xref: /openbmc/linux/drivers/clk/qcom/gpucc-sdm660.c (revision c4f7ac64) 
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 				.name = "xo"
49 			},
50 			.num_parents = 1,
51 			.ops = &clk_branch2_ops,
52 			.flags = CLK_IS_CRITICAL,
53 		},
54 	},
55 };
56 
57 static struct pll_vco gpu_vco[] = {
58 	{ 1000000000, 2000000000, 0 },
59 	{ 500000000,  1000000000, 2 },
60 	{ 250000000,   500000000, 3 },
61 };
62 
63 static struct clk_alpha_pll gpu_pll0_pll_out_main = {
64 	.offset = 0x0,
65 	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
66 	.vco_table = gpu_vco,
67 	.num_vco = ARRAY_SIZE(gpu_vco),
68 	.clkr.hw.init = &(struct clk_init_data){
69 		.name = "gpu_pll0_pll_out_main",
70 		.parent_data =  &(const struct clk_parent_data){
71 			.hw = &gpucc_cxo_clk.clkr.hw,
72 		},
73 		.num_parents = 1,
74 		.ops = &clk_alpha_pll_ops,
75 	},
76 };
77 
78 static struct clk_alpha_pll gpu_pll1_pll_out_main = {
79 	.offset = 0x40,
80 	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
81 	.vco_table = gpu_vco,
82 	.num_vco = ARRAY_SIZE(gpu_vco),
83 	.clkr.hw.init = &(struct clk_init_data){
84 		.name = "gpu_pll1_pll_out_main",
85 		.parent_data = &(const struct clk_parent_data){
86 			.hw = &gpucc_cxo_clk.clkr.hw,
87 		},
88 		.num_parents = 1,
89 		.ops = &clk_alpha_pll_ops,
90 	},
91 };
92 
93 static const struct parent_map gpucc_parent_map_1[] = {
94 	{ P_GPU_XO, 0 },
95 	{ P_GPU_PLL0_PLL_OUT_MAIN, 1 },
96 	{ P_GPU_PLL1_PLL_OUT_MAIN, 3 },
97 	{ P_GPLL0_OUT_MAIN, 5 },
98 };
99 
100 static const struct clk_parent_data gpucc_parent_data_1[] = {
101 	{ .hw = &gpucc_cxo_clk.clkr.hw },
102 	{ .hw = &gpu_pll0_pll_out_main.clkr.hw },
103 	{ .hw = &gpu_pll1_pll_out_main.clkr.hw },
104 	{ .fw_name = "gcc_gpu_gpll0_clk", .name = "gcc_gpu_gpll0_clk" },
105 };
106 
107 static struct clk_rcg2_gfx3d gfx3d_clk_src = {
108 	.div = 2,
109 	.rcg = {
110 		.cmd_rcgr = 0x1070,
111 		.mnd_width = 0,
112 		.hid_width = 5,
113 		.parent_map = gpucc_parent_map_1,
114 		.clkr.hw.init = &(struct clk_init_data){
115 			.name = "gfx3d_clk_src",
116 			.parent_data = gpucc_parent_data_1,
117 			.num_parents = 4,
118 			.ops = &clk_gfx3d_ops,
119 			.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
120 		},
121 	},
122 	.hws = (struct clk_hw*[]){
123 		&gpucc_cxo_clk.clkr.hw,
124 		&gpu_pll0_pll_out_main.clkr.hw,
125 		&gpu_pll1_pll_out_main.clkr.hw,
126 	}
127 };
128 
129 static struct clk_branch gpucc_gfx3d_clk = {
130 	.halt_reg = 0x1098,
131 	.halt_check = BRANCH_HALT,
132 	.hwcg_reg = 0x1098,
133 	.hwcg_bit = 1,
134 	.clkr = {
135 		.enable_reg = 0x1098,
136 		.enable_mask = BIT(0),
137 		.hw.init = &(struct clk_init_data){
138 			.name = "gpucc_gfx3d_clk",
139 			.parent_data = &(const struct clk_parent_data){
140 				.hw = &gfx3d_clk_src.rcg.clkr.hw,
141 			},
142 			.num_parents = 1,
143 			.ops = &clk_branch2_ops,
144 			.flags = CLK_SET_RATE_PARENT,
145 		},
146 	},
147 };
148 
149 static const struct parent_map gpucc_parent_map_0[] = {
150 	{ P_GPU_XO, 0 },
151 	{ P_GPLL0_OUT_MAIN, 5 },
152 	{ P_GPLL0_OUT_MAIN_DIV, 6 },
153 };
154 
155 static const struct clk_parent_data gpucc_parent_data_0[] = {
156 	{ .hw = &gpucc_cxo_clk.clkr.hw },
157 	{ .fw_name = "gcc_gpu_gpll0_clk", .name = "gcc_gpu_gpll0_clk" },
158 	{ .fw_name = "gcc_gpu_gpll0_div_clk", .name = "gcc_gpu_gpll0_div_clk" },
159 };
160 
161 static const struct freq_tbl ftbl_rbbmtimer_clk_src[] = {
162 	F(19200000, P_GPU_XO, 1, 0, 0),
163 	{ }
164 };
165 
166 static struct clk_rcg2 rbbmtimer_clk_src = {
167 	.cmd_rcgr = 0x10b0,
168 	.mnd_width = 0,
169 	.hid_width = 5,
170 	.parent_map = gpucc_parent_map_0,
171 	.freq_tbl = ftbl_rbbmtimer_clk_src,
172 	.clkr.hw.init = &(struct clk_init_data){
173 		.name = "rbbmtimer_clk_src",
174 		.parent_data = gpucc_parent_data_0,
175 		.num_parents = 3,
176 		.ops = &clk_rcg2_ops,
177 	},
178 };
179 
180 static const struct freq_tbl ftbl_rbcpr_clk_src[] = {
181 	F(19200000, P_GPU_XO, 1, 0, 0),
182 	F(50000000, P_GPLL0_OUT_MAIN_DIV, 6, 0, 0),
183 	{ }
184 };
185 
186 static struct clk_rcg2 rbcpr_clk_src = {
187 	.cmd_rcgr = 0x1030,
188 	.mnd_width = 0,
189 	.hid_width = 5,
190 	.parent_map = gpucc_parent_map_0,
191 	.freq_tbl = ftbl_rbcpr_clk_src,
192 	.clkr.hw.init = &(struct clk_init_data){
193 		.name = "rbcpr_clk_src",
194 		.parent_data = gpucc_parent_data_0,
195 		.num_parents = 3,
196 		.ops = &clk_rcg2_ops,
197 	},
198 };
199 
200 static struct clk_branch gpucc_rbbmtimer_clk = {
201 	.halt_reg = 0x10d0,
202 	.halt_check = BRANCH_HALT,
203 	.clkr = {
204 		.enable_reg = 0x10d0,
205 		.enable_mask = BIT(0),
206 		.hw.init = &(struct clk_init_data){
207 			.name = "gpucc_rbbmtimer_clk",
208 			.parent_names = (const char *[]){
209 				"rbbmtimer_clk_src",
210 			},
211 			.num_parents = 1,
212 			.flags = CLK_SET_RATE_PARENT,
213 			.ops = &clk_branch2_ops,
214 		},
215 	},
216 };
217 
218 static struct clk_branch gpucc_rbcpr_clk = {
219 	.halt_reg = 0x1054,
220 	.halt_check = BRANCH_HALT,
221 	.clkr = {
222 		.enable_reg = 0x1054,
223 		.enable_mask = BIT(0),
224 		.hw.init = &(struct clk_init_data){
225 			.name = "gpucc_rbcpr_clk",
226 			.parent_names = (const char *[]){
227 				"rbcpr_clk_src",
228 			},
229 			.num_parents = 1,
230 			.flags = CLK_SET_RATE_PARENT,
231 			.ops = &clk_branch2_ops,
232 		},
233 	},
234 };
235 
236 static struct gdsc gpu_cx_gdsc = {
237 	.gdscr = 0x1004,
238 	.gds_hw_ctrl = 0x1008,
239 	.pd = {
240 		.name = "gpu_cx",
241 	},
242 	.pwrsts = PWRSTS_OFF_ON,
243 	.flags = VOTABLE,
244 };
245 
246 static struct gdsc gpu_gx_gdsc = {
247 	.gdscr = 0x1094,
248 	.clamp_io_ctrl = 0x130,
249 	.resets = (unsigned int []){ GPU_GX_BCR },
250 	.reset_count = 1,
251 	.cxcs = (unsigned int []){ 0x1098 },
252 	.cxc_count = 1,
253 	.pd = {
254 		.name = "gpu_gx",
255 	},
256 	.parent = &gpu_cx_gdsc.pd,
257 	.pwrsts = PWRSTS_OFF | PWRSTS_ON | PWRSTS_RET,
258 	.flags = CLAMP_IO | SW_RESET | AON_RESET | NO_RET_PERIPH,
259 };
260 
261 static struct gdsc *gpucc_sdm660_gdscs[] = {
262 	[GPU_CX_GDSC] = &gpu_cx_gdsc,
263 	[GPU_GX_GDSC] = &gpu_gx_gdsc,
264 };
265 
266 static const struct qcom_reset_map gpucc_sdm660_resets[] = {
267 	[GPU_CX_BCR] = { 0x1000 },
268 	[RBCPR_BCR] = { 0x1050 },
269 	[GPU_GX_BCR] = { 0x1090 },
270 	[SPDM_BCR] = { 0x10E0 },
271 };
272 
273 static struct clk_regmap *gpucc_sdm660_clocks[] = {
274 	[GPUCC_CXO_CLK] = &gpucc_cxo_clk.clkr,
275 	[GPU_PLL0_PLL] = &gpu_pll0_pll_out_main.clkr,
276 	[GPU_PLL1_PLL] = &gpu_pll1_pll_out_main.clkr,
277 	[GFX3D_CLK_SRC] = &gfx3d_clk_src.rcg.clkr,
278 	[RBCPR_CLK_SRC] = &rbcpr_clk_src.clkr,
279 	[RBBMTIMER_CLK_SRC] = &rbbmtimer_clk_src.clkr,
280 	[GPUCC_RBCPR_CLK] = &gpucc_rbcpr_clk.clkr,
281 	[GPUCC_GFX3D_CLK] = &gpucc_gfx3d_clk.clkr,
282 	[GPUCC_RBBMTIMER_CLK] = &gpucc_rbbmtimer_clk.clkr,
283 };
284 
285 static const struct regmap_config gpucc_660_regmap_config = {
286 	.reg_bits	= 32,
287 	.reg_stride	= 4,
288 	.val_bits	= 32,
289 	.max_register	= 0x9034,
290 	.fast_io	= true,
291 };
292 
293 static const struct qcom_cc_desc gpucc_sdm660_desc = {
294 	.config = &gpucc_660_regmap_config,
295 	.clks = gpucc_sdm660_clocks,
296 	.num_clks = ARRAY_SIZE(gpucc_sdm660_clocks),
297 	.resets = gpucc_sdm660_resets,
298 	.num_resets = ARRAY_SIZE(gpucc_sdm660_resets),
299 	.gdscs = gpucc_sdm660_gdscs,
300 	.num_gdscs = ARRAY_SIZE(gpucc_sdm660_gdscs),
301 };
302 
303 static const struct of_device_id gpucc_sdm660_match_table[] = {
304 	{ .compatible = "qcom,gpucc-sdm660" },
305 	{ .compatible = "qcom,gpucc-sdm630" },
306 	{ }
307 };
308 MODULE_DEVICE_TABLE(of, gpucc_sdm660_match_table);
309 
310 static int gpucc_sdm660_probe(struct platform_device *pdev)
311 {
312 	struct regmap *regmap;
313 	struct alpha_pll_config gpu_pll_config = {
314 		.config_ctl_val = 0x4001055b,
315 		.alpha = 0xaaaaab00,
316 		.alpha_en_mask = BIT(24),
317 		.vco_val = 0x2 << 20,
318 		.vco_mask = 0x3 << 20,
319 		.main_output_mask = 0x1,
320 	};
321 
322 	regmap = qcom_cc_map(pdev, &gpucc_sdm660_desc);
323 	if (IS_ERR(regmap))
324 		return PTR_ERR(regmap);
325 
326 	/* 800MHz configuration for GPU PLL0 */
327 	gpu_pll_config.l = 0x29;
328 	gpu_pll_config.alpha_hi = 0xaa;
329 	clk_alpha_pll_configure(&gpu_pll0_pll_out_main, regmap, &gpu_pll_config);
330 
331 	/* 740MHz configuration for GPU PLL1 */
332 	gpu_pll_config.l = 0x26;
333 	gpu_pll_config.alpha_hi = 0x8a;
334 	clk_alpha_pll_configure(&gpu_pll1_pll_out_main, regmap, &gpu_pll_config);
335 
336 	return qcom_cc_really_probe(pdev, &gpucc_sdm660_desc, regmap);
337 }
338 
339 static struct platform_driver gpucc_sdm660_driver = {
340 	.probe		= gpucc_sdm660_probe,
341 	.driver		= {
342 		.name	= "gpucc-sdm660",
343 		.of_match_table = gpucc_sdm660_match_table,
344 	},
345 };
346 module_platform_driver(gpucc_sdm660_driver);
347 
348 MODULE_DESCRIPTION("Qualcomm SDM630/SDM660 GPUCC Driver");
349 MODULE_LICENSE("GPL v2");
350