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/blkdev.h> 23#include <linux/delay.h> 24#include <scsi/scsi_host.h> 25#include <linux/libata.h> 26 27#define DRV_NAME "ata_generic" 28#define DRV_VERSION "0.2.15" 29 30/* 31 * A generic parallel ATA driver using libata 32 */ 33 34enum { 35 ATA_GEN_CLASS_MATCH = (1 << 0), 36 ATA_GEN_FORCE_DMA = (1 << 1), 37 ATA_GEN_INTEL_IDER = (1 << 2), 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 51static 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_info(dev, "configured for %s\n", name); 84 85 dev->xfer_mode = ata_xfer_mask2mode(xfer_mask); 86 dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode); 87 dev->flags &= ~ATA_DFLAG_PIO; 88 } else { 89 ata_dev_info(dev, "configured for PIO\n"); 90 dev->xfer_mode = XFER_PIO_0; 91 dev->xfer_shift = ATA_SHIFT_PIO; 92 dev->flags |= ATA_DFLAG_PIO; 93 } 94 } 95 return 0; 96} 97 98static const struct scsi_host_template generic_sht = { 99 ATA_BMDMA_SHT(DRV_NAME), 100}; 101 102static struct ata_port_operations generic_port_ops = { 103 .inherits = &ata_bmdma_port_ops, 104 .cable_detect = ata_cable_unknown, 105 .set_mode = generic_set_mode, 106}; 107 108static int all_generic_ide; /* Set to claim all devices */ 109 110/** 111 * is_intel_ider - identify intel IDE-R devices 112 * @dev: PCI device 113 * 114 * Distinguish Intel IDE-R controller devices from other Intel IDE 115 * devices. IDE-R devices have no timing registers and are in 116 * most respects virtual. They should be driven by the ata_generic 117 * driver. 118 * 119 * IDE-R devices have PCI offset 0xF8.L as zero, later Intel ATA has 120 * it non zero. All Intel ATA has 0x40 writable (timing), but it is 121 * not writable on IDE-R devices (this is guaranteed). 122 */ 123 124static int is_intel_ider(struct pci_dev *dev) 125{ 126 /* For Intel IDE the value at 0xF8 is only zero on IDE-R 127 interfaces */ 128 u32 r; 129 u16 t; 130 131 /* Check the manufacturing ID, it will be zero for IDE-R */ 132 pci_read_config_dword(dev, 0xF8, &r); 133 /* Not IDE-R: punt so that ata_(old)piix gets it */ 134 if (r != 0) 135 return 0; 136 /* 0xF8 will also be zero on some early Intel IDE devices 137 but they will have a sane timing register */ 138 pci_read_config_word(dev, 0x40, &t); 139 if (t != 0) 140 return 0; 141 /* Finally check if the timing register is writable so that 142 we eliminate any early devices hot-docked in a docking 143 station */ 144 pci_write_config_word(dev, 0x40, 1); 145 pci_read_config_word(dev, 0x40, &t); 146 if (t) { 147 pci_write_config_word(dev, 0x40, 0); 148 return 0; 149 } 150 return 1; 151} 152 153/** 154 * ata_generic_init_one - attach generic IDE 155 * @dev: PCI device found 156 * @id: match entry 157 * 158 * Called each time a matching IDE interface is found. We check if the 159 * interface is one we wish to claim and if so we perform any chip 160 * specific hacks then let the ATA layer do the heavy lifting. 161 */ 162 163static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id) 164{ 165 u16 command; 166 static const struct ata_port_info info = { 167 .flags = ATA_FLAG_SLAVE_POSS, 168 .pio_mask = ATA_PIO4, 169 .mwdma_mask = ATA_MWDMA2, 170 .udma_mask = ATA_UDMA5, 171 .port_ops = &generic_port_ops 172 }; 173 const struct ata_port_info *ppi[] = { &info, NULL }; 174 175 /* Don't use the generic entry unless instructed to do so */ 176 if ((id->driver_data & ATA_GEN_CLASS_MATCH) && all_generic_ide == 0) 177 return -ENODEV; 178 179 if ((id->driver_data & ATA_GEN_INTEL_IDER) && !all_generic_ide) 180 if (!is_intel_ider(dev)) 181 return -ENODEV; 182 183 /* Devices that need care */ 184 if (dev->vendor == PCI_VENDOR_ID_UMC && 185 dev->device == PCI_DEVICE_ID_UMC_UM8886A && 186 (!(PCI_FUNC(dev->devfn) & 1))) 187 return -ENODEV; 188 189 if (dev->vendor == PCI_VENDOR_ID_OPTI && 190 dev->device == PCI_DEVICE_ID_OPTI_82C558 && 191 (!(PCI_FUNC(dev->devfn) & 1))) 192 return -ENODEV; 193 194 /* Don't re-enable devices in generic mode or we will break some 195 motherboards with disabled and unused IDE controllers */ 196 pci_read_config_word(dev, PCI_COMMAND, &command); 197 if (!(command & PCI_COMMAND_IO)) 198 return -ENODEV; 199 200 if (dev->vendor == PCI_VENDOR_ID_AL) 201 ata_pci_bmdma_clear_simplex(dev); 202 203 if (dev->vendor == PCI_VENDOR_ID_ATI) { 204 int rc = pcim_enable_device(dev); 205 if (rc < 0) 206 return rc; 207 pcim_pin_device(dev); 208 } 209 return ata_pci_bmdma_init_one(dev, ppi, &generic_sht, (void *)id, 0); 210} 211 212static struct pci_device_id ata_generic[] = { 213 { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), }, 214 { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), }, 215 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), }, 216 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), }, 217 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), }, 218 { PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), }, 219 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), }, 220 { PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), }, 221 { PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE), 222 .driver_data = ATA_GEN_FORCE_DMA }, 223#if !defined(CONFIG_PATA_TOSHIBA) && !defined(CONFIG_PATA_TOSHIBA_MODULE) 224 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, 225 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, 226 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), }, 227 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), }, 228#endif 229 /* Intel, IDE class device */ 230 { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 231 PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 232 .driver_data = ATA_GEN_INTEL_IDER }, 233 /* Must come last. If you add entries adjust this table appropriately */ 234 { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL), 235 .driver_data = ATA_GEN_CLASS_MATCH }, 236 { 0, }, 237}; 238 239static struct pci_driver ata_generic_pci_driver = { 240 .name = DRV_NAME, 241 .id_table = ata_generic, 242 .probe = ata_generic_init_one, 243 .remove = ata_pci_remove_one, 244#ifdef CONFIG_PM_SLEEP 245 .suspend = ata_pci_device_suspend, 246 .resume = ata_pci_device_resume, 247#endif 248}; 249 250module_pci_driver(ata_generic_pci_driver); 251 252MODULE_AUTHOR("Alan Cox"); 253MODULE_DESCRIPTION("low-level driver for generic ATA"); 254MODULE_LICENSE("GPL"); 255MODULE_DEVICE_TABLE(pci, ata_generic); 256MODULE_VERSION(DRV_VERSION); 257 258module_param(all_generic_ide, int, 0); 259