From 99882e3f881814284450575bb412acf257f73196 Mon Sep 17 00:00:00 2001 From: Paul Zimmerman Date: Mon, 11 Mar 2013 17:48:01 -0700 Subject: [PATCH] staging: PCI bus interface for the DWC2 driver This file contains the PCI bus interface "glue" for the DWC2 driver Signed-off-by: Paul Zimmerman Reviewed-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/staging/dwc2/pci.c | 198 +++++++++++++++++++++++++++++++++++++ 1 file changed, 198 insertions(+) create mode 100644 drivers/staging/dwc2/pci.c diff --git a/drivers/staging/dwc2/pci.c b/drivers/staging/dwc2/pci.c new file mode 100644 index 00000000000..117d3ce404d --- /dev/null +++ b/drivers/staging/dwc2/pci.c @@ -0,0 +1,198 @@ +/* + * pci.c - DesignWare HS OTG Controller PCI driver + * + * Copyright (C) 2004-2013 Synopsys, Inc. + * + * 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. + */ + +/* + * Provides the initialization and cleanup entry points for the DWC_otg PCI + * driver + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "core.h" +#include "hcd.h" + +#define PCI_VENDOR_ID_SYNOPSYS 0x16c3 +#define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0 + +static const char dwc2_driver_name[] = "dwc_otg"; + +static struct dwc2_core_params dwc2_module_params = { + .otg_cap = -1, + .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 = 1024, + .host_nperio_tx_fifo_size = 256, + .host_perio_tx_fifo_size = 1024, + .max_transfer_size = 65535, + .max_packet_count = 511, + .host_channels = -1, + .phy_type = -1, + .phy_utmi_width = 16, /* 16 bits - NOT DETECTABLE */ + .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, + .ahb_single = -1, +}; + +/** + * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the + * DWC_otg driver + * + * @dev: Bus 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 void dwc2_driver_remove(struct pci_dev *dev) +{ + struct dwc2_hsotg *hsotg = pci_get_drvdata(dev); + + dev_dbg(&dev->dev, "%s(%p)\n", __func__, dev); + + dwc2_hcd_remove(&dev->dev, hsotg); + pci_disable_device(dev); +} + +/** + * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg + * driver + * + * @dev: Bus 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 pci_dev *dev, + const struct pci_device_id *id) +{ + struct dwc2_hsotg *hsotg; + int retval; + + dev_dbg(&dev->dev, "%s(%p)\n", __func__, dev); + + hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL); + if (!hsotg) + return -ENOMEM; + + pci_set_power_state(dev, PCI_D0); + + hsotg->regs = devm_request_and_ioremap(&dev->dev, &dev->resource[0]); + if (!hsotg->regs) + return -ENOMEM; + + dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n", + (unsigned long)pci_resource_start(dev, 0), hsotg->regs); + + if (pci_enable_device(dev) < 0) + return -ENODEV; + + pci_set_master(dev); + + if (dwc2_module_params.dma_enable > 0) { + if (pci_set_dma_mask(dev, DMA_BIT_MASK(31)) < 0) + dev_warn(&dev->dev, + "can't enable workaround for >2GB RAM\n"); + if (pci_set_consistent_dma_mask(dev, DMA_BIT_MASK(31)) < 0) + dev_warn(&dev->dev, + "can't enable workaround for >2GB RAM\n"); + } else { + pci_set_dma_mask(dev, 0); + pci_set_consistent_dma_mask(dev, 0); + } + + retval = dwc2_hcd_init(&dev->dev, hsotg, dev->irq, &dwc2_module_params); + if (retval) { + pci_disable_device(dev); + return retval; + } + + pci_set_drvdata(dev, hsotg); + dev_dbg(&dev->dev, "hsotg=%p\n", hsotg); + + dev_dbg(&dev->dev, "registering common handler for irq%d\n", dev->irq); + retval = devm_request_irq(&dev->dev, dev->irq, dwc2_handle_common_intr, + IRQF_SHARED | IRQ_LEVEL, dev_name(&dev->dev), + hsotg); + if (retval) + dwc2_hcd_remove(&dev->dev, hsotg); + + return retval; +} + +static DEFINE_PCI_DEVICE_TABLE(dwc2_pci_ids) = { + { + PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG), + }, + { /* end: all zeroes */ } +}; +MODULE_DEVICE_TABLE(pci, dwc2_pci_ids); + +static struct pci_driver dwc2_pci_driver = { + .name = dwc2_driver_name, + .id_table = dwc2_pci_ids, + .probe = dwc2_driver_probe, + .remove = dwc2_driver_remove, +}; + +module_pci_driver(dwc2_pci_driver); + +MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue"); +MODULE_AUTHOR("Synopsys, Inc."); +MODULE_LICENSE("Dual BSD/GPL"); -- 2.41.0