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Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
[wrt350n-kernel.git] / drivers / net / wan / pci200syn.c
blobb595b64e753809205151ae658d61ca2014f46d43
1 /*
2 * Goramo PCI200SYN synchronous serial card driver for Linux
3 *
4 * Copyright (C) 2002-2003 Krzysztof Halasa <khc@pm.waw.pl>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2 of the GNU General Public License
8 * as published by the Free Software Foundation.
9 *
10 * For information see <http://www.kernel.org/pub/linux/utils/net/hdlc/>
11 *
12 * Sources of information:
13 * Hitachi HD64572 SCA-II User's Manual
14 * PLX Technology Inc. PCI9052 Data Book
15 */
16
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/slab.h>
20 #include <linux/types.h>
21 #include <linux/fcntl.h>
22 #include <linux/in.h>
23 #include <linux/string.h>
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/ioport.h>
27 #include <linux/moduleparam.h>
28 #include <linux/netdevice.h>
29 #include <linux/hdlc.h>
30 #include <linux/pci.h>
31 #include <linux/delay.h>
32 #include <asm/io.h>
33
34 #include "hd64572.h"
35
36 static const char* version = "Goramo PCI200SYN driver version: 1.16";
37 static const char* devname = "PCI200SYN";
38
39 #undef DEBUG_PKT
40 #define DEBUG_RINGS
41
42 #define PCI200SYN_PLX_SIZE 0x80 /* PLX control window size (128b) */
43 #define PCI200SYN_SCA_SIZE 0x400 /* SCA window size (1Kb) */
44 #define ALL_PAGES_ALWAYS_MAPPED
45 #define NEED_DETECT_RAM
46 #define NEED_SCA_MSCI_INTR
47 #define MAX_TX_BUFFERS 10
48
49 static int pci_clock_freq = 33000000;
50 #define CLOCK_BASE pci_clock_freq
51
52 /*
53 * PLX PCI9052 local configuration and shared runtime registers.
54 * This structure can be used to access 9052 registers (memory mapped).
55 */
56 typedef struct {
57 u32 loc_addr_range[4]; /* 00-0Ch : Local Address Ranges */
58 u32 loc_rom_range; /* 10h : Local ROM Range */
59 u32 loc_addr_base[4]; /* 14-20h : Local Address Base Addrs */
60 u32 loc_rom_base; /* 24h : Local ROM Base */
61 u32 loc_bus_descr[4]; /* 28-34h : Local Bus Descriptors */
62 u32 rom_bus_descr; /* 38h : ROM Bus Descriptor */
63 u32 cs_base[4]; /* 3C-48h : Chip Select Base Addrs */
64 u32 intr_ctrl_stat; /* 4Ch : Interrupt Control/Status */
65 u32 init_ctrl; /* 50h : EEPROM ctrl, Init Ctrl, etc */
66 }plx9052;
67
68
69
70 typedef struct port_s {
71 struct net_device *dev;
72 struct card_s *card;
73 spinlock_t lock; /* TX lock */
74 sync_serial_settings settings;
75 int rxpart; /* partial frame received, next frame invalid*/
76 unsigned short encoding;
77 unsigned short parity;
78 u16 rxin; /* rx ring buffer 'in' pointer */
79 u16 txin; /* tx ring buffer 'in' and 'last' pointers */
80 u16 txlast;
81 u8 rxs, txs, tmc; /* SCA registers */
82 u8 phy_node; /* physical port # - 0 or 1 */
83 }port_t;
84
85
86
87 typedef struct card_s {
88 u8 __iomem *rambase; /* buffer memory base (virtual) */
89 u8 __iomem *scabase; /* SCA memory base (virtual) */
90 plx9052 __iomem *plxbase;/* PLX registers memory base (virtual) */
91 u16 rx_ring_buffers; /* number of buffers in a ring */
92 u16 tx_ring_buffers;
93 u16 buff_offset; /* offset of first buffer of first channel */
94 u8 irq; /* interrupt request level */
95
96 port_t ports[2];
97 }card_t;
98
99
100 #define sca_in(reg, card) readb(card->scabase + (reg))
101 #define sca_out(value, reg, card) writeb(value, card->scabase + (reg))
102 #define sca_inw(reg, card) readw(card->scabase + (reg))
103 #define sca_outw(value, reg, card) writew(value, card->scabase + (reg))
104 #define sca_inl(reg, card) readl(card->scabase + (reg))
105 #define sca_outl(value, reg, card) writel(value, card->scabase + (reg))
106
107 #define port_to_card(port) (port->card)
108 #define log_node(port) (port->phy_node)
109 #define phy_node(port) (port->phy_node)
110 #define winbase(card) (card->rambase)
111 #define get_port(card, port) (&card->ports[port])
112 #define sca_flush(card) (sca_in(IER0, card));
113
114 static inline void new_memcpy_toio(char __iomem *dest, char *src, int length)
115 {
116 int len;
117 do {
118 len = length > 256 ? 256 : length;
119 memcpy_toio(dest, src, len);
120 dest += len;
121 src += len;
122 length -= len;
123 readb(dest);
124 } while (len);
125 }
126
127 #undef memcpy_toio
128 #define memcpy_toio new_memcpy_toio
129
130 #include "hd6457x.c"
131
132
133 static void pci200_set_iface(port_t *port)
134 {
135 card_t *card = port->card;
136 u16 msci = get_msci(port);
137 u8 rxs = port->rxs & CLK_BRG_MASK;
138 u8 txs = port->txs & CLK_BRG_MASK;
139
140 sca_out(EXS_TES1, (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET) + EXS,
141 port_to_card(port));
142 switch(port->settings.clock_type) {
143 case CLOCK_INT:
144 rxs |= CLK_BRG; /* BRG output */
145 txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */
146 break;
147
148 case CLOCK_TXINT:
149 rxs |= CLK_LINE; /* RXC input */
150 txs |= CLK_PIN_OUT | CLK_BRG; /* BRG output */
151 break;
152
153 case CLOCK_TXFROMRX:
154 rxs |= CLK_LINE; /* RXC input */
155 txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */
156 break;
157
158 default: /* EXTernal clock */
159 rxs |= CLK_LINE; /* RXC input */
160 txs |= CLK_PIN_OUT | CLK_LINE; /* TXC input */
161 break;
162 }
163
164 port->rxs = rxs;
165 port->txs = txs;
166 sca_out(rxs, msci + RXS, card);
167 sca_out(txs, msci + TXS, card);
168 sca_set_port(port);
169 }
170
171
172
173 static int pci200_open(struct net_device *dev)
174 {
175 port_t *port = dev_to_port(dev);
176
177 int result = hdlc_open(dev);
178 if (result)
179 return result;
180
181 sca_open(dev);
182 pci200_set_iface(port);
183 sca_flush(port_to_card(port));
184 return 0;
185 }
186
187
188
189 static int pci200_close(struct net_device *dev)
190 {
191 sca_close(dev);
192 sca_flush(port_to_card(dev_to_port(dev)));
193 hdlc_close(dev);
194 return 0;
195 }
196
197
198
199 static int pci200_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
200 {
201 const size_t size = sizeof(sync_serial_settings);
202 sync_serial_settings new_line;
203 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
204 port_t *port = dev_to_port(dev);
205
206 #ifdef DEBUG_RINGS
207 if (cmd == SIOCDEVPRIVATE) {
208 sca_dump_rings(dev);
209 return 0;
210 }
211 #endif
212 if (cmd != SIOCWANDEV)
213 return hdlc_ioctl(dev, ifr, cmd);
214
215 switch(ifr->ifr_settings.type) {
216 case IF_GET_IFACE:
217 ifr->ifr_settings.type = IF_IFACE_V35;
218 if (ifr->ifr_settings.size < size) {
219 ifr->ifr_settings.size = size; /* data size wanted */
220 return -ENOBUFS;
221 }
222 if (copy_to_user(line, &port->settings, size))
223 return -EFAULT;
224 return 0;
225
226 case IF_IFACE_V35:
227 case IF_IFACE_SYNC_SERIAL:
228 if (!capable(CAP_NET_ADMIN))
229 return -EPERM;
230
231 if (copy_from_user(&new_line, line, size))
232 return -EFAULT;
233
234 if (new_line.clock_type != CLOCK_EXT &&
235 new_line.clock_type != CLOCK_TXFROMRX &&
236 new_line.clock_type != CLOCK_INT &&
237 new_line.clock_type != CLOCK_TXINT)
238 return -EINVAL; /* No such clock setting */
239
240 if (new_line.loopback != 0 && new_line.loopback != 1)
241 return -EINVAL;
242
243 memcpy(&port->settings, &new_line, size); /* Update settings */
244 pci200_set_iface(port);
245 sca_flush(port_to_card(port));
246 return 0;
247
248 default:
249 return hdlc_ioctl(dev, ifr, cmd);
250 }
251 }
252
253
254
255 static void pci200_pci_remove_one(struct pci_dev *pdev)
256 {
257 int i;
258 card_t *card = pci_get_drvdata(pdev);
259
260 for (i = 0; i < 2; i++)
261 if (card->ports[i].card) {
262 struct net_device *dev = port_to_dev(&card->ports[i]);
263 unregister_hdlc_device(dev);
264 }
265
266 if (card->irq)
267 free_irq(card->irq, card);
268
269 if (card->rambase)
270 iounmap(card->rambase);
271 if (card->scabase)
272 iounmap(card->scabase);
273 if (card->plxbase)
274 iounmap(card->plxbase);
275
276 pci_release_regions(pdev);
277 pci_disable_device(pdev);
278 pci_set_drvdata(pdev, NULL);
279 if (card->ports[0].dev)
280 free_netdev(card->ports[0].dev);
281 if (card->ports[1].dev)
282 free_netdev(card->ports[1].dev);
283 kfree(card);
284 }
285
286
287
288 static int __devinit pci200_pci_init_one(struct pci_dev *pdev,
289 const struct pci_device_id *ent)
290 {
291 card_t *card;
292 u32 __iomem *p;
293 int i;
294 u32 ramsize;
295 u32 ramphys; /* buffer memory base */
296 u32 scaphys; /* SCA memory base */
297 u32 plxphys; /* PLX registers memory base */
298
299 #ifndef MODULE
300 static int printed_version;
301 if (!printed_version++)
302 printk(KERN_INFO "%s\n", version);
303 #endif
304
305 i = pci_enable_device(pdev);
306 if (i)
307 return i;
308
309 i = pci_request_regions(pdev, "PCI200SYN");
310 if (i) {
311 pci_disable_device(pdev);
312 return i;
313 }
314
315 card = kzalloc(sizeof(card_t), GFP_KERNEL);
316 if (card == NULL) {
317 printk(KERN_ERR "pci200syn: unable to allocate memory\n");
318 pci_release_regions(pdev);
319 pci_disable_device(pdev);
320 return -ENOBUFS;
321 }
322 pci_set_drvdata(pdev, card);
323 card->ports[0].dev = alloc_hdlcdev(&card->ports[0]);
324 card->ports[1].dev = alloc_hdlcdev(&card->ports[1]);
325 if (!card->ports[0].dev || !card->ports[1].dev) {
326 printk(KERN_ERR "pci200syn: unable to allocate memory\n");
327 pci200_pci_remove_one(pdev);
328 return -ENOMEM;
329 }
330
331 if (pci_resource_len(pdev, 0) != PCI200SYN_PLX_SIZE ||
332 pci_resource_len(pdev, 2) != PCI200SYN_SCA_SIZE ||
333 pci_resource_len(pdev, 3) < 16384) {
334 printk(KERN_ERR "pci200syn: invalid card EEPROM parameters\n");
335 pci200_pci_remove_one(pdev);
336 return -EFAULT;
337 }
338
339 plxphys = pci_resource_start(pdev,0) & PCI_BASE_ADDRESS_MEM_MASK;
340 card->plxbase = ioremap(plxphys, PCI200SYN_PLX_SIZE);
341
342 scaphys = pci_resource_start(pdev,2) & PCI_BASE_ADDRESS_MEM_MASK;
343 card->scabase = ioremap(scaphys, PCI200SYN_SCA_SIZE);
344
345 ramphys = pci_resource_start(pdev,3) & PCI_BASE_ADDRESS_MEM_MASK;
346 card->rambase = ioremap(ramphys, pci_resource_len(pdev,3));
347
348 if (card->plxbase == NULL ||
349 card->scabase == NULL ||
350 card->rambase == NULL) {
351 printk(KERN_ERR "pci200syn: ioremap() failed\n");
352 pci200_pci_remove_one(pdev);
353 return -EFAULT;
354 }
355
356 /* Reset PLX */
357 p = &card->plxbase->init_ctrl;
358 writel(readl(p) | 0x40000000, p);
359 readl(p); /* Flush the write - do not use sca_flush */
360 udelay(1);
361
362 writel(readl(p) & ~0x40000000, p);
363 readl(p); /* Flush the write - do not use sca_flush */
364 udelay(1);
365
366 ramsize = sca_detect_ram(card, card->rambase,
367 pci_resource_len(pdev, 3));
368
369 /* number of TX + RX buffers for one port - this is dual port card */
370 i = ramsize / (2 * (sizeof(pkt_desc) + HDLC_MAX_MRU));
371 card->tx_ring_buffers = min(i / 2, MAX_TX_BUFFERS);
372 card->rx_ring_buffers = i - card->tx_ring_buffers;
373
374 card->buff_offset = 2 * sizeof(pkt_desc) * (card->tx_ring_buffers +
375 card->rx_ring_buffers);
376
377 printk(KERN_INFO "pci200syn: %u KB RAM at 0x%x, IRQ%u, using %u TX +"
378 " %u RX packets rings\n", ramsize / 1024, ramphys,
379 pdev->irq, card->tx_ring_buffers, card->rx_ring_buffers);
380
381 if (pdev->subsystem_device == PCI_DEVICE_ID_PLX_9050) {
382 printk(KERN_ERR "Detected PCI200SYN card with old "
383 "configuration data.\n");
384 printk(KERN_ERR "See <http://www.kernel.org/pub/"
385 "linux/utils/net/hdlc/pci200syn/> for update.\n");
386 printk(KERN_ERR "The card will stop working with"
387 " future versions of Linux if not updated.\n");
388 }
389
390 if (card->tx_ring_buffers < 1) {
391 printk(KERN_ERR "pci200syn: RAM test failed\n");
392 pci200_pci_remove_one(pdev);
393 return -EFAULT;
394 }
395
396 /* Enable interrupts on the PCI bridge */
397 p = &card->plxbase->intr_ctrl_stat;
398 writew(readw(p) | 0x0040, p);
399
400 /* Allocate IRQ */
401 if (request_irq(pdev->irq, sca_intr, IRQF_SHARED, devname, card)) {
402 printk(KERN_WARNING "pci200syn: could not allocate IRQ%d.\n",
403 pdev->irq);
404 pci200_pci_remove_one(pdev);
405 return -EBUSY;
406 }
407 card->irq = pdev->irq;
408
409 sca_init(card, 0);
410
411 for (i = 0; i < 2; i++) {
412 port_t *port = &card->ports[i];
413 struct net_device *dev = port_to_dev(port);
414 hdlc_device *hdlc = dev_to_hdlc(dev);
415 port->phy_node = i;
416
417 spin_lock_init(&port->lock);
418 dev->irq = card->irq;
419 dev->mem_start = ramphys;
420 dev->mem_end = ramphys + ramsize - 1;
421 dev->tx_queue_len = 50;
422 dev->do_ioctl = pci200_ioctl;
423 dev->open = pci200_open;
424 dev->stop = pci200_close;
425 hdlc->attach = sca_attach;
426 hdlc->xmit = sca_xmit;
427 port->settings.clock_type = CLOCK_EXT;
428 port->card = card;
429 if (register_hdlc_device(dev)) {
430 printk(KERN_ERR "pci200syn: unable to register hdlc "
431 "device\n");
432 port->card = NULL;
433 pci200_pci_remove_one(pdev);
434 return -ENOBUFS;
435 }
436 sca_init_sync_port(port); /* Set up SCA memory */
437
438 printk(KERN_INFO "%s: PCI200SYN node %d\n",
439 dev->name, port->phy_node);
440 }
441
442 sca_flush(card);
443 return 0;
444 }
445
446
447
448 static struct pci_device_id pci200_pci_tbl[] __devinitdata = {
449 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, PCI_VENDOR_ID_PLX,
450 PCI_DEVICE_ID_PLX_9050, 0, 0, 0 },
451 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, PCI_VENDOR_ID_PLX,
452 PCI_DEVICE_ID_PLX_PCI200SYN, 0, 0, 0 },
453 { 0, }
454 };
455
456
457 static struct pci_driver pci200_pci_driver = {
458 .name = "PCI200SYN",
459 .id_table = pci200_pci_tbl,
460 .probe = pci200_pci_init_one,
461 .remove = pci200_pci_remove_one,
462 };
463
464
465 static int __init pci200_init_module(void)
466 {
467 #ifdef MODULE
468 printk(KERN_INFO "%s\n", version);
469 #endif
470 if (pci_clock_freq < 1000000 || pci_clock_freq > 80000000) {
471 printk(KERN_ERR "pci200syn: Invalid PCI clock frequency\n");
472 return -EINVAL;
473 }
474 return pci_register_driver(&pci200_pci_driver);
475 }
476
477
478
479 static void __exit pci200_cleanup_module(void)
480 {
481 pci_unregister_driver(&pci200_pci_driver);
482 }
483
484 MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
485 MODULE_DESCRIPTION("Goramo PCI200SYN serial port driver");
486 MODULE_LICENSE("GPL v2");
487 MODULE_DEVICE_TABLE(pci, pci200_pci_tbl);
488 module_param(pci_clock_freq, int, 0444);
489 MODULE_PARM_DESC(pci_clock_freq, "System PCI clock frequency in Hz");
490 module_init(pci200_init_module);
491 module_exit(pci200_cleanup_module);
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