From 7e9607118b08bd4e1dae65d56e425e8de7f3da1c Mon Sep 17 00:00:00 2001 From: Corentin Chary Date: Sat, 26 Nov 2011 11:00:02 +0100 Subject: samsung-laptop: ehance SABI support * SABI command are on 16 bits, not 8 * SABI can read/write up to 11 byte of data * There is not real difference between "get" and "set" commands, so refactorise the code of both functions Signed-off-by: Corentin Chary Acked-by: Greg Kroah-Hartman Signed-off-by: Matthew Garrett --- drivers/platform/x86/samsung-laptop.c | 225 +++++++++++++++++----------------- 1 file changed, 113 insertions(+), 112 deletions(-) (limited to 'drivers/platform/x86/samsung-laptop.c') diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c index 9fbf5c0d3646..134444f176e6 100644 --- a/drivers/platform/x86/samsung-laptop.c +++ b/drivers/platform/x86/samsung-laptop.c @@ -42,9 +42,17 @@ #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]; +/* Structure get/set data using sabi */ +struct sabi_data { + union { + struct { + u32 d0; + u32 d1; + u16 d2; + u8 d3; + }; + u8 data[11]; + }; }; struct sabi_header_offsets { @@ -61,8 +69,8 @@ struct sabi_commands { * Brightness is 0 - 8, as described above. * Value 0 is for the BIOS to use */ - u8 get_brightness; - u8 set_brightness; + u16 get_brightness; + u16 set_brightness; /* * first byte: @@ -73,37 +81,37 @@ struct sabi_commands { * 0x03 - 3G is on * TODO, verify 3G is correct, that doesn't seem right... */ - u8 get_wireless_button; - u8 set_wireless_button; + u16 get_wireless_button; + u16 set_wireless_button; /* 0 is off, 1 is on */ - u8 get_backlight; - u8 set_backlight; + u16 get_backlight; + u16 set_backlight; /* * 0x80 or 0x00 - no action * 0x81 - recovery key pressed */ - u8 get_recovery_mode; - u8 set_recovery_mode; + u16 get_recovery_mode; + u16 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; + u16 get_performance_level; + u16 set_performance_level; /* * Tell the BIOS that Linux is running on this machine. * 81 is on, 80 is off */ - u8 set_linux; + u16 set_linux; }; struct sabi_performance_level { const char *name; - u8 value; + u16 value; }; struct sabi_config { @@ -246,16 +254,25 @@ static bool debug; module_param(debug, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Debug enabled or not"); -static int sabi_get_command(struct samsung_laptop *samsung, - u8 command, struct sabi_retval *sretval) +static int sabi_command(struct samsung_laptop *samsung, u16 command, + struct sabi_data *in, + struct sabi_data *out) { const struct sabi_config *config = samsung->config; - int retval = 0; + int ret = 0; u16 port = readw(samsung->sabi + config->header_offsets.port); u8 complete, iface_data; mutex_lock(&samsung->sabi_mutex); + if (debug) { + if (in) + pr_info("SABI 0x%04x {0x%08x, 0x%08x, 0x%04x, 0x%02x}", + command, in->d0, in->d1, in->d2, in->d3); + else + pr_info("SABI 0x%04x", command); + } + /* enable memory to be able to write to it */ outb(readb(samsung->sabi + config->header_offsets.en_mem), port); @@ -263,6 +280,12 @@ static int sabi_get_command(struct samsung_laptop *samsung, writew(config->main_function, samsung->sabi_iface + SABI_IFACE_MAIN); writew(command, samsung->sabi_iface + SABI_IFACE_SUB); writeb(0, samsung->sabi_iface + SABI_IFACE_COMPLETE); + if (in) { + writel(in->d0, samsung->sabi_iface + SABI_IFACE_DATA); + writel(in->d1, samsung->sabi_iface + SABI_IFACE_DATA + 4); + writew(in->d2, samsung->sabi_iface + SABI_IFACE_DATA + 8); + writeb(in->d3, samsung->sabi_iface + SABI_IFACE_DATA + 10); + } outb(readb(samsung->sabi + config->header_offsets.iface_func), port); /* write protect memory to make it safe */ @@ -272,127 +295,105 @@ static int sabi_get_command(struct samsung_laptop *samsung, complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE); iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA); if (complete != 0xaa || iface_data == 0xff) { - pr_warn("SABI get command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n", - command, complete, iface_data); - retval = -EINVAL; + pr_warn("SABI command 0x%04x failed with" + " completion flag 0x%02x and interface data 0x%02x", + command, complete, iface_data); + ret = -EINVAL; goto exit; } - /* - * Save off the data into a structure so the caller use it. - * Right now we only want the first 4 bytes, - * There are commands that need more, but not for the ones we - * currently care about. - */ - sretval->retval[0] = readb(samsung->sabi_iface + SABI_IFACE_DATA); - sretval->retval[1] = readb(samsung->sabi_iface + SABI_IFACE_DATA + 1); - sretval->retval[2] = readb(samsung->sabi_iface + SABI_IFACE_DATA + 2); - sretval->retval[3] = readb(samsung->sabi_iface + SABI_IFACE_DATA + 3); + + if (out) { + out->d0 = readl(samsung->sabi_iface + SABI_IFACE_DATA); + out->d1 = readl(samsung->sabi_iface + SABI_IFACE_DATA + 4); + out->d2 = readw(samsung->sabi_iface + SABI_IFACE_DATA + 2); + out->d3 = readb(samsung->sabi_iface + SABI_IFACE_DATA + 1); + } + + if (debug && out) { + pr_info("SABI {0x%08x, 0x%08x, 0x%04x, 0x%02x}", + out->d0, out->d1, out->d2, out->d3); + } exit: mutex_unlock(&samsung->sabi_mutex); - return retval; - + return ret; } -static int sabi_set_command(struct samsung_laptop *samsung, - u8 command, u8 data) +/* simple wrappers usable with most commands */ +static int sabi_set_commandb(struct samsung_laptop *samsung, + u16 command, u8 data) { - const struct sabi_config *config = samsung->config; - int retval = 0; - u16 port = readw(samsung->sabi + config->header_offsets.port); - u8 complete, iface_data; + struct sabi_data in = { .d0 = 0, .d1 = 0, .d2 = 0, .d3 = 0 }; - mutex_lock(&samsung->sabi_mutex); - - /* enable memory to be able to write to it */ - outb(readb(samsung->sabi + config->header_offsets.en_mem), port); - - /* write out the command */ - writew(config->main_function, samsung->sabi_iface + SABI_IFACE_MAIN); - writew(command, samsung->sabi_iface + SABI_IFACE_SUB); - writeb(0, samsung->sabi_iface + SABI_IFACE_COMPLETE); - writeb(data, samsung->sabi_iface + SABI_IFACE_DATA); - outb(readb(samsung->sabi + config->header_offsets.iface_func), port); - - /* write protect memory to make it safe */ - outb(readb(samsung->sabi + config->header_offsets.re_mem), port); - - /* see if the command actually succeeded */ - complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE); - iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA); - if (complete != 0xaa || iface_data == 0xff) { - pr_warn("SABI set command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n", - command, complete, iface_data); - retval = -EINVAL; - } - - mutex_unlock(&samsung->sabi_mutex); - return retval; + in.data[0] = data; + return sabi_command(samsung, command, &in, NULL); } static void test_backlight(struct samsung_laptop *samsung) { const struct sabi_commands *commands = &samsung->config->commands; - struct sabi_retval sretval; + struct sabi_data sretval; - sabi_get_command(samsung, commands->get_backlight, &sretval); - printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]); + sabi_command(samsung, commands->get_backlight, NULL, &sretval); + printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.data[0]); - sabi_set_command(samsung, commands->set_backlight, 0); + sabi_set_commandb(samsung, commands->set_backlight, 0); printk(KERN_DEBUG "backlight should be off\n"); - sabi_get_command(samsung, commands->get_backlight, &sretval); - printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]); + sabi_command(samsung, commands->get_backlight, NULL, &sretval); + printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.data[0]); msleep(1000); - sabi_set_command(samsung, commands->set_backlight, 1); + sabi_set_commandb(samsung, commands->set_backlight, 1); printk(KERN_DEBUG "backlight should be on\n"); - sabi_get_command(samsung, commands->get_backlight, &sretval); - printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]); + sabi_command(samsung, commands->get_backlight, NULL, &sretval); + printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.data[0]); } static void test_wireless(struct samsung_laptop *samsung) { const struct sabi_commands *commands = &samsung->config->commands; - struct sabi_retval sretval; + struct sabi_data sretval; - sabi_get_command(samsung, commands->get_wireless_button, &sretval); - printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]); + sabi_command(samsung, commands->get_wireless_button, NULL, &sretval); + printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.data[0]); - sabi_set_command(samsung, commands->set_wireless_button, 0); + sabi_set_commandb(samsung, commands->set_wireless_button, 0); printk(KERN_DEBUG "wireless led should be off\n"); - sabi_get_command(samsung, commands->get_wireless_button, &sretval); - printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]); + sabi_command(samsung, commands->get_wireless_button, NULL, &sretval); + printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.data[0]); msleep(1000); - sabi_set_command(samsung, commands->set_wireless_button, 1); + sabi_set_commandb(samsung, commands->set_wireless_button, 1); printk(KERN_DEBUG "wireless led should be on\n"); - sabi_get_command(samsung, commands->get_wireless_button, &sretval); - printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]); + sabi_command(samsung, commands->get_wireless_button, NULL, &sretval); + printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.data[0]); } static int read_brightness(struct samsung_laptop *samsung) { const struct sabi_config *config = samsung->config; const struct sabi_commands *commands = &samsung->config->commands; - struct sabi_retval sretval; + struct sabi_data sretval; int user_brightness = 0; int retval; - retval = sabi_get_command(samsung, commands->get_brightness, - &sretval); - if (!retval) { - user_brightness = sretval.retval[0]; - if (user_brightness > config->min_brightness) - user_brightness -= config->min_brightness; - else - user_brightness = 0; - } + retval = sabi_command(samsung, commands->get_brightness, + NULL, &sretval); + if (retval) + return retval; + + user_brightness = sretval.data[0]; + if (user_brightness > config->min_brightness) + user_brightness -= config->min_brightness; + else + user_brightness = 0; + return user_brightness; } @@ -410,10 +411,10 @@ static void set_brightness(struct samsung_laptop *samsung, u8 user_brightness) if (user_brightness == read_brightness(samsung)) return; - sabi_set_command(samsung, commands->set_brightness, 0); + sabi_set_commandb(samsung, commands->set_brightness, 0); } - sabi_set_command(samsung, commands->set_brightness, user_level); + sabi_set_commandb(samsung, commands->set_brightness, user_level); } static int get_brightness(struct backlight_device *bd) @@ -465,9 +466,9 @@ static int update_status(struct backlight_device *bd) set_brightness(samsung, bd->props.brightness); if (bd->props.power == FB_BLANK_UNBLANK) - sabi_set_command(samsung, commands->set_backlight, 1); + sabi_set_commandb(samsung, commands->set_backlight, 1); else - sabi_set_command(samsung, commands->set_backlight, 0); + sabi_set_commandb(samsung, commands->set_backlight, 0); return 0; } @@ -488,9 +489,9 @@ static int rfkill_set(void *data, bool blocked) * blocked == true is off */ if (blocked) - sabi_set_command(samsung, commands->set_wireless_button, 0); + sabi_set_commandb(samsung, commands->set_wireless_button, 0); else - sabi_set_command(samsung, commands->set_wireless_button, 1); + sabi_set_commandb(samsung, commands->set_wireless_button, 1); return 0; } @@ -505,19 +506,19 @@ static ssize_t get_performance_level(struct device *dev, struct samsung_laptop *samsung = dev_get_drvdata(dev); const struct sabi_config *config = samsung->config; const struct sabi_commands *commands = &config->commands; - struct sabi_retval sretval; + struct sabi_data sretval; int retval; int i; /* Read the state */ - retval = sabi_get_command(samsung, commands->get_performance_level, - &sretval); + retval = sabi_command(samsung, commands->get_performance_level, + NULL, &sretval); if (retval) return retval; /* The logic is backwards, yeah, lots of fun... */ for (i = 0; config->performance_levels[i].name; ++i) { - if (sretval.retval[0] == config->performance_levels[i].value) + if (sretval.data[0] == config->performance_levels[i].value) return sprintf(buf, "%s\n", config->performance_levels[i].name); } return sprintf(buf, "%s\n", "unknown"); @@ -539,9 +540,9 @@ static ssize_t set_performance_level(struct device *dev, const struct sabi_performance_level *level = &config->performance_levels[i]; if (!strncasecmp(level->name, buf, strlen(level->name))) { - sabi_set_command(samsung, - commands->set_performance_level, - level->value); + sabi_set_commandb(samsung, + commands->set_performance_level, + level->value); break; } } @@ -685,7 +686,7 @@ static void samsung_sabi_exit(struct samsung_laptop *samsung) /* Turn off "Linux" mode in the BIOS */ if (config && config->commands.set_linux != 0xff) - sabi_set_command(samsung, config->commands.set_linux, 0x80); + sabi_set_commandb(samsung, config->commands.set_linux, 0x80); if (samsung->sabi_iface) { iounmap(samsung->sabi_iface); @@ -724,7 +725,7 @@ static void __init samsung_sabi_selftest(struct samsung_laptop *samsung, unsigned int ifaceP) { const struct sabi_config *config = samsung->config; - struct sabi_retval sretval; + struct sabi_data sretval; printk(KERN_DEBUG "ifaceP = 0x%08x\n", ifaceP); printk(KERN_DEBUG "sabi_iface = %p\n", samsung->sabi_iface); @@ -733,8 +734,8 @@ static void __init samsung_sabi_selftest(struct samsung_laptop *samsung, test_backlight(samsung); test_wireless(samsung); - sabi_get_command(samsung, config->commands.get_brightness, &sretval); - printk(KERN_DEBUG "brightness = 0x%02x\n", sretval.retval[0]); + sabi_command(samsung, config->commands.get_brightness, NULL, &sretval); + printk(KERN_DEBUG "brightness = 0x%02x\n", sretval.data[0]); } static int __init samsung_sabi_init(struct samsung_laptop *samsung) @@ -793,8 +794,8 @@ static int __init samsung_sabi_init(struct samsung_laptop *samsung) /* Turn on "Linux" mode in the BIOS */ if (commands->set_linux != 0xff) { - int retval = sabi_set_command(samsung, - commands->set_linux, 0x81); + int retval = sabi_set_commandb(samsung, + commands->set_linux, 0x81); if (retval) { pr_warn("Linux mode was not set!\n"); ret = -ENODEV; -- cgit v1.2.3