diff options
Diffstat (limited to 'drivers/video/av8100/hdmi.c')
| -rw-r--r-- | drivers/video/av8100/hdmi.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/video/av8100/hdmi.c b/drivers/video/av8100/hdmi.c new file mode 100644 index 00000000000..cb6d1077876 --- /dev/null +++ b/drivers/video/av8100/hdmi.c @@ -0,0 +1,195 @@ +/* + * Copyright (C) ST-Ericsson AB 2010 + * + * ST-Ericsson HDMI driver + * + * Author: Per Persson <per.xb.persson@stericsson.com> + * for ST-Ericsson. + * + * License terms: GNU General Public License (GPL), version 2. + */ + +#include <linux/kernel.h> +#include <linux/miscdevice.h> +#include <linux/fs.h> +#include <linux/ioctl.h> +#include <linux/uaccess.h> +#include <video/hdmi.h> +#include <video/av8100.h> + +static int hdmi_open(struct inode *inode, struct file *filp) +{ + int retval = 0; + return retval; +} + +static int hdmi_release(struct inode *inode, struct file *filp) +{ + int retval = 0; + return retval; +} + +static int hdmi_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + int retval = 0; + int value = 0; + union av8100_configuration config; + struct hdmi_register reg; + struct hdmi_command_register command_reg; + struct av8100_status status; + + switch (cmd) { + case IOC_HDMI_POWER: + /* Get desired power state on or off */ + if (copy_from_user(&value, (void *)arg, sizeof(int))) + return -EINVAL; + + if (value == 0) { + if (av8100_powerdown() != AV8100_OK) { + printk(KERN_ERR "av8100_powerdown FAIL\n"); + return -EINVAL; + } + } else { + if (av8100_powerup() != AV8100_OK) { + printk(KERN_ERR "av8100_powerup FAIL\n"); + return -EINVAL; + } + } + break; + + case IOC_HDMI_ENABLE_INTERRUPTS: + if (av8100_enable_interrupt() != AV8100_OK) { + printk(KERN_ERR "av8100_configuration_get FAIL\n"); + return -EINVAL; + } + break; + + case IOC_HDMI_DOWNLOAD_FW: + if (av8100_download_firmware(NULL, 0, I2C_INTERFACE) != + AV8100_OK) { + printk(KERN_ERR "av8100_configuration_get FAIL\n"); + return -EINVAL; + } + break; + + case IOC_HDMI_ONOFF: + /* Get desired HDMI mode on or off */ + if (copy_from_user(&value, (void *)arg, sizeof(int))) + return -EFAULT; + + if (av8100_configuration_get(AV8100_COMMAND_HDMI, &config) != + AV8100_OK) { + printk(KERN_ERR "av8100_configuration_get FAIL\n"); + return -EINVAL; + } + if (value == 0) + config.hdmi_format.hdmi_mode = AV8100_HDMI_OFF; + else + config.hdmi_format.hdmi_mode = AV8100_HDMI_ON; + + if (av8100_configuration_prepare(AV8100_COMMAND_HDMI, &config) + != AV8100_OK) { + printk(KERN_ERR "av8100_configuration_prepare FAIL\n"); + return -EINVAL; + } + if (av8100_configuration_write(AV8100_COMMAND_HDMI, NULL, NULL, + I2C_INTERFACE) != AV8100_OK) { + printk(KERN_ERR "av8100_configuration_write FAIL\n"); + return -EINVAL; + } + break; + + case IOC_HDMI_REGISTER_WRITE: + if (copy_from_user(®, (void *)arg, + sizeof(struct hdmi_register))) { + return -EINVAL; + } + + if (av8100_register_write(reg.offset, reg.value) != + AV8100_OK) { + printk(KERN_ERR "hdmi_register_write FAIL\n"); + return -EINVAL; + } + break; + + case IOC_HDMI_REGISTER_READ: + if (copy_from_user(®, (void *)arg, + sizeof(struct hdmi_register))) { + return -EINVAL; + } + + if (av8100_register_read(reg.offset, ®.value) != + AV8100_OK) { + printk(KERN_ERR "hdmi_register_write FAIL\n"); + return -EINVAL; + } + + if (copy_to_user((void *)arg, (void *)®, + sizeof(struct hdmi_register))) { + return -EINVAL; + } + break; + + case IOC_HDMI_STATUS_GET: + status = av8100_status_get(); + + if (copy_to_user((void *)arg, (void *)&status, + sizeof(struct av8100_status))) { + return -EINVAL; + } + break; + + case IOC_HDMI_CONFIGURATION_WRITE: + if (copy_from_user(&command_reg, (void *)arg, + sizeof(struct hdmi_command_register)) != 0) { + printk(KERN_ERR "IOC_HDMI_CONFIGURATION_WRITE fail 1\n"); + command_reg.return_status = + HDMI_COMMAND_RETURN_STATUS_FAIL; + } else { + if (av8100_configuration_write_raw(command_reg.cmd_id, + command_reg.buf_len, + command_reg.buf, + &(command_reg.buf_len), + command_reg.buf) != AV8100_OK) { + printk(KERN_ERR "IOC_HDMI_CONFIGURATION_WRITE fail 1\n"); + command_reg.return_status = + HDMI_COMMAND_RETURN_STATUS_FAIL; + } + } + + if (copy_to_user((void *)arg, (void *)&command_reg, + sizeof(struct hdmi_command_register)) != 0) { + return -EINVAL; + } + break; + + default: + break; + } + + return retval; +} + +static const struct file_operations hdmi_fops = { + .owner = THIS_MODULE, + .open = hdmi_open, + .release = hdmi_release, + .ioctl = hdmi_ioctl +}; + +static struct miscdevice hdmi_miscdev = { + HDMI_DRIVER_MINOR_NUMBER, + "hdmi", + &hdmi_fops +}; + +int __init hdmi_init(void) +{ + return misc_register(&hdmi_miscdev); +} + +void hdmi_exit(void) +{ + misc_deregister(&hdmi_miscdev); +} |