| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ezequiel García | 2213 | 69.90% | 17 | 41.46% |
| Sylver Bruneau | 285 | 9.00% | 1 | 2.44% |
| Chris Packham | 270 | 8.53% | 2 | 4.88% |
| Thomas Reitmayr | 119 | 3.76% | 2 | 4.88% |
| Axel Lin | 103 | 3.25% | 2 | 4.88% |
| Wim Van Sebroeck | 46 | 1.45% | 3 | 7.32% |
| Andrew Lunn | 36 | 1.14% | 2 | 4.88% |
| Fabio Porcedda | 18 | 0.57% | 1 | 2.44% |
| Jason Cooper | 16 | 0.51% | 1 | 2.44% |
| Nico Pitre | 15 | 0.47% | 2 | 4.88% |
| Maxim Kochetkov | 13 | 0.41% | 1 | 2.44% |
| Pratyush Anand | 11 | 0.35% | 1 | 2.44% |
| Joe Perches | 9 | 0.28% | 1 | 2.44% |
| Lubomir Rintel | 5 | 0.16% | 1 | 2.44% |
| Guenter Roeck | 4 | 0.13% | 1 | 2.44% |
| Colin Ian King | 1 | 0.03% | 1 | 2.44% |
| Uwe Kleine-König | 1 | 0.03% | 1 | 2.44% |
| Fabio Estevam | 1 | 0.03% | 1 | 2.44% |
| Total | 3166 | 41 |
/* * drivers/watchdog/orion_wdt.c * * Watchdog driver for Orion/Kirkwood processors * * Author: Sylver Bruneau <sylver.bruneau@googlemail.com> * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/watchdog.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/of.h> #include <linux/of_device.h> /* RSTOUT mask register physical address for Orion5x, Kirkwood and Dove */ #define ORION_RSTOUT_MASK_OFFSET 0x20108 /* Internal registers can be configured at any 1 MiB aligned address */ #define INTERNAL_REGS_MASK ~(SZ_1M - 1) /* * Watchdog timer block registers. */ #define TIMER_CTRL 0x0000 #define TIMER1_FIXED_ENABLE_BIT BIT(12) #define WDT_AXP_FIXED_ENABLE_BIT BIT(10) #define TIMER1_ENABLE_BIT BIT(2) #define TIMER_A370_STATUS 0x0004 #define WDT_A370_EXPIRED BIT(31) #define TIMER1_STATUS_BIT BIT(8) #define TIMER1_VAL_OFF 0x001c #define WDT_MAX_CYCLE_COUNT 0xffffffff #define WDT_A370_RATIO_MASK(v) ((v) << 16) #define WDT_A370_RATIO_SHIFT 5 #define WDT_A370_RATIO (1 << WDT_A370_RATIO_SHIFT) static bool nowayout = WATCHDOG_NOWAYOUT; static int heartbeat = -1; /* module parameter (seconds) */ struct orion_watchdog; struct orion_watchdog_data { int wdt_counter_offset; int wdt_enable_bit; int rstout_enable_bit; int rstout_mask_bit; int (*clock_init)(struct platform_device *, struct orion_watchdog *); int (*enabled)(struct orion_watchdog *); int (*start)(struct watchdog_device *); int (*stop)(struct watchdog_device *); }; struct orion_watchdog { struct watchdog_device wdt; void __iomem *reg; void __iomem *rstout; void __iomem *rstout_mask; unsigned long clk_rate; struct clk *clk; const struct orion_watchdog_data *data; }; static int orion_wdt_clock_init(struct platform_device *pdev, struct orion_watchdog *dev) { int ret; dev->clk = clk_get(&pdev->dev, NULL); if (IS_ERR(dev->clk)) return PTR_ERR(dev->clk); ret = clk_prepare_enable(dev->clk); if (ret) { clk_put(dev->clk); return ret; } dev->clk_rate = clk_get_rate(dev->clk); return 0; } static int armada370_wdt_clock_init(struct platform_device *pdev, struct orion_watchdog *dev) { int ret; dev->clk = clk_get(&pdev->dev, NULL); if (IS_ERR(dev->clk)) return PTR_ERR(dev->clk); ret = clk_prepare_enable(dev->clk); if (ret) { clk_put(dev->clk); return ret; } /* Setup watchdog input clock */ atomic_io_modify(dev->reg + TIMER_CTRL, WDT_A370_RATIO_MASK(WDT_A370_RATIO_SHIFT), WDT_A370_RATIO_MASK(WDT_A370_RATIO_SHIFT)); dev->clk_rate = clk_get_rate(dev->clk) / WDT_A370_RATIO; return 0; } static int armada375_wdt_clock_init(struct platform_device *pdev, struct orion_watchdog *dev) { int ret; dev->clk = of_clk_get_by_name(pdev->dev.of_node, "fixed"); if (!IS_ERR(dev->clk)) { ret = clk_prepare_enable(dev->clk); if (ret) { clk_put(dev->clk); return ret; } atomic_io_modify(dev->reg + TIMER_CTRL, WDT_AXP_FIXED_ENABLE_BIT, WDT_AXP_FIXED_ENABLE_BIT); dev->clk_rate = clk_get_rate(dev->clk); return 0; } /* Mandatory fallback for proper devicetree backward compatibility */ dev->clk = clk_get(&pdev->dev, NULL); if (IS_ERR(dev->clk)) return PTR_ERR(dev->clk); ret = clk_prepare_enable(dev->clk); if (ret) { clk_put(dev->clk); return ret; } atomic_io_modify(dev->reg + TIMER_CTRL, WDT_A370_RATIO_MASK(WDT_A370_RATIO_SHIFT), WDT_A370_RATIO_MASK(WDT_A370_RATIO_SHIFT)); dev->clk_rate = clk_get_rate(dev->clk) / WDT_A370_RATIO; return 0; } static int armadaxp_wdt_clock_init(struct platform_device *pdev, struct orion_watchdog *dev) { int ret; u32 val; dev->clk = of_clk_get_by_name(pdev->dev.of_node, "fixed"); if (IS_ERR(dev->clk)) return PTR_ERR(dev->clk); ret = clk_prepare_enable(dev->clk); if (ret) { clk_put(dev->clk); return ret; } /* Fix the wdt and timer1 clock freqency to 25MHz */ val = WDT_AXP_FIXED_ENABLE_BIT | TIMER1_FIXED_ENABLE_BIT; atomic_io_modify(dev->reg + TIMER_CTRL, val, val); dev->clk_rate = clk_get_rate(dev->clk); return 0; } static int orion_wdt_ping(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); /* Reload watchdog duration */ writel(dev->clk_rate * wdt_dev->timeout, dev->reg + dev->data->wdt_counter_offset); if (dev->wdt.info->options & WDIOF_PRETIMEOUT) writel(dev->clk_rate * (wdt_dev->timeout - wdt_dev->pretimeout), dev->reg + TIMER1_VAL_OFF); return 0; } static int armada375_start(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); u32 reg; /* Set watchdog duration */ writel(dev->clk_rate * wdt_dev->timeout, dev->reg + dev->data->wdt_counter_offset); if (dev->wdt.info->options & WDIOF_PRETIMEOUT) writel(dev->clk_rate * (wdt_dev->timeout - wdt_dev->pretimeout), dev->reg + TIMER1_VAL_OFF); /* Clear the watchdog expiration bit */ atomic_io_modify(dev->reg + TIMER_A370_STATUS, WDT_A370_EXPIRED, 0); /* Enable watchdog timer */ reg = dev->data->wdt_enable_bit; if (dev->wdt.info->options & WDIOF_PRETIMEOUT) reg |= TIMER1_ENABLE_BIT; atomic_io_modify(dev->reg + TIMER_CTRL, reg, reg); /* Enable reset on watchdog */ reg = readl(dev->rstout); reg |= dev->data->rstout_enable_bit; writel(reg, dev->rstout); atomic_io_modify(dev->rstout_mask, dev->data->rstout_mask_bit, 0); return 0; } static int armada370_start(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); u32 reg; /* Set watchdog duration */ writel(dev->clk_rate * wdt_dev->timeout, dev->reg + dev->data->wdt_counter_offset); /* Clear the watchdog expiration bit */ atomic_io_modify(dev->reg + TIMER_A370_STATUS, WDT_A370_EXPIRED, 0); /* Enable watchdog timer */ atomic_io_modify(dev->reg + TIMER_CTRL, dev->data->wdt_enable_bit, dev->data->wdt_enable_bit); /* Enable reset on watchdog */ reg = readl(dev->rstout); reg |= dev->data->rstout_enable_bit; writel(reg, dev->rstout); return 0; } static int orion_start(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); /* Set watchdog duration */ writel(dev->clk_rate * wdt_dev->timeout, dev->reg + dev->data->wdt_counter_offset); /* Enable watchdog timer */ atomic_io_modify(dev->reg + TIMER_CTRL, dev->data->wdt_enable_bit, dev->data->wdt_enable_bit); /* Enable reset on watchdog */ atomic_io_modify(dev->rstout, dev->data->rstout_enable_bit, dev->data->rstout_enable_bit); return 0; } static int orion_wdt_start(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); /* There are some per-SoC quirks to handle */ return dev->data->start(wdt_dev); } static int orion_stop(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); /* Disable reset on watchdog */ atomic_io_modify(dev->rstout, dev->data->rstout_enable_bit, 0); /* Disable watchdog timer */ atomic_io_modify(dev->reg + TIMER_CTRL, dev->data->wdt_enable_bit, 0); return 0; } static int armada375_stop(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); u32 reg, mask; /* Disable reset on watchdog */ atomic_io_modify(dev->rstout_mask, dev->data->rstout_mask_bit, dev->data->rstout_mask_bit); reg = readl(dev->rstout); reg &= ~dev->data->rstout_enable_bit; writel(reg, dev->rstout); /* Disable watchdog timer */ mask = dev->data->wdt_enable_bit; if (wdt_dev->info->options & WDIOF_PRETIMEOUT) mask |= TIMER1_ENABLE_BIT; atomic_io_modify(dev->reg + TIMER_CTRL, mask, 0); return 0; } static int armada370_stop(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); u32 reg; /* Disable reset on watchdog */ reg = readl(dev->rstout); reg &= ~dev->data->rstout_enable_bit; writel(reg, dev->rstout); /* Disable watchdog timer */ atomic_io_modify(dev->reg + TIMER_CTRL, dev->data->wdt_enable_bit, 0); return 0; } static int orion_wdt_stop(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); return dev->data->stop(wdt_dev); } static int orion_enabled(struct orion_watchdog *dev) { bool enabled, running; enabled = readl(dev->rstout) & dev->data->rstout_enable_bit; running = readl(dev->reg + TIMER_CTRL) & dev->data->wdt_enable_bit; return enabled && running; } static int armada375_enabled(struct orion_watchdog *dev) { bool masked, enabled, running; masked = readl(dev->rstout_mask) & dev->data->rstout_mask_bit; enabled = readl(dev->rstout) & dev->data->rstout_enable_bit; running = readl(dev->reg + TIMER_CTRL) & dev->data->wdt_enable_bit; return !masked && enabled && running; } static int orion_wdt_enabled(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); return dev->data->enabled(dev); } static unsigned int orion_wdt_get_timeleft(struct watchdog_device *wdt_dev) { struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); return readl(dev->reg + dev->data->wdt_counter_offset) / dev->clk_rate; } static struct watchdog_info orion_wdt_info = { .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, .identity = "Orion Watchdog", }; static const struct watchdog_ops orion_wdt_ops = { .owner = THIS_MODULE, .start = orion_wdt_start, .stop = orion_wdt_stop, .ping = orion_wdt_ping, .get_timeleft = orion_wdt_get_timeleft, }; static irqreturn_t orion_wdt_irq(int irq, void *devid) { panic("Watchdog Timeout"); return IRQ_HANDLED; } static irqreturn_t orion_wdt_pre_irq(int irq, void *devid) { struct orion_watchdog *dev = devid; atomic_io_modify(dev->reg + TIMER_A370_STATUS, TIMER1_STATUS_BIT, 0); watchdog_notify_pretimeout(&dev->wdt); return IRQ_HANDLED; } /* * The original devicetree binding for this driver specified only * one memory resource, so in order to keep DT backwards compatibility * we try to fallback to a hardcoded register address, if the resource * is missing from the devicetree. */ static void __iomem *orion_wdt_ioremap_rstout(struct platform_device *pdev, phys_addr_t internal_regs) { struct resource *res; phys_addr_t rstout; res = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (res) return devm_ioremap(&pdev->dev, res->start, resource_size(res)); rstout = internal_regs + ORION_RSTOUT_MASK_OFFSET; WARN(1, FW_BUG "falling back to hardcoded RSTOUT reg %pa\n", &rstout); return devm_ioremap(&pdev->dev, rstout, 0x4); } static const struct orion_watchdog_data orion_data = { .rstout_enable_bit = BIT(1), .wdt_enable_bit = BIT(4), .wdt_counter_offset = 0x24, .clock_init = orion_wdt_clock_init, .enabled = orion_enabled, .start = orion_start, .stop = orion_stop, }; static const struct orion_watchdog_data armada370_data = { .rstout_enable_bit = BIT(8), .wdt_enable_bit = BIT(8), .wdt_counter_offset = 0x34, .clock_init = armada370_wdt_clock_init, .enabled = orion_enabled, .start = armada370_start, .stop = armada370_stop, }; static const struct orion_watchdog_data armadaxp_data = { .rstout_enable_bit = BIT(8), .wdt_enable_bit = BIT(8), .wdt_counter_offset = 0x34, .clock_init = armadaxp_wdt_clock_init, .enabled = orion_enabled, .start = armada370_start, .stop = armada370_stop, }; static const struct orion_watchdog_data armada375_data = { .rstout_enable_bit = BIT(8), .rstout_mask_bit = BIT(10), .wdt_enable_bit = BIT(8), .wdt_counter_offset = 0x34, .clock_init = armada375_wdt_clock_init, .enabled = armada375_enabled, .start = armada375_start, .stop = armada375_stop, }; static const struct orion_watchdog_data armada380_data = { .rstout_enable_bit = BIT(8), .rstout_mask_bit = BIT(10), .wdt_enable_bit = BIT(8), .wdt_counter_offset = 0x34, .clock_init = armadaxp_wdt_clock_init, .enabled = armada375_enabled, .start = armada375_start, .stop = armada375_stop, }; static const struct of_device_id orion_wdt_of_match_table[] = { { .compatible = "marvell,orion-wdt", .data = &orion_data, }, { .compatible = "marvell,armada-370-wdt", .data = &armada370_data, }, { .compatible = "marvell,armada-xp-wdt", .data = &armadaxp_data, }, { .compatible = "marvell,armada-375-wdt", .data = &armada375_data, }, { .compatible = "marvell,armada-380-wdt", .data = &armada380_data, }, {}, }; MODULE_DEVICE_TABLE(of, orion_wdt_of_match_table); static int orion_wdt_get_regs(struct platform_device *pdev, struct orion_watchdog *dev) { struct device_node *node = pdev->dev.of_node; struct resource *res; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; dev->reg = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!dev->reg) return -ENOMEM; /* Each supported compatible has some RSTOUT register quirk */ if (of_device_is_compatible(node, "marvell,orion-wdt")) { dev->rstout = orion_wdt_ioremap_rstout(pdev, res->start & INTERNAL_REGS_MASK); if (!dev->rstout) return -ENODEV; } else if (of_device_is_compatible(node, "marvell,armada-370-wdt") || of_device_is_compatible(node, "marvell,armada-xp-wdt")) { /* Dedicated RSTOUT register, can be requested. */ dev->rstout = devm_platform_ioremap_resource(pdev, 1); if (IS_ERR(dev->rstout)) return PTR_ERR(dev->rstout); } else if (of_device_is_compatible(node, "marvell,armada-375-wdt") || of_device_is_compatible(node, "marvell,armada-380-wdt")) { /* Dedicated RSTOUT register, can be requested. */ dev->rstout = devm_platform_ioremap_resource(pdev, 1); if (IS_ERR(dev->rstout)) return PTR_ERR(dev->rstout); res = platform_get_resource(pdev, IORESOURCE_MEM, 2); if (!res) return -ENODEV; dev->rstout_mask = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!dev->rstout_mask) return -ENOMEM; } else { return -ENODEV; } return 0; } static int orion_wdt_probe(struct platform_device *pdev) { struct orion_watchdog *dev; const struct of_device_id *match; unsigned int wdt_max_duration; /* (seconds) */ int ret, irq; dev = devm_kzalloc(&pdev->dev, sizeof(struct orion_watchdog), GFP_KERNEL); if (!dev) return -ENOMEM; match = of_match_device(orion_wdt_of_match_table, &pdev->dev); if (!match) /* Default legacy match */ match = &orion_wdt_of_match_table[0]; dev->wdt.info = &orion_wdt_info; dev->wdt.ops = &orion_wdt_ops; dev->wdt.min_timeout = 1; dev->data = match->data; ret = orion_wdt_get_regs(pdev, dev); if (ret) return ret; ret = dev->data->clock_init(pdev, dev); if (ret) { dev_err(&pdev->dev, "cannot initialize clock\n"); return ret; } wdt_max_duration = WDT_MAX_CYCLE_COUNT / dev->clk_rate; dev->wdt.timeout = wdt_max_duration; dev->wdt.max_timeout = wdt_max_duration; dev->wdt.parent = &pdev->dev; watchdog_init_timeout(&dev->wdt, heartbeat, &pdev->dev); platform_set_drvdata(pdev, &dev->wdt); watchdog_set_drvdata(&dev->wdt, dev); /* * Let's make sure the watchdog is fully stopped, unless it's * explicitly enabled. This may be the case if the module was * removed and re-inserted, or if the bootloader explicitly * set a running watchdog before booting the kernel. */ if (!orion_wdt_enabled(&dev->wdt)) orion_wdt_stop(&dev->wdt); else set_bit(WDOG_HW_RUNNING, &dev->wdt.status); /* Request the IRQ only after the watchdog is disabled */ irq = platform_get_irq(pdev, 0); if (irq > 0) { /* * Not all supported platforms specify an interrupt for the * watchdog, so let's make it optional. */ ret = devm_request_irq(&pdev->dev, irq, orion_wdt_irq, 0, pdev->name, dev); if (ret < 0) { dev_err(&pdev->dev, "failed to request IRQ\n"); goto disable_clk; } } /* Optional 2nd interrupt for pretimeout */ irq = platform_get_irq(pdev, 1); if (irq > 0) { orion_wdt_info.options |= WDIOF_PRETIMEOUT; ret = devm_request_irq(&pdev->dev, irq, orion_wdt_pre_irq, 0, pdev->name, dev); if (ret < 0) { dev_err(&pdev->dev, "failed to request IRQ\n"); goto disable_clk; } } watchdog_set_nowayout(&dev->wdt, nowayout); ret = watchdog_register_device(&dev->wdt); if (ret) goto disable_clk; pr_info("Initial timeout %d sec%s\n", dev->wdt.timeout, nowayout ? ", nowayout" : ""); return 0; disable_clk: clk_disable_unprepare(dev->clk); clk_put(dev->clk); return ret; } static int orion_wdt_remove(struct platform_device *pdev) { struct watchdog_device *wdt_dev = platform_get_drvdata(pdev); struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev); watchdog_unregister_device(wdt_dev); clk_disable_unprepare(dev->clk); clk_put(dev->clk); return 0; } static void orion_wdt_shutdown(struct platform_device *pdev) { struct watchdog_device *wdt_dev = platform_get_drvdata(pdev); orion_wdt_stop(wdt_dev); } static struct platform_driver orion_wdt_driver = { .probe = orion_wdt_probe, .remove = orion_wdt_remove, .shutdown = orion_wdt_shutdown, .driver = { .name = "orion_wdt", .of_match_table = orion_wdt_of_match_table, }, }; module_platform_driver(orion_wdt_driver); MODULE_AUTHOR("Sylver Bruneau <sylver.bruneau@googlemail.com>"); MODULE_DESCRIPTION("Orion Processor Watchdog"); module_param(heartbeat, int, 0); MODULE_PARM_DESC(heartbeat, "Initial watchdog heartbeat in seconds"); module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:orion_wdt");
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