target/linux/brcm63xx/files/arch/mips/bcm63xx/dev-spi.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/kernel.h>
  11 #include <linux/platform_device.h>
  12
  13 #include <bcm63xx_cpu.h>
  14 #include <bcm63xx_dev_spi.h>
  15 #include <bcm63xx_regs.h>
  16
  17 static struct resource spi_resources[] = {
  18         {
  19                 .start          = -1, /* filled at runtime */
  20                 .end            = -1, /* filled at runtime */
  21                 .flags          = IORESOURCE_MEM,
  22         },
  23         {
  24                 .start          = -1, /* filled at runtime */
  25                 .flags          = IORESOURCE_IRQ,
  26         },
  27 };
  28
  29 static struct bcm63xx_spi_pdata spi_pdata = {
  30         .bus_num                = 0,
  31         .num_chipselect         = 4,
  32         .speed_hz               = 50000000,     /* Fclk */
  33 };
  34
  35 static struct platform_device bcm63xx_spi_device = {
  36         .name           = "bcm63xx_spi",
  37         .id             = 0,
  38         .num_resources  = ARRAY_SIZE(spi_resources),
  39         .resource       = spi_resources,
  40         .dev            = {
  41                 .platform_data = &spi_pdata,
  42         },
  43 };
  44
  45 int __init bcm63xx_spi_register(void)
  46 {
  47         spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
  48         spi_resources[0].end = spi_resources[0].start;
  49         spi_resources[0].end += RSET_SPI_SIZE - 1;
  50         spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
  51
  52         /* Fill in platform data */
  53         if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) {
  54                 spi_pdata.msg_fifo_size = SPI_BCM_6338_SPI_MSG_DATA_SIZE;
  55                 spi_pdata.rx_fifo_size = SPI_BCM_6338_SPI_RX_DATA_SIZE;
  56         }
  57
  58         if (BCMCPU_IS_6358()) {
  59                 spi_pdata.msg_fifo_size = SPI_BCM_6358_SPI_MSG_DATA_SIZE;
  60                 spi_pdata.rx_fifo_size =  SPI_BCM_6358_SPI_RX_DATA_SIZE;
  61         }
  62
  63         return platform_device_register(&bcm63xx_spi_device);
  64 }