xref: /openbmc/linux/drivers/clk/qcom/gpucc-sm8250.c (revision 2f164822) 
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
4  */
5 
6 #include <linux/clk-provider.h>
7 #include <linux/module.h>
8 #include <linux/platform_device.h>
9 #include <linux/regmap.h>
10 
11 #include <dt-bindings/clock/qcom,gpucc-sm8250.h>
12 
13 #include "common.h"
14 #include "clk-alpha-pll.h"
15 #include "clk-branch.h"
16 #include "clk-pll.h"
17 #include "clk-rcg.h"
18 #include "clk-regmap.h"
19 #include "reset.h"
20 #include "gdsc.h"
21 
22 #define CX_GMU_CBCR_SLEEP_MASK		0xf
23 #define CX_GMU_CBCR_SLEEP_SHIFT		4
24 #define CX_GMU_CBCR_WAKE_MASK		0xf
25 #define CX_GMU_CBCR_WAKE_SHIFT		8
26 
27 enum {
28 	P_BI_TCXO,
29 	P_GPLL0_OUT_MAIN,
30 	P_GPLL0_OUT_MAIN_DIV,
31 	P_GPU_CC_PLL0_OUT_MAIN,
32 	P_GPU_CC_PLL1_OUT_MAIN,
33 };
34 
35 static struct pll_vco lucid_vco[] = {
36 	{ 249600000, 2000000000, 0 },
37 };
38 
39 static const struct alpha_pll_config gpu_cc_pll1_config = {
40 	.l = 0x1a,
41 	.alpha = 0xaaa,
42 	.config_ctl_val = 0x20485699,
43 	.config_ctl_hi_val = 0x00002261,
44 	.config_ctl_hi1_val = 0x029a699c,
45 	.user_ctl_val = 0x00000000,
46 	.user_ctl_hi_val = 0x00000805,
47 	.user_ctl_hi1_val = 0x00000000,
48 };
49 
50 static struct clk_alpha_pll gpu_cc_pll1 = {
51 	.offset = 0x100,
52 	.vco_table = lucid_vco,
53 	.num_vco = ARRAY_SIZE(lucid_vco),
54 	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID],
55 	.clkr = {
56 		.hw.init = &(struct clk_init_data){
57 			.name = "gpu_cc_pll1",
58 			.parent_data =  &(const struct clk_parent_data){
59 				.fw_name = "bi_tcxo",
60 			},
61 			.num_parents = 1,
62 			.ops = &clk_alpha_pll_lucid_ops,
63 		},
64 	},
65 };
66 
67 static const struct parent_map gpu_cc_parent_map_0[] = {
68 	{ P_BI_TCXO, 0 },
69 	{ P_GPU_CC_PLL1_OUT_MAIN, 3 },
70 	{ P_GPLL0_OUT_MAIN, 5 },
71 	{ P_GPLL0_OUT_MAIN_DIV, 6 },
72 };
73 
74 static const struct clk_parent_data gpu_cc_parent_data_0[] = {
75 	{ .fw_name = "bi_tcxo" },
76 	{ .hw = &gpu_cc_pll1.clkr.hw },
77 	{ .fw_name = "gcc_gpu_gpll0_clk_src" },
78 	{ .fw_name = "gcc_gpu_gpll0_div_clk_src" },
79 };
80 
81 static const struct freq_tbl ftbl_gpu_cc_gmu_clk_src[] = {
82 	F(19200000, P_BI_TCXO, 1, 0, 0),
83 	F(200000000, P_GPLL0_OUT_MAIN_DIV, 1.5, 0, 0),
84 	F(500000000, P_GPU_CC_PLL1_OUT_MAIN, 1, 0, 0),
85 	{ }
86 };
87 
88 static struct clk_rcg2 gpu_cc_gmu_clk_src = {
89 	.cmd_rcgr = 0x1120,
90 	.mnd_width = 0,
91 	.hid_width = 5,
92 	.parent_map = gpu_cc_parent_map_0,
93 	.freq_tbl = ftbl_gpu_cc_gmu_clk_src,
94 	.clkr.hw.init = &(struct clk_init_data){
95 		.name = "gpu_cc_gmu_clk_src",
96 		.parent_data = gpu_cc_parent_data_0,
97 		.num_parents = ARRAY_SIZE(gpu_cc_parent_data_0),
98 		.flags = CLK_SET_RATE_PARENT,
99 		.ops = &clk_rcg2_ops,
100 	},
101 };
102 
103 static struct clk_branch gpu_cc_ahb_clk = {
104 	.halt_reg = 0x1078,
105 	.halt_check = BRANCH_HALT_DELAY,
106 	.clkr = {
107 		.enable_reg = 0x1078,
108 		.enable_mask = BIT(0),
109 		.hw.init = &(struct clk_init_data){
110 			.name = "gpu_cc_ahb_clk",
111 			.ops = &clk_branch2_ops,
112 		},
113 	},
114 };
115 
116 static struct clk_branch gpu_cc_crc_ahb_clk = {
117 	.halt_reg = 0x107c,
118 	.halt_check = BRANCH_HALT_VOTED,
119 	.clkr = {
120 		.enable_reg = 0x107c,
121 		.enable_mask = BIT(0),
122 		.hw.init = &(struct clk_init_data){
123 			.name = "gpu_cc_crc_ahb_clk",
124 			.ops = &clk_branch2_ops,
125 		},
126 	},
127 };
128 
129 static struct clk_branch gpu_cc_cx_apb_clk = {
130 	.halt_reg = 0x1088,
131 	.halt_check = BRANCH_HALT_VOTED,
132 	.clkr = {
133 		.enable_reg = 0x1088,
134 		.enable_mask = BIT(0),
135 		.hw.init = &(struct clk_init_data){
136 			.name = "gpu_cc_cx_apb_clk",
137 			.ops = &clk_branch2_ops,
138 		},
139 	},
140 };
141 
142 static struct clk_branch gpu_cc_cx_gmu_clk = {
143 	.halt_reg = 0x1098,
144 	.halt_check = BRANCH_HALT,
145 	.clkr = {
146 		.enable_reg = 0x1098,
147 		.enable_mask = BIT(0),
148 		.hw.init = &(struct clk_init_data){
149 			.name = "gpu_cc_cx_gmu_clk",
150 			.parent_hws = (const struct clk_hw*[]){
151 				&gpu_cc_gmu_clk_src.clkr.hw,
152 			},
153 			.num_parents = 1,
154 			.flags = CLK_SET_RATE_PARENT,
155 			.ops = &clk_branch2_ops,
156 		},
157 	},
158 };
159 
160 static struct clk_branch gpu_cc_cx_snoc_dvm_clk = {
161 	.halt_reg = 0x108c,
162 	.halt_check = BRANCH_HALT_VOTED,
163 	.clkr = {
164 		.enable_reg = 0x108c,
165 		.enable_mask = BIT(0),
166 		.hw.init = &(struct clk_init_data){
167 			.name = "gpu_cc_cx_snoc_dvm_clk",
168 			.ops = &clk_branch2_ops,
169 		},
170 	},
171 };
172 
173 static struct clk_branch gpu_cc_cxo_aon_clk = {
174 	.halt_reg = 0x1004,
175 	.halt_check = BRANCH_HALT_VOTED,
176 	.clkr = {
177 		.enable_reg = 0x1004,
178 		.enable_mask = BIT(0),
179 		.hw.init = &(struct clk_init_data){
180 			.name = "gpu_cc_cxo_aon_clk",
181 			.ops = &clk_branch2_ops,
182 		},
183 	},
184 };
185 
186 static struct clk_branch gpu_cc_cxo_clk = {
187 	.halt_reg = 0x109c,
188 	.halt_check = BRANCH_HALT,
189 	.clkr = {
190 		.enable_reg = 0x109c,
191 		.enable_mask = BIT(0),
192 		.hw.init = &(struct clk_init_data){
193 			.name = "gpu_cc_cxo_clk",
194 			.ops = &clk_branch2_ops,
195 		},
196 	},
197 };
198 
199 static struct clk_branch gpu_cc_gx_gmu_clk = {
200 	.halt_reg = 0x1064,
201 	.halt_check = BRANCH_HALT,
202 	.clkr = {
203 		.enable_reg = 0x1064,
204 		.enable_mask = BIT(0),
205 		.hw.init = &(struct clk_init_data){
206 			.name = "gpu_cc_gx_gmu_clk",
207 			.parent_hws = (const struct clk_hw*[]){
208 				&gpu_cc_gmu_clk_src.clkr.hw,
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 gpu_cc_hlos1_vote_gpu_smmu_clk = {
218 	.halt_reg = 0x5000,
219 	.halt_check = BRANCH_VOTED,
220 	.clkr = {
221 		.enable_reg = 0x5000,
222 		.enable_mask = BIT(0),
223 		.hw.init = &(struct clk_init_data){
224 			 .name = "gpu_cc_hlos1_vote_gpu_smmu_clk",
225 			 .ops = &clk_branch2_ops,
226 		},
227 	},
228 };
229 
230 static struct gdsc gpu_cx_gdsc = {
231 	.gdscr = 0x106c,
232 	.gds_hw_ctrl = 0x1540,
233 	.pd = {
234 		.name = "gpu_cx_gdsc",
235 	},
236 	.pwrsts = PWRSTS_OFF_ON,
237 	.flags = VOTABLE,
238 };
239 
240 static struct gdsc gpu_gx_gdsc = {
241 	.gdscr = 0x100c,
242 	.clamp_io_ctrl = 0x1508,
243 	.pd = {
244 		.name = "gpu_gx_gdsc",
245 		.power_on = gdsc_gx_do_nothing_enable,
246 	},
247 	.pwrsts = PWRSTS_OFF_ON,
248 	.flags = CLAMP_IO | AON_RESET | POLL_CFG_GDSCR,
249 };
250 
251 static struct clk_regmap *gpu_cc_sm8250_clocks[] = {
252 	[GPU_CC_AHB_CLK] = &gpu_cc_ahb_clk.clkr,
253 	[GPU_CC_CRC_AHB_CLK] = &gpu_cc_crc_ahb_clk.clkr,
254 	[GPU_CC_CX_APB_CLK] = &gpu_cc_cx_apb_clk.clkr,
255 	[GPU_CC_CX_GMU_CLK] = &gpu_cc_cx_gmu_clk.clkr,
256 	[GPU_CC_CX_SNOC_DVM_CLK] = &gpu_cc_cx_snoc_dvm_clk.clkr,
257 	[GPU_CC_CXO_AON_CLK] = &gpu_cc_cxo_aon_clk.clkr,
258 	[GPU_CC_CXO_CLK] = &gpu_cc_cxo_clk.clkr,
259 	[GPU_CC_GMU_CLK_SRC] = &gpu_cc_gmu_clk_src.clkr,
260 	[GPU_CC_GX_GMU_CLK] = &gpu_cc_gx_gmu_clk.clkr,
261 	[GPU_CC_PLL1] = &gpu_cc_pll1.clkr,
262 	[GPU_CC_HLOS1_VOTE_GPU_SMMU_CLK] = &gpu_cc_hlos1_vote_gpu_smmu_clk.clkr,
263 };
264 
265 static const struct qcom_reset_map gpu_cc_sm8250_resets[] = {
266 	[GPUCC_GPU_CC_ACD_BCR] = { 0x1160 },
267 	[GPUCC_GPU_CC_CX_BCR] = { 0x1068 },
268 	[GPUCC_GPU_CC_GFX3D_AON_BCR] = { 0x10a0 },
269 	[GPUCC_GPU_CC_GMU_BCR] = { 0x111c },
270 	[GPUCC_GPU_CC_GX_BCR] = { 0x1008 },
271 	[GPUCC_GPU_CC_XO_BCR] = { 0x1000 },
272 };
273 
274 static struct gdsc *gpu_cc_sm8250_gdscs[] = {
275 	[GPU_CX_GDSC] = &gpu_cx_gdsc,
276 	[GPU_GX_GDSC] = &gpu_gx_gdsc,
277 };
278 
279 static const struct regmap_config gpu_cc_sm8250_regmap_config = {
280 	.reg_bits = 32,
281 	.reg_stride = 4,
282 	.val_bits = 32,
283 	.max_register = 0x8008,
284 	.fast_io = true,
285 };
286 
287 static const struct qcom_cc_desc gpu_cc_sm8250_desc = {
288 	.config = &gpu_cc_sm8250_regmap_config,
289 	.clks = gpu_cc_sm8250_clocks,
290 	.num_clks = ARRAY_SIZE(gpu_cc_sm8250_clocks),
291 	.resets = gpu_cc_sm8250_resets,
292 	.num_resets = ARRAY_SIZE(gpu_cc_sm8250_resets),
293 	.gdscs = gpu_cc_sm8250_gdscs,
294 	.num_gdscs = ARRAY_SIZE(gpu_cc_sm8250_gdscs),
295 };
296 
297 static const struct of_device_id gpu_cc_sm8250_match_table[] = {
298 	{ .compatible = "qcom,sm8250-gpucc" },
299 	{ }
300 };
301 MODULE_DEVICE_TABLE(of, gpu_cc_sm8250_match_table);
302 
303 static int gpu_cc_sm8250_probe(struct platform_device *pdev)
304 {
305 	struct regmap *regmap;
306 	unsigned int value, mask;
307 
308 	regmap = qcom_cc_map(pdev, &gpu_cc_sm8250_desc);
309 	if (IS_ERR(regmap))
310 		return PTR_ERR(regmap);
311 
312 	clk_lucid_pll_configure(&gpu_cc_pll1, regmap, &gpu_cc_pll1_config);
313 
314 	/*
315 	 * Configure gpu_cc_cx_gmu_clk with recommended
316 	 * wakeup/sleep settings
317 	 */
318 	mask = CX_GMU_CBCR_WAKE_MASK << CX_GMU_CBCR_WAKE_SHIFT;
319 	mask |= CX_GMU_CBCR_SLEEP_MASK << CX_GMU_CBCR_SLEEP_SHIFT;
320 	value = 0xf << CX_GMU_CBCR_WAKE_SHIFT | 0xf << CX_GMU_CBCR_SLEEP_SHIFT;
321 	regmap_update_bits(regmap, 0x1098, mask, value);
322 
323 	return qcom_cc_really_probe(pdev, &gpu_cc_sm8250_desc, regmap);
324 }
325 
326 static struct platform_driver gpu_cc_sm8250_driver = {
327 	.probe = gpu_cc_sm8250_probe,
328 	.driver = {
329 		.name = "sm8250-gpucc",
330 		.of_match_table = gpu_cc_sm8250_match_table,
331 	},
332 };
333 
334 static int __init gpu_cc_sm8250_init(void)
335 {
336 	return platform_driver_register(&gpu_cc_sm8250_driver);
337 }
338 subsys_initcall(gpu_cc_sm8250_init);
339 
340 static void __exit gpu_cc_sm8250_exit(void)
341 {
342 	platform_driver_unregister(&gpu_cc_sm8250_driver);
343 }
344 module_exit(gpu_cc_sm8250_exit);
345 
346 MODULE_DESCRIPTION("QTI GPU_CC SM8250 Driver");
347 MODULE_LICENSE("GPL v2");
348