summaryrefslogtreecommitdiff
path: root/target/linux/brcm47xx/patches-3.3/116-MIPS-BCM47xx-Remove-CFE-console.patch
blob: 4a84b6b60ef5b0d2f620f8453b487359d7d33bd5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
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
@@ -100,7 +100,6 @@ config BCM47XX
 	select SYS_SUPPORTS_32BIT_KERNEL
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 	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();
 }