drivers/ata/pata_winbond.c - android_kernel_htc_msm8960 - Gitiles

 /*
  *    pata_winbond.c - Winbond VLB ATA controllers
  *	(C) 2006 Red Hat
  *
  *    Support for the Winbond 83759A when operating in advanced mode.
  *    Multichip mode is not currently supported.
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/blkdev.h>
 #include <linux/delay.h>
 #include <scsi/scsi_host.h>
 #include <linux/libata.h>
 #include <linux/platform_device.h>

 #define DRV_NAME "pata_winbond"
 #define DRV_VERSION "0.0.3"

 #define NR_HOST 4	/* Two winbond controllers, two channels each */

 struct winbond_data {
 	unsigned long config;
 	struct platform_device *platform_dev;
 };

 static struct ata_host *winbond_host[NR_HOST];
 static struct winbond_data winbond_data[NR_HOST];
 static int nr_winbond_host;

 #ifdef MODULE
 static int probe_winbond = 1;
 #else
 static int probe_winbond;
 #endif

 static DEFINE_SPINLOCK(winbond_lock);

 static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
 {
 	unsigned long flags;
 	spin_lock_irqsave(&winbond_lock, flags);
 	outb(reg, port + 0x01);
 	outb(val, port + 0x02);
 	spin_unlock_irqrestore(&winbond_lock, flags);
 }

 static u8 winbond_readcfg(unsigned long port, u8 reg)
 {
 	u8 val;

 	unsigned long flags;
 	spin_lock_irqsave(&winbond_lock, flags);
 	outb(reg, port + 0x01);
 	val = inb(port + 0x02);
 	spin_unlock_irqrestore(&winbond_lock, flags);

 	return val;
 }

 static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
 {
 	struct ata_timing t;
 	struct winbond_data *winbond = ap->host->private_data;
 	int active, recovery;
 	u8 reg;
 	int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);

 	reg = winbond_readcfg(winbond->config, 0x81);

 	/* Get the timing data in cycles */
 	if (reg & 0x40)		/* Fast VLB bus, assume 50MHz */
 		ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
 	else
 		ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);

 	active = (clamp_val(t.active, 3, 17) - 1) & 0x0F;
 	recovery = (clamp_val(t.recover, 1, 15) + 1) & 0x0F;
 	timing = (active << 4) | recovery;
 	winbond_writecfg(winbond->config, timing, reg);

 	/* Load the setup timing */

 	reg = 0x35;
 	if (adev->class != ATA_DEV_ATA)
 		reg |= 0x08;	/* FIFO off */
 	if (!ata_pio_need_iordy(adev))
 		reg |= 0x02;	/* IORDY off */
 	reg |= (clamp_val(t.setup, 0, 3) << 6);
 	winbond_writecfg(winbond->config, timing + 1, reg);
 }


 static unsigned int winbond_data_xfer(struct ata_device *dev,
 			unsigned char *buf, unsigned int buflen, int rw)
 {
 	struct ata_port *ap = dev->link->ap;
 	int slop = buflen & 3;

 	if (ata_id_has_dword_io(dev->id)) {
 		if (rw == READ)
 			ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
 		else
 			iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);

 		if (unlikely(slop)) {
 			__le32 pad;
 			if (rw == READ) {
 				pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
 				memcpy(buf + buflen - slop, &pad, slop);
 			} else {
 				memcpy(&pad, buf + buflen - slop, slop);
 				iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
 			}
 			buflen += 4 - slop;
 		}
 	} else
 		buflen = ata_sff_data_xfer(dev, buf, buflen, rw);

 	return buflen;
 }

 static struct scsi_host_template winbond_sht = {
 	ATA_PIO_SHT(DRV_NAME),
 };

 static struct ata_port_operations winbond_port_ops = {
 	.inherits	= &ata_sff_port_ops,
 	.sff_data_xfer	= winbond_data_xfer,
 	.cable_detect	= ata_cable_40wire,
 	.set_piomode	= winbond_set_piomode,
 };

 /**
  *	winbond_init_one		-	attach a winbond interface
  *	@type: Type to display
  *	@io: I/O port start
  *	@irq: interrupt line
  *	@fast: True if on a > 33Mhz VLB
  *
  *	Register a VLB bus IDE interface. Such interfaces are PIO and we
  *	assume do not support IRQ sharing.
  */

 static __init int winbond_init_one(unsigned long port)
 {
 	struct platform_device *pdev;
 	u8 reg;
 	int i, rc;

 	reg = winbond_readcfg(port, 0x81);
 	reg |= 0x80;	/* jumpered mode off */
 	winbond_writecfg(port, 0x81, reg);
 	reg = winbond_readcfg(port, 0x83);
 	reg |= 0xF0;	/* local control */
 	winbond_writecfg(port, 0x83, reg);
 	reg = winbond_readcfg(port, 0x85);
 	reg |= 0xF0;	/* programmable timing */
 	winbond_writecfg(port, 0x85, reg);

 	reg = winbond_readcfg(port, 0x81);

 	if (!(reg & 0x03))		/* Disabled */
 		return -ENODEV;

 	for (i = 0; i < 2 ; i ++) {
 		unsigned long cmd_port = 0x1F0 - (0x80 * i);
 		unsigned long ctl_port = cmd_port + 0x206;
 		struct ata_host *host;
 		struct ata_port *ap;
 		void __iomem *cmd_addr, *ctl_addr;

 		if (!(reg & (1 << i)))
 			continue;

 		pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
 		if (IS_ERR(pdev))
 			return PTR_ERR(pdev);

 		rc = -ENOMEM;
 		host = ata_host_alloc(&pdev->dev, 1);
 		if (!host)
 			goto err_unregister;
 		ap = host->ports[0];

 		rc = -ENOMEM;
 		cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
 		ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1);
 		if (!cmd_addr || !ctl_addr)
 			goto err_unregister;

 		ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);

 		ap->ops = &winbond_port_ops;
 		ap->pio_mask = ATA_PIO4;
 		ap->flags |= ATA_FLAG_SLAVE_POSS;
 		ap->ioaddr.cmd_addr = cmd_addr;
 		ap->ioaddr.altstatus_addr = ctl_addr;
 		ap->ioaddr.ctl_addr = ctl_addr;
 		ata_sff_std_ports(&ap->ioaddr);

 		/* hook in a private data structure per channel */
 		host->private_data = &winbond_data[nr_winbond_host];
 		winbond_data[nr_winbond_host].config = port;
 		winbond_data[nr_winbond_host].platform_dev = pdev;

 		/* activate */
 		rc = ata_host_activate(host, 14 + i, ata_sff_interrupt, 0,
 				       &winbond_sht);
 		if (rc)
 			goto err_unregister;

 		winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
 	}

 	return 0;

  err_unregister:
 	platform_device_unregister(pdev);
 	return rc;
 }

 /**
  *	winbond_init		-	attach winbond interfaces
  *
  *	Attach winbond IDE interfaces by scanning the ports it may occupy.
  */

 static __init int winbond_init(void)
 {
 	static const unsigned long config[2] = { 0x130, 0x1B0 };

 	int ct = 0;
 	int i;

 	if (probe_winbond == 0)
 		return -ENODEV;

 	/*
  	 *	Check both base addresses
 	 */

 	for (i = 0; i < 2; i++) {
 		if (probe_winbond & (1<<i)) {
 			int ret = 0;
 			unsigned long port = config[i];

 			if (request_region(port, 2, "pata_winbond")) {
 				ret = winbond_init_one(port);
 				if (ret <= 0)
 					release_region(port, 2);
 				else ct+= ret;
 			}
 		}
 	}
 	if (ct != 0)
 		return 0;
 	return -ENODEV;
 }

 static __exit void winbond_exit(void)
 {
 	int i;

 	for (i = 0; i < nr_winbond_host; i++) {
 		ata_host_detach(winbond_host[i]);
 		release_region(winbond_data[i].config, 2);
 		platform_device_unregister(winbond_data[i].platform_dev);
 	}
 }

 MODULE_AUTHOR("Alan Cox");
 MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_VERSION);

 module_init(winbond_init);
 module_exit(winbond_exit);

 module_param(probe_winbond, int, 0);
	/*
	* pata_winbond.c - Winbond VLB ATA controllers
	* (C) 2006 Red Hat
	*
	* Support for the Winbond 83759A when operating in advanced mode.
	* Multichip mode is not currently supported.
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/blkdev.h>
	#include <linux/delay.h>
	#include <scsi/scsi_host.h>
	#include <linux/libata.h>
	#include <linux/platform_device.h>

	#define DRV_NAME "pata_winbond"
	#define DRV_VERSION "0.0.3"

	#define NR_HOST 4 /* Two winbond controllers, two channels each */

	struct winbond_data {
	unsigned long config;
	struct platform_device *platform_dev;
	};

	static struct ata_host *winbond_host[NR_HOST];
	static struct winbond_data winbond_data[NR_HOST];
	static int nr_winbond_host;

	#ifdef MODULE
	static int probe_winbond = 1;
	#else
	static int probe_winbond;
	#endif

	static DEFINE_SPINLOCK(winbond_lock);

	static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
	{
	unsigned long flags;
	spin_lock_irqsave(&winbond_lock, flags);
	outb(reg, port + 0x01);
	outb(val, port + 0x02);
	spin_unlock_irqrestore(&winbond_lock, flags);
	}

	static u8 winbond_readcfg(unsigned long port, u8 reg)
	{
	u8 val;

	unsigned long flags;
	spin_lock_irqsave(&winbond_lock, flags);
	outb(reg, port + 0x01);
	val = inb(port + 0x02);
	spin_unlock_irqrestore(&winbond_lock, flags);

	return val;
	}

	static void winbond_set_piomode(struct ata_port ap, struct ata_device adev)
	{
	struct ata_timing t;
	struct winbond_data *winbond = ap->host->private_data;
	int active, recovery;
	u8 reg;
	int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);

	reg = winbond_readcfg(winbond->config, 0x81);

	/* Get the timing data in cycles */
	if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
	ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
	else
	ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);

	active = (clamp_val(t.active, 3, 17) - 1) & 0x0F;
	recovery = (clamp_val(t.recover, 1, 15) + 1) & 0x0F;
	timing = (active << 4) \| recovery;
	winbond_writecfg(winbond->config, timing, reg);

	/* Load the setup timing */

	reg = 0x35;
	if (adev->class != ATA_DEV_ATA)
	reg \|= 0x08; /* FIFO off */
	if (!ata_pio_need_iordy(adev))
	reg \|= 0x02; /* IORDY off */
	reg \|= (clamp_val(t.setup, 0, 3) << 6);
	winbond_writecfg(winbond->config, timing + 1, reg);
	}


	static unsigned int winbond_data_xfer(struct ata_device *dev,
	unsigned char *buf, unsigned int buflen, int rw)
	{
	struct ata_port *ap = dev->link->ap;
	int slop = buflen & 3;

	if (ata_id_has_dword_io(dev->id)) {
	if (rw == READ)
	ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
	else
	iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);

	if (unlikely(slop)) {
	__le32 pad;
	if (rw == READ) {
	pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
	memcpy(buf + buflen - slop, &pad, slop);
	} else {
	memcpy(&pad, buf + buflen - slop, slop);
	iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
	}
	buflen += 4 - slop;
	}
	} else
	buflen = ata_sff_data_xfer(dev, buf, buflen, rw);

	return buflen;
	}

	static struct scsi_host_template winbond_sht = {
	ATA_PIO_SHT(DRV_NAME),
	};

	static struct ata_port_operations winbond_port_ops = {
	.inherits = &ata_sff_port_ops,
	.sff_data_xfer = winbond_data_xfer,
	.cable_detect = ata_cable_40wire,
	.set_piomode = winbond_set_piomode,
	};

	/**
	* winbond_init_one - attach a winbond interface
	* @type: Type to display
	* @io: I/O port start
	* @irq: interrupt line
	* @fast: True if on a > 33Mhz VLB
	*
	* Register a VLB bus IDE interface. Such interfaces are PIO and we
	* assume do not support IRQ sharing.
	*/

	static __init int winbond_init_one(unsigned long port)
	{
	struct platform_device *pdev;
	u8 reg;
	int i, rc;

	reg = winbond_readcfg(port, 0x81);
	reg \|= 0x80; /* jumpered mode off */
	winbond_writecfg(port, 0x81, reg);
	reg = winbond_readcfg(port, 0x83);
	reg \|= 0xF0; /* local control */
	winbond_writecfg(port, 0x83, reg);
	reg = winbond_readcfg(port, 0x85);
	reg \|= 0xF0; /* programmable timing */
	winbond_writecfg(port, 0x85, reg);

	reg = winbond_readcfg(port, 0x81);

	if (!(reg & 0x03)) /* Disabled */
	return -ENODEV;

	for (i = 0; i < 2 ; i ++) {
	unsigned long cmd_port = 0x1F0 - (0x80 * i);
	unsigned long ctl_port = cmd_port + 0x206;
	struct ata_host *host;
	struct ata_port *ap;
	void __iomem cmd_addr, ctl_addr;

	if (!(reg & (1 << i)))
	continue;

	pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
	if (IS_ERR(pdev))
	return PTR_ERR(pdev);

	rc = -ENOMEM;
	host = ata_host_alloc(&pdev->dev, 1);
	if (!host)
	goto err_unregister;
	ap = host->ports[0];

	rc = -ENOMEM;
	cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
	ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1);
	if (!cmd_addr \|\| !ctl_addr)
	goto err_unregister;

	ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);

	ap->ops = &winbond_port_ops;
	ap->pio_mask = ATA_PIO4;
	ap->flags \|= ATA_FLAG_SLAVE_POSS;
	ap->ioaddr.cmd_addr = cmd_addr;
	ap->ioaddr.altstatus_addr = ctl_addr;
	ap->ioaddr.ctl_addr = ctl_addr;
	ata_sff_std_ports(&ap->ioaddr);

	/* hook in a private data structure per channel */
	host->private_data = &winbond_data[nr_winbond_host];
	winbond_data[nr_winbond_host].config = port;
	winbond_data[nr_winbond_host].platform_dev = pdev;

	/* activate */
	rc = ata_host_activate(host, 14 + i, ata_sff_interrupt, 0,
	&winbond_sht);
	if (rc)
	goto err_unregister;

	winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
	}

	return 0;

	err_unregister:
	platform_device_unregister(pdev);
	return rc;
	}

	/**
	* winbond_init - attach winbond interfaces
	*
	* Attach winbond IDE interfaces by scanning the ports it may occupy.
	*/

	static __init int winbond_init(void)
	{
	static const unsigned long config[2] = { 0x130, 0x1B0 };

	int ct = 0;
	int i;

	if (probe_winbond == 0)
	return -ENODEV;

	/*
	* Check both base addresses
	*/

	for (i = 0; i < 2; i++) {
	if (probe_winbond & (1<<i)) {
	int ret = 0;
	unsigned long port = config[i];

	if (request_region(port, 2, "pata_winbond")) {
	ret = winbond_init_one(port);
	if (ret <= 0)
	release_region(port, 2);
	else ct+= ret;
	}
	}
	}
	if (ct != 0)
	return 0;
	return -ENODEV;
	}

	static __exit void winbond_exit(void)
	{
	int i;

	for (i = 0; i < nr_winbond_host; i++) {
	ata_host_detach(winbond_host[i]);
	release_region(winbond_data[i].config, 2);
	platform_device_unregister(winbond_data[i].platform_dev);
	}
	}

	MODULE_AUTHOR("Alan Cox");
	MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
	MODULE_LICENSE("GPL");
	MODULE_VERSION(DRV_VERSION);

	module_init(winbond_init);
	module_exit(winbond_exit);

	module_param(probe_winbond, int, 0);