Release 4.14 drivers/ide/dtc2278.c
/*
* Copyright (C) 1996 Linus Torvalds & author (see below)
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <asm/io.h>
#define DRV_NAME "dtc2278"
/*
* Changing this #undef to #define may solve start up problems in some systems.
*/
#undef ALWAYS_SET_DTC2278_PIO_MODE
/*
* From: andy@cercle.cts.com (Dyan Wile)
*
* Below is a patch for DTC-2278 - alike software-programmable controllers
* The code enables the secondary IDE controller and the PIO4 (3?) timings on
* the primary (EIDE). You may probably have to enable the 32-bit support to
* get the full speed. You better get the disk interrupts disabled ( hdparm -u0
* /dev/hd.. ) for the drives connected to the EIDE interface. (I get my
* filesystem corrupted with -u1, but under heavy disk load only :-)
*
* This card is now forced to use the "serialize" feature,
* and irq-unmasking is disallowed. If io_32bit is enabled,
* it must be done for BOTH drives on each interface.
*
* This code was written for the DTC2278E, but might work with any of these:
*
* DTC2278S has only a single IDE interface.
* DTC2278D has two IDE interfaces and is otherwise identical to the S version.
* DTC2278E also has serial ports and a printer port
* DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu>
*
* There may be a fourth controller type. The S and D versions use the
* Winbond chip, and I think the E version does also.
*
*/
static void sub22 (char b, char c)
{
int i;
for(i = 0; i < 3; ++i) {
inb(0x3f6);
outb_p(b,0xb0);
inb(0x3f6);
outb_p(c,0xb4);
inb(0x3f6);
if(inb(0xb4) == c) {
outb_p(7,0xb0);
inb(0x3f6);
return; /* success */
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jens Axboe | 84 | 100.00% | 2 | 100.00% |
| Total | 84 | 100.00% | 2 | 100.00% |
static DEFINE_SPINLOCK(dtc2278_lock);
static void dtc2278_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
unsigned long flags;
if (drive->pio_mode >= XFER_PIO_3) {
spin_lock_irqsave(&dtc2278_lock, flags);
/*
* This enables PIO mode4 (3?) on the first interface
*/
sub22(1,0xc3);
sub22(0,0xa0);
spin_unlock_irqrestore(&dtc2278_lock, flags);
} else {
/* we don't know how to set it back again.. */
/* Actually we do - there is a data sheet available for the
Winbond but does anyone actually care */
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jens Axboe | 52 | 81.25% | 1 | 20.00% |
| Bartlomiej Zolnierkiewicz | 11 | 17.19% | 3 | 60.00% |
| Alan Cox | 1 | 1.56% | 1 | 20.00% |
| Total | 64 | 100.00% | 5 | 100.00% |
static const struct ide_port_ops dtc2278_port_ops = {
.set_pio_mode = dtc2278_set_pio_mode,
};
static const struct ide_port_info dtc2278_port_info __initconst = {
.name = DRV_NAME,
.chipset = ide_dtc2278,
.port_ops = &dtc2278_port_ops,
.host_flags = IDE_HFLAG_SERIALIZE |
IDE_HFLAG_NO_UNMASK_IRQS |
IDE_HFLAG_IO_32BIT |
/* disallow ->io_32bit changes */
IDE_HFLAG_NO_IO_32BIT |
IDE_HFLAG_NO_DMA |
IDE_HFLAG_DTC2278,
.pio_mask = ATA_PIO4,
};
static int __init dtc2278_probe(void)
{
unsigned long flags;
local_irq_save(flags);
/*
* This enables the second interface
*/
outb_p(4,0xb0);
inb(0x3f6);
outb_p(0x20,0xb4);
inb(0x3f6);
#ifdef ALWAYS_SET_DTC2278_PIO_MODE
/*
* This enables PIO mode4 (3?) on the first interface
* and may solve start-up problems for some people.
*/
sub22(1,0xc3);
sub22(0,0xa0);
#endif
local_irq_restore(flags);
return ide_legacy_device_add(&dtc2278_port_info, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jens Axboe | 65 | 84.42% | 2 | 25.00% |
| Bartlomiej Zolnierkiewicz | 12 | 15.58% | 6 | 75.00% |
| Total | 77 | 100.00% | 8 | 100.00% |
static bool probe_dtc2278;
module_param_named(probe, probe_dtc2278, bool, 0);
MODULE_PARM_DESC(probe, "probe for DTC2278xx chipsets");
static int __init dtc2278_init(void)
{
if (probe_dtc2278 == 0)
return -ENODEV;
if (dtc2278_probe()) {
printk(KERN_ERR "dtc2278: ide interfaces already in use!\n");
return -EBUSY;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bartlomiej Zolnierkiewicz | 32 | 82.05% | 3 | 75.00% |
| Jens Axboe | 7 | 17.95% | 1 | 25.00% |
| Total | 39 | 100.00% | 4 | 100.00% |
module_init(dtc2278_init);
MODULE_AUTHOR("See Local File");
MODULE_DESCRIPTION("support of DTC-2278 VLB IDE chipsets");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jens Axboe | 258 | 62.32% | 2 | 9.52% |
| Bartlomiej Zolnierkiewicz | 153 | 36.96% | 16 | 76.19% |
| Andi Kleen | 1 | 0.24% | 1 | 4.76% |
| Alan Cox | 1 | 0.24% | 1 | 4.76% |
| Rusty Russell | 1 | 0.24% | 1 | 4.76% |
| Total | 414 | 100.00% | 21 | 100.00% |
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