diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-iproc.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-iproc.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c index ddeaf8e1f72f..e7565c671998 100644 --- a/drivers/mmc/host/sdhci-iproc.c +++ b/drivers/mmc/host/sdhci-iproc.c @@ -173,6 +173,23 @@ static unsigned int sdhci_iproc_get_max_clock(struct sdhci_host *host) return pltfm_host->clock; } +/* + * There is a known bug on BCM2711's SDHCI core integration where the + * controller will hang when the difference between the core clock and the bus + * clock is too great. Specifically this can be reproduced under the following + * conditions: + * + * - No SD card plugged in, polling thread is running, probing cards at + * 100 kHz. + * - BCM2711's core clock configured at 500MHz or more + * + * So we set 200kHz as the minimum clock frequency available for that SoC. + */ +static unsigned int sdhci_iproc_bcm2711_get_min_clock(struct sdhci_host *host) +{ + return 200000; +} + static const struct sdhci_ops sdhci_iproc_ops = { .set_clock = sdhci_set_clock, .get_max_clock = sdhci_iproc_get_max_clock, @@ -271,13 +288,15 @@ static const struct sdhci_ops sdhci_iproc_bcm2711_ops = { .set_clock = sdhci_set_clock, .set_power = sdhci_set_power_and_bus_voltage, .get_max_clock = sdhci_iproc_get_max_clock, + .get_min_clock = sdhci_iproc_bcm2711_get_min_clock, .set_bus_width = sdhci_set_bus_width, .reset = sdhci_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, }; static const struct sdhci_pltfm_data sdhci_bcm2711_pltfm_data = { - .quirks = SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12, + .quirks = SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 | + SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, .ops = &sdhci_iproc_bcm2711_ops, }; @@ -286,11 +305,35 @@ static const struct sdhci_iproc_data bcm2711_data = { .mmc_caps = MMC_CAP_3_3V_DDR, }; +static const struct sdhci_pltfm_data sdhci_bcm7211a0_pltfm_data = { + .quirks = SDHCI_QUIRK_MISSING_CAPS | + SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | + SDHCI_QUIRK_BROKEN_DMA | + SDHCI_QUIRK_BROKEN_ADMA, + .ops = &sdhci_iproc_ops, +}; + +#define BCM7211A0_BASE_CLK_MHZ 100 +static const struct sdhci_iproc_data bcm7211a0_data = { + .pdata = &sdhci_bcm7211a0_pltfm_data, + .caps = ((BCM7211A0_BASE_CLK_MHZ / 2) << SDHCI_TIMEOUT_CLK_SHIFT) | + (BCM7211A0_BASE_CLK_MHZ << SDHCI_CLOCK_BASE_SHIFT) | + ((0x2 << SDHCI_MAX_BLOCK_SHIFT) + & SDHCI_MAX_BLOCK_MASK) | + SDHCI_CAN_VDD_330 | + SDHCI_CAN_VDD_180 | + SDHCI_CAN_DO_SUSPEND | + SDHCI_CAN_DO_HISPD, + .caps1 = SDHCI_DRIVER_TYPE_C | + SDHCI_DRIVER_TYPE_D, +}; + static const struct of_device_id sdhci_iproc_of_match[] = { { .compatible = "brcm,bcm2835-sdhci", .data = &bcm2835_data }, { .compatible = "brcm,bcm2711-emmc2", .data = &bcm2711_data }, { .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_cygnus_data}, { .compatible = "brcm,sdhci-iproc", .data = &iproc_data }, + { .compatible = "brcm,bcm7211a0-sdhci", .data = &bcm7211a0_data }, { } }; MODULE_DEVICE_TABLE(of, sdhci_iproc_of_match); @@ -384,6 +427,11 @@ err: return ret; } +static void sdhci_iproc_shutdown(struct platform_device *pdev) +{ + sdhci_pltfm_suspend(&pdev->dev); +} + static struct platform_driver sdhci_iproc_driver = { .driver = { .name = "sdhci-iproc", @@ -394,6 +442,7 @@ static struct platform_driver sdhci_iproc_driver = { }, .probe = sdhci_iproc_probe, .remove = sdhci_pltfm_unregister, + .shutdown = sdhci_iproc_shutdown, }; module_platform_driver(sdhci_iproc_driver); |