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/stih416-resets.h> 17 18#include "reset-syscfg.h" 19 20/* 21 * STiH416 Peripheral powerdown definitions. 22 */ 23static const char stih416_front[] = "st,stih416-front-syscfg"; 24static const char stih416_rear[] = "st,stih416-rear-syscfg"; 25static const char stih416_sbc[] = "st,stih416-sbc-syscfg"; 26static const char stih416_lpm[] = "st,stih416-lpm-syscfg"; 27static const char stih416_cpu[] = "st,stih416-cpu-syscfg"; 28 29#define STIH416_PDN_FRONT(_bit) \ 30 _SYSCFG_RST_CH(stih416_front, SYSCFG_1500, _bit, SYSSTAT_1578, _bit) 31 32#define STIH416_PDN_REAR(_cntl, _stat) \ 33 _SYSCFG_RST_CH(stih416_rear, SYSCFG_2525, _cntl, SYSSTAT_2583, _stat) 34 35#define SYSCFG_1500 0x7d0 /* Powerdown request EMI/NAND/Keyscan */ 36#define SYSSTAT_1578 0x908 /* Powerdown status EMI/NAND/Keyscan */ 37 38#define SYSCFG_2525 0x834 /* Powerdown request USB/SATA/PCIe */ 39#define SYSSTAT_2583 0x91c /* Powerdown status USB/SATA/PCIe */ 40 41#define SYSCFG_2552 0x8A0 /* Reset Generator control 0 */ 42#define SYSCFG_1539 0x86c /* Softreset Ethernet 0 */ 43#define SYSCFG_510 0x7f8 /* Softreset Ethernet 1 */ 44#define LPM_SYSCFG_1 0x4 /* Softreset IRB */ 45#define SYSCFG_2553 0x8a4 /* Softreset SATA0/1, PCIE0/1 */ 46#define SYSCFG_7563 0x8cc /* MPE softresets 0 */ 47#define SYSCFG_7564 0x8d0 /* MPE softresets 1 */ 48 49#define STIH416_SRST_CPU(_reg, _bit) \ 50 _SYSCFG_RST_CH_NO_ACK(stih416_cpu, _reg, _bit) 51 52#define STIH416_SRST_FRONT(_reg, _bit) \ 53 _SYSCFG_RST_CH_NO_ACK(stih416_front, _reg, _bit) 54 55#define STIH416_SRST_REAR(_reg, _bit) \ 56 _SYSCFG_RST_CH_NO_ACK(stih416_rear, _reg, _bit) 57 58#define STIH416_SRST_LPM(_reg, _bit) \ 59 _SYSCFG_RST_CH_NO_ACK(stih416_lpm, _reg, _bit) 60 61#define STIH416_SRST_SBC(_reg, _bit) \ 62 _SYSCFG_RST_CH_NO_ACK(stih416_sbc, _reg, _bit) 63 64static const struct syscfg_reset_channel_data stih416_powerdowns[] = { 65 [STIH416_EMISS_POWERDOWN] = STIH416_PDN_FRONT(0), 66 [STIH416_NAND_POWERDOWN] = STIH416_PDN_FRONT(1), 67 [STIH416_KEYSCAN_POWERDOWN] = STIH416_PDN_FRONT(2), 68 [STIH416_USB0_POWERDOWN] = STIH416_PDN_REAR(0, 0), 69 [STIH416_USB1_POWERDOWN] = STIH416_PDN_REAR(1, 1), 70 [STIH416_USB2_POWERDOWN] = STIH416_PDN_REAR(2, 2), 71 [STIH416_USB3_POWERDOWN] = STIH416_PDN_REAR(6, 5), 72 [STIH416_SATA0_POWERDOWN] = STIH416_PDN_REAR(3, 3), 73 [STIH416_SATA1_POWERDOWN] = STIH416_PDN_REAR(4, 4), 74 [STIH416_PCIE0_POWERDOWN] = STIH416_PDN_REAR(7, 9), 75 [STIH416_PCIE1_POWERDOWN] = STIH416_PDN_REAR(5, 8), 76}; 77 78static const struct syscfg_reset_channel_data stih416_softresets[] = { 79 [STIH416_ETH0_SOFTRESET] = STIH416_SRST_FRONT(SYSCFG_1539, 0), 80 [STIH416_ETH1_SOFTRESET] = STIH416_SRST_SBC(SYSCFG_510, 0), 81 [STIH416_IRB_SOFTRESET] = STIH416_SRST_LPM(LPM_SYSCFG_1, 6), 82 [STIH416_USB0_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 9), 83 [STIH416_USB1_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 10), 84 [STIH416_USB2_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 11), 85 [STIH416_USB3_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 28), 86 [STIH416_SATA0_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 7), 87 [STIH416_SATA1_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 3), 88 [STIH416_PCIE0_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 15), 89 [STIH416_PCIE1_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 2), 90 [STIH416_AUD_DAC_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 14), 91 [STIH416_HDTVOUT_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 5), 92 [STIH416_VTAC_M_RX_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 25), 93 [STIH416_VTAC_A_RX_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 26), 94 [STIH416_SYNC_HD_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 5), 95 [STIH416_SYNC_SD_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 6), 96 [STIH416_BLITTER_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 10), 97 [STIH416_GPU_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 11), 98 [STIH416_VTAC_M_TX_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 18), 99 [STIH416_VTAC_A_TX_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 19), 100 [STIH416_VTG_AUX_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 21), 101 [STIH416_JPEG_DEC_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 23), 102 [STIH416_HVA_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 2), 103 [STIH416_COMPO_M_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 3), 104 [STIH416_COMPO_A_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 4), 105 [STIH416_VP8_DEC_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 10), 106 [STIH416_VTG_MAIN_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 16), 107 [STIH416_KEYSCAN_SOFTRESET] = STIH416_SRST_LPM(LPM_SYSCFG_1, 8), 108}; 109 110static struct syscfg_reset_controller_data stih416_powerdown_controller = { 111 .wait_for_ack = true, 112 .nr_channels = ARRAY_SIZE(stih416_powerdowns), 113 .channels = stih416_powerdowns, 114}; 115 116static struct syscfg_reset_controller_data stih416_softreset_controller = { 117 .wait_for_ack = false, 118 .active_low = true, 119 .nr_channels = ARRAY_SIZE(stih416_softresets), 120 .channels = stih416_softresets, 121}; 122 123static struct of_device_id stih416_reset_match[] = { 124 { .compatible = "st,stih416-powerdown", 125 .data = &stih416_powerdown_controller, }, 126 { .compatible = "st,stih416-softreset", 127 .data = &stih416_softreset_controller, }, 128 {}, 129}; 130 131static struct platform_driver stih416_reset_driver = { 132 .probe = syscfg_reset_probe, 133 .driver = { 134 .name = "reset-stih416", 135 .of_match_table = stih416_reset_match, 136 }, 137}; 138 139static int __init stih416_reset_init(void) 140{ 141 return platform_driver_register(&stih416_reset_driver); 142} 143arch_initcall(stih416_reset_init); 144