Input: add support for Blackfin BF54x Keypad controller (8f740ef3) · Commits · e / devices / android_kernel_fairphone_FP5

arch/blackfin/mach-bf548/boards/ezkit.c

+3 −3

Original line number	Original line	Diff line number	Diff line
	@@ -88,7 +88,7 @@ static struct platform_device bf54x_lq043_device = {
	#endif		#endif

	#if defined(CONFIG_KEYBOARD_BFIN) \|\| defined(CONFIG_KEYBOARD_BFIN_MODULE)		#if defined(CONFIG_KEYBOARD_BFIN) \|\| defined(CONFIG_KEYBOARD_BFIN_MODULE)
	static int bf548_keymap[] = {		static const unsigned int bf548_keymap[] = {
	KEYVAL(0, 0, KEY_ENTER),		KEYVAL(0, 0, KEY_ENTER),
	KEYVAL(0, 1, KEY_HELP),		KEYVAL(0, 1, KEY_HELP),
	KEYVAL(0, 2, KEY_0),		KEYVAL(0, 2, KEY_0),

drivers/input/keyboard/Kconfig

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -284,4 +284,13 @@ config KEYBOARD_MAPLE
	To compile this driver as a module, choose M here: the		To compile this driver as a module, choose M here: the
	module will be called maple_keyb.		module will be called maple_keyb.

			config KEYBOARD_BFIN
			tristate "Blackfin BF54x keypad support"
			depends on BF54x
			help
			Say Y here if you want to use the BF54x keypad.

			To compile this driver as a module, choose M here: the
			module will be called bf54x-keys.

	endif		endif

drivers/input/keyboard/Makefile

+1 −1

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	@@ -24,4 +24,4 @@ obj-$(CONFIG_KEYBOARD_GPIO) += gpio_keys.o
	obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o		obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o
	obj-$(CONFIG_KEYBOARD_HP7XX) += jornada720_kbd.o		obj-$(CONFIG_KEYBOARD_HP7XX) += jornada720_kbd.o
	obj-$(CONFIG_KEYBOARD_MAPLE) += maple_keyb.o		obj-$(CONFIG_KEYBOARD_MAPLE) += maple_keyb.o
			obj-$(CONFIG_KEYBOARD_BFIN) += bf54x-keys.o

drivers/input/keyboard/bf54x-keys.c

0 → 100644

+382 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* File: drivers/input/keyboard/bf54x-keys.c
			* Based on:
			* Author: Michael Hennerich <hennerich@blackfin.uclinux.org>
			*
			* Created:
			* Description: keypad driver for Analog Devices Blackfin BF54x Processors
			*
			*
			* Modified:
			* Copyright 2007 Analog Devices Inc.
			*
			* Bugs: Enter bugs at http://blackfin.uclinux.org/
			*
			* This program is free software; you can redistribute it and/or modify
			* it under the terms of the GNU General Public License as published by
			* the Free Software Foundation; either version 2 of the License, or
			* (at your option) any later version.
			*
			* This program is distributed in the hope that it will be useful,
			* but WITHOUT ANY WARRANTY; without even the implied warranty of
			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
			* GNU General Public License for more details.
			*
			* You should have received a copy of the GNU General Public License
			* along with this program; if not, see the file COPYING, or write
			* to the Free Software Foundation, Inc.,
			* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
			*/

			#include <linux/module.h>
			#include <linux/version.h>

			#include <linux/init.h>
			#include <linux/fs.h>
			#include <linux/interrupt.h>
			#include <linux/irq.h>
			#include <linux/sched.h>
			#include <linux/pm.h>
			#include <linux/sysctl.h>
			#include <linux/proc_fs.h>
			#include <linux/delay.h>
			#include <linux/platform_device.h>
			#include <linux/input.h>
			#include <linux/irq.h>

			#include <asm/portmux.h>
			#include <asm/mach/bf54x_keys.h>

			#define DRV_NAME "bf54x-keys"
			#define TIME_SCALE 100 /* 100 ns */
			#define MAX_MULT (0xFF * TIME_SCALE)
			#define MAX_RC 8 /* Max Row/Col */

			static const u16 per_rows[] = {
			P_KEY_ROW7,
			P_KEY_ROW6,
			P_KEY_ROW5,
			P_KEY_ROW4,
			P_KEY_ROW3,
			P_KEY_ROW2,
			P_KEY_ROW1,
			P_KEY_ROW0,
			0
			};

			static const u16 per_cols[] = {
			P_KEY_COL7,
			P_KEY_COL6,
			P_KEY_COL5,
			P_KEY_COL4,
			P_KEY_COL3,
			P_KEY_COL2,
			P_KEY_COL1,
			P_KEY_COL0,
			0
			};

			struct bf54x_kpad {
			struct input_dev *input;
			int irq;
			unsigned short lastkey;
			unsigned short *keycode;
			struct timer_list timer;
			unsigned int keyup_test_jiffies;
			};

			static inline int bfin_kpad_find_key(struct bf54x_kpad *bf54x_kpad,
			struct input_dev *input, u16 keyident)
			{
			u16 i;

			for (i = 0; i < input->keycodemax; i++)
			if (bf54x_kpad->keycode[i + input->keycodemax] == keyident)
			return bf54x_kpad->keycode[i];
			return -1;
			}

			static inline void bfin_keycodecpy(unsigned short *keycode,
			const unsigned int *pdata_kc,
			unsigned short keymapsize)
			{
			unsigned int i;

			for (i = 0; i < keymapsize; i++) {
			keycode[i] = pdata_kc[i] & 0xffff;
			keycode[i + keymapsize] = pdata_kc[i] >> 16;
			}
			}

			static inline u16 bfin_kpad_get_prescale(u32 timescale)
			{
			u32 sclk = get_sclk();

			return ((((sclk / 1000) * timescale) / 1024) - 1);
			}

			static inline u16 bfin_kpad_get_keypressed(struct bf54x_kpad *bf54x_kpad)
			{
			return (bfin_read_KPAD_STAT() & KPAD_PRESSED);
			}

			static inline void bfin_kpad_clear_irq(void)
			{
			bfin_write_KPAD_STAT(0xFFFF);
			bfin_write_KPAD_ROWCOL(0xFFFF);
			}

			static void bfin_kpad_timer(unsigned long data)
			{
			struct platform_device pdev = (struct platform_device ) data;
			struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);

			if (bfin_kpad_get_keypressed(bf54x_kpad)) {
			/* Try again later */
			mod_timer(&bf54x_kpad->timer,
			jiffies + bf54x_kpad->keyup_test_jiffies);
			return;
			}

			input_report_key(bf54x_kpad->input, bf54x_kpad->lastkey, 0);
			input_sync(bf54x_kpad->input);

			/* Clear IRQ Status */

			bfin_kpad_clear_irq();
			enable_irq(bf54x_kpad->irq);
			}

			static irqreturn_t bfin_kpad_isr(int irq, void *dev_id)
			{
			struct platform_device *pdev = dev_id;
			struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
			struct input_dev *input = bf54x_kpad->input;
			int key;
			u16 rowcol = bfin_read_KPAD_ROWCOL();

			key = bfin_kpad_find_key(bf54x_kpad, input, rowcol);

			input_report_key(input, key, 1);
			input_sync(input);

			if (bfin_kpad_get_keypressed(bf54x_kpad)) {
			disable_irq(bf54x_kpad->irq);
			bf54x_kpad->lastkey = key;
			mod_timer(&bf54x_kpad->timer,
			jiffies + bf54x_kpad->keyup_test_jiffies);
			} else {
			input_report_key(input, key, 0);
			input_sync(input);

			bfin_kpad_clear_irq();
			}

			return IRQ_HANDLED;
			}

			static int __devinit bfin_kpad_probe(struct platform_device *pdev)
			{
			struct bf54x_kpad *bf54x_kpad;
			struct bfin_kpad_platform_data *pdata = pdev->dev.platform_data;
			struct input_dev *input;
			int i, error;

			if (!pdata->rows \|\| !pdata->cols \|\| !pdata->keymap) {
			printk(KERN_ERR DRV_NAME
			": No rows, cols or keymap from pdata\n");
			return -EINVAL;
			}

			if (!pdata->keymapsize \|\|
			pdata->keymapsize > (pdata->rows * pdata->cols)) {
			printk(KERN_ERR DRV_NAME ": Invalid keymapsize\n");
			return -EINVAL;
			}

			bf54x_kpad = kzalloc(sizeof(struct bf54x_kpad), GFP_KERNEL);
			if (!bf54x_kpad)
			return -ENOMEM;

			platform_set_drvdata(pdev, bf54x_kpad);

			/* Allocate memory for keymap followed by private LUT */
			bf54x_kpad->keycode = kmalloc(pdata->keymapsize *
			sizeof(unsigned short) * 2, GFP_KERNEL);
			if (!bf54x_kpad->keycode) {
			error = -ENOMEM;
			goto out;
			}

			if (!pdata->debounce_time \|\| !pdata->debounce_time > MAX_MULT \|\|
			!pdata->coldrive_time \|\| !pdata->coldrive_time > MAX_MULT) {
			printk(KERN_ERR DRV_NAME
			": Invalid Debounce/Columdrive Time from pdata\n");
			bfin_write_KPAD_MSEL(0xFF0); /* Default MSEL */
			} else {
			bfin_write_KPAD_MSEL(
			((pdata->debounce_time / TIME_SCALE)
			& DBON_SCALE) \|
			(((pdata->coldrive_time / TIME_SCALE) << 8)
			& COLDRV_SCALE));

			}

			if (!pdata->keyup_test_interval)
			bf54x_kpad->keyup_test_jiffies = msecs_to_jiffies(50);
			else
			bf54x_kpad->keyup_test_jiffies =
			msecs_to_jiffies(pdata->keyup_test_interval);

			if (peripheral_request_list((u16 *)&per_rows[MAX_RC - pdata->rows],
			DRV_NAME)) {
			printk(KERN_ERR DRV_NAME
			": Requesting Peripherals failed\n");
			error = -EFAULT;
			goto out0;
			}

			if (peripheral_request_list((u16 *)&per_cols[MAX_RC - pdata->cols],
			DRV_NAME)) {
			printk(KERN_ERR DRV_NAME
			": Requesting Peripherals failed\n");
			error = -EFAULT;
			goto out1;
			}

			bf54x_kpad->irq = platform_get_irq(pdev, 0);
			if (bf54x_kpad->irq < 0) {
			error = -ENODEV;
			goto out2;
			}

			error = request_irq(bf54x_kpad->irq, bfin_kpad_isr,
			IRQF_SAMPLE_RANDOM, DRV_NAME, pdev);
			if (error) {
			printk(KERN_ERR DRV_NAME
			": unable to claim irq %d; error %d\n",
			bf54x_kpad->irq, error);
			error = -EBUSY;
			goto out2;
			}

			input = input_allocate_device();
			if (!input) {
			error = -ENOMEM;
			goto out3;
			}

			bf54x_kpad->input = input;

			input->name = pdev->name;
			input->phys = "bf54x-keys/input0";
			input->dev.parent = &pdev->dev;

			input_set_drvdata(input, bf54x_kpad);

			input->id.bustype = BUS_HOST;
			input->id.vendor = 0x0001;
			input->id.product = 0x0001;
			input->id.version = 0x0100;

			input->keycodesize = sizeof(unsigned short);
			input->keycodemax = pdata->keymapsize;
			input->keycode = bf54x_kpad->keycode;

			bfin_keycodecpy(bf54x_kpad->keycode, pdata->keymap, pdata->keymapsize);

			/* setup input device */
			__set_bit(EV_KEY, input->evbit);

			if (pdata->repeat)
			__set_bit(EV_REP, input->evbit);

			for (i = 0; i < input->keycodemax; i++)
			__set_bit(bf54x_kpad->keycode[i] & KEY_MAX, input->keybit);
			__clear_bit(KEY_RESERVED, input->keybit);

			error = input_register_device(input);
			if (error) {
			printk(KERN_ERR DRV_NAME
			": Unable to register input device (%d)\n", error);
			goto out4;
			}

			/* Init Keypad Key Up/Release test timer */

			setup_timer(&bf54x_kpad->timer, bfin_kpad_timer, (unsigned long) pdev);

			bfin_write_KPAD_PRESCALE(bfin_kpad_get_prescale(TIME_SCALE));

			bfin_write_KPAD_CTL((((pdata->cols - 1) << 13) & KPAD_COLEN) \|
			(((pdata->rows - 1) << 10) & KPAD_ROWEN) \|
			(2 & KPAD_IRQMODE));

			bfin_write_KPAD_CTL(bfin_read_KPAD_CTL() \| KPAD_EN);

			printk(KERN_ERR DRV_NAME
			": Blackfin BF54x Keypad registered IRQ %d\n", bf54x_kpad->irq);

			return 0;

			out4:
			input_free_device(input);
			out3:
			free_irq(bf54x_kpad->irq, pdev);
			out2:
			peripheral_free_list((u16 *)&per_cols[MAX_RC - pdata->cols]);
			out1:
			peripheral_free_list((u16 *)&per_rows[MAX_RC - pdata->rows]);
			out0:
			kfree(bf54x_kpad->keycode);
			out:
			kfree(bf54x_kpad);
			platform_set_drvdata(pdev, NULL);

			return error;
			}

			static int __devexit bfin_kpad_remove(struct platform_device *pdev)
			{
			struct bfin_kpad_platform_data *pdata = pdev->dev.platform_data;
			struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);

			del_timer_sync(&bf54x_kpad->timer);
			free_irq(bf54x_kpad->irq, pdev);

			input_unregister_device(bf54x_kpad->input);

			peripheral_free_list((u16 *)&per_rows[MAX_RC - pdata->rows]);
			peripheral_free_list((u16 *)&per_cols[MAX_RC - pdata->cols]);

			kfree(bf54x_kpad->keycode);
			kfree(bf54x_kpad);
			platform_set_drvdata(pdev, NULL);

			return 0;
			}

			struct platform_driver bfin_kpad_device_driver = {
			.probe = bfin_kpad_probe,
			.remove = __devexit_p(bfin_kpad_remove),
			.driver = {
			.name = DRV_NAME,
			}
			};

			static int __init bfin_kpad_init(void)
			{
			return platform_driver_register(&bfin_kpad_device_driver);
			}

			static void __exit bfin_kpad_exit(void)
			{
			platform_driver_unregister(&bfin_kpad_device_driver);
			}

			module_init(bfin_kpad_init);
			module_exit(bfin_kpad_exit);

			MODULE_LICENSE("GPL");
			MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
			MODULE_DESCRIPTION("Keypad driver for BF54x Processors");

include/asm-blackfin/mach-bf548/bf54x_keys.h

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Original line number	Original line	Diff line number	Diff line
			#ifndef _BFIN_KPAD_H
			#define _BFIN_KPAD_H

			struct bfin_kpad_platform_data {
			int rows;
			int cols;
			const unsigned int *keymap;
			unsigned short keymapsize;
			unsigned short repeat;
			u32 debounce_time; /* in ns */
			u32 coldrive_time; /* in ns */
			u32 keyup_test_interval; /* in ms */
			};

			#define KEYVAL(col, row, val) (((1 << col) << 24) \| ((1 << row) << 16) \| (val))

			#endif