diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/Makefile | 3 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci-pci-core.c | 1 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci-pci-dwc-mshc.c | 84 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci-pci.h | 3 |
4 files changed, 90 insertions, 1 deletions
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index a18fbba1b97e..ce8398e6f2c0 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -11,7 +11,8 @@ obj-$(CONFIG_MMC_MXC) += mxcmmc.o obj-$(CONFIG_MMC_MXS) += mxs-mmc.o obj-$(CONFIG_MMC_SDHCI) += sdhci.o obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o -sdhci-pci-y += sdhci-pci-core.o sdhci-pci-o2micro.o sdhci-pci-arasan.o +sdhci-pci-y += sdhci-pci-core.o sdhci-pci-o2micro.o sdhci-pci-arasan.o \ + sdhci-pci-dwc-mshc.o obj-$(subst m,y,$(CONFIG_MMC_SDHCI_PCI)) += sdhci-pci-data.o obj-$(CONFIG_MMC_SDHCI_ACPI) += sdhci-acpi.o obj-$(CONFIG_MMC_SDHCI_PXAV3) += sdhci-pxav3.o diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c index 3d367613275b..7bfd366d970d 100644 --- a/drivers/mmc/host/sdhci-pci-core.c +++ b/drivers/mmc/host/sdhci-pci-core.c @@ -1513,6 +1513,7 @@ static const struct pci_device_id pci_ids[] = { SDHCI_PCI_DEVICE(O2, SEABIRD0, o2), SDHCI_PCI_DEVICE(O2, SEABIRD1, o2), SDHCI_PCI_DEVICE(ARASAN, PHY_EMMC, arasan), + SDHCI_PCI_DEVICE(SYNOPSYS, DWC_MSHC, snps), SDHCI_PCI_DEVICE_CLASS(AMD, SYSTEM_SDHCI, PCI_CLASS_MASK, amd), /* Generic SD host controller */ {PCI_DEVICE_CLASS(SYSTEM_SDHCI, PCI_CLASS_MASK)}, diff --git a/drivers/mmc/host/sdhci-pci-dwc-mshc.c b/drivers/mmc/host/sdhci-pci-dwc-mshc.c new file mode 100644 index 000000000000..f78d65448d17 --- /dev/null +++ b/drivers/mmc/host/sdhci-pci-dwc-mshc.c @@ -0,0 +1,84 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SDHCI driver for Synopsys DWC_MSHC controller + * + * Copyright (C) 2018 Synopsys, Inc. (www.synopsys.com) + * + * Authors: + * Prabu Thangamuthu <prabu.t@synopsys.com> + * Manjunath M B <manjumb@synopsys.com> + */ + +#include "sdhci.h" +#include "sdhci-pci.h" + +#define SDHCI_VENDOR_PTR_R 0xE8 + +/* Synopsys vendor specific registers */ +#define SDHC_GPIO_OUT 0x34 +#define SDHC_AT_CTRL_R 0x40 +#define SDHC_SW_TUNE_EN 0x00000010 + +/* MMCM DRP */ +#define SDHC_MMCM_DIV_REG 0x1020 +#define DIV_REG_100_MHZ 0x1145 +#define DIV_REG_200_MHZ 0x1083 +#define SDHC_MMCM_CLKFBOUT 0x1024 +#define CLKFBOUT_100_MHZ 0x0000 +#define CLKFBOUT_200_MHZ 0x0080 +#define SDHC_CCLK_MMCM_RST 0x00000001 + +static void sdhci_snps_set_clock(struct sdhci_host *host, unsigned int clock) +{ + u16 clk; + u32 reg, vendor_ptr; + + vendor_ptr = sdhci_readw(host, SDHCI_VENDOR_PTR_R); + + /* Disable software managed rx tuning */ + reg = sdhci_readl(host, (SDHC_AT_CTRL_R + vendor_ptr)); + reg &= ~SDHC_SW_TUNE_EN; + sdhci_writel(host, reg, (SDHC_AT_CTRL_R + vendor_ptr)); + + if (clock <= 52000000) { + sdhci_set_clock(host, clock); + } else { + /* Assert reset to MMCM */ + reg = sdhci_readl(host, (SDHC_GPIO_OUT + vendor_ptr)); + reg |= SDHC_CCLK_MMCM_RST; + sdhci_writel(host, reg, (SDHC_GPIO_OUT + vendor_ptr)); + + /* Configure MMCM */ + if (clock == 100000000) { + sdhci_writel(host, DIV_REG_100_MHZ, SDHC_MMCM_DIV_REG); + sdhci_writel(host, CLKFBOUT_100_MHZ, + SDHC_MMCM_CLKFBOUT); + } else { + sdhci_writel(host, DIV_REG_200_MHZ, SDHC_MMCM_DIV_REG); + sdhci_writel(host, CLKFBOUT_200_MHZ, + SDHC_MMCM_CLKFBOUT); + } + + /* De-assert reset to MMCM */ + reg = sdhci_readl(host, (SDHC_GPIO_OUT + vendor_ptr)); + reg &= ~SDHC_CCLK_MMCM_RST; + sdhci_writel(host, reg, (SDHC_GPIO_OUT + vendor_ptr)); + + /* Enable clock */ + clk = SDHCI_PROG_CLOCK_MODE | SDHCI_CLOCK_INT_EN | + SDHCI_CLOCK_CARD_EN; + sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); + } +} + +static const struct sdhci_ops sdhci_snps_ops = { + .set_clock = sdhci_snps_set_clock, + .enable_dma = sdhci_pci_enable_dma, + .set_bus_width = sdhci_set_bus_width, + .reset = sdhci_reset, + .set_uhs_signaling = sdhci_set_uhs_signaling, +}; + +const struct sdhci_pci_fixes sdhci_snps = { + .ops = &sdhci_snps_ops, +}; diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h index 59af2886631f..2ef0bdca9197 100644 --- a/drivers/mmc/host/sdhci-pci.h +++ b/drivers/mmc/host/sdhci-pci.h @@ -61,6 +61,8 @@ #define PCI_VENDOR_ID_ARASAN 0x16e6 #define PCI_DEVICE_ID_ARASAN_PHY_EMMC 0x0670 +#define PCI_DEVICE_ID_SYNOPSYS_DWC_MSHC 0xc202 + /* * PCI device class and mask */ @@ -184,5 +186,6 @@ int sdhci_pci_o2_resume(struct sdhci_pci_chip *chip); #endif extern const struct sdhci_pci_fixes sdhci_arasan; +extern const struct sdhci_pci_fixes sdhci_snps; #endif /* __SDHCI_PCI_H */ |