/**
* serial_havechar - checks if data available for reading
*
* Returns 1 if data available, 0 otherwise
*/
int serial_havechar(void)
{
/* Return if data is already read */
if (uart_ready_data_count)
return 1;
/* Read data from the FIFO */
if (msm_boot_uart_dm_read() != IPQ_UART_DM_E_SUCCESS)
return 0;
return 1;
}
/**
* uart_can_rx_byte - checks if data available for reading
*
* Returns 1 if data available, 0 otherwise
*/
#if 0 /* Not used yet */
int uart_can_rx_byte(void)
{
/* Return if data is already read */
if (valid_data)
return 1;
/* Read data from the FIFO */
if (msm_boot_uart_dm_read(&word, &valid_data, 0) !=
MSM_BOOT_UART_DM_E_SUCCESS)
return 0;
return 1;
}
static int uart_serial_tstc(uart_cfg_t *uart_tmp_cfg)
{
/* Return if data is already read */
if (uart_valid_data)
return 1;
/* Read data from the FIFO */
if (msm_boot_uart_dm_read(&uart_word, &uart_valid_data, 0,
uart_tmp_cfg) != MSM_BOOT_UART_DM_E_SUCCESS)
return 0;
return 1;
}
/**
* serial_tstc - checks if data available for reading
*
* Returns 1 if data available, 0 otherwise
*/
int serial_tstc(void)
{
uart_cfg_t *uart_tmp_cfg = gboard_param->console_uart_cfg;
/* Return if data is already read */
if (valid_data)
return 1;
/* Read data from the FIFO */
if (msm_boot_uart_dm_read(&word, &valid_data, 0,
uart_tmp_cfg) != MSM_BOOT_UART_DM_E_SUCCESS)
return 0;
return 1;
}
/* UART_DM uses four character word FIFO whereas uart_getc
* is supposed to read only one character. So we need to
* read a word and keep track of each character in the word.
*/
int uart_getc(int port, bool wait)
{
int byte;
static unsigned int word = 0;
if (!word)
{
/* Read from FIFO only if it's a first read or all the four
* characters out of a word have been read */
if (msm_boot_uart_dm_read( &word, wait) != MSM_BOOT_UART_DM_E_SUCCESS)
{
return -1;
}
}
byte = (int) word & 0xff;
word = word >> 8;
return byte;
}
/* UART_DM uses four character word FIFO whereas uart_getc
* is supposed to read only one character. So we need to
* read a word and keep track of each character in the word.
*/
int uart_getc(int port, bool wait)
{
int byte;
static unsigned int word = 0;
uint32_t uart_base = port_lookup[port];
/* Don't do anything if UART is not initialized */
if (!uart_init_flag)
return -1;
if (!word) {
/* Read from FIFO only if it's a first read or all the four
* characters out of a word have been read */
if (msm_boot_uart_dm_read(uart_base, &word, wait) != MSM_BOOT_UART_DM_E_SUCCESS) {
return -1;
}
}
byte = (int)word & 0xff;
word = word >> 8;
return byte;
}
