2 * pata_atiixp.c - ATI PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
8 * linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004
10 * Copyright (C) 2003 ATI Inc. <hyu@ati.com>
11 * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/pci.h>
18 #include <linux/init.h>
19 #include <linux/blkdev.h>
20 #include <linux/delay.h>
21 #include <scsi/scsi_host.h>
22 #include <linux/libata.h>
24 #define DRV_NAME "pata_atiixp"
25 #define DRV_VERSION "0.4.3"
28 ATIIXP_IDE_PIO_TIMING
= 0x40,
29 ATIIXP_IDE_MWDMA_TIMING
= 0x44,
30 ATIIXP_IDE_PIO_CONTROL
= 0x48,
31 ATIIXP_IDE_PIO_MODE
= 0x4a,
32 ATIIXP_IDE_UDMA_CONTROL
= 0x54,
33 ATIIXP_IDE_UDMA_MODE
= 0x56
36 static int atiixp_pre_reset(struct ata_port
*ap
)
38 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
39 static struct pci_bits atiixp_enable_bits
[] = {
40 { 0x48, 1, 0x01, 0x00 },
41 { 0x48, 1, 0x08, 0x00 }
44 if (!pci_test_config_bits(pdev
, &atiixp_enable_bits
[ap
->port_no
]))
47 ap
->cbl
= ATA_CBL_PATA80
;
48 return ata_std_prereset(ap
);
51 static void atiixp_error_handler(struct ata_port
*ap
)
53 ata_bmdma_drive_eh(ap
, atiixp_pre_reset
, ata_std_softreset
, NULL
, ata_std_postreset
);
57 * atiixp_set_pio_timing - set initial PIO mode data
61 * Called by both the pio and dma setup functions to set the controller
62 * timings for PIO transfers. We must load both the mode number and
63 * timing values into the controller.
66 static void atiixp_set_pio_timing(struct ata_port
*ap
, struct ata_device
*adev
, int pio
)
68 static u8 pio_timings
[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
70 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
71 int dn
= 2 * ap
->port_no
+ adev
->devno
;
73 /* Check this is correct - the order is odd in both drivers */
74 int timing_shift
= (16 * ap
->port_no
) + 8 * (adev
->devno
^ 1);
75 u16 pio_mode_data
, pio_timing_data
;
77 pci_read_config_word(pdev
, ATIIXP_IDE_PIO_MODE
, &pio_mode_data
);
78 pio_mode_data
&= ~(0x7 << (4 * dn
));
79 pio_mode_data
|= pio
<< (4 * dn
);
80 pci_write_config_word(pdev
, ATIIXP_IDE_PIO_MODE
, pio_mode_data
);
82 pci_read_config_word(pdev
, ATIIXP_IDE_PIO_TIMING
, &pio_timing_data
);
83 pio_mode_data
&= ~(0xFF << timing_shift
);
84 pio_mode_data
|= (pio_timings
[pio
] << timing_shift
);
85 pci_write_config_word(pdev
, ATIIXP_IDE_PIO_TIMING
, pio_timing_data
);
89 * atiixp_set_piomode - set initial PIO mode data
93 * Called to do the PIO mode setup. We use a shared helper for this
94 * as the DMA setup must also adjust the PIO timing information.
97 static void atiixp_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
99 atiixp_set_pio_timing(ap
, adev
, adev
->pio_mode
- XFER_PIO_0
);
103 * atiixp_set_dmamode - set initial DMA mode data
107 * Called to do the DMA mode setup. We use timing tables for most
108 * modes but must tune an appropriate PIO mode to match.
111 static void atiixp_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
113 static u8 mwdma_timings
[5] = { 0x77, 0x21, 0x20 };
115 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
116 int dma
= adev
->dma_mode
;
117 int dn
= 2 * ap
->port_no
+ adev
->devno
;
120 if (adev
->dma_mode
>= XFER_UDMA_0
) {
125 pci_read_config_word(pdev
, ATIIXP_IDE_UDMA_MODE
, &udma_mode_data
);
126 udma_mode_data
&= ~(0x7 << (4 * dn
));
127 udma_mode_data
|= dma
<< (4 * dn
);
128 pci_write_config_word(pdev
, ATIIXP_IDE_UDMA_MODE
, udma_mode_data
);
130 u16 mwdma_timing_data
;
131 /* Check this is correct - the order is odd in both drivers */
132 int timing_shift
= (16 * ap
->port_no
) + 8 * (adev
->devno
^ 1);
134 dma
-= XFER_MW_DMA_0
;
136 pci_read_config_word(pdev
, ATIIXP_IDE_MWDMA_TIMING
, &mwdma_timing_data
);
137 mwdma_timing_data
&= ~(0xFF << timing_shift
);
138 mwdma_timing_data
|= (mwdma_timings
[dma
] << timing_shift
);
139 pci_write_config_word(pdev
, ATIIXP_IDE_MWDMA_TIMING
, mwdma_timing_data
);
142 * We must now look at the PIO mode situation. We may need to
143 * adjust the PIO mode to keep the timings acceptable
145 if (adev
->dma_mode
>= XFER_MW_DMA_2
)
147 else if (adev
->dma_mode
== XFER_MW_DMA_1
)
149 else if (adev
->dma_mode
== XFER_MW_DMA_0
)
153 if (adev
->pio_mode
!= wanted_pio
)
154 atiixp_set_pio_timing(ap
, adev
, wanted_pio
);
158 * atiixp_bmdma_start - DMA start callback
159 * @qc: Command in progress
161 * When DMA begins we need to ensure that the UDMA control
162 * register for the channel is correctly set.
165 static void atiixp_bmdma_start(struct ata_queued_cmd
*qc
)
167 struct ata_port
*ap
= qc
->ap
;
168 struct ata_device
*adev
= qc
->dev
;
170 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
171 int dn
= (2 * ap
->port_no
) + adev
->devno
;
174 pci_read_config_word(pdev
, ATIIXP_IDE_UDMA_CONTROL
, &tmp16
);
175 if (adev
->dma_mode
>= XFER_UDMA_0
)
179 pci_write_config_word(pdev
, ATIIXP_IDE_UDMA_CONTROL
, tmp16
);
184 * atiixp_dma_stop - DMA stop callback
185 * @qc: Command in progress
187 * DMA has completed. Clear the UDMA flag as the next operations will
188 * be PIO ones not UDMA data transfer.
191 static void atiixp_bmdma_stop(struct ata_queued_cmd
*qc
)
193 struct ata_port
*ap
= qc
->ap
;
194 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
195 int dn
= (2 * ap
->port_no
) + qc
->dev
->devno
;
198 pci_read_config_word(pdev
, ATIIXP_IDE_UDMA_CONTROL
, &tmp16
);
200 pci_write_config_word(pdev
, ATIIXP_IDE_UDMA_CONTROL
, tmp16
);
204 static struct scsi_host_template atiixp_sht
= {
205 .module
= THIS_MODULE
,
207 .ioctl
= ata_scsi_ioctl
,
208 .queuecommand
= ata_scsi_queuecmd
,
209 .can_queue
= ATA_DEF_QUEUE
,
210 .this_id
= ATA_SHT_THIS_ID
,
211 .sg_tablesize
= LIBATA_MAX_PRD
,
212 .max_sectors
= ATA_MAX_SECTORS
,
213 .cmd_per_lun
= ATA_SHT_CMD_PER_LUN
,
214 .emulated
= ATA_SHT_EMULATED
,
215 .use_clustering
= ATA_SHT_USE_CLUSTERING
,
216 .proc_name
= DRV_NAME
,
217 .dma_boundary
= ATA_DMA_BOUNDARY
,
218 .slave_configure
= ata_scsi_slave_config
,
219 .bios_param
= ata_std_bios_param
,
222 static struct ata_port_operations atiixp_port_ops
= {
223 .port_disable
= ata_port_disable
,
224 .set_piomode
= atiixp_set_piomode
,
225 .set_dmamode
= atiixp_set_dmamode
,
226 .mode_filter
= ata_pci_default_filter
,
227 .tf_load
= ata_tf_load
,
228 .tf_read
= ata_tf_read
,
229 .check_status
= ata_check_status
,
230 .exec_command
= ata_exec_command
,
231 .dev_select
= ata_std_dev_select
,
233 .freeze
= ata_bmdma_freeze
,
234 .thaw
= ata_bmdma_thaw
,
235 .error_handler
= atiixp_error_handler
,
236 .post_internal_cmd
= ata_bmdma_post_internal_cmd
,
238 .bmdma_setup
= ata_bmdma_setup
,
239 .bmdma_start
= atiixp_bmdma_start
,
240 .bmdma_stop
= atiixp_bmdma_stop
,
241 .bmdma_status
= ata_bmdma_status
,
243 .qc_prep
= ata_qc_prep
,
244 .qc_issue
= ata_qc_issue_prot
,
246 .data_xfer
= ata_pio_data_xfer
,
248 .irq_handler
= ata_interrupt
,
249 .irq_clear
= ata_bmdma_irq_clear
,
251 .port_start
= ata_port_start
,
252 .port_stop
= ata_port_stop
,
253 .host_stop
= ata_host_stop
256 static int atiixp_init_one(struct pci_dev
*dev
, const struct pci_device_id
*id
)
258 static struct ata_port_info info
= {
260 .flags
= ATA_FLAG_SLAVE_POSS
| ATA_FLAG_SRST
,
262 .mwdma_mask
= 0x06, /* No MWDMA0 support */
264 .port_ops
= &atiixp_port_ops
266 static struct ata_port_info
*port_info
[2] = { &info
, &info
};
267 return ata_pci_init_one(dev
, port_info
, 2);
270 static const struct pci_device_id atiixp
[] = {
271 { PCI_VDEVICE(ATI
, PCI_DEVICE_ID_ATI_IXP200_IDE
), },
272 { PCI_VDEVICE(ATI
, PCI_DEVICE_ID_ATI_IXP300_IDE
), },
273 { PCI_VDEVICE(ATI
, PCI_DEVICE_ID_ATI_IXP400_IDE
), },
274 { PCI_VDEVICE(ATI
, PCI_DEVICE_ID_ATI_IXP600_IDE
), },
279 static struct pci_driver atiixp_pci_driver
= {
282 .probe
= atiixp_init_one
,
283 .remove
= ata_pci_remove_one
286 static int __init
atiixp_init(void)
288 return pci_register_driver(&atiixp_pci_driver
);
292 static void __exit
atiixp_exit(void)
294 pci_unregister_driver(&atiixp_pci_driver
);
297 MODULE_AUTHOR("Alan Cox");
298 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
299 MODULE_LICENSE("GPL");
300 MODULE_DEVICE_TABLE(pci
, atiixp
);
301 MODULE_VERSION(DRV_VERSION
);
303 module_init(atiixp_init
);
304 module_exit(atiixp_exit
);