diff options
author | Jakub Schmidtke <sjakub@gmail.com> | 2008-11-04 23:46:58 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-01-06 13:52:28 -0800 |
commit | fb53440b187f0cfc1f116e580e9c7e9931191f9c (patch) | |
tree | 9498472816f700da34970982a7c7c90661e06bd9 /drivers/staging/asus_oled/asus_oled.c | |
parent | a8275fcaa7ca1f720f0c1b1c4c373964ffc9f72d (diff) |
Staging: add asus_oled driver
Driver for the OLED tiny display on some Asus laptops.
From: Jakub Schmidtke <sjakub@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/asus_oled/asus_oled.c')
-rw-r--r-- | drivers/staging/asus_oled/asus_oled.c | 745 |
1 files changed, 745 insertions, 0 deletions
diff --git a/drivers/staging/asus_oled/asus_oled.c b/drivers/staging/asus_oled/asus_oled.c new file mode 100644 index 00000000000..666a186e212 --- /dev/null +++ b/drivers/staging/asus_oled/asus_oled.c @@ -0,0 +1,745 @@ +/* + * 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 + * https://launchpad.net/asusoled/. + * + * + */ + +#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 + +MODULE_AUTHOR("Jakub Schmidtke, sjakub@gmail.com"); +MODULE_DESCRIPTION("Asus OLED Driver v" ASUS_OLED_VERSION); +MODULE_LICENSE("GPL"); + +static struct class *oled_class = 0; +static int oled_num = 0; + +static uint start_off = 0; + +module_param(start_off, uint, 0644); + +MODULE_PARM_DESC(start_off, "Set to 1 to switch off OLED display after it is attached"); + +typedef enum { + PACK_MODE_G1, + PACK_MODE_G50, + PACK_MODE_LAST +} oled_pack_mode_t; + +struct oled_dev_desc_str { + uint16_t idVendor; + uint16_t idProduct; + uint16_t devWidth; // width of display + oled_pack_mode_t packMode; // formula to be used while packing the picture + const char *devDesc; +}; + +/* table of devices that work with this driver */ +static struct usb_device_id id_table [] = { + { USB_DEVICE(0x0b05, 0x1726) }, // Asus G1/G2 (and variants) + { USB_DEVICE(0x0b05, 0x175b) }, // Asus G50V (and possibly others - G70? G71?) + { }, +}; + +/* parameters of specific devices */ +static struct oled_dev_desc_str oled_dev_desc_table [] = { + { 0x0b05, 0x1726, 128, PACK_MODE_G1, "G1/G2" }, + { 0x0b05, 0x175b, 256, PACK_MODE_G50, "G50" }, + { }, +}; + +MODULE_DEVICE_TABLE (usb, id_table); + +#define SETUP_PACKET_HEADER(packet, val1, val2, val3, val4, val5, val6, val7) \ + do { \ + memset(packet, 0, sizeof(struct asus_oled_header)); \ + packet->header.magic1 = 0x55; \ + packet->header.magic2 = 0xaa; \ + packet->header.flags = val1; \ + packet->header.value3 = val2; \ + packet->header.buffer1 = val3; \ + packet->header.buffer2 = val4; \ + packet->header.value6 = val5; \ + packet->header.value7 = val6; \ + packet->header.value8 = val7; \ + } while(0); + +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; + oled_pack_mode_t 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 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); + int temp = simple_strtoul(buf, NULL, 10); + + enable_oled(odev, temp); + + 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); + + int temp = simple_strtoul(buf, NULL, 10); + + enable_oled(odev, temp); + + 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 send 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) +{ + while (count-- > 0) { + if (val) { + 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 in the driver: 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->last_val = val; + 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; + + if (odev->buf) kfree(odev->buf); + odev->buf = kmalloc(odev->buf_size, GFP_KERNEL); + + 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; + + if (odev->buf) 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; + + if (buf[offs] == '1' || buf[offs] == '#') { + if ( (ret = append_values(odev, 1, 1)) < 0) return ret; + } + else if (buf[offs] == '0' || buf[offs] == ' ') { + if ( (ret = append_values(odev, 0, 1)) < 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) + if ( (ret = append_values(odev, odev->last_val, + odev->width - (odev->buf_offs % odev->width))) < 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_IWUGO | S_IRUGO, get_enabled, set_enabled); +static DEVICE_ATTR(asus_oled_picture, S_IWUGO , NULL, set_picture); + +static DEVICE_ATTR(enabled, S_IWUGO | S_IRUGO, class_get_enabled, class_set_enabled); +static DEVICE_ATTR(picture, S_IWUGO, 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; + oled_pack_mode_t pack_mode = PACK_MODE_LAST; + const struct oled_dev_desc_str * dev_desc = oled_dev_desc_table; + const char *desc = 0; + + if (id == 0) { + // 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 = 0; + + usb_set_intfdata (interface, odev); + + if ((retval = device_create_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled)))) { + goto err_files; + } + + if ((retval = device_create_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture)))) { + 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); + + if ( (retval = device_create_file(odev->dev, &dev_attr_enabled))) { + goto err_class_enabled; + } + + if ( (retval = device_create_file(odev->dev, &dev_attr_picture))) { + 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); + + if (odev->buf) 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 ssize_t version_show(struct class *dev, char *buf) +{ + return sprintf(buf, ASUS_OLED_UNDERSCORE_NAME " %s\n", ASUS_OLED_VERSION); +} + +static CLASS_ATTR(version, S_IRUGO, version_show, NULL); + +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); + } + + if ((retval = class_create_file(oled_class, &class_attr_version))) { + 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) +{ + class_remove_file(oled_class, &class_attr_version); + class_destroy(oled_class); + + usb_deregister(&oled_driver); +} + +module_init (asus_oled_init); +module_exit (asus_oled_exit); + |