2 * arch/arm/plat-omap/usb.c -- platform level USB initialization
4 * Copyright (C) 2004 Texas Instruments, Inc.
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.
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.
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
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/init.h>
26 #include <linux/platform_device.h>
30 #include <plat/board.h>
32 #ifdef CONFIG_ARCH_OMAP_OTG
35 omap_otg_init(struct omap_usb_config *config)
41 /* NOTE: no bus or clock setup (yet?) */
43 syscon = omap_readl(OTG_SYSCON_1) & 0xffff;
44 if (!(syscon & OTG_RESET_DONE))
45 pr_debug("USB resets not complete?\n");
47 //omap_writew(0, OTG_IRQ_EN);
49 /* pin muxing and transceiver pinouts */
50 if (config->pins[0] > 2) /* alt pingroup 2 */
52 syscon |= config->usb0_init(config->pins[0], is_usb0_device(config));
53 syscon |= config->usb1_init(config->pins[1]);
54 syscon |= config->usb2_init(config->pins[2], alt_pingroup);
55 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
56 omap_writel(syscon, OTG_SYSCON_1);
58 syscon = config->hmc_mode;
59 syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
64 if (cpu_class_is_omap1())
65 pr_debug("USB_TRANSCEIVER_CTRL = %03x\n",
66 omap_readl(USB_TRANSCEIVER_CTRL));
67 pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2));
68 omap_writel(syscon, OTG_SYSCON_2);
70 printk("USB: hmc %d", config->hmc_mode);
72 printk(", usb2 alt %d wires", config->pins[2]);
73 else if (config->pins[0])
74 printk(", usb0 %d wires%s", config->pins[0],
75 is_usb0_device(config) ? " (dev)" : "");
77 printk(", usb1 %d wires", config->pins[1]);
78 if (!alt_pingroup && config->pins[2])
79 printk(", usb2 %d wires", config->pins[2]);
81 printk(", Mini-AB on usb%d", config->otg - 1);
84 if (cpu_class_is_omap1()) {
87 /* leave USB clocks/controllers off until needed */
88 w = omap_readw(ULPD_SOFT_REQ);
89 w &= ~SOFT_USB_CLK_REQ;
90 omap_writew(w, ULPD_SOFT_REQ);
92 w = omap_readw(ULPD_CLOCK_CTRL);
94 w |= DIS_USB_PVCI_CLK;
95 omap_writew(w, ULPD_CLOCK_CTRL);
97 syscon = omap_readl(OTG_SYSCON_1);
98 syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
100 #ifdef CONFIG_USB_GADGET_OMAP
101 if (config->otg || config->register_dev) {
102 struct platform_device *udc_device = config->udc_device;
104 syscon &= ~DEV_IDLE_EN;
105 udc_device->dev.platform_data = config;
106 status = platform_device_register(udc_device);
108 pr_debug("can't register UDC device, %d\n", status);
112 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
113 if (config->otg || config->register_host) {
114 struct platform_device *ohci_device = config->ohci_device;
116 syscon &= ~HST_IDLE_EN;
117 ohci_device->dev.platform_data = config;
118 status = platform_device_register(ohci_device);
120 pr_debug("can't register OHCI device, %d\n", status);
124 #ifdef CONFIG_USB_OTG
126 struct platform_device *otg_device = config->otg_device;
128 syscon &= ~OTG_IDLE_EN;
129 otg_device->dev.platform_data = config;
130 status = platform_device_register(otg_device);
132 pr_debug("can't register OTG device, %d\n", status);
135 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
136 omap_writel(syscon, OTG_SYSCON_1);
142 void omap_otg_init(struct omap_usb_config *config) {}