| /* |
| * 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 <debug.h> |
| #include <reg.h> |
| #include <platform/iomap.h> |
| #include <dev/gpio.h> |
| |
| #include "gpio_hw.h" |
| |
| 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, |
| }, |
| { |
| .out = GPIO_OUT_5, |
| .in = GPIO_IN_5, |
| .int_status = GPIO_INT_STATUS_5, |
| .int_clear = GPIO_INT_CLEAR_5, |
| .int_en = GPIO_INT_EN_5, |
| .int_edge = GPIO_INT_EDGE_5, |
| .int_pos = GPIO_INT_POS_5, |
| .oe = GPIO_OE_5, |
| }, |
| { |
| .out = GPIO_OUT_6, |
| .in = GPIO_IN_6, |
| .int_status = GPIO_INT_STATUS_6, |
| .int_clear = GPIO_INT_CLEAR_6, |
| .int_en = GPIO_INT_EN_6, |
| .int_edge = GPIO_INT_EDGE_6, |
| .int_pos = GPIO_INT_POS_6, |
| .oe = GPIO_OE_6, |
| }, |
| { |
| .out = GPIO_OUT_7, |
| .in = GPIO_IN_7, |
| .int_status = GPIO_INT_STATUS_7, |
| .int_clear = GPIO_INT_CLEAR_7, |
| .int_en = GPIO_INT_EN_7, |
| .int_edge = GPIO_INT_EDGE_7, |
| .int_pos = GPIO_INT_POS_7, |
| .oe = GPIO_OE_7, |
| }, |
| }; |
| |
| static gpioregs *find_gpio(unsigned n, unsigned *bit) |
| { |
| if(n > 164) return 0; |
| if(n > 152) { |
| *bit = 1 << (n - 153); |
| return GPIO_REGS + 7; |
| } |
| if(n > 121) { |
| *bit = 1 << (n - 122); |
| return GPIO_REGS + 6; |
| } |
| if(n > 103) { |
| *bit = 1 << (n - 104); |
| return GPIO_REGS + 5; |
| } |
| 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; |
| } |
| |
| |