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 */
23 static const char stih416_front[] = "st,stih416-front-syscfg";
24 static const char stih416_rear[] = "st,stih416-rear-syscfg";
25 static const char stih416_sbc[] = "st,stih416-sbc-syscfg";
26 static const char stih416_lpm[] = "st,stih416-lpm-syscfg";
27 static 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
64 static 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
78 static 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
110 static 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
116 static 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
123 static 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
131 static 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
stih416_reset_init(void)139 static int __init stih416_reset_init(void)
140 {
141 return platform_driver_register(&stih416_reset_driver);
142 }
143 arch_initcall(stih416_reset_init);
144