diff options
Diffstat (limited to 'drivers/usb/host/ehci-mpc512x.c')
| -rw-r--r-- | drivers/usb/host/ehci-mpc512x.c | 159 |
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 ); +} |