209 lines
6.3 KiB
C
209 lines
6.3 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef SERIAL_INTER_H
|
|
#define SERIAL_INTER_H
|
|
|
|
struct shared_buf;
|
|
|
|
/* Maximum serial devices supported by the platform. */
|
|
#define SERIAL_MAX_DEVS 1
|
|
|
|
/* Maximum length of unique id of each UART port enabled in platform. */
|
|
#define SERIAL_ID_MAX_LENGTH 8
|
|
|
|
/* SERIAL error values */
|
|
#define SERIAL_SUCCESS 0
|
|
#define SERIAL_EOF -1
|
|
#define SERIAL_ERROR -2
|
|
#define SERIAL_DEV_NOT_FOUND -3
|
|
#define INVALID_COM_PORT -4
|
|
#define SERIAL_NO_char_AVAIL -5
|
|
|
|
#define SERIAL_INVALID_HANDLE 0xFFFFFFFF
|
|
|
|
/* Pending interrupt defines */
|
|
#define SD_NO_INTERRUPT 0
|
|
#define SD_RX_INTERRUPT 1
|
|
|
|
/* RX error defines */
|
|
#define SD_RX_NO_ERROR 0
|
|
#define SD_RX_OVERRUN_ERROR 1
|
|
#define SD_RX_PARITY_ERROR 2
|
|
#define SD_RX_FRAME_ERROR 3
|
|
|
|
/* Defines for encoding/decoding the unique UART handle of each port. */
|
|
|
|
#define SERIAL_MAGIC_NUM 0x005500AA
|
|
#define SERIAL_VALIDATE_HANDLE(handle) \
|
|
((handle & 0xFFFF00FF) == (SERIAL_MAGIC_NUM))
|
|
#define SERIAL_ENCODE_INDEX(index) ((SERIAL_MAGIC_NUM) | (index << 8))
|
|
#define SERIAL_DECODE_INDEX(handle) ((handle & 0x0000FF00) >> 8)
|
|
|
|
#define NO_SUSPEND 0
|
|
#define SUSPEND 0xFFFFFFFFUL
|
|
|
|
/* Enumeration values to set UART Configuration */
|
|
typedef enum _baudenum_ {
|
|
/* Baud Rate Options */
|
|
BAUD_110 = 110, /* not supported on OMAP5 */
|
|
BAUD_300 = 300,
|
|
BAUD_600 = 600,
|
|
BAUD_1200 = 1200,
|
|
BAUD_2400 = 2400,
|
|
BAUD_4800 = 4800,
|
|
BAUD_9600 = 9600,
|
|
BAUD_14400 = 14400,
|
|
BAUD_19200 = 19200,
|
|
BAUD_28800 = 28800,
|
|
BAUD_38400 = 38400,
|
|
BAUD_57600 = 57600,
|
|
BAUD_115200 = 115200,
|
|
BAUD_230400 = 230400,
|
|
BAUD_460800 = 460800,
|
|
BAUD_921600 = 921600,
|
|
BAUD_1843000 = 1843000,
|
|
BAUD_36884000 = 36884000
|
|
} BAUD_ENUM;
|
|
|
|
typedef enum _flowenum_ {
|
|
/* Flow Control Bits */
|
|
FLOW_NONE = 0,
|
|
FLOW_HARD = 1,
|
|
FLOW_X = 2
|
|
} FLOW_ENUM;
|
|
|
|
typedef enum _parityenum_ {
|
|
/* Parity Bits */
|
|
PARITY_NONE = 0,
|
|
PARITY_ODD = 1,
|
|
PARITY_EVEN = 2,
|
|
PARITY_MARK = 3,
|
|
PARITY_SPACE = 4
|
|
} PARITY_ENUM;
|
|
|
|
typedef enum _stopenum_ {
|
|
/* Stop Bits */
|
|
STOP_1 = 1,
|
|
STOP_2 = 2
|
|
} STOP_ENUM;
|
|
|
|
typedef enum _dataenum_ {
|
|
/* Data bits */
|
|
DATA_7 = 7,
|
|
DATA_8 = 8
|
|
} DATA_ENUM;
|
|
|
|
/* Control Block definition about error in Rx data */
|
|
struct rx_error {
|
|
uint32_t parity_errors;
|
|
uint32_t frame_errors;
|
|
uint32_t overrun_errors;
|
|
uint32_t general_errors;
|
|
};
|
|
|
|
/* Control Block definition for configuration specific
|
|
* parameters of UART
|
|
*/
|
|
struct uart_config {
|
|
uint32_t data_bits;
|
|
uint32_t stop_bits;
|
|
uint32_t parity_bits;
|
|
uint32_t baud_rate;
|
|
uint32_t flow_control;
|
|
|
|
/* Read mode of UART port in interrupt mode. It can be NO_SUSPEND or
|
|
* SUSPEND or (1-4,294,967,293). SUSPEND means unlimited blocking,
|
|
* NO_SUSPEND means non-blocking and some integer value means timeout
|
|
* blocking support. By default, it is set to SUSPEND.
|
|
*/
|
|
uint32_t read_mode;
|
|
|
|
};
|
|
|
|
/* Control Block definition for target specific driver
|
|
* of UART
|
|
*/
|
|
struct tgt_uart {
|
|
char uart_id[SERIAL_ID_MAX_LENGTH];
|
|
uint64_t base_address;
|
|
uint32_t clock_frequency;
|
|
uint32_t buffer_size;
|
|
int open_count;
|
|
|
|
/* Target specific function pointers. */
|
|
int (*init)(struct tgt_uart *tgt_uart);
|
|
int (*open)(struct tgt_uart *tgt_uart, struct uart_config *config);
|
|
void (*close)(struct tgt_uart *tgt_uart);
|
|
void (*read)(struct tgt_uart *tgt_uart,
|
|
void *buffer, uint32_t *bytes_read);
|
|
void (*write)(struct tgt_uart *tgt_uart,
|
|
const void *buffer, uint32_t *bytes_written);
|
|
bool (*tx_is_busy)(struct tgt_uart *tgt_uart);
|
|
bool (*rx_data_is_avail)(struct tgt_uart *tgt_uart, uint32_t *lsr_reg);
|
|
int (*get_rx_err)(uint32_t rx_data);
|
|
};
|
|
|
|
/* Control Block definition of light-weight serial driver */
|
|
struct uart {
|
|
/* Pointer to target specific Control Block of UART */
|
|
struct tgt_uart *tgt_uart;
|
|
|
|
/* Configuration of UART */
|
|
struct uart_config config;
|
|
|
|
/* Errors in data received from UART port */
|
|
struct rx_error rx_error;
|
|
|
|
/* Pointer to receive circular buffer */
|
|
struct shared_buf *rx_sio_queue;
|
|
|
|
/* Lock to provide mutual exclusion for transmitting data to UART port*/
|
|
spinlock_t tx_lock;
|
|
|
|
/* Lock to provide mutual exclusion for accessing shared buffer */
|
|
spinlock_t buffer_lock;
|
|
|
|
/* Flag to indicate whether UART port is opened or not */
|
|
uint8_t open_flag;
|
|
|
|
};
|
|
|
|
/* Null terminated array of target specific UART control blocks */
|
|
extern struct tgt_uart Tgt_Uarts[SERIAL_MAX_DEVS];
|
|
|
|
uint32_t serial_open(char *uart_id);
|
|
int serial_getc(uint32_t uart_handle);
|
|
int serial_gets(uint32_t uart_handle, char *buffer, uint32_t length);
|
|
int serial_puts(uint32_t uart_handle, const char *s, uint32_t length);
|
|
int serial_get_rx_data(uint32_t uart_handle);
|
|
|
|
#endif /* !SERIAL_INTER_H */
|