From: Ingmar Steen <iksteen@xxxxxxxxx>
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 <iksteen@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/staging/samsung-laptop/samsung-laptop.c | 392 +++++++++++++++--------
1 files changed, 265 insertions(+), 127 deletions(-)
diff --git a/drivers/staging/samsung-laptop/samsung-laptop.c b/drivers/staging/samsung-laptop/samsung-laptop.c
index 701e8d5..4b7525f 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);
--
1.7.4.1
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