From patchwork Mon Sep 13 16:29:43 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cyril Chemparathy X-Patchwork-Id: 174932 Received: from bear.ext.ti.com (bear.ext.ti.com [192.94.94.41]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id o8DGVrEU016598 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 13 Sep 2010 16:32:19 GMT Received: from dlep33.itg.ti.com ([157.170.170.112]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id o8DGTwxX001322 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 13 Sep 2010 11:29:58 -0500 Received: from linux.omap.com (localhost [127.0.0.1]) by dlep33.itg.ti.com (8.13.7/8.13.7) with ESMTP id o8DGTvWr023407; Mon, 13 Sep 2010 11:29:57 -0500 (CDT) Received: from linux.omap.com (localhost [127.0.0.1]) by linux.omap.com (Postfix) with ESMTP id 86C348062C; Mon, 13 Sep 2010 11:29:55 -0500 (CDT) X-Original-To: davinci-linux-open-source@linux.davincidsp.com Delivered-To: davinci-linux-open-source@linux.davincidsp.com Received: from dlep36.itg.ti.com (dlep36.itg.ti.com [157.170.170.91]) by linux.omap.com (Postfix) with ESMTP id 0541780627 for ; Mon, 13 Sep 2010 11:29:52 -0500 (CDT) Received: from legion.dal.design.ti.com (localhost [127.0.0.1]) by dlep36.itg.ti.com (8.13.8/8.13.8) with ESMTP id o8DGTpjo011943; Mon, 13 Sep 2010 11:29:51 -0500 (CDT) Received: from gtrgwdeb (gtrgwdeb.telogy.design.ti.com [158.218.102.24]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id o8DGTpf14090; Mon, 13 Sep 2010 11:29:51 -0500 (CDT) Received: by gtrgwdeb (Postfix, from userid 39959) id 9BC901E790B; Mon, 13 Sep 2010 12:29:50 -0400 (EDT) From: Cyril Chemparathy To: linux-input@vger.kernel.org, davinci-linux-open-source@linux.davincidsp.com Subject: [PATCH 2/7] input: add driver for tnetv107x on-chip keypad controller Date: Mon, 13 Sep 2010 12:29:43 -0400 Message-Id: <1284395388-32687-3-git-send-email-cyril@ti.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1284395388-32687-1-git-send-email-cyril@ti.com> References: <1284395388-32687-1-git-send-email-cyril@ti.com> X-BeenThere: davinci-linux-open-source@linux.davincidsp.com X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: davinci-linux-open-source-bounces@linux.davincidsp.com Errors-To: davinci-linux-open-source-bounces@linux.davincidsp.com X-Greylist: Sender succeeded STARTTLS authentication, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Mon, 13 Sep 2010 16:32:20 +0000 (UTC) diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 9cc488d..0ea8648 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -457,4 +457,13 @@ config KEYBOARD_W90P910 To compile this driver as a module, choose M here: the module will be called w90p910_keypad. +config KEYBOARD_TNETV107X + tristate "TI TNETV107X keypad support" + depends on ARCH_DAVINCI_TNETV107X + help + Say Y here if you want to use the TNETV107X keypad. + + To compile this driver as a module, choose M here: the + module will be called tnetv107x-keypad. + endif diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 504b591..63261b0 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -41,3 +41,4 @@ obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o +obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o diff --git a/drivers/input/keyboard/tnetv107x-keypad.c b/drivers/input/keyboard/tnetv107x-keypad.c new file mode 100644 index 0000000..5039164 --- /dev/null +++ b/drivers/input/keyboard/tnetv107x-keypad.c @@ -0,0 +1,324 @@ +/* + * Texas Instruments TNETV107X Keypad Driver + * + * Copyright (C) 2010 Texas Instruments + * + * 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 version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define KEYPAD_ROWS 9 +#define KEYPAD_COLS 9 + +struct keypad_regs { + u32 rev; + u32 mode; + u32 mask; + u32 pol; + u32 dclock; + u32 rclock; + u32 stable_cnt; + u32 in_en; + u32 out; + u32 out_en; + u32 in; + u32 lock; + u32 pres[3]; +}; + +#define keypad_read(kp, reg) __raw_readl(&(kp)->regs->reg) +#define keypad_write(kp, reg, val) __raw_writel(val, &(kp)->regs->reg) + +struct keypad_data { + struct tnetv107x_keypad_data data; + struct input_dev *input_dev; + struct resource *res; + struct keypad_regs __iomem *regs; + struct clk *clk; + struct device *dev; + u32 irq_press; + u32 irq_release; + u32 curr_keys[3]; + u32 prev_keys[3]; +}; + +static void handle_change(struct keypad_data *kp) +{ + int bit, i; + + for (bit = 0; bit < (KEYPAD_ROWS * KEYPAD_COLS); bit++) { + int idx = bit / 32; + u32 mask = 1 << (bit % 32); + u32 curr = kp->curr_keys[idx] & mask; + u32 prev = kp->prev_keys[idx] & mask; + int row = bit / KEYPAD_COLS; + int col = bit % KEYPAD_COLS; + int ofs = row * kp->data.cols + col; + + if (col >= kp->data.cols || row >= kp->data.rows) + continue; + + if (curr && !prev) { + /* Report key press */ + if (kp->data.keynames && kp->data.keynames[ofs]) + dev_dbg(kp->dev, "%s (%d) pressed\n", + kp->data.keynames[ofs], ofs); + input_report_key(kp->input_dev, + kp->data.keymap[ofs], 1); + } else if (!curr && prev) { + /* Report key release */ + if (kp->data.keynames && kp->data.keynames[ofs]) + dev_dbg(kp->dev, "%s (%d) released\n", + kp->data.keynames[ofs], ofs); + input_report_key(kp->input_dev, + kp->data.keymap[ofs], 0); + } + } + + /* Update shadow copy */ + for (i = 0; i < 3; i++) + kp->prev_keys[i] = kp->curr_keys[i]; + + input_sync(kp->input_dev); +} + +static irqreturn_t keypad_irq_press(int irq, void *data) +{ + struct keypad_data *kp = (struct keypad_data *)data; + int i; + + for (i = 0; i < 3; i++) + kp->curr_keys[i] = keypad_read(kp, pres[i]); + handle_change(kp); + keypad_write(kp, lock, 0); /* Allow hardware updates */ + return IRQ_HANDLED; +} + +static irqreturn_t keypad_irq_release(int irq, void *data) +{ + struct keypad_data *kp = (struct keypad_data *)data; + int i; + + /* Hardware says all keys have been released */ + for (i = 0; i < 3; i++) + kp->curr_keys[i] = 0; + handle_change(kp); + return IRQ_HANDLED; +} + +static int tnetv107x_keypad_probe(struct platform_device *pdev) +{ + struct tnetv107x_keypad_data *pdata = pdev->dev.platform_data; + struct device *dev = &pdev->dev; + struct keypad_data *kp; + int i, ret = 0; + u32 rev = 0; + + ret = -EINVAL; + if (!pdata) { + dev_err(dev, "cannot find device data\n"); + return ret; + } + + ret = -ENOMEM; + kp = kzalloc(sizeof(struct keypad_data), GFP_KERNEL); + if (!kp) { + dev_err(dev, "cannot allocate device info\n"); + return ret; + } + + dev_set_drvdata(dev, kp); + kp->data = *pdata; + kp->dev = dev; + + ret = -ENOMEM; + kp->input_dev = input_allocate_device(); + if (!kp->input_dev) { + dev_err(dev, "cannot allocate input device\n"); + goto error0; + } + + ret = -ENODEV; + kp->irq_press = platform_get_irq_byname(pdev, "press"); + kp->irq_release = platform_get_irq_byname(pdev, "release"); + if (kp->irq_press < 0 || kp->irq_release < 0) { + dev_err(dev, "cannot determine device interrupts\n"); + goto error1; + } + + ret = -ENODEV; + kp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!kp->res) { + dev_err(dev, "cannot determine register area\n"); + goto error1; + } + + ret = -EINVAL; + if (!request_mem_region(kp->res->start, resource_size(kp->res), + pdev->name)) { + dev_err(dev, "cannot claim register memory\n"); + goto error1; + } + + ret = -ENOMEM; + kp->regs = ioremap(kp->res->start, resource_size(kp->res)); + if (!kp->regs) { + dev_err(dev, "cannot map register memory\n"); + goto error2; + } + + ret = -EINVAL; + kp->clk = clk_get(dev, NULL); + if (!kp->clk) { + dev_err(dev, "cannot claim device clock\n"); + goto error3; + } + clk_enable(kp->clk); + + /* Initialize device registers */ + keypad_write(kp, mode, 0); + keypad_write(kp, mask, ~((((1 << kp->data.rows)-1) << 9) | + (((1 << kp->data.cols)-1)))); + keypad_write(kp, pol, 0x3ffff); + keypad_write(kp, dclock, kp->data.debounce); + keypad_write(kp, rclock, 4*kp->data.debounce); + keypad_write(kp, stable_cnt, kp->data.stable); + + /* Enable Input */ + keypad_write(kp, in_en, 0); + mdelay(1); + keypad_write(kp, in_en, 1); + + ret = request_irq(kp->irq_press, keypad_irq_press, 0, + "keypad-press", kp); + if (ret < 0) { + dev_err(dev, "Could not allocate keypad press key irq\n"); + goto error4; + } + + ret = request_irq(kp->irq_release, keypad_irq_release, 0, + "keypad-release", kp); + if (ret < 0) { + dev_err(dev, "Could not allocate keypad release key irq\n"); + goto error5; + } + + set_bit(EV_KEY, kp->input_dev->evbit); + for (i = 0; i < kp->data.keymap_size; i++) + set_bit(kp->data.keymap[i] & KEY_MAX, kp->input_dev->keybit); + + kp->input_dev->name = "tnetv107x-keypad"; + kp->input_dev->phys = "tnetv107x-keypad/input0"; + kp->input_dev->dev.parent = &pdev->dev; + kp->input_dev->id.bustype = BUS_HOST; + kp->input_dev->id.vendor = 0x0001; + + rev = keypad_read(kp, rev); + kp->input_dev->id.product = ((rev >> 8) & 0x07); + kp->input_dev->id.version = ((rev >> 16) & 0xfff); + + kp->input_dev->keycode = kp->data.keymap; + kp->input_dev->keycodesize = sizeof(int); + kp->input_dev->keycodemax = kp->data.keymap_size; + ret = input_register_device(kp->input_dev); + if (ret < 0) { + dev_err(dev, "Could not register input device\n"); + goto error6; + } + + dev_info(dev, "registered keypad device\n"); + return 0; + +error6: + free_irq(kp->irq_release, kp); +error5: + free_irq(kp->irq_press, kp); +error4: + clk_disable(kp->clk); + clk_put(kp->clk); +error3: + iounmap(kp->regs); +error2: + release_mem_region(kp->res->start, resource_size(kp->res)); +error1: + input_free_device(kp->input_dev); +error0: + platform_set_drvdata(pdev, NULL); + kfree(kp); + return ret; +} + +static int tnetv107x_keypad_remove(struct platform_device *pdev) +{ + struct keypad_data *kp = dev_get_drvdata(&pdev->dev); + + if (kp) { + input_unregister_device(kp->input_dev); + free_irq(kp->irq_release, kp); + free_irq(kp->irq_press, kp); + clk_disable(kp->clk); + clk_put(kp->clk); + iounmap(kp->regs); + release_mem_region(kp->res->start, resource_size(kp->res)); + input_free_device(kp->input_dev); + platform_set_drvdata(pdev, NULL); + kfree(kp); + } + return 0; +} + +static int tnetv107x_keypad_suspend(struct platform_device *pdev, + pm_message_t state) +{ + /* Nothing yet */ + return 0; +} + +static int tnetv107x_keypad_resume(struct platform_device *pdev) +{ + /* Nothing yet */ + return 0; +} + +static struct platform_driver tnetv107x_keypad_driver = { + .probe = tnetv107x_keypad_probe, + .remove = tnetv107x_keypad_remove, + .suspend = tnetv107x_keypad_suspend, + .resume = tnetv107x_keypad_resume, + .driver.name = "tnetv107x-keypad", +}; + +static int __init tnetv107x_keypad_init(void) +{ + return platform_driver_register(&tnetv107x_keypad_driver); +} + +static void __exit tnetv107x_keypad_exit(void) +{ + platform_driver_unregister(&tnetv107x_keypad_driver); +} + +module_init(tnetv107x_keypad_init); +module_exit(tnetv107x_keypad_exit); + +MODULE_AUTHOR("Cyril Chemparathy"); +MODULE_DESCRIPTION("TNETV107X Keypad Driver"); +MODULE_LICENSE("GPL");