drivers/media/pci/cx88/cx88-input.c - kernel/msm-4.9 - Gitiles

 /*
  *
  * 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, 2005 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/hrtimer.h>
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/module.h>

 #include "cx88.h"
 #include <media/rc-core.h>

 #define MODULE_NAME "cx88xx"

 /* ---------------------------------------------------------------------- */

 struct cx88_IR {
 	struct cx88_core *core;
 	struct rc_dev *dev;

 	int users;

 	char name[32];
 	char phys[32];

 	/* sample from gpio pin 16 */
 	u32 sampling;

 	/* poll external decoder */
 	int polling;
 	struct hrtimer timer;
 	u32 gpio_addr;
 	u32 last_gpio;
 	u32 mask_keycode;
 	u32 mask_keydown;
 	u32 mask_keyup;
 };

 static unsigned ir_samplerate = 4;
 module_param(ir_samplerate, uint, 0444);
 MODULE_PARM_DESC(ir_samplerate, "IR samplerate in kHz, 1 - 20, default 4");

 static int ir_debug;
 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)

 #define dprintk(fmt, arg...)	if (ir_debug) \
 	printk(KERN_DEBUG "cx88 IR: " fmt , ##arg)

 /* ---------------------------------------------------------------------- */

 static void cx88_ir_handle_key(struct cx88_IR *ir)
 {
 	struct cx88_core *core = ir->core;
 	u32 gpio, data, auxgpio;

 	/* read gpio value */
 	gpio = cx_read(ir->gpio_addr);
 	switch (core->boardnr) {
 	case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
 		/* This board apparently uses a combination of 2 GPIO
 		   to represent the keys. Additionally, the second GPIO
 		   can be used for parity.

 		   Example:

 		   for key "5"
 			gpio = 0x758, auxgpio = 0xe5 or 0xf5
 		   for key "Power"
 			gpio = 0x758, auxgpio = 0xed or 0xfd
 		 */

 		auxgpio = cx_read(MO_GP1_IO);
 		/* Take out the parity part */
 		gpio=(gpio & 0x7fd) + (auxgpio & 0xef);
 		break;
 	case CX88_BOARD_WINFAST_DTV1000:
 	case CX88_BOARD_WINFAST_DTV1800H:
 	case CX88_BOARD_WINFAST_DTV1800H_XC4000:
 	case CX88_BOARD_WINFAST_DTV2000H_PLUS:
 	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL:
 	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F36:
 	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F43:
 		gpio = (gpio & 0x6ff) | ((cx_read(MO_GP1_IO) << 8) & 0x900);
 		auxgpio = gpio;
 		break;
 	default:
 		auxgpio = gpio;
 	}
 	if (ir->polling) {
 		if (ir->last_gpio == auxgpio)
 			return;
 		ir->last_gpio = auxgpio;
 	}

 	/* 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->core->boardnr == CX88_BOARD_NORWOOD_MICRO) {
 		u32 gpio_key = cx_read(MO_GP0_IO);

 		data = (data << 4) | ((gpio_key & 0xf0) >> 4);

 		rc_keydown(ir->dev, data, 0);

 	} else if (ir->mask_keydown) {
 		/* bit set on keydown */
 		if (gpio & ir->mask_keydown)
 			rc_keydown_notimeout(ir->dev, data, 0);
 		else
 			rc_keyup(ir->dev);

 	} else if (ir->mask_keyup) {
 		/* bit cleared on keydown */
 		if (0 == (gpio & ir->mask_keyup))
 			rc_keydown_notimeout(ir->dev, data, 0);
 		else
 			rc_keyup(ir->dev);

 	} else {
 		/* can't distinguish keydown/up :-/ */
 		rc_keydown_notimeout(ir->dev, data, 0);
 		rc_keyup(ir->dev);
 	}
 }

 static enum hrtimer_restart cx88_ir_work(struct hrtimer *timer)
 {
 	unsigned long missed;
 	struct cx88_IR *ir = container_of(timer, struct cx88_IR, timer);

 	cx88_ir_handle_key(ir);
 	missed = hrtimer_forward_now(&ir->timer,
 				     ktime_set(0, ir->polling * 1000000));
 	if (missed > 1)
 		ir_dprintk("Missed ticks %ld\n", missed - 1);

 	return HRTIMER_RESTART;
 }

 static int __cx88_ir_start(void *priv)
 {
 	struct cx88_core *core = priv;
 	struct cx88_IR *ir;

 	if (!core || !core->ir)
 		return -EINVAL;

 	ir = core->ir;

 	if (ir->polling) {
 		hrtimer_init(&ir->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 		ir->timer.function = cx88_ir_work;
 		hrtimer_start(&ir->timer,
 			      ktime_set(0, ir->polling * 1000000),
 			      HRTIMER_MODE_REL);
 	}
 	if (ir->sampling) {
 		core->pci_irqmask |= PCI_INT_IR_SMPINT;
 		cx_write(MO_DDS_IO, 0x33F286 * ir_samplerate); /* samplerate */
 		cx_write(MO_DDSCFG_IO, 0x5); /* enable */
 	}
 	return 0;
 }

 static void __cx88_ir_stop(void *priv)
 {
 	struct cx88_core *core = priv;
 	struct cx88_IR *ir;

 	if (!core || !core->ir)
 		return;

 	ir = core->ir;
 	if (ir->sampling) {
 		cx_write(MO_DDSCFG_IO, 0x0);
 		core->pci_irqmask &= ~PCI_INT_IR_SMPINT;
 	}

 	if (ir->polling)
 		hrtimer_cancel(&ir->timer);
 }

 int cx88_ir_start(struct cx88_core *core)
 {
 	if (core->ir->users)
 		return __cx88_ir_start(core);

 	return 0;
 }

 void cx88_ir_stop(struct cx88_core *core)
 {
 	if (core->ir->users)
 		__cx88_ir_stop(core);
 }

 static int cx88_ir_open(struct rc_dev *rc)
 {
 	struct cx88_core *core = rc->priv;

 	core->ir->users++;
 	return __cx88_ir_start(core);
 }

 static void cx88_ir_close(struct rc_dev *rc)
 {
 	struct cx88_core *core = rc->priv;

 	core->ir->users--;
 	if (!core->ir->users)
 		__cx88_ir_stop(core);
 }

 /* ---------------------------------------------------------------------- */

 int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
 {
 	struct cx88_IR *ir;
 	struct rc_dev *dev;
 	char *ir_codes = NULL;
 	u64 rc_type = RC_BIT_OTHER;
 	int err = -ENOMEM;
 	u32 hardware_mask = 0;	/* For devices with a hardware mask, when
 				 * used with a full-code IR table
 				 */

 	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 	dev = rc_allocate_device();
 	if (!ir || !dev)
 		goto err_out_free;

 	ir->dev = dev;

 	/* detect & configure */
 	switch (core->boardnr) {
 	case CX88_BOARD_DNTV_LIVE_DVB_T:
 	case CX88_BOARD_KWORLD_DVB_T:
 	case CX88_BOARD_KWORLD_DVB_T_CX22702:
 		ir_codes = RC_MAP_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_TERRATEC_CINERGY_1400_DVB_T1:
 		ir_codes = RC_MAP_CINERGY_1400;
 		ir->sampling = 0xeb04; /* address */
 		break;
 	case CX88_BOARD_HAUPPAUGE:
 	case CX88_BOARD_HAUPPAUGE_DVB_T1:
 	case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
 	case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
 	case CX88_BOARD_HAUPPAUGE_HVR1100:
 	case CX88_BOARD_HAUPPAUGE_HVR3000:
 	case CX88_BOARD_HAUPPAUGE_HVR4000:
 	case CX88_BOARD_HAUPPAUGE_HVR4000LITE:
 	case CX88_BOARD_PCHDTV_HD3000:
 	case CX88_BOARD_PCHDTV_HD5500:
 	case CX88_BOARD_HAUPPAUGE_IRONLY:
 		ir_codes = RC_MAP_HAUPPAUGE;
 		ir->sampling = 1;
 		break;
 	case CX88_BOARD_WINFAST_DTV2000H:
 	case CX88_BOARD_WINFAST_DTV2000H_J:
 	case CX88_BOARD_WINFAST_DTV1800H:
 	case CX88_BOARD_WINFAST_DTV1800H_XC4000:
 	case CX88_BOARD_WINFAST_DTV2000H_PLUS:
 		ir_codes = RC_MAP_WINFAST;
 		ir->gpio_addr = MO_GP0_IO;
 		ir->mask_keycode = 0x8f8;
 		ir->mask_keyup = 0x100;
 		ir->polling = 50; /* ms */
 		break;
 	case CX88_BOARD_WINFAST2000XP_EXPERT:
 	case CX88_BOARD_WINFAST_DTV1000:
 	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL:
 	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F36:
 	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F43:
 		ir_codes = RC_MAP_WINFAST;
 		ir->gpio_addr = MO_GP0_IO;
 		ir->mask_keycode = 0x8f8;
 		ir->mask_keyup = 0x100;
 		ir->polling = 1; /* ms */
 		break;
 	case CX88_BOARD_IODATA_GVBCTV7E:
 		ir_codes = RC_MAP_IODATA_BCTV7E;
 		ir->gpio_addr = MO_GP0_IO;
 		ir->mask_keycode = 0xfd;
 		ir->mask_keydown = 0x02;
 		ir->polling = 5; /* ms */
 		break;
 	case CX88_BOARD_PROLINK_PLAYTVPVR:
 	case CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO:
 		/*
 		 * It seems that this hardware is paired with NEC extended
 		 * address 0x866b. So, unfortunately, its usage with other
 		 * IR's with different address won't work. Still, there are
 		 * other IR's from the same manufacturer that works, like the
 		 * 002-T mini RC, provided with newer PV hardware
 		 */
 		ir_codes = RC_MAP_PIXELVIEW_MK12;
 		ir->gpio_addr = MO_GP1_IO;
 		ir->mask_keyup = 0x80;
 		ir->polling = 10; /* ms */
 		hardware_mask = 0x3f;	/* Hardware returns only 6 bits from command part */
 		break;
 	case CX88_BOARD_PROLINK_PV_8000GT:
 	case CX88_BOARD_PROLINK_PV_GLOBAL_XTREME:
 		ir_codes = RC_MAP_PIXELVIEW_NEW;
 		ir->gpio_addr = MO_GP1_IO;
 		ir->mask_keycode = 0x3f;
 		ir->mask_keyup = 0x80;
 		ir->polling = 1; /* ms */
 		break;
 	case CX88_BOARD_KWORLD_LTV883:
 		ir_codes = RC_MAP_PIXELVIEW;
 		ir->gpio_addr = MO_GP1_IO;
 		ir->mask_keycode = 0x1f;
 		ir->mask_keyup = 0x60;
 		ir->polling = 1; /* ms */
 		break;
 	case CX88_BOARD_ADSTECH_DVB_T_PCI:
 		ir_codes = RC_MAP_ADSTECH_DVB_T_PCI;
 		ir->gpio_addr = MO_GP1_IO;
 		ir->mask_keycode = 0xbf;
 		ir->mask_keyup = 0x40;
 		ir->polling = 50; /* ms */
 		break;
 	case CX88_BOARD_MSI_TVANYWHERE_MASTER:
 		ir_codes = RC_MAP_MSI_TVANYWHERE;
 		ir->gpio_addr = MO_GP1_IO;
 		ir->mask_keycode = 0x1f;
 		ir->mask_keyup = 0x40;
 		ir->polling = 1; /* ms */
 		break;
 	case CX88_BOARD_AVERTV_303:
 	case CX88_BOARD_AVERTV_STUDIO_303:
 		ir_codes         = RC_MAP_AVERTV_303;
 		ir->gpio_addr    = MO_GP2_IO;
 		ir->mask_keycode = 0xfb;
 		ir->mask_keydown = 0x02;
 		ir->polling      = 50; /* ms */
 		break;
 	case CX88_BOARD_OMICOM_SS4_PCI:
 	case CX88_BOARD_SATTRADE_ST4200:
 	case CX88_BOARD_TBS_8920:
 	case CX88_BOARD_TBS_8910:
 	case CX88_BOARD_PROF_7300:
 	case CX88_BOARD_PROF_7301:
 	case CX88_BOARD_PROF_6200:
 		ir_codes = RC_MAP_TBS_NEC;
 		ir->sampling = 0xff00; /* address */
 		break;
 	case CX88_BOARD_TEVII_S464:
 	case CX88_BOARD_TEVII_S460:
 	case CX88_BOARD_TEVII_S420:
 		ir_codes = RC_MAP_TEVII_NEC;
 		ir->sampling = 0xff00; /* address */
 		break;
 	case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
 		ir_codes         = RC_MAP_DNTV_LIVE_DVBT_PRO;
 		ir->sampling     = 0xff00; /* address */
 		break;
 	case CX88_BOARD_NORWOOD_MICRO:
 		ir_codes         = RC_MAP_NORWOOD;
 		ir->gpio_addr    = MO_GP1_IO;
 		ir->mask_keycode = 0x0e;
 		ir->mask_keyup   = 0x80;
 		ir->polling      = 50; /* ms */
 		break;
 	case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
 		ir_codes         = RC_MAP_NPGTECH;
 		ir->gpio_addr    = MO_GP0_IO;
 		ir->mask_keycode = 0xfa;
 		ir->polling      = 50; /* ms */
 		break;
 	case CX88_BOARD_PINNACLE_PCTV_HD_800i:
 		ir_codes         = RC_MAP_PINNACLE_PCTV_HD;
 		ir->sampling     = 1;
 		break;
 	case CX88_BOARD_POWERCOLOR_REAL_ANGEL:
 		ir_codes         = RC_MAP_POWERCOLOR_REAL_ANGEL;
 		ir->gpio_addr    = MO_GP2_IO;
 		ir->mask_keycode = 0x7e;
 		ir->polling      = 100; /* ms */
 		break;
 	case CX88_BOARD_TWINHAN_VP1027_DVBS:
 		ir_codes         = RC_MAP_TWINHAN_VP1027_DVBS;
 		rc_type          = RC_BIT_NEC;
 		ir->sampling     = 0xff00; /* address */
 		break;
 	}

 	if (!ir_codes) {
 		err = -ENODEV;
 		goto err_out_free;
 	}

 	/*
 	 * The usage of mask_keycode were very convenient, due to several
 	 * reasons. Among others, the scancode tables were using the scancode
 	 * as the index elements. So, the less bits it was used, the smaller
 	 * the table were stored. After the input changes, the better is to use
 	 * the full scancodes, since it allows replacing the IR remote by
 	 * another one. Unfortunately, there are still some hardware, like
 	 * Pixelview Ultra Pro, where only part of the scancode is sent via
 	 * GPIO. So, there's no way to get the full scancode. Due to that,
 	 * hardware_mask were introduced here: it represents those hardware
 	 * that has such limits.
 	 */
 	if (hardware_mask && !ir->mask_keycode)
 		ir->mask_keycode = hardware_mask;

 	/* init input device */
 	snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)", core->board.name);
 	snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(pci));

 	dev->input_name = ir->name;
 	dev->input_phys = ir->phys;
 	dev->input_id.bustype = BUS_PCI;
 	dev->input_id.version = 1;
 	if (pci->subsystem_vendor) {
 		dev->input_id.vendor = pci->subsystem_vendor;
 		dev->input_id.product = pci->subsystem_device;
 	} else {
 		dev->input_id.vendor = pci->vendor;
 		dev->input_id.product = pci->device;
 	}
 	dev->dev.parent = &pci->dev;
 	dev->map_name = ir_codes;
 	dev->driver_name = MODULE_NAME;
 	dev->priv = core;
 	dev->open = cx88_ir_open;
 	dev->close = cx88_ir_close;
 	dev->scanmask = hardware_mask;

 	if (ir->sampling) {
 		dev->driver_type = RC_DRIVER_IR_RAW;
 		dev->timeout = 10 * 1000 * 1000; /* 10 ms */
 	} else {
 		dev->driver_type = RC_DRIVER_SCANCODE;
 		rc_set_allowed_protocols(dev, rc_type);
 	}

 	ir->core = core;
 	core->ir = ir;

 	/* all done */
 	err = rc_register_device(dev);
 	if (err)
 		goto err_out_free;

 	return 0;

 err_out_free:
 	rc_free_device(dev);
 	core->ir = NULL;
 	kfree(ir);
 	return err;
 }

 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;

 	cx88_ir_stop(core);
 	rc_unregister_device(ir->dev);
 	kfree(ir);

 	/* done */
 	core->ir = NULL;
 	return 0;
 }

 /* ---------------------------------------------------------------------- */

 void cx88_ir_irq(struct cx88_core *core)
 {
 	struct cx88_IR *ir = core->ir;
 	u32 samples;
 	unsigned todo, bits;
 	struct ir_raw_event ev;

 	if (!ir || !ir->sampling)
 		return;

 	/*
 	 * Samples are stored in a 32 bit register, oldest sample in
 	 * the msb. A set bit represents space and an unset bit
 	 * represents a pulse.
 	 */
 	samples = cx_read(MO_SAMPLE_IO);

 	if (samples == 0xff && ir->dev->idle)
 		return;

 	init_ir_raw_event(&ev);
 	for (todo = 32; todo > 0; todo -= bits) {
 		ev.pulse = samples & 0x80000000 ? false : true;
 		bits = min(todo, 32U - fls(ev.pulse ? samples : ~samples));
 		ev.duration = (bits * (NSEC_PER_SEC / 1000)) / ir_samplerate;
 		ir_raw_event_store_with_filter(ir->dev, &ev);
 		samples <<= bits;
 	}
 	ir_raw_event_handle(ir->dev);
 }

 static int get_key_pvr2000(struct IR_i2c *ir, enum rc_type *protocol,
 			   u32 *scancode, u8 *toggle)
 {
 	int flags, code;

 	/* poll IR chip */
 	flags = i2c_smbus_read_byte_data(ir->c, 0x10);
 	if (flags < 0) {
 		dprintk("read error\n");
 		return 0;
 	}
 	/* key pressed ? */
 	if (0 == (flags & 0x80))
 		return 0;

 	/* read actual key code */
 	code = i2c_smbus_read_byte_data(ir->c, 0x00);
 	if (code < 0) {
 		dprintk("read error\n");
 		return 0;
 	}

 	dprintk("IR Key/Flags: (0x%02x/0x%02x)\n",
 		   code & 0xff, flags & 0xff);

 	*protocol = RC_TYPE_UNKNOWN;
 	*scancode = code & 0xff;
 	*toggle = 0;
 	return 1;
 }

 void cx88_i2c_init_ir(struct cx88_core *core)
 {
 	struct i2c_board_info info;
 	const unsigned short default_addr_list[] = {
 		0x18, 0x6b, 0x71,
 		I2C_CLIENT_END
 	};
 	const unsigned short pvr2000_addr_list[] = {
 		0x18, 0x1a,
 		I2C_CLIENT_END
 	};
 	const unsigned short *addr_list = default_addr_list;
 	const unsigned short *addrp;
 	/* Instantiate the IR receiver device, if present */
 	if (0 != core->i2c_rc)
 		return;

 	memset(&info, 0, sizeof(struct i2c_board_info));
 	strlcpy(info.type, "ir_video", I2C_NAME_SIZE);

 	switch (core->boardnr) {
 	case CX88_BOARD_LEADTEK_PVR2000:
 		addr_list = pvr2000_addr_list;
 		core->init_data.name = "cx88 Leadtek PVR 2000 remote";
 		core->init_data.type = RC_BIT_UNKNOWN;
 		core->init_data.get_key = get_key_pvr2000;
 		core->init_data.ir_codes = RC_MAP_EMPTY;
 		break;
 	}

 	/*
 	 * We can't call i2c_new_probed_device() because it uses
 	 * quick writes for probing and at least some RC receiver
 	 * devices only reply to reads.
 	 * Also, Hauppauge XVR needs to be specified, as address 0x71
 	 * conflicts with another remote type used with saa7134
 	 */
 	for (addrp = addr_list; *addrp != I2C_CLIENT_END; addrp++) {
 		info.platform_data = NULL;
 		memset(&core->init_data, 0, sizeof(core->init_data));

 		if (*addrp == 0x71) {
 			/* Hauppauge XVR */
 			core->init_data.name = "cx88 Hauppauge XVR remote";
 			core->init_data.ir_codes = RC_MAP_HAUPPAUGE;
 			core->init_data.type = RC_BIT_RC5;
 			core->init_data.internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;

 			info.platform_data = &core->init_data;
 		}
 		if (i2c_smbus_xfer(&core->i2c_adap, *addrp, 0,
 					I2C_SMBUS_READ, 0,
 					I2C_SMBUS_QUICK, NULL) >= 0) {
 			info.addr = *addrp;
 			i2c_new_device(&core->i2c_adap, &info);
 			break;
 		}
 	}
 }

 /* ---------------------------------------------------------------------- */

 MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
 MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
 MODULE_LICENSE("GPL");
	/*
	*
	* 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, 2005 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/hrtimer.h>
	#include <linux/pci.h>
	#include <linux/slab.h>
	#include <linux/module.h>

	#include "cx88.h"
	#include <media/rc-core.h>

	#define MODULE_NAME "cx88xx"

	/* ---------------------------------------------------------------------- */

	struct cx88_IR {
	struct cx88_core *core;
	struct rc_dev *dev;

	int users;

	char name[32];
	char phys[32];

	/* sample from gpio pin 16 */
	u32 sampling;

	/* poll external decoder */
	int polling;
	struct hrtimer timer;
	u32 gpio_addr;
	u32 last_gpio;
	u32 mask_keycode;
	u32 mask_keydown;
	u32 mask_keyup;
	};

	static unsigned ir_samplerate = 4;
	module_param(ir_samplerate, uint, 0444);
	MODULE_PARM_DESC(ir_samplerate, "IR samplerate in kHz, 1 - 20, default 4");

	static int ir_debug;
	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)

	#define dprintk(fmt, arg...) if (ir_debug) \
	printk(KERN_DEBUG "cx88 IR: " fmt , ##arg)

	/* ---------------------------------------------------------------------- */

	static void cx88_ir_handle_key(struct cx88_IR *ir)
	{
	struct cx88_core *core = ir->core;
	u32 gpio, data, auxgpio;

	/* read gpio value */
	gpio = cx_read(ir->gpio_addr);
	switch (core->boardnr) {
	case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
	/* This board apparently uses a combination of 2 GPIO
	to represent the keys. Additionally, the second GPIO
	can be used for parity.

	Example:

	for key "5"
	gpio = 0x758, auxgpio = 0xe5 or 0xf5
	for key "Power"
	gpio = 0x758, auxgpio = 0xed or 0xfd
	*/

	auxgpio = cx_read(MO_GP1_IO);
	/* Take out the parity part */
	gpio=(gpio & 0x7fd) + (auxgpio & 0xef);
	break;
	case CX88_BOARD_WINFAST_DTV1000:
	case CX88_BOARD_WINFAST_DTV1800H:
	case CX88_BOARD_WINFAST_DTV1800H_XC4000:
	case CX88_BOARD_WINFAST_DTV2000H_PLUS:
	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL:
	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F36:
	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F43:
	gpio = (gpio & 0x6ff) \| ((cx_read(MO_GP1_IO) << 8) & 0x900);
	auxgpio = gpio;
	break;
	default:
	auxgpio = gpio;
	}
	if (ir->polling) {
	if (ir->last_gpio == auxgpio)
	return;
	ir->last_gpio = auxgpio;
	}

	/* 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->core->boardnr == CX88_BOARD_NORWOOD_MICRO) {
	u32 gpio_key = cx_read(MO_GP0_IO);

	data = (data << 4) \| ((gpio_key & 0xf0) >> 4);

	rc_keydown(ir->dev, data, 0);

	} else if (ir->mask_keydown) {
	/* bit set on keydown */
	if (gpio & ir->mask_keydown)
	rc_keydown_notimeout(ir->dev, data, 0);
	else
	rc_keyup(ir->dev);

	} else if (ir->mask_keyup) {
	/* bit cleared on keydown */
	if (0 == (gpio & ir->mask_keyup))
	rc_keydown_notimeout(ir->dev, data, 0);
	else
	rc_keyup(ir->dev);

	} else {
	/* can't distinguish keydown/up :-/ */
	rc_keydown_notimeout(ir->dev, data, 0);
	rc_keyup(ir->dev);
	}
	}

	static enum hrtimer_restart cx88_ir_work(struct hrtimer *timer)
	{
	unsigned long missed;
	struct cx88_IR *ir = container_of(timer, struct cx88_IR, timer);

	cx88_ir_handle_key(ir);
	missed = hrtimer_forward_now(&ir->timer,
	ktime_set(0, ir->polling * 1000000));
	if (missed > 1)
	ir_dprintk("Missed ticks %ld\n", missed - 1);

	return HRTIMER_RESTART;
	}

	static int __cx88_ir_start(void *priv)
	{
	struct cx88_core *core = priv;
	struct cx88_IR *ir;

	if (!core \|\| !core->ir)
	return -EINVAL;

	ir = core->ir;

	if (ir->polling) {
	hrtimer_init(&ir->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	ir->timer.function = cx88_ir_work;
	hrtimer_start(&ir->timer,
	ktime_set(0, ir->polling * 1000000),
	HRTIMER_MODE_REL);
	}
	if (ir->sampling) {
	core->pci_irqmask \|= PCI_INT_IR_SMPINT;
	cx_write(MO_DDS_IO, 0x33F286 * ir_samplerate); /* samplerate */
	cx_write(MO_DDSCFG_IO, 0x5); /* enable */
	}
	return 0;
	}

	static void __cx88_ir_stop(void *priv)
	{
	struct cx88_core *core = priv;
	struct cx88_IR *ir;

	if (!core \|\| !core->ir)
	return;

	ir = core->ir;
	if (ir->sampling) {
	cx_write(MO_DDSCFG_IO, 0x0);
	core->pci_irqmask &= ~PCI_INT_IR_SMPINT;
	}

	if (ir->polling)
	hrtimer_cancel(&ir->timer);
	}

	int cx88_ir_start(struct cx88_core *core)
	{
	if (core->ir->users)
	return __cx88_ir_start(core);

	return 0;
	}

	void cx88_ir_stop(struct cx88_core *core)
	{
	if (core->ir->users)
	__cx88_ir_stop(core);
	}

	static int cx88_ir_open(struct rc_dev *rc)
	{
	struct cx88_core *core = rc->priv;

	core->ir->users++;
	return __cx88_ir_start(core);
	}

	static void cx88_ir_close(struct rc_dev *rc)
	{
	struct cx88_core *core = rc->priv;

	core->ir->users--;
	if (!core->ir->users)
	__cx88_ir_stop(core);
	}

	/* ---------------------------------------------------------------------- */

	int cx88_ir_init(struct cx88_core core, struct pci_dev pci)
	{
	struct cx88_IR *ir;
	struct rc_dev *dev;
	char *ir_codes = NULL;
	u64 rc_type = RC_BIT_OTHER;
	int err = -ENOMEM;
	u32 hardware_mask = 0; /* For devices with a hardware mask, when
	* used with a full-code IR table
	*/

	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
	dev = rc_allocate_device();
	if (!ir \|\| !dev)
	goto err_out_free;

	ir->dev = dev;

	/* detect & configure */
	switch (core->boardnr) {
	case CX88_BOARD_DNTV_LIVE_DVB_T:
	case CX88_BOARD_KWORLD_DVB_T:
	case CX88_BOARD_KWORLD_DVB_T_CX22702:
	ir_codes = RC_MAP_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_TERRATEC_CINERGY_1400_DVB_T1:
	ir_codes = RC_MAP_CINERGY_1400;
	ir->sampling = 0xeb04; /* address */
	break;
	case CX88_BOARD_HAUPPAUGE:
	case CX88_BOARD_HAUPPAUGE_DVB_T1:
	case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
	case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
	case CX88_BOARD_HAUPPAUGE_HVR1100:
	case CX88_BOARD_HAUPPAUGE_HVR3000:
	case CX88_BOARD_HAUPPAUGE_HVR4000:
	case CX88_BOARD_HAUPPAUGE_HVR4000LITE:
	case CX88_BOARD_PCHDTV_HD3000:
	case CX88_BOARD_PCHDTV_HD5500:
	case CX88_BOARD_HAUPPAUGE_IRONLY:
	ir_codes = RC_MAP_HAUPPAUGE;
	ir->sampling = 1;
	break;
	case CX88_BOARD_WINFAST_DTV2000H:
	case CX88_BOARD_WINFAST_DTV2000H_J:
	case CX88_BOARD_WINFAST_DTV1800H:
	case CX88_BOARD_WINFAST_DTV1800H_XC4000:
	case CX88_BOARD_WINFAST_DTV2000H_PLUS:
	ir_codes = RC_MAP_WINFAST;
	ir->gpio_addr = MO_GP0_IO;
	ir->mask_keycode = 0x8f8;
	ir->mask_keyup = 0x100;
	ir->polling = 50; /* ms */
	break;
	case CX88_BOARD_WINFAST2000XP_EXPERT:
	case CX88_BOARD_WINFAST_DTV1000:
	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL:
	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F36:
	case CX88_BOARD_WINFAST_TV2000_XP_GLOBAL_6F43:
	ir_codes = RC_MAP_WINFAST;
	ir->gpio_addr = MO_GP0_IO;
	ir->mask_keycode = 0x8f8;
	ir->mask_keyup = 0x100;
	ir->polling = 1; /* ms */
	break;
	case CX88_BOARD_IODATA_GVBCTV7E:
	ir_codes = RC_MAP_IODATA_BCTV7E;
	ir->gpio_addr = MO_GP0_IO;
	ir->mask_keycode = 0xfd;
	ir->mask_keydown = 0x02;
	ir->polling = 5; /* ms */
	break;
	case CX88_BOARD_PROLINK_PLAYTVPVR:
	case CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO:
	/*
	* It seems that this hardware is paired with NEC extended
	* address 0x866b. So, unfortunately, its usage with other
	* IR's with different address won't work. Still, there are
	* other IR's from the same manufacturer that works, like the
	* 002-T mini RC, provided with newer PV hardware
	*/
	ir_codes = RC_MAP_PIXELVIEW_MK12;
	ir->gpio_addr = MO_GP1_IO;
	ir->mask_keyup = 0x80;
	ir->polling = 10; /* ms */
	hardware_mask = 0x3f; /* Hardware returns only 6 bits from command part */
	break;
	case CX88_BOARD_PROLINK_PV_8000GT:
	case CX88_BOARD_PROLINK_PV_GLOBAL_XTREME:
	ir_codes = RC_MAP_PIXELVIEW_NEW;
	ir->gpio_addr = MO_GP1_IO;
	ir->mask_keycode = 0x3f;
	ir->mask_keyup = 0x80;
	ir->polling = 1; /* ms */
	break;
	case CX88_BOARD_KWORLD_LTV883:
	ir_codes = RC_MAP_PIXELVIEW;
	ir->gpio_addr = MO_GP1_IO;
	ir->mask_keycode = 0x1f;
	ir->mask_keyup = 0x60;
	ir->polling = 1; /* ms */
	break;
	case CX88_BOARD_ADSTECH_DVB_T_PCI:
	ir_codes = RC_MAP_ADSTECH_DVB_T_PCI;
	ir->gpio_addr = MO_GP1_IO;
	ir->mask_keycode = 0xbf;
	ir->mask_keyup = 0x40;
	ir->polling = 50; /* ms */
	break;
	case CX88_BOARD_MSI_TVANYWHERE_MASTER:
	ir_codes = RC_MAP_MSI_TVANYWHERE;
	ir->gpio_addr = MO_GP1_IO;
	ir->mask_keycode = 0x1f;
	ir->mask_keyup = 0x40;
	ir->polling = 1; /* ms */
	break;
	case CX88_BOARD_AVERTV_303:
	case CX88_BOARD_AVERTV_STUDIO_303:
	ir_codes = RC_MAP_AVERTV_303;
	ir->gpio_addr = MO_GP2_IO;
	ir->mask_keycode = 0xfb;
	ir->mask_keydown = 0x02;
	ir->polling = 50; /* ms */
	break;
	case CX88_BOARD_OMICOM_SS4_PCI:
	case CX88_BOARD_SATTRADE_ST4200:
	case CX88_BOARD_TBS_8920:
	case CX88_BOARD_TBS_8910:
	case CX88_BOARD_PROF_7300:
	case CX88_BOARD_PROF_7301:
	case CX88_BOARD_PROF_6200:
	ir_codes = RC_MAP_TBS_NEC;
	ir->sampling = 0xff00; /* address */
	break;
	case CX88_BOARD_TEVII_S464:
	case CX88_BOARD_TEVII_S460:
	case CX88_BOARD_TEVII_S420:
	ir_codes = RC_MAP_TEVII_NEC;
	ir->sampling = 0xff00; /* address */
	break;
	case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
	ir_codes = RC_MAP_DNTV_LIVE_DVBT_PRO;
	ir->sampling = 0xff00; /* address */
	break;
	case CX88_BOARD_NORWOOD_MICRO:
	ir_codes = RC_MAP_NORWOOD;
	ir->gpio_addr = MO_GP1_IO;
	ir->mask_keycode = 0x0e;
	ir->mask_keyup = 0x80;
	ir->polling = 50; /* ms */
	break;
	case CX88_BOARD_NPGTECH_REALTV_TOP10FM:
	ir_codes = RC_MAP_NPGTECH;
	ir->gpio_addr = MO_GP0_IO;
	ir->mask_keycode = 0xfa;
	ir->polling = 50; /* ms */
	break;
	case CX88_BOARD_PINNACLE_PCTV_HD_800i:
	ir_codes = RC_MAP_PINNACLE_PCTV_HD;
	ir->sampling = 1;
	break;
	case CX88_BOARD_POWERCOLOR_REAL_ANGEL:
	ir_codes = RC_MAP_POWERCOLOR_REAL_ANGEL;
	ir->gpio_addr = MO_GP2_IO;
	ir->mask_keycode = 0x7e;
	ir->polling = 100; /* ms */
	break;
	case CX88_BOARD_TWINHAN_VP1027_DVBS:
	ir_codes = RC_MAP_TWINHAN_VP1027_DVBS;
	rc_type = RC_BIT_NEC;
	ir->sampling = 0xff00; /* address */
	break;
	}

	if (!ir_codes) {
	err = -ENODEV;
	goto err_out_free;
	}

	/*
	* The usage of mask_keycode were very convenient, due to several
	* reasons. Among others, the scancode tables were using the scancode
	* as the index elements. So, the less bits it was used, the smaller
	* the table were stored. After the input changes, the better is to use
	* the full scancodes, since it allows replacing the IR remote by
	* another one. Unfortunately, there are still some hardware, like
	* Pixelview Ultra Pro, where only part of the scancode is sent via
	* GPIO. So, there's no way to get the full scancode. Due to that,
	* hardware_mask were introduced here: it represents those hardware
	* that has such limits.
	*/
	if (hardware_mask && !ir->mask_keycode)
	ir->mask_keycode = hardware_mask;

	/* init input device */
	snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)", core->board.name);
	snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(pci));

	dev->input_name = ir->name;
	dev->input_phys = ir->phys;
	dev->input_id.bustype = BUS_PCI;
	dev->input_id.version = 1;
	if (pci->subsystem_vendor) {
	dev->input_id.vendor = pci->subsystem_vendor;
	dev->input_id.product = pci->subsystem_device;
	} else {
	dev->input_id.vendor = pci->vendor;
	dev->input_id.product = pci->device;
	}
	dev->dev.parent = &pci->dev;
	dev->map_name = ir_codes;
	dev->driver_name = MODULE_NAME;
	dev->priv = core;
	dev->open = cx88_ir_open;
	dev->close = cx88_ir_close;
	dev->scanmask = hardware_mask;

	if (ir->sampling) {
	dev->driver_type = RC_DRIVER_IR_RAW;
	dev->timeout = 10 * 1000 * 1000; /* 10 ms */
	} else {
	dev->driver_type = RC_DRIVER_SCANCODE;
	rc_set_allowed_protocols(dev, rc_type);
	}

	ir->core = core;
	core->ir = ir;

	/* all done */
	err = rc_register_device(dev);
	if (err)
	goto err_out_free;

	return 0;

	err_out_free:
	rc_free_device(dev);
	core->ir = NULL;
	kfree(ir);
	return err;
	}

	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;

	cx88_ir_stop(core);
	rc_unregister_device(ir->dev);
	kfree(ir);

	/* done */
	core->ir = NULL;
	return 0;
	}

	/* ---------------------------------------------------------------------- */

	void cx88_ir_irq(struct cx88_core *core)
	{
	struct cx88_IR *ir = core->ir;
	u32 samples;
	unsigned todo, bits;
	struct ir_raw_event ev;

	if (!ir \|\| !ir->sampling)
	return;

	/*
	* Samples are stored in a 32 bit register, oldest sample in
	* the msb. A set bit represents space and an unset bit
	* represents a pulse.
	*/
	samples = cx_read(MO_SAMPLE_IO);

	if (samples == 0xff && ir->dev->idle)
	return;

	init_ir_raw_event(&ev);
	for (todo = 32; todo > 0; todo -= bits) {
	ev.pulse = samples & 0x80000000 ? false : true;
	bits = min(todo, 32U - fls(ev.pulse ? samples : ~samples));
	ev.duration = (bits * (NSEC_PER_SEC / 1000)) / ir_samplerate;
	ir_raw_event_store_with_filter(ir->dev, &ev);
	samples <<= bits;
	}
	ir_raw_event_handle(ir->dev);
	}

	static int get_key_pvr2000(struct IR_i2c ir, enum rc_type protocol,
	u32 scancode, u8 toggle)
	{
	int flags, code;

	/* poll IR chip */
	flags = i2c_smbus_read_byte_data(ir->c, 0x10);
	if (flags < 0) {
	dprintk("read error\n");
	return 0;
	}
	/* key pressed ? */
	if (0 == (flags & 0x80))
	return 0;

	/* read actual key code */
	code = i2c_smbus_read_byte_data(ir->c, 0x00);
	if (code < 0) {
	dprintk("read error\n");
	return 0;
	}

	dprintk("IR Key/Flags: (0x%02x/0x%02x)\n",
	code & 0xff, flags & 0xff);

	*protocol = RC_TYPE_UNKNOWN;
	*scancode = code & 0xff;
	*toggle = 0;
	return 1;
	}

	void cx88_i2c_init_ir(struct cx88_core *core)
	{
	struct i2c_board_info info;
	const unsigned short default_addr_list[] = {
	0x18, 0x6b, 0x71,
	I2C_CLIENT_END
	};
	const unsigned short pvr2000_addr_list[] = {
	0x18, 0x1a,
	I2C_CLIENT_END
	};
	const unsigned short *addr_list = default_addr_list;
	const unsigned short *addrp;
	/* Instantiate the IR receiver device, if present */
	if (0 != core->i2c_rc)
	return;

	memset(&info, 0, sizeof(struct i2c_board_info));
	strlcpy(info.type, "ir_video", I2C_NAME_SIZE);

	switch (core->boardnr) {
	case CX88_BOARD_LEADTEK_PVR2000:
	addr_list = pvr2000_addr_list;
	core->init_data.name = "cx88 Leadtek PVR 2000 remote";
	core->init_data.type = RC_BIT_UNKNOWN;
	core->init_data.get_key = get_key_pvr2000;
	core->init_data.ir_codes = RC_MAP_EMPTY;
	break;
	}

	/*
	* We can't call i2c_new_probed_device() because it uses
	* quick writes for probing and at least some RC receiver
	* devices only reply to reads.
	* Also, Hauppauge XVR needs to be specified, as address 0x71
	* conflicts with another remote type used with saa7134
	*/
	for (addrp = addr_list; *addrp != I2C_CLIENT_END; addrp++) {
	info.platform_data = NULL;
	memset(&core->init_data, 0, sizeof(core->init_data));

	if (*addrp == 0x71) {
	/* Hauppauge XVR */
	core->init_data.name = "cx88 Hauppauge XVR remote";
	core->init_data.ir_codes = RC_MAP_HAUPPAUGE;
	core->init_data.type = RC_BIT_RC5;
	core->init_data.internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;

	info.platform_data = &core->init_data;
	}
	if (i2c_smbus_xfer(&core->i2c_adap, *addrp, 0,
	I2C_SMBUS_READ, 0,
	I2C_SMBUS_QUICK, NULL) >= 0) {
	info.addr = *addrp;
	i2c_new_device(&core->i2c_adap, &info);
	break;
	}
	}
	}

	/* ---------------------------------------------------------------------- */

	MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
	MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
	MODULE_LICENSE("GPL");