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Damien Dusha29c6fbe2010-10-14 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 *
Wolfgang Denk1a459662013-07-08 09:37:19 +020013 * SPDX-License-Identifier: GPL-2.0+
Damien Dusha29c6fbe2010-10-14 15:27:06 +020014 */
15
16#include <common.h>
17#include <pci.h>
18#include <usb.h>
19#include <asm/io.h>
Mateusz Kulikowskie162c6b2016-03-31 23:12:23 +020020#include <usb/ehci-ci.h>
Damien Dusha29c6fbe2010-10-14 15:27:06 +020021
22#include "ehci.h"
Damien Dusha29c6fbe2010-10-14 15:27:06 +020023
24static void fsl_setup_phy(volatile struct ehci_hcor *);
25static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci);
26static int reset_usb_controller(volatile struct usb_ehci *ehci);
27static void usb_platform_dr_init(volatile struct usb_ehci *ehci);
28
29/*
30 * Initialize SOC FSL EHCI Controller
31 *
32 * This code is derived from EHCI FSL USB Linux driver for MPC5121
33 *
34 */
Troy Kisky127efc42013-10-10 15:27:57 -070035int ehci_hcd_init(int index, enum usb_init_type init,
36 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
Damien Dusha29c6fbe2010-10-14 15:27:06 +020037{
38 volatile struct usb_ehci *ehci;
39
40 /* Hook the memory mapped registers for EHCI-Controller */
ramneek mehresh77354e92013-09-12 16:35:49 +053041 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR;
Lucas Stach676ae062012-09-26 00:14:35 +020042 *hccr = (struct ehci_hccr *)((uint32_t)&(ehci->caplength));
43 *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
44 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
Damien Dusha29c6fbe2010-10-14 15:27:06 +020045
46 /* configure interface for UTMI_WIDE */
47 usb_platform_dr_init(ehci);
48
49 /* Init Phy USB0 to UTMI+ */
Lucas Stach676ae062012-09-26 00:14:35 +020050 fsl_setup_phy(*hcor);
Damien Dusha29c6fbe2010-10-14 15:27:06 +020051
52 /* Set to host mode */
53 fsl_platform_set_host_mode(ehci);
54
55 /*
56 * Setting the burst size seems to be required to prevent the
57 * USB from hanging when communicating with certain USB Mass
58 * storage devices. This was determined by analysing the
59 * EHCI registers under Linux vs U-Boot and burstsize was the
60 * major non-interrupt related difference between the two
61 * implementations.
62 *
63 * Some USB sticks behave better than others. In particular,
64 * the following USB stick is especially problematic:
65 * 0930:6545 Toshiba Corp
66 *
67 * The burstsize is set here to match the Linux implementation.
68 */
69 out_be32(&ehci->burstsize, FSL_EHCI_TXPBURST(8) |
70 FSL_EHCI_RXPBURST(8));
71
72 return 0;
73}
74
75/*
76 * Destroy the appropriate control structures corresponding
77 * the the EHCI host controller.
78 */
Lucas Stach676ae062012-09-26 00:14:35 +020079int ehci_hcd_stop(int index)
Damien Dusha29c6fbe2010-10-14 15:27:06 +020080{
81 volatile struct usb_ehci *ehci;
82 int exit_status = 0;
83
Lucas Stach676ae062012-09-26 00:14:35 +020084 /* Reset the USB controller */
ramneek mehresh77354e92013-09-12 16:35:49 +053085 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR;
Lucas Stach676ae062012-09-26 00:14:35 +020086 exit_status = reset_usb_controller(ehci);
Damien Dusha29c6fbe2010-10-14 15:27:06 +020087
88 return exit_status;
89}
90
91static int reset_usb_controller(volatile struct usb_ehci *ehci)
92{
93 unsigned int i;
94
95 /* Command a reset of the USB Controller */
96 out_be32(&(ehci->usbcmd), EHCI_FSL_USBCMD_RST);
97
98 /* Wait for the reset process to finish */
99 for (i = 65535 ; i > 0 ; i--) {
100 /*
101 * The host will set this bit to zero once the
102 * reset process is complete
103 */
104 if ((in_be32(&(ehci->usbcmd)) & EHCI_FSL_USBCMD_RST) == 0)
105 return 0;
106 }
107
108 /* Hub did not reset in time */
109 return -1;
110}
111
112static void fsl_setup_phy(volatile struct ehci_hcor *hcor)
113{
114 uint32_t portsc;
115
116 portsc = ehci_readl(&hcor->or_portsc[0]);
117 portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
118
119 /* Enable the phy mode to UTMI Wide */
120 portsc |= PORT_PTS_PTW;
121 portsc |= PORT_PTS_UTMI;
122
123 ehci_writel(&hcor->or_portsc[0], portsc);
124}
125
126static void fsl_platform_set_host_mode(volatile struct usb_ehci *ehci)
127{
128 uint32_t temp;
129
130 temp = in_le32(&ehci->usbmode);
131 temp |= CM_HOST | ES_BE;
132 out_le32(&ehci->usbmode, temp);
133}
134
135static void usb_platform_dr_init(volatile struct usb_ehci *ehci)
136{
137 /* Configure interface for UTMI_WIDE */
138 out_be32(&ehci->isiphyctrl, PHYCTRL_PHYE | PHYCTRL_PXE);
139 out_be32(&ehci->usbgenctrl, GC_PPP | GC_PFP );
140}