/* 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 2003-2004 Red Hat Inc Copyright 2003-2004 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> May be copied or modified under the terms of the GNU General Public License */ #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 "scsi.h" #include <scsi/scsi_host.h> #include <linux/libata.h> #define DRV_NAME "ata_piix" #define DRV_VERSION "1.03" enum { PIIX_IOCFG = 0x54, /* IDE I/O configuration register */ ICH5_PMR = 0x90, /* port mapping register */ ICH5_PCS = 0x92, /* port control and status */ PIIX_FLAG_AHCI = (1 << 28), /* AHCI possible */ PIIX_FLAG_CHECKINTR = (1 << 29), /* make sure PCI INTx enabled */ PIIX_FLAG_COMBINED = (1 << 30), /* combined mode possible */ /* combined mode. if set, PATA is channel 0. * if clear, PATA is channel 1. */ PIIX_COMB_PATA_P0 = (1 << 1), PIIX_COMB = (1 << 2), /* combined mode enabled? */ PIIX_PORT_PRESENT = (1 << 0), PIIX_PORT_ENABLED = (1 << 4), PIIX_80C_PRI = (1 << 5) | (1 << 4), PIIX_80C_SEC = (1 << 7) | (1 << 6), ich5_pata = 0, ich5_sata = 1, piix4_pata = 2, ich6_sata = 3, ich6_sata_rm = 4, ich7_sata = 5, esb2_sata = 6, }; static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); static void piix_pata_phy_reset(struct ata_port *ap); static void piix_sata_phy_reset(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 unsigned int in_module_init = 1; static 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 }, #endif /* NOTE: The following PCI ids must be kept in sync with the * list in drivers/pci/quirks.c. */ { 0x8086, 0x24d1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata }, { 0x8086, 0x24df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata }, { 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata }, { 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata }, { 0x8086, 0x2651, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata }, { 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_rm }, { 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_rm }, { 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich7_sata }, { 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich7_sata }, { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, esb2_sata }, { } /* 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, }; static Scsi_Host_Template piix_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .eh_strategy_handler = ata_scsi_error, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = LIBATA_MAX_PRD, .max_sectors = ATA_MAX_SECTORS, .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, .bios_param = ata_std_bios_param, .ordered_flush = 1, }; static struct ata_port_operations piix_pata_ops = { .port_disable = ata_port_disable, .set_piomode = piix_set_piomode, .set_dmamode = piix_set_dmamode, .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, .phy_reset = piix_pata_phy_reset, .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, .eng_timeout = ata_eng_timeout, .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 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, .phy_reset = piix_sata_phy_reset, .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, .eng_timeout = ata_eng_timeout, .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 ata_port_info piix_port_info[] = { /* ich5_pata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | 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 | ATA_FLAG_SRST | 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, }, /* piix4_pata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .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, }, /* ich6_sata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR | ATA_FLAG_SLAVE_POSS, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &piix_sata_ops, }, /* ich6_sata_rm */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR | ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &piix_sata_ops, }, /* ich7_sata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR | ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &piix_sata_ops, }, /* esb2_sata */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR | ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x7f, /* udma0-6 */ .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); /** * 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_phy_reset - Probe specified port on PATA host controller * @ap: Port to probe * * Probe PATA phy. * * LOCKING: * None (inherited from caller). */ static void piix_pata_phy_reset(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_disable(ap); printk(KERN_INFO "ata%u: port disabled. ignoring.\n", ap->id); return; } piix_pata_cbl_detect(ap); ata_port_probe(ap); ata_bus_reset(ap); } /** * piix_sata_probe - Probe PCI device for present SATA devices * @ap: Port associated with the PCI device we wish to probe * * Reads SATA PCI device's PCI config register Port Configuration * and Status (PCS) to determine port and device availability. * * LOCKING: * None (inherited from caller). * * RETURNS: * Non-zero if device detected, zero otherwise. */ static int piix_sata_probe (struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); int combined = (ap->flags & ATA_FLAG_SLAVE_POSS); int orig_mask, mask, i; u8 pcs; mask = (PIIX_PORT_PRESENT << ap->hard_port_no) | (PIIX_PORT_ENABLED << ap->hard_port_no); pci_read_config_byte(pdev, ICH5_PCS, &pcs); orig_mask = (int) pcs & 0xff; /* TODO: this is vaguely wrong for ICH6 combined mode, * where only two of the four SATA ports are mapped * onto a single ATA channel. It is also vaguely inaccurate * for ICH5, which has only two ports. However, this is ok, * as further device presence detection code will handle * any false positives produced here. */ for (i = 0; i < 4; i++) { mask = (PIIX_PORT_PRESENT << i) | (PIIX_PORT_ENABLED << i); if ((orig_mask & mask) == mask) if (combined || (i == ap->hard_port_no)) return 1; } return 0; } /** * piix_sata_phy_reset - Probe specified port on SATA host controller * @ap: Port to probe * * Probe SATA phy. * * LOCKING: * None (inherited from caller). */ static void piix_sata_phy_reset(struct ata_port *ap) { if (!piix_sata_probe(ap)) { ata_port_disable(ap); printk(KERN_INFO "ata%u: SATA port has no device.\n", ap->id); return; } ap->cbl = ATA_CBL_SATA; ata_port_probe(ap); ata_bus_reset(ap); } /** * piix_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: um * @pio: PIO mode, 0 - 4 * * 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); } } /* move to PCI layer, integrate w/ MSI stuff */ static void pci_enable_intx(struct pci_dev *pdev) { u16 pci_command; pci_read_config_word(pdev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_INTX_DISABLE) { pci_command &= ~PCI_COMMAND_INTX_DISABLE; pci_write_config_word(pdev, PCI_COMMAND, pci_command); } } #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 *mmio; unsigned long addr; 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. */ addr = pci_resource_start(pdev, AHCI_PCI_BAR); if (!addr || !pci_resource_len(pdev, AHCI_PCI_BAR)) return 0; mmio = ioremap(addr, 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; } iounmap(mmio); return rc; } /** * 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]; unsigned int combined = 0, n_ports = 1; unsigned int pata_chan = 0, sata_chan = 0; if (!printed_version++) printk(KERN_DEBUG DRV_NAME " 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] = NULL; if (port_info[0]->host_flags & PIIX_FLAG_AHCI) { int rc = piix_disable_ahci(pdev); if (rc) return rc; } if (port_info[0]->host_flags & PIIX_FLAG_COMBINED) { u8 tmp; pci_read_config_byte(pdev, ICH5_PMR, &tmp); if (tmp & PIIX_COMB) { combined = 1; if (tmp & PIIX_COMB_PATA_P0) sata_chan = 1; else pata_chan = 1; } } /* 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_info[0]->host_flags & PIIX_FLAG_CHECKINTR) pci_enable_intx(pdev); if (combined) { port_info[sata_chan] = &piix_port_info[ent->driver_data]; port_info[sata_chan]->host_flags |= ATA_FLAG_SLAVE_POSS; port_info[pata_chan] = &piix_port_info[ich5_pata]; n_ports++; printk(KERN_WARNING DRV_NAME ": combined mode detected\n"); } return ata_pci_init_one(pdev, port_info, n_ports); } 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);