Root/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/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>
36#include <linux/platform_device.h>
37#include <linux/dma-mapping.h>
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
47static char jazz_sonic_string[] = "jazzsonic";
48
49#define SONIC_MEM_SIZE 0x100
50
51#include "sonic.h"
52
53/*
54 * Macros to access SONIC registers
55 */
56#define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))
57
58#define SONIC_WRITE(reg,val) \
59do { \
60    *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \
61} while (0)
62
63
64/* use 0 for production, 1 for verification, >1 for debug */
65#ifdef SONIC_DEBUG
66static unsigned int sonic_debug = SONIC_DEBUG;
67#else
68static unsigned int sonic_debug = 1;
69#endif
70
71/*
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.
75 */
76static unsigned short known_revisions[] =
77{
78    0x04, /* Mips Magnum 4000 */
79    0xffff /* end of list */
80};
81
82static 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
91static 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
99static 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
111static int __init sonic_probe1(struct net_device *dev)
112{
113    static unsigned version_printed;
114    unsigned int silicon_revision;
115    unsigned int val;
116    struct sonic_local *lp = netdev_priv(dev);
117    int err = -ENODEV;
118    int i;
119
120    if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
121        return -EBUSY;
122
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    }
142
143    if (sonic_debug && version_printed++ == 0)
144        printk(version);
145
146    printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
147           dev_name(lp->device), dev->base_addr);
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
161    err = -ENOMEM;
162
163    /* Initialize the device structure. */
164
165    lp->dma_bitmode = SONIC_BITMODE32;
166
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));
174        goto out;
175    }
176
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
194    dev->netdev_ops = &sonic_netdev_ops;
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;
205out:
206    release_region(dev->base_addr, SONIC_MEM_SIZE);
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 */
214static int __init jazz_sonic_probe(struct platform_device *pdev)
215{
216    struct net_device *dev;
217    struct sonic_local *lp;
218    struct resource *res;
219    int err = 0;
220
221    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
222    if (!res)
223        return -ENODEV;
224
225    dev = alloc_etherdev(sizeof(struct sonic_local));
226    if (!dev)
227        return -ENOMEM;
228
229    lp = netdev_priv(dev);
230    lp->device = &pdev->dev;
231    SET_NETDEV_DEV(dev, &pdev->dev);
232    platform_set_drvdata(pdev, dev);
233
234    netdev_boot_setup_check(dev);
235
236    dev->base_addr = res->start;
237    dev->irq = platform_get_irq(pdev, 0);
238    err = sonic_probe1(dev);
239    if (err)
240        goto out;
241    err = register_netdev(dev);
242    if (err)
243        goto out1;
244
245    printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
246
247    return 0;
248
249out1:
250    release_region(dev->base_addr, SONIC_MEM_SIZE);
251out:
252    free_netdev(dev);
253
254    return err;
255}
256
257MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
258module_param(sonic_debug, int, 0);
259MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
260MODULE_ALIAS("platform:jazzsonic");
261
262#include "sonic.c"
263
264static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)
265{
266    struct net_device *dev = platform_get_drvdata(pdev);
267    struct sonic_local* lp = netdev_priv(dev);
268
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);
273    free_netdev(dev);
274
275    return 0;
276}
277
278static struct platform_driver jazz_sonic_driver = {
279    .probe = jazz_sonic_probe,
280    .remove = __devexit_p(jazz_sonic_device_remove),
281    .driver = {
282        .name = jazz_sonic_string,
283        .owner = THIS_MODULE,
284    },
285};
286
287static int __init jazz_sonic_init_module(void)
288{
289    return platform_driver_register(&jazz_sonic_driver);
290}
291
292static void __exit jazz_sonic_cleanup_module(void)
293{
294    platform_driver_unregister(&jazz_sonic_driver);
295}
296
297module_init(jazz_sonic_init_module);
298module_exit(jazz_sonic_cleanup_module);
299

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