arch/arm/mach-ux500/devices-common.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2010
   3  *
   4  * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
   5  * License terms: GNU General Public License (GPL), version 2.
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/dma-mapping.h>
  10 #include <linux/err.h>
  11 #include <linux/irq.h>
  12 #include <linux/slab.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/amba/bus.h>
  15
  16 #include <plat/gpio.h>
  17
  18 #include <mach/hardware.h>
  19
  20 #include "devices-common.h"
  21
  22 struct amba_device *
  23 dbx500_add_amba_device(const char *name, resource_size_t base,
  24                        int irq, void *pdata, unsigned int periphid)
  25 {
  26         struct amba_device *dev;
  27         int ret;
  28
  29         dev = kzalloc(sizeof *dev, GFP_KERNEL);
  30         if (!dev)
  31                 return ERR_PTR(-ENOMEM);
  32
  33         dev->dev.init_name = name;
  34
  35         dev->res.start = base;
  36         dev->res.end = base + SZ_4K - 1;
  37         dev->res.flags = IORESOURCE_MEM;
  38
  39         dev->dma_mask = DMA_BIT_MASK(32);
  40         dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
  41
  42         dev->irq[0] = irq;
  43         dev->irq[1] = NO_IRQ;
  44
  45         dev->periphid = periphid;
  46
  47         dev->dev.platform_data = pdata;
  48
  49         ret = amba_device_register(dev, &iomem_resource);
  50         if (ret) {
  51                 kfree(dev);
  52                 return ERR_PTR(ret);
  53         }
  54
  55         return dev;
  56 }
  57
  58 static struct platform_device *
  59 dbx500_add_platform_device(const char *name, int id, void *pdata,
  60                            struct resource *res, int resnum)
  61 {
  62         struct platform_device *dev;
  63         int ret;
  64
  65         dev = platform_device_alloc(name, id);
  66         if (!dev)
  67                 return ERR_PTR(-ENOMEM);
  68
  69         dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
  70         dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
  71
  72         ret = platform_device_add_resources(dev, res, resnum);
  73         if (ret)
  74                 goto out_free;
  75
  76         dev->dev.platform_data = pdata;
  77
  78         ret = platform_device_add(dev);
  79         if (ret)
  80                 goto out_free;
  81
  82         return dev;
  83
  84 out_free:
  85         platform_device_put(dev);
  86         return ERR_PTR(ret);
  87 }
  88
  89 struct platform_device *
  90 dbx500_add_platform_device_4k1irq(const char *name, int id,
  91                                   resource_size_t base,
  92                                   int irq, void *pdata)
  93 {
  94         struct resource resources[] = {
  95                 [0] = {
  96                         .start  = base,
  97                         .end    = base + SZ_4K - 1,
  98                         .flags  = IORESOURCE_MEM,
  99                 },
 100                 [1] = {
 101                         .start  = irq,
 102                         .end    = irq,
 103                         .flags  = IORESOURCE_IRQ,
 104                 }
 105         };
 106
 107         return dbx500_add_platform_device(name, id, pdata, resources,
 108                                           ARRAY_SIZE(resources));
 109 }
 110
 111 static struct platform_device *
 112 dbx500_add_gpio(int id, resource_size_t addr, int irq,
 113                 struct nmk_gpio_platform_data *pdata)
 114 {
 115         struct resource resources[] = {
 116                 {
 117                         .start  = addr,
 118                         .end    = addr + 127,
 119                         .flags  = IORESOURCE_MEM,
 120                 },
 121                 {
 122                         .start  = irq,
 123                         .end    = irq,
 124                         .flags  = IORESOURCE_IRQ,
 125                 }
 126         };
 127
 128         return platform_device_register_resndata(NULL, "gpio", id,
 129                                 resources, ARRAY_SIZE(resources),
 130                                 pdata, sizeof(*pdata));
 131 }
 132
 133 void dbx500_add_gpios(resource_size_t *base, int num, int irq,
 134                       struct nmk_gpio_platform_data *pdata)
 135 {
 136         int first = 0;
 137         int i;
 138
 139         for (i = 0; i < num; i++, first += 32, irq++) {
 140                 pdata->first_gpio = first;
 141                 pdata->first_irq = NOMADIK_GPIO_TO_IRQ(first);
 142                 pdata->num_gpio = 32;
 143
 144                 dbx500_add_gpio(i, base[i], irq, pdata);
 145         }
 146 }