/* * platform.c - DesignWare HS OTG Controller platform driver * * Copyright (C) Matthijs Kooijman * * 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 #include #include #include #include #include #include #include #include #include "core.h" #include "hcd.h" #include "debug.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, .external_id_pin_ctl = -1, .hibernation = -1, }; 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, .external_id_pin_ctl = -1, .hibernation = -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_debugfs_exit(hsotg); if (hsotg->hcd_enabled) dwc2_hcd_remove(hsotg); if (hsotg->gadget_enabled) dwc2_hsotg_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 }, { .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 = usb_get_dr_mode(&dev->dev); if (IS_ENABLED(CONFIG_USB_DWC2_HOST) && hsotg->dr_mode != USB_DR_MODE_HOST) { hsotg->dr_mode = USB_DR_MODE_HOST; dev_warn(hsotg->dev, "Configuration mismatch. Forcing host mode\n"); } else if (IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) && hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) { hsotg->dr_mode = USB_DR_MODE_PERIPHERAL; dev_warn(hsotg->dev, "Configuration mismatch. Forcing peripheral mode\n"); } /* * 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); /* Detect config values from hardware */ retval = dwc2_get_hwparams(hsotg); if (retval) return retval; hsotg->core_params = devm_kzalloc(&dev->dev, sizeof(*hsotg->core_params), GFP_KERNEL); if (!hsotg->core_params) return -ENOMEM; dwc2_set_all_params(hsotg->core_params, -1); /* Validate parameter values */ dwc2_set_parameters(hsotg, params); 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); if (retval) { if (hsotg->gadget_enabled) dwc2_hsotg_remove(hsotg); return retval; } hsotg->hcd_enabled = 1; } platform_set_drvdata(dev, hsotg); dwc2_debugfs_init(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 = dwc2_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 = dwc2_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 "); MODULE_LICENSE("Dual BSD/GPL");