138 lines
4.1 KiB
Diff
138 lines
4.1 KiB
Diff
From e38f13bd6408769c0b565bb1079024f496eee121 Mon Sep 17 00:00:00 2001
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From: Florian Fainelli <florian@openwrt.org>
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Date: Mon, 28 Jan 2013 20:06:27 +0100
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Subject: [PATCH 09/11] MIPS: BCM63XX: add support for the on-chip EHCI
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controller
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Broadcom BCM63XX SoCs include an on-chip EHCI controller which can be
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driven by the generic ehci-platform driver by using specific power
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on/off/suspend callbacks to manage clocks and hardware specific
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configuration.
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Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
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Signed-off-by: Florian Fainelli <florian@openwrt.org>
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---
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arch/mips/bcm63xx/Makefile | 2 +-
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arch/mips/bcm63xx/dev-usb-ehci.c | 92 ++++++++++++++++++++
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.../asm/mach-bcm63xx/bcm63xx_dev_usb_ehci.h | 6 ++
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3 files changed, 99 insertions(+), 1 deletion(-)
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create mode 100644 arch/mips/bcm63xx/dev-usb-ehci.c
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create mode 100644 arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_usb_ehci.h
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--- a/arch/mips/bcm63xx/Makefile
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+++ b/arch/mips/bcm63xx/Makefile
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@@ -1,7 +1,8 @@
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obj-y += clk.o cpu.o cs.o gpio.o irq.o nvram.o prom.o reset.o \
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setup.o timer.o dev-dsp.o dev-enet.o dev-flash.o \
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dev-pcmcia.o dev-rng.o dev-spi.o dev-hsspi.o dev-uart.o \
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- dev-wdt.o dev-usb-ohci.o dev-usb-usbd.o usb-common.o
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+ dev-wdt.o dev-usb-ehci.o dev-usb-ohci.o dev-usb-usbd.o \
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+ usb-common.o
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obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
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obj-y += boards/
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--- /dev/null
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+++ b/arch/mips/bcm63xx/dev-usb-ehci.c
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@@ -0,0 +1,92 @@
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+/*
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+ * This file is subject to the terms and conditions of the GNU General Public
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+ * License. See the file "COPYING" in the main directory of this archive
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+ * for more details.
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+ *
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+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
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+ * Copyright (C) 2013 Florian Fainelli <florian@openwrt.org>
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+ */
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+
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+#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/platform_device.h>
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+#include <linux/clk.h>
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+#include <linux/delay.h>
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+#include <linux/usb/ehci_pdriver.h>
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+#include <linux/dma-mapping.h>
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+
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+#include <bcm63xx_cpu.h>
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+#include <bcm63xx_regs.h>
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+#include <bcm63xx_io.h>
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+#include <bcm63xx_usb_priv.h>
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+#include <bcm63xx_dev_usb_ehci.h>
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+
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+static struct resource ehci_resources[] = {
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+ {
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+ .start = -1, /* filled at runtime */
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+ .end = -1, /* filled at runtime */
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+ .flags = IORESOURCE_MEM,
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+ },
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+ {
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+ .start = -1, /* filled at runtime */
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+ .flags = IORESOURCE_IRQ,
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+ },
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+};
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+
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+static u64 ehci_dmamask = DMA_BIT_MASK(32);
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+
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+static struct clk *usb_host_clock;
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+
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+static int bcm63xx_ehci_power_on(struct platform_device *pdev)
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+{
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+ usb_host_clock = clk_get(&pdev->dev, "usbh");
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+ if (IS_ERR_OR_NULL(usb_host_clock))
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+ return -ENODEV;
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+
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+ clk_prepare_enable(usb_host_clock);
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+
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+ bcm63xx_usb_priv_ehci_cfg_set();
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+
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+ return 0;
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+}
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+
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+static void bcm63xx_ehci_power_off(struct platform_device *pdev)
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+{
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+ if (!IS_ERR_OR_NULL(usb_host_clock)) {
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+ clk_disable_unprepare(usb_host_clock);
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+ clk_put(usb_host_clock);
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+ }
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+}
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+
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+static struct usb_ehci_pdata bcm63xx_ehci_pdata = {
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+ .big_endian_desc = 1,
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+ .big_endian_mmio = 1,
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+ .power_on = bcm63xx_ehci_power_on,
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+ .power_off = bcm63xx_ehci_power_off,
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+ .power_suspend = bcm63xx_ehci_power_off,
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+};
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+
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+static struct platform_device bcm63xx_ehci_device = {
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+ .name = "ehci-platform",
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+ .id = -1,
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+ .num_resources = ARRAY_SIZE(ehci_resources),
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+ .resource = ehci_resources,
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+ .dev = {
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+ .platform_data = &bcm63xx_ehci_pdata,
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+ .dma_mask = &ehci_dmamask,
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+ .coherent_dma_mask = DMA_BIT_MASK(32),
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+ },
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+};
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+
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+int __init bcm63xx_ehci_register(void)
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+{
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+ if (!BCMCPU_IS_6328() && !BCMCPU_IS_6358() && !BCMCPU_IS_6362() && !BCMCPU_IS_6368())
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+ return 0;
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+
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+ ehci_resources[0].start = bcm63xx_regset_address(RSET_EHCI0);
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+ ehci_resources[0].end = ehci_resources[0].start;
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+ ehci_resources[0].end += RSET_EHCI_SIZE - 1;
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+ ehci_resources[1].start = bcm63xx_get_irq_number(IRQ_EHCI0);
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+
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+ return platform_device_register(&bcm63xx_ehci_device);
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+}
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--- /dev/null
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+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_usb_ehci.h
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@@ -0,0 +1,6 @@
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+#ifndef BCM63XX_DEV_USB_EHCI_H_
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+#define BCM63XX_DEV_USB_EHCI_H_
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+
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+int bcm63xx_ehci_register(void);
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+
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+#endif /* BCM63XX_DEV_USB_EHCI_H_ */
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