mmc: remove tmio_mmc driver

With the TMIO MFD support gone, the corresponding MMC host driver can
be removed as well. The remaining tmio_mmc_core module however is still
used by both the Renesas and Socionext host drivers.

Cc: Ian Molton <spyro@f2s.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-mmc@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/mmc/host/Kconfig

@@ -655,14 +655,6 @@ config MMC_SDHCI_SPRD
 config MMC_TMIO_CORE
 	tristate
 
-config MMC_TMIO
-	tristate "Toshiba Mobile IO Controller (TMIO) MMC/SD function support"
-	depends on MFD_TMIO || MFD_ASIC3 || COMPILE_TEST
-	select MMC_TMIO_CORE
-	help
-	  This provides support for the SD/MMC cell found in TC6393XB,
-	  T7L66XB and also HTC ASIC3
-
 config MMC_SDHI
 	tristate "Renesas SDHI SD/SDIO controller support"
 	depends on SUPERH || ARCH_RENESAS || COMPILE_TEST

drivers/mmc/host/Makefile

@@ -35,7 +35,6 @@ obj-$(CONFIG_MMC_DAVINCI)       += davinci_mmc.o
 obj-$(CONFIG_MMC_SPI)		+= mmc_spi.o
 obj-$(CONFIG_MMC_SPI)		+= of_mmc_spi.o
 obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
-obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
 obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
 obj-$(CONFIG_MMC_SDHI)		+= renesas_sdhi_core.o
 obj-$(CONFIG_MMC_SDHI_SYS_DMAC)		+= renesas_sdhi_sys_dmac.o

drivers/mmc/host/tmio_mmc.c

-// 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");