diff options
author | Paul Mackerras <paulus@samba.org> | 2005-11-07 14:42:09 +1100 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2005-11-07 14:42:09 +1100 |
commit | c6135234550ed89a6fd0e8cb229633967e41d649 (patch) | |
tree | 22cef33e314839c4fb30d6fc888c0caa2a0f6602 /drivers/serial/8250.c | |
parent | 76032de898f34db55b5048349db56557828a1390 (diff) | |
parent | 0b154bb7d0cce80e9c0bcf11d4f9e71b59409d26 (diff) |
Merge ../linux-2.6
Diffstat (limited to 'drivers/serial/8250.c')
-rw-r--r-- | drivers/serial/8250.c | 73 |
1 files changed, 70 insertions, 3 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index f47d2c454e3..186e96c47b3 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -251,9 +251,53 @@ static const struct serial8250_config uart_config[] = { }, }; +#ifdef CONFIG_SERIAL_8250_AU1X00 + +/* Au1x00 UART hardware has a weird register layout */ +static const u8 au_io_in_map[] = { + [UART_RX] = 0, + [UART_IER] = 2, + [UART_IIR] = 3, + [UART_LCR] = 5, + [UART_MCR] = 6, + [UART_LSR] = 7, + [UART_MSR] = 8, +}; + +static const u8 au_io_out_map[] = { + [UART_TX] = 1, + [UART_IER] = 2, + [UART_FCR] = 4, + [UART_LCR] = 5, + [UART_MCR] = 6, +}; + +/* sane hardware needs no mapping */ +static inline int map_8250_in_reg(struct uart_8250_port *up, int offset) +{ + if (up->port.iotype != UPIO_AU) + return offset; + return au_io_in_map[offset]; +} + +static inline int map_8250_out_reg(struct uart_8250_port *up, int offset) +{ + if (up->port.iotype != UPIO_AU) + return offset; + return au_io_out_map[offset]; +} + +#else + +/* sane hardware needs no mapping */ +#define map_8250_in_reg(up, offset) (offset) +#define map_8250_out_reg(up, offset) (offset) + +#endif + static _INLINE_ unsigned int serial_in(struct uart_8250_port *up, int offset) { - offset <<= up->port.regshift; + offset = map_8250_in_reg(up, offset) << up->port.regshift; switch (up->port.iotype) { case UPIO_HUB6: @@ -266,6 +310,11 @@ static _INLINE_ unsigned int serial_in(struct uart_8250_port *up, int offset) case UPIO_MEM32: return readl(up->port.membase + offset); +#ifdef CONFIG_SERIAL_8250_AU1X00 + case UPIO_AU: + return __raw_readl(up->port.membase + offset); +#endif + default: return inb(up->port.iobase + offset); } @@ -274,7 +323,7 @@ static _INLINE_ unsigned int serial_in(struct uart_8250_port *up, int offset) static _INLINE_ void serial_out(struct uart_8250_port *up, int offset, int value) { - offset <<= up->port.regshift; + offset = map_8250_out_reg(up, offset) << up->port.regshift; switch (up->port.iotype) { case UPIO_HUB6: @@ -290,6 +339,12 @@ serial_out(struct uart_8250_port *up, int offset, int value) writel(value, up->port.membase + offset); break; +#ifdef CONFIG_SERIAL_8250_AU1X00 + case UPIO_AU: + __raw_writel(value, up->port.membase + offset); + break; +#endif + default: outb(value, up->port.iobase + offset); } @@ -910,6 +965,13 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) } } #endif + +#ifdef CONFIG_SERIAL_8250_AU1X00 + /* if access method is AU, it is a 16550 with a quirk */ + if (up->port.type == PORT_16550A && up->port.iotype == UPIO_AU) + up->bugs |= UART_BUG_NOMSR; +#endif + serial_outp(up, UART_LCR, save_lcr); if (up->capabilities != uart_config[up->port.type].flags) { @@ -1057,6 +1119,10 @@ static void serial8250_enable_ms(struct uart_port *port) { struct uart_8250_port *up = (struct uart_8250_port *)port; + /* no MSR capabilities */ + if (up->bugs & UART_BUG_NOMSR) + return; + up->ier |= UART_IER_MSI; serial_out(up, UART_IER, up->ier); } @@ -1774,7 +1840,8 @@ serial8250_set_termios(struct uart_port *port, struct termios *termios, * CTS flow control flag and modem status interrupts */ up->ier &= ~UART_IER_MSI; - if (UART_ENABLE_MS(&up->port, termios->c_cflag)) + if (!(up->bugs & UART_BUG_NOMSR) && + UART_ENABLE_MS(&up->port, termios->c_cflag)) up->ier |= UART_IER_MSI; if (up->capabilities & UART_CAP_UUE) up->ier |= UART_IER_UUE | UART_IER_RTOIE; |