board/calao/sbc35_a9g20/spi.c

   1 /*
   2  * Copyright (C) 2009
   3  * Albin Tonnerre, Free Electrons <albin.tonnerre@free-electrons.com>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <asm/arch/hardware.h>
  26 #include <asm/arch/at91_spi.h>
  27 #include <asm/arch/gpio.h>
  28 #include <spi.h>
  29
  30 #define SBC_A9260_CS0_PIN       AT91_PIN_PA3
  31 #define SBC_A9260_CS1_PIN       AT91_PIN_PC11
  32
  33 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
  34 {
  35         return bus == 0 && (cs == 1 || cs == 0);
  36 }
  37
  38 void spi_cs_activate(struct spi_slave *slave)
  39 {
  40         if(slave->cs == 0)
  41                 at91_set_gpio_value(SBC_A9260_CS0_PIN, 0);
  42         else if(slave->cs == 1)
  43                 at91_set_gpio_value(SBC_A9260_CS1_PIN, 0);
  44 }
  45
  46 void spi_cs_deactivate(struct spi_slave *slave)
  47 {
  48         if(slave->cs == 0)
  49                 at91_set_gpio_value(SBC_A9260_CS0_PIN, 1);
  50         else if(slave->cs == 1)
  51                 at91_set_gpio_value(SBC_A9260_CS1_PIN, 1);
  52 }
  53
  54 void spi_init_f(void)
  55 {
  56         /* everything done in board_init */
  57 }