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 ATA_GEN_INTEL_IDER = (1 << 2), 39 }; 40 41 /** 42 * generic_set_mode - mode setting 43 * @link: link to set up 44 * @unused: returned device on error 45 * 46 * Use a non standard set_mode function. We don't want to be tuned. 47 * The BIOS configured everything. Our job is not to fiddle. We 48 * read the dma enabled bits from the PCI configuration of the device 49 * and respect them. 50 */ 51 52 static int generic_set_mode(struct ata_link *link, struct ata_device **unused) 53 { 54 struct ata_port *ap = link->ap; 55 const struct pci_device_id *id = ap->host->private_data; 56 int dma_enabled = 0; 57 struct ata_device *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 ata_for_each_dev(dev, link, ENABLED) { 67 /* We don't really care */ 68 dev->pio_mode = XFER_PIO_0; 69 dev->dma_mode = XFER_MW_DMA_0; 70 /* We do need the right mode information for DMA or PIO 71 and this comes from the current configuration flags */ 72 if (dma_enabled & (1 << (5 + dev->devno))) { 73 unsigned int xfer_mask = ata_id_xfermask(dev->id); 74 const char *name; 75 76 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 77 name = ata_mode_string(xfer_mask); 78 else { 79 /* SWDMA perhaps? */ 80 name = "DMA"; 81 xfer_mask |= ata_xfer_mode2mask(XFER_MW_DMA_0); 82 } 83 84 ata_dev_info(dev, "configured for %s\n", 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_info(dev, "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 * is_intel_ider - identify intel IDE-R devices 113 * @dev: PCI device 114 * 115 * Distinguish Intel IDE-R controller devices from other Intel IDE 116 * devices. IDE-R devices have no timing registers and are in 117 * most respects virtual. They should be driven by the ata_generic 118 * driver. 119 * 120 * IDE-R devices have PCI offset 0xF8.L as zero, later Intel ATA has 121 * it non zero. All Intel ATA has 0x40 writable (timing), but it is 122 * not writable on IDE-R devices (this is guaranteed). 123 */ 124 125 static int is_intel_ider(struct pci_dev *dev) 126 { 127 /* For Intel IDE the value at 0xF8 is only zero on IDE-R 128 interfaces */ 129 u32 r; 130 u16 t; 131 132 /* Check the manufacturing ID, it will be zero for IDE-R */ 133 pci_read_config_dword(dev, 0xF8, &r); 134 /* Not IDE-R: punt so that ata_(old)piix gets it */ 135 if (r != 0) 136 return 0; 137 /* 0xF8 will also be zero on some early Intel IDE devices 138 but they will have a sane timing register */ 139 pci_read_config_word(dev, 0x40, &t); 140 if (t != 0) 141 return 0; 142 /* Finally check if the timing register is writable so that 143 we eliminate any early devices hot-docked in a docking 144 station */ 145 pci_write_config_word(dev, 0x40, 1); 146 pci_read_config_word(dev, 0x40, &t); 147 if (t) { 148 pci_write_config_word(dev, 0x40, 0); 149 return 0; 150 } 151 return 1; 152 } 153 154 /** 155 * ata_generic_init - attach generic IDE 156 * @dev: PCI device found 157 * @id: match entry 158 * 159 * Called each time a matching IDE interface is found. We check if the 160 * interface is one we wish to claim and if so we perform any chip 161 * specific hacks then let the ATA layer do the heavy lifting. 162 */ 163 164 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id) 165 { 166 u16 command; 167 static const struct ata_port_info info = { 168 .flags = ATA_FLAG_SLAVE_POSS, 169 .pio_mask = ATA_PIO4, 170 .mwdma_mask = ATA_MWDMA2, 171 .udma_mask = ATA_UDMA5, 172 .port_ops = &generic_port_ops 173 }; 174 const struct ata_port_info *ppi[] = { &info, NULL }; 175 176 /* Don't use the generic entry unless instructed to do so */ 177 if ((id->driver_data & ATA_GEN_CLASS_MATCH) && all_generic_ide == 0) 178 return -ENODEV; 179 180 if (id->driver_data & ATA_GEN_INTEL_IDER) 181 if (!is_intel_ider(dev)) 182 return -ENODEV; 183 184 /* Devices that need care */ 185 if (dev->vendor == PCI_VENDOR_ID_UMC && 186 dev->device == PCI_DEVICE_ID_UMC_UM8886A && 187 (!(PCI_FUNC(dev->devfn) & 1))) 188 return -ENODEV; 189 190 if (dev->vendor == PCI_VENDOR_ID_OPTI && 191 dev->device == PCI_DEVICE_ID_OPTI_82C558 && 192 (!(PCI_FUNC(dev->devfn) & 1))) 193 return -ENODEV; 194 195 /* Don't re-enable devices in generic mode or we will break some 196 motherboards with disabled and unused IDE controllers */ 197 pci_read_config_word(dev, PCI_COMMAND, &command); 198 if (!(command & PCI_COMMAND_IO)) 199 return -ENODEV; 200 201 if (dev->vendor == PCI_VENDOR_ID_AL) 202 ata_pci_bmdma_clear_simplex(dev); 203 204 if (dev->vendor == PCI_VENDOR_ID_ATI) { 205 int rc = pcim_enable_device(dev); 206 if (rc < 0) 207 return rc; 208 pcim_pin_device(dev); 209 } 210 return ata_pci_bmdma_init_one(dev, ppi, &generic_sht, (void *)id, 0); 211 } 212 213 static struct pci_device_id ata_generic[] = { 214 { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), }, 215 { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), }, 216 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), }, 217 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), }, 218 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), }, 219 { PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), }, 220 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), }, 221 { PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), }, 222 { PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE), 223 .driver_data = ATA_GEN_FORCE_DMA }, 224 /* 225 * For some reason, MCP89 on MacBook 7,1 doesn't work with 226 * ahci, use ata_generic instead. 227 */ 228 { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP89_SATA, 229 PCI_VENDOR_ID_APPLE, 0xcb89, 230 .driver_data = ATA_GEN_FORCE_DMA }, 231 #if !defined(CONFIG_PATA_TOSHIBA) && !defined(CONFIG_PATA_TOSHIBA_MODULE) 232 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, 233 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, 234 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), }, 235 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), }, 236 #endif 237 /* Intel, IDE class device */ 238 { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 239 PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 240 .driver_data = ATA_GEN_INTEL_IDER }, 241 /* Must come last. If you add entries adjust this table appropriately */ 242 { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL), 243 .driver_data = ATA_GEN_CLASS_MATCH }, 244 { 0, }, 245 }; 246 247 static struct pci_driver ata_generic_pci_driver = { 248 .name = DRV_NAME, 249 .id_table = ata_generic, 250 .probe = ata_generic_init_one, 251 .remove = ata_pci_remove_one, 252 #ifdef CONFIG_PM 253 .suspend = ata_pci_device_suspend, 254 .resume = ata_pci_device_resume, 255 #endif 256 }; 257 258 static int __init ata_generic_init(void) 259 { 260 return pci_register_driver(&ata_generic_pci_driver); 261 } 262 263 264 static void __exit ata_generic_exit(void) 265 { 266 pci_unregister_driver(&ata_generic_pci_driver); 267 } 268 269 270 MODULE_AUTHOR("Alan Cox"); 271 MODULE_DESCRIPTION("low-level driver for generic ATA"); 272 MODULE_LICENSE("GPL"); 273 MODULE_DEVICE_TABLE(pci, ata_generic); 274 MODULE_VERSION(DRV_VERSION); 275 276 module_init(ata_generic_init); 277 module_exit(ata_generic_exit); 278 279 module_param(all_generic_ide, int, 0); 280