ata_piix.c

linux 内核源代码

/*
 *    ata_piix.c - Intel PATA/SATA controllers
 *
 *    Maintained by:  Jeff Garzik <[e-mail]>
 *    		    Please ALWAYS copy [e-mail]
 *		    on emails.
 *
 *
 *	Copyright 2003-2005 Red Hat Inc
 *	Copyright 2003-2005 Jeff Garzik
 *
 *
 *	Copyright header from piix.c:
 *
 *  Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
 *  Copyright (C) 1998-2000 Andre Hedrick <[e-mail]>
 *  Copyright (C) 2003 Red Hat Inc <[e-mail]>
 *
 *
 *  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 documentation available at http://developer.intel.com/
 *
 * Documentation
 *	Publically available from Intel web site. Errata documentation
 * is also publically available. As an aide to anyone hacking on this
 * driver the list of errata that are relevant is below, going back to
 * PIIX4. Older device documentation is now a bit tricky to find.
 *
 * The chipsets all follow very much the same design. The orginal Triton
 * series chipsets do _not_ support independant device timings, but this
 * is fixed in Triton II. With the odd mobile exception the chips then
 * change little except in gaining more modes until SATA arrives. This
 * driver supports only the chips with independant timing (that is those
 * with SITRE and the 0x44 timing register). See pata_oldpiix and pata_mpiix
 * for the early chip drivers.
 *
 * Errata of note:
 *
 * Unfixable
 *	PIIX4    errata #9	- Only on ultra obscure hw
 *	ICH3	 errata #13     - Not observed to affect real hw
 *				  by Intel
 *
 * Things we must deal with
 *	PIIX4	errata #10	- BM IDE hang with non UDMA
 *				  (must stop/start dma to recover)
 *	440MX   errata #15	- As PIIX4 errata #10
 *	PIIX4	errata #15	- Must not read control registers
 * 				  during a PIO transfer
 *	440MX   errata #13	- As PIIX4 errata #15
 *	ICH2	errata #21	- DMA mode 0 doesn't work right
 *	ICH0/1  errata #55	- As ICH2 errata #21
 *	ICH2	spec c #9	- Extra operations needed to handle
 *				  drive hotswap [NOT YET SUPPORTED]
 *	ICH2    spec c #20	- IDE PRD must not cross a 64K boundary
 *				  and must be dword aligned
 *	ICH2    spec c #24	- UDMA mode 4,5 t85/86 should be 6ns not 3.3
 *
 * Should have been BIOS fixed:
 *	450NX:	errata #19	- DMA hangs on old 450NX
 *	450NX:  errata #20	- DMA hangs on old 450NX
 *	450NX:  errata #25	- Corruption with DMA on old 450NX
 *	ICH3    errata #15      - IDE deadlock under high load
 *				  (BIOS must set dev 31 fn 0 bit 23)
 *	ICH3	errata #18	- Don't use native mode
 */

#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/dmi.h>

#define DRV_NAME	"ata_piix"
#define DRV_VERSION	"2.12"

enum {
	PIIX_IOCFG		= 0x54, /* IDE I/O configuration register */
	ICH5_PMR		= 0x90, /* port mapping register */
	ICH5_PCS		= 0x92,	/* port control and status */
	PIIX_SCC		= 0x0A, /* sub-class code register */

	PIIX_FLAG_SCR		= (1 << 26), /* SCR available */
	PIIX_FLAG_AHCI		= (1 << 27), /* AHCI possible */
	PIIX_FLAG_CHECKINTR	= (1 << 28), /* make sure PCI INTx enabled */

	PIIX_PATA_FLAGS		= ATA_FLAG_SLAVE_POSS,
	PIIX_SATA_FLAGS		= ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR,

	/* combined mode.  if set, PATA is channel 0.
	 * if clear, PATA is channel 1.
	 */
	PIIX_PORT_ENABLED	= (1 << 0),
	PIIX_PORT_PRESENT	= (1 << 4),

	PIIX_80C_PRI		= (1 << 5) | (1 << 4),
	PIIX_80C_SEC		= (1 << 7) | (1 << 6),

	/* controller IDs */
	piix_pata_mwdma		= 0,	/* PIIX3 MWDMA only */
	piix_pata_33,			/* PIIX4 at 33Mhz */
	ich_pata_33,			/* ICH up to UDMA 33 only */
	ich_pata_66,			/* ICH up to 66 Mhz */
	ich_pata_100,			/* ICH up to UDMA 100 */
	ich5_sata,
	ich6_sata,
	ich6_sata_ahci,
	ich6m_sata_ahci,
	ich8_sata_ahci,
	ich8_2port_sata,
	ich8m_apple_sata_ahci,		/* locks up on second port enable */
	tolapai_sata_ahci,
	piix_pata_vmw,			/* PIIX4 for VMware, spurious DMA_ERR */

	/* constants for mapping table */
	P0			= 0,  /* port 0 */
	P1			= 1,  /* port 1 */
	P2			= 2,  /* port 2 */
	P3			= 3,  /* port 3 */
	IDE			= -1, /* IDE */
	NA			= -2, /* not avaliable */
	RV			= -3, /* reserved */

	PIIX_AHCI_DEVICE	= 6,

	/* host->flags bits */
	PIIX_HOST_BROKEN_SUSPEND = (1 << 24),
};

struct piix_map_db {
	const u32 mask;
	const u16 port_enable;
	const int map[][4];
};

struct piix_host_priv {
	const int *map;
};

static int piix_init_one(struct pci_dev *pdev,
			 const struct pci_device_id *ent);
static void piix_pata_error_handler(struct ata_port *ap);
static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev);
static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev);
static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev);
static int ich_pata_cable_detect(struct ata_port *ap);
static u8 piix_vmw_bmdma_status(struct ata_port *ap);
#ifdef CONFIG_PM
static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
static int piix_pci_device_resume(struct pci_dev *pdev);
#endif

static unsigned int in_module_init = 1;

static const struct pci_device_id piix_pci_tbl[] = {
	/* Intel PIIX3 for the 430HX etc */
	{ 0x8086, 0x7010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_mwdma },
	/* VMware ICH4 */
	{ 0x8086, 0x7111, 0x15ad, 0x1976, 0, 0, piix_pata_vmw },
	/* Intel PIIX4 for the 430TX/440BX/MX chipset: UDMA 33 */
	/* Also PIIX4E (fn3 rev 2) and PIIX4M (fn3 rev 3) */
	{ 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
	/* Intel PIIX4 */
	{ 0x8086, 0x7199, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
	/* Intel PIIX4 */
	{ 0x8086, 0x7601, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
	/* Intel PIIX */
	{ 0x8086, 0x84CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
	/* Intel ICH (i810, i815, i840) UDMA 66*/
	{ 0x8086, 0x2411, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_66 },
	/* Intel ICH0 : UDMA 33*/
	{ 0x8086, 0x2421, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_33 },
	/* Intel ICH2M */
	{ 0x8086, 0x244A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/* Intel ICH2 (i810E2, i845, 850, 860) UDMA 100 */
	{ 0x8086, 0x244B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/*  Intel ICH3M */
	{ 0x8086, 0x248A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/* Intel ICH3 (E7500/1) UDMA 100 */
	{ 0x8086, 0x248B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/* Intel ICH4 (i845GV, i845E, i852, i855) UDMA 100 */
	{ 0x8086, 0x24CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	{ 0x8086, 0x24CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/* Intel ICH5 */
	{ 0x8086, 0x24DB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/* C-ICH (i810E2) */
	{ 0x8086, 0x245B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/* ESB (855GME/875P + 6300ESB) UDMA 100  */
	{ 0x8086, 0x25A2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/* ICH6 (and 6) (i915) UDMA 100 */
	{ 0x8086, 0x266F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/* ICH7/7-R (i945, i975) UDMA 100*/
	{ 0x8086, 0x27DF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	{ 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
	/* ICH8 Mobile PATA Controller */
	{ 0x8086, 0x2850, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },

	/* NOTE: The following PCI ids must be kept in sync with the
	 * list in drivers/pci/quirks.c.
	 */

	/* 82801EB (ICH5) */
	{ 0x8086, 0x24d1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
	/* 82801EB (ICH5) */
	{ 0x8086, 0x24df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
	/* 6300ESB (ICH5 variant with broken PCS present bits) */
	{ 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
	/* 6300ESB pretending RAID */
	{ 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
	/* 82801FB/FW (ICH6/ICH6W) */
	{ 0x8086, 0x2651, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
	/* 82801FR/FRW (ICH6R/ICH6RW) */
	{ 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },
	/* 82801FBM ICH6M (ICH6R with only port 0 and 2 implemented) */
	{ 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata_ahci },
	/* 82801GB/GR/GH (ICH7, identical to ICH6) */
	{ 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },
	/* 2801GBM/GHM (ICH7M, identical to ICH6M) */
	{ 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata_ahci },
	/* Enterprise Southbridge 2 (631xESB/632xESB) */
	{ 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },
	/* SATA Controller 1 IDE (ICH8) */
	{ 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
	/* SATA Controller 2 IDE (ICH8) */
	{ 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
	/* Mobile SATA Controller IDE (ICH8M) */
	{ 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
	/* Mobile SATA Controller IDE (ICH8M), Apple */
	{ 0x8086, 0x2828, 0x106b, 0x00a0, 0, 0, ich8m_apple_sata_ahci },
	/* SATA Controller IDE (ICH9) */
	{ 0x8086, 0x2920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
	/* SATA Controller IDE (ICH9) */
	{ 0x8086, 0x2921, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
	/* SATA Controller IDE (ICH9) */
	{ 0x8086, 0x2926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
	/* SATA Controller IDE (ICH9M) */
	{ 0x8086, 0x2928, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
	/* SATA Controller IDE (ICH9M) */
	{ 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
	/* SATA Controller IDE (ICH9M) */
	{ 0x8086, 0x292e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
	/* SATA Controller IDE (Tolapai) */
	{ 0x8086, 0x5028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, tolapai_sata_ahci },

	{ }	/* terminate list */
};

static struct pci_driver piix_pci_driver = {
	.name			= DRV_NAME,
	.id_table		= piix_pci_tbl,
	.probe			= piix_init_one,
	.remove			= ata_pci_remove_one,
#ifdef CONFIG_PM
	.suspend		= piix_pci_device_suspend,
	.resume			= piix_pci_device_resume,
#endif
};

static struct scsi_host_template piix_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,
	.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,
	.slave_destroy		= ata_scsi_slave_destroy,
	.bios_param		= ata_std_bios_param,
};

static const struct ata_port_operations piix_pata_ops = {
	.set_piomode		= piix_set_piomode,
	.set_dmamode		= piix_set_dmamode,
	.mode_filter		= ata_pci_default_filter,

	.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,

	.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_data_xfer,

	.freeze			= ata_bmdma_freeze,
	.thaw			= ata_bmdma_thaw,
	.error_handler		= piix_pata_error_handler,
	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
	.cable_detect		= ata_cable_40wire,

	.irq_handler		= ata_interrupt,
	.irq_clear		= ata_bmdma_irq_clear,
	.irq_on			= ata_irq_on,

	.port_start		= ata_port_start,
};

static const struct ata_port_operations ich_pata_ops = {
	.set_piomode		= piix_set_piomode,
	.set_dmamode		= ich_set_dmamode,
	.mode_filter		= ata_pci_default_filter,

	.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,

	.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_data_xfer,

	.freeze			= ata_bmdma_freeze,
	.thaw			= ata_bmdma_thaw,
	.error_handler		= piix_pata_error_handler,
	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
	.cable_detect		= ich_pata_cable_detect,

	.irq_handler		= ata_interrupt,
	.irq_clear		= ata_bmdma_irq_clear,
	.irq_on			= ata_irq_on,

	.port_start		= ata_port_start,
};

static const struct ata_port_operations piix_sata_ops = {
	.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,

	.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_data_xfer,

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

	.irq_handler		= ata_interrupt,
	.irq_clear		= ata_bmdma_irq_clear,
	.irq_on			= ata_irq_on,

	.port_start		= ata_port_start,
};

static const struct ata_port_operations piix_vmw_ops = {
	.set_piomode		= piix_set_piomode,
	.set_dmamode		= piix_set_dmamode,
	.mode_filter		= ata_pci_default_filter,

	.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,

	.bmdma_setup		= ata_bmdma_setup,
	.bmdma_start		= ata_bmdma_start,
	.bmdma_stop		= ata_bmdma_stop,
	.bmdma_status		= piix_vmw_bmdma_status,
	.qc_prep		= ata_qc_prep,
	.qc_issue		= ata_qc_issue_prot,
	.data_xfer		= ata_data_xfer,

	.freeze			= ata_bmdma_freeze,
	.thaw			= ata_bmdma_thaw,
	.error_handler		= piix_pata_error_handler,
	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
	.cable_detect		= ata_cable_40wire,

	.irq_handler		= ata_interrupt,
	.irq_clear		= ata_bmdma_irq_clear,
	.irq_on			= ata_irq_on,

	.port_start		= ata_port_start,
};

static const struct piix_map_db ich5_map_db = {
	.mask = 0x7,
	.port_enable = 0x3,
	.map = {
		/* PM   PS   SM   SS       MAP  */
		{  P0,  NA,  P1,  NA }, /* 000b */
		{  P1,  NA,  P0,  NA }, /* 001b */
		{  RV,  RV,  RV,  RV },
		{  RV,  RV,  RV,  RV },
		{  P0,  P1, IDE, IDE }, /* 100b */
		{  P1,  P0, IDE, IDE }, /* 101b */
		{ IDE, IDE,  P0,  P1 }, /* 110b */
		{ IDE, IDE,  P1,  P0 }, /* 111b */
	},
};

static const struct piix_map_db ich6_map_db = {
	.mask = 0x3,
	.port_enable = 0xf,
	.map = {
		/* PM   PS   SM   SS       MAP */
		{  P0,  P2,  P1,  P3 }, /* 00b */
		{ IDE, IDE,  P1,  P3 }, /* 01b */
		{  P0,  P2, IDE, IDE }, /* 10b */
		{  RV,  RV,  RV,  RV },
	},
};

static const struct piix_map_db ich6m_map_db = {
	.mask = 0x3,
	.port_enable = 0x5,

	/* Map 01b isn't specified in the doc but some notebooks use
	 * it anyway.  MAP 01b have been spotted on both ICH6M and
	 * ICH7M.
	 */
	.map = {
		/* PM   PS   SM   SS       MAP */
		{  P0,  P2,  NA,  NA }, /* 00b */
		{ IDE, IDE,  P1,  P3 }, /* 01b */
		{  P0,  P2, IDE, IDE }, /* 10b */
		{  RV,  RV,  RV,  RV },
	},
};

static const struct piix_map_db ich8_map_db = {
	.mask = 0x3,
	.port_enable = 0xf,
	.map = {
		/* PM   PS   SM   SS       MAP */
		{  P0,  P2,  P1,  P3 }, /* 00b (hardwired when in AHCI) */
		{  RV,  RV,  RV,  RV },
		{  P0,  P2, IDE, IDE }, /* 10b (IDE mode) */
		{  RV,  RV,  RV,  RV },
	},
};

static const struct piix_map_db ich8_2port_map_db = {
	.mask = 0x3,
	.port_enable = 0x3,
	.map = {
		/* PM   PS   SM   SS       MAP */
		{  P0,  NA,  P1,  NA }, /* 00b */
		{  RV,  RV,  RV,  RV }, /* 01b */
		{  RV,  RV,  RV,  RV }, /* 10b */
		{  RV,  RV,  RV,  RV },
	},