Commit 4fb96c48c183128c00b21c7858bb05897a1b80de
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reset: uniphier: add reset controller driver for UniPhier SoCs
This is the initial commit for UniPhier reset controller driver. Most code was ported from Linux. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Showing 4 changed files with 387 additions and 0 deletions Side-by-side Diff
arch/arm/Kconfig
drivers/reset/Kconfig
... | ... | @@ -34,5 +34,14 @@ |
34 | 34 | Enable support for manipulating Tegra's on-SoC reset signals via IPC |
35 | 35 | requests to the BPMP (Boot and Power Management Processor). |
36 | 36 | |
37 | +config RESET_UNIPHIER | |
38 | + bool "Reset controller driver for UniPhier SoCs" | |
39 | + depends on ARCH_UNIPHIER | |
40 | + default y | |
41 | + help | |
42 | + Support for reset controllers on UniPhier SoCs. | |
43 | + Say Y if you want to control reset signals provided by System Control | |
44 | + block, Media I/O block, Peripheral Block. | |
45 | + | |
37 | 46 | endmenu |
drivers/reset/Makefile
drivers/reset/reset-uniphier.c
1 | +/* | |
2 | + * Copyright (C) 2016 Socionext Inc. | |
3 | + * Author: Masahiro Yamada <yamada.masahiro@socionext.com> | |
4 | + * | |
5 | + * SPDX-License-Identifier: GPL-2.0+ | |
6 | + */ | |
7 | + | |
8 | +#include <common.h> | |
9 | +#include <reset-uclass.h> | |
10 | +#include <dm/device.h> | |
11 | +#include <linux/bitops.h> | |
12 | +#include <linux/io.h> | |
13 | +#include <linux/sizes.h> | |
14 | + | |
15 | +struct uniphier_reset_data { | |
16 | + unsigned int id; | |
17 | + unsigned int reg; | |
18 | + unsigned int bit; | |
19 | + unsigned int flags; | |
20 | +#define UNIPHIER_RESET_ACTIVE_LOW BIT(0) | |
21 | +}; | |
22 | + | |
23 | +#define UNIPHIER_RESET_ID_END (unsigned int)(-1) | |
24 | + | |
25 | +#define UNIPHIER_RESET_END \ | |
26 | + { .id = UNIPHIER_RESET_ID_END } | |
27 | + | |
28 | +#define UNIPHIER_RESET(_id, _reg, _bit) \ | |
29 | + { \ | |
30 | + .id = (_id), \ | |
31 | + .reg = (_reg), \ | |
32 | + .bit = (_bit), \ | |
33 | + } | |
34 | + | |
35 | +#define UNIPHIER_RESETX(_id, _reg, _bit) \ | |
36 | + { \ | |
37 | + .id = (_id), \ | |
38 | + .reg = (_reg), \ | |
39 | + .bit = (_bit), \ | |
40 | + .flags = UNIPHIER_RESET_ACTIVE_LOW, \ | |
41 | + } | |
42 | + | |
43 | +/* System reset data */ | |
44 | +#define UNIPHIER_SLD3_SYS_RESET_STDMAC(id) \ | |
45 | + UNIPHIER_RESETX((id), 0x2000, 10) | |
46 | + | |
47 | +#define UNIPHIER_LD11_SYS_RESET_STDMAC(id) \ | |
48 | + UNIPHIER_RESETX((id), 0x200c, 8) | |
49 | + | |
50 | +#define UNIPHIER_PRO4_SYS_RESET_GIO(id) \ | |
51 | + UNIPHIER_RESETX((id), 0x2000, 6) | |
52 | + | |
53 | +#define UNIPHIER_LD20_SYS_RESET_GIO(id) \ | |
54 | + UNIPHIER_RESETX((id), 0x200c, 5) | |
55 | + | |
56 | +#define UNIPHIER_PRO4_SYS_RESET_USB3(id, ch) \ | |
57 | + UNIPHIER_RESETX((id), 0x2000 + 0x4 * (ch), 17) | |
58 | + | |
59 | +const struct uniphier_reset_data uniphier_sld3_sys_reset_data[] = { | |
60 | + UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* Ether, HSC, MIO */ | |
61 | + UNIPHIER_RESET_END, | |
62 | +}; | |
63 | + | |
64 | +const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = { | |
65 | + UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC, MIO, RLE */ | |
66 | + UNIPHIER_PRO4_SYS_RESET_GIO(12), /* Ether, SATA, USB3 */ | |
67 | + UNIPHIER_PRO4_SYS_RESET_USB3(14, 0), | |
68 | + UNIPHIER_PRO4_SYS_RESET_USB3(15, 1), | |
69 | + UNIPHIER_RESET_END, | |
70 | +}; | |
71 | + | |
72 | +const struct uniphier_reset_data uniphier_pro5_sys_reset_data[] = { | |
73 | + UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC */ | |
74 | + UNIPHIER_PRO4_SYS_RESET_GIO(12), /* PCIe, USB3 */ | |
75 | + UNIPHIER_PRO4_SYS_RESET_USB3(14, 0), | |
76 | + UNIPHIER_PRO4_SYS_RESET_USB3(15, 1), | |
77 | + UNIPHIER_RESET_END, | |
78 | +}; | |
79 | + | |
80 | +const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = { | |
81 | + UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC, RLE */ | |
82 | + UNIPHIER_PRO4_SYS_RESET_USB3(14, 0), | |
83 | + UNIPHIER_PRO4_SYS_RESET_USB3(15, 1), | |
84 | + UNIPHIER_RESETX(16, 0x2014, 4), /* USB30-PHY0 */ | |
85 | + UNIPHIER_RESETX(17, 0x2014, 0), /* USB30-PHY1 */ | |
86 | + UNIPHIER_RESETX(18, 0x2014, 2), /* USB30-PHY2 */ | |
87 | + UNIPHIER_RESETX(20, 0x2014, 5), /* USB31-PHY0 */ | |
88 | + UNIPHIER_RESETX(21, 0x2014, 1), /* USB31-PHY1 */ | |
89 | + UNIPHIER_RESETX(28, 0x2014, 12), /* SATA */ | |
90 | + UNIPHIER_RESET(29, 0x2014, 8), /* SATA-PHY (active high) */ | |
91 | + UNIPHIER_RESET_END, | |
92 | +}; | |
93 | + | |
94 | +const struct uniphier_reset_data uniphier_ld11_sys_reset_data[] = { | |
95 | + UNIPHIER_LD11_SYS_RESET_STDMAC(8), /* HSC, MIO */ | |
96 | + UNIPHIER_RESET_END, | |
97 | +}; | |
98 | + | |
99 | +const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = { | |
100 | + UNIPHIER_LD11_SYS_RESET_STDMAC(8), /* HSC */ | |
101 | + UNIPHIER_LD20_SYS_RESET_GIO(12), /* PCIe, USB3 */ | |
102 | + UNIPHIER_RESETX(16, 0x200c, 12), /* USB30-PHY0 */ | |
103 | + UNIPHIER_RESETX(17, 0x200c, 13), /* USB30-PHY1 */ | |
104 | + UNIPHIER_RESETX(18, 0x200c, 14), /* USB30-PHY2 */ | |
105 | + UNIPHIER_RESETX(19, 0x200c, 15), /* USB30-PHY3 */ | |
106 | + UNIPHIER_RESET_END, | |
107 | +}; | |
108 | + | |
109 | +/* Media I/O reset data */ | |
110 | +#define UNIPHIER_MIO_RESET_SD(id, ch) \ | |
111 | + UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 0) | |
112 | + | |
113 | +#define UNIPHIER_MIO_RESET_SD_BRIDGE(id, ch) \ | |
114 | + UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 26) | |
115 | + | |
116 | +#define UNIPHIER_MIO_RESET_EMMC_HW_RESET(id, ch) \ | |
117 | + UNIPHIER_RESETX((id), 0x80 + 0x200 * (ch), 0) | |
118 | + | |
119 | +#define UNIPHIER_MIO_RESET_USB2(id, ch) \ | |
120 | + UNIPHIER_RESETX((id), 0x114 + 0x200 * (ch), 0) | |
121 | + | |
122 | +#define UNIPHIER_MIO_RESET_USB2_BRIDGE(id, ch) \ | |
123 | + UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 24) | |
124 | + | |
125 | +#define UNIPHIER_MIO_RESET_DMAC(id) \ | |
126 | + UNIPHIER_RESETX((id), 0x110, 17) | |
127 | + | |
128 | +const struct uniphier_reset_data uniphier_mio_reset_data[] = { | |
129 | + UNIPHIER_MIO_RESET_SD(0, 0), | |
130 | + UNIPHIER_MIO_RESET_SD(1, 1), | |
131 | + UNIPHIER_MIO_RESET_SD(2, 2), | |
132 | + UNIPHIER_MIO_RESET_SD_BRIDGE(3, 0), | |
133 | + UNIPHIER_MIO_RESET_SD_BRIDGE(4, 1), | |
134 | + UNIPHIER_MIO_RESET_SD_BRIDGE(5, 2), | |
135 | + UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1), | |
136 | + UNIPHIER_MIO_RESET_DMAC(7), | |
137 | + UNIPHIER_MIO_RESET_USB2(8, 0), | |
138 | + UNIPHIER_MIO_RESET_USB2(9, 1), | |
139 | + UNIPHIER_MIO_RESET_USB2(10, 2), | |
140 | + UNIPHIER_MIO_RESET_USB2(11, 3), | |
141 | + UNIPHIER_MIO_RESET_USB2_BRIDGE(12, 0), | |
142 | + UNIPHIER_MIO_RESET_USB2_BRIDGE(13, 1), | |
143 | + UNIPHIER_MIO_RESET_USB2_BRIDGE(14, 2), | |
144 | + UNIPHIER_MIO_RESET_USB2_BRIDGE(15, 3), | |
145 | + UNIPHIER_RESET_END, | |
146 | +}; | |
147 | + | |
148 | +/* Peripheral reset data */ | |
149 | +#define UNIPHIER_PERI_RESET_UART(id, ch) \ | |
150 | + UNIPHIER_RESETX((id), 0x114, 19 + (ch)) | |
151 | + | |
152 | +#define UNIPHIER_PERI_RESET_I2C(id, ch) \ | |
153 | + UNIPHIER_RESETX((id), 0x114, 5 + (ch)) | |
154 | + | |
155 | +#define UNIPHIER_PERI_RESET_FI2C(id, ch) \ | |
156 | + UNIPHIER_RESETX((id), 0x114, 24 + (ch)) | |
157 | + | |
158 | +const struct uniphier_reset_data uniphier_ld4_peri_reset_data[] = { | |
159 | + UNIPHIER_PERI_RESET_UART(0, 0), | |
160 | + UNIPHIER_PERI_RESET_UART(1, 1), | |
161 | + UNIPHIER_PERI_RESET_UART(2, 2), | |
162 | + UNIPHIER_PERI_RESET_UART(3, 3), | |
163 | + UNIPHIER_PERI_RESET_I2C(4, 0), | |
164 | + UNIPHIER_PERI_RESET_I2C(5, 1), | |
165 | + UNIPHIER_PERI_RESET_I2C(6, 2), | |
166 | + UNIPHIER_PERI_RESET_I2C(7, 3), | |
167 | + UNIPHIER_PERI_RESET_I2C(8, 4), | |
168 | + UNIPHIER_RESET_END, | |
169 | +}; | |
170 | + | |
171 | +const struct uniphier_reset_data uniphier_pro4_peri_reset_data[] = { | |
172 | + UNIPHIER_PERI_RESET_UART(0, 0), | |
173 | + UNIPHIER_PERI_RESET_UART(1, 1), | |
174 | + UNIPHIER_PERI_RESET_UART(2, 2), | |
175 | + UNIPHIER_PERI_RESET_UART(3, 3), | |
176 | + UNIPHIER_PERI_RESET_FI2C(4, 0), | |
177 | + UNIPHIER_PERI_RESET_FI2C(5, 1), | |
178 | + UNIPHIER_PERI_RESET_FI2C(6, 2), | |
179 | + UNIPHIER_PERI_RESET_FI2C(7, 3), | |
180 | + UNIPHIER_PERI_RESET_FI2C(8, 4), | |
181 | + UNIPHIER_PERI_RESET_FI2C(9, 5), | |
182 | + UNIPHIER_PERI_RESET_FI2C(10, 6), | |
183 | + UNIPHIER_RESET_END, | |
184 | +}; | |
185 | + | |
186 | +/* core implementaton */ | |
187 | +struct uniphier_reset_priv { | |
188 | + void __iomem *base; | |
189 | + const struct uniphier_reset_data *data; | |
190 | +}; | |
191 | + | |
192 | +static int uniphier_reset_request(struct reset_ctl *reset_ctl) | |
193 | +{ | |
194 | + return 0; | |
195 | +} | |
196 | + | |
197 | +static int uniphier_reset_free(struct reset_ctl *reset_ctl) | |
198 | +{ | |
199 | + return 0; | |
200 | +} | |
201 | + | |
202 | +static int uniphier_reset_update(struct reset_ctl *reset_ctl, int assert) | |
203 | +{ | |
204 | + struct uniphier_reset_priv *priv = dev_get_priv(reset_ctl->dev); | |
205 | + unsigned long id = reset_ctl->id; | |
206 | + const struct uniphier_reset_data *p; | |
207 | + | |
208 | + for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) { | |
209 | + u32 mask, val; | |
210 | + | |
211 | + if (p->id != id) | |
212 | + continue; | |
213 | + | |
214 | + val = readl(priv->base + p->reg); | |
215 | + | |
216 | + if (p->flags & UNIPHIER_RESET_ACTIVE_LOW) | |
217 | + assert = !assert; | |
218 | + | |
219 | + mask = BIT(p->bit); | |
220 | + | |
221 | + if (assert) | |
222 | + val |= mask; | |
223 | + else | |
224 | + val &= ~mask; | |
225 | + | |
226 | + writel(val, priv->base + p->reg); | |
227 | + | |
228 | + return 0; | |
229 | + } | |
230 | + | |
231 | + dev_err(priv->dev, "reset_id=%lu was not handled\n", id); | |
232 | + return -EINVAL; | |
233 | +} | |
234 | + | |
235 | +static int uniphier_reset_assert(struct reset_ctl *reset_ctl) | |
236 | +{ | |
237 | + return uniphier_reset_update(reset_ctl, 1); | |
238 | +} | |
239 | + | |
240 | +static int uniphier_reset_deassert(struct reset_ctl *reset_ctl) | |
241 | +{ | |
242 | + return uniphier_reset_update(reset_ctl, 0); | |
243 | +} | |
244 | + | |
245 | +static const struct reset_ops uniphier_reset_ops = { | |
246 | + .request = uniphier_reset_request, | |
247 | + .free = uniphier_reset_free, | |
248 | + .rst_assert = uniphier_reset_assert, | |
249 | + .rst_deassert = uniphier_reset_deassert, | |
250 | +}; | |
251 | + | |
252 | +static int uniphier_reset_probe(struct udevice *dev) | |
253 | +{ | |
254 | + struct uniphier_reset_priv *priv = dev_get_priv(dev); | |
255 | + fdt_addr_t addr; | |
256 | + | |
257 | + addr = dev_get_addr(dev->parent); | |
258 | + if (addr == FDT_ADDR_T_NONE) | |
259 | + return -EINVAL; | |
260 | + | |
261 | + priv->base = devm_ioremap(dev, addr, SZ_4K); | |
262 | + if (!priv->base) | |
263 | + return -ENOMEM; | |
264 | + | |
265 | + priv->data = (void *)dev_get_driver_data(dev); | |
266 | + | |
267 | + return 0; | |
268 | +} | |
269 | + | |
270 | +static const struct udevice_id uniphier_reset_match[] = { | |
271 | + /* System reset */ | |
272 | + { | |
273 | + .compatible = "socionext,uniphier-sld3-reset", | |
274 | + .data = (ulong)uniphier_sld3_sys_reset_data, | |
275 | + }, | |
276 | + { | |
277 | + .compatible = "socionext,uniphier-ld4-reset", | |
278 | + .data = (ulong)uniphier_sld3_sys_reset_data, | |
279 | + }, | |
280 | + { | |
281 | + .compatible = "socionext,uniphier-pro4-reset", | |
282 | + .data = (ulong)uniphier_pro4_sys_reset_data, | |
283 | + }, | |
284 | + { | |
285 | + .compatible = "socionext,uniphier-sld8-reset", | |
286 | + .data = (ulong)uniphier_sld3_sys_reset_data, | |
287 | + }, | |
288 | + { | |
289 | + .compatible = "socionext,uniphier-pro5-reset", | |
290 | + .data = (ulong)uniphier_pro5_sys_reset_data, | |
291 | + }, | |
292 | + { | |
293 | + .compatible = "socionext,uniphier-pxs2-reset", | |
294 | + .data = (ulong)uniphier_pxs2_sys_reset_data, | |
295 | + }, | |
296 | + { | |
297 | + .compatible = "socionext,uniphier-ld11-reset", | |
298 | + .data = (ulong)uniphier_ld11_sys_reset_data, | |
299 | + }, | |
300 | + { | |
301 | + .compatible = "socionext,uniphier-ld20-reset", | |
302 | + .data = (ulong)uniphier_ld20_sys_reset_data, | |
303 | + }, | |
304 | + /* Media I/O reset */ | |
305 | + { | |
306 | + .compatible = "socionext,uniphier-sld3-mio-clock", | |
307 | + .data = (ulong)uniphier_mio_reset_data, | |
308 | + }, | |
309 | + { | |
310 | + .compatible = "socionext,uniphier-ld4-mio-reset", | |
311 | + .data = (ulong)uniphier_mio_reset_data, | |
312 | + }, | |
313 | + { | |
314 | + .compatible = "socionext,uniphier-pro4-mio-reset", | |
315 | + .data = (ulong)uniphier_mio_reset_data, | |
316 | + }, | |
317 | + { | |
318 | + .compatible = "socionext,uniphier-sld8-mio-reset", | |
319 | + .data = (ulong)uniphier_mio_reset_data, | |
320 | + }, | |
321 | + { | |
322 | + .compatible = "socionext,uniphier-pro5-mio-reset", | |
323 | + .data = (ulong)uniphier_mio_reset_data, | |
324 | + }, | |
325 | + { | |
326 | + .compatible = "socionext,uniphier-pxs2-mio-reset", | |
327 | + .data = (ulong)uniphier_mio_reset_data, | |
328 | + }, | |
329 | + { | |
330 | + .compatible = "socionext,uniphier-ld11-mio-reset", | |
331 | + .data = (ulong)uniphier_mio_reset_data, | |
332 | + }, | |
333 | + { | |
334 | + .compatible = "socionext,uniphier-ld20-mio-reset", | |
335 | + .data = (ulong)uniphier_mio_reset_data, | |
336 | + }, | |
337 | + /* Peripheral reset */ | |
338 | + { | |
339 | + .compatible = "socionext,uniphier-ld4-peri-reset", | |
340 | + .data = (ulong)uniphier_ld4_peri_reset_data, | |
341 | + }, | |
342 | + { | |
343 | + .compatible = "socionext,uniphier-pro4-peri-reset", | |
344 | + .data = (ulong)uniphier_pro4_peri_reset_data, | |
345 | + }, | |
346 | + { | |
347 | + .compatible = "socionext,uniphier-sld8-peri-reset", | |
348 | + .data = (ulong)uniphier_ld4_peri_reset_data, | |
349 | + }, | |
350 | + { | |
351 | + .compatible = "socionext,uniphier-pro5-peri-reset", | |
352 | + .data = (ulong)uniphier_pro4_peri_reset_data, | |
353 | + }, | |
354 | + { | |
355 | + .compatible = "socionext,uniphier-pxs2-peri-reset", | |
356 | + .data = (ulong)uniphier_pro4_peri_reset_data, | |
357 | + }, | |
358 | + { | |
359 | + .compatible = "socionext,uniphier-ld11-peri-reset", | |
360 | + .data = (ulong)uniphier_pro4_peri_reset_data, | |
361 | + }, | |
362 | + { | |
363 | + .compatible = "socionext,uniphier-ld20-peri-reset", | |
364 | + .data = (ulong)uniphier_pro4_peri_reset_data, | |
365 | + }, | |
366 | + { /* sentinel */ } | |
367 | +}; | |
368 | + | |
369 | +U_BOOT_DRIVER(uniphier_reset) = { | |
370 | + .name = "uniphier-reset", | |
371 | + .id = UCLASS_RESET, | |
372 | + .of_match = uniphier_reset_match, | |
373 | + .probe = uniphier_reset_probe, | |
374 | + .priv_auto_alloc_size = sizeof(struct uniphier_reset_priv), | |
375 | + .ops = &uniphier_reset_ops, | |
376 | +}; |