/* * Watchdog driver for CSR SiRFprimaII and SiRFatlasVI * * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company. * * Licensed under GPLv2 or later. */ #include #include #include #include #include #include #include #define CLOCK_FREQ 1000000 #define SIRFSOC_TIMER_COUNTER_LO 0x0000 #define SIRFSOC_TIMER_MATCH_0 0x0008 #define SIRFSOC_TIMER_INT_EN 0x0024 #define SIRFSOC_TIMER_WATCHDOG_EN 0x0028 #define SIRFSOC_TIMER_LATCH 0x0030 #define SIRFSOC_TIMER_LATCHED_LO 0x0034 #define SIRFSOC_TIMER_WDT_INDEX 5 #define SIRFSOC_WDT_MIN_TIMEOUT 30 /* 30 secs */ #define SIRFSOC_WDT_MAX_TIMEOUT (10 * 60) /* 10 mins */ #define SIRFSOC_WDT_DEFAULT_TIMEOUT 30 /* 30 secs */ static unsigned int timeout = SIRFSOC_WDT_DEFAULT_TIMEOUT; static bool nowayout = WATCHDOG_NOWAYOUT; module_param(timeout, uint, 0); module_param(nowayout, bool, 0); MODULE_PARM_DESC(timeout, "Default watchdog timeout (in seconds)"); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); static void __iomem *sirfsoc_wdt_base(struct watchdog_device *wdd) { return (void __iomem __force *)watchdog_get_drvdata(wdd); } static unsigned int sirfsoc_wdt_gettimeleft(struct watchdog_device *wdd) { u32 counter, match; void __iomem *wdt_base; int time_left; wdt_base = sirfsoc_wdt_base(wdd); counter = readl(wdt_base + SIRFSOC_TIMER_COUNTER_LO); match = readl(wdt_base + SIRFSOC_TIMER_MATCH_0 + (SIRFSOC_TIMER_WDT_INDEX << 2)); time_left = match - counter; return time_left / CLOCK_FREQ; } static int sirfsoc_wdt_updatetimeout(struct watchdog_device *wdd) { u32 counter, timeout_ticks; void __iomem *wdt_base; timeout_ticks = wdd->timeout * CLOCK_FREQ; wdt_base = sirfsoc_wdt_base(wdd); /* Enable the latch before reading the LATCH_LO register */ writel(1, wdt_base + SIRFSOC_TIMER_LATCH); /* Set the TO value */ counter = readl(wdt_base + SIRFSOC_TIMER_LATCHED_LO); counter += timeout_ticks; writel(counter, wdt_base + SIRFSOC_TIMER_MATCH_0 + (SIRFSOC_TIMER_WDT_INDEX << 2)); return 0; } static int sirfsoc_wdt_enable(struct watchdog_device *wdd) { void __iomem *wdt_base = sirfsoc_wdt_base(wdd); sirfsoc_wdt_updatetimeout(wdd); /* * NOTE: If interrupt is not enabled * then WD-Reset doesn't get generated at all. */ writel(readl(wdt_base + SIRFSOC_TIMER_INT_EN) | (1 << SIRFSOC_TIMER_WDT_INDEX), wdt_base + SIRFSOC_TIMER_INT_EN); writel(1, wdt_base + SIRFSOC_TIMER_WATCHDOG_EN); return 0; } static int sirfsoc_wdt_disable(struct watchdog_device *wdd) { void __iomem *wdt_base = sirfsoc_wdt_base(wdd); writel(0, wdt_base + SIRFSOC_TIMER_WATCHDOG_EN); writel(readl(wdt_base + SIRFSOC_TIMER_INT_EN) & (~(1 << SIRFSOC_TIMER_WDT_INDEX)), wdt_base + SIRFSOC_TIMER_INT_EN); return 0; } static int sirfsoc_wdt_settimeout(struct watchdog_device *wdd, unsigned int to) { wdd->timeout = to; sirfsoc_wdt_updatetimeout(wdd); return 0; } #define OPTIONS (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE) static const struct watchdog_info sirfsoc_wdt_ident = { .options = OPTIONS, .firmware_version = 0, .identity = "SiRFSOC Watchdog", }; static struct watchdog_ops sirfsoc_wdt_ops = { .owner = THIS_MODULE, .start = sirfsoc_wdt_enable, .stop = sirfsoc_wdt_disable, .get_timeleft = sirfsoc_wdt_gettimeleft, .ping = sirfsoc_wdt_updatetimeout, .set_timeout = sirfsoc_wdt_settimeout, }; static struct watchdog_device sirfsoc_wdd = { .info = &sirfsoc_wdt_ident, .ops = &sirfsoc_wdt_ops, .timeout = SIRFSOC_WDT_DEFAULT_TIMEOUT, .min_timeout = SIRFSOC_WDT_MIN_TIMEOUT, .max_timeout = SIRFSOC_WDT_MAX_TIMEOUT, }; static int sirfsoc_wdt_probe(struct platform_device *pdev) { struct resource *res; int ret; void __iomem *base; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) return PTR_ERR(base); watchdog_set_drvdata(&sirfsoc_wdd, (__force void *)base); watchdog_init_timeout(&sirfsoc_wdd, timeout, &pdev->dev); watchdog_set_nowayout(&sirfsoc_wdd, nowayout); sirfsoc_wdd.parent = &pdev->dev; ret = watchdog_register_device(&sirfsoc_wdd); if (ret) return ret; platform_set_drvdata(pdev, &sirfsoc_wdd); return 0; } static void sirfsoc_wdt_shutdown(struct platform_device *pdev) { struct watchdog_device *wdd = platform_get_drvdata(pdev); sirfsoc_wdt_disable(wdd); } static int sirfsoc_wdt_remove(struct platform_device *pdev) { sirfsoc_wdt_shutdown(pdev); return 0; } #ifdef CONFIG_PM_SLEEP static int sirfsoc_wdt_suspend(struct device *dev) { return 0; } static int sirfsoc_wdt_resume(struct device *dev) { struct watchdog_device *wdd = dev_get_drvdata(dev); /* * NOTE: Since timer controller registers settings are saved * and restored back by the timer-prima2.c, so we need not * update WD settings except refreshing timeout. */ sirfsoc_wdt_updatetimeout(wdd); return 0; } #endif static SIMPLE_DEV_PM_OPS(sirfsoc_wdt_pm_ops, sirfsoc_wdt_suspend, sirfsoc_wdt_resume); static const struct of_device_id sirfsoc_wdt_of_match[] = { { .compatible = "sirf,prima2-tick"}, {}, }; MODULE_DEVICE_TABLE(of, sirfsoc_wdt_of_match); static struct platform_driver sirfsoc_wdt_driver = { .driver = { .name = "sirfsoc-wdt", .pm = &sirfsoc_wdt_pm_ops, .of_match_table = sirfsoc_wdt_of_match, }, .probe = sirfsoc_wdt_probe, .remove = sirfsoc_wdt_remove, .shutdown = sirfsoc_wdt_shutdown, }; module_platform_driver(sirfsoc_wdt_driver); MODULE_DESCRIPTION("SiRF SoC watchdog driver"); MODULE_AUTHOR("Xianglong Du "); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:sirfsoc-wdt"); a8372bcf3e599cbd3aa891a216b26'>drm_atomic.h14443logplain -rw-r--r--drm_atomic_helper.h10607logplain -rw-r--r--drm_auth.h2260logplain -rw-r--r--drm_blend.h2700logplain -rw-r--r--drm_bridge.h7977logplain -rw-r--r--drm_cache.h1763logplain -rw-r--r--drm_color_mgmt.h2166logplain -rw-r--r--drm_connector.h28613logplain -rw-r--r--drm_crtc.h28999logplain -rw-r--r--drm_crtc_helper.h3301logplain -rw-r--r--drm_debugfs_crc.h2670logplain -rw-r--r--drm_displayid.h2850logplain -rw-r--r--drm_dp_dual_mode_helper.h4532logplain -rw-r--r--drm_dp_helper.h30638logplain -rw-r--r--drm_dp_mst_helper.h16260logplain -rw-r--r--drm_drv.h14861logplain -rw-r--r--drm_edid.h14335logplain -rw-r--r--drm_encoder.h8160logplain -rw-r--r--drm_encoder_slave.h6583logplain -rw-r--r--drm_fb_cma_helper.h1929logplain -rw-r--r--drm_fb_helper.h15125logplain -rw-r--r--drm_fixed.h4825logplain -rw-r--r--drm_flip_work.h3071logplain -rw-r--r--drm_fourcc.h2748logplain -rw-r--r--drm_framebuffer.h9623logplain -rw-r--r--drm_gem.h8052logplain -rw-r--r--drm_gem_cma_helper.h2286logplain -rw-r--r--drm_global.h2011logplain -rw-r--r--drm_hashtab.h3139logplain -rw-r--r--drm_irq.h6323logplain -rw-r--r--drm_legacy.h6933logplain -rw-r--r--drm_mem_util.h2468logplain -rw-r--r--drm_mipi_dsi.h10327logplain -rw-r--r--drm_mm.h11462logplain -rw-r--r--drm_mode_config.h23728logplain -rw-r--r--drm_mode_object.h4911logplain -rw-r--r--drm_modes.h17078logplain -rw-r--r--drm_modeset_helper.h1576logplain -rw-r--r--drm_modeset_helper_vtables.h41180logplain -rw-r--r--drm_modeset_lock.h4241logplain -rw-r--r--drm_of.h2034logplain -rw-r--r--drm_os_linux.h2230logplain -rw-r--r--drm_panel.h7079logplain -rw-r--r--drm_pciids.h68035logplain -rw-r--r--drm_plane.h19435logplain -rw-r--r--drm_plane_helper.h3186logplain -rw-r--r--drm_print.h3232logplain -rw-r--r--drm_property.h11460logplain -rw-r--r--drm_rect.h5103logplain -rw-r--r--drm_simple_kms_helper.h4090logplain -rw-r--r--drm_sysfs.h300logplain -rw-r--r--drm_vma_manager.h7840logplain -rw-r--r--gma_drm.h1033logplain d---------i2c109logplain