cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/ethernet/natsemi/jazzsonic.c

/*
 * jazzsonic.c
 *
 * (C) 2005 Finn Thain
 *
 * Converted to DMA API, and (from the mac68k project) introduced
 * dhd's support for 16-bit cards.
 *
 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
 *
 * This driver is based on work from Andreas Busse, but most of
 * the code is rewritten.
 *
 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
 *
 * A driver for the onboard Sonic ethernet controller on Mips Jazz
 * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and
 * perhaps others, too)
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/gfp.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>

#include <asm/bootinfo.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/jazz.h>
#include <asm/jazzdma.h>


static char jazz_sonic_string[] = "jazzsonic";


#define SONIC_MEM_SIZE	0x100

#include "sonic.h"

/*
 * Macros to access SONIC registers
 */

#define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))


#define SONIC_WRITE(reg,val)						\
do {                                                                    \
        *((volatile unsigned int *)dev->base_addr+(reg)) = (val);               \
} while (0)


/* use 0 for production, 1 for verification, >1 for debug */
#ifdef SONIC_DEBUG

static unsigned int sonic_debug = SONIC_DEBUG;
#else

static unsigned int sonic_debug = 1;
#endif

/*
 * We cannot use station (ethernet) address prefixes to detect the
 * sonic controller since these are board manufacturer depended.
 * So we check for known Silicon Revision IDs instead.
 */

static unsigned short known_revisions[] =
{
	0x04,			/* Mips Magnum 4000 */
	0xffff			/* end of list */
};


static int jazzsonic_open(struct net_device* dev) { int retval; retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev); if (retval) { printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq); return retval; } retval = sonic_open(dev); if (retval) free_irq(dev->irq, dev); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
Finn Thain4862.34%133.33%
Vasiliy Kulikov2836.36%133.33%
Michael Opdenacker11.30%133.33%
Total77100.00%3100.00%


static int jazzsonic_close(struct net_device* dev) { int err; err = sonic_close(dev); free_irq(dev->irq, dev); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Finn Thain33100.00%1100.00%
Total33100.00%1100.00%

static const struct net_device_ops sonic_netdev_ops = { .ndo_open = jazzsonic_open, .ndo_stop = jazzsonic_close, .ndo_start_xmit = sonic_send_packet, .ndo_get_stats = sonic_get_stats, .ndo_set_rx_mode = sonic_multicast_list, .ndo_tx_timeout = sonic_tx_timeout, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = eth_mac_addr, };
static int sonic_probe1(struct net_device *dev) { static unsigned version_printed; unsigned int silicon_revision; unsigned int val; struct sonic_local *lp = netdev_priv(dev); int err = -ENODEV; int i; if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string)) return -EBUSY; /* * get the Silicon Revision ID. If this is one of the known * one assume that we found a SONIC ethernet controller at * the expected location. */ silicon_revision = SONIC_READ(SONIC_SR); if (sonic_debug > 1) printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision); i = 0; while (known_revisions[i] != 0xffff && known_revisions[i] != silicon_revision) i++; if (known_revisions[i] == 0xffff) { printk("SONIC ethernet controller not found (0x%4x)\n", silicon_revision); goto out; } if (sonic_debug && version_printed++ == 0) printk(version); printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ", dev_name(lp->device), dev->base_addr); /* * Put the sonic into software reset, then * retrieve and print the ethernet address. */ SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); SONIC_WRITE(SONIC_CEP,0); for (i=0; i<3; i++) { val = SONIC_READ(SONIC_CAP0-i); dev->dev_addr[i*2] = val; dev->dev_addr[i*2+1] = val >> 8; } err = -ENOMEM; /* Initialize the device structure. */ lp->dma_bitmode = SONIC_BITMODE32; /* Allocate the entire chunk of memory for the descriptors. Note that this cannot cross a 64K boundary. */ lp->descriptors = dma_alloc_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), &lp->descriptors_laddr, GFP_KERNEL); if (lp->descriptors == NULL) goto out; /* Now set up the pointers to point to the appropriate places */ lp->cda = lp->descriptors; lp->tda = lp->cda + (SIZEOF_SONIC_CDA * SONIC_BUS_SCALE(lp->dma_bitmode)); lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS * SONIC_BUS_SCALE(lp->dma_bitmode)); lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS * SONIC_BUS_SCALE(lp->dma_bitmode)); lp->cda_laddr = lp->descriptors_laddr; lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA * SONIC_BUS_SCALE(lp->dma_bitmode)); lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS * SONIC_BUS_SCALE(lp->dma_bitmode)); lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS * SONIC_BUS_SCALE(lp->dma_bitmode)); dev->netdev_ops = &sonic_netdev_ops; dev->watchdog_timeo = TX_TIMEOUT; /* * clear tally counter */ SONIC_WRITE(SONIC_CRCT,0xffff); SONIC_WRITE(SONIC_FAET,0xffff); SONIC_WRITE(SONIC_MPT,0xffff); return 0; out: release_mem_region(dev->base_addr, SONIC_MEM_SIZE); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Ralf Bächle15032.40%110.00%
Linus Torvalds (pre-git)14330.89%220.00%
Finn Thain11424.62%110.00%
Stephen Hemminger377.99%110.00%
Linus Torvalds71.51%110.00%
Joe Perches61.30%110.00%
Kay Sievers30.65%110.00%
Alexander Beregalov20.43%110.00%
Julia Lawall10.22%110.00%
Total463100.00%10100.00%

/* * Probe for a SONIC ethernet controller on a Mips Jazz board. * Actually probing is superfluous but we're paranoid. */
static int jazz_sonic_probe(struct platform_device *pdev) { struct net_device *dev; struct sonic_local *lp; struct resource *res; int err = 0; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; dev = alloc_etherdev(sizeof(struct sonic_local)); if (!dev) return -ENOMEM; lp = netdev_priv(dev); lp->device = &pdev->dev; SET_NETDEV_DEV(dev, &pdev->dev); platform_set_drvdata(pdev, dev); netdev_boot_setup_check(dev); dev->base_addr = res->start; dev->irq = platform_get_irq(pdev, 0); err = sonic_probe1(dev); if (err) goto out; err = register_netdev(dev); if (err) goto out1; printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq); return 0; out1: release_mem_region(dev->base_addr, SONIC_MEM_SIZE); out: free_netdev(dev); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Ralf Bächle8844.67%110.00%
Finn Thain5427.41%220.00%
Thomas Bogendoerfer2814.21%110.00%
Russell King105.08%110.00%
Linus Torvalds (pre-git)73.55%110.00%
Stephen Hemminger73.55%110.00%
Julia Lawall10.51%110.00%
Joe Perches10.51%110.00%
Johannes Berg10.51%110.00%
Total197100.00%10100.00%

MODULE_DESCRIPTION("Jazz SONIC ethernet driver"); module_param(sonic_debug, int, 0); MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)"); MODULE_ALIAS("platform:jazzsonic"); #include "sonic.c"
static int jazz_sonic_device_remove(struct platform_device *pdev) { struct net_device *dev = platform_get_drvdata(pdev); struct sonic_local* lp = netdev_priv(dev); unregister_netdev(dev); dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), lp->descriptors, lp->descriptors_laddr); release_mem_region(dev->base_addr, SONIC_MEM_SIZE); free_netdev(dev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ralf Bächle3646.75%125.00%
Finn Thain3444.16%125.00%
Russell King67.79%125.00%
Julia Lawall11.30%125.00%
Total77100.00%4100.00%

static struct platform_driver jazz_sonic_driver = { .probe = jazz_sonic_probe, .remove = jazz_sonic_device_remove, .driver = { .name = jazz_sonic_string, }, }; module_platform_driver(jazz_sonic_driver);

Overall Contributors

PersonTokensPropCommitsCommitProp
Finn Thain30828.10%311.11%
Ralf Bächle30828.10%13.70%
Linus Torvalds (pre-git)25222.99%27.41%
Alexander Beregalov494.47%13.70%
Stephen Hemminger444.01%13.70%
Vasiliy Kulikov282.55%13.70%
Russell King282.55%27.41%
Thomas Bogendoerfer282.55%13.70%
Arnaldo Carvalho de Melo90.82%13.70%
Kay Sievers80.73%27.41%
Joe Perches70.64%27.41%
Linus Torvalds70.64%13.70%
Tejun Heo70.64%13.70%
Julia Lawall30.27%13.70%
Jeff Garzik20.18%13.70%
Herbert Xu20.18%13.70%
Axel Lin20.18%13.70%
Michael Opdenacker10.09%13.70%
Johannes Berg10.09%13.70%
Adrian Bunk10.09%13.70%
Jiri Pirko10.09%13.70%
Total1096100.00%27100.00%
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