xref: /openbmc/linux/drivers/clk/qcom/gpucc-sc7180.c (revision f21e49be) 
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2019, 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-sc7180.h>
12 
13 #include "clk-alpha-pll.h"
14 #include "clk-branch.h"
15 #include "clk-rcg.h"
16 #include "clk-regmap.h"
17 #include "common.h"
18 #include "gdsc.h"
19 
20 #define CX_GMU_CBCR_SLEEP_MASK		0xF
21 #define CX_GMU_CBCR_SLEEP_SHIFT		4
22 #define CX_GMU_CBCR_WAKE_MASK		0xF
23 #define CX_GMU_CBCR_WAKE_SHIFT		8
24 #define CLK_DIS_WAIT_SHIFT		12
25 #define CLK_DIS_WAIT_MASK		(0xf << CLK_DIS_WAIT_SHIFT)
26 
27 enum {
28 	P_BI_TCXO,
29 	P_GPLL0_OUT_MAIN,
30 	P_GPLL0_OUT_MAIN_DIV,
31 	P_GPU_CC_PLL1_OUT_MAIN,
32 };
33 
34 static const struct pll_vco fabia_vco[] = {
35 	{ 249600000, 2000000000, 0 },
36 };
37 
38 static struct clk_alpha_pll gpu_cc_pll1 = {
39 	.offset = 0x100,
40 	.vco_table = fabia_vco,
41 	.num_vco = ARRAY_SIZE(fabia_vco),
42 	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA],
43 	.clkr = {
44 		.hw.init = &(struct clk_init_data){
45 			.name = "gpu_cc_pll1",
46 			.parent_data =  &(const struct clk_parent_data){
47 				.fw_name = "bi_tcxo",
48 			},
49 			.num_parents = 1,
50 			.ops = &clk_alpha_pll_fabia_ops,
51 		},
52 	},
53 };
54 
55 static const struct parent_map gpu_cc_parent_map_0[] = {
56 	{ P_BI_TCXO, 0 },
57 	{ P_GPU_CC_PLL1_OUT_MAIN, 3 },
58 	{ P_GPLL0_OUT_MAIN, 5 },
59 	{ P_GPLL0_OUT_MAIN_DIV, 6 },
60 };
61 
62 static const struct clk_parent_data gpu_cc_parent_data_0[] = {
63 	{ .fw_name = "bi_tcxo" },
64 	{ .hw = &gpu_cc_pll1.clkr.hw },
65 	{ .fw_name = "gcc_gpu_gpll0_clk_src" },
66 	{ .fw_name = "gcc_gpu_gpll0_div_clk_src" },
67 };
68 
69 static const struct freq_tbl ftbl_gpu_cc_gmu_clk_src[] = {
70 	F(19200000, P_BI_TCXO, 1, 0, 0),
71 	F(200000000, P_GPLL0_OUT_MAIN_DIV, 1.5, 0, 0),
72 	{ }
73 };
74 
75 static struct clk_rcg2 gpu_cc_gmu_clk_src = {
76 	.cmd_rcgr = 0x1120,
77 	.mnd_width = 0,
78 	.hid_width = 5,
79 	.parent_map = gpu_cc_parent_map_0,
80 	.freq_tbl = ftbl_gpu_cc_gmu_clk_src,
81 	.clkr.hw.init = &(struct clk_init_data){
82 		.name = "gpu_cc_gmu_clk_src",
83 		.parent_data = gpu_cc_parent_data_0,
84 		.num_parents = ARRAY_SIZE(gpu_cc_parent_data_0),
85 		.flags = CLK_SET_RATE_PARENT,
86 		.ops = &clk_rcg2_shared_ops,
87 	},
88 };
89 
90 static struct clk_branch gpu_cc_crc_ahb_clk = {
91 	.halt_reg = 0x107c,
92 	.halt_check = BRANCH_HALT_DELAY,
93 	.clkr = {
94 		.enable_reg = 0x107c,
95 		.enable_mask = BIT(0),
96 		.hw.init = &(struct clk_init_data){
97 			.name = "gpu_cc_crc_ahb_clk",
98 			.ops = &clk_branch2_ops,
99 		},
100 	},
101 };
102 
103 static struct clk_branch gpu_cc_cx_gmu_clk = {
104 	.halt_reg = 0x1098,
105 	.halt_check = BRANCH_HALT,
106 	.clkr = {
107 		.enable_reg = 0x1098,
108 		.enable_mask = BIT(0),
109 		.hw.init = &(struct clk_init_data){
110 			.name = "gpu_cc_cx_gmu_clk",
111 			.parent_data =  &(const struct clk_parent_data){
112 				.hw = &gpu_cc_gmu_clk_src.clkr.hw,
113 			},
114 			.num_parents = 1,
115 			.flags = CLK_SET_RATE_PARENT,
116 			.ops = &clk_branch2_ops,
117 		},
118 	},
119 };
120 
121 static struct clk_branch gpu_cc_cx_snoc_dvm_clk = {
122 	.halt_reg = 0x108c,
123 	.halt_check = BRANCH_HALT_DELAY,
124 	.clkr = {
125 		.enable_reg = 0x108c,
126 		.enable_mask = BIT(0),
127 		.hw.init = &(struct clk_init_data){
128 			.name = "gpu_cc_cx_snoc_dvm_clk",
129 			.ops = &clk_branch2_ops,
130 		},
131 	},
132 };
133 
134 static struct clk_branch gpu_cc_cxo_aon_clk = {
135 	.halt_reg = 0x1004,
136 	.halt_check = BRANCH_HALT_DELAY,
137 	.clkr = {
138 		.enable_reg = 0x1004,
139 		.enable_mask = BIT(0),
140 		.hw.init = &(struct clk_init_data){
141 			.name = "gpu_cc_cxo_aon_clk",
142 			.ops = &clk_branch2_ops,
143 		},
144 	},
145 };
146 
147 static struct clk_branch gpu_cc_cxo_clk = {
148 	.halt_reg = 0x109c,
149 	.halt_check = BRANCH_HALT,
150 	.clkr = {
151 		.enable_reg = 0x109c,
152 		.enable_mask = BIT(0),
153 		.hw.init = &(struct clk_init_data){
154 			.name = "gpu_cc_cxo_clk",
155 			.ops = &clk_branch2_ops,
156 		},
157 	},
158 };
159 
160 static struct gdsc cx_gdsc = {
161 	.gdscr = 0x106c,
162 	.gds_hw_ctrl = 0x1540,
163 	.pd = {
164 		.name = "cx_gdsc",
165 	},
166 	.pwrsts = PWRSTS_OFF_ON,
167 	.flags = VOTABLE,
168 };
169 
170 static struct gdsc gx_gdsc = {
171 	.gdscr = 0x100c,
172 	.clamp_io_ctrl = 0x1508,
173 	.pd = {
174 		.name = "gx_gdsc",
175 		.power_on = gdsc_gx_do_nothing_enable,
176 	},
177 	.pwrsts = PWRSTS_OFF_ON,
178 	.flags = CLAMP_IO,
179 };
180 
181 static struct gdsc *gpu_cc_sc7180_gdscs[] = {
182 	[CX_GDSC] = &cx_gdsc,
183 	[GX_GDSC] = &gx_gdsc,
184 };
185 
186 static struct clk_regmap *gpu_cc_sc7180_clocks[] = {
187 	[GPU_CC_CXO_CLK] = &gpu_cc_cxo_clk.clkr,
188 	[GPU_CC_CRC_AHB_CLK] = &gpu_cc_crc_ahb_clk.clkr,
189 	[GPU_CC_CX_GMU_CLK] = &gpu_cc_cx_gmu_clk.clkr,
190 	[GPU_CC_CX_SNOC_DVM_CLK] = &gpu_cc_cx_snoc_dvm_clk.clkr,
191 	[GPU_CC_CXO_AON_CLK] = &gpu_cc_cxo_aon_clk.clkr,
192 	[GPU_CC_GMU_CLK_SRC] = &gpu_cc_gmu_clk_src.clkr,
193 	[GPU_CC_PLL1] = &gpu_cc_pll1.clkr,
194 };
195 
196 static const struct regmap_config gpu_cc_sc7180_regmap_config = {
197 	.reg_bits =	32,
198 	.reg_stride =	4,
199 	.val_bits =	32,
200 	.max_register =	0x8008,
201 	.fast_io =	true,
202 };
203 
204 static const struct qcom_cc_desc gpu_cc_sc7180_desc = {
205 	.config = &gpu_cc_sc7180_regmap_config,
206 	.clks = gpu_cc_sc7180_clocks,
207 	.num_clks = ARRAY_SIZE(gpu_cc_sc7180_clocks),
208 	.gdscs = gpu_cc_sc7180_gdscs,
209 	.num_gdscs = ARRAY_SIZE(gpu_cc_sc7180_gdscs),
210 };
211 
212 static const struct of_device_id gpu_cc_sc7180_match_table[] = {
213 	{ .compatible = "qcom,sc7180-gpucc" },
214 	{ }
215 };
216 MODULE_DEVICE_TABLE(of, gpu_cc_sc7180_match_table);
217 
218 static int gpu_cc_sc7180_probe(struct platform_device *pdev)
219 {
220 	struct regmap *regmap;
221 	struct alpha_pll_config gpu_cc_pll_config = {};
222 	unsigned int value, mask;
223 
224 	regmap = qcom_cc_map(pdev, &gpu_cc_sc7180_desc);
225 	if (IS_ERR(regmap))
226 		return PTR_ERR(regmap);
227 
228 	/* 360MHz Configuration */
229 	gpu_cc_pll_config.l = 0x12;
230 	gpu_cc_pll_config.alpha = 0xc000;
231 	gpu_cc_pll_config.config_ctl_val = 0x20485699;
232 	gpu_cc_pll_config.config_ctl_hi_val = 0x00002067;
233 	gpu_cc_pll_config.user_ctl_val = 0x00000001;
234 	gpu_cc_pll_config.user_ctl_hi_val = 0x00004805;
235 	gpu_cc_pll_config.test_ctl_hi_val = 0x40000000;
236 
237 	clk_fabia_pll_configure(&gpu_cc_pll1, regmap, &gpu_cc_pll_config);
238 
239 	/* Recommended WAKEUP/SLEEP settings for the gpu_cc_cx_gmu_clk */
240 	mask = CX_GMU_CBCR_WAKE_MASK << CX_GMU_CBCR_WAKE_SHIFT;
241 	mask |= CX_GMU_CBCR_SLEEP_MASK << CX_GMU_CBCR_SLEEP_SHIFT;
242 	value = 0xF << CX_GMU_CBCR_WAKE_SHIFT | 0xF << CX_GMU_CBCR_SLEEP_SHIFT;
243 	regmap_update_bits(regmap, 0x1098, mask, value);
244 
245 	/* Configure clk_dis_wait for gpu_cx_gdsc */
246 	regmap_update_bits(regmap, 0x106c, CLK_DIS_WAIT_MASK,
247 						8 << CLK_DIS_WAIT_SHIFT);
248 
249 	return qcom_cc_really_probe(pdev, &gpu_cc_sc7180_desc, regmap);
250 }
251 
252 static struct platform_driver gpu_cc_sc7180_driver = {
253 	.probe = gpu_cc_sc7180_probe,
254 	.driver = {
255 		.name = "sc7180-gpucc",
256 		.of_match_table = gpu_cc_sc7180_match_table,
257 	},
258 };
259 
260 static int __init gpu_cc_sc7180_init(void)
261 {
262 	return platform_driver_register(&gpu_cc_sc7180_driver);
263 }
264 subsys_initcall(gpu_cc_sc7180_init);
265 
266 static void __exit gpu_cc_sc7180_exit(void)
267 {
268 	platform_driver_unregister(&gpu_cc_sc7180_driver);
269 }
270 module_exit(gpu_cc_sc7180_exit);
271 
272 MODULE_DESCRIPTION("QTI GPU_CC SC7180 Driver");
273 MODULE_LICENSE("GPL v2");
274