console: copy ns16550 driver from u-boot
BUG=chrome-os-partner:35807 BRANCH=broadcom-firmware TEST=none Change-Id: I40623e92f290e5c584a451d99071316b6fc35431 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 505720f734da7a4cdfaff8b2531385644141ba83 Original-Change-Id: I655c7065047971ab05a13e90ab911d7464a37552 Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/251300 Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-on: http://review.coreboot.org/9764 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
This commit is contained in:
Daisuke Nojiri
Patrick Georgi
parent
76e3303290
commit
3a2ac88e40
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/*
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* NS16550 Serial Port
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* originally from linux source (arch/powerpc/boot/ns16550.h)
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*
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* Cleanup and unification
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* (C) 2009 by Detlev Zundel, DENX Software Engineering GmbH
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*
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* modified slightly to
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* have addresses as offsets from CONFIG_SYS_ISA_BASE
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* added a few more definitions
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* added prototypes for ns16550.c
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* reduced no of com ports to 2
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* modifications (c) Rob Taylor, Flying Pig Systems. 2000.
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*
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* added support for port on 64-bit bus
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* by Richard Danter (richard.danter@windriver.com), (C) 2005 Wind River Systems
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*/
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/*
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* Note that the following macro magic uses the fact that the compiler
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* will not allocate storage for arrays of size 0
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*/
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#include <linux/types.h>
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#if !defined(CONFIG_SYS_NS16550_REG_SIZE) || (CONFIG_SYS_NS16550_REG_SIZE == 0)
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#error "Please define NS16550 registers size."
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#elif defined(CONFIG_SYS_NS16550_MEM32)
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#define UART_REG(x) u32 x
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#elif (CONFIG_SYS_NS16550_REG_SIZE > 0)
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#define UART_REG(x) \
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unsigned char prepad_##x[CONFIG_SYS_NS16550_REG_SIZE - 1]; \
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unsigned char x;
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#elif (CONFIG_SYS_NS16550_REG_SIZE < 0)
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#define UART_REG(x) \
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unsigned char x; \
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unsigned char postpad_##x[-CONFIG_SYS_NS16550_REG_SIZE - 1];
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#endif
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struct NS16550 {
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UART_REG(rbr); /* 0 */
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UART_REG(ier); /* 1 */
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UART_REG(fcr); /* 2 */
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UART_REG(lcr); /* 3 */
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UART_REG(mcr); /* 4 */
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UART_REG(lsr); /* 5 */
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UART_REG(msr); /* 6 */
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UART_REG(spr); /* 7 */
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#ifdef CONFIG_SOC_DA8XX
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UART_REG(reg8); /* 8 */
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UART_REG(reg9); /* 9 */
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UART_REG(revid1); /* A */
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UART_REG(revid2); /* B */
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UART_REG(pwr_mgmt); /* C */
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UART_REG(mdr1); /* D */
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#else
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UART_REG(mdr1); /* 8 */
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UART_REG(reg9); /* 9 */
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UART_REG(regA); /* A */
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UART_REG(regB); /* B */
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UART_REG(regC); /* C */
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UART_REG(regD); /* D */
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UART_REG(regE); /* E */
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UART_REG(uasr); /* F */
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UART_REG(scr); /* 10*/
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UART_REG(ssr); /* 11*/
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UART_REG(reg12); /* 12*/
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UART_REG(osc_12m_sel); /* 13*/
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#endif
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};
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#define thr rbr
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#define iir fcr
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#define dll rbr
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#define dlm ier
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typedef struct NS16550 *NS16550_t;
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/*
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* These are the definitions for the FIFO Control Register
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*/
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#define UART_FCR_FIFO_EN 0x01 /* Fifo enable */
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#define UART_FCR_CLEAR_RCVR 0x02 /* Clear the RCVR FIFO */
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#define UART_FCR_CLEAR_XMIT 0x04 /* Clear the XMIT FIFO */
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#define UART_FCR_DMA_SELECT 0x08 /* For DMA applications */
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#define UART_FCR_TRIGGER_MASK 0xC0 /* Mask for the FIFO trigger range */
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#define UART_FCR_TRIGGER_1 0x00 /* Mask for trigger set at 1 */
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#define UART_FCR_TRIGGER_4 0x40 /* Mask for trigger set at 4 */
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#define UART_FCR_TRIGGER_8 0x80 /* Mask for trigger set at 8 */
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#define UART_FCR_TRIGGER_14 0xC0 /* Mask for trigger set at 14 */
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#define UART_FCR_RXSR 0x02 /* Receiver soft reset */
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#define UART_FCR_TXSR 0x04 /* Transmitter soft reset */
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/*
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* These are the definitions for the Modem Control Register
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*/
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#define UART_MCR_DTR 0x01 /* DTR */
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#define UART_MCR_RTS 0x02 /* RTS */
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#define UART_MCR_OUT1 0x04 /* Out 1 */
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#define UART_MCR_OUT2 0x08 /* Out 2 */
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#define UART_MCR_LOOP 0x10 /* Enable loopback test mode */
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#define UART_MCR_DMA_EN 0x04
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#define UART_MCR_TX_DFR 0x08
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/*
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* These are the definitions for the Line Control Register
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*
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* Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting
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* UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits.
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*/
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#define UART_LCR_WLS_MSK 0x03 /* character length select mask */
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#define UART_LCR_WLS_5 0x00 /* 5 bit character length */
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#define UART_LCR_WLS_6 0x01 /* 6 bit character length */
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#define UART_LCR_WLS_7 0x02 /* 7 bit character length */
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#define UART_LCR_WLS_8 0x03 /* 8 bit character length */
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#define UART_LCR_STB 0x04 /* # stop Bits, off=1, on=1.5 or 2) */
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#define UART_LCR_PEN 0x08 /* Parity eneble */
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#define UART_LCR_EPS 0x10 /* Even Parity Select */
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#define UART_LCR_STKP 0x20 /* Stick Parity */
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#define UART_LCR_SBRK 0x40 /* Set Break */
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#define UART_LCR_BKSE 0x80 /* Bank select enable */
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#define UART_LCR_DLAB 0x80 /* Divisor latch access bit */
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/*
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* These are the definitions for the Line Status Register
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*/
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#define UART_LSR_DR 0x01 /* Data ready */
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#define UART_LSR_OE 0x02 /* Overrun */
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#define UART_LSR_PE 0x04 /* Parity error */
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#define UART_LSR_FE 0x08 /* Framing error */
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#define UART_LSR_BI 0x10 /* Break */
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#define UART_LSR_THRE 0x20 /* Xmit holding register empty */
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#define UART_LSR_TEMT 0x40 /* Xmitter empty */
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#define UART_LSR_ERR 0x80 /* Error */
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#define UART_MSR_DCD 0x80 /* Data Carrier Detect */
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#define UART_MSR_RI 0x40 /* Ring Indicator */
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#define UART_MSR_DSR 0x20 /* Data Set Ready */
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#define UART_MSR_CTS 0x10 /* Clear to Send */
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#define UART_MSR_DDCD 0x08 /* Delta DCD */
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#define UART_MSR_TERI 0x04 /* Trailing edge ring indicator */
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#define UART_MSR_DDSR 0x02 /* Delta DSR */
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#define UART_MSR_DCTS 0x01 /* Delta CTS */
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/*
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* These are the definitions for the Interrupt Identification Register
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*/
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#define UART_IIR_NO_INT 0x01 /* No interrupts pending */
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#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */
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#define UART_IIR_MSI 0x00 /* Modem status interrupt */
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#define UART_IIR_THRI 0x02 /* Transmitter holding register empty */
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#define UART_IIR_RDI 0x04 /* Receiver data interrupt */
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#define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */
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/*
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* These are the definitions for the Interrupt Enable Register
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*/
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#define UART_IER_MSI 0x08 /* Enable Modem status interrupt */
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#define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */
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#define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */
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#define UART_IER_RDI 0x01 /* Enable receiver data interrupt */
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#ifdef CONFIG_OMAP1510
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#define OSC_12M_SEL 0x01 /* selects 6.5 * current clk div */
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#endif
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/* useful defaults for LCR */
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#define UART_LCR_8N1 0x03
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void NS16550_init(NS16550_t com_port, int baud_divisor);
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void NS16550_putc(NS16550_t com_port, char c);
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char NS16550_getc(NS16550_t com_port);
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int NS16550_tstc(NS16550_t com_port);
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void NS16550_reinit(NS16550_t com_port, int baud_divisor);
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/*
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* (C) Copyright 2000
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* Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <linux/compiler.h>
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#include <ns16550.h>
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#ifdef CONFIG_NS87308
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#include <ns87308.h>
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#endif
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#include <serial.h>
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#ifndef CONFIG_NS16550_MIN_FUNCTIONS
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DECLARE_GLOBAL_DATA_PTR;
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#if !defined(CONFIG_CONS_INDEX)
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#elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
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#error "Invalid console index value."
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#endif
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#if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
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#error "Console port 1 defined but not configured."
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#elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
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#error "Console port 2 defined but not configured."
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#elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
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#error "Console port 3 defined but not configured."
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#elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
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#error "Console port 4 defined but not configured."
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#elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
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#error "Console port 5 defined but not configured."
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#elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
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#error "Console port 6 defined but not configured."
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#endif
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/* Note: The port number specified in the functions is 1 based.
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* the array is 0 based.
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*/
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static NS16550_t serial_ports[6] = {
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#ifdef CONFIG_SYS_NS16550_COM1
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(NS16550_t)CONFIG_SYS_NS16550_COM1,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM2
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(NS16550_t)CONFIG_SYS_NS16550_COM2,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM3
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(NS16550_t)CONFIG_SYS_NS16550_COM3,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM4
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(NS16550_t)CONFIG_SYS_NS16550_COM4,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM5
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(NS16550_t)CONFIG_SYS_NS16550_COM5,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM6
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(NS16550_t)CONFIG_SYS_NS16550_COM6
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#else
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NULL
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#endif
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};
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#define PORT serial_ports[port-1]
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/* Multi serial device functions */
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#define DECLARE_ESERIAL_FUNCTIONS(port) \
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static int eserial##port##_init(void) \
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{ \
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int clock_divisor; \
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clock_divisor = calc_divisor(serial_ports[port-1]); \
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NS16550_init(serial_ports[port-1], clock_divisor); \
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return 0 ; \
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} \
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static void eserial##port##_setbrg(void) \
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{ \
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serial_setbrg_dev(port); \
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} \
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static int eserial##port##_getc(void) \
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{ \
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return serial_getc_dev(port); \
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} \
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static int eserial##port##_tstc(void) \
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{ \
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return serial_tstc_dev(port); \
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} \
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static void eserial##port##_putc(const char c) \
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{ \
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serial_putc_dev(port, c); \
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} \
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static void eserial##port##_puts(const char *s) \
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{ \
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serial_puts_dev(port, s); \
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}
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/* Serial device descriptor */
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#define INIT_ESERIAL_STRUCTURE(port, __name) { \
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.name = __name, \
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.start = eserial##port##_init, \
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.stop = NULL, \
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.setbrg = eserial##port##_setbrg, \
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.getc = eserial##port##_getc, \
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.tstc = eserial##port##_tstc, \
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.putc = eserial##port##_putc, \
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.puts = eserial##port##_puts, \
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}
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int calc_divisor(NS16550_t port)
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{
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#ifdef CONFIG_OMAP1510
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/* If can't cleanly clock 115200 set div to 1 */
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if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
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port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
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return (1); /* return 1 for base divisor */
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}
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port->osc_12m_sel = 0; /* clear if previsouly set */
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#endif
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#ifdef CONFIG_OMAP1610
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/* If can't cleanly clock 115200 set div to 1 */
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if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
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return (26); /* return 26 for base divisor */
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}
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#endif
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#define MODE_X_DIV 16
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/* Compute divisor value. Normally, we should simply return:
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* CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
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* but we need to round that value by adding 0.5.
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* Rounding is especially important at high baud rates.
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*/
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return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
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(MODE_X_DIV * gd->baudrate);
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}
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void
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_serial_putc(const char c,const int port)
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{
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if (c == '\n')
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NS16550_putc(PORT, '\r');
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NS16550_putc(PORT, c);
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}
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void
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_serial_putc_raw(const char c,const int port)
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{
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NS16550_putc(PORT, c);
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}
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void
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_serial_puts (const char *s,const int port)
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{
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while (*s) {
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_serial_putc (*s++,port);
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}
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}
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int
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_serial_getc(const int port)
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{
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return NS16550_getc(PORT);
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}
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int
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_serial_tstc(const int port)
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{
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return NS16550_tstc(PORT);
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}
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void
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_serial_setbrg (const int port)
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{
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int clock_divisor;
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clock_divisor = calc_divisor(PORT);
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NS16550_reinit(PORT, clock_divisor);
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}
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static inline void
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serial_putc_dev(unsigned int dev_index,const char c)
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{
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_serial_putc(c,dev_index);
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}
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static inline void
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serial_putc_raw_dev(unsigned int dev_index,const char c)
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{
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_serial_putc_raw(c,dev_index);
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}
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static inline void
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serial_puts_dev(unsigned int dev_index,const char *s)
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{
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_serial_puts(s,dev_index);
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}
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static inline int
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serial_getc_dev(unsigned int dev_index)
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{
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return _serial_getc(dev_index);
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}
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static inline int
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serial_tstc_dev(unsigned int dev_index)
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{
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return _serial_tstc(dev_index);
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}
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static inline void
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serial_setbrg_dev(unsigned int dev_index)
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{
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_serial_setbrg(dev_index);
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}
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#if defined(CONFIG_SYS_NS16550_COM1)
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DECLARE_ESERIAL_FUNCTIONS(1);
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struct serial_device eserial1_device =
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INIT_ESERIAL_STRUCTURE(1, "eserial0");
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#endif
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#if defined(CONFIG_SYS_NS16550_COM2)
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DECLARE_ESERIAL_FUNCTIONS(2);
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struct serial_device eserial2_device =
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INIT_ESERIAL_STRUCTURE(2, "eserial1");
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#endif
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#if defined(CONFIG_SYS_NS16550_COM3)
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DECLARE_ESERIAL_FUNCTIONS(3);
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struct serial_device eserial3_device =
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INIT_ESERIAL_STRUCTURE(3, "eserial2");
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#endif
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#if defined(CONFIG_SYS_NS16550_COM4)
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DECLARE_ESERIAL_FUNCTIONS(4);
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struct serial_device eserial4_device =
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INIT_ESERIAL_STRUCTURE(4, "eserial3");
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#endif
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#if defined(CONFIG_SYS_NS16550_COM5)
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DECLARE_ESERIAL_FUNCTIONS(5);
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struct serial_device eserial5_device =
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INIT_ESERIAL_STRUCTURE(5, "eserial4");
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#endif
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#if defined(CONFIG_SYS_NS16550_COM6)
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||||
DECLARE_ESERIAL_FUNCTIONS(6);
|
||||
struct serial_device eserial6_device =
|
||||
INIT_ESERIAL_STRUCTURE(6, "eserial5");
|
||||
#endif
|
||||
|
||||
__weak struct serial_device *default_serial_console(void)
|
||||
{
|
||||
#if CONFIG_CONS_INDEX == 1
|
||||
return &eserial1_device;
|
||||
#elif CONFIG_CONS_INDEX == 2
|
||||
return &eserial2_device;
|
||||
#elif CONFIG_CONS_INDEX == 3
|
||||
return &eserial3_device;
|
||||
#elif CONFIG_CONS_INDEX == 4
|
||||
return &eserial4_device;
|
||||
#elif CONFIG_CONS_INDEX == 5
|
||||
return &eserial5_device;
|
||||
#elif CONFIG_CONS_INDEX == 6
|
||||
return &eserial6_device;
|
||||
#else
|
||||
#error "Bad CONFIG_CONS_INDEX."
|
||||
#endif
|
||||
}
|
||||
|
||||
void ns16550_serial_initialize(void)
|
||||
{
|
||||
#if defined(CONFIG_SYS_NS16550_COM1)
|
||||
serial_register(&eserial1_device);
|
||||
#endif
|
||||
#if defined(CONFIG_SYS_NS16550_COM2)
|
||||
serial_register(&eserial2_device);
|
||||
#endif
|
||||
#if defined(CONFIG_SYS_NS16550_COM3)
|
||||
serial_register(&eserial3_device);
|
||||
#endif
|
||||
#if defined(CONFIG_SYS_NS16550_COM4)
|
||||
serial_register(&eserial4_device);
|
||||
#endif
|
||||
#if defined(CONFIG_SYS_NS16550_COM5)
|
||||
serial_register(&eserial5_device);
|
||||
#endif
|
||||
#if defined(CONFIG_SYS_NS16550_COM6)
|
||||
serial_register(&eserial6_device);
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif /* !CONFIG_NS16550_MIN_FUNCTIONS */
|
||||
Loading…
Reference in New Issue