17742aa65SMarek Vasut /* 27742aa65SMarek Vasut * (C) Copyright 2004 37742aa65SMarek Vasut * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 47742aa65SMarek Vasut * 57742aa65SMarek Vasut * See file CREDITS for list of people who contributed to this 67742aa65SMarek Vasut * project. 77742aa65SMarek Vasut * 87742aa65SMarek Vasut * This program is free software; you can redistribute it and/or 97742aa65SMarek Vasut * modify it under the terms of the GNU General Public License as 107742aa65SMarek Vasut * published by the Free Software Foundation; either version 2 of 117742aa65SMarek Vasut * the License, or (at your option) any later version. 127742aa65SMarek Vasut * 137742aa65SMarek Vasut * This program is distributed in the hope that it will be useful, 147742aa65SMarek Vasut * but WITHOUT ANY WARRANTY; without even the implied warranty of 157742aa65SMarek Vasut * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 167742aa65SMarek Vasut * GNU General Public License for more details. 177742aa65SMarek Vasut * 187742aa65SMarek Vasut * You should have received a copy of the GNU General Public License 197742aa65SMarek Vasut * along with this program; if not, write to the Free Software 207742aa65SMarek Vasut * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 217742aa65SMarek Vasut * MA 02111-1307 USA 227742aa65SMarek Vasut */ 237742aa65SMarek Vasut 247742aa65SMarek Vasut #include <common.h> 25*32057717SJoe Hershberger #include <environment.h> 267742aa65SMarek Vasut #include <serial.h> 277742aa65SMarek Vasut #include <stdio_dev.h> 287742aa65SMarek Vasut #include <post.h> 297742aa65SMarek Vasut #include <linux/compiler.h> 306d93e258SMarek Vasut #include <errno.h> 317742aa65SMarek Vasut 327742aa65SMarek Vasut DECLARE_GLOBAL_DATA_PTR; 337742aa65SMarek Vasut 347742aa65SMarek Vasut static struct serial_device *serial_devices; 357742aa65SMarek Vasut static struct serial_device *serial_current; 36*32057717SJoe Hershberger /* 37*32057717SJoe Hershberger * Table with supported baudrates (defined in config_xyz.h) 38*32057717SJoe Hershberger */ 39*32057717SJoe Hershberger static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE; 40*32057717SJoe Hershberger #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0])) 417742aa65SMarek Vasut 429cd2b9e4SMarek Vasut /** 439cd2b9e4SMarek Vasut * serial_null() - Void registration routine of a serial driver 449cd2b9e4SMarek Vasut * 459cd2b9e4SMarek Vasut * This routine implements a void registration routine of a serial 469cd2b9e4SMarek Vasut * driver. The registration routine of a particular driver is aliased 479cd2b9e4SMarek Vasut * to this empty function in case the driver is not compiled into 489cd2b9e4SMarek Vasut * U-Boot. 499cd2b9e4SMarek Vasut */ 507742aa65SMarek Vasut static void serial_null(void) 517742aa65SMarek Vasut { 527742aa65SMarek Vasut } 537742aa65SMarek Vasut 549cd2b9e4SMarek Vasut /** 55*32057717SJoe Hershberger * on_baudrate() - Update the actual baudrate when the env var changes 56*32057717SJoe Hershberger * 57*32057717SJoe Hershberger * This will check for a valid baudrate and only apply it if valid. 58*32057717SJoe Hershberger */ 59*32057717SJoe Hershberger static int on_baudrate(const char *name, const char *value, enum env_op op, 60*32057717SJoe Hershberger int flags) 61*32057717SJoe Hershberger { 62*32057717SJoe Hershberger int i; 63*32057717SJoe Hershberger int baudrate; 64*32057717SJoe Hershberger 65*32057717SJoe Hershberger switch (op) { 66*32057717SJoe Hershberger case env_op_create: 67*32057717SJoe Hershberger case env_op_overwrite: 68*32057717SJoe Hershberger /* 69*32057717SJoe Hershberger * Switch to new baudrate if new baudrate is supported 70*32057717SJoe Hershberger */ 71*32057717SJoe Hershberger baudrate = simple_strtoul(value, NULL, 10); 72*32057717SJoe Hershberger 73*32057717SJoe Hershberger /* Not actually changing */ 74*32057717SJoe Hershberger if (gd->baudrate == baudrate) 75*32057717SJoe Hershberger return 0; 76*32057717SJoe Hershberger 77*32057717SJoe Hershberger for (i = 0; i < N_BAUDRATES; ++i) { 78*32057717SJoe Hershberger if (baudrate == baudrate_table[i]) 79*32057717SJoe Hershberger break; 80*32057717SJoe Hershberger } 81*32057717SJoe Hershberger if (i == N_BAUDRATES) { 82*32057717SJoe Hershberger if ((flags & H_FORCE) == 0) 83*32057717SJoe Hershberger printf("## Baudrate %d bps not supported\n", 84*32057717SJoe Hershberger baudrate); 85*32057717SJoe Hershberger return 1; 86*32057717SJoe Hershberger } 87*32057717SJoe Hershberger if ((flags & H_INTERACTIVE) != 0) { 88*32057717SJoe Hershberger printf("## Switch baudrate to %d" 89*32057717SJoe Hershberger " bps and press ENTER ...\n", baudrate); 90*32057717SJoe Hershberger udelay(50000); 91*32057717SJoe Hershberger } 92*32057717SJoe Hershberger 93*32057717SJoe Hershberger gd->baudrate = baudrate; 94*32057717SJoe Hershberger #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2) 95*32057717SJoe Hershberger gd->bd->bi_baudrate = baudrate; 96*32057717SJoe Hershberger #endif 97*32057717SJoe Hershberger 98*32057717SJoe Hershberger serial_setbrg(); 99*32057717SJoe Hershberger 100*32057717SJoe Hershberger udelay(50000); 101*32057717SJoe Hershberger 102*32057717SJoe Hershberger if ((flags & H_INTERACTIVE) != 0) 103*32057717SJoe Hershberger while (1) { 104*32057717SJoe Hershberger if (getc() == '\r') 105*32057717SJoe Hershberger break; 106*32057717SJoe Hershberger } 107*32057717SJoe Hershberger 108*32057717SJoe Hershberger return 0; 109*32057717SJoe Hershberger case env_op_delete: 110*32057717SJoe Hershberger printf("## Baudrate may not be deleted\n"); 111*32057717SJoe Hershberger return 1; 112*32057717SJoe Hershberger default: 113*32057717SJoe Hershberger return 0; 114*32057717SJoe Hershberger } 115*32057717SJoe Hershberger } 116*32057717SJoe Hershberger U_BOOT_ENV_CALLBACK(baudrate, on_baudrate); 117*32057717SJoe Hershberger 118*32057717SJoe Hershberger /** 1199cd2b9e4SMarek Vasut * serial_initfunc() - Forward declare of driver registration routine 1209cd2b9e4SMarek Vasut * @name: Name of the real driver registration routine. 1219cd2b9e4SMarek Vasut * 1229cd2b9e4SMarek Vasut * This macro expands onto forward declaration of a driver registration 1239cd2b9e4SMarek Vasut * routine, which is then used below in serial_initialize() function. 1249cd2b9e4SMarek Vasut * The declaration is made weak and aliases to serial_null() so in case 1259cd2b9e4SMarek Vasut * the driver is not compiled in, the function is still declared and can 1269cd2b9e4SMarek Vasut * be used, but aliases to serial_null() and thus is optimized away. 1279cd2b9e4SMarek Vasut */ 1287742aa65SMarek Vasut #define serial_initfunc(name) \ 1297742aa65SMarek Vasut void name(void) \ 1307742aa65SMarek Vasut __attribute__((weak, alias("serial_null"))); 1317742aa65SMarek Vasut 1327742aa65SMarek Vasut serial_initfunc(mpc8xx_serial_initialize); 1337742aa65SMarek Vasut serial_initfunc(ns16550_serial_initialize); 1347742aa65SMarek Vasut serial_initfunc(pxa_serial_initialize); 1357742aa65SMarek Vasut serial_initfunc(s3c24xx_serial_initialize); 1367742aa65SMarek Vasut serial_initfunc(s5p_serial_initialize); 1377742aa65SMarek Vasut serial_initfunc(zynq_serial_initalize); 1387742aa65SMarek Vasut serial_initfunc(bfin_serial_initialize); 1397742aa65SMarek Vasut serial_initfunc(bfin_jtag_initialize); 1407742aa65SMarek Vasut serial_initfunc(mpc512x_serial_initialize); 1417742aa65SMarek Vasut serial_initfunc(uartlite_serial_initialize); 1427742aa65SMarek Vasut serial_initfunc(au1x00_serial_initialize); 1437742aa65SMarek Vasut serial_initfunc(asc_serial_initialize); 1447742aa65SMarek Vasut serial_initfunc(jz_serial_initialize); 1457742aa65SMarek Vasut serial_initfunc(mpc5xx_serial_initialize); 1467742aa65SMarek Vasut serial_initfunc(mpc8220_serial_initialize); 1477742aa65SMarek Vasut serial_initfunc(mpc8260_scc_serial_initialize); 1487742aa65SMarek Vasut serial_initfunc(mpc8260_smc_serial_initialize); 1497742aa65SMarek Vasut serial_initfunc(mpc85xx_serial_initialize); 1507742aa65SMarek Vasut serial_initfunc(iop480_serial_initialize); 1517742aa65SMarek Vasut serial_initfunc(leon2_serial_initialize); 1527742aa65SMarek Vasut serial_initfunc(leon3_serial_initialize); 1537742aa65SMarek Vasut serial_initfunc(marvell_serial_initialize); 1547742aa65SMarek Vasut serial_initfunc(amirix_serial_initialize); 1557742aa65SMarek Vasut serial_initfunc(bmw_serial_initialize); 1567742aa65SMarek Vasut serial_initfunc(cogent_serial_initialize); 1577742aa65SMarek Vasut serial_initfunc(cpci750_serial_initialize); 1587742aa65SMarek Vasut serial_initfunc(evb64260_serial_initialize); 1597742aa65SMarek Vasut serial_initfunc(ml2_serial_initialize); 1607742aa65SMarek Vasut serial_initfunc(sconsole_serial_initialize); 1617742aa65SMarek Vasut serial_initfunc(p3mx_serial_initialize); 1627742aa65SMarek Vasut serial_initfunc(altera_jtag_serial_initialize); 1637742aa65SMarek Vasut serial_initfunc(altera_serial_initialize); 1647742aa65SMarek Vasut serial_initfunc(atmel_serial_initialize); 1657742aa65SMarek Vasut serial_initfunc(lpc32xx_serial_initialize); 1667742aa65SMarek Vasut serial_initfunc(mcf_serial_initialize); 1677742aa65SMarek Vasut serial_initfunc(ns9750_serial_initialize); 1687742aa65SMarek Vasut serial_initfunc(oc_serial_initialize); 1697742aa65SMarek Vasut serial_initfunc(s3c64xx_serial_initialize); 1707742aa65SMarek Vasut serial_initfunc(sandbox_serial_initialize); 1717742aa65SMarek Vasut serial_initfunc(clps7111_serial_initialize); 1727742aa65SMarek Vasut serial_initfunc(imx_serial_initialize); 1737742aa65SMarek Vasut serial_initfunc(ixp_serial_initialize); 1747742aa65SMarek Vasut serial_initfunc(ks8695_serial_initialize); 1757742aa65SMarek Vasut serial_initfunc(lh7a40x_serial_initialize); 1767742aa65SMarek Vasut serial_initfunc(max3100_serial_initialize); 1777742aa65SMarek Vasut serial_initfunc(mxc_serial_initialize); 1787742aa65SMarek Vasut serial_initfunc(pl01x_serial_initialize); 1797742aa65SMarek Vasut serial_initfunc(s3c44b0_serial_initialize); 1807742aa65SMarek Vasut serial_initfunc(sa1100_serial_initialize); 1817742aa65SMarek Vasut serial_initfunc(sh_serial_initialize); 1827742aa65SMarek Vasut 1839cd2b9e4SMarek Vasut /** 1849cd2b9e4SMarek Vasut * serial_register() - Register serial driver with serial driver core 1859cd2b9e4SMarek Vasut * @dev: Pointer to the serial driver structure 1869cd2b9e4SMarek Vasut * 1879cd2b9e4SMarek Vasut * This function registers the serial driver supplied via @dev with 1889cd2b9e4SMarek Vasut * serial driver core, thus making U-Boot aware of it and making it 1899cd2b9e4SMarek Vasut * available for U-Boot to use. On platforms that still require manual 1909cd2b9e4SMarek Vasut * relocation of constant variables, relocation of the supplied structure 1919cd2b9e4SMarek Vasut * is performed. 1929cd2b9e4SMarek Vasut */ 1937742aa65SMarek Vasut void serial_register(struct serial_device *dev) 1947742aa65SMarek Vasut { 1957742aa65SMarek Vasut #ifdef CONFIG_NEEDS_MANUAL_RELOC 196f2760c4aSMarek Vasut if (dev->start) 1977742aa65SMarek Vasut dev->start += gd->reloc_off; 198f2760c4aSMarek Vasut if (dev->stop) 199f2760c4aSMarek Vasut dev->stop += gd->reloc_off; 200f2760c4aSMarek Vasut if (dev->setbrg) 2017742aa65SMarek Vasut dev->setbrg += gd->reloc_off; 202f2760c4aSMarek Vasut if (dev->getc) 2037742aa65SMarek Vasut dev->getc += gd->reloc_off; 204f2760c4aSMarek Vasut if (dev->tstc) 2057742aa65SMarek Vasut dev->tstc += gd->reloc_off; 206f2760c4aSMarek Vasut if (dev->putc) 2077742aa65SMarek Vasut dev->putc += gd->reloc_off; 208f2760c4aSMarek Vasut if (dev->puts) 2097742aa65SMarek Vasut dev->puts += gd->reloc_off; 2107742aa65SMarek Vasut #endif 2117742aa65SMarek Vasut 2127742aa65SMarek Vasut dev->next = serial_devices; 2137742aa65SMarek Vasut serial_devices = dev; 2147742aa65SMarek Vasut } 2157742aa65SMarek Vasut 2169cd2b9e4SMarek Vasut /** 2179cd2b9e4SMarek Vasut * serial_initialize() - Register all compiled-in serial port drivers 2189cd2b9e4SMarek Vasut * 2199cd2b9e4SMarek Vasut * This function registers all serial port drivers that are compiled 2209cd2b9e4SMarek Vasut * into the U-Boot binary with the serial core, thus making them 2219cd2b9e4SMarek Vasut * available to U-Boot to use. Lastly, this function assigns a default 2229cd2b9e4SMarek Vasut * serial port to the serial core. That serial port is then used as a 2239cd2b9e4SMarek Vasut * default output. 2249cd2b9e4SMarek Vasut */ 2257742aa65SMarek Vasut void serial_initialize(void) 2267742aa65SMarek Vasut { 2277742aa65SMarek Vasut mpc8xx_serial_initialize(); 2287742aa65SMarek Vasut ns16550_serial_initialize(); 2297742aa65SMarek Vasut pxa_serial_initialize(); 2307742aa65SMarek Vasut s3c24xx_serial_initialize(); 2317742aa65SMarek Vasut s5p_serial_initialize(); 2327742aa65SMarek Vasut mpc512x_serial_initialize(); 2337742aa65SMarek Vasut bfin_serial_initialize(); 2347742aa65SMarek Vasut bfin_jtag_initialize(); 2357742aa65SMarek Vasut uartlite_serial_initialize(); 2367742aa65SMarek Vasut zynq_serial_initalize(); 2377742aa65SMarek Vasut au1x00_serial_initialize(); 2387742aa65SMarek Vasut asc_serial_initialize(); 2397742aa65SMarek Vasut jz_serial_initialize(); 2407742aa65SMarek Vasut mpc5xx_serial_initialize(); 2417742aa65SMarek Vasut mpc8220_serial_initialize(); 2427742aa65SMarek Vasut mpc8260_scc_serial_initialize(); 2437742aa65SMarek Vasut mpc8260_smc_serial_initialize(); 2447742aa65SMarek Vasut mpc85xx_serial_initialize(); 2457742aa65SMarek Vasut iop480_serial_initialize(); 2467742aa65SMarek Vasut leon2_serial_initialize(); 2477742aa65SMarek Vasut leon3_serial_initialize(); 2487742aa65SMarek Vasut marvell_serial_initialize(); 2497742aa65SMarek Vasut amirix_serial_initialize(); 2507742aa65SMarek Vasut bmw_serial_initialize(); 2517742aa65SMarek Vasut cogent_serial_initialize(); 2527742aa65SMarek Vasut cpci750_serial_initialize(); 2537742aa65SMarek Vasut evb64260_serial_initialize(); 2547742aa65SMarek Vasut ml2_serial_initialize(); 2557742aa65SMarek Vasut sconsole_serial_initialize(); 2567742aa65SMarek Vasut p3mx_serial_initialize(); 2577742aa65SMarek Vasut altera_jtag_serial_initialize(); 2587742aa65SMarek Vasut altera_serial_initialize(); 2597742aa65SMarek Vasut atmel_serial_initialize(); 2607742aa65SMarek Vasut lpc32xx_serial_initialize(); 2617742aa65SMarek Vasut mcf_serial_initialize(); 2627742aa65SMarek Vasut ns9750_serial_initialize(); 2637742aa65SMarek Vasut oc_serial_initialize(); 2647742aa65SMarek Vasut s3c64xx_serial_initialize(); 2657742aa65SMarek Vasut sandbox_serial_initialize(); 2667742aa65SMarek Vasut clps7111_serial_initialize(); 2677742aa65SMarek Vasut imx_serial_initialize(); 2687742aa65SMarek Vasut ixp_serial_initialize(); 2697742aa65SMarek Vasut ks8695_serial_initialize(); 2707742aa65SMarek Vasut lh7a40x_serial_initialize(); 2717742aa65SMarek Vasut max3100_serial_initialize(); 2727742aa65SMarek Vasut mxc_serial_initialize(); 2737742aa65SMarek Vasut pl01x_serial_initialize(); 2747742aa65SMarek Vasut s3c44b0_serial_initialize(); 2757742aa65SMarek Vasut sa1100_serial_initialize(); 2767742aa65SMarek Vasut sh_serial_initialize(); 2777742aa65SMarek Vasut 2787742aa65SMarek Vasut serial_assign(default_serial_console()->name); 2797742aa65SMarek Vasut } 2807742aa65SMarek Vasut 2819cd2b9e4SMarek Vasut /** 2829cd2b9e4SMarek Vasut * serial_stdio_init() - Register serial ports with STDIO core 2839cd2b9e4SMarek Vasut * 2849cd2b9e4SMarek Vasut * This function generates a proxy driver for each serial port driver. 2859cd2b9e4SMarek Vasut * These proxy drivers then register with the STDIO core, making the 2869cd2b9e4SMarek Vasut * serial drivers available as STDIO devices. 2879cd2b9e4SMarek Vasut */ 2887742aa65SMarek Vasut void serial_stdio_init(void) 2897742aa65SMarek Vasut { 2907742aa65SMarek Vasut struct stdio_dev dev; 2917742aa65SMarek Vasut struct serial_device *s = serial_devices; 2927742aa65SMarek Vasut 2937742aa65SMarek Vasut while (s) { 2947742aa65SMarek Vasut memset(&dev, 0, sizeof(dev)); 2957742aa65SMarek Vasut 2967742aa65SMarek Vasut strcpy(dev.name, s->name); 2977742aa65SMarek Vasut dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT; 2987742aa65SMarek Vasut 2997742aa65SMarek Vasut dev.start = s->start; 3007742aa65SMarek Vasut dev.stop = s->stop; 3017742aa65SMarek Vasut dev.putc = s->putc; 3027742aa65SMarek Vasut dev.puts = s->puts; 3037742aa65SMarek Vasut dev.getc = s->getc; 3047742aa65SMarek Vasut dev.tstc = s->tstc; 3057742aa65SMarek Vasut 3067742aa65SMarek Vasut stdio_register(&dev); 3077742aa65SMarek Vasut 3087742aa65SMarek Vasut s = s->next; 3097742aa65SMarek Vasut } 3107742aa65SMarek Vasut } 3117742aa65SMarek Vasut 3129cd2b9e4SMarek Vasut /** 3139cd2b9e4SMarek Vasut * serial_assign() - Select the serial output device by name 3149cd2b9e4SMarek Vasut * @name: Name of the serial driver to be used as default output 3159cd2b9e4SMarek Vasut * 3169cd2b9e4SMarek Vasut * This function configures the serial output multiplexing by 3179cd2b9e4SMarek Vasut * selecting which serial device will be used as default. In case 3189cd2b9e4SMarek Vasut * the STDIO "serial" device is selected as stdin/stdout/stderr, 3199cd2b9e4SMarek Vasut * the serial device previously configured by this function will be 3209cd2b9e4SMarek Vasut * used for the particular operation. 3219cd2b9e4SMarek Vasut * 3229cd2b9e4SMarek Vasut * Returns 0 on success, negative on error. 3239cd2b9e4SMarek Vasut */ 3247742aa65SMarek Vasut int serial_assign(const char *name) 3257742aa65SMarek Vasut { 3267742aa65SMarek Vasut struct serial_device *s; 3277742aa65SMarek Vasut 3287742aa65SMarek Vasut for (s = serial_devices; s; s = s->next) { 3296d93e258SMarek Vasut if (strcmp(s->name, name)) 3306d93e258SMarek Vasut continue; 3317742aa65SMarek Vasut serial_current = s; 3327742aa65SMarek Vasut return 0; 3337742aa65SMarek Vasut } 3347742aa65SMarek Vasut 3356d93e258SMarek Vasut return -EINVAL; 3367742aa65SMarek Vasut } 3377742aa65SMarek Vasut 3389cd2b9e4SMarek Vasut /** 3399cd2b9e4SMarek Vasut * serial_reinit_all() - Reinitialize all compiled-in serial ports 3409cd2b9e4SMarek Vasut * 3419cd2b9e4SMarek Vasut * This function reinitializes all serial ports that are compiled 3429cd2b9e4SMarek Vasut * into U-Boot by calling their serial_start() functions. 3439cd2b9e4SMarek Vasut */ 3447742aa65SMarek Vasut void serial_reinit_all(void) 3457742aa65SMarek Vasut { 3467742aa65SMarek Vasut struct serial_device *s; 3477742aa65SMarek Vasut 3487742aa65SMarek Vasut for (s = serial_devices; s; s = s->next) 3497742aa65SMarek Vasut s->start(); 3507742aa65SMarek Vasut } 3517742aa65SMarek Vasut 3529cd2b9e4SMarek Vasut /** 3539cd2b9e4SMarek Vasut * get_current() - Return pointer to currently selected serial port 3549cd2b9e4SMarek Vasut * 3559cd2b9e4SMarek Vasut * This function returns a pointer to currently selected serial port. 3569cd2b9e4SMarek Vasut * The currently selected serial port is altered by serial_assign() 3579cd2b9e4SMarek Vasut * function. 3589cd2b9e4SMarek Vasut * 3599cd2b9e4SMarek Vasut * In case this function is called before relocation or before any serial 3609cd2b9e4SMarek Vasut * port is configured, this function calls default_serial_console() to 3619cd2b9e4SMarek Vasut * determine the serial port. Otherwise, the configured serial port is 3629cd2b9e4SMarek Vasut * returned. 3639cd2b9e4SMarek Vasut * 3649cd2b9e4SMarek Vasut * Returns pointer to the currently selected serial port on success, 3659cd2b9e4SMarek Vasut * NULL on error. 3669cd2b9e4SMarek Vasut */ 3677742aa65SMarek Vasut static struct serial_device *get_current(void) 3687742aa65SMarek Vasut { 3697742aa65SMarek Vasut struct serial_device *dev; 3707742aa65SMarek Vasut 371dee19416SMarek Vasut if (!(gd->flags & GD_FLG_RELOC)) 3727742aa65SMarek Vasut dev = default_serial_console(); 373dee19416SMarek Vasut else if (!serial_current) 374dee19416SMarek Vasut dev = default_serial_console(); 375dee19416SMarek Vasut else 376dee19416SMarek Vasut dev = serial_current; 3777742aa65SMarek Vasut 3787742aa65SMarek Vasut /* We must have a console device */ 3797742aa65SMarek Vasut if (!dev) { 3807742aa65SMarek Vasut #ifdef CONFIG_SPL_BUILD 3817742aa65SMarek Vasut puts("Cannot find console\n"); 3827742aa65SMarek Vasut hang(); 3837742aa65SMarek Vasut #else 3847742aa65SMarek Vasut panic("Cannot find console\n"); 3857742aa65SMarek Vasut #endif 3867742aa65SMarek Vasut } 387dee19416SMarek Vasut 3887742aa65SMarek Vasut return dev; 3897742aa65SMarek Vasut } 3907742aa65SMarek Vasut 3919cd2b9e4SMarek Vasut /** 3929cd2b9e4SMarek Vasut * serial_init() - Initialize currently selected serial port 3939cd2b9e4SMarek Vasut * 3949cd2b9e4SMarek Vasut * This function initializes the currently selected serial port. This 3959cd2b9e4SMarek Vasut * usually involves setting up the registers of that particular port, 3969cd2b9e4SMarek Vasut * enabling clock and such. This function uses the get_current() call 3979cd2b9e4SMarek Vasut * to determine which port is selected. 3989cd2b9e4SMarek Vasut * 3999cd2b9e4SMarek Vasut * Returns 0 on success, negative on error. 4009cd2b9e4SMarek Vasut */ 4017742aa65SMarek Vasut int serial_init(void) 4027742aa65SMarek Vasut { 4037742aa65SMarek Vasut return get_current()->start(); 4047742aa65SMarek Vasut } 4057742aa65SMarek Vasut 4069cd2b9e4SMarek Vasut /** 4079cd2b9e4SMarek Vasut * serial_setbrg() - Configure baud-rate of currently selected serial port 4089cd2b9e4SMarek Vasut * 4099cd2b9e4SMarek Vasut * This function configures the baud-rate of the currently selected 4109cd2b9e4SMarek Vasut * serial port. The baud-rate is retrieved from global data within 4119cd2b9e4SMarek Vasut * the serial port driver. This function uses the get_current() call 4129cd2b9e4SMarek Vasut * to determine which port is selected. 4139cd2b9e4SMarek Vasut * 4149cd2b9e4SMarek Vasut * Returns 0 on success, negative on error. 4159cd2b9e4SMarek Vasut */ 4167742aa65SMarek Vasut void serial_setbrg(void) 4177742aa65SMarek Vasut { 4187742aa65SMarek Vasut get_current()->setbrg(); 4197742aa65SMarek Vasut } 4207742aa65SMarek Vasut 4219cd2b9e4SMarek Vasut /** 4229cd2b9e4SMarek Vasut * serial_getc() - Read character from currently selected serial port 4239cd2b9e4SMarek Vasut * 4249cd2b9e4SMarek Vasut * This function retrieves a character from currently selected serial 4259cd2b9e4SMarek Vasut * port. In case there is no character waiting on the serial port, 4269cd2b9e4SMarek Vasut * this function will block and wait for the character to appear. This 4279cd2b9e4SMarek Vasut * function uses the get_current() call to determine which port is 4289cd2b9e4SMarek Vasut * selected. 4299cd2b9e4SMarek Vasut * 4309cd2b9e4SMarek Vasut * Returns the character on success, negative on error. 4319cd2b9e4SMarek Vasut */ 4327742aa65SMarek Vasut int serial_getc(void) 4337742aa65SMarek Vasut { 4347742aa65SMarek Vasut return get_current()->getc(); 4357742aa65SMarek Vasut } 4367742aa65SMarek Vasut 4379cd2b9e4SMarek Vasut /** 4389cd2b9e4SMarek Vasut * serial_tstc() - Test if data is available on currently selected serial port 4399cd2b9e4SMarek Vasut * 4409cd2b9e4SMarek Vasut * This function tests if one or more characters are available on 4419cd2b9e4SMarek Vasut * currently selected serial port. This function never blocks. This 4429cd2b9e4SMarek Vasut * function uses the get_current() call to determine which port is 4439cd2b9e4SMarek Vasut * selected. 4449cd2b9e4SMarek Vasut * 4459cd2b9e4SMarek Vasut * Returns positive if character is available, zero otherwise. 4469cd2b9e4SMarek Vasut */ 4477742aa65SMarek Vasut int serial_tstc(void) 4487742aa65SMarek Vasut { 4497742aa65SMarek Vasut return get_current()->tstc(); 4507742aa65SMarek Vasut } 4517742aa65SMarek Vasut 4529cd2b9e4SMarek Vasut /** 4539cd2b9e4SMarek Vasut * serial_putc() - Output character via currently selected serial port 4549cd2b9e4SMarek Vasut * @c: Single character to be output from the serial port. 4559cd2b9e4SMarek Vasut * 4569cd2b9e4SMarek Vasut * This function outputs a character via currently selected serial 4579cd2b9e4SMarek Vasut * port. This character is passed to the serial port driver responsible 4589cd2b9e4SMarek Vasut * for controlling the hardware. The hardware may still be in process 4599cd2b9e4SMarek Vasut * of transmitting another character, therefore this function may block 4609cd2b9e4SMarek Vasut * for a short amount of time. This function uses the get_current() 4619cd2b9e4SMarek Vasut * call to determine which port is selected. 4629cd2b9e4SMarek Vasut */ 4637742aa65SMarek Vasut void serial_putc(const char c) 4647742aa65SMarek Vasut { 4657742aa65SMarek Vasut get_current()->putc(c); 4667742aa65SMarek Vasut } 4677742aa65SMarek Vasut 4689cd2b9e4SMarek Vasut /** 4699cd2b9e4SMarek Vasut * serial_puts() - Output string via currently selected serial port 4709cd2b9e4SMarek Vasut * @s: Zero-terminated string to be output from the serial port. 4719cd2b9e4SMarek Vasut * 4729cd2b9e4SMarek Vasut * This function outputs a zero-terminated string via currently 4739cd2b9e4SMarek Vasut * selected serial port. This function behaves as an accelerator 4749cd2b9e4SMarek Vasut * in case the hardware can queue multiple characters for transfer. 4759cd2b9e4SMarek Vasut * The whole string that is to be output is available to the function 4769cd2b9e4SMarek Vasut * implementing the hardware manipulation. Transmitting the whole 4779cd2b9e4SMarek Vasut * string may take some time, thus this function may block for some 4789cd2b9e4SMarek Vasut * amount of time. This function uses the get_current() call to 4799cd2b9e4SMarek Vasut * determine which port is selected. 4809cd2b9e4SMarek Vasut */ 4817742aa65SMarek Vasut void serial_puts(const char *s) 4827742aa65SMarek Vasut { 4837742aa65SMarek Vasut get_current()->puts(s); 4847742aa65SMarek Vasut } 4857742aa65SMarek Vasut 4869cd2b9e4SMarek Vasut /** 4879cd2b9e4SMarek Vasut * default_serial_puts() - Output string by calling serial_putc() in loop 4889cd2b9e4SMarek Vasut * @s: Zero-terminated string to be output from the serial port. 4899cd2b9e4SMarek Vasut * 4909cd2b9e4SMarek Vasut * This function outputs a zero-terminated string by calling serial_putc() 4919cd2b9e4SMarek Vasut * in a loop. Most drivers do not support queueing more than one byte for 4929cd2b9e4SMarek Vasut * transfer, thus this function precisely implements their serial_puts(). 4939cd2b9e4SMarek Vasut * 4949cd2b9e4SMarek Vasut * To optimize the number of get_current() calls, this function only 4959cd2b9e4SMarek Vasut * calls get_current() once and then directly accesses the putc() call 4969cd2b9e4SMarek Vasut * of the &struct serial_device . 4979cd2b9e4SMarek Vasut */ 498bfb7d7a3SMarek Vasut void default_serial_puts(const char *s) 499bfb7d7a3SMarek Vasut { 500bfb7d7a3SMarek Vasut struct serial_device *dev = get_current(); 501bfb7d7a3SMarek Vasut while (*s) 502bfb7d7a3SMarek Vasut dev->putc(*s++); 503bfb7d7a3SMarek Vasut } 504bfb7d7a3SMarek Vasut 5057742aa65SMarek Vasut #if CONFIG_POST & CONFIG_SYS_POST_UART 5067742aa65SMarek Vasut static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; 5077742aa65SMarek Vasut 5089cd2b9e4SMarek Vasut /** 5099cd2b9e4SMarek Vasut * uart_post_test() - Test the currently selected serial port using POST 5109cd2b9e4SMarek Vasut * @flags: POST framework flags 5119cd2b9e4SMarek Vasut * 5129cd2b9e4SMarek Vasut * Do a loopback test of the currently selected serial port. This 5139cd2b9e4SMarek Vasut * function is only useful in the context of the POST testing framwork. 5149cd2b9e4SMarek Vasut * The serial port is firstly configured into loopback mode and then 5159cd2b9e4SMarek Vasut * characters are sent through it. 5169cd2b9e4SMarek Vasut * 5179cd2b9e4SMarek Vasut * Returns 0 on success, value otherwise. 5189cd2b9e4SMarek Vasut */ 5197742aa65SMarek Vasut /* Mark weak until post/cpu/.../uart.c migrate over */ 5207742aa65SMarek Vasut __weak 5217742aa65SMarek Vasut int uart_post_test(int flags) 5227742aa65SMarek Vasut { 5237742aa65SMarek Vasut unsigned char c; 5247742aa65SMarek Vasut int ret, saved_baud, b; 5257742aa65SMarek Vasut struct serial_device *saved_dev, *s; 5267742aa65SMarek Vasut bd_t *bd = gd->bd; 5277742aa65SMarek Vasut 5287742aa65SMarek Vasut /* Save current serial state */ 5297742aa65SMarek Vasut ret = 0; 5307742aa65SMarek Vasut saved_dev = serial_current; 5317742aa65SMarek Vasut saved_baud = bd->bi_baudrate; 5327742aa65SMarek Vasut 5337742aa65SMarek Vasut for (s = serial_devices; s; s = s->next) { 5347742aa65SMarek Vasut /* If this driver doesn't support loop back, skip it */ 5357742aa65SMarek Vasut if (!s->loop) 5367742aa65SMarek Vasut continue; 5377742aa65SMarek Vasut 5387742aa65SMarek Vasut /* Test the next device */ 5397742aa65SMarek Vasut serial_current = s; 5407742aa65SMarek Vasut 5417742aa65SMarek Vasut ret = serial_init(); 5427742aa65SMarek Vasut if (ret) 5437742aa65SMarek Vasut goto done; 5447742aa65SMarek Vasut 5457742aa65SMarek Vasut /* Consume anything that happens to be queued */ 5467742aa65SMarek Vasut while (serial_tstc()) 5477742aa65SMarek Vasut serial_getc(); 5487742aa65SMarek Vasut 5497742aa65SMarek Vasut /* Enable loop back */ 5507742aa65SMarek Vasut s->loop(1); 5517742aa65SMarek Vasut 5527742aa65SMarek Vasut /* Test every available baud rate */ 5537742aa65SMarek Vasut for (b = 0; b < ARRAY_SIZE(bauds); ++b) { 5547742aa65SMarek Vasut bd->bi_baudrate = bauds[b]; 5557742aa65SMarek Vasut serial_setbrg(); 5567742aa65SMarek Vasut 5577742aa65SMarek Vasut /* 5587742aa65SMarek Vasut * Stick to printable chars to avoid issues: 5597742aa65SMarek Vasut * - terminal corruption 5607742aa65SMarek Vasut * - serial program reacting to sequences and sending 5617742aa65SMarek Vasut * back random extra data 5627742aa65SMarek Vasut * - most serial drivers add in extra chars (like \r\n) 5637742aa65SMarek Vasut */ 5647742aa65SMarek Vasut for (c = 0x20; c < 0x7f; ++c) { 5657742aa65SMarek Vasut /* Send it out */ 5667742aa65SMarek Vasut serial_putc(c); 5677742aa65SMarek Vasut 5687742aa65SMarek Vasut /* Make sure it's the same one */ 5697742aa65SMarek Vasut ret = (c != serial_getc()); 5707742aa65SMarek Vasut if (ret) { 5717742aa65SMarek Vasut s->loop(0); 5727742aa65SMarek Vasut goto done; 5737742aa65SMarek Vasut } 5747742aa65SMarek Vasut 5757742aa65SMarek Vasut /* Clean up the output in case it was sent */ 5767742aa65SMarek Vasut serial_putc('\b'); 5777742aa65SMarek Vasut ret = ('\b' != serial_getc()); 5787742aa65SMarek Vasut if (ret) { 5797742aa65SMarek Vasut s->loop(0); 5807742aa65SMarek Vasut goto done; 5817742aa65SMarek Vasut } 5827742aa65SMarek Vasut } 5837742aa65SMarek Vasut } 5847742aa65SMarek Vasut 5857742aa65SMarek Vasut /* Disable loop back */ 5867742aa65SMarek Vasut s->loop(0); 5877742aa65SMarek Vasut 5887742aa65SMarek Vasut /* XXX: There is no serial_stop() !? */ 5897742aa65SMarek Vasut if (s->stop) 5907742aa65SMarek Vasut s->stop(); 5917742aa65SMarek Vasut } 5927742aa65SMarek Vasut 5937742aa65SMarek Vasut done: 5947742aa65SMarek Vasut /* Restore previous serial state */ 5957742aa65SMarek Vasut serial_current = saved_dev; 5967742aa65SMarek Vasut bd->bi_baudrate = saved_baud; 5977742aa65SMarek Vasut serial_reinit_all(); 5987742aa65SMarek Vasut serial_setbrg(); 5997742aa65SMarek Vasut 6007742aa65SMarek Vasut return ret; 6017742aa65SMarek Vasut } 6027742aa65SMarek Vasut #endif 603