/* * Driver for the NXP ISP1760 chip * * Copyright 2014 Laurent Pinchart * Copyright 2007 Sebastian Siewior * * Contacts: * Sebastian Siewior * Laurent Pinchart * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include "isp1760-core.h" #include "isp1760-hcd.h" #include "isp1760-regs.h" #include "isp1760-udc.h" static void isp1760_init_core(struct isp1760_device *isp) { u32 otgctrl; u32 hwmode; /* Low-level chip reset */ if (isp->rst_gpio) { gpiod_set_value_cansleep(isp->rst_gpio, 1); mdelay(50); gpiod_set_value_cansleep(isp->rst_gpio, 0); } /* * Reset the host controller, including the CPU interface * configuration. */ isp1760_write32(isp->regs, HC_RESET_REG, SW_RESET_RESET_ALL); msleep(100); /* Setup HW Mode Control: This assumes a level active-low interrupt */ hwmode = HW_DATA_BUS_32BIT; if (isp->devflags & ISP1760_FLAG_BUS_WIDTH_16) hwmode &= ~HW_DATA_BUS_32BIT; if (isp->devflags & ISP1760_FLAG_ANALOG_OC) hwmode |= HW_ANA_DIGI_OC; if (isp->devflags & ISP1760_FLAG_DACK_POL_HIGH) hwmode |= HW_DACK_POL_HIGH; if (isp->devflags & ISP1760_FLAG_DREQ_POL_HIGH) hwmode |= HW_DREQ_POL_HIGH; if (isp->devflags & ISP1760_FLAG_INTR_POL_HIGH) hwmode |= HW_INTR_HIGH_ACT; if (isp->devflags & ISP1760_FLAG_INTR_EDGE_TRIG) hwmode |= HW_INTR_EDGE_TRIG; /* * The ISP1761 has a dedicated DC IRQ line but supports sharing the HC * IRQ line for both the host and device controllers. Hardcode IRQ * sharing for now and disable the DC interrupts globally to avoid * spurious interrupts during HCD registration. */ if (isp->devflags & ISP1760_FLAG_ISP1761) { isp1760_write32(isp->regs, DC_MODE, 0); hwmode |= HW_COMN_IRQ; } /* * We have to set this first in case we're in 16-bit mode. * Write it twice to ensure correct upper bits if switching * to 16-bit mode. */ isp1760_write32(isp->regs, HC_HW_MODE_CTRL, hwmode); isp1760_write32(isp->regs, HC_HW_MODE_CTRL, hwmode); /* * PORT 1 Control register of the ISP1760 is the OTG control register * on ISP1761. * * TODO: Really support OTG. For now we configure port 1 in device mode * when OTG is requested. */ if ((isp->devflags & ISP1760_FLAG_ISP1761) && (isp->devflags & ISP1760_FLAG_OTG_EN)) otgctrl = ((HW_DM_PULLDOWN | HW_DP_PULLDOWN) << 16) | HW_OTG_DISABLE; else otgctrl = (HW_SW_SEL_HC_DC << 16) | (HW_VBUS_DRV | HW_SEL_CP_EXT); isp1760_write32(isp->regs, HC_PORT1_CTRL, otgctrl); dev_info(isp->dev, "bus width: %u, oc: %s\n", isp->devflags & ISP1760_FLAG_BUS_WIDTH_16 ? 16 : 32, isp->devflags & ISP1760_FLAG_ANALOG_OC ? "analog" : "digital"); } void isp1760_set_pullup(struct isp1760_device *isp, bool enable) { isp1760_write32(isp->regs, HW_OTG_CTRL_SET, enable ? HW_DP_PULLUP : HW_DP_PULLUP << 16); } int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, struct device *dev, unsigned int devflags) { struct isp1760_device *isp; bool udc_disabled = !(devflags & ISP1760_FLAG_ISP1761); int ret; /* * If neither the HCD not the UDC is enabled return an error, as no * device would be registered. */ if ((!IS_ENABLED(CONFIG_USB_ISP1760_HCD) || usb_disabled()) && (!IS_ENABLED(CONFIG_USB_ISP1761_UDC) || udc_disabled)) return -ENODEV; /* prevent usb-core allocating DMA pages */ dev->dma_mask = NULL; isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL); if (!isp) return -ENOMEM; isp->dev = dev; isp->devflags = devflags; isp->rst_gpio = devm_gpiod_get_optional(dev, NULL, GPIOD_OUT_HIGH); if (IS_ERR(isp->rst_gpio)) return PTR_ERR(isp->rst_gpio); isp->regs = devm_ioremap_resource(dev, mem); if (IS_ERR(isp->regs)) return PTR_ERR(isp->regs); isp1760_init_core(isp); if (IS_ENABLED(CONFIG_USB_ISP1760_HCD) && !usb_disabled()) { ret = isp1760_hcd_register(&isp->hcd, isp->regs, mem, irq, irqflags | IRQF_SHARED, dev); if (ret < 0) return ret; } if (IS_ENABLED(CONFIG_USB_ISP1761_UDC) && !udc_disabled) { ret = isp1760_udc_register(isp, irq, irqflags); if (ret < 0) { isp1760_hcd_unregister(&isp->hcd); return ret; } } dev_set_drvdata(dev, isp); return 0; } void isp1760_unregister(struct device *dev) { struct isp1760_device *isp = dev_get_drvdata(dev); isp1760_udc_unregister(isp); isp1760_hcd_unregister(&isp->hcd); } MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP"); MODULE_AUTHOR("Sebastian Siewior "); MODULE_LICENSE("GPL v2"); ivate-remove&id=770f82253dbd7e6892a88018f2f6cd395f48d214'>amp.c2772logplain -rw-r--r--amp.h1594logplain -rw-r--r--aureon.c62319logplain -rw-r--r--aureon.h2419logplain -rw-r--r--delta.c26497logplain