1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
new file mode 100644
index 000000000..532db2289
--- /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;
+}