[linux-2.6-block.git] / drivers / reset / sti / reset-stih415.c

/*
 * Copyright (C) 2013 STMicroelectronics (R&D) Limited
 * Author: Stephen Gallimore <stephen.gallimore@st.com>
 * Author: Srinivas Kandagatla <srinivas.kandagatla@st.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>

#include <dt-bindings/reset-controller/stih415-resets.h>

#include "reset-syscfg.h"

/*
 * STiH415 Peripheral powerdown definitions.
 */
static const char stih415_front[] = "st,stih415-front-syscfg";
static const char stih415_rear[] = "st,stih415-rear-syscfg";
static const char stih415_sbc[] = "st,stih415-sbc-syscfg";
static const char stih415_lpm[] = "st,stih415-lpm-syscfg";

#define STIH415_PDN_FRONT(_bit) \
	_SYSCFG_RST_CH(stih415_front, SYSCFG_114, _bit, SYSSTAT_187, _bit)

#define STIH415_PDN_REAR(_cntl, _stat) \
	_SYSCFG_RST_CH(stih415_rear, SYSCFG_336, _cntl, SYSSTAT_384, _stat)

#define STIH415_SRST_REAR(_reg, _bit) \
	_SYSCFG_RST_CH_NO_ACK(stih415_rear, _reg, _bit)

#define STIH415_SRST_SBC(_reg, _bit) \
	_SYSCFG_RST_CH_NO_ACK(stih415_sbc, _reg, _bit)

#define STIH415_SRST_FRONT(_reg, _bit) \
	_SYSCFG_RST_CH_NO_ACK(stih415_front, _reg, _bit)

#define STIH415_SRST_LPM(_reg, _bit) \
	_SYSCFG_RST_CH_NO_ACK(stih415_lpm, _reg, _bit)

#define SYSCFG_114	0x38 /* Powerdown request EMI/NAND/Keyscan */
#define SYSSTAT_187	0x15c /* Powerdown status EMI/NAND/Keyscan */

#define SYSCFG_336	0x90 /* Powerdown request USB/SATA/PCIe */
#define SYSSTAT_384	0x150 /* Powerdown status USB/SATA/PCIe */

#define SYSCFG_376	0x130 /* Reset generator 0 control 0 */
#define SYSCFG_166	0x108 /* Softreset Ethernet 0 */
#define SYSCFG_31	0x7c /* Softreset Ethernet 1 */
#define LPM_SYSCFG_1	0x4 /* Softreset IRB */

static const struct syscfg_reset_channel_data stih415_powerdowns[] = {
	[STIH415_EMISS_POWERDOWN]	= STIH415_PDN_FRONT(0),
	[STIH415_NAND_POWERDOWN]	= STIH415_PDN_FRONT(1),
	[STIH415_KEYSCAN_POWERDOWN]	= STIH415_PDN_FRONT(2),
	[STIH415_USB0_POWERDOWN]	= STIH415_PDN_REAR(0, 0),
	[STIH415_USB1_POWERDOWN]	= STIH415_PDN_REAR(1, 1),
	[STIH415_USB2_POWERDOWN]	= STIH415_PDN_REAR(2, 2),
	[STIH415_SATA0_POWERDOWN]	= STIH415_PDN_REAR(3, 3),
	[STIH415_SATA1_POWERDOWN]	= STIH415_PDN_REAR(4, 4),
	[STIH415_PCIE_POWERDOWN]	= STIH415_PDN_REAR(5, 8),
};

static const struct syscfg_reset_channel_data stih415_softresets[] = {
	[STIH415_ETH0_SOFTRESET] = STIH415_SRST_FRONT(SYSCFG_166, 0),
	[STIH415_ETH1_SOFTRESET] = STIH415_SRST_SBC(SYSCFG_31, 0),
	[STIH415_IRB_SOFTRESET]	 = STIH415_SRST_LPM(LPM_SYSCFG_1, 6),
	[STIH415_USB0_SOFTRESET] = STIH415_SRST_REAR(SYSCFG_376, 9),
	[STIH415_USB1_SOFTRESET] = STIH415_SRST_REAR(SYSCFG_376, 10),
	[STIH415_USB2_SOFTRESET] = STIH415_SRST_REAR(SYSCFG_376, 11),
	[STIH415_KEYSCAN_SOFTRESET] = STIH415_SRST_LPM(LPM_SYSCFG_1, 8),
};

static struct syscfg_reset_controller_data stih415_powerdown_controller = {
	.wait_for_ack = true,
	.nr_channels = ARRAY_SIZE(stih415_powerdowns),
	.channels = stih415_powerdowns,
};

static struct syscfg_reset_controller_data stih415_softreset_controller = {
	.wait_for_ack = false,
	.active_low = true,
	.nr_channels = ARRAY_SIZE(stih415_softresets),
	.channels = stih415_softresets,
};

static struct of_device_id stih415_reset_match[] = {
	{ .compatible = "st,stih415-powerdown",
	  .data = &stih415_powerdown_controller, },
	{ .compatible = "st,stih415-softreset",
	  .data = &stih415_softreset_controller, },
	{},
};

static struct platform_driver stih415_reset_driver = {
	.probe = syscfg_reset_probe,
	.driver = {
		.name = "reset-stih415",
		.owner = THIS_MODULE,
		.of_match_table = stih415_reset_match,
	},
};

static int __init stih415_reset_init(void)
{
	return platform_driver_register(&stih415_reset_driver);
}
arch_initcall(stih415_reset_init);
Commit	Line	Data
1f42c290 SG	1	/*
	2	* Copyright (C) 2013 STMicroelectronics (R&D) Limited
	3	* Author: Stephen Gallimore <stephen.gallimore@st.com>
	4	* Author: Srinivas Kandagatla <srinivas.kandagatla@st.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11	#include <linux/module.h>
	12	#include <linux/of.h>
	13	#include <linux/of_platform.h>
	14	#include <linux/platform_device.h>
	15
	16	#include <dt-bindings/reset-controller/stih415-resets.h>
	17
	18	#include "reset-syscfg.h"
	19
	20	/*
	21	* STiH415 Peripheral powerdown definitions.
	22	*/
	23	static const char stih415_front[] = "st,stih415-front-syscfg";
	24	static const char stih415_rear[] = "st,stih415-rear-syscfg";
	25	static const char stih415_sbc[] = "st,stih415-sbc-syscfg";
	26	static const char stih415_lpm[] = "st,stih415-lpm-syscfg";
	27
	28	#define STIH415_PDN_FRONT(_bit) \
	29	_SYSCFG_RST_CH(stih415_front, SYSCFG_114, _bit, SYSSTAT_187, _bit)
	30
	31	#define STIH415_PDN_REAR(_cntl, _stat) \
	32	_SYSCFG_RST_CH(stih415_rear, SYSCFG_336, _cntl, SYSSTAT_384, _stat)
	33
a596ebd3 SK	34	#define STIH415_SRST_REAR(_reg, _bit) \
	35	_SYSCFG_RST_CH_NO_ACK(stih415_rear, _reg, _bit)
	36
	37	#define STIH415_SRST_SBC(_reg, _bit) \
	38	_SYSCFG_RST_CH_NO_ACK(stih415_sbc, _reg, _bit)
	39
	40	#define STIH415_SRST_FRONT(_reg, _bit) \
	41	_SYSCFG_RST_CH_NO_ACK(stih415_front, _reg, _bit)
	42
	43	#define STIH415_SRST_LPM(_reg, _bit) \
	44	_SYSCFG_RST_CH_NO_ACK(stih415_lpm, _reg, _bit)
	45
1f42c290 SG	46	#define SYSCFG_114 0x38 /* Powerdown request EMI/NAND/Keyscan */
	47	#define SYSSTAT_187 0x15c /* Powerdown status EMI/NAND/Keyscan */
	48
	49	#define SYSCFG_336 0x90 /* Powerdown request USB/SATA/PCIe */
	50	#define SYSSTAT_384 0x150 /* Powerdown status USB/SATA/PCIe */
	51
a596ebd3 SK	52	#define SYSCFG_376 0x130 /* Reset generator 0 control 0 */
	53	#define SYSCFG_166 0x108 /* Softreset Ethernet 0 */
	54	#define SYSCFG_31 0x7c /* Softreset Ethernet 1 */
	55	#define LPM_SYSCFG_1 0x4 /* Softreset IRB */
	56
1f42c290 SG	57	static const struct syscfg_reset_channel_data stih415_powerdowns[] = {
	58	[STIH415_EMISS_POWERDOWN] = STIH415_PDN_FRONT(0),
	59	[STIH415_NAND_POWERDOWN] = STIH415_PDN_FRONT(1),
	60	[STIH415_KEYSCAN_POWERDOWN] = STIH415_PDN_FRONT(2),
	61	[STIH415_USB0_POWERDOWN] = STIH415_PDN_REAR(0, 0),
	62	[STIH415_USB1_POWERDOWN] = STIH415_PDN_REAR(1, 1),
	63	[STIH415_USB2_POWERDOWN] = STIH415_PDN_REAR(2, 2),
	64	[STIH415_SATA0_POWERDOWN] = STIH415_PDN_REAR(3, 3),
	65	[STIH415_SATA1_POWERDOWN] = STIH415_PDN_REAR(4, 4),
	66	[STIH415_PCIE_POWERDOWN] = STIH415_PDN_REAR(5, 8),
	67	};
	68
a596ebd3 SK	69	static const struct syscfg_reset_channel_data stih415_softresets[] = {
	70	[STIH415_ETH0_SOFTRESET] = STIH415_SRST_FRONT(SYSCFG_166, 0),
	71	[STIH415_ETH1_SOFTRESET] = STIH415_SRST_SBC(SYSCFG_31, 0),
	72	[STIH415_IRB_SOFTRESET] = STIH415_SRST_LPM(LPM_SYSCFG_1, 6),
	73	[STIH415_USB0_SOFTRESET] = STIH415_SRST_REAR(SYSCFG_376, 9),
	74	[STIH415_USB1_SOFTRESET] = STIH415_SRST_REAR(SYSCFG_376, 10),
	75	[STIH415_USB2_SOFTRESET] = STIH415_SRST_REAR(SYSCFG_376, 11),
ce73d9be	76	[STIH415_KEYSCAN_SOFTRESET] = STIH415_SRST_LPM(LPM_SYSCFG_1, 8),
a596ebd3 SK	77	};
a596ebd3 SK	78
1f42c290 SG	79	static struct syscfg_reset_controller_data stih415_powerdown_controller = {
	80	.wait_for_ack = true,
	81	.nr_channels = ARRAY_SIZE(stih415_powerdowns),
	82	.channels = stih415_powerdowns,
	83	};
	84
a596ebd3 SK	85	static struct syscfg_reset_controller_data stih415_softreset_controller = {
	86	.wait_for_ack = false,
	87	.active_low = true,
	88	.nr_channels = ARRAY_SIZE(stih415_softresets),
	89	.channels = stih415_softresets,
	90	};
	91
1f42c290 SG	92	static struct of_device_id stih415_reset_match[] = {
	93	{ .compatible = "st,stih415-powerdown",
	94	.data = &stih415_powerdown_controller, },
a596ebd3 SK	95	{ .compatible = "st,stih415-softreset",
a596ebd3 SK	96	.data = &stih415_softreset_controller, },
1f42c290 SG	97	{},
	98	};
	99
	100	static struct platform_driver stih415_reset_driver = {
	101	.probe = syscfg_reset_probe,
	102	.driver = {
	103	.name = "reset-stih415",
	104	.owner = THIS_MODULE,
	105	.of_match_table = stih415_reset_match,
	106	},
	107	};
	108
	109	static int __init stih415_reset_init(void)
	110	{
	111	return platform_driver_register(&stih415_reset_driver);
	112	}
	113	arch_initcall(stih415_reset_init);