usb-init.c
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/*
* Copyright (c) 2003-2012 Broadcom Corporation
* All Rights Reserved
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the Broadcom
* license below:
*
* 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.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY BROADCOM ``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 BROADCOM 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.
*/
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <asm/netlogic/haldefs.h>
#include <asm/netlogic/xlp-hal/iomap.h>
#include <asm/netlogic/xlp-hal/xlp.h>
/*
* USB glue logic registers, used only during initialization
*/
#define USB_CTL_0 0x01
#define USB_PHY_0 0x0A
#define USB_PHY_RESET 0x01
#define USB_PHY_PORT_RESET_0 0x10
#define USB_PHY_PORT_RESET_1 0x20
#define USB_CONTROLLER_RESET 0x01
#define USB_INT_STATUS 0x0E
#define USB_INT_EN 0x0F
#define USB_PHY_INTERRUPT_EN 0x01
#define USB_OHCI_INTERRUPT_EN 0x02
#define USB_OHCI_INTERRUPT1_EN 0x04
#define USB_OHCI_INTERRUPT2_EN 0x08
#define USB_CTRL_INTERRUPT_EN 0x10
#define nlm_read_usb_reg(b, r) nlm_read_reg(b, r)
#define nlm_write_usb_reg(b, r, v) nlm_write_reg(b, r, v)
#define nlm_get_usb_pcibase(node, inst) \
nlm_pcicfg_base(XLP_IO_USB_OFFSET(node, inst))
#define nlm_get_usb_regbase(node, inst) \
(nlm_get_usb_pcibase(node, inst) + XLP_IO_PCI_HDRSZ)
static void nlm_usb_intr_en(int node, int port)
{
uint32_t val;
uint64_t port_addr;
port_addr = nlm_get_usb_regbase(node, port);
val = nlm_read_usb_reg(port_addr, USB_INT_EN);
val = USB_CTRL_INTERRUPT_EN | USB_OHCI_INTERRUPT_EN |
USB_OHCI_INTERRUPT1_EN | USB_OHCI_INTERRUPT2_EN;
nlm_write_usb_reg(port_addr, USB_INT_EN, val);
}
static void nlm_usb_hw_reset(int node, int port)
{
uint64_t port_addr;
uint32_t val;
/* reset USB phy */
port_addr = nlm_get_usb_regbase(node, port);
val = nlm_read_usb_reg(port_addr, USB_PHY_0);
val &= ~(USB_PHY_RESET | USB_PHY_PORT_RESET_0 | USB_PHY_PORT_RESET_1);
nlm_write_usb_reg(port_addr, USB_PHY_0, val);
mdelay(100);
val = nlm_read_usb_reg(port_addr, USB_CTL_0);
val &= ~(USB_CONTROLLER_RESET);
val |= 0x4;
nlm_write_usb_reg(port_addr, USB_CTL_0, val);
}
static int __init nlm_platform_usb_init(void)
{
if (cpu_is_xlpii())
return 0;
pr_info("Initializing USB Interface\n");
nlm_usb_hw_reset(0, 0);
nlm_usb_hw_reset(0, 3);
/* Enable PHY interrupts */
nlm_usb_intr_en(0, 0);
nlm_usb_intr_en(0, 3);
return 0;
}
arch_initcall(nlm_platform_usb_init);
static u64 xlp_usb_dmamask = ~(u32)0;
/* Fixup the IRQ for USB devices which is exist on XLP SOC PCIE bus */
static void nlm_usb_fixup_final(struct pci_dev *dev)
{
dev->dev.dma_mask = &xlp_usb_dmamask;
dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
switch (dev->devfn) {
case 0x10:
dev->irq = PIC_EHCI_0_IRQ;
break;
case 0x11:
dev->irq = PIC_OHCI_0_IRQ;
break;
case 0x12:
dev->irq = PIC_OHCI_1_IRQ;
break;
case 0x13:
dev->irq = PIC_EHCI_1_IRQ;
break;
case 0x14:
dev->irq = PIC_OHCI_2_IRQ;
break;
case 0x15:
dev->irq = PIC_OHCI_3_IRQ;
break;
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_NETLOGIC, PCI_DEVICE_ID_NLM_EHCI,
nlm_usb_fixup_final);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_NETLOGIC, PCI_DEVICE_ID_NLM_OHCI,
nlm_usb_fixup_final);