yenta_socket.c - Android社区 - https://www.androidos.net.cn/

Kernel | 2.6.39

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/*
 * 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/workqueue.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/slab.h>

#include <pcmcia/ss.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");

static int isa_probe = 1;
module_param(isa_probe, bool, 0444);
MODULE_PARM_DESC(isa_probe, "If set ISA interrupts are probed (default). Set to N to disable probing");

static int pwr_irqs_off;
module_param(pwr_irqs_off, bool, 0644);
MODULE_PARM_DESC(pwr_irqs_off, "Force IRQs off during power-on of slot. Use only when seeing IRQ storms!");

static char o2_speedup[] = "default";
module_param_string(o2_speedup, o2_speedup, sizeof(o2_speedup), 0444);
MODULE_PARM_DESC(o2_speedup, "Use prefetch/burst for O2-bridges: 'on', 'off' "
	"or 'default' (uses recommended behaviour for the detected bridge)");

/*
 * 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;

#define debug(x, s, args...) dev_dbg(&s->dev->dev, x, ##args)

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

/*
 * yenta PCI irq probing.
 * currently only used in the TI/EnE initialization code
 */
#ifdef CONFIG_YENTA_TI
static int yenta_probe_cb_irq(struct yenta_socket *socket);
static unsigned int yenta_probe_irq(struct yenta_socket *socket,
				u32 isa_irq_mask);
#endif

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("%04x %08x\n", socket, reg, val);
	return val;
}

static inline void cb_writel(struct yenta_socket *socket, unsigned reg, u32 val)
{
	debug("%04x %08x\n", socket, reg, val);
	writel(val, socket->base + reg);
	readl(socket->base + reg); /* avoid problems with PCI write posting */
}

static inline u8 config_readb(struct yenta_socket *socket, unsigned offset)
{
	u8 val;
	pci_read_config_byte(socket->dev, offset, &val);
	debug("%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("%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("%04x %08x\n", socket, offset, val);
	return val;
}

static inline void config_writeb(struct yenta_socket *socket, unsigned offset, u8 val)
{
	debug("%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("%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("%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("%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("%04x %04x\n", socket, reg, val);
	return val;
}

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

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

/* PCI write posting... */
	readb(socket->base + 0x800 + reg);
	readb(socket->base + 0x800 + reg + 1);
}

static ssize_t show_yenta_registers(struct device *yentadev, struct device_attribute *attr, char *buf)
{
	struct pci_dev *dev = to_pci_dev(yentadev);
	struct yenta_socket *socket = pci_get_drvdata(dev);
	int offset = 0, i;

offset = snprintf(buf, PAGE_SIZE, "CB registers:");
	for (i = 0; i < 0x24; i += 4) {
		unsigned val;
		if (!(i & 15))
			offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
		val = cb_readl(socket, i);
		offset += snprintf(buf + offset, PAGE_SIZE - offset, " %08x", val);
	}

offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:");
	for (i = 0; i < 0x45; i++) {
		unsigned char val;
		if (!(i & 7)) {
			if (i & 8) {
				memcpy(buf + offset, " -", 2);
				offset += 2;
			} else
				offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
		}
		val = exca_readb(socket, i);
		offset += snprintf(buf + offset, PAGE_SIZE - offset, " %02x", val);
	}
	buf[offset++] = '\n';
	return offset;
}

static DEVICE_ATTR(yenta_registers, S_IRUSR, show_yenta_registers, NULL);

/*
 * 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);

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 if (state & CB_16BITCARD) {
		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 void yenta_set_power(struct yenta_socket *socket, socket_state_t *state)
{
	/* some birdges require to use the ExCA registers to power 16bit cards */
	if (!(cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) &&
	    (socket->flags & YENTA_16BIT_POWER_EXCA)) {
		u8 reg, old;
		reg = old = exca_readb(socket, I365_POWER);
		reg &= ~(I365_VCC_MASK | I365_VPP1_MASK | I365_VPP2_MASK);

/* i82365SL-DF style */
		if (socket->flags & YENTA_16BIT_POWER_DF) {
			switch (state->Vcc) {
			case 33:
				reg |= I365_VCC_3V;
				break;
			case 50:
				reg |= I365_VCC_5V;
				break;
			default:
				reg = 0;
				break;
			}
			switch (state->Vpp) {
			case 33:
			case 50:
				reg |= I365_VPP1_5V;
				break;
			case 120:
				reg |= I365_VPP1_12V;
				break;
			}
		} else {
			/* i82365SL-B style */
			switch (state->Vcc) {
			case 50:
				reg |= I365_VCC_5V;
				break;
			default:
				reg = 0;
				break;
			}
			switch (state->Vpp) {
			case 50:
				reg |= I365_VPP1_5V | I365_VPP2_5V;
				break;
			case 120:
				reg |= I365_VPP1_12V | I365_VPP2_12V;
				break;
			}
		}

if (reg != old)
			exca_writeb(socket, I365_POWER, reg);
	} else {
		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;

/* if powering down: do it immediately */
	if (state->Vcc == 0)
		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->dev->irq) {
			intr |= socket->cb_irq ? socket->cb_irq : 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->dev->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 = exca_readb(socket, I365_CSCINT);
		reg &= I365_CSC_IRQ_MASK;
		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);

/* if powering up: do it as the last step when the socket is configured */
	if (state->Vcc != 0)
		yenta_set_power(socket, state);
	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, ®ion, 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 irqreturn_t yenta_interrupt(int irq, void *dev_id)
{
	unsigned int events;
	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, cb_event);

csc = exca_readb(socket, I365_CSC);

if (!(cb_event || csc))
		return IRQ_NONE;

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;
	}

if (events)
		pcmcia_parse_events(&socket->socket, events);

return IRQ_HANDLED;
}

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

yenta_interrupt(0, (void *)socket);
	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);
	}
}

/* redoes voltage interrogation if required */
static void yenta_interrogate(struct yenta_socket *socket)
{
	u32 state;

state = cb_readl(socket, CB_SOCKET_STATE);
	if (!(state & (CB_5VCARD | CB_3VCARD | CB_XVCARD | CB_YVCARD)) ||
	    (state & (CB_CDETECT1 | CB_CDETECT2 | CB_NOTACARD | CB_BADVCCREQ)) ||
	    ((state & (CB_16BITCARD | CB_CBCARD)) == (CB_16BITCARD | CB_CBCARD)))
		cb_writel(socket, CB_SOCKET_FORCE, CB_CVSTEST);
}

/* 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);

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

/* Redo card voltage interrogation */
	yenta_interrogate(socket);

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. We try very hard to not get below
 * the "ACC" values, though.
 */
#define BRIDGE_MEM_MAX (4*1024*1024)
#define BRIDGE_MEM_ACC (128*1024)
#define BRIDGE_MEM_MIN (16*1024)

#define BRIDGE_IO_MAX 512
#define BRIDGE_IO_ACC 256
#define BRIDGE_IO_MIN 32

#ifndef PCIBIOS_MIN_CARDBUS_IO
#define PCIBIOS_MIN_CARDBUS_IO PCIBIOS_MIN_IO
#endif

static int yenta_search_one_res(struct resource *root, struct resource *res,
				u32 min)
{
	u32 align, size, start, end;

if (res->flags & IORESOURCE_IO) {
		align = 1024;
		size = BRIDGE_IO_MAX;
		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 < min)
			size = min;
		align = size;
		start = PCIBIOS_MIN_MEM;
		end = ~0U;
	}

do {
		if (allocate_resource(root, res, size, start, end, align,
				      NULL, NULL) == 0) {
			return 1;
		}
		size = size/2;
		align = size;
	} while (size >= min);

return 0;
}

static int yenta_search_res(struct yenta_socket *socket, struct resource *res,
			    u32 min)
{
	struct resource *root;
	int i;

pci_bus_for_each_resource(socket->dev->bus, root, i) {
		if (!root)
			continue;

if ((res->flags ^ root->flags) &
		    (IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH))
			continue; /* Wrong type */

if (yenta_search_one_res(root, res, min))
			return 1;
	}
	return 0;
}

static int yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned type, int addr_start, int addr_end)
{
	struct pci_dev *dev = socket->dev;
	struct resource *res;
	struct pci_bus_region region;
	unsigned mask;

res = dev->resource + PCI_BRIDGE_RESOURCES + nr;
	/* Already allocated? */
	if (res->parent)
		return 0;

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

res->name = dev->subordinate->name;
	res->flags = type;

region.start = config_readl(socket, addr_start) & mask;
	region.end = config_readl(socket, addr_end) | ~mask;
	if (region.start && region.end > region.start && !override_bios) {
		pcibios_bus_to_resource(dev, res, ®ion);
		if (pci_claim_resource(dev, PCI_BRIDGE_RESOURCES + nr) == 0)
			return 0;
		dev_printk(KERN_INFO, &dev->dev,
			   "Preassigned resource %d busy or not available, "
			   "reconfiguring...\n",
			   nr);
	}

if (type & IORESOURCE_IO) {
		if ((yenta_search_res(socket, res, BRIDGE_IO_MAX)) ||
		    (yenta_search_res(socket, res, BRIDGE_IO_ACC)) ||
		    (yenta_search_res(socket, res, BRIDGE_IO_MIN)))
			return 1;
	} else {
		if (type & IORESOURCE_PREFETCH) {
			if ((yenta_search_res(socket, res, BRIDGE_MEM_MAX)) ||
			    (yenta_search_res(socket, res, BRIDGE_MEM_ACC)) ||
			    (yenta_search_res(socket, res, BRIDGE_MEM_MIN)))
				return 1;
			/* Approximating prefetchable by non-prefetchable */
			res->flags = IORESOURCE_MEM;
		}
		if ((yenta_search_res(socket, res, BRIDGE_MEM_MAX)) ||
		    (yenta_search_res(socket, res, BRIDGE_MEM_ACC)) ||
		    (yenta_search_res(socket, res, BRIDGE_MEM_MIN)))
			return 1;
	}

dev_printk(KERN_INFO, &dev->dev,
		   "no resource of type %x available, trying to continue...\n",
		   type);
	res->start = res->end = res->flags = 0;
	return 0;
}

/*
 * Allocate the bridge mappings for the device..
 */
static void yenta_allocate_resources(struct yenta_socket *socket)
{
	int program = 0;
	program += yenta_allocate_res(socket, 0, IORESOURCE_IO,
			   PCI_CB_IO_BASE_0, PCI_CB_IO_LIMIT_0);
	program += yenta_allocate_res(socket, 1, IORESOURCE_IO,
			   PCI_CB_IO_BASE_1, PCI_CB_IO_LIMIT_1);
	program += yenta_allocate_res(socket, 2, IORESOURCE_MEM|IORESOURCE_PREFETCH,
			   PCI_CB_MEMORY_BASE_0, PCI_CB_MEMORY_LIMIT_0);
	program += yenta_allocate_res(socket, 3, IORESOURCE_MEM,
			   PCI_CB_MEMORY_BASE_1, PCI_CB_MEMORY_LIMIT_1);
	if (program)
		pci_setup_cardbus(socket->dev->subordinate);
}

/*
 * 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 = res->flags = 0;
	}
}

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

/* Remove the register attributes */
	device_remove_file(&dev->dev, &dev_attr_yenta_registers);

/* 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,
	.set_socket		= yenta_set_socket,
	.set_io_map		= yenta_set_io_map,
	.set_mem_map		= yenta_set_mem_map,
};

#ifdef CONFIG_YENTA_TI
#include "ti113x.h"
#endif
#ifdef CONFIG_YENTA_RICOH
#include "ricoh.h"
#endif
#ifdef CONFIG_YENTA_TOSHIBA
#include "topic.h"
#endif
#ifdef CONFIG_YENTA_O2
#include "o2micro.h"
#endif

enum {
	CARDBUS_TYPE_DEFAULT = -1,
	CARDBUS_TYPE_TI,
	CARDBUS_TYPE_TI113X,
	CARDBUS_TYPE_TI12XX,
	CARDBUS_TYPE_TI1250,
	CARDBUS_TYPE_RICOH,
	CARDBUS_TYPE_TOPIC95,
	CARDBUS_TYPE_TOPIC97,
	CARDBUS_TYPE_O2MICRO,
	CARDBUS_TYPE_ENE,
};

/*
 * Different cardbus controllers have slightly different
 * initialization sequences etc details. List them here..
 */
static struct cardbus_type cardbus_type[] = {
#ifdef CONFIG_YENTA_TI
	[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_ENE]	= {
		.override	= ene_override,
		.save_state	= ti_save_state,
		.restore_state	= ti_restore_state,
		.sock_init	= ti_init,
	},
#endif
#ifdef CONFIG_YENTA_RICOH
	[CARDBUS_TYPE_RICOH]	= {
		.override	= ricoh_override,
		.save_state	= ricoh_save_state,
		.restore_state	= ricoh_restore_state,
	},
#endif
#ifdef CONFIG_YENTA_TOSHIBA
	[CARDBUS_TYPE_TOPIC95]	= {
		.override	= topic95_override,
	},
	[CARDBUS_TYPE_TOPIC97]	= {
		.override	= topic97_override,
	},
#endif
#ifdef CONFIG_YENTA_O2
	[CARDBUS_TYPE_O2MICRO]	= {
		.override	= o2micro_override,
		.restore_state	= o2micro_restore_state,
	},
#endif
};

static unsigned int yenta_probe_irq(struct yenta_socket *socket, u32 isa_irq_mask)
{
	int i;
	unsigned long val;
	u32 mask;
	u8 reg;

/*
	 * 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);
	reg = exca_readb(socket, I365_CSCINT);
	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, reg);

mask = probe_irq_mask(val) & 0xffff;

return mask;
}

/*
 * yenta PCI irq probing.
 * currently only used in the TI/EnE initialization code
 */
#ifdef CONFIG_YENTA_TI

/* interrupt handler, only used during probing */
static irqreturn_t yenta_probe_handler(int irq, void *dev_id)
{
	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)
{
	u8 reg = 0;

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

socket->probe_status = 0;

if (request_irq(socket->cb_irq, yenta_probe_handler, IRQF_SHARED, "yenta", socket)) {
		dev_printk(KERN_WARNING, &socket->dev->dev,
			   "request_irq() in yenta_probe_cb_irq() failed!\n");
		return -1;
	}

/* generate interrupt, wait */
	if (!socket->dev->irq)
		reg = exca_readb(socket, I365_CSCINT);
	exca_writeb(socket, I365_CSCINT, reg | 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, reg);
	cb_writel(socket, CB_SOCKET_EVENT, -1);
	exca_readb(socket, I365_CSC);

free_irq(socket->cb_irq, socket);

return (int) socket->probe_status;
}

#endif /* CONFIG_YENTA_TI */

/*
 * 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.pci_irq = socket->cb_irq;
	if (isa_probe)
		socket->socket.irq_mask = yenta_probe_irq(socket, isa_irq_mask);
	else
		socket->socket.irq_mask = 0;

dev_printk(KERN_INFO, &socket->dev->dev,
		   "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;
	struct pci_bus_region region;

pcibios_resource_to_bus(socket->dev, ®ion, &dev->resource[0]);

config_writel(socket, CB_LEGACY_MODE_BASE, 0);
	config_writel(socket, PCI_BASE_ADDRESS_0, region.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_ISAEN | CB_BRIDGE_VGAEN);
	bridge |= CB_BRIDGE_PREFETCH0 | CB_BRIDGE_POSTEN;
	config_writew(socket, CB_BRIDGE_CONTROL, bridge);
}

/**
 * yenta_fixup_parent_bridge - Fix subordinate bus# of the parent bridge
 * @cardbus_bridge: The PCI bus which the CardBus bridge bridges to
 *
 * Checks if devices on the bus which the CardBus bridge bridges to would be
 * invisible during PCI scans because of a misconfigured subordinate number
 * of the parent brige - some BIOSes seem to be too lazy to set it right.
 * Does the fixup carefully by checking how far it can go without conflicts.
 * See http://bugzilla.kernel.org/show_bug.cgi?id=2944 for more information.
 */
static void yenta_fixup_parent_bridge(struct pci_bus *cardbus_bridge)
{
	struct list_head *tmp;
	unsigned char upper_limit;
	/*
	 * We only check and fix the parent bridge: All systems which need
	 * this fixup that have been reviewed are laptops and the only bridge
	 * which needed fixing was the parent bridge of the CardBus bridge:
	 */
	struct pci_bus *bridge_to_fix = cardbus_bridge->parent;

/* Check bus numbers are already set up correctly: */
	if (bridge_to_fix->subordinate >= cardbus_bridge->subordinate)
		return; /* The subordinate number is ok, nothing to do */

if (!bridge_to_fix->parent)
		return; /* Root bridges are ok */

/* stay within the limits of the bus range of the parent: */
	upper_limit = bridge_to_fix->parent->subordinate;

/* check the bus ranges of all silbling bridges to prevent overlap */
	list_for_each(tmp, &bridge_to_fix->parent->children) {
		struct pci_bus *silbling = pci_bus_b(tmp);
		/*
		 * If the silbling has a higher secondary bus number
		 * and it's secondary is equal or smaller than our
		 * current upper limit, set the new upper limit to
		 * the bus number below the silbling's range:
		 */
		if (silbling->secondary > bridge_to_fix->subordinate
		    && silbling->secondary <= upper_limit)
			upper_limit = silbling->secondary - 1;
	}

/* Show that the wanted subordinate number is not possible: */
	if (cardbus_bridge->subordinate > upper_limit)
		dev_printk(KERN_WARNING, &cardbus_bridge->dev,
			   "Upper limit for fixing this "
			   "bridge's parent bridge: #%02x\n", upper_limit);

/* If we have room to increase the bridge's subordinate number, */
	if (bridge_to_fix->subordinate < upper_limit) {

/* use the highest number of the hidden bus, within limits */
		unsigned char subordinate_to_assign =
			min(cardbus_bridge->subordinate, upper_limit);

dev_printk(KERN_INFO, &bridge_to_fix->dev,
			   "Raising subordinate bus# of parent "
			   "bus (#%02x) from #%02x to #%02x\n",
			   bridge_to_fix->number,
			   bridge_to_fix->subordinate, subordinate_to_assign);

/* Save the new subordinate in the bus struct of the bridge */
		bridge_to_fix->subordinate = subordinate_to_assign;

/* and update the PCI config space with the new subordinate */
		pci_write_config_byte(bridge_to_fix->self,
			PCI_SUBORDINATE_BUS, bridge_to_fix->subordinate);
	}
}

/*
 * 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;

/*
	 * If we failed to assign proper bus numbers for this cardbus
	 * controller during PCI probe, its subordinate pci_bus is NULL.
	 * Bail out if so.
	 */
	if (!dev->subordinate) {
		dev_printk(KERN_ERR, &dev->dev, "no bus associated! "
			   "(try 'pci=assign-busses')\n");
		return -ENODEV;
	}

socket = kzalloc(sizeof(struct yenta_socket), GFP_KERNEL);
	if (!socket)
		return -ENOMEM;

/* prepare pcmcia_socket */
	socket->socket.ops = ¥ta_socket_operations;
	socket->socket.resource_ops = &pccard_nonstatic_ops;
	socket->socket.dev.parent = &dev->dev;
	socket->socket.driver_data = socket;
	socket->socket.owner = THIS_MODULE;
	socket->socket.features = SS_CAP_PAGE_REGS | SS_CAP_PCCARD;
	socket->socket.map_size = 0x1000;
	socket->socket.cb_dev = dev;

/* 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)) {
		dev_printk(KERN_ERR, &dev->dev, "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...
	 */
	dev_printk(KERN_INFO, &dev->dev, "CardBus bridge found [%04x:%04x]\n",
		   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, IRQF_SHARED, "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);
		dev_printk(KERN_INFO, &dev->dev,
			   "no PCI IRQ, CardBus support disabled for this "
			   "socket.\n");
		dev_printk(KERN_INFO, &dev->dev,
			   "check your BIOS CardBus, BIOS IRQ or ACPI "
			   "settings.\n");
	} else {
		socket->socket.features |= SS_CAP_CARDBUS;
	}

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

yenta_fixup_parent_bridge(dev->subordinate);

/* Register it with the pcmcia layer.. */
	ret = pcmcia_register_socket(&socket->socket);
	if (ret == 0) {
		/* Add the yenta register attributes */
		ret = device_create_file(&dev->dev, &dev_attr_yenta_registers);
		if (ret == 0)
			goto out;

/* error path... */
		pcmcia_unregister_socket(&socket->socket);
	}

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

#ifdef CONFIG_PM
static int yenta_dev_suspend_noirq(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct yenta_socket *socket = pci_get_drvdata(pdev);

if (!socket)
		return 0;

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

pci_save_state(pdev);
	pci_read_config_dword(pdev, 16*4, &socket->saved_state[0]);
	pci_read_config_dword(pdev, 17*4, &socket->saved_state[1]);
	pci_disable_device(pdev);

return 0;
}

static int yenta_dev_resume_noirq(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct yenta_socket *socket = pci_get_drvdata(pdev);
	int ret;

if (!socket)
		return 0;

pci_write_config_dword(pdev, 16*4, socket->saved_state[0]);
	pci_write_config_dword(pdev, 17*4, socket->saved_state[1]);

ret = pci_enable_device(pdev);
	if (ret)
		return ret;

pci_set_master(pdev);

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

return 0;
}

static const struct dev_pm_ops yenta_pm_ops = {
	.suspend_noirq = yenta_dev_suspend_noirq,
	.resume_noirq = yenta_dev_resume_noirq,
	.freeze_noirq = yenta_dev_suspend_noirq,
	.thaw_noirq = yenta_dev_resume_noirq,
	.poweroff_noirq = yenta_dev_suspend_noirq,
	.restore_noirq = yenta_dev_resume_noirq,
};

#define YENTA_PM_OPS	(¥ta_pm_ops)
#else
#define YENTA_PM_OPS	NULL
#endif

#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)
	 */
#ifdef CONFIG_YENTA_TI
	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_TI, PCI_DEVICE_ID_TI_XX21_XX11, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_X515, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_X420, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_X620, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_7410, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_7510, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_7610, TI12XX),

CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_710, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_712, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_720, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_722, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1211, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1225, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1410, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1420, ENE),
#endif /* CONFIG_YENTA_TI */

#ifdef CONFIG_YENTA_RICOH
	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),
#endif

#ifdef CONFIG_YENTA_TOSHIBA
	CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC95, TOPIC95),
	CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC97, TOPIC97),
	CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC100, TOPIC97),
#endif

#ifdef CONFIG_YENTA_O2
	CB_ID(PCI_VENDOR_ID_O2, PCI_ANY_ID, O2MICRO),
#endif

/* 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),
	.driver.pm	= YENTA_PM_OPS,
};

static int __init yenta_socket_init(void)
{
	return pci_register_driver(¥ta_cardbus_driver);
}

static void __exit yenta_socket_exit(void)
{
	pci_unregister_driver(¥ta_cardbus_driver);
}

module_init(yenta_socket_init);
module_exit(yenta_socket_exit);

MODULE_LICENSE("GPL");

C++程序 | 1459行 | 39.39 KB

/*
 * 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/workqueue.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/slab.h>

#include <pcmcia/ss.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");

static int isa_probe = 1;
module_param(isa_probe, bool, 0444);
MODULE_PARM_DESC(isa_probe, "If set ISA interrupts are probed (default). Set to N to disable probing");

static int pwr_irqs_off;
module_param(pwr_irqs_off, bool, 0644);
MODULE_PARM_DESC(pwr_irqs_off, "Force IRQs off during power-on of slot. Use only when seeing IRQ storms!");

static char o2_speedup[] = "default";
module_param_string(o2_speedup, o2_speedup, sizeof(o2_speedup), 0444);
MODULE_PARM_DESC(o2_speedup, "Use prefetch/burst for O2-bridges: 'on', 'off' "
	"or 'default' (uses recommended behaviour for the detected bridge)");

/*
 * 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;


#define debug(x, s, args...) dev_dbg(&s->dev->dev, x, ##args)

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

/*
 * yenta PCI irq probing.
 * currently only used in the TI/EnE initialization code
 */
#ifdef CONFIG_YENTA_TI
static int yenta_probe_cb_irq(struct yenta_socket *socket);
static unsigned int yenta_probe_irq(struct yenta_socket *socket,
				u32 isa_irq_mask);
#endif


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("%04x %08x\n", socket, reg, val);
	return val;
}

static inline void cb_writel(struct yenta_socket *socket, unsigned reg, u32 val)
{
	debug("%04x %08x\n", socket, reg, val);
	writel(val, socket->base + reg);
	readl(socket->base + reg); /* avoid problems with PCI write posting */
}

static inline u8 config_readb(struct yenta_socket *socket, unsigned offset)
{
	u8 val;
	pci_read_config_byte(socket->dev, offset, &val);
	debug("%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("%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("%04x %08x\n", socket, offset, val);
	return val;
}

static inline void config_writeb(struct yenta_socket *socket, unsigned offset, u8 val)
{
	debug("%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("%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("%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("%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("%04x %04x\n", socket, reg, val);
	return val;
}

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

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

	/* PCI write posting... */
	readb(socket->base + 0x800 + reg);
	readb(socket->base + 0x800 + reg + 1);
}

static ssize_t show_yenta_registers(struct device *yentadev, struct device_attribute *attr, char *buf)
{
	struct pci_dev *dev = to_pci_dev(yentadev);
	struct yenta_socket *socket = pci_get_drvdata(dev);
	int offset = 0, i;

	offset = snprintf(buf, PAGE_SIZE, "CB registers:");
	for (i = 0; i < 0x24; i += 4) {
		unsigned val;
		if (!(i & 15))
			offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
		val = cb_readl(socket, i);
		offset += snprintf(buf + offset, PAGE_SIZE - offset, " %08x", val);
	}

	offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:");
	for (i = 0; i < 0x45; i++) {
		unsigned char val;
		if (!(i & 7)) {
			if (i & 8) {
				memcpy(buf + offset, " -", 2);
				offset += 2;
			} else
				offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
		}
		val = exca_readb(socket, i);
		offset += snprintf(buf + offset, PAGE_SIZE - offset, " %02x", val);
	}
	buf[offset++] = '\n';
	return offset;
}

static DEVICE_ATTR(yenta_registers, S_IRUSR, show_yenta_registers, NULL);

/*
 * 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_5VCARD | CB_3VCARD | CB_XVCARD | CB_YVCARD)) ? 0 : SS_PENDING;
	val |= (state & (CB_CDETECT1 | CB_CDETECT2)) ? SS_PENDING : 0;


	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 if (state & CB_16BITCARD) {
		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 void yenta_set_power(struct yenta_socket *socket, socket_state_t *state)
{
	/* some birdges require to use the ExCA registers to power 16bit cards */
	if (!(cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) &&
	    (socket->flags & YENTA_16BIT_POWER_EXCA)) {
		u8 reg, old;
		reg = old = exca_readb(socket, I365_POWER);
		reg &= ~(I365_VCC_MASK | I365_VPP1_MASK | I365_VPP2_MASK);

		/* i82365SL-DF style */
		if (socket->flags & YENTA_16BIT_POWER_DF) {
			switch (state->Vcc) {
			case 33:
				reg |= I365_VCC_3V;
				break;
			case 50:
				reg |= I365_VCC_5V;
				break;
			default:
				reg = 0;
				break;
			}
			switch (state->Vpp) {
			case 33:
			case 50:
				reg |= I365_VPP1_5V;
				break;
			case 120:
				reg |= I365_VPP1_12V;
				break;
			}
		} else {
			/* i82365SL-B style */
			switch (state->Vcc) {
			case 50:
				reg |= I365_VCC_5V;
				break;
			default:
				reg = 0;
				break;
			}
			switch (state->Vpp) {
			case 50:
				reg |= I365_VPP1_5V | I365_VPP2_5V;
				break;
			case 120:
				reg |= I365_VPP1_12V | I365_VPP2_12V;
				break;
			}
		}

		if (reg != old)
			exca_writeb(socket, I365_POWER, reg);
	} else {
		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;

	/* if powering down: do it immediately */
	if (state->Vcc == 0)
		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->dev->irq) {
			intr |= socket->cb_irq ? socket->cb_irq : 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->dev->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 = exca_readb(socket, I365_CSCINT);
		reg &= I365_CSC_IRQ_MASK;
		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);

	/* if powering up: do it as the last step when the socket is configured */
	if (state->Vcc != 0)
		yenta_set_power(socket, state);
	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 irqreturn_t yenta_interrupt(int irq, void *dev_id)
{
	unsigned int events;
	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, cb_event);

	csc = exca_readb(socket, I365_CSC);

	if (!(cb_event || csc))
		return IRQ_NONE;

	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;
	}

	if (events)
		pcmcia_parse_events(&socket->socket, events);

	return IRQ_HANDLED;
}

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

	yenta_interrupt(0, (void *)socket);
	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);
	}
}

/* redoes voltage interrogation if required */
static void yenta_interrogate(struct yenta_socket *socket)
{
	u32 state;

	state = cb_readl(socket, CB_SOCKET_STATE);
	if (!(state & (CB_5VCARD | CB_3VCARD | CB_XVCARD | CB_YVCARD)) ||
	    (state & (CB_CDETECT1 | CB_CDETECT2 | CB_NOTACARD | CB_BADVCCREQ)) ||
	    ((state & (CB_16BITCARD | CB_CBCARD)) == (CB_16BITCARD | CB_CBCARD)))
		cb_writel(socket, CB_SOCKET_FORCE, CB_CVSTEST);
}

/* 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);

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

	/* Redo card voltage interrogation */
	yenta_interrogate(socket);

	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. We try very hard to not get below
 * the "ACC" values, though.
 */
#define BRIDGE_MEM_MAX (4*1024*1024)
#define BRIDGE_MEM_ACC (128*1024)
#define BRIDGE_MEM_MIN (16*1024)

#define BRIDGE_IO_MAX 512
#define BRIDGE_IO_ACC 256
#define BRIDGE_IO_MIN 32

#ifndef PCIBIOS_MIN_CARDBUS_IO
#define PCIBIOS_MIN_CARDBUS_IO PCIBIOS_MIN_IO
#endif

static int yenta_search_one_res(struct resource *root, struct resource *res,
				u32 min)
{
	u32 align, size, start, end;

	if (res->flags & IORESOURCE_IO) {
		align = 1024;
		size = BRIDGE_IO_MAX;
		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 < min)
			size = min;
		align = size;
		start = PCIBIOS_MIN_MEM;
		end = ~0U;
	}

	do {
		if (allocate_resource(root, res, size, start, end, align,
				      NULL, NULL) == 0) {
			return 1;
		}
		size = size/2;
		align = size;
	} while (size >= min);

	return 0;
}


static int yenta_search_res(struct yenta_socket *socket, struct resource *res,
			    u32 min)
{
	struct resource *root;
	int i;

	pci_bus_for_each_resource(socket->dev->bus, root, i) {
		if (!root)
			continue;

		if ((res->flags ^ root->flags) &
		    (IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH))
			continue; /* Wrong type */

		if (yenta_search_one_res(root, res, min))
			return 1;
	}
	return 0;
}

static int yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned type, int addr_start, int addr_end)
{
	struct pci_dev *dev = socket->dev;
	struct resource *res;
	struct pci_bus_region region;
	unsigned mask;

	res = dev->resource + PCI_BRIDGE_RESOURCES + nr;
	/* Already allocated? */
	if (res->parent)
		return 0;

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

	res->name = dev->subordinate->name;
	res->flags = type;

	region.start = config_readl(socket, addr_start) & mask;
	region.end = config_readl(socket, addr_end) | ~mask;
	if (region.start && region.end > region.start && !override_bios) {
		pcibios_bus_to_resource(dev, res, &region);
		if (pci_claim_resource(dev, PCI_BRIDGE_RESOURCES + nr) == 0)
			return 0;
		dev_printk(KERN_INFO, &dev->dev,
			   "Preassigned resource %d busy or not available, "
			   "reconfiguring...\n",
			   nr);
	}

	if (type & IORESOURCE_IO) {
		if ((yenta_search_res(socket, res, BRIDGE_IO_MAX)) ||
		    (yenta_search_res(socket, res, BRIDGE_IO_ACC)) ||
		    (yenta_search_res(socket, res, BRIDGE_IO_MIN)))
			return 1;
	} else {
		if (type & IORESOURCE_PREFETCH) {
			if ((yenta_search_res(socket, res, BRIDGE_MEM_MAX)) ||
			    (yenta_search_res(socket, res, BRIDGE_MEM_ACC)) ||
			    (yenta_search_res(socket, res, BRIDGE_MEM_MIN)))
				return 1;
			/* Approximating prefetchable by non-prefetchable */
			res->flags = IORESOURCE_MEM;
		}
		if ((yenta_search_res(socket, res, BRIDGE_MEM_MAX)) ||
		    (yenta_search_res(socket, res, BRIDGE_MEM_ACC)) ||
		    (yenta_search_res(socket, res, BRIDGE_MEM_MIN)))
			return 1;
	}

	dev_printk(KERN_INFO, &dev->dev,
		   "no resource of type %x available, trying to continue...\n",
		   type);
	res->start = res->end = res->flags = 0;
	return 0;
}

/*
 * Allocate the bridge mappings for the device..
 */
static void yenta_allocate_resources(struct yenta_socket *socket)
{
	int program = 0;
	program += yenta_allocate_res(socket, 0, IORESOURCE_IO,
			   PCI_CB_IO_BASE_0, PCI_CB_IO_LIMIT_0);
	program += yenta_allocate_res(socket, 1, IORESOURCE_IO,
			   PCI_CB_IO_BASE_1, PCI_CB_IO_LIMIT_1);
	program += yenta_allocate_res(socket, 2, IORESOURCE_MEM|IORESOURCE_PREFETCH,
			   PCI_CB_MEMORY_BASE_0, PCI_CB_MEMORY_LIMIT_0);
	program += yenta_allocate_res(socket, 3, IORESOURCE_MEM,
			   PCI_CB_MEMORY_BASE_1, PCI_CB_MEMORY_LIMIT_1);
	if (program)
		pci_setup_cardbus(socket->dev->subordinate);
}


/*
 * 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 = res->flags = 0;
	}
}


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

	/* Remove the register attributes */
	device_remove_file(&dev->dev, &dev_attr_yenta_registers);

	/* 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,
	.set_socket		= yenta_set_socket,
	.set_io_map		= yenta_set_io_map,
	.set_mem_map		= yenta_set_mem_map,
};


#ifdef CONFIG_YENTA_TI
#include "ti113x.h"
#endif
#ifdef CONFIG_YENTA_RICOH
#include "ricoh.h"
#endif
#ifdef CONFIG_YENTA_TOSHIBA
#include "topic.h"
#endif
#ifdef CONFIG_YENTA_O2
#include "o2micro.h"
#endif

enum {
	CARDBUS_TYPE_DEFAULT = -1,
	CARDBUS_TYPE_TI,
	CARDBUS_TYPE_TI113X,
	CARDBUS_TYPE_TI12XX,
	CARDBUS_TYPE_TI1250,
	CARDBUS_TYPE_RICOH,
	CARDBUS_TYPE_TOPIC95,
	CARDBUS_TYPE_TOPIC97,
	CARDBUS_TYPE_O2MICRO,
	CARDBUS_TYPE_ENE,
};

/*
 * Different cardbus controllers have slightly different
 * initialization sequences etc details. List them here..
 */
static struct cardbus_type cardbus_type[] = {
#ifdef CONFIG_YENTA_TI
	[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_ENE]	= {
		.override	= ene_override,
		.save_state	= ti_save_state,
		.restore_state	= ti_restore_state,
		.sock_init	= ti_init,
	},
#endif
#ifdef CONFIG_YENTA_RICOH
	[CARDBUS_TYPE_RICOH]	= {
		.override	= ricoh_override,
		.save_state	= ricoh_save_state,
		.restore_state	= ricoh_restore_state,
	},
#endif
#ifdef CONFIG_YENTA_TOSHIBA
	[CARDBUS_TYPE_TOPIC95]	= {
		.override	= topic95_override,
	},
	[CARDBUS_TYPE_TOPIC97]	= {
		.override	= topic97_override,
	},
#endif
#ifdef CONFIG_YENTA_O2
	[CARDBUS_TYPE_O2MICRO]	= {
		.override	= o2micro_override,
		.restore_state	= o2micro_restore_state,
	},
#endif
};


static unsigned int yenta_probe_irq(struct yenta_socket *socket, u32 isa_irq_mask)
{
	int i;
	unsigned long val;
	u32 mask;
	u8 reg;

	/*
	 * 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);
	reg = exca_readb(socket, I365_CSCINT);
	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, reg);

	mask = probe_irq_mask(val) & 0xffff;

	return mask;
}


/*
 * yenta PCI irq probing.
 * currently only used in the TI/EnE initialization code
 */
#ifdef CONFIG_YENTA_TI

/* interrupt handler, only used during probing */
static irqreturn_t yenta_probe_handler(int irq, void *dev_id)
{
	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)
{
	u8 reg = 0;

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

	socket->probe_status = 0;

	if (request_irq(socket->cb_irq, yenta_probe_handler, IRQF_SHARED, "yenta", socket)) {
		dev_printk(KERN_WARNING, &socket->dev->dev,
			   "request_irq() in yenta_probe_cb_irq() failed!\n");
		return -1;
	}

	/* generate interrupt, wait */
	if (!socket->dev->irq)
		reg = exca_readb(socket, I365_CSCINT);
	exca_writeb(socket, I365_CSCINT, reg | 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, reg);
	cb_writel(socket, CB_SOCKET_EVENT, -1);
	exca_readb(socket, I365_CSC);

	free_irq(socket->cb_irq, socket);

	return (int) socket->probe_status;
}

#endif /* CONFIG_YENTA_TI */


/*
 * 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.pci_irq = socket->cb_irq;
	if (isa_probe)
		socket->socket.irq_mask = yenta_probe_irq(socket, isa_irq_mask);
	else
		socket->socket.irq_mask = 0;

	dev_printk(KERN_INFO, &socket->dev->dev,
		   "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;
	struct pci_bus_region region;

	pcibios_resource_to_bus(socket->dev, &region, &dev->resource[0]);

	config_writel(socket, CB_LEGACY_MODE_BASE, 0);
	config_writel(socket, PCI_BASE_ADDRESS_0, region.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_ISAEN | CB_BRIDGE_VGAEN);
	bridge |= CB_BRIDGE_PREFETCH0 | CB_BRIDGE_POSTEN;
	config_writew(socket, CB_BRIDGE_CONTROL, bridge);
}

/**
 * yenta_fixup_parent_bridge - Fix subordinate bus# of the parent bridge
 * @cardbus_bridge: The PCI bus which the CardBus bridge bridges to
 *
 * Checks if devices on the bus which the CardBus bridge bridges to would be
 * invisible during PCI scans because of a misconfigured subordinate number
 * of the parent brige - some BIOSes seem to be too lazy to set it right.
 * Does the fixup carefully by checking how far it can go without conflicts.
 * See http://bugzilla.kernel.org/show_bug.cgi?id=2944 for more information.
 */
static void yenta_fixup_parent_bridge(struct pci_bus *cardbus_bridge)
{
	struct list_head *tmp;
	unsigned char upper_limit;
	/*
	 * We only check and fix the parent bridge: All systems which need
	 * this fixup that have been reviewed are laptops and the only bridge
	 * which needed fixing was the parent bridge of the CardBus bridge:
	 */
	struct pci_bus *bridge_to_fix = cardbus_bridge->parent;

	/* Check bus numbers are already set up correctly: */
	if (bridge_to_fix->subordinate >= cardbus_bridge->subordinate)
		return; /* The subordinate number is ok, nothing to do */

	if (!bridge_to_fix->parent)
		return; /* Root bridges are ok */

	/* stay within the limits of the bus range of the parent: */
	upper_limit = bridge_to_fix->parent->subordinate;

	/* check the bus ranges of all silbling bridges to prevent overlap */
	list_for_each(tmp, &bridge_to_fix->parent->children) {
		struct pci_bus *silbling = pci_bus_b(tmp);
		/*
		 * If the silbling has a higher secondary bus number
		 * and it's secondary is equal or smaller than our
		 * current upper limit, set the new upper limit to
		 * the bus number below the silbling's range:
		 */
		if (silbling->secondary > bridge_to_fix->subordinate
		    && silbling->secondary <= upper_limit)
			upper_limit = silbling->secondary - 1;
	}

	/* Show that the wanted subordinate number is not possible: */
	if (cardbus_bridge->subordinate > upper_limit)
		dev_printk(KERN_WARNING, &cardbus_bridge->dev,
			   "Upper limit for fixing this "
			   "bridge's parent bridge: #%02x\n", upper_limit);

	/* If we have room to increase the bridge's subordinate number, */
	if (bridge_to_fix->subordinate < upper_limit) {

		/* use the highest number of the hidden bus, within limits */
		unsigned char subordinate_to_assign =
			min(cardbus_bridge->subordinate, upper_limit);

		dev_printk(KERN_INFO, &bridge_to_fix->dev,
			   "Raising subordinate bus# of parent "
			   "bus (#%02x) from #%02x to #%02x\n",
			   bridge_to_fix->number,
			   bridge_to_fix->subordinate, subordinate_to_assign);

		/* Save the new subordinate in the bus struct of the bridge */
		bridge_to_fix->subordinate = subordinate_to_assign;

		/* and update the PCI config space with the new subordinate */
		pci_write_config_byte(bridge_to_fix->self,
			PCI_SUBORDINATE_BUS, bridge_to_fix->subordinate);
	}
}

/*
 * 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;

	/*
	 * If we failed to assign proper bus numbers for this cardbus
	 * controller during PCI probe, its subordinate pci_bus is NULL.
	 * Bail out if so.
	 */
	if (!dev->subordinate) {
		dev_printk(KERN_ERR, &dev->dev, "no bus associated! "
			   "(try 'pci=assign-busses')\n");
		return -ENODEV;
	}

	socket = kzalloc(sizeof(struct yenta_socket), GFP_KERNEL);
	if (!socket)
		return -ENOMEM;

	/* prepare pcmcia_socket */
	socket->socket.ops = &yenta_socket_operations;
	socket->socket.resource_ops = &pccard_nonstatic_ops;
	socket->socket.dev.parent = &dev->dev;
	socket->socket.driver_data = socket;
	socket->socket.owner = THIS_MODULE;
	socket->socket.features = SS_CAP_PAGE_REGS | SS_CAP_PCCARD;
	socket->socket.map_size = 0x1000;
	socket->socket.cb_dev = dev;

	/* 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)) {
		dev_printk(KERN_ERR, &dev->dev, "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...
	 */
	dev_printk(KERN_INFO, &dev->dev, "CardBus bridge found [%04x:%04x]\n",
		   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, IRQF_SHARED, "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);
		dev_printk(KERN_INFO, &dev->dev,
			   "no PCI IRQ, CardBus support disabled for this "
			   "socket.\n");
		dev_printk(KERN_INFO, &dev->dev,
			   "check your BIOS CardBus, BIOS IRQ or ACPI "
			   "settings.\n");
	} else {
		socket->socket.features |= SS_CAP_CARDBUS;
	}

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

	yenta_fixup_parent_bridge(dev->subordinate);

	/* Register it with the pcmcia layer.. */
	ret = pcmcia_register_socket(&socket->socket);
	if (ret == 0) {
		/* Add the yenta register attributes */
		ret = device_create_file(&dev->dev, &dev_attr_yenta_registers);
		if (ret == 0)
			goto out;

		/* error path... */
		pcmcia_unregister_socket(&socket->socket);
	}

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

#ifdef CONFIG_PM
static int yenta_dev_suspend_noirq(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct yenta_socket *socket = pci_get_drvdata(pdev);

	if (!socket)
		return 0;

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

	pci_save_state(pdev);
	pci_read_config_dword(pdev, 16*4, &socket->saved_state[0]);
	pci_read_config_dword(pdev, 17*4, &socket->saved_state[1]);
	pci_disable_device(pdev);

	return 0;
}

static int yenta_dev_resume_noirq(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct yenta_socket *socket = pci_get_drvdata(pdev);
	int ret;

	if (!socket)
		return 0;

	pci_write_config_dword(pdev, 16*4, socket->saved_state[0]);
	pci_write_config_dword(pdev, 17*4, socket->saved_state[1]);

	ret = pci_enable_device(pdev);
	if (ret)
		return ret;

	pci_set_master(pdev);

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

	return 0;
}

static const struct dev_pm_ops yenta_pm_ops = {
	.suspend_noirq = yenta_dev_suspend_noirq,
	.resume_noirq = yenta_dev_resume_noirq,
	.freeze_noirq = yenta_dev_suspend_noirq,
	.thaw_noirq = yenta_dev_resume_noirq,
	.poweroff_noirq = yenta_dev_suspend_noirq,
	.restore_noirq = yenta_dev_resume_noirq,
};

#define YENTA_PM_OPS	(&yenta_pm_ops)
#else
#define YENTA_PM_OPS	NULL
#endif

#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)
	 */
#ifdef CONFIG_YENTA_TI
	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_TI, PCI_DEVICE_ID_TI_XX21_XX11, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_X515, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_X420, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_X620, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_7410, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_7510, TI12XX),
	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_7610, TI12XX),

	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_710, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_712, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_720, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_722, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1211, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1225, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1410, ENE),
	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1420, ENE),
#endif /* CONFIG_YENTA_TI */

#ifdef CONFIG_YENTA_RICOH
	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),
#endif

#ifdef CONFIG_YENTA_TOSHIBA
	CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC95, TOPIC95),
	CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC97, TOPIC97),
	CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC100, TOPIC97),
#endif

#ifdef CONFIG_YENTA_O2
	CB_ID(PCI_VENDOR_ID_O2, PCI_ANY_ID, O2MICRO),
#endif

	/* 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),
	.driver.pm	= YENTA_PM_OPS,
};


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");

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