| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Guoxiong Yan | 1512 | 81.86% | 1 | 8.33% |
| Shawn Guo | 203 | 10.99% | 1 | 8.33% |
| Alexey Khoroshilov | 80 | 4.33% | 1 | 8.33% |
| Ruqiang Ju | 37 | 2.00% | 1 | 8.33% |
| Sean Young | 7 | 0.38% | 3 | 25.00% |
| Andi Shyti | 3 | 0.16% | 1 | 8.33% |
| Thomas Gleixner | 2 | 0.11% | 1 | 8.33% |
| Sudeep Holla | 1 | 0.05% | 1 | 8.33% |
| Zhangfei Gao | 1 | 0.05% | 1 | 8.33% |
| Mauro Carvalho Chehab | 1 | 0.05% | 1 | 8.33% |
| Total | 1847 | 12 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2014 Linaro Ltd. * Copyright (c) 2014 Hisilicon Limited. */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <media/rc-core.h> #define IR_ENABLE 0x00 #define IR_CONFIG 0x04 #define CNT_LEADS 0x08 #define CNT_LEADE 0x0c #define CNT_SLEADE 0x10 #define CNT0_B 0x14 #define CNT1_B 0x18 #define IR_BUSY 0x1c #define IR_DATAH 0x20 #define IR_DATAL 0x24 #define IR_INTM 0x28 #define IR_INTS 0x2c #define IR_INTC 0x30 #define IR_START 0x34 /* interrupt mask */ #define INTMS_SYMBRCV (BIT(24) | BIT(8)) #define INTMS_TIMEOUT (BIT(25) | BIT(9)) #define INTMS_OVERFLOW (BIT(26) | BIT(10)) #define INT_CLR_OVERFLOW BIT(18) #define INT_CLR_TIMEOUT BIT(17) #define INT_CLR_RCV BIT(16) #define INT_CLR_RCVTIMEOUT (BIT(16) | BIT(17)) #define IR_CLK_ENABLE BIT(4) #define IR_CLK_RESET BIT(5) /* IR_ENABLE register bits */ #define IR_ENABLE_EN BIT(0) #define IR_ENABLE_EN_EXTRA BIT(8) #define IR_CFG_WIDTH_MASK 0xffff #define IR_CFG_WIDTH_SHIFT 16 #define IR_CFG_FORMAT_MASK 0x3 #define IR_CFG_FORMAT_SHIFT 14 #define IR_CFG_INT_LEVEL_MASK 0x3f #define IR_CFG_INT_LEVEL_SHIFT 8 /* only support raw mode */ #define IR_CFG_MODE_RAW BIT(7) #define IR_CFG_FREQ_MASK 0x7f #define IR_CFG_FREQ_SHIFT 0 #define IR_CFG_INT_THRESHOLD 1 /* symbol start from low to high, symbol stream end at high*/ #define IR_CFG_SYMBOL_FMT 0 #define IR_CFG_SYMBOL_MAXWIDTH 0x3e80 #define IR_HIX5HD2_NAME "hix5hd2-ir" /* Need to set extra bit for enabling IR */ #define HIX5HD2_FLAG_EXTRA_ENABLE BIT(0) struct hix5hd2_soc_data { u32 clk_reg; u32 flags; }; static const struct hix5hd2_soc_data hix5hd2_data = { .clk_reg = 0x48, }; static const struct hix5hd2_soc_data hi3796cv300_data = { .clk_reg = 0x60, .flags = HIX5HD2_FLAG_EXTRA_ENABLE, }; struct hix5hd2_ir_priv { int irq; void __iomem *base; struct device *dev; struct rc_dev *rdev; struct regmap *regmap; struct clk *clock; unsigned long rate; const struct hix5hd2_soc_data *socdata; }; static int hix5hd2_ir_clk_enable(struct hix5hd2_ir_priv *dev, bool on) { u32 clk_reg = dev->socdata->clk_reg; u32 val; int ret = 0; if (dev->regmap) { regmap_read(dev->regmap, clk_reg, &val); if (on) { val &= ~IR_CLK_RESET; val |= IR_CLK_ENABLE; } else { val &= ~IR_CLK_ENABLE; val |= IR_CLK_RESET; } regmap_write(dev->regmap, clk_reg, val); } else { if (on) ret = clk_prepare_enable(dev->clock); else clk_disable_unprepare(dev->clock); } return ret; } static inline void hix5hd2_ir_enable(struct hix5hd2_ir_priv *priv) { u32 val = IR_ENABLE_EN; if (priv->socdata->flags & HIX5HD2_FLAG_EXTRA_ENABLE) val |= IR_ENABLE_EN_EXTRA; writel_relaxed(val, priv->base + IR_ENABLE); } static int hix5hd2_ir_config(struct hix5hd2_ir_priv *priv) { int timeout = 10000; u32 val, rate; hix5hd2_ir_enable(priv); while (readl_relaxed(priv->base + IR_BUSY)) { if (timeout--) { udelay(1); } else { dev_err(priv->dev, "IR_BUSY timeout\n"); return -ETIMEDOUT; } } /* Now only support raw mode, with symbol start from low to high */ rate = DIV_ROUND_CLOSEST(priv->rate, 1000000); val = IR_CFG_SYMBOL_MAXWIDTH & IR_CFG_WIDTH_MASK << IR_CFG_WIDTH_SHIFT; val |= IR_CFG_SYMBOL_FMT & IR_CFG_FORMAT_MASK << IR_CFG_FORMAT_SHIFT; val |= (IR_CFG_INT_THRESHOLD - 1) & IR_CFG_INT_LEVEL_MASK << IR_CFG_INT_LEVEL_SHIFT; val |= IR_CFG_MODE_RAW; val |= (rate - 1) & IR_CFG_FREQ_MASK << IR_CFG_FREQ_SHIFT; writel_relaxed(val, priv->base + IR_CONFIG); writel_relaxed(0x00, priv->base + IR_INTM); /* write arbitrary value to start */ writel_relaxed(0x01, priv->base + IR_START); return 0; } static int hix5hd2_ir_open(struct rc_dev *rdev) { struct hix5hd2_ir_priv *priv = rdev->priv; int ret; ret = hix5hd2_ir_clk_enable(priv, true); if (ret) return ret; ret = hix5hd2_ir_config(priv); if (ret) { hix5hd2_ir_clk_enable(priv, false); return ret; } return 0; } static void hix5hd2_ir_close(struct rc_dev *rdev) { struct hix5hd2_ir_priv *priv = rdev->priv; hix5hd2_ir_clk_enable(priv, false); } static irqreturn_t hix5hd2_ir_rx_interrupt(int irq, void *data) { u32 symb_num, symb_val, symb_time; u32 data_l, data_h; u32 irq_sr, i; struct hix5hd2_ir_priv *priv = data; irq_sr = readl_relaxed(priv->base + IR_INTS); if (irq_sr & INTMS_OVERFLOW) { /* * we must read IR_DATAL first, then we can clean up * IR_INTS availably since logic would not clear * fifo when overflow, drv do the job */ ir_raw_event_reset(priv->rdev); symb_num = readl_relaxed(priv->base + IR_DATAH); for (i = 0; i < symb_num; i++) readl_relaxed(priv->base + IR_DATAL); writel_relaxed(INT_CLR_OVERFLOW, priv->base + IR_INTC); dev_info(priv->dev, "overflow, level=%d\n", IR_CFG_INT_THRESHOLD); } if ((irq_sr & INTMS_SYMBRCV) || (irq_sr & INTMS_TIMEOUT)) { struct ir_raw_event ev = {}; symb_num = readl_relaxed(priv->base + IR_DATAH); for (i = 0; i < symb_num; i++) { symb_val = readl_relaxed(priv->base + IR_DATAL); data_l = ((symb_val & 0xffff) * 10); data_h = ((symb_val >> 16) & 0xffff) * 10; symb_time = (data_l + data_h) / 10; ev.duration = US_TO_NS(data_l); ev.pulse = true; ir_raw_event_store(priv->rdev, &ev); if (symb_time < IR_CFG_SYMBOL_MAXWIDTH) { ev.duration = US_TO_NS(data_h); ev.pulse = false; ir_raw_event_store(priv->rdev, &ev); } else { ir_raw_event_set_idle(priv->rdev, true); } } if (irq_sr & INTMS_SYMBRCV) writel_relaxed(INT_CLR_RCV, priv->base + IR_INTC); if (irq_sr & INTMS_TIMEOUT) writel_relaxed(INT_CLR_TIMEOUT, priv->base + IR_INTC); } /* Empty software fifo */ ir_raw_event_handle(priv->rdev); return IRQ_HANDLED; } static const struct of_device_id hix5hd2_ir_table[] = { { .compatible = "hisilicon,hix5hd2-ir", &hix5hd2_data, }, { .compatible = "hisilicon,hi3796cv300-ir", &hi3796cv300_data, }, {}, }; MODULE_DEVICE_TABLE(of, hix5hd2_ir_table); static int hix5hd2_ir_probe(struct platform_device *pdev) { struct rc_dev *rdev; struct device *dev = &pdev->dev; struct resource *res; struct hix5hd2_ir_priv *priv; struct device_node *node = pdev->dev.of_node; const struct of_device_id *of_id; const char *map_name; int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; of_id = of_match_device(hix5hd2_ir_table, dev); if (!of_id) { dev_err(dev, "Unable to initialize IR data\n"); return -ENODEV; } priv->socdata = of_id->data; priv->regmap = syscon_regmap_lookup_by_phandle(node, "hisilicon,power-syscon"); if (IS_ERR(priv->regmap)) { dev_info(dev, "no power-reg\n"); priv->regmap = NULL; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); priv->base = devm_ioremap_resource(dev, res); if (IS_ERR(priv->base)) return PTR_ERR(priv->base); priv->irq = platform_get_irq(pdev, 0); if (priv->irq < 0) return priv->irq; rdev = rc_allocate_device(RC_DRIVER_IR_RAW); if (!rdev) return -ENOMEM; priv->clock = devm_clk_get(dev, NULL); if (IS_ERR(priv->clock)) { dev_err(dev, "clock not found\n"); ret = PTR_ERR(priv->clock); goto err; } ret = clk_prepare_enable(priv->clock); if (ret) goto err; priv->rate = clk_get_rate(priv->clock); rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; rdev->priv = priv; rdev->open = hix5hd2_ir_open; rdev->close = hix5hd2_ir_close; rdev->driver_name = IR_HIX5HD2_NAME; map_name = of_get_property(node, "linux,rc-map-name", NULL); rdev->map_name = map_name ?: RC_MAP_EMPTY; rdev->device_name = IR_HIX5HD2_NAME; rdev->input_phys = IR_HIX5HD2_NAME "/input0"; rdev->input_id.bustype = BUS_HOST; rdev->input_id.vendor = 0x0001; rdev->input_id.product = 0x0001; rdev->input_id.version = 0x0100; rdev->rx_resolution = US_TO_NS(10); rdev->timeout = US_TO_NS(IR_CFG_SYMBOL_MAXWIDTH * 10); ret = rc_register_device(rdev); if (ret < 0) goto clkerr; if (devm_request_irq(dev, priv->irq, hix5hd2_ir_rx_interrupt, 0, pdev->name, priv) < 0) { dev_err(dev, "IRQ %d register failed\n", priv->irq); ret = -EINVAL; goto regerr; } priv->rdev = rdev; priv->dev = dev; platform_set_drvdata(pdev, priv); return ret; regerr: rc_unregister_device(rdev); rdev = NULL; clkerr: clk_disable_unprepare(priv->clock); err: rc_free_device(rdev); dev_err(dev, "Unable to register device (%d)\n", ret); return ret; } static int hix5hd2_ir_remove(struct platform_device *pdev) { struct hix5hd2_ir_priv *priv = platform_get_drvdata(pdev); clk_disable_unprepare(priv->clock); rc_unregister_device(priv->rdev); return 0; } #ifdef CONFIG_PM_SLEEP static int hix5hd2_ir_suspend(struct device *dev) { struct hix5hd2_ir_priv *priv = dev_get_drvdata(dev); clk_disable_unprepare(priv->clock); hix5hd2_ir_clk_enable(priv, false); return 0; } static int hix5hd2_ir_resume(struct device *dev) { struct hix5hd2_ir_priv *priv = dev_get_drvdata(dev); int ret; ret = hix5hd2_ir_clk_enable(priv, true); if (ret) return ret; ret = clk_prepare_enable(priv->clock); if (ret) { hix5hd2_ir_clk_enable(priv, false); return ret; } hix5hd2_ir_enable(priv); writel_relaxed(0x00, priv->base + IR_INTM); writel_relaxed(0xff, priv->base + IR_INTC); writel_relaxed(0x01, priv->base + IR_START); return 0; } #endif static SIMPLE_DEV_PM_OPS(hix5hd2_ir_pm_ops, hix5hd2_ir_suspend, hix5hd2_ir_resume); static struct platform_driver hix5hd2_ir_driver = { .driver = { .name = IR_HIX5HD2_NAME, .of_match_table = hix5hd2_ir_table, .pm = &hix5hd2_ir_pm_ops, }, .probe = hix5hd2_ir_probe, .remove = hix5hd2_ir_remove, }; module_platform_driver(hix5hd2_ir_driver); MODULE_DESCRIPTION("IR controller driver for hix5hd2 platforms"); MODULE_AUTHOR("Guoxiong Yan <yanguoxiong@huawei.com>"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:hix5hd2-ir");
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