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 000000000000..76e8681d65c6
--- /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");