- put new source file into cvs as well ;)

1 files changed, 392 insertions, 0 deletions

diff --git a/linux/drivers/media/video/cx88/cx88-input.c b/linux/drivers/media/video/cx88/cx88-input.c
new file mode 100644
index 000000000..ff0d1b95e
--- /dev/null
+++ b/linux/drivers/media/video/cx88/cx88-input.c
@@ -0,0 +1,392 @@
+/*
+ * $Id: cx88-input.c,v 1.1 2004/11/30 17:00:46 kraxel Exp $
+ *
+ * Device driver for GPIO attached remote control interfaces
+ * on Conexant 2388x based TV/DVB cards.
+ *
+ * Copyright (c) 2003 Pavel Machek
+ * Copyright (c) 2004 Gerd Knorr
+ * Copyright (c) 2004 Chris Pascoe
+ *
+ * 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/init.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/pci.h>
+
+#include <media/ir-common.h>
+
+#include "cx88.h"
+
+/* ---------------------------------------------------------------------- */
+
+/* DigitalNow DNTV Live DVB-T Remote */
+static IR_KEYTAB_TYPE ir_codes_dntv_live_dvb_t[IR_KEYTAB_SIZE] = {
+	[ 0x00 ] = KEY_ESC,         // 'go up a level?'
+	[ 0x01 ] = KEY_KP1,         // '1'
+	[ 0x02 ] = KEY_KP2,         // '2'
+	[ 0x03 ] = KEY_KP3,         // '3'
+	[ 0x04 ] = KEY_KP4,         // '4'
+	[ 0x05 ] = KEY_KP5,         // '5'
+	[ 0x06 ] = KEY_KP6,         // '6'
+	[ 0x07 ] = KEY_KP7,         // '7'
+	[ 0x08 ] = KEY_KP8,         // '8'
+	[ 0x09 ] = KEY_KP9,         // '9'
+	[ 0x0a ] = KEY_KP0,         // '0'
+	[ 0x0b ] = KEY_TUNER,       // 'tv/fm'
+	[ 0x0c ] = KEY_SEARCH,      // 'scan'
+	[ 0x0d ] = KEY_STOP,        // 'stop'
+	[ 0x0e ] = KEY_PAUSE,       // 'pause'
+	[ 0x0f ] = KEY_LIST,        // 'source'
+
+	[ 0x10 ] = KEY_MUTE,        // 'mute'
+	[ 0x11 ] = KEY_REWIND,      // 'backward <<'
+	[ 0x12 ] = KEY_POWER,       // 'power'
+	[ 0x13 ] = KEY_S,           // 'snap'
+	[ 0x14 ] = KEY_AUDIO,       // 'stereo'
+	[ 0x15 ] = KEY_CLEAR,       // 'reset'
+	[ 0x16 ] = KEY_PLAY,        // 'play'
+	[ 0x17 ] = KEY_ENTER,       // 'enter'
+	[ 0x18 ] = KEY_ZOOM,        // 'full screen'
+	[ 0x19 ] = KEY_FASTFORWARD, // 'forward >>'
+	[ 0x1a ] = KEY_CHANNELUP,   // 'channel +'
+	[ 0x1b ] = KEY_VOLUMEUP,    // 'volume +'
+	[ 0x1c ] = KEY_INFO,        // 'preview'
+	[ 0x1d ] = KEY_RECORD,      // 'record'
+	[ 0x1e ] = KEY_CHANNELDOWN, // 'channel -'
+	[ 0x1f ] = KEY_VOLUMEDOWN,  // 'volume -'
+};
+
+/* ---------------------------------------------------------------------- */
+
+struct cx88_IR {
+	struct cx88_core	*core;
+	struct input_dev        input;
+	struct ir_input_state   ir;
+	char                    name[32];
+	char                    phys[32];
+
+	/* sample from gpio pin 16 */
+	int                     sampling;
+	u32                     samples[16];
+	int                     scount;
+	unsigned long           release;
+
+	/* poll external decoder */
+	int                     polling;
+	struct work_struct      work;
+	struct timer_list       timer;
+	u32			gpio_addr;
+	u32                     last_gpio;
+	u32                     mask_keycode;
+	u32                     mask_keydown;
+	u32                     mask_keyup;
+};
+
+static int ir_debug = 0;
+module_param(ir_debug, int, 0644);    /* debug level [IR] */
+MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
+
+#define ir_dprintk(fmt, arg...)	if (ir_debug) \
+	printk(KERN_DEBUG "%s IR: " fmt , ir->core->name, ## arg)
+
+/* ---------------------------------------------------------------------- */
+
+static void cx88_ir_handle_key(struct cx88_IR *ir)
+{
+	struct cx88_core *core = ir->core;
+	u32 gpio, data;
+
+	/* read gpio value */
+	gpio = cx_read(ir->gpio_addr);
+	if (ir->polling) {
+		if (ir->last_gpio == gpio)
+			return;
+		ir->last_gpio = gpio;
+	}
+
+	/* extract data */
+	data = ir_extract_bits(gpio, ir->mask_keycode);
+	ir_dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
+		gpio, data,
+		ir->polling               ? "poll"  : "irq",
+		(gpio & ir->mask_keydown) ? " down" : "",
+		(gpio & ir->mask_keyup)   ? " up"   : "");
+
+	if (ir->mask_keydown) {
+		/* bit set on keydown */
+		if (gpio & ir->mask_keydown) {
+			ir_input_keydown(&ir->input,&ir->ir,data,data);
+		} else {
+			ir_input_nokey(&ir->input,&ir->ir);
+		}
+
+	} else if (ir->mask_keyup) {
+		/* bit cleared on keydown */
+		if (0 == (gpio & ir->mask_keyup)) {
+			ir_input_keydown(&ir->input,&ir->ir,data,data);
+		} else {
+			ir_input_nokey(&ir->input,&ir->ir);
+		}
+
+	} else {
+		/* can't disturgissh keydown/up :-/ */
+		ir_input_keydown(&ir->input,&ir->ir,data,data);
+		ir_input_nokey(&ir->input,&ir->ir);
+	}
+}
+
+static void ir_timer(unsigned long data)
+{
+	struct cx88_IR *ir = (struct cx88_IR*)data;
+
+	schedule_work(&ir->work);
+}
+
+static void cx88_ir_work(void *data)
+{
+	struct cx88_IR *ir = data;
+	unsigned long timeout;
+
+	cx88_ir_handle_key(ir);
+	timeout = jiffies + (ir->polling * HZ / 1000);
+	mod_timer(&ir->timer, timeout);
+}
+
+/* ---------------------------------------------------------------------- */
+
+int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
+{
+	struct cx88_IR *ir;
+	IR_KEYTAB_TYPE *ir_codes = NULL;
+	int ir_type = IR_TYPE_OTHER;
+
+	ir = kmalloc(sizeof(*ir),GFP_KERNEL);
+	if (NULL == ir)
+		return -ENOMEM;
+	memset(ir,0,sizeof(*ir));
+
+	/* detect & configure */
+	/* XXX: move this data into cx88-cards? */
+	switch (core->board) {
+	case CX88_BOARD_DNTV_LIVE_DVB_T:
+		ir_codes         = ir_codes_dntv_live_dvb_t;
+		ir->gpio_addr    = MO_GP1_IO;
+		ir->mask_keycode = 0x1f;
+		ir->mask_keyup   = 0x60;
+		ir->polling      = 50; // ms
+		break;
+	case CX88_BOARD_HAUPPAUGE:
+	case CX88_BOARD_HAUPPAUGE_DVB_T1:
+		ir_codes         = ir_codes_rc5_tv;
+		ir->sampling     = 1;
+		break;
+	}
+	if (NULL == ir_codes) {
+		kfree(ir);
+		return -ENODEV;
+	}
+
+	/* init input device */
+	snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)",
+		 core->name);
+	snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
+		 pci_name(pci));
+
+	ir_input_init(&ir->input, &ir->ir, ir_type, ir_codes);
+	ir->input.name = ir->name;
+	ir->input.phys = ir->phys;
+	ir->input.id.bustype = BUS_PCI;
+	ir->input.id.version = 1;
+	if (pci->subsystem_vendor) {
+		ir->input.id.vendor  = pci->subsystem_vendor;
+		ir->input.id.product = pci->subsystem_device;
+	} else {
+		ir->input.id.vendor  = pci->vendor;
+		ir->input.id.product = pci->device;
+	}
+
+	/* record handles to ourself */
+	ir->core = core;
+	core->ir = ir;
+
+	if (ir->polling) {
+		INIT_WORK(&ir->work, cx88_ir_work, ir);
+		init_timer(&ir->timer);
+		ir->timer.function = ir_timer;
+		ir->timer.data     = (unsigned long)ir;
+		schedule_work(&ir->work);
+	}
+	if (ir->sampling) {
+		core->pci_irqmask |= (1<<18);   // IR_SMP_INT
+		cx_write(MO_DDS_IO, 0xa80a80);  // 4 kHz sample rate
+		cx_write(MO_DDSCFG_IO,   0x5);  // enable
+	}
+
+	/* all done */
+	input_register_device(&ir->input);
+	printk("%s: registered IR remote control\n", core->name);
+
+	return 0;
+}
+
+int cx88_ir_fini(struct cx88_core *core)
+{
+	struct cx88_IR *ir = core->ir;
+
+	/* skip detach on non attached boards */
+	if (NULL == ir)
+		return 0;
+
+	if (ir->polling) {
+		del_timer(&ir->timer);
+		flush_scheduled_work();
+	}
+
+	input_unregister_device(&ir->input);
+	kfree(ir);
+
+	/* done */
+	core->ir = NULL;
+	return 0;
+}
+
+/* ---------------------------------------------------------------------- */
+
+static int inline getbit(u32 *samples, int bit)
+{
+	return (samples[bit/32] & (1 << (31-(bit%32)))) ? 1 : 0;
+}
+
+static int dump_samples(u32 *samples, int count)
+{
+	int i, bit, start;
+
+	printk(KERN_DEBUG "ir samples @ 4kHz: ");
+	start = 0;
+	for (i = 0; i < count * 32; i++) {
+		bit = getbit(samples,i);
+		if (bit)
+			start = 1;
+		if (0 == start)
+			continue;
+		printk("%s", bit ? "#" : "_");
+	}
+	printk("\n");
+}
+
+static int ir_decode_biphase(u32 *samples, int count, int low, int high)
+{
+	int i,last,bit,len,flips;
+	u32 value;
+
+	/* find start bit (1) */
+	for (i = 0; i < 32; i++) {
+		bit = getbit(samples,i);
+		if (bit)
+			break;
+	}
+
+	/* go decoding */
+	len   = 0;
+	flips = 0;
+	value = 1;
+	for (; i < count * 32; i++) {
+		if (len > high)
+			break;
+		if (flips > 1)
+			break;
+		last = bit;
+		bit  = getbit(samples,i);
+		if (last == bit) {
+			len++;
+			continue;
+		}
+		if (len < low) {
+			len++;
+			flips++;
+			continue;
+		}
+		value <<= 1;
+		value |= bit;
+		flips = 0;
+		len   = 1;
+	}
+	return value;
+}
+
+void cx88_ir_irq(struct cx88_core *core)
+{
+	struct cx88_IR *ir = core->ir;
+	u32 samples,rc5;
+	int i;
+
+	if (NULL == ir)
+		return;
+	if (!ir->sampling)
+		return;
+
+	samples = cx_read(MO_SAMPLE_IO);
+	if (0 != samples  &&  0xffffffff != samples) {
+		/* record sample data */
+		if (ir->scount < ARRAY_SIZE(ir->samples))
+			ir->samples[ir->scount++] = samples;
+		return;
+	}
+	if (!ir->scount) {
+		/* nothing to sample */
+		if (ir->ir.keypressed && time_after(jiffies,ir->release))
+			ir_input_nokey(&ir->input,&ir->ir);
+		return;
+	}
+
+	/* have a complete sample */
+	if (ir->scount < ARRAY_SIZE(ir->samples))
+		ir->samples[ir->scount++] = samples;
+	for (i = 0; i < ir->scount; i++)
+		ir->samples[i] = ~ir->samples[i];
+	if (ir_debug)
+		dump_samples(ir->samples,ir->scount);
+
+	/* decode it */
+	switch (core->board) {
+	case CX88_BOARD_HAUPPAUGE:
+	case CX88_BOARD_HAUPPAUGE_DVB_T1:
+		rc5 = ir_decode_biphase(ir->samples,ir->scount,5,7);
+		ir_dprintk("biphase decoded: %x\n",rc5);
+		if ((rc5 & 0xfffff000) != 0x3000)
+			break;
+		ir_input_keydown(&ir->input, &ir->ir, rc5 & 0x3f, rc5);
+		ir->release = jiffies + msecs_to_jiffies(100);
+		break;
+	}
+
+	ir->scount = 0;
+	return;
+}
+
+/* ---------------------------------------------------------------------- */
+
+MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
+MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
+MODULE_LICENSE("GPL");
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */