drivers/net/jazzsonic.c - linux/kernel/git/davem/net-next - Git at Google

 /*
  * 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/interrupt.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/in.h>
 #include <linux/slab.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 <asm/bootinfo.h>
 #include <asm/system.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";
 static struct platform_device *jazz_sonic_device;

 #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

 /*
  * Base address and interrupt of the SONIC controller on JAZZ boards
  */
 static struct {
 	unsigned int port;
 	unsigned int irq;
 } sonic_portlist[] = { {JAZZ_ETHERNET_BASE, JAZZ_ETHERNET_IRQ}, {0, 0}};

 /*
  * 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 __init 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, ", lp->device->bus_id, 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. */
 	if ((lp->descriptors = dma_alloc_coherent(lp->device,
 				SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 				&lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
 		printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", lp->device->bus_id);
 		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->open = sonic_open;
 	dev->stop = sonic_close;
 	dev->hard_start_xmit = sonic_send_packet;
 	dev->get_stats = sonic_get_stats;
 	dev->set_multicast_list = &sonic_multicast_list;
 	dev->tx_timeout = sonic_tx_timeout;
 	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_region(dev->base_addr, SONIC_MEM_SIZE);
 	return err;
 }

 /*
  * Probe for a SONIC ethernet controller on a Mips Jazz board.
  * Actually probing is superfluous but we're paranoid.
  */
 static int __init jazz_sonic_probe(struct platform_device *pdev)
 {
 	struct net_device *dev;
 	struct sonic_local *lp;
 	int err = 0;
 	int i;

 	/*
 	 * Don't probe if we're not running on a Jazz board.
 	 */
 	if (mips_machgroup != MACH_GROUP_JAZZ)
 		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);
  	SET_MODULE_OWNER(dev);

 	netdev_boot_setup_check(dev);

 	if (dev->base_addr >= KSEG0) { /* Check a single specified location. */
 		err = sonic_probe1(dev);
 	} else if (dev->base_addr != 0) { /* Don't probe at all. */
 		err = -ENXIO;
 	} else {
 		for (i = 0; sonic_portlist[i].port; i++) {
 			dev->base_addr = sonic_portlist[i].port;
 			dev->irq = sonic_portlist[i].irq;
 			if (sonic_probe1(dev) == 0)
 				break;
 		}
 		if (!sonic_portlist[i].port)
 			err = -ENODEV;
 	}
 	if (err)
 		goto out;
 	err = register_netdev(dev);
 	if (err)
 		goto out1;

 	printk("%s: MAC ", dev->name);
 	for (i = 0; i < 6; i++) {
 		printk("%2.2x", dev->dev_addr[i]);
 		if (i < 5)
 			printk(":");
 	}
 	printk(" IRQ %d\n", dev->irq);

 	return 0;

 out1:
 	release_region(dev->base_addr, SONIC_MEM_SIZE);
 out:
 	free_netdev(dev);

 	return err;
 }

 MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
 module_param(sonic_debug, int, 0);
 MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");

 #define SONIC_IRQ_FLAG IRQF_DISABLED

 #include "sonic.c"

 static int __devexit 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_region (dev->base_addr, SONIC_MEM_SIZE);
 	free_netdev (dev);

 	return 0;
 }

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

 static int __init jazz_sonic_init_module(void)
 {
 	int err;

 	if ((err = platform_driver_register(&jazz_sonic_driver))) {
 		printk(KERN_ERR "Driver registration failed\n");
 		return err;
 	}

 	jazz_sonic_device = platform_device_alloc(jazz_sonic_string, 0);
 	if (!jazz_sonic_device)
 		goto out_unregister;

 	if (platform_device_add(jazz_sonic_device)) {
 		platform_device_put(jazz_sonic_device);
 		jazz_sonic_device = NULL;
 	}

 	return 0;

 out_unregister:
 	platform_driver_unregister(&jazz_sonic_driver);

 	return -ENOMEM;
 }

 static void __exit jazz_sonic_cleanup_module(void)
 {
 	platform_driver_unregister(&jazz_sonic_driver);

 	if (jazz_sonic_device) {
 		platform_device_unregister(jazz_sonic_device);
 		jazz_sonic_device = NULL;
 	}
 }

 module_init(jazz_sonic_init_module);
 module_exit(jazz_sonic_cleanup_module);
	/*
	* 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/interrupt.h>
	#include <linux/init.h>
	#include <linux/ioport.h>
	#include <linux/in.h>
	#include <linux/slab.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 <asm/bootinfo.h>
	#include <asm/system.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";
	static struct platform_device *jazz_sonic_device;

	#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

	/*
	* Base address and interrupt of the SONIC controller on JAZZ boards
	*/
	static struct {
	unsigned int port;
	unsigned int irq;
	} sonic_portlist[] = { {JAZZ_ETHERNET_BASE, JAZZ_ETHERNET_IRQ}, {0, 0}};

	/*
	* 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 __init 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, ", lp->device->bus_id, 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. */
	if ((lp->descriptors = dma_alloc_coherent(lp->device,
	SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
	&lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
	printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", lp->device->bus_id);
	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->open = sonic_open;
	dev->stop = sonic_close;
	dev->hard_start_xmit = sonic_send_packet;
	dev->get_stats = sonic_get_stats;
	dev->set_multicast_list = &sonic_multicast_list;
	dev->tx_timeout = sonic_tx_timeout;
	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_region(dev->base_addr, SONIC_MEM_SIZE);
	return err;
	}

	/*
	* Probe for a SONIC ethernet controller on a Mips Jazz board.
	* Actually probing is superfluous but we're paranoid.
	*/
	static int __init jazz_sonic_probe(struct platform_device *pdev)
	{
	struct net_device *dev;
	struct sonic_local *lp;
	int err = 0;
	int i;

	/*
	* Don't probe if we're not running on a Jazz board.
	*/
	if (mips_machgroup != MACH_GROUP_JAZZ)
	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);
	SET_MODULE_OWNER(dev);

	netdev_boot_setup_check(dev);

	if (dev->base_addr >= KSEG0) { /* Check a single specified location. */
	err = sonic_probe1(dev);
	} else if (dev->base_addr != 0) { /* Don't probe at all. */
	err = -ENXIO;
	} else {
	for (i = 0; sonic_portlist[i].port; i++) {
	dev->base_addr = sonic_portlist[i].port;
	dev->irq = sonic_portlist[i].irq;
	if (sonic_probe1(dev) == 0)
	break;
	}
	if (!sonic_portlist[i].port)
	err = -ENODEV;
	}
	if (err)
	goto out;
	err = register_netdev(dev);
	if (err)
	goto out1;

	printk("%s: MAC ", dev->name);
	for (i = 0; i < 6; i++) {
	printk("%2.2x", dev->dev_addr[i]);
	if (i < 5)
	printk(":");
	}
	printk(" IRQ %d\n", dev->irq);

	return 0;

	out1:
	release_region(dev->base_addr, SONIC_MEM_SIZE);
	out:
	free_netdev(dev);

	return err;
	}

	MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
	module_param(sonic_debug, int, 0);
	MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");

	#define SONIC_IRQ_FLAG IRQF_DISABLED

	#include "sonic.c"

	static int __devexit 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_region (dev->base_addr, SONIC_MEM_SIZE);
	free_netdev (dev);

	return 0;
	}

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

	static int __init jazz_sonic_init_module(void)
	{
	int err;

	if ((err = platform_driver_register(&jazz_sonic_driver))) {
	printk(KERN_ERR "Driver registration failed\n");
	return err;
	}

	jazz_sonic_device = platform_device_alloc(jazz_sonic_string, 0);
	if (!jazz_sonic_device)
	goto out_unregister;

	if (platform_device_add(jazz_sonic_device)) {
	platform_device_put(jazz_sonic_device);
	jazz_sonic_device = NULL;
	}

	return 0;

	out_unregister:
	platform_driver_unregister(&jazz_sonic_driver);

	return -ENOMEM;
	}

	static void __exit jazz_sonic_cleanup_module(void)
	{
	platform_driver_unregister(&jazz_sonic_driver);

	if (jazz_sonic_device) {
	platform_device_unregister(jazz_sonic_device);
	jazz_sonic_device = NULL;
	}
	}

	module_init(jazz_sonic_init_module);
	module_exit(jazz_sonic_cleanup_module);