linux-kernel - [PATCH v3 2/2] mmc: rtsx: add rts5264 to support sd express card

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Message-ID: <00a3624d0a0a482c80babc5dd7fc5d1e@realtek.com>
Date:   Fri, 20 Oct 2023 08:18:04 +0000
From:   Ricky WU <ricky_wu@...ltek.com>
To:     "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        "frank.li@...o.com" <frank.li@...o.com>,
        Ricky WU <ricky_wu@...ltek.com>,
        "u.kleine-koenig@...gutronix.de" <u.kleine-koenig@...gutronix.de>,
        "yangyingliang@...wei.com" <yangyingliang@...wei.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "arnd@...db.de" <arnd@...db.de>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Subject: [PATCH v3 2/2] mmc: rtsx: add rts5264 to support sd express card

add rts5264 register setting when sd express card insert

Signed-off-by: Ricky Wu <ricky_wu@...ltek.com>
---
v3: split up mmc part from v2 patch
---
 drivers/mmc/host/rtsx_pci_sdmmc.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index 87d78432a1e0..7dfe7c4e0077 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -7,6 +7,7 @@
  *   Wei WANG <wei_wang@...lsil.com.cn>
  */
 
+#include <linux/pci.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/highmem.h>
@@ -947,7 +948,7 @@ static int sd_power_on(struct realtek_pci_sdmmc *host, unsigned char power_mode)
 	/* send at least 74 clocks */
 	rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, SD_CLK_TOGGLE_EN);
 
-	if (PCI_PID(pcr) == PID_5261) {
+	if ((PCI_PID(pcr) == PID_5261) || (PCI_PID(pcr) == PID_5264)) {
 		/*
 		 * If test mode is set switch to SD Express mandatorily,
 		 * this is only for factory testing.
@@ -1364,6 +1365,14 @@ static int sdmmc_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
 	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
 	struct rtsx_pcr *pcr = host->pcr;
 
+	if (PCI_PID(pcr) == PID_5264) {
+		pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL2,
+				PCI_EXP_LNKCTL2_TLS, PCI_EXP_LNKCTL2_TLS_2_5GT);
+		pci_write_config_byte(pcr->pci, 0x80e, 0x02);
+		pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL2,
+				PCI_EXP_LNKCTL2_TLS, PCI_EXP_LNKCTL2_TLS_5_0GT);
+	}
+
 	/* Set relink_time for changing to PCIe card */
 	relink_time = 0x8FFF;
 
@@ -1379,6 +1388,12 @@ static int sdmmc_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
 	if (pcr->ops->disable_auto_blink)
 		pcr->ops->disable_auto_blink(pcr);
 
+	if (PCI_PID(pcr) == PID_5264) {
+		rtsx_pci_write_register(pcr, RTS5264_AUTOLOAD_CFG2,
+			RTS5264_CHIP_RST_N_SEL, RTS5264_CHIP_RST_N_SEL);
+		rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
+	}
+
 	/* For PCIe/NVMe mode can't enter delink issue */
 	pcr->hw_param.interrupt_en &= ~(SD_INT_EN);
 	rtsx_pci_writel(pcr, RTSX_BIER, pcr->hw_param.interrupt_en);
-- 
2.25.1