/* * 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 * Copyright (C) 2008 Imre Kaloz * Copyright (C) 2013 John Crispin */ #include #include #include #include #include #include #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; }