62 lines
1.8 KiB
Diff
62 lines
1.8 KiB
Diff
From f0db13a15c76c2947eec8919fd121450048914ce Mon Sep 17 00:00:00 2001
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From: Nicholas Chin <nic.c3.14@gmail.com>
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Date: Sun, 27 Aug 2023 17:36:36 -0600
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Subject: [PATCH 20/22] ec/dell/mec5035: Add command to enable/disable radios
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These were determined by sniffing the LPC bus while toggling the
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hardware wireless switch on the Latitude E6400. To differentiate devices
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options in the vendor BIOS to change which radios the switch controlled
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were used.
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Change-Id: I173dc197d63cda232dd7ede0cb798ab0a364482b
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Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
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---
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src/ec/dell/mec5035/mec5035.c | 9 +++++++++
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src/ec/dell/mec5035/mec5035.h | 8 ++++++++
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2 files changed, 17 insertions(+)
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diff --git a/src/ec/dell/mec5035/mec5035.c b/src/ec/dell/mec5035/mec5035.c
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index 8da11e5b1c..e0335a4635 100644
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--- a/src/ec/dell/mec5035/mec5035.c
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+++ b/src/ec/dell/mec5035/mec5035.c
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@@ -84,6 +84,15 @@ u8 mec5035_mouse_touchpad(u8 setting)
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return buf[0];
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}
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+void mec5035_radio_enable(enum mec5035_radio_dev dev, u8 on)
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+{
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+ /* From LPC traces and userspace testing with other values,
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+ the second byte has to be 2 for an unknown reason. */
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+ u8 buf[3] = {dev, 2, on};
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+ write_mailbox_regs(buf, 2, 3);
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+ ec_command(CMD_RADIO_EN);
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+}
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+
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void mec5035_early_init(void)
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{
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/* If this isn't sent the EC shuts down the system after about 15
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diff --git a/src/ec/dell/mec5035/mec5035.h b/src/ec/dell/mec5035/mec5035.h
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index e7a05b64d4..16512e2cc2 100644
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--- a/src/ec/dell/mec5035/mec5035.h
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+++ b/src/ec/dell/mec5035/mec5035.h
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@@ -16,8 +16,16 @@
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#define CMD_CPU_OK 0xc2
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+#define CMD_RADIO_EN 0x2b
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+enum mec5035_radio_dev {
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+ RADIO_WLAN = 0,
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+ RADIO_WWAN = 1,
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+ RADIO_WPAN = 2,
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+};
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+
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u8 mec5035_mouse_touchpad(u8 setting);
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void mec5035_cpu_ok(void);
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void mec5035_early_init(void);
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+void mec5035_radio_enable(enum mec5035_radio_dev device, u8 on);
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#endif /* _EC_DELL_MEC5035_H_ */
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--
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2.39.2
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