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