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-rw-r--r--arch/arm/mach-mxc91231/iomux.c177
1 files changed, 0 insertions, 177 deletions
diff --git a/arch/arm/mach-mxc91231/iomux.c b/arch/arm/mach-mxc91231/iomux.c
deleted file mode 100644
index 66fc41cbf2ca..000000000000
--- a/arch/arm/mach-mxc91231/iomux.c
+++ /dev/null
@@ -1,177 +0,0 @@
1/*
2 * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
3 * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
4 * Copyright (C) 2009 by Valentin Longchamp <valentin.longchamp@epfl.ch>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
18 * MA 02110-1301, USA.
19 */
20
21#include <linux/module.h>
22#include <linux/spinlock.h>
23#include <linux/io.h>
24#include <linux/kernel.h>
25#include <mach/hardware.h>
26#include <mach/gpio.h>
27#include <mach/iomux-mxc91231.h>
28
29/*
30 * IOMUX register (base) addresses
31 */
32#define IOMUX_AP_BASE MXC91231_IO_ADDRESS(MXC91231_IOMUX_AP_BASE_ADDR)
33#define IOMUX_COM_BASE MXC91231_IO_ADDRESS(MXC91231_IOMUX_COM_BASE_ADDR)
34#define IOMUXSW_AP_MUX_CTL (IOMUX_AP_BASE + 0x000)
35#define IOMUXSW_SP_MUX_CTL (IOMUX_COM_BASE + 0x000)
36#define IOMUXSW_PAD_CTL (IOMUX_COM_BASE + 0x200)
37
38#define IOMUXINT_OBS1 (IOMUX_AP_BASE + 0x600)
39#define IOMUXINT_OBS2 (IOMUX_AP_BASE + 0x004)
40
41static DEFINE_SPINLOCK(gpio_mux_lock);
42
43#define NB_PORTS ((PIN_MAX + 32) / 32)
44#define PIN_GLOBAL_NUM(pin) \
45 (((pin & MUX_SIDE_MASK) >> MUX_SIDE_SHIFT)*PIN_AP_MAX + \
46 ((pin & MUX_REG_MASK) >> MUX_REG_SHIFT)*4 + \
47 ((pin & MUX_FIELD_MASK) >> MUX_FIELD_SHIFT))
48
49unsigned long mxc_pin_alloc_map[NB_PORTS * 32 / BITS_PER_LONG];
50/*
51 * set the mode for a IOMUX pin.
52 */
53int mxc_iomux_mode(unsigned int pin_mode)
54{
55 u32 side, field, l, mode, ret = 0;
56 void __iomem *reg;
57
58 side = (pin_mode & MUX_SIDE_MASK) >> MUX_SIDE_SHIFT;
59 switch (side) {
60 case MUX_SIDE_AP:
61 reg = IOMUXSW_AP_MUX_CTL;
62 break;
63 case MUX_SIDE_SP:
64 reg = IOMUXSW_SP_MUX_CTL;
65 break;
66 default:
67 return -EINVAL;
68 }
69 reg += ((pin_mode & MUX_REG_MASK) >> MUX_REG_SHIFT) * 4;
70 field = (pin_mode & MUX_FIELD_MASK) >> MUX_FIELD_SHIFT;
71 mode = (pin_mode & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
72
73 spin_lock(&gpio_mux_lock);
74
75 l = __raw_readl(reg);
76 l &= ~(0xff << (field * 8));
77 l |= mode << (field * 8);
78 __raw_writel(l, reg);
79
80 spin_unlock(&gpio_mux_lock);
81
82 return ret;
83}
84EXPORT_SYMBOL(mxc_iomux_mode);
85
86/*
87 * This function configures the pad value for a IOMUX pin.
88 */
89void mxc_iomux_set_pad(enum iomux_pins pin, u32 config)
90{
91 u32 padgrp, field, l;
92 void __iomem *reg;
93
94 padgrp = (pin & MUX_PADGRP_MASK) >> MUX_PADGRP_SHIFT;
95 reg = IOMUXSW_PAD_CTL + (pin + 2) / 3 * 4;
96 field = (pin + 2) % 3;
97
98 pr_debug("%s: reg offset = 0x%x, field = %d\n",
99 __func__, (pin + 2) / 3, field);
100
101 spin_lock(&gpio_mux_lock);
102
103 l = __raw_readl(reg);
104 l &= ~(0x1ff << (field * 10));
105 l |= config << (field * 10);
106 __raw_writel(l, reg);
107
108 spin_unlock(&gpio_mux_lock);
109}
110EXPORT_SYMBOL(mxc_iomux_set_pad);
111
112/*
113 * allocs a single pin:
114 * - reserves the pin so that it is not claimed by another driver
115 * - setups the iomux according to the configuration
116 */
117int mxc_iomux_alloc_pin(unsigned int pin_mode, const char *label)
118{
119 unsigned pad = PIN_GLOBAL_NUM(pin_mode);
120 if (pad >= (PIN_MAX + 1)) {
121 printk(KERN_ERR "mxc_iomux: Attempt to request nonexistant pin %u for \"%s\"\n",
122 pad, label ? label : "?");
123 return -EINVAL;
124 }
125
126 if (test_and_set_bit(pad, mxc_pin_alloc_map)) {
127 printk(KERN_ERR "mxc_iomux: pin %u already used. Allocation for \"%s\" failed\n",
128 pad, label ? label : "?");
129 return -EBUSY;
130 }
131 mxc_iomux_mode(pin_mode);
132
133 return 0;
134}
135EXPORT_SYMBOL(mxc_iomux_alloc_pin);
136
137int mxc_iomux_setup_multiple_pins(const unsigned int *pin_list, unsigned count,
138 const char *label)
139{
140 const unsigned int *p = pin_list;
141 int i;
142 int ret = -EINVAL;
143
144 for (i = 0; i < count; i++) {
145 ret = mxc_iomux_alloc_pin(*p, label);
146 if (ret)
147 goto setup_error;
148 p++;
149 }
150 return 0;
151
152setup_error:
153 mxc_iomux_release_multiple_pins(pin_list, i);
154 return ret;
155}
156EXPORT_SYMBOL(mxc_iomux_setup_multiple_pins);
157
158void mxc_iomux_release_pin(unsigned int pin_mode)
159{
160 unsigned pad = PIN_GLOBAL_NUM(pin_mode);
161
162 if (pad < (PIN_MAX + 1))
163 clear_bit(pad, mxc_pin_alloc_map);
164}
165EXPORT_SYMBOL(mxc_iomux_release_pin);
166
167void mxc_iomux_release_multiple_pins(const unsigned int *pin_list, int count)
168{
169 const unsigned int *p = pin_list;
170 int i;
171
172 for (i = 0; i < count; i++) {
173 mxc_iomux_release_pin(*p);
174 p++;
175 }
176}
177EXPORT_SYMBOL(mxc_iomux_release_multiple_pins);