drivers/clk/qcom/gpucc-sdm660.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2020, The Linux Foundation. All rights reserved.
   4  * Copyright (c) 2020, AngeloGioacchino Del Regno
   5  *                     <angelogioacchino.delregno@somainline.org>
   6  */
   7
   8 #include <linux/bitops.h>
   9 #include <linux/clk.h>
  10 #include <linux/clk-provider.h>
  11 #include <linux/err.h>
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/of.h>
  16 #include <linux/regmap.h>
  17 #include <linux/reset-controller.h>
  18 #include <dt-bindings/clock/qcom,gpucc-sdm660.h>
  19
  20 #include "clk-alpha-pll.h"
  21 #include "common.h"
  22 #include "clk-regmap.h"
  23 #include "clk-pll.h"
  24 #include "clk-rcg.h"
  25 #include "clk-branch.h"
  26 #include "gdsc.h"
  27 #include "reset.h"
  28
  29 enum {
  30         P_GPU_XO,
  31         P_GPLL0_OUT_MAIN,
  32         P_GPLL0_OUT_MAIN_DIV,
  33         P_GPU_PLL0_PLL_OUT_MAIN,
  34         P_GPU_PLL1_PLL_OUT_MAIN,
  35 };
  36
  37 static struct clk_branch gpucc_cxo_clk = {
  38         .halt_reg = 0x1020,
  39         .clkr = {
  40                 .enable_reg = 0x1020,
  41                 .enable_mask = BIT(0),
  42                 .hw.init = &(struct clk_init_data){
  43                         .name = "gpucc_cxo_clk",
  44                         .parent_data = &(const struct clk_parent_data){
  45                                 .fw_name = "xo"
  46                         },
  47                         .num_parents = 1,
  48                         .ops = &clk_branch2_ops,
  49                         .flags = CLK_IS_CRITICAL,
  50                 },
  51         },
  52 };
  53
  54 static const struct pll_vco gpu_vco[] = {
  55         { 1000000000, 2000000000, 0 },
  56         { 500000000,  1000000000, 2 },
  57         { 250000000,   500000000, 3 },
  58 };
  59
  60 static struct clk_alpha_pll gpu_pll0_pll_out_main = {
  61         .offset = 0x0,
  62         .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
  63         .vco_table = gpu_vco,
  64         .num_vco = ARRAY_SIZE(gpu_vco),
  65         .clkr.hw.init = &(struct clk_init_data){
  66                 .name = "gpu_pll0_pll_out_main",
  67                 .parent_hws = (const struct clk_hw*[]){
  68                         &gpucc_cxo_clk.clkr.hw,
  69                 },
  70                 .num_parents = 1,
  71                 .ops = &clk_alpha_pll_ops,
  72         },
  73 };
  74
  75 static struct clk_alpha_pll gpu_pll1_pll_out_main = {
  76         .offset = 0x40,
  77         .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
  78         .vco_table = gpu_vco,
  79         .num_vco = ARRAY_SIZE(gpu_vco),
  80         .clkr.hw.init = &(struct clk_init_data){
  81                 .name = "gpu_pll1_pll_out_main",
  82                 .parent_hws = (const struct clk_hw*[]){
  83                         &gpucc_cxo_clk.clkr.hw,
  84                 },
  85                 .num_parents = 1,
  86                 .ops = &clk_alpha_pll_ops,
  87         },
  88 };
  89
  90 static const struct parent_map gpucc_parent_map_1[] = {
  91         { P_GPU_XO, 0 },
  92         { P_GPU_PLL0_PLL_OUT_MAIN, 1 },
  93         { P_GPU_PLL1_PLL_OUT_MAIN, 3 },
  94         { P_GPLL0_OUT_MAIN, 5 },
  95 };
  96
  97 static const struct clk_parent_data gpucc_parent_data_1[] = {
  98         { .hw = &gpucc_cxo_clk.clkr.hw },
  99         { .hw = &gpu_pll0_pll_out_main.clkr.hw },
 100         { .hw = &gpu_pll1_pll_out_main.clkr.hw },
 101         { .fw_name = "gcc_gpu_gpll0_clk" },
 102 };
 103
 104 static struct clk_rcg2_gfx3d gfx3d_clk_src = {
 105         .div = 2,
 106         .rcg = {
 107                 .cmd_rcgr = 0x1070,
 108                 .mnd_width = 0,
 109                 .hid_width = 5,
 110                 .parent_map = gpucc_parent_map_1,
 111                 .clkr.hw.init = &(struct clk_init_data){
 112                         .name = "gfx3d_clk_src",
 113                         .parent_data = gpucc_parent_data_1,
 114                         .num_parents = ARRAY_SIZE(gpucc_parent_data_1),
 115                         .ops = &clk_gfx3d_ops,
 116                         .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
 117                 },
 118         },
 119         .hws = (struct clk_hw*[]){
 120                 &gpucc_cxo_clk.clkr.hw,
 121                 &gpu_pll0_pll_out_main.clkr.hw,
 122                 &gpu_pll1_pll_out_main.clkr.hw,
 123         }
 124 };
 125
 126 static struct clk_branch gpucc_gfx3d_clk = {
 127         .halt_reg = 0x1098,
 128         .halt_check = BRANCH_HALT,
 129         .hwcg_reg = 0x1098,
 130         .hwcg_bit = 1,
 131         .clkr = {
 132                 .enable_reg = 0x1098,
 133                 .enable_mask = BIT(0),
 134                 .hw.init = &(struct clk_init_data){
 135                         .name = "gpucc_gfx3d_clk",
 136                         .parent_hws = (const struct clk_hw*[]){
 137                                 &gfx3d_clk_src.rcg.clkr.hw,
 138                         },
 139                         .num_parents = 1,
 140                         .ops = &clk_branch2_ops,
 141                         .flags = CLK_SET_RATE_PARENT,
 142                 },
 143         },
 144 };
 145
 146 static const struct parent_map gpucc_parent_map_0[] = {
 147         { P_GPU_XO, 0 },
 148         { P_GPLL0_OUT_MAIN, 5 },
 149         { P_GPLL0_OUT_MAIN_DIV, 6 },
 150 };
 151
 152 static const struct clk_parent_data gpucc_parent_data_0[] = {
 153         { .hw = &gpucc_cxo_clk.clkr.hw },
 154         { .fw_name = "gcc_gpu_gpll0_clk" },
 155         { .fw_name = "gcc_gpu_gpll0_div_clk" },
 156 };
 157
 158 static const struct freq_tbl ftbl_rbbmtimer_clk_src[] = {
 159         F(19200000, P_GPU_XO, 1, 0, 0),
 160         { }
 161 };
 162
 163 static struct clk_rcg2 rbbmtimer_clk_src = {
 164         .cmd_rcgr = 0x10b0,
 165         .mnd_width = 0,
 166         .hid_width = 5,
 167         .parent_map = gpucc_parent_map_0,
 168         .freq_tbl = ftbl_rbbmtimer_clk_src,
 169         .clkr.hw.init = &(struct clk_init_data){
 170                 .name = "rbbmtimer_clk_src",
 171                 .parent_data = gpucc_parent_data_0,
 172                 .num_parents = ARRAY_SIZE(gpucc_parent_data_0),
 173                 .ops = &clk_rcg2_ops,
 174         },
 175 };
 176
 177 static const struct freq_tbl ftbl_rbcpr_clk_src[] = {
 178         F(19200000, P_GPU_XO, 1, 0, 0),
 179         F(50000000, P_GPLL0_OUT_MAIN_DIV, 6, 0, 0),
 180         { }
 181 };
 182
 183 static struct clk_rcg2 rbcpr_clk_src = {
 184         .cmd_rcgr = 0x1030,
 185         .mnd_width = 0,
 186         .hid_width = 5,
 187         .parent_map = gpucc_parent_map_0,
 188         .freq_tbl = ftbl_rbcpr_clk_src,
 189         .clkr.hw.init = &(struct clk_init_data){
 190                 .name = "rbcpr_clk_src",
 191                 .parent_data = gpucc_parent_data_0,
 192                 .num_parents = ARRAY_SIZE(gpucc_parent_data_0),
 193                 .ops = &clk_rcg2_ops,
 194         },
 195 };
 196
 197 static struct clk_branch gpucc_rbbmtimer_clk = {
 198         .halt_reg = 0x10d0,
 199         .halt_check = BRANCH_HALT,
 200         .clkr = {
 201                 .enable_reg = 0x10d0,
 202                 .enable_mask = BIT(0),
 203                 .hw.init = &(struct clk_init_data){
 204                         .name = "gpucc_rbbmtimer_clk",
 205                         .parent_hws = (const struct clk_hw*[]){
 206                                 &rbbmtimer_clk_src.clkr.hw,
 207                         },
 208                         .num_parents = 1,
 209                         .flags = CLK_SET_RATE_PARENT,
 210                         .ops = &clk_branch2_ops,
 211                 },
 212         },
 213 };
 214
 215 static struct clk_branch gpucc_rbcpr_clk = {
 216         .halt_reg = 0x1054,
 217         .halt_check = BRANCH_HALT,
 218         .clkr = {
 219                 .enable_reg = 0x1054,
 220                 .enable_mask = BIT(0),
 221                 .hw.init = &(struct clk_init_data){
 222                         .name = "gpucc_rbcpr_clk",
 223                         .parent_hws = (const struct clk_hw*[]){
 224                                 &rbcpr_clk_src.clkr.hw,
 225                         },
 226                         .num_parents = 1,
 227                         .flags = CLK_SET_RATE_PARENT,
 228                         .ops = &clk_branch2_ops,
 229                 },
 230         },
 231 };
 232
 233 static struct gdsc gpu_cx_gdsc = {
 234         .gdscr = 0x1004,
 235         .gds_hw_ctrl = 0x1008,
 236         .pd = {
 237                 .name = "gpu_cx",
 238         },
 239         .pwrsts = PWRSTS_OFF_ON,
 240         .flags = VOTABLE,
 241 };
 242
 243 static struct gdsc gpu_gx_gdsc = {
 244         .gdscr = 0x1094,
 245         .clamp_io_ctrl = 0x130,
 246         .resets = (unsigned int []){ GPU_GX_BCR },
 247         .reset_count = 1,
 248         .cxcs = (unsigned int []){ 0x1098 },
 249         .cxc_count = 1,
 250         .pd = {
 251                 .name = "gpu_gx",
 252         },
 253         .parent = &gpu_cx_gdsc.pd,
 254         .pwrsts = PWRSTS_OFF | PWRSTS_ON | PWRSTS_RET,
 255         .flags = CLAMP_IO | SW_RESET | AON_RESET | NO_RET_PERIPH,
 256 };
 257
 258 static struct gdsc *gpucc_sdm660_gdscs[] = {
 259         [GPU_CX_GDSC] = &gpu_cx_gdsc,
 260         [GPU_GX_GDSC] = &gpu_gx_gdsc,
 261 };
 262
 263 static const struct qcom_reset_map gpucc_sdm660_resets[] = {
 264         [GPU_CX_BCR] = { 0x1000 },
 265         [RBCPR_BCR] = { 0x1050 },
 266         [GPU_GX_BCR] = { 0x1090 },
 267         [SPDM_BCR] = { 0x10E0 },
 268 };
 269
 270 static struct clk_regmap *gpucc_sdm660_clocks[] = {
 271         [GPUCC_CXO_CLK] = &gpucc_cxo_clk.clkr,
 272         [GPU_PLL0_PLL] = &gpu_pll0_pll_out_main.clkr,
 273         [GPU_PLL1_PLL] = &gpu_pll1_pll_out_main.clkr,
 274         [GFX3D_CLK_SRC] = &gfx3d_clk_src.rcg.clkr,
 275         [RBCPR_CLK_SRC] = &rbcpr_clk_src.clkr,
 276         [RBBMTIMER_CLK_SRC] = &rbbmtimer_clk_src.clkr,
 277         [GPUCC_RBCPR_CLK] = &gpucc_rbcpr_clk.clkr,
 278         [GPUCC_GFX3D_CLK] = &gpucc_gfx3d_clk.clkr,
 279         [GPUCC_RBBMTIMER_CLK] = &gpucc_rbbmtimer_clk.clkr,
 280 };
 281
 282 static const struct regmap_config gpucc_660_regmap_config = {
 283         .reg_bits       = 32,
 284         .reg_stride     = 4,
 285         .val_bits       = 32,
 286         .max_register   = 0x9034,
 287         .fast_io        = true,
 288 };
 289
 290 static const struct qcom_cc_desc gpucc_sdm660_desc = {
 291         .config = &gpucc_660_regmap_config,
 292         .clks = gpucc_sdm660_clocks,
 293         .num_clks = ARRAY_SIZE(gpucc_sdm660_clocks),
 294         .resets = gpucc_sdm660_resets,
 295         .num_resets = ARRAY_SIZE(gpucc_sdm660_resets),
 296         .gdscs = gpucc_sdm660_gdscs,
 297         .num_gdscs = ARRAY_SIZE(gpucc_sdm660_gdscs),
 298 };
 299
 300 static const struct of_device_id gpucc_sdm660_match_table[] = {
 301         { .compatible = "qcom,gpucc-sdm660" },
 302         { .compatible = "qcom,gpucc-sdm630" },
 303         { }
 304 };
 305 MODULE_DEVICE_TABLE(of, gpucc_sdm660_match_table);
 306
 307 static int gpucc_sdm660_probe(struct platform_device *pdev)
 308 {
 309         struct regmap *regmap;
 310         struct alpha_pll_config gpu_pll_config = {
 311                 .config_ctl_val = 0x4001055b,
 312                 .alpha = 0xaaaaab00,
 313                 .alpha_en_mask = BIT(24),
 314                 .vco_val = 0x2 << 20,
 315                 .vco_mask = 0x3 << 20,
 316                 .main_output_mask = 0x1,
 317         };
 318
 319         regmap = qcom_cc_map(pdev, &gpucc_sdm660_desc);
 320         if (IS_ERR(regmap))
 321                 return PTR_ERR(regmap);
 322
 323         /* 800MHz configuration for GPU PLL0 */
 324         gpu_pll_config.l = 0x29;
 325         gpu_pll_config.alpha_hi = 0xaa;
 326         clk_alpha_pll_configure(&gpu_pll0_pll_out_main, regmap, &gpu_pll_config);
 327
 328         /* 740MHz configuration for GPU PLL1 */
 329         gpu_pll_config.l = 0x26;
 330         gpu_pll_config.alpha_hi = 0x8a;
 331         clk_alpha_pll_configure(&gpu_pll1_pll_out_main, regmap, &gpu_pll_config);
 332
 333         return qcom_cc_really_probe(&pdev->dev, &gpucc_sdm660_desc, regmap);
 334 }
 335
 336 static struct platform_driver gpucc_sdm660_driver = {
 337         .probe          = gpucc_sdm660_probe,
 338         .driver         = {
 339                 .name   = "gpucc-sdm660",
 340                 .of_match_table = gpucc_sdm660_match_table,
 341         },
 342 };
 343 module_platform_driver(gpucc_sdm660_driver);
 344
 345 MODULE_DESCRIPTION("Qualcomm SDM630/SDM660 GPUCC Driver");
 346 MODULE_LICENSE("GPL v2");