+++ /dev/null
-/*
- * (INCA) ASC UART support
- */
-
-#include <config.h>
-
-#if defined(CONFIG_PURPLE) || defined(CONFIG_INCA_IP)
-
-#ifdef CONFIG_PURPLE
-#define serial_init asc_serial_init
-#define serial_putc asc_serial_putc
-#define serial_puts asc_serial_puts
-#define serial_getc asc_serial_getc
-#define serial_tstc asc_serial_tstc
-#define serial_setbrg asc_serial_setbrg
-#endif
-
-#include <common.h>
-#include <asm/inca-ip.h>
-#include "asc_serial.h"
-
-#ifdef CONFIG_PURPLE
-
-#undef ASC_FIFO_PRESENT
-#define TOUT_LOOP 100000
-
-/* Set base address for second FPI interrupt control register bank */
-#define SFPI_INTCON_BASEADDR 0xBF0F0000
-
-/* Register offset from base address */
-#define FBS_ISR 0x00000000 /* Interrupt status register */
-#define FBS_IMR 0x00000008 /* Interrupt mask register */
-#define FBS_IDIS 0x00000010 /* Interrupt disable register */
-
-/* Interrupt status register bits */
-#define FBS_ISR_AT 0x00000040 /* ASC transmit interrupt */
-#define FBS_ISR_AR 0x00000020 /* ASC receive interrupt */
-#define FBS_ISR_AE 0x00000010 /* ASC error interrupt */
-#define FBS_ISR_AB 0x00000008 /* ASC transmit buffer interrupt */
-#define FBS_ISR_AS 0x00000004 /* ASC start of autobaud detection interrupt */
-#define FBS_ISR_AF 0x00000002 /* ASC end of autobaud detection interrupt */
-
-#else
-
-#define ASC_FIFO_PRESENT
-
-#endif
-
-
-#define SET_BIT(reg, mask) reg |= (mask)
-#define CLEAR_BIT(reg, mask) reg &= (~mask)
-#define CLEAR_BITS(reg, mask) CLEAR_BIT(reg, mask)
-#define SET_BITS(reg, mask) SET_BIT(reg, mask)
-#define SET_BITFIELD(reg, mask, off, val) {reg &= (~mask); reg |= (val << off);}
-
-extern uint incaip_get_fpiclk(void);
-
-static int serial_setopt (void);
-
-/* pointer to ASC register base address */
-static volatile incaAsc_t *pAsc = (incaAsc_t *)INCA_IP_ASC;
-
-/******************************************************************************
-*
-* serial_init - initialize a INCAASC channel
-*
-* This routine initializes the number of data bits, parity
-* and set the selected baud rate. Interrupts are disabled.
-* Set the modem control signals if the option is selected.
-*
-* RETURNS: N/A
-*/
-
-int serial_init (void)
-{
-#ifdef CONFIG_INCA_IP
- /* we have to set PMU.EN13 bit to enable an ASC device*/
- INCAASC_PMU_ENABLE(13);
-#endif
-
- /* and we have to set CLC register*/
- CLEAR_BIT(pAsc->asc_clc, ASCCLC_DISS);
- SET_BITFIELD(pAsc->asc_clc, ASCCLC_RMCMASK, ASCCLC_RMCOFFSET, 0x0001);
-
- /* initialy we are in async mode */
- pAsc->asc_con = ASCCON_M_8ASYNC;
-
- /* select input port */
- pAsc->asc_pisel = (CONSOLE_TTY & 0x1);
-
-#ifdef ASC_FIFO_PRESENT
- /* TXFIFO's filling level */
- SET_BITFIELD(pAsc->asc_txfcon, ASCTXFCON_TXFITLMASK,
- ASCTXFCON_TXFITLOFF, INCAASC_TXFIFO_FL);
- /* enable TXFIFO */
- SET_BIT(pAsc->asc_txfcon, ASCTXFCON_TXFEN);
-
- /* RXFIFO's filling level */
- SET_BITFIELD(pAsc->asc_txfcon, ASCRXFCON_RXFITLMASK,
- ASCRXFCON_RXFITLOFF, INCAASC_RXFIFO_FL);
- /* enable RXFIFO */
- SET_BIT(pAsc->asc_rxfcon, ASCRXFCON_RXFEN);
-#endif
-
- /* enable error signals */
- SET_BIT(pAsc->asc_con, ASCCON_FEN);
- SET_BIT(pAsc->asc_con, ASCCON_OEN);
-
-#ifdef CONFIG_INCA_IP
- /* acknowledge ASC interrupts */
- ASC_INTERRUPTS_CLEAR(INCAASC_IRQ_LINE_ALL);
-
- /* disable ASC interrupts */
- ASC_INTERRUPTS_DISABLE(INCAASC_IRQ_LINE_ALL);
-#endif
-
-#ifdef ASC_FIFO_PRESENT
- /* set FIFOs into the transparent mode */
- SET_BIT(pAsc->asc_txfcon, ASCTXFCON_TXTMEN);
- SET_BIT(pAsc->asc_rxfcon, ASCRXFCON_RXTMEN);
-#endif
-
- /* set baud rate */
- serial_setbrg();
-
- /* set the options */
- serial_setopt();
-
- return 0;
-}
-
-void serial_setbrg (void)
-{
- ulong uiReloadValue, fdv;
- ulong f_ASC;
-
-#ifdef CONFIG_INCA_IP
- f_ASC = incaip_get_fpiclk();
-#else
- f_ASC = ASC_CLOCK_RATE;
-#endif
-
-#ifndef INCAASC_USE_FDV
- fdv = 2;
- uiReloadValue = (f_ASC / (fdv * 16 * CONFIG_BAUDRATE)) - 1;
-#else
- fdv = INCAASC_FDV_HIGH_BAUDRATE;
- uiReloadValue = (f_ASC / (8192 * CONFIG_BAUDRATE / fdv)) - 1;
-#endif /* INCAASC_USE_FDV */
-
- if ( (uiReloadValue < 0) || (uiReloadValue > 8191) )
- {
-#ifndef INCAASC_USE_FDV
- fdv = 3;
- uiReloadValue = (f_ASC / (fdv * 16 * CONFIG_BAUDRATE)) - 1;
-#else
- fdv = INCAASC_FDV_LOW_BAUDRATE;
- uiReloadValue = (f_ASC / (8192 * CONFIG_BAUDRATE / fdv)) - 1;
-#endif /* INCAASC_USE_FDV */
-
- if ( (uiReloadValue < 0) || (uiReloadValue > 8191) )
- {
- return; /* can't impossibly generate that baud rate */
- }
- }
-
- /* Disable Baud Rate Generator; BG should only be written when R=0 */
- CLEAR_BIT(pAsc->asc_con, ASCCON_R);
-
-#ifndef INCAASC_USE_FDV
- /*
- * Disable Fractional Divider (FDE)
- * Divide clock by reload-value + constant (BRS)
- */
- /* FDE = 0 */
- CLEAR_BIT(pAsc->asc_con, ASCCON_FDE);
-
- if ( fdv == 2 )
- CLEAR_BIT(pAsc->asc_con, ASCCON_BRS); /* BRS = 0 */
- else
- SET_BIT(pAsc->asc_con, ASCCON_BRS); /* BRS = 1 */
-
-#else /* INCAASC_USE_FDV */
-
- /* Enable Fractional Divider */
- SET_BIT(pAsc->asc_con, ASCCON_FDE); /* FDE = 1 */
-
- /* Set fractional divider value */
- pAsc->asc_fdv = fdv & ASCFDV_VALUE_MASK;
-
-#endif /* INCAASC_USE_FDV */
-
- /* Set reload value in BG */
- pAsc->asc_bg = uiReloadValue;
-
- /* Enable Baud Rate Generator */
- SET_BIT(pAsc->asc_con, ASCCON_R); /* R = 1 */
-}
-
-/*******************************************************************************
-*
-* serial_setopt - set the serial options
-*
-* Set the channel operating mode to that specified. Following options
-* are supported: CREAD, CSIZE, PARENB, and PARODD.
-*
-* Note, this routine disables the transmitter. The calling routine
-* may have to re-enable it.
-*
-* RETURNS:
-* Returns 0 to indicate success, otherwise -1 is returned
-*/
-
-static int serial_setopt (void)
-{
- ulong con;
-
- switch ( ASC_OPTIONS & ASCOPT_CSIZE )
- {
- /* 7-bit-data */
- case ASCOPT_CS7:
- con = ASCCON_M_7ASYNCPAR; /* 7-bit-data and parity bit */
- break;
-
- /* 8-bit-data */
- case ASCOPT_CS8:
- if ( ASC_OPTIONS & ASCOPT_PARENB )
- con = ASCCON_M_8ASYNCPAR; /* 8-bit-data and parity bit */
- else
- con = ASCCON_M_8ASYNC; /* 8-bit-data no parity */
- break;
-
- /*
- * only 7 and 8-bit frames are supported
- * if we don't use IOCTL extensions
- */
- default:
- return -1;
- }
-
- if ( ASC_OPTIONS & ASCOPT_STOPB )
- SET_BIT(con, ASCCON_STP); /* 2 stop bits */
- else
- CLEAR_BIT(con, ASCCON_STP); /* 1 stop bit */
-
- if ( ASC_OPTIONS & ASCOPT_PARENB )
- SET_BIT(con, ASCCON_PEN); /* enable parity checking */
- else
- CLEAR_BIT(con, ASCCON_PEN); /* disable parity checking */
-
- if ( ASC_OPTIONS & ASCOPT_PARODD )
- SET_BIT(con, ASCCON_ODD); /* odd parity */
- else
- CLEAR_BIT(con, ASCCON_ODD); /* even parity */
-
- if ( ASC_OPTIONS & ASCOPT_CREAD )
- SET_BIT(pAsc->asc_whbcon, ASCWHBCON_SETREN); /* Receiver enable */
-
- pAsc->asc_con |= con;
-
- return 0;
-}
-
-void serial_putc (const char c)
-{
-#ifdef ASC_FIFO_PRESENT
- uint txFl = 0;
-#else
- uint timeout = 0;
-#endif
-
- if (c == '\n') serial_putc ('\r');
-
-#ifdef ASC_FIFO_PRESENT
- /* check do we have a free space in the TX FIFO */
- /* get current filling level */
- do
- {
- txFl = ( pAsc->asc_fstat & ASCFSTAT_TXFFLMASK ) >> ASCFSTAT_TXFFLOFF;
- }
- while ( txFl == INCAASC_TXFIFO_FULL );
-#else
-
- while(!(*(volatile unsigned long*)(SFPI_INTCON_BASEADDR + FBS_ISR) &
- FBS_ISR_AB))
- {
- if (timeout++ > TOUT_LOOP)
- {
- break;
- }
- }
-#endif
-
- pAsc->asc_tbuf = c; /* write char to Transmit Buffer Register */
-
-#ifndef ASC_FIFO_PRESENT
- *(volatile unsigned long*)(SFPI_INTCON_BASEADDR + FBS_ISR) = FBS_ISR_AB |
- FBS_ISR_AT;
-#endif
-
- /* check for errors */
- if ( pAsc->asc_con & ASCCON_OE )
- {
- SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLROE);
- return;
- }
-}
-
-void serial_puts (const char *s)
-{
- while (*s)
- {
- serial_putc (*s++);
- }
-}
-
-int serial_getc (void)
-{
- ulong symbol_mask;
- char c;
-
- while (!serial_tstc());
-
- symbol_mask =
- ((ASC_OPTIONS & ASCOPT_CSIZE) == ASCOPT_CS7) ? (0x7f) : (0xff);
-
- c = (char)(pAsc->asc_rbuf & symbol_mask);
-
-#ifndef ASC_FIFO_PRESENT
- *(volatile unsigned long*)(SFPI_INTCON_BASEADDR + FBS_ISR) = FBS_ISR_AR;
-#endif
-
- return c;
-}
-
-int serial_tstc (void)
-{
- int res = 1;
-
-#ifdef ASC_FIFO_PRESENT
- if ( (pAsc->asc_fstat & ASCFSTAT_RXFFLMASK) == 0 )
- {
- res = 0;
- }
-#else
- if (!(*(volatile unsigned long*)(SFPI_INTCON_BASEADDR + FBS_ISR) &
- FBS_ISR_AR))
-
- {
- res = 0;
- }
-#endif
- else if ( pAsc->asc_con & ASCCON_FE )
- {
- SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLRFE);
- res = 0;
- }
- else if ( pAsc->asc_con & ASCCON_PE )
- {
- SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLRPE);
- res = 0;
- }
- else if ( pAsc->asc_con & ASCCON_OE )
- {
- SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLROE);
- res = 0;
- }
-
- return res;
-}
-#endif /* CONFIG_PURPLE || CONFIG_INCA_IP */
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