diff options
Diffstat (limited to 'drivers/ata/pata_cs5530.c')
| -rw-r--r-- | drivers/ata/pata_cs5530.c | 387 |
1 files changed, 387 insertions, 0 deletions
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c new file mode 100644 index 0000000..f3d8a3b --- /dev/null +++ b/drivers/ata/pata_cs5530.c @@ -0,0 +1,387 @@ +/* + * 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 "0.6" + +/** + * 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} + }; + unsigned long base = ( ap->ioaddr.bmdma_addr & ~0x0F) + 0x20 + 0x10 * ap->port_no; + u32 tuning; + int format; + + /* Find out which table to use */ + tuning = inl(base + 0x04); + format = (tuning & 0x80000000UL) ? 1 : 0; + + /* Now load the right timing register */ + if (adev->devno) + base += 0x08; + + outl(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) +{ + unsigned long base = ( ap->ioaddr.bmdma_addr & ~0x0F) + 0x20 + 0x10 * ap->port_no; + u32 tuning, timing = 0; + u8 reg; + + /* Find out which table to use */ + tuning = inl(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 */ + outl(timing, base + 0x04); + else { + if (timing & 0x00100000) + tuning |= 0x00100000; /* UDMA for both */ + else + tuning &= ~0x00100000; /* MWDMA for both */ + outl(tuning, base + 0x04); + outl(timing, base + 0x0C); + } + + /* Set the DMA capable bit in the BMDMA area */ + reg = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); + reg |= (1 << (5 + adev->devno)); + outb(reg, ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); + + /* Remember the last DMA setup we did */ + + ap->private_data = adev; +} + +/** + * cs5530_qc_issue_prot - 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 + * neccessary. Specifically we have a problem that there is only + * one MWDMA/UDMA bit. + */ + +static unsigned int cs5530_qc_issue_prot(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 (adev->dma_mode != 0 && adev != prev && prev != NULL) { + /* Maybe, but do the channels match MWDMA/UDMA ? */ + if ((adev->dma_mode >= XFER_UDMA_0 && prev->dma_mode < XFER_UDMA_0) || + (adev->dma_mode < XFER_UDMA_0 && prev->dma_mode >= XFER_UDMA_0)) + /* Switch the mode bits */ + cs5530_set_dmamode(ap, adev); + } + + return ata_qc_issue_prot(qc); +} + +static int cs5530_pre_reset(struct ata_port *ap) +{ + ap->cbl = ATA_CBL_PATA40; + return ata_std_prereset(ap); +} + +static void cs5530_error_handler(struct ata_port *ap) +{ + return ata_bmdma_drive_eh(ap, cs5530_pre_reset, ata_std_softreset, NULL, ata_std_postreset); +} + + +static struct scsi_host_template cs5530_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, + .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, +}; + +static struct ata_port_operations cs5530_port_ops = { + .port_disable = ata_port_disable, + .set_piomode = cs5530_set_piomode, + .set_dmamode = cs5530_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, + + .freeze = ata_bmdma_freeze, + .thaw = ata_bmdma_thaw, + .error_handler = cs5530_error_handler, + .post_internal_cmd = ata_bmdma_post_internal_cmd, + + .qc_prep = ata_qc_prep, + .qc_issue = cs5530_qc_issue_prot, + .eng_timeout = ata_eng_timeout, + .data_xfer = ata_pio_data_xfer, + + .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 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_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 *dev, const struct pci_device_id *id) +{ + int compiler_warning_pointless_fix; + struct pci_dev *master_0 = NULL, *cs5530_0 = NULL; + static struct ata_port_info info = { + .sht = &cs5530_sht, + .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST, + .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 struct ata_port_info info_palmax_secondary = { + .sht = &cs5530_sht, + .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST, + .pio_mask = 0x1f, + .port_ops = &cs5530_port_ops + }; + static struct ata_port_info *port_info[2] = { &info, &info }; + + 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); + compiler_warning_pointless_fix = pci_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); + + if (cs5530_is_palmax()) + port_info[1] = &info_palmax_secondary; + + /* Now kick off ATA set up */ + return ata_pci_init_one(dev, port_info, 2); + +fail_put: + if (master_0) + pci_dev_put(master_0); + if (cs5530_0) + pci_dev_put(cs5530_0); + return -ENODEV; +} + +static struct pci_device_id cs5530[] = { + { PCI_DEVICE(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_IDE), }, + { 0, }, +}; + +static struct pci_driver cs5530_pci_driver = { + .name = DRV_NAME, + .id_table = cs5530, + .probe = cs5530_init_one, + .remove = ata_pci_remove_one +}; + +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); |
