diff options
Diffstat (limited to 'package/boot/uboot-ar71xx/src/cpu/mips/ar71xx_serial.c')
| -rw-r--r-- | package/boot/uboot-ar71xx/src/cpu/mips/ar71xx_serial.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/package/boot/uboot-ar71xx/src/cpu/mips/ar71xx_serial.c b/package/boot/uboot-ar71xx/src/cpu/mips/ar71xx_serial.c deleted file mode 100644 index f093318952..0000000000 --- a/package/boot/uboot-ar71xx/src/cpu/mips/ar71xx_serial.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * (C) Copyright 2010 - * Michael Kurz <michi.kurz@googlemail.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 <asm/addrspace.h> -#include <asm/types.h> -#include <config.h> -#include <asm/ar71xx.h> - -#define REG_SIZE 4 - -/* === END OF CONFIG === */ - -/* register offset */ -#define OFS_RCV_BUFFER (0*REG_SIZE) -#define OFS_TRANS_HOLD (0*REG_SIZE) -#define OFS_SEND_BUFFER (0*REG_SIZE) -#define OFS_INTR_ENABLE (1*REG_SIZE) -#define OFS_INTR_ID (2*REG_SIZE) -#define OFS_DATA_FORMAT (3*REG_SIZE) -#define OFS_LINE_CONTROL (3*REG_SIZE) -#define OFS_MODEM_CONTROL (4*REG_SIZE) -#define OFS_RS232_OUTPUT (4*REG_SIZE) -#define OFS_LINE_STATUS (5*REG_SIZE) -#define OFS_MODEM_STATUS (6*REG_SIZE) -#define OFS_RS232_INPUT (6*REG_SIZE) -#define OFS_SCRATCH_PAD (7*REG_SIZE) - -#define OFS_DIVISOR_LSB (0*REG_SIZE) -#define OFS_DIVISOR_MSB (1*REG_SIZE) - -#define UART16550_READ(y) readl(KSEG1ADDR(AR71XX_UART_BASE+y)) -#define UART16550_WRITE(x, z) writel(z, KSEG1ADDR((AR71XX_UART_BASE+x))) - -void -ar71xx_sys_frequency(u32 *cpu_freq, u32 *ddr_freq, u32 *ahb_freq) -{ -#ifndef CONFIG_AR91XX - u32 pll, pll_div, cpu_div, ahb_div, ddr_div, freq; - - pll = readl(KSEG1ADDR(AR71XX_PLL_REG_CPU_CONFIG + AR71XX_PLL_BASE)); - - pll_div = - ((pll & AR71XX_PLL_DIV_MASK) >> AR71XX_PLL_DIV_SHIFT) + 1; - - cpu_div = - ((pll & AR71XX_CPU_DIV_MASK) >> AR71XX_CPU_DIV_SHIFT) + 1; - - ddr_div = - ((pll & AR71XX_DDR_DIV_MASK) >> AR71XX_DDR_DIV_SHIFT) + 1; - - ahb_div = - (((pll & AR71XX_AHB_DIV_MASK) >> AR71XX_AHB_DIV_SHIFT) + 1)*2; - - freq = pll_div * 40000000; - - if (cpu_freq) - *cpu_freq = freq/cpu_div; - - if (ddr_freq) - *ddr_freq = freq/ddr_div; - - if (ahb_freq) - *ahb_freq = (freq/cpu_div)/ahb_div; - -#else - u32 pll, pll_div, ahb_div, ddr_div, freq; - - pll = readl(KSEG1ADDR(AR91XX_PLL_REG_CPU_CONFIG + AR71XX_PLL_BASE)); - - pll_div = - ((pll & AR91XX_PLL_DIV_MASK) >> AR91XX_PLL_DIV_SHIFT); - - ddr_div = - ((pll & AR91XX_DDR_DIV_MASK) >> AR91XX_DDR_DIV_SHIFT) + 1; - - ahb_div = - (((pll & AR91XX_AHB_DIV_MASK) >> AR91XX_AHB_DIV_SHIFT) + 1)*2; - - freq = pll_div * 5000000; - - if (cpu_freq) - *cpu_freq = freq; - - if (ddr_freq) - *ddr_freq = freq/ddr_div; - - if (ahb_freq) - *ahb_freq = freq/ahb_div; -#endif -} - - -int serial_init(void) -{ - u32 div; - u32 ahb_freq = 100000000; - - ar71xx_sys_frequency (0, 0, &ahb_freq); - div = ahb_freq/(16 * CONFIG_BAUDRATE); - - // enable uart pins -#ifndef CONFIG_AR91XX - writel(AR71XX_GPIO_FUNC_UART_EN, KSEG1ADDR(AR71XX_GPIO_BASE + GPIO_REG_FUNC)); -#else - writel(AR91XX_GPIO_FUNC_UART_EN, KSEG1ADDR(AR71XX_GPIO_BASE + GPIO_REG_FUNC)); -#endif - - /* set DIAB bit */ - UART16550_WRITE(OFS_LINE_CONTROL, 0x80); - - /* set divisor */ - UART16550_WRITE(OFS_DIVISOR_LSB, (div & 0xff)); - UART16550_WRITE(OFS_DIVISOR_MSB, ((div >> 8) & 0xff)); - - /* clear DIAB bit*/ - UART16550_WRITE(OFS_LINE_CONTROL, 0x00); - - /* set data format */ - UART16550_WRITE(OFS_DATA_FORMAT, 0x3); - - UART16550_WRITE(OFS_INTR_ENABLE, 0); - - return 0; -} - -int serial_tstc (void) -{ - return(UART16550_READ(OFS_LINE_STATUS) & 0x1); -} - -int serial_getc(void) -{ - while(!serial_tstc()); - - return UART16550_READ(OFS_RCV_BUFFER); -} - - -void serial_putc(const char byte) -{ - if (byte == '\n') serial_putc ('\r'); - - while (((UART16550_READ(OFS_LINE_STATUS)) & 0x20) == 0x0); - UART16550_WRITE(OFS_SEND_BUFFER, byte); -} - -void serial_setbrg (void) -{ -} - -void serial_puts (const char *s) -{ - while (*s) - { - serial_putc (*s++); - } -} |