From patchwork Thu Sep 16 19:54:40 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cyril Chemparathy X-Patchwork-Id: 186002 Received: from devils.ext.ti.com (devils.ext.ti.com [198.47.26.153]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id o8GJt6R7031398 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 16 Sep 2010 19:55:42 GMT Received: from dlep35.itg.ti.com ([157.170.170.118]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id o8GJt5Qt029653 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 16 Sep 2010 14:55:06 -0500 Received: from linux.omap.com (localhost [127.0.0.1]) by dlep35.itg.ti.com (8.13.7/8.13.7) with ESMTP id o8GJt1kS027684 for ; Thu, 16 Sep 2010 14:55:04 -0500 (CDT) Received: from linux.omap.com (localhost [127.0.0.1]) by linux.omap.com (Postfix) with ESMTP id 88E4E80656 for ; Thu, 16 Sep 2010 14:54:59 -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 93FD680626 for ; Thu, 16 Sep 2010 14:54:48 -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 o8GJskKq029649; Thu, 16 Sep 2010 14:54:46 -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 o8GJsjf19135; Thu, 16 Sep 2010 14:54:45 -0500 (CDT) Received: by gtrgwdeb (Postfix, from userid 39959) id 4290E1E7CC6; Thu, 16 Sep 2010 15:54:45 -0400 (EDT) From: Cyril Chemparathy To: linux-input@vger.kernel.org, davinci-linux-open-source@linux.davincidsp.com Subject: [PATCH v2 1/5] input: add driver for tnetv107x on-chip keypad controller Date: Thu, 16 Sep 2010 15:54:40 -0400 Message-Id: <1284666884-10374-2-git-send-email-cyril@ti.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1284666884-10374-1-git-send-email-cyril@ti.com> References: <1284666884-10374-1-git-send-email-cyril@ti.com> Cc: dmitry.torokhov@gmail.com, shubhrajyoti@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+patchwork-davinci=patchwork.kernel.org@linux.davincidsp.com Errors-To: davinci-linux-open-source-bounces+patchwork-davinci=patchwork.kernel.org@linux.davincidsp.com X-Greylist: Sender succeeded STARTTLS authentication, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Thu, 16 Sep 2010 19:55:42 +0000 (UTC) diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 9cc488d..df1facb 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -424,6 +424,15 @@ config KEYBOARD_OMAP To compile this driver as a module, choose M here: the module will be called omap-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. + config KEYBOARD_TWL4030 tristate "TI TWL4030/TWL5030/TPS659x0 keypad support" depends on TWL4030_CORE diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 504b591..dc04518 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -38,6 +38,7 @@ obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o +obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o diff --git a/drivers/input/keyboard/tnetv107x-keypad.c b/drivers/input/keyboard/tnetv107x-keypad.c new file mode 100644 index 0000000..c262cb4 --- /dev/null +++ b/drivers/input/keyboard/tnetv107x-keypad.c @@ -0,0 +1,329 @@ +/* + * 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 BITS(x) (BIT(x) - 1) + +#define KEYPAD_ROWS 9 +#define KEYPAD_COLS 9 + +#define DEBOUNCE_MIN BIT(10) +#define DEBOUNCE_MAX BITS(30) + +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 input_dev *input_dev; + struct resource *res; + struct keypad_regs __iomem *regs; + struct clk *clk; + struct device *dev; + u32 irq_press; + u32 irq_release; + int rows, cols, row_shift; + int debounce_ms, active_low; + unsigned short *keycodes; + u32 prev_keys[3]; +}; + +static irqreturn_t keypad_irq(int irq, void *data) +{ + struct keypad_data *kp = (struct keypad_data *)data; + int i, bit, val, row, col, code; + u32 curr_keys[3]; + u32 change; + + memset(curr_keys, 0, sizeof(curr_keys)); + if (irq == kp->irq_press) + for (i = 0; i < 3; i++) + curr_keys[i] = keypad_read(kp, pres[i]); + + for (i = 0; i < 3; i++) { + change = curr_keys[i] ^ kp->prev_keys[i]; + + while (change) { + bit = fls(change) - 1; + change ^= BIT(bit); + val = curr_keys[i] & BIT(bit); + bit += i * 32; + row = bit / KEYPAD_COLS; + col = bit % KEYPAD_COLS; + + code = MATRIX_SCAN_CODE(row, col, kp->row_shift); + input_event(kp->input_dev, EV_MSC, MSC_SCAN, code); + input_report_key(kp->input_dev, kp->keycodes[code], + val); + } + } + input_sync(kp->input_dev); + memcpy(kp->prev_keys, curr_keys, sizeof(curr_keys)); + + if (irq == kp->irq_press) + keypad_write(kp, lock, 0); /* Allow hardware updates */ + + return IRQ_HANDLED; +} + +static int keypad_start(struct input_dev *dev) +{ + struct keypad_data *kp = input_get_drvdata(dev); + unsigned long mask, debounce, clk_rate_khz; + int error; + + clk_enable(kp->clk); + clk_rate_khz = clk_get_rate(kp->clk) / 1000; + + /* Initialize device registers */ + keypad_write(kp, mode, 0); + + mask = BITS(kp->rows) << KEYPAD_COLS; + mask |= BITS(kp->cols); + keypad_write(kp, mask, ~mask); + + keypad_write(kp, pol, kp->active_low ? 0 : 0x3ffff); + debounce = kp->debounce_ms * clk_rate_khz; + debounce = min(debounce, DEBOUNCE_MAX); + debounce = max(debounce, DEBOUNCE_MIN); + keypad_write(kp, dclock, debounce); + keypad_write(kp, rclock, 4 * debounce); + keypad_write(kp, stable_cnt, 3); + keypad_write(kp, in_en, 1); + + error = request_irq(kp->irq_press, keypad_irq, 0, "key-press", kp); + if (error < 0) { + dev_err(kp->dev, "Could not allocate keypad press key irq\n"); + clk_disable(kp->clk); + return error; + } + + error = request_irq(kp->irq_release, keypad_irq, 0, "key-release", kp); + if (error < 0) { + dev_err(kp->dev, "Could not allocate keypad release key irq\n"); + free_irq(kp->irq_press, kp); + clk_disable(kp->clk); + return error; + } + + return 0; +} + +static void keypad_stop(struct input_dev *dev) +{ + struct keypad_data *kp = input_get_drvdata(dev); + + free_irq(kp->irq_press, kp); + free_irq(kp->irq_release, kp); + clk_disable(kp->clk); +} + +static int __devinit keypad_probe(struct platform_device *pdev) +{ + const struct matrix_keypad_platform_data *pdata; + const struct matrix_keymap_data *keymap_data; + struct device *dev = &pdev->dev; + struct keypad_data *kp; + int error = 0, sz; + u32 rev = 0; + + pdata = pdev->dev.platform_data; + if (!pdata) { + dev_err(dev, "cannot find device data\n"); + return -EINVAL; + } + + keymap_data = pdata->keymap_data; + if (!keymap_data) { + dev_err(dev, "cannot find keymap data\n"); + return -EINVAL; + } + + kp = kzalloc(sizeof(struct keypad_data), GFP_KERNEL); + if (!kp) { + dev_err(dev, "cannot allocate device info\n"); + return -ENOMEM; + } + + kp->dev = dev; + kp->rows = pdata->num_row_gpios; + kp->cols = pdata->num_col_gpios; + kp->row_shift = get_count_order(kp->cols); + platform_set_drvdata(pdev, kp); + + sz = (kp->rows << kp->row_shift) * sizeof(*kp->keycodes); + kp->keycodes = kzalloc(sz, GFP_KERNEL); + if (!kp->keycodes) { + dev_err(dev, "cannot allocate keymap info\n"); + error = -ENOMEM; + goto error; + } + + 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"); + error = -ENODEV; + goto error; + } + + kp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!kp->res) { + dev_err(dev, "cannot determine register area\n"); + error = -ENODEV; + goto error; + } + + if (!request_mem_region(kp->res->start, resource_size(kp->res), + pdev->name)) { + dev_err(dev, "cannot claim register memory\n"); + kp->res = NULL; + error = -EINVAL; + goto error; + } + + kp->regs = ioremap(kp->res->start, resource_size(kp->res)); + if (!kp->regs) { + dev_err(dev, "cannot map register memory\n"); + error = -ENOMEM; + goto error; + } + + kp->clk = clk_get(dev, NULL); + if (!kp->clk) { + dev_err(dev, "cannot claim device clock\n"); + error = -EINVAL; + goto error; + } + + kp->input_dev = input_allocate_device(); + if (!kp->input_dev) { + dev_err(dev, "cannot allocate input device\n"); + error = -ENOMEM; + goto error; + } + input_set_drvdata(kp->input_dev, kp); + + kp->input_dev->name = pdev->name; + kp->input_dev->dev.parent = &pdev->dev; + kp->input_dev->open = keypad_start; + kp->input_dev->close = keypad_stop; + kp->input_dev->evbit[0] = BIT_MASK(EV_KEY); + if (!pdata->no_autorepeat) + kp->input_dev->evbit[0] |= BIT_MASK(EV_REP); + + clk_enable(kp->clk); + rev = keypad_read(kp, rev); + kp->input_dev->id.bustype = BUS_HOST; + kp->input_dev->id.product = ((rev >> 8) & 0x07); + kp->input_dev->id.version = ((rev >> 16) & 0xfff); + clk_disable(kp->clk); + + kp->input_dev->keycode = kp->keycodes; + kp->input_dev->keycodesize = sizeof(*kp->keycodes); + kp->input_dev->keycodemax = kp->rows << kp->row_shift; + + matrix_keypad_build_keymap(keymap_data, kp->row_shift, kp->keycodes, + kp->input_dev->keybit); + + input_set_capability(kp->input_dev, EV_MSC, MSC_SCAN); + + error = input_register_device(kp->input_dev); + if (error < 0) { + dev_err(dev, "Could not register input device\n"); + goto error; + } + + return 0; + +error: + if (kp->input_dev) + input_free_device(kp->input_dev); + if (kp->clk) + clk_put(kp->clk); + if (kp->regs) + iounmap(kp->regs); + if (kp->res) + release_mem_region(kp->res->start, resource_size(kp->res)); + platform_set_drvdata(pdev, NULL); + kfree(kp->keycodes); + kfree(kp); + return error; +} + +static int __devexit keypad_remove(struct platform_device *pdev) +{ + struct keypad_data *kp = platform_get_drvdata(pdev); + + input_unregister_device(kp->input_dev); + clk_put(kp->clk); + iounmap(kp->regs); + release_mem_region(kp->res->start, resource_size(kp->res)); + platform_set_drvdata(pdev, NULL); + kfree(kp->keycodes); + kfree(kp); + + return 0; +} + +static struct platform_driver keypad_driver = { + .probe = keypad_probe, + .remove = keypad_remove, + .driver.name = "tnetv107x-keypad", + .driver.owner = THIS_MODULE, +}; + +static int __init keypad_init(void) +{ + return platform_driver_register(&keypad_driver); +} + +static void __exit keypad_exit(void) +{ + platform_driver_unregister(&keypad_driver); +} + +module_init(keypad_init); +module_exit(keypad_exit); + +MODULE_AUTHOR("Cyril Chemparathy"); +MODULE_DESCRIPTION("TNETV107X Keypad Driver"); +MODULE_ALIAS("platform: tnetv107x-keypad"); +MODULE_LICENSE("GPL");