blob: e98f79f9ccdd1c18bfa3ba973bfb4c0df55c9468 [file] [log] [blame]
Damien Dusha7c3be662010-10-14 15:27:06 +02001/*
2 * (C) Copyright 2010, Damien Dusha, <d.dusha@gmail.com>
3 *
4 * (C) Copyright 2009, Value Team S.p.A.
5 * Francesco Rendine, <francesco.rendine@valueteam.com>
6 *
7 * (C) Copyright 2009 Freescale Semiconductor, Inc.
8 *
9 * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
10 *
11 * Author: Tor Krill tor@excito.com
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 * MA 02111-1307 USA
27 */
28
29#include <common.h>
30#include <pci.h>
31#include <usb.h>
32#include <asm/io.h>
33#include <usb/ehci-fsl.h>
34
35#include "ehci.h"
Damien Dusha7c3be662010-10-14 15:27:06 +020036
37static void fsl_setup_phy(volatile struct ehci_hcor *);
38static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci);
39static int reset_usb_controller(volatile struct usb_ehci *ehci);
40static void usb_platform_dr_init(volatile struct usb_ehci *ehci);
41
42/*
43 * Initialize SOC FSL EHCI Controller
44 *
45 * This code is derived from EHCI FSL USB Linux driver for MPC5121
46 *
47 */
Lucas Stach3494a4c2012-09-26 00:14:35 +020048int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
Damien Dusha7c3be662010-10-14 15:27:06 +020049{
50 volatile struct usb_ehci *ehci;
51
52 /* Hook the memory mapped registers for EHCI-Controller */
53 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
Lucas Stach3494a4c2012-09-26 00:14:35 +020054 *hccr = (struct ehci_hccr *)((uint32_t)&(ehci->caplength));
55 *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
56 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
Damien Dusha7c3be662010-10-14 15:27:06 +020057
58 /* configure interface for UTMI_WIDE */
59 usb_platform_dr_init(ehci);
60
61 /* Init Phy USB0 to UTMI+ */
Lucas Stach3494a4c2012-09-26 00:14:35 +020062 fsl_setup_phy(*hcor);
Damien Dusha7c3be662010-10-14 15:27:06 +020063
64 /* Set to host mode */
65 fsl_platform_set_host_mode(ehci);
66
67 /*
68 * Setting the burst size seems to be required to prevent the
69 * USB from hanging when communicating with certain USB Mass
70 * storage devices. This was determined by analysing the
71 * EHCI registers under Linux vs U-Boot and burstsize was the
72 * major non-interrupt related difference between the two
73 * implementations.
74 *
75 * Some USB sticks behave better than others. In particular,
76 * the following USB stick is especially problematic:
77 * 0930:6545 Toshiba Corp
78 *
79 * The burstsize is set here to match the Linux implementation.
80 */
81 out_be32(&ehci->burstsize, FSL_EHCI_TXPBURST(8) |
82 FSL_EHCI_RXPBURST(8));
83
84 return 0;
85}
86
87/*
88 * Destroy the appropriate control structures corresponding
89 * the the EHCI host controller.
90 */
Lucas Stach3494a4c2012-09-26 00:14:35 +020091int ehci_hcd_stop(int index)
Damien Dusha7c3be662010-10-14 15:27:06 +020092{
93 volatile struct usb_ehci *ehci;
94 int exit_status = 0;
95
Lucas Stach3494a4c2012-09-26 00:14:35 +020096 /* Reset the USB controller */
97 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
98 exit_status = reset_usb_controller(ehci);
Damien Dusha7c3be662010-10-14 15:27:06 +020099
100 return exit_status;
101}
102
103static int reset_usb_controller(volatile struct usb_ehci *ehci)
104{
105 unsigned int i;
106
107 /* Command a reset of the USB Controller */
108 out_be32(&(ehci->usbcmd), EHCI_FSL_USBCMD_RST);
109
110 /* Wait for the reset process to finish */
111 for (i = 65535 ; i > 0 ; i--) {
112 /*
113 * The host will set this bit to zero once the
114 * reset process is complete
115 */
116 if ((in_be32(&(ehci->usbcmd)) & EHCI_FSL_USBCMD_RST) == 0)
117 return 0;
118 }
119
120 /* Hub did not reset in time */
121 return -1;
122}
123
124static void fsl_setup_phy(volatile struct ehci_hcor *hcor)
125{
126 uint32_t portsc;
127
128 portsc = ehci_readl(&hcor->or_portsc[0]);
129 portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
130
131 /* Enable the phy mode to UTMI Wide */
132 portsc |= PORT_PTS_PTW;
133 portsc |= PORT_PTS_UTMI;
134
135 ehci_writel(&hcor->or_portsc[0], portsc);
136}
137
138static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci)
139{
140 uint32_t temp;
141
142 temp = in_le32(&ehci->usbmode);
143 temp |= CM_HOST | ES_BE;
144 out_le32(&ehci->usbmode, temp);
145}
146
147static void usb_platform_dr_init(volatile struct usb_ehci *ehci)
148{
149 /* Configure interface for UTMI_WIDE */
150 out_be32(&ehci->isiphyctrl, PHYCTRL_PHYE | PHYCTRL_PXE);
151 out_be32(&ehci->usbgenctrl, GC_PPP | GC_PFP );
152}