| /* |
| * (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> |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| #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) |
| { |
| 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) |
| { |
| 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 */ |