target/linux/brcm63xx/files/arch/mips/bcm63xx/dev-pcmcia.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) 2008 Maxime Bizon <mbizon@freebox.fr>
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/kernel.h>
  11 #include <asm/bootinfo.h>
  12 #include <linux/platform_device.h>
  13 #include <bcm63xx_cs.h>
  14 #include <bcm63xx_cpu.h>
  15 #include <bcm63xx_dev_pcmcia.h>
  16 #include <bcm63xx_io.h>
  17 #include <bcm63xx_regs.h>
  18
  19 static struct resource pcmcia_resources[] = {
  20         /* pcmcia registers */
  21         {
  22                 .start          = -1, /* filled at runtime */
  23                 .end            = -1, /* filled at runtime */
  24                 .flags          = IORESOURCE_MEM,
  25         },
  26
  27         /* pcmcia memory zone resources */
  28         {
  29                 .start          = BCM_PCMCIA_COMMON_BASE_PA,
  30                 .end            = BCM_PCMCIA_COMMON_END_PA,
  31                 .flags          = IORESOURCE_MEM,
  32         },
  33         {
  34                 .start          = BCM_PCMCIA_ATTR_BASE_PA,
  35                 .end            = BCM_PCMCIA_ATTR_END_PA,
  36                 .flags          = IORESOURCE_MEM,
  37         },
  38         {
  39                 .start          = BCM_PCMCIA_IO_BASE_PA,
  40                 .end            = BCM_PCMCIA_IO_END_PA,
  41                 .flags          = IORESOURCE_MEM,
  42         },
  43
  44         /* PCMCIA irq */
  45         {
  46                 .start          = -1, /* filled at runtime */
  47                 .flags          = IORESOURCE_IRQ,
  48         },
  49
  50         /* declare PCMCIA IO resource also */
  51         {
  52                 .start          = BCM_PCMCIA_IO_BASE_PA,
  53                 .end            = BCM_PCMCIA_IO_END_PA,
  54                 .flags          = IORESOURCE_IO,
  55         },
  56 };
  57
  58 static struct bcm63xx_pcmcia_platform_data pd;
  59
  60 static struct platform_device bcm63xx_pcmcia_device = {
  61         .name           = "bcm63xx_pcmcia",
  62         .id             = 0,
  63         .num_resources  = ARRAY_SIZE(pcmcia_resources),
  64         .resource       = pcmcia_resources,
  65         .dev            = {
  66                 .platform_data = &pd,
  67         },
  68 };
  69
  70 static int __init config_pcmcia_cs(unsigned int cs,
  71                                    u32 base, unsigned int size)
  72 {
  73         int ret;
  74
  75         ret = bcm63xx_set_cs_status(cs, 0);
  76         if (!ret)
  77                 ret = bcm63xx_set_cs_base(cs, base, size);
  78         if (!ret)
  79                 ret = bcm63xx_set_cs_status(cs, 1);
  80         return ret;
  81 }
  82
  83 static const __initdata unsigned int pcmcia_cs[3][3] = {
  84         /* cs, base address, size */
  85         { MPI_CS_PCMCIA_COMMON, BCM_PCMCIA_COMMON_BASE_PA,
  86           BCM_PCMCIA_COMMON_SIZE },
  87
  88         { MPI_CS_PCMCIA_ATTR, BCM_PCMCIA_ATTR_BASE_PA,
  89           BCM_PCMCIA_ATTR_SIZE },
  90
  91         { MPI_CS_PCMCIA_IO, BCM_PCMCIA_IO_BASE_PA,
  92           BCM_PCMCIA_IO_SIZE },
  93 };
  94
  95 int __init bcm63xx_pcmcia_register(void)
  96 {
  97         int ret, i;
  98
  99         if (!BCMCPU_IS_6348() && !BCMCPU_IS_6358())
 100                 return 0;
 101
 102         /* use correct pcmcia ready gpio depending on processor */
 103         switch (bcm63xx_get_cpu_id()) {
 104         case BCM6348_CPU_ID:
 105                 pd.ready_gpio = 22;
 106                 break;
 107
 108         case BCM6358_CPU_ID:
 109                 pd.ready_gpio = 22;
 110                 break;
 111
 112         default:
 113                 return -ENODEV;
 114         }
 115
 116         pcmcia_resources[0].start = bcm63xx_regset_address(RSET_PCMCIA);
 117         pcmcia_resources[0].end = pcmcia_resources[0].start;
 118         pcmcia_resources[0].end += RSET_PCMCIA_SIZE - 1;
 119         pcmcia_resources[4].start = bcm63xx_get_irq_number(IRQ_PCMCIA);
 120
 121         /* configure pcmcia chip selects */
 122         for (i = 0; i < 3; i++) {
 123                 ret = config_pcmcia_cs(pcmcia_cs[i][0],
 124                                        pcmcia_cs[i][1],
 125                                        pcmcia_cs[i][2]);
 126                 if (ret)
 127                         goto out_err;
 128         }
 129
 130         return platform_device_register(&bcm63xx_pcmcia_device);
 131
 132 out_err:
 133         printk(KERN_ERR "unable to set pcmcia chip select");
 134         return ret;
 135 }