arch/arm/mach-ixp4xx/fsg-setup.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * arch/arm/mach-ixp4xx/fsg-setup.c
   4  *
   5  * FSG board-setup
   6  *
   7  * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
   8  *
   9  * based on ixdp425-setup.c:
  10  *      Copyright (C) 2003-2004 MontaVista Software, Inc.
  11  * based on nslu2-power.c
  12  *      Copyright (C) 2005 Tower Technologies
  13  *
  14  * Author: Rod Whitby <rod@whitby.id.au>
  15  * Maintainers: http://www.nslu2-linux.org/
  16  *
  17  */
  18 #include <linux/gpio.h>
  19 #include <linux/if_ether.h>
  20 #include <linux/irq.h>
  21 #include <linux/serial.h>
  22 #include <linux/serial_8250.h>
  23 #include <linux/leds.h>
  24 #include <linux/reboot.h>
  25 #include <linux/i2c.h>
  26 #include <linux/gpio/machine.h>
  27 #include <linux/io.h>
  28 #include <asm/mach-types.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/flash.h>
  31 #include <mach/hardware.h>
  32
  33 #include "irqs.h"
  34
  35 #define FSG_SDA_PIN             12
  36 #define FSG_SCL_PIN             13
  37
  38 #define FSG_SB_GPIO             4       /* sync button */
  39 #define FSG_RB_GPIO             9       /* reset button */
  40 #define FSG_UB_GPIO             10      /* usb button */
  41
  42 static struct flash_platform_data fsg_flash_data = {
  43         .map_name               = "cfi_probe",
  44         .width                  = 2,
  45 };
  46
  47 static struct resource fsg_flash_resource = {
  48         .flags                  = IORESOURCE_MEM,
  49 };
  50
  51 static struct platform_device fsg_flash = {
  52         .name                   = "IXP4XX-Flash",
  53         .id                     = 0,
  54         .dev = {
  55                 .platform_data  = &fsg_flash_data,
  56         },
  57         .num_resources          = 1,
  58         .resource               = &fsg_flash_resource,
  59 };
  60
  61 static struct gpiod_lookup_table fsg_i2c_gpiod_table = {
  62         .dev_id         = "i2c-gpio.0",
  63         .table          = {
  64                 GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SDA_PIN,
  65                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
  66                 GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SCL_PIN,
  67                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
  68         },
  69 };
  70
  71 static struct platform_device fsg_i2c_gpio = {
  72         .name                   = "i2c-gpio",
  73         .id                     = 0,
  74         .dev = {
  75                 .platform_data  = NULL,
  76         },
  77 };
  78
  79 static struct i2c_board_info __initdata fsg_i2c_board_info [] = {
  80         {
  81                 I2C_BOARD_INFO("isl1208", 0x6f),
  82         },
  83 };
  84
  85 static struct resource fsg_uart_resources[] = {
  86         {
  87                 .start          = IXP4XX_UART1_BASE_PHYS,
  88                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
  89                 .flags          = IORESOURCE_MEM,
  90         },
  91         {
  92                 .start          = IXP4XX_UART2_BASE_PHYS,
  93                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  94                 .flags          = IORESOURCE_MEM,
  95         }
  96 };
  97
  98 static struct plat_serial8250_port fsg_uart_data[] = {
  99         {
 100                 .mapbase        = IXP4XX_UART1_BASE_PHYS,
 101                 .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
 102                 .irq            = IRQ_IXP4XX_UART1,
 103                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 104                 .iotype         = UPIO_MEM,
 105                 .regshift       = 2,
 106                 .uartclk        = IXP4XX_UART_XTAL,
 107         },
 108         {
 109                 .mapbase        = IXP4XX_UART2_BASE_PHYS,
 110                 .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
 111                 .irq            = IRQ_IXP4XX_UART2,
 112                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 113                 .iotype         = UPIO_MEM,
 114                 .regshift       = 2,
 115                 .uartclk        = IXP4XX_UART_XTAL,
 116         },
 117         { }
 118 };
 119
 120 static struct platform_device fsg_uart = {
 121         .name                   = "serial8250",
 122         .id                     = PLAT8250_DEV_PLATFORM,
 123         .dev = {
 124                 .platform_data  = fsg_uart_data,
 125         },
 126         .num_resources          = ARRAY_SIZE(fsg_uart_resources),
 127         .resource               = fsg_uart_resources,
 128 };
 129
 130 static struct platform_device fsg_leds = {
 131         .name           = "fsg-led",
 132         .id             = -1,
 133 };
 134
 135 /* Built-in 10/100 Ethernet MAC interfaces */
 136 static struct resource fsg_eth_npeb_resources[] = {
 137         {
 138                 .start          = IXP4XX_EthB_BASE_PHYS,
 139                 .end            = IXP4XX_EthB_BASE_PHYS + 0x0fff,
 140                 .flags          = IORESOURCE_MEM,
 141         },
 142 };
 143
 144 static struct resource fsg_eth_npec_resources[] = {
 145         {
 146                 .start          = IXP4XX_EthC_BASE_PHYS,
 147                 .end            = IXP4XX_EthC_BASE_PHYS + 0x0fff,
 148                 .flags          = IORESOURCE_MEM,
 149         },
 150 };
 151
 152 static struct eth_plat_info fsg_plat_eth[] = {
 153         {
 154                 .phy            = 5,
 155                 .rxq            = 3,
 156                 .txreadyq       = 20,
 157         }, {
 158                 .phy            = 4,
 159                 .rxq            = 4,
 160                 .txreadyq       = 21,
 161         }
 162 };
 163
 164 static struct platform_device fsg_eth[] = {
 165         {
 166                 .name                   = "ixp4xx_eth",
 167                 .id                     = IXP4XX_ETH_NPEB,
 168                 .dev = {
 169                         .platform_data  = fsg_plat_eth,
 170                 },
 171                 .num_resources  = ARRAY_SIZE(fsg_eth_npeb_resources),
 172                 .resource       = fsg_eth_npeb_resources,
 173         }, {
 174                 .name                   = "ixp4xx_eth",
 175                 .id                     = IXP4XX_ETH_NPEC,
 176                 .dev = {
 177                         .platform_data  = fsg_plat_eth + 1,
 178                 },
 179                 .num_resources  = ARRAY_SIZE(fsg_eth_npec_resources),
 180                 .resource       = fsg_eth_npec_resources,
 181         }
 182 };
 183
 184 static struct platform_device *fsg_devices[] __initdata = {
 185         &fsg_i2c_gpio,
 186         &fsg_flash,
 187         &fsg_leds,
 188         &fsg_eth[0],
 189         &fsg_eth[1],
 190 };
 191
 192 static irqreturn_t fsg_power_handler(int irq, void *dev_id)
 193 {
 194         /* Signal init to do the ctrlaltdel action, this will bypass init if
 195          * it hasn't started and do a kernel_restart.
 196          */
 197         ctrl_alt_del();
 198
 199         return IRQ_HANDLED;
 200 }
 201
 202 static irqreturn_t fsg_reset_handler(int irq, void *dev_id)
 203 {
 204         /* This is the paper-clip reset which does an emergency reboot. */
 205         printk(KERN_INFO "Restarting system.\n");
 206         machine_restart(NULL);
 207
 208         /* This should never be reached. */
 209         return IRQ_HANDLED;
 210 }
 211
 212 static void __init fsg_init(void)
 213 {
 214         uint8_t __iomem *f;
 215
 216         ixp4xx_sys_init();
 217
 218         fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 219         fsg_flash_resource.end =
 220                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 221
 222         *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
 223         *IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0;
 224
 225         /* Configure CS2 for operation, 8bit and writable */
 226         *IXP4XX_EXP_CS2 = 0xbfff0002;
 227
 228         gpiod_add_lookup_table(&fsg_i2c_gpiod_table);
 229         i2c_register_board_info(0, fsg_i2c_board_info,
 230                                 ARRAY_SIZE(fsg_i2c_board_info));
 231
 232         /* This is only useful on a modified machine, but it is valuable
 233          * to have it first in order to see debug messages, and so that
 234          * it does *not* get removed if platform_add_devices fails!
 235          */
 236         (void)platform_device_register(&fsg_uart);
 237
 238         platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices));
 239
 240         if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler,
 241                         IRQF_TRIGGER_LOW, "FSG reset button", NULL) < 0) {
 242
 243                 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
 244                         gpio_to_irq(FSG_RB_GPIO));
 245         }
 246
 247         if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler,
 248                         IRQF_TRIGGER_LOW, "FSG power button", NULL) < 0) {
 249
 250                 printk(KERN_DEBUG "Power Button IRQ %d not available\n",
 251                         gpio_to_irq(FSG_SB_GPIO));
 252         }
 253
 254         /*
 255          * Map in a portion of the flash and read the MAC addresses.
 256          * Since it is stored in BE in the flash itself, we need to
 257          * byteswap it if we're in LE mode.
 258          */
 259         f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000);
 260         if (f) {
 261 #ifdef __ARMEB__
 262                 int i;
 263                 for (i = 0; i < 6; i++) {
 264                         fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i);
 265                         fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i);
 266                 }
 267 #else
 268
 269                 /*
 270                   Endian-swapped reads from unaligned addresses are
 271                   required to extract the two MACs from the big-endian
 272                   Redboot config area in flash.
 273                 */
 274
 275                 fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421);
 276                 fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420);
 277                 fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427);
 278                 fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426);
 279                 fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425);
 280                 fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424);
 281
 282                 fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439);
 283                 fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F);
 284                 fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E);
 285                 fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D);
 286                 fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C);
 287                 fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443);
 288 #endif
 289                 iounmap(f);
 290         }
 291         printk(KERN_INFO "FSG: Using MAC address %pM for port 0\n",
 292                fsg_plat_eth[0].hwaddr);
 293         printk(KERN_INFO "FSG: Using MAC address %pM for port 1\n",
 294                fsg_plat_eth[1].hwaddr);
 295
 296 }
 297
 298 MACHINE_START(FSG, "Freecom FSG-3")
 299         /* Maintainer: www.nslu2-linux.org */
 300         .map_io         = ixp4xx_map_io,
 301         .init_early     = ixp4xx_init_early,
 302         .init_irq       = ixp4xx_init_irq,
 303         .init_time      = ixp4xx_timer_init,
 304         .atag_offset    = 0x100,
 305         .init_machine   = fsg_init,
 306 #if defined(CONFIG_PCI)
 307         .dma_zone_size  = SZ_64M,
 308 #endif
 309         .restart        = ixp4xx_restart,
 310 MACHINE_END
 311