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170 lines
4.3 KiB
170 lines
4.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* ci_hdrc_pci.c - MIPS USB IP core family device controller |
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* |
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* Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. |
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* |
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* Author: David Lopo |
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*/ |
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#include <linux/platform_device.h> |
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#include <linux/module.h> |
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#include <linux/pci.h> |
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#include <linux/interrupt.h> |
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#include <linux/usb/gadget.h> |
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#include <linux/usb/chipidea.h> |
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#include <linux/usb/usb_phy_generic.h> |
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/* driver name */ |
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#define UDC_DRIVER_NAME "ci_hdrc_pci" |
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struct ci_hdrc_pci { |
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struct platform_device *ci; |
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struct platform_device *phy; |
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}; |
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/****************************************************************************** |
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* PCI block |
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*****************************************************************************/ |
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static struct ci_hdrc_platform_data pci_platdata = { |
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.name = UDC_DRIVER_NAME, |
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.capoffset = DEF_CAPOFFSET, |
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}; |
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static struct ci_hdrc_platform_data langwell_pci_platdata = { |
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.name = UDC_DRIVER_NAME, |
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.capoffset = 0, |
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}; |
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static struct ci_hdrc_platform_data penwell_pci_platdata = { |
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.name = UDC_DRIVER_NAME, |
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.capoffset = 0, |
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.power_budget = 200, |
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}; |
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/** |
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* ci_hdrc_pci_probe: PCI probe |
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* @pdev: USB device controller being probed |
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* @id: PCI hotplug ID connecting controller to UDC framework |
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* |
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* This function returns an error code |
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* Allocates basic PCI resources for this USB device controller, and then |
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* invokes the udc_probe() method to start the UDC associated with it |
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*/ |
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static int ci_hdrc_pci_probe(struct pci_dev *pdev, |
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const struct pci_device_id *id) |
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{ |
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struct ci_hdrc_platform_data *platdata = (void *)id->driver_data; |
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struct ci_hdrc_pci *ci; |
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struct resource res[3]; |
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int retval = 0, nres = 2; |
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if (!platdata) { |
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dev_err(&pdev->dev, "device doesn't provide driver data\n"); |
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return -ENODEV; |
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} |
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ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL); |
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if (!ci) |
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return -ENOMEM; |
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retval = pcim_enable_device(pdev); |
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if (retval) |
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return retval; |
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if (!pdev->irq) { |
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dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!"); |
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return -ENODEV; |
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} |
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pci_set_master(pdev); |
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pci_try_set_mwi(pdev); |
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/* register a nop PHY */ |
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ci->phy = usb_phy_generic_register(); |
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if (IS_ERR(ci->phy)) |
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return PTR_ERR(ci->phy); |
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memset(res, 0, sizeof(res)); |
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res[0].start = pci_resource_start(pdev, 0); |
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res[0].end = pci_resource_end(pdev, 0); |
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res[0].flags = IORESOURCE_MEM; |
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res[1].start = pdev->irq; |
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res[1].flags = IORESOURCE_IRQ; |
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ci->ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata); |
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if (IS_ERR(ci->ci)) { |
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dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n"); |
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usb_phy_generic_unregister(ci->phy); |
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return PTR_ERR(ci->ci); |
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} |
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pci_set_drvdata(pdev, ci); |
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return 0; |
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} |
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/** |
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* ci_hdrc_pci_remove: PCI remove |
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* @pdev: USB Device Controller being removed |
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* |
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* Reverses the effect of ci_hdrc_pci_probe(), |
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* first invoking the udc_remove() and then releases |
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* all PCI resources allocated for this USB device controller |
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*/ |
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static void ci_hdrc_pci_remove(struct pci_dev *pdev) |
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{ |
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struct ci_hdrc_pci *ci = pci_get_drvdata(pdev); |
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ci_hdrc_remove_device(ci->ci); |
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usb_phy_generic_unregister(ci->phy); |
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} |
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/* |
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* PCI device table |
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* PCI device structure |
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* |
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* Check "pci.h" for details |
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* |
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* Note: ehci-pci driver may try to probe the device first. You have to add an |
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* ID to the bypass_pci_id_table in ehci-pci driver to prevent this. |
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*/ |
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static const struct pci_device_id ci_hdrc_pci_id_table[] = { |
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{ |
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PCI_DEVICE(0x153F, 0x1004), |
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.driver_data = (kernel_ulong_t)&pci_platdata, |
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}, |
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{ |
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PCI_DEVICE(0x153F, 0x1006), |
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.driver_data = (kernel_ulong_t)&pci_platdata, |
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}, |
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{ |
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PCI_VDEVICE(INTEL, 0x0811), |
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.driver_data = (kernel_ulong_t)&langwell_pci_platdata, |
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}, |
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{ |
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PCI_VDEVICE(INTEL, 0x0829), |
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.driver_data = (kernel_ulong_t)&penwell_pci_platdata, |
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}, |
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{ |
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/* Intel Clovertrail */ |
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PCI_VDEVICE(INTEL, 0xe006), |
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.driver_data = (kernel_ulong_t)&penwell_pci_platdata, |
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}, |
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{ 0 } /* end: all zeroes */ |
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}; |
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MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table); |
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static struct pci_driver ci_hdrc_pci_driver = { |
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.name = UDC_DRIVER_NAME, |
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.id_table = ci_hdrc_pci_id_table, |
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.probe = ci_hdrc_pci_probe, |
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.remove = ci_hdrc_pci_remove, |
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}; |
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module_pci_driver(ci_hdrc_pci_driver); |
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MODULE_AUTHOR("MIPS - David Lopo <[email protected]>"); |
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MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:ci13xxx_pci");
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