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From:   Ping-Ke Shih <pkshih@realtek.com>
To:     <kvalo@codeaurora.org>
CC:     <linux-wireless@vger.kernel.org>
Subject: [PATCH 05/24] rtw89: add efuse files
Date:   Fri, 18 Jun 2021 14:46:06 +0800
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Efuse is divided into several parts, in which physical map and PHY cap
parts are read and parsed by driver.

Storing main data, physical map is translated into logic map, and then use
chip specific map to explain the logic map. Then, we can have MAC address,
country code, thermal tracking calibration values, and so on.

PHY cap part is used to store PHY data. We don't need to translate it,
because it's a direct map, like logic map.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/efuse.c | 188 +++++++++++++++++++++
 drivers/net/wireless/realtek/rtw89/efuse.h |  13 ++
 2 files changed, 201 insertions(+)
 create mode 100644 drivers/net/wireless/realtek/rtw89/efuse.c
 create mode 100644 drivers/net/wireless/realtek/rtw89/efuse.h

diff --git a/drivers/net/wireless/realtek/rtw89/efuse.c b/drivers/net/wireless/realtek/rtw89/efuse.c
new file mode 100644
index 000000000000..3bea7d813985
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw89/efuse.c
@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2019-2020  Realtek Corporation
+ */
+
+#include "debug.h"
+#include "efuse.h"
+#include "reg.h"
+
+enum rtw89_efuse_bank {
+	RTW89_EFUSE_BANK_WIFI,
+	RTW89_EFUSE_BANK_BT,
+};
+
+static int rtw89_switch_efuse_bank(struct rtw89_dev *rtwdev,
+				   enum rtw89_efuse_bank bank)
+{
+	u8 val;
+
+	val = rtw89_read32_mask(rtwdev, R_AX_EFUSE_CTRL_1,
+				B_AX_EF_CELL_SEL_MASK);
+	if (bank == val)
+		return 0;
+
+	rtw89_write32_mask(rtwdev, R_AX_EFUSE_CTRL_1, B_AX_EF_CELL_SEL_MASK,
+			   bank);
+
+	val = rtw89_read32_mask(rtwdev, R_AX_EFUSE_CTRL_1,
+				B_AX_EF_CELL_SEL_MASK);
+	if (bank == val)
+		return 0;
+
+	return -EBUSY;
+}
+
+static int rtw89_dump_physical_efuse_map(struct rtw89_dev *rtwdev, u8 *map,
+					 u32 dump_addr, u32 dump_size)
+{
+	u32 efuse_ctl;
+	u32 addr;
+	int ret;
+
+	rtw89_switch_efuse_bank(rtwdev, RTW89_EFUSE_BANK_WIFI);
+
+	for (addr = dump_addr; addr < dump_addr + dump_size; addr++) {
+		efuse_ctl = u32_encode_bits(addr, B_AX_EF_ADDR_MASK);
+		rtw89_write32(rtwdev, R_AX_EFUSE_CTRL, efuse_ctl & ~B_AX_EF_RDY);
+
+		ret = read_poll_timeout_atomic(rtw89_read32, efuse_ctl,
+					       efuse_ctl & B_AX_EF_RDY, 1, 1000000,
+					       true, rtwdev, R_AX_EFUSE_CTRL);
+		if (ret)
+			return -EBUSY;
+
+		*map++ = (u8)(efuse_ctl & 0xff);
+	}
+
+	return 0;
+}
+
+#define invalid_efuse_header(hdr1, hdr2) \
+	((hdr1) == 0xff || (hdr2) == 0xff)
+#define invalid_efuse_content(word_en, i) \
+	(((word_en) & BIT(i)) != 0x0)
+#define get_efuse_blk_idx(hdr1, hdr2) \
+	((((hdr2) & 0xf0) >> 4) | (((hdr1) & 0x0f) << 4))
+#define block_idx_to_logical_idx(blk_idx, i) \
+	(((blk_idx) << 3) + ((i) << 1))
+static int rtw89_dump_logical_efuse_map(struct rtw89_dev *rtwdev, u8 *phy_map,
+					u8 *log_map)
+{
+	u32 physical_size = rtwdev->chip->physical_efuse_size;
+	u32 logical_size = rtwdev->chip->logical_efuse_size;
+	u8 sec_ctrl_size = rtwdev->chip->sec_ctrl_efuse_size;
+	u32 phy_idx = sec_ctrl_size;
+	u32 log_idx;
+	u8 hdr1, hdr2;
+	u8 blk_idx;
+	u8 word_en;
+	int i;
+
+	while (phy_idx < physical_size - sec_ctrl_size) {
+		hdr1 = phy_map[phy_idx];
+		hdr2 = phy_map[phy_idx + 1];
+		if (invalid_efuse_header(hdr1, hdr2))
+			break;
+
+		blk_idx = get_efuse_blk_idx(hdr1, hdr2);
+		word_en = hdr2 & 0xf;
+		phy_idx += 2;
+
+		for (i = 0; i < 4; i++) {
+			if (invalid_efuse_content(word_en, i))
+				continue;
+
+			log_idx = block_idx_to_logical_idx(blk_idx, i);
+			if (phy_idx + 1 > physical_size - sec_ctrl_size - 1 ||
+			    log_idx + 1 > logical_size)
+				return -EINVAL;
+
+			log_map[log_idx] = phy_map[phy_idx];
+			log_map[log_idx + 1] = phy_map[phy_idx + 1];
+			phy_idx += 2;
+		}
+	}
+	return 0;
+}
+
+int rtw89_parse_efuse_map(struct rtw89_dev *rtwdev)
+{
+	u32 phy_size = rtwdev->chip->physical_efuse_size;
+	u32 log_size = rtwdev->chip->logical_efuse_size;
+	u8 *phy_map = NULL;
+	u8 *log_map = NULL;
+	int ret;
+
+	if (rtw89_read16(rtwdev, R_AX_SYS_EEPROM_CTRL) & B_AX_AUTOLOAD_SUS)
+		rtwdev->efuse.valid = true;
+	else
+		rtw89_warn(rtwdev, "failed to check efuse autoload\n");
+
+	phy_map = kmalloc(phy_size, GFP_KERNEL);
+	log_map = kmalloc(log_size, GFP_KERNEL);
+
+	if (!phy_map || !log_map) {
+		ret = -ENOMEM;
+		goto out_free;
+	}
+
+	ret = rtw89_dump_physical_efuse_map(rtwdev, phy_map, 0, phy_size);
+	if (ret) {
+		rtw89_warn(rtwdev, "failed to dump efuse physical map\n");
+		goto out_free;
+	}
+
+	memset(log_map, 0xff, log_size);
+	ret = rtw89_dump_logical_efuse_map(rtwdev, phy_map, log_map);
+	if (ret) {
+		rtw89_warn(rtwdev, "failed to dump efuse logical map\n");
+		goto out_free;
+	}
+
+	rtw89_hex_dump(rtwdev, RTW89_DBG_FW, "log_map: ", log_map, log_size);
+
+	ret = rtwdev->chip->ops->read_efuse(rtwdev, log_map);
+	if (ret) {
+		rtw89_warn(rtwdev, "failed to read efuse map\n");
+		goto out_free;
+	}
+
+out_free:
+	kfree(log_map);
+	kfree(phy_map);
+
+	return ret;
+}
+
+int rtw89_parse_phycap_map(struct rtw89_dev *rtwdev)
+{
+	u32 phycap_addr = rtwdev->chip->phycap_addr;
+	u32 phycap_size = rtwdev->chip->phycap_size;
+	u8 *phycap_map = NULL;
+	int ret = 0;
+
+	if (!phycap_size)
+		return 0;
+
+	phycap_map = kmalloc(phycap_size, GFP_KERNEL);
+	if (!phycap_map)
+		return -ENOMEM;
+
+	ret = rtw89_dump_physical_efuse_map(rtwdev, phycap_map,
+					    phycap_addr, phycap_size);
+	if (ret) {
+		rtw89_warn(rtwdev, "failed to dump phycap map\n");
+		goto out_free;
+	}
+
+	ret = rtwdev->chip->ops->read_phycap(rtwdev, phycap_map);
+	if (ret) {
+		rtw89_warn(rtwdev, "failed to read phycap map\n");
+		goto out_free;
+	}
+
+out_free:
+	kfree(phycap_map);
+
+	return ret;
+}
diff --git a/drivers/net/wireless/realtek/rtw89/efuse.h b/drivers/net/wireless/realtek/rtw89/efuse.h
new file mode 100644
index 000000000000..622ff95e7476
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw89/efuse.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/* Copyright(c) 2019-2020  Realtek Corporation
+ */
+
+#ifndef __RTW89_EFUSE_H__
+#define __RTW89_EFUSE_H__
+
+#include "core.h"
+
+int rtw89_parse_efuse_map(struct rtw89_dev *rtwdev);
+int rtw89_parse_phycap_map(struct rtw89_dev *rtwdev);
+
+#endif
-- 
2.25.1