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GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

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lai
2026-09-06 03:52:57 +08:00
commit b1928b41c0
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source/bootloader/u-boot-2020.01/arch/arm/cpu/pxa/usb.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2006
* Markus Klotzbuecher, DENX Software Engineering <mk@denx.de>
*/
#include <common.h>
#if defined(CONFIG_USB_OHCI_NEW) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT)
# if defined(CONFIG_CPU_MONAHANS) || defined(CONFIG_CPU_PXA27X)
#include <asm/arch/pxa-regs.h>
#include <asm/io.h>
#include <usb.h>
int usb_cpu_init(void)
{
#if defined(CONFIG_CPU_MONAHANS)
/* Enable USB host clock. */
writel(readl(CKENA) | CKENA_2_USBHOST | CKENA_20_UDC, CKENA);
udelay(100);
#endif
#if defined(CONFIG_CPU_PXA27X)
/* Enable USB host clock. */
writel(readl(CKEN) | CKEN10_USBHOST, CKEN);
#endif
#if defined(CONFIG_CPU_MONAHANS)
/* Configure Port 2 for Host (USB Client Registers) */
writel(0x3000c, UP2OCR);
#endif
writel(readl(UHCHR) | UHCHR_FHR, UHCHR);
mdelay(11);
writel(readl(UHCHR) & ~UHCHR_FHR, UHCHR);
writel(readl(UHCHR) | UHCHR_FSBIR, UHCHR);
while (readl(UHCHR) & UHCHR_FSBIR)
udelay(1);
#if defined(CONFIG_CPU_MONAHANS) || defined(CONFIG_PXA27X)
writel(readl(UHCHR) & ~UHCHR_SSEP0, UHCHR);
#endif
#if defined(CONFIG_CPU_PXA27X)
writel(readl(UHCHR) & ~UHCHR_SSEP2, UHCHR);
#endif
writel(readl(UHCHR) & ~(UHCHR_SSEP1 | UHCHR_SSE), UHCHR);
return 0;
}
int usb_cpu_stop(void)
{
writel(readl(UHCHR) | UHCHR_FHR, UHCHR);
udelay(11);
writel(readl(UHCHR) & ~UHCHR_FHR, UHCHR);
writel(readl(UHCCOMS) | UHCCOMS_HCR, UHCCOMS);
udelay(10);
#if defined(CONFIG_CPU_MONAHANS) || defined(CONFIG_PXA27X)
writel(readl(UHCHR) | UHCHR_SSEP0, UHCHR);
#endif
#if defined(CONFIG_CPU_PXA27X)
writel(readl(UHCHR) | UHCHR_SSEP2, UHCHR);
#endif
writel(readl(UHCHR) | UHCHR_SSEP1 | UHCHR_SSE, UHCHR);
#if defined(CONFIG_CPU_MONAHANS)
/* Disable USB host clock. */
writel(readl(CKENA) & ~(CKENA_2_USBHOST | CKENA_20_UDC), CKENA);
udelay(100);
#endif
#if defined(CONFIG_CPU_PXA27X)
/* Disable USB host clock. */
writel(readl(CKEN) & ~CKEN10_USBHOST, CKEN);
#endif
return 0;
}
int usb_cpu_init_fail(void)
{
return usb_cpu_stop();
}
# endif /* defined(CONFIG_CPU_MONAHANS) || defined(CONFIG_CPU_PXA27X) */
#endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */