Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Comtrol SV11 card driver | |
3 | * | |
4 | * This is a slightly odd Z85230 synchronous driver. All you need to | |
5 | * know basically is | |
6 | * | |
7 | * Its a genuine Z85230 | |
8 | * | |
9 | * It supports DMA using two DMA channels in SYNC mode. The driver doesn't | |
10 | * use these facilities | |
11 | * | |
12 | * The control port is at io+1, the data at io+3 and turning off the DMA | |
13 | * is done by writing 0 to io+4 | |
14 | * | |
15 | * The hardware does the bus handling to avoid the need for delays between | |
16 | * touching control registers. | |
17 | * | |
18 | * Port B isnt wired (why - beats me) | |
52e8a6a2 KH |
19 | * |
20 | * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl> | |
1da177e4 LT |
21 | */ |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/net.h> | |
27 | #include <linux/skbuff.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/if_arp.h> | |
30 | #include <linux/delay.h> | |
52e8a6a2 | 31 | #include <linux/hdlc.h> |
1da177e4 | 32 | #include <linux/ioport.h> |
5a0e3ad6 | 33 | #include <linux/slab.h> |
1da177e4 LT |
34 | #include <net/arp.h> |
35 | ||
82729971 | 36 | #include <asm/irq.h> |
1da177e4 LT |
37 | #include <asm/io.h> |
38 | #include <asm/dma.h> | |
39 | #include <asm/byteorder.h> | |
1da177e4 LT |
40 | #include "z85230.h" |
41 | ||
42 | static int dma; | |
43 | ||
1da177e4 LT |
44 | /* |
45 | * Network driver support routines | |
46 | */ | |
47 | ||
52e8a6a2 KH |
48 | static inline struct z8530_dev* dev_to_sv(struct net_device *dev) |
49 | { | |
50 | return (struct z8530_dev *)dev_to_hdlc(dev)->priv; | |
51 | } | |
52 | ||
1da177e4 | 53 | /* |
52e8a6a2 | 54 | * Frame receive. Simple for our card as we do HDLC and there |
1da177e4 LT |
55 | * is no funny garbage involved |
56 | */ | |
52e8a6a2 | 57 | |
1da177e4 LT |
58 | static void hostess_input(struct z8530_channel *c, struct sk_buff *skb) |
59 | { | |
60 | /* Drop the CRC - it's not a good idea to try and negotiate it ;) */ | |
52e8a6a2 KH |
61 | skb_trim(skb, skb->len - 2); |
62 | skb->protocol = hdlc_type_trans(skb, c->netdevice); | |
98e399f8 | 63 | skb_reset_mac_header(skb); |
52e8a6a2 | 64 | skb->dev = c->netdevice; |
1da177e4 LT |
65 | /* |
66 | * Send it to the PPP layer. We don't have time to process | |
67 | * it right now. | |
68 | */ | |
69 | netif_rx(skb); | |
1da177e4 | 70 | } |
52e8a6a2 | 71 | |
1da177e4 LT |
72 | /* |
73 | * We've been placed in the UP state | |
52e8a6a2 KH |
74 | */ |
75 | ||
1da177e4 LT |
76 | static int hostess_open(struct net_device *d) |
77 | { | |
52e8a6a2 | 78 | struct z8530_dev *sv11 = dev_to_sv(d); |
1da177e4 | 79 | int err = -1; |
52e8a6a2 | 80 | |
1da177e4 LT |
81 | /* |
82 | * Link layer up | |
83 | */ | |
52e8a6a2 | 84 | switch (dma) { |
1da177e4 | 85 | case 0: |
52e8a6a2 | 86 | err = z8530_sync_open(d, &sv11->chanA); |
1da177e4 LT |
87 | break; |
88 | case 1: | |
52e8a6a2 | 89 | err = z8530_sync_dma_open(d, &sv11->chanA); |
1da177e4 LT |
90 | break; |
91 | case 2: | |
52e8a6a2 | 92 | err = z8530_sync_txdma_open(d, &sv11->chanA); |
1da177e4 LT |
93 | break; |
94 | } | |
52e8a6a2 KH |
95 | |
96 | if (err) | |
1da177e4 | 97 | return err; |
52e8a6a2 KH |
98 | |
99 | err = hdlc_open(d); | |
100 | if (err) { | |
101 | switch (dma) { | |
1da177e4 | 102 | case 0: |
52e8a6a2 | 103 | z8530_sync_close(d, &sv11->chanA); |
1da177e4 LT |
104 | break; |
105 | case 1: | |
52e8a6a2 | 106 | z8530_sync_dma_close(d, &sv11->chanA); |
1da177e4 LT |
107 | break; |
108 | case 2: | |
52e8a6a2 | 109 | z8530_sync_txdma_close(d, &sv11->chanA); |
1da177e4 | 110 | break; |
52e8a6a2 | 111 | } |
1da177e4 LT |
112 | return err; |
113 | } | |
52e8a6a2 KH |
114 | sv11->chanA.rx_function = hostess_input; |
115 | ||
1da177e4 LT |
116 | /* |
117 | * Go go go | |
118 | */ | |
119 | ||
120 | netif_start_queue(d); | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static int hostess_close(struct net_device *d) | |
125 | { | |
52e8a6a2 | 126 | struct z8530_dev *sv11 = dev_to_sv(d); |
1da177e4 LT |
127 | /* |
128 | * Discard new frames | |
129 | */ | |
52e8a6a2 KH |
130 | sv11->chanA.rx_function = z8530_null_rx; |
131 | ||
132 | hdlc_close(d); | |
1da177e4 | 133 | netif_stop_queue(d); |
52e8a6a2 KH |
134 | |
135 | switch (dma) { | |
1da177e4 | 136 | case 0: |
52e8a6a2 | 137 | z8530_sync_close(d, &sv11->chanA); |
1da177e4 LT |
138 | break; |
139 | case 1: | |
52e8a6a2 | 140 | z8530_sync_dma_close(d, &sv11->chanA); |
1da177e4 LT |
141 | break; |
142 | case 2: | |
52e8a6a2 | 143 | z8530_sync_txdma_close(d, &sv11->chanA); |
1da177e4 LT |
144 | break; |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static int hostess_ioctl(struct net_device *d, struct ifreq *ifr, int cmd) | |
150 | { | |
52e8a6a2 KH |
151 | /* struct z8530_dev *sv11=dev_to_sv(d); |
152 | z8530_ioctl(d,&sv11->chanA,ifr,cmd) */ | |
153 | return hdlc_ioctl(d, ifr, cmd); | |
1da177e4 LT |
154 | } |
155 | ||
156 | /* | |
52e8a6a2 | 157 | * Passed network frames, fire them downwind. |
1da177e4 | 158 | */ |
52e8a6a2 | 159 | |
d71a6749 SH |
160 | static netdev_tx_t hostess_queue_xmit(struct sk_buff *skb, |
161 | struct net_device *d) | |
1da177e4 | 162 | { |
52e8a6a2 | 163 | return z8530_queue_xmit(&dev_to_sv(d)->chanA, skb); |
1da177e4 LT |
164 | } |
165 | ||
52e8a6a2 KH |
166 | static int hostess_attach(struct net_device *dev, unsigned short encoding, |
167 | unsigned short parity) | |
1da177e4 | 168 | { |
52e8a6a2 KH |
169 | if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT) |
170 | return 0; | |
171 | return -EINVAL; | |
1da177e4 LT |
172 | } |
173 | ||
174 | /* | |
175 | * Description block for a Comtrol Hostess SV11 card | |
176 | */ | |
52e8a6a2 | 177 | |
991990a1 KH |
178 | static const struct net_device_ops hostess_ops = { |
179 | .ndo_open = hostess_open, | |
180 | .ndo_stop = hostess_close, | |
181 | .ndo_change_mtu = hdlc_change_mtu, | |
182 | .ndo_start_xmit = hdlc_start_xmit, | |
183 | .ndo_do_ioctl = hostess_ioctl, | |
184 | }; | |
185 | ||
52e8a6a2 | 186 | static struct z8530_dev *sv11_init(int iobase, int irq) |
1da177e4 | 187 | { |
52e8a6a2 KH |
188 | struct z8530_dev *sv; |
189 | struct net_device *netdev; | |
1da177e4 LT |
190 | /* |
191 | * Get the needed I/O space | |
192 | */ | |
52e8a6a2 KH |
193 | |
194 | if (!request_region(iobase, 8, "Comtrol SV11")) { | |
195 | printk(KERN_WARNING "hostess: I/O 0x%X already in use.\n", | |
196 | iobase); | |
1da177e4 LT |
197 | return NULL; |
198 | } | |
52e8a6a2 KH |
199 | |
200 | sv = kzalloc(sizeof(struct z8530_dev), GFP_KERNEL); | |
201 | if (!sv) | |
202 | goto err_kzalloc; | |
203 | ||
1da177e4 LT |
204 | /* |
205 | * Stuff in the I/O addressing | |
206 | */ | |
52e8a6a2 KH |
207 | |
208 | sv->active = 0; | |
209 | ||
210 | sv->chanA.ctrlio = iobase + 1; | |
211 | sv->chanA.dataio = iobase + 3; | |
212 | sv->chanB.ctrlio = -1; | |
213 | sv->chanB.dataio = -1; | |
214 | sv->chanA.irqs = &z8530_nop; | |
215 | sv->chanB.irqs = &z8530_nop; | |
216 | ||
217 | outb(0, iobase + 4); /* DMA off */ | |
218 | ||
1da177e4 LT |
219 | /* We want a fast IRQ for this device. Actually we'd like an even faster |
220 | IRQ ;) - This is one driver RtLinux is made for */ | |
52e8a6a2 | 221 | |
a0607fd3 | 222 | if (request_irq(irq, z8530_interrupt, IRQF_DISABLED, |
52e8a6a2 | 223 | "Hostess SV11", sv) < 0) { |
1da177e4 | 224 | printk(KERN_WARNING "hostess: IRQ %d already in use.\n", irq); |
52e8a6a2 | 225 | goto err_irq; |
1da177e4 | 226 | } |
52e8a6a2 KH |
227 | |
228 | sv->irq = irq; | |
229 | sv->chanA.private = sv; | |
230 | sv->chanA.dev = sv; | |
231 | sv->chanB.dev = sv; | |
232 | ||
233 | if (dma) { | |
1da177e4 LT |
234 | /* |
235 | * You can have DMA off or 1 and 3 thats the lot | |
236 | * on the Comtrol. | |
237 | */ | |
52e8a6a2 KH |
238 | sv->chanA.txdma = 3; |
239 | sv->chanA.rxdma = 1; | |
240 | outb(0x03 | 0x08, iobase + 4); /* DMA on */ | |
241 | if (request_dma(sv->chanA.txdma, "Hostess SV/11 (TX)")) | |
242 | goto err_txdma; | |
243 | ||
244 | if (dma == 1) | |
245 | if (request_dma(sv->chanA.rxdma, "Hostess SV/11 (RX)")) | |
246 | goto err_rxdma; | |
1da177e4 LT |
247 | } |
248 | ||
249 | /* Kill our private IRQ line the hostess can end up chattering | |
250 | until the configuration is set */ | |
251 | disable_irq(irq); | |
52e8a6a2 | 252 | |
1da177e4 LT |
253 | /* |
254 | * Begin normal initialise | |
255 | */ | |
52e8a6a2 KH |
256 | |
257 | if (z8530_init(sv)) { | |
1da177e4 LT |
258 | printk(KERN_ERR "Z8530 series device not found.\n"); |
259 | enable_irq(irq); | |
52e8a6a2 | 260 | goto free_dma; |
1da177e4 | 261 | } |
52e8a6a2 KH |
262 | z8530_channel_load(&sv->chanB, z8530_dead_port); |
263 | if (sv->type == Z85C30) | |
264 | z8530_channel_load(&sv->chanA, z8530_hdlc_kilostream); | |
1da177e4 | 265 | else |
52e8a6a2 KH |
266 | z8530_channel_load(&sv->chanA, z8530_hdlc_kilostream_85230); |
267 | ||
1da177e4 | 268 | enable_irq(irq); |
1da177e4 LT |
269 | |
270 | /* | |
271 | * Now we can take the IRQ | |
272 | */ | |
1da177e4 | 273 | |
52e8a6a2 KH |
274 | sv->chanA.netdevice = netdev = alloc_hdlcdev(sv); |
275 | if (!netdev) | |
276 | goto free_dma; | |
1da177e4 | 277 | |
52e8a6a2 KH |
278 | dev_to_hdlc(netdev)->attach = hostess_attach; |
279 | dev_to_hdlc(netdev)->xmit = hostess_queue_xmit; | |
991990a1 | 280 | netdev->netdev_ops = &hostess_ops; |
52e8a6a2 KH |
281 | netdev->base_addr = iobase; |
282 | netdev->irq = irq; | |
283 | ||
284 | if (register_hdlc_device(netdev)) { | |
285 | printk(KERN_ERR "hostess: unable to register HDLC device.\n"); | |
286 | free_netdev(netdev); | |
287 | goto free_dma; | |
1da177e4 | 288 | } |
52e8a6a2 KH |
289 | |
290 | z8530_describe(sv, "I/O", iobase); | |
291 | sv->active = 1; | |
292 | return sv; | |
293 | ||
294 | free_dma: | |
295 | if (dma == 1) | |
296 | free_dma(sv->chanA.rxdma); | |
297 | err_rxdma: | |
298 | if (dma) | |
299 | free_dma(sv->chanA.txdma); | |
300 | err_txdma: | |
301 | free_irq(irq, sv); | |
302 | err_irq: | |
1da177e4 | 303 | kfree(sv); |
52e8a6a2 KH |
304 | err_kzalloc: |
305 | release_region(iobase, 8); | |
1da177e4 LT |
306 | return NULL; |
307 | } | |
308 | ||
52e8a6a2 | 309 | static void sv11_shutdown(struct z8530_dev *dev) |
1da177e4 | 310 | { |
52e8a6a2 KH |
311 | unregister_hdlc_device(dev->chanA.netdevice); |
312 | z8530_shutdown(dev); | |
313 | free_irq(dev->irq, dev); | |
314 | if (dma) { | |
315 | if (dma == 1) | |
316 | free_dma(dev->chanA.rxdma); | |
317 | free_dma(dev->chanA.txdma); | |
1da177e4 | 318 | } |
52e8a6a2 KH |
319 | release_region(dev->chanA.ctrlio - 1, 8); |
320 | free_netdev(dev->chanA.netdevice); | |
1da177e4 LT |
321 | kfree(dev); |
322 | } | |
323 | ||
52e8a6a2 KH |
324 | static int io = 0x200; |
325 | static int irq = 9; | |
1da177e4 LT |
326 | |
327 | module_param(io, int, 0); | |
328 | MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card"); | |
329 | module_param(dma, int, 0); | |
330 | MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX"); | |
331 | module_param(irq, int, 0); | |
332 | MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card"); | |
333 | ||
334 | MODULE_AUTHOR("Alan Cox"); | |
335 | MODULE_LICENSE("GPL"); | |
336 | MODULE_DESCRIPTION("Modular driver for the Comtrol Hostess SV11"); | |
337 | ||
52e8a6a2 | 338 | static struct z8530_dev *sv11_unit; |
1da177e4 LT |
339 | |
340 | int init_module(void) | |
341 | { | |
52e8a6a2 | 342 | if ((sv11_unit = sv11_init(io, irq)) == NULL) |
1da177e4 LT |
343 | return -ENODEV; |
344 | return 0; | |
345 | } | |
346 | ||
347 | void cleanup_module(void) | |
348 | { | |
52e8a6a2 | 349 | if (sv11_unit) |
1da177e4 LT |
350 | sv11_shutdown(sv11_unit); |
351 | } |