^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * /dev/lcd driver for Apple Network Servers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/miscdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "ans-lcd.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define ANSLCD_ADDR 0xf301c000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define ANSLCD_CTRL_IX 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define ANSLCD_DATA_IX 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static unsigned long anslcd_short_delay = 80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static unsigned long anslcd_long_delay = 3280;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static volatile unsigned char __iomem *anslcd_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static DEFINE_MUTEX(anslcd_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #undef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) anslcd_write_byte_ctrl ( unsigned char c )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) printk(KERN_DEBUG "LCD: CTRL byte: %02x\n",c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) out_8(anslcd_ptr + ANSLCD_CTRL_IX, c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) switch(c) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) case 3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) udelay(anslcd_long_delay); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) default: udelay(anslcd_short_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) anslcd_write_byte_data ( unsigned char c )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) out_8(anslcd_ptr + ANSLCD_DATA_IX, c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) udelay(anslcd_short_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) anslcd_write( struct file * file, const char __user * buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) size_t count, loff_t *ppos )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) const char __user *p = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) printk(KERN_DEBUG "LCD: write\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (!access_ok(buf, count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) mutex_lock(&anslcd_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) for ( i = *ppos; count > 0; ++i, ++p, --count )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) __get_user(c, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) anslcd_write_byte_data( c );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) mutex_unlock(&anslcd_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) *ppos = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return p - buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) anslcd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) char ch, __user *temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) long ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) printk(KERN_DEBUG "LCD: ioctl(%d,%d)\n",cmd,arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) mutex_lock(&anslcd_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) switch ( cmd )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) case ANSLCD_CLEAR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) anslcd_write_byte_ctrl ( 0x38 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) anslcd_write_byte_ctrl ( 0x0f );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) anslcd_write_byte_ctrl ( 0x06 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) anslcd_write_byte_ctrl ( 0x01 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) anslcd_write_byte_ctrl ( 0x02 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) case ANSLCD_SENDCTRL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) temp = (char __user *) arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) __get_user(ch, temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) for (; ch; temp++) { /* FIXME: This is ugly, but should work, as a \0 byte is not a valid command code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) anslcd_write_byte_ctrl ( ch );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) __get_user(ch, temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) case ANSLCD_SETSHORTDELAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ret =-EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) anslcd_short_delay=arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) case ANSLCD_SETLONGDELAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) ret = -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) anslcd_long_delay=arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) mutex_unlock(&anslcd_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) anslcd_open( struct inode * inode, struct file * file )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) const struct file_operations anslcd_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .write = anslcd_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .unlocked_ioctl = anslcd_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .open = anslcd_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static struct miscdevice anslcd_dev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) LCD_MINOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) "anslcd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) &anslcd_fops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static const char anslcd_logo[] __initconst =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) "********************" /* Line #1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) "* LINUX! *" /* Line #3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) "* Welcome to *" /* Line #2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) "********************"; /* Line #4 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static int __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) anslcd_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) int a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct device_node* node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) node = of_find_node_by_name(NULL, "lcd");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (!node || !of_node_name_eq(node->parent, "gc")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) of_node_put(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) of_node_put(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) anslcd_ptr = ioremap(ANSLCD_ADDR, 0x20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) retval = misc_register(&anslcd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if(retval < 0){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) printk(KERN_INFO "LCD: misc_register failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) iounmap(anslcd_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) printk(KERN_DEBUG "LCD: init\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) mutex_lock(&anslcd_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) anslcd_write_byte_ctrl ( 0x38 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) anslcd_write_byte_ctrl ( 0x0c );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) anslcd_write_byte_ctrl ( 0x06 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) anslcd_write_byte_ctrl ( 0x01 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) anslcd_write_byte_ctrl ( 0x02 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) for(a=0;a<80;a++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) anslcd_write_byte_data(anslcd_logo[a]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) mutex_unlock(&anslcd_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static void __exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) anslcd_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) misc_deregister(&anslcd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) iounmap(anslcd_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) module_init(anslcd_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) module_exit(anslcd_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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