2 * Copyright (C) 2016 Socionext Inc.
3 * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/mfd/syscon.h>
17 #include <linux/module.h>
19 #include <linux/of_device.h>
20 #include <linux/platform_device.h>
21 #include <linux/regmap.h>
22 #include <linux/reset-controller.h>
24 struct uniphier_reset_data
{
29 #define UNIPHIER_RESET_ACTIVE_LOW BIT(0)
32 #define UNIPHIER_RESET_ID_END (unsigned int)(-1)
34 #define UNIPHIER_RESET_END \
35 { .id = UNIPHIER_RESET_ID_END }
37 #define UNIPHIER_RESET(_id, _reg, _bit) \
44 #define UNIPHIER_RESETX(_id, _reg, _bit) \
49 .flags = UNIPHIER_RESET_ACTIVE_LOW, \
52 /* System reset data */
53 static const struct uniphier_reset_data uniphier_ld4_sys_reset_data
[] = {
54 UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
55 UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (Ether, HSC, MIO) */
59 static const struct uniphier_reset_data uniphier_pro4_sys_reset_data
[] = {
60 UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
61 UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC, MIO, RLE) */
62 UNIPHIER_RESETX(12, 0x2000, 6), /* GIO (Ether, SATA, USB3) */
63 UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
64 UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
68 static const struct uniphier_reset_data uniphier_pro5_sys_reset_data
[] = {
69 UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
70 UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC) */
71 UNIPHIER_RESETX(12, 0x2000, 6), /* GIO (PCIe, USB3) */
72 UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
73 UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
77 static const struct uniphier_reset_data uniphier_pxs2_sys_reset_data
[] = {
78 UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
79 UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC, RLE) */
80 UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
81 UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
82 UNIPHIER_RESETX(16, 0x2014, 4), /* USB30-PHY0 */
83 UNIPHIER_RESETX(17, 0x2014, 0), /* USB30-PHY1 */
84 UNIPHIER_RESETX(18, 0x2014, 2), /* USB30-PHY2 */
85 UNIPHIER_RESETX(20, 0x2014, 5), /* USB31-PHY0 */
86 UNIPHIER_RESETX(21, 0x2014, 1), /* USB31-PHY1 */
87 UNIPHIER_RESETX(28, 0x2014, 12), /* SATA */
88 UNIPHIER_RESET(29, 0x2014, 8), /* SATA-PHY (active high) */
92 static const struct uniphier_reset_data uniphier_ld11_sys_reset_data
[] = {
93 UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */
94 UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */
95 UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC (HSC, MIO) */
96 UNIPHIER_RESETX(40, 0x2008, 0), /* AIO */
97 UNIPHIER_RESETX(41, 0x2008, 1), /* EVEA */
98 UNIPHIER_RESETX(42, 0x2010, 2), /* EXIV */
102 static const struct uniphier_reset_data uniphier_ld20_sys_reset_data
[] = {
103 UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */
104 UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */
105 UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC (HSC) */
106 UNIPHIER_RESETX(12, 0x200c, 5), /* GIO (PCIe, USB3) */
107 UNIPHIER_RESETX(16, 0x200c, 12), /* USB30-PHY0 */
108 UNIPHIER_RESETX(17, 0x200c, 13), /* USB30-PHY1 */
109 UNIPHIER_RESETX(18, 0x200c, 14), /* USB30-PHY2 */
110 UNIPHIER_RESETX(19, 0x200c, 15), /* USB30-PHY3 */
111 UNIPHIER_RESETX(40, 0x2008, 0), /* AIO */
112 UNIPHIER_RESETX(41, 0x2008, 1), /* EVEA */
113 UNIPHIER_RESETX(42, 0x2010, 2), /* EXIV */
117 /* Media I/O reset data */
118 #define UNIPHIER_MIO_RESET_SD(id, ch) \
119 UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 0)
121 #define UNIPHIER_MIO_RESET_SD_BRIDGE(id, ch) \
122 UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 26)
124 #define UNIPHIER_MIO_RESET_EMMC_HW_RESET(id, ch) \
125 UNIPHIER_RESETX((id), 0x80 + 0x200 * (ch), 0)
127 #define UNIPHIER_MIO_RESET_USB2(id, ch) \
128 UNIPHIER_RESETX((id), 0x114 + 0x200 * (ch), 0)
130 #define UNIPHIER_MIO_RESET_USB2_BRIDGE(id, ch) \
131 UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 24)
133 #define UNIPHIER_MIO_RESET_DMAC(id) \
134 UNIPHIER_RESETX((id), 0x110, 17)
136 static const struct uniphier_reset_data uniphier_ld4_mio_reset_data
[] = {
137 UNIPHIER_MIO_RESET_SD(0, 0),
138 UNIPHIER_MIO_RESET_SD(1, 1),
139 UNIPHIER_MIO_RESET_SD(2, 2),
140 UNIPHIER_MIO_RESET_SD_BRIDGE(3, 0),
141 UNIPHIER_MIO_RESET_SD_BRIDGE(4, 1),
142 UNIPHIER_MIO_RESET_SD_BRIDGE(5, 2),
143 UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1),
144 UNIPHIER_MIO_RESET_DMAC(7),
145 UNIPHIER_MIO_RESET_USB2(8, 0),
146 UNIPHIER_MIO_RESET_USB2(9, 1),
147 UNIPHIER_MIO_RESET_USB2(10, 2),
148 UNIPHIER_MIO_RESET_USB2_BRIDGE(12, 0),
149 UNIPHIER_MIO_RESET_USB2_BRIDGE(13, 1),
150 UNIPHIER_MIO_RESET_USB2_BRIDGE(14, 2),
154 static const struct uniphier_reset_data uniphier_pro5_sd_reset_data
[] = {
155 UNIPHIER_MIO_RESET_SD(0, 0),
156 UNIPHIER_MIO_RESET_SD(1, 1),
157 UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1),
161 /* Peripheral reset data */
162 #define UNIPHIER_PERI_RESET_UART(id, ch) \
163 UNIPHIER_RESETX((id), 0x114, 19 + (ch))
165 #define UNIPHIER_PERI_RESET_I2C(id, ch) \
166 UNIPHIER_RESETX((id), 0x114, 5 + (ch))
168 #define UNIPHIER_PERI_RESET_FI2C(id, ch) \
169 UNIPHIER_RESETX((id), 0x114, 24 + (ch))
171 static const struct uniphier_reset_data uniphier_ld4_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_I2C(4, 0),
177 UNIPHIER_PERI_RESET_I2C(5, 1),
178 UNIPHIER_PERI_RESET_I2C(6, 2),
179 UNIPHIER_PERI_RESET_I2C(7, 3),
180 UNIPHIER_PERI_RESET_I2C(8, 4),
184 static const struct uniphier_reset_data uniphier_pro4_peri_reset_data
[] = {
185 UNIPHIER_PERI_RESET_UART(0, 0),
186 UNIPHIER_PERI_RESET_UART(1, 1),
187 UNIPHIER_PERI_RESET_UART(2, 2),
188 UNIPHIER_PERI_RESET_UART(3, 3),
189 UNIPHIER_PERI_RESET_FI2C(4, 0),
190 UNIPHIER_PERI_RESET_FI2C(5, 1),
191 UNIPHIER_PERI_RESET_FI2C(6, 2),
192 UNIPHIER_PERI_RESET_FI2C(7, 3),
193 UNIPHIER_PERI_RESET_FI2C(8, 4),
194 UNIPHIER_PERI_RESET_FI2C(9, 5),
195 UNIPHIER_PERI_RESET_FI2C(10, 6),
199 /* Analog signal amplifiers reset data */
200 static const struct uniphier_reset_data uniphier_ld11_adamv_reset_data
[] = {
201 UNIPHIER_RESETX(0, 0x10, 6), /* EVEA */
205 /* core implementaton */
206 struct uniphier_reset_priv
{
207 struct reset_controller_dev rcdev
;
209 struct regmap
*regmap
;
210 const struct uniphier_reset_data
*data
;
213 #define to_uniphier_reset_priv(_rcdev) \
214 container_of(_rcdev, struct uniphier_reset_priv, rcdev)
216 static int uniphier_reset_update(struct reset_controller_dev
*rcdev
,
217 unsigned long id
, int assert)
219 struct uniphier_reset_priv
*priv
= to_uniphier_reset_priv(rcdev
);
220 const struct uniphier_reset_data
*p
;
222 for (p
= priv
->data
; p
->id
!= UNIPHIER_RESET_ID_END
; p
++) {
223 unsigned int mask
, val
;
235 if (p
->flags
& UNIPHIER_RESET_ACTIVE_LOW
)
238 return regmap_write_bits(priv
->regmap
, p
->reg
, mask
, val
);
241 dev_err(priv
->dev
, "reset_id=%lu was not handled\n", id
);
245 static int uniphier_reset_assert(struct reset_controller_dev
*rcdev
,
248 return uniphier_reset_update(rcdev
, id
, 1);
251 static int uniphier_reset_deassert(struct reset_controller_dev
*rcdev
,
254 return uniphier_reset_update(rcdev
, id
, 0);
257 static int uniphier_reset_status(struct reset_controller_dev
*rcdev
,
260 struct uniphier_reset_priv
*priv
= to_uniphier_reset_priv(rcdev
);
261 const struct uniphier_reset_data
*p
;
263 for (p
= priv
->data
; p
->id
!= UNIPHIER_RESET_ID_END
; p
++) {
270 ret
= regmap_read(priv
->regmap
, p
->reg
, &val
);
274 asserted
= !!(val
& BIT(p
->bit
));
276 if (p
->flags
& UNIPHIER_RESET_ACTIVE_LOW
)
277 asserted
= !asserted
;
282 dev_err(priv
->dev
, "reset_id=%lu was not found\n", id
);
286 static const struct reset_control_ops uniphier_reset_ops
= {
287 .assert = uniphier_reset_assert
,
288 .deassert
= uniphier_reset_deassert
,
289 .status
= uniphier_reset_status
,
292 static int uniphier_reset_probe(struct platform_device
*pdev
)
294 struct device
*dev
= &pdev
->dev
;
295 struct uniphier_reset_priv
*priv
;
296 const struct uniphier_reset_data
*p
, *data
;
297 struct regmap
*regmap
;
298 struct device_node
*parent
;
299 unsigned int nr_resets
= 0;
301 data
= of_device_get_match_data(dev
);
305 parent
= of_get_parent(dev
->of_node
); /* parent should be syscon node */
306 regmap
= syscon_node_to_regmap(parent
);
308 if (IS_ERR(regmap
)) {
309 dev_err(dev
, "failed to get regmap (error %ld)\n",
311 return PTR_ERR(regmap
);
314 priv
= devm_kzalloc(dev
, sizeof(*priv
), GFP_KERNEL
);
318 for (p
= data
; p
->id
!= UNIPHIER_RESET_ID_END
; p
++)
319 nr_resets
= max(nr_resets
, p
->id
+ 1);
321 priv
->rcdev
.ops
= &uniphier_reset_ops
;
322 priv
->rcdev
.owner
= dev
->driver
->owner
;
323 priv
->rcdev
.of_node
= dev
->of_node
;
324 priv
->rcdev
.nr_resets
= nr_resets
;
326 priv
->regmap
= regmap
;
329 return devm_reset_controller_register(&pdev
->dev
, &priv
->rcdev
);
332 static const struct of_device_id uniphier_reset_match
[] = {
335 .compatible
= "socionext,uniphier-ld4-reset",
336 .data
= uniphier_ld4_sys_reset_data
,
339 .compatible
= "socionext,uniphier-pro4-reset",
340 .data
= uniphier_pro4_sys_reset_data
,
343 .compatible
= "socionext,uniphier-sld8-reset",
344 .data
= uniphier_ld4_sys_reset_data
,
347 .compatible
= "socionext,uniphier-pro5-reset",
348 .data
= uniphier_pro5_sys_reset_data
,
351 .compatible
= "socionext,uniphier-pxs2-reset",
352 .data
= uniphier_pxs2_sys_reset_data
,
355 .compatible
= "socionext,uniphier-ld11-reset",
356 .data
= uniphier_ld11_sys_reset_data
,
359 .compatible
= "socionext,uniphier-ld20-reset",
360 .data
= uniphier_ld20_sys_reset_data
,
362 /* Media I/O reset, SD reset */
364 .compatible
= "socionext,uniphier-ld4-mio-reset",
365 .data
= uniphier_ld4_mio_reset_data
,
368 .compatible
= "socionext,uniphier-pro4-mio-reset",
369 .data
= uniphier_ld4_mio_reset_data
,
372 .compatible
= "socionext,uniphier-sld8-mio-reset",
373 .data
= uniphier_ld4_mio_reset_data
,
376 .compatible
= "socionext,uniphier-pro5-sd-reset",
377 .data
= uniphier_pro5_sd_reset_data
,
380 .compatible
= "socionext,uniphier-pxs2-sd-reset",
381 .data
= uniphier_pro5_sd_reset_data
,
384 .compatible
= "socionext,uniphier-ld11-mio-reset",
385 .data
= uniphier_ld4_mio_reset_data
,
388 .compatible
= "socionext,uniphier-ld11-sd-reset",
389 .data
= uniphier_pro5_sd_reset_data
,
392 .compatible
= "socionext,uniphier-ld20-sd-reset",
393 .data
= uniphier_pro5_sd_reset_data
,
395 /* Peripheral reset */
397 .compatible
= "socionext,uniphier-ld4-peri-reset",
398 .data
= uniphier_ld4_peri_reset_data
,
401 .compatible
= "socionext,uniphier-pro4-peri-reset",
402 .data
= uniphier_pro4_peri_reset_data
,
405 .compatible
= "socionext,uniphier-sld8-peri-reset",
406 .data
= uniphier_ld4_peri_reset_data
,
409 .compatible
= "socionext,uniphier-pro5-peri-reset",
410 .data
= uniphier_pro4_peri_reset_data
,
413 .compatible
= "socionext,uniphier-pxs2-peri-reset",
414 .data
= uniphier_pro4_peri_reset_data
,
417 .compatible
= "socionext,uniphier-ld11-peri-reset",
418 .data
= uniphier_pro4_peri_reset_data
,
421 .compatible
= "socionext,uniphier-ld20-peri-reset",
422 .data
= uniphier_pro4_peri_reset_data
,
424 /* Analog signal amplifiers reset */
426 .compatible
= "socionext,uniphier-ld11-adamv-reset",
427 .data
= uniphier_ld11_adamv_reset_data
,
430 .compatible
= "socionext,uniphier-ld20-adamv-reset",
431 .data
= uniphier_ld11_adamv_reset_data
,
435 MODULE_DEVICE_TABLE(of
, uniphier_reset_match
);
437 static struct platform_driver uniphier_reset_driver
= {
438 .probe
= uniphier_reset_probe
,
440 .name
= "uniphier-reset",
441 .of_match_table
= uniphier_reset_match
,
444 module_platform_driver(uniphier_reset_driver
);
446 MODULE_AUTHOR("Masahiro Yamada <yamada.masahiro@socionext.com>");
447 MODULE_DESCRIPTION("UniPhier Reset Controller Driver");
448 MODULE_LICENSE("GPL");