Linux-2.6.12-rc2

[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / pcmcia / yenta_socket.c

/*
 * Regular cardbus driver ("yenta_socket")
 *
 * (C) Copyright 1999, 2000 Linus Torvalds
 *
 * Changelog:
 * Aug 2002: Manfred Spraul <manfred@colorfullife.com>
 *      Dynamically adjust the size of the bridge resource
 *      
 * May 2003: Dominik Brodowski <linux@brodo.de>
 *      Merge pci_socket.c and yenta.c into one file
 */
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/module.h>

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

#include <asm/io.h>

#include "yenta_socket.h"
#include "i82365.h"

static int disable_clkrun;
module_param(disable_clkrun, bool, 0444);
MODULE_PARM_DESC(disable_clkrun, "If PC card doesn't function properly, please try this option");

#if 0
#define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args)
#else
#define debug(x,args...)
#endif

/* Don't ask.. */
#define to_cycles(ns)   ((ns)/120)
#define to_ns(cycles)   ((cycles)*120)

static int yenta_probe_cb_irq(struct yenta_socket *socket);


static unsigned int override_bios;
module_param(override_bios, uint, 0000);
MODULE_PARM_DESC (override_bios, "yenta ignore bios resource allocation");

/*
 * Generate easy-to-use ways of reading a cardbus sockets
 * regular memory space ("cb_xxx"), configuration space
 * ("config_xxx") and compatibility space ("exca_xxxx")
 */
static inline u32 cb_readl(struct yenta_socket *socket, unsigned reg)
{
        u32 val = readl(socket->base + reg);
        debug("%p %04x %08x\n", socket, reg, val);
        return val;
}

static inline void cb_writel(struct yenta_socket *socket, unsigned reg, u32 val)
{
        debug("%p %04x %08x\n", socket, reg, val);
        writel(val, socket->base + reg);
}

static inline u8 config_readb(struct yenta_socket *socket, unsigned offset)
{
        u8 val;
        pci_read_config_byte(socket->dev, offset, &val);
        debug("%p %04x %02x\n", socket, offset, val);
        return val;
}

static inline u16 config_readw(struct yenta_socket *socket, unsigned offset)
{
        u16 val;
        pci_read_config_word(socket->dev, offset, &val);
        debug("%p %04x %04x\n", socket, offset, val);
        return val;
}

static inline u32 config_readl(struct yenta_socket *socket, unsigned offset)
{
        u32 val;
        pci_read_config_dword(socket->dev, offset, &val);
        debug("%p %04x %08x\n", socket, offset, val);
        return val;
}

static inline void config_writeb(struct yenta_socket *socket, unsigned offset, u8 val)
{
        debug("%p %04x %02x\n", socket, offset, val);
        pci_write_config_byte(socket->dev, offset, val);
}

static inline void config_writew(struct yenta_socket *socket, unsigned offset, u16 val)
{
        debug("%p %04x %04x\n", socket, offset, val);
        pci_write_config_word(socket->dev, offset, val);
}

static inline void config_writel(struct yenta_socket *socket, unsigned offset, u32 val)
{
        debug("%p %04x %08x\n", socket, offset, val);
        pci_write_config_dword(socket->dev, offset, val);
}

static inline u8 exca_readb(struct yenta_socket *socket, unsigned reg)
{
        u8 val = readb(socket->base + 0x800 + reg);
        debug("%p %04x %02x\n", socket, reg, val);
        return val;
}

static inline u8 exca_readw(struct yenta_socket *socket, unsigned reg)
{
        u16 val;
        val = readb(socket->base + 0x800 + reg);
        val |= readb(socket->base + 0x800 + reg + 1) << 8;
        debug("%p %04x %04x\n", socket, reg, val);
        return val;
}

static inline void exca_writeb(struct yenta_socket *socket, unsigned reg, u8 val)
{
        debug("%p %04x %02x\n", socket, reg, val);
        writeb(val, socket->base + 0x800 + reg);
}

static void exca_writew(struct yenta_socket *socket, unsigned reg, u16 val)
{
        debug("%p %04x %04x\n", socket, reg, val);
        writeb(val, socket->base + 0x800 + reg);
        writeb(val >> 8, socket->base + 0x800 + reg + 1);
}

/*
 * Ugh, mixed-mode cardbus and 16-bit pccard state: things depend
 * on what kind of card is inserted..
 */
static int yenta_get_status(struct pcmcia_socket *sock, unsigned int *value)
{
        struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
        unsigned int val;
        u32 state = cb_readl(socket, CB_SOCKET_STATE);

        val  = (state & CB_3VCARD) ? SS_3VCARD : 0;
        val |= (state & CB_XVCARD) ? SS_XVCARD : 0;
        val |= (state & (CB_CDETECT1 | CB_CDETECT2 | CB_5VCARD | CB_3VCARD
                         | CB_XVCARD | CB_YVCARD)) ? 0 : SS_PENDING;

        if (state & CB_CBCARD) {
                val |= SS_CARDBUS;      
                val |= (state & CB_CARDSTS) ? SS_STSCHG : 0;
                val |= (state & (CB_CDETECT1 | CB_CDETECT2)) ? 0 : SS_DETECT;
                val |= (state & CB_PWRCYCLE) ? SS_POWERON | SS_READY : 0;
        } else {
                u8 status = exca_readb(socket, I365_STATUS);
                val |= ((status & I365_CS_DETECT) == I365_CS_DETECT) ? SS_DETECT : 0;
                if (exca_readb(socket, I365_INTCTL) & I365_PC_IOCARD) {
                        val |= (status & I365_CS_STSCHG) ? 0 : SS_STSCHG;
                } else {
                        val |= (status & I365_CS_BVD1) ? 0 : SS_BATDEAD;
                        val |= (status & I365_CS_BVD2) ? 0 : SS_BATWARN;
                }
                val |= (status & I365_CS_WRPROT) ? SS_WRPROT : 0;
                val |= (status & I365_CS_READY) ? SS_READY : 0;
                val |= (status & I365_CS_POWERON) ? SS_POWERON : 0;
        }

        *value = val;
        return 0;
}

static int yenta_Vcc_power(u32 control)
{
        switch (control & CB_SC_VCC_MASK) {
        case CB_SC_VCC_5V: return 50;
        case CB_SC_VCC_3V: return 33;
        default: return 0;
        }
}

static int yenta_Vpp_power(u32 control)
{
        switch (control & CB_SC_VPP_MASK) {
        case CB_SC_VPP_12V: return 120;
        case CB_SC_VPP_5V: return 50;
        case CB_SC_VPP_3V: return 33;
        default: return 0;
        }
}

static int yenta_get_socket(struct pcmcia_socket *sock, socket_state_t *state)
{
        struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
        u8 reg;
        u32 control;

        control = cb_readl(socket, CB_SOCKET_CONTROL);

        state->Vcc = yenta_Vcc_power(control);
        state->Vpp = yenta_Vpp_power(control);
        state->io_irq = socket->io_irq;

        if (cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) {
                u16 bridge = config_readw(socket, CB_BRIDGE_CONTROL);
                if (bridge & CB_BRIDGE_CRST)
                        state->flags |= SS_RESET;
                return 0;
        }

        /* 16-bit card state.. */
        reg = exca_readb(socket, I365_POWER);
        state->flags = (reg & I365_PWR_AUTO) ? SS_PWR_AUTO : 0;
        state->flags |= (reg & I365_PWR_OUT) ? SS_OUTPUT_ENA : 0;

        reg = exca_readb(socket, I365_INTCTL);
        state->flags |= (reg & I365_PC_RESET) ? 0 : SS_RESET;
        state->flags |= (reg & I365_PC_IOCARD) ? SS_IOCARD : 0;

        reg = exca_readb(socket, I365_CSCINT);
        state->csc_mask = (reg & I365_CSC_DETECT) ? SS_DETECT : 0;
        if (state->flags & SS_IOCARD) {
                state->csc_mask |= (reg & I365_CSC_STSCHG) ? SS_STSCHG : 0;
        } else {
                state->csc_mask |= (reg & I365_CSC_BVD1) ? SS_BATDEAD : 0;
                state->csc_mask |= (reg & I365_CSC_BVD2) ? SS_BATWARN : 0;
                state->csc_mask |= (reg & I365_CSC_READY) ? SS_READY : 0;
        }

        return 0;
}

static void yenta_set_power(struct yenta_socket *socket, socket_state_t *state)
{
        u32 reg = 0;    /* CB_SC_STPCLK? */
        switch (state->Vcc) {
        case 33: reg = CB_SC_VCC_3V; break;
        case 50: reg = CB_SC_VCC_5V; break;
        default: reg = 0; break;
        }
        switch (state->Vpp) {
        case 33:  reg |= CB_SC_VPP_3V; break;
        case 50:  reg |= CB_SC_VPP_5V; break;
        case 120: reg |= CB_SC_VPP_12V; break;
        }
        if (reg != cb_readl(socket, CB_SOCKET_CONTROL))
                cb_writel(socket, CB_SOCKET_CONTROL, reg);
}

static int yenta_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
{
        struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
        u16 bridge;

        yenta_set_power(socket, state);
        socket->io_irq = state->io_irq;
        bridge = config_readw(socket, CB_BRIDGE_CONTROL) & ~(CB_BRIDGE_CRST | CB_BRIDGE_INTR);
        if (cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) {
                u8 intr;
                bridge |= (state->flags & SS_RESET) ? CB_BRIDGE_CRST : 0;

                /* ISA interrupt control? */
                intr = exca_readb(socket, I365_INTCTL);
                intr = (intr & ~0xf);
                if (!socket->cb_irq) {
                        intr |= state->io_irq;
                        bridge |= CB_BRIDGE_INTR;
                }
                exca_writeb(socket, I365_INTCTL, intr);
        }  else {
                u8 reg;

                reg = exca_readb(socket, I365_INTCTL) & (I365_RING_ENA | I365_INTR_ENA);
                reg |= (state->flags & SS_RESET) ? 0 : I365_PC_RESET;
                reg |= (state->flags & SS_IOCARD) ? I365_PC_IOCARD : 0;
                if (state->io_irq != socket->cb_irq) {
                        reg |= state->io_irq;
                        bridge |= CB_BRIDGE_INTR;
                }
                exca_writeb(socket, I365_INTCTL, reg);

                reg = exca_readb(socket, I365_POWER) & (I365_VCC_MASK|I365_VPP1_MASK);
                reg |= I365_PWR_NORESET;
                if (state->flags & SS_PWR_AUTO) reg |= I365_PWR_AUTO;
                if (state->flags & SS_OUTPUT_ENA) reg |= I365_PWR_OUT;
                if (exca_readb(socket, I365_POWER) != reg)
                        exca_writeb(socket, I365_POWER, reg);

                /* CSC interrupt: no ISA irq for CSC */
                reg = I365_CSC_DETECT;
                if (state->flags & SS_IOCARD) {
                        if (state->csc_mask & SS_STSCHG) reg |= I365_CSC_STSCHG;
                } else {
                        if (state->csc_mask & SS_BATDEAD) reg |= I365_CSC_BVD1;
                        if (state->csc_mask & SS_BATWARN) reg |= I365_CSC_BVD2;
                        if (state->csc_mask & SS_READY) reg |= I365_CSC_READY;
                }
                exca_writeb(socket, I365_CSCINT, reg);
                exca_readb(socket, I365_CSC);
                if(sock->zoom_video)
                        sock->zoom_video(sock, state->flags & SS_ZVCARD);
        }
        config_writew(socket, CB_BRIDGE_CONTROL, bridge);
        /* Socket event mask: get card insert/remove events.. */
        cb_writel(socket, CB_SOCKET_EVENT, -1);
        cb_writel(socket, CB_SOCKET_MASK, CB_CDMASK);
        return 0;
}

static int yenta_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *io)
{
        struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
        int map;
        unsigned char ioctl, addr, enable;

        map = io->map;

        if (map > 1)
                return -EINVAL;

        enable = I365_ENA_IO(map);
        addr = exca_readb(socket, I365_ADDRWIN);

        /* Disable the window before changing it.. */
        if (addr & enable) {
                addr &= ~enable;
                exca_writeb(socket, I365_ADDRWIN, addr);
        }

        exca_writew(socket, I365_IO(map)+I365_W_START, io->start);
        exca_writew(socket, I365_IO(map)+I365_W_STOP, io->stop);

        ioctl = exca_readb(socket, I365_IOCTL) & ~I365_IOCTL_MASK(map);
        if (io->flags & MAP_0WS) ioctl |= I365_IOCTL_0WS(map);
        if (io->flags & MAP_16BIT) ioctl |= I365_IOCTL_16BIT(map);
        if (io->flags & MAP_AUTOSZ) ioctl |= I365_IOCTL_IOCS16(map);
        exca_writeb(socket, I365_IOCTL, ioctl);

        if (io->flags & MAP_ACTIVE)
                exca_writeb(socket, I365_ADDRWIN, addr | enable);
        return 0;
}

static int yenta_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *mem)
{
        struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
        struct pci_bus_region region;
        int map;
        unsigned char addr, enable;
        unsigned int start, stop, card_start;
        unsigned short word;

        pcibios_resource_to_bus(socket->dev, &region, mem->res);

        map = mem->map;
        start = region.start;
        stop = region.end;
        card_start = mem->card_start;

        if (map > 4 || start > stop || ((start ^ stop) >> 24) ||
            (card_start >> 26) || mem->speed > 1000)
                return -EINVAL;

        enable = I365_ENA_MEM(map);
        addr = exca_readb(socket, I365_ADDRWIN);
        if (addr & enable) {
                addr &= ~enable;
                exca_writeb(socket, I365_ADDRWIN, addr);
        }

        exca_writeb(socket, CB_MEM_PAGE(map), start >> 24);

        word = (start >> 12) & 0x0fff;
        if (mem->flags & MAP_16BIT)
                word |= I365_MEM_16BIT;
        if (mem->flags & MAP_0WS)
                word |= I365_MEM_0WS;
        exca_writew(socket, I365_MEM(map) + I365_W_START, word);

        word = (stop >> 12) & 0x0fff;
        switch (to_cycles(mem->speed)) {
                case 0: break;
                case 1:  word |= I365_MEM_WS0; break;
                case 2:  word |= I365_MEM_WS1; break;
                default: word |= I365_MEM_WS1 | I365_MEM_WS0; break;
        }
        exca_writew(socket, I365_MEM(map) + I365_W_STOP, word);

        word = ((card_start - start) >> 12) & 0x3fff;
        if (mem->flags & MAP_WRPROT)
                word |= I365_MEM_WRPROT;
        if (mem->flags & MAP_ATTRIB)
                word |= I365_MEM_REG;
        exca_writew(socket, I365_MEM(map) + I365_W_OFF, word);

        if (mem->flags & MAP_ACTIVE)
                exca_writeb(socket, I365_ADDRWIN, addr | enable);
        return 0;
}


static unsigned int yenta_events(struct yenta_socket *socket)
{
        u8 csc;
        u32 cb_event;
        unsigned int events;

        /* Clear interrupt status for the event */
        cb_event = cb_readl(socket, CB_SOCKET_EVENT);
        cb_writel(socket, CB_SOCKET_EVENT, cb_event);

        csc = exca_readb(socket, I365_CSC);

        events = (cb_event & (CB_CD1EVENT | CB_CD2EVENT)) ? SS_DETECT : 0 ;
        events |= (csc & I365_CSC_DETECT) ? SS_DETECT : 0;
        if (exca_readb(socket, I365_INTCTL) & I365_PC_IOCARD) {
                events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0;
        } else {
                events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
                events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
                events |= (csc & I365_CSC_READY) ? SS_READY : 0;
        }
        return events;
}


static irqreturn_t yenta_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
        unsigned int events;
        struct yenta_socket *socket = (struct yenta_socket *) dev_id;

        events = yenta_events(socket);
        if (events) {
                pcmcia_parse_events(&socket->socket, events);
                return IRQ_HANDLED;
        }
        return IRQ_NONE;
}

static void yenta_interrupt_wrapper(unsigned long data)
{
        struct yenta_socket *socket = (struct yenta_socket *) data;

        yenta_interrupt(0, (void *)socket, NULL);
        socket->poll_timer.expires = jiffies + HZ;
        add_timer(&socket->poll_timer);
}

static void yenta_clear_maps(struct yenta_socket *socket)
{
        int i;
        struct resource res = { .start = 0, .end = 0x0fff };
        pccard_io_map io = { 0, 0, 0, 0, 1 };
        pccard_mem_map mem = { .res = &res, };

        yenta_set_socket(&socket->socket, &dead_socket);
        for (i = 0; i < 2; i++) {
                io.map = i;
                yenta_set_io_map(&socket->socket, &io);
        }
        for (i = 0; i < 5; i++) {
                mem.map = i;
                yenta_set_mem_map(&socket->socket, &mem);
        }
}

/* Called at resume and initialization events */
static int yenta_sock_init(struct pcmcia_socket *sock)
{
        struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
        u32 state;
        u16 bridge;

        bridge = config_readw(socket, CB_BRIDGE_CONTROL) & ~CB_BRIDGE_INTR;
        if (!socket->cb_irq)
                bridge |= CB_BRIDGE_INTR;
        config_writew(socket, CB_BRIDGE_CONTROL, bridge);

        exca_writeb(socket, I365_GBLCTL, 0x00);
        exca_writeb(socket, I365_GENCTL, 0x00);

        /* Redo card voltage interrogation */
        state = cb_readl(socket, CB_SOCKET_STATE);
        if (!(state & (CB_CDETECT1 | CB_CDETECT2 | CB_5VCARD |
                       CB_3VCARD | CB_XVCARD | CB_YVCARD)))
                cb_writel(socket, CB_SOCKET_FORCE, CB_CVSTEST);

        yenta_clear_maps(socket);

        if (socket->type && socket->type->sock_init)
                socket->type->sock_init(socket);

        /* Re-enable CSC interrupts */
        cb_writel(socket, CB_SOCKET_MASK, CB_CDMASK);

        return 0;
}

static int yenta_sock_suspend(struct pcmcia_socket *sock)
{
        struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);

        /* Disable CSC interrupts */
        cb_writel(socket, CB_SOCKET_MASK, 0x0);

        return 0;
}

/*
 * Use an adaptive allocation for the memory resource,
 * sometimes the memory behind pci bridges is limited:
 * 1/8 of the size of the io window of the parent.
 * max 4 MB, min 16 kB.
 */
#define BRIDGE_MEM_MAX 4*1024*1024
#define BRIDGE_MEM_MIN 16*1024

#define BRIDGE_IO_MAX 256
#define BRIDGE_IO_MIN 32

#ifndef PCIBIOS_MIN_CARDBUS_IO
#define PCIBIOS_MIN_CARDBUS_IO PCIBIOS_MIN_IO
#endif

static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned type)
{
        struct pci_bus *bus;
        struct resource *root, *res;
        u32 start, end;
        u32 align, size, min;
        unsigned offset;
        unsigned mask;

        /* The granularity of the memory limit is 4kB, on IO it's 4 bytes */
        mask = ~0xfff;
        if (type & IORESOURCE_IO)
                mask = ~3;

        offset = 0x1c + 8*nr;
        bus = socket->dev->subordinate;
        res = socket->dev->resource + PCI_BRIDGE_RESOURCES + nr;
        res->name = bus->name;
        res->flags = type;
        res->start = 0;
        res->end = 0;
        root = pci_find_parent_resource(socket->dev, res);

        if (!root)
                return;

        start = config_readl(socket, offset) & mask;
        end = config_readl(socket, offset+4) | ~mask;
        if (start && end > start && !override_bios) {
                res->start = start;
                res->end = end;
                if (request_resource(root, res) == 0)
                        return;
                printk(KERN_INFO "yenta %s: Preassigned resource %d busy, reconfiguring...\n",
                                pci_name(socket->dev), nr);
                res->start = res->end = 0;
        }

        if (type & IORESOURCE_IO) {
                align = 1024;
                size = BRIDGE_IO_MAX;
                min = BRIDGE_IO_MIN;
                start = PCIBIOS_MIN_CARDBUS_IO;
                end = ~0U;
        } else {
                unsigned long avail = root->end - root->start;
                int i;
                size = BRIDGE_MEM_MAX;
                if (size > avail/8) {
                        size=(avail+1)/8;
                        /* round size down to next power of 2 */
                        i = 0;
                        while ((size /= 2) != 0)
                                i++;
                        size = 1 << i;
                }
                if (size < BRIDGE_MEM_MIN)
                        size = BRIDGE_MEM_MIN;
                min = BRIDGE_MEM_MIN;
                align = size;
                start = PCIBIOS_MIN_MEM;
                end = ~0U;
        }
        
        do {
                if (allocate_resource(root, res, size, start, end, align, NULL, NULL)==0) {
                        config_writel(socket, offset, res->start);
                        config_writel(socket, offset+4, res->end);
                        return;
                }
                size = size/2;
                align = size;
        } while (size >= min);
        printk(KERN_INFO "yenta %s: no resource of type %x available, trying to continue...\n",
                        pci_name(socket->dev), type);
        res->start = res->end = 0;
}

/*
 * Allocate the bridge mappings for the device..
 */
static void yenta_allocate_resources(struct yenta_socket *socket)
{
        yenta_allocate_res(socket, 0, IORESOURCE_MEM|IORESOURCE_PREFETCH);
        yenta_allocate_res(socket, 1, IORESOURCE_MEM);
        yenta_allocate_res(socket, 2, IORESOURCE_IO);
        yenta_allocate_res(socket, 3, IORESOURCE_IO);   /* PCI isn't clever enough to use this one yet */
}


/*
 * Free the bridge mappings for the device..
 */
static void yenta_free_resources(struct yenta_socket *socket)
{
        int i;
        for (i=0;i<4;i++) {
                struct resource *res;
                res = socket->dev->resource + PCI_BRIDGE_RESOURCES + i;
                if (res->start != 0 && res->end != 0)
                        release_resource(res);
                res->start = res->end = 0;
        }
}


/*
 * Close it down - release our resources and go home..
 */
static void yenta_close(struct pci_dev *dev)
{
        struct yenta_socket *sock = pci_get_drvdata(dev);

        /* we don't want a dying socket registered */
        pcmcia_unregister_socket(&sock->socket);
        
        /* Disable all events so we don't die in an IRQ storm */
        cb_writel(sock, CB_SOCKET_MASK, 0x0);
        exca_writeb(sock, I365_CSCINT, 0);

        if (sock->cb_irq)
                free_irq(sock->cb_irq, sock);
        else
                del_timer_sync(&sock->poll_timer);

        if (sock->base)
                iounmap(sock->base);
        yenta_free_resources(sock);

        pci_release_regions(dev);
        pci_disable_device(dev);
        pci_set_drvdata(dev, NULL);
}


static struct pccard_operations yenta_socket_operations = {
        .init                   = yenta_sock_init,
        .suspend                = yenta_sock_suspend,
        .get_status             = yenta_get_status,
        .get_socket             = yenta_get_socket,
        .set_socket             = yenta_set_socket,
        .set_io_map             = yenta_set_io_map,
        .set_mem_map            = yenta_set_mem_map,
};


#include "ti113x.h"
#include "ricoh.h"
#include "topic.h"
#include "o2micro.h"

enum {
        CARDBUS_TYPE_DEFAULT = -1,
        CARDBUS_TYPE_TI,
        CARDBUS_TYPE_TI113X,
        CARDBUS_TYPE_TI12XX,
        CARDBUS_TYPE_TI1250,
        CARDBUS_TYPE_RICOH,
        CARDBUS_TYPE_TOPIC97,
        CARDBUS_TYPE_O2MICRO,
};

/*
 * Different cardbus controllers have slightly different
 * initialization sequences etc details. List them here..
 */
static struct cardbus_type cardbus_type[] = {
        [CARDBUS_TYPE_TI]       = {
                .override       = ti_override,
                .save_state     = ti_save_state,
                .restore_state  = ti_restore_state,
                .sock_init      = ti_init,
        },
        [CARDBUS_TYPE_TI113X]   = {
                .override       = ti113x_override,
                .save_state     = ti_save_state,
                .restore_state  = ti_restore_state,
                .sock_init      = ti_init,
        },
        [CARDBUS_TYPE_TI12XX]   = {
                .override       = ti12xx_override,
                .save_state     = ti_save_state,
                .restore_state  = ti_restore_state,
                .sock_init      = ti_init,
        },
        [CARDBUS_TYPE_TI1250]   = {
                .override       = ti1250_override,
                .save_state     = ti_save_state,
                .restore_state  = ti_restore_state,
                .sock_init      = ti_init,
        },
        [CARDBUS_TYPE_RICOH]    = {
                .override       = ricoh_override,
                .save_state     = ricoh_save_state,
                .restore_state  = ricoh_restore_state,
        },
        [CARDBUS_TYPE_TOPIC97]  = {
                .override       = topic97_override,
        },
        [CARDBUS_TYPE_O2MICRO]  = {
                .override       = o2micro_override,
                .restore_state  = o2micro_restore_state,
        },
};


/*
 * Only probe "regular" interrupts, don't
 * touch dangerous spots like the mouse irq,
 * because there are mice that apparently
 * get really confused if they get fondled
 * too intimately.
 *
 * Default to 11, 10, 9, 7, 6, 5, 4, 3.
 */
static u32 isa_interrupts = 0x0ef8;

static unsigned int yenta_probe_irq(struct yenta_socket *socket, u32 isa_irq_mask)
{
        int i;
        unsigned long val;
        u16 bridge_ctrl;
        u32 mask;

        /* Set up ISA irq routing to probe the ISA irqs.. */
        bridge_ctrl = config_readw(socket, CB_BRIDGE_CONTROL);
        if (!(bridge_ctrl & CB_BRIDGE_INTR)) {
                bridge_ctrl |= CB_BRIDGE_INTR;
                config_writew(socket, CB_BRIDGE_CONTROL, bridge_ctrl);
        }

        /*
         * Probe for usable interrupts using the force
         * register to generate bogus card status events.
         */
        cb_writel(socket, CB_SOCKET_EVENT, -1);
        cb_writel(socket, CB_SOCKET_MASK, CB_CSTSMASK);
        exca_writeb(socket, I365_CSCINT, 0);
        val = probe_irq_on() & isa_irq_mask;
        for (i = 1; i < 16; i++) {
                if (!((val >> i) & 1))
                        continue;
                exca_writeb(socket, I365_CSCINT, I365_CSC_STSCHG | (i << 4));
                cb_writel(socket, CB_SOCKET_FORCE, CB_FCARDSTS);
                udelay(100);
                cb_writel(socket, CB_SOCKET_EVENT, -1);
        }
        cb_writel(socket, CB_SOCKET_MASK, 0);
        exca_writeb(socket, I365_CSCINT, 0);

        mask = probe_irq_mask(val) & 0xffff;

        bridge_ctrl &= ~CB_BRIDGE_INTR;
        config_writew(socket, CB_BRIDGE_CONTROL, bridge_ctrl);

        return mask;
}


/* interrupt handler, only used during probing */
static irqreturn_t yenta_probe_handler(int irq, void *dev_id, struct pt_regs *regs)
{
        struct yenta_socket *socket = (struct yenta_socket *) dev_id;
        u8 csc;
        u32 cb_event;

        /* Clear interrupt status for the event */
        cb_event = cb_readl(socket, CB_SOCKET_EVENT);
        cb_writel(socket, CB_SOCKET_EVENT, -1);
        csc = exca_readb(socket, I365_CSC);

        if (cb_event || csc) {
                socket->probe_status = 1;
                return IRQ_HANDLED;
        }

        return IRQ_NONE;
}

/* probes the PCI interrupt, use only on override functions */
static int yenta_probe_cb_irq(struct yenta_socket *socket)
{
        u16 bridge_ctrl;

        if (!socket->cb_irq)
                return -1;

        socket->probe_status = 0;

        /* disable ISA interrupts */
        bridge_ctrl = config_readw(socket, CB_BRIDGE_CONTROL);
        bridge_ctrl &= ~CB_BRIDGE_INTR;
        config_writew(socket, CB_BRIDGE_CONTROL, bridge_ctrl);

        if (request_irq(socket->cb_irq, yenta_probe_handler, SA_SHIRQ, "yenta", socket)) {
                printk(KERN_WARNING "Yenta: request_irq() in yenta_probe_cb_irq() failed!\n");
                return -1;
        }

        /* generate interrupt, wait */
        exca_writeb(socket, I365_CSCINT, I365_CSC_STSCHG);
        cb_writel(socket, CB_SOCKET_EVENT, -1);
        cb_writel(socket, CB_SOCKET_MASK, CB_CSTSMASK);
        cb_writel(socket, CB_SOCKET_FORCE, CB_FCARDSTS);
        
        msleep(100);

        /* disable interrupts */
        cb_writel(socket, CB_SOCKET_MASK, 0);
        exca_writeb(socket, I365_CSCINT, 0);
        cb_writel(socket, CB_SOCKET_EVENT, -1);
        exca_readb(socket, I365_CSC);

        free_irq(socket->cb_irq, socket);

        return (int) socket->probe_status;
}



/*
 * Set static data that doesn't need re-initializing..
 */
static void yenta_get_socket_capabilities(struct yenta_socket *socket, u32 isa_irq_mask)
{
        socket->socket.features |= SS_CAP_PAGE_REGS | SS_CAP_PCCARD | SS_CAP_CARDBUS;
        socket->socket.map_size = 0x1000;
        socket->socket.pci_irq = socket->cb_irq;
        socket->socket.irq_mask = yenta_probe_irq(socket, isa_irq_mask);
        socket->socket.cb_dev = socket->dev;

        printk(KERN_INFO "Yenta: ISA IRQ mask 0x%04x, PCI irq %d\n",
               socket->socket.irq_mask, socket->cb_irq);
}

/*
 * Initialize the standard cardbus registers
 */
static void yenta_config_init(struct yenta_socket *socket)
{
        u16 bridge;
        struct pci_dev *dev = socket->dev;

        pci_set_power_state(socket->dev, 0);

        config_writel(socket, CB_LEGACY_MODE_BASE, 0);
        config_writel(socket, PCI_BASE_ADDRESS_0, dev->resource[0].start);
        config_writew(socket, PCI_COMMAND,
                        PCI_COMMAND_IO |
                        PCI_COMMAND_MEMORY |
                        PCI_COMMAND_MASTER |
                        PCI_COMMAND_WAIT);

        /* MAGIC NUMBERS! Fixme */
        config_writeb(socket, PCI_CACHE_LINE_SIZE, L1_CACHE_BYTES / 4);
        config_writeb(socket, PCI_LATENCY_TIMER, 168);
        config_writel(socket, PCI_PRIMARY_BUS,
                (176 << 24) |                      /* sec. latency timer */
                (dev->subordinate->subordinate << 16) | /* subordinate bus */
                (dev->subordinate->secondary << 8) |  /* secondary bus */
                dev->subordinate->primary);                /* primary bus */

        /*
         * Set up the bridging state:
         *  - enable write posting.
         *  - memory window 0 prefetchable, window 1 non-prefetchable
         *  - PCI interrupts enabled if a PCI interrupt exists..
         */
        bridge = config_readw(socket, CB_BRIDGE_CONTROL);
        bridge &= ~(CB_BRIDGE_CRST | CB_BRIDGE_PREFETCH1 | CB_BRIDGE_INTR | CB_BRIDGE_ISAEN | CB_BRIDGE_VGAEN);
        bridge |= CB_BRIDGE_PREFETCH0 | CB_BRIDGE_POSTEN | CB_BRIDGE_INTR;
        config_writew(socket, CB_BRIDGE_CONTROL, bridge);
}

/*
 * Initialize a cardbus controller. Make sure we have a usable
 * interrupt, and that we can map the cardbus area. Fill in the
 * socket information structure..
 */
static int __devinit yenta_probe (struct pci_dev *dev, const struct pci_device_id *id)
{
        struct yenta_socket *socket;
        int ret;
        
        socket = kmalloc(sizeof(struct yenta_socket), GFP_KERNEL);
        if (!socket)
                return -ENOMEM;
        memset(socket, 0, sizeof(*socket));

        /* prepare pcmcia_socket */
        socket->socket.ops = &yenta_socket_operations;
        socket->socket.resource_ops = &pccard_nonstatic_ops;
        socket->socket.dev.dev = &dev->dev;
        socket->socket.driver_data = socket;
        socket->socket.owner = THIS_MODULE;

        /* prepare struct yenta_socket */
        socket->dev = dev;
        pci_set_drvdata(dev, socket);

        /*
         * Do some basic sanity checking..
         */
        if (pci_enable_device(dev)) {
                ret = -EBUSY;
                goto free;
        }

        ret = pci_request_regions(dev, "yenta_socket");
        if (ret)
                goto disable;

        if (!pci_resource_start(dev, 0)) {
                printk(KERN_ERR "No cardbus resource!\n");
                ret = -ENODEV;
                goto release;
        }

        /*
         * Ok, start setup.. Map the cardbus registers,
         * and request the IRQ.
         */
        socket->base = ioremap(pci_resource_start(dev, 0), 0x1000);
        if (!socket->base) {
                ret = -ENOMEM;
                goto release;
        }

        /*
         * report the subsystem vendor and device for help debugging
         * the irq stuff...
         */
        printk(KERN_INFO "Yenta: CardBus bridge found at %s [%04x:%04x]\n",
                pci_name(dev), dev->subsystem_vendor, dev->subsystem_device);

        yenta_config_init(socket);

        /* Disable all events */
        cb_writel(socket, CB_SOCKET_MASK, 0x0);

        /* Set up the bridge regions.. */
        yenta_allocate_resources(socket);

        socket->cb_irq = dev->irq;

        /* Do we have special options for the device? */
        if (id->driver_data != CARDBUS_TYPE_DEFAULT &&
            id->driver_data < ARRAY_SIZE(cardbus_type)) {
                socket->type = &cardbus_type[id->driver_data];

                ret = socket->type->override(socket);
                if (ret < 0)
                        goto unmap;
        }

        /* We must finish initialization here */

        if (!socket->cb_irq || request_irq(socket->cb_irq, yenta_interrupt, SA_SHIRQ, "yenta", socket)) {
                /* No IRQ or request_irq failed. Poll */
                socket->cb_irq = 0; /* But zero is a valid IRQ number. */
                init_timer(&socket->poll_timer);
                socket->poll_timer.function = yenta_interrupt_wrapper;
                socket->poll_timer.data = (unsigned long)socket;
                socket->poll_timer.expires = jiffies + HZ;
                add_timer(&socket->poll_timer);
        }

        /* Figure out what the dang thing can do for the PCMCIA layer... */
        yenta_get_socket_capabilities(socket, isa_interrupts);
        printk(KERN_INFO "Socket status: %08x\n", cb_readl(socket, CB_SOCKET_STATE));

        /* Register it with the pcmcia layer.. */
        ret = pcmcia_register_socket(&socket->socket);
        if (ret == 0)
                goto out;

 unmap:
        iounmap(socket->base);
 release:
        pci_release_regions(dev);
 disable:
        pci_disable_device(dev);
 free:
        kfree(socket);
 out:
        return ret;
}


static int yenta_dev_suspend (struct pci_dev *dev, pm_message_t state)
{
        struct yenta_socket *socket = pci_get_drvdata(dev);
        int ret;

        ret = pcmcia_socket_dev_suspend(&dev->dev, state);

        if (socket) {
                if (socket->type && socket->type->save_state)
                        socket->type->save_state(socket);

                /* FIXME: pci_save_state needs to have a better interface */
                pci_save_state(dev);
                pci_read_config_dword(dev, 16*4, &socket->saved_state[0]);
                pci_read_config_dword(dev, 17*4, &socket->saved_state[1]);

                /*
                 * Some laptops (IBM T22) do not like us putting the Cardbus
                 * bridge into D3.  At a guess, some other laptop will
                 * probably require this, so leave it commented out for now.
                 */
                /* pci_set_power_state(dev, 3); */
        }

        return ret;
}


static int yenta_dev_resume (struct pci_dev *dev)
{
        struct yenta_socket *socket = pci_get_drvdata(dev);

        if (socket) {
                pci_set_power_state(dev, 0);
                /* FIXME: pci_restore_state needs to have a better interface */
                pci_restore_state(dev);
                pci_write_config_dword(dev, 16*4, socket->saved_state[0]);
                pci_write_config_dword(dev, 17*4, socket->saved_state[1]);

                if (socket->type && socket->type->restore_state)
                        socket->type->restore_state(socket);
        }

        return pcmcia_socket_dev_resume(&dev->dev);
}


#define CB_ID(vend,dev,type)                            \
        {                                               \
                .vendor         = vend,                 \
                .device         = dev,                  \
                .subvendor      = PCI_ANY_ID,           \
                .subdevice      = PCI_ANY_ID,           \
                .class          = PCI_CLASS_BRIDGE_CARDBUS << 8, \
                .class_mask     = ~0,                   \
                .driver_data    = CARDBUS_TYPE_##type,  \
        }

static struct pci_device_id yenta_table [] = {
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1031, TI),

        /*
         * TBD: Check if these TI variants can use more
         * advanced overrides instead.  (I can't get the
         * data sheets for these devices. --rmk)
         */
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1210, TI),

        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1130, TI113X),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1131, TI113X),

        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1211, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1220, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1221, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1225, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1251A, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1251B, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1420, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1450, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1451A, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1510, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1620, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4410, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4450, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4451, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4510, TI12XX),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4520, TI12XX),

        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1250, TI1250),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1410, TI1250),

        CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1211, TI12XX),
        CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1225, TI12XX),
        CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1410, TI1250),
        CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1420, TI12XX),

        CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C465, RICOH),
        CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C466, RICOH),
        CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C475, RICOH),
        CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C476, RICOH),
        CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C478, RICOH),

        CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC97, TOPIC97),
        CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC100, TOPIC97),

        CB_ID(PCI_VENDOR_ID_O2, PCI_ANY_ID, O2MICRO),

        /* match any cardbus bridge */
        CB_ID(PCI_ANY_ID, PCI_ANY_ID, DEFAULT),
        { /* all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, yenta_table);


static struct pci_driver yenta_cardbus_driver = {
        .name           = "yenta_cardbus",
        .id_table       = yenta_table,
        .probe          = yenta_probe,
        .remove         = __devexit_p(yenta_close),
        .suspend        = yenta_dev_suspend,
        .resume         = yenta_dev_resume,
};


static int __init yenta_socket_init(void)
{
        return pci_register_driver (&yenta_cardbus_driver);
}


static void __exit yenta_socket_exit (void)
{
        pci_unregister_driver (&yenta_cardbus_driver);
}


module_init(yenta_socket_init);
module_exit(yenta_socket_exit);

MODULE_LICENSE("GPL");