cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/ethernet/ibm/emac/tah.c

/*
 * drivers/net/ethernet/ibm/emac/tah.c
 *
 * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
 *
 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
 *                <benh@kernel.crashing.org>
 *
 * Based on the arch/ppc version of the driver:
 *
 * Copyright 2004 MontaVista Software, Inc.
 * Matt Porter <mporter@kernel.crashing.org>
 *
 * Copyright (c) 2005 Eugene Surovegin <ebs@ebshome.net>
 *
 * 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.
 */
#include <linux/of_address.h>
#include <asm/io.h>

#include "emac.h"
#include "core.h"


int tah_attach(struct platform_device *ofdev, int channel) { struct tah_instance *dev = platform_get_drvdata(ofdev); mutex_lock(&dev->lock); /* Reset has been done at probe() time... nothing else to do for now */ ++dev->users; mutex_unlock(&dev->lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson4695.83%133.33%
Grant C. Likely12.08%133.33%
Jingoo Han12.08%133.33%
Total48100.00%3100.00%


void tah_detach(struct platform_device *ofdev, int channel) { struct tah_instance *dev = platform_get_drvdata(ofdev); mutex_lock(&dev->lock); --dev->users; mutex_unlock(&dev->lock); }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson4295.45%133.33%
Grant C. Likely12.27%133.33%
Jingoo Han12.27%133.33%
Total44100.00%3100.00%


void tah_reset(struct platform_device *ofdev) { struct tah_instance *dev = platform_get_drvdata(ofdev); struct tah_regs __iomem *p = dev->base; int n; /* Reset TAH */ out_be32(&p->mr, TAH_MR_SR); n = 100; while ((in_be32(&p->mr) & TAH_MR_SR) && n) --n; if (unlikely(!n)) printk(KERN_ERR "%s: reset timeout\n", ofdev->dev.of_node->full_name); /* 10KB TAH TX FIFO accommodates the max MTU of 9000 */ out_be32(&p->mr, TAH_MR_CVR | TAH_MR_ST_768 | TAH_MR_TFS_10KB | TAH_MR_DTFP | TAH_MR_DIG); }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson10193.52%116.67%
Grant C. Likely43.70%233.33%
Lucas De Marchi10.93%116.67%
Al Viro10.93%116.67%
Jingoo Han10.93%116.67%
Total108100.00%6100.00%


int tah_get_regs_len(struct platform_device *ofdev) { return sizeof(struct emac_ethtool_regs_subhdr) + sizeof(struct tah_regs); }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson2295.65%150.00%
Grant C. Likely14.35%150.00%
Total23100.00%2100.00%


void *tah_dump_regs(struct platform_device *ofdev, void *buf) { struct tah_instance *dev = platform_get_drvdata(ofdev); struct emac_ethtool_regs_subhdr *hdr = buf; struct tah_regs *regs = (struct tah_regs *)(hdr + 1); hdr->version = 0; hdr->index = 0; /* for now, are there chips with more than one * zmii ? if yes, then we'll add a cell_index * like we do for emac */ memcpy_fromio(regs, dev->base, sizeof(struct tah_regs)); return regs + 1; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson7997.53%133.33%
Jingoo Han11.23%133.33%
Grant C. Likely11.23%133.33%
Total81100.00%3100.00%


static int tah_probe(struct platform_device *ofdev) { struct device_node *np = ofdev->dev.of_node; struct tah_instance *dev; struct resource regs; int rc; rc = -ENOMEM; dev = kzalloc(sizeof(struct tah_instance), GFP_KERNEL); if (dev == NULL) goto err_gone; mutex_init(&dev->lock); dev->ofdev = ofdev; rc = -ENXIO; if (of_address_to_resource(np, 0, &regs)) { printk(KERN_ERR "%s: Can't get registers address\n", np->full_name); goto err_free; } rc = -ENOMEM; dev->base = (struct tah_regs __iomem *)ioremap(regs.start, sizeof(struct tah_regs)); if (dev->base == NULL) { printk(KERN_ERR "%s: Can't map device registers!\n", np->full_name); goto err_free; } platform_set_drvdata(ofdev, dev); /* Initialize TAH and enable IPv4 checksum verification, no TSO yet */ tah_reset(ofdev); printk(KERN_INFO "TAH %s initialized\n", ofdev->dev.of_node->full_name); wmb(); return 0; err_free: kfree(dev); err_gone: return rc; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson18892.61%116.67%
Grant C. Likely73.45%233.33%
Valentine Barshak62.96%116.67%
Jingoo Han10.49%116.67%
Al Viro10.49%116.67%
Total203100.00%6100.00%


static int tah_remove(struct platform_device *ofdev) { struct tah_instance *dev = platform_get_drvdata(ofdev); WARN_ON(dev->users != 0); iounmap(dev->base); kfree(dev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson4395.56%133.33%
Jingoo Han12.22%133.33%
Grant C. Likely12.22%133.33%
Total45100.00%3100.00%

static const struct of_device_id tah_match[] = { { .compatible = "ibm,tah", }, /* For backward compat with old DT */ { .type = "tah", }, {}, }; static struct platform_driver tah_driver = { .driver = { .name = "emac-tah", .of_match_table = tah_match, }, .probe = tah_probe, .remove = tah_remove, };
int __init tah_init(void) { return platform_driver_register(&tah_driver); }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson1493.33%150.00%
Grant C. Likely16.67%150.00%
Total15100.00%2100.00%


void tah_exit(void) { platform_driver_unregister(&tah_driver); }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson1292.31%150.00%
Grant C. Likely17.69%150.00%
Total13100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
David Gibson59891.86%17.69%
Grant C. Likely253.84%430.77%
Stefan Roese81.23%17.69%
Valentine Barshak60.92%17.69%
Jingoo Han60.92%17.69%
Rob Herring30.46%17.69%
Al Viro20.31%17.69%
Lucas De Marchi10.15%17.69%
Fabian Frederick10.15%17.69%
Paul Gortmaker10.15%17.69%
Total651100.00%13100.00%
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