1730 lines
44 KiB
C
1730 lines
44 KiB
C
/*
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* drivers/staging/android/fiq_debugger.c
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*
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* Serial Debugger Interface accessed through an FIQ interrupt.
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*
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* Copyright (C) 2008 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/stdarg.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/console.h>
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#include <linux/interrupt.h>
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#include <linux/clk.h>
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#include <linux/platform_device.h>
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#include <linux/kernel_stat.h>
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#include <linux/kmsg_dump.h>
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#include <linux/irq.h>
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#include <linux/delay.h>
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#include <linux/reboot.h>
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#include <linux/sched/signal.h>
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#include <linux/slab.h>
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#include <linux/smp.h>
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#include <linux/timer.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/ptrace.h>
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#include <linux/proc_fs.h>
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#ifdef CONFIG_FIQ_DEBUGGER_TRUST_ZONE
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#include <linux/rockchip/rockchip_sip.h>
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#include "rk_fiq_debugger.h"
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#endif
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#ifdef CONFIG_FIQ_GLUE
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#include <asm/fiq_glue.h>
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#endif
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#ifdef CONFIG_FIQ_DEBUGGER_UART_OVERLAY
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#include <linux/of.h>
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#endif
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#include <linux/uaccess.h>
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#include <linux/cpuhotplug.h>
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#include "fiq_debugger.h"
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#include "fiq_debugger_priv.h"
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#include "fiq_debugger_ringbuf.h"
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#ifdef CONFIG_ROCKCHIP_DEBUG
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#include "../rockchip_debug.h"
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#endif
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#define DEBUG_MAX 64
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#define CMD_COUNT 0x0f
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#define MAX_UNHANDLED_FIQ_COUNT 1000000
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#ifdef CONFIG_ARCH_ROCKCHIP
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#define MAX_FIQ_DEBUGGER_PORTS 1
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#else
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#define MAX_FIQ_DEBUGGER_PORTS 4
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#endif
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struct fiq_debugger_state {
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#ifdef CONFIG_FIQ_GLUE
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struct fiq_glue_handler handler;
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#endif
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struct fiq_debugger_output output;
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int fiq;
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int uart_irq;
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int signal_irq;
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int wakeup_irq;
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bool wakeup_irq_no_set_wake;
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struct clk *clk;
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struct fiq_debugger_pdata *pdata;
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struct platform_device *pdev;
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char debug_cmd[DEBUG_MAX];
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int debug_busy;
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int debug_abort;
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char debug_buf[DEBUG_MAX];
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int debug_count;
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#ifdef CONFIG_ARCH_ROCKCHIP
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char cmd_buf[CMD_COUNT + 1][DEBUG_MAX];
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int back_pointer;
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int current_pointer;
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#endif
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bool no_sleep;
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bool debug_enable;
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bool ignore_next_wakeup_irq;
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struct timer_list sleep_timer;
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spinlock_t sleep_timer_lock;
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bool uart_enabled;
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struct wakeup_source debugger_wake_src;
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bool console_enable;
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int current_cpu;
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atomic_t unhandled_fiq_count;
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bool in_fiq;
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struct work_struct work;
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spinlock_t work_lock;
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char work_cmd[DEBUG_MAX];
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#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
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spinlock_t console_lock;
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struct console console;
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struct tty_port tty_port;
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struct fiq_debugger_ringbuf *tty_rbuf;
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bool syslog_dumping;
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#endif
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#ifdef CONFIG_ARCH_ROCKCHIP
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unsigned int last_irqs[1024];
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unsigned int last_local_irqs[NR_CPUS][32];
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#else
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unsigned int last_irqs[NR_IRQS];
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unsigned int last_local_timer_irqs[NR_CPUS];
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#endif
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};
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#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
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static struct tty_driver *fiq_tty_driver;
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#endif
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#ifdef CONFIG_FIQ_DEBUGGER_NO_SLEEP
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static bool initial_no_sleep = true;
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#else
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static bool initial_no_sleep;
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#endif
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#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
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static bool initial_debug_enable = true;
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static bool initial_console_enable = true;
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#else
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static bool initial_debug_enable;
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static bool initial_console_enable;
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#endif
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static struct fiq_debugger_state *g_state;
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static bool fiq_kgdb_enable;
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static bool fiq_debugger_disable;
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module_param_named(no_sleep, initial_no_sleep, bool, 0644);
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module_param_named(debug_enable, initial_debug_enable, bool, 0644);
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module_param_named(console_enable, initial_console_enable, bool, 0644);
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module_param_named(kgdb_enable, fiq_kgdb_enable, bool, 0644);
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module_param_named(disable, fiq_debugger_disable, bool, 0644);
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#ifdef CONFIG_ARM64
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#include "fiq_debugger_arm64.c"
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#else
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#include "fiq_debugger_arm.c"
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#endif
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#ifdef CONFIG_FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
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static inline
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void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state) {}
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static inline
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void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state) {}
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#else
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static inline
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void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state)
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{
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if (state->wakeup_irq < 0)
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return;
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enable_irq(state->wakeup_irq);
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if (!state->wakeup_irq_no_set_wake)
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enable_irq_wake(state->wakeup_irq);
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}
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static inline
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void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state)
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{
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if (state->wakeup_irq < 0)
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return;
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disable_irq_nosync(state->wakeup_irq);
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if (!state->wakeup_irq_no_set_wake)
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disable_irq_wake(state->wakeup_irq);
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}
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#endif
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static inline bool fiq_debugger_have_fiq(struct fiq_debugger_state *state)
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{
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return (state->fiq >= 0);
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}
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static void fiq_debugger_force_irq(struct fiq_debugger_state *state)
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{
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unsigned int irq = state->signal_irq;
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if (irq < 0)
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return;
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if (state->pdata->force_irq) {
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state->pdata->force_irq(state->pdev, irq);
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} else {
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struct irq_chip *chip = irq_get_chip(irq);
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if (chip && chip->irq_retrigger)
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chip->irq_retrigger(irq_get_irq_data(irq));
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}
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}
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static void fiq_debugger_uart_enable(struct fiq_debugger_state *state)
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{
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if (state->clk)
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clk_enable(state->clk);
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if (state->pdata->uart_enable)
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state->pdata->uart_enable(state->pdev);
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}
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static void fiq_debugger_uart_disable(struct fiq_debugger_state *state)
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{
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if (state->pdata->uart_disable)
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state->pdata->uart_disable(state->pdev);
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if (state->clk)
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clk_disable(state->clk);
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}
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static void fiq_debugger_uart_flush(struct fiq_debugger_state *state)
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{
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if (state->pdata->uart_flush)
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state->pdata->uart_flush(state->pdev);
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}
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static void fiq_debugger_putc(struct fiq_debugger_state *state, char c)
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{
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if (state->pdata->uart_putc)
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state->pdata->uart_putc(state->pdev, c);
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}
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static void fiq_debugger_puts(struct fiq_debugger_state *state, char *s)
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{
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unsigned c;
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while ((c = *s++)) {
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if (c == '\n')
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fiq_debugger_putc(state, '\r');
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fiq_debugger_putc(state, c);
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}
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}
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static void fiq_debugger_prompt(struct fiq_debugger_state *state)
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{
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fiq_debugger_puts(state, "debug> ");
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}
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#ifndef CONFIG_FIQ_DEBUGGER_MODULE
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static void fiq_debugger_dump_kernel_log(struct fiq_debugger_state *state)
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{
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char buf[512];
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size_t len;
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struct kmsg_dump_iter iter;
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kmsg_dump_rewind(&iter);
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while (kmsg_dump_get_line(&iter, true, buf,
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sizeof(buf) - 1, &len)) {
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buf[len] = 0;
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fiq_debugger_puts(state, buf);
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}
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}
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#endif
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__printf(2, 3)
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static void fiq_debugger_printf(struct fiq_debugger_output *output,
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const char *fmt, ...)
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{
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struct fiq_debugger_state *state;
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char buf[256];
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va_list ap;
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state = container_of(output, struct fiq_debugger_state, output);
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va_start(ap, fmt);
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vsnprintf(buf, sizeof(buf), fmt, ap);
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va_end(ap);
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fiq_debugger_puts(state, buf);
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}
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/* Safe outside fiq context */
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__printf(2, 3)
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static int fiq_debugger_printf_nfiq(void *cookie, const char *fmt, ...)
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{
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struct fiq_debugger_state *state = cookie;
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char buf[256];
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va_list ap;
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unsigned long irq_flags;
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va_start(ap, fmt);
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vsnprintf(buf, 128, fmt, ap);
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va_end(ap);
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local_irq_save(irq_flags);
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fiq_debugger_puts(state, buf);
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fiq_debugger_uart_flush(state);
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local_irq_restore(irq_flags);
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return state->debug_abort;
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}
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#ifndef CONFIG_FIQ_DEBUGGER_MODULE
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static void fiq_debugger_dump_irqs(struct fiq_debugger_state *state)
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{
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int n;
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struct irq_desc *desc;
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fiq_debugger_printf(&state->output,
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"irqnr total since-last status name\n");
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for_each_irq_desc(n, desc) {
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struct irqaction *act = desc->action;
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if (!act && !kstat_irqs_usr(n))
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continue;
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fiq_debugger_printf(&state->output, "%5d: %10u %11u %8x %s\n", n,
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kstat_irqs_usr(n),
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kstat_irqs_usr(n) - state->last_irqs[n],
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desc->status_use_accessors,
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(act && act->name) ? act->name : "???");
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state->last_irqs[n] = kstat_irqs_usr(n);
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}
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}
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#endif
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#ifndef CONFIG_FIQ_DEBUGGER_MODULE
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static void fiq_debugger_do_ps(struct fiq_debugger_state *state)
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{
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struct task_struct *g;
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struct task_struct *p;
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unsigned task_state;
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static const char stat_nam[] = "RSDTtZX";
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fiq_debugger_printf(&state->output, "pid ppid prio task pc\n");
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read_lock(&tasklist_lock);
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do_each_thread(g, p) {
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task_state = p->__state ? __ffs(p->__state) + 1 : 0;
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fiq_debugger_printf(&state->output,
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"%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
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fiq_debugger_printf(&state->output, "%-13.13s %c", p->comm,
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task_state >= sizeof(stat_nam) ? '?' : stat_nam[task_state]);
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if (task_state == TASK_RUNNING)
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fiq_debugger_printf(&state->output, " running\n");
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else
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fiq_debugger_printf(&state->output, " %08lx\n",
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thread_saved_pc(p));
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} while_each_thread(g, p);
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read_unlock(&tasklist_lock);
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}
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#endif
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#ifndef CONFIG_FIQ_DEBUGGER_MODULE
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#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
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static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
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{
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state->syslog_dumping = true;
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}
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static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
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{
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state->syslog_dumping = false;
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}
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#else
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extern int do_syslog(int type, char __user *bug, int count);
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static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
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{
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do_syslog(5 /* clear */, NULL, 0);
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}
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static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
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{
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fiq_debugger_dump_kernel_log(state);
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}
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#endif
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#endif
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#ifndef CONFIG_FIQ_DEBUGGER_MODULE
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static void fiq_debugger_do_sysrq(struct fiq_debugger_state *state, char rq)
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{
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if ((rq == 'g' || rq == 'G') && !fiq_kgdb_enable) {
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fiq_debugger_printf(&state->output, "sysrq-g blocked\n");
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return;
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}
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fiq_debugger_begin_syslog_dump(state);
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__handle_sysrq(rq, false);
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fiq_debugger_end_syslog_dump(state);
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}
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#endif
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#ifdef CONFIG_KGDB
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static void fiq_debugger_do_kgdb(struct fiq_debugger_state *state)
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{
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if (!fiq_kgdb_enable) {
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fiq_debugger_printf(&state->output, "kgdb through fiq debugger not enabled\n");
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return;
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}
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fiq_debugger_printf(&state->output, "enabling console and triggering kgdb\n");
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state->console_enable = true;
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handle_sysrq('g');
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}
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#endif
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static void fiq_debugger_schedule_work(struct fiq_debugger_state *state,
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char *cmd)
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{
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unsigned long flags;
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spin_lock_irqsave(&state->work_lock, flags);
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if (state->work_cmd[0] != '\0') {
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fiq_debugger_printf(&state->output, "work command processor busy\n");
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spin_unlock_irqrestore(&state->work_lock, flags);
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return;
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}
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strlcpy(state->work_cmd, cmd, sizeof(state->work_cmd));
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spin_unlock_irqrestore(&state->work_lock, flags);
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schedule_work(&state->work);
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}
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static void fiq_debugger_work(struct work_struct *work)
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{
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struct fiq_debugger_state *state;
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char work_cmd[DEBUG_MAX];
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char *cmd;
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unsigned long flags;
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state = container_of(work, struct fiq_debugger_state, work);
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spin_lock_irqsave(&state->work_lock, flags);
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strlcpy(work_cmd, state->work_cmd, sizeof(work_cmd));
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state->work_cmd[0] = '\0';
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spin_unlock_irqrestore(&state->work_lock, flags);
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cmd = work_cmd;
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if (!strncmp(cmd, "reboot", 6)) {
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cmd += 6;
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while (*cmd == ' ')
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cmd++;
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if (*cmd != '\0')
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kernel_restart(cmd);
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else
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kernel_restart(NULL);
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} else {
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fiq_debugger_printf(&state->output, "unknown work command '%s'\n",
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work_cmd);
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}
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}
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/* This function CANNOT be called in FIQ context */
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static void fiq_debugger_irq_exec(struct fiq_debugger_state *state, char *cmd)
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{
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int invalid_cmd = 0;
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#ifndef CONFIG_FIQ_DEBUGGER_MODULE
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if (!strcmp(cmd, "ps"))
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fiq_debugger_do_ps(state);
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if (!strcmp(cmd, "sysrq"))
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fiq_debugger_do_sysrq(state, 'h');
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if (!strncmp(cmd, "sysrq ", 6))
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fiq_debugger_do_sysrq(state, cmd[6]);
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#endif
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#ifdef CONFIG_KGDB
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if (!strcmp(cmd, "kgdb"))
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fiq_debugger_do_kgdb(state);
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#endif
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if (!strncmp(cmd, "reboot", 6))
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fiq_debugger_schedule_work(state, cmd);
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#ifdef CONFIG_ARCH_ROCKCHIP
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else {
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invalid_cmd = 1;
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memset(state->debug_buf, 0, DEBUG_MAX);
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}
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if (invalid_cmd == 0) {
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state->current_pointer =
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(state->current_pointer - 1) & CMD_COUNT;
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if (strcmp(state->cmd_buf[state->current_pointer], state->debug_buf)) {
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state->current_pointer =
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(state->current_pointer + 1) & CMD_COUNT;
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memset(state->cmd_buf[state->current_pointer], 0, DEBUG_MAX);
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strcpy(state->cmd_buf[state->current_pointer], state->debug_buf);
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}
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memset(state->debug_buf, 0, DEBUG_MAX);
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state->current_pointer = (state->current_pointer + 1) & CMD_COUNT;
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state->back_pointer = state->current_pointer;
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}
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#endif
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}
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#ifdef CONFIG_ARCH_ROCKCHIP
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static char cmd_buf[][16] = {
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{"pc"},
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{"regs"},
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{"allregs"},
|
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{"bt"},
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{"reboot"},
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#ifdef CONFIG_ROCKCHIP_DEBUG
|
|
{"pcsr"},
|
|
#endif
|
|
{"sleep"},
|
|
{"nosleep"},
|
|
{"console"},
|
|
{"cpu"},
|
|
#ifndef CONFIG_FIQ_DEBUGGER_MODULE
|
|
{"reset"},
|
|
{"irqs"},
|
|
{"kmsg"},
|
|
{"version"},
|
|
{"ps"},
|
|
{"sysrq"},
|
|
#endif
|
|
|
|
#ifdef CONFIG_KGDB
|
|
{"kgdb"},
|
|
#endif
|
|
};
|
|
#endif
|
|
|
|
static void fiq_debugger_help(struct fiq_debugger_state *state)
|
|
{
|
|
fiq_debugger_printf(&state->output,
|
|
"FIQ Debugger commands:\n"
|
|
" pc PC status\n"
|
|
" regs Register dump\n"
|
|
" allregs Extended Register dump\n"
|
|
" bt Stack trace\n"
|
|
#ifdef CONFIG_ROCKCHIP_DEBUG
|
|
" pcsr Dump all cpus pc by DBGPCSR\n"
|
|
#endif
|
|
" cpu Current CPU\n"
|
|
" cpu <number> Switch to CPU<number>\n"
|
|
" reboot [<c>] Reboot with command <c>\n");
|
|
|
|
fiq_debugger_printf(&state->output,
|
|
" sleep Allow sleep while in FIQ\n"
|
|
" nosleep Disable sleep while in FIQ\n"
|
|
" console Switch terminal to console\n");
|
|
|
|
#ifndef CONFIG_FIQ_DEBUGGER_MODULE
|
|
fiq_debugger_printf(&state->output,
|
|
" reset [<c>] Hard reset with command <c>\n"
|
|
" irqs Interrupt status\n"
|
|
" kmsg Kernel log\n"
|
|
" version Kernel version\n");
|
|
|
|
fiq_debugger_printf(&state->output,
|
|
" ps Process list\n"
|
|
" sysrq sysrq options\n"
|
|
" sysrq <param> Execute sysrq with <param>\n");
|
|
#endif
|
|
|
|
#ifdef CONFIG_KGDB
|
|
fiq_debugger_printf(&state->output,
|
|
" kgdb Enter kernel debugger\n");
|
|
#endif
|
|
}
|
|
|
|
#ifndef CONFIG_FIQ_DEBUGGER_MODULE
|
|
static void fiq_debugger_take_affinity(struct fiq_debugger_state *state, int cpu)
|
|
{
|
|
struct cpumask cpumask;
|
|
|
|
cpumask_clear(&cpumask);
|
|
cpumask_set_cpu(cpu, &cpumask);
|
|
irq_set_affinity(state->uart_irq, &cpumask);
|
|
}
|
|
#else
|
|
static void fiq_debugger_take_affinity(struct fiq_debugger_state *state, int cpu)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static void fiq_debugger_switch_cpu(struct fiq_debugger_state *state, int cpu)
|
|
{
|
|
if (!cpu_online(cpu)) {
|
|
fiq_debugger_printf(&state->output, "cpu %d offline\n", cpu);
|
|
return;
|
|
}
|
|
|
|
if (!fiq_debugger_have_fiq(state)) {
|
|
fiq_debugger_take_affinity(state, cpu);
|
|
}
|
|
#ifdef CONFIG_ARCH_ROCKCHIP
|
|
else {
|
|
#ifdef CONFIG_FIQ_DEBUGGER_TRUST_ZONE
|
|
if (sip_fiq_debugger_is_enabled() ||
|
|
sdei_fiq_debugger_is_enabled()) {
|
|
if (state->pdata->switch_cpu) {
|
|
state->pdata->switch_cpu(state->pdev, cpu);
|
|
state->current_cpu = cpu;
|
|
}
|
|
return;
|
|
}
|
|
#else
|
|
struct cpumask cpumask;
|
|
|
|
cpumask_clear(&cpumask);
|
|
cpumask_set_cpu(cpu, &cpumask);
|
|
#ifndef CONFIG_FIQ_DEBUGGER_MODULE
|
|
irq_set_affinity(state->fiq, &cpumask);
|
|
irq_set_affinity(state->uart_irq, &cpumask);
|
|
#endif
|
|
#endif
|
|
}
|
|
#endif
|
|
state->current_cpu = cpu;
|
|
}
|
|
|
|
static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
|
|
const char *cmd, const struct pt_regs *regs,
|
|
void *svc_sp)
|
|
{
|
|
bool signal_helper = false;
|
|
|
|
if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
|
|
fiq_debugger_help(state);
|
|
} else if (!strcmp(cmd, "pc")) {
|
|
fiq_debugger_dump_pc(&state->output, regs);
|
|
} else if (!strcmp(cmd, "regs")) {
|
|
fiq_debugger_dump_regs(&state->output, regs);
|
|
} else if (!strcmp(cmd, "allregs")) {
|
|
fiq_debugger_dump_allregs(&state->output, regs);
|
|
#ifndef CONFIG_FIQ_DEBUGGER_MODULE
|
|
} else if (!strcmp(cmd, "bt")) {
|
|
/*
|
|
* ARM64:
|
|
* Cpu is at ELx(1 or 2), but EL0_SP(svc_sp) may be user space.
|
|
* If EL0_SP.63 is 0, use TTBR0.
|
|
*/
|
|
if (user_mode((struct pt_regs *)regs) ||
|
|
(IS_ENABLED(CONFIG_ARM64) && (((unsigned long)svc_sp & 0x8000000000000000) == 0)) ||
|
|
(IS_ENABLED(CONFIG_ARM) && (((unsigned long)svc_sp < PAGE_OFFSET) || ((unsigned long)svc_sp > -256UL))))
|
|
fiq_debugger_printf(&state->output, "User mode\n");
|
|
else
|
|
fiq_debugger_dump_stacktrace(&state->output, 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")) {
|
|
fiq_debugger_dump_irqs(state);
|
|
} else if (!strcmp(cmd, "kmsg")) {
|
|
fiq_debugger_dump_kernel_log(state);
|
|
#endif
|
|
#ifdef CONFIG_ROCKCHIP_DEBUG
|
|
} else if (!strcmp(cmd, "pcsr")) {
|
|
rockchip_debug_dump_pcsr(&state->output);
|
|
#endif
|
|
#ifndef CONFIG_FIQ_DEBUGGER_MODULE
|
|
} else if (!strcmp(cmd, "version")) {
|
|
fiq_debugger_printf(&state->output, "%s\n", linux_banner);
|
|
#endif
|
|
} else if (!strcmp(cmd, "sleep")) {
|
|
state->no_sleep = false;
|
|
fiq_debugger_printf(&state->output, "enabling sleep\n");
|
|
} else if (!strcmp(cmd, "nosleep")) {
|
|
state->no_sleep = true;
|
|
fiq_debugger_printf(&state->output, "disabling sleep\n");
|
|
} else if (!strcmp(cmd, "console")) {
|
|
fiq_debugger_printf(&state->output, "console mode\n");
|
|
fiq_debugger_uart_flush(state);
|
|
state->console_enable = true;
|
|
#ifdef CONFIG_FIQ_DEBUGGER_TRUST_ZONE
|
|
if (sip_fiq_debugger_is_enabled()) {
|
|
if (state->pdata->enable_debug)
|
|
state->pdata->enable_debug(state->pdev, false);
|
|
}
|
|
#endif
|
|
} else if (!strcmp(cmd, "cpu")) {
|
|
fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
|
|
} else if (!strncmp(cmd, "cpu ", 4)) {
|
|
unsigned long cpu = 0;
|
|
if (kstrtoul(cmd + 4, 10, &cpu) == 0)
|
|
fiq_debugger_switch_cpu(state, cpu);
|
|
else
|
|
fiq_debugger_printf(&state->output, "invalid cpu\n");
|
|
|
|
fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
|
|
} else {
|
|
if (state->debug_busy) {
|
|
fiq_debugger_printf(&state->output,
|
|
"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)
|
|
fiq_debugger_prompt(state);
|
|
|
|
return signal_helper;
|
|
}
|
|
|
|
static void fiq_debugger_sleep_timer_expired(struct timer_list *t)
|
|
{
|
|
struct fiq_debugger_state *state = from_timer(state, t, sleep_timer);
|
|
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;
|
|
fiq_debugger_printf_nfiq(state,
|
|
"suspending fiq debugger\n");
|
|
}
|
|
state->ignore_next_wakeup_irq = true;
|
|
fiq_debugger_uart_disable(state);
|
|
state->uart_enabled = false;
|
|
fiq_debugger_enable_wakeup_irq(state);
|
|
}
|
|
__pm_relax(&state->debugger_wake_src);
|
|
spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
|
|
}
|
|
|
|
static void fiq_debugger_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) {
|
|
__pm_stay_awake(&state->debugger_wake_src);
|
|
fiq_debugger_uart_enable(state);
|
|
state->uart_enabled = true;
|
|
fiq_debugger_disable_wakeup_irq(state);
|
|
mod_timer(&state->sleep_timer, jiffies + HZ / 2);
|
|
}
|
|
spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
|
|
}
|
|
|
|
static irqreturn_t fiq_debugger_wakeup_irq_handler(int irq, void *dev)
|
|
{
|
|
struct fiq_debugger_state *state = dev;
|
|
|
|
if (!state->no_sleep)
|
|
fiq_debugger_puts(state, "WAKEUP\n");
|
|
fiq_debugger_handle_wakeup(state);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static
|
|
void fiq_debugger_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 fiq_debugger_handle_irq_context(struct fiq_debugger_state *state)
|
|
{
|
|
if (!state->no_sleep) {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&state->sleep_timer_lock, flags);
|
|
__pm_stay_awake(&state->debugger_wake_src);
|
|
mod_timer(&state->sleep_timer, jiffies + HZ * 5);
|
|
spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
|
|
}
|
|
fiq_debugger_handle_console_irq_context(state);
|
|
if (state->debug_busy) {
|
|
fiq_debugger_irq_exec(state, state->debug_cmd);
|
|
if (!state->console_enable)
|
|
fiq_debugger_prompt(state);
|
|
state->debug_busy = 0;
|
|
}
|
|
}
|
|
|
|
static int fiq_debugger_getc(struct fiq_debugger_state *state)
|
|
{
|
|
if (state->pdata->uart_getc)
|
|
return state->pdata->uart_getc(state->pdev);
|
|
else
|
|
return FIQ_DEBUGGER_NO_CHAR;
|
|
}
|
|
|
|
static int fiq_debugger_cmd_check_back(struct fiq_debugger_state *state, char c)
|
|
{
|
|
char *s;
|
|
int i = 0;
|
|
|
|
if (c == 'A') {
|
|
state->back_pointer = (state->back_pointer - 1) & CMD_COUNT;
|
|
if (state->back_pointer != state->current_pointer) {
|
|
s = state->cmd_buf[state->back_pointer];
|
|
if (*s != 0) {
|
|
for (i = 0; i < strlen(state->debug_buf) - 1; i++) {
|
|
fiq_debugger_putc(state, 8);
|
|
fiq_debugger_putc(state, ' ');
|
|
fiq_debugger_putc(state, 8);
|
|
}
|
|
memset(state->debug_buf, 0, DEBUG_MAX);
|
|
strcpy(state->debug_buf, s);
|
|
state->debug_count = strlen(state->debug_buf);
|
|
fiq_debugger_printf(&state->output, state->debug_buf);
|
|
} else {
|
|
state->back_pointer = (state->back_pointer + 1) & CMD_COUNT;
|
|
}
|
|
|
|
} else {
|
|
state->back_pointer = (state->back_pointer + 1) & CMD_COUNT;
|
|
}
|
|
} else if (c == 'B') {
|
|
if (state->back_pointer != state->current_pointer) {
|
|
state->back_pointer = (state->back_pointer + 1) & CMD_COUNT;
|
|
if (state->back_pointer == state->current_pointer) {
|
|
goto cmd_clear;
|
|
} else {
|
|
s = state->cmd_buf[state->back_pointer];
|
|
if (*s != 0) {
|
|
for (i = 0; i < strlen(state->debug_buf) - 1; i++) {
|
|
fiq_debugger_putc(state, 8);
|
|
fiq_debugger_putc(state, ' ');
|
|
fiq_debugger_putc(state, 8);
|
|
}
|
|
memset(state->debug_buf, 0, DEBUG_MAX);
|
|
strcpy(state->debug_buf, s);
|
|
state->debug_count = strlen(state->debug_buf);
|
|
fiq_debugger_printf(&state->output, state->debug_buf);
|
|
}
|
|
}
|
|
} else {
|
|
cmd_clear:
|
|
for (i = 0; i < strlen(state->debug_buf) - 1; i++) {
|
|
fiq_debugger_putc(state, 8);
|
|
fiq_debugger_putc(state, ' ');
|
|
fiq_debugger_putc(state, 8);
|
|
}
|
|
memset(state->debug_buf, 0, DEBUG_MAX);
|
|
state->debug_count = 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void fiq_debugger_cmd_tab(struct fiq_debugger_state *state)
|
|
{
|
|
int i, j;
|
|
int count = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(cmd_buf); i++)
|
|
cmd_buf[i][15] = 1;
|
|
|
|
for (j = 1; j <= strlen(state->debug_buf); j++) {
|
|
count = 0;
|
|
for (i = 0; i < ARRAY_SIZE(cmd_buf); i++) {
|
|
if (cmd_buf[i][15] == 1) {
|
|
if (strncmp(state->debug_buf, cmd_buf[i], j))
|
|
cmd_buf[i][15] = 0;
|
|
else
|
|
count++;
|
|
}
|
|
}
|
|
if (count == 0)
|
|
break;
|
|
}
|
|
|
|
if (count == 1) {
|
|
for (i = 0; i < ARRAY_SIZE(cmd_buf); i++) {
|
|
if (cmd_buf[i][15] == 1)
|
|
break;
|
|
}
|
|
|
|
for (j = 0; j < strlen(state->debug_buf); j++) {
|
|
fiq_debugger_putc(state, 8);
|
|
fiq_debugger_putc(state, ' ');
|
|
fiq_debugger_putc(state, 8);
|
|
}
|
|
memset(state->debug_buf, 0, DEBUG_MAX);
|
|
strcpy(state->debug_buf, cmd_buf[i]);
|
|
state->debug_count = strlen(state->debug_buf);
|
|
fiq_debugger_printf(&state->output, state->debug_buf);
|
|
}
|
|
}
|
|
|
|
static bool fiq_debugger_handle_uart_interrupt(struct fiq_debugger_state *state,
|
|
int this_cpu, const struct pt_regs *regs, void *svc_sp)
|
|
{
|
|
int c;
|
|
static int last_c;
|
|
int count = 0;
|
|
bool signal_helper = false;
|
|
|
|
if (state->current_cpu == -1)
|
|
state->current_cpu = this_cpu;
|
|
|
|
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;
|
|
|
|
fiq_debugger_printf(&state->output,
|
|
"fiq_debugger: cpu %d not responding, "
|
|
"reverting to cpu %d\n", state->current_cpu,
|
|
this_cpu);
|
|
|
|
atomic_set(&state->unhandled_fiq_count, 0);
|
|
state->current_cpu = this_cpu;
|
|
return false;
|
|
}
|
|
|
|
state->in_fiq = true;
|
|
|
|
while ((c = fiq_debugger_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
|
|
count++;
|
|
if (!state->debug_enable) {
|
|
if ((c == 13) || (c == 10)) {
|
|
state->debug_enable = true;
|
|
state->debug_count = 0;
|
|
fiq_debugger_prompt(state);
|
|
}
|
|
} else if (c == FIQ_DEBUGGER_BREAK) {
|
|
state->console_enable = false;
|
|
#ifdef CONFIG_ARCH_ROCKCHIP
|
|
fiq_debugger_puts(state, "\nWelcome to ");
|
|
#endif
|
|
if (fiq_debugger_have_fiq(state))
|
|
fiq_debugger_puts(state,
|
|
"fiq debugger mode\n");
|
|
else
|
|
fiq_debugger_puts(state,
|
|
"irq debugger mode\n");
|
|
state->debug_count = 0;
|
|
#ifdef CONFIG_ARCH_ROCKCHIP
|
|
fiq_debugger_puts(state, "Enter ? to get command help\n");
|
|
state->back_pointer = CMD_COUNT;
|
|
state->current_pointer = CMD_COUNT;
|
|
memset(state->cmd_buf, 0, (CMD_COUNT + 1) * DEBUG_MAX);
|
|
#endif
|
|
|
|
#ifdef CONFIG_FIQ_DEBUGGER_TRUST_ZONE
|
|
if (sip_fiq_debugger_is_enabled()) {
|
|
if (state->pdata->enable_debug)
|
|
state->pdata->enable_debug(state->pdev,
|
|
true);
|
|
}
|
|
#endif
|
|
fiq_debugger_prompt(state);
|
|
#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
|
|
fiq_debugger_ringbuf_push(state->tty_rbuf, 8);
|
|
fiq_debugger_ringbuf_push(state->tty_rbuf, 8);
|
|
#endif
|
|
#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
|
|
#ifdef CONFIG_ARCH_ROCKCHIP
|
|
} else if (last_c == '[' && (c == 'A' || c == 'B' || c == 'C' || c == 'D')) {
|
|
if (state->debug_count > 0) {
|
|
state->debug_count--;
|
|
fiq_debugger_putc(state, 8);
|
|
fiq_debugger_putc(state, ' ');
|
|
fiq_debugger_putc(state, 8);
|
|
}
|
|
fiq_debugger_cmd_check_back(state, c);
|
|
} else if (c == 9) {
|
|
fiq_debugger_cmd_tab(state);
|
|
#endif
|
|
} else if ((c >= ' ') && (c < 127)) {
|
|
if (state->debug_count < (DEBUG_MAX - 1)) {
|
|
state->debug_buf[state->debug_count++] = c;
|
|
fiq_debugger_putc(state, c);
|
|
}
|
|
} else if ((c == 8) || (c == 127)) {
|
|
if (state->debug_count > 0) {
|
|
state->debug_count--;
|
|
fiq_debugger_putc(state, 8);
|
|
fiq_debugger_putc(state, ' ');
|
|
fiq_debugger_putc(state, 8);
|
|
}
|
|
} else if ((c == 13) || (c == 10)) {
|
|
if (c == '\r' || (c == '\n' && last_c != '\r')) {
|
|
fiq_debugger_putc(state, '\r');
|
|
fiq_debugger_putc(state, '\n');
|
|
}
|
|
if (state->debug_count) {
|
|
state->debug_buf[state->debug_count] = 0;
|
|
state->debug_count = 0;
|
|
signal_helper |=
|
|
fiq_debugger_fiq_exec(state,
|
|
state->debug_buf,
|
|
regs, svc_sp);
|
|
#ifdef CONFIG_ARCH_ROCKCHIP
|
|
if (signal_helper == false) {
|
|
state->current_pointer =
|
|
(state->current_pointer - 1) & CMD_COUNT;
|
|
if (strcmp(state->cmd_buf[state->current_pointer], state->debug_buf)) {
|
|
state->current_pointer =
|
|
(state->current_pointer + 1) & CMD_COUNT;
|
|
memset(state->cmd_buf[state->current_pointer], 0, DEBUG_MAX);
|
|
strcpy(state->cmd_buf[state->current_pointer], state->debug_buf);
|
|
}
|
|
memset(state->debug_buf, 0, DEBUG_MAX);
|
|
state->current_pointer =
|
|
(state->current_pointer + 1) & CMD_COUNT;
|
|
state->back_pointer =
|
|
state->current_pointer;
|
|
}
|
|
#endif
|
|
} else {
|
|
fiq_debugger_prompt(state);
|
|
}
|
|
}
|
|
last_c = c;
|
|
}
|
|
if (!state->console_enable)
|
|
fiq_debugger_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;
|
|
}
|
|
|
|
#ifdef CONFIG_FIQ_GLUE
|
|
static void fiq_debugger_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 = fiq_debugger_handle_uart_interrupt(state, this_cpu, regs,
|
|
svc_sp);
|
|
if (need_irq)
|
|
fiq_debugger_force_irq(state);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_FIQ_DEBUGGER_TRUST_ZONE
|
|
void fiq_debugger_fiq(void *regs, u32 cpu)
|
|
{
|
|
struct fiq_debugger_state *state = g_state;
|
|
bool need_irq;
|
|
|
|
if (!state)
|
|
return;
|
|
|
|
need_irq = fiq_debugger_handle_uart_interrupt(state, cpu, regs,
|
|
current_thread_info());
|
|
if (need_irq)
|
|
fiq_debugger_force_irq(state);
|
|
}
|
|
EXPORT_SYMBOL(fiq_debugger_fiq);
|
|
#endif
|
|
|
|
/*
|
|
* 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 fiq_debugger_uart_irq(int irq, void *dev)
|
|
{
|
|
struct fiq_debugger_state *state = dev;
|
|
bool not_done;
|
|
|
|
fiq_debugger_handle_wakeup(state);
|
|
|
|
/* handle the debugger irq in regular context */
|
|
not_done = fiq_debugger_handle_uart_interrupt(state, smp_processor_id(),
|
|
#ifdef CONFIG_NO_GKI
|
|
get_irq_regs(),
|
|
#else
|
|
NULL,
|
|
#endif
|
|
current_thread_info());
|
|
if (not_done)
|
|
fiq_debugger_force_irq(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 fiq_debugger_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);
|
|
|
|
fiq_debugger_handle_irq_context(state);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
#ifdef CONFIG_FIQ_GLUE
|
|
static void fiq_debugger_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);
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
|
|
static struct tty_driver *fiq_debugger_console_device(struct console *co, int *index)
|
|
{
|
|
*index = co->index;
|
|
return fiq_tty_driver;
|
|
}
|
|
|
|
static void fiq_debugger_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;
|
|
|
|
#ifdef CONFIG_RK_CONSOLE_THREAD
|
|
if (state->pdata->console_write) {
|
|
state->pdata->console_write(state->pdev, s, count);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
fiq_debugger_uart_enable(state);
|
|
spin_lock_irqsave(&state->console_lock, flags);
|
|
while (count--) {
|
|
if (*s == '\n')
|
|
fiq_debugger_putc(state, '\r');
|
|
fiq_debugger_putc(state, *s++);
|
|
}
|
|
fiq_debugger_uart_flush(state);
|
|
spin_unlock_irqrestore(&state->console_lock, flags);
|
|
fiq_debugger_uart_disable(state);
|
|
}
|
|
|
|
static struct console fiq_debugger_console = {
|
|
.name = "ttyFIQ",
|
|
.device = fiq_debugger_console_device,
|
|
.write = fiq_debugger_console_write,
|
|
.flags = CON_PRINTBUFFER | CON_ANYTIME | CON_ENABLED,
|
|
};
|
|
|
|
static 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);
|
|
}
|
|
|
|
static void fiq_tty_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
tty_port_close(tty->port, tty, filp);
|
|
}
|
|
|
|
void fiq_tty_wake_up(struct platform_device *pdev)
|
|
{
|
|
struct fiq_debugger_state *state = platform_get_drvdata(pdev);
|
|
|
|
if (tty_port_initialized(&state->tty_port))
|
|
tty_port_tty_wakeup(&state->tty_port);
|
|
}
|
|
EXPORT_SYMBOL_GPL(fiq_tty_wake_up);
|
|
|
|
static 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;
|
|
|
|
#ifdef CONFIG_RK_CONSOLE_THREAD
|
|
if (state->pdata->tty_write)
|
|
return state->pdata->tty_write(state->pdev, buf, count);
|
|
#endif
|
|
|
|
fiq_debugger_uart_enable(state);
|
|
#ifndef CONFIG_RK_CONSOLE_THREAD
|
|
spin_lock_irq(&state->console_lock);
|
|
#endif
|
|
for (i = 0; i < count; i++)
|
|
fiq_debugger_putc(state, *buf++);
|
|
#ifndef CONFIG_RK_CONSOLE_THREAD
|
|
spin_unlock_irq(&state->console_lock);
|
|
#endif
|
|
fiq_debugger_uart_disable(state);
|
|
|
|
return count;
|
|
}
|
|
|
|
static unsigned int fiq_tty_write_room(struct tty_struct *tty)
|
|
{
|
|
#ifdef CONFIG_RK_CONSOLE_THREAD
|
|
int line = tty->index;
|
|
struct fiq_debugger_state **states = tty->driver->driver_state;
|
|
struct fiq_debugger_state *state = states[line];
|
|
|
|
if (state->pdata->write_room)
|
|
return state->pdata->write_room(state->pdev);
|
|
#endif
|
|
return 2048;
|
|
}
|
|
|
|
#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;
|
|
|
|
fiq_debugger_uart_enable(state);
|
|
if (fiq_debugger_have_fiq(state)) {
|
|
#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
|
|
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);
|
|
}
|
|
#endif
|
|
} else {
|
|
c = fiq_debugger_getc(state);
|
|
if (c == FIQ_DEBUGGER_NO_CHAR)
|
|
c = NO_POLL_CHAR;
|
|
}
|
|
fiq_debugger_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];
|
|
fiq_debugger_uart_enable(state);
|
|
fiq_debugger_putc(state, ch);
|
|
fiq_debugger_uart_disable(state);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static int fiq_tty_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
struct tty_driver *driver = m->private;
|
|
struct fiq_debugger_state **states = driver->driver_state;
|
|
struct fiq_debugger_state *state;
|
|
int i;
|
|
|
|
seq_puts(m, "fiq-debugger driver\n");
|
|
for (i = 0; i < MAX_FIQ_DEBUGGER_PORTS; i++) {
|
|
state = states[i];
|
|
if (!state)
|
|
continue;
|
|
|
|
seq_printf(m, "%d:", i);
|
|
seq_printf(m, " state:%d", state->console_enable);
|
|
seq_putc(m, '\n');
|
|
}
|
|
return 0;
|
|
}
|
|
#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
|
|
#ifdef CONFIG_PROC_FS
|
|
.proc_show = fiq_tty_proc_show,
|
|
#endif
|
|
};
|
|
|
|
static int fiq_debugger_tty_init(void)
|
|
{
|
|
int ret;
|
|
struct fiq_debugger_state **states = NULL;
|
|
struct tty_driver *drv;
|
|
|
|
states = kzalloc(sizeof(*states) * MAX_FIQ_DEBUGGER_PORTS, GFP_KERNEL);
|
|
if (!states) {
|
|
pr_err("Failed to allocate fiq debugger state structres\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
drv = tty_alloc_driver(MAX_FIQ_DEBUGGER_PORTS, TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV);
|
|
if (IS_ERR(drv)) {
|
|
pr_err("Failed to allocate fiq debugger tty\n");
|
|
ret = -ENOMEM;
|
|
goto err_free_state;
|
|
}
|
|
fiq_tty_driver = drv;
|
|
|
|
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->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:
|
|
tty_driver_kref_put(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_cpu_offine_migrate_irq(unsigned int cpu)
|
|
{
|
|
if (g_state && cpu == g_state->current_cpu) {
|
|
unsigned int new_cpu = cpumask_any_but(cpu_online_mask, cpu);
|
|
|
|
if (new_cpu < nr_cpu_ids)
|
|
g_state->current_cpu = new_cpu;
|
|
}
|
|
|
|
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;
|
|
enum cpuhp_state cs = -1;
|
|
|
|
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");
|
|
|
|
#ifndef CONFIG_ARCH_ROCKCHIP
|
|
/* 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;
|
|
#endif
|
|
state = kzalloc(sizeof(*state), GFP_KERNEL);
|
|
state->output.printf = fiq_debugger_printf;
|
|
timer_setup(&state->sleep_timer, fiq_debugger_sleep_timer_expired, 0);
|
|
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->current_cpu = -1;
|
|
|
|
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, fiq_debugger_work);
|
|
spin_lock_init(&state->work_lock);
|
|
|
|
platform_set_drvdata(pdev, state);
|
|
|
|
spin_lock_init(&state->sleep_timer_lock);
|
|
|
|
if (state->wakeup_irq < 0 && fiq_debugger_have_fiq(state))
|
|
state->no_sleep = true;
|
|
state->ignore_next_wakeup_irq = !state->no_sleep;
|
|
|
|
state->debugger_wake_src.name = "serial-debug";
|
|
wakeup_source_add(&state->debugger_wake_src);
|
|
|
|
#ifdef CONFIG_ARCH_ROCKCHIP
|
|
if (uart_irq < 0 && fiq < 0)
|
|
goto console_out;
|
|
#endif
|
|
|
|
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 (fiq_debugger_have_fiq(state)) {
|
|
#ifdef CONFIG_FIQ_GLUE
|
|
#ifdef CONFIG_FIQ_DEBUGGER_TRUST_ZONE
|
|
if (sip_fiq_debugger_is_enabled() ||
|
|
sdei_fiq_debugger_is_enabled()) {
|
|
} else
|
|
#endif
|
|
{
|
|
state->handler.fiq = fiq_debugger_fiq;
|
|
state->handler.resume = fiq_debugger_resume;
|
|
ret = fiq_glue_register_handler(&state->handler);
|
|
if (ret) {
|
|
pr_err("%s: could not install fiq handler\n", __func__);
|
|
goto err_register_irq;
|
|
}
|
|
#ifdef CONFIG_ARCH_ROCKCHIP
|
|
/* set state->fiq to secure state, so fiq is available */
|
|
gic_set_irq_secure(irq_get_irq_data(state->fiq));
|
|
/*
|
|
* set state->fiq priority a little higher than other
|
|
* interrupts (normal is 0xa0)
|
|
*/
|
|
gic_set_irq_priority(irq_get_irq_data(state->fiq), 0x90);
|
|
#endif
|
|
pdata->fiq_enable(pdev, state->fiq, 1);
|
|
}
|
|
#endif
|
|
} else {
|
|
irq_set_status_flags(state->uart_irq, IRQ_NOAUTOEN);
|
|
|
|
if (IS_ENABLED(CONFIG_NO_GKI))
|
|
ret = request_nmi(state->uart_irq, fiq_debugger_uart_irq,
|
|
IRQF_PERCPU, "debug", state);
|
|
else
|
|
ret = -EINVAL;
|
|
if (ret) {
|
|
pr_err("%s: could not install nmi irq handler\n", __func__);
|
|
irq_clear_status_flags(state->uart_irq, IRQ_NOAUTOEN);
|
|
ret = request_irq(state->uart_irq, fiq_debugger_uart_irq,
|
|
IRQF_NO_SUSPEND | IRQF_NOBALANCING, "debug", state);
|
|
} else {
|
|
enable_nmi(state->uart_irq);
|
|
}
|
|
|
|
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);
|
|
|
|
ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
|
|
"soc/fiq_debugger",
|
|
NULL,
|
|
fiq_debugger_cpu_offine_migrate_irq);
|
|
if (ret < 0)
|
|
pr_err("%s: could not setup cpu offine handler\n", __func__);
|
|
else
|
|
cs = ret;
|
|
}
|
|
|
|
if (state->signal_irq >= 0) {
|
|
ret = request_irq(state->signal_irq, fiq_debugger_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,
|
|
fiq_debugger_wakeup_irq_handler,
|
|
IRQF_TRIGGER_FALLING,
|
|
"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)
|
|
fiq_debugger_handle_wakeup(state);
|
|
|
|
if (pdata->uart_init) {
|
|
ret = pdata->uart_init(pdev);
|
|
if (ret)
|
|
goto err_uart_init;
|
|
}
|
|
|
|
if (state->clk)
|
|
clk_disable(state->clk);
|
|
#ifdef CONFIG_ARCH_ROCKCHIP
|
|
console_out:
|
|
#endif
|
|
#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
|
|
spin_lock_init(&state->console_lock);
|
|
state->console = fiq_debugger_console;
|
|
state->console.index = pdev->id;
|
|
#ifndef CONFIG_FIQ_DEBUGGER_MODULE
|
|
if (!console_set_on_cmdline)
|
|
add_preferred_console(state->console.name,
|
|
state->console.index, NULL);
|
|
#endif
|
|
register_console(&state->console);
|
|
fiq_debugger_tty_init_one(state);
|
|
#endif
|
|
|
|
/* switch to cpu0 default */
|
|
fiq_debugger_switch_cpu(state, 0);
|
|
g_state = state;
|
|
return 0;
|
|
|
|
err_register_irq:
|
|
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);
|
|
if (cs >= 0)
|
|
cpuhp_remove_state_nocalls(cs);
|
|
wakeup_source_remove(&state->debugger_wake_src);
|
|
__pm_relax(&state->debugger_wake_src);
|
|
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,
|
|
},
|
|
};
|
|
|
|
#if defined(CONFIG_FIQ_DEBUGGER_UART_OVERLAY)
|
|
int fiq_debugger_uart_overlay(void)
|
|
{
|
|
struct device_node *onp = of_find_node_by_path("/uart_overlay@0");
|
|
int ret;
|
|
|
|
if (!onp) {
|
|
pr_err("serial_debugger: uart overlay not found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = of_overlay_create(onp);
|
|
if (ret < 0) {
|
|
pr_err("serial_debugger: fail to create overlay: %d\n", ret);
|
|
of_node_put(onp);
|
|
return ret;
|
|
}
|
|
|
|
pr_info("serial_debugger: uart overlay applied\n");
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int __init fiq_debugger_init(void)
|
|
{
|
|
if (fiq_debugger_disable) {
|
|
pr_err("serial_debugger: disabled\n");
|
|
return -ENODEV;
|
|
}
|
|
#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
|
|
fiq_debugger_tty_init();
|
|
#endif
|
|
#if defined(CONFIG_FIQ_DEBUGGER_UART_OVERLAY)
|
|
fiq_debugger_uart_overlay();
|
|
#endif
|
|
return platform_driver_register(&fiq_debugger_driver);
|
|
}
|
|
|
|
postcore_initcall(fiq_debugger_init);
|
|
|
|
static void __exit fiq_debugger_exit(void)
|
|
{
|
|
platform_driver_unregister(&fiq_debugger_driver);
|
|
}
|
|
module_exit(fiq_debugger_exit);
|
|
|
|
MODULE_DESCRIPTION("FIQ Debugger");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:fiq-debugger");
|