1 files changed, 492 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 000000000000..92664f75d327
--- /dev/null
+++ b/drivers/media/video/ir-kbd-i2c.c
@@ -0,0 +1,492 @@
+/*
+ * $Id: ir-kbd-i2c.c,v 1.10 2004/12/09 12:51:35 kraxel Exp $
+ *
+ * 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>
+
+/* Mark Phalan <phalanm@o2.ie> */
+static IR_KEYTAB_TYPE ir_codes_pv951[IR_KEYTAB_SIZE] = {
+        [  0 ] = KEY_KP0,
+        [  1 ] = KEY_KP1,
+        [  2 ] = KEY_KP2,
+        [  3 ] = KEY_KP3,
+        [  4 ] = KEY_KP4,
+        [  5 ] = KEY_KP5,
+        [  6 ] = KEY_KP6,
+        [  7 ] = KEY_KP7,
+        [  8 ] = KEY_KP8,
+        [  9 ] = KEY_KP9,
+
+        [ 18 ] = KEY_POWER,
+        [ 16 ] = KEY_MUTE,
+        [ 31 ] = KEY_VOLUMEDOWN,
+        [ 27 ] = KEY_VOLUMEUP,
+        [ 26 ] = KEY_CHANNELUP,
+        [ 30 ] = KEY_CHANNELDOWN,
+        [ 14 ] = KEY_PAGEUP,
+        [ 29 ] = KEY_PAGEDOWN,
+        [ 19 ] = KEY_SOUND,
+
+        [ 24 ] = KEY_KPPLUSMINUS,       // CH +/-
+        [ 22 ] = KEY_SUBTITLE,          // CC
+        [ 13 ] = KEY_TEXT,              // TTX
+        [ 11 ] = KEY_TV,                // AIR/CBL
+        [ 17 ] = KEY_PC,                // PC/TV
+        [ 23 ] = KEY_OK,                // CH RTN
+        [ 25 ] = KEY_MODE,              // FUNC
+        [ 12 ] = KEY_SEARCH,            // AUTOSCAN
+
+        /* Not sure what to do with these ones! */
+        [ 15 ] = KEY_SELECT,            // SOURCE
+        [ 10 ] = KEY_KPPLUS,            // +100
+        [ 20 ] = KEY_KPEQUAL,           // SYNC
+        [ 28 ] = KEY_MEDIA,             // PC/TV
+};
+
+static IR_KEYTAB_TYPE ir_codes_purpletv[IR_KEYTAB_SIZE] = {
+        [ 0x3  ] = KEY_POWER,
+        [ 0x6f ] = KEY_MUTE,
+        [ 0x10 ] = KEY_BACKSPACE,       // Recall
+
+        [ 0x11 ] = KEY_KP0,
+        [ 0x4  ] = KEY_KP1,
+        [ 0x5  ] = KEY_KP2,
+        [ 0x6  ] = KEY_KP3,
+        [ 0x8  ] = KEY_KP4,
+        [ 0x9  ] = KEY_KP5,
+        [ 0xa  ] = KEY_KP6,
+        [ 0xc  ] = KEY_KP7,
+        [ 0xd  ] = KEY_KP8,
+        [ 0xe  ] = KEY_KP9,
+        [ 0x12 ] = KEY_KPDOT,           // 100+
+
+        [ 0x7  ] = KEY_VOLUMEUP,
+        [ 0xb  ] = KEY_VOLUMEDOWN,
+        [ 0x1a ] = KEY_KPPLUS,
+        [ 0x18 ] = KEY_KPMINUS,
+        [ 0x15 ] = KEY_UP,
+        [ 0x1d ] = KEY_DOWN,
+        [ 0xf  ] = KEY_CHANNELUP,
+        [ 0x13 ] = KEY_CHANNELDOWN,
+        [ 0x48 ] = KEY_ZOOM,
+
+        [ 0x1b ] = KEY_VIDEO,           // Video source
+#if 0
+        [ 0x1f ] = KEY_S,               // Snapshot
+#endif
+        [ 0x49 ] = KEY_LANGUAGE,        // MTS Select
+        [ 0x19 ] = KEY_SEARCH,          // Auto Scan
+
+        [ 0x4b ] = KEY_RECORD,
+        [ 0x46 ] = KEY_PLAY,
+        [ 0x45 ] = KEY_PAUSE,           // Pause
+        [ 0x44 ] = KEY_STOP,
+#if 0
+        [ 0x43 ] = KEY_T,               // Time Shift
+        [ 0x47 ] = KEY_Y,               // Time Shift OFF
+        [ 0x4a ] = KEY_O,               // TOP
+        [ 0x17 ] = KEY_F,               // SURF CH
+#endif
+        [ 0x40 ] = KEY_FORWARD,         // Forward ?
+        [ 0x42 ] = KEY_REWIND,          // Backward ?
+
+};
+
+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 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 int get_key_purpletv(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;
+        }
+
+        /* no button press */
+        if (b==0)
+                return 0;
+
+        /* repeating */
+        if (b & 0x80)
+                return 1;
+
+        *ir_key = b;
+        *ir_raw = b;
+        return 1;
+}
+/* ----------------------------------------------------------------------- */
+
+static void ir_key_poll(struct IR *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 *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_pv951;
+                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;
+        case 0x7a:
+                name        = "Purple TV";
+                ir->get_key = get_key_purpletv;
+                ir_type     = IR_TYPE_OTHER;
+                ir_codes    = ir_codes_purpletv;
+                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 [%s]\n",
+               ir->input.name,ir->input.phys,adap->name);
+
+        /* 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_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
+        static const int probe_saa7134[] = { 0x7a, -1 };
+        const int *probe = NULL;
+        struct i2c_client c; char buf; int i,rc;
+
+        switch (adap->id) {
+        case I2C_ALGO_BIT | I2C_HW_B_BT848:
+                probe = probe_bttv;
+                break;
+        case I2C_ALGO_SAA7134:
+                probe = probe_saa7134;
+                break;
+        }
+        if (NULL == probe)
+                return 0;
+
+        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 __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:
+ */