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Message-ID: <b8bc96ee-e035-7a51-499f-b16dc3c7edd0@intel.com>
Date: Fri, 27 Jul 2018 09:20:13 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Srinath Mannam <srinath.mannam@...adcom.com>,
Ulf Hansson <ulf.hansson@...aro.org>,
Ray Jui <rjui@...adcom.com>,
Scott Branden <sbranden@...adcom.com>,
Jon Mason <jonmason@...adcom.com>
Cc: bcm-kernel-feedback-list@...adcom.com, linux-mmc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mmc: host: iproc: Add ACPI support to IPROC SDHCI
On 17/07/18 19:45, Srinath Mannam wrote:
> Add ACPI support to all IPROC SDHCI varients
>
> Signed-off-by: Srinath Mannam <srinath.mannam@...adcom.com>
> Reviewed-by: Ray Jui <ray.jui@...adcom.com>
> Reviewed-by: Scott Branden <scott.branden@...adcom.com>
> Reviewed-by: Vladimir Olovyannikov <vladimir.olovyannikov@...adcom.com>
> ---
> drivers/mmc/host/Kconfig | 1 +
> drivers/mmc/host/sdhci-iproc.c | 187 ++++++++++++++++++++++++++++-------------
> 2 files changed, 128 insertions(+), 60 deletions(-)
>
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 0581c19..bc6702e 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -334,6 +334,7 @@ config MMC_SDHCI_IPROC
> tristate "SDHCI support for the BCM2835 & iProc SD/MMC Controller"
> depends on ARCH_BCM2835 || ARCH_BCM_IPROC || COMPILE_TEST
> depends on MMC_SDHCI_PLTFM
> + depends on OF || ACPI
> default ARCH_BCM_IPROC
> select MMC_SDHCI_IO_ACCESSORS
> help
> diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
> index d0e83db..7c5c923 100644
> --- a/drivers/mmc/host/sdhci-iproc.c
> +++ b/drivers/mmc/host/sdhci-iproc.c
> @@ -15,6 +15,7 @@
> * iProc SDHCI platform driver
> */
>
> +#include <linux/acpi.h>
> #include <linux/delay.h>
> #include <linux/module.h>
> #include <linux/mmc/host.h>
> @@ -162,9 +163,19 @@ static void sdhci_iproc_writeb(struct sdhci_host *host, u8 val, int reg)
> sdhci_iproc_writel(host, newval, reg & ~3);
> }
>
> +static unsigned int sdhci_iproc_get_max_clock(struct sdhci_host *host)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +
> + if (pltfm_host->clk)
> + return sdhci_pltfm_clk_get_max_clock(host);
> + else
> + return pltfm_host->clock;
> +}
> +
> static const struct sdhci_ops sdhci_iproc_ops = {
> .set_clock = sdhci_set_clock,
> - .get_max_clock = sdhci_pltfm_clk_get_max_clock,
> + .get_max_clock = sdhci_iproc_get_max_clock,
> .set_bus_width = sdhci_set_bus_width,
> .reset = sdhci_reset,
> .set_uhs_signaling = sdhci_set_uhs_signaling,
> @@ -178,34 +189,24 @@ static const struct sdhci_ops sdhci_iproc_32only_ops = {
> .write_w = sdhci_iproc_writew,
> .write_b = sdhci_iproc_writeb,
> .set_clock = sdhci_set_clock,
> - .get_max_clock = sdhci_pltfm_clk_get_max_clock,
> + .get_max_clock = sdhci_iproc_get_max_clock,
> .set_bus_width = sdhci_set_bus_width,
> .reset = sdhci_reset,
> .set_uhs_signaling = sdhci_set_uhs_signaling,
> };
>
> +enum sdhci_pltfm_type {
> + SDHCI_PLTFM_IPROC_CYGNUS,
> + SDHCI_PLTFM_IPROC,
> + SDHCI_PLTFM_BCM2835,
> +};
> +
> static const struct sdhci_pltfm_data sdhci_iproc_cygnus_pltfm_data = {
> .quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK,
> .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | SDHCI_QUIRK2_HOST_OFF_CARD_ON,
> .ops = &sdhci_iproc_32only_ops,
> };
>
> -static const struct sdhci_iproc_data iproc_cygnus_data = {
> - .pdata = &sdhci_iproc_cygnus_pltfm_data,
> - .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
> - & SDHCI_MAX_BLOCK_MASK) |
> - SDHCI_CAN_VDD_330 |
> - SDHCI_CAN_VDD_180 |
> - SDHCI_CAN_DO_SUSPEND |
> - SDHCI_CAN_DO_HISPD |
> - SDHCI_CAN_DO_ADMA2 |
> - SDHCI_CAN_DO_SDMA,
> - .caps1 = SDHCI_DRIVER_TYPE_C |
> - SDHCI_DRIVER_TYPE_D |
> - SDHCI_SUPPORT_DDR50,
> - .mmc_caps = MMC_CAP_1_8V_DDR,
> -};
> -
> static const struct sdhci_pltfm_data sdhci_iproc_pltfm_data = {
> .quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
> SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
> @@ -213,21 +214,6 @@ static const struct sdhci_pltfm_data sdhci_iproc_pltfm_data = {
> .ops = &sdhci_iproc_ops,
> };
>
> -static const struct sdhci_iproc_data iproc_data = {
> - .pdata = &sdhci_iproc_pltfm_data,
> - .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
> - & SDHCI_MAX_BLOCK_MASK) |
> - SDHCI_CAN_VDD_330 |
> - SDHCI_CAN_VDD_180 |
> - SDHCI_CAN_DO_SUSPEND |
> - SDHCI_CAN_DO_HISPD |
> - SDHCI_CAN_DO_ADMA2 |
> - SDHCI_CAN_DO_SDMA,
> - .caps1 = SDHCI_DRIVER_TYPE_C |
> - SDHCI_DRIVER_TYPE_D |
> - SDHCI_SUPPORT_DDR50,
> -};
> -
> static const struct sdhci_pltfm_data sdhci_bcm2835_pltfm_data = {
> .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
> SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
> @@ -237,38 +223,104 @@ static const struct sdhci_pltfm_data sdhci_bcm2835_pltfm_data = {
> .ops = &sdhci_iproc_32only_ops,
> };
>
> -static const struct sdhci_iproc_data bcm2835_data = {
> - .pdata = &sdhci_bcm2835_pltfm_data,
> - .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
> - & SDHCI_MAX_BLOCK_MASK) |
> - SDHCI_CAN_VDD_330 |
> - SDHCI_CAN_DO_HISPD,
> - .caps1 = SDHCI_DRIVER_TYPE_A |
> - SDHCI_DRIVER_TYPE_C,
> - .mmc_caps = 0x00000000,
> +static const struct sdhci_iproc_data sdhci_iproc_data_list[] = {
Why change to an array? Also would need to be a separate patch.
> + [SDHCI_PLTFM_IPROC_CYGNUS] = {
> + /* SDHCI IPROC CYGNUS */
> + .pdata = &sdhci_iproc_cygnus_pltfm_data,
> + .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
> + & SDHCI_MAX_BLOCK_MASK) |
> + SDHCI_CAN_VDD_330 |
> + SDHCI_CAN_VDD_180 |
> + SDHCI_CAN_DO_SUSPEND |
> + SDHCI_CAN_DO_HISPD |
> + SDHCI_CAN_DO_ADMA2 |
> + SDHCI_CAN_DO_SDMA,
> + .caps1 = SDHCI_DRIVER_TYPE_C |
> + SDHCI_DRIVER_TYPE_D |
> + SDHCI_SUPPORT_DDR50,
> + .mmc_caps = MMC_CAP_1_8V_DDR,
> + },
> + [SDHCI_PLTFM_IPROC] = {
> + /* SDHCI IPROC */
> + .pdata = &sdhci_iproc_pltfm_data,
> + .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
> + & SDHCI_MAX_BLOCK_MASK) |
> + SDHCI_CAN_VDD_330 |
> + SDHCI_CAN_VDD_180 |
> + SDHCI_CAN_DO_SUSPEND |
> + SDHCI_CAN_DO_HISPD |
> + SDHCI_CAN_DO_ADMA2 |
> + SDHCI_CAN_DO_SDMA,
> + .caps1 = SDHCI_DRIVER_TYPE_C |
> + SDHCI_DRIVER_TYPE_D |
> + SDHCI_SUPPORT_DDR50,
> + },
> + [SDHCI_PLTFM_BCM2835] = {
> + /* SDHCI BCM2835 */
> + .pdata = &sdhci_bcm2835_pltfm_data,
> + .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
> + & SDHCI_MAX_BLOCK_MASK) |
> + SDHCI_CAN_VDD_330 |
> + SDHCI_CAN_DO_HISPD,
> + .caps1 = SDHCI_DRIVER_TYPE_A |
> + SDHCI_DRIVER_TYPE_C,
> + .mmc_caps = 0x00000000,
> +
> + },
> };
>
> static const struct of_device_id sdhci_iproc_of_match[] = {
> - { .compatible = "brcm,bcm2835-sdhci", .data = &bcm2835_data },
> - { .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_cygnus_data},
> - { .compatible = "brcm,sdhci-iproc", .data = &iproc_data },
> + {
> + .compatible = "brcm,bcm2835-sdhci",
> + .data = (void *)SDHCI_PLTFM_BCM2835
> + },
> + {
> + .compatible = "brcm,sdhci-iproc-cygnus",
> + .data = (void *)SDHCI_PLTFM_IPROC_CYGNUS
> + },
> + {
> + .compatible = "brcm,sdhci-iproc",
> + .data = (void *)SDHCI_PLTFM_IPROC
> + },
> { }
> };
> MODULE_DEVICE_TABLE(of, sdhci_iproc_of_match);
>
> +static const struct acpi_device_id sdhci_iproc_acpi_ids[] = {
> + { .id = "BRCM5871", .driver_data = SDHCI_PLTFM_IPROC_CYGNUS },
> + { .id = "BRCM5872", .driver_data = SDHCI_PLTFM_IPROC },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(acpi, sdhci_iproc_acpi_ids);
> +
> static int sdhci_iproc_probe(struct platform_device *pdev)
> {
> + struct device *dev = &pdev->dev;
> const struct of_device_id *match;
> + const struct acpi_device_id *acpi_id;
> const struct sdhci_iproc_data *iproc_data;
> struct sdhci_host *host;
> struct sdhci_iproc_host *iproc_host;
> struct sdhci_pltfm_host *pltfm_host;
> int ret;
> + enum sdhci_pltfm_type plat_type;
> +
> + if (dev->of_node) {
> + match = of_match_device(sdhci_iproc_of_match, dev);
> + if (match)
> + plat_type = (enum sdhci_pltfm_type)match->data;
> + else
> + return -ENODEV;
> + } else if (has_acpi_companion(dev)) {
> + acpi_id = acpi_match_device(sdhci_iproc_acpi_ids, dev);
> + if (acpi_id)
> + plat_type = (enum sdhci_pltfm_type)acpi_id->driver_data;
> + else
> + return -ENODEV;
> + } else
> + return -ENODEV;
>
> - match = of_match_device(sdhci_iproc_of_match, &pdev->dev);
> - if (!match)
> - return -EINVAL;
> - iproc_data = match->data;
> + iproc_data = &sdhci_iproc_data_list[plat_type];
>
> host = sdhci_pltfm_init(pdev, iproc_data->pdata, sizeof(*iproc_host));
> if (IS_ERR(host))
> @@ -284,17 +336,30 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
>
> host->mmc->caps |= iproc_host->data->mmc_caps;
>
> - pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
> - if (IS_ERR(pltfm_host->clk)) {
> - ret = PTR_ERR(pltfm_host->clk);
> - goto err;
> - }
> - ret = clk_prepare_enable(pltfm_host->clk);
> - if (ret) {
> - dev_err(&pdev->dev, "failed to enable host clk\n");
> - goto err;
> + if (dev->of_node) {
> + pltfm_host->clk = devm_clk_get(dev, NULL);
> + if (IS_ERR(pltfm_host->clk)) {
> + ret = PTR_ERR(pltfm_host->clk);
> + goto err;
> + }
> + ret = clk_prepare_enable(pltfm_host->clk);
> + if (ret) {
> + dev_err(dev, "failed to enable host clk\n");
> + goto err;
> + }
> + } else if (has_acpi_companion(dev)) {
> + /*
> + * When Driver probe with ACPI device, clock devices
> + * are not available, so sdhci clock get from
> + * clock-frequency property given in _DSD object.
> + */
> + device_property_read_u32(dev, "clock-frequency",
> + &pltfm_host->clock);
Is this a new property, or is it documented? Did you consider enhancing
__sdhci_read_caps() and using the existing "sdhci-caps" and
"sdhci-caps-mask" properties?
> + if (!pltfm_host->clock) {
> + ret = -ENODEV;
> + goto err;
> + }
> }
> -
> if (iproc_host->data->pdata->quirks & SDHCI_QUIRK_MISSING_CAPS) {
> host->caps = iproc_host->data->caps;
> host->caps1 = iproc_host->data->caps1;
> @@ -307,7 +372,8 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
> return 0;
>
> err_clk:
> - clk_disable_unprepare(pltfm_host->clk);
> + if (dev->of_node)
> + clk_disable_unprepare(pltfm_host->clk);
> err:
> sdhci_pltfm_free(pdev);
> return ret;
> @@ -317,6 +383,7 @@ static struct platform_driver sdhci_iproc_driver = {
> .driver = {
> .name = "sdhci-iproc",
> .of_match_table = sdhci_iproc_of_match,
> + .acpi_match_table = ACPI_PTR(sdhci_iproc_acpi_ids),
> .pm = &sdhci_pltfm_pmops,
> },
> .probe = sdhci_iproc_probe,
>
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