255 lines
6.2 KiB
C
255 lines
6.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* PS3 EHCI Host Controller driver
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*
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* Copyright (C) 2006 Sony Computer Entertainment Inc.
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* Copyright 2006 Sony Corp.
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*/
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#include <asm/firmware.h>
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#include <asm/ps3.h>
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static void ps3_ehci_setup_insnreg(struct ehci_hcd *ehci)
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{
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/* PS3 HC internal setup register offsets. */
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enum ps3_ehci_hc_insnreg {
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ps3_ehci_hc_insnreg01 = 0x084,
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ps3_ehci_hc_insnreg02 = 0x088,
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ps3_ehci_hc_insnreg03 = 0x08c,
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};
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/* PS3 EHCI HC errata fix 316 - The PS3 EHCI HC will reset its
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* internal INSNREGXX setup regs back to the chip default values
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* on Host Controller Reset (CMD_RESET) or Light Host Controller
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* Reset (CMD_LRESET). The work-around for this is for the HC
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* driver to re-initialise these regs when ever the HC is reset.
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*/
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/* Set burst transfer counts to 256 out, 32 in. */
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writel_be(0x01000020, (void __iomem *)ehci->regs +
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ps3_ehci_hc_insnreg01);
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/* Enable burst transfer counts. */
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writel_be(0x00000001, (void __iomem *)ehci->regs +
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ps3_ehci_hc_insnreg03);
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}
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static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
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{
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int result;
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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ehci->big_endian_mmio = 1;
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ehci->caps = hcd->regs;
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result = ehci_setup(hcd);
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if (result)
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return result;
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ps3_ehci_setup_insnreg(ehci);
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return result;
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}
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static const struct hc_driver ps3_ehci_hc_driver = {
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.description = hcd_name,
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.product_desc = "PS3 EHCI Host Controller",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
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.reset = ps3_ehci_hc_reset,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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.get_frame_number = ehci_get_frame,
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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#if defined(CONFIG_PM)
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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#endif
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int ps3_ehci_probe(struct ps3_system_bus_device *dev)
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{
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int result;
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struct usb_hcd *hcd;
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unsigned int virq;
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static u64 dummy_mask;
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if (usb_disabled()) {
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result = -ENODEV;
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goto fail_start;
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}
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result = ps3_open_hv_device(dev);
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if (result) {
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dev_dbg(&dev->core, "%s:%d: ps3_open_hv_device failed\n",
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__func__, __LINE__);
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goto fail_open;
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}
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result = ps3_dma_region_create(dev->d_region);
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if (result) {
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dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
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"(%d)\n", __func__, __LINE__, result);
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BUG_ON("check region type");
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goto fail_dma_region;
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}
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result = ps3_mmio_region_create(dev->m_region);
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if (result) {
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dev_dbg(&dev->core, "%s:%d: ps3_map_mmio_region failed\n",
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__func__, __LINE__);
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result = -EPERM;
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goto fail_mmio_region;
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}
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dev_dbg(&dev->core, "%s:%d: mmio mapped_addr %lxh\n", __func__,
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__LINE__, dev->m_region->lpar_addr);
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result = ps3_io_irq_setup(PS3_BINDING_CPU_ANY, dev->interrupt_id, &virq);
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if (result) {
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dev_dbg(&dev->core, "%s:%d: ps3_construct_io_irq(%d) failed.\n",
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__func__, __LINE__, virq);
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result = -EPERM;
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goto fail_irq;
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}
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dummy_mask = DMA_BIT_MASK(32);
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dev->core.dma_mask = &dummy_mask;
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dma_set_coherent_mask(&dev->core, dummy_mask);
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hcd = usb_create_hcd(&ps3_ehci_hc_driver, &dev->core, dev_name(&dev->core));
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if (!hcd) {
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dev_dbg(&dev->core, "%s:%d: usb_create_hcd failed\n", __func__,
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__LINE__);
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result = -ENOMEM;
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goto fail_create_hcd;
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}
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hcd->rsrc_start = dev->m_region->lpar_addr;
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hcd->rsrc_len = dev->m_region->len;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name))
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dev_dbg(&dev->core, "%s:%d: request_mem_region failed\n",
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__func__, __LINE__);
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hcd->regs = ioremap(dev->m_region->lpar_addr, dev->m_region->len);
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if (!hcd->regs) {
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dev_dbg(&dev->core, "%s:%d: ioremap failed\n", __func__,
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__LINE__);
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result = -EPERM;
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goto fail_ioremap;
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}
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dev_dbg(&dev->core, "%s:%d: hcd->rsrc_start %lxh\n", __func__, __LINE__,
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(unsigned long)hcd->rsrc_start);
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dev_dbg(&dev->core, "%s:%d: hcd->rsrc_len %lxh\n", __func__, __LINE__,
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(unsigned long)hcd->rsrc_len);
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dev_dbg(&dev->core, "%s:%d: hcd->regs %lxh\n", __func__, __LINE__,
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(unsigned long)hcd->regs);
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dev_dbg(&dev->core, "%s:%d: virq %lu\n", __func__, __LINE__,
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(unsigned long)virq);
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ps3_system_bus_set_drvdata(dev, hcd);
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result = usb_add_hcd(hcd, virq, 0);
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if (result) {
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dev_dbg(&dev->core, "%s:%d: usb_add_hcd failed (%d)\n",
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__func__, __LINE__, result);
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goto fail_add_hcd;
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}
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device_wakeup_enable(hcd->self.controller);
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return result;
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fail_add_hcd:
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iounmap(hcd->regs);
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fail_ioremap:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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fail_create_hcd:
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ps3_io_irq_destroy(virq);
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fail_irq:
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ps3_free_mmio_region(dev->m_region);
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fail_mmio_region:
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ps3_dma_region_free(dev->d_region);
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fail_dma_region:
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ps3_close_hv_device(dev);
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fail_open:
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fail_start:
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return result;
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}
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static void ps3_ehci_remove(struct ps3_system_bus_device *dev)
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{
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unsigned int tmp;
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struct usb_hcd *hcd = ps3_system_bus_get_drvdata(dev);
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BUG_ON(!hcd);
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dev_dbg(&dev->core, "%s:%d: regs %p\n", __func__, __LINE__, hcd->regs);
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dev_dbg(&dev->core, "%s:%d: irq %u\n", __func__, __LINE__, hcd->irq);
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tmp = hcd->irq;
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usb_remove_hcd(hcd);
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ps3_system_bus_set_drvdata(dev, NULL);
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BUG_ON(!hcd->regs);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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ps3_io_irq_destroy(tmp);
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ps3_free_mmio_region(dev->m_region);
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ps3_dma_region_free(dev->d_region);
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ps3_close_hv_device(dev);
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}
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static int __init ps3_ehci_driver_register(struct ps3_system_bus_driver *drv)
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{
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return firmware_has_feature(FW_FEATURE_PS3_LV1)
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? ps3_system_bus_driver_register(drv)
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: 0;
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}
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static void ps3_ehci_driver_unregister(struct ps3_system_bus_driver *drv)
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{
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if (firmware_has_feature(FW_FEATURE_PS3_LV1))
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ps3_system_bus_driver_unregister(drv);
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}
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MODULE_ALIAS(PS3_MODULE_ALIAS_EHCI);
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static struct ps3_system_bus_driver ps3_ehci_driver = {
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.core.name = "ps3-ehci-driver",
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.core.owner = THIS_MODULE,
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.match_id = PS3_MATCH_ID_EHCI,
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.probe = ps3_ehci_probe,
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.remove = ps3_ehci_remove,
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.shutdown = ps3_ehci_remove,
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};
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