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https://github.com/AsahiLinux/u-boot
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17fa032671
commit: 65f83802b7 "serial: 16550: Add getfcr accessor"
breaks u-boot commandline working with long commands
sending to the board.
Since the above patch, you have to setup the fcr register.
For board/archs which enable OF_PLATDATA, the new field
fcr in struct ns16550_platdata is not filled with a
default value ...
This leads in not setting up the uarts fifo, which ends
in problems, when you send long commands to u-boots
commandline.
Detected this issue with automated tbot tests on am335x
based shc board.
The error does not popup, if you type commands. You need
to copy&paste a long command to u-boots commandshell
(or send a long command with tbot)
Possible boards/plattforms with problems:
./arch/arm/cpu/arm926ejs/lpc32xx/devices.c
./arch/arm/mach-tegra/board.c
./board/overo/overo.c
./board/quipos/cairo/cairo.c
./board/logicpd/omap3som/omap3logic.c
./board/logicpd/zoom1/zoom1.c
./board/timll/devkit8000/devkit8000.c
./board/lg/sniper/sniper.c
./board/ti/beagle/beagle.c
./drivers/serial/serial_rockchip.c
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Tested-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
/*
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* Copyright (C) 2011 by Vladimir Zapolskiy <vz@mleia.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 <dm.h>
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#include <ns16550.h>
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#include <dm/platform_data/lpc32xx_hsuart.h>
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#include <asm/arch/clk.h>
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#include <asm/arch/uart.h>
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#include <asm/arch/mux.h>
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#include <asm/io.h>
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static struct clk_pm_regs *clk = (struct clk_pm_regs *)CLK_PM_BASE;
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static struct uart_ctrl_regs *ctrl = (struct uart_ctrl_regs *)UART_CTRL_BASE;
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static struct mux_regs *mux = (struct mux_regs *)MUX_BASE;
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void lpc32xx_uart_init(unsigned int uart_id)
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{
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if (uart_id < 1 || uart_id > 7)
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return;
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/* Disable loopback mode, if it is set by S1L bootloader */
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clrbits_le32(&ctrl->loop,
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UART_LOOPBACK(CONFIG_SYS_LPC32XX_UART));
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if (uart_id < 3 || uart_id > 6)
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return;
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/* Enable UART system clock */
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setbits_le32(&clk->uartclk_ctrl, CLK_UART(uart_id));
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/* Set UART into autoclock mode */
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clrsetbits_le32(&ctrl->clkmode,
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UART_CLKMODE_MASK(uart_id),
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UART_CLKMODE_AUTO(uart_id));
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/* Bypass pre-divider of UART clock */
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writel(CLK_UART_X_DIV(1) | CLK_UART_Y_DIV(1),
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&clk->u3clk + (uart_id - 3));
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}
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#if !CONFIG_IS_ENABLED(OF_CONTROL)
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static const struct ns16550_platdata lpc32xx_uart[] = {
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{ .base = UART3_BASE, .reg_shift = 2,
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.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
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{ .base = UART4_BASE, .reg_shift = 2,
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.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
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{ .base = UART5_BASE, .reg_shift = 2,
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.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
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{ .base = UART6_BASE, .reg_shift = 2,
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.clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
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};
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#if defined(CONFIG_LPC32XX_HSUART)
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static const struct lpc32xx_hsuart_platdata lpc32xx_hsuart[] = {
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{ HS_UART1_BASE, },
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{ HS_UART2_BASE, },
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{ HS_UART7_BASE, },
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};
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#endif
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U_BOOT_DEVICES(lpc32xx_uarts) = {
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#if defined(CONFIG_LPC32XX_HSUART)
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{ "lpc32xx_hsuart", &lpc32xx_hsuart[0], },
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{ "lpc32xx_hsuart", &lpc32xx_hsuart[1], },
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#endif
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{ "ns16550_serial", &lpc32xx_uart[0], },
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{ "ns16550_serial", &lpc32xx_uart[1], },
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{ "ns16550_serial", &lpc32xx_uart[2], },
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{ "ns16550_serial", &lpc32xx_uart[3], },
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#if defined(CONFIG_LPC32XX_HSUART)
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{ "lpc32xx_hsuart", &lpc32xx_hsuart[2], },
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#endif
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};
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#endif
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void lpc32xx_dma_init(void)
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{
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/* Enable DMA interface */
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writel(CLK_DMA_ENABLE, &clk->dmaclk_ctrl);
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}
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void lpc32xx_mac_init(void)
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{
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/* Enable MAC interface */
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writel(CLK_MAC_REG | CLK_MAC_SLAVE | CLK_MAC_MASTER
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#if defined(CONFIG_RMII)
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| CLK_MAC_RMII,
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#else
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| CLK_MAC_MII,
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#endif
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&clk->macclk_ctrl);
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}
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void lpc32xx_mlc_nand_init(void)
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{
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/* Enable NAND interface */
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writel(CLK_NAND_MLC | CLK_NAND_MLC_INT, &clk->flashclk_ctrl);
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}
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void lpc32xx_slc_nand_init(void)
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{
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/* Enable SLC NAND interface */
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writel(CLK_NAND_SLC | CLK_NAND_SLC_SELECT, &clk->flashclk_ctrl);
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}
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void lpc32xx_usb_init(void)
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{
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/* Do not route the UART 5 Tx/Rx pins to the USB D+ and USB D- pins. */
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clrbits_le32(&ctrl->ctrl, UART_CTRL_UART5_USB_MODE);
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}
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void lpc32xx_i2c_init(unsigned int devnum)
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{
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/* Enable I2C interface */
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uint32_t ctrl = readl(&clk->i2cclk_ctrl);
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if (devnum == 1)
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ctrl |= CLK_I2C1_ENABLE;
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if (devnum == 2)
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ctrl |= CLK_I2C2_ENABLE;
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writel(ctrl, &clk->i2cclk_ctrl);
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}
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U_BOOT_DEVICE(lpc32xx_gpios) = {
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.name = "gpio_lpc32xx"
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};
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/* Mux for SCK0, MISO0, MOSI0. We do not use SSEL0. */
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#define P_MUX_SET_SSP0 0x1600
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void lpc32xx_ssp_init(void)
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{
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/* Enable SSP0 interface */
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writel(CLK_SSP0_ENABLE_CLOCK, &clk->ssp_ctrl);
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/* Mux SSP0 pins */
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writel(P_MUX_SET_SSP0, &mux->p_mux_set);
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}
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