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Date: Fri, 15 May 2020 09:09:10 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Ben Chuang <benchuanggli@...il.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>,
"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
greg.tu@...esyslogic.com.tw,
Ben Chuang <ben.chuang@...esyslogic.com.tw>
Subject: Re: [PATCH] mmc: sdhci-pci-gli: Add Genesys Logic GL9763E support
On Fri, 8 May 2020 at 08:42, Ben Chuang <benchuanggli@...il.com> wrote:
>
> From: Ben Chuang <ben.chuang@...esyslogic.com.tw>
>
> GL9763E supports High Speed SDR, High Speed DDR, HS200, HS400, Enhanced
> Strobe in HS400 mode, 1/4/8 bits data bus and 3.3/1.8V.
>
> Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
Applied for next, thanks!
Kind regards
Uffe
> ---
> drivers/mmc/host/sdhci-pci-core.c | 1 +
> drivers/mmc/host/sdhci-pci-gli.c | 106 ++++++++++++++++++++++++++++++
> drivers/mmc/host/sdhci-pci.h | 2 +
> 3 files changed, 109 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index af736afb4b91..bb6802448b2f 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -1745,6 +1745,7 @@ static const struct pci_device_id pci_ids[] = {
> SDHCI_PCI_DEVICE(SYNOPSYS, DWC_MSHC, snps),
> SDHCI_PCI_DEVICE(GLI, 9750, gl9750),
> SDHCI_PCI_DEVICE(GLI, 9755, gl9755),
> + SDHCI_PCI_DEVICE(GLI, 9763E, gl9763e),
> 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-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> index fd76aa672e02..ca0166d9bf82 100644
> --- a/drivers/mmc/host/sdhci-pci-gli.c
> +++ b/drivers/mmc/host/sdhci-pci-gli.c
> @@ -63,6 +63,19 @@
> #define SDHCI_GLI_9750_TUNING_PARAMETERS_RX_DLY GENMASK(2, 0)
> #define GLI_9750_TUNING_PARAMETERS_RX_DLY_VALUE 0x1
>
> +#define SDHCI_GLI_9763E_CTRL_HS400 0x7
> +
> +#define SDHCI_GLI_9763E_HS400_ES_REG 0x52C
> +#define SDHCI_GLI_9763E_HS400_ES_BIT BIT(8)
> +
> +#define PCIE_GLI_9763E_VHS 0x884
> +#define GLI_9763E_VHS_REV GENMASK(19, 16)
> +#define GLI_9763E_VHS_REV_R 0x0
> +#define GLI_9763E_VHS_REV_M 0x1
> +#define GLI_9763E_VHS_REV_W 0x2
> +#define PCIE_GLI_9763E_SCR 0x8E0
> +#define GLI_9763E_SCR_AXI_REQ BIT(9)
> +
> #define GLI_MAX_TUNING_LOOP 40
>
> /* Genesys Logic chipset */
> @@ -351,6 +364,81 @@ static int sdhci_pci_gli_resume(struct sdhci_pci_chip *chip)
> }
> #endif
>
> +static void gl9763e_hs400_enhanced_strobe(struct mmc_host *mmc,
> + struct mmc_ios *ios)
> +{
> + struct sdhci_host *host = mmc_priv(mmc);
> + u32 val;
> +
> + val = sdhci_readl(host, SDHCI_GLI_9763E_HS400_ES_REG);
> + if (ios->enhanced_strobe)
> + val |= SDHCI_GLI_9763E_HS400_ES_BIT;
> + else
> + val &= ~SDHCI_GLI_9763E_HS400_ES_BIT;
> +
> + sdhci_writel(host, val, SDHCI_GLI_9763E_HS400_ES_REG);
> +}
> +
> +static void sdhci_set_gl9763e_signaling(struct sdhci_host *host,
> + unsigned int timing)
> +{
> + u16 ctrl_2;
> +
> + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
> + ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
> + if (timing == MMC_TIMING_MMC_HS200)
> + ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
> + else if (timing == MMC_TIMING_MMC_HS)
> + ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
> + else if (timing == MMC_TIMING_MMC_DDR52)
> + ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
> + else if (timing == MMC_TIMING_MMC_HS400)
> + ctrl_2 |= SDHCI_GLI_9763E_CTRL_HS400;
> +
> + sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
> +}
> +
> +static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
> +{
> + struct pci_dev *pdev = slot->chip->pdev;
> + u32 value;
> +
> + pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
> + value &= ~GLI_9763E_VHS_REV;
> + value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_W);
> + pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value);
> +
> + pci_read_config_dword(pdev, PCIE_GLI_9763E_SCR, &value);
> + value |= GLI_9763E_SCR_AXI_REQ;
> + pci_write_config_dword(pdev, PCIE_GLI_9763E_SCR, value);
> +
> + pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
> + value &= ~GLI_9763E_VHS_REV;
> + value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_R);
> + pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value);
> +}
> +
> +static int gli_probe_slot_gl9763e(struct sdhci_pci_slot *slot)
> +{
> + struct sdhci_host *host = slot->host;
> +
> + host->mmc->caps |= MMC_CAP_8_BIT_DATA |
> + MMC_CAP_1_8V_DDR |
> + MMC_CAP_NONREMOVABLE;
> + host->mmc->caps2 |= MMC_CAP2_HS200_1_8V_SDR |
> + MMC_CAP2_HS400_1_8V |
> + MMC_CAP2_HS400_ES |
> + MMC_CAP2_NO_SDIO |
> + MMC_CAP2_NO_SD;
> + gli_pcie_enable_msi(slot);
> + host->mmc_host_ops.hs400_enhanced_strobe =
> + gl9763e_hs400_enhanced_strobe;
> + gli_set_gl9763e(slot);
> + sdhci_enable_v4_mode(host);
> +
> + return 0;
> +}
> +
> static const struct sdhci_ops sdhci_gl9755_ops = {
> .set_clock = sdhci_set_clock,
> .enable_dma = sdhci_pci_enable_dma,
> @@ -390,3 +478,21 @@ const struct sdhci_pci_fixes sdhci_gl9750 = {
> .resume = sdhci_pci_gli_resume,
> #endif
> };
> +
> +static const struct sdhci_ops sdhci_gl9763e_ops = {
> + .set_clock = sdhci_set_clock,
> + .enable_dma = sdhci_pci_enable_dma,
> + .set_bus_width = sdhci_set_bus_width,
> + .reset = sdhci_reset,
> + .set_uhs_signaling = sdhci_set_gl9763e_signaling,
> + .voltage_switch = sdhci_gli_voltage_switch,
> +};
> +
> +const struct sdhci_pci_fixes sdhci_gl9763e = {
> + .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
> + .probe_slot = gli_probe_slot_gl9763e,
> + .ops = &sdhci_gl9763e_ops,
> +#ifdef CONFIG_PM_SLEEP
> + .resume = sdhci_pci_gli_resume,
> +#endif
> +};
> diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
> index 42ccd123b046..d0ed232af0eb 100644
> --- a/drivers/mmc/host/sdhci-pci.h
> +++ b/drivers/mmc/host/sdhci-pci.h
> @@ -72,6 +72,7 @@
>
> #define PCI_DEVICE_ID_GLI_9755 0x9755
> #define PCI_DEVICE_ID_GLI_9750 0x9750
> +#define PCI_DEVICE_ID_GLI_9763E 0xe763
>
> /*
> * PCI device class and mask
> @@ -195,5 +196,6 @@ extern const struct sdhci_pci_fixes sdhci_snps;
> extern const struct sdhci_pci_fixes sdhci_o2;
> extern const struct sdhci_pci_fixes sdhci_gl9750;
> extern const struct sdhci_pci_fixes sdhci_gl9755;
> +extern const struct sdhci_pci_fixes sdhci_gl9763e;
>
> #endif /* __SDHCI_PCI_H */
> --
> 2.26.2
>
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