diff options
| -rw-r--r-- | arch/arm/plat-spear/include/plat/keyboard.h | 141 | ||||
| -rw-r--r-- | drivers/input/keyboard/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/input/keyboard/Makefile | 1 | ||||
| -rw-r--r-- | drivers/input/keyboard/spear-keyboard.c | 344 |
4 files changed, 495 insertions, 0 deletions
diff --git a/arch/arm/plat-spear/include/plat/keyboard.h b/arch/arm/plat-spear/include/plat/keyboard.h new file mode 100644 index 000000000000..68b5394fc583 --- /dev/null +++ b/arch/arm/plat-spear/include/plat/keyboard.h @@ -0,0 +1,141 @@ +/* + * Copyright (C) 2010 ST Microelectronics + * Rajeev Kumar<rajeev-dlh.kumar@st.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __PLAT_KEYBOARD_H +#define __PLAT_KEYBOARD_H + +#include <linux/bitops.h> +#include <linux/input.h> +#include <linux/input/matrix_keypad.h> +#include <linux/types.h> + +#define DECLARE_KEYMAP(_name) \ +int _name[] = { \ + KEY(0, 0, KEY_ESC), \ + KEY(0, 1, KEY_1), \ + KEY(0, 2, KEY_2), \ + KEY(0, 3, KEY_3), \ + KEY(0, 4, KEY_4), \ + KEY(0, 5, KEY_5), \ + KEY(0, 6, KEY_6), \ + KEY(0, 7, KEY_7), \ + KEY(0, 8, KEY_8), \ + KEY(1, 0, KEY_9), \ + KEY(1, 1, KEY_MINUS), \ + KEY(1, 2, KEY_EQUAL), \ + KEY(1, 3, KEY_BACKSPACE), \ + KEY(1, 4, KEY_TAB), \ + KEY(1, 5, KEY_Q), \ + KEY(1, 6, KEY_W), \ + KEY(1, 7, KEY_E), \ + KEY(1, 8, KEY_R), \ + KEY(2, 0, KEY_T), \ + KEY(2, 1, KEY_Y), \ + KEY(2, 2, KEY_U), \ + KEY(2, 3, KEY_I), \ + KEY(2, 4, KEY_O), \ + KEY(2, 5, KEY_P), \ + KEY(2, 6, KEY_LEFTBRACE), \ + KEY(2, 7, KEY_RIGHTBRACE), \ + KEY(2, 8, KEY_ENTER), \ + KEY(3, 0, KEY_LEFTCTRL), \ + KEY(3, 1, KEY_A), \ + KEY(3, 2, KEY_S), \ + KEY(3, 3, KEY_D), \ + KEY(3, 4, KEY_F), \ + KEY(3, 5, KEY_G), \ + KEY(3, 6, KEY_H), \ + KEY(3, 7, KEY_J), \ + KEY(3, 8, KEY_K), \ + KEY(4, 0, KEY_L), \ + KEY(4, 1, KEY_SEMICOLON), \ + KEY(4, 2, KEY_APOSTROPHE), \ + KEY(4, 3, KEY_GRAVE), \ + KEY(4, 4, KEY_LEFTSHIFT), \ + KEY(4, 5, KEY_BACKSLASH), \ + KEY(4, 6, KEY_Z), \ + KEY(4, 7, KEY_X), \ + KEY(4, 8, KEY_C), \ + KEY(4, 0, KEY_L), \ + KEY(4, 1, KEY_SEMICOLON), \ + KEY(4, 2, KEY_APOSTROPHE), \ + KEY(4, 3, KEY_GRAVE), \ + KEY(4, 4, KEY_LEFTSHIFT), \ + KEY(4, 5, KEY_BACKSLASH), \ + KEY(4, 6, KEY_Z), \ + KEY(4, 7, KEY_X), \ + KEY(4, 8, KEY_C), \ + KEY(4, 0, KEY_L), \ + KEY(4, 1, KEY_SEMICOLON), \ + KEY(4, 2, KEY_APOSTROPHE), \ + KEY(4, 3, KEY_GRAVE), \ + KEY(4, 4, KEY_LEFTSHIFT), \ + KEY(4, 5, KEY_BACKSLASH), \ + KEY(4, 6, KEY_Z), \ + KEY(4, 7, KEY_X), \ + KEY(4, 8, KEY_C), \ + KEY(5, 0, KEY_V), \ + KEY(5, 1, KEY_B), \ + KEY(5, 2, KEY_N), \ + KEY(5, 3, KEY_M), \ + KEY(5, 4, KEY_COMMA), \ + KEY(5, 5, KEY_DOT), \ + KEY(5, 6, KEY_SLASH), \ + KEY(5, 7, KEY_RIGHTSHIFT), \ + KEY(5, 8, KEY_KPASTERISK), \ + KEY(6, 0, KEY_LEFTALT), \ + KEY(6, 1, KEY_SPACE), \ + KEY(6, 2, KEY_CAPSLOCK), \ + KEY(6, 3, KEY_F1), \ + KEY(6, 4, KEY_F2), \ + KEY(6, 5, KEY_F3), \ + KEY(6, 6, KEY_F4), \ + KEY(6, 7, KEY_F5), \ + KEY(6, 8, KEY_F6), \ + KEY(7, 0, KEY_F7), \ + KEY(7, 1, KEY_F8), \ + KEY(7, 2, KEY_F9), \ + KEY(7, 3, KEY_F10), \ + KEY(7, 4, KEY_NUMLOCK), \ + KEY(7, 5, KEY_SCROLLLOCK), \ + KEY(7, 6, KEY_KP7), \ + KEY(7, 7, KEY_KP8), \ + KEY(7, 8, KEY_KP9), \ + KEY(8, 0, KEY_KPMINUS), \ + KEY(8, 1, KEY_KP4), \ + KEY(8, 2, KEY_KP5), \ + KEY(8, 3, KEY_KP6), \ + KEY(8, 4, KEY_KPPLUS), \ + KEY(8, 5, KEY_KP1), \ + KEY(8, 6, KEY_KP2), \ + KEY(8, 7, KEY_KP3), \ + KEY(8, 8, KEY_KP0), \ +} + +/** + * struct kbd_platform_data - spear keyboard platform data + * keymap: pointer to keymap data (table and size) + * rep: enables key autorepeat + * + * This structure is supposed to be used by platform code to supply + * keymaps to drivers that implement keyboards. + */ +struct kbd_platform_data { + const struct matrix_keymap_data *keymap; + bool rep; +}; + +/* This function is used to set platform data field of pdev->dev */ +static inline void +kbd_set_plat_data(struct platform_device *pdev, struct kbd_platform_data *data) +{ + pdev->dev.platform_data = data; +} + +#endif /* __PLAT_KEYBOARD_H */ diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index b8c51b9781db..ee85e5bf4b2a 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -443,6 +443,15 @@ config KEYBOARD_OMAP4 To compile this driver as a module, choose M here: the module will be called omap4-keypad. +config KEYBOARD_SPEAR + tristate "ST SPEAR keyboard support" + depends on PLAT_SPEAR + help + Say Y here if you want to use the SPEAR keyboard. + + To compile this driver as a module, choose M here: the + module will be called spear-keboard. + config KEYBOARD_TNETV107X tristate "TI TNETV107X keypad support" depends on ARCH_DAVINCI_TNETV107X diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index a34452e8ebe2..8449c730892c 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -37,6 +37,7 @@ obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o +obj-$(CONFIG_KEYBOARD_SPEAR) += spear-keyboard.o obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o diff --git a/drivers/input/keyboard/spear-keyboard.c b/drivers/input/keyboard/spear-keyboard.c new file mode 100644 index 000000000000..bee03d64c453 --- /dev/null +++ b/drivers/input/keyboard/spear-keyboard.c @@ -0,0 +1,344 @@ +/* + * SPEAr Keyboard Driver + * Based on omap-keypad driver + * + * Copyright (C) 2010 ST Microelectronics + * Rajeev Kumar<rajeev-dlh.kumar@st.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/clk.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/input.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_wakeup.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <plat/keyboard.h> + +/* Keyboard Registers */ +#define MODE_REG 0x00 /* 16 bit reg */ +#define STATUS_REG 0x0C /* 2 bit reg */ +#define DATA_REG 0x10 /* 8 bit reg */ +#define INTR_MASK 0x54 + +/* Register Values */ +/* + * pclk freq mask = (APB FEQ -1)= 82 MHZ.Programme bit 15-9 in mode + * control register as 1010010(82MHZ) + */ +#define PCLK_FREQ_MSK 0xA400 /* 82 MHz */ +#define START_SCAN 0x0100 +#define SCAN_RATE_10 0x0000 +#define SCAN_RATE_20 0x0004 +#define SCAN_RATE_40 0x0008 +#define SCAN_RATE_80 0x000C +#define MODE_KEYBOARD 0x0002 +#define DATA_AVAIL 0x2 + +#define KEY_MASK 0xFF000000 +#define KEY_VALUE 0x00FFFFFF +#define ROW_MASK 0xF0 +#define COLUMN_MASK 0x0F +#define ROW_SHIFT 4 + +struct spear_kbd { + struct input_dev *input; + struct resource *res; + void __iomem *io_base; + struct clk *clk; + unsigned int irq; + unsigned short last_key; + unsigned short keycodes[256]; +}; + +static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id) +{ + struct spear_kbd *kbd = dev_id; + struct input_dev *input = kbd->input; + unsigned int key; + u8 sts, val; + + sts = readb(kbd->io_base + STATUS_REG); + if (sts & DATA_AVAIL) + return IRQ_NONE; + + if (kbd->last_key != KEY_RESERVED) { + input_report_key(input, kbd->last_key, 0); + kbd->last_key = KEY_RESERVED; + } + + /* following reads active (row, col) pair */ + val = readb(kbd->io_base + DATA_REG); + key = kbd->keycodes[val]; + + input_event(input, EV_MSC, MSC_SCAN, val); + input_report_key(input, key, 1); + input_sync(input); + + kbd->last_key = key; + + /* clear interrupt */ + writeb(0, kbd->io_base + STATUS_REG); + + return IRQ_HANDLED; +} + +static int spear_kbd_open(struct input_dev *dev) +{ + struct spear_kbd *kbd = input_get_drvdata(dev); + int error; + u16 val; + + kbd->last_key = KEY_RESERVED; + + error = clk_enable(kbd->clk); + if (error) + return error; + + /* program keyboard */ + val = SCAN_RATE_80 | MODE_KEYBOARD | PCLK_FREQ_MSK; + writew(val, kbd->io_base + MODE_REG); + writeb(1, kbd->io_base + STATUS_REG); + + /* start key scan */ + val = readw(kbd->io_base + MODE_REG); + val |= START_SCAN; + writew(val, kbd->io_base + MODE_REG); + + return 0; +} + +static void spear_kbd_close(struct input_dev *dev) +{ + struct spear_kbd *kbd = input_get_drvdata(dev); + u16 val; + + /* stop key scan */ + val = readw(kbd->io_base + MODE_REG); + val &= ~START_SCAN; + writew(val, kbd->io_base + MODE_REG); + + clk_disable(kbd->clk); + + kbd->last_key = KEY_RESERVED; +} + +static int __devinit spear_kbd_probe(struct platform_device *pdev) +{ + const struct kbd_platform_data *pdata = pdev->dev.platform_data; + const struct matrix_keymap_data *keymap; + struct spear_kbd *kbd; + struct input_dev *input_dev; + struct resource *res; + int irq; + int error; + + if (!pdata) { + dev_err(&pdev->dev, "Invalid platform data\n"); + return -EINVAL; + } + + keymap = pdata->keymap; + if (!keymap) { + dev_err(&pdev->dev, "no keymap defined\n"); + return -EINVAL; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "no keyboard resource defined\n"); + return -EBUSY; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "not able to get irq for the device\n"); + return irq; + } + + kbd = kzalloc(sizeof(*kbd), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!kbd || !input_dev) { + dev_err(&pdev->dev, "out of memory\n"); + error = -ENOMEM; + goto err_free_mem; + } + + kbd->input = input_dev; + kbd->irq = irq; + kbd->res = request_mem_region(res->start, resource_size(res), + pdev->name); + if (!kbd->res) { + dev_err(&pdev->dev, "keyboard region already claimed\n"); + error = -EBUSY; + goto err_free_mem; + } + + kbd->io_base = ioremap(res->start, resource_size(res)); + if (!kbd->io_base) { + dev_err(&pdev->dev, "ioremap failed for kbd_region\n"); + error = -ENOMEM; + goto err_release_mem_region; + } + + kbd->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(kbd->clk)) { + error = PTR_ERR(kbd->clk); + goto err_iounmap; + } + + input_dev->name = "Spear Keyboard"; + input_dev->phys = "keyboard/input0"; + input_dev->dev.parent = &pdev->dev; + input_dev->id.bustype = BUS_HOST; + input_dev->id.vendor = 0x0001; + input_dev->id.product = 0x0001; + input_dev->id.version = 0x0100; + input_dev->open = spear_kbd_open; + input_dev->close = spear_kbd_close; + + __set_bit(EV_KEY, input_dev->evbit); + if (pdata->rep) + __set_bit(EV_REP, input_dev->evbit); + input_set_capability(input_dev, EV_MSC, MSC_SCAN); + + input_dev->keycode = kbd->keycodes; + input_dev->keycodesize = sizeof(kbd->keycodes[0]); + input_dev->keycodemax = ARRAY_SIZE(kbd->keycodes); + + matrix_keypad_build_keymap(keymap, ROW_SHIFT, + input_dev->keycode, input_dev->keybit); + + input_set_drvdata(input_dev, kbd); + + error = request_irq(irq, spear_kbd_interrupt, 0, "keyboard", kbd); + if (error) { + dev_err(&pdev->dev, "request_irq fail\n"); + goto err_put_clk; + } + + error = input_register_device(input_dev); + if (error) { + dev_err(&pdev->dev, "Unable to register keyboard device\n"); + goto err_free_irq; + } + + device_init_wakeup(&pdev->dev, 1); + platform_set_drvdata(pdev, kbd); + + return 0; + +err_free_irq: + free_irq(kbd->irq, kbd); +err_put_clk: + clk_put(kbd->clk); +err_iounmap: + iounmap(kbd->io_base); +err_release_mem_region: + release_mem_region(res->start, resource_size(res)); +err_free_mem: + input_free_device(input_dev); + kfree(kbd); + + return error; +} + +static int __devexit spear_kbd_remove(struct platform_device *pdev) +{ + struct spear_kbd *kbd = platform_get_drvdata(pdev); + + free_irq(kbd->irq, kbd); + input_unregister_device(kbd->input); + clk_put(kbd->clk); + iounmap(kbd->io_base); + release_mem_region(kbd->res->start, resource_size(kbd->res)); + kfree(kbd); + + device_init_wakeup(&pdev->dev, 1); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM +static int spear_kbd_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct spear_kbd *kbd = platform_get_drvdata(pdev); + struct input_dev *input_dev = kbd->input; + + mutex_lock(&input_dev->mutex); + + if (input_dev->users) + clk_enable(kbd->clk); + + if (device_may_wakeup(&pdev->dev)) + enable_irq_wake(kbd->irq); + + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static int spear_kbd_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct spear_kbd *kbd = platform_get_drvdata(pdev); + struct input_dev *input_dev = kbd->input; + + mutex_lock(&input_dev->mutex); + + if (device_may_wakeup(&pdev->dev)) + disable_irq_wake(kbd->irq); + + if (input_dev->users) + clk_enable(kbd->clk); + + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static const struct dev_pm_ops spear_kbd_pm_ops = { + .suspend = spear_kbd_suspend, + .resume = spear_kbd_resume, +}; +#endif + +static struct platform_driver spear_kbd_driver = { + .probe = spear_kbd_probe, + .remove = __devexit_p(spear_kbd_remove), + .driver = { + .name = "keyboard", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &spear_kbd_pm_ops, +#endif + }, +}; + +static int __init spear_kbd_init(void) +{ + return platform_driver_register(&spear_kbd_driver); +} +module_init(spear_kbd_init); + +static void __exit spear_kbd_exit(void) +{ + platform_driver_unregister(&spear_kbd_driver); +} +module_exit(spear_kbd_exit); + +MODULE_AUTHOR("Rajeev Kumar"); +MODULE_DESCRIPTION("SPEAr Keyboard Driver"); +MODULE_LICENSE("GPL"); |
