diff options
Diffstat (limited to 'arch/mips/ralink/rt3883.c')
| -rw-r--r-- | arch/mips/ralink/rt3883.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/arch/mips/ralink/rt3883.c b/arch/mips/ralink/rt3883.c new file mode 100644 index 000000000000..b474ac284b83 --- /dev/null +++ b/arch/mips/ralink/rt3883.c @@ -0,0 +1,246 @@ +/* + * 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; +} |