arch/arm/mach-exynos/mach-exynos5-dt.c

   1 /*
   2  * SAMSUNG EXYNOS5250 Flattened Device Tree enabled machine
   3  *
   4  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   5  *              http://www.samsung.com
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 #include <linux/of_platform.h>
  13 #include <linux/of_fdt.h>
  14 #include <linux/serial_core.h>
  15 #include <linux/memblock.h>
  16 #include <linux/io.h>
  17
  18 #include <asm/mach/arch.h>
  19 #include <asm/hardware/gic.h>
  20 #include <mach/map.h>
  21 #include <mach/regs-pmu.h>
  22
  23 #include <plat/cpu.h>
  24 #include <plat/regs-serial.h>
  25 #include <plat/mfc.h>
  26
  27 #include "common.h"
  28
  29 /*
  30  * The following lookup table is used to override device names when devices
  31  * are registered from device tree. This is temporarily added to enable
  32  * device tree support addition for the EXYNOS5 architecture.
  33  *
  34  * For drivers that require platform data to be provided from the machine
  35  * file, a platform data pointer can also be supplied along with the
  36  * devices names. Usually, the platform data elements that cannot be parsed
  37  * from the device tree by the drivers (example: function pointers) are
  38  * supplied. But it should be noted that this is a temporary mechanism and
  39  * at some point, the drivers should be capable of parsing all the platform
  40  * data from the device tree.
  41  */
  42 static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
  43         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART0,
  44                                 "exynos4210-uart.0", NULL),
  45         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART1,
  46                                 "exynos4210-uart.1", NULL),
  47         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART2,
  48                                 "exynos4210-uart.2", NULL),
  49         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART3,
  50                                 "exynos4210-uart.3", NULL),
  51         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(0),
  52                                 "s3c2440-i2c.0", NULL),
  53         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(1),
  54                                 "s3c2440-i2c.1", NULL),
  55         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(2),
  56                                 "s3c2440-i2c.2", NULL),
  57         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(3),
  58                                 "s3c2440-i2c.3", NULL),
  59         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(4),
  60                                 "s3c2440-i2c.4", NULL),
  61         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(5),
  62                                 "s3c2440-i2c.5", NULL),
  63         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(6),
  64                                 "s3c2440-i2c.6", NULL),
  65         OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(7),
  66                                 "s3c2440-i2c.7", NULL),
  67         OF_DEV_AUXDATA("samsung,s3c2440-hdmiphy-i2c", EXYNOS5_PA_IIC(8),
  68                                 "s3c2440-hdmiphy-i2c", NULL),
  69         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI0,
  70                                 "dw_mmc.0", NULL),
  71         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI1,
  72                                 "dw_mmc.1", NULL),
  73         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI2,
  74                                 "dw_mmc.2", NULL),
  75         OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI3,
  76                                 "dw_mmc.3", NULL),
  77         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI0,
  78                                 "exynos4210-spi.0", NULL),
  79         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI1,
  80                                 "exynos4210-spi.1", NULL),
  81         OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI2,
  82                                 "exynos4210-spi.2", NULL),
  83         OF_DEV_AUXDATA("samsung,exynos5-sata-ahci", 0x122F0000,
  84                                 "exynos5-sata", NULL),
  85         OF_DEV_AUXDATA("samsung,exynos5-sata-phy", 0x12170000,
  86                                 "exynos5-sata-phy", NULL),
  87         OF_DEV_AUXDATA("samsung,exynos5-sata-phy-i2c", 0x121D0000,
  88                                 "exynos5-sata-phy-i2c", NULL),
  89         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA0, "dma-pl330.0", NULL),
  90         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA1, "dma-pl330.1", NULL),
  91         OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_MDMA1, "dma-pl330.2", NULL),
  92         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC0,
  93                                 "exynos-gsc.0", NULL),
  94         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC1,
  95                                 "exynos-gsc.1", NULL),
  96         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC2,
  97                                 "exynos-gsc.2", NULL),
  98         OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC3,
  99                                 "exynos-gsc.3", NULL),
 100         OF_DEV_AUXDATA("samsung,exynos5-hdmi", 0x14530000,
 101                                 "exynos5-hdmi", NULL),
 102         OF_DEV_AUXDATA("samsung,exynos5-mixer", 0x14450000,
 103                                 "exynos5-mixer", NULL),
 104         OF_DEV_AUXDATA("samsung,mfc-v6", 0x11000000, "s5p-mfc-v6", NULL),
 105         OF_DEV_AUXDATA("samsung,exynos5250-tmu", 0x10060000,
 106                                 "exynos-tmu", NULL),
 107         {},
 108 };
 109
 110 static const struct of_dev_auxdata exynos5440_auxdata_lookup[] __initconst = {
 111         OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5440_PA_UART0,
 112                                 "exynos4210-uart.0", NULL),
 113         {},
 114 };
 115
 116 static void __init exynos5_dt_map_io(void)
 117 {
 118         unsigned long root = of_get_flat_dt_root();
 119
 120         exynos_init_io(NULL, 0);
 121
 122         if (of_flat_dt_is_compatible(root, "samsung,exynos5250"))
 123                 s3c24xx_init_clocks(24000000);
 124 }
 125
 126 static void __init exynos5_dt_machine_init(void)
 127 {
 128         struct device_node *i2c_np;
 129         const char *i2c_compat = "samsung,s3c2440-i2c";
 130         unsigned int tmp;
 131
 132         /*
 133          * Exynos5's legacy i2c controller and new high speed i2c
 134          * controller have muxed interrupt sources. By default the
 135          * interrupts for 4-channel HS-I2C controller are enabled.
 136          * If node for first four channels of legacy i2c controller
 137          * are available then re-configure the interrupts via the
 138          * system register.
 139          */
 140         for_each_compatible_node(i2c_np, NULL, i2c_compat) {
 141                 if (of_device_is_available(i2c_np)) {
 142                         if (of_alias_get_id(i2c_np, "i2c") < 4) {
 143                                 tmp = readl(EXYNOS5_SYS_I2C_CFG);
 144                                 writel(tmp & ~(0x1 << of_alias_get_id(i2c_np, "i2c")),
 145                                                 EXYNOS5_SYS_I2C_CFG);
 146                         }
 147                 }
 148         }
 149
 150         if (of_machine_is_compatible("samsung,exynos5250"))
 151                 of_platform_populate(NULL, of_default_bus_match_table,
 152                                      exynos5250_auxdata_lookup, NULL);
 153         else if (of_machine_is_compatible("samsung,exynos5440"))
 154                 of_platform_populate(NULL, of_default_bus_match_table,
 155                                      exynos5440_auxdata_lookup, NULL);
 156 }
 157
 158 static char const *exynos5_dt_compat[] __initdata = {
 159         "samsung,exynos5250",
 160         "samsung,exynos5440",
 161         NULL
 162 };
 163
 164 static void __init exynos5_reserve(void)
 165 {
 166 #ifdef CONFIG_S5P_DEV_MFC
 167         struct s5p_mfc_dt_meminfo mfc_mem;
 168
 169         /* Reserve memory for MFC only if it's available */
 170         mfc_mem.compatible = "samsung,mfc-v6";
 171         if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem))
 172                 s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff,
 173                                 mfc_mem.lsize);
 174 #endif
 175 }
 176
 177 DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
 178         /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
 179         .init_irq       = exynos5_init_irq,
 180         .smp            = smp_ops(exynos_smp_ops),
 181         .map_io         = exynos5_dt_map_io,
 182         .handle_irq     = gic_handle_irq,
 183         .init_machine   = exynos5_dt_machine_init,
 184         .init_late      = exynos_init_late,
 185         .timer          = &exynos4_timer,
 186         .dt_compat      = exynos5_dt_compat,
 187         .restart        = exynos5_restart,
 188         .reserve        = exynos5_reserve,
 189 MACHINE_END