diff options
Diffstat (limited to 'arch/sparc/cpu/leon2/serial.c')
| -rw-r--r-- | arch/sparc/cpu/leon2/serial.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/arch/sparc/cpu/leon2/serial.c b/arch/sparc/cpu/leon2/serial.c deleted file mode 100644 index 460abd1d9f..0000000000 --- a/arch/sparc/cpu/leon2/serial.c +++ /dev/null @@ -1,147 +0,0 @@ -/* GRLIB APBUART Serial controller driver - * - * (C) Copyright 2008, 2015 - * Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <asm/io.h> -#include <serial.h> -#include <watchdog.h> - -DECLARE_GLOBAL_DATA_PTR; - -static unsigned leon2_serial_calc_scaler(unsigned freq, unsigned baud) -{ - return (((freq*10) / (baud*8)) - 5) / 10; -} - -static int leon2_serial_init(void) -{ - LEON2_regs *leon2 = (LEON2_regs *)LEON2_PREGS; - LEON2_Uart_regs *regs; - unsigned int tmp; - -#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1 - regs = (LEON2_Uart_regs *)&leon2->UART_Channel_1; -#else - regs = (LEON2_Uart_regs *)&leon2->UART_Channel_2; -#endif - - /* Set scaler / baud rate */ - tmp = leon2_serial_calc_scaler(CONFIG_SYS_CLK_FREQ, CONFIG_BAUDRATE); - writel(tmp, ®s->UART_Scaler); - - /* Let bit 11 be unchanged (debug bit for GRMON) */ - tmp = readl(®s->UART_Control) & LEON2_UART_CTRL_DBG; - tmp |= (LEON2_UART1_LOOPBACK_ENABLE << 7); - tmp |= (LEON2_UART1_FLOWCTRL_ENABLE << 6); - tmp |= (LEON2_UART1_PARITY_ENABLE << 5); - tmp |= (LEON2_UART1_ODDPAR_ENABLE << 4); - /* Receiver & transmitter enable */ - tmp |= (LEON2_UART_CTRL_RE | LEON2_UART_CTRL_TE); - writel(tmp, ®s->UART_Control); - - gd->arch.uart = regs; - return 0; -} - -static inline LEON2_Uart_regs *leon2_get_uart_regs(void) -{ - LEON2_Uart_regs *uart = gd->arch.uart; - - return uart; -} - -static void leon2_serial_putc_raw(const char c) -{ - LEON2_Uart_regs *uart = leon2_get_uart_regs(); - - if (!uart) - return; - - /* Wait for last character to go. */ - while (!(readl(&uart->UART_Status) & LEON2_UART_STAT_THE)) - WATCHDOG_RESET(); - - /* Send data */ - writel(c, &uart->UART_Channel); - -#ifdef LEON_DEBUG - /* Wait for data to be sent */ - while (!(readl(&uart->UART_Status) & LEON2_UART_STAT_TSE)) - WATCHDOG_RESET(); -#endif -} - -static void leon2_serial_putc(const char c) -{ - if (c == '\n') - leon2_serial_putc_raw('\r'); - - leon2_serial_putc_raw(c); -} - -static int leon2_serial_getc(void) -{ - LEON2_Uart_regs *uart = leon2_get_uart_regs(); - - if (!uart) - return 0; - - /* Wait for a character to arrive. */ - while (!(readl(&uart->UART_Status) & LEON2_UART_STAT_DR)) - WATCHDOG_RESET(); - - /* Read character data */ - return readl(&uart->UART_Channel); -} - -static int leon2_serial_tstc(void) -{ - LEON2_Uart_regs *uart = leon2_get_uart_regs(); - - if (!uart) - return 0; - - return readl(&uart->UART_Status) & LEON2_UART_STAT_DR; -} - -static void leon2_serial_setbrg(void) -{ - LEON2_Uart_regs *uart = leon2_get_uart_regs(); - unsigned int scaler; - - if (!uart) - return; - - if (!gd->baudrate) - gd->baudrate = CONFIG_BAUDRATE; - - scaler = leon2_serial_calc_scaler(CONFIG_SYS_CLK_FREQ, gd->baudrate); - - writel(scaler, &uart->UART_Scaler); -} - -static struct serial_device leon2_serial_drv = { - .name = "leon2_serial", - .start = leon2_serial_init, - .stop = NULL, - .setbrg = leon2_serial_setbrg, - .putc = leon2_serial_putc, - .puts = default_serial_puts, - .getc = leon2_serial_getc, - .tstc = leon2_serial_tstc, -}; - -void leon2_serial_initialize(void) -{ - serial_register(&leon2_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &leon2_serial_drv; -} |