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1/*
2 * Copyright (c) 2016, 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#include <linux/clk-provider.h>
15
16#include "hdmi.h"
17
18#define HDMI_VCO_MAX_FREQ 12000000000UL
19#define HDMI_VCO_MIN_FREQ 8000000000UL
20
21#define HDMI_PCLK_MAX_FREQ 600000000
22#define HDMI_PCLK_MIN_FREQ 25000000
23
24#define HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD 3400000000UL
25#define HDMI_DIG_FREQ_BIT_CLK_THRESHOLD 1500000000UL
26#define HDMI_MID_FREQ_BIT_CLK_THRESHOLD 750000000UL
27#define HDMI_CORECLK_DIV 5
28#define HDMI_DEFAULT_REF_CLOCK 19200000
29#define HDMI_PLL_CMP_CNT 1024
30
31#define HDMI_PLL_POLL_MAX_READS 100
32#define HDMI_PLL_POLL_TIMEOUT_US 150
33
34#define HDMI_NUM_TX_CHANNEL 4
35
36struct hdmi_pll_8996 {
37 struct platform_device *pdev;
38 struct clk_hw clk_hw;
39
40 /* pll mmio base */
41 void __iomem *mmio_qserdes_com;
42 /* tx channel base */
43 void __iomem *mmio_qserdes_tx[HDMI_NUM_TX_CHANNEL];
44};
45
46#define hw_clk_to_pll(x) container_of(x, struct hdmi_pll_8996, clk_hw)
47
48struct hdmi_8996_phy_pll_reg_cfg {
49 u32 tx_lx_lane_mode[HDMI_NUM_TX_CHANNEL];
50 u32 tx_lx_tx_band[HDMI_NUM_TX_CHANNEL];
51 u32 com_svs_mode_clk_sel;
52 u32 com_hsclk_sel;
53 u32 com_pll_cctrl_mode0;
54 u32 com_pll_rctrl_mode0;
55 u32 com_cp_ctrl_mode0;
56 u32 com_dec_start_mode0;
57 u32 com_div_frac_start1_mode0;
58 u32 com_div_frac_start2_mode0;
59 u32 com_div_frac_start3_mode0;
60 u32 com_integloop_gain0_mode0;
61 u32 com_integloop_gain1_mode0;
62 u32 com_lock_cmp_en;
63 u32 com_lock_cmp1_mode0;
64 u32 com_lock_cmp2_mode0;
65 u32 com_lock_cmp3_mode0;
66 u32 com_core_clk_en;
67 u32 com_coreclk_div;
68 u32 com_vco_tune_ctrl;
69
70 u32 tx_lx_tx_drv_lvl[HDMI_NUM_TX_CHANNEL];
71 u32 tx_lx_tx_emp_post1_lvl[HDMI_NUM_TX_CHANNEL];
72 u32 tx_lx_vmode_ctrl1[HDMI_NUM_TX_CHANNEL];
73 u32 tx_lx_vmode_ctrl2[HDMI_NUM_TX_CHANNEL];
74 u32 tx_lx_res_code_lane_tx[HDMI_NUM_TX_CHANNEL];
75 u32 tx_lx_hp_pd_enables[HDMI_NUM_TX_CHANNEL];
76
77 u32 phy_mode;
78};
79
80struct hdmi_8996_post_divider {
81 u64 vco_freq;
82 int hsclk_divsel;
83 int vco_ratio;
84 int tx_band_sel;
85 int half_rate_mode;
86};
87
88static inline struct hdmi_phy *pll_get_phy(struct hdmi_pll_8996 *pll)
89{
90 return platform_get_drvdata(pll->pdev);
91}
92
93static inline void hdmi_pll_write(struct hdmi_pll_8996 *pll, int offset,
94 u32 data)
95{
96 msm_writel(data, pll->mmio_qserdes_com + offset);
97}
98
99static inline u32 hdmi_pll_read(struct hdmi_pll_8996 *pll, int offset)
100{
101 return msm_readl(pll->mmio_qserdes_com + offset);
102}
103
104static inline void hdmi_tx_chan_write(struct hdmi_pll_8996 *pll, int channel,
105 int offset, int data)
106{
107 msm_writel(data, pll->mmio_qserdes_tx[channel] + offset);
108}
109
110static inline u32 pll_get_cpctrl(u64 frac_start, unsigned long ref_clk,
111 bool gen_ssc)
112{
113 if ((frac_start != 0) || gen_ssc)
114 return (11000000 / (ref_clk / 20));
115
116 return 0x23;
117}
118
119static inline u32 pll_get_rctrl(u64 frac_start, bool gen_ssc)
120{
121 if ((frac_start != 0) || gen_ssc)
122 return 0x16;
123
124 return 0x10;
125}
126
127static inline u32 pll_get_cctrl(u64 frac_start, bool gen_ssc)
128{
129 if ((frac_start != 0) || gen_ssc)
130 return 0x28;
131
132 return 0x1;
133}
134
135static inline u32 pll_get_integloop_gain(u64 frac_start, u64 bclk, u32 ref_clk,
136 bool gen_ssc)
137{
138 int digclk_divsel = bclk >= HDMI_DIG_FREQ_BIT_CLK_THRESHOLD ? 1 : 2;
139 u64 base;
140
141 if ((frac_start != 0) || gen_ssc)
142 base = (64 * ref_clk) / HDMI_DEFAULT_REF_CLOCK;
143 else
144 base = (1022 * ref_clk) / 100;
145
146 base <<= digclk_divsel;
147
148 return (base <= 2046 ? base : 2046);
149}
150
151static inline u32 pll_get_pll_cmp(u64 fdata, unsigned long ref_clk)
152{
153 u64 dividend = HDMI_PLL_CMP_CNT * fdata;
154 u32 divisor = ref_clk * 10;
155 u32 rem;
156
157 rem = do_div(dividend, divisor);
158 if (rem > (divisor >> 1))
159 dividend++;
160
161 return dividend - 1;
162}
163
164static inline u64 pll_cmp_to_fdata(u32 pll_cmp, unsigned long ref_clk)
165{
166 u64 fdata = ((u64)pll_cmp) * ref_clk * 10;
167
168 do_div(fdata, HDMI_PLL_CMP_CNT);
169
170 return fdata;
171}
172
173static int pll_get_post_div(struct hdmi_8996_post_divider *pd, u64 bclk)
174{
175 int ratio[] = { 2, 3, 4, 5, 6, 9, 10, 12, 14, 15, 20, 21, 25, 28, 35 };
176 int hs_divsel[] = { 0, 4, 8, 12, 1, 5, 2, 9, 3, 13, 10, 7, 14, 11, 15 };
177 int tx_band_sel[] = { 0, 1, 2, 3 };
178 u64 vco_freq[60];
179 u64 vco, vco_optimal;
180 int half_rate_mode = 0;
181 int vco_optimal_index, vco_freq_index;
182 int i, j;
183
184retry:
185 vco_optimal = HDMI_VCO_MAX_FREQ;
186 vco_optimal_index = -1;
187 vco_freq_index = 0;
188 for (i = 0; i < 15; i++) {
189 for (j = 0; j < 4; j++) {
190 u32 ratio_mult = ratio[i] << tx_band_sel[j];
191
192 vco = bclk >> half_rate_mode;
193 vco *= ratio_mult;
194 vco_freq[vco_freq_index++] = vco;
195 }
196 }
197
198 for (i = 0; i < 60; i++) {
199 u64 vco_tmp = vco_freq[i];
200
201 if ((vco_tmp >= HDMI_VCO_MIN_FREQ) &&
202 (vco_tmp <= vco_optimal)) {
203 vco_optimal = vco_tmp;
204 vco_optimal_index = i;
205 }
206 }
207
208 if (vco_optimal_index == -1) {
209 if (!half_rate_mode) {
210 half_rate_mode = 1;
211 goto retry;
212 }
213 } else {
214 pd->vco_freq = vco_optimal;
215 pd->tx_band_sel = tx_band_sel[vco_optimal_index % 4];
216 pd->vco_ratio = ratio[vco_optimal_index / 4];
217 pd->hsclk_divsel = hs_divsel[vco_optimal_index / 4];
218
219 return 0;
220 }
221
222 return -EINVAL;
223}
224
225static int pll_calculate(unsigned long pix_clk, unsigned long ref_clk,
226 struct hdmi_8996_phy_pll_reg_cfg *cfg)
227{
228 struct hdmi_8996_post_divider pd;
229 u64 bclk;
230 u64 tmds_clk;
231 u64 dec_start;
232 u64 frac_start;
233 u64 fdata;
234 u32 pll_divisor;
235 u32 rem;
236 u32 cpctrl;
237 u32 rctrl;
238 u32 cctrl;
239 u32 integloop_gain;
240 u32 pll_cmp;
241 int i, ret;
242
243 /* bit clk = 10 * pix_clk */
244 bclk = ((u64)pix_clk) * 10;
245
246 if (bclk > HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD)
247 tmds_clk = pix_clk >> 2;
248 else
249 tmds_clk = pix_clk;
250
251 ret = pll_get_post_div(&pd, bclk);
252 if (ret)
253 return ret;
254
255 dec_start = pd.vco_freq;
256 pll_divisor = 4 * ref_clk;
257 do_div(dec_start, pll_divisor);
258
259 frac_start = pd.vco_freq * (1 << 20);
260
261 rem = do_div(frac_start, pll_divisor);
262 frac_start -= dec_start * (1 << 20);
263 if (rem > (pll_divisor >> 1))
264 frac_start++;
265
266 cpctrl = pll_get_cpctrl(frac_start, ref_clk, false);
267 rctrl = pll_get_rctrl(frac_start, false);
268 cctrl = pll_get_cctrl(frac_start, false);
269 integloop_gain = pll_get_integloop_gain(frac_start, bclk,
270 ref_clk, false);
271
272 fdata = pd.vco_freq;
273 do_div(fdata, pd.vco_ratio);
274
275 pll_cmp = pll_get_pll_cmp(fdata, ref_clk);
276
277 DBG("VCO freq: %llu", pd.vco_freq);
278 DBG("fdata: %llu", fdata);
279 DBG("pix_clk: %lu", pix_clk);
280 DBG("tmds clk: %llu", tmds_clk);
281 DBG("HSCLK_SEL: %d", pd.hsclk_divsel);
282 DBG("DEC_START: %llu", dec_start);
283 DBG("DIV_FRAC_START: %llu", frac_start);
284 DBG("PLL_CPCTRL: %u", cpctrl);
285 DBG("PLL_RCTRL: %u", rctrl);
286 DBG("PLL_CCTRL: %u", cctrl);
287 DBG("INTEGLOOP_GAIN: %u", integloop_gain);
288 DBG("TX_BAND: %d", pd.tx_band_sel);
289 DBG("PLL_CMP: %u", pll_cmp);
290
291 /* Convert these values to register specific values */
292 if (bclk > HDMI_DIG_FREQ_BIT_CLK_THRESHOLD)
293 cfg->com_svs_mode_clk_sel = 1;
294 else
295 cfg->com_svs_mode_clk_sel = 2;
296
297 cfg->com_hsclk_sel = (0x20 | pd.hsclk_divsel);
298 cfg->com_pll_cctrl_mode0 = cctrl;
299 cfg->com_pll_rctrl_mode0 = rctrl;
300 cfg->com_cp_ctrl_mode0 = cpctrl;
301 cfg->com_dec_start_mode0 = dec_start;
302 cfg->com_div_frac_start1_mode0 = (frac_start & 0xff);
303 cfg->com_div_frac_start2_mode0 = ((frac_start & 0xff00) >> 8);
304 cfg->com_div_frac_start3_mode0 = ((frac_start & 0xf0000) >> 16);
305 cfg->com_integloop_gain0_mode0 = (integloop_gain & 0xff);
306 cfg->com_integloop_gain1_mode0 = ((integloop_gain & 0xf00) >> 8);
307 cfg->com_lock_cmp1_mode0 = (pll_cmp & 0xff);
308 cfg->com_lock_cmp2_mode0 = ((pll_cmp & 0xff00) >> 8);
309 cfg->com_lock_cmp3_mode0 = ((pll_cmp & 0x30000) >> 16);
310 cfg->com_lock_cmp_en = 0x0;
311 cfg->com_core_clk_en = 0x2c;
312 cfg->com_coreclk_div = HDMI_CORECLK_DIV;
313 cfg->phy_mode = (bclk > HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD) ? 0x10 : 0x0;
314 cfg->com_vco_tune_ctrl = 0x0;
315
316 cfg->tx_lx_lane_mode[0] =
317 cfg->tx_lx_lane_mode[2] = 0x43;
318
319 cfg->tx_lx_hp_pd_enables[0] =
320 cfg->tx_lx_hp_pd_enables[1] =
321 cfg->tx_lx_hp_pd_enables[2] = 0x0c;
322 cfg->tx_lx_hp_pd_enables[3] = 0x3;
323
324 for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++)
325 cfg->tx_lx_tx_band[i] = pd.tx_band_sel + 4;
326
327 if (bclk > HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD) {
328 cfg->tx_lx_tx_drv_lvl[0] =
329 cfg->tx_lx_tx_drv_lvl[1] =
330 cfg->tx_lx_tx_drv_lvl[2] = 0x25;
331 cfg->tx_lx_tx_drv_lvl[3] = 0x22;
332
333 cfg->tx_lx_tx_emp_post1_lvl[0] =
334 cfg->tx_lx_tx_emp_post1_lvl[1] =
335 cfg->tx_lx_tx_emp_post1_lvl[2] = 0x23;
336 cfg->tx_lx_tx_emp_post1_lvl[3] = 0x27;
337
338 cfg->tx_lx_vmode_ctrl1[0] =
339 cfg->tx_lx_vmode_ctrl1[1] =
340 cfg->tx_lx_vmode_ctrl1[2] =
341 cfg->tx_lx_vmode_ctrl1[3] = 0x00;
342
343 cfg->tx_lx_vmode_ctrl2[0] =
344 cfg->tx_lx_vmode_ctrl2[1] =
345 cfg->tx_lx_vmode_ctrl2[2] = 0x0D;
346
347 cfg->tx_lx_vmode_ctrl2[3] = 0x00;
348 } else if (bclk > HDMI_MID_FREQ_BIT_CLK_THRESHOLD) {
349 for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
350 cfg->tx_lx_tx_drv_lvl[i] = 0x25;
351 cfg->tx_lx_tx_emp_post1_lvl[i] = 0x23;
352 cfg->tx_lx_vmode_ctrl1[i] = 0x00;
353 }
354
355 cfg->tx_lx_vmode_ctrl2[0] =
356 cfg->tx_lx_vmode_ctrl2[1] =
357 cfg->tx_lx_vmode_ctrl2[2] = 0x0D;
358 cfg->tx_lx_vmode_ctrl2[3] = 0x00;
359 } else {
360 for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
361 cfg->tx_lx_tx_drv_lvl[i] = 0x20;
362 cfg->tx_lx_tx_emp_post1_lvl[i] = 0x20;
363 cfg->tx_lx_vmode_ctrl1[i] = 0x00;
364 cfg->tx_lx_vmode_ctrl2[i] = 0x0E;
365 }
366 }
367
368 DBG("com_svs_mode_clk_sel = 0x%x", cfg->com_svs_mode_clk_sel);
369 DBG("com_hsclk_sel = 0x%x", cfg->com_hsclk_sel);
370 DBG("com_lock_cmp_en = 0x%x", cfg->com_lock_cmp_en);
371 DBG("com_pll_cctrl_mode0 = 0x%x", cfg->com_pll_cctrl_mode0);
372 DBG("com_pll_rctrl_mode0 = 0x%x", cfg->com_pll_rctrl_mode0);
373 DBG("com_cp_ctrl_mode0 = 0x%x", cfg->com_cp_ctrl_mode0);
374 DBG("com_dec_start_mode0 = 0x%x", cfg->com_dec_start_mode0);
375 DBG("com_div_frac_start1_mode0 = 0x%x", cfg->com_div_frac_start1_mode0);
376 DBG("com_div_frac_start2_mode0 = 0x%x", cfg->com_div_frac_start2_mode0);
377 DBG("com_div_frac_start3_mode0 = 0x%x", cfg->com_div_frac_start3_mode0);
378 DBG("com_integloop_gain0_mode0 = 0x%x", cfg->com_integloop_gain0_mode0);
379 DBG("com_integloop_gain1_mode0 = 0x%x", cfg->com_integloop_gain1_mode0);
380 DBG("com_lock_cmp1_mode0 = 0x%x", cfg->com_lock_cmp1_mode0);
381 DBG("com_lock_cmp2_mode0 = 0x%x", cfg->com_lock_cmp2_mode0);
382 DBG("com_lock_cmp3_mode0 = 0x%x", cfg->com_lock_cmp3_mode0);
383 DBG("com_core_clk_en = 0x%x", cfg->com_core_clk_en);
384 DBG("com_coreclk_div = 0x%x", cfg->com_coreclk_div);
385 DBG("phy_mode = 0x%x", cfg->phy_mode);
386
387 DBG("tx_l0_lane_mode = 0x%x", cfg->tx_lx_lane_mode[0]);
388 DBG("tx_l2_lane_mode = 0x%x", cfg->tx_lx_lane_mode[2]);
389
390 for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
391 DBG("tx_l%d_tx_band = 0x%x", i, cfg->tx_lx_tx_band[i]);
392 DBG("tx_l%d_tx_drv_lvl = 0x%x", i, cfg->tx_lx_tx_drv_lvl[i]);
393 DBG("tx_l%d_tx_emp_post1_lvl = 0x%x", i,
394 cfg->tx_lx_tx_emp_post1_lvl[i]);
395 DBG("tx_l%d_vmode_ctrl1 = 0x%x", i, cfg->tx_lx_vmode_ctrl1[i]);
396 DBG("tx_l%d_vmode_ctrl2 = 0x%x", i, cfg->tx_lx_vmode_ctrl2[i]);
397 }
398
399 return 0;
400}
401
402static int hdmi_8996_pll_set_clk_rate(struct clk_hw *hw, unsigned long rate,
403 unsigned long parent_rate)
404{
405 struct hdmi_pll_8996 *pll = hw_clk_to_pll(hw);
406 struct hdmi_phy *phy = pll_get_phy(pll);
407 struct hdmi_8996_phy_pll_reg_cfg cfg;
408 int i, ret;
409
410 memset(&cfg, 0x00, sizeof(cfg));
411
412 ret = pll_calculate(rate, parent_rate, &cfg);
413 if (ret) {
414 DRM_ERROR("PLL calculation failed\n");
415 return ret;
416 }
417
418 /* Initially shut down PHY */
419 DBG("Disabling PHY");
420 hdmi_phy_write(phy, REG_HDMI_8996_PHY_PD_CTL, 0x0);
421 udelay(500);
422
423 /* Power up sequence */
424 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_BG_CTRL, 0x04);
425
426 hdmi_phy_write(phy, REG_HDMI_8996_PHY_PD_CTL, 0x1);
427 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_RESETSM_CNTRL, 0x20);
428 hdmi_phy_write(phy, REG_HDMI_8996_PHY_TX0_TX1_LANE_CTL, 0x0F);
429 hdmi_phy_write(phy, REG_HDMI_8996_PHY_TX2_TX3_LANE_CTL, 0x0F);
430
431 for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
432 hdmi_tx_chan_write(pll, i,
433 REG_HDMI_PHY_QSERDES_TX_LX_CLKBUF_ENABLE,
434 0x03);
435 hdmi_tx_chan_write(pll, i,
436 REG_HDMI_PHY_QSERDES_TX_LX_TX_BAND,
437 cfg.tx_lx_tx_band[i]);
438 hdmi_tx_chan_write(pll, i,
439 REG_HDMI_PHY_QSERDES_TX_LX_RESET_TSYNC_EN,
440 0x03);
441 }
442
443 hdmi_tx_chan_write(pll, 0, REG_HDMI_PHY_QSERDES_TX_LX_LANE_MODE,
444 cfg.tx_lx_lane_mode[0]);
445 hdmi_tx_chan_write(pll, 2, REG_HDMI_PHY_QSERDES_TX_LX_LANE_MODE,
446 cfg.tx_lx_lane_mode[2]);
447
448 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SYSCLK_BUF_ENABLE, 0x1E);
449 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x07);
450 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SYSCLK_EN_SEL, 0x37);
451 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SYS_CLK_CTRL, 0x02);
452 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CLK_ENABLE1, 0x0E);
453
454 /* Bypass VCO calibration */
455 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SVS_MODE_CLK_SEL,
456 cfg.com_svs_mode_clk_sel);
457
458 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_BG_TRIM, 0x0F);
459 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_PLL_IVCO, 0x0F);
460 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_VCO_TUNE_CTRL,
461 cfg.com_vco_tune_ctrl);
462
463 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_BG_CTRL, 0x06);
464
465 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CLK_SELECT, 0x30);
466 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_HSCLK_SEL,
467 cfg.com_hsclk_sel);
468 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP_EN,
469 cfg.com_lock_cmp_en);
470
471 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_PLL_CCTRL_MODE0,
472 cfg.com_pll_cctrl_mode0);
473 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_PLL_RCTRL_MODE0,
474 cfg.com_pll_rctrl_mode0);
475 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CP_CTRL_MODE0,
476 cfg.com_cp_ctrl_mode0);
477 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_DEC_START_MODE0,
478 cfg.com_dec_start_mode0);
479 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_DIV_FRAC_START1_MODE0,
480 cfg.com_div_frac_start1_mode0);
481 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_DIV_FRAC_START2_MODE0,
482 cfg.com_div_frac_start2_mode0);
483 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_DIV_FRAC_START3_MODE0,
484 cfg.com_div_frac_start3_mode0);
485
486 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_INTEGLOOP_GAIN0_MODE0,
487 cfg.com_integloop_gain0_mode0);
488 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_INTEGLOOP_GAIN1_MODE0,
489 cfg.com_integloop_gain1_mode0);
490
491 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP1_MODE0,
492 cfg.com_lock_cmp1_mode0);
493 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP2_MODE0,
494 cfg.com_lock_cmp2_mode0);
495 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP3_MODE0,
496 cfg.com_lock_cmp3_mode0);
497
498 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_VCO_TUNE_MAP, 0x00);
499 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CORE_CLK_EN,
500 cfg.com_core_clk_en);
501 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CORECLK_DIV,
502 cfg.com_coreclk_div);
503 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CMN_CONFIG, 0x02);
504
505 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_RESCODE_DIV_NUM, 0x15);
506
507 /* TX lanes setup (TX 0/1/2/3) */
508 for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
509 hdmi_tx_chan_write(pll, i,
510 REG_HDMI_PHY_QSERDES_TX_LX_TX_DRV_LVL,
511 cfg.tx_lx_tx_drv_lvl[i]);
512 hdmi_tx_chan_write(pll, i,
513 REG_HDMI_PHY_QSERDES_TX_LX_TX_EMP_POST1_LVL,
514 cfg.tx_lx_tx_emp_post1_lvl[i]);
515 hdmi_tx_chan_write(pll, i,
516 REG_HDMI_PHY_QSERDES_TX_LX_VMODE_CTRL1,
517 cfg.tx_lx_vmode_ctrl1[i]);
518 hdmi_tx_chan_write(pll, i,
519 REG_HDMI_PHY_QSERDES_TX_LX_VMODE_CTRL2,
520 cfg.tx_lx_vmode_ctrl2[i]);
521 hdmi_tx_chan_write(pll, i,
522 REG_HDMI_PHY_QSERDES_TX_LX_TX_DRV_LVL_OFFSET,
523 0x00);
524 hdmi_tx_chan_write(pll, i,
525 REG_HDMI_PHY_QSERDES_TX_LX_RES_CODE_LANE_OFFSET,
526 0x00);
527 hdmi_tx_chan_write(pll, i,
528 REG_HDMI_PHY_QSERDES_TX_LX_TRAN_DRVR_EMP_EN,
529 0x03);
530 hdmi_tx_chan_write(pll, i,
531 REG_HDMI_PHY_QSERDES_TX_LX_PARRATE_REC_DETECT_IDLE_EN,
532 0x40);
533 hdmi_tx_chan_write(pll, i,
534 REG_HDMI_PHY_QSERDES_TX_LX_HP_PD_ENABLES,
535 cfg.tx_lx_hp_pd_enables[i]);
536 }
537
538 hdmi_phy_write(phy, REG_HDMI_8996_PHY_MODE, cfg.phy_mode);
539 hdmi_phy_write(phy, REG_HDMI_8996_PHY_PD_CTL, 0x1F);
540
541 /*
542 * Ensure that vco configuration gets flushed to hardware before
543 * enabling the PLL
544 */
545 wmb();
546
547 return 0;
548}
549
550static int hdmi_8996_phy_ready_status(struct hdmi_phy *phy)
551{
552 u32 nb_tries = HDMI_PLL_POLL_MAX_READS;
553 unsigned long timeout = HDMI_PLL_POLL_TIMEOUT_US;
554 u32 status;
555 int phy_ready = 0;
556
557 DBG("Waiting for PHY ready");
558
559 while (nb_tries--) {
560 status = hdmi_phy_read(phy, REG_HDMI_8996_PHY_STATUS);
561 phy_ready = status & BIT(0);
562
563 if (phy_ready)
564 break;
565
566 udelay(timeout);
567 }
568
569 DBG("PHY is %sready", phy_ready ? "" : "*not* ");
570
571 return phy_ready;
572}
573
574static int hdmi_8996_pll_lock_status(struct hdmi_pll_8996 *pll)
575{
576 u32 status;
577 int nb_tries = HDMI_PLL_POLL_MAX_READS;
578 unsigned long timeout = HDMI_PLL_POLL_TIMEOUT_US;
579 int pll_locked = 0;
580
581 DBG("Waiting for PLL lock");
582
583 while (nb_tries--) {
584 status = hdmi_pll_read(pll,
585 REG_HDMI_PHY_QSERDES_COM_C_READY_STATUS);
586 pll_locked = status & BIT(0);
587
588 if (pll_locked)
589 break;
590
591 udelay(timeout);
592 }
593
594 DBG("HDMI PLL is %slocked", pll_locked ? "" : "*not* ");
595
596 return pll_locked;
597}
598
599static int hdmi_8996_pll_prepare(struct clk_hw *hw)
600{
601 struct hdmi_pll_8996 *pll = hw_clk_to_pll(hw);
602 struct hdmi_phy *phy = pll_get_phy(pll);
603 int i, ret = 0;
604
605 hdmi_phy_write(phy, REG_HDMI_8996_PHY_CFG, 0x1);
606 udelay(100);
607
608 hdmi_phy_write(phy, REG_HDMI_8996_PHY_CFG, 0x19);
609 udelay(100);
610
611 ret = hdmi_8996_pll_lock_status(pll);
612 if (!ret)
613 return ret;
614
615 for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++)
616 hdmi_tx_chan_write(pll, i,
617 REG_HDMI_PHY_QSERDES_TX_LX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN,
618 0x6F);
619
620 /* Disable SSC */
621 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_PER1, 0x0);
622 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_PER2, 0x0);
623 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_STEP_SIZE1, 0x0);
624 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_STEP_SIZE2, 0x0);
625 hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_EN_CENTER, 0x2);
626
627 ret = hdmi_8996_phy_ready_status(phy);
628 if (!ret)
629 return ret;
630
631 /* Restart the retiming buffer */
632 hdmi_phy_write(phy, REG_HDMI_8996_PHY_CFG, 0x18);
633 udelay(1);
634 hdmi_phy_write(phy, REG_HDMI_8996_PHY_CFG, 0x19);
635
636 return 0;
637}
638
639static long hdmi_8996_pll_round_rate(struct clk_hw *hw,
640 unsigned long rate,
641 unsigned long *parent_rate)
642{
643 if (rate < HDMI_PCLK_MIN_FREQ)
644 return HDMI_PCLK_MIN_FREQ;
645 else if (rate > HDMI_PCLK_MAX_FREQ)
646 return HDMI_PCLK_MAX_FREQ;
647 else
648 return rate;
649}
650
651static unsigned long hdmi_8996_pll_recalc_rate(struct clk_hw *hw,
652 unsigned long parent_rate)
653{
654 struct hdmi_pll_8996 *pll = hw_clk_to_pll(hw);
655 u64 fdata;
656 u32 cmp1, cmp2, cmp3, pll_cmp;
657
658 cmp1 = hdmi_pll_read(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP1_MODE0);
659 cmp2 = hdmi_pll_read(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP2_MODE0);
660 cmp3 = hdmi_pll_read(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP3_MODE0);
661
662 pll_cmp = cmp1 | (cmp2 << 8) | (cmp3 << 16);
663
664 fdata = pll_cmp_to_fdata(pll_cmp + 1, parent_rate);
665
666 do_div(fdata, 10);
667
668 return fdata;
669}
670
671static void hdmi_8996_pll_unprepare(struct clk_hw *hw)
672{
673}
674
675static int hdmi_8996_pll_is_enabled(struct clk_hw *hw)
676{
677 struct hdmi_pll_8996 *pll = hw_clk_to_pll(hw);
678 u32 status;
679 int pll_locked;
680
681 status = hdmi_pll_read(pll, REG_HDMI_PHY_QSERDES_COM_C_READY_STATUS);
682 pll_locked = status & BIT(0);
683
684 return pll_locked;
685}
686
687static struct clk_ops hdmi_8996_pll_ops = {
688 .set_rate = hdmi_8996_pll_set_clk_rate,
689 .round_rate = hdmi_8996_pll_round_rate,
690 .recalc_rate = hdmi_8996_pll_recalc_rate,
691 .prepare = hdmi_8996_pll_prepare,
692 .unprepare = hdmi_8996_pll_unprepare,
693 .is_enabled = hdmi_8996_pll_is_enabled,
694};
695
696static const char * const hdmi_pll_parents[] = {
697 "xo",
698};
699
700static struct clk_init_data pll_init = {
701 .name = "hdmipll",
702 .ops = &hdmi_8996_pll_ops,
703 .parent_names = hdmi_pll_parents,
704 .num_parents = ARRAY_SIZE(hdmi_pll_parents),
705 .flags = CLK_IGNORE_UNUSED,
706};
707
708int msm_hdmi_pll_8996_init(struct platform_device *pdev)
709{
710 struct device *dev = &pdev->dev;
711 struct hdmi_pll_8996 *pll;
712 struct clk *clk;
713 int i;
714
715 pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL);
716 if (!pll)
717 return -ENOMEM;
718
719 pll->pdev = pdev;
720
721 pll->mmio_qserdes_com = msm_ioremap(pdev, "hdmi_pll", "HDMI_PLL");
722 if (IS_ERR(pll->mmio_qserdes_com)) {
723 dev_err(dev, "failed to map pll base\n");
724 return -ENOMEM;
725 }
726
727 for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
728 char name[32], label[32];
729
730 snprintf(name, sizeof(name), "hdmi_tx_l%d", i);
731 snprintf(label, sizeof(label), "HDMI_TX_L%d", i);
732
733 pll->mmio_qserdes_tx[i] = msm_ioremap(pdev, name, label);
734 if (IS_ERR(pll->mmio_qserdes_tx[i])) {
735 dev_err(dev, "failed to map pll base\n");
736 return -ENOMEM;
737 }
738 }
739 pll->clk_hw.init = &pll_init;
740
741 clk = devm_clk_register(dev, &pll->clk_hw);
742 if (IS_ERR(clk)) {
743 dev_err(dev, "failed to register pll clock\n");
744 return -EINVAL;
745 }
746
747 return 0;
748}
749
750static const char * const hdmi_phy_8996_reg_names[] = {
751 "vddio",
752 "vcca",
753};
754
755static const char * const hdmi_phy_8996_clk_names[] = {
756 "mmagic_iface_clk",
757 "iface_clk",
758 "ref_clk",
759};
760
761const struct hdmi_phy_cfg msm_hdmi_phy_8996_cfg = {
762 .type = MSM_HDMI_PHY_8996,
763 .reg_names = hdmi_phy_8996_reg_names,
764 .num_regs = ARRAY_SIZE(hdmi_phy_8996_reg_names),
765 .clk_names = hdmi_phy_8996_clk_names,
766 .num_clks = ARRAY_SIZE(hdmi_phy_8996_clk_names),
767};