/* * (C) Copyright 2006 * DENX Software Engineering * * SPDX-License-Identifier: GPL-2.0+ */ #include #if defined(CONFIG_USB_OHCI_NEW) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) #include #include #include #include int usb_cpu_init(void) { at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; #ifdef CONFIG_USB_ATMEL_CLK_SEL_PLLB /* Enable PLLB */ writel(get_pllb_init(), &pmc->pllbr); while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB) ; #ifdef CONFIG_AT91SAM9N12 writel(AT91_PMC_USBS_USB_PLLB | AT91_PMC_USB_DIV_2, &pmc->usb); #endif #elif defined(CONFIG_USB_ATMEL_CLK_SEL_UPLL) /* Enable UPLL */ writel(readl(&pmc->uckr) | AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr); while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU) ; /* Select PLLA as input clock of OHCI */ writel(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10, &pmc->usb); #endif /* Enable USB host clock. */ #ifdef CPU_HAS_PCR at91_periph_clk_enable(ATMEL_ID_UHP); #else writel(1 << ATMEL_ID_UHP, &pmc->pcer); #endif #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10) writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scer); #else writel(ATMEL_PMC_UHP, &pmc->scer); #endif return 0; } int usb_cpu_stop(void) { at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; /* Disable USB host clock. */ #ifdef CPU_HAS_PCR at91_periph_clk_disable(ATMEL_ID_UHP); #else writel(1 << ATMEL_ID_UHP, &pmc->pcdr); #endif #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10) writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scdr); #else writel(ATMEL_PMC_UHP, &pmc->scdr); #endif #ifdef CONFIG_USB_ATMEL_CLK_SEL_PLLB #ifdef CONFIG_AT91SAM9N12 writel(0, &pmc->usb); #endif /* Disable PLLB */ writel(0, &pmc->pllbr); while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0) ; #elif defined(CONFIG_USB_ATMEL_CLK_SEL_UPLL) /* Disable UPLL */ writel(readl(&pmc->uckr) & (~AT91_PMC_UPLLEN), &pmc->uckr); while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU) ; #endif return 0; } int usb_cpu_init_fail(void) { return usb_cpu_stop(); } #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */