rtw88: new Realtek 802.11ac driver

This is a new mac80211 driver for Realtek 802.11ac wireless network chips.
rtw88 now supports RTL8822BE/RTL8822CE now, with basic station mode
functionalities. The firmware for both can be found at linux-firmware.

https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
For RTL8822BE: rtw88/rtw8822b_fw.bin
For RTL8822CE: rtw88/rtw8822c_fw.bin

And for now, only PCI buses (RTL8xxxE) are supported. We will add support
for USB and SDIO in the future. The bus interface abstraction can be seen
in this driver such as hci.h. Most of the hardware setting are the same
except for some TRX path or probing setup should be separated.

Supported:

 * Basic STA/AP/ADHOC mode, and TDLS (STA is well tested)

Missing feature:

 * WOW/PNO
 * USB & SDIO bus (such as RTL8xxxU/RTL8xxxS)
 * BT coexistence (8822B/8822C are combo ICs)
 * Multiple interfaces (for now single STA is better supported)
 * Dynamic hardware calibrations (to improve/stabilize performance)

Potential problems:

 * static calibration spends too much time, and it is painful for
   driver to leave IDLE state. And slows down associate process.
   But reload function are under development, will be added soon!
 * TRX statictics misleading, as we are not reporting status correctly,
   or say, not reporting for "every" packet.

The next patch set should have BT coexistence code since RTL8822B/C are
combo ICs, and the driver for BT can be found after Linux Kernel v4.20.
So it is better to add it first to make WiFi + BT work concurrently.

Although now rtw88 is simple but we are developing more features for it.
Even we want to add support for more chips such as RTL8821C/RTL8814B.

Finally, rtw88 has many authors, listed alphabetically:

Ping-Ke Shih <pkshih@realtek.com>
Tzu-En Huang <tehuang@realtek.com>
Yan-Hsuan Chuang <yhchuang@realtek.com>

Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 186 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.h b/drivers/net/wireless/realtek/rtw88/rtw8822c.h
new file mode 100644
index 000000000000..d3bd9850baa0
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.h
@@ -0,0 +1,186 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/* Copyright(c) 2018-2019  Realtek Corporation
+ */
+
+#ifndef __RTW8822C_H__
+#define __RTW8822C_H__
+
+#include <asm/byteorder.h>
+
+struct rtw8822cu_efuse {
+	u8 res0[0x30];			/* 0x120 */
+	u8 vid[2];			/* 0x150 */
+	u8 pid[2];
+	u8 res1[3];
+	u8 mac_addr[ETH_ALEN];		/* 0x157 */
+	u8 res2[0x3d];
+};
+
+struct rtw8822ce_efuse {
+	u8 mac_addr[ETH_ALEN];		/* 0x120 */
+	u8 vender_id[2];
+	u8 device_id[2];
+	u8 sub_vender_id[2];
+	u8 sub_device_id[2];
+	u8 pmc[2];
+	u8 exp_device_cap[2];
+	u8 msi_cap;
+	u8 ltr_cap;			/* 0x133 */
+	u8 exp_link_control[2];
+	u8 link_cap[4];
+	u8 link_control[2];
+	u8 serial_number[8];
+	u8 res0:2;			/* 0x144 */
+	u8 ltr_en:1;
+	u8 res1:2;
+	u8 obff:2;
+	u8 res2:3;
+	u8 obff_cap:2;
+	u8 res3:4;
+	u8 class_code[3];
+	u8 res4;
+	u8 pci_pm_L1_2_supp:1;
+	u8 pci_pm_L1_1_supp:1;
+	u8 aspm_pm_L1_2_supp:1;
+	u8 aspm_pm_L1_1_supp:1;
+	u8 L1_pm_substates_supp:1;
+	u8 res5:3;
+	u8 port_common_mode_restore_time;
+	u8 port_t_power_on_scale:2;
+	u8 res6:1;
+	u8 port_t_power_on_value:5;
+	u8 res7;
+};
+
+struct rtw8822c_efuse {
+	__le16 rtl_id;
+	u8 res0[0x0e];
+
+	/* power index for four RF paths */
+	struct rtw_txpwr_idx txpwr_idx_table[4];
+
+	u8 channel_plan;		/* 0xb8 */
+	u8 xtal_k;
+	u8 res1;
+	u8 iqk_lck;
+	u8 res2[5];			/* 0xbc */
+	u8 rf_board_option;
+	u8 rf_feature_option;
+	u8 rf_bt_setting;
+	u8 eeprom_version;
+	u8 eeprom_customer_id;
+	u8 tx_bb_swing_setting_2g;
+	u8 tx_bb_swing_setting_5g;
+	u8 tx_pwr_calibrate_rate;
+	u8 rf_antenna_option;		/* 0xc9 */
+	u8 rfe_option;
+	u8 country_code[2];
+	u8 res3[3];
+	u8 path_a_thermal;		/* 0xd0 */
+	u8 path_b_thermal;
+	u8 res4[2];
+	u8 rx_gain_gap_2g_ofdm;
+	u8 res5;
+	u8 rx_gain_gap_2g_cck;
+	u8 res6;
+	u8 rx_gain_gap_5gl;
+	u8 res7;
+	u8 rx_gain_gap_5gm;
+	u8 res8;
+	u8 rx_gain_gap_5gh;
+	u8 res9;
+	u8 res10[0x42];
+	union {
+		struct rtw8822cu_efuse u;
+		struct rtw8822ce_efuse e;
+	};
+};
+
+#define DACK_PATH_8822C		2
+#define DACK_REG_8822C		16
+#define DACK_RF_8822C		1
+#define DACK_SN_8822C		100
+
+/* phy status page0 */
+#define GET_PHY_STAT_P0_PWDB_A(phy_stat)                                       \
+	le32_get_bits(*((__le32 *)(phy_stat) + 0x00), GENMASK(15, 8))
+#define GET_PHY_STAT_P0_PWDB_B(phy_stat)                                       \
+	le32_get_bits(*((__le32 *)(phy_stat) + 0x04), GENMASK(7, 0))
+#define GET_PHY_STAT_P0_GAIN_A(phy_stat)                                       \
+	le32_get_bits(*((__le32 *)(phy_stat) + 0x00), GENMASK(21, 16))
+#define GET_PHY_STAT_P0_GAIN_B(phy_stat)                                       \
+	le32_get_bits(*((__le32 *)(phy_stat) + 0x04), GENMASK(29, 24))
+
+/* phy status page1 */
+#define GET_PHY_STAT_P1_PWDB_A(phy_stat)                                       \
+	le32_get_bits(*((__le32 *)(phy_stat) + 0x00), GENMASK(15, 8))
+#define GET_PHY_STAT_P1_PWDB_B(phy_stat)                                       \
+	le32_get_bits(*((__le32 *)(phy_stat) + 0x00), GENMASK(23, 16))
+#define GET_PHY_STAT_P1_L_RXSC(phy_stat)                                       \
+	le32_get_bits(*((__le32 *)(phy_stat) + 0x01), GENMASK(11, 8))
+#define GET_PHY_STAT_P1_HT_RXSC(phy_stat)                                      \
+	le32_get_bits(*((__le32 *)(phy_stat) + 0x01), GENMASK(15, 12))
+
+#define REG_ANAPARLDO_POW_MAC	0x0029
+#define BIT_LDOE25_PON		BIT(0)
+#define REG_RRSR		0x0440
+#define BITS_RRSR_RSC		(BIT(21) | BIT(22))
+
+#define REG_TXDFIR0	0x808
+#define REG_DFIRBW	0x810
+#define REG_ANTMAP0	0x820
+#define REG_ANTMAP	0x824
+#define REG_DYMPRITH	0x86c
+#define REG_DYMENTH0	0x870
+#define REG_DYMENTH	0x874
+#define REG_DYMTHMIN	0x8a4
+#define REG_TXBWCTL	0x9b0
+#define REG_TXCLK	0x9b4
+#define REG_SCOTRK	0xc30
+#define REG_MRCM	0xc38
+#define REG_AGCSWSH	0xc44
+#define REG_ANTWTPD	0xc54
+#define REG_ORITXCODE	0x1800
+#define REG_3WIRE	0x180c
+#define BIT_3WIRE_TX_EN		BIT(0)
+#define BIT_3WIRE_RX_EN		BIT(1)
+#define BIT_3WIRE_PI_ON		BIT(28)
+#define REG_RXAGCCTL0	0x18ac
+#define REG_CCKSB	0x1a00
+#define REG_RXCCKSEL	0x1a04
+#define REG_BGCTRL	0x1a14
+#define BITS_RX_IQ_WEIGHT	(BIT(8) | BIT(9))
+#define REG_TXF0	0x1a20
+#define REG_TXF1	0x1a24
+#define REG_TXF2	0x1a28
+#define REG_CCANRX	0x1a2c
+#define BIT_CCK_FA_RST		(BIT(14) | BIT(15))
+#define BIT_OFDM_FA_RST		(BIT(12) | BIT(13))
+#define REG_CCK_FACNT	0x1a5c
+#define REG_CCKTXONLY	0x1a80
+#define BIT_BB_CCK_CHECK_EN	BIT(18)
+#define REG_TXF3	0x1a98
+#define REG_TXF4	0x1a9c
+#define REG_TXF5	0x1aa0
+#define REG_TXF6	0x1aac
+#define REG_TXF7	0x1ab0
+#define REG_TXANT	0x1c28
+#define REG_ENCCK	0x1c3c
+#define BIT_CCK_BLK_EN		BIT(1)
+#define BIT_CCK_OFDM_BLK_EN	(BIT(0) | BIT(1))
+#define REG_CCAMSK	0x1c80
+#define REG_RXFNCTL	0x1d30
+#define REG_RXIGI	0x1d70
+#define REG_ENFN	0x1e24
+#define REG_TXANTSEG	0x1e28
+#define REG_TXLGMAP	0x1e2c
+#define REG_CCKPATH	0x1e5c
+#define REG_CNT_CTRL	0x1eb4
+#define BIT_ALL_CNT_RST		BIT(25)
+#define REG_OFDM_FACNT	0x2d00
+#define REG_OFDM_TXCNT	0x2de0
+#define REG_ORITXCODE2	0x4100
+#define REG_3WIRE2	0x410c
+#define REG_RXAGCCTL	0x41ac
+
+#endif