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path: root/drivers/media/i2c/ir-kbd-i2c.c
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Diffstat (limited to 'drivers/media/i2c/ir-kbd-i2c.c')
-rw-r--r--drivers/media/i2c/ir-kbd-i2c.c489
1 files changed, 489 insertions, 0 deletions
diff --git a/drivers/media/i2c/ir-kbd-i2c.c b/drivers/media/i2c/ir-kbd-i2c.c
new file mode 100644
index 000000000000..04f192a0398a
--- /dev/null
+++ b/drivers/media/i2c/ir-kbd-i2c.c
@@ -0,0 +1,489 @@
+/*
+ *
+ * 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>
+ * modified for AVerMedia Cardbus by
+ * Oldrich Jedlicka <oldium.pro@seznam.cz>
+ *
+ * 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/workqueue.h>
+
+#include <media/rc-core.h>
+#include <media/ir-kbd-i2c.h>
+
+/* ----------------------------------------------------------------------- */
+/* insmod parameters */
+
+static int debug;
+module_param(debug, int, 0644); /* debug level (0,1,2) */
+
+
+#define MODULE_NAME "ir-kbd-i2c"
+#define dprintk(level, fmt, arg...) if (debug >= level) \
+ printk(KERN_DEBUG MODULE_NAME ": " 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 (!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 = (dev << 8) | code;
+ *ir_raw = ircode;
+ return 1;
+}
+
+static 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 int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
+{
+ int ret;
+ unsigned char buf[1] = { 0 };
+
+ /*
+ * This is the same apparent "are you ready?" poll command observed
+ * watching Windows driver traffic and implemented in lirc_zilog. With
+ * this added, we get far saner remote behavior with z8 chips on usb
+ * connected devices, even with the default polling interval of 100ms.
+ */
+ ret = i2c_master_send(ir->c, buf, 1);
+ if (ret != 1)
+ return (ret < 0) ? ret : -EINVAL;
+
+ 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_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 int get_key_avermedia_cardbus(struct IR_i2c *ir,
+ u32 *ir_key, u32 *ir_raw)
+{
+ unsigned char subaddr, key, keygroup;
+ struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
+ .buf = &subaddr, .len = 1},
+ { .addr = ir->c->addr, .flags = I2C_M_RD,
+ .buf = &key, .len = 1} };
+ subaddr = 0x0d;
+ if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
+ dprintk(1, "read error\n");
+ return -EIO;
+ }
+
+ if (key == 0xff)
+ return 0;
+
+ subaddr = 0x0b;
+ msg[1].buf = &keygroup;
+ if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
+ dprintk(1, "read error\n");
+ return -EIO;
+ }
+
+ if (keygroup == 0xff)
+ return 0;
+
+ dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
+ if (keygroup < 2 || keygroup > 3) {
+ /* Only a warning */
+ dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
+ keygroup, key);
+ }
+ key |= (keygroup & 1) << 6;
+
+ *ir_key = key;
+ *ir_raw = key;
+ return 1;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int ir_key_poll(struct IR_i2c *ir)
+{
+ static u32 ir_key, ir_raw;
+ int rc;
+
+ dprintk(3, "%s\n", __func__);
+ rc = ir->get_key(ir, &ir_key, &ir_raw);
+ if (rc < 0) {
+ dprintk(2,"error\n");
+ return rc;
+ }
+
+ if (rc) {
+ dprintk(1, "%s: keycode = 0x%04x\n", __func__, ir_key);
+ rc_keydown(ir->rc, ir_key, 0);
+ }
+ return 0;
+}
+
+static void ir_work(struct work_struct *work)
+{
+ int rc;
+ struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
+
+ rc = ir_key_poll(ir);
+ if (rc == -ENODEV) {
+ rc_unregister_device(ir->rc);
+ ir->rc = NULL;
+ return;
+ }
+
+ schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval));
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ char *ir_codes = NULL;
+ const char *name = NULL;
+ u64 rc_type = RC_TYPE_UNKNOWN;
+ struct IR_i2c *ir;
+ struct rc_dev *rc = NULL;
+ struct i2c_adapter *adap = client->adapter;
+ unsigned short addr = client->addr;
+ int err;
+
+ ir = kzalloc(sizeof(struct IR_i2c), GFP_KERNEL);
+ if (!ir)
+ return -ENOMEM;
+
+ ir->c = client;
+ ir->polling_interval = DEFAULT_POLLING_INTERVAL;
+ i2c_set_clientdata(client, ir);
+
+ switch(addr) {
+ case 0x64:
+ name = "Pixelview";
+ ir->get_key = get_key_pixelview;
+ rc_type = RC_TYPE_OTHER;
+ ir_codes = RC_MAP_EMPTY;
+ break;
+ case 0x18:
+ case 0x1f:
+ case 0x1a:
+ name = "Hauppauge";
+ ir->get_key = get_key_haup;
+ rc_type = RC_TYPE_RC5;
+ ir_codes = RC_MAP_HAUPPAUGE;
+ break;
+ case 0x30:
+ name = "KNC One";
+ ir->get_key = get_key_knc1;
+ rc_type = RC_TYPE_OTHER;
+ ir_codes = RC_MAP_EMPTY;
+ break;
+ case 0x6b:
+ name = "FusionHDTV";
+ ir->get_key = get_key_fusionhdtv;
+ rc_type = RC_TYPE_RC5;
+ ir_codes = RC_MAP_FUSIONHDTV_MCE;
+ break;
+ case 0x40:
+ name = "AVerMedia Cardbus remote";
+ ir->get_key = get_key_avermedia_cardbus;
+ rc_type = RC_TYPE_OTHER;
+ ir_codes = RC_MAP_AVERMEDIA_CARDBUS;
+ break;
+ case 0x71:
+ name = "Hauppauge/Zilog Z8";
+ ir->get_key = get_key_haup_xvr;
+ rc_type = RC_TYPE_RC5;
+ ir_codes = RC_MAP_HAUPPAUGE;
+ break;
+ }
+
+ /* Let the caller override settings */
+ if (client->dev.platform_data) {
+ const struct IR_i2c_init_data *init_data =
+ client->dev.platform_data;
+
+ ir_codes = init_data->ir_codes;
+ rc = init_data->rc_dev;
+
+ name = init_data->name;
+ if (init_data->type)
+ rc_type = init_data->type;
+
+ if (init_data->polling_interval)
+ ir->polling_interval = init_data->polling_interval;
+
+ switch (init_data->internal_get_key_func) {
+ case IR_KBD_GET_KEY_CUSTOM:
+ /* The bridge driver provided us its own function */
+ ir->get_key = init_data->get_key;
+ break;
+ case IR_KBD_GET_KEY_PIXELVIEW:
+ ir->get_key = get_key_pixelview;
+ break;
+ case IR_KBD_GET_KEY_HAUP:
+ ir->get_key = get_key_haup;
+ break;
+ case IR_KBD_GET_KEY_KNC1:
+ ir->get_key = get_key_knc1;
+ break;
+ case IR_KBD_GET_KEY_FUSIONHDTV:
+ ir->get_key = get_key_fusionhdtv;
+ break;
+ case IR_KBD_GET_KEY_HAUP_XVR:
+ ir->get_key = get_key_haup_xvr;
+ break;
+ case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS:
+ ir->get_key = get_key_avermedia_cardbus;
+ break;
+ }
+ }
+
+ if (!rc) {
+ /*
+ * If platform_data doesn't specify rc_dev, initilize it
+ * internally
+ */
+ rc = rc_allocate_device();
+ if (!rc) {
+ err = -ENOMEM;
+ goto err_out_free;
+ }
+ }
+ ir->rc = rc;
+
+ /* Make sure we are all setup before going on */
+ if (!name || !ir->get_key || !rc_type || !ir_codes) {
+ dprintk(1, ": Unsupported device at address 0x%02x\n",
+ addr);
+ err = -ENODEV;
+ goto err_out_free;
+ }
+
+ /* Sets name */
+ snprintf(ir->name, sizeof(ir->name), "i2c IR (%s)", name);
+ ir->ir_codes = ir_codes;
+
+ snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
+ dev_name(&adap->dev),
+ dev_name(&client->dev));
+
+ /*
+ * Initialize input_dev fields
+ * It doesn't make sense to allow overriding them via platform_data
+ */
+ rc->input_id.bustype = BUS_I2C;
+ rc->input_phys = ir->phys;
+ rc->input_name = ir->name;
+
+ /*
+ * Initialize the other fields of rc_dev
+ */
+ rc->map_name = ir->ir_codes;
+ rc->allowed_protos = rc_type;
+ if (!rc->driver_name)
+ rc->driver_name = MODULE_NAME;
+
+ err = rc_register_device(rc);
+ if (err)
+ goto err_out_free;
+
+ printk(MODULE_NAME ": %s detected at %s [%s]\n",
+ ir->name, ir->phys, adap->name);
+
+ /* start polling via eventd */
+ INIT_DELAYED_WORK(&ir->work, ir_work);
+ schedule_delayed_work(&ir->work, 0);
+
+ return 0;
+
+ err_out_free:
+ /* Only frees rc if it were allocated internally */
+ rc_free_device(rc);
+ kfree(ir);
+ return err;
+}
+
+static int ir_remove(struct i2c_client *client)
+{
+ struct IR_i2c *ir = i2c_get_clientdata(client);
+
+ /* kill outstanding polls */
+ cancel_delayed_work_sync(&ir->work);
+
+ /* unregister device */
+ if (ir->rc)
+ rc_unregister_device(ir->rc);
+
+ /* free memory */
+ kfree(ir);
+ return 0;
+}
+
+static const struct i2c_device_id ir_kbd_id[] = {
+ /* Generic entry for any IR receiver */
+ { "ir_video", 0 },
+ /* IR device specific entries should be added here */
+ { "ir_rx_z8f0811_haup", 0 },
+ { "ir_rx_z8f0811_hdpvr", 0 },
+ { }
+};
+
+static struct i2c_driver ir_kbd_driver = {
+ .driver = {
+ .name = "ir-kbd-i2c",
+ },
+ .probe = ir_probe,
+ .remove = ir_remove,
+ .id_table = ir_kbd_id,
+};
+
+module_i2c_driver(ir_kbd_driver);
+
+/* ----------------------------------------------------------------------- */
+
+MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
+MODULE_DESCRIPTION("input driver for i2c IR remote controls");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-08 17:50:31 +0300