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devices-common.c

/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
 * License terms: GNU General Public License (GPL), version 2.
 */

#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/amba/bus.h>

#include <plat/gpio.h>

#include <mach/hardware.h>

#include "devices-common.h"

struct amba_device *
dbx500_add_amba_device(const char *name, resource_size_t base,
                   int irq, void *pdata, unsigned int periphid)
{
      struct amba_device *dev;
      int ret;

      dev = kzalloc(sizeof *dev, GFP_KERNEL);
      if (!dev)
            return ERR_PTR(-ENOMEM);

      dev->dev.init_name = name;

      dev->res.start = base;
      dev->res.end = base + SZ_4K - 1;
      dev->res.flags = IORESOURCE_MEM;

      dev->dma_mask = DMA_BIT_MASK(32);
      dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);

      dev->irq[0] = irq;
      dev->irq[1] = NO_IRQ;

      dev->periphid = periphid;

      dev->dev.platform_data = pdata;

      ret = amba_device_register(dev, &iomem_resource);
      if (ret) {
            kfree(dev);
            return ERR_PTR(ret);
      }

      return dev;
}

static struct platform_device *
dbx500_add_platform_device(const char *name, int id, void *pdata,
                     struct resource *res, int resnum)
{
      struct platform_device *dev;
      int ret;

      dev = platform_device_alloc(name, id);
      if (!dev)
            return ERR_PTR(-ENOMEM);

      dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
      dev->dev.dma_mask = &dev->dev.coherent_dma_mask;

      ret = platform_device_add_resources(dev, res, resnum);
      if (ret)
            goto out_free;

      dev->dev.platform_data = pdata;

      ret = platform_device_add(dev);
      if (ret)
            goto out_free;

      return dev;

out_free:
      platform_device_put(dev);
      return ERR_PTR(ret);
}

struct platform_device *
dbx500_add_platform_device_4k1irq(const char *name, int id,
                          resource_size_t base,
                          int irq, void *pdata)
{
      struct resource resources[] = {
            [0] = {
                  .start      = base,
                  .end  = base + SZ_4K - 1,
                  .flags      = IORESOURCE_MEM,
            },
            [1] = {
                  .start      = irq,
                  .end  = irq,
                  .flags      = IORESOURCE_IRQ,
            }
      };

      return dbx500_add_platform_device(name, id, pdata, resources,
                                ARRAY_SIZE(resources));
}

static struct platform_device *
dbx500_add_gpio(int id, resource_size_t addr, int irq,
            struct nmk_gpio_platform_data *pdata)
{
      struct resource resources[] = {
            {
                  .start      = addr,
                  .end  = addr + 127,
                  .flags      = IORESOURCE_MEM,
            },
            {
                  .start      = irq,
                  .end  = irq,
                  .flags      = IORESOURCE_IRQ,
            }
      };

      return platform_device_register_resndata(NULL, "gpio", id,
                        resources, ARRAY_SIZE(resources),
                        pdata, sizeof(*pdata));
}

void dbx500_add_gpios(resource_size_t *base, int num, int irq,
                  struct nmk_gpio_platform_data *pdata)
{
      int first = 0;
      int i;

      for (i = 0; i < num; i++, first += 32, irq++) {
            pdata->first_gpio = first;
            pdata->first_irq = NOMADIK_GPIO_TO_IRQ(first);

            dbx500_add_gpio(i, base[i], irq, pdata);
      }
}

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