pm.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 697 行 · 第 1/2 页

		MPUI1510_RESTORE(MPUI_CTRL);
		MPUI1510_RESTORE(MPUI_DSP_BOOT_CONFIG);
		MPUI1510_RESTORE(MPUI_DSP_API_CONFIG);
		MPUI1510_RESTORE(EMIFS_CONFIG);
		MPUI1510_RESTORE(EMIFF_SDRAM_CONFIG);
		MPUI1510_RESTORE(OMAP_IH1_MIR);
		MPUI1510_RESTORE(OMAP_IH2_MIR);
	} else if (cpu_is_omap16xx()) {
		MPUI1610_RESTORE(MPUI_CTRL);
		MPUI1610_RESTORE(MPUI_DSP_BOOT_CONFIG);
		MPUI1610_RESTORE(MPUI_DSP_API_CONFIG);
		MPUI1610_RESTORE(EMIFS_CONFIG);
		MPUI1610_RESTORE(EMIFF_SDRAM_CONFIG);

		MPUI1610_RESTORE(OMAP_IH1_MIR);
		MPUI1610_RESTORE(OMAP_IH2_0_MIR);
		MPUI1610_RESTORE(OMAP_IH2_1_MIR);
		MPUI1610_RESTORE(OMAP_IH2_2_MIR);
		MPUI1610_RESTORE(OMAP_IH2_3_MIR);
	}

	/*
	 * Reenable interrupts
	 */

	sti();
	stf();

	printk("PM: OMAP%x is re-starting from deep sleep...\n", system_rev);

	if (machine_is_omap_osk()) {
		/* Let LED1 (D9) blink again */
		tps65010_set_led(LED1, BLINK);
	}
}

#ifdef CONFIG_PROC_FS
static int g_read_completed;
/*
 * Writing to /proc/pm puts the CPU in sleep mode
 */
static ssize_t
omap_pm_write_proc(struct file * file, const char * buf, size_t count,
    loff_t *ppos)
{
	int rc;
	rc = pm_send_all(PM_SUSPEND, (void *)3);

	if (rc == 0) {
		omap_pm_suspend();

		pm_send_all(PM_RESUME, (void *)0);
	}
	return count;
}


static int omap_pm_read_proc(
	char *page_buffer,
	char **my_first_byte,
	off_t virtual_start,
	int length,
	int *eof,
	void *data)
{
	int my_buffer_offset = 0;
	char * const my_base = page_buffer;

	ARM_SAVE(ARM_CKCTL);
	ARM_SAVE(ARM_IDLECT1);
	ARM_SAVE(ARM_IDLECT2);
	ARM_SAVE(ARM_EWUPCT);
	ARM_SAVE(ARM_RSTCT1);
	ARM_SAVE(ARM_RSTCT2);
	ARM_SAVE(ARM_SYSST);

	ULPD_SAVE(ULPD_IT_STATUS);
	ULPD_SAVE(ULPD_CLOCK_CTRL);
	ULPD_SAVE(ULPD_SOFT_REQ);
	ULPD_SAVE(ULPD_STATUS_REQ);
	ULPD_SAVE(ULPD_DPLL_CTRL);
	ULPD_SAVE(ULPD_POWER_CTRL);

	if (cpu_is_omap1510()) {
		MPUI1510_SAVE(MPUI_CTRL);
		MPUI1510_SAVE(MPUI_DSP_STATUS);
		MPUI1510_SAVE(MPUI_DSP_BOOT_CONFIG);
		MPUI1510_SAVE(MPUI_DSP_API_CONFIG);
		MPUI1510_SAVE(EMIFF_SDRAM_CONFIG);
		MPUI1510_SAVE(EMIFS_CONFIG);
	} else if (cpu_is_omap16xx()) {
		MPUI1610_SAVE(MPUI_CTRL);
		MPUI1610_SAVE(MPUI_DSP_STATUS);
		MPUI1610_SAVE(MPUI_DSP_BOOT_CONFIG);
		MPUI1610_SAVE(MPUI_DSP_API_CONFIG);
		MPUI1610_SAVE(EMIFF_SDRAM_CONFIG);
		MPUI1610_SAVE(EMIFS_CONFIG);
	}

	if (virtual_start == 0) {
		g_read_completed = 0;

		my_buffer_offset += sprintf(my_base + my_buffer_offset,
		   "ARM_CKCTL_REG:            0x%-8x     \n"
		   "ARM_IDLECT1_REG:          0x%-8x     \n"
		   "ARM_IDLECT2_REG:          0x%-8x     \n"
		   "ARM_EWUPCT_REG:           0x%-8x     \n"
		   "ARM_RSTCT1_REG:           0x%-8x     \n"
		   "ARM_RSTCT2_REG:           0x%-8x     \n"
		   "ARM_SYSST_REG:            0x%-8x     \n"
		   "ULPD_IT_STATUS_REG:       0x%-4x     \n"
		   "ULPD_CLOCK_CTRL_REG:      0x%-4x     \n"
		   "ULPD_SOFT_REQ_REG:        0x%-4x     \n"
		   "ULPD_DPLL_CTRL_REG:       0x%-4x     \n"
		   "ULPD_STATUS_REQ_REG:      0x%-4x     \n"
		   "ULPD_POWER_CTRL_REG:      0x%-4x     \n",
		   ARM_SHOW(ARM_CKCTL),
		   ARM_SHOW(ARM_IDLECT1),
		   ARM_SHOW(ARM_IDLECT2),
		   ARM_SHOW(ARM_EWUPCT),
		   ARM_SHOW(ARM_RSTCT1),
		   ARM_SHOW(ARM_RSTCT2),
		   ARM_SHOW(ARM_SYSST),
		   ULPD_SHOW(ULPD_IT_STATUS),
		   ULPD_SHOW(ULPD_CLOCK_CTRL),
		   ULPD_SHOW(ULPD_SOFT_REQ),
		   ULPD_SHOW(ULPD_DPLL_CTRL),
		   ULPD_SHOW(ULPD_STATUS_REQ),
		   ULPD_SHOW(ULPD_POWER_CTRL));

		if (cpu_is_omap1510()) {
			my_buffer_offset += sprintf(my_base + my_buffer_offset,
			   "MPUI1510_CTRL_REG             0x%-8x \n"
			   "MPUI1510_DSP_STATUS_REG:      0x%-8x \n"
			   "MPUI1510_DSP_BOOT_CONFIG_REG: 0x%-8x \n"
		   	   "MPUI1510_DSP_API_CONFIG_REG:  0x%-8x \n"
		   	   "MPUI1510_SDRAM_CONFIG_REG:    0x%-8x \n"
		   	   "MPUI1510_EMIFS_CONFIG_REG:    0x%-8x \n",
		   	   MPUI1510_SHOW(MPUI_CTRL),
		   	   MPUI1510_SHOW(MPUI_DSP_STATUS),
		   	   MPUI1510_SHOW(MPUI_DSP_BOOT_CONFIG),
		   	   MPUI1510_SHOW(MPUI_DSP_API_CONFIG),
		   	   MPUI1510_SHOW(EMIFF_SDRAM_CONFIG),
		   	   MPUI1510_SHOW(EMIFS_CONFIG));
		} else if (cpu_is_omap16xx()) {
			my_buffer_offset += sprintf(my_base + my_buffer_offset,
			   "MPUI1610_CTRL_REG             0x%-8x \n"
			   "MPUI1610_DSP_STATUS_REG:      0x%-8x \n"
			   "MPUI1610_DSP_BOOT_CONFIG_REG: 0x%-8x \n"
		   	   "MPUI1610_DSP_API_CONFIG_REG:  0x%-8x \n"
		   	   "MPUI1610_SDRAM_CONFIG_REG:    0x%-8x \n"
		   	   "MPUI1610_EMIFS_CONFIG_REG:    0x%-8x \n",
		   	   MPUI1610_SHOW(MPUI_CTRL),
		   	   MPUI1610_SHOW(MPUI_DSP_STATUS),
		   	   MPUI1610_SHOW(MPUI_DSP_BOOT_CONFIG),
		   	   MPUI1610_SHOW(MPUI_DSP_API_CONFIG),
		   	   MPUI1610_SHOW(EMIFF_SDRAM_CONFIG),
		   	   MPUI1610_SHOW(EMIFS_CONFIG));
		}

		g_read_completed++;
	} else if (g_read_completed >= 1) {
		 *eof = 1;
		 return 0;
	}
	g_read_completed++;

	*my_first_byte = page_buffer;
	return  my_buffer_offset;
}

/*
 *	omap_pm_prepare - Do preliminary suspend work.
 *	@state:		suspend state we're entering.
 *
 */

static int omap_pm_prepare(u32 state)
{
	int error = 0;

	switch (state)
	{
	case PM_SUSPEND_STANDBY:
	case PM_SUSPEND_MEM:
		break;

	case PM_SUSPEND_DISK:
		return -ENOTSUPP;

	default:
		return -EINVAL;
	}

	return error;
}


/*
 *	omap_pm_enter - Actually enter a sleep state.
 *	@state:		State we're entering.
 *
 */

static int omap_pm_enter(u32 state)
{
	switch (state)
	{
	case PM_SUSPEND_STANDBY:
	case PM_SUSPEND_MEM:
		omap_pm_suspend();
		break;

	case PM_SUSPEND_DISK:
		return -ENOTSUPP;

	default:
		return -EINVAL;
	}

	return 0;
}


/**
 *	omap_pm_finish - Finish up suspend sequence.
 *	@state:		State we're coming out of.
 *
 *	This is called after we wake back up (or if entering the sleep state
 *	failed).
 */

static int omap_pm_finish(u32 state)
{
	return 0;
}


struct pm_ops omap_pm_ops ={
	.pm_disk_mode = 0,
        .prepare        = omap_pm_prepare,
        .enter          = omap_pm_enter,
        .finish         = omap_pm_finish,
};

static int __init omap_pm_init(void)
{
	struct proc_dir_entry *entry;

	printk("Power Management for TI OMAP.\n");
	pm_idle = omap_pm_idle;
	/*
	 * We copy the assembler sleep/wakeup routines to SRAM.
	 * These routines need to be in SRAM as that's the only
	 * memory the MPU can see when it wakes up.
	 */

#ifdef	CONFIG_ARCH_OMAP1510
	if (cpu_is_omap1510()) {
		memcpy((void *)OMAP1510_SRAM_IDLE_SUSPEND, omap1510_idle_loop_suspend,
		       omap1510_idle_loop_suspend_sz);
		memcpy((void *)OMAP1510_SRAM_API_SUSPEND, omap1510_cpu_suspend,
		       omap1510_cpu_suspend_sz);
	} else
#endif
	if (cpu_is_omap1610() || cpu_is_omap1710()) {
		memcpy((void *)OMAP1610_SRAM_IDLE_SUSPEND, omap1610_idle_loop_suspend,
		       omap1610_idle_loop_suspend_sz);
		memcpy((void *)OMAP1610_SRAM_API_SUSPEND, omap1610_cpu_suspend,
		       omap1610_cpu_suspend_sz);
	} else if (cpu_is_omap5912()) {
		memcpy((void *)OMAP5912_SRAM_IDLE_SUSPEND, omap1610_idle_loop_suspend,
		       omap1610_idle_loop_suspend_sz);
		memcpy((void *)OMAP5912_SRAM_API_SUSPEND, omap1610_cpu_suspend,
		       omap1610_cpu_suspend_sz);
	}

	pm_set_ops(&omap_pm_ops);

	entry = create_proc_read_entry("pm", S_IWUSR | S_IRUGO, NULL,
	    omap_pm_read_proc, 0);
	if (entry) {
		entry->write_proc = (write_proc_t *)omap_pm_write_proc;
	}


	return 0;
}
__initcall(omap_pm_init);

#endif /* CONFIG_PROC_FS */

#ifdef CONFIG_SYSCTL

/*
 * ARGH!  ACPI people defined CTL_ACPI in linux/acpi.h rather than
 * linux/sysctl.h.
 */

#define CTL_ACPI 9999
#define APM_S1_SLP_TYP 19

/*
 * Send us to sleep.
 */

static int sysctl_omap_pm_suspend(void)
{
	int retval;

	retval = pm_send_all(PM_SUSPEND, (void *)3);

	if (retval == 0) {
		omap_pm_suspend();

		pm_send_all(PM_RESUME, (void *)0);
	}

	return retval;
}

static struct ctl_table pm_table[] =
{
	{APM_S1_SLP_TYP, "suspend", NULL, 0, 0600, NULL,
	    (proc_handler *)&sysctl_omap_pm_suspend},

	{0}
};

static struct ctl_table pm_dir_table[] =
{
	{CTL_ACPI, "pm", NULL, 0, 0555, pm_table},
	{0}
};

/*
 * Initialize power interface
 */
static int __init pm_init(void)
{
	register_sysctl_table(pm_dir_table, 1);
	return 0;
}

__initcall(pm_init);

#endif /* CONFIG_SYSCTL */