/* * 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 #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_hi6220 = { .otg_cap = 2, /* No HNP/SRP capable */ .otg_ver = 0, /* 1.3 */ .dma_enable = 1, .dma_desc_enable = 0, .dma_desc_fs_enable = 0, .speed = 0, /* High Speed */ .enable_dynamic_fifo = 1, .en_multiple_tx_fifo = 1, .host_rx_fifo_size = 512, .host_nperio_tx_fifo_size = 512, .host_perio_tx_fifo_size = 512, .max_transfer_size = 65535, .max_packet_count = 511, .host_channels = 16, .phy_type = 1, /* UTMI */ .phy_utmi_width = 8, .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 = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT, .uframe_sched = 0, .external_id_pin_ctl = -1, .hibernation = -1, }; 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, .dma_desc_fs_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, .dma_desc_fs_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 = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT, .uframe_sched = -1, .external_id_pin_ctl = -1, .hibernation = -1, }; /* * Check the dr_mode against the module configuration and hardware * capabilities. * * The hardware, module, and dr_mode, can each be set to host, device, * or otg. Check that all these values are compatible and adjust the * value of dr_mode if possible. * * actual * HW MOD dr_mode dr_mode * ------------------------------ * HST HST any : HST * HST DEV any : --- * HST OTG any : HST * * DEV HST any : --- * DEV DEV any : DEV * DEV OTG any : DEV * * OTG HST any : HST * OTG DEV any : DEV * OTG OTG any : dr_mode */ static int dwc2_get_dr_mode(struct dwc2_hsotg *hsotg) { enum usb_dr_mode mode; hsotg->dr_mode = usb_get_dr_mode(hsotg->dev); if (hsotg->dr_mode == USB_DR_MODE_UNKNOWN) hsotg->dr_mode = USB_DR_MODE_OTG; mode = hsotg->dr_mode; if (dwc2_hw_is_device(hsotg)) { if (IS_ENABLED(CONFIG_USB_DWC2_HOST)) { dev_err(hsotg->dev, "Controller does not support host mode.\n"); return -EINVAL; } mode = USB_DR_MODE_PERIPHERAL; } else if (dwc2_hw_is_host(hsotg)) { if (IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL)) { dev_err(hsotg->dev, "Controller does not support device mode.\n"); return -EINVAL; } mode = USB_DR_MODE_HOST; } else { if (IS_ENABLED(CONFIG_USB_DWC2_HOST)) mode = USB_DR_MODE_HOST; else if (IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL)) mode = USB_DR_MODE_PERIPHERAL; } if (mode != hsotg->dr_mode) { dev_warn(hsotg->dev, "Configuration mismatch. dr_mode forced to %s\n", mode == USB_DR_MODE_HOST ? "host" : "device"); hsotg->dr_mode = mode; } return 0; } static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg) { struct platform_device *pdev = to_platform_device(hsotg->dev); int ret; ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies); if (ret) return ret; if (hsotg->clk) { ret = clk_prepare_enable(hsotg->clk); if (ret) return ret; } if (hsotg->uphy) ret = usb_phy_init(hsotg->uphy); else if (hsotg->plat && hsotg->plat->phy_init) ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type); else { ret = phy_power_on(hsotg->phy); if (ret == 0) ret = phy_init(hsotg->phy); } return ret; } /** * dwc2_lowlevel_hw_enable - enable platform lowlevel hw resources * @hsotg: The driver state * * A wrapper for platform code responsible for controlling * low-level USB platform resources (phy, clock, regulators) */ int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg) { int ret = __dwc2_lowlevel_hw_enable(hsotg); if (ret == 0) hsotg->ll_hw_enabled = true; return ret; } static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg) { struct platform_device *pdev = to_platform_device(hsotg->dev); int ret = 0; if (hsotg->uphy) usb_phy_shutdown(hsotg->uphy); else if (hsotg->plat && hsotg->plat->phy_exit) ret = hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type); else { ret = phy_exit(hsotg->phy); if (ret == 0) ret = phy_power_off(hsotg->phy); } if (ret) return ret; if (hsotg->clk) clk_disable_unprepare(hsotg->clk); ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies); return ret; } /** * dwc2_lowlevel_hw_disable - disable platform lowlevel hw resources * @hsotg: The driver state * * A wrapper for platform code responsible for controlling * low-level USB platform resources (phy, clock, regulators) */ int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg) { int ret = __dwc2_lowlevel_hw_disable(hsotg); if (ret == 0) hsotg->ll_hw_enabled = false; return ret; } static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg) { int i, ret; /* Set default UTMI width */ hsotg->phyif = GUSBCFG_PHYIF16; /* * Attempt to find a generic PHY, then look for an old style * USB PHY and then fall back to pdata */ hsotg->phy = devm_phy_get(hsotg->dev, "usb2-phy"); if (IS_ERR(hsotg->phy)) { ret = PTR_ERR(hsotg->phy); switch (ret) { case -ENODEV: case -ENOSYS: hsotg->phy = NULL; break; case -EPROBE_DEFER: return ret; default: dev_err(hsotg->dev, "error getting phy %d\n", ret); return ret; } } if (!hsotg->phy) { hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2); if (IS_ERR(hsotg->uphy)) { ret = PTR_ERR(hsotg->uphy); switch (ret) { case -ENODEV: case -ENXIO: hsotg->uphy = NULL; break; case -EPROBE_DEFER: return ret; default: dev_err(hsotg->dev, "error getting usb phy %d\n", ret); return ret; } } } hsotg->plat = dev_get_platdata(hsotg->dev); if (hsotg->phy) { /* * If using the generic PHY framework, check if the PHY bus * width is 8-bit and set the phyif appropriately. */ if (phy_get_bus_width(hsotg->phy) == 8) hsotg->phyif = GUSBCFG_PHYIF8; } /* Clock */ hsotg->clk = devm_clk_get(hsotg->dev, "otg"); if (IS_ERR(hsotg->clk)) { hsotg->clk = NULL; dev_dbg(hsotg->dev, "cannot get otg clock\n"); } /* Regulators */ for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++) hsotg->supplies[i].supply = dwc2_hsotg_supply_names[i]; ret = devm_regulator_bulk_get(hsotg->dev, ARRAY_SIZE(hsotg->supplies), hsotg->supplies); if (ret) { dev_err(hsotg->dev, "failed to request supplies: %d\n", ret); return ret; } return 0; } /** * 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); if (hsotg->ll_hw_enabled) dwc2_lowlevel_hw_disable(hsotg); return 0; } static const struct of_device_id dwc2_of_match_table[] = { { .compatible = "brcm,bcm2835-usb", .data = ¶ms_bcm2835 }, { .compatible = "hisilicon,hi6220-usb", .data = ¶ms_hi6220 }, { .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; 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. * Disable it for FS devices as well. */ defparams.dma_desc_enable = 0; defparams.dma_desc_fs_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; 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); retval = dwc2_lowlevel_hw_init(hsotg); if (retval) return retval; spin_lock_init(&hsotg->lock); 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); 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; retval = dwc2_lowlevel_hw_enable(hsotg); if (retval) return retval; retval = dwc2_get_dr_mode(hsotg); if (retval) return retval; /* * Reset before dwc2_get_hwparams() then it could get power-on real * reset value form registers. */ dwc2_core_reset_and_force_dr_mode(hsotg); /* Detect config values from hardware */ retval = dwc2_get_hwparams(hsotg); if (retval) goto error; /* Validate parameter values */ dwc2_set_parameters(hsotg, params); if (hsotg->dr_mode != USB_DR_MODE_HOST) { retval = dwc2_gadget_init(hsotg, irq); if (retval) goto error; 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); goto error; } hsotg->hcd_enabled = 1; } platform_set_drvdata(dev, hsotg); dwc2_debugfs_init(hsotg); /* Gadget code manages lowlevel hw on its own */ if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) dwc2_lowlevel_hw_disable(hsotg); return 0; error: dwc2_lowlevel_hw_disable(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)) dwc2_hsotg_suspend(dwc2); if (dwc2->ll_hw_enabled) ret = __dwc2_lowlevel_hw_disable(dwc2); return ret; } static int __maybe_unused dwc2_resume(struct device *dev) { struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev); int ret = 0; if (dwc2->ll_hw_enabled) { ret = __dwc2_lowlevel_hw_enable(dwc2); if (ret) return ret; } if (dwc2_is_device_mode(dwc2)) ret = dwc2_hsotg_resume(dwc2); 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");