From 22565ba0bf231eb4267b1d2ebad300d55b28a427 Mon Sep 17 00:00:00 2001 From: Pali Rohár Date: Mon, 6 Jul 2015 12:08:57 +0200 Subject: dell-laptop: Do not cache hwswitch state MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The hwswitch state can be changed at runtime, so make sure dell-laptop always knows the current state. It can be modified by the userspace utility smbios-wireless-ctl. Signed-off-by: Pali Rohár Signed-off-by: Darren Hart --- drivers/platform/x86/dell-laptop.c | 85 +++++++++++++++++++++++++++----------- 1 file changed, 61 insertions(+), 24 deletions(-) diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c index efcfc4916af2..aaeeae81e3a9 100644 --- a/drivers/platform/x86/dell-laptop.c +++ b/drivers/platform/x86/dell-laptop.c @@ -309,8 +309,6 @@ static const struct dmi_system_id dell_quirks[] __initconst = { static struct calling_interface_buffer *buffer; static DEFINE_MUTEX(buffer_mutex); -static int hwswitch_state; - static void clear_buffer(void) { memset(buffer, 0, sizeof(struct calling_interface_buffer)); @@ -553,20 +551,30 @@ static int dell_rfkill_set(void *data, bool blocked) int disable = blocked ? 1 : 0; unsigned long radio = (unsigned long)data; int hwswitch_bit = (unsigned long)data - 1; + int hwswitch; + int status; int ret; get_buffer(); dell_send_request(buffer, 17, 11); ret = buffer->output[0]; + status = buffer->output[1]; if (ret != 0) goto out; + clear_buffer(); + + buffer->input[0] = 0x2; + dell_send_request(buffer, 17, 11); + ret = buffer->output[0]; + hwswitch = buffer->output[1]; + /* If the hardware switch controls this radio, and the hardware switch is disabled, always disable the radio */ - if ((hwswitch_state & BIT(hwswitch_bit)) && - !(buffer->output[1] & BIT(16))) + if (ret == 0 && (hwswitch & BIT(hwswitch_bit)) && + (status & BIT(0)) && !(status & BIT(16))) disable = 1; clear_buffer(); @@ -597,27 +605,43 @@ static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio, } static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio, - int status) + int status, int hwswitch) { - if (hwswitch_state & (BIT(radio - 1))) + if (hwswitch & (BIT(radio - 1))) rfkill_set_hw_state(rfkill, !(status & BIT(16))); } static void dell_rfkill_query(struct rfkill *rfkill, void *data) { + int radio = ((unsigned long)data & 0xF); + int hwswitch; int status; int ret; get_buffer(); + dell_send_request(buffer, 17, 11); ret = buffer->output[0]; status = buffer->output[1]; + + if (ret != 0 || !(status & BIT(0))) { + release_buffer(); + return; + } + + clear_buffer(); + + buffer->input[0] = 0x2; + dell_send_request(buffer, 17, 11); + ret = buffer->output[0]; + hwswitch = buffer->output[1]; + release_buffer(); if (ret != 0) return; - dell_rfkill_update_hw_state(rfkill, (unsigned long)data, status); + dell_rfkill_update_hw_state(rfkill, radio, status, hwswitch); } static const struct rfkill_ops dell_rfkill_ops = { @@ -629,13 +653,24 @@ static struct dentry *dell_laptop_dir; static int dell_debugfs_show(struct seq_file *s, void *data) { + int hwswitch_state; + int hwswitch_ret; int status; int ret; get_buffer(); + dell_send_request(buffer, 17, 11); ret = buffer->output[0]; status = buffer->output[1]; + + clear_buffer(); + + buffer->input[0] = 0x2; + dell_send_request(buffer, 17, 11); + hwswitch_ret = buffer->output[0]; + hwswitch_state = buffer->output[1]; + release_buffer(); seq_printf(s, "return:\t%d\n", ret); @@ -680,7 +715,8 @@ static int dell_debugfs_show(struct seq_file *s, void *data) seq_printf(s, "Bit 21: WiGig is blocked: %lu\n", (status & BIT(21)) >> 21); - seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state); + seq_printf(s, "\nhwswitch_return:\t%d\n", hwswitch_ret); + seq_printf(s, "hwswitch_state:\t0x%X\n", hwswitch_state); seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n", hwswitch_state & BIT(0)); seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n", @@ -716,6 +752,7 @@ static const struct file_operations dell_debugfs_fops = { static void dell_update_rfkill(struct work_struct *ignored) { + int hwswitch = 0; int status; int ret; @@ -728,16 +765,26 @@ static void dell_update_rfkill(struct work_struct *ignored) if (ret != 0) goto out; + clear_buffer(); + + buffer->input[0] = 0x2; + dell_send_request(buffer, 17, 11); + ret = buffer->output[0]; + + if (ret == 0 && (status & BIT(0))) + hwswitch = buffer->output[1]; + if (wifi_rfkill) { - dell_rfkill_update_hw_state(wifi_rfkill, 1, status); + dell_rfkill_update_hw_state(wifi_rfkill, 1, status, hwswitch); dell_rfkill_update_sw_state(wifi_rfkill, 1, status); } if (bluetooth_rfkill) { - dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status); + dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status, + hwswitch); dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status); } if (wwan_rfkill) { - dell_rfkill_update_hw_state(wwan_rfkill, 3, status); + dell_rfkill_update_hw_state(wwan_rfkill, 3, status, hwswitch); dell_rfkill_update_sw_state(wwan_rfkill, 3, status); } @@ -805,25 +852,15 @@ static int __init dell_setup_rfkill(void) dell_send_request(buffer, 17, 11); ret = buffer->output[0]; status = buffer->output[1]; - clear_buffer(); - buffer->input[0] = 0x2; - dell_send_request(buffer, 17, 11); - hwswitch_state = buffer->output[1]; release_buffer(); /* dell wireless info smbios call is not supported */ if (ret != 0) return 0; - if (!(status & BIT(0))) { - if (force_rfkill) { - /* No hwsitch, clear all hw-controlled bits */ - hwswitch_state &= ~7; - } else { - /* rfkill is only tested on laptops with a hwswitch */ - return 0; - } - } + /* rfkill is only tested on laptops with a hwswitch */ + if (!(status & BIT(0)) && !force_rfkill) + return 0; if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) { wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev, -- cgit v1.2.3