diff options
Diffstat (limited to 'drivers/media/video/ir-kbd-i2c.c')
-rw-r--r-- | drivers/media/video/ir-kbd-i2c.c | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/drivers/media/video/ir-kbd-i2c.c b/drivers/media/video/ir-kbd-i2c.c new file mode 100644 index 0000000..efe8499 --- /dev/null +++ b/drivers/media/video/ir-kbd-i2c.c @@ -0,0 +1,555 @@ +/* + * + * 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> + * + * 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/i2c-id.h> +#include <linux/workqueue.h> + +#include <media/ir-common.h> +#include <media/ir-kbd-i2c.h> + +/* ----------------------------------------------------------------------- */ +/* insmod parameters */ + +static int debug; +module_param(debug, int, 0644); /* debug level (0,1,2) */ + +static int hauppauge; +module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */ +MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)"); + + +#define DEVNAME "ir-kbd-i2c" +#define dprintk(level, fmt, arg...) if (debug >= level) \ + printk(KERN_DEBUG DEVNAME ": " 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 (dev!=0x1e && dev!=0x1f) + /* not a hauppauge remote */ + 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 = code; + *ir_raw = ircode; + return 1; +} + +static inline 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 inline int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) +{ + 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_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(1,"read error\n"); + return -EIO; + } + + /* ignore 0xaa */ + if (b==0xaa) + return 0; + dprintk(2,"key %02x\n", b); + + *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 void ir_key_poll(struct IR_i2c *ir) +{ + static u32 ir_key, ir_raw; + int rc; + + dprintk(2,"ir_poll_key\n"); + rc = ir->get_key(ir, &ir_key, &ir_raw); + if (rc < 0) { + dprintk(2,"error\n"); + return; + } + + if (0 == rc) { + ir_input_nokey(ir->input, &ir->ir); + } else { + ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw); + } +} + +static void ir_timer(unsigned long data) +{ + struct IR_i2c *ir = (struct IR_i2c*)data; + schedule_work(&ir->work); +} + +static void ir_work(struct work_struct *work) +{ + struct IR_i2c *ir = container_of(work, struct IR_i2c, work); + int polling_interval = 100; + + /* MSI TV@nywhere Plus requires more frequent polling + otherwise it will miss some keypresses */ + if (ir->c.adapter->id == I2C_HW_SAA7134 && ir->c.addr == 0x30) + polling_interval = 50; + + ir_key_poll(ir); + mod_timer(&ir->timer, jiffies + msecs_to_jiffies(polling_interval)); +} + +/* ----------------------------------------------------------------------- */ + +static int ir_attach(struct i2c_adapter *adap, int addr, + unsigned short flags, int kind); +static int ir_detach(struct i2c_client *client); +static int ir_probe(struct i2c_adapter *adap); + +static struct i2c_driver driver = { + .driver = { + .name = "ir-kbd-i2c", + }, + .id = I2C_DRIVERID_INFRARED, + .attach_adapter = ir_probe, + .detach_client = ir_detach, +}; + +static struct i2c_client client_template = +{ + .name = "unset", + .driver = &driver +}; + +static int ir_attach(struct i2c_adapter *adap, int addr, + unsigned short flags, int kind) +{ + IR_KEYTAB_TYPE *ir_codes = NULL; + char *name; + int ir_type; + struct IR_i2c *ir; + struct input_dev *input_dev; + int err; + + ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL); + input_dev = input_allocate_device(); + if (!ir || !input_dev) { + err = -ENOMEM; + goto err_out_free; + } + + ir->c = client_template; + ir->input = input_dev; + + ir->c.adapter = adap; + ir->c.addr = addr; + + i2c_set_clientdata(&ir->c, ir); + + switch(addr) { + case 0x64: + name = "Pixelview"; + ir->get_key = get_key_pixelview; + ir_type = IR_TYPE_OTHER; + ir_codes = ir_codes_empty; + break; + case 0x4b: + name = "PV951"; + ir->get_key = get_key_pv951; + ir_type = IR_TYPE_OTHER; + ir_codes = ir_codes_pv951; + break; + case 0x18: + case 0x1a: + name = "Hauppauge"; + ir->get_key = get_key_haup; + ir_type = IR_TYPE_RC5; + if (hauppauge == 1) { + ir_codes = ir_codes_hauppauge_new; + } else { + ir_codes = ir_codes_rc5_tv; + } + break; + case 0x30: + name = "KNC One"; + ir->get_key = get_key_knc1; + ir_type = IR_TYPE_OTHER; + ir_codes = ir_codes_empty; + break; + case 0x6b: + name = "FusionHDTV"; + ir->get_key = get_key_fusionhdtv; + ir_type = IR_TYPE_RC5; + ir_codes = ir_codes_fusionhdtv_mce; + break; + case 0x7a: + case 0x47: + case 0x71: + case 0x2d: + if (adap->id == I2C_HW_B_CX2388x) { + /* Handled by cx88-input */ + name = "CX2388x remote"; + ir_type = IR_TYPE_RC5; + ir->get_key = get_key_haup_xvr; + if (hauppauge == 1) { + ir_codes = ir_codes_hauppauge_new; + } else { + ir_codes = ir_codes_rc5_tv; + } + } else { + /* Handled by saa7134-input */ + name = "SAA713x remote"; + ir_type = IR_TYPE_OTHER; + } + break; + default: + /* shouldn't happen */ + printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n", addr); + err = -ENODEV; + goto err_out_free; + } + + /* Sets name */ + snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name); + ir->ir_codes = ir_codes; + + /* register i2c device + * At device register, IR codes may be changed to be + * board dependent. + */ + err = i2c_attach_client(&ir->c); + if (err) + goto err_out_free; + + /* If IR not supported or disabled, unregisters driver */ + if (ir->get_key == NULL) { + err = -ENODEV; + goto err_out_detach; + } + + /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */ + snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0", + ir->c.adapter->dev.bus_id, + ir->c.dev.bus_id); + + /* init + register input device */ + ir_input_init(input_dev, &ir->ir, ir_type, ir->ir_codes); + input_dev->id.bustype = BUS_I2C; + input_dev->name = ir->c.name; + input_dev->phys = ir->phys; + + err = input_register_device(ir->input); + if (err) + goto err_out_detach; + + printk(DEVNAME ": %s detected at %s [%s]\n", + ir->input->name, ir->input->phys, adap->name); + + /* start polling via eventd */ + INIT_WORK(&ir->work, ir_work); + init_timer(&ir->timer); + ir->timer.function = ir_timer; + ir->timer.data = (unsigned long)ir; + schedule_work(&ir->work); + + return 0; + + err_out_detach: + i2c_detach_client(&ir->c); + err_out_free: + input_free_device(input_dev); + kfree(ir); + return err; +} + +static int ir_detach(struct i2c_client *client) +{ + struct IR_i2c *ir = i2c_get_clientdata(client); + + /* kill outstanding polls */ + del_timer_sync(&ir->timer); + flush_scheduled_work(); + + /* unregister devices */ + input_unregister_device(ir->input); + i2c_detach_client(&ir->c); + + /* free memory */ + kfree(ir); + return 0; +} + +static int ir_probe(struct i2c_adapter *adap) +{ + + /* 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 + */ + + static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1}; + static const int probe_saa7134[] = { 0x7a, 0x47, 0x71, 0x2d, -1 }; + static const int probe_em28XX[] = { 0x30, 0x47, -1 }; + static const int probe_cx88[] = { 0x18, 0x6b, 0x71, -1 }; + static const int probe_cx23885[] = { 0x6b, -1 }; + const int *probe; + struct i2c_msg msg = { + .flags = I2C_M_RD, + .len = 0, + .buf = NULL, + }; + int i, rc; + + switch (adap->id) { + case I2C_HW_B_BT848: + probe = probe_bttv; + break; + case I2C_HW_B_CX2341X: + probe = probe_bttv; + break; + case I2C_HW_SAA7134: + probe = probe_saa7134; + break; + case I2C_HW_B_EM28XX: + probe = probe_em28XX; + break; + case I2C_HW_B_CX2388x: + probe = probe_cx88; + break; + case I2C_HW_B_CX23885: + probe = probe_cx23885; + break; + default: + return 0; + } + + for (i = 0; -1 != probe[i]; i++) { + msg.addr = probe[i]; + rc = i2c_transfer(adap, &msg, 1); + dprintk(1,"probe 0x%02x @ %s: %s\n", + probe[i], adap->name, + (1 == rc) ? "yes" : "no"); + if (1 == rc) { + ir_attach(adap, probe[i], 0, 0); + return 0; + } + } + + /* Special case for MSI TV@nywhere Plus remote */ + if (adap->id == I2C_HW_SAA7134) { + u8 temp; + + /* MSI TV@nywhere Plus controller doesn't seem to + respond to probes unless we read something from + an existing device. Weird... */ + + msg.addr = 0x50; + rc = i2c_transfer(adap, &msg, 1); + dprintk(1, "probe 0x%02x @ %s: %s\n", + msg.addr, adap->name, + (1 == rc) ? "yes" : "no"); + + /* Now do the probe. The controller does not respond + to 0-byte reads, so we use a 1-byte read instead. */ + msg.addr = 0x30; + msg.len = 1; + msg.buf = &temp; + rc = i2c_transfer(adap, &msg, 1); + dprintk(1, "probe 0x%02x @ %s: %s\n", + msg.addr, adap->name, + (1 == rc) ? "yes" : "no"); + if (1 == rc) + ir_attach(adap, msg.addr, 0, 0); + } + + return 0; +} + +/* ----------------------------------------------------------------------- */ + +MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller"); +MODULE_DESCRIPTION("input driver for i2c IR remote controls"); +MODULE_LICENSE("GPL"); + +static int __init ir_init(void) +{ + return i2c_add_driver(&driver); +} + +static void __exit ir_fini(void) +{ + i2c_del_driver(&driver); +} + +module_init(ir_init); +module_exit(ir_fini); + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * --------------------------------------------------------------------------- + * Local variables: + * c-basic-offset: 8 + * End: + */ |