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.
6 * Parts of this file are based on Ralink's 2.6.21 BSP
8 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
9 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
10 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/module.h>
17 #include <asm/mipsregs.h>
18 #include <asm/mach-ralink/ralink_regs.h>
19 #include <asm/mach-ralink/mt7620.h>
23 /* does the board have sdram or ddram */
26 /* the pll dividers */
27 static u32 mt7620_clk_divider[] = { 2, 3, 4, 8 };
29 static struct ralink_pinmux_grp mode_mux[] = {
32 .mask = MT7620_GPIO_MODE_I2C,
37 .mask = MT7620_GPIO_MODE_SPI,
42 .mask = MT7620_GPIO_MODE_UART1,
47 .mask = MT7620_GPIO_MODE_WDT,
52 .mask = MT7620_GPIO_MODE_MDIO,
57 .mask = MT7620_GPIO_MODE_RGMII1,
62 .mask = MT7620_GPIO_MODE_SPI_REF_CLK,
67 .mask = MT7620_GPIO_MODE_JTAG,
71 /* shared lines with jtag */
73 .mask = MT7620_GPIO_MODE_EPHY,
78 .mask = MT7620_GPIO_MODE_JTAG,
83 .mask = MT7620_GPIO_MODE_RGMII2,
88 .mask = MT7620_GPIO_MODE_WLED,
94 static struct ralink_pinmux_grp uart_mux[] = {
97 .mask = MT7620_GPIO_MODE_UARTF,
102 .mask = MT7620_GPIO_MODE_PCM_UARTF,
107 .mask = MT7620_GPIO_MODE_PCM_I2S,
112 .mask = MT7620_GPIO_MODE_I2S_UARTF,
117 .mask = MT7620_GPIO_MODE_PCM_GPIO,
121 .name = "gpio uartf",
122 .mask = MT7620_GPIO_MODE_GPIO_UARTF,
127 .mask = MT7620_GPIO_MODE_GPIO_I2S,
132 .mask = MT7620_GPIO_MODE_GPIO,
136 struct ralink_pinmux rt_gpio_pinmux = {
139 .uart_shift = MT7620_GPIO_MODE_UART0_SHIFT,
140 .uart_mask = MT7620_GPIO_MODE_UART0_MASK,
143 void __init ralink_clk_init(void)
145 unsigned long cpu_rate, sys_rate;
146 u32 c0 = rt_sysc_r32(SYSC_REG_CPLL_CONFIG0);
147 u32 c1 = rt_sysc_r32(SYSC_REG_CPLL_CONFIG1);
148 u32 swconfig = (c0 >> CPLL_SW_CONFIG_SHIFT) & CPLL_SW_CONFIG_MASK;
149 u32 cpu_clk = (c1 >> CPLL_CPU_CLK_SHIFT) & CPLL_CPU_CLK_MASK;
152 cpu_rate = 480000000;
153 } else if (!swconfig) {
154 cpu_rate = 600000000;
156 u32 m = (c0 >> CPLL_MULT_RATIO_SHIFT) & CPLL_MULT_RATIO;
157 u32 d = (c0 >> CPLL_DIV_RATIO_SHIFT) & CPLL_DIV_RATIO;
159 cpu_rate = ((40 * (m + 24)) / mt7620_clk_divider[d]) * 1000000;
162 if (dram_type == SYSCFG0_DRAM_TYPE_SDRAM)
163 sys_rate = cpu_rate / 4;
165 sys_rate = cpu_rate / 3;
167 ralink_clk_add("cpu", cpu_rate);
168 ralink_clk_add("10000100.timer", 40000000);
169 ralink_clk_add("10000500.uart", 40000000);
170 ralink_clk_add("10000c00.uartlite", 40000000);
173 void __init ralink_of_remap(void)
175 rt_sysc_membase = plat_of_remap_node("ralink,mt7620a-sysc");
176 rt_memc_membase = plat_of_remap_node("ralink,mt7620a-memc");
178 if (!rt_sysc_membase || !rt_memc_membase)
179 panic("Failed to remap core resources");
182 void prom_soc_init(struct ralink_soc_info *soc_info)
184 void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7620_SYSC_BASE);
185 unsigned char *name = NULL;
191 n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
192 n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
194 if (n0 == MT7620N_CHIP_NAME0 && n1 == MT7620N_CHIP_NAME1) {
196 soc_info->compatible = "ralink,mt7620n-soc";
197 } else if (n0 == MT7620A_CHIP_NAME0 && n1 == MT7620A_CHIP_NAME1) {
199 soc_info->compatible = "ralink,mt7620a-soc";
201 panic("mt7620: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
204 rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
206 snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
207 "Ralink %s ver:%u eco:%u",
209 (rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
210 (rev & CHIP_REV_ECO_MASK));
212 cfg0 = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG0);
213 dram_type = (cfg0 >> SYSCFG0_DRAM_TYPE_SHIFT) & SYSCFG0_DRAM_TYPE_MASK;
216 case SYSCFG0_DRAM_TYPE_SDRAM:
217 soc_info->mem_size_min = MT7620_SDRAM_SIZE_MIN;
218 soc_info->mem_size_max = MT7620_SDRAM_SIZE_MAX;
221 case SYSCFG0_DRAM_TYPE_DDR1:
222 soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN;
223 soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX;
226 case SYSCFG0_DRAM_TYPE_DDR2:
227 soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN;
228 soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX;
233 soc_info->mem_base = MT7620_DRAM_BASE;