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/*
* arch/arm/plat-omap/usb.c -- platform level USB initialization
*
* Copyright (C) 2004 Texas Instruments, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#undef DEBUG
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <plat/usb.h>
#include <plat/board.h>
#include <mach/hardware.h>
#ifdef CONFIG_ARCH_OMAP_OTG
void __init
omap_otg_init(struct omap_usb_config *config)
{
u32 syscon;
int alt_pingroup = 0;
/* NOTE: no bus or clock setup (yet?) */
syscon = omap_readl(OTG_SYSCON_1) & 0xffff;
if (!(syscon & OTG_RESET_DONE))
pr_debug("USB resets not complete?\n");
//omap_writew(0, OTG_IRQ_EN);
/* pin muxing and transceiver pinouts */
if (config->pins[0] > 2) /* alt pingroup 2 */
alt_pingroup = 1;
syscon |= config->usb0_init(config->pins[0], is_usb0_device(config));
syscon |= config->usb1_init(config->pins[1]);
syscon |= config->usb2_init(config->pins[2], alt_pingroup);
pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
omap_writel(syscon, OTG_SYSCON_1);
syscon = config->hmc_mode;
syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
#ifdef CONFIG_USB_OTG
if (config->otg)
syscon |= OTG_EN;
#endif
if (cpu_class_is_omap1())
pr_debug("USB_TRANSCEIVER_CTRL = %03x\n",
omap_readl(USB_TRANSCEIVER_CTRL));
pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2));
omap_writel(syscon, OTG_SYSCON_2);
printk("USB: hmc %d", config->hmc_mode);
if (!alt_pingroup)
printk(", usb2 alt %d wires", config->pins[2]);
else if (config->pins[0])
printk(", usb0 %d wires%s", config->pins[0],
is_usb0_device(config) ? " (dev)" : "");
if (config->pins[1])
printk(", usb1 %d wires", config->pins[1]);
if (!alt_pingroup && config->pins[2])
printk(", usb2 %d wires", config->pins[2]);
if (config->otg)
printk(", Mini-AB on usb%d", config->otg - 1);
printk("\n");
if (cpu_class_is_omap1()) {
u16 w;
/* leave USB clocks/controllers off until needed */
w = omap_readw(ULPD_SOFT_REQ);
w &= ~SOFT_USB_CLK_REQ;
omap_writew(w, ULPD_SOFT_REQ);
w = omap_readw(ULPD_CLOCK_CTRL);
w &= ~USB_MCLK_EN;
w |= DIS_USB_PVCI_CLK;
omap_writew(w, ULPD_CLOCK_CTRL);
}
syscon = omap_readl(OTG_SYSCON_1);
syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
#ifdef CONFIG_USB_GADGET_OMAP
if (config->otg || config->register_dev) {
struct platform_device *udc_device = config->udc_device;
int status;
syscon &= ~DEV_IDLE_EN;
udc_device->dev.platform_data = config;
status = platform_device_register(udc_device);
if (status)
pr_debug("can't register UDC device, %d\n", status);
}
#endif
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
if (config->otg || config->register_host) {
struct platform_device *ohci_device = config->ohci_device;
int status;
syscon &= ~HST_IDLE_EN;
ohci_device->dev.platform_data = config;
status = platform_device_register(ohci_device);
if (status)
pr_debug("can't register OHCI device, %d\n", status);
}
#endif
#ifdef CONFIG_USB_OTG
if (config->otg) {
struct platform_device *otg_device = config->otg_device;
int status;
syscon &= ~OTG_IDLE_EN;
otg_device->dev.platform_data = config;
status = platform_device_register(otg_device);
if (status)
pr_debug("can't register OTG device, %d\n", status);
}
#endif
pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
omap_writel(syscon, OTG_SYSCON_1);
}
#else
void omap_otg_init(struct omap_usb_config *config) {}
#endif
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