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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_change_mtu         = eth_change_mtu,
114         .ndo_validate_addr      = eth_validate_addr,
115         .ndo_set_mac_address    = eth_mac_addr,
116 };
117 
118 static int sonic_probe1(struct net_device *dev)
119 {
120         static unsigned version_printed;
121         unsigned int silicon_revision;
122         unsigned int val;
123         struct sonic_local *lp = netdev_priv(dev);
124         int err = -ENODEV;
125         int i;
126 
127         if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
128                 return -EBUSY;
129 
130         /*
131          * get the Silicon Revision ID. If this is one of the known
132          * one assume that we found a SONIC ethernet controller at
133          * the expected location.
134          */
135         silicon_revision = SONIC_READ(SONIC_SR);
136         if (sonic_debug > 1)
137                 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
138 
139         i = 0;
140         while (known_revisions[i] != 0xffff &&
141                known_revisions[i] != silicon_revision)
142                 i++;
143 
144         if (known_revisions[i] == 0xffff) {
145                 printk("SONIC ethernet controller not found (0x%4x)\n",
146                        silicon_revision);
147                 goto out;
148         }
149 
150         if (sonic_debug  &&  version_printed++ == 0)
151                 printk(version);
152 
153         printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
154                dev_name(lp->device), dev->base_addr);
155 
156         /*
157          * Put the sonic into software reset, then
158          * retrieve and print the ethernet address.
159          */
160         SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
161         SONIC_WRITE(SONIC_CEP,0);
162         for (i=0; i<3; i++) {
163                 val = SONIC_READ(SONIC_CAP0-i);
164                 dev->dev_addr[i*2] = val;
165                 dev->dev_addr[i*2+1] = val >> 8;
166         }
167 
168         err = -ENOMEM;
169 
170         /* Initialize the device structure. */
171 
172         lp->dma_bitmode = SONIC_BITMODE32;
173 
174         /* Allocate the entire chunk of memory for the descriptors.
175            Note that this cannot cross a 64K boundary. */
176         lp->descriptors = dma_alloc_coherent(lp->device,
177                                              SIZEOF_SONIC_DESC *
178                                              SONIC_BUS_SCALE(lp->dma_bitmode),
179                                              &lp->descriptors_laddr,
180                                              GFP_KERNEL);
181         if (lp->descriptors == NULL)
182                 goto out;
183 
184         /* Now set up the pointers to point to the appropriate places */
185         lp->cda = lp->descriptors;
186         lp->tda = lp->cda + (SIZEOF_SONIC_CDA
187                              * SONIC_BUS_SCALE(lp->dma_bitmode));
188         lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
189                              * SONIC_BUS_SCALE(lp->dma_bitmode));
190         lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
191                              * SONIC_BUS_SCALE(lp->dma_bitmode));
192 
193         lp->cda_laddr = lp->descriptors_laddr;
194         lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
195                              * SONIC_BUS_SCALE(lp->dma_bitmode));
196         lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
197                              * SONIC_BUS_SCALE(lp->dma_bitmode));
198         lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
199                              * SONIC_BUS_SCALE(lp->dma_bitmode));
200 
201         dev->netdev_ops = &sonic_netdev_ops;
202         dev->watchdog_timeo = TX_TIMEOUT;
203 
204         /*
205          * clear tally counter
206          */
207         SONIC_WRITE(SONIC_CRCT,0xffff);
208         SONIC_WRITE(SONIC_FAET,0xffff);
209         SONIC_WRITE(SONIC_MPT,0xffff);
210 
211         return 0;
212 out:
213         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
214         return err;
215 }
216 
217 /*
218  * Probe for a SONIC ethernet controller on a Mips Jazz board.
219  * Actually probing is superfluous but we're paranoid.
220  */
221 static int jazz_sonic_probe(struct platform_device *pdev)
222 {
223         struct net_device *dev;
224         struct sonic_local *lp;
225         struct resource *res;
226         int err = 0;
227 
228         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
229         if (!res)
230                 return -ENODEV;
231 
232         dev = alloc_etherdev(sizeof(struct sonic_local));
233         if (!dev)
234                 return -ENOMEM;
235 
236         lp = netdev_priv(dev);
237         lp->device = &pdev->dev;
238         SET_NETDEV_DEV(dev, &pdev->dev);
239         platform_set_drvdata(pdev, dev);
240 
241         netdev_boot_setup_check(dev);
242 
243         dev->base_addr = res->start;
244         dev->irq = platform_get_irq(pdev, 0);
245         err = sonic_probe1(dev);
246         if (err)
247                 goto out;
248         err = register_netdev(dev);
249         if (err)
250                 goto out1;
251 
252         printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
253 
254         return 0;
255 
256 out1:
257         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
258 out:
259         free_netdev(dev);
260 
261         return err;
262 }
263 
264 MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
265 module_param(sonic_debug, int, 0);
266 MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
267 MODULE_ALIAS("platform:jazzsonic");
268 
269 #include "sonic.c"
270 
271 static int jazz_sonic_device_remove(struct platform_device *pdev)
272 {
273         struct net_device *dev = platform_get_drvdata(pdev);
274         struct sonic_local* lp = netdev_priv(dev);
275 
276         unregister_netdev(dev);
277         dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
278                           lp->descriptors, lp->descriptors_laddr);
279         release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
280         free_netdev(dev);
281 
282         return 0;
283 }
284 
285 static struct platform_driver jazz_sonic_driver = {
286         .probe  = jazz_sonic_probe,
287         .remove = jazz_sonic_device_remove,
288         .driver = {
289                 .name   = jazz_sonic_string,
290                 .owner  = THIS_MODULE,
291         },
292 };
293 
294 module_platform_driver(jazz_sonic_driver);
295 

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