fiq_debugger: move into drivers/staging/android/fiq_debugger/

Move fiq_debugger into drivers/staging/android/fiq_debugger/ to
allow for sharing between ARM and ARM64.

Change-Id: I6ca5e8b7e3d000f57da3234260261c5592cef2a8
Signed-off-by: Colin Cross <ccross@android.com>

4 files changed, 0 insertions, 1517 deletions

diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig
index 992d4046bb8a..ce01364a96e3 100644
--- a/arch/arm/common/Kconfig
+++ b/arch/arm/common/Kconfig
@@ -21,49 +21,3 @@ config SHARP_SCOOP
 config FIQ_GLUE
 	bool
 	select FIQ
-
-config FIQ_DEBUGGER
-	bool "FIQ Mode Serial Debugger"
-	select FIQ
-	select FIQ_GLUE
-	default n
-	help
-	  The FIQ serial debugger can accept commands even when the
-	  kernel is unresponsive due to being stuck with interrupts
-	  disabled.
-
-
-config FIQ_DEBUGGER_NO_SLEEP
-	bool "Keep serial debugger active"
-	depends on FIQ_DEBUGGER
-	default n
-	help
-	  Enables the serial debugger at boot. Passing
-	  fiq_debugger.no_sleep on the kernel commandline will
-	  override this config option.
-
-config FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
-	bool "Don't disable wakeup IRQ when debugger is active"
-	depends on FIQ_DEBUGGER
-	default n
-	help
-	  Don't disable the wakeup irq when enabling the uart clock.  This will
-	  cause extra interrupts, but it makes the serial debugger usable with
-	  on some MSM radio builds that ignore the uart clock request in power
-	  collapse.
-
-config FIQ_DEBUGGER_CONSOLE
-	bool "Console on FIQ Serial Debugger port"
-	depends on FIQ_DEBUGGER
-	default n
-	help
-	  Enables a console so that printk messages are displayed on
-	  the debugger serial port as the occur.
-
-config FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
-	bool "Put the FIQ debugger into console mode by default"
-	depends on FIQ_DEBUGGER_CONSOLE
-	default n
-	help
-	  If enabled, this puts the fiq debugger into console mode by default.
-	  Otherwise, the fiq debugger will start out in debug mode.
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index 384abdc09b62..0a0821fa9a90 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -4,7 +4,6 @@
 
 obj-y				+= firmware.o
 
-obj-$(CONFIG_FIQ_DEBUGGER)	+= fiq_debugger.o
 obj-$(CONFIG_FIQ_GLUE)		+= fiq_glue.o fiq_glue_setup.o
 obj-$(CONFIG_ICST)		+= icst.o
 obj-$(CONFIG_SA1111)		+= sa1111.o
diff --git a/arch/arm/common/fiq_debugger.c b/arch/arm/common/fiq_debugger.c
deleted file mode 100644
index 65b943c76300..000000000000
--- a/arch/arm/common/fiq_debugger.c
+++ /dev/null
@@ -1,1376 +0,0 @@
-/*
- * arch/arm/common/fiq_debugger.c
- *
- * Serial Debugger Interface accessed through an FIQ interrupt.
- *
- * Copyright (C) 2008 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- */
-
-#include <stdarg.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/console.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/kernel_stat.h>
-#include <linux/kmsg_dump.h>
-#include <linux/irq.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/smp.h>
-#include <linux/timer.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/wakelock.h>
-
-#include <asm/fiq_debugger.h>
-#include <asm/fiq_glue.h>
-#include <asm/stacktrace.h>
-
-#include <linux/uaccess.h>
-
-#include "fiq_debugger_ringbuf.h"
-
-#define DEBUG_MAX 64
-#define MAX_UNHANDLED_FIQ_COUNT 1000000
-
-#define MAX_FIQ_DEBUGGER_PORTS 4
-
-#define THREAD_INFO(sp) ((struct thread_info *) \
-		((unsigned long)(sp) & ~(THREAD_SIZE - 1)))
-
-struct fiq_debugger_state {
-	struct fiq_glue_handler handler;
-
-	int fiq;
-	int uart_irq;
-	int signal_irq;
-	int wakeup_irq;
-	bool wakeup_irq_no_set_wake;
-	struct clk *clk;
-	struct fiq_debugger_pdata *pdata;
-	struct platform_device *pdev;
-
-	char debug_cmd[DEBUG_MAX];
-	int debug_busy;
-	int debug_abort;
-
-	char debug_buf[DEBUG_MAX];
-	int debug_count;
-
-	bool no_sleep;
-	bool debug_enable;
-	bool ignore_next_wakeup_irq;
-	struct timer_list sleep_timer;
-	spinlock_t sleep_timer_lock;
-	bool uart_enabled;
-	struct wake_lock debugger_wake_lock;
-	bool console_enable;
-	int current_cpu;
-	atomic_t unhandled_fiq_count;
-	bool in_fiq;
-
-	struct work_struct work;
-	spinlock_t work_lock;
-	char work_cmd[DEBUG_MAX];
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-	spinlock_t console_lock;
-	struct console console;
-	struct tty_port tty_port;
-	struct fiq_debugger_ringbuf *tty_rbuf;
-	bool syslog_dumping;
-#endif
-
-	unsigned int last_irqs[NR_IRQS];
-	unsigned int last_local_timer_irqs[NR_CPUS];
-};
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-struct tty_driver *fiq_tty_driver;
-#endif
-
-#ifdef CONFIG_FIQ_DEBUGGER_NO_SLEEP
-static bool initial_no_sleep = true;
-#else
-static bool initial_no_sleep;
-#endif
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
-static bool initial_debug_enable = true;
-static bool initial_console_enable = true;
-#else
-static bool initial_debug_enable;
-static bool initial_console_enable;
-#endif
-
-static bool fiq_kgdb_enable;
-
-module_param_named(no_sleep, initial_no_sleep, bool, 0644);
-module_param_named(debug_enable, initial_debug_enable, bool, 0644);
-module_param_named(console_enable, initial_console_enable, bool, 0644);
-module_param_named(kgdb_enable, fiq_kgdb_enable, bool, 0644);
-
-#ifdef CONFIG_FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
-static inline void enable_wakeup_irq(struct fiq_debugger_state *state) {}
-static inline void disable_wakeup_irq(struct fiq_debugger_state *state) {}
-#else
-static inline void enable_wakeup_irq(struct fiq_debugger_state *state)
-{
-	if (state->wakeup_irq < 0)
-		return;
-	enable_irq(state->wakeup_irq);
-	if (!state->wakeup_irq_no_set_wake)
-		enable_irq_wake(state->wakeup_irq);
-}
-static inline void disable_wakeup_irq(struct fiq_debugger_state *state)
-{
-	if (state->wakeup_irq < 0)
-		return;
-	disable_irq_nosync(state->wakeup_irq);
-	if (!state->wakeup_irq_no_set_wake)
-		disable_irq_wake(state->wakeup_irq);
-}
-#endif
-
-static bool inline debug_have_fiq(struct fiq_debugger_state *state)
-{
-	return (state->fiq >= 0);
-}
-
-static void debug_force_irq(struct fiq_debugger_state *state)
-{
-	unsigned int irq = state->signal_irq;
-
-	if (WARN_ON(!debug_have_fiq(state)))
-		return;
-	if (state->pdata->force_irq) {
-		state->pdata->force_irq(state->pdev, irq);
-	} else {
-		struct irq_chip *chip = irq_get_chip(irq);
-		if (chip && chip->irq_retrigger)
-			chip->irq_retrigger(irq_get_irq_data(irq));
-	}
-}
-
-static void debug_uart_enable(struct fiq_debugger_state *state)
-{
-	if (state->clk)
-		clk_enable(state->clk);
-	if (state->pdata->uart_enable)
-		state->pdata->uart_enable(state->pdev);
-}
-
-static void debug_uart_disable(struct fiq_debugger_state *state)
-{
-	if (state->pdata->uart_disable)
-		state->pdata->uart_disable(state->pdev);
-	if (state->clk)
-		clk_disable(state->clk);
-}
-
-static void debug_uart_flush(struct fiq_debugger_state *state)
-{
-	if (state->pdata->uart_flush)
-		state->pdata->uart_flush(state->pdev);
-}
-
-static void debug_putc(struct fiq_debugger_state *state, char c)
-{
-	state->pdata->uart_putc(state->pdev, c);
-}
-
-static void debug_puts(struct fiq_debugger_state *state, char *s)
-{
-	unsigned c;
-	while ((c = *s++)) {
-		if (c == '\n')
-			debug_putc(state, '\r');
-		debug_putc(state, c);
-	}
-}
-
-static void debug_prompt(struct fiq_debugger_state *state)
-{
-	debug_puts(state, "debug> ");
-}
-
-static void dump_kernel_log(struct fiq_debugger_state *state)
-{
-	char buf[512];
-	size_t len;
-	struct kmsg_dumper dumper = { .active = true };
-
-
-	kmsg_dump_rewind_nolock(&dumper);
-	while (kmsg_dump_get_line_nolock(&dumper, true, buf,
-					 sizeof(buf) - 1, &len)) {
-		buf[len] = 0;
-		debug_puts(state, buf);
-	}
-}
-
-static char *mode_name(unsigned cpsr)
-{
-	switch (cpsr & MODE_MASK) {
-	case USR_MODE: return "USR";
-	case FIQ_MODE: return "FIQ";
-	case IRQ_MODE: return "IRQ";
-	case SVC_MODE: return "SVC";
-	case ABT_MODE: return "ABT";
-	case UND_MODE: return "UND";
-	case SYSTEM_MODE: return "SYS";
-	default: return "???";
-	}
-}
-
-static int debug_printf(void *cookie, const char *fmt, ...)
-{
-	struct fiq_debugger_state *state = cookie;
-	char buf[256];
-	va_list ap;
-
-	va_start(ap, fmt);
-	vsnprintf(buf, sizeof(buf), fmt, ap);
-	va_end(ap);
-
-	debug_puts(state, buf);
-	return state->debug_abort;
-}
-
-/* Safe outside fiq context */
-static int debug_printf_nfiq(void *cookie, const char *fmt, ...)
-{
-	struct fiq_debugger_state *state = cookie;
-	char buf[256];
-	va_list ap;
-	unsigned long irq_flags;
-
-	va_start(ap, fmt);
-	vsnprintf(buf, 128, fmt, ap);
-	va_end(ap);
-
-	local_irq_save(irq_flags);
-	debug_puts(state, buf);
-	debug_uart_flush(state);
-	local_irq_restore(irq_flags);
-	return state->debug_abort;
-}
-
-static void dump_regs(struct fiq_debugger_state *state, unsigned *regs)
-{
-	debug_printf(state, " r0 %08x  r1 %08x  r2 %08x  r3 %08x\n",
-			regs[0], regs[1], regs[2], regs[3]);
-	debug_printf(state, " r4 %08x  r5 %08x  r6 %08x  r7 %08x\n",
-			regs[4], regs[5], regs[6], regs[7]);
-	debug_printf(state, " r8 %08x  r9 %08x r10 %08x r11 %08x  mode %s\n",
-			regs[8], regs[9], regs[10], regs[11],
-			mode_name(regs[16]));
-	if ((regs[16] & MODE_MASK) == USR_MODE)
-		debug_printf(state, " ip %08x  sp %08x  lr %08x  pc %08x  "
-				"cpsr %08x\n", regs[12], regs[13], regs[14],
-				regs[15], regs[16]);
-	else
-		debug_printf(state, " ip %08x  sp %08x  lr %08x  pc %08x  "
-				"cpsr %08x  spsr %08x\n", regs[12], regs[13],
-				regs[14], regs[15], regs[16], regs[17]);
-}
-
-struct mode_regs {
-	unsigned long sp_svc;
-	unsigned long lr_svc;
-	unsigned long spsr_svc;
-
-	unsigned long sp_abt;
-	unsigned long lr_abt;
-	unsigned long spsr_abt;
-
-	unsigned long sp_und;
-	unsigned long lr_und;
-	unsigned long spsr_und;
-
-	unsigned long sp_irq;
-	unsigned long lr_irq;
-	unsigned long spsr_irq;
-
-	unsigned long r8_fiq;
-	unsigned long r9_fiq;
-	unsigned long r10_fiq;
-	unsigned long r11_fiq;
-	unsigned long r12_fiq;
-	unsigned long sp_fiq;
-	unsigned long lr_fiq;
-	unsigned long spsr_fiq;
-};
-
-void __naked get_mode_regs(struct mode_regs *regs)
-{
-	asm volatile (
-	"mrs	r1, cpsr\n"
-	"msr	cpsr_c, #0xd3 @(SVC_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r13 - r14}\n"
-	"mrs	r2, spsr\n"
-	"msr	cpsr_c, #0xd7 @(ABT_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r2, r13 - r14}\n"
-	"mrs	r2, spsr\n"
-	"msr	cpsr_c, #0xdb @(UND_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r2, r13 - r14}\n"
-	"mrs	r2, spsr\n"
-	"msr	cpsr_c, #0xd2 @(IRQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r2, r13 - r14}\n"
-	"mrs	r2, spsr\n"
-	"msr	cpsr_c, #0xd1 @(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
-	"stmia	r0!, {r2, r8 - r14}\n"
-	"mrs	r2, spsr\n"
-	"stmia	r0!, {r2}\n"
-	"msr	cpsr_c, r1\n"
-	"bx	lr\n");
-}
-
-
-static void dump_allregs(struct fiq_debugger_state *state, unsigned *regs)
-{
-	struct mode_regs mode_regs;
-	dump_regs(state, regs);
-	get_mode_regs(&mode_regs);
-	debug_printf(state, " svc: sp %08x  lr %08x  spsr %08x\n",
-			mode_regs.sp_svc, mode_regs.lr_svc, mode_regs.spsr_svc);
-	debug_printf(state, " abt: sp %08x  lr %08x  spsr %08x\n",
-			mode_regs.sp_abt, mode_regs.lr_abt, mode_regs.spsr_abt);
-	debug_printf(state, " und: sp %08x  lr %08x  spsr %08x\n",
-			mode_regs.sp_und, mode_regs.lr_und, mode_regs.spsr_und);
-	debug_printf(state, " irq: sp %08x  lr %08x  spsr %08x\n",
-			mode_regs.sp_irq, mode_regs.lr_irq, mode_regs.spsr_irq);
-	debug_printf(state, " fiq: r8 %08x  r9 %08x  r10 %08x  r11 %08x  "
-			"r12 %08x\n",
-			mode_regs.r8_fiq, mode_regs.r9_fiq, mode_regs.r10_fiq,
-			mode_regs.r11_fiq, mode_regs.r12_fiq);
-	debug_printf(state, " fiq: sp %08x  lr %08x  spsr %08x\n",
-			mode_regs.sp_fiq, mode_regs.lr_fiq, mode_regs.spsr_fiq);
-}
-
-static void dump_irqs(struct fiq_debugger_state *state)
-{
-	int n;
-	struct irq_desc *desc;
-
-	debug_printf(state, "irqnr       total  since-last   status  name\n");
-	for_each_irq_desc(n, desc) {
-		struct irqaction *act = desc->action;
-		if (!act && !kstat_irqs(n))
-			continue;
-		debug_printf(state, "%5d: %10u %11u %8x  %s\n", n,
-			kstat_irqs(n),
-			kstat_irqs(n) - state->last_irqs[n],
-			desc->status_use_accessors,
-			(act && act->name) ? act->name : "???");
-		state->last_irqs[n] = kstat_irqs(n);
-	}
-}
-
-struct stacktrace_state {
-	struct fiq_debugger_state *state;
-	unsigned int depth;
-};
-
-static int report_trace(struct stackframe *frame, void *d)
-{
-	struct stacktrace_state *sts = d;
-
-	if (sts->depth) {
-		debug_printf(sts->state,
-			"  pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
-			frame->pc, frame->pc, frame->lr, frame->lr,
-			frame->sp, frame->fp);
-		sts->depth--;
-		return 0;
-	}
-	debug_printf(sts->state, "  ...\n");
-
-	return sts->depth == 0;
-}
-
-struct frame_tail {
-	struct frame_tail *fp;
-	unsigned long sp;
-	unsigned long lr;
-} __attribute__((packed));
-
-static struct frame_tail *user_backtrace(struct fiq_debugger_state *state,
-					struct frame_tail *tail)
-{
-	struct frame_tail buftail[2];
-
-	/* Also check accessibility of one struct frame_tail beyond */
-	if (!access_ok(VERIFY_READ, tail, sizeof(buftail))) {
-		debug_printf(state, "  invalid frame pointer %p\n", tail);
-		return NULL;
-	}
-	if (__copy_from_user_inatomic(buftail, tail, sizeof(buftail))) {
-		debug_printf(state,
-			"  failed to copy frame pointer %p\n", tail);
-		return NULL;
-	}
-
-	debug_printf(state, "  %p\n", buftail[0].lr);
-
-	/* frame pointers should strictly progress back up the stack
-	 * (towards higher addresses) */
-	if (tail >= buftail[0].fp)
-		return NULL;
-
-	return buftail[0].fp-1;
-}
-
-void dump_stacktrace(struct fiq_debugger_state *state,
-		struct pt_regs * const regs, unsigned int depth, void *ssp)
-{
-	struct frame_tail *tail;
-	struct thread_info *real_thread_info = THREAD_INFO(ssp);
-	struct stacktrace_state sts;
-
-	sts.depth = depth;
-	sts.state = state;
-	*current_thread_info() = *real_thread_info;
-
-	if (!current)
-		debug_printf(state, "current NULL\n");
-	else
-		debug_printf(state, "pid: %d  comm: %s\n",
-			current->pid, current->comm);
-	dump_regs(state, (unsigned *)regs);
-
-	if (!user_mode(regs)) {
-		struct stackframe frame;
-		frame.fp = regs->ARM_fp;
-		frame.sp = regs->ARM_sp;
-		frame.lr = regs->ARM_lr;
-		frame.pc = regs->ARM_pc;
-		debug_printf(state,
-			"  pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
-			regs->ARM_pc, regs->ARM_pc, regs->ARM_lr, regs->ARM_lr,
-			regs->ARM_sp, regs->ARM_fp);
-		walk_stackframe(&frame, report_trace, &sts);
-		return;
-	}
-
-	tail = ((struct frame_tail *) regs->ARM_fp) - 1;
-	while (depth-- && tail && !((unsigned long) tail & 3))
-		tail = user_backtrace(state, tail);
-}
-
-static void do_ps(struct fiq_debugger_state *state)
-{
-	struct task_struct *g;
-	struct task_struct *p;
-	unsigned task_state;
-	static const char stat_nam[] = "RSDTtZX";
-
-	debug_printf(state, "pid   ppid  prio task            pc\n");
-	read_lock(&tasklist_lock);
-	do_each_thread(g, p) {
-		task_state = p->state ? __ffs(p->state) + 1 : 0;
-		debug_printf(state,
-			     "%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
-		debug_printf(state, "%-13.13s %c", p->comm,
-			     task_state >= sizeof(stat_nam) ? '?' : stat_nam[task_state]);
-		if (task_state == TASK_RUNNING)
-			debug_printf(state, " running\n");
-		else
-			debug_printf(state, " %08lx\n", thread_saved_pc(p));
-	} while_each_thread(g, p);
-	read_unlock(&tasklist_lock);
-}
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-static void begin_syslog_dump(struct fiq_debugger_state *state)
-{
-	state->syslog_dumping = true;
-}
-
-static void end_syslog_dump(struct fiq_debugger_state *state)
-{
-	state->syslog_dumping = false;
-}
-#else
-extern int do_syslog(int type, char __user *bug, int count);
-static void begin_syslog_dump(struct fiq_debugger_state *state)
-{
-	do_syslog(5 /* clear */, NULL, 0);
-}
-
-static void end_syslog_dump(struct fiq_debugger_state *state)
-{
-	dump_kernel_log(state);
-}
-#endif
-
-static void do_sysrq(struct fiq_debugger_state *state, char rq)
-{
-	if ((rq == 'g' || rq == 'G') && !fiq_kgdb_enable) {
-		debug_printf(state, "sysrq-g blocked\n");
-		return;
-	}
-	begin_syslog_dump(state);
-	handle_sysrq(rq);
-	end_syslog_dump(state);
-}
-
-#ifdef CONFIG_KGDB
-static void do_kgdb(struct fiq_debugger_state *state)
-{
-	if (!fiq_kgdb_enable) {
-		debug_printf(state, "kgdb through fiq debugger not enabled\n");
-		return;
-	}
-
-	debug_printf(state, "enabling console and triggering kgdb\n");
-	state->console_enable = true;
-	handle_sysrq('g');
-}
-#endif
-
-static void debug_schedule_work(struct fiq_debugger_state *state, char *cmd)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&state->work_lock, flags);
-	if (state->work_cmd[0] != '\0') {
-		debug_printf(state, "work command processor busy\n");
-		spin_unlock_irqrestore(&state->work_lock, flags);
-		return;
-	}
-
-	strlcpy(state->work_cmd, cmd, sizeof(state->work_cmd));
-	spin_unlock_irqrestore(&state->work_lock, flags);
-
-	schedule_work(&state->work);
-}
-
-static void debug_work(struct work_struct *work)
-{
-	struct fiq_debugger_state *state;
-	char work_cmd[DEBUG_MAX];
-	char *cmd;
-	unsigned long flags;
-
-	state = container_of(work, struct fiq_debugger_state, work);
-
-	spin_lock_irqsave(&state->work_lock, flags);
-
-	strlcpy(work_cmd, state->work_cmd, sizeof(work_cmd));
-	state->work_cmd[0] = '\0';
-
-	spin_unlock_irqrestore(&state->work_lock, flags);
-
-	cmd = work_cmd;
-	if (!strncmp(cmd, "reboot", 6)) {
-		cmd += 6;
-		while (*cmd == ' ')
-			cmd++;
-		if (cmd != '\0')
-			kernel_restart(cmd);
-		else
-			kernel_restart(NULL);
-	} else {
-		debug_printf(state, "unknown work command '%s'\n", work_cmd);
-	}
-}
-
-/* This function CANNOT be called in FIQ context */
-static void debug_irq_exec(struct fiq_debugger_state *state, char *cmd)
-{
-	if (!strcmp(cmd, "ps"))
-		do_ps(state);
-	if (!strcmp(cmd, "sysrq"))
-		do_sysrq(state, 'h');
-	if (!strncmp(cmd, "sysrq ", 6))
-		do_sysrq(state, cmd[6]);
-#ifdef CONFIG_KGDB
-	if (!strcmp(cmd, "kgdb"))
-		do_kgdb(state);
-#endif
-	if (!strncmp(cmd, "reboot", 6))
-		debug_schedule_work(state, cmd);
-}
-
-static void debug_help(struct fiq_debugger_state *state)
-{
-	debug_printf(state,	"FIQ Debugger commands:\n"
-				" pc            PC status\n"
-				" regs          Register dump\n"
-				" allregs       Extended Register dump\n"
-				" bt            Stack trace\n"
-				" reboot [<c>]  Reboot with command <c>\n"
-				" reset [<c>]   Hard reset with command <c>\n"
-				" irqs          Interupt status\n"
-				" kmsg          Kernel log\n"
-				" version       Kernel version\n");
-	debug_printf(state,	" sleep         Allow sleep while in FIQ\n"
-				" nosleep       Disable sleep while in FIQ\n"
-				" console       Switch terminal to console\n"
-				" cpu           Current CPU\n"
-				" cpu <number>  Switch to CPU<number>\n");
-	debug_printf(state,	" ps            Process list\n"
-				" sysrq         sysrq options\n"
-				" sysrq <param> Execute sysrq with <param>\n");
-#ifdef CONFIG_KGDB
-	debug_printf(state,	" kgdb          Enter kernel debugger\n");
-#endif
-}
-
-static void take_affinity(void *info)
-{
-	struct fiq_debugger_state *state = info;
-	struct cpumask cpumask;
-
-	cpumask_clear(&cpumask);
-	cpumask_set_cpu(get_cpu(), &cpumask);
-
-	irq_set_affinity(state->uart_irq, &cpumask);
-}
-
-static void switch_cpu(struct fiq_debugger_state *state, int cpu)
-{
-	if (!debug_have_fiq(state))
-		smp_call_function_single(cpu, take_affinity, state, false);
-	state->current_cpu = cpu;
-}
-
-static bool debug_fiq_exec(struct fiq_debugger_state *state,
-			const char *cmd, unsigned *regs, void *svc_sp)
-{
-	bool signal_helper = false;
-
-	if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
-		debug_help(state);
-	} else if (!strcmp(cmd, "pc")) {
-		debug_printf(state, " pc %08x cpsr %08x mode %s\n",
-			regs[15], regs[16], mode_name(regs[16]));
-	} else if (!strcmp(cmd, "regs")) {
-		dump_regs(state, regs);
-	} else if (!strcmp(cmd, "allregs")) {
-		dump_allregs(state, regs);
-	} else if (!strcmp(cmd, "bt")) {
-		dump_stacktrace(state, (struct pt_regs *)regs, 100, svc_sp);
-	} else if (!strncmp(cmd, "reset", 5)) {
-		cmd += 5;
-		while (*cmd == ' ')
-			cmd++;
-		if (*cmd) {
-			char tmp_cmd[32];
-			strlcpy(tmp_cmd, cmd, sizeof(tmp_cmd));
-			machine_restart(tmp_cmd);
-		} else {
-			machine_restart(NULL);
-		}
-	} else if (!strcmp(cmd, "irqs")) {
-		dump_irqs(state);
-	} else if (!strcmp(cmd, "kmsg")) {
-		dump_kernel_log(state);
-	} else if (!strcmp(cmd, "version")) {
-		debug_printf(state, "%s\n", linux_banner);
-	} else if (!strcmp(cmd, "sleep")) {
-		state->no_sleep = false;
-		debug_printf(state, "enabling sleep\n");
-	} else if (!strcmp(cmd, "nosleep")) {
-		state->no_sleep = true;
-		debug_printf(state, "disabling sleep\n");
-	} else if (!strcmp(cmd, "console")) {
-		debug_printf(state, "console mode\n");
-		debug_uart_flush(state);
-		state->console_enable = true;
-	} else if (!strcmp(cmd, "cpu")) {
-		debug_printf(state, "cpu %d\n", state->current_cpu);
-	} else if (!strncmp(cmd, "cpu ", 4)) {
-		unsigned long cpu = 0;
-		if (strict_strtoul(cmd + 4, 10, &cpu) == 0)
-			switch_cpu(state, cpu);
-		else
-			debug_printf(state, "invalid cpu\n");
-		debug_printf(state, "cpu %d\n", state->current_cpu);
-	} else {
-		if (state->debug_busy) {
-			debug_printf(state,
-				"command processor busy. trying to abort.\n");
-			state->debug_abort = -1;
-		} else {
-			strcpy(state->debug_cmd, cmd);
-			state->debug_busy = 1;
-		}
-
-		return true;
-	}
-	if (!state->console_enable)
-		debug_prompt(state);
-
-	return signal_helper;
-}
-
-static void sleep_timer_expired(unsigned long data)
-{
-	struct fiq_debugger_state *state = (struct fiq_debugger_state *)data;
-	unsigned long flags;
-
-	spin_lock_irqsave(&state->sleep_timer_lock, flags);
-	if (state->uart_enabled && !state->no_sleep) {
-		if (state->debug_enable && !state->console_enable) {
-			state->debug_enable = false;
-			debug_printf_nfiq(state, "suspending fiq debugger\n");
-		}
-		state->ignore_next_wakeup_irq = true;
-		debug_uart_disable(state);
-		state->uart_enabled = false;
-		enable_wakeup_irq(state);
-	}
-	wake_unlock(&state->debugger_wake_lock);
-	spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
-}
-
-static void handle_wakeup(struct fiq_debugger_state *state)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&state->sleep_timer_lock, flags);
-	if (state->wakeup_irq >= 0 && state->ignore_next_wakeup_irq) {
-		state->ignore_next_wakeup_irq = false;
-	} else if (!state->uart_enabled) {
-		wake_lock(&state->debugger_wake_lock);
-		debug_uart_enable(state);
-		state->uart_enabled = true;
-		disable_wakeup_irq(state);
-		mod_timer(&state->sleep_timer, jiffies + HZ / 2);
-	}
-	spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
-}
-
-static irqreturn_t wakeup_irq_handler(int irq, void *dev)
-{
-	struct fiq_debugger_state *state = dev;
-
-	if (!state->no_sleep)
-		debug_puts(state, "WAKEUP\n");
-	handle_wakeup(state);
-
-	return IRQ_HANDLED;
-}
-
-static void debug_handle_console_irq_context(struct fiq_debugger_state *state)
-{
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-	if (state->tty_port.ops) {
-		int i;
-		int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
-		for (i = 0; i < count; i++) {
-			int c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
-			tty_insert_flip_char(&state->tty_port, c, TTY_NORMAL);
-			if (!fiq_debugger_ringbuf_consume(state->tty_rbuf, 1))
-				pr_warn("fiq tty failed to consume byte\n");
-		}
-		tty_flip_buffer_push(&state->tty_port);
-	}
-#endif
-}
-
-static void debug_handle_irq_context(struct fiq_debugger_state *state)
-{
-	if (!state->no_sleep) {
-		unsigned long flags;
-
-		spin_lock_irqsave(&state->sleep_timer_lock, flags);
-		wake_lock(&state->debugger_wake_lock);
-		mod_timer(&state->sleep_timer, jiffies + HZ * 5);
-		spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
-	}
-	debug_handle_console_irq_context(state);
-	if (state->debug_busy) {
-		debug_irq_exec(state, state->debug_cmd);
-		if (!state->console_enable)
-			debug_prompt(state);
-		state->debug_busy = 0;
-	}
-}
-
-static int debug_getc(struct fiq_debugger_state *state)
-{
-	return state->pdata->uart_getc(state->pdev);
-}
-
-static bool debug_handle_uart_interrupt(struct fiq_debugger_state *state,
-			int this_cpu, void *regs, void *svc_sp)
-{
-	int c;
-	static int last_c;
-	int count = 0;
-	bool signal_helper = false;
-
-	if (this_cpu != state->current_cpu) {
-		if (state->in_fiq)
-			return false;
-
-		if (atomic_inc_return(&state->unhandled_fiq_count) !=
-					MAX_UNHANDLED_FIQ_COUNT)
-			return false;
-
-		debug_printf(state, "fiq_debugger: cpu %d not responding, "
-			"reverting to cpu %d\n", state->current_cpu,
-			this_cpu);
-
-		atomic_set(&state->unhandled_fiq_count, 0);
-		switch_cpu(state, this_cpu);
-		return false;
-	}
-
-	state->in_fiq = true;
-
-	while ((c = debug_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
-		count++;
-		if (!state->debug_enable) {
-			if ((c == 13) || (c == 10)) {
-				state->debug_enable = true;
-				state->debug_count = 0;
-				debug_prompt(state);
-			}
-		} else if (c == FIQ_DEBUGGER_BREAK) {
-			state->console_enable = false;
-			debug_puts(state, "fiq debugger mode\n");
-			state->debug_count = 0;
-			debug_prompt(state);
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-		} else if (state->console_enable && state->tty_rbuf) {
-			fiq_debugger_ringbuf_push(state->tty_rbuf, c);
-			signal_helper = true;
-#endif
-		} else if ((c >= ' ') && (c < 127)) {
-			if (state->debug_count < (DEBUG_MAX - 1)) {
-				state->debug_buf[state->debug_count++] = c;
-				debug_putc(state, c);
-			}
-		} else if ((c == 8) || (c == 127)) {
-			if (state->debug_count > 0) {
-				state->debug_count--;
-				debug_putc(state, 8);
-				debug_putc(state, ' ');
-				debug_putc(state, 8);
-			}
-		} else if ((c == 13) || (c == 10)) {
-			if (c == '\r' || (c == '\n' && last_c != '\r')) {
-				debug_putc(state, '\r');
-				debug_putc(state, '\n');
-			}
-			if (state->debug_count) {
-				state->debug_buf[state->debug_count] = 0;
-				state->debug_count = 0;
-				signal_helper |=
-					debug_fiq_exec(state, state->debug_buf,
-						       regs, svc_sp);
-			} else {
-				debug_prompt(state);
-			}
-		}
-		last_c = c;
-	}
-	if (!state->console_enable)
-		debug_uart_flush(state);
-	if (state->pdata->fiq_ack)
-		state->pdata->fiq_ack(state->pdev, state->fiq);
-
-	/* poke sleep timer if necessary */
-	if (state->debug_enable && !state->no_sleep)
-		signal_helper = true;
-
-	atomic_set(&state->unhandled_fiq_count, 0);
-	state->in_fiq = false;
-
-	return signal_helper;
-}
-
-static void debug_fiq(struct fiq_glue_handler *h, void *regs, void *svc_sp)
-{
-	struct fiq_debugger_state *state =
-		container_of(h, struct fiq_debugger_state, handler);
-	unsigned int this_cpu = THREAD_INFO(svc_sp)->cpu;
-	bool need_irq;
-
-	need_irq = debug_handle_uart_interrupt(state, this_cpu, regs, svc_sp);
-	if (need_irq)
-		debug_force_irq(state);
-}
-
-/*
- * When not using FIQs, we only use this single interrupt as an entry point.
- * This just effectively takes over the UART interrupt and does all the work
- * in this context.
- */
-static irqreturn_t debug_uart_irq(int irq, void *dev)
-{
-	struct fiq_debugger_state *state = dev;
-	bool not_done;
-
-	handle_wakeup(state);
-
-	/* handle the debugger irq in regular context */
-	not_done = debug_handle_uart_interrupt(state, smp_processor_id(),
-					      get_irq_regs(),
-					      current_thread_info());
-	if (not_done)
-		debug_handle_irq_context(state);
-
-	return IRQ_HANDLED;
-}
-
-/*
- * If FIQs are used, not everything can happen in fiq context.
- * FIQ handler does what it can and then signals this interrupt to finish the
- * job in irq context.
- */
-static irqreturn_t debug_signal_irq(int irq, void *dev)
-{
-	struct fiq_debugger_state *state = dev;
-
-	if (state->pdata->force_irq_ack)
-		state->pdata->force_irq_ack(state->pdev, state->signal_irq);
-
-	debug_handle_irq_context(state);
-
-	return IRQ_HANDLED;
-}
-
-static void debug_resume(struct fiq_glue_handler *h)
-{
-	struct fiq_debugger_state *state =
-		container_of(h, struct fiq_debugger_state, handler);
-	if (state->pdata->uart_resume)
-		state->pdata->uart_resume(state->pdev);
-}
-
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-struct tty_driver *debug_console_device(struct console *co, int *index)
-{
-	*index = co->index;
-	return fiq_tty_driver;
-}
-
-static void debug_console_write(struct console *co,
-				const char *s, unsigned int count)
-{
-	struct fiq_debugger_state *state;
-	unsigned long flags;
-
-	state = container_of(co, struct fiq_debugger_state, console);
-
-	if (!state->console_enable && !state->syslog_dumping)
-		return;
-
-	debug_uart_enable(state);
-	spin_lock_irqsave(&state->console_lock, flags);
-	while (count--) {
-		if (*s == '\n')
-			debug_putc(state, '\r');
-		debug_putc(state, *s++);
-	}
-	debug_uart_flush(state);
-	spin_unlock_irqrestore(&state->console_lock, flags);
-	debug_uart_disable(state);
-}
-
-static struct console fiq_debugger_console = {
-	.name = "ttyFIQ",
-	.device = debug_console_device,
-	.write = debug_console_write,
-	.flags = CON_PRINTBUFFER | CON_ANYTIME | CON_ENABLED,
-};
-
-int fiq_tty_open(struct tty_struct *tty, struct file *filp)
-{
-	int line = tty->index;
-	struct fiq_debugger_state **states = tty->driver->driver_state;
-	struct fiq_debugger_state *state = states[line];
-
-	return tty_port_open(&state->tty_port, tty, filp);
-}
-
-void fiq_tty_close(struct tty_struct *tty, struct file *filp)
-{
-	tty_port_close(tty->port, tty, filp);
-}
-
-int  fiq_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
-	int i;
-	int line = tty->index;
-	struct fiq_debugger_state **states = tty->driver->driver_state;
-	struct fiq_debugger_state *state = states[line];
-
-	if (!state->console_enable)
-		return count;
-
-	debug_uart_enable(state);
-	spin_lock_irq(&state->console_lock);
-	for (i = 0; i < count; i++)
-		debug_putc(state, *buf++);
-	spin_unlock_irq(&state->console_lock);
-	debug_uart_disable(state);
-
-	return count;
-}
-
-int  fiq_tty_write_room(struct tty_struct *tty)
-{
-	return 16;
-}
-
-#ifdef CONFIG_CONSOLE_POLL
-static int fiq_tty_poll_init(struct tty_driver *driver, int line, char *options)
-{
-	return 0;
-}
-
-static int fiq_tty_poll_get_char(struct tty_driver *driver, int line)
-{
-	struct fiq_debugger_state **states = driver->driver_state;
-	struct fiq_debugger_state *state = states[line];
-	int c = NO_POLL_CHAR;
-
-	debug_uart_enable(state);
-	if (debug_have_fiq(state)) {
-		int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
-		if (count > 0) {
-			c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
-			fiq_debugger_ringbuf_consume(state->tty_rbuf, 1);
-		}
-	} else {
-		c = debug_getc(state);
-		if (c == FIQ_DEBUGGER_NO_CHAR)
-			c = NO_POLL_CHAR;
-	}
-	debug_uart_disable(state);
-
-	return c;
-}
-
-static void fiq_tty_poll_put_char(struct tty_driver *driver, int line, char ch)
-{
-	struct fiq_debugger_state **states = driver->driver_state;
-	struct fiq_debugger_state *state = states[line];
-	debug_uart_enable(state);
-	debug_putc(state, ch);
-	debug_uart_disable(state);
-}
-#endif
-
-static const struct tty_port_operations fiq_tty_port_ops;
-
-static const struct tty_operations fiq_tty_driver_ops = {
-	.write = fiq_tty_write,
-	.write_room = fiq_tty_write_room,
-	.open = fiq_tty_open,
-	.close = fiq_tty_close,
-#ifdef CONFIG_CONSOLE_POLL
-	.poll_init = fiq_tty_poll_init,
-	.poll_get_char = fiq_tty_poll_get_char,
-	.poll_put_char = fiq_tty_poll_put_char,
-#endif
-};
-
-static int fiq_debugger_tty_init(void)
-{
-	int ret;
-	struct fiq_debugger_state **states = NULL;
-
-	states = kzalloc(sizeof(*states) * MAX_FIQ_DEBUGGER_PORTS, GFP_KERNEL);
-	if (!states) {
-		pr_err("Failed to allocate fiq debugger state structres\n");
-		return -ENOMEM;
-	}
-
-	fiq_tty_driver = alloc_tty_driver(MAX_FIQ_DEBUGGER_PORTS);
-	if (!fiq_tty_driver) {
-		pr_err("Failed to allocate fiq debugger tty\n");
-		ret = -ENOMEM;
-		goto err_free_state;
-	}
-
-	fiq_tty_driver->owner		= THIS_MODULE;
-	fiq_tty_driver->driver_name	= "fiq-debugger";
-	fiq_tty_driver->name		= "ttyFIQ";
-	fiq_tty_driver->type		= TTY_DRIVER_TYPE_SERIAL;
-	fiq_tty_driver->subtype		= SERIAL_TYPE_NORMAL;
-	fiq_tty_driver->init_termios	= tty_std_termios;
-	fiq_tty_driver->flags		= TTY_DRIVER_REAL_RAW |
-					  TTY_DRIVER_DYNAMIC_DEV;
-	fiq_tty_driver->driver_state	= states;
-
-	fiq_tty_driver->init_termios.c_cflag =
-					B115200 | CS8 | CREAD | HUPCL | CLOCAL;
-	fiq_tty_driver->init_termios.c_ispeed = 115200;
-	fiq_tty_driver->init_termios.c_ospeed = 115200;
-
-	tty_set_operations(fiq_tty_driver, &fiq_tty_driver_ops);
-
-	ret = tty_register_driver(fiq_tty_driver);
-	if (ret) {
-		pr_err("Failed to register fiq tty: %d\n", ret);
-		goto err_free_tty;
-	}
-
-	pr_info("Registered FIQ tty driver\n");
-	return 0;
-
-err_free_tty:
-	put_tty_driver(fiq_tty_driver);
-	fiq_tty_driver = NULL;
-err_free_state:
-	kfree(states);
-	return ret;
-}
-
-static int fiq_debugger_tty_init_one(struct fiq_debugger_state *state)
-{
-	int ret;
-	struct device *tty_dev;
-	struct fiq_debugger_state **states = fiq_tty_driver->driver_state;
-
-	states[state->pdev->id] = state;
-
-	state->tty_rbuf = fiq_debugger_ringbuf_alloc(1024);
-	if (!state->tty_rbuf) {
-		pr_err("Failed to allocate fiq debugger ringbuf\n");
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	tty_port_init(&state->tty_port);
-	state->tty_port.ops = &fiq_tty_port_ops;
-
-	tty_dev = tty_port_register_device(&state->tty_port, fiq_tty_driver,
-					   state->pdev->id, &state->pdev->dev);
-	if (IS_ERR(tty_dev)) {
-		pr_err("Failed to register fiq debugger tty device\n");
-		ret = PTR_ERR(tty_dev);
-		goto err;
-	}
-
-	device_set_wakeup_capable(tty_dev, 1);
-
-	pr_info("Registered fiq debugger ttyFIQ%d\n", state->pdev->id);
-
-	return 0;
-
-err:
-	fiq_debugger_ringbuf_free(state->tty_rbuf);
-	state->tty_rbuf = NULL;
-	return ret;
-}
-#endif
-
-static int fiq_debugger_dev_suspend(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct fiq_debugger_state *state = platform_get_drvdata(pdev);
-
-	if (state->pdata->uart_dev_suspend)
-		return state->pdata->uart_dev_suspend(pdev);
-	return 0;
-}
-
-static int fiq_debugger_dev_resume(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct fiq_debugger_state *state = platform_get_drvdata(pdev);
-
-	if (state->pdata->uart_dev_resume)
-		return state->pdata->uart_dev_resume(pdev);
-	return 0;
-}
-
-static int fiq_debugger_probe(struct platform_device *pdev)
-{
-	int ret;
-	struct fiq_debugger_pdata *pdata = dev_get_platdata(&pdev->dev);
-	struct fiq_debugger_state *state;
-	int fiq;
-	int uart_irq;
-
-	if (pdev->id >= MAX_FIQ_DEBUGGER_PORTS)
-		return -EINVAL;
-
-	if (!pdata->uart_getc || !pdata->uart_putc)
-		return -EINVAL;
-	if ((pdata->uart_enable && !pdata->uart_disable) ||
-	    (!pdata->uart_enable && pdata->uart_disable))
-		return -EINVAL;
-
-	fiq = platform_get_irq_byname(pdev, "fiq");
-	uart_irq = platform_get_irq_byname(pdev, "uart_irq");
-
-	/* uart_irq mode and fiq mode are mutually exclusive, but one of them
-	 * is required */
-	if ((uart_irq < 0 && fiq < 0) || (uart_irq >= 0 && fiq >= 0))
-		return -EINVAL;
-	if (fiq >= 0 && !pdata->fiq_enable)
-		return -EINVAL;
-
-	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	setup_timer(&state->sleep_timer, sleep_timer_expired,
-		    (unsigned long)state);
-	state->pdata = pdata;
-	state->pdev = pdev;
-	state->no_sleep = initial_no_sleep;
-	state->debug_enable = initial_debug_enable;
-	state->console_enable = initial_console_enable;
-
-	state->fiq = fiq;
-	state->uart_irq = uart_irq;
-	state->signal_irq = platform_get_irq_byname(pdev, "signal");
-	state->wakeup_irq = platform_get_irq_byname(pdev, "wakeup");
-
-	INIT_WORK(&state->work, debug_work);
-	spin_lock_init(&state->work_lock);
-
-	platform_set_drvdata(pdev, state);
-
-	spin_lock_init(&state->sleep_timer_lock);
-
-	if (state->wakeup_irq < 0 && debug_have_fiq(state))
-		state->no_sleep = true;
-	state->ignore_next_wakeup_irq = !state->no_sleep;
-
-	wake_lock_init(&state->debugger_wake_lock,
-			WAKE_LOCK_SUSPEND, "serial-debug");
-
-	state->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(state->clk))
-		state->clk = NULL;
-
-	/* do not call pdata->uart_enable here since uart_init may still
-	 * need to do some initialization before uart_enable can work.
-	 * So, only try to manage the clock during init.
-	 */
-	if (state->clk)
-		clk_enable(state->clk);
-
-	if (pdata->uart_init) {
-		ret = pdata->uart_init(pdev);
-		if (ret)
-			goto err_uart_init;
-	}
-
-	debug_printf_nfiq(state, "<hit enter %sto activate fiq debugger>\n",
-				state->no_sleep ? "" : "twice ");
-
-	if (debug_have_fiq(state)) {
-		state->handler.fiq = debug_fiq;
-		state->handler.resume = debug_resume;
-		ret = fiq_glue_register_handler(&state->handler);
-		if (ret) {
-			pr_err("%s: could not install fiq handler\n", __func__);
-			goto err_register_fiq;
-		}
-
-		pdata->fiq_enable(pdev, state->fiq, 1);
-	} else {
-		ret = request_irq(state->uart_irq, debug_uart_irq,
-				  IRQF_NO_SUSPEND, "debug", state);
-		if (ret) {
-			pr_err("%s: could not install irq handler\n", __func__);
-			goto err_register_irq;
-		}
-
-		/* for irq-only mode, we want this irq to wake us up, if it
-		 * can.
-		 */
-		enable_irq_wake(state->uart_irq);
-	}
-
-	if (state->clk)
-		clk_disable(state->clk);
-
-	if (state->signal_irq >= 0) {
-		ret = request_irq(state->signal_irq, debug_signal_irq,
-			  IRQF_TRIGGER_RISING, "debug-signal", state);
-		if (ret)
-			pr_err("serial_debugger: could not install signal_irq");
-	}
-
-	if (state->wakeup_irq >= 0) {
-		ret = request_irq(state->wakeup_irq, wakeup_irq_handler,
-				  IRQF_TRIGGER_FALLING | IRQF_DISABLED,
-				  "debug-wakeup", state);
-		if (ret) {
-			pr_err("serial_debugger: "
-				"could not install wakeup irq\n");
-			state->wakeup_irq = -1;
-		} else {
-			ret = enable_irq_wake(state->wakeup_irq);
-			if (ret) {
-				pr_err("serial_debugger: "
-					"could not enable wakeup\n");
-				state->wakeup_irq_no_set_wake = true;
-			}
-		}
-	}
-	if (state->no_sleep)
-		handle_wakeup(state);
-
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-	spin_lock_init(&state->console_lock);
-	state->console = fiq_debugger_console;
-	state->console.index = pdev->id;
-	if (!console_set_on_cmdline)
-		add_preferred_console(state->console.name,
-			state->console.index, NULL);
-	register_console(&state->console);
-	fiq_debugger_tty_init_one(state);
-#endif
-	return 0;
-
-err_register_irq:
-err_register_fiq:
-	if (pdata->uart_free)
-		pdata->uart_free(pdev);
-err_uart_init:
-	if (state->clk)
-		clk_disable(state->clk);
-	if (state->clk)
-		clk_put(state->clk);
-	wake_lock_destroy(&state->debugger_wake_lock);
-	platform_set_drvdata(pdev, NULL);
-	kfree(state);
-	return ret;
-}
-
-static const struct dev_pm_ops fiq_debugger_dev_pm_ops = {
-	.suspend	= fiq_debugger_dev_suspend,
-	.resume		= fiq_debugger_dev_resume,
-};
-
-static struct platform_driver fiq_debugger_driver = {
-	.probe	= fiq_debugger_probe,
-	.driver	= {
-		.name	= "fiq_debugger",
-		.pm	= &fiq_debugger_dev_pm_ops,
-	},
-};
-
-static int __init fiq_debugger_init(void)
-{
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-	fiq_debugger_tty_init();
-#endif
-	return platform_driver_register(&fiq_debugger_driver);
-}
-
-postcore_initcall(fiq_debugger_init);
diff --git a/arch/arm/common/fiq_debugger_ringbuf.h b/arch/arm/common/fiq_debugger_ringbuf.h
deleted file mode 100644
index 2649b5581088..000000000000
--- a/arch/arm/common/fiq_debugger_ringbuf.h
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * arch/arm/common/fiq_debugger_ringbuf.c
- *
- * simple lockless ringbuffer
- *
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-
-struct fiq_debugger_ringbuf {
-	int len;
-	int head;
-	int tail;
-	u8 buf[];
-};
-
-
-static inline struct fiq_debugger_ringbuf *fiq_debugger_ringbuf_alloc(int len)
-{
-	struct fiq_debugger_ringbuf *rbuf;
-
-	rbuf = kzalloc(sizeof(*rbuf) + len, GFP_KERNEL);
-	if (rbuf == NULL)
-		return NULL;
-
-	rbuf->len = len;
-	rbuf->head = 0;
-	rbuf->tail = 0;
-	smp_mb();
-
-	return rbuf;
-}
-
-static inline void fiq_debugger_ringbuf_free(struct fiq_debugger_ringbuf *rbuf)
-{
-	kfree(rbuf);
-}
-
-static inline int fiq_debugger_ringbuf_level(struct fiq_debugger_ringbuf *rbuf)
-{
-	int level = rbuf->head - rbuf->tail;
-
-	if (level < 0)
-		level = rbuf->len + level;
-
-	return level;
-}
-
-static inline int fiq_debugger_ringbuf_room(struct fiq_debugger_ringbuf *rbuf)
-{
-	return rbuf->len - fiq_debugger_ringbuf_level(rbuf) - 1;
-}
-
-static inline u8
-fiq_debugger_ringbuf_peek(struct fiq_debugger_ringbuf *rbuf, int i)
-{
-	return rbuf->buf[(rbuf->tail + i) % rbuf->len];
-}
-
-static inline int
-fiq_debugger_ringbuf_consume(struct fiq_debugger_ringbuf *rbuf, int count)
-{
-	count = min(count, fiq_debugger_ringbuf_level(rbuf));
-
-	rbuf->tail = (rbuf->tail + count) % rbuf->len;
-	smp_mb();
-
-	return count;
-}
-
-static inline int
-fiq_debugger_ringbuf_push(struct fiq_debugger_ringbuf *rbuf, u8 datum)
-{
-	if (fiq_debugger_ringbuf_room(rbuf) == 0)
-		return 0;
-
-	rbuf->buf[rbuf->head] = datum;
-	smp_mb();
-	rbuf->head = (rbuf->head + 1) % rbuf->len;
-	smp_mb();
-
-	return 1;
-}