diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/serial/Makefile | 1 | ||||
| -rw-r--r-- | drivers/serial/opencores_yanu.c | 242 |
2 files changed, 0 insertions, 243 deletions
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index cc4aa35..fa58304 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -22,7 +22,6 @@ obj-$(CONFIG_ATMEL_USART) += atmel_usart.o obj-$(CONFIG_EFI_APP) += serial_efi.o obj-$(CONFIG_LPC32XX_HSUART) += lpc32xx_hsuart.o obj-$(CONFIG_MCFUART) += mcfuart.o -obj-$(CONFIG_OPENCORES_YANU) += opencores_yanu.o obj-$(CONFIG_SYS_NS16550) += ns16550.o obj-$(CONFIG_S5P) += serial_s5p.o obj-$(CONFIG_IMX_SERIAL) += serial_imx.o diff --git a/drivers/serial/opencores_yanu.c b/drivers/serial/opencores_yanu.c deleted file mode 100644 index f68c8d0..0000000 --- a/drivers/serial/opencores_yanu.c +++ /dev/null @@ -1,242 +0,0 @@ -/* - * Altera NiosII YANU serial interface by Imagos - * please see http://www.opencores.org/project,yanu for - * information/downloads - * - * Copyright 2010, Renato Andreola <renato.andreola@imagos.it> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <watchdog.h> -#include <asm/io.h> -#include <serial.h> - -DECLARE_GLOBAL_DATA_PTR; - -/*-----------------------------------------------------------------*/ -/* YANU Imagos serial port */ -/*-----------------------------------------------------------------*/ - -#define YANU_MAX_PRESCALER_N ((1 << 4) - 1) /* 15 */ -#define YANU_MAX_PRESCALER_M ((1 << 11) -1) /* 2047 */ -#define YANU_FIFO_SIZE (16) -#define YANU_RXFIFO_SIZE (YANU_FIFO_SIZE) -#define YANU_TXFIFO_SIZE (YANU_FIFO_SIZE) - -#define YANU_RXFIFO_DLY (10*11) -#define YANU_TXFIFO_THR (10) -#define YANU_DATA_CHAR_MASK (0xFF) - -/* data register */ -#define YANU_DATA_OFFSET (0) /* data register offset */ - -#define YANU_CONTROL_OFFSET (4) /* control register offset */ -/* interrupt enable */ -#define YANU_CONTROL_IE_RRDY (1<<0) /* ie on received character ready */ -#define YANU_CONTROL_IE_OE (1<<1) /* ie on rx overrun */ -#define YANU_CONTROL_IE_BRK (1<<2) /* ie on break detect */ -#define YANU_CONTROL_IE_FE (1<<3) /* ie on framing error */ -#define YANU_CONTROL_IE_PE (1<<4) /* ie on parity error */ -#define YANU_CONTROL_IE_TRDY (1<<5) /* ie interrupt on tranmitter ready */ -/* control bits */ -#define YANU_CONTROL_BITS_POS (6) /* bits number pos */ -#define YANU_CONTROL_BITS (1<<YANU_CONTROL_BITS_POS) /* number of rx/tx bits per word. 3 bit unsigned integer */ -#define YANU_CONTROL_BITS_N (3) /* ... its bit filed length */ -#define YANU_CONTROL_PARENA (1<<9) /* enable parity bit transmission/reception */ -#define YANU_CONTROL_PAREVEN (1<<10) /* parity even */ -#define YANU_CONTROL_STOPS (1<<11) /* number of stop bits */ -#define YANU_CONTROL_HHENA (1<<12) /* Harware Handshake enable... */ -#define YANU_CONTROL_FORCEBRK (1<<13) /* if set than txd = active (0) */ -/* tuning part */ -#define YANU_CONTROL_RDYDLY (1<<14) /* delay from "first" before setting rrdy (in bit) */ -#define YANU_CONTROL_RDYDLY_N (8) /* ... its bit filed length */ -#define YANU_CONTROL_TXTHR (1<<22) /* tx interrupt threshold: the trdy set if txfifo_chars<= txthr (chars) */ -#define YANU_CONTROL_TXTHR_N (4) /* ... its bit field length */ - -#define YANU_BAUD_OFFSET (8) /* baud register offset */ -#define YANU_BAUDM (1<<0) /* baud mantissa lsb */ -#define YANU_BAUDM_N (12) /* ...its bit filed length */ -#define YANU_BAUDE (1<<12) /* baud exponent lsb */ -#define YANU_BAUDE_N (4) /* ...its bit field length */ - -#define YANU_ACTION_OFFSET (12) /* action register... write only */ -#define YANU_ACTION_RRRDY (1<<0) /* reset rrdy */ -#define YANU_ACTION_ROE (1<<1) /* reset oe */ -#define YANU_ACTION_RBRK (1<<2) /* reset brk */ -#define YANU_ACTION_RFE (1<<3) /* reset fe */ -#define YANU_ACTION_RPE (1<<4) /* reset pe */ -#define YANU_ACTION_SRRDY (1<<5) /* set rrdy */ -#define YANU_ACTION_SOE (1<<6) /* set oe */ -#define YANU_ACTION_SBRK (1<<7) /* set brk */ -#define YANU_ACTION_SFE (1<<8) /* set fe */ -#define YANU_ACTION_SPE (1<<9) /* set pe */ -#define YANU_ACTION_RFIFO_PULL (1<<10) /* pull a char from rx fifo we MUST do it before taking a char */ -#define YANU_ACTION_RFIFO_CLEAR (1<<11) /* clear rx fifo */ -#define YANU_ACTION_TFIFO_CLEAR (1<<12) /* clear tx fifo */ -#define YANU_ACTION_RTRDY (1<<13) /* clear trdy */ -#define YANU_ACTION_STRDY (1<<14) /* set trdy */ - -#define YANU_STATUS_OFFSET (16) -#define YANU_STATUS_RRDY (1<<0) /* rxrdy flag */ -#define YANU_STATUS_TRDY (1<<1) /* txrdy flag */ -#define YANU_STATUS_OE (1<<2) /* rx overrun error */ -#define YANU_STATUS_BRK (1<<3) /* rx break detect flag */ -#define YANU_STATUS_FE (1<<4) /* rx framing error flag */ -#define YANU_STATUS_PE (1<<5) /* rx parity erro flag */ -#define YANU_RFIFO_CHARS_POS (6) -#define YANU_RFIFO_CHARS (1<<RFIFO_CHAR_POS) /* number of chars into rx fifo */ -#define YANU_RFIFO_CHARS_N (5) /* ...its bit field length: 32 chars */ -#define YANU_TFIFO_CHARS_POS (11) -#define YANU_TFIFO_CHARS (1<<TFIFO_CHAR_POS) /* number of chars into tx fifo */ -#define YANU_TFIFO_CHARS_N (5) /* ...its bit field length: 32 chars */ - -typedef volatile struct { - volatile unsigned data; - volatile unsigned control; /* control register (RW) 32-bit */ - volatile unsigned baud; /* baud/prescaler register (RW) 32-bit */ - volatile unsigned action; /* action register (W) 32-bit */ - volatile unsigned status; /* status register (R) 32-bit */ - volatile unsigned magic; /* magic register (R) 32-bit */ -} yanu_uart_t; - -static yanu_uart_t *uart = (yanu_uart_t *)CONFIG_SYS_NIOS_CONSOLE; - -static void oc_serial_setbrg(void) -{ - int n, k; - const unsigned max_uns = 0xFFFFFFFF; - unsigned best_n, best_m, baud; - unsigned baudrate; - -#if defined(CONFIG_SYS_NIOS_FIXEDBAUD) - /* Everything's already setup for fixed-baud PTF assignment */ - baudrate = CONFIG_BAUDRATE; -#else - baudrate = gd->baudrate; -#endif - /* compute best N and M couple */ - best_n = YANU_MAX_PRESCALER_N; - for (n = YANU_MAX_PRESCALER_N; n >= 0; n--) { - if ((unsigned)CONFIG_SYS_CLK_FREQ / (1 << (n + 4)) >= - baudrate) { - best_n = n; - break; - } - } - for (k = 0;; k++) { - if (baudrate <= (max_uns >> (15+n-k))) - break; - } - best_m = - (baudrate * (1 << (15 + n - k))) / - ((unsigned)CONFIG_SYS_CLK_FREQ >> k); - - baud = best_m + best_n * YANU_BAUDE; - writel(baud, &uart->baud); - - return; -} - -static int oc_serial_init(void) -{ - unsigned action,control; - - /* status register cleanup */ - action = YANU_ACTION_RRRDY | - YANU_ACTION_RTRDY | - YANU_ACTION_ROE | - YANU_ACTION_RBRK | - YANU_ACTION_RFE | - YANU_ACTION_RPE | - YANU_ACTION_RFE | YANU_ACTION_RFIFO_CLEAR | YANU_ACTION_TFIFO_CLEAR; - - writel(action, &uart->action); - - /* - * control register cleanup - * no interrupts enabled - * one stop bit - * hardware flow control disabled - * 8 bits - */ - control = (0x7 << YANU_CONTROL_BITS_POS); - /* enven parity just to be clean */ - control |= YANU_CONTROL_PAREVEN; - /* we set threshold for fifo */ - control |= YANU_CONTROL_RDYDLY * YANU_RXFIFO_DLY; - control |= YANU_CONTROL_TXTHR * YANU_TXFIFO_THR; - - writel(control, &uart->control); - - /* to set baud rate */ - serial_setbrg(); - - return (0); -} - - -/*----------------------------------------------------------------------- - * YANU CONSOLE - *---------------------------------------------------------------------*/ -static void oc_serial_putc(char c) -{ - int tx_chars; - unsigned status; - - if (c == '\n') - serial_putc ('\r'); - - while (1) { - status = readl(&uart->status); - tx_chars = (status>>YANU_TFIFO_CHARS_POS) - & ((1<<YANU_TFIFO_CHARS_N)-1); - if (tx_chars < YANU_TXFIFO_SIZE-1) - break; - WATCHDOG_RESET (); - } - - writel((unsigned char)c, &uart->data); -} - -static int oc_serial_tstc(void) -{ - unsigned status ; - - status = readl(&uart->status); - return (((status >> YANU_RFIFO_CHARS_POS) & - ((1 << YANU_RFIFO_CHARS_N) - 1)) > 0); -} - -static int oc_serial_getc(void) -{ - while (serial_tstc() == 0) - WATCHDOG_RESET (); - - /* first we pull the char */ - writel(YANU_ACTION_RFIFO_PULL, &uart->action); - - return(readl(&uart->data) & YANU_DATA_CHAR_MASK); -} - -static struct serial_device oc_serial_drv = { - .name = "oc_serial", - .start = oc_serial_init, - .stop = NULL, - .setbrg = oc_serial_setbrg, - .putc = oc_serial_putc, - .puts = default_serial_puts, - .getc = oc_serial_getc, - .tstc = oc_serial_tstc, -}; - -void oc_serial_initialize(void) -{ - serial_register(&oc_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &oc_serial_drv; -} |