2 * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 #include <asm/arch/imx-regs.h>
26 #include <asm/arch/mx35_pins.h>
27 #include <asm/arch/iomux.h>
30 * IOMUX register (base) addresses
33 IOMUXGPR = IOMUXC_BASE_ADDR, /* General purpose */
34 IOMUXSW_MUX_CTL = IOMUXC_BASE_ADDR + 4, /* MUX control */
35 IOMUXSW_MUX_END = IOMUXC_BASE_ADDR + 0x324, /* last MUX control */
36 IOMUXSW_PAD_CTL = IOMUXC_BASE_ADDR + 0x328, /* Pad control */
37 IOMUXSW_PAD_END = IOMUXC_BASE_ADDR + 0x794, /* last Pad control */
38 IOMUXSW_INPUT_CTL = IOMUXC_BASE_ADDR + 0x7AC, /* input select */
39 IOMUXSW_INPUT_END = IOMUXC_BASE_ADDR + 0x9F4, /* last input select */
42 #define MUX_PIN_NUM_MAX \
43 (((IOMUXSW_PAD_END - IOMUXSW_PAD_CTL) >> 2) + 1)
44 #define MUX_INPUT_NUM_MUX \
45 (((IOMUXSW_INPUT_END - IOMUXSW_INPUT_CTL) >> 2) + 1)
47 #define PIN_TO_IOMUX_INDEX(pin) ((PIN_TO_IOMUX_PAD(pin) - 0x328) >> 2)
50 * Request ownership for an IO pin. This function has to be the first one
51 * being called before that pin is used.
53 void mxc_request_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t cfg)
55 u32 mux_reg = PIN_TO_IOMUX_MUX(pin);
57 if (mux_reg != NON_MUX_I) {
64 * Release ownership for an IO pin
66 void mxc_free_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t cfg)
71 * This function configures the pad value for a IOMUX pin.
73 * @param pin a pin number as defined in iomux_pin_name_t
74 * @param config the ORed value of elements defined in iomux_pad_config_t
76 void mxc_iomux_set_pad(iomux_pin_name_t pin, u32 config)
78 u32 pad_reg = IOMUXGPR + PIN_TO_IOMUX_PAD(pin);
80 writel(config, pad_reg);
84 * This function enables/disables the general purpose function for a particular
87 * @param gp one signal as defined in iomux_gp_func_t
88 * @param en enable/disable
90 void mxc_iomux_set_gpr(iomux_gp_func_t gp, int en)
104 * This function configures input path.
106 * @param input index of input select register as defined in
107 * iomux_input_select_t
108 * @param config the binary value of elements defined in
109 * iomux_input_config_t
111 void mxc_iomux_set_input(iomux_input_select_t input, u32 config)
113 u32 reg = IOMUXSW_INPUT_CTL + (input << 2);