- 根目录:
- arch
- mips
- ralink
- rt3883.c
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* Parts of this file are based on Ralink's 2.6.21 BSP
*
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
* Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <asm/mipsregs.h>
#include <asm/mach-ralink/ralink_regs.h>
#include <asm/mach-ralink/rt3883.h>
#include "common.h"
static struct ralink_pinmux_grp mode_mux[] = {
{
.name = "i2c",
.mask = RT3883_GPIO_MODE_I2C,
.gpio_first = RT3883_GPIO_I2C_SD,
.gpio_last = RT3883_GPIO_I2C_SCLK,
}, {
.name = "spi",
.mask = RT3883_GPIO_MODE_SPI,
.gpio_first = RT3883_GPIO_SPI_CS0,
.gpio_last = RT3883_GPIO_SPI_MISO,
}, {
.name = "uartlite",
.mask = RT3883_GPIO_MODE_UART1,
.gpio_first = RT3883_GPIO_UART1_TXD,
.gpio_last = RT3883_GPIO_UART1_RXD,
}, {
.name = "jtag",
.mask = RT3883_GPIO_MODE_JTAG,
.gpio_first = RT3883_GPIO_JTAG_TDO,
.gpio_last = RT3883_GPIO_JTAG_TCLK,
}, {
.name = "mdio",
.mask = RT3883_GPIO_MODE_MDIO,
.gpio_first = RT3883_GPIO_MDIO_MDC,
.gpio_last = RT3883_GPIO_MDIO_MDIO,
}, {
.name = "ge1",
.mask = RT3883_GPIO_MODE_GE1,
.gpio_first = RT3883_GPIO_GE1_TXD0,
.gpio_last = RT3883_GPIO_GE1_RXCLK,
}, {
.name = "ge2",
.mask = RT3883_GPIO_MODE_GE2,
.gpio_first = RT3883_GPIO_GE2_TXD0,
.gpio_last = RT3883_GPIO_GE2_RXCLK,
}, {
.name = "pci",
.mask = RT3883_GPIO_MODE_PCI,
.gpio_first = RT3883_GPIO_PCI_AD0,
.gpio_last = RT3883_GPIO_PCI_AD31,
}, {
.name = "lna a",
.mask = RT3883_GPIO_MODE_LNA_A,
.gpio_first = RT3883_GPIO_LNA_PE_A0,
.gpio_last = RT3883_GPIO_LNA_PE_A2,
}, {
.name = "lna g",
.mask = RT3883_GPIO_MODE_LNA_G,
.gpio_first = RT3883_GPIO_LNA_PE_G0,
.gpio_last = RT3883_GPIO_LNA_PE_G2,
}, {0}
};
static struct ralink_pinmux_grp uart_mux[] = {
{
.name = "uartf",
.mask = RT3883_GPIO_MODE_UARTF,
.gpio_first = RT3883_GPIO_7,
.gpio_last = RT3883_GPIO_14,
}, {
.name = "pcm uartf",
.mask = RT3883_GPIO_MODE_PCM_UARTF,
.gpio_first = RT3883_GPIO_7,
.gpio_last = RT3883_GPIO_14,
}, {
.name = "pcm i2s",
.mask = RT3883_GPIO_MODE_PCM_I2S,
.gpio_first = RT3883_GPIO_7,
.gpio_last = RT3883_GPIO_14,
}, {
.name = "i2s uartf",
.mask = RT3883_GPIO_MODE_I2S_UARTF,
.gpio_first = RT3883_GPIO_7,
.gpio_last = RT3883_GPIO_14,
}, {
.name = "pcm gpio",
.mask = RT3883_GPIO_MODE_PCM_GPIO,
.gpio_first = RT3883_GPIO_11,
.gpio_last = RT3883_GPIO_14,
}, {
.name = "gpio uartf",
.mask = RT3883_GPIO_MODE_GPIO_UARTF,
.gpio_first = RT3883_GPIO_7,
.gpio_last = RT3883_GPIO_10,
}, {
.name = "gpio i2s",
.mask = RT3883_GPIO_MODE_GPIO_I2S,
.gpio_first = RT3883_GPIO_7,
.gpio_last = RT3883_GPIO_10,
}, {
.name = "gpio",
.mask = RT3883_GPIO_MODE_GPIO,
}, {0}
};
static struct ralink_pinmux_grp pci_mux[] = {
{
.name = "pci-dev",
.mask = 0,
.gpio_first = RT3883_GPIO_PCI_AD0,
.gpio_last = RT3883_GPIO_PCI_AD31,
}, {
.name = "pci-host2",
.mask = 1,
.gpio_first = RT3883_GPIO_PCI_AD0,
.gpio_last = RT3883_GPIO_PCI_AD31,
}, {
.name = "pci-host1",
.mask = 2,
.gpio_first = RT3883_GPIO_PCI_AD0,
.gpio_last = RT3883_GPIO_PCI_AD31,
}, {
.name = "pci-fnc",
.mask = 3,
.gpio_first = RT3883_GPIO_PCI_AD0,
.gpio_last = RT3883_GPIO_PCI_AD31,
}, {
.name = "pci-gpio",
.mask = 7,
.gpio_first = RT3883_GPIO_PCI_AD0,
.gpio_last = RT3883_GPIO_PCI_AD31,
}, {0}
};
static void rt3883_wdt_reset(void)
{
u32 t;
/* enable WDT reset output on GPIO 2 */
t = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG1);
t |= RT3883_SYSCFG1_GPIO2_AS_WDT_OUT;
rt_sysc_w32(t, RT3883_SYSC_REG_SYSCFG1);
}
struct ralink_pinmux rt_gpio_pinmux = {
.mode = mode_mux,
.uart = uart_mux,
.uart_shift = RT3883_GPIO_MODE_UART0_SHIFT,
.uart_mask = RT3883_GPIO_MODE_UART0_MASK,
.wdt_reset = rt3883_wdt_reset,
.pci = pci_mux,
.pci_shift = RT3883_GPIO_MODE_PCI_SHIFT,
.pci_mask = RT3883_GPIO_MODE_PCI_MASK,
};
void __init ralink_clk_init(void)
{
unsigned long cpu_rate, sys_rate;
u32 syscfg0;
u32 clksel;
u32 ddr2;
syscfg0 = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG0);
clksel = ((syscfg0 >> RT3883_SYSCFG0_CPUCLK_SHIFT) &
RT3883_SYSCFG0_CPUCLK_MASK);
ddr2 = syscfg0 & RT3883_SYSCFG0_DRAM_TYPE_DDR2;
switch (clksel) {
case RT3883_SYSCFG0_CPUCLK_250:
cpu_rate = 250000000;
sys_rate = (ddr2) ? 125000000 : 83000000;
break;
case RT3883_SYSCFG0_CPUCLK_384:
cpu_rate = 384000000;
sys_rate = (ddr2) ? 128000000 : 96000000;
break;
case RT3883_SYSCFG0_CPUCLK_480:
cpu_rate = 480000000;
sys_rate = (ddr2) ? 160000000 : 120000000;
break;
case RT3883_SYSCFG0_CPUCLK_500:
cpu_rate = 500000000;
sys_rate = (ddr2) ? 166000000 : 125000000;
break;
}
ralink_clk_add("cpu", cpu_rate);
ralink_clk_add("10000100.timer", sys_rate);
ralink_clk_add("10000120.watchdog", sys_rate);
ralink_clk_add("10000500.uart", 40000000);
ralink_clk_add("10000b00.spi", sys_rate);
ralink_clk_add("10000c00.uartlite", 40000000);
ralink_clk_add("10100000.ethernet", sys_rate);
}
void __init ralink_of_remap(void)
{
rt_sysc_membase = plat_of_remap_node("ralink,rt3883-sysc");
rt_memc_membase = plat_of_remap_node("ralink,rt3883-memc");
if (!rt_sysc_membase || !rt_memc_membase)
panic("Failed to remap core resources");
}
void prom_soc_init(struct ralink_soc_info *soc_info)
{
void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT3883_SYSC_BASE);
const char *name;
u32 n0;
u32 n1;
u32 id;
n0 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID0_3);
n1 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID4_7);
id = __raw_readl(sysc + RT3883_SYSC_REG_REVID);
if (n0 == RT3883_CHIP_NAME0 && n1 == RT3883_CHIP_NAME1) {
soc_info->compatible = "ralink,rt3883-soc";
name = "RT3883";
} else {
panic("rt3883: unknown SoC, n0:%08x n1:%08x", n0, n1);
}
snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
"Ralink %s ver:%u eco:%u",
name,
(id >> RT3883_REVID_VER_ID_SHIFT) & RT3883_REVID_VER_ID_MASK,
(id & RT3883_REVID_ECO_ID_MASK));
soc_info->mem_base = RT3883_SDRAM_BASE;
soc_info->mem_size_min = RT3883_MEM_SIZE_MIN;
soc_info->mem_size_max = RT3883_MEM_SIZE_MAX;
}