1 files changed, 589 insertions, 0 deletions

diff --git a/drivers/media/pci/bt8xx/bttv-input.c b/drivers/media/pci/bt8xx/bttv-input.c
new file mode 100644
index 000000000000..ef4c7cd41982
--- /dev/null
+++ b/drivers/media/pci/bt8xx/bttv-input.c
@@ -0,0 +1,589 @@
+/*
+ *
+ * Copyright (c) 2003 Gerd Knorr
+ * Copyright (c) 2003 Pavel Machek
+ *
+ * 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
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+
+#include "bttv.h"
+#include "bttvp.h"
+
+
+static int ir_debug;
+module_param(ir_debug, int, 0644);
+
+static int ir_rc5_remote_gap = 885;
+module_param(ir_rc5_remote_gap, int, 0644);
+
+#undef dprintk
+#define dprintk(fmt, ...)			\
+do {						\
+	if (ir_debug >= 1)			\
+		pr_info(fmt, ##__VA_ARGS__);	\
+} while (0)
+
+#define DEVNAME "bttv-input"
+
+#define MODULE_NAME "bttv"
+
+/* ---------------------------------------------------------------------- */
+
+static void ir_handle_key(struct bttv *btv)
+{
+	struct bttv_ir *ir = btv->remote;
+	u32 gpio,data;
+
+	/* read gpio value */
+	gpio = bttv_gpio_read(&btv->c);
+	if (ir->polling) {
+		if (ir->last_gpio == gpio)
+			return;
+		ir->last_gpio = gpio;
+	}
+
+	/* extract data */
+	data = ir_extract_bits(gpio, ir->mask_keycode);
+	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 && (gpio & ir->mask_keydown)) ||
+	    (ir->mask_keyup   && !(gpio & ir->mask_keyup))) {
+		rc_keydown_notimeout(ir->dev, data, 0);
+	} else {
+		/* HACK: Probably, ir->mask_keydown is missing
+		   for this board */
+		if (btv->c.type == BTTV_BOARD_WINFAST2000)
+			rc_keydown_notimeout(ir->dev, data, 0);
+
+		rc_keyup(ir->dev);
+	}
+}
+
+static void ir_enltv_handle_key(struct bttv *btv)
+{
+	struct bttv_ir *ir = btv->remote;
+	u32 gpio, data, keyup;
+
+	/* read gpio value */
+	gpio = bttv_gpio_read(&btv->c);
+
+	/* extract data */
+	data = ir_extract_bits(gpio, ir->mask_keycode);
+
+	/* Check if it is keyup */
+	keyup = (gpio & ir->mask_keyup) ? 1 << 31 : 0;
+
+	if ((ir->last_gpio & 0x7f) != data) {
+		dprintk("gpio=0x%x code=%d | %s\n",
+			gpio, data,
+			(gpio & ir->mask_keyup) ? " up" : "up/down");
+
+		rc_keydown_notimeout(ir->dev, data, 0);
+		if (keyup)
+			rc_keyup(ir->dev);
+	} else {
+		if ((ir->last_gpio & 1 << 31) == keyup)
+			return;
+
+		dprintk("(cnt) gpio=0x%x code=%d | %s\n",
+			gpio, data,
+			(gpio & ir->mask_keyup) ? " up" : "down");
+
+		if (keyup)
+			rc_keyup(ir->dev);
+		else
+			rc_keydown_notimeout(ir->dev, data, 0);
+	}
+
+	ir->last_gpio = data | keyup;
+}
+
+static int bttv_rc5_irq(struct bttv *btv);
+
+void bttv_input_irq(struct bttv *btv)
+{
+	struct bttv_ir *ir = btv->remote;
+
+	if (ir->rc5_gpio)
+		bttv_rc5_irq(btv);
+	else if (!ir->polling)
+		ir_handle_key(btv);
+}
+
+static void bttv_input_timer(unsigned long data)
+{
+	struct bttv *btv = (struct bttv*)data;
+	struct bttv_ir *ir = btv->remote;
+
+	if (btv->c.type == BTTV_BOARD_ENLTV_FM_2)
+		ir_enltv_handle_key(btv);
+	else
+		ir_handle_key(btv);
+	mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
+}
+
+/*
+ * FIXME: Nebula digi uses the legacy way to decode RC5, instead of relying
+ * on the rc-core way. As we need to be sure that both IRQ transitions are
+ * properly triggered, Better to touch it only with this hardware for
+ * testing.
+ */
+
+#define RC5_START(x)	(((x) >> 12) & 3)
+#define RC5_TOGGLE(x)	(((x) >> 11) & 1)
+#define RC5_ADDR(x)	(((x) >> 6) & 31)
+#define RC5_INSTR(x)	((x) & 63)
+
+/* decode raw bit pattern to RC5 code */
+static u32 bttv_rc5_decode(unsigned int code)
+{
+	unsigned int org_code = code;
+	unsigned int pair;
+	unsigned int rc5 = 0;
+	int i;
+
+	for (i = 0; i < 14; ++i) {
+		pair = code & 0x3;
+		code >>= 2;
+
+		rc5 <<= 1;
+		switch (pair) {
+		case 0:
+		case 2:
+			break;
+		case 1:
+			rc5 |= 1;
+		break;
+		case 3:
+			dprintk("rc5_decode(%x) bad code\n",
+				org_code);
+			return 0;
+		}
+	}
+	dprintk("code=%x, rc5=%x, start=%x, toggle=%x, address=%x, "
+		"instr=%x\n", rc5, org_code, RC5_START(rc5),
+		RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
+	return rc5;
+}
+
+static void bttv_rc5_timer_end(unsigned long data)
+{
+	struct bttv_ir *ir = (struct bttv_ir *)data;
+	struct timeval tv;
+	u32 gap;
+	u32 rc5 = 0;
+
+	/* get time */
+	do_gettimeofday(&tv);
+
+	/* avoid overflow with gap >1s */
+	if (tv.tv_sec - ir->base_time.tv_sec > 1) {
+		gap = 200000;
+	} else {
+		gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
+		    tv.tv_usec - ir->base_time.tv_usec;
+	}
+
+	/* signal we're ready to start a new code */
+	ir->active = false;
+
+	/* Allow some timer jitter (RC5 is ~24ms anyway so this is ok) */
+	if (gap < 28000) {
+		dprintk("spurious timer_end\n");
+		return;
+	}
+
+	if (ir->last_bit < 20) {
+		/* ignore spurious codes (caused by light/other remotes) */
+		dprintk("short code: %x\n", ir->code);
+	} else {
+		ir->code = (ir->code << ir->shift_by) | 1;
+		rc5 = bttv_rc5_decode(ir->code);
+
+		/* two start bits? */
+		if (RC5_START(rc5) != ir->start) {
+			pr_info(DEVNAME ":"
+			       " rc5 start bits invalid: %u\n", RC5_START(rc5));
+
+			/* right address? */
+		} else if (RC5_ADDR(rc5) == ir->addr) {
+			u32 toggle = RC5_TOGGLE(rc5);
+			u32 instr = RC5_INSTR(rc5);
+
+			/* Good code */
+			rc_keydown(ir->dev, instr, toggle);
+			dprintk("instruction %x, toggle %x\n",
+				instr, toggle);
+		}
+	}
+}
+
+static int bttv_rc5_irq(struct bttv *btv)
+{
+	struct bttv_ir *ir = btv->remote;
+	struct timeval tv;
+	u32 gpio;
+	u32 gap;
+	unsigned long current_jiffies;
+
+	/* read gpio port */
+	gpio = bttv_gpio_read(&btv->c);
+
+	/* get time of bit */
+	current_jiffies = jiffies;
+	do_gettimeofday(&tv);
+
+	/* avoid overflow with gap >1s */
+	if (tv.tv_sec - ir->base_time.tv_sec > 1) {
+		gap = 200000;
+	} else {
+		gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
+		    tv.tv_usec - ir->base_time.tv_usec;
+	}
+
+	dprintk("RC5 IRQ: gap %d us for %s\n",
+		gap, (gpio & 0x20) ? "mark" : "space");
+
+	/* remote IRQ? */
+	if (!(gpio & 0x20))
+		return 0;
+
+	/* active code => add bit */
+	if (ir->active) {
+		/* only if in the code (otherwise spurious IRQ or timer
+		   late) */
+		if (ir->last_bit < 28) {
+			ir->last_bit = (gap - ir_rc5_remote_gap / 2) /
+			    ir_rc5_remote_gap;
+			ir->code |= 1 << ir->last_bit;
+		}
+		/* starting new code */
+	} else {
+		ir->active = true;
+		ir->code = 0;
+		ir->base_time = tv;
+		ir->last_bit = 0;
+
+		mod_timer(&ir->timer, current_jiffies + msecs_to_jiffies(30));
+	}
+
+	/* toggle GPIO pin 4 to reset the irq */
+	bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
+	bttv_gpio_write(&btv->c, gpio | (1 << 4));
+	return 1;
+}
+
+/* ---------------------------------------------------------------------- */
+
+static void bttv_ir_start(struct bttv *btv, struct bttv_ir *ir)
+{
+	if (ir->polling) {
+		setup_timer(&ir->timer, bttv_input_timer, (unsigned long)btv);
+		ir->timer.expires  = jiffies + msecs_to_jiffies(1000);
+		add_timer(&ir->timer);
+	} else if (ir->rc5_gpio) {
+		/* set timer_end for code completion */
+		setup_timer(&ir->timer, bttv_rc5_timer_end, (unsigned long)ir);
+		ir->shift_by = 1;
+		ir->start = 3;
+		ir->addr = 0x0;
+		ir->rc5_remote_gap = ir_rc5_remote_gap;
+	}
+}
+
+static void bttv_ir_stop(struct bttv *btv)
+{
+	if (btv->remote->polling)
+		del_timer_sync(&btv->remote->timer);
+
+	if (btv->remote->rc5_gpio) {
+		u32 gpio;
+
+		del_timer_sync(&btv->remote->timer);
+
+		gpio = bttv_gpio_read(&btv->c);
+		bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
+	}
+}
+
+/*
+ * Get_key functions used by I2C remotes
+ */
+
+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("read error\n");
+		return -EIO;
+	}
+
+	/* ignore 0xaa */
+	if (b==0xaa)
+		return 0;
+	dprintk("key %02x\n", b);
+
+	/*
+	 * NOTE:
+	 * lirc_i2c maps the pv951 code as:
+	 *	addr = 0x61D6
+	 * 	cmd = bit_reverse (b)
+	 * So, it seems that this device uses NEC extended
+	 * I decided to not fix the table, due to two reasons:
+	 * 	1) Without the actual device, this is only a guess;
+	 * 	2) As the addr is not reported via I2C, nor can be changed,
+	 * 	   the device is bound to the vendor-provided RC.
+	 */
+
+	*ir_key = b;
+	*ir_raw = b;
+	return 1;
+}
+
+/* Instantiate the I2C IR receiver device, if present */
+void __devinit init_bttv_i2c_ir(struct bttv *btv)
+{
+	const unsigned short addr_list[] = {
+		0x1a, 0x18, 0x64, 0x30, 0x71,
+		I2C_CLIENT_END
+	};
+	struct i2c_board_info info;
+
+	if (0 != btv->i2c_rc)
+		return;
+
+	memset(&info, 0, sizeof(struct i2c_board_info));
+	memset(&btv->init_data, 0, sizeof(btv->init_data));
+	strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
+
+	switch (btv->c.type) {
+	case BTTV_BOARD_PV951:
+		btv->init_data.name = "PV951";
+		btv->init_data.get_key = get_key_pv951;
+		btv->init_data.ir_codes = RC_MAP_PV951;
+		info.addr = 0x4b;
+		break;
+	default:
+		/*
+		 * 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
+		 */
+
+		i2c_new_probed_device(&btv->c.i2c_adap, &info, addr_list, NULL);
+		return;
+	}
+
+	if (btv->init_data.name)
+		info.platform_data = &btv->init_data;
+	i2c_new_device(&btv->c.i2c_adap, &info);
+
+	return;
+}
+
+int __devexit fini_bttv_i2c(struct bttv *btv)
+{
+	if (0 != btv->i2c_rc)
+		return 0;
+
+	return i2c_del_adapter(&btv->c.i2c_adap);
+}
+
+int bttv_input_init(struct bttv *btv)
+{
+	struct bttv_ir *ir;
+	char *ir_codes = NULL;
+	struct rc_dev *rc;
+	int err = -ENOMEM;
+
+	if (!btv->has_remote)
+		return -ENODEV;
+
+	ir = kzalloc(sizeof(*ir),GFP_KERNEL);
+	rc = rc_allocate_device();
+	if (!ir || !rc)
+		goto err_out_free;
+
+	/* detect & configure */
+	switch (btv->c.type) {
+	case BTTV_BOARD_AVERMEDIA:
+	case BTTV_BOARD_AVPHONE98:
+	case BTTV_BOARD_AVERMEDIA98:
+		ir_codes         = RC_MAP_AVERMEDIA;
+		ir->mask_keycode = 0xf88000;
+		ir->mask_keydown = 0x010000;
+		ir->polling      = 50; // ms
+		break;
+
+	case BTTV_BOARD_AVDVBT_761:
+	case BTTV_BOARD_AVDVBT_771:
+		ir_codes         = RC_MAP_AVERMEDIA_DVBT;
+		ir->mask_keycode = 0x0f00c0;
+		ir->mask_keydown = 0x000020;
+		ir->polling      = 50; // ms
+		break;
+
+	case BTTV_BOARD_PXELVWPLTVPAK:
+		ir_codes         = RC_MAP_PIXELVIEW;
+		ir->mask_keycode = 0x003e00;
+		ir->mask_keyup   = 0x010000;
+		ir->polling      = 50; // ms
+		break;
+	case BTTV_BOARD_PV_M4900:
+	case BTTV_BOARD_PV_BT878P_9B:
+	case BTTV_BOARD_PV_BT878P_PLUS:
+		ir_codes         = RC_MAP_PIXELVIEW;
+		ir->mask_keycode = 0x001f00;
+		ir->mask_keyup   = 0x008000;
+		ir->polling      = 50; // ms
+		break;
+
+	case BTTV_BOARD_WINFAST2000:
+		ir_codes         = RC_MAP_WINFAST;
+		ir->mask_keycode = 0x1f8;
+		break;
+	case BTTV_BOARD_MAGICTVIEW061:
+	case BTTV_BOARD_MAGICTVIEW063:
+		ir_codes         = RC_MAP_WINFAST;
+		ir->mask_keycode = 0x0008e000;
+		ir->mask_keydown = 0x00200000;
+		break;
+	case BTTV_BOARD_APAC_VIEWCOMP:
+		ir_codes         = RC_MAP_APAC_VIEWCOMP;
+		ir->mask_keycode = 0x001f00;
+		ir->mask_keyup   = 0x008000;
+		ir->polling      = 50; // ms
+		break;
+	case BTTV_BOARD_ASKEY_CPH03X:
+	case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
+	case BTTV_BOARD_CONTVFMI:
+		ir_codes         = RC_MAP_PIXELVIEW;
+		ir->mask_keycode = 0x001F00;
+		ir->mask_keyup   = 0x006000;
+		ir->polling      = 50; // ms
+		break;
+	case BTTV_BOARD_NEBULA_DIGITV:
+		ir_codes = RC_MAP_NEBULA;
+		ir->rc5_gpio = true;
+		break;
+	case BTTV_BOARD_MACHTV_MAGICTV:
+		ir_codes         = RC_MAP_APAC_VIEWCOMP;
+		ir->mask_keycode = 0x001F00;
+		ir->mask_keyup   = 0x004000;
+		ir->polling      = 50; /* ms */
+		break;
+	case BTTV_BOARD_KOZUMI_KTV_01C:
+		ir_codes         = RC_MAP_PCTV_SEDNA;
+		ir->mask_keycode = 0x001f00;
+		ir->mask_keyup   = 0x006000;
+		ir->polling      = 50; /* ms */
+		break;
+	case BTTV_BOARD_ENLTV_FM_2:
+		ir_codes         = RC_MAP_ENCORE_ENLTV2;
+		ir->mask_keycode = 0x00fd00;
+		ir->mask_keyup   = 0x000080;
+		ir->polling      = 1; /* ms */
+		ir->last_gpio    = ir_extract_bits(bttv_gpio_read(&btv->c),
+						   ir->mask_keycode);
+		break;
+	}
+	if (NULL == ir_codes) {
+		dprintk("Ooops: IR config error [card=%d]\n", btv->c.type);
+		err = -ENODEV;
+		goto err_out_free;
+	}
+
+	if (ir->rc5_gpio) {
+		u32 gpio;
+		/* enable remote irq */
+		bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4);
+		gpio = bttv_gpio_read(&btv->c);
+		bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
+		bttv_gpio_write(&btv->c, gpio | (1 << 4));
+	} else {
+		/* init hardware-specific stuff */
+		bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0);
+	}
+
+	/* init input device */
+	ir->dev = rc;
+
+	snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
+		 btv->c.type);
+	snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
+		 pci_name(btv->c.pci));
+
+	rc->input_name = ir->name;
+	rc->input_phys = ir->phys;
+	rc->input_id.bustype = BUS_PCI;
+	rc->input_id.version = 1;
+	if (btv->c.pci->subsystem_vendor) {
+		rc->input_id.vendor  = btv->c.pci->subsystem_vendor;
+		rc->input_id.product = btv->c.pci->subsystem_device;
+	} else {
+		rc->input_id.vendor  = btv->c.pci->vendor;
+		rc->input_id.product = btv->c.pci->device;
+	}
+	rc->dev.parent = &btv->c.pci->dev;
+	rc->map_name = ir_codes;
+	rc->driver_name = MODULE_NAME;
+
+	btv->remote = ir;
+	bttv_ir_start(btv, ir);
+
+	/* all done */
+	err = rc_register_device(rc);
+	if (err)
+		goto err_out_stop;
+
+	return 0;
+
+ err_out_stop:
+	bttv_ir_stop(btv);
+	btv->remote = NULL;
+ err_out_free:
+	rc_free_device(rc);
+	kfree(ir);
+	return err;
+}
+
+void bttv_input_fini(struct bttv *btv)
+{
+	if (btv->remote == NULL)
+		return;
+
+	bttv_ir_stop(btv);
+	rc_unregister_device(btv->remote->dev);
+	kfree(btv->remote);
+	btv->remote = NULL;
+}