[U-Boot] [PATCH 5/6] usb: add Marvell Kirkwood ehci host controller driver

Prafulla Wadaskar
2009-06-29T15:26:43Z

This driver is tested on Sheevaplug platform

Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
---
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ehci-kirkwood.c | 108 ++++++++++++++++++++++++++++++++++++++
2 files changed, 109 insertions(+), 0 deletions(-)
create mode 100644 drivers/usb/host/ehci-kirkwood.c

diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index ec1d689..940d4a8 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -37,6 +37,7 @@ COBJS-$(CONFIG_USB_SL811HS) += sl811-hcd.o
COBJS-$(CONFIG_USB_EHCI) += ehci-hcd.o
COBJS-$(CONFIG_USB_EHCI_FSL) += ehci-fsl.o
COBJS-$(CONFIG_USB_EHCI_IXP4XX) += ehci-ixp.o
+COBJS-$(CONFIG_USB_EHCI_KIRKWOOD) += ehci-kirkwood.o
COBJS-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o
COBJS-$(CONFIG_USB_EHCI_VCT) += ehci-vct.o

diff --git a/drivers/usb/host/ehci-kirkwood.c b/drivers/usb/host/ehci-kirkwood.c
new file mode 100644
index 0000000..64997b8
--- /dev/null
+++ b/drivers/usb/host/ehci-kirkwood.c
@@ -0,0 +1,108 @@
+/*
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.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 <asm/io.h>
+#include <usb.h>
+#include "ehci.h"
+#include "ehci-core.h"
+#include <asm/arch/kirkwood.h>
+
+#define rdl(off) readl(KW_USB20_BASE + (off))
+#define wrl(off, val) writel((val), KW_USB20_BASE + (off))
+
+#define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4))
+#define USB_WINDOW_BASE(i) (0x324 + ((i) << 4))
+#define USB_TARGET_DRAM 0x0
+
+/*
+ * USB 2.0 Bridge Address Decoding registers setup
+ */
+static void usb_brg_adrdec_setup(void)
+{
+ int i;
+ u32 size, attrib;
+
+ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+
+ /* Enable DRAM bank */
+ switch (i) {
+ case 0:
+ attrib = KWCPU_ATTR_DRAM_CS0;
+ break;
+ case 1:
+ attrib = KWCPU_ATTR_DRAM_CS1;
+ break;
+ case 2:
+ attrib = KWCPU_ATTR_DRAM_CS2;
+ break;
+ case 3:
+ attrib = KWCPU_ATTR_DRAM_CS3;
+ break;
+ default:
+ /* invalide bank, disable access */
+ attrib = 0;
+ break;
+ }
+
+ size = kw_sdram_bs(i);
+ if ((size) && (attrib))
+ wrl(USB_WINDOW_CTRL(i),
+ KWCPU_WIN_CTRL_DATA(size, USB_TARGET_DRAM,
+ attrib, KWCPU_WIN_ENABLE));
+ else
+ wrl(USB_WINDOW_CTRL(i), KWCPU_WIN_DISABLE);
+
+ wrl(USB_WINDOW_BASE(i), kw_sdram_bar(i));
+ }
+}
+
+/*
+ * Create the appropriate control structures to manage
+ * a new EHCI host controller.
+ */
+int ehci_hcd_init(void)
+{
+ usb_brg_adrdec_setup();
+
+ hccr = (struct ehci_hccr *)(KW_USB20_BASE + 0x100);
+ hcor = (struct ehci_hcor *)((uint32_t) hccr
+ + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+
+ debug("Kirkwood-ehci: init hccr %x and hcor %x hc_length %d\n",
+ (uint32_t)hccr, (uint32_t)hcor,
+ (uint32_t)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+
+ return 0;
+}
+
+/*
+ * Destroy the appropriate control structures corresponding
+ * the the EHCI host controller.
+ */
+int ehci_hcd_stop(void)
+{
+ return 0;
+}
+
--
1.5.3.3