| 1 | /* |
| 2 | * ADM5120 UART definitions |
| 3 | * |
| 4 | * This header file defines the hardware registers of the ADM5120 SoC |
| 5 | * built-in UARTs. |
| 6 | * |
| 7 | * Copyright (C) 2007 Gabor Juhos <juhosg@openwrt.org> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License version 2 as published |
| 11 | * by the Free Software Foundation. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #ifndef _MACH_ADM5120_UART_H |
| 16 | #define _MACH_ADM5120_UART_H |
| 17 | |
| 18 | #define UART_BAUDDIV(clk, baud) ((clk/(16 * (baud)))-1) |
| 19 | |
| 20 | #define UART_REG_DATA 0x00 |
| 21 | #define UART_REG_RSR 0x04 |
| 22 | #define UART_REG_ECR UART_REG_RSR |
| 23 | #define UART_REG_LCRH 0x08 |
| 24 | #define UART_REG_LCRM 0x0C |
| 25 | #define UART_REG_LCRL 0x10 |
| 26 | #define UART_REG_CTRL 0x14 |
| 27 | #define UART_REG_FLAG 0x18 |
| 28 | |
| 29 | /* Receive Status Register bits */ |
| 30 | #define UART_RSR_FE (1 << 0) |
| 31 | #define UART_RSR_PE (1 << 1) |
| 32 | #define UART_RSR_BE (1 << 2) |
| 33 | #define UART_RSR_OE (1 << 3) |
| 34 | #define UART_RSR_ERR (UART_RSR_FE | UART_RSR_PE | UART_RSR_BE) |
| 35 | |
| 36 | #define UART_ECR_ALL 0xFF |
| 37 | |
| 38 | /* Line Control High register bits */ |
| 39 | #define UART_LCRH_BRK (1 << 0) /* send break */ |
| 40 | #define UART_LCRH_PEN (1 << 1) /* parity enable */ |
| 41 | #define UART_LCRH_EPS (1 << 2) /* even parity select */ |
| 42 | #define UART_LCRH_STP1 (0 << 3) /* one stop bits select */ |
| 43 | #define UART_LCRH_STP2 (1 << 3) /* two stop bits select */ |
| 44 | #define UART_LCRH_FEN (1 << 4) /* FIFO enable */ |
| 45 | |
| 46 | #define UART_LCRH_WLEN5 (0 << 5) |
| 47 | #define UART_LCRH_WLEN6 (1 << 5) |
| 48 | #define UART_LCRH_WLEN7 (2 << 5) |
| 49 | #define UART_LCRH_WLEN8 (3 << 5) |
| 50 | |
| 51 | /* Control register bits */ |
| 52 | #define UART_CTRL_EN (1 << 0) |
| 53 | |
| 54 | /* Flag register bits */ |
| 55 | #define UART_FLAG_CTS (1 << 0) |
| 56 | #define UART_FLAG_DSR (1 << 1) |
| 57 | #define UART_FLAG_DCD (1 << 2) |
| 58 | #define UART_FLAG_BUSY (1 << 3) |
| 59 | #define UART_FLAG_RXFE (1 << 4) |
| 60 | #define UART_FLAG_TXFF (1 << 5) |
| 61 | #define UART_FLAG_RXFF (1 << 6) |
| 62 | #define UART_FLAG_TXFE (1 << 7) |
| 63 | |
| 64 | #endif /* _MACH_ADM5120_UART_H */ |
| 65 | |
