patch-2.3.9 linux/drivers/char/vino.c

• Lines: 276
• Date: Wed Jun 30 11:24:54 1999
• Orig file: v2.3.8/linux/drivers/char/vino.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.8/linux/drivers/char/vino.c linux/drivers/char/vino.c
@@ -0,0 +1,275 @@
+/* $Id: vino.c,v 1.4 1999/02/09 23:59:36 ulfc Exp $
+ * drivers/char/vino.c
+ *
+ * (incomplete) Driver for the Vino Video input system found in SGI Indys.
+ *
+ * Copyright (C) 1999 Ulf Carlsson (ulfc@bun.falkenberg.se)
+ *
+ * This isn't complete yet, please don't expect any video until I've written
+ * some more code.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/videodev.h>
+
+#include <asm/addrspace.h>
+#include <asm/system.h>
+
+#include "vino.h"
+
+struct vino_device {
+	struct video_device vdev;
+
+	unsigned long chan;
+#define VINO_CHAN_A		0
+#define VINO_CHAN_B		1
+
+	unsigned long flags;
+#define VINO_DMA_ACTIVE		(1<<0)
+};
+
+/* We can actually receive TV and IndyCam input at the same time. Believe it or
+ * not..
+ */
+static struct vino_device vino[2];
+
+/* Those registers have to be accessed by either *one* 64 bit write or *one* 64
+ * bit read. We need some asm to fix this. We can't use mips3 as standard
+ * because we just save 32 bits at context switch.
+ */
+
+static __inline__ unsigned long long vino_reg_read(unsigned long addr)
+{
+	unsigned long long ret __attribute__ ((aligned (64)));
+	unsigned long virt_addr = KSEG1ADDR(addr + VINO_BASE);
+	unsigned long flags;
+
+	save_and_cli(flags);
+	__asm__ __volatile__(
+		".set\tmips3\n\t"
+		".set\tnoat\n\t"
+		"ld\t$1,(%0)\n\t"
+		"sd\t$1,(%1)\n\t"
+		".set\tat\n\t"
+		".set\tmips0"
+		:
+		:"r" (virt_addr),
+		 "r" (&ret)
+		:"$1");
+	restore_flags(flags);
+
+	return ret;
+}
+
+static __inline__ void vino_reg_write(unsigned long long value,
+				      unsigned long addr)
+{
+	unsigned long virt_addr = KSEG1ADDR(addr + VINO_BASE);
+	unsigned long flags;
+
+	/* we might lose the upper parts of the registers which are not saved
+	 * if there comes an interrupt in our way, play safe */
+
+	save_and_cli(flags);
+	__asm__ __volatile__(
+		".set\tmips3\n\t"
+		".set\tnoat\n\t"
+		"ld\t$1,(%0)\n\t"
+		"sd\t$1,(%1)\n\t"
+		".set\tat\n\t"
+		".set\tmips0"
+		:
+		:"r" (&value),
+		 "r" (virt_addr)
+		:"$1");
+	restore_flags(flags);
+}
+
+static __inline__ void vino_reg_and(unsigned long long value,
+				    unsigned long addr)
+{
+	unsigned long virt_addr = KSEG1ADDR(addr + VINO_BASE);
+	unsigned long flags;
+
+	save_and_cli(flags);
+	__asm__ __volatile__(
+		".set\tmips3\n\t"
+		".set\tnoat\n\t"
+		"ld\t$1,(%0)\n\t"
+		"ld\t$2,(%1)\n\t"
+		"and\t$1,$1,$2\n\t"
+		"sd\t$1,(%0)\n\t"
+		".set\tat\n\t"
+		".set\tmips0"
+		:
+		:"r" (virt_addr),
+		 "r" (&value)
+		:"$1","$2");
+	restore_flags(flags);
+}
+
+static __inline__ void vino_reg_or(unsigned long long value,
+				   unsigned long addr)
+{
+	unsigned long virt_addr = KSEG1ADDR(addr + VINO_BASE);
+	unsigned long flags;
+
+	save_and_cli(flags);
+	__asm__ __volatile__(
+		".set\tmips3\n\t"
+		".set\tnoat\n\t"
+		"ld\t$1,(%0)\n\t"
+		"ld\t$2,(%1)\n\t"
+		"or\t$1,$1,$2\n\t"
+		"sd\t$1,(%0)\n\t"
+		".set\tat\n\t"
+		".set\tmips0"
+		:
+		:"r" (virt_addr),
+		 "r" (&value)
+		:"$1","$2");
+	restore_flags(flags);
+}
+
+static int vino_dma_setup(void)
+{
+	return 0;
+}
+
+static void vino_dma_stop(void)
+{
+
+}
+
+static int vino_init(void)
+{
+	unsigned long ret;
+	unsigned short rev, id;
+	unsigned long long foo;
+	unsigned long *bar;
+
+	bar = (unsigned long *) &foo;
+
+	ret = vino_reg_read(VINO_REVID);
+
+	rev = (ret & VINO_REVID_REV_MASK);
+	id = (ret & VINO_REVID_ID_MASK) >> 4;
+
+	printk("Vino: ID:%02hx Rev:%02hx\n", id, rev);
+
+	foo = vino_reg_read(VINO_A_DESC_DATA0);
+	printk("0x%lx", bar[0]);
+	printk("%lx ", bar[1]);
+	foo = vino_reg_read(VINO_A_DESC_DATA1);
+	printk("0x%lx", bar[0]);
+	printk("%lx ", bar[1]);
+	foo = vino_reg_read(VINO_A_DESC_DATA2);
+	printk("0x%lx", bar[0]);
+	printk("%lx ", bar[1]);
+	foo = vino_reg_read(VINO_A_DESC_DATA3);
+	printk("0x%lx", bar[0]);
+	printk("%lx\n", bar[1]);
+	foo = vino_reg_read(VINO_B_DESC_DATA0);
+	printk("0x%lx", bar[0]);
+	printk("%lx ", bar[1]);
+	foo = vino_reg_read(VINO_B_DESC_DATA1);
+	printk("0x%lx", bar[0]);
+	printk("%lx ", bar[1]);
+	foo = vino_reg_read(VINO_B_DESC_DATA2);
+	printk("0x%lx", bar[0]);
+	printk("%lx ", bar[1]);
+	foo = vino_reg_read(VINO_B_DESC_DATA3);
+	printk("0x%lx", bar[0]);
+	printk("%lx\n", bar[1]);
+
+	return 0;
+}
+
+static void vino_dma_go(struct vino_device *v)
+{
+	
+}
+
+/* Reset the vino back to default state */
+
+static void vino_setup(struct vino_device *v)
+{
+	
+}
+
+static int vino_open(struct video_device *dev, int flags)
+{
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static void vino_close(struct video_device *dev)
+{
+	MOD_DEC_USE_COUNT;
+}
+
+static int vino_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
+{
+	return 0;
+}
+
+static int vino_mmap(struct video_device *dev, const char *adr,
+		     unsigned long size)
+{
+	return 0;
+}
+
+static struct video_device vino_dev = {
+	"Vino IndyCam/TV",
+	VID_TYPE_CAPTURE,
+	VID_HARDWARE_VINO,
+	vino_open,
+	vino_close,
+	NULL,		/* vino_read */
+	NULL,		/* vino_write */
+	NULL,		/* vino_poll */
+	vino_ioctl,
+	vino_mmap,
+	NULL,		/* vino_init */
+	NULL,
+	0,
+	0
+};
+
+__initfunc(int init_vino(struct video_device *dev))
+{
+	int err;
+
+	err = vino_init();
+	if (err)
+		return err;
+
+#if 0
+	if (video_register_device(&vinodev, VFL_TYPE_GRABBER) == -1) {
+		return -ENODEV;
+	}
+#endif
+
+	return 0;
+}
+
+#ifdef MODULE
+int init_module(void)
+{
+	int err;
+
+	err = vino_init();
+	if (err)
+		return err;
+
+	return 0;
+}
+
+void cleanup_module(void)
+{
+}
+#endif