Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame] | 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 | |
| 34 | enum { |
| 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 | |
| 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_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 | |
| 98 | static struct scsi_host_template generic_sht = { |
| 99 | ATA_BMDMA_SHT(DRV_NAME), |
| 100 | }; |
| 101 | |
| 102 | static 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 | |
| 108 | static 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 | |
| 124 | static 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 - 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 | |
| 163 | static 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 | |
| 212 | static 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 | |
| 239 | static 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 | |
| 250 | module_pci_driver(ata_generic_pci_driver); |
| 251 | |
| 252 | MODULE_AUTHOR("Alan Cox"); |
| 253 | MODULE_DESCRIPTION("low-level driver for generic ATA"); |
| 254 | MODULE_LICENSE("GPL"); |
| 255 | MODULE_DEVICE_TABLE(pci, ata_generic); |
| 256 | MODULE_VERSION(DRV_VERSION); |
| 257 | |
| 258 | module_param(all_generic_ide, int, 0); |