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linux_dsm_epyc7002/arch/mips/ralink/mt7620.c
Ralf Baechle f7777dcc75 MIPS: Panic messages should not end in \n. 
Panic() is going to add a \n itself and it's annoying if a panic message rolls
of the screen on a device with no scrollback.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-10-29 21:24:19 +01:00

390 lines
8.7 KiB
C
Raw Blame History

/*
* 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>
*/
#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/mt7620.h>
#include "common.h"
/* does the board have sdram or ddram */
static int dram_type;
static struct ralink_pinmux_grp mode_mux[] = {
{
.name = "i2c",
.mask = MT7620_GPIO_MODE_I2C,
.gpio_first = 1,
.gpio_last = 2,
}, {
.name = "spi",
.mask = MT7620_GPIO_MODE_SPI,
.gpio_first = 3,
.gpio_last = 6,
}, {
.name = "uartlite",
.mask = MT7620_GPIO_MODE_UART1,
.gpio_first = 15,
.gpio_last = 16,
}, {
.name = "wdt",
.mask = MT7620_GPIO_MODE_WDT,
.gpio_first = 17,
.gpio_last = 17,
}, {
.name = "mdio",
.mask = MT7620_GPIO_MODE_MDIO,
.gpio_first = 22,
.gpio_last = 23,
}, {
.name = "rgmii1",
.mask = MT7620_GPIO_MODE_RGMII1,
.gpio_first = 24,
.gpio_last = 35,
}, {
.name = "spi refclk",
.mask = MT7620_GPIO_MODE_SPI_REF_CLK,
.gpio_first = 37,
.gpio_last = 39,
}, {
.name = "jtag",
.mask = MT7620_GPIO_MODE_JTAG,
.gpio_first = 40,
.gpio_last = 44,
}, {
/* shared lines with jtag */
.name = "ephy",
.mask = MT7620_GPIO_MODE_EPHY,
.gpio_first = 40,
.gpio_last = 44,
}, {
.name = "nand",
.mask = MT7620_GPIO_MODE_JTAG,
.gpio_first = 45,
.gpio_last = 59,
}, {
.name = "rgmii2",
.mask = MT7620_GPIO_MODE_RGMII2,
.gpio_first = 60,
.gpio_last = 71,
}, {
.name = "wled",
.mask = MT7620_GPIO_MODE_WLED,
.gpio_first = 72,
.gpio_last = 72,
}, {0}
};
static struct ralink_pinmux_grp uart_mux[] = {
{
.name = "uartf",
.mask = MT7620_GPIO_MODE_UARTF,
.gpio_first = 7,
.gpio_last = 14,
}, {
.name = "pcm uartf",
.mask = MT7620_GPIO_MODE_PCM_UARTF,
.gpio_first = 7,
.gpio_last = 14,
}, {
.name = "pcm i2s",
.mask = MT7620_GPIO_MODE_PCM_I2S,
.gpio_first = 7,
.gpio_last = 14,
}, {
.name = "i2s uartf",
.mask = MT7620_GPIO_MODE_I2S_UARTF,
.gpio_first = 7,
.gpio_last = 14,
}, {
.name = "pcm gpio",
.mask = MT7620_GPIO_MODE_PCM_GPIO,
.gpio_first = 11,
.gpio_last = 14,
}, {
.name = "gpio uartf",
.mask = MT7620_GPIO_MODE_GPIO_UARTF,
.gpio_first = 7,
.gpio_last = 10,
}, {
.name = "gpio i2s",
.mask = MT7620_GPIO_MODE_GPIO_I2S,
.gpio_first = 7,
.gpio_last = 10,
}, {
.name = "gpio",
.mask = MT7620_GPIO_MODE_GPIO,
}, {0}
};
struct ralink_pinmux rt_gpio_pinmux = {
.mode = mode_mux,
.uart = uart_mux,
.uart_shift = MT7620_GPIO_MODE_UART0_SHIFT,
.uart_mask = MT7620_GPIO_MODE_UART0_MASK,
};
static __init u32
mt7620_calc_rate(u32 ref_rate, u32 mul, u32 div)
{
u64 t;
t = ref_rate;
t *= mul;
do_div(t, div);
return t;
}
#define MHZ(x) ((x) * 1000 * 1000)
static __init unsigned long
mt7620_get_xtal_rate(void)
{
u32 reg;
reg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0);
if (reg & SYSCFG0_XTAL_FREQ_SEL)
return MHZ(40);
return MHZ(20);
}
static __init unsigned long
mt7620_get_periph_rate(unsigned long xtal_rate)
{
u32 reg;
reg = rt_sysc_r32(SYSC_REG_CLKCFG0);
if (reg & CLKCFG0_PERI_CLK_SEL)
return xtal_rate;
return MHZ(40);
}
static const u32 mt7620_clk_divider[] __initconst = { 2, 3, 4, 8 };
static __init unsigned long
mt7620_get_cpu_pll_rate(unsigned long xtal_rate)
{
u32 reg;
u32 mul;
u32 div;
reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG0);
if (reg & CPLL_CFG0_BYPASS_REF_CLK)
return xtal_rate;
if ((reg & CPLL_CFG0_SW_CFG) == 0)
return MHZ(600);
mul = (reg >> CPLL_CFG0_PLL_MULT_RATIO_SHIFT) &
CPLL_CFG0_PLL_MULT_RATIO_MASK;
mul += 24;
if (reg & CPLL_CFG0_LC_CURFCK)
mul *= 2;
div = (reg >> CPLL_CFG0_PLL_DIV_RATIO_SHIFT) &
CPLL_CFG0_PLL_DIV_RATIO_MASK;
WARN_ON(div >= ARRAY_SIZE(mt7620_clk_divider));
return mt7620_calc_rate(xtal_rate, mul, mt7620_clk_divider[div]);
}
static __init unsigned long
mt7620_get_pll_rate(unsigned long xtal_rate, unsigned long cpu_pll_rate)
{
u32 reg;
reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG1);
if (reg & CPLL_CFG1_CPU_AUX1)
return xtal_rate;
if (reg & CPLL_CFG1_CPU_AUX0)
return MHZ(480);
return cpu_pll_rate;
}
static __init unsigned long
mt7620_get_cpu_rate(unsigned long pll_rate)
{
u32 reg;
u32 mul;
u32 div;
reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
mul = reg & CPU_SYS_CLKCFG_CPU_FFRAC_MASK;
div = (reg >> CPU_SYS_CLKCFG_CPU_FDIV_SHIFT) &
CPU_SYS_CLKCFG_CPU_FDIV_MASK;
return mt7620_calc_rate(pll_rate, mul, div);
}
static const u32 mt7620_ocp_dividers[16] __initconst = {
[CPU_SYS_CLKCFG_OCP_RATIO_2] = 2,
[CPU_SYS_CLKCFG_OCP_RATIO_3] = 3,
[CPU_SYS_CLKCFG_OCP_RATIO_4] = 4,
[CPU_SYS_CLKCFG_OCP_RATIO_5] = 5,
[CPU_SYS_CLKCFG_OCP_RATIO_10] = 10,
};
static __init unsigned long
mt7620_get_dram_rate(unsigned long pll_rate)
{
if (dram_type == SYSCFG0_DRAM_TYPE_SDRAM)
return pll_rate / 4;
return pll_rate / 3;
}
static __init unsigned long
mt7620_get_sys_rate(unsigned long cpu_rate)
{
u32 reg;
u32 ocp_ratio;
u32 div;
reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
ocp_ratio = (reg >> CPU_SYS_CLKCFG_OCP_RATIO_SHIFT) &
CPU_SYS_CLKCFG_OCP_RATIO_MASK;
if (WARN_ON(ocp_ratio >= ARRAY_SIZE(mt7620_ocp_dividers)))
return cpu_rate;
div = mt7620_ocp_dividers[ocp_ratio];
if (WARN(!div, "invalid divider for OCP ratio %u", ocp_ratio))
return cpu_rate;
return cpu_rate / div;
}
void __init ralink_clk_init(void)
{
unsigned long xtal_rate;
unsigned long cpu_pll_rate;
unsigned long pll_rate;
unsigned long cpu_rate;
unsigned long sys_rate;
unsigned long dram_rate;
unsigned long periph_rate;
xtal_rate = mt7620_get_xtal_rate();
cpu_pll_rate = mt7620_get_cpu_pll_rate(xtal_rate);
pll_rate = mt7620_get_pll_rate(xtal_rate, cpu_pll_rate);
cpu_rate = mt7620_get_cpu_rate(pll_rate);
dram_rate = mt7620_get_dram_rate(pll_rate);
sys_rate = mt7620_get_sys_rate(cpu_rate);
periph_rate = mt7620_get_periph_rate(xtal_rate);
#define RFMT(label) label ":%lu.%03luMHz "
#define RINT(x) ((x) / 1000000)
#define RFRAC(x) (((x) / 1000) % 1000)
pr_debug(RFMT("XTAL") RFMT("CPU_PLL") RFMT("PLL"),
RINT(xtal_rate), RFRAC(xtal_rate),
RINT(cpu_pll_rate), RFRAC(cpu_pll_rate),
RINT(pll_rate), RFRAC(pll_rate));
pr_debug(RFMT("CPU") RFMT("DRAM") RFMT("SYS") RFMT("PERIPH"),
RINT(cpu_rate), RFRAC(cpu_rate),
RINT(dram_rate), RFRAC(dram_rate),
RINT(sys_rate), RFRAC(sys_rate),
RINT(periph_rate), RFRAC(periph_rate));
#undef RFRAC
#undef RINT
#undef RFMT
ralink_clk_add("cpu", cpu_rate);
ralink_clk_add("10000100.timer", periph_rate);
ralink_clk_add("10000120.watchdog", periph_rate);
ralink_clk_add("10000500.uart", periph_rate);
ralink_clk_add("10000b00.spi", sys_rate);
ralink_clk_add("10000c00.uartlite", periph_rate);
}
void __init ralink_of_remap(void)
{
rt_sysc_membase = plat_of_remap_node("ralink,mt7620a-sysc");
rt_memc_membase = plat_of_remap_node("ralink,mt7620a-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(MT7620_SYSC_BASE);
unsigned char *name = NULL;
u32 n0;
u32 n1;
u32 rev;
u32 cfg0;
n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
if (n0 == MT7620N_CHIP_NAME0 && n1 == MT7620N_CHIP_NAME1) {
name = "MT7620N";
soc_info->compatible = "ralink,mt7620n-soc";
} else if (n0 == MT7620A_CHIP_NAME0 && n1 == MT7620A_CHIP_NAME1) {
name = "MT7620A";
soc_info->compatible = "ralink,mt7620a-soc";
} else {
panic("mt7620: unknown SoC, n0:%08x n1:%08x", n0, n1);
}
rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
"Ralink %s ver:%u eco:%u",
name,
(rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
(rev & CHIP_REV_ECO_MASK));
cfg0 = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG0);
dram_type = (cfg0 >> SYSCFG0_DRAM_TYPE_SHIFT) & SYSCFG0_DRAM_TYPE_MASK;
switch (dram_type) {
case SYSCFG0_DRAM_TYPE_SDRAM:
pr_info("Board has SDRAM\n");
soc_info->mem_size_min = MT7620_SDRAM_SIZE_MIN;
soc_info->mem_size_max = MT7620_SDRAM_SIZE_MAX;
break;
case SYSCFG0_DRAM_TYPE_DDR1:
pr_info("Board has DDR1\n");
soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN;
soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX;
break;
case SYSCFG0_DRAM_TYPE_DDR2:
pr_info("Board has DDR2\n");
soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN;
soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX;
break;
default:
BUG();
}
soc_info->mem_base = MT7620_DRAM_BASE;
}
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