1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 4 * Parts of this file are based on Ralink's 2.6.21 BSP 5 * 6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 7 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> 8 * Copyright (C) 2013 John Crispin <john@phrozen.org> 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/init.h> 13 14 #include <asm/mipsregs.h> 15 #include <asm/mach-ralink/ralink_regs.h> 16 #include <asm/mach-ralink/rt3883.h> 17 #include <asm/mach-ralink/pinmux.h> 18 19 #include "common.h" 20 21 static struct rt2880_pmx_func i2c_func[] = { FUNC("i2c", 0, 1, 2) }; 22 static struct rt2880_pmx_func spi_func[] = { FUNC("spi", 0, 3, 4) }; 23 static struct rt2880_pmx_func uartf_func[] = { 24 FUNC("uartf", RT3883_GPIO_MODE_UARTF, 7, 8), 25 FUNC("pcm uartf", RT3883_GPIO_MODE_PCM_UARTF, 7, 8), 26 FUNC("pcm i2s", RT3883_GPIO_MODE_PCM_I2S, 7, 8), 27 FUNC("i2s uartf", RT3883_GPIO_MODE_I2S_UARTF, 7, 8), 28 FUNC("pcm gpio", RT3883_GPIO_MODE_PCM_GPIO, 11, 4), 29 FUNC("gpio uartf", RT3883_GPIO_MODE_GPIO_UARTF, 7, 4), 30 FUNC("gpio i2s", RT3883_GPIO_MODE_GPIO_I2S, 7, 4), 31 }; 32 static struct rt2880_pmx_func uartlite_func[] = { FUNC("uartlite", 0, 15, 2) }; 33 static struct rt2880_pmx_func jtag_func[] = { FUNC("jtag", 0, 17, 5) }; 34 static struct rt2880_pmx_func mdio_func[] = { FUNC("mdio", 0, 22, 2) }; 35 static struct rt2880_pmx_func lna_a_func[] = { FUNC("lna a", 0, 32, 3) }; 36 static struct rt2880_pmx_func lna_g_func[] = { FUNC("lna g", 0, 35, 3) }; 37 static struct rt2880_pmx_func pci_func[] = { 38 FUNC("pci-dev", 0, 40, 32), 39 FUNC("pci-host2", 1, 40, 32), 40 FUNC("pci-host1", 2, 40, 32), 41 FUNC("pci-fnc", 3, 40, 32) 42 }; 43 static struct rt2880_pmx_func ge1_func[] = { FUNC("ge1", 0, 72, 12) }; 44 static struct rt2880_pmx_func ge2_func[] = { FUNC("ge2", 0, 84, 12) }; 45 46 static struct rt2880_pmx_group rt3883_pinmux_data[] = { 47 GRP("i2c", i2c_func, 1, RT3883_GPIO_MODE_I2C), 48 GRP("spi", spi_func, 1, RT3883_GPIO_MODE_SPI), 49 GRP("uartf", uartf_func, RT3883_GPIO_MODE_UART0_MASK, 50 RT3883_GPIO_MODE_UART0_SHIFT), 51 GRP("uartlite", uartlite_func, 1, RT3883_GPIO_MODE_UART1), 52 GRP("jtag", jtag_func, 1, RT3883_GPIO_MODE_JTAG), 53 GRP("mdio", mdio_func, 1, RT3883_GPIO_MODE_MDIO), 54 GRP("lna a", lna_a_func, 1, RT3883_GPIO_MODE_LNA_A), 55 GRP("lna g", lna_g_func, 1, RT3883_GPIO_MODE_LNA_G), 56 GRP("pci", pci_func, RT3883_GPIO_MODE_PCI_MASK, 57 RT3883_GPIO_MODE_PCI_SHIFT), 58 GRP("ge1", ge1_func, 1, RT3883_GPIO_MODE_GE1), 59 GRP("ge2", ge2_func, 1, RT3883_GPIO_MODE_GE2), 60 { 0 } 61 }; 62 63 void __init ralink_clk_init(void) 64 { 65 unsigned long cpu_rate, sys_rate; 66 u32 syscfg0; 67 u32 clksel; 68 u32 ddr2; 69 70 syscfg0 = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG0); 71 clksel = ((syscfg0 >> RT3883_SYSCFG0_CPUCLK_SHIFT) & 72 RT3883_SYSCFG0_CPUCLK_MASK); 73 ddr2 = syscfg0 & RT3883_SYSCFG0_DRAM_TYPE_DDR2; 74 75 switch (clksel) { 76 case RT3883_SYSCFG0_CPUCLK_250: 77 cpu_rate = 250000000; 78 sys_rate = (ddr2) ? 125000000 : 83000000; 79 break; 80 case RT3883_SYSCFG0_CPUCLK_384: 81 cpu_rate = 384000000; 82 sys_rate = (ddr2) ? 128000000 : 96000000; 83 break; 84 case RT3883_SYSCFG0_CPUCLK_480: 85 cpu_rate = 480000000; 86 sys_rate = (ddr2) ? 160000000 : 120000000; 87 break; 88 case RT3883_SYSCFG0_CPUCLK_500: 89 cpu_rate = 500000000; 90 sys_rate = (ddr2) ? 166000000 : 125000000; 91 break; 92 } 93 94 ralink_clk_add("cpu", cpu_rate); 95 ralink_clk_add("10000100.timer", sys_rate); 96 ralink_clk_add("10000120.watchdog", sys_rate); 97 ralink_clk_add("10000500.uart", 40000000); 98 ralink_clk_add("10000900.i2c", 40000000); 99 ralink_clk_add("10000a00.i2s", 40000000); 100 ralink_clk_add("10000b00.spi", sys_rate); 101 ralink_clk_add("10000b40.spi", sys_rate); 102 ralink_clk_add("10000c00.uartlite", 40000000); 103 ralink_clk_add("10100000.ethernet", sys_rate); 104 ralink_clk_add("10180000.wmac", 40000000); 105 } 106 107 void __init ralink_of_remap(void) 108 { 109 rt_sysc_membase = plat_of_remap_node("ralink,rt3883-sysc"); 110 rt_memc_membase = plat_of_remap_node("ralink,rt3883-memc"); 111 112 if (!rt_sysc_membase || !rt_memc_membase) 113 panic("Failed to remap core resources"); 114 } 115 116 void __init prom_soc_init(struct ralink_soc_info *soc_info) 117 { 118 void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT3883_SYSC_BASE); 119 const char *name; 120 u32 n0; 121 u32 n1; 122 u32 id; 123 124 n0 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID0_3); 125 n1 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID4_7); 126 id = __raw_readl(sysc + RT3883_SYSC_REG_REVID); 127 128 if (n0 == RT3883_CHIP_NAME0 && n1 == RT3883_CHIP_NAME1) { 129 soc_info->compatible = "ralink,rt3883-soc"; 130 name = "RT3883"; 131 } else { 132 panic("rt3883: unknown SoC, n0:%08x n1:%08x", n0, n1); 133 } 134 135 snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN, 136 "Ralink %s ver:%u eco:%u", 137 name, 138 (id >> RT3883_REVID_VER_ID_SHIFT) & RT3883_REVID_VER_ID_MASK, 139 (id & RT3883_REVID_ECO_ID_MASK)); 140 141 soc_info->mem_base = RT3883_SDRAM_BASE; 142 soc_info->mem_size_min = RT3883_MEM_SIZE_MIN; 143 soc_info->mem_size_max = RT3883_MEM_SIZE_MAX; 144 145 rt2880_pinmux_data = rt3883_pinmux_data; 146 147 ralink_soc = RT3883_SOC; 148 } 149