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uart: Add invert, get/set IIR and fifo empty functions

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CTCaer 2019-12-16 22:16:40 +02:00
parent e3fca2bce5
commit 2f43145131
4 changed files with 130 additions and 0 deletions
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61
bootloader/soc/uart.c
View file

@ -104,3 +104,64 @@ u32 uart_recv(u32 idx, u8 *buf, u32 len)
return i ? (len ? (i - 1) : i) : 0; return i ? (len ? (i - 1) : i) : 0;
} }
void uart_invert(u32 idx, bool enable, u32 invert_mask)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
if (enable)
uart->UART_IRDA_CSR |= invert_mask;
else
uart->UART_IRDA_CSR &= ~invert_mask;
(void)uart->UART_SPR;
}
u32 uart_get_IIR(u32 idx)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
return uart->UART_IIR_FCR;
}
void uart_set_IIR(u32 idx)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
uart->UART_IER_DLAB &= ~UART_IER_DLAB_IE_EORD;
(void)uart->UART_SPR;
uart->UART_IER_DLAB |= UART_IER_DLAB_IE_EORD;
(void)uart->UART_SPR;
}
void uart_empty_fifo(u32 idx, u32 which)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
uart->UART_MCR = 0;
(void)uart->UART_SPR;
usleep(96);
uart->UART_IIR_FCR = UART_IIR_FCR_EN_FIFO | UART_IIR_FCR_TX_CLR | UART_IIR_FCR_RX_CLR;
(void)uart->UART_SPR;
usleep(18);
u32 tries = 0;
if (UART_IIR_FCR_TX_CLR & which)
{
while (tries < 10 && uart->UART_LSR & UART_LSR_TMTY)
{
tries++;
usleep(100);
}
tries = 0;
}
if (UART_IIR_FCR_RX_CLR & which)
{
while (tries < 10 && !uart->UART_LSR & UART_LSR_RDR)
{
tries++;
usleep(100);
}
}
}

4
bootloader/soc/uart.h
View file

@ -78,5 +78,9 @@ void uart_init(u32 idx, u32 baud);
void uart_wait_idle(u32 idx, u32 which); void uart_wait_idle(u32 idx, u32 which);
void uart_send(u32 idx, const u8 *buf, u32 len); void uart_send(u32 idx, const u8 *buf, u32 len);
u32 uart_recv(u32 idx, u8 *buf, u32 len); u32 uart_recv(u32 idx, u8 *buf, u32 len);
void uart_invert(u32 idx, bool enable, u32 invert_mask);
u32 uart_get_IIR(u32 idx);
void uart_set_IIR(u32 idx);
void uart_empty_fifo(u32 idx, u32 which);
#endif #endif

61
nyx/nyx_gui/soc/uart.c
View file

@ -104,3 +104,64 @@ u32 uart_recv(u32 idx, u8 *buf, u32 len)
return i ? (len ? (i - 1) : i) : 0; return i ? (len ? (i - 1) : i) : 0;
} }
void uart_invert(u32 idx, bool enable, u32 invert_mask)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
if (enable)
uart->UART_IRDA_CSR |= invert_mask;
else
uart->UART_IRDA_CSR &= ~invert_mask;
(void)uart->UART_SPR;
}
u32 uart_get_IIR(u32 idx)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
return uart->UART_IIR_FCR;
}
void uart_set_IIR(u32 idx)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
uart->UART_IER_DLAB &= ~UART_IER_DLAB_IE_EORD;
(void)uart->UART_SPR;
uart->UART_IER_DLAB |= UART_IER_DLAB_IE_EORD;
(void)uart->UART_SPR;
}
void uart_empty_fifo(u32 idx, u32 which)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
uart->UART_MCR = 0;
(void)uart->UART_SPR;
usleep(96);
uart->UART_IIR_FCR = UART_IIR_FCR_EN_FIFO | UART_IIR_FCR_TX_CLR | UART_IIR_FCR_RX_CLR;
(void)uart->UART_SPR;
usleep(18);
u32 tries = 0;
if (UART_IIR_FCR_TX_CLR & which)
{
while (tries < 10 && uart->UART_LSR & UART_LSR_TMTY)
{
tries++;
usleep(100);
}
tries = 0;
}
if (UART_IIR_FCR_RX_CLR & which)
{
while (tries < 10 && !uart->UART_LSR & UART_LSR_RDR)
{
tries++;
usleep(100);
}
}
}

4
nyx/nyx_gui/soc/uart.h
View file

@ -78,5 +78,9 @@ void uart_init(u32 idx, u32 baud);
void uart_wait_idle(u32 idx, u32 which); void uart_wait_idle(u32 idx, u32 which);
void uart_send(u32 idx, const u8 *buf, u32 len); void uart_send(u32 idx, const u8 *buf, u32 len);
u32 uart_recv(u32 idx, u8 *buf, u32 len); u32 uart_recv(u32 idx, u8 *buf, u32 len);
void uart_invert(u32 idx, bool enable, u32 invert_mask);
u32 uart_get_IIR(u32 idx);
void uart_set_IIR(u32 idx);
void uart_empty_fifo(u32 idx, u32 which);
#endif #endif