| /* |
| * Copyright (C) 2011 by Vladimir Zapolskiy <vz@mleia.com> |
| * |
| * 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., 51 Franklin Street, Fifth Floor, Boston, |
| * MA 02110-1301, USA. |
| */ |
| |
| #include <common.h> |
| #include <asm/arch/cpu.h> |
| #include <asm/arch/clk.h> |
| #include <asm/arch/uart.h> |
| #include <asm/io.h> |
| |
| static struct clk_pm_regs *clk = (struct clk_pm_regs *)CLK_PM_BASE; |
| static struct uart_ctrl_regs *ctrl = (struct uart_ctrl_regs *)UART_CTRL_BASE; |
| |
| void lpc32xx_uart_init(unsigned int uart_id) |
| { |
| if (uart_id < 1 || uart_id > 7) |
| return; |
| |
| /* Disable loopback mode, if it is set by S1L bootloader */ |
| clrbits_le32(&ctrl->loop, |
| UART_LOOPBACK(CONFIG_SYS_LPC32XX_UART)); |
| |
| if (uart_id < 3 || uart_id > 6) |
| return; |
| |
| /* Enable UART system clock */ |
| setbits_le32(&clk->uartclk_ctrl, CLK_UART(uart_id)); |
| |
| /* Set UART into autoclock mode */ |
| clrsetbits_le32(&ctrl->clkmode, |
| UART_CLKMODE_MASK(uart_id), |
| UART_CLKMODE_AUTO(uart_id)); |
| |
| /* Bypass pre-divider of UART clock */ |
| writel(CLK_UART_X_DIV(1) | CLK_UART_Y_DIV(1), |
| &clk->u3clk + (uart_id - 3)); |
| } |
