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path: root/drivers/usb/dwc2/platform.c
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Diffstat (limited to 'drivers/usb/dwc2/platform.c')
-rw-r--r--drivers/usb/dwc2/platform.c312
1 files changed, 312 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
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+++ b/drivers/usb/dwc2/platform.c
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+/*
+ * 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/mutex.h>
+#include <linux/platform_device.h>
+
+#include <linux/usb/of.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,
+};
+
+static const struct dwc2_core_params params_rk3066 = {
+ .otg_cap = 2, /* non-HNP/non-SRP */
+ .otg_ver = -1,
+ .dma_enable = -1,
+ .dma_desc_enable = 0,
+ .speed = -1,
+ .enable_dynamic_fifo = 1,
+ .en_multiple_tx_fifo = -1,
+ .host_rx_fifo_size = 520, /* 520 DWORDs */
+ .host_nperio_tx_fifo_size = 128, /* 128 DWORDs */
+ .host_perio_tx_fifo_size = 256, /* 256 DWORDs */
+ .max_transfer_size = 65535,
+ .max_packet_count = -1,
+ .host_channels = -1,
+ .phy_type = -1,
+ .phy_utmi_width = -1,
+ .phy_ulpi_ddr = -1,
+ .phy_ulpi_ext_vbus = -1,
+ .i2c_enable = -1,
+ .ulpi_fs_ls = -1,
+ .host_support_fs_ls_low_power = -1,
+ .host_ls_low_power_phy_clk = -1,
+ .ts_dline = -1,
+ .reload_ctl = -1,
+ .ahbcfg = 0x7, /* INCR16 */
+ .uframe_sched = -1,
+};
+
+/**
+ * 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);
+
+ if (hsotg->hcd_enabled)
+ dwc2_hcd_remove(hsotg);
+ if (hsotg->gadget_enabled)
+ s3c_hsotg_remove(hsotg);
+
+ return 0;
+}
+
+static const struct of_device_id dwc2_of_match_table[] = {
+ { .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },
+ { .compatible = "rockchip,rk3066-usb", .data = &params_rk3066 },
+ { .compatible = "snps,dwc2", .data = NULL },
+ { .compatible = "samsung,s3c6400-hsotg", .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;
+ struct phy *phy;
+ struct usb_phy *uphy;
+ int retval;
+ int irq;
+
+ 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;
+
+ /*
+ * Disable descriptor dma mode by default as the HW can support
+ * it, but does not support it for SPLIT transactions.
+ */
+ defparams.dma_desc_enable = 0;
+ }
+
+ 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;
+ }
+
+ dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
+ irq);
+ retval = devm_request_irq(hsotg->dev, irq,
+ dwc2_handle_common_intr, IRQF_SHARED,
+ dev_name(hsotg->dev), hsotg);
+ if (retval)
+ return retval;
+
+ 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);
+
+ hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);
+
+ /*
+ * Attempt to find a generic PHY, then look for an old style
+ * USB PHY
+ */
+ phy = devm_phy_get(&dev->dev, "usb2-phy");
+ if (IS_ERR(phy)) {
+ hsotg->phy = NULL;
+ uphy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR(uphy))
+ hsotg->uphy = NULL;
+ else
+ hsotg->uphy = uphy;
+ } else {
+ hsotg->phy = phy;
+ phy_power_on(hsotg->phy);
+ phy_init(hsotg->phy);
+ }
+
+ spin_lock_init(&hsotg->lock);
+ mutex_init(&hsotg->init_mutex);
+
+ if (hsotg->dr_mode != USB_DR_MODE_HOST) {
+ retval = dwc2_gadget_init(hsotg, irq);
+ if (retval)
+ return retval;
+ hsotg->gadget_enabled = 1;
+ }
+
+ if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
+ retval = dwc2_hcd_init(hsotg, irq, params);
+ if (retval) {
+ if (hsotg->gadget_enabled)
+ s3c_hsotg_remove(hsotg);
+ return retval;
+ }
+ hsotg->hcd_enabled = 1;
+ }
+
+ platform_set_drvdata(dev, hsotg);
+
+ return retval;
+}
+
+static int __maybe_unused dwc2_suspend(struct device *dev)
+{
+ struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (dwc2_is_device_mode(dwc2)) {
+ ret = s3c_hsotg_suspend(dwc2);
+ } else {
+ if (dwc2->lx_state == DWC2_L0)
+ return 0;
+ phy_exit(dwc2->phy);
+ phy_power_off(dwc2->phy);
+
+ }
+ return ret;
+}
+
+static int __maybe_unused dwc2_resume(struct device *dev)
+{
+ struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (dwc2_is_device_mode(dwc2)) {
+ ret = s3c_hsotg_resume(dwc2);
+ } else {
+ phy_power_on(dwc2->phy);
+ phy_init(dwc2->phy);
+
+ }
+ return ret;
+}
+
+static const struct dev_pm_ops dwc2_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(dwc2_suspend, dwc2_resume)
+};
+
+static struct platform_driver dwc2_platform_driver = {
+ .driver = {
+ .name = dwc2_driver_name,
+ .of_match_table = dwc2_of_match_table,
+ .pm = &dwc2_dev_pm_ops,
+ },
+ .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");