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 #ifdef BCMCPU_RUNTIME_DETECT
  22 /*
  23  * register offsets
  24  */
  25 static const unsigned long bcm6348_regs_spi[] = {
  26         __GEN_SPI_REGS_TABLE(6348)
  27 };
  28
  29 static const unsigned long bcm6358_regs_spi[] = {
  30         __GEN_SPI_REGS_TABLE(6358)
  31 };
  32
  33 const unsigned long *bcm63xx_regs_spi;
  34 EXPORT_SYMBOL(bcm63xx_regs_spi);
  35
  36 static __init void bcm63xx_spi_regs_init(void)
  37 {
  38         if (BCMCPU_IS_6338() || BCMCPU_IS_6348())
  39                 bcm63xx_regs_spi = bcm6348_regs_spi;
  40         if (BCMCPU_IS_6358() || BCMCPU_IS_6362() || BCMCPU_IS_6368())
  41                 bcm63xx_regs_spi = bcm6358_regs_spi;
  42 }
  43 #else
  44 static __init void bcm63xx_spi_regs_init(void) { }
  45 #endif
  46
  47 static struct resource spi_resources[] = {
  48         {
  49                 .start          = -1, /* filled at runtime */
  50                 .end            = -1, /* filled at runtime */
  51                 .flags          = IORESOURCE_MEM,
  52         },
  53         {
  54                 .start          = -1, /* filled at runtime */
  55                 .flags          = IORESOURCE_IRQ,
  56         },
  57 };
  58
  59 static struct bcm63xx_spi_pdata spi_pdata = {
  60         .bus_num                = 0,
  61         .num_chipselect         = 8,
  62 };
  63
  64 static struct platform_device bcm63xx_spi_device = {
  65         .name           = "bcm63xx-spi",
  66         .id             = -1,
  67         .num_resources  = ARRAY_SIZE(spi_resources),
  68         .resource       = spi_resources,
  69         .dev            = {
  70                 .platform_data = &spi_pdata,
  71         },
  72 };
  73
  74 int __init bcm63xx_spi_register(void)
  75 {
  76         if (BCMCPU_IS_6328() || BCMCPU_IS_6345())
  77                 return -ENODEV;
  78
  79         spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
  80         spi_resources[0].end = spi_resources[0].start;
  81         spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
  82
  83         if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) {
  84                 spi_resources[0].end += BCM_6348_RSET_SPI_SIZE - 1;
  85                 spi_pdata.fifo_size = SPI_6348_MSG_DATA_SIZE;
  86                 spi_pdata.msg_type_shift = SPI_6348_MSG_TYPE_SHIFT;
  87                 spi_pdata.msg_ctl_width = SPI_6348_MSG_CTL_WIDTH;
  88         }
  89
  90         if (BCMCPU_IS_6358() || BCMCPU_IS_6362() || BCMCPU_IS_6368()) {
  91                 spi_resources[0].end += BCM_6358_RSET_SPI_SIZE - 1;
  92                 spi_pdata.fifo_size = SPI_6358_MSG_DATA_SIZE;
  93                 spi_pdata.msg_type_shift = SPI_6358_MSG_TYPE_SHIFT;
  94                 spi_pdata.msg_ctl_width = SPI_6358_MSG_CTL_WIDTH;
  95         }
  96
  97         bcm63xx_spi_regs_init();
  98
  99         return platform_device_register(&bcm63xx_spi_device);
 100 }