg01 */
167#define LVDS_DIGITAL_INTERNAL_ENABLE_MASK BIT(7)
168#define LVDS_DIGITAL_INTERNAL_ENABLE BIT(7)
169#define LVDS_DIGITAL_INTERNAL_DISABLE 0
170/* LVDS Register Part: reg03 */
171#define MODE_ENABLE_MASK GENMASK(2, 0)
172#define TTL_MODE_ENABLE BIT(2)
173#define LVDS_MODE_ENABLE BIT(1)
174#define MIPI_MODE_ENABLE BIT(0)
175/* LVDS Register Part: reg0b */
176#define LVDS_LANE_EN_MASK GENMASK(7, 3)
177#define LVDS_DATA_LANE0_EN BIT(7)
178#define LVDS_DATA_LANE1_EN BIT(6)
179#define LVDS_DATA_LANE2_EN BIT(5)
180#define LVDS_DATA_LANE3_EN BIT(4)
181#define LVDS_CLK_LANE_EN BIT(3)
182#define LVDS_PLL_POWER_MASK BIT(2)
183#define LVDS_PLL_POWER_OFF BIT(2)
184#define LVDS_PLL_POWER_ON 0
185#define LVDS_BANDGAP_POWER_MASK BIT(0)
186#define LVDS_BANDGAP_POWER_DOWN BIT(0)
187#define LVDS_BANDGAP_POWER_ON 0
188
189#define DSI_PHY_RSTZ 0xa0
190#define PHY_ENABLECLK BIT(2)
191#define DSI_PHY_STATUS 0xb0
192#define PHY_LOCK BIT(0)
193
194enum phy_max_rate {
195 MAX_1GHZ,
196 MAX_2_5GHZ,
197};
198
199struct inno_video_phy_plat_data {
200 const struct inno_mipi_dphy_timing *inno_mipi_dphy_timing_table;
201 const unsigned int num_timings;
202 enum phy_max_rate max_rate;
203};
204
205struct inno_dsidphy {
206 struct device *dev;
207 struct clk *ref_clk;
208 struct clk *pclk_phy;
209 struct clk *pclk_host;
210 const struct inno_video_phy_plat_data *pdata;
211 void __iomem *phy_base;
212 void __iomem *host_base;
213 struct reset_control *rst;
214 enum phy_mode mode;
215 struct phy_configure_opts_mipi_dphy dphy_cfg;
216
217 struct clk *pll_clk;
218 struct {
219 struct clk_hw hw;
220 u8 prediv;
221 u16 fbdiv;
222 unsigned long rate;
223 } pll;
224};
225
226enum {
227 REGISTER_PART_ANALOG,
228 REGISTER_PART_DIGITAL,
229 REGISTER_PART_CLOCK_LANE,
230 REGISTER_PART_DATA0_LANE,
231 REGISTER_PART_DATA1_LANE,
232 REGISTER_PART_DATA2_LANE,
233 REGISTER_PART_DATA3_LANE,
234 REGISTER_PART_LVDS,
235};
236
237struct inno_mipi_dphy_timing {
238 unsigned long rate;
239 u8 lpx;
240 u8 hs_prepare;
241 u8 clk_lane_hs_zero;
242 u8 data_lane_hs_zero;
243 u8 hs_trail;
244};
245
246static const
247struct inno_mipi_dphy_timing inno_mipi_dphy_timing_table_max_1ghz[] = {
248 { 110000000, 0x0, 0x20, 0x16, 0x02, 0x22},
249 { 150000000, 0x0, 0x06, 0x16, 0x03, 0x45},
250 { 200000000, 0x0, 0x18, 0x17, 0x04, 0x0b},
251 { 250000000, 0x0, 0x05, 0x17, 0x05, 0x16},
252 { 300000000, 0x0, 0x51, 0x18, 0x06, 0x2c},
253 { 400000000, 0x0, 0x64, 0x19, 0x07, 0x33},
254 { 500000000, 0x0, 0x20, 0x1b, 0x07, 0x4e},
255 { 600000000, 0x0, 0x6a, 0x1d, 0x08, 0x3a},
256 { 700000000, 0x0, 0x3e, 0x1e, 0x08, 0x6a},
257 { 800000000, 0x0, 0x21, 0x1f, 0x09, 0x29},
258 {1000000000, 0x0, 0x09, 0x20, 0x09, 0x27},
259};
260
261static const
262struct inno_mipi_dphy_timing inno_mipi_dphy_timing_table_max_2_5ghz[] = {
263 { 110000000, 0x02, 0x7f, 0x16, 0x02, 0x02},
264 { 150000000, 0x02, 0x7f, 0x16, 0x03, 0x02},
265 { 200000000, 0x02, 0x7f, 0x17, 0x04, 0x02},
266 { 250000000, 0x02, 0x7f, 0x17, 0x05, 0x04},
267 { 300000000, 0x02, 0x7f, 0x18, 0x06, 0x04},
268 { 400000000, 0x03, 0x7e, 0x19, 0x07, 0x04},
269 { 500000000, 0x03, 0x7c, 0x1b, 0x07, 0x08},
270 { 600000000, 0x03, 0x70, 0x1d, 0x08, 0x10},
271 { 700000000, 0x05, 0x40, 0x1e, 0x08, 0x30},
272 { 800000000, 0x05, 0x02, 0x1f, 0x09, 0x30},
273 {1000000000, 0x05, 0x08, 0x20, 0x09, 0x30},
274 {1200000000, 0x06, 0x03, 0x32, 0x14, 0x0f},
275 {1400000000, 0x09, 0x03, 0x32, 0x14, 0x0f},
276 {1600000000, 0x0d, 0x42, 0x36, 0x0e, 0x0f},
277 {1800000000, 0x0e, 0x47, 0x7a, 0x0e, 0x0f},
278 {2000000000, 0x11, 0x64, 0x7a, 0x0e, 0x0b},
279 {2200000000, 0x13, 0x64, 0x7e, 0x15, 0x0b},
280 {2400000000, 0x13, 0x33, 0x7f, 0x15, 0x6a},
281 {2500000000, 0x15, 0x54, 0x7f, 0x15, 0x6a},
282};
283
284static inline struct inno_dsidphy *hw_to_inno(struct clk_hw *hw)
285{
286 return container_of(hw, struct inno_dsidphy, pll.hw);
287}
288
289static void phy_update_bits(struct inno_dsidphy *inno,
290 u8 first, u8 second, u8 mask, u8 val)
291{
292 u32 reg = PHY_REG(first, second) << 2;
293 unsigned int tmp, orig;
294
295 orig = readl(inno->phy_base + reg);
296 tmp = orig & ~mask;
297 tmp |= val & mask;
298 writel(tmp, inno->phy_base + reg);
299}
300
301static unsigned long inno_dsidphy_pll_calc_rate(struct inno_dsidphy *inno,
302 unsigned long rate)
303{
304 unsigned long prate = clk_get_rate(inno->ref_clk);
305 unsigned long best_freq = 0;
306 unsigned long fref, fout;
307 u8 min_prediv, max_prediv;
308 u8 _prediv, best_prediv = 1;
309 u16 _fbdiv, best_fbdiv = 1;
310 u32 min_delta = UINT_MAX;
311
312 /*
313 * The PLL output frequency can be calculated using a simple formula:
314 * PLL_Output_Frequency = (FREF / PREDIV * FBDIV) / 2
315 * PLL_Output_Frequency: it is equal to DDR-Clock-Frequency * 2
316 */
317 fref = prate / 2;
318 if (rate > 1000000000UL)
319 fout = 1000000000UL;
320 else
321 fout = rate;
322
323 /* 5Mhz < Fref / prediv < 40MHz */
324 min_prediv = DIV_ROUND_UP(fref, 40000000);
325 max_prediv = fref / 5000000;
326
327 for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
328 u64 tmp;
329 u32 delta;
330
331 tmp = (u64)fout * _prediv;
332 do_div(tmp, fref);
333 _fbdiv = tmp;
334
335 /*
336 * The possible settings of feedback divider are
337 * 12, 13, 14, 16, ~ 511
338 */
339 if (_fbdiv == 15)
340 continue;
341
342 if (_fbdiv < 12 || _fbdiv > 511)
343 continue;
344
345 tmp = (u64)_fbdiv * fref;
346 do_div(tmp, _prediv);
347
348 delta = abs(fout - tmp);
349 if (!delta) {
350 best_prediv = _prediv;
351 best_fbdiv = _fbdiv;
352 best_freq = tmp;
353 break;
354 } else if (delta < min_delta) {
355 best_prediv = _prediv;
356 best_fbdiv = _fbdiv;
357 best_freq = tmp;
358 min_delta = delta;
359 }
360 }
361
362 if (best_freq) {
363 inno->pll.prediv = best_prediv;
364 inno->pll.fbdiv = best_fbdiv;
365 inno->pll.rate = best_freq;
366 }
367
368 return best_freq;
369}
370
371static void inno_dsidphy_mipi_mode_enable(struct inno_dsidphy *inno)
372{
373 struct phy_configure_opts_mipi_dphy *cfg = &inno->dphy_cfg;
374 const struct inno_mipi_dphy_timing *timings;
375 u32 t_txbyteclkhs, t_txclkesc;
376 u32 txbyteclkhs, txclkesc, esc_clk_div;
377 u32 hs_exit, clk_post, clk_pre, wakeup, lpx, ta_go, ta_sure, ta_wait;
378 u32 hs_prepare, hs_trail, hs_zero, clk_lane_hs_zero, data_lane_hs_zero;
379 unsigned int i;
380
381 timings = inno->pdata->inno_mipi_dphy_timing_table;
382
383 inno_dsidphy_pll_calc_rate(inno, cfg->hs_clk_rate);
384
385 /* Select MIPI mode */
386 phy_update_bits(inno, REGISTER_PART_LVDS, 0x03,
387 MODE_ENABLE_MASK, MIPI_MODE_ENABLE);
388 /* Configure PLL */
389 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
390 REG_PREDIV_MASK, REG_PREDIV(inno->pll.prediv));
391 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
392 REG_FBDIV_HI_MASK, REG_FBDIV_HI(inno->pll.fbdiv));
393 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x04,
394 REG_FBDIV_LO_MASK, REG_FBDIV_LO(inno->pll.fbdiv));
395 if (inno->pdata->max_rate == MAX_2_5GHZ) {
396 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x08,
397 PLL_POST_DIV_ENABLE_MASK, PLL_POST_DIV_ENABLE);
398 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x0b,
399 CLOCK_LANE_VOD_RANGE_SET_MASK,
400 CLOCK_LANE_VOD_RANGE_SET(VOD_MAX_RANGE));
401 }
402 /* Enable PLL and LDO */
403 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
404 REG_LDOPD_MASK | REG_PLLPD_MASK,
405 REG_LDOPD_POWER_ON | REG_PLLPD_POWER_ON);
406 /* Reset analog */
407 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
408 REG_SYNCRST_MASK, REG_SYNCRST_RESET);
409 udelay(1);
410 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
411 REG_SYNCRST_MASK, REG_SYNCRST_NORMAL);
412 /* Reset digital */
413 phy_update_bits(inno, REGISTER_PART_DIGITAL, 0x00,
414 REG_DIG_RSTN_MASK, REG_DIG_RSTN_RESET);
415 udelay(1);
416 phy_update_bits(inno, REGISTER_PART_DIGITAL, 0x00,
417 REG_DIG_RSTN_MASK, REG_DIG_RSTN_NORMAL);
418
419 txbyteclkhs = inno->pll.rate / 8;
420 t_txbyteclkhs = div_u64(PSEC_PER_SEC, txbyteclkhs);
421
422 esc_clk_div = DIV_ROUND_UP(txbyteclkhs, 20000000);
423 txclkesc = txbyteclkhs / esc_clk_div;
424 t_txclkesc = div_u64(PSEC_PER_SEC, txclkesc);
425
426 /*
427 * The value of counter for HS Ths-exit
428 * Ths-exit = Tpin_txbyteclkhs * value
429 */
430 hs_exit = DIV_ROUND_UP(cfg->hs_exit, t_txbyteclkhs);
431 /*
432 * The value of counter for HS Tclk-post
433 * Tclk-post = Tpin_txbyteclkhs * value
434 */
435 clk_post = DIV_ROUND_UP(cfg->clk_post, t_txbyteclkhs);
436 /*
437 * The value of counter for HS Tclk-pre
438 * Tclk-pre = Tpin_txbyteclkhs * value
439 */
440 clk_pre = DIV_ROUND_UP(cfg->clk_pre, BITS_PER_BYTE);
441
442 /*
443 * The value of counter for HS Tta-go
444 * Tta-go for turnaround
445 * Tta-go = Ttxclkesc * value
446 */
447 ta_go = DIV_ROUND_UP(cfg->ta_go, t_txclkesc);
448 /*
449 * The value of counter for HS Tta-sure
450 * Tta-sure for turnaround
451 * Tta-sure = Ttxclkesc * value
452 */
453 ta_sure = DIV_ROUND_UP(cfg->ta_sure, t_txclkesc);
454 /*
455 * The value of counter for HS Tta-wait
456 * Tta-wait for turnaround
457 * Tta-wait = Ttxclkesc * value
458 */
459 ta_wait = DIV_ROUND_UP(cfg->ta_get, t_txclkesc);
460
461 for (i = 0; i < inno->pdata->num_timings; i++)
462 if (inno->pll.rate <= timings[i].rate)
463 break;
464
465 if (i == inno->pdata->num_timings)
466 --i;
467
468 /*
469 * The value of counter for HS Tlpx Time
470 * Tlpx = Tpin_txbyteclkhs * (2 + value)
471 */
472 if (inno->pdata->max_rate == MAX_1GHZ) {
473 lpx = DIV_ROUND_UP(cfg->lpx, t_txbyteclkhs);
474 if (lpx >= 2)
475 lpx -= 2;
476 } else
477 lpx = timings[i].lpx;
478
479 hs_prepare = timings[i].hs_prepare;
480 hs_trail = timings[i].hs_trail;
481 clk_lane_hs_zero = timings[i].clk_lane_hs_zero;
482 data_lane_hs_zero = timings[i].data_lane_hs_zero;
483 wakeup = 0x3ff;
484
485 for (i = REGISTER_PART_CLOCK_LANE; i <= REGISTER_PART_DATA3_LANE; i++) {
486 if (i == REGISTER_PART_CLOCK_LANE)
487 hs_zero = clk_lane_hs_zero;
488 else
489 hs_zero = data_lane_hs_zero;
490
491 phy_update_bits(inno, i, 0x05, T_LPX_CNT_MASK,
492 T_LPX_CNT(lpx));
493 phy_update_bits(inno, i, 0x06, T_HS_PREPARE_CNT_MASK,
494 T_HS_PREPARE_CNT(hs_prepare));
495 if (inno->pdata->max_rate == MAX_2_5GHZ)
496 phy_update_bits(inno, i, 0x06, T_HS_ZERO_CNT_HI_MASK,
497 T_HS_ZERO_CNT_HI(hs_zero >> 6));
498 phy_update_bits(inno, i, 0x07, T_HS_ZERO_CNT_LO_MASK,
499 T_HS_ZERO_CNT_LO(hs_zero));
500 phy_update_bits(inno, i, 0x08, T_HS_TRAIL_CNT_MASK,
501 T_HS_TRAIL_CNT(hs_trail));
502 if (inno->pdata->max_rate == MAX_2_5GHZ)
503 phy_update_bits(inno, i, 0x11, T_HS_EXIT_CNT_HI_MASK,
504 T_HS_EXIT_CNT_HI(hs_exit >> 5));
505 phy_update_bits(inno, i, 0x09, T_HS_EXIT_CNT_LO_MASK,
506 T_HS_EXIT_CNT_LO(hs_exit));
507 if (inno->pdata->max_rate == MAX_2_5GHZ)
508 phy_update_bits(inno, i, 0x10, T_CLK_POST_CNT_HI_MASK,
509 T_CLK_POST_CNT_HI(clk_post >> 4));
510 phy_update_bits(inno, i, 0x0a, T_CLK_POST_CNT_LO_MASK,
511 T_CLK_POST_CNT_LO(clk_post));
512 phy_update_bits(inno, i, 0x0e, T_CLK_PRE_CNT_MASK,
513 T_CLK_PRE_CNT(clk_pre));
514 phy_update_bits(inno, i, 0x0c, T_WAKEUP_CNT_HI_MASK,
515 T_WAKEUP_CNT_HI(wakeup >> 8));
516 phy_update_bits(inno, i, 0x0d, T_WAKEUP_CNT_LO_MASK,
517 T_WAKEUP_CNT_LO(wakeup));
518 phy_update_bits(inno, i, 0x10, T_TA_GO_CNT_MASK,
519 T_TA_GO_CNT(ta_go));
520 phy_update_bits(inno, i, 0x11, T_TA_SURE_CNT_MASK,
521 T_TA_SURE_CNT(ta_sure));
522 phy_update_bits(inno, i, 0x12, T_TA_WAIT_CNT_MASK,
523 T_TA_WAIT_CNT(ta_wait));
524 }
525
526 /* Enable all lanes on analog part */
527 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
528 LANE_EN_MASK, LANE_EN_CK | LANE_EN_3 | LANE_EN_2 |
529 LANE_EN_1 | LANE_EN_0);
530}
531
532static void inno_dsidphy_lvds_mode_enable(struct inno_dsidphy *inno)
533{
534 u8 prediv = 2;
535 u16 fbdiv = 28;
536
537 /* Sample clock reverse direction */
538 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x08,
539 SAMPLE_CLOCK_DIRECTION_MASK | LOWFRE_EN_MASK,
540 SAMPLE_CLOCK_DIRECTION_REVERSE |
541 PLL_OUTPUT_FREQUENCY_DIV_BY_1);
542
543 /* Select LVDS mode */
544 phy_update_bits(inno, REGISTER_PART_LVDS, 0x03,
545 MODE_ENABLE_MASK, LVDS_MODE_ENABLE);
546 /* Configure PLL */
547 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
548 REG_PREDIV_MASK, REG_PREDIV(prediv));
549 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
550 REG_FBDIV_HI_MASK, REG_FBDIV_HI(fbdiv));
551 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x04,
552 REG_FBDIV_LO_MASK, REG_FBDIV_LO(fbdiv));
553 phy_update_bits(inno, REGISTER_PART_LVDS, 0x08, 0xff, 0xfc);
554 /* Enable PLL and Bandgap */
555 phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b,
556 LVDS_PLL_POWER_MASK | LVDS_BANDGAP_POWER_MASK,
557 LVDS_PLL_POWER_ON | LVDS_BANDGAP_POWER_ON);
558
559 msleep(20);
560
561 /* Select PLL mode */
562 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x1e,
563 PLL_MODE_SEL_MASK, PLL_MODE_SEL_LVDS_MODE);
564
565 /* Reset LVDS digital logic */
566 phy_update_bits(inno, REGISTER_PART_LVDS, 0x00,
567 LVDS_DIGITAL_INTERNAL_RESET_MASK,
568 LVDS_DIGITAL_INTERNAL_RESET_ENABLE);
569 udelay(1);
570 phy_update_bits(inno, REGISTER_PART_LVDS, 0x00,
571 LVDS_DIGITAL_INTERNAL_RESET_MASK,
572 LVDS_DIGITAL_INTERNAL_RESET_DISABLE);
573 /* Enable LVDS digital logic */
574 phy_update_bits(inno, REGISTER_PART_LVDS, 0x01,
575 LVDS_DIGITAL_INTERNAL_ENABLE_MASK,
576 LVDS_DIGITAL_INTERNAL_ENABLE);
577 /* Enable LVDS analog driver */
578 phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b,
579 LVDS_LANE_EN_MASK, LVDS_CLK_LANE_EN |
580 LVDS_DATA_LANE0_EN | LVDS_DATA_LANE1_EN |
581 LVDS_DATA_LANE2_EN | LVDS_DATA_LANE3_EN);
582}
583
584static int inno_dsidphy_power_on(struct phy *phy)
585{
586 struct inno_dsidphy *inno = phy_get_drvdata(phy);
587
588 clk_prepare_enable(inno->pclk_phy);
589 clk_prepare_enable(inno->ref_clk);
590 pm_runtime_get_sync(inno->dev);
591
592 /* Bandgap power on */
593 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
594 BANDGAP_POWER_MASK, BANDGAP_POWER_ON);
595 /* Enable power work */
596 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
597 POWER_WORK_MASK, POWER_WORK_ENABLE);
598
599 switch (inno->mode) {
600 case PHY_MODE_MIPI_DPHY:
601 inno_dsidphy_mipi_mode_enable(inno);
602 break;
603 case PHY_MODE_LVDS:
604 inno_dsidphy_lvds_mode_enable(inno);
605 break;
606 default:
607 return -EINVAL;
608 }
609
610 return 0;
611}
612
613static int inno_dsidphy_power_off(struct phy *phy)
614{
615 struct inno_dsidphy *inno = phy_get_drvdata(phy);
616
617 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00, LANE_EN_MASK, 0);
618 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
619 REG_LDOPD_MASK | REG_PLLPD_MASK,
620 REG_LDOPD_POWER_DOWN | REG_PLLPD_POWER_DOWN);
621 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
622 POWER_WORK_MASK, POWER_WORK_DISABLE);
623 phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
624 BANDGAP_POWER_MASK, BANDGAP_POWER_DOWN);
625
626 phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b, LVDS_LANE_EN_MASK, 0);
627 phy_update_bits(inno, REGISTER_PART_LVDS, 0x01,
628 LVDS_DIGITAL_INTERNAL_ENABLE_MASK,
629 LVDS_DIGITAL_INTERNAL_DISABLE);
630 phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b,
631 LVDS_PLL_POWER_MASK | LVDS_BANDGAP_POWER_MASK,
632 LVDS_PLL_POWER_OFF | LVDS_BANDGAP_POWER_DOWN);
633
634 pm_runtime_put(inno->dev);
635 clk_disable_unprepare(inno->ref_clk);
636 clk_disable_unprepare(inno->pclk_phy);
637
638 return 0;
639}
640
641static int inno_dsidphy_set_mode(struct phy *phy, enum phy_mode mode,
642 int submode)
643{
644 struct inno_dsidphy *inno = phy_get_drvdata(phy);
645
646 switch (mode) {
647 case PHY_MODE_MIPI_DPHY:
648 case PHY_MODE_LVDS:
649 inno->mode = mode;
650 break;
651 default:
652 return -EINVAL;
653 }
654
655 return 0;
656}
657
658static int inno_dsidphy_configure(struct phy *phy,
659 union phy_configure_opts *opts)
660{
661 struct inno_dsidphy *inno = phy_get_drvdata(phy);
662 int ret;
663
664 if (inno->mode != PHY_MODE_MIPI_DPHY)
665 return -EINVAL;
666
667 ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);
668 if (ret)
669 return ret;
670
671 memcpy(&inno->dphy_cfg, &opts->mipi_dphy, sizeof(inno->dphy_cfg));
672
673 return 0;
674}
675
676static const struct phy_ops inno_dsidphy_ops = {
677 .configure = inno_dsidphy_configure,
678 .set_mode = inno_dsidphy_set_mode,
679 .power_on = inno_dsidphy_power_on,
680 .power_off = inno_dsidphy_power_off,
681 .owner = THIS_MODULE,
682};
683
684static const struct inno_video_phy_plat_data max_1ghz_video_phy_plat_data = {
685 .inno_mipi_dphy_timing_table = inno_mipi_dphy_timing_table_max_1ghz,
686 .num_timings = ARRAY_SIZE(inno_mipi_dphy_timing_table_max_1ghz),
687 .max_rate = MAX_1GHZ,
688};
689
690static const struct inno_video_phy_plat_data max_2_5ghz_video_phy_plat_data = {
691 .inno_mipi_dphy_timing_table = inno_mipi_dphy_timing_table_max_2_5ghz,
692 .num_timings = ARRAY_SIZE(inno_mipi_dphy_timing_table_max_2_5ghz),
693 .max_rate = MAX_2_5GHZ,
694};
695
696static int inno_dsidphy_probe(struct platform_device *pdev)
697{
698 struct device *dev = &pdev->dev;
699 struct inno_dsidphy *inno;
700 struct phy_provider *phy_provider;
701 struct phy *phy;
702 int ret;
703
704 inno = devm_kzalloc(dev, sizeof(*inno), GFP_KERNEL);
705 if (!inno)
706 return -ENOMEM;
707
708 inno->dev = dev;
709 inno->pdata = of_device_get_match_data(inno->dev);
710 platform_set_drvdata(pdev, inno);
711
712 inno->phy_base = devm_platform_ioremap_resource(pdev, 0);
713 if (IS_ERR(inno->phy_base))
714 return PTR_ERR(inno->phy_base);
715
716 inno->ref_clk = devm_clk_get(dev, "ref");
717 if (IS_ERR(inno->ref_clk)) {
718 ret = PTR_ERR(inno->ref_clk);
719 dev_err(dev, "failed to get ref clock: %d\n", ret);
720 return ret;
721 }
722
723 inno->pclk_phy = devm_clk_get(dev, "pclk");
724 if (IS_ERR(inno->pclk_phy)) {
725 ret = PTR_ERR(inno->pclk_phy);
726 dev_err(dev, "failed to get phy pclk: %d\n", ret);
727 return ret;
728 }
729
730 inno->rst = devm_reset_control_get(dev, "apb");
731 if (IS_ERR(inno->rst)) {
732 ret = PTR_ERR(inno->rst);
733 dev_err(dev, "failed to get system reset control: %d\n", ret);
734 return ret;
735 }
736
737 phy = devm_phy_create(dev, NULL, &inno_dsidphy_ops);
738 if (IS_ERR(phy)) {
739 ret = PTR_ERR(phy);
740 dev_err(dev, "failed to create phy: %d\n", ret);
741 return ret;
742 }
743
744 phy_set_drvdata(phy, inno);
745
746 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
747 if (IS_ERR(phy_provider)) {
748 ret = PTR_ERR(phy_provider);
749 dev_err(dev, "failed to register phy provider: %d\n", ret);
750 return ret;
751 }
752
753 pm_runtime_enable(dev);
754
755 return 0;
756}
757
758static int inno_dsidphy_remove(struct platform_device *pdev)
759{
760 struct inno_dsidphy *inno = platform_get_drvdata(pdev);
761
762 pm_runtime_disable(inno->dev);
763
764 return 0;
765}
766
767static const struct of_device_id inno_dsidphy_of_match[] = {
768 {
769 .compatible = "rockchip,px30-dsi-dphy",
770 .data = &max_1ghz_video_phy_plat_data,
771 }, {
772 .compatible = "rockchip,rk3128-dsi-dphy",
773 .data = &max_1ghz_video_phy_plat_data,
774 }, {
775 .compatible = "rockchip,rk3368-dsi-dphy",
776 .data = &max_1ghz_video_phy_plat_data,
777 }, {
778 .compatible = "rockchip,rk3568-dsi-dphy",
779 .data = &max_2_5ghz_video_phy_plat_data,
780 },
781 {}
782};
783MODULE_DEVICE_TABLE(of, inno_dsidphy_of_match);
784
785static struct platform_driver inno_dsidphy_driver = {
786 .driver = {
787 .name = "inno-dsidphy",
788 .of_match_table = of_match_ptr(inno_dsidphy_of_match),
789 },
790 .probe = inno_dsidphy_probe,
791 .remove = inno_dsidphy_remove,
792};
793module_platform_driver(inno_dsidphy_driver);
794
795MODULE_AUTHOR("Wyon Bi <bivvy.bi@rock-chips.com>");
796MODULE_DESCRIPTION("Innosilicon MIPI/LVDS/TTL Video Combo PHY driver");
797MODULE_LICENSE("GPL v2");