path: root/drivers/ata/sata_promise.c

/*
 *  sata_promise.c - Promise SATA
 *
 *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
 *  		    Please ALWAYS copy linux-ide@vger.kernel.org
 *		    on emails.
 *
 *  Copyright 2003-2004 Red Hat, Inc.
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 *  libata documentation is available via 'make {ps|pdf}docs',
 *  as Documentation/DocBook/libata.*
 *
 *  Hardware information only available under NDA.
 *
 */

#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/interrupt.h>
#include <linux/device.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <linux/libata.h>
#include "sata_promise.h"

#define DRV_NAME	"sata_promise"
#define DRV_VERSION	"1.05"


enum {
	PDC_MMIO_BAR		= 3,

	/* register offsets */
	PDC_FEATURE		= 0x04, /* Feature/Error reg (per port) */
	PDC_SECTOR_COUNT	= 0x08, /* Sector count reg (per port) */
	PDC_SECTOR_NUMBER	= 0x0C, /* Sector number reg (per port) */
	PDC_CYLINDER_LOW	= 0x10, /* Cylinder low reg (per port) */
	PDC_CYLINDER_HIGH	= 0x14, /* Cylinder high reg (per port) */
	PDC_DEVICE		= 0x18, /* Device/Head reg (per port) */
	PDC_COMMAND		= 0x1C, /* Command/status reg (per port) */
	PDC_ALTSTATUS		= 0x38, /* Alternate-status/device-control reg (per port) */
	PDC_PKT_SUBMIT		= 0x40, /* Command packet pointer addr */
	PDC_INT_SEQMASK		= 0x40,	/* Mask of asserted SEQ INTs */
	PDC_FLASH_CTL		= 0x44, /* Flash control register */
	PDC_GLOBAL_CTL		= 0x48, /* Global control/status (per port) */
	PDC_CTLSTAT		= 0x60,	/* IDE control and status (per port) */
	PDC_SATA_PLUG_CSR	= 0x6C, /* SATA Plug control/status reg */
	PDC2_SATA_PLUG_CSR	= 0x60, /* SATAII Plug control/status reg */
	PDC_TBG_MODE		= 0x41C, /* TBG mode (not SATAII) */
	PDC_SLEW_CTL		= 0x470, /* slew rate control reg (not SATAII) */

	PDC_ERR_MASK		= (1<<19) | (1<<20) | (1<<21) | (1<<22) |
				  (1<<8) | (1<<9) | (1<<10),

	board_2037x		= 0,	/* FastTrak S150 TX2plus */
	board_20319		= 1,	/* FastTrak S150 TX4 */
	board_20619		= 2,	/* FastTrak TX4000 */
	board_2057x		= 3,	/* SATAII150 Tx2plus */
	board_40518		= 4,	/* SATAII150 Tx4 */

	PDC_HAS_PATA		= (1 << 1), /* PDC20375/20575 has PATA */

	/* Sequence counter control registers bit definitions */
	PDC_SEQCNTRL_INT_MASK	= (1 << 5), /* Sequence Interrupt Mask */

	/* Feature register values */
	PDC_FEATURE_ATAPI_PIO	= 0x00, /* ATAPI data xfer by PIO */
	PDC_FEATURE_ATAPI_DMA	= 0x01, /* ATAPI data xfer by DMA */

	/* Device/Head register values */
	PDC_DEVICE_SATA		= 0xE0, /* Device/Head value for SATA devices */

	/* PDC_CTLSTAT bit definitions */
	PDC_DMA_ENABLE		= (1 << 7),
	PDC_IRQ_DISABLE		= (1 << 10),
	PDC_RESET		= (1 << 11), /* HDMA reset */

	PDC_COMMON_FLAGS	= ATA_FLAG_NO_LEGACY |
				  ATA_FLAG_MMIO |
				  ATA_FLAG_PIO_POLLING,

	/* hp->flags bits */
	PDC_FLAG_GEN_II		= (1 << 0),
};


struct pdc_port_priv {
	u8			*pkt;
	dma_addr_t		pkt_dma;
};

struct pdc_host_priv {
	unsigned long		flags;
	unsigned long		port_flags[ATA_MAX_PORTS];
};

static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static irqreturn_t pdc_interrupt (int irq, void *dev_instance);
static void pdc_eng_timeout(struct ata_port *ap);
static int pdc_port_start(struct ata_port *ap);
static void pdc_pata_phy_reset(struct ata_port *ap);
static void pdc_qc_prep(struct ata_queued_cmd *qc);
static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
static int pdc_check_atapi_dma(struct ata_queued_cmd *qc);
static int pdc_old_check_atapi_dma(struct ata_queued_cmd *qc);
static void pdc_irq_clear(struct ata_port *ap);
static unsigned int pdc_qc_issue_prot(struct