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 "0.2.11" 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 = ioread8(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 ata_id_to_dma_mode(dev, XFER_MW_DMA_0); 94 dev->flags &= ~ATA_DFLAG_PIO; 95 } else { 96 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); 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 #ifdef CONFIG_PM 123 .resume = ata_scsi_device_resume, 124 .suspend = ata_scsi_device_suspend, 125 #endif 126 }; 127 128 static struct ata_port_operations generic_port_ops = { 129 .set_mode = generic_set_mode, 130 131 .port_disable = ata_port_disable, 132 .tf_load = ata_tf_load, 133 .tf_read = ata_tf_read, 134 .check_status = ata_check_status, 135 .exec_command = ata_exec_command, 136 .dev_select = ata_std_dev_select, 137 138 .bmdma_setup = ata_bmdma_setup, 139 .bmdma_start = ata_bmdma_start, 140 .bmdma_stop = ata_bmdma_stop, 141 .bmdma_status = ata_bmdma_status, 142 143 .data_xfer = ata_data_xfer, 144 145 .freeze = ata_bmdma_freeze, 146 .thaw = ata_bmdma_thaw, 147 .error_handler = generic_error_handler, 148 .post_internal_cmd = ata_bmdma_post_internal_cmd, 149 150 .qc_prep = ata_qc_prep, 151 .qc_issue = ata_qc_issue_prot, 152 153 .irq_handler = ata_interrupt, 154 .irq_clear = ata_bmdma_irq_clear, 155 .irq_on = ata_irq_on, 156 .irq_ack = ata_irq_ack, 157 158 .port_start = ata_port_start, 159 }; 160 161 static int all_generic_ide; /* Set to claim all devices */ 162 163 /** 164 * ata_generic_init - attach generic IDE 165 * @dev: PCI device found 166 * @id: match entry 167 * 168 * Called each time a matching IDE interface is found. We check if the 169 * interface is one we wish to claim and if so we perform any chip 170 * specific hacks then let the ATA layer do the heavy lifting. 171 */ 172 173 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id) 174 { 175 u16 command; 176 static struct ata_port_info info = { 177 .sht = &generic_sht, 178 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 179 .pio_mask = 0x1f, 180 .mwdma_mask = 0x07, 181 .udma_mask = 0x3f, 182 .port_ops = &generic_port_ops 183 }; 184 static struct ata_port_info *port_info[2] = { &info, &info }; 185 186 /* Don't use the generic entry unless instructed to do so */ 187 if (id->driver_data == 1 && all_generic_ide == 0) 188 return -ENODEV; 189 190 /* Devices that need care */ 191 if (dev->vendor == PCI_VENDOR_ID_UMC && 192 dev->device == PCI_DEVICE_ID_UMC_UM8886A && 193 (!(PCI_FUNC(dev->devfn) & 1))) 194 return -ENODEV; 195 196 if (dev->vendor == PCI_VENDOR_ID_OPTI && 197 dev->device == PCI_DEVICE_ID_OPTI_82C558 && 198 (!(PCI_FUNC(dev->devfn) & 1))) 199 return -ENODEV; 200 201 /* Don't re-enable devices in generic mode or we will break some 202 motherboards with disabled and unused IDE controllers */ 203 pci_read_config_word(dev, PCI_COMMAND, &command); 204 if (!(command & PCI_COMMAND_IO)) 205 return -ENODEV; 206 207 if (dev->vendor == PCI_VENDOR_ID_AL) 208 ata_pci_clear_simplex(dev); 209 210 return ata_pci_init_one(dev, port_info, 2); 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_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), }, 223 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, 224 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, 225 /* Must come last. If you add entries adjust this table appropriately */ 226 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1}, 227 { 0, }, 228 }; 229 230 static struct pci_driver ata_generic_pci_driver = { 231 .name = DRV_NAME, 232 .id_table = ata_generic, 233 .probe = ata_generic_init_one, 234 .remove = ata_pci_remove_one, 235 #ifdef CONFIG_PM 236 .suspend = ata_pci_device_suspend, 237 .resume = ata_pci_device_resume, 238 #endif 239 }; 240 241 static int __init ata_generic_init(void) 242 { 243 return pci_register_driver(&ata_generic_pci_driver); 244 } 245 246 247 static void __exit ata_generic_exit(void) 248 { 249 pci_unregister_driver(&ata_generic_pci_driver); 250 } 251 252 253 MODULE_AUTHOR("Alan Cox"); 254 MODULE_DESCRIPTION("low-level driver for generic ATA"); 255 MODULE_LICENSE("GPL"); 256 MODULE_DEVICE_TABLE(pci, ata_generic); 257 MODULE_VERSION(DRV_VERSION); 258 259 module_init(ata_generic_init); 260 module_exit(ata_generic_exit); 261 262 module_param(all_generic_ide, int, 0); 263