diff options
Diffstat (limited to 'src/cpu/ti/am335x')
| -rw-r--r-- | src/cpu/ti/am335x/uart.h | 162 |
1 files changed, 152 insertions, 10 deletions
diff --git a/src/cpu/ti/am335x/uart.h b/src/cpu/ti/am335x/uart.h index b642e9c41a..56d4c51230 100644 --- a/src/cpu/ti/am335x/uart.h +++ b/src/cpu/ti/am335x/uart.h @@ -1,8 +1,5 @@ /* - * (C) Copyright 2012 The ChromiumOS Authors - * (C) Copyright 2009 Samsung Electronics - * Minkyu Kang <mk7.kang@samsung.com> - * Heungjun Kim <riverful.kim@samsung.com> + * 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 @@ -18,13 +15,10 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA - * - * This file is based off of arch/arm/include/asm/arch-exynos5/uart.h - * from u-boot. */ -#ifndef __AM335X_UART_H_ -#define __AM335X_UART_H +#ifndef AM335X_UART_H +#define AM335X_UART_H #define AM335X_UART0_BASE 0x44e09000 #define AM335X_UART1_BASE 0x48020000 @@ -33,4 +27,152 @@ #define AM335X_UART4_BASE 0x481A8000 #define AM335X_UART5_BASE 0x481AA000 -#endif +/* + * 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; /* auxilliary 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 (operatoinal 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 */ + +} __attribute__((packed)); + +#endif /* AM335X_UART_H */ |