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 #ifdef CONFIG_FIQ_DEBUGGER_EL3_TO_EL1
146 static struct fiq_debugger_state *state_tf;
149 static bool fiq_kgdb_enable;
151 static unsigned long jif = 0, recv_count0 = 0, recv_count1 = 0;
153 module_param_named(no_sleep, initial_no_sleep, bool, 0644);
154 module_param_named(debug_enable, initial_debug_enable, bool, 0644);
155 module_param_named(console_enable, initial_console_enable, bool, 0644);
156 module_param_named(kgdb_enable, fiq_kgdb_enable, bool, 0644);
158 void gic_set_irq_secure(struct irq_data *d);
159 void gic_set_irq_priority(struct irq_data *d, u8 pri);
161 #ifdef CONFIG_FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
163 void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state) {}
165 void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state) {}
168 void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state)
170 if (state->wakeup_irq < 0)
172 enable_irq(state->wakeup_irq);
173 if (!state->wakeup_irq_no_set_wake)
174 enable_irq_wake(state->wakeup_irq);
177 void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state)
179 if (state->wakeup_irq < 0)
181 disable_irq_nosync(state->wakeup_irq);
182 if (!state->wakeup_irq_no_set_wake)
183 disable_irq_wake(state->wakeup_irq);
187 static inline bool fiq_debugger_have_fiq(struct fiq_debugger_state *state)
189 return (state->fiq >= 0);
192 #if defined(CONFIG_FIQ_GLUE) || defined(CONFIG_FIQ_DEBUGGER_EL3_TO_EL1)
193 static void fiq_debugger_force_irq(struct fiq_debugger_state *state)
195 unsigned int irq = state->signal_irq;
197 if (WARN_ON(!fiq_debugger_have_fiq(state)))
201 if (state->pdata->force_irq) {
202 state->pdata->force_irq(state->pdev, irq);
204 struct irq_chip *chip = irq_get_chip(irq);
205 if (chip && chip->irq_retrigger)
206 chip->irq_retrigger(irq_get_irq_data(irq));
211 static void fiq_debugger_uart_enable(struct fiq_debugger_state *state)
214 clk_enable(state->clk);
215 if (state->pdata->uart_enable)
216 state->pdata->uart_enable(state->pdev);
219 static void fiq_debugger_uart_disable(struct fiq_debugger_state *state)
221 if (state->pdata->uart_disable)
222 state->pdata->uart_disable(state->pdev);
224 clk_disable(state->clk);
227 static void fiq_debugger_uart_flush(struct fiq_debugger_state *state)
229 if (state->pdata->uart_flush)
230 state->pdata->uart_flush(state->pdev);
233 static void fiq_debugger_putc(struct fiq_debugger_state *state, char c)
235 state->pdata->uart_putc(state->pdev, c);
238 static void fiq_debugger_puts(struct fiq_debugger_state *state, char *s)
243 fiq_debugger_putc(state, '\r');
244 fiq_debugger_putc(state, c);
248 static void fiq_debugger_prompt(struct fiq_debugger_state *state)
250 fiq_debugger_puts(state, "debug> ");
253 static void fiq_debugger_dump_kernel_log(struct fiq_debugger_state *state)
255 #ifdef CONFIG_ARCH_ROCKCHIP
261 struct kmsg_dumper dumper = { .active = true };
264 kmsg_dump_rewind_nolock(&dumper);
265 while (kmsg_dump_get_line_nolock(&dumper, true, buf,
266 sizeof(buf) - 1, &len)) {
268 fiq_debugger_puts(state, buf);
269 #ifdef CONFIG_ARCH_ROCKCHIP
275 #ifdef CONFIG_RK_LAST_LOG
276 #include <linux/ctype.h>
277 extern char *rk_last_log_get(unsigned *size);
278 static void fiq_debugger_dump_last_kernel_log(struct fiq_debugger_state *state)
281 char *s = rk_last_log_get(&size);
283 for (i = 0; i < size; i++) {
288 state->pdata->uart_putc(state->pdev, '\r');
289 state->pdata->uart_putc(state->pdev, c);
290 } else if (isascii(c) && isprint(c)) {
291 state->pdata->uart_putc(state->pdev, c);
297 static void fiq_debugger_printf(struct fiq_debugger_output *output,
298 const char *fmt, ...)
300 struct fiq_debugger_state *state;
304 state = container_of(output, struct fiq_debugger_state, output);
306 vsnprintf(buf, sizeof(buf), fmt, ap);
309 fiq_debugger_puts(state, buf);
312 /* Safe outside fiq context */
313 static int fiq_debugger_printf_nfiq(void *cookie, const char *fmt, ...)
315 struct fiq_debugger_state *state = cookie;
318 unsigned long irq_flags;
321 vsnprintf(buf, 128, fmt, ap);
324 local_irq_save(irq_flags);
325 fiq_debugger_puts(state, buf);
326 fiq_debugger_uart_flush(state);
327 local_irq_restore(irq_flags);
328 return state->debug_abort;
331 static void fiq_debugger_dump_irqs(struct fiq_debugger_state *state)
335 struct irq_desc *desc;
337 fiq_debugger_printf(&state->output,
338 "irqnr total since-last status name\n");
339 for_each_irq_desc(n, desc) {
340 struct irqaction *act = desc->action;
341 if (!act && !kstat_irqs(n))
343 fiq_debugger_printf(&state->output, "%5d: %10u %11u %8x %s\n", n,
345 kstat_irqs(n) - state->last_irqs[n],
346 desc->status_use_accessors,
347 (act && act->name) ? act->name : "???");
348 state->last_irqs[n] = kstat_irqs(n);
351 #ifdef CONFIG_ARCH_ROCKCHIP
352 for (n = 16; n < 32; n++) {
353 desc = irq_to_desc(n);
356 for (cpu = 0; cpu < NR_CPUS; cpu++) {
357 unsigned int irqs = kstat_irqs_cpu(n, cpu);
358 struct irqaction *act = desc->action;
359 const char *name = (act && act->name) ? act->name : "???";
362 fiq_debugger_printf(&state->output,
363 "%5d: %10u %11u %s (CPU%d)\n", n,
364 irqs, irqs - state->last_local_irqs[cpu][n],
366 state->last_local_irqs[cpu][n] = irqs;
369 for (n = 0; n < NR_IPI; n++) {
370 #define S(x,s) [x] = s
377 IPI_CALL_FUNC_SINGLE,
382 static const char *ipi_types[NR_IPI] = {
383 S(IPI_WAKEUP, "CPU wakeup"),
384 S(IPI_TIMER, "Timer broadcast"),
385 S(IPI_RESCHEDULE, "Rescheduling"),
386 S(IPI_CALL_FUNC, "Function call"),
387 S(IPI_CALL_FUNC_SINGLE, "Single function call"),
388 S(IPI_CPU_STOP, "CPU stop"),
389 S(IPI_COMPLETION, "Completion"),
390 S(IPI_CPU_BACKTRACE, "CPU backtrace"),
392 #elif defined(CONFIG_ARM64)
396 IPI_CALL_FUNC_SINGLE,
400 static const char *ipi_types[NR_IPI] = {
401 S(IPI_RESCHEDULE, "Rescheduling"),
402 S(IPI_CALL_FUNC, "Function call"),
403 S(IPI_CALL_FUNC_SINGLE, "Single function call"),
404 S(IPI_CPU_STOP, "CPU stop"),
405 S(IPI_TIMER, "Timer broadcast"),
409 for (cpu = 0; cpu < NR_CPUS; cpu++) {
410 unsigned int irqs = __get_irq_stat(cpu, ipi_irqs[n]);
413 fiq_debugger_printf(&state->output,
414 "%5d: %10u %11u %s (CPU%d)\n",
415 n, irqs, irqs - state->last_local_irqs[cpu][n],
417 state->last_local_irqs[cpu][n] = irqs;
423 static void fiq_debugger_do_ps(struct fiq_debugger_state *state)
425 struct task_struct *g;
426 struct task_struct *p;
428 static const char stat_nam[] = "RSDTtZX";
430 fiq_debugger_printf(&state->output, "pid ppid prio task pc\n");
431 read_lock(&tasklist_lock);
432 do_each_thread(g, p) {
433 task_state = p->state ? __ffs(p->state) + 1 : 0;
434 fiq_debugger_printf(&state->output,
435 "%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
436 fiq_debugger_printf(&state->output, "%-13.13s %c", p->comm,
437 task_state >= sizeof(stat_nam) ? '?' : stat_nam[task_state]);
438 if (task_state == TASK_RUNNING)
439 fiq_debugger_printf(&state->output, " running\n");
441 fiq_debugger_printf(&state->output, " %08lx\n",
443 } while_each_thread(g, p);
444 read_unlock(&tasklist_lock);
447 #ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
448 static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
450 state->syslog_dumping = true;
453 static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
455 state->syslog_dumping = false;
458 extern int do_syslog(int type, char __user *bug, int count);
459 static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
461 do_syslog(5 /* clear */, NULL, 0);
464 static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
466 fiq_debugger_dump_kernel_log(state);
470 static void fiq_debugger_do_sysrq(struct fiq_debugger_state *state, char rq)
472 if ((rq == 'g' || rq == 'G') && !fiq_kgdb_enable) {
473 fiq_debugger_printf(&state->output, "sysrq-g blocked\n");
476 fiq_debugger_begin_syslog_dump(state);
478 fiq_debugger_end_syslog_dump(state);
482 static void fiq_debugger_do_kgdb(struct fiq_debugger_state *state)
484 if (!fiq_kgdb_enable) {
485 fiq_debugger_printf(&state->output, "kgdb through fiq debugger not enabled\n");
489 fiq_debugger_printf(&state->output, "enabling console and triggering kgdb\n");
490 state->console_enable = true;
495 static void fiq_debugger_schedule_work(struct fiq_debugger_state *state,
500 spin_lock_irqsave(&state->work_lock, flags);
501 if (state->work_cmd[0] != '\0') {
502 fiq_debugger_printf(&state->output, "work command processor busy\n");
503 spin_unlock_irqrestore(&state->work_lock, flags);
507 strlcpy(state->work_cmd, cmd, sizeof(state->work_cmd));
508 spin_unlock_irqrestore(&state->work_lock, flags);
510 schedule_work(&state->work);
513 static void fiq_debugger_work(struct work_struct *work)
515 struct fiq_debugger_state *state;
516 char work_cmd[DEBUG_MAX];
520 state = container_of(work, struct fiq_debugger_state, work);
522 spin_lock_irqsave(&state->work_lock, flags);
524 strlcpy(work_cmd, state->work_cmd, sizeof(work_cmd));
525 state->work_cmd[0] = '\0';
527 spin_unlock_irqrestore(&state->work_lock, flags);
530 if (!strncmp(cmd, "reboot", 6)) {
537 kernel_restart(NULL);
539 fiq_debugger_printf(&state->output, "unknown work command '%s'\n",
544 /* This function CANNOT be called in FIQ context */
545 static void fiq_debugger_irq_exec(struct fiq_debugger_state *state, char *cmd)
548 if (!strcmp(cmd, "ps"))
549 fiq_debugger_do_ps(state);
550 if (!strcmp(cmd, "sysrq"))
551 fiq_debugger_do_sysrq(state, 'h');
552 if (!strncmp(cmd, "sysrq ", 6))
553 fiq_debugger_do_sysrq(state, cmd[6]);
555 if (!strcmp(cmd, "kgdb"))
556 fiq_debugger_do_kgdb(state);
558 if (!strncmp(cmd, "reboot", 6))
559 fiq_debugger_schedule_work(state, cmd);
560 #ifdef CONFIG_ARCH_ROCKCHIP
563 memset(state->debug_buf, 0, DEBUG_MAX);
566 if (invalid_cmd == 0) {
567 state->current_pointer = (state->current_pointer-1) & CMD_COUNT;
568 if (strcmp(state->cmd_buf[state->current_pointer], state->debug_buf)) {
569 state->current_pointer = (state->current_pointer+1) & CMD_COUNT;
570 memset(state->cmd_buf[state->current_pointer], 0, DEBUG_MAX);
571 strcpy(state->cmd_buf[state->current_pointer], state->debug_buf);
573 memset(state->debug_buf, 0, DEBUG_MAX);
574 state->current_pointer = (state->current_pointer+1) & CMD_COUNT;
575 state->back_pointer = state->current_pointer;
580 #ifdef CONFIG_ARCH_ROCKCHIP
581 static char cmd_buf[][16] = {
589 #ifdef CONFIG_RK_LAST_LOG
607 static void fiq_debugger_help(struct fiq_debugger_state *state)
609 fiq_debugger_printf(&state->output,
610 "FIQ Debugger commands:\n"
612 " regs Register dump\n"
613 " allregs Extended Register dump\n"
614 " bt Stack trace\n");
615 fiq_debugger_printf(&state->output,
616 " reboot [<c>] Reboot with command <c>\n"
617 " reset [<c>] Hard reset with command <c>\n"
618 " irqs Interupt status\n"
620 " version Kernel version\n");
621 #ifdef CONFIG_RK_LAST_LOG
622 fiq_debugger_printf(&state->output,
623 " last_kmsg Last kernel log\n");
625 fiq_debugger_printf(&state->output,
626 " sleep Allow sleep while in FIQ\n"
627 " nosleep Disable sleep while in FIQ\n"
628 " console Switch terminal to console\n"
630 " cpu <number> Switch to CPU<number>\n");
631 fiq_debugger_printf(&state->output,
633 " sysrq sysrq options\n"
634 " sysrq <param> Execute sysrq with <param>\n");
636 fiq_debugger_printf(&state->output,
637 " kgdb Enter kernel debugger\n");
641 static void fiq_debugger_take_affinity(void *info)
643 struct fiq_debugger_state *state = info;
644 struct cpumask cpumask;
646 cpumask_clear(&cpumask);
647 cpumask_set_cpu(get_cpu(), &cpumask);
649 irq_set_affinity(state->uart_irq, &cpumask);
652 static void fiq_debugger_switch_cpu(struct fiq_debugger_state *state, int cpu)
654 if (!fiq_debugger_have_fiq(state))
655 smp_call_function_single(cpu, fiq_debugger_take_affinity, state,
657 #ifdef CONFIG_ARCH_ROCKCHIP
659 #ifdef CONFIG_FIQ_DEBUGGER_EL3_TO_EL1
660 if (state->pdata->switch_cpu)
661 state->pdata->switch_cpu(state->pdev, cpu);
663 struct cpumask cpumask;
665 if (!cpu_online(cpu)) {
666 fiq_debugger_printf(&state->output, "cpu %d offline\n", cpu);
670 cpumask_clear(&cpumask);
671 cpumask_set_cpu(cpu, &cpumask);
673 irq_set_affinity(state->fiq, &cpumask);
674 irq_set_affinity(state->uart_irq, &cpumask);
678 state->current_cpu = cpu;
681 static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
682 const char *cmd, const struct pt_regs *regs,
685 bool signal_helper = false;
687 if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
688 fiq_debugger_help(state);
689 } else if (!strcmp(cmd, "pc")) {
690 fiq_debugger_dump_pc(&state->output, regs);
691 } else if (!strcmp(cmd, "regs")) {
692 fiq_debugger_dump_regs(&state->output, regs);
693 } else if (!strcmp(cmd, "allregs")) {
694 fiq_debugger_dump_allregs(&state->output, regs);
695 } else if (!strcmp(cmd, "bt")) {
696 fiq_debugger_dump_stacktrace(&state->output, regs, 100, svc_sp);
697 } else if (!strncmp(cmd, "reset", 5)) {
703 strlcpy(tmp_cmd, cmd, sizeof(tmp_cmd));
704 machine_restart(tmp_cmd);
706 machine_restart(NULL);
708 } else if (!strcmp(cmd, "irqs")) {
709 fiq_debugger_dump_irqs(state);
710 } else if (!strcmp(cmd, "kmsg")) {
711 fiq_debugger_dump_kernel_log(state);
712 #ifdef CONFIG_RK_LAST_LOG
713 } else if (!strcmp(cmd, "last_kmsg")) {
714 fiq_debugger_dump_last_kernel_log(state);
716 } else if (!strcmp(cmd, "version")) {
717 fiq_debugger_printf(&state->output, "%s\n", linux_banner);
718 } else if (!strcmp(cmd, "sleep")) {
719 state->no_sleep = false;
720 fiq_debugger_printf(&state->output, "enabling sleep\n");
721 } else if (!strcmp(cmd, "nosleep")) {
722 state->no_sleep = true;
723 fiq_debugger_printf(&state->output, "disabling sleep\n");
724 } else if (!strcmp(cmd, "console")) {
725 fiq_debugger_printf(&state->output, "console mode\n");
726 fiq_debugger_uart_flush(state);
727 state->console_enable = true;
728 #ifdef CONFIG_FIQ_DEBUGGER_EL3_TO_EL1
729 if (state->pdata->enable_debug)
730 state->pdata->enable_debug(state->pdev, false);
732 } else if (!strcmp(cmd, "cpu")) {
733 fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
734 } else if (!strncmp(cmd, "cpu ", 4)) {
735 unsigned long cpu = 0;
736 if (strict_strtoul(cmd + 4, 10, &cpu) == 0)
737 fiq_debugger_switch_cpu(state, cpu);
739 fiq_debugger_printf(&state->output, "invalid cpu\n");
740 fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
742 if (state->debug_busy) {
743 fiq_debugger_printf(&state->output,
744 "command processor busy. trying to abort.\n");
745 state->debug_abort = -1;
747 strcpy(state->debug_cmd, cmd);
748 state->debug_busy = 1;
753 if (!state->console_enable)
754 fiq_debugger_prompt(state);
756 return signal_helper;
759 static void fiq_debugger_sleep_timer_expired(unsigned long data)
761 struct fiq_debugger_state *state = (struct fiq_debugger_state *)data;
764 spin_lock_irqsave(&state->sleep_timer_lock, flags);
765 if (state->uart_enabled && !state->no_sleep) {
766 if (state->debug_enable && !state->console_enable) {
767 state->debug_enable = false;
768 fiq_debugger_printf_nfiq(state,
769 "suspending fiq debugger\n");
771 state->ignore_next_wakeup_irq = true;
772 fiq_debugger_uart_disable(state);
773 state->uart_enabled = false;
774 fiq_debugger_enable_wakeup_irq(state);
776 wake_unlock(&state->debugger_wake_lock);
777 spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
780 static void fiq_debugger_handle_wakeup(struct fiq_debugger_state *state)
784 spin_lock_irqsave(&state->sleep_timer_lock, flags);
785 if (state->wakeup_irq >= 0 && state->ignore_next_wakeup_irq) {
786 state->ignore_next_wakeup_irq = false;
787 } else if (!state->uart_enabled) {
788 wake_lock(&state->debugger_wake_lock);
789 fiq_debugger_uart_enable(state);
790 state->uart_enabled = true;
791 fiq_debugger_disable_wakeup_irq(state);
792 mod_timer(&state->sleep_timer, jiffies + HZ / 2);
794 spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
797 static irqreturn_t fiq_debugger_wakeup_irq_handler(int irq, void *dev)
799 struct fiq_debugger_state *state = dev;
801 if (!state->no_sleep)
802 fiq_debugger_puts(state, "WAKEUP\n");
803 fiq_debugger_handle_wakeup(state);
809 void fiq_debugger_handle_console_irq_context(struct fiq_debugger_state *state)
811 #if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
812 if (state->tty_port.ops) {
814 int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
815 for (i = 0; i < count; i++) {
816 int c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
817 tty_insert_flip_char(&state->tty_port, c, TTY_NORMAL);
818 if (!fiq_debugger_ringbuf_consume(state->tty_rbuf, 1))
819 pr_warn("fiq tty failed to consume byte\n");
821 tty_flip_buffer_push(&state->tty_port);
826 static void fiq_debugger_handle_irq_context(struct fiq_debugger_state *state)
828 if (!state->no_sleep) {
831 spin_lock_irqsave(&state->sleep_timer_lock, flags);
832 wake_lock(&state->debugger_wake_lock);
833 mod_timer(&state->sleep_timer, jiffies + HZ * 5);
834 spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
836 fiq_debugger_handle_console_irq_context(state);
837 if (state->debug_busy) {
838 fiq_debugger_irq_exec(state, state->debug_cmd);
839 if (!state->console_enable)
840 fiq_debugger_prompt(state);
841 state->debug_busy = 0;
845 static int fiq_debugger_getc(struct fiq_debugger_state *state)
847 return state->pdata->uart_getc(state->pdev);
850 static int fiq_debugger_cmd_check_back(struct fiq_debugger_state *state, char c)
855 state->back_pointer = (state->back_pointer-1) & CMD_COUNT;
856 if (state->back_pointer != state->current_pointer) {
857 s = state->cmd_buf[state->back_pointer];
859 for(i = 0; i < strlen(state->debug_buf)-1; i++) {
860 state->pdata->uart_putc(state->pdev, 8);
861 state->pdata->uart_putc(state->pdev, ' ');
862 state->pdata->uart_putc(state->pdev, 8);
864 memset(state->debug_buf, 0, DEBUG_MAX);
865 strcpy(state->debug_buf, s);
866 state->debug_count = strlen(state->debug_buf);
867 fiq_debugger_printf(&state->output, state->debug_buf);
869 state->back_pointer = (state->back_pointer+1) & CMD_COUNT;
873 state->back_pointer = (state->back_pointer+1) & CMD_COUNT;
875 } else if (c == 'B') {
877 if (state->back_pointer != state->current_pointer) {
878 state->back_pointer = (state->back_pointer+1) & CMD_COUNT;
879 if(state->back_pointer == state->current_pointer){
882 s = state->cmd_buf[state->back_pointer];
884 for(i = 0; i < strlen(state->debug_buf)-1; i++) {
885 state->pdata->uart_putc(state->pdev, 8);
886 state->pdata->uart_putc(state->pdev, ' ');
887 state->pdata->uart_putc(state->pdev, 8);
889 memset(state->debug_buf, 0, DEBUG_MAX);
890 strcpy(state->debug_buf, s);
891 state->debug_count = strlen(state->debug_buf);
892 fiq_debugger_printf(&state->output, state->debug_buf);
897 for(i = 0; i < strlen(state->debug_buf)-1; i++) {
898 state->pdata->uart_putc(state->pdev, 8);
899 state->pdata->uart_putc(state->pdev, ' ');
900 state->pdata->uart_putc(state->pdev, 8);
902 memset(state->debug_buf, 0, DEBUG_MAX);
903 state->debug_count = 0;
909 static void fiq_debugger_cmd_tab(struct fiq_debugger_state *state)
914 for (i = 0; i < ARRAY_SIZE(cmd_buf); i++) {
918 for (j = 1; j <= strlen(state->debug_buf); j++) {
920 for (i = 0; i < ARRAY_SIZE(cmd_buf); i++) {
921 if (cmd_buf[i][15] == 1) {
922 if (strncmp(state->debug_buf, cmd_buf[i], j)) {
934 for (i = 0; i < ARRAY_SIZE(cmd_buf); i++) {
935 if (cmd_buf[i][15] == 1)
939 for(j = 0; j < strlen(state->debug_buf); j++) {
940 state->pdata->uart_putc(state->pdev, 8);
941 state->pdata->uart_putc(state->pdev, ' ');
942 state->pdata->uart_putc(state->pdev, 8);
944 memset(state->debug_buf, 0, DEBUG_MAX);
945 strcpy(state->debug_buf, cmd_buf[i]);
946 state->debug_count = strlen(state->debug_buf);
947 fiq_debugger_printf(&state->output, state->debug_buf);
952 static bool fiq_debugger_handle_uart_interrupt(struct fiq_debugger_state *state,
953 int this_cpu, const struct pt_regs *regs, void *svc_sp)
958 bool signal_helper = false;
959 unsigned long ms = 0;
961 if (this_cpu != state->current_cpu) {
965 if (atomic_inc_return(&state->unhandled_fiq_count) !=
966 MAX_UNHANDLED_FIQ_COUNT)
969 fiq_debugger_printf(&state->output,
970 "fiq_debugger: cpu %d not responding, "
971 "reverting to cpu %d\n", state->current_cpu,
974 atomic_set(&state->unhandled_fiq_count, 0);
975 fiq_debugger_switch_cpu(state, this_cpu);
979 state->in_fiq = true;
981 while ((c = fiq_debugger_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
983 if((recv_count0 - recv_count1) > 128) {
984 ms = jiffies_to_msecs(jiffies - jif);
987 writel_relaxed((0x00c0 << 16),
988 RK_GRF_VIRT + RK3288_GRF_UOC0_CON3);
992 recv_count1 = recv_count0;
995 if (!state->debug_enable) {
996 if ((c == 13) || (c == 10)) {
997 state->debug_enable = true;
998 state->debug_count = 0;
999 fiq_debugger_prompt(state);
1001 } else if (c == FIQ_DEBUGGER_BREAK) {
1002 state->console_enable = false;
1003 #ifdef CONFIG_ARCH_ROCKCHIP
1004 fiq_debugger_puts(state, "\nWelcome to ");
1006 if (fiq_debugger_have_fiq(state))
1007 fiq_debugger_puts(state,
1008 "fiq debugger mode\n");
1010 fiq_debugger_puts(state,
1011 "irq debugger mode\n");
1013 state->debug_count = 0;
1014 #ifdef CONFIG_ARCH_ROCKCHIP
1015 fiq_debugger_puts(state, "Enter ? to get command help\n");
1016 state->back_pointer = CMD_COUNT;
1017 state->current_pointer = CMD_COUNT;
1018 memset(state->cmd_buf, 0, (CMD_COUNT+1)*DEBUG_MAX);
1021 #ifdef CONFIG_FIQ_DEBUGGER_EL3_TO_EL1
1022 if (state->pdata->enable_debug)
1023 state->pdata->enable_debug(state->pdev, true);
1025 fiq_debugger_prompt(state);
1026 #ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
1027 } else if (state->console_enable && state->tty_rbuf) {
1028 fiq_debugger_ringbuf_push(state->tty_rbuf, c);
1029 signal_helper = true;
1031 #ifdef CONFIG_ARCH_ROCKCHIP
1032 } else if (last_c == '[' && (c == 'A' || c == 'B' || c == 'C' || c == 'D')) {
1033 if (state->debug_count > 0) {
1034 state->debug_count--;
1035 state->pdata->uart_putc(state->pdev, 8);
1036 state->pdata->uart_putc(state->pdev, ' ');
1037 state->pdata->uart_putc(state->pdev, 8);
1039 fiq_debugger_cmd_check_back(state, c);
1041 } else if (c == 9) {
1042 fiq_debugger_cmd_tab(state);
1044 } else if ((c >= ' ') && (c < 127)) {
1045 if (state->debug_count < (DEBUG_MAX - 1)) {
1046 state->debug_buf[state->debug_count++] = c;
1047 fiq_debugger_putc(state, c);
1049 } else if ((c == 8) || (c == 127)) {
1050 if (state->debug_count > 0) {
1051 state->debug_count--;
1052 fiq_debugger_putc(state, 8);
1053 fiq_debugger_putc(state, ' ');
1054 fiq_debugger_putc(state, 8);
1056 } else if ((c == 13) || (c == 10)) {
1057 if (c == '\r' || (c == '\n' && last_c != '\r')) {
1058 fiq_debugger_putc(state, '\r');
1059 fiq_debugger_putc(state, '\n');
1061 if (state->debug_count) {
1062 state->debug_buf[state->debug_count] = 0;
1063 state->debug_count = 0;
1065 fiq_debugger_fiq_exec(state,
1068 #ifdef CONFIG_ARCH_ROCKCHIP
1069 if (signal_helper == false) {
1070 state->current_pointer = (state->current_pointer-1) & CMD_COUNT;
1071 if (strcmp(state->cmd_buf[state->current_pointer], state->debug_buf)) {
1072 state->current_pointer = (state->current_pointer+1) & CMD_COUNT;
1073 memset(state->cmd_buf[state->current_pointer], 0, DEBUG_MAX);
1074 strcpy(state->cmd_buf[state->current_pointer], state->debug_buf);
1076 memset(state->debug_buf, 0, DEBUG_MAX);
1077 state->current_pointer = (state->current_pointer+1) & CMD_COUNT;
1078 state->back_pointer = state->current_pointer;
1082 fiq_debugger_prompt(state);
1087 if (!state->console_enable)
1088 fiq_debugger_uart_flush(state);
1089 if (state->pdata->fiq_ack)
1090 state->pdata->fiq_ack(state->pdev, state->fiq);
1092 /* poke sleep timer if necessary */
1093 if (state->debug_enable && !state->no_sleep)
1094 signal_helper = true;
1096 atomic_set(&state->unhandled_fiq_count, 0);
1097 state->in_fiq = false;
1099 return signal_helper;
1102 #ifdef CONFIG_FIQ_GLUE
1103 static void fiq_debugger_fiq(struct fiq_glue_handler *h,
1104 void *regs, void *svc_sp)
1106 struct fiq_debugger_state *state =
1107 container_of(h, struct fiq_debugger_state, handler);
1108 unsigned int this_cpu = THREAD_INFO(svc_sp)->cpu;
1111 /* RK2928 USB-UART function, otg dp/dm default in uart status;
1112 * connect with otg cable&usb device, dp/dm will be hi-z status
1113 * and make uart controller enter infinite fiq loop
1115 #ifdef CONFIG_RK_USB_UART
1116 if (cpu_is_rk3188()) {
1117 if (!(readl_relaxed(RK_GRF_VIRT + RK3188_GRF_SOC_STATUS0) & (1 << 13)) ||
1118 (readl_relaxed(RK_GRF_VIRT + RK3188_GRF_SOC_STATUS0) & (1 << 10))) {
1119 /* id low or bvalid high, enter usb phy */
1120 writel_relaxed((0x0300 << 16), RK_GRF_VIRT + RK3188_GRF_UOC0_CON0);
1122 } else if (cpu_is_rk3288()) {
1123 if (!(readl_relaxed(RK_GRF_VIRT + RK3288_GRF_SOC_STATUS2) & (1 << 17)) ||
1124 (readl_relaxed(RK_GRF_VIRT + RK3288_GRF_SOC_STATUS2) & (1 << 14))) {
1125 /* id low or bvalid high, enter usb phy */
1126 writel_relaxed((0x00c0 << 16), RK_GRF_VIRT + RK3288_GRF_UOC0_CON3);
1130 need_irq = fiq_debugger_handle_uart_interrupt(state, this_cpu, regs,
1133 fiq_debugger_force_irq(state);
1138 * When not using FIQs, we only use this single interrupt as an entry point.
1139 * This just effectively takes over the UART interrupt and does all the work
1142 static irqreturn_t fiq_debugger_uart_irq(int irq, void *dev)
1144 struct fiq_debugger_state *state = dev;
1147 fiq_debugger_handle_wakeup(state);
1149 /* handle the debugger irq in regular context */
1150 not_done = fiq_debugger_handle_uart_interrupt(state, smp_processor_id(),
1152 current_thread_info());
1154 fiq_debugger_handle_irq_context(state);
1159 #ifdef CONFIG_FIQ_DEBUGGER_EL3_TO_EL1
1160 void fiq_debugger_fiq(void *regs)
1162 struct fiq_debugger_state *state = state_tf;
1167 need_irq = fiq_debugger_handle_uart_interrupt(state, smp_processor_id(),
1169 current_thread_info());
1171 fiq_debugger_force_irq(state);
1176 * If FIQs are used, not everything can happen in fiq context.
1177 * FIQ handler does what it can and then signals this interrupt to finish the
1178 * job in irq context.
1180 static irqreturn_t fiq_debugger_signal_irq(int irq, void *dev)
1182 struct fiq_debugger_state *state = dev;
1184 if (state->pdata->force_irq_ack)
1185 state->pdata->force_irq_ack(state->pdev, state->signal_irq);
1187 fiq_debugger_handle_irq_context(state);
1192 #ifdef CONFIG_FIQ_GLUE
1193 static void fiq_debugger_resume(struct fiq_glue_handler *h)
1195 struct fiq_debugger_state *state =
1196 container_of(h, struct fiq_debugger_state, handler);
1197 if (state->pdata->uart_resume)
1198 state->pdata->uart_resume(state->pdev);
1202 #if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
1203 struct tty_driver *fiq_debugger_console_device(struct console *co, int *index)
1206 return fiq_tty_driver;
1209 static void fiq_debugger_console_write(struct console *co,
1210 const char *s, unsigned int count)
1212 struct fiq_debugger_state *state;
1213 unsigned long flags;
1215 state = container_of(co, struct fiq_debugger_state, console);
1217 if (!state->console_enable && !state->syslog_dumping)
1220 #ifdef CONFIG_RK_CONSOLE_THREAD
1221 if (state->pdata->console_write) {
1222 state->pdata->console_write(state->pdev, s, count);
1227 fiq_debugger_uart_enable(state);
1228 spin_lock_irqsave(&state->console_lock, flags);
1231 fiq_debugger_putc(state, '\r');
1232 fiq_debugger_putc(state, *s++);
1234 fiq_debugger_uart_flush(state);
1235 spin_unlock_irqrestore(&state->console_lock, flags);
1236 fiq_debugger_uart_disable(state);
1239 static struct console fiq_debugger_console = {
1241 .device = fiq_debugger_console_device,
1242 .write = fiq_debugger_console_write,
1243 .flags = CON_PRINTBUFFER | CON_ANYTIME | CON_ENABLED,
1246 int fiq_tty_open(struct tty_struct *tty, struct file *filp)
1248 int line = tty->index;
1249 struct fiq_debugger_state **states = tty->driver->driver_state;
1250 struct fiq_debugger_state *state = states[line];
1252 return tty_port_open(&state->tty_port, tty, filp);
1255 void fiq_tty_close(struct tty_struct *tty, struct file *filp)
1257 tty_port_close(tty->port, tty, filp);
1260 int fiq_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
1263 int line = tty->index;
1264 struct fiq_debugger_state **states = tty->driver->driver_state;
1265 struct fiq_debugger_state *state = states[line];
1267 if (!state->console_enable)
1270 fiq_debugger_uart_enable(state);
1271 spin_lock_irq(&state->console_lock);
1272 for (i = 0; i < count; i++)
1273 fiq_debugger_putc(state, *buf++);
1274 spin_unlock_irq(&state->console_lock);
1275 fiq_debugger_uart_disable(state);
1280 int fiq_tty_write_room(struct tty_struct *tty)
1285 #ifdef CONFIG_CONSOLE_POLL
1286 static int fiq_tty_poll_init(struct tty_driver *driver, int line, char *options)
1291 static int fiq_tty_poll_get_char(struct tty_driver *driver, int line)
1293 struct fiq_debugger_state **states = driver->driver_state;
1294 struct fiq_debugger_state *state = states[line];
1295 int c = NO_POLL_CHAR;
1297 fiq_debugger_uart_enable(state);
1298 if (fiq_debugger_have_fiq(state)) {
1299 int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
1301 c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
1302 fiq_debugger_ringbuf_consume(state->tty_rbuf, 1);
1305 c = fiq_debugger_getc(state);
1306 if (c == FIQ_DEBUGGER_NO_CHAR)
1309 fiq_debugger_uart_disable(state);
1314 static void fiq_tty_poll_put_char(struct tty_driver *driver, int line, char ch)
1316 struct fiq_debugger_state **states = driver->driver_state;
1317 struct fiq_debugger_state *state = states[line];
1318 fiq_debugger_uart_enable(state);
1319 fiq_debugger_putc(state, ch);
1320 fiq_debugger_uart_disable(state);
1324 static const struct tty_port_operations fiq_tty_port_ops;
1326 static const struct tty_operations fiq_tty_driver_ops = {
1327 .write = fiq_tty_write,
1328 .write_room = fiq_tty_write_room,
1329 .open = fiq_tty_open,
1330 .close = fiq_tty_close,
1331 #ifdef CONFIG_CONSOLE_POLL
1332 .poll_init = fiq_tty_poll_init,
1333 .poll_get_char = fiq_tty_poll_get_char,
1334 .poll_put_char = fiq_tty_poll_put_char,
1338 static int fiq_debugger_tty_init(void)
1341 struct fiq_debugger_state **states = NULL;
1343 states = kzalloc(sizeof(*states) * MAX_FIQ_DEBUGGER_PORTS, GFP_KERNEL);
1345 pr_err("Failed to allocate fiq debugger state structres\n");
1349 fiq_tty_driver = alloc_tty_driver(MAX_FIQ_DEBUGGER_PORTS);
1350 if (!fiq_tty_driver) {
1351 pr_err("Failed to allocate fiq debugger tty\n");
1353 goto err_free_state;
1356 fiq_tty_driver->owner = THIS_MODULE;
1357 fiq_tty_driver->driver_name = "fiq-debugger";
1358 fiq_tty_driver->name = "ttyFIQ";
1359 fiq_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1360 fiq_tty_driver->subtype = SERIAL_TYPE_NORMAL;
1361 fiq_tty_driver->init_termios = tty_std_termios;
1362 fiq_tty_driver->flags = TTY_DRIVER_REAL_RAW |
1363 TTY_DRIVER_DYNAMIC_DEV;
1364 fiq_tty_driver->driver_state = states;
1366 fiq_tty_driver->init_termios.c_cflag =
1367 B115200 | CS8 | CREAD | HUPCL | CLOCAL;
1368 fiq_tty_driver->init_termios.c_ispeed = 115200;
1369 fiq_tty_driver->init_termios.c_ospeed = 115200;
1371 tty_set_operations(fiq_tty_driver, &fiq_tty_driver_ops);
1373 ret = tty_register_driver(fiq_tty_driver);
1375 pr_err("Failed to register fiq tty: %d\n", ret);
1379 pr_info("Registered FIQ tty driver\n");
1383 put_tty_driver(fiq_tty_driver);
1384 fiq_tty_driver = NULL;
1390 static int fiq_debugger_tty_init_one(struct fiq_debugger_state *state)
1393 struct device *tty_dev;
1394 struct fiq_debugger_state **states = fiq_tty_driver->driver_state;
1396 states[state->pdev->id] = state;
1398 state->tty_rbuf = fiq_debugger_ringbuf_alloc(1024);
1399 if (!state->tty_rbuf) {
1400 pr_err("Failed to allocate fiq debugger ringbuf\n");
1405 tty_port_init(&state->tty_port);
1406 state->tty_port.ops = &fiq_tty_port_ops;
1408 tty_dev = tty_port_register_device(&state->tty_port, fiq_tty_driver,
1409 state->pdev->id, &state->pdev->dev);
1410 if (IS_ERR(tty_dev)) {
1411 pr_err("Failed to register fiq debugger tty device\n");
1412 ret = PTR_ERR(tty_dev);
1416 device_set_wakeup_capable(tty_dev, 1);
1418 pr_info("Registered fiq debugger ttyFIQ%d\n", state->pdev->id);
1423 fiq_debugger_ringbuf_free(state->tty_rbuf);
1424 state->tty_rbuf = NULL;
1429 static int fiq_debugger_dev_suspend(struct device *dev)
1431 struct platform_device *pdev = to_platform_device(dev);
1432 struct fiq_debugger_state *state = platform_get_drvdata(pdev);
1434 if (state->pdata->uart_dev_suspend)
1435 return state->pdata->uart_dev_suspend(pdev);
1439 static int fiq_debugger_dev_resume(struct device *dev)
1441 struct platform_device *pdev = to_platform_device(dev);
1442 struct fiq_debugger_state *state = platform_get_drvdata(pdev);
1444 if (state->pdata->uart_dev_resume)
1445 return state->pdata->uart_dev_resume(pdev);
1449 static int fiq_debugger_probe(struct platform_device *pdev)
1452 struct fiq_debugger_pdata *pdata = dev_get_platdata(&pdev->dev);
1453 struct fiq_debugger_state *state;
1457 if (pdev->id >= MAX_FIQ_DEBUGGER_PORTS)
1460 if (!pdata->uart_getc || !pdata->uart_putc)
1462 if ((pdata->uart_enable && !pdata->uart_disable) ||
1463 (!pdata->uart_enable && pdata->uart_disable))
1466 fiq = platform_get_irq_byname(pdev, "fiq");
1467 uart_irq = platform_get_irq_byname(pdev, "uart_irq");
1469 /* uart_irq mode and fiq mode are mutually exclusive, but one of them
1471 if ((uart_irq < 0 && fiq < 0) || (uart_irq >= 0 && fiq >= 0))
1473 if (fiq >= 0 && !pdata->fiq_enable)
1476 state = kzalloc(sizeof(*state), GFP_KERNEL);
1477 state->output.printf = fiq_debugger_printf;
1478 setup_timer(&state->sleep_timer, fiq_debugger_sleep_timer_expired,
1479 (unsigned long)state);
1480 state->pdata = pdata;
1482 state->no_sleep = initial_no_sleep;
1483 state->debug_enable = initial_debug_enable;
1484 state->console_enable = initial_console_enable;
1487 #ifdef CONFIG_FIQ_DEBUGGER_EL3_TO_EL1
1489 state->uart_irq = fiq;
1491 state->uart_irq = uart_irq;
1493 state->uart_irq = uart_irq;
1496 state->signal_irq = platform_get_irq_byname(pdev, "signal");
1497 state->wakeup_irq = platform_get_irq_byname(pdev, "wakeup");
1499 INIT_WORK(&state->work, fiq_debugger_work);
1500 spin_lock_init(&state->work_lock);
1502 platform_set_drvdata(pdev, state);
1504 spin_lock_init(&state->sleep_timer_lock);
1506 if (state->wakeup_irq < 0 && fiq_debugger_have_fiq(state))
1507 state->no_sleep = true;
1508 state->ignore_next_wakeup_irq = !state->no_sleep;
1510 wake_lock_init(&state->debugger_wake_lock,
1511 WAKE_LOCK_SUSPEND, "serial-debug");
1513 state->clk = clk_get(&pdev->dev, NULL);
1514 if (IS_ERR(state->clk))
1517 /* do not call pdata->uart_enable here since uart_init may still
1518 * need to do some initialization before uart_enable can work.
1519 * So, only try to manage the clock during init.
1522 clk_enable(state->clk);
1524 if (pdata->uart_init) {
1525 ret = pdata->uart_init(pdev);
1530 fiq_debugger_printf_nfiq(state,
1531 "<hit enter %sto activate fiq debugger>\n",
1532 state->no_sleep ? "" : "twice ");
1534 #ifdef CONFIG_FIQ_GLUE
1535 if (fiq_debugger_have_fiq(state)) {
1536 state->handler.fiq = fiq_debugger_fiq;
1537 state->handler.resume = fiq_debugger_resume;
1538 ret = fiq_glue_register_handler(&state->handler);
1540 pr_err("%s: could not install fiq handler\n", __func__);
1541 goto err_register_irq;
1543 #ifdef CONFIG_ARCH_ROCKCHIP
1544 //set state->fiq to secure state, so fiq is avalable
1545 gic_set_irq_secure(irq_get_irq_data(state->fiq));
1546 //set state->fiq priority a little higher than other interrupts (normal is 0xa0)
1547 gic_set_irq_priority(irq_get_irq_data(state->fiq), 0x90);
1549 pdata->fiq_enable(pdev, state->fiq, 1);
1553 ret = request_irq(state->uart_irq, fiq_debugger_uart_irq,
1554 IRQF_NO_SUSPEND, "debug", state);
1556 pr_err("%s: could not install irq handler\n", __func__);
1557 goto err_register_irq;
1560 /* for irq-only mode, we want this irq to wake us up, if it
1563 enable_irq_wake(state->uart_irq);
1567 clk_disable(state->clk);
1569 if (state->signal_irq >= 0) {
1570 ret = request_irq(state->signal_irq, fiq_debugger_signal_irq,
1571 IRQF_TRIGGER_RISING, "debug-signal", state);
1573 pr_err("serial_debugger: could not install signal_irq");
1576 if (state->wakeup_irq >= 0) {
1577 ret = request_irq(state->wakeup_irq,
1578 fiq_debugger_wakeup_irq_handler,
1579 IRQF_TRIGGER_FALLING | IRQF_DISABLED,
1580 "debug-wakeup", state);
1582 pr_err("serial_debugger: "
1583 "could not install wakeup irq\n");
1584 state->wakeup_irq = -1;
1586 ret = enable_irq_wake(state->wakeup_irq);
1588 pr_err("serial_debugger: "
1589 "could not enable wakeup\n");
1590 state->wakeup_irq_no_set_wake = true;
1594 if (state->no_sleep)
1595 fiq_debugger_handle_wakeup(state);
1597 #ifdef CONFIG_FIQ_DEBUGGER_EL3_TO_EL1
1601 #if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
1602 spin_lock_init(&state->console_lock);
1603 state->console = fiq_debugger_console;
1604 state->console.index = pdev->id;
1605 if (!console_set_on_cmdline)
1606 add_preferred_console(state->console.name,
1607 state->console.index, NULL);
1608 register_console(&state->console);
1609 fiq_debugger_tty_init_one(state);
1614 if (pdata->uart_free)
1615 pdata->uart_free(pdev);
1618 clk_disable(state->clk);
1620 clk_put(state->clk);
1621 wake_lock_destroy(&state->debugger_wake_lock);
1622 platform_set_drvdata(pdev, NULL);
1627 static const struct dev_pm_ops fiq_debugger_dev_pm_ops = {
1628 .suspend = fiq_debugger_dev_suspend,
1629 .resume = fiq_debugger_dev_resume,
1632 static struct platform_driver fiq_debugger_driver = {
1633 .probe = fiq_debugger_probe,
1635 .name = "fiq_debugger",
1636 .pm = &fiq_debugger_dev_pm_ops,
1640 static int __init fiq_debugger_init(void)
1642 #if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
1643 fiq_debugger_tty_init();
1645 return platform_driver_register(&fiq_debugger_driver);
1648 postcore_initcall(fiq_debugger_init);