mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2025-12-05 15:15:44 +00:00
added missing file
This commit is contained in:
Thomas Doerfler
@@ -1,3 +1,7 @@
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2007-12-04 Thomas Doerfler <Thomas.Doerfler@embedded-brains.de>
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* spi/spi_init.c: added missing file
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2007-12-03 Joel Sherrill <joel.sherrill@OARcorp.com>
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* Makefile.am, startup/bspstart.c: Moved most of the remaining CPU
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274
c/src/lib/libbsp/powerpc/gen83xx/spi/spi_init.c
Normal file
274
c/src/lib/libbsp/powerpc/gen83xx/spi/spi_init.c
Normal file
@@ -0,0 +1,274 @@
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/*===============================================================*\
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| Project: RTEMS support for MPC83xx |
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+-----------------------------------------------------------------+
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| Copyright (c) 2007 |
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| Embedded Brains GmbH |
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| Obere Lagerstr. 30 |
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| D-82178 Puchheim |
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| Germany |
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| rtems@embedded-brains.de |
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+-----------------------------------------------------------------+
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| The license and distribution terms for this file may be |
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| found in the file LICENSE in this distribution or at |
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| |
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| http://www.rtems.com/license/LICENSE. |
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| |
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+-----------------------------------------------------------------+
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| this file contains the low level MPC83xx SPI driver parameters |
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| and board-specific functions |
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\*===============================================================*/
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#include <mpc83xx/mpc83xx_spidrv.h>
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#include <bsp/irq.h>
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#include <bsp.h>
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#if defined(MPC8349EAMDS)
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#include <libchip/i2c-2b-eeprom.h>
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#include <libchip/spi-flash-m25p40.h>
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#endif
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/*=========================================================================*\
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| Board-specific adaptation functions |
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\*=========================================================================*/
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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static rtems_status_code bsp_spi_sel_addr
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(
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| address a slave device on the bus |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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rtems_libi2c_bus_t *bh, /* bus specifier structure */
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uint32_t addr, /* address to send on bus */
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int rw /* 0=write,1=read */
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)
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| o = ok or error code |
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\*=========================================================================*/
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{
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#if defined(MPC8349EAMDS)
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/*
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* check device address for valid range
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*/
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if (addr > 0) {
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return RTEMS_INVALID_NUMBER;
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}
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/*
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* select given device
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* GPIO1[0] is nSEL_SPI for M25P40
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* set it to be active/low
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*/
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mpc83xx.gpio[0].gpdat &= ~(1 << (31- 0));
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#endif
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#if defined(HSC_CM01)
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/*
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* check device address for valid range
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*/
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if (addr > 7) {
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return RTEMS_INVALID_NUMBER;
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}
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/*
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* select given device
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*/
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/*
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* GPIO1[24] is SPI_A0
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* GPIO1[25] is SPI_A1
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* GPIO1[26] is SPI_A2
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* set pins to address
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*/
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mpc83xx.gpio[0].gpdat =
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(mpc83xx.gpio[0].gpdat & ~(0x7 << (31-26)))
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| (addr << (31-26));
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/*
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* GPIO1[27] is high-active strobe
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*/
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mpc83xx.gpio[0].gpdat |= (1 << (31- 27));
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#endif
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return RTEMS_SUCCESSFUL;
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}
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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static rtems_status_code bsp_spi_send_start_dummy
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(
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| dummy function, SPI has no start condition |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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rtems_libi2c_bus_t *bh /* bus specifier structure */
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)
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| o = ok or error code |
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\*=========================================================================*/
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{
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#if defined(MPC8349EAMDS)
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/*
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* GPIO1[0] is nSEL_SPI for M25P40
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* set it to inactive/high
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*/
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mpc83xx.gpio[0].gpdat |= (1 << (31- 0));
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#endif
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#if defined(HSC_CM01)
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/*
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* GPIO1[27] is high-active strobe
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* set it to inactive/ low
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*/
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mpc83xx.gpio[0].gpdat &= ~(0x1 << (31-27));
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#endif
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return 0;
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}
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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static rtems_status_code bsp_spi_send_stop
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(
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| deselect SPI |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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rtems_libi2c_bus_t *bh /* bus specifier structure */
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)
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| o = ok or error code |
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\*=========================================================================*/
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{
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#if defined(DEBUG)
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printk("bsp_spi_send_stop called... ");
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#endif
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#if defined(MPC8349EAMDS)
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/*
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* deselect given device
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* GPIO1[0] is nSEL_SPI for M25P40
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* set it to be inactive/high
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*/
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mpc83xx.gpio[0].gpdat |= (1 << (31- 0));
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#endif
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#if defined(HSC_CM01)
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/*
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* deselect device
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* GPIO1[27] is high-active strobe
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*/
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mpc83xx.gpio[0].gpdat &= ~(1 << (31- 27));
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#endif
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#if defined(DEBUG)
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printk("... exit OK\r\n");
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#endif
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return 0;
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}
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/*=========================================================================*\
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| list of handlers |
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\*=========================================================================*/
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rtems_libi2c_bus_ops_t bsp_spi_ops = {
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init: mpc83xx_spi_init,
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send_start: bsp_spi_send_start_dummy,
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send_stop: bsp_spi_send_stop,
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send_addr: bsp_spi_sel_addr,
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read_bytes: mpc83xx_spi_read_bytes,
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write_bytes: mpc83xx_spi_write_bytes,
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ioctl: mpc83xx_spi_ioctl
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};
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static mpc83xx_spi_desc_t bsp_spi_bus_desc = {
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{/* public fields */
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ops: &bsp_spi_ops,
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size: sizeof(bsp_spi_bus_desc),
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},
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{ /* our private fields */
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reg_ptr: &mpc83xx.spi,
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initialized: FALSE,
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irq_number: BSP_IPIC_IRQ_SPI
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}
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};
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/*=========================================================================*\
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| initialization |
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\*=========================================================================*/
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/*=========================================================================*\
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| Function: |
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\*-------------------------------------------------------------------------*/
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rtems_status_code bsp_register_spi
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(
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/*-------------------------------------------------------------------------*\
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| Purpose: |
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| register SPI bus and devices |
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+---------------------------------------------------------------------------+
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| Input Parameters: |
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\*-------------------------------------------------------------------------*/
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void /* <none> */
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)
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/*-------------------------------------------------------------------------*\
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| Return Value: |
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| 0 or error code |
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\*=========================================================================*/
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{
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int ret_code;
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int spi_busno;
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/*
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* init I2C library (if not already done)
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*/
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rtems_libi2c_initialize ();
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/*
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* init port pins used to address/select SPI devices
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*/
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#if defined(MPC8349EAMDS)
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/*
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* GPIO1[0] is nSEL_SPI for M25P40
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* set it to be output, high
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*/
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mpc83xx.gpio[0].gpdat |= (1 << (31- 0));
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mpc83xx.gpio[0].gpdir |= (1 << (31- 0));
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mpc83xx.gpio[0].gpdr &= ~(1 << (31- 0));
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#endif
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#if defined(HSC_CM01)
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/*
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* GPIO1[24] is SPI_A0
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* GPIO1[25] is SPI_A1
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* GPIO1[26] is SPI_A2
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* GPIO1[27] is high-active strobe
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* set pins to be output, low
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*/
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mpc83xx.gpio[0].gpdat &= ~(0xf << (31-27));
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mpc83xx.gpio[0].gpdir |= (0xf << (31-27));
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mpc83xx.gpio[0].gpdr &= ~(0xf << (31-27));
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#endif
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/*
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* register SPI bus
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*/
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ret_code = rtems_libi2c_register_bus("/dev/spi",
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&(bsp_spi_bus_desc.bus_desc));
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if (ret_code < 0) {
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return -ret_code;
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}
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spi_busno = ret_code;
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/*
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* register M25P40 Flash, when available
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*/
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#if defined(MPC8349EAMDS)
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ret_code = rtems_libi2c_register_drv(RTEMS_BSP_SPI_FLASH_DEVICE_NAME,
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spi_flash_m25p40_rw_driver_descriptor,
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spi_busno,0x00);
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if (ret_code < 0) {
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return -ret_code;
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}
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#endif
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/*
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* FIXME: further drivers, when available
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*/
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return 0;
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}
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