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https://github.com/brain-hackers/u-boot-brain
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f2041388bd
Having both USBTTY and CONFIG_SERIAL_MULTI enabled in SPL, the usbtty.c file is protected in Makefile to not be compiled into the SPL. Yet, the ns16550 serial driver does not contain such protection. Add it to avoid missing symbol error. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Tom Rini <trini@ti.com>
119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
/*
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* COM1 NS16550 support
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* originally from linux source (arch/powerpc/boot/ns16550.c)
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* modified to use CONFIG_SYS_ISA_MEM and new defines
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*/
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#include <config.h>
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#include <ns16550.h>
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#include <watchdog.h>
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#include <linux/types.h>
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#include <asm/io.h>
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#define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */
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#define UART_MCRVAL (UART_MCR_DTR | \
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UART_MCR_RTS) /* RTS/DTR */
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#define UART_FCRVAL (UART_FCR_FIFO_EN | \
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UART_FCR_RXSR | \
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UART_FCR_TXSR) /* Clear & enable FIFOs */
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#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
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#define serial_out(x, y) outb(x, (ulong)y)
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#define serial_in(y) inb((ulong)y)
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#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE > 0)
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#define serial_out(x, y) out_be32(y, x)
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#define serial_in(y) in_be32(y)
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#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE < 0)
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#define serial_out(x, y) out_le32(y, x)
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#define serial_in(y) in_le32(y)
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#else
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#define serial_out(x, y) writeb(x, y)
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#define serial_in(y) readb(y)
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#endif
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#ifndef CONFIG_SYS_NS16550_IER
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#define CONFIG_SYS_NS16550_IER 0x00
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#endif /* CONFIG_SYS_NS16550_IER */
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void NS16550_init(NS16550_t com_port, int baud_divisor)
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{
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serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
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#if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \
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defined(CONFIG_AM33XX)
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serial_out(0x7, &com_port->mdr1); /* mode select reset TL16C750*/
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#endif
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serial_out(UART_LCR_BKSE | UART_LCRVAL, (ulong)&com_port->lcr);
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serial_out(0, &com_port->dll);
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serial_out(0, &com_port->dlm);
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serial_out(UART_LCRVAL, &com_port->lcr);
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serial_out(UART_MCRVAL, &com_port->mcr);
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serial_out(UART_FCRVAL, &com_port->fcr);
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serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
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serial_out(baud_divisor & 0xff, &com_port->dll);
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serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
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serial_out(UART_LCRVAL, &com_port->lcr);
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#if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \
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defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX)
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#if defined(CONFIG_APTIX)
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/* /13 mode so Aptix 6MHz can hit 115200 */
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serial_out(3, &com_port->mdr1);
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#else
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/* /16 is proper to hit 115200 with 48MHz */
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serial_out(0, &com_port->mdr1);
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#endif
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#endif /* CONFIG_OMAP */
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}
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#ifndef CONFIG_NS16550_MIN_FUNCTIONS
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void NS16550_reinit(NS16550_t com_port, int baud_divisor)
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{
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serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
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serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
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serial_out(0, &com_port->dll);
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serial_out(0, &com_port->dlm);
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serial_out(UART_LCRVAL, &com_port->lcr);
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serial_out(UART_MCRVAL, &com_port->mcr);
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serial_out(UART_FCRVAL, &com_port->fcr);
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serial_out(UART_LCR_BKSE, &com_port->lcr);
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serial_out(baud_divisor & 0xff, &com_port->dll);
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serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
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serial_out(UART_LCRVAL, &com_port->lcr);
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}
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#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
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void NS16550_putc(NS16550_t com_port, char c)
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{
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while ((serial_in(&com_port->lsr) & UART_LSR_THRE) == 0)
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;
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serial_out(c, &com_port->thr);
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/*
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* Call watchdog_reset() upon newline. This is done here in putc
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* since the environment code uses a single puts() to print the complete
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* environment upon "printenv". So we can't put this watchdog call
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* in puts().
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*/
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if (c == '\n')
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WATCHDOG_RESET();
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}
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#ifndef CONFIG_NS16550_MIN_FUNCTIONS
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char NS16550_getc(NS16550_t com_port)
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{
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while ((serial_in(&com_port->lsr) & UART_LSR_DR) == 0) {
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#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_TTY)
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extern void usbtty_poll(void);
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usbtty_poll();
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#endif
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WATCHDOG_RESET();
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}
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return serial_in(&com_port->rbr);
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}
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int NS16550_tstc(NS16550_t com_port)
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{
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return (serial_in(&com_port->lsr) & UART_LSR_DR) != 0;
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}
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#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
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