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

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