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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2018-04-12 14:33:14 -0700 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-04-17 09:21:10 +0200 |
| commit | c2ee90fb9ed90c3612301e2b86c05cfb3c008fde (patch) | |
| tree | bf1200bdc97642a02a7ed89cca57be1daf57ef9c /include/serdev.h | |
| parent | 84fc6119d3aaa33344d154428ce37800a96a39b9 (diff) | |
| download | barebox-c2ee90fb9ed90c3612301e2b86c05cfb3c008fde.tar.gz barebox-c2ee90fb9ed90c3612301e2b86c05cfb3c008fde.tar.xz | |
console: Add simplified 'serdev' framework from Linux kernel
Port 'serdev' UART-slave deivce framework found in recent Linux
kernels (post 4.13) in order to be able to port 'serdev' slave drivers
from Linux.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/serdev.h')
| -rw-r--r-- | include/serdev.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/serdev.h b/include/serdev.h new file mode 100644 index 0000000000..efc735fedf --- /dev/null +++ b/include/serdev.h @@ -0,0 +1,36 @@ +#ifndef _SERDEV_H_ +#define _SERDEV_H_ + +#include <driver.h> +#include <poller.h> +#include <kfifo.h> + +/** + * struct serdev_device - Basic representation of an serdev device + * + * @dev: Corresponding device + * @fifo: Circular buffer used for console draining + * @buf: Buffer used to pass Rx data to consumers + * @poller Async poller used to poll this serdev + * @polling_interval: Async poller periodicity + * @polling_window: Duration of a single busy loop poll + * @receive_buf: Function called with data received from device; + * returns number of bytes accepted; + */ +struct serdev_device { + struct device_d *dev; + struct kfifo *fifo; + unsigned char *buf; + struct poller_async poller; + uint64_t polling_interval; + uint64_t polling_window; + + int (*receive_buf)(struct serdev_device *, const unsigned char *, + size_t); +}; + +int serdev_device_open(struct serdev_device *); +unsigned int serdev_device_set_baudrate(struct serdev_device *, unsigned int); +int serdev_device_write(struct serdev_device *, const unsigned char *, + size_t, unsigned long); +#endif |