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