Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mmc / host / sdhci-dove.c

diff --git a/kernel/drivers/mmc/host/sdhci-dove.c b/kernel/drivers/mmc/host/sdhci-dove.c
new file mode 100644 (file)
index 0000000..407c21f
--- /dev/null
+++ b/kernel/drivers/mmc/host/sdhci-dove.c
@@ -0,0 +1,132 @@
+/*
+ * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
+ *
+ * Author: Saeed Bishara <saeed@marvell.com>
+ *        Mike Rapoport <mike@compulab.co.il>
+ * Based on sdhci-cns3xxx.c
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/mmc/host.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#include "sdhci-pltfm.h"
+
+static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
+{
+       u16 ret;
+
+       switch (reg) {
+       case SDHCI_HOST_VERSION:
+       case SDHCI_SLOT_INT_STATUS:
+               /* those registers don't exist */
+               return 0;
+       default:
+               ret = readw(host->ioaddr + reg);
+       }
+       return ret;
+}
+
+static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
+{
+       u32 ret;
+
+       ret = readl(host->ioaddr + reg);
+
+       switch (reg) {
+       case SDHCI_CAPABILITIES:
+               /* Mask the support for 3.0V */
+               ret &= ~SDHCI_CAN_VDD_300;
+               break;
+       }
+       return ret;
+}
+
+static const struct sdhci_ops sdhci_dove_ops = {
+       .read_w = sdhci_dove_readw,
+       .read_l = sdhci_dove_readl,
+       .set_clock = sdhci_set_clock,
+       .set_bus_width = sdhci_set_bus_width,
+       .reset = sdhci_reset,
+       .set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_pltfm_data sdhci_dove_pdata = {
+       .ops    = &sdhci_dove_ops,
+       .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
+                 SDHCI_QUIRK_NO_BUSY_IRQ |
+                 SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
+                 SDHCI_QUIRK_FORCE_DMA |
+                 SDHCI_QUIRK_NO_HISPD_BIT,
+};
+
+static int sdhci_dove_probe(struct platform_device *pdev)
+{
+       struct sdhci_host *host;
+       struct sdhci_pltfm_host *pltfm_host;
+       int ret;
+
+       host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0);
+       if (IS_ERR(host))
+               return PTR_ERR(host);
+
+       pltfm_host = sdhci_priv(host);
+       pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
+
+       if (!IS_ERR(pltfm_host->clk))
+               clk_prepare_enable(pltfm_host->clk);
+
+       ret = mmc_of_parse(host->mmc);
+       if (ret)
+               goto err_sdhci_add;
+
+       ret = sdhci_add_host(host);
+       if (ret)
+               goto err_sdhci_add;
+
+       return 0;
+
+err_sdhci_add:
+       clk_disable_unprepare(pltfm_host->clk);
+       sdhci_pltfm_free(pdev);
+       return ret;
+}
+
+static const struct of_device_id sdhci_dove_of_match_table[] = {
+       { .compatible = "marvell,dove-sdhci", },
+       {}
+};
+MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);
+
+static struct platform_driver sdhci_dove_driver = {
+       .driver         = {
+               .name   = "sdhci-dove",
+               .pm     = SDHCI_PLTFM_PMOPS,
+               .of_match_table = sdhci_dove_of_match_table,
+       },
+       .probe          = sdhci_dove_probe,
+       .remove         = sdhci_pltfm_unregister,
+};
+
+module_platform_driver(sdhci_dove_driver);
+
+MODULE_DESCRIPTION("SDHCI driver for Dove");
+MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
+             "Mike Rapoport <mike@compulab.co.il>");
+MODULE_LICENSE("GPL v2");