diff options
Diffstat (limited to 'drivers/mmc/host/tmio_mmc.c')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c new file mode 100644 index 000000000..43a2ea5cf --- /dev/null +++ b/drivers/mmc/host/tmio_mmc.c @@ -0,0 +1,167 @@ +/* + * Driver for the MMC / SD / SDIO cell found in: + * + * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3 + * + * Copyright (C) 2017 Renesas Electronics Corporation + * Copyright (C) 2017 Horms Solutions, Simon Horman + * Copyright (C) 2007 Ian Molton + * Copyright (C) 2004 Ian Molton + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/device.h> +#include <linux/mfd/core.h> +#include <linux/mfd/tmio.h> +#include <linux/mmc/host.h> +#include <linux/module.h> +#include <linux/pagemap.h> +#include <linux/scatterlist.h> + +#include "tmio_mmc.h" + +#ifdef CONFIG_PM_SLEEP +static int tmio_mmc_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + const struct mfd_cell *cell = mfd_get_cell(pdev); + int ret; + + ret = pm_runtime_force_suspend(dev); + + /* Tell MFD core it can disable us now.*/ + if (!ret && cell->disable) + cell->disable(pdev); + + return ret; +} + +static int tmio_mmc_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + const struct mfd_cell *cell = mfd_get_cell(pdev); + int ret = 0; + + /* Tell the MFD core we are ready to be enabled */ + if (cell->resume) + ret = cell->resume(pdev); + + if (!ret) + ret = pm_runtime_force_resume(dev); + + return ret; +} +#endif + +static int tmio_mmc_probe(struct platform_device *pdev) +{ + const struct mfd_cell *cell = mfd_get_cell(pdev); + struct tmio_mmc_data *pdata; + struct tmio_mmc_host *host; + struct resource *res; + int ret = -EINVAL, irq; + + if (pdev->num_resources != 2) + goto out; + + pdata = pdev->dev.platform_data; + if (!pdata || !pdata->hclk) + goto out; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + ret = irq; + goto out; + } + + /* Tell the MFD core we are ready to be enabled */ + if (cell->enable) { + ret = cell->enable(pdev); + if (ret) + goto out; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + ret = -EINVAL; + goto cell_disable; + } + + pdata->flags |= TMIO_MMC_HAVE_HIGH_REG; + + host = tmio_mmc_host_alloc(pdev, pdata); + if (IS_ERR(host)) { + ret = PTR_ERR(host); + goto cell_disable; + } + + /* SD control register space size is 0x200, 0x400 for bus_shift=1 */ + host->bus_shift = resource_size(res) >> 10; + + host->mmc->f_max = pdata->hclk; + host->mmc->f_min = pdata->hclk / 512; + + ret = tmio_mmc_host_probe(host); + if (ret) + goto host_free; + + ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, + IRQF_TRIGGER_FALLING, + dev_name(&pdev->dev), host); + if (ret) + goto host_remove; + + pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc), + (unsigned long)host->ctl, irq); + + return 0; + +host_remove: + tmio_mmc_host_remove(host); +host_free: + tmio_mmc_host_free(host); +cell_disable: + if (cell->disable) + cell->disable(pdev); +out: + return ret; +} + +static int tmio_mmc_remove(struct platform_device *pdev) +{ + const struct mfd_cell *cell = mfd_get_cell(pdev); + struct tmio_mmc_host *host = platform_get_drvdata(pdev); + + tmio_mmc_host_remove(host); + if (cell->disable) + cell->disable(pdev); + + return 0; +} + +/* ------------------- device registration ----------------------- */ + +static const struct dev_pm_ops tmio_mmc_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_suspend, tmio_mmc_resume) + SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend, + tmio_mmc_host_runtime_resume, NULL) +}; + +static struct platform_driver tmio_mmc_driver = { + .driver = { + .name = "tmio-mmc", + .pm = &tmio_mmc_dev_pm_ops, + }, + .probe = tmio_mmc_probe, + .remove = tmio_mmc_remove, +}; + +module_platform_driver(tmio_mmc_driver); + +MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver"); +MODULE_AUTHOR("Ian Molton <spyro@f2s.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:tmio-mmc"); |