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