1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Actions Semi Owl Smart Power System (SPS)
4 *
5 * Copyright 2012 Actions Semi Inc.
6 * Author: Actions Semi, Inc.
7 *
8 * Copyright (c) 2017 Andreas Färber
9 */
10
11 #include <linux/of_address.h>
12 #include <linux/of_platform.h>
13 #include <linux/pm_domain.h>
14 #include <linux/soc/actions/owl-sps.h>
15 #include <dt-bindings/power/owl-s500-powergate.h>
16 #include <dt-bindings/power/owl-s700-powergate.h>
17 #include <dt-bindings/power/owl-s900-powergate.h>
18
19 struct owl_sps_domain_info {
20 const char *name;
21 int pwr_bit;
22 int ack_bit;
23 unsigned int genpd_flags;
24 };
25
26 struct owl_sps_info {
27 unsigned num_domains;
28 const struct owl_sps_domain_info *domains;
29 };
30
31 struct owl_sps {
32 struct device *dev;
33 const struct owl_sps_info *info;
34 void __iomem *base;
35 struct genpd_onecell_data genpd_data;
36 struct generic_pm_domain *domains[];
37 };
38
39 #define to_owl_pd(gpd) container_of(gpd, struct owl_sps_domain, genpd)
40
41 struct owl_sps_domain {
42 struct generic_pm_domain genpd;
43 const struct owl_sps_domain_info *info;
44 struct owl_sps *sps;
45 };
46
owl_sps_set_power(struct owl_sps_domain * pd,bool enable)47 static int owl_sps_set_power(struct owl_sps_domain *pd, bool enable)
48 {
49 u32 pwr_mask, ack_mask;
50
51 ack_mask = BIT(pd->info->ack_bit);
52 pwr_mask = BIT(pd->info->pwr_bit);
53
54 return owl_sps_set_pg(pd->sps->base, pwr_mask, ack_mask, enable);
55 }
56
owl_sps_power_on(struct generic_pm_domain * domain)57 static int owl_sps_power_on(struct generic_pm_domain *domain)
58 {
59 struct owl_sps_domain *pd = to_owl_pd(domain);
60
61 dev_dbg(pd->sps->dev, "%s power on", pd->info->name);
62
63 return owl_sps_set_power(pd, true);
64 }
65
owl_sps_power_off(struct generic_pm_domain * domain)66 static int owl_sps_power_off(struct generic_pm_domain *domain)
67 {
68 struct owl_sps_domain *pd = to_owl_pd(domain);
69
70 dev_dbg(pd->sps->dev, "%s power off", pd->info->name);
71
72 return owl_sps_set_power(pd, false);
73 }
74
owl_sps_init_domain(struct owl_sps * sps,int index)75 static int owl_sps_init_domain(struct owl_sps *sps, int index)
76 {
77 struct owl_sps_domain *pd;
78
79 pd = devm_kzalloc(sps->dev, sizeof(*pd), GFP_KERNEL);
80 if (!pd)
81 return -ENOMEM;
82
83 pd->info = &sps->info->domains[index];
84 pd->sps = sps;
85
86 pd->genpd.name = pd->info->name;
87 pd->genpd.power_on = owl_sps_power_on;
88 pd->genpd.power_off = owl_sps_power_off;
89 pd->genpd.flags = pd->info->genpd_flags;
90 pm_genpd_init(&pd->genpd, NULL, false);
91
92 sps->genpd_data.domains[index] = &pd->genpd;
93
94 return 0;
95 }
96
owl_sps_probe(struct platform_device * pdev)97 static int owl_sps_probe(struct platform_device *pdev)
98 {
99 const struct of_device_id *match;
100 const struct owl_sps_info *sps_info;
101 struct owl_sps *sps;
102 int i, ret;
103
104 if (!pdev->dev.of_node) {
105 dev_err(&pdev->dev, "no device node\n");
106 return -ENODEV;
107 }
108
109 match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev);
110 if (!match || !match->data) {
111 dev_err(&pdev->dev, "unknown compatible or missing data\n");
112 return -EINVAL;
113 }
114
115 sps_info = match->data;
116
117 sps = devm_kzalloc(&pdev->dev,
118 struct_size(sps, domains, sps_info->num_domains),
119 GFP_KERNEL);
120 if (!sps)
121 return -ENOMEM;
122
123 sps->base = of_io_request_and_map(pdev->dev.of_node, 0, "owl-sps");
124 if (IS_ERR(sps->base)) {
125 dev_err(&pdev->dev, "failed to map sps registers\n");
126 return PTR_ERR(sps->base);
127 }
128
129 sps->dev = &pdev->dev;
130 sps->info = sps_info;
131 sps->genpd_data.domains = sps->domains;
132 sps->genpd_data.num_domains = sps_info->num_domains;
133
134 for (i = 0; i < sps_info->num_domains; i++) {
135 ret = owl_sps_init_domain(sps, i);
136 if (ret)
137 return ret;
138 }
139
140 ret = of_genpd_add_provider_onecell(pdev->dev.of_node, &sps->genpd_data);
141 if (ret) {
142 dev_err(&pdev->dev, "failed to add provider (%d)", ret);
143 return ret;
144 }
145
146 return 0;
147 }
148
149 static const struct owl_sps_domain_info s500_sps_domains[] = {
150 [S500_PD_VDE] = {
151 .name = "VDE",
152 .pwr_bit = 0,
153 .ack_bit = 16,
154 },
155 [S500_PD_VCE_SI] = {
156 .name = "VCE_SI",
157 .pwr_bit = 1,
158 .ack_bit = 17,
159 },
160 [S500_PD_USB2_1] = {
161 .name = "USB2_1",
162 .pwr_bit = 2,
163 .ack_bit = 18,
164 },
165 [S500_PD_CPU2] = {
166 .name = "CPU2",
167 .pwr_bit = 5,
168 .ack_bit = 21,
169 .genpd_flags = GENPD_FLAG_ALWAYS_ON,
170 },
171 [S500_PD_CPU3] = {
172 .name = "CPU3",
173 .pwr_bit = 6,
174 .ack_bit = 22,
175 .genpd_flags = GENPD_FLAG_ALWAYS_ON,
176 },
177 [S500_PD_DMA] = {
178 .name = "DMA",
179 .pwr_bit = 8,
180 .ack_bit = 12,
181 },
182 [S500_PD_DS] = {
183 .name = "DS",
184 .pwr_bit = 9,
185 .ack_bit = 13,
186 },
187 [S500_PD_USB3] = {
188 .name = "USB3",
189 .pwr_bit = 10,
190 .ack_bit = 14,
191 },
192 [S500_PD_USB2_0] = {
193 .name = "USB2_0",
194 .pwr_bit = 11,
195 .ack_bit = 15,
196 },
197 };
198
199 static const struct owl_sps_info s500_sps_info = {
200 .num_domains = ARRAY_SIZE(s500_sps_domains),
201 .domains = s500_sps_domains,
202 };
203
204 static const struct owl_sps_domain_info s700_sps_domains[] = {
205 [S700_PD_VDE] = {
206 .name = "VDE",
207 .pwr_bit = 0,
208 },
209 [S700_PD_VCE_SI] = {
210 .name = "VCE_SI",
211 .pwr_bit = 1,
212 },
213 [S700_PD_USB2_1] = {
214 .name = "USB2_1",
215 .pwr_bit = 2,
216 },
217 [S700_PD_HDE] = {
218 .name = "HDE",
219 .pwr_bit = 7,
220 },
221 [S700_PD_DMA] = {
222 .name = "DMA",
223 .pwr_bit = 8,
224 },
225 [S700_PD_DS] = {
226 .name = "DS",
227 .pwr_bit = 9,
228 },
229 [S700_PD_USB3] = {
230 .name = "USB3",
231 .pwr_bit = 10,
232 },
233 [S700_PD_USB2_0] = {
234 .name = "USB2_0",
235 .pwr_bit = 11,
236 },
237 };
238
239 static const struct owl_sps_info s700_sps_info = {
240 .num_domains = ARRAY_SIZE(s700_sps_domains),
241 .domains = s700_sps_domains,
242 };
243
244 static const struct owl_sps_domain_info s900_sps_domains[] = {
245 [S900_PD_GPU_B] = {
246 .name = "GPU_B",
247 .pwr_bit = 3,
248 },
249 [S900_PD_VCE] = {
250 .name = "VCE",
251 .pwr_bit = 4,
252 },
253 [S900_PD_SENSOR] = {
254 .name = "SENSOR",
255 .pwr_bit = 5,
256 },
257 [S900_PD_VDE] = {
258 .name = "VDE",
259 .pwr_bit = 6,
260 },
261 [S900_PD_HDE] = {
262 .name = "HDE",
263 .pwr_bit = 7,
264 },
265 [S900_PD_USB3] = {
266 .name = "USB3",
267 .pwr_bit = 8,
268 },
269 [S900_PD_DDR0] = {
270 .name = "DDR0",
271 .pwr_bit = 9,
272 },
273 [S900_PD_DDR1] = {
274 .name = "DDR1",
275 .pwr_bit = 10,
276 },
277 [S900_PD_DE] = {
278 .name = "DE",
279 .pwr_bit = 13,
280 },
281 [S900_PD_NAND] = {
282 .name = "NAND",
283 .pwr_bit = 14,
284 },
285 [S900_PD_USB2_H0] = {
286 .name = "USB2_H0",
287 .pwr_bit = 15,
288 },
289 [S900_PD_USB2_H1] = {
290 .name = "USB2_H1",
291 .pwr_bit = 16,
292 },
293 };
294
295 static const struct owl_sps_info s900_sps_info = {
296 .num_domains = ARRAY_SIZE(s900_sps_domains),
297 .domains = s900_sps_domains,
298 };
299
300 static const struct of_device_id owl_sps_of_matches[] = {
301 { .compatible = "actions,s500-sps", .data = &s500_sps_info },
302 { .compatible = "actions,s700-sps", .data = &s700_sps_info },
303 { .compatible = "actions,s900-sps", .data = &s900_sps_info },
304 { }
305 };
306
307 static struct platform_driver owl_sps_platform_driver = {
308 .probe = owl_sps_probe,
309 .driver = {
310 .name = "owl-sps",
311 .of_match_table = owl_sps_of_matches,
312 .suppress_bind_attrs = true,
313 },
314 };
315
owl_sps_init(void)316 static int __init owl_sps_init(void)
317 {
318 return platform_driver_register(&owl_sps_platform_driver);
319 }
320 postcore_initcall(owl_sps_init);
321