/* * Copyright (c) 2008, Google Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #define GPIO1_REG(off) (MSM_GPIO1_BASE + 0x800 + (off)) #define GPIO2_REG(off) (MSM_GPIO2_BASE + 0xC00 + (off)) /* output value */ #define GPIO_OUT_0 GPIO1_REG(0x00) /* gpio 15-0 */ #define GPIO_OUT_1 GPIO2_REG(0x00) /* gpio 42-16 */ #define GPIO_OUT_2 GPIO1_REG(0x04) /* gpio 67-43 */ #define GPIO_OUT_3 GPIO1_REG(0x08) /* gpio 94-68 */ #define GPIO_OUT_4 GPIO1_REG(0x0C) /* gpio 106-95 */ /* same pin map as above, output enable */ #define GPIO_OE_0 GPIO1_REG(0x10) #define GPIO_OE_1 GPIO2_REG(0x08) #define GPIO_OE_2 GPIO1_REG(0x14) #define GPIO_OE_3 GPIO1_REG(0x18) #define GPIO_OE_4 GPIO1_REG(0x1C) /* same pin map as above, input read */ #define GPIO_IN_0 GPIO1_REG(0x34) #define GPIO_IN_1 GPIO2_REG(0x20) #define GPIO_IN_2 GPIO1_REG(0x38) #define GPIO_IN_3 GPIO1_REG(0x3C) #define GPIO_IN_4 GPIO1_REG(0x40) /* same pin map as above, 1=edge 0=level interrup */ #define GPIO_INT_EDGE_0 GPIO1_REG(0x60) #define GPIO_INT_EDGE_1 GPIO2_REG(0x50) #define GPIO_INT_EDGE_2 GPIO1_REG(0x64) #define GPIO_INT_EDGE_3 GPIO1_REG(0x68) #define GPIO_INT_EDGE_4 GPIO1_REG(0x6C) /* same pin map as above, 1=positive 0=negative */ #define GPIO_INT_POS_0 GPIO1_REG(0x70) #define GPIO_INT_POS_1 GPIO2_REG(0x58) #define GPIO_INT_POS_2 GPIO1_REG(0x74) #define GPIO_INT_POS_3 GPIO1_REG(0x78) #define GPIO_INT_POS_4 GPIO1_REG(0x7C) /* same pin map as above, interrupt enable */ #define GPIO_INT_EN_0 GPIO1_REG(0x80) #define GPIO_INT_EN_1 GPIO2_REG(0x60) #define GPIO_INT_EN_2 GPIO1_REG(0x84) #define GPIO_INT_EN_3 GPIO1_REG(0x88) #define GPIO_INT_EN_4 GPIO1_REG(0x8C) /* same pin map as above, write 1 to clear interrupt */ #define GPIO_INT_CLEAR_0 GPIO1_REG(0x90) #define GPIO_INT_CLEAR_1 GPIO2_REG(0x68) #define GPIO_INT_CLEAR_2 GPIO1_REG(0x94) #define GPIO_INT_CLEAR_3 GPIO1_REG(0x98) #define GPIO_INT_CLEAR_4 GPIO1_REG(0x9C) /* same pin map as above, 1=interrupt pending */ #define GPIO_INT_STATUS_0 GPIO1_REG(0xA0) #define GPIO_INT_STATUS_1 GPIO2_REG(0x70) #define GPIO_INT_STATUS_2 GPIO1_REG(0xA4) #define GPIO_INT_STATUS_3 GPIO1_REG(0xA8) #define GPIO_INT_STATUS_4 GPIO1_REG(0xAC) typedef struct gpioregs gpioregs; struct gpioregs { unsigned out; unsigned in; unsigned int_status; unsigned int_clear; unsigned int_en; unsigned int_edge; unsigned int_pos; unsigned oe; }; static gpioregs GPIO_REGS[] = { { .out = GPIO_OUT_0, .in = GPIO_IN_0, .int_status = GPIO_INT_STATUS_0, .int_clear = GPIO_INT_CLEAR_0, .int_en = GPIO_INT_EN_0, .int_edge = GPIO_INT_EDGE_0, .int_pos = GPIO_INT_POS_0, .oe = GPIO_OE_0, }, { .out = GPIO_OUT_1, .in = GPIO_IN_1, .int_status = GPIO_INT_STATUS_1, .int_clear = GPIO_INT_CLEAR_1, .int_en = GPIO_INT_EN_1, .int_edge = GPIO_INT_EDGE_1, .int_pos = GPIO_INT_POS_1, .oe = GPIO_OE_1, }, { .out = GPIO_OUT_2, .in = GPIO_IN_2, .int_status = GPIO_INT_STATUS_2, .int_clear = GPIO_INT_CLEAR_2, .int_en = GPIO_INT_EN_2, .int_edge = GPIO_INT_EDGE_2, .int_pos = GPIO_INT_POS_2, .oe = GPIO_OE_2, }, { .out = GPIO_OUT_3, .in = GPIO_IN_3, .int_status = GPIO_INT_STATUS_3, .int_clear = GPIO_INT_CLEAR_3, .int_en = GPIO_INT_EN_3, .int_edge = GPIO_INT_EDGE_3, .int_pos = GPIO_INT_POS_3, .oe = GPIO_OE_3, }, { .out = GPIO_OUT_4, .in = GPIO_IN_4, .int_status = GPIO_INT_STATUS_4, .int_clear = GPIO_INT_CLEAR_4, .int_en = GPIO_INT_EN_4, .int_edge = GPIO_INT_EDGE_4, .int_pos = GPIO_INT_POS_4, .oe = GPIO_OE_4, }, }; static gpioregs *find_gpio(unsigned n, unsigned *bit) { if(n > 106) return 0; if(n > 94) { *bit = 1 << (n - 95); return GPIO_REGS + 4; } if(n > 67) { *bit = 1 << (n - 68); return GPIO_REGS + 3; } if(n > 42) { *bit = 1 << (n - 43); return GPIO_REGS + 2; } if(n > 15) { *bit = 1 << (n - 16); return GPIO_REGS + 1; } *bit = 1 << n; return GPIO_REGS + 0; } int gpio_config(unsigned n, unsigned flags) { gpioregs *r; unsigned b; unsigned v; if ((r = find_gpio(n, &b)) == 0) return -1; v = readl(r->oe); if (flags & GPIO_OUTPUT) { writel(v | b, r->oe); } else { writel(v & (~b), r->oe); } return 0; } void gpio_set(unsigned n, unsigned on) { gpioregs *r; unsigned b; unsigned v; if((r = find_gpio(n, &b)) == 0) return; v = readl(r->out); if(on) { writel(v | b, r->out); } else { writel(v & (~b), r->out); } } int gpio_get(unsigned n) { gpioregs *r; unsigned b; if((r = find_gpio(n, &b)) == 0) return 0; return (readl(r->in) & b) ? 1 : 0; }