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[linux-2.6.git] / drivers / net / jazzsonic.c
1 /*
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.
8  *
9  * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
10  *
11  * This driver is based on work from Andreas Busse, but most of
12  * the code is rewritten.
13  *
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/gfp.h>
26 #include <linux/interrupt.h>
27 #include <linux/init.h>
28 #include <linux/ioport.h>
29 #include <linux/in.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>
38 #include <linux/slab.h>
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";
49
50 #define SONIC_MEM_SIZE  0x100
51
52 #include "sonic.h"
53
54 /*
55  * Macros to access SONIC registers
56  */
57 #define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))
58
59 #define SONIC_WRITE(reg,val)                                            \
60 do {                                                                    \
61         *((volatile unsigned int *)dev->base_addr+(reg)) = (val);               \
62 } while (0)
63
64
65 /* use 0 for production, 1 for verification, >1 for debug */
66 #ifdef SONIC_DEBUG
67 static unsigned int sonic_debug = SONIC_DEBUG;
68 #else
69 static unsigned int sonic_debug = 1;
70 #endif
71
72 /*
73  * We cannot use station (ethernet) address prefixes to detect the
74  * sonic controller since these are board manufacturer depended.
75  * So we check for known Silicon Revision IDs instead.
76  */
77 static unsigned short known_revisions[] =
78 {
79         0x04,                   /* Mips Magnum 4000 */
80         0xffff                  /* end of list */
81 };
82
83 static int jazzsonic_open(struct net_device* dev)
84 {
85         if (request_irq(dev->irq, sonic_interrupt, IRQF_DISABLED, "sonic", dev)) {
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
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
112 static int __devinit sonic_probe1(struct net_device *dev)
113 {
114         static unsigned version_printed;
115         unsigned int silicon_revision;
116         unsigned int val;
117         struct sonic_local *lp = netdev_priv(dev);
118         int err = -ENODEV;
119         int i;
120
121         if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
122                 return -EBUSY;
123
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;
134         while (known_revisions[i] != 0xffff &&
135                known_revisions[i] != silicon_revision)
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         }
143
144         if (sonic_debug  &&  version_printed++ == 0)
145                 printk(version);
146
147         printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
148                dev_name(lp->device), dev->base_addr);
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
162         err = -ENOMEM;
163
164         /* Initialize the device structure. */
165
166         lp->dma_bitmode = SONIC_BITMODE32;
167
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) {
173                 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
174                        dev_name(lp->device));
175                 goto out;
176         }
177
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
195         dev->netdev_ops = &sonic_netdev_ops;
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;
206 out:
207         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
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  */
215 static int __devinit jazz_sonic_probe(struct platform_device *pdev)
216 {
217         struct net_device *dev;
218         struct sonic_local *lp;
219         struct resource *res;
220         int err = 0;
221
222         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
223         if (!res)
224                 return -ENODEV;
225
226         dev = alloc_etherdev(sizeof(struct sonic_local));
227         if (!dev)
228                 return -ENOMEM;
229
230         lp = netdev_priv(dev);
231         lp->device = &pdev->dev;
232         SET_NETDEV_DEV(dev, &pdev->dev);
233         platform_set_drvdata(pdev, dev);
234
235         netdev_boot_setup_check(dev);
236
237         dev->base_addr = res->start;
238         dev->irq = platform_get_irq(pdev, 0);
239         err = sonic_probe1(dev);
240         if (err)
241                 goto out;
242         err = register_netdev(dev);
243         if (err)
244                 goto out1;
245
246         printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
247
248         return 0;
249
250 out1:
251         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
252 out:
253         free_netdev(dev);
254
255         return err;
256 }
257
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)");
261 MODULE_ALIAS("platform:jazzsonic");
262
263 #include "sonic.c"
264
265 static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)
266 {
267         struct net_device *dev = platform_get_drvdata(pdev);
268         struct sonic_local* lp = netdev_priv(dev);
269
270         unregister_netdev(dev);
271         dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
272                           lp->descriptors, lp->descriptors_laddr);
273         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
274         free_netdev(dev);
275
276         return 0;
277 }
278
279 static struct platform_driver jazz_sonic_driver = {
280         .probe  = jazz_sonic_probe,
281         .remove = __devexit_p(jazz_sonic_device_remove),
282         .driver = {
283                 .name   = jazz_sonic_string,
284                 .owner  = THIS_MODULE,
285         },
286 };
287
288 static int __init jazz_sonic_init_module(void)
289 {
290         return platform_driver_register(&jazz_sonic_driver);
291 }
292
293 static void __exit jazz_sonic_cleanup_module(void)
294 {
295         platform_driver_unregister(&jazz_sonic_driver);
296 }
297
298 module_init(jazz_sonic_init_module);
299 module_exit(jazz_sonic_cleanup_module);