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-rw-r--r--arch/arm/mach-imx/ehci-imx5.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/ehci-imx5.c b/arch/arm/mach-imx/ehci-imx5.c
new file mode 100644
index 000000000000..c17fa131728b
--- /dev/null
+++ b/arch/arm/mach-imx/ehci-imx5.c
@@ -0,0 +1,156 @@
1/*
2 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
3 * Copyright (C) 2010 Freescale Semiconductor, Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 */
15
16#include <linux/platform_device.h>
17#include <linux/io.h>
18
19#include <mach/hardware.h>
20#include <mach/mxc_ehci.h>
21
22#define MXC_OTG_OFFSET 0
23#define MXC_H1_OFFSET 0x200
24#define MXC_H2_OFFSET 0x400
25
26/* USB_CTRL */
27#define MXC_OTG_UCTRL_OWIE_BIT (1 << 27) /* OTG wakeup intr enable */
28#define MXC_OTG_UCTRL_OPM_BIT (1 << 24) /* OTG power mask */
29#define MXC_H1_UCTRL_H1UIE_BIT (1 << 12) /* Host1 ULPI interrupt enable */
30#define MXC_H1_UCTRL_H1WIE_BIT (1 << 11) /* HOST1 wakeup intr enable */
31#define MXC_H1_UCTRL_H1PM_BIT (1 << 8) /* HOST1 power mask */
32
33/* USB_PHY_CTRL_FUNC */
34#define MXC_OTG_PHYCTRL_OC_DIS_BIT (1 << 8) /* OTG Disable Overcurrent Event */
35#define MXC_H1_OC_DIS_BIT (1 << 5) /* UH1 Disable Overcurrent Event */
36
37/* USBH2CTRL */
38#define MXC_H2_UCTRL_H2UIE_BIT (1 << 8)
39#define MXC_H2_UCTRL_H2WIE_BIT (1 << 7)
40#define MXC_H2_UCTRL_H2PM_BIT (1 << 4)
41
42#define MXC_USBCMD_OFFSET 0x140
43
44/* USBCMD */
45#define MXC_UCMD_ITC_NO_THRESHOLD_MASK (~(0xff << 16)) /* Interrupt Threshold Control */
46
47int mx51_initialize_usb_hw(int port, unsigned int flags)
48{
49 unsigned int v;
50 void __iomem *usb_base;
51 void __iomem *usbotg_base;
52 void __iomem *usbother_base;
53 int ret = 0;
54
55 usb_base = ioremap(MX51_USB_OTG_BASE_ADDR, SZ_4K);
56 if (!usb_base) {
57 printk(KERN_ERR "%s(): ioremap failed\n", __func__);
58 return -ENOMEM;
59 }
60
61 switch (port) {
62 case 0: /* OTG port */
63 usbotg_base = usb_base + MXC_OTG_OFFSET;
64 break;
65 case 1: /* Host 1 port */
66 usbotg_base = usb_base + MXC_H1_OFFSET;
67 break;
68 case 2: /* Host 2 port */
69 usbotg_base = usb_base + MXC_H2_OFFSET;
70 break;
71 default:
72 printk(KERN_ERR"%s no such port %d\n", __func__, port);
73 ret = -ENOENT;
74 goto error;
75 }
76 usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
77
78 switch (port) {
79 case 0: /*OTG port */
80 if (flags & MXC_EHCI_INTERNAL_PHY) {
81 v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
82
83 if (flags & MXC_EHCI_POWER_PINS_ENABLED) {
84 /* OC/USBPWR is not used */
85 v |= MXC_OTG_PHYCTRL_OC_DIS_BIT;
86 } else {
87 /* OC/USBPWR is used */
88 v &= ~MXC_OTG_PHYCTRL_OC_DIS_BIT;
89 }
90 __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
91
92 v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET);
93 if (flags & MXC_EHCI_WAKEUP_ENABLED)
94 v |= MXC_OTG_UCTRL_OWIE_BIT;/* OTG wakeup enable */
95 else
96 v &= ~MXC_OTG_UCTRL_OWIE_BIT;/* OTG wakeup disable */
97 if (flags & MXC_EHCI_POWER_PINS_ENABLED)
98 v |= MXC_OTG_UCTRL_OPM_BIT;
99 else
100 v &= ~MXC_OTG_UCTRL_OPM_BIT;
101 __raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET);
102 }
103 break;
104 case 1: /* Host 1 */
105 /*Host ULPI */
106 v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET);
107 if (flags & MXC_EHCI_WAKEUP_ENABLED) {
108 /* HOST1 wakeup/ULPI intr enable */
109 v |= (MXC_H1_UCTRL_H1WIE_BIT | MXC_H1_UCTRL_H1UIE_BIT);
110 } else {
111 /* HOST1 wakeup/ULPI intr disable */
112 v &= ~(MXC_H1_UCTRL_H1WIE_BIT | MXC_H1_UCTRL_H1UIE_BIT);
113 }
114
115 if (flags & MXC_EHCI_POWER_PINS_ENABLED)
116 v &= ~MXC_H1_UCTRL_H1PM_BIT; /* HOST1 power mask used*/
117 else
118 v |= MXC_H1_UCTRL_H1PM_BIT; /* HOST1 power mask used*/
119 __raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET);
120
121 v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
122 if (flags & MXC_EHCI_POWER_PINS_ENABLED)
123 v &= ~MXC_H1_OC_DIS_BIT; /* OC is used */
124 else
125 v |= MXC_H1_OC_DIS_BIT; /* OC is not used */
126 __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
127
128 v = __raw_readl(usbotg_base + MXC_USBCMD_OFFSET);
129 if (flags & MXC_EHCI_ITC_NO_THRESHOLD)
130 /* Interrupt Threshold Control:Immediate (no threshold) */
131 v &= MXC_UCMD_ITC_NO_THRESHOLD_MASK;
132 __raw_writel(v, usbotg_base + MXC_USBCMD_OFFSET);
133 break;
134 case 2: /* Host 2 ULPI */
135 v = __raw_readl(usbother_base + MXC_USBH2CTRL_OFFSET);
136 if (flags & MXC_EHCI_WAKEUP_ENABLED) {
137 /* HOST1 wakeup/ULPI intr enable */
138 v |= (MXC_H2_UCTRL_H2WIE_BIT | MXC_H2_UCTRL_H2UIE_BIT);
139 } else {
140 /* HOST1 wakeup/ULPI intr disable */
141 v &= ~(MXC_H2_UCTRL_H2WIE_BIT | MXC_H2_UCTRL_H2UIE_BIT);
142 }
143
144 if (flags & MXC_EHCI_POWER_PINS_ENABLED)
145 v &= ~MXC_H2_UCTRL_H2PM_BIT; /* HOST2 power mask used*/
146 else
147 v |= MXC_H2_UCTRL_H2PM_BIT; /* HOST2 power mask used*/
148 __raw_writel(v, usbother_base + MXC_USBH2CTRL_OFFSET);
149 break;
150 }
151
152error:
153 iounmap(usb_base);
154 return ret;
155}
156
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