1 /* 2 * ata_generic.c - Generic PATA/SATA controller driver. 3 * Copyright 2005 Red Hat Inc <alan@redhat.com>, all rights reserved. 4 * 5 * Elements from ide/pci/generic.c 6 * Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org> 7 * Portions (C) Copyright 2002 Red Hat Inc <alan@redhat.com> 8 * 9 * May be copied or modified under the terms of the GNU General Public License 10 * 11 * Driver for PCI IDE interfaces implementing the standard bus mastering 12 * interface functionality. This assumes the BIOS did the drive set up and 13 * tuning for us. By default we do not grab all IDE class devices as they 14 * may have other drivers or need fixups to avoid problems. Instead we keep 15 * a default list of stuff without documentation/driver that appears to 16 * work. 17 */ 18 19 #include <linux/kernel.h> 20 #include <linux/module.h> 21 #include <linux/pci.h> 22 #include <linux/init.h> 23 #include <linux/blkdev.h> 24 #include <linux/delay.h> 25 #include <scsi/scsi_host.h> 26 #include <linux/libata.h> 27 28 #define DRV_NAME "ata_generic" 29 #define DRV_VERSION "0.2.15" 30 31 /* 32 * A generic parallel ATA driver using libata 33 */ 34 35 /** 36 * generic_set_mode - mode setting 37 * @link: link to set up 38 * @unused: returned device on error 39 * 40 * Use a non standard set_mode function. We don't want to be tuned. 41 * The BIOS configured everything. Our job is not to fiddle. We 42 * read the dma enabled bits from the PCI configuration of the device 43 * and respect them. 44 */ 45 46 static int generic_set_mode(struct ata_link *link, struct ata_device **unused) 47 { 48 struct ata_port *ap = link->ap; 49 int dma_enabled = 0; 50 struct ata_device *dev; 51 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 52 53 /* Bits 5 and 6 indicate if DMA is active on master/slave */ 54 if (ap->ioaddr.bmdma_addr) 55 dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 56 57 if (pdev->vendor == PCI_VENDOR_ID_CENATEK) 58 dma_enabled = 0xFF; 59 60 ata_link_for_each_dev(dev, link) { 61 if (!ata_dev_enabled(dev)) 62 continue; 63 64 /* We don't really care */ 65 dev->pio_mode = XFER_PIO_0; 66 dev->dma_mode = XFER_MW_DMA_0; 67 /* We do need the right mode information for DMA or PIO 68 and this comes from the current configuration flags */ 69 if (dma_enabled & (1 << (5 + dev->devno))) { 70 unsigned int xfer_mask = ata_id_xfermask(dev->id); 71 const char *name; 72 73 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 74 name = ata_mode_string(xfer_mask); 75 else { 76 /* SWDMA perhaps? */ 77 name = "DMA"; 78 xfer_mask |= ata_xfer_mode2mask(XFER_MW_DMA_0); 79 } 80 81 ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 82 name); 83 84 dev->xfer_mode = ata_xfer_mask2mode(xfer_mask); 85 dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode); 86 dev->flags &= ~ATA_DFLAG_PIO; 87 } else { 88 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); 89 dev->xfer_mode = XFER_PIO_0; 90 dev->xfer_shift = ATA_SHIFT_PIO; 91 dev->flags |= ATA_DFLAG_PIO; 92 } 93 } 94 return 0; 95 } 96 97 static struct scsi_host_template generic_sht = { 98 ATA_BMDMA_SHT(DRV_NAME), 99 }; 100 101 static struct ata_port_operations generic_port_ops = { 102 .inherits = &ata_bmdma_port_ops, 103 .cable_detect = ata_cable_unknown, 104 .set_mode = generic_set_mode, 105 }; 106 107 static int all_generic_ide; /* Set to claim all devices */ 108 109 /** 110 * ata_generic_init - attach generic IDE 111 * @dev: PCI device found 112 * @id: match entry 113 * 114 * Called each time a matching IDE interface is found. We check if the 115 * interface is one we wish to claim and if so we perform any chip 116 * specific hacks then let the ATA layer do the heavy lifting. 117 */ 118 119 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id) 120 { 121 u16 command; 122 static const struct ata_port_info info = { 123 .flags = ATA_FLAG_SLAVE_POSS, 124 .pio_mask = 0x1f, 125 .mwdma_mask = 0x07, 126 .udma_mask = ATA_UDMA5, 127 .port_ops = &generic_port_ops 128 }; 129 const struct ata_port_info *ppi[] = { &info, NULL }; 130 131 /* Don't use the generic entry unless instructed to do so */ 132 if (id->driver_data == 1 && all_generic_ide == 0) 133 return -ENODEV; 134 135 /* Devices that need care */ 136 if (dev->vendor == PCI_VENDOR_ID_UMC && 137 dev->device == PCI_DEVICE_ID_UMC_UM8886A && 138 (!(PCI_FUNC(dev->devfn) & 1))) 139 return -ENODEV; 140 141 if (dev->vendor == PCI_VENDOR_ID_OPTI && 142 dev->device == PCI_DEVICE_ID_OPTI_82C558 && 143 (!(PCI_FUNC(dev->devfn) & 1))) 144 return -ENODEV; 145 146 /* Don't re-enable devices in generic mode or we will break some 147 motherboards with disabled and unused IDE controllers */ 148 pci_read_config_word(dev, PCI_COMMAND, &command); 149 if (!(command & PCI_COMMAND_IO)) 150 return -ENODEV; 151 152 if (dev->vendor == PCI_VENDOR_ID_AL) 153 ata_pci_bmdma_clear_simplex(dev); 154 155 if (dev->vendor == PCI_VENDOR_ID_ATI) { 156 int rc = pcim_enable_device(dev); 157 if (rc < 0) 158 return rc; 159 pcim_pin_device(dev); 160 } 161 return ata_pci_sff_init_one(dev, ppi, &generic_sht, NULL); 162 } 163 164 static struct pci_device_id ata_generic[] = { 165 { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), }, 166 { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), }, 167 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), }, 168 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), }, 169 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), }, 170 { PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), }, 171 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), }, 172 { PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), }, 173 { PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE), }, 174 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), }, 175 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, 176 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, 177 /* Must come last. If you add entries adjust this table appropriately */ 178 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1}, 179 { 0, }, 180 }; 181 182 static struct pci_driver ata_generic_pci_driver = { 183 .name = DRV_NAME, 184 .id_table = ata_generic, 185 .probe = ata_generic_init_one, 186 .remove = ata_pci_remove_one, 187 #ifdef CONFIG_PM 188 .suspend = ata_pci_device_suspend, 189 .resume = ata_pci_device_resume, 190 #endif 191 }; 192 193 static int __init ata_generic_init(void) 194 { 195 return pci_register_driver(&ata_generic_pci_driver); 196 } 197 198 199 static void __exit ata_generic_exit(void) 200 { 201 pci_unregister_driver(&ata_generic_pci_driver); 202 } 203 204 205 MODULE_AUTHOR("Alan Cox"); 206 MODULE_DESCRIPTION("low-level driver for generic ATA"); 207 MODULE_LICENSE("GPL"); 208 MODULE_DEVICE_TABLE(pci, ata_generic); 209 MODULE_VERSION(DRV_VERSION); 210 211 module_init(ata_generic_init); 212 module_exit(ata_generic_exit); 213 214 module_param(all_generic_ide, int, 0); 215