/* * 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 "2.00" 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_IGNORE_PCS = (1 << 25), /* ignore PCS present bits */ 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_FLAG_COMBINED = (1 << 29), /* combined mode possible */ /* ICH6/7 use different scheme for map value */ PIIX_FLAG_COMBINED_ICH6 = PIIX_FLAG_COMBINED | (1 << 30), /* 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 */ piix4_pata = 0, ich5_pata = 1, ich5_sata = 2, esb_sata = 3, ich6_sata = 4, ich6_sata_ahci = 5, ich6m_sata_ahci = 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 avaliable */ RV = -3, /* reserved */ PIIX_AHCI_DEVICE = 6, }; struct piix_map_db { const u32 mask; const int map[][4]; }; static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); 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 piix_pata_error_handler(struct ata_port *ap); static void piix_sata_error_handler(struct ata_port *ap); static unsigned int in_module_init = 1; static const struct pci_device_id piix_pci_tbl[] = { #ifdef ATA_ENABLE_PATA { 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix4_pata }, { 0x8086, 0x24db, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata }, { 0x8086, 0x25a2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata }, { 0x8086, 0x27df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata }, #endif /* 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, esb_sata }, /* 6300ESB pretending RAID */ { 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, esb_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 (where's the datasheet?) */ { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci }, /* SATA Controller 1 IDE (ICH8, no datasheet yet) */ { 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci }, /* SATA Controller 2 IDE (ICH8, ditto) */ { 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci }, /* Mobile SATA Controller IDE (ICH8M, ditto) */ { 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_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, .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, }; 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, .resume = ata_scsi_device_resume, .suspend = ata_scsi_device_suspend, }; 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_pio_data_xfer, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = piix_pata_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .port_start = ata_port_start, .port_stop = ata_port_stop, .host_stop = ata_host_stop, }; 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_pio_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, .port_start = ata_port_start, .port_stop = ata_port_stop, .host_stop = ata_host_stop, }; static struct piix_map_db ich5_map_db = { .mask = 0x7, .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 struct piix_map_db ich6_map_db = { .mask = 0x3, .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 struct piix_map_db ich6m_map_db = { .mask = 0x3, .map = { /* PM PS SM SS MAP */ { P0, P2, RV, RV }, /* 00b */ { RV, RV, RV, RV }, { P0, P2, IDE, IDE }, /* 10b */ { RV, RV, RV, RV }, }, }; static struct ata_port_info piix_port_info[] = { /* piix4_pata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SLAVE_POSS, .pio_mask = 0x1f, /* pio0-4 */ #if 0 .mwdma_mask = 0x06, /* mwdma1-2 */ #else .mwdma_mask = 0x00, /* mwdma broken */ #endif .udma_mask = ATA_UDMA_MASK_40C, .port_ops = &piix_pata_ops, }, /* ich5_pata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SLAVE_POSS | PIIX_FLAG_CHECKINTR, .pio_mask = 0x1f, /* pio0-4 */ #if 0 .mwdma_mask = 0x06, /* mwdma1-2 */ #else .mwdma_mask = 0x00, /* mwdma broken */ #endif .udma_mask = 0x3f, /* udma0-5 */ .port_ops = &piix_pata_ops, }, /* ich5_sata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &piix_sata_ops, .private_data = &ich5_map_db, }, /* i6300esb_sata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR | PIIX_FLAG_IGNORE_PCS, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &piix_sata_ops, .private_data = &ich5_map_db, }, /* ich6_sata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | PIIX_FLAG_COMBINED_ICH6 | PIIX_FLAG_CHECKINTR | PIIX_FLAG_SCR, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &piix_sata_ops, .private_data = &ich6_map_db, }, /* ich6_sata_ahci */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | PIIX_FLAG_COMBINED_ICH6 | PIIX_FLAG_CHECKINTR | 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, .private_data = &ich6_map_db, }, /* ich6m_sata_ahci */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | PIIX_FLAG_COMBINED_ICH6 | PIIX_FLAG_CHECKINTR | 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, .private_data = &ich6m_map_db, }, }; 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); /** * piix_pata_cbl_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 void piix_pata_cbl_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); u8 tmp, mask; /* no 80c support in host controller? */ if ((ap->udma_mask & ~ATA_UDMA_MASK_40C) == 0) goto cbl40; /* check BIOS cable detect results */ mask = ap->hard_port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC; pci_read_config_byte(pdev, PIIX_IOCFG, &tmp); if ((tmp & mask) == 0) goto cbl40; ap->cbl = ATA_CBL_PATA80; return; cbl40: ap->cbl = ATA_CBL_PATA40; ap->udma_mask &= ATA_UDMA_MASK_40C; } /** * piix_pata_prereset - prereset for PATA host controller * @ap: Target port * * Prereset including cable detection. * * LOCKING: * None (inherited from caller). */ static int piix_pata_prereset(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->hard_port_no])) { ata_port_printk(ap, KERN_INFO, "port disabled. ignoring.\n"); ap->eh_context.i.action &= ~ATA_EH_RESET_MASK; return 0; } piix_pata_cbl_detect(ap); return ata_std_prereset(ap); } 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); } /** * piix_sata_prereset - prereset for SATA host controller * @ap: Target port * * Reads and configures SATA PCI device's PCI config register * Port Configuration and Status (PCS) to determine port and * device availability. Return -ENODEV to skip reset if no * device is present. * * LOCKING: * None (inherited from caller). * * RETURNS: * 0 if device is present, -ENODEV otherwise. */ static int piix_sata_prereset(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); const unsigned int *map = ap->host_set->private_data; int base = 2 * ap->hard_port_no; unsigned int present_mask = 0; int port, i; u8 pcs; pci_read_config_byte(pdev, ICH5_PCS, &pcs); DPRINTK("ata%u: ENTER, pcs=0x%x base=%d\n", ap->id, pcs, base); /* enable all ports on this ap and wait for them to settle */ for (i = 0; i < 2; i++) { port = map[base + i]; if (port >= 0) pcs |= 1 << port; } pci_write_config_byte(pdev, ICH5_PCS, pcs); msleep(100); /* let's see which devices are present */ pci_read_config_byte(pdev, ICH5_PCS, &pcs); for (i = 0; i < 2; i++) { port = map[base + i]; if (port < 0) continue; if (ap->flags & PIIX_FLAG_IGNORE_PCS || pcs & 1 << (4 + port)) present_mask |= 1 << i; else pcs &= ~(1 << port); } /* disable offline ports on non-AHCI controllers */ if (!(ap->flags & PIIX_FLAG_AHCI)) pci_write_config_byte(pdev, ICH5_PCS, pcs); DPRINTK("ata%u: LEAVE, pcs=0x%x present_mask=0x%x\n", ap->id, pcs, present_mask); if (!present_mask) { ata_port_printk(ap, KERN_INFO, "SATA port has no device.\n"); ap->eh_context.i.action &= ~ATA_EH_RESET_MASK; return 0; } return ata_std_prereset(ap); } static void piix_sata_error_handler(struct ata_port *ap) { ata_bmdma_drive_eh(ap, piix_sata_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_set->dev); unsigned int is_slave = (adev->devno != 0); unsigned int master_port= ap->hard_port_no ? 0x42 : 0x40; unsigned int slave_port = 0x44; u16 master_data; u8 slave_data; 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 (is_slave) { master_data |= 0x4000; /* enable PPE, IE and TIME */ master_data |= 0x0070; pci_read_config_byte(dev, slave_port, &slave_data); slave_data &= (ap->hard_port_no ? 0x0f : 0xf0); slave_data |= (timings[pio][0] << 2) | (timings[pio][1] << (ap->hard_port_no ? 4 : 0)); } else { master_data &= 0xccf8; /* enable PPE, IE and TIME */ master_data |= 0x0007; 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); } /** * piix_set_dmamode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: um * @udma: udma mode, 0 - 6 * * Set 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) { unsigned int udma = adev->dma_mode; /* FIXME: MWDMA too */ struct pci_dev *dev = to_pci_dev(ap->host_set->dev); u8 maslave = ap->hard_port_no ? 0x42 : 0x40; u8 speed = udma; unsigned int drive_dn = (ap->hard_port_no ? 2 : 0) + adev->devno; int a_speed = 3 << (drive_dn * 4); int u_flag = 1 << drive_dn; int v_flag = 0x01 << drive_dn; int w_flag = 0x10 << drive_dn; int u_speed = 0; int sitre; u16 reg4042, reg4a; u8 reg48, reg54, reg55; pci_read_config_word(dev, maslave, ®4042); DPRINTK("reg4042 = 0x%04x\n", reg4042); sitre = (reg4042 & 0x4000) ? 1 : 0; pci_read_config_byte(dev, 0x48, ®48); pci_read_config_word(dev, 0x4a, ®4a); pci_read_config_byte(dev, 0x54, ®54); pci_read_config_byte(dev, 0x55, ®55); switch(speed) { case XFER_UDMA_4: case XFER_UDMA_2: u_speed = 2 << (drive_dn * 4); break; case XFER_UDMA_6: case XFER_UDMA_5: case XFER_UDMA_3: case XFER_UDMA_1: u_speed = 1 << (drive_dn * 4); break; case XFER_UDMA_0: u_speed = 0 << (drive_dn * 4); break; case XFER_MW_DMA_2: case XFER_MW_DMA_1: break; default: BUG(); return; } if (speed >= XFER_UDMA_0) { if (!(reg48 & u_flag)) pci_write_config_byte(dev, 0x48, reg48 | u_flag); if (speed == XFER_UDMA_5) { pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag); } else { pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); } if ((reg4a & a_speed) != u_speed) pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed); if (speed > XFER_UDMA_2) { if (!(reg54 & v_flag)) pci_write_config_byte(dev, 0x54, reg54 | v_flag); } else pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); } else { if (reg48 & u_flag) pci_write_config_byte(dev, 0x48, reg48 & ~u_flag); if (reg4a & a_speed) pci_write_config_word(dev, 0x4a, reg4a & ~a_speed); if (reg54 & v_flag) pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); if (reg55 & w_flag) pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); } } #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_sata_map(struct pci_dev *pdev, struct ata_port_info *pinfo) { struct piix_map_db *map_db = 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[ich5_pata]; i++; printk(" IDE IDE"); break; default: printk(" P%d", map[i]); if (i & 1) pinfo[i / 2].host_flags |= ATA_FLAG_SLAVE_POSS; break; } } printk(" ]\n"); if (invalid_map) dev_printk(KERN_ERR, &pdev->dev, "invalid MAP value %u\n", map_value); pinfo[0].private_data = (void *)map; pinfo[1].private_data = (void *)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 ata_port_info port_info[2]; struct ata_port_info *ppinfo[2] = { &port_info[0], &port_info[1] }; unsigned long host_flags; if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); /* no hotplugging support (FIXME) */ if (!in_module_init) return -ENODEV; port_info[0] = piix_port_info[ent->driver_data]; port_info[1] = piix_port_info[ent->driver_data]; host_flags = port_info[0].host_flags; if (host_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 (host_flags & ATA_FLAG_SATA) piix_init_sata_map(pdev, port_info); /* 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 (host_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, ppinfo, 2); } static int __init piix_init(void) { int rc; DPRINTK("pci_module_init\n"); rc = pci_module_init(&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);