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/of_device.h>
17 #include <linux/regmap.h>
18 #include <linux/reset-controller.h>
19 #include <dt-bindings/clock/qcom,gpucc-sdm660.h>
20
21 #include "clk-alpha-pll.h"
22 #include "common.h"
23 #include "clk-regmap.h"
24 #include "clk-pll.h"
25 #include "clk-rcg.h"
26 #include "clk-branch.h"
27 #include "gdsc.h"
28 #include "reset.h"
29
30 enum {
31 P_GPU_XO,
32 P_CORE_BI_PLL_TEST_SE,
33 P_GPLL0_OUT_MAIN,
34 P_GPLL0_OUT_MAIN_DIV,
35 P_GPU_PLL0_PLL_OUT_MAIN,
36 P_GPU_PLL1_PLL_OUT_MAIN,
37 };
38
39 static struct clk_branch gpucc_cxo_clk = {
40 .halt_reg = 0x1020,
41 .clkr = {
42 .enable_reg = 0x1020,
43 .enable_mask = BIT(0),
44 .hw.init = &(struct clk_init_data){
45 .name = "gpucc_cxo_clk",
46 .parent_data = &(const struct clk_parent_data){
47 .fw_name = "xo"
48 },
49 .num_parents = 1,
50 .ops = &clk_branch2_ops,
51 .flags = CLK_IS_CRITICAL,
52 },
53 },
54 };
55
56 static struct pll_vco gpu_vco[] = {
57 { 1000000000, 2000000000, 0 },
58 { 500000000, 1000000000, 2 },
59 { 250000000, 500000000, 3 },
60 };
61
62 static struct clk_alpha_pll gpu_pll0_pll_out_main = {
63 .offset = 0x0,
64 .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
65 .vco_table = gpu_vco,
66 .num_vco = ARRAY_SIZE(gpu_vco),
67 .clkr.hw.init = &(struct clk_init_data){
68 .name = "gpu_pll0_pll_out_main",
69 .parent_data = &(const struct clk_parent_data){
70 .hw = &gpucc_cxo_clk.clkr.hw,
71 },
72 .num_parents = 1,
73 .ops = &clk_alpha_pll_ops,
74 },
75 };
76
77 static struct clk_alpha_pll gpu_pll1_pll_out_main = {
78 .offset = 0x40,
79 .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
80 .vco_table = gpu_vco,
81 .num_vco = ARRAY_SIZE(gpu_vco),
82 .clkr.hw.init = &(struct clk_init_data){
83 .name = "gpu_pll1_pll_out_main",
84 .parent_data = &(const struct clk_parent_data){
85 .hw = &gpucc_cxo_clk.clkr.hw,
86 },
87 .num_parents = 1,
88 .ops = &clk_alpha_pll_ops,
89 },
90 };
91
92 static const struct parent_map gpucc_parent_map_1[] = {
93 { P_GPU_XO, 0 },
94 { P_GPU_PLL0_PLL_OUT_MAIN, 1 },
95 { P_GPU_PLL1_PLL_OUT_MAIN, 3 },
96 { P_GPLL0_OUT_MAIN, 5 },
97 };
98
99 static const struct clk_parent_data gpucc_parent_data_1[] = {
100 { .hw = &gpucc_cxo_clk.clkr.hw },
101 { .hw = &gpu_pll0_pll_out_main.clkr.hw },
102 { .hw = &gpu_pll1_pll_out_main.clkr.hw },
103 { .fw_name = "gcc_gpu_gpll0_clk" },
104 };
105
106 static struct clk_rcg2_gfx3d gfx3d_clk_src = {
107 .div = 2,
108 .rcg = {
109 .cmd_rcgr = 0x1070,
110 .mnd_width = 0,
111 .hid_width = 5,
112 .parent_map = gpucc_parent_map_1,
113 .clkr.hw.init = &(struct clk_init_data){
114 .name = "gfx3d_clk_src",
115 .parent_data = gpucc_parent_data_1,
116 .num_parents = ARRAY_SIZE(gpucc_parent_data_1),
117 .ops = &clk_gfx3d_ops,
118 .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
119 },
120 },
121 .hws = (struct clk_hw*[]){
122 &gpucc_cxo_clk.clkr.hw,
123 &gpu_pll0_pll_out_main.clkr.hw,
124 &gpu_pll1_pll_out_main.clkr.hw,
125 }
126 };
127
128 static struct clk_branch gpucc_gfx3d_clk = {
129 .halt_reg = 0x1098,
130 .halt_check = BRANCH_HALT,
131 .hwcg_reg = 0x1098,
132 .hwcg_bit = 1,
133 .clkr = {
134 .enable_reg = 0x1098,
135 .enable_mask = BIT(0),
136 .hw.init = &(struct clk_init_data){
137 .name = "gpucc_gfx3d_clk",
138 .parent_data = &(const struct clk_parent_data){
139 .hw = &gfx3d_clk_src.rcg.clkr.hw,
140 },
141 .num_parents = 1,
142 .ops = &clk_branch2_ops,
143 .flags = CLK_SET_RATE_PARENT,
144 },
145 },
146 };
147
148 static const struct parent_map gpucc_parent_map_0[] = {
149 { P_GPU_XO, 0 },
150 { P_GPLL0_OUT_MAIN, 5 },
151 { P_GPLL0_OUT_MAIN_DIV, 6 },
152 };
153
154 static const struct clk_parent_data gpucc_parent_data_0[] = {
155 { .hw = &gpucc_cxo_clk.clkr.hw },
156 { .fw_name = "gcc_gpu_gpll0_clk" },
157 { .fw_name = "gcc_gpu_gpll0_div_clk" },
158 };
159
160 static const struct freq_tbl ftbl_rbbmtimer_clk_src[] = {
161 F(19200000, P_GPU_XO, 1, 0, 0),
162 { }
163 };
164
165 static struct clk_rcg2 rbbmtimer_clk_src = {
166 .cmd_rcgr = 0x10b0,
167 .mnd_width = 0,
168 .hid_width = 5,
169 .parent_map = gpucc_parent_map_0,
170 .freq_tbl = ftbl_rbbmtimer_clk_src,
171 .clkr.hw.init = &(struct clk_init_data){
172 .name = "rbbmtimer_clk_src",
173 .parent_data = gpucc_parent_data_0,
174 .num_parents = ARRAY_SIZE(gpucc_parent_data_0),
175 .ops = &clk_rcg2_ops,
176 },
177 };
178
179 static const struct freq_tbl ftbl_rbcpr_clk_src[] = {
180 F(19200000, P_GPU_XO, 1, 0, 0),
181 F(50000000, P_GPLL0_OUT_MAIN_DIV, 6, 0, 0),
182 { }
183 };
184
185 static struct clk_rcg2 rbcpr_clk_src = {
186 .cmd_rcgr = 0x1030,
187 .mnd_width = 0,
188 .hid_width = 5,
189 .parent_map = gpucc_parent_map_0,
190 .freq_tbl = ftbl_rbcpr_clk_src,
191 .clkr.hw.init = &(struct clk_init_data){
192 .name = "rbcpr_clk_src",
193 .parent_data = gpucc_parent_data_0,
194 .num_parents = ARRAY_SIZE(gpucc_parent_data_0),
195 .ops = &clk_rcg2_ops,
196 },
197 };
198
199 static struct clk_branch gpucc_rbbmtimer_clk = {
200 .halt_reg = 0x10d0,
201 .halt_check = BRANCH_HALT,
202 .clkr = {
203 .enable_reg = 0x10d0,
204 .enable_mask = BIT(0),
205 .hw.init = &(struct clk_init_data){
206 .name = "gpucc_rbbmtimer_clk",
207 .parent_names = (const char *[]){
208 "rbbmtimer_clk_src",
209 },
210 .num_parents = 1,
211 .flags = CLK_SET_RATE_PARENT,
212 .ops = &clk_branch2_ops,
213 },
214 },
215 };
216
217 static struct clk_branch gpucc_rbcpr_clk = {
218 .halt_reg = 0x1054,
219 .halt_check = BRANCH_HALT,
220 .clkr = {
221 .enable_reg = 0x1054,
222 .enable_mask = BIT(0),
223 .hw.init = &(struct clk_init_data){
224 .name = "gpucc_rbcpr_clk",
225 .parent_names = (const char *[]){
226 "rbcpr_clk_src",
227 },
228 .num_parents = 1,
229 .flags = CLK_SET_RATE_PARENT,
230 .ops = &clk_branch2_ops,
231 },
232 },
233 };
234
235 static struct gdsc gpu_cx_gdsc = {
236 .gdscr = 0x1004,
237 .gds_hw_ctrl = 0x1008,
238 .pd = {
239 .name = "gpu_cx",
240 },
241 .pwrsts = PWRSTS_OFF_ON,
242 .flags = VOTABLE,
243 };
244
245 static struct gdsc gpu_gx_gdsc = {
246 .gdscr = 0x1094,
247 .clamp_io_ctrl = 0x130,
248 .resets = (unsigned int []){ GPU_GX_BCR },
249 .reset_count = 1,
250 .cxcs = (unsigned int []){ 0x1098 },
251 .cxc_count = 1,
252 .pd = {
253 .name = "gpu_gx",
254 },
255 .parent = &gpu_cx_gdsc.pd,
256 .pwrsts = PWRSTS_OFF | PWRSTS_ON | PWRSTS_RET,
257 .flags = CLAMP_IO | SW_RESET | AON_RESET | NO_RET_PERIPH,
258 };
259
260 static struct gdsc *gpucc_sdm660_gdscs[] = {
261 [GPU_CX_GDSC] = &gpu_cx_gdsc,
262 [GPU_GX_GDSC] = &gpu_gx_gdsc,
263 };
264
265 static const struct qcom_reset_map gpucc_sdm660_resets[] = {
266 [GPU_CX_BCR] = { 0x1000 },
267 [RBCPR_BCR] = { 0x1050 },
268 [GPU_GX_BCR] = { 0x1090 },
269 [SPDM_BCR] = { 0x10E0 },
270 };
271
272 static struct clk_regmap *gpucc_sdm660_clocks[] = {
273 [GPUCC_CXO_CLK] = &gpucc_cxo_clk.clkr,
274 [GPU_PLL0_PLL] = &gpu_pll0_pll_out_main.clkr,
275 [GPU_PLL1_PLL] = &gpu_pll1_pll_out_main.clkr,
276 [GFX3D_CLK_SRC] = &gfx3d_clk_src.rcg.clkr,
277 [RBCPR_CLK_SRC] = &rbcpr_clk_src.clkr,
278 [RBBMTIMER_CLK_SRC] = &rbbmtimer_clk_src.clkr,
279 [GPUCC_RBCPR_CLK] = &gpucc_rbcpr_clk.clkr,
280 [GPUCC_GFX3D_CLK] = &gpucc_gfx3d_clk.clkr,
281 [GPUCC_RBBMTIMER_CLK] = &gpucc_rbbmtimer_clk.clkr,
282 };
283
284 static const struct regmap_config gpucc_660_regmap_config = {
285 .reg_bits = 32,
286 .reg_stride = 4,
287 .val_bits = 32,
288 .max_register = 0x9034,
289 .fast_io = true,
290 };
291
292 static const struct qcom_cc_desc gpucc_sdm660_desc = {
293 .config = &gpucc_660_regmap_config,
294 .clks = gpucc_sdm660_clocks,
295 .num_clks = ARRAY_SIZE(gpucc_sdm660_clocks),
296 .resets = gpucc_sdm660_resets,
297 .num_resets = ARRAY_SIZE(gpucc_sdm660_resets),
298 .gdscs = gpucc_sdm660_gdscs,
299 .num_gdscs = ARRAY_SIZE(gpucc_sdm660_gdscs),
300 };
301
302 static const struct of_device_id gpucc_sdm660_match_table[] = {
303 { .compatible = "qcom,gpucc-sdm660" },
304 { .compatible = "qcom,gpucc-sdm630" },
305 { }
306 };
307 MODULE_DEVICE_TABLE(of, gpucc_sdm660_match_table);
308
gpucc_sdm660_probe(struct platform_device * pdev)309 static int gpucc_sdm660_probe(struct platform_device *pdev)
310 {
311 struct regmap *regmap;
312 struct alpha_pll_config gpu_pll_config = {
313 .config_ctl_val = 0x4001055b,
314 .alpha = 0xaaaaab00,
315 .alpha_en_mask = BIT(24),
316 .vco_val = 0x2 << 20,
317 .vco_mask = 0x3 << 20,
318 .main_output_mask = 0x1,
319 };
320
321 regmap = qcom_cc_map(pdev, &gpucc_sdm660_desc);
322 if (IS_ERR(regmap))
323 return PTR_ERR(regmap);
324
325 /* 800MHz configuration for GPU PLL0 */
326 gpu_pll_config.l = 0x29;
327 gpu_pll_config.alpha_hi = 0xaa;
328 clk_alpha_pll_configure(&gpu_pll0_pll_out_main, regmap, &gpu_pll_config);
329
330 /* 740MHz configuration for GPU PLL1 */
331 gpu_pll_config.l = 0x26;
332 gpu_pll_config.alpha_hi = 0x8a;
333 clk_alpha_pll_configure(&gpu_pll1_pll_out_main, regmap, &gpu_pll_config);
334
335 return qcom_cc_really_probe(pdev, &gpucc_sdm660_desc, regmap);
336 }
337
338 static struct platform_driver gpucc_sdm660_driver = {
339 .probe = gpucc_sdm660_probe,
340 .driver = {
341 .name = "gpucc-sdm660",
342 .of_match_table = gpucc_sdm660_match_table,
343 },
344 };
345 module_platform_driver(gpucc_sdm660_driver);
346
347 MODULE_DESCRIPTION("Qualcomm SDM630/SDM660 GPUCC Driver");
348 MODULE_LICENSE("GPL v2");
349