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rtl8xxxu: fix RTL8723BU connection failure issue after warm reboot
The RTL8723BU has problems connecting to AP after each warm reboot. Sometimes it returns no scan result, and in most cases, it fails the authentication for unknown reason. However, it works totally fine after cold reboot. Compare the value of register SYS_CR and SYS_CLK_MAC_CLK_ENABLE for cold reboot and warm reboot, the registers imply that the MAC is already powered and thus some procedures are skipped during driver initialization. Double checked the vendor driver, it reads the SYS_CR and SYS_CLK_MAC_CLK_ENABLE also but doesn't skip any during initialization based on them. This commit only tells the RTL8723BU to do full initialization without checking MAC status. Signed-off-by: Chris Chiu <chiu@endlessm.com> Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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3 changed files with 5 additions and 0 deletions
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@ -1425,6 +1425,7 @@ struct rtl8xxxu_fileops {
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u8 has_s0s1:1;
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u8 has_tx_report:1;
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u8 gen2_thermal_meter:1;
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u8 needs_full_init:1;
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u32 adda_1t_init;
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u32 adda_1t_path_on;
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u32 adda_2t_path_on_a;
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@ -1668,6 +1668,7 @@ struct rtl8xxxu_fileops rtl8723bu_fops = {
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.has_s0s1 = 1,
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.has_tx_report = 1,
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.gen2_thermal_meter = 1,
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.needs_full_init = 1,
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.adda_1t_init = 0x01c00014,
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.adda_1t_path_on = 0x01c00014,
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.adda_2t_path_on_a = 0x01c00014,
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@ -3900,6 +3900,9 @@ static int rtl8xxxu_init_device(struct ieee80211_hw *hw)
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else
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macpower = true;
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if (fops->needs_full_init)
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macpower = false;
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ret = fops->power_on(priv);
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if (ret < 0) {
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dev_warn(dev, "%s: Failed power on\n", __func__);
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