From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/media/video/vino.c | 347 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 347 insertions(+) create mode 100644 drivers/media/video/vino.c (limited to 'drivers/media/video/vino.c') 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 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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"); -- cgit v1.2.3