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OpenCloudOS-Kernel/drivers/reset/sti/reset-stih407.c

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reset: stih407: Add softreset, powerdown and picophy controllers This patch adds softreset, powerdown and picophy reset controllers for the STiH407 SoC. With this patch three new devices are registered: - 1. st,stih407-powerdown 2. st,stih407-softreset 3. st,stih407-picophyreset All three devices use system configuration registers mapped via regmap to perform the reset or powerdown. The powerdown controller also has an acknowledgement. A separate picophy reset controller manages the different reset channels within the picophy, which have a different polarity to the other system softresets. Managing these different picophy softreset channels is necessary to correctly handle resuming from suspend when USB2 devices are plugged into the USB3 port. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
2014-07-02 22:08:46 +08:00
/*
* Copyright (C) 2014 STMicroelectronics (R&D) Limited
* Author: Giuseppe Cavallaro <peppe.cavallaro@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/stih407-resets.h>
#include "reset-syscfg.h"
/* STiH407 Peripheral powerdown definitions. */
static const char stih407_core[] = "st,stih407-core-syscfg";
static const char stih407_sbc_reg[] = "st,stih407-sbc-reg-syscfg";
static const char stih407_lpm[] = "st,stih407-lpm-syscfg";
#define STIH407_PDN_0(_bit) \
_SYSCFG_RST_CH(stih407_core, SYSCFG_5000, _bit, SYSSTAT_5500, _bit)
#define STIH407_PDN_1(_bit) \
_SYSCFG_RST_CH(stih407_core, SYSCFG_5001, _bit, SYSSTAT_5501, _bit)
#define STIH407_PDN_ETH(_bit, _stat) \
_SYSCFG_RST_CH(stih407_sbc_reg, SYSCFG_4032, _bit, SYSSTAT_4520, _stat)
/* Powerdown requests control 0 */
#define SYSCFG_5000 0x0
#define SYSSTAT_5500 0x7d0
/* Powerdown requests control 1 (High Speed Links) */
#define SYSCFG_5001 0x4
#define SYSSTAT_5501 0x7d4
/* Ethernet powerdown/status/reset */
#define SYSCFG_4032 0x80
#define SYSSTAT_4520 0x820
#define SYSCFG_4002 0x8
static const struct syscfg_reset_channel_data stih407_powerdowns[] = {
[STIH407_EMISS_POWERDOWN] = STIH407_PDN_0(1),
[STIH407_NAND_POWERDOWN] = STIH407_PDN_0(0),
[STIH407_USB3_POWERDOWN] = STIH407_PDN_1(6),
[STIH407_USB2_PORT1_POWERDOWN] = STIH407_PDN_1(5),
[STIH407_USB2_PORT0_POWERDOWN] = STIH407_PDN_1(4),
[STIH407_PCIE1_POWERDOWN] = STIH407_PDN_1(3),
[STIH407_PCIE0_POWERDOWN] = STIH407_PDN_1(2),
[STIH407_SATA1_POWERDOWN] = STIH407_PDN_1(1),
[STIH407_SATA0_POWERDOWN] = STIH407_PDN_1(0),
[STIH407_ETH1_POWERDOWN] = STIH407_PDN_ETH(0, 2),
};
/* Reset Generator control 0/1 */
#define SYSCFG_5131 0x20c
#define SYSCFG_5132 0x210
#define LPM_SYSCFG_1 0x4 /* Softreset IRB & SBC UART */
#define STIH407_SRST_CORE(_reg, _bit) \
_SYSCFG_RST_CH_NO_ACK(stih407_core, _reg, _bit)
#define STIH407_SRST_SBC(_reg, _bit) \
_SYSCFG_RST_CH_NO_ACK(stih407_sbc_reg, _reg, _bit)
#define STIH407_SRST_LPM(_reg, _bit) \
_SYSCFG_RST_CH_NO_ACK(stih407_lpm, _reg, _bit)
static const struct syscfg_reset_channel_data stih407_softresets[] = {
[STIH407_ETH1_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 4),
[STIH407_MMC1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 3),
[STIH407_USB2_PORT0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 28),
[STIH407_USB2_PORT1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 29),
[STIH407_PICOPHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 30),
[STIH407_IRB_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 6),
[STIH407_PCIE0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 6),
[STIH407_PCIE1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 15),
[STIH407_SATA0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 7),
[STIH407_SATA1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 16),
[STIH407_MIPHY0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 4),
[STIH407_MIPHY1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 13),
[STIH407_MIPHY2_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 22),
[STIH407_SATA0_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 5),
[STIH407_SATA1_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 14),
[STIH407_DELTA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 3),
[STIH407_BLITTER_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 10),
[STIH407_HDTVOUT_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 11),
[STIH407_HDQVDP_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 12),
[STIH407_VDP_AUX_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 14),
[STIH407_COMPO_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 15),
[STIH407_HDMI_TX_PHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 21),
[STIH407_JPEG_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 23),
[STIH407_VP8_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 24),
[STIH407_GPU_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 30),
[STIH407_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 0),
[STIH407_ERAM_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 1),
[STIH407_LPM_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 2),
[STIH407_KEYSCAN_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 8),
};
/* PicoPHY reset/control */
#define SYSCFG_5061 0x0f4
static const struct syscfg_reset_channel_data stih407_picophyresets[] = {
[STIH407_PICOPHY0_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 5),
[STIH407_PICOPHY1_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 6),
[STIH407_PICOPHY2_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 7),
};
static const struct syscfg_reset_controller_data stih407_powerdown_controller = {
.wait_for_ack = true,
.nr_channels = ARRAY_SIZE(stih407_powerdowns),
.channels = stih407_powerdowns,
};
static const struct syscfg_reset_controller_data stih407_softreset_controller = {
.wait_for_ack = false,
.active_low = true,
.nr_channels = ARRAY_SIZE(stih407_softresets),
.channels = stih407_softresets,
};
static const struct syscfg_reset_controller_data stih407_picophyreset_controller = {
.wait_for_ack = false,
.nr_channels = ARRAY_SIZE(stih407_picophyresets),
.channels = stih407_picophyresets,
};
static struct of_device_id stih407_reset_match[] = {
{
.compatible = "st,stih407-powerdown",
.data = &stih407_powerdown_controller,
},
{
.compatible = "st,stih407-softreset",
.data = &stih407_softreset_controller,
},
{
.compatible = "st,stih407-picophyreset",
.data = &stih407_picophyreset_controller,
},
{ /* sentinel */ },
};
static struct platform_driver stih407_reset_driver = {
.probe = syscfg_reset_probe,
.driver = {
.name = "reset-stih407",
.of_match_table = stih407_reset_match,
},
};
static int __init stih407_reset_init(void)
{
return platform_driver_register(&stih407_reset_driver);
}
arch_initcall(stih407_reset_init);