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| author | John Crispin <blogic@openwrt.org> | 2013-04-13 15:13:40 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-05-08 01:19:11 +0200 |
| commit | dafecee8bb4e56af4d3a5f47b5982e6eff5d60b0 (patch) | |
| tree | 741d452edf7118dea5d57d7f50f3f3c8d7ed52d6 | |
| parent | MIPS: ralink: add memory definition to struct ralink_soc_info (diff) | |
| download | linux-dafecee8bb4e56af4d3a5f47b5982e6eff5d60b0.tar.xz linux-dafecee8bb4e56af4d3a5f47b5982e6eff5d60b0.zip | |
MIPS: ralink: add memory definition for RT305x
Populate struct soc_info with the data that describes our RAM window.
As memory detection fails on RT5350 we read the amount of available memory
from the system controller.
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5180/
| -rw-r--r-- | arch/mips/include/asm/mach-ralink/rt305x.h | 6 | ||||
| -rw-r--r-- | arch/mips/ralink/rt305x.c | 45 |
2 files changed, 51 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-ralink/rt305x.h b/arch/mips/include/asm/mach-ralink/rt305x.h index 80cda8af7ac9..069bf37a6010 100644 --- a/arch/mips/include/asm/mach-ralink/rt305x.h +++ b/arch/mips/include/asm/mach-ralink/rt305x.h @@ -157,4 +157,10 @@ static inline int soc_is_rt5350(void) #define RT3352_RSTCTRL_UDEV BIT(25) #define RT3352_SYSCFG1_USB0_HOST_MODE BIT(10) +#define RT305X_SDRAM_BASE 0x00000000 +#define RT305X_MEM_SIZE_MIN 2 +#define RT305X_MEM_SIZE_MAX 64 +#define RT3352_MEM_SIZE_MIN 2 +#define RT3352_MEM_SIZE_MAX 256 + #endif diff --git a/arch/mips/ralink/rt305x.c b/arch/mips/ralink/rt305x.c index 6aa3cb1a8fc5..ca7ee3a33790 100644 --- a/arch/mips/ralink/rt305x.c +++ b/arch/mips/ralink/rt305x.c @@ -122,6 +122,40 @@ struct ralink_pinmux rt_gpio_pinmux = { .wdt_reset = rt305x_wdt_reset, }; +static unsigned long rt5350_get_mem_size(void) +{ + void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE); + unsigned long ret; + u32 t; + + t = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG); + t = (t >> RT5350_SYSCFG0_DRAM_SIZE_SHIFT) & + RT5350_SYSCFG0_DRAM_SIZE_MASK; + + switch (t) { + case RT5350_SYSCFG0_DRAM_SIZE_2M: + ret = 2; + break; + case RT5350_SYSCFG0_DRAM_SIZE_8M: + ret = 8; + break; + case RT5350_SYSCFG0_DRAM_SIZE_16M: + ret = 16; + break; + case RT5350_SYSCFG0_DRAM_SIZE_32M: + ret = 32; + break; + case RT5350_SYSCFG0_DRAM_SIZE_64M: + ret = 64; + break; + default: + panic("rt5350: invalid DRAM size: %u", t); + break; + } + + return ret; +} + void __init ralink_clk_init(void) { unsigned long cpu_rate, sys_rate, wdt_rate, uart_rate; @@ -252,4 +286,15 @@ void prom_soc_init(struct ralink_soc_info *soc_info) name, (id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK, (id & CHIP_ID_REV_MASK)); + + soc_info->mem_base = RT305X_SDRAM_BASE; + if (soc_is_rt5350()) { + soc_info->mem_size = rt5350_get_mem_size(); + } else if (soc_is_rt305x() || soc_is_rt3350()) { + soc_info->mem_size_min = RT305X_MEM_SIZE_MIN; + soc_info->mem_size_max = RT305X_MEM_SIZE_MAX; + } else if (soc_is_rt3352()) { + soc_info->mem_size_min = RT3352_MEM_SIZE_MIN; + soc_info->mem_size_max = RT3352_MEM_SIZE_MAX; + } } |