/*
* (c) Copyright 2002-2010, Ralink Technology, Inc.
* Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
* Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "mt76x0.h"
#include "eeprom.h"
#include "mcu.h"
#include "initvals.h"
static void mt76x0_vht_cap_mask(struct ieee80211_supported_band *sband)
{
struct ieee80211_sta_vht_cap *vht_cap = &sband->vht_cap;
u16 mcs_map = 0;
int i;
vht_cap->cap &= ~IEEE80211_VHT_CAP_RXLDPC;
for (i = 0; i < 8; i++) {
if (!i)
mcs_map |= (IEEE80211_VHT_MCS_SUPPORT_0_7 << (i * 2));
else
mcs_map |=
(IEEE80211_VHT_MCS_NOT_SUPPORTED << (i * 2));
}
vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map);
vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map);
}
static void
mt76x0_set_wlan_state(struct mt76x02_dev *dev, u32 val, bool enable)
{
u32 mask = MT_CMB_CTRL_XTAL_RDY | MT_CMB_CTRL_PLL_LD;
/* Note: we don't turn off WLAN_CLK because that makes the device
* not respond properly on the probe path.
* In case anyone (PSM?) wants to use this function we can
* bring the clock stuff back and fixup the probe path.
*/
if (enable)
val |= (MT_WLAN_FUN_CTRL_WLAN_EN |
MT_WLAN_FUN_CTRL_WLAN_CLK_EN);
else
val &= ~(MT_WLAN_FUN_CTRL_WLAN_EN);
mt76_wr(dev, MT_WLAN_FUN_CTRL, val);
udelay(20);
/* Note: vendor driver tries to disable/enable wlan here and retry
* but the code which does it is so buggy it must have never
* triggered, so don't bother.
*/
if (enable && !mt76_poll(dev, MT_CMB_CTRL, mask, mask, 2000))
dev_err(dev->mt76.dev, "PLL and XTAL check failed\n");
}
void mt76x0_chip_onoff(struct mt76x02_dev *dev, bool enable, bool reset)
{
u32 val;
val = mt76_rr(dev, MT_WLAN_FUN_CTRL);
if (reset) {
val |= MT_WLAN_FUN_CTRL_GPIO_OUT_EN;
val &= ~MT_WLAN_FUN_CTRL_FRC_WL_ANT_SEL;
if (val & MT_WLAN_FUN_CTRL_WLAN_EN) {
val |= (MT_WLAN_FUN_CTRL_WLAN_RESET |
MT_WLAN_FUN_CTRL_WLAN_RESET_RF);
mt76_wr(dev, MT_WLAN_FUN_CTRL, val);
udelay(20);
val &= ~(MT_WLAN_FUN_CTRL_WLAN_RESET |
MT_WLAN_FUN_CTRL_WLAN_RESET_RF);
}
}
mt76_wr(dev, MT_WLAN_FUN_CTRL, val);
udelay(20);
mt76x0_set_wlan_state(dev, val, enable);
}
EXPORT_SYMBOL_GPL(mt76x0_chip_onoff);
static void mt76x0_reset_csr_bbp(struct mt76x02_dev *dev)
{
mt76_wr(dev, MT_MAC_SYS_CTRL,
MT_MAC_SYS_CTRL_RESET_CSR |
MT_MAC_SYS_CTRL_RESET_BBP);
msleep(200);
mt76_clear(dev, MT_MAC_SYS_CTRL,
MT_MAC_SYS_CTRL_RESET_CSR |
MT_MAC_SYS_CTRL_RESET_BBP);
}
#define RANDOM_WRITE(dev, tab) \
mt76_wr_rp(dev, MT_MCU_MEMMAP_WLAN, \
tab, ARRAY_SIZE(tab))
static int mt76x0_init_bbp(struct mt76x02_dev *dev)
{
int ret, i;
ret = mt76x0_phy_wait_bbp_ready(dev);
if (ret)
return ret;
RANDOM_WRITE(dev, mt76x0_bbp_init_tab);
for (i = 0; i < ARRAY_SIZE(mt76x0_bbp_switch_tab); i++) {
const struct mt76x0_bbp_switch_item *item = &mt76x0_bbp_switch_tab[i];
const struct mt76_reg_pair *pair = &item->reg_pair;
if (((RF_G_BAND | RF_BW_20) & item->bw_band) == (RF_G_BAND | RF_BW_20))
mt76_wr(dev, pair->reg, pair->value);
}
RANDOM_WRITE(dev, mt76x0_dcoc_tab);
return 0;
}
static void mt76x0_init_mac_registers(struct mt76x02_dev *dev)
{
u32 reg;
RANDOM_WRITE(dev, common_mac_reg_table);
mt76x02_set_beacon_offsets(dev);
/* Enable PBF and MAC clock SYS_CTRL[11:10] = 0x3 */
RANDOM_WRITE(dev, mt76x0_mac_reg_table);
/* Release BBP and MAC reset MAC_SYS_CTRL[1:0] = 0x0 */
reg = mt76_rr(dev, MT_MAC_SYS_CTRL);
reg &= ~0x3;
mt76_wr(dev, MT_MAC_SYS_CTRL, reg);
/* Set 0x141C[15:12]=0xF */
reg = mt76_rr(dev, MT_EXT_CCA_CFG);
reg |= 0x0000F000;
mt76_wr(dev, MT_EXT_CCA_CFG, reg);
mt76_clear(dev, MT_FCE_L2_STUFF, MT_FCE_L2_STUFF_WR_MPDU_LEN_EN);
/*
TxRing 9 is for Mgmt frame.
TxRing 8 is for In-band command frame.
WMM_RG0_TXQMA: This register setting is for FCE to define the rule of TxRing 9.
WMM_RG1_TXQMA: This register setting is for FCE to define the rule of TxRing 8.
*/
reg = mt76_rr(dev, MT_WMM_CTRL);
reg &= ~0x000003FF;
reg |= 0x00000201;
mt76_wr(dev, MT_WMM_CTRL, reg);
}
static int mt76x0_init_wcid_mem(struct mt76x02_dev *dev)
{
u32 *vals;
int i;
vals = kmalloc(sizeof(*vals) * MT76_N_WCIDS * 2, GFP_KERNEL);
if (!vals)
return -ENOMEM;
for (i = 0; i < MT76_N_WCIDS; i++) {
vals[i * 2] = 0xffffffff;
vals[i * 2 + 1] = 0x00ffffff;
}
mt76_wr_copy(dev, MT_WCID_ADDR_BASE, vals, MT76_N_WCIDS * 2);
kfree(vals);
return 0;
}
static void mt76x0_init_key_mem(struct mt76x02_dev *dev)
{
u32 vals[4] = {};
mt76_wr_copy(dev, MT_SKEY_MODE_BASE_0, vals, ARRAY_SIZE(vals));
}
static int mt76x0_init_wcid_attr_mem(struct mt76x02_dev *dev)
{
u32 *vals;
int i;
vals = kmalloc(sizeof(*vals) * MT76_N_WCIDS * 2, GFP_KERNEL);
if (!vals)
return -ENOMEM;
for (i = 0; i < MT76_N_WCIDS * 2; i++)
vals[i] = 1;
mt76_wr_copy(dev, MT_WCID_ATTR_BASE, vals, MT76_N_WCIDS * 2);
kfree(vals);
return 0;
}
static void mt76x0_reset_counters(struct mt76x02_dev *dev)
{
mt76_rr(dev, MT_RX_STAT_0);
mt76_rr(dev, MT_RX_STAT_1);
mt76_rr(dev, MT_RX_STAT_2);
mt76_rr(dev, MT_TX_STA_0);
mt76_rr(dev, MT_TX_STA_1);
mt76_rr(dev, MT_TX_STA_2);
}
int mt76x0_mac_start(struct mt76x02_dev *dev)
{
mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
if (!mt76x02_wait_for_wpdma(&dev->mt76, 200000))
return -ETIMEDOUT;
mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.rxfilter);
mt76_wr(dev, MT_MAC_SYS_CTRL,
MT_MAC_SYS_CTRL_ENABLE_TX | MT_MAC_SYS_CTRL_ENABLE_RX);
return !mt76x02_wait_for_wpdma(&dev->mt76, 50) ? -ETIMEDOUT : 0;
}
EXPORT_SYMBOL_GPL(mt76x0_mac_start);
void mt76x0_mac_stop(struct mt76x02_dev *dev)
{
int i = 200, ok = 0;
/* Page count on TxQ */
while (i-- && ((mt76_rr(dev, 0x0438) & 0xffffffff) ||
(mt76_rr(dev, 0x0a30) & 0x000000ff) ||
(mt76_rr(dev, 0x0a34) & 0x00ff00ff)))
msleep(10);
if (!mt76_poll(dev, MT_MAC_STATUS, MT_MAC_STATUS_TX, 0, 1000))
dev_warn(dev->mt76.dev, "Warning: MAC TX did not stop!\n");
mt76_clear(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_RX |
MT_MAC_SYS_CTRL_ENABLE_TX);
/* Page count on RxQ */
for (i = 0; i < 200; i++) {
if (!(mt76_rr(dev, MT_RXQ_STA) & 0x00ff0000) &&
!mt76_rr(dev, 0x0a30) &&
!mt76_rr(dev, 0x0a34)) {
if (ok++ > 5)
break;
continue;
}
msleep(1);
}
if (!mt76_poll(dev, MT_MAC_STATUS, MT_MAC_STATUS_RX, 0, 1000))
dev_warn(dev->mt76.dev, "Warning: MAC RX did not stop!\n");
}
EXPORT_SYMBOL_GPL(mt76x0_mac_stop);
int mt76x0_init_hardware(struct mt76x02_dev *dev)
{
int ret;
if (!mt76x02_wait_for_wpdma(&dev->mt76, 1000))
return -EIO;
/* Wait for ASIC ready after FW load. */
if (!mt76x02_wait_for_mac(&dev->mt76))
return -ETIMEDOUT;
mt76x0_reset_csr_bbp(dev);
ret = mt76x02_mcu_function_select(dev, Q_SELECT, 1, false);
if (ret)
return ret;
mt76x0_init_mac_registers(dev);
if (!mt76x02_wait_for_txrx_idle(&dev->mt76))
return -EIO;
ret = mt76x0_init_bbp(dev);
if (ret)
return ret;
dev->mt76.rxfilter = mt76_rr(dev, MT_RX_FILTR_CFG);
ret = mt76x0_init_wcid_mem(dev);
if (ret)
return ret;
mt76x0_init_key_mem(dev);
ret = mt76x0_init_wcid_attr_mem(dev);
if (ret)
return ret;
mt76_clear(dev, MT_BEACON_TIME_CFG, (MT_BEACON_TIME_CFG_TIMER_EN |
MT_BEACON_TIME_CFG_SYNC_MODE |
MT_BEACON_TIME_CFG_TBTT_EN |
MT_BEACON_TIME_CFG_BEACON_TX));
mt76x0_reset_counters(dev);
ret = mt76x0_eeprom_init(dev);
if (ret)
return ret;
mt76x0_phy_init(dev);
return 0;
}
EXPORT_SYMBOL_GPL(mt76x0_init_hardware);
struct mt76x02_dev *
mt76x0_alloc_device(struct device *pdev,
const struct mt76_driver_ops *drv_ops,
const struct ieee80211_ops *ops)
{
struct mt76x02_dev *dev;
struct mt76_dev *mdev;
mdev = mt76_alloc_device(sizeof(*dev), ops);
if (!mdev)
return NULL;
mdev->dev = pdev;
mdev->drv = drv_ops;
dev = container_of(mdev, struct mt76x02_dev, mt76);
mutex_init(&dev->phy_mutex);
return dev;
}
EXPORT_SYMBOL_GPL(mt76x0_alloc_device);
int mt76x0_register_device(struct mt76x02_dev *dev)
{
struct mt76_dev *mdev = &dev->mt76;
struct ieee80211_hw *hw = mdev->hw;
struct wiphy *wiphy = hw->wiphy;
int ret;
/* Reserve WCID 0 for mcast - thanks to this APs WCID will go to
* entry no. 1 like it does in the vendor driver.
*/
mdev->wcid_mask[0] |= 1;
/* init fake wcid for monitor interfaces */
mdev->global_wcid.idx = 0xff;
mdev->global_wcid.hw_key_idx = -1;
/* init antenna configuration */
mdev->antenna_mask = 1;
hw->queues = 4;
hw->max_rates = 1;
hw->max_report_rates = 7;
hw->max_rate_tries = 1;
hw->extra_tx_headroom = 2;
if (mt76_is_usb(dev))
hw->extra_tx_headroom += sizeof(struct mt76x02_txwi) +
MT_DMA_HDR_LEN;
hw->sta_data_size = sizeof(struct mt76x02_sta);
hw->vif_data_size = sizeof(struct mt76x02_vif);
wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
INIT_DELAYED_WORK(&dev->mac_work, mt76x02_mac_work);
ret = mt76_register_device(mdev, true, mt76x02_rates,
ARRAY_SIZE(mt76x02_rates));
if (ret)
return ret;
/* overwrite unsupported features */
if (mdev->cap.has_5ghz)
mt76x0_vht_cap_mask(&dev->mt76.sband_5g.sband);
mt76x02_init_debugfs(dev);
return 0;
}
EXPORT_SYMBOL_GPL(mt76x0_register_device);
