Input: add support for PXA27x keyboard controller

Signed-off-by: Rodolfo Giometti <giometti@enneenne.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

Input: add support for PXA27x keyboard controller
Signed-off-by: Rodolfo Giometti <giometti@enneenne.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Rodolfo Giometti · Dmitry Torokhov
1 parent 867d2682e9
Showing 4 changed files with 281 additions and 0 deletions Side-by-side Diff
drivers/input/keyboard/Kconfig
drivers/input/keyboard/Makefile
drivers/input/keyboard/pxa27x_keyboard.c
include/asm-arm/arch-pxa/pxa27x_keyboard.h
@@ -203,6 +203,15 @@
 	  To compile this driver as a module, choose M here: the
 	  module will be called omap-keypad.
  
+config KEYBOARD_PXA27x
+	tristate "PXA27x keyboard support"
+	depends on PXA27x
+	help
+	  Enable support for PXA27x matrix keyboard controller
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called pxa27x_keyboard.
+
 config KEYBOARD_AAED2000
 	tristate "AAED-2000 keyboard"
 	depends on MACH_AAED2000
@@ -17,6 +17,7 @@
 obj-$(CONFIG_KEYBOARD_HIL)		+= hil_kbd.o
 obj-$(CONFIG_KEYBOARD_HIL_OLD)		+= hilkbd.o
 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
+/*
+ * linux/drivers/input/keyboard/pxa27x_keyboard.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 <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_keyboard.h>
+
+#define DRIVER_NAME		"pxa27x-keyboard"
+
+#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 irqreturn_t pxakbd_irq_handler(int irq, void *dev_id)
+{
+	struct platform_device *pdev = dev_id;
+	struct pxa27x_keyboard_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 pxakbd_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 */
+	pxa_set_cken(CKEN19_KEYPAD, 1);
+
+	return 0;
+}
+
+static void pxakbd_close(struct input_dev *dev)
+{
+	/* Disable clock unit */
+	pxa_set_cken(CKEN19_KEYPAD, 0);
+}
+
+#ifdef CONFIG_PM
+static int pxakbd_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct pxa27x_keyboard_platform_data *pdata = pdev->dev.platform_data;
+
+	/* Save controller status */
+	pdata->reg_kpc = KPC;
+	pdata->reg_kprec = KPREC;
+
+	return 0;
+}
+
+static int pxakbd_resume(struct platform_device *pdev)
+{
+	struct pxa27x_keyboard_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 */
+		pxa_set_cken(CKEN19_KEYPAD, 1);
+	}
+
+	mutex_unlock(&input_dev->mutex);
+
+	return 0;
+}
+#else
+#define pxakbd_suspend	NULL
+#define pxakbd_resume	NULL
+#endif
+
+static int __devinit pxakbd_probe(struct platform_device *pdev)
+{
+	struct pxa27x_keyboard_platform_data *pdata = pdev->dev.platform_data;
+	struct input_dev *input_dev;
+	int i, row, col, error;
+
+	/* Create and register the input driver. */
+	input_dev = input_allocate_device();
+	if (!input_dev) {
+		printk(KERN_ERR "Cannot request keypad device\n");
+		return -ENOMEM;
+	}
+
+	input_dev->name = DRIVER_NAME;
+	input_dev->id.bustype = BUS_HOST;
+	input_dev->open = pxakbd_open;
+	input_dev->close = pxakbd_close;
+	input_dev->cdev.dev = &pdev->dev;
+
+	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_REL);
+	input_dev->relbit[LONG(REL_WHEEL)] = BIT(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, pxakbd_irq_handler, SA_INTERRUPT,
+			    DRIVER_NAME, pdev);
+	if (error) {
+		printk(KERN_ERR "Cannot request keypad IRQ\n");
+		pxa_set_cken(CKEN19_KEYPAD, 0);
+		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);
+	return error;
+}
+
+static int __devexit pxakbd_remove(struct platform_device *pdev)
+{
+	struct input_dev *input_dev = platform_get_drvdata(pdev);
+
+	input_unregister_device(input_dev);
+	free_irq(IRQ_KEYPAD, pdev);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static struct platform_driver pxakbd_driver = {
+	.probe		= pxakbd_probe,
+	.remove		= __devexit_p(pxakbd_remove),
+	.suspend	= pxakbd_suspend,
+	.resume		= pxakbd_resume,
+	.driver		= {
+		.name	= DRIVER_NAME,
+	},
+};
+
+static int __init pxakbd_init(void)
+{
+	return platform_driver_register(&pxakbd_driver);
+}
+
+static void __exit pxakbd_exit(void)
+{
+	platform_driver_unregister(&pxakbd_driver);
+}
+
+module_init(pxakbd_init);
+module_exit(pxakbd_exit);
+
+MODULE_DESCRIPTION("PXA27x Matrix Keyboard Driver");
+MODULE_LICENSE("GPL");
+#define PXAKBD_MAXROW		8
+#define PXAKBD_MAXCOL		8
+
+struct pxa27x_keyboard_platform_data {
+	int nr_rows, nr_cols;
+	int keycodes[PXAKBD_MAXROW][PXAKBD_MAXCOL];
+	int gpio_modes[PXAKBD_MAXROW + PXAKBD_MAXCOL];
+
+#ifdef CONFIG_PM
+	u32 reg_kpc;
+	u32 reg_kprec;
+#endif
+};
...	...	@@ -203,6 +203,15 @@
203	203	To compile this driver as a module, choose M here: the
204	204	module will be called omap-keypad.
205	205
	206	+config KEYBOARD_PXA27x
	207	+ tristate "PXA27x keyboard support"
	208	+ depends on PXA27x
	209	+ help
	210	+ Enable support for PXA27x matrix keyboard controller
	211	+
	212	+ To compile this driver as a module, choose M here: the
	213	+ module will be called pxa27x_keyboard.
	214	+
206	215	config KEYBOARD_AAED2000
207	216	tristate "AAED-2000 keyboard"
208	217	depends on MACH_AAED2000
...	...	@@ -17,6 +17,7 @@
17	17	obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o
18	18	obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o
19	19	obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o
	20	+obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keyboard.o
20	21	obj-$(CONFIG_KEYBOARD_AAED2000) += aaed2000_kbd.o
21	22	obj-$(CONFIG_KEYBOARD_GPIO) += gpio_keys.o
	1	+/*
	2	+ * linux/drivers/input/keyboard/pxa27x_keyboard.c
	3	+ *
	4	+ * Driver for the pxa27x matrix keyboard controller.
	5	+ *
	6	+ * Created: Feb 22, 2007
	7	+ * Author: Rodolfo Giometti <giometti@linux.it>
	8	+ *
	9	+ * Based on a previous implementations by Kevin O'Connor
	10	+ * <kevin_at_koconnor.net> and Alex Osborne <bobofdoom@gmail.com> and
	11	+ * on some suggestions by Nicolas Pitre <nico@cam.org>.
	12	+ *
	13	+ * This program is free software; you can redistribute it and/or modify
	14	+ * it under the terms of the GNU General Public License version 2 as
	15	+ * published by the Free Software Foundation.
	16	+ */
	17	+
	18	+
	19	+#include <linux/kernel.h>
	20	+#include <linux/module.h>
	21	+#include <linux/init.h>
	22	+#include <linux/interrupt.h>
	23	+#include <linux/input.h>
	24	+#include <linux/device.h>
	25	+#include <linux/platform_device.h>
	26	+
	27	+#include <asm/mach-types.h>
	28	+#include <asm/mach/arch.h>
	29	+#include <asm/mach/map.h>
	30	+
	31	+#include <asm/arch/hardware.h>
	32	+#include <asm/arch/pxa-regs.h>
	33	+#include <asm/arch/irqs.h>
	34	+#include <asm/arch/pxa27x_keyboard.h>
	35	+
	36	+#define DRIVER_NAME "pxa27x-keyboard"
	37	+
	38	+#define KPASMKP(col) (col/2 == 0 ? KPASMKP0 : \
	39	+ col/2 == 1 ? KPASMKP1 : \
	40	+ col/2 == 2 ? KPASMKP2 : KPASMKP3)
	41	+#define KPASMKPx_MKC(row, col) (1 << (row + 16 * (col % 2)))
	42	+
	43	+static irqreturn_t pxakbd_irq_handler(int irq, void *dev_id)
	44	+{
	45	+ struct platform_device *pdev = dev_id;
	46	+ struct pxa27x_keyboard_platform_data *pdata = pdev->dev.platform_data;
	47	+ struct input_dev *input_dev = platform_get_drvdata(pdev);
	48	+ unsigned long kpc = KPC;
	49	+ int p, row, col, rel;
	50	+
	51	+ if (kpc & KPC_DI) {
	52	+ unsigned long kpdk = KPDK;
	53	+
	54	+ if (!(kpdk & KPDK_DKP)) {
	55	+ /* better luck next time */
	56	+ } else if (kpc & KPC_REE0) {
	57	+ unsigned long kprec = KPREC;
	58	+ KPREC = 0x7f;
	59	+
	60	+ if (kprec & KPREC_OF0)
	61	+ rel = (kprec & 0xff) + 0x7f;
	62	+ else if (kprec & KPREC_UF0)
	63	+ rel = (kprec & 0xff) - 0x7f - 0xff;
	64	+ else
	65	+ rel = (kprec & 0xff) - 0x7f;
	66	+
	67	+ if (rel) {
	68	+ input_report_rel(input_dev, REL_WHEEL, rel);
	69	+ input_sync(input_dev);
	70	+ }
	71	+ }
	72	+ }
	73	+
	74	+ if (kpc & KPC_MI) {
	75	+ /* report the status of every button */
	76	+ for (row = 0; row < pdata->nr_rows; row++) {
	77	+ for (col = 0; col < pdata->nr_cols; col++) {
	78	+ p = KPASMKP(col) & KPASMKPx_MKC(row, col) ?
	79	+ 1 : 0;
	80	+ pr_debug("keycode %x - pressed %x\n",
	81	+ pdata->keycodes[row][col], p);
	82	+ input_report_key(input_dev,
	83	+ pdata->keycodes[row][col], p);
	84	+ }
	85	+ }
	86	+ input_sync(input_dev);
	87	+ }
	88	+
	89	+ return IRQ_HANDLED;
	90	+}
	91	+
	92	+static int pxakbd_open(struct input_dev *dev)
	93	+{
	94	+ /* Set keypad control register */
	95	+ KPC \|= (KPC_ASACT \|
	96	+ KPC_MS_ALL \|
	97	+ (2 << 6) \| KPC_REE0 \| KPC_DK_DEB_SEL \|
	98	+ KPC_ME \| KPC_MIE \| KPC_DE \| KPC_DIE);
	99	+
	100	+ KPC &= ~KPC_AS; /* disable automatic scan */
	101	+ KPC &= ~KPC_IMKP; /* do not ignore multiple keypresses */
	102	+
	103	+ /* Set rotary count to mid-point value */
	104	+ KPREC = 0x7F;
	105	+
	106	+ /* Enable unit clock */
	107	+ pxa_set_cken(CKEN19_KEYPAD, 1);
	108	+
	109	+ return 0;
	110	+}
	111	+
	112	+static void pxakbd_close(struct input_dev *dev)
	113	+{
	114	+ /* Disable clock unit */
	115	+ pxa_set_cken(CKEN19_KEYPAD, 0);
	116	+}
	117	+
	118	+#ifdef CONFIG_PM
	119	+static int pxakbd_suspend(struct platform_device *pdev, pm_message_t state)
	120	+{
	121	+ struct pxa27x_keyboard_platform_data *pdata = pdev->dev.platform_data;
	122	+
	123	+ /* Save controller status */
	124	+ pdata->reg_kpc = KPC;
	125	+ pdata->reg_kprec = KPREC;
	126	+
	127	+ return 0;
	128	+}
	129	+
	130	+static int pxakbd_resume(struct platform_device *pdev)
	131	+{
	132	+ struct pxa27x_keyboard_platform_data *pdata = pdev->dev.platform_data;
	133	+ struct input_dev *input_dev = platform_get_drvdata(pdev);
	134	+
	135	+ mutex_lock(&input_dev->mutex);
	136	+
	137	+ if (input_dev->users) {
	138	+ /* Restore controller status */
	139	+ KPC = pdata->reg_kpc;
	140	+ KPREC = pdata->reg_kprec;
	141	+
	142	+ /* Enable unit clock */
	143	+ pxa_set_cken(CKEN19_KEYPAD, 1);
	144	+ }
	145	+
	146	+ mutex_unlock(&input_dev->mutex);
	147	+
	148	+ return 0;
	149	+}
	150	+#else
	151	+#define pxakbd_suspend NULL
	152	+#define pxakbd_resume NULL
	153	+#endif
	154	+
	155	+static int __devinit pxakbd_probe(struct platform_device *pdev)
	156	+{
	157	+ struct pxa27x_keyboard_platform_data *pdata = pdev->dev.platform_data;
	158	+ struct input_dev *input_dev;
	159	+ int i, row, col, error;
	160	+
	161	+ /* Create and register the input driver. */
	162	+ input_dev = input_allocate_device();
	163	+ if (!input_dev) {
	164	+ printk(KERN_ERR "Cannot request keypad device\n");
	165	+ return -ENOMEM;
	166	+ }
	167	+
	168	+ input_dev->name = DRIVER_NAME;
	169	+ input_dev->id.bustype = BUS_HOST;
	170	+ input_dev->open = pxakbd_open;
	171	+ input_dev->close = pxakbd_close;
	172	+ input_dev->cdev.dev = &pdev->dev;
	173	+
	174	+ input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_REP) \| BIT(EV_REL);
	175	+ input_dev->relbit[LONG(REL_WHEEL)] = BIT(REL_WHEEL);
	176	+ for (row = 0; row < pdata->nr_rows; row++) {
	177	+ for (col = 0; col < pdata->nr_cols; col++) {
	178	+ int code = pdata->keycodes[row][col];
	179	+ if (code > 0)
	180	+ set_bit(code, input_dev->keybit);
	181	+ }
	182	+ }
	183	+
	184	+ error = request_irq(IRQ_KEYPAD, pxakbd_irq_handler, SA_INTERRUPT,
	185	+ DRIVER_NAME, pdev);
	186	+ if (error) {
	187	+ printk(KERN_ERR "Cannot request keypad IRQ\n");
	188	+ pxa_set_cken(CKEN19_KEYPAD, 0);
	189	+ goto err_free_dev;
	190	+ }
	191	+
	192	+ platform_set_drvdata(pdev, input_dev);
	193	+
	194	+ /* Register the input device */
	195	+ error = input_register_device(input_dev);
	196	+ if (error)
	197	+ goto err_free_irq;
	198	+
	199	+ /* Setup GPIOs. */
	200	+ for (i = 0; i < pdata->nr_rows + pdata->nr_cols; i++)
	201	+ pxa_gpio_mode(pdata->gpio_modes[i]);
	202	+
	203	+ /*
	204	+ * Store rows/cols info into keyboard registers.
	205	+ */
	206	+
	207	+ KPC \|= (pdata->nr_rows - 1) << 26;
	208	+ KPC \|= (pdata->nr_cols - 1) << 23;
	209	+
	210	+ for (col = 0; col < pdata->nr_cols; col++)
	211	+ KPC \|= KPC_MS0 << col;
	212	+
	213	+ return 0;
	214	+
	215	+ err_free_irq:
	216	+ platform_set_drvdata(pdev, NULL);
	217	+ free_irq(IRQ_KEYPAD, pdev);
	218	+ err_free_dev:
	219	+ input_free_device(input_dev);
	220	+ return error;
	221	+}
	222	+
	223	+static int __devexit pxakbd_remove(struct platform_device *pdev)
	224	+{
	225	+ struct input_dev *input_dev = platform_get_drvdata(pdev);
	226	+
	227	+ input_unregister_device(input_dev);
	228	+ free_irq(IRQ_KEYPAD, pdev);
	229	+ platform_set_drvdata(pdev, NULL);
	230	+
	231	+ return 0;
	232	+}
	233	+
	234	+static struct platform_driver pxakbd_driver = {
	235	+ .probe = pxakbd_probe,
	236	+ .remove = __devexit_p(pxakbd_remove),
	237	+ .suspend = pxakbd_suspend,
	238	+ .resume = pxakbd_resume,
	239	+ .driver = {
	240	+ .name = DRIVER_NAME,
	241	+ },
	242	+};
	243	+
	244	+static int __init pxakbd_init(void)
	245	+{
	246	+ return platform_driver_register(&pxakbd_driver);
	247	+}
	248	+
	249	+static void __exit pxakbd_exit(void)
	250	+{
	251	+ platform_driver_unregister(&pxakbd_driver);
	252	+}
	253	+
	254	+module_init(pxakbd_init);
	255	+module_exit(pxakbd_exit);
	256	+
	257	+MODULE_DESCRIPTION("PXA27x Matrix Keyboard Driver");
	258	+MODULE_LICENSE("GPL");
	1	+#define PXAKBD_MAXROW 8
	2	+#define PXAKBD_MAXCOL 8
	3	+
	4	+struct pxa27x_keyboard_platform_data {
	5	+ int nr_rows, nr_cols;
	6	+ int keycodes[PXAKBD_MAXROW][PXAKBD_MAXCOL];
	7	+ int gpio_modes[PXAKBD_MAXROW + PXAKBD_MAXCOL];
	8	+
	9	+#ifdef CONFIG_PM
	10	+ u32 reg_kpc;
	11	+ u32 reg_kprec;
	12	+#endif
	13	+};