diff options
Diffstat (limited to 'package/uboot-lantiq/files/drivers/serial/ifx_asc.c')
| -rw-r--r-- | package/uboot-lantiq/files/drivers/serial/ifx_asc.c | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/package/uboot-lantiq/files/drivers/serial/ifx_asc.c b/package/uboot-lantiq/files/drivers/serial/ifx_asc.c deleted file mode 100644 index 5c13f26..0000000 --- a/package/uboot-lantiq/files/drivers/serial/ifx_asc.c +++ /dev/null @@ -1,218 +0,0 @@ -/* - * (C) Copyright 2003 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * (C) Copyright 2009 - * Infineon Technologies AG, http://www.infineon.com - * - * 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 - */ - -#include <config.h> -#include <common.h> -#include <asm/io.h> -#include <asm/addrspace.h> - -#include "ifx_asc.h" - -#define SET_BIT(reg, mask) asc_writel(reg, asc_readl(reg) | (mask)) -#define CLEAR_BIT(reg, mask) asc_writel(reg, asc_readl(reg) & (~mask)) -#define SET_BITFIELD(reg, mask, off, val) asc_writel(reg, (asc_readl(reg) & (~mask)) | (val << off) ) - -#undef DEBUG_ASC_RAW -#ifdef DEBUG_ASC_RAW -#define DEBUG_ASC_RAW_RX_BUF 0xA0800000 -#define DEBUG_ASC_RAW_TX_BUF 0xA0900000 -#endif - -DECLARE_GLOBAL_DATA_PTR; - -static IfxAsc_t *pAsc = (IfxAsc_t *)CKSEG1ADDR(CONFIG_SYS_IFX_ASC_BASE); - -/* - * FDV fASC - * BaudRate = ----- * -------------------- - * 512 16 * (ReloadValue+1) - */ - -/* - * FDV fASC - * ReloadValue = ( ----- * --------------- ) - 1 - * 512 16 * BaudRate - */ -static void serial_divs(u32 baudrate, u32 fasc, u32 *pfdv, u32 *preload) -{ - u32 clock = fasc / 16; - - u32 fdv; /* best fdv */ - u32 reload = 0; /* best reload */ - u32 diff; /* smallest diff */ - u32 idiff; /* current diff */ - u32 ireload; /* current reload */ - u32 i; /* current fdv */ - u32 result; /* current resulting baudrate */ - - if (clock > 0x7FFFFF) - clock /= 512; - else - baudrate *= 512; - - fdv = 512; /* start with 1:1 fraction */ - diff = baudrate; /* highest possible */ - - /* i is the test fdv value -- start with the largest possible */ - for (i = 512; i > 0; i--) - { - ireload = (clock * i) / baudrate; - if (ireload < 1) - break; /* already invalid */ - result = (clock * i) / ireload; - - idiff = (result > baudrate) ? (result - baudrate) : (baudrate - result); - if (idiff == 0) - { - fdv = i; - reload = ireload; - break; /* can't do better */ - } - else if (idiff < diff) - { - fdv = i; /* best so far */ - reload = ireload; - diff = idiff; /* update lowest diff*/ - } - } - - *pfdv = (fdv == 512) ? 0 : fdv; - *preload = reload - 1; -} - - -void serial_setbrg (void) -{ - u32 ReloadValue, fdv; - - serial_divs(gd->baudrate, get_bus_freq(0), &fdv, &ReloadValue); - - /* Disable Baud Rate Generator; BG should only be written when R=0 */ - CLEAR_BIT(asc_con, ASCCON_R); - - /* Enable Fractional Divider */ - SET_BIT(asc_con, ASCCON_FDE); /* FDE = 1 */ - - /* Set fractional divider value */ - asc_writel(asc_fdv, fdv & ASCFDV_VALUE_MASK); - - /* Set reload value in BG */ - asc_writel(asc_bg, ReloadValue); - - /* Enable Baud Rate Generator */ - SET_BIT(asc_con, ASCCON_R); /* R = 1 */ -} - - -int serial_init (void) -{ - - /* and we have to set CLC register*/ - CLEAR_BIT(asc_clc, ASCCLC_DISS); - SET_BITFIELD(asc_clc, ASCCLC_RMCMASK, ASCCLC_RMCOFFSET, 0x0001); - - /* initialy we are in async mode */ - asc_writel(asc_con, ASCCON_M_8ASYNC); - - /* select input port */ - asc_writel(asc_pisel, CONSOLE_TTY & 0x1); - - /* TXFIFO's filling level */ - SET_BITFIELD(asc_txfcon, ASCTXFCON_TXFITLMASK, - ASCTXFCON_TXFITLOFF, ASC_TXFIFO_FL); - /* enable TXFIFO */ - SET_BIT(asc_txfcon, ASCTXFCON_TXFEN); - - /* RXFIFO's filling level */ - SET_BITFIELD(asc_txfcon, ASCRXFCON_RXFITLMASK, - ASCRXFCON_RXFITLOFF, ASC_RXFIFO_FL); - /* enable RXFIFO */ - SET_BIT(asc_rxfcon, ASCRXFCON_RXFEN); - - /* set baud rate */ - serial_setbrg(); - - /* enable error signals & Receiver enable */ - SET_BIT(asc_whbstate, ASCWHBSTATE_SETREN|ASCCON_FEN|ASCCON_TOEN|ASCCON_ROEN); - - return 0; -} - - -void serial_putc (const char c) -{ - u32 txFl = 0; -#ifdef DEBUG_ASC_RAW - static u8 * debug = (u8 *) DEBUG_ASC_RAW_TX_BUF; - *debug++=c; -#endif - if (c == '\n') - serial_putc ('\r'); - /* check do we have a free space in the TX FIFO */ - /* get current filling level */ - do { - txFl = ( asc_readl(asc_fstat) & ASCFSTAT_TXFFLMASK ) >> ASCFSTAT_TXFFLOFF; - } - while ( txFl == ASC_TXFIFO_FULL ); - - asc_writel(asc_tbuf, c); /* write char to Transmit Buffer Register */ - - /* check for errors */ - if ( asc_readl(asc_state) & ASCSTATE_TOE ) { - SET_BIT(asc_whbstate, ASCWHBSTATE_CLRTOE); - return; - } -} - -void serial_puts (const char *s) -{ - while (*s) { - serial_putc (*s++); - } -} - -int serial_getc (void) -{ - char c; - while ((asc_readl(asc_fstat) & ASCFSTAT_RXFFLMASK) == 0 ); - c = (char)(asc_readl(asc_rbuf) & 0xff); - -#ifdef DEBUG_ASC_RAW - static u8* debug=(u8*)(DEBUG_ASC_RAW_RX_BUF); - *debug++=c; -#endif - return c; -} - - -int serial_tstc (void) -{ - int res = 1; - - if ( (asc_readl(asc_fstat) & ASCFSTAT_RXFFLMASK) == 0 ) { - res = 0; - } - return res; -} |