2 * pata_artop.c - ARTOP ATA controller driver
5 * (C) 2007 Bartlomiej Zolnierkiewicz
7 * Based in part on drivers/ide/pci/aec62xx.c
8 * Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
9 * 865/865R fixes for Macintosh card version from a patch to the old
10 * driver by Thibaut VARENE <varenet@parisc-linux.org>
11 * When setting the PCI latency we must set 0x80 or higher for burst
12 * performance Alessandro Zummo <alessandro.zummo@towertech.it>
15 * Investigate no_dsc on 850R
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/pci.h>
22 #include <linux/init.h>
23 #include <linux/blkdev.h>
24 #include <linux/delay.h>
25 #include <linux/device.h>
26 #include <scsi/scsi_host.h>
27 #include <linux/libata.h>
28 #include <linux/ata.h>
30 #define DRV_NAME "pata_artop"
31 #define DRV_VERSION "0.4.5"
34 * The ARTOP has 33 Mhz and "over clocked" timing tables. Until we
35 * get PCI bus speed functionality we leave this as 0. Its a variable
36 * for when we get the functionality and also for folks wanting to
42 static int artop6210_pre_reset(struct ata_link *link, unsigned long deadline)
44 struct ata_port *ap = link->ap;
45 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
46 const struct pci_bits artop_enable_bits[] = {
47 { 0x4AU, 1U, 0x02UL, 0x02UL }, /* port 0 */
48 { 0x4AU, 1U, 0x04UL, 0x04UL }, /* port 1 */
51 if (!pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
54 return ata_sff_prereset(link, deadline);
58 * artop6260_pre_reset - check for 40/80 pin
60 * @deadline: deadline jiffies for the operation
62 * The ARTOP hardware reports the cable detect bits in register 0x49.
63 * Nothing complicated needed here.
66 static int artop6260_pre_reset(struct ata_link *link, unsigned long deadline)
68 static const struct pci_bits artop_enable_bits[] = {
69 { 0x4AU, 1U, 0x02UL, 0x02UL }, /* port 0 */
70 { 0x4AU, 1U, 0x04UL, 0x04UL }, /* port 1 */
73 struct ata_port *ap = link->ap;
74 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
76 /* Odd numbered device ids are the units with enable bits (the -R cards) */
77 if (pdev->device % 1 && !pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
80 return ata_sff_prereset(link, deadline);
84 * artop6260_cable_detect - identify cable type
87 * Identify the cable type for the ARTOP interface in question
90 static int artop6260_cable_detect(struct ata_port *ap)
92 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
94 pci_read_config_byte(pdev, 0x49, &tmp);
95 if (tmp & (1 << ap->port_no))
96 return ATA_CBL_PATA40;
97 return ATA_CBL_PATA80;
101 * artop6210_load_piomode - Load a set of PATA PIO timings
102 * @ap: Port whose timings we are configuring
106 * Set PIO mode for device, in host controller PCI config space. This
107 * is used both to set PIO timings in PIO mode and also to set the
108 * matching PIO clocking for UDMA, as well as the MWDMA timings.
111 * None (inherited from caller).
114 static void artop6210_load_piomode(struct ata_port *ap, struct ata_device *adev, unsigned int pio)
116 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
117 int dn = adev->devno + 2 * ap->port_no;
118 const u16 timing[2][5] = {
119 { 0x0000, 0x000A, 0x0008, 0x0303, 0x0301 },
120 { 0x0700, 0x070A, 0x0708, 0x0403, 0x0401 }
123 /* Load the PIO timing active/recovery bits */
124 pci_write_config_word(pdev, 0x40 + 2 * dn, timing[clock][pio]);
128 * artop6210_set_piomode - Initialize host controller PATA PIO timings
129 * @ap: Port whose timings we are configuring
130 * @adev: Device we are configuring
132 * Set PIO mode for device, in host controller PCI config space. For
133 * ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
134 * the event UDMA is used the later call to set_dmamode will set the
138 * None (inherited from caller).
141 static void artop6210_set_piomode(struct ata_port *ap, struct ata_device *adev)
143 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
144 int dn = adev->devno + 2 * ap->port_no;
147 artop6210_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
149 /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
150 pci_read_config_byte(pdev, 0x54, &ultra);
151 ultra &= ~(3 << (2 * dn));
152 pci_write_config_byte(pdev, 0x54, ultra);
156 * artop6260_load_piomode - Initialize host controller PATA PIO timings
157 * @ap: Port whose timings we are configuring
158 * @adev: Device we are configuring
161 * Set PIO mode for device, in host controller PCI config space. The
162 * ARTOP6260 and relatives store the timing data differently.
165 * None (inherited from caller).
168 static void artop6260_load_piomode (struct ata_port *ap, struct ata_device *adev, unsigned int pio)
170 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
171 int dn = adev->devno + 2 * ap->port_no;
172 const u8 timing[2][5] = {
173 { 0x00, 0x0A, 0x08, 0x33, 0x31 },
174 { 0x70, 0x7A, 0x78, 0x43, 0x41 }
177 /* Load the PIO timing active/recovery bits */
178 pci_write_config_byte(pdev, 0x40 + dn, timing[clock][pio]);
182 * artop6260_set_piomode - Initialize host controller PATA PIO timings
183 * @ap: Port whose timings we are configuring
184 * @adev: Device we are configuring
186 * Set PIO mode for device, in host controller PCI config space. For
187 * ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
188 * the event UDMA is used the later call to set_dmamode will set the
192 * None (inherited from caller).
195 static void artop6260_set_piomode(struct ata_port *ap, struct ata_device *adev)
197 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
200 artop6260_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
202 /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
203 pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
204 ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */
205 pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
209 * artop6210_set_dmamode - Initialize host controller PATA PIO timings
210 * @ap: Port whose timings we are configuring
211 * @adev: Device whose timings we are configuring
213 * Set DMA mode for device, in host controller PCI config space.
216 * None (inherited from caller).
219 static void artop6210_set_dmamode (struct ata_port *ap, struct ata_device *adev)
222 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
223 int dn = adev->devno + 2 * ap->port_no;
226 if (adev->dma_mode == XFER_MW_DMA_0)
231 /* Load the PIO timing active/recovery bits */
232 artop6210_load_piomode(ap, adev, pio);
234 pci_read_config_byte(pdev, 0x54, &ultra);
235 ultra &= ~(3 << (2 * dn));
237 /* Add ultra DMA bits if in UDMA mode */
238 if (adev->dma_mode >= XFER_UDMA_0) {
239 u8 mode = (adev->dma_mode - XFER_UDMA_0) + 1 - clock;
242 ultra |= (mode << (2 * dn));
244 pci_write_config_byte(pdev, 0x54, ultra);
248 * artop6260_set_dmamode - Initialize host controller PATA PIO timings
249 * @ap: Port whose timings we are configuring
250 * @adev: Device we are configuring
252 * Set DMA mode for device, in host controller PCI config space. The
253 * ARTOP6260 and relatives store the timing data differently.
256 * None (inherited from caller).
259 static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev)
261 unsigned int pio = adev->pio_mode - XFER_PIO_0;
262 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
265 if (adev->dma_mode == XFER_MW_DMA_0)
270 /* Load the PIO timing active/recovery bits */
271 artop6260_load_piomode(ap, adev, pio);
273 /* Add ultra DMA bits if in UDMA mode */
274 pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
275 ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */
276 if (adev->dma_mode >= XFER_UDMA_0) {
277 u8 mode = adev->dma_mode - XFER_UDMA_0 + 1 - clock;
280 ultra |= (mode << (4 * adev->devno));
282 pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
286 * artop_6210_qc_defer - implement serialization
289 * Issue commands per host on this chip.
292 static int artop6210_qc_defer(struct ata_queued_cmd *qc)
294 struct ata_host *host = qc->ap->host;
295 struct ata_port *alt = host->ports[1 ^ qc->ap->port_no];
298 /* First apply the usual rules */
299 rc = ata_std_qc_defer(qc);
303 /* Now apply serialization rules. Only allow a command if the
304 other channel state machine is idle */
305 if (alt && alt->qc_active)
306 return ATA_DEFER_PORT;
310 static struct scsi_host_template artop_sht = {
311 ATA_BMDMA_SHT(DRV_NAME),
314 static struct ata_port_operations artop6210_ops = {
315 .inherits = &ata_bmdma_port_ops,
316 .cable_detect = ata_cable_40wire,
317 .set_piomode = artop6210_set_piomode,
318 .set_dmamode = artop6210_set_dmamode,
319 .prereset = artop6210_pre_reset,
320 .qc_defer = artop6210_qc_defer,
323 static struct ata_port_operations artop6260_ops = {
324 .inherits = &ata_bmdma_port_ops,
325 .cable_detect = artop6260_cable_detect,
326 .set_piomode = artop6260_set_piomode,
327 .set_dmamode = artop6260_set_dmamode,
328 .prereset = artop6260_pre_reset,
333 * artop_init_one - Register ARTOP ATA PCI device with kernel services
334 * @pdev: PCI device to register
335 * @ent: Entry in artop_pci_tbl matching with @pdev
337 * Called from kernel PCI layer.
340 * Inherited from PCI layer (may sleep).
343 * Zero on success, or -ERRNO value.
346 static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
348 static int printed_version;
349 static const struct ata_port_info info_6210 = {
350 .flags = ATA_FLAG_SLAVE_POSS,
351 .pio_mask = ATA_PIO4,
352 .mwdma_mask = ATA_MWDMA2,
353 .udma_mask = ATA_UDMA2,
354 .port_ops = &artop6210_ops,
356 static const struct ata_port_info info_626x = {
357 .flags = ATA_FLAG_SLAVE_POSS,
358 .pio_mask = ATA_PIO4,
359 .mwdma_mask = ATA_MWDMA2,
360 .udma_mask = ATA_UDMA4,
361 .port_ops = &artop6260_ops,
363 static const struct ata_port_info info_628x = {
364 .flags = ATA_FLAG_SLAVE_POSS,
365 .pio_mask = ATA_PIO4,
366 .mwdma_mask = ATA_MWDMA2,
367 .udma_mask = ATA_UDMA5,
368 .port_ops = &artop6260_ops,
370 static const struct ata_port_info info_628x_fast = {
371 .flags = ATA_FLAG_SLAVE_POSS,
372 .pio_mask = ATA_PIO4,
373 .mwdma_mask = ATA_MWDMA2,
374 .udma_mask = ATA_UDMA6,
375 .port_ops = &artop6260_ops,
377 const struct ata_port_info *ppi[] = { NULL, NULL };
380 if (!printed_version++)
381 dev_printk(KERN_DEBUG, &pdev->dev,
382 "version " DRV_VERSION "\n");
384 rc = pcim_enable_device(pdev);
388 if (id->driver_data == 0) { /* 6210 variant */
390 /* BIOS may have left us in UDMA, clear it before libata probe */
391 pci_write_config_byte(pdev, 0x54, 0);
393 else if (id->driver_data == 1) /* 6260 */
395 else if (id->driver_data == 2) { /* 6280 or 6280 + fast */
396 unsigned long io = pci_resource_start(pdev, 4);
401 ppi[0] = &info_628x_fast;
402 /* Mac systems come up with some registers not set as we
405 /* Clear reset & test bits */
406 pci_read_config_byte(pdev, 0x49, ®);
407 pci_write_config_byte(pdev, 0x49, reg & ~ 0x30);
409 /* PCI latency must be > 0x80 for burst mode, tweak it
412 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, ®);
414 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90);
416 /* Enable IRQ output and burst mode */
417 pci_read_config_byte(pdev, 0x4a, ®);
418 pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80);
422 BUG_ON(ppi[0] == NULL);
424 return ata_pci_sff_init_one(pdev, ppi, &artop_sht, NULL);
427 static const struct pci_device_id artop_pci_tbl[] = {
428 { PCI_VDEVICE(ARTOP, 0x0005), 0 },
429 { PCI_VDEVICE(ARTOP, 0x0006), 1 },
430 { PCI_VDEVICE(ARTOP, 0x0007), 1 },
431 { PCI_VDEVICE(ARTOP, 0x0008), 2 },
432 { PCI_VDEVICE(ARTOP, 0x0009), 2 },
434 { } /* terminate list */
437 static struct pci_driver artop_pci_driver = {
439 .id_table = artop_pci_tbl,
440 .probe = artop_init_one,
441 .remove = ata_pci_remove_one,
444 static int __init artop_init(void)
446 return pci_register_driver(&artop_pci_driver);
449 static void __exit artop_exit(void)
451 pci_unregister_driver(&artop_pci_driver);
454 module_init(artop_init);
455 module_exit(artop_exit);
457 MODULE_AUTHOR("Alan Cox");
458 MODULE_DESCRIPTION("SCSI low-level driver for ARTOP PATA");
459 MODULE_LICENSE("GPL");
460 MODULE_DEVICE_TABLE(pci, artop_pci_tbl);
461 MODULE_VERSION(DRV_VERSION);