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arch-lpd7a40x.c

/* arch/arm/mach-lh7a40x/arch-lpd7a40x.c
 *
 *  Copyright (C) 2004 Logic Product Development
 *
 *  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.
 *
 */

#include <linux/tty.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/irq.h>

#include <asm/hardware.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>

#include "common.h"

#define CPLD_INT_NETHERNET    (1<<0)
#define CPLD_INTMASK_ETHERNET (1<<2)
#if defined (CONFIG_MACH_LPD7A400)
# define CPLD_INT_NTOUCH            (1<<1)
# define CPLD_INTMASK_TOUCH   (1<<3)
# define CPLD_INT_PEN         (1<<4)
# define CPLD_INTMASK_PEN     (1<<4)
# define CPLD_INT_PIRQ        (1<<4)
#endif
#define CPLD_INTMASK_CPLD     (1<<7)
#define CPLD_INT_CPLD         (1<<6)

#define CPLD_CONTROL_SWINT          (1<<7) /* Disable all CPLD IRQs */
#define CPLD_CONTROL_OCMSK          (1<<6) /* Mask USB1 connect IRQ */
#define CPLD_CONTROL_PDRV           (1<<5) /* PCC_nDRV high */
#define CPLD_CONTROL_USB1C          (1<<4) /* USB1 connect IRQ active */
#define CPLD_CONTROL_USB1P          (1<<3) /* USB1 power disable */
#define CPLD_CONTROL_AWKP           (1<<2) /* Auto-wakeup disabled  */
#define CPLD_CONTROL_LCD_ENABLE           (1<<1) /* LCD Vee enable */
#define CPLD_CONTROL_WRLAN_NENABLE  (1<<0) /* SMC91x power disable */


static struct resource smc91x_resources[] = {
      [0] = {
            .start      = CPLD00_PHYS,
            .end  = CPLD00_PHYS + CPLD00_SIZE - 1, /* Only needs 16B */
            .flags      = IORESOURCE_MEM,
      },

      [1] = {
            .start      = IRQ_LPD7A40X_ETH_INT,
            .end  = IRQ_LPD7A40X_ETH_INT,
            .flags      = IORESOURCE_IRQ,
      },

};

static struct platform_device smc91x_device = {
      .name       = "smc91x",
      .id         = 0,
      .num_resources    = ARRAY_SIZE(smc91x_resources),
      .resource   = smc91x_resources,
};

static struct resource lh7a40x_usbclient_resources[] = {
      [0] = {
            .start      = USB_PHYS,
            .end  = (USB_PHYS + PAGE_SIZE),
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = IRQ_USB,
            .end  = IRQ_USB,
            .flags      = IORESOURCE_IRQ,
      },
};

static u64 lh7a40x_usbclient_dma_mask = 0xffffffffUL;

static struct platform_device lh7a40x_usbclient_device = {
//    .name       = "lh7a40x_udc",
      .name       = "lh7-udc",
      .id         = 0,
      .dev        = {
            .dma_mask = &lh7a40x_usbclient_dma_mask,
            .coherent_dma_mask = 0xffffffffUL,
      },
      .num_resources    = ARRAY_SIZE (lh7a40x_usbclient_resources),
      .resource   = lh7a40x_usbclient_resources,
};

#if defined (CONFIG_ARCH_LH7A404)

static struct resource lh7a404_usbhost_resources [] = {
      [0] = {
            .start      = USBH_PHYS,
            .end  = (USBH_PHYS + 0xFF),
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = IRQ_USHINTR,
            .end  = IRQ_USHINTR,
            .flags      = IORESOURCE_IRQ,
      },
};

static u64 lh7a404_usbhost_dma_mask = 0xffffffffUL;

static struct platform_device lh7a404_usbhost_device = {
      .name       = "lh7a404-ohci",
      .id         = 0,
      .dev        = {
            .dma_mask = &lh7a404_usbhost_dma_mask,
            .coherent_dma_mask = 0xffffffffUL,
      },
      .num_resources    = ARRAY_SIZE (lh7a404_usbhost_resources),
      .resource   = lh7a404_usbhost_resources,
};

#endif

static struct platform_device* lpd7a40x_devs[] __initdata = {
      &smc91x_device,
      &lh7a40x_usbclient_device,
#if defined (CONFIG_ARCH_LH7A404)
      &lh7a404_usbhost_device,
#endif
};

extern void lpd7a400_map_io (void);

static void __init lpd7a40x_init (void)
{
#if defined (CONFIG_MACH_LPD7A400)
      CPLD_CONTROL |= 0
            | CPLD_CONTROL_SWINT /* Disable software interrupt */
            | CPLD_CONTROL_OCMSK; /* Mask USB1 connection IRQ */
      CPLD_CONTROL &= ~(0
                    | CPLD_CONTROL_LCD_ENABLE   /* Disable LCD */
                    | CPLD_CONTROL_WRLAN_NENABLE      /* Enable SMC91x */
            );
#endif

#if defined (CONFIG_MACH_LPD7A404)
      CPLD_CONTROL &= ~(0
                    | CPLD_CONTROL_WRLAN_NENABLE      /* Enable SMC91x */
            );
#endif

      platform_add_devices (lpd7a40x_devs, ARRAY_SIZE (lpd7a40x_devs));
#if defined (CONFIG_FB_ARMCLCD)
        lh7a40x_clcd_init ();
#endif
}

static void lh7a40x_ack_cpld_irq (u32 irq)
{
      /* CPLD doesn't have ack capability, but some devices may */

#if defined (CPLD_INTMASK_TOUCH)
      /* The touch control *must* mask the interrupt because the
       * interrupt bit is read by the driver to determine if the pen
       * is still down. */
      if (irq == IRQ_TOUCH)
            CPLD_INTERRUPTS |= CPLD_INTMASK_TOUCH;
#endif
}

static void lh7a40x_mask_cpld_irq (u32 irq)
{
      switch (irq) {
      case IRQ_LPD7A40X_ETH_INT:
            CPLD_INTERRUPTS |= CPLD_INTMASK_ETHERNET;
            break;
#if defined (IRQ_TOUCH)
      case IRQ_TOUCH:
            CPLD_INTERRUPTS |= CPLD_INTMASK_TOUCH;
            break;
#endif
      }
}

static void lh7a40x_unmask_cpld_irq (u32 irq)
{
      switch (irq) {
      case IRQ_LPD7A40X_ETH_INT:
            CPLD_INTERRUPTS &= ~CPLD_INTMASK_ETHERNET;
            break;
#if defined (IRQ_TOUCH)
      case IRQ_TOUCH:
            CPLD_INTERRUPTS &= ~CPLD_INTMASK_TOUCH;
            break;
#endif
      }
}

static struct irq_chip lpd7a40x_cpld_chip = {
      .name = "CPLD",
      .ack  = lh7a40x_ack_cpld_irq,
      .mask = lh7a40x_mask_cpld_irq,
      .unmask     = lh7a40x_unmask_cpld_irq,
};

static void lpd7a40x_cpld_handler (unsigned int irq, struct irq_desc *desc)
{
      unsigned int mask = CPLD_INTERRUPTS;

      desc->chip->ack (irq);

      if ((mask & (1<<0)) == 0)     /* WLAN */
            IRQ_DISPATCH (IRQ_LPD7A40X_ETH_INT);

#if defined (IRQ_TOUCH)
      if ((mask & (1<<1)) == 0)     /* Touch */
            IRQ_DISPATCH (IRQ_TOUCH);
#endif

      desc->chip->unmask (irq); /* Level-triggered need this */
}


void __init lh7a40x_init_board_irq (void)
{
      int irq;

            /* Rev A (v2.8): PF0, PF1, PF2, and PF3 are available IRQs.
                             PF7 supports the CPLD.
               Rev B (v3.4): PF0, PF1, and PF2 are available IRQs.
                             PF3 supports the CPLD.
               (Some) LPD7A404 prerelease boards report a version
               number of 0x16, but we force an override since the
               hardware is of the newer variety.
            */

      unsigned char cpld_version = CPLD_REVISION;
      int pinCPLD = (cpld_version == 0x28) ? 7 : 3;

#if defined CONFIG_MACH_LPD7A404
      cpld_version = 0x34;    /* Coerce LPD7A404 to RevB */
#endif

            /* First, configure user controlled GPIOF interrupts  */

      GPIO_PFDD   &= ~0x0f; /* PF0-3 are inputs */
      GPIO_INTTYPE1     &= ~0x0f; /* PF0-3 are level triggered */
      GPIO_INTTYPE2     &= ~0x0f; /* PF0-3 are active low */
      barrier ();
      GPIO_GPIOFINTEN |=  0x0f; /* Enable PF0, PF1, PF2, and PF3 IRQs */

            /* Then, configure CPLD interrupt */

                  /* Disable all CPLD interrupts */
#if defined (CONFIG_MACH_LPD7A400)
      CPLD_INTERRUPTS   = CPLD_INTMASK_TOUCH | CPLD_INTMASK_PEN
            | CPLD_INTMASK_ETHERNET;
      /* *** FIXME: don't know why we need 7 and 4. 7 is way wrong
               and 4 is uncefined. */
      // (1<<7)|(1<<4)|(1<<3)|(1<<2);
#endif
#if defined (CONFIG_MACH_LPD7A404)
      CPLD_INTERRUPTS   = CPLD_INTMASK_ETHERNET;
      /* *** FIXME: don't know why we need 6 and 5, neither is defined. */
      // (1<<6)|(1<<5)|(1<<3);
#endif
      GPIO_PFDD   &= ~(1 << pinCPLD); /* Make input */
      GPIO_INTTYPE1     &= ~(1 << pinCPLD); /* Level triggered */
      GPIO_INTTYPE2     &= ~(1 << pinCPLD); /* Active low */
      barrier ();
      GPIO_GPIOFINTEN |=  (1 << pinCPLD); /* Enable */

            /* Cascade CPLD interrupts */

      for (irq = IRQ_BOARD_START;
           irq < IRQ_BOARD_START + NR_IRQ_BOARD; ++irq) {
            set_irq_chip (irq, &lpd7a40x_cpld_chip);
            set_irq_handler (irq, handle_level_irq);
            set_irq_flags (irq, IRQF_VALID);
      }

      set_irq_chained_handler ((cpld_version == 0x28)
                         ? IRQ_CPLD_V28
                         : IRQ_CPLD_V34,
                         lpd7a40x_cpld_handler);
}

static struct map_desc lpd7a40x_io_desc[] __initdata = {
      {
            .virtual    = IO_VIRT,
            .pfn        = __phys_to_pfn(IO_PHYS),
            .length           = IO_SIZE,
            .type       = MT_DEVICE
      },
      {     /* Mapping added to work around chip select problems */
            .virtual    = IOBARRIER_VIRT,
            .pfn        = __phys_to_pfn(IOBARRIER_PHYS),
            .length           = IOBARRIER_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CF_VIRT,
            .pfn        = __phys_to_pfn(CF_PHYS),
            .length           = CF_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD02_VIRT,
            .pfn        = __phys_to_pfn(CPLD02_PHYS),
            .length           = CPLD02_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD06_VIRT,
            .pfn        = __phys_to_pfn(CPLD06_PHYS),
            .length           = CPLD06_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD08_VIRT,
            .pfn        = __phys_to_pfn(CPLD08_PHYS),
            .length           = CPLD08_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD08_VIRT,
            .pfn        = __phys_to_pfn(CPLD08_PHYS),
            .length           = CPLD08_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD0A_VIRT,
            .pfn        = __phys_to_pfn(CPLD0A_PHYS),
            .length           = CPLD0A_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD0C_VIRT,
            .pfn        = __phys_to_pfn(CPLD0C_PHYS),
            .length           = CPLD0C_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD0E_VIRT,
            .pfn        = __phys_to_pfn(CPLD0E_PHYS),
            .length           = CPLD0E_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD10_VIRT,
            .pfn        = __phys_to_pfn(CPLD10_PHYS),
            .length           = CPLD10_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD12_VIRT,
            .pfn        = __phys_to_pfn(CPLD12_PHYS),
            .length           = CPLD12_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD14_VIRT,
            .pfn        = __phys_to_pfn(CPLD14_PHYS),
            .length           = CPLD14_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD16_VIRT,
            .pfn        = __phys_to_pfn(CPLD16_PHYS),
            .length           = CPLD16_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD18_VIRT,
            .pfn        = __phys_to_pfn(CPLD18_PHYS),
            .length           = CPLD18_SIZE,
            .type       = MT_DEVICE
      },
      {
            .virtual    = CPLD1A_VIRT,
            .pfn        = __phys_to_pfn(CPLD1A_PHYS),
            .length           = CPLD1A_SIZE,
            .type       = MT_DEVICE
      },
};

void __init
lpd7a40x_map_io(void)
{
      iotable_init (lpd7a40x_io_desc, ARRAY_SIZE (lpd7a40x_io_desc));
}

#ifdef CONFIG_MACH_LPD7A400

MACHINE_START (LPD7A400, "Logic Product Development LPD7A400-10")
      /* Maintainer: Marc Singer */
      .phys_io    = 0x80000000,
      .io_pg_offst      = ((io_p2v (0x80000000))>>18) & 0xfffc,
      .boot_params      = 0xc0000100,
      .map_io           = lpd7a40x_map_io,
      .init_irq   = lh7a400_init_irq,
      .timer            = &lh7a40x_timer,
      .init_machine     = lpd7a40x_init,
MACHINE_END

#endif

#ifdef CONFIG_MACH_LPD7A404

MACHINE_START (LPD7A404, "Logic Product Development LPD7A404-10")
      /* Maintainer: Marc Singer */
      .phys_io    = 0x80000000,
      .io_pg_offst      = ((io_p2v (0x80000000))>>18) & 0xfffc,
      .boot_params      = 0xc0000100,
      .map_io           = lpd7a40x_map_io,
      .init_irq   = lh7a404_init_irq,
      .timer            = &lh7a40x_timer,
      .init_machine     = lpd7a40x_init,
MACHINE_END

#endif

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