mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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e9de663517
This patch adds softreset controller for STiH416 SOC, soft reset controller is based on system configuration registers which are mapped via regmap. This reset controller does not have any feedback or acknowledgement. With this patch a new device "st,stih416-softreset" is registered with system configuration registers based reset controller that controls the softreset state of the hardware such as Ethernet, IRB. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
144 lines
5.7 KiB
C
144 lines
5.7 KiB
C
/*
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* Copyright (C) 2013 STMicroelectronics (R&D) Limited
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* Author: Stephen Gallimore <stephen.gallimore@st.com>
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* Author: Srinivas Kandagatla <srinivas.kandagatla@st.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <dt-bindings/reset-controller/stih416-resets.h>
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#include "reset-syscfg.h"
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/*
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* STiH416 Peripheral powerdown definitions.
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*/
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static const char stih416_front[] = "st,stih416-front-syscfg";
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static const char stih416_rear[] = "st,stih416-rear-syscfg";
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static const char stih416_sbc[] = "st,stih416-sbc-syscfg";
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static const char stih416_lpm[] = "st,stih416-lpm-syscfg";
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static const char stih416_cpu[] = "st,stih416-cpu-syscfg";
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#define STIH416_PDN_FRONT(_bit) \
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_SYSCFG_RST_CH(stih416_front, SYSCFG_1500, _bit, SYSSTAT_1578, _bit)
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#define STIH416_PDN_REAR(_cntl, _stat) \
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_SYSCFG_RST_CH(stih416_rear, SYSCFG_2525, _cntl, SYSSTAT_2583, _stat)
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#define SYSCFG_1500 0x7d0 /* Powerdown request EMI/NAND/Keyscan */
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#define SYSSTAT_1578 0x908 /* Powerdown status EMI/NAND/Keyscan */
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#define SYSCFG_2525 0x834 /* Powerdown request USB/SATA/PCIe */
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#define SYSSTAT_2583 0x91c /* Powerdown status USB/SATA/PCIe */
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#define SYSCFG_2552 0x8A0 /* Reset Generator control 0 */
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#define SYSCFG_1539 0x86c /* Softreset Ethernet 0 */
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#define SYSCFG_510 0x7f8 /* Softreset Ethernet 1 */
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#define LPM_SYSCFG_1 0x4 /* Softreset IRB */
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#define SYSCFG_2553 0x8a4 /* Softreset SATA0/1, PCIE0/1 */
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#define SYSCFG_7563 0x8cc /* MPE softresets 0 */
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#define SYSCFG_7564 0x8d0 /* MPE softresets 1 */
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#define STIH416_SRST_CPU(_reg, _bit) \
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_SYSCFG_RST_CH_NO_ACK(stih416_cpu, _reg, _bit)
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#define STIH416_SRST_FRONT(_reg, _bit) \
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_SYSCFG_RST_CH_NO_ACK(stih416_front, _reg, _bit)
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#define STIH416_SRST_REAR(_reg, _bit) \
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_SYSCFG_RST_CH_NO_ACK(stih416_rear, _reg, _bit)
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#define STIH416_SRST_LPM(_reg, _bit) \
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_SYSCFG_RST_CH_NO_ACK(stih416_lpm, _reg, _bit)
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#define STIH416_SRST_SBC(_reg, _bit) \
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_SYSCFG_RST_CH_NO_ACK(stih416_sbc, _reg, _bit)
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static const struct syscfg_reset_channel_data stih416_powerdowns[] = {
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[STIH416_EMISS_POWERDOWN] = STIH416_PDN_FRONT(0),
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[STIH416_NAND_POWERDOWN] = STIH416_PDN_FRONT(1),
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[STIH416_KEYSCAN_POWERDOWN] = STIH416_PDN_FRONT(2),
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[STIH416_USB0_POWERDOWN] = STIH416_PDN_REAR(0, 0),
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[STIH416_USB1_POWERDOWN] = STIH416_PDN_REAR(1, 1),
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[STIH416_USB2_POWERDOWN] = STIH416_PDN_REAR(2, 2),
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[STIH416_USB3_POWERDOWN] = STIH416_PDN_REAR(6, 5),
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[STIH416_SATA0_POWERDOWN] = STIH416_PDN_REAR(3, 3),
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[STIH416_SATA1_POWERDOWN] = STIH416_PDN_REAR(4, 4),
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[STIH416_PCIE0_POWERDOWN] = STIH416_PDN_REAR(7, 9),
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[STIH416_PCIE1_POWERDOWN] = STIH416_PDN_REAR(5, 8),
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};
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static const struct syscfg_reset_channel_data stih416_softresets[] = {
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[STIH416_ETH0_SOFTRESET] = STIH416_SRST_FRONT(SYSCFG_1539, 0),
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[STIH416_ETH1_SOFTRESET] = STIH416_SRST_SBC(SYSCFG_510, 0),
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[STIH416_IRB_SOFTRESET] = STIH416_SRST_LPM(LPM_SYSCFG_1, 6),
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[STIH416_USB0_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 9),
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[STIH416_USB1_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 10),
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[STIH416_USB2_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 11),
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[STIH416_USB3_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 28),
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[STIH416_SATA0_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 7),
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[STIH416_SATA1_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 3),
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[STIH416_PCIE0_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 15),
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[STIH416_PCIE1_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 2),
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[STIH416_AUD_DAC_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 14),
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[STIH416_HDTVOUT_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 5),
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[STIH416_VTAC_M_RX_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 25),
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[STIH416_VTAC_A_RX_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 26),
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[STIH416_SYNC_HD_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 5),
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[STIH416_SYNC_SD_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 6),
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[STIH416_BLITTER_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 10),
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[STIH416_GPU_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 11),
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[STIH416_VTAC_M_TX_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 18),
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[STIH416_VTAC_A_TX_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 19),
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[STIH416_VTG_AUX_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 21),
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[STIH416_JPEG_DEC_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 23),
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[STIH416_HVA_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 2),
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[STIH416_COMPO_M_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 3),
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[STIH416_COMPO_A_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 4),
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[STIH416_VP8_DEC_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 10),
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[STIH416_VTG_MAIN_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 16),
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};
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static struct syscfg_reset_controller_data stih416_powerdown_controller = {
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.wait_for_ack = true,
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.nr_channels = ARRAY_SIZE(stih416_powerdowns),
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.channels = stih416_powerdowns,
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};
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static struct syscfg_reset_controller_data stih416_softreset_controller = {
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.wait_for_ack = false,
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.active_low = true,
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.nr_channels = ARRAY_SIZE(stih416_softresets),
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.channels = stih416_softresets,
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};
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static struct of_device_id stih416_reset_match[] = {
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{ .compatible = "st,stih416-powerdown",
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.data = &stih416_powerdown_controller, },
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{ .compatible = "st,stih416-softreset",
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.data = &stih416_softreset_controller, },
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{},
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};
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static struct platform_driver stih416_reset_driver = {
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.probe = syscfg_reset_probe,
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.driver = {
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.name = "reset-stih416",
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.owner = THIS_MODULE,
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.of_match_table = stih416_reset_match,
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},
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};
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static int __init stih416_reset_init(void)
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{
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return platform_driver_register(&stih416_reset_driver);
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}
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arch_initcall(stih416_reset_init);
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