2 * Support for IDE interfaces on Celleb platform
4 * (C) Copyright 2006 TOSHIBA CORPORATION
6 * This code is based on drivers/ata/ata_piix.c:
7 * Copyright 2003-2005 Red Hat Inc
8 * Copyright 2003-2005 Jeff Garzik
9 * Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
10 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
11 * Copyright (C) 2003 Red Hat Inc <alan@redhat.com>
13 * and drivers/ata/ahci.c:
14 * Copyright 2004-2005 Red Hat, Inc.
16 * and drivers/ata/libata-core.c:
17 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
18 * Copyright 2003-2004 Jeff Garzik
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 2 of the License, or
23 * (at your option) any later version.
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License along
31 * with this program; if not, write to the Free Software Foundation, Inc.,
32 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/blkdev.h>
40 #include <linux/delay.h>
41 #include <linux/device.h>
42 #include <scsi/scsi_host.h>
43 #include <linux/libata.h>
45 #define DRV_NAME "pata_scc"
46 #define DRV_VERSION "0.3"
48 #define PCI_DEVICE_ID_TOSHIBA_SCC_ATA 0x01b4
51 #define SCC_CTRL_BAR 0
52 #define SCC_BMID_BAR 1
54 /* offset of CTRL registers */
55 #define SCC_CTL_PIOSHT 0x000
56 #define SCC_CTL_PIOCT 0x004
57 #define SCC_CTL_MDMACT 0x008
58 #define SCC_CTL_MCRCST 0x00C
59 #define SCC_CTL_SDMACT 0x010
60 #define SCC_CTL_SCRCST 0x014
61 #define SCC_CTL_UDENVT 0x018
62 #define SCC_CTL_TDVHSEL 0x020
63 #define SCC_CTL_MODEREG 0x024
64 #define SCC_CTL_ECMODE 0xF00
65 #define SCC_CTL_MAEA0 0xF50
66 #define SCC_CTL_MAEC0 0xF54
67 #define SCC_CTL_CCKCTRL 0xFF0
69 /* offset of BMID registers */
70 #define SCC_DMA_CMD 0x000
71 #define SCC_DMA_STATUS 0x004
72 #define SCC_DMA_TABLE_OFS 0x008
73 #define SCC_DMA_INTMASK 0x010
74 #define SCC_DMA_INTST 0x014
75 #define SCC_DMA_PTERADD 0x018
76 #define SCC_REG_CMD_ADDR 0x020
77 #define SCC_REG_DATA 0x000
78 #define SCC_REG_ERR 0x004
79 #define SCC_REG_FEATURE 0x004
80 #define SCC_REG_NSECT 0x008
81 #define SCC_REG_LBAL 0x00C
82 #define SCC_REG_LBAM 0x010
83 #define SCC_REG_LBAH 0x014
84 #define SCC_REG_DEVICE 0x018
85 #define SCC_REG_STATUS 0x01C
86 #define SCC_REG_CMD 0x01C
87 #define SCC_REG_ALTSTATUS 0x020
90 #define TDVHSEL_MASTER 0x00000001
91 #define TDVHSEL_SLAVE 0x00000004
93 #define MODE_JCUSFEN 0x00000080
95 #define ECMODE_VALUE 0x01
97 #define CCKCTRL_ATARESET 0x00040000
98 #define CCKCTRL_BUFCNT 0x00020000
99 #define CCKCTRL_CRST 0x00010000
100 #define CCKCTRL_OCLKEN 0x00000100
101 #define CCKCTRL_ATACLKOEN 0x00000002
102 #define CCKCTRL_LCLKEN 0x00000001
104 #define QCHCD_IOS_SS 0x00000001
106 #define QCHSD_STPDIAG 0x00020000
108 #define INTMASK_MSK 0xD1000012
109 #define INTSTS_SERROR 0x80000000
110 #define INTSTS_PRERR 0x40000000
111 #define INTSTS_RERR 0x10000000
112 #define INTSTS_ICERR 0x01000000
113 #define INTSTS_BMSINT 0x00000010
114 #define INTSTS_BMHE 0x00000008
115 #define INTSTS_IOIRQS 0x00000004
116 #define INTSTS_INTRQ 0x00000002
117 #define INTSTS_ACTEINT 0x00000001
120 /* PIO transfer mode table */
122 static const unsigned long JCHSTtbl[2][7] = {
123 {0x0E, 0x05, 0x02, 0x03, 0x02, 0x00, 0x00}, /* 100MHz */
124 {0x13, 0x07, 0x04, 0x04, 0x03, 0x00, 0x00} /* 133MHz */
128 static const unsigned long JCHHTtbl[2][7] = {
129 {0x0E, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00}, /* 100MHz */
130 {0x13, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00} /* 133MHz */
134 static const unsigned long JCHCTtbl[2][7] = {
135 {0x1D, 0x1D, 0x1C, 0x0B, 0x06, 0x00, 0x00}, /* 100MHz */
136 {0x27, 0x26, 0x26, 0x0E, 0x09, 0x00, 0x00} /* 133MHz */
139 /* DMA transfer mode table */
140 /* JCHDCTM/JCHDCTS */
141 static const unsigned long JCHDCTxtbl[2][7] = {
142 {0x0A, 0x06, 0x04, 0x03, 0x01, 0x00, 0x00}, /* 100MHz */
143 {0x0E, 0x09, 0x06, 0x04, 0x02, 0x01, 0x00} /* 133MHz */
146 /* JCSTWTM/JCSTWTS */
147 static const unsigned long JCSTWTxtbl[2][7] = {
148 {0x06, 0x04, 0x03, 0x02, 0x02, 0x02, 0x00}, /* 100MHz */
149 {0x09, 0x06, 0x04, 0x02, 0x02, 0x02, 0x02} /* 133MHz */
153 static const unsigned long JCTSStbl[2][7] = {
154 {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x00}, /* 100MHz */
155 {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05} /* 133MHz */
159 static const unsigned long JCENVTtbl[2][7] = {
160 {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00}, /* 100MHz */
161 {0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02} /* 133MHz */
164 /* JCACTSELS/JCACTSELM */
165 static const unsigned long JCACTSELtbl[2][7] = {
166 {0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00}, /* 100MHz */
167 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01} /* 133MHz */
170 static const struct pci_device_id scc_pci_tbl[] = {
171 {PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SCC_ATA,
172 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
173 { } /* terminate list */
177 * scc_set_piomode - Initialize host controller PATA PIO timings
178 * @ap: Port whose timings we are configuring
181 * Set PIO mode for device.
184 * None (inherited from caller).
187 static void scc_set_piomode (struct ata_port *ap, struct ata_device *adev)
189 unsigned int pio = adev->pio_mode - XFER_PIO_0;
190 void __iomem *ctrl_base = ap->host->iomap[SCC_CTRL_BAR];
191 void __iomem *cckctrl_port = ctrl_base + SCC_CTL_CCKCTRL;
192 void __iomem *piosht_port = ctrl_base + SCC_CTL_PIOSHT;
193 void __iomem *pioct_port = ctrl_base + SCC_CTL_PIOCT;
197 reg = in_be32(cckctrl_port);
198 if (reg & CCKCTRL_ATACLKOEN)
199 offset = 1; /* 133MHz */
201 offset = 0; /* 100MHz */
203 reg = JCHSTtbl[offset][pio] << 16 | JCHHTtbl[offset][pio];
204 out_be32(piosht_port, reg);
205 reg = JCHCTtbl[offset][pio];
206 out_be32(pioct_port, reg);
210 * scc_set_dmamode - Initialize host controller PATA DMA timings
211 * @ap: Port whose timings we are configuring
213 * @udma: udma mode, 0 - 6
215 * Set UDMA mode for device.
218 * None (inherited from caller).
221 static void scc_set_dmamode (struct ata_port *ap, struct ata_device *adev)
223 unsigned int udma = adev->dma_mode;
224 unsigned int is_slave = (adev->devno != 0);
226 void __iomem *ctrl_base = ap->host->iomap[SCC_CTRL_BAR];
227 void __iomem *cckctrl_port = ctrl_base + SCC_CTL_CCKCTRL;
228 void __iomem *mdmact_port = ctrl_base + SCC_CTL_MDMACT;
229 void __iomem *mcrcst_port = ctrl_base + SCC_CTL_MCRCST;
230 void __iomem *sdmact_port = ctrl_base + SCC_CTL_SDMACT;
231 void __iomem *scrcst_port = ctrl_base + SCC_CTL_SCRCST;
232 void __iomem *udenvt_port = ctrl_base + SCC_CTL_UDENVT;
233 void __iomem *tdvhsel_port = ctrl_base + SCC_CTL_TDVHSEL;
236 if (in_be32(cckctrl_port) & CCKCTRL_ATACLKOEN)
237 offset = 1; /* 133MHz */
239 offset = 0; /* 100MHz */
241 if (speed >= XFER_UDMA_0)
242 idx = speed - XFER_UDMA_0;
247 out_be32(sdmact_port, JCHDCTxtbl[offset][idx]);
248 out_be32(scrcst_port, JCSTWTxtbl[offset][idx]);
249 out_be32(tdvhsel_port,
250 (in_be32(tdvhsel_port) & ~TDVHSEL_SLAVE) | (JCACTSELtbl[offset][idx] << 2));
252 out_be32(mdmact_port, JCHDCTxtbl[offset][idx]);
253 out_be32(mcrcst_port, JCSTWTxtbl[offset][idx]);
254 out_be32(tdvhsel_port,
255 (in_be32(tdvhsel_port) & ~TDVHSEL_MASTER) | JCACTSELtbl[offset][idx]);
257 out_be32(udenvt_port,
258 JCTSStbl[offset][idx] << 16 | JCENVTtbl[offset][idx]);
261 unsigned long scc_mode_filter(struct ata_device *adev, unsigned long mask)
263 /* errata A308 workaround: limit ATAPI UDMA mode to UDMA4 */
264 if (adev->class == ATA_DEV_ATAPI &&
265 (mask & (0xE0 << ATA_SHIFT_UDMA))) {
266 printk(KERN_INFO "%s: limit ATAPI UDMA to UDMA4\n", DRV_NAME);
267 mask &= ~(0xE0 << ATA_SHIFT_UDMA);
269 return ata_pci_default_filter(adev, mask);
273 * scc_tf_load - send taskfile registers to host controller
274 * @ap: Port to which output is sent
275 * @tf: ATA taskfile register set
277 * Note: Original code is ata_tf_load().
280 static void scc_tf_load (struct ata_port *ap, const struct ata_taskfile *tf)
282 struct ata_ioports *ioaddr = &ap->ioaddr;
283 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
285 if (tf->ctl != ap->last_ctl) {
286 out_be32(ioaddr->ctl_addr, tf->ctl);
287 ap->last_ctl = tf->ctl;
291 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
292 out_be32(ioaddr->feature_addr, tf->hob_feature);
293 out_be32(ioaddr->nsect_addr, tf->hob_nsect);
294 out_be32(ioaddr->lbal_addr, tf->hob_lbal);
295 out_be32(ioaddr->lbam_addr, tf->hob_lbam);
296 out_be32(ioaddr->lbah_addr, tf->hob_lbah);
297 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
306 out_be32(ioaddr->feature_addr, tf->feature);
307 out_be32(ioaddr->nsect_addr, tf->nsect);
308 out_be32(ioaddr->lbal_addr, tf->lbal);
309 out_be32(ioaddr->lbam_addr, tf->lbam);
310 out_be32(ioaddr->lbah_addr, tf->lbah);
311 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
319 if (tf->flags & ATA_TFLAG_DEVICE) {
320 out_be32(ioaddr->device_addr, tf->device);
321 VPRINTK("device 0x%X\n", tf->device);
328 * scc_check_status - Read device status reg & clear interrupt
329 * @ap: port where the device is
331 * Note: Original code is ata_check_status().
334 static u8 scc_check_status (struct ata_port *ap)
336 return in_be32(ap->ioaddr.status_addr);
340 * scc_tf_read - input device's ATA taskfile shadow registers
341 * @ap: Port from which input is read
342 * @tf: ATA taskfile register set for storing input
344 * Note: Original code is ata_tf_read().
347 static void scc_tf_read (struct ata_port *ap, struct ata_taskfile *tf)
349 struct ata_ioports *ioaddr = &ap->ioaddr;
351 tf->command = scc_check_status(ap);
352 tf->feature = in_be32(ioaddr->error_addr);
353 tf->nsect = in_be32(ioaddr->nsect_addr);
354 tf->lbal = in_be32(ioaddr->lbal_addr);
355 tf->lbam = in_be32(ioaddr->lbam_addr);
356 tf->lbah = in_be32(ioaddr->lbah_addr);
357 tf->device = in_be32(ioaddr->device_addr);
359 if (tf->flags & ATA_TFLAG_LBA48) {
360 out_be32(ioaddr->ctl_addr, tf->ctl | ATA_HOB);
361 tf->hob_feature = in_be32(ioaddr->error_addr);
362 tf->hob_nsect = in_be32(ioaddr->nsect_addr);
363 tf->hob_lbal = in_be32(ioaddr->lbal_addr);
364 tf->hob_lbam = in_be32(ioaddr->lbam_addr);
365 tf->hob_lbah = in_be32(ioaddr->lbah_addr);
366 out_be32(ioaddr->ctl_addr, tf->ctl);
367 ap->last_ctl = tf->ctl;
372 * scc_exec_command - issue ATA command to host controller
373 * @ap: port to which command is being issued
374 * @tf: ATA taskfile register set
376 * Note: Original code is ata_exec_command().
379 static void scc_exec_command (struct ata_port *ap,
380 const struct ata_taskfile *tf)
382 DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
384 out_be32(ap->ioaddr.command_addr, tf->command);
389 * scc_check_altstatus - Read device alternate status reg
390 * @ap: port where the device is
393 static u8 scc_check_altstatus (struct ata_port *ap)
395 return in_be32(ap->ioaddr.altstatus_addr);
399 * scc_std_dev_select - Select device 0/1 on ATA bus
400 * @ap: ATA channel to manipulate
401 * @device: ATA device (numbered from zero) to select
403 * Note: Original code is ata_std_dev_select().
406 static void scc_std_dev_select (struct ata_port *ap, unsigned int device)
411 tmp = ATA_DEVICE_OBS;
413 tmp = ATA_DEVICE_OBS | ATA_DEV1;
415 out_be32(ap->ioaddr.device_addr, tmp);
420 * scc_bmdma_setup - Set up PCI IDE BMDMA transaction
421 * @qc: Info associated with this ATA transaction.
423 * Note: Original code is ata_bmdma_setup().
426 static void scc_bmdma_setup (struct ata_queued_cmd *qc)
428 struct ata_port *ap = qc->ap;
429 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
431 void __iomem *mmio = ap->ioaddr.bmdma_addr;
433 /* load PRD table addr */
434 out_be32(mmio + SCC_DMA_TABLE_OFS, ap->prd_dma);
436 /* specify data direction, triple-check start bit is clear */
437 dmactl = in_be32(mmio + SCC_DMA_CMD);
438 dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
440 dmactl |= ATA_DMA_WR;
441 out_be32(mmio + SCC_DMA_CMD, dmactl);
443 /* issue r/w command */
444 ap->ops->exec_command(ap, &qc->tf);
448 * scc_bmdma_start - Start a PCI IDE BMDMA transaction
449 * @qc: Info associated with this ATA transaction.
451 * Note: Original code is ata_bmdma_start().
454 static void scc_bmdma_start (struct ata_queued_cmd *qc)
456 struct ata_port *ap = qc->ap;
458 void __iomem *mmio = ap->ioaddr.bmdma_addr;
460 /* start host DMA transaction */
461 dmactl = in_be32(mmio + SCC_DMA_CMD);
462 out_be32(mmio + SCC_DMA_CMD, dmactl | ATA_DMA_START);
466 * scc_devchk - PATA device presence detection
467 * @ap: ATA channel to examine
468 * @device: Device to examine (starting at zero)
470 * Note: Original code is ata_devchk().
473 static unsigned int scc_devchk (struct ata_port *ap,
476 struct ata_ioports *ioaddr = &ap->ioaddr;
479 ap->ops->dev_select(ap, device);
481 out_be32(ioaddr->nsect_addr, 0x55);
482 out_be32(ioaddr->lbal_addr, 0xaa);
484 out_be32(ioaddr->nsect_addr, 0xaa);
485 out_be32(ioaddr->lbal_addr, 0x55);
487 out_be32(ioaddr->nsect_addr, 0x55);
488 out_be32(ioaddr->lbal_addr, 0xaa);
490 nsect = in_be32(ioaddr->nsect_addr);
491 lbal = in_be32(ioaddr->lbal_addr);
493 if ((nsect == 0x55) && (lbal == 0xaa))
494 return 1; /* we found a device */
496 return 0; /* nothing found */
500 * scc_bus_post_reset - PATA device post reset
502 * Note: Original code is ata_bus_post_reset().
505 static int scc_bus_post_reset(struct ata_port *ap, unsigned int devmask,
506 unsigned long deadline)
508 struct ata_ioports *ioaddr = &ap->ioaddr;
509 unsigned int dev0 = devmask & (1 << 0);
510 unsigned int dev1 = devmask & (1 << 1);
513 /* if device 0 was found in ata_devchk, wait for its
517 rc = ata_wait_ready(ap, deadline);
518 if (rc && rc != -ENODEV)
522 /* if device 1 was found in ata_devchk, wait for
523 * register access, then wait for BSY to clear
528 ap->ops->dev_select(ap, 1);
529 nsect = in_be32(ioaddr->nsect_addr);
530 lbal = in_be32(ioaddr->lbal_addr);
531 if ((nsect == 1) && (lbal == 1))
533 if (time_after(jiffies, deadline))
535 msleep(50); /* give drive a breather */
538 rc = ata_wait_ready(ap, deadline);
539 if (rc && rc != -ENODEV)
543 /* is all this really necessary? */
544 ap->ops->dev_select(ap, 0);
546 ap->ops->dev_select(ap, 1);
548 ap->ops->dev_select(ap, 0);
554 * scc_bus_softreset - PATA device software reset
556 * Note: Original code is ata_bus_softreset().
559 static unsigned int scc_bus_softreset(struct ata_port *ap, unsigned int devmask,
560 unsigned long deadline)
562 struct ata_ioports *ioaddr = &ap->ioaddr;
564 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
566 /* software reset. causes dev0 to be selected */
567 out_be32(ioaddr->ctl_addr, ap->ctl);
569 out_be32(ioaddr->ctl_addr, ap->ctl | ATA_SRST);
571 out_be32(ioaddr->ctl_addr, ap->ctl);
573 /* wait a while before checking status */
574 ata_wait_after_reset(ap, deadline);
576 /* Before we perform post reset processing we want to see if
577 * the bus shows 0xFF because the odd clown forgets the D7
580 if (scc_check_status(ap) == 0xFF)
583 scc_bus_post_reset(ap, devmask, deadline);
589 * scc_std_softreset - reset host port via ATA SRST
591 * @classes: resulting classes of attached devices
592 * @deadline: deadline jiffies for the operation
594 * Note: Original code is ata_std_softreset().
597 static int scc_std_softreset(struct ata_link *link, unsigned int *classes,
598 unsigned long deadline)
600 struct ata_port *ap = link->ap;
601 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
602 unsigned int devmask = 0, err_mask;
607 if (ata_link_offline(link)) {
608 classes[0] = ATA_DEV_NONE;
612 /* determine if device 0/1 are present */
613 if (scc_devchk(ap, 0))
615 if (slave_possible && scc_devchk(ap, 1))
618 /* select device 0 again */
619 ap->ops->dev_select(ap, 0);
621 /* issue bus reset */
622 DPRINTK("about to softreset, devmask=%x\n", devmask);
623 err_mask = scc_bus_softreset(ap, devmask, deadline);
625 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
630 /* determine by signature whether we have ATA or ATAPI devices */
631 classes[0] = ata_dev_try_classify(&ap->link.device[0],
632 devmask & (1 << 0), &err);
633 if (slave_possible && err != 0x81)
634 classes[1] = ata_dev_try_classify(&ap->link.device[1],
635 devmask & (1 << 1), &err);
638 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
643 * scc_bmdma_stop - Stop PCI IDE BMDMA transfer
644 * @qc: Command we are ending DMA for
647 static void scc_bmdma_stop (struct ata_queued_cmd *qc)
649 struct ata_port *ap = qc->ap;
650 void __iomem *ctrl_base = ap->host->iomap[SCC_CTRL_BAR];
651 void __iomem *bmid_base = ap->host->iomap[SCC_BMID_BAR];
655 reg = in_be32(bmid_base + SCC_DMA_INTST);
657 if (reg & INTSTS_SERROR) {
658 printk(KERN_WARNING "%s: SERROR\n", DRV_NAME);
659 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_SERROR|INTSTS_BMSINT);
660 out_be32(bmid_base + SCC_DMA_CMD,
661 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
665 if (reg & INTSTS_PRERR) {
667 maea0 = in_be32(ctrl_base + SCC_CTL_MAEA0);
668 maec0 = in_be32(ctrl_base + SCC_CTL_MAEC0);
669 printk(KERN_WARNING "%s: PRERR [addr:%x cmd:%x]\n", DRV_NAME, maea0, maec0);
670 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_PRERR|INTSTS_BMSINT);
671 out_be32(bmid_base + SCC_DMA_CMD,
672 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
676 if (reg & INTSTS_RERR) {
677 printk(KERN_WARNING "%s: Response Error\n", DRV_NAME);
678 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_RERR|INTSTS_BMSINT);
679 out_be32(bmid_base + SCC_DMA_CMD,
680 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
684 if (reg & INTSTS_ICERR) {
685 out_be32(bmid_base + SCC_DMA_CMD,
686 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
687 printk(KERN_WARNING "%s: Illegal Configuration\n", DRV_NAME);
688 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_ICERR|INTSTS_BMSINT);
692 if (reg & INTSTS_BMSINT) {
693 unsigned int classes;
694 unsigned long deadline = jiffies + ATA_TMOUT_BOOT;
695 printk(KERN_WARNING "%s: Internal Bus Error\n", DRV_NAME);
696 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_BMSINT);
698 scc_std_softreset(&ap->link, &classes, deadline);
702 if (reg & INTSTS_BMHE) {
703 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_BMHE);
707 if (reg & INTSTS_ACTEINT) {
708 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_ACTEINT);
712 if (reg & INTSTS_IOIRQS) {
713 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_IOIRQS);
719 /* clear start/stop bit */
720 out_be32(bmid_base + SCC_DMA_CMD,
721 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
723 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
724 ata_altstatus(ap); /* dummy read */
728 * scc_bmdma_status - Read PCI IDE BMDMA status
729 * @ap: Port associated with this ATA transaction.
732 static u8 scc_bmdma_status (struct ata_port *ap)
734 void __iomem *mmio = ap->ioaddr.bmdma_addr;
735 u8 host_stat = in_be32(mmio + SCC_DMA_STATUS);
736 u32 int_status = in_be32(mmio + SCC_DMA_INTST);
737 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
738 static int retry = 0;
740 /* return if IOS_SS is cleared */
741 if (!(in_be32(mmio + SCC_DMA_CMD) & ATA_DMA_START))
744 /* errata A252,A308 workaround: Step4 */
745 if ((ata_altstatus(ap) & ATA_ERR) && (int_status & INTSTS_INTRQ))
746 return (host_stat | ATA_DMA_INTR);
748 /* errata A308 workaround Step5 */
749 if (int_status & INTSTS_IOIRQS) {
750 host_stat |= ATA_DMA_INTR;
752 /* We don't check ATAPI DMA because it is limited to UDMA4 */
753 if ((qc->tf.protocol == ATA_PROT_DMA &&
754 qc->dev->xfer_mode > XFER_UDMA_4)) {
755 if (!(int_status & INTSTS_ACTEINT)) {
756 printk(KERN_WARNING "ata%u: operation failed (transfer data loss)\n",
758 host_stat |= ATA_DMA_ERR;
760 ap->udma_mask &= ~(1 << qc->dev->xfer_mode);
770 * scc_data_xfer - Transfer data by PIO
771 * @dev: device for this I/O
773 * @buflen: buffer length
776 * Note: Original code is ata_data_xfer().
779 static unsigned int scc_data_xfer (struct ata_device *dev, unsigned char *buf,
780 unsigned int buflen, int rw)
782 struct ata_port *ap = dev->link->ap;
783 unsigned int words = buflen >> 1;
785 __le16 *buf16 = (__le16 *) buf;
786 void __iomem *mmio = ap->ioaddr.data_addr;
788 /* Transfer multiple of 2 bytes */
790 for (i = 0; i < words; i++)
791 buf16[i] = cpu_to_le16(in_be32(mmio));
793 for (i = 0; i < words; i++)
794 out_be32(mmio, le16_to_cpu(buf16[i]));
796 /* Transfer trailing 1 byte, if any. */
797 if (unlikely(buflen & 0x01)) {
798 __le16 align_buf[1] = { 0 };
799 unsigned char *trailing_buf = buf + buflen - 1;
802 align_buf[0] = cpu_to_le16(in_be32(mmio));
803 memcpy(trailing_buf, align_buf, 1);
805 memcpy(align_buf, trailing_buf, 1);
806 out_be32(mmio, le16_to_cpu(align_buf[0]));
815 * scc_irq_on - Enable interrupts on a port.
816 * @ap: Port on which interrupts are enabled.
818 * Note: Original code is ata_irq_on().
821 static u8 scc_irq_on (struct ata_port *ap)
823 struct ata_ioports *ioaddr = &ap->ioaddr;
826 ap->ctl &= ~ATA_NIEN;
827 ap->last_ctl = ap->ctl;
829 out_be32(ioaddr->ctl_addr, ap->ctl);
830 tmp = ata_wait_idle(ap);
832 ap->ops->irq_clear(ap);
838 * scc_bmdma_freeze - Freeze BMDMA controller port
839 * @ap: port to freeze
841 * Note: Original code is ata_bmdma_freeze().
844 static void scc_bmdma_freeze (struct ata_port *ap)
846 struct ata_ioports *ioaddr = &ap->ioaddr;
849 ap->last_ctl = ap->ctl;
851 out_be32(ioaddr->ctl_addr, ap->ctl);
853 /* Under certain circumstances, some controllers raise IRQ on
854 * ATA_NIEN manipulation. Also, many controllers fail to mask
855 * previously pending IRQ on ATA_NIEN assertion. Clear it.
857 ap->ops->check_status(ap);
859 ap->ops->irq_clear(ap);
863 * scc_pata_prereset - prepare for reset
864 * @ap: ATA port to be reset
865 * @deadline: deadline jiffies for the operation
868 static int scc_pata_prereset(struct ata_link *link, unsigned long deadline)
870 link->ap->cbl = ATA_CBL_PATA80;
871 return ata_std_prereset(link, deadline);
875 * scc_std_postreset - standard postreset callback
876 * @ap: the target ata_port
877 * @classes: classes of attached devices
879 * Note: Original code is ata_std_postreset().
882 static void scc_std_postreset(struct ata_link *link, unsigned int *classes)
884 struct ata_port *ap = link->ap;
888 /* is double-select really necessary? */
889 if (classes[0] != ATA_DEV_NONE)
890 ap->ops->dev_select(ap, 1);
891 if (classes[1] != ATA_DEV_NONE)
892 ap->ops->dev_select(ap, 0);
894 /* bail out if no device is present */
895 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
896 DPRINTK("EXIT, no device\n");
900 /* set up device control */
901 if (ap->ioaddr.ctl_addr)
902 out_be32(ap->ioaddr.ctl_addr, ap->ctl);
908 * scc_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
909 * @ap: Port associated with this ATA transaction.
911 * Note: Original code is ata_bmdma_irq_clear().
914 static void scc_bmdma_irq_clear (struct ata_port *ap)
916 void __iomem *mmio = ap->ioaddr.bmdma_addr;
921 out_be32(mmio + SCC_DMA_STATUS, in_be32(mmio + SCC_DMA_STATUS));
925 * scc_port_start - Set port up for dma.
926 * @ap: Port to initialize
928 * Allocate space for PRD table using ata_port_start().
929 * Set PRD table address for PTERADD. (PRD Transfer End Read)
932 static int scc_port_start (struct ata_port *ap)
934 void __iomem *mmio = ap->ioaddr.bmdma_addr;
937 rc = ata_port_start(ap);
941 out_be32(mmio + SCC_DMA_PTERADD, ap->prd_dma);
946 * scc_port_stop - Undo scc_port_start()
947 * @ap: Port to shut down
952 static void scc_port_stop (struct ata_port *ap)
954 void __iomem *mmio = ap->ioaddr.bmdma_addr;
956 out_be32(mmio + SCC_DMA_PTERADD, 0);
959 static struct scsi_host_template scc_sht = {
960 ATA_BMDMA_SHT(DRV_NAME),
963 static struct ata_port_operations scc_pata_ops = {
964 .inherits = &ata_bmdma_port_ops,
966 .set_piomode = scc_set_piomode,
967 .set_dmamode = scc_set_dmamode,
968 .mode_filter = scc_mode_filter,
970 .tf_load = scc_tf_load,
971 .tf_read = scc_tf_read,
972 .exec_command = scc_exec_command,
973 .check_status = scc_check_status,
974 .check_altstatus = scc_check_altstatus,
975 .dev_select = scc_std_dev_select,
977 .bmdma_setup = scc_bmdma_setup,
978 .bmdma_start = scc_bmdma_start,
979 .bmdma_stop = scc_bmdma_stop,
980 .bmdma_status = scc_bmdma_status,
981 .data_xfer = scc_data_xfer,
983 .freeze = scc_bmdma_freeze,
984 .prereset = scc_pata_prereset,
985 .softreset = scc_std_softreset,
986 .postreset = scc_std_postreset,
987 .post_internal_cmd = scc_bmdma_stop,
989 .irq_clear = scc_bmdma_irq_clear,
990 .irq_on = scc_irq_on,
992 .port_start = scc_port_start,
993 .port_stop = scc_port_stop,
996 static struct ata_port_info scc_port_info[] = {
998 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_MMIO | ATA_FLAG_NO_LEGACY,
999 .pio_mask = 0x1f, /* pio0-4 */
1001 .udma_mask = ATA_UDMA6,
1002 .port_ops = &scc_pata_ops,
1007 * scc_reset_controller - initialize SCC PATA controller.
1010 static int scc_reset_controller(struct ata_host *host)
1012 void __iomem *ctrl_base = host->iomap[SCC_CTRL_BAR];
1013 void __iomem *bmid_base = host->iomap[SCC_BMID_BAR];
1014 void __iomem *cckctrl_port = ctrl_base + SCC_CTL_CCKCTRL;
1015 void __iomem *mode_port = ctrl_base + SCC_CTL_MODEREG;
1016 void __iomem *ecmode_port = ctrl_base + SCC_CTL_ECMODE;
1017 void __iomem *intmask_port = bmid_base + SCC_DMA_INTMASK;
1018 void __iomem *dmastatus_port = bmid_base + SCC_DMA_STATUS;
1021 out_be32(cckctrl_port, reg);
1022 reg |= CCKCTRL_ATACLKOEN;
1023 out_be32(cckctrl_port, reg);
1024 reg |= CCKCTRL_LCLKEN | CCKCTRL_OCLKEN;
1025 out_be32(cckctrl_port, reg);
1026 reg |= CCKCTRL_CRST;
1027 out_be32(cckctrl_port, reg);
1030 reg = in_be32(cckctrl_port);
1031 if (reg & CCKCTRL_CRST)
1036 reg |= CCKCTRL_ATARESET;
1037 out_be32(cckctrl_port, reg);
1038 out_be32(ecmode_port, ECMODE_VALUE);
1039 out_be32(mode_port, MODE_JCUSFEN);
1040 out_be32(intmask_port, INTMASK_MSK);
1042 if (in_be32(dmastatus_port) & QCHSD_STPDIAG) {
1043 printk(KERN_WARNING "%s: failed to detect 80c cable. (PDIAG# is high)\n", DRV_NAME);
1051 * scc_setup_ports - initialize ioaddr with SCC PATA port offsets.
1052 * @ioaddr: IO address structure to be initialized
1053 * @base: base address of BMID region
1056 static void scc_setup_ports (struct ata_ioports *ioaddr, void __iomem *base)
1058 ioaddr->cmd_addr = base + SCC_REG_CMD_ADDR;
1059 ioaddr->altstatus_addr = ioaddr->cmd_addr + SCC_REG_ALTSTATUS;
1060 ioaddr->ctl_addr = ioaddr->cmd_addr + SCC_REG_ALTSTATUS;
1061 ioaddr->bmdma_addr = base;
1062 ioaddr->data_addr = ioaddr->cmd_addr + SCC_REG_DATA;
1063 ioaddr->error_addr = ioaddr->cmd_addr + SCC_REG_ERR;
1064 ioaddr->feature_addr = ioaddr->cmd_addr + SCC_REG_FEATURE;
1065 ioaddr->nsect_addr = ioaddr->cmd_addr + SCC_REG_NSECT;
1066 ioaddr->lbal_addr = ioaddr->cmd_addr + SCC_REG_LBAL;
1067 ioaddr->lbam_addr = ioaddr->cmd_addr + SCC_REG_LBAM;
1068 ioaddr->lbah_addr = ioaddr->cmd_addr + SCC_REG_LBAH;
1069 ioaddr->device_addr = ioaddr->cmd_addr + SCC_REG_DEVICE;
1070 ioaddr->status_addr = ioaddr->cmd_addr + SCC_REG_STATUS;
1071 ioaddr->command_addr = ioaddr->cmd_addr + SCC_REG_CMD;
1074 static int scc_host_init(struct ata_host *host)
1076 struct pci_dev *pdev = to_pci_dev(host->dev);
1079 rc = scc_reset_controller(host);
1083 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1086 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1090 scc_setup_ports(&host->ports[0]->ioaddr, host->iomap[SCC_BMID_BAR]);
1092 pci_set_master(pdev);
1098 * scc_init_one - Register SCC PATA device with kernel services
1099 * @pdev: PCI device to register
1100 * @ent: Entry in scc_pci_tbl matching with @pdev
1103 * Inherited from PCI layer (may sleep).
1106 * Zero on success, or -ERRNO value.
1109 static int scc_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1111 static int printed_version;
1112 unsigned int board_idx = (unsigned int) ent->driver_data;
1113 const struct ata_port_info *ppi[] = { &scc_port_info[board_idx], NULL };
1114 struct ata_host *host;
1117 if (!printed_version++)
1118 dev_printk(KERN_DEBUG, &pdev->dev,
1119 "version " DRV_VERSION "\n");
1121 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1);
1125 rc = pcim_enable_device(pdev);
1129 rc = pcim_iomap_regions(pdev, (1 << SCC_CTRL_BAR) | (1 << SCC_BMID_BAR), DRV_NAME);
1131 pcim_pin_device(pdev);
1134 host->iomap = pcim_iomap_table(pdev);
1136 ata_port_pbar_desc(host->ports[0], SCC_CTRL_BAR, -1, "ctrl");
1137 ata_port_pbar_desc(host->ports[0], SCC_BMID_BAR, -1, "bmid");
1139 rc = scc_host_init(host);
1143 return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
1147 static struct pci_driver scc_pci_driver = {
1149 .id_table = scc_pci_tbl,
1150 .probe = scc_init_one,
1151 .remove = ata_pci_remove_one,
1153 .suspend = ata_pci_device_suspend,
1154 .resume = ata_pci_device_resume,
1158 static int __init scc_init (void)
1162 DPRINTK("pci_register_driver\n");
1163 rc = pci_register_driver(&scc_pci_driver);
1171 static void __exit scc_exit (void)
1173 pci_unregister_driver(&scc_pci_driver);
1176 module_init(scc_init);
1177 module_exit(scc_exit);
1179 MODULE_AUTHOR("Toshiba corp");
1180 MODULE_DESCRIPTION("SCSI low-level driver for Toshiba SCC PATA controller");
1181 MODULE_LICENSE("GPL");
1182 MODULE_DEVICE_TABLE(pci, scc_pci_tbl);
1183 MODULE_VERSION(DRV_VERSION);