+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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
- */
-
-#include <linux/delay.h>
-#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"
-
-/* Registers specific to this variant */
-#define CTL_SDIO_REGS 0x100
-#define CTL_CLK_AND_WAIT_CTL 0x138
-#define CTL_RESET_SDIO 0x1e0
-
-static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
-{
- sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
- sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-
- usleep_range(10000, 11000);
- sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
- usleep_range(10000, 11000);
-}
-
-static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
-{
- sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
- usleep_range(10000, 11000);
-
- sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
- sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-
- usleep_range(10000, 11000);
-}
-
-static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
- unsigned int new_clock)
-{
- unsigned int divisor;
- u32 clk = 0;
- int clk_sel;
-
- if (new_clock == 0) {
- tmio_mmc_clk_stop(host);
- return;
- }
-
- divisor = host->pdata->hclk / new_clock;
-
- /* bit7 set: 1/512, ... bit0 set: 1/4, all bits clear: 1/2 */
- clk_sel = (divisor <= 1);
- clk = clk_sel ? 0 : (roundup_pow_of_two(divisor) >> 2);
-
- host->pdata->set_clk_div(host->pdev, clk_sel);
-
- sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
- sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
- sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
- usleep_range(10000, 11000);
-
- tmio_mmc_clk_start(host);
-}
-
-static void tmio_mmc_reset(struct tmio_mmc_host *host, bool preserve)
-{
- sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
- usleep_range(10000, 11000);
- sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
- usleep_range(10000, 11000);
-}
-
-#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;
- }
-
- 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->set_clock = tmio_mmc_set_clock;
- host->reset = tmio_mmc_reset;
-
- 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%p irq %d\n", mmc_hostname(host->mmc), 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",
- .probe_type = PROBE_PREFER_ASYNCHRONOUS,
- .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");
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