[PATCH 4/5] serial: remove s3c driver
Sascha Hauer
s.hauer at pengutronix.de
Tue Feb 28 05:57:26 PST 2023
The Samsung architecture has been removed, remove the serial driver
only used on this architecture as well.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
drivers/serial/Kconfig | 18 ----
drivers/serial/Makefile | 1 -
drivers/serial/serial_s3c.c | 198 ------------------------------------
3 files changed, 217 deletions(-)
delete mode 100644 drivers/serial/serial_s3c.c
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 6fda32d44c..7c9a46845a 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -107,24 +107,6 @@ config DRIVER_SERIAL_PL010
help
Enable this to get support for AMBA PL010 based serial devices
-config DRIVER_SERIAL_S3C_IMPROVED
- bool
-
-config DRIVER_SERIAL_S3C
- bool "Samsung S3C serial driver"
- depends on ARCH_SAMSUNG
- select DRIVER_SERIAL_S3C_IMPROVED if (CPU_S5PC110 || CPU_S5PV210 || CPU_S3C6410)
- default y
- help
- Say Y here if you want to use the CONS on a Samsung S3C CPU
-
-config DRIVER_SERIAL_S3C_AUTOSYNC
- bool "Enable auto flow"
- depends on DRIVER_SERIAL_S3C
- help
- Say Y here if you want to use the auto flow feature of this
- UART. RTS and CTS will be handled by the hardware when enabled.
-
config DRIVER_SERIAL_PXA
bool "PXA serial driver"
depends on ARCH_PXA
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 4b2bfb0537..5677dba631 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -12,7 +12,6 @@ obj-$(CONFIG_DRIVER_SERIAL_CLPS711X) += serial_clps711x.o
obj-$(CONFIG_DRIVER_SERIAL_NS16550) += serial_ns16550.o
obj-$(CONFIG_DRIVER_SERIAL_NS16550_PCI) += serial_ns16550_pci.o
obj-$(CONFIG_DRIVER_SERIAL_PL010) += serial_pl010.o
-obj-$(CONFIG_DRIVER_SERIAL_S3C) += serial_s3c.o
obj-$(CONFIG_DRIVER_SERIAL_STM32) += serial_stm32.o
obj-$(CONFIG_DRIVER_SERIAL_ALTERA) += serial_altera.o
obj-$(CONFIG_DRIVER_SERIAL_ALTERA_JTAG) += serial_altera_jtag.o
diff --git a/drivers/serial/serial_s3c.c b/drivers/serial/serial_s3c.c
deleted file mode 100644
index 5f6f2082eb..0000000000
--- a/drivers/serial/serial_s3c.c
+++ /dev/null
@@ -1,198 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * (c) 2009...2011 Juergen Beisert <j.beisert at pengutronix.de>
- *
- * Based on code from:
- * (c) 2004 Sascha Hauer <sascha at saschahauer.de>
- */
-
-#include <common.h>
-#include <driver.h>
-#include <init.h>
-#include <malloc.h>
-#include <io.h>
-#include <mach/s3c-generic.h>
-#include <mach/s3c-iomap.h>
-
-/* Note: Offsets are for little endian access */
-#define ULCON 0x00 /* line control */
-#define UCON 0x04 /* UART control */
-# define UCON_SET_CLK_SRC(x) (((x) & 0x03) << 10)
-# define UCON_GET_CLK_SRC(x) (((x) >> 10) & 0x03)
-#define UFCON 0x08 /* FIFO control */
-#define UMCON 0x0c /* modem control */
-#define UTRSTAT 0x10 /* Rx/Tx status */
-#define UERSTAT 0x14 /* error status */
-#define UFSTAT 0x18 /* FIFO status */
-#define UMSTAT 0x1c /* modem status */
-#define UTXH 0x20 /* transmitt */
-#define URXH 0x24 /* receive */
-#define UBRDIV 0x28 /* baudrate generator */
-#define UBRDIVSLOT 0x2c /* baudrate slot generator */
-#define UINTM 0x38 /* interrupt mask register */
-
-struct s3c_uart {
- void __iomem *regs;
- struct console_device cdev;
-};
-
-#define to_s3c_uart(c) container_of(c, struct s3c_uart, cdev)
-
-/* each architecture has a preferred reference clock for its UARTs */
-static unsigned s3c_select_arch_input_clock(void)
-{
- /* S3C24xx: 0=2=PCLK, 1=UEXTCLK, 3=FCLK/n */
- if (IS_ENABLED(CONFIG_ARCH_S3C24xx))
- return 0; /* use the internal PCLK */
- /* S3C64xx: 0=2=PCLK, 1=UCLK0, 3=UCLK1 */
- if (IS_ENABLED(CONFIG_ARCH_S3C64xx))
- return 3; /* use the internal UCLK1 */
- /* S5PCxx: 0=PCLK, 1=SCLK_UART */
- if (IS_ENABLED(CONFIG_ARCH_S5PCxx))
- return 0; /* use the internal PCLK */
-}
-
-static unsigned s3c_get_arch_uart_input_clock(void __iomem *base)
-{
- unsigned reg = readw(base + UCON);
- return s3c_get_uart_clk(UCON_GET_CLK_SRC(reg));
-}
-
-/*
- * This table takes the fractional value of the baud divisor and gives
- * the recommended setting for the UDIVSLOT register. Refer the datasheet
- * for further details
- */
-static const uint16_t udivslot_table[] __maybe_unused = {
- 0x0000, 0x0080, 0x0808, 0x0888, 0x2222, 0x4924, 0x4A52, 0x54AA,
- 0x5555, 0xD555, 0xD5D5, 0xDDD5, 0xDDDD, 0xDFDD, 0xDFDF, 0xFFDF,
-};
-
-static int s3c_serial_setbaudrate(struct console_device *cdev, int baudrate)
-{
- struct s3c_uart *priv = to_s3c_uart(cdev);
- void __iomem *base = priv->regs;
- unsigned val;
-
- if (IS_ENABLED(CONFIG_DRIVER_SERIAL_S3C_IMPROVED)) {
- val = s3c_get_arch_uart_input_clock(base) / baudrate;
- writew(udivslot_table[val & 15], base + UBRDIVSLOT);
- }
-
- val = s3c_get_arch_uart_input_clock(base) / (16 * baudrate) - 1;
- writew(val, base + UBRDIV);
-
- return 0;
-}
-
-static int s3c_serial_init_port(struct console_device *cdev)
-{
- struct s3c_uart *priv = to_s3c_uart(cdev);
- void __iomem *base = priv->regs;
-
- /* FIFO enable, Tx/Rx FIFO clear */
- writeb(0x07, base + UFCON);
- writeb(0x00, base + UMCON);
-
- /* Normal,No parity,1 stop,8 bit */
- writeb(0x03, base + ULCON);
-
- /*
- * S3C2440 SoC:
- * - no clock divider
- * all SoCs:
- * - enable receive and transmit mode
- */
- writew(0x0005 | UCON_SET_CLK_SRC(s3c_select_arch_input_clock()),
- base + UCON);
-
- if (IS_ENABLED(CONFIG_DRIVER_SERIAL_S3C_IMPROVED))
- /* 'interrupt or polling mode' for both directions */
- writeb(0xf, base + UINTM);
-
- if (IS_ENABLED(CONFIG_DRIVER_SERIAL_S3C_AUTOSYNC))
- writeb(0x10, base + UMCON); /* enable auto flow control */
- else
- writeb(0x01, base + UMCON); /* RTS up */
-
- return 0;
-}
-
-static void s3c_serial_putc(struct console_device *cdev, char c)
-{
- struct s3c_uart *priv = to_s3c_uart(cdev);
- void __iomem *base = priv->regs;
-
- /* Wait for Tx FIFO not full */
- while (!(readb(base + UTRSTAT) & 0x2))
- ;
-
- writeb(c, base + UTXH);
-}
-
-static int s3c_serial_tstc(struct console_device *cdev)
-{
- struct s3c_uart *priv = to_s3c_uart(cdev);
- void __iomem *base = priv->regs;
-
- /* If receive fifo is empty, return false */
- if (readb(base + UTRSTAT) & 0x1)
- return 1;
-
- return 0;
-}
-
-static int s3c_serial_getc(struct console_device *cdev)
-{
- struct s3c_uart *priv = to_s3c_uart(cdev);
- void __iomem *base = priv->regs;
-
- /* wait for a character */
- while (!(readb(base + UTRSTAT) & 0x1))
- ;
-
- return readb(base + URXH);
-}
-
-static void s3c_serial_flush(struct console_device *cdev)
-{
- struct s3c_uart *priv = to_s3c_uart(cdev);
- void __iomem *base = priv->regs;
-
- while (!(readb(base + UTRSTAT) & 0x4))
- ;
-}
-
-static int s3c_serial_probe(struct device *dev)
-{
- struct resource *iores;
- struct s3c_uart *priv;
- struct console_device *cdev;
-
- priv = xzalloc(sizeof(struct s3c_uart));
- cdev = &priv->cdev;
- iores = dev_request_mem_resource(dev, 0);
- if (IS_ERR(iores))
- return PTR_ERR(iores);
- priv->regs = IOMEM(iores->start);
- dev->priv = priv;
- cdev->dev = dev;
- cdev->tstc = s3c_serial_tstc;
- cdev->putc = s3c_serial_putc;
- cdev->getc = s3c_serial_getc;
- cdev->flush = s3c_serial_flush;
- cdev->setbrg = s3c_serial_setbaudrate;
-
- s3c_serial_init_port(cdev);
-
- /* Enable UART */
- console_register(cdev);
-
- return 0;
-}
-
-static struct driver s3c_serial_driver = {
- .name = "s3c_serial",
- .probe = s3c_serial_probe,
-};
-console_platform_driver(s3c_serial_driver);
--
2.30.2
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