diff options
Diffstat (limited to 'drivers/staging/samsung-laptop/samsung-laptop.c')
| -rw-r--r-- | drivers/staging/samsung-laptop/samsung-laptop.c | 548 |
1 files changed, 0 insertions, 548 deletions
diff --git a/drivers/staging/samsung-laptop/samsung-laptop.c b/drivers/staging/samsung-laptop/samsung-laptop.c deleted file mode 100644 index 701e8d52a9fa..000000000000 --- a/drivers/staging/samsung-laptop/samsung-laptop.c +++ /dev/null @@ -1,548 +0,0 @@ -/* - * Samsung N130 Laptop driver - * - * Copyright (C) 2009 Greg Kroah-Hartman (gregkh@suse.de) - * Copyright (C) 2009 Novell Inc. - * - * 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/init.h> -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/pci.h> -#include <linux/backlight.h> -#include <linux/fb.h> -#include <linux/dmi.h> -#include <linux/platform_device.h> -#include <linux/rfkill.h> - -/* - * This driver is needed because a number of Samsung laptops do not hook - * their control settings through ACPI. So we have to poke around in the - * BIOS to do things like brightness values, and "special" key controls. - */ - -/* - * We have 0 - 8 as valid brightness levels. The specs say that level 0 should - * be reserved by the BIOS (which really doesn't make much sense), we tell - * userspace that the value is 0 - 7 and then just tell the hardware 1 - 8 - */ -#define MAX_BRIGHT 0x07 - -/* Brightness is 0 - 8, as described above. Value 0 is for the BIOS to use */ -#define GET_BRIGHTNESS 0x00 -#define SET_BRIGHTNESS 0x01 - -/* first byte: - * 0x00 - wireless is off - * 0x01 - wireless is on - * second byte: - * 0x02 - 3G is off - * 0x03 - 3G is on - * TODO, verify 3G is correct, that doesn't seem right... - */ -#define GET_WIRELESS_BUTTON 0x02 -#define SET_WIRELESS_BUTTON 0x03 - -/* 0 is off, 1 is on */ -#define GET_BACKLIGHT 0x04 -#define SET_BACKLIGHT 0x05 - -/* - * 0x80 or 0x00 - no action - * 0x81 - recovery key pressed - */ -#define GET_RECOVERY_METHOD 0x06 -#define SET_RECOVERY_METHOD 0x07 - -/* 0 is low, 1 is high */ -#define GET_PERFORMANCE_LEVEL 0x08 -#define SET_PERFORMANCE_LEVEL 0x09 - -/* - * Tell the BIOS that Linux is running on this machine. - * 81 is on, 80 is off - */ -#define SET_LINUX 0x0a - - -#define MAIN_FUNCTION 0x4c49 - -#define SABI_HEADER_PORT 0x00 -#define SABI_HEADER_RE_MEM 0x02 -#define SABI_HEADER_IFACEFUNC 0x03 -#define SABI_HEADER_EN_MEM 0x04 -#define SABI_HEADER_DATA_OFFSET 0x05 -#define SABI_HEADER_DATA_SEGMENT 0x07 - -#define SABI_IFACE_MAIN 0x00 -#define SABI_IFACE_SUB 0x02 -#define SABI_IFACE_COMPLETE 0x04 -#define SABI_IFACE_DATA 0x05 - -/* Structure to get data back to the calling function */ -struct sabi_retval { - u8 retval[20]; -}; - -static void __iomem *sabi; -static void __iomem *sabi_iface; -static void __iomem *f0000_segment; -static struct backlight_device *backlight_device; -static struct mutex sabi_mutex; -static struct platform_device *sdev; -static struct rfkill *rfk; - -static int force; -module_param(force, bool, 0); -MODULE_PARM_DESC(force, - "Disable the DMI check and forces the driver to be loaded"); - -static int debug; -module_param(debug, bool, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(debug, "Debug enabled or not"); - -static int sabi_get_command(u8 command, struct sabi_retval *sretval) -{ - int retval = 0; - u16 port = readw(sabi + SABI_HEADER_PORT); - - mutex_lock(&sabi_mutex); - - /* enable memory to be able to write to it */ - outb(readb(sabi + SABI_HEADER_EN_MEM), port); - - /* write out the command */ - writew(MAIN_FUNCTION, sabi_iface + SABI_IFACE_MAIN); - writew(command, sabi_iface + SABI_IFACE_SUB); - writeb(0, sabi_iface + SABI_IFACE_COMPLETE); - outb(readb(sabi + SABI_HEADER_IFACEFUNC), port); - - /* write protect memory to make it safe */ - outb(readb(sabi + SABI_HEADER_RE_MEM), port); - - /* see if the command actually succeeded */ - if (readb(sabi_iface + SABI_IFACE_COMPLETE) == 0xaa && - readb(sabi_iface + SABI_IFACE_DATA) != 0xff) { - /* - * It did! - * Save off the data into a structure so the caller use it. - * Right now we only care about the first 4 bytes, - * I suppose there are commands that need more, but I don't - * know about them. - */ - sretval->retval[0] = readb(sabi_iface + SABI_IFACE_DATA); - sretval->retval[1] = readb(sabi_iface + SABI_IFACE_DATA + 1); - sretval->retval[2] = readb(sabi_iface + SABI_IFACE_DATA + 2); - sretval->retval[3] = readb(sabi_iface + SABI_IFACE_DATA + 3); - goto exit; - } - - /* Something bad happened, so report it and error out */ - printk(KERN_WARNING "SABI command 0x%02x failed with completion flag 0x%02x and output 0x%02x\n", - command, readb(sabi_iface + SABI_IFACE_COMPLETE), - readb(sabi_iface + SABI_IFACE_DATA)); - retval = -EINVAL; -exit: - mutex_unlock(&sabi_mutex); - return retval; - -} - -static int sabi_set_command(u8 command, u8 data) -{ - int retval = 0; - u16 port = readw(sabi + SABI_HEADER_PORT); - - mutex_lock(&sabi_mutex); - - /* enable memory to be able to write to it */ - outb(readb(sabi + SABI_HEADER_EN_MEM), port); - - /* write out the command */ - writew(MAIN_FUNCTION, sabi_iface + SABI_IFACE_MAIN); - writew(command, sabi_iface + SABI_IFACE_SUB); - writeb(0, sabi_iface + SABI_IFACE_COMPLETE); - writeb(data, sabi_iface + SABI_IFACE_DATA); - outb(readb(sabi + SABI_HEADER_IFACEFUNC), port); - - /* write protect memory to make it safe */ - outb(readb(sabi + SABI_HEADER_RE_MEM), port); - - /* see if the command actually succeeded */ - if (readb(sabi_iface + SABI_IFACE_COMPLETE) == 0xaa && - readb(sabi_iface + SABI_IFACE_DATA) != 0xff) { - /* it did! */ - goto exit; - } - - /* Something bad happened, so report it and error out */ - printk(KERN_WARNING "SABI command 0x%02x failed with completion flag 0x%02x and output 0x%02x\n", - command, readb(sabi_iface + SABI_IFACE_COMPLETE), - readb(sabi_iface + SABI_IFACE_DATA)); - retval = -EINVAL; -exit: - mutex_unlock(&sabi_mutex); - return retval; -} - -static void test_backlight(void) -{ - struct sabi_retval sretval; - - sabi_get_command(GET_BACKLIGHT, &sretval); - printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]); - - sabi_set_command(SET_BACKLIGHT, 0); - printk(KERN_DEBUG "backlight should be off\n"); - - sabi_get_command(GET_BACKLIGHT, &sretval); - printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]); - - msleep(1000); - - sabi_set_command(SET_BACKLIGHT, 1); - printk(KERN_DEBUG "backlight should be on\n"); - - sabi_get_command(GET_BACKLIGHT, &sretval); - printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]); -} - -static void test_wireless(void) -{ - struct sabi_retval sretval; - - sabi_get_command(GET_WIRELESS_BUTTON, &sretval); - printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]); - - sabi_set_command(SET_WIRELESS_BUTTON, 0); - printk(KERN_DEBUG "wireless led should be off\n"); - - sabi_get_command(GET_WIRELESS_BUTTON, &sretval); - printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]); - - msleep(1000); - - sabi_set_command(SET_WIRELESS_BUTTON, 1); - printk(KERN_DEBUG "wireless led should be on\n"); - - sabi_get_command(GET_WIRELESS_BUTTON, &sretval); - printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]); -} - -static u8 read_brightness(void) -{ - struct sabi_retval sretval; - int user_brightness = 0; - int retval; - - retval = sabi_get_command(GET_BRIGHTNESS, &sretval); - if (!retval) - user_brightness = sretval.retval[0]; - if (user_brightness != 0) - --user_brightness; - return user_brightness; -} - -static void set_brightness(u8 user_brightness) -{ - sabi_set_command(SET_BRIGHTNESS, user_brightness + 1); -} - -static int get_brightness(struct backlight_device *bd) -{ - return (int)read_brightness(); -} - -static int update_status(struct backlight_device *bd) -{ - set_brightness(bd->props.brightness); - - if (bd->props.power == FB_BLANK_UNBLANK) - sabi_set_command(SET_BACKLIGHT, 1); - else - sabi_set_command(SET_BACKLIGHT, 0); - return 0; -} - -static const struct backlight_ops backlight_ops = { - .get_brightness = get_brightness, - .update_status = update_status, -}; - -static int rfkill_set(void *data, bool blocked) -{ - /* Do something with blocked...*/ - /* - * blocked == false is on - * blocked == true is off - */ - if (blocked) - sabi_set_command(SET_WIRELESS_BUTTON, 0); - else - sabi_set_command(SET_WIRELESS_BUTTON, 1); - - return 0; -} - -static struct rfkill_ops rfkill_ops = { - .set_block = rfkill_set, -}; - -static int init_wireless(struct platform_device *sdev) -{ - int retval; - - rfk = rfkill_alloc("samsung-wifi", &sdev->dev, RFKILL_TYPE_WLAN, - &rfkill_ops, NULL); - if (!rfk) - return -ENOMEM; - - retval = rfkill_register(rfk); - if (retval) { - rfkill_destroy(rfk); - return -ENODEV; - } - - return 0; -} - -static void destroy_wireless(void) -{ - rfkill_unregister(rfk); - rfkill_destroy(rfk); -} - -static ssize_t get_silent_state(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct sabi_retval sretval; - int retval; - - /* Read the state */ - retval = sabi_get_command(GET_PERFORMANCE_LEVEL, &sretval); - if (retval) - return retval; - - /* The logic is backwards, yeah, lots of fun... */ - if (sretval.retval[0] == 0) - retval = 1; - else - retval = 0; - return sprintf(buf, "%d\n", retval); -} - -static ssize_t set_silent_state(struct device *dev, - struct device_attribute *attr, const char *buf, - size_t count) -{ - char value; - - if (count >= 1) { - value = buf[0]; - if ((value == '0') || (value == 'n') || (value == 'N')) { - /* Turn speed up */ - sabi_set_command(SET_PERFORMANCE_LEVEL, 0x01); - } else if ((value == '1') || (value == 'y') || (value == 'Y')) { - /* Turn speed down */ - sabi_set_command(SET_PERFORMANCE_LEVEL, 0x00); - } else { - return -EINVAL; - } - } - return count; -} -static DEVICE_ATTR(silent, S_IWUSR | S_IRUGO, - get_silent_state, set_silent_state); - - -static int __init dmi_check_cb(const struct dmi_system_id *id) -{ - printk(KERN_INFO KBUILD_MODNAME ": found laptop model '%s'\n", - id->ident); - return 0; -} - -static struct dmi_system_id __initdata samsung_dmi_table[] = { - { - .ident = "N128", - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, - "SAMSUNG ELECTRONICS CO., LTD."), - DMI_MATCH(DMI_PRODUCT_NAME, "N128"), - DMI_MATCH(DMI_BOARD_NAME, "N128"), - }, - .callback = dmi_check_cb, - }, - { - .ident = "N130", - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, - "SAMSUNG ELECTRONICS CO., LTD."), - DMI_MATCH(DMI_PRODUCT_NAME, "N130"), - DMI_MATCH(DMI_BOARD_NAME, "N130"), - }, - .callback = dmi_check_cb, - }, - { }, -}; -MODULE_DEVICE_TABLE(dmi, samsung_dmi_table); - -static int __init samsung_init(void) -{ - struct backlight_properties props; - struct sabi_retval sretval; - const char *testStr = "SECLINUX"; - void __iomem *memcheck; - unsigned int ifaceP; - int pStr; - int loca; - int retval; - - mutex_init(&sabi_mutex); - - if (!force && !dmi_check_system(samsung_dmi_table)) - return -ENODEV; - - f0000_segment = ioremap(0xf0000, 0xffff); - if (!f0000_segment) { - printk(KERN_ERR "Can't map the segment at 0xf0000\n"); - return -EINVAL; - } - - /* Try to find the signature "SECLINUX" in memory to find the header */ - pStr = 0; - memcheck = f0000_segment; - for (loca = 0; loca < 0xffff; loca++) { - char temp = readb(memcheck + loca); - - if (temp == testStr[pStr]) { - if (pStr == strlen(testStr)-1) - break; - ++pStr; - } else { - pStr = 0; - } - } - if (loca == 0xffff) { - printk(KERN_ERR "This computer does not support SABI\n"); - goto error_no_signature; - } - - /* point to the SMI port Number */ - loca += 1; - sabi = (memcheck + loca); - - if (debug) { - printk(KERN_DEBUG "This computer supports SABI==%x\n", - loca + 0xf0000 - 6); - printk(KERN_DEBUG "SABI header:\n"); - printk(KERN_DEBUG " SMI Port Number = 0x%04x\n", - readw(sabi + SABI_HEADER_PORT)); - printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n", - readb(sabi + SABI_HEADER_IFACEFUNC)); - printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n", - readb(sabi + SABI_HEADER_EN_MEM)); - printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n", - readb(sabi + SABI_HEADER_RE_MEM)); - printk(KERN_DEBUG " SABI data offset = 0x%04x\n", - readw(sabi + SABI_HEADER_DATA_OFFSET)); - printk(KERN_DEBUG " SABI data segment = 0x%04x\n", - readw(sabi + SABI_HEADER_DATA_SEGMENT)); - } - - /* Get a pointer to the SABI Interface */ - ifaceP = (readw(sabi + SABI_HEADER_DATA_SEGMENT) & 0x0ffff) << 4; - ifaceP += readw(sabi + SABI_HEADER_DATA_OFFSET) & 0x0ffff; - sabi_iface = ioremap(ifaceP, 16); - if (!sabi_iface) { - printk(KERN_ERR "Can't remap %x\n", ifaceP); - goto exit; - } - if (debug) { - printk(KERN_DEBUG "ifaceP = 0x%08x\n", ifaceP); - printk(KERN_DEBUG "sabi_iface = %p\n", sabi_iface); - - test_backlight(); - test_wireless(); - - retval = sabi_get_command(GET_BRIGHTNESS, &sretval); - printk(KERN_DEBUG "brightness = 0x%02x\n", sretval.retval[0]); - } - - /* Turn on "Linux" mode in the BIOS */ - retval = sabi_set_command(SET_LINUX, 0x81); - if (retval) { - printk(KERN_ERR KBUILD_MODNAME ": Linux mode was not set!\n"); - goto error_no_platform; - } - - /* knock up a platform device to hang stuff off of */ - sdev = platform_device_register_simple("samsung", -1, NULL, 0); - if (IS_ERR(sdev)) - goto error_no_platform; - - /* create a backlight device to talk to this one */ - memset(&props, 0, sizeof(struct backlight_properties)); - props.max_brightness = MAX_BRIGHT; - backlight_device = backlight_device_register("samsung", &sdev->dev, - NULL, &backlight_ops, - &props); - if (IS_ERR(backlight_device)) - goto error_no_backlight; - - backlight_device->props.brightness = read_brightness(); - backlight_device->props.power = FB_BLANK_UNBLANK; - backlight_update_status(backlight_device); - - retval = init_wireless(sdev); - if (retval) - goto error_no_rfk; - - retval = device_create_file(&sdev->dev, &dev_attr_silent); - if (retval) - goto error_file_create; - -exit: - return 0; - -error_file_create: - destroy_wireless(); - -error_no_rfk: - backlight_device_unregister(backlight_device); - -error_no_backlight: - platform_device_unregister(sdev); - -error_no_platform: - iounmap(sabi_iface); - -error_no_signature: - iounmap(f0000_segment); - return -EINVAL; -} - -static void __exit samsung_exit(void) -{ - /* Turn off "Linux" mode in the BIOS */ - sabi_set_command(SET_LINUX, 0x80); - - device_remove_file(&sdev->dev, &dev_attr_silent); - backlight_device_unregister(backlight_device); - destroy_wireless(); - iounmap(sabi_iface); - iounmap(f0000_segment); - platform_device_unregister(sdev); -} - -module_init(samsung_init); -module_exit(samsung_exit); - -MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>"); -MODULE_DESCRIPTION("Samsung Backlight driver"); -MODULE_LICENSE("GPL"); |