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c1d4ad9417
The module has 4 chip select signals. This patch supports it. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/*
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* SH SPI driver
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __SH_SPI_H__
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#define __SH_SPI_H__
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#include <spi.h>
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struct sh_spi_regs {
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unsigned long tbr_rbr;
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unsigned long resv1;
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unsigned long cr1;
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unsigned long resv2;
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unsigned long cr2;
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unsigned long resv3;
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unsigned long cr3;
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unsigned long resv4;
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unsigned long cr4;
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};
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/* CR1 */
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#define SH_SPI_TBE 0x80
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#define SH_SPI_TBF 0x40
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#define SH_SPI_RBE 0x20
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#define SH_SPI_RBF 0x10
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#define SH_SPI_PFONRD 0x08
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#define SH_SPI_SSDB 0x04
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#define SH_SPI_SSD 0x02
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#define SH_SPI_SSA 0x01
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/* CR2 */
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#define SH_SPI_RSTF 0x80
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#define SH_SPI_LOOPBK 0x40
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#define SH_SPI_CPOL 0x20
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#define SH_SPI_CPHA 0x10
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#define SH_SPI_L1M0 0x08
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/* CR3 */
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#define SH_SPI_MAX_BYTE 0xFF
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/* CR4 */
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#define SH_SPI_TBEI 0x80
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#define SH_SPI_TBFI 0x40
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#define SH_SPI_RBEI 0x20
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#define SH_SPI_RBFI 0x10
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#define SH_SPI_SSS1 0x08
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#define SH_SPI_WPABRT 0x04
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#define SH_SPI_SSS0 0x01
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#define SH_SPI_FIFO_SIZE 32
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#define SH_SPI_NUM_CS 4
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struct sh_spi {
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struct spi_slave slave;
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struct sh_spi_regs *regs;
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};
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static inline struct sh_spi *to_sh_spi(struct spi_slave *slave)
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{
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return container_of(slave, struct sh_spi, slave);
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}
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#endif
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