kernel-fxtec-pro1x/drivers/input/keyboard/pxa27x_keypad.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

612 lines
16 KiB
C

/*
* 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@fluxnic.net>.
*
* 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 <linux/input/matrix_keypad.h>
#include <linux/slab.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <mach/hardware.h>
#include <mach/pxa27x_keypad.h>
/*
* Keypad Controller registers
*/
#define KPC 0x0000 /* Keypad Control register */
#define KPDK 0x0008 /* Keypad Direct Key register */
#define KPREC 0x0010 /* Keypad Rotary Encoder register */
#define KPMK 0x0018 /* Keypad Matrix Key register */
#define KPAS 0x0020 /* Keypad Automatic Scan register */
/* Keypad Automatic Scan Multiple Key Presser register 0-3 */
#define KPASMKP0 0x0028
#define KPASMKP1 0x0030
#define KPASMKP2 0x0038
#define KPASMKP3 0x0040
#define KPKDI 0x0048
/* bit definitions */
#define KPC_MKRN(n) ((((n) - 1) & 0x7) << 26) /* matrix key row number */
#define KPC_MKCN(n) ((((n) - 1) & 0x7) << 23) /* matrix key column number */
#define KPC_DKN(n) ((((n) - 1) & 0x7) << 6) /* direct key number */
#define KPC_AS (0x1 << 30) /* Automatic Scan bit */
#define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */
#define KPC_MI (0x1 << 22) /* Matrix interrupt bit */
#define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */
#define KPC_MS(n) (0x1 << (13 + (n))) /* Matrix scan line 'n' */
#define KPC_MS_ALL (0xff << 13)
#define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */
#define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */
#define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */
#define KPC_DI (0x1 << 5) /* Direct key interrupt bit */
#define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */
#define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */
#define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */
#define KPC_DE (0x1 << 1) /* Direct Keypad Enable */
#define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */
#define KPDK_DKP (0x1 << 31)
#define KPDK_DK(n) ((n) & 0xff)
#define KPREC_OF1 (0x1 << 31)
#define kPREC_UF1 (0x1 << 30)
#define KPREC_OF0 (0x1 << 15)
#define KPREC_UF0 (0x1 << 14)
#define KPREC_RECOUNT0(n) ((n) & 0xff)
#define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff)
#define KPMK_MKP (0x1 << 31)
#define KPAS_SO (0x1 << 31)
#define KPASMKPx_SO (0x1 << 31)
#define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
#define KPAS_RP(n) (((n) >> 4) & 0xf)
#define KPAS_CP(n) ((n) & 0xf)
#define KPASMKP_MKC_MASK (0xff)
#define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
#define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off))
#define MAX_MATRIX_KEY_NUM (MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS)
#define MAX_KEYPAD_KEYS (MAX_MATRIX_KEY_NUM + MAX_DIRECT_KEY_NUM)
struct pxa27x_keypad {
struct pxa27x_keypad_platform_data *pdata;
struct clk *clk;
struct input_dev *input_dev;
void __iomem *mmio_base;
int irq;
unsigned short keycodes[MAX_KEYPAD_KEYS];
int rotary_rel_code[2];
/* state row bits of each column scan */
uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS];
uint32_t direct_key_state;
unsigned int direct_key_mask;
};
static void pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad)
{
struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
struct input_dev *input_dev = keypad->input_dev;
unsigned short keycode;
int i;
for (i = 0; i < pdata->matrix_key_map_size; i++) {
unsigned int key = pdata->matrix_key_map[i];
unsigned int row = KEY_ROW(key);
unsigned int col = KEY_COL(key);
unsigned int scancode = MATRIX_SCAN_CODE(row, col,
MATRIX_ROW_SHIFT);
keycode = KEY_VAL(key);
keypad->keycodes[scancode] = keycode;
__set_bit(keycode, input_dev->keybit);
}
for (i = 0; i < pdata->direct_key_num; i++) {
keycode = pdata->direct_key_map[i];
keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = keycode;
__set_bit(keycode, input_dev->keybit);
}
if (pdata->enable_rotary0) {
if (pdata->rotary0_up_key && pdata->rotary0_down_key) {
keycode = pdata->rotary0_up_key;
keypad->keycodes[MAX_MATRIX_KEY_NUM + 0] = keycode;
__set_bit(keycode, input_dev->keybit);
keycode = pdata->rotary0_down_key;
keypad->keycodes[MAX_MATRIX_KEY_NUM + 1] = keycode;
__set_bit(keycode, input_dev->keybit);
keypad->rotary_rel_code[0] = -1;
} else {
keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
__set_bit(pdata->rotary0_rel_code, input_dev->relbit);
}
}
if (pdata->enable_rotary1) {
if (pdata->rotary1_up_key && pdata->rotary1_down_key) {
keycode = pdata->rotary1_up_key;
keypad->keycodes[MAX_MATRIX_KEY_NUM + 2] = keycode;
__set_bit(keycode, input_dev->keybit);
keycode = pdata->rotary1_down_key;
keypad->keycodes[MAX_MATRIX_KEY_NUM + 3] = keycode;
__set_bit(keycode, input_dev->keybit);
keypad->rotary_rel_code[1] = -1;
} else {
keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
__set_bit(pdata->rotary1_rel_code, input_dev->relbit);
}
}
__clear_bit(KEY_RESERVED, input_dev->keybit);
}
static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
{
struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
struct input_dev *input_dev = keypad->input_dev;
int row, col, num_keys_pressed = 0;
uint32_t new_state[MAX_MATRIX_KEY_COLS];
uint32_t kpas = keypad_readl(KPAS);
num_keys_pressed = KPAS_MUKP(kpas);
memset(new_state, 0, sizeof(new_state));
if (num_keys_pressed == 0)
goto scan;
if (num_keys_pressed == 1) {
col = KPAS_CP(kpas);
row = KPAS_RP(kpas);
/* if invalid row/col, treat as no key pressed */
if (col >= pdata->matrix_key_cols ||
row >= pdata->matrix_key_rows)
goto scan;
new_state[col] = (1 << row);
goto scan;
}
if (num_keys_pressed > 1) {
uint32_t kpasmkp0 = keypad_readl(KPASMKP0);
uint32_t kpasmkp1 = keypad_readl(KPASMKP1);
uint32_t kpasmkp2 = keypad_readl(KPASMKP2);
uint32_t kpasmkp3 = keypad_readl(KPASMKP3);
new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK;
new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK;
new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK;
new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK;
new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK;
new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK;
new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK;
new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK;
}
scan:
for (col = 0; col < pdata->matrix_key_cols; col++) {
uint32_t bits_changed;
int code;
bits_changed = keypad->matrix_key_state[col] ^ new_state[col];
if (bits_changed == 0)
continue;
for (row = 0; row < pdata->matrix_key_rows; row++) {
if ((bits_changed & (1 << row)) == 0)
continue;
code = MATRIX_SCAN_CODE(row, col, MATRIX_ROW_SHIFT);
input_event(input_dev, EV_MSC, MSC_SCAN, code);
input_report_key(input_dev, keypad->keycodes[code],
new_state[col] & (1 << row));
}
}
input_sync(input_dev);
memcpy(keypad->matrix_key_state, new_state, sizeof(new_state));
}
#define DEFAULT_KPREC (0x007f007f)
static inline int rotary_delta(uint32_t kprec)
{
if (kprec & KPREC_OF0)
return (kprec & 0xff) + 0x7f;
else if (kprec & KPREC_UF0)
return (kprec & 0xff) - 0x7f - 0xff;
else
return (kprec & 0xff) - 0x7f;
}
static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta)
{
struct input_dev *dev = keypad->input_dev;
if (delta == 0)
return;
if (keypad->rotary_rel_code[r] == -1) {
int code = MAX_MATRIX_KEY_NUM + 2 * r + (delta > 0 ? 0 : 1);
unsigned char keycode = keypad->keycodes[code];
/* simulate a press-n-release */
input_event(dev, EV_MSC, MSC_SCAN, code);
input_report_key(dev, keycode, 1);
input_sync(dev);
input_event(dev, EV_MSC, MSC_SCAN, code);
input_report_key(dev, keycode, 0);
input_sync(dev);
} else {
input_report_rel(dev, keypad->rotary_rel_code[r], delta);
input_sync(dev);
}
}
static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
{
struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
uint32_t kprec;
/* read and reset to default count value */
kprec = keypad_readl(KPREC);
keypad_writel(KPREC, DEFAULT_KPREC);
if (pdata->enable_rotary0)
report_rotary_event(keypad, 0, rotary_delta(kprec));
if (pdata->enable_rotary1)
report_rotary_event(keypad, 1, rotary_delta(kprec >> 16));
}
static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
{
struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
struct input_dev *input_dev = keypad->input_dev;
unsigned int new_state;
uint32_t kpdk, bits_changed;
int i;
kpdk = keypad_readl(KPDK);
if (pdata->enable_rotary0 || pdata->enable_rotary1)
pxa27x_keypad_scan_rotary(keypad);
new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
bits_changed = keypad->direct_key_state ^ new_state;
if (bits_changed == 0)
return;
for (i = 0; i < pdata->direct_key_num; i++) {
if (bits_changed & (1 << i)) {
int code = MAX_MATRIX_KEY_NUM + i;
input_event(input_dev, EV_MSC, MSC_SCAN, code);
input_report_key(input_dev, keypad->keycodes[code],
new_state & (1 << i));
}
}
input_sync(input_dev);
keypad->direct_key_state = new_state;
}
static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
{
struct pxa27x_keypad *keypad = dev_id;
unsigned long kpc = keypad_readl(KPC);
if (kpc & KPC_DI)
pxa27x_keypad_scan_direct(keypad);
if (kpc & KPC_MI)
pxa27x_keypad_scan_matrix(keypad);
return IRQ_HANDLED;
}
static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
{
struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
unsigned int mask = 0, direct_key_num = 0;
unsigned long kpc = 0;
/* enable matrix keys with automatic scan */
if (pdata->matrix_key_rows && pdata->matrix_key_cols) {
kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL;
kpc |= KPC_MKRN(pdata->matrix_key_rows) |
KPC_MKCN(pdata->matrix_key_cols);
}
/* enable rotary key, debounce interval same as direct keys */
if (pdata->enable_rotary0) {
mask |= 0x03;
direct_key_num = 2;
kpc |= KPC_REE0;
}
if (pdata->enable_rotary1) {
mask |= 0x0c;
direct_key_num = 4;
kpc |= KPC_REE1;
}
if (pdata->direct_key_num > direct_key_num)
direct_key_num = pdata->direct_key_num;
keypad->direct_key_mask = ((2 << direct_key_num) - 1) & ~mask;
/* enable direct key */
if (direct_key_num)
kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num);
keypad_writel(KPC, kpc | KPC_RE_ZERO_DEB);
keypad_writel(KPREC, DEFAULT_KPREC);
keypad_writel(KPKDI, pdata->debounce_interval);
}
static int pxa27x_keypad_open(struct input_dev *dev)
{
struct pxa27x_keypad *keypad = input_get_drvdata(dev);
/* Enable unit clock */
clk_enable(keypad->clk);
pxa27x_keypad_config(keypad);
return 0;
}
static void pxa27x_keypad_close(struct input_dev *dev)
{
struct pxa27x_keypad *keypad = input_get_drvdata(dev);
/* Disable clock unit */
clk_disable(keypad->clk);
}
#ifdef CONFIG_PM
static int pxa27x_keypad_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
clk_disable(keypad->clk);
if (device_may_wakeup(&pdev->dev))
enable_irq_wake(keypad->irq);
return 0;
}
static int pxa27x_keypad_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
struct input_dev *input_dev = keypad->input_dev;
if (device_may_wakeup(&pdev->dev))
disable_irq_wake(keypad->irq);
mutex_lock(&input_dev->mutex);
if (input_dev->users) {
/* Enable unit clock */
clk_enable(keypad->clk);
pxa27x_keypad_config(keypad);
}
mutex_unlock(&input_dev->mutex);
return 0;
}
static const struct dev_pm_ops pxa27x_keypad_pm_ops = {
.suspend = pxa27x_keypad_suspend,
.resume = pxa27x_keypad_resume,
};
#endif
static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
{
struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data;
struct pxa27x_keypad *keypad;
struct input_dev *input_dev;
struct resource *res;
int irq, error;
if (pdata == NULL) {
dev_err(&pdev->dev, "no platform data defined\n");
return -EINVAL;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "failed to get keypad irq\n");
return -ENXIO;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "failed to get I/O memory\n");
return -ENXIO;
}
keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL);
input_dev = input_allocate_device();
if (!keypad || !input_dev) {
dev_err(&pdev->dev, "failed to allocate memory\n");
error = -ENOMEM;
goto failed_free;
}
keypad->pdata = pdata;
keypad->input_dev = input_dev;
keypad->irq = irq;
res = request_mem_region(res->start, resource_size(res), pdev->name);
if (res == NULL) {
dev_err(&pdev->dev, "failed to request I/O memory\n");
error = -EBUSY;
goto failed_free;
}
keypad->mmio_base = ioremap(res->start, resource_size(res));
if (keypad->mmio_base == NULL) {
dev_err(&pdev->dev, "failed to remap I/O memory\n");
error = -ENXIO;
goto failed_free_mem;
}
keypad->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(keypad->clk)) {
dev_err(&pdev->dev, "failed to get keypad clock\n");
error = PTR_ERR(keypad->clk);
goto failed_free_io;
}
input_dev->name = pdev->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->keycode = keypad->keycodes;
input_dev->keycodesize = sizeof(keypad->keycodes[0]);
input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
input_set_drvdata(input_dev, keypad);
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
input_set_capability(input_dev, EV_MSC, MSC_SCAN);
pxa27x_keypad_build_keycode(keypad);
if ((pdata->enable_rotary0 && keypad->rotary_rel_code[0] != -1) ||
(pdata->enable_rotary1 && keypad->rotary_rel_code[1] != -1)) {
input_dev->evbit[0] |= BIT_MASK(EV_REL);
}
error = request_irq(irq, pxa27x_keypad_irq_handler, IRQF_DISABLED,
pdev->name, keypad);
if (error) {
dev_err(&pdev->dev, "failed to request IRQ\n");
goto failed_put_clk;
}
/* Register the input device */
error = input_register_device(input_dev);
if (error) {
dev_err(&pdev->dev, "failed to register input device\n");
goto failed_free_irq;
}
platform_set_drvdata(pdev, keypad);
device_init_wakeup(&pdev->dev, 1);
return 0;
failed_free_irq:
free_irq(irq, pdev);
failed_put_clk:
clk_put(keypad->clk);
failed_free_io:
iounmap(keypad->mmio_base);
failed_free_mem:
release_mem_region(res->start, resource_size(res));
failed_free:
input_free_device(input_dev);
kfree(keypad);
return error;
}
static int __devexit pxa27x_keypad_remove(struct platform_device *pdev)
{
struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
struct resource *res;
free_irq(keypad->irq, pdev);
clk_put(keypad->clk);
input_unregister_device(keypad->input_dev);
input_free_device(keypad->input_dev);
iounmap(keypad->mmio_base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, resource_size(res));
platform_set_drvdata(pdev, NULL);
kfree(keypad);
return 0;
}
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:pxa27x-keypad");
static struct platform_driver pxa27x_keypad_driver = {
.probe = pxa27x_keypad_probe,
.remove = __devexit_p(pxa27x_keypad_remove),
.driver = {
.name = "pxa27x-keypad",
.owner = THIS_MODULE,
#ifdef CONFIG_PM
.pm = &pxa27x_keypad_pm_ops,
#endif
},
};
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");