230 lines
6.9 KiB
C
230 lines
6.9 KiB
C
/*
|
|
* 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 <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);
|
|
|
|
dwc2_hcd_remove(hsotg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id dwc2_of_match_table[] = {
|
|
{ .compatible = "brcm,bcm2835-usb", .data = ¶ms_bcm2835 },
|
|
{ .compatible = "rockchip,rk3066-usb", .data = ¶ms_rk3066 },
|
|
{ .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;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
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);
|
|
|
|
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");
|