diff options
Diffstat (limited to 'drivers/usb/chipidea/ci_hdrc_pci.c')
| -rw-r--r-- | drivers/usb/chipidea/ci_hdrc_pci.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/ci_hdrc_pci.c b/drivers/usb/chipidea/ci_hdrc_pci.c new file mode 100644 index 000000000..d63479e1a --- /dev/null +++ b/drivers/usb/chipidea/ci_hdrc_pci.c @@ -0,0 +1,170 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ci_hdrc_pci.c - MIPS USB IP core family device controller + * + * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. + * + * Author: David Lopo + */ + +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/interrupt.h> +#include <linux/usb/gadget.h> +#include <linux/usb/chipidea.h> +#include <linux/usb/usb_phy_generic.h> + +/* driver name */ +#define UDC_DRIVER_NAME "ci_hdrc_pci" + +struct ci_hdrc_pci { + struct platform_device *ci; + struct platform_device *phy; +}; + +/****************************************************************************** + * PCI block + *****************************************************************************/ +static struct ci_hdrc_platform_data pci_platdata = { + .name = UDC_DRIVER_NAME, + .capoffset = DEF_CAPOFFSET, +}; + +static struct ci_hdrc_platform_data langwell_pci_platdata = { + .name = UDC_DRIVER_NAME, + .capoffset = 0, +}; + +static struct ci_hdrc_platform_data penwell_pci_platdata = { + .name = UDC_DRIVER_NAME, + .capoffset = 0, + .power_budget = 200, +}; + +/** + * ci_hdrc_pci_probe: PCI probe + * @pdev: USB device controller being probed + * @id: PCI hotplug ID connecting controller to UDC framework + * + * This function returns an error code + * Allocates basic PCI resources for this USB device controller, and then + * invokes the udc_probe() method to start the UDC associated with it + */ +static int ci_hdrc_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct ci_hdrc_platform_data *platdata = (void *)id->driver_data; + struct ci_hdrc_pci *ci; + struct resource res[3]; + int retval = 0, nres = 2; + + if (!platdata) { + dev_err(&pdev->dev, "device doesn't provide driver data\n"); + return -ENODEV; + } + + ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL); + if (!ci) + return -ENOMEM; + + retval = pcim_enable_device(pdev); + if (retval) + return retval; + + if (!pdev->irq) { + dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!"); + return -ENODEV; + } + + pci_set_master(pdev); + pci_try_set_mwi(pdev); + + /* register a nop PHY */ + ci->phy = usb_phy_generic_register(); + if (IS_ERR(ci->phy)) + return PTR_ERR(ci->phy); + + memset(res, 0, sizeof(res)); + res[0].start = pci_resource_start(pdev, 0); + res[0].end = pci_resource_end(pdev, 0); + res[0].flags = IORESOURCE_MEM; + res[1].start = pdev->irq; + res[1].flags = IORESOURCE_IRQ; + + ci->ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata); + if (IS_ERR(ci->ci)) { + dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n"); + usb_phy_generic_unregister(ci->phy); + return PTR_ERR(ci->ci); + } + + pci_set_drvdata(pdev, ci); + + return 0; +} + +/** + * ci_hdrc_pci_remove: PCI remove + * @pdev: USB Device Controller being removed + * + * Reverses the effect of ci_hdrc_pci_probe(), + * first invoking the udc_remove() and then releases + * all PCI resources allocated for this USB device controller + */ +static void ci_hdrc_pci_remove(struct pci_dev *pdev) +{ + struct ci_hdrc_pci *ci = pci_get_drvdata(pdev); + + ci_hdrc_remove_device(ci->ci); + usb_phy_generic_unregister(ci->phy); +} + +/* + * PCI device table + * PCI device structure + * + * Check "pci.h" for details + * + * Note: ehci-pci driver may try to probe the device first. You have to add an + * ID to the bypass_pci_id_table in ehci-pci driver to prevent this. + */ +static const struct pci_device_id ci_hdrc_pci_id_table[] = { + { + PCI_DEVICE(0x153F, 0x1004), + .driver_data = (kernel_ulong_t)&pci_platdata, + }, + { + PCI_DEVICE(0x153F, 0x1006), + .driver_data = (kernel_ulong_t)&pci_platdata, + }, + { + PCI_VDEVICE(INTEL, 0x0811), + .driver_data = (kernel_ulong_t)&langwell_pci_platdata, + }, + { + PCI_VDEVICE(INTEL, 0x0829), + .driver_data = (kernel_ulong_t)&penwell_pci_platdata, + }, + { + /* Intel Clovertrail */ + PCI_VDEVICE(INTEL, 0xe006), + .driver_data = (kernel_ulong_t)&penwell_pci_platdata, + }, + { 0 } /* end: all zeroes */ +}; +MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table); + +static struct pci_driver ci_hdrc_pci_driver = { + .name = UDC_DRIVER_NAME, + .id_table = ci_hdrc_pci_id_table, + .probe = ci_hdrc_pci_probe, + .remove = ci_hdrc_pci_remove, +}; + +module_pci_driver(ci_hdrc_pci_driver); + +MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>"); +MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:ci13xxx_pci"); |