| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (c) 2007 Will Robertson |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| #ifndef SPI_IMX31_H |
| #define SPI_IMX31_H |
| |
| #define USE_CSPI1_MODULE (1 << 0) |
| #define USE_CSPI2_MODULE (1 << 1) |
| #define USE_CSPI3_MODULE (1 << 2) |
| |
| /* SPI_MODULE_MASK is set in target's config */ |
| enum spi_module_number |
| { |
| __CSPI_NUM_START = -1, /* The first will be 0 */ |
| #if (SPI_MODULE_MASK & USE_CSPI1_MODULE) |
| CSPI1_NUM, |
| #endif |
| #if (SPI_MODULE_MASK & USE_CSPI2_MODULE) |
| CSPI2_NUM, |
| #endif |
| #if (SPI_MODULE_MASK & USE_CSPI3_MODULE) |
| CSPI3_NUM, |
| #endif |
| SPI_NUM_CSPI, |
| }; |
| |
| struct cspi_map |
| { |
| volatile uint32_t rxdata; /* 00h */ |
| volatile uint32_t txdata; /* 04h */ |
| volatile uint32_t conreg; /* 08h */ |
| volatile uint32_t intreg; /* 0Ch */ |
| volatile uint32_t dmareg; /* 10h */ |
| volatile uint32_t statreg; /* 14h */ |
| volatile uint32_t periodreg; /* 18h */ |
| volatile uint32_t skip1[0x69]; /* 1Ch */ |
| volatile uint32_t testreg; /* 1C0h */ |
| }; |
| |
| struct spi_node |
| { |
| enum spi_module_number num; /* Module number (CSPIx_NUM) */ |
| unsigned long conreg; /* CSPI conreg setup */ |
| unsigned long periodreg; /* CSPI periodreg setup */ |
| }; |
| |
| struct spi_transfer |
| { |
| const void *txbuf; |
| void *rxbuf; |
| int count; |
| }; |
| |
| /* One-time init of SPI driver */ |
| void spi_init(void); |
| |
| /* Enable the specified module for the node */ |
| void spi_enable_module(struct spi_node *node); |
| |
| /* Disabled the specified module for the node */ |
| void spi_disable_module(struct spi_node *node); |
| |
| /* Lock module mutex */ |
| void spi_lock(struct spi_node *node); |
| |
| /* Unlock module mutex */ |
| void spi_unlock(struct spi_node *node); |
| |
| /* Send and/or receive data on the specified node */ |
| int spi_transfer(struct spi_node *node, struct spi_transfer *trans); |
| |
| #endif /* SPI_IMX31_H */ |