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[2a01:c22:73dd:8200::e63]) by smtp.googlemail.com with ESMTPSA id z17-20020a5096d1000000b004aee4e2a56esm5413201eda.0.2023.03.20.14.35.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Mar 2023 14:35:24 -0700 (PDT) From: Martin Blumenstingl To: linux-wireless@vger.kernel.org Cc: Yan-Hsuan Chuang , Kalle Valo , Ulf Hansson , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-mmc@vger.kernel.org, Chris Morgan , Nitin Gupta , Neo Jou , Pkshih , Jernej Skrabec , Larry Finger , Martin Blumenstingl Subject: [PATCH v3 3/9] wifi: rtw88: mac: Support SDIO specific bits in the power on sequence Date: Mon, 20 Mar 2023 22:35:02 +0100 Message-Id: <20230320213508.2358213-4-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230320213508.2358213-1-martin.blumenstingl@googlemail.com> References: <20230320213508.2358213-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Add the code specific to SDIO HCI in the MAC power on sequence. This is based on the RTL8822BS and RTL8822CS vendor drivers. Co-developed-by: Jernej Skrabec Signed-off-by: Jernej Skrabec Signed-off-by: Martin Blumenstingl Reviewed-by: Ping-Ke Shih --- - add sdio.h include in patch 2 already (instead of patch 3) as suggested by Larry Finger (thank you!) so the build doesn't break during bisect - only set RTW_FLAG_POWERON when applying the power on sequence was successful (thanks for the suggestion Ping-Ke!) - fix smatch false positive "uninitialized symbol 'imr'" in rtw_mac_power_switch() by initializing imr to 0. Thanks for spotting this and for the suggestion Ping-Ke! Changes since v1: - only access REG_SDIO_HIMR for RTW_HCI_TYPE_SDIO - use proper BIT_HCI_SUS_REQ, BIT_HCI_RESUME_RDY and BIT_SDIO_PAD_E5 macros as suggested by Ping-Ke drivers/net/wireless/realtek/rtw88/mac.c | 47 +++++++++++++++++++++--- 1 file changed, 42 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/realtek/rtw88/mac.c b/drivers/net/wireless/realtek/rtw88/mac.c index 2fcba43a6f72..44e07b61b9b9 100644 --- a/drivers/net/wireless/realtek/rtw88/mac.c +++ b/drivers/net/wireless/realtek/rtw88/mac.c @@ -61,6 +61,7 @@ EXPORT_SYMBOL(rtw_set_channel_mac); static int rtw_mac_pre_system_cfg(struct rtw_dev *rtwdev) { + unsigned int retry; u32 value32; u8 value8; @@ -78,6 +79,28 @@ static int rtw_mac_pre_system_cfg(struct rtw_dev *rtwdev) case RTW_HCI_TYPE_PCIE: rtw_write32_set(rtwdev, REG_HCI_OPT_CTRL, BIT_USB_SUS_DIS); break; + case RTW_HCI_TYPE_SDIO: + rtw_write8_clr(rtwdev, REG_SDIO_HSUS_CTRL, BIT_HCI_SUS_REQ); + + for (retry = 0; retry < RTW_PWR_POLLING_CNT; retry++) { + if (rtw_read8(rtwdev, REG_SDIO_HSUS_CTRL) & BIT_HCI_RESUME_RDY) + break; + + usleep_range(10, 50); + } + + if (retry == RTW_PWR_POLLING_CNT) { + rtw_err(rtwdev, "failed to poll REG_SDIO_HSUS_CTRL[1]"); + return -ETIMEDOUT; + } + + if (rtw_sdio_is_sdio30_supported(rtwdev)) + rtw_write8_set(rtwdev, REG_HCI_OPT_CTRL + 2, + BIT_SDIO_PAD_E5 >> 16); + else + rtw_write8_clr(rtwdev, REG_HCI_OPT_CTRL + 2, + BIT_SDIO_PAD_E5 >> 16); + break; case RTW_HCI_TYPE_USB: break; default: @@ -249,6 +272,7 @@ static int rtw_mac_power_switch(struct rtw_dev *rtwdev, bool pwr_on) { const struct rtw_chip_info *chip = rtwdev->chip; const struct rtw_pwr_seq_cmd **pwr_seq; + u32 imr = 0; u8 rpwm; bool cur_pwr; int ret; @@ -274,18 +298,24 @@ static int rtw_mac_power_switch(struct rtw_dev *rtwdev, bool pwr_on) if (pwr_on == cur_pwr) return -EALREADY; + if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_SDIO) { + imr = rtw_read32(rtwdev, REG_SDIO_HIMR); + rtw_write32(rtwdev, REG_SDIO_HIMR, 0); + } + if (!pwr_on) clear_bit(RTW_FLAG_POWERON, rtwdev->flags); pwr_seq = pwr_on ? chip->pwr_on_seq : chip->pwr_off_seq; ret = rtw_pwr_seq_parser(rtwdev, pwr_seq); - if (ret) - return ret; - if (pwr_on) + if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_SDIO) + rtw_write32(rtwdev, REG_SDIO_HIMR, imr); + + if (!ret && pwr_on) set_bit(RTW_FLAG_POWERON, rtwdev->flags); - return 0; + return ret; } static int __rtw_mac_init_system_cfg(struct rtw_dev *rtwdev) @@ -456,6 +486,9 @@ static void download_firmware_reg_backup(struct rtw_dev *rtwdev, rtw_write16(rtwdev, REG_FIFOPAGE_INFO_1, 0x200); rtw_write32(rtwdev, REG_RQPN_CTRL_2, bckp[bckp_idx - 1].val); + if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_SDIO) + rtw_read32(rtwdev, REG_SDIO_FREE_TXPG); + /* Disable beacon related functions */ tmp = rtw_read8(rtwdev, REG_BCN_CTRL); bckp[bckp_idx].len = 1; @@ -1068,8 +1101,12 @@ static int txdma_queue_mapping(struct rtw_dev *rtwdev) if (rtw_chip_wcpu_11ac(rtwdev)) rtw_write32(rtwdev, REG_H2CQ_CSR, BIT_H2CQ_FULL); - if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_USB) + if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_SDIO) { + rtw_read32(rtwdev, REG_SDIO_FREE_TXPG); + rtw_write32(rtwdev, REG_SDIO_TX_CTRL, 0); + } else if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_USB) { rtw_write8_set(rtwdev, REG_TXDMA_PQ_MAP, BIT_RXDMA_ARBBW_EN); + } return 0; }