/*
* Copyright (c) 2003-2013 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 <linux/irq.h>
#include <asm/netlogic/common.h>
#include <asm/netlogic/haldefs.h>
#include <asm/netlogic/xlp-hal/iomap.h>
#include <asm/netlogic/xlp-hal/xlp.h>
#define XLPII_USB3_CTL_0 0xc0
#define XLPII_VAUXRST BIT(0)
#define XLPII_VCCRST BIT(1)
#define XLPII_NUM2PORT 9
#define XLPII_NUM3PORT 13
#define XLPII_RTUNEREQ BIT(20)
#define XLPII_MS_CSYSREQ BIT(21)
#define XLPII_XS_CSYSREQ BIT(22)
#define XLPII_RETENABLEN BIT(23)
#define XLPII_TX2RX BIT(24)
#define XLPII_XHCIREV BIT(25)
#define XLPII_ECCDIS BIT(26)
#define XLPII_USB3_INT_REG 0xc2
#define XLPII_USB3_INT_MASK 0xc3
#define XLPII_USB_PHY_TEST 0xc6
#define XLPII_PRESET BIT(0)
#define XLPII_ATERESET BIT(1)
#define XLPII_LOOPEN BIT(2)
#define XLPII_TESTPDHSP BIT(3)
#define XLPII_TESTPDSSP BIT(4)
#define XLPII_TESTBURNIN BIT(5)
#define XLPII_USB_PHY_LOS_LV 0xc9
#define XLPII_LOSLEV 0
#define XLPII_LOSBIAS 5
#define XLPII_SQRXTX 8
#define XLPII_TXBOOST 11
#define XLPII_RSLKSEL 16
#define XLPII_FSEL 20
#define XLPII_USB_RFCLK_REG 0xcc
#define XLPII_VVLD 30
#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_xlpii_get_usb_pcibase(node, inst) \
nlm_pcicfg_base(XLP2XX_IO_USB_OFFSET(node, inst))
#define nlm_xlpii_get_usb_regbase(node, inst) \
(nlm_xlpii_get_usb_pcibase(node, inst) + XLP_IO_PCI_HDRSZ)
static void xlpii_usb_ack(struct irq_data *data)
{
u64 port_addr;
switch (data->irq) {
case PIC_2XX_XHCI_0_IRQ:
port_addr = nlm_xlpii_get_usb_regbase(0, 1);
break;
case PIC_2XX_XHCI_1_IRQ:
port_addr = nlm_xlpii_get_usb_regbase(0, 2);
break;
case PIC_2XX_XHCI_2_IRQ:
port_addr = nlm_xlpii_get_usb_regbase(0, 3);
break;
default:
pr_err("No matching USB irq!\n");
return;
}
nlm_write_usb_reg(port_addr, XLPII_USB3_INT_REG, 0xffffffff);
}
static void nlm_xlpii_usb_hw_reset(int node, int port)
{
u64 port_addr, xhci_base, pci_base;
void __iomem *corebase;
u32 val;
port_addr = nlm_xlpii_get_usb_regbase(node, port);
/* Set frequency */
val = nlm_read_usb_reg(port_addr, XLPII_USB_PHY_LOS_LV);
val &= ~(0x3f << XLPII_FSEL);
val |= (0x27 << XLPII_FSEL);
nlm_write_usb_reg(port_addr, XLPII_USB_PHY_LOS_LV, val);
val = nlm_read_usb_reg(port_addr, XLPII_USB_RFCLK_REG);
val |= (1 << XLPII_VVLD);
nlm_write_usb_reg(port_addr, XLPII_USB_RFCLK_REG, val);
/* PHY reset */
val = nlm_read_usb_reg(port_addr, XLPII_USB_PHY_TEST);
val &= (XLPII_ATERESET | XLPII_LOOPEN | XLPII_TESTPDHSP
| XLPII_TESTPDSSP | XLPII_TESTBURNIN);
nlm_write_usb_reg(port_addr, XLPII_USB_PHY_TEST, val);
/* Setup control register */
val = XLPII_VAUXRST | XLPII_VCCRST | (1 << XLPII_NUM2PORT)
| (1 << XLPII_NUM3PORT) | XLPII_MS_CSYSREQ | XLPII_XS_CSYSREQ
| XLPII_RETENABLEN | XLPII_XHCIREV;
nlm_write_usb_reg(port_addr, XLPII_USB3_CTL_0, val);
/* Enable interrupts */
nlm_write_usb_reg(port_addr, XLPII_USB3_INT_MASK, 0x00000001);
/* Clear all interrupts */
nlm_write_usb_reg(port_addr, XLPII_USB3_INT_REG, 0xffffffff);
udelay(2000);
/* XHCI configuration at PCI mem */
pci_base = nlm_xlpii_get_usb_pcibase(node, port);
xhci_base = nlm_read_usb_reg(pci_base, 0x4) & ~0xf;
corebase = ioremap(xhci_base, 0x10000);
if (!corebase)
return;
writel(0x240002, corebase + 0xc2c0);
/* GCTL 0xc110 */
val = readl(corebase + 0xc110);
val &= ~(0x3 << 12);
val |= (1 << 12);
writel(val, corebase + 0xc110);
udelay(100);
/* PHYCFG 0xc200 */
val = readl(corebase + 0xc200);
val &= ~(1 << 6);
writel(val, corebase + 0xc200);
udelay(100);
/* PIPECTL 0xc2c0 */
val = readl(corebase + 0xc2c0);
val &= ~(1 << 17);
writel(val, corebase + 0xc2c0);
iounmap(corebase);
}
static int __init nlm_platform_xlpii_usb_init(void)
{
if (!cpu_is_xlpii())
return 0;
pr_info("Initializing 2XX USB Interface\n");
nlm_xlpii_usb_hw_reset(0, 1);
nlm_xlpii_usb_hw_reset(0, 2);
nlm_xlpii_usb_hw_reset(0, 3);
nlm_set_pic_extra_ack(0, PIC_2XX_XHCI_0_IRQ, xlpii_usb_ack);
nlm_set_pic_extra_ack(0, PIC_2XX_XHCI_1_IRQ, xlpii_usb_ack);
nlm_set_pic_extra_ack(0, PIC_2XX_XHCI_2_IRQ, xlpii_usb_ack);
return 0;
}
arch_initcall(nlm_platform_xlpii_usb_init);
static u64 xlp_usb_dmamask = ~(u32)0;
/* Fixup IRQ for USB devices on XLP the 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 0x21:
dev->irq = PIC_2XX_XHCI_0_IRQ;
break;
case 0x22:
dev->irq = PIC_2XX_XHCI_1_IRQ;
break;
case 0x23:
dev->irq = PIC_2XX_XHCI_2_IRQ;
break;
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_NETLOGIC, PCI_DEVICE_ID_NLM_XHCI,
nlm_usb_fixup_final);
