diff options
Diffstat (limited to 'drivers/ata/pata_piccolo.c')
| -rw-r--r-- | drivers/ata/pata_piccolo.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/ata/pata_piccolo.c b/drivers/ata/pata_piccolo.c new file mode 100644 index 000000000..389b63b13 --- /dev/null +++ b/drivers/ata/pata_piccolo.c @@ -0,0 +1,125 @@ +/* + * pata_piccolo.c - Toshiba Piccolo PATA/SATA controller driver. + * + * This is basically an update to ata_generic.c to add Toshiba Piccolo support + * then split out to keep ata_generic "clean". + * + * Copyright 2005 Red Hat Inc, all rights reserved. + * + * Elements from ide/pci/generic.c + * Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org> + * Portions (C) Copyright 2002 Red Hat Inc <alan@redhat.com> + * + * May be copied or modified under the terms of the GNU General Public License + * + * The timing data tables/programming info are courtesy of the NetBSD driver + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/blkdev.h> +#include <linux/delay.h> +#include <scsi/scsi_host.h> +#include <linux/libata.h> + +#define DRV_NAME "pata_piccolo" +#define DRV_VERSION "0.0.1" + + + +static void tosh_set_piomode(struct ata_port *ap, struct ata_device *adev) +{ + static const u16 pio[6] = { /* For reg 0x50 low word & E088 */ + 0x0566, 0x0433, 0x0311, 0x0201, 0x0200, 0x0100 + }; + struct pci_dev *pdev = to_pci_dev(ap->host->dev); + u16 conf; + pci_read_config_word(pdev, 0x50, &conf); + conf &= 0xE088; + conf |= pio[adev->pio_mode - XFER_PIO_0]; + pci_write_config_word(pdev, 0x50, conf); +} + +static void tosh_set_dmamode(struct ata_port *ap, struct ata_device *adev) +{ + struct pci_dev *pdev = to_pci_dev(ap->host->dev); + u32 conf; + pci_read_config_dword(pdev, 0x5C, &conf); + conf &= 0x78FFE088; /* Keep the other bits */ + if (adev->dma_mode >= XFER_UDMA_0) { + int udma = adev->dma_mode - XFER_UDMA_0; + conf |= 0x80000000; + conf |= (udma + 2) << 28; + conf |= (2 - udma) * 0x111; /* spread into three nibbles */ + } else { + static const u32 mwdma[4] = { + 0x0655, 0x0200, 0x0200, 0x0100 + }; + conf |= mwdma[adev->dma_mode - XFER_MW_DMA_0]; + } + pci_write_config_dword(pdev, 0x5C, conf); +} + + +static struct scsi_host_template tosh_sht = { + ATA_BMDMA_SHT(DRV_NAME), +}; + +static struct ata_port_operations tosh_port_ops = { + .inherits = &ata_bmdma_port_ops, + .cable_detect = ata_cable_unknown, + .set_piomode = tosh_set_piomode, + .set_dmamode = tosh_set_dmamode +}; + +/** + * ata_tosh_init_one - attach generic IDE + * @dev: PCI device found + * @id: match entry + * + * Called each time a matching IDE interface is found. We check if the + * interface is one we wish to claim and if so we perform any chip + * specific hacks then let the ATA layer do the heavy lifting. + */ + +static int ata_tosh_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + static const struct ata_port_info info = { + .flags = ATA_FLAG_SLAVE_POSS, + .pio_mask = ATA_PIO5, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA2, + .port_ops = &tosh_port_ops + }; + const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; + /* Just one port for the moment */ + return ata_pci_bmdma_init_one(dev, ppi, &tosh_sht, NULL, 0); +} + +static struct pci_device_id ata_tosh[] = { + { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, + { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, + { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), }, + { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), }, + { 0, }, +}; + +static struct pci_driver ata_tosh_pci_driver = { + .name = DRV_NAME, + .id_table = ata_tosh, + .probe = ata_tosh_init_one, + .remove = ata_pci_remove_one, +#ifdef CONFIG_PM_SLEEP + .suspend = ata_pci_device_suspend, + .resume = ata_pci_device_resume, +#endif +}; + +module_pci_driver(ata_tosh_pci_driver); + +MODULE_AUTHOR("Alan Cox"); +MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(pci, ata_tosh); +MODULE_VERSION(DRV_VERSION); |