diff options
| -rw-r--r-- | drivers/usb/host/Makefile | 1 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-atmel.c | 89 |
2 files changed, 90 insertions, 0 deletions
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 59c3e57..4547f37 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -36,6 +36,7 @@ COBJS-$(CONFIG_USB_SL811HS) += sl811-hcd.o # echi COBJS-$(CONFIG_USB_EHCI) += ehci-hcd.o COBJS-$(CONFIG_USB_EHCI_ARMADA100) += ehci-armada100.o utmi-armada100.o +COBJS-$(CONFIG_USB_EHCI_ATMEL) += ehci-atmel.o ifdef CONFIG_MPC512X COBJS-$(CONFIG_USB_EHCI_FSL) += ehci-mpc512x.o else diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c new file mode 100644 index 0000000..532db22 --- /dev/null +++ b/drivers/usb/host/ehci-atmel.c @@ -0,0 +1,89 @@ +/* + * (C) Copyright 2012 + * Atmel Semiconductor <www.atmel.com> + * Written-by: Bo Shen <voice.shen@atmel.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <common.h> +#include <watchdog.h> +#include <usb.h> +#include <asm/io.h> +#include <asm/arch/hardware.h> +#include <asm/arch/at91_pmc.h> +#include <asm/arch/clk.h> + +#include "ehci.h" +#include "ehci-core.h" + +/* Enable UTMI PLL time out 500us + * 10 times as datasheet specified + */ +#define EN_UPLL_TIMEOUT 500UL + +int ehci_hcd_init(void) +{ + at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; + ulong start_time, tmp_time; + + start_time = get_timer(0); + /* Enable UTMI PLL */ + writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr); + while (readl(&pmc->sr) & AT91_PMC_LOCKU != AT91_PMC_LOCKU) { + WATCHDOG_RESET(); + tmp_time = get_timer(0); + if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) { + printf("ERROR: failed to enable UPLL\n"); + return -1; + } + } + + /* Enable USB Host clock */ + writel(1 << ATMEL_ID_UHPHS, &pmc->pcer); + + hccr = (struct ehci_hccr *)ATMEL_BASE_EHCI; + hcor = (struct ehci_hcor *)((uint32_t)hccr + + HC_LENGTH(ehci_readl(&hccr->cr_capbase))); + + return 0; +} + +int ehci_hcd_stop(void) +{ + at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; + ulong start_time, tmp_time; + + /* Disable USB Host Clock */ + writel(1 << ATMEL_ID_UHPHS, &pmc->pcdr); + + start_time = get_timer(0); + /* Disable UTMI PLL */ + writel(readl(&pmc->uckr) & ~AT91_PMC_UPLLEN, &pmc->uckr); + while (readl(&pmc->sr) & AT91_PMC_LOCKU == AT91_PMC_LOCKU) { + WATCHDOG_RESET(); + tmp_time = get_timer(0); + if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) { + printf("ERROR: failed to stop UPLL\n"); + return -1; + } + } + + return 0; +} |