1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2014 STMicroelectronics (R&D) Limited
4 * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
5 */
6 #include <linux/module.h>
7 #include <linux/of.h>
8 #include <linux/of_platform.h>
9 #include <linux/platform_device.h>
10 #include <dt-bindings/reset/stih407-resets.h>
11 #include "reset-syscfg.h"
12
13 /* STiH407 Peripheral powerdown definitions. */
14 static const char stih407_core[] = "st,stih407-core-syscfg";
15 static const char stih407_sbc_reg[] = "st,stih407-sbc-reg-syscfg";
16 static const char stih407_lpm[] = "st,stih407-lpm-syscfg";
17
18 #define STIH407_PDN_0(_bit) \
19 _SYSCFG_RST_CH(stih407_core, SYSCFG_5000, _bit, SYSSTAT_5500, _bit)
20 #define STIH407_PDN_1(_bit) \
21 _SYSCFG_RST_CH(stih407_core, SYSCFG_5001, _bit, SYSSTAT_5501, _bit)
22 #define STIH407_PDN_ETH(_bit, _stat) \
23 _SYSCFG_RST_CH(stih407_sbc_reg, SYSCFG_4032, _bit, SYSSTAT_4520, _stat)
24
25 /* Powerdown requests control 0 */
26 #define SYSCFG_5000 0x0
27 #define SYSSTAT_5500 0x7d0
28 /* Powerdown requests control 1 (High Speed Links) */
29 #define SYSCFG_5001 0x4
30 #define SYSSTAT_5501 0x7d4
31
32 /* Ethernet powerdown/status/reset */
33 #define SYSCFG_4032 0x80
34 #define SYSSTAT_4520 0x820
35 #define SYSCFG_4002 0x8
36
37 static const struct syscfg_reset_channel_data stih407_powerdowns[] = {
38 [STIH407_EMISS_POWERDOWN] = STIH407_PDN_0(1),
39 [STIH407_NAND_POWERDOWN] = STIH407_PDN_0(0),
40 [STIH407_USB3_POWERDOWN] = STIH407_PDN_1(6),
41 [STIH407_USB2_PORT1_POWERDOWN] = STIH407_PDN_1(5),
42 [STIH407_USB2_PORT0_POWERDOWN] = STIH407_PDN_1(4),
43 [STIH407_PCIE1_POWERDOWN] = STIH407_PDN_1(3),
44 [STIH407_PCIE0_POWERDOWN] = STIH407_PDN_1(2),
45 [STIH407_SATA1_POWERDOWN] = STIH407_PDN_1(1),
46 [STIH407_SATA0_POWERDOWN] = STIH407_PDN_1(0),
47 [STIH407_ETH1_POWERDOWN] = STIH407_PDN_ETH(0, 2),
48 };
49
50 /* Reset Generator control 0/1 */
51 #define SYSCFG_5128 0x200
52 #define SYSCFG_5131 0x20c
53 #define SYSCFG_5132 0x210
54
55 #define LPM_SYSCFG_1 0x4 /* Softreset IRB & SBC UART */
56
57 #define STIH407_SRST_CORE(_reg, _bit) \
58 _SYSCFG_RST_CH_NO_ACK(stih407_core, _reg, _bit)
59
60 #define STIH407_SRST_SBC(_reg, _bit) \
61 _SYSCFG_RST_CH_NO_ACK(stih407_sbc_reg, _reg, _bit)
62
63 #define STIH407_SRST_LPM(_reg, _bit) \
64 _SYSCFG_RST_CH_NO_ACK(stih407_lpm, _reg, _bit)
65
66 static const struct syscfg_reset_channel_data stih407_softresets[] = {
67 [STIH407_ETH1_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 4),
68 [STIH407_MMC1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 3),
69 [STIH407_USB2_PORT0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 28),
70 [STIH407_USB2_PORT1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 29),
71 [STIH407_PICOPHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 30),
72 [STIH407_IRB_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 6),
73 [STIH407_PCIE0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 6),
74 [STIH407_PCIE1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 15),
75 [STIH407_SATA0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 7),
76 [STIH407_SATA1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 16),
77 [STIH407_MIPHY0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 4),
78 [STIH407_MIPHY1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 13),
79 [STIH407_MIPHY2_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 22),
80 [STIH407_SATA0_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 5),
81 [STIH407_SATA1_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 14),
82 [STIH407_DELTA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 3),
83 [STIH407_BLITTER_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 10),
84 [STIH407_HDTVOUT_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 11),
85 [STIH407_HDQVDP_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 12),
86 [STIH407_VDP_AUX_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 14),
87 [STIH407_COMPO_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 15),
88 [STIH407_HDMI_TX_PHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 21),
89 [STIH407_JPEG_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 23),
90 [STIH407_VP8_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 24),
91 [STIH407_GPU_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 30),
92 [STIH407_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 0),
93 [STIH407_ERAM_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 1),
94 [STIH407_LPM_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 2),
95 [STIH407_KEYSCAN_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 8),
96 [STIH407_ST231_AUD_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 26),
97 [STIH407_ST231_DMU_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 27),
98 [STIH407_ST231_GP0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 28),
99 [STIH407_ST231_GP1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5128, 2),
100 };
101
102 /* PicoPHY reset/control */
103 #define SYSCFG_5061 0x0f4
104
105 static const struct syscfg_reset_channel_data stih407_picophyresets[] = {
106 [STIH407_PICOPHY0_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 5),
107 [STIH407_PICOPHY1_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 6),
108 [STIH407_PICOPHY2_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 7),
109 };
110
111 static const struct syscfg_reset_controller_data stih407_powerdown_controller = {
112 .wait_for_ack = true,
113 .nr_channels = ARRAY_SIZE(stih407_powerdowns),
114 .channels = stih407_powerdowns,
115 };
116
117 static const struct syscfg_reset_controller_data stih407_softreset_controller = {
118 .wait_for_ack = false,
119 .active_low = true,
120 .nr_channels = ARRAY_SIZE(stih407_softresets),
121 .channels = stih407_softresets,
122 };
123
124 static const struct syscfg_reset_controller_data stih407_picophyreset_controller = {
125 .wait_for_ack = false,
126 .nr_channels = ARRAY_SIZE(stih407_picophyresets),
127 .channels = stih407_picophyresets,
128 };
129
130 static const struct of_device_id stih407_reset_match[] = {
131 {
132 .compatible = "st,stih407-powerdown",
133 .data = &stih407_powerdown_controller,
134 },
135 {
136 .compatible = "st,stih407-softreset",
137 .data = &stih407_softreset_controller,
138 },
139 {
140 .compatible = "st,stih407-picophyreset",
141 .data = &stih407_picophyreset_controller,
142 },
143 { /* sentinel */ },
144 };
145
146 static struct platform_driver stih407_reset_driver = {
147 .probe = syscfg_reset_probe,
148 .driver = {
149 .name = "reset-stih407",
150 .of_match_table = stih407_reset_match,
151 },
152 };
153
stih407_reset_init(void)154 static int __init stih407_reset_init(void)
155 {
156 return platform_driver_register(&stih407_reset_driver);
157 }
158
159 arch_initcall(stih407_reset_init);
160