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-rw-r--r--bsps/powerpc/gen83xx/spi/spi_init.c416
1 files changed, 416 insertions, 0 deletions
diff --git a/bsps/powerpc/gen83xx/spi/spi_init.c b/bsps/powerpc/gen83xx/spi/spi_init.c
new file mode 100644
index 0000000000..a2a2683d59
--- /dev/null
+++ b/bsps/powerpc/gen83xx/spi/spi_init.c
@@ -0,0 +1,416 @@
+/*===============================================================*\
+| Project: RTEMS support for MPC83xx |
++-----------------------------------------------------------------+
+| Copyright (c) 2007 |
+| Embedded Brains GmbH |
+| Obere Lagerstr. 30 |
+| D-82178 Puchheim |
+| Germany |
+| rtems@embedded-brains.de |
++-----------------------------------------------------------------+
+| The license and distribution terms for this file may be |
+| found in the file LICENSE in this distribution or at |
+| |
+| http://www.rtems.org/license/LICENSE. |
+| |
++-----------------------------------------------------------------+
+| this file contains the low level MPC83xx SPI driver parameters |
+| and board-specific functions |
+\*===============================================================*/
+
+
+#include <mpc83xx/mpc83xx_spidrv.h>
+#include <bsp/irq.h>
+#include <bsp.h>
+
+#if defined(MPC83XX_BOARD_MPC8313ERDB)
+
+#include <libchip/spi-sd-card.h>
+
+#elif defined(MPC83XX_BOARD_MPC8349EAMDS)
+
+#include <libchip/spi-flash-m25p40.h>
+
+#elif defined(MPC83XX_BOARD_HSC_CM01)
+
+#include <libchip/spi-fram-fm25l256.h>
+
+#endif
+
+/*=========================================================================*\
+| Board-specific adaptation functions |
+\*=========================================================================*/
+
+/*=========================================================================*\
+| Function: |
+\*-------------------------------------------------------------------------*/
+static rtems_status_code bsp_spi_sel_addr
+(
+/*-------------------------------------------------------------------------*\
+| Purpose: |
+| address a slave device on the bus |
++---------------------------------------------------------------------------+
+| Input Parameters: |
+\*-------------------------------------------------------------------------*/
+ rtems_libi2c_bus_t *bh, /* bus specifier structure */
+ uint32_t addr, /* address to send on bus */
+ int rw /* 0=write,1=read */
+)
+/*-------------------------------------------------------------------------*\
+| Return Value: |
+| o = ok or error code |
+\*=========================================================================*/
+{
+
+#if defined( MPC83XX_BOARD_MPC8313ERDB)
+
+ /* Check address */
+ if (addr > 0) {
+ return RTEMS_INVALID_NUMBER;
+ }
+
+ /* SCS (active low) */
+ mpc83xx.gpio [0].gpdat &= ~0x20000000;
+
+#elif defined( MPC83XX_BOARD_MPC8349EAMDS)
+
+ /*
+ * check device address for valid range
+ */
+ if (addr > 0) {
+ return RTEMS_INVALID_NUMBER;
+ }
+ /*
+ * select given device
+ * GPIO1[0] is nSEL_SPI for M25P40
+ * set it to be active/low
+ */
+ mpc83xx.gpio[0].gpdat &= ~(1 << (31- 0));
+
+#elif defined( MPC83XX_BOARD_HSC_CM01)
+
+ /*
+ * check device address for valid range
+ */
+ if (addr > 7) {
+ return RTEMS_INVALID_NUMBER;
+ }
+ /*
+ * select given device
+ */
+ /*
+ * GPIO1[24] is SPI_A0
+ * GPIO1[25] is SPI_A1
+ * GPIO1[26] is SPI_A2
+ * set pins to address
+ */
+ mpc83xx.gpio[0].gpdat =
+ (mpc83xx.gpio[0].gpdat & ~(0x7 << (31-26)))
+ | (addr << (31-26));
+ /*
+ * GPIO1[27] is high-active strobe
+ */
+ mpc83xx.gpio[0].gpdat |= (1 << (31- 27));
+
+#endif
+
+ return RTEMS_SUCCESSFUL;
+}
+
+/*=========================================================================*\
+| Function: |
+\*-------------------------------------------------------------------------*/
+static rtems_status_code bsp_spi_send_start_dummy
+(
+/*-------------------------------------------------------------------------*\
+| Purpose: |
+| dummy function, SPI has no start condition |
++---------------------------------------------------------------------------+
+| Input Parameters: |
+\*-------------------------------------------------------------------------*/
+ rtems_libi2c_bus_t *bh /* bus specifier structure */
+)
+/*-------------------------------------------------------------------------*\
+| Return Value: |
+| o = ok or error code |
+\*=========================================================================*/
+{
+
+#if defined( MPC83XX_BOARD_MPC8313ERDB)
+
+ /* SCS (inactive high) */
+ mpc83xx.gpio [0].gpdat |= 0x20000000;
+
+#elif defined( MPC83XX_BOARD_MPC8349EAMDS)
+
+ /*
+ * GPIO1[0] is nSEL_SPI for M25P40
+ * set it to inactive/high
+ */
+ mpc83xx.gpio[0].gpdat |= (1 << (31- 0));
+
+#elif defined( MPC83XX_BOARD_HSC_CM01)
+
+ /*
+ * GPIO1[27] is high-active strobe
+ * set it to inactive/ low
+ */
+ mpc83xx.gpio[0].gpdat &= ~(0x1 << (31-27));
+
+#endif
+
+ return 0;
+}
+
+/*=========================================================================*\
+| Function: |
+\*-------------------------------------------------------------------------*/
+static rtems_status_code bsp_spi_send_stop
+(
+/*-------------------------------------------------------------------------*\
+| Purpose: |
+| deselect SPI |
++---------------------------------------------------------------------------+
+| Input Parameters: |
+\*-------------------------------------------------------------------------*/
+ rtems_libi2c_bus_t *bh /* bus specifier structure */
+)
+/*-------------------------------------------------------------------------*\
+| Return Value: |
+| o = ok or error code |
+\*=========================================================================*/
+{
+#if defined(DEBUG)
+ printk("bsp_spi_send_stop called... ");
+#endif
+
+#if defined( MPC83XX_BOARD_MPC8313ERDB)
+
+ /* SCS (inactive high) */
+ mpc83xx.gpio [0].gpdat |= 0x20000000;
+
+#elif defined( MPC83XX_BOARD_MPC8349EAMDS)
+
+ /*
+ * deselect given device
+ * GPIO1[0] is nSEL_SPI for M25P40
+ * set it to be inactive/high
+ */
+ mpc83xx.gpio[0].gpdat |= (1 << (31- 0));
+
+#elif defined( MPC83XX_BOARD_HSC_CM01)
+
+ /*
+ * deselect device
+ * GPIO1[27] is high-active strobe
+ */
+ mpc83xx.gpio[0].gpdat &= ~(1 << (31- 27));
+
+#endif
+
+#if defined(DEBUG)
+ printk("... exit OK\r\n");
+#endif
+ return 0;
+}
+
+/*=========================================================================*\
+| list of handlers |
+\*=========================================================================*/
+
+rtems_libi2c_bus_ops_t bsp_spi_ops = {
+ .init = mpc83xx_spi_init,
+ .send_start = bsp_spi_send_start_dummy,
+ .send_stop = bsp_spi_send_stop,
+ .send_addr = bsp_spi_sel_addr,
+ .read_bytes = mpc83xx_spi_read_bytes,
+ .write_bytes = mpc83xx_spi_write_bytes,
+ .ioctl = mpc83xx_spi_ioctl
+};
+
+static mpc83xx_spi_desc_t bsp_spi_bus_desc = {
+ {/* public fields */
+ .ops = &bsp_spi_ops,
+ .size = sizeof(bsp_spi_bus_desc)
+ },
+ { /* our private fields */
+ .reg_ptr =&mpc83xx.spi,
+ .initialized = FALSE,
+ .irq_number = BSP_IPIC_IRQ_SPI,
+ .base_frq = 0 /* filled in during init */
+ }
+};
+
+#ifdef MPC83XX_BOARD_MPC8313ERDB
+
+#include <libchip/spi-sd-card.h>
+
+#define SD_CARD_NUMBER 1
+
+size_t sd_card_driver_table_size = SD_CARD_NUMBER;
+
+sd_card_driver_entry sd_card_driver_table [SD_CARD_NUMBER] = {
+ {
+ .device_name = "/dev/sd-card-a",
+ .bus = 0,
+ .transfer_mode = SD_CARD_TRANSFER_MODE_DEFAULT,
+ .command = SD_CARD_COMMAND_DEFAULT,
+ /* .response = whatever, */
+ .response_index = SD_CARD_COMMAND_SIZE,
+ .n_ac_max = SD_CARD_N_AC_MAX_DEFAULT,
+ .block_number = 0,
+ .block_size = 0,
+ .block_size_shift = 0,
+ .busy = true,
+ .verbose = true,
+ .schedule_if_busy = false
+ }
+};
+
+#endif /* MPC83XX_BOARD_MPC8313ERDB */
+
+
+/*=========================================================================*\
+| initialization |
+\*=========================================================================*/
+
+/*=========================================================================*\
+| Function: |
+\*-------------------------------------------------------------------------*/
+rtems_status_code bsp_register_spi
+(
+/*-------------------------------------------------------------------------*\
+| Purpose: |
+| register SPI bus and devices |
++---------------------------------------------------------------------------+
+| Input Parameters: |
+\*-------------------------------------------------------------------------*/
+ void /* <none> */
+)
+/*-------------------------------------------------------------------------*\
+| Return Value: |
+| 0 or error code |
+\*=========================================================================*/
+{
+ #if defined(MPC83XX_BOARD_MPC8313ERDB)
+ rtems_status_code sc = RTEMS_SUCCESSFUL;
+ #endif
+ unsigned spi_busno;
+ int ret_code;
+
+ /*
+ * init I2C library (if not already done)
+ */
+ rtems_libi2c_initialize ();
+
+ /*
+ * init port pins used to address/select SPI devices
+ */
+
+#if defined(MPC83XX_BOARD_MPC8313ERDB)
+
+ /*
+ * Configured as master (direct connection to SD card)
+ *
+ * GPIO[28] : SOUT
+ * GPIO[29] : SIN
+ * GPIO[30] : SCLK
+ * GPIO[02] : SCS (inactive high), GPIO[02] is normally connected to U43 at
+ * pin 15 of MC74LCX244DT.
+ */
+
+ /* Function */
+ mpc83xx.syscon.sicrl = (mpc83xx.syscon.sicrl & ~0x03fc0000) | 0x30000000;
+
+ /* Direction */
+ mpc83xx.gpio [0].gpdir = (mpc83xx.gpio [0].gpdir & ~0x0000000f) | 0x2000000b;
+
+ /* Data */
+ mpc83xx.gpio [0].gpdat |= 0x20000000;
+
+ /* Open Drain */
+ /* mpc83xx.gpio [0].gpdr |= 0x0000000f; */
+
+#elif defined(MPC83XX_BOARD_MPC8349EAMDS)
+
+ /*
+ * GPIO1[0] is nSEL_SPI for M25P40
+ * set it to be output, high
+ */
+ mpc83xx.gpio[0].gpdat |= (1 << (31- 0));
+ mpc83xx.gpio[0].gpdir |= (1 << (31- 0));
+ mpc83xx.gpio[0].gpdr &= ~(1 << (31- 0));
+
+#elif defined(MPC83XX_BOARD_HSC_CM01)
+
+ /*
+ * GPIO1[24] is SPI_A0
+ * GPIO1[25] is SPI_A1
+ * GPIO1[26] is SPI_A2
+ * GPIO1[27] is high-active strobe
+ * set pins to be output, low
+ */
+ mpc83xx.gpio[0].gpdat &= ~(0xf << (31-27));
+ mpc83xx.gpio[0].gpdir |= (0xf << (31-27));
+ mpc83xx.gpio[0].gpdr &= ~(0xf << (31-27));
+
+#else
+
+ /*
+ * There is no SPI configuration information for this variant.
+ */
+ (void) spi_busno; /* avoid set but not used warning */
+#endif
+
+ /*
+ * update base frequency in spi descriptor
+ */
+ bsp_spi_bus_desc.softc.base_frq = BSP_bus_frequency;
+
+ /*
+ * register SPI bus
+ */
+ ret_code = rtems_libi2c_register_bus("/dev/spi",
+ &(bsp_spi_bus_desc.bus_desc));
+ if (ret_code < 0) {
+ return -ret_code;
+ }
+ spi_busno = (unsigned) ret_code;
+
+#if defined(MPC83XX_BOARD_MPC8313ERDB)
+
+ /* Register SD Card driver */
+ sd_card_driver_table [0].bus = spi_busno;
+ sc = sd_card_register();
+ if (sc != RTEMS_SUCCESSFUL) {
+ return sc;
+ }
+
+#elif defined(MPC83XX_BOARD_MPC8349EAMDS)
+
+ /*
+ * register M25P40 Flash
+ */
+ ret_code = rtems_libi2c_register_drv(RTEMS_BSP_SPI_FLASH_DEVICE_NAME,
+ spi_flash_m25p40_rw_driver_descriptor,
+ spi_busno,0x00);
+#elif defined(MPC83XX_BOARD_HSC_CM01)
+
+ /*
+ * register FM25L256 FRAM
+ */
+ ret_code = rtems_libi2c_register_drv(RTEMS_BSP_SPI_FRAM_DEVICE_NAME,
+ spi_fram_fm25l256_rw_driver_descriptor,
+ spi_busno,0x02);
+
+#endif
+
+ if (ret_code < 0) {
+ return -ret_code;
+ }
+
+ /*
+ * FIXME: further drivers, when available
+ */
+ return 0;
+}
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