From 2f48eaf36f02a6607b4f94b6e8e48ec21b910e87 Mon Sep 17 00:00:00 2001 From: Nicholas Chin Date: Sun, 27 Aug 2023 17:36:36 -0600 Subject: ec/dell/mec5035: Add command to control radio state This was determined by sniffing the LPC bus while moving the hardware wireless switch between the enabled and disabled positions on the Latitude E6400. The vendor BIOS provides options to change which radios the switch controls, which was used to determine the mapping between each radio device and the command argument values. Change-Id: I173dc197d63cda232dd7ede0cb798ab0a364482b Signed-off-by: Nicholas Chin Reviewed-on: https://review.coreboot.org/c/coreboot/+/77534 Reviewed-by: Felix Held Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel --- src/ec/dell/mec5035/mec5035.c | 9 +++++++++ src/ec/dell/mec5035/mec5035.h | 14 ++++++++++++++ 2 files changed, 23 insertions(+) (limited to 'src/ec/dell/mec5035') diff --git a/src/ec/dell/mec5035/mec5035.c b/src/ec/dell/mec5035/mec5035.c index 8da11e5b1c..41b8dca978 100644 --- a/src/ec/dell/mec5035/mec5035.c +++ b/src/ec/dell/mec5035/mec5035.c @@ -84,6 +84,15 @@ u8 mec5035_mouse_touchpad(u8 setting) return buf[0]; } +void mec5035_control_radio(enum ec_radio_dev dev, enum ec_radio_state state) +{ + /* From LPC traces and userspace testing with other values, + the second byte has to be 2 for an unknown reason. */ + u8 buf[RADIO_CTRL_NUM_ARGS] = {(u8)dev, 2, (u8)state}; + write_mailbox_regs(buf, 2, RADIO_CTRL_NUM_ARGS); + ec_command(CMD_RADIO_CTRL); +} + void mec5035_early_init(void) { /* If this isn't sent the EC shuts down the system after about 15 diff --git a/src/ec/dell/mec5035/mec5035.h b/src/ec/dell/mec5035/mec5035.h index e7a05b64d4..fa15a9d621 100644 --- a/src/ec/dell/mec5035/mec5035.h +++ b/src/ec/dell/mec5035/mec5035.h @@ -16,8 +16,22 @@ #define CMD_CPU_OK 0xc2 +#define CMD_RADIO_CTRL 0x2b +#define RADIO_CTRL_NUM_ARGS 3 +enum ec_radio_dev { + RADIO_WLAN = 0, + RADIO_WWAN, + RADIO_BT +}; + +enum ec_radio_state { + RADIO_OFF = 0, + RADIO_ON +}; + u8 mec5035_mouse_touchpad(u8 setting); void mec5035_cpu_ok(void); void mec5035_early_init(void); +void mec5035_control_radio(enum ec_radio_dev device, enum ec_radio_state state); #endif /* _EC_DELL_MEC5035_H_ */ -- cgit v1.2.3