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1/*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
5 *
6 * Parts of this file are based on Ralink's 2.6.21 BSP
7 *
8 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
9 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
10 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
11 */
12
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/module.h>
16
17#include <asm/mipsregs.h>
18#include <asm/mach-ralink/ralink_regs.h>
19#include <asm/mach-ralink/rt3883.h>
20
21#include "common.h"
22
23static struct ralink_pinmux_grp mode_mux[] = {
24 {
25 .name = "i2c",
26 .mask = RT3883_GPIO_MODE_I2C,
27 .gpio_first = RT3883_GPIO_I2C_SD,
28 .gpio_last = RT3883_GPIO_I2C_SCLK,
29 }, {
30 .name = "spi",
31 .mask = RT3883_GPIO_MODE_SPI,
32 .gpio_first = RT3883_GPIO_SPI_CS0,
33 .gpio_last = RT3883_GPIO_SPI_MISO,
34 }, {
35 .name = "uartlite",
36 .mask = RT3883_GPIO_MODE_UART1,
37 .gpio_first = RT3883_GPIO_UART1_TXD,
38 .gpio_last = RT3883_GPIO_UART1_RXD,
39 }, {
40 .name = "jtag",
41 .mask = RT3883_GPIO_MODE_JTAG,
42 .gpio_first = RT3883_GPIO_JTAG_TDO,
43 .gpio_last = RT3883_GPIO_JTAG_TCLK,
44 }, {
45 .name = "mdio",
46 .mask = RT3883_GPIO_MODE_MDIO,
47 .gpio_first = RT3883_GPIO_MDIO_MDC,
48 .gpio_last = RT3883_GPIO_MDIO_MDIO,
49 }, {
50 .name = "ge1",
51 .mask = RT3883_GPIO_MODE_GE1,
52 .gpio_first = RT3883_GPIO_GE1_TXD0,
53 .gpio_last = RT3883_GPIO_GE1_RXCLK,
54 }, {
55 .name = "ge2",
56 .mask = RT3883_GPIO_MODE_GE2,
57 .gpio_first = RT3883_GPIO_GE2_TXD0,
58 .gpio_last = RT3883_GPIO_GE2_RXCLK,
59 }, {
60 .name = "pci",
61 .mask = RT3883_GPIO_MODE_PCI,
62 .gpio_first = RT3883_GPIO_PCI_AD0,
63 .gpio_last = RT3883_GPIO_PCI_AD31,
64 }, {
65 .name = "lna a",
66 .mask = RT3883_GPIO_MODE_LNA_A,
67 .gpio_first = RT3883_GPIO_LNA_PE_A0,
68 .gpio_last = RT3883_GPIO_LNA_PE_A2,
69 }, {
70 .name = "lna g",
71 .mask = RT3883_GPIO_MODE_LNA_G,
72 .gpio_first = RT3883_GPIO_LNA_PE_G0,
73 .gpio_last = RT3883_GPIO_LNA_PE_G2,
74 }, {0}
75};
76
77static struct ralink_pinmux_grp uart_mux[] = {
78 {
79 .name = "uartf",
80 .mask = RT3883_GPIO_MODE_UARTF,
81 .gpio_first = RT3883_GPIO_7,
82 .gpio_last = RT3883_GPIO_14,
83 }, {
84 .name = "pcm uartf",
85 .mask = RT3883_GPIO_MODE_PCM_UARTF,
86 .gpio_first = RT3883_GPIO_7,
87 .gpio_last = RT3883_GPIO_14,
88 }, {
89 .name = "pcm i2s",
90 .mask = RT3883_GPIO_MODE_PCM_I2S,
91 .gpio_first = RT3883_GPIO_7,
92 .gpio_last = RT3883_GPIO_14,
93 }, {
94 .name = "i2s uartf",
95 .mask = RT3883_GPIO_MODE_I2S_UARTF,
96 .gpio_first = RT3883_GPIO_7,
97 .gpio_last = RT3883_GPIO_14,
98 }, {
99 .name = "pcm gpio",
100 .mask = RT3883_GPIO_MODE_PCM_GPIO,
101 .gpio_first = RT3883_GPIO_11,
102 .gpio_last = RT3883_GPIO_14,
103 }, {
104 .name = "gpio uartf",
105 .mask = RT3883_GPIO_MODE_GPIO_UARTF,
106 .gpio_first = RT3883_GPIO_7,
107 .gpio_last = RT3883_GPIO_10,
108 }, {
109 .name = "gpio i2s",
110 .mask = RT3883_GPIO_MODE_GPIO_I2S,
111 .gpio_first = RT3883_GPIO_7,
112 .gpio_last = RT3883_GPIO_10,
113 }, {
114 .name = "gpio",
115 .mask = RT3883_GPIO_MODE_GPIO,
116 }, {0}
117};
118
119static struct ralink_pinmux_grp pci_mux[] = {
120 {
121 .name = "pci-dev",
122 .mask = 0,
123 .gpio_first = RT3883_GPIO_PCI_AD0,
124 .gpio_last = RT3883_GPIO_PCI_AD31,
125 }, {
126 .name = "pci-host2",
127 .mask = 1,
128 .gpio_first = RT3883_GPIO_PCI_AD0,
129 .gpio_last = RT3883_GPIO_PCI_AD31,
130 }, {
131 .name = "pci-host1",
132 .mask = 2,
133 .gpio_first = RT3883_GPIO_PCI_AD0,
134 .gpio_last = RT3883_GPIO_PCI_AD31,
135 }, {
136 .name = "pci-fnc",
137 .mask = 3,
138 .gpio_first = RT3883_GPIO_PCI_AD0,
139 .gpio_last = RT3883_GPIO_PCI_AD31,
140 }, {
141 .name = "pci-gpio",
142 .mask = 7,
143 .gpio_first = RT3883_GPIO_PCI_AD0,
144 .gpio_last = RT3883_GPIO_PCI_AD31,
145 }, {0}
146};
147
148static void rt3883_wdt_reset(void)
149{
150 u32 t;
151
152 /* enable WDT reset output on GPIO 2 */
153 t = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG1);
154 t |= RT3883_SYSCFG1_GPIO2_AS_WDT_OUT;
155 rt_sysc_w32(t, RT3883_SYSC_REG_SYSCFG1);
156}
157
158struct ralink_pinmux rt_gpio_pinmux = {
159 .mode = mode_mux,
160 .uart = uart_mux,
161 .uart_shift = RT3883_GPIO_MODE_UART0_SHIFT,
162 .uart_mask = RT3883_GPIO_MODE_UART0_MASK,
163 .wdt_reset = rt3883_wdt_reset,
164 .pci = pci_mux,
165 .pci_shift = RT3883_GPIO_MODE_PCI_SHIFT,
166 .pci_mask = RT3883_GPIO_MODE_PCI_MASK,
167};
168
169void __init ralink_clk_init(void)
170{
171 unsigned long cpu_rate, sys_rate;
172 u32 syscfg0;
173 u32 clksel;
174 u32 ddr2;
175
176 syscfg0 = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG0);
177 clksel = ((syscfg0 >> RT3883_SYSCFG0_CPUCLK_SHIFT) &
178 RT3883_SYSCFG0_CPUCLK_MASK);
179 ddr2 = syscfg0 & RT3883_SYSCFG0_DRAM_TYPE_DDR2;
180
181 switch (clksel) {
182 case RT3883_SYSCFG0_CPUCLK_250:
183 cpu_rate = 250000000;
184 sys_rate = (ddr2) ? 125000000 : 83000000;
185 break;
186 case RT3883_SYSCFG0_CPUCLK_384:
187 cpu_rate = 384000000;
188 sys_rate = (ddr2) ? 128000000 : 96000000;
189 break;
190 case RT3883_SYSCFG0_CPUCLK_480:
191 cpu_rate = 480000000;
192 sys_rate = (ddr2) ? 160000000 : 120000000;
193 break;
194 case RT3883_SYSCFG0_CPUCLK_500:
195 cpu_rate = 500000000;
196 sys_rate = (ddr2) ? 166000000 : 125000000;
197 break;
198 }
199
200 ralink_clk_add("cpu", cpu_rate);
201 ralink_clk_add("10000100.timer", sys_rate);
202 ralink_clk_add("10000120.watchdog", sys_rate);
203 ralink_clk_add("10000500.uart", 40000000);
204 ralink_clk_add("10000b00.spi", sys_rate);
205 ralink_clk_add("10000c00.uartlite", 40000000);
206 ralink_clk_add("10100000.ethernet", sys_rate);
207}
208
209void __init ralink_of_remap(void)
210{
211 rt_sysc_membase = plat_of_remap_node("ralink,rt3883-sysc");
212 rt_memc_membase = plat_of_remap_node("ralink,rt3883-memc");
213
214 if (!rt_sysc_membase || !rt_memc_membase)
215 panic("Failed to remap core resources");
216}
217
218void prom_soc_init(struct ralink_soc_info *soc_info)
219{
220 void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT3883_SYSC_BASE);
221 const char *name;
222 u32 n0;
223 u32 n1;
224 u32 id;
225
226 n0 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID0_3);
227 n1 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID4_7);
228 id = __raw_readl(sysc + RT3883_SYSC_REG_REVID);
229
230 if (n0 == RT3883_CHIP_NAME0 && n1 == RT3883_CHIP_NAME1) {
231 soc_info->compatible = "ralink,rt3883-soc";
232 name = "RT3883";
233 } else {
234 panic("rt3883: unknown SoC, n0:%08x n1:%08x", n0, n1);
235 }
236
237 snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
238 "Ralink %s ver:%u eco:%u",
239 name,
240 (id >> RT3883_REVID_VER_ID_SHIFT) & RT3883_REVID_VER_ID_MASK,
241 (id & RT3883_REVID_ECO_ID_MASK));
242
243 soc_info->mem_base = RT3883_SDRAM_BASE;
244 soc_info->mem_size_min = RT3883_MEM_SIZE_MIN;
245 soc_info->mem_size_max = RT3883_MEM_SIZE_MAX;
246}