/* * sata_via.c - VIA Serial ATA controllers * * Maintained by: Jeff Garzik <jgarzik@pobox.com> * Please ALWAYS copy linux-ide@vger.kernel.org * on emails. * * Copyright 2003-2004 Red Hat, Inc. All rights reserved. * Copyright 2003-2004 Jeff Garzik * * * 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 under NDA. * * * */ #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 "sata_via" #define DRV_VERSION "2.3" enum board_ids_enum { vt6420, vt6421, }; enum { SATA_CHAN_ENAB = 0x40, /* SATA channel enable */ SATA_INT_GATE = 0x41, /* SATA interrupt gating */ SATA_NATIVE_MODE = 0x42, /* Native mode enable */ PATA_UDMA_TIMING = 0xB3, /* PATA timing for DMA/ cable detect */ PATA_PIO_TIMING = 0xAB, /* PATA timing register */ PORT0 = (1 << 1), PORT1 = (1 << 0), ALL_PORTS = PORT0 | PORT1, NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4), SATA_EXT_PHY = (1 << 6), /* 0==use PATA, 1==ext phy */ }; static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val); static void svia_noop_freeze(struct ata_port *ap); static int vt6420_prereset(struct ata_link *link, unsigned long deadline); static int vt6421_pata_cable_detect(struct ata_port *ap); static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev); static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev); static const struct pci_device_id svia_pci_tbl[] = { { PCI_VDEVICE(VIA, 0x5337), vt6420 }, { PCI_VDEVICE(VIA, 0x0591), vt6420 }, { PCI_VDEVICE(VIA, 0x3149), vt6420 }, { PCI_VDEVICE(VIA, 0x3249), vt6421 }, { PCI_VDEVICE(VIA, 0x5287), vt6420 }, { PCI_VDEVICE(VIA, 0x5372), vt6420 }, { PCI_VDEVICE(VIA, 0x7372), vt6420 }, { } /* terminate list */ }; static struct pci_driver svia_pci_driver = { .name = DRV_NAME, .id_table = svia_pci_tbl, .probe = svia_init_one, #ifdef CONFIG_PM .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, #endif .remove = ata_pci_remove_one, }; static struct scsi_host_template svia_sht = { ATA_BMDMA_SHT(DRV_NAME), }; static struct ata_port_operations vt6420_sata_ops = { .inherits = &ata_bmdma_port_ops, .freeze = svia_noop_freeze, .prereset = vt6420_prereset, }; static struct ata_port_operations vt6421_pata_ops = { .inherits = &ata_bmdma_port_ops, .cable_detect = vt6421_pata_cable_detect, .set_piomode = vt6421_set_pio_mode, .set_dmamode = vt6421_set_dma_mode, }; static struct ata_port_operations vt6421_sata_ops = { .inherits = &ata_bmdma_port_ops, .scr_read = svia_scr_read, .scr_write = svia_scr_write, }; static const struct ata_port_info vt6420_port_info = { .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = ATA_UDMA6, .port_ops = &vt6420_sata_ops, }; static struct ata_port_info vt6421_sport_info = { .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = ATA_UDMA6, .port_ops = &vt6421_sata_ops, }; static struct ata_port_info vt6421_pport_info = { .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_LEGACY, .pio_mask = 0x1f, .mwdma_mask = 0, .udma_mask = ATA_UDMA6, .port_ops = &vt6421_pata_ops, }; MODULE_AUTHOR("Jeff Garzik"); MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, svia_pci_tbl); MODULE_VERSION(DRV_VERSION); static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val) { if (sc_reg > SCR_CONTROL) return -EINVAL; *val = ioread32(ap->ioaddr.scr_addr + (4 * sc_reg)); return 0; } static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) return -EINVAL; iowrite32(val, ap->ioaddr.scr_addr + (4 * sc_reg)); return 0; } static void svia_noop_freeze(struct ata_port *ap) { /* Some VIA controllers choke if ATA_NIEN is manipulated in * certain way. Leave it alone and just clear pending IRQ. */ ap->ops->sff_check_status(ap); ata_sff_irq_clear(ap); } /** * vt6420_prereset - prereset for vt6420 * @link: target ATA link * @deadline: deadline jiffies for the operation * * SCR registers on vt6420 are pieces of shit and may hang the * whole machine completely if accessed with the wrong timing. * To avoid such catastrophe, vt6420 doesn't provide generic SCR * access operations, but uses SStatus and SControl only during * boot probing in controlled way. * * As the old (pre EH update) probing code is proven to work, we * strictly follow the access pattern. * * LOCKING: * Kernel thread context (may sleep) * * RETURNS: * 0 on success, -errno otherwise. */ static int vt6420_prereset(struct ata_link *link, unsigned long deadline) { struct ata_port *ap = link->ap; struct ata_eh_context *ehc = &ap->link.eh_context; unsigned long timeout = jiffies + (HZ * 5); u32 sstatus, scontrol; int online; /* don't do any SCR stuff if we're not loading */ if (!(ap->pflags & ATA_PFLAG_LOADING)) goto skip_scr; /* Resume phy. This is the old SATA resume sequence */ svia_scr_write(ap, SCR_CONTROL, 0x300); svia_scr_read(ap, SCR_CONTROL, &scontrol); /* flush */ /* wait for phy to become ready, if necessary */ do { msleep(200); svia_scr_read(ap, SCR_STATUS, &sstatus); if ((sstatus & 0xf) != 1) break; } while (time_before(jiffies, timeout)); /* open code sata_print_link_status() */ svia_scr_read(ap, SCR_STATUS, &sstatus); svia_scr_read(ap, SCR_CONTROL, &scontrol); online = (sstatus & 0xf) == 0x3; ata_port_printk(ap, KERN_INFO, "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n", online ? "up" : "down", sstatus, scontrol); /* SStatus is read one more time */ svia_scr_read(ap, SCR_STATUS, &sstatus); if (!online) { /* tell EH to bail */ ehc->i.action &= ~ATA_EH_RESET; return 0; } skip_scr: /* wait for !BSY */ ata_sff_wait_ready(link, deadline); return 0; } static int vt6421_pata_cable_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 tmp; pci_read_config_byte(pdev, PATA_UDMA_TIMING, &tmp); if (tmp & 0x10) return ATA_CBL_PATA40; return ATA_CBL_PATA80; } static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 }; pci_write_config_byte(pdev, PATA_PIO_TIMING, pio_bits[adev->pio_mode - XFER_PIO_0]); } static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 }; pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->dma_mode - XFER_UDMA_0]); } static const unsigned int svia_bar_sizes[] = { 8, 4, 8, 4, 16, 256 }; static const unsigned int vt6421_bar_sizes[] = { 16, 16, 16, 16, 32, 128 }; static void __iomem *svia_scr_addr(void __iomem *addr, unsigned int port) { return addr + (port * 128); } static void __iomem *vt6421_scr_addr(void __iomem *addr, unsigned int port) { return addr + (port * 64); } static void vt6421_init_addrs(struct ata_port *ap) { void __iomem * const * iomap = ap->host->iomap; void __iomem *reg_addr = iomap[ap->port_no]; void __iomem *bmdma_addr = iomap[4] + (ap->port_no * 8); struct ata_ioports *ioaddr = &ap->ioaddr; ioaddr->cmd_addr = reg_addr; ioaddr->altstatus_addr = ioaddr->ctl_addr = (void __iomem *) ((unsigned long)(reg_addr + 8) | ATA_PCI_CTL_OFS); ioaddr->bmdma_addr = bmdma_addr; ioaddr->scr_addr = vt6421_scr_addr(iomap[5], ap->port_no); ata_sff_std_ports(ioaddr); ata_port_pbar_desc(ap, ap->port_no, -1, "port"); ata_port_pbar_desc(ap, 4, ap->port_no * 8, "bmdma"); } static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host) { const struct ata_port_info *ppi[] = { &vt6420_port_info, NULL }; struct ata_host *host; int rc; rc = ata_pci_sff_prepare_host(pdev, ppi, &host); if (rc) return rc; *r_host = host; rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME); if (rc) { dev_printk(KERN_ERR, &pdev->dev, "failed to iomap PCI BAR 5\n"); return rc; } host->ports[0]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 0); host->ports[1]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 1); return 0; } static int vt6421_prepare_host(struct pci_dev *pdev, struct ata_host **r_host) { const struct ata_port_info *ppi[] = { &vt6421_sport_info, &vt6421_sport_info, &vt6421_pport_info }; struct ata_host *host; int i, rc; *r_host = host = ata_host_alloc_pinfo(&pdev->dev, ppi, ARRAY_SIZE(ppi)); if (!host) { dev_printk(KERN_ERR, &pdev->dev, "failed to allocate host\n"); return -ENOMEM; } rc = pcim_iomap_regions(pdev, 0x3f, DRV_NAME); if (rc) { dev_printk(KERN_ERR, &pdev->dev, "failed to request/iomap " "PCI BARs (errno=%d)\n", rc); return rc; } host->iomap = pcim_iomap_table(pdev); for (i = 0; i < host->n_ports; i++) vt6421_init_addrs(host->ports[i]); rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); if (rc) return rc; rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); if (rc) return rc; return 0; } static void svia_configure(struct pci_dev *pdev) { u8 tmp8; pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8); dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n", (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f); /* make sure SATA channels are enabled */ pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8); if ((tmp8 & ALL_PORTS) != ALL_PORTS) { dev_printk(KERN_DEBUG, &pdev->dev, "enabling SATA channels (0x%x)\n", (int) tmp8); tmp8 |= ALL_PORTS; pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8); } /* make sure interrupts for each channel sent to us */ pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8); if ((tmp8 & ALL_PORTS) != ALL_PORTS) { dev_printk(KERN_DEBUG, &pdev->dev, "enabling SATA channel interrupts (0x%x)\n", (int) tmp8); tmp8 |= ALL_PORTS; pci_write_config_byte(pdev, SATA_INT_GATE, tmp8); } /* make sure native mode is enabled */ pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8); if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) { dev_printk(KERN_DEBUG, &pdev->dev, "enabling SATA channel native mode (0x%x)\n", (int) tmp8); tmp8 |= NATIVE_MODE_ALL; pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8); } } static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { static int printed_version; unsigned int i; int rc; struct ata_host *host; int board_id = (int) ent->driver_data; const unsigned *bar_sizes; if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); rc = pcim_enable_device(pdev); if (rc) return rc; if (board_id == vt6420) bar_sizes = &svia_bar_sizes[0]; else bar_sizes = &vt6421_bar_sizes[0]; for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++) if ((pci_resource_start(pdev, i) == 0) || (pci_resource_len(pdev, i) < bar_sizes[i])) { dev_printk(KERN_ERR, &pdev->dev, "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n", i, (unsigned long long)pci_resource_start(pdev, i), (unsigned long long)pci_resource_len(pdev, i)); return -ENODEV; } if (board_id == vt6420) rc = vt6420_prepare_host(pdev, &host); else rc = vt6421_prepare_host(pdev, &host); if (rc) return rc; svia_configure(pdev); pci_set_master(pdev); return ata_host_activate(host, pdev->irq, ata_sff_interrupt, IRQF_SHARED, &svia_sht); } static int __init svia_init(void) { return pci_register_driver(&svia_pci_driver); } static void __exit svia_exit(void) { pci_unregister_driver(&svia_pci_driver); } module_init(svia_init); module_exit(svia_exit);