1 files changed, 347 insertions, 0 deletions
diff --git a/drivers/media/video/vino.c b/drivers/media/video/vino.c
new file mode 100644
index 00000000000..76e8681d65c
--- /dev/null
+++ b/drivers/media/video/vino.c
@@ -0,0 +1,347 @@
+/*
+ * (incomplete) Driver for the VINO (Video In No Out) system found in SGI Indys.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/wrapper.h>
+#include <linux/errno.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/videodev.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-sgi.h>
+
+#include <asm/addrspace.h>
+#include <asm/system.h>
+#include <asm/bootinfo.h>
+#include <asm/pgtable.h>
+#include <asm/paccess.h>
+#include <asm/io.h>
+#include <asm/sgi/ip22.h>
+#include <asm/sgi/hpc3.h>
+#include <asm/sgi/mc.h>
+
+#include "vino.h"
+
+/* debugging? */
+#if 1
+#define DEBUG(x...)     printk(x);
+#else
+#define DEBUG(x...)
+#endif
+
+
+/* VINO ASIC registers */
+struct sgi_vino *vino;
+
+static const char *vinostr = "VINO IndyCam/TV";
+static int threshold_a = 512;
+static int threshold_b = 512;
+
+struct vino_device {
+	struct video_device vdev;
+#define VINO_CHAN_A		1
+#define VINO_CHAN_B		2
+	int chan;
+};
+
+struct vino_client {
+	struct i2c_client *driver;
+	int owner;
+};
+
+struct vino_video {
+	struct vino_device chA;
+	struct vino_device chB;
+
+	struct vino_client decoder;
+	struct vino_client camera;
+
+	struct semaphore input_lock;
+
+	/* Loaded into VINO descriptors to clear End Of Descriptors table
+	 * interupt condition */
+	unsigned long dummy_page;
+	unsigned int dummy_buf[4] __attribute__((aligned(8)));
+};
+
+static struct vino_video *Vino;
+
+unsigned i2c_vino_getctrl(void *data)
+{
+	return vino->i2c_control;
+}
+
+void i2c_vino_setctrl(void *data, unsigned val)
+{
+	vino->i2c_control = val;
+}
+
+unsigned i2c_vino_rdata(void *data)
+{
+	return vino->i2c_data;
+}
+
+void i2c_vino_wdata(void *data, unsigned val)
+{
+	vino->i2c_data = val;
+}
+
+static struct i2c_algo_sgi_data i2c_sgi_vino_data =
+{
+	.getctrl = &i2c_vino_getctrl,
+	.setctrl = &i2c_vino_setctrl,
+	.rdata   = &i2c_vino_rdata,
+	.wdata   = &i2c_vino_wdata,
+	.xfer_timeout = 200,
+	.ack_timeout  = 1000,
+};
+
+/*
+ * There are two possible clients on VINO I2C bus, so we limit usage only
+ * to them.
+ */
+static int i2c_vino_client_reg(struct i2c_client *client)
+{
+	int res = 0;
+
+	down(&Vino->input_lock);
+	switch (client->driver->id) {
+	case I2C_DRIVERID_SAA7191:
+		if (Vino->decoder.driver)
+			res = -EBUSY;
+		else
+			Vino->decoder.driver = client;
+		break;
+	case I2C_DRIVERID_INDYCAM:
+		if (Vino->camera.driver)
+			res = -EBUSY;
+		else
+			Vino->camera.driver = client;
+		break;
+	default:
+		res = -ENODEV;
+	}
+	up(&Vino->input_lock);
+
+	return res;
+}
+
+static int i2c_vino_client_unreg(struct i2c_client *client)
+{
+	int res = 0;
+
+	down(&Vino->input_lock);
+	if (client == Vino->decoder.driver) {
+		if (Vino->decoder.owner)
+			res = -EBUSY;
+		else
+			Vino->decoder.driver = NULL;
+	} else if (client == Vino->camera.driver) {
+		if (Vino->camera.owner)
+			res = -EBUSY;
+		else
+			Vino->camera.driver = NULL;
+	}
+	up(&Vino->input_lock);
+
+	return res;
+}
+
+static struct i2c_adapter vino_i2c_adapter =
+{
+	.name			= "VINO I2C bus",
+	.id			= I2C_HW_SGI_VINO,
+	.algo_data		= &i2c_sgi_vino_data,
+	.client_register	= &i2c_vino_client_reg,
+	.client_unregister	= &i2c_vino_client_unreg,
+};
+
+static int vino_i2c_add_bus(void)
+{
+	return i2c_sgi_add_bus(&vino_i2c_adapter);
+}
+
+static int vino_i2c_del_bus(void)
+{
+	return i2c_sgi_del_bus(&vino_i2c_adapter);
+}
+
+
+static void vino_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+}
+
+static int vino_open(struct video_device *dev, int flags)
+{
+	struct vino_device *videv = (struct vino_device *)dev;
+
+	return 0;
+}
+
+static void vino_close(struct video_device *dev)
+{
+	struct vino_device *videv = (struct vino_device *)dev;
+}
+
+static int vino_mmap(struct video_device *dev, const char *adr,
+		     unsigned long size)
+{
+	struct vino_device *videv = (struct vino_device *)dev;
+
+	return -EINVAL;
+}
+
+static int vino_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
+{
+	struct vino_device *videv = (struct vino_device *)dev;
+
+	return -EINVAL;
+}
+
+static const struct video_device vino_device = {
+	.owner		= THIS_MODULE,
+	.type		= VID_TYPE_CAPTURE | VID_TYPE_SUBCAPTURE,
+	.hardware	= VID_HARDWARE_VINO,
+	.name		= "VINO",
+	.open		= vino_open,
+	.close		= vino_close,
+	.ioctl		= vino_ioctl,
+	.mmap		= vino_mmap,
+};
+
+static int __init vino_init(void)
+{
+	unsigned long rev;
+	int i, ret = 0;
+
+	/* VINO is Indy specific beast */
+	if (ip22_is_fullhouse())
+		return -ENODEV;
+
+	/*
+	 * VINO is in the EISA address space, so the sysid register will tell
+	 * us if the EISA_PRESENT pin on MC has been pulled low.
+	 *
+	 * If EISA_PRESENT is not set we definitely don't have a VINO equiped
+	 * system.
+	 */
+	if (!(sgimc->systemid & SGIMC_SYSID_EPRESENT)) {
+		printk(KERN_ERR "VINO not found\n");
+		return -ENODEV;
+	}
+
+	vino = (struct sgi_vino *)ioremap(VINO_BASE, sizeof(struct sgi_vino));
+	if (!vino)
+		return -EIO;
+
+	/* Okay, once we know that VINO is present we'll read its revision
+	 * safe way. One never knows... */
+	if (get_dbe(rev, &(vino->rev_id))) {
+		printk(KERN_ERR "VINO: failed to read revision register\n");
+		ret = -ENODEV;
+		goto out_unmap;
+	}
+	if (VINO_ID_VALUE(rev) != VINO_CHIP_ID) {
+		printk(KERN_ERR "VINO is not VINO (Rev/ID: 0x%04lx)\n", rev);
+		ret = -ENODEV;
+		goto out_unmap;
+	}
+	printk(KERN_INFO "VINO Rev: 0x%02lx\n", VINO_REV_NUM(rev));
+
+	Vino = (struct vino_video *)
+		kmalloc(sizeof(struct vino_video), GFP_KERNEL);
+	if (!Vino) {
+		ret = -ENOMEM;
+		goto out_unmap;
+	}
+
+	Vino->dummy_page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
+	if (!Vino->dummy_page) {
+		ret = -ENOMEM;
+		goto out_free_vino;
+	}
+	for (i = 0; i < 4; i++)
+		Vino->dummy_buf[i] = PHYSADDR(Vino->dummy_page);
+
+	vino->control = 0;
+	/* prevent VINO from throwing spurious interrupts */
+	vino->a.next_4_desc = PHYSADDR(Vino->dummy_buf);
+	vino->b.next_4_desc = PHYSADDR(Vino->dummy_buf);
+	udelay(5);
+	vino->intr_status = 0;
+        /* set threshold level */
+        vino->a.fifo_thres = threshold_a;
+	vino->b.fifo_thres = threshold_b;
+
+	init_MUTEX(&Vino->input_lock);
+
+	if (request_irq(SGI_VINO_IRQ, vino_interrupt, 0, vinostr, NULL)) {
+		printk(KERN_ERR "VINO: irq%02d registration failed\n",
+		       SGI_VINO_IRQ);
+		ret = -EAGAIN;
+		goto out_free_page;
+	}
+
+	ret = vino_i2c_add_bus();
+	if (ret) {
+		printk(KERN_ERR "VINO: I2C bus registration failed\n");
+		goto out_free_irq;
+	}
+
+	if (video_register_device(&Vino->chA.vdev, VFL_TYPE_GRABBER, -1) < 0) {
+		printk("%s, chnl %d: device registration failed.\n",
+			Vino->chA.vdev.name, Vino->chA.chan);
+		ret = -EINVAL;
+		goto out_i2c_del_bus;
+	}
+	if (video_register_device(&Vino->chB.vdev, VFL_TYPE_GRABBER, -1) < 0) {
+		printk("%s, chnl %d: device registration failed.\n",
+			Vino->chB.vdev.name, Vino->chB.chan);
+		ret = -EINVAL;
+		goto out_unregister_vdev;
+	}
+
+	return 0;
+
+out_unregister_vdev:
+	video_unregister_device(&Vino->chA.vdev);
+out_i2c_del_bus:
+	vino_i2c_del_bus();
+out_free_irq:
+	free_irq(SGI_VINO_IRQ, NULL);
+out_free_page:
+	free_page(Vino->dummy_page);
+out_free_vino:
+	kfree(Vino);
+out_unmap:
+	iounmap(vino);
+
+	return ret;
+}
+
+static void __exit vino_exit(void)
+{
+	video_unregister_device(&Vino->chA.vdev);
+	video_unregister_device(&Vino->chB.vdev);
+	vino_i2c_del_bus();
+	free_irq(SGI_VINO_IRQ, NULL);
+	free_page(Vino->dummy_page);
+	kfree(Vino);
+	iounmap(vino);
+}
+
+module_init(vino_init);
+module_exit(vino_exit);
+
+MODULE_DESCRIPTION("Video4Linux driver for SGI Indy VINO (IndyCam)");
+MODULE_LICENSE("GPL");