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generic.c

/*
 *  linux/arch/arm/mach-pxa/generic.c
 *
 *  Author: Nicolas Pitre
 *  Created:      Jun 15, 2001
 *  Copyright:    MontaVista Software Inc.
 *
 * Code common to all PXA machines.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Since this file should be linked before any other machine specific file,
 * the __initcall() here will be executed first.  This serves as default
 * initialization stuff for PXA machines which can be overridden later if
 * need be.
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <linux/pm.h>
#include <linux/string.h>

#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/mach/map.h>

#include <asm/arch/pxa-regs.h>
#include <asm/arch/gpio.h>
#include <asm/arch/udc.h>
#include <asm/arch/pxafb.h>
#include <asm/arch/mmc.h>
#include <asm/arch/irda.h>
#include <asm/arch/i2c.h>

#include "devices.h"
#include "generic.h"

/*
 * Get the clock frequency as reflected by CCCR and the turbo flag.
 * We assume these values have been applied via a fcs.
 * If info is not 0 we also display the current settings.
 */
unsigned int get_clk_frequency_khz(int info)
{
      if (cpu_is_pxa21x() || cpu_is_pxa25x())
            return pxa25x_get_clk_frequency_khz(info);
      else if (cpu_is_pxa27x())
            return pxa27x_get_clk_frequency_khz(info);
      else
            return pxa3xx_get_clk_frequency_khz(info);
}
EXPORT_SYMBOL(get_clk_frequency_khz);

/*
 * Return the current memory clock frequency in units of 10kHz
 */
unsigned int get_memclk_frequency_10khz(void)
{
      if (cpu_is_pxa21x() || cpu_is_pxa25x())
            return pxa25x_get_memclk_frequency_10khz();
      else if (cpu_is_pxa27x())
            return pxa27x_get_memclk_frequency_10khz();
      else
            return pxa3xx_get_memclk_frequency_10khz();
}
EXPORT_SYMBOL(get_memclk_frequency_10khz);

/*
 * Handy function to set GPIO alternate functions
 */
int pxa_last_gpio;

int pxa_gpio_mode(int gpio_mode)
{
      unsigned long flags;
      int gpio = gpio_mode & GPIO_MD_MASK_NR;
      int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8;
      int gafr;

      if (gpio > pxa_last_gpio)
            return -EINVAL;

      local_irq_save(flags);
      if (gpio_mode & GPIO_DFLT_LOW)
            GPCR(gpio) = GPIO_bit(gpio);
      else if (gpio_mode & GPIO_DFLT_HIGH)
            GPSR(gpio) = GPIO_bit(gpio);
      if (gpio_mode & GPIO_MD_MASK_DIR)
            GPDR(gpio) |= GPIO_bit(gpio);
      else
            GPDR(gpio) &= ~GPIO_bit(gpio);
      gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2));
      GAFR(gpio) = gafr |  (fn  << (((gpio) & 0xf)*2));
      local_irq_restore(flags);

      return 0;
}

EXPORT_SYMBOL(pxa_gpio_mode);

int gpio_direction_input(unsigned gpio)
{
      unsigned long flags;
      u32 mask;

      if (gpio > pxa_last_gpio)
            return -EINVAL;

      mask = GPIO_bit(gpio);
      local_irq_save(flags);
      GPDR(gpio) &= ~mask;
      local_irq_restore(flags);

      return 0;
}
EXPORT_SYMBOL(gpio_direction_input);

int gpio_direction_output(unsigned gpio, int value)
{
      unsigned long flags;
      u32 mask;

      if (gpio > pxa_last_gpio)
            return -EINVAL;

      mask = GPIO_bit(gpio);
      local_irq_save(flags);
      if (value)
            GPSR(gpio) = mask;
      else
            GPCR(gpio) = mask;
      GPDR(gpio) |= mask;
      local_irq_restore(flags);

      return 0;
}
EXPORT_SYMBOL(gpio_direction_output);

/*
 * Return GPIO level
 */
int pxa_gpio_get_value(unsigned gpio)
{
      return __gpio_get_value(gpio);
}

EXPORT_SYMBOL(pxa_gpio_get_value);

/*
 * Set output GPIO level
 */
void pxa_gpio_set_value(unsigned gpio, int value)
{
      __gpio_set_value(gpio, value);
}

EXPORT_SYMBOL(pxa_gpio_set_value);

/*
 * Routine to safely enable or disable a clock in the CKEN
 */
void __pxa_set_cken(int clock, int enable)
{
      unsigned long flags;
      local_irq_save(flags);

      if (enable)
            CKEN |= (1 << clock);
      else
            CKEN &= ~(1 << clock);

      local_irq_restore(flags);
}

EXPORT_SYMBOL(__pxa_set_cken);

/*
 * Intel PXA2xx internal register mapping.
 *
 * Note 1: not all PXA2xx variants implement all those addresses.
 *
 * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
 *         and cache flush area.
 */
static struct map_desc standard_io_desc[] __initdata = {
      {     /* Devs */
            .virtual    =  0xf2000000,
            .pfn        = __phys_to_pfn(0x40000000),
            .length           = 0x02000000,
            .type       = MT_DEVICE
      }, {  /* LCD */
            .virtual    =  0xf4000000,
            .pfn        = __phys_to_pfn(0x44000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }, {  /* Mem Ctl */
            .virtual    =  0xf6000000,
            .pfn        = __phys_to_pfn(0x48000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }, {  /* USB host */
            .virtual    =  0xf8000000,
            .pfn        = __phys_to_pfn(0x4c000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }, {  /* Camera */
            .virtual    =  0xfa000000,
            .pfn        = __phys_to_pfn(0x50000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }, {  /* IMem ctl */
            .virtual    =  0xfe000000,
            .pfn        = __phys_to_pfn(0x58000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }, {  /* UNCACHED_PHYS_0 */
            .virtual    = 0xff000000,
            .pfn        = __phys_to_pfn(0x00000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }
};

void __init pxa_map_io(void)
{
      iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
      get_clk_frequency_khz(1);
}


static struct resource pxamci_resources[] = {
      [0] = {
            .start      = 0x41100000,
            .end  = 0x41100fff,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = IRQ_MMC,
            .end  = IRQ_MMC,
            .flags      = IORESOURCE_IRQ,
      },
};

static u64 pxamci_dmamask = 0xffffffffUL;

struct platform_device pxa_device_mci = {
      .name       = "pxa2xx-mci",
      .id         = -1,
      .dev        = {
            .dma_mask = &pxamci_dmamask,
            .coherent_dma_mask = 0xffffffff,
      },
      .num_resources    = ARRAY_SIZE(pxamci_resources),
      .resource   = pxamci_resources,
};

void __init pxa_set_mci_info(struct pxamci_platform_data *info)
{
      pxa_device_mci.dev.platform_data = info;
}


static struct pxa2xx_udc_mach_info pxa_udc_info;

void __init pxa_set_udc_info(struct pxa2xx_udc_mach_info *info)
{
      memcpy(&pxa_udc_info, info, sizeof *info);
}

static struct resource pxa2xx_udc_resources[] = {
      [0] = {
            .start      = 0x40600000,
            .end  = 0x4060ffff,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = IRQ_USB,
            .end  = IRQ_USB,
            .flags      = IORESOURCE_IRQ,
      },
};

static u64 udc_dma_mask = ~(u32)0;

struct platform_device pxa_device_udc = {
      .name       = "pxa2xx-udc",
      .id         = -1,
      .resource   = pxa2xx_udc_resources,
      .num_resources    = ARRAY_SIZE(pxa2xx_udc_resources),
      .dev        =  {
            .platform_data    = &pxa_udc_info,
            .dma_mask   = &udc_dma_mask,
      }
};

static struct resource pxafb_resources[] = {
      [0] = {
            .start      = 0x44000000,
            .end  = 0x4400ffff,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = IRQ_LCD,
            .end  = IRQ_LCD,
            .flags      = IORESOURCE_IRQ,
      },
};

static u64 fb_dma_mask = ~(u64)0;

struct platform_device pxa_device_fb = {
      .name       = "pxa2xx-fb",
      .id         = -1,
      .dev        = {
            .dma_mask   = &fb_dma_mask,
            .coherent_dma_mask = 0xffffffff,
      },
      .num_resources    = ARRAY_SIZE(pxafb_resources),
      .resource   = pxafb_resources,
};

void __init set_pxa_fb_info(struct pxafb_mach_info *info)
{
      pxa_device_fb.dev.platform_data = info;
}

void __init set_pxa_fb_parent(struct device *parent_dev)
{
      pxa_device_fb.dev.parent = parent_dev;
}

static struct resource pxa_resource_ffuart[] = {
      {
            .start      = __PREG(FFUART),
            .end  = __PREG(FFUART) + 35,
            .flags      = IORESOURCE_MEM,
      }, {
            .start      = IRQ_FFUART,
            .end  = IRQ_FFUART,
            .flags      = IORESOURCE_IRQ,
      }
};

struct platform_device pxa_device_ffuart= {
      .name       = "pxa2xx-uart",
      .id         = 0,
      .resource   = pxa_resource_ffuart,
      .num_resources    = ARRAY_SIZE(pxa_resource_ffuart),
};

static struct resource pxa_resource_btuart[] = {
      {
            .start      = __PREG(BTUART),
            .end  = __PREG(BTUART) + 35,
            .flags      = IORESOURCE_MEM,
      }, {
            .start      = IRQ_BTUART,
            .end  = IRQ_BTUART,
            .flags      = IORESOURCE_IRQ,
      }
};

struct platform_device pxa_device_btuart = {
      .name       = "pxa2xx-uart",
      .id         = 1,
      .resource   = pxa_resource_btuart,
      .num_resources    = ARRAY_SIZE(pxa_resource_btuart),
};

static struct resource pxa_resource_stuart[] = {
      {
            .start      = __PREG(STUART),
            .end  = __PREG(STUART) + 35,
            .flags      = IORESOURCE_MEM,
      }, {
            .start      = IRQ_STUART,
            .end  = IRQ_STUART,
            .flags      = IORESOURCE_IRQ,
      }
};

struct platform_device pxa_device_stuart = {
      .name       = "pxa2xx-uart",
      .id         = 2,
      .resource   = pxa_resource_stuart,
      .num_resources    = ARRAY_SIZE(pxa_resource_stuart),
};

static struct resource pxa_resource_hwuart[] = {
      {
            .start      = __PREG(HWUART),
            .end  = __PREG(HWUART) + 47,
            .flags      = IORESOURCE_MEM,
      }, {
            .start      = IRQ_HWUART,
            .end  = IRQ_HWUART,
            .flags      = IORESOURCE_IRQ,
      }
};

struct platform_device pxa_device_hwuart = {
      .name       = "pxa2xx-uart",
      .id         = 3,
      .resource   = pxa_resource_hwuart,
      .num_resources    = ARRAY_SIZE(pxa_resource_hwuart),
};

static struct resource pxai2c_resources[] = {
      {
            .start      = 0x40301680,
            .end  = 0x403016a3,
            .flags      = IORESOURCE_MEM,
      }, {
            .start      = IRQ_I2C,
            .end  = IRQ_I2C,
            .flags      = IORESOURCE_IRQ,
      },
};

struct platform_device pxa_device_i2c = {
      .name       = "pxa2xx-i2c",
      .id         = 0,
      .resource   = pxai2c_resources,
      .num_resources    = ARRAY_SIZE(pxai2c_resources),
};

void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info)
{
      pxa_device_i2c.dev.platform_data = info;
}

static struct resource pxai2s_resources[] = {
      {
            .start      = 0x40400000,
            .end  = 0x40400083,
            .flags      = IORESOURCE_MEM,
      }, {
            .start      = IRQ_I2S,
            .end  = IRQ_I2S,
            .flags      = IORESOURCE_IRQ,
      },
};

struct platform_device pxa_device_i2s = {
      .name       = "pxa2xx-i2s",
      .id         = -1,
      .resource   = pxai2s_resources,
      .num_resources    = ARRAY_SIZE(pxai2s_resources),
};

static u64 pxaficp_dmamask = ~(u32)0;

struct platform_device pxa_device_ficp = {
      .name       = "pxa2xx-ir",
      .id         = -1,
      .dev        = {
            .dma_mask = &pxaficp_dmamask,
            .coherent_dma_mask = 0xffffffff,
      },
};

void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
{
      pxa_device_ficp.dev.platform_data = info;
}

struct platform_device pxa_device_rtc = {
      .name       = "sa1100-rtc",
      .id         = -1,
};

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