linux-kernel - [PATCH v7 3/3] mmc: rtsx: add rts5264 to support sd express card

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Date:   Fri, 8 Dec 2023 11:21:45 +0800
From:   Ricky Wu <ricky_wu@...ltek.com>
To:     <arnd@...db.de>, <gregkh@...uxfoundation.org>,
        <linux-kernel@...r.kernel.org>, <ulf.hansson@...aro.org>,
        <frank.li@...o.com>, <u.kleine-koenig@...gutronix.de>,
        <linux-mmc@...r.kernel.org>
CC:     <ricky_wu@...ltek.com>
Subject: [PATCH v7 3/3] mmc: rtsx: add rts5264 to support sd express card

rts5264 can support sd express card, so add the id in sd express card init
to do rts5264 register setting when the sd express card insert

Signed-off-by: Ricky Wu <ricky_wu@...ltek.com>
---
v3: split up mmc part from v2 patch
v4: split new definition up from v3
---
---
 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