2 * pata_pdc202xx_old.c - Promise PDC202xx PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
6 * Based in part on linux/drivers/ide/pci/pdc202xx_old.c
8 * First cut with LBA48/ATAPI
11 * Channel interlock/reset on both required ?
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/pci.h>
17 #include <linux/init.h>
18 #include <linux/blkdev.h>
19 #include <linux/delay.h>
20 #include <scsi/scsi_host.h>
21 #include <linux/libata.h>
23 #define DRV_NAME "pata_pdc202xx_old"
24 #define DRV_VERSION "0.3.0"
27 * pdc2024x_pre_reset - probe begin
30 * Set up cable type and use generic probe init
33 static int pdc2024x_pre_reset(struct ata_port *ap)
35 ap->cbl = ATA_CBL_PATA40;
36 return ata_std_prereset(ap);
40 static void pdc2024x_error_handler(struct ata_port *ap)
42 ata_bmdma_drive_eh(ap, pdc2024x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
46 static int pdc2026x_pre_reset(struct ata_port *ap)
48 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
51 pci_read_config_word(pdev, 0x50, &cis);
52 if (cis & (1 << (10 + ap->port_no)))
53 ap->cbl = ATA_CBL_PATA80;
55 ap->cbl = ATA_CBL_PATA40;
57 return ata_std_prereset(ap);
60 static void pdc2026x_error_handler(struct ata_port *ap)
62 ata_bmdma_drive_eh(ap, pdc2026x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
66 * pdc202xx_configure_piomode - set chip PIO timing
71 * Called to do the PIO mode setup. Our timing registers are shared
72 * so a configure_dmamode call will undo any work we do here and vice
76 static void pdc202xx_configure_piomode(struct ata_port *ap, struct ata_device *adev, int pio)
78 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
79 int port = 0x60 + 4 * ap->port_no + 2 * adev->devno;
80 static u16 pio_timing[5] = {
81 0x0913, 0x050C , 0x0308, 0x0206, 0x0104
85 pci_read_config_byte(pdev, port, &r_ap);
86 pci_read_config_byte(pdev, port + 1, &r_bp);
87 r_ap &= ~0x3F; /* Preserve ERRDY_EN, SYNC_IN */
89 r_ap |= (pio_timing[pio] >> 8);
90 r_bp |= (pio_timing[pio] & 0xFF);
92 if (ata_pio_need_iordy(adev))
93 r_ap |= 0x20; /* IORDY enable */
94 if (adev->class == ATA_DEV_ATA)
95 r_ap |= 0x10; /* FIFO enable */
96 pci_write_config_byte(pdev, port, r_ap);
97 pci_write_config_byte(pdev, port + 1, r_bp);
101 * pdc202xx_set_piomode - set initial PIO mode data
105 * Called to do the PIO mode setup. Our timing registers are shared
106 * but we want to set the PIO timing by default.
109 static void pdc202xx_set_piomode(struct ata_port *ap, struct ata_device *adev)
111 pdc202xx_configure_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
115 * pdc202xx_configure_dmamode - set DMA mode in chip
119 * Load DMA cycle times into the chip ready for a DMA transfer
123 static void pdc202xx_set_dmamode(struct ata_port *ap, struct ata_device *adev)
125 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
126 int port = 0x60 + 4 * ap->port_no + 2 * adev->devno;
127 static u8 udma_timing[6][2] = {
128 { 0x60, 0x03 }, /* 33 Mhz Clock */
131 { 0x40, 0x02 }, /* 66 Mhz Clock */
137 pci_read_config_byte(pdev, port + 1, &r_bp);
138 pci_read_config_byte(pdev, port + 2, &r_cp);
143 if (adev->dma_mode >= XFER_UDMA_0) {
144 int speed = adev->dma_mode - XFER_UDMA_0;
145 r_bp |= udma_timing[speed][0];
146 r_cp |= udma_timing[speed][1];
149 int speed = adev->dma_mode - XFER_MW_DMA_0;
153 pci_write_config_byte(pdev, port + 1, r_bp);
154 pci_write_config_byte(pdev, port + 2, r_cp);
159 * pdc2026x_bmdma_start - DMA engine begin
162 * In UDMA3 or higher we have to clock switch for the duration of the
163 * DMA transfer sequence.
166 static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
168 struct ata_port *ap = qc->ap;
169 struct ata_device *adev = qc->dev;
170 struct ata_taskfile *tf = &qc->tf;
171 int sel66 = ap->port_no ? 0x08: 0x02;
173 void __iomem *master = ap->host->ports[0]->ioaddr.bmdma_addr;
174 void __iomem *clock = master + 0x11;
175 void __iomem *atapi_reg = master + 0x20 + (4 * ap->port_no);
179 /* Check we keep host level locking here */
180 if (adev->dma_mode >= XFER_UDMA_2)
181 iowrite8(ioread8(clock) | sel66, clock);
183 iowrite8(ioread8(clock) & ~sel66, clock);
185 /* The DMA clocks may have been trashed by a reset. FIXME: make conditional
186 and move to qc_issue ? */
187 pdc202xx_set_dmamode(ap, qc->dev);
189 /* Cases the state machine will not complete correctly without help */
190 if ((tf->flags & ATA_TFLAG_LBA48) || tf->protocol == ATA_PROT_ATAPI_DMA)
194 if (tf->flags & ATA_TFLAG_WRITE)
199 iowrite32(len, atapi_reg);
207 * pdc2026x_bmdma_end - DMA engine stop
210 * After a DMA completes we need to put the clock back to 33MHz for
214 static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
216 struct ata_port *ap = qc->ap;
217 struct ata_device *adev = qc->dev;
218 struct ata_taskfile *tf = &qc->tf;
220 int sel66 = ap->port_no ? 0x08: 0x02;
221 /* The clock bits are in the same register for both channels */
222 void __iomem *master = ap->host->ports[0]->ioaddr.bmdma_addr;
223 void __iomem *clock = master + 0x11;
224 void __iomem *atapi_reg = master + 0x20 + (4 * ap->port_no);
226 /* Cases the state machine will not complete correctly */
227 if (tf->protocol == ATA_PROT_ATAPI_DMA || ( tf->flags & ATA_TFLAG_LBA48)) {
228 iowrite32(0, atapi_reg);
229 iowrite8(ioread8(clock) & ~sel66, clock);
231 /* Check we keep host level locking here */
232 /* Flip back to 33Mhz for PIO */
233 if (adev->dma_mode >= XFER_UDMA_2)
234 iowrite8(ioread8(clock) & ~sel66, clock);
240 * pdc2026x_dev_config - device setup hook
242 * @adev: newly found device
244 * Perform chip specific early setup. We need to lock the transfer
245 * sizes to 8bit to avoid making the state engine on the 2026x cards
249 static void pdc2026x_dev_config(struct ata_port *ap, struct ata_device *adev)
251 adev->max_sectors = 256;
254 static struct scsi_host_template pdc202xx_sht = {
255 .module = THIS_MODULE,
257 .ioctl = ata_scsi_ioctl,
258 .queuecommand = ata_scsi_queuecmd,
259 .can_queue = ATA_DEF_QUEUE,
260 .this_id = ATA_SHT_THIS_ID,
261 .sg_tablesize = LIBATA_MAX_PRD,
262 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
263 .emulated = ATA_SHT_EMULATED,
264 .use_clustering = ATA_SHT_USE_CLUSTERING,
265 .proc_name = DRV_NAME,
266 .dma_boundary = ATA_DMA_BOUNDARY,
267 .slave_configure = ata_scsi_slave_config,
268 .slave_destroy = ata_scsi_slave_destroy,
269 .bios_param = ata_std_bios_param,
270 .resume = ata_scsi_device_resume,
271 .suspend = ata_scsi_device_suspend,
274 static struct ata_port_operations pdc2024x_port_ops = {
275 .port_disable = ata_port_disable,
276 .set_piomode = pdc202xx_set_piomode,
277 .set_dmamode = pdc202xx_set_dmamode,
278 .mode_filter = ata_pci_default_filter,
279 .tf_load = ata_tf_load,
280 .tf_read = ata_tf_read,
281 .check_status = ata_check_status,
282 .exec_command = ata_exec_command,
283 .dev_select = ata_std_dev_select,
285 .freeze = ata_bmdma_freeze,
286 .thaw = ata_bmdma_thaw,
287 .error_handler = pdc2024x_error_handler,
288 .post_internal_cmd = ata_bmdma_post_internal_cmd,
290 .bmdma_setup = ata_bmdma_setup,
291 .bmdma_start = ata_bmdma_start,
292 .bmdma_stop = ata_bmdma_stop,
293 .bmdma_status = ata_bmdma_status,
295 .qc_prep = ata_qc_prep,
296 .qc_issue = ata_qc_issue_prot,
297 .data_xfer = ata_data_xfer,
299 .irq_handler = ata_interrupt,
300 .irq_clear = ata_bmdma_irq_clear,
301 .irq_on = ata_irq_on,
302 .irq_ack = ata_irq_ack,
304 .port_start = ata_port_start,
307 static struct ata_port_operations pdc2026x_port_ops = {
308 .port_disable = ata_port_disable,
309 .set_piomode = pdc202xx_set_piomode,
310 .set_dmamode = pdc202xx_set_dmamode,
311 .mode_filter = ata_pci_default_filter,
312 .tf_load = ata_tf_load,
313 .tf_read = ata_tf_read,
314 .check_status = ata_check_status,
315 .exec_command = ata_exec_command,
316 .dev_select = ata_std_dev_select,
317 .dev_config = pdc2026x_dev_config,
319 .freeze = ata_bmdma_freeze,
320 .thaw = ata_bmdma_thaw,
321 .error_handler = pdc2026x_error_handler,
322 .post_internal_cmd = ata_bmdma_post_internal_cmd,
324 .bmdma_setup = ata_bmdma_setup,
325 .bmdma_start = pdc2026x_bmdma_start,
326 .bmdma_stop = pdc2026x_bmdma_stop,
327 .bmdma_status = ata_bmdma_status,
329 .qc_prep = ata_qc_prep,
330 .qc_issue = ata_qc_issue_prot,
331 .data_xfer = ata_data_xfer,
333 .irq_handler = ata_interrupt,
334 .irq_clear = ata_bmdma_irq_clear,
335 .irq_on = ata_irq_on,
336 .irq_ack = ata_irq_ack,
338 .port_start = ata_port_start,
341 static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
343 static struct ata_port_info info[3] = {
345 .sht = &pdc202xx_sht,
346 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
349 .udma_mask = ATA_UDMA2,
350 .port_ops = &pdc2024x_port_ops
353 .sht = &pdc202xx_sht,
354 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
357 .udma_mask = ATA_UDMA4,
358 .port_ops = &pdc2026x_port_ops
361 .sht = &pdc202xx_sht,
362 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
365 .udma_mask = ATA_UDMA5,
366 .port_ops = &pdc2026x_port_ops
370 static struct ata_port_info *port_info[2];
372 port_info[0] = port_info[1] = &info[id->driver_data];
374 if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
375 struct pci_dev *bridge = dev->bus->self;
376 /* Don't grab anything behind a Promise I2O RAID */
377 if (bridge && bridge->vendor == PCI_VENDOR_ID_INTEL) {
378 if( bridge->device == PCI_DEVICE_ID_INTEL_I960)
380 if( bridge->device == PCI_DEVICE_ID_INTEL_I960RM)
384 return ata_pci_init_one(dev, port_info, 2);
387 static const struct pci_device_id pdc202xx[] = {
388 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
389 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
390 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
391 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
392 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
397 static struct pci_driver pdc202xx_pci_driver = {
399 .id_table = pdc202xx,
400 .probe = pdc202xx_init_one,
401 .remove = ata_pci_remove_one,
402 .suspend = ata_pci_device_suspend,
403 .resume = ata_pci_device_resume,
406 static int __init pdc202xx_init(void)
408 return pci_register_driver(&pdc202xx_pci_driver);
411 static void __exit pdc202xx_exit(void)
413 pci_unregister_driver(&pdc202xx_pci_driver);
416 MODULE_AUTHOR("Alan Cox");
417 MODULE_DESCRIPTION("low-level driver for Promise 2024x and 20262-20267");
418 MODULE_LICENSE("GPL");
419 MODULE_DEVICE_TABLE(pci, pdc202xx);
420 MODULE_VERSION(DRV_VERSION);
422 module_init(pdc202xx_init);
423 module_exit(pdc202xx_exit);