/* * (C) Copyright 2000-2006 * 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 */ /*------------------------------------------------------------------------------+ */ /* * This source code has been made available to you by IBM on an AS-IS * basis. Anyone receiving this source is licensed under IBM * copyrights to use it in any way he or she deems fit, including * copying it, modifying it, compiling it, and redistributing it either * with or without modifications. No license under IBM patents or * patent applications is to be implied by the copyright license. * * Any user of this software should understand that IBM cannot provide * technical support for this software and will not be responsible for * any consequences resulting from the use of this software. * * Any person who transfers this source code or any derivative work * must include the IBM copyright notice, this paragraph, and the * preceding two paragraphs in the transferred software. * * COPYRIGHT I B M CORPORATION 1995 * LICENSED MATERIAL - PROGRAM PROPERTY OF I B M */ /*------------------------------------------------------------------------------- */ /* * Travis Sawyer 15 September 2004 * Added CONFIG_SERIAL_MULTI support */ #include <common.h> #include <commproc.h> #include <asm/processor.h> #include <watchdog.h> #include "vecnum.h" #ifdef CONFIG_SERIAL_MULTI #include <serial.h> #endif #ifdef CONFIG_SERIAL_SOFTWARE_FIFO #include <malloc.h> #endif DECLARE_GLOBAL_DATA_PTR; /*****************************************************************************/ #ifdef CONFIG_IOP480 #define SPU_BASE 0x40000000 #define spu_LineStat_rc 0x00 /* Line Status Register (Read/Clear) */ #define spu_LineStat_w 0x04 /* Line Status Register (Set) */ #define spu_Handshk_rc 0x08 /* Handshake Status Register (Read/Clear) */ #define spu_Handshk_w 0x0c /* Handshake Status Register (Set) */ #define spu_BRateDivh 0x10 /* Baud rate divisor high */ #define spu_BRateDivl 0x14 /* Baud rate divisor low */ #define spu_CtlReg 0x18 /* Control Register */ #define spu_RxCmd 0x1c /* Rx Command Register */ #define spu_TxCmd 0x20 /* Tx Command Register */ #define spu_RxBuff 0x24 /* Rx data buffer */ #define spu_TxBuff 0x24 /* Tx data buffer */ /*-----------------------------------------------------------------------------+ | Line Status Register. +-----------------------------------------------------------------------------*/ #define asyncLSRport1 0x40000000 #define asyncLSRport1set 0x40000004 #define asyncLSRDataReady 0x80 #define asyncLSRFramingError 0x40 #define asyncLSROverrunError 0x20 #define asyncLSRParityError 0x10 #define asyncLSRBreakInterrupt 0x08 #define asyncLSRTxHoldEmpty 0x04 #define asyncLSRTxShiftEmpty 0x02 /*-----------------------------------------------------------------------------+ | Handshake Status Register. +-----------------------------------------------------------------------------*/ #define asyncHSRport1 0x40000008 #define asyncHSRport1set 0x4000000c #define asyncHSRDsr 0x80 #define asyncLSRCts 0x40 /*-----------------------------------------------------------------------------+ | Control Register. +-----------------------------------------------------------------------------*/ #define asyncCRport1 0x40000018 #define asyncCRNormal 0x00 #define asyncCRLoopback 0x40 #define asyncCRAutoEcho 0x80 #define asyncCRDtr 0x20 #define asyncCRRts 0x10 #define asyncCRWordLength7 0x00 #define asyncCRWordLength8 0x08 #define asyncCRParityDisable 0x00 #define asyncCRParityEnable 0x04 #define asyncCREvenParity 0x00 #define asyncCROddParity 0x02 #define asyncCRStopBitsOne 0x00 #define asyncCRStopBitsTwo 0x01 #define asyncCRDisableDtrRts 0x00 /*-----------------------------------------------------------------------------+ | Receiver Command Register. +-----------------------------------------------------------------------------*/ #define asyncRCRport1 0x4000001c #define asyncRCRDisable 0x00 #define asyncRCREnable 0x80 #define asyncRCRIntDisable 0x00 #define asyncRCRIntEnabled 0x20 #define asyncRCRDMACh2 0x40 #define asyncRCRDMACh3 0x60 #define asyncRCRErrorInt 0x10 #define asyncRCRPauseEnable 0x08 /*-----------------------------------------------------------------------------+ | Transmitter Command Register. +-----------------------------------------------------------------------------*/ #define asyncTCRport1 0x40000020 #define asyncTCRDisable 0x00 #define asyncTCREnable 0x80 #define asyncTCRIntDisable 0x00 #define asyncTCRIntEnabled 0x20 #define asyncTCRDMACh2 0x40 #define asyncTCRDMACh3 0x60 #define asyncTCRTxEmpty 0x10 #define asyncTCRErrorInt 0x08 #define asyncTCRStopPause 0x04 #define asyncTCRBreakGen 0x02 /*-----------------------------------------------------------------------------+ | Miscellanies defines. +-----------------------------------------------------------------------------*/ #define asyncTxBufferport1 0x40000024 #define asyncRxBufferport1 0x40000024 #define asyncDLABLsbport1 0x40000014 #define asyncDLABMsbport1 0x40000010 #define asyncXOFFchar 0x13 #define asyncXONchar 0x11 /* * Minimal serial functions needed to use one of the SMC ports * as serial console interface. */ int serial_init (void) { volatile char val; unsigned short br_reg; br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1); /* * Init onboard UART */ out8 (SPU_BASE + spu_LineStat_rc, 0x78); /* Clear all bits in Line Status Reg */ out8 (SPU_BASE + spu_BRateDivl, (br_reg & 0x00ff)); /* Set baud rate divisor... */ out8 (SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */ out8 (SPU_BASE + spu_CtlReg, 0x08); /* Set 8 bits, no parity and 1 stop bit */ out8 (SPU_BASE + spu_RxCmd, 0xb0); /* Enable Rx */ out8 (SPU_BASE + spu_TxCmd, 0x9c); /* Enable Tx */ out8 (SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */ val = in8 (SPU_BASE + spu_RxBuff); /* Dummy read, to clear receiver */ return (0); } void serial_setbrg (void) { unsigned short br_reg; br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1); out8 (SPU_BASE + spu_BRateDivl, (br_reg & 0x00ff)); /* Set baud rate divisor... */ out8 (SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */ } void serial_putc (const char c) { if (c == '\n') serial_putc ('\r'); /* load status from handshake register */ if (in8 (SPU_BASE + spu_Handshk_rc) != 00) out8 (SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */ out8 (SPU_BASE + spu_TxBuff, c); /* Put char */ while ((in8 (SPU_BASE + spu_LineStat_rc) & 04) != 04) { if (in8 (SPU_BASE + spu_Handshk_rc) != 00) out8 (SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */ } } void serial_puts (const char *s) { while (*s) { serial_putc (*s++); } } int serial_getc () { unsigned char status = 0; while (1) { status = in8 (asyncLSRport1); if ((status & asyncLSRDataReady) != 0x0) { break; } if ((status & ( asyncLSRFramingError | asyncLSROverrunError | asyncLSRParityError | asyncLSRBreakInterrupt )) != 0) { (void) out8 (asyncLSRport1, asyncLSRFramingError | asyncLSROverrunError | asyncLSRParityError | asyncLSRBreakInterrupt ); } } return (0x000000ff & (int) in8 (asyncRxBufferport1)); } int serial_tstc () { unsigned char status; status = in8 (asyncLSRport1); if ((status & asyncLSRDataReady) != 0x0) { return (1); } if ((status & ( asyncLSRFramingError | asyncLSROverrunError | asyncLSRParityError | asyncLSRBreakInterrupt )) != 0) { (void) out8 (asyncLSRport1, asyncLSRFramingError | asyncLSROverrunError | asyncLSRParityError | asyncLSRBreakInterrupt); } return 0; } #endif /* CONFIG_IOP480 */ /*****************************************************************************/ #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \ defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \ defined(CONFIG_440) #if defined(CONFIG_440) #if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \ defined(CONFIG_440EPX) || defined(CONFIG_440GRX) #define UART0_BASE CFG_PERIPHERAL_BASE + 0x00000300 #define UART1_BASE CFG_PERIPHERAL_BASE + 0x00000400 #else #define UART0_BASE CFG_PERIPHERAL_BASE + 0x00000200 #define UART1_BASE CFG_PERIPHERAL_BASE + 0x00000300 #endif #if defined(CONFIG_440SP) || defined(CONFIG_440SPE) #define UART2_BASE CFG_PERIPHERAL_BASE + 0x00000600 #endif #if defined(CONFIG_440GP) #define CR0_MASK 0x3fff0000 #define CR0_EXTCLK_ENA 0x00600000 #define CR0_UDIV_POS 16 #define UDIV_SUBTRACT 1 #define UART0_SDR cntrl0 #define MFREG(a, d) d = mfdcr(a) #define MTREG(a, d) mtdcr(a, d) #else /* #if defined(CONFIG_440GP) */ /* all other 440 PPC's access clock divider via sdr register */ #define CR0_MASK 0xdfffffff #define CR0_EXTCLK_ENA 0x00800000 #define CR0_UDIV_POS 0 #define UDIV_SUBTRACT 0 #define UART0_SDR sdr_uart0 #define UART1_SDR sdr_uart1 #if defined(CONFIG_440EP) || defined(CONFIG_440EPx) || \ defined(CONFIG_440GR) || defined(CONFIG_440GRx) || \ defined(CONFIG_440SP) || defined(CONFIG_440SPe) #define UART2_SDR sdr_uart2 #endif #if defined(CONFIG_440EP) || defined(CONFIG_440EPx) || \ defined(CONFIG_440GR) || defined(CONFIG_440GRx) #define UART3_SDR sdr_uart3 #endif #define MFREG(a, d) mfsdr(a, d) #define MTREG(a, d) mtsdr(a, d) #endif /* #if defined(CONFIG_440GP) */ #elif defined(CONFIG_405EP) || defined(CONFIG_405EZ) #define UART0_BASE 0xef600300 #define UART1_BASE 0xef600400 #define UCR0_MASK 0x0000007f #define UCR1_MASK 0x00007f00 #define UCR0_UDIV_POS 0 #define UCR1_UDIV_POS 8 #define UDIV_MAX 127 #else /* CONFIG_405GP || CONFIG_405CR */ #define UART0_BASE 0xef600300 #define UART1_BASE 0xef600400 #define CR0_MASK 0x00001fff #define CR0_EXTCLK_ENA 0x000000c0 #define CR0_UDIV_POS 1 #define UDIV_MAX 32 #endif /* using serial port 0 or 1 as U-Boot console ? */ #if defined(CONFIG_UART1_CONSOLE) #define ACTING_UART0_BASE UART1_BASE #define ACTING_UART1_BASE UART0_BASE #else #define ACTING_UART0_BASE UART0_BASE #define ACTING_UART1_BASE UART1_BASE #endif #if defined(CONFIG_SERIAL_MULTI) #define UART_BASE dev_base #else #define UART_BASE ACTING_UART0_BASE #endif #if defined(CONFIG_405EP) && defined(CFG_EXT_SERIAL_CLOCK) #error "External serial clock not supported on AMCC PPC405EP!" #endif #define UART_RBR 0x00 #define UART_THR 0x00 #define UART_IER 0x01 #define UART_IIR 0x02 #define UART_FCR 0x02 #define UART_LCR 0x03 #define UART_MCR 0x04 #define UART_LSR 0x05 #define UART_MSR 0x06 #define UART_SCR 0x07 #define UART_DLL 0x00 #define UART_DLM 0x01 /*-----------------------------------------------------------------------------+ | Line Status Register. +-----------------------------------------------------------------------------*/ /*#define asyncLSRport1 ACTING_UART0_BASE+0x05 */ #define asyncLSRDataReady1 0x01 #define asyncLSROverrunError1 0x02 #define asyncLSRParityError1 0x04 #define asyncLSRFramingError1 0x08 #define asyncLSRBreakInterrupt1 0x10 #define asyncLSRTxHoldEmpty1 0x20 #define asyncLSRTxShiftEmpty1 0x40 #define asyncLSRRxFifoError1 0x80 /*-----------------------------------------------------------------------------+ | Miscellanies defines. +-----------------------------------------------------------------------------*/ /*#define asyncTxBufferport1 ACTING_UART0_BASE+0x00 */ /*#define asyncRxBufferport1 ACTING_UART0_BASE+0x00 */ #ifdef CONFIG_SERIAL_SOFTWARE_FIFO /*-----------------------------------------------------------------------------+ | Fifo +-----------------------------------------------------------------------------*/ typedef struct { char *rx_buffer; ulong rx_put; ulong rx_get; } serial_buffer_t; volatile static serial_buffer_t buf_info; #endif #if defined(CONFIG_440) && !defined(CFG_EXT_SERIAL_CLOCK) static void serial_divs (int baudrate, unsigned long *pudiv, unsigned short *pbdiv) { sys_info_t sysinfo; unsigned long div; /* total divisor udiv * bdiv */ unsigned long umin; /* minimum udiv */ unsigned short diff; /* smallest diff */ unsigned long udiv; /* best udiv */ unsigned short idiff; /* current diff */ unsigned short ibdiv; /* current bdiv */ unsigned long i; unsigned long est; /* current estimate */ get_sys_info(&sysinfo); udiv = 32; /* Assume lowest possible serial clk */ div = sysinfo.freqPLB / (16 * baudrate); /* total divisor */ umin = sysinfo.pllOpbDiv << 1; /* 2 x OPB divisor */ diff = 32; /* highest possible */ /* i is the test udiv value -- start with the largest * possible (32) to minimize serial clock and constrain * search to umin. */ for (i = 32; i > umin; i--) { ibdiv = div / i; est = i * ibdiv; idiff = (est > div) ? (est-div) : (div-est); if (idiff == 0) { udiv = i; break; /* can't do better */ } else if (idiff < diff) { udiv = i; /* best so far */ diff = idiff; /* update lowest diff*/ } } *pudiv = udiv; *pbdiv = div / udiv; } #elif defined(CONFIG_405EZ) static void serial_divs (int baudrate, unsigned long *pudiv, unsigned short *pbdiv) { sys_info_t sysinfo; unsigned long div; /* total divisor udiv * bdiv */ unsigned long umin; /* minimum udiv */ unsigned short diff; /* smallest diff */ unsigned long udiv; /* best udiv */ unsigned short idiff; /* current diff */ unsigned short ibdiv; /* current bdiv */ unsigned long i; unsigned long est; /* current estimate */ unsigned long plloutb; u32 reg; get_sys_info(&sysinfo); plloutb = ((CONFIG_SYS_CLK_FREQ * sysinfo.pllFwdDiv * sysinfo.pllFbkDiv) / sysinfo.pllFwdDivB); udiv = 256; /* Assume lowest possible serial clk */ div = plloutb / (16 * baudrate); /* total divisor */ umin = (plloutb / get_OPB_freq()) << 1; /* 2 x OPB divisor */ diff = 256; /* highest possible */ /* i is the test udiv value -- start with the largest * possible (256) to minimize serial clock and constrain * search to umin. */ for (i = 256; i > umin; i--) { ibdiv = div / i; est = i * ibdiv; idiff = (est > div) ? (est-div) : (div-est); if (idiff == 0) { udiv = i; break; /* can't do better */ } else if (idiff < diff) { udiv = i; /* best so far */ diff = idiff; /* update lowest diff*/ } } *pudiv = udiv; mfcpr(cprperd0, reg); reg &= ~0x0000ffff; reg |= ((udiv - 0) << 8) | (udiv - 0); mtcpr(cprperd0, reg); *pbdiv = div / udiv; } #endif /* defined(CONFIG_440) && !defined(CFG_EXT_SERIAL_CLK) */ /* * Minimal serial functions needed to use one of the SMC ports * as serial console interface. */ #if defined(CONFIG_440) #if defined(CONFIG_SERIAL_MULTI) int serial_init_dev (unsigned long dev_base) #else int serial_init(void) #endif { unsigned long reg; unsigned long udiv; unsigned short bdiv; volatile char val; #ifdef CFG_EXT_SERIAL_CLOCK unsigned long tmp; #endif MFREG(UART0_SDR, reg); reg &= ~CR0_MASK; #ifdef CFG_EXT_SERIAL_CLOCK reg |= CR0_EXTCLK_ENA; udiv = 1; tmp = gd->baudrate * 16; bdiv = (CFG_EXT_SERIAL_CLOCK + tmp / 2) / tmp; #else /* For 440, the cpu clock is on divider chain A, UART on divider * chain B ... so cpu clock is irrelevant. Get the "optimized" * values that are subject to the 1/2 opb clock constraint */ serial_divs (gd->baudrate, &udiv, &bdiv); #endif reg |= (udiv - UDIV_SUBTRACT) << CR0_UDIV_POS; /* set the UART divisor */ /* * Configure input clock to baudrate generator for all * available serial ports here */ MTREG(UART0_SDR, reg); #if defined(UART1_SDR) MTREG(UART1_SDR, reg); #endif #if defined(UART2_SDR) MTREG(UART2_SDR, reg); #endif #if defined(UART3_SDR) MTREG(UART3_SDR, reg); #endif out8(UART_BASE + UART_LCR, 0x80); /* set DLAB bit */ out8(UART_BASE + UART_DLL, bdiv); /* set baudrate divisor */ out8(UART_BASE + UART_DLM, bdiv >> 8); /* set baudrate divisor */ out8(UART_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ out8(UART_BASE + UART_FCR, 0x00); /* disable FIFO */ out8(UART_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ val = in8(UART_BASE + UART_LSR); /* clear line status */ val = in8(UART_BASE + UART_RBR); /* read receive buffer */ out8(UART_BASE + UART_SCR, 0x00); /* set scratchpad */ out8(UART_BASE + UART_IER, 0x00); /* set interrupt enable reg */ return (0); } #else /* !defined(CONFIG_440) */ #if defined(CONFIG_SERIAL_MULTI) int serial_init_dev (unsigned long dev_base) #else int serial_init (void) #endif { unsigned long reg; unsigned long tmp; unsigned long clk; unsigned long udiv; unsigned short bdiv; volatile char val; #if defined(CONFIG_405EZ) serial_divs(gd->baudrate, &udiv, &bdiv); clk = tmp = reg = 0; #else #ifdef CONFIG_405EP reg = mfdcr(cpc0_ucr) & ~(UCR0_MASK | UCR1_MASK); clk = gd->cpu_clk; tmp = CFG_BASE_BAUD * 16; udiv = (clk + tmp / 2) / tmp; if (udiv > UDIV_MAX) /* max. n bits for udiv */ udiv = UDIV_MAX; reg |= (udiv) << UCR0_UDIV_POS; /* set the UART divisor */ reg |= (udiv) << UCR1_UDIV_POS; /* set the UART divisor */ mtdcr (cpc0_ucr, reg); #else /* CONFIG_405EP */ reg = mfdcr(cntrl0) & ~CR0_MASK; #ifdef CFG_EXT_SERIAL_CLOCK clk = CFG_EXT_SERIAL_CLOCK; udiv = 1; reg |= CR0_EXTCLK_ENA; #else clk = gd->cpu_clk; #ifdef CFG_405_UART_ERRATA_59 udiv = 31; /* Errata 59: stuck at 31 */ #else tmp = CFG_BASE_BAUD * 16; udiv = (clk + tmp / 2) / tmp; if (udiv > UDIV_MAX) /* max. n bits for udiv */ udiv = UDIV_MAX; #endif #endif reg |= (udiv - 1) << CR0_UDIV_POS; /* set the UART divisor */ mtdcr (cntrl0, reg); #endif /* CONFIG_405EP */ tmp = gd->baudrate * udiv * 16; bdiv = (clk + tmp / 2) / tmp; #endif /* CONFIG_405EZ */ out8(UART_BASE + UART_LCR, 0x80); /* set DLAB bit */ out8(UART_BASE + UART_DLL, bdiv); /* set baudrate divisor */ out8(UART_BASE + UART_DLM, bdiv >> 8); /* set baudrate divisor */ out8(UART_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ out8(UART_BASE + UART_FCR, 0x00); /* disable FIFO */ out8(UART_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ val = in8(UART_BASE + UART_LSR); /* clear line status */ val = in8(UART_BASE + UART_RBR); /* read receive buffer */ out8(UART_BASE + UART_SCR, 0x00); /* set scratchpad */ out8(UART_BASE + UART_IER, 0x00); /* set interrupt enable reg */ return (0); } #endif /* if defined(CONFIG_440) */ #if defined(CONFIG_SERIAL_MULTI) void serial_setbrg_dev (unsigned long dev_base) #else void serial_setbrg (void) #endif { #if defined(CONFIG_SERIAL_MULTI) serial_init_dev(dev_base); #else serial_init(); #endif } #if defined(CONFIG_SERIAL_MULTI) void serial_putc_dev (unsigned long dev_base, const char c) #else void serial_putc (const char c) #endif { int i; if (c == '\n') #if defined(CONFIG_SERIAL_MULTI) serial_putc_dev (dev_base, '\r'); #else serial_putc ('\r'); #endif /* check THRE bit, wait for transmiter available */ for (i = 1; i < 3500; i++) { if ((in8 (UART_BASE + UART_LSR) & 0x20) == 0x20) break; udelay (100); } out8 (UART_BASE + UART_THR, c); /* put character out */ } #if defined(CONFIG_SERIAL_MULTI) void serial_puts_dev (unsigned long dev_base, const char *s) #else void serial_puts (const char *s) #endif { while (*s) { #if defined(CONFIG_SERIAL_MULTI) serial_putc_dev (dev_base, *s++); #else serial_putc (*s++); #endif } } #if defined(CONFIG_SERIAL_MULTI) int serial_getc_dev (unsigned long dev_base) #else int serial_getc (void) #endif { unsigned char status = 0; while (1) { #if defined(CONFIG_HW_WATCHDOG) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ #endif /* CONFIG_HW_WATCHDOG */ status = in8 (UART_BASE + UART_LSR); if ((status & asyncLSRDataReady1) != 0x0) { break; } if ((status & ( asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1 )) != 0) { out8 (UART_BASE + UART_LSR, asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1); } } return (0x000000ff & (int) in8 (UART_BASE)); } #if defined(CONFIG_SERIAL_MULTI) int serial_tstc_dev (unsigned long dev_base) #else int serial_tstc (void) #endif { unsigned char status; status = in8 (UART_BASE + UART_LSR); if ((status & asyncLSRDataReady1) != 0x0) { return (1); } if ((status & ( asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1 )) != 0) { out8 (UART_BASE + UART_LSR, asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1); } return 0; } #ifdef CONFIG_SERIAL_SOFTWARE_FIFO void serial_isr (void *arg) { int space; int c; const int rx_get = buf_info.rx_get; int rx_put = buf_info.rx_put; if (rx_get <= rx_put) { space = CONFIG_SERIAL_SOFTWARE_FIFO - (rx_put - rx_get); } else { space = rx_get - rx_put; } while (serial_tstc_dev (ACTING_UART0_BASE)) { c = serial_getc_dev (ACTING_UART0_BASE); if (space) { buf_info.rx_buffer[rx_put++] = c; space--; } if (rx_put == CONFIG_SERIAL_SOFTWARE_FIFO) rx_put = 0; if (space < CONFIG_SERIAL_SOFTWARE_FIFO / 4) { /* Stop flow by setting RTS inactive */ out8 (ACTING_UART0_BASE + UART_MCR, in8 (ACTING_UART0_BASE + UART_MCR) & (0xFF ^ 0x02)); } } buf_info.rx_put = rx_put; } void serial_buffered_init (void) { serial_puts ("Switching to interrupt driven serial input mode.\n"); buf_info.rx_buffer = malloc (CONFIG_SERIAL_SOFTWARE_FIFO); buf_info.rx_put = 0; buf_info.rx_get = 0; if (in8 (ACTING_UART0_BASE + UART_MSR) & 0x10) { serial_puts ("Check CTS signal present on serial port: OK.\n"); } else { serial_puts ("WARNING: CTS signal not present on serial port.\n"); } irq_install_handler ( VECNUM_U0 /*UART0 */ /*int vec */ , serial_isr /*interrupt_handler_t *handler */ , (void *) &buf_info /*void *arg */ ); /* Enable "RX Data Available" Interrupt on UART */ /* out8(ACTING_UART0_BASE + UART_IER, in8(ACTING_UART0_BASE + UART_IER) |0x01); */ out8 (ACTING_UART0_BASE + UART_IER, 0x01); /* Set DTR active */ out8 (ACTING_UART0_BASE + UART_MCR, in8 (ACTING_UART0_BASE + UART_MCR) | 0x01); /* Start flow by setting RTS active */ out8 (ACTING_UART0_BASE + UART_MCR, in8 (ACTING_UART0_BASE + UART_MCR) | 0x02); /* Setup UART FIFO: RX trigger level: 4 byte, Enable FIFO */ out8 (ACTING_UART0_BASE + UART_FCR, (1 << 6) | 1); } void serial_buffered_putc (const char c) { /* Wait for CTS */ #if defined(CONFIG_HW_WATCHDOG) while (!(in8 (ACTING_UART0_BASE + UART_MSR) & 0x10)) WATCHDOG_RESET (); #else while (!(in8 (ACTING_UART0_BASE + UART_MSR) & 0x10)); #endif serial_putc (c); } void serial_buffered_puts (const char *s) { serial_puts (s); } int serial_buffered_getc (void) { int space; int c; int rx_get = buf_info.rx_get; int rx_put; #if defined(CONFIG_HW_WATCHDOG) while (rx_get == buf_info.rx_put) WATCHDOG_RESET (); #else while (rx_get == buf_info.rx_put); #endif c = buf_info.rx_buffer[rx_get++]; if (rx_get == CONFIG_SERIAL_SOFTWARE_FIFO) rx_get = 0; buf_info.rx_get = rx_get; rx_put = buf_info.rx_put; if (rx_get <= rx_put) { space = CONFIG_SERIAL_SOFTWARE_FIFO - (rx_put - rx_get); } else { space = rx_get - rx_put; } if (space > CONFIG_SERIAL_SOFTWARE_FIFO / 2) { /* Start flow by setting RTS active */ out8 (ACTING_UART0_BASE + UART_MCR, in8 (ACTING_UART0_BASE + UART_MCR) | 0x02); } return c; } int serial_buffered_tstc (void) { return (buf_info.rx_get != buf_info.rx_put) ? 1 : 0; } #endif /* CONFIG_SERIAL_SOFTWARE_FIFO */ #if defined(CONFIG_CMD_KGDB) /* AS HARNOIS : according to CONFIG_KGDB_SER_INDEX kgdb uses serial port number 0 or number 1 - if CONFIG_KGDB_SER_INDEX = 1 => serial port number 0 : configuration has been already done - if CONFIG_KGDB_SER_INDEX = 2 => serial port number 1 : configure port 1 for serial I/O with rate = CONFIG_KGDB_BAUDRATE */ #if (CONFIG_KGDB_SER_INDEX & 2) void kgdb_serial_init (void) { volatile char val; unsigned short br_reg; get_clocks (); br_reg = (((((gd->cpu_clk / 16) / 18) * 10) / CONFIG_KGDB_BAUDRATE) + 5) / 10; /* * Init onboard 16550 UART */ out8 (ACTING_UART1_BASE + UART_LCR, 0x80); /* set DLAB bit */ out8 (ACTING_UART1_BASE + UART_DLL, (br_reg & 0x00ff)); /* set divisor for 9600 baud */ out8 (ACTING_UART1_BASE + UART_DLM, ((br_reg & 0xff00) >> 8)); /* set divisor for 9600 baud */ out8 (ACTING_UART1_BASE + UART_LCR, 0x03); /* line control 8 bits no parity */ out8 (ACTING_UART1_BASE + UART_FCR, 0x00); /* disable FIFO */ out8 (ACTING_UART1_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ val = in8 (ACTING_UART1_BASE + UART_LSR); /* clear line status */ val = in8 (ACTING_UART1_BASE + UART_RBR); /* read receive buffer */ out8 (ACTING_UART1_BASE + UART_SCR, 0x00); /* set scratchpad */ out8 (ACTING_UART1_BASE + UART_IER, 0x00); /* set interrupt enable reg */ } void putDebugChar (const char c) { if (c == '\n') serial_putc ('\r'); out8 (ACTING_UART1_BASE + UART_THR, c); /* put character out */ /* check THRE bit, wait for transfer done */ while ((in8 (ACTING_UART1_BASE + UART_LSR) & 0x20) != 0x20); } void putDebugStr (const char *s) { while (*s) { serial_putc (*s++); } } int getDebugChar (void) { unsigned char status = 0; while (1) { status = in8 (ACTING_UART1_BASE + UART_LSR); if ((status & asyncLSRDataReady1) != 0x0) { break; } if ((status & ( asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1 )) != 0) { out8 (ACTING_UART1_BASE + UART_LSR, asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1); } } return (0x000000ff & (int) in8 (ACTING_UART1_BASE)); } void kgdb_interruptible (int yes) { return; } #else /* ! (CONFIG_KGDB_SER_INDEX & 2) */ void kgdb_serial_init (void) { serial_printf ("[on serial] "); } void putDebugChar (int c) { serial_putc (c); } void putDebugStr (const char *str) { serial_puts (str); } int getDebugChar (void) { return serial_getc (); } void kgdb_interruptible (int yes) { return; } #endif /* (CONFIG_KGDB_SER_INDEX & 2) */ #endif #if defined(CONFIG_SERIAL_MULTI) int serial0_init(void) { return (serial_init_dev(UART0_BASE)); } int serial1_init(void) { return (serial_init_dev(UART1_BASE)); } void serial0_setbrg (void) { serial_setbrg_dev(UART0_BASE); } void serial1_setbrg (void) { serial_setbrg_dev(UART1_BASE); } void serial0_putc(const char c) { serial_putc_dev(UART0_BASE,c); } void serial1_putc(const char c) { serial_putc_dev(UART1_BASE, c); } void serial0_puts(const char *s) { serial_puts_dev(UART0_BASE, s); } void serial1_puts(const char *s) { serial_puts_dev(UART1_BASE, s); } int serial0_getc(void) { return(serial_getc_dev(UART0_BASE)); } int serial1_getc(void) { return(serial_getc_dev(UART1_BASE)); } int serial0_tstc(void) { return (serial_tstc_dev(UART0_BASE)); } int serial1_tstc(void) { return (serial_tstc_dev(UART1_BASE)); } struct serial_device serial0_device = { "serial0", "UART0", serial0_init, serial0_setbrg, serial0_getc, serial0_tstc, serial0_putc, serial0_puts, }; struct serial_device serial1_device = { "serial1", "UART1", serial1_init, serial1_setbrg, serial1_getc, serial1_tstc, serial1_putc, serial1_puts, }; #endif /* CONFIG_SERIAL_MULTI */ #endif /* CONFIG_405GP || CONFIG_405CR */