1 files changed, 190 insertions, 0 deletions

diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
new file mode 100644
index 000000000000..eaba547ce26b
--- /dev/null
+++ b/drivers/usb/dwc2/platform.c
@@ -0,0 +1,190 @@
+/*
+ * platform.c - DesignWare HS OTG Controller platform driver
+ *
+ * Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include "core.h"
+#include "hcd.h"
+
+static const char dwc2_driver_name[] = "dwc2";
+
+static const struct dwc2_core_params params_bcm2835 = {
+        .otg_cap                        = 0,    /* HNP/SRP capable */
+        .otg_ver                        = 0,    /* 1.3 */
+        .dma_enable                     = 1,
+        .dma_desc_enable                = 0,
+        .speed                          = 0,    /* High Speed */
+        .enable_dynamic_fifo            = 1,
+        .en_multiple_tx_fifo            = 1,
+        .host_rx_fifo_size              = 774,  /* 774 DWORDs */
+        .host_nperio_tx_fifo_size       = 256,  /* 256 DWORDs */
+        .host_perio_tx_fifo_size        = 512,  /* 512 DWORDs */
+        .max_transfer_size              = 65535,
+        .max_packet_count               = 511,
+        .host_channels                  = 8,
+        .phy_type                       = 1,    /* UTMI */
+        .phy_utmi_width                 = 8,    /* 8 bits */
+        .phy_ulpi_ddr                   = 0,    /* Single */
+        .phy_ulpi_ext_vbus              = 0,
+        .i2c_enable                     = 0,
+        .ulpi_fs_ls                     = 0,
+        .host_support_fs_ls_low_power   = 0,
+        .host_ls_low_power_phy_clk      = 0,    /* 48 MHz */
+        .ts_dline                       = 0,
+        .reload_ctl                     = 0,
+        .ahbcfg                         = 0x10,
+        .uframe_sched                   = 0,
+};
+
+/**
+ * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
+ * DWC_otg driver
+ *
+ * @dev: Platform device
+ *
+ * This routine is called, for example, when the rmmod command is executed. The
+ * device may or may not be electrically present. If it is present, the driver
+ * stops device processing. Any resources used on behalf of this device are
+ * freed.
+ */
+static int dwc2_driver_remove(struct platform_device *dev)
+{
+        struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
+
+        dwc2_hcd_remove(hsotg);
+
+        return 0;
+}
+
+static const struct of_device_id dwc2_of_match_table[] = {
+        { .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },
+        { .compatible = "snps,dwc2", .data = NULL },
+        {},
+};
+MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
+
+/**
+ * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
+ * driver
+ *
+ * @dev: Platform device
+ *
+ * This routine creates the driver components required to control the device
+ * (core, HCD, and PCD) and initializes the device. The driver components are
+ * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
+ * in the device private data. This allows the driver to access the dwc2_hsotg
+ * structure on subsequent calls to driver methods for this device.
+ */
+static int dwc2_driver_probe(struct platform_device *dev)
+{
+        const struct of_device_id *match;
+        const struct dwc2_core_params *params;
+        struct dwc2_core_params defparams;
+        struct dwc2_hsotg *hsotg;
+        struct resource *res;
+        int retval;
+        int irq;
+
+        if (usb_disabled())
+                return -ENODEV;
+
+        match = of_match_device(dwc2_of_match_table, &dev->dev);
+        if (match && match->data) {
+                params = match->data;
+        } else {
+                /* Default all params to autodetect */
+                dwc2_set_all_params(&defparams, -1);
+                params = &defparams;
+        }
+
+        hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
+        if (!hsotg)
+                return -ENOMEM;
+
+        hsotg->dev = &dev->dev;
+
+        /*
+         * Use reasonable defaults so platforms don't have to provide these.
+         */
+        if (!dev->dev.dma_mask)
+                dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
+        retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
+        if (retval)
+                return retval;
+
+        irq = platform_get_irq(dev, 0);
+        if (irq < 0) {
+                dev_err(&dev->dev, "missing IRQ resource\n");
+                return irq;
+        }
+
+        res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+        hsotg->regs = devm_ioremap_resource(&dev->dev, res);
+        if (IS_ERR(hsotg->regs))
+                return PTR_ERR(hsotg->regs);
+
+        dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
+                (unsigned long)res->start, hsotg->regs);
+
+        retval = dwc2_hcd_init(hsotg, irq, params);
+        if (retval)
+                return retval;
+
+        platform_set_drvdata(dev, hsotg);
+
+        return retval;
+}
+
+static struct platform_driver dwc2_platform_driver = {
+        .driver = {
+                .name = dwc2_driver_name,
+                .of_match_table = dwc2_of_match_table,
+        },
+        .probe = dwc2_driver_probe,
+        .remove = dwc2_driver_remove,
+};
+
+module_platform_driver(dwc2_platform_driver);
+
+MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
+MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
+MODULE_LICENSE("Dual BSD/GPL");