diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Kconfig | 22 | ||||
| -rw-r--r-- | drivers/serial/arm_dcc.c | 13 | ||||
| -rw-r--r-- | drivers/serial/lpc32xx_hsuart.c | 103 | ||||
| -rw-r--r-- | drivers/serial/serial_pl01x.c | 28 |
4 files changed, 115 insertions, 51 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 04541c9..92084a2 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -127,6 +127,22 @@ config DEBUG_UART_APBUART will need to provide parameters to make this work. The driver will be available until the real driver model serial is running. +config DEBUG_UART_PL010 + bool "pl010" + help + Select this to enable a debug UART using the pl01x driver with the + PL010 UART type. You will need to provide parameters to make this + work. The driver will be available until the real driver model + serial is running. + +config DEBUG_UART_PL011 + bool "pl011" + help + Select this to enable a debug UART using the pl01x driver with the + PL011 UART type. You will need to provide parameters to make this + work. The driver will be available until the real driver model + serial is running. + endchoice config DEBUG_UART_BASE @@ -180,6 +196,12 @@ config DEBUG_UART_ANNOUNCE debug_uart_init()). This can be useful just as a check that everything is working. +config DEBUG_UART_SKIP_INIT + bool "Skip UART initialization" + help + Select this if the UART you want to use for debug output is already + initialized by the time U-Boot starts its execution. + config ALTERA_JTAG_UART bool "Altera JTAG UART support" depends on DM_SERIAL diff --git a/drivers/serial/arm_dcc.c b/drivers/serial/arm_dcc.c index df7eb05..4624666 100644 --- a/drivers/serial/arm_dcc.c +++ b/drivers/serial/arm_dcc.c @@ -2,18 +2,7 @@ * Copyright (C) 2004-2007 ARM Limited. * Copyright (C) 2008 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * 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 + * SPDX-License-Identifier: GPL-2.0 * * As a special exception, if other files instantiate templates or use macros * or inline functions from this file, or you compile this file and link it diff --git a/drivers/serial/lpc32xx_hsuart.c b/drivers/serial/lpc32xx_hsuart.c index c8926a8..b425375 100644 --- a/drivers/serial/lpc32xx_hsuart.c +++ b/drivers/serial/lpc32xx_hsuart.c @@ -1,89 +1,114 @@ /* - * Copyright (C) 2011 Vladimir Zapolskiy <vz@mleia.com> + * Copyright (C) 2011-2015 Vladimir Zapolskiy <vz@mleia.com> * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> -#include <asm/arch/cpu.h> -#include <asm/arch/clk.h> -#include <asm/arch/uart.h> -#include <asm/io.h> +#include <dm.h> #include <serial.h> +#include <dm/platform_data/lpc32xx_hsuart.h> + +#include <asm/arch/uart.h> #include <linux/compiler.h> DECLARE_GLOBAL_DATA_PTR; -static struct hsuart_regs *hsuart = (struct hsuart_regs *)HS_UART_BASE; +struct lpc32xx_hsuart_priv { + struct hsuart_regs *hsuart; +}; -static void lpc32xx_serial_setbrg(void) +static int lpc32xx_serial_setbrg(struct udevice *dev, int baudrate) { + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + struct hsuart_regs *hsuart = priv->hsuart; u32 div; /* UART rate = PERIPH_CLK / ((HSU_RATE + 1) x 14) */ - div = (get_serial_clock() / 14 + gd->baudrate / 2) / gd->baudrate - 1; + div = (get_serial_clock() / 14 + baudrate / 2) / baudrate - 1; if (div > 255) div = 255; writel(div, &hsuart->rate); + + return 0; } -static int lpc32xx_serial_getc(void) +static int lpc32xx_serial_getc(struct udevice *dev) { - while (!(readl(&hsuart->level) & HSUART_LEVEL_RX)) - /* NOP */; + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + struct hsuart_regs *hsuart = priv->hsuart; + + if (!(readl(&hsuart->level) & HSUART_LEVEL_RX)) + return -EAGAIN; return readl(&hsuart->rx) & HSUART_RX_DATA; } -static void lpc32xx_serial_putc(const char c) +static int lpc32xx_serial_putc(struct udevice *dev, const char c) { - if (c == '\n') - serial_putc('\r'); + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + struct hsuart_regs *hsuart = priv->hsuart; + + /* Wait for empty FIFO */ + if (readl(&hsuart->level) & HSUART_LEVEL_TX) + return -EAGAIN; writel(c, &hsuart->tx); - /* Wait for character to be sent */ - while (readl(&hsuart->level) & HSUART_LEVEL_TX) - /* NOP */; + return 0; } -static int lpc32xx_serial_tstc(void) +static int lpc32xx_serial_pending(struct udevice *dev, bool input) { - if (readl(&hsuart->level) & HSUART_LEVEL_RX) - return 1; + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + struct hsuart_regs *hsuart = priv->hsuart; + + if (input) { + if (readl(&hsuart->level) & HSUART_LEVEL_RX) + return 1; + } else { + if (readl(&hsuart->level) & HSUART_LEVEL_TX) + return 1; + } return 0; } -static int lpc32xx_serial_init(void) +static int lpc32xx_serial_init(struct hsuart_regs *hsuart) { - lpc32xx_serial_setbrg(); - /* Disable hardware RTS and CTS flow control, set up RX and TX FIFO */ writel(HSUART_CTRL_TMO_16 | HSUART_CTRL_HSU_OFFSET(20) | HSUART_CTRL_HSU_RX_TRIG_32 | HSUART_CTRL_HSU_TX_TRIG_0, &hsuart->ctrl); + return 0; } -static struct serial_device lpc32xx_serial_drv = { - .name = "lpc32xx_serial", - .start = lpc32xx_serial_init, - .stop = NULL, +static int lpc32xx_hsuart_probe(struct udevice *dev) +{ + struct lpc32xx_hsuart_platdata *platdata = dev_get_platdata(dev); + struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev); + + priv->hsuart = (struct hsuart_regs *)platdata->base; + + lpc32xx_serial_init(priv->hsuart); + + return 0; +} + +static const struct dm_serial_ops lpc32xx_hsuart_ops = { .setbrg = lpc32xx_serial_setbrg, - .putc = lpc32xx_serial_putc, - .puts = default_serial_puts, .getc = lpc32xx_serial_getc, - .tstc = lpc32xx_serial_tstc, + .putc = lpc32xx_serial_putc, + .pending = lpc32xx_serial_pending, }; -void lpc32xx_serial_initialize(void) -{ - serial_register(&lpc32xx_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &lpc32xx_serial_drv; -} +U_BOOT_DRIVER(lpc32xx_hsuart) = { + .name = "lpc32xx_hsuart", + .id = UCLASS_SERIAL, + .probe = lpc32xx_hsuart_probe, + .ops = &lpc32xx_hsuart_ops, + .priv_auto_alloc_size = sizeof(struct lpc32xx_hsuart_priv), + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c index 3a5c1d0..552c945 100644 --- a/drivers/serial/serial_pl01x.c +++ b/drivers/serial/serial_pl01x.c @@ -367,3 +367,31 @@ U_BOOT_DRIVER(serial_pl01x) = { }; #endif + +#if defined(CONFIG_DEBUG_UART_PL010) || defined(CONFIG_DEBUG_UART_PL011) + +#include <debug_uart.h> + +static void _debug_uart_init(void) +{ +#ifndef CONFIG_DEBUG_UART_SKIP_INIT + struct pl01x_regs *regs = (struct pl01x_regs *)CONFIG_DEBUG_UART_BASE; + enum pl01x_type type = CONFIG_IS_ENABLED(DEBUG_UART_PL011) ? + TYPE_PL011 : TYPE_PL010; + + pl01x_generic_serial_init(regs, type); + pl01x_generic_setbrg(regs, type, + CONFIG_DEBUG_UART_CLOCK, CONFIG_BAUDRATE); +#endif +} + +static inline void _debug_uart_putc(int ch) +{ + struct pl01x_regs *regs = (struct pl01x_regs *)CONFIG_DEBUG_UART_BASE; + + pl01x_putc(regs, ch); +} + +DEBUG_UART_FUNCS + +#endif |