2 * ata_generic.c - Generic PATA/SATA controller driver.
3 * Copyright 2005 Red Hat Inc <alan@redhat.com>, all rights reserved.
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>
9 * May be copied or modified under the terms of the GNU General Public License
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
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>
28 #define DRV_NAME "ata_generic"
29 #define DRV_VERSION "0.2.10"
32 * A generic parallel ATA driver using libata
36 * generic_pre_reset - probe begin
39 * Set up cable type and use generic probe init
42 static int generic_pre_reset(struct ata_port *ap)
44 ap->cbl = ATA_CBL_PATA80;
45 return ata_std_prereset(ap);
50 * generic_error_handler - Probe specified port on PATA host controller
55 * None (inherited from caller).
59 static void generic_error_handler(struct ata_port *ap)
61 ata_bmdma_drive_eh(ap, generic_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
65 * generic_set_mode - mode setting
66 * @ap: interface to set up
67 * @unused: returned device on error
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
75 static int generic_set_mode(struct ata_port *ap, struct ata_device **unused)
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);
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;
97 dev->xfer_mode = XFER_PIO_0;
98 dev->xfer_shift = ATA_SHIFT_PIO;
99 dev->flags |= ATA_DFLAG_PIO;
106 static struct scsi_host_template generic_sht = {
107 .module = THIS_MODULE,
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,
126 static struct ata_port_operations generic_port_ops = {
127 .set_mode = generic_set_mode,
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,
136 .bmdma_setup = ata_bmdma_setup,
137 .bmdma_start = ata_bmdma_start,
138 .bmdma_stop = ata_bmdma_stop,
139 .bmdma_status = ata_bmdma_status,
141 .data_xfer = ata_data_xfer,
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,
148 .qc_prep = ata_qc_prep,
149 .qc_issue = ata_qc_issue_prot,
151 .irq_handler = ata_interrupt,
152 .irq_clear = ata_bmdma_irq_clear,
153 .irq_on = ata_irq_on,
154 .irq_ack = ata_irq_ack,
156 .port_start = ata_port_start,
159 static int all_generic_ide; /* Set to claim all devices */
162 * ata_generic_init - attach generic IDE
163 * @dev: PCI device found
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.
171 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
174 static struct ata_port_info info = {
176 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
180 .port_ops = &generic_port_ops
182 static struct ata_port_info *port_info[2] = { &info, &info };
184 /* Don't use the generic entry unless instructed to do so */
185 if (id->driver_data == 1 && all_generic_ide == 0)
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)))
194 if (dev->vendor == PCI_VENDOR_ID_OPTI &&
195 dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
196 (!(PCI_FUNC(dev->devfn) & 1)))
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))
205 if (dev->vendor == PCI_VENDOR_ID_AL)
206 ata_pci_clear_simplex(dev);
208 return ata_pci_init_one(dev, port_info, 2);
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},
228 static struct pci_driver ata_generic_pci_driver = {
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,
237 static int __init ata_generic_init(void)
239 return pci_register_driver(&ata_generic_pci_driver);
243 static void __exit ata_generic_exit(void)
245 pci_unregister_driver(&ata_generic_pci_driver);
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);
255 module_init(ata_generic_init);
256 module_exit(ata_generic_exit);
258 module_param(all_generic_ide, int, 0);