kernel/drivers/clk/qcom/lcc-ipq806x.c

   1 /*
   2  * Copyright (c) 2014, The Linux Foundation. All rights reserved.
   3  *
   4  * This software is licensed under the terms of the GNU General Public
   5  * License version 2, as published by the Free Software Foundation, and
   6  * may be copied, distributed, and modified under those terms.
   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/kernel.h>
  15 #include <linux/bitops.h>
  16 #include <linux/err.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/module.h>
  19 #include <linux/of.h>
  20 #include <linux/of_device.h>
  21 #include <linux/clk-provider.h>
  22 #include <linux/regmap.h>
  23
  24 #include <dt-bindings/clock/qcom,lcc-ipq806x.h>
  25
  26 #include "common.h"
  27 #include "clk-regmap.h"
  28 #include "clk-pll.h"
  29 #include "clk-rcg.h"
  30 #include "clk-branch.h"
  31 #include "clk-regmap-divider.h"
  32 #include "clk-regmap-mux.h"
  33
  34 static struct clk_pll pll4 = {
  35         .l_reg = 0x4,
  36         .m_reg = 0x8,
  37         .n_reg = 0xc,
  38         .config_reg = 0x14,
  39         .mode_reg = 0x0,
  40         .status_reg = 0x18,
  41         .status_bit = 16,
  42         .clkr.hw.init = &(struct clk_init_data){
  43                 .name = "pll4",
  44                 .parent_names = (const char *[]){ "pxo" },
  45                 .num_parents = 1,
  46                 .ops = &clk_pll_ops,
  47         },
  48 };
  49
  50 static const struct pll_config pll4_config = {
  51         .l = 0xf,
  52         .m = 0x91,
  53         .n = 0xc7,
  54         .vco_val = 0x0,
  55         .vco_mask = BIT(17) | BIT(16),
  56         .pre_div_val = 0x0,
  57         .pre_div_mask = BIT(19),
  58         .post_div_val = 0x0,
  59         .post_div_mask = BIT(21) | BIT(20),
  60         .mn_ena_mask = BIT(22),
  61         .main_output_mask = BIT(23),
  62 };
  63
  64 enum {
  65         P_PXO,
  66         P_PLL4,
  67 };
  68
  69 static const struct parent_map lcc_pxo_pll4_map[] = {
  70         { P_PXO, 0 },
  71         { P_PLL4, 2 }
  72 };
  73
  74 static const char *lcc_pxo_pll4[] = {
  75         "pxo",
  76         "pll4_vote",
  77 };
  78
  79 static struct freq_tbl clk_tbl_aif_mi2s[] = {
  80         {  1024000, P_PLL4, 4,  1,  96 },
  81         {  1411200, P_PLL4, 4,  2, 139 },
  82         {  1536000, P_PLL4, 4,  1,  64 },
  83         {  2048000, P_PLL4, 4,  1,  48 },
  84         {  2116800, P_PLL4, 4,  2,  93 },
  85         {  2304000, P_PLL4, 4,  2,  85 },
  86         {  2822400, P_PLL4, 4,  6, 209 },
  87         {  3072000, P_PLL4, 4,  1,  32 },
  88         {  3175200, P_PLL4, 4,  1,  31 },
  89         {  4096000, P_PLL4, 4,  1,  24 },
  90         {  4233600, P_PLL4, 4,  9, 209 },
  91         {  4608000, P_PLL4, 4,  3,  64 },
  92         {  5644800, P_PLL4, 4, 12, 209 },
  93         {  6144000, P_PLL4, 4,  1,  16 },
  94         {  6350400, P_PLL4, 4,  2,  31 },
  95         {  8192000, P_PLL4, 4,  1,  12 },
  96         {  8467200, P_PLL4, 4, 18, 209 },
  97         {  9216000, P_PLL4, 4,  3,  32 },
  98         { 11289600, P_PLL4, 4, 24, 209 },
  99         { 12288000, P_PLL4, 4,  1,   8 },
 100         { 12700800, P_PLL4, 4, 27, 209 },
 101         { 13824000, P_PLL4, 4,  9,  64 },
 102         { 16384000, P_PLL4, 4,  1,   6 },
 103         { 16934400, P_PLL4, 4, 41, 238 },
 104         { 18432000, P_PLL4, 4,  3,  16 },
 105         { 22579200, P_PLL4, 2, 24, 209 },
 106         { 24576000, P_PLL4, 4,  1,   4 },
 107         { 27648000, P_PLL4, 4,  9,  32 },
 108         { 33868800, P_PLL4, 4, 41, 119 },
 109         { 36864000, P_PLL4, 4,  3,   8 },
 110         { 45158400, P_PLL4, 1, 24, 209 },
 111         { 49152000, P_PLL4, 4,  1,   2 },
 112         { 50803200, P_PLL4, 1, 27, 209 },
 113         { }
 114 };
 115
 116 static struct clk_rcg mi2s_osr_src = {
 117         .ns_reg = 0x48,
 118         .md_reg = 0x4c,
 119         .mn = {
 120                 .mnctr_en_bit = 8,
 121                 .mnctr_reset_bit = 7,
 122                 .mnctr_mode_shift = 5,
 123                 .n_val_shift = 24,
 124                 .m_val_shift = 8,
 125                 .width = 8,
 126         },
 127         .p = {
 128                 .pre_div_shift = 3,
 129                 .pre_div_width = 2,
 130         },
 131         .s = {
 132                 .src_sel_shift = 0,
 133                 .parent_map = lcc_pxo_pll4_map,
 134         },
 135         .freq_tbl = clk_tbl_aif_mi2s,
 136         .clkr = {
 137                 .enable_reg = 0x48,
 138                 .enable_mask = BIT(9),
 139                 .hw.init = &(struct clk_init_data){
 140                         .name = "mi2s_osr_src",
 141                         .parent_names = lcc_pxo_pll4,
 142                         .num_parents = 2,
 143                         .ops = &clk_rcg_ops,
 144                         .flags = CLK_SET_RATE_GATE,
 145                 },
 146         },
 147 };
 148
 149 static const char *lcc_mi2s_parents[] = {
 150         "mi2s_osr_src",
 151 };
 152
 153 static struct clk_branch mi2s_osr_clk = {
 154         .halt_reg = 0x50,
 155         .halt_bit = 1,
 156         .halt_check = BRANCH_HALT_ENABLE,
 157         .clkr = {
 158                 .enable_reg = 0x48,
 159                 .enable_mask = BIT(17),
 160                 .hw.init = &(struct clk_init_data){
 161                         .name = "mi2s_osr_clk",
 162                         .parent_names = lcc_mi2s_parents,
 163                         .num_parents = 1,
 164                         .ops = &clk_branch_ops,
 165                         .flags = CLK_SET_RATE_PARENT,
 166                 },
 167         },
 168 };
 169
 170 static struct clk_regmap_div mi2s_div_clk = {
 171         .reg = 0x48,
 172         .shift = 10,
 173         .width = 4,
 174         .clkr = {
 175                 .hw.init = &(struct clk_init_data){
 176                         .name = "mi2s_div_clk",
 177                         .parent_names = lcc_mi2s_parents,
 178                         .num_parents = 1,
 179                         .ops = &clk_regmap_div_ops,
 180                 },
 181         },
 182 };
 183
 184 static struct clk_branch mi2s_bit_div_clk = {
 185         .halt_reg = 0x50,
 186         .halt_bit = 0,
 187         .halt_check = BRANCH_HALT_ENABLE,
 188         .clkr = {
 189                 .enable_reg = 0x48,
 190                 .enable_mask = BIT(15),
 191                 .hw.init = &(struct clk_init_data){
 192                         .name = "mi2s_bit_div_clk",
 193                         .parent_names = (const char *[]){ "mi2s_div_clk" },
 194                         .num_parents = 1,
 195                         .ops = &clk_branch_ops,
 196                         .flags = CLK_SET_RATE_PARENT,
 197                 },
 198         },
 199 };
 200
 201
 202 static struct clk_regmap_mux mi2s_bit_clk = {
 203         .reg = 0x48,
 204         .shift = 14,
 205         .width = 1,
 206         .clkr = {
 207                 .hw.init = &(struct clk_init_data){
 208                         .name = "mi2s_bit_clk",
 209                         .parent_names = (const char *[]){
 210                                 "mi2s_bit_div_clk",
 211                                 "mi2s_codec_clk",
 212                         },
 213                         .num_parents = 2,
 214                         .ops = &clk_regmap_mux_closest_ops,
 215                         .flags = CLK_SET_RATE_PARENT,
 216                 },
 217         },
 218 };
 219
 220 static struct freq_tbl clk_tbl_pcm[] = {
 221         {   64000, P_PLL4, 4, 1, 1536 },
 222         {  128000, P_PLL4, 4, 1,  768 },
 223         {  256000, P_PLL4, 4, 1,  384 },
 224         {  512000, P_PLL4, 4, 1,  192 },
 225         { 1024000, P_PLL4, 4, 1,   96 },
 226         { 2048000, P_PLL4, 4, 1,   48 },
 227         { },
 228 };
 229
 230 static struct clk_rcg pcm_src = {
 231         .ns_reg = 0x54,
 232         .md_reg = 0x58,
 233         .mn = {
 234                 .mnctr_en_bit = 8,
 235                 .mnctr_reset_bit = 7,
 236                 .mnctr_mode_shift = 5,
 237                 .n_val_shift = 16,
 238                 .m_val_shift = 16,
 239                 .width = 16,
 240         },
 241         .p = {
 242                 .pre_div_shift = 3,
 243                 .pre_div_width = 2,
 244         },
 245         .s = {
 246                 .src_sel_shift = 0,
 247                 .parent_map = lcc_pxo_pll4_map,
 248         },
 249         .freq_tbl = clk_tbl_pcm,
 250         .clkr = {
 251                 .enable_reg = 0x54,
 252                 .enable_mask = BIT(9),
 253                 .hw.init = &(struct clk_init_data){
 254                         .name = "pcm_src",
 255                         .parent_names = lcc_pxo_pll4,
 256                         .num_parents = 2,
 257                         .ops = &clk_rcg_ops,
 258                         .flags = CLK_SET_RATE_GATE,
 259                 },
 260         },
 261 };
 262
 263 static struct clk_branch pcm_clk_out = {
 264         .halt_reg = 0x5c,
 265         .halt_bit = 0,
 266         .halt_check = BRANCH_HALT_ENABLE,
 267         .clkr = {
 268                 .enable_reg = 0x54,
 269                 .enable_mask = BIT(11),
 270                 .hw.init = &(struct clk_init_data){
 271                         .name = "pcm_clk_out",
 272                         .parent_names = (const char *[]){ "pcm_src" },
 273                         .num_parents = 1,
 274                         .ops = &clk_branch_ops,
 275                         .flags = CLK_SET_RATE_PARENT,
 276                 },
 277         },
 278 };
 279
 280 static struct clk_regmap_mux pcm_clk = {
 281         .reg = 0x54,
 282         .shift = 10,
 283         .width = 1,
 284         .clkr = {
 285                 .hw.init = &(struct clk_init_data){
 286                         .name = "pcm_clk",
 287                         .parent_names = (const char *[]){
 288                                 "pcm_clk_out",
 289                                 "pcm_codec_clk",
 290                         },
 291                         .num_parents = 2,
 292                         .ops = &clk_regmap_mux_closest_ops,
 293                         .flags = CLK_SET_RATE_PARENT,
 294                 },
 295         },
 296 };
 297
 298 static struct freq_tbl clk_tbl_aif_osr[] = {
 299         {  2822400, P_PLL4, 1, 147, 20480 },
 300         {  4096000, P_PLL4, 1,   1,    96 },
 301         {  5644800, P_PLL4, 1, 147, 10240 },
 302         {  6144000, P_PLL4, 1,   1,    64 },
 303         { 11289600, P_PLL4, 1, 147,  5120 },
 304         { 12288000, P_PLL4, 1,   1,    32 },
 305         { 22579200, P_PLL4, 1, 147,  2560 },
 306         { 24576000, P_PLL4, 1,   1,    16 },
 307         { },
 308 };
 309
 310 static struct clk_rcg spdif_src = {
 311         .ns_reg = 0xcc,
 312         .md_reg = 0xd0,
 313         .mn = {
 314                 .mnctr_en_bit = 8,
 315                 .mnctr_reset_bit = 7,
 316                 .mnctr_mode_shift = 5,
 317                 .n_val_shift = 16,
 318                 .m_val_shift = 16,
 319                 .width = 8,
 320         },
 321         .p = {
 322                 .pre_div_shift = 3,
 323                 .pre_div_width = 2,
 324         },
 325         .s = {
 326                 .src_sel_shift = 0,
 327                 .parent_map = lcc_pxo_pll4_map,
 328         },
 329         .freq_tbl = clk_tbl_aif_osr,
 330         .clkr = {
 331                 .enable_reg = 0xcc,
 332                 .enable_mask = BIT(9),
 333                 .hw.init = &(struct clk_init_data){
 334                         .name = "spdif_src",
 335                         .parent_names = lcc_pxo_pll4,
 336                         .num_parents = 2,
 337                         .ops = &clk_rcg_ops,
 338                         .flags = CLK_SET_RATE_GATE,
 339                 },
 340         },
 341 };
 342
 343 static const char *lcc_spdif_parents[] = {
 344         "spdif_src",
 345 };
 346
 347 static struct clk_branch spdif_clk = {
 348         .halt_reg = 0xd4,
 349         .halt_bit = 1,
 350         .halt_check = BRANCH_HALT_ENABLE,
 351         .clkr = {
 352                 .enable_reg = 0xcc,
 353                 .enable_mask = BIT(12),
 354                 .hw.init = &(struct clk_init_data){
 355                         .name = "spdif_clk",
 356                         .parent_names = lcc_spdif_parents,
 357                         .num_parents = 1,
 358                         .ops = &clk_branch_ops,
 359                         .flags = CLK_SET_RATE_PARENT,
 360                 },
 361         },
 362 };
 363
 364 static struct freq_tbl clk_tbl_ahbix[] = {
 365         { 131072000, P_PLL4, 1, 1, 3 },
 366         { },
 367 };
 368
 369 static struct clk_rcg ahbix_clk = {
 370         .ns_reg = 0x38,
 371         .md_reg = 0x3c,
 372         .mn = {
 373                 .mnctr_en_bit = 8,
 374                 .mnctr_reset_bit = 7,
 375                 .mnctr_mode_shift = 5,
 376                 .n_val_shift = 24,
 377                 .m_val_shift = 8,
 378                 .width = 8,
 379         },
 380         .p = {
 381                 .pre_div_shift = 3,
 382                 .pre_div_width = 2,
 383         },
 384         .s = {
 385                 .src_sel_shift = 0,
 386                 .parent_map = lcc_pxo_pll4_map,
 387         },
 388         .freq_tbl = clk_tbl_ahbix,
 389         .clkr = {
 390                 .enable_reg = 0x38,
 391                 .enable_mask = BIT(11),
 392                 .hw.init = &(struct clk_init_data){
 393                         .name = "ahbix",
 394                         .parent_names = lcc_pxo_pll4,
 395                         .num_parents = 2,
 396                         .ops = &clk_rcg_lcc_ops,
 397                 },
 398         },
 399 };
 400
 401 static struct clk_regmap *lcc_ipq806x_clks[] = {
 402         [PLL4] = &pll4.clkr,
 403         [MI2S_OSR_SRC] = &mi2s_osr_src.clkr,
 404         [MI2S_OSR_CLK] = &mi2s_osr_clk.clkr,
 405         [MI2S_DIV_CLK] = &mi2s_div_clk.clkr,
 406         [MI2S_BIT_DIV_CLK] = &mi2s_bit_div_clk.clkr,
 407         [MI2S_BIT_CLK] = &mi2s_bit_clk.clkr,
 408         [PCM_SRC] = &pcm_src.clkr,
 409         [PCM_CLK_OUT] = &pcm_clk_out.clkr,
 410         [PCM_CLK] = &pcm_clk.clkr,
 411         [SPDIF_SRC] = &spdif_src.clkr,
 412         [SPDIF_CLK] = &spdif_clk.clkr,
 413         [AHBIX_CLK] = &ahbix_clk.clkr,
 414 };
 415
 416 static const struct regmap_config lcc_ipq806x_regmap_config = {
 417         .reg_bits       = 32,
 418         .reg_stride     = 4,
 419         .val_bits       = 32,
 420         .max_register   = 0xfc,
 421         .fast_io        = true,
 422 };
 423
 424 static const struct qcom_cc_desc lcc_ipq806x_desc = {
 425         .config = &lcc_ipq806x_regmap_config,
 426         .clks = lcc_ipq806x_clks,
 427         .num_clks = ARRAY_SIZE(lcc_ipq806x_clks),
 428 };
 429
 430 static const struct of_device_id lcc_ipq806x_match_table[] = {
 431         { .compatible = "qcom,lcc-ipq8064" },
 432         { }
 433 };
 434 MODULE_DEVICE_TABLE(of, lcc_ipq806x_match_table);
 435
 436 static int lcc_ipq806x_probe(struct platform_device *pdev)
 437 {
 438         u32 val;
 439         struct regmap *regmap;
 440
 441         regmap = qcom_cc_map(pdev, &lcc_ipq806x_desc);
 442         if (IS_ERR(regmap))
 443                 return PTR_ERR(regmap);
 444
 445         /* Configure the rate of PLL4 if the bootloader hasn't already */
 446         val = regmap_read(regmap, 0x0, &val);
 447         if (!val)
 448                 clk_pll_configure_sr(&pll4, regmap, &pll4_config, true);
 449         /* Enable PLL4 source on the LPASS Primary PLL Mux */
 450         regmap_write(regmap, 0xc4, 0x1);
 451
 452         return qcom_cc_really_probe(pdev, &lcc_ipq806x_desc, regmap);
 453 }
 454
 455 static int lcc_ipq806x_remove(struct platform_device *pdev)
 456 {
 457         qcom_cc_remove(pdev);
 458         return 0;
 459 }
 460
 461 static struct platform_driver lcc_ipq806x_driver = {
 462         .probe          = lcc_ipq806x_probe,
 463         .remove         = lcc_ipq806x_remove,
 464         .driver         = {
 465                 .name   = "lcc-ipq806x",
 466                 .of_match_table = lcc_ipq806x_match_table,
 467         },
 468 };
 469 module_platform_driver(lcc_ipq806x_driver);
 470
 471 MODULE_DESCRIPTION("QCOM LCC IPQ806x Driver");
 472 MODULE_LICENSE("GPL v2");
 473 MODULE_ALIAS("platform:lcc-ipq806x");