path: root/drivers/ata/sata_sil24.c

/*
 * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers
 *
 * Copyright 2005  Tejun Heo
 *
 * Based on preview driver from Silicon Image.
 *
 * 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.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <linux/libata.h>

#define DRV_NAME	"sata_sil24"
#define DRV_VERSION	"0.8"

/*
 * Port request block (PRB) 32 bytes
 */
struct sil24_prb {
	__le16	ctrl;
	__le16	prot;
	__le32	rx_cnt;
	u8	fis[6 * 4];
};

/*
 * Scatter gather entry (SGE) 16 bytes
 */
struct sil24_sge {
	__le64	addr;
	__le32	cnt;
	__le32	flags;
};

/*
 * Port multiplier
 */
struct sil24_port_multiplier {
	__le32	diag;
	__le32	sactive;
};

enum {
	SIL24_HOST_BAR		= 0,
	SIL24_PORT_BAR		= 2,

	/*
	 * Global controller registers (128 bytes @ BAR0)
	 */
		/* 32 bit regs */
	HOST_SLOT_STAT		= 0x00, /* 32 bit slot stat * 4 */
	HOST_CTRL		= 0x40,
	HOST_IRQ_STAT		= 0x44,
	HOST_PHY_CFG		= 0x48,
	HOST_BIST_CTRL		= 0x50,
	HOST_BIST_PTRN		= 0x54,
	HOST_BIST_STAT		= 0x58,
	HOST_MEM_BIST_STAT	= 0x5c,
	HOST_FLASH_CMD		= 0x70,
		/* 8 bit regs */
	HOST_FLASH_DATA		= 0x74,
	HOST_TRANSITION_DETECT	= 0x75,
	HOST_GPIO_CTRL		= 0x76,
	HOST_I2C_ADDR		= 0x78, /* 32 bit */
	HOST_I2C_DATA		= 0x7c,
	HOST_I2C_XFER_CNT	= 0x7e,
	HOST_I2C_CTRL		= 0x7f,

	/* HOST_SLOT_STAT bits */
	HOST_SSTAT_ATTN		= (1 << 31),

	/* HOST_CTRL bits */
	HOST_CTRL_M66EN		= (1 << 16), /* M66EN PCI bus signal */
	HOST_CTRL_TRDY		= (1 << 17), /* latched PCI TRDY */
	HOST_CTRL_STOP		= (1 << 18), /* latched PCI STOP */
	HOST_CTRL_DEVSEL	= (1 << 19), /* latched PCI DEVSEL */
	HOST_CTRL_REQ64		= (1 << 20), /* latched PCI REQ64 */
	HOST_CTRL_GLOBAL_RST	= (1 << 31), /* global reset */

	/*
	 * Port registers
	 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2)
	 */
	PORT_REGS_SIZE		= 0x2000,

	PORT_LRAM		= 0x0000, /* 31 LRAM slots and PMP regs */
	PORT_LRAM_SLOT_SZ	= 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */

	PORT_PMP		= 0x0f80, /* 8 bytes PMP * 16 (128 bytes) */
	PORT_PMP_STATUS		= 0x0000, /* port device status offset */
	PORT_PMP_QACTIVE	= 0x0004, /* port device QActive offset */
	PORT_PMP_SIZE		= 0x0008, /* 8 bytes per PMP */

		/* 32 bit regs */
	PORT_CTRL_STAT		= 0x1000, /* write: ctrl-set, read: stat */
	PORT_CTRL_CLR		= 0x1004, /* write: ctrl-clear */
	PORT_IRQ_STAT		= 0x1008, /* high: status, low: interrupt */
	PORT_IRQ_ENABLE_SET	= 0x1010, /* write: enable-set */
	PORT_IRQ_ENABLE_CLR	= 0x1014, /* write: enable-clear */
	PORT_ACTIVATE_UPPER_ADDR= 0x101c,
	PORT_EXEC_FIFO		= 0x1020, /* command execution fifo */
	PORT_CMD_ERR		= 0x1024, /* command error number */
	PORT_FIS_CFG		= 0x1028,
	PORT_FIFO_THRES		= 0x102c,
		/* 16 bit regs */
	PORT_DECODE_ERR_CNT	= 0x1040,
	PORT_DECODE_ERR_THRESH	= 0x1042,
	PORT_CRC_ERR_CNT	= 0x1044,
	PORT_CRC_ERR_THRESH	= 0x1046,
	PORT_HSHK_ERR_CNT	= 0x1048,
	PORT_HSHK_ERR_THRESH	= 0x104a,
		/* 32 bit regs */
	PORT_PHY_CFG		= 0x1050,
	PORT_SLOT_STAT		= 0x1800,
	PORT_CMD_ACTIVATE	= 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */
	PORT_CONTEXT		= 0x1e04,
	PORT_EXEC_DIAG		= 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */
	PORT_