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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2008-07-29 22:10:08 +0900
committerRalf Baechle <ralf@linux-mips.org>2008-07-30 21:54:41 +0100
commite352953ce00bb870124e9054dbbbda2262f9269c (patch)
tree76297cc5749b91bec76d75f4520d88add8ca3efc /arch/mips
parent7779a5e07d33fe316fe468e7afe7975fb686a831 (diff)
downloadlinux-e352953ce00bb870124e9054dbbbda2262f9269c.tar.gz
[MIPS] TXx9: Support early_printk
Kill jmr3927-specific prom_putchar and add txx9-generic prom_putchar to support early_printk. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/txx9/Kconfig3
-rw-r--r--arch/mips/txx9/generic/setup.c31
-rw-r--r--arch/mips/txx9/jmr3927/prom.c17
-rw-r--r--arch/mips/txx9/rbtx4927/prom.c1
-rw-r--r--arch/mips/txx9/rbtx4938/prom.c1
5 files changed, 37 insertions, 16 deletions
diff --git a/arch/mips/txx9/Kconfig b/arch/mips/txx9/Kconfig
index 6de4c5aa92be..9b14db2ce204 100644
--- a/arch/mips/txx9/Kconfig
+++ b/arch/mips/txx9/Kconfig
@@ -30,6 +30,7 @@ config SOC_TX3927
select IRQ_TXX9
select SWAP_IO_SPACE
select SYS_HAS_CPU_TX39XX
+ select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
select SYS_SUPPORTS_BIG_ENDIAN
@@ -49,6 +50,7 @@ config SOC_TX4927
select PCI_TX4927
select SWAP_IO_SPACE
select SYS_HAS_CPU_TX49XX
+ select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
@@ -70,6 +72,7 @@ config SOC_TX4938
select PCI_TX4927
select SWAP_IO_SPACE
select SYS_HAS_CPU_TX49XX
+ select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c
index 94ce1a5c38a4..1bc57d0f4c5c 100644
--- a/arch/mips/txx9/generic/setup.c
+++ b/arch/mips/txx9/generic/setup.c
@@ -271,6 +271,37 @@ void __init txx9_sio_init(unsigned long baseaddr, int irq,
#endif /* CONFIG_SERIAL_TXX9 */
}
+#ifdef CONFIG_EARLY_PRINTK
+static void __init null_prom_putchar(char c)
+{
+}
+void (*txx9_prom_putchar)(char c) __initdata = null_prom_putchar;
+
+void __init prom_putchar(char c)
+{
+ txx9_prom_putchar(c);
+}
+
+static void __iomem *early_txx9_sio_port;
+
+static void __init early_txx9_sio_putchar(char c)
+{
+#define TXX9_SICISR 0x0c
+#define TXX9_SITFIFO 0x1c
+#define TXX9_SICISR_TXALS 0x00000002
+ while (!(__raw_readl(early_txx9_sio_port + TXX9_SICISR) &
+ TXX9_SICISR_TXALS))
+ ;
+ __raw_writel(c, early_txx9_sio_port + TXX9_SITFIFO);
+}
+
+void __init txx9_sio_putchar_init(unsigned long baseaddr)
+{
+ early_txx9_sio_port = ioremap(baseaddr, 0x24);
+ txx9_prom_putchar = early_txx9_sio_putchar;
+}
+#endif /* CONFIG_EARLY_PRINTK */
+
/* wrappers */
void __init plat_mem_setup(void)
{
diff --git a/arch/mips/txx9/jmr3927/prom.c b/arch/mips/txx9/jmr3927/prom.c
index 23df38c1490e..70c4c8ec3e84 100644
--- a/arch/mips/txx9/jmr3927/prom.c
+++ b/arch/mips/txx9/jmr3927/prom.c
@@ -41,22 +41,6 @@
#include <asm/txx9/generic.h>
#include <asm/txx9/jmr3927.h>
-#define TIMEOUT 0xffffff
-
-void
-prom_putchar(char c)
-{
- int i = 0;
-
- do {
- i++;
- if (i>TIMEOUT)
- break;
- } while (!(tx3927_sioptr(1)->cisr & TXx927_SICISR_TXALS));
- tx3927_sioptr(1)->tfifo = c;
- return;
-}
-
void __init jmr3927_prom_init(void)
{
/* CCFG */
@@ -65,4 +49,5 @@ void __init jmr3927_prom_init(void)
prom_init_cmdline();
add_memory_region(0, JMR3927_SDRAM_SIZE, BOOT_MEM_RAM);
+ txx9_sio_putchar_init(TX3927_SIO_REG(1));
}
diff --git a/arch/mips/txx9/rbtx4927/prom.c b/arch/mips/txx9/rbtx4927/prom.c
index 5c0de54ebdd2..1dc0a5b1956b 100644
--- a/arch/mips/txx9/rbtx4927/prom.c
+++ b/arch/mips/txx9/rbtx4927/prom.c
@@ -38,4 +38,5 @@ void __init rbtx4927_prom_init(void)
{
prom_init_cmdline();
add_memory_region(0, tx4927_get_mem_size(), BOOT_MEM_RAM);
+ txx9_sio_putchar_init(TX4927_SIO_REG(0) & 0xfffffffffULL);
}
diff --git a/arch/mips/txx9/rbtx4938/prom.c b/arch/mips/txx9/rbtx4938/prom.c
index ee189519ce5a..d73123cd2ab9 100644
--- a/arch/mips/txx9/rbtx4938/prom.c
+++ b/arch/mips/txx9/rbtx4938/prom.c
@@ -22,4 +22,5 @@ void __init rbtx4938_prom_init(void)
prom_init_cmdline();
#endif
add_memory_region(0, tx4938_get_mem_size(), BOOT_MEM_RAM);
+ txx9_sio_putchar_init(TX4938_SIO_REG(0) & 0xfffffffffULL);
}