drivers/clk/qcom/gpucc-sc7180.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2019, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/clk-provider.h>
   7 #include <linux/module.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/regmap.h>
  10
  11 #include <dt-bindings/clock/qcom,gpucc-sc7180.h>
  12
  13 #include "clk-alpha-pll.h"
  14 #include "clk-branch.h"
  15 #include "clk-rcg.h"
  16 #include "clk-regmap.h"
  17 #include "common.h"
  18 #include "gdsc.h"
  19
  20 #define CX_GMU_CBCR_SLEEP_MASK          0xF
  21 #define CX_GMU_CBCR_SLEEP_SHIFT         4
  22 #define CX_GMU_CBCR_WAKE_MASK           0xF
  23 #define CX_GMU_CBCR_WAKE_SHIFT          8
  24 #define CLK_DIS_WAIT_SHIFT              12
  25 #define CLK_DIS_WAIT_MASK               (0xf << CLK_DIS_WAIT_SHIFT)
  26
  27 enum {
  28         P_BI_TCXO,
  29         P_CORE_BI_PLL_TEST_SE,
  30         P_GPLL0_OUT_MAIN,
  31         P_GPLL0_OUT_MAIN_DIV,
  32         P_GPU_CC_PLL1_OUT_EVEN,
  33         P_GPU_CC_PLL1_OUT_MAIN,
  34         P_GPU_CC_PLL1_OUT_ODD,
  35 };
  36
  37 static const struct pll_vco fabia_vco[] = {
  38         { 249600000, 2000000000, 0 },
  39 };
  40
  41 static struct clk_alpha_pll gpu_cc_pll1 = {
  42         .offset = 0x100,
  43         .vco_table = fabia_vco,
  44         .num_vco = ARRAY_SIZE(fabia_vco),
  45         .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA],
  46         .clkr = {
  47                 .hw.init = &(struct clk_init_data){
  48                         .name = "gpu_cc_pll1",
  49                         .parent_data =  &(const struct clk_parent_data){
  50                                 .fw_name = "bi_tcxo",
  51                         },
  52                         .num_parents = 1,
  53                         .ops = &clk_alpha_pll_fabia_ops,
  54                 },
  55         },
  56 };
  57
  58 static const struct parent_map gpu_cc_parent_map_0[] = {
  59         { P_BI_TCXO, 0 },
  60         { P_GPU_CC_PLL1_OUT_MAIN, 3 },
  61         { P_GPLL0_OUT_MAIN, 5 },
  62         { P_GPLL0_OUT_MAIN_DIV, 6 },
  63 };
  64
  65 static const struct clk_parent_data gpu_cc_parent_data_0[] = {
  66         { .fw_name = "bi_tcxo" },
  67         { .hw = &gpu_cc_pll1.clkr.hw },
  68         { .fw_name = "gcc_gpu_gpll0_clk_src" },
  69         { .fw_name = "gcc_gpu_gpll0_div_clk_src" },
  70 };
  71
  72 static const struct freq_tbl ftbl_gpu_cc_gmu_clk_src[] = {
  73         F(19200000, P_BI_TCXO, 1, 0, 0),
  74         F(200000000, P_GPLL0_OUT_MAIN_DIV, 1.5, 0, 0),
  75         { }
  76 };
  77
  78 static struct clk_rcg2 gpu_cc_gmu_clk_src = {
  79         .cmd_rcgr = 0x1120,
  80         .mnd_width = 0,
  81         .hid_width = 5,
  82         .parent_map = gpu_cc_parent_map_0,
  83         .freq_tbl = ftbl_gpu_cc_gmu_clk_src,
  84         .clkr.hw.init = &(struct clk_init_data){
  85                 .name = "gpu_cc_gmu_clk_src",
  86                 .parent_data = gpu_cc_parent_data_0,
  87                 .num_parents = ARRAY_SIZE(gpu_cc_parent_data_0),
  88                 .flags = CLK_SET_RATE_PARENT,
  89                 .ops = &clk_rcg2_shared_ops,
  90         },
  91 };
  92
  93 static struct clk_branch gpu_cc_crc_ahb_clk = {
  94         .halt_reg = 0x107c,
  95         .halt_check = BRANCH_HALT_DELAY,
  96         .clkr = {
  97                 .enable_reg = 0x107c,
  98                 .enable_mask = BIT(0),
  99                 .hw.init = &(struct clk_init_data){
 100                         .name = "gpu_cc_crc_ahb_clk",
 101                         .ops = &clk_branch2_ops,
 102                 },
 103         },
 104 };
 105
 106 static struct clk_branch gpu_cc_cx_gmu_clk = {
 107         .halt_reg = 0x1098,
 108         .halt_check = BRANCH_HALT,
 109         .clkr = {
 110                 .enable_reg = 0x1098,
 111                 .enable_mask = BIT(0),
 112                 .hw.init = &(struct clk_init_data){
 113                         .name = "gpu_cc_cx_gmu_clk",
 114                         .parent_data =  &(const struct clk_parent_data){
 115                                 .hw = &gpu_cc_gmu_clk_src.clkr.hw,
 116                         },
 117                         .num_parents = 1,
 118                         .flags = CLK_SET_RATE_PARENT,
 119                         .ops = &clk_branch2_ops,
 120                 },
 121         },
 122 };
 123
 124 static struct clk_branch gpu_cc_cx_snoc_dvm_clk = {
 125         .halt_reg = 0x108c,
 126         .halt_check = BRANCH_HALT_DELAY,
 127         .clkr = {
 128                 .enable_reg = 0x108c,
 129                 .enable_mask = BIT(0),
 130                 .hw.init = &(struct clk_init_data){
 131                         .name = "gpu_cc_cx_snoc_dvm_clk",
 132                         .ops = &clk_branch2_ops,
 133                 },
 134         },
 135 };
 136
 137 static struct clk_branch gpu_cc_cxo_aon_clk = {
 138         .halt_reg = 0x1004,
 139         .halt_check = BRANCH_HALT_DELAY,
 140         .clkr = {
 141                 .enable_reg = 0x1004,
 142                 .enable_mask = BIT(0),
 143                 .hw.init = &(struct clk_init_data){
 144                         .name = "gpu_cc_cxo_aon_clk",
 145                         .ops = &clk_branch2_ops,
 146                 },
 147         },
 148 };
 149
 150 static struct clk_branch gpu_cc_cxo_clk = {
 151         .halt_reg = 0x109c,
 152         .halt_check = BRANCH_HALT,
 153         .clkr = {
 154                 .enable_reg = 0x109c,
 155                 .enable_mask = BIT(0),
 156                 .hw.init = &(struct clk_init_data){
 157                         .name = "gpu_cc_cxo_clk",
 158                         .ops = &clk_branch2_ops,
 159                 },
 160         },
 161 };
 162
 163 static struct gdsc cx_gdsc = {
 164         .gdscr = 0x106c,
 165         .gds_hw_ctrl = 0x1540,
 166         .pd = {
 167                 .name = "cx_gdsc",
 168         },
 169         .pwrsts = PWRSTS_OFF_ON,
 170         .flags = VOTABLE,
 171 };
 172
 173 static struct gdsc gx_gdsc = {
 174         .gdscr = 0x100c,
 175         .clamp_io_ctrl = 0x1508,
 176         .pd = {
 177                 .name = "gx_gdsc",
 178                 .power_on = gdsc_gx_do_nothing_enable,
 179         },
 180         .pwrsts = PWRSTS_OFF_ON,
 181         .flags = CLAMP_IO,
 182 };
 183
 184 static struct gdsc *gpu_cc_sc7180_gdscs[] = {
 185         [CX_GDSC] = &cx_gdsc,
 186         [GX_GDSC] = &gx_gdsc,
 187 };
 188
 189 static struct clk_regmap *gpu_cc_sc7180_clocks[] = {
 190         [GPU_CC_CXO_CLK] = &gpu_cc_cxo_clk.clkr,
 191         [GPU_CC_CRC_AHB_CLK] = &gpu_cc_crc_ahb_clk.clkr,
 192         [GPU_CC_CX_GMU_CLK] = &gpu_cc_cx_gmu_clk.clkr,
 193         [GPU_CC_CX_SNOC_DVM_CLK] = &gpu_cc_cx_snoc_dvm_clk.clkr,
 194         [GPU_CC_CXO_AON_CLK] = &gpu_cc_cxo_aon_clk.clkr,
 195         [GPU_CC_GMU_CLK_SRC] = &gpu_cc_gmu_clk_src.clkr,
 196         [GPU_CC_PLL1] = &gpu_cc_pll1.clkr,
 197 };
 198
 199 static const struct regmap_config gpu_cc_sc7180_regmap_config = {
 200         .reg_bits =     32,
 201         .reg_stride =   4,
 202         .val_bits =     32,
 203         .max_register = 0x8008,
 204         .fast_io =      true,
 205 };
 206
 207 static const struct qcom_cc_desc gpu_cc_sc7180_desc = {
 208         .config = &gpu_cc_sc7180_regmap_config,
 209         .clks = gpu_cc_sc7180_clocks,
 210         .num_clks = ARRAY_SIZE(gpu_cc_sc7180_clocks),
 211         .gdscs = gpu_cc_sc7180_gdscs,
 212         .num_gdscs = ARRAY_SIZE(gpu_cc_sc7180_gdscs),
 213 };
 214
 215 static const struct of_device_id gpu_cc_sc7180_match_table[] = {
 216         { .compatible = "qcom,sc7180-gpucc" },
 217         { }
 218 };
 219 MODULE_DEVICE_TABLE(of, gpu_cc_sc7180_match_table);
 220
 221 static int gpu_cc_sc7180_probe(struct platform_device *pdev)
 222 {
 223         struct regmap *regmap;
 224         struct alpha_pll_config gpu_cc_pll_config = {};
 225         unsigned int value, mask;
 226
 227         regmap = qcom_cc_map(pdev, &gpu_cc_sc7180_desc);
 228         if (IS_ERR(regmap))
 229                 return PTR_ERR(regmap);
 230
 231         /* 360MHz Configuration */
 232         gpu_cc_pll_config.l = 0x12;
 233         gpu_cc_pll_config.alpha = 0xc000;
 234         gpu_cc_pll_config.config_ctl_val = 0x20485699;
 235         gpu_cc_pll_config.config_ctl_hi_val = 0x00002067;
 236         gpu_cc_pll_config.user_ctl_val = 0x00000001;
 237         gpu_cc_pll_config.user_ctl_hi_val = 0x00004805;
 238         gpu_cc_pll_config.test_ctl_hi_val = 0x40000000;
 239
 240         clk_fabia_pll_configure(&gpu_cc_pll1, regmap, &gpu_cc_pll_config);
 241
 242         /* Recommended WAKEUP/SLEEP settings for the gpu_cc_cx_gmu_clk */
 243         mask = CX_GMU_CBCR_WAKE_MASK << CX_GMU_CBCR_WAKE_SHIFT;
 244         mask |= CX_GMU_CBCR_SLEEP_MASK << CX_GMU_CBCR_SLEEP_SHIFT;
 245         value = 0xF << CX_GMU_CBCR_WAKE_SHIFT | 0xF << CX_GMU_CBCR_SLEEP_SHIFT;
 246         regmap_update_bits(regmap, 0x1098, mask, value);
 247
 248         /* Configure clk_dis_wait for gpu_cx_gdsc */
 249         regmap_update_bits(regmap, 0x106c, CLK_DIS_WAIT_MASK,
 250                                                 8 << CLK_DIS_WAIT_SHIFT);
 251
 252         return qcom_cc_really_probe(pdev, &gpu_cc_sc7180_desc, regmap);
 253 }
 254
 255 static struct platform_driver gpu_cc_sc7180_driver = {
 256         .probe = gpu_cc_sc7180_probe,
 257         .driver = {
 258                 .name = "sc7180-gpucc",
 259                 .of_match_table = gpu_cc_sc7180_match_table,
 260         },
 261 };
 262
 263 static int __init gpu_cc_sc7180_init(void)
 264 {
 265         return platform_driver_register(&gpu_cc_sc7180_driver);
 266 }
 267 subsys_initcall(gpu_cc_sc7180_init);
 268
 269 static void __exit gpu_cc_sc7180_exit(void)
 270 {
 271         platform_driver_unregister(&gpu_cc_sc7180_driver);
 272 }
 273 module_exit(gpu_cc_sc7180_exit);
 274
 275 MODULE_DESCRIPTION("QTI GPU_CC SC7180 Driver");
 276 MODULE_LICENSE("GPL v2");