brcm47xx: some fixes

* fix return codes of nvram_getenv. Now it behaves like cfe_getenv.
* also check cfe for kernel_args param.
* some style fixes

SVN-Revision: 22424

1 files changed, 141 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-2.6.34/016-MIPS-BCM47xx-Remove-CFE-console.patch b/target/linux/brcm47xx/patches-2.6.34/016-MIPS-BCM47xx-Remove-CFE-console.patch
new file mode 100644
index 0000000000..329560740b
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.34/016-MIPS-BCM47xx-Remove-CFE-console.patch
@@ -0,0 +1,141 @@
+From 5219981646071abb6731634bf47781a53e248764 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun, 18 Jul 2010 15:11:26 +0200
+Subject: [PATCH 6/6] MIPS: BCM47xx: Remove CFE console
+
+Do not use the CFE console. It causes hangs on some devices like the
+Buffalo WHR-HP-G54.
+This was reported in https://dev.openwrt.org/ticket/4061 and
+https://forum.openwrt.org/viewtopic.php?id=17063
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ arch/mips/Kconfig        |    1 -
+ arch/mips/bcm47xx/prom.c |   82 +++------------------------------------------
+ 2 files changed, 6 insertions(+), 77 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/prom.c
++++ b/arch/mips/bcm47xx/prom.c
+@@ -31,96 +31,28 @@
+ #include <asm/fw/cfe/cfe_api.h>
+ #include <asm/fw/cfe/cfe_error.h>
+ 
+-static int cfe_cons_handle;
+-
+ const char *get_system_type(void)
+ {
+ 	return "Broadcom BCM47XX";
+ }
+ 
+-void prom_putchar(char c)
+-{
+-	while (cfe_write(cfe_cons_handle, &c, 1) == 0)
+-		;
+-}
+-
+-static __init void prom_init_cfe(void)
++static __init int prom_init_cfe(void)
+ {
+ 	uint32_t cfe_ept;
+ 	uint32_t cfe_handle;
+ 	uint32_t cfe_eptseal;
+-	int argc = fw_arg0;
+-	char **envp = (char **) fw_arg2;
+-	int *prom_vec = (int *) fw_arg3;
+-
+-	/*
+-	 * Check if a loader was used; if NOT, the 4 arguments are
+-	 * what CFE gives us (handle, 0, EPT and EPTSEAL)
+-	 */
+-	if (argc < 0) {
+-		cfe_handle = (uint32_t)argc;
+-		cfe_ept = (uint32_t)envp;
+-		cfe_eptseal = (uint32_t)prom_vec;
+-	} else {
+-		if ((int)prom_vec < 0) {
+-			/*
+-			 * Old loader; all it gives us is the handle,
+-			 * so use the "known" entrypoint and assume
+-			 * the seal.
+-			 */
+-			cfe_handle = (uint32_t)prom_vec;
+-			cfe_ept = 0xBFC00500;
+-			cfe_eptseal = CFE_EPTSEAL;
+-		} else {
+-			/*
+-			 * Newer loaders bundle the handle/ept/eptseal
+-			 * Note: prom_vec is in the loader's useg
+-			 * which is still alive in the TLB.
+-			 */
+-			cfe_handle = prom_vec[0];
+-			cfe_ept = prom_vec[2];
+-			cfe_eptseal = prom_vec[3];
+-		}
+-	}
++
++	cfe_eptseal = (uint32_t) fw_arg3;
++	cfe_handle = (uint32_t) fw_arg0;
++	cfe_ept = (uint32_t) fw_arg2;
+ 
+ 	if (cfe_eptseal != CFE_EPTSEAL) {
+-		/* too early for panic to do any good */
+ 		printk(KERN_ERR "CFE's entrypoint seal doesn't match.");
+-		while (1) ;
++		return -1;
+ 	}
+ 
+ 	cfe_init(cfe_handle, cfe_ept);
+-}
+-
+-static __init void prom_init_console(void)
+-{
+-	/* Initialize CFE console */
+-	cfe_cons_handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
+-}
+-
+-static __init void prom_init_cmdline(void)
+-{
+-	static char buf[COMMAND_LINE_SIZE] __initdata;
+-
+-	/* Get the kernel command line from CFE */
+-	if (cfe_getenv("LINUX_CMDLINE", buf, COMMAND_LINE_SIZE) >= 0) {
+-		buf[COMMAND_LINE_SIZE - 1] = 0;
+-		strcpy(arcs_cmdline, buf);
+-	}
+-
+-	/* Force a console handover by adding a console= argument if needed,
+-	 * as CFE is not available anymore later in the boot process. */
+-	if ((strstr(arcs_cmdline, "console=")) == NULL) {
+-		/* Try to read the default serial port used by CFE */
+-		if ((cfe_getenv("BOOT_CONSOLE", buf, COMMAND_LINE_SIZE) < 0)
+-		    || (strncmp("uart", buf, 4)))
+-			/* Default to uart0 */
+-			strcpy(buf, "uart0");
+-
+-		/* Compute the new command line */
+-		snprintf(arcs_cmdline, COMMAND_LINE_SIZE, "%s console=ttyS%c,115200",
+-			 arcs_cmdline, buf[4]);
+-	}
++	return 0;
+ }
+ 
+ static __init void prom_init_mem(void)
+@@ -161,8 +93,6 @@ static __init void prom_init_mem(void)
+ void __init prom_init(void)
+ {
+ 	prom_init_cfe();
+-	prom_init_console();
+-	prom_init_cmdline();
+ 	prom_init_mem();
+ }
+