[linux-block.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/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";

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