diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/serial/serial_sa1100.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/serial/serial_sa1100.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/drivers/serial/serial_sa1100.c b/qemu/roms/u-boot/drivers/serial/serial_sa1100.c new file mode 100644 index 000000000..78f241d85 --- /dev/null +++ b/qemu/roms/u-boot/drivers/serial/serial_sa1100.c @@ -0,0 +1,162 @@ +/* + * (C) Copyright 2002 + * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Alex Zuepke <azu@sysgo.de> + * + * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <SA-1100.h> +#include <serial.h> +#include <linux/compiler.h> + +DECLARE_GLOBAL_DATA_PTR; + +static void sa1100_serial_setbrg(void) +{ + unsigned int reg = 0; + + if (gd->baudrate == 1200) + reg = 191; + else if (gd->baudrate == 9600) + reg = 23; + else if (gd->baudrate == 19200) + reg = 11; + else if (gd->baudrate == 38400) + reg = 5; + else if (gd->baudrate == 57600) + reg = 3; + else if (gd->baudrate == 115200) + reg = 1; + else + hang (); + +#ifdef CONFIG_SERIAL1 + /* SA1110 uart function */ + Ser1SDCR0 |= SDCR0_SUS; + + /* Wait until port is ready ... */ + while(Ser1UTSR1 & UTSR1_TBY) {} + + /* init serial serial 1 */ + Ser1UTCR3 = 0x00; + Ser1UTSR0 = 0xff; + Ser1UTCR0 = ( UTCR0_1StpBit | UTCR0_8BitData ); + Ser1UTCR1 = 0; + Ser1UTCR2 = (u32)reg; + Ser1UTCR3 = ( UTCR3_RXE | UTCR3_TXE ); +#elif defined(CONFIG_SERIAL3) + /* Wait until port is ready ... */ + while (Ser3UTSR1 & UTSR1_TBY) { + } + + /* init serial serial 3 */ + Ser3UTCR3 = 0x00; + Ser3UTSR0 = 0xff; + Ser3UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData); + Ser3UTCR1 = 0; + Ser3UTCR2 = (u32) reg; + Ser3UTCR3 = (UTCR3_RXE | UTCR3_TXE); +#else +#error "Bad: you didn't configured serial ..." +#endif +} + + +/* + * Initialise the serial port with the given baudrate. The settings + * are always 8 data bits, no parity, 1 stop bit, no start bits. + * + */ +static int sa1100_serial_init(void) +{ + serial_setbrg (); + + return (0); +} + + +/* + * Output a single byte to the serial port. + */ +static void sa1100_serial_putc(const char c) +{ +#ifdef CONFIG_SERIAL1 + /* wait for room in the tx FIFO on SERIAL1 */ + while ((Ser1UTSR0 & UTSR0_TFS) == 0); + + Ser1UTDR = c; +#elif defined(CONFIG_SERIAL3) + /* wait for room in the tx FIFO on SERIAL3 */ + while ((Ser3UTSR0 & UTSR0_TFS) == 0); + + Ser3UTDR = c; +#endif + + /* If \n, also do \r */ + if (c == '\n') + serial_putc ('\r'); +} + +/* + * Read a single byte from the serial port. Returns 1 on success, 0 + * otherwise. When the function is succesfull, the character read is + * written into its argument c. + */ +static int sa1100_serial_tstc(void) +{ +#ifdef CONFIG_SERIAL1 + return Ser1UTSR1 & UTSR1_RNE; +#elif defined(CONFIG_SERIAL3) + return Ser3UTSR1 & UTSR1_RNE; +#endif +} + +/* + * Read a single byte from the serial port. Returns 1 on success, 0 + * otherwise. When the function is succesfull, the character read is + * written into its argument c. + */ +static int sa1100_serial_getc(void) +{ +#ifdef CONFIG_SERIAL1 + while (!(Ser1UTSR1 & UTSR1_RNE)); + + return (char) Ser1UTDR & 0xff; +#elif defined(CONFIG_SERIAL3) + while (!(Ser3UTSR1 & UTSR1_RNE)); + + return (char) Ser3UTDR & 0xff; +#endif +} + +static struct serial_device sa1100_serial_drv = { + .name = "sa1100_serial", + .start = sa1100_serial_init, + .stop = NULL, + .setbrg = sa1100_serial_setbrg, + .putc = sa1100_serial_putc, + .puts = default_serial_puts, + .getc = sa1100_serial_getc, + .tstc = sa1100_serial_tstc, +}; + +void sa1100_serial_initialize(void) +{ + serial_register(&sa1100_serial_drv); +} + +__weak struct serial_device *default_serial_console(void) +{ + return &sa1100_serial_drv; +} |