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1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
169 lines
3.4 KiB
C
169 lines
3.4 KiB
C
/*
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* (C) Copyright 2003
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* Martin Winistoerfer, martinwinistoerfer@gmx.ch.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/*
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* File: serial.c
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*
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* Discription: Serial interface driver for SCI1 and SCI2.
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* Since this code will be called from ROM use
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* only non-static local variables.
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*
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <command.h>
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#include <mpc5xx.h>
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#include <serial.h>
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#include <linux/compiler.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Local functions
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*/
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static int ready_to_send(void)
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{
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volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
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volatile short status;
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do {
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#if defined(CONFIG_5xx_CONS_SCI1)
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status = immr->im_qsmcm.qsmcm_sc1sr;
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#else
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status = immr->im_qsmcm.qsmcm_sc2sr;
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#endif
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#if defined(CONFIG_WATCHDOG)
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reset_5xx_watchdog (immr);
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#endif
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} while ((status & SCI_TDRE) == 0);
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return 1;
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}
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/*
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* Minimal global serial functions needed to use one of the SCI modules.
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*/
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static int mpc5xx_serial_init(void)
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{
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volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
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serial_setbrg();
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#if defined(CONFIG_5xx_CONS_SCI1)
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/* 10-Bit, 1 start bit, 8 data bit, no parity, 1 stop bit */
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immr->im_qsmcm.qsmcm_scc1r1 = SCI_M_10;
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immr->im_qsmcm.qsmcm_scc1r1 = SCI_TE | SCI_RE;
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#else
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immr->im_qsmcm.qsmcm_scc2r1 = SCI_M_10;
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immr->im_qsmcm.qsmcm_scc2r1 = SCI_TE | SCI_RE;
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#endif
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return 0;
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}
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static void mpc5xx_serial_putc(const char c)
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{
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volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
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/* Test for completition */
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if(ready_to_send()) {
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#if defined(CONFIG_5xx_CONS_SCI1)
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immr->im_qsmcm.qsmcm_sc1dr = (short)c;
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#else
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immr->im_qsmcm.qsmcm_sc2dr = (short)c;
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#endif
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if(c == '\n') {
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if(ready_to_send());
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#if defined(CONFIG_5xx_CONS_SCI1)
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immr->im_qsmcm.qsmcm_sc1dr = (short)'\r';
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#else
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immr->im_qsmcm.qsmcm_sc2dr = (short)'\r';
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#endif
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}
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}
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}
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static int mpc5xx_serial_getc(void)
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{
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volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
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volatile short status;
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unsigned char tmp;
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/* New data ? */
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do {
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#if defined(CONFIG_5xx_CONS_SCI1)
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status = immr->im_qsmcm.qsmcm_sc1sr;
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#else
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status = immr->im_qsmcm.qsmcm_sc2sr;
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#endif
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#if defined(CONFIG_WATCHDOG)
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reset_5xx_watchdog (immr);
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#endif
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} while ((status & SCI_RDRF) == 0);
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/* Read data */
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#if defined(CONFIG_5xx_CONS_SCI1)
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tmp = (unsigned char)(immr->im_qsmcm.qsmcm_sc1dr & SCI_SCXDR_MK);
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#else
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tmp = (unsigned char)( immr->im_qsmcm.qsmcm_sc2dr & SCI_SCXDR_MK);
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#endif
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return tmp;
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}
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static int mpc5xx_serial_tstc(void)
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{
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volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
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short status;
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/* New data character ? */
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#if defined(CONFIG_5xx_CONS_SCI1)
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status = immr->im_qsmcm.qsmcm_sc1sr;
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#else
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status = immr->im_qsmcm.qsmcm_sc2sr;
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#endif
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return (status & SCI_RDRF);
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}
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static void mpc5xx_serial_setbrg(void)
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{
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volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
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short scxbr;
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/* Set baudrate */
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scxbr = (gd->cpu_clk / (32 * gd->baudrate));
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#if defined(CONFIG_5xx_CONS_SCI1)
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immr->im_qsmcm.qsmcm_scc1r0 = (scxbr & SCI_SCXBR_MK);
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#else
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immr->im_qsmcm.qsmcm_scc2r0 = (scxbr & SCI_SCXBR_MK);
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#endif
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}
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static struct serial_device mpc5xx_serial_drv = {
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.name = "mpc5xx_serial",
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.start = mpc5xx_serial_init,
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.stop = NULL,
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.setbrg = mpc5xx_serial_setbrg,
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.putc = mpc5xx_serial_putc,
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.puts = default_serial_puts,
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.getc = mpc5xx_serial_getc,
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.tstc = mpc5xx_serial_tstc,
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};
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void mpc5xx_serial_initialize(void)
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{
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serial_register(&mpc5xx_serial_drv);
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}
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__weak struct serial_device *default_serial_console(void)
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{
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return &mpc5xx_serial_drv;
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}
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