diff options
Diffstat (limited to 'drivers/ata/ata_generic.c')
-rw-r--r-- | drivers/ata/ata_generic.c | 252 |
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 00000000000..20b191dcf7e --- /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 | |||
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 | * | ||
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 | |||
74 | static 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 | |||
104 | static 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 | |||
122 | static 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 | |||
155 | static 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 | |||
167 | static 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 | |||
207 | static 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 | |||
224 | static 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 | |||
231 | static int __init ata_generic_init(void) | ||
232 | { | ||
233 | return pci_module_init(&ata_generic_pci_driver); | ||
234 | } | ||
235 | |||
236 | |||
237 | static void __exit ata_generic_exit(void) | ||
238 | { | ||
239 | pci_unregister_driver(&ata_generic_pci_driver); | ||
240 | } | ||
241 | |||
242 | |||
243 | MODULE_AUTHOR("Alan Cox"); | ||
244 | MODULE_DESCRIPTION("low-level driver for generic ATA"); | ||
245 | MODULE_LICENSE("GPL"); | ||
246 | MODULE_DEVICE_TABLE(pci, ata_generic); | ||
247 | MODULE_VERSION(DRV_VERSION); | ||
248 | |||
249 | module_init(ata_generic_init); | ||
250 | module_exit(ata_generic_exit); | ||
251 | |||
252 | module_param(all_generic_ide, int, 0); | ||