From 90a75b050b8a23a6e8f558cc9a76658d8443509d Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sat, 14 May 2011 12:17:46 -0400 Subject: [PATCH] Blackfin: uart: implement loop callback for post This allows the Blackfin UART driver to be tested via post. Signed-off-by: Mike Frysinger --- arch/blackfin/cpu/serial.c | 40 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/arch/blackfin/cpu/serial.c b/arch/blackfin/cpu/serial.c index 030160f418..6603dc099a 100644 --- a/arch/blackfin/cpu/serial.c +++ b/arch/blackfin/cpu/serial.c @@ -38,6 +38,7 @@ */ #include +#include #include #include #include @@ -153,6 +154,30 @@ static int uart_getc(uint32_t uart_base) return uart_rbr_val; } +#if CONFIG_POST & CONFIG_SYS_POST_UART +# define LOOP(x) x +#else +# define LOOP(x) +#endif + +LOOP( +static void uart_loop(uint32_t uart_base, int state) +{ + u16 mcr; + + /* Drain the TX fifo first so bytes don't come back */ + while (!(uart_lsr_read(uart_base) & TEMT)) + continue; + + mcr = bfin_read(&pUART->mcr); + if (state) + mcr |= LOOP_ENA | MRTS; + else + mcr &= ~(LOOP_ENA | MRTS); + bfin_write(&pUART->mcr, mcr); +} +) + #ifdef CONFIG_SYS_BFIN_UART static void uart_puts(uint32_t uart_base, const char *s) @@ -202,6 +227,13 @@ static void uart##n##_puts(const char *s) \ uart_puts(MMR_UART(n), s); \ } \ \ +LOOP( \ +static void uart##n##_loop(int state) \ +{ \ + uart_loop(MMR_UART(n), state); \ +} \ +) \ +\ struct serial_device bfin_serial##n##_device = { \ .name = "bfin_uart"#n, \ .init = uart##n##_init, \ @@ -211,6 +243,7 @@ struct serial_device bfin_serial##n##_device = { \ .tstc = uart##n##_tstc, \ .putc = uart##n##_putc, \ .puts = uart##n##_puts, \ + LOOP(.loop = uart##n##_loop) \ }; #ifdef UART0_DLL @@ -307,6 +340,13 @@ void serial_puts(const char *s) serial_putc(*s++); } +LOOP( +void serial_loop(int state) +{ + uart_loop(UART_DLL, state); +} +) + #endif #endif -- 2.39.5