ramips: add preliminary support for 2.6.32

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19343 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 118 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-2.6.32/101-rt288x_serial_driver_hack.patch b/target/linux/ramips/patches-2.6.32/101-rt288x_serial_driver_hack.patch
new file mode 100644
index 000000000..06d921f21
--- /dev/null
+++ b/target/linux/ramips/patches-2.6.32/101-rt288x_serial_driver_hack.patch
@@ -0,0 +1,118 @@
+--- a/drivers/serial/8250.c
++++ b/drivers/serial/8250.c
+@@ -298,9 +298,9 @@ static const struct serial8250_config ua
+ 	},
+ };
+ 
+-#if defined (CONFIG_SERIAL_8250_AU1X00)
++#if defined (CONFIG_SERIAL_8250_AU1X00) || 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,
+@@ -418,7 +418,7 @@ static unsigned int mem32_serial_in(stru
+ 	return readl(p->membase + offset);
+ }
+ 
+-#ifdef CONFIG_SERIAL_8250_AU1X00
++#if defined(CONFIG_SERIAL_8250_AU1X00) || defined(CONFIG_SERIAL_8250_RT288X)
+ static unsigned int au_serial_in(struct uart_port *p, int offset)
+ {
+ 	offset = map_8250_in_reg(p, offset) << p->regshift;
+@@ -499,7 +499,7 @@ static void set_io_from_upio(struct uart
+ 		p->serial_out = mem32_serial_out;
+ 		break;
+ 
+-#ifdef CONFIG_SERIAL_8250_AU1X00
++#if defined (CONFIG_SERIAL_8250_AU1X00) || defined (CONFIG_SERIAL_8250_RT288X)
+ 	case UPIO_AU:
+ 		p->serial_in = au_serial_in;
+ 		p->serial_out = au_serial_out;
+@@ -531,7 +531,7 @@ serial_out_sync(struct uart_8250_port *u
+ 	switch (p->iotype) {
+ 	case UPIO_MEM:
+ 	case UPIO_MEM32:
+-#ifdef CONFIG_SERIAL_8250_AU1X00
++#if defined (CONFIG_SERIAL_8250_AU1X00) || defined (CONFIG_SERIAL_8250_RT288X)
+ 	case UPIO_AU:
+ #endif
+ 	case UPIO_DWAPB:
+@@ -569,8 +569,8 @@ static inline void _serial_dl_write(stru
+ 	serial_outp(up, UART_DLM, value >> 8 & 0xff);
+ }
+ 
+-#if defined(CONFIG_SERIAL_8250_AU1X00)
+-/* Au1x00 haven't got a standard divisor latch */
++#if defined (CONFIG_SERIAL_8250_AU1X00) || 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)
+@@ -777,22 +777,19 @@ 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_DLAB);
+ 
+-	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;
+@@ -1214,7 +1211,7 @@ static void autoconfig(struct uart_8250_
+ 	}
+ #endif
+ 
+-#ifdef CONFIG_SERIAL_8250_AU1X00
++#if defined (CONFIG_SERIAL_8250_AU1X00) || defined (CONFIG_SERIAL_8250_RT288X)
+ 	/* 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;
+--- a/drivers/serial/Kconfig
++++ b/drivers/serial/Kconfig
+@@ -266,6 +266,14 @@ config SERIAL_8250_AU1X00
+ 	  say Y to this option. The driver can handle up to 4 serial ports,
+ 	  depending on the SOC. 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
+@@ -281,7 +281,7 @@ 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_DWAPB		(6)			/* DesignWare APB UART */
+ #define UPIO_RM9000		(7)			/* RM9000 type IO */