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 "0.4.2"
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
])) {
46 printk(KERN_INFO
"ata%u: port disabled. ignoring.\n", ap
->id
);
49 ap
->cbl
= ATA_CBL_PATA80
;
50 return ata_std_prereset(ap
);
53 static void atiixp_error_handler(struct ata_port
*ap
)
55 ata_bmdma_drive_eh(ap
, atiixp_pre_reset
, ata_std_softreset
, NULL
, ata_std_postreset
);
59 * atiixp_set_pio_timing - set initial PIO mode data
63 * Called by both the pio and dma setup functions to set the controller
64 * timings for PIO transfers. We must load both the mode number and
65 * timing values into the controller.
68 static void atiixp_set_pio_timing(struct ata_port
*ap
, struct ata_device
*adev
, int pio
)
70 static u8 pio_timings
[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
72 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
73 int dn
= 2 * ap
->port_no
+ adev
->devno
;
75 /* Check this is correct - the order is odd in both drivers */
76 int timing_shift
= (16 * ap
->port_no
) + 8 * (adev
->devno
^ 1);
77 u16 pio_mode_data
, pio_timing_data
;
79 pci_read_config_word(pdev
, ATIIXP_IDE_PIO_MODE
, &pio_mode_data
);
80 pio_mode_data
&= ~(0x7 << (4 * dn
));
81 pio_mode_data
|= pio
<< (4 * dn
);
82 pci_write_config_word(pdev
, ATIIXP_IDE_PIO_MODE
, pio_mode_data
);
84 pci_read_config_word(pdev
, ATIIXP_IDE_PIO_TIMING
, &pio_timing_data
);
85 pio_mode_data
&= ~(0xFF << timing_shift
);
86 pio_mode_data
|= (pio_timings
[pio
] << timing_shift
);
87 pci_write_config_word(pdev
, ATIIXP_IDE_PIO_TIMING
, pio_timing_data
);
91 * atiixp_set_piomode - set initial PIO mode data
95 * Called to do the PIO mode setup. We use a shared helper for this
96 * as the DMA setup must also adjust the PIO timing information.
99 static void atiixp_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
101 atiixp_set_pio_timing(ap
, adev
, adev
->pio_mode
- XFER_PIO_0
);
105 * atiixp_set_dmamode - set initial DMA mode data
109 * Called to do the DMA mode setup. We use timing tables for most
110 * modes but must tune an appropriate PIO mode to match.
113 static void atiixp_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
115 static u8 mwdma_timings
[5] = { 0x77, 0x21, 0x20 };
117 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
118 int dma
= adev
->dma_mode
;
119 int dn
= 2 * ap
->port_no
+ adev
->devno
;
122 if (adev
->dma_mode
>= XFER_UDMA_0
) {
127 pci_read_config_word(pdev
, ATIIXP_IDE_UDMA_MODE
, &udma_mode_data
);
128 udma_mode_data
&= ~(0x7 << (4 * dn
));
129 udma_mode_data
|= dma
<< (4 * dn
);
130 pci_write_config_word(pdev
, ATIIXP_IDE_UDMA_MODE
, udma_mode_data
);
132 u16 mwdma_timing_data
;
133 /* Check this is correct - the order is odd in both drivers */
134 int timing_shift
= (16 * ap
->port_no
) + 8 * (adev
->devno
^ 1);
136 dma
-= XFER_MW_DMA_0
;
138 pci_read_config_word(pdev
, ATIIXP_IDE_MWDMA_TIMING
, &mwdma_timing_data
);
139 mwdma_timing_data
&= ~(0xFF << timing_shift
);
140 mwdma_timing_data
|= (mwdma_timings
[dma
] << timing_shift
);
141 pci_write_config_word(pdev
, ATIIXP_IDE_MWDMA_TIMING
, mwdma_timing_data
);
144 * We must now look at the PIO mode situation. We may need to
145 * adjust the PIO mode to keep the timings acceptable
147 if (adev
->dma_mode
>= XFER_MW_DMA_2
)
149 else if (adev
->dma_mode
== XFER_MW_DMA_1
)
151 else if (adev
->dma_mode
== XFER_MW_DMA_0
)
155 if (adev
->pio_mode
!= wanted_pio
)
156 atiixp_set_pio_timing(ap
, adev
, wanted_pio
);
160 * atiixp_bmdma_start - DMA start callback
161 * @qc: Command in progress
163 * When DMA begins we need to ensure that the UDMA control
164 * register for the channel is correctly set.
167 static void atiixp_bmdma_start(struct ata_queued_cmd
*qc
)
169 struct ata_port
*ap
= qc
->ap
;
170 struct ata_device
*adev
= qc
->dev
;
172 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
173 int dn
= (2 * ap
->port_no
) + adev
->devno
;
176 pci_read_config_word(pdev
, ATIIXP_IDE_UDMA_CONTROL
, &tmp16
);
177 if (adev
->dma_mode
>= XFER_UDMA_0
)
181 pci_write_config_word(pdev
, ATIIXP_IDE_UDMA_CONTROL
, tmp16
);
186 * atiixp_dma_stop - DMA stop callback
187 * @qc: Command in progress
189 * DMA has completed. Clear the UDMA flag as the next operations will
190 * be PIO ones not UDMA data transfer.
193 static void atiixp_bmdma_stop(struct ata_queued_cmd
*qc
)
195 struct ata_port
*ap
= qc
->ap
;
196 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
197 int dn
= (2 * ap
->port_no
) + qc
->dev
->devno
;
200 pci_read_config_word(pdev
, ATIIXP_IDE_UDMA_CONTROL
, &tmp16
);
202 pci_write_config_word(pdev
, ATIIXP_IDE_UDMA_CONTROL
, tmp16
);
206 static struct scsi_host_template atiixp_sht
= {
207 .module
= THIS_MODULE
,
209 .ioctl
= ata_scsi_ioctl
,
210 .queuecommand
= ata_scsi_queuecmd
,
211 .can_queue
= ATA_DEF_QUEUE
,
212 .this_id
= ATA_SHT_THIS_ID
,
213 .sg_tablesize
= LIBATA_MAX_PRD
,
214 .max_sectors
= ATA_MAX_SECTORS
,
215 .cmd_per_lun
= ATA_SHT_CMD_PER_LUN
,
216 .emulated
= ATA_SHT_EMULATED
,
217 .use_clustering
= ATA_SHT_USE_CLUSTERING
,
218 .proc_name
= DRV_NAME
,
219 .dma_boundary
= ATA_DMA_BOUNDARY
,
220 .slave_configure
= ata_scsi_slave_config
,
221 .bios_param
= ata_std_bios_param
,
224 static struct ata_port_operations atiixp_port_ops
= {
225 .port_disable
= ata_port_disable
,
226 .set_piomode
= atiixp_set_piomode
,
227 .set_dmamode
= atiixp_set_dmamode
,
228 .mode_filter
= ata_pci_default_filter
,
229 .tf_load
= ata_tf_load
,
230 .tf_read
= ata_tf_read
,
231 .check_status
= ata_check_status
,
232 .exec_command
= ata_exec_command
,
233 .dev_select
= ata_std_dev_select
,
235 .freeze
= ata_bmdma_freeze
,
236 .thaw
= ata_bmdma_thaw
,
237 .error_handler
= atiixp_error_handler
,
238 .post_internal_cmd
= ata_bmdma_post_internal_cmd
,
240 .bmdma_setup
= ata_bmdma_setup
,
241 .bmdma_start
= atiixp_bmdma_start
,
242 .bmdma_stop
= atiixp_bmdma_stop
,
243 .bmdma_status
= ata_bmdma_status
,
245 .qc_prep
= ata_qc_prep
,
246 .qc_issue
= ata_qc_issue_prot
,
247 .eng_timeout
= ata_eng_timeout
,
248 .data_xfer
= ata_pio_data_xfer
,
250 .irq_handler
= ata_interrupt
,
251 .irq_clear
= ata_bmdma_irq_clear
,
253 .port_start
= ata_port_start
,
254 .port_stop
= ata_port_stop
,
255 .host_stop
= ata_host_stop
258 static int atiixp_init_one(struct pci_dev
*dev
, const struct pci_device_id
*id
)
260 static struct ata_port_info info
= {
262 .flags
= ATA_FLAG_SLAVE_POSS
| ATA_FLAG_SRST
,
264 .mwdma_mask
= 0x06, /* No MWDMA0 support */
266 .port_ops
= &atiixp_port_ops
268 static struct ata_port_info
*port_info
[2] = { &info
, &info
};
269 return ata_pci_init_one(dev
, port_info
, 2);
272 static struct pci_device_id atiixp
[] = {
273 { PCI_DEVICE(PCI_VENDOR_ID_ATI
, PCI_DEVICE_ID_ATI_IXP200_IDE
), },
274 { PCI_DEVICE(PCI_VENDOR_ID_ATI
, PCI_DEVICE_ID_ATI_IXP300_IDE
), },
275 { PCI_DEVICE(PCI_VENDOR_ID_ATI
, PCI_DEVICE_ID_ATI_IXP400_IDE
), },
276 { PCI_DEVICE(PCI_VENDOR_ID_ATI
, PCI_DEVICE_ID_ATI_IXP600_IDE
), },
280 static struct pci_driver atiixp_pci_driver
= {
283 .probe
= atiixp_init_one
,
284 .remove
= ata_pci_remove_one
287 static int __init
atiixp_init(void)
289 return pci_register_driver(&atiixp_pci_driver
);
293 static void __exit
atiixp_exit(void)
295 pci_unregister_driver(&atiixp_pci_driver
);
299 MODULE_AUTHOR("Alan Cox");
300 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
301 MODULE_LICENSE("GPL");
302 MODULE_DEVICE_TABLE(pci
, atiixp
);
303 MODULE_VERSION(DRV_VERSION
);
305 module_init(atiixp_init
);
306 module_exit(atiixp_exit
);