[mirror_ubuntu-artful-kernel.git] / drivers / net / 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/init.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/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";

#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)
{
	if (request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED, "sonic", dev)) {
		printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq);
		return -EAGAIN;
	}
	return sonic_open(dev);
}

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

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_multicast_list	= sonic_multicast_list,
	.ndo_tx_timeout		= sonic_tx_timeout,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= eth_mac_addr,
};

static int __devinit 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. */
	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",
		       dev_name(lp->device));
		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;
}

/*
 * Probe for a SONIC ethernet controller on a Mips Jazz board.
 * Actually probing is superfluous but we're paranoid.
 */
static int __devinit 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;
}

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 __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_mem_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,
		.owner	= THIS_MODULE,
	},
};

static int __init jazz_sonic_init_module(void)
{
	return platform_driver_register(&jazz_sonic_driver);
}

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

module_init(jazz_sonic_init_module);
module_exit(jazz_sonic_cleanup_module);
Commit	Line	Data
1da177e4	1	/*
efcce839 FT	2	* jazzsonic.c
	3	*
	4	* (C) 2005 Finn Thain
	5	*
	6	* Converted to DMA API, and (from the mac68k project) introduced
	7	* dhd's support for 16-bit cards.
1da177e4 LT	8	*
1da177e4 LT	9	* (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
6aa20a22	10	*
1da177e4 LT	11	* This driver is based on work from Andreas Busse, but most of
1da177e4 LT	12	* the code is rewritten.
6aa20a22	13	*
1da177e4 LT	14	* (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
	15	*
	16	* A driver for the onboard Sonic ethernet controller on Mips Jazz
	17	* systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and
	18	* perhaps others, too)
	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/types.h>
	24	#include <linux/fcntl.h>
5a0e3ad6	25	#include <linux/gfp.h>
1da177e4 LT	26	#include <linux/interrupt.h>
	27	#include <linux/init.h>
	28	#include <linux/ioport.h>
	29	#include <linux/in.h>
1da177e4 LT	30	#include <linux/string.h>
	31	#include <linux/delay.h>
	32	#include <linux/errno.h>
	33	#include <linux/netdevice.h>
	34	#include <linux/etherdevice.h>
	35	#include <linux/skbuff.h>
d052d1be	36	#include <linux/platform_device.h>
efcce839	37	#include <linux/dma-mapping.h>
5a0e3ad6	38	#include <linux/slab.h>
1da177e4 LT	39
	40	#include <asm/bootinfo.h>
	41	#include <asm/system.h>
	42	#include <asm/pgtable.h>
	43	#include <asm/io.h>
	44	#include <asm/dma.h>
	45	#include <asm/jazz.h>
	46	#include <asm/jazzdma.h>
	47
	48	static char jazz_sonic_string[] = "jazzsonic";
1da177e4 LT	49
	50	#define SONIC_MEM_SIZE 0x100
	51
1da177e4 LT	52	#include "sonic.h"
	53
	54	/*
	55	* Macros to access SONIC registers
	56	*/
efcce839	57	#define SONIC_READ(reg) (((volatile unsigned int )dev->base_addr+reg))
1da177e4 LT	58
	59	#define SONIC_WRITE(reg,val) \
	60	do { \
efcce839	61	((volatile unsigned int )dev->base_addr+(reg)) = (val); \
1da177e4 LT	62	} while (0)
	63
	64
efcce839	65	/* use 0 for production, 1 for verification, >1 for debug */
1da177e4 LT	66	#ifdef SONIC_DEBUG
1da177e4 LT	67	static unsigned int sonic_debug = SONIC_DEBUG;
6aa20a22	68	#else
1da177e4 LT	69	static unsigned int sonic_debug = 1;
	70	#endif
	71
1da177e4 LT	72	/*
	73	* We cannot use station (ethernet) address prefixes to detect the
	74	* sonic controller since these are board manufacturer depended.
6aa20a22	75	* So we check for known Silicon Revision IDs instead.
1da177e4 LT	76	*/
	77	static unsigned short known_revisions[] =
	78	{
	79	0x04, /* Mips Magnum 4000 */
	80	0xffff /* end of list */
	81	};
	82
f4d86754 FT	83	static int jazzsonic_open(struct net_device* dev)
f4d86754 FT	84	{
a0607fd3	85	if (request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED, "sonic", dev)) {
f4d86754 FT	86	printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq);
	87	return -EAGAIN;
	88	}
	89	return sonic_open(dev);
	90	}
	91
	92	static int jazzsonic_close(struct net_device* dev)
	93	{
	94	int err;
	95	err = sonic_close(dev);
	96	free_irq(dev->irq, dev);
	97	return err;
	98	}
	99
502a326f AB	100	static const struct net_device_ops sonic_netdev_ops = {
	101	.ndo_open = jazzsonic_open,
	102	.ndo_stop = jazzsonic_close,
	103	.ndo_start_xmit = sonic_send_packet,
	104	.ndo_get_stats = sonic_get_stats,
	105	.ndo_set_multicast_list = sonic_multicast_list,
	106	.ndo_tx_timeout = sonic_tx_timeout,
	107	.ndo_change_mtu = eth_change_mtu,
	108	.ndo_validate_addr = eth_validate_addr,
	109	.ndo_set_mac_address = eth_mac_addr,
	110	};
	111
2e76baea	112	static int __devinit sonic_probe1(struct net_device *dev)
1da177e4 LT	113	{
	114	static unsigned version_printed;
	115	unsigned int silicon_revision;
	116	unsigned int val;
efcce839	117	struct sonic_local *lp = netdev_priv(dev);
1da177e4 LT	118	int err = -ENODEV;
	119	int i;
	120
efcce839	121	if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
1da177e4	122	return -EBUSY;
efcce839	123
1da177e4 LT	124	/*
	125	* get the Silicon Revision ID. If this is one of the known
	126	* one assume that we found a SONIC ethernet controller at
	127	* the expected location.
	128	*/
	129	silicon_revision = SONIC_READ(SONIC_SR);
	130	if (sonic_debug > 1)
	131	printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
	132
	133	i = 0;
8e95a202 JP	134	while (known_revisions[i] != 0xffff &&
8e95a202 JP	135	known_revisions[i] != silicon_revision)
1da177e4 LT	136	i++;
	137
	138	if (known_revisions[i] == 0xffff) {
	139	printk("SONIC ethernet controller not found (0x%4x)\n",
	140	silicon_revision);
	141	goto out;
	142	}
6aa20a22	143
1da177e4 LT	144	if (sonic_debug && version_printed++ == 0)
	145	printk(version);
	146
c2313557 KS	147	printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
c2313557 KS	148	dev_name(lp->device), dev->base_addr);
1da177e4 LT	149
	150	/*
	151	* Put the sonic into software reset, then
	152	* retrieve and print the ethernet address.
	153	*/
	154	SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
	155	SONIC_WRITE(SONIC_CEP,0);
	156	for (i=0; i<3; i++) {
	157	val = SONIC_READ(SONIC_CAP0-i);
	158	dev->dev_addr[i*2] = val;
	159	dev->dev_addr[i*2+1] = val >> 8;
	160	}
	161
1da177e4	162	err = -ENOMEM;
6aa20a22	163
1da177e4	164	/* Initialize the device structure. */
1da177e4	165
efcce839	166	lp->dma_bitmode = SONIC_BITMODE32;
1da177e4	167
efcce839 FT	168	/* Allocate the entire chunk of memory for the descriptors.
	169	Note that this cannot cross a 64K boundary. */
	170	if ((lp->descriptors = dma_alloc_coherent(lp->device,
	171	SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
	172	&lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
c2313557 KS	173	printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
c2313557 KS	174	dev_name(lp->device));
efcce839	175	goto out;
1da177e4 LT	176	}
1da177e4 LT	177
efcce839 FT	178	/* Now set up the pointers to point to the appropriate places */
	179	lp->cda = lp->descriptors;
	180	lp->tda = lp->cda + (SIZEOF_SONIC_CDA
	181	* SONIC_BUS_SCALE(lp->dma_bitmode));
	182	lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
	183	* SONIC_BUS_SCALE(lp->dma_bitmode));
	184	lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
	185	* SONIC_BUS_SCALE(lp->dma_bitmode));
	186
	187	lp->cda_laddr = lp->descriptors_laddr;
	188	lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
	189	* SONIC_BUS_SCALE(lp->dma_bitmode));
	190	lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
	191	* SONIC_BUS_SCALE(lp->dma_bitmode));
	192	lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
	193	* SONIC_BUS_SCALE(lp->dma_bitmode));
	194
502a326f	195	dev->netdev_ops = &sonic_netdev_ops;
1da177e4 LT	196	dev->watchdog_timeo = TX_TIMEOUT;
	197
	198	/*
	199	* clear tally counter
	200	*/
	201	SONIC_WRITE(SONIC_CRCT,0xffff);
	202	SONIC_WRITE(SONIC_FAET,0xffff);
	203	SONIC_WRITE(SONIC_MPT,0xffff);
	204
	205	return 0;
1da177e4	206	out:
c9145a2d	207	release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
1da177e4 LT	208	return err;
	209	}
	210
	211	/*
	212	* Probe for a SONIC ethernet controller on a Mips Jazz board.
	213	* Actually probing is superfluous but we're paranoid.
	214	*/
2e76baea	215	static int __devinit jazz_sonic_probe(struct platform_device *pdev)
1da177e4 LT	216	{
	217	struct net_device *dev;
	218	struct sonic_local *lp;
ed9f0e0b	219	struct resource *res;
1da177e4	220	int err = 0;
1da177e4	221
ed9f0e0b TB	222	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ed9f0e0b TB	223	if (!res)
1da177e4 LT	224	return -ENODEV;
1da177e4 LT	225
efcce839	226	dev = alloc_etherdev(sizeof(struct sonic_local));
1da177e4 LT	227	if (!dev)
	228	return -ENOMEM;
	229
efcce839	230	lp = netdev_priv(dev);
3ae5eaec RK	231	lp->device = &pdev->dev;
3ae5eaec RK	232	SET_NETDEV_DEV(dev, &pdev->dev);
4564cba7	233	platform_set_drvdata(pdev, dev);
efcce839	234
1da177e4	235	netdev_boot_setup_check(dev);
1da177e4	236
ed9f0e0b TB	237	dev->base_addr = res->start;
	238	dev->irq = platform_get_irq(pdev, 0);
	239	err = sonic_probe1(dev);
1da177e4 LT	240	if (err)
	241	goto out;
	242	err = register_netdev(dev);
	243	if (err)
	244	goto out1;
	245
e174961c	246	printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
efcce839	247
1da177e4 LT	248	return 0;
	249
	250	out1:
c9145a2d	251	release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
1da177e4 LT	252	out:
	253	free_netdev(dev);
	254
	255	return err;
	256	}
	257
efcce839 FT	258	MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
	259	module_param(sonic_debug, int, 0);
	260	MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
72abb461	261	MODULE_ALIAS("platform:jazzsonic");
1da177e4	262
1da177e4 LT	263	#include "sonic.c"
1da177e4 LT	264
3ae5eaec	265	static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)
1da177e4	266	{
3ae5eaec	267	struct net_device *dev = platform_get_drvdata(pdev);
efcce839	268	struct sonic_local* lp = netdev_priv(dev);
1da177e4	269
d74472f0	270	unregister_netdev(dev);
efcce839 FT	271	dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
efcce839 FT	272	lp->descriptors, lp->descriptors_laddr);
c9145a2d	273	release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
d74472f0	274	free_netdev(dev);
1da177e4 LT	275
	276	return 0;
	277	}
	278
3ae5eaec	279	static struct platform_driver jazz_sonic_driver = {
1da177e4 LT	280	.probe = jazz_sonic_probe,
1da177e4 LT	281	.remove = __devexit_p(jazz_sonic_device_remove),
3ae5eaec RK	282	.driver = {
3ae5eaec RK	283	.name = jazz_sonic_string,
72abb461	284	.owner = THIS_MODULE,
3ae5eaec	285	},
1da177e4	286	};
efcce839	287
1da177e4 LT	288	static int __init jazz_sonic_init_module(void)
1da177e4 LT	289	{
ed9f0e0b	290	return platform_driver_register(&jazz_sonic_driver);
1da177e4 LT	291	}
	292
	293	static void __exit jazz_sonic_cleanup_module(void)
	294	{
3ae5eaec	295	platform_driver_unregister(&jazz_sonic_driver);
1da177e4 LT	296	}
	297
	298	module_init(jazz_sonic_init_module);
	299	module_exit(jazz_sonic_cleanup_module);