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Release 4.11 drivers/input/misc/bfin_rotary.c

/*
 * Rotary counter driver for Analog Devices Blackfin Processors
 *
 * Copyright 2008-2009 Analog Devices Inc.
 * Licensed under the GPL-2 or later.
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/platform_data/bfin_rotary.h>

#include <asm/portmux.h>


#define CNT_CONFIG_OFF		0	
/* CNT Config Offset */

#define CNT_IMASK_OFF		4	
/* CNT Interrupt Mask Offset */

#define CNT_STATUS_OFF		8	
/* CNT Status Offset */

#define CNT_COMMAND_OFF		12	
/* CNT Command Offset */

#define CNT_DEBOUNCE_OFF	16	
/* CNT Debounce Offset */

#define CNT_COUNTER_OFF		20	
/* CNT Counter Offset */

#define CNT_MAX_OFF		24	
/* CNT Maximum Count Offset */

#define CNT_MIN_OFF		28	
/* CNT Minimum Count Offset */


struct bfin_rot {
	
struct input_dev *input;
	
void __iomem *base;
	
int irq;
	
unsigned int up_key;
	
unsigned int down_key;
	
unsigned int button_key;
	
unsigned int rel_code;

	
unsigned short mode;
	
unsigned short debounce;

	
unsigned short cnt_config;
	
unsigned short cnt_imask;
	
unsigned short cnt_debounce;
};


static void report_key_event(struct input_dev *input, int keycode) { /* simulate a press-n-release */ input_report_key(input, keycode, 1); input_sync(input); input_report_key(input, keycode, 0); input_sync(input); }

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Michael Hennerich43100.00%1100.00%
Total43100.00%1100.00%


static void report_rotary_event(struct bfin_rot *rotary, int delta) { struct input_dev *input = rotary->input; if (rotary->up_key) { report_key_event(input, delta > 0 ? rotary->up_key : rotary->down_key); } else { input_report_rel(input, rotary->rel_code, delta); input_sync(input); } }

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Michael Hennerich67100.00%1100.00%
Total67100.00%1100.00%


static irqreturn_t bfin_rotary_isr(int irq, void *dev_id) { struct bfin_rot *rotary = dev_id; int delta; switch (readw(rotary->base + CNT_STATUS_OFF)) { case ICII: break; case UCII: case DCII: delta = readl(rotary->base + CNT_COUNTER_OFF); if (delta) report_rotary_event(rotary, delta); break; case CZMII: report_key_event(rotary->input, rotary->button_key); break; default: break; } writew(W1LCNT_ZERO, rotary->base + CNT_COMMAND_OFF); /* Clear COUNTER */ writew(-1, rotary->base + CNT_STATUS_OFF); /* Clear STATUS */ return IRQ_HANDLED; }

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Michael Hennerich8372.81%133.33%
Sonic Zhang3026.32%133.33%
Dmitry Torokhov10.88%133.33%
Total114100.00%3100.00%


static int bfin_rotary_open(struct input_dev *input) { struct bfin_rot *rotary = input_get_drvdata(input); unsigned short val; if (rotary->mode & ROT_DEBE) writew(rotary->debounce & DPRESCALE, rotary->base + CNT_DEBOUNCE_OFF); writew(rotary->mode & ~CNTE, rotary->base + CNT_CONFIG_OFF); val = UCIE | DCIE; if (rotary->button_key) val |= CZMIE; writew(val, rotary->base + CNT_IMASK_OFF); writew(rotary->mode | CNTE, rotary->base + CNT_CONFIG_OFF); return 0; }

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Dmitry Torokhov109100.00%1100.00%
Total109100.00%1100.00%


static void bfin_rotary_close(struct input_dev *input) { struct bfin_rot *rotary = input_get_drvdata(input); writew(0, rotary->base + CNT_CONFIG_OFF); writew(0, rotary->base + CNT_IMASK_OFF); }

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Dmitry Torokhov43100.00%1100.00%
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static void bfin_rotary_free_action(void *data) { peripheral_free_list(data); }

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Sonic Zhang15100.00%1100.00%
Total15100.00%1100.00%


static int bfin_rotary_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; const struct bfin_rotary_platform_data *pdata = dev_get_platdata(dev); struct bfin_rot *rotary; struct resource *res; struct input_dev *input; int error; /* Basic validation */ if ((pdata->rotary_up_key && !pdata->rotary_down_key) || (!pdata->rotary_up_key && pdata->rotary_down_key)) { return -EINVAL; } if (pdata->pin_list) { error = peripheral_request_list(pdata->pin_list, dev_name(dev)); if (error) { dev_err(dev, "requesting peripherals failed: %d\n", error); return error; } error = devm_add_action_or_reset(dev, bfin_rotary_free_action, pdata->pin_list); if (error) { dev_err(dev, "setting cleanup action failed: %d\n", error); return error; } } rotary = devm_kzalloc(dev, sizeof(struct bfin_rot), GFP_KERNEL); if (!rotary) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); rotary->base = devm_ioremap_resource(dev, res); if (IS_ERR(rotary->base)) return PTR_ERR(rotary->base); input = devm_input_allocate_device(dev); if (!input) return -ENOMEM; rotary->input = input; rotary->up_key = pdata->rotary_up_key; rotary->down_key = pdata->rotary_down_key; rotary->button_key = pdata->rotary_button_key; rotary->rel_code = pdata->rotary_rel_code; rotary->mode = pdata->mode; rotary->debounce = pdata->debounce; input->name = pdev->name; input->phys = "bfin-rotary/input0"; input->dev.parent = dev; input_set_drvdata(input, rotary); input->id.bustype = BUS_HOST; input->id.vendor = 0x0001; input->id.product = 0x0001; input->id.version = 0x0100; input->open = bfin_rotary_open; input->close = bfin_rotary_close; if (rotary->up_key) { __set_bit(EV_KEY, input->evbit); __set_bit(rotary->up_key, input->keybit); __set_bit(rotary->down_key, input->keybit); } else { __set_bit(EV_REL, input->evbit); __set_bit(rotary->rel_code, input->relbit); } if (rotary->button_key) { __set_bit(EV_KEY, input->evbit); __set_bit(rotary->button_key, input->keybit); } /* Quiesce the device before requesting irq */ bfin_rotary_close(input); rotary->irq = platform_get_irq(pdev, 0); if (rotary->irq < 0) { dev_err(dev, "No rotary IRQ specified\n"); return -ENOENT; } error = devm_request_irq(dev, rotary->irq, bfin_rotary_isr, 0, dev_name(dev), rotary); if (error) { dev_err(dev, "unable to claim irq %d; error %d\n", rotary->irq, error); return error; } error = input_register_device(input); if (error) { dev_err(dev, "unable to register input device (%d)\n", error); return error; } platform_set_drvdata(pdev, rotary); device_init_wakeup(dev, 1); return 0; }

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Michael Hennerich37164.86%112.50%
Sonic Zhang16428.67%337.50%
Dmitry Torokhov356.12%225.00%
Guenter Roeck10.17%112.50%
Jingoo Han10.17%112.50%
Total572100.00%8100.00%


static int __maybe_unused bfin_rotary_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct bfin_rot *rotary = platform_get_drvdata(pdev); rotary->cnt_config = readw(rotary->base + CNT_CONFIG_OFF); rotary->cnt_imask = readw(rotary->base + CNT_IMASK_OFF); rotary->cnt_debounce = readw(rotary->base + CNT_DEBOUNCE_OFF); if (device_may_wakeup(&pdev->dev)) enable_irq_wake(rotary->irq); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich6672.53%133.33%
Sonic Zhang2426.37%133.33%
Dmitry Torokhov11.10%133.33%
Total91100.00%3100.00%


static int __maybe_unused bfin_rotary_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct bfin_rot *rotary = platform_get_drvdata(pdev); writew(rotary->cnt_debounce, rotary->base + CNT_DEBOUNCE_OFF); writew(rotary->cnt_imask, rotary->base + CNT_IMASK_OFF); writew(rotary->cnt_config & ~CNTE, rotary->base + CNT_CONFIG_OFF); if (device_may_wakeup(&pdev->dev)) disable_irq_wake(rotary->irq); if (rotary->cnt_config & CNTE) writew(rotary->cnt_config, rotary->base + CNT_CONFIG_OFF); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich8674.78%133.33%
Sonic Zhang2824.35%133.33%
Dmitry Torokhov10.87%133.33%
Total115100.00%3100.00%

static SIMPLE_DEV_PM_OPS(bfin_rotary_pm_ops, bfin_rotary_suspend, bfin_rotary_resume); static struct platform_driver bfin_rotary_device_driver = { .probe = bfin_rotary_probe, .driver = { .name = "bfin-rotary", .pm = &bfin_rotary_pm_ops, }, }; module_platform_driver(bfin_rotary_device_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); MODULE_DESCRIPTION("Rotary Counter driver for Blackfin Processors"); MODULE_ALIAS("platform:bfin-rotary");

Overall Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich83561.53%18.33%
Sonic Zhang31122.92%433.33%
Dmitry Torokhov20515.11%325.00%
Tejun Heo30.22%18.33%
Jingoo Han10.07%18.33%
JJ Ding10.07%18.33%
Guenter Roeck10.07%18.33%
Total1357100.00%12100.00%
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