mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-12 14:23:00 +00:00
53677ef18e
This commit gets rid of a huge amount of silly white-space issues. Especially, all sequences of SPACEs followed by TAB characters get removed (unless they appear in print statements). Also remove all embedded "vim:" and "vi:" statements which hide indentation problems. Signed-off-by: Wolfgang Denk <wd@denx.de>
201 lines
4.5 KiB
C
201 lines
4.5 KiB
C
/*
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* (c) 2004 Sascha Hauer <sascha@saschahauer.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#if defined (CONFIG_IMX)
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#include <asm/arch/imx-regs.h>
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#ifndef CONFIG_IMX_SERIAL_NONE
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#if defined CONFIG_IMX_SERIAL1
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#define UART_BASE IMX_UART1_BASE
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#elif defined CONFIG_IMX_SERIAL2
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#define UART_BASE IMX_UART2_BASE
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#else
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#error "define CONFIG_IMX_SERIAL1, CONFIG_IMX_SERIAL2 or CONFIG_IMX_SERIAL_NONE"
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#endif
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struct imx_serial {
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volatile uint32_t urxd[16];
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volatile uint32_t utxd[16];
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volatile uint32_t ucr1;
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volatile uint32_t ucr2;
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volatile uint32_t ucr3;
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volatile uint32_t ucr4;
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volatile uint32_t ufcr;
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volatile uint32_t usr1;
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volatile uint32_t usr2;
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volatile uint32_t uesc;
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volatile uint32_t utim;
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volatile uint32_t ubir;
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volatile uint32_t ubmr;
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volatile uint32_t ubrc;
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volatile uint32_t bipr[4];
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volatile uint32_t bmpr[4];
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volatile uint32_t uts;
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};
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void serial_setbrg (void)
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{
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serial_init();
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}
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extern void imx_gpio_mode(int gpio_mode);
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/*
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* Initialise the serial port with the given baudrate. The settings
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* are always 8 data bits, no parity, 1 stop bit, no start bits.
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*
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*/
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int serial_init (void)
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{
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volatile struct imx_serial* base = (struct imx_serial *)UART_BASE;
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#ifdef CONFIG_IMX_SERIAL1
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imx_gpio_mode(PC11_PF_UART1_TXD);
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imx_gpio_mode(PC12_PF_UART1_RXD);
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#else
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imx_gpio_mode(PB30_PF_UART2_TXD);
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imx_gpio_mode(PB31_PF_UART2_RXD);
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#endif
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/* Disable UART */
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base->ucr1 &= ~UCR1_UARTEN;
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/* Set to default POR state */
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base->ucr1 = 0x00000004;
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base->ucr2 = 0x00000000;
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base->ucr3 = 0x00000000;
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base->ucr4 = 0x00008040;
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base->uesc = 0x0000002B;
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base->utim = 0x00000000;
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base->ubir = 0x00000000;
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base->ubmr = 0x00000000;
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base->uts = 0x00000000;
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/* Set clocks */
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base->ucr4 |= UCR4_REF16;
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/* Configure FIFOs */
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base->ufcr = 0xa81;
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/* Set the numerator value minus one of the BRM ratio */
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base->ubir = (CONFIG_BAUDRATE / 100) - 1;
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/* Set the denominator value minus one of the BRM ratio */
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base->ubmr = 10000 - 1;
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/* Set to 8N1 */
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base->ucr2 &= ~UCR2_PREN;
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base->ucr2 |= UCR2_WS;
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base->ucr2 &= ~UCR2_STPB;
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/* Ignore RTS */
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base->ucr2 |= UCR2_IRTS;
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/* Enable UART */
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base->ucr1 |= UCR1_UARTEN | UCR1_UARTCLKEN;
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/* Enable FIFOs */
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base->ucr2 |= UCR2_SRST | UCR2_RXEN | UCR2_TXEN;
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/* Clear status flags */
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base->usr2 |= USR2_ADET |
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USR2_DTRF |
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USR2_IDLE |
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USR2_IRINT |
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USR2_WAKE |
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USR2_RTSF |
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USR2_BRCD |
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USR2_ORE |
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USR2_RDR;
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/* Clear status flags */
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base->usr1 |= USR1_PARITYERR |
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USR1_RTSD |
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USR1_ESCF |
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USR1_FRAMERR |
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USR1_AIRINT |
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USR1_AWAKE;
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return (0);
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}
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/*
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* Read a single byte from the serial port. Returns 1 on success, 0
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* otherwise. When the function is successful, the character read is
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* written into its argument c.
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*/
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int serial_getc (void)
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{
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volatile struct imx_serial* base = (struct imx_serial *)UART_BASE;
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unsigned char ch;
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while(base->uts & UTS_RXEMPTY);
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ch = (char)base->urxd[0];
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return ch;
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}
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#ifdef CONFIG_HWFLOW
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static int hwflow = 0; /* turned off by default */
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int hwflow_onoff(int on)
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{
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}
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#endif
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/*
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* Output a single byte to the serial port.
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*/
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void serial_putc (const char c)
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{
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volatile struct imx_serial* base = (struct imx_serial *)UART_BASE;
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/* Wait for Tx FIFO not full */
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while (base->uts & UTS_TXFULL);
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base->utxd[0] = c;
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/* If \n, also do \r */
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if (c == '\n')
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serial_putc ('\r');
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}
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/*
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* Test whether a character is in the RX buffer
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*/
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int serial_tstc (void)
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{
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volatile struct imx_serial* base = (struct imx_serial *)UART_BASE;
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/* If receive fifo is empty, return false */
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if (base->uts & UTS_RXEMPTY)
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return 0;
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return 1;
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}
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void
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serial_puts (const char *s)
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{
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while (*s) {
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serial_putc (*s++);
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}
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}
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#endif /* CONFIG_IMX_SERIAL_NONE */
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#endif /* defined CONFIG_IMX */
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