include/asm-arm/arch-s3c24a0/ide.h

   1 /*
   2  * include/asm-arm/arch-s3c24a0/ide.h
   3  *
   4  *
   5  * Originally based upon linux/include/asm-arm/arch-sa1100/ide.h
   6  *
   7  * Changes
   8  *
   9  * 2004/06/10 <heechul.yun@samsung.com>  SPJ CPLD IDE support
  10  * 2004/06/13 <heechul.yun@samsung.com>  CPLD IDE and USB csupport for SPJ
  11  *
  12  */
  13
  14 #include <asm/irq.h>
  15 #include <asm/hardware.h>
  16 #include <asm/mach-types.h>
  17
  18
  19 #ifndef MAX_HWIFS
  20         #define MAX_HWIFS       1
  21 #else
  22         #undef MAX_HWIFS
  23         #define MAX_HWIFS 1
  24 #endif
  25
  26 #define CPLD_IDE_DEBUG  // hcyun
  27
  28 /*
  29  * Set up a hw structure for a specified data port, control port and IRQ.
  30  * This should follow whatever the default interface uses.
  31  */
  32 static __inline__ void
  33 ide_init_hwif_ports(hw_regs_t *hw, int data_port, int ctrl_port, int *irq)
  34 {
  35         ide_ioreg_t reg;
  36
  37         memset(hw, 0, sizeof(*hw));
  38
  39         reg = (ide_ioreg_t)data_port;
  40
  41         /* increasing 8 */
  42         hw->io_ports[IDE_DATA_OFFSET] =  reg + 0;
  43         hw->io_ports[IDE_ERROR_OFFSET] = reg + (1 << 3);
  44         hw->io_ports[IDE_NSECTOR_OFFSET] = reg + (2 << 3);
  45         hw->io_ports[IDE_SECTOR_OFFSET] = reg + (3 << 3);
  46         hw->io_ports[IDE_LCYL_OFFSET] = reg + (4 << 3);
  47         hw->io_ports[IDE_HCYL_OFFSET] = reg + (5 << 3);
  48         hw->io_ports[IDE_SELECT_OFFSET] = reg + (6 << 3);
  49         hw->io_ports[IDE_STATUS_OFFSET] = reg + (7 << 3);
  50
  51         hw->io_ports[IDE_CONTROL_OFFSET] = (ide_ioreg_t) ctrl_port;
  52
  53         if (irq)
  54                 *irq = 0;
  55 }
  56
  57
  58 /*
  59  * CPLD IDE reset. to reset first assert 0 and then assert 1
  60  */
  61
  62 static __inline__ void ide_set_reset(int on)
  63 {
  64         volatile unsigned char *usb_reset = (unsigned char *)(SMDK_CPLD_USB_VIO+0x00800000);
  65         volatile unsigned char *ide_reset = (unsigned char *)(SMDK_CPLD_IDE_VIO+0x00800000);
  66
  67         if ( on ) {
  68                 /* turn CPLD to IDE mode */
  69                 *ide_reset = 0x02;
  70
  71                 /* turn on IDE */
  72                 *ide_reset = 0x03;
  73
  74         } else {
  75                 /* turn off IDE */
  76                 *ide_reset = 0x02;
  77
  78                 *ide_reset = 0x02;
  79         }
  80
  81 /*
  82         *ide_reset = 0x1;
  83         *usb_reset = 0x0;
  84         *usb_reset = 0x1;
  85 */
  86
  87 }
  88
  89
  90 /*
  91  * Register the standard ports for this architecture with the IDE driver.
  92  */
  93 static __inline__ void
  94 ide_init_default_hwifs(void)
  95 {
  96         /*
  97                 A7      A6      A5      A4      A3      <-- CPLD address line used
  98
  99                 CE2     CE1     A2      A1      A0       IORD   IOWR
 100                 ---------------------------------
 101                 1       0       0       0       0        data port
 102                 ..
 103                 ..
 104
 105                 0       1       1       1       0        control port
 106
 107                 data port = SMDK_CPLD_IDE_VIO + 0x80
 108                 control port = SMDK_CPLD_IDE_VIO + 0x70
 109
 110          */
 111
 112         /* Nothing to declare... */
 113
 114         int ret;
 115
 116         hw_regs_t hw;
 117
 118         ide_init_hwif_ports(&hw, SMDK_CPLD_IDE_VIO + 0x80, SMDK_CPLD_IDE_VIO + 0x70, NULL);
 119
 120         hw.irq = SMDK_CPLD_IDE_IRQ;
 121
 122         ide_register_hw(&hw, NULL);
 123
 124
 125 #ifdef CPLD_IDE_DEBUG
 126         printk("SMDK24A0 : IDE initialize - hcyun \n");
 127         printk("!!FIXME!! IDE and cs8900 are controlled by SROM bank1 and need different timing and bus width\n");
 128 #endif
 129
 130         bank1_set_state(B1_IDE_PIO4);
 131
 132         // ide reset
 133         ide_set_reset(0);
 134
 135         mdelay(250);
 136
 137         ide_set_reset(1);
 138
 139         mdelay(500); // wait 250ms see ATA spec
 140
 141         printk("riging edge interrupt\n");
 142         ret = set_external_irq(SMDK_CPLD_IDE_IRQ, EINT_RISING_EDGE, EINT_PULLUP_EN);
 143
 144         if (ret)
 145                 printk("ERROR: irq set failed\n");
 146
 147 }