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271 lines
6.1 KiB
C
271 lines
6.1 KiB
C
/*
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* GPIO driver for TI DaVinci DA8xx SOCs.
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*
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* (C) Copyright 2011 Guralp Systems Ltd.
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* Laurence Withers <lwithers@guralp.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/gpio.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/davinci_misc.h>
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static struct gpio_registry {
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int is_registered;
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char name[GPIO_NAME_SIZE];
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} gpio_registry[MAX_NUM_GPIOS];
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#define pinmux(x) (&davinci_syscfg_regs->pinmux[x])
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static const struct pinmux_config gpio_pinmux[] = {
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{ pinmux(1), 8, 7 }, /* GP0[0] */
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{ pinmux(1), 8, 6 },
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{ pinmux(1), 8, 5 },
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{ pinmux(1), 8, 4 },
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{ pinmux(1), 8, 3 },
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{ pinmux(1), 8, 2 },
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{ pinmux(1), 8, 1 },
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{ pinmux(1), 8, 0 },
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{ pinmux(0), 8, 7 },
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{ pinmux(0), 8, 6 },
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{ pinmux(0), 8, 5 },
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{ pinmux(0), 8, 4 },
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{ pinmux(0), 8, 3 },
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{ pinmux(0), 8, 2 },
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{ pinmux(0), 8, 1 },
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{ pinmux(0), 8, 0 },
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{ pinmux(4), 8, 7 }, /* GP1[0] */
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{ pinmux(4), 8, 6 },
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{ pinmux(4), 8, 5 },
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{ pinmux(4), 8, 4 },
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{ pinmux(4), 8, 3 },
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{ pinmux(4), 8, 2 },
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{ pinmux(4), 4, 1 },
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{ pinmux(4), 4, 0 },
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{ pinmux(3), 4, 0 },
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{ pinmux(2), 4, 6 },
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{ pinmux(2), 4, 5 },
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{ pinmux(2), 4, 4 },
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{ pinmux(2), 4, 3 },
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{ pinmux(2), 4, 2 },
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{ pinmux(2), 4, 1 },
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{ pinmux(2), 8, 0 },
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{ pinmux(6), 8, 7 }, /* GP2[0] */
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{ pinmux(6), 8, 6 },
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{ pinmux(6), 8, 5 },
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{ pinmux(6), 8, 4 },
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{ pinmux(6), 8, 3 },
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{ pinmux(6), 8, 2 },
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{ pinmux(6), 8, 1 },
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{ pinmux(6), 8, 0 },
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{ pinmux(5), 8, 7 },
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{ pinmux(5), 8, 6 },
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{ pinmux(5), 8, 5 },
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{ pinmux(5), 8, 4 },
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{ pinmux(5), 8, 3 },
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{ pinmux(5), 8, 2 },
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{ pinmux(5), 8, 1 },
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{ pinmux(5), 8, 0 },
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{ pinmux(8), 8, 7 }, /* GP3[0] */
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{ pinmux(8), 8, 6 },
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{ pinmux(8), 8, 5 },
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{ pinmux(8), 8, 4 },
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{ pinmux(8), 8, 3 },
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{ pinmux(8), 8, 2 },
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{ pinmux(8), 8, 1 },
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{ pinmux(8), 8, 0 },
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{ pinmux(7), 8, 7 },
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{ pinmux(7), 8, 6 },
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{ pinmux(7), 8, 5 },
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{ pinmux(7), 8, 4 },
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{ pinmux(7), 8, 3 },
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{ pinmux(7), 8, 2 },
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{ pinmux(7), 8, 1 },
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{ pinmux(7), 8, 0 },
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{ pinmux(10), 8, 7 }, /* GP4[0] */
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{ pinmux(10), 8, 6 },
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{ pinmux(10), 8, 5 },
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{ pinmux(10), 8, 4 },
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{ pinmux(10), 8, 3 },
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{ pinmux(10), 8, 2 },
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{ pinmux(10), 8, 1 },
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{ pinmux(10), 8, 0 },
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{ pinmux(9), 8, 7 },
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{ pinmux(9), 8, 6 },
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{ pinmux(9), 8, 5 },
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{ pinmux(9), 8, 4 },
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{ pinmux(9), 8, 3 },
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{ pinmux(9), 8, 2 },
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{ pinmux(9), 8, 1 },
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{ pinmux(9), 8, 0 },
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{ pinmux(12), 8, 7 }, /* GP5[0] */
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{ pinmux(12), 8, 6 },
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{ pinmux(12), 8, 5 },
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{ pinmux(12), 8, 4 },
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{ pinmux(12), 8, 3 },
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{ pinmux(12), 8, 2 },
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{ pinmux(12), 8, 1 },
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{ pinmux(12), 8, 0 },
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{ pinmux(11), 8, 7 },
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{ pinmux(11), 8, 6 },
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{ pinmux(11), 8, 5 },
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{ pinmux(11), 8, 4 },
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{ pinmux(11), 8, 3 },
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{ pinmux(11), 8, 2 },
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{ pinmux(11), 8, 1 },
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{ pinmux(11), 8, 0 },
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{ pinmux(19), 8, 6 }, /* GP6[0] */
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{ pinmux(19), 8, 5 },
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{ pinmux(19), 8, 4 },
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{ pinmux(19), 8, 3 },
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{ pinmux(19), 8, 2 },
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{ pinmux(16), 8, 1 },
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{ pinmux(14), 8, 1 },
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{ pinmux(14), 8, 0 },
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{ pinmux(13), 8, 7 },
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{ pinmux(13), 8, 6 },
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{ pinmux(13), 8, 5 },
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{ pinmux(13), 8, 4 },
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{ pinmux(13), 8, 3 },
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{ pinmux(13), 8, 2 },
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{ pinmux(13), 8, 1 },
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{ pinmux(13), 8, 0 },
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{ pinmux(18), 8, 1 }, /* GP7[0] */
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{ pinmux(18), 8, 0 },
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{ pinmux(17), 8, 7 },
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{ pinmux(17), 8, 6 },
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{ pinmux(17), 8, 5 },
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{ pinmux(17), 8, 4 },
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{ pinmux(17), 8, 3 },
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{ pinmux(17), 8, 2 },
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{ pinmux(17), 8, 1 },
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{ pinmux(17), 8, 0 },
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{ pinmux(16), 8, 7 },
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{ pinmux(16), 8, 6 },
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{ pinmux(16), 8, 5 },
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{ pinmux(16), 8, 4 },
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{ pinmux(16), 8, 3 },
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{ pinmux(16), 8, 2 },
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{ pinmux(19), 8, 0 }, /* GP8[0] */
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{ pinmux(3), 4, 7 },
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{ pinmux(3), 4, 6 },
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{ pinmux(3), 4, 5 },
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{ pinmux(3), 4, 4 },
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{ pinmux(3), 4, 3 },
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{ pinmux(3), 4, 2 },
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{ pinmux(2), 4, 7 },
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{ pinmux(19), 8, 1 },
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{ pinmux(19), 8, 0 },
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{ pinmux(18), 8, 7 },
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{ pinmux(18), 8, 6 },
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{ pinmux(18), 8, 5 },
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{ pinmux(18), 8, 4 },
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{ pinmux(18), 8, 3 },
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{ pinmux(18), 8, 2 },
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};
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int gpio_request(int gp, const char *label)
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{
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if (gp >= MAX_NUM_GPIOS)
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return -1;
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if (gpio_registry[gp].is_registered)
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return -1;
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gpio_registry[gp].is_registered = 1;
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strncpy(gpio_registry[gp].name, label, GPIO_NAME_SIZE);
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gpio_registry[gp].name[GPIO_NAME_SIZE - 1] = 0;
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davinci_configure_pin_mux(&gpio_pinmux[gp], 1);
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return 0;
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}
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void gpio_free(int gp)
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{
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gpio_registry[gp].is_registered = 0;
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}
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void gpio_toggle_value(int gp)
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{
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struct davinci_gpio *bank;
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bank = GPIO_BANK(gp);
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gpio_set_value(gp, !gpio_get_value(gp));
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}
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int gpio_direction_input(int gp)
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{
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struct davinci_gpio *bank;
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bank = GPIO_BANK(gp);
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setbits_le32(&bank->dir, 1U << GPIO_BIT(gp));
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return 0;
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}
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int gpio_direction_output(int gp, int value)
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{
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struct davinci_gpio *bank;
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bank = GPIO_BANK(gp);
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clrbits_le32(&bank->dir, 1U << GPIO_BIT(gp));
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gpio_set_value(gp, value);
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return 0;
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}
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int gpio_get_value(int gp)
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{
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struct davinci_gpio *bank;
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unsigned int ip;
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bank = GPIO_BANK(gp);
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ip = in_le32(&bank->in_data) & (1U << GPIO_BIT(gp));
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return ip ? 1 : 0;
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}
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void gpio_set_value(int gp, int value)
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{
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struct davinci_gpio *bank;
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bank = GPIO_BANK(gp);
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if (value)
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bank->set_data = 1U << GPIO_BIT(gp);
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else
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bank->clr_data = 1U << GPIO_BIT(gp);
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}
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void gpio_info(void)
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{
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int gp, dir, val;
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struct davinci_gpio *bank;
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for (gp = 0; gp < MAX_NUM_GPIOS; ++gp) {
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bank = GPIO_BANK(gp);
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dir = in_le32(&bank->dir) & (1U << GPIO_BIT(gp));
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val = gpio_get_value(gp);
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printf("% 4d: %s: %d [%c] %s\n",
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gp, dir ? " in" : "out", val,
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gpio_registry[gp].is_registered ? 'x' : ' ',
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gpio_registry[gp].name);
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}
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}
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