1 /*
2 * arch/arm/plat-omap/usb.c -- platform level USB initialization
3 *
4 * Copyright (C) 2004 Texas Instruments, Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #undef DEBUG
22
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/init.h>
26 #include <linux/platform_device.h>
27 #include <linux/io.h>
28
29 #include <plat/usb.h>
30 #include <plat/board.h>
31
32 #include <mach/hardware.h>
33
34 #include "../mach-omap2/common.h"
35
36 #ifdef CONFIG_ARCH_OMAP_OTG
37
38 void __init
omap_otg_init(struct omap_usb_config * config)39 omap_otg_init(struct omap_usb_config *config)
40 {
41 u32 syscon;
42 int status;
43 int alt_pingroup = 0;
44
45 /* NOTE: no bus or clock setup (yet?) */
46
47 syscon = omap_readl(OTG_SYSCON_1) & 0xffff;
48 if (!(syscon & OTG_RESET_DONE))
49 pr_debug("USB resets not complete?\n");
50
51 //omap_writew(0, OTG_IRQ_EN);
52
53 /* pin muxing and transceiver pinouts */
54 if (config->pins[0] > 2) /* alt pingroup 2 */
55 alt_pingroup = 1;
56 syscon |= config->usb0_init(config->pins[0], is_usb0_device(config));
57 syscon |= config->usb1_init(config->pins[1]);
58 syscon |= config->usb2_init(config->pins[2], alt_pingroup);
59 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
60 omap_writel(syscon, OTG_SYSCON_1);
61
62 syscon = config->hmc_mode;
63 syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
64 #ifdef CONFIG_USB_OTG
65 if (config->otg)
66 syscon |= OTG_EN;
67 #endif
68 if (cpu_class_is_omap1())
69 pr_debug("USB_TRANSCEIVER_CTRL = %03x\n",
70 omap_readl(USB_TRANSCEIVER_CTRL));
71 pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2));
72 omap_writel(syscon, OTG_SYSCON_2);
73
74 printk("USB: hmc %d", config->hmc_mode);
75 if (!alt_pingroup)
76 printk(", usb2 alt %d wires", config->pins[2]);
77 else if (config->pins[0])
78 printk(", usb0 %d wires%s", config->pins[0],
79 is_usb0_device(config) ? " (dev)" : "");
80 if (config->pins[1])
81 printk(", usb1 %d wires", config->pins[1]);
82 if (!alt_pingroup && config->pins[2])
83 printk(", usb2 %d wires", config->pins[2]);
84 if (config->otg)
85 printk(", Mini-AB on usb%d", config->otg - 1);
86 printk("\n");
87
88 if (cpu_class_is_omap1()) {
89 u16 w;
90
91 /* leave USB clocks/controllers off until needed */
92 w = omap_readw(ULPD_SOFT_REQ);
93 w &= ~SOFT_USB_CLK_REQ;
94 omap_writew(w, ULPD_SOFT_REQ);
95
96 w = omap_readw(ULPD_CLOCK_CTRL);
97 w &= ~USB_MCLK_EN;
98 w |= DIS_USB_PVCI_CLK;
99 omap_writew(w, ULPD_CLOCK_CTRL);
100 }
101 syscon = omap_readl(OTG_SYSCON_1);
102 syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
103
104 #ifdef CONFIG_USB_GADGET_OMAP
105 if (config->otg || config->register_dev) {
106 struct platform_device *udc_device = config->udc_device;
107
108 syscon &= ~DEV_IDLE_EN;
109 udc_device->dev.platform_data = config;
110 status = platform_device_register(udc_device);
111 if (status)
112 pr_debug("can't register UDC device, %d\n", status);
113 }
114 #endif
115
116 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
117 if (config->otg || config->register_host) {
118 struct platform_device *ohci_device = config->ohci_device;
119
120 syscon &= ~HST_IDLE_EN;
121 ohci_device->dev.platform_data = config;
122 status = platform_device_register(ohci_device);
123 if (status)
124 pr_debug("can't register OHCI device, %d\n", status);
125 }
126 #endif
127
128 #ifdef CONFIG_USB_OTG
129 if (config->otg) {
130 struct platform_device *otg_device = config->otg_device;
131
132 syscon &= ~OTG_IDLE_EN;
133 otg_device->dev.platform_data = config;
134 status = platform_device_register(otg_device);
135 if (status)
136 pr_debug("can't register OTG device, %d\n", status);
137 }
138 #endif
139 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
140 omap_writel(syscon, OTG_SYSCON_1);
141
142 status = 0;
143 }
144
145 #else
omap_otg_init(struct omap_usb_config * config)146 void omap_otg_init(struct omap_usb_config *config) {}
147 #endif
148