188 lines
5.8 KiB
C
188 lines
5.8 KiB
C
/*
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* platform.c - DesignWare HS OTG Controller platform driver
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*
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* Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the above-listed copyright holders may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any
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* later version.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include "core.h"
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#include "hcd.h"
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static const char dwc2_driver_name[] = "dwc2";
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static const struct dwc2_core_params params_bcm2835 = {
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.otg_cap = 0, /* HNP/SRP capable */
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.otg_ver = 0, /* 1.3 */
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.dma_enable = 1,
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.dma_desc_enable = 0,
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.speed = 0, /* High Speed */
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.enable_dynamic_fifo = 1,
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.en_multiple_tx_fifo = 1,
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.host_rx_fifo_size = 774, /* 774 DWORDs */
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.host_nperio_tx_fifo_size = 256, /* 256 DWORDs */
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.host_perio_tx_fifo_size = 512, /* 512 DWORDs */
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.max_transfer_size = 65535,
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.max_packet_count = 511,
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.host_channels = 8,
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.phy_type = 1, /* UTMI */
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.phy_utmi_width = 8, /* 8 bits */
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.phy_ulpi_ddr = 0, /* Single */
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.phy_ulpi_ext_vbus = 0,
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.i2c_enable = 0,
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.ulpi_fs_ls = 0,
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.host_support_fs_ls_low_power = 0,
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.host_ls_low_power_phy_clk = 0, /* 48 MHz */
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.ts_dline = 0,
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.reload_ctl = 0,
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.ahbcfg = 0x10,
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.uframe_sched = 0,
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};
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/**
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* dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
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* DWC_otg driver
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*
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* @dev: Platform device
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*
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* This routine is called, for example, when the rmmod command is executed. The
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* device may or may not be electrically present. If it is present, the driver
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* stops device processing. Any resources used on behalf of this device are
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* freed.
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*/
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static int dwc2_driver_remove(struct platform_device *dev)
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{
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struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
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dwc2_hcd_remove(hsotg);
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return 0;
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}
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static const struct of_device_id dwc2_of_match_table[] = {
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{ .compatible = "brcm,bcm2835-usb", .data = ¶ms_bcm2835 },
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{ .compatible = "snps,dwc2", .data = NULL },
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{},
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};
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MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
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/**
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* dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
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* driver
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*
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* @dev: Platform device
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*
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* This routine creates the driver components required to control the device
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* (core, HCD, and PCD) and initializes the device. The driver components are
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* stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
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* in the device private data. This allows the driver to access the dwc2_hsotg
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* structure on subsequent calls to driver methods for this device.
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*/
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static int dwc2_driver_probe(struct platform_device *dev)
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{
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const struct of_device_id *match;
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const struct dwc2_core_params *params;
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struct dwc2_core_params defparams;
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struct dwc2_hsotg *hsotg;
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struct resource *res;
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int retval;
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int irq;
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match = of_match_device(dwc2_of_match_table, &dev->dev);
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if (match && match->data) {
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params = match->data;
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} else {
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/* Default all params to autodetect */
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dwc2_set_all_params(&defparams, -1);
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params = &defparams;
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}
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hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
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if (!hsotg)
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return -ENOMEM;
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hsotg->dev = &dev->dev;
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/*
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* Use reasonable defaults so platforms don't have to provide these.
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*/
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if (!dev->dev.dma_mask)
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dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
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retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
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if (retval)
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return retval;
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irq = platform_get_irq(dev, 0);
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if (irq < 0) {
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dev_err(&dev->dev, "missing IRQ resource\n");
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return irq;
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}
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res = platform_get_resource(dev, IORESOURCE_MEM, 0);
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hsotg->regs = devm_ioremap_resource(&dev->dev, res);
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if (IS_ERR(hsotg->regs))
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return PTR_ERR(hsotg->regs);
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dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
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(unsigned long)res->start, hsotg->regs);
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retval = dwc2_hcd_init(hsotg, irq, params);
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if (retval)
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return retval;
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platform_set_drvdata(dev, hsotg);
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return retval;
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}
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static struct platform_driver dwc2_platform_driver = {
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.driver = {
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.name = dwc2_driver_name,
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.of_match_table = dwc2_of_match_table,
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},
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.probe = dwc2_driver_probe,
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.remove = dwc2_driver_remove,
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};
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module_platform_driver(dwc2_platform_driver);
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MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
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MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
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MODULE_LICENSE("Dual BSD/GPL");
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