Logo Search packages:      
Sourcecode: linux version File versions  Download package

q40ide.c

/*
 *  linux/drivers/ide/legacy/q40ide.c -- Q40 I/O port IDE Driver
 *
 *     (c) Richard Zidlicky
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of this archive for
 *  more details.
 *
 *
 */

#include <linux/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>

#include <linux/ide.h>

    /*
     *  Bases of the IDE interfaces
     */

#define Q40IDE_NUM_HWIFS      2

#define PCIDE_BASE1     0x1f0
#define PCIDE_BASE2     0x170
#define PCIDE_BASE3     0x1e8
#define PCIDE_BASE4     0x168
#define PCIDE_BASE5     0x1e0
#define PCIDE_BASE6     0x160

static const unsigned long pcide_bases[Q40IDE_NUM_HWIFS] = {
    PCIDE_BASE1, PCIDE_BASE2, /* PCIDE_BASE3, PCIDE_BASE4  , PCIDE_BASE5,
    PCIDE_BASE6 */
};


    /*
     *  Offsets from one of the above bases
     */

/* used to do addr translation here but it is easier to do in setup ports */
/*#define IDE_OFF_B(x)  ((unsigned long)Q40_ISA_IO_B((IDE_##x##_OFFSET)))*/

#define IDE_OFF_B(x)    ((unsigned long)((IDE_##x##_OFFSET)))
#define IDE_OFF_W(x)    ((unsigned long)((IDE_##x##_OFFSET)))

static const int pcide_offsets[IDE_NR_PORTS] = {
    IDE_OFF_W(DATA), IDE_OFF_B(ERROR), IDE_OFF_B(NSECTOR), IDE_OFF_B(SECTOR),
    IDE_OFF_B(LCYL), IDE_OFF_B(HCYL), 6 /*IDE_OFF_B(CURRENT)*/, IDE_OFF_B(STATUS),
    518/*IDE_OFF(CMD)*/
};

static int q40ide_default_irq(unsigned long base)
{
           switch (base) {
                  case 0x1f0: return 14;
                case 0x170: return 15;
                case 0x1e8: return 11;
                default:
                  return 0;
         }
}


/*
 * This is very similar to ide_setup_ports except that addresses
 * are pretranslated for q40 ISA access
 */
void q40_ide_setup_ports ( hw_regs_t *hw,
                  unsigned long base, int *offsets,
                  unsigned long ctrl, unsigned long intr,
                  ide_ack_intr_t *ack_intr,
/*
 *                ide_io_ops_t *iops,
 */
                  int irq)
{
      int i;

      memset(hw, 0, sizeof(hw_regs_t));
      for (i = 0; i < IDE_NR_PORTS; i++) {
            /* BIG FAT WARNING: 
               assumption: only DATA port is ever used in 16 bit mode */
            if ( i==0 )
                  hw->io_ports[i] = Q40_ISA_IO_W(base + offsets[i]);
            else
                  hw->io_ports[i] = Q40_ISA_IO_B(base + offsets[i]);
      }

      hw->irq = irq;
      hw->ack_intr = ack_intr;
/*
 *    hw->iops = iops;
 */
}



/* 
 * the static array is needed to have the name reported in /proc/ioports,
 * hwif->name unfortunately isn't available yet
 */
static const char *q40_ide_names[Q40IDE_NUM_HWIFS]={
      "ide0", "ide1"
};

/*
 *  Probe for Q40 IDE interfaces
 */

void __init q40ide_init(void)
{
    int i;
    ide_hwif_t *hwif;
    int index;
    const char *name;

    if (!MACH_IS_Q40)
      return ;

    for (i = 0; i < Q40IDE_NUM_HWIFS; i++) {
      hw_regs_t hw;

      name = q40_ide_names[i];
      if (!request_region(pcide_bases[i], 8, name)) {
            printk("could not reserve ports %lx-%lx for %s\n",
                   pcide_bases[i],pcide_bases[i]+8,name);
            continue;
      }
      if (!request_region(pcide_bases[i]+0x206, 1, name)) {
            printk("could not reserve port %lx for %s\n",
                   pcide_bases[i]+0x206,name);
            release_region(pcide_bases[i], 8);
            continue;
      }
      q40_ide_setup_ports(&hw,(unsigned long) pcide_bases[i], (int *)pcide_offsets, 
                  pcide_bases[i]+0x206, 
                  0, NULL,
//                m68kide_iops,
                  q40ide_default_irq(pcide_bases[i]));
      index = ide_register_hw(&hw, NULL, 1, &hwif);
      // **FIXME**
      if (index != -1)
            hwif->mmio = 1;
    }
}


Generated by  Doxygen 1.6.0   Back to index