[PATCH v6 07/11] wifi: rtlwifi: Add rtl8192du/fw.{c,h} and rtl8192du/led.{c,h}

[Bitterblue Smith <rtl8821cerfe2@gmail.com>]

fw.c contains a function for loading the firmware.
led.c contains a function for controlling the LED.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
---
v6:
 - Update copyright year.
 - Remove some unused includes.
 - Make all functions use the prefix "rtl92du".

v5:
 - No change.

v4:
 - Fix fw.h and led.h header guards.
 - Add empty lines.
 - Delete globalmutex_for_fwdownload and simplify rtl92d_download_fw.
   It can't run in parallel because mutex_for_hw_init in rtl92du_hw_init
   protects the entire function.

v3:
 - No change.

v2:
 - Patch is new in v2, split from patch 3/3 in v1.
---
 .../wireless/realtek/rtlwifi/rtl8192du/fw.c   | 63 +++++++++++++++++++
 .../wireless/realtek/rtlwifi/rtl8192du/fw.h   |  9 +++
 .../wireless/realtek/rtlwifi/rtl8192du/led.c  | 10 +++
 .../wireless/realtek/rtlwifi/rtl8192du/led.h  |  9 +++
 4 files changed, 91 insertions(+)
 create mode 100644 drivers/net/wireless/realtek/rtlwifi/rtl8192du/fw.c
 create mode 100644 drivers/net/wireless/realtek/rtlwifi/rtl8192du/fw.h
 create mode 100644 drivers/net/wireless/realtek/rtlwifi/rtl8192du/led.c
 create mode 100644 drivers/net/wireless/realtek/rtlwifi/rtl8192du/led.h

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192du/fw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/fw.c
new file mode 100644
index 000000000000..f74e4e84fe39
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/fw.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2024  Realtek Corporation.*/
+
+#include "../wifi.h"
+#include "../rtl8192d/reg.h"
+#include "../rtl8192d/def.h"
+#include "../rtl8192d/fw_common.h"
+#include "fw.h"
+
+int rtl92du_download_fw(struct ieee80211_hw *hw)
+{
+	struct rtl_priv *rtlpriv = rtl_priv(hw);
+	struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
+	enum version_8192d version = rtlhal->version;
+	u8 *pfwheader;
+	u8 *pfwdata;
+	u32 fwsize;
+	int err;
+
+	if (rtlpriv->max_fw_size == 0 || !rtlhal->pfirmware)
+		return 1;
+
+	fwsize = rtlhal->fwsize;
+	pfwheader = rtlhal->pfirmware;
+	pfwdata = rtlhal->pfirmware;
+	rtlhal->fw_version = (u16)GET_FIRMWARE_HDR_VERSION(pfwheader);
+	rtlhal->fw_subversion = (u16)GET_FIRMWARE_HDR_SUB_VER(pfwheader);
+
+	rtl_dbg(rtlpriv, COMP_INIT, DBG_LOUD,
+		"FirmwareVersion(%d), FirmwareSubVersion(%d), Signature(%#x)\n",
+		rtlhal->fw_version, rtlhal->fw_subversion,
+		GET_FIRMWARE_HDR_SIGNATURE(pfwheader));
+
+	if (IS_FW_HEADER_EXIST(pfwheader)) {
+		rtl_dbg(rtlpriv, COMP_INIT, DBG_LOUD,
+			"Shift 32 bytes for FW header!!\n");
+		pfwdata = pfwdata + 32;
+		fwsize = fwsize - 32;
+	}
+
+	if (rtl92d_is_fw_downloaded(rtlpriv))
+		goto exit;
+
+	/* If 8051 is running in RAM code, driver should
+	 * inform Fw to reset by itself, or it will cause
+	 * download Fw fail.
+	 */
+	if (rtl_read_byte(rtlpriv, REG_MCUFWDL) & BIT(7)) {
+		rtl92d_firmware_selfreset(hw);
+		rtl_write_byte(rtlpriv, REG_MCUFWDL, 0x00);
+	}
+
+	rtl92d_enable_fw_download(hw, true);
+	rtl92d_write_fw(hw, version, pfwdata, fwsize);
+	rtl92d_enable_fw_download(hw, false);
+
+	err = rtl92d_fw_free_to_go(hw);
+	if (err)
+		pr_err("fw is not ready to run!\n");
+exit:
+	err = rtl92d_fw_init(hw);
+	return err;
+}
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192du/fw.h b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/fw.h
new file mode 100644
index 000000000000..7904bfbda4ba
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/fw.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2024  Realtek Corporation.*/
+
+#ifndef __RTL92DU_FW_H__
+#define __RTL92DU_FW_H__
+
+int rtl92du_download_fw(struct ieee80211_hw *hw);
+
+#endif
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192du/led.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/led.c
new file mode 100644
index 000000000000..6c12dfbd6367
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/led.c
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2024  Realtek Corporation.*/
+
+#include "../wifi.h"
+#include "led.h"
+
+void rtl92du_led_control(struct ieee80211_hw *hw, enum led_ctl_mode ledaction)
+{
+	/* The hardware has control. */
+}
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192du/led.h b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/led.h
new file mode 100644
index 000000000000..d7ebc8afcc7b
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192du/led.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2024  Realtek Corporation.*/
+
+#ifndef __RTL92DU_LED_H__
+#define __RTL92DU_LED_H__
+
+void rtl92du_led_control(struct ieee80211_hw *hw, enum led_ctl_mode ledaction);
+
+#endif
-- 
2.44.0