diff options
Diffstat (limited to 'cpu/mpc512x/serial.c')
| -rw-r--r-- | cpu/mpc512x/serial.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/cpu/mpc512x/serial.c b/cpu/mpc512x/serial.c deleted file mode 100644 index ec2f41b..0000000 --- a/cpu/mpc512x/serial.c +++ /dev/null @@ -1,193 +0,0 @@ -/* - * (C) Copyright 2000 - 2010 - * 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 - * - * Based ont the MPC5200 PSC driver. - * Adapted for MPC512x by Jan Wrobel <wrr@semihalf.com> - */ - -/* - * Minimal serial functions needed to use one of the PSC ports - * as serial console interface. - */ - -#include <common.h> -#include <asm/io.h> -#include <asm/processor.h> - -DECLARE_GLOBAL_DATA_PTR; - -#if defined(CONFIG_PSC_CONSOLE) - -static void fifo_init (volatile psc512x_t *psc) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - - /* reset Rx & Tx fifo slice */ - out_be32(&psc->rfcmd, PSC_FIFO_RESET_SLICE); - out_be32(&psc->tfcmd, PSC_FIFO_RESET_SLICE); - - /* disable Tx & Rx FIFO interrupts */ - out_be32(&psc->rfintmask, 0); - out_be32(&psc->tfintmask, 0); - - out_be32(&psc->tfsize, CONSOLE_FIFO_TX_SIZE | (CONSOLE_FIFO_TX_ADDR << 16)); - out_be32(&psc->rfsize, CONSOLE_FIFO_RX_SIZE | (CONSOLE_FIFO_RX_ADDR << 16)); - - /* enable Tx & Rx FIFO slice */ - out_be32(&psc->rfcmd, PSC_FIFO_ENABLE_SLICE); - out_be32(&psc->tfcmd, PSC_FIFO_ENABLE_SLICE); - - out_be32(&im->fifoc.fifoc_cmd, FIFOC_DISABLE_CLOCK_GATE); - __asm__ volatile ("sync"); -} - -void serial_setbrg(void) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - volatile psc512x_t *psc = (psc512x_t *) &im->psc[CONFIG_PSC_CONSOLE]; - unsigned long baseclk, div; - - /* calculate dividor for setting PSC CTUR and CTLR registers */ - baseclk = (gd->ips_clk + 8) / 16; - div = (baseclk + (gd->baudrate / 2)) / gd->baudrate; - - out_8(&psc->ctur, (div >> 8) & 0xff); - out_8(&psc->ctlr, div & 0xff); /* set baudrate */ -} - -int serial_init(void) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - volatile psc512x_t *psc = (psc512x_t *) &im->psc[CONFIG_PSC_CONSOLE]; - - fifo_init (psc); - - /* set MR register to point to MR1 */ - out_8(&psc->command, PSC_SEL_MODE_REG_1); - - /* disable Tx/Rx */ - out_8(&psc->command, PSC_TX_DISABLE | PSC_RX_DISABLE); - - /* choose the prescaler by 16 for the Tx/Rx clock generation */ - out_be16(&psc->psc_clock_select, 0xdd00); - - /* switch to UART mode */ - out_be32(&psc->sicr, 0); - - /* mode register points to mr1 */ - /* configure parity, bit length and so on in mode register 1*/ - out_8(&psc->mode, PSC_MODE_8_BITS | PSC_MODE_PARNONE); - /* now, mode register points to mr2 */ - out_8(&psc->mode, PSC_MODE_1_STOPBIT); - - /* set baudrate */ - serial_setbrg(); - - /* disable all interrupts */ - out_be16(&psc->psc_imr, 0); - - /* reset and enable Rx/Tx */ - out_8(&psc->command, PSC_RST_RX); - out_8(&psc->command, PSC_RST_TX); - out_8(&psc->command, PSC_RX_ENABLE | PSC_TX_ENABLE); - - return 0; -} - -void serial_putc (const char c) -{ - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - volatile psc512x_t *psc = (psc512x_t *) &im->psc[CONFIG_PSC_CONSOLE]; - - if (c == '\n') - serial_putc ('\r'); - - /* Wait for last character to go. */ - while (!(in_be16(&psc->psc_status) & PSC_SR_TXEMP)) - ; - - out_8(&psc->tfdata_8, c); -} - -void serial_putc_raw (const char c) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - volatile psc512x_t *psc = (psc512x_t *) &im->psc[CONFIG_PSC_CONSOLE]; - - /* Wait for last character to go. */ - while (!(in_be16(&psc->psc_status) & PSC_SR_TXEMP)) - ; - - out_8(&psc->tfdata_8, c); -} - - -void serial_puts (const char *s) -{ - while (*s) { - serial_putc (*s++); - } -} - -int serial_getc (void) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - volatile psc512x_t *psc = (psc512x_t *) &im->psc[CONFIG_PSC_CONSOLE]; - - /* Wait for a character to arrive. */ - while (in_be32(&psc->rfstat) & PSC_FIFO_EMPTY) - ; - - return in_8(&psc->rfdata_8); -} - -int serial_tstc (void) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - volatile psc512x_t *psc = (psc512x_t *) &im->psc[CONFIG_PSC_CONSOLE]; - - return !(in_be32(&psc->rfstat) & PSC_FIFO_EMPTY); -} - -void serial_setrts(int s) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - volatile psc512x_t *psc = (psc512x_t *) &im->psc[CONFIG_PSC_CONSOLE]; - - if (s) { - /* Assert RTS (become LOW) */ - out_8(&psc->op1, 0x1); - } - else { - /* Negate RTS (become HIGH) */ - out_8(&psc->op0, 0x1); - } -} - -int serial_getcts(void) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - volatile psc512x_t *psc = (psc512x_t *) &im->psc[CONFIG_PSC_CONSOLE]; - - return (in_8(&psc->ip) & 0x1) ? 0 : 1; -} -#endif /* CONFIG_PSC_CONSOLE */ |