mmc: tmio: convert the SDHI MMC driver from MFD to a platform driver
On sh-mobile platforms the SDHI driver was using the tmio_mmc SD/SDIO
MFD cell driver. Now that the tmio_mmc driver has been split into a
core and a separate MFD glue, we can support SDHI natively without the
need to emulate an MFD controller. This also allows to support systems
with an on-SoC SDHI controller and a separate MFD with a TMIO core.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 4d16166..0b03cee 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -444,12 +444,19 @@
config MMC_TMIO
tristate "Toshiba Mobile IO Controller (TMIO) MMC/SD function support"
- depends on MFD_TMIO || MFD_ASIC3 || MFD_SH_MOBILE_SDHI
+ depends on MFD_TMIO || MFD_ASIC3
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 "SH-Mobile SDHI SD/SDIO controller support"
+ select MMC_TMIO_CORE
+ help
+ This provides support for the SDHI SD/SDIO controller found in
+ SuperH and ARM SH-Mobile SoCs
+
config MMC_CB710
tristate "ENE CB710 MMC/SD Interface support"
depends on PCI
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 79c42dd..4f1df0a 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -31,8 +31,11 @@
obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o
obj-$(CONFIG_MMC_TMIO_CORE) += tmio_mmc_core.o
tmio_mmc_core-y := tmio_mmc_pio.o
-tmio_mmc_core-$(CONFIG_TMIO_MMC_DMA) += tmio_mmc_dma.o
-obj-$(CONFIG_MMC_CB710) += cb710-mmc.o
+ifneq ($(CONFIG_MMC_SDHI),n)
+tmio_mmc_core-y += tmio_mmc_dma.o
+endif
+obj-$(CONFIG_MMC_SDHI) += sh_mobile_sdhi.o
+obj-$(CONFIG_MMC_CB710) += cb710-mmc.o
obj-$(CONFIG_MMC_VIA_SDMMC) += via-sdmmc.o
obj-$(CONFIG_SDH_BFIN) += bfin_sdh.o
obj-$(CONFIG_MMC_DW) += dw_mmc.o
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
new file mode 100644
index 0000000..cc70123
--- /dev/null
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -0,0 +1,171 @@
+/*
+ * SuperH Mobile SDHI
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * 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.
+ *
+ * Based on "Compaq ASIC3 support":
+ *
+ * Copyright 2001 Compaq Computer Corporation.
+ * Copyright 2004-2005 Phil Blundell
+ * Copyright 2007-2008 OpenedHand Ltd.
+ *
+ * Authors: Phil Blundell <pb@handhelds.org>,
+ * Samuel Ortiz <sameo@openedhand.com>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/sh_mobile_sdhi.h>
+#include <linux/mfd/tmio.h>
+#include <linux/sh_dma.h>
+
+#include "tmio_mmc.h"
+
+struct sh_mobile_sdhi {
+ struct clk *clk;
+ struct tmio_mmc_data mmc_data;
+ struct sh_dmae_slave param_tx;
+ struct sh_dmae_slave param_rx;
+ struct tmio_mmc_dma dma_priv;
+};
+
+static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state)
+{
+ struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+
+ if (p && p->set_pwr)
+ p->set_pwr(pdev, state);
+}
+
+static int sh_mobile_sdhi_get_cd(struct platform_device *pdev)
+{
+ struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+
+ if (p && p->get_cd)
+ return p->get_cd(pdev);
+ else
+ return -ENOSYS;
+}
+
+static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
+{
+ struct sh_mobile_sdhi *priv;
+ struct tmio_mmc_data *mmc_data;
+ struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+ struct tmio_mmc_host *host;
+ char clk_name[8];
+ int ret;
+
+ priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
+ if (priv == NULL) {
+ dev_err(&pdev->dev, "kzalloc failed\n");
+ return -ENOMEM;
+ }
+
+ mmc_data = &priv->mmc_data;
+
+ snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
+ priv->clk = clk_get(&pdev->dev, clk_name);
+ if (IS_ERR(priv->clk)) {
+ dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
+ ret = PTR_ERR(priv->clk);
+ goto eclkget;
+ }
+
+ clk_enable(priv->clk);
+
+ mmc_data->hclk = clk_get_rate(priv->clk);
+ mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
+ mmc_data->get_cd = sh_mobile_sdhi_get_cd;
+ mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
+ if (p) {
+ mmc_data->flags = p->tmio_flags;
+ mmc_data->ocr_mask = p->tmio_ocr_mask;
+ mmc_data->capabilities |= p->tmio_caps;
+
+ if (p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
+ priv->param_tx.slave_id = p->dma_slave_tx;
+ priv->param_rx.slave_id = p->dma_slave_rx;
+ priv->dma_priv.chan_priv_tx = &priv->param_tx;
+ priv->dma_priv.chan_priv_rx = &priv->param_rx;
+ priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
+ mmc_data->dma = &priv->dma_priv;
+ }
+ }
+
+ /*
+ * All SDHI blocks support 2-byte and larger block sizes in 4-bit
+ * bus width mode.
+ */
+ mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
+
+ /*
+ * All SDHI blocks support SDIO IRQ signalling.
+ */
+ mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
+
+ ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
+ if (ret < 0)
+ goto eprobe;
+
+ pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
+ (unsigned long)host->ctl, host->irq);
+
+ return ret;
+
+eprobe:
+ clk_disable(priv->clk);
+ clk_put(priv->clk);
+eclkget:
+ kfree(priv);
+ return ret;
+}
+
+static int sh_mobile_sdhi_remove(struct platform_device *pdev)
+{
+ struct mmc_host *mmc = platform_get_drvdata(pdev);
+ struct tmio_mmc_host *host = mmc_priv(mmc);
+ struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
+
+ tmio_mmc_host_remove(host);
+ clk_disable(priv->clk);
+ clk_put(priv->clk);
+ kfree(priv);
+
+ return 0;
+}
+
+static struct platform_driver sh_mobile_sdhi_driver = {
+ .driver = {
+ .name = "sh_mobile_sdhi",
+ .owner = THIS_MODULE,
+ },
+ .probe = sh_mobile_sdhi_probe,
+ .remove = __devexit_p(sh_mobile_sdhi_remove),
+};
+
+static int __init sh_mobile_sdhi_init(void)
+{
+ return platform_driver_register(&sh_mobile_sdhi_driver);
+}
+
+static void __exit sh_mobile_sdhi_exit(void)
+{
+ platform_driver_unregister(&sh_mobile_sdhi_driver);
+}
+
+module_init(sh_mobile_sdhi_init);
+module_exit(sh_mobile_sdhi_exit);
+
+MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:sh_mobile_sdhi");
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 8dedf0a..7d79b14 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -120,7 +120,7 @@
local_irq_restore(*flags);
}
-#ifdef CONFIG_TMIO_MMC_DMA
+#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
void tmio_mmc_release_dma(struct tmio_mmc_host *host);