diff options
Diffstat (limited to 'drivers/media/pci/solo6x10/solo6x10-gpio.c')
| -rw-r--r-- | drivers/media/pci/solo6x10/solo6x10-gpio.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/media/pci/solo6x10/solo6x10-gpio.c b/drivers/media/pci/solo6x10/solo6x10-gpio.c new file mode 100644 index 000000000000..6d3b4a36bc11 --- /dev/null +++ b/drivers/media/pci/solo6x10/solo6x10-gpio.c @@ -0,0 +1,105 @@ +/* + * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com> + * + * Original author: + * Ben Collins <bcollins@ubuntu.com> + * + * Additional work by: + * John Brooks <john.brooks@bluecherry.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. + */ + +#include <linux/kernel.h> +#include <linux/fs.h> +#include <linux/delay.h> +#include <linux/uaccess.h> + +#include "solo6x10.h" + +static void solo_gpio_mode(struct solo_dev *solo_dev, + unsigned int port_mask, unsigned int mode) +{ + int port; + unsigned int ret; + + ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0); + + /* To set gpio */ + for (port = 0; port < 16; port++) { + if (!((1 << port) & port_mask)) + continue; + + ret &= (~(3 << (port << 1))); + ret |= ((mode & 3) << (port << 1)); + } + + solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_0, ret); + + /* To set extended gpio - sensor */ + ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1); + + for (port = 0; port < 16; port++) { + if (!((1 << (port + 16)) & port_mask)) + continue; + + if (!mode) + ret &= ~(1 << port); + else + ret |= 1 << port; + } + + solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret); +} + +static void solo_gpio_set(struct solo_dev *solo_dev, unsigned int value) +{ + solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT, + solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) | value); +} + +static void solo_gpio_clear(struct solo_dev *solo_dev, unsigned int value) +{ + solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT, + solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) & ~value); +} + +static void solo_gpio_config(struct solo_dev *solo_dev) +{ + /* Video reset */ + solo_gpio_mode(solo_dev, 0x30, 1); + solo_gpio_clear(solo_dev, 0x30); + udelay(100); + solo_gpio_set(solo_dev, 0x30); + udelay(100); + + /* Warning: Don't touch the next line unless you're sure of what + * you're doing: first four gpio [0-3] are used for video. */ + solo_gpio_mode(solo_dev, 0x0f, 2); + + /* We use bit 8-15 of SOLO_GPIO_CONFIG_0 for relay purposes */ + solo_gpio_mode(solo_dev, 0xff00, 1); + + /* Initially set relay status to 0 */ + solo_gpio_clear(solo_dev, 0xff00); +} + +int solo_gpio_init(struct solo_dev *solo_dev) +{ + solo_gpio_config(solo_dev); + return 0; +} + +void solo_gpio_exit(struct solo_dev *solo_dev) +{ + solo_gpio_clear(solo_dev, 0x30); + solo_gpio_config(solo_dev); +} |