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Diffstat (limited to 'arch/sparc/cpu/leon3/serial.c')
| -rw-r--r-- | arch/sparc/cpu/leon3/serial.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/arch/sparc/cpu/leon3/serial.c b/arch/sparc/cpu/leon3/serial.c deleted file mode 100644 index bc6e7a172e..0000000000 --- a/arch/sparc/cpu/leon3/serial.c +++ /dev/null @@ -1,189 +0,0 @@ -/* GRLIB APBUART Serial controller driver - * - * (C) Copyright 2007, 2015 - * Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <asm/io.h> -#include <ambapp.h> -#include <grlib/apbuart.h> -#include <serial.h> -#include <watchdog.h> - -DECLARE_GLOBAL_DATA_PTR; - -/* Select which UART that will become u-boot console */ -#ifndef CONFIG_SYS_GRLIB_APBUART_INDEX -/* Try to use CONFIG_CONS_INDEX, if available, it is numbered from 1 */ -#ifdef CONFIG_CONS_INDEX -#define CONFIG_SYS_GRLIB_APBUART_INDEX (CONFIG_CONS_INDEX - 1) -#else -#define CONFIG_SYS_GRLIB_APBUART_INDEX 0 -#endif -#endif - -static unsigned apbuart_calc_scaler(unsigned apbuart_freq, unsigned baud) -{ - return (((apbuart_freq * 10) / (baud * 8)) - 5) / 10; -} - -static int leon3_serial_init(void) -{ - ambapp_dev_apbuart *uart; - ambapp_apbdev apbdev; - unsigned int tmp; - - /* find UART */ - if (ambapp_apb_find(&ambapp_plb, VENDOR_GAISLER, GAISLER_APBUART, - CONFIG_SYS_GRLIB_APBUART_INDEX, &apbdev) != 1) { - gd->flags &= ~GD_FLG_SERIAL_READY; - panic("%s: apbuart not found!\n", __func__); - return -1; /* didn't find hardware */ - } - - /* found apbuart, let's init .. */ - uart = (ambapp_dev_apbuart *) apbdev.address; - - /* APBUART Frequency is equal to bus frequency */ - gd->arch.uart_freq = ambapp_bus_freq(&ambapp_plb, apbdev.ahb_bus_index); - - /* Set scaler / baud rate */ - tmp = apbuart_calc_scaler(gd->arch.uart_freq, CONFIG_BAUDRATE); - writel(tmp, &uart->scaler); - - /* Let bit 11 be unchanged (debug bit for GRMON) */ - tmp = readl(&uart->ctrl) & APBUART_CTRL_DBG; - /* Receiver & transmitter enable */ - tmp |= APBUART_CTRL_RE | APBUART_CTRL_TE; - writel(tmp, &uart->ctrl); - - gd->arch.uart = uart; - return 0; -} - -static inline ambapp_dev_apbuart *leon3_get_uart_regs(void) -{ - ambapp_dev_apbuart *uart = gd->arch.uart; - return uart; -} - -static void leon3_serial_putc_raw(const char c) -{ - ambapp_dev_apbuart * const uart = leon3_get_uart_regs(); - - if (!uart) - return; - - /* Wait for last character to go. */ - while (!(readl(&uart->status) & APBUART_STATUS_THE)) - WATCHDOG_RESET(); - - /* Send data */ - writel(c, &uart->data); - -#ifdef LEON_DEBUG - /* Wait for data to be sent */ - while (!(readl(&uart->status) & APBUART_STATUS_TSE)) - WATCHDOG_RESET(); -#endif -} - -static void leon3_serial_putc(const char c) -{ - if (c == '\n') - leon3_serial_putc_raw('\r'); - - leon3_serial_putc_raw(c); -} - -static int leon3_serial_getc(void) -{ - ambapp_dev_apbuart * const uart = leon3_get_uart_regs(); - - if (!uart) - return 0; - - /* Wait for a character to arrive. */ - while (!(readl(&uart->status) & APBUART_STATUS_DR)) - WATCHDOG_RESET(); - - /* Read character data */ - return readl(&uart->data); -} - -static int leon3_serial_tstc(void) -{ - ambapp_dev_apbuart * const uart = leon3_get_uart_regs(); - - if (!uart) - return 0; - - return readl(&uart->status) & APBUART_STATUS_DR; -} - -/* set baud rate for uart */ -static void leon3_serial_setbrg(void) -{ - ambapp_dev_apbuart * const uart = leon3_get_uart_regs(); - unsigned int scaler; - - if (!uart) - return; - - if (!gd->baudrate) - gd->baudrate = CONFIG_BAUDRATE; - - if (!gd->arch.uart_freq) - gd->arch.uart_freq = CONFIG_SYS_CLK_FREQ; - - scaler = apbuart_calc_scaler(gd->arch.uart_freq, gd->baudrate); - - writel(scaler, &uart->scaler); -} - -static struct serial_device leon3_serial_drv = { - .name = "leon3_serial", - .start = leon3_serial_init, - .stop = NULL, - .setbrg = leon3_serial_setbrg, - .putc = leon3_serial_putc, - .puts = default_serial_puts, - .getc = leon3_serial_getc, - .tstc = leon3_serial_tstc, -}; - -void leon3_serial_initialize(void) -{ - serial_register(&leon3_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &leon3_serial_drv; -} - -#ifdef CONFIG_DEBUG_UART_APBUART - -#include <debug_uart.h> - -static inline void _debug_uart_init(void) -{ - ambapp_dev_apbuart *uart = (ambapp_dev_apbuart *)CONFIG_DEBUG_UART_BASE; - uart->scaler = apbuart_calc_scaler(CONFIG_DEBUG_UART_CLOCK, CONFIG_BAUDRATE); - uart->ctrl = APBUART_CTRL_RE | APBUART_CTRL_TE; -} - -static inline void _debug_uart_putc(int ch) -{ - ambapp_dev_apbuart *uart = (ambapp_dev_apbuart *)CONFIG_DEBUG_UART_BASE; - while (!(readl(&uart->status) & APBUART_STATUS_THE)) - WATCHDOG_RESET(); - writel(ch, &uart->data); -} - -DEBUG_UART_FUNCS - -#endif |