diff options
author | Eric Miao <eric.y.miao@gmail.com> | 2008-01-31 08:56:46 +0300 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-01-31 08:56:46 +0300 |
commit | 0e5f11aa80bd01d048f374cc64ef0819ad7d86f2 (patch) | |
tree | db00b9daf2f8fce61eb4bc4797c157b0a0950eed /drivers/input/keyboard/pxa27x_keypad.c | |
parent | cec69c376be132a6afdc55b8090a389eaa3cd770 (diff) | |
download | linux-0e5f11aa80bd01d048f374cc64ef0819ad7d86f2.tar.xz |
Input: pxa27x_keypad - rename the driver (was pxa27x_keyboard)
The controller should really be called keypad, and also align
the naming of functions and structures to use "pxa27x_keypad"
as prefix, instead of "pxakbd".
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/keyboard/pxa27x_keypad.c')
-rw-r--r-- | drivers/input/keyboard/pxa27x_keypad.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/drivers/input/keyboard/pxa27x_keypad.c b/drivers/input/keyboard/pxa27x_keypad.c new file mode 100644 index 000000000000..06c1d5abaa81 --- /dev/null +++ b/drivers/input/keyboard/pxa27x_keypad.c @@ -0,0 +1,274 @@ +/* + * linux/drivers/input/keyboard/pxa27x_keypad.c + * + * Driver for the pxa27x matrix keyboard controller. + * + * Created: Feb 22, 2007 + * Author: Rodolfo Giometti <giometti@linux.it> + * + * Based on a previous implementations by Kevin O'Connor + * <kevin_at_koconnor.net> and Alex Osborne <bobofdoom@gmail.com> and + * on some suggestions by Nicolas Pitre <nico@cam.org>. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/input.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/err.h> + +#include <asm/mach-types.h> +#include <asm/mach/arch.h> +#include <asm/mach/map.h> + +#include <asm/arch/hardware.h> +#include <asm/arch/pxa-regs.h> +#include <asm/arch/irqs.h> +#include <asm/arch/pxa27x_keypad.h> + +#define DRIVER_NAME "pxa27x-keypad" + +#define KPASMKP(col) (col/2 == 0 ? KPASMKP0 : \ + col/2 == 1 ? KPASMKP1 : \ + col/2 == 2 ? KPASMKP2 : KPASMKP3) +#define KPASMKPx_MKC(row, col) (1 << (row + 16 * (col % 2))) + +static struct clk *pxa27x_keypad_clk; + +static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id) +{ + struct platform_device *pdev = dev_id; + struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data; + struct input_dev *input_dev = platform_get_drvdata(pdev); + unsigned long kpc = KPC; + int p, row, col, rel; + + if (kpc & KPC_DI) { + unsigned long kpdk = KPDK; + + if (!(kpdk & KPDK_DKP)) { + /* better luck next time */ + } else if (kpc & KPC_REE0) { + unsigned long kprec = KPREC; + KPREC = 0x7f; + + if (kprec & KPREC_OF0) + rel = (kprec & 0xff) + 0x7f; + else if (kprec & KPREC_UF0) + rel = (kprec & 0xff) - 0x7f - 0xff; + else + rel = (kprec & 0xff) - 0x7f; + + if (rel) { + input_report_rel(input_dev, REL_WHEEL, rel); + input_sync(input_dev); + } + } + } + + if (kpc & KPC_MI) { + /* report the status of every button */ + for (row = 0; row < pdata->nr_rows; row++) { + for (col = 0; col < pdata->nr_cols; col++) { + p = KPASMKP(col) & KPASMKPx_MKC(row, col) ? + 1 : 0; + pr_debug("keycode %x - pressed %x\n", + pdata->keycodes[row][col], p); + input_report_key(input_dev, + pdata->keycodes[row][col], p); + } + } + input_sync(input_dev); + } + + return IRQ_HANDLED; +} + +static int pxa27x_keypad_open(struct input_dev *dev) +{ + /* Set keypad control register */ + KPC |= (KPC_ASACT | + KPC_MS_ALL | + (2 << 6) | KPC_REE0 | KPC_DK_DEB_SEL | + KPC_ME | KPC_MIE | KPC_DE | KPC_DIE); + + KPC &= ~KPC_AS; /* disable automatic scan */ + KPC &= ~KPC_IMKP; /* do not ignore multiple keypresses */ + + /* Set rotary count to mid-point value */ + KPREC = 0x7F; + + /* Enable unit clock */ + clk_enable(pxa27x_keypad_clk); + + return 0; +} + +static void pxa27x_keypad_close(struct input_dev *dev) +{ + /* Disable clock unit */ + clk_disable(pxa27x_keypad_clk); +} + +#ifdef CONFIG_PM +static int pxa27x_keypad_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data; + + /* Save controller status */ + pdata->reg_kpc = KPC; + pdata->reg_kprec = KPREC; + + return 0; +} + +static int pxa27x_keypad_resume(struct platform_device *pdev) +{ + struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data; + struct input_dev *input_dev = platform_get_drvdata(pdev); + + mutex_lock(&input_dev->mutex); + + if (input_dev->users) { + /* Restore controller status */ + KPC = pdata->reg_kpc; + KPREC = pdata->reg_kprec; + + /* Enable unit clock */ + clk_disable(pxa27x_keypad_clk); + clk_enable(pxa27x_keypad_clk); + } + + mutex_unlock(&input_dev->mutex); + + return 0; +} +#else +#define pxa27x_keypad_suspend NULL +#define pxa27x_keypad_resume NULL +#endif + +static int __devinit pxa27x_keypad_probe(struct platform_device *pdev) +{ + struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data; + struct input_dev *input_dev; + int i, row, col, error; + + pxa27x_keypad_clk = clk_get(&pdev->dev, "KBDCLK"); + if (IS_ERR(pxa27x_keypad_clk)) { + error = PTR_ERR(pxa27x_keypad_clk); + goto err_clk; + } + + /* Create and register the input driver. */ + input_dev = input_allocate_device(); + if (!input_dev) { + printk(KERN_ERR "Cannot request keypad device\n"); + error = -ENOMEM; + goto err_alloc; + } + + input_dev->name = DRIVER_NAME; + input_dev->id.bustype = BUS_HOST; + input_dev->open = pxa27x_keypad_open; + input_dev->close = pxa27x_keypad_close; + input_dev->dev.parent = &pdev->dev; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | + BIT_MASK(EV_REL); + input_dev->relbit[BIT_WORD(REL_WHEEL)] = BIT_MASK(REL_WHEEL); + for (row = 0; row < pdata->nr_rows; row++) { + for (col = 0; col < pdata->nr_cols; col++) { + int code = pdata->keycodes[row][col]; + if (code > 0) + set_bit(code, input_dev->keybit); + } + } + + error = request_irq(IRQ_KEYPAD, pxa27x_keypad_irq_handler, IRQF_DISABLED, + DRIVER_NAME, pdev); + if (error) { + printk(KERN_ERR "Cannot request keypad IRQ\n"); + goto err_free_dev; + } + + platform_set_drvdata(pdev, input_dev); + + /* Register the input device */ + error = input_register_device(input_dev); + if (error) + goto err_free_irq; + + /* Setup GPIOs. */ + for (i = 0; i < pdata->nr_rows + pdata->nr_cols; i++) + pxa_gpio_mode(pdata->gpio_modes[i]); + + /* + * Store rows/cols info into keyboard registers. + */ + + KPC |= (pdata->nr_rows - 1) << 26; + KPC |= (pdata->nr_cols - 1) << 23; + + for (col = 0; col < pdata->nr_cols; col++) + KPC |= KPC_MS0 << col; + + return 0; + + err_free_irq: + platform_set_drvdata(pdev, NULL); + free_irq(IRQ_KEYPAD, pdev); + err_free_dev: + input_free_device(input_dev); + err_alloc: + clk_put(pxa27x_keypad_clk); + err_clk: + return error; +} + +static int __devexit pxa27x_keypad_remove(struct platform_device *pdev) +{ + struct input_dev *input_dev = platform_get_drvdata(pdev); + + input_unregister_device(input_dev); + free_irq(IRQ_KEYPAD, pdev); + clk_put(pxa27x_keypad_clk); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver pxa27x_keypad_driver = { + .probe = pxa27x_keypad_probe, + .remove = __devexit_p(pxa27x_keypad_remove), + .suspend = pxa27x_keypad_suspend, + .resume = pxa27x_keypad_resume, + .driver = { + .name = DRIVER_NAME, + }, +}; + +static int __init pxa27x_keypad_init(void) +{ + return platform_driver_register(&pxa27x_keypad_driver); +} + +static void __exit pxa27x_keypad_exit(void) +{ + platform_driver_unregister(&pxa27x_keypad_driver); +} + +module_init(pxa27x_keypad_init); +module_exit(pxa27x_keypad_exit); + +MODULE_DESCRIPTION("PXA27x Keypad Controller Driver"); +MODULE_LICENSE("GPL"); |