drivers/ata/pata_piccolo.c

0001 /*
0002  *  pata_piccolo.c - Toshiba Piccolo PATA/SATA controller driver.
0003  *
0004  *  This is basically an update to ata_generic.c to add Toshiba Piccolo support
0005  *  then split out to keep ata_generic "clean".
0006  *
0007  *  Copyright 2005 Red Hat Inc, all rights reserved.
0008  *
0009  *  Elements from ide/pci/generic.c
0010  *      Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org>
0011  *      Portions (C) Copyright 2002  Red Hat Inc <alan@redhat.com>
0012  *
0013  *  May be copied or modified under the terms of the GNU General Public License
0014  *
0015  *  The timing data tables/programming info are courtesy of the NetBSD driver
0016  */
0017
0018 #include <linux/kernel.h>
0019 #include <linux/module.h>
0020 #include <linux/pci.h>
0021 #include <linux/blkdev.h>
0022 #include <linux/delay.h>
0023 #include <scsi/scsi_host.h>
0024 #include <linux/libata.h>
0025
0026 #define DRV_NAME "pata_piccolo"
0027 #define DRV_VERSION "0.0.1"
0028
0029
0030
0031 static void tosh_set_piomode(struct ata_port *ap, struct ata_device *adev)
0032 {
0033     static const u16 pio[6] = { /* For reg 0x50 low word & E088 */
0034         0x0566, 0x0433, 0x0311, 0x0201, 0x0200, 0x0100
0035     };
0036     struct pci_dev *pdev = to_pci_dev(ap->host->dev);
0037     u16 conf;
0038     pci_read_config_word(pdev, 0x50, &conf);
0039     conf &= 0xE088;
0040     conf |= pio[adev->pio_mode - XFER_PIO_0];
0041     pci_write_config_word(pdev, 0x50, conf);
0042 }
0043
0044 static void tosh_set_dmamode(struct ata_port *ap, struct ata_device *adev)
0045 {
0046     struct pci_dev *pdev = to_pci_dev(ap->host->dev);
0047     u32 conf;
0048     pci_read_config_dword(pdev, 0x5C, &conf);
0049     conf &= 0x78FFE088; /* Keep the other bits */
0050     if (adev->dma_mode >= XFER_UDMA_0) {
0051         int udma = adev->dma_mode - XFER_UDMA_0;
0052         conf |= 0x80000000;
0053         conf |= (udma + 2) << 28;
0054         conf |= (2 - udma) * 0x111; /* spread into three nibbles */
0055     } else {
0056         static const u32 mwdma[4] = {
0057             0x0655, 0x0200, 0x0200, 0x0100
0058         };
0059         conf |= mwdma[adev->dma_mode - XFER_MW_DMA_0];
0060     }
0061     pci_write_config_dword(pdev, 0x5C, conf);
0062 }
0063
0064
0065 static struct scsi_host_template tosh_sht = {
0066     ATA_BMDMA_SHT(DRV_NAME),
0067 };
0068
0069 static struct ata_port_operations tosh_port_ops = {
0070     .inherits   = &ata_bmdma_port_ops,
0071     .cable_detect   = ata_cable_unknown,
0072     .set_piomode    = tosh_set_piomode,
0073     .set_dmamode    = tosh_set_dmamode
0074 };
0075
0076 /**
0077  *  ata_tosh_init_one       -   attach generic IDE
0078  *  @dev: PCI device found
0079  *  @id: match entry
0080  *
0081  *  Called each time a matching IDE interface is found. We check if the
0082  *  interface is one we wish to claim and if so we perform any chip
0083  *  specific hacks then let the ATA layer do the heavy lifting.
0084  */
0085
0086 static int ata_tosh_init_one(struct pci_dev *dev, const struct pci_device_id *id)
0087 {
0088     static const struct ata_port_info info = {
0089         .flags = ATA_FLAG_SLAVE_POSS,
0090         .pio_mask = ATA_PIO5,
0091         .mwdma_mask = ATA_MWDMA2,
0092         .udma_mask = ATA_UDMA2,
0093         .port_ops = &tosh_port_ops
0094     };
0095     const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
0096     /* Just one port for the moment */
0097     return ata_pci_bmdma_init_one(dev, ppi, &tosh_sht, NULL, 0);
0098 }
0099
0100 static struct pci_device_id ata_tosh[] = {
0101     { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
0102     { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
0103     { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3),  },
0104     { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5),  },
0105     { 0, },
0106 };
0107
0108 static struct pci_driver ata_tosh_pci_driver = {
0109     .name       = DRV_NAME,
0110     .id_table   = ata_tosh,
0111     .probe      = ata_tosh_init_one,
0112     .remove     = ata_pci_remove_one,
0113 #ifdef CONFIG_PM_SLEEP
0114     .suspend    = ata_pci_device_suspend,
0115     .resume     = ata_pci_device_resume,
0116 #endif
0117 };
0118
0119 module_pci_driver(ata_tosh_pci_driver);
0120
0121 MODULE_AUTHOR("Alan Cox");
0122 MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
0123 MODULE_LICENSE("GPL");
0124 MODULE_DEVICE_TABLE(pci, ata_tosh);
0125 MODULE_VERSION(DRV_VERSION);