drivers/ata/pata_jmicron.c - fp2-dev/kernel/msm - Gitiles

 /*
  *    pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the
  *			PATA port of the controller. The SATA ports are
  *			driven by AHCI in the usual configuration although
  *			this driver can handle other setups if we need it.
  *
  *	(c) 2006 Red Hat  <alan@redhat.com>
  */

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

 #define DRV_NAME	"pata_jmicron"
 #define DRV_VERSION	"0.1.2"

 typedef enum {
 	PORT_PATA0 = 0,
 	PORT_PATA1 = 1,
 	PORT_SATA = 2,
 } port_type;

 /**
  *	jmicron_pre_reset	-	check for 40/80 pin
  *	@ap: Port
  *
  *	Perform the PATA port setup we need.

  *	On the Jmicron 361/363 there is a single PATA port that can be mapped
  *	either as primary or secondary (or neither). We don't do any policy
  *	and setup here. We assume that has been done by init_one and the
  *	BIOS.
  */

 static int jmicron_pre_reset(struct ata_port *ap)
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	u32 control;
 	u32 control5;
 	int port_mask = 1<< (4 * ap->port_no);
 	int port = ap->port_no;
 	port_type port_map[2];

 	/* Check if our port is enabled */
 	pci_read_config_dword(pdev, 0x40, &control);
 	if ((control & port_mask) == 0)
 		return 0;

 	/* There are two basic mappings. One has the two SATA ports merged
 	   as master/slave and the secondary as PATA, the other has only the
 	   SATA port mapped */
 	if (control & (1 << 23)) {
 		port_map[0] = PORT_SATA;
 		port_map[1] = PORT_PATA0;
 	} else {
 		port_map[0] = PORT_SATA;
 		port_map[1] = PORT_SATA;
 	}

 	/* The 365/366 may have this bit set to map the second PATA port
 	   as the internal primary channel */
 	pci_read_config_dword(pdev, 0x80, &control5);
 	if (control5 & (1<<24))
 		port_map[0] = PORT_PATA1;

 	/* The two ports may then be logically swapped by the firmware */
 	if (control & (1 << 22))
 		port = port ^ 1;

 	/*
 	 *	Now we know which physical port we are talking about we can
 	 *	actually do our cable checking etc. Thankfully we don't need
 	 *	to do the plumbing for other cases.
 	 */
 	switch (port_map[port])
 	{
 	case PORT_PATA0:
 		if (control & (1 << 5))
 			return 0;
 		if (control & (1 << 3))	/* 40/80 pin primary */
 			ap->cbl = ATA_CBL_PATA40;
 		else
 			ap->cbl = ATA_CBL_PATA80;
 		break;
 	case PORT_PATA1:
 		/* Bit 21 is set if the port is enabled */
 		if ((control5 & (1 << 21)) == 0)
 			return 0;
 		if (control5 & (1 << 19))	/* 40/80 pin secondary */
 			ap->cbl = ATA_CBL_PATA40;
 		else
 			ap->cbl = ATA_CBL_PATA80;
 		break;
 	case PORT_SATA:
 		ap->cbl = ATA_CBL_SATA;
 		break;
 	}
 	return ata_std_prereset(ap);
 }

 /**
  *	jmicron_error_handler - Setup and error handler
  *	@ap: Port to handle
  *
  *	LOCKING:
  *	None (inherited from caller).
  */

 static void jmicron_error_handler(struct ata_port *ap)
 {
 	return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
 }

 /* No PIO or DMA methods needed for this device */

 static struct scsi_host_template jmicron_sht = {
 	.module			= THIS_MODULE,
 	.name			= DRV_NAME,
 	.ioctl			= ata_scsi_ioctl,
 	.queuecommand		= ata_scsi_queuecmd,
 	.can_queue		= ATA_DEF_QUEUE,
 	.this_id		= ATA_SHT_THIS_ID,
 	.sg_tablesize		= LIBATA_MAX_PRD,
 	/* Special handling needed if you have sector or LBA48 limits */
 	.max_sectors		= ATA_MAX_SECTORS,
 	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
 	.emulated		= ATA_SHT_EMULATED,
 	.use_clustering		= ATA_SHT_USE_CLUSTERING,
 	.proc_name		= DRV_NAME,
 	.dma_boundary		= ATA_DMA_BOUNDARY,
 	.slave_configure	= ata_scsi_slave_config,
 	/* Use standard CHS mapping rules */
 	.bios_param		= ata_std_bios_param,
 };

 static const struct ata_port_operations jmicron_ops = {
 	.port_disable		= ata_port_disable,

 	/* Task file is PCI ATA format, use helpers */
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
 	.exec_command		= ata_exec_command,
 	.dev_select		= ata_std_dev_select,

 	.freeze			= ata_bmdma_freeze,
 	.thaw			= ata_bmdma_thaw,
 	.error_handler		= jmicron_error_handler,
 	.post_internal_cmd	= ata_bmdma_post_internal_cmd,

 	/* BMDMA handling is PCI ATA format, use helpers */
 	.bmdma_setup		= ata_bmdma_setup,
 	.bmdma_start		= ata_bmdma_start,
 	.bmdma_stop		= ata_bmdma_stop,
 	.bmdma_status		= ata_bmdma_status,
 	.qc_prep		= ata_qc_prep,
 	.qc_issue		= ata_qc_issue_prot,
 	.data_xfer		= ata_pio_data_xfer,

 	/* Timeout handling. Special recovery hooks here */
 	.eng_timeout		= ata_eng_timeout,
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,

 	/* Generic PATA PCI ATA helpers */
 	.port_start		= ata_port_start,
 	.port_stop		= ata_port_stop,
 	.host_stop		= ata_host_stop,
 };


 /**
  *	jmicron_init_one - Register Jmicron ATA PCI device with kernel services
  *	@pdev: PCI device to register
  *	@ent: Entry in jmicron_pci_tbl matching with @pdev
  *
  *	Called from kernel PCI layer.
  *
  *	LOCKING:
  *	Inherited from PCI layer (may sleep).
  *
  *	RETURNS:
  *	Zero on success, or -ERRNO value.
  */

 static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 {
 	static struct ata_port_info info = {
 		.sht		= &jmicron_sht,
 		.flags	= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,

 		.pio_mask	= 0x1f,
 		.mwdma_mask	= 0x07,
 		.udma_mask 	= 0x3f,

 		.port_ops	= &jmicron_ops,
 	};
 	struct ata_port_info *port_info[2] = { &info, &info };

 	u32 reg;

 	if (id->driver_data != 368) {
 		/* Put the controller into AHCI mode in case the AHCI driver
 		   has not yet been loaded. This can be done with either
 		   function present */

 		/* FIXME: We may want a way to override this in future */
 		pci_write_config_byte(pdev, 0x41, 0xa1);
 	}

 	/* PATA controller is fn 1, AHCI is fn 0 */
 	if (PCI_FUNC(pdev->devfn) != 1)
 		return -ENODEV;

 	if ( id->driver_data == 365 || id->driver_data == 366) {
 		/* The 365/66 have two PATA channels, redirect the second */
 		pci_read_config_dword(pdev, 0x80, &reg);
 		reg |= (1 << 24);	/* IDE1 to PATA IDE secondary */
 		pci_write_config_dword(pdev, 0x80, reg);
 	}

 	return ata_pci_init_one(pdev, port_info, 2);
 }

 static const struct pci_device_id jmicron_pci_tbl[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 361},
 	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 363},
 	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 365},
 	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 366},
 	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 368},
 	{ }	/* terminate list */
 };

 static struct pci_driver jmicron_pci_driver = {
 	.name			= DRV_NAME,
 	.id_table		= jmicron_pci_tbl,
 	.probe			= jmicron_init_one,
 	.remove			= ata_pci_remove_one,
 };

 static int __init jmicron_init(void)
 {
 	return pci_register_driver(&jmicron_pci_driver);
 }

 static void __exit jmicron_exit(void)
 {
 	pci_unregister_driver(&jmicron_pci_driver);
 }

 module_init(jmicron_init);
 module_exit(jmicron_exit);

 MODULE_AUTHOR("Alan Cox");
 MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");
 MODULE_LICENSE("GPL");
 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
 MODULE_VERSION(DRV_VERSION);
	/*
	* pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the
	* PATA port of the controller. The SATA ports are
	* driven by AHCI in the usual configuration although
	* this driver can handle other setups if we need it.
	*
	* (c) 2006 Red Hat <alan@redhat.com>
	*/

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

	#define DRV_NAME "pata_jmicron"
	#define DRV_VERSION "0.1.2"

	typedef enum {
	PORT_PATA0 = 0,
	PORT_PATA1 = 1,
	PORT_SATA = 2,
	} port_type;

	/**
	* jmicron_pre_reset - check for 40/80 pin
	* @ap: Port
	*
	* Perform the PATA port setup we need.

	* On the Jmicron 361/363 there is a single PATA port that can be mapped
	* either as primary or secondary (or neither). We don't do any policy
	* and setup here. We assume that has been done by init_one and the
	* BIOS.
	*/

	static int jmicron_pre_reset(struct ata_port *ap)
	{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	u32 control;
	u32 control5;
	int port_mask = 1<< (4 * ap->port_no);
	int port = ap->port_no;
	port_type port_map[2];

	/* Check if our port is enabled */
	pci_read_config_dword(pdev, 0x40, &control);
	if ((control & port_mask) == 0)
	return 0;

	/* There are two basic mappings. One has the two SATA ports merged
	as master/slave and the secondary as PATA, the other has only the
	SATA port mapped */
	if (control & (1 << 23)) {
	port_map[0] = PORT_SATA;
	port_map[1] = PORT_PATA0;
	} else {
	port_map[0] = PORT_SATA;
	port_map[1] = PORT_SATA;
	}

	/* The 365/366 may have this bit set to map the second PATA port
	as the internal primary channel */
	pci_read_config_dword(pdev, 0x80, &control5);
	if (control5 & (1<<24))
	port_map[0] = PORT_PATA1;

	/* The two ports may then be logically swapped by the firmware */
	if (control & (1 << 22))
	port = port ^ 1;

	/*
	* Now we know which physical port we are talking about we can
	* actually do our cable checking etc. Thankfully we don't need
	* to do the plumbing for other cases.
	*/
	switch (port_map[port])
	{
	case PORT_PATA0:
	if (control & (1 << 5))
	return 0;
	if (control & (1 << 3)) /* 40/80 pin primary */
	ap->cbl = ATA_CBL_PATA40;
	else
	ap->cbl = ATA_CBL_PATA80;
	break;
	case PORT_PATA1:
	/* Bit 21 is set if the port is enabled */
	if ((control5 & (1 << 21)) == 0)
	return 0;
	if (control5 & (1 << 19)) /* 40/80 pin secondary */
	ap->cbl = ATA_CBL_PATA40;
	else
	ap->cbl = ATA_CBL_PATA80;
	break;
	case PORT_SATA:
	ap->cbl = ATA_CBL_SATA;
	break;
	}
	return ata_std_prereset(ap);
	}

	/**
	* jmicron_error_handler - Setup and error handler
	* @ap: Port to handle
	*
	* LOCKING:
	* None (inherited from caller).
	*/

	static void jmicron_error_handler(struct ata_port *ap)
	{
	return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
	}

	/* No PIO or DMA methods needed for this device */

	static struct scsi_host_template jmicron_sht = {
	.module = THIS_MODULE,
	.name = DRV_NAME,
	.ioctl = ata_scsi_ioctl,
	.queuecommand = ata_scsi_queuecmd,
	.can_queue = ATA_DEF_QUEUE,
	.this_id = ATA_SHT_THIS_ID,
	.sg_tablesize = LIBATA_MAX_PRD,
	/* Special handling needed if you have sector or LBA48 limits */
	.max_sectors = ATA_MAX_SECTORS,
	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	.emulated = ATA_SHT_EMULATED,
	.use_clustering = ATA_SHT_USE_CLUSTERING,
	.proc_name = DRV_NAME,
	.dma_boundary = ATA_DMA_BOUNDARY,
	.slave_configure = ata_scsi_slave_config,
	/* Use standard CHS mapping rules */
	.bios_param = ata_std_bios_param,
	};

	static const struct ata_port_operations jmicron_ops = {
	.port_disable = ata_port_disable,

	/* Task file is PCI ATA format, use helpers */
	.tf_load = ata_tf_load,
	.tf_read = ata_tf_read,
	.check_status = ata_check_status,
	.exec_command = ata_exec_command,
	.dev_select = ata_std_dev_select,

	.freeze = ata_bmdma_freeze,
	.thaw = ata_bmdma_thaw,
	.error_handler = jmicron_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,

	/* BMDMA handling is PCI ATA format, use helpers */
	.bmdma_setup = ata_bmdma_setup,
	.bmdma_start = ata_bmdma_start,
	.bmdma_stop = ata_bmdma_stop,
	.bmdma_status = ata_bmdma_status,
	.qc_prep = ata_qc_prep,
	.qc_issue = ata_qc_issue_prot,
	.data_xfer = ata_pio_data_xfer,

	/* Timeout handling. Special recovery hooks here */
	.eng_timeout = ata_eng_timeout,
	.irq_handler = ata_interrupt,
	.irq_clear = ata_bmdma_irq_clear,

	/* Generic PATA PCI ATA helpers */
	.port_start = ata_port_start,
	.port_stop = ata_port_stop,
	.host_stop = ata_host_stop,
	};


	/**
	* jmicron_init_one - Register Jmicron ATA PCI device with kernel services
	* @pdev: PCI device to register
	* @ent: Entry in jmicron_pci_tbl matching with @pdev
	*
	* Called from kernel PCI layer.
	*
	* LOCKING:
	* Inherited from PCI layer (may sleep).
	*
	* RETURNS:
	* Zero on success, or -ERRNO value.
	*/

	static int jmicron_init_one (struct pci_dev pdev, const struct pci_device_id id)
	{
	static struct ata_port_info info = {
	.sht = &jmicron_sht,
	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,

	.pio_mask = 0x1f,
	.mwdma_mask = 0x07,
	.udma_mask = 0x3f,

	.port_ops = &jmicron_ops,
	};
	struct ata_port_info *port_info[2] = { &info, &info };

	u32 reg;

	if (id->driver_data != 368) {
	/* Put the controller into AHCI mode in case the AHCI driver
	has not yet been loaded. This can be done with either
	function present */

	/* FIXME: We may want a way to override this in future */
	pci_write_config_byte(pdev, 0x41, 0xa1);
	}

	/* PATA controller is fn 1, AHCI is fn 0 */
	if (PCI_FUNC(pdev->devfn) != 1)
	return -ENODEV;

	if ( id->driver_data == 365 \|\| id->driver_data == 366) {
	/* The 365/66 have two PATA channels, redirect the second */
	pci_read_config_dword(pdev, 0x80, &reg);
	reg \|= (1 << 24); /* IDE1 to PATA IDE secondary */
	pci_write_config_dword(pdev, 0x80, reg);
	}

	return ata_pci_init_one(pdev, port_info, 2);
	}

	static const struct pci_device_id jmicron_pci_tbl[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 361},
	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 363},
	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 365},
	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 366},
	{ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 368},
	{ } /* terminate list */
	};

	static struct pci_driver jmicron_pci_driver = {
	.name = DRV_NAME,
	.id_table = jmicron_pci_tbl,
	.probe = jmicron_init_one,
	.remove = ata_pci_remove_one,
	};

	static int __init jmicron_init(void)
	{
	return pci_register_driver(&jmicron_pci_driver);
	}

	static void __exit jmicron_exit(void)
	{
	pci_unregister_driver(&jmicron_pci_driver);
	}

	module_init(jmicron_init);
	module_exit(jmicron_exit);

	MODULE_AUTHOR("Alan Cox");
	MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");
	MODULE_LICENSE("GPL");
	MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
	MODULE_VERSION(DRV_VERSION);