Commit | Line | Data |
---|---|---|
09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * Comtrol SV11 card driver | |
4 | * | |
5 | * This is a slightly odd Z85230 synchronous driver. All you need to | |
6 | * know basically is | |
7 | * | |
8 | * Its a genuine Z85230 | |
9 | * | |
10 | * It supports DMA using two DMA channels in SYNC mode. The driver doesn't | |
11 | * use these facilities | |
12 | * | |
13 | * The control port is at io+1, the data at io+3 and turning off the DMA | |
14 | * is done by writing 0 to io+4 | |
15 | * | |
16 | * The hardware does the bus handling to avoid the need for delays between | |
17 | * touching control registers. | |
18 | * | |
25985edc | 19 | * Port B isn't wired (why - beats me) |
52e8a6a2 KH |
20 | * |
21 | * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl> | |
1da177e4 LT |
22 | */ |
23 | ||
23efcb73 JP |
24 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
25 | ||
1da177e4 LT |
26 | #include <linux/module.h> |
27 | #include <linux/kernel.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/net.h> | |
30 | #include <linux/skbuff.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/if_arp.h> | |
33 | #include <linux/delay.h> | |
52e8a6a2 | 34 | #include <linux/hdlc.h> |
1da177e4 | 35 | #include <linux/ioport.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
1da177e4 LT |
37 | #include <net/arp.h> |
38 | ||
82729971 | 39 | #include <asm/irq.h> |
1da177e4 LT |
40 | #include <asm/io.h> |
41 | #include <asm/dma.h> | |
42 | #include <asm/byteorder.h> | |
1da177e4 LT |
43 | #include "z85230.h" |
44 | ||
45 | static int dma; | |
46 | ||
1da177e4 LT |
47 | /* |
48 | * Network driver support routines | |
49 | */ | |
50 | ||
52e8a6a2 KH |
51 | static inline struct z8530_dev* dev_to_sv(struct net_device *dev) |
52 | { | |
53 | return (struct z8530_dev *)dev_to_hdlc(dev)->priv; | |
54 | } | |
55 | ||
1da177e4 | 56 | /* |
52e8a6a2 | 57 | * Frame receive. Simple for our card as we do HDLC and there |
1da177e4 LT |
58 | * is no funny garbage involved |
59 | */ | |
52e8a6a2 | 60 | |
1da177e4 LT |
61 | static void hostess_input(struct z8530_channel *c, struct sk_buff *skb) |
62 | { | |
63 | /* Drop the CRC - it's not a good idea to try and negotiate it ;) */ | |
52e8a6a2 KH |
64 | skb_trim(skb, skb->len - 2); |
65 | skb->protocol = hdlc_type_trans(skb, c->netdevice); | |
98e399f8 | 66 | skb_reset_mac_header(skb); |
52e8a6a2 | 67 | skb->dev = c->netdevice; |
1da177e4 LT |
68 | /* |
69 | * Send it to the PPP layer. We don't have time to process | |
70 | * it right now. | |
71 | */ | |
72 | netif_rx(skb); | |
1da177e4 | 73 | } |
52e8a6a2 | 74 | |
1da177e4 LT |
75 | /* |
76 | * We've been placed in the UP state | |
52e8a6a2 KH |
77 | */ |
78 | ||
1da177e4 LT |
79 | static int hostess_open(struct net_device *d) |
80 | { | |
52e8a6a2 | 81 | struct z8530_dev *sv11 = dev_to_sv(d); |
1da177e4 | 82 | int err = -1; |
52e8a6a2 | 83 | |
1da177e4 LT |
84 | /* |
85 | * Link layer up | |
86 | */ | |
52e8a6a2 | 87 | switch (dma) { |
1da177e4 | 88 | case 0: |
52e8a6a2 | 89 | err = z8530_sync_open(d, &sv11->chanA); |
1da177e4 LT |
90 | break; |
91 | case 1: | |
52e8a6a2 | 92 | err = z8530_sync_dma_open(d, &sv11->chanA); |
1da177e4 LT |
93 | break; |
94 | case 2: | |
52e8a6a2 | 95 | err = z8530_sync_txdma_open(d, &sv11->chanA); |
1da177e4 LT |
96 | break; |
97 | } | |
52e8a6a2 KH |
98 | |
99 | if (err) | |
1da177e4 | 100 | return err; |
52e8a6a2 KH |
101 | |
102 | err = hdlc_open(d); | |
103 | if (err) { | |
104 | switch (dma) { | |
1da177e4 | 105 | case 0: |
52e8a6a2 | 106 | z8530_sync_close(d, &sv11->chanA); |
1da177e4 LT |
107 | break; |
108 | case 1: | |
52e8a6a2 | 109 | z8530_sync_dma_close(d, &sv11->chanA); |
1da177e4 LT |
110 | break; |
111 | case 2: | |
52e8a6a2 | 112 | z8530_sync_txdma_close(d, &sv11->chanA); |
1da177e4 | 113 | break; |
52e8a6a2 | 114 | } |
1da177e4 LT |
115 | return err; |
116 | } | |
52e8a6a2 KH |
117 | sv11->chanA.rx_function = hostess_input; |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Go go go | |
121 | */ | |
122 | ||
123 | netif_start_queue(d); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static int hostess_close(struct net_device *d) | |
128 | { | |
52e8a6a2 | 129 | struct z8530_dev *sv11 = dev_to_sv(d); |
1da177e4 LT |
130 | /* |
131 | * Discard new frames | |
132 | */ | |
52e8a6a2 KH |
133 | sv11->chanA.rx_function = z8530_null_rx; |
134 | ||
135 | hdlc_close(d); | |
1da177e4 | 136 | netif_stop_queue(d); |
52e8a6a2 KH |
137 | |
138 | switch (dma) { | |
1da177e4 | 139 | case 0: |
52e8a6a2 | 140 | z8530_sync_close(d, &sv11->chanA); |
1da177e4 LT |
141 | break; |
142 | case 1: | |
52e8a6a2 | 143 | z8530_sync_dma_close(d, &sv11->chanA); |
1da177e4 LT |
144 | break; |
145 | case 2: | |
52e8a6a2 | 146 | z8530_sync_txdma_close(d, &sv11->chanA); |
1da177e4 LT |
147 | break; |
148 | } | |
149 | return 0; | |
150 | } | |
151 | ||
152 | static int hostess_ioctl(struct net_device *d, struct ifreq *ifr, int cmd) | |
153 | { | |
52e8a6a2 KH |
154 | /* struct z8530_dev *sv11=dev_to_sv(d); |
155 | z8530_ioctl(d,&sv11->chanA,ifr,cmd) */ | |
156 | return hdlc_ioctl(d, ifr, cmd); | |
1da177e4 LT |
157 | } |
158 | ||
159 | /* | |
52e8a6a2 | 160 | * Passed network frames, fire them downwind. |
1da177e4 | 161 | */ |
52e8a6a2 | 162 | |
d71a6749 SH |
163 | static netdev_tx_t hostess_queue_xmit(struct sk_buff *skb, |
164 | struct net_device *d) | |
1da177e4 | 165 | { |
52e8a6a2 | 166 | return z8530_queue_xmit(&dev_to_sv(d)->chanA, skb); |
1da177e4 LT |
167 | } |
168 | ||
52e8a6a2 KH |
169 | static int hostess_attach(struct net_device *dev, unsigned short encoding, |
170 | unsigned short parity) | |
1da177e4 | 171 | { |
52e8a6a2 KH |
172 | if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT) |
173 | return 0; | |
174 | return -EINVAL; | |
1da177e4 LT |
175 | } |
176 | ||
177 | /* | |
178 | * Description block for a Comtrol Hostess SV11 card | |
179 | */ | |
52e8a6a2 | 180 | |
991990a1 KH |
181 | static const struct net_device_ops hostess_ops = { |
182 | .ndo_open = hostess_open, | |
183 | .ndo_stop = hostess_close, | |
991990a1 KH |
184 | .ndo_start_xmit = hdlc_start_xmit, |
185 | .ndo_do_ioctl = hostess_ioctl, | |
186 | }; | |
187 | ||
52e8a6a2 | 188 | static struct z8530_dev *sv11_init(int iobase, int irq) |
1da177e4 | 189 | { |
52e8a6a2 KH |
190 | struct z8530_dev *sv; |
191 | struct net_device *netdev; | |
1da177e4 LT |
192 | /* |
193 | * Get the needed I/O space | |
194 | */ | |
52e8a6a2 KH |
195 | |
196 | if (!request_region(iobase, 8, "Comtrol SV11")) { | |
23efcb73 | 197 | pr_warn("I/O 0x%X already in use\n", iobase); |
1da177e4 LT |
198 | return NULL; |
199 | } | |
52e8a6a2 KH |
200 | |
201 | sv = kzalloc(sizeof(struct z8530_dev), GFP_KERNEL); | |
202 | if (!sv) | |
203 | goto err_kzalloc; | |
204 | ||
1da177e4 LT |
205 | /* |
206 | * Stuff in the I/O addressing | |
207 | */ | |
52e8a6a2 KH |
208 | |
209 | sv->active = 0; | |
210 | ||
211 | sv->chanA.ctrlio = iobase + 1; | |
212 | sv->chanA.dataio = iobase + 3; | |
213 | sv->chanB.ctrlio = -1; | |
214 | sv->chanB.dataio = -1; | |
215 | sv->chanA.irqs = &z8530_nop; | |
216 | sv->chanB.irqs = &z8530_nop; | |
217 | ||
218 | outb(0, iobase + 4); /* DMA off */ | |
219 | ||
1da177e4 LT |
220 | /* We want a fast IRQ for this device. Actually we'd like an even faster |
221 | IRQ ;) - This is one driver RtLinux is made for */ | |
52e8a6a2 | 222 | |
0ca45208 | 223 | if (request_irq(irq, z8530_interrupt, 0, |
52e8a6a2 | 224 | "Hostess SV11", sv) < 0) { |
23efcb73 | 225 | pr_warn("IRQ %d already in use\n", irq); |
52e8a6a2 | 226 | goto err_irq; |
1da177e4 | 227 | } |
52e8a6a2 KH |
228 | |
229 | sv->irq = irq; | |
230 | sv->chanA.private = sv; | |
231 | sv->chanA.dev = sv; | |
232 | sv->chanB.dev = sv; | |
233 | ||
234 | if (dma) { | |
1da177e4 LT |
235 | /* |
236 | * You can have DMA off or 1 and 3 thats the lot | |
237 | * on the Comtrol. | |
238 | */ | |
52e8a6a2 KH |
239 | sv->chanA.txdma = 3; |
240 | sv->chanA.rxdma = 1; | |
241 | outb(0x03 | 0x08, iobase + 4); /* DMA on */ | |
242 | if (request_dma(sv->chanA.txdma, "Hostess SV/11 (TX)")) | |
243 | goto err_txdma; | |
244 | ||
245 | if (dma == 1) | |
246 | if (request_dma(sv->chanA.rxdma, "Hostess SV/11 (RX)")) | |
247 | goto err_rxdma; | |
1da177e4 LT |
248 | } |
249 | ||
250 | /* Kill our private IRQ line the hostess can end up chattering | |
251 | until the configuration is set */ | |
252 | disable_irq(irq); | |
52e8a6a2 | 253 | |
1da177e4 LT |
254 | /* |
255 | * Begin normal initialise | |
256 | */ | |
52e8a6a2 KH |
257 | |
258 | if (z8530_init(sv)) { | |
23efcb73 | 259 | pr_err("Z8530 series device not found\n"); |
1da177e4 | 260 | enable_irq(irq); |
52e8a6a2 | 261 | goto free_dma; |
1da177e4 | 262 | } |
52e8a6a2 KH |
263 | z8530_channel_load(&sv->chanB, z8530_dead_port); |
264 | if (sv->type == Z85C30) | |
265 | z8530_channel_load(&sv->chanA, z8530_hdlc_kilostream); | |
1da177e4 | 266 | else |
52e8a6a2 KH |
267 | z8530_channel_load(&sv->chanA, z8530_hdlc_kilostream_85230); |
268 | ||
1da177e4 | 269 | enable_irq(irq); |
1da177e4 LT |
270 | |
271 | /* | |
272 | * Now we can take the IRQ | |
273 | */ | |
1da177e4 | 274 | |
52e8a6a2 KH |
275 | sv->chanA.netdevice = netdev = alloc_hdlcdev(sv); |
276 | if (!netdev) | |
277 | goto free_dma; | |
1da177e4 | 278 | |
52e8a6a2 KH |
279 | dev_to_hdlc(netdev)->attach = hostess_attach; |
280 | dev_to_hdlc(netdev)->xmit = hostess_queue_xmit; | |
991990a1 | 281 | netdev->netdev_ops = &hostess_ops; |
52e8a6a2 KH |
282 | netdev->base_addr = iobase; |
283 | netdev->irq = irq; | |
284 | ||
285 | if (register_hdlc_device(netdev)) { | |
23efcb73 | 286 | pr_err("unable to register HDLC device\n"); |
52e8a6a2 KH |
287 | free_netdev(netdev); |
288 | goto free_dma; | |
1da177e4 | 289 | } |
52e8a6a2 KH |
290 | |
291 | z8530_describe(sv, "I/O", iobase); | |
292 | sv->active = 1; | |
293 | return sv; | |
294 | ||
295 | free_dma: | |
296 | if (dma == 1) | |
297 | free_dma(sv->chanA.rxdma); | |
298 | err_rxdma: | |
299 | if (dma) | |
300 | free_dma(sv->chanA.txdma); | |
301 | err_txdma: | |
302 | free_irq(irq, sv); | |
303 | err_irq: | |
1da177e4 | 304 | kfree(sv); |
52e8a6a2 KH |
305 | err_kzalloc: |
306 | release_region(iobase, 8); | |
1da177e4 LT |
307 | return NULL; |
308 | } | |
309 | ||
52e8a6a2 | 310 | static void sv11_shutdown(struct z8530_dev *dev) |
1da177e4 | 311 | { |
52e8a6a2 KH |
312 | unregister_hdlc_device(dev->chanA.netdevice); |
313 | z8530_shutdown(dev); | |
314 | free_irq(dev->irq, dev); | |
315 | if (dma) { | |
316 | if (dma == 1) | |
317 | free_dma(dev->chanA.rxdma); | |
318 | free_dma(dev->chanA.txdma); | |
1da177e4 | 319 | } |
52e8a6a2 KH |
320 | release_region(dev->chanA.ctrlio - 1, 8); |
321 | free_netdev(dev->chanA.netdevice); | |
1da177e4 LT |
322 | kfree(dev); |
323 | } | |
324 | ||
52e8a6a2 KH |
325 | static int io = 0x200; |
326 | static int irq = 9; | |
1da177e4 | 327 | |
af28a03c | 328 | module_param_hw(io, int, ioport, 0); |
1da177e4 | 329 | MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card"); |
af28a03c | 330 | module_param_hw(dma, int, dma, 0); |
1da177e4 | 331 | MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX"); |
af28a03c | 332 | module_param_hw(irq, int, irq, 0); |
1da177e4 LT |
333 | MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card"); |
334 | ||
335 | MODULE_AUTHOR("Alan Cox"); | |
336 | MODULE_LICENSE("GPL"); | |
337 | MODULE_DESCRIPTION("Modular driver for the Comtrol Hostess SV11"); | |
338 | ||
52e8a6a2 | 339 | static struct z8530_dev *sv11_unit; |
1da177e4 LT |
340 | |
341 | int init_module(void) | |
342 | { | |
52e8a6a2 | 343 | if ((sv11_unit = sv11_init(io, irq)) == NULL) |
1da177e4 LT |
344 | return -ENODEV; |
345 | return 0; | |
346 | } | |
347 | ||
348 | void cleanup_module(void) | |
349 | { | |
52e8a6a2 | 350 | if (sv11_unit) |
1da177e4 LT |
351 | sv11_shutdown(sv11_unit); |
352 | } |