2 * (C) Copyright 2010, Damien Dusha, <d.dusha@gmail.com>
4 * (C) Copyright 2009, Value Team S.p.A.
5 * Francesco Rendine, <francesco.rendine@valueteam.com>
7 * (C) Copyright 2009 Freescale Semiconductor, Inc.
9 * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
11 * Author: Tor Krill tor@excito.com
13 * SPDX-License-Identifier: GPL-2.0+
20 #include <usb/ehci-fsl.h>
24 static void fsl_setup_phy(volatile struct ehci_hcor *);
25 static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci);
26 static int reset_usb_controller(volatile struct usb_ehci *ehci);
27 static void usb_platform_dr_init(volatile struct usb_ehci *ehci);
30 * Initialize SOC FSL EHCI Controller
32 * This code is derived from EHCI FSL USB Linux driver for MPC5121
35 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
37 volatile struct usb_ehci *ehci;
39 /* Hook the memory mapped registers for EHCI-Controller */
40 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
41 *hccr = (struct ehci_hccr *)((uint32_t)&(ehci->caplength));
42 *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
43 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
45 /* configure interface for UTMI_WIDE */
46 usb_platform_dr_init(ehci);
48 /* Init Phy USB0 to UTMI+ */
51 /* Set to host mode */
52 fsl_platform_set_host_mode(ehci);
55 * Setting the burst size seems to be required to prevent the
56 * USB from hanging when communicating with certain USB Mass
57 * storage devices. This was determined by analysing the
58 * EHCI registers under Linux vs U-Boot and burstsize was the
59 * major non-interrupt related difference between the two
62 * Some USB sticks behave better than others. In particular,
63 * the following USB stick is especially problematic:
64 * 0930:6545 Toshiba Corp
66 * The burstsize is set here to match the Linux implementation.
68 out_be32(&ehci->burstsize, FSL_EHCI_TXPBURST(8) |
69 FSL_EHCI_RXPBURST(8));
75 * Destroy the appropriate control structures corresponding
76 * the the EHCI host controller.
78 int ehci_hcd_stop(int index)
80 volatile struct usb_ehci *ehci;
83 /* Reset the USB controller */
84 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
85 exit_status = reset_usb_controller(ehci);
90 static int reset_usb_controller(volatile struct usb_ehci *ehci)
94 /* Command a reset of the USB Controller */
95 out_be32(&(ehci->usbcmd), EHCI_FSL_USBCMD_RST);
97 /* Wait for the reset process to finish */
98 for (i = 65535 ; i > 0 ; i--) {
100 * The host will set this bit to zero once the
101 * reset process is complete
103 if ((in_be32(&(ehci->usbcmd)) & EHCI_FSL_USBCMD_RST) == 0)
107 /* Hub did not reset in time */
111 static void fsl_setup_phy(volatile struct ehci_hcor *hcor)
115 portsc = ehci_readl(&hcor->or_portsc[0]);
116 portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
118 /* Enable the phy mode to UTMI Wide */
119 portsc |= PORT_PTS_PTW;
120 portsc |= PORT_PTS_UTMI;
122 ehci_writel(&hcor->or_portsc[0], portsc);
125 static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci)
129 temp = in_le32(&ehci->usbmode);
130 temp |= CM_HOST | ES_BE;
131 out_le32(&ehci->usbmode, temp);
134 static void usb_platform_dr_init(volatile struct usb_ehci *ehci)
136 /* Configure interface for UTMI_WIDE */
137 out_be32(&ehci->isiphyctrl, PHYCTRL_PHYE | PHYCTRL_PXE);
138 out_be32(&ehci->usbgenctrl, GC_PPP | GC_PFP );