drivers/spi/sh_spi.h

   1 /*
   2  * SH SPI driver
   3  *
   4  * Copyright (C) 2011 Renesas Solutions Corp.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18  *
  19  */
  20
  21 #ifndef __SH_SPI_H__
  22 #define __SH_SPI_H__
  23
  24 #include <spi.h>
  25
  26 struct sh_spi_regs {
  27         unsigned long tbr_rbr;
  28         unsigned long resv1;
  29         unsigned long cr1;
  30         unsigned long resv2;
  31         unsigned long cr2;
  32         unsigned long resv3;
  33         unsigned long cr3;
  34         unsigned long resv4;
  35         unsigned long cr4;
  36 };
  37
  38 /* CR1 */
  39 #define SH_SPI_TBE      0x80
  40 #define SH_SPI_TBF      0x40
  41 #define SH_SPI_RBE      0x20
  42 #define SH_SPI_RBF      0x10
  43 #define SH_SPI_PFONRD   0x08
  44 #define SH_SPI_SSDB     0x04
  45 #define SH_SPI_SSD      0x02
  46 #define SH_SPI_SSA      0x01
  47
  48 /* CR2 */
  49 #define SH_SPI_RSTF     0x80
  50 #define SH_SPI_LOOPBK   0x40
  51 #define SH_SPI_CPOL     0x20
  52 #define SH_SPI_CPHA     0x10
  53 #define SH_SPI_L1M0     0x08
  54
  55 /* CR3 */
  56 #define SH_SPI_MAX_BYTE 0xFF
  57
  58 /* CR4 */
  59 #define SH_SPI_TBEI     0x80
  60 #define SH_SPI_TBFI     0x40
  61 #define SH_SPI_RBEI     0x20
  62 #define SH_SPI_RBFI     0x10
  63 #define SH_SPI_SSS1     0x08
  64 #define SH_SPI_WPABRT   0x04
  65 #define SH_SPI_SSS0     0x01
  66
  67 #define SH_SPI_FIFO_SIZE        32
  68 #define SH_SPI_NUM_CS           4
  69
  70 struct sh_spi {
  71         struct spi_slave        slave;
  72         struct sh_spi_regs      *regs;
  73 };
  74
  75 static inline struct sh_spi *to_sh_spi(struct spi_slave *slave)
  76 {
  77         return container_of(slave, struct sh_spi, slave);
  78 }
  79
  80 #endif