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bsps/shared: Allow setting baud rate for zynq uart

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Closes #4236
This commit is contained in:
Jan Sommer
2021-02-22 16:39:59 +01:00
parent 2f323700b9
commit 645dbc5fcc
1 changed files with 16 additions and 5 deletions
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21
bsps/arm/shared/serial/zynq-uart.c
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@@ -144,14 +144,22 @@ static bool zynq_uart_set_attributes(
{
zynq_uart_context *ctx = (zynq_uart_context *) context;
volatile zynq_uart *regs = ctx->regs;
int32_t baud;
uint32_t brgr = 0;
uint32_t bauddiv = 0;
uint32_t mode = 0;
int rc;
rc = zynq_cal_baud_rate(115200, &brgr, &bauddiv, regs->mode);
if (rc != 0)
return rc;
/*
* Determine the baud rate
*/
baud = rtems_termios_baud_to_number(term->c_ospeed);
if (baud > 0) {
rc = zynq_cal_baud_rate(baud, &brgr, &bauddiv, regs->mode);
if (rc != 0)
return rc;
}
/*
* Configure the mode register
@@ -202,8 +210,11 @@ static bool zynq_uart_set_attributes(
regs->control &= ~(ZYNQ_UART_CONTROL_RXEN | ZYNQ_UART_CONTROL_TXEN);
regs->mode = mode;
regs->baud_rate_gen = ZYNQ_UART_BAUD_RATE_GEN_CD(brgr);
regs->baud_rate_div = ZYNQ_UART_BAUD_RATE_DIV_BDIV(bauddiv);
/* Ignore baud rate of B0. There are no modem control lines to de-assert */
if (baud > 0) {
regs->baud_rate_gen = ZYNQ_UART_BAUD_RATE_GEN_CD(brgr);
regs->baud_rate_div = ZYNQ_UART_BAUD_RATE_DIV_BDIV(bauddiv);
}
regs->control |= ZYNQ_UART_CONTROL_RXEN | ZYNQ_UART_CONTROL_TXEN;
return true;