diff options
Diffstat (limited to 'cpu/arm920t/imx/serial.c')
| -rw-r--r-- | cpu/arm920t/imx/serial.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/cpu/arm920t/imx/serial.c b/cpu/arm920t/imx/serial.c deleted file mode 100644 index 85f1167..0000000 --- a/cpu/arm920t/imx/serial.c +++ /dev/null @@ -1,227 +0,0 @@ -/* - * (c) 2004 Sascha Hauer <sascha@saschahauer.de> - * - * 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 <common.h> -#if defined (CONFIG_IMX) - -#include <asm/arch/imx-regs.h> - -#ifndef CONFIG_IMX_SERIAL_NONE - -#if defined CONFIG_IMX_SERIAL1 -#define UART_BASE IMX_UART1_BASE -#elif defined CONFIG_IMX_SERIAL2 -#define UART_BASE IMX_UART2_BASE -#else -#error "define CONFIG_IMX_SERIAL1, CONFIG_IMX_SERIAL2 or CONFIG_IMX_SERIAL_NONE" -#endif - -struct imx_serial { - volatile uint32_t urxd[16]; - volatile uint32_t utxd[16]; - volatile uint32_t ucr1; - volatile uint32_t ucr2; - volatile uint32_t ucr3; - volatile uint32_t ucr4; - volatile uint32_t ufcr; - volatile uint32_t usr1; - volatile uint32_t usr2; - volatile uint32_t uesc; - volatile uint32_t utim; - volatile uint32_t ubir; - volatile uint32_t ubmr; - volatile uint32_t ubrc; - volatile uint32_t bipr[4]; - volatile uint32_t bmpr[4]; - volatile uint32_t uts; -}; - -DECLARE_GLOBAL_DATA_PTR; - -void serial_setbrg (void) -{ - serial_init(); -} - -extern void imx_gpio_mode(int gpio_mode); - -/* - * Initialise the serial port with the given baudrate. The settings - * are always 8 data bits, no parity, 1 stop bit, no start bits. - * - */ -int serial_init (void) -{ - volatile struct imx_serial* base = (struct imx_serial *)UART_BASE; - unsigned int ufcr_rfdiv; - unsigned int refclk; - -#ifdef CONFIG_IMX_SERIAL1 - imx_gpio_mode(PC11_PF_UART1_TXD); - imx_gpio_mode(PC12_PF_UART1_RXD); -#else - imx_gpio_mode(PB30_PF_UART2_TXD); - imx_gpio_mode(PB31_PF_UART2_RXD); -#endif - - /* Disable UART */ - base->ucr1 &= ~UCR1_UARTEN; - - /* Set to default POR state */ - - base->ucr1 = 0x00000004; - base->ucr2 = 0x00000000; - base->ucr3 = 0x00000000; - base->ucr4 = 0x00008040; - base->uesc = 0x0000002B; - base->utim = 0x00000000; - base->ubir = 0x00000000; - base->ubmr = 0x00000000; - base->uts = 0x00000000; - /* Set clocks */ - base->ucr4 |= UCR4_REF16; - - /* Configure FIFOs */ - base->ufcr = 0xa81; - - /* set the baud rate. - * - * baud * 16 x - * --------- = - - * refclk y - * - * x - 1 = UBIR - * y - 1 = UBMR - * - * each register is 16 bits wide. refclk max is 96 MHz - * - */ - - ufcr_rfdiv = ((base->ufcr) & UFCR_RFDIV) >> 7; - if (ufcr_rfdiv == 6) - ufcr_rfdiv = 7; - else - ufcr_rfdiv = 6 - ufcr_rfdiv; - - refclk = get_PERCLK1(); - refclk /= ufcr_rfdiv; - - /* Set the numerator value minus one of the BRM ratio */ - base->ubir = (gd->baudrate / 100) - 1; - - /* Set the denominator value minus one of the BRM ratio */ - base->ubmr = (refclk/(16 * 100)) - 1; - - /* Set to 8N1 */ - base->ucr2 &= ~UCR2_PREN; - base->ucr2 |= UCR2_WS; - base->ucr2 &= ~UCR2_STPB; - - /* Ignore RTS */ - base->ucr2 |= UCR2_IRTS; - - /* Enable UART */ - base->ucr1 |= UCR1_UARTEN | UCR1_UARTCLKEN; - - /* Enable FIFOs */ - base->ucr2 |= UCR2_SRST | UCR2_RXEN | UCR2_TXEN; - - /* Clear status flags */ - base->usr2 |= USR2_ADET | - USR2_DTRF | - USR2_IDLE | - USR2_IRINT | - USR2_WAKE | - USR2_RTSF | - USR2_BRCD | - USR2_ORE; - - /* Clear status flags */ - base->usr1 |= USR1_PARITYERR | - USR1_RTSD | - USR1_ESCF | - USR1_FRAMERR | - USR1_AIRINT | - USR1_AWAKE; - return (0); -} - -/* - * Read a single byte from the serial port. Returns 1 on success, 0 - * otherwise. When the function is successful, the character read is - * written into its argument c. - */ -int serial_getc (void) -{ - volatile struct imx_serial* base = (struct imx_serial *)UART_BASE; - unsigned char ch; - - while(base->uts & UTS_RXEMPTY); - - ch = (char)base->urxd[0]; - - return ch; -} - -#ifdef CONFIG_HWFLOW -static int hwflow = 0; /* turned off by default */ -int hwflow_onoff(int on) -{ -} -#endif - -/* - * Output a single byte to the serial port. - */ -void serial_putc (const char c) -{ - volatile struct imx_serial* base = (struct imx_serial *)UART_BASE; - - /* Wait for Tx FIFO not full */ - while (base->uts & UTS_TXFULL); - - base->utxd[0] = c; - - /* If \n, also do \r */ - if (c == '\n') - serial_putc ('\r'); -} - -/* - * Test whether a character is in the RX buffer - */ -int serial_tstc (void) -{ - volatile struct imx_serial* base = (struct imx_serial *)UART_BASE; - - /* If receive fifo is empty, return false */ - if (base->uts & UTS_RXEMPTY) - return 0; - return 1; -} - -void -serial_puts (const char *s) -{ - while (*s) { - serial_putc (*s++); - } -} -#endif /* CONFIG_IMX_SERIAL_NONE */ -#endif /* defined CONFIG_IMX */ |