/* * Copyright 2013 Google Inc. * * 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. */ #ifndef AM335X_UART_H #define AM335X_UART_H #define AM335X_UART0_BASE 0x44e09000 #define AM335X_UART1_BASE 0x48020000 #define AM335X_UART2_BASE 0x48024000 #define AM335X_UART3_BASE 0x481A6000 #define AM335X_UART4_BASE 0x481A8000 #define AM335X_UART5_BASE 0x481AA000 /* * The meaning of some AM335x UART register offsets changes depending on read * or write operation as well as various modes. See section 19.3.7.1.2 for * register access submode description and 19.5.1 for register descriptions. */ struct am335x_uart { union { /* operational mode */ uint16_t rhr; /* receiver holding (read) */ uint16_t thr; /* transmit holding (write) */ /* config mode A and B */ uint16_t dll; /* divisor latches low */ }; uint8_t rsvd_0x02[2]; union { /* operational mode */ uint16_t ier; /* interrupt enable */ /* config mode A and B */ uint16_t dlh; /* divisor latches high */ }; uint8_t rsvd_0x06[2]; union { /* operational mode, config mode A */ uint16_t iir; /* interrupt ID (read) */ uint16_t fcr; /* FIFO control (write) */ /* config mode B */ uint16_t efr; }; uint8_t rsvd_0x0a[2]; uint16_t lcr; /* line control */ uint8_t rsvd_0x0e[2]; /* 0x10 */ union { /* operational mode, config mode A */ uint16_t mcr; /* modem control */ /* config mode B */ uint16_t xon1; /* XON1 character (UART mode) */ uint16_t addr1; /* address 1 (IrDA mode) */ }; uint8_t rsvd_0x12[2]; union { /* operational mode, config mode A */ uint16_t lsr; /* line status, read-only */ /* config mode B */ uint16_t xon2; /* XON2 character (UART mode) */ uint16_t addr2; /* IrDA mode (IrDA mode) */ }; uint8_t rsvd_0x16[2]; /* * Bytes 0x18 and 0x1c depend on submode TCR_TLR. When EFR[4] = 1 and * MCR[6] = 1, transmission control register and trigger level register * will be read/written. If not, the modem status register and the * scratchpad register will be affected by read/write. */ union { /* operational mode and config mode A */ uint16_t msr; /* modem status */ /* config mode B */ uint16_t xoff1; /* xoff1 character (UART MODE) */ /* submode TCR_TLR */ uint16_t tcr; /* transmission control */ }; uint8_t rsvd_0x1a[2]; union { uint16_t spr; /* scratchpad */ /* config mode B */ uint16_t xoff2; /* xoff2 character (UART mode) */ /* submode TCR_TLR */ uint16_t tlr; /* trigger level */ }; uint8_t rsvd_0x1e[2]; /* 0x20 */ uint16_t mdr1; /* mode definition 1 */ uint8_t rsvd_0x22[2]; uint16_t mdr2; /* mode definition 2 */ uint8_t rsvd_0x26[2]; union { uint16_t sflsr; /* status FIFO line status reg (read) */ uint16_t txfll; /* transmit frame length low (write) */ }; uint8_t rsvd_0x2a[2]; union { uint16_t resume; /* resume halted operation (read) */ uint16_t txflh; /* transmit frame length high (write) */ }; uint8_t rsvd_0x2e[2]; /* 0x30 */ union { uint16_t sfregl; /* status FIFO low (read) */ uint16_t rxfll; /* received frame length low (write) */ }; uint8_t rsvd_0x32[2]; union { uint16_t sfregh; /* status FIFO high (read) */ uint16_t rxflh; /* received frame length high (write) */ }; uint8_t rsvd_0x36[2]; uint16_t blr; /* BOF control */ uint8_t rsvd_0x3a[2]; uint16_t acreg; /* auxiliary control */ uint8_t rsvd_0x3e[2]; /* 0x40 */ uint16_t scr; /* supplementary control */ uint8_t rsvd_0x42[2]; uint16_t ssr; /* supplementary status */ uint8_t rsvd_0x46[2]; uint16_t eblr; /* BOF length (operational mode only) */ uint8_t rsvd_0x4a[6]; /* 0x50 */ uint16_t mvr; /* module version (read-only) */ uint8_t rsvd_0x52[2]; uint16_t sysc; /* system config */ uint8_t rsvd_0x56[2]; uint16_t syss; /* system status (read-only) */ uint8_t rsvd_0x5a[2]; uint16_t wer; /* wake-up enable */ uint8_t rsvd_0x5e[2]; /* 0x60 */ uint16_t cfps; /* carrier prescale frequency */ uint8_t rsvd_0x62[2]; uint16_t rxfifo_lvl; /* received FIFO level */ uint8_t rsvd_0x66[2]; uint16_t txfifo_lvl; /* transmit FIFO level */ uint8_t rsvd_0x6a[2]; uint16_t ier2; /* RX/TX FIFO empty interrupt enable */ uint8_t rsvd_0x6e[2]; /* 0x70 */ uint16_t isr2; /* RX/TX FIFO empty interrupt status */ uint8_t rsvd_0x72[2]; uint16_t freq_sel; /* frequency select */ uint8_t rsvd_0x76[10]; /* 0x80 */ uint16_t mdr3; /* mode definition register 3 */ uint8_t rsvd_0x82[2]; uint16_t txdma; /* TX DMA threshold */ } __packed; #endif /* AM335X_UART_H */