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path: root/drivers/usb/host/ehci-mpc512x.c
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Diffstat (limited to 'drivers/usb/host/ehci-mpc512x.c')
-rw-r--r--drivers/usb/host/ehci-mpc512x.c159
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-mpc512x.c b/drivers/usb/host/ehci-mpc512x.c
new file mode 100644
index 0000000..d360108
--- /dev/null
+++ b/drivers/usb/host/ehci-mpc512x.c
@@ -0,0 +1,159 @@
+/*
+ * (C) Copyright 2010, Damien Dusha, <d.dusha@gmail.com>
+ *
+ * (C) Copyright 2009, Value Team S.p.A.
+ * Francesco Rendine, <francesco.rendine@valueteam.com>
+ *
+ * (C) Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
+ *
+ * Author: Tor Krill tor@excito.com
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <pci.h>
+#include <usb.h>
+#include <asm/io.h>
+#include <usb/ehci-fsl.h>
+
+#include "ehci.h"
+#include "ehci-core.h"
+
+static void fsl_setup_phy(volatile struct ehci_hcor *);
+static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci);
+static int reset_usb_controller(volatile struct usb_ehci *ehci);
+static void usb_platform_dr_init(volatile struct usb_ehci *ehci);
+
+/*
+ * Initialize SOC FSL EHCI Controller
+ *
+ * This code is derived from EHCI FSL USB Linux driver for MPC5121
+ *
+ */
+int ehci_hcd_init(void)
+{
+ volatile struct usb_ehci *ehci;
+
+ /* Hook the memory mapped registers for EHCI-Controller */
+ ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
+ hccr = (struct ehci_hccr *)((uint32_t)&(ehci->caplength));
+ hcor = (struct ehci_hcor *)((uint32_t) hccr +
+ HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+
+ /* configure interface for UTMI_WIDE */
+ usb_platform_dr_init(ehci);
+
+ /* Init Phy USB0 to UTMI+ */
+ fsl_setup_phy(hcor);
+
+ /* Set to host mode */
+ fsl_platform_set_host_mode(ehci);
+
+ /*
+ * Setting the burst size seems to be required to prevent the
+ * USB from hanging when communicating with certain USB Mass
+ * storage devices. This was determined by analysing the
+ * EHCI registers under Linux vs U-Boot and burstsize was the
+ * major non-interrupt related difference between the two
+ * implementations.
+ *
+ * Some USB sticks behave better than others. In particular,
+ * the following USB stick is especially problematic:
+ * 0930:6545 Toshiba Corp
+ *
+ * The burstsize is set here to match the Linux implementation.
+ */
+ out_be32(&ehci->burstsize, FSL_EHCI_TXPBURST(8) |
+ FSL_EHCI_RXPBURST(8));
+
+ return 0;
+}
+
+/*
+ * Destroy the appropriate control structures corresponding
+ * the the EHCI host controller.
+ */
+int ehci_hcd_stop(void)
+{
+ volatile struct usb_ehci *ehci;
+ int exit_status = 0;
+
+ if (hcor) {
+ /* Unhook struct */
+ hccr = NULL;
+ hcor = NULL;
+
+ /* Reset the USB controller */
+ ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
+ exit_status = reset_usb_controller(ehci);
+ }
+
+ return exit_status;
+}
+
+static int reset_usb_controller(volatile struct usb_ehci *ehci)
+{
+ unsigned int i;
+
+ /* Command a reset of the USB Controller */
+ out_be32(&(ehci->usbcmd), EHCI_FSL_USBCMD_RST);
+
+ /* Wait for the reset process to finish */
+ for (i = 65535 ; i > 0 ; i--) {
+ /*
+ * The host will set this bit to zero once the
+ * reset process is complete
+ */
+ if ((in_be32(&(ehci->usbcmd)) & EHCI_FSL_USBCMD_RST) == 0)
+ return 0;
+ }
+
+ /* Hub did not reset in time */
+ return -1;
+}
+
+static void fsl_setup_phy(volatile struct ehci_hcor *hcor)
+{
+ uint32_t portsc;
+
+ portsc = ehci_readl(&hcor->or_portsc[0]);
+ portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
+
+ /* Enable the phy mode to UTMI Wide */
+ portsc |= PORT_PTS_PTW;
+ portsc |= PORT_PTS_UTMI;
+
+ ehci_writel(&hcor->or_portsc[0], portsc);
+}
+
+static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci)
+{
+ uint32_t temp;
+
+ temp = in_le32(&ehci->usbmode);
+ temp |= CM_HOST | ES_BE;
+ out_le32(&ehci->usbmode, temp);
+}
+
+static void usb_platform_dr_init(volatile struct usb_ehci *ehci)
+{
+ /* Configure interface for UTMI_WIDE */
+ out_be32(&ehci->isiphyctrl, PHYCTRL_PHYE | PHYCTRL_PXE);
+ out_be32(&ehci->usbgenctrl, GC_PPP | GC_PFP );
+}