| /* |
| * pata-cs5530.c - CS5530 PATA for new ATA layer |
| * (C) 2005 Red Hat Inc |
| * Alan Cox <alan@redhat.com> |
| * |
| * based upon cs5530.c by Mark Lord. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * 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; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * Loosely based on the piix & svwks drivers. |
| * |
| * Documentation: |
| * Available from AMD web site. |
| */ |
| |
| #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/scsi_host.h> |
| #include <linux/libata.h> |
| #include <linux/dmi.h> |
| |
| #define DRV_NAME "pata_cs5530" |
| #define DRV_VERSION "0.7.4" |
| |
| static void __iomem *cs5530_port_base(struct ata_port *ap) |
| { |
| unsigned long bmdma = (unsigned long)ap->ioaddr.bmdma_addr; |
| |
| return (void __iomem *)((bmdma & ~0x0F) + 0x20 + 0x10 * ap->port_no); |
| } |
| |
| /** |
| * cs5530_set_piomode - PIO setup |
| * @ap: ATA interface |
| * @adev: device on the interface |
| * |
| * Set our PIO requirements. This is fairly simple on the CS5530 |
| * chips. |
| */ |
| |
| static void cs5530_set_piomode(struct ata_port *ap, struct ata_device *adev) |
| { |
| static const unsigned int cs5530_pio_timings[2][5] = { |
| {0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010}, |
| {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010} |
| }; |
| void __iomem *base = cs5530_port_base(ap); |
| u32 tuning; |
| int format; |
| |
| /* Find out which table to use */ |
| tuning = ioread32(base + 0x04); |
| format = (tuning & 0x80000000UL) ? 1 : 0; |
| |
| /* Now load the right timing register */ |
| if (adev->devno) |
| base += 0x08; |
| |
| iowrite32(cs5530_pio_timings[format][adev->pio_mode - XFER_PIO_0], base); |
| } |
| |
| /** |
| * cs5530_set_dmamode - DMA timing setup |
| * @ap: ATA interface |
| * @adev: Device being configured |
| * |
| * We cannot mix MWDMA and UDMA without reloading timings each switch |
| * master to slave. We track the last DMA setup in order to minimise |
| * reloads. |
| */ |
| |
| static void cs5530_set_dmamode(struct ata_port *ap, struct ata_device *adev) |
| { |
| void __iomem *base = cs5530_port_base(ap); |
| u32 tuning, timing = 0; |
| u8 reg; |
| |
| /* Find out which table to use */ |
| tuning = ioread32(base + 0x04); |
| |
| switch(adev->dma_mode) { |
| case XFER_UDMA_0: |
| timing = 0x00921250;break; |
| case XFER_UDMA_1: |
| timing = 0x00911140;break; |
| case XFER_UDMA_2: |
| timing = 0x00911030;break; |
| case XFER_MW_DMA_0: |
| timing = 0x00077771;break; |
| case XFER_MW_DMA_1: |
| timing = 0x00012121;break; |
| case XFER_MW_DMA_2: |
| timing = 0x00002020;break; |
| default: |
| BUG(); |
| } |
| /* Merge in the PIO format bit */ |
| timing |= (tuning & 0x80000000UL); |
| if (adev->devno == 0) /* Master */ |
| iowrite32(timing, base + 0x04); |
| else { |
| if (timing & 0x00100000) |
| tuning |= 0x00100000; /* UDMA for both */ |
| else |
| tuning &= ~0x00100000; /* MWDMA for both */ |
| iowrite32(tuning, base + 0x04); |
| iowrite32(timing, base + 0x0C); |
| } |
| |
| /* Set the DMA capable bit in the BMDMA area */ |
| reg = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| reg |= (1 << (5 + adev->devno)); |
| iowrite8(reg, ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| |
| /* Remember the last DMA setup we did */ |
| |
| ap->private_data = adev; |
| } |
| |
| /** |
| * cs5530_qc_issue - command issue |
| * @qc: command pending |
| * |
| * Called when the libata layer is about to issue a command. We wrap |
| * this interface so that we can load the correct ATA timings if |
| * necessary. Specifically we have a problem that there is only |
| * one MWDMA/UDMA bit. |
| */ |
| |
| static unsigned int cs5530_qc_issue(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| struct ata_device *adev = qc->dev; |
| struct ata_device *prev = ap->private_data; |
| |
| /* See if the DMA settings could be wrong */ |
| if (ata_dma_enabled(adev) && adev != prev && prev != NULL) { |
| /* Maybe, but do the channels match MWDMA/UDMA ? */ |
| if ((ata_using_udma(adev) && !ata_using_udma(prev)) || |
| (ata_using_udma(prev) && !ata_using_udma(adev))) |
| /* Switch the mode bits */ |
| cs5530_set_dmamode(ap, adev); |
| } |
| |
| return ata_sff_qc_issue(qc); |
| } |
| |
| static struct scsi_host_template cs5530_sht = { |
| ATA_BMDMA_SHT(DRV_NAME), |
| .sg_tablesize = LIBATA_DUMB_MAX_PRD, |
| }; |
| |
| static struct ata_port_operations cs5530_port_ops = { |
| .inherits = &ata_bmdma_port_ops, |
| |
| .qc_prep = ata_sff_dumb_qc_prep, |
| .qc_issue = cs5530_qc_issue, |
| |
| .cable_detect = ata_cable_40wire, |
| .set_piomode = cs5530_set_piomode, |
| .set_dmamode = cs5530_set_dmamode, |
| }; |
| |
| static const struct dmi_system_id palmax_dmi_table[] = { |
| { |
| .ident = "Palmax PD1100", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Cyrix"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Caddis"), |
| }, |
| }, |
| { } |
| }; |
| |
| static int cs5530_is_palmax(void) |
| { |
| if (dmi_check_system(palmax_dmi_table)) { |
| printk(KERN_INFO "Palmax PD1100: Disabling DMA on docking port.\n"); |
| return 1; |
| } |
| return 0; |
| } |
| |
| |
| /** |
| * cs5530_init_chip - Chipset init |
| * |
| * Perform the chip initialisation work that is shared between both |
| * setup and resume paths |
| */ |
| |
| static int cs5530_init_chip(void) |
| { |
| struct pci_dev *master_0 = NULL, *cs5530_0 = NULL, *dev = NULL; |
| |
| while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) { |
| switch (dev->device) { |
| case PCI_DEVICE_ID_CYRIX_PCI_MASTER: |
| master_0 = pci_dev_get(dev); |
| break; |
| case PCI_DEVICE_ID_CYRIX_5530_LEGACY: |
| cs5530_0 = pci_dev_get(dev); |
| break; |
| } |
| } |
| if (!master_0) { |
| printk(KERN_ERR DRV_NAME ": unable to locate PCI MASTER function\n"); |
| goto fail_put; |
| } |
| if (!cs5530_0) { |
| printk(KERN_ERR DRV_NAME ": unable to locate CS5530 LEGACY function\n"); |
| goto fail_put; |
| } |
| |
| pci_set_master(cs5530_0); |
| pci_try_set_mwi(cs5530_0); |
| |
| /* |
| * Set PCI CacheLineSize to 16-bytes: |
| * --> Write 0x04 into 8-bit PCI CACHELINESIZE reg of function 0 of the cs5530 |
| * |
| * Note: This value is constant because the 5530 is only a Geode companion |
| */ |
| |
| pci_write_config_byte(cs5530_0, PCI_CACHE_LINE_SIZE, 0x04); |
| |
| /* |
| * Disable trapping of UDMA register accesses (Win98 hack): |
| * --> Write 0x5006 into 16-bit reg at offset 0xd0 of function 0 of the cs5530 |
| */ |
| |
| pci_write_config_word(cs5530_0, 0xd0, 0x5006); |
| |
| /* |
| * Bit-1 at 0x40 enables MemoryWriteAndInvalidate on internal X-bus: |
| * The other settings are what is necessary to get the register |
| * into a sane state for IDE DMA operation. |
| */ |
| |
| pci_write_config_byte(master_0, 0x40, 0x1e); |
| |
| /* |
| * Set max PCI burst size (16-bytes seems to work best): |
| * 16bytes: set bit-1 at 0x41 (reg value of 0x16) |
| * all others: clear bit-1 at 0x41, and do: |
| * 128bytes: OR 0x00 at 0x41 |
| * 256bytes: OR 0x04 at 0x41 |
| * 512bytes: OR 0x08 at 0x41 |
| * 1024bytes: OR 0x0c at 0x41 |
| */ |
| |
| pci_write_config_byte(master_0, 0x41, 0x14); |
| |
| /* |
| * These settings are necessary to get the chip |
| * into a sane state for IDE DMA operation. |
| */ |
| |
| pci_write_config_byte(master_0, 0x42, 0x00); |
| pci_write_config_byte(master_0, 0x43, 0xc1); |
| |
| pci_dev_put(master_0); |
| pci_dev_put(cs5530_0); |
| return 0; |
| fail_put: |
| if (master_0) |
| pci_dev_put(master_0); |
| if (cs5530_0) |
| pci_dev_put(cs5530_0); |
| return -ENODEV; |
| } |
| |
| /** |
| * cs5530_init_one - Initialise a CS5530 |
| * @dev: PCI device |
| * @id: Entry in match table |
| * |
| * Install a driver for the newly found CS5530 companion chip. Most of |
| * this is just housekeeping. We have to set the chip up correctly and |
| * turn off various bits of emulation magic. |
| */ |
| |
| static int cs5530_init_one(struct pci_dev *pdev, const struct pci_device_id *id) |
| { |
| static const struct ata_port_info info = { |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x1f, |
| .mwdma_mask = 0x07, |
| .udma_mask = 0x07, |
| .port_ops = &cs5530_port_ops |
| }; |
| /* The docking connector doesn't do UDMA, and it seems not MWDMA */ |
| static const struct ata_port_info info_palmax_secondary = { |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x1f, |
| .port_ops = &cs5530_port_ops |
| }; |
| const struct ata_port_info *ppi[] = { &info, NULL }; |
| int rc; |
| |
| rc = pcim_enable_device(pdev); |
| if (rc) |
| return rc; |
| |
| /* Chip initialisation */ |
| if (cs5530_init_chip()) |
| return -ENODEV; |
| |
| if (cs5530_is_palmax()) |
| ppi[1] = &info_palmax_secondary; |
| |
| /* Now kick off ATA set up */ |
| return ata_pci_sff_init_one(pdev, ppi, &cs5530_sht, NULL); |
| } |
| |
| #ifdef CONFIG_PM |
| static int cs5530_reinit_one(struct pci_dev *pdev) |
| { |
| struct ata_host *host = dev_get_drvdata(&pdev->dev); |
| int rc; |
| |
| rc = ata_pci_device_do_resume(pdev); |
| if (rc) |
| return rc; |
| |
| /* If we fail on resume we are doomed */ |
| if (cs5530_init_chip()) |
| return -EIO; |
| |
| ata_host_resume(host); |
| return 0; |
| } |
| #endif /* CONFIG_PM */ |
| |
| static const struct pci_device_id cs5530[] = { |
| { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_IDE), }, |
| |
| { }, |
| }; |
| |
| static struct pci_driver cs5530_pci_driver = { |
| .name = DRV_NAME, |
| .id_table = cs5530, |
| .probe = cs5530_init_one, |
| .remove = ata_pci_remove_one, |
| #ifdef CONFIG_PM |
| .suspend = ata_pci_device_suspend, |
| .resume = cs5530_reinit_one, |
| #endif |
| }; |
| |
| static int __init cs5530_init(void) |
| { |
| return pci_register_driver(&cs5530_pci_driver); |
| } |
| |
| static void __exit cs5530_exit(void) |
| { |
| pci_unregister_driver(&cs5530_pci_driver); |
| } |
| |
| MODULE_AUTHOR("Alan Cox"); |
| MODULE_DESCRIPTION("low-level driver for the Cyrix/NS/AMD 5530"); |
| MODULE_LICENSE("GPL"); |
| MODULE_DEVICE_TABLE(pci, cs5530); |
| MODULE_VERSION(DRV_VERSION); |
| |
| module_init(cs5530_init); |
| module_exit(cs5530_exit); |