cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/keyboard/opencores-kbd.c

/*
 * OpenCores Keyboard Controller Driver
 * http://www.opencores.org/project,keyboardcontroller
 *
 * Copyright 2007-2009 HV Sistemas S.L.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>


struct opencores_kbd {
	
struct input_dev *input;
	
void __iomem *addr;
	
int irq;
	
unsigned short keycodes[128];
};


static irqreturn_t opencores_kbd_isr(int irq, void *dev_id) { struct opencores_kbd *opencores_kbd = dev_id; struct input_dev *input = opencores_kbd->input; unsigned char c; c = readb(opencores_kbd->addr); input_report_key(input, c & 0x7f, c & 0x80 ? 0 : 1); input_sync(input); return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Javier Herrero67100.00%1100.00%
Total67100.00%1100.00%


static int opencores_kbd_probe(struct platform_device *pdev) { struct input_dev *input; struct opencores_kbd *opencores_kbd; struct resource *res; int irq, i, error; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "missing board memory resource\n"); return -EINVAL; } irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(&pdev->dev, "missing board IRQ resource\n"); return -EINVAL; } opencores_kbd = devm_kzalloc(&pdev->dev, sizeof(*opencores_kbd), GFP_KERNEL); if (!opencores_kbd) return -ENOMEM; input = devm_input_allocate_device(&pdev->dev); if (!input) { dev_err(&pdev->dev, "failed to allocate input device\n"); return -ENOMEM; } opencores_kbd->input = input; opencores_kbd->addr = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(opencores_kbd->addr)) return PTR_ERR(opencores_kbd->addr); input->name = pdev->name; input->phys = "opencores-kbd/input0"; input->id.bustype = BUS_HOST; input->id.vendor = 0x0001; input->id.product = 0x0001; input->id.version = 0x0100; input->keycode = opencores_kbd->keycodes; input->keycodesize = sizeof(opencores_kbd->keycodes[0]); input->keycodemax = ARRAY_SIZE(opencores_kbd->keycodes); __set_bit(EV_KEY, input->evbit); for (i = 0; i < ARRAY_SIZE(opencores_kbd->keycodes); i++) { /* * OpenCores controller happens to have scancodes match * our KEY_* definitions. */ opencores_kbd->keycodes[i] = i; __set_bit(opencores_kbd->keycodes[i], input->keybit); } __clear_bit(KEY_RESERVED, input->keybit); error = devm_request_irq(&pdev->dev, irq, &opencores_kbd_isr, IRQF_TRIGGER_RISING, pdev->name, opencores_kbd); if (error) { dev_err(&pdev->dev, "unable to claim irq %d\n", irq); return error; } error = input_register_device(input); if (error) { dev_err(&pdev->dev, "unable to register input device\n"); return error; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Javier Herrero36189.14%133.33%
Pramod Gurav4210.37%133.33%
Dmitry Torokhov20.49%133.33%
Total405100.00%3100.00%

static struct platform_driver opencores_kbd_device_driver = { .probe = opencores_kbd_probe, .driver = { .name = "opencores-kbd", }, }; module_platform_driver(opencores_kbd_device_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Javier Herrero <jherrero@hvsistemas.es>"); MODULE_DESCRIPTION("Keyboard driver for OpenCores Keyboard Controller");

Overall Contributors

PersonTokensPropCommitsCommitProp
Javier Herrero51691.49%120.00%
Pramod Gurav427.45%120.00%
Tejun Heo30.53%120.00%
Dmitry Torokhov20.35%120.00%
JJ Ding10.18%120.00%
Total564100.00%5100.00%
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