sparc: Update LEON serial drivers to use readl/writel macros
Update the LEON2/3 serial driver to make use of the readl and writel macros as well as the WATCHDOG_RESET() macro. Add readl/writel and friends to the asm/io.h file. Introduce the gd->arch.uart variable to store register address. Lastly, remove baudrate scaler macro variables from board config. It is now calculated in the serial driver using the global data variable. Signed-off-by: Francois Retief <fgretief@spaceteq.co.za>
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@ -1,72 +1,78 @@
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/* GRLIB APBUART Serial controller driver
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*
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* (C) Copyright 2008
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* Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
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* (C) Copyright 2008, 2015
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* Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/processor.h>
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#include <asm/leon.h>
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#include <asm/io.h>
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#include <serial.h>
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#include <linux/compiler.h>
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#include <watchdog.h>
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DECLARE_GLOBAL_DATA_PTR;
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static unsigned leon2_serial_calc_scaler(unsigned freq, unsigned baud)
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{
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return (((freq*10) / (baud*8)) - 5) / 10;
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}
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static int leon2_serial_init(void)
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{
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LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
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LEON2_regs *leon2 = (LEON2_regs *)LEON2_PREGS;
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LEON2_Uart_regs *regs;
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unsigned int tmp;
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/* Init LEON2 UART
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*
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* Set scaler / baud rate
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*
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* Receiver & transmitter enable
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*/
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#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
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regs = (LEON2_Uart_regs *)&leon2->UART_Channel_1;
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#else
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
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regs = (LEON2_Uart_regs *)&leon2->UART_Channel_2;
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#endif
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regs->UART_Scaler = CONFIG_SYS_LEON2_UART1_SCALER;
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/* Set scaler / baud rate */
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tmp = leon2_serial_calc_scaler(CONFIG_SYS_CLK_FREQ, CONFIG_BAUDRATE);
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writel(tmp, ®s->UART_Scaler);
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/* Let bit 11 be unchanged (debug bit for GRMON) */
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tmp = READ_WORD(regs->UART_Control);
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regs->UART_Control = ((tmp & LEON2_UART_CTRL_DBG) |
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(LEON2_UART1_LOOPBACK_ENABLE << 7) |
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(LEON2_UART1_FLOWCTRL_ENABLE << 6) |
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(LEON2_UART1_PARITY_ENABLE << 5) |
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(LEON2_UART1_ODDPAR_ENABLE << 4) |
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LEON2_UART_CTRL_RE | LEON2_UART_CTRL_TE);
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tmp = readl(®s->UART_Control) & LEON2_UART_CTRL_DBG;
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tmp |= (LEON2_UART1_LOOPBACK_ENABLE << 7);
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tmp |= (LEON2_UART1_FLOWCTRL_ENABLE << 6);
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tmp |= (LEON2_UART1_PARITY_ENABLE << 5);
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tmp |= (LEON2_UART1_ODDPAR_ENABLE << 4);
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/* Receiver & transmitter enable */
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tmp |= (LEON2_UART_CTRL_RE | LEON2_UART_CTRL_TE);
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writel(tmp, ®s->UART_Control);
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gd->arch.uart = regs;
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return 0;
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}
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static inline LEON2_Uart_regs *leon2_get_uart_regs(void)
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{
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LEON2_Uart_regs *uart = gd->arch.uart;
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return uart;
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}
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static void leon2_serial_putc_raw(const char c)
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{
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LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
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LEON2_Uart_regs *regs;
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LEON2_Uart_regs *uart = leon2_get_uart_regs();
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#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
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#else
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
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#endif
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if (!uart)
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return;
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/* Wait for last character to go. */
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while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_THE)) ;
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while (!(readl(&uart->UART_Status) & LEON2_UART_STAT_THE))
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WATCHDOG_RESET();
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/* Send data */
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regs->UART_Channel = c;
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writel(c, &uart->UART_Channel);
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#ifdef LEON_DEBUG
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/* Wait for data to be sent */
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while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_TSE)) ;
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while (!(readl(&uart->UART_Status) & LEON2_UART_STAT_TSE))
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WATCHDOG_RESET();
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#endif
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}
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@ -80,56 +86,43 @@ static void leon2_serial_putc(const char c)
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static int leon2_serial_getc(void)
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{
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LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
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LEON2_Uart_regs *regs;
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LEON2_Uart_regs *uart = leon2_get_uart_regs();
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#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
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#else
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
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#endif
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if (!uart)
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return 0;
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/* Wait for a character to arrive. */
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while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_DR)) ;
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while (!(readl(&uart->UART_Status) & LEON2_UART_STAT_DR))
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WATCHDOG_RESET();
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/* read data */
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return READ_WORD(regs->UART_Channel);
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/* Read character data */
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return readl(&uart->UART_Channel);
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}
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static int leon2_serial_tstc(void)
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{
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LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
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LEON2_Uart_regs *regs;
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LEON2_Uart_regs *uart = leon2_get_uart_regs();
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#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
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#else
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
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#endif
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if (!uart)
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return 0;
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return (READ_WORD(regs->UART_Status) & LEON2_UART_STAT_DR);
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return readl(&uart->UART_Status) & LEON2_UART_STAT_DR;
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}
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/* set baud rate for uart */
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static void leon2_serial_setbrg(void)
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{
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/* update baud rate settings, read it from gd->baudrate */
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LEON2_Uart_regs *uart = leon2_get_uart_regs();
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unsigned int scaler;
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LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
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LEON2_Uart_regs *regs;
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#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1;
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#else
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regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2;
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#endif
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if (!uart)
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return;
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if (gd->baudrate > 0) {
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scaler =
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(((CONFIG_SYS_CLK_FREQ * 10) / (gd->baudrate * 8)) -
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5) / 10;
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regs->UART_Scaler = scaler;
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}
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if (!gd->baudrate)
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gd->baudrate = CONFIG_BAUDRATE;
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scaler = leon2_serial_calc_scaler(CONFIG_SYS_CLK_FREQ, CONFIG_BAUDRATE);
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writel(scaler, &uart->UART_Scaler);
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}
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static struct serial_device leon2_serial_drv = {
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@ -21,7 +21,8 @@
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#define PRINT_ROM_VEC
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*/
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extern struct linux_romvec *kernel_arg_promvec;
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extern ambapp_dev_apbuart *leon3_apbuart;
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DECLARE_GLOBAL_DATA_PTR;
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#define PROM_PGT __attribute__ ((__section__ (".prom.pgt")))
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#define PROM_TEXT __attribute__ ((__section__ (".prom.text")))
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@ -909,7 +910,7 @@ void leon_prom_init(struct leon_prom_info *pspi)
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pspi->avail.num_bytes = pspi->totphys.num_bytes;
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/* Set the pointer to the Console UART in romvec */
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pspi->reloc_funcs.leon3_apbuart = leon3_apbuart;
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pspi->reloc_funcs.leon3_apbuart = gd->arch.uart;
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{
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int j = 1;
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@ -1,66 +1,70 @@
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/* GRLIB APBUART Serial controller driver
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*
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* (C) Copyright 2007
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* Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
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* (C) Copyright 2007, 2015
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* Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/processor.h>
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#include <asm/leon.h>
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#include <asm/io.h>
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#include <ambapp.h>
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#include <serial.h>
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#include <linux/compiler.h>
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#include <watchdog.h>
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DECLARE_GLOBAL_DATA_PTR;
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ambapp_dev_apbuart *leon3_apbuart = NULL;
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static int leon3_serial_init(void)
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{
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ambapp_dev_apbuart *uart;
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ambapp_apbdev apbdev;
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unsigned int tmp;
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/* find UART */
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if (ambapp_apb_first(VENDOR_GAISLER, GAISLER_APBUART, &apbdev) == 1) {
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if (ambapp_apb_first(VENDOR_GAISLER, GAISLER_APBUART, &apbdev) != 1)
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return -1; /* didn't find hardware */
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leon3_apbuart = (ambapp_dev_apbuart *) apbdev.address;
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/* found apbuart, let's init .. */
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uart = (ambapp_dev_apbuart *) apbdev.address;
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/* found apbuart, let's init...
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*
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* Set scaler / baud rate
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*
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* Receiver & transmitter enable
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*/
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leon3_apbuart->scaler = CONFIG_SYS_GRLIB_APBUART_SCALER;
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/* Set scaler / baud rate */
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tmp = (((CONFIG_SYS_CLK_FREQ*10) / (CONFIG_BAUDRATE*8)) - 5)/10;
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writel(tmp, &uart->scaler);
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/* Let bit 11 be unchanged (debug bit for GRMON) */
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tmp = READ_WORD(leon3_apbuart->ctrl);
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/* Let bit 11 be unchanged (debug bit for GRMON) */
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tmp = readl(&uart->ctrl) & LEON_REG_UART_CTRL_DBG;
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/* Receiver & transmitter enable */
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tmp |= LEON_REG_UART_CTRL_RE | LEON_REG_UART_CTRL_TE;
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writel(tmp, &uart->ctrl);
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leon3_apbuart->ctrl = ((tmp & LEON_REG_UART_CTRL_DBG) |
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LEON_REG_UART_CTRL_RE |
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LEON_REG_UART_CTRL_TE);
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gd->arch.uart = uart;
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return 0;
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}
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return 0;
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}
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return -1; /* didn't find hardware */
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static inline ambapp_dev_apbuart *leon3_get_uart_regs(void)
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{
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ambapp_dev_apbuart *uart = gd->arch.uart;
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return uart;
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}
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static void leon3_serial_putc_raw(const char c)
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{
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if (!leon3_apbuart)
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ambapp_dev_apbuart * const uart = leon3_get_uart_regs();
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if (!uart)
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return;
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/* Wait for last character to go. */
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while (!(READ_WORD(leon3_apbuart->status) & LEON_REG_UART_STATUS_THE)) ;
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while (!(readl(&uart->status) & LEON_REG_UART_STATUS_THE))
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WATCHDOG_RESET();
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/* Send data */
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leon3_apbuart->data = c;
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writel(c, &uart->data);
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#ifdef LEON_DEBUG
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/* Wait for data to be sent */
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while (!(READ_WORD(leon3_apbuart->status) & LEON_REG_UART_STATUS_TSE)) ;
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while (!(readl(&uart->status) & LEON_REG_UART_STATUS_TSE))
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WATCHDOG_RESET();
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#endif
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}
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@ -74,36 +78,44 @@ static void leon3_serial_putc(const char c)
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static int leon3_serial_getc(void)
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{
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if (!leon3_apbuart)
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ambapp_dev_apbuart * const uart = leon3_get_uart_regs();
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if (!uart)
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return 0;
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/* Wait for a character to arrive. */
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while (!(READ_WORD(leon3_apbuart->status) & LEON_REG_UART_STATUS_DR)) ;
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while (!(readl(&uart->status) & LEON_REG_UART_STATUS_DR))
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WATCHDOG_RESET();
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/* read data */
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return READ_WORD(leon3_apbuart->data);
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/* Read character data */
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return readl(&uart->data);
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}
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static int leon3_serial_tstc(void)
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{
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if (leon3_apbuart)
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return (READ_WORD(leon3_apbuart->status) &
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LEON_REG_UART_STATUS_DR);
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return 0;
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ambapp_dev_apbuart * const uart = leon3_get_uart_regs();
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if (!uart)
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return 0;
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return readl(&uart->status) & LEON_REG_UART_STATUS_DR;
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}
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/* set baud rate for uart */
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static void leon3_serial_setbrg(void)
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{
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/* update baud rate settings, read it from gd->baudrate */
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ambapp_dev_apbuart * const uart = leon3_get_uart_regs();
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unsigned int scaler;
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if (leon3_apbuart && (gd->baudrate > 0)) {
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scaler =
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(((CONFIG_SYS_CLK_FREQ * 10) / (gd->baudrate * 8)) -
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5) / 10;
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leon3_apbuart->scaler = scaler;
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}
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return;
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if (!uart)
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return;
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if (!gd->baudrate)
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gd->baudrate = CONFIG_BAUDRATE;
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scaler = (((CONFIG_SYS_CLK_FREQ*10) / (gd->baudrate*8)) - 5)/10;
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writel(scaler, &uart->scaler);
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}
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static struct serial_device leon3_serial_drv = {
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@ -15,6 +15,7 @@
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/* Architecture-specific global data */
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struct arch_global_data {
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void *uart;
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};
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#include <asm-generic/global_data.h>
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@ -1,7 +1,7 @@
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/* SPARC I/O definitions
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*
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* (C) Copyright 2007
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* Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
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* (C) Copyright 2007, 2015
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* Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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@ -12,45 +12,57 @@
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/* Nothing to sync, total store ordering (TSO)... */
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#define sync()
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/*
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* Generic virtual read/write.
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*/
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#ifndef CONFIG_SYS_HAS_NO_CACHE
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/* Forces a cache miss on read/load.
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* On some architectures we need to bypass the cache when reading
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* I/O registers so that we are not reading the same status word
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* over and over again resulting in a hang (until an IRQ if lucky)
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*
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*/
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#ifndef CONFIG_SYS_HAS_NO_CACHE
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#define READ_BYTE(var) SPARC_NOCACHE_READ_BYTE((unsigned int)(var))
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#define READ_HWORD(var) SPARC_NOCACHE_READ_HWORD((unsigned int)(var))
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#define READ_WORD(var) SPARC_NOCACHE_READ((unsigned int)(var))
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#define READ_DWORD(var) SPARC_NOCACHE_READ_DWORD((unsigned int)(var))
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#define __arch_getb(a) SPARC_NOCACHE_READ_BYTE((unsigned int)(a))
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#define __arch_getw(a) SPARC_NOCACHE_READ_HWORD((unsigned int)(a))
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#define __arch_getl(a) SPARC_NOCACHE_READ((unsigned int)(a))
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#define __arch_getq(a) SPARC_NOCACHE_READ_DWORD((unsigned int)(a))
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#else
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#define READ_BYTE(var) (var)
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#define READ_HWORD(var) (var)
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#define READ_WORD(var) (var)
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#define READ_DWORD(var) (var)
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#endif
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/*
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* Generic virtual read/write.
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*/
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#define __arch_getb(a) (READ_BYTE(a))
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#define __arch_getw(a) (READ_HWORD(a))
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#define __arch_getl(a) (READ_WORD(a))
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#define __arch_getq(a) (READ_DWORD(a))
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#define __arch_getb(a) (*(volatile unsigned char *)(a))
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#define __arch_getw(a) (*(volatile unsigned short *)(a))
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#define __arch_getl(a) (*(volatile unsigned int *)(a))
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#define __arch_getq(a) (*(volatile unsigned long long *)(a))
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#define __arch_putb(v,a) (*(volatile unsigned char *)(a) = (v))
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#define __arch_putw(v,a) (*(volatile unsigned short *)(a) = (v))
|
||||
#define __arch_putl(v,a) (*(volatile unsigned int *)(a) = (v))
|
||||
#endif /* CONFIG_SYS_HAS_NO_CACHE */
|
||||
|
||||
#define __raw_writeb(v,a) __arch_putb(v,a)
|
||||
#define __raw_writew(v,a) __arch_putw(v,a)
|
||||
#define __raw_writel(v,a) __arch_putl(v,a)
|
||||
#define __arch_putb(v, a) (*(volatile unsigned char *)(a) = (v))
|
||||
#define __arch_putw(v, a) (*(volatile unsigned short *)(a) = (v))
|
||||
#define __arch_putl(v, a) (*(volatile unsigned int *)(a) = (v))
|
||||
#define __arch_putq(v, a) (*(volatile unsigned long long *)(a) = (v))
|
||||
|
||||
#define __raw_writeb(v, a) __arch_putb(v, a)
|
||||
#define __raw_writew(v, a) __arch_putw(v, a)
|
||||
#define __raw_writel(v, a) __arch_putl(v, a)
|
||||
#define __raw_writeq(v, a) __arch_putq(v, a)
|
||||
|
||||
#define __raw_readb(a) __arch_getb(a)
|
||||
#define __raw_readw(a) __arch_getw(a)
|
||||
#define __raw_readl(a) __arch_getl(a)
|
||||
#define __raw_readq(a) __arch_getq(a)
|
||||
|
||||
#define writeb __raw_writeb
|
||||
#define writew __raw_writew
|
||||
#define writel __raw_writel
|
||||
#define writeq __raw_writeq
|
||||
|
||||
#define readb __raw_readb
|
||||
#define readw __raw_readw
|
||||
#define readl __raw_readl
|
||||
#define readq __raw_readq
|
||||
|
||||
/*
|
||||
* Given a physical address and a length, return a virtual address
|
||||
* that can be used to access the memory range with the caching
|
||||
|
@ -342,10 +342,6 @@
|
||||
#define CONFIG_SYS_GRLIB_DDR2_CFG1 0x00000000
|
||||
#define CONFIG_SYS_GRLIB_DDR2_CFG3 0x00000000
|
||||
|
||||
/* Calculate scaler register value from default baudrate */
|
||||
#define CONFIG_SYS_GRLIB_APBUART_SCALER \
|
||||
((((CONFIG_SYS_CLK_FREQ*10)/(CONFIG_BAUDRATE*8))-5)/10)
|
||||
|
||||
/* Identification string */
|
||||
#define CONFIG_IDENT_STRING "GAISLER LEON3 GR-CPCI-AX2000"
|
||||
|
||||
|
@ -309,10 +309,6 @@
|
||||
#define CONFIG_SYS_GRLIB_DDR2_CFG1 0x00000000
|
||||
#define CONFIG_SYS_GRLIB_DDR2_CFG3 0x00000000
|
||||
|
||||
/* Calculate scaler register value from default baudrate */
|
||||
#define CONFIG_SYS_GRLIB_APBUART_SCALER \
|
||||
((((CONFIG_SYS_CLK_FREQ*10)/(CONFIG_BAUDRATE*8))-5)/10)
|
||||
|
||||
/* Identification string */
|
||||
#define CONFIG_IDENT_STRING "GAISLER LEON3 EP2S60"
|
||||
|
||||
|
@ -274,10 +274,6 @@
|
||||
#define CONFIG_SYS_GRLIB_DDR2_CFG1 0x00000000
|
||||
#define CONFIG_SYS_GRLIB_DDR2_CFG3 0x00000000
|
||||
|
||||
/* Calculate scaler register value from default baudrate */
|
||||
#define CONFIG_SYS_GRLIB_APBUART_SCALER \
|
||||
((((CONFIG_SYS_CLK_FREQ*10)/(CONFIG_BAUDRATE*8))-5)/10)
|
||||
|
||||
/* Identification string */
|
||||
#define CONFIG_IDENT_STRING "GAISLER LEON3 GR-XC3S-1500"
|
||||
|
||||
|
@ -280,9 +280,6 @@
|
||||
#define CONFIG_SYS_GRLIB_DDR2_CFG1 0x00000000
|
||||
#define CONFIG_SYS_GRLIB_DDR2_CFG3 0x00000000
|
||||
|
||||
#define CONFIG_SYS_GRLIB_APBUART_SCALER \
|
||||
((((CONFIG_SYS_CLK_FREQ*10)/(CONFIG_BAUDRATE*8))-5)/10)
|
||||
|
||||
/* default kernel command line */
|
||||
#define CONFIG_DEFAULT_KERNEL_COMMAND_LINE "console=ttyS0,38400\0\0"
|
||||
|
||||
|
@ -264,8 +264,6 @@
|
||||
#define CONFIG_SYS_GRLIB_MEMCFG3 0x00136000
|
||||
|
||||
/*** LEON2 UART 1 ***/
|
||||
#define CONFIG_SYS_LEON2_UART1_SCALER \
|
||||
((((CONFIG_SYS_CLK_FREQ*10)/(CONFIG_BAUDRATE*8))-5)/10)
|
||||
|
||||
/* UART1 Define to 1 or 0 */
|
||||
#define LEON2_UART1_LOOPBACK_ENABLE 0
|
||||
@ -275,9 +273,6 @@
|
||||
|
||||
/*** LEON2 UART 2 ***/
|
||||
|
||||
#define CONFIG_SYS_LEON2_UART2_SCALER \
|
||||
((((CONFIG_SYS_CLK_FREQ*10)/(CONFIG_BAUDRATE*8))-5)/10)
|
||||
|
||||
/* UART2 Define to 1 or 0 */
|
||||
#define LEON2_UART2_LOOPBACK_ENABLE 0
|
||||
#define LEON2_UART2_FLOWCTRL_ENABLE 0
|
||||
|
Loading…
Reference in New Issue
Block a user