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>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5888/

1 files changed, 0 insertions, 91 deletions

diff --git a/arch/mips/bcm47xx/prom.c b/arch/mips/bcm47xx/prom.c
index 53b9a3fbc8f5..99c3ce2d5b98 100644
--- 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)
                  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();
 }