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Release 4.11 drivers/input/keyboard/sh_keysc.c

/*
 * SuperH KEYSC Keypad Driver
 *
 * Copyright (C) 2008 Magnus Damm
 *
 * Based on gpio_keys.c, Copyright 2005 Phil Blundell
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/input/sh_keysc.h>
#include <linux/bitmap.h>
#include <linux/pm_runtime.h>
#include <linux/io.h>
#include <linux/slab.h>

static const struct {
	


unsigned char kymd, keyout, keyin;
} 
sh_keysc_mode[] = {
	[SH_KEYSC_MODE_1] = { 0, 6, 5 },
	[SH_KEYSC_MODE_2] = { 1, 5, 6 },
	[SH_KEYSC_MODE_3] = { 2, 4, 7 },
	[SH_KEYSC_MODE_4] = { 3, 6, 6 },
	[SH_KEYSC_MODE_5] = { 4, 6, 7 },
	[SH_KEYSC_MODE_6] = { 5, 8, 8 },
};


struct sh_keysc_priv {
	
void __iomem *iomem_base;
	DECLARE_BITMAP(last_keys, SH_KEYSC_MAXKEYS);
	
struct input_dev *input;
	
struct sh_keysc_info pdata;
};


#define KYCR1 0

#define KYCR2 1

#define KYINDR 2

#define KYOUTDR 3


#define KYCR2_IRQ_LEVEL    0x10

#define KYCR2_IRQ_DISABLED 0x00


static unsigned long sh_keysc_read(struct sh_keysc_priv *p, int reg_nr) { return ioread16(p->iomem_base + (reg_nr << 2)); }

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Magnus Damm29100.00%1100.00%
Total29100.00%1100.00%


static void sh_keysc_write(struct sh_keysc_priv *p, int reg_nr, unsigned long value) { iowrite16(value, p->iomem_base + (reg_nr << 2)); }

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Magnus Damm33100.00%1100.00%
Total33100.00%1100.00%


static void sh_keysc_level_mode(struct sh_keysc_priv *p, unsigned long keys_set) { struct sh_keysc_info *pdata = &p->pdata; sh_keysc_write(p, KYOUTDR, 0); sh_keysc_write(p, KYCR2, KYCR2_IRQ_LEVEL | (keys_set << 8)); if (pdata->kycr2_delay) udelay(pdata->kycr2_delay); }

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Magnus Damm62100.00%1100.00%
Total62100.00%1100.00%


static void sh_keysc_map_dbg(struct device *dev, unsigned long *map, const char *str) { int k; for (k = 0; k < BITS_TO_LONGS(SH_KEYSC_MAXKEYS); k++) dev_dbg(dev, "%s[%d] 0x%lx\n", str, k, map[k]); }

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Magnus Damm56100.00%1100.00%
Total56100.00%1100.00%


static irqreturn_t sh_keysc_isr(int irq, void *dev_id) { struct platform_device *pdev = dev_id; struct sh_keysc_priv *priv = platform_get_drvdata(pdev); struct sh_keysc_info *pdata = &priv->pdata; int keyout_nr = sh_keysc_mode[pdata->mode].keyout; int keyin_nr = sh_keysc_mode[pdata->mode].keyin; DECLARE_BITMAP(keys, SH_KEYSC_MAXKEYS); DECLARE_BITMAP(keys0, SH_KEYSC_MAXKEYS); DECLARE_BITMAP(keys1, SH_KEYSC_MAXKEYS); unsigned char keyin_set, tmp; int i, k, n; dev_dbg(&pdev->dev, "isr!\n"); bitmap_fill(keys1, SH_KEYSC_MAXKEYS); bitmap_zero(keys0, SH_KEYSC_MAXKEYS); do { bitmap_zero(keys, SH_KEYSC_MAXKEYS); keyin_set = 0; sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED); for (i = 0; i < keyout_nr; i++) { n = keyin_nr * i; /* drive one KEYOUT pin low, read KEYIN pins */ sh_keysc_write(priv, KYOUTDR, 0xffff ^ (3 << (i * 2))); udelay(pdata->delay); tmp = sh_keysc_read(priv, KYINDR); /* set bit if key press has been detected */ for (k = 0; k < keyin_nr; k++) { if (tmp & (1 << k)) __set_bit(n + k, keys); } /* keep track of which KEYIN bits that have been set */ keyin_set |= tmp ^ ((1 << keyin_nr) - 1); } sh_keysc_level_mode(priv, keyin_set); bitmap_complement(keys, keys, SH_KEYSC_MAXKEYS); bitmap_and(keys1, keys1, keys, SH_KEYSC_MAXKEYS); bitmap_or(keys0, keys0, keys, SH_KEYSC_MAXKEYS); sh_keysc_map_dbg(&pdev->dev, keys, "keys"); } while (sh_keysc_read(priv, KYCR2) & 0x01); sh_keysc_map_dbg(&pdev->dev, priv->last_keys, "last_keys"); sh_keysc_map_dbg(&pdev->dev, keys0, "keys0"); sh_keysc_map_dbg(&pdev->dev, keys1, "keys1"); for (i = 0; i < SH_KEYSC_MAXKEYS; i++) { k = pdata->keycodes[i]; if (!k) continue; if (test_bit(i, keys0) == test_bit(i, priv->last_keys)) continue; if (test_bit(i, keys1) || test_bit(i, keys0)) { input_event(priv->input, EV_KEY, k, 1); __set_bit(i, priv->last_keys); } if (!test_bit(i, keys1)) { input_event(priv->input, EV_KEY, k, 0); __clear_bit(i, priv->last_keys); } } input_sync(priv->input); return IRQ_HANDLED; }

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Magnus Damm48399.59%480.00%
Kuninori Morimoto20.41%120.00%
Total485100.00%5100.00%


static int sh_keysc_probe(struct platform_device *pdev) { struct sh_keysc_priv *priv; struct sh_keysc_info *pdata; struct resource *res; struct input_dev *input; int i; int irq, error; if (!dev_get_platdata(&pdev->dev)) { dev_err(&pdev->dev, "no platform data defined\n"); error = -EINVAL; goto err0; } error = -ENXIO; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { dev_err(&pdev->dev, "failed to get I/O memory\n"); goto err0; } irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(&pdev->dev, "failed to get irq\n"); goto err0; } priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (priv == NULL) { dev_err(&pdev->dev, "failed to allocate driver data\n"); error = -ENOMEM; goto err0; } platform_set_drvdata(pdev, priv); memcpy(&priv->pdata, dev_get_platdata(&pdev->dev), sizeof(priv->pdata)); pdata = &priv->pdata; priv->iomem_base = ioremap_nocache(res->start, resource_size(res)); if (priv->iomem_base == NULL) { dev_err(&pdev->dev, "failed to remap I/O memory\n"); error = -ENXIO; goto err1; } priv->input = input_allocate_device(); if (!priv->input) { dev_err(&pdev->dev, "failed to allocate input device\n"); error = -ENOMEM; goto err2; } input = priv->input; input->evbit[0] = BIT_MASK(EV_KEY); input->name = pdev->name; input->phys = "sh-keysc-keys/input0"; input->dev.parent = &pdev->dev; input->id.bustype = BUS_HOST; input->id.vendor = 0x0001; input->id.product = 0x0001; input->id.version = 0x0100; input->keycode = pdata->keycodes; input->keycodesize = sizeof(pdata->keycodes[0]); input->keycodemax = ARRAY_SIZE(pdata->keycodes); error = request_threaded_irq(irq, NULL, sh_keysc_isr, IRQF_ONESHOT, dev_name(&pdev->dev), pdev); if (error) { dev_err(&pdev->dev, "failed to request IRQ\n"); goto err3; } for (i = 0; i < SH_KEYSC_MAXKEYS; i++) __set_bit(pdata->keycodes[i], input->keybit); __clear_bit(KEY_RESERVED, input->keybit); error = input_register_device(input); if (error) { dev_err(&pdev->dev, "failed to register input device\n"); goto err4; } pm_runtime_enable(&pdev->dev); pm_runtime_get_sync(&pdev->dev); sh_keysc_write(priv, KYCR1, (sh_keysc_mode[pdata->mode].kymd << 8) | pdata->scan_timing); sh_keysc_level_mode(priv, 0); device_init_wakeup(&pdev->dev, 1); return 0; err4: free_irq(irq, pdev); err3: input_free_device(input); err2: iounmap(priv->iomem_base); err1: kfree(priv); err0: return error; }

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PersonTokensPropCommitsCommitProp
Magnus Damm54590.83%770.00%
Dmitry Torokhov457.50%110.00%
Jingoo Han81.33%110.00%
Tetsuya Mukawa20.33%110.00%
Total600100.00%10100.00%


static int sh_keysc_remove(struct platform_device *pdev) { struct sh_keysc_priv *priv = platform_get_drvdata(pdev); sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED); input_unregister_device(priv->input); free_irq(platform_get_irq(pdev, 0), pdev); iounmap(priv->iomem_base); pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); kfree(priv); return 0; }

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Total80100.00%4100.00%

#ifdef CONFIG_PM_SLEEP
static int sh_keysc_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct sh_keysc_priv *priv = platform_get_drvdata(pdev); int irq = platform_get_irq(pdev, 0); unsigned short value; value = sh_keysc_read(priv, KYCR1); if (device_may_wakeup(dev)) { sh_keysc_write(priv, KYCR1, value | 0x80); enable_irq_wake(irq); } else { sh_keysc_write(priv, KYCR1, value & ~0x80); pm_runtime_put_sync(dev); } return 0; }

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PersonTokensPropCommitsCommitProp
Magnus Damm10199.02%685.71%
Dmitry Torokhov10.98%114.29%
Total102100.00%7100.00%


static int sh_keysc_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); int irq = platform_get_irq(pdev, 0); if (device_may_wakeup(dev)) disable_irq_wake(irq); else pm_runtime_get_sync(dev); return 0; }

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Magnus Damm52100.00%2100.00%
Total52100.00%2100.00%

#endif static SIMPLE_DEV_PM_OPS(sh_keysc_dev_pm_ops, sh_keysc_suspend, sh_keysc_resume); static struct platform_driver sh_keysc_device_driver = { .probe = sh_keysc_probe, .remove = sh_keysc_remove, .driver = { .name = "sh_keysc", .pm = &sh_keysc_dev_pm_ops, } }; module_platform_driver(sh_keysc_device_driver); MODULE_AUTHOR("Magnus Damm"); MODULE_DESCRIPTION("SuperH KEYSC Keypad Driver"); MODULE_LICENSE("GPL");

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Magnus Damm166995.70%1359.09%
Dmitry Torokhov583.33%418.18%
Jingoo Han80.46%14.55%
Tejun Heo30.17%14.55%
Tetsuya Mukawa20.11%14.55%
Kuninori Morimoto20.11%14.55%
JJ Ding20.11%14.55%
Total1744100.00%22100.00%
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