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