arch/arm/mach-iop32x/em7210.c

   1 /*
   2  * arch/arm/mach-iop32x/em7210.c
   3  *
   4  * Board support code for the Lanner EM7210 platforms.
   5  *
   6  * Based on arch/arm/mach-iop32x/iq31244.c file.
   7  *
   8  * Copyright (C) 2007 Arnaud Patard <arnaud.patard@rtp-net.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  */
  15
  16 #include <linux/mm.h>
  17 #include <linux/init.h>
  18 #include <linux/kernel.h>
  19 #include <linux/pci.h>
  20 #include <linux/pm.h>
  21 #include <linux/serial_core.h>
  22 #include <linux/serial_8250.h>
  23 #include <linux/mtd/physmap.h>
  24 #include <linux/platform_device.h>
  25 #include <asm/hardware.h>
  26 #include <linux/io.h>
  27 #include <linux/irq.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30 #include <asm/mach/pci.h>
  31 #include <asm/mach/time.h>
  32 #include <asm/mach-types.h>
  33 #include <asm/arch/time.h>
  34
  35 static void __init em7210_timer_init(void)
  36 {
  37         /* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
  38         /* 33.333 MHz crystal.                                */
  39         iop_init_time(200000000);
  40 }
  41
  42 static struct sys_timer em7210_timer = {
  43         .init           = em7210_timer_init,
  44         .offset         = iop_gettimeoffset,
  45 };
  46
  47
  48 /*
  49  * EM7210 I/O
  50  */
  51 static struct map_desc em7210_io_desc[] __initdata = {
  52         {       /* on-board devices */
  53                 .virtual        = IQ31244_UART,
  54                 .pfn            = __phys_to_pfn(IQ31244_UART),
  55                 .length         = 0x00100000,
  56                 .type           = MT_DEVICE,
  57         },
  58 };
  59
  60 void __init em7210_map_io(void)
  61 {
  62         iop3xx_map_io();
  63         iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
  64 }
  65
  66
  67 /*
  68  * EM7210 PCI
  69  */
  70 #define INTA    IRQ_IOP32X_XINT0
  71 #define INTB    IRQ_IOP32X_XINT1
  72 #define INTC    IRQ_IOP32X_XINT2
  73 #define INTD    IRQ_IOP32X_XINT3
  74
  75 static int __init
  76 em7210_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  77 {
  78         static int pci_irq_table[][4] = {
  79                 /*
  80                  * PCI IDSEL/INTPIN->INTLINE
  81                  * A       B       C       D
  82                  */
  83                 {INTB, INTB, INTB, INTB}, /* console / uart */
  84                 {INTA, INTA, INTA, INTA}, /* 1st 82541      */
  85                 {INTD, INTD, INTD, INTD}, /* 2nd 82541      */
  86                 {INTC, INTC, INTC, INTC}, /* GD31244        */
  87                 {INTD, INTA, INTA, INTA}, /* mini-PCI       */
  88                 {INTD, INTC, INTA, INTA}, /* NEC USB        */
  89         };
  90
  91         if (pin < 1 || pin > 4)
  92                 return -1;
  93
  94         return pci_irq_table[slot % 6][pin - 1];
  95 }
  96
  97 static struct hw_pci em7210_pci __initdata = {
  98         .swizzle        = pci_std_swizzle,
  99         .nr_controllers = 1,
 100         .setup          = iop3xx_pci_setup,
 101         .preinit        = iop3xx_pci_preinit,
 102         .scan           = iop3xx_pci_scan_bus,
 103         .map_irq        = em7210_pci_map_irq,
 104 };
 105
 106 static int __init em7210_pci_init(void)
 107 {
 108         if (machine_is_em7210())
 109                 pci_common_init(&em7210_pci);
 110
 111         return 0;
 112 }
 113
 114 subsys_initcall(em7210_pci_init);
 115
 116
 117 /*
 118  * EM7210 Flash
 119  */
 120 static struct physmap_flash_data em7210_flash_data = {
 121         .width          = 2,
 122 };
 123
 124 static struct resource em7210_flash_resource = {
 125         .start          = 0xf0000000,
 126         .end            = 0xf1ffffff,
 127         .flags          = IORESOURCE_MEM,
 128 };
 129
 130 static struct platform_device em7210_flash_device = {
 131         .name           = "physmap-flash",
 132         .id             = 0,
 133         .dev            = {
 134                 .platform_data  = &em7210_flash_data,
 135         },
 136         .num_resources  = 1,
 137         .resource       = &em7210_flash_resource,
 138 };
 139
 140
 141 /*
 142  * EM7210 UART
 143  * The physical address of the serial port is 0xfe800000,
 144  * so it can be used for physical and virtual address.
 145  */
 146 static struct plat_serial8250_port em7210_serial_port[] = {
 147         {
 148                 .mapbase        = IQ31244_UART,
 149                 .membase        = (char *)IQ31244_UART,
 150                 .irq            = IRQ_IOP32X_XINT1,
 151                 .flags          = UPF_SKIP_TEST,
 152                 .iotype         = UPIO_MEM,
 153                 .regshift       = 0,
 154                 .uartclk        = 1843200,
 155         },
 156         { },
 157 };
 158
 159 static struct resource em7210_uart_resource = {
 160         .start          = IQ31244_UART,
 161         .end            = IQ31244_UART + 7,
 162         .flags          = IORESOURCE_MEM,
 163 };
 164
 165 static struct platform_device em7210_serial_device = {
 166         .name           = "serial8250",
 167         .id             = PLAT8250_DEV_PLATFORM,
 168         .dev            = {
 169                 .platform_data          = em7210_serial_port,
 170         },
 171         .num_resources  = 1,
 172         .resource       = &em7210_uart_resource,
 173 };
 174
 175 void em7210_power_off(void)
 176 {
 177         *IOP3XX_GPOE &= 0xfe;
 178         *IOP3XX_GPOD |= 0x01;
 179 }
 180
 181 static void __init em7210_init_machine(void)
 182 {
 183         platform_device_register(&em7210_serial_device);
 184         platform_device_register(&iop3xx_i2c0_device);
 185         platform_device_register(&iop3xx_i2c1_device);
 186         platform_device_register(&em7210_flash_device);
 187         platform_device_register(&iop3xx_dma_0_channel);
 188         platform_device_register(&iop3xx_dma_1_channel);
 189
 190
 191         pm_power_off = em7210_power_off;
 192 }
 193
 194 MACHINE_START(EM7210, "Lanner EM7210")
 195         .phys_io        = IQ31244_UART,
 196         .io_pg_offst    = ((IQ31244_UART) >> 18) & 0xfffc,
 197         .boot_params    = 0xa0000100,
 198         .map_io         = em7210_map_io,
 199         .init_irq       = iop32x_init_irq,
 200         .timer          = &em7210_timer,
 201         .init_machine   = em7210_init_machine,
 202 MACHINE_END