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- /*
- * 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;
- }
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