^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * ARAnyM console driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * License. See the file COPYING in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/tty_driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/tty_flip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/natfeat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static int stderr_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static struct tty_port nfcon_tty_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static struct tty_driver *nfcon_tty_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static void nfputs(const char *str, unsigned int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) char buf[68];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) unsigned long phys = virt_to_phys(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) buf[64] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) while (count > 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) memcpy(buf, str, 64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) nf_call(stderr_id, phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) str += 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) count -= 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) memcpy(buf, str, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) buf[count] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) nf_call(stderr_id, phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static void nfcon_write(struct console *con, const char *str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) unsigned int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) nfputs(str, count);
^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 struct tty_driver *nfcon_device(struct console *con, int *index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) *index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return (con->flags & CON_ENABLED) ? nfcon_tty_driver : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static struct console nf_console = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .name = "nfcon",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .write = nfcon_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .device = nfcon_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) .flags = CON_PRINTBUFFER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) .index = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static int nfcon_tty_open(struct tty_struct *tty, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static void nfcon_tty_close(struct tty_struct *tty, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static int nfcon_tty_write(struct tty_struct *tty, const unsigned char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) nfputs(buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static int nfcon_tty_put_char(struct tty_struct *tty, unsigned char ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) char temp[2] = { ch, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) nf_call(stderr_id, virt_to_phys(temp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static int nfcon_tty_write_room(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static const struct tty_operations nfcon_tty_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .open = nfcon_tty_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .close = nfcon_tty_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .write = nfcon_tty_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .put_char = nfcon_tty_put_char,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .write_room = nfcon_tty_write_room,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #ifndef MODULE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int __init nf_debug_setup(char *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (strcmp(arg, "nfcon"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) stderr_id = nf_get_id("NF_STDERR");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (stderr_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) nf_console.flags |= CON_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) register_console(&nf_console);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) early_param("debug", nf_debug_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #endif /* !MODULE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static int __init nfcon_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) stderr_id = nf_get_id("NF_STDERR");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (!stderr_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) nfcon_tty_driver = alloc_tty_driver(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!nfcon_tty_driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) tty_port_init(&nfcon_tty_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) nfcon_tty_driver->driver_name = "nfcon";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) nfcon_tty_driver->name = "nfcon";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) nfcon_tty_driver->type = TTY_DRIVER_TYPE_SYSTEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) nfcon_tty_driver->subtype = SYSTEM_TYPE_TTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) nfcon_tty_driver->init_termios = tty_std_termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) nfcon_tty_driver->flags = TTY_DRIVER_REAL_RAW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) tty_set_operations(nfcon_tty_driver, &nfcon_tty_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) tty_port_link_device(&nfcon_tty_port, nfcon_tty_driver, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) res = tty_register_driver(nfcon_tty_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) pr_err("failed to register nfcon tty driver\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) put_tty_driver(nfcon_tty_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) tty_port_destroy(&nfcon_tty_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (!(nf_console.flags & CON_ENABLED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) register_console(&nf_console);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static void __exit nfcon_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) unregister_console(&nf_console);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) tty_unregister_driver(nfcon_tty_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) put_tty_driver(nfcon_tty_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) tty_port_destroy(&nfcon_tty_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) module_init(nfcon_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) module_exit(nfcon_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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