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![Marek Szyprowski](/assets/img/avatar_default.png)
If device is configured to work only in HOST or DEVICE mode, there is no point in initializing both subdrivers. This patch also fixes resource leakage if host subdriver fails to initialize. Acked-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
312 lines
8.8 KiB
C
312 lines
8.8 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/mutex.h>
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#include <linux/platform_device.h>
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#include <linux/usb/of.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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static const struct dwc2_core_params params_rk3066 = {
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.otg_cap = 2, /* non-HNP/non-SRP */
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.otg_ver = -1,
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.dma_enable = -1,
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.dma_desc_enable = 0,
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.speed = -1,
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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 = 520, /* 520 DWORDs */
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.host_nperio_tx_fifo_size = 128, /* 128 DWORDs */
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.host_perio_tx_fifo_size = 256, /* 256 DWORDs */
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.max_transfer_size = 65535,
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.max_packet_count = -1,
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.host_channels = -1,
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.phy_type = -1,
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.phy_utmi_width = -1,
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.phy_ulpi_ddr = -1,
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.phy_ulpi_ext_vbus = -1,
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.i2c_enable = -1,
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.ulpi_fs_ls = -1,
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.host_support_fs_ls_low_power = -1,
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.host_ls_low_power_phy_clk = -1,
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.ts_dline = -1,
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.reload_ctl = -1,
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.ahbcfg = 0x7, /* INCR16 */
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.uframe_sched = -1,
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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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if (hsotg->hcd_enabled)
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dwc2_hcd_remove(hsotg);
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if (hsotg->gadget_enabled)
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s3c_hsotg_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 = "rockchip,rk3066-usb", .data = ¶ms_rk3066 },
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{ .compatible = "snps,dwc2", .data = NULL },
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{ .compatible = "samsung,s3c6400-hsotg", .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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struct phy *phy;
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struct usb_phy *uphy;
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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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* Disable descriptor dma mode by default as the HW can support
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* it, but does not support it for SPLIT transactions.
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*/
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defparams.dma_desc_enable = 0;
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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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dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
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irq);
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retval = devm_request_irq(hsotg->dev, irq,
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dwc2_handle_common_intr, IRQF_SHARED,
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dev_name(hsotg->dev), hsotg);
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if (retval)
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return retval;
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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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hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);
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/*
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* Attempt to find a generic PHY, then look for an old style
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* USB PHY
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*/
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phy = devm_phy_get(&dev->dev, "usb2-phy");
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if (IS_ERR(phy)) {
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hsotg->phy = NULL;
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uphy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
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if (IS_ERR(uphy))
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hsotg->uphy = NULL;
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else
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hsotg->uphy = uphy;
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} else {
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hsotg->phy = phy;
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phy_power_on(hsotg->phy);
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phy_init(hsotg->phy);
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}
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spin_lock_init(&hsotg->lock);
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mutex_init(&hsotg->init_mutex);
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if (hsotg->dr_mode != USB_DR_MODE_HOST) {
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retval = dwc2_gadget_init(hsotg, irq);
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if (retval)
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return retval;
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hsotg->gadget_enabled = 1;
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}
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if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
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retval = dwc2_hcd_init(hsotg, irq, params);
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if (retval) {
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if (hsotg->gadget_enabled)
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s3c_hsotg_remove(hsotg);
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return retval;
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}
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hsotg->hcd_enabled = 1;
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}
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platform_set_drvdata(dev, hsotg);
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return retval;
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}
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static int __maybe_unused dwc2_suspend(struct device *dev)
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{
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struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
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int ret = 0;
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if (dwc2_is_device_mode(dwc2)) {
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ret = s3c_hsotg_suspend(dwc2);
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} else {
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if (dwc2->lx_state == DWC2_L0)
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return 0;
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phy_exit(dwc2->phy);
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phy_power_off(dwc2->phy);
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}
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return ret;
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}
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static int __maybe_unused dwc2_resume(struct device *dev)
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{
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struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
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int ret = 0;
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if (dwc2_is_device_mode(dwc2)) {
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ret = s3c_hsotg_resume(dwc2);
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} else {
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phy_power_on(dwc2->phy);
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phy_init(dwc2->phy);
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}
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return ret;
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}
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static const struct dev_pm_ops dwc2_dev_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(dwc2_suspend, dwc2_resume)
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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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.pm = &dwc2_dev_pm_ops,
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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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