ar7 misc fixes:

- serial
 - memory probing


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6635 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ar7-2.6/files/arch/mips/ar7/memory.c

@@ -38,33 +38,26 @@
 
 #include <asm/mips-boards/prom.h>
 
-#warning FIXME: use sdram control regs and/or autodetection
 static int __init memsize(void)
 {
-	char *memsize_str;
+	u32 size = (64 << 20);
-	unsigned int result;
+	volatile u32 *addr = (u32 *)KSEG1ADDR(0x14000000 + size - 4);
-	char cmdline[CL_SIZE], *ptr;
+	u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
 
-	/* Check the command line first for a memsize directive */
+	while (addr > kernel_end) {
-	strcpy(cmdline, arcs_cmdline);
+		*addr = (u32)addr;
-	ptr = strstr(cmdline, "memsize=");
+		size >>= 1;
-	if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
+		addr -= size >> 2;
-		ptr = strstr(ptr, " memsize=");
-
-	if (ptr) {
-		result = memparse(ptr + 8, &ptr);
-	} else {
-		/* otherwise look in the environment */
-		memsize_str = prom_getenv("memsize");
-		if (!memsize_str) {
-			prom_printf("memsize not set in boot prom, set to default (8Mb)\n");
-			result = 0x00800000;
-		} else {
-			result = simple_strtol(memsize_str, NULL, 0);
-		}
 	}
 
-	return result;
+	do {
+		addr += size >> 2;
+		if (*addr != (u32)addr)
+			break;
+		size <<= 1;
+	} while (size < (64 << 20));
+
+	return size;
 }
 
 #ifdef CONFIG_NEED_MULTIPLE_NODES
@@ -167,9 +160,10 @@ void __init mem_init(void)
 
 void __init prom_meminit(void)
 {
+	unsigned long pages;
 #ifdef CONFIG_NEED_MULTIPLE_NODES
 	unsigned long kernel_start, kernel_end;
-	unsigned long pages, free_pages;
+	unsigned long free_pages;
 	unsigned long bootmap_size;
 #endif
 
@@ -196,7 +190,5 @@ void __init prom_meminit(void)
 
 unsigned long __init prom_free_prom_memory(void)
 {
-/*	return freed;
-*/
 	return 0;
 }

target/linux/ar7-2.6/files/arch/mips/ar7/platform.c

@@ -321,7 +321,7 @@ static int __init ar7_register_devices(void)
 
 	memset(uart_port, 0, sizeof(struct uart_port) * 2);
 
-	uart_port[0].type = PORT_16750;
+	uart_port[0].type = PORT_AR7;
 	uart_port[0].line = 0;
 	uart_port[0].irq = AR7_IRQ_UART0;
 	uart_port[0].uartclk = ar7_bus_freq() / 2;
@@ -333,7 +333,7 @@ static int __init ar7_register_devices(void)
 	if (res)
 		return res;
 
-	uart_port[1].type = PORT_16750;
+	uart_port[1].type = PORT_AR7;
 	uart_port[1].line = 1;
 	uart_port[1].irq = AR7_IRQ_UART1;
 	uart_port[1].uartclk = ar7_bus_freq() / 2;

target/linux/ar7-2.6/files/arch/mips/ar7/prom.c

@@ -258,7 +258,7 @@ char prom_getchar(void)
 
 int prom_putchar(char c)
 {
-	while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0);
+	while ((serial_in(UART_LSR) & UART_LSR_TEMT) == 0);
 	serial_out(UART_TX, c);
 	return 1;
 }

target/linux/ar7-2.6/patches/500-serial_kludge.patch

@@ -1,22 +1,52 @@
-diff -Nru linux-2.6.19.2/drivers/serial/8250.c linux-ar7/drivers/serial/8250.c
+diff -Nru linux-2.6.19.2/include/linux/serialP.h linux-ar7/include/linux/serialP.h
---- linux-2.6.19.2/drivers/serial/8250.c	2006-12-12 02:32:53.000000000 +0700
+--- linux-2.6.19.2/include/linux/serialP.h	2007-01-17 01:24:01.000000000 +0700
-+++ linux-ar7/drivers/serial/8250.c	2007-02-02 14:25:51.000000000 +0700
++++ linux-ar7/include/linux/serialP.h	2007-03-22 22:36:48.000000000 +0700
-@@ -2171,6 +2171,9 @@
+@@ -135,6 +135,9 @@
- 		 */
+  * the interrupt line _up_ instead of down, so if we register the IRQ
- 		up->mcr_mask = ~ALPHA_KLUDGE_MCR;
+  * while the UART is in that state, we die in an IRQ storm. */
- 		up->mcr_force = ALPHA_KLUDGE_MCR;
+ #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
-+#ifdef CONFIG_AR7
++#elif defined(CONFIG_AR7)
-+		up->mcr_force |= UART_MCR_RTS;
++/* This is how it is set up by bootloader... */
-+#endif
++#define ALPHA_KLUDGE_MCR  (UART_MCR_OUT2 | UART_MCR_OUT1 | UART_MCR_RTS | UART_MCR_DTR)
+ #else
+ #define ALPHA_KLUDGE_MCR 0
+ #endif
+diff -Nru linux-2.6.19.2/include/linux/serial_core.h linux-ar7/include/linux/serial_core.h
+--- linux-2.6.19.2/include/linux/serial_core.h	2007-01-11 02:10:37.000000000 +0700
++++ linux-ar7/include/linux/serial_core.h	2007-03-22 22:50:13.000000000 +0700
+@@ -39,7 +39,8 @@
+ #define PORT_RSA	13
+ #define PORT_NS16550A	14
+ #define PORT_XSCALE	15
+-#define PORT_MAX_8250	15	/* max port ID */
++#define PORT_AR7	16
++#define PORT_MAX_8250	16	/* max port ID */
  
- 		up->port.ops = &serial8250_pops;
+ /*
- 	}
+  * ARM specific type numbers.  These are not currently guaranteed
-@@ -2243,7 +2246,7 @@
+diff -Nru linux-2.6.19.2/drivers/serial/8250.c linux-ar7/drivers/serial/8250.c
+--- linux-2.6.19.2/drivers/serial/8250.c	2007-01-11 02:10:37.000000000 +0700
++++ linux-ar7/drivers/serial/8250.c	2007-03-22 22:45:17.000000000 +0700
+@@ -251,6 +251,13 @@
+ 		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
+ 		.flags		= UART_CAP_FIFO | UART_CAP_UUE,
+ 	},
++	[PORT_AR7] = {
++		.name		= "TI-AR7",
++		.fifo_size	= 16,
++		.tx_loadsz	= 16,
++		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_00,
++		.flags		= UART_CAP_FIFO | UART_CAP_AFE,
++	},
+ };
+ 
+ #ifdef CONFIG_SERIAL_8250_AU1X00
+@@ -2243,7 +2250,7 @@
  {
  	struct uart_8250_port *up = (struct uart_8250_port *)port;
  
 -	wait_for_xmitr(up, UART_LSR_THRE);
-+	wait_for_xmitr(up, UART_LSR_TEMT);
++	wait_for_xmitr(up, BOTH_EMPTY);
  	serial_out(up, UART_TX, ch);
  }