/*
- * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
- *
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
*
*
* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
*
- * SPDX-License-Identifier: GPL-2.0+
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
*/
#include <common.h>
#include <watchdog.h>
#include <serial.h>
#include <asm/arch/pxa-regs.h>
-#include <asm/arch/regs-uart.h>
#include <asm/io.h>
-#include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR;
-/*
- * The numbering scheme differs here for PXA25x, PXA27x and PXA3xx so we can
- * easily handle enabling of clock.
- */
-#ifdef CONFIG_CPU_MONAHANS
-#define UART_CLK_BASE CKENA_21_BTUART
-#define UART_CLK_REG CKENA
-#define BTUART_INDEX 0
-#define FFUART_INDEX 1
-#define STUART_INDEX 2
-#elif CONFIG_CPU_PXA25X
-#define UART_CLK_BASE (1 << 4) /* HWUART */
-#define UART_CLK_REG CKEN
-#define HWUART_INDEX 0
-#define STUART_INDEX 1
-#define FFUART_INDEX 2
-#define BTUART_INDEX 3
-#else /* PXA27x */
-#define UART_CLK_BASE CKEN5_STUART
-#define UART_CLK_REG CKEN
-#define STUART_INDEX 0
-#define FFUART_INDEX 1
-#define BTUART_INDEX 2
+#define FFUART_INDEX 0
+#define BTUART_INDEX 1
+#define STUART_INDEX 2
+
+#ifndef CONFIG_SERIAL_MULTI
+#if defined (CONFIG_FFUART)
+#define UART_INDEX FFUART_INDEX
+#elif defined (CONFIG_BTUART)
+#define UART_INDEX BTUART_INDEX
+#elif defined (CONFIG_STUART)
+#define UART_INDEX STUART_INDEX
+#else
+#error "Bad: you didn't configure serial ..."
#endif
-
-/*
- * Only PXA250 has HWUART, to avoid poluting the code with more macros,
- * artificially introduce this.
- */
-#ifndef CONFIG_CPU_PXA25X
-#define HWUART_INDEX 0xff
#endif
-static uint32_t pxa_uart_get_baud_divider(void)
+void pxa_setbrg_dev (unsigned int uart_index)
{
+ unsigned int quot = 0;
+
if (gd->baudrate == 1200)
- return 768;
+ quot = 768;
else if (gd->baudrate == 9600)
- return 96;
+ quot = 96;
else if (gd->baudrate == 19200)
- return 48;
+ quot = 48;
else if (gd->baudrate == 38400)
- return 24;
+ quot = 24;
else if (gd->baudrate == 57600)
- return 16;
+ quot = 16;
else if (gd->baudrate == 115200)
- return 8;
- else /* Unsupported baudrate */
- return 0;
-}
+ quot = 8;
+ else
+ hang ();
-static struct pxa_uart_regs *pxa_uart_index_to_regs(uint32_t uart_index)
-{
switch (uart_index) {
- case FFUART_INDEX: return (struct pxa_uart_regs *)FFUART_BASE;
- case BTUART_INDEX: return (struct pxa_uart_regs *)BTUART_BASE;
- case STUART_INDEX: return (struct pxa_uart_regs *)STUART_BASE;
- case HWUART_INDEX: return (struct pxa_uart_regs *)HWUART_BASE;
- default:
- return NULL;
- }
-}
+ case FFUART_INDEX:
+#ifdef CONFIG_CPU_MONAHANS
+ writel(readl(CKENA) | CKENA_22_FFUART, CKENA);
+#else
+ writel(readl(CKEN) | CKEN6_FFUART, CKEN);
+#endif /* CONFIG_CPU_MONAHANS */
-static void pxa_uart_toggle_clock(uint32_t uart_index, int enable)
-{
- uint32_t clk_reg, clk_offset, reg;
+ writel(0, FFIER); /* Disable for now */
+ writel(0, FFFCR); /* No fifos enabled */
- clk_reg = UART_CLK_REG;
- clk_offset = UART_CLK_BASE << uart_index;
+ /* set baud rate */
+ writel(LCR_WLS0 | LCR_WLS1 | LCR_DLAB, FFLCR);
+ writel(quot & 0xff, FFDLL);
+ writel(quot >> 8, FFDLH);
+ writel(LCR_WLS0 | LCR_WLS1, FFLCR);
- reg = readl(clk_reg);
+ writel(IER_UUE, FFIER); /* Enable FFUART */
+ break;
- if (enable)
- reg |= clk_offset;
- else
- reg &= ~clk_offset;
+ case BTUART_INDEX:
+#ifdef CONFIG_CPU_MONAHANS
+ writel(readl(CKENA) | CKENA_21_BTUART, CKENA);
+#else
+ writel(readl(CKEN) | CKEN7_BTUART, CKEN);
+#endif /* CONFIG_CPU_MONAHANS */
- writel(reg, clk_reg);
-}
+ writel(0, BTIER);
+ writel(0, BTFCR);
-/*
- * Enable clock and set baud rate, parity etc.
- */
-void pxa_setbrg_dev(uint32_t uart_index)
-{
- uint32_t divider = 0;
- struct pxa_uart_regs *uart_regs;
+ /* set baud rate */
+ writel(LCR_DLAB, BTLCR);
+ writel(quot & 0xff, BTDLL);
+ writel(quot >> 8, BTDLH);
+ writel(LCR_WLS0 | LCR_WLS1, BTLCR);
- divider = pxa_uart_get_baud_divider();
- if (!divider)
- hang();
+ writel(IER_UUE, BTIER); /* Enable BFUART */
- uart_regs = pxa_uart_index_to_regs(uart_index);
- if (!uart_regs)
- hang();
+ break;
- pxa_uart_toggle_clock(uart_index, 1);
+ case STUART_INDEX:
+#ifdef CONFIG_CPU_MONAHANS
+ writel(readl(CKENA) | CKENA_23_STUART, CKENA);
+#else
+ writel(readl(CKEN) | CKEN5_STUART, CKEN);
+#endif /* CONFIG_CPU_MONAHANS */
+
+ writel(0, STIER);
+ writel(0, STFCR);
- /* Disable interrupts and FIFOs */
- writel(0, &uart_regs->ier);
- writel(0, &uart_regs->fcr);
+ /* set baud rate */
+ writel(LCR_DLAB, STLCR);
+ writel(quot & 0xff, STDLL);
+ writel(quot >> 8, STDLH);
+ writel(LCR_WLS0 | LCR_WLS1, STLCR);
- /* Set baud rate */
- writel(LCR_WLS0 | LCR_WLS1 | LCR_DLAB, &uart_regs->lcr);
- writel(divider & 0xff, &uart_regs->dll);
- writel(divider >> 8, &uart_regs->dlh);
- writel(LCR_WLS0 | LCR_WLS1, &uart_regs->lcr);
+ writel(IER_UUE, STIER); /* Enable STUART */
+ break;
- /* Enable UART */
- writel(IER_UUE, &uart_regs->ier);
+ default:
+ hang();
+ }
}
+
/*
* Initialise the serial port with the given baudrate. The settings
* are always 8 data bits, no parity, 1 stop bit, no start bits.
+ *
*/
-int pxa_init_dev(unsigned int uart_index)
+int pxa_init_dev (unsigned int uart_index)
{
pxa_setbrg_dev (uart_index);
- return 0;
+
+ return (0);
}
+
/*
* Output a single byte to the serial port.
*/
-void pxa_putc_dev(unsigned int uart_index, const char c)
+void pxa_putc_dev (unsigned int uart_index,const char c)
{
- struct pxa_uart_regs *uart_regs;
-
- uart_regs = pxa_uart_index_to_regs(uart_index);
- if (!uart_regs)
- hang();
-
- while (!(readl(&uart_regs->lsr) & LSR_TEMT))
- WATCHDOG_RESET();
- writel(c, &uart_regs->thr);
+ switch (uart_index) {
+ case FFUART_INDEX:
+ /* wait for room in the tx FIFO on FFUART */
+ while ((readl(FFLSR) & LSR_TEMT) == 0)
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
+ writel(c, FFTHR);
+ break;
+
+ case BTUART_INDEX:
+ while ((readl(BTLSR) & LSR_TEMT) == 0)
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
+ writel(c, BTTHR);
+ break;
+
+ case STUART_INDEX:
+ while ((readl(STLSR) & LSR_TEMT) == 0)
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
+ writel(c, STTHR);
+ break;
+ }
/* If \n, also do \r */
if (c == '\n')
* otherwise. When the function is succesfull, the character read is
* written into its argument c.
*/
-int pxa_tstc_dev(unsigned int uart_index)
+int pxa_tstc_dev (unsigned int uart_index)
{
- struct pxa_uart_regs *uart_regs;
-
- uart_regs = pxa_uart_index_to_regs(uart_index);
- if (!uart_regs)
- return -1;
-
- return readl(&uart_regs->lsr) & LSR_DR;
+ switch (uart_index) {
+ case FFUART_INDEX:
+ return readl(FFLSR) & LSR_DR;
+ case BTUART_INDEX:
+ return readl(BTLSR) & LSR_DR;
+ case STUART_INDEX:
+ return readl(STLSR) & LSR_DR;
+ }
+ return -1;
}
/*
* otherwise. When the function is succesfull, the character read is
* written into its argument c.
*/
-int pxa_getc_dev(unsigned int uart_index)
+int pxa_getc_dev (unsigned int uart_index)
{
- struct pxa_uart_regs *uart_regs;
+ switch (uart_index) {
+ case FFUART_INDEX:
+ while (!(readl(FFLSR) & LSR_DR))
+ /* Reset HW Watchdog, if needed */
+ WATCHDOG_RESET();
+ return (char) readl(FFRBR) & 0xff;
+
+ case BTUART_INDEX:
+ while (!(readl(BTLSR) & LSR_DR))
+ /* Reset HW Watchdog, if needed */
+ WATCHDOG_RESET();
+ return (char) readl(BTRBR) & 0xff;
+ case STUART_INDEX:
+ while (!(readl(STLSR) & LSR_DR))
+ /* Reset HW Watchdog, if needed */
+ WATCHDOG_RESET();
+ return (char) readl(STRBR) & 0xff;
+ }
+ return -1;
+}
- uart_regs = pxa_uart_index_to_regs(uart_index);
- if (!uart_regs)
- return -1;
+void
+pxa_puts_dev (unsigned int uart_index,const char *s)
+{
+ while (*s) {
+ pxa_putc_dev (uart_index,*s++);
+ }
+}
- while (!(readl(&uart_regs->lsr) & LSR_DR))
- WATCHDOG_RESET();
- return readl(&uart_regs->rbr) & 0xff;
+#if defined (CONFIG_FFUART)
+static int ffuart_init(void)
+{
+ return pxa_init_dev(FFUART_INDEX);
}
-void pxa_puts_dev(unsigned int uart_index, const char *s)
+static void ffuart_setbrg(void)
{
- while (*s)
- pxa_putc_dev(uart_index, *s++);
+ return pxa_setbrg_dev(FFUART_INDEX);
}
-#define pxa_uart(uart, UART) \
- int uart##_init(void) \
- { \
- return pxa_init_dev(UART##_INDEX); \
- } \
- \
- void uart##_setbrg(void) \
- { \
- return pxa_setbrg_dev(UART##_INDEX); \
- } \
- \
- void uart##_putc(const char c) \
- { \
- return pxa_putc_dev(UART##_INDEX, c); \
- } \
- \
- void uart##_puts(const char *s) \
- { \
- return pxa_puts_dev(UART##_INDEX, s); \
- } \
- \
- int uart##_getc(void) \
- { \
- return pxa_getc_dev(UART##_INDEX); \
- } \
- \
- int uart##_tstc(void) \
- { \
- return pxa_tstc_dev(UART##_INDEX); \
- } \
-
-#define pxa_uart_desc(uart) \
- struct serial_device serial_##uart##_device = \
- { \
- .name = "serial_"#uart, \
- .start = uart##_init, \
- .stop = NULL, \
- .setbrg = uart##_setbrg, \
- .getc = uart##_getc, \
- .tstc = uart##_tstc, \
- .putc = uart##_putc, \
- .puts = uart##_puts, \
- };
-
-#define pxa_uart_multi(uart, UART) \
- pxa_uart(uart, UART) \
- pxa_uart_desc(uart)
-
-#if defined(CONFIG_HWUART)
- pxa_uart_multi(hwuart, HWUART)
-#endif
-#if defined(CONFIG_STUART)
- pxa_uart_multi(stuart, STUART)
-#endif
-#if defined(CONFIG_FFUART)
- pxa_uart_multi(ffuart, FFUART)
-#endif
-#if defined(CONFIG_BTUART)
- pxa_uart_multi(btuart, BTUART)
-#endif
+static void ffuart_putc(const char c)
+{
+ return pxa_putc_dev(FFUART_INDEX,c);
+}
-__weak struct serial_device *default_serial_console(void)
+static void ffuart_puts(const char *s)
{
-#if CONFIG_CONS_INDEX == 1
- return &serial_hwuart_device;
-#elif CONFIG_CONS_INDEX == 2
- return &serial_stuart_device;
-#elif CONFIG_CONS_INDEX == 3
- return &serial_ffuart_device;
-#elif CONFIG_CONS_INDEX == 4
- return &serial_btuart_device;
-#else
-#error "Bad CONFIG_CONS_INDEX."
-#endif
+ return pxa_puts_dev(FFUART_INDEX,s);
}
-void pxa_serial_initialize(void)
+static int ffuart_getc(void)
{
-#if defined(CONFIG_FFUART)
- serial_register(&serial_ffuart_device);
+ return pxa_getc_dev(FFUART_INDEX);
+}
+
+static int ffuart_tstc(void)
+{
+ return pxa_tstc_dev(FFUART_INDEX);
+}
+
+struct serial_device serial_ffuart_device =
+{
+ "serial_ffuart",
+ "PXA",
+ ffuart_init,
+ NULL,
+ ffuart_setbrg,
+ ffuart_getc,
+ ffuart_tstc,
+ ffuart_putc,
+ ffuart_puts,
+};
#endif
-#if defined(CONFIG_BTUART)
- serial_register(&serial_btuart_device);
+
+#if defined (CONFIG_BTUART)
+static int btuart_init(void)
+{
+ return pxa_init_dev(BTUART_INDEX);
+}
+
+static void btuart_setbrg(void)
+{
+ return pxa_setbrg_dev(BTUART_INDEX);
+}
+
+static void btuart_putc(const char c)
+{
+ return pxa_putc_dev(BTUART_INDEX,c);
+}
+
+static void btuart_puts(const char *s)
+{
+ return pxa_puts_dev(BTUART_INDEX,s);
+}
+
+static int btuart_getc(void)
+{
+ return pxa_getc_dev(BTUART_INDEX);
+}
+
+static int btuart_tstc(void)
+{
+ return pxa_tstc_dev(BTUART_INDEX);
+}
+
+struct serial_device serial_btuart_device =
+{
+ "serial_btuart",
+ "PXA",
+ btuart_init,
+ NULL,
+ btuart_setbrg,
+ btuart_getc,
+ btuart_tstc,
+ btuart_putc,
+ btuart_puts,
+};
#endif
-#if defined(CONFIG_STUART)
- serial_register(&serial_stuart_device);
+
+#if defined (CONFIG_STUART)
+static int stuart_init(void)
+{
+ return pxa_init_dev(STUART_INDEX);
+}
+
+static void stuart_setbrg(void)
+{
+ return pxa_setbrg_dev(STUART_INDEX);
+}
+
+static void stuart_putc(const char c)
+{
+ return pxa_putc_dev(STUART_INDEX,c);
+}
+
+static void stuart_puts(const char *s)
+{
+ return pxa_puts_dev(STUART_INDEX,s);
+}
+
+static int stuart_getc(void)
+{
+ return pxa_getc_dev(STUART_INDEX);
+}
+
+static int stuart_tstc(void)
+{
+ return pxa_tstc_dev(STUART_INDEX);
+}
+
+struct serial_device serial_stuart_device =
+{
+ "serial_stuart",
+ "PXA",
+ stuart_init,
+ NULL,
+ stuart_setbrg,
+ stuart_getc,
+ stuart_tstc,
+ stuart_putc,
+ stuart_puts,
+};
#endif
+
+
+#ifndef CONFIG_SERIAL_MULTI
+inline int serial_init(void) {
+ return (pxa_init_dev(UART_INDEX));
+}
+void serial_setbrg(void) {
+ pxa_setbrg_dev(UART_INDEX);
+}
+int serial_getc(void) {
+ return(pxa_getc_dev(UART_INDEX));
+}
+int serial_tstc(void) {
+ return(pxa_tstc_dev(UART_INDEX));
+}
+void serial_putc(const char c) {
+ pxa_putc_dev(UART_INDEX,c);
+}
+void serial_puts(const char *s) {
+ pxa_puts_dev(UART_INDEX,s);
}
+#endif /* CONFIG_SERIAL_MULTI */
projects / platform / kernel / u-boot.git / blobdiff