| /* |
| * |
| * 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> |
| * modified for em2820 based USB TV tuners by |
| * Markus Rechberger <mrechberger@gmail.com> |
| * modified for DViCO Fusion HDTV 5 RT GOLD by |
| * Chaogui Zhang <czhang1974@gmail.com> |
| * modified for MSI TV@nywhere Plus by |
| * Henry Wong <henry@stuffedcow.net> |
| * Mark Schultz <n9xmj@yahoo.com> |
| * Brian Rogers <brian_rogers@comcast.net> |
| * modified for AVerMedia Cardbus by |
| * Oldrich Jedlicka <oldium.pro@seznam.cz> |
| * |
| * 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/init.h> |
| #include <linux/kernel.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 <media/rc-core.h> |
| #include <media/ir-kbd-i2c.h> |
| |
| /* ----------------------------------------------------------------------- */ |
| /* 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, u32 *ir_key, u32 *ir_raw, |
| 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; |
| /* |
| * Hauppauge remotes (black/silver) always use |
| * specific device ids. If we do not filter the |
| * device ids then messages destined for devices |
| * such as TVs (id=0) will get through causing |
| * mis-fired events. |
| * |
| * We also filter out invalid key presses which |
| * produce annoying debug log entries. |
| */ |
| ircode= (start << 12) | (toggle << 11) | (dev << 6) | code; |
| if ((ircode & 0x1fff)==0x1fff) |
| /* invalid key press */ |
| 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); |
| |
| /* return key */ |
| *ir_key = (dev << 8) | code; |
| *ir_raw = ircode; |
| return 1; |
| } |
| |
| static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
| { |
| return get_key_haup_common (ir, ir_key, ir_raw, 3, 0); |
| } |
| |
| static int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
| { |
| 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, ir_key, ir_raw, 6, 3); |
| } |
| |
| static int get_key_pixelview(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(1,"read error\n"); |
| return -EIO; |
| } |
| *ir_key = b; |
| *ir_raw = b; |
| return 1; |
| } |
| |
| static int get_key_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
| { |
| 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; |
| |
| *ir_key = buf[2]; |
| *ir_raw = (buf[2] << 8) | buf[3]; |
| |
| return 1; |
| } |
| |
| static int get_key_knc1(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(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_avermedia_cardbus(struct IR_i2c *ir, |
| u32 *ir_key, u32 *ir_raw) |
| { |
| 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; |
| |
| *ir_key = key; |
| *ir_raw = key; |
| if (!strcmp(ir->ir_codes, RC_MAP_AVERMEDIA_M733A_RM_K6)) { |
| *ir_key |= keygroup << 8; |
| *ir_raw |= keygroup << 8; |
| } |
| return 1; |
| } |
| |
| /* ----------------------------------------------------------------------- */ |
| |
| static int ir_key_poll(struct IR_i2c *ir) |
| { |
| static u32 ir_key, ir_raw; |
| int rc; |
| |
| dprintk(3, "%s\n", __func__); |
| rc = ir->get_key(ir, &ir_key, &ir_raw); |
| if (rc < 0) { |
| dprintk(2,"error\n"); |
| return rc; |
| } |
| |
| if (rc) { |
| dprintk(1, "%s: keycode = 0x%04x\n", __func__, ir_key); |
| rc_keydown(ir->rc, ir_key, 0); |
| } |
| 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 = kzalloc(sizeof(struct IR_i2c), 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_RC5; |
| 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, initilize it |
| * internally |
| */ |
| rc = rc_allocate_device(); |
| if (!rc) { |
| err = -ENOMEM; |
| goto err_out_free; |
| } |
| } |
| 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_protos = 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); |
| kfree(ir); |
| 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 */ |
| if (ir->rc) |
| rc_unregister_device(ir->rc); |
| |
| /* free memory */ |
| kfree(ir); |
| 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"); |