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Net - new API for handling PHY devices
- From: Gary Thomas <gary at mlbassoc dot com>
- To: eCos patches <ecos-patches at sources dot redhat dot com>
- Date: 19 Aug 2003 11:27:36 -0600
- Subject: Net - new API for handling PHY devices
- Organization: MLB Associates
Still rough, but at least a framework for handling these devices.
--
Gary Thomas <gary@mlbassoc.com>
MLB Associates
Index: devs/eth/phy/current/ChangeLog
===================================================================
RCS file: devs/eth/phy/current/ChangeLog
diff -N devs/eth/phy/current/ChangeLog
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ devs/eth/phy/current/ChangeLog 19 Aug 2003 16:32:28 -0000
@@ -0,0 +1,45 @@
+2003-08-19 Gary Thomas <gary@mlbassoc.com>
+
+ * src/eth_phy.c:
+ * include/eth_phy.h:
+ * cdl/phy_eth_drivers.cdl: New file(s) - generic API for dealing
+ with ethernet PHY devices, allowing network drivers more flexibility.
+
+//===========================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+// Copyright (C) 2003 Gary Thomas
+//
+// eCos 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 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+//
+// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+// at http://sources.redhat.com/ecos/ecos-license/
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//===========================================================================
+
+
+
Index: devs/eth/phy/current/cdl/phy_eth_drivers.cdl
===================================================================
RCS file: devs/eth/phy/current/cdl/phy_eth_drivers.cdl
diff -N devs/eth/phy/current/cdl/phy_eth_drivers.cdl
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ devs/eth/phy/current/cdl/phy_eth_drivers.cdl 19 Aug 2003 14:52:04 -0000
@@ -0,0 +1,62 @@
+#====================================================================
+#
+# phy_eth_drivers.cdl
+#
+# API support for ethernet transcievers (PHY)
+#
+#====================================================================
+#####ECOSGPLCOPYRIGHTBEGIN####
+## -------------------------------------------
+## This file is part of eCos, the Embedded Configurable Operating System.
+## Copyright (C) 2003 Gary Thomas
+##
+## eCos 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 or (at your option) any later version.
+##
+## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+## WARRANTY; without even the implied warranty of MERCHANTABILITY or
+## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+## for more details.
+##
+## You should have received a copy of the GNU General Public License along
+## with eCos; if not, write to the Free Software Foundation, Inc.,
+## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+##
+## As a special exception, if other files instantiate templates or use macros
+## or inline functions from this file, or you compile this file and link it
+## with other works to produce a work based on this file, this file does not
+## by itself cause the resulting work to be covered by the GNU General Public
+## License. However the source code for this file must still be made available
+## in accordance with section (3) of the GNU General Public License.
+##
+## This exception does not invalidate any other reasons why a work based on
+## this file might be covered by the GNU General Public License.
+##
+## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+## at http://sources.redhat.com/ecos/ecos-license/
+## -------------------------------------------
+#####ECOSGPLCOPYRIGHTEND####
+# ====================================================================
+######DESCRIPTIONBEGIN####
+#
+# Author(s): gthomas
+# Original data: gthomas
+# Contributors: gthomas
+# Date: 2003-08-01
+#
+#####DESCRIPTIONEND####
+#
+#====================================================================
+
+cdl_package CYGPKG_DEVS_ETH_PHY {
+ display "Ethernet transciever (PHY) support"
+ description "API for ethernet PHY devices"
+
+ parent CYGPKG_IO_ETH_DRIVERS
+ active_if CYGPKG_IO_ETH_DRIVERS
+
+ include_dir cyg/io
+
+ compile eth_phy.c
+}
Index: devs/eth/phy/current/include/eth_phy.h
===================================================================
RCS file: devs/eth/phy/current/include/eth_phy.h
diff -N devs/eth/phy/current/include/eth_phy.h
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ devs/eth/phy/current/include/eth_phy.h 19 Aug 2003 14:52:04 -0000
@@ -0,0 +1,89 @@
+#ifndef CYGONCE_DEVS_ETH_PHY_H_
+#define CYGONCE_DEVS_ETH_PHY_H_
+//==========================================================================
+//
+// eth_phy.h
+//
+// API for ethernet transciever (PHY) support
+//
+//==========================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 2003 Gary Thomas
+//
+// eCos 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 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+//
+// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+// at http://sources.redhat.com/ecos/ecos-license/
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s): gthomas
+// Contributors: gthomas
+// Date: 2003-08-01
+// Purpose:
+// Description:
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+
+// Transceiver mode
+#define PHY_BMCR 0x00 // Register number
+#define PHY_BMCR_RESET 0x8000
+#define PHY_BMCR_LOOPBACK 0x4000
+#define PHY_BMCR_100MB 0x2000
+#define PHY_BMCR_AUTO_NEG 0x1000
+#define PHY_BMCR_POWER_DOWN 0x0800
+#define PHY_BMCR_ISOLATE 0x0400
+#define PHY_BMCR_RESTART 0x0200
+#define PHY_BMCR_FULL_DUPLEX 0x0100
+#define PHY_BMCR_COLL_TEST 0x0080
+
+#define PHY_BMSR 0x01 // Status register
+#define PHY_BMSR_AUTO_NEG 0x0020
+#define PHY_BMSR_LINK 0x0004
+
+// Physical device access - defined by hardware instance
+typedef struct {
+ void (*init)(void);
+ void (*set_data)(int);
+ int (*get_data)(void);
+ void (*set_clock)(int);
+ void (*set_dir)(int);
+} eth_phy_access_t;
+
+#define ETH_PHY_ACCESS_FUNS(_l,_init,_set_data,_get_data,_set_clock,_set_dir) \
+static eth_phy_access_t _l = {_init, _set_data, _get_data, _set_clock, _set_dir}
+
+externC void _eth_phy_init(eth_phy_access_t *f);
+externC void _eth_phy_write(eth_phy_access_t *f, int reg, int unit, unsigned short data);
+externC bool _eth_phy_read(eth_phy_access_t *f, int reg, int unit, unsigned short *val);
+
+#endif // CYGONCE_DEVS_ETH_PHY_H_
+// ------------------------------------------------------------------------
Index: devs/eth/phy/current/src/eth_phy.c
===================================================================
RCS file: devs/eth/phy/current/src/eth_phy.c
diff -N devs/eth/phy/current/src/eth_phy.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ devs/eth/phy/current/src/eth_phy.c 19 Aug 2003 14:52:04 -0000
@@ -0,0 +1,168 @@
+//==========================================================================
+//
+// dev/eth_phy.c
+//
+// Ethernet transciever (PHY) support
+//
+//==========================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 2003 Gary Thomas
+//
+// eCos 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 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+//
+// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+// at http://sources.redhat.com/ecos/ecos-license/
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s): gthomas
+// Contributors:
+// Date: 2003-08-01
+// Purpose:
+// Description: API support for ethernet PHY
+//
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <pkgconf/system.h>
+#include <cyg/infra/cyg_type.h>
+#include <cyg/infra/diag.h>
+
+#include <cyg/hal/hal_arch.h>
+#include <cyg/hal/drv_api.h>
+#include <cyg/hal/hal_if.h>
+
+#include <cyg/io/eth_phy.h>
+
+// MII interface
+#define MII_Start 0x40000000
+#define MII_Read 0x20000000
+#define MII_Write 0x10000000
+#define MII_Cmd 0x30000000
+#define MII_Phy(phy) (phy << 23)
+#define MII_Reg(reg) (reg << 18)
+#define MII_TA 0x00020000
+
+//
+// PHY unit access (via MII channel)
+//
+
+static cyg_uint32
+phy_cmd(eth_phy_access_t *f, cyg_uint32 cmd)
+{
+ cyg_uint32 retval;
+ int i, off;
+ bool is_read = ((cmd & MII_Cmd) == MII_Read);
+
+ // Set both bits as output
+ (f->set_dir)(1);
+
+ // Preamble
+ for (i = 0; i < 32; i++) {
+ (f->set_clock)(0);
+ (f->set_data)(1);
+ CYGACC_CALL_IF_DELAY_US(1);
+ (f->set_clock)(1);
+ CYGACC_CALL_IF_DELAY_US(1);
+ }
+
+ // Command/data
+ for (i = 0, off = 31; i < (is_read ? 14 : 32); i++, --off) {
+ (f->set_clock)(0);
+ (f->set_data)((cmd >> off) & 0x00000001);
+ CYGACC_CALL_IF_DELAY_US(1);
+ (f->set_clock)(1);
+ CYGACC_CALL_IF_DELAY_US(1);
+ }
+
+ retval = cmd;
+
+ // If read, fetch data register
+ if (is_read) {
+ retval >>= 16;
+
+ (f->set_clock)(0);
+ (f->set_dir)(0);
+ CYGACC_CALL_IF_DELAY_US(1);
+ (f->set_clock)(1);
+ CYGACC_CALL_IF_DELAY_US(1);
+ (f->set_clock)(0);
+ CYGACC_CALL_IF_DELAY_US(1);
+
+ for (i = 0, off = 15; i < 16; i++, off--) {
+ (f->set_clock)(1);
+ retval <<= 1;
+ retval |= (f->get_data)();
+ CYGACC_CALL_IF_DELAY_US(1);
+ (f->set_clock)(0);
+ CYGACC_CALL_IF_DELAY_US(1);
+ }
+ }
+
+ // Set both bits as output
+ (f->set_dir)(1);
+
+ // Postamble
+ for (i = 0; i < 32; i++) {
+ (f->set_clock)(0);
+ (f->set_data)(1);
+ CYGACC_CALL_IF_DELAY_US(1);
+ (f->set_clock)(1);
+ CYGACC_CALL_IF_DELAY_US(1);
+ }
+
+ return retval;
+}
+
+externC void
+_eth_phy_init(eth_phy_access_t *f)
+{
+ (f->init)();
+}
+
+externC void
+_eth_phy_write(eth_phy_access_t *f, int reg, int addr, unsigned short data)
+{
+ phy_cmd(f, MII_Start | MII_Write | MII_Phy(addr) | MII_Reg(reg) | MII_TA | data);
+}
+
+externC bool
+_eth_phy_read(eth_phy_access_t *f, int reg, int addr, unsigned short *val)
+{
+ cyg_uint32 ret;
+
+ ret = phy_cmd(f, MII_Start | MII_Read | MII_Phy(addr) | MII_Reg(reg) | MII_TA);
+ *val = ret;
+ return true;
+}
+
+externC void _eth_phy_init(eth_phy_access_t *f);
+externC void _eth_phy_write(eth_phy_access_t *f, int reg, int unit, unsigned short data);
+externC bool _eth_phy_read(eth_phy_access_t *f, int reg, int unit, unsigned short *val);