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MIPS: ralink: add mt7628an support
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Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/8031/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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John Crispin authored and Ralf Baechle committed Nov 24, 2014
1 parent 1dc5c2c commit 53263a1
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Showing 3 changed files with 243 additions and 46 deletions.
11 changes: 11 additions & 0 deletions arch/mips/include/asm/mach-ralink/mt7620.h
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,13 @@
#ifndef _MT7620_REGS_H_
#define _MT7620_REGS_H_

enum mt762x_soc_type {
MT762X_SOC_UNKNOWN = 0,
MT762X_SOC_MT7620A,
MT762X_SOC_MT7620N,
MT762X_SOC_MT7628AN,
};

#define MT7620_SYSC_BASE 0x10000000

#define SYSC_REG_CHIP_NAME0 0x00
Expand All @@ -27,6 +34,7 @@

#define MT7620_CHIP_NAME0 0x3637544d
#define MT7620_CHIP_NAME1 0x20203032
#define MT7628_CHIP_NAME1 0x20203832

#define SYSCFG0_XTAL_FREQ_SEL BIT(6)

Expand Down Expand Up @@ -71,6 +79,9 @@
#define SYSCFG0_DRAM_TYPE_DDR1 1
#define SYSCFG0_DRAM_TYPE_DDR2 2

#define SYSCFG0_DRAM_TYPE_DDR2_MT7628 0
#define SYSCFG0_DRAM_TYPE_DDR1_MT7628 1

#define MT7620_DRAM_BASE 0x0
#define MT7620_SDRAM_SIZE_MIN 2
#define MT7620_SDRAM_SIZE_MAX 64
Expand Down
2 changes: 1 addition & 1 deletion arch/mips/ralink/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@ choice
select HW_HAS_PCI

config SOC_MT7620
bool "MT7620"
bool "MT7620/8"

endchoice

Expand Down
276 changes: 231 additions & 45 deletions arch/mips/ralink/mt7620.c
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,9 @@
#define PMU1_CFG 0x8C
#define DIG_SW_SEL BIT(25)

/* is this a MT7620 or a MT7628 */
enum mt762x_soc_type mt762x_soc;

/* does the board have sdram or ddram */
static int dram_type;

Expand Down Expand Up @@ -94,6 +97,136 @@ static struct rt2880_pmx_group mt7620a_pinmux_data[] = {
{ 0 }
};

static struct rt2880_pmx_func pwm1_grp_mt7628[] = {
FUNC("sdcx", 3, 19, 1),
FUNC("utif", 2, 19, 1),
FUNC("gpio", 1, 19, 1),
FUNC("pwm", 0, 19, 1),
};

static struct rt2880_pmx_func pwm0_grp_mt7628[] = {
FUNC("sdcx", 3, 18, 1),
FUNC("utif", 2, 18, 1),
FUNC("gpio", 1, 18, 1),
FUNC("pwm", 0, 18, 1),
};

static struct rt2880_pmx_func uart2_grp_mt7628[] = {
FUNC("sdcx", 3, 20, 2),
FUNC("pwm", 2, 20, 2),
FUNC("gpio", 1, 20, 2),
FUNC("uart", 0, 20, 2),
};

static struct rt2880_pmx_func uart1_grp_mt7628[] = {
FUNC("sdcx", 3, 45, 2),
FUNC("pwm", 2, 45, 2),
FUNC("gpio", 1, 45, 2),
FUNC("uart", 0, 45, 2),
};

static struct rt2880_pmx_func i2c_grp_mt7628[] = {
FUNC("-", 3, 4, 2),
FUNC("debug", 2, 4, 2),
FUNC("gpio", 1, 4, 2),
FUNC("i2c", 0, 4, 2),
};

static struct rt2880_pmx_func refclk_grp_mt7628[] = { FUNC("reclk", 0, 36, 1) };
static struct rt2880_pmx_func perst_grp_mt7628[] = { FUNC("perst", 0, 37, 1) };
static struct rt2880_pmx_func wdt_grp_mt7628[] = { FUNC("wdt", 0, 15, 38) };
static struct rt2880_pmx_func spi_grp_mt7628[] = { FUNC("spi", 0, 7, 4) };

static struct rt2880_pmx_func sd_mode_grp_mt7628[] = {
FUNC("jtag", 3, 22, 8),
FUNC("utif", 2, 22, 8),
FUNC("gpio", 1, 22, 8),
FUNC("sdcx", 0, 22, 8),
};

static struct rt2880_pmx_func uart0_grp_mt7628[] = {
FUNC("-", 3, 12, 2),
FUNC("-", 2, 12, 2),
FUNC("gpio", 1, 12, 2),
FUNC("uart", 0, 12, 2),
};

static struct rt2880_pmx_func i2s_grp_mt7628[] = {
FUNC("antenna", 3, 0, 4),
FUNC("pcm", 2, 0, 4),
FUNC("gpio", 1, 0, 4),
FUNC("i2s", 0, 0, 4),
};

static struct rt2880_pmx_func spi_cs1_grp_mt7628[] = {
FUNC("-", 3, 6, 1),
FUNC("refclk", 2, 6, 1),
FUNC("gpio", 1, 6, 1),
FUNC("spi", 0, 6, 1),
};

static struct rt2880_pmx_func spis_grp_mt7628[] = {
FUNC("pwm", 3, 14, 4),
FUNC("util", 2, 14, 4),
FUNC("gpio", 1, 14, 4),
FUNC("spis", 0, 14, 4),
};

static struct rt2880_pmx_func gpio_grp_mt7628[] = {
FUNC("pcie", 3, 11, 1),
FUNC("refclk", 2, 11, 1),
FUNC("gpio", 1, 11, 1),
FUNC("gpio", 0, 11, 1),
};

#define MT7628_GPIO_MODE_MASK 0x3

#define MT7628_GPIO_MODE_PWM1 30
#define MT7628_GPIO_MODE_PWM0 28
#define MT7628_GPIO_MODE_UART2 26
#define MT7628_GPIO_MODE_UART1 24
#define MT7628_GPIO_MODE_I2C 20
#define MT7628_GPIO_MODE_REFCLK 18
#define MT7628_GPIO_MODE_PERST 16
#define MT7628_GPIO_MODE_WDT 14
#define MT7628_GPIO_MODE_SPI 12
#define MT7628_GPIO_MODE_SDMODE 10
#define MT7628_GPIO_MODE_UART0 8
#define MT7628_GPIO_MODE_I2S 6
#define MT7628_GPIO_MODE_CS1 4
#define MT7628_GPIO_MODE_SPIS 2
#define MT7628_GPIO_MODE_GPIO 0

static struct rt2880_pmx_group mt7628an_pinmux_data[] = {
GRP_G("pmw1", pwm1_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_PWM1),
GRP_G("pmw1", pwm0_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_PWM0),
GRP_G("uart2", uart2_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_UART2),
GRP_G("uart1", uart1_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_UART1),
GRP_G("i2c", i2c_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_I2C),
GRP("refclk", refclk_grp_mt7628, 1, MT7628_GPIO_MODE_REFCLK),
GRP("perst", perst_grp_mt7628, 1, MT7628_GPIO_MODE_PERST),
GRP("wdt", wdt_grp_mt7628, 1, MT7628_GPIO_MODE_WDT),
GRP("spi", spi_grp_mt7628, 1, MT7628_GPIO_MODE_SPI),
GRP_G("sdmode", sd_mode_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_SDMODE),
GRP_G("uart0", uart0_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_UART0),
GRP_G("i2s", i2s_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_I2S),
GRP_G("spi cs1", spi_cs1_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_CS1),
GRP_G("spis", spis_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_SPIS),
GRP_G("gpio", gpio_grp_mt7628, MT7628_GPIO_MODE_MASK,
1, MT7628_GPIO_MODE_GPIO),
{ 0 }
};

static __init u32
mt7620_calc_rate(u32 ref_rate, u32 mul, u32 div)
{
Expand Down Expand Up @@ -244,37 +377,49 @@ void __init ralink_clk_init(void)

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));
if (mt762x_soc == MT762X_SOC_MT7628AN) {
if (xtal_rate == MHZ(40))
cpu_rate = MHZ(580);
else
cpu_rate = MHZ(575);
dram_rate = sys_rate = cpu_rate / 3;
periph_rate = MHZ(40);

ralink_clk_add("10000d00.uartlite", periph_rate);
ralink_clk_add("10000e00.uartlite", periph_rate);
} else {
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);

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));

ralink_clk_add("10000500.uart", periph_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);
ralink_clk_add("10180000.wmac", xtal_rate);
Expand All @@ -289,6 +434,52 @@ void __init ralink_of_remap(void)
panic("Failed to remap core resources");
}

static __init void
mt7620_dram_init(struct ralink_soc_info *soc_info)
{
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();
}
}

static __init void
mt7628_dram_init(struct ralink_soc_info *soc_info)
{
switch (dram_type) {
case SYSCFG0_DRAM_TYPE_DDR1_MT7628:
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_MT7628:
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();
}
}

void prom_soc_init(struct ralink_soc_info *soc_info)
{
void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7620_SYSC_BASE);
Expand All @@ -306,18 +497,25 @@ void prom_soc_init(struct ralink_soc_info *soc_info)
rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
bga = (rev >> CHIP_REV_PKG_SHIFT) & CHIP_REV_PKG_MASK;

if (n0 != MT7620_CHIP_NAME0 || n1 != MT7620_CHIP_NAME1)
panic("mt7620: unknown SoC, n0:%08x n1:%08x\n", n0, n1);

if (bga) {
name = "MT7620A";
soc_info->compatible = "ralink,mt7620a-soc";
} else {
name = "MT7620N";
soc_info->compatible = "ralink,mt7620n-soc";
if (n0 == MT7620_CHIP_NAME0 && n1 == MT7620_CHIP_NAME1) {
if (bga) {
mt762x_soc = MT762X_SOC_MT7620A;
name = "MT7620A";
soc_info->compatible = "ralink,mt7620a-soc";
} else {
mt762x_soc = MT762X_SOC_MT7620N;
name = "MT7620N";
soc_info->compatible = "ralink,mt7620n-soc";
#ifdef CONFIG_PCI
panic("mt7620n is only supported for non pci kernels");
panic("mt7620n is only supported for non pci kernels");
#endif
}
} else if (n0 == MT7620_CHIP_NAME0 && n1 == MT7628_CHIP_NAME1) {
mt762x_soc = MT762X_SOC_MT7628AN;
name = "MT7628AN";
soc_info->compatible = "ralink,mt7628an-soc";
} else {
panic("mt762x: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
}

snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
Expand All @@ -329,28 +527,11 @@ void prom_soc_init(struct ralink_soc_info *soc_info)
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;
if (mt762x_soc == MT762X_SOC_MT7628AN)
mt7628_dram_init(soc_info);
else
mt7620_dram_init(soc_info);

pmu0 = __raw_readl(sysc + PMU0_CFG);
pmu1 = __raw_readl(sysc + PMU1_CFG);
Expand All @@ -359,4 +540,9 @@ void prom_soc_init(struct ralink_soc_info *soc_info)
(pmu0 & PMU_SW_SET) ? ("sw") : ("hw"));
pr_info("Digital PMU set to %s control\n",
(pmu1 & DIG_SW_SEL) ? ("sw") : ("hw"));

if (mt762x_soc == MT762X_SOC_MT7628AN)
rt2880_pinmux_data = mt7628an_pinmux_data;
else
rt2880_pinmux_data = mt7620a_pinmux_data;
}

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