diff options
Diffstat (limited to 'arch/mips/ralink/rt288x.c')
| -rw-r--r-- | arch/mips/ralink/rt288x.c | 169 |
1 files changed, 68 insertions, 101 deletions
diff --git a/arch/mips/ralink/rt288x.c b/arch/mips/ralink/rt288x.c index f87de1ab2198..ce8b5b6025bb 100644 --- a/arch/mips/ralink/rt288x.c +++ b/arch/mips/ralink/rt288x.c @@ -1,18 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0-only /* - * 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) 2008-2011 Gabor Juhos <juhosg@openwrt.org> * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> - * Copyright (C) 2013 John Crispin <blogic@openwrt.org> + * Copyright (C) 2013 John Crispin <john@phrozen.org> */ #include <linux/kernel.h> #include <linux/init.h> -#include <linux/module.h> +#include <linux/slab.h> +#include <linux/sys_soc.h> #include <asm/mipsregs.h> #include <asm/mach-ralink/ralink_regs.h> @@ -20,124 +19,92 @@ #include "common.h" -static struct ralink_pinmux_grp mode_mux[] = { - { - .name = "i2c", - .mask = RT2880_GPIO_MODE_I2C, - .gpio_first = 1, - .gpio_last = 2, - }, { - .name = "spi", - .mask = RT2880_GPIO_MODE_SPI, - .gpio_first = 3, - .gpio_last = 6, - }, { - .name = "uartlite", - .mask = RT2880_GPIO_MODE_UART0, - .gpio_first = 7, - .gpio_last = 14, - }, { - .name = "jtag", - .mask = RT2880_GPIO_MODE_JTAG, - .gpio_first = 17, - .gpio_last = 21, - }, { - .name = "mdio", - .mask = RT2880_GPIO_MODE_MDIO, - .gpio_first = 22, - .gpio_last = 23, - }, { - .name = "sdram", - .mask = RT2880_GPIO_MODE_SDRAM, - .gpio_first = 24, - .gpio_last = 39, - }, { - .name = "pci", - .mask = RT2880_GPIO_MODE_PCI, - .gpio_first = 40, - .gpio_last = 71, - }, {0} -}; - -static void rt288x_wdt_reset(void) +static struct ralink_soc_info *soc_info_ptr; + +static unsigned int __init rt2880_get_soc_name0(void) { - u32 t; + return __raw_readl(RT2880_SYSC_BASE + SYSC_REG_CHIP_NAME0); +} - /* enable WDT reset output on pin SRAM_CS_N */ - t = rt_sysc_r32(SYSC_REG_CLKCFG); - t |= CLKCFG_SRAM_CS_N_WDT; - rt_sysc_w32(t, SYSC_REG_CLKCFG); +static unsigned int __init rt2880_get_soc_name1(void) +{ + return __raw_readl(RT2880_SYSC_BASE + SYSC_REG_CHIP_NAME1); } -struct ralink_pinmux rt_gpio_pinmux = { - .mode = mode_mux, - .wdt_reset = rt288x_wdt_reset, -}; +static bool __init rt2880_soc_valid(void) +{ + if (rt2880_get_soc_name0() == RT2880_CHIP_NAME0 && + rt2880_get_soc_name1() == RT2880_CHIP_NAME1) + return true; + else + return false; +} -void __init ralink_clk_init(void) +static const char __init *rt2880_get_soc_name(void) { - unsigned long cpu_rate; - u32 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG); - t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK); - - switch (t) { - case SYSTEM_CONFIG_CPUCLK_250: - cpu_rate = 250000000; - break; - case SYSTEM_CONFIG_CPUCLK_266: - cpu_rate = 266666667; - break; - case SYSTEM_CONFIG_CPUCLK_280: - cpu_rate = 280000000; - break; - case SYSTEM_CONFIG_CPUCLK_300: - cpu_rate = 300000000; - break; - } + if (rt2880_soc_valid()) + return "RT2880"; + else + return "invalid"; +} - ralink_clk_add("cpu", cpu_rate); - ralink_clk_add("300100.timer", cpu_rate / 2); - ralink_clk_add("300120.watchdog", cpu_rate / 2); - ralink_clk_add("300500.uart", cpu_rate / 2); - ralink_clk_add("300c00.uartlite", cpu_rate / 2); - ralink_clk_add("400000.ethernet", cpu_rate / 2); +static unsigned int __init rt2880_get_soc_id(void) +{ + return __raw_readl(RT2880_SYSC_BASE + SYSC_REG_CHIP_ID); } -void __init ralink_of_remap(void) +static unsigned int __init rt2880_get_soc_ver(void) { - rt_sysc_membase = plat_of_remap_node("ralink,rt2880-sysc"); - rt_memc_membase = plat_of_remap_node("ralink,rt2880-memc"); + return (rt2880_get_soc_id() >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK; +} - if (!rt_sysc_membase || !rt_memc_membase) - panic("Failed to remap core resources"); +static unsigned int __init rt2880_get_soc_rev(void) +{ + return (rt2880_get_soc_id() & CHIP_ID_REV_MASK); } -void prom_soc_init(struct ralink_soc_info *soc_info) +static int __init rt2880_soc_dev_init(void) { - void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT2880_SYSC_BASE); - const char *name; - u32 n0; - u32 n1; - u32 id; + struct soc_device *soc_dev; + struct soc_device_attribute *soc_dev_attr; - n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0); - n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1); - id = __raw_readl(sysc + SYSC_REG_CHIP_ID); + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) + return -ENOMEM; - if (n0 == RT2880_CHIP_NAME0 && n1 == RT2880_CHIP_NAME1) { - soc_info->compatible = "ralink,r2880-soc"; - name = "RT2880"; - } else { - panic("rt288x: unknown SoC, n0:%08x n1:%08x", n0, n1); + soc_dev_attr->family = "Ralink"; + soc_dev_attr->soc_id = rt2880_get_soc_name(); + + soc_dev_attr->data = soc_info_ptr; + + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR(soc_dev)) { + kfree(soc_dev_attr); + return PTR_ERR(soc_dev); } + return 0; +} +device_initcall(rt2880_soc_dev_init); + +void __init prom_soc_init(struct ralink_soc_info *soc_info) +{ + if (rt2880_soc_valid()) + soc_info->compatible = "ralink,r2880-soc"; + else + panic("rt288x: unknown SoC, n0:%08x n1:%08x", + rt2880_get_soc_name0(), rt2880_get_soc_name1()); + snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN, "Ralink %s id:%u rev:%u", - name, - (id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK, - (id & CHIP_ID_REV_MASK)); + rt2880_get_soc_name(), + rt2880_get_soc_ver(), + rt2880_get_soc_rev()); soc_info->mem_base = RT2880_SDRAM_BASE; soc_info->mem_size_min = RT2880_MEM_SIZE_MIN; soc_info->mem_size_max = RT2880_MEM_SIZE_MAX; + + ralink_soc = RT2880_SOC; + soc_info_ptr = soc_info; } |