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brcm47xx: update early printk patches 

Early printk was disabled because it caused hangs on some devices, the
old patches were using the CFE console now we use the normal serial
console, it is at a constant address.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 38309
lede-17.01
Hauke Mehrtens 2013-10-06 23:55:35 +00:00
parent ebf0778721
commit b201818044
7 changed files with 234 additions and 116 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
target/linux/brcm47xx/config-3.10
View File

@ -48,7 +48,8 @@ CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
CONFIG_CPU_SUPPORTS_HIGHMEM=y
CONFIG_CSRC_R4K=y
CONFIG_DMA_NONCOHERENT=y
CONFIG_FW_CFE=y
CONFIG_EARLY_PRINTK=y
CONFIG_EARLY_PRINTK_8250=y
CONFIG_GENERIC_ATOMIC64=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
@ -148,6 +149,7 @@ CONFIG_SSB_SPROM=y
CONFIG_SWCONFIG=y
CONFIG_SYS_HAS_CPU_MIPS32_R1=y
CONFIG_SYS_HAS_CPU_MIPS32_R2=y
CONFIG_SYS_HAS_EARLY_PRINTK=y
CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y

124
target/linux/brcm47xx/patches-3.10/080-MIPS-Add-8250-16550-serial-early-printk-driver.patch Normal file
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@ -0,0 +1,124 @@
commit 0a76092a63809a0e72e3e9552acadf42869c0293
Author: Yoichi Yuasa <yuasa@linux-mips.org>
Date: Mon Feb 8 20:59:39 2010 +0900
MIPS: Add 8250/16550 serial early printk driver
Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/947/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -20,6 +20,14 @@ config EARLY_PRINTK
doesn't cooperate with an X server. You should normally say N here,
unless you want to debug such a crash.
+config EARLY_PRINTK_8250
+ bool "8250/16550 and compatible serial early printk driver"
+ depends on EARLY_PRINTK
+ default n
+ help
+ If you say Y here, it will be possible to use a 8250/16550 serial
+ port as the boot console.
+
config CMDLINE_BOOL
bool "Built-in kernel command line"
default n
--- a/arch/mips/include/asm/setup.h
+++ b/arch/mips/include/asm/setup.h
@@ -5,6 +5,14 @@
extern void setup_early_printk(void);
+#ifdef CONFIG_EARLY_PRINTK_8250
+extern void setup_8250_early_printk_port(unsigned long base,
+ unsigned int reg_shift, unsigned int timeout);
+#else
+static inline void setup_8250_early_printk_port(unsigned long base,
+ unsigned int reg_shift, unsigned int timeout) {}
+#endif
+
extern void set_handler(unsigned long offset, void *addr, unsigned long len);
extern void set_uncached_handler(unsigned long offset, void *addr, unsigned long len);
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -84,6 +84,7 @@ obj-$(CONFIG_GPIO_TXX9) += gpio_txx9.o
obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o crash.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
+obj-$(CONFIG_EARLY_PRINTK_8250) += early_printk_8250.o
obj-$(CONFIG_SPINLOCK_TEST) += spinlock_test.o
obj-$(CONFIG_MIPS_MACHINE) += mips_machine.o
--- /dev/null
+++ b/arch/mips/kernel/early_printk_8250.c
@@ -0,0 +1,66 @@
+/*
+ * 8250/16550-type serial ports prom_putchar()
+ *
+ * Copyright (C) 2010 Yoichi Yuasa <yuasa@linux-mips.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <linux/io.h>
+#include <linux/serial_core.h>
+#include <linux/serial_reg.h>
+
+static void __iomem *serial8250_base;
+static unsigned int serial8250_reg_shift;
+static unsigned int serial8250_tx_timeout;
+
+void setup_8250_early_printk_port(unsigned long base, unsigned int reg_shift,
+ unsigned int timeout)
+{
+ serial8250_base = (void __iomem *)base;
+ serial8250_reg_shift = reg_shift;
+ serial8250_tx_timeout = timeout;
+}
+
+static inline u8 serial_in(int offset)
+{
+ return readb(serial8250_base + (offset << serial8250_reg_shift));
+}
+
+static inline void serial_out(int offset, char value)
+{
+ writeb(value, serial8250_base + (offset << serial8250_reg_shift));
+}
+
+void prom_putchar(char c)
+{
+ unsigned int timeout;
+ int status, bits;
+
+ if (!serial8250_base)
+ return;
+
+ timeout = serial8250_tx_timeout;
+ bits = UART_LSR_TEMT | UART_LSR_THRE;
+
+ do {
+ status = serial_in(UART_LSR);
+
+ if (--timeout == 0)
+ break;
+ } while ((status & bits) != bits);
+
+ if (timeout)
+ serial_out(UART_TX, c);
+}

88
target/linux/brcm47xx/patches-3.10/116-MIPS-BCM47xx-Remove-CFE-console.patch → target/linux/brcm47xx/patches-3.10/081-MIPS-BCM47XX-Remove-CFE-support.patch
View File

@ -1,22 +1,30 @@
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
commit 808fe9c2fa81a6b3e20fe813d5410e7fd6606efa
Author: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun Jul 18 15:11:26 2010 +0200
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(-)
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
@@ -118,7 +118,6 @@ config BCM47XX
@@ -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
@ -26,16 +34,20 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
--- a/arch/mips/bcm47xx/prom.c
+++ b/arch/mips/bcm47xx/prom.c
@@ -35,8 +35,6 @@
@@ -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";
const char *get_system_type(void)
@@ -52,89 +50,23 @@ __init void bcm47xx_set_system_type(u16
@@ -52,91 +49,6 @@ __init void bcm47xx_set_system_type(u16
chip_id);
}
@ -46,11 +58,10 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
-}
-
-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;
-{
- 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;
@ -84,19 +95,14 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
- 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) {
-
- if (cfe_eptseal != CFE_EPTSEAL) {
- /* too early for panic to do any good */
printk(KERN_ERR "CFE's entrypoint seal doesn't match.");
- printk(KERN_ERR "CFE's entrypoint seal doesn't match.");
- while (1) ;
+ return -1;
}
cfe_init(cfe_handle, cfe_ept);
- }
-
- cfe_init(cfe_handle, cfe_ept);
-}
-
-static __init void prom_init_console(void)
@ -128,14 +134,16 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
- snprintf(arcs_cmdline, COMMAND_LINE_SIZE, "%s console=ttyS%c,115200",
- arcs_cmdline, buf[4]);
- }
+ return 0;
}
-}
-
static __init void prom_init_mem(void)
@@ -185,8 +117,6 @@ 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_cfe();
- prom_init_console();
- prom_init_cmdline();
prom_init_mem();

53
target/linux/brcm47xx/patches-3.10/082-MIPS-BCM47XX-add-EARLY_PRINTK_8250-support.patch Normal file
View File

@ -0,0 +1,53 @@
commit 22250a38f970c173acb1b3fb30e6dce1430f697b
Author: Hauke Mehrtens <hauke@hauke-m.de>
Date: Thu Sep 19 22:48:35 2013 +0200
MIPS: BCM47XX: add EARLY_PRINTK_8250 support
The BCM47xx SoCs have a 8250 serial compatible console at address
0x18000300 and an other at 0x18000400. On most devices 0x18000300 is
wired to some pins on the board, we should use that.
This is the smae for the AI (bcma) and the SB (ssb) bus, this is some
offset on the chip common core.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -117,6 +117,8 @@ config BCM47XX
select NO_EXCEPT_FILL
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
+ select SYS_HAS_EARLY_PRINTK
+ select EARLY_PRINTK_8250 if EARLY_PRINTK
help
Support for BCM47XX based boards
--- a/arch/mips/bcm47xx/prom.c
+++ b/arch/mips/bcm47xx/prom.c
@@ -28,6 +28,8 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
+#include <linux/ssb/ssb_driver_chipcommon.h>
+#include <linux/ssb/ssb_regs.h>
#include <linux/smp.h>
#include <asm/bootinfo.h>
#include <bcm47xx.h>
@@ -94,9 +96,16 @@ static __init void prom_init_mem(void)
add_memory_region(0, mem, BOOT_MEM_RAM);
}
+/*
+ * This is the first serial on the chip common core, it is at this position
+ * for sb (ssb) and ai (bcma) bus.
+ */
+#define BCM47XX_SERIAL_ADDR (SSB_ENUM_BASE + SSB_CHIPCO_UART0_DATA)
+
void __init prom_init(void)
{
prom_init_mem();
+ setup_8250_early_printk_port(CKSEG1ADDR(BCM47XX_SERIAL_ADDR), 0, 0);
}
void __init prom_free_prom_memory(void)

69
target/linux/brcm47xx/patches-3.10/114-MIPS-BCM47xx-Setup-and-register-serial-early.patch
View File

@ -1,69 +0,0 @@
From 9be402f069cc259ad5795b77567d66c4e7f6bef6 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 4/6] 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.
This patch has been in OpenWRT for a long time.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
arch/mips/bcm47xx/setup.c | 39 ++++++++++++++++++++++++++++++++++++++-
1 files changed, 38 insertions(+), 1 deletions(-)
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -31,6 +31,8 @@
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma_soc.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
#include <asm/bootinfo.h>
#include <asm/prom.h>
#include <asm/reboot.h>
@@ -123,6 +125,31 @@ static int bcm47xx_get_invariants(struct
return 0;
}
+#ifdef CONFIG_SERIAL_8250
+static void __init bcm47xx_early_serial_setup(struct ssb_mipscore *mcore)
+{
+ int i;
+
+ 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");
+}
+#endif
+
static void __init bcm47xx_register_ssb(void)
{
int err;
@@ -152,6 +179,10 @@ static void __init bcm47xx_register_ssb(
memcpy(&mcore->serial_ports[1], &port, sizeof(port));
}
}
+
+#ifdef CONFIG_SERIAL_8250
+ bcm47xx_early_serial_setup(mcore);
+#endif
}
#endif

10
target/linux/brcm47xx/patches-3.10/830-huawei_e970_support.patch
View File

@ -1,14 +1,14 @@
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -33,6 +33,7 @@
@@ -31,6 +31,7 @@
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma_soc.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
+#include <linux/gpio_wdt.h>
#include <asm/bootinfo.h>
#include <asm/prom.h>
#include <asm/reboot.h>
@@ -260,6 +261,33 @@ void __init plat_mem_setup(void)
@@ -229,6 +230,33 @@ void __init plat_mem_setup(void)
mips_set_machine_name(bcm47xx_board_get_name());
}
@ -42,7 +42,7 @@
static int __init bcm47xx_register_bus_complete(void)
{
switch (bcm47xx_bus_type) {
@@ -274,6 +302,8 @@ static int __init bcm47xx_register_bus_c
@@ -243,6 +271,8 @@ static int __init bcm47xx_register_bus_c
break;
#endif
}

2
target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch
View File

@ -1,6 +1,6 @@
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -123,6 +123,10 @@ static int bcm47xx_get_invariants(struct
@@ -121,6 +121,10 @@ static int bcm47xx_get_invariants(struct
if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);