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 "0.4.5"
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, unsigned long deadline)
38 static const struct pci_bits atiixp_enable_bits[] = {
39 { 0x48, 1, 0x01, 0x00 },
40 { 0x48, 1, 0x08, 0x00 }
42 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
44 if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
47 return ata_std_prereset(ap, deadline);
50 static void atiixp_error_handler(struct ata_port *ap)
52 ata_bmdma_drive_eh(ap, atiixp_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
55 static int atiixp_cable_detect(struct ata_port *ap)
57 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
60 /* Hack from drivers/ide/pci. Really we want to know how to do the
61 raw detection not play follow the bios mode guess */
62 pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
63 if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
64 return ATA_CBL_PATA80;
65 return ATA_CBL_PATA40;
69 * atiixp_set_pio_timing - set initial PIO mode data
73 * Called by both the pio and dma setup functions to set the controller
74 * timings for PIO transfers. We must load both the mode number and
75 * timing values into the controller.
78 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
80 static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
82 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
83 int dn = 2 * ap->port_no + adev->devno;
85 /* Check this is correct - the order is odd in both drivers */
86 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
87 u16 pio_mode_data, pio_timing_data;
89 pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
90 pio_mode_data &= ~(0x7 << (4 * dn));
91 pio_mode_data |= pio << (4 * dn);
92 pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
94 pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
95 pio_mode_data &= ~(0xFF << timing_shift);
96 pio_mode_data |= (pio_timings[pio] << timing_shift);
97 pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
101 * atiixp_set_piomode - set initial PIO mode data
105 * Called to do the PIO mode setup. We use a shared helper for this
106 * as the DMA setup must also adjust the PIO timing information.
109 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
111 atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
115 * atiixp_set_dmamode - set initial DMA mode data
119 * Called to do the DMA mode setup. We use timing tables for most
120 * modes but must tune an appropriate PIO mode to match.
123 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
125 static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
127 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
128 int dma = adev->dma_mode;
129 int dn = 2 * ap->port_no + adev->devno;
132 if (adev->dma_mode >= XFER_UDMA_0) {
137 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
138 udma_mode_data &= ~(0x7 << (4 * dn));
139 udma_mode_data |= dma << (4 * dn);
140 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
142 u16 mwdma_timing_data;
143 /* Check this is correct - the order is odd in both drivers */
144 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
146 dma -= XFER_MW_DMA_0;
148 pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data);
149 mwdma_timing_data &= ~(0xFF << timing_shift);
150 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
151 pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data);
154 * We must now look at the PIO mode situation. We may need to
155 * adjust the PIO mode to keep the timings acceptable
157 if (adev->dma_mode >= XFER_MW_DMA_2)
159 else if (adev->dma_mode == XFER_MW_DMA_1)
161 else if (adev->dma_mode == XFER_MW_DMA_0)
165 if (adev->pio_mode != wanted_pio)
166 atiixp_set_pio_timing(ap, adev, wanted_pio);
170 * atiixp_bmdma_start - DMA start callback
171 * @qc: Command in progress
173 * When DMA begins we need to ensure that the UDMA control
174 * register for the channel is correctly set.
177 static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
179 struct ata_port *ap = qc->ap;
180 struct ata_device *adev = qc->dev;
182 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
183 int dn = (2 * ap->port_no) + adev->devno;
186 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
187 if (adev->dma_mode >= XFER_UDMA_0)
191 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
196 * atiixp_dma_stop - DMA stop callback
197 * @qc: Command in progress
199 * DMA has completed. Clear the UDMA flag as the next operations will
200 * be PIO ones not UDMA data transfer.
203 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
205 struct ata_port *ap = qc->ap;
206 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
207 int dn = (2 * ap->port_no) + qc->dev->devno;
210 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
212 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
216 static struct scsi_host_template atiixp_sht = {
217 .module = THIS_MODULE,
219 .ioctl = ata_scsi_ioctl,
220 .queuecommand = ata_scsi_queuecmd,
221 .can_queue = ATA_DEF_QUEUE,
222 .this_id = ATA_SHT_THIS_ID,
223 .sg_tablesize = LIBATA_MAX_PRD,
224 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
225 .emulated = ATA_SHT_EMULATED,
226 .use_clustering = ATA_SHT_USE_CLUSTERING,
227 .proc_name = DRV_NAME,
228 .dma_boundary = ATA_DMA_BOUNDARY,
229 .slave_configure = ata_scsi_slave_config,
230 .slave_destroy = ata_scsi_slave_destroy,
231 .bios_param = ata_std_bios_param,
234 static struct ata_port_operations atiixp_port_ops = {
235 .port_disable = ata_port_disable,
236 .set_piomode = atiixp_set_piomode,
237 .set_dmamode = atiixp_set_dmamode,
238 .mode_filter = ata_pci_default_filter,
239 .tf_load = ata_tf_load,
240 .tf_read = ata_tf_read,
241 .check_status = ata_check_status,
242 .exec_command = ata_exec_command,
243 .dev_select = ata_std_dev_select,
245 .freeze = ata_bmdma_freeze,
246 .thaw = ata_bmdma_thaw,
247 .error_handler = atiixp_error_handler,
248 .post_internal_cmd = ata_bmdma_post_internal_cmd,
249 .cable_detect = atiixp_cable_detect,
251 .bmdma_setup = ata_bmdma_setup,
252 .bmdma_start = atiixp_bmdma_start,
253 .bmdma_stop = atiixp_bmdma_stop,
254 .bmdma_status = ata_bmdma_status,
256 .qc_prep = ata_qc_prep,
257 .qc_issue = ata_qc_issue_prot,
259 .data_xfer = ata_data_xfer,
261 .irq_handler = ata_interrupt,
262 .irq_clear = ata_bmdma_irq_clear,
263 .irq_on = ata_irq_on,
264 .irq_ack = ata_irq_ack,
266 .port_start = ata_port_start,
269 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
271 static const struct ata_port_info info = {
273 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
275 .mwdma_mask = 0x06, /* No MWDMA0 support */
277 .port_ops = &atiixp_port_ops
279 const struct ata_port_info *ppi[] = { &info, NULL };
280 return ata_pci_init_one(dev, ppi);
283 static const struct pci_device_id atiixp[] = {
284 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
285 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
286 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
287 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
292 static struct pci_driver atiixp_pci_driver = {
295 .probe = atiixp_init_one,
296 .remove = ata_pci_remove_one,
298 .resume = ata_pci_device_resume,
299 .suspend = ata_pci_device_suspend,
303 static int __init atiixp_init(void)
305 return pci_register_driver(&atiixp_pci_driver);
309 static void __exit atiixp_exit(void)
311 pci_unregister_driver(&atiixp_pci_driver);
314 MODULE_AUTHOR("Alan Cox");
315 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
316 MODULE_LICENSE("GPL");
317 MODULE_DEVICE_TABLE(pci, atiixp);
318 MODULE_VERSION(DRV_VERSION);
320 module_init(atiixp_init);
321 module_exit(atiixp_exit);