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 "0.2.1"
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 * pdc_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 pdc_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 * pdc_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 pdc_set_piomode(struct ata_port *ap, struct ata_device *adev)
111 pdc_configure_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
115 * pdc_configure_dmamode - set DMA mode in chip
119 * Load DMA cycle times into the chip ready for a DMA transfer
123 static void pdc_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 unsigned long master = ap->host->ports[0]->ioaddr.bmdma_addr;
174 unsigned long clock = master + 0x11;
175 unsigned long 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 outb(inb(clock) | sel66, clock);
183 outb(inb(clock) & ~sel66, clock);
185 /* The DMA clocks may have been trashed by a reset. FIXME: make conditional
186 and move to qc_issue ? */
187 pdc_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)
192 if (tf->flags & ATA_TFLAG_LBA48)
193 len = qc->nsect * 512;
197 if (tf->flags & ATA_TFLAG_WRITE)
202 outl(len, atapi_reg);
210 * pdc2026x_bmdma_end - DMA engine stop
213 * After a DMA completes we need to put the clock back to 33MHz for
217 static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
219 struct ata_port *ap = qc->ap;
220 struct ata_device *adev = qc->dev;
221 struct ata_taskfile *tf = &qc->tf;
223 int sel66 = ap->port_no ? 0x08: 0x02;
224 /* The clock bits are in the same register for both channels */
225 unsigned long master = ap->host->ports[0]->ioaddr.bmdma_addr;
226 unsigned long clock = master + 0x11;
227 unsigned long atapi_reg = master + 0x20 + (4 * ap->port_no);
229 /* Cases the state machine will not complete correctly */
230 if (tf->protocol == ATA_PROT_ATAPI_DMA || ( tf->flags & ATA_TFLAG_LBA48)) {
232 outb(inb(clock) & ~sel66, clock);
234 /* Check we keep host level locking here */
235 /* Flip back to 33Mhz for PIO */
236 if (adev->dma_mode >= XFER_UDMA_2)
237 outb(inb(clock) & ~sel66, clock);
243 * pdc2026x_dev_config - device setup hook
245 * @adev: newly found device
247 * Perform chip specific early setup. We need to lock the transfer
248 * sizes to 8bit to avoid making the state engine on the 2026x cards
252 static void pdc2026x_dev_config(struct ata_port *ap, struct ata_device *adev)
254 adev->max_sectors = 256;
257 static struct scsi_host_template pdc_sht = {
258 .module = THIS_MODULE,
260 .ioctl = ata_scsi_ioctl,
261 .queuecommand = ata_scsi_queuecmd,
262 .can_queue = ATA_DEF_QUEUE,
263 .this_id = ATA_SHT_THIS_ID,
264 .sg_tablesize = LIBATA_MAX_PRD,
265 .max_sectors = ATA_MAX_SECTORS,
266 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
267 .emulated = ATA_SHT_EMULATED,
268 .use_clustering = ATA_SHT_USE_CLUSTERING,
269 .proc_name = DRV_NAME,
270 .dma_boundary = ATA_DMA_BOUNDARY,
271 .slave_configure = ata_scsi_slave_config,
272 .bios_param = ata_std_bios_param,
275 static struct ata_port_operations pdc2024x_port_ops = {
276 .port_disable = ata_port_disable,
277 .set_piomode = pdc_set_piomode,
278 .set_dmamode = pdc_set_dmamode,
279 .mode_filter = ata_pci_default_filter,
280 .tf_load = ata_tf_load,
281 .tf_read = ata_tf_read,
282 .check_status = ata_check_status,
283 .exec_command = ata_exec_command,
284 .dev_select = ata_std_dev_select,
286 .freeze = ata_bmdma_freeze,
287 .thaw = ata_bmdma_thaw,
288 .error_handler = pdc2024x_error_handler,
289 .post_internal_cmd = ata_bmdma_post_internal_cmd,
291 .bmdma_setup = ata_bmdma_setup,
292 .bmdma_start = ata_bmdma_start,
293 .bmdma_stop = ata_bmdma_stop,
294 .bmdma_status = ata_bmdma_status,
296 .qc_prep = ata_qc_prep,
297 .qc_issue = ata_qc_issue_prot,
298 .data_xfer = ata_pio_data_xfer,
300 .irq_handler = ata_interrupt,
301 .irq_clear = ata_bmdma_irq_clear,
303 .port_start = ata_port_start,
304 .port_stop = ata_port_stop,
305 .host_stop = ata_host_stop
308 static struct ata_port_operations pdc2026x_port_ops = {
309 .port_disable = ata_port_disable,
310 .set_piomode = pdc_set_piomode,
311 .set_dmamode = pdc_set_dmamode,
312 .mode_filter = ata_pci_default_filter,
313 .tf_load = ata_tf_load,
314 .tf_read = ata_tf_read,
315 .check_status = ata_check_status,
316 .exec_command = ata_exec_command,
317 .dev_select = ata_std_dev_select,
318 .dev_config = pdc2026x_dev_config,
320 .freeze = ata_bmdma_freeze,
321 .thaw = ata_bmdma_thaw,
322 .error_handler = pdc2026x_error_handler,
323 .post_internal_cmd = ata_bmdma_post_internal_cmd,
325 .bmdma_setup = ata_bmdma_setup,
326 .bmdma_start = pdc2026x_bmdma_start,
327 .bmdma_stop = pdc2026x_bmdma_stop,
328 .bmdma_status = ata_bmdma_status,
330 .qc_prep = ata_qc_prep,
331 .qc_issue = ata_qc_issue_prot,
332 .data_xfer = ata_pio_data_xfer,
334 .irq_handler = ata_interrupt,
335 .irq_clear = ata_bmdma_irq_clear,
337 .port_start = ata_port_start,
338 .port_stop = ata_port_stop,
339 .host_stop = ata_host_stop
342 static int pdc_init_one(struct pci_dev *dev, const struct pci_device_id *id)
344 static struct ata_port_info info[3] = {
347 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
350 .udma_mask = ATA_UDMA2,
351 .port_ops = &pdc2024x_port_ops
355 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
358 .udma_mask = ATA_UDMA4,
359 .port_ops = &pdc2026x_port_ops
363 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
366 .udma_mask = ATA_UDMA5,
367 .port_ops = &pdc2026x_port_ops
371 static struct ata_port_info *port_info[2];
373 port_info[0] = port_info[1] = &info[id->driver_data];
375 if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
376 struct pci_dev *bridge = dev->bus->self;
377 /* Don't grab anything behind a Promise I2O RAID */
378 if (bridge && bridge->vendor == PCI_VENDOR_ID_INTEL) {
379 if( bridge->device == PCI_DEVICE_ID_INTEL_I960)
381 if( bridge->device == PCI_DEVICE_ID_INTEL_I960RM)
385 return ata_pci_init_one(dev, port_info, 2);
388 static struct pci_device_id pdc[] = {
389 { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0},
390 { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1},
391 { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1},
392 { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2},
393 { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2},
397 static struct pci_driver pdc_pci_driver = {
400 .probe = pdc_init_one,
401 .remove = ata_pci_remove_one
404 static int __init pdc_init(void)
406 return pci_register_driver(&pdc_pci_driver);
410 static void __exit pdc_exit(void)
412 pci_unregister_driver(&pdc_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, pdc);
420 MODULE_VERSION(DRV_VERSION);
422 module_init(pdc_init);
423 module_exit(pdc_exit);