initial_commit

1 files changed, 183 insertions, 0 deletions

diff --git a/drivers/ide/umc8672.c b/drivers/ide/umc8672.c
new file mode 100644
index 00000000..47adcd09
--- /dev/null
+++ b/drivers/ide/umc8672.c
@@ -0,0 +1,183 @@
+/*
+ *  Copyright (C) 1995-1996  Linus Torvalds & author (see below)
+ */
+
+/*
+ *  Principal Author/Maintainer:  PODIEN@hml2.atlas.de (Wolfram Podien)
+ *
+ *  This file provides support for the advanced features
+ *  of the UMC 8672 IDE interface.
+ *
+ *  Version 0.01	Initial version, hacked out of ide.c,
+ *			and #include'd rather than compiled separately.
+ *			This will get cleaned up in a subsequent release.
+ *
+ *  Version 0.02	now configs/compiles separate from ide.c  -ml
+ *  Version 0.03	enhanced auto-tune, fix display bug
+ *  Version 0.05	replace sti() with restore_flags()  -ml
+ *			add detection of possible race condition  -ml
+ */
+
+/*
+ * VLB Controller Support from
+ * Wolfram Podien
+ * Rohoefe 3
+ * D28832 Achim
+ * Germany
+ *
+ * To enable UMC8672 support there must a lilo line like
+ * append="ide0=umc8672"...
+ * To set the speed according to the abilities of the hardware there must be a
+ * line like
+ * #define UMC_DRIVE0 11
+ * in the beginning of the driver, which sets the speed of drive 0 to 11 (there
+ * are some lines present). 0 - 11 are allowed speed values. These values are
+ * the results from the DOS speed test program supplied from UMC. 11 is the
+ * highest speed (about PIO mode 3)
+ */
+#define REALLY_SLOW_IO		/* some systems can safely undef this */
+
+#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 "umc8672"
+
+/*
+ * Default speeds.  These can be changed with "auto-tune" and/or hdparm.
+ */
+#define UMC_DRIVE0      1              /* DOS measured drive speeds */
+#define UMC_DRIVE1      1              /* 0 to 11 allowed */
+#define UMC_DRIVE2      1              /* 11 = Fastest Speed */
+#define UMC_DRIVE3      1              /* In case of crash reduce speed */
+
+static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3};
+static const u8 pio_to_umc [5] = {0, 3, 7, 10, 11};	/* rough guesses */
+
+/*       0    1    2    3    4    5    6    7    8    9    10   11      */
+static const u8 speedtab [3][12] = {
+	{0x0f, 0x0b, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1},
+	{0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1},
+	{0xff, 0xcb, 0xc0, 0x58, 0x36, 0x33, 0x23, 0x22, 0x21, 0x11, 0x10, 0x0}
+};
+
+static void out_umc(char port, char wert)
+{
+	outb_p(port, 0x108);
+	outb_p(wert, 0x109);
+}
+
+static inline u8 in_umc(char port)
+{
+	outb_p(port, 0x108);
+	return inb_p(0x109);
+}
+
+static void umc_set_speeds(u8 speeds[])
+{
+	int i, tmp;
+
+	outb_p(0x5A, 0x108); /* enable umc */
+
+	out_umc(0xd7, (speedtab[0][speeds[2]] | (speedtab[0][speeds[3]]<<4)));
+	out_umc(0xd6, (speedtab[0][speeds[0]] | (speedtab[0][speeds[1]]<<4)));
+	tmp = 0;
+	for (i = 3; i >= 0; i--)
+		tmp = (tmp << 2) | speedtab[1][speeds[i]];
+	out_umc(0xdc, tmp);
+	for (i = 0; i < 4; i++) {
+		out_umc(0xd0 + i, speedtab[2][speeds[i]]);
+		out_umc(0xd8 + i, speedtab[2][speeds[i]]);
+	}
+	outb_p(0xa5, 0x108); /* disable umc */
+
+	printk("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
+		speeds[0], speeds[1], speeds[2], speeds[3]);
+}
+
+static void umc_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	ide_hwif_t *mate = hwif->mate;
+	unsigned long uninitialized_var(flags);
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
+		drive->name, pio, pio_to_umc[pio]);
+	if (mate)
+		spin_lock_irqsave(&mate->lock, flags);
+	if (mate && mate->handler) {
+		printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n");
+	} else {
+		current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio];
+		umc_set_speeds(current_speeds);
+	}
+	if (mate)
+		spin_unlock_irqrestore(&mate->lock, flags);
+}
+
+static const struct ide_port_ops umc8672_port_ops = {
+	.set_pio_mode		= umc_set_pio_mode,
+};
+
+static const struct ide_port_info umc8672_port_info __initdata = {
+	.name			= DRV_NAME,
+	.chipset		= ide_umc8672,
+	.port_ops		= &umc8672_port_ops,
+	.host_flags		= IDE_HFLAG_NO_DMA,
+	.pio_mask		= ATA_PIO4,
+};
+
+static int __init umc8672_probe(void)
+{
+	unsigned long flags;
+
+	if (!request_region(0x108, 2, "umc8672")) {
+		printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n");
+		return 1;
+	}
+	local_irq_save(flags);
+	outb_p(0x5A, 0x108); /* enable umc */
+	if (in_umc (0xd5) != 0xa0) {
+		local_irq_restore(flags);
+		printk(KERN_ERR "umc8672: not found\n");
+		release_region(0x108, 2);
+		return 1;
+	}
+	outb_p(0xa5, 0x108); /* disable umc */
+
+	umc_set_speeds(current_speeds);
+	local_irq_restore(flags);
+
+	return ide_legacy_device_add(&umc8672_port_info, 0);
+}
+
+static int probe_umc8672;
+
+module_param_named(probe, probe_umc8672, bool, 0);
+MODULE_PARM_DESC(probe, "probe for UMC8672 chipset");
+
+static int __init umc8672_init(void)
+{
+	if (probe_umc8672 == 0)
+		goto out;
+
+	if (umc8672_probe() == 0)
+		return 0;
+out:
+	return -ENODEV;
+}
+
+module_init(umc8672_init);
+
+MODULE_AUTHOR("Wolfram Podien");
+MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
+MODULE_LICENSE("GPL");