1 /* 2 * ata_generic.c - Generic PATA/SATA controller driver. 3 * Copyright 2005 Red Hat Inc, 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 enum { 36 ATA_GEN_CLASS_MATCH = (1 << 0), 37 ATA_GEN_FORCE_DMA = (1 << 1), 38 }; 39 40 /** 41 * generic_set_mode - mode setting 42 * @link: link to set up 43 * @unused: returned device on error 44 * 45 * Use a non standard set_mode function. We don't want to be tuned. 46 * The BIOS configured everything. Our job is not to fiddle. We 47 * read the dma enabled bits from the PCI configuration of the device 48 * and respect them. 49 */ 50 51 static int generic_set_mode(struct ata_link *link, struct ata_device **unused) 52 { 53 struct ata_port *ap = link->ap; 54 const struct pci_device_id *id = ap->host->private_data; 55 int dma_enabled = 0; 56 struct ata_device *dev; 57 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 58 59 if (id->driver_data & ATA_GEN_FORCE_DMA) { 60 dma_enabled = 0xff; 61 } else if (ap->ioaddr.bmdma_addr) { 62 /* Bits 5 and 6 indicate if DMA is active on master/slave */ 63 dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 64 } 65 66 if (pdev->vendor == PCI_VENDOR_ID_CENATEK) 67 dma_enabled = 0xFF; 68 69 ata_for_each_dev(dev, link, ENABLED) { 70 /* We don't really care */ 71 dev->pio_mode = XFER_PIO_0; 72 dev->dma_mode = XFER_MW_DMA_0; 73 /* We do need the right mode information for DMA or PIO 74 and this comes from the current configuration flags */ 75 if (dma_enabled & (1 << (5 + dev->devno))) { 76 unsigned int xfer_mask = ata_id_xfermask(dev->id); 77 const char *name; 78 79 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 80 name = ata_mode_string(xfer_mask); 81 else { 82 /* SWDMA perhaps? */ 83 name = "DMA"; 84 xfer_mask |= ata_xfer_mode2mask(XFER_MW_DMA_0); 85 } 86 87 ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 88 name); 89 90 dev->xfer_mode = ata_xfer_mask2mode(xfer_mask); 91 dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode); 92 dev->flags &= ~ATA_DFLAG_PIO; 93 } else { 94 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); 95 dev->xfer_mode = XFER_PIO_0; 96 dev->xfer_shift = ATA_SHIFT_PIO; 97 dev->flags |= ATA_DFLAG_PIO; 98 } 99 } 100 return 0; 101 } 102 103 static struct scsi_host_template generic_sht = { 104 ATA_BMDMA_SHT(DRV_NAME), 105 }; 106 107 static struct ata_port_operations generic_port_ops = { 108 .inherits = &ata_bmdma_port_ops, 109 .cable_detect = ata_cable_unknown, 110 .set_mode = generic_set_mode, 111 }; 112 113 static int all_generic_ide; /* Set to claim all devices */ 114 115 /** 116 * ata_generic_init - attach generic IDE 117 * @dev: PCI device found 118 * @id: match entry 119 * 120 * Called each time a matching IDE interface is found. We check if the 121 * interface is one we wish to claim and if so we perform any chip 122 * specific hacks then let the ATA layer do the heavy lifting. 123 */ 124 125 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id) 126 { 127 u16 command; 128 static const struct ata_port_info info = { 129 .flags = ATA_FLAG_SLAVE_POSS, 130 .pio_mask = ATA_PIO4, 131 .mwdma_mask = ATA_MWDMA2, 132 .udma_mask = ATA_UDMA5, 133 .port_ops = &generic_port_ops 134 }; 135 const struct ata_port_info *ppi[] = { &info, NULL }; 136 137 /* Don't use the generic entry unless instructed to do so */ 138 if ((id->driver_data & ATA_GEN_CLASS_MATCH) && all_generic_ide == 0) 139 return -ENODEV; 140 141 /* Devices that need care */ 142 if (dev->vendor == PCI_VENDOR_ID_UMC && 143 dev->device == PCI_DEVICE_ID_UMC_UM8886A && 144 (!(PCI_FUNC(dev->devfn) & 1))) 145 return -ENODEV; 146 147 if (dev->vendor == PCI_VENDOR_ID_OPTI && 148 dev->device == PCI_DEVICE_ID_OPTI_82C558 && 149 (!(PCI_FUNC(dev->devfn) & 1))) 150 return -ENODEV; 151 152 /* Don't re-enable devices in generic mode or we will break some 153 motherboards with disabled and unused IDE controllers */ 154 pci_read_config_word(dev, PCI_COMMAND, &command); 155 if (!(command & PCI_COMMAND_IO)) 156 return -ENODEV; 157 158 if (dev->vendor == PCI_VENDOR_ID_AL) 159 ata_pci_bmdma_clear_simplex(dev); 160 161 if (dev->vendor == PCI_VENDOR_ID_ATI) { 162 int rc = pcim_enable_device(dev); 163 if (rc < 0) 164 return rc; 165 pcim_pin_device(dev); 166 } 167 return ata_pci_bmdma_init_one(dev, ppi, &generic_sht, (void *)id, 0); 168 } 169 170 static struct pci_device_id ata_generic[] = { 171 { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), }, 172 { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), }, 173 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), }, 174 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), }, 175 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), }, 176 { PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), }, 177 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), }, 178 { PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), }, 179 { PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE), 180 .driver_data = ATA_GEN_FORCE_DMA }, 181 /* 182 * For some reason, MCP89 on MacBook 7,1 doesn't work with 183 * ahci, use ata_generic instead. 184 */ 185 { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP89_SATA, 186 PCI_VENDOR_ID_APPLE, 0xcb89, 187 .driver_data = ATA_GEN_FORCE_DMA }, 188 #if !defined(CONFIG_PATA_TOSHIBA) && !defined(CONFIG_PATA_TOSHIBA_MODULE) 189 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, 190 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, 191 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), }, 192 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), }, 193 #endif 194 /* Must come last. If you add entries adjust this table appropriately */ 195 { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL), 196 .driver_data = ATA_GEN_CLASS_MATCH }, 197 { 0, }, 198 }; 199 200 static struct pci_driver ata_generic_pci_driver = { 201 .name = DRV_NAME, 202 .id_table = ata_generic, 203 .probe = ata_generic_init_one, 204 .remove = ata_pci_remove_one, 205 #ifdef CONFIG_PM 206 .suspend = ata_pci_device_suspend, 207 .resume = ata_pci_device_resume, 208 #endif 209 }; 210 211 static int __init ata_generic_init(void) 212 { 213 return pci_register_driver(&ata_generic_pci_driver); 214 } 215 216 217 static void __exit ata_generic_exit(void) 218 { 219 pci_unregister_driver(&ata_generic_pci_driver); 220 } 221 222 223 MODULE_AUTHOR("Alan Cox"); 224 MODULE_DESCRIPTION("low-level driver for generic ATA"); 225 MODULE_LICENSE("GPL"); 226 MODULE_DEVICE_TABLE(pci, ata_generic); 227 MODULE_VERSION(DRV_VERSION); 228 229 module_init(ata_generic_init); 230 module_exit(ata_generic_exit); 231 232 module_param(all_generic_ide, int, 0); 233