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linux/drivers/ata/ata_piix.c
Tejun Heo 1626aeb881 libata: clean up SFF init mess 
The intention of using port_mask in SFF init helpers was to eventually
support exoctic configurations such as combination of legacy and
native port on the same controller.  This never became actually
necessary and the related code always has been subtly broken one way
or the other.  Now that new init model is in place, there is no reason
to make common helpers capable of handling all corner cases.  Exotic
cases can simply dealt within LLDs as necessary.

This patch removes port_mask handling in SFF init helpers.  SFF init
helpers don't take n_ports argument and interpret it into port_mask
anymore.  All information is carried via port_info.  n_ports argument
is dropped and always two ports are allocated.  LLD can tell SFF to
skip certain port by marking it dummy.  Note that SFF code has been
treating unuvailable ports this way for a long time until recent
breakage fix from Linus and is consistent with how other drivers
handle with unavailable ports.

This fixes 1-port legacy host handling still broken after the recent
native mode fix and simplifies SFF init logic.  The following changes
are made...

* ata_pci_init_native_host() and ata_init_legacy_host() both now try
  to initialized whatever they can and mark failed ports dummy.  They
  return 0 if any port is successfully initialized.

* ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't
  take n_ports argument.  All info should be specified via port_info
  array.  Always two ports are allocated.

* ata_pci_init_bmdma() exported to be used by LLDs in exotic cases.

* port_info handling in all LLDs are standardized - all port_info
  arrays are const stack variable named ppi.  Unless the second port
  is different from the first, its port_info is specified as NULL
  (tells libata that it's identical to the last non-NULL port_info).

* pata_hpt37x/hpt3x2n: don't modify static variable directly.  Make an
  on-stack copy instead as ata_piix does.

* pata_uli: It has 4 ports instead of 2.  Don't use
  ata_pci_prepare_native_host().  Allocate the host explicitly and use
  init helpers.  It's simple enough.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-11 18:09:18 -04:00

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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 <alan@redhat.com>
*
*
* 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>
#define DRV_NAME "ata_piix"
#define DRV_VERSION "2.11"
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_33 = 0, /* PIIX4 at 33Mhz */
ich_pata_33 = 1, /* ICH up to UDMA 33 only */
ich_pata_66 = 2, /* ICH up to 66 Mhz */
ich_pata_100 = 3, /* ICH up to UDMA 100 */
ich_pata_133 = 4, /* ICH up to UDMA 133 */
ich5_sata = 5,
ich6_sata = 6,
ich6_sata_ahci = 7,
ich6m_sata_ahci = 8,
ich8_sata_ahci = 9,
piix_pata_mwdma = 10, /* PIIX3 MWDMA only */
/* 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,
};
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_sata_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 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 },
/* 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_133 },
/* 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_133 },
{ 0x8086, 0x269E, 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_sata_ahci },
/* Mobile SATA Controller IDE (ICH8M) */
{ 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_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_sata_ahci },
/* SATA Controller IDE (ICH9) */
{ 0x8086, 0x2926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
/* SATA Controller IDE (ICH9M) */
{ 0x8086, 0x2928, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
/* SATA Controller IDE (ICH9M) */
{ 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
/* SATA Controller IDE (ICH9M) */
{ 0x8086, 0x292e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_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 = ata_pci_device_suspend,
.resume = ata_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 = {
.port_disable = ata_port_disable,
.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,
.irq_ack = ata_irq_ack,
.port_start = ata_port_start,
};
static const struct ata_port_operations ich_pata_ops = {
.port_disable = ata_port_disable,
.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,
.irq_ack = ata_irq_ack,
.port_start = ata_port_start,
};
static const struct ata_port_operations piix_sata_ops = {
.port_disable = ata_port_disable,
.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_sata_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,
.irq_ack = ata_irq_ack,
.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, RV, RV }, /* 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 = 0x3,
.map = {
/* PM PS SM SS MAP */
{ P0, P2, P1, P3 }, /* 00b (hardwired when in AHCI) */
{ RV, RV, RV, RV },
{ IDE, IDE, NA, NA }, /* 10b (IDE mode) */
{ RV, RV, RV, RV },
},
};
static const struct piix_map_db *piix_map_db_table[] = {
[ich5_sata] = &ich5_map_db,
[ich6_sata] = &ich6_map_db,
[ich6_sata_ahci] = &ich6_map_db,
[ich6m_sata_ahci] = &ich6m_map_db,
[ich8_sata_ahci] = &ich8_map_db,
};
static struct ata_port_info piix_port_info[] = {
/* piix_pata_33: 0: PIIX4 at 33MHz */
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
.udma_mask = ATA_UDMA_MASK_40C,
.port_ops = &piix_pata_ops,
},
/* ich_pata_33: 1 ICH0 - ICH at 33Mhz*/
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS,
.pio_mask = 0x1f, /* pio 0-4 */
.mwdma_mask = 0x06, /* Check: maybe 0x07 */
.udma_mask = ATA_UDMA2, /* UDMA33 */
.port_ops = &ich_pata_ops,
},
/* ich_pata_66: 2 ICH controllers up to 66MHz */
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS,
.pio_mask = 0x1f, /* pio 0-4 */
.mwdma_mask = 0x06, /* MWDMA0 is broken on chip */
.udma_mask = ATA_UDMA4,
.port_ops = &ich_pata_ops,
},
/* ich_pata_100: 3 */
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x06, /* mwdma1-2 */
.udma_mask = ATA_UDMA5, /* udma0-5 */
.port_ops = &ich_pata_ops,
},
/* ich_pata_133: 4 ICH with full UDMA6 */
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
.pio_mask = 0x1f, /* pio 0-4 */
.mwdma_mask = 0x06, /* Check: maybe 0x07 */
.udma_mask = ATA_UDMA6, /* UDMA133 */
.port_ops = &ich_pata_ops,
},
/* ich5_sata: 5 */
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 */
.port_ops = &piix_sata_ops,
},
/* ich6_sata: 6 */
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 */
.port_ops = &piix_sata_ops,
},
/* ich6_sata_ahci: 7 */
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
PIIX_FLAG_AHCI,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 */
.port_ops = &piix_sata_ops,
},
/* ich6m_sata_ahci: 8 */
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
PIIX_FLAG_AHCI,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 */
.port_ops = &piix_sata_ops,
},
/* ich8_sata_ahci: 9 */
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
PIIX_FLAG_AHCI,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 */
.port_ops = &piix_sata_ops,
},
/* piix_pata_mwdma: 10: PIIX3 MWDMA only */
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
.port_ops = &piix_pata_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, 0x0110 }, /* ICH7 on Acer 3682WLMi */
{ 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
/* end marker */
{ 0, }
};
/**
* 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);
const struct ich_laptop *lap = &ich_laptop[0];
u8 tmp, 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;
pci_read_config_byte(pdev, PIIX_IOCFG, &tmp);
if ((tmp & mask) == 0)
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}
/**
* piix_pata_prereset - prereset for PATA host controller
* @ap: Target port
* @deadline: deadline jiffies for the operation
*
* LOCKING:
* None (inherited from caller).
*/
static int piix_pata_prereset(struct ata_port *ap, unsigned long deadline)
{
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_std_prereset(ap, deadline);
}
static void piix_pata_error_handler(struct ata_port *ap)
{
ata_bmdma_drive_eh(ap, piix_pata_prereset, ata_std_softreset, NULL,
ata_std_postreset);
}
static void piix_sata_error_handler(struct ata_port *ap)
{
ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, NULL,
ata_std_postreset);
}
/**
* piix_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: um
*
* 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)
{
unsigned int pio = adev->pio_mode - XFER_PIO_0;
struct pci_dev *dev = to_pci_dev(ap->host->dev);
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 */
pci_read_config_word(dev, master_port, &master_data);
if (is_slave) {
/* Enable SITRE (seperate slave timing register) */
master_data |= 0x4000;
/* 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 {
/* Master keeps the bits in a different format */
master_data &= 0xccf8;
/* Enable PPE, IE and TIME as appropriate */
master_data |= control;
master_data |=
(timings[pio][0] << 12) |
(timings[pio][1] << 8);
}
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);
}
}
/**
* do_pata_set_dmamode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Drive in question
* @udma: udma mode, 0 - 6
* @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);
u8 master_port = ap->port_no ? 0x42 : 0x40;
u16 master_data;
u8 speed = adev->dma_mode;
int devid = adev->devno + 2 * ap->port_no;
u8 udma_enable = 0;
static const /* ISP RTC */
u8 timings[][2] = { { 0, 0 },
{ 0, 0 },
{ 1, 0 },
{ 2, 1 },
{ 2, 3 }, };
pci_read_config_word(dev, master_port, &master_data);
if (ap->udma_mask)
pci_read_config_byte(dev, 0x48, &udma_enable);
if (speed >= XFER_UDMA_0) {
unsigned int udma = adev->dma_mode - XFER_UDMA_0;
u16 udma_timing;
u16 ideconf;
int u_clock, u_speed;
/*
* 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);
}
} else {
/*
* MWDMA is driven by the PIO timings. We must also enable
* IORDY unconditionally along with TIME1. PPE has already
* been set when the PIO timing was set.
*/
unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0;
unsigned int control;
u8 slave_data;
const unsigned int needed_pio[3] = {
XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
};
int pio = needed_pio[mwdma] - XFER_PIO_0;
control = 3; /* IORDY|TIME1 */
/* If the drive MWDMA is faster than it can do PIO then
we must force PIO into PIO0 */
if (adev->pio_mode < needed_pio[mwdma])
/* Enable DMA timing only */
control |= 8; /* PIO cycles in PIO0 */
if (adev->devno) { /* Slave */
master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */
master_data |= control << 4;
pci_read_config_byte(dev, 0x44, &slave_data);
slave_data &= (0x0F + 0xE1 * ap->port_no);
/* Load the matching timing */
slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);
pci_write_config_byte(dev, 0x44, slave_data);
} else { /* Master */
master_data &= 0xCCF4; /* Mask out IORDY|TIME1|DMAONLY
and master timing bits */
master_data |= control;
master_data |=
(timings[pio][0] << 12) |
(timings[pio][1] << 8);
}
udma_enable &= ~(1 << devid);
pci_write_config_word(dev, master_port, master_data);
}
/* Don't scribble on 0x48 if the controller does not support UDMA */
if (ap->udma_mask)
pci_write_config_byte(dev, 0x48, udma_enable);
}
/**
* 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);
}
#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 = readl(mmio + AHCI_GLOBAL_CTL);
if (tmp & AHCI_ENABLE) {
tmp &= ~AHCI_ENABLE;
writel(tmp, mmio + AHCI_GLOBAL_CTL);
tmp = readl(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;
u8 rev;
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_byte(pdev, PCI_REVISION_ID, &rev);
pci_read_config_word(pdev, 0x41, &cfg);
/* Only on the original revision: IDE DMA can hang */
if (rev == 0x00)
no_piix_dma = 1;
/* On all revisions below 5 PXB bus lock must be disabled for IDE */
else if (cfg & (1<<14) && rev < 5)
no_piix_dma = 2;
}
if (no_piix_dma)
dev_printk(KERN_WARNING, &ata_dev->dev, "450NX errata present, disabling IDE DMA.\n");
if (no_piix_dma == 2)
dev_printk(KERN_WARNING, &ata_dev->dev, "A BIOS update may resolve this.\n");
return no_piix_dma;
}
static void __devinit piix_init_pcs(struct pci_dev *pdev,
struct ata_port_info *pinfo,
const struct piix_map_db *map_db)
{
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 void __devinit piix_init_sata_map(struct pci_dev *pdev,
struct ata_port_info *pinfo,
const struct piix_map_db *map_db)
{
struct piix_host_priv *hpriv = pinfo[0].private_data;
const unsigned 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_printk(KERN_INFO, &pdev->dev, "MAP [");
for (i = 0; i < 4; i++) {
switch (map[i]) {
case RV:
invalid_map = 1;
printk(" XX");
break;
case NA:
printk(" --");
break;
case IDE:
WARN_ON((i & 1) || map[i + 1] != IDE);
pinfo[i / 2] = piix_port_info[ich_pata_100];
pinfo[i / 2].private_data = hpriv;
i++;
printk(" IDE IDE");
break;
default:
printk(" P%d", map[i]);
if (i & 1)
pinfo[i / 2].flags |= ATA_FLAG_SLAVE_POSS;
break;
}
}
printk(" ]\n");
if (invalid_map)
dev_printk(KERN_ERR, &pdev->dev,
"invalid MAP value %u\n", map_value);
hpriv->map = map;
}
/**
* 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 piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
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 piix_host_priv *hpriv;
unsigned long port_flags;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev,
"version " DRV_VERSION "\n");
/* no hotplugging support (FIXME) */
if (!in_module_init)
return -ENODEV;
hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
if (!hpriv)
return -ENOMEM;
port_info[0] = piix_port_info[ent->driver_data];
port_info[1] = piix_port_info[ent->driver_data];
port_info[0].private_data = hpriv;
port_info[1].private_data = hpriv;
port_flags = port_info[0].flags;
if (port_flags & PIIX_FLAG_AHCI) {
u8 tmp;
pci_read_config_byte(pdev, PIIX_SCC, &tmp);
if (tmp == PIIX_AHCI_DEVICE) {
int rc = piix_disable_ahci(pdev);
if (rc)
return rc;
}
}
/* Initialize SATA map */
if (port_flags & ATA_FLAG_SATA) {
piix_init_sata_map(pdev, port_info,
piix_map_db_table[ent->driver_data]);
piix_init_pcs(pdev, port_info,
piix_map_db_table[ent->driver_data]);
}
/* 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 */
port_info[0].mwdma_mask = 0;
port_info[0].udma_mask = 0;
port_info[1].mwdma_mask = 0;
port_info[1].udma_mask = 0;
}
return ata_pci_init_one(pdev, ppi);
}
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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