1 // SPDX-License-Identifier: GPL-2.0-only
2 /*                                              -*- linux-c -*-
3  * dtlk.c - DoubleTalk PC driver for Linux
8  * 2000-03-18 Jim Van Zandt: Fix polling.
20    The DoubleTalk PC contains four voice synthesizers: text-to-speech
40    This driver was written for use with the text-to-speech
57 #include <linux/errno.h>	/* for -EBUSY */
134 	/*  printk("DoubleTalk PC - dtlk_read()\n"); */  in dtlk_read()
137 		return -EINVAL;  in dtlk_read()
144 				return -EFAULT;  in dtlk_read()
149 		if (file->f_flags & O_NONBLOCK)  in dtlk_read()
156 	return -EAGAIN;  in dtlk_read()
171 				return -EFAULT;  in dtlk_write()
182 		return -EINVAL;  in dtlk_write()
198 				/* the RDY bit goes zero 2-3 usec  in dtlk_write()
200 				   180-190 usec later.  Here, we wait  in dtlk_write()
214 		if (file->f_flags & O_NONBLOCK)  in dtlk_write()
221 			printk("dtlk: write timeout.  "  in dtlk_write()
225 			return -EBUSY;  in dtlk_write()
229 	return -EAGAIN;  in dtlk_write()
241 	   printk("<%ld>", jiffies-j);  in dtlk_poll()
285 			return -EINVAL;  in dtlk_ioctl()
293 		return -EINVAL;  in dtlk_ioctl()
305 			return -EBUSY;  in dtlk_open()
309 		return -ENXIO;  in dtlk_open()
340 		printk(KERN_ERR "DoubleTalk PC - cannot register device\n");  in dtlk_init()
371 /* ------------------------------------------------------------------------ */
397 		return -EBUSY;  in dtlk_dev_probe()
401 		printk("DoubleTalk PC - Port %03x = %04x\n",  in dtlk_dev_probe()
414 			printk("DoubleTalk PC at %03x-%03x, "  in dtlk_dev_probe()
417 			       DTLK_IO_EXTENT - 1,  in dtlk_dev_probe()
418 			       sp->rom_version, sp->serial_number);  in dtlk_dev_probe()
497 	printk(KERN_INFO "DoubleTalk PC - not found\n");  in dtlk_dev_probe()
498 	return -ENODEV;  in dtlk_dev_probe()
504    printk(KERN_INFO"\nDoubleTalk PC - MINOR: %d, OPCODE: %d, ERROR: %d\n", 
515 	int total, i;  in dtlk_interrogate()  local
519 	for (total = 0, i = 0; i < 50; i++) {  in dtlk_interrogate()
520 		buf[total] = dtlk_read_tts();  in dtlk_interrogate()
521 		if (total > 2 && buf[total] == 0x7f)  in dtlk_interrogate()
523 		if (total < sizeof(struct dtlk_settings))  in dtlk_interrogate()
524 			total++;  in dtlk_interrogate()
540 		if (i < sizeof(status.rom_version) - 1)  in dtlk_interrogate()
578 		printk(KERN_ERR "dtlk_read_tts() timeout\n");  in dtlk_read_tts()
590 		printk(KERN_ERR "dtlk_read_tts() timeout\n");  in dtlk_read_tts()
602 	/* no need to test -- this is only called when the port is readable */  in dtlk_read_lpc()
608 	/* acknowledging a read takes 3-4  in dtlk_read_lpc()
612 	while (inb_p(dtlk_port_lpc) != 0x7f && --retries > 0);  in dtlk_read_lpc()
614 		printk(KERN_ERR "dtlk_read_lpc() timeout\n");  in dtlk_read_lpc()
624 	/*  printk("dtlk_write_bytes(\"%-*s\", %d)\n", n, buf, n); */  in dtlk_write_bytes()
626 	while (n-- > 0)  in dtlk_write_bytes()
647 		printk(KERN_ERR "dtlk_write_tts() timeout\n");  in dtlk_write_tts()
650 	/* the RDY bit goes zero 2-3 usec after writing, and goes  in dtlk_write_tts()
651 	   1 again 180-190 usec later.  Here, we wait up to 10  in dtlk_write_tts()