Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759630AbXJDRDa (ORCPT ); Thu, 4 Oct 2007 13:03:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757723AbXJDRDW (ORCPT ); Thu, 4 Oct 2007 13:03:22 -0400 Received: from nwd2mail11.analog.com ([137.71.25.57]:12758 "EHLO nwd2mail11.analog.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757223AbXJDRDU (ORCPT ); Thu, 4 Oct 2007 13:03:20 -0400 X-IronPort-AV: i="4.21,230,1188792000"; d="scan'208"; a="41120080:sNHT40399695" Subject: [PATCH try #2] Blackfin BF54x Input Keypad controller driver From: Bryan Wu Reply-To: bryan.wu@analog.com To: Dmitry Torokhov , Michael Hennerich , Bryan Wu , linux-input@atrey.karlin.mff.cuni.cz, Linux Kernel , uclinux-dist-devel@blackfin.uclinux.org Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Analog Devices, Ltd. Date: Fri, 05 Oct 2007 01:03:14 +0800 Message-Id: <1191517394.6361.13.camel@roc-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 X-OriginalArrivalTime: 04 Oct 2007 17:03:18.0644 (UTC) FILETIME=[76249340:01C806A8] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 12361 Lines: 471 From: Michael Hennerich Blackfin BF54x Input Keypad controller driver: [try #2] Changelog: - Coding style issue fixes - using a temp variable for bf54x_kpad->input - Other updates according to Dmitry's review Cc: Dmitry Torokhov Signed-off-by: Michael Hennerich Signed-off-by: Bryan Wu --- drivers/input/keyboard/Kconfig | 9 + drivers/input/keyboard/Makefile | 2 +- drivers/input/keyboard/bf54x-keys.c | 387 ++++++++++++++++++++++++++ include/asm-blackfin/mach-bf548/bf54x_keys.h | 17 ++ 4 files changed, 414 insertions(+), 1 deletions(-) create mode 100644 drivers/input/keyboard/bf54x-keys.c create mode 100644 include/asm-blackfin/mach-bf548/bf54x_keys.h diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index c97d5eb..2136a9e 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -253,4 +253,13 @@ config KEYBOARD_GPIO To compile this driver as a module, choose M here: the module will be called gpio-keys. +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-keypad. + endif diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 28d211b..3123277 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -21,4 +21,4 @@ obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keyboard.o obj-$(CONFIG_KEYBOARD_AAED2000) += aaed2000_kbd.o obj-$(CONFIG_KEYBOARD_GPIO) += gpio_keys.o - +obj-$(CONFIG_KEYBOARD_BFIN) += bf54x-keys.o diff --git a/drivers/input/keyboard/bf54x-keys.c b/drivers/input/keyboard/bf54x-keys.c new file mode 100644 index 0000000..d3a4b38 --- /dev/null +++ b/drivers/input/keyboard/bf54x-keys.c @@ -0,0 +1,387 @@ +/* + * File: drivers/input/keyboard/bf54x-keys.c + * Based on: + * Author: Michael Hennerich + * + * 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 +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#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 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 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; + int lastkey; + struct timer_list timer; + unsigned int keyup_test_jiffies; +}; + +static inline int bfin_kpad_find_key(struct bfin_kpad_platform_data *pdata, u16 keyident) +{ + u16 i; + + for (i = 0; i < pdata->keymapsize; i++) + if ((pdata->keymap[i] >> 16) == keyident) + return pdata->keymap[i] & 0xffff; + return -1; +} + + +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 bfin_kpad_platform_data *pdata = pdev->dev.platform_data; + struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev); + int key; + u16 rowcol = bfin_read_KPAD_ROWCOL(); + + key = bfin_kpad_find_key(pdata, rowcol); + + input_report_key(bf54x_kpad->input, key, 1); + input_sync(bf54x_kpad->input); + + if (bfin_kpad_get_keypressed(bf54x_kpad)) { + disable_irq(bf54x_kpad->irq); + bf54x_kpad->lastkey = key; + bf54x_kpad->timer.expires = jiffies + + bf54x_kpad->keyup_test_jiffies; + add_timer(&bf54x_kpad->timer); + + return IRQ_HANDLED; + } + + input_report_key(bf54x_kpad->input, key, 0); + input_sync(bf54x_kpad->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); + + + 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(&per_rows[MAX_RC - pdata->rows], DRV_NAME)) { + printk(KERN_ERR DRV_NAME + ": Requesting Peripherals failed\n"); + error = -EFAULT; + goto out; + } + + if (peripheral_request_list(&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->cdev.dev = &pdev->dev; + input->private = bf54x_kpad; + + input->id.bustype = BUS_HOST; + input->id.vendor = 0x0001; + input->id.product = 0x0001; + input->id.version = 0x0100; + + input->keycode = pdata->keymap; + input->keycodesize = sizeof(unsigned short); + input->keycodemax = pdata->keymapsize; + + /* setup input device */ + set_bit(EV_KEY, input->evbit); + + if (pdata->repeat) + set_bit(EV_REP, input->evbit); + + for (i = 0; i < pdata->keymapsize; i++) + __set_bit(pdata->keymap[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 */ + + init_timer(&bf54x_kpad->timer); + bf54x_kpad->timer.function = bfin_kpad_timer; + bf54x_kpad->timer.data = (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(&per_cols[MAX_RC - pdata->cols]); +out1: + peripheral_free_list(&per_rows[MAX_RC - pdata->rows]); +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); + + peripheral_free_list(&per_rows[MAX_RC - pdata->rows]); + peripheral_free_list(&per_cols[MAX_RC - pdata->cols]); + + input_unregister_device(bf54x_kpad->input); + + kfree(bf54x_kpad); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM +static int bfin_kpad_suspend(struct platform_device *pdev, pm_message_t state) +{ + return 0; +} + +static int bfin_kpad_resume(struct platform_device *pdev) +{ + + return 0; +} +#else +#define bfin_kpad_suspend NULL +#define bfin_kpad_resume NULL +#endif + +struct platform_driver bfin_kpad_device_driver = { + .probe = bfin_kpad_probe, + .remove = __devexit_p(bfin_kpad_remove), + .suspend = bfin_kpad_suspend, + .resume = bfin_kpad_resume, + .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 "); +MODULE_DESCRIPTION("Keypad driver for BF54x Processors"); diff --git a/include/asm-blackfin/mach-bf548/bf54x_keys.h b/include/asm-blackfin/mach-bf548/bf54x_keys.h new file mode 100644 index 0000000..a872a2f --- /dev/null +++ b/include/asm-blackfin/mach-bf548/bf54x_keys.h @@ -0,0 +1,17 @@ +#ifndef _BFIN_KPAD_H +#define _BFIN_KPAD_H + +struct bfin_kpad_platform_data { + int rows; + int cols; + 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 -- 1.5.2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/