#include <common.h>
#include <mpc8xx.h>
#include <pcmcia.h>

#undef  CONFIG_PCMCIA

#if defined(CONFIG_CMD_PCMCIA)
#define CONFIG_PCMCIA
#endif

#if (defined(CONFIG_CMD_IDE)) && defined(CONFIG_IDE_8xx_PCCARD)
#define CONFIG_PCMCIA
#endif

#ifdef  CONFIG_PCMCIA

#define PCMCIA_BOARD_MSG "UC100"

/*
 * Remark: don't turn off OE "__MY_PCMCIA_GCRX_CXOE" on UC100 board.
 *         This leads to board-hangup! (sr, 8 Dez. 2004)
 */
static void cfg_ports (void)
{
        volatile immap_t        *immap;

        immap = (immap_t *)CONFIG_SYS_IMMR;

        /*
         * Configure Port A for MAX1602 PC-Card Power-Interface Switch
         */
        immap->im_ioport.iop_padat &= ~0x8000;  /* set port x output to low */
        immap->im_ioport.iop_padir |= 0x8000;   /* enable port x as output */

        debug ("Set Port A: PAR: %08x DIR: %08x DAT: %08x\n",
               immap->im_ioport.iop_papar, immap->im_ioport.iop_padir,
               immap->im_ioport.iop_padat);
}

int pcmcia_hardware_enable(int slot)
{
        volatile immap_t        *immap;
        volatile pcmconf8xx_t   *pcmp;
        volatile sysconf8xx_t   *sysp;
        uint reg, mask;

        debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);

        udelay(10000);

        immap = (immap_t *)CONFIG_SYS_IMMR;
        sysp  = (sysconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_siu_conf));
        pcmp  = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));

        /* Configure Ports for TPS2211A PC-Card Power-Interface Switch */
        cfg_ports ();

        /*
         * Configure SIUMCR to enable PCMCIA port B
         * (VFLS[0:1] are not used for debugging, we connect FRZ# instead)
         */
        sysp->sc_siumcr &= ~SIUMCR_DBGC11;      /* set DBGC to 00 */

        /* clear interrupt state, and disable interrupts */
        pcmp->pcmc_pscr =  PCMCIA_MASK(_slot_);
        pcmp->pcmc_per &= ~PCMCIA_MASK(_slot_);

        /*
         * Disable interrupts, DMA, and PCMCIA buffers
         * (isolate the interface) and assert RESET signal
         */
        debug ("Disable PCMCIA buffers and assert RESET\n");
        reg  = 0;
        reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
        PCMCIA_PGCRX(_slot_) = reg;
        udelay(500);

        /*
         * Make sure there is a card in the slot, then configure the interface.
         */
        udelay(10000);
        debug ("[%d] %s: PIPR(%p)=0x%x\n",
               __LINE__,__FUNCTION__,
               &(pcmp->pcmc_pipr),pcmp->pcmc_pipr);
        if (pcmp->pcmc_pipr & (0x18000000 >> (slot << 4))) {
                printf ("   No Card found\n");
                return (1);
        }

        /*
         * Power On.
         */
        mask = PCMCIA_VS1(slot) | PCMCIA_VS2(slot);
        reg  = pcmp->pcmc_pipr;
        debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n",
               reg,
               (reg&PCMCIA_VS1(slot))?"n":"ff",
               (reg&PCMCIA_VS2(slot))?"n":"ff");

        if ((reg & mask) == mask)
                puts (" 5.0V card found: ");
        else
                puts (" 3.3V card found: ");

        /*  switch VCC on */
        immap->im_ioport.iop_padat |= 0x8000; /* power enable 3.3V */

        udelay(10000);

        debug ("Enable PCMCIA buffers and stop RESET\n");
        reg  =  PCMCIA_PGCRX(_slot_);
        reg &= ~__MY_PCMCIA_GCRX_CXRESET;       /* active high */
        reg &= ~__MY_PCMCIA_GCRX_CXOE;          /* active low  */
        PCMCIA_PGCRX(_slot_) = reg;

        udelay(250000); /* some cards need >150 ms to come up :-( */

        debug ("# hardware_enable done\n");

        return (0);
}


#if defined(CONFIG_CMD_PCMCIA)
int pcmcia_hardware_disable(int slot)
{
        volatile immap_t        *immap;
        volatile cpm8xx_t       *cp;
        volatile pcmconf8xx_t   *pcmp;
        u_long reg;

        debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);

        immap = (immap_t *)CONFIG_SYS_IMMR;
        pcmp  = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));

        /* switch VCC off */
        immap->im_ioport.iop_padat &= ~0x8000; /* power disable 3.3V */

        /* Configure PCMCIA General Control Register */
        debug ("Disable PCMCIA buffers and assert RESET\n");
        reg  = 0;
        reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
        PCMCIA_PGCRX(_slot_) = reg;

        udelay(10000);

        return (0);
}
#endif


int pcmcia_voltage_set(int slot, int vcc, int vpp)
{
        u_long reg;

        debug ("voltage_set: "
                        PCMCIA_BOARD_MSG
                        " Slot %c, Vcc=%d.%d, Vpp=%d.%d\n",
        'A'+slot, vcc/10, vcc%10, vpp/10, vcc%10);

        /*
         * Disable PCMCIA buffers (isolate the interface)
         * and assert RESET signal
         */
        debug ("Disable PCMCIA buffers and assert RESET\n");
        reg  = PCMCIA_PGCRX(_slot_);
        reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
        PCMCIA_PGCRX(_slot_) = reg;
        udelay(500);

        /*
         * Configure Port C pins for
         * 5 Volts Enable and 3 Volts enable,
         * Turn all power pins to Hi-Z
         */
        debug ("PCMCIA power OFF\n");
        cfg_ports ();   /* Enables switch, but all in Hi-Z */

        debug ("Enable PCMCIA buffers and stop RESET\n");
        reg  =  PCMCIA_PGCRX(_slot_);
        reg &= ~__MY_PCMCIA_GCRX_CXRESET;       /* active high */
        reg &= ~__MY_PCMCIA_GCRX_CXOE;          /* active low  */
        PCMCIA_PGCRX(_slot_) = reg;
        udelay(500);

        debug ("voltage_set: " PCMCIA_BOARD_MSG " Slot %c, DONE\n",
               slot+'A');
        return (0);
}

#endif  /* CONFIG_PCMCIA */