Remove the legacy mxser driver and replace it with 8250-based
implementation (8250_mxupci) for Moxa UPCI serial devices.
This simplifies maintenance and improves integration with the existing
8250 serial infrastructure.
Signed-off-by: Crescent Hsieh <crescentcy.hsieh@moxa.com>
---
drivers/tty/Kconfig | 13 -
drivers/tty/Makefile | 1 -
drivers/tty/mxser.c | 1934 -------------------------
drivers/tty/serial/8250/8250_mxupci.c | 165 +++
drivers/tty/serial/8250/Kconfig | 11 +
drivers/tty/serial/8250/Makefile | 1 +
6 files changed, 177 insertions(+), 1948 deletions(-)
delete mode 100644 drivers/tty/mxser.c
create mode 100644 drivers/tty/serial/8250/8250_mxupci.c
diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig
index 63a494d36a1f..3973b52bcfce 100644
--- a/drivers/tty/Kconfig
+++ b/drivers/tty/Kconfig
@@ -218,19 +218,6 @@ config MOXA_INTELLIO
To compile this driver as a module, choose M here: the
module will be called moxa.
-config MOXA_SMARTIO
- tristate "Moxa SmartIO support v. 2.0"
- depends on SERIAL_NONSTANDARD && PCI && HAS_IOPORT
- help
- Say Y here if you have a Moxa SmartIO multiport serial card and/or
- want to help develop a new version of this driver.
-
- This is upgraded (1.9.1) driver from original Moxa drivers with
- changes finally resulting in PCI probing.
-
- This driver can also be built as a module. The module will be called
- mxser. If you want to do that, say M here.
-
config SYNCLINK_GT
tristate "SyncLink GT/AC support"
depends on SERIAL_NONSTANDARD && PCI
diff --git a/drivers/tty/Makefile b/drivers/tty/Makefile
index 07aca5184a55..7db70532e8da 100644
--- a/drivers/tty/Makefile
+++ b/drivers/tty/Makefile
@@ -18,7 +18,6 @@ obj-$(CONFIG_SERIAL_DEV_BUS) += serdev/
# tty drivers
obj-$(CONFIG_AMIGA_BUILTIN_SERIAL) += amiserial.o
obj-$(CONFIG_MOXA_INTELLIO) += moxa.o
-obj-$(CONFIG_MOXA_SMARTIO) += mxser.o
obj-$(CONFIG_NOZOMI) += nozomi.o
obj-$(CONFIG_NULL_TTY) += ttynull.o
obj-$(CONFIG_SYNCLINK_GT) += synclink_gt.o
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
deleted file mode 100644
index 4d45eca4929a..000000000000
--- a/drivers/tty/mxser.c
+++ /dev/null
@@ -1,1934 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
- *
- * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
- * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
- *
- * This code is loosely based on the 1.8 moxa driver which is based on
- * Linux serial driver, written by Linus Torvalds, Theodore T'so and
- * others.
- *
- * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
- * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
- * www.moxa.com.
- * - Fixed x86_64 cleanness
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/serial_reg.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/delay.h>
-#include <linux/pci.h>
-#include <linux/bitops.h>
-#include <linux/slab.h>
-#include <linux/ratelimit.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <linux/uaccess.h>
-
-/*
- * Semi-public control interfaces
- */
-
-/*
- * MOXA ioctls
- */
-
-#define MOXA 0x400
-#define MOXA_SET_OP_MODE (MOXA + 66)
-#define MOXA_GET_OP_MODE (MOXA + 67)
-
-#define RS232_MODE 0
-#define RS485_2WIRE_MODE 1
-#define RS422_MODE 2
-#define RS485_4WIRE_MODE 3
-#define OP_MODE_MASK 3
-
-/* --------------------------------------------------- */
-
-/*
- * Follow just what Moxa Must chip defines.
- *
- * When LCR register (offset 0x03) is written the following value, the Must chip
- * will enter enhanced mode. And a write to EFR (offset 0x02) bit 6,7 will
- * change bank.
- */
-#define MOXA_MUST_ENTER_ENHANCED 0xBF
-
-/* when enhanced mode is enabled, access to general bank register */
-#define MOXA_MUST_GDL_REGISTER 0x07
-#define MOXA_MUST_GDL_MASK 0x7F
-#define MOXA_MUST_GDL_HAS_BAD_DATA 0x80
-
-#define MOXA_MUST_LSR_RERR 0x80 /* error in receive FIFO */
-/* enhanced register bank select and enhanced mode setting register */
-/* This works only when LCR register equals to 0xBF */
-#define MOXA_MUST_EFR_REGISTER 0x02
-#define MOXA_MUST_EFR_EFRB_ENABLE 0x10 /* enhanced mode enable */
-/* enhanced register bank set 0, 1, 2 */
-#define MOXA_MUST_EFR_BANK0 0x00
-#define MOXA_MUST_EFR_BANK1 0x40
-#define MOXA_MUST_EFR_BANK2 0x80
-#define MOXA_MUST_EFR_BANK3 0xC0
-#define MOXA_MUST_EFR_BANK_MASK 0xC0
-
-/* set XON1 value register, when LCR=0xBF and change to bank0 */
-#define MOXA_MUST_XON1_REGISTER 0x04
-
-/* set XON2 value register, when LCR=0xBF and change to bank0 */
-#define MOXA_MUST_XON2_REGISTER 0x05
-
-/* set XOFF1 value register, when LCR=0xBF and change to bank0 */
-#define MOXA_MUST_XOFF1_REGISTER 0x06
-
-/* set XOFF2 value register, when LCR=0xBF and change to bank0 */
-#define MOXA_MUST_XOFF2_REGISTER 0x07
-
-#define MOXA_MUST_RBRTL_REGISTER 0x04
-#define MOXA_MUST_RBRTH_REGISTER 0x05
-#define MOXA_MUST_RBRTI_REGISTER 0x06
-#define MOXA_MUST_THRTL_REGISTER 0x07
-#define MOXA_MUST_ENUM_REGISTER 0x04
-#define MOXA_MUST_HWID_REGISTER 0x05
-#define MOXA_MUST_ECR_REGISTER 0x06
-#define MOXA_MUST_CSR_REGISTER 0x07
-
-#define MOXA_MUST_FCR_GDA_MODE_ENABLE 0x20 /* good data mode enable */
-#define MOXA_MUST_FCR_GDA_ONLY_ENABLE 0x10 /* only good data put into RxFIFO */
-
-#define MOXA_MUST_IER_ECTSI 0x80 /* enable CTS interrupt */
-#define MOXA_MUST_IER_ERTSI 0x40 /* enable RTS interrupt */
-#define MOXA_MUST_IER_XINT 0x20 /* enable Xon/Xoff interrupt */
-#define MOXA_MUST_IER_EGDAI 0x10 /* enable GDA interrupt */
-
-#define MOXA_MUST_RECV_ISR (UART_IER_RDI | MOXA_MUST_IER_EGDAI)
-
-/* GDA interrupt pending */
-#define MOXA_MUST_IIR_GDA 0x1C
-#define MOXA_MUST_IIR_RDA 0x04
-#define MOXA_MUST_IIR_RTO 0x0C
-#define MOXA_MUST_IIR_LSR 0x06
-
-/* received Xon/Xoff or specical interrupt pending */
-#define MOXA_MUST_IIR_XSC 0x10
-
-/* RTS/CTS change state interrupt pending */
-#define MOXA_MUST_IIR_RTSCTS 0x20
-#define MOXA_MUST_IIR_MASK 0x3E
-
-#define MOXA_MUST_MCR_XON_FLAG 0x40
-#define MOXA_MUST_MCR_XON_ANY 0x80
-#define MOXA_MUST_MCR_TX_XON 0x08
-
-#define MOXA_MUST_EFR_SF_MASK 0x0F /* software flow control on chip mask value */
-#define MOXA_MUST_EFR_SF_TX1 0x08 /* send Xon1/Xoff1 */
-#define MOXA_MUST_EFR_SF_TX2 0x04 /* send Xon2/Xoff2 */
-#define MOXA_MUST_EFR_SF_TX12 0x0C /* send Xon1,Xon2/Xoff1,Xoff2 */
-#define MOXA_MUST_EFR_SF_TX_NO 0x00 /* don't send Xon/Xoff */
-#define MOXA_MUST_EFR_SF_TX_MASK 0x0C /* Tx software flow control mask */
-#define MOXA_MUST_EFR_SF_RX_NO 0x00 /* don't receive Xon/Xoff */
-#define MOXA_MUST_EFR_SF_RX1 0x02 /* receive Xon1/Xoff1 */
-#define MOXA_MUST_EFR_SF_RX2 0x01 /* receive Xon2/Xoff2 */
-#define MOXA_MUST_EFR_SF_RX12 0x03 /* receive Xon1,Xon2/Xoff1,Xoff2 */
-#define MOXA_MUST_EFR_SF_RX_MASK 0x03 /* Rx software flow control mask */
-
-#define MXSERMAJOR 174
-
-#define MXSER_BOARDS 4 /* Max. boards */
-#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
-#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
-#define MXSER_ISR_PASS_LIMIT 100
-
-#define WAKEUP_CHARS 256
-
-#define MXSER_BAUD_BASE 921600
-#define MXSER_CUSTOM_DIVISOR (MXSER_BAUD_BASE * 16)
-
-#define PCI_DEVICE_ID_MOXA_RC7000 0x0001
-#define PCI_DEVICE_ID_MOXA_CP102 0x1020
-#define PCI_DEVICE_ID_MOXA_CP102UL 0x1021
-#define PCI_DEVICE_ID_MOXA_CP102U 0x1022
-#define PCI_DEVICE_ID_MOXA_CP102UF 0x1023
-#define PCI_DEVICE_ID_MOXA_C104 0x1040
-#define PCI_DEVICE_ID_MOXA_CP104U 0x1041
-#define PCI_DEVICE_ID_MOXA_CP104JU 0x1042
-#define PCI_DEVICE_ID_MOXA_CP104EL 0x1043
-#define PCI_DEVICE_ID_MOXA_POS104UL 0x1044
-#define PCI_DEVICE_ID_MOXA_CB108 0x1080
-#define PCI_DEVICE_ID_MOXA_CP112UL 0x1120
-#define PCI_DEVICE_ID_MOXA_CT114 0x1140
-#define PCI_DEVICE_ID_MOXA_CP114 0x1141
-#define PCI_DEVICE_ID_MOXA_CB114 0x1142
-#define PCI_DEVICE_ID_MOXA_CP114UL 0x1143
-#define PCI_DEVICE_ID_MOXA_CP118U 0x1180
-#define PCI_DEVICE_ID_MOXA_CP118EL 0x1181
-#define PCI_DEVICE_ID_MOXA_CP132 0x1320
-#define PCI_DEVICE_ID_MOXA_CP132U 0x1321
-#define PCI_DEVICE_ID_MOXA_CP134U 0x1340
-#define PCI_DEVICE_ID_MOXA_CB134I 0x1341
-#define PCI_DEVICE_ID_MOXA_CP138U 0x1380
-#define PCI_DEVICE_ID_MOXA_C168 0x1680
-#define PCI_DEVICE_ID_MOXA_CP168U 0x1681
-#define PCI_DEVICE_ID_MOXA_CP168EL 0x1682
-
-#define MXSER_NPORTS(ddata) ((ddata) & 0xffU)
-#define MXSER_HIGHBAUD 0x0100
-
-enum mxser_must_hwid {
- MOXA_OTHER_UART = 0x00,
- MOXA_MUST_MU150_HWID = 0x01,
- MOXA_MUST_MU860_HWID = 0x02,
-};
-
-static const struct {
- u8 type;
- u8 fifo_size;
- u8 rx_high_water;
- u8 rx_low_water;
- speed_t max_baud;
-} Gpci_uart_info[] = {
- { MOXA_OTHER_UART, 16, 14, 1, 921600 },
- { MOXA_MUST_MU150_HWID, 64, 48, 16, 230400 },
- { MOXA_MUST_MU860_HWID, 128, 96, 32, 921600 }
-};
-#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
-
-static const struct pci_device_id mxser_pcibrds[] = {
- { PCI_DEVICE_DATA(MOXA, C168, 8) },
- { PCI_DEVICE_DATA(MOXA, C104, 4) },
- { PCI_DEVICE_DATA(MOXA, CP132, 2) },
- { PCI_DEVICE_DATA(MOXA, CP114, 4) },
- { PCI_DEVICE_DATA(MOXA, CT114, 4) },
- { PCI_DEVICE_DATA(MOXA, CP102, 2 | MXSER_HIGHBAUD) },
- { PCI_DEVICE_DATA(MOXA, CP104U, 4) },
- { PCI_DEVICE_DATA(MOXA, CP168U, 8) },
- { PCI_DEVICE_DATA(MOXA, CP132U, 2) },
- { PCI_DEVICE_DATA(MOXA, CP134U, 4) },
- { PCI_DEVICE_DATA(MOXA, CP104JU, 4) },
- { PCI_DEVICE_DATA(MOXA, RC7000, 8) }, /* RC7000 */
- { PCI_DEVICE_DATA(MOXA, CP118U, 8) },
- { PCI_DEVICE_DATA(MOXA, CP102UL, 2) },
- { PCI_DEVICE_DATA(MOXA, CP102U, 2) },
- { PCI_DEVICE_DATA(MOXA, CP118EL, 8) },
- { PCI_DEVICE_DATA(MOXA, CP168EL, 8) },
- { PCI_DEVICE_DATA(MOXA, CP104EL, 4) },
- { PCI_DEVICE_DATA(MOXA, CB108, 8) },
- { PCI_DEVICE_DATA(MOXA, CB114, 4) },
- { PCI_DEVICE_DATA(MOXA, CB134I, 4) },
- { PCI_DEVICE_DATA(MOXA, CP138U, 8) },
- { PCI_DEVICE_DATA(MOXA, POS104UL, 4) },
- { PCI_DEVICE_DATA(MOXA, CP114UL, 4) },
- { PCI_DEVICE_DATA(MOXA, CP102UF, 2) },
- { PCI_DEVICE_DATA(MOXA, CP112UL, 2) },
- { }
-};
-MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
-
-static int ttymajor = MXSERMAJOR;
-
-/* Variables for insmod */
-
-MODULE_AUTHOR("Casper Yang");
-MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
-module_param(ttymajor, int, 0);
-MODULE_LICENSE("GPL");
-
-struct mxser_board;
-
-struct mxser_port {
- struct tty_port port;
- struct mxser_board *board;
-
- unsigned long ioaddr;
- unsigned long opmode_ioaddr;
-
- u8 rx_high_water;
- u8 rx_low_water;
- int type; /* UART type */
-
- u8 x_char; /* xon/xoff character */
- u8 IER; /* Interrupt Enable Register */
- u8 MCR; /* Modem control register */
- u8 FCR; /* FIFO control register */
-
- struct async_icount icount; /* kernel counters for 4 input interrupts */
- unsigned int timeout;
-
- u8 read_status_mask;
- u8 ignore_status_mask;
- u8 xmit_fifo_size;
-
- spinlock_t slock;
-};
-
-struct mxser_board {
- unsigned int idx;
- unsigned short nports;
- int irq;
- unsigned long vector;
-
- enum mxser_must_hwid must_hwid;
- speed_t max_baud;
-
- struct mxser_port ports[] /* __counted_by(nports) */;
-};
-
-static DECLARE_BITMAP(mxser_boards, MXSER_BOARDS);
-static struct tty_driver *mxvar_sdriver;
-
-static u8 __mxser_must_set_EFR(unsigned long baseio, u8 clear, u8 set,
- bool restore_LCR)
-{
- u8 oldlcr, efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENHANCED, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~clear;
- efr |= set;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
-
- if (restore_LCR)
- outb(oldlcr, baseio + UART_LCR);
-
- return oldlcr;
-}
-
-static u8 mxser_must_select_bank(unsigned long baseio, u8 bank)
-{
- return __mxser_must_set_EFR(baseio, MOXA_MUST_EFR_BANK_MASK, bank,
- false);
-}
-
-static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
-{
- u8 oldlcr = mxser_must_select_bank(baseio, MOXA_MUST_EFR_BANK0);
- outb(value, baseio + MOXA_MUST_XON1_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
-{
- u8 oldlcr = mxser_must_select_bank(baseio, MOXA_MUST_EFR_BANK0);
- outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-static void mxser_set_must_fifo_value(struct mxser_port *info)
-{
- u8 oldlcr = mxser_must_select_bank(info->ioaddr, MOXA_MUST_EFR_BANK1);
- outb(info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
- outb(info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
- outb(info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
- outb(oldlcr, info->ioaddr + UART_LCR);
-}
-
-static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
-{
- u8 oldlcr = mxser_must_select_bank(baseio, MOXA_MUST_EFR_BANK2);
- outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-static u8 mxser_get_must_hardware_id(unsigned long baseio)
-{
- u8 oldlcr = mxser_must_select_bank(baseio, MOXA_MUST_EFR_BANK2);
- u8 id = inb(baseio + MOXA_MUST_HWID_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-
- return id;
-}
-
-static void mxser_must_set_EFR(unsigned long baseio, u8 clear, u8 set)
-{
- __mxser_must_set_EFR(baseio, clear, set, true);
-}
-
-static void mxser_must_set_enhance_mode(unsigned long baseio, bool enable)
-{
- mxser_must_set_EFR(baseio,
- enable ? 0 : MOXA_MUST_EFR_EFRB_ENABLE,
- enable ? MOXA_MUST_EFR_EFRB_ENABLE : 0);
-}
-
-static void mxser_must_no_sw_flow_control(unsigned long baseio)
-{
- mxser_must_set_EFR(baseio, MOXA_MUST_EFR_SF_MASK, 0);
-}
-
-static void mxser_must_set_tx_sw_flow_control(unsigned long baseio, bool enable)
-{
- mxser_must_set_EFR(baseio, MOXA_MUST_EFR_SF_TX_MASK,
- enable ? MOXA_MUST_EFR_SF_TX1 : 0);
-}
-
-static void mxser_must_set_rx_sw_flow_control(unsigned long baseio, bool enable)
-{
- mxser_must_set_EFR(baseio, MOXA_MUST_EFR_SF_RX_MASK,
- enable ? MOXA_MUST_EFR_SF_RX1 : 0);
-}
-
-static enum mxser_must_hwid mxser_must_get_hwid(unsigned long io)
-{
- u8 oldmcr, hwid;
- int i;
-
- outb(0, io + UART_LCR);
- mxser_must_set_enhance_mode(io, false);
- oldmcr = inb(io + UART_MCR);
- outb(0, io + UART_MCR);
- mxser_set_must_xon1_value(io, 0x11);
- if (inb(io + UART_MCR) != 0) {
- outb(oldmcr, io + UART_MCR);
- return MOXA_OTHER_UART;
- }
-
- hwid = mxser_get_must_hardware_id(io);
- for (i = 1; i < UART_INFO_NUM; i++) /* 0 = OTHER_UART */
- if (hwid == Gpci_uart_info[i].type)
- return hwid;
-
- return MOXA_OTHER_UART;
-}
-
-static bool mxser_16550A_or_MUST(struct mxser_port *info)
-{
- return info->type == PORT_16550A || info->board->must_hwid;
-}
-
-static void mxser_process_txrx_fifo(struct mxser_port *info)
-{
- unsigned int i;
-
- if (info->type == PORT_16450 || info->type == PORT_8250) {
- info->rx_high_water = 1;
- info->rx_low_water = 1;
- info->xmit_fifo_size = 1;
- return;
- }
-
- for (i = 0; i < UART_INFO_NUM; i++)
- if (info->board->must_hwid == Gpci_uart_info[i].type) {
- info->rx_low_water = Gpci_uart_info[i].rx_low_water;
- info->rx_high_water = Gpci_uart_info[i].rx_high_water;
- info->xmit_fifo_size = Gpci_uart_info[i].fifo_size;
- break;
- }
-}
-
-static void __mxser_start_tx(struct mxser_port *info)
-{
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
-}
-
-static void mxser_start_tx(struct mxser_port *info)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- __mxser_start_tx(info);
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-static void __mxser_stop_tx(struct mxser_port *info)
-{
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
-}
-
-static bool mxser_carrier_raised(struct tty_port *port)
-{
- struct mxser_port *mp = container_of(port, struct mxser_port, port);
-
- return inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD;
-}
-
-static void mxser_dtr_rts(struct tty_port *port, bool active)
-{
- struct mxser_port *mp = container_of(port, struct mxser_port, port);
- unsigned long flags;
- u8 mcr;
-
- spin_lock_irqsave(&mp->slock, flags);
- mcr = inb(mp->ioaddr + UART_MCR);
- if (active)
- mcr |= UART_MCR_DTR | UART_MCR_RTS;
- else
- mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
- outb(mcr, mp->ioaddr + UART_MCR);
- spin_unlock_irqrestore(&mp->slock, flags);
-}
-
-static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned int quot = 0, baud;
- unsigned char cval;
- u64 timeout;
-
- if (newspd > info->board->max_baud)
- return -1;
-
- if (newspd == 134) {
- quot = 2 * MXSER_BAUD_BASE / 269;
- tty_encode_baud_rate(tty, 134, 134);
- } else if (newspd) {
- quot = MXSER_BAUD_BASE / newspd;
- if (quot == 0)
- quot = 1;
- baud = MXSER_BAUD_BASE / quot;
- tty_encode_baud_rate(tty, baud, baud);
- } else {
- quot = 0;
- }
-
- /*
- * worst case (128 * 1000 * 10 * 18432) needs 35 bits, so divide in the
- * u64 domain
- */
- timeout = (u64)info->xmit_fifo_size * HZ * 10 * quot;
- do_div(timeout, MXSER_BAUD_BASE);
- info->timeout = timeout + HZ / 50; /* Add .02 seconds of slop */
-
- if (quot) {
- info->MCR |= UART_MCR_DTR;
- outb(info->MCR, info->ioaddr + UART_MCR);
- } else {
- info->MCR &= ~UART_MCR_DTR;
- outb(info->MCR, info->ioaddr + UART_MCR);
- return 0;
- }
-
- cval = inb(info->ioaddr + UART_LCR);
-
- outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
-
- outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
- outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
- outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
-
- if (C_BAUD(tty) == BOTHER) {
- quot = MXSER_BAUD_BASE % newspd;
- quot *= 8;
- if (quot % newspd > newspd / 2) {
- quot /= newspd;
- quot++;
- } else
- quot /= newspd;
-
- mxser_set_must_enum_value(info->ioaddr, quot);
- } else {
- mxser_set_must_enum_value(info->ioaddr, 0);
- }
-
- return 0;
-}
-
-static void mxser_handle_cts(struct tty_struct *tty, struct mxser_port *info,
- u8 msr)
-{
- bool cts = msr & UART_MSR_CTS;
-
- if (tty->hw_stopped) {
- if (cts) {
- tty->hw_stopped = false;
-
- if (!mxser_16550A_or_MUST(info))
- __mxser_start_tx(info);
- tty_wakeup(tty);
- }
- return;
- } else if (cts)
- return;
-
- tty->hw_stopped = true;
- if (!mxser_16550A_or_MUST(info))
- __mxser_stop_tx(info);
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void mxser_change_speed(struct tty_struct *tty,
- const struct ktermios *old_termios)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned cflag, cval;
-
- cflag = tty->termios.c_cflag;
-
- if (mxser_set_baud(tty, tty_get_baud_rate(tty))) {
- /* Use previous rate on a failure */
- if (old_termios) {
- speed_t baud = tty_termios_baud_rate(old_termios);
- tty_encode_baud_rate(tty, baud, baud);
- }
- }
-
- /* byte size and parity */
- cval = UART_LCR_WLEN(tty_get_char_size(tty->termios.c_cflag));
-
- if (cflag & CSTOPB)
- cval |= UART_LCR_STOP;
- if (cflag & PARENB)
- cval |= UART_LCR_PARITY;
- if (!(cflag & PARODD))
- cval |= UART_LCR_EPAR;
- if (cflag & CMSPAR)
- cval |= UART_LCR_SPAR;
-
- info->FCR = 0;
- if (info->board->must_hwid) {
- info->FCR |= UART_FCR_ENABLE_FIFO |
- MOXA_MUST_FCR_GDA_MODE_ENABLE;
- mxser_set_must_fifo_value(info);
- } else if (info->type != PORT_8250 && info->type != PORT_16450) {
- info->FCR |= UART_FCR_ENABLE_FIFO;
- switch (info->rx_high_water) {
- case 1:
- info->FCR |= UART_FCR_TRIGGER_1;
- break;
- case 4:
- info->FCR |= UART_FCR_TRIGGER_4;
- break;
- case 8:
- info->FCR |= UART_FCR_TRIGGER_8;
- break;
- default:
- info->FCR |= UART_FCR_TRIGGER_14;
- break;
- }
- }
-
- /* CTS flow control flag and modem status interrupts */
- info->IER &= ~UART_IER_MSI;
- info->MCR &= ~UART_MCR_AFE;
- tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
- if (cflag & CRTSCTS) {
- info->IER |= UART_IER_MSI;
- if (mxser_16550A_or_MUST(info)) {
- info->MCR |= UART_MCR_AFE;
- } else {
- mxser_handle_cts(tty, info,
- inb(info->ioaddr + UART_MSR));
- }
- }
- outb(info->MCR, info->ioaddr + UART_MCR);
- tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
- if (~cflag & CLOCAL)
- info->IER |= UART_IER_MSI;
- outb(info->IER, info->ioaddr + UART_IER);
-
- /*
- * Set up parity check flag
- */
- info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
- if (I_INPCK(tty))
- info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (I_BRKINT(tty) || I_PARMRK(tty))
- info->read_status_mask |= UART_LSR_BI;
-
- info->ignore_status_mask = 0;
-
- if (I_IGNBRK(tty)) {
- info->ignore_status_mask |= UART_LSR_BI;
- info->read_status_mask |= UART_LSR_BI;
- /*
- * If we're ignore parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(tty)) {
- info->ignore_status_mask |=
- UART_LSR_OE |
- UART_LSR_PE |
- UART_LSR_FE;
- info->read_status_mask |=
- UART_LSR_OE |
- UART_LSR_PE |
- UART_LSR_FE;
- }
- }
- if (info->board->must_hwid) {
- mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
- mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
- mxser_must_set_rx_sw_flow_control(info->ioaddr, I_IXON(tty));
- mxser_must_set_tx_sw_flow_control(info->ioaddr, I_IXOFF(tty));
- }
-
-
- outb(info->FCR, info->ioaddr + UART_FCR);
- outb(cval, info->ioaddr + UART_LCR);
-}
-
-static u8 mxser_check_modem_status(struct tty_struct *tty,
- struct mxser_port *port)
-{
- u8 msr = inb(port->ioaddr + UART_MSR);
-
- if (!(msr & UART_MSR_ANY_DELTA))
- return msr;
-
- /* update input line counters */
- if (msr & UART_MSR_TERI)
- port->icount.rng++;
- if (msr & UART_MSR_DDSR)
- port->icount.dsr++;
- if (msr & UART_MSR_DDCD)
- port->icount.dcd++;
- if (msr & UART_MSR_DCTS)
- port->icount.cts++;
- wake_up_interruptible(&port->port.delta_msr_wait);
-
- if (tty_port_check_carrier(&port->port) && (msr & UART_MSR_DDCD)) {
- if (msr & UART_MSR_DCD)
- wake_up_interruptible(&port->port.open_wait);
- }
-
- if (tty_port_cts_enabled(&port->port))
- mxser_handle_cts(tty, port, msr);
-
- return msr;
-}
-
-static void mxser_disable_and_clear_FIFO(struct mxser_port *info)
-{
- u8 fcr = UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT;
-
- if (info->board->must_hwid)
- fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
-
- outb(fcr, info->ioaddr + UART_FCR);
-}
-
-static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
-{
- struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long flags;
- int ret;
-
- ret = tty_port_alloc_xmit_buf(port);
- if (ret < 0)
- return ret;
-
- spin_lock_irqsave(&info->slock, flags);
-
- if (!info->type) {
- set_bit(TTY_IO_ERROR, &tty->flags);
- spin_unlock_irqrestore(&info->slock, flags);
- ret = 0;
- goto err_free_xmit;
- }
-
- /*
- * Clear the FIFO buffers and disable them
- * (they will be reenabled in mxser_change_speed())
- */
- mxser_disable_and_clear_FIFO(info);
-
- /*
- * At this point there's no way the LSR could still be 0xFF;
- * if it is, then bail out, because there's likely no UART
- * here.
- */
- if (inb(info->ioaddr + UART_LSR) == 0xff) {
- spin_unlock_irqrestore(&info->slock, flags);
- if (capable(CAP_SYS_ADMIN)) {
- set_bit(TTY_IO_ERROR, &tty->flags);
- return 0;
- }
-
- ret = -ENODEV;
- goto err_free_xmit;
- }
-
- /*
- * Clear the interrupt registers.
- */
- (void) inb(info->ioaddr + UART_LSR);
- (void) inb(info->ioaddr + UART_RX);
- (void) inb(info->ioaddr + UART_IIR);
- (void) inb(info->ioaddr + UART_MSR);
-
- /*
- * Now, initialize the UART
- */
- outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
- info->MCR = UART_MCR_DTR | UART_MCR_RTS;
- outb(info->MCR, info->ioaddr + UART_MCR);
-
- /*
- * Finally, enable interrupts
- */
- info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
-
- if (info->board->must_hwid)
- info->IER |= MOXA_MUST_IER_EGDAI;
- outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
-
- /*
- * And clear the interrupt registers again for luck.
- */
- (void) inb(info->ioaddr + UART_LSR);
- (void) inb(info->ioaddr + UART_RX);
- (void) inb(info->ioaddr + UART_IIR);
- (void) inb(info->ioaddr + UART_MSR);
-
- clear_bit(TTY_IO_ERROR, &tty->flags);
- kfifo_reset(&port->xmit_fifo);
-
- /*
- * and set the speed of the serial port
- */
- mxser_change_speed(tty, NULL);
- spin_unlock_irqrestore(&info->slock, flags);
-
- return 0;
-err_free_xmit:
- tty_port_free_xmit_buf(port);
- return ret;
-}
-
-/*
- * To stop accepting input, we disable the receive line status interrupts, and
- * tell the interrupt driver to stop checking the data ready bit in the line
- * status register.
- */
-static void mxser_stop_rx(struct mxser_port *info)
-{
- info->IER &= ~UART_IER_RLSI;
- if (info->board->must_hwid)
- info->IER &= ~MOXA_MUST_RECV_ISR;
-
- outb(info->IER, info->ioaddr + UART_IER);
-}
-
-/*
- * This routine will shutdown a serial port
- */
-static void mxser_shutdown_port(struct tty_port *port)
-{
- struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
-
- mxser_stop_rx(info);
-
- /*
- * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
- * here so the queue might never be waken up
- */
- wake_up_interruptible(&info->port.delta_msr_wait);
-
- info->IER = 0;
- outb(0x00, info->ioaddr + UART_IER);
-
- /* clear Rx/Tx FIFO's */
- mxser_disable_and_clear_FIFO(info);
-
- /* read data port to reset things */
- (void) inb(info->ioaddr + UART_RX);
-
-
- if (info->board->must_hwid)
- mxser_must_no_sw_flow_control(info->ioaddr);
-
- spin_unlock_irqrestore(&info->slock, flags);
-
- /* make sure ISR is not running while we free the buffer */
- synchronize_irq(info->board->irq);
-
- tty_port_free_xmit_buf(port);
-}
-
-/*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port, linking in its async structure into
- * the IRQ chain. It also performs the serial-specific
- * initialization for the tty structure.
- */
-static int mxser_open(struct tty_struct *tty, struct file *filp)
-{
- struct tty_port *tport = tty->port;
- struct mxser_port *port = container_of(tport, struct mxser_port, port);
-
- tty->driver_data = port;
-
- return tty_port_open(tport, tty, filp);
-}
-
-static void mxser_flush_buffer(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- kfifo_reset(&info->port.xmit_fifo);
-
- outb(info->FCR | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
- info->ioaddr + UART_FCR);
-
- spin_unlock_irqrestore(&info->slock, flags);
-
- tty_wakeup(tty);
-}
-
-static void mxser_close(struct tty_struct *tty, struct file *filp)
-{
- tty_port_close(tty->port, tty, filp);
-}
-
-static ssize_t mxser_write(struct tty_struct *tty, const u8 *buf, size_t count)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
- size_t written;
- bool is_empty;
-
- spin_lock_irqsave(&info->slock, flags);
- written = kfifo_in(&info->port.xmit_fifo, buf, count);
- is_empty = kfifo_is_empty(&info->port.xmit_fifo);
- spin_unlock_irqrestore(&info->slock, flags);
-
- if (!is_empty && !tty->flow.stopped)
- if (!tty->hw_stopped || mxser_16550A_or_MUST(info))
- mxser_start_tx(info);
-
- return written;
-}
-
-static int mxser_put_char(struct tty_struct *tty, u8 ch)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&info->slock, flags);
- ret = kfifo_put(&info->port.xmit_fifo, ch);
- spin_unlock_irqrestore(&info->slock, flags);
-
- return ret;
-}
-
-
-static void mxser_flush_chars(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- if (kfifo_is_empty(&info->port.xmit_fifo) || tty->flow.stopped ||
- (tty->hw_stopped && !mxser_16550A_or_MUST(info)))
- return;
-
- mxser_start_tx(info);
-}
-
-static unsigned int mxser_write_room(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- return kfifo_avail(&info->port.xmit_fifo);
-}
-
-static unsigned int mxser_chars_in_buffer(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- return kfifo_len(&info->port.xmit_fifo);
-}
-
-/*
- * ------------------------------------------------------------
- * friends of mxser_ioctl()
- * ------------------------------------------------------------
- */
-static int mxser_get_serial_info(struct tty_struct *tty,
- struct serial_struct *ss)
-{
- struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
- unsigned int closing_wait, close_delay;
-
- mutex_lock(&port->mutex);
-
- close_delay = jiffies_to_msecs(info->port.close_delay) / 10;
- closing_wait = info->port.closing_wait;
- if (closing_wait != ASYNC_CLOSING_WAIT_NONE)
- closing_wait = jiffies_to_msecs(closing_wait) / 10;
-
- ss->type = info->type;
- ss->line = tty->index;
- ss->port = info->ioaddr;
- ss->irq = info->board->irq;
- ss->flags = info->port.flags;
- ss->baud_base = MXSER_BAUD_BASE;
- ss->close_delay = close_delay;
- ss->closing_wait = closing_wait;
- ss->custom_divisor = MXSER_CUSTOM_DIVISOR;
- mutex_unlock(&port->mutex);
- return 0;
-}
-
-static int mxser_set_serial_info(struct tty_struct *tty,
- struct serial_struct *ss)
-{
- struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
- speed_t baud;
- unsigned long sl_flags;
- unsigned int old_speed, close_delay, closing_wait;
- int retval = 0;
-
- if (tty_io_error(tty))
- return -EIO;
-
- mutex_lock(&port->mutex);
-
- if (ss->irq != info->board->irq ||
- ss->port != info->ioaddr) {
- mutex_unlock(&port->mutex);
- return -EINVAL;
- }
-
- old_speed = port->flags & ASYNC_SPD_MASK;
-
- close_delay = msecs_to_jiffies(ss->close_delay * 10);
- closing_wait = ss->closing_wait;
- if (closing_wait != ASYNC_CLOSING_WAIT_NONE)
- closing_wait = msecs_to_jiffies(closing_wait * 10);
-
- if (!capable(CAP_SYS_ADMIN)) {
- if ((ss->baud_base != MXSER_BAUD_BASE) ||
- (close_delay != port->close_delay) ||
- (closing_wait != port->closing_wait) ||
- ((ss->flags & ~ASYNC_USR_MASK) != (port->flags & ~ASYNC_USR_MASK))) {
- mutex_unlock(&port->mutex);
- return -EPERM;
- }
- port->flags = (port->flags & ~ASYNC_USR_MASK) |
- (ss->flags & ASYNC_USR_MASK);
- } else {
- /*
- * OK, past this point, all the error checking has been done.
- * At this point, we start making changes.....
- */
- port->flags = ((port->flags & ~ASYNC_FLAGS) |
- (ss->flags & ASYNC_FLAGS));
- port->close_delay = close_delay;
- port->closing_wait = closing_wait;
- if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
- (ss->baud_base != MXSER_BAUD_BASE ||
- ss->custom_divisor !=
- MXSER_CUSTOM_DIVISOR)) {
- if (ss->custom_divisor == 0) {
- mutex_unlock(&port->mutex);
- return -EINVAL;
- }
- baud = ss->baud_base / ss->custom_divisor;
- tty_encode_baud_rate(tty, baud, baud);
- }
-
- info->type = ss->type;
-
- mxser_process_txrx_fifo(info);
- }
-
- if (tty_port_initialized(port)) {
- if (old_speed != (port->flags & ASYNC_SPD_MASK)) {
- spin_lock_irqsave(&info->slock, sl_flags);
- mxser_change_speed(tty, NULL);
- spin_unlock_irqrestore(&info->slock, sl_flags);
- }
- } else {
- retval = mxser_activate(port, tty);
- if (retval == 0)
- tty_port_set_initialized(port, true);
- }
- mutex_unlock(&port->mutex);
- return retval;
-}
-
-/*
- * mxser_get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
-static int mxser_get_lsr_info(struct mxser_port *info,
- unsigned int __user *value)
-{
- unsigned char status;
- unsigned int result;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- status = inb(info->ioaddr + UART_LSR);
- spin_unlock_irqrestore(&info->slock, flags);
- result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
- return put_user(result, value);
-}
-
-static int mxser_tiocmget(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned char control;
- unsigned long flags;
- u8 msr;
-
- if (tty_io_error(tty))
- return -EIO;
-
- spin_lock_irqsave(&info->slock, flags);
- control = info->MCR;
- msr = mxser_check_modem_status(tty, info);
- spin_unlock_irqrestore(&info->slock, flags);
-
- return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
- ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
- ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) |
- ((msr & UART_MSR_RI) ? TIOCM_RNG : 0) |
- ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0) |
- ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0);
-}
-
-static int mxser_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- if (tty_io_error(tty))
- return -EIO;
-
- spin_lock_irqsave(&info->slock, flags);
-
- if (set & TIOCM_RTS)
- info->MCR |= UART_MCR_RTS;
- if (set & TIOCM_DTR)
- info->MCR |= UART_MCR_DTR;
-
- if (clear & TIOCM_RTS)
- info->MCR &= ~UART_MCR_RTS;
- if (clear & TIOCM_DTR)
- info->MCR &= ~UART_MCR_DTR;
-
- outb(info->MCR, info->ioaddr + UART_MCR);
- spin_unlock_irqrestore(&info->slock, flags);
- return 0;
-}
-
-static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
- struct async_icount *cprev)
-{
- struct async_icount cnow;
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount; /* atomic copy */
- spin_unlock_irqrestore(&info->slock, flags);
-
- ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
- ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
- ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
- ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
-
- *cprev = cnow;
-
- return ret;
-}
-
-/* We should likely switch to TIOCGRS485/TIOCSRS485. */
-static int mxser_ioctl_op_mode(struct mxser_port *port, int index, bool set,
- int __user *u_opmode)
-{
- int opmode, p = index % 4;
- int shiftbit = p * 2;
- u8 val;
-
- if (port->board->must_hwid != MOXA_MUST_MU860_HWID)
- return -EFAULT;
-
- if (set) {
- if (get_user(opmode, u_opmode))
- return -EFAULT;
-
- if (opmode & ~OP_MODE_MASK)
- return -EINVAL;
-
- spin_lock_irq(&port->slock);
- val = inb(port->opmode_ioaddr);
- val &= ~(OP_MODE_MASK << shiftbit);
- val |= (opmode << shiftbit);
- outb(val, port->opmode_ioaddr);
- spin_unlock_irq(&port->slock);
-
- return 0;
- }
-
- spin_lock_irq(&port->slock);
- opmode = inb(port->opmode_ioaddr) >> shiftbit;
- spin_unlock_irq(&port->slock);
-
- return put_user(opmode & OP_MODE_MASK, u_opmode);
-}
-
-static int mxser_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct mxser_port *info = tty->driver_data;
- struct async_icount cnow;
- unsigned long flags;
- void __user *argp = (void __user *)arg;
-
- if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE)
- return mxser_ioctl_op_mode(info, tty->index,
- cmd == MOXA_SET_OP_MODE, argp);
-
- if (cmd != TIOCMIWAIT && tty_io_error(tty))
- return -EIO;
-
- switch (cmd) {
- case TIOCSERGETLSR: /* Get line status register */
- return mxser_get_lsr_info(info, argp);
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
- * - mask passed in arg for lines of interest
- * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
- * Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount; /* note the counters on entry */
- spin_unlock_irqrestore(&info->slock, flags);
-
- return wait_event_interruptible(info->port.delta_msr_wait,
- mxser_cflags_changed(info, arg, &cnow));
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
-
-static int mxser_get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-
-{
- struct mxser_port *info = tty->driver_data;
- struct async_icount cnow;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->slock, flags);
-
- icount->frame = cnow.frame;
- icount->brk = cnow.brk;
- icount->overrun = cnow.overrun;
- icount->buf_overrun = cnow.buf_overrun;
- icount->parity = cnow.parity;
- icount->rx = cnow.rx;
- icount->tx = cnow.tx;
- icount->cts = cnow.cts;
- icount->dsr = cnow.dsr;
- icount->rng = cnow.rng;
- icount->dcd = cnow.dcd;
- return 0;
-}
-
-/*
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- */
-static void mxser_throttle(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- if (I_IXOFF(tty)) {
- if (info->board->must_hwid) {
- info->IER &= ~MOXA_MUST_RECV_ISR;
- outb(info->IER, info->ioaddr + UART_IER);
- } else {
- info->x_char = STOP_CHAR(tty);
- outb(0, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- }
-
- if (C_CRTSCTS(tty)) {
- info->MCR &= ~UART_MCR_RTS;
- outb(info->MCR, info->ioaddr + UART_MCR);
- }
-}
-
-static void mxser_unthrottle(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- /* startrx */
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else {
- if (info->board->must_hwid) {
- info->IER |= MOXA_MUST_RECV_ISR;
- outb(info->IER, info->ioaddr + UART_IER);
- } else {
- info->x_char = START_CHAR(tty);
- outb(0, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- }
- }
-
- if (C_CRTSCTS(tty)) {
- info->MCR |= UART_MCR_RTS;
- outb(info->MCR, info->ioaddr + UART_MCR);
- }
-}
-
-/*
- * mxser_stop() and mxser_start()
- *
- * This routines are called before setting or resetting tty->flow.stopped.
- * They enable or disable transmitter interrupts, as necessary.
- */
-static void mxser_stop(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- if (info->IER & UART_IER_THRI)
- __mxser_stop_tx(info);
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-static void mxser_start(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- if (!kfifo_is_empty(&info->port.xmit_fifo))
- __mxser_start_tx(info);
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-static void mxser_set_termios(struct tty_struct *tty,
- const struct ktermios *old_termios)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- mxser_change_speed(tty, old_termios);
- spin_unlock_irqrestore(&info->slock, flags);
-
- if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
- tty->hw_stopped = false;
- mxser_start(tty);
- }
-
- /* Handle sw stopped */
- if ((old_termios->c_iflag & IXON) && !I_IXON(tty)) {
- tty->flow.stopped = 0;
-
- if (info->board->must_hwid) {
- spin_lock_irqsave(&info->slock, flags);
- mxser_must_set_rx_sw_flow_control(info->ioaddr, false);
- spin_unlock_irqrestore(&info->slock, flags);
- }
-
- mxser_start(tty);
- }
-}
-
-static bool mxser_tx_empty(struct mxser_port *info)
-{
- unsigned long flags;
- u8 lsr;
-
- spin_lock_irqsave(&info->slock, flags);
- lsr = inb(info->ioaddr + UART_LSR);
- spin_unlock_irqrestore(&info->slock, flags);
-
- return !(lsr & UART_LSR_TEMT);
-}
-
-/*
- * mxser_wait_until_sent() --- wait until the transmitter is empty
- */
-static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long expire, char_time;
-
- if (info->type == PORT_UNKNOWN)
- return;
-
- if (info->xmit_fifo_size == 0)
- return; /* Just in case.... */
-
- /*
- * Set the check interval to be 1/5 of the estimated time to
- * send a single character, and make it at least 1. The check
- * interval should also be less than the timeout.
- *
- * Note: we have to use pretty tight timings here to satisfy
- * the NIST-PCTS.
- */
- char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
- char_time = char_time / 5;
- if (char_time == 0)
- char_time = 1;
- if (timeout && timeout < char_time)
- char_time = timeout;
-
- char_time = jiffies_to_msecs(char_time);
-
- /*
- * If the transmitter hasn't cleared in twice the approximate
- * amount of time to send the entire FIFO, it probably won't
- * ever clear. This assumes the UART isn't doing flow
- * control, which is currently the case. Hence, if it ever
- * takes longer than info->timeout, this is probably due to a
- * UART bug of some kind. So, we clamp the timeout parameter at
- * 2*info->timeout.
- */
- if (!timeout || timeout > 2 * info->timeout)
- timeout = 2 * info->timeout;
-
- expire = jiffies + timeout;
-
- while (mxser_tx_empty(info)) {
- msleep_interruptible(char_time);
- if (signal_pending(current))
- break;
- if (time_after(jiffies, expire))
- break;
- }
-}
-
-/*
- * This routine is called by tty_hangup() when a hangup is signaled.
- */
-static void mxser_hangup(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- mxser_flush_buffer(tty);
- tty_port_hangup(&info->port);
-}
-
-/*
- * mxser_rs_break() --- routine which turns the break handling on or off
- */
-static int mxser_rs_break(struct tty_struct *tty, int break_state)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
- u8 lcr;
-
- spin_lock_irqsave(&info->slock, flags);
- lcr = inb(info->ioaddr + UART_LCR);
- if (break_state == -1)
- lcr |= UART_LCR_SBC;
- else
- lcr &= ~UART_LCR_SBC;
- outb(lcr, info->ioaddr + UART_LCR);
- spin_unlock_irqrestore(&info->slock, flags);
-
- return 0;
-}
-
-static bool mxser_receive_chars_new(struct mxser_port *port, u8 status)
-{
- enum mxser_must_hwid hwid = port->board->must_hwid;
- u8 gdl;
-
- if (hwid == MOXA_OTHER_UART)
- return false;
- if (status & (UART_LSR_BRK_ERROR_BITS | MOXA_MUST_LSR_RERR))
- return false;
-
- gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
- if (hwid == MOXA_MUST_MU150_HWID)
- gdl &= MOXA_MUST_GDL_MASK;
-
- while (gdl--) {
- u8 ch = inb(port->ioaddr + UART_RX);
- if (!tty_insert_flip_char(&port->port, ch, 0))
- port->icount.buf_overrun++;
- }
-
- return true;
-}
-
-static u8 mxser_receive_chars_old(struct tty_struct *tty,
- struct mxser_port *port, u8 status)
-{
- enum mxser_must_hwid hwid = port->board->must_hwid;
- int ignored = 0;
- int max = 256;
- u8 ch;
-
- do {
- if (max-- < 0)
- break;
-
- ch = inb(port->ioaddr + UART_RX);
- if (hwid && (status & UART_LSR_OE))
- outb(port->FCR | UART_FCR_CLEAR_RCVR,
- port->ioaddr + UART_FCR);
- status &= port->read_status_mask;
- if (status & port->ignore_status_mask) {
- if (++ignored > 100)
- break;
- } else {
- u8 flag = 0;
- if (status & UART_LSR_BRK_ERROR_BITS) {
- if (status & UART_LSR_BI) {
- flag = TTY_BREAK;
- port->icount.brk++;
-
- if (port->port.flags & ASYNC_SAK)
- do_SAK(tty);
- } else if (status & UART_LSR_PE) {
- flag = TTY_PARITY;
- port->icount.parity++;
- } else if (status & UART_LSR_FE) {
- flag = TTY_FRAME;
- port->icount.frame++;
- } else if (status & UART_LSR_OE) {
- flag = TTY_OVERRUN;
- port->icount.overrun++;
- }
- }
- if (!tty_insert_flip_char(&port->port, ch, flag)) {
- port->icount.buf_overrun++;
- break;
- }
- }
-
- if (hwid)
- break;
-
- status = inb(port->ioaddr + UART_LSR);
- } while (status & UART_LSR_DR);
-
- return status;
-}
-
-static u8 mxser_receive_chars(struct tty_struct *tty,
- struct mxser_port *port, u8 status)
-{
- if (!mxser_receive_chars_new(port, status))
- status = mxser_receive_chars_old(tty, port, status);
-
- tty_flip_buffer_push(&port->port);
-
- return status;
-}
-
-static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
-{
- int count;
-
- if (port->x_char) {
- outb(port->x_char, port->ioaddr + UART_TX);
- port->x_char = 0;
- port->icount.tx++;
- return;
- }
-
- if (kfifo_is_empty(&port->port.xmit_fifo) || tty->flow.stopped ||
- (tty->hw_stopped && !mxser_16550A_or_MUST(port))) {
- __mxser_stop_tx(port);
- return;
- }
-
- count = port->xmit_fifo_size;
- do {
- u8 c;
-
- if (!kfifo_get(&port->port.xmit_fifo, &c))
- break;
-
- outb(c, port->ioaddr + UART_TX);
- port->icount.tx++;
- } while (--count > 0);
-
- if (kfifo_len(&port->port.xmit_fifo) < WAKEUP_CHARS)
- tty_wakeup(tty);
-
- if (kfifo_is_empty(&port->port.xmit_fifo))
- __mxser_stop_tx(port);
-}
-
-static bool mxser_port_isr(struct mxser_port *port)
-{
- struct tty_struct *tty;
- u8 iir, status;
- bool error = false;
-
- iir = inb(port->ioaddr + UART_IIR);
- if (iir & UART_IIR_NO_INT)
- return true;
-
- iir &= MOXA_MUST_IIR_MASK;
- tty = tty_port_tty_get(&port->port);
- if (!tty) {
- status = inb(port->ioaddr + UART_LSR);
- outb(port->FCR | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
- port->ioaddr + UART_FCR);
- inb(port->ioaddr + UART_MSR);
-
- error = true;
- goto put_tty;
- }
-
- status = inb(port->ioaddr + UART_LSR);
-
- if (port->board->must_hwid) {
- if (iir == MOXA_MUST_IIR_GDA ||
- iir == MOXA_MUST_IIR_RDA ||
- iir == MOXA_MUST_IIR_RTO ||
- iir == MOXA_MUST_IIR_LSR)
- status = mxser_receive_chars(tty, port, status);
- } else {
- status &= port->read_status_mask;
- if (status & UART_LSR_DR)
- status = mxser_receive_chars(tty, port, status);
- }
-
- mxser_check_modem_status(tty, port);
-
- if (port->board->must_hwid) {
- if (iir == 0x02 && (status & UART_LSR_THRE))
- mxser_transmit_chars(tty, port);
- } else {
- if (status & UART_LSR_THRE)
- mxser_transmit_chars(tty, port);
- }
-
-put_tty:
- tty_kref_put(tty);
-
- return error;
-}
-
-/*
- * This is the serial driver's generic interrupt routine
- */
-static irqreturn_t mxser_interrupt(int irq, void *dev_id)
-{
- struct mxser_board *brd = dev_id;
- struct mxser_port *port;
- unsigned int int_cnt, pass_counter = 0;
- unsigned int i, max = brd->nports;
- int handled = IRQ_NONE;
- u8 irqbits, bits, mask = BIT(max) - 1;
-
- while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
- irqbits = inb(brd->vector) & mask;
- if (irqbits == mask)
- break;
-
- handled = IRQ_HANDLED;
- for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
- if (irqbits == mask)
- break;
- if (bits & irqbits)
- continue;
- port = &brd->ports[i];
-
- int_cnt = 0;
- spin_lock(&port->slock);
- do {
- if (mxser_port_isr(port))
- break;
- } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
- spin_unlock(&port->slock);
- }
- }
-
- return handled;
-}
-
-static const struct tty_operations mxser_ops = {
- .open = mxser_open,
- .close = mxser_close,
- .write = mxser_write,
- .put_char = mxser_put_char,
- .flush_chars = mxser_flush_chars,
- .write_room = mxser_write_room,
- .chars_in_buffer = mxser_chars_in_buffer,
- .flush_buffer = mxser_flush_buffer,
- .ioctl = mxser_ioctl,
- .throttle = mxser_throttle,
- .unthrottle = mxser_unthrottle,
- .set_termios = mxser_set_termios,
- .stop = mxser_stop,
- .start = mxser_start,
- .hangup = mxser_hangup,
- .break_ctl = mxser_rs_break,
- .wait_until_sent = mxser_wait_until_sent,
- .tiocmget = mxser_tiocmget,
- .tiocmset = mxser_tiocmset,
- .set_serial = mxser_set_serial_info,
- .get_serial = mxser_get_serial_info,
- .get_icount = mxser_get_icount,
-};
-
-static const struct tty_port_operations mxser_port_ops = {
- .carrier_raised = mxser_carrier_raised,
- .dtr_rts = mxser_dtr_rts,
- .activate = mxser_activate,
- .shutdown = mxser_shutdown_port,
-};
-
-/*
- * The MOXA Smartio/Industio serial driver boot-time initialization code!
- */
-
-static void mxser_initbrd(struct mxser_board *brd, bool high_baud)
-{
- struct mxser_port *info;
- unsigned int i;
- bool is_mu860;
-
- brd->must_hwid = mxser_must_get_hwid(brd->ports[0].ioaddr);
- is_mu860 = brd->must_hwid == MOXA_MUST_MU860_HWID;
-
- for (i = 0; i < UART_INFO_NUM; i++) {
- if (Gpci_uart_info[i].type == brd->must_hwid) {
- brd->max_baud = Gpci_uart_info[i].max_baud;
-
- /* exception....CP-102 */
- if (high_baud)
- brd->max_baud = 921600;
- break;
- }
- }
-
- if (is_mu860) {
- /* set to RS232 mode by default */
- outb(0, brd->vector + 4);
- outb(0, brd->vector + 0x0c);
- }
-
- for (i = 0; i < brd->nports; i++) {
- info = &brd->ports[i];
- if (is_mu860) {
- if (i < 4)
- info->opmode_ioaddr = brd->vector + 4;
- else
- info->opmode_ioaddr = brd->vector + 0x0c;
- }
- tty_port_init(&info->port);
- info->port.ops = &mxser_port_ops;
- info->board = brd;
-
- /* Enhance mode enabled here */
- if (brd->must_hwid != MOXA_OTHER_UART)
- mxser_must_set_enhance_mode(info->ioaddr, true);
-
- info->type = PORT_16550A;
-
- mxser_process_txrx_fifo(info);
-
- spin_lock_init(&info->slock);
-
- /* before set INT ISR, disable all int */
- outb(inb(info->ioaddr + UART_IER) & 0xf0,
- info->ioaddr + UART_IER);
- }
-}
-
-static int mxser_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- struct mxser_board *brd;
- unsigned int i, base;
- unsigned long ioaddress;
- unsigned short nports = MXSER_NPORTS(ent->driver_data);
- struct device *tty_dev;
- int retval = -EINVAL;
-
- i = find_first_zero_bit(mxser_boards, MXSER_BOARDS);
- if (i >= MXSER_BOARDS) {
- dev_err(&pdev->dev, "too many boards found (maximum %d), board "
- "not configured\n", MXSER_BOARDS);
- goto err;
- }
-
- brd = devm_kzalloc(&pdev->dev, struct_size(brd, ports, nports),
- GFP_KERNEL);
- if (!brd)
- goto err;
-
- brd->idx = i;
- __set_bit(brd->idx, mxser_boards);
- base = i * MXSER_PORTS_PER_BOARD;
-
- retval = pcim_enable_device(pdev);
- if (retval) {
- dev_err(&pdev->dev, "PCI enable failed\n");
- goto err_zero;
- }
-
- /* io address */
- ioaddress = pci_resource_start(pdev, 2);
- retval = pci_request_region(pdev, 2, "mxser(IO)");
- if (retval)
- goto err_zero;
-
- brd->nports = nports;
- for (i = 0; i < nports; i++)
- brd->ports[i].ioaddr = ioaddress + 8 * i;
-
- /* vector */
- ioaddress = pci_resource_start(pdev, 3);
- retval = pci_request_region(pdev, 3, "mxser(vector)");
- if (retval)
- goto err_zero;
- brd->vector = ioaddress;
-
- /* irq */
- brd->irq = pdev->irq;
-
- mxser_initbrd(brd, ent->driver_data & MXSER_HIGHBAUD);
-
- retval = devm_request_irq(&pdev->dev, brd->irq, mxser_interrupt,
- IRQF_SHARED, "mxser", brd);
- if (retval) {
- dev_err(&pdev->dev, "request irq failed");
- goto err_relbrd;
- }
-
- for (i = 0; i < nports; i++) {
- tty_dev = tty_port_register_device(&brd->ports[i].port,
- mxvar_sdriver, base + i, &pdev->dev);
- if (IS_ERR(tty_dev)) {
- retval = PTR_ERR(tty_dev);
- for (; i > 0; i--)
- tty_unregister_device(mxvar_sdriver,
- base + i - 1);
- goto err_relbrd;
- }
- }
-
- pci_set_drvdata(pdev, brd);
-
- return 0;
-err_relbrd:
- for (i = 0; i < nports; i++)
- tty_port_destroy(&brd->ports[i].port);
-err_zero:
- __clear_bit(brd->idx, mxser_boards);
-err:
- return retval;
-}
-
-static void mxser_remove(struct pci_dev *pdev)
-{
- struct mxser_board *brd = pci_get_drvdata(pdev);
- unsigned int i, base = brd->idx * MXSER_PORTS_PER_BOARD;
-
- for (i = 0; i < brd->nports; i++) {
- tty_unregister_device(mxvar_sdriver, base + i);
- tty_port_destroy(&brd->ports[i].port);
- }
-
- __clear_bit(brd->idx, mxser_boards);
-}
-
-static struct pci_driver mxser_driver = {
- .name = "mxser",
- .id_table = mxser_pcibrds,
- .probe = mxser_probe,
- .remove = mxser_remove
-};
-
-static int __init mxser_module_init(void)
-{
- int retval;
-
- mxvar_sdriver = tty_alloc_driver(MXSER_PORTS, TTY_DRIVER_REAL_RAW |
- TTY_DRIVER_DYNAMIC_DEV);
- if (IS_ERR(mxvar_sdriver))
- return PTR_ERR(mxvar_sdriver);
-
- /* Initialize the tty_driver structure */
- mxvar_sdriver->name = "ttyMI";
- mxvar_sdriver->major = ttymajor;
- mxvar_sdriver->minor_start = 0;
- mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
- mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
- mxvar_sdriver->init_termios = tty_std_termios;
- mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
- tty_set_operations(mxvar_sdriver, &mxser_ops);
-
- retval = tty_register_driver(mxvar_sdriver);
- if (retval) {
- printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
- "tty driver !\n");
- goto err_put;
- }
-
- retval = pci_register_driver(&mxser_driver);
- if (retval) {
- printk(KERN_ERR "mxser: can't register pci driver\n");
- goto err_unr;
- }
-
- return 0;
-err_unr:
- tty_unregister_driver(mxvar_sdriver);
-err_put:
- tty_driver_kref_put(mxvar_sdriver);
- return retval;
-}
-
-static void __exit mxser_module_exit(void)
-{
- pci_unregister_driver(&mxser_driver);
- tty_unregister_driver(mxvar_sdriver);
- tty_driver_kref_put(mxvar_sdriver);
-}
-
-module_init(mxser_module_init);
-module_exit(mxser_module_exit);
diff --git a/drivers/tty/serial/8250/8250_mxupci.c b/drivers/tty/serial/8250/8250_mxupci.c
new file mode 100644
index 000000000000..fe899ff090c4
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_mxupci.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 8250_mxupci.c - Moxa UPCI multiport serial device driver
+ *
+ * Copyright (C) 2025 Moxa Inc. (support@moxa.com)
+ * Author: Crescent Hsieh <crescentcy.hsieh@moxa.com>
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/8250_pci.h>
+
+#include "8250.h"
+#include "8250_pcilib.h"
+
+#define PCI_DEVICE_ID_MOXA_RC7000 0x0001
+#define PCI_DEVICE_ID_MOXA_CP102 0x1020
+#define PCI_DEVICE_ID_MOXA_CP102UL 0x1021
+#define PCI_DEVICE_ID_MOXA_CP102U 0x1022
+#define PCI_DEVICE_ID_MOXA_CP102UF 0x1023
+#define PCI_DEVICE_ID_MOXA_C104 0x1040
+#define PCI_DEVICE_ID_MOXA_CP104U 0x1041
+#define PCI_DEVICE_ID_MOXA_CP104JU 0x1042
+#define PCI_DEVICE_ID_MOXA_CP104EL 0x1043
+#define PCI_DEVICE_ID_MOXA_POS104UL 0x1044
+#define PCI_DEVICE_ID_MOXA_CB108 0x1080
+#define PCI_DEVICE_ID_MOXA_CP112UL 0x1120
+#define PCI_DEVICE_ID_MOXA_CT114 0x1140
+#define PCI_DEVICE_ID_MOXA_CP114 0x1141
+#define PCI_DEVICE_ID_MOXA_CB114 0x1142
+#define PCI_DEVICE_ID_MOXA_CP114UL 0x1143
+#define PCI_DEVICE_ID_MOXA_CP118U 0x1180
+#define PCI_DEVICE_ID_MOXA_CP118EL 0x1181
+#define PCI_DEVICE_ID_MOXA_CP132 0x1320
+#define PCI_DEVICE_ID_MOXA_CP132U 0x1321
+#define PCI_DEVICE_ID_MOXA_CP134U 0x1340
+#define PCI_DEVICE_ID_MOXA_CB134I 0x1341
+#define PCI_DEVICE_ID_MOXA_CP138U 0x1380
+#define PCI_DEVICE_ID_MOXA_C168 0x1680
+#define PCI_DEVICE_ID_MOXA_CP168U 0x1681
+#define PCI_DEVICE_ID_MOXA_CP168EL 0x1682
+
+#define MOXA_UART_BASE_BAUD 921600
+#define MOXA_UART_OFFSET 8
+
+struct mxupci8250 {
+ struct pci_dev *pdev;
+ unsigned int num_ports;
+ int line[];
+};
+
+static unsigned short mxupci8250_get_nports(unsigned short device)
+{
+ switch (device) {
+ case PCI_DEVICE_ID_MOXA_RC7000:
+ return 8;
+ }
+
+ return FIELD_GET(0x00F0, device);
+}
+
+static int mxupci8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct uart_8250_port up;
+ struct mxupci8250 *priv;
+ unsigned int i, num_ports;
+ int ret;
+
+ ret = pcim_enable_device(pdev);
+ pci_save_state(pdev);
+
+ if (ret)
+ return ret;
+
+ num_ports = mxupci8250_get_nports(pdev->device);
+
+ priv = devm_kzalloc(&pdev->dev, struct_size(priv, line, num_ports), GFP_KERNEL);
+
+ if (!priv)
+ return -ENOMEM;
+
+ priv->num_ports = num_ports;
+ priv->pdev = pdev;
+
+ memset(&up, 0, sizeof(up));
+
+ up.port.dev = &pdev->dev;
+ up.port.irq = pdev->irq;
+ up.port.uartclk = MOXA_UART_BASE_BAUD * 16;
+ up.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+
+ for (i = 0; i < num_ports; i++) {
+ if (serial8250_pci_setup_port(pdev, &up, FL_GET_BASE(FL_BASE2), i * MOXA_UART_OFFSET, 0))
+ break;
+
+ dev_dbg(&pdev->dev, "Setup PCI port: port %lx, irq %d, type %d\n",
+ up.port.iobase, up.port.irq, up.port.iotype);
+
+ priv->line[i] = serial8250_register_8250_port(&up);
+
+ if (priv->line[i] < 0) {
+ dev_err(&pdev->dev,
+ "Couldn't register serial port %lx, irq %d, type %d, error %d\n",
+ up.port.iobase, up.port.irq,
+ up.port.iotype, priv->line[i]);
+ break;
+ }
+ }
+ pci_set_drvdata(pdev, priv);
+
+ return 0;
+}
+
+static void mxupci8250_remove(struct pci_dev *pdev)
+{
+ struct mxupci8250 *priv = pci_get_drvdata(pdev);
+ unsigned int i;
+
+ for (i = 0; i < priv->num_ports; i++)
+ serial8250_unregister_port(priv->line[i]);
+}
+
+static const struct pci_device_id mxupci8250_pci_ids[] = {
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UF), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_POS104UL), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CB108), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP112UL), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CB114), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114UL), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CB134I), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP138U), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL), },
+ { }
+};
+
+static struct pci_driver mxupci8250_pci_driver = {
+ .name = "8250_mxupci",
+ .id_table = mxupci8250_pci_ids,
+ .probe = mxupci8250_probe,
+ .remove = mxupci8250_remove,
+};
+
+module_pci_driver(mxupci8250_pci_driver);
+MODULE_AUTHOR("Moxa Inc.");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Moxa UPCI Multiport Serial Device Driver");
+MODULE_DEVICE_TABLE(pci, mxupci8250_pci_ids);
+MODULE_IMPORT_NS("SERIAL_8250_PCI");
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 55d26d16df9b..e8b2878f8ab0 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -157,6 +157,17 @@ config SERIAL_8250_EXAR
422x PCIe serial cards that are not covered by the more generic
SERIAL_8250_PCI option.
+config SERIAL_8250_MOXA_UPCI
+ tristate "8250/16550 Moxa UPCI device support"
+ depends on SERIAL_8250 && PCI
+ select SERIAL_8250_PCILIB
+ default SERIAL_8250
+ help
+ Say Y here if you have a Moxa UPCI serial card.
+
+ To compile this driver as a module, choose M here: the
+ module will be called 8250_mxupci.
+
config SERIAL_8250_HP300
tristate
depends on SERIAL_8250 && HP300
diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile
index 1516de629b61..da9d35911bd5 100644
--- a/drivers/tty/serial/8250/Makefile
+++ b/drivers/tty/serial/8250/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_SERIAL_8250_LPC18XX) += 8250_lpc18xx.o
obj-$(CONFIG_SERIAL_8250_LPSS) += 8250_lpss.o
obj-$(CONFIG_SERIAL_8250_MEN_MCB) += 8250_men_mcb.o
obj-$(CONFIG_SERIAL_8250_MID) += 8250_mid.o
+obj-$(CONFIG_SERIAL_8250_MOXA_UPCI) += 8250_mxupci.o
obj-$(CONFIG_SERIAL_8250_MT6577) += 8250_mtk.o
obj-$(CONFIG_SERIAL_OF_PLATFORM) += 8250_of.o
obj-$(CONFIG_SERIAL_8250_OMAP) += 8250_omap.o
--
2.45.2On Sun, Nov 30, 2025 at 12:43 PM Crescent Hsieh <crescentcy.hsieh@moxa.com> wrote: > > Remove the legacy mxser driver and replace it with 8250-based > implementation (8250_mxupci) for Moxa UPCI serial devices. > > This simplifies maintenance and improves integration with the existing > 8250 serial infrastructure. One obvious question (that I found no clear answer to in the commit message): Does it mean all functionality is kept the same? (I think I know the answer and this has to be summarised in the commit message.) And one potential issue with the change: Please, instead of removing the old option, use transition Kconfig to make sure users will get the driver compiled when moving from old kernel configurations to a new one. However, see above. it might be more tricky to achieve a smooth transition at the end. -- With Best Regards, Andy Shevchenko
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