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