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 "0.1"
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]);
262 * scc_tf_load - send taskfile registers to host controller
263 * @ap: Port to which output is sent
264 * @tf: ATA taskfile register set
266 * Note: Original code is ata_tf_load().
269 static void scc_tf_load (struct ata_port *ap, const struct ata_taskfile *tf)
271 struct ata_ioports *ioaddr = &ap->ioaddr;
272 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
274 if (tf->ctl != ap->last_ctl) {
275 out_be32(ioaddr->ctl_addr, tf->ctl);
276 ap->last_ctl = tf->ctl;
280 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
281 out_be32(ioaddr->feature_addr, tf->hob_feature);
282 out_be32(ioaddr->nsect_addr, tf->hob_nsect);
283 out_be32(ioaddr->lbal_addr, tf->hob_lbal);
284 out_be32(ioaddr->lbam_addr, tf->hob_lbam);
285 out_be32(ioaddr->lbah_addr, tf->hob_lbah);
286 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
295 out_be32(ioaddr->feature_addr, tf->feature);
296 out_be32(ioaddr->nsect_addr, tf->nsect);
297 out_be32(ioaddr->lbal_addr, tf->lbal);
298 out_be32(ioaddr->lbam_addr, tf->lbam);
299 out_be32(ioaddr->lbah_addr, tf->lbah);
300 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
308 if (tf->flags & ATA_TFLAG_DEVICE) {
309 out_be32(ioaddr->device_addr, tf->device);
310 VPRINTK("device 0x%X\n", tf->device);
317 * scc_check_status - Read device status reg & clear interrupt
318 * @ap: port where the device is
320 * Note: Original code is ata_check_status().
323 static u8 scc_check_status (struct ata_port *ap)
325 return in_be32(ap->ioaddr.status_addr);
329 * scc_tf_read - input device's ATA taskfile shadow registers
330 * @ap: Port from which input is read
331 * @tf: ATA taskfile register set for storing input
333 * Note: Original code is ata_tf_read().
336 static void scc_tf_read (struct ata_port *ap, struct ata_taskfile *tf)
338 struct ata_ioports *ioaddr = &ap->ioaddr;
340 tf->command = scc_check_status(ap);
341 tf->feature = in_be32(ioaddr->error_addr);
342 tf->nsect = in_be32(ioaddr->nsect_addr);
343 tf->lbal = in_be32(ioaddr->lbal_addr);
344 tf->lbam = in_be32(ioaddr->lbam_addr);
345 tf->lbah = in_be32(ioaddr->lbah_addr);
346 tf->device = in_be32(ioaddr->device_addr);
348 if (tf->flags & ATA_TFLAG_LBA48) {
349 out_be32(ioaddr->ctl_addr, tf->ctl | ATA_HOB);
350 tf->hob_feature = in_be32(ioaddr->error_addr);
351 tf->hob_nsect = in_be32(ioaddr->nsect_addr);
352 tf->hob_lbal = in_be32(ioaddr->lbal_addr);
353 tf->hob_lbam = in_be32(ioaddr->lbam_addr);
354 tf->hob_lbah = in_be32(ioaddr->lbah_addr);
359 * scc_exec_command - issue ATA command to host controller
360 * @ap: port to which command is being issued
361 * @tf: ATA taskfile register set
363 * Note: Original code is ata_exec_command().
366 static void scc_exec_command (struct ata_port *ap,
367 const struct ata_taskfile *tf)
369 DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command);
371 out_be32(ap->ioaddr.command_addr, tf->command);
376 * scc_check_altstatus - Read device alternate status reg
377 * @ap: port where the device is
380 static u8 scc_check_altstatus (struct ata_port *ap)
382 return in_be32(ap->ioaddr.altstatus_addr);
386 * scc_std_dev_select - Select device 0/1 on ATA bus
387 * @ap: ATA channel to manipulate
388 * @device: ATA device (numbered from zero) to select
390 * Note: Original code is ata_std_dev_select().
393 static void scc_std_dev_select (struct ata_port *ap, unsigned int device)
398 tmp = ATA_DEVICE_OBS;
400 tmp = ATA_DEVICE_OBS | ATA_DEV1;
402 out_be32(ap->ioaddr.device_addr, tmp);
407 * scc_bmdma_setup - Set up PCI IDE BMDMA transaction
408 * @qc: Info associated with this ATA transaction.
410 * Note: Original code is ata_bmdma_setup().
413 static void scc_bmdma_setup (struct ata_queued_cmd *qc)
415 struct ata_port *ap = qc->ap;
416 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
418 void __iomem *mmio = ap->ioaddr.bmdma_addr;
420 /* load PRD table addr */
421 out_be32(mmio + SCC_DMA_TABLE_OFS, ap->prd_dma);
423 /* specify data direction, triple-check start bit is clear */
424 dmactl = in_be32(mmio + SCC_DMA_CMD);
425 dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
427 dmactl |= ATA_DMA_WR;
428 out_be32(mmio + SCC_DMA_CMD, dmactl);
430 /* issue r/w command */
431 ap->ops->exec_command(ap, &qc->tf);
435 * scc_bmdma_start - Start a PCI IDE BMDMA transaction
436 * @qc: Info associated with this ATA transaction.
438 * Note: Original code is ata_bmdma_start().
441 static void scc_bmdma_start (struct ata_queued_cmd *qc)
443 struct ata_port *ap = qc->ap;
445 void __iomem *mmio = ap->ioaddr.bmdma_addr;
447 /* start host DMA transaction */
448 dmactl = in_be32(mmio + SCC_DMA_CMD);
449 out_be32(mmio + SCC_DMA_CMD, dmactl | ATA_DMA_START);
453 * scc_devchk - PATA device presence detection
454 * @ap: ATA channel to examine
455 * @device: Device to examine (starting at zero)
457 * Note: Original code is ata_devchk().
460 static unsigned int scc_devchk (struct ata_port *ap,
463 struct ata_ioports *ioaddr = &ap->ioaddr;
466 ap->ops->dev_select(ap, device);
468 out_be32(ioaddr->nsect_addr, 0x55);
469 out_be32(ioaddr->lbal_addr, 0xaa);
471 out_be32(ioaddr->nsect_addr, 0xaa);
472 out_be32(ioaddr->lbal_addr, 0x55);
474 out_be32(ioaddr->nsect_addr, 0x55);
475 out_be32(ioaddr->lbal_addr, 0xaa);
477 nsect = in_be32(ioaddr->nsect_addr);
478 lbal = in_be32(ioaddr->lbal_addr);
480 if ((nsect == 0x55) && (lbal == 0xaa))
481 return 1; /* we found a device */
483 return 0; /* nothing found */
487 * scc_bus_post_reset - PATA device post reset
489 * Note: Original code is ata_bus_post_reset().
492 static void scc_bus_post_reset (struct ata_port *ap, unsigned int devmask)
494 struct ata_ioports *ioaddr = &ap->ioaddr;
495 unsigned int dev0 = devmask & (1 << 0);
496 unsigned int dev1 = devmask & (1 << 1);
497 unsigned long timeout;
499 /* if device 0 was found in ata_devchk, wait for its
503 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
505 /* if device 1 was found in ata_devchk, wait for
506 * register access, then wait for BSY to clear
508 timeout = jiffies + ATA_TMOUT_BOOT;
512 ap->ops->dev_select(ap, 1);
513 nsect = in_be32(ioaddr->nsect_addr);
514 lbal = in_be32(ioaddr->lbal_addr);
515 if ((nsect == 1) && (lbal == 1))
517 if (time_after(jiffies, timeout)) {
521 msleep(50); /* give drive a breather */
524 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
526 /* is all this really necessary? */
527 ap->ops->dev_select(ap, 0);
529 ap->ops->dev_select(ap, 1);
531 ap->ops->dev_select(ap, 0);
535 * scc_bus_softreset - PATA device software reset
537 * Note: Original code is ata_bus_softreset().
540 static unsigned int scc_bus_softreset (struct ata_port *ap,
541 unsigned int devmask)
543 struct ata_ioports *ioaddr = &ap->ioaddr;
545 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
547 /* software reset. causes dev0 to be selected */
548 out_be32(ioaddr->ctl_addr, ap->ctl);
550 out_be32(ioaddr->ctl_addr, ap->ctl | ATA_SRST);
552 out_be32(ioaddr->ctl_addr, ap->ctl);
554 /* spec mandates ">= 2ms" before checking status.
555 * We wait 150ms, because that was the magic delay used for
556 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
557 * between when the ATA command register is written, and then
558 * status is checked. Because waiting for "a while" before
559 * checking status is fine, post SRST, we perform this magic
560 * delay here as well.
562 * Old drivers/ide uses the 2mS rule and then waits for ready
566 /* Before we perform post reset processing we want to see if
567 * the bus shows 0xFF because the odd clown forgets the D7
570 if (scc_check_status(ap) == 0xFF)
573 scc_bus_post_reset(ap, devmask);
579 * scc_std_softreset - reset host port via ATA SRST
581 * @classes: resulting classes of attached devices
583 * Note: Original code is ata_std_softreset().
586 static int scc_std_softreset (struct ata_port *ap, unsigned int *classes)
588 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
589 unsigned int devmask = 0, err_mask;
594 if (ata_port_offline(ap)) {
595 classes[0] = ATA_DEV_NONE;
599 /* determine if device 0/1 are present */
600 if (scc_devchk(ap, 0))
602 if (slave_possible && scc_devchk(ap, 1))
605 /* select device 0 again */
606 ap->ops->dev_select(ap, 0);
608 /* issue bus reset */
609 DPRINTK("about to softreset, devmask=%x\n", devmask);
610 err_mask = scc_bus_softreset(ap, devmask);
612 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
617 /* determine by signature whether we have ATA or ATAPI devices */
618 classes[0] = ata_dev_try_classify(ap, 0, &err);
619 if (slave_possible && err != 0x81)
620 classes[1] = ata_dev_try_classify(ap, 1, &err);
623 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
628 * scc_bmdma_stop - Stop PCI IDE BMDMA transfer
629 * @qc: Command we are ending DMA for
632 static void scc_bmdma_stop (struct ata_queued_cmd *qc)
634 struct ata_port *ap = qc->ap;
635 void __iomem *ctrl_base = ap->host->iomap[SCC_CTRL_BAR];
636 void __iomem *bmid_base = ap->host->iomap[SCC_BMID_BAR];
640 reg = in_be32(bmid_base + SCC_DMA_INTST);
642 if (reg & INTSTS_SERROR) {
643 printk(KERN_WARNING "%s: SERROR\n", DRV_NAME);
644 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_SERROR|INTSTS_BMSINT);
645 out_be32(bmid_base + SCC_DMA_CMD,
646 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
650 if (reg & INTSTS_PRERR) {
652 maea0 = in_be32(ctrl_base + SCC_CTL_MAEA0);
653 maec0 = in_be32(ctrl_base + SCC_CTL_MAEC0);
654 printk(KERN_WARNING "%s: PRERR [addr:%x cmd:%x]\n", DRV_NAME, maea0, maec0);
655 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_PRERR|INTSTS_BMSINT);
656 out_be32(bmid_base + SCC_DMA_CMD,
657 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
661 if (reg & INTSTS_RERR) {
662 printk(KERN_WARNING "%s: Response Error\n", DRV_NAME);
663 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_RERR|INTSTS_BMSINT);
664 out_be32(bmid_base + SCC_DMA_CMD,
665 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
669 if (reg & INTSTS_ICERR) {
670 out_be32(bmid_base + SCC_DMA_CMD,
671 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
672 printk(KERN_WARNING "%s: Illegal Configuration\n", DRV_NAME);
673 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_ICERR|INTSTS_BMSINT);
677 if (reg & INTSTS_BMSINT) {
678 unsigned int classes;
679 printk(KERN_WARNING "%s: Internal Bus Error\n", DRV_NAME);
680 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_BMSINT);
682 scc_std_softreset(ap, &classes);
686 if (reg & INTSTS_BMHE) {
687 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_BMHE);
691 if (reg & INTSTS_ACTEINT) {
692 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_ACTEINT);
696 if (reg & INTSTS_IOIRQS) {
697 out_be32(bmid_base + SCC_DMA_INTST, INTSTS_IOIRQS);
703 /* clear start/stop bit */
704 out_be32(bmid_base + SCC_DMA_CMD,
705 in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
707 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
708 ata_altstatus(ap); /* dummy read */
712 * scc_bmdma_status - Read PCI IDE BMDMA status
713 * @ap: Port associated with this ATA transaction.
716 static u8 scc_bmdma_status (struct ata_port *ap)
719 void __iomem *mmio = ap->ioaddr.bmdma_addr;
721 host_stat = in_be32(mmio + SCC_DMA_STATUS);
723 /* Workaround for PTERADD: emulate DMA_INTR when
724 * - IDE_STATUS[ERR] = 1
725 * - INT_STATUS[INTRQ] = 1
726 * - DMA_STATUS[IORACTA] = 1
728 if (!(host_stat & ATA_DMA_INTR)) {
729 u32 int_status = in_be32(mmio + SCC_DMA_INTST);
730 if (ata_altstatus(ap) & ATA_ERR &&
731 int_status & INTSTS_INTRQ &&
732 host_stat & ATA_DMA_ACTIVE)
733 host_stat |= ATA_DMA_INTR;
740 * scc_data_xfer - Transfer data by PIO
741 * @adev: device for this I/O
743 * @buflen: buffer length
744 * @write_data: read/write
746 * Note: Original code is ata_data_xfer().
749 static void scc_data_xfer (struct ata_device *adev, unsigned char *buf,
750 unsigned int buflen, int write_data)
752 struct ata_port *ap = adev->ap;
753 unsigned int words = buflen >> 1;
755 u16 *buf16 = (u16 *) buf;
756 void __iomem *mmio = ap->ioaddr.data_addr;
758 /* Transfer multiple of 2 bytes */
760 for (i = 0; i < words; i++)
761 out_be32(mmio, cpu_to_le16(buf16[i]));
763 for (i = 0; i < words; i++)
764 buf16[i] = le16_to_cpu(in_be32(mmio));
767 /* Transfer trailing 1 byte, if any. */
768 if (unlikely(buflen & 0x01)) {
769 u16 align_buf[1] = { 0 };
770 unsigned char *trailing_buf = buf + buflen - 1;
773 memcpy(align_buf, trailing_buf, 1);
774 out_be32(mmio, cpu_to_le16(align_buf[0]));
776 align_buf[0] = le16_to_cpu(in_be32(mmio));
777 memcpy(trailing_buf, align_buf, 1);
783 * scc_irq_on - Enable interrupts on a port.
784 * @ap: Port on which interrupts are enabled.
786 * Note: Original code is ata_irq_on().
789 static u8 scc_irq_on (struct ata_port *ap)
791 struct ata_ioports *ioaddr = &ap->ioaddr;
794 ap->ctl &= ~ATA_NIEN;
795 ap->last_ctl = ap->ctl;
797 out_be32(ioaddr->ctl_addr, ap->ctl);
798 tmp = ata_wait_idle(ap);
800 ap->ops->irq_clear(ap);
806 * scc_irq_ack - Acknowledge a device interrupt.
807 * @ap: Port on which interrupts are enabled.
809 * Note: Original code is ata_irq_ack().
812 static u8 scc_irq_ack (struct ata_port *ap, unsigned int chk_drq)
814 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
815 u8 host_stat, post_stat, status;
817 status = ata_busy_wait(ap, bits, 1000);
820 printk(KERN_ERR "abnormal status 0x%X\n", status);
822 /* get controller status; clear intr, err bits */
823 host_stat = in_be32(ap->ioaddr.bmdma_addr + SCC_DMA_STATUS);
824 out_be32(ap->ioaddr.bmdma_addr + SCC_DMA_STATUS,
825 host_stat | ATA_DMA_INTR | ATA_DMA_ERR);
827 post_stat = in_be32(ap->ioaddr.bmdma_addr + SCC_DMA_STATUS);
829 if (ata_msg_intr(ap))
830 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
832 host_stat, post_stat, status);
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.
859 ap->ops->irq_clear(ap);
863 * scc_pata_prereset - prepare for reset
864 * @ap: ATA port to be reset
867 static int scc_pata_prereset (struct ata_port *ap)
869 ap->cbl = ATA_CBL_PATA80;
870 return ata_std_prereset(ap);
874 * scc_std_postreset - standard postreset callback
875 * @ap: the target ata_port
876 * @classes: classes of attached devices
878 * Note: Original code is ata_std_postreset().
881 static void scc_std_postreset (struct ata_port *ap, unsigned int *classes)
885 /* re-enable interrupts */
886 if (!ap->ops->error_handler)
889 /* is double-select really necessary? */
890 if (classes[0] != ATA_DEV_NONE)
891 ap->ops->dev_select(ap, 1);
892 if (classes[1] != ATA_DEV_NONE)
893 ap->ops->dev_select(ap, 0);
895 /* bail out if no device is present */
896 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
897 DPRINTK("EXIT, no device\n");
901 /* set up device control */
902 if (ap->ioaddr.ctl_addr)
903 out_be32(ap->ioaddr.ctl_addr, ap->ctl);
909 * scc_error_handler - Stock error handler for BMDMA controller
910 * @ap: port to handle error for
913 static void scc_error_handler (struct ata_port *ap)
915 ata_bmdma_drive_eh(ap, scc_pata_prereset, scc_std_softreset, NULL,
920 * scc_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
921 * @ap: Port associated with this ATA transaction.
923 * Note: Original code is ata_bmdma_irq_clear().
926 static void scc_bmdma_irq_clear (struct ata_port *ap)
928 void __iomem *mmio = ap->ioaddr.bmdma_addr;
933 out_be32(mmio + SCC_DMA_STATUS, in_be32(mmio + SCC_DMA_STATUS));
937 * scc_port_start - Set port up for dma.
938 * @ap: Port to initialize
940 * Allocate space for PRD table using ata_port_start().
941 * Set PRD table address for PTERADD. (PRD Transfer End Read)
944 static int scc_port_start (struct ata_port *ap)
946 void __iomem *mmio = ap->ioaddr.bmdma_addr;
949 rc = ata_port_start(ap);
953 out_be32(mmio + SCC_DMA_PTERADD, ap->prd_dma);
958 * scc_port_stop - Undo scc_port_start()
959 * @ap: Port to shut down
964 static void scc_port_stop (struct ata_port *ap)
966 void __iomem *mmio = ap->ioaddr.bmdma_addr;
968 out_be32(mmio + SCC_DMA_PTERADD, 0);
971 static struct scsi_host_template scc_sht = {
972 .module = THIS_MODULE,
974 .ioctl = ata_scsi_ioctl,
975 .queuecommand = ata_scsi_queuecmd,
976 .can_queue = ATA_DEF_QUEUE,
977 .this_id = ATA_SHT_THIS_ID,
978 .sg_tablesize = LIBATA_MAX_PRD,
979 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
980 .emulated = ATA_SHT_EMULATED,
981 .use_clustering = ATA_SHT_USE_CLUSTERING,
982 .proc_name = DRV_NAME,
983 .dma_boundary = ATA_DMA_BOUNDARY,
984 .slave_configure = ata_scsi_slave_config,
985 .slave_destroy = ata_scsi_slave_destroy,
986 .bios_param = ata_std_bios_param,
987 .resume = ata_scsi_device_resume,
988 .suspend = ata_scsi_device_suspend,
991 static const struct ata_port_operations scc_pata_ops = {
992 .port_disable = ata_port_disable,
993 .set_piomode = scc_set_piomode,
994 .set_dmamode = scc_set_dmamode,
995 .mode_filter = ata_pci_default_filter,
997 .tf_load = scc_tf_load,
998 .tf_read = scc_tf_read,
999 .exec_command = scc_exec_command,
1000 .check_status = scc_check_status,
1001 .check_altstatus = scc_check_altstatus,
1002 .dev_select = scc_std_dev_select,
1004 .bmdma_setup = scc_bmdma_setup,
1005 .bmdma_start = scc_bmdma_start,
1006 .bmdma_stop = scc_bmdma_stop,
1007 .bmdma_status = scc_bmdma_status,
1008 .data_xfer = scc_data_xfer,
1010 .qc_prep = ata_qc_prep,
1011 .qc_issue = ata_qc_issue_prot,
1013 .freeze = scc_bmdma_freeze,
1014 .error_handler = scc_error_handler,
1015 .post_internal_cmd = scc_bmdma_stop,
1017 .irq_handler = ata_interrupt,
1018 .irq_clear = scc_bmdma_irq_clear,
1019 .irq_on = scc_irq_on,
1020 .irq_ack = scc_irq_ack,
1022 .port_start = scc_port_start,
1023 .port_stop = scc_port_stop,
1026 static struct ata_port_info scc_port_info[] = {
1029 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_MMIO | ATA_FLAG_NO_LEGACY,
1030 .pio_mask = 0x1f, /* pio0-4 */
1032 .udma_mask = ATA_UDMA6,
1033 .port_ops = &scc_pata_ops,
1038 * scc_reset_controller - initialize SCC PATA controller.
1041 static int scc_reset_controller(struct ata_probe_ent *probe_ent)
1043 void __iomem *ctrl_base = probe_ent->iomap[SCC_CTRL_BAR];
1044 void __iomem *bmid_base = probe_ent->iomap[SCC_BMID_BAR];
1045 void __iomem *cckctrl_port = ctrl_base + SCC_CTL_CCKCTRL;
1046 void __iomem *mode_port = ctrl_base + SCC_CTL_MODEREG;
1047 void __iomem *ecmode_port = ctrl_base + SCC_CTL_ECMODE;
1048 void __iomem *intmask_port = bmid_base + SCC_DMA_INTMASK;
1049 void __iomem *dmastatus_port = bmid_base + SCC_DMA_STATUS;
1052 out_be32(cckctrl_port, reg);
1053 reg |= CCKCTRL_ATACLKOEN;
1054 out_be32(cckctrl_port, reg);
1055 reg |= CCKCTRL_LCLKEN | CCKCTRL_OCLKEN;
1056 out_be32(cckctrl_port, reg);
1057 reg |= CCKCTRL_CRST;
1058 out_be32(cckctrl_port, reg);
1061 reg = in_be32(cckctrl_port);
1062 if (reg & CCKCTRL_CRST)
1067 reg |= CCKCTRL_ATARESET;
1068 out_be32(cckctrl_port, reg);
1069 out_be32(ecmode_port, ECMODE_VALUE);
1070 out_be32(mode_port, MODE_JCUSFEN);
1071 out_be32(intmask_port, INTMASK_MSK);
1073 if (in_be32(dmastatus_port) & QCHSD_STPDIAG) {
1074 printk(KERN_WARNING "%s: failed to detect 80c cable. (PDIAG# is high)\n", DRV_NAME);
1082 * scc_setup_ports - initialize ioaddr with SCC PATA port offsets.
1083 * @ioaddr: IO address structure to be initialized
1084 * @base: base address of BMID region
1087 static void scc_setup_ports (struct ata_ioports *ioaddr, void __iomem *base)
1089 ioaddr->cmd_addr = base + SCC_REG_CMD_ADDR;
1090 ioaddr->altstatus_addr = ioaddr->cmd_addr + SCC_REG_ALTSTATUS;
1091 ioaddr->ctl_addr = ioaddr->cmd_addr + SCC_REG_ALTSTATUS;
1092 ioaddr->bmdma_addr = base;
1093 ioaddr->data_addr = ioaddr->cmd_addr + SCC_REG_DATA;
1094 ioaddr->error_addr = ioaddr->cmd_addr + SCC_REG_ERR;
1095 ioaddr->feature_addr = ioaddr->cmd_addr + SCC_REG_FEATURE;
1096 ioaddr->nsect_addr = ioaddr->cmd_addr + SCC_REG_NSECT;
1097 ioaddr->lbal_addr = ioaddr->cmd_addr + SCC_REG_LBAL;
1098 ioaddr->lbam_addr = ioaddr->cmd_addr + SCC_REG_LBAM;
1099 ioaddr->lbah_addr = ioaddr->cmd_addr + SCC_REG_LBAH;
1100 ioaddr->device_addr = ioaddr->cmd_addr + SCC_REG_DEVICE;
1101 ioaddr->status_addr = ioaddr->cmd_addr + SCC_REG_STATUS;
1102 ioaddr->command_addr = ioaddr->cmd_addr + SCC_REG_CMD;
1105 static int scc_host_init(struct ata_probe_ent *probe_ent)
1107 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1110 rc = scc_reset_controller(probe_ent);
1114 probe_ent->n_ports = 1;
1116 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1119 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1123 scc_setup_ports(&probe_ent->port[0], probe_ent->iomap[SCC_BMID_BAR]);
1125 pci_set_master(pdev);
1131 * scc_init_one - Register SCC PATA device with kernel services
1132 * @pdev: PCI device to register
1133 * @ent: Entry in scc_pci_tbl matching with @pdev
1136 * Inherited from PCI layer (may sleep).
1139 * Zero on success, or -ERRNO value.
1142 static int scc_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1144 static int printed_version;
1145 unsigned int board_idx = (unsigned int) ent->driver_data;
1146 struct device *dev = &pdev->dev;
1147 struct ata_probe_ent *probe_ent;
1150 if (!printed_version++)
1151 dev_printk(KERN_DEBUG, &pdev->dev,
1152 "version " DRV_VERSION "\n");
1154 rc = pcim_enable_device(pdev);
1158 rc = pcim_iomap_regions(pdev, (1 << SCC_CTRL_BAR) | (1 << SCC_BMID_BAR), DRV_NAME);
1160 pcim_pin_device(pdev);
1164 probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
1168 probe_ent->dev = dev;
1169 INIT_LIST_HEAD(&probe_ent->node);
1171 probe_ent->sht = scc_port_info[board_idx].sht;
1172 probe_ent->port_flags = scc_port_info[board_idx].flags;
1173 probe_ent->pio_mask = scc_port_info[board_idx].pio_mask;
1174 probe_ent->udma_mask = scc_port_info[board_idx].udma_mask;
1175 probe_ent->port_ops = scc_port_info[board_idx].port_ops;
1177 probe_ent->irq = pdev->irq;
1178 probe_ent->irq_flags = IRQF_SHARED;
1179 probe_ent->iomap = pcim_iomap_table(pdev);
1181 rc = scc_host_init(probe_ent);
1185 if (!ata_device_add(probe_ent))
1188 devm_kfree(dev, probe_ent);
1192 static struct pci_driver scc_pci_driver = {
1194 .id_table = scc_pci_tbl,
1195 .probe = scc_init_one,
1196 .remove = ata_pci_remove_one,
1198 .suspend = ata_pci_device_suspend,
1199 .resume = ata_pci_device_resume,
1203 static int __init scc_init (void)
1207 DPRINTK("pci_register_driver\n");
1208 rc = pci_register_driver(&scc_pci_driver);
1216 static void __exit scc_exit (void)
1218 pci_unregister_driver(&scc_pci_driver);
1221 module_init(scc_init);
1222 module_exit(scc_exit);
1224 MODULE_AUTHOR("Toshiba corp");
1225 MODULE_DESCRIPTION("SCSI low-level driver for Toshiba SCC PATA controller");
1226 MODULE_LICENSE("GPL");
1227 MODULE_DEVICE_TABLE(pci, scc_pci_tbl);
1228 MODULE_VERSION(DRV_VERSION);