diff options
Diffstat (limited to 'drivers/serial/serial.c')
| -rw-r--r-- | drivers/serial/serial.c | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c new file mode 100644 index 000000000..acb74af96 --- /dev/null +++ b/drivers/serial/serial.c @@ -0,0 +1,354 @@ +/* + * (C) Copyright 2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <serial.h> +#include <stdio_dev.h> +#include <post.h> +#include <linux/compiler.h> + +DECLARE_GLOBAL_DATA_PTR; + +static struct serial_device *serial_devices; +static struct serial_device *serial_current; + +static void serial_null(void) +{ +} + +#define serial_initfunc(name) \ + void name(void) \ + __attribute__((weak, alias("serial_null"))); + +serial_initfunc(mpc8xx_serial_initialize); +serial_initfunc(ns16550_serial_initialize); +serial_initfunc(pxa_serial_initialize); +serial_initfunc(s3c24xx_serial_initialize); +serial_initfunc(s5p_serial_initialize); +serial_initfunc(zynq_serial_initalize); +serial_initfunc(bfin_serial_initialize); +serial_initfunc(bfin_jtag_initialize); +serial_initfunc(mpc512x_serial_initialize); +serial_initfunc(uartlite_serial_initialize); +serial_initfunc(au1x00_serial_initialize); +serial_initfunc(asc_serial_initialize); +serial_initfunc(jz_serial_initialize); +serial_initfunc(mpc5xx_serial_initialize); +serial_initfunc(mpc8220_serial_initialize); +serial_initfunc(mpc8260_scc_serial_initialize); +serial_initfunc(mpc8260_smc_serial_initialize); +serial_initfunc(mpc85xx_serial_initialize); +serial_initfunc(iop480_serial_initialize); +serial_initfunc(leon2_serial_initialize); +serial_initfunc(leon3_serial_initialize); +serial_initfunc(marvell_serial_initialize); +serial_initfunc(amirix_serial_initialize); +serial_initfunc(bmw_serial_initialize); +serial_initfunc(cogent_serial_initialize); +serial_initfunc(cpci750_serial_initialize); +serial_initfunc(evb64260_serial_initialize); +serial_initfunc(ml2_serial_initialize); +serial_initfunc(sconsole_serial_initialize); +serial_initfunc(p3mx_serial_initialize); +serial_initfunc(altera_jtag_serial_initialize); +serial_initfunc(altera_serial_initialize); +serial_initfunc(atmel_serial_initialize); +serial_initfunc(lpc32xx_serial_initialize); +serial_initfunc(mcf_serial_initialize); +serial_initfunc(ns9750_serial_initialize); +serial_initfunc(oc_serial_initialize); +serial_initfunc(s3c4510b_serial_initialize); +serial_initfunc(s3c64xx_serial_initialize); +serial_initfunc(sandbox_serial_initialize); +serial_initfunc(clps7111_serial_initialize); +serial_initfunc(imx_serial_initialize); +serial_initfunc(ixp_serial_initialize); +serial_initfunc(ks8695_serial_initialize); +serial_initfunc(lh7a40x_serial_initialize); +serial_initfunc(lpc2292_serial_initialize); +serial_initfunc(max3100_serial_initialize); +serial_initfunc(mxc_serial_initialize); +serial_initfunc(netarm_serial_initialize); +serial_initfunc(pl01x_serial_initialize); +serial_initfunc(s3c44b0_serial_initialize); +serial_initfunc(sa1100_serial_initialize); +serial_initfunc(sh_serial_initialize); + +void serial_register(struct serial_device *dev) +{ +#ifdef CONFIG_NEEDS_MANUAL_RELOC + dev->start += gd->reloc_off; + dev->setbrg += gd->reloc_off; + dev->getc += gd->reloc_off; + dev->tstc += gd->reloc_off; + dev->putc += gd->reloc_off; + dev->puts += gd->reloc_off; +#endif + + dev->next = serial_devices; + serial_devices = dev; +} + +void serial_initialize(void) +{ + mpc8xx_serial_initialize(); + ns16550_serial_initialize(); + pxa_serial_initialize(); + s3c24xx_serial_initialize(); + s5p_serial_initialize(); + mpc512x_serial_initialize(); + bfin_serial_initialize(); + bfin_jtag_initialize(); + uartlite_serial_initialize(); + zynq_serial_initalize(); + au1x00_serial_initialize(); + asc_serial_initialize(); + jz_serial_initialize(); + mpc5xx_serial_initialize(); + mpc8220_serial_initialize(); + mpc8260_scc_serial_initialize(); + mpc8260_smc_serial_initialize(); + mpc85xx_serial_initialize(); + iop480_serial_initialize(); + leon2_serial_initialize(); + leon3_serial_initialize(); + marvell_serial_initialize(); + amirix_serial_initialize(); + bmw_serial_initialize(); + cogent_serial_initialize(); + cpci750_serial_initialize(); + evb64260_serial_initialize(); + ml2_serial_initialize(); + sconsole_serial_initialize(); + p3mx_serial_initialize(); + altera_jtag_serial_initialize(); + altera_serial_initialize(); + atmel_serial_initialize(); + lpc32xx_serial_initialize(); + mcf_serial_initialize(); + ns9750_serial_initialize(); + oc_serial_initialize(); + s3c4510b_serial_initialize(); + s3c64xx_serial_initialize(); + sandbox_serial_initialize(); + clps7111_serial_initialize(); + imx_serial_initialize(); + ixp_serial_initialize(); + ks8695_serial_initialize(); + lh7a40x_serial_initialize(); + lpc2292_serial_initialize(); + max3100_serial_initialize(); + mxc_serial_initialize(); + netarm_serial_initialize(); + pl01x_serial_initialize(); + s3c44b0_serial_initialize(); + sa1100_serial_initialize(); + sh_serial_initialize(); + + serial_assign(default_serial_console()->name); +} + +void serial_stdio_init(void) +{ + struct stdio_dev dev; + struct serial_device *s = serial_devices; + + while (s) { + memset(&dev, 0, sizeof(dev)); + + strcpy(dev.name, s->name); + dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT; + + dev.start = s->start; + dev.stop = s->stop; + dev.putc = s->putc; + dev.puts = s->puts; + dev.getc = s->getc; + dev.tstc = s->tstc; + + stdio_register(&dev); + + s = s->next; + } +} + +int serial_assign(const char *name) +{ + struct serial_device *s; + + for (s = serial_devices; s; s = s->next) { + if (strcmp(s->name, name) == 0) { + serial_current = s; + return 0; + } + } + + return 1; +} + +void serial_reinit_all(void) +{ + struct serial_device *s; + + for (s = serial_devices; s; s = s->next) + s->start(); +} + +static struct serial_device *get_current(void) +{ + struct serial_device *dev; + + if (!(gd->flags & GD_FLG_RELOC) || !serial_current) { + dev = default_serial_console(); + + /* We must have a console device */ + if (!dev) { +#ifdef CONFIG_SPL_BUILD + puts("Cannot find console\n"); + hang(); +#else + panic("Cannot find console\n"); +#endif + } + } else + dev = serial_current; + return dev; +} + +int serial_init(void) +{ + return get_current()->start(); +} + +void serial_setbrg(void) +{ + get_current()->setbrg(); +} + +int serial_getc(void) +{ + return get_current()->getc(); +} + +int serial_tstc(void) +{ + return get_current()->tstc(); +} + +void serial_putc(const char c) +{ + get_current()->putc(c); +} + +void serial_puts(const char *s) +{ + get_current()->puts(s); +} + +#if CONFIG_POST & CONFIG_SYS_POST_UART +static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; + +/* Mark weak until post/cpu/.../uart.c migrate over */ +__weak +int uart_post_test(int flags) +{ + unsigned char c; + int ret, saved_baud, b; + struct serial_device *saved_dev, *s; + bd_t *bd = gd->bd; + + /* Save current serial state */ + ret = 0; + saved_dev = serial_current; + saved_baud = bd->bi_baudrate; + + for (s = serial_devices; s; s = s->next) { + /* If this driver doesn't support loop back, skip it */ + if (!s->loop) + continue; + + /* Test the next device */ + serial_current = s; + + ret = serial_init(); + if (ret) + goto done; + + /* Consume anything that happens to be queued */ + while (serial_tstc()) + serial_getc(); + + /* Enable loop back */ + s->loop(1); + + /* Test every available baud rate */ + for (b = 0; b < ARRAY_SIZE(bauds); ++b) { + bd->bi_baudrate = bauds[b]; + serial_setbrg(); + + /* + * Stick to printable chars to avoid issues: + * - terminal corruption + * - serial program reacting to sequences and sending + * back random extra data + * - most serial drivers add in extra chars (like \r\n) + */ + for (c = 0x20; c < 0x7f; ++c) { + /* Send it out */ + serial_putc(c); + + /* Make sure it's the same one */ + ret = (c != serial_getc()); + if (ret) { + s->loop(0); + goto done; + } + + /* Clean up the output in case it was sent */ + serial_putc('\b'); + ret = ('\b' != serial_getc()); + if (ret) { + s->loop(0); + goto done; + } + } + } + + /* Disable loop back */ + s->loop(0); + + /* XXX: There is no serial_stop() !? */ + if (s->stop) + s->stop(); + } + + done: + /* Restore previous serial state */ + serial_current = saved_dev; + bd->bi_baudrate = saved_baud; + serial_reinit_all(); + serial_setbrg(); + + return ret; +} +#endif |