diff options
| -rw-r--r-- | drivers/staging/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/staging/Makefile | 1 | ||||
| -rw-r--r-- | drivers/staging/samsung-laptop/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/staging/samsung-laptop/Makefile | 1 | ||||
| -rw-r--r-- | drivers/staging/samsung-laptop/samsung-laptop.c | 582 |
5 files changed, 596 insertions, 0 deletions
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig index d30fa45..a44ac2e 100644 --- a/drivers/staging/Kconfig +++ b/drivers/staging/Kconfig @@ -131,6 +131,8 @@ source "drivers/staging/wlags49_h25/Kconfig" source "drivers/staging/batman-adv/Kconfig" +source "drivers/staging/samsung-laptop/Kconfig" + source "drivers/staging/strip/Kconfig" source "drivers/staging/arlan/Kconfig" diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile index 910e55d..069864f 100644 --- a/drivers/staging/Makefile +++ b/drivers/staging/Makefile @@ -47,6 +47,7 @@ obj-$(CONFIG_RAMZSWAP) += ramzswap/ obj-$(CONFIG_WLAGS49_H2) += wlags49_h2/ obj-$(CONFIG_WLAGS49_H25) += wlags49_h25/ obj-$(CONFIG_BATMAN_ADV) += batman-adv/ +obj-$(CONFIG_SAMSUNG_LAPTOP) += samsung-laptop/ obj-$(CONFIG_STRIP) += strip/ obj-$(CONFIG_ARLAN) += arlan/ obj-$(CONFIG_WAVELAN) += wavelan/ diff --git a/drivers/staging/samsung-laptop/Kconfig b/drivers/staging/samsung-laptop/Kconfig new file mode 100644 index 0000000..f27c608 --- /dev/null +++ b/drivers/staging/samsung-laptop/Kconfig @@ -0,0 +1,10 @@ +config SAMSUNG_LAPTOP + tristate "Samsung Laptop driver" + default n + depends on RFKILL && BACKLIGHT_CLASS_DEVICE && X86 + help + This module implements a driver for the N128 Samsung Laptop + providing control over the Wireless LED and the LCD backlight + + To compile this driver as a module, choose + M here: the module will be called samsung-laptop. diff --git a/drivers/staging/samsung-laptop/Makefile b/drivers/staging/samsung-laptop/Makefile new file mode 100644 index 0000000..3c6f420 --- /dev/null +++ b/drivers/staging/samsung-laptop/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_SAMSUNG_LAPTOP) += samsung-laptop.o diff --git a/drivers/staging/samsung-laptop/samsung-laptop.c b/drivers/staging/samsung-laptop/samsung-laptop.c new file mode 100644 index 0000000..253b447 --- /dev/null +++ b/drivers/staging/samsung-laptop/samsung-laptop.c @@ -0,0 +1,582 @@ +/* + * 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/version.h> +#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 struct backlight_ops backlight_ops = { + .get_brightness = get_brightness, + .update_status = update_status, +}; + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31) +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); +} + +#else + +static int rfkill_set(void *data, enum rfkill_state state) +{ + if (state == RFKILL_STATE_UNBLOCKED) + sabi_set_command(SET_WIRELESS_BUTTON, 1); + else + sabi_set_command(SET_WIRELESS_BUTTON, 0); + + return 0; +} + +static int init_wireless(struct platform_device *sdev) +{ + int retval; + + rfk = rfkill_allocate(&sdev->dev, RFKILL_TYPE_WLAN); + if (!rfk) + return -ENOMEM; + rfk->toggle_radio = rfkill_set; + rfk->name = "samsung-wifi"; + + retval = rfkill_register(rfk); + if (retval) { + rfkill_free(rfk); + return -ENODEV; + } + + return 0; +} + +static void destroy_wireless(void) +{ + rfkill_unregister(rfk); +} + +#endif + +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_IWUGO | 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 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 */ + backlight_device = backlight_device_register("samsung", &sdev->dev, + NULL, &backlight_ops); + if (IS_ERR(backlight_device)) + goto error_no_backlight; + + backlight_device->props.max_brightness = MAX_BRIGHT; + 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"); |