1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2019, Jeffrey Hugo 4 */ 5 6 #include <linux/kernel.h> 7 #include <linux/bitops.h> 8 #include <linux/err.h> 9 #include <linux/platform_device.h> 10 #include <linux/module.h> 11 #include <linux/of.h> 12 #include <linux/of_device.h> 13 #include <linux/clk-provider.h> 14 #include <linux/regmap.h> 15 #include <linux/reset-controller.h> 16 17 #include <dt-bindings/clock/qcom,gpucc-msm8998.h> 18 19 #include "common.h" 20 #include "clk-regmap.h" 21 #include "clk-regmap-divider.h" 22 #include "clk-alpha-pll.h" 23 #include "clk-rcg.h" 24 #include "clk-branch.h" 25 #include "reset.h" 26 #include "gdsc.h" 27 28 enum { 29 P_XO, 30 P_GPLL0, 31 P_GPUPLL0_OUT_EVEN, 32 }; 33 34 /* Instead of going directly to the block, XO is routed through this branch */ 35 static struct clk_branch gpucc_cxo_clk = { 36 .halt_reg = 0x1020, 37 .clkr = { 38 .enable_reg = 0x1020, 39 .enable_mask = BIT(0), 40 .hw.init = &(struct clk_init_data){ 41 .name = "gpucc_cxo_clk", 42 .parent_data = &(const struct clk_parent_data){ 43 .fw_name = "xo", 44 .name = "xo" 45 }, 46 .num_parents = 1, 47 .ops = &clk_branch2_ops, 48 .flags = CLK_IS_CRITICAL, 49 }, 50 }, 51 }; 52 53 static const struct clk_div_table post_div_table_fabia_even[] = { 54 { 0x0, 1 }, 55 { 0x1, 2 }, 56 { 0x3, 4 }, 57 { 0x7, 8 }, 58 { } 59 }; 60 61 static struct clk_alpha_pll gpupll0 = { 62 .offset = 0x0, 63 .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA], 64 .clkr.hw.init = &(struct clk_init_data){ 65 .name = "gpupll0", 66 .parent_hws = (const struct clk_hw *[]){ &gpucc_cxo_clk.clkr.hw }, 67 .num_parents = 1, 68 .ops = &clk_alpha_pll_fixed_fabia_ops, 69 }, 70 }; 71 72 static struct clk_alpha_pll_postdiv gpupll0_out_even = { 73 .offset = 0x0, 74 .post_div_shift = 8, 75 .post_div_table = post_div_table_fabia_even, 76 .num_post_div = ARRAY_SIZE(post_div_table_fabia_even), 77 .width = 4, 78 .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA], 79 .clkr.hw.init = &(struct clk_init_data){ 80 .name = "gpupll0_out_even", 81 .parent_hws = (const struct clk_hw *[]){ &gpupll0.clkr.hw }, 82 .num_parents = 1, 83 .ops = &clk_alpha_pll_postdiv_fabia_ops, 84 }, 85 }; 86 87 static const struct parent_map gpu_xo_gpll0_map[] = { 88 { P_XO, 0 }, 89 { P_GPLL0, 5 }, 90 }; 91 92 static const struct clk_parent_data gpu_xo_gpll0[] = { 93 { .hw = &gpucc_cxo_clk.clkr.hw }, 94 { .fw_name = "gpll0", .name = "gpll0" }, 95 }; 96 97 static const struct parent_map gpu_xo_gpupll0_map[] = { 98 { P_XO, 0 }, 99 { P_GPUPLL0_OUT_EVEN, 1 }, 100 }; 101 102 static const struct clk_parent_data gpu_xo_gpupll0[] = { 103 { .hw = &gpucc_cxo_clk.clkr.hw }, 104 { .hw = &gpupll0_out_even.clkr.hw }, 105 }; 106 107 static const struct freq_tbl ftbl_rbcpr_clk_src[] = { 108 F(19200000, P_XO, 1, 0, 0), 109 F(50000000, P_GPLL0, 12, 0, 0), 110 { } 111 }; 112 113 static struct clk_rcg2 rbcpr_clk_src = { 114 .cmd_rcgr = 0x1030, 115 .hid_width = 5, 116 .parent_map = gpu_xo_gpll0_map, 117 .freq_tbl = ftbl_rbcpr_clk_src, 118 .clkr.hw.init = &(struct clk_init_data){ 119 .name = "rbcpr_clk_src", 120 .parent_data = gpu_xo_gpll0, 121 .num_parents = 2, 122 .ops = &clk_rcg2_ops, 123 }, 124 }; 125 126 static const struct freq_tbl ftbl_gfx3d_clk_src[] = { 127 { .src = P_GPUPLL0_OUT_EVEN, .pre_div = 3 }, 128 { } 129 }; 130 131 static struct clk_rcg2 gfx3d_clk_src = { 132 .cmd_rcgr = 0x1070, 133 .hid_width = 5, 134 .parent_map = gpu_xo_gpupll0_map, 135 .freq_tbl = ftbl_gfx3d_clk_src, 136 .clkr.hw.init = &(struct clk_init_data){ 137 .name = "gfx3d_clk_src", 138 .parent_data = gpu_xo_gpupll0, 139 .num_parents = 2, 140 .ops = &clk_rcg2_ops, 141 .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, 142 }, 143 }; 144 145 static const struct freq_tbl ftbl_rbbmtimer_clk_src[] = { 146 F(19200000, P_XO, 1, 0, 0), 147 { } 148 }; 149 150 static struct clk_rcg2 rbbmtimer_clk_src = { 151 .cmd_rcgr = 0x10b0, 152 .hid_width = 5, 153 .parent_map = gpu_xo_gpll0_map, 154 .freq_tbl = ftbl_rbbmtimer_clk_src, 155 .clkr.hw.init = &(struct clk_init_data){ 156 .name = "rbbmtimer_clk_src", 157 .parent_data = gpu_xo_gpll0, 158 .num_parents = 2, 159 .ops = &clk_rcg2_ops, 160 }, 161 }; 162 163 static const struct freq_tbl ftbl_gfx3d_isense_clk_src[] = { 164 F(19200000, P_XO, 1, 0, 0), 165 F(40000000, P_GPLL0, 15, 0, 0), 166 F(200000000, P_GPLL0, 3, 0, 0), 167 F(300000000, P_GPLL0, 2, 0, 0), 168 { } 169 }; 170 171 static struct clk_rcg2 gfx3d_isense_clk_src = { 172 .cmd_rcgr = 0x1100, 173 .hid_width = 5, 174 .parent_map = gpu_xo_gpll0_map, 175 .freq_tbl = ftbl_gfx3d_isense_clk_src, 176 .clkr.hw.init = &(struct clk_init_data){ 177 .name = "gfx3d_isense_clk_src", 178 .parent_data = gpu_xo_gpll0, 179 .num_parents = 2, 180 .ops = &clk_rcg2_ops, 181 }, 182 }; 183 184 static struct clk_branch rbcpr_clk = { 185 .halt_reg = 0x1054, 186 .clkr = { 187 .enable_reg = 0x1054, 188 .enable_mask = BIT(0), 189 .hw.init = &(struct clk_init_data){ 190 .name = "rbcpr_clk", 191 .parent_hws = (const struct clk_hw *[]){ &rbcpr_clk_src.clkr.hw }, 192 .num_parents = 1, 193 .ops = &clk_branch2_ops, 194 .flags = CLK_SET_RATE_PARENT, 195 }, 196 }, 197 }; 198 199 static struct clk_branch gfx3d_clk = { 200 .halt_reg = 0x1098, 201 .clkr = { 202 .enable_reg = 0x1098, 203 .enable_mask = BIT(0), 204 .hw.init = &(struct clk_init_data){ 205 .name = "gfx3d_clk", 206 .parent_hws = (const struct clk_hw *[]){ &gfx3d_clk_src.clkr.hw }, 207 .num_parents = 1, 208 .ops = &clk_branch2_ops, 209 .flags = CLK_SET_RATE_PARENT, 210 }, 211 }, 212 }; 213 214 static struct clk_branch rbbmtimer_clk = { 215 .halt_reg = 0x10d0, 216 .clkr = { 217 .enable_reg = 0x10d0, 218 .enable_mask = BIT(0), 219 .hw.init = &(struct clk_init_data){ 220 .name = "rbbmtimer_clk", 221 .parent_hws = (const struct clk_hw *[]){ &rbbmtimer_clk_src.clkr.hw }, 222 .num_parents = 1, 223 .ops = &clk_branch2_ops, 224 .flags = CLK_SET_RATE_PARENT, 225 }, 226 }, 227 }; 228 229 static struct clk_branch gfx3d_isense_clk = { 230 .halt_reg = 0x1124, 231 .clkr = { 232 .enable_reg = 0x1124, 233 .enable_mask = BIT(0), 234 .hw.init = &(struct clk_init_data){ 235 .name = "gfx3d_isense_clk", 236 .parent_hws = (const struct clk_hw *[]){ &gfx3d_isense_clk_src.clkr.hw }, 237 .num_parents = 1, 238 .ops = &clk_branch2_ops, 239 }, 240 }, 241 }; 242 243 static struct gdsc gpu_cx_gdsc = { 244 .gdscr = 0x1004, 245 .gds_hw_ctrl = 0x1008, 246 .pd = { 247 .name = "gpu_cx", 248 }, 249 .pwrsts = PWRSTS_OFF_ON, 250 .flags = VOTABLE, 251 }; 252 253 static struct gdsc gpu_gx_gdsc = { 254 .gdscr = 0x1094, 255 .clamp_io_ctrl = 0x130, 256 .pd = { 257 .name = "gpu_gx", 258 }, 259 .parent = &gpu_cx_gdsc.pd, 260 .pwrsts = PWRSTS_OFF_ON, 261 .flags = CLAMP_IO | AON_RESET, 262 }; 263 264 static struct clk_regmap *gpucc_msm8998_clocks[] = { 265 [GPUPLL0] = &gpupll0.clkr, 266 [GPUPLL0_OUT_EVEN] = &gpupll0_out_even.clkr, 267 [RBCPR_CLK_SRC] = &rbcpr_clk_src.clkr, 268 [GFX3D_CLK_SRC] = &gfx3d_clk_src.clkr, 269 [RBBMTIMER_CLK_SRC] = &rbbmtimer_clk_src.clkr, 270 [GFX3D_ISENSE_CLK_SRC] = &gfx3d_isense_clk_src.clkr, 271 [RBCPR_CLK] = &rbcpr_clk.clkr, 272 [GFX3D_CLK] = &gfx3d_clk.clkr, 273 [RBBMTIMER_CLK] = &rbbmtimer_clk.clkr, 274 [GFX3D_ISENSE_CLK] = &gfx3d_isense_clk.clkr, 275 [GPUCC_CXO_CLK] = &gpucc_cxo_clk.clkr, 276 }; 277 278 static struct gdsc *gpucc_msm8998_gdscs[] = { 279 [GPU_CX_GDSC] = &gpu_cx_gdsc, 280 [GPU_GX_GDSC] = &gpu_gx_gdsc, 281 }; 282 283 static const struct qcom_reset_map gpucc_msm8998_resets[] = { 284 [GPU_CX_BCR] = { 0x1000 }, 285 [RBCPR_BCR] = { 0x1050 }, 286 [GPU_GX_BCR] = { 0x1090 }, 287 [GPU_ISENSE_BCR] = { 0x1120 }, 288 }; 289 290 static const struct regmap_config gpucc_msm8998_regmap_config = { 291 .reg_bits = 32, 292 .reg_stride = 4, 293 .val_bits = 32, 294 .max_register = 0x9000, 295 .fast_io = true, 296 }; 297 298 static const struct qcom_cc_desc gpucc_msm8998_desc = { 299 .config = &gpucc_msm8998_regmap_config, 300 .clks = gpucc_msm8998_clocks, 301 .num_clks = ARRAY_SIZE(gpucc_msm8998_clocks), 302 .resets = gpucc_msm8998_resets, 303 .num_resets = ARRAY_SIZE(gpucc_msm8998_resets), 304 .gdscs = gpucc_msm8998_gdscs, 305 .num_gdscs = ARRAY_SIZE(gpucc_msm8998_gdscs), 306 }; 307 308 static const struct of_device_id gpucc_msm8998_match_table[] = { 309 { .compatible = "qcom,msm8998-gpucc" }, 310 { } 311 }; 312 MODULE_DEVICE_TABLE(of, gpucc_msm8998_match_table); 313 314 static int gpucc_msm8998_probe(struct platform_device *pdev) 315 { 316 struct regmap *regmap; 317 318 regmap = qcom_cc_map(pdev, &gpucc_msm8998_desc); 319 if (IS_ERR(regmap)) 320 return PTR_ERR(regmap); 321 322 /* force periph logic on to avoid perf counter corruption */ 323 regmap_write_bits(regmap, gfx3d_clk.clkr.enable_reg, BIT(13), BIT(13)); 324 /* tweak droop detector (GPUCC_GPU_DD_WRAP_CTRL) to reduce leakage */ 325 regmap_write_bits(regmap, gfx3d_clk.clkr.enable_reg, BIT(0), BIT(0)); 326 327 return qcom_cc_really_probe(pdev, &gpucc_msm8998_desc, regmap); 328 } 329 330 static struct platform_driver gpucc_msm8998_driver = { 331 .probe = gpucc_msm8998_probe, 332 .driver = { 333 .name = "gpucc-msm8998", 334 .of_match_table = gpucc_msm8998_match_table, 335 }, 336 }; 337 module_platform_driver(gpucc_msm8998_driver); 338 339 MODULE_DESCRIPTION("QCOM GPUCC MSM8998 Driver"); 340 MODULE_LICENSE("GPL v2"); 341