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Masahiro Yamada4fb96c42016-10-08 13:25:31 +09001/*
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>
Simon Glass9d922452017-05-17 17:18:03 -06009#include <dm.h>
Masahiro Yamada4fb96c42016-10-08 13:25:31 +090010#include <reset-uclass.h>
Masahiro Yamada4fb96c42016-10-08 13:25:31 +090011#include <linux/bitops.h>
12#include <linux/io.h>
13#include <linux/sizes.h>
14
15struct 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 */
Masahiro Yamada1d21e1b2017-06-22 16:42:04 +090044static const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = {
Masahiro Yamada6584b1e2017-08-13 09:01:16 +090045 UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
46 UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC */
47 UNIPHIER_RESETX(12, 0x2000, 6), /* GIO */
48 UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
49 UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
Masahiro Yamada4fb96c42016-10-08 13:25:31 +090050 UNIPHIER_RESET_END,
51};
52
Masahiro Yamada1d21e1b2017-06-22 16:42:04 +090053static const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = {
Masahiro Yamada6584b1e2017-08-13 09:01:16 +090054 UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
55 UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC */
56 UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
57 UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
Masahiro Yamada4fb96c42016-10-08 13:25:31 +090058 UNIPHIER_RESETX(16, 0x2014, 4), /* USB30-PHY0 */
59 UNIPHIER_RESETX(17, 0x2014, 0), /* USB30-PHY1 */
60 UNIPHIER_RESETX(18, 0x2014, 2), /* USB30-PHY2 */
61 UNIPHIER_RESETX(20, 0x2014, 5), /* USB31-PHY0 */
62 UNIPHIER_RESETX(21, 0x2014, 1), /* USB31-PHY1 */
63 UNIPHIER_RESETX(28, 0x2014, 12), /* SATA */
64 UNIPHIER_RESET(29, 0x2014, 8), /* SATA-PHY (active high) */
65 UNIPHIER_RESET_END,
66};
67
Masahiro Yamada1d21e1b2017-06-22 16:42:04 +090068static const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = {
Masahiro Yamada6584b1e2017-08-13 09:01:16 +090069 UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */
70 UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */
71 UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC */
72 UNIPHIER_RESETX(12, 0x200c, 5), /* GIO */
Masahiro Yamada4fb96c42016-10-08 13:25:31 +090073 UNIPHIER_RESETX(16, 0x200c, 12), /* USB30-PHY0 */
74 UNIPHIER_RESETX(17, 0x200c, 13), /* USB30-PHY1 */
75 UNIPHIER_RESETX(18, 0x200c, 14), /* USB30-PHY2 */
76 UNIPHIER_RESETX(19, 0x200c, 15), /* USB30-PHY3 */
77 UNIPHIER_RESET_END,
78};
79
Masahiro Yamada111689e2017-08-29 12:20:51 +090080static const struct uniphier_reset_data uniphier_pxs3_sys_reset_data[] = {
81 UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */
82 UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */
83 UNIPHIER_RESETX(8, 0x200c, 12), /* STDMAC */
84 UNIPHIER_RESETX(12, 0x200c, 5), /* USB30 (GIO0) */
85 UNIPHIER_RESETX(13, 0x200c, 6), /* USB31 (GIO1) */
86 UNIPHIER_RESETX(16, 0x200c, 16), /* USB30-PHY */
87 UNIPHIER_RESETX(20, 0x200c, 17), /* USB31-PHY */
88 UNIPHIER_RESET_END,
89};
90
Masahiro Yamada4fb96c42016-10-08 13:25:31 +090091/* Media I/O reset data */
92#define UNIPHIER_MIO_RESET_SD(id, ch) \
93 UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 0)
94
95#define UNIPHIER_MIO_RESET_SD_BRIDGE(id, ch) \
96 UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 26)
97
98#define UNIPHIER_MIO_RESET_EMMC_HW_RESET(id, ch) \
99 UNIPHIER_RESETX((id), 0x80 + 0x200 * (ch), 0)
100
101#define UNIPHIER_MIO_RESET_USB2(id, ch) \
102 UNIPHIER_RESETX((id), 0x114 + 0x200 * (ch), 0)
103
104#define UNIPHIER_MIO_RESET_USB2_BRIDGE(id, ch) \
105 UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 24)
106
107#define UNIPHIER_MIO_RESET_DMAC(id) \
108 UNIPHIER_RESETX((id), 0x110, 17)
109
Masahiro Yamada1d21e1b2017-06-22 16:42:04 +0900110static const struct uniphier_reset_data uniphier_mio_reset_data[] = {
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900111 UNIPHIER_MIO_RESET_SD(0, 0),
112 UNIPHIER_MIO_RESET_SD(1, 1),
113 UNIPHIER_MIO_RESET_SD(2, 2),
114 UNIPHIER_MIO_RESET_SD_BRIDGE(3, 0),
115 UNIPHIER_MIO_RESET_SD_BRIDGE(4, 1),
116 UNIPHIER_MIO_RESET_SD_BRIDGE(5, 2),
117 UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1),
118 UNIPHIER_MIO_RESET_DMAC(7),
119 UNIPHIER_MIO_RESET_USB2(8, 0),
120 UNIPHIER_MIO_RESET_USB2(9, 1),
121 UNIPHIER_MIO_RESET_USB2(10, 2),
122 UNIPHIER_MIO_RESET_USB2(11, 3),
123 UNIPHIER_MIO_RESET_USB2_BRIDGE(12, 0),
124 UNIPHIER_MIO_RESET_USB2_BRIDGE(13, 1),
125 UNIPHIER_MIO_RESET_USB2_BRIDGE(14, 2),
126 UNIPHIER_MIO_RESET_USB2_BRIDGE(15, 3),
127 UNIPHIER_RESET_END,
128};
129
130/* Peripheral reset data */
131#define UNIPHIER_PERI_RESET_UART(id, ch) \
132 UNIPHIER_RESETX((id), 0x114, 19 + (ch))
133
134#define UNIPHIER_PERI_RESET_I2C(id, ch) \
135 UNIPHIER_RESETX((id), 0x114, 5 + (ch))
136
137#define UNIPHIER_PERI_RESET_FI2C(id, ch) \
138 UNIPHIER_RESETX((id), 0x114, 24 + (ch))
139
Masahiro Yamada1d21e1b2017-06-22 16:42:04 +0900140static const struct uniphier_reset_data uniphier_ld4_peri_reset_data[] = {
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900141 UNIPHIER_PERI_RESET_UART(0, 0),
142 UNIPHIER_PERI_RESET_UART(1, 1),
143 UNIPHIER_PERI_RESET_UART(2, 2),
144 UNIPHIER_PERI_RESET_UART(3, 3),
145 UNIPHIER_PERI_RESET_I2C(4, 0),
146 UNIPHIER_PERI_RESET_I2C(5, 1),
147 UNIPHIER_PERI_RESET_I2C(6, 2),
148 UNIPHIER_PERI_RESET_I2C(7, 3),
149 UNIPHIER_PERI_RESET_I2C(8, 4),
150 UNIPHIER_RESET_END,
151};
152
Masahiro Yamada1d21e1b2017-06-22 16:42:04 +0900153static const struct uniphier_reset_data uniphier_pro4_peri_reset_data[] = {
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900154 UNIPHIER_PERI_RESET_UART(0, 0),
155 UNIPHIER_PERI_RESET_UART(1, 1),
156 UNIPHIER_PERI_RESET_UART(2, 2),
157 UNIPHIER_PERI_RESET_UART(3, 3),
158 UNIPHIER_PERI_RESET_FI2C(4, 0),
159 UNIPHIER_PERI_RESET_FI2C(5, 1),
160 UNIPHIER_PERI_RESET_FI2C(6, 2),
161 UNIPHIER_PERI_RESET_FI2C(7, 3),
162 UNIPHIER_PERI_RESET_FI2C(8, 4),
163 UNIPHIER_PERI_RESET_FI2C(9, 5),
164 UNIPHIER_PERI_RESET_FI2C(10, 6),
165 UNIPHIER_RESET_END,
166};
167
168/* core implementaton */
169struct uniphier_reset_priv {
170 void __iomem *base;
171 const struct uniphier_reset_data *data;
172};
173
174static int uniphier_reset_request(struct reset_ctl *reset_ctl)
175{
176 return 0;
177}
178
179static int uniphier_reset_free(struct reset_ctl *reset_ctl)
180{
181 return 0;
182}
183
184static int uniphier_reset_update(struct reset_ctl *reset_ctl, int assert)
185{
186 struct uniphier_reset_priv *priv = dev_get_priv(reset_ctl->dev);
187 unsigned long id = reset_ctl->id;
188 const struct uniphier_reset_data *p;
189
190 for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) {
191 u32 mask, val;
192
193 if (p->id != id)
194 continue;
195
196 val = readl(priv->base + p->reg);
197
198 if (p->flags & UNIPHIER_RESET_ACTIVE_LOW)
199 assert = !assert;
200
201 mask = BIT(p->bit);
202
203 if (assert)
204 val |= mask;
205 else
206 val &= ~mask;
207
208 writel(val, priv->base + p->reg);
209
210 return 0;
211 }
212
213 dev_err(priv->dev, "reset_id=%lu was not handled\n", id);
214 return -EINVAL;
215}
216
217static int uniphier_reset_assert(struct reset_ctl *reset_ctl)
218{
219 return uniphier_reset_update(reset_ctl, 1);
220}
221
222static int uniphier_reset_deassert(struct reset_ctl *reset_ctl)
223{
224 return uniphier_reset_update(reset_ctl, 0);
225}
226
227static const struct reset_ops uniphier_reset_ops = {
228 .request = uniphier_reset_request,
229 .free = uniphier_reset_free,
230 .rst_assert = uniphier_reset_assert,
231 .rst_deassert = uniphier_reset_deassert,
232};
233
234static int uniphier_reset_probe(struct udevice *dev)
235{
236 struct uniphier_reset_priv *priv = dev_get_priv(dev);
237 fdt_addr_t addr;
238
Simon Glassa821c4a2017-05-17 17:18:05 -0600239 addr = devfdt_get_addr(dev->parent);
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900240 if (addr == FDT_ADDR_T_NONE)
241 return -EINVAL;
242
243 priv->base = devm_ioremap(dev, addr, SZ_4K);
244 if (!priv->base)
245 return -ENOMEM;
246
247 priv->data = (void *)dev_get_driver_data(dev);
248
249 return 0;
250}
251
252static const struct udevice_id uniphier_reset_match[] = {
253 /* System reset */
254 {
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900255 .compatible = "socionext,uniphier-ld4-reset",
Masahiro Yamada6584b1e2017-08-13 09:01:16 +0900256 .data = (ulong)uniphier_pro4_sys_reset_data,
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900257 },
258 {
259 .compatible = "socionext,uniphier-pro4-reset",
260 .data = (ulong)uniphier_pro4_sys_reset_data,
261 },
262 {
263 .compatible = "socionext,uniphier-sld8-reset",
Masahiro Yamada6584b1e2017-08-13 09:01:16 +0900264 .data = (ulong)uniphier_pro4_sys_reset_data,
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900265 },
266 {
267 .compatible = "socionext,uniphier-pro5-reset",
Masahiro Yamada6584b1e2017-08-13 09:01:16 +0900268 .data = (ulong)uniphier_pro4_sys_reset_data,
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900269 },
270 {
271 .compatible = "socionext,uniphier-pxs2-reset",
272 .data = (ulong)uniphier_pxs2_sys_reset_data,
273 },
274 {
275 .compatible = "socionext,uniphier-ld11-reset",
Masahiro Yamada6584b1e2017-08-13 09:01:16 +0900276 .data = (ulong)uniphier_ld20_sys_reset_data,
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900277 },
278 {
279 .compatible = "socionext,uniphier-ld20-reset",
280 .data = (ulong)uniphier_ld20_sys_reset_data,
281 },
Masahiro Yamada111689e2017-08-29 12:20:51 +0900282 {
283 .compatible = "socionext,uniphier-pxs3-reset",
284 .data = (ulong)uniphier_pxs3_sys_reset_data,
285 },
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900286 /* Media I/O reset */
287 {
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900288 .compatible = "socionext,uniphier-ld4-mio-reset",
289 .data = (ulong)uniphier_mio_reset_data,
290 },
291 {
292 .compatible = "socionext,uniphier-pro4-mio-reset",
293 .data = (ulong)uniphier_mio_reset_data,
294 },
295 {
296 .compatible = "socionext,uniphier-sld8-mio-reset",
297 .data = (ulong)uniphier_mio_reset_data,
298 },
299 {
300 .compatible = "socionext,uniphier-pro5-mio-reset",
301 .data = (ulong)uniphier_mio_reset_data,
302 },
303 {
304 .compatible = "socionext,uniphier-pxs2-mio-reset",
305 .data = (ulong)uniphier_mio_reset_data,
306 },
307 {
308 .compatible = "socionext,uniphier-ld11-mio-reset",
309 .data = (ulong)uniphier_mio_reset_data,
310 },
311 {
Masahiro Yamada1fc84d62017-08-29 12:20:50 +0900312 .compatible = "socionext,uniphier-ld11-sd-reset",
313 .data = (ulong)uniphier_mio_reset_data,
314 },
315 {
316 .compatible = "socionext,uniphier-ld20-sd-reset",
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900317 .data = (ulong)uniphier_mio_reset_data,
318 },
Masahiro Yamada111689e2017-08-29 12:20:51 +0900319 {
320 .compatible = "socionext,uniphier-pxs3-sd-reset",
321 .data = (ulong)uniphier_mio_reset_data,
322 },
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900323 /* Peripheral reset */
324 {
325 .compatible = "socionext,uniphier-ld4-peri-reset",
326 .data = (ulong)uniphier_ld4_peri_reset_data,
327 },
328 {
329 .compatible = "socionext,uniphier-pro4-peri-reset",
330 .data = (ulong)uniphier_pro4_peri_reset_data,
331 },
332 {
333 .compatible = "socionext,uniphier-sld8-peri-reset",
334 .data = (ulong)uniphier_ld4_peri_reset_data,
335 },
336 {
337 .compatible = "socionext,uniphier-pro5-peri-reset",
338 .data = (ulong)uniphier_pro4_peri_reset_data,
339 },
340 {
341 .compatible = "socionext,uniphier-pxs2-peri-reset",
342 .data = (ulong)uniphier_pro4_peri_reset_data,
343 },
344 {
345 .compatible = "socionext,uniphier-ld11-peri-reset",
346 .data = (ulong)uniphier_pro4_peri_reset_data,
347 },
348 {
349 .compatible = "socionext,uniphier-ld20-peri-reset",
350 .data = (ulong)uniphier_pro4_peri_reset_data,
351 },
Masahiro Yamada111689e2017-08-29 12:20:51 +0900352 {
353 .compatible = "socionext,uniphier-pxs3-peri-reset",
354 .data = (ulong)uniphier_pro4_peri_reset_data,
355 },
Masahiro Yamada4fb96c42016-10-08 13:25:31 +0900356 { /* sentinel */ }
357};
358
359U_BOOT_DRIVER(uniphier_reset) = {
360 .name = "uniphier-reset",
361 .id = UCLASS_RESET,
362 .of_match = uniphier_reset_match,
363 .probe = uniphier_reset_probe,
364 .priv_auto_alloc_size = sizeof(struct uniphier_reset_priv),
365 .ops = &uniphier_reset_ops,
366};