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MIPS: ralink: add memory definition for RT305x

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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/
This commit is contained in:
John Crispin 2013-04-13 15:13:40 +02:00 committed by Ralf Baechle
parent 629e39eec8
commit dafecee8bb
2 changed files with 51 additions and 0 deletions
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6
arch/mips/include/asm/mach-ralink/rt305x.h
View File

@ -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

45
arch/mips/ralink/rt305x.c
View File

@ -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;
}
}