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-rw-r--r--drivers/usb/host/Makefile1
-rw-r--r--drivers/usb/host/ehci-atmel.c89
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;
+}