openwrt/target/linux/brcm47xx/patches-2.6.34/014-MIPS-BCM47xx-Setup-and-register-serial-early.patch

From a41121d789e236fd637ab49beb5ce7b48763613a Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 18 Jul 2010 14:59:24 +0200
Subject: [PATCH 4/5] MIPS: BCM47xx: Setup and register serial early

Swap the first and second serial if console=ttyS1 was set.
Set it up and register it for early serial support.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 arch/mips/Kconfig         |    1 -
 arch/mips/bcm47xx/setup.c |   37 ++++++++++++++++++++++++++++++++++++-
 2 files changed, 36 insertions(+), 2 deletions(-)

--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -65,7 +65,6 @@ config BCM47XX
 	select SSB_B43_PCI_BRIDGE if PCI
 	select SSB_PCICORE_HOSTMODE if PCI
 	select GENERIC_GPIO
-	select SYS_HAS_EARLY_PRINTK
 	select CFE
 	help
 	 Support for BCM47XX based boards
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -28,6 +28,8 @@
 #include <linux/types.h>
 #include <linux/ssb/ssb.h>
 #include <linux/ssb/ssb_embedded.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
 #include <asm/bootinfo.h>
 #include <asm/reboot.h>
 #include <asm/time.h>
@@ -190,12 +192,45 @@ static int bcm47xx_get_invariants(struct
 
 void __init plat_mem_setup(void)
 {
-	int err;
+	int i, err;
+	char buf[100];
+	struct ssb_mipscore *mcore;
 
 	err = ssb_bus_ssbbus_register(&ssb_bcm47xx, SSB_ENUM_BASE,
 				      bcm47xx_get_invariants);
 	if (err)
 		panic("Failed to initialize SSB bus (err %d)\n", err);
+	mcore = &ssb_bcm47xx.mipscore;
+
+	nvram_getenv("kernel_args", buf, sizeof(buf));
+	if (!strncmp(buf, "console=ttyS1", 13)) {
+		struct ssb_serial_port port;
+
+		printk(KERN_DEBUG "Swapping serial ports!\n");
+		/* swap serial ports */
+		memcpy(&port, &mcore->serial_ports[0], sizeof(port));
+		memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
+		       sizeof(port));
+		memcpy(&mcore->serial_ports[1], &port, sizeof(port));
+	}
+
+	for (i = 0; i < mcore->nr_serial_ports; i++) {
+		struct ssb_serial_port *port = &(mcore->serial_ports[i]);
+		struct uart_port s;
+
+		memset(&s, 0, sizeof(s));
+		s.line = i;
+		s.mapbase = (unsigned int) port->regs;
+		s.membase = port->regs;
+		s.irq = port->irq + 2;
+		s.uartclk = port->baud_base;
+		s.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+		s.iotype = SERIAL_IO_MEM;
+		s.regshift = port->reg_shift;
+
+		early_serial_setup(&s);
+	}
+	printk(KERN_DEBUG "Serial init done.\n");
 
 	_machine_restart = bcm47xx_machine_restart;
 	_machine_halt = bcm47xx_machine_halt;