bsps: Move I2C drivers to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

1 files changed, 152 insertions, 0 deletions

diff --git a/bsps/powerpc/gen83xx/i2c/i2c_init.c b/bsps/powerpc/gen83xx/i2c/i2c_init.c
new file mode 100644
index 0000000000..7fdd6bbd4c
--- /dev/null
+++ b/bsps/powerpc/gen83xx/i2c/i2c_init.c
@@ -0,0 +1,152 @@
+/*===============================================================*\
+| 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 I2C driver parameters  |
+\*===============================================================*/
+
+
+#include <mpc83xx/mpc83xx_i2cdrv.h>
+#include <libchip/i2c-2b-eeprom.h>
+#include <libchip/i2c-sc620.h>
+#include <bsp/irq.h>
+#include <bsp.h>
+
+static void i2c1_probe(mpc83xx_i2c_softc_t *self)
+{
+#if MPC83XX_CHIP_TYPE != 8309
+  if (((mpc83xx.clk.sccr >> (31-1)) & 0x03) > 0) {
+    self->base_frq =
+      (BSP_bus_frequency
+       /((mpc83xx.clk.sccr >> (31-1)) & 0x03));
+  }
+#else /* MPC83XX_CHIP_TYPE != 8309 */
+  self->base_frq = BSP_bus_frequency;
+#endif /* MPC83XX_CHIP_TYPE != 8309 */
+}
+
+#ifndef MPC83XX_BOARD_BR_UID
+static void i2c2_probe(mpc83xx_i2c_softc_t *self)
+{
+  self->base_frq = BSP_bus_frequency;
+}
+#endif /* MPC83XX_BOARD_BR_UID */
+
+static mpc83xx_i2c_desc_t mpc83xx_i2c_bus_tbl[] = {
+  /* first channel */
+  {
+    {/* public fields */
+      .ops = &mpc83xx_i2c_ops,
+      .size = sizeof(mpc83xx_i2c_bus_tbl[0]),
+    },
+    { /* our private fields */
+      .reg_ptr = &mpc83xx.i2c[0],
+      .initialized = FALSE,
+      .irq_number = BSP_IPIC_IRQ_I2C1,
+      .base_frq = 0, /* will be set during probe */
+      .probe = i2c1_probe
+    }
+  }
+#ifndef MPC83XX_BOARD_BR_UID
+  /* second channel */
+  , {
+    { /* public fields */
+      .ops = &mpc83xx_i2c_ops,
+      .size = sizeof(mpc83xx_i2c_bus_tbl[0]),
+    },
+    { /* our private fields */
+      .reg_ptr = &mpc83xx.i2c[1],
+      .initialized = FALSE,
+      .irq_number = BSP_IPIC_IRQ_I2C2,
+      .base_frq = 0, /* will be set during probe */
+      .probe = i2c2_probe
+    }
+  }
+#endif /* MPC83XX_BOARD_BR_UID */
+};
+
+/*=========================================================================*\
+| Function:                                                                 |
+\*-------------------------------------------------------------------------*/
+rtems_status_code bsp_register_i2c
+(
+/*-------------------------------------------------------------------------*\
+| Purpose:                                                                  |
+|   register I2C busses and devices                                         |
++---------------------------------------------------------------------------+
+| Input Parameters:                                                         |
+\*-------------------------------------------------------------------------*/
+ void                                    /* <none>                         */
+)
+/*-------------------------------------------------------------------------*\
+| Return Value:                                                             |
+|    0 or error code                                                        |
+\*=========================================================================*/
+
+{
+  char device_path[] = "/dev/i2c?";
+  size_t n = RTEMS_ARRAY_SIZE(mpc83xx_i2c_bus_tbl);
+  size_t i;
+  int i2c_busno[n];
+
+  /*
+   * init I2C library (if not already done)
+   */
+  rtems_libi2c_initialize ();
+
+  /*
+   * init I2C buses
+   */
+  for (i = 0; i < n; ++i) {
+    mpc83xx_i2c_desc_t *desc = &mpc83xx_i2c_bus_tbl[i];
+
+    (*desc->softc.probe)(&desc->softc);
+    device_path[sizeof(device_path) - 2] = (char) ('1' + i);
+    i2c_busno[i] = rtems_libi2c_register_bus(device_path, &desc->bus_desc);
+  }
+
+#if defined(RTEMS_BSP_I2C_EEPROM_DEVICE_NAME)
+  if (n > 0) {
+    /*
+     * register EEPROM to bus 1, Address 0x50
+     */
+    rtems_libi2c_register_drv(RTEMS_BSP_I2C_EEPROM_DEVICE_NAME,
+                 i2c_2b_eeprom_driver_descriptor,
+                 i2c_busno[0],0x50);
+  }
+#elif defined(MPC83XX_BOARD_BR_UID)
+  if (n > 0) {
+    rtems_libi2c_register_drv(
+      "sc620",
+      &i2c_sc620_driver,
+      i2c_busno[0],
+      0x70
+    );
+  }
+#else
+
+  /*
+   * We have no i2c configuration for this variant but need to mark
+   * i2c_busno as used.
+   */
+   (void) i2c_busno[0]; /* avoid set but not used warning */
+#endif
+
+  /*
+   * FIXME: register RTC driver, when available
+   */
+
+  return RTEMS_SUCCESSFUL;
+}