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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 | /* * arch/arm/plat-mxc/iomux-v1.c * * Copyright (C) 2004 Sascha Hauer, Synertronixx GmbH * Copyright (C) 2009 Uwe Kleine-Koenig, Pengutronix * * Common code for i.MX1, i.MX21 and i.MX27 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ #include <linux/errno.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/string.h> #include <linux/gpio.h> #include <asm/mach/map.h> #include "hardware.h" #include "iomux-v1.h" static void __iomem *imx_iomuxv1_baseaddr; static unsigned imx_iomuxv1_numports; static inline unsigned long imx_iomuxv1_readl(unsigned offset) { return __raw_readl(imx_iomuxv1_baseaddr + offset); } static inline void imx_iomuxv1_writel(unsigned long val, unsigned offset) { __raw_writel(val, imx_iomuxv1_baseaddr + offset); } static inline void imx_iomuxv1_rmwl(unsigned offset, unsigned long mask, unsigned long value) { unsigned long reg = imx_iomuxv1_readl(offset); reg &= ~mask; reg |= value; imx_iomuxv1_writel(reg, offset); } static inline void imx_iomuxv1_set_puen( unsigned int port, unsigned int pin, int on) { unsigned long mask = 1 << pin; imx_iomuxv1_rmwl(MXC_PUEN(port), mask, on ? mask : 0); } static inline void imx_iomuxv1_set_ddir( unsigned int port, unsigned int pin, int out) { unsigned long mask = 1 << pin; imx_iomuxv1_rmwl(MXC_DDIR(port), mask, out ? mask : 0); } static inline void imx_iomuxv1_set_gpr( unsigned int port, unsigned int pin, int af) { unsigned long mask = 1 << pin; imx_iomuxv1_rmwl(MXC_GPR(port), mask, af ? mask : 0); } static inline void imx_iomuxv1_set_gius( unsigned int port, unsigned int pin, int inuse) { unsigned long mask = 1 << pin; imx_iomuxv1_rmwl(MXC_GIUS(port), mask, inuse ? mask : 0); } static inline void imx_iomuxv1_set_ocr( unsigned int port, unsigned int pin, unsigned int ocr) { unsigned long shift = (pin & 0xf) << 1; unsigned long mask = 3 << shift; unsigned long value = ocr << shift; unsigned long offset = pin < 16 ? MXC_OCR1(port) : MXC_OCR2(port); imx_iomuxv1_rmwl(offset, mask, value); } static inline void imx_iomuxv1_set_iconfa( unsigned int port, unsigned int pin, unsigned int aout) { unsigned long shift = (pin & 0xf) << 1; unsigned long mask = 3 << shift; unsigned long value = aout << shift; unsigned long offset = pin < 16 ? MXC_ICONFA1(port) : MXC_ICONFA2(port); imx_iomuxv1_rmwl(offset, mask, value); } static inline void imx_iomuxv1_set_iconfb( unsigned int port, unsigned int pin, unsigned int bout) { unsigned long shift = (pin & 0xf) << 1; unsigned long mask = 3 << shift; unsigned long value = bout << shift; unsigned long offset = pin < 16 ? MXC_ICONFB1(port) : MXC_ICONFB2(port); imx_iomuxv1_rmwl(offset, mask, value); } int mxc_gpio_mode(int gpio_mode) { unsigned int pin = gpio_mode & GPIO_PIN_MASK; unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT; unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT; unsigned int aout = (gpio_mode >> GPIO_AOUT_SHIFT) & 3; unsigned int bout = (gpio_mode >> GPIO_BOUT_SHIFT) & 3; if (port >= imx_iomuxv1_numports) return -EINVAL; /* Pullup enable */ imx_iomuxv1_set_puen(port, pin, gpio_mode & GPIO_PUEN); /* Data direction */ imx_iomuxv1_set_ddir(port, pin, gpio_mode & GPIO_OUT); /* Primary / alternate function */ imx_iomuxv1_set_gpr(port, pin, gpio_mode & GPIO_AF); /* use as gpio? */ imx_iomuxv1_set_gius(port, pin, !(gpio_mode & (GPIO_PF | GPIO_AF))); imx_iomuxv1_set_ocr(port, pin, ocr); imx_iomuxv1_set_iconfa(port, pin, aout); imx_iomuxv1_set_iconfb(port, pin, bout); return 0; } static int imx_iomuxv1_setup_multiple(const int *list, unsigned count) { size_t i; int ret = 0; for (i = 0; i < count; ++i) { ret = mxc_gpio_mode(list[i]); if (ret) return ret; } return ret; } int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, const char *label) { int ret; ret = imx_iomuxv1_setup_multiple(pin_list, count); return ret; } int __init imx_iomuxv1_init(void __iomem *base, int numports) { imx_iomuxv1_baseaddr = base; imx_iomuxv1_numports = numports; return 0; } |