/*======================================================================

    Device driver for Databook TCIC-2 PCMCIA controller

    tcic.c 1.102 1999/07/20 16:01:33

    The contents of this file are subject to the Mozilla Public
    License Version 1.1 (the "License"); you may not use this file
    except in compliance with the License. You may obtain a copy of
    the License at http://www.mozilla.org/MPL/

    Software distributed under the License is distributed on an "AS
    IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
    implied. See the License for the specific language governing
    rights and limitations under the License.

    The initial developer of the original code is David A. Hinds
    <dhinds@hyper.stanford.edu>.  Portions created by David A. Hinds
    are Copyright (C) 1998 David A. Hinds.  All Rights Reserved.
    
======================================================================*/

#include <pcmcia/config.h>
#include <pcmcia/k_compat.h>

#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/string.h>

#include <asm/io.h>
#include <asm/bitops.h>
#include <asm/segment.h>
#include <asm/system.h>

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/malloc.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/delay.h>

#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/ss.h>
#include "tcic.h"

#ifdef PCMCIA_DEBUG
static int pc_debug = PCMCIA_DEBUG;
MODULE_PARM(pc_debug, "i");
static const char *version =
"tcic.c 1.102 1999/07/20 16:01:33 (David Hinds)";
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
#else
#define DEBUG(n, args...)
#endif

/*====================================================================*/

/* Parameters that can be set with 'insmod' */

/* The base port address of the TCIC-2 chip */
static int tcic_base = TCIC_BASE;

/* Specify a socket number to ignore */
static int ignore = -1;

/* Probe for safe interrupts? */
static int do_scan = 1;

/* Bit map of interrupts to choose from */
static u_int irq_mask = 0xffff;
static int irq_list[16] = { -1 };

/* The card status change interrupt -- 0 means autoselect */
static int cs_irq = 0;

/* Poll status interval -- 0 means default to interrupt */
static int poll_interval = 0;

/* Delay for card status double-checking */
static int poll_quick = HZ/20;

/* CCLK external clock time, in nanoseconds.  70 ns = 14.31818 MHz */
static int cycle_time = 70;

MODULE_PARM(tcic_base, "i");
MODULE_PARM(ignore, "i");
MODULE_PARM(do_scan, "i");
MODULE_PARM(irq_mask, "i");
MODULE_PARM(irq_list, "1-16i");
MODULE_PARM(cs_irq, "i");
MODULE_PARM(poll_interval, "i");
MODULE_PARM(poll_quick, "i");
MODULE_PARM(cycle_time, "i");

/*====================================================================*/

static void tcic_interrupt IRQ(int irq, void *dev, struct pt_regs *regs);
static void tcic_timer(u_long data);
static int tcic_service(u_int sock, u_int cmd, void *arg);

typedef struct socket_info_t {
    u_short	psock;
    void	(*handler)(void *info, u_int events);
    void	*info;
    u_char	last_sstat;
    u_char	id;
} socket_info_t;

static struct timer_list poll_timer;
static int tcic_timer_pending = 0;

static int sockets;
static socket_info_t socket_table[2];

static socket_cap_t tcic_cap = {
    /* only 16-bit cards, memory windows must be size-aligned */
    SS_CAP_PCCARD | SS_CAP_MEM_ALIGN,
    0x4cf8,		/* irq 14, 11, 10, 7, 6, 5, 4, 3 */
    0x1000,		/* 4K minimum window size */
    0, 0		/* No PCI or CardBus support */
};

/*====================================================================*/

#ifdef PCMCIA_DEBUG_X
static u_char tcic_getb(u_char reg)
{
    u_char val = inb(tcic_base+reg);
    printk(KERN_DEBUG "tcic_getb(%#x) = %#x\n", tcic_base+reg, val);
    return val;
}

static u_short tcic_getw(u_char reg)
{
    u_short val = inw(tcic_base+reg);
    printk(KERN_DEBUG "tcic_getw(%#x) = %#x\n", tcic_base+reg, val);
    return val;
}

static void tcic_setb(u_char reg, u_char data)
{
    printk(KERN_DEBUG "tcic_setb(%#x, %#x)\n", tcic_base+reg, data);
    outb(data, tcic_base+reg);
}

static void tcic_setw(u_char reg, u_short data)
{
    printk(KERN_DEBUG "tcic_setw(%#x, %#x)\n", tcic_base+reg, data);
    outw(data, tcic_base+reg);
}
#else
#define tcic_getb(reg) inb(tcic_base+reg)
#define tcic_getw(reg) inw(tcic_base+reg)
#define tcic_setb(reg, data) outb(data, tcic_base+reg)
#define tcic_setw(reg, data) outw(data, tcic_base+reg)
#endif

static void tcic_setl(u_char reg, u_int data)
{
#ifdef PCMCIA_DEBUG_X
    printk(KERN_DEBUG "tcic_setl(%#x, %#lx)\n", tcic_base+reg, data);
#endif
    outw(data & 0xffff, tcic_base+reg);
    outw(data >> 16, tcic_base+reg+2);
}

static u_char tcic_aux_getb(u_short reg)
{
    u_char mode = (tcic_getb(TCIC_MODE) & TCIC_MODE_PGMMASK) | reg;
    tcic_setb(TCIC_MODE, mode);
    return tcic_getb(TCIC_AUX);
}

static void tcic_aux_setb(u_short reg, u_char data)
{
    u_char mode = (tcic_getb(TCIC_MODE) & TCIC_MODE_PGMMASK) | reg;
    tcic_setb(TCIC_MODE, mode);
    tcic_setb(TCIC_AUX, data);
}

static u_short tcic_aux_getw(u_short reg)
{
    u_char mode = (tcic_getb(TCIC_MODE) & TCIC_MODE_PGMMASK) | reg;
    tcic_setb(TCIC_MODE, mode);
    return tcic_getw(TCIC_AUX);
}

static void tcic_aux_setw(u_short reg, u_short data)
{
    u_char mode = (tcic_getb(TCIC_MODE) & TCIC_MODE_PGMMASK) | reg;
    tcic_setb(TCIC_MODE, mode);
    tcic_setw(TCIC_AUX, data);
}

/*====================================================================*/

/* Time conversion functions */

static int to_cycles(int ns)
{
    if (ns < 14)
	return 0;
    else
	return 2*(ns-14)/cycle_time;
} /* speed_convert */

static int to_ns(int cycles)
{
    return (cycles*cycle_time)/2 + 14;
}

/*====================================================================*/

static volatile u_int irq_hits;

static void irq_count IRQ(int irq, void *dev, struct pt_regs *regs)
{
    irq_hits++;
}

static u_int try_irq(int irq)
{
    u_short cfg;

    irq_hits = 0;
    if (REQUEST_IRQ(irq, irq_count, 0, "irq scan", NULL) != 0)
	return -1;
    mdelay(10);
    if (irq_hits) {
	FREE_IRQ(irq, NULL);
	return -1;
    }

    /* Generate one interrupt */
    cfg = TCIC_SYSCFG_AUTOBUSY | 0x0a00;
    tcic_aux_setw(TCIC_AUX_SYSCFG, cfg | (irq == 11 ? 1 : irq));
    tcic_setb(TCIC_IENA, TCIC_IENA_ERR | TCIC_IENA_CFG_HIGH);
    tcic_setb(TCIC_ICSR, TCIC_ICSR_ERR | TCIC_ICSR_JAM);

    udelay(1000);
    FREE_IRQ(irq, NULL);

    /* Turn off interrupts */
    tcic_setb(TCIC_IENA, TCIC_IENA_CFG_OFF);
    while (tcic_getb(TCIC_ICSR))
	tcic_setb(TCIC_ICSR, TCIC_ICSR_JAM);
    tcic_aux_setw(TCIC_AUX_SYSCFG, cfg);
    
    return (irq_hits != 1);
}

static u_int irq_scan(u_int mask0)
{
    u_int mask1;
    int i;

#ifdef __alpha__
#define PIC 0x4d0
    /* Don't probe level-triggered interrupts -- reserved for PCI */
    int level_mask = inb_p(PIC) | (inb_p(PIC+1) << 8);
    if (level_mask)
	mask0 &= ~level_mask;
#endif

    mask1 = 0;
    if (do_scan) {
	for (i = 0; i < 16; i++)
	    if ((mask0 & (1 << i)) && (try_irq(i) == 0))
		mask1 |= (1 << i);
	for (i = 0; i < 16; i++)
	    if ((mask1 & (1 << i)) && (try_irq(i) != 0)) {
		mask1 ^= (1 << i);
	    }
    }
    
    if (mask1) {
	printk("scanned");
    } else {
	/* Fallback: just find interrupts that aren't in use */
	for (i = 0; i < 16; i++)
	    if ((mask0 & (1 << i)) &&
		(REQUEST_IRQ(i, irq_count, 0, "x", NULL) == 0)) {
		mask1 |= (1 << i);
		FREE_IRQ(i, NULL);
	    }
	printk("default");
    }
    
    printk(") = ");
    for (i = 0; i < 16; i++)
	if (mask1 & (1<<i))
	    printk("%s%d", ((mask1 & ((1<<i)-1)) ? "," : ""), i);
    printk(" ");
    
    return mask1;
}

/*======================================================================

    See if a card is present, powered up, in IO mode, and already
    bound to a (non-PCMCIA) Linux driver.

    We make an exception for cards that look like serial devices.
    
======================================================================*/

static int is_active(int s)
{
    u_short scf1, ioctl, base, num;
    u_char pwr, sstat;
    u_int addr;
    
    tcic_setl(TCIC_ADDR, (s << TCIC_ADDR_SS_SHFT)
	      | TCIC_ADDR_INDREG | TCIC_SCF1(s));
    scf1 = tcic_getw(TCIC_DATA);
    pwr = tcic_getb(TCIC_PWR);
    sstat = tcic_getb(TCIC_SSTAT);
    addr = TCIC_IWIN(s, 0);
    tcic_setw(TCIC_ADDR, addr + TCIC_IBASE_X);
    base = tcic_getw(TCIC_DATA);
    tcic_setw(TCIC_ADDR, addr + TCIC_ICTL_X);
    ioctl = tcic_getw(TCIC_DATA);

    if (ioctl & TCIC_ICTL_TINY)
	num = 1;
    else {
	num = (base ^ (base-1));
	base = base & (base-1);
    }

    if ((sstat & TCIC_SSTAT_CD) && (pwr & TCIC_PWR_VCC(s)) &&
	(scf1 & TCIC_SCF1_IOSTS) && (ioctl & TCIC_ICTL_ENA) &&
	(check_region(base, num) != 0) && ((base & 0xfeef) != 0x02e8))
	return 1;
    else
	return 0;
}

/*======================================================================

    This returns the revision code for the specified socket.
    
======================================================================*/

static int get_tcic_id(void)
{
    u_short id;
    
    tcic_aux_setw(TCIC_AUX_TEST, TCIC_TEST_DIAG);
    id = tcic_aux_getw(TCIC_AUX_ILOCK);
    id = (id & TCIC_ILOCKTEST_ID_MASK) >> TCIC_ILOCKTEST_ID_SH;
    tcic_aux_setw(TCIC_AUX_TEST, 0);
    return id;
}

/*====================================================================*/

int tcic_init(void)
{
    int i, sock;
    u_int mask, scan;

    DEBUG(0, "%s\n", version);
    
    printk(KERN_INFO "Databook TCIC-2 PCMCIA probe: ");
    sock = 0;

    if (check_region(tcic_base, 16) == 0) {
	tcic_setw(TCIC_ADDR, 0);
	if (tcic_getw(TCIC_ADDR) == 0) {
	    tcic_setw(TCIC_ADDR, 0xc3a5);
	    if (tcic_getw(TCIC_ADDR) == 0xc3a5) sock = 2;
	}
	if (sock == 0) {
	    /* See if resetting the controller does any good */
	    tcic_setb(TCIC_SCTRL, TCIC_SCTRL_RESET);
	    tcic_setb(TCIC_SCTRL, 0);
	    tcic_setw(TCIC_ADDR, 0);
	    if (tcic_getw(TCIC_ADDR) == 0) {
		tcic_setw(TCIC_ADDR, 0xc3a5);
		if (tcic_getw(TCIC_ADDR) == 0xc3a5) sock = 2;
	    }
	}
    } else
	printk("could not allocate ports, ");

    if (sock == 0) {
	printk("not found.\n");
	return -ENODEV;
    }

    request_region(tcic_base, 16, "tcic-2");

    sockets = 0;
    for (i = 0; i < sock; i++) {
	if ((i == ignore) || is_active(i)) continue;
	socket_table[sockets].psock = i;
	socket_table[sockets].handler = NULL;
	socket_table[sockets].info = NULL;
	socket_table[sockets].id = get_tcic_id();
	sockets++;
    }

    switch (socket_table[0].id) {
    case TCIC_ID_DB86082:
	printk("DB86082"); break;
    case TCIC_ID_DB86082A:
	printk("DB86082A"); break;
    case TCIC_ID_DB86084:
	printk("DB86084"); break;
    case TCIC_ID_DB86084A:
	printk("DB86084A"); break;
    case TCIC_ID_DB86072:
	printk("DB86072"); break;
    case TCIC_ID_DB86184:
	printk("DB86184"); break;
    case TCIC_ID_DB86082B:
	printk("DB86082B"); break;
    default:
	printk("Unknown ID 0x%02x", socket_table[0].id);
    }
    
    /* Set up polling */
    poll_timer.function = &tcic_timer;
    poll_timer.data = 0;
    poll_timer.prev = poll_timer.next = NULL;

    /* Build interrupt mask */
    printk(", %d sockets\n" KERN_INFO "  irq list (", sockets);
    if (irq_list[0] == -1)
	mask = irq_mask;
    else
	for (i = mask = 0; i < 16; i++)
	    mask |= (1<<irq_list[i]);
    mask &= tcic_cap.irq_mask;

    /* Scan interrupts */
    mask = irq_scan(mask);
    tcic_cap.irq_mask = mask;
    
    /* Check for only two interrupts available */
    scan = (mask & (mask-1));
    if (((scan & (scan-1)) == 0) && (poll_interval == 0))
	poll_interval = HZ;
    
    if (poll_interval == 0) {
	/* Avoid irq 12 unless it is explicitly requested */
	u_int cs_mask = mask & ((cs_irq) ? (1<<cs_irq) : ~(1<<12));
	for (i = 15; i > 0; i--)
	    if ((cs_mask & (1 << i)) &&
		(REQUEST_IRQ(i, tcic_interrupt, 0, "tcic", NULL) == 0))
		break;
	cs_irq = i;
	if (cs_irq == 0) poll_interval = HZ;
    }
    
    if (tcic_cap.irq_mask & (1 << 11))
	printk("sktirq is irq 11, ");
    if (cs_irq != 0)
	printk("status change on irq %d\n", cs_irq);
    else
	printk("polled status, interval = %d ms\n",
	       poll_interval * 1000 / HZ);
    
    for (i = 0; i < sockets; i++) {
	tcic_setw(TCIC_ADDR+2, socket_table[i].psock << TCIC_SS_SHFT);
	socket_table[i].last_sstat = tcic_getb(TCIC_SSTAT);
    }
    
    /* jump start interrupt handler, if needed */
    tcic_interrupt IRQ(0, NULL, NULL);

    if (register_ss_entry(sockets, &tcic_service) != 0) {
	printk(KERN_NOTICE "tcic: register_ss_entry() failed\n");
	release_region(tcic_base, 16);
	if (cs_irq != 0)
	    FREE_IRQ(cs_irq, NULL);
	return -ENODEV;
    }

    return 0;
    
} /* tcic_init */

/*====================================================================*/

static void tcic_finish(void)
{
    u_long flags;
    unregister_ss_entry(&tcic_service);
    save_flags(flags);
    cli();
    if (cs_irq != 0) {
	tcic_aux_setw(TCIC_AUX_SYSCFG, TCIC_SYSCFG_AUTOBUSY|0x0a00);
	FREE_IRQ(cs_irq, NULL);
    }
    if (tcic_timer_pending)
	del_timer(&poll_timer);
    restore_flags(flags);
    release_region(tcic_base, 16);
} /* tcic_finish */

/*====================================================================*/

static void tcic_interrupt IRQ(int irq, void *dev, struct pt_regs *regs)
{
    int i, quick = 0;
    u_char latch, sstat;
    u_short psock;
    u_int events;
    static volatile int active = 0;

    if (active) {
	printk(KERN_NOTICE "tcic: reentered interrupt handler!\n");
	return;
    } else
	active = 1;

    DEBUG(2, "tcic: tcic_interrupt()\n");
    
    for (i = 0; i < sockets; i++) {
	psock = socket_table[i].psock;
	tcic_setl(TCIC_ADDR, (psock << TCIC_ADDR_SS_SHFT)
		  | TCIC_ADDR_INDREG | TCIC_SCF1(psock));
	sstat = tcic_getb(TCIC_SSTAT);
	latch = sstat ^ socket_table[psock].last_sstat;
	socket_table[i].last_sstat = sstat;
	if (tcic_getb(TCIC_ICSR) & TCIC_ICSR_CDCHG) {
	    tcic_setb(TCIC_ICSR, TCIC_ICSR_CLEAR);
	    quick = 1;
	}
	if ((latch == 0) || (socket_table[psock].handler == NULL))
	    continue;
	events = (latch & TCIC_SSTAT_CD) ? SS_DETECT : 0;
	events |= (latch & TCIC_SSTAT_WP) ? SS_WRPROT : 0;
	if (tcic_getw(TCIC_DATA) & TCIC_SCF1_IOSTS) {
	    events |= (latch & TCIC_SSTAT_LBAT1) ? SS_STSCHG : 0;
	} else {
	    events |= (latch & TCIC_SSTAT_RDY) ? SS_READY : 0;
	    events |= (latch & TCIC_SSTAT_LBAT1) ? SS_BATDEAD : 0;
	    events |= (latch & TCIC_SSTAT_LBAT2) ? SS_BATWARN : 0;
	}
	if (events)
	    socket_table[i].handler(socket_table[i].info, events);
    }

    /* Schedule next poll, if needed */
    if (((cs_irq == 0) || quick) && (!tcic_timer_pending)) {
	poll_timer.expires = RUN_AT(quick ? poll_quick : poll_interval);
	add_timer(&poll_timer);
	tcic_timer_pending = 1;
    }
    active = 0;
    
    DEBUG(2, "tcic: interrupt done\n");
    
} /* tcic_interrupt */

static void tcic_timer(u_long data)
{
    DEBUG(2, "tcic: tcic_timer()\n");
    tcic_timer_pending = 0;
    tcic_interrupt IRQ(0, NULL, NULL);
} /* tcic_timer */

/*====================================================================*/

static int tcic_register_callback(u_short lsock, ss_callback_t *call)
{
    if (call == NULL) {
	socket_table[lsock].handler = NULL;
	MOD_DEC_USE_COUNT;
    } else {
	MOD_INC_USE_COUNT;
	socket_table[lsock].handler = call->handler;
	socket_table[lsock].info = call->info;
    }
    return 0;
} /* tcic_register_callback */

/*====================================================================*/

static int tcic_get_status(u_short lsock, u_int *value)
{
    u_short psock = socket_table[lsock].psock;
    u_char reg;

    tcic_setl(TCIC_ADDR, (psock << TCIC_ADDR_SS_SHFT)
	      | TCIC_ADDR_INDREG | TCIC_SCF1(psock));
    reg = tcic_getb(TCIC_SSTAT);
    *value  = (reg & TCIC_SSTAT_CD) ? SS_DETECT : 0;
    *value |= (reg & TCIC_SSTAT_WP) ? SS_WRPROT : 0;
    if (tcic_getw(TCIC_DATA) & TCIC_SCF1_IOSTS) {
	*value |= (reg & TCIC_SSTAT_LBAT1) ? SS_STSCHG : 0;
    } else {
	*value |= (reg & TCIC_SSTAT_RDY) ? SS_READY : 0;
	*value |= (reg & TCIC_SSTAT_LBAT1) ? SS_BATDEAD : 0;
	*value |= (reg & TCIC_SSTAT_LBAT2) ? SS_BATWARN : 0;
    }
    reg = tcic_getb(TCIC_PWR);
    if (reg & (TCIC_PWR_VCC(psock)|TCIC_PWR_VPP(psock)))
	*value |= SS_POWERON;
    DEBUG(1, "tcic: GetStatus(%d) = %#2.2x\n", lsock, *value);
    return 0;
} /* tcic_get_status */
  
/*====================================================================*/

static int tcic_inquire_socket(u_short lsock, socket_cap_t *cap)
{
    *cap = tcic_cap;
    return 0;
} /* tcic_inquire_socket */

/*====================================================================*/

static int tcic_get_socket(u_short lsock, socket_state_t *state)
{
    u_short psock = socket_table[lsock].psock;
    u_char reg;
    u_short scf1, scf2;
    
    tcic_setl(TCIC_ADDR, (psock << TCIC_ADDR_SS_SHFT)
	      | TCIC_ADDR_INDREG | TCIC_SCF1(psock));
    scf1 = tcic_getw(TCIC_DATA);
    state->flags = (scf1 & TCIC_SCF1_IOSTS) ? SS_IOCARD : 0;
    state->flags |= (scf1 & TCIC_SCF1_DMA_MASK) ? SS_DMA_MODE : 0;
    state->flags |= (scf1 & TCIC_SCF1_SPKR) ? SS_SPKR_ENA : 0;
    if (tcic_getb(TCIC_SCTRL) & TCIC_SCTRL_ENA)
	state->flags |= SS_OUTPUT_ENA;
    state->io_irq = scf1 & TCIC_SCF1_IRQ_MASK;
    if (state->io_irq == 1) state->io_irq = 11;

    reg = tcic_getb(TCIC_PWR);
    state->Vcc = state->Vpp = 0;
    if (reg & TCIC_PWR_VCC(psock)) {
	if (reg & TCIC_PWR_VPP(psock))
	    state->Vcc = 50;
	else
	    state->Vcc = state->Vpp = 50;
    } else {
	if (reg & TCIC_PWR_VPP(psock)) {
	    state->Vcc = 50;
	    state->Vpp = 120;
	}
    }
    reg = tcic_aux_getb(TCIC_AUX_ILOCK);
    state->flags |= (reg & TCIC_ILOCK_CRESET) ? SS_RESET : 0;

    /* Card status change interrupt mask */
    tcic_setw(TCIC_ADDR, TCIC_SCF2(psock));
    scf2 = tcic_getw(TCIC_DATA);
    state->csc_mask = (scf2 & TCIC_SCF2_MCD) ? 0 : SS_DETECT;
    if (state->flags & SS_IOCARD) {
	state->csc_mask |= (scf2 & TCIC_SCF2_MLBAT1) ? 0 : SS_STSCHG;
    } else {
	state->csc_mask |= (scf2 & TCIC_SCF2_MLBAT1) ? 0 : SS_BATDEAD;
	state->csc_mask |= (scf2 & TCIC_SCF2_MLBAT2) ? 0 : SS_BATWARN;
	state->csc_mask |= (scf2 & TCIC_SCF2_MRDY) ? 0 : SS_READY;
    }

    DEBUG(1, "tcic: GetSocket(%d) = flags %#3.3x, Vcc %d, Vpp %d, "
	  "io_irq %d, csc_mask %#2.2x\n", lsock, state->flags,
	  state->Vcc, state->Vpp, state->io_irq, state->csc_mask);
    return 0;
} /* tcic_get_socket */

/*====================================================================*/

static int tcic_set_socket(u_short lsock, socket_state_t *state)
{
    u_short psock = socket_table[lsock].psock;
    u_char reg;
    u_short scf1, scf2;

    DEBUG(1, "tcic: SetSocket(%d, flags %#3.3x, Vcc %d, Vpp %d, "
	  "io_irq %d, csc_mask %#2.2x)\n", lsock, state->flags,
	  state->Vcc, state->Vpp, state->io_irq, state->csc_mask);
    tcic_setw(TCIC_ADDR+2, (psock << TCIC_SS_SHFT) | TCIC_ADR2_INDREG);

    reg = tcic_getb(TCIC_PWR);
    reg &= ~(TCIC_PWR_VCC(psock) | TCIC_PWR_VPP(psock));

    if (state->Vcc == 50) {
	switch (state->Vpp) {
	case 0:   reg |= TCIC_PWR_VCC(psock) | TCIC_PWR_VPP(psock); break;
	case 50:  reg |= TCIC_PWR_VCC(psock); break;
	case 120: reg |= TCIC_PWR_VPP(psock); break;
	default:  return -EINVAL;
	}
    } else if (state->Vcc != 0)
	return -EINVAL;

    if (reg != tcic_getb(TCIC_PWR))
	tcic_setb(TCIC_PWR, reg);

    reg = TCIC_ILOCK_HOLD_CCLK | TCIC_ILOCK_CWAIT;
    if (state->flags & SS_OUTPUT_ENA) {
	tcic_setb(TCIC_SCTRL, TCIC_SCTRL_ENA);
	reg |= TCIC_ILOCK_CRESENA;
    } else
	tcic_setb(TCIC_SCTRL, 0);
    if (state->flags & SS_RESET)
	reg |= TCIC_ILOCK_CRESET;
    tcic_aux_setb(TCIC_AUX_ILOCK, reg);
    
    tcic_setw(TCIC_ADDR, TCIC_SCF1(psock));
    scf1 = TCIC_SCF1_FINPACK;
    scf1 |= ((state->io_irq == 11) ? 1 : state->io_irq);
    if (state->flags & SS_IOCARD) {
	scf1 |= TCIC_SCF1_IOSTS;
	if (state->flags & SS_SPKR_ENA)
	    scf1 |= TCIC_SCF1_SPKR;
	if (state->flags & SS_DMA_MODE)
	    scf1 |= TCIC_SCF1_DREQ2 << TCIC_SCF1_DMA_SHIFT;
    }
    tcic_setw(TCIC_DATA, scf1);

    /* Some general setup stuff, and configure status interrupt */
    reg = TCIC_WAIT_ASYNC | TCIC_WAIT_SENSE | to_cycles(250);
    tcic_aux_setb(TCIC_AUX_WCTL, reg);
    tcic_aux_setw(TCIC_AUX_SYSCFG, TCIC_SYSCFG_AUTOBUSY|0x0a00|
		  ((cs_irq == 11) ? 1 : cs_irq));
    
    /* Card status change interrupt mask */
    tcic_setw(TCIC_ADDR, TCIC_SCF2(psock));
    scf2 = TCIC_SCF2_MALL;
    if (state->csc_mask & SS_DETECT) scf2 &= ~TCIC_SCF2_MCD;
    if (state->flags & SS_IOCARD) {
	if (state->csc_mask & SS_STSCHG) reg &= ~TCIC_SCF2_MLBAT1;
    } else {
	if (state->csc_mask & SS_BATDEAD) reg &= ~TCIC_SCF2_MLBAT1;
	if (state->csc_mask & SS_BATWARN) reg &= ~TCIC_SCF2_MLBAT2;
	if (state->csc_mask & SS_READY) reg &= ~TCIC_SCF2_MRDY;
    }
    tcic_setw(TCIC_DATA, scf2);
    /* For the ISA bus, the irq should be active-high totem-pole */
    tcic_setb(TCIC_IENA, TCIC_IENA_CDCHG | TCIC_IENA_CFG_HIGH);

    return 0;
} /* tcic_set_socket */
  
/*====================================================================*/

static int tcic_get_io_map(u_short lsock, struct pccard_io_map *io)
{
    u_short psock = socket_table[lsock].psock;
    u_short base, ioctl;
    u_int addr;
    
    if (io->map > 1) return -EINVAL;
    tcic_setw(TCIC_ADDR+2, TCIC_ADR2_INDREG | (psock << TCIC_SS_SHFT));
    addr = TCIC_IWIN(psock, io->map);
    tcic_setw(TCIC_ADDR, addr + TCIC_IBASE_X);
    base = tcic_getw(TCIC_DATA);
    tcic_setw(TCIC_ADDR, addr + TCIC_ICTL_X);
    ioctl = tcic_getw(TCIC_DATA);

    if (ioctl & TCIC_ICTL_TINY)
	io->start = io->stop = base;
    else {
	io->start = base & (base-1);
	io->stop = io->start + (base ^ (base-1));
    }
    io->speed = to_ns(ioctl & TCIC_ICTL_WSCNT_MASK);
    io->flags  = (ioctl & TCIC_ICTL_ENA) ? MAP_ACTIVE : 0;
    switch (ioctl & TCIC_ICTL_BW_MASK) {
    case TCIC_ICTL_BW_DYN:
	io->flags |= MAP_AUTOSZ; break;
    case TCIC_ICTL_BW_16:
	io->flags |= MAP_16BIT; break;
    default:
	break;
    }
    DEBUG(1, "tcic: GetIOMap(%d, %d) = %#2.2x, %d ns, "
	  "%#4.4x-%#4.4x\n", lsock, io->map, io->flags,
	  io->speed, io->start, io->stop);
    return 0;
} /* tcic_get_io_map */

/*====================================================================*/

static int tcic_set_io_map(u_short lsock, struct pccard_io_map *io)
{
    u_short psock = socket_table[lsock].psock;
    u_int addr;
    u_short base, len, ioctl;
    
    DEBUG(1, "tcic: SetIOMap(%d, %d, %#2.2x, %d ns, "
	  "%#4.4x-%#4.4x)\n", lsock, io->map, io->flags,
	  io->speed, io->start, io->stop);
    if ((io->map > 1) || (io->start > 0xffff) || (io->stop > 0xffff) ||
	(io->stop < io->start)) return -EINVAL;
    tcic_setw(TCIC_ADDR+2, TCIC_ADR2_INDREG | (psock << TCIC_SS_SHFT));
    addr = TCIC_IWIN(psock, io->map);

    base = io->start; len = io->stop - io->start;
    /* Check to see that len+1 is power of two, etc */
    if ((len & (len+1)) || (base & len)) return -EINVAL;
    base |= (len+1)>>1;
    tcic_setw(TCIC_ADDR, addr + TCIC_IBASE_X);
    tcic_setw(TCIC_DATA, base);
    
    ioctl  = (psock << TCIC_ICTL_SS_SHFT);
    ioctl |= (len == 0) ? TCIC_ICTL_TINY : 0;
    ioctl |= (io->flags & MAP_ACTIVE) ? TCIC_ICTL_ENA : 0;
    ioctl |= to_cycles(io->speed) & TCIC_ICTL_WSCNT_MASK;
    if (!(io->flags & MAP_AUTOSZ)) {
	ioctl |= TCIC_ICTL_QUIET;
	ioctl |= (io->flags & MAP_16BIT) ? TCIC_ICTL_BW_16 : TCIC_ICTL_BW_8;
    }
    tcic_setw(TCIC_ADDR, addr + TCIC_ICTL_X);
    tcic_setw(TCIC_DATA, ioctl);
    
    return 0;
} /* tcic_set_io_map */

/*====================================================================*/

static int tcic_get_mem_map(u_short lsock, struct pccard_mem_map *mem)
{
    u_short psock = socket_table[lsock].psock;
    u_short addr, ctl;
    u_long base, mmap;
    
    if (mem->map > 3) return -EINVAL;
    tcic_setw(TCIC_ADDR+2, TCIC_ADR2_INDREG | (psock << TCIC_SS_SHFT));
    addr = TCIC_MWIN(psock, mem->map);
    
    tcic_setw(TCIC_ADDR, addr + TCIC_MBASE_X);
    base = tcic_getw(TCIC_DATA);
    if (base & TCIC_MBASE_4K_BIT) {
	mem->sys_start = base & TCIC_MBASE_HA_MASK;
	mem->sys_stop = mem->sys_start;
    } else {
	base &= TCIC_MBASE_HA_MASK;
	mem->sys_start = (base & (base-1));
	mem->sys_stop = mem->sys_start + (base ^ (base-1));
    }
    mem->sys_start = mem->sys_start << TCIC_MBASE_HA_SHFT;
    mem->sys_stop = (mem->sys_stop << TCIC_MBASE_HA_SHFT) + 0x0fff;
    
    tcic_setw(TCIC_ADDR, addr + TCIC_MMAP_X);
    mmap = tcic_getw(TCIC_DATA);
    mem->flags = (mmap & TCIC_MMAP_REG) ? MAP_ATTRIB : 0;
    mmap &= TCIC_MMAP_CA_MASK;
    mem->card_start = mem->sys_start + (mmap << TCIC_MMAP_CA_SHFT);
    mem->card_start &= 0x3ffffff;
    
    tcic_setw(TCIC_ADDR, addr + TCIC_MCTL_X);
    ctl = tcic_getw(TCIC_DATA);
    mem->flags |= (ctl & TCIC_MCTL_ENA) ? MAP_ACTIVE : 0;
    mem->flags |= (ctl & TCIC_MCTL_B8) ? 0 : MAP_16BIT;
    mem->flags |= (ctl & TCIC_MCTL_WP) ? MAP_WRPROT : 0;
    mem->speed = to_ns(ctl & TCIC_MCTL_WSCNT_MASK);
    
    DEBUG(1, "tcic: GetMemMap(%d, %d) = %#2.2x, %d ns, "
	  "%#5.5lx-%#5.5lx, %#5.5x\n", lsock, mem->map, mem->flags,
	  mem->speed, mem->sys_start, mem->sys_stop, mem->card_start);
    return 0;
} /* tcic_get_mem_map */

/*====================================================================*/
  
static int tcic_set_mem_map(u_short lsock, struct pccard_mem_map *mem)
{
    u_short psock = socket_table[lsock].psock;
    u_short addr, ctl;
    u_long base, len, mmap;

    DEBUG(1, "tcic: SetMemMap(%d, %d, %#2.2x, %d ns, "
	  "%#5.5lx-%#5.5lx, %#5.5x)\n", lsock, mem->map, mem->flags,
	  mem->speed, mem->sys_start, mem->sys_stop, mem->card_start);
    if ((mem->map > 3) || (mem->card_start > 0x3ffffff) ||
	(mem->sys_start > 0xffffff) || (mem->sys_stop > 0xffffff) ||
	(mem->sys_start > mem->sys_stop) || (mem->speed > 1000))
	return -EINVAL;
    tcic_setw(TCIC_ADDR+2, TCIC_ADR2_INDREG | (psock << TCIC_SS_SHFT));
    addr = TCIC_MWIN(psock, mem->map);

    base = mem->sys_start; len = mem->sys_stop - mem->sys_start;
    if ((len & (len+1)) || (base & len)) return -EINVAL;
    if (len == 0x0fff)
	base = (base >> TCIC_MBASE_HA_SHFT) | TCIC_MBASE_4K_BIT;
    else
	base = (base | (len+1)>>1) >> TCIC_MBASE_HA_SHFT;
    tcic_setw(TCIC_ADDR, addr + TCIC_MBASE_X);
    tcic_setw(TCIC_DATA, base);
    
    mmap = mem->card_start - mem->sys_start;
    mmap = (mmap >> TCIC_MMAP_CA_SHFT) & TCIC_MMAP_CA_MASK;
    if (mem->flags & MAP_ATTRIB) mmap |= TCIC_MMAP_REG;
    tcic_setw(TCIC_ADDR, addr + TCIC_MMAP_X);
    tcic_setw(TCIC_DATA, mmap);

    ctl  = TCIC_MCTL_QUIET | (psock << TCIC_MCTL_SS_SHFT);
    ctl |= to_cycles(mem->speed) & TCIC_MCTL_WSCNT_MASK;
    ctl |= (mem->flags & MAP_16BIT) ? 0 : TCIC_MCTL_B8;
    ctl |= (mem->flags & MAP_WRPROT) ? TCIC_MCTL_WP : 0;
    ctl |= (mem->flags & MAP_ACTIVE) ? TCIC_MCTL_ENA : 0;
    tcic_setw(TCIC_ADDR, addr + TCIC_MCTL_X);
    tcic_setw(TCIC_DATA, ctl);
    
    return 0;
} /* tcic_set_mem_map */

/*====================================================================*/

typedef int (*subfn_t)(u_short, void *);
    
static subfn_t service_table[] = {
    (subfn_t)&tcic_register_callback,
    (subfn_t)&tcic_inquire_socket,
    (subfn_t)&tcic_get_status,
    (subfn_t)&tcic_get_socket,
    (subfn_t)&tcic_set_socket,
    (subfn_t)&tcic_get_io_map,
    (subfn_t)&tcic_set_io_map,
    (subfn_t)&tcic_get_mem_map,
    (subfn_t)&tcic_set_mem_map,
};

#define NFUNC (sizeof(service_table)/sizeof(subfn_t))

static int tcic_service(u_int lsock, u_int cmd, void *arg)
{
    int err;

    DEBUG(2, "tcic_service(%d, %d, 0x%p)\n", lsock, cmd, arg);

    if (cmd < NFUNC)
	err = service_table[cmd](lsock, arg);
    else
	err = -EINVAL;

    return err;
} /* tcic_service */

/*====================================================================*/

int init_module(void)
{
    servinfo_t serv;
    CardServices(GetCardServicesInfo, &serv);
    if (serv.Revision != CS_RELEASE_CODE) {
	printk(KERN_NOTICE "tcic: Card Services release "
	       "does not match!\n");
	return -1;
    }
    return tcic_init();
}

void cleanup_module(void)
{
    tcic_finish();
}