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kernel_optimize_test/drivers/ata/ata_piix.c
Bartlomiej Zolnierkiewicz 6a94a746fb ata_piix: unify code for programming PIO and MWDMA timings 
Besides making things noticably simpler it results in ~2% decrease in
the driver LOC count and also ~2% decrease in the driver binary size
(as measured on x86-32).

Fix piix_set_piomode() documentation while at it.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2011-10-14 13:37:36 -04:00

1691 lines
46 KiB
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/*
* ata_piix.c - Intel PATA/SATA controllers
*
* Maintained by: Jeff Garzik <jgarzik@pobox.com>
* Please ALWAYS copy linux-ide@vger.kernel.org
* 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 <andre@linux-ide.org>
* Copyright (C) 2003 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 documentation available at http://developer.intel.com/
*
* Documentation
* Publicly available from Intel web site. Errata documentation
* is also publicly 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 original Triton
* series chipsets do _not_ support independent 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 independent 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
* ICH7 errata #16 - MWDMA1 timings are incorrect
*
* 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 <linux/gfp.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/dmi.h>
#define DRV_NAME "ata_piix"
#define DRV_VERSION "2.13"
enum {
PIIX_IOCFG = 0x54, /* IDE I/O configuration register */
ICH5_PMR = 0x90, /* port mapping register */
ICH5_PCS = 0x92, /* port control and status */
PIIX_SIDPR_BAR = 5,
PIIX_SIDPR_LEN = 16,
PIIX_SIDPR_IDX = 0,
PIIX_SIDPR_DATA = 4,
PIIX_FLAG_CHECKINTR = (1 << 28), /* make sure PCI INTx enabled */
PIIX_FLAG_SIDPR = (1 << 29), /* SATA idx/data pair regs */
PIIX_PATA_FLAGS = ATA_FLAG_SLAVE_POSS,
PIIX_SATA_FLAGS = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR,
PIIX_FLAG_PIO16 = (1 << 30), /*support 16bit PIO only*/
PIIX_80C_PRI = (1 << 5) | (1 << 4),
PIIX_80C_SEC = (1 << 7) | (1 << 6),
/* 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 available */
RV = -3, /* reserved */
PIIX_AHCI_DEVICE = 6,
/* host->flags bits */
PIIX_HOST_BROKEN_SUSPEND = (1 << 24),
};
enum piix_controller_ids {
/* controller IDs */
piix_pata_mwdma, /* 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 */
ich_pata_100_nomwdma1, /* ICH up to UDMA 100 but with no MWDMA1*/
ich5_sata,
ich6_sata,
ich6m_sata,
ich8_sata,
ich8_2port_sata,
ich8m_apple_sata, /* locks up on second port enable */
tolapai_sata,
piix_pata_vmw, /* PIIX4 for VMware, spurious DMA_ERR */
ich8_sata_snb,
};
struct piix_map_db {
const u32 mask;
const u16 port_enable;
const int map[][4];
};
struct piix_host_priv {
const int *map;
u32 saved_iocfg;
void __iomem *sidpr;
};
static int piix_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent);
static void piix_remove_one(struct pci_dev *pdev);
static int piix_pata_prereset(struct ata_link *link, unsigned long deadline);
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);
static int piix_sidpr_scr_read(struct ata_link *link,
unsigned int reg, u32 *val);
static int piix_sidpr_scr_write(struct ata_link *link,
unsigned int reg, u32 val);
static int piix_sidpr_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
unsigned hints);
static bool piix_irq_check(struct ata_port *ap);
static int piix_port_start(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-L */
{ 0x8086, 0x24C1, 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_nomwdma1 },
{ 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100_nomwdma1 },
/* ICH8 Mobile PATA Controller */
{ 0x8086, 0x2850, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
/* SATA ports */
/* 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 },
/* 82801FBM ICH6M (ICH6R with only port 0 and 2 implemented).
* Attach iff the controller is in IDE mode. */
{ 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_STORAGE_IDE << 8, 0xffff00, ich6m_sata },
/* 82801GB/GR/GH (ICH7, identical to ICH6) */
{ 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
/* 2801GBM/GHM (ICH7M, identical to ICH6M) */
{ 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata },
/* Enterprise Southbridge 2 (631xESB/632xESB) */
{ 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
/* SATA Controller 1 IDE (ICH8) */
{ 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
/* SATA Controller 2 IDE (ICH8) */
{ 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* Mobile SATA Controller IDE (ICH8M), Apple */
{ 0x8086, 0x2828, 0x106b, 0x00a0, 0, 0, ich8m_apple_sata },
{ 0x8086, 0x2828, 0x106b, 0x00a1, 0, 0, ich8m_apple_sata },
{ 0x8086, 0x2828, 0x106b, 0x00a3, 0, 0, ich8m_apple_sata },
/* Mobile SATA Controller IDE (ICH8M) */
{ 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
/* SATA Controller IDE (ICH9) */
{ 0x8086, 0x2920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
/* 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 },
/* SATA Controller IDE (Tolapai) */
{ 0x8086, 0x5028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, tolapai_sata },
/* SATA Controller IDE (ICH10) */
{ 0x8086, 0x3a00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
/* SATA Controller IDE (ICH10) */
{ 0x8086, 0x3a06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (ICH10) */
{ 0x8086, 0x3a20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
/* SATA Controller IDE (ICH10) */
{ 0x8086, 0x3a26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (PCH) */
{ 0x8086, 0x3b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
/* SATA Controller IDE (PCH) */
{ 0x8086, 0x3b21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (PCH) */
{ 0x8086, 0x3b26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (PCH) */
{ 0x8086, 0x3b28, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
/* SATA Controller IDE (PCH) */
{ 0x8086, 0x3b2d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (PCH) */
{ 0x8086, 0x3b2e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
/* SATA Controller IDE (CPT) */
{ 0x8086, 0x1c00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
/* SATA Controller IDE (CPT) */
{ 0x8086, 0x1c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
/* SATA Controller IDE (CPT) */
{ 0x8086, 0x1c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (CPT) */
{ 0x8086, 0x1c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (PBG) */
{ 0x8086, 0x1d00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
/* SATA Controller IDE (PBG) */
{ 0x8086, 0x1d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (Panther Point) */
{ 0x8086, 0x1e00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
/* SATA Controller IDE (Panther Point) */
{ 0x8086, 0x1e01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
/* SATA Controller IDE (Panther Point) */
{ 0x8086, 0x1e08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (Panther Point) */
{ 0x8086, 0x1e09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
{ } /* terminate list */
};
static struct pci_driver piix_pci_driver = {
.name = DRV_NAME,
.id_table = piix_pci_tbl,
.probe = piix_init_one,
.remove = piix_remove_one,
#ifdef CONFIG_PM
.suspend = piix_pci_device_suspend,
.resume = piix_pci_device_resume,
#endif
};
static struct scsi_host_template piix_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
static struct ata_port_operations piix_sata_ops = {
.inherits = &ata_bmdma32_port_ops,
.sff_irq_check = piix_irq_check,
.port_start = piix_port_start,
};
static struct ata_port_operations piix_pata_ops = {
.inherits = &piix_sata_ops,
.cable_detect = ata_cable_40wire,
.set_piomode = piix_set_piomode,
.set_dmamode = piix_set_dmamode,
.prereset = piix_pata_prereset,
};
static struct ata_port_operations piix_vmw_ops = {
.inherits = &piix_pata_ops,
.bmdma_status = piix_vmw_bmdma_status,
};
static struct ata_port_operations ich_pata_ops = {
.inherits = &piix_pata_ops,
.cable_detect = ich_pata_cable_detect,
.set_dmamode = ich_set_dmamode,
};
static struct device_attribute *piix_sidpr_shost_attrs[] = {
&dev_attr_link_power_management_policy,
NULL
};
static struct scsi_host_template piix_sidpr_sht = {
ATA_BMDMA_SHT(DRV_NAME),
.shost_attrs = piix_sidpr_shost_attrs,
};
static struct ata_port_operations piix_sidpr_sata_ops = {
.inherits = &piix_sata_ops,
.hardreset = sata_std_hardreset,
.scr_read = piix_sidpr_scr_read,
.scr_write = piix_sidpr_scr_write,
.set_lpm = piix_sidpr_set_lpm,
};
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 },
},
};
static const struct piix_map_db ich8m_apple_map_db = {
.mask = 0x3,
.port_enable = 0x1,
.map = {
/* PM PS SM SS MAP */
{ P0, NA, NA, NA }, /* 00b */
{ RV, RV, RV, RV },
{ P0, P2, IDE, IDE }, /* 10b */
{ RV, RV, RV, RV },
},
};
static const struct piix_map_db tolapai_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 },
},
};
static const struct piix_map_db *piix_map_db_table[] = {
[ich5_sata] = &ich5_map_db,
[ich6_sata] = &ich6_map_db,
[ich6m_sata] = &ich6m_map_db,
[ich8_sata] = &ich8_map_db,
[ich8_2port_sata] = &ich8_2port_map_db,
[ich8m_apple_sata] = &ich8m_apple_map_db,
[tolapai_sata] = &tolapai_map_db,
[ich8_sata_snb] = &ich8_map_db,
};
static struct ata_port_info piix_port_info[] = {
[piix_pata_mwdma] = /* PIIX3 MWDMA only */
{
.flags = PIIX_PATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
.port_ops = &piix_pata_ops,
},
[piix_pata_33] = /* PIIX4 at 33MHz */
{
.flags = PIIX_PATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
.udma_mask = ATA_UDMA2,
.port_ops = &piix_pata_ops,
},
[ich_pata_33] = /* ICH0 - ICH at 33Mhz*/
{
.flags = PIIX_PATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA12_ONLY, /* Check: maybe MWDMA0 is ok */
.udma_mask = ATA_UDMA2,
.port_ops = &ich_pata_ops,
},
[ich_pata_66] = /* ICH controllers up to 66MHz */
{
.flags = PIIX_PATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA12_ONLY, /* MWDMA0 is broken on chip */
.udma_mask = ATA_UDMA4,
.port_ops = &ich_pata_ops,
},
[ich_pata_100] =
{
.flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA12_ONLY,
.udma_mask = ATA_UDMA5,
.port_ops = &ich_pata_ops,
},
[ich_pata_100_nomwdma1] =
{
.flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2_ONLY,
.udma_mask = ATA_UDMA5,
.port_ops = &ich_pata_ops,
},
[ich5_sata] =
{
.flags = PIIX_SATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich6_sata] =
{
.flags = PIIX_SATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich6m_sata] =
{
.flags = PIIX_SATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich8_sata] =
{
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich8_2port_sata] =
{
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[tolapai_sata] =
{
.flags = PIIX_SATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich8m_apple_sata] =
{
.flags = PIIX_SATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[piix_pata_vmw] =
{
.flags = PIIX_PATA_FLAGS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
.udma_mask = ATA_UDMA2,
.port_ops = &piix_vmw_ops,
},
/*
* some Sandybridge chipsets have broken 32 mode up to now,
* see https://bugzilla.kernel.org/show_bug.cgi?id=40592
*/
[ich8_sata_snb] =
{
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR | PIIX_FLAG_PIO16,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
};
static struct pci_bits piix_enable_bits[] = {
{ 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */
{ 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */
};
MODULE_AUTHOR("Andre Hedrick, Alan Cox, Andrzej Krzysztofowicz, Jeff Garzik");
MODULE_DESCRIPTION("SCSI low-level driver for Intel PIIX/ICH ATA controllers");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
MODULE_VERSION(DRV_VERSION);
struct ich_laptop {
u16 device;
u16 subvendor;
u16 subdevice;
};
/*
* List of laptops that use short cables rather than 80 wire
*/
static const struct ich_laptop ich_laptop[] = {
/* devid, subvendor, subdev */
{ 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
{ 0x27DF, 0x1025, 0x0102 }, /* ICH7 on Acer 5602aWLMi */
{ 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */
{ 0x27DF, 0x1028, 0x02b0 }, /* ICH7 on unknown Dell */
{ 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
{ 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */
{ 0x27DF, 0x103C, 0x361a }, /* ICH7 on unknown HP */
{ 0x27DF, 0x1071, 0xD221 }, /* ICH7 on Hercules EC-900 */
{ 0x27DF, 0x152D, 0x0778 }, /* ICH7 on unknown Intel */
{ 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */
{ 0x24CA, 0x1025, 0x003d }, /* ICH4 on ACER TM290 */
{ 0x266F, 0x1025, 0x0066 }, /* ICH6 on ACER Aspire 1694WLMi */
{ 0x2653, 0x1043, 0x82D8 }, /* ICH6M on Asus Eee 701 */
{ 0x27df, 0x104d, 0x900e }, /* ICH7 on Sony TZ-90 */
/* end marker */
{ 0, }
};
static int piix_port_start(struct ata_port *ap)
{
if (!(ap->flags & PIIX_FLAG_PIO16))
ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
return ata_bmdma_port_start(ap);
}
/**
* ich_pata_cable_detect - Probe host controller cable detect info
* @ap: Port for which cable detect info is desired
*
* Read 80c cable indicator from ATA PCI device's PCI config
* register. This register is normally set by firmware (BIOS).
*
* LOCKING:
* None (inherited from caller).
*/
static int ich_pata_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
struct piix_host_priv *hpriv = ap->host->private_data;
const struct ich_laptop *lap = &ich_laptop[0];
u8 mask;
/* Check for specials - Acer Aspire 5602WLMi */
while (lap->device) {
if (lap->device == pdev->device &&
lap->subvendor == pdev->subsystem_vendor &&
lap->subdevice == pdev->subsystem_device)
return ATA_CBL_PATA40_SHORT;
lap++;
}
/* check BIOS cable detect results */
mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
if ((hpriv->saved_iocfg & mask) == 0)
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}
/**
* piix_pata_prereset - prereset for PATA host controller
* @link: Target link
* @deadline: deadline jiffies for the operation
*
* LOCKING:
* None (inherited from caller).
*/
static int piix_pata_prereset(struct ata_link *link, unsigned long deadline)
{
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
return -ENOENT;
return ata_sff_prereset(link, deadline);
}
static DEFINE_SPINLOCK(piix_lock);
static void piix_set_timings(struct ata_port *ap, struct ata_device *adev,
u8 pio)
{
struct pci_dev *dev = to_pci_dev(ap->host->dev);
unsigned long flags;
unsigned int is_slave = (adev->devno != 0);
unsigned int master_port= ap->port_no ? 0x42 : 0x40;
unsigned int slave_port = 0x44;
u16 master_data;
u8 slave_data;
u8 udma_enable;
int control = 0;
/*
* See Intel Document 298600-004 for the timing programing rules
* for ICH controllers.
*/
static const /* ISP RTC */
u8 timings[][2] = { { 0, 0 },
{ 0, 0 },
{ 1, 0 },
{ 2, 1 },
{ 2, 3 }, };
if (pio >= 2)
control |= 1; /* TIME1 enable */
if (ata_pio_need_iordy(adev))
control |= 2; /* IE enable */
/* Intel specifies that the PPE functionality is for disk only */
if (adev->class == ATA_DEV_ATA)
control |= 4; /* PPE enable */
/*
* If the drive MWDMA is faster than it can do PIO then
* we must force PIO into PIO0
*/
if (adev->pio_mode < XFER_PIO_0 + pio)
/* Enable DMA timing only */
control |= 8; /* PIO cycles in PIO0 */
spin_lock_irqsave(&piix_lock, flags);
/* PIO configuration clears DTE unconditionally. It will be
* programmed in set_dmamode which is guaranteed to be called
* after set_piomode if any DMA mode is available.
*/
pci_read_config_word(dev, master_port, &master_data);
if (is_slave) {
/* clear TIME1|IE1|PPE1|DTE1 */
master_data &= 0xff0f;
/* enable PPE1, IE1 and TIME1 as needed */
master_data |= (control << 4);
pci_read_config_byte(dev, slave_port, &slave_data);
slave_data &= (ap->port_no ? 0x0f : 0xf0);
/* Load the timing nibble for this slave */
slave_data |= ((timings[pio][0] << 2) | timings[pio][1])
<< (ap->port_no ? 4 : 0);
} else {
/* clear ISP|RCT|TIME0|IE0|PPE0|DTE0 */
master_data &= 0xccf0;
/* Enable PPE, IE and TIME as appropriate */
master_data |= control;
/* load ISP and RCT */
master_data |=
(timings[pio][0] << 12) |
(timings[pio][1] << 8);
}
/* Enable SITRE (separate slave timing register) */
master_data |= 0x4000;
pci_write_config_word(dev, master_port, master_data);
if (is_slave)
pci_write_config_byte(dev, slave_port, slave_data);
/* Ensure the UDMA bit is off - it will be turned back on if
UDMA is selected */
if (ap->udma_mask) {
pci_read_config_byte(dev, 0x48, &udma_enable);
udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
pci_write_config_byte(dev, 0x48, udma_enable);
}
spin_unlock_irqrestore(&piix_lock, flags);
}
/**
* piix_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Drive in question
*
* Set PIO mode for device, in host controller PCI config space.
*
* LOCKING:
* None (inherited from caller).
*/
static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
piix_set_timings(ap, adev, adev->pio_mode - XFER_PIO_0);
}
/**
* do_pata_set_dmamode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Drive in question
* @isich: set if the chip is an ICH device
*
* Set UDMA mode for device, in host controller PCI config space.
*
* LOCKING:
* None (inherited from caller).
*/
static void do_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev, int isich)
{
struct pci_dev *dev = to_pci_dev(ap->host->dev);
unsigned long flags;
u8 speed = adev->dma_mode;
int devid = adev->devno + 2 * ap->port_no;
u8 udma_enable = 0;
if (speed >= XFER_UDMA_0) {
unsigned int udma = speed - XFER_UDMA_0;
u16 udma_timing;
u16 ideconf;
int u_clock, u_speed;
spin_lock_irqsave(&piix_lock, flags);
pci_read_config_byte(dev, 0x48, &udma_enable);
/*
* UDMA is handled by a combination of clock switching and
* selection of dividers
*
* Handy rule: Odd modes are UDMATIMx 01, even are 02
* except UDMA0 which is 00
*/
u_speed = min(2 - (udma & 1), udma);
if (udma == 5)
u_clock = 0x1000; /* 100Mhz */
else if (udma > 2)
u_clock = 1; /* 66Mhz */
else
u_clock = 0; /* 33Mhz */
udma_enable |= (1 << devid);
/* Load the CT/RP selection */
pci_read_config_word(dev, 0x4A, &udma_timing);
udma_timing &= ~(3 << (4 * devid));
udma_timing |= u_speed << (4 * devid);
pci_write_config_word(dev, 0x4A, udma_timing);
if (isich) {
/* Select a 33/66/100Mhz clock */
pci_read_config_word(dev, 0x54, &ideconf);
ideconf &= ~(0x1001 << devid);
ideconf |= u_clock << devid;
/* For ICH or later we should set bit 10 for better
performance (WR_PingPong_En) */
pci_write_config_word(dev, 0x54, ideconf);
}
pci_write_config_byte(dev, 0x48, udma_enable);
spin_unlock_irqrestore(&piix_lock, flags);
} else {
/* MWDMA is driven by the PIO timings. */
unsigned int mwdma = speed - XFER_MW_DMA_0;
const unsigned int needed_pio[3] = {
XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
};
int pio = needed_pio[mwdma] - XFER_PIO_0;
/* XFER_PIO_0 is never used currently */
piix_set_timings(ap, adev, pio);
}
}
/**
* piix_set_dmamode - Initialize host controller PATA DMA timings
* @ap: Port whose timings we are configuring
* @adev: um
*
* Set MW/UDMA mode for device, in host controller PCI config space.
*
* LOCKING:
* None (inherited from caller).
*/
static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
do_pata_set_dmamode(ap, adev, 0);
}
/**
* ich_set_dmamode - Initialize host controller PATA DMA timings
* @ap: Port whose timings we are configuring
* @adev: um
*
* Set MW/UDMA mode for device, in host controller PCI config space.
*
* LOCKING:
* None (inherited from caller).
*/
static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
do_pata_set_dmamode(ap, adev, 1);
}
/*
* Serial ATA Index/Data Pair Superset Registers access
*
* Beginning from ICH8, there's a sane way to access SCRs using index
* and data register pair located at BAR5 which means that we have
* separate SCRs for master and slave. This is handled using libata
* slave_link facility.
*/
static const int piix_sidx_map[] = {
[SCR_STATUS] = 0,
[SCR_ERROR] = 2,
[SCR_CONTROL] = 1,
};
static void piix_sidpr_sel(struct ata_link *link, unsigned int reg)
{
struct ata_port *ap = link->ap;
struct piix_host_priv *hpriv = ap->host->private_data;
iowrite32(((ap->port_no * 2 + link->pmp) << 8) | piix_sidx_map[reg],
hpriv->sidpr + PIIX_SIDPR_IDX);
}
static int piix_sidpr_scr_read(struct ata_link *link,
unsigned int reg, u32 *val)
{
struct piix_host_priv *hpriv = link->ap->host->private_data;
if (reg >= ARRAY_SIZE(piix_sidx_map))
return -EINVAL;
piix_sidpr_sel(link, reg);
*val = ioread32(hpriv->sidpr + PIIX_SIDPR_DATA);
return 0;
}
static int piix_sidpr_scr_write(struct ata_link *link,
unsigned int reg, u32 val)
{
struct piix_host_priv *hpriv = link->ap->host->private_data;
if (reg >= ARRAY_SIZE(piix_sidx_map))
return -EINVAL;
piix_sidpr_sel(link, reg);
iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA);
return 0;
}
static int piix_sidpr_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
unsigned hints)
{
return sata_link_scr_lpm(link, policy, false);
}
static bool piix_irq_check(struct ata_port *ap)
{
if (unlikely(!ap->ioaddr.bmdma_addr))
return false;
return ap->ops->bmdma_status(ap) & ATA_DMA_INTR;
}
#ifdef CONFIG_PM
static int piix_broken_suspend(void)
{
static const struct dmi_system_id sysids[] = {
{
.ident = "TECRA M3",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M3"),
},
},
{
.ident = "TECRA M3",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M3"),
},
},
{
.ident = "TECRA M4",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M4"),
},
},
{
.ident = "TECRA M4",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M4"),
},
},
{
.ident = "TECRA M5",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
},
},
{
.ident = "TECRA M6",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M6"),
},
},
{
.ident = "TECRA M7",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M7"),
},
},
{
.ident = "TECRA A8",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A8"),
},
},
{
.ident = "Satellite R20",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R20"),
},
},
{
.ident = "Satellite R25",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R25"),
},
},
{
.ident = "Satellite U200",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U200"),
},
},
{
.ident = "Satellite U200",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U200"),
},
},
{
.ident = "Satellite Pro U200",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE PRO U200"),
},
},
{
.ident = "Satellite U205",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U205"),
},
},
{
.ident = "SATELLITE U205",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U205"),
},
},
{
.ident = "Portege M500",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
},
},
{
.ident = "VGN-BX297XP",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
DMI_MATCH(DMI_PRODUCT_NAME, "VGN-BX297XP"),
},
},
{ } /* terminate list */
};
static const char *oemstrs[] = {
"Tecra M3,",
};
int i;
if (dmi_check_system(sysids))
return 1;
for (i = 0; i < ARRAY_SIZE(oemstrs); i++)
if (dmi_find_device(DMI_DEV_TYPE_OEM_STRING, oemstrs[i], NULL))
return 1;
/* TECRA M4 sometimes forgets its identify and reports bogus
* DMI information. As the bogus information is a bit
* generic, match as many entries as possible. This manual
* matching is necessary because dmi_system_id.matches is
* limited to four entries.
*/
if (dmi_match(DMI_SYS_VENDOR, "TOSHIBA") &&
dmi_match(DMI_PRODUCT_NAME, "000000") &&
dmi_match(DMI_PRODUCT_VERSION, "000000") &&
dmi_match(DMI_PRODUCT_SERIAL, "000000") &&
dmi_match(DMI_BOARD_VENDOR, "TOSHIBA") &&
dmi_match(DMI_BOARD_NAME, "Portable PC") &&
dmi_match(DMI_BOARD_VERSION, "Version A0"))
return 1;
return 0;
}
static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
unsigned long flags;
int rc = 0;
rc = ata_host_suspend(host, mesg);
if (rc)
return rc;
/* Some braindamaged ACPI suspend implementations expect the
* controller to be awake on entry; otherwise, it burns cpu
* cycles and power trying to do something to the sleeping
* beauty.
*/
if (piix_broken_suspend() && (mesg.event & PM_EVENT_SLEEP)) {
pci_save_state(pdev);
/* mark its power state as "unknown", since we don't
* know if e.g. the BIOS will change its device state
* when we suspend.
*/
if (pdev->current_state == PCI_D0)
pdev->current_state = PCI_UNKNOWN;
/* tell resume that it's waking up from broken suspend */
spin_lock_irqsave(&host->lock, flags);
host->flags |= PIIX_HOST_BROKEN_SUSPEND;
spin_unlock_irqrestore(&host->lock, flags);
} else
ata_pci_device_do_suspend(pdev, mesg);
return 0;
}
static int piix_pci_device_resume(struct pci_dev *pdev)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
unsigned long flags;
int rc;
if (host->flags & PIIX_HOST_BROKEN_SUSPEND) {
spin_lock_irqsave(&host->lock, flags);
host->flags &= ~PIIX_HOST_BROKEN_SUSPEND;
spin_unlock_irqrestore(&host->lock, flags);
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
/* PCI device wasn't disabled during suspend. Use
* pci_reenable_device() to avoid affecting the enable
* count.
*/
rc = pci_reenable_device(pdev);
if (rc)
dev_err(&pdev->dev,
"failed to enable device after resume (%d)\n",
rc);
} else
rc = ata_pci_device_do_resume(pdev);
if (rc == 0)
ata_host_resume(host);
return rc;
}
#endif
static u8 piix_vmw_bmdma_status(struct ata_port *ap)
{
return ata_bmdma_status(ap) & ~ATA_DMA_ERR;
}
#define AHCI_PCI_BAR 5
#define AHCI_GLOBAL_CTL 0x04
#define AHCI_ENABLE (1 << 31)
static int piix_disable_ahci(struct pci_dev *pdev)
{
void __iomem *mmio;
u32 tmp;
int rc = 0;
/* BUG: pci_enable_device has not yet been called. This
* works because this device is usually set up by BIOS.
*/
if (!pci_resource_start(pdev, AHCI_PCI_BAR) ||
!pci_resource_len(pdev, AHCI_PCI_BAR))
return 0;
mmio = pci_iomap(pdev, AHCI_PCI_BAR, 64);
if (!mmio)
return -ENOMEM;
tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
if (tmp & AHCI_ENABLE) {
tmp &= ~AHCI_ENABLE;
iowrite32(tmp, mmio + AHCI_GLOBAL_CTL);
tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
if (tmp & AHCI_ENABLE)
rc = -EIO;
}
pci_iounmap(pdev, mmio);
return rc;
}
/**
* piix_check_450nx_errata - Check for problem 450NX setup
* @ata_dev: the PCI device to check
*
* Check for the present of 450NX errata #19 and errata #25. If
* they are found return an error code so we can turn off DMA
*/
static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev)
{
struct pci_dev *pdev = NULL;
u16 cfg;
int no_piix_dma = 0;
while ((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL) {
/* Look for 450NX PXB. Check for problem configurations
A PCI quirk checks bit 6 already */
pci_read_config_word(pdev, 0x41, &cfg);
/* Only on the original revision: IDE DMA can hang */
if (pdev->revision == 0x00)
no_piix_dma = 1;
/* On all revisions below 5 PXB bus lock must be disabled for IDE */
else if (cfg & (1<<14) && pdev->revision < 5)
no_piix_dma = 2;
}
if (no_piix_dma)
dev_warn(&ata_dev->dev,
"450NX errata present, disabling IDE DMA%s\n",
no_piix_dma == 2 ? " - a BIOS update may resolve this"
: "");
return no_piix_dma;
}
static void __devinit piix_init_pcs(struct ata_host *host,
const struct piix_map_db *map_db)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
u16 pcs, new_pcs;
pci_read_config_word(pdev, ICH5_PCS, &pcs);
new_pcs = pcs | map_db->port_enable;
if (new_pcs != pcs) {
DPRINTK("updating PCS from 0x%x to 0x%x\n", pcs, new_pcs);
pci_write_config_word(pdev, ICH5_PCS, new_pcs);
msleep(150);
}
}
static const int *__devinit piix_init_sata_map(struct pci_dev *pdev,
struct ata_port_info *pinfo,
const struct piix_map_db *map_db)
{
const int *map;
int i, invalid_map = 0;
u8 map_value;
pci_read_config_byte(pdev, ICH5_PMR, &map_value);
map = map_db->map[map_value & map_db->mask];
dev_info(&pdev->dev, "MAP [");
for (i = 0; i < 4; i++) {
switch (map[i]) {
case RV:
invalid_map = 1;
pr_cont(" XX");
break;
case NA:
pr_cont(" --");
break;
case IDE:
WARN_ON((i & 1) || map[i + 1] != IDE);
pinfo[i / 2] = piix_port_info[ich_pata_100];
i++;
pr_cont(" IDE IDE");
break;
default:
pr_cont(" P%d", map[i]);
if (i & 1)
pinfo[i / 2].flags |= ATA_FLAG_SLAVE_POSS;
break;
}
}
pr_cont(" ]\n");
if (invalid_map)
dev_err(&pdev->dev, "invalid MAP value %u\n", map_value);
return map;
}
static bool piix_no_sidpr(struct ata_host *host)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
/*
* Samsung DB-P70 only has three ATA ports exposed and
* curiously the unconnected first port reports link online
* while not responding to SRST protocol causing excessive
* detection delay.
*
* Unfortunately, the system doesn't carry enough DMI
* information to identify the machine but does have subsystem
* vendor and device set. As it's unclear whether the
* subsystem vendor/device is used only for this specific
* board, the port can't be disabled solely with the
* information; however, turning off SIDPR access works around
* the problem. Turn it off.
*
* This problem is reported in bnc#441240.
*
* https://bugzilla.novell.com/show_bug.cgi?id=441420
*/
if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2920 &&
pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG &&
pdev->subsystem_device == 0xb049) {
dev_warn(host->dev,
"Samsung DB-P70 detected, disabling SIDPR\n");
return true;
}
return false;
}
static int __devinit piix_init_sidpr(struct ata_host *host)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
struct piix_host_priv *hpriv = host->private_data;
struct ata_link *link0 = &host->ports[0]->link;
u32 scontrol;
int i, rc;
/* check for availability */
for (i = 0; i < 4; i++)
if (hpriv->map[i] == IDE)
return 0;
/* is it blacklisted? */
if (piix_no_sidpr(host))
return 0;
if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR))
return 0;
if (pci_resource_start(pdev, PIIX_SIDPR_BAR) == 0 ||
pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN)
return 0;
if (pcim_iomap_regions(pdev, 1 << PIIX_SIDPR_BAR, DRV_NAME))
return 0;
hpriv->sidpr = pcim_iomap_table(pdev)[PIIX_SIDPR_BAR];
/* SCR access via SIDPR doesn't work on some configurations.
* Give it a test drive by inhibiting power save modes which
* we'll do anyway.
*/
piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
/* if IPM is already 3, SCR access is probably working. Don't
* un-inhibit power save modes as BIOS might have inhibited
* them for a reason.
*/
if ((scontrol & 0xf00) != 0x300) {
scontrol |= 0x300;
piix_sidpr_scr_write(link0, SCR_CONTROL, scontrol);
piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
if ((scontrol & 0xf00) != 0x300) {
dev_info(host->dev,
"SCR access via SIDPR is available but doesn't work\n");
return 0;
}
}
/* okay, SCRs available, set ops and ask libata for slave_link */
for (i = 0; i < 2; i++) {
struct ata_port *ap = host->ports[i];
ap->ops = &piix_sidpr_sata_ops;
if (ap->flags & ATA_FLAG_SLAVE_POSS) {
rc = ata_slave_link_init(ap);
if (rc)
return rc;
}
}
return 0;
}
static void piix_iocfg_bit18_quirk(struct ata_host *host)
{
static const struct dmi_system_id sysids[] = {
{
/* Clevo M570U sets IOCFG bit 18 if the cdrom
* isn't used to boot the system which
* disables the channel.
*/
.ident = "M570U",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Clevo Co."),
DMI_MATCH(DMI_PRODUCT_NAME, "M570U"),
},
},
{ } /* terminate list */
};
struct pci_dev *pdev = to_pci_dev(host->dev);
struct piix_host_priv *hpriv = host->private_data;
if (!dmi_check_system(sysids))
return;
/* The datasheet says that bit 18 is NOOP but certain systems
* seem to use it to disable a channel. Clear the bit on the
* affected systems.
*/
if (hpriv->saved_iocfg & (1 << 18)) {
dev_info(&pdev->dev, "applying IOCFG bit18 quirk\n");
pci_write_config_dword(pdev, PIIX_IOCFG,
hpriv->saved_iocfg & ~(1 << 18));
}
}
static bool piix_broken_system_poweroff(struct pci_dev *pdev)
{
static const struct dmi_system_id broken_systems[] = {
{
.ident = "HP Compaq 2510p",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 2510p"),
},
/* PCI slot number of the controller */
.driver_data = (void *)0x1FUL,
},
{
.ident = "HP Compaq nc6000",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nc6000"),
},
/* PCI slot number of the controller */
.driver_data = (void *)0x1FUL,
},
{ } /* terminate list */
};
const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
if (dmi) {
unsigned long slot = (unsigned long)dmi->driver_data;
/* apply the quirk only to on-board controllers */
return slot == PCI_SLOT(pdev->devfn);
}
return false;
}
/**
* piix_init_one - Register PIIX ATA PCI device with kernel services
* @pdev: PCI device to register
* @ent: Entry in piix_pci_tbl matching with @pdev
*
* Called from kernel PCI layer. We probe for combined mode (sigh),
* and then hand over control to libata, for it to do the rest.
*
* LOCKING:
* Inherited from PCI layer (may sleep).
*
* RETURNS:
* Zero on success, or -ERRNO value.
*/
static int __devinit piix_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct device *dev = &pdev->dev;
struct ata_port_info port_info[2];
const struct ata_port_info *ppi[] = { &port_info[0], &port_info[1] };
struct scsi_host_template *sht = &piix_sht;
unsigned long port_flags;
struct ata_host *host;
struct piix_host_priv *hpriv;
int rc;
ata_print_version_once(&pdev->dev, DRV_VERSION);
/* no hotplugging support for later devices (FIXME) */
if (!in_module_init && ent->driver_data >= ich5_sata)
return -ENODEV;
if (piix_broken_system_poweroff(pdev)) {
piix_port_info[ent->driver_data].flags |=
ATA_FLAG_NO_POWEROFF_SPINDOWN |
ATA_FLAG_NO_HIBERNATE_SPINDOWN;
dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
"on poweroff and hibernation\n");
}
port_info[0] = piix_port_info[ent->driver_data];
port_info[1] = piix_port_info[ent->driver_data];
port_flags = port_info[0].flags;
/* enable device and prepare host */
rc = pcim_enable_device(pdev);
if (rc)
return rc;
hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
if (!hpriv)
return -ENOMEM;
/* Save IOCFG, this will be used for cable detection, quirk
* detection and restoration on detach. This is necessary
* because some ACPI implementations mess up cable related
* bits on _STM. Reported on kernel bz#11879.
*/
pci_read_config_dword(pdev, PIIX_IOCFG, &hpriv->saved_iocfg);
/* ICH6R may be driven by either ata_piix or ahci driver
* regardless of BIOS configuration. Make sure AHCI mode is
* off.
*/
if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2652) {
rc = piix_disable_ahci(pdev);
if (rc)
return rc;
}
/* SATA map init can change port_info, do it before prepping host */
if (port_flags & ATA_FLAG_SATA)
hpriv->map = piix_init_sata_map(pdev, port_info,
piix_map_db_table[ent->driver_data]);
rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
if (rc)
return rc;
host->private_data = hpriv;
/* initialize controller */
if (port_flags & ATA_FLAG_SATA) {
piix_init_pcs(host, piix_map_db_table[ent->driver_data]);
rc = piix_init_sidpr(host);
if (rc)
return rc;
if (host->ports[0]->ops == &piix_sidpr_sata_ops)
sht = &piix_sidpr_sht;
}
/* apply IOCFG bit18 quirk */
piix_iocfg_bit18_quirk(host);
/* On ICH5, some BIOSen disable the interrupt using the
* PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
* On ICH6, this bit has the same effect, but only when
* MSI is disabled (and it is disabled, as we don't use
* message-signalled interrupts currently).
*/
if (port_flags & PIIX_FLAG_CHECKINTR)
pci_intx(pdev, 1);
if (piix_check_450nx_errata(pdev)) {
/* This writes into the master table but it does not
really matter for this errata as we will apply it to
all the PIIX devices on the board */
host->ports[0]->mwdma_mask = 0;
host->ports[0]->udma_mask = 0;
host->ports[1]->mwdma_mask = 0;
host->ports[1]->udma_mask = 0;
}
host->flags |= ATA_HOST_PARALLEL_SCAN;
pci_set_master(pdev);
return ata_pci_sff_activate_host(host, ata_bmdma_interrupt, sht);
}
static void piix_remove_one(struct pci_dev *pdev)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
struct piix_host_priv *hpriv = host->private_data;
pci_write_config_dword(pdev, PIIX_IOCFG, hpriv->saved_iocfg);
ata_pci_remove_one(pdev);
}
static int __init piix_init(void)
{
int rc;
DPRINTK("pci_register_driver\n");
rc = pci_register_driver(&piix_pci_driver);
if (rc)
return rc;
in_module_init = 0;
DPRINTK("done\n");
return 0;
}
static void __exit piix_exit(void)
{
pci_unregister_driver(&piix_pci_driver);
}
module_init(piix_init);
module_exit(piix_exit);
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