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/clk-provider.h> 13 #include <linux/regmap.h> 14 #include <linux/reset-controller.h> 15 16 #include <dt-bindings/clock/qcom,gpucc-msm8998.h> 17 18 #include "common.h" 19 #include "clk-regmap.h" 20 #include "clk-regmap-divider.h" 21 #include "clk-alpha-pll.h" 22 #include "clk-rcg.h" 23 #include "clk-branch.h" 24 #include "reset.h" 25 #include "gdsc.h" 26 27 enum { 28 P_XO, 29 P_GPLL0, 30 P_GPUPLL0_OUT_EVEN, 31 }; 32 33 /* Instead of going directly to the block, XO is routed through this branch */ 34 static struct clk_branch gpucc_cxo_clk = { 35 .halt_reg = 0x1020, 36 .clkr = { 37 .enable_reg = 0x1020, 38 .enable_mask = BIT(0), 39 .hw.init = &(struct clk_init_data){ 40 .name = "gpucc_cxo_clk", 41 .parent_data = &(const struct clk_parent_data){ 42 .fw_name = "xo" 43 }, 44 .num_parents = 1, 45 .ops = &clk_branch2_ops, 46 .flags = CLK_IS_CRITICAL, 47 }, 48 }, 49 }; 50 51 static const struct pll_vco fabia_vco[] = { 52 { 249600000, 2000000000, 0 }, 53 { 125000000, 1000000000, 1 }, 54 }; 55 56 static const struct clk_div_table post_div_table_fabia_even[] = { 57 { 0x0, 1 }, 58 { 0x1, 2 }, 59 { 0x3, 4 }, 60 { 0x7, 8 }, 61 { } 62 }; 63 64 static struct clk_alpha_pll gpupll0 = { 65 .offset = 0x0, 66 .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA], 67 .vco_table = fabia_vco, 68 .num_vco = ARRAY_SIZE(fabia_vco), 69 .clkr.hw.init = &(struct clk_init_data){ 70 .name = "gpupll0", 71 .parent_hws = (const struct clk_hw *[]){ &gpucc_cxo_clk.clkr.hw }, 72 .num_parents = 1, 73 .ops = &clk_alpha_pll_fabia_ops, 74 }, 75 }; 76 77 static struct clk_alpha_pll_postdiv gpupll0_out_even = { 78 .offset = 0x0, 79 .post_div_shift = 8, 80 .post_div_table = post_div_table_fabia_even, 81 .num_post_div = ARRAY_SIZE(post_div_table_fabia_even), 82 .width = 4, 83 .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA], 84 .clkr.hw.init = &(struct clk_init_data){ 85 .name = "gpupll0_out_even", 86 .parent_hws = (const struct clk_hw *[]){ &gpupll0.clkr.hw }, 87 .num_parents = 1, 88 .flags = CLK_SET_RATE_PARENT, 89 .ops = &clk_alpha_pll_postdiv_fabia_ops, 90 }, 91 }; 92 93 static const struct parent_map gpu_xo_gpll0_map[] = { 94 { P_XO, 0 }, 95 { P_GPLL0, 5 }, 96 }; 97 98 static const struct clk_parent_data gpu_xo_gpll0[] = { 99 { .hw = &gpucc_cxo_clk.clkr.hw }, 100 { .fw_name = "gpll0", .name = "gcc_gpu_gpll0_clk" }, 101 }; 102 103 static const struct parent_map gpu_xo_gpupll0_map[] = { 104 { P_XO, 0 }, 105 { P_GPUPLL0_OUT_EVEN, 1 }, 106 }; 107 108 static const struct clk_hw *gpu_xo_gpupll0[] = { 109 &gpucc_cxo_clk.clkr.hw, 110 &gpupll0_out_even.clkr.hw, 111 }; 112 113 static const struct freq_tbl ftbl_rbcpr_clk_src[] = { 114 F(19200000, P_XO, 1, 0, 0), 115 F(50000000, P_GPLL0, 12, 0, 0), 116 { } 117 }; 118 119 static struct clk_rcg2 rbcpr_clk_src = { 120 .cmd_rcgr = 0x1030, 121 .hid_width = 5, 122 .parent_map = gpu_xo_gpll0_map, 123 .freq_tbl = ftbl_rbcpr_clk_src, 124 .clkr.hw.init = &(struct clk_init_data){ 125 .name = "rbcpr_clk_src", 126 .parent_data = gpu_xo_gpll0, 127 .num_parents = ARRAY_SIZE(gpu_xo_gpll0), 128 .ops = &clk_rcg2_ops, 129 }, 130 }; 131 132 static const struct freq_tbl ftbl_gfx3d_clk_src[] = { 133 { .src = P_GPUPLL0_OUT_EVEN, .pre_div = 3 }, 134 { } 135 }; 136 137 static struct clk_rcg2 gfx3d_clk_src = { 138 .cmd_rcgr = 0x1070, 139 .hid_width = 5, 140 .parent_map = gpu_xo_gpupll0_map, 141 .freq_tbl = ftbl_gfx3d_clk_src, 142 .clkr.hw.init = &(struct clk_init_data){ 143 .name = "gfx3d_clk_src", 144 .parent_hws = gpu_xo_gpupll0, 145 .num_parents = ARRAY_SIZE(gpu_xo_gpupll0), 146 .ops = &clk_rcg2_ops, 147 .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, 148 }, 149 }; 150 151 static const struct freq_tbl ftbl_rbbmtimer_clk_src[] = { 152 F(19200000, P_XO, 1, 0, 0), 153 { } 154 }; 155 156 static struct clk_rcg2 rbbmtimer_clk_src = { 157 .cmd_rcgr = 0x10b0, 158 .hid_width = 5, 159 .parent_map = gpu_xo_gpll0_map, 160 .freq_tbl = ftbl_rbbmtimer_clk_src, 161 .clkr.hw.init = &(struct clk_init_data){ 162 .name = "rbbmtimer_clk_src", 163 .parent_data = gpu_xo_gpll0, 164 .num_parents = ARRAY_SIZE(gpu_xo_gpll0), 165 .ops = &clk_rcg2_ops, 166 }, 167 }; 168 169 static const struct freq_tbl ftbl_gfx3d_isense_clk_src[] = { 170 F(19200000, P_XO, 1, 0, 0), 171 F(40000000, P_GPLL0, 15, 0, 0), 172 F(200000000, P_GPLL0, 3, 0, 0), 173 F(300000000, P_GPLL0, 2, 0, 0), 174 { } 175 }; 176 177 static struct clk_rcg2 gfx3d_isense_clk_src = { 178 .cmd_rcgr = 0x1100, 179 .hid_width = 5, 180 .parent_map = gpu_xo_gpll0_map, 181 .freq_tbl = ftbl_gfx3d_isense_clk_src, 182 .clkr.hw.init = &(struct clk_init_data){ 183 .name = "gfx3d_isense_clk_src", 184 .parent_data = gpu_xo_gpll0, 185 .num_parents = ARRAY_SIZE(gpu_xo_gpll0), 186 .ops = &clk_rcg2_ops, 187 }, 188 }; 189 190 static struct clk_branch rbcpr_clk = { 191 .halt_reg = 0x1054, 192 .clkr = { 193 .enable_reg = 0x1054, 194 .enable_mask = BIT(0), 195 .hw.init = &(struct clk_init_data){ 196 .name = "rbcpr_clk", 197 .parent_hws = (const struct clk_hw *[]){ &rbcpr_clk_src.clkr.hw }, 198 .num_parents = 1, 199 .ops = &clk_branch2_ops, 200 .flags = CLK_SET_RATE_PARENT, 201 }, 202 }, 203 }; 204 205 static struct clk_branch gfx3d_clk = { 206 .halt_reg = 0x1098, 207 .clkr = { 208 .enable_reg = 0x1098, 209 .enable_mask = BIT(0), 210 .hw.init = &(struct clk_init_data){ 211 .name = "gfx3d_clk", 212 .parent_hws = (const struct clk_hw *[]){ &gfx3d_clk_src.clkr.hw }, 213 .num_parents = 1, 214 .ops = &clk_branch2_ops, 215 .flags = CLK_SET_RATE_PARENT, 216 }, 217 }, 218 }; 219 220 static struct clk_branch rbbmtimer_clk = { 221 .halt_reg = 0x10d0, 222 .clkr = { 223 .enable_reg = 0x10d0, 224 .enable_mask = BIT(0), 225 .hw.init = &(struct clk_init_data){ 226 .name = "rbbmtimer_clk", 227 .parent_hws = (const struct clk_hw *[]){ &rbbmtimer_clk_src.clkr.hw }, 228 .num_parents = 1, 229 .ops = &clk_branch2_ops, 230 .flags = CLK_SET_RATE_PARENT, 231 }, 232 }, 233 }; 234 235 static struct clk_branch gfx3d_isense_clk = { 236 .halt_reg = 0x1124, 237 .clkr = { 238 .enable_reg = 0x1124, 239 .enable_mask = BIT(0), 240 .hw.init = &(struct clk_init_data){ 241 .name = "gfx3d_isense_clk", 242 .parent_hws = (const struct clk_hw *[]){ &gfx3d_isense_clk_src.clkr.hw }, 243 .num_parents = 1, 244 .ops = &clk_branch2_ops, 245 }, 246 }, 247 }; 248 249 static struct gdsc gpu_cx_gdsc = { 250 .gdscr = 0x1004, 251 .gds_hw_ctrl = 0x1008, 252 .pd = { 253 .name = "gpu_cx", 254 }, 255 .pwrsts = PWRSTS_OFF_ON, 256 .flags = VOTABLE, 257 }; 258 259 static struct gdsc gpu_gx_gdsc = { 260 .gdscr = 0x1094, 261 .clamp_io_ctrl = 0x130, 262 .resets = (unsigned int []){ GPU_GX_BCR }, 263 .reset_count = 1, 264 .cxcs = (unsigned int []){ 0x1098 }, 265 .cxc_count = 1, 266 .pd = { 267 .name = "gpu_gx", 268 }, 269 .parent = &gpu_cx_gdsc.pd, 270 .pwrsts = PWRSTS_OFF_ON | PWRSTS_RET, 271 .flags = CLAMP_IO | SW_RESET | AON_RESET | NO_RET_PERIPH, 272 }; 273 274 static struct clk_regmap *gpucc_msm8998_clocks[] = { 275 [GPUPLL0] = &gpupll0.clkr, 276 [GPUPLL0_OUT_EVEN] = &gpupll0_out_even.clkr, 277 [RBCPR_CLK_SRC] = &rbcpr_clk_src.clkr, 278 [GFX3D_CLK_SRC] = &gfx3d_clk_src.clkr, 279 [RBBMTIMER_CLK_SRC] = &rbbmtimer_clk_src.clkr, 280 [GFX3D_ISENSE_CLK_SRC] = &gfx3d_isense_clk_src.clkr, 281 [RBCPR_CLK] = &rbcpr_clk.clkr, 282 [GFX3D_CLK] = &gfx3d_clk.clkr, 283 [RBBMTIMER_CLK] = &rbbmtimer_clk.clkr, 284 [GFX3D_ISENSE_CLK] = &gfx3d_isense_clk.clkr, 285 [GPUCC_CXO_CLK] = &gpucc_cxo_clk.clkr, 286 }; 287 288 static struct gdsc *gpucc_msm8998_gdscs[] = { 289 [GPU_CX_GDSC] = &gpu_cx_gdsc, 290 [GPU_GX_GDSC] = &gpu_gx_gdsc, 291 }; 292 293 static const struct qcom_reset_map gpucc_msm8998_resets[] = { 294 [GPU_CX_BCR] = { 0x1000 }, 295 [RBCPR_BCR] = { 0x1050 }, 296 [GPU_GX_BCR] = { 0x1090 }, 297 [GPU_ISENSE_BCR] = { 0x1120 }, 298 }; 299 300 static const struct regmap_config gpucc_msm8998_regmap_config = { 301 .reg_bits = 32, 302 .reg_stride = 4, 303 .val_bits = 32, 304 .max_register = 0x9000, 305 .fast_io = true, 306 }; 307 308 static const struct qcom_cc_desc gpucc_msm8998_desc = { 309 .config = &gpucc_msm8998_regmap_config, 310 .clks = gpucc_msm8998_clocks, 311 .num_clks = ARRAY_SIZE(gpucc_msm8998_clocks), 312 .resets = gpucc_msm8998_resets, 313 .num_resets = ARRAY_SIZE(gpucc_msm8998_resets), 314 .gdscs = gpucc_msm8998_gdscs, 315 .num_gdscs = ARRAY_SIZE(gpucc_msm8998_gdscs), 316 }; 317 318 static const struct of_device_id gpucc_msm8998_match_table[] = { 319 { .compatible = "qcom,msm8998-gpucc" }, 320 { } 321 }; 322 MODULE_DEVICE_TABLE(of, gpucc_msm8998_match_table); 323 324 static int gpucc_msm8998_probe(struct platform_device *pdev) 325 { 326 struct regmap *regmap; 327 328 regmap = qcom_cc_map(pdev, &gpucc_msm8998_desc); 329 if (IS_ERR(regmap)) 330 return PTR_ERR(regmap); 331 332 /* force periph logic on to avoid perf counter corruption */ 333 regmap_write_bits(regmap, gfx3d_clk.clkr.enable_reg, BIT(13), BIT(13)); 334 /* tweak droop detector (GPUCC_GPU_DD_WRAP_CTRL) to reduce leakage */ 335 regmap_write_bits(regmap, gfx3d_clk.clkr.enable_reg, BIT(0), BIT(0)); 336 337 return qcom_cc_really_probe(&pdev->dev, &gpucc_msm8998_desc, regmap); 338 } 339 340 static struct platform_driver gpucc_msm8998_driver = { 341 .probe = gpucc_msm8998_probe, 342 .driver = { 343 .name = "gpucc-msm8998", 344 .of_match_table = gpucc_msm8998_match_table, 345 }, 346 }; 347 module_platform_driver(gpucc_msm8998_driver); 348 349 MODULE_DESCRIPTION("QCOM GPUCC MSM8998 Driver"); 350 MODULE_LICENSE("GPL v2"); 351