-/*
- * 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/mfd/core.h>
-#include <linux/mfd/tmio.h>
-#include <linux/mfd/sh_mobile_sdhi.h>
-#include <linux/sh_dma.h>
-
-struct sh_mobile_sdhi {
- struct clk *clk;
- struct tmio_mmc_data mmc_data;
- struct mfd_cell cell_mmc;
- struct sh_dmae_slave param_tx;
- struct sh_dmae_slave param_rx;
- struct tmio_mmc_dma dma_priv;
-};
-
-static struct resource sh_mobile_sdhi_resources[] = {
- {
- .start = 0x000,
- .end = 0x1ff,
- .flags = IORESOURCE_MEM,
- },
- {
- .start = 0,
- .end = 0,
- .flags = IORESOURCE_IRQ,
- },
-};
-
-static struct mfd_cell sh_mobile_sdhi_cell = {
- .name = "tmio-mmc",
- .num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources),
- .resources = sh_mobile_sdhi_resources,
-};
-
-static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state)
-{
- struct platform_device *pdev = to_platform_device(tmio->dev.parent);
- 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 *tmio)
-{
- struct platform_device *pdev = to_platform_device(tmio->dev.parent);
- 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 resource *mem;
- char clk_name[8];
- int ret, irq;
-
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!mem)
- dev_err(&pdev->dev, "missing MEM resource\n");
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- dev_err(&pdev->dev, "missing IRQ resource\n");
-
- if (!mem || (irq < 0))
- return -EINVAL;
-
- 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);
- kfree(priv);
- return ret;
- }
-
- 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;
- }
-
- /*
- * 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;
-
- if (p && 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;
- }
-
- memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
- priv->cell_mmc.mfd_data = mmc_data;
-
- platform_set_drvdata(pdev, priv);
-
- ret = mfd_add_devices(&pdev->dev, pdev->id,
- &priv->cell_mmc, 1, mem, irq);
- if (ret) {
- clk_disable(priv->clk);
- clk_put(priv->clk);
- kfree(priv);
- }
-
- return ret;
-}
-
-static int sh_mobile_sdhi_remove(struct platform_device *pdev)
-{
- struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev);
-
- mfd_remove_devices(&pdev->dev);
- 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");
projects / firefly-linux-kernel-4.4.55.git / commitdiff