From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/media/i2c/ir-kbd-i2c.c | 497 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 497 insertions(+) create mode 100644 drivers/media/i2c/ir-kbd-i2c.c (limited to 'drivers/media/i2c/ir-kbd-i2c.c') diff --git a/drivers/media/i2c/ir-kbd-i2c.c b/drivers/media/i2c/ir-kbd-i2c.c new file mode 100644 index 000000000..175a76114 --- /dev/null +++ b/drivers/media/i2c/ir-kbd-i2c.c @@ -0,0 +1,497 @@ +/* + * + * keyboard input driver for i2c IR remote controls + * + * Copyright (c) 2000-2003 Gerd Knorr + * modified for PixelView (BT878P+W/FM) by + * Michal Kochanowicz + * Christoph Bartelmus + * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by + * Ulrich Mueller + * modified for em2820 based USB TV tuners by + * Markus Rechberger + * modified for DViCO Fusion HDTV 5 RT GOLD by + * Chaogui Zhang + * modified for MSI TV@nywhere Plus by + * Henry Wong + * Mark Schultz + * Brian Rogers + * modified for AVerMedia Cardbus by + * Oldrich Jedlicka + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +/* ----------------------------------------------------------------------- */ +/* 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, enum rc_type *protocol, + u32 *scancode, u8 *ptoggle, 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; + + /* filter out invalid key presses */ + ircode = (start << 12) | (toggle << 11) | (dev << 6) | code; + if ((ircode & 0x1fff) == 0x1fff) + 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); + + *protocol = RC_TYPE_RC5; + *scancode = RC_SCANCODE_RC5(dev, code); + *ptoggle = toggle; + return 1; +} + +static int get_key_haup(struct IR_i2c *ir, enum rc_type *protocol, + u32 *scancode, u8 *toggle) +{ + return get_key_haup_common (ir, protocol, scancode, toggle, 3, 0); +} + +static int get_key_haup_xvr(struct IR_i2c *ir, enum rc_type *protocol, + u32 *scancode, u8 *toggle) +{ + 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, protocol, scancode, toggle, 6, 3); +} + +static int get_key_pixelview(struct IR_i2c *ir, enum rc_type *protocol, + u32 *scancode, u8 *toggle) +{ + unsigned char b; + + /* poll IR chip */ + if (1 != i2c_master_recv(ir->c, &b, 1)) { + dprintk(1,"read error\n"); + return -EIO; + } + + *protocol = RC_TYPE_OTHER; + *scancode = b; + *toggle = 0; + return 1; +} + +static int get_key_fusionhdtv(struct IR_i2c *ir, enum rc_type *protocol, + u32 *scancode, u8 *toggle) +{ + 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; + + *protocol = RC_TYPE_UNKNOWN; + *scancode = buf[2]; + *toggle = 0; + return 1; +} + +static int get_key_knc1(struct IR_i2c *ir, enum rc_type *protocol, + u32 *scancode, u8 *toggle) +{ + 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; + + *protocol = RC_TYPE_UNKNOWN; + *scancode = b; + *toggle = 0; + return 1; +} + +static int get_key_avermedia_cardbus(struct IR_i2c *ir, enum rc_type *protocol, + u32 *scancode, u8 *toggle) +{ + 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 > 4) { + /* Only a warning */ + dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n", + keygroup, key); + } + key |= (keygroup & 1) << 6; + + *protocol = RC_TYPE_UNKNOWN; + *scancode = key; + if (ir->c->addr == 0x41) /* AVerMedia EM78P153 */ + *scancode |= keygroup << 8; + *toggle = 0; + return 1; +} + +/* ----------------------------------------------------------------------- */ + +static int ir_key_poll(struct IR_i2c *ir) +{ + enum rc_type protocol; + u32 scancode; + u8 toggle; + int rc; + + dprintk(3, "%s\n", __func__); + rc = ir->get_key(ir, &protocol, &scancode, &toggle); + if (rc < 0) { + dprintk(2,"error\n"); + return rc; + } + + if (rc) { + dprintk(1, "%s: proto = 0x%04x, scancode = 0x%08x\n", + __func__, protocol, scancode); + rc_keydown(ir->rc, protocol, scancode, toggle); + } + 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_BIT_UNKNOWN; + struct IR_i2c *ir; + struct rc_dev *rc = NULL; + struct i2c_adapter *adap = client->adapter; + unsigned short addr = client->addr; + int err; + + ir = devm_kzalloc(&client->dev, sizeof(*ir), 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_BIT_OTHER; + ir_codes = RC_MAP_EMPTY; + break; + case 0x18: + case 0x1f: + case 0x1a: + name = "Hauppauge"; + ir->get_key = get_key_haup; + rc_type = RC_BIT_RC5; + ir_codes = RC_MAP_HAUPPAUGE; + break; + case 0x30: + name = "KNC One"; + ir->get_key = get_key_knc1; + rc_type = RC_BIT_OTHER; + ir_codes = RC_MAP_EMPTY; + break; + case 0x6b: + name = "FusionHDTV"; + ir->get_key = get_key_fusionhdtv; + rc_type = RC_BIT_UNKNOWN; + ir_codes = RC_MAP_FUSIONHDTV_MCE; + break; + case 0x40: + name = "AVerMedia Cardbus remote"; + ir->get_key = get_key_avermedia_cardbus; + rc_type = RC_BIT_OTHER; + ir_codes = RC_MAP_AVERMEDIA_CARDBUS; + break; + case 0x41: + name = "AVerMedia EM78P153"; + ir->get_key = get_key_avermedia_cardbus; + rc_type = RC_BIT_OTHER; + /* RM-KV remote, seems to be same as RM-K6 */ + ir_codes = RC_MAP_AVERMEDIA_M733A_RM_K6; + break; + case 0x71: + name = "Hauppauge/Zilog Z8"; + ir->get_key = get_key_haup_xvr; + rc_type = RC_BIT_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, initialize it + * internally + */ + rc = rc_allocate_device(); + if (!rc) + return -ENOMEM; + } + 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_protocols = rc_type; + rc->enabled_protocols = 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); + 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 */ + rc_unregister_device(ir->rc); + + /* free memory */ + 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"); -- cgit v1.2.3-54-g00ecf