17742aa65SMarek Vasut /* 27742aa65SMarek Vasut * (C) Copyright 2004 37742aa65SMarek Vasut * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 47742aa65SMarek Vasut * 51a459660SWolfgang Denk * SPDX-License-Identifier: GPL-2.0+ 67742aa65SMarek Vasut */ 77742aa65SMarek Vasut 87742aa65SMarek Vasut #include <common.h> 932057717SJoe Hershberger #include <environment.h> 107742aa65SMarek Vasut #include <serial.h> 117742aa65SMarek Vasut #include <stdio_dev.h> 127742aa65SMarek Vasut #include <post.h> 137742aa65SMarek Vasut #include <linux/compiler.h> 146d93e258SMarek Vasut #include <errno.h> 157742aa65SMarek Vasut 167742aa65SMarek Vasut DECLARE_GLOBAL_DATA_PTR; 177742aa65SMarek Vasut 187742aa65SMarek Vasut static struct serial_device *serial_devices; 197742aa65SMarek Vasut static struct serial_device *serial_current; 2032057717SJoe Hershberger /* 2132057717SJoe Hershberger * Table with supported baudrates (defined in config_xyz.h) 2232057717SJoe Hershberger */ 2332057717SJoe Hershberger static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE; 247742aa65SMarek Vasut 259cd2b9e4SMarek Vasut /** 269cd2b9e4SMarek Vasut * serial_null() - Void registration routine of a serial driver 279cd2b9e4SMarek Vasut * 289cd2b9e4SMarek Vasut * This routine implements a void registration routine of a serial 299cd2b9e4SMarek Vasut * driver. The registration routine of a particular driver is aliased 309cd2b9e4SMarek Vasut * to this empty function in case the driver is not compiled into 319cd2b9e4SMarek Vasut * U-Boot. 329cd2b9e4SMarek Vasut */ 337742aa65SMarek Vasut static void serial_null(void) 347742aa65SMarek Vasut { 357742aa65SMarek Vasut } 367742aa65SMarek Vasut 379cd2b9e4SMarek Vasut /** 3832057717SJoe Hershberger * on_baudrate() - Update the actual baudrate when the env var changes 3932057717SJoe Hershberger * 4032057717SJoe Hershberger * This will check for a valid baudrate and only apply it if valid. 4132057717SJoe Hershberger */ 4232057717SJoe Hershberger static int on_baudrate(const char *name, const char *value, enum env_op op, 4332057717SJoe Hershberger int flags) 4432057717SJoe Hershberger { 4532057717SJoe Hershberger int i; 4632057717SJoe Hershberger int baudrate; 4732057717SJoe Hershberger 4832057717SJoe Hershberger switch (op) { 4932057717SJoe Hershberger case env_op_create: 5032057717SJoe Hershberger case env_op_overwrite: 5132057717SJoe Hershberger /* 5232057717SJoe Hershberger * Switch to new baudrate if new baudrate is supported 5332057717SJoe Hershberger */ 5432057717SJoe Hershberger baudrate = simple_strtoul(value, NULL, 10); 5532057717SJoe Hershberger 5632057717SJoe Hershberger /* Not actually changing */ 5732057717SJoe Hershberger if (gd->baudrate == baudrate) 5832057717SJoe Hershberger return 0; 5932057717SJoe Hershberger 609935175fSAxel Lin for (i = 0; i < ARRAY_SIZE(baudrate_table); ++i) { 6132057717SJoe Hershberger if (baudrate == baudrate_table[i]) 6232057717SJoe Hershberger break; 6332057717SJoe Hershberger } 649935175fSAxel Lin if (i == ARRAY_SIZE(baudrate_table)) { 6532057717SJoe Hershberger if ((flags & H_FORCE) == 0) 6632057717SJoe Hershberger printf("## Baudrate %d bps not supported\n", 6732057717SJoe Hershberger baudrate); 6832057717SJoe Hershberger return 1; 6932057717SJoe Hershberger } 7032057717SJoe Hershberger if ((flags & H_INTERACTIVE) != 0) { 7132057717SJoe Hershberger printf("## Switch baudrate to %d" 7232057717SJoe Hershberger " bps and press ENTER ...\n", baudrate); 7332057717SJoe Hershberger udelay(50000); 7432057717SJoe Hershberger } 7532057717SJoe Hershberger 7632057717SJoe Hershberger gd->baudrate = baudrate; 7732057717SJoe Hershberger 7832057717SJoe Hershberger serial_setbrg(); 7932057717SJoe Hershberger 8032057717SJoe Hershberger udelay(50000); 8132057717SJoe Hershberger 8232057717SJoe Hershberger if ((flags & H_INTERACTIVE) != 0) 8332057717SJoe Hershberger while (1) { 8432057717SJoe Hershberger if (getc() == '\r') 8532057717SJoe Hershberger break; 8632057717SJoe Hershberger } 8732057717SJoe Hershberger 8832057717SJoe Hershberger return 0; 8932057717SJoe Hershberger case env_op_delete: 9032057717SJoe Hershberger printf("## Baudrate may not be deleted\n"); 9132057717SJoe Hershberger return 1; 9232057717SJoe Hershberger default: 9332057717SJoe Hershberger return 0; 9432057717SJoe Hershberger } 9532057717SJoe Hershberger } 9632057717SJoe Hershberger U_BOOT_ENV_CALLBACK(baudrate, on_baudrate); 9732057717SJoe Hershberger 9832057717SJoe Hershberger /** 999cd2b9e4SMarek Vasut * serial_initfunc() - Forward declare of driver registration routine 1009cd2b9e4SMarek Vasut * @name: Name of the real driver registration routine. 1019cd2b9e4SMarek Vasut * 1029cd2b9e4SMarek Vasut * This macro expands onto forward declaration of a driver registration 1039cd2b9e4SMarek Vasut * routine, which is then used below in serial_initialize() function. 1049cd2b9e4SMarek Vasut * The declaration is made weak and aliases to serial_null() so in case 1059cd2b9e4SMarek Vasut * the driver is not compiled in, the function is still declared and can 1069cd2b9e4SMarek Vasut * be used, but aliases to serial_null() and thus is optimized away. 1079cd2b9e4SMarek Vasut */ 1087742aa65SMarek Vasut #define serial_initfunc(name) \ 1097742aa65SMarek Vasut void name(void) \ 1107742aa65SMarek Vasut __attribute__((weak, alias("serial_null"))); 1117742aa65SMarek Vasut 11294a255dfSJeroen Hofstee serial_initfunc(amirix_serial_initialize); 11394a255dfSJeroen Hofstee serial_initfunc(arc_serial_initialize); 11494a255dfSJeroen Hofstee serial_initfunc(arm_dcc_initialize); 1157742aa65SMarek Vasut serial_initfunc(asc_serial_initialize); 11694a255dfSJeroen Hofstee serial_initfunc(atmel_serial_initialize); 11794a255dfSJeroen Hofstee serial_initfunc(au1x00_serial_initialize); 11894a255dfSJeroen Hofstee serial_initfunc(bfin_jtag_initialize); 11994a255dfSJeroen Hofstee serial_initfunc(bfin_serial_initialize); 12094a255dfSJeroen Hofstee serial_initfunc(bmw_serial_initialize); 12194a255dfSJeroen Hofstee serial_initfunc(clps7111_serial_initialize); 12294a255dfSJeroen Hofstee serial_initfunc(cogent_serial_initialize); 12394a255dfSJeroen Hofstee serial_initfunc(cpci750_serial_initialize); 12494a255dfSJeroen Hofstee serial_initfunc(evb64260_serial_initialize); 12594a255dfSJeroen Hofstee serial_initfunc(imx_serial_initialize); 12694a255dfSJeroen Hofstee serial_initfunc(iop480_serial_initialize); 1277742aa65SMarek Vasut serial_initfunc(jz_serial_initialize); 12894a255dfSJeroen Hofstee serial_initfunc(leon2_serial_initialize); 12994a255dfSJeroen Hofstee serial_initfunc(leon3_serial_initialize); 13094a255dfSJeroen Hofstee serial_initfunc(lh7a40x_serial_initialize); 13194a255dfSJeroen Hofstee serial_initfunc(lpc32xx_serial_initialize); 13294a255dfSJeroen Hofstee serial_initfunc(marvell_serial_initialize); 13394a255dfSJeroen Hofstee serial_initfunc(max3100_serial_initialize); 13494a255dfSJeroen Hofstee serial_initfunc(mcf_serial_initialize); 13594a255dfSJeroen Hofstee serial_initfunc(ml2_serial_initialize); 13694a255dfSJeroen Hofstee serial_initfunc(mpc512x_serial_initialize); 1377742aa65SMarek Vasut serial_initfunc(mpc5xx_serial_initialize); 1387742aa65SMarek Vasut serial_initfunc(mpc8260_scc_serial_initialize); 1397742aa65SMarek Vasut serial_initfunc(mpc8260_smc_serial_initialize); 1407742aa65SMarek Vasut serial_initfunc(mpc85xx_serial_initialize); 14194a255dfSJeroen Hofstee serial_initfunc(mpc8xx_serial_initialize); 1427742aa65SMarek Vasut serial_initfunc(mxc_serial_initialize); 143661edaafSAndreas Wass serial_initfunc(mxs_auart_initialize); 14494a255dfSJeroen Hofstee serial_initfunc(ns16550_serial_initialize); 14594a255dfSJeroen Hofstee serial_initfunc(oc_serial_initialize); 14694a255dfSJeroen Hofstee serial_initfunc(p3mx_serial_initialize); 14794a255dfSJeroen Hofstee serial_initfunc(pl01x_serial_initialize); 14894a255dfSJeroen Hofstee serial_initfunc(pxa_serial_initialize); 14994a255dfSJeroen Hofstee serial_initfunc(s3c24xx_serial_initialize); 15094a255dfSJeroen Hofstee serial_initfunc(s5p_serial_initialize); 15194a255dfSJeroen Hofstee serial_initfunc(sa1100_serial_initialize); 15294a255dfSJeroen Hofstee serial_initfunc(sandbox_serial_initialize); 15394a255dfSJeroen Hofstee serial_initfunc(sconsole_serial_initialize); 15494a255dfSJeroen Hofstee serial_initfunc(sh_serial_initialize); 155ab3f0c7dSrev13@wp.pl serial_initfunc(stm32_serial_initialize); 15694a255dfSJeroen Hofstee serial_initfunc(uartlite_serial_initialize); 15794a255dfSJeroen Hofstee serial_initfunc(zynq_serial_initialize); 1587742aa65SMarek Vasut 1599cd2b9e4SMarek Vasut /** 1609cd2b9e4SMarek Vasut * serial_register() - Register serial driver with serial driver core 1619cd2b9e4SMarek Vasut * @dev: Pointer to the serial driver structure 1629cd2b9e4SMarek Vasut * 1639cd2b9e4SMarek Vasut * This function registers the serial driver supplied via @dev with 1649cd2b9e4SMarek Vasut * serial driver core, thus making U-Boot aware of it and making it 1659cd2b9e4SMarek Vasut * available for U-Boot to use. On platforms that still require manual 1669cd2b9e4SMarek Vasut * relocation of constant variables, relocation of the supplied structure 1679cd2b9e4SMarek Vasut * is performed. 1689cd2b9e4SMarek Vasut */ 1697742aa65SMarek Vasut void serial_register(struct serial_device *dev) 1707742aa65SMarek Vasut { 1717742aa65SMarek Vasut #ifdef CONFIG_NEEDS_MANUAL_RELOC 172f2760c4aSMarek Vasut if (dev->start) 1737742aa65SMarek Vasut dev->start += gd->reloc_off; 174f2760c4aSMarek Vasut if (dev->stop) 175f2760c4aSMarek Vasut dev->stop += gd->reloc_off; 176f2760c4aSMarek Vasut if (dev->setbrg) 1777742aa65SMarek Vasut dev->setbrg += gd->reloc_off; 178f2760c4aSMarek Vasut if (dev->getc) 1797742aa65SMarek Vasut dev->getc += gd->reloc_off; 180f2760c4aSMarek Vasut if (dev->tstc) 1817742aa65SMarek Vasut dev->tstc += gd->reloc_off; 182f2760c4aSMarek Vasut if (dev->putc) 1837742aa65SMarek Vasut dev->putc += gd->reloc_off; 184f2760c4aSMarek Vasut if (dev->puts) 1857742aa65SMarek Vasut dev->puts += gd->reloc_off; 1867742aa65SMarek Vasut #endif 1877742aa65SMarek Vasut 1887742aa65SMarek Vasut dev->next = serial_devices; 1897742aa65SMarek Vasut serial_devices = dev; 1907742aa65SMarek Vasut } 1917742aa65SMarek Vasut 1929cd2b9e4SMarek Vasut /** 1939cd2b9e4SMarek Vasut * serial_initialize() - Register all compiled-in serial port drivers 1949cd2b9e4SMarek Vasut * 1959cd2b9e4SMarek Vasut * This function registers all serial port drivers that are compiled 1969cd2b9e4SMarek Vasut * into the U-Boot binary with the serial core, thus making them 1979cd2b9e4SMarek Vasut * available to U-Boot to use. Lastly, this function assigns a default 1989cd2b9e4SMarek Vasut * serial port to the serial core. That serial port is then used as a 1999cd2b9e4SMarek Vasut * default output. 2009cd2b9e4SMarek Vasut */ 2017742aa65SMarek Vasut void serial_initialize(void) 2027742aa65SMarek Vasut { 20394a255dfSJeroen Hofstee amirix_serial_initialize(); 20494a255dfSJeroen Hofstee arc_serial_initialize(); 20594a255dfSJeroen Hofstee arm_dcc_initialize(); 2067742aa65SMarek Vasut asc_serial_initialize(); 20794a255dfSJeroen Hofstee atmel_serial_initialize(); 20894a255dfSJeroen Hofstee au1x00_serial_initialize(); 20994a255dfSJeroen Hofstee bfin_jtag_initialize(); 21094a255dfSJeroen Hofstee bfin_serial_initialize(); 21194a255dfSJeroen Hofstee bmw_serial_initialize(); 21294a255dfSJeroen Hofstee clps7111_serial_initialize(); 21394a255dfSJeroen Hofstee cogent_serial_initialize(); 21494a255dfSJeroen Hofstee cpci750_serial_initialize(); 21594a255dfSJeroen Hofstee evb64260_serial_initialize(); 21694a255dfSJeroen Hofstee imx_serial_initialize(); 21794a255dfSJeroen Hofstee iop480_serial_initialize(); 2187742aa65SMarek Vasut jz_serial_initialize(); 21994a255dfSJeroen Hofstee leon2_serial_initialize(); 22094a255dfSJeroen Hofstee leon3_serial_initialize(); 22194a255dfSJeroen Hofstee lh7a40x_serial_initialize(); 22294a255dfSJeroen Hofstee lpc32xx_serial_initialize(); 22394a255dfSJeroen Hofstee marvell_serial_initialize(); 22494a255dfSJeroen Hofstee max3100_serial_initialize(); 22594a255dfSJeroen Hofstee mcf_serial_initialize(); 22694a255dfSJeroen Hofstee ml2_serial_initialize(); 22794a255dfSJeroen Hofstee mpc512x_serial_initialize(); 2287742aa65SMarek Vasut mpc5xx_serial_initialize(); 2297742aa65SMarek Vasut mpc8260_scc_serial_initialize(); 2307742aa65SMarek Vasut mpc8260_smc_serial_initialize(); 2317742aa65SMarek Vasut mpc85xx_serial_initialize(); 23294a255dfSJeroen Hofstee mpc8xx_serial_initialize(); 2337742aa65SMarek Vasut mxc_serial_initialize(); 234661edaafSAndreas Wass mxs_auart_initialize(); 23594a255dfSJeroen Hofstee ns16550_serial_initialize(); 23694a255dfSJeroen Hofstee oc_serial_initialize(); 23794a255dfSJeroen Hofstee p3mx_serial_initialize(); 23894a255dfSJeroen Hofstee pl01x_serial_initialize(); 23994a255dfSJeroen Hofstee pxa_serial_initialize(); 24094a255dfSJeroen Hofstee s3c24xx_serial_initialize(); 24194a255dfSJeroen Hofstee s5p_serial_initialize(); 24294a255dfSJeroen Hofstee sa1100_serial_initialize(); 24394a255dfSJeroen Hofstee sandbox_serial_initialize(); 24494a255dfSJeroen Hofstee sconsole_serial_initialize(); 24594a255dfSJeroen Hofstee sh_serial_initialize(); 246ab3f0c7dSrev13@wp.pl stm32_serial_initialize(); 24794a255dfSJeroen Hofstee uartlite_serial_initialize(); 24894a255dfSJeroen Hofstee zynq_serial_initialize(); 2497742aa65SMarek Vasut 2507742aa65SMarek Vasut serial_assign(default_serial_console()->name); 2517742aa65SMarek Vasut } 2527742aa65SMarek Vasut 253654f8d0fSJeroen Hofstee static int serial_stub_start(struct stdio_dev *sdev) 254709ea543SSimon Glass { 255709ea543SSimon Glass struct serial_device *dev = sdev->priv; 256709ea543SSimon Glass 257709ea543SSimon Glass return dev->start(); 258709ea543SSimon Glass } 259709ea543SSimon Glass 260654f8d0fSJeroen Hofstee static int serial_stub_stop(struct stdio_dev *sdev) 261709ea543SSimon Glass { 262709ea543SSimon Glass struct serial_device *dev = sdev->priv; 263709ea543SSimon Glass 264709ea543SSimon Glass return dev->stop(); 265709ea543SSimon Glass } 266709ea543SSimon Glass 267654f8d0fSJeroen Hofstee static void serial_stub_putc(struct stdio_dev *sdev, const char ch) 268709ea543SSimon Glass { 269709ea543SSimon Glass struct serial_device *dev = sdev->priv; 270709ea543SSimon Glass 271709ea543SSimon Glass dev->putc(ch); 272709ea543SSimon Glass } 273709ea543SSimon Glass 274654f8d0fSJeroen Hofstee static void serial_stub_puts(struct stdio_dev *sdev, const char *str) 275709ea543SSimon Glass { 276709ea543SSimon Glass struct serial_device *dev = sdev->priv; 277709ea543SSimon Glass 278709ea543SSimon Glass dev->puts(str); 279709ea543SSimon Glass } 280709ea543SSimon Glass 281709ea543SSimon Glass int serial_stub_getc(struct stdio_dev *sdev) 282709ea543SSimon Glass { 283709ea543SSimon Glass struct serial_device *dev = sdev->priv; 284709ea543SSimon Glass 285709ea543SSimon Glass return dev->getc(); 286709ea543SSimon Glass } 287709ea543SSimon Glass 288709ea543SSimon Glass int serial_stub_tstc(struct stdio_dev *sdev) 289709ea543SSimon Glass { 290709ea543SSimon Glass struct serial_device *dev = sdev->priv; 291709ea543SSimon Glass 292709ea543SSimon Glass return dev->tstc(); 293709ea543SSimon Glass } 294709ea543SSimon Glass 2959cd2b9e4SMarek Vasut /** 2969cd2b9e4SMarek Vasut * serial_stdio_init() - Register serial ports with STDIO core 2979cd2b9e4SMarek Vasut * 2989cd2b9e4SMarek Vasut * This function generates a proxy driver for each serial port driver. 2999cd2b9e4SMarek Vasut * These proxy drivers then register with the STDIO core, making the 3009cd2b9e4SMarek Vasut * serial drivers available as STDIO devices. 3019cd2b9e4SMarek Vasut */ 3027742aa65SMarek Vasut void serial_stdio_init(void) 3037742aa65SMarek Vasut { 3047742aa65SMarek Vasut struct stdio_dev dev; 3057742aa65SMarek Vasut struct serial_device *s = serial_devices; 3067742aa65SMarek Vasut 3077742aa65SMarek Vasut while (s) { 3087742aa65SMarek Vasut memset(&dev, 0, sizeof(dev)); 3097742aa65SMarek Vasut 3107742aa65SMarek Vasut strcpy(dev.name, s->name); 3117742aa65SMarek Vasut dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT; 3127742aa65SMarek Vasut 313709ea543SSimon Glass dev.start = serial_stub_start; 314709ea543SSimon Glass dev.stop = serial_stub_stop; 315709ea543SSimon Glass dev.putc = serial_stub_putc; 316709ea543SSimon Glass dev.puts = serial_stub_puts; 317709ea543SSimon Glass dev.getc = serial_stub_getc; 318709ea543SSimon Glass dev.tstc = serial_stub_tstc; 319addf9513SSimon Glass dev.priv = s; 3207742aa65SMarek Vasut 3217742aa65SMarek Vasut stdio_register(&dev); 3227742aa65SMarek Vasut 3237742aa65SMarek Vasut s = s->next; 3247742aa65SMarek Vasut } 3257742aa65SMarek Vasut } 3267742aa65SMarek Vasut 3279cd2b9e4SMarek Vasut /** 3289cd2b9e4SMarek Vasut * serial_assign() - Select the serial output device by name 3299cd2b9e4SMarek Vasut * @name: Name of the serial driver to be used as default output 3309cd2b9e4SMarek Vasut * 3319cd2b9e4SMarek Vasut * This function configures the serial output multiplexing by 3329cd2b9e4SMarek Vasut * selecting which serial device will be used as default. In case 3339cd2b9e4SMarek Vasut * the STDIO "serial" device is selected as stdin/stdout/stderr, 3349cd2b9e4SMarek Vasut * the serial device previously configured by this function will be 3359cd2b9e4SMarek Vasut * used for the particular operation. 3369cd2b9e4SMarek Vasut * 3379cd2b9e4SMarek Vasut * Returns 0 on success, negative on error. 3389cd2b9e4SMarek Vasut */ 3397742aa65SMarek Vasut int serial_assign(const char *name) 3407742aa65SMarek Vasut { 3417742aa65SMarek Vasut struct serial_device *s; 3427742aa65SMarek Vasut 3437742aa65SMarek Vasut for (s = serial_devices; s; s = s->next) { 3446d93e258SMarek Vasut if (strcmp(s->name, name)) 3456d93e258SMarek Vasut continue; 3467742aa65SMarek Vasut serial_current = s; 3477742aa65SMarek Vasut return 0; 3487742aa65SMarek Vasut } 3497742aa65SMarek Vasut 3506d93e258SMarek Vasut return -EINVAL; 3517742aa65SMarek Vasut } 3527742aa65SMarek Vasut 3539cd2b9e4SMarek Vasut /** 3549cd2b9e4SMarek Vasut * serial_reinit_all() - Reinitialize all compiled-in serial ports 3559cd2b9e4SMarek Vasut * 3569cd2b9e4SMarek Vasut * This function reinitializes all serial ports that are compiled 3579cd2b9e4SMarek Vasut * into U-Boot by calling their serial_start() functions. 3589cd2b9e4SMarek Vasut */ 3597742aa65SMarek Vasut void serial_reinit_all(void) 3607742aa65SMarek Vasut { 3617742aa65SMarek Vasut struct serial_device *s; 3627742aa65SMarek Vasut 3637742aa65SMarek Vasut for (s = serial_devices; s; s = s->next) 3647742aa65SMarek Vasut s->start(); 3657742aa65SMarek Vasut } 3667742aa65SMarek Vasut 3679cd2b9e4SMarek Vasut /** 3689cd2b9e4SMarek Vasut * get_current() - Return pointer to currently selected serial port 3699cd2b9e4SMarek Vasut * 3709cd2b9e4SMarek Vasut * This function returns a pointer to currently selected serial port. 3719cd2b9e4SMarek Vasut * The currently selected serial port is altered by serial_assign() 3729cd2b9e4SMarek Vasut * function. 3739cd2b9e4SMarek Vasut * 3749cd2b9e4SMarek Vasut * In case this function is called before relocation or before any serial 3759cd2b9e4SMarek Vasut * port is configured, this function calls default_serial_console() to 3769cd2b9e4SMarek Vasut * determine the serial port. Otherwise, the configured serial port is 3779cd2b9e4SMarek Vasut * returned. 3789cd2b9e4SMarek Vasut * 3799cd2b9e4SMarek Vasut * Returns pointer to the currently selected serial port on success, 3809cd2b9e4SMarek Vasut * NULL on error. 3819cd2b9e4SMarek Vasut */ 3827742aa65SMarek Vasut static struct serial_device *get_current(void) 3837742aa65SMarek Vasut { 3847742aa65SMarek Vasut struct serial_device *dev; 3857742aa65SMarek Vasut 386dee19416SMarek Vasut if (!(gd->flags & GD_FLG_RELOC)) 3877742aa65SMarek Vasut dev = default_serial_console(); 388dee19416SMarek Vasut else if (!serial_current) 389dee19416SMarek Vasut dev = default_serial_console(); 390dee19416SMarek Vasut else 391dee19416SMarek Vasut dev = serial_current; 3927742aa65SMarek Vasut 3937742aa65SMarek Vasut /* We must have a console device */ 3947742aa65SMarek Vasut if (!dev) { 3957742aa65SMarek Vasut #ifdef CONFIG_SPL_BUILD 3967742aa65SMarek Vasut puts("Cannot find console\n"); 3977742aa65SMarek Vasut hang(); 3987742aa65SMarek Vasut #else 3997742aa65SMarek Vasut panic("Cannot find console\n"); 4007742aa65SMarek Vasut #endif 4017742aa65SMarek Vasut } 402dee19416SMarek Vasut 4037742aa65SMarek Vasut return dev; 4047742aa65SMarek Vasut } 4057742aa65SMarek Vasut 4069cd2b9e4SMarek Vasut /** 4079cd2b9e4SMarek Vasut * serial_init() - Initialize currently selected serial port 4089cd2b9e4SMarek Vasut * 4099cd2b9e4SMarek Vasut * This function initializes the currently selected serial port. This 4109cd2b9e4SMarek Vasut * usually involves setting up the registers of that particular port, 4119cd2b9e4SMarek Vasut * enabling clock and such. 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 int serial_init(void) 4177742aa65SMarek Vasut { 418093f79abSSimon Glass gd->flags |= GD_FLG_SERIAL_READY; 4197742aa65SMarek Vasut return get_current()->start(); 4207742aa65SMarek Vasut } 4217742aa65SMarek Vasut 4229cd2b9e4SMarek Vasut /** 4239cd2b9e4SMarek Vasut * serial_setbrg() - Configure baud-rate of currently selected serial port 4249cd2b9e4SMarek Vasut * 4259cd2b9e4SMarek Vasut * This function configures the baud-rate of the currently selected 4269cd2b9e4SMarek Vasut * serial port. The baud-rate is retrieved from global data within 4279cd2b9e4SMarek Vasut * the serial port driver. This function uses the get_current() call 4289cd2b9e4SMarek Vasut * to determine which port is selected. 4299cd2b9e4SMarek Vasut * 4309cd2b9e4SMarek Vasut * Returns 0 on success, negative on error. 4319cd2b9e4SMarek Vasut */ 4327742aa65SMarek Vasut void serial_setbrg(void) 4337742aa65SMarek Vasut { 4347742aa65SMarek Vasut get_current()->setbrg(); 4357742aa65SMarek Vasut } 4367742aa65SMarek Vasut 4379cd2b9e4SMarek Vasut /** 4389cd2b9e4SMarek Vasut * serial_getc() - Read character from currently selected serial port 4399cd2b9e4SMarek Vasut * 4409cd2b9e4SMarek Vasut * This function retrieves a character from currently selected serial 4419cd2b9e4SMarek Vasut * port. In case there is no character waiting on the serial port, 4429cd2b9e4SMarek Vasut * this function will block and wait for the character to appear. This 4439cd2b9e4SMarek Vasut * function uses the get_current() call to determine which port is 4449cd2b9e4SMarek Vasut * selected. 4459cd2b9e4SMarek Vasut * 4469cd2b9e4SMarek Vasut * Returns the character on success, negative on error. 4479cd2b9e4SMarek Vasut */ 4487742aa65SMarek Vasut int serial_getc(void) 4497742aa65SMarek Vasut { 4507742aa65SMarek Vasut return get_current()->getc(); 4517742aa65SMarek Vasut } 4527742aa65SMarek Vasut 4539cd2b9e4SMarek Vasut /** 4549cd2b9e4SMarek Vasut * serial_tstc() - Test if data is available on currently selected serial port 4559cd2b9e4SMarek Vasut * 4569cd2b9e4SMarek Vasut * This function tests if one or more characters are available on 4579cd2b9e4SMarek Vasut * currently selected serial port. This function never blocks. This 4589cd2b9e4SMarek Vasut * function uses the get_current() call to determine which port is 4599cd2b9e4SMarek Vasut * selected. 4609cd2b9e4SMarek Vasut * 4619cd2b9e4SMarek Vasut * Returns positive if character is available, zero otherwise. 4629cd2b9e4SMarek Vasut */ 4637742aa65SMarek Vasut int serial_tstc(void) 4647742aa65SMarek Vasut { 4657742aa65SMarek Vasut return get_current()->tstc(); 4667742aa65SMarek Vasut } 4677742aa65SMarek Vasut 4689cd2b9e4SMarek Vasut /** 4699cd2b9e4SMarek Vasut * serial_putc() - Output character via currently selected serial port 4709cd2b9e4SMarek Vasut * @c: Single character to be output from the serial port. 4719cd2b9e4SMarek Vasut * 4729cd2b9e4SMarek Vasut * This function outputs a character via currently selected serial 4739cd2b9e4SMarek Vasut * port. This character is passed to the serial port driver responsible 4749cd2b9e4SMarek Vasut * for controlling the hardware. The hardware may still be in process 4759cd2b9e4SMarek Vasut * of transmitting another character, therefore this function may block 4769cd2b9e4SMarek Vasut * for a short amount of time. This function uses the get_current() 4779cd2b9e4SMarek Vasut * call to determine which port is selected. 4789cd2b9e4SMarek Vasut */ 4797742aa65SMarek Vasut void serial_putc(const char c) 4807742aa65SMarek Vasut { 4817742aa65SMarek Vasut get_current()->putc(c); 4827742aa65SMarek Vasut } 4837742aa65SMarek Vasut 4849cd2b9e4SMarek Vasut /** 4859cd2b9e4SMarek Vasut * serial_puts() - Output string via currently selected serial port 4869cd2b9e4SMarek Vasut * @s: Zero-terminated string to be output from the serial port. 4879cd2b9e4SMarek Vasut * 4889cd2b9e4SMarek Vasut * This function outputs a zero-terminated string via currently 4899cd2b9e4SMarek Vasut * selected serial port. This function behaves as an accelerator 4909cd2b9e4SMarek Vasut * in case the hardware can queue multiple characters for transfer. 4919cd2b9e4SMarek Vasut * The whole string that is to be output is available to the function 4929cd2b9e4SMarek Vasut * implementing the hardware manipulation. Transmitting the whole 4939cd2b9e4SMarek Vasut * string may take some time, thus this function may block for some 4949cd2b9e4SMarek Vasut * amount of time. This function uses the get_current() call to 4959cd2b9e4SMarek Vasut * determine which port is selected. 4969cd2b9e4SMarek Vasut */ 4977742aa65SMarek Vasut void serial_puts(const char *s) 4987742aa65SMarek Vasut { 4997742aa65SMarek Vasut get_current()->puts(s); 5007742aa65SMarek Vasut } 5017742aa65SMarek Vasut 5029cd2b9e4SMarek Vasut /** 5039cd2b9e4SMarek Vasut * default_serial_puts() - Output string by calling serial_putc() in loop 5049cd2b9e4SMarek Vasut * @s: Zero-terminated string to be output from the serial port. 5059cd2b9e4SMarek Vasut * 5069cd2b9e4SMarek Vasut * This function outputs a zero-terminated string by calling serial_putc() 5079cd2b9e4SMarek Vasut * in a loop. Most drivers do not support queueing more than one byte for 5089cd2b9e4SMarek Vasut * transfer, thus this function precisely implements their serial_puts(). 5099cd2b9e4SMarek Vasut * 5109cd2b9e4SMarek Vasut * To optimize the number of get_current() calls, this function only 5119cd2b9e4SMarek Vasut * calls get_current() once and then directly accesses the putc() call 5129cd2b9e4SMarek Vasut * of the &struct serial_device . 5139cd2b9e4SMarek Vasut */ 514bfb7d7a3SMarek Vasut void default_serial_puts(const char *s) 515bfb7d7a3SMarek Vasut { 516bfb7d7a3SMarek Vasut struct serial_device *dev = get_current(); 517bfb7d7a3SMarek Vasut while (*s) 518bfb7d7a3SMarek Vasut dev->putc(*s++); 519bfb7d7a3SMarek Vasut } 520bfb7d7a3SMarek Vasut 5217742aa65SMarek Vasut #if CONFIG_POST & CONFIG_SYS_POST_UART 5227742aa65SMarek Vasut static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; 5237742aa65SMarek Vasut 5249cd2b9e4SMarek Vasut /** 5259cd2b9e4SMarek Vasut * uart_post_test() - Test the currently selected serial port using POST 5269cd2b9e4SMarek Vasut * @flags: POST framework flags 5279cd2b9e4SMarek Vasut * 5289cd2b9e4SMarek Vasut * Do a loopback test of the currently selected serial port. This 5299cd2b9e4SMarek Vasut * function is only useful in the context of the POST testing framwork. 530*1b25e586SVagrant Cascadian * The serial port is first configured into loopback mode and then 5319cd2b9e4SMarek Vasut * characters are sent through it. 5329cd2b9e4SMarek Vasut * 5339cd2b9e4SMarek Vasut * Returns 0 on success, value otherwise. 5349cd2b9e4SMarek Vasut */ 5357742aa65SMarek Vasut /* Mark weak until post/cpu/.../uart.c migrate over */ 5367742aa65SMarek Vasut __weak 5377742aa65SMarek Vasut int uart_post_test(int flags) 5387742aa65SMarek Vasut { 5397742aa65SMarek Vasut unsigned char c; 5407742aa65SMarek Vasut int ret, saved_baud, b; 5417742aa65SMarek Vasut struct serial_device *saved_dev, *s; 5427742aa65SMarek Vasut 5437742aa65SMarek Vasut /* Save current serial state */ 5447742aa65SMarek Vasut ret = 0; 5457742aa65SMarek Vasut saved_dev = serial_current; 5468e261575SMasahiro Yamada saved_baud = gd->baudrate; 5477742aa65SMarek Vasut 5487742aa65SMarek Vasut for (s = serial_devices; s; s = s->next) { 5497742aa65SMarek Vasut /* If this driver doesn't support loop back, skip it */ 5507742aa65SMarek Vasut if (!s->loop) 5517742aa65SMarek Vasut continue; 5527742aa65SMarek Vasut 5537742aa65SMarek Vasut /* Test the next device */ 5547742aa65SMarek Vasut serial_current = s; 5557742aa65SMarek Vasut 5567742aa65SMarek Vasut ret = serial_init(); 5577742aa65SMarek Vasut if (ret) 5587742aa65SMarek Vasut goto done; 5597742aa65SMarek Vasut 5607742aa65SMarek Vasut /* Consume anything that happens to be queued */ 5617742aa65SMarek Vasut while (serial_tstc()) 5627742aa65SMarek Vasut serial_getc(); 5637742aa65SMarek Vasut 5647742aa65SMarek Vasut /* Enable loop back */ 5657742aa65SMarek Vasut s->loop(1); 5667742aa65SMarek Vasut 5677742aa65SMarek Vasut /* Test every available baud rate */ 5687742aa65SMarek Vasut for (b = 0; b < ARRAY_SIZE(bauds); ++b) { 5698e261575SMasahiro Yamada gd->baudrate = bauds[b]; 5707742aa65SMarek Vasut serial_setbrg(); 5717742aa65SMarek Vasut 5727742aa65SMarek Vasut /* 5737742aa65SMarek Vasut * Stick to printable chars to avoid issues: 5747742aa65SMarek Vasut * - terminal corruption 5757742aa65SMarek Vasut * - serial program reacting to sequences and sending 5767742aa65SMarek Vasut * back random extra data 5777742aa65SMarek Vasut * - most serial drivers add in extra chars (like \r\n) 5787742aa65SMarek Vasut */ 5797742aa65SMarek Vasut for (c = 0x20; c < 0x7f; ++c) { 5807742aa65SMarek Vasut /* Send it out */ 5817742aa65SMarek Vasut serial_putc(c); 5827742aa65SMarek Vasut 5837742aa65SMarek Vasut /* Make sure it's the same one */ 5847742aa65SMarek Vasut ret = (c != serial_getc()); 5857742aa65SMarek Vasut if (ret) { 5867742aa65SMarek Vasut s->loop(0); 5877742aa65SMarek Vasut goto done; 5887742aa65SMarek Vasut } 5897742aa65SMarek Vasut 5907742aa65SMarek Vasut /* Clean up the output in case it was sent */ 5917742aa65SMarek Vasut serial_putc('\b'); 5927742aa65SMarek Vasut ret = ('\b' != serial_getc()); 5937742aa65SMarek Vasut if (ret) { 5947742aa65SMarek Vasut s->loop(0); 5957742aa65SMarek Vasut goto done; 5967742aa65SMarek Vasut } 5977742aa65SMarek Vasut } 5987742aa65SMarek Vasut } 5997742aa65SMarek Vasut 6007742aa65SMarek Vasut /* Disable loop back */ 6017742aa65SMarek Vasut s->loop(0); 6027742aa65SMarek Vasut 6037742aa65SMarek Vasut /* XXX: There is no serial_stop() !? */ 6047742aa65SMarek Vasut if (s->stop) 6057742aa65SMarek Vasut s->stop(); 6067742aa65SMarek Vasut } 6077742aa65SMarek Vasut 6087742aa65SMarek Vasut done: 6097742aa65SMarek Vasut /* Restore previous serial state */ 6107742aa65SMarek Vasut serial_current = saved_dev; 6118e261575SMasahiro Yamada gd->baudrate = saved_baud; 6127742aa65SMarek Vasut serial_reinit_all(); 6137742aa65SMarek Vasut serial_setbrg(); 6147742aa65SMarek Vasut 6157742aa65SMarek Vasut return ret; 6167742aa65SMarek Vasut } 6177742aa65SMarek Vasut #endif 618