2011-07-20 Till Straumann <Till.Straumann@TU-Berlin.de>

	* if_em/Makefile.am, if_em/e1000_osdep.h, if_em/e1000_osdep.c,
	if_em/if_em.c: added e1000_osdep.c which implements all
	os-dependent parts in a bsdnet-agnostic fashion. Hence, the
	low-level driver can be used w/o bsdnet.
	FIXES: dependency on bsdnet initialization; PCI bus header
	was not initialized when not used via bsdnet (lanIpBasic driver
	crashed).

1 files changed, 158 insertions, 0 deletions

diff --git a/bsd_eth_drivers/if_em/e1000_osdep.c b/bsd_eth_drivers/if_em/e1000_osdep.c
new file mode 100644
index 0000000..781e99d
--- /dev/null
+++ b/bsd_eth_drivers/if_em/e1000_osdep.c
@@ -0,0 +1,158 @@
+/**************************************************************************
+
+Copyright (c) 2001-2007, Intel Corporation
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+ 3. Neither the name of the Intel Corporation nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+***************************************************************************/
+
+/*
+ * NOTE: the following routines using the e1000 
+ * 	naming style are provided to the shared
+ *	code which expects that rather than 'em'
+ */
+
+#include <rtems.h>
+#include <bsp.h>
+#include <rtems/pci.h>
+#include <e1000_api.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <time.h>
+
+#ifndef  PCIR_COMMAND
+#define  PCIR_COMMAND PCI_COMMAND
+#endif
+
+void
+e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
+{
+struct e1000_pcisig *s = hw->back;
+	pci_write_config_word( s->bus, s->dev, s->fun, reg, *value );
+}
+
+void
+e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
+{
+struct e1000_pcisig *s = hw->back;
+	pci_read_config_word( s->bus, s->dev, s->fun, reg, value );
+}
+
+void
+e1000_pci_set_mwi(struct e1000_hw *hw)
+{
+struct e1000_pcisig *s = hw->back;
+	pci_write_config_word( s->bus, s->dev, s->fun, PCIR_COMMAND,
+	    (hw->bus.pci_cmd_word | CMD_MEM_WRT_INVALIDATE) );
+}
+
+void
+e1000_pci_clear_mwi(struct e1000_hw *hw)
+{
+struct e1000_pcisig *s = hw->back;
+	pci_write_config_word( s->bus, s->dev, s->fun, PCIR_COMMAND,
+	    (hw->bus.pci_cmd_word & ~CMD_MEM_WRT_INVALIDATE) );
+}
+
+/*
+ * Read the PCI Express capabilities
+ */
+int32_t
+e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
+{
+	int32_t		error = E1000_SUCCESS;
+	uint16_t	cap_off;
+
+	switch (hw->mac.type) {
+
+		case e1000_82571:
+		case e1000_82572:
+		case e1000_82573:
+		case e1000_80003es2lan:
+			cap_off = 0xE0;
+			e1000_read_pci_cfg(hw, cap_off + reg, value);
+			break;
+		default:
+			error = ~E1000_NOT_IMPLEMENTED;
+			break;
+	}
+
+	return (error);	
+}
+
+int32_t
+e1000_alloc_zeroed_dev_spec_struct(struct e1000_hw *hw, uint32_t size)
+{
+	return (hw->dev_spec = calloc(1, size)) ? 0 : ENOMEM;
+}
+
+void
+e1000_free_dev_spec_struct(struct e1000_hw *hw)
+{
+	free ( hw->dev_spec );
+}
+
+
+void
+e1000_udelay(unsigned usecs)
+{
+rtems_interval  clock_f, ticks;
+uint64_t        tmp;
+struct timespec then, now; 
+	rtems_clock_get( RTEMS_CLOCK_GET_TICKS_PER_SECOND, &clock_f );
+
+	/* round up to next tick: 
+		floor( f*T + .5 ) = floor( f*T_us/1e6 + 0.5 )
+                          = floor( (f * T_us + 5e5) / 1e6 )
+	 */
+	tmp  = (uint64_t)clock_f * (uint64_t)usecs;
+
+	if ( tmp < 500000ULL ) {
+		/* less than half a tick -- busy wait */
+		clock_gettime( CLOCK_REALTIME, &then );
+		then.tv_sec  += usecs/1000000;
+		then.tv_nsec += (usecs % 1000000)*1000;
+		if ( then.tv_nsec >= 1000000000 ) {
+			then.tv_nsec -= 1000000000;
+			then.tv_sec++;
+		}
+
+		do {
+			clock_gettime( CLOCK_REALTIME, &now );
+
+		} while (  now.tv_sec < then.tv_sec ||
+		          (now.tv_sec == then.tv_sec && now.tv_nsec < then.tv_nsec) );
+	} else {
+		tmp += 500000ULL;
+		tmp /= 1000000ULL;
+
+		ticks = (rtems_interval)tmp;
+
+		rtems_task_wake_after( ticks );
+	}
+}