Am 20.01.20 um 10:53 schrieb Alex Nemirovsky:
From: Jason Li jason.li@cortina-access.com
Add serial UART driver support for all Cortina Access CAxxxx family of SoCs.
Signed-off-by: Jason Li jason.li@cortina-access.com Signed-off-by: Alex Nemirovsky alex.nemirovsky@cortina-access.com
MAINTAINERS | 4 ++ drivers/serial/Kconfig | 7 +++ drivers/serial/Makefile | 2 +- drivers/serial/serial_cortina.c | 129 ++++++++++++++++++++++++++++++++++++++++ drivers/serial/serial_cortina.h | 83 ++++++++++++++++++++++++++ 5 files changed, 224 insertions(+), 1 deletion(-) create mode 100644 drivers/serial/serial_cortina.c create mode 100644 drivers/serial/serial_cortina.h
diff --git a/MAINTAINERS b/MAINTAINERS index f9334f9..2b3282b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -181,6 +181,8 @@ F: board/cortina/common/Kconfig F: board/cortina/common/armv8/lowlevel_init.S F: drivers/gpio/cortina_gpio.c F: drivers/watchdog/cortina_wdt.c +F: drivers/serial/serial_cortina.c +F: drivers/serial/serial_cortina.h
ARM/CZ.NIC TURRIS MOX SUPPORT M: Marek Behun marek.behun@nic.cz @@ -664,6 +666,8 @@ F: board/cortina/common/Kconfig F: board/cortina/common/mips/* F: drivers/gpio/cortina_gpio.c F: drivers/watchdog/cortina_wdt.c +F: drivers/serial/serial_cortina.c +F: drivers/serial/serial_cortina.h
MIPS MSCC M: Gregory CLEMENT gregory.clement@bootlin.com diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index ece7d87..9f76596 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -539,6 +539,13 @@ config BCM6345_SERIAL help Select this to enable UART on BCM6345 SoCs.
+config CORTINA_UART
- bool "Cortina UART support"
- depends on DM_SERIAL
- help
Select this to enable UART support for Cortina-Access UART devicesfound on CAxxxx SoCs.config FSL_LINFLEXUART bool "Freescale Linflex UART support" depends on DM_SERIAL diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 06ee306..c8f2db4 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -28,13 +28,13 @@ obj-$(CONFIG_PL010_SERIAL) += serial_pl01x.o obj-$(CONFIG_PL011_SERIAL) += serial_pl01x.o obj-$(CONFIG_SYS_NS16550_SERIAL) += serial_ns16550.o endif
obj-$(CONFIG_ALTERA_UART) += altera_uart.o obj-$(CONFIG_ALTERA_JTAG_UART) += altera_jtag_uart.o obj-$(CONFIG_AR933X_UART) += serial_ar933x.o obj-$(CONFIG_ARM_DCC) += arm_dcc.o obj-$(CONFIG_ATMEL_USART) += atmel_usart.o obj-$(CONFIG_BCM6345_SERIAL) += serial_bcm6345.o +obj-$(CONFIG_CORTINA_UART) += serial_cortina.o obj-$(CONFIG_EFI_APP) += serial_efi.o obj-$(CONFIG_LPC32XX_HSUART) += lpc32xx_hsuart.o obj-$(CONFIG_MCFUART) += mcfuart.o diff --git a/drivers/serial/serial_cortina.c b/drivers/serial/serial_cortina.c new file mode 100644 index 0000000..2b52e5d --- /dev/null +++ b/drivers/serial/serial_cortina.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0+
+/*
- (C) Copyright 2020
- Cortina-Access Ltd.
- Author: Jason Li jason.li@cortina-access.com
- */
+/* Common UART Driver for Cortina Access CAxxxx line of SoCs */
same comment as in patch 2/4. There shouldn't be a separate comment block for the description.
+#include <common.h> +#include <dm.h> +#include <errno.h> +#include <watchdog.h> +#include <asm/io.h> +#include <serial.h> +#include <linux/compiler.h> +#include "serial_cortina.h"
+#define IO_WRITE(addr, val) (*(unsigned int *)(addr) = (val)) +#define IO_READ(addr) (*(unsigned int *)(addr))
dead code, you should use the standard I/O accessors anyway
+#ifdef CONFIG_DM_SERIAL
this ifdef is superfluous because without DM_SERIAL the whole file won't be built at all
+struct ca_uart_priv {
- void __iomem *base;
+};
+int ca_serial_setbrg(struct udevice *dev, int baudrate) +{
- struct ca_uart_priv *priv = dev_get_priv(dev);
- unsigned int uart_ctrl, baud, sample;
- baud = CORTINA_UART_CLOCK / baudrate;
- uart_ctrl = readl(priv->base + UCFG);
- uart_ctrl |= (baud << 8);
- writel(uart_ctrl, priv->base + UCFG);
setbits_32() ?
- sample = baud / 2;
- sample = (sample < 7) ? 7 : sample;
- writel(sample, priv->base + URX_SAMPLE);
- return 0;
+}
+static int ca_serial_getc(struct udevice *dev) +{
- struct ca_uart_priv *priv = dev_get_priv(dev);
- int ch;
- ch = readl(priv->base + URX_DATA) & 0xFF;
- return (int)ch;
+}
+static int ca_serial_putc(struct udevice *dev, const char ch) +{
- struct ca_uart_priv *priv = dev_get_priv(dev);
- unsigned int status;
- /* Retry if TX FIFO full */
- status = readl(priv->base + UINFO);
- while (status & UINFO_TX_FIFO_FULL)
status = readl(priv->base + UINFO);
this function must not block because retry handling is done by the serial core. If the TX FIFO is full, simply return -EAGAIN.
- writel(ch, priv->base + UTX_DATA);
- return 0;
+}
+static int ca_serial_pending(struct udevice *dev, bool input) +{
- struct ca_uart_priv *priv = dev_get_priv(dev);
- unsigned int status;
- status = readl(priv->base + UINFO);
- if (status & UINFO_RX_FIFO_EMPTY) /* empty */
return 0;- else /* something in RX FIFO */
return 1;
this function has to check TX and RX FIFO dependent on parameter "input"
+}
+static int ca_serial_probe(struct udevice *dev) +{
- struct ca_uart_priv *priv = dev_get_priv(dev);
- u32 uart_ctrl;
- /* Set data, parity and stop bits */
- uart_ctrl = UCFG_EN | UCFG_TX_EN | UCFG_RX_EN | UCFG_CHAR_8;
- writel(uart_ctrl, priv->base + UCFG);
- return 0;
+}
+static int ca_serial_ofdata_to_platdata(struct udevice *dev) +{
- struct ca_uart_priv *priv = dev_get_priv(dev);
- fdt_addr_t addr;
- addr = dev_read_addr(dev);
- if (addr == FDT_ADDR_T_NONE)
return -EINVAL;- priv->base = map_physmem(addr, 0, MAP_NOCACHE);
dev_remap_addr_index() ?
- return 0;
+}
+static const struct dm_serial_ops ca_serial_ops = {
- .putc = ca_serial_putc,
- .pending = ca_serial_pending,
- .getc = ca_serial_getc,
- .setbrg = ca_serial_setbrg,
+};
+static const struct udevice_id ca_serial_ids[] = {
- {.compatible = "cortina,ca-uart"},
- {}
+};
+U_BOOT_DRIVER(serial_cortina) = { +.name = "serial_cortina", .id = UCLASS_SERIAL, .of_match =
ca_serial_ids, .ofdata_to_platdata =ca_serial_ofdata_to_platdata, .priv_auto_alloc_size =sizeof(struct ca_uart_priv), .probe = ca_serial_probe, .ops =&ca_serial_ops,};
there should be one assignment per line
+#endif /* CONFIG_DM_SERIAL */ diff --git a/drivers/serial/serial_cortina.h b/drivers/serial/serial_cortina.h new file mode 100644 index 0000000..19448f2 --- /dev/null +++ b/drivers/serial/serial_cortina.h @@ -0,0 +1,83 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/*
- u-boot/drivers/serial/serial_cortina.h
- Copyright (c) Cortina-Systems Limited 2020. All rights reserved.
Jason Li <jason.li@cortina-systems.com>
- */
+#ifndef _SERIAL_CORTINA_H_ +#define _SERIAL_CORTINA_H_
+/*
- UART Module for Cortina Access CAxxxx line of SoCs
- */
+#define UART0_BASE_ADDR CONFIG_SYS_SERIAL0 +#define UART1_BASE_ADDR CONFIG_SYS_SERIAL1
+#define CONFIG_CONS_INDEX 0
+/* Register definitions */ +#define UCFG 0x00 /* UART config register */ +#define UFC 0x04 /* Flow Control */ +#define URX_SAMPLE 0x08 /* UART RX Sample register */ +#define URT_TUNE 0x0C /* Fine tune of UART clk */ +#define UTX_DATA 0x10 /* UART TX Character data */ +#define URX_DATA 0x14 /* UART RX Character data */ +#define UINFO 0x18 /* UART Info */ +#define UINT_EN0 0x1C /* UART Interrupt enable 0*/ +#define UINT_EN1 0x20 /* UART Interrupt enable 1*/ +#define UINT0 0x24 /* UART Interrupt 0 setting/clearing */ +#define UINT1 0x28 /* UART Interrupt 1 setting/clearing */ +#define UINT_STAT 0x2C /* UART Interrupt Status */
+/* UART Control Register Bit Fields */ +#define UCFG_BAUD_COUNT BIT(8) +#define UCFG_EN BIT(7) +#define UCFG_RX_EN BIT(6) +#define UCFG_TX_EN BIT(5) +#define UCFG_PARITY_EN BIT(4) +#define UCFG_PARITY_SEL BIT(3) +#define UCFG_2STOP_BIT BIT(2) +#define UCFG_CNT1 BIT(1) +#define UCFG_CNT0 BIT(0) +#define UCFG_CHAR_5 0 +#define UCFG_CHAR_6 1 +#define UCFG_CHAR_7 2 +#define UCFG_CHAR_8 3
+#define UINFO_TX_FIFO_EMPTY BIT(3) +#define UINFO_TX_FIFO_FULL BIT(2) +#define UINFO_RX_FIFO_EMPTY BIT(1) +#define UINFO_RX_FIFO_FULL BIT(0)
+#define UINT_RX_NON_EMPTY BIT(6) +#define UINT_TX_EMPTY BIT(5) +#define UINT_RX_UNDERRUN BIT(4) +#define UINT_RX_OVERRUN BIT(3) +#define UINT_RX_PARITY_ERR BIT(2) +#define UINT_RX_STOP_ERR BIT(1) +#define UINT_TX_OVERRUN BIT(0) +#define UINT_MASK_ALL 0x7F
+/* UART CONF bits */ +#define SHF_UCONF_WL 0 +#define MSK_UCONF_WL (0x3 << SHF_UCONF_WL) +#define VAL_UCONF_WL_5 (0x0 << SHF_UCONF_WL) +#define VAL_UCONF_WL_6 (0x1 << SHF_UCONF_WL) +#define VAL_UCONF_WL_7 (0x2 << SHF_UCONF_WL) +#define VAL_UCONF_WL_8 (0x3 << SHF_UCONF_WL)
+#define SHF_UCONF_SB 2 +#define MSK_UCONF_SB (0x1 << SHF_UCONF_SB) +#define VAL_UCONF_SB_1 (0x0 << SHF_UCONF_SB) +#define VAL_UCONF_SB_2 (0x1 << SHF_UCONF_SB)
+#define SHF_UCONF_PM 3 +#define MSK_UCONF_PM (0x3 << SHF_UCONF_PM) +#define VAL_UCONF_PM_N (0x0 << SHF_UCONF_PM) +#define VAL_UCONF_PM_O (0x2 << SHF_UCONF_PM) +#define VAL_UCONF_PM_E (0x3 << SHF_UCONF_PM)
this file should be dropped. You only need add the required register definitions to serial_cortina.c
+#endif /* _SERIAL_CORTINA_H_ */