1 /* 2 * ata_generic.c - Generic PATA/SATA controller driver. 3 * Copyright 2005 Red Hat Inc <alan@redhat.com>, 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 "0.2.10" 30 31 /* 32 * A generic parallel ATA driver using libata 33 */ 34 35 /** 36 * generic_pre_reset - probe begin 37 * @ap: ATA port 38 * 39 * Set up cable type and use generic probe init 40 */ 41 42 static int generic_pre_reset(struct ata_port *ap) 43 { 44 ap->cbl = ATA_CBL_PATA80; 45 return ata_std_prereset(ap); 46 } 47 48 49 /** 50 * generic_error_handler - Probe specified port on PATA host controller 51 * @ap: Port to probe 52 * @classes: 53 * 54 * LOCKING: 55 * None (inherited from caller). 56 */ 57 58 59 static void generic_error_handler(struct ata_port *ap) 60 { 61 ata_bmdma_drive_eh(ap, generic_pre_reset, ata_std_softreset, NULL, ata_std_postreset); 62 } 63 64 /** 65 * generic_set_mode - mode setting 66 * @ap: interface to set up 67 * @unused: returned device on error 68 * 69 * Use a non standard set_mode function. We don't want to be tuned. 70 * The BIOS configured everything. Our job is not to fiddle. We 71 * read the dma enabled bits from the PCI configuration of the device 72 * and respect them. 73 */ 74 75 static int generic_set_mode(struct ata_port *ap, struct ata_device **unused) 76 { 77 int dma_enabled = 0; 78 int i; 79 80 /* Bits 5 and 6 indicate if DMA is active on master/slave */ 81 if (ap->ioaddr.bmdma_addr) 82 dma_enabled = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); 83 84 for (i = 0; i < ATA_MAX_DEVICES; i++) { 85 struct ata_device *dev = &ap->device[i]; 86 if (ata_dev_ready(dev)) { 87 /* We don't really care */ 88 dev->pio_mode = XFER_PIO_0; 89 dev->dma_mode = XFER_MW_DMA_0; 90 /* We do need the right mode information for DMA or PIO 91 and this comes from the current configuration flags */ 92 if (dma_enabled & (1 << (5 + i))) { 93 dev->xfer_mode = XFER_MW_DMA_0; 94 dev->xfer_shift = ATA_SHIFT_MWDMA; 95 dev->flags &= ~ATA_DFLAG_PIO; 96 } else { 97 dev->xfer_mode = XFER_PIO_0; 98 dev->xfer_shift = ATA_SHIFT_PIO; 99 dev->flags |= ATA_DFLAG_PIO; 100 } 101 } 102 } 103 return 0; 104 } 105 106 static struct scsi_host_template generic_sht = { 107 .module = THIS_MODULE, 108 .name = DRV_NAME, 109 .ioctl = ata_scsi_ioctl, 110 .queuecommand = ata_scsi_queuecmd, 111 .can_queue = ATA_DEF_QUEUE, 112 .this_id = ATA_SHT_THIS_ID, 113 .sg_tablesize = LIBATA_MAX_PRD, 114 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 115 .emulated = ATA_SHT_EMULATED, 116 .use_clustering = ATA_SHT_USE_CLUSTERING, 117 .proc_name = DRV_NAME, 118 .dma_boundary = ATA_DMA_BOUNDARY, 119 .slave_configure = ata_scsi_slave_config, 120 .slave_destroy = ata_scsi_slave_destroy, 121 .bios_param = ata_std_bios_param, 122 .resume = ata_scsi_device_resume, 123 .suspend = ata_scsi_device_suspend, 124 }; 125 126 static struct ata_port_operations generic_port_ops = { 127 .set_mode = generic_set_mode, 128 129 .port_disable = ata_port_disable, 130 .tf_load = ata_tf_load, 131 .tf_read = ata_tf_read, 132 .check_status = ata_check_status, 133 .exec_command = ata_exec_command, 134 .dev_select = ata_std_dev_select, 135 136 .bmdma_setup = ata_bmdma_setup, 137 .bmdma_start = ata_bmdma_start, 138 .bmdma_stop = ata_bmdma_stop, 139 .bmdma_status = ata_bmdma_status, 140 141 .data_xfer = ata_pio_data_xfer, 142 143 .freeze = ata_bmdma_freeze, 144 .thaw = ata_bmdma_thaw, 145 .error_handler = generic_error_handler, 146 .post_internal_cmd = ata_bmdma_post_internal_cmd, 147 148 .qc_prep = ata_qc_prep, 149 .qc_issue = ata_qc_issue_prot, 150 151 .irq_handler = ata_interrupt, 152 .irq_clear = ata_bmdma_irq_clear, 153 154 .port_start = ata_port_start, 155 .port_stop = ata_port_stop, 156 .host_stop = ata_host_stop 157 }; 158 159 static int all_generic_ide; /* Set to claim all devices */ 160 161 /** 162 * ata_generic_init - attach generic IDE 163 * @dev: PCI device found 164 * @id: match entry 165 * 166 * Called each time a matching IDE interface is found. We check if the 167 * interface is one we wish to claim and if so we perform any chip 168 * specific hacks then let the ATA layer do the heavy lifting. 169 */ 170 171 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id) 172 { 173 u16 command; 174 static struct ata_port_info info = { 175 .sht = &generic_sht, 176 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 177 .pio_mask = 0x1f, 178 .mwdma_mask = 0x07, 179 .udma_mask = 0x3f, 180 .port_ops = &generic_port_ops 181 }; 182 static struct ata_port_info *port_info[2] = { &info, &info }; 183 184 /* Don't use the generic entry unless instructed to do so */ 185 if (id->driver_data == 1 && all_generic_ide == 0) 186 return -ENODEV; 187 188 /* Devices that need care */ 189 if (dev->vendor == PCI_VENDOR_ID_UMC && 190 dev->device == PCI_DEVICE_ID_UMC_UM8886A && 191 (!(PCI_FUNC(dev->devfn) & 1))) 192 return -ENODEV; 193 194 if (dev->vendor == PCI_VENDOR_ID_OPTI && 195 dev->device == PCI_DEVICE_ID_OPTI_82C558 && 196 (!(PCI_FUNC(dev->devfn) & 1))) 197 return -ENODEV; 198 199 /* Don't re-enable devices in generic mode or we will break some 200 motherboards with disabled and unused IDE controllers */ 201 pci_read_config_word(dev, PCI_COMMAND, &command); 202 if (!(command & PCI_COMMAND_IO)) 203 return -ENODEV; 204 205 if (dev->vendor == PCI_VENDOR_ID_AL) 206 ata_pci_clear_simplex(dev); 207 208 return ata_pci_init_one(dev, port_info, 2); 209 } 210 211 static struct pci_device_id ata_generic[] = { 212 { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), }, 213 { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), }, 214 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), }, 215 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), }, 216 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), }, 217 { PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), }, 218 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), }, 219 { PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), }, 220 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), }, 221 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, 222 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, 223 /* Must come last. If you add entries adjust this table appropriately */ 224 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1}, 225 { 0, }, 226 }; 227 228 static struct pci_driver ata_generic_pci_driver = { 229 .name = DRV_NAME, 230 .id_table = ata_generic, 231 .probe = ata_generic_init_one, 232 .remove = ata_pci_remove_one, 233 .suspend = ata_pci_device_suspend, 234 .resume = ata_pci_device_resume, 235 }; 236 237 static int __init ata_generic_init(void) 238 { 239 return pci_register_driver(&ata_generic_pci_driver); 240 } 241 242 243 static void __exit ata_generic_exit(void) 244 { 245 pci_unregister_driver(&ata_generic_pci_driver); 246 } 247 248 249 MODULE_AUTHOR("Alan Cox"); 250 MODULE_DESCRIPTION("low-level driver for generic ATA"); 251 MODULE_LICENSE("GPL"); 252 MODULE_DEVICE_TABLE(pci, ata_generic); 253 MODULE_VERSION(DRV_VERSION); 254 255 module_init(ata_generic_init); 256 module_exit(ata_generic_exit); 257 258 module_param(all_generic_ide, int, 0); 259