drivers/misc/tifm_7xx1.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  *  tifm_7xx1.c - TI FlashMedia driver
  *
  *  Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
  */

 #include <linux/tifm.h>
 #include <linux/dma-mapping.h>
 #include <linux/module.h>

 #define DRIVER_NAME "tifm_7xx1"
 #define DRIVER_VERSION "0.8"

 #define TIFM_IRQ_ENABLE           0x80000000
 #define TIFM_IRQ_SOCKMASK(x)      (x)
 #define TIFM_IRQ_CARDMASK(x)      ((x) << 8)
 #define TIFM_IRQ_FIFOMASK(x)      ((x) << 16)
 #define TIFM_IRQ_SETALL           0xffffffff

 static void tifm_7xx1_dummy_eject(struct tifm_adapter *fm,
 				  struct tifm_dev *sock)
 {
 }

 static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
 {
 	unsigned long flags;

 	spin_lock_irqsave(&fm->lock, flags);
 	fm->socket_change_set |= 1 << sock->socket_id;
 	tifm_queue_work(&fm->media_switcher);
 	spin_unlock_irqrestore(&fm->lock, flags);
 }

 static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
 {
 	struct tifm_adapter *fm = dev_id;
 	struct tifm_dev *sock;
 	unsigned int irq_status, cnt;

 	spin_lock(&fm->lock);
 	irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
 	if (irq_status == 0 || irq_status == (~0)) {
 		spin_unlock(&fm->lock);
 		return IRQ_NONE;
 	}

 	if (irq_status & TIFM_IRQ_ENABLE) {
 		writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);

 		for (cnt = 0; cnt < fm->num_sockets; cnt++) {
 			sock = fm->sockets[cnt];
 			if (sock) {
 				if ((irq_status >> cnt) & TIFM_IRQ_FIFOMASK(1))
 					sock->data_event(sock);
 				if ((irq_status >> cnt) & TIFM_IRQ_CARDMASK(1))
 					sock->card_event(sock);
 			}
 		}

 		fm->socket_change_set |= irq_status
 					 & ((1 << fm->num_sockets) - 1);
 	}
 	writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);

 	if (fm->finish_me)
 		complete_all(fm->finish_me);
 	else if (!fm->socket_change_set)
 		writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
 	else
 		tifm_queue_work(&fm->media_switcher);

 	spin_unlock(&fm->lock);
 	return IRQ_HANDLED;
 }

 static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
 {
 	unsigned int s_state;
 	int cnt;

 	writel(0x0e00, sock_addr + SOCK_CONTROL);

 	for (cnt = 16; cnt <= 256; cnt <<= 1) {
 		if (!(TIFM_SOCK_STATE_POWERED
 		      & readl(sock_addr + SOCK_PRESENT_STATE)))
 			break;

 		msleep(cnt);
 	}

 	s_state = readl(sock_addr + SOCK_PRESENT_STATE);
 	if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
 		return 0;

 	writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
 	       sock_addr + SOCK_CONTROL);

 	/* xd needs some extra time before power on */
 	if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7)
 	    == TIFM_TYPE_XD)
 		msleep(40);

 	writel((s_state & TIFM_CTRL_POWER_MASK) | 0x0c00,
 	       sock_addr + SOCK_CONTROL);
 	/* wait for power to stabilize */
 	msleep(20);
 	for (cnt = 16; cnt <= 256; cnt <<= 1) {
 		if ((TIFM_SOCK_STATE_POWERED
 		     & readl(sock_addr + SOCK_PRESENT_STATE)))
 			break;

 		msleep(cnt);
 	}

 	writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
 	       sock_addr + SOCK_CONTROL);

 	return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
 }

 inline static void tifm_7xx1_sock_power_off(char __iomem *sock_addr)
 {
 	writel((~TIFM_CTRL_POWER_MASK) & readl(sock_addr + SOCK_CONTROL),
 	       sock_addr + SOCK_CONTROL);
 }

 inline static char __iomem *
 tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
 {
 	return base_addr + ((sock_num + 1) << 10);
 }

 static void tifm_7xx1_switch_media(struct work_struct *work)
 {
 	struct tifm_adapter *fm = container_of(work, struct tifm_adapter,
 					       media_switcher);
 	struct tifm_dev *sock;
 	char __iomem *sock_addr;
 	unsigned long flags;
 	unsigned char media_id;
 	unsigned int socket_change_set, cnt;

 	spin_lock_irqsave(&fm->lock, flags);
 	socket_change_set = fm->socket_change_set;
 	fm->socket_change_set = 0;

 	dev_dbg(fm->dev.parent, "checking media set %x\n",
 		socket_change_set);

 	if (!socket_change_set) {
 		spin_unlock_irqrestore(&fm->lock, flags);
 		return;
 	}

 	for (cnt = 0; cnt < fm->num_sockets; cnt++) {
 		if (!(socket_change_set & (1 << cnt)))
 			continue;
 		sock = fm->sockets[cnt];
 		if (sock) {
 			printk(KERN_INFO
 			       "%s : demand removing card from socket %u:%u\n",
 			       dev_name(&fm->dev), fm->id, cnt);
 			fm->sockets[cnt] = NULL;
 			sock_addr = sock->addr;
 			spin_unlock_irqrestore(&fm->lock, flags);
 			device_unregister(&sock->dev);
 			spin_lock_irqsave(&fm->lock, flags);
 			tifm_7xx1_sock_power_off(sock_addr);
 			writel(0x0e00, sock_addr + SOCK_CONTROL);
 		}

 		spin_unlock_irqrestore(&fm->lock, flags);

 		media_id = tifm_7xx1_toggle_sock_power(
 				tifm_7xx1_sock_addr(fm->addr, cnt));

 		// tifm_alloc_device will check if media_id is valid
 		sock = tifm_alloc_device(fm, cnt, media_id);
 		if (sock) {
 			sock->addr = tifm_7xx1_sock_addr(fm->addr, cnt);

 			if (!device_register(&sock->dev)) {
 				spin_lock_irqsave(&fm->lock, flags);
 				if (!fm->sockets[cnt]) {
 					fm->sockets[cnt] = sock;
 					sock = NULL;
 				}
 				spin_unlock_irqrestore(&fm->lock, flags);
 			}
 			if (sock)
 				tifm_free_device(&sock->dev);
 		}
 		spin_lock_irqsave(&fm->lock, flags);
 	}

 	writel(TIFM_IRQ_FIFOMASK(socket_change_set)
 	       | TIFM_IRQ_CARDMASK(socket_change_set),
 	       fm->addr + FM_CLEAR_INTERRUPT_ENABLE);

 	writel(TIFM_IRQ_FIFOMASK(socket_change_set)
 	       | TIFM_IRQ_CARDMASK(socket_change_set),
 	       fm->addr + FM_SET_INTERRUPT_ENABLE);

 	writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
 	spin_unlock_irqrestore(&fm->lock, flags);
 }

 #ifdef CONFIG_PM

 static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
 {
 	struct tifm_adapter *fm = pci_get_drvdata(dev);
 	int cnt;

 	dev_dbg(&dev->dev, "suspending host\n");

 	for (cnt = 0; cnt < fm->num_sockets; cnt++) {
 		if (fm->sockets[cnt])
 			tifm_7xx1_sock_power_off(fm->sockets[cnt]->addr);
 	}

 	pci_save_state(dev);
 	pci_enable_wake(dev, pci_choose_state(dev, state), 0);
 	pci_disable_device(dev);
 	pci_set_power_state(dev, pci_choose_state(dev, state));
 	return 0;
 }

 static int tifm_7xx1_resume(struct pci_dev *dev)
 {
 	struct tifm_adapter *fm = pci_get_drvdata(dev);
 	int rc;
 	unsigned long timeout;
 	unsigned int good_sockets = 0, bad_sockets = 0;
 	unsigned long flags;
 	/* Maximum number of entries is 4 */
 	unsigned char new_ids[4];
 	DECLARE_COMPLETION_ONSTACK(finish_resume);

 	if (WARN_ON(fm->num_sockets > ARRAY_SIZE(new_ids)))
 		return -ENXIO;

 	pci_set_power_state(dev, PCI_D0);
 	pci_restore_state(dev);
 	rc = pci_enable_device(dev);
 	if (rc)
 		return rc;
 	pci_set_master(dev);

 	dev_dbg(&dev->dev, "resuming host\n");

 	for (rc = 0; rc < fm->num_sockets; rc++)
 		new_ids[rc] = tifm_7xx1_toggle_sock_power(
 					tifm_7xx1_sock_addr(fm->addr, rc));
 	spin_lock_irqsave(&fm->lock, flags);
 	for (rc = 0; rc < fm->num_sockets; rc++) {
 		if (fm->sockets[rc]) {
 			if (fm->sockets[rc]->type == new_ids[rc])
 				good_sockets |= 1 << rc;
 			else
 				bad_sockets |= 1 << rc;
 		}
 	}

 	writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
 	       fm->addr + FM_SET_INTERRUPT_ENABLE);
 	dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n",
 		good_sockets, bad_sockets);

 	fm->socket_change_set = 0;
 	if (good_sockets) {
 		fm->finish_me = &finish_resume;
 		spin_unlock_irqrestore(&fm->lock, flags);
 		timeout = wait_for_completion_timeout(&finish_resume, HZ);
 		dev_dbg(&dev->dev, "wait returned %lu\n", timeout);
 		writel(TIFM_IRQ_FIFOMASK(good_sockets)
 		       | TIFM_IRQ_CARDMASK(good_sockets),
 		       fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 		writel(TIFM_IRQ_FIFOMASK(good_sockets)
 		       | TIFM_IRQ_CARDMASK(good_sockets),
 		       fm->addr + FM_SET_INTERRUPT_ENABLE);
 		spin_lock_irqsave(&fm->lock, flags);
 		fm->finish_me = NULL;
 		fm->socket_change_set ^= good_sockets & fm->socket_change_set;
 	}

 	fm->socket_change_set |= bad_sockets;
 	if (fm->socket_change_set)
 		tifm_queue_work(&fm->media_switcher);

 	spin_unlock_irqrestore(&fm->lock, flags);
 	writel(TIFM_IRQ_ENABLE,
 	       fm->addr + FM_SET_INTERRUPT_ENABLE);

 	return 0;
 }

 #else

 #define tifm_7xx1_suspend NULL
 #define tifm_7xx1_resume NULL

 #endif /* CONFIG_PM */

 static int tifm_7xx1_dummy_has_ms_pif(struct tifm_adapter *fm,
 				      struct tifm_dev *sock)
 {
 	return 0;
 }

 static int tifm_7xx1_has_ms_pif(struct tifm_adapter *fm, struct tifm_dev *sock)
 {
 	if (((fm->num_sockets == 4) && (sock->socket_id == 2))
 	    || ((fm->num_sockets == 2) && (sock->socket_id == 0)))
 		return 1;

 	return 0;
 }

 static int tifm_7xx1_probe(struct pci_dev *dev,
 			   const struct pci_device_id *dev_id)
 {
 	struct tifm_adapter *fm;
 	int pci_dev_busy = 0;
 	int rc;

 	rc = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
 	if (rc)
 		return rc;

 	rc = pci_enable_device(dev);
 	if (rc)
 		return rc;

 	pci_set_master(dev);

 	rc = pci_request_regions(dev, DRIVER_NAME);
 	if (rc) {
 		pci_dev_busy = 1;
 		goto err_out;
 	}

 	pci_intx(dev, 1);

 	fm = tifm_alloc_adapter(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM
 				? 4 : 2, &dev->dev);
 	if (!fm) {
 		rc = -ENOMEM;
 		goto err_out_int;
 	}

 	INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media);
 	fm->eject = tifm_7xx1_eject;
 	fm->has_ms_pif = tifm_7xx1_has_ms_pif;
 	pci_set_drvdata(dev, fm);

 	fm->addr = pci_ioremap_bar(dev, 0);
 	if (!fm->addr) {
 		rc = -ENODEV;
 		goto err_out_free;
 	}

 	rc = request_irq(dev->irq, tifm_7xx1_isr, IRQF_SHARED, DRIVER_NAME, fm);
 	if (rc)
 		goto err_out_unmap;

 	rc = tifm_add_adapter(fm);
 	if (rc)
 		goto err_out_irq;

 	writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
 	       fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 	writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
 	       fm->addr + FM_SET_INTERRUPT_ENABLE);
 	return 0;

 err_out_irq:
 	free_irq(dev->irq, fm);
 err_out_unmap:
 	iounmap(fm->addr);
 err_out_free:
 	tifm_free_adapter(fm);
 err_out_int:
 	pci_intx(dev, 0);
 	pci_release_regions(dev);
 err_out:
 	if (!pci_dev_busy)
 		pci_disable_device(dev);
 	return rc;
 }

 static void tifm_7xx1_remove(struct pci_dev *dev)
 {
 	struct tifm_adapter *fm = pci_get_drvdata(dev);
 	int cnt;

 	fm->eject = tifm_7xx1_dummy_eject;
 	fm->has_ms_pif = tifm_7xx1_dummy_has_ms_pif;
 	writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 	free_irq(dev->irq, fm);

 	tifm_remove_adapter(fm);

 	for (cnt = 0; cnt < fm->num_sockets; cnt++)
 		tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt));

 	iounmap(fm->addr);
 	pci_intx(dev, 0);
 	pci_release_regions(dev);

 	pci_disable_device(dev);
 	tifm_free_adapter(fm);
 }

 static const struct pci_device_id tifm_7xx1_pci_tbl[] = {
 	{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID,
 	  PCI_ANY_ID, 0, 0, 0 }, /* xx21 - the one I have */
         { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID,
 	  PCI_ANY_ID, 0, 0, 0 },
 	{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID,
 	  PCI_ANY_ID, 0, 0, 0 },
 	{ }
 };

 static struct pci_driver tifm_7xx1_driver = {
 	.name = DRIVER_NAME,
 	.id_table = tifm_7xx1_pci_tbl,
 	.probe = tifm_7xx1_probe,
 	.remove = tifm_7xx1_remove,
 	.suspend = tifm_7xx1_suspend,
 	.resume = tifm_7xx1_resume,
 };

 module_pci_driver(tifm_7xx1_driver);
 MODULE_AUTHOR("Alex Dubov");
 MODULE_DESCRIPTION("TI FlashMedia host driver");
 MODULE_LICENSE("GPL");
 MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
 MODULE_VERSION(DRIVER_VERSION);
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* tifm_7xx1.c - TI FlashMedia driver
	*
	* Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
	*/

	#include <linux/tifm.h>
	#include <linux/dma-mapping.h>
	#include <linux/module.h>

	#define DRIVER_NAME "tifm_7xx1"
	#define DRIVER_VERSION "0.8"

	#define TIFM_IRQ_ENABLE 0x80000000
	#define TIFM_IRQ_SOCKMASK(x) (x)
	#define TIFM_IRQ_CARDMASK(x) ((x) << 8)
	#define TIFM_IRQ_FIFOMASK(x) ((x) << 16)
	#define TIFM_IRQ_SETALL 0xffffffff

	static void tifm_7xx1_dummy_eject(struct tifm_adapter *fm,
	struct tifm_dev *sock)
	{
	}

	static void tifm_7xx1_eject(struct tifm_adapter fm, struct tifm_dev sock)
	{
	unsigned long flags;

	spin_lock_irqsave(&fm->lock, flags);
	fm->socket_change_set \|= 1 << sock->socket_id;
	tifm_queue_work(&fm->media_switcher);
	spin_unlock_irqrestore(&fm->lock, flags);
	}

	static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
	{
	struct tifm_adapter *fm = dev_id;
	struct tifm_dev *sock;
	unsigned int irq_status, cnt;

	spin_lock(&fm->lock);
	irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
	if (irq_status == 0 \|\| irq_status == (~0)) {
	spin_unlock(&fm->lock);
	return IRQ_NONE;
	}

	if (irq_status & TIFM_IRQ_ENABLE) {
	writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);

	for (cnt = 0; cnt < fm->num_sockets; cnt++) {
	sock = fm->sockets[cnt];
	if (sock) {
	if ((irq_status >> cnt) & TIFM_IRQ_FIFOMASK(1))
	sock->data_event(sock);
	if ((irq_status >> cnt) & TIFM_IRQ_CARDMASK(1))
	sock->card_event(sock);
	}
	}

	fm->socket_change_set \|= irq_status
	& ((1 << fm->num_sockets) - 1);
	}
	writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);

	if (fm->finish_me)
	complete_all(fm->finish_me);
	else if (!fm->socket_change_set)
	writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
	else
	tifm_queue_work(&fm->media_switcher);

	spin_unlock(&fm->lock);
	return IRQ_HANDLED;
	}

	static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
	{
	unsigned int s_state;
	int cnt;

	writel(0x0e00, sock_addr + SOCK_CONTROL);

	for (cnt = 16; cnt <= 256; cnt <<= 1) {
	if (!(TIFM_SOCK_STATE_POWERED
	& readl(sock_addr + SOCK_PRESENT_STATE)))
	break;

	msleep(cnt);
	}

	s_state = readl(sock_addr + SOCK_PRESENT_STATE);
	if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
	return 0;

	writel(readl(sock_addr + SOCK_CONTROL) \| TIFM_CTRL_LED,
	sock_addr + SOCK_CONTROL);

	/* xd needs some extra time before power on */
	if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7)
	== TIFM_TYPE_XD)
	msleep(40);

	writel((s_state & TIFM_CTRL_POWER_MASK) \| 0x0c00,
	sock_addr + SOCK_CONTROL);
	/* wait for power to stabilize */
	msleep(20);
	for (cnt = 16; cnt <= 256; cnt <<= 1) {
	if ((TIFM_SOCK_STATE_POWERED
	& readl(sock_addr + SOCK_PRESENT_STATE)))
	break;

	msleep(cnt);
	}

	writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
	sock_addr + SOCK_CONTROL);

	return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
	}

	inline static void tifm_7xx1_sock_power_off(char __iomem *sock_addr)
	{
	writel((~TIFM_CTRL_POWER_MASK) & readl(sock_addr + SOCK_CONTROL),
	sock_addr + SOCK_CONTROL);
	}

	inline static char __iomem *
	tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
	{
	return base_addr + ((sock_num + 1) << 10);
	}

	static void tifm_7xx1_switch_media(struct work_struct *work)
	{
	struct tifm_adapter *fm = container_of(work, struct tifm_adapter,
	media_switcher);
	struct tifm_dev *sock;
	char __iomem *sock_addr;
	unsigned long flags;
	unsigned char media_id;
	unsigned int socket_change_set, cnt;

	spin_lock_irqsave(&fm->lock, flags);
	socket_change_set = fm->socket_change_set;
	fm->socket_change_set = 0;

	dev_dbg(fm->dev.parent, "checking media set %x\n",
	socket_change_set);

	if (!socket_change_set) {
	spin_unlock_irqrestore(&fm->lock, flags);
	return;
	}

	for (cnt = 0; cnt < fm->num_sockets; cnt++) {
	if (!(socket_change_set & (1 << cnt)))
	continue;
	sock = fm->sockets[cnt];
	if (sock) {
	printk(KERN_INFO
	"%s : demand removing card from socket %u:%u\n",
	dev_name(&fm->dev), fm->id, cnt);
	fm->sockets[cnt] = NULL;
	sock_addr = sock->addr;
	spin_unlock_irqrestore(&fm->lock, flags);
	device_unregister(&sock->dev);
	spin_lock_irqsave(&fm->lock, flags);
	tifm_7xx1_sock_power_off(sock_addr);
	writel(0x0e00, sock_addr + SOCK_CONTROL);
	}

	spin_unlock_irqrestore(&fm->lock, flags);

	media_id = tifm_7xx1_toggle_sock_power(
	tifm_7xx1_sock_addr(fm->addr, cnt));

	// tifm_alloc_device will check if media_id is valid
	sock = tifm_alloc_device(fm, cnt, media_id);
	if (sock) {
	sock->addr = tifm_7xx1_sock_addr(fm->addr, cnt);

	if (!device_register(&sock->dev)) {
	spin_lock_irqsave(&fm->lock, flags);
	if (!fm->sockets[cnt]) {
	fm->sockets[cnt] = sock;
	sock = NULL;
	}
	spin_unlock_irqrestore(&fm->lock, flags);
	}
	if (sock)
	tifm_free_device(&sock->dev);
	}
	spin_lock_irqsave(&fm->lock, flags);
	}

	writel(TIFM_IRQ_FIFOMASK(socket_change_set)
	\| TIFM_IRQ_CARDMASK(socket_change_set),
	fm->addr + FM_CLEAR_INTERRUPT_ENABLE);

	writel(TIFM_IRQ_FIFOMASK(socket_change_set)
	\| TIFM_IRQ_CARDMASK(socket_change_set),
	fm->addr + FM_SET_INTERRUPT_ENABLE);

	writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
	spin_unlock_irqrestore(&fm->lock, flags);
	}

	#ifdef CONFIG_PM

	static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
	{
	struct tifm_adapter *fm = pci_get_drvdata(dev);
	int cnt;

	dev_dbg(&dev->dev, "suspending host\n");

	for (cnt = 0; cnt < fm->num_sockets; cnt++) {
	if (fm->sockets[cnt])
	tifm_7xx1_sock_power_off(fm->sockets[cnt]->addr);
	}

	pci_save_state(dev);
	pci_enable_wake(dev, pci_choose_state(dev, state), 0);
	pci_disable_device(dev);
	pci_set_power_state(dev, pci_choose_state(dev, state));
	return 0;
	}

	static int tifm_7xx1_resume(struct pci_dev *dev)
	{
	struct tifm_adapter *fm = pci_get_drvdata(dev);
	int rc;
	unsigned long timeout;
	unsigned int good_sockets = 0, bad_sockets = 0;
	unsigned long flags;
	/* Maximum number of entries is 4 */
	unsigned char new_ids[4];
	DECLARE_COMPLETION_ONSTACK(finish_resume);

	if (WARN_ON(fm->num_sockets > ARRAY_SIZE(new_ids)))
	return -ENXIO;

	pci_set_power_state(dev, PCI_D0);
	pci_restore_state(dev);
	rc = pci_enable_device(dev);
	if (rc)
	return rc;
	pci_set_master(dev);

	dev_dbg(&dev->dev, "resuming host\n");

	for (rc = 0; rc < fm->num_sockets; rc++)
	new_ids[rc] = tifm_7xx1_toggle_sock_power(
	tifm_7xx1_sock_addr(fm->addr, rc));
	spin_lock_irqsave(&fm->lock, flags);
	for (rc = 0; rc < fm->num_sockets; rc++) {
	if (fm->sockets[rc]) {
	if (fm->sockets[rc]->type == new_ids[rc])
	good_sockets \|= 1 << rc;
	else
	bad_sockets \|= 1 << rc;
	}
	}

	writel(TIFM_IRQ_ENABLE \| TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
	fm->addr + FM_SET_INTERRUPT_ENABLE);
	dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n",
	good_sockets, bad_sockets);

	fm->socket_change_set = 0;
	if (good_sockets) {
	fm->finish_me = &finish_resume;
	spin_unlock_irqrestore(&fm->lock, flags);
	timeout = wait_for_completion_timeout(&finish_resume, HZ);
	dev_dbg(&dev->dev, "wait returned %lu\n", timeout);
	writel(TIFM_IRQ_FIFOMASK(good_sockets)
	\| TIFM_IRQ_CARDMASK(good_sockets),
	fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
	writel(TIFM_IRQ_FIFOMASK(good_sockets)
	\| TIFM_IRQ_CARDMASK(good_sockets),
	fm->addr + FM_SET_INTERRUPT_ENABLE);
	spin_lock_irqsave(&fm->lock, flags);
	fm->finish_me = NULL;
	fm->socket_change_set ^= good_sockets & fm->socket_change_set;
	}

	fm->socket_change_set \|= bad_sockets;
	if (fm->socket_change_set)
	tifm_queue_work(&fm->media_switcher);

	spin_unlock_irqrestore(&fm->lock, flags);
	writel(TIFM_IRQ_ENABLE,
	fm->addr + FM_SET_INTERRUPT_ENABLE);

	return 0;
	}

	#else

	#define tifm_7xx1_suspend NULL
	#define tifm_7xx1_resume NULL

	#endif /* CONFIG_PM */

	static int tifm_7xx1_dummy_has_ms_pif(struct tifm_adapter *fm,
	struct tifm_dev *sock)
	{
	return 0;
	}

	static int tifm_7xx1_has_ms_pif(struct tifm_adapter fm, struct tifm_dev sock)
	{
	if (((fm->num_sockets == 4) && (sock->socket_id == 2))
	\|\| ((fm->num_sockets == 2) && (sock->socket_id == 0)))
	return 1;

	return 0;
	}

	static int tifm_7xx1_probe(struct pci_dev *dev,
	const struct pci_device_id *dev_id)
	{
	struct tifm_adapter *fm;
	int pci_dev_busy = 0;
	int rc;

	rc = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
	if (rc)
	return rc;

	rc = pci_enable_device(dev);
	if (rc)
	return rc;

	pci_set_master(dev);

	rc = pci_request_regions(dev, DRIVER_NAME);
	if (rc) {
	pci_dev_busy = 1;
	goto err_out;
	}

	pci_intx(dev, 1);

	fm = tifm_alloc_adapter(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM
	? 4 : 2, &dev->dev);
	if (!fm) {
	rc = -ENOMEM;
	goto err_out_int;
	}

	INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media);
	fm->eject = tifm_7xx1_eject;
	fm->has_ms_pif = tifm_7xx1_has_ms_pif;
	pci_set_drvdata(dev, fm);

	fm->addr = pci_ioremap_bar(dev, 0);
	if (!fm->addr) {
	rc = -ENODEV;
	goto err_out_free;
	}

	rc = request_irq(dev->irq, tifm_7xx1_isr, IRQF_SHARED, DRIVER_NAME, fm);
	if (rc)
	goto err_out_unmap;

	rc = tifm_add_adapter(fm);
	if (rc)
	goto err_out_irq;

	writel(TIFM_IRQ_ENABLE \| TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
	fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
	writel(TIFM_IRQ_ENABLE \| TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
	fm->addr + FM_SET_INTERRUPT_ENABLE);
	return 0;

	err_out_irq:
	free_irq(dev->irq, fm);
	err_out_unmap:
	iounmap(fm->addr);
	err_out_free:
	tifm_free_adapter(fm);
	err_out_int:
	pci_intx(dev, 0);
	pci_release_regions(dev);
	err_out:
	if (!pci_dev_busy)
	pci_disable_device(dev);
	return rc;
	}

	static void tifm_7xx1_remove(struct pci_dev *dev)
	{
	struct tifm_adapter *fm = pci_get_drvdata(dev);
	int cnt;

	fm->eject = tifm_7xx1_dummy_eject;
	fm->has_ms_pif = tifm_7xx1_dummy_has_ms_pif;
	writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
	free_irq(dev->irq, fm);

	tifm_remove_adapter(fm);

	for (cnt = 0; cnt < fm->num_sockets; cnt++)
	tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt));

	iounmap(fm->addr);
	pci_intx(dev, 0);
	pci_release_regions(dev);

	pci_disable_device(dev);
	tifm_free_adapter(fm);
	}

	static const struct pci_device_id tifm_7xx1_pci_tbl[] = {
	{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID,
	PCI_ANY_ID, 0, 0, 0 }, /* xx21 - the one I have */
	{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID,
	PCI_ANY_ID, 0, 0, 0 },
	{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID,
	PCI_ANY_ID, 0, 0, 0 },
	{ }
	};

	static struct pci_driver tifm_7xx1_driver = {
	.name = DRIVER_NAME,
	.id_table = tifm_7xx1_pci_tbl,
	.probe = tifm_7xx1_probe,
	.remove = tifm_7xx1_remove,
	.suspend = tifm_7xx1_suspend,
	.resume = tifm_7xx1_resume,
	};

	module_pci_driver(tifm_7xx1_driver);
	MODULE_AUTHOR("Alex Dubov");
	MODULE_DESCRIPTION("TI FlashMedia host driver");
	MODULE_LICENSE("GPL");
	MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
	MODULE_VERSION(DRIVER_VERSION);