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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-09 16:08:04 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-09 16:08:04 +0900
commitde390bba797aa9a554bc1769b6a8771605854d79 (patch)
treece95610d4a70ec0a7307a30cfd1a66fdf0c901ab /arch/mips/mti-sead3/sead3-console.c
parent50e0d10232db05c6776afcf6098459bff47e8b15 (diff)
parent382fc33b4a04e2dde89b4c69a6880e0c7d9761e2 (diff)
downloadop-kernel-dev-de390bba797aa9a554bc1769b6a8771605854d79.zip
op-kernel-dev-de390bba797aa9a554bc1769b6a8771605854d79.tar.gz
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS update from Ralf Baechle: "This is the MIPS update for 3.7. A fair chunk of them are platform updates to the Cavium Octeon SOC (which involves machine generated header files of considerable size), Atheros ATH79xx, RMI aka Netlogic aka Broadcom XLP, Broadcom BCM63xx platforms. Support for the commercial MIPS simulator MIPSsim has been removed as MIPS Technologies is shifting away from this product and Qemu is offering various more powerful platforms. The generic MIPS code can now also probe for no-execute / write-only TLB features implemented without the full SmartMIPS extension as permitted by the latest MIPS processor architecture. Lots of small changes to generic code." * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (78 commits) MIPS: ath79: Fix CPU/DDR frequency calculation for SRIF PLLs MIPS: ath79: use correct fractional dividers for {CPU,DDR}_PLL on AR934x MIPS: BCM63XX: Properly handle mac address octet overflow MIPS: Kconfig: Avoid build errors by hiding USE_OF from the user. MIPS: Replace `-' in defconfig filename wth `_' for consistency. MIPS: Wire kcmp syscall. MIPS: MIPSsim: Remove the MIPSsim platform. MIPS: NOTIFY_RESUME is not needed in TIF masks MIPS: Merge the identical "return from syscall" per-ABI code MIPS: Unobfuscate _TIF..._MASK MIPS: Prevent hitting do_notify_resume() with !user_mode(regs). MIPS: Replace 'kernel_uses_smartmips_rixi' with 'cpu_has_rixi'. MIPS: Add base architecture support for RI and XI. MIPS: Optimise TLB handlers for MIPS32/64 R2 cores. MIPS: uasm: Add INS and EXT instructions. MIPS: Avoid pipeline stalls on some MIPS32R2 cores. MIPS: Make VPE count to be one-based. MIPS: Add new end of interrupt functionality for GIC. MIPS: Add EIC support for GIC. MIPS: Code clean-ups for the GIC. ...
Diffstat (limited to 'arch/mips/mti-sead3/sead3-console.c')
-rw-r--r--arch/mips/mti-sead3/sead3-console.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/mips/mti-sead3/sead3-console.c b/arch/mips/mti-sead3/sead3-console.c
new file mode 100644
index 0000000..b367391
--- /dev/null
+++ b/arch/mips/mti-sead3/sead3-console.c
@@ -0,0 +1,46 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ */
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/serial_reg.h>
+#include <linux/io.h>
+
+#define SEAD_UART1_REGS_BASE 0xbf000800 /* ttyS1 = DB9 port */
+#define SEAD_UART0_REGS_BASE 0xbf000900 /* ttyS0 = USB port */
+#define PORT(base_addr, offset) ((unsigned int __iomem *)(base_addr+(offset)*4))
+
+static char console_port = 1;
+
+static inline unsigned int serial_in(int offset, unsigned int base_addr)
+{
+ return __raw_readl(PORT(base_addr, offset)) & 0xff;
+}
+
+static inline void serial_out(int offset, int value, unsigned int base_addr)
+{
+ __raw_writel(value, PORT(base_addr, offset));
+}
+
+void __init prom_init_early_console(char port)
+{
+ console_port = port;
+}
+
+int prom_putchar(char c)
+{
+ unsigned int base_addr;
+
+ base_addr = console_port ? SEAD_UART1_REGS_BASE : SEAD_UART0_REGS_BASE;
+
+ while ((serial_in(UART_LSR, base_addr) & UART_LSR_THRE) == 0)
+ ;
+
+ serial_out(UART_TX, c, base_addr);
+
+ return 1;
+}
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