leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Browse Source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: add driver for Atmel integrated touchscreen controller
  Input: ads7846 - optimize order of calculating Rt in ads7846_rx()
  Input: ads7846 - fix sparse endian warnings
  Input: uinput - remove duplicate include
  Input: serio - offload resume to kseriod
  Input: serio - mark serio_register_driver() __must_check
This commit is contained in:
Linus Torvalds 2008-07-28 09:59:26 -07:00
commit f934fb19ef
7 changed files with 390 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/input/misc/uinput.c
View File

@ -37,7 +37,6 @@
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/uinput.h>
#include <linux/smp_lock.h>
static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{

55
drivers/input/serio/serio.c
View File

@ -63,8 +63,9 @@ static LIST_HEAD(serio_list);
static struct bus_type serio_bus;
static void serio_add_port(struct serio *serio);
static void serio_reconnect_port(struct serio *serio);
static int serio_reconnect_port(struct serio *serio);
static void serio_disconnect_port(struct serio *serio);
static void serio_reconnect_chain(struct serio *serio);
static void serio_attach_driver(struct serio_driver *drv);
static int serio_connect_driver(struct serio *serio, struct serio_driver *drv)
@ -161,6 +162,7 @@ static void serio_find_driver(struct serio *serio)
enum serio_event_type {
SERIO_RESCAN_PORT,
SERIO_RECONNECT_PORT,
SERIO_RECONNECT_CHAIN,
SERIO_REGISTER_PORT,
SERIO_ATTACH_DRIVER,
};
@ -315,6 +317,10 @@ static void serio_handle_event(void)
serio_find_driver(event->object);
break;
case SERIO_RECONNECT_CHAIN:
serio_reconnect_chain(event->object);
break;
case SERIO_ATTACH_DRIVER:
serio_attach_driver(event->object);
break;
@ -470,7 +476,7 @@ static ssize_t serio_rebind_driver(struct device *dev, struct device_attribute *
if (!strncmp(buf, "none", count)) {
serio_disconnect_port(serio);
} else if (!strncmp(buf, "reconnect", count)) {
serio_reconnect_port(serio);
serio_reconnect_chain(serio);
} else if (!strncmp(buf, "rescan", count)) {
serio_disconnect_port(serio);
serio_find_driver(serio);
@ -619,15 +625,31 @@ static void serio_destroy_port(struct serio *serio)
put_device(&serio->dev);
}
/*
* Reconnect serio port (re-initialize attached device).
* If reconnect fails (old device is no longer attached or
* there was no device to begin with) we do full rescan in
* hope of finding a driver for the port.
*/
static int serio_reconnect_port(struct serio *serio)
{
int error = serio_reconnect_driver(serio);
if (error) {
serio_disconnect_port(serio);
serio_find_driver(serio);
}
return error;
}
/*
* Reconnect serio port and all its children (re-initialize attached devices)
*/
static void serio_reconnect_port(struct serio *serio)
static void serio_reconnect_chain(struct serio *serio)
{
do {
if (serio_reconnect_driver(serio)) {
serio_disconnect_port(serio);
serio_find_driver(serio);
if (serio_reconnect_port(serio)) {
/* Ok, old children are now gone, we are done */
break;
}
@ -673,7 +695,7 @@ void serio_rescan(struct serio *serio)
void serio_reconnect(struct serio *serio)
{
serio_queue_event(serio, NULL, SERIO_RECONNECT_PORT);
serio_queue_event(serio, NULL, SERIO_RECONNECT_CHAIN);
}
/*
@ -927,19 +949,16 @@ static int serio_suspend(struct device *dev, pm_message_t state)
static int serio_resume(struct device *dev)
{
struct serio *serio = to_serio_port(dev);
if (dev->power.power_state.event != PM_EVENT_ON &&
serio_reconnect_driver(serio)) {
/*
* Driver re-probing can take a while, so better let kseriod
* deal with it.
*/
serio_rescan(serio);
/*
* Driver reconnect can take a while, so better let kseriod
* deal with it.
*/
if (dev->power.power_state.event != PM_EVENT_ON) {
dev->power.power_state = PMSG_ON;
serio_queue_event(to_serio_port(dev), NULL,
SERIO_RECONNECT_PORT);
}
dev->power.power_state = PMSG_ON;
return 0;
}
#endif /* CONFIG_PM */

12
drivers/input/touchscreen/Kconfig
View File

@ -205,6 +205,18 @@ config TOUCHSCREEN_TOUCHWIN
To compile this driver as a module, choose M here: the
module will be called touchwin.
config TOUCHSCREEN_ATMEL_TSADCC
tristate "Atmel Touchscreen Interface"
depends on ARCH_AT91SAM9RL
help
Say Y here if you have a 4-wire touchscreen connected to the
ADC Controller on your Atmel SoC (such as the AT91SAM9RL).
If unsure, say N.
To compile this driver as a module, choose M here: the
module will be called atmel_tsadcc.
config TOUCHSCREEN_UCB1400
tristate "Philips UCB1400 touchscreen"
select AC97_BUS

1
drivers/input/touchscreen/Makefile
View File

@ -7,6 +7,7 @@
wm97xx-ts-y := wm97xx-core.o
obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o
obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o
obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o
obj-$(CONFIG_TOUCHSCREEN_CORGI) += corgi_ts.o
obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o

16
drivers/input/touchscreen/ads7846.c
View File

@ -517,7 +517,9 @@ static void ads7846_rx(void *ads)
if (x == MAX_12BIT)
x = 0;
if (likely(x && z1)) {
if (ts->model == 7843) {
Rt = ts->pressure_max / 2;
} else if (likely(x && z1)) {
/* compute touch pressure resistance using equation #2 */
Rt = z2;
Rt -= z1;
@ -525,11 +527,9 @@ static void ads7846_rx(void *ads)
Rt *= ts->x_plate_ohms;
Rt /= z1;
Rt = (Rt + 2047) >> 12;
} else
} else {
Rt = 0;
if (ts->model == 7843)
Rt = ts->pressure_max / 2;
}
/* Sample found inconsistent by debouncing or pressure is beyond
* the maximum. Don't report it to user space, repeat at least
@ -633,19 +633,17 @@ static void ads7846_rx_val(void *ads)
struct ads7846 *ts = ads;
struct spi_message *m;
struct spi_transfer *t;
u16 *rx_val;
int val;
int action;
int status;
m = &ts->msg[ts->msg_idx];
t = list_entry(m->transfers.prev, struct spi_transfer, transfer_list);
rx_val = t->rx_buf;
/* adjust: on-wire is a must-ignore bit, a BE12 value, then padding;
* built from two 8 bit values written msb-first.
*/
val = be16_to_cpu(*rx_val) >> 3;
val = be16_to_cpup((__be16 *)t->rx_buf) >> 3;
action = ts->filter(ts->filter_data, ts->msg_idx, &val);
switch (action) {
@ -659,7 +657,7 @@ static void ads7846_rx_val(void *ads)
m = ts->last_msg;
break;
case ADS7846_FILTER_OK:
*rx_val = val;
*(u16 *)t->rx_buf = val;
ts->tc.ignore = 0;
m = &ts->msg[++ts->msg_idx];
break;

332
drivers/input/touchscreen/atmel_tsadcc.c Normal file
View File

@ -0,0 +1,332 @@
/*
* Atmel Touch Screen Driver
*
* Copyright (c) 2008 ATMEL
* Copyright (c) 2008 Dan Liang
* Copyright (c) 2008 TimeSys Corporation
* Copyright (c) 2008 Justin Waters
*
* Based on touchscreen code from Atmel Corporation.
*
* 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/init.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/io.h>
/* Register definitions based on AT91SAM9RL64 preliminary draft datasheet */
#define ATMEL_TSADCC_CR 0x00 /* Control register */
#define ATMEL_TSADCC_SWRST (1 << 0) /* Software Reset*/
#define ATMEL_TSADCC_START (1 << 1) /* Start conversion */
#define ATMEL_TSADCC_MR 0x04 /* Mode register */
#define ATMEL_TSADCC_TSAMOD (3 << 0) /* ADC mode */
#define ATMEL_TSADCC_TSAMOD_ADC_ONLY_MODE (0x0) /* ADC Mode */
#define ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE (0x1) /* Touch Screen Only Mode */
#define ATMEL_TSADCC_LOWRES (1 << 4) /* Resolution selection */
#define ATMEL_TSADCC_SLEEP (1 << 5) /* Sleep mode */
#define ATMEL_TSADCC_PENDET (1 << 6) /* Pen Detect selection */
#define ATMEL_TSADCC_PRESCAL (0x3f << 8) /* Prescalar Rate Selection */
#define ATMEL_TSADCC_STARTUP (0x7f << 16) /* Start Up time */
#define ATMEL_TSADCC_SHTIM (0xf << 24) /* Sample & Hold time */
#define ATMEL_TSADCC_PENDBC (0xf << 28) /* Pen Detect debouncing time */
#define ATMEL_TSADCC_TRGR 0x08 /* Trigger register */
#define ATMEL_TSADCC_TRGMOD (7 << 0) /* Trigger mode */
#define ATMEL_TSADCC_TRGMOD_NONE (0 << 0)
#define ATMEL_TSADCC_TRGMOD_EXT_RISING (1 << 0)
#define ATMEL_TSADCC_TRGMOD_EXT_FALLING (2 << 0)
#define ATMEL_TSADCC_TRGMOD_EXT_ANY (3 << 0)
#define ATMEL_TSADCC_TRGMOD_PENDET (4 << 0)
#define ATMEL_TSADCC_TRGMOD_PERIOD (5 << 0)
#define ATMEL_TSADCC_TRGMOD_CONTINUOUS (6 << 0)
#define ATMEL_TSADCC_TRGPER (0xffff << 16) /* Trigger period */
#define ATMEL_TSADCC_TSR 0x0C /* Touch Screen register */
#define ATMEL_TSADCC_TSFREQ (0xf << 0) /* TS Frequency in Interleaved mode */
#define ATMEL_TSADCC_TSSHTIM (0xf << 24) /* Sample & Hold time */
#define ATMEL_TSADCC_CHER 0x10 /* Channel Enable register */
#define ATMEL_TSADCC_CHDR 0x14 /* Channel Disable register */
#define ATMEL_TSADCC_CHSR 0x18 /* Channel Status register */
#define ATMEL_TSADCC_CH(n) (1 << (n)) /* Channel number */
#define ATMEL_TSADCC_SR 0x1C /* Status register */
#define ATMEL_TSADCC_EOC(n) (1 << ((n)+0)) /* End of conversion for channel N */
#define ATMEL_TSADCC_OVRE(n) (1 << ((n)+8)) /* Overrun error for channel N */
#define ATMEL_TSADCC_DRDY (1 << 16) /* Data Ready */
#define ATMEL_TSADCC_GOVRE (1 << 17) /* General Overrun Error */
#define ATMEL_TSADCC_ENDRX (1 << 18) /* End of RX Buffer */
#define ATMEL_TSADCC_RXBUFF (1 << 19) /* TX Buffer full */
#define ATMEL_TSADCC_PENCNT (1 << 20) /* Pen contact */
#define ATMEL_TSADCC_NOCNT (1 << 21) /* No contact */
#define ATMEL_TSADCC_LCDR 0x20 /* Last Converted Data register */
#define ATMEL_TSADCC_DATA (0x3ff << 0) /* Channel data */
#define ATMEL_TSADCC_IER 0x24 /* Interrupt Enable register */
#define ATMEL_TSADCC_IDR 0x28 /* Interrupt Disable register */
#define ATMEL_TSADCC_IMR 0x2C /* Interrupt Mask register */
#define ATMEL_TSADCC_CDR0 0x30 /* Channel Data 0 */
#define ATMEL_TSADCC_CDR1 0x34 /* Channel Data 1 */
#define ATMEL_TSADCC_CDR2 0x38 /* Channel Data 2 */
#define ATMEL_TSADCC_CDR3 0x3C /* Channel Data 3 */
#define ATMEL_TSADCC_CDR4 0x40 /* Channel Data 4 */
#define ATMEL_TSADCC_CDR5 0x44 /* Channel Data 5 */
#define ADC_CLOCK 1000000
struct atmel_tsadcc {
struct input_dev *input;
char phys[32];
struct clk *clk;
int irq;
};
static void __iomem *tsc_base;
#define atmel_tsadcc_read(reg) __raw_readl(tsc_base + (reg))
#define atmel_tsadcc_write(reg, val) __raw_writel((val), tsc_base + (reg))
static irqreturn_t atmel_tsadcc_interrupt(int irq, void *dev)
{
struct input_dev *input_dev = ((struct atmel_tsadcc *)dev)->input;
unsigned int absx;
unsigned int absy;
unsigned int status;
unsigned int reg;
status = atmel_tsadcc_read(ATMEL_TSADCC_SR);
status &= atmel_tsadcc_read(ATMEL_TSADCC_IMR);
if (status & ATMEL_TSADCC_NOCNT) {
/* Contact lost */
reg = atmel_tsadcc_read(ATMEL_TSADCC_MR) | ATMEL_TSADCC_PENDBC;
atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
atmel_tsadcc_write(ATMEL_TSADCC_IDR,
ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
input_report_key(input_dev, BTN_TOUCH, 0);
input_sync(input_dev);
} else if (status & ATMEL_TSADCC_PENCNT) {
/* Pen detected */
reg = atmel_tsadcc_read(ATMEL_TSADCC_MR);
reg &= ~ATMEL_TSADCC_PENDBC;
atmel_tsadcc_write(ATMEL_TSADCC_IDR, ATMEL_TSADCC_PENCNT);
atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
atmel_tsadcc_write(ATMEL_TSADCC_IER,
ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT);
atmel_tsadcc_write(ATMEL_TSADCC_TRGR,
ATMEL_TSADCC_TRGMOD_PERIOD | (0x0FFF << 16));
} else if (status & ATMEL_TSADCC_EOC(3)) {
/* Conversion finished */
absx = atmel_tsadcc_read(ATMEL_TSADCC_CDR3) << 10;
absx /= atmel_tsadcc_read(ATMEL_TSADCC_CDR2);
absy = atmel_tsadcc_read(ATMEL_TSADCC_CDR1) << 10;
absy /= atmel_tsadcc_read(ATMEL_TSADCC_CDR0);
input_report_abs(input_dev, ABS_X, absx);
input_report_abs(input_dev, ABS_Y, absy);
input_report_key(input_dev, BTN_TOUCH, 1);
input_sync(input_dev);
}
return IRQ_HANDLED;
}
/*
* The functions for inserting/removing us as a module.
*/
static int __devinit atmel_tsadcc_probe(struct platform_device *pdev)
{
struct atmel_tsadcc *ts_dev;
struct input_dev *input_dev;
struct resource *res;
int err = 0;
unsigned int prsc;
unsigned int reg;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "no mmio resource defined.\n");
return -ENXIO;
}
/* Allocate memory for device */
ts_dev = kzalloc(sizeof(struct atmel_tsadcc), GFP_KERNEL);
if (!ts_dev) {
dev_err(&pdev->dev, "failed to allocate memory.\n");
return -ENOMEM;
}
platform_set_drvdata(pdev, ts_dev);
input_dev = input_allocate_device();
if (!input_dev) {
dev_err(&pdev->dev, "failed to allocate input device.\n");
err = -EBUSY;
goto err_free_mem;
}
ts_dev->irq = platform_get_irq(pdev, 0);
if (ts_dev->irq < 0) {
dev_err(&pdev->dev, "no irq ID is designated.\n");
err = -ENODEV;
goto err_free_dev;
}
if (!request_mem_region(res->start, res->end - res->start + 1,
"atmel tsadcc regs")) {
dev_err(&pdev->dev, "resources is unavailable.\n");
err = -EBUSY;
goto err_free_dev;
}
tsc_base = ioremap(res->start, res->end - res->start + 1);
if (!tsc_base) {
dev_err(&pdev->dev, "failed to map registers.\n");
err = -ENOMEM;
goto err_release_mem;
}
err = request_irq(ts_dev->irq, atmel_tsadcc_interrupt, IRQF_DISABLED,
pdev->dev.driver->name, ts_dev);
if (err) {
dev_err(&pdev->dev, "failed to allocate irq.\n");
goto err_unmap_regs;
}
ts_dev->clk = clk_get(&pdev->dev, "tsc_clk");
if (IS_ERR(ts_dev->clk)) {
dev_err(&pdev->dev, "failed to get ts_clk\n");
err = PTR_ERR(ts_dev->clk);
goto err_free_irq;
}
ts_dev->input = input_dev;
snprintf(ts_dev->phys, sizeof(ts_dev->phys),
"%s/input0", pdev->dev.bus_id);
input_dev->name = "atmel touch screen controller";
input_dev->phys = ts_dev->phys;
input_dev->dev.parent = &pdev->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, 0, 0x3FF, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, 0x3FF, 0, 0);
/* clk_enable() always returns 0, no need to check it */
clk_enable(ts_dev->clk);
prsc = clk_get_rate(ts_dev->clk);
dev_info(&pdev->dev, "Master clock is set at: %d Hz\n", prsc);
prsc = prsc / ADC_CLOCK / 2 - 1;
reg = ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE |
((0x00 << 5) & ATMEL_TSADCC_SLEEP) | /* Normal Mode */
((0x01 << 6) & ATMEL_TSADCC_PENDET) | /* Enable Pen Detect */
((prsc << 8) & ATMEL_TSADCC_PRESCAL) | /* PRESCAL */
((0x13 << 16) & ATMEL_TSADCC_STARTUP) | /* STARTUP */
((0x0F << 28) & ATMEL_TSADCC_PENDBC); /* PENDBC */
atmel_tsadcc_write(ATMEL_TSADCC_CR, ATMEL_TSADCC_SWRST);
atmel_tsadcc_write(ATMEL_TSADCC_MR, reg);
atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE);
atmel_tsadcc_write(ATMEL_TSADCC_TSR, (0x3 << 24) & ATMEL_TSADCC_TSSHTIM);
atmel_tsadcc_read(ATMEL_TSADCC_SR);
atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT);
/* All went ok, so register to the input system */
err = input_register_device(input_dev);
if (err)
goto err_fail;
return 0;
err_fail:
clk_disable(ts_dev->clk);
clk_put(ts_dev->clk);
err_free_irq:
free_irq(ts_dev->irq, ts_dev);
err_unmap_regs:
iounmap(tsc_base);
err_release_mem:
release_mem_region(res->start, res->end - res->start + 1);
err_free_dev:
input_free_device(ts_dev->input);
err_free_mem:
kfree(ts_dev);
return err;
}
static int __devexit atmel_tsadcc_remove(struct platform_device *pdev)
{
struct atmel_tsadcc *ts_dev = dev_get_drvdata(&pdev->dev);
struct resource *res;
free_irq(ts_dev->irq, ts_dev);
input_unregister_device(ts_dev->input);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
iounmap(tsc_base);
release_mem_region(res->start, res->end - res->start + 1);
clk_disable(ts_dev->clk);
clk_put(ts_dev->clk);
kfree(ts_dev);
return 0;
}
static struct platform_driver atmel_tsadcc_driver = {
.probe = atmel_tsadcc_probe,
.remove = __devexit_p(atmel_tsadcc_remove),
.driver = {
.name = "atmel_tsadcc",
},
};
static int __init atmel_tsadcc_init(void)
{
return platform_driver_register(&atmel_tsadcc_driver);
}
static void __exit atmel_tsadcc_exit(void)
{
platform_driver_unregister(&atmel_tsadcc_driver);
}
module_init(atmel_tsadcc_init);
module_exit(atmel_tsadcc_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Atmel TouchScreen Driver");
MODULE_AUTHOR("Dan Liang <dan.liang@atmel.com>");

3
include/linux/serio.h
View File

@ -87,11 +87,10 @@ void serio_unregister_port(struct serio *serio);
void serio_unregister_child_port(struct serio *serio);
int __serio_register_driver(struct serio_driver *drv, struct module *owner, const char *mod_name);
static inline int serio_register_driver(struct serio_driver *drv)
static inline int __must_check serio_register_driver(struct serio_driver *drv)
{
return __serio_register_driver(drv, THIS_MODULE, KBUILD_MODNAME);
}
int serio_register_driver(struct serio_driver *drv);
void serio_unregister_driver(struct serio_driver *drv);
static inline int serio_write(struct serio *serio, unsigned char data)