[PATCH] New PowerPC 4xx on-chip ethernet controller driver

This patch replaces current PowerPC 4xx EMAC driver with
new, re-written from the scratch version. This patch is quite big
(~234K) because there is virtualy 0% of common code between old and
new version.

New driver uses NAPI, it solves stability problems under heavy packet
load and low memory, corrects chip register access and fixes numerous
small bugs I don't even remember now.

This patch has been tested on all supported in 2.6 PPC 4xx boards.
It's been used in production for almost a year now on custom
4xx hardware. PPC32 specific parts are already upstream.

Patch was acked by the current EMAC driver maintainer (Matt Porter). I
will be maintaining this new version.

Signed-off-by: Eugene Surovegin <ebs@ebshome.net>
--

 Kconfig                   |   72
 ibm_emac/Makefile         |   13
 ibm_emac/ibm_emac.h       |  418 +++--
 ibm_emac/ibm_emac_core.c  | 3414 ++++++++++++++++++++++++----------------------
 ibm_emac/ibm_emac_core.h  |  313 ++--
 ibm_emac/ibm_emac_debug.c |  377 ++---
 ibm_emac/ibm_emac_debug.h |   63
 ibm_emac/ibm_emac_mal.c   |  674 +++++----
 ibm_emac/ibm_emac_mal.h   |  336 +++-
 ibm_emac/ibm_emac_phy.c   |  335 ++--
 ibm_emac/ibm_emac_phy.h   |  105 -
 ibm_emac/ibm_emac_rgmii.c |  201 ++
 ibm_emac/ibm_emac_rgmii.h |   68
 ibm_emac/ibm_emac_tah.c   |  111 +
 ibm_emac/ibm_emac_tah.h   |   96 -
 ibm_emac/ibm_emac_zmii.c  |  255 +++
 ibm_emac/ibm_emac_zmii.h  |  114 -
 17 files changed, 4114 insertions(+), 2851 deletions(-)
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 47 insertions, 57 deletions

diff --git a/drivers/net/ibm_emac/ibm_emac_zmii.h b/drivers/net/ibm_emac/ibm_emac_zmii.h
index 6f6cd2a39e3..0bb26062c0a 100644
--- a/drivers/net/ibm_emac/ibm_emac_zmii.h
+++ b/drivers/net/ibm_emac/ibm_emac_zmii.h
@@ -1,23 +1,27 @@
 /*
- * ocp_zmii.h
+ * drivers/net/ibm_emac/ibm_emac_zmii.h
  *
- * Defines for the IBM ZMII bridge
+ * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge support.
  *
- *      Armin Kuster akuster@mvista.com
- *      Dec, 2001
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
- * Copyright 2001 MontaVista Softare Inc.
+ * Based on original work by
+ *      Armin Kuster <akuster@mvista.com>
+ * 	Copyright 2001 MontaVista Softare Inc.
  *
  * This program 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 of the  License, or (at your
  * option) any later version.
+ *
  */
-
 #ifndef _IBM_EMAC_ZMII_H_
 #define _IBM_EMAC_ZMII_H_
 
 #include <linux/config.h>
+#include <linux/init.h>
+#include <asm/ocp.h>
 
 /* ZMII bridge registers */
 struct zmii_regs {
@@ -26,68 +30,54 @@ struct zmii_regs {
 	u32 smiirs;		/* SMII status reg */
 };
 
-#define ZMII_INPUTS	4
-
 /* ZMII device */
 struct ibm_ocp_zmii {
 	struct zmii_regs *base;
-	int mode[ZMII_INPUTS];
+	int mode;		/* subset of PHY_MODE_XXXX */
 	int users;		/* number of EMACs using this ZMII bridge */
+	u32 fer_save;		/* FER value left by firmware */
 };
 
-/* Fuctional Enable Reg */
-
-#define ZMII_FER_MASK(x)	(0xf0000000 >> (4*x))
-
-#define ZMII_MDI0	0x80000000
-#define ZMII_SMII0	0x40000000
-#define ZMII_RMII0	0x20000000
-#define ZMII_MII0	0x10000000
-#define ZMII_MDI1	0x08000000
-#define ZMII_SMII1	0x04000000
-#define ZMII_RMII1	0x02000000
-#define ZMII_MII1	0x01000000
-#define ZMII_MDI2	0x00800000
-#define ZMII_SMII2	0x00400000
-#define ZMII_RMII2	0x00200000
-#define ZMII_MII2	0x00100000
-#define ZMII_MDI3	0x00080000
-#define ZMII_SMII3	0x00040000
-#define ZMII_RMII3	0x00020000
-#define ZMII_MII3	0x00010000
+#ifdef CONFIG_IBM_EMAC_ZMII
+int zmii_attach(void *emac) __init;
 
-/* Speed Selection reg */
+void __zmii_fini(struct ocp_device *ocpdev, int input) __exit;
+static inline void zmii_fini(struct ocp_device *ocpdev, int input)
+{
+	if (ocpdev)
+		__zmii_fini(ocpdev, input);
+}
 
-#define ZMII_SCI0	0x40000000
-#define ZMII_FSS0	0x20000000
-#define ZMII_SP0	0x10000000
-#define ZMII_SCI1	0x04000000
-#define ZMII_FSS1	0x02000000
-#define ZMII_SP1	0x01000000
-#define ZMII_SCI2	0x00400000
-#define ZMII_FSS2	0x00200000
-#define ZMII_SP2	0x00100000
-#define ZMII_SCI3	0x00040000
-#define ZMII_FSS3	0x00020000
-#define ZMII_SP3	0x00010000
+void __zmii_enable_mdio(struct ocp_device *ocpdev, int input);
+static inline void zmii_enable_mdio(struct ocp_device *ocpdev, int input)
+{
+	if (ocpdev)
+		__zmii_enable_mdio(ocpdev, input);
+}
 
-#define ZMII_MII0_100MB	ZMII_SP0
-#define ZMII_MII0_10MB	~ZMII_SP0
-#define ZMII_MII1_100MB	ZMII_SP1
-#define ZMII_MII1_10MB	~ZMII_SP1
-#define ZMII_MII2_100MB	ZMII_SP2
-#define ZMII_MII2_10MB	~ZMII_SP2
-#define ZMII_MII3_100MB	ZMII_SP3
-#define ZMII_MII3_10MB	~ZMII_SP3
+void __zmii_set_speed(struct ocp_device *ocpdev, int input, int speed);
+static inline void zmii_set_speed(struct ocp_device *ocpdev, int input,
+				  int speed)
+{
+	if (ocpdev)
+		__zmii_set_speed(ocpdev, input, speed);
+}
 
-/* SMII Status reg */
+int __zmii_get_regs_len(struct ocp_device *ocpdev);
+static inline int zmii_get_regs_len(struct ocp_device *ocpdev)
+{
+	return ocpdev ? __zmii_get_regs_len(ocpdev) : 0;
+}
 
-#define ZMII_STS0 0xFF000000	/* EMAC0 smii status mask */
-#define ZMII_STS1 0x00FF0000	/* EMAC1 smii status mask */
+void *zmii_dump_regs(struct ocp_device *ocpdev, void *buf);
 
-#define SMII	0
-#define RMII	1
-#define MII	2
-#define MDI	3
+#else
+# define zmii_attach(x)		0
+# define zmii_fini(x,y)		((void)0)
+# define zmii_enable_mdio(x,y)	((void)0)
+# define zmii_set_speed(x,y,z)	((void)0)
+# define zmii_get_regs_len(x)	0
+# define zmii_dump_regs(x,buf)	(buf)
+#endif				/* !CONFIG_IBM_EMAC_ZMII */
 
 #endif				/* _IBM_EMAC_ZMII_H_ */