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author | Hans Verkuil <hverkuil@xs4all.nl> | 2008-04-29 01:24:33 +0200 |
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committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-04-29 23:41:41 +0200 |
commit | 1c1e45d17b663d4749af456ab7c2fc1f36405ef8 (patch) | |
tree | 03704d6fd888c4c617baa81a60df0d80815b2607 /drivers/media/video/cx18/cx18-gpio.c | |
parent | V4L/DVB (7783): drivers/media/dvb/frontends/s5h1420.c: printk fix (diff) | |
download | linux-1c1e45d17b663d4749af456ab7c2fc1f36405ef8.tar.xz linux-1c1e45d17b663d4749af456ab7c2fc1f36405ef8.zip |
V4L/DVB (7786): cx18: new driver for the Conexant CX23418 MPEG encoder chip
Many thanks to Steve Toth from Hauppauge and Nattu Dakshinamurthy from
Conexant for their support. I am in particular thankful to Hauppauge
since without their help this driver would not exist. It should also
be noted that Steve did the work to get the DVB part up and running.
Thank you!
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: G. Andrew Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/cx18/cx18-gpio.c')
-rw-r--r-- | drivers/media/video/cx18/cx18-gpio.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-gpio.c b/drivers/media/video/cx18/cx18-gpio.c new file mode 100644 index 000000000000..19253e6b8673 --- /dev/null +++ b/drivers/media/video/cx18/cx18-gpio.c @@ -0,0 +1,74 @@ +/* + * cx18 gpio functions + * + * Derived from ivtv-gpio.c + * + * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> + * + * 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 "cx18-driver.h" +#include "cx18-cards.h" +#include "cx18-gpio.h" +#include "tuner-xc2028.h" + +/********************* GPIO stuffs *********************/ + +/* GPIO registers */ +#define CX18_REG_GPIO_IN 0xc72010 +#define CX18_REG_GPIO_OUT1 0xc78100 +#define CX18_REG_GPIO_DIR1 0xc78108 +#define CX18_REG_GPIO_OUT2 0xc78104 +#define CX18_REG_GPIO_DIR2 0xc7810c + +/* + * HVR-1600 GPIO pins, courtesy of Hauppauge: + * + * gpio0: zilog ir process reset pin + * gpio1: zilog programming pin (you should never use this) + * gpio12: cx24227 reset pin + * gpio13: cs5345 reset pin +*/ + +void cx18_gpio_init(struct cx18 *cx) +{ + if (cx->card->gpio_init.direction == 0) + return; + + CX18_DEBUG_INFO("GPIO initial dir: %08x out: %08x\n", + read_reg(CX18_REG_GPIO_DIR1), read_reg(CX18_REG_GPIO_OUT1)); + + /* init output data then direction */ + write_reg(cx->card->gpio_init.direction << 16, CX18_REG_GPIO_DIR1); + write_reg(0, CX18_REG_GPIO_DIR2); + write_reg((cx->card->gpio_init.direction << 16) | + cx->card->gpio_init.initial_value, CX18_REG_GPIO_OUT1); + write_reg(0, CX18_REG_GPIO_OUT2); +} + +/* Xceive tuner reset function */ +int cx18_reset_tuner_gpio(void *dev, int cmd, int value) +{ + struct i2c_algo_bit_data *algo = dev; + struct cx18 *cx = algo->data; +/* int curdir, curout;*/ + + if (cmd != XC2028_TUNER_RESET) + return 0; + CX18_DEBUG_INFO("Resetting tuner\n"); + return 0; +} |