2 * cycx_drv.c Cyclom 2X Support Module.
4 * This module is a library of common hardware specific
5 * functions used by the Cyclades Cyclom 2X sync card.
7 * Author: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
9 * Copyright: (c) 1998-2003 Arnaldo Carvalho de Melo
11 * Based on sdladrv.c by Gene Kozin <genek@compuserve.com>
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
17 * ============================================================================
18 * 1999/11/11 acme set_current_state(TASK_INTERRUPTIBLE), code
20 * 1999/11/08 acme init_cyc2x deleted, doing nothing
21 * 1999/11/06 acme back to read[bw], write[bw] and memcpy_to and
22 * fromio to use dpmbase ioremaped
23 * 1999/10/26 acme use isa_read[bw], isa_write[bw] & isa_memcpy_to
25 * 1999/10/23 acme cleanup to only supports cyclom2x: all the other
26 * boards are no longer manufactured by cyclades,
27 * if someone wants to support them... be my guest!
28 * 1999/05/28 acme cycx_intack & cycx_intde gone for good
29 * 1999/05/18 acme lots of unlogged work, submitting to Linus...
30 * 1999/01/03 acme more judicious use of data types
31 * 1999/01/03 acme judicious use of data types :>
32 * cycx_inten trying to reset pending interrupts
33 * from cyclom 2x - I think this isn't the way to
35 * 1999/01/02 acme cycx_intack ok, I think there's nothing to do
36 * to ack an int in cycx_drv.c, only handle it in
37 * cyx_isr (or in the other protocols: cyp_isr,
38 * cyf_isr, when they get implemented.
39 * Dec 31, 1998 acme cycx_data_boot & cycx_code_boot fixed, crossing
40 * fingers to see x25_configure in cycx_x25.c
42 * Dec 26, 1998 acme load implementation fixed, seems to work! :)
43 * cycx_2x_dpmbase_options with all the possible
45 * cycx_intr implemented (test this!)
46 * general code cleanup
47 * Dec 8, 1998 Ivan Passos Cyclom-2X firmware load implementation.
48 * Aug 8, 1998 acme Initial version.
51 #include <linux/init.h> /* __init */
52 #include <linux/module.h>
53 #include <linux/kernel.h> /* printk(), and other useful stuff */
54 #include <linux/stddef.h> /* offsetof(), etc. */
55 #include <linux/errno.h> /* return codes */
56 #include <linux/sched.h> /* for jiffies, HZ, etc. */
57 #include <linux/cycx_drv.h> /* API definitions */
58 #include <linux/cycx_cfm.h> /* CYCX firmware module definitions */
59 #include <linux/delay.h> /* udelay */
60 #include <asm/io.h> /* read[wl], write[wl], ioremap, iounmap */
65 MODULE_AUTHOR("Arnaldo Carvalho de Melo");
66 MODULE_DESCRIPTION("Cyclom 2x Sync Card Driver");
67 MODULE_LICENSE("GPL");
69 /* Hardware-specific functions */
70 static int load_cyc2x(struct cycx_hw *hw, struct cycx_firmware *cfm, u32 len);
71 static void cycx_bootcfg(struct cycx_hw *hw);
73 static int reset_cyc2x(void __iomem *addr);
74 static int detect_cyc2x(void __iomem *addr);
76 /* Miscellaneous functions */
77 static void delay_cycx(int sec);
78 static int get_option_index(long *optlist, long optval);
79 static u16 checksum(u8 *buf, u32 len);
81 #define wait_cyc(addr) cycx_exec(addr + CMD_OFFSET)
86 static char modname[] = "cycx_drv";
87 static char fullname[] = "Cyclom 2X Support Module";
88 static char copyright[] = "(c) 1998-2003 Arnaldo Carvalho de Melo "
89 "<acme@conectiva.com.br>";
91 /* Hardware configuration options.
92 * These are arrays of configuration options used by verification routines.
93 * The first element of each array is its size (i.e. number of options).
95 static long cyc2x_dpmbase_options[] = {
97 0xA0000, 0xA4000, 0xA8000, 0xAC000, 0xB0000, 0xB4000, 0xB8000,
98 0xBC000, 0xC0000, 0xC4000, 0xC8000, 0xCC000, 0xD0000, 0xD4000,
99 0xD8000, 0xDC000, 0xE0000, 0xE4000, 0xE8000, 0xEC000
102 static long cycx_2x_irq_options[] = { 7, 3, 5, 9, 10, 11, 12, 15 };
104 /* Kernel Loadable Module Entry Points */
105 /* Module 'insert' entry point.
106 * o print announcement
107 * o initialize static data
111 * Context: process */
113 int __init cycx_drv_init(void)
115 printk(KERN_INFO "%s v%u.%u %s\n", fullname, MOD_VERSION, MOD_RELEASE,
121 /* Module 'remove' entry point.
122 * o release all remaining system resources */
123 void cycx_drv_cleanup(void)
129 * o detect adapter type
130 * o verify hardware configuration options
131 * o check for hardware conflicts
132 * o set up adapter shared memory
133 * o test adapter memory
137 EXPORT_SYMBOL(cycx_setup);
138 int cycx_setup(struct cycx_hw *hw, void *cfm, u32 len, unsigned long dpmbase)
142 /* Verify IRQ configuration options */
143 if (!get_option_index(cycx_2x_irq_options, hw->irq)) {
144 printk(KERN_ERR "%s: IRQ %d is invalid!\n", modname, hw->irq);
148 /* Setup adapter dual-port memory window and test memory */
150 printk(KERN_ERR "%s: you must specify the dpm address!\n",
153 } else if (!get_option_index(cyc2x_dpmbase_options, dpmbase)) {
154 printk(KERN_ERR "%s: memory address 0x%lX is invalid!\n",
159 hw->dpmbase = ioremap(dpmbase, CYCX_WINDOWSIZE);
160 hw->dpmsize = CYCX_WINDOWSIZE;
162 if (!detect_cyc2x(hw->dpmbase)) {
163 printk(KERN_ERR "%s: adapter Cyclom 2X not found at "
164 "address 0x%lX!\n", modname, dpmbase);
168 printk(KERN_INFO "%s: found Cyclom 2X card at address 0x%lX.\n",
171 /* Load firmware. If loader fails then shut down adapter */
172 err = load_cyc2x(hw, cfm, len);
175 cycx_down(hw); /* shutdown adapter */
180 EXPORT_SYMBOL(cycx_down);
181 int cycx_down(struct cycx_hw *hw)
183 iounmap(hw->dpmbase);
187 /* Enable interrupt generation. */
188 EXPORT_SYMBOL(cycx_inten);
189 void cycx_inten(struct cycx_hw *hw)
191 writeb(0, hw->dpmbase);
194 /* Generate an interrupt to adapter's CPU. */
195 EXPORT_SYMBOL(cycx_intr);
196 void cycx_intr(struct cycx_hw *hw)
198 writew(0, hw->dpmbase + GEN_CYCX_INTR);
201 /* Execute Adapter Command.
203 * o Busy-wait until flag is reset. */
204 EXPORT_SYMBOL(cycx_exec);
205 int cycx_exec(void __iomem *addr)
208 /* wait till addr content is zeroed */
210 while (readw(addr)) {
220 /* Read absolute adapter memory.
221 * Transfer data from adapter's memory to data buffer. */
222 EXPORT_SYMBOL(cycx_peek);
223 int cycx_peek(struct cycx_hw *hw, u32 addr, void *buf, u32 len)
226 *(u8*)buf = readb(hw->dpmbase + addr);
228 memcpy_fromio(buf, hw->dpmbase + addr, len);
233 /* Write Absolute Adapter Memory.
234 * Transfer data from data buffer to adapter's memory. */
235 EXPORT_SYMBOL(cycx_poke);
236 int cycx_poke(struct cycx_hw *hw, u32 addr, void *buf, u32 len)
239 writeb(*(u8*)buf, hw->dpmbase + addr);
241 memcpy_toio(hw->dpmbase + addr, buf, len);
246 /* Hardware-Specific Functions */
248 /* Load Aux Routines */
249 /* Reset board hardware.
250 return 1 if memory exists at addr and 0 if not. */
251 static int memory_exists(void __iomem *addr)
255 for (; tries < 3 ; tries++) {
256 writew(TEST_PATTERN, addr + 0x10);
258 if (readw(addr + 0x10) == TEST_PATTERN)
259 if (readw(addr + 0x10) == TEST_PATTERN)
268 /* Load reset code. */
269 static void reset_load(void __iomem *addr, u8 *buffer, u32 cnt)
271 void __iomem *pt_code = addr + RESET_OFFSET;
274 for (i = 0 ; i < cnt ; i++) {
275 /* for (j = 0 ; j < 50 ; j++); Delay - FIXME busy waiting... */
276 writeb(*buffer++, pt_code++);
280 /* Load buffer using boot interface.
281 * o copy data from buffer to Cyclom-X memory
282 * o wait for reset code to copy it to right portion of memory */
283 static int buffer_load(void __iomem *addr, u8 *buffer, u32 cnt)
285 memcpy_toio(addr + DATA_OFFSET, buffer, cnt);
286 writew(GEN_BOOT_DAT, addr + CMD_OFFSET);
288 return wait_cyc(addr);
291 /* Set up entry point and kick start Cyclom-X CPU. */
292 static void cycx_start(void __iomem *addr)
294 /* put in 0x30 offset the jump instruction to the code entry point */
295 writeb(0xea, addr + 0x30);
296 writeb(0x00, addr + 0x31);
297 writeb(0xc4, addr + 0x32);
298 writeb(0x00, addr + 0x33);
299 writeb(0x00, addr + 0x34);
301 /* cmd to start executing code */
302 writew(GEN_START, addr + CMD_OFFSET);
305 /* Load and boot reset code. */
306 static void cycx_reset_boot(void __iomem *addr, u8 *code, u32 len)
308 void __iomem *pt_start = addr + START_OFFSET;
310 writeb(0xea, pt_start++); /* jmp to f000:3f00 */
311 writeb(0x00, pt_start++);
312 writeb(0xfc, pt_start++);
313 writeb(0x00, pt_start++);
314 writeb(0xf0, pt_start);
315 reset_load(addr, code, len);
317 /* 80186 was in hold, go */
318 writeb(0, addr + START_CPU);
322 /* Load data.bin file through boot (reset) interface. */
323 static int cycx_data_boot(void __iomem *addr, u8 *code, u32 len)
325 void __iomem *pt_boot_cmd = addr + CMD_OFFSET;
328 /* boot buffer lenght */
329 writew(CFM_LOAD_BUFSZ, pt_boot_cmd + sizeof(u16));
330 writew(GEN_DEFPAR, pt_boot_cmd);
332 if (wait_cyc(addr) < 0)
335 writew(0, pt_boot_cmd + sizeof(u16));
336 writew(0x4000, pt_boot_cmd + 2 * sizeof(u16));
337 writew(GEN_SET_SEG, pt_boot_cmd);
339 if (wait_cyc(addr) < 0)
342 for (i = 0 ; i < len ; i += CFM_LOAD_BUFSZ)
343 if (buffer_load(addr, code + i,
344 min_t(u32, CFM_LOAD_BUFSZ, (len - i))) < 0) {
345 printk(KERN_ERR "%s: Error !!\n", modname);
353 /* Load code.bin file through boot (reset) interface. */
354 static int cycx_code_boot(void __iomem *addr, u8 *code, u32 len)
356 void __iomem *pt_boot_cmd = addr + CMD_OFFSET;
359 /* boot buffer lenght */
360 writew(CFM_LOAD_BUFSZ, pt_boot_cmd + sizeof(u16));
361 writew(GEN_DEFPAR, pt_boot_cmd);
363 if (wait_cyc(addr) < 0)
366 writew(0x0000, pt_boot_cmd + sizeof(u16));
367 writew(0xc400, pt_boot_cmd + 2 * sizeof(u16));
368 writew(GEN_SET_SEG, pt_boot_cmd);
370 if (wait_cyc(addr) < 0)
373 for (i = 0 ; i < len ; i += CFM_LOAD_BUFSZ)
374 if (buffer_load(addr, code + i,
375 min_t(u32, CFM_LOAD_BUFSZ, (len - i)))) {
376 printk(KERN_ERR "%s: Error !!\n", modname);
383 /* Load adapter from the memory image of the CYCX firmware module.
384 * o verify firmware integrity and compatibility
385 * o start adapter up */
386 static int load_cyc2x(struct cycx_hw *hw, struct cycx_firmware *cfm, u32 len)
389 struct cycx_fw_header *img_hdr;
393 void __iomem *pt_cycld = hw->dpmbase + 0x400;
397 printk(KERN_INFO "%s: firmware signature=\"%s\"\n", modname,
400 /* Verify firmware signature */
401 if (strcmp(cfm->signature, CFM_SIGNATURE)) {
402 printk(KERN_ERR "%s:load_cyc2x: not Cyclom-2X firmware!\n",
407 printk(KERN_INFO "%s: firmware version=%u\n", modname, cfm->version);
409 /* Verify firmware module format version */
410 if (cfm->version != CFM_VERSION) {
411 printk(KERN_ERR "%s:%s: firmware format %u rejected! "
413 modname, __FUNCTION__, cfm->version, CFM_VERSION);
417 /* Verify firmware module length and checksum */
418 cksum = checksum((u8*)&cfm->info, sizeof(struct cycx_fw_info) +
421 FIXME cfm->info.codesize is off by 2
422 if (((len - sizeof(struct cycx_firmware) - 1) != cfm->info.codesize) ||
424 if (cksum != cfm->checksum) {
425 printk(KERN_ERR "%s:%s: firmware corrupted!\n",
426 modname, __FUNCTION__);
427 printk(KERN_ERR " cdsize = 0x%x (expected 0x%lx)\n",
428 len - (int)sizeof(struct cycx_firmware) - 1,
430 printk(KERN_ERR " chksum = 0x%x (expected 0x%x)\n",
431 cksum, cfm->checksum);
435 /* If everything is ok, set reset, data and code pointers */
436 img_hdr = (struct cycx_fw_header *)&cfm->image;
437 #ifdef FIRMWARE_DEBUG
438 printk(KERN_INFO "%s:%s: image sizes\n", __FUNCTION__, modname);
439 printk(KERN_INFO " reset=%lu\n", img_hdr->reset_size);
440 printk(KERN_INFO " data=%lu\n", img_hdr->data_size);
441 printk(KERN_INFO " code=%lu\n", img_hdr->code_size);
443 reset_image = ((u8 *)img_hdr) + sizeof(struct cycx_fw_header);
444 data_image = reset_image + img_hdr->reset_size;
445 code_image = data_image + img_hdr->data_size;
447 /*---- Start load ----*/
449 printk(KERN_INFO "%s: loading firmware %s (ID=%u)...\n", modname,
450 cfm->descr[0] ? cfm->descr : "unknown firmware",
453 for (i = 0 ; i < 5 ; i++) {
454 /* Reset Cyclom hardware */
455 if (!reset_cyc2x(hw->dpmbase)) {
456 printk(KERN_ERR "%s: dpm problem or board not found\n",
462 cycx_reset_boot(hw->dpmbase, reset_image, img_hdr->reset_size);
463 /* reset is waiting for boot */
464 writew(GEN_POWER_ON, pt_cycld);
467 for (j = 0 ; j < 3 ; j++)
468 if (!readw(pt_cycld))
474 printk(KERN_ERR "%s: reset not started.\n", modname);
479 if (cycx_data_boot(hw->dpmbase, data_image, img_hdr->data_size)) {
480 printk(KERN_ERR "%s: cannot load data file.\n", modname);
485 if (cycx_code_boot(hw->dpmbase, code_image, img_hdr->code_size)) {
486 printk(KERN_ERR "%s: cannot load code file.\n", modname);
490 /* Prepare boot-time configuration data */
494 cycx_start(hw->dpmbase);
496 /* Arthur Ganzert's tip: wait a while after the firmware loading...
497 seg abr 26 17:17:12 EST 1999 - acme */
499 printk(KERN_INFO "%s: firmware loaded!\n", modname);
501 /* enable interrupts */
507 /* Prepare boot-time firmware configuration data.
508 * o initialize configuration data area
509 From async.doc - V_3.4.0 - 07/18/1994
510 - As of now, only static buffers are available to the user.
511 So, the bit VD_RXDIRC must be set in 'valid'. That means that user
512 wants to use the static transmission and reception buffers. */
513 static void cycx_bootcfg(struct cycx_hw *hw)
515 /* use fixed buffers */
516 writeb(FIXED_BUFFERS, hw->dpmbase + CONF_OFFSET);
519 /* Detect Cyclom 2x adapter.
520 * Following tests are used to detect Cyclom 2x adapter:
521 * to be completed based on the tests done below
522 * Return 1 if detected o.k. or 0 if failed.
523 * Note: This test is destructive! Adapter will be left in shutdown
524 * state after the test. */
525 static int detect_cyc2x(void __iomem *addr)
529 return memory_exists(addr);
533 /* Get option's index into the options list.
534 * Return option's index (1 .. N) or zero if option is invalid. */
535 static int get_option_index(long *optlist, long optval)
539 for (; i <= optlist[0]; ++i)
540 if (optlist[i] == optval)
546 /* Reset adapter's CPU. */
547 static int reset_cyc2x(void __iomem *addr)
549 writeb(0, addr + RST_ENABLE);
551 writeb(0, addr + RST_DISABLE);
554 return memory_exists(addr);
558 static void delay_cycx(int sec)
560 set_current_state(TASK_INTERRUPTIBLE);
561 schedule_timeout(sec * HZ);
564 /* Calculate 16-bit CRC using CCITT polynomial. */
565 static u16 checksum(u8 *buf, u32 len)
570 for (; len; --len, ++buf)
571 for (mask = 0x80; mask; mask >>= 1) {
572 flag = (crc & 0x8000);
574 crc |= ((*buf & mask) ? 1 : 0);
583 module_init(cycx_drv_init);
584 module_exit(cycx_drv_cleanup);