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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * xtsonic.c
4 *
5 * (C) 2001 - 2007 Tensilica Inc.
6 * Kevin Chea <kchea@yahoo.com>
7 * Marc Gauthier <marc@linux-xtensa.org>
8 * Chris Zankel <chris@zankel.net>
9 *
10 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
11 *
12 * This driver is based on work from Andreas Busse, but most of
13 * the code is rewritten.
14 *
15 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
16 *
17 * A driver for the onboard Sonic ethernet controller on the XT2000.
18 */
19
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/types.h>
23#include <linux/fcntl.h>
24#include <linux/gfp.h>
25#include <linux/interrupt.h>
26#include <linux/init.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#include <linux/pgtable.h>
39
40#include <asm/io.h>
41#include <asm/dma.h>
42
43static char xtsonic_string[] = "xtsonic";
44
45extern unsigned xtboard_nvram_valid(void);
46extern void xtboard_get_ether_addr(unsigned char *buf);
47
48#include "sonic.h"
49
50/*
51 * According to the documentation for the Sonic ethernet controller,
52 * EOBC should be 760 words (1520 bytes) for 32-bit applications, and,
53 * as such, 2 words less than the buffer size. The value for RBSIZE
54 * defined in sonic.h, however is only 1520.
55 *
56 * (Note that in 16-bit configurations, EOBC is 759 words (1518 bytes) and
57 * RBSIZE 1520 bytes)
58 */
59#undef SONIC_RBSIZE
60#define SONIC_RBSIZE 1524
61
62/*
63 * The chip provides 256 byte register space.
64 */
65#define SONIC_MEM_SIZE 0x100
66
67/*
68 * Macros to access SONIC registers
69 */
70#define SONIC_READ(reg) \
71 (0xffff & *((volatile unsigned int *)dev->base_addr+reg))
72
73#define SONIC_WRITE(reg,val) \
74 *((volatile unsigned int *)dev->base_addr+reg) = val
75
76/*
77 * We cannot use station (ethernet) address prefixes to detect the
78 * sonic controller since these are board manufacturer depended.
79 * So we check for known Silicon Revision IDs instead.
80 */
81static unsigned short known_revisions[] =
82{
83 0x101, /* SONIC 83934 */
84 0xffff /* end of list */
85};
86
87static int xtsonic_open(struct net_device *dev)
88{
89 int retval;
90
91 retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev);
92 if (retval) {
93 printk(KERN_ERR "%s: unable to get IRQ %d.\n",
94 dev->name, dev->irq);
95 return -EAGAIN;
96 }
97
98 retval = sonic_open(dev);
99 if (retval)
100 free_irq(dev->irq, dev);
101 return retval;
102}
103
104static int xtsonic_close(struct net_device *dev)
105{
106 int err;
107 err = sonic_close(dev);
108 free_irq(dev->irq, dev);
109 return err;
110}
111
112static const struct net_device_ops xtsonic_netdev_ops = {
113 .ndo_open = xtsonic_open,
114 .ndo_stop = xtsonic_close,
115 .ndo_start_xmit = sonic_send_packet,
116 .ndo_get_stats = sonic_get_stats,
117 .ndo_set_rx_mode = sonic_multicast_list,
118 .ndo_tx_timeout = sonic_tx_timeout,
119 .ndo_validate_addr = eth_validate_addr,
120 .ndo_set_mac_address = eth_mac_addr,
121};
122
123static int sonic_probe1(struct net_device *dev)
124{
125 unsigned int silicon_revision;
126 struct sonic_local *lp = netdev_priv(dev);
127 unsigned int base_addr = dev->base_addr;
128 int i;
129 int err = 0;
130 unsigned char addr[ETH_ALEN];
131
132 if (!request_mem_region(base_addr, 0x100, xtsonic_string))
133 return -EBUSY;
134
135 /*
136 * get the Silicon Revision ID. If this is one of the known
137 * one assume that we found a SONIC ethernet controller at
138 * the expected location.
139 */
140 silicon_revision = SONIC_READ(SONIC_SR);
141 i = 0;
142 while ((known_revisions[i] != 0xffff) &&
143 (known_revisions[i] != silicon_revision))
144 i++;
145
146 if (known_revisions[i] == 0xffff) {
147 pr_info("SONIC ethernet controller not found (0x%4x)\n",
148 silicon_revision);
149 return -ENODEV;
150 }
151
152 /*
153 * Put the sonic into software reset, then retrieve ethernet address.
154 * Note: we are assuming that the boot-loader has initialized the cam.
155 */
156 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
157 SONIC_WRITE(SONIC_DCR,
158 SONIC_DCR_WC0|SONIC_DCR_DW|SONIC_DCR_LBR|SONIC_DCR_SBUS);
159 SONIC_WRITE(SONIC_CEP,0);
160 SONIC_WRITE(SONIC_IMR,0);
161
162 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
163 SONIC_WRITE(SONIC_CEP,0);
164
165 for (i=0; i<3; i++) {
166 unsigned int val = SONIC_READ(SONIC_CAP0-i);
167 addr[i*2] = val;
168 addr[i*2+1] = val >> 8;
169 }
170 eth_hw_addr_set(dev, addr);
171
172 lp->dma_bitmode = SONIC_BITMODE32;
173
174 err = sonic_alloc_descriptors(dev);
175 if (err)
176 goto out;
177
178 dev->netdev_ops = &xtsonic_netdev_ops;
179 dev->watchdog_timeo = TX_TIMEOUT;
180
181 /*
182 * clear tally counter
183 */
184 SONIC_WRITE(SONIC_CRCT,0xffff);
185 SONIC_WRITE(SONIC_FAET,0xffff);
186 SONIC_WRITE(SONIC_MPT,0xffff);
187
188 return 0;
189out:
190 release_region(dev->base_addr, SONIC_MEM_SIZE);
191 return err;
192}
193
194
195/*
196 * Probe for a SONIC ethernet controller on an XT2000 board.
197 * Actually probing is superfluous but we're paranoid.
198 */
199
200int xtsonic_probe(struct platform_device *pdev)
201{
202 struct net_device *dev;
203 struct sonic_local *lp;
204 struct resource *resmem, *resirq;
205 int err = 0;
206
207 if ((resmem = platform_get_resource(pdev, IORESOURCE_MEM, 0)) == NULL)
208 return -ENODEV;
209
210 if ((resirq = platform_get_resource(pdev, IORESOURCE_IRQ, 0)) == NULL)
211 return -ENODEV;
212
213 if ((dev = alloc_etherdev(sizeof(struct sonic_local))) == NULL)
214 return -ENOMEM;
215
216 lp = netdev_priv(dev);
217 lp->device = &pdev->dev;
218 platform_set_drvdata(pdev, dev);
219 SET_NETDEV_DEV(dev, &pdev->dev);
220
221 dev->base_addr = resmem->start;
222 dev->irq = resirq->start;
223
224 if ((err = sonic_probe1(dev)))
225 goto out;
226
227 pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n",
228 dev->base_addr, dev->dev_addr, dev->irq);
229
230 sonic_msg_init(dev);
231
232 if ((err = register_netdev(dev)))
233 goto undo_probe1;
234
235 return 0;
236
237undo_probe1:
238 dma_free_coherent(lp->device,
239 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
240 lp->descriptors, lp->descriptors_laddr);
241 release_region(dev->base_addr, SONIC_MEM_SIZE);
242out:
243 free_netdev(dev);
244
245 return err;
246}
247
248MODULE_DESCRIPTION("Xtensa XT2000 SONIC ethernet driver");
249
250#include "sonic.c"
251
252static void xtsonic_device_remove(struct platform_device *pdev)
253{
254 struct net_device *dev = platform_get_drvdata(pdev);
255 struct sonic_local *lp = netdev_priv(dev);
256
257 unregister_netdev(dev);
258 dma_free_coherent(lp->device,
259 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
260 lp->descriptors, lp->descriptors_laddr);
261 release_region (dev->base_addr, SONIC_MEM_SIZE);
262 free_netdev(dev);
263}
264
265static struct platform_driver xtsonic_driver = {
266 .probe = xtsonic_probe,
267 .remove_new = xtsonic_device_remove,
268 .driver = {
269 .name = xtsonic_string,
270 },
271};
272
273module_platform_driver(xtsonic_driver);
1/*
2 * xtsonic.c
3 *
4 * (C) 2001 - 2007 Tensilica Inc.
5 * Kevin Chea <kchea@yahoo.com>
6 * Marc Gauthier <marc@linux-xtensa.org>
7 * Chris Zankel <chris@zankel.net>
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 the XT2000.
17 */
18
19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/fcntl.h>
23#include <linux/gfp.h>
24#include <linux/interrupt.h>
25#include <linux/init.h>
26#include <linux/ioport.h>
27#include <linux/in.h>
28#include <linux/string.h>
29#include <linux/delay.h>
30#include <linux/errno.h>
31#include <linux/netdevice.h>
32#include <linux/etherdevice.h>
33#include <linux/skbuff.h>
34#include <linux/platform_device.h>
35#include <linux/dma-mapping.h>
36#include <linux/slab.h>
37
38#include <asm/io.h>
39#include <asm/pgtable.h>
40#include <asm/dma.h>
41
42static char xtsonic_string[] = "xtsonic";
43
44extern unsigned xtboard_nvram_valid(void);
45extern void xtboard_get_ether_addr(unsigned char *buf);
46
47#include "sonic.h"
48
49/*
50 * According to the documentation for the Sonic ethernet controller,
51 * EOBC should be 760 words (1520 bytes) for 32-bit applications, and,
52 * as such, 2 words less than the buffer size. The value for RBSIZE
53 * defined in sonic.h, however is only 1520.
54 *
55 * (Note that in 16-bit configurations, EOBC is 759 words (1518 bytes) and
56 * RBSIZE 1520 bytes)
57 */
58#undef SONIC_RBSIZE
59#define SONIC_RBSIZE 1524
60
61/*
62 * The chip provides 256 byte register space.
63 */
64#define SONIC_MEM_SIZE 0x100
65
66/*
67 * Macros to access SONIC registers
68 */
69#define SONIC_READ(reg) \
70 (0xffff & *((volatile unsigned int *)dev->base_addr+reg))
71
72#define SONIC_WRITE(reg,val) \
73 *((volatile unsigned int *)dev->base_addr+reg) = val
74
75
76/* Use 0 for production, 1 for verification, and >2 for debug */
77#ifdef SONIC_DEBUG
78static unsigned int sonic_debug = SONIC_DEBUG;
79#else
80static unsigned int sonic_debug = 1;
81#endif
82
83/*
84 * We cannot use station (ethernet) address prefixes to detect the
85 * sonic controller since these are board manufacturer depended.
86 * So we check for known Silicon Revision IDs instead.
87 */
88static unsigned short known_revisions[] =
89{
90 0x101, /* SONIC 83934 */
91 0xffff /* end of list */
92};
93
94static int xtsonic_open(struct net_device *dev)
95{
96 int retval;
97
98 retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev);
99 if (retval) {
100 printk(KERN_ERR "%s: unable to get IRQ %d.\n",
101 dev->name, dev->irq);
102 return -EAGAIN;
103 }
104
105 retval = sonic_open(dev);
106 if (retval)
107 free_irq(dev->irq, dev);
108 return retval;
109}
110
111static int xtsonic_close(struct net_device *dev)
112{
113 int err;
114 err = sonic_close(dev);
115 free_irq(dev->irq, dev);
116 return err;
117}
118
119static const struct net_device_ops xtsonic_netdev_ops = {
120 .ndo_open = xtsonic_open,
121 .ndo_stop = xtsonic_close,
122 .ndo_start_xmit = sonic_send_packet,
123 .ndo_get_stats = sonic_get_stats,
124 .ndo_set_rx_mode = sonic_multicast_list,
125 .ndo_tx_timeout = sonic_tx_timeout,
126 .ndo_validate_addr = eth_validate_addr,
127 .ndo_set_mac_address = eth_mac_addr,
128};
129
130static int __init sonic_probe1(struct net_device *dev)
131{
132 static unsigned version_printed = 0;
133 unsigned int silicon_revision;
134 struct sonic_local *lp = netdev_priv(dev);
135 unsigned int base_addr = dev->base_addr;
136 int i;
137 int err = 0;
138
139 if (!request_mem_region(base_addr, 0x100, xtsonic_string))
140 return -EBUSY;
141
142 /*
143 * get the Silicon Revision ID. If this is one of the known
144 * one assume that we found a SONIC ethernet controller at
145 * the expected location.
146 */
147 silicon_revision = SONIC_READ(SONIC_SR);
148 if (sonic_debug > 1)
149 printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
150
151 i = 0;
152 while ((known_revisions[i] != 0xffff) &&
153 (known_revisions[i] != silicon_revision))
154 i++;
155
156 if (known_revisions[i] == 0xffff) {
157 printk("SONIC ethernet controller not found (0x%4x)\n",
158 silicon_revision);
159 return -ENODEV;
160 }
161
162 if (sonic_debug && version_printed++ == 0)
163 printk(version);
164
165 /*
166 * Put the sonic into software reset, then retrieve ethernet address.
167 * Note: we are assuming that the boot-loader has initialized the cam.
168 */
169 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
170 SONIC_WRITE(SONIC_DCR,
171 SONIC_DCR_WC0|SONIC_DCR_DW|SONIC_DCR_LBR|SONIC_DCR_SBUS);
172 SONIC_WRITE(SONIC_CEP,0);
173 SONIC_WRITE(SONIC_IMR,0);
174
175 SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
176 SONIC_WRITE(SONIC_CEP,0);
177
178 for (i=0; i<3; i++) {
179 unsigned int val = SONIC_READ(SONIC_CAP0-i);
180 dev->dev_addr[i*2] = val;
181 dev->dev_addr[i*2+1] = val >> 8;
182 }
183
184 /* Initialize the device structure. */
185
186 lp->dma_bitmode = SONIC_BITMODE32;
187
188 /*
189 * Allocate local private descriptor areas in uncached space.
190 * The entire structure must be located within the same 64kb segment.
191 * A simple way to ensure this is to allocate twice the
192 * size of the structure -- given that the structure is
193 * much less than 64 kB, at least one of the halves of
194 * the allocated area will be contained entirely in 64 kB.
195 * We also allocate extra space for a pointer to allow freeing
196 * this structure later on (in xtsonic_cleanup_module()).
197 */
198 lp->descriptors = dma_alloc_coherent(lp->device,
199 SIZEOF_SONIC_DESC *
200 SONIC_BUS_SCALE(lp->dma_bitmode),
201 &lp->descriptors_laddr,
202 GFP_KERNEL);
203 if (lp->descriptors == NULL) {
204 err = -ENOMEM;
205 goto out;
206 }
207
208 lp->cda = lp->descriptors;
209 lp->tda = lp->cda + (SIZEOF_SONIC_CDA
210 * SONIC_BUS_SCALE(lp->dma_bitmode));
211 lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
212 * SONIC_BUS_SCALE(lp->dma_bitmode));
213 lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
214 * SONIC_BUS_SCALE(lp->dma_bitmode));
215
216 /* get the virtual dma address */
217
218 lp->cda_laddr = lp->descriptors_laddr;
219 lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
220 * SONIC_BUS_SCALE(lp->dma_bitmode));
221 lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
222 * SONIC_BUS_SCALE(lp->dma_bitmode));
223 lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
224 * SONIC_BUS_SCALE(lp->dma_bitmode));
225
226 dev->netdev_ops = &xtsonic_netdev_ops;
227 dev->watchdog_timeo = TX_TIMEOUT;
228
229 /*
230 * clear tally counter
231 */
232 SONIC_WRITE(SONIC_CRCT,0xffff);
233 SONIC_WRITE(SONIC_FAET,0xffff);
234 SONIC_WRITE(SONIC_MPT,0xffff);
235
236 return 0;
237out:
238 release_region(dev->base_addr, SONIC_MEM_SIZE);
239 return err;
240}
241
242
243/*
244 * Probe for a SONIC ethernet controller on an XT2000 board.
245 * Actually probing is superfluous but we're paranoid.
246 */
247
248int xtsonic_probe(struct platform_device *pdev)
249{
250 struct net_device *dev;
251 struct sonic_local *lp;
252 struct resource *resmem, *resirq;
253 int err = 0;
254
255 if ((resmem = platform_get_resource(pdev, IORESOURCE_MEM, 0)) == NULL)
256 return -ENODEV;
257
258 if ((resirq = platform_get_resource(pdev, IORESOURCE_IRQ, 0)) == NULL)
259 return -ENODEV;
260
261 if ((dev = alloc_etherdev(sizeof(struct sonic_local))) == NULL)
262 return -ENOMEM;
263
264 lp = netdev_priv(dev);
265 lp->device = &pdev->dev;
266 platform_set_drvdata(pdev, dev);
267 SET_NETDEV_DEV(dev, &pdev->dev);
268 netdev_boot_setup_check(dev);
269
270 dev->base_addr = resmem->start;
271 dev->irq = resirq->start;
272
273 if ((err = sonic_probe1(dev)))
274 goto out;
275 if ((err = register_netdev(dev)))
276 goto out1;
277
278 printk("%s: SONIC ethernet @%08lx, MAC %pM, IRQ %d\n", dev->name,
279 dev->base_addr, dev->dev_addr, dev->irq);
280
281 return 0;
282
283out1:
284 release_region(dev->base_addr, SONIC_MEM_SIZE);
285out:
286 free_netdev(dev);
287
288 return err;
289}
290
291MODULE_DESCRIPTION("Xtensa XT2000 SONIC ethernet driver");
292module_param(sonic_debug, int, 0);
293MODULE_PARM_DESC(sonic_debug, "xtsonic debug level (1-4)");
294
295#include "sonic.c"
296
297static int xtsonic_device_remove(struct platform_device *pdev)
298{
299 struct net_device *dev = platform_get_drvdata(pdev);
300 struct sonic_local *lp = netdev_priv(dev);
301
302 unregister_netdev(dev);
303 dma_free_coherent(lp->device,
304 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
305 lp->descriptors, lp->descriptors_laddr);
306 release_region (dev->base_addr, SONIC_MEM_SIZE);
307 free_netdev(dev);
308
309 return 0;
310}
311
312static struct platform_driver xtsonic_driver = {
313 .probe = xtsonic_probe,
314 .remove = xtsonic_device_remove,
315 .driver = {
316 .name = xtsonic_string,
317 },
318};
319
320module_platform_driver(xtsonic_driver);