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Diffstat (limited to 'linux/drivers/media/video/ir-kbd-i2c.c')
-rw-r--r--linux/drivers/media/video/ir-kbd-i2c.c373
1 files changed, 373 insertions, 0 deletions
diff --git a/linux/drivers/media/video/ir-kbd-i2c.c b/linux/drivers/media/video/ir-kbd-i2c.c
new file mode 100644
index 000000000..6d40f3a96
--- /dev/null
+++ b/linux/drivers/media/video/ir-kbd-i2c.c
@@ -0,0 +1,373 @@
+/*
+ * keyboard input driver for i2c IR remote controls
+ *
+ * Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
+ * modified for PixelView (BT878P+W/FM) by
+ * Michal Kochanowicz <mkochano@pld.org.pl>
+ * Christoph Bartelmus <lirc@bartelmus.de>
+ * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
+ * Ulrich Mueller <ulrich.mueller42@web.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/workqueue.h>
+
+#include <asm/semaphore.h>
+
+#include <media/ir-common.h>
+
+struct IR;
+struct IR {
+ struct i2c_client c;
+ struct input_dev input;
+ struct ir_input_state ir;
+
+ struct work_struct work;
+ struct timer_list timer;
+ char phys[32];
+ int (*get_key)(struct IR*, u32*, u32*);
+};
+
+/* ----------------------------------------------------------------------- */
+/* insmod parameters */
+
+static int debug;
+module_param(debug, int, 0644); /* debug level (0,1,2) */
+
+#define DEVNAME "ir-kbd-i2c"
+#define dprintk(level, fmt, arg...) if (debug >= level) \
+ printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
+
+/* ----------------------------------------------------------------------- */
+
+static inline int reverse(int data, int bits)
+{
+ int i,c;
+
+ for (c=0,i=0; i<bits; i++) {
+ c |= (((data & (1<<i)) ? 1:0)) << (bits-1-i);
+ }
+ return c;
+}
+
+static int get_key_haup(struct IR *ir, u32 *ir_key, u32 *ir_raw)
+{
+ unsigned char buf[3];
+ int start, toggle, dev, code;
+
+ /* poll IR chip */
+ if (3 != i2c_master_recv(&ir->c,buf,3))
+ return -EIO;
+
+ /* split rc5 data block ... */
+ start = (buf[0] >> 6) & 3;
+ toggle = (buf[0] >> 5) & 1;
+ dev = buf[0] & 0x1f;
+ code = (buf[1] >> 2) & 0x3f;
+
+ if (3 != start)
+ /* no key pressed */
+ return 0;
+ dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n",
+ start, toggle, dev, code);
+
+ /* return key */
+ *ir_key = code;
+ *ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code;
+ return 1;
+}
+
+static int get_key_pixelview(struct IR *ir, u32 *ir_key, u32 *ir_raw)
+{
+ unsigned char b;
+
+ /* poll IR chip */
+ if (1 != i2c_master_recv(&ir->c,&b,1)) {
+ dprintk(1,"read error\n");
+ return -EIO;
+ }
+ *ir_key = b;
+ *ir_raw = b;
+ return 1;
+}
+
+static int get_key_pv951(struct IR *ir, u32 *ir_key, u32 *ir_raw)
+{
+ unsigned char b;
+
+ /* poll IR chip */
+ if (1 != i2c_master_recv(&ir->c,&b,1)) {
+ dprintk(1,"read error\n");
+ return -EIO;
+ }
+
+ /* ignore 0xaa */
+ if (b==0xaa)
+ return 0;
+ dprintk(2,"key %02x\n", b);
+
+ *ir_key = b;
+ *ir_raw = b;
+ return 1;
+}
+
+static int get_key_knc1(struct IR *ir, u32 *ir_key, u32 *ir_raw)
+{
+ unsigned char b;
+
+ /* poll IR chip */
+ if (1 != i2c_master_recv(&ir->c,&b,1)) {
+ dprintk(1,"read error\n");
+ return -EIO;
+ }
+
+ /* it seems that 0xFE indicates that a button is still hold
+ down, while 0xFF indicates that no button is hold
+ down. 0xFE sequences are sometimes interrupted by 0xFF */
+
+ dprintk(2,"key %02x\n", b);
+
+ if (b == 0xFF)
+ return 0;
+
+ if (b == 0xFE)
+ /* keep old data */
+ return 1;
+
+ *ir_key = b;
+ *ir_raw = b;
+ return 1;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static void ir_key_poll(struct IR *ir)
+{
+ u32 ir_key, ir_raw;
+ int rc;
+
+ dprintk(2,"ir_poll_key\n");
+ rc = ir->get_key(ir, &ir_key, &ir_raw);
+ if (rc < 0) {
+ dprintk(2,"error\n");
+ return;
+ }
+
+ if (0 == rc) {
+ ir_input_nokey(&ir->input,&ir->ir);
+ } else {
+ ir_input_keydown(&ir->input,&ir->ir, ir_key, ir_raw);
+ }
+}
+
+static void ir_timer(unsigned long data)
+{
+ struct IR *ir = (struct IR*)data;
+ schedule_work(&ir->work);
+}
+
+static void ir_work(void *data)
+{
+ struct IR *ir = data;
+ ir_key_poll(ir);
+ mod_timer(&ir->timer, jiffies+HZ/10);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int ir_attach(struct i2c_adapter *adap, int addr,
+ unsigned short flags, int kind);
+static int ir_detach(struct i2c_client *client);
+static int ir_probe(struct i2c_adapter *adap);
+
+static struct i2c_driver driver = {
+ .name = "ir remote kbd driver",
+ .id = I2C_DRIVERID_EXP3, /* FIXME */
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = ir_probe,
+ .detach_client = ir_detach,
+};
+
+static struct i2c_client client_template =
+{
+ I2C_DEVNAME("unset"),
+ .driver = &driver
+};
+
+static int ir_attach(struct i2c_adapter *adap, int addr,
+ unsigned short flags, int kind)
+{
+ IR_KEYTAB_TYPE *ir_codes = NULL;
+ char *name;
+ int ir_type;
+ struct IR *ir;
+
+ if (NULL == (ir = kmalloc(sizeof(struct IR),GFP_KERNEL)))
+ return -ENOMEM;
+ memset(ir,0,sizeof(*ir));
+ ir->c = client_template;
+
+ i2c_set_clientdata(&ir->c, ir);
+ ir->c.adapter = adap;
+ ir->c.addr = addr;
+
+ switch(addr) {
+ case 0x64:
+ name = "Pixelview";
+ ir->get_key = get_key_pixelview;
+ ir_type = IR_TYPE_OTHER;
+ ir_codes = ir_codes_empty;
+ break;
+ case 0x4b:
+ name = "PV951";
+ ir->get_key = get_key_pv951;
+ ir_type = IR_TYPE_OTHER;
+ ir_codes = ir_codes_empty;
+ break;
+ case 0x18:
+ case 0x1a:
+ name = "Hauppauge";
+ ir->get_key = get_key_haup;
+ ir_type = IR_TYPE_RC5;
+ ir_codes = ir_codes_rc5_tv;
+ break;
+ case 0x30:
+ name = "KNC One";
+ ir->get_key = get_key_knc1;
+ ir_type = IR_TYPE_OTHER;
+ ir_codes = ir_codes_empty;
+ break;
+ default:
+ /* shouldn't happen */
+ printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr);
+ kfree(ir);
+ return -1;
+ }
+
+ /* register i2c device */
+ i2c_attach_client(&ir->c);
+ snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
+ snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
+ ir->c.adapter->dev.bus_id,
+ ir->c.dev.bus_id);
+
+ /* init + register input device */
+ ir_input_init(&ir->input,&ir->ir,ir_type,ir_codes);
+ ir->input.id.bustype = BUS_I2C;
+ ir->input.name = ir->c.name;
+ ir->input.phys = ir->phys;
+ input_register_device(&ir->input);
+ printk(DEVNAME ": %s detected at %s\n",ir->input.name,ir->input.phys);
+
+ /* start polling via eventd */
+ INIT_WORK(&ir->work, ir_work, ir);
+ init_timer(&ir->timer);
+ ir->timer.function = ir_timer;
+ ir->timer.data = (unsigned long)ir;
+ schedule_work(&ir->work);
+
+ return 0;
+}
+
+static int ir_detach(struct i2c_client *client)
+{
+ struct IR *ir = i2c_get_clientdata(client);
+
+ /* kill outstanding polls */
+ del_timer(&ir->timer);
+ flush_scheduled_work();
+
+ /* unregister devices */
+ input_unregister_device(&ir->input);
+ i2c_detach_client(&ir->c);
+
+ /* free memory */
+ kfree(ir);
+ return 0;
+}
+
+static int ir_probe(struct i2c_adapter *adap)
+{
+
+ /* The external IR receiver is at i2c address 0x34 (0x35 for
+ reads). Future Hauppauge cards will have an internal
+ receiver at 0x30 (0x31 for reads). In theory, both can be
+ fitted, and Hauppauge suggest an external overrides an
+ internal.
+
+ That's why we probe 0x1a (~0x34) first. CB
+ */
+
+ static const int probe[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
+ struct i2c_client c; char buf; int i,rc;
+
+ if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848)) {
+ memset(&c,0,sizeof(c));
+ c.adapter = adap;
+ for (i = 0; -1 != probe[i]; i++) {
+ c.addr = probe[i];
+ rc = i2c_master_recv(&c,&buf,1);
+ dprintk(1,"probe 0x%02x @ %s: %s\n",
+ probe[i], adap->name,
+ (1 == rc) ? "yes" : "no");
+ if (1 == rc) {
+ ir_attach(adap,probe[i],0,0);
+ break;
+ }
+ }
+ }
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
+MODULE_DESCRIPTION("input driver for i2c IR remote controls");
+MODULE_LICENSE("GPL");
+
+static int ir_init(void)
+{
+ i2c_add_driver(&driver);
+ return 0;
+}
+
+static void ir_fini(void)
+{
+ i2c_del_driver(&driver);
+}
+
+module_init(ir_init);
+module_exit(ir_fini);
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
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