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[linux.git] / drivers / pmdomain / amlogic / meson-secure-pwrc.c
1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
2 /*
3  * Copyright (c) 2019 Amlogic, Inc.
4  * Author: Jianxin Pan <[email protected]>
5  */
6
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9 #include <linux/io.h>
10 #include <linux/of.h>
11 #include <linux/platform_device.h>
12 #include <linux/pm_domain.h>
13 #include <dt-bindings/power/meson-a1-power.h>
14 #include <dt-bindings/power/amlogic,c3-pwrc.h>
15 #include <dt-bindings/power/meson-s4-power.h>
16 #include <dt-bindings/power/amlogic,t7-pwrc.h>
17 #include <dt-bindings/power/amlogic,a4-pwrc.h>
18 #include <dt-bindings/power/amlogic,a5-pwrc.h>
19 #include <linux/arm-smccc.h>
20 #include <linux/firmware/meson/meson_sm.h>
21 #include <linux/module.h>
22
23 #define PWRC_ON         1
24 #define PWRC_OFF        0
25 #define PWRC_NO_PARENT  UINT_MAX
26
27 struct meson_secure_pwrc_domain {
28         struct generic_pm_domain base;
29         unsigned int index;
30         unsigned int parent;
31         struct meson_secure_pwrc *pwrc;
32 };
33
34 struct meson_secure_pwrc {
35         struct meson_secure_pwrc_domain *domains;
36         struct genpd_onecell_data xlate;
37         struct meson_sm_firmware *fw;
38 };
39
40 struct meson_secure_pwrc_domain_desc {
41         unsigned int index;
42         unsigned int parent;
43         unsigned int flags;
44         char *name;
45         bool (*is_off)(struct meson_secure_pwrc_domain *pwrc_domain);
46 };
47
48 struct meson_secure_pwrc_domain_data {
49         unsigned int count;
50         const struct meson_secure_pwrc_domain_desc *domains;
51 };
52
53 static bool pwrc_secure_is_off(struct meson_secure_pwrc_domain *pwrc_domain)
54 {
55         int is_off = 1;
56
57         if (meson_sm_call(pwrc_domain->pwrc->fw, SM_A1_PWRC_GET, &is_off,
58                           pwrc_domain->index, 0, 0, 0, 0) < 0)
59                 pr_err("failed to get power domain status\n");
60
61         return is_off;
62 }
63
64 static int meson_secure_pwrc_off(struct generic_pm_domain *domain)
65 {
66         int ret = 0;
67         struct meson_secure_pwrc_domain *pwrc_domain =
68                 container_of(domain, struct meson_secure_pwrc_domain, base);
69
70         if (meson_sm_call(pwrc_domain->pwrc->fw, SM_A1_PWRC_SET, NULL,
71                           pwrc_domain->index, PWRC_OFF, 0, 0, 0) < 0) {
72                 pr_err("failed to set power domain off\n");
73                 ret = -EINVAL;
74         }
75
76         return ret;
77 }
78
79 static int meson_secure_pwrc_on(struct generic_pm_domain *domain)
80 {
81         int ret = 0;
82         struct meson_secure_pwrc_domain *pwrc_domain =
83                 container_of(domain, struct meson_secure_pwrc_domain, base);
84
85         if (meson_sm_call(pwrc_domain->pwrc->fw, SM_A1_PWRC_SET, NULL,
86                           pwrc_domain->index, PWRC_ON, 0, 0, 0) < 0) {
87                 pr_err("failed to set power domain on\n");
88                 ret = -EINVAL;
89         }
90
91         return ret;
92 }
93
94 #define SEC_PD(__name, __flag)                  \
95 [PWRC_##__name##_ID] =                          \
96 {                                               \
97         .name = #__name,                        \
98         .index = PWRC_##__name##_ID,            \
99         .is_off = pwrc_secure_is_off,           \
100         .flags = __flag,                        \
101         .parent = PWRC_NO_PARENT,               \
102 }
103
104 #define TOP_PD(__name, __flag, __parent)        \
105 [PWRC_##__name##_ID] =                          \
106 {                                               \
107         .name = #__name,                        \
108         .index = PWRC_##__name##_ID,            \
109         .is_off = pwrc_secure_is_off,           \
110         .flags = __flag,                        \
111         .parent = __parent,                     \
112 }
113
114 static const struct meson_secure_pwrc_domain_desc a1_pwrc_domains[] = {
115         SEC_PD(DSPA,    0),
116         SEC_PD(DSPB,    0),
117         /* UART should keep working in ATF after suspend and before resume */
118         SEC_PD(UART,    GENPD_FLAG_ALWAYS_ON),
119         /* DMC is for DDR PHY ana/dig and DMC, and should be always on */
120         SEC_PD(DMC,     GENPD_FLAG_ALWAYS_ON),
121         SEC_PD(I2C,     0),
122         SEC_PD(PSRAM,   0),
123         SEC_PD(ACODEC,  0),
124         SEC_PD(AUDIO,   0),
125         SEC_PD(OTP,     0),
126         SEC_PD(DMA,     GENPD_FLAG_ALWAYS_ON | GENPD_FLAG_IRQ_SAFE),
127         SEC_PD(SD_EMMC, 0),
128         SEC_PD(RAMA,    0),
129         /* SRAMB is used as ATF runtime memory, and should be always on */
130         SEC_PD(RAMB,    GENPD_FLAG_ALWAYS_ON),
131         SEC_PD(IR,      0),
132         SEC_PD(SPICC,   0),
133         SEC_PD(SPIFC,   0),
134         SEC_PD(USB,     0),
135         /* NIC is for the Arm NIC-400 interconnect, and should be always on */
136         SEC_PD(NIC,     GENPD_FLAG_ALWAYS_ON),
137         SEC_PD(PDMIN,   0),
138         SEC_PD(RSA,     0),
139 };
140
141 static const struct meson_secure_pwrc_domain_desc a4_pwrc_domains[] = {
142         SEC_PD(A4_AUDIO,        0),
143         SEC_PD(A4_SDIOA,        0),
144         SEC_PD(A4_EMMC, 0),
145         SEC_PD(A4_USB_COMB,     0),
146         SEC_PD(A4_ETH,          0),
147         SEC_PD(A4_VOUT,         0),
148         SEC_PD(A4_AUDIO_PDM,    0),
149         /* DMC is for DDR PHY ana/dig and DMC, and should be always on */
150         SEC_PD(A4_DMC,  GENPD_FLAG_ALWAYS_ON),
151         /* WRAP is secure_top, a lot of modules are included, and should be always on */
152         SEC_PD(A4_SYS_WRAP,     GENPD_FLAG_ALWAYS_ON),
153         SEC_PD(A4_AO_I2C_S,     0),
154         SEC_PD(A4_AO_UART,      0),
155         /* IR is wake up trigger source, and should be always on */
156         SEC_PD(A4_AO_IR,        GENPD_FLAG_ALWAYS_ON),
157 };
158
159 static const struct meson_secure_pwrc_domain_desc a5_pwrc_domains[] = {
160         SEC_PD(A5_NNA,          0),
161         SEC_PD(A5_AUDIO,        0),
162         SEC_PD(A5_SDIOA,        0),
163         SEC_PD(A5_EMMC,         0),
164         SEC_PD(A5_USB_COMB,     0),
165         SEC_PD(A5_ETH,          0),
166         SEC_PD(A5_RSA,          0),
167         SEC_PD(A5_AUDIO_PDM,    0),
168         /* DMC is for DDR PHY ana/dig and DMC, and should be always on */
169         SEC_PD(A5_DMC,          GENPD_FLAG_ALWAYS_ON),
170         /* WRAP is secure_top, a lot of modules are included, and should be always on */
171         SEC_PD(A5_SYS_WRAP,     GENPD_FLAG_ALWAYS_ON),
172         SEC_PD(A5_DSPA,         0),
173 };
174
175 static const struct meson_secure_pwrc_domain_desc c3_pwrc_domains[] = {
176         SEC_PD(C3_NNA,          0),
177         SEC_PD(C3_AUDIO,        0),
178         SEC_PD(C3_SDIOA,        0),
179         SEC_PD(C3_EMMC,         0),
180         SEC_PD(C3_USB_COMB,     0),
181         SEC_PD(C3_SDCARD,       0),
182         /* ETH is for ethernet online wakeup, and should be always on */
183         SEC_PD(C3_ETH,          GENPD_FLAG_ALWAYS_ON),
184         SEC_PD(C3_GE2D,         0),
185         SEC_PD(C3_CVE,          0),
186         SEC_PD(C3_GDC_WRAP,     0),
187         SEC_PD(C3_ISP_TOP,      0),
188         SEC_PD(C3_MIPI_ISP_WRAP, 0),
189         SEC_PD(C3_VCODEC,       0),
190 };
191
192 static const struct meson_secure_pwrc_domain_desc s4_pwrc_domains[] = {
193         SEC_PD(S4_DOS_HEVC,     0),
194         SEC_PD(S4_DOS_VDEC,     0),
195         SEC_PD(S4_VPU_HDMI,     0),
196         SEC_PD(S4_USB_COMB,     0),
197         SEC_PD(S4_GE2D,         0),
198         /* ETH is for ethernet online wakeup, and should be always on */
199         SEC_PD(S4_ETH,          GENPD_FLAG_ALWAYS_ON),
200         SEC_PD(S4_DEMOD,        0),
201         SEC_PD(S4_AUDIO,        0),
202 };
203
204 static const struct meson_secure_pwrc_domain_desc t7_pwrc_domains[] = {
205         SEC_PD(T7_DSPA,         0),
206         SEC_PD(T7_DSPB,         0),
207         TOP_PD(T7_DOS_HCODEC,   0, PWRC_T7_NIC3_ID),
208         TOP_PD(T7_DOS_HEVC,     0, PWRC_T7_NIC3_ID),
209         TOP_PD(T7_DOS_VDEC,     0, PWRC_T7_NIC3_ID),
210         TOP_PD(T7_DOS_WAVE,     0, PWRC_T7_NIC3_ID),
211         SEC_PD(T7_VPU_HDMI,     0),
212         SEC_PD(T7_USB_COMB,     0),
213         SEC_PD(T7_PCIE,         0),
214         TOP_PD(T7_GE2D,         0, PWRC_T7_NIC3_ID),
215         /* SRAMA is used as ATF runtime memory, and should be always on */
216         SEC_PD(T7_SRAMA,        GENPD_FLAG_ALWAYS_ON),
217         /* SRAMB is used as ATF runtime memory, and should be always on */
218         SEC_PD(T7_SRAMB,        GENPD_FLAG_ALWAYS_ON),
219         SEC_PD(T7_HDMIRX,       0),
220         SEC_PD(T7_VI_CLK1,      0),
221         SEC_PD(T7_VI_CLK2,      0),
222         /* ETH is for ethernet online wakeup, and should be always on */
223         SEC_PD(T7_ETH,          GENPD_FLAG_ALWAYS_ON),
224         SEC_PD(T7_ISP,          0),
225         SEC_PD(T7_MIPI_ISP,     0),
226         TOP_PD(T7_GDC,          0, PWRC_T7_NIC3_ID),
227         TOP_PD(T7_DEWARP,       0, PWRC_T7_NIC3_ID),
228         SEC_PD(T7_SDIO_A,       0),
229         SEC_PD(T7_SDIO_B,       0),
230         SEC_PD(T7_EMMC,         0),
231         TOP_PD(T7_MALI_SC0,     0, PWRC_T7_NNA_TOP_ID),
232         TOP_PD(T7_MALI_SC1,     0, PWRC_T7_NNA_TOP_ID),
233         TOP_PD(T7_MALI_SC2,     0, PWRC_T7_NNA_TOP_ID),
234         TOP_PD(T7_MALI_SC3,     0, PWRC_T7_NNA_TOP_ID),
235         SEC_PD(T7_MALI_TOP,     0),
236         TOP_PD(T7_NNA_CORE0,    0, PWRC_T7_NNA_TOP_ID),
237         TOP_PD(T7_NNA_CORE1,    0, PWRC_T7_NNA_TOP_ID),
238         TOP_PD(T7_NNA_CORE2,    0, PWRC_T7_NNA_TOP_ID),
239         TOP_PD(T7_NNA_CORE3,    0, PWRC_T7_NNA_TOP_ID),
240         SEC_PD(T7_NNA_TOP,      0),
241         SEC_PD(T7_DDR0,         GENPD_FLAG_ALWAYS_ON),
242         SEC_PD(T7_DDR1,         GENPD_FLAG_ALWAYS_ON),
243         /* DMC0 is for DDR PHY ana/dig and DMC, and should be always on */
244         SEC_PD(T7_DMC0,         GENPD_FLAG_ALWAYS_ON),
245         /* DMC1 is for DDR PHY ana/dig and DMC, and should be always on */
246         SEC_PD(T7_DMC1,         GENPD_FLAG_ALWAYS_ON),
247         /* NOC is related to clk bus, and should be always on */
248         SEC_PD(T7_NOC,          GENPD_FLAG_ALWAYS_ON),
249         /* NIC is for the Arm NIC-400 interconnect, and should be always on */
250         SEC_PD(T7_NIC2,         GENPD_FLAG_ALWAYS_ON),
251         SEC_PD(T7_NIC3,         0),
252         /* CPU accesses the interleave data to the ddr need cci, and should be always on */
253         SEC_PD(T7_CCI,          GENPD_FLAG_ALWAYS_ON),
254         SEC_PD(T7_MIPI_DSI0,    0),
255         SEC_PD(T7_SPICC0,       0),
256         SEC_PD(T7_SPICC1,       0),
257         SEC_PD(T7_SPICC2,       0),
258         SEC_PD(T7_SPICC3,       0),
259         SEC_PD(T7_SPICC4,       0),
260         SEC_PD(T7_SPICC5,       0),
261         SEC_PD(T7_EDP0,         0),
262         SEC_PD(T7_EDP1,         0),
263         SEC_PD(T7_MIPI_DSI1,    0),
264         SEC_PD(T7_AUDIO,        0),
265 };
266
267 static int meson_secure_pwrc_probe(struct platform_device *pdev)
268 {
269         int i;
270         struct device_node *sm_np;
271         struct meson_secure_pwrc *pwrc;
272         const struct meson_secure_pwrc_domain_data *match;
273
274         match = of_device_get_match_data(&pdev->dev);
275         if (!match) {
276                 dev_err(&pdev->dev, "failed to get match data\n");
277                 return -ENODEV;
278         }
279
280         sm_np = of_find_compatible_node(NULL, NULL, "amlogic,meson-gxbb-sm");
281         if (!sm_np) {
282                 dev_err(&pdev->dev, "no secure-monitor node\n");
283                 return -ENODEV;
284         }
285
286         pwrc = devm_kzalloc(&pdev->dev, sizeof(*pwrc), GFP_KERNEL);
287         if (!pwrc) {
288                 of_node_put(sm_np);
289                 return -ENOMEM;
290         }
291
292         pwrc->fw = meson_sm_get(sm_np);
293         of_node_put(sm_np);
294         if (!pwrc->fw)
295                 return -EPROBE_DEFER;
296
297         pwrc->xlate.domains = devm_kcalloc(&pdev->dev, match->count,
298                                            sizeof(*pwrc->xlate.domains),
299                                            GFP_KERNEL);
300         if (!pwrc->xlate.domains)
301                 return -ENOMEM;
302
303         pwrc->domains = devm_kcalloc(&pdev->dev, match->count,
304                                      sizeof(*pwrc->domains), GFP_KERNEL);
305         if (!pwrc->domains)
306                 return -ENOMEM;
307
308         pwrc->xlate.num_domains = match->count;
309         platform_set_drvdata(pdev, pwrc);
310
311         for (i = 0 ; i < match->count ; ++i) {
312                 struct meson_secure_pwrc_domain *dom = &pwrc->domains[i];
313
314                 if (!match->domains[i].name)
315                         continue;
316
317                 dom->pwrc = pwrc;
318                 dom->index = match->domains[i].index;
319                 dom->parent = match->domains[i].parent;
320                 dom->base.name = match->domains[i].name;
321                 dom->base.flags = match->domains[i].flags;
322                 dom->base.power_on = meson_secure_pwrc_on;
323                 dom->base.power_off = meson_secure_pwrc_off;
324
325                 if (match->domains[i].is_off(dom) && (dom->base.flags & GENPD_FLAG_ALWAYS_ON))
326                         meson_secure_pwrc_on(&dom->base);
327
328                 pm_genpd_init(&dom->base, NULL, match->domains[i].is_off(dom));
329
330                 pwrc->xlate.domains[i] = &dom->base;
331         }
332
333         for (i = 0; i < match->count; i++) {
334                 struct meson_secure_pwrc_domain *dom = pwrc->domains;
335
336                 if (!match->domains[i].name || match->domains[i].parent == PWRC_NO_PARENT)
337                         continue;
338
339                 pm_genpd_add_subdomain(&dom[dom[i].parent].base, &dom[i].base);
340         }
341
342         return of_genpd_add_provider_onecell(pdev->dev.of_node, &pwrc->xlate);
343 }
344
345 static struct meson_secure_pwrc_domain_data meson_secure_a1_pwrc_data = {
346         .domains = a1_pwrc_domains,
347         .count = ARRAY_SIZE(a1_pwrc_domains),
348 };
349
350 static struct meson_secure_pwrc_domain_data amlogic_secure_a4_pwrc_data = {
351         .domains = a4_pwrc_domains,
352         .count = ARRAY_SIZE(a4_pwrc_domains),
353 };
354
355 static struct meson_secure_pwrc_domain_data amlogic_secure_a5_pwrc_data = {
356         .domains = a5_pwrc_domains,
357         .count = ARRAY_SIZE(a5_pwrc_domains),
358 };
359
360 static struct meson_secure_pwrc_domain_data amlogic_secure_c3_pwrc_data = {
361         .domains = c3_pwrc_domains,
362         .count = ARRAY_SIZE(c3_pwrc_domains),
363 };
364
365 static struct meson_secure_pwrc_domain_data meson_secure_s4_pwrc_data = {
366         .domains = s4_pwrc_domains,
367         .count = ARRAY_SIZE(s4_pwrc_domains),
368 };
369
370 static struct meson_secure_pwrc_domain_data amlogic_secure_t7_pwrc_data = {
371         .domains = t7_pwrc_domains,
372         .count = ARRAY_SIZE(t7_pwrc_domains),
373 };
374
375 static const struct of_device_id meson_secure_pwrc_match_table[] = {
376         {
377                 .compatible = "amlogic,meson-a1-pwrc",
378                 .data = &meson_secure_a1_pwrc_data,
379         },
380         {
381                 .compatible = "amlogic,a4-pwrc",
382                 .data = &amlogic_secure_a4_pwrc_data,
383         },
384         {
385                 .compatible = "amlogic,a5-pwrc",
386                 .data = &amlogic_secure_a5_pwrc_data,
387         },
388         {
389                 .compatible = "amlogic,c3-pwrc",
390                 .data = &amlogic_secure_c3_pwrc_data,
391         },
392         {
393                 .compatible = "amlogic,meson-s4-pwrc",
394                 .data = &meson_secure_s4_pwrc_data,
395         },
396         {
397                 .compatible = "amlogic,t7-pwrc",
398                 .data = &amlogic_secure_t7_pwrc_data,
399         },
400         { /* sentinel */ }
401 };
402 MODULE_DEVICE_TABLE(of, meson_secure_pwrc_match_table);
403
404 static struct platform_driver meson_secure_pwrc_driver = {
405         .probe = meson_secure_pwrc_probe,
406         .driver = {
407                 .name           = "meson_secure_pwrc",
408                 .of_match_table = meson_secure_pwrc_match_table,
409         },
410 };
411 module_platform_driver(meson_secure_pwrc_driver);
412 MODULE_DESCRIPTION("Amlogic Meson Secure Power Domains driver");
413 MODULE_LICENSE("Dual MIT/GPL");
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