diff options
Diffstat (limited to 'arch/mips/ralink/mt7621.c')
| -rw-r--r-- | arch/mips/ralink/mt7621.c | 301 |
1 files changed, 145 insertions, 156 deletions
diff --git a/arch/mips/ralink/mt7621.c b/arch/mips/ralink/mt7621.c index 9415be0d57b8..5a9fd3fe41d7 100644 --- a/arch/mips/ralink/mt7621.c +++ b/arch/mips/ralink/mt7621.c @@ -7,167 +7,165 @@ #include <linux/kernel.h> #include <linux/init.h> +#include <linux/slab.h> +#include <linux/sys_soc.h> +#include <linux/memblock.h> +#include <linux/pci.h> +#include <linux/bug.h> +#include <asm/bootinfo.h> #include <asm/mipsregs.h> #include <asm/smp-ops.h> #include <asm/mips-cps.h> #include <asm/mach-ralink/ralink_regs.h> #include <asm/mach-ralink/mt7621.h> -#include <pinmux.h> - #include "common.h" -#define SYSC_REG_SYSCFG 0x10 -#define SYSC_REG_CPLL_CLKCFG0 0x2c -#define SYSC_REG_CUR_CLK_STS 0x44 -#define CPU_CLK_SEL (BIT(30) | BIT(31)) - -#define MT7621_GPIO_MODE_UART1 1 -#define MT7621_GPIO_MODE_I2C 2 -#define MT7621_GPIO_MODE_UART3_MASK 0x3 -#define MT7621_GPIO_MODE_UART3_SHIFT 3 -#define MT7621_GPIO_MODE_UART3_GPIO 1 -#define MT7621_GPIO_MODE_UART2_MASK 0x3 -#define MT7621_GPIO_MODE_UART2_SHIFT 5 -#define MT7621_GPIO_MODE_UART2_GPIO 1 -#define MT7621_GPIO_MODE_JTAG 7 -#define MT7621_GPIO_MODE_WDT_MASK 0x3 -#define MT7621_GPIO_MODE_WDT_SHIFT 8 -#define MT7621_GPIO_MODE_WDT_GPIO 1 -#define MT7621_GPIO_MODE_PCIE_RST 0 -#define MT7621_GPIO_MODE_PCIE_REF 2 -#define MT7621_GPIO_MODE_PCIE_MASK 0x3 -#define MT7621_GPIO_MODE_PCIE_SHIFT 10 -#define MT7621_GPIO_MODE_PCIE_GPIO 1 -#define MT7621_GPIO_MODE_MDIO_MASK 0x3 -#define MT7621_GPIO_MODE_MDIO_SHIFT 12 -#define MT7621_GPIO_MODE_MDIO_GPIO 1 -#define MT7621_GPIO_MODE_RGMII1 14 -#define MT7621_GPIO_MODE_RGMII2 15 -#define MT7621_GPIO_MODE_SPI_MASK 0x3 -#define MT7621_GPIO_MODE_SPI_SHIFT 16 -#define MT7621_GPIO_MODE_SPI_GPIO 1 -#define MT7621_GPIO_MODE_SDHCI_MASK 0x3 -#define MT7621_GPIO_MODE_SDHCI_SHIFT 18 -#define MT7621_GPIO_MODE_SDHCI_GPIO 1 - -static struct rt2880_pmx_func uart1_grp[] = { FUNC("uart1", 0, 1, 2) }; -static struct rt2880_pmx_func i2c_grp[] = { FUNC("i2c", 0, 3, 2) }; -static struct rt2880_pmx_func uart3_grp[] = { - FUNC("uart3", 0, 5, 4), - FUNC("i2s", 2, 5, 4), - FUNC("spdif3", 3, 5, 4), -}; -static struct rt2880_pmx_func uart2_grp[] = { - FUNC("uart2", 0, 9, 4), - FUNC("pcm", 2, 9, 4), - FUNC("spdif2", 3, 9, 4), -}; -static struct rt2880_pmx_func jtag_grp[] = { FUNC("jtag", 0, 13, 5) }; -static struct rt2880_pmx_func wdt_grp[] = { - FUNC("wdt rst", 0, 18, 1), - FUNC("wdt refclk", 2, 18, 1), -}; -static struct rt2880_pmx_func pcie_rst_grp[] = { - FUNC("pcie rst", MT7621_GPIO_MODE_PCIE_RST, 19, 1), - FUNC("pcie refclk", MT7621_GPIO_MODE_PCIE_REF, 19, 1) -}; -static struct rt2880_pmx_func mdio_grp[] = { FUNC("mdio", 0, 20, 2) }; -static struct rt2880_pmx_func rgmii2_grp[] = { FUNC("rgmii2", 0, 22, 12) }; -static struct rt2880_pmx_func spi_grp[] = { - FUNC("spi", 0, 34, 7), - FUNC("nand1", 2, 34, 7), -}; -static struct rt2880_pmx_func sdhci_grp[] = { - FUNC("sdhci", 0, 41, 8), - FUNC("nand2", 2, 41, 8), -}; -static struct rt2880_pmx_func rgmii1_grp[] = { FUNC("rgmii1", 0, 49, 12) }; - -static struct rt2880_pmx_group mt7621_pinmux_data[] = { - GRP("uart1", uart1_grp, 1, MT7621_GPIO_MODE_UART1), - GRP("i2c", i2c_grp, 1, MT7621_GPIO_MODE_I2C), - GRP_G("uart3", uart3_grp, MT7621_GPIO_MODE_UART3_MASK, - MT7621_GPIO_MODE_UART3_GPIO, MT7621_GPIO_MODE_UART3_SHIFT), - GRP_G("uart2", uart2_grp, MT7621_GPIO_MODE_UART2_MASK, - MT7621_GPIO_MODE_UART2_GPIO, MT7621_GPIO_MODE_UART2_SHIFT), - GRP("jtag", jtag_grp, 1, MT7621_GPIO_MODE_JTAG), - GRP_G("wdt", wdt_grp, MT7621_GPIO_MODE_WDT_MASK, - MT7621_GPIO_MODE_WDT_GPIO, MT7621_GPIO_MODE_WDT_SHIFT), - GRP_G("pcie", pcie_rst_grp, MT7621_GPIO_MODE_PCIE_MASK, - MT7621_GPIO_MODE_PCIE_GPIO, MT7621_GPIO_MODE_PCIE_SHIFT), - GRP_G("mdio", mdio_grp, MT7621_GPIO_MODE_MDIO_MASK, - MT7621_GPIO_MODE_MDIO_GPIO, MT7621_GPIO_MODE_MDIO_SHIFT), - GRP("rgmii2", rgmii2_grp, 1, MT7621_GPIO_MODE_RGMII2), - GRP_G("spi", spi_grp, MT7621_GPIO_MODE_SPI_MASK, - MT7621_GPIO_MODE_SPI_GPIO, MT7621_GPIO_MODE_SPI_SHIFT), - GRP_G("sdhci", sdhci_grp, MT7621_GPIO_MODE_SDHCI_MASK, - MT7621_GPIO_MODE_SDHCI_GPIO, MT7621_GPIO_MODE_SDHCI_SHIFT), - GRP("rgmii1", rgmii1_grp, 1, MT7621_GPIO_MODE_RGMII1), - { 0 } -}; +#define MT7621_MEM_TEST_PATTERN 0xaa5555aa + +static u32 detect_magic __initdata; +static struct ralink_soc_info *soc_info_ptr; + +int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) +{ + struct resource_entry *entry; + resource_size_t mask; + + entry = resource_list_first_type(&bridge->windows, IORESOURCE_MEM); + if (!entry) { + pr_err("Cannot get memory resource\n"); + return -EINVAL; + } + + if (mips_cps_numiocu(0)) { + /* + * Hardware doesn't accept mask values with 1s after + * 0s (e.g. 0xffef), so warn if that's happen + */ + mask = ~(entry->res->end - entry->res->start) & CM_GCR_REGn_MASK_ADDRMASK; + WARN_ON(mask && BIT(ffz(~mask)) - 1 != ~mask); + + write_gcr_reg1_base(entry->res->start); + write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0); + pr_info("PCI coherence region base: 0x%08llx, mask/settings: 0x%08llx\n", + (unsigned long long)read_gcr_reg1_base(), + (unsigned long long)read_gcr_reg1_mask()); + } + + return 0; +} phys_addr_t mips_cpc_default_phys_base(void) { panic("Cannot detect cpc address"); } -void __init ralink_clk_init(void) +static bool __init mt7621_addr_wraparound_test(phys_addr_t size) { - int cpu_fdiv = 0; - int cpu_ffrac = 0; - int fbdiv = 0; - u32 clk_sts, syscfg; - u8 clk_sel = 0, xtal_mode; - u32 cpu_clk; - - if ((rt_sysc_r32(SYSC_REG_CPLL_CLKCFG0) & CPU_CLK_SEL) != 0) - clk_sel = 1; - - switch (clk_sel) { - case 0: - clk_sts = rt_sysc_r32(SYSC_REG_CUR_CLK_STS); - cpu_fdiv = ((clk_sts >> 8) & 0x1F); - cpu_ffrac = (clk_sts & 0x1F); - cpu_clk = (500 * cpu_ffrac / cpu_fdiv) * 1000 * 1000; - break; - - case 1: - fbdiv = ((rt_sysc_r32(0x648) >> 4) & 0x7F) + 1; - syscfg = rt_sysc_r32(SYSC_REG_SYSCFG); - xtal_mode = (syscfg >> 6) & 0x7; - if (xtal_mode >= 6) { - /* 25Mhz Xtal */ - cpu_clk = 25 * fbdiv * 1000 * 1000; - } else if (xtal_mode >= 3) { - /* 40Mhz Xtal */ - cpu_clk = 40 * fbdiv * 1000 * 1000; - } else { - /* 20Mhz Xtal */ - cpu_clk = 20 * fbdiv * 1000 * 1000; + void *dm = (void *)KSEG1ADDR(&detect_magic); + + if (CPHYSADDR(dm + size) >= MT7621_LOWMEM_MAX_SIZE) + return true; + __raw_writel(MT7621_MEM_TEST_PATTERN, dm); + if (__raw_readl(dm) != __raw_readl(dm + size)) + return false; + __raw_writel(~MT7621_MEM_TEST_PATTERN, dm); + return __raw_readl(dm) == __raw_readl(dm + size); +} + +static void __init mt7621_memory_detect(void) +{ + phys_addr_t size; + + for (size = 32 * SZ_1M; size <= 256 * SZ_1M; size <<= 1) { + if (mt7621_addr_wraparound_test(size)) { + memblock_add(MT7621_LOWMEM_BASE, size); + return; } - break; } + + memblock_add(MT7621_LOWMEM_BASE, MT7621_LOWMEM_MAX_SIZE); + memblock_add(MT7621_HIGHMEM_BASE, MT7621_HIGHMEM_SIZE); +} + +static unsigned int __init mt7621_get_soc_name0(void) +{ + return __raw_readl(MT7621_SYSC_BASE + SYSC_REG_CHIP_NAME0); +} + +static unsigned int __init mt7621_get_soc_name1(void) +{ + return __raw_readl(MT7621_SYSC_BASE + SYSC_REG_CHIP_NAME1); +} + +static bool __init mt7621_soc_valid(void) +{ + if (mt7621_get_soc_name0() == MT7621_CHIP_NAME0 && + mt7621_get_soc_name1() == MT7621_CHIP_NAME1) + return true; + else + return false; } -void __init ralink_of_remap(void) +static const char __init *mt7621_get_soc_id(void) { - rt_sysc_membase = plat_of_remap_node("mtk,mt7621-sysc"); - rt_memc_membase = plat_of_remap_node("mtk,mt7621-memc"); + if (mt7621_soc_valid()) + return "MT7621"; + else + return "invalid"; +} - if (!rt_sysc_membase || !rt_memc_membase) - panic("Failed to remap core resources"); +static unsigned int __init mt7621_get_soc_rev(void) +{ + return __raw_readl(MT7621_SYSC_BASE + SYSC_REG_CHIP_REV); +} + +static unsigned int __init mt7621_get_soc_ver(void) +{ + return (mt7621_get_soc_rev() >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK; +} + +static unsigned int __init mt7621_get_soc_eco(void) +{ + return (mt7621_get_soc_rev() & CHIP_REV_ECO_MASK); +} + +static const char __init *mt7621_get_soc_revision(void) +{ + if (mt7621_get_soc_rev() == 1 && mt7621_get_soc_eco() == 1) + return "E2"; + else + return "E1"; } -void prom_soc_init(struct ralink_soc_info *soc_info) +static int __init mt7621_soc_dev_init(void) { - void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7621_SYSC_BASE); - unsigned char *name = NULL; - u32 n0; - u32 n1; - u32 rev; + struct soc_device *soc_dev; + struct soc_device_attribute *soc_dev_attr; + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) + return -ENOMEM; + + soc_dev_attr->soc_id = "mt7621"; + soc_dev_attr->family = "Ralink"; + soc_dev_attr->revision = mt7621_get_soc_revision(); + + 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(mt7621_soc_dev_init); + +void __init prom_soc_init(struct ralink_soc_info *soc_info) +{ /* Early detection of CMP support */ mips_cm_probe(); mips_cpc_probe(); @@ -177,7 +175,7 @@ void prom_soc_init(struct ralink_soc_info *soc_info) * mips_cm_probe() wipes out bootloader * config for CM regions and we have to configure them * again. This SoC cannot talk to pamlbus devices - * witout proper iocu region set up. + * without proper iocu region set up. * * FIXME: it would be better to do this with values * from DT, but we need this very early because @@ -190,35 +188,26 @@ void prom_soc_init(struct ralink_soc_info *soc_info) __sync(); } - n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0); - n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1); - - if (n0 == MT7621_CHIP_NAME0 && n1 == MT7621_CHIP_NAME1) { - name = "MT7621"; - soc_info->compatible = "mtk,mt7621-soc"; - } else { - panic("mt7621: unknown SoC, n0:%08x n1:%08x\n", n0, n1); - } + if (mt7621_soc_valid()) + soc_info->compatible = "mediatek,mt7621-soc"; + else + panic("mt7621: unknown SoC, n0:%08x n1:%08x\n", + mt7621_get_soc_name0(), + mt7621_get_soc_name1()); ralink_soc = MT762X_SOC_MT7621AT; - rev = __raw_readl(sysc + SYSC_REG_CHIP_REV); snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN, "MediaTek %s ver:%u eco:%u", - name, - (rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK, - (rev & CHIP_REV_ECO_MASK)); - - soc_info->mem_size_min = MT7621_DDR2_SIZE_MIN; - soc_info->mem_size_max = MT7621_DDR2_SIZE_MAX; - soc_info->mem_base = MT7621_DRAM_BASE; + mt7621_get_soc_id(), + mt7621_get_soc_ver(), + mt7621_get_soc_eco()); - rt2880_pinmux_data = mt7621_pinmux_data; + soc_info->mem_detect = mt7621_memory_detect; + soc_info_ptr = soc_info; if (!register_cps_smp_ops()) return; - if (!register_cmp_smp_ops()) - return; if (!register_vsmp_smp_ops()) return; } |