2 * (incomplete) Driver for the VINO (Video In No Out) system found in SGI Indys.
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License version 2 as published by the Free Software Foundation.
7 * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/types.h>
14 #include <linux/slab.h>
15 #include <linux/wrapper.h>
16 #include <linux/errno.h>
17 #include <linux/irq.h>
18 #include <linux/delay.h>
19 #include <linux/videodev.h>
20 #include <linux/i2c.h>
21 #include <linux/i2c-algo-sgi.h>
23 #include <asm/addrspace.h>
24 #include <asm/system.h>
25 #include <asm/bootinfo.h>
26 #include <asm/pgtable.h>
27 #include <asm/paccess.h>
29 #include <asm/sgi/ip22.h>
30 #include <asm/sgi/hpc3.h>
31 #include <asm/sgi/mc.h>
37 #define DEBUG(x...) printk(x);
43 /* VINO ASIC registers */
44 struct sgi_vino *vino;
46 static const char *vinostr = "VINO IndyCam/TV";
47 static int threshold_a = 512;
48 static int threshold_b = 512;
51 struct video_device vdev;
58 struct i2c_client *driver;
63 struct vino_device chA;
64 struct vino_device chB;
66 struct vino_client decoder;
67 struct vino_client camera;
69 struct semaphore input_lock;
71 /* Loaded into VINO descriptors to clear End Of Descriptors table
72 * interupt condition */
73 unsigned long dummy_page;
74 unsigned int dummy_buf[4] __attribute__((aligned(8)));
77 static struct vino_video *Vino;
79 unsigned i2c_vino_getctrl(void *data)
81 return vino->i2c_control;
84 void i2c_vino_setctrl(void *data, unsigned val)
86 vino->i2c_control = val;
89 unsigned i2c_vino_rdata(void *data)
91 return vino->i2c_data;
94 void i2c_vino_wdata(void *data, unsigned val)
99 static struct i2c_algo_sgi_data i2c_sgi_vino_data =
101 .getctrl = &i2c_vino_getctrl,
102 .setctrl = &i2c_vino_setctrl,
103 .rdata = &i2c_vino_rdata,
104 .wdata = &i2c_vino_wdata,
110 * There are two possible clients on VINO I2C bus, so we limit usage only
113 static int i2c_vino_client_reg(struct i2c_client *client)
117 down(&Vino->input_lock);
118 switch (client->driver->id) {
119 case I2C_DRIVERID_SAA7191:
120 if (Vino->decoder.driver)
123 Vino->decoder.driver = client;
125 case I2C_DRIVERID_INDYCAM:
126 if (Vino->camera.driver)
129 Vino->camera.driver = client;
134 up(&Vino->input_lock);
139 static int i2c_vino_client_unreg(struct i2c_client *client)
143 down(&Vino->input_lock);
144 if (client == Vino->decoder.driver) {
145 if (Vino->decoder.owner)
148 Vino->decoder.driver = NULL;
149 } else if (client == Vino->camera.driver) {
150 if (Vino->camera.owner)
153 Vino->camera.driver = NULL;
155 up(&Vino->input_lock);
160 static struct i2c_adapter vino_i2c_adapter =
162 .name = "VINO I2C bus",
163 .id = I2C_HW_SGI_VINO,
164 .algo_data = &i2c_sgi_vino_data,
165 .client_register = &i2c_vino_client_reg,
166 .client_unregister = &i2c_vino_client_unreg,
169 static int vino_i2c_add_bus(void)
171 return i2c_sgi_add_bus(&vino_i2c_adapter);
174 static int vino_i2c_del_bus(void)
176 return i2c_sgi_del_bus(&vino_i2c_adapter);
180 static void vino_interrupt(int irq, void *dev_id, struct pt_regs *regs)
184 static int vino_open(struct video_device *dev, int flags)
186 struct vino_device *videv = (struct vino_device *)dev;
191 static void vino_close(struct video_device *dev)
193 struct vino_device *videv = (struct vino_device *)dev;
196 static int vino_mmap(struct video_device *dev, const char *adr,
199 struct vino_device *videv = (struct vino_device *)dev;
204 static int vino_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
206 struct vino_device *videv = (struct vino_device *)dev;
211 static const struct video_device vino_device = {
212 .owner = THIS_MODULE,
213 .type = VID_TYPE_CAPTURE | VID_TYPE_SUBCAPTURE,
214 .hardware = VID_HARDWARE_VINO,
222 static int __init vino_init(void)
227 /* VINO is Indy specific beast */
228 if (ip22_is_fullhouse())
232 * VINO is in the EISA address space, so the sysid register will tell
233 * us if the EISA_PRESENT pin on MC has been pulled low.
235 * If EISA_PRESENT is not set we definitely don't have a VINO equiped
238 if (!(sgimc->systemid & SGIMC_SYSID_EPRESENT)) {
239 printk(KERN_ERR "VINO not found\n");
243 vino = (struct sgi_vino *)ioremap(VINO_BASE, sizeof(struct sgi_vino));
247 /* Okay, once we know that VINO is present we'll read its revision
248 * safe way. One never knows... */
249 if (get_dbe(rev, &(vino->rev_id))) {
250 printk(KERN_ERR "VINO: failed to read revision register\n");
254 if (VINO_ID_VALUE(rev) != VINO_CHIP_ID) {
255 printk(KERN_ERR "VINO is not VINO (Rev/ID: 0x%04lx)\n", rev);
259 printk(KERN_INFO "VINO Rev: 0x%02lx\n", VINO_REV_NUM(rev));
261 Vino = (struct vino_video *)
262 kmalloc(sizeof(struct vino_video), GFP_KERNEL);
268 Vino->dummy_page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
269 if (!Vino->dummy_page) {
273 for (i = 0; i < 4; i++)
274 Vino->dummy_buf[i] = PHYSADDR(Vino->dummy_page);
277 /* prevent VINO from throwing spurious interrupts */
278 vino->a.next_4_desc = PHYSADDR(Vino->dummy_buf);
279 vino->b.next_4_desc = PHYSADDR(Vino->dummy_buf);
281 vino->intr_status = 0;
282 /* set threshold level */
283 vino->a.fifo_thres = threshold_a;
284 vino->b.fifo_thres = threshold_b;
286 init_MUTEX(&Vino->input_lock);
288 if (request_irq(SGI_VINO_IRQ, vino_interrupt, 0, vinostr, NULL)) {
289 printk(KERN_ERR "VINO: irq%02d registration failed\n",
295 ret = vino_i2c_add_bus();
297 printk(KERN_ERR "VINO: I2C bus registration failed\n");
301 if (video_register_device(&Vino->chA.vdev, VFL_TYPE_GRABBER, -1) < 0) {
302 printk("%s, chnl %d: device registration failed.\n",
303 Vino->chA.vdev.name, Vino->chA.chan);
305 goto out_i2c_del_bus;
307 if (video_register_device(&Vino->chB.vdev, VFL_TYPE_GRABBER, -1) < 0) {
308 printk("%s, chnl %d: device registration failed.\n",
309 Vino->chB.vdev.name, Vino->chB.chan);
311 goto out_unregister_vdev;
317 video_unregister_device(&Vino->chA.vdev);
321 free_irq(SGI_VINO_IRQ, NULL);
323 free_page(Vino->dummy_page);
332 static void __exit vino_exit(void)
334 video_unregister_device(&Vino->chA.vdev);
335 video_unregister_device(&Vino->chB.vdev);
337 free_irq(SGI_VINO_IRQ, NULL);
338 free_page(Vino->dummy_page);
343 module_init(vino_init);
344 module_exit(vino_exit);
346 MODULE_DESCRIPTION("Video4Linux driver for SGI Indy VINO (IndyCam)");
347 MODULE_LICENSE("GPL");