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3ba92043 PG |
1 | /* |
2 | * Copyright (C) 2014 STMicroelectronics (R&D) Limited | |
3 | * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | */ | |
10 | #include <linux/module.h> | |
11 | #include <linux/of.h> | |
12 | #include <linux/of_platform.h> | |
13 | #include <linux/platform_device.h> | |
efdf5aa8 | 14 | #include <dt-bindings/reset/stih407-resets.h> |
3ba92043 PG |
15 | #include "reset-syscfg.h" |
16 | ||
17 | /* STiH407 Peripheral powerdown definitions. */ | |
18 | static const char stih407_core[] = "st,stih407-core-syscfg"; | |
19 | static const char stih407_sbc_reg[] = "st,stih407-sbc-reg-syscfg"; | |
20 | static const char stih407_lpm[] = "st,stih407-lpm-syscfg"; | |
21 | ||
22 | #define STIH407_PDN_0(_bit) \ | |
23 | _SYSCFG_RST_CH(stih407_core, SYSCFG_5000, _bit, SYSSTAT_5500, _bit) | |
24 | #define STIH407_PDN_1(_bit) \ | |
25 | _SYSCFG_RST_CH(stih407_core, SYSCFG_5001, _bit, SYSSTAT_5501, _bit) | |
26 | #define STIH407_PDN_ETH(_bit, _stat) \ | |
27 | _SYSCFG_RST_CH(stih407_sbc_reg, SYSCFG_4032, _bit, SYSSTAT_4520, _stat) | |
28 | ||
29 | /* Powerdown requests control 0 */ | |
30 | #define SYSCFG_5000 0x0 | |
31 | #define SYSSTAT_5500 0x7d0 | |
32 | /* Powerdown requests control 1 (High Speed Links) */ | |
33 | #define SYSCFG_5001 0x4 | |
34 | #define SYSSTAT_5501 0x7d4 | |
35 | ||
36 | /* Ethernet powerdown/status/reset */ | |
37 | #define SYSCFG_4032 0x80 | |
38 | #define SYSSTAT_4520 0x820 | |
39 | #define SYSCFG_4002 0x8 | |
40 | ||
41 | static const struct syscfg_reset_channel_data stih407_powerdowns[] = { | |
42 | [STIH407_EMISS_POWERDOWN] = STIH407_PDN_0(1), | |
43 | [STIH407_NAND_POWERDOWN] = STIH407_PDN_0(0), | |
44 | [STIH407_USB3_POWERDOWN] = STIH407_PDN_1(6), | |
45 | [STIH407_USB2_PORT1_POWERDOWN] = STIH407_PDN_1(5), | |
46 | [STIH407_USB2_PORT0_POWERDOWN] = STIH407_PDN_1(4), | |
47 | [STIH407_PCIE1_POWERDOWN] = STIH407_PDN_1(3), | |
48 | [STIH407_PCIE0_POWERDOWN] = STIH407_PDN_1(2), | |
49 | [STIH407_SATA1_POWERDOWN] = STIH407_PDN_1(1), | |
50 | [STIH407_SATA0_POWERDOWN] = STIH407_PDN_1(0), | |
51 | [STIH407_ETH1_POWERDOWN] = STIH407_PDN_ETH(0, 2), | |
52 | }; | |
53 | ||
54 | /* Reset Generator control 0/1 */ | |
55 | #define SYSCFG_5131 0x20c | |
56 | #define SYSCFG_5132 0x210 | |
57 | ||
58 | #define LPM_SYSCFG_1 0x4 /* Softreset IRB & SBC UART */ | |
59 | ||
60 | #define STIH407_SRST_CORE(_reg, _bit) \ | |
61 | _SYSCFG_RST_CH_NO_ACK(stih407_core, _reg, _bit) | |
62 | ||
63 | #define STIH407_SRST_SBC(_reg, _bit) \ | |
64 | _SYSCFG_RST_CH_NO_ACK(stih407_sbc_reg, _reg, _bit) | |
65 | ||
66 | #define STIH407_SRST_LPM(_reg, _bit) \ | |
67 | _SYSCFG_RST_CH_NO_ACK(stih407_lpm, _reg, _bit) | |
68 | ||
69 | static const struct syscfg_reset_channel_data stih407_softresets[] = { | |
70 | [STIH407_ETH1_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 4), | |
71 | [STIH407_MMC1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 3), | |
72 | [STIH407_USB2_PORT0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 28), | |
73 | [STIH407_USB2_PORT1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 29), | |
74 | [STIH407_PICOPHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 30), | |
75 | [STIH407_IRB_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 6), | |
76 | [STIH407_PCIE0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 6), | |
77 | [STIH407_PCIE1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 15), | |
78 | [STIH407_SATA0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 7), | |
79 | [STIH407_SATA1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 16), | |
80 | [STIH407_MIPHY0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 4), | |
81 | [STIH407_MIPHY1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 13), | |
82 | [STIH407_MIPHY2_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 22), | |
83 | [STIH407_SATA0_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 5), | |
84 | [STIH407_SATA1_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 14), | |
85 | [STIH407_DELTA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 3), | |
86 | [STIH407_BLITTER_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 10), | |
87 | [STIH407_HDTVOUT_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 11), | |
88 | [STIH407_HDQVDP_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 12), | |
89 | [STIH407_VDP_AUX_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 14), | |
90 | [STIH407_COMPO_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 15), | |
91 | [STIH407_HDMI_TX_PHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 21), | |
92 | [STIH407_JPEG_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 23), | |
93 | [STIH407_VP8_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 24), | |
94 | [STIH407_GPU_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 30), | |
95 | [STIH407_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 0), | |
96 | [STIH407_ERAM_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 1), | |
97 | [STIH407_LPM_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 2), | |
98 | [STIH407_KEYSCAN_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 8), | |
99 | }; | |
100 | ||
101 | /* PicoPHY reset/control */ | |
102 | #define SYSCFG_5061 0x0f4 | |
103 | ||
104 | static const struct syscfg_reset_channel_data stih407_picophyresets[] = { | |
105 | [STIH407_PICOPHY0_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 5), | |
106 | [STIH407_PICOPHY1_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 6), | |
107 | [STIH407_PICOPHY2_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 7), | |
108 | }; | |
109 | ||
110 | static const struct syscfg_reset_controller_data stih407_powerdown_controller = { | |
111 | .wait_for_ack = true, | |
112 | .nr_channels = ARRAY_SIZE(stih407_powerdowns), | |
113 | .channels = stih407_powerdowns, | |
114 | }; | |
115 | ||
116 | static const struct syscfg_reset_controller_data stih407_softreset_controller = { | |
117 | .wait_for_ack = false, | |
118 | .active_low = true, | |
119 | .nr_channels = ARRAY_SIZE(stih407_softresets), | |
120 | .channels = stih407_softresets, | |
121 | }; | |
122 | ||
123 | static const struct syscfg_reset_controller_data stih407_picophyreset_controller = { | |
124 | .wait_for_ack = false, | |
125 | .nr_channels = ARRAY_SIZE(stih407_picophyresets), | |
126 | .channels = stih407_picophyresets, | |
127 | }; | |
128 | ||
129 | static struct of_device_id stih407_reset_match[] = { | |
130 | { | |
131 | .compatible = "st,stih407-powerdown", | |
132 | .data = &stih407_powerdown_controller, | |
133 | }, | |
134 | { | |
135 | .compatible = "st,stih407-softreset", | |
136 | .data = &stih407_softreset_controller, | |
137 | }, | |
138 | { | |
139 | .compatible = "st,stih407-picophyreset", | |
140 | .data = &stih407_picophyreset_controller, | |
141 | }, | |
142 | { /* sentinel */ }, | |
143 | }; | |
144 | ||
145 | static struct platform_driver stih407_reset_driver = { | |
146 | .probe = syscfg_reset_probe, | |
147 | .driver = { | |
148 | .name = "reset-stih407", | |
149 | .of_match_table = stih407_reset_match, | |
150 | }, | |
151 | }; | |
152 | ||
153 | static int __init stih407_reset_init(void) | |
154 | { | |
155 | return platform_driver_register(&stih407_reset_driver); | |
156 | } | |
157 | ||
158 | arch_initcall(stih407_reset_init); |