6 * Converted to DMA API, and (from the mac68k project) introduced
7 * dhd's support for 16-bit cards.
9 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
11 * This driver is based on work from Andreas Busse, but most of
12 * the code is rewritten.
14 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
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)
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>
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>
36 #include <linux/platform_device.h>
37 #include <linux/dma-mapping.h>
39 #include <asm/bootinfo.h>
40 #include <asm/system.h>
41 #include <asm/pgtable.h>
45 #include <asm/jazzdma.h>
47 static char jazz_sonic_string
[] = "jazzsonic";
49 #define SONIC_MEM_SIZE 0x100
54 * Macros to access SONIC registers
56 #define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))
58 #define SONIC_WRITE(reg,val) \
60 *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \
64 /* use 0 for production, 1 for verification, >1 for debug */
66 static unsigned int sonic_debug
= SONIC_DEBUG
;
68 static unsigned int sonic_debug
= 1;
72 * We cannot use station (ethernet) address prefixes to detect the
73 * sonic controller since these are board manufacturer depended.
74 * So we check for known Silicon Revision IDs instead.
76 static unsigned short known_revisions
[] =
78 0x04, /* Mips Magnum 4000 */
79 0xffff /* end of list */
82 static int jazzsonic_open(struct net_device
* dev
)
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
);
88 return sonic_open(dev
);
91 static int jazzsonic_close(struct net_device
* dev
)
94 err
= sonic_close(dev
);
95 free_irq(dev
->irq
, dev
);
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
,
111 static int __devinit
sonic_probe1(struct net_device
*dev
)
113 static unsigned version_printed
;
114 unsigned int silicon_revision
;
116 struct sonic_local
*lp
= netdev_priv(dev
);
120 if (!request_mem_region(dev
->base_addr
, SONIC_MEM_SIZE
, jazz_sonic_string
))
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.
128 silicon_revision
= SONIC_READ(SONIC_SR
);
130 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision
);
133 while (known_revisions
[i
] != 0xffff
134 && known_revisions
[i
] != silicon_revision
)
137 if (known_revisions
[i
] == 0xffff) {
138 printk("SONIC ethernet controller not found (0x%4x)\n",
143 if (sonic_debug
&& version_printed
++ == 0)
146 printk(KERN_INFO
"%s: Sonic ethernet found at 0x%08lx, ",
147 dev_name(lp
->device
), dev
->base_addr
);
150 * Put the sonic into software reset, then
151 * retrieve and print the ethernet address.
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;
163 /* Initialize the device structure. */
165 lp
->dma_bitmode
= SONIC_BITMODE32
;
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
) {
172 printk(KERN_ERR
"%s: couldn't alloc DMA memory for descriptors.\n",
173 dev_name(lp
->device
));
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
));
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
));
194 dev
->netdev_ops
= &sonic_netdev_ops
;
195 dev
->watchdog_timeo
= TX_TIMEOUT
;
198 * clear tally counter
200 SONIC_WRITE(SONIC_CRCT
,0xffff);
201 SONIC_WRITE(SONIC_FAET
,0xffff);
202 SONIC_WRITE(SONIC_MPT
,0xffff);
206 release_region(dev
->base_addr
, SONIC_MEM_SIZE
);
211 * Probe for a SONIC ethernet controller on a Mips Jazz board.
212 * Actually probing is superfluous but we're paranoid.
214 static int __devinit
jazz_sonic_probe(struct platform_device
*pdev
)
216 struct net_device
*dev
;
217 struct sonic_local
*lp
;
218 struct resource
*res
;
221 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
225 dev
= alloc_etherdev(sizeof(struct sonic_local
));
229 lp
= netdev_priv(dev
);
230 lp
->device
= &pdev
->dev
;
231 SET_NETDEV_DEV(dev
, &pdev
->dev
);
232 platform_set_drvdata(pdev
, dev
);
234 netdev_boot_setup_check(dev
);
236 dev
->base_addr
= res
->start
;
237 dev
->irq
= platform_get_irq(pdev
, 0);
238 err
= sonic_probe1(dev
);
241 err
= register_netdev(dev
);
245 printk("%s: MAC %pM IRQ %d\n", dev
->name
, dev
->dev_addr
, dev
->irq
);
250 release_region(dev
->base_addr
, SONIC_MEM_SIZE
);
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)");
260 MODULE_ALIAS("platform:jazzsonic");
264 static int __devexit
jazz_sonic_device_remove (struct platform_device
*pdev
)
266 struct net_device
*dev
= platform_get_drvdata(pdev
);
267 struct sonic_local
* lp
= netdev_priv(dev
);
269 unregister_netdev(dev
);
270 dma_free_coherent(lp
->device
, SIZEOF_SONIC_DESC
* SONIC_BUS_SCALE(lp
->dma_bitmode
),
271 lp
->descriptors
, lp
->descriptors_laddr
);
272 release_region (dev
->base_addr
, SONIC_MEM_SIZE
);
278 static struct platform_driver jazz_sonic_driver
= {
279 .probe
= jazz_sonic_probe
,
280 .remove
= __devexit_p(jazz_sonic_device_remove
),
282 .name
= jazz_sonic_string
,
283 .owner
= THIS_MODULE
,
287 static int __init
jazz_sonic_init_module(void)
289 return platform_driver_register(&jazz_sonic_driver
);
292 static void __exit
jazz_sonic_cleanup_module(void)
294 platform_driver_unregister(&jazz_sonic_driver
);
297 module_init(jazz_sonic_init_module
);
298 module_exit(jazz_sonic_cleanup_module
);