2 * drivers/net/ibm_emac/ibm_emac_tah.c
4 * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
6 * Copyright 2004 MontaVista Software, Inc.
7 * Matt Porter <mporter@kernel.crashing.org>
9 * Copyright (c) 2005 Eugene Surovegin <ebs@ebshome.net>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
16 #include <linux/config.h>
19 #include "ibm_emac_core.h"
21 static int __init tah_init(struct ocp_device *ocpdev)
25 if (ocp_get_drvdata(ocpdev)) {
26 printk(KERN_ERR "tah%d: already in use!\n", ocpdev->def->index);
30 /* Initialize TAH and enable IPv4 checksum verification, no TSO yet */
31 p = (struct tah_regs *)ioremap(ocpdev->def->paddr, sizeof(*p));
33 printk(KERN_ERR "tah%d: could not ioremap device registers!\n",
37 ocp_set_drvdata(ocpdev, p);
43 int __init tah_attach(void *emac)
45 struct ocp_enet_private *dev = emac;
46 struct ocp_func_emac_data *emacdata = dev->def->additions;
48 /* Check if we need to attach to a TAH */
49 if (emacdata->tah_idx >= 0) {
50 dev->tah_dev = ocp_find_device(OCP_ANY_ID, OCP_FUNC_TAH,
53 printk(KERN_ERR "emac%d: unknown tah%d!\n",
54 dev->def->index, emacdata->tah_idx);
57 if (tah_init(dev->tah_dev)) {
59 "emac%d: tah%d initialization failed!\n",
60 dev->def->index, emacdata->tah_idx);
67 void __exit __tah_fini(struct ocp_device *ocpdev)
69 struct tah_regs *p = ocp_get_drvdata(ocpdev);
71 ocp_set_drvdata(ocpdev, NULL);
75 void __tah_reset(struct ocp_device *ocpdev)
77 struct tah_regs *p = ocp_get_drvdata(ocpdev);
81 out_be32(&p->mr, TAH_MR_SR);
83 while ((in_be32(&p->mr) & TAH_MR_SR) && n)
87 printk(KERN_ERR "tah%d: reset timeout\n", ocpdev->def->index);
89 /* 10KB TAH TX FIFO accomodates the max MTU of 9000 */
91 TAH_MR_CVR | TAH_MR_ST_768 | TAH_MR_TFS_10KB | TAH_MR_DTFP |
95 int __tah_get_regs_len(struct ocp_device *ocpdev)
97 return sizeof(struct emac_ethtool_regs_subhdr) +
98 sizeof(struct tah_regs);
101 void *tah_dump_regs(struct ocp_device *ocpdev, void *buf)
103 struct tah_regs *dev = ocp_get_drvdata(ocpdev);
104 struct emac_ethtool_regs_subhdr *hdr = buf;
105 struct tah_regs *regs = (struct tah_regs *)(hdr + 1);
108 hdr->index = ocpdev->def->index;
109 memcpy_fromio(regs, dev, sizeof(struct tah_regs));