diff options
Diffstat (limited to 'drivers/serial/bfin_5xx.c')
| -rw-r--r-- | drivers/serial/bfin_5xx.c | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index a9eff2b18ea..19cac9f610f 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -23,6 +23,7 @@ #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial_core.h> +#include <linux/dma-mapping.h> #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) @@ -33,12 +34,10 @@ #include <asm/gpio.h> #include <mach/bfin_serial_5xx.h> -#ifdef CONFIG_SERIAL_BFIN_DMA -#include <linux/dma-mapping.h> +#include <asm/dma.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/cacheflush.h> -#endif #ifdef CONFIG_SERIAL_BFIN_MODULE # undef CONFIG_EARLY_PRINTK @@ -360,7 +359,6 @@ static void bfin_serial_tx_chars(struct bfin_serial_port *uart) UART_PUT_CHAR(uart, xmit->buf[xmit->tail]); xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); uart->port.icount.tx++; - SSYNC(); } if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) @@ -688,6 +686,13 @@ static int bfin_serial_startup(struct uart_port *port) # ifdef CONFIG_BF54x { + /* + * UART2 and UART3 on BF548 share interrupt PINs and DMA + * controllers with SPORT2 and SPORT3. UART rx and tx + * interrupts are generated in PIO mode only when configure + * their peripheral mapping registers properly, which means + * request corresponding DMA channels in PIO mode as well. + */ unsigned uart_dma_ch_rx, uart_dma_ch_tx; switch (uart->port.irq) { @@ -734,8 +739,7 @@ static int bfin_serial_startup(struct uart_port *port) IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_DISABLED, "BFIN_UART_CTS", uart)) { uart->cts_pin = -1; - pr_info("Unable to attach BlackFin UART CTS interrupt.\ - So, disable it.\n"); + pr_info("Unable to attach BlackFin UART CTS interrupt. So, disable it.\n"); } } if (uart->rts_pin >= 0) { @@ -747,8 +751,7 @@ static int bfin_serial_startup(struct uart_port *port) if (request_irq(uart->status_irq, bfin_serial_mctrl_cts_int, IRQF_DISABLED, "BFIN_UART_MODEM_STATUS", uart)) { - pr_info("Unable to attach BlackFin UART Modem \ - Status interrupt.\n"); + pr_info("Unable to attach BlackFin UART Modem Status interrupt.\n"); } /* CTS RTS PINs are negative assertive. */ @@ -846,6 +849,8 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, if (termios->c_cflag & CMSPAR) lcr |= STP; + spin_lock_irqsave(&uart->port.lock, flags); + port->read_status_mask = OE; if (termios->c_iflag & INPCK) port->read_status_mask |= (FE | PE); @@ -875,8 +880,6 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, if (termios->c_line != N_IRDA) quot -= ANOMALY_05000230; - spin_lock_irqsave(&uart->port.lock, flags); - UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15); /* Disable UART */ @@ -1321,6 +1324,14 @@ struct console __init *bfin_earlyserial_init(unsigned int port, struct bfin_serial_port *uart; struct ktermios t; +#ifdef CONFIG_SERIAL_BFIN_CONSOLE + /* + * If we are using early serial, don't let the normal console rewind + * log buffer, since that causes things to be printed multiple times + */ + bfin_serial_console.flags &= ~CON_PRINTBUFFER; +#endif + if (port == -1 || port >= nr_active_ports) port = 0; bfin_serial_init_ports(); |