- 根目录:
- drivers
- staging
- asus_oled
- asus_oled.c
/*
* Asus OLED USB driver
*
* Copyright (C) 2007,2008 Jakub Schmidtke (sjakub@gmail.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*
*
* This module is based on usbled and asus-laptop modules.
*
*
* Asus OLED support is based on asusoled program taken from
* <http://lapsus.berlios.de/asus_oled.html>.
*
*
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/platform_device.h>
#include <linux/ctype.h>
#define ASUS_OLED_VERSION "0.04-dev"
#define ASUS_OLED_NAME "asus-oled"
#define ASUS_OLED_UNDERSCORE_NAME "asus_oled"
#define ASUS_OLED_ERROR "Asus OLED Display Error: "
#define ASUS_OLED_STATIC 's'
#define ASUS_OLED_ROLL 'r'
#define ASUS_OLED_FLASH 'f'
#define ASUS_OLED_MAX_WIDTH 1792
#define ASUS_OLED_DISP_HEIGHT 32
#define ASUS_OLED_PACKET_BUF_SIZE 256
#define USB_VENDOR_ID_ASUS 0x0b05
#define USB_DEVICE_ID_ASUS_LCM 0x1726
#define USB_DEVICE_ID_ASUS_LCM2 0x175b
MODULE_AUTHOR("Jakub Schmidtke, sjakub@gmail.com");
MODULE_DESCRIPTION("Asus OLED Driver v" ASUS_OLED_VERSION);
MODULE_LICENSE("GPL");
static struct class *oled_class;
static int oled_num;
static uint start_off;
module_param(start_off, uint, 0644);
MODULE_PARM_DESC(start_off,
"Set to 1 to switch off OLED display after it is attached");
enum oled_pack_mode {
PACK_MODE_G1,
PACK_MODE_G50,
PACK_MODE_LAST
};
struct oled_dev_desc_str {
uint16_t idVendor;
uint16_t idProduct;
/* width of display */
uint16_t devWidth;
/* formula to be used while packing the picture */
enum oled_pack_mode packMode;
const char *devDesc;
};
/* table of devices that work with this driver */
static const struct usb_device_id id_table[] = {
/* Asus G1/G2 (and variants)*/
{ USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM) },
/* Asus G50V (and possibly others - G70? G71?)*/
{ USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2) },
{ },
};
/* parameters of specific devices */
static struct oled_dev_desc_str oled_dev_desc_table[] = {
{ USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM, 128, PACK_MODE_G1,
"G1/G2" },
{ USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2, 256, PACK_MODE_G50,
"G50" },
{ },
};
MODULE_DEVICE_TABLE(usb, id_table);
struct asus_oled_header {
uint8_t magic1;
uint8_t magic2;
uint8_t flags;
uint8_t value3;
uint8_t buffer1;
uint8_t buffer2;
uint8_t value6;
uint8_t value7;
uint8_t value8;
uint8_t padding2[7];
} __attribute((packed));
struct asus_oled_packet {
struct asus_oled_header header;
uint8_t bitmap[ASUS_OLED_PACKET_BUF_SIZE];
} __attribute((packed));
struct asus_oled_dev {
struct usb_device *udev;
uint8_t pic_mode;
uint16_t dev_width;
enum oled_pack_mode pack_mode;
size_t height;
size_t width;
size_t x_shift;
size_t y_shift;
size_t buf_offs;
uint8_t last_val;
size_t buf_size;
char *buf;
uint8_t enabled;
struct device *dev;
};
static void setup_packet_header(struct asus_oled_packet *packet, char flags,
char value3, char buffer1, char buffer2, char value6,
char value7, char value8)
{
memset(packet, 0, sizeof(struct asus_oled_header));
packet->header.magic1 = 0x55;
packet->header.magic2 = 0xaa;
packet->header.flags = flags;
packet->header.value3 = value3;
packet->header.buffer1 = buffer1;
packet->header.buffer2 = buffer2;
packet->header.value6 = value6;
packet->header.value7 = value7;
packet->header.value8 = value8;
}
static void enable_oled(struct asus_oled_dev *odev, uint8_t enabl)
{
int a;
int retval;
int act_len;
struct asus_oled_packet *packet;
packet = kzalloc(sizeof(struct asus_oled_packet), GFP_KERNEL);
if (!packet) {
dev_err(&odev->udev->dev, "out of memory\n");
return;
}
setup_packet_header(packet, 0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00);
if (enabl)
packet->bitmap[0] = 0xaf;
else
packet->bitmap[0] = 0xae;
for (a = 0; a < 1; a++) {
retval = usb_bulk_msg(odev->udev,
usb_sndbulkpipe(odev->udev, 2),
packet,
sizeof(struct asus_oled_header) + 1,
&act_len,
-1);
if (retval)
dev_dbg(&odev->udev->dev, "retval = %d\n", retval);
}
odev->enabled = enabl;
kfree(packet);
}
static ssize_t set_enabled(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_interface *intf = to_usb_interface(dev);
struct asus_oled_dev *odev = usb_get_intfdata(intf);
unsigned long value;
if (strict_strtoul(buf, 10, &value))
return -EINVAL;
enable_oled(odev, value);
return count;
}
static ssize_t class_set_enabled(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct asus_oled_dev *odev =
(struct asus_oled_dev *) dev_get_drvdata(device);
unsigned long value;
if (strict_strtoul(buf, 10, &value))
return -EINVAL;
enable_oled(odev, value);
return count;
}
static ssize_t get_enabled(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct usb_interface *intf = to_usb_interface(dev);
struct asus_oled_dev *odev = usb_get_intfdata(intf);
return sprintf(buf, "%d\n", odev->enabled);
}
static ssize_t class_get_enabled(struct device *device,
struct device_attribute *attr, char *buf)
{
struct asus_oled_dev *odev =
(struct asus_oled_dev *) dev_get_drvdata(device);
return sprintf(buf, "%d\n", odev->enabled);
}
static void send_packets(struct usb_device *udev,
struct asus_oled_packet *packet,
char *buf, uint8_t p_type, size_t p_num)
{
size_t i;
int act_len;
for (i = 0; i < p_num; i++) {
int retval;
switch (p_type) {
case ASUS_OLED_ROLL:
setup_packet_header(packet, 0x40, 0x80, p_num,
i + 1, 0x00, 0x01, 0xff);
break;
case ASUS_OLED_STATIC:
setup_packet_header(packet, 0x10 + i, 0x80, 0x01,
0x01, 0x00, 0x01, 0x00);
break;
case ASUS_OLED_FLASH:
setup_packet_header(packet, 0x10 + i, 0x80, 0x01,
0x01, 0x00, 0x00, 0xff);
break;
}
memcpy(packet->bitmap, buf + (ASUS_OLED_PACKET_BUF_SIZE*i),
ASUS_OLED_PACKET_BUF_SIZE);
retval = usb_bulk_msg(udev, usb_sndctrlpipe(udev, 2),
packet, sizeof(struct asus_oled_packet),
&act_len, -1);
if (retval)
dev_dbg(&udev->dev, "retval = %d\n", retval);
}
}
static void send_packet(struct usb_device *udev,
struct asus_oled_packet *packet,
size_t offset, size_t len, char *buf, uint8_t b1,
uint8_t b2, uint8_t b3, uint8_t b4, uint8_t b5,
uint8_t b6) {
int retval;
int act_len;
setup_packet_header(packet, b1, b2, b3, b4, b5, b6, 0x00);
memcpy(packet->bitmap, buf + offset, len);
retval = usb_bulk_msg(udev,
usb_sndctrlpipe(udev, 2),
packet,
sizeof(struct asus_oled_packet),
&act_len,
-1);
if (retval)
dev_dbg(&udev->dev, "retval = %d\n", retval);
}
static void send_packets_g50(struct usb_device *udev,
struct asus_oled_packet *packet, char *buf)
{
send_packet(udev, packet, 0, 0x100, buf,
0x10, 0x00, 0x02, 0x01, 0x00, 0x01);
send_packet(udev, packet, 0x100, 0x080, buf,
0x10, 0x00, 0x02, 0x02, 0x80, 0x00);
send_packet(udev, packet, 0x180, 0x100, buf,
0x11, 0x00, 0x03, 0x01, 0x00, 0x01);
send_packet(udev, packet, 0x280, 0x100, buf,
0x11, 0x00, 0x03, 0x02, 0x00, 0x01);
send_packet(udev, packet, 0x380, 0x080, buf,
0x11, 0x00, 0x03, 0x03, 0x80, 0x00);
}
static void send_data(struct asus_oled_dev *odev)
{
size_t packet_num = odev->buf_size / ASUS_OLED_PACKET_BUF_SIZE;
struct asus_oled_packet *packet;
packet = kzalloc(sizeof(struct asus_oled_packet), GFP_KERNEL);
if (!packet) {
dev_err(&odev->udev->dev, "out of memory\n");
return;
}
if (odev->pack_mode == PACK_MODE_G1) {
/* When sending roll-mode data the display updated only
first packet. I have no idea why, but when static picture
is sent just before rolling picture everything works fine. */
if (odev->pic_mode == ASUS_OLED_ROLL)
send_packets(odev->udev, packet, odev->buf,
ASUS_OLED_STATIC, 2);
/* Only ROLL mode can use more than 2 packets.*/
if (odev->pic_mode != ASUS_OLED_ROLL && packet_num > 2)
packet_num = 2;
send_packets(odev->udev, packet, odev->buf,
odev->pic_mode, packet_num);
} else if (odev->pack_mode == PACK_MODE_G50) {
send_packets_g50(odev->udev, packet, odev->buf);
}
kfree(packet);
}
static int append_values(struct asus_oled_dev *odev, uint8_t val, size_t count)
{
odev->last_val = val;
if (val == 0) {
odev->buf_offs += count;
return 0;
}
while (count-- > 0) {
size_t x = odev->buf_offs % odev->width;
size_t y = odev->buf_offs / odev->width;
size_t i;
x += odev->x_shift;
y += odev->y_shift;
switch (odev->pack_mode) {
case PACK_MODE_G1:
/* i = (x/128)*640 + 127 - x + (y/8)*128;
This one for 128 is the same, but might be better
for different widths? */
i = (x/odev->dev_width)*640 +
odev->dev_width - 1 - x +
(y/8)*odev->dev_width;
break;
case PACK_MODE_G50:
i = (odev->dev_width - 1 - x)/8 + y*odev->dev_width/8;
break;
default:
i = 0;
printk(ASUS_OLED_ERROR "Unknown OLED Pack Mode: %d!\n",
odev->pack_mode);
break;
}
if (i >= odev->buf_size) {
printk(ASUS_OLED_ERROR "Buffer overflow! Report a bug:"
"offs: %d >= %d i: %d (x: %d y: %d)\n",
(int) odev->buf_offs, (int) odev->buf_size,
(int) i, (int) x, (int) y);
return -EIO;
}
switch (odev->pack_mode) {
case PACK_MODE_G1:
odev->buf[i] &= ~(1<<(y%8));
break;
case PACK_MODE_G50:
odev->buf[i] &= ~(1<<(x%8));
break;
default:
/* cannot get here; stops gcc complaining*/
;
}
odev->buf_offs++;
}
return 0;
}
static ssize_t odev_set_picture(struct asus_oled_dev *odev,
const char *buf, size_t count)
{
size_t offs = 0, max_offs;
if (count < 1)
return 0;
if (tolower(buf[0]) == 'b') {
/* binary mode, set the entire memory*/
size_t i;
odev->buf_size = (odev->dev_width * ASUS_OLED_DISP_HEIGHT) / 8;
kfree(odev->buf);
odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
if (odev->buf == NULL) {
odev->buf_size = 0;
printk(ASUS_OLED_ERROR "Out of memory!\n");
return -ENOMEM;
}
memset(odev->buf, 0xff, odev->buf_size);
for (i = 1; i < count && i <= 32 * 32; i++) {
odev->buf[i-1] = buf[i];
odev->buf_offs = i-1;
}
odev->width = odev->dev_width / 8;
odev->height = ASUS_OLED_DISP_HEIGHT;
odev->x_shift = 0;
odev->y_shift = 0;
odev->last_val = 0;
send_data(odev);
return count;
}
if (buf[0] == '<') {
size_t i;
size_t w = 0, h = 0;
size_t w_mem, h_mem;
if (count < 10 || buf[2] != ':')
goto error_header;
switch (tolower(buf[1])) {
case ASUS_OLED_STATIC:
case ASUS_OLED_ROLL:
case ASUS_OLED_FLASH:
odev->pic_mode = buf[1];
break;
default:
printk(ASUS_OLED_ERROR "Wrong picture mode: '%c'.\n",
buf[1]);
return -EIO;
break;
}
for (i = 3; i < count; ++i) {
if (buf[i] >= '0' && buf[i] <= '9') {
w = 10*w + (buf[i] - '0');
if (w > ASUS_OLED_MAX_WIDTH)
goto error_width;
} else if (tolower(buf[i]) == 'x') {
break;
} else {
goto error_width;
}
}
for (++i; i < count; ++i) {
if (buf[i] >= '0' && buf[i] <= '9') {
h = 10*h + (buf[i] - '0');
if (h > ASUS_OLED_DISP_HEIGHT)
goto error_height;
} else if (tolower(buf[i]) == '>') {
break;
} else {
goto error_height;
}
}
if (w < 1 || w > ASUS_OLED_MAX_WIDTH)
goto error_width;
if (h < 1 || h > ASUS_OLED_DISP_HEIGHT)
goto error_height;
if (i >= count || buf[i] != '>')
goto error_header;
offs = i+1;
if (w % (odev->dev_width) != 0)
w_mem = (w/(odev->dev_width) + 1)*(odev->dev_width);
else
w_mem = w;
if (h < ASUS_OLED_DISP_HEIGHT)
h_mem = ASUS_OLED_DISP_HEIGHT;
else
h_mem = h;
odev->buf_size = w_mem * h_mem / 8;
kfree(odev->buf);
odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
if (odev->buf == NULL) {
odev->buf_size = 0;
printk(ASUS_OLED_ERROR "Out of memory!\n");
return -ENOMEM;
}
memset(odev->buf, 0xff, odev->buf_size);
odev->buf_offs = 0;
odev->width = w;
odev->height = h;
odev->x_shift = 0;
odev->y_shift = 0;
odev->last_val = 0;
if (odev->pic_mode == ASUS_OLED_FLASH) {
if (h < ASUS_OLED_DISP_HEIGHT/2)
odev->y_shift = (ASUS_OLED_DISP_HEIGHT/2 - h)/2;
} else {
if (h < ASUS_OLED_DISP_HEIGHT)
odev->y_shift = (ASUS_OLED_DISP_HEIGHT - h)/2;
}
if (w < (odev->dev_width))
odev->x_shift = ((odev->dev_width) - w)/2;
}
max_offs = odev->width * odev->height;
while (offs < count && odev->buf_offs < max_offs) {
int ret = 0;
if (buf[offs] == '1' || buf[offs] == '#') {
ret = append_values(odev, 1, 1);
if (ret < 0)
return ret;
} else if (buf[offs] == '0' || buf[offs] == ' ') {
ret = append_values(odev, 0, 1);
if (ret < 0)
return ret;
} else if (buf[offs] == '\n') {
/* New line detected. Lets assume, that all characters
till the end of the line were equal to the last
character in this line.*/
if (odev->buf_offs % odev->width != 0)
ret = append_values(odev, odev->last_val,
odev->width -
(odev->buf_offs %
odev->width));
if (ret < 0)
return ret;
}
offs++;
}
if (odev->buf_offs >= max_offs)
send_data(odev);
return count;
error_width:
printk(ASUS_OLED_ERROR "Wrong picture width specified.\n");
return -EIO;
error_height:
printk(ASUS_OLED_ERROR "Wrong picture height specified.\n");
return -EIO;
error_header:
printk(ASUS_OLED_ERROR "Wrong picture header.\n");
return -EIO;
}
static ssize_t set_picture(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_interface *intf = to_usb_interface(dev);
return odev_set_picture(usb_get_intfdata(intf), buf, count);
}
static ssize_t class_set_picture(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
return odev_set_picture((struct asus_oled_dev *)
dev_get_drvdata(device), buf, count);
}
#define ASUS_OLED_DEVICE_ATTR(_file) dev_attr_asus_oled_##_file
static DEVICE_ATTR(asus_oled_enabled, S_IWUSR | S_IRUGO,
get_enabled, set_enabled);
static DEVICE_ATTR(asus_oled_picture, S_IWUSR , NULL, set_picture);
static DEVICE_ATTR(enabled, S_IWUSR | S_IRUGO,
class_get_enabled, class_set_enabled);
static DEVICE_ATTR(picture, S_IWUSR, NULL, class_set_picture);
static int asus_oled_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct asus_oled_dev *odev = NULL;
int retval = -ENOMEM;
uint16_t dev_width = 0;
enum oled_pack_mode pack_mode = PACK_MODE_LAST;
const struct oled_dev_desc_str *dev_desc = oled_dev_desc_table;
const char *desc = NULL;
if (!id) {
/* Even possible? Just to make sure...*/
dev_err(&interface->dev, "No usb_device_id provided!\n");
return -ENODEV;
}
for (; dev_desc->idVendor; dev_desc++) {
if (dev_desc->idVendor == id->idVendor
&& dev_desc->idProduct == id->idProduct) {
dev_width = dev_desc->devWidth;
desc = dev_desc->devDesc;
pack_mode = dev_desc->packMode;
break;
}
}
if (!desc || dev_width < 1 || pack_mode == PACK_MODE_LAST) {
dev_err(&interface->dev,
"Missing or incomplete device description!\n");
return -ENODEV;
}
odev = kzalloc(sizeof(struct asus_oled_dev), GFP_KERNEL);
if (odev == NULL) {
dev_err(&interface->dev, "Out of memory\n");
return -ENOMEM;
}
odev->udev = usb_get_dev(udev);
odev->pic_mode = ASUS_OLED_STATIC;
odev->dev_width = dev_width;
odev->pack_mode = pack_mode;
odev->height = 0;
odev->width = 0;
odev->x_shift = 0;
odev->y_shift = 0;
odev->buf_offs = 0;
odev->buf_size = 0;
odev->last_val = 0;
odev->buf = NULL;
odev->enabled = 1;
odev->dev = NULL;
usb_set_intfdata(interface, odev);
retval = device_create_file(&interface->dev,
&ASUS_OLED_DEVICE_ATTR(enabled));
if (retval)
goto err_files;
retval = device_create_file(&interface->dev,
&ASUS_OLED_DEVICE_ATTR(picture));
if (retval)
goto err_files;
odev->dev = device_create(oled_class, &interface->dev, MKDEV(0, 0),
NULL, "oled_%d", ++oled_num);
if (IS_ERR(odev->dev)) {
retval = PTR_ERR(odev->dev);
goto err_files;
}
dev_set_drvdata(odev->dev, odev);
retval = device_create_file(odev->dev, &dev_attr_enabled);
if (retval)
goto err_class_enabled;
retval = device_create_file(odev->dev, &dev_attr_picture);
if (retval)
goto err_class_picture;
dev_info(&interface->dev,
"Attached Asus OLED device: %s [width %u, pack_mode %d]\n",
desc, odev->dev_width, odev->pack_mode);
if (start_off)
enable_oled(odev, 0);
return 0;
err_class_picture:
device_remove_file(odev->dev, &dev_attr_picture);
err_class_enabled:
device_remove_file(odev->dev, &dev_attr_enabled);
device_unregister(odev->dev);
err_files:
device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
usb_set_intfdata(interface, NULL);
usb_put_dev(odev->udev);
kfree(odev);
return retval;
}
static void asus_oled_disconnect(struct usb_interface *interface)
{
struct asus_oled_dev *odev;
odev = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
device_remove_file(odev->dev, &dev_attr_picture);
device_remove_file(odev->dev, &dev_attr_enabled);
device_unregister(odev->dev);
device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
usb_put_dev(odev->udev);
kfree(odev->buf);
kfree(odev);
dev_info(&interface->dev, "Disconnected Asus OLED device\n");
}
static struct usb_driver oled_driver = {
.name = ASUS_OLED_NAME,
.probe = asus_oled_probe,
.disconnect = asus_oled_disconnect,
.id_table = id_table,
};
static CLASS_ATTR_STRING(version, S_IRUGO,
ASUS_OLED_UNDERSCORE_NAME " " ASUS_OLED_VERSION);
static int __init asus_oled_init(void)
{
int retval = 0;
oled_class = class_create(THIS_MODULE, ASUS_OLED_UNDERSCORE_NAME);
if (IS_ERR(oled_class)) {
err("Error creating " ASUS_OLED_UNDERSCORE_NAME " class");
return PTR_ERR(oled_class);
}
retval = class_create_file(oled_class, &class_attr_version.attr);
if (retval) {
err("Error creating class version file");
goto error;
}
retval = usb_register(&oled_driver);
if (retval) {
err("usb_register failed. Error number %d", retval);
goto error;
}
return retval;
error:
class_destroy(oled_class);
return retval;
}
static void __exit asus_oled_exit(void)
{
usb_deregister(&oled_driver);
class_remove_file(oled_class, &class_attr_version.attr);
class_destroy(oled_class);
}
module_init(asus_oled_init);
module_exit(asus_oled_exit);