1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/init.h> 3 #include <linux/errno.h> 4 #include <linux/console.h> 5 6 #include <asm/sibyte/board.h> 7 8 #include <asm/fw/cfe/cfe_api.h> 9 #include <asm/fw/cfe/cfe_error.h> 10 11 extern int cfe_cons_handle; 12 13 static void cfe_console_write(struct console *cons, const char *str, 14 unsigned int count) 15 { 16 int i, last, written; 17 18 for (i=0, last=0; i<count; i++) { 19 if (!str[i]) 20 /* XXXKW can/should this ever happen? */ 21 return; 22 if (str[i] == '\n') { 23 do { 24 written = cfe_write(cfe_cons_handle, &str[last], i-last); 25 if (written < 0) 26 ; 27 last += written; 28 } while (last < i); 29 while (cfe_write(cfe_cons_handle, "\r", 1) <= 0) 30 ; 31 } 32 } 33 if (last != count) { 34 do { 35 written = cfe_write(cfe_cons_handle, &str[last], count-last); 36 if (written < 0) 37 ; 38 last += written; 39 } while (last < count); 40 } 41 42 } 43 44 static int cfe_console_setup(struct console *cons, char *str) 45 { 46 char consdev[32]; 47 /* XXXKW think about interaction with 'console=' cmdline arg */ 48 /* If none of the console options are configured, the build will break. */ 49 if (cfe_getenv("BOOT_CONSOLE", consdev, 32) >= 0) { 50 #ifdef CONFIG_SERIAL_SB1250_DUART 51 if (!strcmp(consdev, "uart0")) { 52 setleds("u0cn"); 53 } else if (!strcmp(consdev, "uart1")) { 54 setleds("u1cn"); 55 } else 56 #endif 57 #ifdef CONFIG_VGA_CONSOLE 58 if (!strcmp(consdev, "pcconsole0")) { 59 setleds("pccn"); 60 } else 61 #endif 62 return -ENODEV; 63 } 64 return 0; 65 } 66 67 static struct console sb1250_cfe_cons = { 68 .name = "cfe", 69 .write = cfe_console_write, 70 .setup = cfe_console_setup, 71 .flags = CON_PRINTBUFFER, 72 .index = -1, 73 }; 74 75 static int __init sb1250_cfe_console_init(void) 76 { 77 register_console(&sb1250_cfe_cons); 78 return 0; 79 } 80 81 console_initcall(sb1250_cfe_console_init); 82