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
27enum {
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 */
34static 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
51static struct pll_vco fabia_vco[] = {
52 { 249600000, 2000000000, 0 },
53 { 125000000, 1000000000, 1 },
54};
55
56static 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
64static 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
77static 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
93static const struct parent_map gpu_xo_gpll0_map[] = {
94 { P_XO, 0 },
95 { P_GPLL0, 5 },
96};
97
98static 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
103static const struct parent_map gpu_xo_gpupll0_map[] = {
104 { P_XO, 0 },
105 { P_GPUPLL0_OUT_EVEN, 1 },
106};
107
108static const struct clk_hw *gpu_xo_gpupll0[] = {
109 &gpucc_cxo_clk.clkr.hw,
110 &gpupll0_out_even.clkr.hw,
111};
112
113static 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
119static 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
132static const struct freq_tbl ftbl_gfx3d_clk_src[] = {
133 { .src = P_GPUPLL0_OUT_EVEN, .pre_div = 3 },
134 { }
135};
136
137static 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
151static const struct freq_tbl ftbl_rbbmtimer_clk_src[] = {
152 F(19200000, P_XO, 1, 0, 0),
153 { }
154};
155
156static 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
169static 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
177static 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
190static 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
205static 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
220static 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
235static 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
249static 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
259static 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
274static 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
288static struct gdsc *gpucc_msm8998_gdscs[] = {
289 [GPU_CX_GDSC] = &gpu_cx_gdsc,
290 [GPU_GX_GDSC] = &gpu_gx_gdsc,
291};
292
293static 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
300static 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
308static 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
318static const struct of_device_id gpucc_msm8998_match_table[] = {
319 { .compatible = "qcom,msm8998-gpucc" },
320 { }
321};
322MODULE_DEVICE_TABLE(of, gpucc_msm8998_match_table);
323
324static int gpucc_msm8998_probe(struct platform_device *pdev)
325{
326 struct regmap *regmap;
327
328 regmap = qcom_cc_map(pdev, desc: &gpucc_msm8998_desc);
329 if (IS_ERR(ptr: regmap))
330 return PTR_ERR(ptr: regmap);
331
332 /* force periph logic on to avoid perf counter corruption */
333 regmap_write_bits(map: regmap, reg: 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(map: regmap, reg: gfx3d_clk.clkr.enable_reg, BIT(0), BIT(0));
336
337 return qcom_cc_really_probe(pdev, desc: &gpucc_msm8998_desc, regmap);
338}
339
340static 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};
347module_platform_driver(gpucc_msm8998_driver);
348
349MODULE_DESCRIPTION("QCOM GPUCC MSM8998 Driver");
350MODULE_LICENSE("GPL v2");
351

source code of linux/drivers/clk/qcom/gpucc-msm8998.c