linux/drivers/net/wireless/realtek/rtw89/rtw8852ce.c
Ping-Ke Shih 52edbb9fb7 rtw89: ps: access TX/RX rings via another registers in low power mode
In low power mode, we need to pause PCI to configure IMR and PCI ring
index registers accordingly, because the regular registers are power-off
in this mode.

In the transition moment named paused in code, we can't touch ring index,
so don't kick off DMA immediately. Instead, queue them into pending queue,
and kick off after the moment.

There are three low power modes, which are RF off/clock gate/power gate,
but PCI enter low power mode in later two modes only. So, add a mask
to achieve this.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220421120903.73715-7-pkshih@realtek.com
2022-04-24 14:30:34 +03:00

91 lines
2.8 KiB
C

// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright(c) 2020-2022 Realtek Corporation
*/
#include <linux/module.h>
#include <linux/pci.h>
#include "pci.h"
#include "reg.h"
#include "rtw8852c.h"
static const struct rtw89_pci_bd_idx_addr rtw8852c_bd_idx_addr_low_power = {
.tx_bd_addrs = {R_AX_DRV_FW_HSK_0, R_AX_DRV_FW_HSK_1, R_AX_DRV_FW_HSK_2,
R_AX_DRV_FW_HSK_3, 0, 0,
0, 0, R_AX_DRV_FW_HSK_4,
0, 0, 0,
R_AX_DRV_FW_HSK_5},
.rx_bd_addrs = {R_AX_DRV_FW_HSK_6, R_AX_DRV_FW_HSK_7},
};
static const struct rtw89_pci_info rtw8852c_pci_info = {
.txbd_trunc_mode = MAC_AX_BD_TRUNC,
.rxbd_trunc_mode = MAC_AX_BD_TRUNC,
.rxbd_mode = MAC_AX_RXBD_PKT,
.tag_mode = MAC_AX_TAG_MULTI,
.tx_burst = MAC_AX_TX_BURST_V1_256B,
.rx_burst = MAC_AX_RX_BURST_V1_128B,
.wd_dma_idle_intvl = MAC_AX_WD_DMA_INTVL_256NS,
.wd_dma_act_intvl = MAC_AX_WD_DMA_INTVL_256NS,
.multi_tag_num = MAC_AX_TAG_NUM_8,
.lbc_en = MAC_AX_PCIE_ENABLE,
.lbc_tmr = MAC_AX_LBC_TMR_2MS,
.autok_en = MAC_AX_PCIE_DISABLE,
.io_rcy_en = MAC_AX_PCIE_ENABLE,
.io_rcy_tmr = MAC_AX_IO_RCY_ANA_TMR_6MS,
.init_cfg_reg = R_AX_HAXI_INIT_CFG1,
.txhci_en_bit = B_AX_TXHCI_EN_V1,
.rxhci_en_bit = B_AX_RXHCI_EN_V1,
.rxbd_mode_bit = B_AX_RXBD_MODE_V1,
.exp_ctrl_reg = R_AX_HAXI_EXP_CTRL,
.max_tag_num_mask = B_AX_MAX_TAG_NUM_V1_MASK,
.rxbd_rwptr_clr_reg = R_AX_RXBD_RWPTR_CLR_V1,
.txbd_rwptr_clr2_reg = R_AX_TXBD_RWPTR_CLR2_V1,
.dma_stop1_reg = R_AX_HAXI_DMA_STOP1,
.dma_stop2_reg = R_AX_HAXI_DMA_STOP2,
.dma_busy1_reg = R_AX_HAXI_DMA_BUSY1,
.dma_busy2_reg = R_AX_HAXI_DMA_BUSY2,
.dma_busy3_reg = R_AX_HAXI_DMA_BUSY3,
.rpwm_addr = R_AX_PCIE_HRPWM_V1,
.cpwm_addr = R_AX_PCIE_CRPWM,
.bd_idx_addr_low_power = &rtw8852c_bd_idx_addr_low_power,
.dma_addr_set = &rtw89_pci_ch_dma_addr_set_v1,
.ltr_set = rtw89_pci_ltr_set_v1,
.fill_txaddr_info = rtw89_pci_fill_txaddr_info_v1,
.config_intr_mask = rtw89_pci_config_intr_mask_v1,
.enable_intr = rtw89_pci_enable_intr_v1,
.disable_intr = rtw89_pci_disable_intr_v1,
.recognize_intrs = rtw89_pci_recognize_intrs_v1,
};
static const struct rtw89_driver_info rtw89_8852ce_info = {
.chip = &rtw8852c_chip_info,
.bus = {
.pci = &rtw8852c_pci_info,
},
};
static const struct pci_device_id rtw89_8852ce_id_table[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0xc852),
.driver_data = (kernel_ulong_t)&rtw89_8852ce_info,
},
{},
};
MODULE_DEVICE_TABLE(pci, rtw89_8852ce_id_table);
static struct pci_driver rtw89_8852ce_driver = {
.name = "rtw89_8852ce",
.id_table = rtw89_8852ce_id_table,
.probe = rtw89_pci_probe,
.remove = rtw89_pci_remove,
.driver.pm = &rtw89_pm_ops,
};
module_pci_driver(rtw89_8852ce_driver);
MODULE_AUTHOR("Realtek Corporation");
MODULE_DESCRIPTION("Realtek 802.11ax wireless 8852CE driver");
MODULE_LICENSE("Dual BSD/GPL");