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) 2009-2011 Florian Fainelli <florian@openwrt.org>
   7  * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
   8  */
   9
  10 #include <linux/init.h>
  11 #include <linux/kernel.h>
  12 #include <linux/export.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/err.h>
  15 #include <linux/clk.h>
  16
  17 #include <bcm63xx_cpu.h>
  18 #include <bcm63xx_dev_spi.h>
  19 #include <bcm63xx_regs.h>
  20
  21 /*
  22  * register offsets
  23  */
  24 static const unsigned long bcm6348_regs_spi[] = {
  25         __GEN_SPI_REGS_TABLE(6348)
  26 };
  27
  28 static const unsigned long bcm6358_regs_spi[] = {
  29         __GEN_SPI_REGS_TABLE(6358)
  30 };
  31
  32 const unsigned long *bcm63xx_regs_spi;
  33 EXPORT_SYMBOL(bcm63xx_regs_spi);
  34
  35 static __init void bcm63xx_spi_regs_init(void)
  36 {
  37         if (BCMCPU_IS_6338() || BCMCPU_IS_6348())
  38                 bcm63xx_regs_spi = bcm6348_regs_spi;
  39         if (BCMCPU_IS_3368() || BCMCPU_IS_6358() ||
  40                 BCMCPU_IS_6362() || BCMCPU_IS_6368())
  41                 bcm63xx_regs_spi = bcm6358_regs_spi;
  42 }
  43
  44 static struct resource spi_resources[] = {
  45         {
  46                 .start          = -1, /* filled at runtime */
  47                 .end            = -1, /* filled at runtime */
  48                 .flags          = IORESOURCE_MEM,
  49         },
  50         {
  51                 .start          = -1, /* filled at runtime */
  52                 .flags          = IORESOURCE_IRQ,
  53         },
  54 };
  55
  56 static struct bcm63xx_spi_pdata spi_pdata = {
  57         .bus_num                = 0,
  58         .num_chipselect         = 8,
  59 };
  60
  61 static struct platform_device bcm63xx_spi_device = {
  62         .name           = "bcm63xx-spi",
  63         .id             = -1,
  64         .num_resources  = ARRAY_SIZE(spi_resources),
  65         .resource       = spi_resources,
  66         .dev            = {
  67                 .platform_data = &spi_pdata,
  68         },
  69 };
  70
  71 int __init bcm63xx_spi_register(void)
  72 {
  73         if (BCMCPU_IS_6328() || BCMCPU_IS_6345())
  74                 return -ENODEV;
  75
  76         spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
  77         spi_resources[0].end = spi_resources[0].start;
  78         spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
  79
  80         if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) {
  81                 spi_resources[0].end += BCM_6348_RSET_SPI_SIZE - 1;
  82                 spi_pdata.fifo_size = SPI_6348_MSG_DATA_SIZE;
  83                 spi_pdata.msg_type_shift = SPI_6348_MSG_TYPE_SHIFT;
  84                 spi_pdata.msg_ctl_width = SPI_6348_MSG_CTL_WIDTH;
  85         }
  86
  87         if (BCMCPU_IS_3368() || BCMCPU_IS_6358() || BCMCPU_IS_6362() ||
  88                 BCMCPU_IS_6368()) {
  89                 spi_resources[0].end += BCM_6358_RSET_SPI_SIZE - 1;
  90                 spi_pdata.fifo_size = SPI_6358_MSG_DATA_SIZE;
  91                 spi_pdata.msg_type_shift = SPI_6358_MSG_TYPE_SHIFT;
  92                 spi_pdata.msg_ctl_width = SPI_6358_MSG_CTL_WIDTH;
  93         }
  94
  95         bcm63xx_spi_regs_init();
  96
  97         return platform_device_register(&bcm63xx_spi_device);
  98 }