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-rw-r--r--target/linux/brcm47xx/patches-3.10/081-MIPS-BCM47XX-Remove-CFE-support.patch151
1 files changed, 151 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.10/081-MIPS-BCM47XX-Remove-CFE-support.patch b/target/linux/brcm47xx/patches-3.10/081-MIPS-BCM47XX-Remove-CFE-support.patch
new file mode 100644
index 0000000000..1537db5158
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.10/081-MIPS-BCM47XX-Remove-CFE-support.patch
@@ -0,0 +1,151 @@
+commit 808fe9c2fa81a6b3e20fe813d5410e7fd6606efa
+Author: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun Jul 18 15:11:26 2010 +0200
+
+ MIPS: BCM47XX: Remove CFE support
+
+ bcm47xx only uses the CFE code for early print to a console, but that
+ is also possible with a early print serial 8250 driver.
+
+ The CFE api init causes hangs somewhere in prom_init_cfe() on some
+ devices like the Buffalo WHR-HP-G54 and the Asus WL-520GU.
+ This was reported in https://dev.openwrt.org/ticket/4061 and
+ https://forum.openwrt.org/viewtopic.php?id=17063
+
+ This will remove all the CFE handling code from bcm47xx.
+
+ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -112,13 +112,11 @@ config BCM47XX
+ select CEVT_R4K
+ select CSRC_R4K
+ select DMA_NONCOHERENT
+- select FW_CFE
+ select HW_HAS_PCI
+ select IRQ_CPU
+ select NO_EXCEPT_FILL
+ select SYS_SUPPORTS_32BIT_KERNEL
+ select SYS_SUPPORTS_LITTLE_ENDIAN
+- select SYS_HAS_EARLY_PRINTK
+ help
+ Support for BCM47XX based boards
+
+--- a/arch/mips/bcm47xx/prom.c
++++ b/arch/mips/bcm47xx/prom.c
+@@ -30,12 +30,9 @@
+ #include <linux/spinlock.h>
+ #include <linux/smp.h>
+ #include <asm/bootinfo.h>
+-#include <asm/fw/cfe/cfe_api.h>
+-#include <asm/fw/cfe/cfe_error.h>
+ #include <bcm47xx.h>
+ #include <bcm47xx_board.h>
+
+-static int cfe_cons_handle;
+
+ static char bcm47xx_system_type[20] = "Broadcom BCM47XX";
+
+@@ -52,91 +49,6 @@ __init void bcm47xx_set_system_type(u16
+ chip_id);
+ }
+
+-void prom_putchar(char c)
+-{
+- while (cfe_write(cfe_cons_handle, &c, 1) == 0)
+- ;
+-}
+-
+-static __init void 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];
+- }
+- }
+-
+- 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) ;
+- }
+-
+- 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]);
+- }
+-}
+-
+ static __init void prom_init_mem(void)
+ {
+ unsigned long mem;
+@@ -184,9 +96,6 @@ static __init void prom_init_mem(void)
+
+ void __init prom_init(void)
+ {
+- prom_init_cfe();
+- prom_init_console();
+- prom_init_cmdline();
+ prom_init_mem();
+ }
+