diff options
Diffstat (limited to 'target/linux/ramips/patches-3.2/101-rt288x_serial_driver_hack.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.2/101-rt288x_serial_driver_hack.patch | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.2/101-rt288x_serial_driver_hack.patch b/target/linux/ramips/patches-3.2/101-rt288x_serial_driver_hack.patch new file mode 100644 index 0000000000..3ba1e53231 --- /dev/null +++ b/target/linux/ramips/patches-3.2/101-rt288x_serial_driver_hack.patch @@ -0,0 +1,91 @@ +--- a/drivers/tty/serial/8250.c ++++ b/drivers/tty/serial/8250.c +@@ -318,9 +318,9 @@ static const struct serial8250_config ua + }, + }; + +-#if defined(CONFIG_MIPS_ALCHEMY) ++#if defined(CONFIG_MIPS_ALCHEMY) || defined (CONFIG_SERIAL_8250_RT288X) + +-/* Au1x00 UART hardware has a weird register layout */ ++/* Au1x00 and RT288x UART hardware has a weird register layout */ + static const u8 au_io_in_map[] = { + [UART_RX] = 0, + [UART_IER] = 2, +@@ -542,8 +542,8 @@ static inline void _serial_dl_write(stru + serial_outp(up, UART_DLM, value >> 8 & 0xff); + } + +-#if defined(CONFIG_MIPS_ALCHEMY) +-/* Au1x00 haven't got a standard divisor latch */ ++#if defined(CONFIG_MIPS_ALCHEMY) || defined (CONFIG_SERIAL_8250_RT288X) ++/* Au1x00 and RT288x haven't got a standard divisor latch */ + static int serial_dl_read(struct uart_8250_port *up) + { + if (up->port.iotype == UPIO_AU) +@@ -750,22 +750,19 @@ static int size_fifo(struct uart_8250_po + */ + static unsigned int autoconfig_read_divisor_id(struct uart_8250_port *p) + { +- unsigned char old_dll, old_dlm, old_lcr; ++ unsigned char old_lcr; ++ unsigned int old_dl; + unsigned int id; + + old_lcr = serial_inp(p, UART_LCR); + serial_outp(p, UART_LCR, UART_LCR_CONF_MODE_A); + +- old_dll = serial_inp(p, UART_DLL); +- old_dlm = serial_inp(p, UART_DLM); ++ old_dl = serial_dl_read(p); + +- serial_outp(p, UART_DLL, 0); +- serial_outp(p, UART_DLM, 0); ++ serial_dl_write(p, 0); ++ id = serial_dl_read(p); + +- id = serial_inp(p, UART_DLL) | serial_inp(p, UART_DLM) << 8; +- +- serial_outp(p, UART_DLL, old_dll); +- serial_outp(p, UART_DLM, old_dlm); ++ serial_dl_write(p, old_dl); + serial_outp(p, UART_LCR, old_lcr); + + return id; +@@ -891,7 +888,7 @@ static int broken_efr(struct uart_8250_p + /* + * Exar ST16C2550 "A2" devices incorrectly detect as + * having an EFR, and report an ID of 0x0201. See +- * http://linux.derkeiler.com/Mailing-Lists/Kernel/2004-11/4812.html ++ * http://linux.derkeiler.com/Mailing-Lists/Kernel/2004-11/4812.html + */ + if (autoconfig_read_divisor_id(up) == 0x0201 && size_fifo(up) == 16) + return 1; +--- a/drivers/tty/serial/Kconfig ++++ b/drivers/tty/serial/Kconfig +@@ -258,6 +258,14 @@ config SERIAL_8250_ACORN + system, say Y to this option. The driver can handle 1, 2, or 3 port + cards. If unsure, say N. + ++config SERIAL_8250_RT288X ++ bool "Ralink RT288x/RT305x serial port support" ++ depends on SERIAL_8250 != n && (SOC_RT288X || SOC_RT305X) ++ help ++ If you have a Ralink RT288x/RT305x SoC based board and want to use the ++ serial port, say Y to this option. The driver can handle up to 2 serial ++ ports. If unsure, say N. ++ + config SERIAL_8250_RM9K + bool "Support for MIPS RM9xxx integrated serial port" + depends on SERIAL_8250 != n && SERIAL_RM9000 +--- a/include/linux/serial_core.h ++++ b/include/linux/serial_core.h +@@ -317,7 +317,7 @@ struct uart_port { + #define UPIO_HUB6 (1) + #define UPIO_MEM (2) + #define UPIO_MEM32 (3) +-#define UPIO_AU (4) /* Au1x00 type IO */ ++#define UPIO_AU (4) /* Au1x00 and RT288x type IO */ + #define UPIO_TSI (5) /* Tsi108/109 type IO */ + #define UPIO_RM9000 (6) /* RM9000 type IO */ + |