2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
16 * Copyright (C) 2005 infineon
17 * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
21 #include <linux/module.h>
22 #include <linux/types.h>
23 #include <linux/errno.h>
24 #include <linux/proc_fs.h>
25 #include <linux/init.h>
26 #include <linux/ioctl.h>
27 #include <asm/semaphore.h>
28 #include <asm/uaccess.h>
29 #include <asm/danube/danube.h>
30 #include <asm/danube/danube_ioctl.h>
33 #define DANUBE_PORT_OUT_REG 0x00000010
34 #define DANUBE_PORT_IN_REG 0x00000014
35 #define DANUBE_PORT_DIR_REG 0x00000018
36 #define DANUBE_PORT_ALTSEL0_REG 0x0000001C
37 #define DANUBE_PORT_ALTSEL1_REG 0x00000020
38 #define DANUBE_PORT_OD_REG 0x00000024
39 #define DANUBE_PORT_STOFF_REG 0x00000028
40 #define DANUBE_PORT_PUDSEL_REG 0x0000002C
41 #define DANUBE_PORT_PUDEN_REG 0x00000030
43 #define PORT_MODULE_ID 0xff
45 #define PORT_WRITE_REG(reg, value) \
46 *((volatile u32*)(reg)) = (u32)value;
48 #define PORT_READ_REG(reg, value) \
49 value = (u32)*((volatile u32*)(reg));
51 #define PORT_IOC_CALL(ret,port,pin,func) \
52 ret=danube_port_reserve_pin(port,pin,PORT_MODULE_ID); \
53 if (ret == 0) ret=func(port,pin,PORT_MODULE_ID); \
54 if (ret == 0) ret=danube_port_free_pin(port,pin,PORT_MODULE_ID);
57 #define MAX_PORTS 2 // Number of ports in system
58 #define PINS_PER_PORT 16 // Number of available pins per port
60 static int port_major = 0;
61 static int danube_port_pin_usage[MAX_PORTS][PINS_PER_PORT]; // Map for pin usage
62 static u32 danube_port_bases[MAX_PORTS]
64 DANUBE_GPIO + 0x00000030
65 }; // Base addresses for ports
67 static struct semaphore port_sem;
70 danube_port_reserve_pin (int port, int pin, int module_id)
72 if (port < 0 || pin < 0)
74 if (port > MAX_PORTS || pin > PINS_PER_PORT)
77 if (danube_port_pin_usage[port][pin] == 0) {
78 danube_port_pin_usage[port][pin] = module_id;
88 danube_port_free_pin (int port, int pin, int module_id)
91 if (port < 0 || pin < 0)
93 if (port > MAX_PORTS || pin > PINS_PER_PORT)
96 if (danube_port_pin_usage[port][pin] != module_id)
98 danube_port_pin_usage[port][pin] = 0;
104 danube_port_set_open_drain (int port, int pin, int module_id)
108 if (port < 0 || pin < 0)
110 if (port > MAX_PORTS || pin > PINS_PER_PORT)
113 if (danube_port_pin_usage[port][pin] != module_id)
116 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
118 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
124 danube_port_clear_open_drain (int port, int pin, int module_id)
128 if (port < 0 || pin < 0)
130 if (port > MAX_PORTS || pin > PINS_PER_PORT)
133 if (danube_port_pin_usage[port][pin] != module_id)
136 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
138 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
144 danube_port_set_pudsel (int port, int pin, int module_id)
148 if (port < 0 || pin < 0)
150 if (port > MAX_PORTS || pin > PINS_PER_PORT)
153 if (danube_port_pin_usage[port][pin] != module_id)
156 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG, reg);
158 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG,
165 danube_port_clear_pudsel (int port, int pin, int module_id)
169 if (port < 0 || pin < 0)
171 if (port > MAX_PORTS || pin > PINS_PER_PORT)
174 if (danube_port_pin_usage[port][pin] != module_id)
177 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG, reg);
179 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG,
186 danube_port_set_puden (int port, int pin, int module_id)
190 if (port < 0 || pin < 0)
192 if (port > MAX_PORTS || pin > PINS_PER_PORT)
195 if (danube_port_pin_usage[port][pin] != module_id)
198 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
200 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
206 danube_port_clear_puden (int port, int pin, int module_id)
210 if (port < 0 || pin < 0)
212 if (port > MAX_PORTS || pin > PINS_PER_PORT)
215 if (danube_port_pin_usage[port][pin] != module_id)
218 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
220 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
226 danube_port_set_stoff (int port, int pin, int module_id)
230 if (port < 0 || pin < 0)
232 if (port > MAX_PORTS || pin > PINS_PER_PORT)
235 if (danube_port_pin_usage[port][pin] != module_id)
238 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
240 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
246 danube_port_clear_stoff (int port, int pin, int module_id)
250 if (port < 0 || pin < 0)
252 if (port > MAX_PORTS || pin > PINS_PER_PORT)
255 if (danube_port_pin_usage[port][pin] != module_id)
258 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
260 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
266 danube_port_set_dir_out (int port, int pin, int module_id)
270 if (port < 0 || pin < 0)
272 if (port > MAX_PORTS || pin > PINS_PER_PORT)
275 if (danube_port_pin_usage[port][pin] != module_id)
278 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
280 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
286 danube_port_set_dir_in (int port, int pin, int module_id)
290 if (port < 0 || pin < 0)
292 if (port > MAX_PORTS || pin > PINS_PER_PORT)
295 if (danube_port_pin_usage[port][pin] != module_id)
298 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
300 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
306 danube_port_set_output (int port, int pin, int module_id)
310 if (port < 0 || pin < 0)
312 if (port > MAX_PORTS || pin > PINS_PER_PORT)
315 if (danube_port_pin_usage[port][pin] != module_id)
318 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
320 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
326 danube_port_clear_output (int port, int pin, int module_id)
330 if (port < 0 || pin < 0)
332 if (port > MAX_PORTS || pin > PINS_PER_PORT)
335 if (danube_port_pin_usage[port][pin] != module_id)
338 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
340 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
346 danube_port_get_input (int port, int pin, int module_id)
350 if (port < 0 || pin < 0)
352 if (port > MAX_PORTS || pin > PINS_PER_PORT)
355 if (danube_port_pin_usage[port][pin] != module_id)
358 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_IN_REG, reg);
367 danube_port_set_altsel0 (int port, int pin, int module_id)
371 if (port < 0 || pin < 0)
373 if (port > MAX_PORTS || pin > PINS_PER_PORT)
376 if (danube_port_pin_usage[port][pin] != module_id)
379 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
382 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
389 danube_port_clear_altsel0 (int port, int pin, int module_id)
393 if (port < 0 || pin < 0)
395 if (port > MAX_PORTS || pin > PINS_PER_PORT)
398 if (danube_port_pin_usage[port][pin] != module_id)
401 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
404 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
411 danube_port_set_altsel1 (int port, int pin, int module_id)
415 if (port < 0 || pin < 0)
417 if (port > MAX_PORTS || pin > PINS_PER_PORT)
420 if (danube_port_pin_usage[port][pin] != module_id)
423 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
426 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
433 danube_port_clear_altsel1 (int port, int pin, int module_id)
437 if (port < 0 || pin < 0)
439 if (port > MAX_PORTS || pin > PINS_PER_PORT)
442 if (danube_port_pin_usage[port][pin] != module_id)
445 PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
448 PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
455 danube_port_read_procmem (char *buf, char **start, off_t offset, int count,
456 int *eof, void *data)
463 len = sprintf (buf, "\nDanube Port Settings\n");
465 len = len + sprintf (buf + len,
467 len = len + sprintf (buf + len,
468 " 10987654321098765432109876543210\n");
469 len = len + sprintf (buf + len,
470 "----------------------------------------\n");
472 len = len + sprintf (buf + len, "\nP0-OUT: ");
473 PORT_READ_REG (DANUBE_GPIO_P0_OUT, reg);
475 for (t = 0; t < 32; t++) {
477 len = len + sprintf (buf + len, "X");
479 len = len + sprintf (buf + len, " ");
483 len = len + sprintf (buf + len, "\nP1-OUT: ");
484 PORT_READ_REG (DANUBE_GPIO_P1_OUT, reg);
486 for (t = 0; t < 32; t++) {
488 len = len + sprintf (buf + len, "X");
490 len = len + sprintf (buf + len, " ");
494 len = len + sprintf (buf + len, "\nP0-IN: ");
495 PORT_READ_REG (DANUBE_GPIO_P0_IN, reg);
497 for (t = 0; t < 32; t++) {
499 len = len + sprintf (buf + len, "X");
501 len = len + sprintf (buf + len, " ");
505 len = len + sprintf (buf + len, "\nP1-IN: ");
506 PORT_READ_REG (DANUBE_GPIO_P1_IN, reg);
508 for (t = 0; t < 32; t++) {
510 len = len + sprintf (buf + len, "X");
512 len = len + sprintf (buf + len, " ");
516 len = len + sprintf (buf + len, "\nP0-DIR: ");
517 PORT_READ_REG (DANUBE_GPIO_P0_DIR, reg);
519 for (t = 0; t < 32; t++) {
521 len = len + sprintf (buf + len, "X");
523 len = len + sprintf (buf + len, " ");
527 len = len + sprintf (buf + len, "\nP1-DIR: ");
528 PORT_READ_REG (DANUBE_GPIO_P1_DIR, reg);
530 for (t = 0; t < 32; t++) {
532 len = len + sprintf (buf + len, "X");
534 len = len + sprintf (buf + len, " ");
538 len = len + sprintf (buf + len, "\nP0-STO: ");
539 PORT_READ_REG (DANUBE_GPIO_P0_STOFF, reg);
541 for (t = 0; t < 32; t++) {
543 len = len + sprintf (buf + len, "X");
545 len = len + sprintf (buf + len, " ");
549 len = len + sprintf (buf + len, "\nP1-STO: ");
550 PORT_READ_REG (DANUBE_GPIO_P1_STOFF, reg);
552 for (t = 0; t < 32; t++) {
554 len = len + sprintf (buf + len, "X");
556 len = len + sprintf (buf + len, " ");
560 len = len + sprintf (buf + len, "\nP0-PUDE:");
561 PORT_READ_REG (DANUBE_GPIO_P0_PUDEN, reg);
563 for (t = 0; t < 32; t++) {
565 len = len + sprintf (buf + len, "X");
567 len = len + sprintf (buf + len, " ");
571 len = len + sprintf (buf + len, "\nP1-PUDE:");
572 PORT_READ_REG (DANUBE_GPIO_P1_PUDEN, reg);
574 for (t = 0; t < 32; t++) {
576 len = len + sprintf (buf + len, "X");
578 len = len + sprintf (buf + len, " ");
582 len = len + sprintf (buf + len, "\nP0-OD: ");
583 PORT_READ_REG (DANUBE_GPIO_P0_OD, reg);
585 for (t = 0; t < 32; t++) {
587 len = len + sprintf (buf + len, "X");
589 len = len + sprintf (buf + len, " ");
593 len = len + sprintf (buf + len, "\nP1-OD: ");
594 PORT_READ_REG (DANUBE_GPIO_P1_OD, reg);
596 for (t = 0; t < 32; t++) {
598 len = len + sprintf (buf + len, "X");
600 len = len + sprintf (buf + len, " ");
604 len = len + sprintf (buf + len, "\nP0-PUDS:");
605 PORT_READ_REG (DANUBE_GPIO_P0_PUDSEL, reg);
607 for (t = 0; t < 32; t++) {
609 len = len + sprintf (buf + len, "X");
611 len = len + sprintf (buf + len, " ");
615 len = len + sprintf (buf + len, "\nP1-PUDS:");
616 PORT_READ_REG (DANUBE_GPIO_P1_PUDSEL, reg);
618 for (t = 0; t < 32; t++) {
620 len = len + sprintf (buf + len, "X");
622 len = len + sprintf (buf + len, " ");
626 len = len + sprintf (buf + len, "\nP0_ALT0:");
627 PORT_READ_REG (DANUBE_GPIO_P0_ALTSEL0, reg);
629 for (t = 0; t < 32; t++) {
631 len = len + sprintf (buf + len, "X");
633 len = len + sprintf (buf + len, " ");
637 len = len + sprintf (buf + len, "\nP0_ALT1:");
638 PORT_READ_REG (DANUBE_GPIO_P0_ALTSEL1, reg);
640 for (t = 0; t < 32; t++) {
642 len = len + sprintf (buf + len, "X");
644 len = len + sprintf (buf + len, " ");
648 len = len + sprintf (buf + len, "\nP1_ALT0:");
649 PORT_READ_REG (DANUBE_GPIO_P1_ALTSEL0, reg);
651 for (t = 0; t < 32; t++) {
653 len = len + sprintf (buf + len, "X");
655 len = len + sprintf (buf + len, " ");
659 len = len + sprintf (buf + len, "\nP1_ALT1:");
660 PORT_READ_REG (DANUBE_GPIO_P1_ALTSEL1, reg);
662 for (t = 0; t < 32; t++) {
664 len = len + sprintf (buf + len, "X");
666 len = len + sprintf (buf + len, " ");
670 len = len + sprintf (buf + len, "\n\n");
672 *eof = 1; // No more data available
677 danube_port_open (struct inode *inode, struct file *filep)
683 danube_port_release (struct inode *inode, struct file *filelp)
689 danube_port_ioctl (struct inode *inode, struct file *filp,
690 unsigned int cmd, unsigned long arg)
693 volatile struct danube_port_ioctl_parm parm;
695 if (_IOC_TYPE (cmd) != DANUBE_PORT_IOC_MAGIC)
698 if (_IOC_DIR (cmd) & _IOC_WRITE) {
701 sizeof (struct danube_port_ioctl_parm)))
703 ret = copy_from_user ((void *) &parm, (void *) arg,
704 sizeof (struct danube_port_ioctl_parm));
706 if (_IOC_DIR (cmd) & _IOC_READ) {
709 sizeof (struct danube_port_ioctl_parm)))
713 if (down_trylock (&port_sem) != 0)
717 case DANUBE_PORT_IOCOD:
718 if (parm.value == 0x00) {
719 PORT_IOC_CALL (ret, parm.port, parm.pin,
720 danube_port_clear_open_drain);
723 PORT_IOC_CALL (ret, parm.port, parm.pin,
724 danube_port_set_open_drain);
727 case DANUBE_PORT_IOCPUDSEL:
728 if (parm.value == 0x00) {
729 PORT_IOC_CALL (ret, parm.port, parm.pin,
730 danube_port_clear_pudsel);
733 PORT_IOC_CALL (ret, parm.port, parm.pin,
734 danube_port_set_pudsel);
737 case DANUBE_PORT_IOCPUDEN:
738 if (parm.value == 0x00) {
739 PORT_IOC_CALL (ret, parm.port, parm.pin,
740 danube_port_clear_puden);
743 PORT_IOC_CALL (ret, parm.port, parm.pin,
744 danube_port_set_puden);
747 case DANUBE_PORT_IOCSTOFF:
748 if (parm.value == 0x00) {
749 PORT_IOC_CALL (ret, parm.port, parm.pin,
750 danube_port_clear_stoff);
753 PORT_IOC_CALL (ret, parm.port, parm.pin,
754 danube_port_set_stoff);
757 case DANUBE_PORT_IOCDIR:
758 if (parm.value == 0x00) {
759 PORT_IOC_CALL (ret, parm.port, parm.pin,
760 danube_port_set_dir_in);
763 PORT_IOC_CALL (ret, parm.port, parm.pin,
764 danube_port_set_dir_out);
767 case DANUBE_PORT_IOCOUTPUT:
768 if (parm.value == 0x00) {
769 PORT_IOC_CALL (ret, parm.port, parm.pin,
770 danube_port_clear_output);
773 PORT_IOC_CALL (ret, parm.port, parm.pin,
774 danube_port_set_output);
777 case DANUBE_PORT_IOCALTSEL0:
778 if (parm.value == 0x00) {
779 PORT_IOC_CALL (ret, parm.port, parm.pin,
780 danube_port_clear_altsel0);
783 PORT_IOC_CALL (ret, parm.port, parm.pin,
784 danube_port_set_altsel0);
787 case DANUBE_PORT_IOCALTSEL1:
788 if (parm.value == 0x00) {
789 PORT_IOC_CALL (ret, parm.port, parm.pin,
790 danube_port_clear_altsel1);
793 PORT_IOC_CALL (ret, parm.port, parm.pin,
794 danube_port_set_altsel1);
797 case DANUBE_PORT_IOCINPUT:
798 ret = danube_port_reserve_pin (parm.port, parm.pin,
802 danube_port_get_input (parm.port, parm.pin,
804 ret = danube_port_free_pin (parm.port, parm.pin,
806 copy_to_user ((void *) arg, (void *) &parm,
807 sizeof (struct danube_port_ioctl_parm));
818 static struct file_operations port_fops = {
819 open:danube_port_open,
820 release:danube_port_release,
821 ioctl:danube_port_ioctl
825 danube_port_init (void)
832 printk ("Danube Port Initialization\n");
834 sema_init (&port_sem, 1);
836 /* Check ports for available pins */
837 for (t = 0; t < MAX_PORTS; t++) {
838 for (i = 0; i < PINS_PER_PORT; i++)
839 danube_port_pin_usage[t][i] = 0;
842 /* register port device */
843 err = register_chrdev (0, "danube-port", &port_fops);
847 printk ("danube-port: Error! Could not register port device. #%d\n", err);
851 /* Create proc file */
852 create_proc_read_entry ("driver/danube_port", 0, NULL,
853 danube_port_read_procmem, NULL);
858 module_init (danube_port_init);
860 EXPORT_SYMBOL (danube_port_reserve_pin);
861 EXPORT_SYMBOL (danube_port_free_pin);
862 EXPORT_SYMBOL (danube_port_set_open_drain);
863 EXPORT_SYMBOL (danube_port_clear_open_drain);
864 EXPORT_SYMBOL (danube_port_set_pudsel);
865 EXPORT_SYMBOL (danube_port_clear_pudsel);
866 EXPORT_SYMBOL (danube_port_set_puden);
867 EXPORT_SYMBOL (danube_port_clear_puden);
868 EXPORT_SYMBOL (danube_port_set_stoff);
869 EXPORT_SYMBOL (danube_port_clear_stoff);
870 EXPORT_SYMBOL (danube_port_set_dir_out);
871 EXPORT_SYMBOL (danube_port_set_dir_in);
872 EXPORT_SYMBOL (danube_port_set_output);
873 EXPORT_SYMBOL (danube_port_clear_output);
874 EXPORT_SYMBOL (danube_port_get_input);
876 EXPORT_SYMBOL (danube_port_set_altsel0);
877 EXPORT_SYMBOL (danube_port_clear_altsel0);
878 EXPORT_SYMBOL (danube_port_set_altsel1);
879 EXPORT_SYMBOL (danube_port_clear_altsel1);