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Diffstat (limited to 'drivers/media/video/ir-kbd-i2c.c')
-rw-r--r--drivers/media/video/ir-kbd-i2c.c555
1 files changed, 555 insertions, 0 deletions
diff --git a/drivers/media/video/ir-kbd-i2c.c b/drivers/media/video/ir-kbd-i2c.c
new file mode 100644
index 0000000..efe8499
--- /dev/null
+++ b/drivers/media/video/ir-kbd-i2c.c
@@ -0,0 +1,555 @@
+/*
+ *
+ * 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>
+ * modified for em2820 based USB TV tuners by
+ * Markus Rechberger <mrechberger@gmail.com>
+ * modified for DViCO Fusion HDTV 5 RT GOLD by
+ * Chaogui Zhang <czhang1974@gmail.com>
+ * modified for MSI TV@nywhere Plus by
+ * Henry Wong <henry@stuffedcow.net>
+ * Mark Schultz <n9xmj@yahoo.com>
+ * Brian Rogers <brian_rogers@comcast.net>
+ *
+ * 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/init.h>
+#include <linux/kernel.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/i2c-id.h>
+#include <linux/workqueue.h>
+
+#include <media/ir-common.h>
+#include <media/ir-kbd-i2c.h>
+
+/* ----------------------------------------------------------------------- */
+/* insmod parameters */
+
+static int debug;
+module_param(debug, int, 0644); /* debug level (0,1,2) */
+
+static int hauppauge;
+module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */
+MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)");
+
+
+#define DEVNAME "ir-kbd-i2c"
+#define dprintk(level, fmt, arg...) if (debug >= level) \
+ printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
+
+/* ----------------------------------------------------------------------- */
+
+static int get_key_haup_common(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
+ int size, int offset)
+{
+ unsigned char buf[6];
+ int start, range, toggle, dev, code, ircode;
+
+ /* poll IR chip */
+ if (size != i2c_master_recv(&ir->c,buf,size))
+ return -EIO;
+
+ /* split rc5 data block ... */
+ start = (buf[offset] >> 7) & 1;
+ range = (buf[offset] >> 6) & 1;
+ toggle = (buf[offset] >> 5) & 1;
+ dev = buf[offset] & 0x1f;
+ code = (buf[offset+1] >> 2) & 0x3f;
+
+ /* rc5 has two start bits
+ * the first bit must be one
+ * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
+ */
+ if (!start)
+ /* no key pressed */
+ return 0;
+ /*
+ * Hauppauge remotes (black/silver) always use
+ * specific device ids. If we do not filter the
+ * device ids then messages destined for devices
+ * such as TVs (id=0) will get through causing
+ * mis-fired events.
+ *
+ * We also filter out invalid key presses which
+ * produce annoying debug log entries.
+ */
+ ircode= (start << 12) | (toggle << 11) | (dev << 6) | code;
+ if ((ircode & 0x1fff)==0x1fff)
+ /* invalid key press */
+ return 0;
+
+ if (dev!=0x1e && dev!=0x1f)
+ /* not a hauppauge remote */
+ return 0;
+
+ if (!range)
+ code += 64;
+
+ dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
+ start, range, toggle, dev, code);
+
+ /* return key */
+ *ir_key = code;
+ *ir_raw = ircode;
+ return 1;
+}
+
+static inline int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
+{
+ return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
+}
+
+static inline int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
+{
+ return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
+}
+
+static int get_key_pixelview(struct IR_i2c *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_i2c *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_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
+{
+ unsigned char buf[4];
+
+ /* poll IR chip */
+ if (4 != i2c_master_recv(&ir->c,buf,4)) {
+ dprintk(1,"read error\n");
+ return -EIO;
+ }
+
+ if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
+ dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
+ buf[0], buf[1], buf[2], buf[3]);
+
+ /* no key pressed or signal from other ir remote */
+ if(buf[0] != 0x1 || buf[1] != 0xfe)
+ return 0;
+
+ *ir_key = buf[2];
+ *ir_raw = (buf[2] << 8) | buf[3];
+
+ return 1;
+}
+
+static int get_key_knc1(struct IR_i2c *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_i2c *ir)
+{
+ static 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_i2c *ir = (struct IR_i2c*)data;
+ schedule_work(&ir->work);
+}
+
+static void ir_work(struct work_struct *work)
+{
+ struct IR_i2c *ir = container_of(work, struct IR_i2c, work);
+ int polling_interval = 100;
+
+ /* MSI TV@nywhere Plus requires more frequent polling
+ otherwise it will miss some keypresses */
+ if (ir->c.adapter->id == I2C_HW_SAA7134 && ir->c.addr == 0x30)
+ polling_interval = 50;
+
+ ir_key_poll(ir);
+ mod_timer(&ir->timer, jiffies + msecs_to_jiffies(polling_interval));
+}
+
+/* ----------------------------------------------------------------------- */
+
+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 = {
+ .driver = {
+ .name = "ir-kbd-i2c",
+ },
+ .id = I2C_DRIVERID_INFRARED,
+ .attach_adapter = ir_probe,
+ .detach_client = ir_detach,
+};
+
+static struct i2c_client client_template =
+{
+ .name = "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_i2c *ir;
+ struct input_dev *input_dev;
+ int err;
+
+ ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!ir || !input_dev) {
+ err = -ENOMEM;
+ goto err_out_free;
+ }
+
+ ir->c = client_template;
+ ir->input = input_dev;
+
+ ir->c.adapter = adap;
+ ir->c.addr = addr;
+
+ i2c_set_clientdata(&ir->c, ir);
+
+ 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_pv951;
+ break;
+ case 0x18:
+ case 0x1a:
+ name = "Hauppauge";
+ ir->get_key = get_key_haup;
+ ir_type = IR_TYPE_RC5;
+ if (hauppauge == 1) {
+ ir_codes = ir_codes_hauppauge_new;
+ } else {
+ 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;
+ case 0x6b:
+ name = "FusionHDTV";
+ ir->get_key = get_key_fusionhdtv;
+ ir_type = IR_TYPE_RC5;
+ ir_codes = ir_codes_fusionhdtv_mce;
+ break;
+ case 0x7a:
+ case 0x47:
+ case 0x71:
+ case 0x2d:
+ if (adap->id == I2C_HW_B_CX2388x) {
+ /* Handled by cx88-input */
+ name = "CX2388x remote";
+ ir_type = IR_TYPE_RC5;
+ ir->get_key = get_key_haup_xvr;
+ if (hauppauge == 1) {
+ ir_codes = ir_codes_hauppauge_new;
+ } else {
+ ir_codes = ir_codes_rc5_tv;
+ }
+ } else {
+ /* Handled by saa7134-input */
+ name = "SAA713x remote";
+ ir_type = IR_TYPE_OTHER;
+ }
+ break;
+ default:
+ /* shouldn't happen */
+ printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n", addr);
+ err = -ENODEV;
+ goto err_out_free;
+ }
+
+ /* Sets name */
+ snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
+ ir->ir_codes = ir_codes;
+
+ /* register i2c device
+ * At device register, IR codes may be changed to be
+ * board dependent.
+ */
+ err = i2c_attach_client(&ir->c);
+ if (err)
+ goto err_out_free;
+
+ /* If IR not supported or disabled, unregisters driver */
+ if (ir->get_key == NULL) {
+ err = -ENODEV;
+ goto err_out_detach;
+ }
+
+ /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
+ 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(input_dev, &ir->ir, ir_type, ir->ir_codes);
+ input_dev->id.bustype = BUS_I2C;
+ input_dev->name = ir->c.name;
+ input_dev->phys = ir->phys;
+
+ err = input_register_device(ir->input);
+ if (err)
+ goto err_out_detach;
+
+ printk(DEVNAME ": %s detected at %s [%s]\n",
+ ir->input->name, ir->input->phys, adap->name);
+
+ /* start polling via eventd */
+ INIT_WORK(&ir->work, ir_work);
+ init_timer(&ir->timer);
+ ir->timer.function = ir_timer;
+ ir->timer.data = (unsigned long)ir;
+ schedule_work(&ir->work);
+
+ return 0;
+
+ err_out_detach:
+ i2c_detach_client(&ir->c);
+ err_out_free:
+ input_free_device(input_dev);
+ kfree(ir);
+ return err;
+}
+
+static int ir_detach(struct i2c_client *client)
+{
+ struct IR_i2c *ir = i2c_get_clientdata(client);
+
+ /* kill outstanding polls */
+ del_timer_sync(&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_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
+ static const int probe_saa7134[] = { 0x7a, 0x47, 0x71, 0x2d, -1 };
+ static const int probe_em28XX[] = { 0x30, 0x47, -1 };
+ static const int probe_cx88[] = { 0x18, 0x6b, 0x71, -1 };
+ static const int probe_cx23885[] = { 0x6b, -1 };
+ const int *probe;
+ struct i2c_msg msg = {
+ .flags = I2C_M_RD,
+ .len = 0,
+ .buf = NULL,
+ };
+ int i, rc;
+
+ switch (adap->id) {
+ case I2C_HW_B_BT848:
+ probe = probe_bttv;
+ break;
+ case I2C_HW_B_CX2341X:
+ probe = probe_bttv;
+ break;
+ case I2C_HW_SAA7134:
+ probe = probe_saa7134;
+ break;
+ case I2C_HW_B_EM28XX:
+ probe = probe_em28XX;
+ break;
+ case I2C_HW_B_CX2388x:
+ probe = probe_cx88;
+ break;
+ case I2C_HW_B_CX23885:
+ probe = probe_cx23885;
+ break;
+ default:
+ return 0;
+ }
+
+ for (i = 0; -1 != probe[i]; i++) {
+ msg.addr = probe[i];
+ rc = i2c_transfer(adap, &msg, 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);
+ return 0;
+ }
+ }
+
+ /* Special case for MSI TV@nywhere Plus remote */
+ if (adap->id == I2C_HW_SAA7134) {
+ u8 temp;
+
+ /* MSI TV@nywhere Plus controller doesn't seem to
+ respond to probes unless we read something from
+ an existing device. Weird... */
+
+ msg.addr = 0x50;
+ rc = i2c_transfer(adap, &msg, 1);
+ dprintk(1, "probe 0x%02x @ %s: %s\n",
+ msg.addr, adap->name,
+ (1 == rc) ? "yes" : "no");
+
+ /* Now do the probe. The controller does not respond
+ to 0-byte reads, so we use a 1-byte read instead. */
+ msg.addr = 0x30;
+ msg.len = 1;
+ msg.buf = &temp;
+ rc = i2c_transfer(adap, &msg, 1);
+ dprintk(1, "probe 0x%02x @ %s: %s\n",
+ msg.addr, adap->name,
+ (1 == rc) ? "yes" : "no");
+ if (1 == rc)
+ ir_attach(adap, msg.addr, 0, 0);
+ }
+
+ 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 __init ir_init(void)
+{
+ return i2c_add_driver(&driver);
+}
+
+static void __exit 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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