diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/serial/serial.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/serial/serial.c | 577 |
1 files changed, 0 insertions, 577 deletions
diff --git a/qemu/roms/u-boot/drivers/serial/serial.c b/qemu/roms/u-boot/drivers/serial/serial.c deleted file mode 100644 index fd61a5e54..000000000 --- a/qemu/roms/u-boot/drivers/serial/serial.c +++ /dev/null @@ -1,577 +0,0 @@ -/* - * (C) Copyright 2004 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <environment.h> -#include <serial.h> -#include <stdio_dev.h> -#include <post.h> -#include <linux/compiler.h> -#include <errno.h> - -DECLARE_GLOBAL_DATA_PTR; - -static struct serial_device *serial_devices; -static struct serial_device *serial_current; -/* - * Table with supported baudrates (defined in config_xyz.h) - */ -static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE; - -/** - * serial_null() - Void registration routine of a serial driver - * - * This routine implements a void registration routine of a serial - * driver. The registration routine of a particular driver is aliased - * to this empty function in case the driver is not compiled into - * U-Boot. - */ -static void serial_null(void) -{ -} - -/** - * on_baudrate() - Update the actual baudrate when the env var changes - * - * This will check for a valid baudrate and only apply it if valid. - */ -static int on_baudrate(const char *name, const char *value, enum env_op op, - int flags) -{ - int i; - int baudrate; - - switch (op) { - case env_op_create: - case env_op_overwrite: - /* - * Switch to new baudrate if new baudrate is supported - */ - baudrate = simple_strtoul(value, NULL, 10); - - /* Not actually changing */ - if (gd->baudrate == baudrate) - return 0; - - for (i = 0; i < ARRAY_SIZE(baudrate_table); ++i) { - if (baudrate == baudrate_table[i]) - break; - } - if (i == ARRAY_SIZE(baudrate_table)) { - if ((flags & H_FORCE) == 0) - printf("## Baudrate %d bps not supported\n", - baudrate); - return 1; - } - if ((flags & H_INTERACTIVE) != 0) { - printf("## Switch baudrate to %d" - " bps and press ENTER ...\n", baudrate); - udelay(50000); - } - - gd->baudrate = baudrate; - - serial_setbrg(); - - udelay(50000); - - if ((flags & H_INTERACTIVE) != 0) - while (1) { - if (getc() == '\r') - break; - } - - return 0; - case env_op_delete: - printf("## Baudrate may not be deleted\n"); - return 1; - default: - return 0; - } -} -U_BOOT_ENV_CALLBACK(baudrate, on_baudrate); - -/** - * serial_initfunc() - Forward declare of driver registration routine - * @name: Name of the real driver registration routine. - * - * This macro expands onto forward declaration of a driver registration - * routine, which is then used below in serial_initialize() function. - * The declaration is made weak and aliases to serial_null() so in case - * the driver is not compiled in, the function is still declared and can - * be used, but aliases to serial_null() and thus is optimized away. - */ -#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_initialize); -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(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(oc_serial_initialize); -serial_initfunc(sandbox_serial_initialize); -serial_initfunc(clps7111_serial_initialize); -serial_initfunc(imx_serial_initialize); -serial_initfunc(ks8695_serial_initialize); -serial_initfunc(lh7a40x_serial_initialize); -serial_initfunc(max3100_serial_initialize); -serial_initfunc(mxc_serial_initialize); -serial_initfunc(pl01x_serial_initialize); -serial_initfunc(sa1100_serial_initialize); -serial_initfunc(sh_serial_initialize); -serial_initfunc(arm_dcc_initialize); -serial_initfunc(mxs_auart_initialize); -serial_initfunc(arc_serial_initialize); - -/** - * serial_register() - Register serial driver with serial driver core - * @dev: Pointer to the serial driver structure - * - * This function registers the serial driver supplied via @dev with - * serial driver core, thus making U-Boot aware of it and making it - * available for U-Boot to use. On platforms that still require manual - * relocation of constant variables, relocation of the supplied structure - * is performed. - */ -void serial_register(struct serial_device *dev) -{ -#ifdef CONFIG_NEEDS_MANUAL_RELOC - if (dev->start) - dev->start += gd->reloc_off; - if (dev->stop) - dev->stop += gd->reloc_off; - if (dev->setbrg) - dev->setbrg += gd->reloc_off; - if (dev->getc) - dev->getc += gd->reloc_off; - if (dev->tstc) - dev->tstc += gd->reloc_off; - if (dev->putc) - dev->putc += gd->reloc_off; - if (dev->puts) - dev->puts += gd->reloc_off; -#endif - - dev->next = serial_devices; - serial_devices = dev; -} - -/** - * serial_initialize() - Register all compiled-in serial port drivers - * - * This function registers all serial port drivers that are compiled - * into the U-Boot binary with the serial core, thus making them - * available to U-Boot to use. Lastly, this function assigns a default - * serial port to the serial core. That serial port is then used as a - * default output. - */ -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_initialize(); - au1x00_serial_initialize(); - asc_serial_initialize(); - jz_serial_initialize(); - mpc5xx_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(); - oc_serial_initialize(); - sandbox_serial_initialize(); - clps7111_serial_initialize(); - imx_serial_initialize(); - ks8695_serial_initialize(); - lh7a40x_serial_initialize(); - max3100_serial_initialize(); - mxc_serial_initialize(); - pl01x_serial_initialize(); - sa1100_serial_initialize(); - sh_serial_initialize(); - arm_dcc_initialize(); - mxs_auart_initialize(); - arc_serial_initialize(); - - serial_assign(default_serial_console()->name); -} - -/** - * serial_stdio_init() - Register serial ports with STDIO core - * - * This function generates a proxy driver for each serial port driver. - * These proxy drivers then register with the STDIO core, making the - * serial drivers available as STDIO devices. - */ -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; - } -} - -/** - * serial_assign() - Select the serial output device by name - * @name: Name of the serial driver to be used as default output - * - * This function configures the serial output multiplexing by - * selecting which serial device will be used as default. In case - * the STDIO "serial" device is selected as stdin/stdout/stderr, - * the serial device previously configured by this function will be - * used for the particular operation. - * - * Returns 0 on success, negative on error. - */ -int serial_assign(const char *name) -{ - struct serial_device *s; - - for (s = serial_devices; s; s = s->next) { - if (strcmp(s->name, name)) - continue; - serial_current = s; - return 0; - } - - return -EINVAL; -} - -/** - * serial_reinit_all() - Reinitialize all compiled-in serial ports - * - * This function reinitializes all serial ports that are compiled - * into U-Boot by calling their serial_start() functions. - */ -void serial_reinit_all(void) -{ - struct serial_device *s; - - for (s = serial_devices; s; s = s->next) - s->start(); -} - -/** - * get_current() - Return pointer to currently selected serial port - * - * This function returns a pointer to currently selected serial port. - * The currently selected serial port is altered by serial_assign() - * function. - * - * In case this function is called before relocation or before any serial - * port is configured, this function calls default_serial_console() to - * determine the serial port. Otherwise, the configured serial port is - * returned. - * - * Returns pointer to the currently selected serial port on success, - * NULL on error. - */ -static struct serial_device *get_current(void) -{ - struct serial_device *dev; - - if (!(gd->flags & GD_FLG_RELOC)) - dev = default_serial_console(); - else if (!serial_current) - dev = default_serial_console(); - else - dev = serial_current; - - /* 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 - } - - return dev; -} - -/** - * serial_init() - Initialize currently selected serial port - * - * This function initializes the currently selected serial port. This - * usually involves setting up the registers of that particular port, - * enabling clock and such. This function uses the get_current() call - * to determine which port is selected. - * - * Returns 0 on success, negative on error. - */ -int serial_init(void) -{ - return get_current()->start(); -} - -/** - * serial_setbrg() - Configure baud-rate of currently selected serial port - * - * This function configures the baud-rate of the currently selected - * serial port. The baud-rate is retrieved from global data within - * the serial port driver. This function uses the get_current() call - * to determine which port is selected. - * - * Returns 0 on success, negative on error. - */ -void serial_setbrg(void) -{ - get_current()->setbrg(); -} - -/** - * serial_getc() - Read character from currently selected serial port - * - * This function retrieves a character from currently selected serial - * port. In case there is no character waiting on the serial port, - * this function will block and wait for the character to appear. This - * function uses the get_current() call to determine which port is - * selected. - * - * Returns the character on success, negative on error. - */ -int serial_getc(void) -{ - return get_current()->getc(); -} - -/** - * serial_tstc() - Test if data is available on currently selected serial port - * - * This function tests if one or more characters are available on - * currently selected serial port. This function never blocks. This - * function uses the get_current() call to determine which port is - * selected. - * - * Returns positive if character is available, zero otherwise. - */ -int serial_tstc(void) -{ - return get_current()->tstc(); -} - -/** - * serial_putc() - Output character via currently selected serial port - * @c: Single character to be output from the serial port. - * - * This function outputs a character via currently selected serial - * port. This character is passed to the serial port driver responsible - * for controlling the hardware. The hardware may still be in process - * of transmitting another character, therefore this function may block - * for a short amount of time. This function uses the get_current() - * call to determine which port is selected. - */ -void serial_putc(const char c) -{ - get_current()->putc(c); -} - -/** - * serial_puts() - Output string via currently selected serial port - * @s: Zero-terminated string to be output from the serial port. - * - * This function outputs a zero-terminated string via currently - * selected serial port. This function behaves as an accelerator - * in case the hardware can queue multiple characters for transfer. - * The whole string that is to be output is available to the function - * implementing the hardware manipulation. Transmitting the whole - * string may take some time, thus this function may block for some - * amount of time. This function uses the get_current() call to - * determine which port is selected. - */ -void serial_puts(const char *s) -{ - get_current()->puts(s); -} - -/** - * default_serial_puts() - Output string by calling serial_putc() in loop - * @s: Zero-terminated string to be output from the serial port. - * - * This function outputs a zero-terminated string by calling serial_putc() - * in a loop. Most drivers do not support queueing more than one byte for - * transfer, thus this function precisely implements their serial_puts(). - * - * To optimize the number of get_current() calls, this function only - * calls get_current() once and then directly accesses the putc() call - * of the &struct serial_device . - */ -void default_serial_puts(const char *s) -{ - struct serial_device *dev = get_current(); - while (*s) - dev->putc(*s++); -} - -#if CONFIG_POST & CONFIG_SYS_POST_UART -static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; - -/** - * uart_post_test() - Test the currently selected serial port using POST - * @flags: POST framework flags - * - * Do a loopback test of the currently selected serial port. This - * function is only useful in the context of the POST testing framwork. - * The serial port is firstly configured into loopback mode and then - * characters are sent through it. - * - * Returns 0 on success, value otherwise. - */ -/* 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; - - /* Save current serial state */ - ret = 0; - saved_dev = serial_current; - saved_baud = gd->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) { - gd->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; - gd->baudrate = saved_baud; - serial_reinit_all(); - serial_setbrg(); - - return ret; -} -#endif |