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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 17:48:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 17:48:14 -0700
commit2ca7d674d7ab2220707b2ada0b690c0e7c95e7ac (patch)
tree9c0927ed1d540e5fd704c1f82689870786514655 /arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c
parent2195d2818c37bdf263865f1e9effccdd9fc5f9d4 (diff)
parent87d721ad7a37b7650dd710c88dd5c6a5bf9fe996 (diff)
downloadop-kernel-dev-2ca7d674d7ab2220707b2ada0b690c0e7c95e7ac.zip
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Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (257 commits) [ARM] Update mach-types ARM: 5636/1: Move vendor enum to AMBA include ARM: Fix pfn_valid() for sparse memory [ARM] orion5x: Add LaCie NAS 2Big Network support [ARM] pxa/sharpsl_pm: zaurus c3000 aka spitz: fix resume ARM: 5686/1: at91: Correct AC97 reset line in at91sam9263ek board ARM: 5640/1: This patch modifies the support of AC97 on the at91sam9263 ek board ARM: 5689/1: Update default config of HP Jornada 700-series machines ARM: 5691/1: fix cache aliasing issues between kmap() and kmap_atomic() with highmem ARM: 5688/1: ks8695_serial: disable_irq() lockup ARM: 5687/1: fix an oops with highmem ARM: 5684/1: Add nuc960 platform to w90x900 ARM: 5683/1: Add nuc950 platform to w90x900 ARM: 5682/1: Add cpu.c and dev.c and modify some files of w90p910 platform ARM: 5626/1: add suspend/resume functions to amba-pl011 serial driver ARM: 5625/1: fix hard coded 4K resource size in amba bus detection MMC: MMCI: convert realview MMC to use gpiolib ARM: 5685/1: Make MMCI driver compile without gpiolib ARM: implement highpte ARM: Show FIQ in /proc/interrupts on CONFIG_FIQ ... Fix up trivial conflict in arch/arm/kernel/signal.c. It was due to the TIF_NOTIFY_RESUME addition in commit d0420c83f ("KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures") and follow-ups.
Diffstat (limited to 'arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c')
-rw-r--r--arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c b/arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c
new file mode 100644
index 0000000..2671d88
--- /dev/null
+++ b/arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c
@@ -0,0 +1,124 @@
+/*****************************************************************************
+* Copyright 2003 - 2008 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <csp/stdint.h>
+#include <mach/csp/chipcHw_def.h>
+#include <mach/csp/chipcHw_inline.h>
+#include <csp/intcHw.h>
+#include <csp/cache.h>
+
+/* ---- Private Constants and Types --------------------------------------- */
+/* ---- Private Variables ------------------------------------------------- */
+void chipcHw_reset_run_from_aram(void);
+
+typedef void (*RUNFUNC) (void);
+
+/****************************************************************************/
+/**
+* @brief warmReset
+*
+* @note warmReset configures the clocks which are not reset back to the state
+* required to execute on reset. To do so we need to copy the code into internal
+* memory to change the ARM clock while we are not executing from DDR.
+*/
+/****************************************************************************/
+void chipcHw_reset(uint32_t mask)
+{
+ int i = 0;
+ RUNFUNC runFunc = (RUNFUNC) (unsigned long)MM_ADDR_IO_ARAM;
+
+ /* Disable all interrupts */
+ intcHw_irq_disable(INTCHW_INTC0, 0xffffffff);
+ intcHw_irq_disable(INTCHW_INTC1, 0xffffffff);
+ intcHw_irq_disable(INTCHW_SINTC, 0xffffffff);
+
+ {
+ REG_LOCAL_IRQ_SAVE;
+ if (mask & chipcHw_REG_SOFT_RESET_CHIP_SOFT) {
+ chipcHw_softReset(chipcHw_REG_SOFT_RESET_CHIP_SOFT);
+ }
+ /* Bypass the PLL clocks before reboot */
+ pChipcHw->UARTClock |= chipcHw_REG_PLL_CLOCK_BYPASS_SELECT;
+ pChipcHw->SPIClock |= chipcHw_REG_PLL_CLOCK_BYPASS_SELECT;
+
+ /* Copy the chipcHw_warmReset_run_from_aram function into ARAM */
+ do {
+ ((uint32_t *) MM_IO_BASE_ARAM)[i] =
+ ((uint32_t *) &chipcHw_reset_run_from_aram)[i];
+ i++;
+ } while (((uint32_t *) MM_IO_BASE_ARAM)[i - 1] != 0xe1a0f00f); /* 0xe1a0f00f == asm ("mov r15, r15"); */
+
+ CSP_CACHE_FLUSH_ALL;
+
+ /* run the function from ARAM */
+ runFunc();
+
+ /* Code will never get here, but include it to balance REG_LOCAL_IRQ_SAVE above */
+ REG_LOCAL_IRQ_RESTORE;
+ }
+}
+
+/* This function must run from internal memory */
+void chipcHw_reset_run_from_aram(void)
+{
+/* Make sure, pipeline is filled with instructions coming from ARAM */
+__asm (" nop \n\t"
+ " nop \n\t"
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ " MRC p15,#0x0,r0,c1,c0,#0 \n\t"
+ " BIC r0,r0,#0xd \n\t"
+ " MCR p15,#0x0,r0,c1,c0,#0 \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+#endif
+ " nop \n\t"
+ " nop \n\t"
+/* Bypass the ARM clock and switch to XTAL clock */
+ " MOV r2,#0x80000000 \n\t"
+ " LDR r3,[r2,#8] \n\t"
+ " ORR r3,r3,#0x20000 \n\t"
+ " STR r3,[r2,#8] \n\t"
+
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+ " nop \n\t"
+/* Issue reset */
+ " MOV r3,#0x2 \n\t"
+ " STR r3,[r2,#0x80] \n\t"
+/* End here */
+ " MOV pc,pc \n\t");
+/* 0xe1a0f00f == asm ("mov r15, r15"); */
+}
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