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 "0.2.12" 30 31 /* 32 * A generic parallel ATA driver using libata 33 */ 34 35 /** 36 * generic_set_mode - mode setting 37 * @ap: interface to set up 38 * @unused: returned device on error 39 * 40 * Use a non standard set_mode function. We don't want to be tuned. 41 * The BIOS configured everything. Our job is not to fiddle. We 42 * read the dma enabled bits from the PCI configuration of the device 43 * and respect them. 44 */ 45 46 static int generic_set_mode(struct ata_port *ap, struct ata_device **unused) 47 { 48 int dma_enabled = 0; 49 int i; 50 51 /* Bits 5 and 6 indicate if DMA is active on master/slave */ 52 if (ap->ioaddr.bmdma_addr) 53 dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 54 55 for (i = 0; i < ATA_MAX_DEVICES; i++) { 56 struct ata_device *dev = &ap->device[i]; 57 if (ata_dev_enabled(dev)) { 58 /* We don't really care */ 59 dev->pio_mode = XFER_PIO_0; 60 dev->dma_mode = XFER_MW_DMA_0; 61 /* We do need the right mode information for DMA or PIO 62 and this comes from the current configuration flags */ 63 if (dma_enabled & (1 << (5 + i))) { 64 ata_id_to_dma_mode(dev, XFER_MW_DMA_0); 65 dev->flags &= ~ATA_DFLAG_PIO; 66 } else { 67 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); 68 dev->xfer_mode = XFER_PIO_0; 69 dev->xfer_shift = ATA_SHIFT_PIO; 70 dev->flags |= ATA_DFLAG_PIO; 71 } 72 } 73 } 74 return 0; 75 } 76 77 static struct scsi_host_template generic_sht = { 78 .module = THIS_MODULE, 79 .name = DRV_NAME, 80 .ioctl = ata_scsi_ioctl, 81 .queuecommand = ata_scsi_queuecmd, 82 .can_queue = ATA_DEF_QUEUE, 83 .this_id = ATA_SHT_THIS_ID, 84 .sg_tablesize = LIBATA_MAX_PRD, 85 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 86 .emulated = ATA_SHT_EMULATED, 87 .use_clustering = ATA_SHT_USE_CLUSTERING, 88 .proc_name = DRV_NAME, 89 .dma_boundary = ATA_DMA_BOUNDARY, 90 .slave_configure = ata_scsi_slave_config, 91 .slave_destroy = ata_scsi_slave_destroy, 92 .bios_param = ata_std_bios_param, 93 }; 94 95 static struct ata_port_operations generic_port_ops = { 96 .set_mode = generic_set_mode, 97 98 .port_disable = ata_port_disable, 99 .tf_load = ata_tf_load, 100 .tf_read = ata_tf_read, 101 .check_status = ata_check_status, 102 .exec_command = ata_exec_command, 103 .dev_select = ata_std_dev_select, 104 105 .bmdma_setup = ata_bmdma_setup, 106 .bmdma_start = ata_bmdma_start, 107 .bmdma_stop = ata_bmdma_stop, 108 .bmdma_status = ata_bmdma_status, 109 110 .data_xfer = ata_data_xfer, 111 112 .freeze = ata_bmdma_freeze, 113 .thaw = ata_bmdma_thaw, 114 .error_handler = ata_bmdma_error_handler, 115 .post_internal_cmd = ata_bmdma_post_internal_cmd, 116 .cable_detect = ata_cable_unknown, 117 118 .qc_prep = ata_qc_prep, 119 .qc_issue = ata_qc_issue_prot, 120 121 .irq_handler = ata_interrupt, 122 .irq_clear = ata_bmdma_irq_clear, 123 .irq_on = ata_irq_on, 124 .irq_ack = ata_irq_ack, 125 126 .port_start = ata_port_start, 127 }; 128 129 static int all_generic_ide; /* Set to claim all devices */ 130 131 /** 132 * ata_generic_init - attach generic IDE 133 * @dev: PCI device found 134 * @id: match entry 135 * 136 * Called each time a matching IDE interface is found. We check if the 137 * interface is one we wish to claim and if so we perform any chip 138 * specific hacks then let the ATA layer do the heavy lifting. 139 */ 140 141 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id) 142 { 143 u16 command; 144 static const struct ata_port_info info = { 145 .sht = &generic_sht, 146 .flags = ATA_FLAG_SLAVE_POSS, 147 .pio_mask = 0x1f, 148 .mwdma_mask = 0x07, 149 .udma_mask = ATA_UDMA5, 150 .port_ops = &generic_port_ops 151 }; 152 const struct ata_port_info *ppi[] = { &info, NULL }; 153 154 /* Don't use the generic entry unless instructed to do so */ 155 if (id->driver_data == 1 && all_generic_ide == 0) 156 return -ENODEV; 157 158 /* Devices that need care */ 159 if (dev->vendor == PCI_VENDOR_ID_UMC && 160 dev->device == PCI_DEVICE_ID_UMC_UM8886A && 161 (!(PCI_FUNC(dev->devfn) & 1))) 162 return -ENODEV; 163 164 if (dev->vendor == PCI_VENDOR_ID_OPTI && 165 dev->device == PCI_DEVICE_ID_OPTI_82C558 && 166 (!(PCI_FUNC(dev->devfn) & 1))) 167 return -ENODEV; 168 169 /* Don't re-enable devices in generic mode or we will break some 170 motherboards with disabled and unused IDE controllers */ 171 pci_read_config_word(dev, PCI_COMMAND, &command); 172 if (!(command & PCI_COMMAND_IO)) 173 return -ENODEV; 174 175 if (dev->vendor == PCI_VENDOR_ID_AL) 176 ata_pci_clear_simplex(dev); 177 178 return ata_pci_init_one(dev, ppi); 179 } 180 181 static struct pci_device_id ata_generic[] = { 182 { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), }, 183 { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), }, 184 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), }, 185 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), }, 186 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), }, 187 { PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), }, 188 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), }, 189 { PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), }, 190 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), }, 191 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, 192 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, 193 /* Must come last. If you add entries adjust this table appropriately */ 194 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1}, 195 { 0, }, 196 }; 197 198 static struct pci_driver ata_generic_pci_driver = { 199 .name = DRV_NAME, 200 .id_table = ata_generic, 201 .probe = ata_generic_init_one, 202 .remove = ata_pci_remove_one, 203 #ifdef CONFIG_PM 204 .suspend = ata_pci_device_suspend, 205 .resume = ata_pci_device_resume, 206 #endif 207 }; 208 209 static int __init ata_generic_init(void) 210 { 211 return pci_register_driver(&ata_generic_pci_driver); 212 } 213 214 215 static void __exit ata_generic_exit(void) 216 { 217 pci_unregister_driver(&ata_generic_pci_driver); 218 } 219 220 221 MODULE_AUTHOR("Alan Cox"); 222 MODULE_DESCRIPTION("low-level driver for generic ATA"); 223 MODULE_LICENSE("GPL"); 224 MODULE_DEVICE_TABLE(pci, ata_generic); 225 MODULE_VERSION(DRV_VERSION); 226 227 module_init(ata_generic_init); 228 module_exit(ata_generic_exit); 229 230 module_param(all_generic_ide, int, 0); 231