From 988a29bf3dfb2bb9a85c21987e2cc63dadf523c3 Mon Sep 17 00:00:00 2001 From: Ingmar Steen Date: Mon, 7 Feb 2011 14:32:31 +0100 Subject: [PATCH] staging: samsung-laptop: Extend samsung-laptop platform driver to support another flavor of its platform BIOS. There are currently two implementations of the Samsung BIOS that controls the rfkill switch, backlight brightness / power and performance level. The samsung-laptop driver implements the BIOS flavor with the SECLINUX signature, this patch implements talking to the other BIOS with 'SwSmi@' signature. Both expose very similar functionality and way of accessing the commands. The differences are mostly offsets, command identifiers and some values. This patch introduces a sabi_config structure that contains information on identifying and accessing specific SABI flavors. Signed-off-by: Ingmar Steen Signed-off-by: Greg Kroah-Hartman --- .../staging/samsung-laptop/samsung-laptop.c | 392 ++++++++++++------ 1 file changed, 265 insertions(+), 127 deletions(-) diff --git a/drivers/staging/samsung-laptop/samsung-laptop.c b/drivers/staging/samsung-laptop/samsung-laptop.c index 701e8d52a9fa..4b7525fa02b2 100644 --- a/drivers/staging/samsung-laptop/samsung-laptop.c +++ b/drivers/staging/samsung-laptop/samsung-laptop.c @@ -33,51 +33,6 @@ */ #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 @@ -89,6 +44,169 @@ struct sabi_retval { u8 retval[20]; }; +struct sabi_header_offsets { + u8 port; + u8 re_mem; + u8 iface_func; + u8 en_mem; + u8 data_offset; + u8 data_segment; +}; + +struct sabi_commands { + /* Brightness is 0 - 8, as described above. Value 0 is for the BIOS to use */ + u8 get_brightness; + u8 set_brightness; + + /* 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... + */ + u8 get_wireless_button; + u8 set_wireless_button; + + /* 0 is off, 1 is on */ + u8 get_backlight; + u8 set_backlight; + + /* + * 0x80 or 0x00 - no action + * 0x81 - recovery key pressed + */ + u8 get_recovery_mode; + u8 set_recovery_mode; + + /* + * on seclinux: 0 is low, 1 is high, + * on swsmi: 0 is normal, 1 is silent, 2 is turbo + */ + u8 get_performance_level; + u8 set_performance_level; + + /* + * Tell the BIOS that Linux is running on this machine. + * 81 is on, 80 is off + */ + u8 set_linux; +}; + +struct sabi_performance_level { + const char *name; + u8 value; +}; + +struct sabi_config { + const char *test_string; + u16 main_function; + struct sabi_header_offsets header_offsets; + struct sabi_commands commands; + struct sabi_performance_level performance_levels[4]; +}; + +static struct sabi_config sabi_configs[] = { + { + test_string: "SECLINUX", + + main_function: 0x4c59, + + header_offsets: { + port: 0x00, + re_mem: 0x02, + iface_func: 0x03, + en_mem: 0x04, + data_offset: 0x05, + data_segment: 0x07, + }, + + commands: { + get_brightness: 0x00, + set_brightness: 0x01, + + get_wireless_button: 0x02, + set_wireless_button: 0x03, + + get_backlight: 0x04, + set_backlight: 0x05, + + get_recovery_mode: 0x06, + set_recovery_mode: 0x07, + + get_performance_level: 0x08, + set_performance_level: 0x09, + + set_linux: 0x0a, + }, + + performance_levels: { + { + name: "silent", + value: 0, + }, + { + name: "normal", + value: 1, + }, + { }, + }, + }, + { + test_string: "SwSmi@", + + main_function: 0x5843, + + header_offsets: { + port: 0x00, + re_mem: 0x04, + iface_func: 0x02, + en_mem: 0x03, + data_offset: 0x05, + data_segment: 0x07, + }, + + commands: { + get_brightness: 0x10, + set_brightness: 0x11, + + get_wireless_button: 0x12, + set_wireless_button: 0x13, + + get_backlight: 0x2d, + set_backlight: 0x2e, + + get_recovery_mode: 0xff, + set_recovery_mode: 0xff, + + get_performance_level: 0x31, + set_performance_level: 0x32, + + set_linux: 0xff, + }, + + performance_levels: { + { + name: "normal", + value: 0, + }, + { + name: "silent", + value: 1, + }, + { + name: "overclock", + value: 2, + }, + { }, + }, + }, + { }, +}; + +static struct sabi_config *sabi_config; + static void __iomem *sabi; static void __iomem *sabi_iface; static void __iomem *f0000_segment; @@ -109,21 +227,21 @@ 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); + u16 port = readw(sabi + sabi_config->header_offsets.port); mutex_lock(&sabi_mutex); /* enable memory to be able to write to it */ - outb(readb(sabi + SABI_HEADER_EN_MEM), port); + outb(readb(sabi + sabi_config->header_offsets.en_mem), port); /* write out the command */ - writew(MAIN_FUNCTION, sabi_iface + SABI_IFACE_MAIN); + writew(sabi_config->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); + outb(readb(sabi + sabi_config->header_offsets.iface_func), port); /* write protect memory to make it safe */ - outb(readb(sabi + SABI_HEADER_RE_MEM), port); + outb(readb(sabi + sabi_config->header_offsets.re_mem), port); /* see if the command actually succeeded */ if (readb(sabi_iface + SABI_IFACE_COMPLETE) == 0xaa && @@ -156,22 +274,22 @@ exit: static int sabi_set_command(u8 command, u8 data) { int retval = 0; - u16 port = readw(sabi + SABI_HEADER_PORT); + u16 port = readw(sabi + sabi_config->header_offsets.port); mutex_lock(&sabi_mutex); /* enable memory to be able to write to it */ - outb(readb(sabi + SABI_HEADER_EN_MEM), port); + outb(readb(sabi + sabi_config->header_offsets.en_mem), port); /* write out the command */ - writew(MAIN_FUNCTION, sabi_iface + SABI_IFACE_MAIN); + writew(sabi_config->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); + outb(readb(sabi + sabi_config->header_offsets.iface_func), port); /* write protect memory to make it safe */ - outb(readb(sabi + SABI_HEADER_RE_MEM), port); + outb(readb(sabi + sabi_config->header_offsets.re_mem), port); /* see if the command actually succeeded */ if (readb(sabi_iface + SABI_IFACE_COMPLETE) == 0xaa && @@ -194,21 +312,21 @@ static void test_backlight(void) { struct sabi_retval sretval; - sabi_get_command(GET_BACKLIGHT, &sretval); + sabi_get_command(sabi_config->commands.get_backlight, &sretval); printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]); - sabi_set_command(SET_BACKLIGHT, 0); + sabi_set_command(sabi_config->commands.set_backlight, 0); printk(KERN_DEBUG "backlight should be off\n"); - sabi_get_command(GET_BACKLIGHT, &sretval); + sabi_get_command(sabi_config->commands.get_backlight, &sretval); printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]); msleep(1000); - sabi_set_command(SET_BACKLIGHT, 1); + sabi_set_command(sabi_config->commands.set_backlight, 1); printk(KERN_DEBUG "backlight should be on\n"); - sabi_get_command(GET_BACKLIGHT, &sretval); + sabi_get_command(sabi_config->commands.get_backlight, &sretval); printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]); } @@ -216,21 +334,21 @@ static void test_wireless(void) { struct sabi_retval sretval; - sabi_get_command(GET_WIRELESS_BUTTON, &sretval); + sabi_get_command(sabi_config->commands.get_wireless_button, &sretval); printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]); - sabi_set_command(SET_WIRELESS_BUTTON, 0); + sabi_set_command(sabi_config->commands.set_wireless_button, 0); printk(KERN_DEBUG "wireless led should be off\n"); - sabi_get_command(GET_WIRELESS_BUTTON, &sretval); + sabi_get_command(sabi_config->commands.get_wireless_button, &sretval); printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]); msleep(1000); - sabi_set_command(SET_WIRELESS_BUTTON, 1); + sabi_set_command(sabi_config->commands.set_wireless_button, 1); printk(KERN_DEBUG "wireless led should be on\n"); - sabi_get_command(GET_WIRELESS_BUTTON, &sretval); + sabi_get_command(sabi_config->commands.get_wireless_button, &sretval); printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]); } @@ -240,7 +358,7 @@ static u8 read_brightness(void) int user_brightness = 0; int retval; - retval = sabi_get_command(GET_BRIGHTNESS, &sretval); + retval = sabi_get_command(sabi_config->commands.get_brightness, &sretval); if (!retval) user_brightness = sretval.retval[0]; if (user_brightness != 0) @@ -250,7 +368,7 @@ static u8 read_brightness(void) static void set_brightness(u8 user_brightness) { - sabi_set_command(SET_BRIGHTNESS, user_brightness + 1); + sabi_set_command(sabi_config->commands.set_brightness, user_brightness + 1); } static int get_brightness(struct backlight_device *bd) @@ -263,9 +381,9 @@ 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); + sabi_set_command(sabi_config->commands.set_backlight, 1); else - sabi_set_command(SET_BACKLIGHT, 0); + sabi_set_command(sabi_config->commands.set_backlight, 0); return 0; } @@ -282,9 +400,9 @@ static int rfkill_set(void *data, bool blocked) * blocked == true is off */ if (blocked) - sabi_set_command(SET_WIRELESS_BUTTON, 0); + sabi_set_command(sabi_config->commands.set_wireless_button, 0); else - sabi_set_command(SET_WIRELESS_BUTTON, 1); + sabi_set_command(sabi_config->commands.set_wireless_button, 1); return 0; } @@ -317,47 +435,51 @@ static void destroy_wireless(void) rfkill_destroy(rfk); } -static ssize_t get_silent_state(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t get_performance_level(struct device *dev, + struct device_attribute *attr, char *buf) { struct sabi_retval sretval; int retval; + int pLevel; /* Read the state */ - retval = sabi_get_command(GET_PERFORMANCE_LEVEL, &sretval); + retval = sabi_get_command(sabi_config->commands.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); + for (pLevel = 0; sabi_config->performance_levels[pLevel].name; ++pLevel) + { + if (sretval.retval[0] == sabi_config->performance_levels[pLevel].value) + return sprintf(buf, "%s\n", sabi_config->performance_levels[pLevel].name); + } + return sprintf(buf, "%s\n", "unknown"); } -static ssize_t set_silent_state(struct device *dev, +static ssize_t set_performance_level(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; + int pLevel; + for (pLevel = 0; sabi_config->performance_levels[pLevel].name; ++pLevel) + { + struct sabi_performance_level *level = + &sabi_config->performance_levels[pLevel]; + if (!strncasecmp(level->name, buf, strlen(level->name))) + { + sabi_set_command(sabi_config->commands.set_performance_level, + level->value); + break; + } } + if (!sabi_config->performance_levels[pLevel].name) + return -EINVAL; } return count; } -static DEVICE_ATTR(silent, S_IWUSR | S_IRUGO, - get_silent_state, set_silent_state); +static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO, + get_performance_level, set_performance_level); static int __init dmi_check_cb(const struct dmi_system_id *id) @@ -392,14 +514,31 @@ static struct dmi_system_id __initdata samsung_dmi_table[] = { }; MODULE_DEVICE_TABLE(dmi, samsung_dmi_table); +static int find_signature(void __iomem *memcheck, const char *testStr) +{ + int pStr; + int loca; + pStr = 0; + 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; + } + } + return loca; +} + 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 pConfig; int loca; int retval; @@ -414,50 +553,45 @@ static int __init samsung_init(void) 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; - } + /* Try to find one of the signatures in memory to find the header */ + for (pConfig = 0; sabi_configs[pConfig].test_string != 0; ++pConfig) + { + sabi_config = &sabi_configs[pConfig]; + loca = find_signature(f0000_segment, sabi_config->test_string); + if (loca != 0xffff) + break; } + 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); + sabi = (f0000_segment + 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)); + readw(sabi + sabi_config->header_offsets.port)); printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n", - readb(sabi + SABI_HEADER_IFACEFUNC)); + readb(sabi + sabi_config->header_offsets.iface_func)); printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n", - readb(sabi + SABI_HEADER_EN_MEM)); + readb(sabi + sabi_config->header_offsets.en_mem)); printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n", - readb(sabi + SABI_HEADER_RE_MEM)); + readb(sabi + sabi_config->header_offsets.re_mem)); printk(KERN_DEBUG " SABI data offset = 0x%04x\n", - readw(sabi + SABI_HEADER_DATA_OFFSET)); + readw(sabi + sabi_config->header_offsets.data_offset)); printk(KERN_DEBUG " SABI data segment = 0x%04x\n", - readw(sabi + SABI_HEADER_DATA_SEGMENT)); + readw(sabi + sabi_config->header_offsets.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; + ifaceP = (readw(sabi + sabi_config->header_offsets.data_segment) & 0x0ffff) << 4; + ifaceP += readw(sabi + sabi_config->header_offsets.data_offset) & 0x0ffff; sabi_iface = ioremap(ifaceP, 16); if (!sabi_iface) { printk(KERN_ERR "Can't remap %x\n", ifaceP); @@ -470,15 +604,18 @@ static int __init samsung_init(void) test_backlight(); test_wireless(); - retval = sabi_get_command(GET_BRIGHTNESS, &sretval); + retval = sabi_get_command(sabi_config->commands.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; + if (sabi_config->commands.set_linux != 0xff) + { + retval = sabi_set_command(sabi_config->commands.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 */ @@ -503,7 +640,7 @@ static int __init samsung_init(void) if (retval) goto error_no_rfk; - retval = device_create_file(&sdev->dev, &dev_attr_silent); + retval = device_create_file(&sdev->dev, &dev_attr_performance_level); if (retval) goto error_file_create; @@ -530,9 +667,10 @@ error_no_signature: static void __exit samsung_exit(void) { /* Turn off "Linux" mode in the BIOS */ - sabi_set_command(SET_LINUX, 0x80); + if (sabi_config->commands.set_linux != 0xff) + sabi_set_command(sabi_config->commands.set_linux, 0x80); - device_remove_file(&sdev->dev, &dev_attr_silent); + device_remove_file(&sdev->dev, &dev_attr_performance_level); backlight_device_unregister(backlight_device); destroy_wireless(); iounmap(sabi_iface); -- 2.34.1