diff options
Diffstat (limited to 'arch/arm/mach-mxc91231/iomux.c')
-rw-r--r-- | arch/arm/mach-mxc91231/iomux.c | 177 |
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 | |||
41 | static 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 | |||
49 | unsigned long mxc_pin_alloc_map[NB_PORTS * 32 / BITS_PER_LONG]; | ||
50 | /* | ||
51 | * set the mode for a IOMUX pin. | ||
52 | */ | ||
53 | int 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 | } | ||
84 | EXPORT_SYMBOL(mxc_iomux_mode); | ||
85 | |||
86 | /* | ||
87 | * This function configures the pad value for a IOMUX pin. | ||
88 | */ | ||
89 | void 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 | } | ||
110 | EXPORT_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 | */ | ||
117 | int 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 | } | ||
135 | EXPORT_SYMBOL(mxc_iomux_alloc_pin); | ||
136 | |||
137 | int 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 | |||
152 | setup_error: | ||
153 | mxc_iomux_release_multiple_pins(pin_list, i); | ||
154 | return ret; | ||
155 | } | ||
156 | EXPORT_SYMBOL(mxc_iomux_setup_multiple_pins); | ||
157 | |||
158 | void 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 | } | ||
165 | EXPORT_SYMBOL(mxc_iomux_release_pin); | ||
166 | |||
167 | void 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 | } | ||
177 | EXPORT_SYMBOL(mxc_iomux_release_multiple_pins); | ||