1/* 2 * drivers/usb/musb/ubi32_usb.c 3 * Ubicom32 usb controller driver. 4 * 5 * (C) Copyright 2009, Ubicom, Inc. 6 * Copyright (C) 2005-2006 by Texas Instruments 7 * 8 * Derived from the Texas Instruments Inventra Controller Driver for Linux. 9 * 10 * This file is part of the Ubicom32 Linux Kernel Port. 11 * 12 * The Ubicom32 Linux Kernel Port is free software: you can redistribute 13 * it and/or modify it under the terms of the GNU General Public License 14 * as published by the Free Software Foundation, either version 2 of the 15 * License, or (at your option) any later version. 16 * 17 * The Ubicom32 Linux Kernel Port is distributed in the hope that it 18 * will be useful, but WITHOUT ANY WARRANTY; without even the implied 19 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 20 * the GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with the Ubicom32 Linux Kernel Port. If not, 24 * see <http://www.gnu.org/licenses/>. 25 * 26 * Ubicom32 implementation derived from (with many thanks): 27 * arch/m68knommu 28 * arch/blackfin 29 * arch/parisc 30 */ 31#include <linux/module.h> 32#include <linux/kernel.h> 33#include <linux/sched.h> 34#include <linux/slab.h> 35#include <linux/init.h> 36#include <linux/list.h> 37#include <linux/clk.h> 38#include <linux/io.h> 39 40#include <asm/io.h> 41#include <asm/ip5000.h> 42#include "musb_core.h" 43 44void musb_platform_enable(struct musb *musb) 45{ 46} 47void musb_platform_disable(struct musb *musb) 48{ 49} 50 51int musb_platform_set_mode(struct musb *musb, u8 musb_mode) { 52 return 0; 53} 54 55static void ip5k_usb_hcd_vbus_power(struct musb *musb, int is_on, int sleeping) 56{ 57} 58 59static void ip5k_usb_hcd_set_vbus(struct musb *musb, int is_on) 60{ 61 u8 devctl; 62 /* HDRC controls CPEN, but beware current surges during device 63 * connect. They can trigger transient overcurrent conditions 64 * that must be ignored. 65 */ 66 67 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); 68 69 if (is_on) { 70 musb->is_active = 1; 71 musb->xceiv.default_a = 1; 72 musb->xceiv.state = OTG_STATE_A_WAIT_VRISE; 73 devctl |= MUSB_DEVCTL_SESSION; 74 75 MUSB_HST_MODE(musb); 76 } else { 77 musb->is_active = 0; 78 79 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and 80 * jumping right to B_IDLE... 81 */ 82 83 musb->xceiv.default_a = 0; 84 musb->xceiv.state = OTG_STATE_B_IDLE; 85 devctl &= ~MUSB_DEVCTL_SESSION; 86 87 MUSB_DEV_MODE(musb); 88 } 89 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); 90 91 DBG(1, "VBUS %s, devctl %02x " 92 /* otg %3x conf %08x prcm %08x */ "\n", 93 otg_state_string(musb), 94 musb_readb(musb->mregs, MUSB_DEVCTL)); 95} 96static int ip5k_usb_hcd_set_power(struct otg_transceiver *x, unsigned mA) 97{ 98 return 0; 99} 100 101static int musb_platform_resume(struct musb *musb); 102 103int __init musb_platform_init(struct musb *musb) 104{ 105 106#ifdef CONFIG_UBICOM32_V4 107 u32_t chip_id; 108 asm volatile ( 109 "move.4 %0, CHIP_ID \n\t" 110 : "=r" (chip_id) 111 ); 112 if (chip_id == 0x30001) { 113 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 30); 114 udelay(1); 115 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 31); 116 } else { 117 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 17); 118 udelay(1); 119 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 14); 120 } 121#endif 122 123 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_CFG)) |= ((1 << 14) | (1 <<15)); 124 125 /* The i-clk is AUTO gated. Hence there is no need 126 * to disable it until the driver is shutdown */ 127 128 clk_enable(musb->clock); 129 musb_platform_resume(musb); 130 131 ip5k_usb_hcd_vbus_power(musb, musb->board_mode == MUSB_HOST, 1); 132 133 if (is_host_enabled(musb)) 134 musb->board_set_vbus = ip5k_usb_hcd_set_vbus; 135 if (is_peripheral_enabled(musb)) 136 musb->xceiv.set_power = ip5k_usb_hcd_set_power; 137 138 return 0; 139} 140 141 142int musb_platform_suspend(struct musb *musb) 143{ 144 return 0; 145} 146int musb_platform_resume(struct musb *musb) 147{ 148 return 0; 149} 150 151int musb_platform_exit(struct musb *musb) 152{ 153 ip5k_usb_hcd_vbus_power(musb, 0 /*off*/, 1); 154 musb_platform_suspend(musb); 155 return 0; 156} 157