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authorJeff Garzik <jeff@garzik.org>2006-08-29 18:12:40 -0400
committerJeff Garzik <jeff@garzik.org>2006-08-29 18:12:40 -0400
commit669a5db411d85a14f86cd92bc16bf7ab5b8aa235 (patch)
tree8d4f9d63e18185695a4d97e1a3fa4e18b61c7345 /drivers/ata/ata_generic.c
parentb01e86fee6c821e4e003fd4e9f65453ac478a58e (diff)
[libata] Add a bunch of PATA drivers.
The vast majority of drivers and changes are from Alan Cox. Albert Lee contributed and maintains pata_pdc2027x. Adrian Bunk, Andrew Morton, and Tejun Heo contributed various minor fixes and updates. Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/ata_generic.c')
-rw-r--r--drivers/ata/ata_generic.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
new file mode 100644
index 000000000000..20b191dcf7ed
--- /dev/null
+++ b/drivers/ata/ata_generic.c
@@ -0,0 +1,252 @@
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 "0.2.6"
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
42static 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
59static 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 *
68 * Use a non standard set_mode function. We don't want to be tuned.
69 * The BIOS configured everything. Our job is not to fiddle. We
70 * read the dma enabled bits from the PCI configuration of the device
71 * and respect them.
72 */
73
74static void generic_set_mode(struct ata_port *ap)
75{
76 int dma_enabled = 0;
77 int i;
78
79 /* Bits 5 and 6 indicate if DMA is active on master/slave */
80 if (ap->ioaddr.bmdma_addr)
81 dma_enabled = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
82
83 for (i = 0; i < ATA_MAX_DEVICES; i++) {
84 struct ata_device *dev = &ap->device[i];
85 if (ata_dev_enabled(dev)) {
86 /* We don't really care */
87 dev->pio_mode = XFER_PIO_0;
88 dev->dma_mode = XFER_MW_DMA_0;
89 /* We do need the right mode information for DMA or PIO
90 and this comes from the current configuration flags */
91 if (dma_enabled & (1 << (5 + i))) {
92 dev->xfer_mode = XFER_MW_DMA_0;
93 dev->xfer_shift = ATA_SHIFT_MWDMA;
94 dev->flags &= ~ATA_DFLAG_PIO;
95 } else {
96 dev->xfer_mode = XFER_PIO_0;
97 dev->xfer_shift = ATA_SHIFT_PIO;
98 dev->flags |= ATA_DFLAG_PIO;
99 }
100 }
101 }
102}
103
104static struct scsi_host_template generic_sht = {
105 .module = THIS_MODULE,
106 .name = DRV_NAME,
107 .ioctl = ata_scsi_ioctl,
108 .queuecommand = ata_scsi_queuecmd,
109 .can_queue = ATA_DEF_QUEUE,
110 .this_id = ATA_SHT_THIS_ID,
111 .sg_tablesize = LIBATA_MAX_PRD,
112 .max_sectors = ATA_MAX_SECTORS,
113 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
114 .emulated = ATA_SHT_EMULATED,
115 .use_clustering = ATA_SHT_USE_CLUSTERING,
116 .proc_name = DRV_NAME,
117 .dma_boundary = ATA_DMA_BOUNDARY,
118 .slave_configure = ata_scsi_slave_config,
119 .bios_param = ata_std_bios_param,
120};
121
122static struct ata_port_operations generic_port_ops = {
123 .set_mode = generic_set_mode,
124
125 .port_disable = ata_port_disable,
126 .tf_load = ata_tf_load,
127 .tf_read = ata_tf_read,
128 .check_status = ata_check_status,
129 .exec_command = ata_exec_command,
130 .dev_select = ata_std_dev_select,
131
132 .bmdma_setup = ata_bmdma_setup,
133 .bmdma_start = ata_bmdma_start,
134 .bmdma_stop = ata_bmdma_stop,
135 .bmdma_status = ata_bmdma_status,
136
137 .data_xfer = ata_pio_data_xfer,
138
139 .freeze = ata_bmdma_freeze,
140 .thaw = ata_bmdma_thaw,
141 .error_handler = generic_error_handler,
142 .post_internal_cmd = ata_bmdma_post_internal_cmd,
143
144 .qc_prep = ata_qc_prep,
145 .qc_issue = ata_qc_issue_prot,
146 .eng_timeout = ata_eng_timeout,
147 .irq_handler = ata_interrupt,
148 .irq_clear = ata_bmdma_irq_clear,
149
150 .port_start = ata_port_start,
151 .port_stop = ata_port_stop,
152 .host_stop = ata_host_stop
153};
154
155static int all_generic_ide; /* Set to claim all devices */
156
157/**
158 * ata_generic_init - attach generic IDE
159 * @dev: PCI device found
160 * @id: match entry
161 *
162 * Called each time a matching IDE interface is found. We check if the
163 * interface is one we wish to claim and if so we perform any chip
164 * specific hacks then let the ATA layer do the heavy lifting.
165 */
166
167static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
168{
169 u16 command;
170 static struct ata_port_info info = {
171 .sht = &generic_sht,
172 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
173 .pio_mask = 0x1f,
174 .mwdma_mask = 0x07,
175 .udma_mask = 0x3f,
176 .port_ops = &generic_port_ops
177 };
178 static struct ata_port_info *port_info[2] = { &info, &info };
179
180 /* Don't use the generic entry unless instructed to do so */
181 if (id->driver_data == 1 && all_generic_ide == 0)
182 return -ENODEV;
183
184 /* Devices that need care */
185 if (dev->vendor == PCI_VENDOR_ID_UMC &&
186 dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
187 (!(PCI_FUNC(dev->devfn) & 1)))
188 return -ENODEV;
189
190 if (dev->vendor == PCI_VENDOR_ID_OPTI &&
191 dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
192 (!(PCI_FUNC(dev->devfn) & 1)))
193 return -ENODEV;
194
195 /* Don't re-enable devices in generic mode or we will break some
196 motherboards with disabled and unused IDE controllers */
197 pci_read_config_word(dev, PCI_COMMAND, &command);
198 if (!(command & PCI_COMMAND_IO))
199 return -ENODEV;
200
201 if (dev->vendor == PCI_VENDOR_ID_AL)
202 ata_pci_clear_simplex(dev);
203
204 return ata_pci_init_one(dev, port_info, 2);
205}
206
207static struct pci_device_id ata_generic[] = {
208 { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
209 { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
210 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), },
211 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), },
212 { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), },
213 { PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), },
214 { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), },
215 { PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), },
216 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), },
217 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
218 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), },
219 /* Must come last. If you add entries adjust this table appropriately */
220 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
221 { 0, },
222};
223
224static struct pci_driver ata_generic_pci_driver = {
225 .name = DRV_NAME,
226 .id_table = ata_generic,
227 .probe = ata_generic_init_one,
228 .remove = ata_pci_remove_one
229};
230
231static int __init ata_generic_init(void)
232{
233 return pci_module_init(&ata_generic_pci_driver);
234}
235
236
237static void __exit ata_generic_exit(void)
238{
239 pci_unregister_driver(&ata_generic_pci_driver);
240}
241
242
243MODULE_AUTHOR("Alan Cox");
244MODULE_DESCRIPTION("low-level driver for generic ATA");
245MODULE_LICENSE("GPL");
246MODULE_DEVICE_TABLE(pci, ata_generic);
247MODULE_VERSION(DRV_VERSION);
248
249module_init(ata_generic_init);
250module_exit(ata_generic_exit);
251
252module_param(all_generic_ide, int, 0);