2 * drivers/staging/android/fiq_debugger.c
4 * Serial Debugger Interface accessed through an FIQ interrupt.
6 * Copyright (C) 2008 Google, Inc.
8 * This software is licensed under the terms of the GNU General Public
9 * License version 2, as published by the Free Software Foundation, and
10 * may be copied, distributed, and modified under those terms.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
19 #include <linux/module.h>
21 #include <linux/console.h>
22 #include <linux/interrupt.h>
23 #include <linux/clk.h>
24 #include <linux/platform_device.h>
25 #include <linux/kernel_stat.h>
26 #include <linux/kmsg_dump.h>
27 #include <linux/irq.h>
28 #include <linux/delay.h>
29 #include <linux/reboot.h>
30 #include <linux/sched.h>
31 #include <linux/slab.h>
32 #include <linux/smp.h>
33 #include <linux/timer.h>
34 #include <linux/tty.h>
35 #include <linux/tty_flip.h>
36 #include <linux/wakelock.h>
38 #ifdef CONFIG_FIQ_GLUE
39 #include <asm/fiq_glue.h>
42 #include <linux/uaccess.h>
43 #include <linux/rockchip/grf.h>
44 #include <linux/rockchip/iomap.h>
45 #include <linux/rockchip/cpu.h>
47 #include "fiq_debugger.h"
48 #include "fiq_debugger_priv.h"
49 #include "fiq_debugger_ringbuf.h"
51 #ifdef CONFIG_RK29_WATCHDOG
52 extern void rk29_wdt_keepalive(void);
53 #define wdt_keepalive() rk29_wdt_keepalive()
55 #define wdt_keepalive() do {} while (0)
58 #define CMD_COUNT 0x0f
59 #define MAX_UNHANDLED_FIQ_COUNT 1000000
61 #ifdef CONFIG_ARCH_ROCKCHIP
62 #define MAX_FIQ_DEBUGGER_PORTS 1
64 #define MAX_FIQ_DEBUGGER_PORTS 4
67 struct fiq_debugger_state {
68 #ifdef CONFIG_FIQ_GLUE
69 struct fiq_glue_handler handler;
71 struct fiq_debugger_output output;
77 bool wakeup_irq_no_set_wake;
79 struct fiq_debugger_pdata *pdata;
80 struct platform_device *pdev;
82 char debug_cmd[DEBUG_MAX];
86 char debug_buf[DEBUG_MAX];
89 #ifdef CONFIG_ARCH_ROCKCHIP
90 char cmd_buf[CMD_COUNT+1][DEBUG_MAX];
96 bool ignore_next_wakeup_irq;
97 struct timer_list sleep_timer;
98 spinlock_t sleep_timer_lock;
100 struct wake_lock debugger_wake_lock;
103 atomic_t unhandled_fiq_count;
106 struct work_struct work;
107 spinlock_t work_lock;
108 char work_cmd[DEBUG_MAX];
110 #ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
111 spinlock_t console_lock;
112 struct console console;
113 struct tty_port tty_port;
114 struct fiq_debugger_ringbuf *tty_rbuf;
118 #ifdef CONFIG_ARCH_ROCKCHIP
119 unsigned int last_irqs[1024];
120 unsigned int last_local_irqs[NR_CPUS][32];
122 unsigned int last_irqs[NR_IRQS];
123 unsigned int last_local_timer_irqs[NR_CPUS];
127 #ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
128 struct tty_driver *fiq_tty_driver;
131 #ifdef CONFIG_FIQ_DEBUGGER_NO_SLEEP
132 static bool initial_no_sleep = true;
134 static bool initial_no_sleep;
137 #ifdef CONFIG_FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
138 static bool initial_debug_enable = true;
139 static bool initial_console_enable = true;
141 static bool initial_debug_enable;
142 static bool initial_console_enable;
145 static bool fiq_kgdb_enable;
147 static unsigned long jif = 0, recv_count0 = 0, recv_count1 = 0;
149 module_param_named(no_sleep, initial_no_sleep, bool, 0644);
150 module_param_named(debug_enable, initial_debug_enable, bool, 0644);
151 module_param_named(console_enable, initial_console_enable, bool, 0644);
152 module_param_named(kgdb_enable, fiq_kgdb_enable, bool, 0644);
154 void gic_set_irq_secure(struct irq_data *d);
155 void gic_set_irq_priority(struct irq_data *d, u8 pri);
157 #ifdef CONFIG_FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
159 void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state) {}
161 void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state) {}
164 void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state)
166 if (state->wakeup_irq < 0)
168 enable_irq(state->wakeup_irq);
169 if (!state->wakeup_irq_no_set_wake)
170 enable_irq_wake(state->wakeup_irq);
173 void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state)
175 if (state->wakeup_irq < 0)
177 disable_irq_nosync(state->wakeup_irq);
178 if (!state->wakeup_irq_no_set_wake)
179 disable_irq_wake(state->wakeup_irq);
183 static inline bool fiq_debugger_have_fiq(struct fiq_debugger_state *state)
185 return (state->fiq >= 0);
188 #ifdef CONFIG_FIQ_GLUE
189 static void fiq_debugger_force_irq(struct fiq_debugger_state *state)
191 unsigned int irq = state->signal_irq;
193 if (WARN_ON(!fiq_debugger_have_fiq(state)))
195 if (state->pdata->force_irq) {
196 state->pdata->force_irq(state->pdev, irq);
198 struct irq_chip *chip = irq_get_chip(irq);
199 if (chip && chip->irq_retrigger)
200 chip->irq_retrigger(irq_get_irq_data(irq));
205 static void fiq_debugger_uart_enable(struct fiq_debugger_state *state)
208 clk_enable(state->clk);
209 if (state->pdata->uart_enable)
210 state->pdata->uart_enable(state->pdev);
213 static void fiq_debugger_uart_disable(struct fiq_debugger_state *state)
215 if (state->pdata->uart_disable)
216 state->pdata->uart_disable(state->pdev);
218 clk_disable(state->clk);
221 static void fiq_debugger_uart_flush(struct fiq_debugger_state *state)
223 if (state->pdata->uart_flush)
224 state->pdata->uart_flush(state->pdev);
227 static void fiq_debugger_putc(struct fiq_debugger_state *state, char c)
229 state->pdata->uart_putc(state->pdev, c);
232 static void fiq_debugger_puts(struct fiq_debugger_state *state, char *s)
237 fiq_debugger_putc(state, '\r');
238 fiq_debugger_putc(state, c);
242 static void fiq_debugger_prompt(struct fiq_debugger_state *state)
244 fiq_debugger_puts(state, "debug> ");
247 static void fiq_debugger_dump_kernel_log(struct fiq_debugger_state *state)
249 #ifdef CONFIG_ARCH_ROCKCHIP
255 struct kmsg_dumper dumper = { .active = true };
258 kmsg_dump_rewind_nolock(&dumper);
259 while (kmsg_dump_get_line_nolock(&dumper, true, buf,
260 sizeof(buf) - 1, &len)) {
262 fiq_debugger_puts(state, buf);
263 #ifdef CONFIG_ARCH_ROCKCHIP
269 #ifdef CONFIG_RK_LAST_LOG
270 #include <linux/ctype.h>
271 extern char *rk_last_log_get(unsigned *size);
272 static void fiq_debugger_dump_last_kernel_log(struct fiq_debugger_state *state)
275 char *s = rk_last_log_get(&size);
277 for (i = 0; i < size; i++) {
282 state->pdata->uart_putc(state->pdev, '\r');
283 state->pdata->uart_putc(state->pdev, c);
284 } else if (isascii(c) && isprint(c)) {
285 state->pdata->uart_putc(state->pdev, c);
291 static void fiq_debugger_printf(struct fiq_debugger_output *output,
292 const char *fmt, ...)
294 struct fiq_debugger_state *state;
298 state = container_of(output, struct fiq_debugger_state, output);
300 vsnprintf(buf, sizeof(buf), fmt, ap);
303 fiq_debugger_puts(state, buf);
306 /* Safe outside fiq context */
307 static int fiq_debugger_printf_nfiq(void *cookie, const char *fmt, ...)
309 struct fiq_debugger_state *state = cookie;
312 unsigned long irq_flags;
315 vsnprintf(buf, 128, fmt, ap);
318 local_irq_save(irq_flags);
319 fiq_debugger_puts(state, buf);
320 fiq_debugger_uart_flush(state);
321 local_irq_restore(irq_flags);
322 return state->debug_abort;
325 static void fiq_debugger_dump_irqs(struct fiq_debugger_state *state)
329 struct irq_desc *desc;
331 fiq_debugger_printf(&state->output,
332 "irqnr total since-last status name\n");
333 for_each_irq_desc(n, desc) {
334 struct irqaction *act = desc->action;
335 if (!act && !kstat_irqs(n))
337 fiq_debugger_printf(&state->output, "%5d: %10u %11u %8x %s\n", n,
339 kstat_irqs(n) - state->last_irqs[n],
340 desc->status_use_accessors,
341 (act && act->name) ? act->name : "???");
342 state->last_irqs[n] = kstat_irqs(n);
345 #ifdef CONFIG_ARCH_ROCKCHIP
346 for (n = 16; n < 32; n++) {
347 desc = irq_to_desc(n);
350 for (cpu = 0; cpu < NR_CPUS; cpu++) {
351 unsigned int irqs = kstat_irqs_cpu(n, cpu);
352 struct irqaction *act = desc->action;
353 const char *name = (act && act->name) ? act->name : "???";
356 fiq_debugger_printf(&state->output,
357 "%5d: %10u %11u %s (CPU%d)\n", n,
358 irqs, irqs - state->last_local_irqs[cpu][n],
360 state->last_local_irqs[cpu][n] = irqs;
363 for (n = 0; n < NR_IPI; n++) {
364 #define S(x,s) [x] = s
371 IPI_CALL_FUNC_SINGLE,
376 static const char *ipi_types[NR_IPI] = {
377 S(IPI_WAKEUP, "CPU wakeup"),
378 S(IPI_TIMER, "Timer broadcast"),
379 S(IPI_RESCHEDULE, "Rescheduling"),
380 S(IPI_CALL_FUNC, "Function call"),
381 S(IPI_CALL_FUNC_SINGLE, "Single function call"),
382 S(IPI_CPU_STOP, "CPU stop"),
383 S(IPI_COMPLETION, "Completion"),
384 S(IPI_CPU_BACKTRACE, "CPU backtrace"),
386 #elif defined(CONFIG_ARM64)
390 IPI_CALL_FUNC_SINGLE,
394 static const char *ipi_types[NR_IPI] = {
395 S(IPI_RESCHEDULE, "Rescheduling"),
396 S(IPI_CALL_FUNC, "Function call"),
397 S(IPI_CALL_FUNC_SINGLE, "Single function call"),
398 S(IPI_CPU_STOP, "CPU stop"),
399 S(IPI_TIMER, "Timer broadcast"),
403 for (cpu = 0; cpu < NR_CPUS; cpu++) {
404 unsigned int irqs = __get_irq_stat(cpu, ipi_irqs[n]);
407 fiq_debugger_printf(&state->output,
408 "%5d: %10u %11u %s (CPU%d)\n",
409 n, irqs, irqs - state->last_local_irqs[cpu][n],
411 state->last_local_irqs[cpu][n] = irqs;
417 static void fiq_debugger_do_ps(struct fiq_debugger_state *state)
419 struct task_struct *g;
420 struct task_struct *p;
422 static const char stat_nam[] = "RSDTtZX";
424 fiq_debugger_printf(&state->output, "pid ppid prio task pc\n");
425 read_lock(&tasklist_lock);
426 do_each_thread(g, p) {
427 task_state = p->state ? __ffs(p->state) + 1 : 0;
428 fiq_debugger_printf(&state->output,
429 "%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
430 fiq_debugger_printf(&state->output, "%-13.13s %c", p->comm,
431 task_state >= sizeof(stat_nam) ? '?' : stat_nam[task_state]);
432 if (task_state == TASK_RUNNING)
433 fiq_debugger_printf(&state->output, " running\n");
435 fiq_debugger_printf(&state->output, " %08lx\n",
437 } while_each_thread(g, p);
438 read_unlock(&tasklist_lock);
441 #ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
442 static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
444 state->syslog_dumping = true;
447 static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
449 state->syslog_dumping = false;
452 extern int do_syslog(int type, char __user *bug, int count);
453 static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
455 do_syslog(5 /* clear */, NULL, 0);
458 static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
460 fiq_debugger_dump_kernel_log(state);
464 static void fiq_debugger_do_sysrq(struct fiq_debugger_state *state, char rq)
466 if ((rq == 'g' || rq == 'G') && !fiq_kgdb_enable) {
467 fiq_debugger_printf(&state->output, "sysrq-g blocked\n");
470 fiq_debugger_begin_syslog_dump(state);
472 fiq_debugger_end_syslog_dump(state);
476 static void fiq_debugger_do_kgdb(struct fiq_debugger_state *state)
478 if (!fiq_kgdb_enable) {
479 fiq_debugger_printf(&state->output, "kgdb through fiq debugger not enabled\n");
483 fiq_debugger_printf(&state->output, "enabling console and triggering kgdb\n");
484 state->console_enable = true;
489 static void fiq_debugger_schedule_work(struct fiq_debugger_state *state,
494 spin_lock_irqsave(&state->work_lock, flags);
495 if (state->work_cmd[0] != '\0') {
496 fiq_debugger_printf(&state->output, "work command processor busy\n");
497 spin_unlock_irqrestore(&state->work_lock, flags);
501 strlcpy(state->work_cmd, cmd, sizeof(state->work_cmd));
502 spin_unlock_irqrestore(&state->work_lock, flags);
504 schedule_work(&state->work);
507 static void fiq_debugger_work(struct work_struct *work)
509 struct fiq_debugger_state *state;
510 char work_cmd[DEBUG_MAX];
514 state = container_of(work, struct fiq_debugger_state, work);
516 spin_lock_irqsave(&state->work_lock, flags);
518 strlcpy(work_cmd, state->work_cmd, sizeof(work_cmd));
519 state->work_cmd[0] = '\0';
521 spin_unlock_irqrestore(&state->work_lock, flags);
524 if (!strncmp(cmd, "reboot", 6)) {
531 kernel_restart(NULL);
533 fiq_debugger_printf(&state->output, "unknown work command '%s'\n",
538 /* This function CANNOT be called in FIQ context */
539 static void fiq_debugger_irq_exec(struct fiq_debugger_state *state, char *cmd)
542 if (!strcmp(cmd, "ps"))
543 fiq_debugger_do_ps(state);
544 if (!strcmp(cmd, "sysrq"))
545 fiq_debugger_do_sysrq(state, 'h');
546 if (!strncmp(cmd, "sysrq ", 6))
547 fiq_debugger_do_sysrq(state, cmd[6]);
549 if (!strcmp(cmd, "kgdb"))
550 fiq_debugger_do_kgdb(state);
552 if (!strncmp(cmd, "reboot", 6))
553 fiq_debugger_schedule_work(state, cmd);
554 #ifdef CONFIG_ARCH_ROCKCHIP
557 memset(state->debug_buf, 0, DEBUG_MAX);
560 if (invalid_cmd == 0) {
561 state->current_pointer = (state->current_pointer-1) & CMD_COUNT;
562 if (strcmp(state->cmd_buf[state->current_pointer], state->debug_buf)) {
563 state->current_pointer = (state->current_pointer+1) & CMD_COUNT;
564 memset(state->cmd_buf[state->current_pointer], 0, DEBUG_MAX);
565 strcpy(state->cmd_buf[state->current_pointer], state->debug_buf);
567 memset(state->debug_buf, 0, DEBUG_MAX);
568 state->current_pointer = (state->current_pointer+1) & CMD_COUNT;
569 state->back_pointer = state->current_pointer;
574 #ifdef CONFIG_ARCH_ROCKCHIP
575 static char cmd_buf[][16] = {
583 #ifdef CONFIG_RK_LAST_LOG
601 static void fiq_debugger_help(struct fiq_debugger_state *state)
603 fiq_debugger_printf(&state->output,
604 "FIQ Debugger commands:\n"
606 " regs Register dump\n"
607 " allregs Extended Register dump\n"
608 " bt Stack trace\n");
609 fiq_debugger_printf(&state->output,
610 " reboot [<c>] Reboot with command <c>\n"
611 " reset [<c>] Hard reset with command <c>\n"
612 " irqs Interupt status\n"
614 " version Kernel version\n");
615 #ifdef CONFIG_RK_LAST_LOG
616 fiq_debugger_printf(&state->output,
617 " last_kmsg Last kernel log\n");
619 fiq_debugger_printf(&state->output,
620 " sleep Allow sleep while in FIQ\n"
621 " nosleep Disable sleep while in FIQ\n"
622 " console Switch terminal to console\n"
624 " cpu <number> Switch to CPU<number>\n");
625 fiq_debugger_printf(&state->output,
627 " sysrq sysrq options\n"
628 " sysrq <param> Execute sysrq with <param>\n");
630 fiq_debugger_printf(&state->output,
631 " kgdb Enter kernel debugger\n");
635 static void fiq_debugger_take_affinity(void *info)
637 struct fiq_debugger_state *state = info;
638 struct cpumask cpumask;
640 cpumask_clear(&cpumask);
641 cpumask_set_cpu(get_cpu(), &cpumask);
643 irq_set_affinity(state->uart_irq, &cpumask);
646 static void fiq_debugger_switch_cpu(struct fiq_debugger_state *state, int cpu)
648 if (!fiq_debugger_have_fiq(state))
649 smp_call_function_single(cpu, fiq_debugger_take_affinity, state,
651 #ifdef CONFIG_ARCH_ROCKCHIP
653 struct cpumask cpumask;
655 if (!cpu_online(cpu)) {
656 fiq_debugger_printf(&state->output, "cpu %d offline\n", cpu);
660 cpumask_clear(&cpumask);
661 cpumask_set_cpu(cpu, &cpumask);
663 irq_set_affinity(state->fiq, &cpumask);
664 irq_set_affinity(state->uart_irq, &cpumask);
667 state->current_cpu = cpu;
670 static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
671 const char *cmd, const struct pt_regs *regs,
674 bool signal_helper = false;
676 if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
677 fiq_debugger_help(state);
678 } else if (!strcmp(cmd, "pc")) {
679 fiq_debugger_dump_pc(&state->output, regs);
680 } else if (!strcmp(cmd, "regs")) {
681 fiq_debugger_dump_regs(&state->output, regs);
682 } else if (!strcmp(cmd, "allregs")) {
683 fiq_debugger_dump_allregs(&state->output, regs);
684 } else if (!strcmp(cmd, "bt")) {
685 fiq_debugger_dump_stacktrace(&state->output, regs, 100, svc_sp);
686 } else if (!strncmp(cmd, "reset", 5)) {
692 strlcpy(tmp_cmd, cmd, sizeof(tmp_cmd));
693 machine_restart(tmp_cmd);
695 machine_restart(NULL);
697 } else if (!strcmp(cmd, "irqs")) {
698 fiq_debugger_dump_irqs(state);
699 } else if (!strcmp(cmd, "kmsg")) {
700 fiq_debugger_dump_kernel_log(state);
701 #ifdef CONFIG_RK_LAST_LOG
702 } else if (!strcmp(cmd, "last_kmsg")) {
703 fiq_debugger_dump_last_kernel_log(state);
705 } else if (!strcmp(cmd, "version")) {
706 fiq_debugger_printf(&state->output, "%s\n", linux_banner);
707 } else if (!strcmp(cmd, "sleep")) {
708 state->no_sleep = false;
709 fiq_debugger_printf(&state->output, "enabling sleep\n");
710 } else if (!strcmp(cmd, "nosleep")) {
711 state->no_sleep = true;
712 fiq_debugger_printf(&state->output, "disabling sleep\n");
713 } else if (!strcmp(cmd, "console")) {
714 fiq_debugger_printf(&state->output, "console mode\n");
715 fiq_debugger_uart_flush(state);
716 state->console_enable = true;
717 } else if (!strcmp(cmd, "cpu")) {
718 fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
719 } else if (!strncmp(cmd, "cpu ", 4)) {
720 unsigned long cpu = 0;
721 if (strict_strtoul(cmd + 4, 10, &cpu) == 0)
722 fiq_debugger_switch_cpu(state, cpu);
724 fiq_debugger_printf(&state->output, "invalid cpu\n");
725 fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
727 if (state->debug_busy) {
728 fiq_debugger_printf(&state->output,
729 "command processor busy. trying to abort.\n");
730 state->debug_abort = -1;
732 strcpy(state->debug_cmd, cmd);
733 state->debug_busy = 1;
738 if (!state->console_enable)
739 fiq_debugger_prompt(state);
741 return signal_helper;
744 static void fiq_debugger_sleep_timer_expired(unsigned long data)
746 struct fiq_debugger_state *state = (struct fiq_debugger_state *)data;
749 spin_lock_irqsave(&state->sleep_timer_lock, flags);
750 if (state->uart_enabled && !state->no_sleep) {
751 if (state->debug_enable && !state->console_enable) {
752 state->debug_enable = false;
753 fiq_debugger_printf_nfiq(state,
754 "suspending fiq debugger\n");
756 state->ignore_next_wakeup_irq = true;
757 fiq_debugger_uart_disable(state);
758 state->uart_enabled = false;
759 fiq_debugger_enable_wakeup_irq(state);
761 wake_unlock(&state->debugger_wake_lock);
762 spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
765 static void fiq_debugger_handle_wakeup(struct fiq_debugger_state *state)
769 spin_lock_irqsave(&state->sleep_timer_lock, flags);
770 if (state->wakeup_irq >= 0 && state->ignore_next_wakeup_irq) {
771 state->ignore_next_wakeup_irq = false;
772 } else if (!state->uart_enabled) {
773 wake_lock(&state->debugger_wake_lock);
774 fiq_debugger_uart_enable(state);
775 state->uart_enabled = true;
776 fiq_debugger_disable_wakeup_irq(state);
777 mod_timer(&state->sleep_timer, jiffies + HZ / 2);
779 spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
782 static irqreturn_t fiq_debugger_wakeup_irq_handler(int irq, void *dev)
784 struct fiq_debugger_state *state = dev;
786 if (!state->no_sleep)
787 fiq_debugger_puts(state, "WAKEUP\n");
788 fiq_debugger_handle_wakeup(state);
794 void fiq_debugger_handle_console_irq_context(struct fiq_debugger_state *state)
796 #if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
797 if (state->tty_port.ops) {
799 int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
800 for (i = 0; i < count; i++) {
801 int c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
802 tty_insert_flip_char(&state->tty_port, c, TTY_NORMAL);
803 if (!fiq_debugger_ringbuf_consume(state->tty_rbuf, 1))
804 pr_warn("fiq tty failed to consume byte\n");
806 tty_flip_buffer_push(&state->tty_port);
811 static void fiq_debugger_handle_irq_context(struct fiq_debugger_state *state)
813 if (!state->no_sleep) {
816 spin_lock_irqsave(&state->sleep_timer_lock, flags);
817 wake_lock(&state->debugger_wake_lock);
818 mod_timer(&state->sleep_timer, jiffies + HZ * 5);
819 spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
821 fiq_debugger_handle_console_irq_context(state);
822 if (state->debug_busy) {
823 fiq_debugger_irq_exec(state, state->debug_cmd);
824 if (!state->console_enable)
825 fiq_debugger_prompt(state);
826 state->debug_busy = 0;
830 static int fiq_debugger_getc(struct fiq_debugger_state *state)
832 return state->pdata->uart_getc(state->pdev);
835 static int fiq_debugger_cmd_check_back(struct fiq_debugger_state *state, char c)
840 state->back_pointer = (state->back_pointer-1) & CMD_COUNT;
841 if (state->back_pointer != state->current_pointer) {
842 s = state->cmd_buf[state->back_pointer];
844 for(i = 0; i < strlen(state->debug_buf)-1; i++) {
845 state->pdata->uart_putc(state->pdev, 8);
846 state->pdata->uart_putc(state->pdev, ' ');
847 state->pdata->uart_putc(state->pdev, 8);
849 memset(state->debug_buf, 0, DEBUG_MAX);
850 strcpy(state->debug_buf, s);
851 state->debug_count = strlen(state->debug_buf);
852 fiq_debugger_printf(&state->output, state->debug_buf);
854 state->back_pointer = (state->back_pointer+1) & CMD_COUNT;
858 state->back_pointer = (state->back_pointer+1) & CMD_COUNT;
860 } else if (c == 'B') {
862 if (state->back_pointer != state->current_pointer) {
863 state->back_pointer = (state->back_pointer+1) & CMD_COUNT;
864 if(state->back_pointer == state->current_pointer){
867 s = state->cmd_buf[state->back_pointer];
869 for(i = 0; i < strlen(state->debug_buf)-1; i++) {
870 state->pdata->uart_putc(state->pdev, 8);
871 state->pdata->uart_putc(state->pdev, ' ');
872 state->pdata->uart_putc(state->pdev, 8);
874 memset(state->debug_buf, 0, DEBUG_MAX);
875 strcpy(state->debug_buf, s);
876 state->debug_count = strlen(state->debug_buf);
877 fiq_debugger_printf(&state->output, state->debug_buf);
882 for(i = 0; i < strlen(state->debug_buf)-1; i++) {
883 state->pdata->uart_putc(state->pdev, 8);
884 state->pdata->uart_putc(state->pdev, ' ');
885 state->pdata->uart_putc(state->pdev, 8);
887 memset(state->debug_buf, 0, DEBUG_MAX);
888 state->debug_count = 0;
894 static void fiq_debugger_cmd_tab(struct fiq_debugger_state *state)
899 for (i = 0; i < ARRAY_SIZE(cmd_buf); i++) {
903 for (j = 1; j <= strlen(state->debug_buf); j++) {
905 for (i = 0; i < ARRAY_SIZE(cmd_buf); i++) {
906 if (cmd_buf[i][15] == 1) {
907 if (strncmp(state->debug_buf, cmd_buf[i], j)) {
919 for (i = 0; i < ARRAY_SIZE(cmd_buf); i++) {
920 if (cmd_buf[i][15] == 1)
924 for(j = 0; j < strlen(state->debug_buf); j++) {
925 state->pdata->uart_putc(state->pdev, 8);
926 state->pdata->uart_putc(state->pdev, ' ');
927 state->pdata->uart_putc(state->pdev, 8);
929 memset(state->debug_buf, 0, DEBUG_MAX);
930 strcpy(state->debug_buf, cmd_buf[i]);
931 state->debug_count = strlen(state->debug_buf);
932 fiq_debugger_printf(&state->output, state->debug_buf);
937 static bool fiq_debugger_handle_uart_interrupt(struct fiq_debugger_state *state,
938 int this_cpu, const struct pt_regs *regs, void *svc_sp)
943 bool signal_helper = false;
944 unsigned long ms = 0;
946 if (this_cpu != state->current_cpu) {
950 if (atomic_inc_return(&state->unhandled_fiq_count) !=
951 MAX_UNHANDLED_FIQ_COUNT)
954 fiq_debugger_printf(&state->output,
955 "fiq_debugger: cpu %d not responding, "
956 "reverting to cpu %d\n", state->current_cpu,
959 atomic_set(&state->unhandled_fiq_count, 0);
960 fiq_debugger_switch_cpu(state, this_cpu);
964 state->in_fiq = true;
966 while ((c = fiq_debugger_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
968 if((recv_count0 - recv_count1) > 128) {
969 ms = jiffies_to_msecs(jiffies - jif);
972 writel_relaxed((0x00c0 << 16),
973 RK_GRF_VIRT + RK3288_GRF_UOC0_CON3);
977 recv_count1 = recv_count0;
980 if (!state->debug_enable) {
981 if ((c == 13) || (c == 10)) {
982 state->debug_enable = true;
983 state->debug_count = 0;
984 fiq_debugger_prompt(state);
986 } else if (c == FIQ_DEBUGGER_BREAK) {
987 state->console_enable = false;
988 #ifdef CONFIG_ARCH_ROCKCHIP
989 fiq_debugger_puts(state, "\nWelcome to ");
991 fiq_debugger_puts(state, "fiq debugger mode\n");
992 state->debug_count = 0;
993 #ifdef CONFIG_ARCH_ROCKCHIP
994 fiq_debugger_puts(state, "Enter ? to get command help\n");
995 state->back_pointer = CMD_COUNT;
996 state->current_pointer = CMD_COUNT;
997 memset(state->cmd_buf, 0, (CMD_COUNT+1)*DEBUG_MAX);
999 fiq_debugger_prompt(state);
1000 #ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
1001 } else if (state->console_enable && state->tty_rbuf) {
1002 fiq_debugger_ringbuf_push(state->tty_rbuf, c);
1003 signal_helper = true;
1005 #ifdef CONFIG_ARCH_ROCKCHIP
1006 } else if (last_c == '[' && (c == 'A' || c == 'B' || c == 'C' || c == 'D')) {
1007 if (state->debug_count > 0) {
1008 state->debug_count--;
1009 state->pdata->uart_putc(state->pdev, 8);
1010 state->pdata->uart_putc(state->pdev, ' ');
1011 state->pdata->uart_putc(state->pdev, 8);
1013 fiq_debugger_cmd_check_back(state, c);
1015 } else if (c == 9) {
1016 fiq_debugger_cmd_tab(state);
1018 } else if ((c >= ' ') && (c < 127)) {
1019 if (state->debug_count < (DEBUG_MAX - 1)) {
1020 state->debug_buf[state->debug_count++] = c;
1021 fiq_debugger_putc(state, c);
1023 } else if ((c == 8) || (c == 127)) {
1024 if (state->debug_count > 0) {
1025 state->debug_count--;
1026 fiq_debugger_putc(state, 8);
1027 fiq_debugger_putc(state, ' ');
1028 fiq_debugger_putc(state, 8);
1030 } else if ((c == 13) || (c == 10)) {
1031 if (c == '\r' || (c == '\n' && last_c != '\r')) {
1032 fiq_debugger_putc(state, '\r');
1033 fiq_debugger_putc(state, '\n');
1035 if (state->debug_count) {
1036 state->debug_buf[state->debug_count] = 0;
1037 state->debug_count = 0;
1039 fiq_debugger_fiq_exec(state,
1042 #ifdef CONFIG_ARCH_ROCKCHIP
1043 if (signal_helper == false) {
1044 state->current_pointer = (state->current_pointer-1) & CMD_COUNT;
1045 if (strcmp(state->cmd_buf[state->current_pointer], state->debug_buf)) {
1046 state->current_pointer = (state->current_pointer+1) & CMD_COUNT;
1047 memset(state->cmd_buf[state->current_pointer], 0, DEBUG_MAX);
1048 strcpy(state->cmd_buf[state->current_pointer], state->debug_buf);
1050 memset(state->debug_buf, 0, DEBUG_MAX);
1051 state->current_pointer = (state->current_pointer+1) & CMD_COUNT;
1052 state->back_pointer = state->current_pointer;
1056 fiq_debugger_prompt(state);
1061 if (!state->console_enable)
1062 fiq_debugger_uart_flush(state);
1063 if (state->pdata->fiq_ack)
1064 state->pdata->fiq_ack(state->pdev, state->fiq);
1066 /* poke sleep timer if necessary */
1067 if (state->debug_enable && !state->no_sleep)
1068 signal_helper = true;
1070 atomic_set(&state->unhandled_fiq_count, 0);
1071 state->in_fiq = false;
1073 return signal_helper;
1076 #ifdef CONFIG_FIQ_GLUE
1077 static void fiq_debugger_fiq(struct fiq_glue_handler *h,
1078 void *regs, void *svc_sp)
1080 struct fiq_debugger_state *state =
1081 container_of(h, struct fiq_debugger_state, handler);
1082 unsigned int this_cpu = THREAD_INFO(svc_sp)->cpu;
1085 /* RK2928 USB-UART function, otg dp/dm default in uart status;
1086 * connect with otg cable&usb device, dp/dm will be hi-z status
1087 * and make uart controller enter infinite fiq loop
1089 #ifdef CONFIG_RK_USB_UART
1090 if (cpu_is_rk3188()) {
1091 if (!(readl_relaxed(RK_GRF_VIRT + RK3188_GRF_SOC_STATUS0) & (1 << 13)) ||
1092 (readl_relaxed(RK_GRF_VIRT + RK3188_GRF_SOC_STATUS0) & (1 << 10))) {
1093 /* id low or bvalid high, enter usb phy */
1094 writel_relaxed((0x0300 << 16), RK_GRF_VIRT + RK3188_GRF_UOC0_CON0);
1096 } else if (cpu_is_rk3288()) {
1097 if (!(readl_relaxed(RK_GRF_VIRT + RK3288_GRF_SOC_STATUS2) & (1 << 17)) ||
1098 (readl_relaxed(RK_GRF_VIRT + RK3288_GRF_SOC_STATUS2) & (1 << 14))) {
1099 /* id low or bvalid high, enter usb phy */
1100 writel_relaxed((0x00c0 << 16), RK_GRF_VIRT + RK3288_GRF_UOC0_CON3);
1104 need_irq = fiq_debugger_handle_uart_interrupt(state, this_cpu, regs,
1107 fiq_debugger_force_irq(state);
1112 * When not using FIQs, we only use this single interrupt as an entry point.
1113 * This just effectively takes over the UART interrupt and does all the work
1116 static irqreturn_t fiq_debugger_uart_irq(int irq, void *dev)
1118 struct fiq_debugger_state *state = dev;
1121 fiq_debugger_handle_wakeup(state);
1123 /* handle the debugger irq in regular context */
1124 not_done = fiq_debugger_handle_uart_interrupt(state, smp_processor_id(),
1126 current_thread_info());
1128 fiq_debugger_handle_irq_context(state);
1134 * If FIQs are used, not everything can happen in fiq context.
1135 * FIQ handler does what it can and then signals this interrupt to finish the
1136 * job in irq context.
1138 static irqreturn_t fiq_debugger_signal_irq(int irq, void *dev)
1140 struct fiq_debugger_state *state = dev;
1142 if (state->pdata->force_irq_ack)
1143 state->pdata->force_irq_ack(state->pdev, state->signal_irq);
1145 fiq_debugger_handle_irq_context(state);
1150 #ifdef CONFIG_FIQ_GLUE
1151 static void fiq_debugger_resume(struct fiq_glue_handler *h)
1153 struct fiq_debugger_state *state =
1154 container_of(h, struct fiq_debugger_state, handler);
1155 if (state->pdata->uart_resume)
1156 state->pdata->uart_resume(state->pdev);
1160 #if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
1161 struct tty_driver *fiq_debugger_console_device(struct console *co, int *index)
1164 return fiq_tty_driver;
1167 static void fiq_debugger_console_write(struct console *co,
1168 const char *s, unsigned int count)
1170 struct fiq_debugger_state *state;
1171 unsigned long flags;
1173 state = container_of(co, struct fiq_debugger_state, console);
1175 if (!state->console_enable && !state->syslog_dumping)
1178 #ifdef CONFIG_RK_CONSOLE_THREAD
1179 if (state->pdata->console_write) {
1180 state->pdata->console_write(state->pdev, s, count);
1185 fiq_debugger_uart_enable(state);
1186 spin_lock_irqsave(&state->console_lock, flags);
1189 fiq_debugger_putc(state, '\r');
1190 fiq_debugger_putc(state, *s++);
1192 fiq_debugger_uart_flush(state);
1193 spin_unlock_irqrestore(&state->console_lock, flags);
1194 fiq_debugger_uart_disable(state);
1197 static struct console fiq_debugger_console = {
1199 .device = fiq_debugger_console_device,
1200 .write = fiq_debugger_console_write,
1201 .flags = CON_PRINTBUFFER | CON_ANYTIME | CON_ENABLED,
1204 int fiq_tty_open(struct tty_struct *tty, struct file *filp)
1206 int line = tty->index;
1207 struct fiq_debugger_state **states = tty->driver->driver_state;
1208 struct fiq_debugger_state *state = states[line];
1210 return tty_port_open(&state->tty_port, tty, filp);
1213 void fiq_tty_close(struct tty_struct *tty, struct file *filp)
1215 tty_port_close(tty->port, tty, filp);
1218 int fiq_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
1221 int line = tty->index;
1222 struct fiq_debugger_state **states = tty->driver->driver_state;
1223 struct fiq_debugger_state *state = states[line];
1225 if (!state->console_enable)
1228 fiq_debugger_uart_enable(state);
1229 spin_lock_irq(&state->console_lock);
1230 for (i = 0; i < count; i++)
1231 fiq_debugger_putc(state, *buf++);
1232 spin_unlock_irq(&state->console_lock);
1233 fiq_debugger_uart_disable(state);
1238 int fiq_tty_write_room(struct tty_struct *tty)
1243 #ifdef CONFIG_CONSOLE_POLL
1244 static int fiq_tty_poll_init(struct tty_driver *driver, int line, char *options)
1249 static int fiq_tty_poll_get_char(struct tty_driver *driver, int line)
1251 struct fiq_debugger_state **states = driver->driver_state;
1252 struct fiq_debugger_state *state = states[line];
1253 int c = NO_POLL_CHAR;
1255 fiq_debugger_uart_enable(state);
1256 if (fiq_debugger_have_fiq(state)) {
1257 int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
1259 c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
1260 fiq_debugger_ringbuf_consume(state->tty_rbuf, 1);
1263 c = fiq_debugger_getc(state);
1264 if (c == FIQ_DEBUGGER_NO_CHAR)
1267 fiq_debugger_uart_disable(state);
1272 static void fiq_tty_poll_put_char(struct tty_driver *driver, int line, char ch)
1274 struct fiq_debugger_state **states = driver->driver_state;
1275 struct fiq_debugger_state *state = states[line];
1276 fiq_debugger_uart_enable(state);
1277 fiq_debugger_putc(state, ch);
1278 fiq_debugger_uart_disable(state);
1282 static const struct tty_port_operations fiq_tty_port_ops;
1284 static const struct tty_operations fiq_tty_driver_ops = {
1285 .write = fiq_tty_write,
1286 .write_room = fiq_tty_write_room,
1287 .open = fiq_tty_open,
1288 .close = fiq_tty_close,
1289 #ifdef CONFIG_CONSOLE_POLL
1290 .poll_init = fiq_tty_poll_init,
1291 .poll_get_char = fiq_tty_poll_get_char,
1292 .poll_put_char = fiq_tty_poll_put_char,
1296 static int fiq_debugger_tty_init(void)
1299 struct fiq_debugger_state **states = NULL;
1301 states = kzalloc(sizeof(*states) * MAX_FIQ_DEBUGGER_PORTS, GFP_KERNEL);
1303 pr_err("Failed to allocate fiq debugger state structres\n");
1307 fiq_tty_driver = alloc_tty_driver(MAX_FIQ_DEBUGGER_PORTS);
1308 if (!fiq_tty_driver) {
1309 pr_err("Failed to allocate fiq debugger tty\n");
1311 goto err_free_state;
1314 fiq_tty_driver->owner = THIS_MODULE;
1315 fiq_tty_driver->driver_name = "fiq-debugger";
1316 fiq_tty_driver->name = "ttyFIQ";
1317 fiq_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1318 fiq_tty_driver->subtype = SERIAL_TYPE_NORMAL;
1319 fiq_tty_driver->init_termios = tty_std_termios;
1320 fiq_tty_driver->flags = TTY_DRIVER_REAL_RAW |
1321 TTY_DRIVER_DYNAMIC_DEV;
1322 fiq_tty_driver->driver_state = states;
1324 fiq_tty_driver->init_termios.c_cflag =
1325 B115200 | CS8 | CREAD | HUPCL | CLOCAL;
1326 fiq_tty_driver->init_termios.c_ispeed = 115200;
1327 fiq_tty_driver->init_termios.c_ospeed = 115200;
1329 tty_set_operations(fiq_tty_driver, &fiq_tty_driver_ops);
1331 ret = tty_register_driver(fiq_tty_driver);
1333 pr_err("Failed to register fiq tty: %d\n", ret);
1337 pr_info("Registered FIQ tty driver\n");
1341 put_tty_driver(fiq_tty_driver);
1342 fiq_tty_driver = NULL;
1348 static int fiq_debugger_tty_init_one(struct fiq_debugger_state *state)
1351 struct device *tty_dev;
1352 struct fiq_debugger_state **states = fiq_tty_driver->driver_state;
1354 states[state->pdev->id] = state;
1356 state->tty_rbuf = fiq_debugger_ringbuf_alloc(1024);
1357 if (!state->tty_rbuf) {
1358 pr_err("Failed to allocate fiq debugger ringbuf\n");
1363 tty_port_init(&state->tty_port);
1364 state->tty_port.ops = &fiq_tty_port_ops;
1366 tty_dev = tty_port_register_device(&state->tty_port, fiq_tty_driver,
1367 state->pdev->id, &state->pdev->dev);
1368 if (IS_ERR(tty_dev)) {
1369 pr_err("Failed to register fiq debugger tty device\n");
1370 ret = PTR_ERR(tty_dev);
1374 device_set_wakeup_capable(tty_dev, 1);
1376 pr_info("Registered fiq debugger ttyFIQ%d\n", state->pdev->id);
1381 fiq_debugger_ringbuf_free(state->tty_rbuf);
1382 state->tty_rbuf = NULL;
1387 static int fiq_debugger_dev_suspend(struct device *dev)
1389 struct platform_device *pdev = to_platform_device(dev);
1390 struct fiq_debugger_state *state = platform_get_drvdata(pdev);
1392 if (state->pdata->uart_dev_suspend)
1393 return state->pdata->uart_dev_suspend(pdev);
1397 static int fiq_debugger_dev_resume(struct device *dev)
1399 struct platform_device *pdev = to_platform_device(dev);
1400 struct fiq_debugger_state *state = platform_get_drvdata(pdev);
1402 if (state->pdata->uart_dev_resume)
1403 return state->pdata->uart_dev_resume(pdev);
1407 static int fiq_debugger_probe(struct platform_device *pdev)
1410 struct fiq_debugger_pdata *pdata = dev_get_platdata(&pdev->dev);
1411 struct fiq_debugger_state *state;
1415 if (pdev->id >= MAX_FIQ_DEBUGGER_PORTS)
1418 if (!pdata->uart_getc || !pdata->uart_putc)
1420 if ((pdata->uart_enable && !pdata->uart_disable) ||
1421 (!pdata->uart_enable && pdata->uart_disable))
1424 fiq = platform_get_irq_byname(pdev, "fiq");
1425 uart_irq = platform_get_irq_byname(pdev, "uart_irq");
1427 /* uart_irq mode and fiq mode are mutually exclusive, but one of them
1429 if ((uart_irq < 0 && fiq < 0) || (uart_irq >= 0 && fiq >= 0))
1431 if (fiq >= 0 && !pdata->fiq_enable)
1434 state = kzalloc(sizeof(*state), GFP_KERNEL);
1435 state->output.printf = fiq_debugger_printf;
1436 setup_timer(&state->sleep_timer, fiq_debugger_sleep_timer_expired,
1437 (unsigned long)state);
1438 state->pdata = pdata;
1440 state->no_sleep = initial_no_sleep;
1441 state->debug_enable = initial_debug_enable;
1442 state->console_enable = initial_console_enable;
1445 state->uart_irq = uart_irq;
1446 state->signal_irq = platform_get_irq_byname(pdev, "signal");
1447 state->wakeup_irq = platform_get_irq_byname(pdev, "wakeup");
1449 INIT_WORK(&state->work, fiq_debugger_work);
1450 spin_lock_init(&state->work_lock);
1452 platform_set_drvdata(pdev, state);
1454 spin_lock_init(&state->sleep_timer_lock);
1456 if (state->wakeup_irq < 0 && fiq_debugger_have_fiq(state))
1457 state->no_sleep = true;
1458 state->ignore_next_wakeup_irq = !state->no_sleep;
1460 wake_lock_init(&state->debugger_wake_lock,
1461 WAKE_LOCK_SUSPEND, "serial-debug");
1463 state->clk = clk_get(&pdev->dev, NULL);
1464 if (IS_ERR(state->clk))
1467 /* do not call pdata->uart_enable here since uart_init may still
1468 * need to do some initialization before uart_enable can work.
1469 * So, only try to manage the clock during init.
1472 clk_enable(state->clk);
1474 if (pdata->uart_init) {
1475 ret = pdata->uart_init(pdev);
1480 fiq_debugger_printf_nfiq(state,
1481 "<hit enter %sto activate fiq debugger>\n",
1482 state->no_sleep ? "" : "twice ");
1484 #ifdef CONFIG_FIQ_GLUE
1485 if (fiq_debugger_have_fiq(state)) {
1486 state->handler.fiq = fiq_debugger_fiq;
1487 state->handler.resume = fiq_debugger_resume;
1488 ret = fiq_glue_register_handler(&state->handler);
1490 pr_err("%s: could not install fiq handler\n", __func__);
1491 goto err_register_irq;
1493 #ifdef CONFIG_ARCH_ROCKCHIP
1494 //set state->fiq to secure state, so fiq is avalable
1495 gic_set_irq_secure(irq_get_irq_data(state->fiq));
1496 //set state->fiq priority a little higher than other interrupts (normal is 0xa0)
1497 gic_set_irq_priority(irq_get_irq_data(state->fiq), 0x90);
1499 pdata->fiq_enable(pdev, state->fiq, 1);
1503 ret = request_irq(state->uart_irq, fiq_debugger_uart_irq,
1504 IRQF_NO_SUSPEND, "debug", state);
1506 pr_err("%s: could not install irq handler\n", __func__);
1507 goto err_register_irq;
1510 /* for irq-only mode, we want this irq to wake us up, if it
1513 enable_irq_wake(state->uart_irq);
1517 clk_disable(state->clk);
1519 if (state->signal_irq >= 0) {
1520 ret = request_irq(state->signal_irq, fiq_debugger_signal_irq,
1521 IRQF_TRIGGER_RISING, "debug-signal", state);
1523 pr_err("serial_debugger: could not install signal_irq");
1526 if (state->wakeup_irq >= 0) {
1527 ret = request_irq(state->wakeup_irq,
1528 fiq_debugger_wakeup_irq_handler,
1529 IRQF_TRIGGER_FALLING | IRQF_DISABLED,
1530 "debug-wakeup", state);
1532 pr_err("serial_debugger: "
1533 "could not install wakeup irq\n");
1534 state->wakeup_irq = -1;
1536 ret = enable_irq_wake(state->wakeup_irq);
1538 pr_err("serial_debugger: "
1539 "could not enable wakeup\n");
1540 state->wakeup_irq_no_set_wake = true;
1544 if (state->no_sleep)
1545 fiq_debugger_handle_wakeup(state);
1547 #if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
1548 spin_lock_init(&state->console_lock);
1549 state->console = fiq_debugger_console;
1550 state->console.index = pdev->id;
1551 if (!console_set_on_cmdline)
1552 add_preferred_console(state->console.name,
1553 state->console.index, NULL);
1554 register_console(&state->console);
1555 fiq_debugger_tty_init_one(state);
1560 if (pdata->uart_free)
1561 pdata->uart_free(pdev);
1564 clk_disable(state->clk);
1566 clk_put(state->clk);
1567 wake_lock_destroy(&state->debugger_wake_lock);
1568 platform_set_drvdata(pdev, NULL);
1573 static const struct dev_pm_ops fiq_debugger_dev_pm_ops = {
1574 .suspend = fiq_debugger_dev_suspend,
1575 .resume = fiq_debugger_dev_resume,
1578 static struct platform_driver fiq_debugger_driver = {
1579 .probe = fiq_debugger_probe,
1581 .name = "fiq_debugger",
1582 .pm = &fiq_debugger_dev_pm_ops,
1586 static int __init fiq_debugger_init(void)
1588 #if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
1589 fiq_debugger_tty_init();
1591 return platform_driver_register(&fiq_debugger_driver);
1594 postcore_initcall(fiq_debugger_init);