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Diffstat (limited to 'src/soc/rockchip/rk3288/uart.c')
| -rw-r--r-- | src/soc/rockchip/rk3288/uart.c | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/src/soc/rockchip/rk3288/uart.c b/src/soc/rockchip/rk3288/uart.c deleted file mode 100644 index 8576dc18e3..0000000000 --- a/src/soc/rockchip/rk3288/uart.c +++ /dev/null @@ -1,163 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2014 Rockchip 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; version 2 of the License. - * - * 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. - */ - -#include <arch/io.h> -#include <boot/coreboot_tables.h> -#include <console/console.h> /* for __console definition */ -#include <console/uart.h> -#include <drivers/uart/uart8250reg.h> -#include <stdint.h> - -/* - * TODO: Use DRIVERS_UART_8250MEM driver instead. - * There is an issue in the IO call functions where x86 and ARM - * ordering is reversed. This 8250MEM driver uses the x86 convention. - * This driver can be replaced once the IO calls are sorted. - */ - -struct rk3288_uart { - union { - uint32_t thr; /* Transmit holding register. */ - uint32_t rbr; /* Receive buffer register. */ - uint32_t dll; /* Divisor latch lsb. */ - }; - union { - uint32_t ier; /* Interrupt enable register. */ - uint32_t dlm; /* Divisor latch msb. */ - }; - union { - uint32_t iir; /* Interrupt identification register. */ - uint32_t fcr; /* FIFO control register. */ - }; - uint32_t lcr; /* Line control register. */ - uint32_t mcr; /* Modem control register. */ - uint32_t lsr; /* Line status register. */ - uint32_t msr; /* Modem status register. */ - uint32_t scr; - uint32_t reserved1[(0x30 - 0x20) / 4]; - uint32_t srbr[(0x70 - 0x30) / 4]; - uint32_t far; - uint32_t tfr; - uint32_t rfw; - uint32_t usr; - uint32_t tfl; - uint32_t rfl; - uint32_t srr; - uint32_t srts; - uint32_t sbcr; - uint32_t sdmam; - uint32_t sfe; - uint32_t srt; - uint32_t stet; - uint32_t htx; - uint32_t dmasa; - uint32_t reserver2[(0xf4 - 0xac) / 4]; - uint32_t cpr; - uint32_t ucv; - uint32_t ctr; -} __attribute__ ((packed)); - - -static struct rk3288_uart * const uart_ptr = - (void *)CONFIG_CONSOLE_SERIAL_UART_ADDRESS; - -static void rk3288_uart_tx_flush(void); -static int rk3288_uart_tst_byte(void); - -static void rk3288_uart_init(void) -{ - /* FIXME: Use a hardcoded divisor for now. - * uint16_t divisor = (u16) uart_baudrate_divisor(default_baudrate(), - * uart_platform_refclk(), 16) - */ - const unsigned divisor = 13; - const uint8_t line_config = UART8250_LCR_WLS_8; // 8n1 - - rk3288_uart_tx_flush(); - - // Disable interrupts. - write32(&uart_ptr->ier, 0); - // Force DTR and RTS to high. - write32(&uart_ptr->mcr, UART8250_MCR_DTR | UART8250_MCR_RTS); - // Set line configuration, access divisor latches. - write32(&uart_ptr->lcr, UART8250_LCR_DLAB | line_config); - // Set the divisor. - write32(&uart_ptr->dll, divisor & 0xff); - write32(&uart_ptr->dlm, (divisor >> 8) & 0xff); - // Hide the divisor latches. - write32(&uart_ptr->lcr, line_config); - // Enable FIFOs, and clear receive and transmit. - write32(&uart_ptr->fcr, UART8250_FCR_FIFO_EN | - UART8250_FCR_CLEAR_RCVR | UART8250_FCR_CLEAR_XMIT); -} - -static void rk3288_uart_tx_byte(unsigned char data) -{ - while (!(read32(&uart_ptr->lsr) & UART8250_LSR_THRE)); - write32(&uart_ptr->thr, data); -} - -static void rk3288_uart_tx_flush(void) -{ - while (!(read32(&uart_ptr->lsr) & UART8250_LSR_TEMT)); -} - -static unsigned char rk3288_uart_rx_byte(void) -{ - if (!rk3288_uart_tst_byte()) - return 0; - return read32(&uart_ptr->rbr); -} - -static int rk3288_uart_tst_byte(void) -{ - return (read32(&uart_ptr->lsr) & UART8250_LSR_DR) == UART8250_LSR_DR; -} - - - -void uart_init(int idx) -{ - rk3288_uart_init(); -} - -unsigned char uart_rx_byte(int idx) -{ - return rk3288_uart_rx_byte(); -} - -void uart_tx_byte(int idx, unsigned char data) -{ - rk3288_uart_tx_byte(data); -} - -void uart_tx_flush(int idx) -{ - rk3288_uart_tx_flush(); -} - -#ifndef __PRE_RAM__ -void uart_fill_lb(void *data) -{ - struct lb_serial serial; - serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED; - serial.baseaddr = CONFIG_CONSOLE_SERIAL_UART_ADDRESS; - serial.baud = default_baudrate(); - serial.regwidth = 4; - lb_add_serial(&serial, data); - - lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data); -} -#endif |