mirror of https://gitee.com/openkylin/linux.git
594 lines
14 KiB
C
594 lines
14 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/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/usb_otg.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#include <asm/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/arch/mux.h>
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#include <asm/arch/usb.h>
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#include <asm/arch/board.h>
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/* These routines should handle the standard chip-specific modes
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* for usb0/1/2 ports, covering basic mux and transceiver setup.
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*
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* Some board-*.c files will need to set up additional mux options,
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* like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
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*/
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/* TESTED ON:
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* - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
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* - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
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* - 5912 OSK UDC, with *nonstandard* A-to-A cable
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* - 1510 Innovator UDC with bundled usb0 cable
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* - 1510 Innovator OHCI with bundled usb1/usb2 cable
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* - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
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* - 1710 custom development board using alternate pin group
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* - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
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*/
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/*-------------------------------------------------------------------------*/
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#ifdef CONFIG_ARCH_OMAP_OTG
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static struct otg_transceiver *xceiv;
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/**
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* otg_get_transceiver - find the (single) OTG transceiver driver
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*
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* Returns the transceiver driver, after getting a refcount to it; or
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* null if there is no such transceiver. The caller is responsible for
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* releasing that count.
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*/
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struct otg_transceiver *otg_get_transceiver(void)
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{
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if (xceiv)
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get_device(xceiv->dev);
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return xceiv;
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}
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EXPORT_SYMBOL(otg_get_transceiver);
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int otg_set_transceiver(struct otg_transceiver *x)
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{
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if (xceiv && x)
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return -EBUSY;
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xceiv = x;
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return 0;
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}
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EXPORT_SYMBOL(otg_set_transceiver);
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#endif
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/*-------------------------------------------------------------------------*/
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static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
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{
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u32 syscon1 = 0;
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if (nwires == 0) {
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if (!cpu_is_omap15xx()) {
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/* pulldown D+/D- */
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USB_TRANSCEIVER_CTRL_REG &= ~(3 << 1);
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}
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return 0;
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}
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if (is_device)
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omap_cfg_reg(W4_USB_PUEN);
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/* internal transceiver */
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if (nwires == 2) {
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// omap_cfg_reg(P9_USB_DP);
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// omap_cfg_reg(R8_USB_DM);
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if (cpu_is_omap15xx()) {
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/* This works on 1510-Innovator */
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return 0;
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}
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/* NOTES:
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* - peripheral should configure VBUS detection!
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* - only peripherals may use the internal D+/D- pulldowns
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* - OTG support on this port not yet written
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*/
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USB_TRANSCEIVER_CTRL_REG &= ~(7 << 4);
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if (!is_device)
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USB_TRANSCEIVER_CTRL_REG |= (3 << 1);
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return 3 << 16;
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}
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/* alternate pin config, external transceiver */
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if (cpu_is_omap15xx()) {
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printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
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return 0;
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}
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omap_cfg_reg(V6_USB0_TXD);
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omap_cfg_reg(W9_USB0_TXEN);
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omap_cfg_reg(W5_USB0_SE0);
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/* NOTE: SPEED and SUSP aren't configured here */
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if (nwires != 3)
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omap_cfg_reg(Y5_USB0_RCV);
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if (nwires != 6)
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USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB2_UNI_R;
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switch (nwires) {
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case 3:
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syscon1 = 2;
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break;
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case 4:
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syscon1 = 1;
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break;
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case 6:
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syscon1 = 3;
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omap_cfg_reg(AA9_USB0_VP);
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omap_cfg_reg(R9_USB0_VM);
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USB_TRANSCEIVER_CTRL_REG |= CONF_USB2_UNI_R;
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break;
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default:
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printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
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0, nwires);
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}
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return syscon1 << 16;
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}
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static u32 __init omap_usb1_init(unsigned nwires)
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{
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u32 syscon1 = 0;
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if (nwires != 6 && !cpu_is_omap15xx())
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USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB1_UNI_R;
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if (nwires == 0)
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return 0;
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/* external transceiver */
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omap_cfg_reg(USB1_TXD);
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omap_cfg_reg(USB1_TXEN);
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if (cpu_is_omap15xx()) {
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omap_cfg_reg(USB1_SEO);
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omap_cfg_reg(USB1_SPEED);
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// SUSP
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} else if (cpu_is_omap1610() || cpu_is_omap5912()) {
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omap_cfg_reg(W13_1610_USB1_SE0);
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omap_cfg_reg(R13_1610_USB1_SPEED);
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// SUSP
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} else if (cpu_is_omap1710()) {
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omap_cfg_reg(R13_1710_USB1_SE0);
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// SUSP
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} else {
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pr_debug("usb unrecognized\n");
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}
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if (nwires != 3)
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omap_cfg_reg(USB1_RCV);
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switch (nwires) {
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case 3:
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syscon1 = 2;
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break;
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case 4:
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syscon1 = 1;
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break;
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case 6:
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syscon1 = 3;
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omap_cfg_reg(USB1_VP);
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omap_cfg_reg(USB1_VM);
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if (!cpu_is_omap15xx())
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USB_TRANSCEIVER_CTRL_REG |= CONF_USB1_UNI_R;
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break;
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default:
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printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
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1, nwires);
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}
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return syscon1 << 20;
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}
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static u32 __init omap_usb2_init(unsigned nwires, unsigned alt_pingroup)
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{
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u32 syscon1 = 0;
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/* NOTE erratum: must leave USB2_UNI_R set if usb0 in use */
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if (alt_pingroup || nwires == 0)
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return 0;
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if (nwires != 6 && !cpu_is_omap15xx())
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USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB2_UNI_R;
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/* external transceiver */
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if (cpu_is_omap15xx()) {
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omap_cfg_reg(USB2_TXD);
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omap_cfg_reg(USB2_TXEN);
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omap_cfg_reg(USB2_SEO);
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if (nwires != 3)
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omap_cfg_reg(USB2_RCV);
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/* there is no USB2_SPEED */
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} else if (cpu_is_omap16xx()) {
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omap_cfg_reg(V6_USB2_TXD);
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omap_cfg_reg(W9_USB2_TXEN);
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omap_cfg_reg(W5_USB2_SE0);
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if (nwires != 3)
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omap_cfg_reg(Y5_USB2_RCV);
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// FIXME omap_cfg_reg(USB2_SPEED);
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} else {
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pr_debug("usb unrecognized\n");
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}
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// omap_cfg_reg(USB2_SUSP);
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switch (nwires) {
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case 3:
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syscon1 = 2;
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break;
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case 4:
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syscon1 = 1;
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break;
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case 6:
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syscon1 = 3;
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if (cpu_is_omap15xx()) {
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omap_cfg_reg(USB2_VP);
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omap_cfg_reg(USB2_VM);
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} else {
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omap_cfg_reg(AA9_USB2_VP);
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omap_cfg_reg(R9_USB2_VM);
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USB_TRANSCEIVER_CTRL_REG |= CONF_USB2_UNI_R;
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}
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break;
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default:
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printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
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2, nwires);
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}
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return syscon1 << 24;
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}
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/*-------------------------------------------------------------------------*/
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#if defined(CONFIG_USB_GADGET_OMAP) || \
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defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) || \
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(defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG))
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static void usb_release(struct device *dev)
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{
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/* normally not freed */
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}
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#endif
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#ifdef CONFIG_USB_GADGET_OMAP
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static struct resource udc_resources[] = {
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/* order is significant! */
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{ /* registers */
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.start = UDC_BASE,
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.end = UDC_BASE + 0xff,
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.flags = IORESOURCE_MEM,
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}, { /* general IRQ */
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.start = IH2_BASE + 20,
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.flags = IORESOURCE_IRQ,
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}, { /* PIO IRQ */
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.start = IH2_BASE + 30,
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.flags = IORESOURCE_IRQ,
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}, { /* SOF IRQ */
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.start = IH2_BASE + 29,
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.flags = IORESOURCE_IRQ,
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},
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};
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static u64 udc_dmamask = ~(u32)0;
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static struct platform_device udc_device = {
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.name = "omap_udc",
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.id = -1,
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.dev = {
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.release = usb_release,
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.dma_mask = &udc_dmamask,
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.coherent_dma_mask = 0xffffffff,
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},
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.num_resources = ARRAY_SIZE(udc_resources),
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.resource = udc_resources,
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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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/* The dmamask must be set for OHCI to work */
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static u64 ohci_dmamask = ~(u32)0;
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static struct resource ohci_resources[] = {
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{
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.start = OMAP_OHCI_BASE,
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.end = OMAP_OHCI_BASE + 4096 - 1,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = INT_USB_HHC_1,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device ohci_device = {
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.name = "ohci",
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.id = -1,
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.dev = {
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.release = usb_release,
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.dma_mask = &ohci_dmamask,
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.coherent_dma_mask = 0xffffffff,
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},
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.num_resources = ARRAY_SIZE(ohci_resources),
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.resource = ohci_resources,
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};
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#endif
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#if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
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static struct resource otg_resources[] = {
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/* order is significant! */
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{
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.start = OTG_BASE,
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.end = OTG_BASE + 0xff,
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.flags = IORESOURCE_MEM,
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}, {
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.start = IH2_BASE + 8,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device otg_device = {
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.name = "omap_otg",
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.id = -1,
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.dev = {
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.release = usb_release,
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},
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.num_resources = ARRAY_SIZE(otg_resources),
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.resource = otg_resources,
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};
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#endif
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/*-------------------------------------------------------------------------*/
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#define ULPD_CLOCK_CTRL_REG __REG16(ULPD_CLOCK_CTRL)
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#define ULPD_SOFT_REQ_REG __REG16(ULPD_SOFT_REQ)
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// FIXME correct answer depends on hmc_mode,
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// as does any nonzero value for config->otg port number
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#ifdef CONFIG_USB_GADGET_OMAP
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#define is_usb0_device(config) 1
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#else
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#define is_usb0_device(config) 0
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#endif
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/*-------------------------------------------------------------------------*/
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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 = OTG_SYSCON_1_REG & 0xffff;
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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 = OTG_SYSCON_1_REG & 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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// OTG_IRQ_EN_REG = 0;
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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 |= omap_usb0_init(config->pins[0], is_usb0_device(config));
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syscon |= omap_usb1_init(config->pins[1]);
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syscon |= omap_usb2_init(config->pins[2], alt_pingroup);
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pr_debug("OTG_SYSCON_1_REG = %08x\n", syscon);
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OTG_SYSCON_1_REG = syscon;
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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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pr_debug("USB_TRANSCEIVER_CTRL_REG = %03x\n", USB_TRANSCEIVER_CTRL_REG);
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pr_debug("OTG_SYSCON_2_REG = %08x\n", syscon);
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OTG_SYSCON_2_REG = syscon;
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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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/* leave USB clocks/controllers off until needed */
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ULPD_SOFT_REQ_REG &= ~SOFT_USB_CLK_REQ;
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ULPD_CLOCK_CTRL_REG &= ~USB_MCLK_EN;
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ULPD_CLOCK_CTRL_REG |= DIS_USB_PVCI_CLK;
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syscon = OTG_SYSCON_1_REG;
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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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syscon &= ~DEV_IDLE_EN;
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udc_device.dev.platform_data = config;
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/* FIXME patch IRQ numbers for omap730 */
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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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syscon &= ~HST_IDLE_EN;
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ohci_device.dev.platform_data = config;
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if (cpu_is_omap730())
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ohci_resources[1].start = INT_730_USB_HHC_1;
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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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syscon &= ~OTG_IDLE_EN;
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otg_device.dev.platform_data = config;
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if (cpu_is_omap730())
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otg_resources[1].start = INT_730_USB_OTG;
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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_REG = %08x\n", syscon);
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OTG_SYSCON_1_REG = syscon;
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status = 0;
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}
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#else
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static inline void omap_otg_init(struct omap_usb_config *config) {}
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#endif
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/*-------------------------------------------------------------------------*/
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#ifdef CONFIG_ARCH_OMAP1510
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#define ULPD_DPLL_CTRL_REG __REG16(ULPD_DPLL_CTRL)
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#define DPLL_IOB (1 << 13)
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#define DPLL_PLL_ENABLE (1 << 4)
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#define DPLL_LOCK (1 << 0)
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#define ULPD_APLL_CTRL_REG __REG16(ULPD_APLL_CTRL)
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#define APLL_NDPLL_SWITCH (1 << 0)
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static void __init omap_1510_usb_init(struct omap_usb_config *config)
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{
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int status;
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unsigned int val;
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omap_usb0_init(config->pins[0], is_usb0_device(config));
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omap_usb1_init(config->pins[1]);
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omap_usb2_init(config->pins[2], 0);
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val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
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val |= (config->hmc_mode << 1);
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omap_writel(val, MOD_CONF_CTRL_0);
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printk("USB: hmc %d", config->hmc_mode);
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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 (config->pins[2])
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printk(", usb2 %d wires", config->pins[2]);
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printk("\n");
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/* use DPLL for 48 MHz function clock */
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pr_debug("APLL %04x DPLL %04x REQ %04x\n", ULPD_APLL_CTRL_REG,
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ULPD_DPLL_CTRL_REG, ULPD_SOFT_REQ_REG);
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ULPD_APLL_CTRL_REG &= ~APLL_NDPLL_SWITCH;
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ULPD_DPLL_CTRL_REG |= DPLL_IOB | DPLL_PLL_ENABLE;
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ULPD_SOFT_REQ_REG |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
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while (!(ULPD_DPLL_CTRL_REG & DPLL_LOCK))
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cpu_relax();
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#ifdef CONFIG_USB_GADGET_OMAP
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if (config->register_dev) {
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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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/* udc driver gates 48MHz by D+ pullup */
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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->register_host) {
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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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/* hcd explicitly gates 48MHz */
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}
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#endif
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}
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#else
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static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
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#endif
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/*-------------------------------------------------------------------------*/
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static struct omap_usb_config platform_data;
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static int __init
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omap_usb_init(void)
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{
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const struct omap_usb_config *config;
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config = omap_get_config(OMAP_TAG_USB, struct omap_usb_config);
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if (config == NULL) {
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printk(KERN_ERR "USB: No board-specific "
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"platform config found\n");
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return -ENODEV;
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}
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platform_data = *config;
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if (cpu_is_omap730() || cpu_is_omap16xx())
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omap_otg_init(&platform_data);
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else if (cpu_is_omap15xx())
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omap_1510_usb_init(&platform_data);
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else {
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printk(KERN_ERR "USB: No init for your chip yet\n");
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return -ENODEV;
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}
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return 0;
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}
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subsys_initcall(omap_usb_init);
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