/* * (C) Copyright 2000 - 2003 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * * Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with * changes based on the file arch/ppc/mbxboot/m8260_tty.c from the * Linux/PPC sources (m8260_tty.c had no copyright info in it). */ /* * Minimal serial functions needed to use one of the PSC ports * as serial console interface. */ #include <common.h> #include <mpc5xxx.h> #if defined(CONFIG_PSC_CONSOLE) #if CONFIG_PSC_CONSOLE == 1 #define PSC_BASE MPC5XXX_PSC1 #elif CONFIG_PSC_CONSOLE == 2 #define PSC_BASE MPC5XXX_PSC2 #elif CONFIG_PSC_CONSOLE == 3 #define PSC_BASE MPC5XXX_PSC3 #elif defined(CONFIG_MGT5100) #error CONFIG_PSC_CONSOLE must be in 1, 2 or 3 #elif CONFIG_PSC_CONSOLE == 4 #define PSC_BASE MPC5XXX_PSC4 #elif CONFIG_PSC_CONSOLE == 5 #define PSC_BASE MPC5XXX_PSC5 #elif CONFIG_PSC_CONSOLE == 6 #define PSC_BASE MPC5XXX_PSC6 #else #error CONFIG_PSC_CONSOLE must be in 1 ... 6 #endif int serial_init (void) { DECLARE_GLOBAL_DATA_PTR; volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE; unsigned long baseclk; int div; /* reset PSC */ psc->command = PSC_SEL_MODE_REG_1; /* select clock sources */ #if defined(CONFIG_MGT5100) psc->psc_clock_select = 0xdd00; baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32; #elif defined(CONFIG_MPC5200) psc->psc_clock_select = 0; baseclk = (gd->ipb_clk + 16) / 32; #endif /* switch to UART mode */ psc->sicr = 0; /* configure parity, bit length and so on */ #if defined(CONFIG_MGT5100) psc->mode = PSC_MODE_ERR | PSC_MODE_8_BITS | PSC_MODE_PARNONE; #elif defined(CONFIG_MPC5200) psc->mode = PSC_MODE_8_BITS | PSC_MODE_PARNONE; #endif psc->mode = PSC_MODE_ONE_STOP; /* set up UART divisor */ div = (baseclk + (gd->baudrate/2)) / gd->baudrate; psc->ctur = (div >> 8) & 0xff; psc->ctlr = div & 0xff; /* disable all interrupts */ psc->psc_imr = 0; /* reset and enable Rx/Tx */ psc->command = PSC_RST_RX; psc->command = PSC_RST_TX; psc->command = PSC_RX_ENABLE | PSC_TX_ENABLE; return (0); } void serial_putc(const char c) { volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE; if (c == '\n') serial_putc('\r'); /* Wait for last character to go. */ while (!(psc->psc_status & PSC_SR_TXEMP)) ; psc->psc_buffer_8 = c; } void serial_puts (const char *s) { while (*s) { serial_putc (*s++); } } int serial_getc(void) { volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE; /* Wait for a character to arrive. */ while (!(psc->psc_status & PSC_SR_RXRDY)) ; return psc->psc_buffer_8; } int serial_tstc(void) { volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE; return (psc->psc_status & PSC_SR_RXRDY); } void serial_setbrg(void) { DECLARE_GLOBAL_DATA_PTR; volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE; unsigned long baseclk, div; #if defined(CONFIG_MGT5100) baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32; #elif defined(CONFIG_MPC5200) baseclk = (gd->ipb_clk + 16) / 32; #endif /* set up UART divisor */ div = (baseclk + (gd->baudrate/2)) / gd->baudrate; psc->ctur = (div >> 8) & 0xFF; psc->ctlr = div & 0xff; } #endif /* CONFIG_PSC_CONSOLE */