2
* Copyright (C) 1997-1998 Mark Lord <mlord@pobox.com>
3
* Copyright (C) 1998 Eddie C. Dost <ecd@skynet.be>
4
* Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
5
* Copyright (C) 2004 Grant Grundler <grundler at parisc-linux.org>
7
* Inspired by an earlier effort from David S. Miller <davem@redhat.com>
10
#include <linux/module.h>
11
#include <linux/types.h>
12
#include <linux/kernel.h>
13
#include <linux/interrupt.h>
14
#include <linux/pci.h>
15
#include <linux/delay.h>
16
#include <linux/ide.h>
17
#include <linux/init.h>
21
#define DRV_NAME "ns87415"
24
/* SUPERIO 87560 is a PoS chip that NatSem denies exists.
25
* Unfortunately, it's built-in on all Astro-based PA-RISC workstations
26
* which use the integrated NS87514 cell for CD-ROM support.
27
* i.e we have to support for CD-ROM installs.
28
* See drivers/parisc/superio.c for more gory details.
30
#include <asm/superio.h>
32
#define SUPERIO_IDE_MAX_RETRIES 25
34
/* Because of a defect in Super I/O, all reads of the PCI DMA status
35
* registers, IDE status register and the IDE select register need to be
38
static u8 superio_ide_inb (unsigned long port)
41
int retries = SUPERIO_IDE_MAX_RETRIES;
43
/* printk(" [ reading port 0x%x with retry ] ", port); */
49
} while (tmp == 0 && retries-- > 0);
54
static u8 superio_read_status(ide_hwif_t *hwif)
56
return superio_ide_inb(hwif->io_ports.status_addr);
59
static u8 superio_dma_sff_read_status(ide_hwif_t *hwif)
61
return superio_ide_inb(hwif->dma_base + ATA_DMA_STATUS);
64
static void superio_tf_read(ide_drive_t *drive, struct ide_taskfile *tf,
67
struct ide_io_ports *io_ports = &drive->hwif->io_ports;
69
if (valid & IDE_VALID_ERROR)
70
tf->error = inb(io_ports->feature_addr);
71
if (valid & IDE_VALID_NSECT)
72
tf->nsect = inb(io_ports->nsect_addr);
73
if (valid & IDE_VALID_LBAL)
74
tf->lbal = inb(io_ports->lbal_addr);
75
if (valid & IDE_VALID_LBAM)
76
tf->lbam = inb(io_ports->lbam_addr);
77
if (valid & IDE_VALID_LBAH)
78
tf->lbah = inb(io_ports->lbah_addr);
79
if (valid & IDE_VALID_DEVICE)
80
tf->device = superio_ide_inb(io_ports->device_addr);
83
static void ns87415_dev_select(ide_drive_t *drive);
85
static const struct ide_tp_ops superio_tp_ops = {
86
.exec_command = ide_exec_command,
87
.read_status = superio_read_status,
88
.read_altstatus = ide_read_altstatus,
89
.write_devctl = ide_write_devctl,
91
.dev_select = ns87415_dev_select,
92
.tf_load = ide_tf_load,
93
.tf_read = superio_tf_read,
95
.input_data = ide_input_data,
96
.output_data = ide_output_data,
99
static void __devinit superio_init_iops(struct hwif_s *hwif)
101
struct pci_dev *pdev = to_pci_dev(hwif->dev);
103
u8 port = hwif->channel, tmp;
105
dma_stat = (pci_resource_start(pdev, 4) & ~3) + (!port ? 2 : 0xa);
107
/* Clear error/interrupt, enable dma */
108
tmp = superio_ide_inb(dma_stat);
109
outb(tmp | 0x66, dma_stat);
112
#define superio_dma_sff_read_status ide_dma_sff_read_status
115
static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };
118
* This routine either enables/disables (according to IDE_DFLAG_PRESENT)
119
* the IRQ associated with the port,
120
* and selects either PIO or DMA handshaking for the next I/O operation.
122
static void ns87415_prepare_drive (ide_drive_t *drive, unsigned int use_dma)
124
ide_hwif_t *hwif = drive->hwif;
125
struct pci_dev *dev = to_pci_dev(hwif->dev);
126
unsigned int bit, other, new, *old = (unsigned int *) hwif->select_data;
129
local_irq_save(flags);
132
/* Adjust IRQ enable bit */
133
bit = 1 << (8 + hwif->channel);
135
if (drive->dev_flags & IDE_DFLAG_PRESENT)
140
/* Select PIO or DMA, DMA may only be selected for one drive/channel. */
141
bit = 1 << (20 + (drive->dn & 1) + (hwif->channel << 1));
142
other = 1 << (20 + (1 - (drive->dn & 1)) + (hwif->channel << 1));
143
new = use_dma ? ((new & ~other) | bit) : (new & ~bit);
149
* Don't change DMA engine settings while Write Buffers
152
(void) pci_read_config_byte(dev, 0x43, &stat);
153
while (stat & 0x03) {
155
(void) pci_read_config_byte(dev, 0x43, &stat);
159
(void) pci_write_config_dword(dev, 0x40, new);
162
* And let things settle...
167
local_irq_restore(flags);
170
static void ns87415_dev_select(ide_drive_t *drive)
172
ns87415_prepare_drive(drive,
173
!!(drive->dev_flags & IDE_DFLAG_USING_DMA));
175
outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
178
static void ns87415_dma_start(ide_drive_t *drive)
180
ns87415_prepare_drive(drive, 1);
181
ide_dma_start(drive);
184
static int ns87415_dma_end(ide_drive_t *drive)
186
ide_hwif_t *hwif = drive->hwif;
187
u8 dma_stat = 0, dma_cmd = 0;
189
dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
190
/* get DMA command mode */
191
dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
193
outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
194
/* from ERRATA: clear the INTR & ERROR bits */
195
dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
196
outb(dma_cmd | 6, hwif->dma_base + ATA_DMA_CMD);
198
ns87415_prepare_drive(drive, 0);
200
/* verify good DMA status */
201
return (dma_stat & 7) != 4;
204
static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
206
struct pci_dev *dev = to_pci_dev(hwif->dev);
207
unsigned int ctrl, using_inta;
215
* We cannot probe for IRQ: both ports share common IRQ on INTA.
216
* Also, leave IRQ masked during drive probing, to prevent infinite
217
* interrupts from a potentially floating INTA..
219
* IRQs get unmasked in dev_select() when drive is first used.
221
(void) pci_read_config_dword(dev, 0x40, &ctrl);
222
(void) pci_read_config_byte(dev, 0x09, &progif);
223
/* is irq in "native" mode? */
224
using_inta = progif & (1 << (hwif->channel << 1));
226
using_inta = ctrl & (1 << (4 + hwif->channel));
228
hwif->select_data = hwif->mate->select_data;
230
hwif->select_data = (unsigned long)
231
&ns87415_control[ns87415_count++];
232
ctrl |= (1 << 8) | (1 << 9); /* mask both IRQs */
234
ctrl &= ~(1 << 6); /* unmask INTA */
235
*((unsigned int *)hwif->select_data) = ctrl;
236
(void) pci_write_config_dword(dev, 0x40, ctrl);
239
* Set prefetch size to 512 bytes for both ports,
240
* but don't turn on/off prefetching here.
242
pci_write_config_byte(dev, 0x55, 0xee);
246
* XXX: Reset the device, if we don't it will not respond to
247
* dev_select() properly during first ide_probe_port().
250
outb(12, hwif->io_ports.ctl_addr);
252
outb(8, hwif->io_ports.ctl_addr);
255
stat = hwif->tp_ops->read_status(hwif);
258
} while ((stat & ATA_BUSY) && --timeout);
263
hwif->irq = pci_get_legacy_ide_irq(dev, hwif->channel);
268
outb(0x60, hwif->dma_base + ATA_DMA_STATUS);
271
static const struct ide_tp_ops ns87415_tp_ops = {
272
.exec_command = ide_exec_command,
273
.read_status = ide_read_status,
274
.read_altstatus = ide_read_altstatus,
275
.write_devctl = ide_write_devctl,
277
.dev_select = ns87415_dev_select,
278
.tf_load = ide_tf_load,
279
.tf_read = ide_tf_read,
281
.input_data = ide_input_data,
282
.output_data = ide_output_data,
285
static const struct ide_dma_ops ns87415_dma_ops = {
286
.dma_host_set = ide_dma_host_set,
287
.dma_setup = ide_dma_setup,
288
.dma_start = ns87415_dma_start,
289
.dma_end = ns87415_dma_end,
290
.dma_test_irq = ide_dma_test_irq,
291
.dma_lost_irq = ide_dma_lost_irq,
292
.dma_timer_expiry = ide_dma_sff_timer_expiry,
293
.dma_sff_read_status = superio_dma_sff_read_status,
296
static const struct ide_port_info ns87415_chipset __devinitdata = {
298
.init_hwif = init_hwif_ns87415,
299
.tp_ops = &ns87415_tp_ops,
300
.dma_ops = &ns87415_dma_ops,
301
.host_flags = IDE_HFLAG_TRUST_BIOS_FOR_DMA |
302
IDE_HFLAG_NO_ATAPI_DMA,
305
static int __devinit ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id)
307
struct ide_port_info d = ns87415_chipset;
309
#ifdef CONFIG_SUPERIO
310
if (PCI_SLOT(dev->devfn) == 0xE) {
311
/* Built-in - assume it's under superio. */
312
d.init_iops = superio_init_iops;
313
d.tp_ops = &superio_tp_ops;
316
return ide_pci_init_one(dev, &d, NULL);
319
static const struct pci_device_id ns87415_pci_tbl[] = {
320
{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87415), 0 },
323
MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl);
325
static struct pci_driver ns87415_pci_driver = {
326
.name = "NS87415_IDE",
327
.id_table = ns87415_pci_tbl,
328
.probe = ns87415_init_one,
329
.remove = ide_pci_remove,
330
.suspend = ide_pci_suspend,
331
.resume = ide_pci_resume,
334
static int __init ns87415_ide_init(void)
336
return ide_pci_register_driver(&ns87415_pci_driver);
339
static void __exit ns87415_ide_exit(void)
341
pci_unregister_driver(&ns87415_pci_driver);
344
module_init(ns87415_ide_init);
345
module_exit(ns87415_ide_exit);
347
MODULE_AUTHOR("Mark Lord, Eddie Dost, Andre Hedrick");
348
MODULE_DESCRIPTION("PCI driver module for NS87415 IDE");
349
MODULE_LICENSE("GPL");