arch/xtensa/platforms/s6105/device.c

   1 /*
   2  * s6105 platform devices
   3  *
   4  * Copyright (c) 2009 emlix GmbH
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/gpio.h>
   9 #include <linux/init.h>
  10 #include <linux/irq.h>
  11 #include <linux/phy.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/serial.h>
  14 #include <linux/serial_8250.h>
  15
  16 #include <variant/hardware.h>
  17 #include <variant/dmac.h>
  18
  19 #include <platform/gpio.h>
  20
  21 #define GPIO3_INTNUM            3
  22 #define UART_INTNUM             4
  23 #define GMAC_INTNUM             5
  24
  25 static const signed char gpio3_irq_mappings[] = {
  26         S6_INTC_GPIO(3),
  27         -1
  28 };
  29
  30 static const signed char uart_irq_mappings[] = {
  31         S6_INTC_UART(0),
  32         S6_INTC_UART(1),
  33         -1,
  34 };
  35
  36 static const signed char gmac_irq_mappings[] = {
  37         S6_INTC_GMAC_STAT,
  38         S6_INTC_GMAC_ERR,
  39         S6_INTC_DMA_HOSTTERMCNT(0),
  40         S6_INTC_DMA_HOSTTERMCNT(1),
  41         -1
  42 };
  43
  44 const signed char *platform_irq_mappings[NR_IRQS] = {
  45         [GPIO3_INTNUM] = gpio3_irq_mappings,
  46         [UART_INTNUM] = uart_irq_mappings,
  47         [GMAC_INTNUM] = gmac_irq_mappings,
  48 };
  49
  50 static struct plat_serial8250_port serial_platform_data[] = {
  51         {
  52                 .membase = (void *)S6_REG_UART + 0x0000,
  53                 .mapbase = S6_REG_UART + 0x0000,
  54                 .irq = UART_INTNUM,
  55                 .uartclk = S6_SCLK,
  56                 .regshift = 2,
  57                 .iotype = SERIAL_IO_MEM,
  58                 .flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST,
  59         },
  60         {
  61                 .membase = (void *)S6_REG_UART + 0x1000,
  62                 .mapbase = S6_REG_UART + 0x1000,
  63                 .irq = UART_INTNUM,
  64                 .uartclk = S6_SCLK,
  65                 .regshift = 2,
  66                 .iotype = SERIAL_IO_MEM,
  67                 .flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST,
  68         },
  69         { },
  70 };
  71
  72 static struct resource s6_gmac_resource[] = {
  73         {
  74                 .name   = "mem",
  75                 .start  = (resource_size_t)S6_REG_GMAC,
  76                 .end    = (resource_size_t)S6_REG_GMAC + 0x10000 - 1,
  77                 .flags  = IORESOURCE_MEM,
  78         },
  79         {
  80                 .name   = "dma",
  81                 .start  = (resource_size_t)
  82                         DMA_CHNL(S6_REG_HIFDMA, S6_HIFDMA_GMACTX),
  83                 .end    = (resource_size_t)
  84                         DMA_CHNL(S6_REG_HIFDMA, S6_HIFDMA_GMACTX) + 0x100 - 1,
  85                 .flags  = IORESOURCE_DMA,
  86         },
  87         {
  88                 .name   = "dma",
  89                 .start  = (resource_size_t)
  90                         DMA_CHNL(S6_REG_HIFDMA, S6_HIFDMA_GMACRX),
  91                 .end    = (resource_size_t)
  92                         DMA_CHNL(S6_REG_HIFDMA, S6_HIFDMA_GMACRX) + 0x100 - 1,
  93                 .flags  = IORESOURCE_DMA,
  94         },
  95         {
  96                 .name   = "io",
  97                 .start  = (resource_size_t)S6_MEM_GMAC,
  98                 .end    = (resource_size_t)S6_MEM_GMAC + 0x2000000 - 1,
  99                 .flags  = IORESOURCE_IO,
 100         },
 101         {
 102                 .name   = "irq",
 103                 .start  = (resource_size_t)GMAC_INTNUM,
 104                 .flags  = IORESOURCE_IRQ,
 105         },
 106         {
 107                 .name   = "irq",
 108                 .start  = (resource_size_t)PHY_POLL,
 109                 .flags  = IORESOURCE_IRQ,
 110         },
 111 };
 112
 113 static int __init prepare_phy_irq(int pin)
 114 {
 115         int irq;
 116         if (gpio_request(pin, "s6gmac_phy") < 0)
 117                 goto fail;
 118         if (gpio_direction_input(pin) < 0)
 119                 goto free;
 120         irq = gpio_to_irq(pin);
 121         if (irq < 0)
 122                 goto free;
 123         if (irq_set_irq_type(irq, IRQ_TYPE_LEVEL_LOW) < 0)
 124                 goto free;
 125         return irq;
 126 free:
 127         gpio_free(pin);
 128 fail:
 129         return PHY_POLL;
 130 }
 131
 132 static struct platform_device platform_devices[] = {
 133         {
 134                 .name = "serial8250",
 135                 .id = PLAT8250_DEV_PLATFORM,
 136                 .dev = {
 137                         .platform_data = serial_platform_data,
 138                 },
 139         },
 140         {
 141                 .name = "s6gmac",
 142                 .id = 0,
 143                 .resource = s6_gmac_resource,
 144                 .num_resources = ARRAY_SIZE(s6_gmac_resource),
 145         },
 146         {
 147                 I2C_BOARD_INFO("m41t62", S6I2C_ADDR_M41T62),
 148         },
 149 };
 150
 151 static int __init device_init(void)
 152 {
 153         int i;
 154
 155         s6_gmac_resource[5].start = prepare_phy_irq(GPIO_PHY_IRQ);
 156
 157         for (i = 0; i < ARRAY_SIZE(platform_devices); i++)
 158                 platform_device_register(&platform_devices[i]);
 159         return 0;
 160 }
 161 arch_initcall_sync(device_init);