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linux-nv-oot/drivers/tty/serial/wch_35x/wch_serial.c
Laxman Dewangan 43e89a0862 tty: Replace unsigned char to u8 for Linux 6.6 
Based on following change, replace the unsigned char to u8
for serial:wch_serial.
--
commit dcaafbe6ee3b39f2df11a1352f85172f8ade17a5
Author: Jiri Slaby (SUSE) <jirislaby@kernel.org>

    tty: propagate u8 data to tty_operations::put_char()
---

Bug 4346767

Change-Id: I2555383d59fe8c95a7a1b6220e3209138416c2eb
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3007447
Tested-by: Bitan Biswas <bbiswas@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
2023-11-01 20:21:06 -07:00

2996 lines
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/*
* Copyright (c) 2021-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*/
#include <nvidia/conftest.h>
#include <linux/version.h>
#include "wch_common.h"
#if defined(NV_DEFINE_SEMAPHORE_HAS_NUMBER_ARG)
static DEFINE_SEMAPHORE(ser_port_sem, 1);
#else
static DEFINE_SEMAPHORE(ser_port_sem);
#endif
#define WCH_HIGH_BITS_OFFSET ((sizeof(long) - sizeof(int)) * 8)
#define wch_ser_users(state) ((state)->count + ((state)->info ? (state)->info->blocked_open : 0))
struct serial_uart_config {
char *name;
int dfl_xmit_fifo_size;
int flags;
};
static const struct serial_uart_config wch_uart_config[PORT_SER_MAX_UART + 1] = {
{ "unknown", 1, 0},
{ "8250", 1, 0},
{ "16450", 1, 0},
{ "16550", 1, 0},
{ "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO},
{ "Cirrus", 1, 0},
{ "ST16650", 1, 0},
{"ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO},
{ "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO},
};
static _INLINE_ void ser_handle_cts_change(struct ser_port *, unsigned int);
static _INLINE_ void ser_update_mctrl(struct ser_port *, unsigned int, unsigned int);
static void ser_write_wakeup(struct ser_port *);
static void ser_stop(struct tty_struct *);
static void _ser_start(struct tty_struct *);
static void ser_start(struct tty_struct *);
static void ser_tasklet_action(unsigned long);
static int ser_startup(struct ser_state *, int);
static void ser_shutdown(struct ser_state *);
static _INLINE_ void _ser_put_char(struct ser_port *, struct circ_buf *, unsigned char);
#if defined(NV_TTY_SERIAL_TYPE_U8_CHANGE)
static int ser_put_char(struct tty_struct *, u8);
#else
static int ser_put_char(struct tty_struct *, unsigned char);
#endif
static void ser_flush_chars(struct tty_struct *);
static unsigned int ser_chars_in_buffer(struct tty_struct *tty);
static void ser_flush_buffer(struct tty_struct *);
static void ser_send_xchar(struct tty_struct *, char);
static void ser_throttle(struct tty_struct *);
static void ser_unthrottle(struct tty_struct *);
static int ser_get_info(struct ser_state *, struct serial_struct *);
static int ser_set_info(struct ser_state *, struct serial_struct *);
static unsigned int ser_write_room(struct tty_struct *tty);
#if defined(NV_TTY_SERIAL_TYPE_U8_CHANGE)
static ssize_t ser_write(struct tty_struct *, const u8 *, size_t);
#else
static int ser_write(struct tty_struct *, const unsigned char *, int);
#endif
// static int ser_get_lsr_info(struct ser_state *, unsigned int *);
static int ser_tiocmget(struct tty_struct *);
static int ser_tiocmset(struct tty_struct *, unsigned int, unsigned int);
static int ser_break_ctl(struct tty_struct *, int);
static int ser_wait_modem_status(struct ser_state *, unsigned long);
static int ser_get_count(struct ser_state *, struct serial_icounter_struct *);
static int ser_ioctl(struct tty_struct *, unsigned int, unsigned long);
static void ser_hangup(struct tty_struct *);
unsigned int ser_get_divisor(struct ser_port *, unsigned int, bool);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 1, 0)
unsigned int ser_get_baud_rate(struct ser_port *, struct WCHTERMIOS *, const struct WCHTERMIOS *, unsigned int, unsigned int);
static void ser_change_speed(struct ser_state *state, const struct WCHTERMIOS *old_termios);
#else
unsigned int ser_get_baud_rate(struct ser_port *, struct WCHTERMIOS *, struct WCHTERMIOS *, unsigned int, unsigned int);
static void ser_change_speed(struct ser_state *state, struct WCHTERMIOS *old_termios);
#endif
static void ser_update_termios(struct ser_state *);
static void ser_update_timeout(struct ser_port *, unsigned int, unsigned int);
static struct ser_state *ser_get(struct ser_driver *, int);
static int ser_block_til_ready(struct file *, struct ser_state *);
static void ser_wait_until_sent(struct tty_struct *, int);
static int ser_open(struct tty_struct *, struct file *);
static void ser_close(struct tty_struct *, struct file *);
static void wch_ser_set_mctrl(struct ser_port *, unsigned int);
static unsigned int wch_ser_tx_empty(struct ser_port *);
static unsigned int wch_ser_get_mctrl(struct ser_port *);
static void wch_ser_stop_tx(struct ser_port *, unsigned int);
static void wch_ser_start_tx(struct ser_port *, unsigned int);
static void wch_ser_stop_rx(struct ser_port *);
static void wch_ser_enable_ms(struct ser_port *);
static void wch_ser_break_ctl(struct ser_port *, int);
static int wch_ser_startup(struct ser_port *);
static void wch_ser_shutdown(struct ser_port *);
static unsigned int wch_ser_get_divisor(struct ser_port *, unsigned int, bool);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 1, 0)
static void wch_ser_set_termios(struct ser_port *port, struct WCHTERMIOS *termios, const struct WCHTERMIOS *old);
#else
static void wch_ser_set_termios(struct ser_port *port, struct WCHTERMIOS *termios, struct WCHTERMIOS *old);
#endif
static void wch_ser_timeout(struct timer_list *);
static _INLINE_ void ser_receive_chars(struct wch_ser_port *, unsigned char *, unsigned char);
static _INLINE_ void ser_transmit_chars(struct wch_ser_port *);
static _INLINE_ void ser_check_modem_status(struct wch_ser_port *, unsigned char);
static _INLINE_ void ser_handle_port(struct wch_ser_port *, unsigned char);
extern int wch_ser_interrupt(struct wch_board *, struct wch_ser_port *);
static void wch_ser_release_io(struct ser_port *);
static void wch_ser_request_io(struct ser_port *);
static void wch_ser_configure_port(struct ser_driver *, struct ser_state *, struct ser_port *);
static void wch_ser_unconfigure_port(struct ser_driver *, struct ser_state *);
static int wch_ser_add_one_port(struct ser_driver *, struct ser_port *);
static int wch_ser_remove_one_port(struct ser_driver *, struct ser_port *);
extern int wch_ser_register_ports(struct ser_driver *);
extern void wch_ser_unregister_ports(struct ser_driver *);
extern int wch_ser_register_driver(struct ser_driver *);
extern void wch_ser_unregister_driver(struct ser_driver *);
static unsigned char READ_INTERRUPT_VECTOR_BYTE(struct wch_ser_port *);
static unsigned int READ_INTERRUPT_VECTOR_WORD(struct wch_ser_port *sp);
static unsigned char READ_UART_RX(struct wch_ser_port *);
static unsigned char READ_UART_IER(struct wch_ser_port *);
static unsigned char READ_UART_IIR(struct wch_ser_port *);
static unsigned char READ_UART_LCR(struct wch_ser_port *);
static unsigned char READ_UART_MCR(struct wch_ser_port *);
static unsigned char READ_UART_LSR(struct wch_ser_port *);
static unsigned char READ_UART_MSR(struct wch_ser_port *);
static void WRITE_UART_TX(struct wch_ser_port *, unsigned char);
static void WRITE_UART_IER(struct wch_ser_port *, unsigned char);
static void WRITE_UART_FCR(struct wch_ser_port *, unsigned char);
static void WRITE_UART_LCR(struct wch_ser_port *, unsigned char);
static void WRITE_UART_MCR(struct wch_ser_port *, unsigned char);
static void WRITE_UART_DLL(struct wch_ser_port *, int);
static void WRITE_UART_DLM(struct wch_ser_port *, int);
static unsigned char READ_INTERRUPT_VECTOR_BYTE(struct wch_ser_port *sp)
{
unsigned char data = 0;
if (sp->port.vector) {
data = inb(sp->port.vector);
return data;
}
return 0;
}
static unsigned int READ_INTERRUPT_VECTOR_WORD(struct wch_ser_port *sp)
{
unsigned int data = 0;
unsigned int vet1 = 0;
unsigned int vet2 = 0;
if (sp->port.vector) {
vet1 = inb(sp->port.vector);
vet2 = inb(sp->port.vector - 0x10);
vet2 <<= 8;
data = (vet1 | vet2);
return data;
}
return 0;
}
static unsigned long READ_INTERRUPT_VECTOR_DWORD(struct wch_ser_port *sp)
{
unsigned long data = 0;
if (sp->port.iobase) {
data = inl(sp->port.chip_iobase + 0xE8);
}
return data;
}
static unsigned char READ_UART_RX(struct wch_ser_port *sp)
{
unsigned char data = 0;
if (sp->port.iobase) {
if (ch365_32s) {
data = readb(sp->port.port_membase + UART_RX);
} else {
data = inb(sp->port.iobase + UART_RX);
}
return data;
}
return 0;
}
static unsigned char READ_UART_RX_BUFFER(struct wch_ser_port *sp, unsigned char *buf, int count)
{
if (sp->port.iobase) {
{
insb(sp->port.iobase + UART_RX, buf, count);
}
}
return 0;
}
static void WRITE_UART_TX(struct wch_ser_port *sp, unsigned char data)
{
if (sp->port.iobase) {
if (ch365_32s) {
writeb(data, sp->port.port_membase + UART_TX);
} else {
outb(data, sp->port.iobase + UART_TX);
}
}
}
static void WRITE_UART_IER(struct wch_ser_port *sp, unsigned char data)
{
if (sp->port.iobase) {
if (ch365_32s) {
writeb(data, sp->port.port_membase + UART_IER);
} else {
outb(data, sp->port.iobase + UART_IER);
}
}
}
static unsigned char READ_UART_IER(struct wch_ser_port *sp)
{
unsigned char data = 0;
if (sp->port.iobase) {
if (ch365_32s) {
data = readb(sp->port.port_membase + UART_IER);
} else {
data = inb(sp->port.iobase + UART_IER);
}
return data;
}
return 0;
}
static unsigned char READ_UART_IIR(struct wch_ser_port *sp)
{
unsigned char data = 0;
if (sp->port.iobase) {
if (ch365_32s) {
data = readb(sp->port.port_membase + UART_IIR);
} else {
data = inb(sp->port.iobase + UART_IIR);
}
return data;
}
return 0;
}
static void WRITE_UART_FCR(struct wch_ser_port *sp, unsigned char data)
{
if (sp->port.iobase) {
if (ch365_32s) {
writeb(data, sp->port.port_membase + UART_FCR);
} else {
outb(data, sp->port.iobase + UART_FCR);
}
}
}
static unsigned char READ_UART_LCR(struct wch_ser_port *sp)
{
unsigned char data = 0;
if (sp->port.iobase) {
if (ch365_32s) {
data = readb(sp->port.port_membase + UART_LCR);
} else {
data = inb(sp->port.iobase + UART_LCR);
}
return data;
}
return 0;
}
static unsigned char READ_UART_MCR(struct wch_ser_port *sp)
{
unsigned char data = 0;
if (sp->port.iobase) {
if (ch365_32s) {
data = readb(sp->port.port_membase + UART_MCR);
} else {
data = inb(sp->port.iobase + UART_MCR);
}
return data;
}
return 0;
}
static void WRITE_UART_LCR(struct wch_ser_port *sp, unsigned char data)
{
if (sp->port.iobase) {
if (ch365_32s) {
writeb(data, sp->port.port_membase + UART_LCR);
} else {
outb(data, sp->port.iobase + UART_LCR);
}
}
}
static void WRITE_UART_MCR(struct wch_ser_port *sp, unsigned char data)
{
if (sp->port.iobase) {
if (ch365_32s) {
writeb(data, sp->port.port_membase + UART_MCR);
} else {
outb(data, sp->port.iobase + UART_MCR);
}
}
}
static unsigned char READ_UART_LSR(struct wch_ser_port *sp)
{
unsigned char data = 0;
if (sp->port.iobase) {
if (ch365_32s) {
data = readb(sp->port.port_membase + UART_LSR);
} else {
data = inb(sp->port.iobase + UART_LSR);
}
return data;
}
return 0;
}
static unsigned char READ_UART_MSR(struct wch_ser_port *sp)
{
unsigned char data = 0;
if (sp->port.iobase) {
if (ch365_32s) {
data = readb(sp->port.port_membase + UART_MSR);
} else {
data = inb(sp->port.iobase + UART_MSR);
}
return data;
}
return 0;
}
static void WRITE_UART_DLL(struct wch_ser_port *sp, int data)
{
if (sp->port.iobase) {
if (ch365_32s) {
writeb(data, sp->port.port_membase + UART_DLL);
} else {
outb(data, sp->port.iobase + UART_DLL);
}
}
}
static void WRITE_UART_DLM(struct wch_ser_port *sp, int data)
{
if (sp->port.iobase) {
if (ch365_32s) {
writeb(data, sp->port.port_membase + UART_DLM);
} else {
outb(data, sp->port.iobase + UART_DLM);
}
}
}
static _INLINE_ void ser_handle_cts_change(struct ser_port *port, unsigned int status)
{
struct ser_info *info = port->info;
struct tty_struct *tty = info->tty;
port->icount.cts++;
if (info->flags & WCH_UIF_CTS_FLOW) {
if (tty->hw_stopped) {
if (status) {
tty->hw_stopped = 0;
wch_ser_start_tx(port, 0);
ser_write_wakeup(port);
}
} else {
if (!status) {
tty->hw_stopped = 1;
wch_ser_stop_tx(port, 0);
}
}
}
}
static _INLINE_ void ser_update_mctrl(struct ser_port *port, unsigned int set, unsigned int clear)
{
unsigned long flags;
unsigned int old;
spin_lock_irqsave(&port->lock, flags);
old = port->mctrl;
port->mctrl = (old & ~clear) | set;
if (port->hardflow)
port->mctrl |= UART_MCR_RTS;
if (old != port->mctrl) {
wch_ser_set_mctrl(port, port->mctrl);
}
spin_unlock_irqrestore(&port->lock, flags);
}
#define set_mctrl(port, set) ser_update_mctrl(port, set, 0)
#define clear_mctrl(port, clear) ser_update_mctrl(port, 0, clear)
static void ser_write_wakeup(struct ser_port *port)
{
struct ser_info *info = port->info;
tasklet_schedule(&info->tlet);
}
static void ser_stop(struct tty_struct *tty)
{
struct ser_state *state = NULL;
struct ser_port *port = NULL;
unsigned long flags;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return;
}
state = tty->driver_data;
port = state->port;
spin_lock_irqsave(&port->lock, flags);
wch_ser_stop_tx(port, 1);
spin_unlock_irqrestore(&port->lock, flags);
}
static void _ser_start(struct tty_struct *tty)
{
struct ser_state *state = tty->driver_data;
struct ser_port *port = state->port;
if (!ser_circ_empty(&state->info->xmit) && state->info->xmit.buf && !tty->flow.stopped && !tty->hw_stopped)
wch_ser_start_tx(port, 1);
}
static void ser_start(struct tty_struct *tty)
{
struct ser_state *state = NULL;
struct ser_port *port = NULL;
unsigned long flags;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt)
return;
state = tty->driver_data;
port = state->port;
spin_lock_irqsave(&port->lock, flags);
_ser_start(tty);
spin_unlock_irqrestore(&port->lock, flags);
}
static void ser_tasklet_action(unsigned long data)
{
struct ser_state *state = (struct ser_state *)data;
struct tty_struct *tty = NULL;
tty = state->info->tty;
if (tty) {
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc->ops->write_wakeup) {
tty->ldisc->ops->write_wakeup(tty);
}
wake_up_interruptible(&tty->write_wait);
}
}
static int ser_startup(struct ser_state *state, int init_hw)
{
struct ser_info *info = state->info;
struct ser_port *port = state->port;
unsigned long page;
int retval = 0;
if (info->flags & WCH_UIF_INITIALIZED) {
return 0;
}
if (info->tty) {
set_bit(TTY_IO_ERROR, &info->tty->flags);
}
if (port->type == PORT_UNKNOWN) {
return 0;
}
if (!info->xmit.buf) {
page = get_zeroed_page(GFP_KERNEL);
if (!page) {
return -ENOMEM;
}
info->xmit.buf = (unsigned char *)page;
info->tmpbuf = info->xmit.buf + WCH_UART_XMIT_SIZE;
sema_init(&info->tmpbuf_sem, 1);
ser_circ_clear(&info->xmit);
}
retval = wch_ser_startup(port);
if (retval == 0) {
if (init_hw) {
ser_change_speed(state, NULL);
if (info->tty->termios.c_cflag & CBAUD)
{
set_mctrl(port, TIOCM_RTS | TIOCM_DTR);
}
}
info->flags |= WCH_UIF_INITIALIZED;
clear_bit(TTY_IO_ERROR, &info->tty->flags);
}
if (retval && capable(CAP_SYS_ADMIN)) {
retval = 0;
}
set_mctrl(port, TIOCM_OUT2);
return retval;
}
static void ser_shutdown(struct ser_state *state)
{
struct ser_info *info = state->info;
struct ser_port *port = state->port;
struct wch_ser_port *sp = (struct wch_ser_port *)port;
if (!(info->flags & WCH_UIF_INITIALIZED)) {
return;
}
if (!info->tty || (info->tty->termios.c_cflag & HUPCL))
{
clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
}
wake_up_interruptible(&info->delta_msr_wait);
wch_ser_shutdown(port);
synchronize_irq(port->irq);
if (info->xmit.buf) {
free_page((unsigned long)info->xmit.buf);
info->xmit.buf = NULL;
if (info->tmpbuf)
info->tmpbuf = NULL;
}
tasklet_kill(&info->tlet);
if (info->tty) {
set_bit(TTY_IO_ERROR, &info->tty->flags);
}
// modified on 20200929
sp->mcr = 0;
clear_mctrl(port, TIOCM_OUT2 | TIOCM_DTR | TIOCM_RTS);
info->flags &= ~WCH_UIF_INITIALIZED;
}
static _INLINE_ void _ser_put_char(struct ser_port *port, struct circ_buf *circ, unsigned char c)
{
unsigned long flags;
if (!circ->buf) {
return;
}
spin_lock_irqsave(&port->lock, flags);
if (ser_circ_chars_free(circ) != 0) {
circ->buf[circ->head] = c;
circ->head = (circ->head + 1) & (WCH_UART_XMIT_SIZE - 1);
}
spin_unlock_irqrestore(&port->lock, flags);
}
#if defined(NV_TTY_SERIAL_TYPE_U8_CHANGE)
static int ser_put_char(struct tty_struct *tty, u8 ch)
#else
static int ser_put_char(struct tty_struct *tty, unsigned char ch)
#endif
{
struct ser_state *state = NULL;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return 0;
}
state = tty->driver_data;
_ser_put_char(state->port, &state->info->xmit, ch);
return 0;
}
static void ser_flush_chars(struct tty_struct *tty)
{
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return;
}
ser_start(tty);
}
static unsigned int ser_chars_in_buffer(struct tty_struct *tty)
{
struct ser_state *state = NULL;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return 0;
}
state = tty->driver_data;
return ser_circ_chars_pending(&state->info->xmit);
}
static void ser_flush_buffer(struct tty_struct *tty)
{
struct ser_state *state = NULL;
struct ser_port *port = NULL;
unsigned long flags;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return;
}
state = tty->driver_data;
port = state->port;
if (!state || !state->info) {
return;
}
spin_lock_irqsave(&port->lock, flags);
ser_circ_clear(&state->info->xmit);
spin_unlock_irqrestore(&port->lock, flags);
wake_up_interruptible(&tty->write_wait);
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc->ops->write_wakeup) {
(tty->ldisc->ops->write_wakeup)(tty);
}
}
static void ser_send_xchar(struct tty_struct *tty, char ch)
{
struct ser_state *state = NULL;
struct ser_port *port = NULL;
unsigned long flags;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return;
}
state = tty->driver_data;
port = state->port;
port->x_char = ch;
if (ch) {
spin_lock_irqsave(&port->lock, flags);
wch_ser_start_tx(port, 0);
spin_unlock_irqrestore(&port->lock, flags);
}
}
static void ser_throttle(struct tty_struct *tty)
{
struct ser_state *state = NULL;
struct ser_port *port = NULL;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return;
}
state = tty->driver_data;
port = state->port;
port->ldisc_stop_rx = 1;
if (I_IXOFF(tty)) {
ser_send_xchar(tty, STOP_CHAR(tty));
}
if (tty->termios.c_cflag & CRTSCTS)
{
clear_mctrl(state->port, TIOCM_RTS);
}
}
static void ser_unthrottle(struct tty_struct *tty)
{
struct ser_state *state = NULL;
struct ser_port *port = NULL;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return;
}
state = tty->driver_data;
port = state->port;
port->ldisc_stop_rx = 0;
if (I_IXOFF(tty)) {
if (port->x_char) {
port->x_char = 0;
} else {
ser_send_xchar(tty, START_CHAR(tty));
}
}
if (tty->termios.c_cflag & CRTSCTS)
{
set_mctrl(port, TIOCM_RTS);
}
}
static int ser_get_info(struct ser_state *state, struct serial_struct *retinfo)
{
struct ser_port *port = state->port;
struct serial_struct tmp;
memset(&tmp, 0, sizeof(tmp));
tmp.type = port->type;
tmp.line = port->line;
tmp.port = port->iobase;
if (WCH_HIGH_BITS_OFFSET) {
tmp.port_high = (long)port->iobase >> WCH_HIGH_BITS_OFFSET;
}
tmp.irq = port->irq;
tmp.flags = port->flags;
tmp.xmit_fifo_size = port->fifosize;
tmp.baud_base = port->uartclk / 16;
tmp.close_delay = state->close_delay;
tmp.closing_wait = state->closing_wait;
tmp.custom_divisor = port->custom_divisor;
tmp.io_type = port->iotype;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) {
return -EFAULT;
}
return 0;
}
static int ser_set_info(struct ser_state *state, struct serial_struct *newinfo)
{
struct serial_struct new_serial;
struct ser_port *port = state->port;
unsigned long new_port;
unsigned int change_irq;
unsigned int change_port;
unsigned int old_custom_divisor;
unsigned int closing_wait;
unsigned int close_delay;
unsigned int old_flags;
unsigned int new_flags;
int retval = 0;
if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) {
return -EFAULT;
}
new_port = new_serial.port;
if (WCH_HIGH_BITS_OFFSET) {
new_port += (unsigned long)new_serial.port_high << WCH_HIGH_BITS_OFFSET;
}
new_serial.irq = irq_canonicalize(new_serial.irq);
close_delay = new_serial.close_delay;
closing_wait =
new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? WCH_USF_CLOSING_WAIT_NONE : new_serial.closing_wait;
down(&state->sem);
change_irq = new_serial.irq != port->irq;
change_port = new_port != port->iobase || new_serial.io_type != port->iotype || new_serial.type != port->type;
old_flags = port->flags;
new_flags = new_serial.flags;
old_custom_divisor = port->custom_divisor;
if (!capable(CAP_SYS_ADMIN)) {
retval = -EPERM;
if (change_irq || change_port || (new_serial.baud_base != port->uartclk / 16) ||
(close_delay != state->close_delay) || (closing_wait != state->closing_wait) ||
(new_serial.xmit_fifo_size != port->fifosize) || (((new_flags ^ old_flags) & ~WCH_UPF_USR_MASK) != 0)) {
goto exit;
}
port->flags = ((port->flags & ~WCH_UPF_USR_MASK) | (new_flags & WCH_UPF_USR_MASK));
port->custom_divisor = new_serial.custom_divisor;
goto check_and_exit;
}
if (change_port || change_irq) {
retval = -EBUSY;
if (wch_ser_users(state) > 1) {
goto exit;
}
ser_shutdown(state);
}
if (change_port) {
unsigned long old_iobase;
unsigned int old_type;
unsigned int old_iotype;
old_iobase = port->iobase;
old_type = port->type;
old_iotype = port->iotype;
if (old_type != PORT_UNKNOWN) {
wch_ser_release_io(port);
}
port->iobase = new_port;
port->type = new_serial.type;
port->iotype = new_serial.io_type;
retval = 0;
}
port->irq = new_serial.irq;
port->uartclk = new_serial.baud_base * 16;
port->flags = ((port->flags & ~WCH_UPF_CHANGE_MASK) | (new_flags & WCH_UPF_CHANGE_MASK));
port->custom_divisor = new_serial.custom_divisor;
state->close_delay = close_delay;
state->closing_wait = closing_wait;
port->fifosize = new_serial.xmit_fifo_size;
check_and_exit:
retval = 0;
if (port->type == PORT_UNKNOWN) {
goto exit;
}
if (state->info->flags & WCH_UIF_INITIALIZED) {
if (((old_flags ^ port->flags) & WCH_UPF_SPD_MASK) || old_custom_divisor != port->custom_divisor) {
if (port->flags & WCH_UPF_SPD_MASK) {
printk("WCH Info : %s sets custom speed on ttyWCH%d. This is deprecated.\n", current->comm, port->line);
}
ser_change_speed(state, NULL);
}
} else {
retval = ser_startup(state, 1);
}
exit:
up(&state->sem);
return retval;
}
static unsigned int ser_write_room(struct tty_struct *tty)
{
struct ser_state *state = NULL;
int line = WCH_SER_DEVNUM(tty);
int status = 0;
if (line >= wch_ser_port_total_cnt) {
return 0;
}
state = tty->driver_data;
status = ser_circ_chars_free(&state->info->xmit);
return status;
}
#if defined(NV_TTY_SERIAL_TYPE_U8_CHANGE)
static ssize_t ser_write(struct tty_struct *tty, const u8 *buf, size_t count)
#else
static int ser_write(struct tty_struct *tty, const unsigned char *buf, int count)
#endif
{
struct ser_state *state = tty->driver_data;
struct ser_port *port = NULL;
struct circ_buf *circ = NULL;
unsigned long flags;
int c;
int ret = 0;
if (!state || !state->info) {
return -EL3HLT;
}
port = state->port;
circ = &state->info->xmit;
if (!circ->buf) {
return 0;
}
spin_lock_irqsave(&port->lock, flags);
while (1) {
c = CIRC_SPACE_TO_END(circ->head, circ->tail, WCH_UART_XMIT_SIZE);
if (count < c) {
c = count;
}
if (c <= 0) {
break;
}
memcpy(circ->buf + circ->head, buf, c);
circ->head = (circ->head + c) & (WCH_UART_XMIT_SIZE - 1);
buf += c;
count -= c;
ret += c;
}
_ser_start(tty);
spin_unlock_irqrestore(&port->lock, flags);
return ret;
}
/*
static int
ser_get_lsr_info(
struct ser_state *state,
unsigned int *value
)
{
struct ser_port *port = state->port;
unsigned int result = 0;
result = wch_ser_tx_empty(port);
if ((port->x_char) ||
((ser_circ_chars_pending(&state->info->xmit) > 0) &&
!state->info->tty->flow.stopped && !state->info->tty->hw_stopped))
result &= ~TIOCSER_TEMT;
return put_user(result, value);
}
*/
static int ser_tiocmget(struct tty_struct *tty)
{
struct ser_state *state;
struct ser_port *port;
int result = -EIO;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return 0;
}
state = tty->driver_data;
port = state->port;
down(&state->sem);
if (!(tty->flags & (1 << TTY_IO_ERROR))) {
result = port->mctrl;
result |= wch_ser_get_mctrl(port);
}
up(&state->sem);
return result;
}
static int ser_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear)
{
struct ser_state *state;
struct ser_port *port;
int ret = -EIO;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return 0;
}
state = tty->driver_data;
port = state->port;
down(&state->sem);
if (!(tty->flags & (1 << TTY_IO_ERROR))) {
ser_update_mctrl(port, set, clear);
ret = 0;
}
up(&state->sem);
return ret;
}
static int ser_break_ctl(struct tty_struct *tty, int break_state)
{
struct ser_state *state = NULL;
struct ser_port *port = NULL;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return 0;
}
state = tty->driver_data;
port = state->port;
down(&state->sem);
if (port->type != PORT_UNKNOWN) {
wch_ser_break_ctl(port, break_state);
}
up(&state->sem);
return 0;
}
static int ser_wait_modem_status(struct ser_state *state, unsigned long arg)
{
struct ser_port *port = state->port;
DECLARE_WAITQUEUE(wait, current);
struct ser_icount cprev;
struct ser_icount cnow;
int ret = 0;
spin_lock_irq(&port->lock);
memcpy(&cprev, &port->icount, sizeof(struct ser_icount));
wch_ser_enable_ms(port);
spin_unlock_irq(&port->lock);
add_wait_queue(&state->info->delta_msr_wait, &wait);
for (;;) {
spin_lock_irq(&port->lock);
memcpy(&cnow, &port->icount, sizeof(struct ser_icount));
spin_unlock_irq(&port->lock);
set_current_state(TASK_INTERRUPTIBLE);
if (((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))) {
ret = 0;
break;
}
schedule();
if (signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
cprev = cnow;
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&state->info->delta_msr_wait, &wait);
return ret;
}
static int ser_get_count(struct ser_state *state, struct serial_icounter_struct *icnt)
{
struct serial_icounter_struct icount;
struct ser_icount cnow;
struct ser_port *port = state->port;
spin_lock_irq(&port->lock);
memcpy(&cnow, &port->icount, sizeof(struct ser_icount));
spin_unlock_irq(&port->lock);
icount.cts = cnow.cts;
icount.dsr = cnow.dsr;
icount.rng = cnow.rng;
icount.dcd = cnow.dcd;
icount.rx = cnow.rx;
icount.tx = cnow.tx;
icount.frame = cnow.frame;
icount.overrun = cnow.overrun;
icount.parity = cnow.parity;
icount.brk = cnow.brk;
icount.buf_overrun = cnow.buf_overrun;
return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
}
static void ser_config_rs485(struct ser_state *state, struct serial_rs485 *rs485)
{
struct ser_port *port = state->port;
struct wch_ser_port *sp = (struct wch_ser_port *)port;
struct serial_rs485 rs485val = *rs485;
unsigned char cval, mval;
cval = READ_UART_LCR(sp);
mval = READ_UART_MCR(sp);
WRITE_UART_LCR(sp, cval | UART_LCR_DLAB);
if (rs485val.flags & SER_RS485_ENABLED) {
WRITE_UART_MCR(sp, mval | BIT(7));
} else {
WRITE_UART_MCR(sp, mval & ~BIT(7));
}
WRITE_UART_LCR(sp, cval);
}
static int ser_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
{
struct ser_state *state = NULL;
int ret = -ENOIOCTLCMD;
int line = WCH_SER_DEVNUM(tty);
struct serial_rs485 rs485;
if (line < wch_ser_port_total_cnt) {
state = tty->driver_data;
}
switch (cmd) {
case TIOCGSERIAL: {
if (line < wch_ser_port_total_cnt) {
ret = ser_get_info(state, (struct serial_struct *)arg);
}
break;
}
case TIOCSSERIAL: {
if (line < wch_ser_port_total_cnt) {
state->port->setserial_flag = WCH_SER_BAUD_SETSERIAL;
ret = ser_set_info(state, (struct serial_struct *)arg);
}
break;
}
case TCGETS: {
struct ktermios kterm;
mutex_lock(&tty->throttle_mutex);
kterm = tty->termios;
mutex_unlock(&tty->throttle_mutex);
if (copy_to_user((struct termios __user *)arg, &kterm, sizeof(struct termios)))
ret = -EFAULT;
else
ret = 0;
break;
}
case TCSETS: {
if (line < wch_ser_port_total_cnt) {
state->port->flags &= ~(WCH_UPF_SPD_HI | WCH_UPF_SPD_VHI | WCH_UPF_SPD_SHI | WCH_UPF_SPD_WARP);
state->port->setserial_flag = WCH_SER_BAUD_NOTSETSER;
ser_update_termios(state);
}
break;
}
case TIOCSRS485: {
if (copy_from_user(&rs485, (void __user *)arg, sizeof(rs485)))
return -EFAULT;
ser_config_rs485(state, &rs485);
break;
}
case TIOCSERGWILD:
case TIOCSERSWILD: {
if (line < wch_ser_port_total_cnt) {
ret = 0;
}
break;
}
case TIOCMIWAIT:
if (line < wch_ser_port_total_cnt) {
ret = ser_wait_modem_status(state, arg);
}
break;
case TIOCGICOUNT:
if (line < wch_ser_port_total_cnt) {
ret = ser_get_count(state, (struct serial_icounter_struct *)arg);
}
break;
}
if (ret != -ENOIOCTLCMD) {
goto out;
}
if (tty->flags & (1 << TTY_IO_ERROR)) {
ret = -EIO;
goto out;
}
out:
return ret;
}
static void ser_hangup(struct tty_struct *tty)
{
struct ser_state *state = NULL;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return;
}
state = tty->driver_data;
down(&state->sem);
if (state->info && state->info->flags & WCH_UIF_NORMAL_ACTIVE) {
ser_flush_buffer(tty);
ser_shutdown(state);
state->count = 0;
state->info->flags &= ~WCH_UIF_NORMAL_ACTIVE;
state->info->tty = NULL;
wake_up_interruptible(&state->info->open_wait);
wake_up_interruptible(&state->info->delta_msr_wait);
}
up(&state->sem);
}
unsigned int ser_get_divisor(struct ser_port *port, unsigned int baud, bool btwicefreq)
{
unsigned int quot;
if (baud == 38400 && (port->flags & WCH_UPF_SPD_MASK) == WCH_UPF_SPD_CUST) {
quot = port->custom_divisor;
} else {
if (btwicefreq) {
if (10 * port->uartclk / 16 / baud % 10 >= 5)
quot = port->uartclk / 16 / baud + 1;
else
quot = port->uartclk / 16 / baud;
} else {
if (10 * port->uartclk / 24 / 16 / baud % 10 >= 5)
quot = port->uartclk / 24 / 16 / baud + 1;
else
quot = port->uartclk / 24 / 16 / baud;
}
}
return quot;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 1, 0)
unsigned int ser_get_baud_rate(struct ser_port *port, struct WCHTERMIOS *termios,
const struct WCHTERMIOS *old, unsigned int min, unsigned int max)
#else
unsigned int ser_get_baud_rate(struct ser_port *port, struct WCHTERMIOS *termios, struct WCHTERMIOS *old,
unsigned int min, unsigned int max)
#endif
{
unsigned int try;
unsigned int baud;
unsigned int altbaud = 38400;
int hung_up = 0;
unsigned int flags = port->flags & WCH_UPF_SPD_MASK;
if (port->flags & WCH_UPF_SPD_MASK) {
altbaud = 38400;
if (flags == WCH_UPF_SPD_HI) {
altbaud = 57600;
}
if (flags == WCH_UPF_SPD_VHI) {
altbaud = 115200;
}
if (flags == WCH_UPF_SPD_SHI) {
altbaud = 230400;
}
if (flags == WCH_UPF_SPD_WARP) {
altbaud = 460800;
}
}
for (try = 0; try < 2; try++) {
baud = tty_termios_baud_rate(termios);
if (try == 0 && baud == 38400)
baud = altbaud;
if (baud == 0) {
hung_up = 1;
baud = 9600;
}
if (baud >= min && baud <= max) {
return baud;
}
termios->c_cflag &= ~CBAUD;
if (old) {
baud = tty_termios_baud_rate(old);
if (!hung_up)
tty_termios_encode_baud_rate(termios, baud, baud);
old = NULL;
continue;
}
/*
* As a last resort, if the range cannot be met then clip to
* the nearest chip supported rate.
*/
if (!hung_up) {
if (baud <= min)
tty_termios_encode_baud_rate(termios, min + 1, min + 1);
else
tty_termios_encode_baud_rate(termios, max - 1, max - 1);
}
}
return 0;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 1, 0)
static void ser_change_speed(struct ser_state *state, const struct WCHTERMIOS *old_termios)
#else
static void ser_change_speed(struct ser_state *state, struct WCHTERMIOS *old_termios)
#endif
{
struct tty_struct *tty = state->info->tty;
struct ser_port *port = state->port;
struct WCHTERMIOS termios;
if (!tty || port->type == PORT_UNKNOWN) {
return;
}
termios = tty->termios;
if (termios.c_cflag & CRTSCTS) {
state->info->flags |= WCH_UIF_CTS_FLOW;
} else {
state->info->flags &= ~WCH_UIF_CTS_FLOW;
}
if (termios.c_cflag & CLOCAL) {
state->info->flags &= ~WCH_UIF_CHECK_CD;
} else {
state->info->flags |= WCH_UIF_CHECK_CD;
}
wch_ser_set_termios(port, &termios, old_termios);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 1, 0)
static void ser_set_termios(struct tty_struct *tty, const struct WCHTERMIOS *old_termios)
#else
static void ser_set_termios(struct tty_struct *tty, struct WCHTERMIOS *old_termios)
#endif
{
struct ser_state *state;
unsigned long flags;
unsigned int cflag = tty->termios.c_cflag;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return;
}
state = tty->driver_data;
#define RELEVANT_IFLAG(iflag) ((iflag) & (IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK))
if ((cflag ^ old_termios->c_cflag) == 0 && RELEVANT_IFLAG(tty->termios.c_iflag ^ old_termios->c_iflag) == 0)
{
return;
}
ser_change_speed(state, old_termios);
/* Drop RTS and DTR */
if ((cflag & CBAUD) == B0) {
clear_mctrl(state->port, TIOCM_RTS | TIOCM_DTR);
} else {
/* Ensure RTS and DTR are raised when baudrate changed from 0 */
if (old_termios && ((old_termios->c_cflag & CBAUD) == B0)) {
unsigned int mask = TIOCM_DTR;
if (!(cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags)) {
mask |= TIOCM_RTS;
}
set_mctrl(state->port, mask);
}
}
if ((old_termios->c_cflag & CRTSCTS) && !(cflag & CRTSCTS)) {
spin_lock_irqsave(&state->port->lock, flags);
tty->hw_stopped = 0;
_ser_start(tty);
spin_unlock_irqrestore(&state->port->lock, flags);
}
}
static void ser_update_termios(struct ser_state *state)
{
struct tty_struct *tty = state->info->tty;
struct ser_port *port = state->port;
if (!(tty->flags & (1 << TTY_IO_ERROR))) {
ser_change_speed(state, NULL);
if (tty->termios.c_cflag & CBAUD)
{
set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
}
}
}
static void ser_update_timeout(struct ser_port *port, unsigned int cflag, unsigned int baud)
{
unsigned int bits;
switch (cflag & CSIZE) {
case CS5:
bits = 7;
break;
case CS6:
bits = 8;
break;
case CS7:
bits = 9;
break;
default:
bits = 10;
break;
}
if (cflag & CSTOPB) {
bits++;
}
if (cflag & PARENB) {
bits++;
}
bits = bits * port->fifosize;
port->timeout = (HZ * bits) / baud + HZ / 50;
}
static struct ser_state *ser_get(struct ser_driver *drv, int line)
{
struct ser_state *state = NULL;
down(&ser_port_sem);
state = drv->state + line;
if (down_interruptible(&state->sem)) {
state = ERR_PTR(-ERESTARTSYS);
goto out;
}
state->count++;
if (!state->port) {
state->count--;
up(&state->sem);
state = ERR_PTR(-ENXIO);
goto out;
}
if (!state->port->iobase) {
state->count--;
up(&state->sem);
state = ERR_PTR(-ENXIO);
goto out;
}
if (!state->info) {
state->info = kmalloc(sizeof(struct ser_info), GFP_KERNEL);
if (state->info) {
memset(state->info, 0, sizeof(struct ser_info));
init_waitqueue_head(&state->info->open_wait);
init_waitqueue_head(&state->info->delta_msr_wait);
state->port->info = state->info;
tasklet_init(&state->info->tlet, ser_tasklet_action, (unsigned long)state);
} else {
state->count--;
up(&state->sem);
state = ERR_PTR(-ENOMEM);
}
}
out:
up(&ser_port_sem);
return state;
}
static int ser_block_til_ready(struct file *filp, struct ser_state *state)
{
DECLARE_WAITQUEUE(wait, current);
struct ser_info *info = state->info;
struct ser_port *port = state->port;
info->blocked_open++;
state->count--;
add_wait_queue(&info->open_wait, &wait);
while (1) {
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) || info->tty == NULL) {
break;
}
if (!(info->flags & WCH_UIF_INITIALIZED)) {
break;
}
if ((filp->f_flags & O_NONBLOCK) || (info->tty->termios.c_cflag & CLOCAL) ||
(info->tty->flags & (1 << TTY_IO_ERROR)))
{
break;
}
if (info->tty->termios.c_cflag & CBAUD)
{
set_mctrl(port, TIOCM_DTR);
}
if (wch_ser_get_mctrl(port) & TIOCM_CAR) {
break;
}
up(&state->sem);
schedule();
down(&state->sem);
if (signal_pending(current)) {
break;
}
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&info->open_wait, &wait);
state->count++;
info->blocked_open--;
if (signal_pending(current)) {
return -ERESTARTSYS;
}
if (!info->tty || tty_hung_up_p(filp)) {
return -EAGAIN;
}
return 0;
}
static void ser_wait_until_sent(struct tty_struct *tty, int timeout)
{
struct ser_state *state = NULL;
struct ser_port *port = NULL;
unsigned long char_time;
unsigned long expire;
int line = WCH_SER_DEVNUM(tty);
if (line >= wch_ser_port_total_cnt) {
return;
}
state = tty->driver_data;
port = state->port;
if (port->type == PORT_UNKNOWN || port->fifosize == 0) {
return;
}
char_time = (port->timeout - HZ / 50) / port->fifosize;
char_time = char_time / 5;
if (char_time == 0) {
char_time = 1;
}
if (timeout && timeout < char_time) {
char_time = timeout;
}
if (timeout == 0 || timeout > 2 * port->timeout) {
timeout = 2 * port->timeout;
}
expire = jiffies + timeout;
while (!wch_ser_tx_empty(port)) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(char_time);
if (signal_pending(current)) {
break;
}
if (time_after(jiffies, expire)) {
break;
}
}
set_current_state(TASK_RUNNING);
}
static int ser_open(struct tty_struct *tty, struct file *filp)
{
struct ser_driver *drv = (struct ser_driver *)tty->driver->driver_state;
struct ser_state *state;
int retval = 0;
int line = WCH_SER_DEVNUM(tty);
if (line < wch_ser_port_total_cnt) {
retval = -ENODEV;
if (line >= wch_ser_port_total_cnt) {
goto fail;
}
state = ser_get(drv, line);
if (IS_ERR(state)) {
retval = PTR_ERR(state);
goto fail;
}
if (!state) {
goto fail;
}
state->port->state = state;
tty->driver_data = state;
state->info->tty = tty;
if (tty_hung_up_p(filp)) {
retval = -EAGAIN;
state->count--;
up(&state->sem);
goto fail;
}
tty_port_tty_set(&state->port0, tty); // 20140606 add
retval = ser_startup(state, 0);
if (retval == 0) {
retval = ser_block_til_ready(filp, state);
}
up(&state->sem);
if (retval == 0 && !(state->info->flags & WCH_UIF_NORMAL_ACTIVE)) {
state->info->flags |= WCH_UIF_NORMAL_ACTIVE;
ser_update_termios(state);
}
try_module_get(THIS_MODULE);
}
fail:
return retval;
}
static void ser_close(struct tty_struct *tty, struct file *filp)
{
struct ser_state *state = tty->driver_data;
struct ser_port *port;
int line = WCH_SER_DEVNUM(tty);
if (line < wch_ser_port_total_cnt) {
if (!state || !state->port) {
return;
}
port = state->port;
down(&state->sem);
if (tty_hung_up_p(filp)) {
goto done;
}
if ((tty->count == 1) && (state->count != 1)) {
printk("WCH Info : bad serial port count; tty->count is 1, state->count is %d\n", state->count);
state->count = 1;
}
if (--state->count < 0) {
printk("WCH Info : bad serial port count for ttyWCH%d: %d\n", port->line, state->count);
state->count = 0;
}
if (state->count) {
goto done;
}
tty->closing = 1;
if (state->closing_wait != WCH_USF_CLOSING_WAIT_NONE) {
tty_wait_until_sent(tty, state->closing_wait);
}
if (state->info->flags & WCH_UIF_INITIALIZED) {
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
wch_ser_stop_rx(port);
spin_unlock_irqrestore(&port->lock, flags);
ser_wait_until_sent(tty, port->timeout);
}
ser_shutdown(state);
ser_flush_buffer(tty);
tty_ldisc_flush(tty);
/*
if (tty->ldisc->ops->flush_buffer) {
tty->ldisc->ops->flush_buffer(tty);
}
*/
tty->closing = 0;
if (state->info->tty)
state->info->tty = NULL;
if (state->port0.tty)
tty_port_tty_set(&state->port0, NULL); // 20140606 add
if (state->info->blocked_open) {
if (state->close_delay) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(state->close_delay);
}
}
state->info->flags &= ~WCH_UIF_NORMAL_ACTIVE;
wake_up_interruptible(&state->info->open_wait);
done:
up(&state->sem);
module_put(THIS_MODULE);
}
}
static void wch_ser_set_mctrl(struct ser_port *port, unsigned int mctrl)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
unsigned char mcr = 0;
if (mctrl & TIOCM_RTS) {
mcr |= UART_MCR_RTS;
}
if (mctrl & TIOCM_DTR) {
mcr |= UART_MCR_DTR;
}
if (mctrl & TIOCM_OUT1) {
mcr |= UART_MCR_OUT1;
}
if (mctrl & TIOCM_OUT2) {
mcr |= UART_MCR_OUT2;
}
if (mctrl & TIOCM_LOOP) {
mcr |= UART_MCR_LOOP;
}
mcr = (mcr & sp->mcr_mask) | sp->mcr_force | sp->mcr;
WRITE_UART_MCR(sp, mcr);
}
static unsigned int wch_ser_tx_empty(struct ser_port *port)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
unsigned long flags;
unsigned int ret;
spin_lock_irqsave(&sp->port.lock, flags);
ret = READ_UART_LSR(sp) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
spin_unlock_irqrestore(&sp->port.lock, flags);
return ret;
}
static unsigned int wch_ser_get_mctrl(struct ser_port *port)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
unsigned long flags;
unsigned char status;
unsigned int ret = 0;
spin_lock_irqsave(&sp->port.lock, flags);
status = READ_UART_MSR(sp);
spin_unlock_irqrestore(&sp->port.lock, flags);
if (status & UART_MSR_DCD) {
ret |= TIOCM_CAR;
}
if (status & UART_MSR_RI) {
ret |= TIOCM_RNG;
}
if (status & UART_MSR_DSR) {
ret |= TIOCM_DSR;
}
if (status & UART_MSR_CTS) {
ret |= TIOCM_CTS;
}
return ret;
}
static void wch_ser_stop_tx(struct ser_port *port, unsigned int tty_stop)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
if (sp->ier & UART_IER_THRI) {
sp->ier &= ~UART_IER_THRI;
WRITE_UART_IER(sp, sp->ier);
}
}
static void wch_ser_start_tx(struct ser_port *port, unsigned int tty_start)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
if (!(sp->ier & UART_IER_THRI)) {
sp->ier |= UART_IER_THRI;
WRITE_UART_IER(sp, sp->ier);
}
}
static void wch_ser_stop_rx(struct ser_port *port)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
sp->ier &= ~UART_IER_RLSI;
sp->port.read_status_mask &= ~UART_LSR_DR;
WRITE_UART_IER(sp, sp->ier);
}
static void wch_ser_enable_ms(struct ser_port *port)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
sp->ier |= UART_IER_MSI;
WRITE_UART_IER(sp, sp->ier);
}
static void wch_ser_break_ctl(struct ser_port *port, int break_state)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
unsigned long flags;
spin_lock_irqsave(&sp->port.lock, flags);
if (break_state == -1) {
sp->lcr |= UART_LCR_SBC;
} else {
sp->lcr &= ~UART_LCR_SBC;
}
WRITE_UART_LCR(sp, sp->lcr);
spin_unlock_irqrestore(&sp->port.lock, flags);
}
static int wch_ser_startup(struct ser_port *port)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
sp->capabilities = wch_uart_config[sp->port.type].flags;
sp->mcr = 0;
if (sp->capabilities & UART_CLEAR_FIFO) {
WRITE_UART_FCR(sp, UART_FCR_ENABLE_FIFO);
WRITE_UART_FCR(sp, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
WRITE_UART_FCR(sp, 0);
}
(void)READ_UART_LSR(sp);
(void)READ_UART_RX(sp);
(void)READ_UART_IIR(sp);
(void)READ_UART_MSR(sp);
if (!(sp->port.flags & WCH_UPF_BUGGY_UART) && (READ_UART_LSR(sp) == 0xff)) {
printk("WCH Info : ttyWCH%d: LSR safety check engaged!\n", sp->port.line);
return -ENODEV;
}
WRITE_UART_LCR(sp, UART_LCR_WLEN8);
sp->ier = UART_IER_RLSI | UART_IER_RDI;
WRITE_UART_IER(sp, sp->ier);
(void)READ_UART_LSR(sp);
(void)READ_UART_RX(sp);
(void)READ_UART_IIR(sp);
(void)READ_UART_MSR(sp);
return 0;
}
static void wch_ser_shutdown(struct ser_port *port)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
sp->ier = 0;
WRITE_UART_IER(sp, 0);
WRITE_UART_LCR(sp, READ_UART_LCR(sp) & ~UART_LCR_SBC);
WRITE_UART_FCR(sp, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
WRITE_UART_FCR(sp, 0);
(void)READ_UART_RX(sp);
}
static unsigned int wch_ser_get_divisor(struct ser_port *port, unsigned int baud, bool btwicefreq)
{
unsigned int quot;
if ((port->flags & WCH_UPF_MAGIC_MULTIPLIER) && baud == (port->uartclk / 4)) {
quot = 0x8001;
} else if ((port->flags & WCH_UPF_MAGIC_MULTIPLIER) && baud == (port->uartclk / 8)) {
quot = 0x8002;
} else {
quot = ser_get_divisor(port, baud, btwicefreq);
}
return quot;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 1, 0)
static void wch_ser_set_termios(struct ser_port *port, struct WCHTERMIOS *termios, const struct WCHTERMIOS *old)
#else
static void wch_ser_set_termios(struct ser_port *port, struct WCHTERMIOS *termios, struct WCHTERMIOS *old)
#endif
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
unsigned char cval;
unsigned char fcr = 0;
unsigned long flags;
unsigned int baud;
unsigned int quot;
unsigned char ier;
switch (termios->c_cflag & CSIZE) {
case CS5:
cval = 0x00;
break;
case CS6:
cval = 0x01;
break;
case CS7:
cval = 0x02;
break;
default:
case CS8:
cval = 0x03;
break;
}
if (termios->c_cflag & CSTOPB) {
cval |= 0x04;
}
if (termios->c_cflag & PARENB) {
cval |= UART_LCR_PARITY;
}
if (!(termios->c_cflag & PARODD)) {
cval |= UART_LCR_EPAR;
}
#ifdef CMSPAR
if (termios->c_cflag & CMSPAR) {
cval |= UART_LCR_SPAR;
}
#endif
/* fixed on 20210706 */
if (port->bspe1stport == true) {
baud = ser_get_baud_rate(port, termios, old, port->uartclk / 16 / 65536, port->uartclk / 16);
if (baud <= 0)
baud = 9600;
quot = wch_ser_get_divisor(port, baud, true);
sp->ier &= ~(1 << 5);
ier = READ_UART_IER(sp + 1);
WRITE_UART_IER(sp + 1, ier | (1 << 5));
} else if (port->bext1stport == false) {
baud = ser_get_baud_rate(port, termios, old, port->uartclk / 16 / 65536, port->uartclk / 16);
if (baud <= 0)
baud = 9600;
quot = wch_ser_get_divisor(port, baud, true);
sp->ier |= 1 << 5;
} else {
baud = ser_get_baud_rate(port, termios, old, port->uartclk / 24 / 16 / 65536, port->uartclk / 24 / 16);
if (baud <= 0)
baud = 9600;
quot = wch_ser_get_divisor(port, baud, false);
sp->ier &= ~(1 << 5);
}
if (sp->capabilities & UART_USE_FIFO) {
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10;
}
sp->mcr &= ~UART_MCR_AFE;
if (termios->c_cflag & CRTSCTS) {
sp->mcr |= UART_MCR_AFE;
sp->mcr |= UART_MCR_RTS;
port->hardflow = true;
} else {
sp->mcr &= ~UART_MCR_AFE;
sp->mcr &= ~UART_MCR_RTS;
port->hardflow = false;
}
/* added on 20200928 */
sp->mcr |= UART_MCR_OUT2;
spin_lock_irqsave(&sp->port.lock, flags);
ser_update_timeout(port, termios->c_cflag, baud);
sp->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
if (termios->c_iflag & INPCK) {
sp->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
}
if (termios->c_iflag & (BRKINT | PARMRK)) {
sp->port.read_status_mask |= UART_LSR_BI;
}
sp->port.ignore_status_mask = 0;
if (termios->c_iflag & IGNPAR) {
sp->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
}
if (termios->c_iflag & IGNBRK) {
sp->port.ignore_status_mask |= UART_LSR_BI;
if (termios->c_iflag & IGNPAR) {
sp->port.ignore_status_mask |= UART_LSR_OE;
}
}
if ((termios->c_cflag & CREAD) == 0) {
sp->port.ignore_status_mask |= UART_LSR_DR;
}
sp->ier &= ~UART_IER_MSI;
if (WCH_ENABLE_MS(&sp->port, termios->c_cflag)) {
sp->ier |= UART_IER_MSI;
}
WRITE_UART_LCR(sp, cval | UART_LCR_DLAB);
WRITE_UART_DLL(sp, quot & 0xff);
WRITE_UART_DLM(sp, quot >> 8);
WRITE_UART_FCR(sp, fcr);
WRITE_UART_LCR(sp, cval);
sp->lcr = cval;
wch_ser_set_mctrl(&sp->port, sp->port.mctrl);
WRITE_UART_IER(sp, sp->ier);
spin_unlock_irqrestore(&sp->port.lock, flags);
}
static void wch_ser_timeout(struct timer_list *t)
{
struct wch_ser_port *sp = from_timer(sp, t, timer);
unsigned int timeout;
unsigned int iir;
iir = READ_UART_IIR(sp);
if (!(iir & UART_IIR_NO_INT)) {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
timeout = sp->port.timeout;
timeout = timeout > 6 ? (timeout / 2 - 2) : 1;
mod_timer(&sp->timer, jiffies + timeout);
}
static _INLINE_ void ser_receive_chars(struct wch_ser_port *sp, unsigned char *status, unsigned char iir)
{
struct tty_struct *tty = sp->port.info->tty;
unsigned char ch = 0;
int max_count = 256;
unsigned char lsr = *status;
unsigned char flag;
unsigned char rbuf[256];
int readcont = 0;
int count;
do {
if (iir == UART_IIR_RDI) {
READ_UART_RX_BUFFER(sp, rbuf, sp->port.rx_trigger);
sp->port.icount.rx += sp->port.rx_trigger;
count = sp->port.rx_trigger;
readcont = 1;
iir = 0;
} else {
ch = READ_UART_RX(sp);
sp->port.icount.rx++;
readcont = 0;
}
flag = TTY_NORMAL;
if (unlikely(lsr & (UART_LSR_BI | UART_LSR_PE | UART_LSR_FE | UART_LSR_OE)))
{
if (lsr & UART_LSR_BI) {
lsr &= ~(UART_LSR_FE | UART_LSR_PE);
sp->port.icount.brk++;
if (ser_handle_break(&sp->port)) {
goto ignore_char;
}
} else if (lsr & UART_LSR_PE) {
sp->port.icount.parity++;
} else if (lsr & UART_LSR_FE) {
sp->port.icount.frame++;
}
if (lsr & UART_LSR_OE) {
sp->port.icount.overrun++;
}
lsr &= sp->port.read_status_mask;
if (lsr & UART_LSR_BI) {
flag = TTY_BREAK;
} else if (lsr & UART_LSR_PE) {
flag = TTY_PARITY;
} else if (lsr & UART_LSR_FE) {
flag = TTY_FRAME;
}
}
if ((I_IXOFF(tty)) || I_IXON(tty)) {
if (ch == START_CHAR(tty)) {
tty->flow.stopped = 0;
wch_ser_start_tx(&sp->port, 1);
goto ignore_char;
} else if (ch == STOP_CHAR(tty)) {
tty->flow.stopped = 1;
wch_ser_stop_tx(&sp->port, 1);
goto ignore_char;
}
}
if (readcont)
ser_insert_buffer(&sp->port, lsr, UART_LSR_OE, rbuf, count, flag);
else
ser_insert_char(&sp->port, lsr, UART_LSR_OE, ch, flag);
ignore_char:
lsr = READ_UART_LSR(sp);
if (lsr == 0xff) {
lsr = 0x01;
}
} while (lsr & (UART_LSR_DR | UART_LSR_BI) && (max_count-- > 0));
spin_unlock(&sp->port.lock);
tty_flip_buffer_push(&(sp->port.state->port0));
spin_lock(&sp->port.lock);
*status = lsr;
}
static _INLINE_ void ser_transmit_chars(struct wch_ser_port *sp)
{
struct circ_buf *xmit = &sp->port.info->xmit;
int count;
if ((!sp) || (!sp->port.iobase)) {
return;
}
if (!sp->port.info) {
return;
}
if (!xmit) {
return;
}
if (sp->port.x_char) {
WRITE_UART_TX(sp, sp->port.x_char);
sp->port.icount.tx++;
sp->port.x_char = 0;
return;
}
if (ser_circ_empty(xmit) || ser_tx_stopped(&sp->port)) {
wch_ser_stop_tx(&sp->port, 0);
return;
}
count = sp->port.fifosize / 2;
do {
WRITE_UART_TX(sp, xmit->buf[xmit->tail]);
xmit->tail = (xmit->tail + 1) & (WCH_UART_XMIT_SIZE - 1);
sp->port.icount.tx++;
if (ser_circ_empty(xmit)) {
break;
}
} while (--count > 0);
if (ser_circ_chars_pending(xmit) < WAKEUP_CHARS_SER) {
ser_write_wakeup(&sp->port);
}
/*
if (ser_circ_empty(xmit))
{
wch_ser_stop_tx(&sp->port, 0);
}
*/
}
static _INLINE_ void ser_check_modem_status(struct wch_ser_port *sp, unsigned char status)
{
if ((status & UART_MSR_ANY_DELTA) == 0) {
return;
}
if (!sp->port.info) {
return;
}
if (status & UART_MSR_TERI) {
sp->port.icount.rng++;
}
if (status & UART_MSR_DDSR) {
sp->port.icount.dsr++;
}
if (status & UART_MSR_DDCD) {
ser_handle_dcd_change(&sp->port, status & UART_MSR_DCD);
}
if (status & UART_MSR_DCTS) {
ser_handle_cts_change(&sp->port, status & UART_MSR_CTS);
}
wake_up_interruptible(&sp->port.info->delta_msr_wait);
}
static _INLINE_ void ser_handle_port(struct wch_ser_port *sp, unsigned char iir)
{
unsigned char lsr = READ_UART_LSR(sp);
unsigned char msr = 0;
if (lsr == 0xff) {
lsr = 0x01;
}
if ((iir == UART_IIR_RLSI) || (iir == UART_IIR_CTO) || (iir == UART_IIR_RDI)) {
ser_receive_chars(sp, &lsr, iir);
}
if ((iir == UART_IIR_THRI) && (lsr & UART_LSR_THRE)) {
ser_transmit_chars(sp);
}
msr = READ_UART_MSR(sp);
if (msr & UART_MSR_ANY_DELTA) {
ser_check_modem_status(sp, msr);
}
}
static struct tty_operations wch_tty_ops = {
.open = ser_open,
.close = ser_close,
.write = ser_write,
.put_char = ser_put_char,
.flush_chars = ser_flush_chars,
.write_room = ser_write_room,
.chars_in_buffer = ser_chars_in_buffer,
.flush_buffer = ser_flush_buffer,
.ioctl = ser_ioctl,
.throttle = ser_throttle,
.unthrottle = ser_unthrottle,
.send_xchar = ser_send_xchar,
.set_termios = ser_set_termios,
.stop = ser_stop,
.start = ser_start,
.hangup = ser_hangup,
.break_ctl = ser_break_ctl,
.wait_until_sent = ser_wait_until_sent,
.tiocmget = ser_tiocmget,
.tiocmset = ser_tiocmset,
};
extern int wch_ser_register_driver(struct ser_driver *drv)
{
struct tty_driver *normal = NULL;
int i;
int ret = 0;
#if WCH_DBG
printk("%s : %s\n", __FILE__, __FUNCTION__);
#endif
drv->nr = wch_ser_port_total_cnt;
drv->state = kmalloc(sizeof(struct ser_state) * drv->nr, GFP_KERNEL);
ret = -ENOMEM;
if (!drv->state) {
printk("WCH Error: Allocate memory fail !\n\n");
goto out;
}
memset(drv->state, 0, sizeof(struct ser_state) * drv->nr);
normal = tty_alloc_driver(drv->nr, TTY_DRIVER_REAL_RAW);
if (!normal) {
printk("WCH Error: Allocate tty driver fail !\n\n");
goto out;
}
drv->tty_driver = normal;
normal->name = drv->dev_name;
normal->major = drv->major;
normal->minor_start = drv->minor;
normal->num = wch_ser_port_total_cnt;
normal->type = TTY_DRIVER_TYPE_SERIAL;
normal->subtype = SERIAL_TYPE_NORMAL;
normal->init_termios = tty_std_termios;
normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
normal->init_termios.c_iflag = 0;
normal->driver_state = drv;
tty_set_operations(normal, &wch_tty_ops);
for (i = 0; i < drv->nr; i++) {
struct ser_state *state = drv->state + i;
if (!state) {
ret = -1;
printk("WCH Error: Memory error !\n\n");
goto out;
}
state->close_delay = 5 * HZ / 100;
state->closing_wait = 3 * HZ;
tty_port_init(&state->port0);
sema_init(&state->sem, 1);
}
kref_init(&normal->kref);
ret = tty_register_driver(normal);
if (ret < 0) {
printk("WCH Error: Register tty driver fail !\n\n");
goto out;
}
out:
if (ret < 0) {
tty_driver_kref_put(normal);
kfree(drv->state);
}
return (ret);
}
extern void wch_ser_unregister_driver(struct ser_driver *drv)
{
struct tty_driver *normal;
#if WCH_DBG
printk("%s : %s\n", __FILE__, __FUNCTION__);
#endif
normal = drv->tty_driver;
if (!normal) {
return;
}
tty_unregister_driver(normal);
tty_driver_kref_put(normal);
drv->tty_driver = NULL;
if (drv->state) {
kfree(drv->state);
}
}
static void wch_ser_request_io(struct ser_port *port)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
switch (sp->port.iotype) {
case WCH_UPIO_PORT:
request_region(sp->port.iobase, WCH_SER_ADDRESS_LENGTH, "wch_ser");
break;
case WCH_UPIO_MEM:
break;
default:
break;
}
}
static void wch_ser_configure_port(struct ser_driver *drv, struct ser_state *state, struct ser_port *port)
{
unsigned long flags;
if (!port->iobase) {
return;
}
flags = WCH_UART_CONFIG_TYPE;
if (port->type != PORT_UNKNOWN) {
wch_ser_request_io(port);
spin_lock_irqsave(&port->lock, flags);
wch_ser_set_mctrl(port, 0);
spin_unlock_irqrestore(&port->lock, flags);
}
}
static int wch_ser_add_one_port(struct ser_driver *drv, struct ser_port *port)
{
struct ser_state *state = NULL;
int ret = 0;
if (port->line >= drv->nr) {
return -EINVAL;
}
state = drv->state + port->line;
down(&ser_port_sem);
if (state->port) {
ret = -EINVAL;
goto out;
}
state->port = port;
port->info = state->info;
// port->state = state;
drv->tty_driver->ports[port->line] = &state->port0;
wch_ser_configure_port(drv, state, port);
out:
up(&ser_port_sem);
return ret;
}
extern int wch_ser_register_ports(struct ser_driver *drv)
{
int i;
int ret;
#if WCH_DBG
printk("%s : %s\n", __FILE__, __FUNCTION__);
#endif
for (i = 0; i < wch_ser_port_total_cnt; i++) {
struct wch_ser_port *sp = &wch_ser_table[i];
if (!sp) {
return -1;
}
sp->port.line = i;
{
timer_setup(&sp->timer, wch_ser_timeout, 0);
sp->mcr_mask = ~0;
sp->mcr_force = 0;
ret = wch_ser_add_one_port(drv, &sp->port);
if (ret != 0) {
return ret;
}
}
printk("Setup ttyWCH%d - PCIe port: port %lx, irq %d, type %d\n", sp->port.line, sp->port.iobase, sp->port.irq,
sp->port.iotype);
}
return 0;
}
static void wch_ser_release_io(struct ser_port *port)
{
struct wch_ser_port *sp = (struct wch_ser_port *)port;
switch (sp->port.iotype) {
case WCH_UPIO_PORT:
release_region(sp->port.iobase, WCH_SER_ADDRESS_LENGTH);
break;
case WCH_UPIO_MEM:
break;
default:
break;
}
}
static void wch_ser_unconfigure_port(struct ser_driver *drv, struct ser_state *state)
{
struct ser_port *port = state->port;
struct ser_info *info = state->info;
if (info && info->tty) {
tty_hangup(info->tty);
}
down(&state->sem);
state->info = NULL;
if (port->type != PORT_UNKNOWN) {
wch_ser_release_io(port);
}
port->type = PORT_UNKNOWN;
if (info) {
tasklet_kill(&info->tlet);
kfree(info);
}
up(&state->sem);
}
static int wch_ser_remove_one_port(struct ser_driver *drv, struct ser_port *port)
{
struct ser_state *state = drv->state + port->line;
if (state->port != port) {
printk("WCH Info : Removing wrong port: %p != %p\n\n", state->port, port);
}
down(&ser_port_sem);
wch_ser_unconfigure_port(drv, state);
state->port = NULL;
drv->tty_driver->ports[port->line] = NULL;
up(&ser_port_sem);
return 0;
}
extern void wch_ser_unregister_ports(struct ser_driver *drv)
{
int i;
#if WCH_DBG
printk("%s : %s\n", __FILE__, __FUNCTION__);
#endif
for (i = 0; i < wch_ser_port_total_cnt; i++) {
struct wch_ser_port *sp = &wch_ser_table[i];
if (sp->port.iobase) {
wch_ser_remove_one_port(drv, &sp->port);
}
}
}
extern int wch_ser_interrupt(struct wch_board *sb, struct wch_ser_port *first_sp)
{
struct wch_ser_port *sp;
int i;
int max;
unsigned long irqbits;
unsigned char ch438irqbits;
unsigned long bits;
int pass_counter = 0;
unsigned char iir;
max = sb->ser_ports;
if ((first_sp->port.port_flag & PORTFLAG_REMAP) == PORTFLAG_REMAP) { // CH352_2S CH352_1S1P
while (1) {
for (i = 0; i < max; i++) {
sp = first_sp + i;
if (!sp->port.iobase) {
continue;
}
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
if (pass_counter++ > INTERRUPT_COUNT) {
break;
}
}
} else if ((first_sp->port.pb_info.vendor_id == VENDOR_ID_WCH_PCI) &&
(first_sp->port.pb_info.device_id == DEVICE_ID_WCH_CH353_4S)) { // CH353_4S
while (1) {
irqbits = READ_INTERRUPT_VECTOR_BYTE(first_sp) & first_sp->port.vector_mask;
if (irqbits == 0x0000) {
break;
}
for (i = 0, bits = 1; i < max; i++, bits <<= 1) {
if (i == 0x02) {
bits <<= 2;
}
if (!(bits & irqbits)) {
continue;
}
sp = first_sp + i;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
if (pass_counter++ > INTERRUPT_COUNT) {
break;
}
}
} else if ((first_sp->port.pb_info.vendor_id == VENDOR_ID_WCH_PCI) &&
(first_sp->port.pb_info.device_id == DEVICE_ID_WCH_CH359_16S)) { // CH359_16S
while (1) {
irqbits = READ_INTERRUPT_VECTOR_WORD(first_sp) & first_sp->port.vector_mask;
if (irqbits == 0x0000) {
break;
}
for (i = 0, bits = 1; i < max; i++, bits <<= 1) {
if (!(bits & irqbits)) {
continue;
}
sp = first_sp + i;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
if (pass_counter++ > INTERRUPT_COUNT) {
break;
}
}
} else if ((first_sp->port.pb_info.vendor_id == VENDOR_ID_WCH_PCIE &&
first_sp->port.pb_info.device_id == DEVICE_ID_WCH_CH384_28S) ||
(first_sp->port.pb_info.vendor_id == VENDOR_ID_WCH_PCIE &&
first_sp->port.pb_info.device_id == DEVICE_ID_WCH_CH384_8S)) { // CH384_8S CH384_28S
while (1) {
irqbits = READ_INTERRUPT_VECTOR_DWORD(first_sp) & first_sp->port.vector_mask;
if ((irqbits & 0x80000000) != 0 && (irqbits & 0x40000000) != 0 && (irqbits & 0x20000000) != 0 &&
(irqbits & 0x00000100) == 0 && (irqbits & 0x00000200) == 0 && (irqbits & 0x00000400) == 0 &&
(irqbits & 0x00000800) == 0) {
break;
}
/* handle CH438 #3 */
if ((irqbits & 0x80000000) == 0) {
sp = first_sp + 0x14;
ch438irqbits = READ_INTERRUPT_VECTOR_BYTE(sp) & sp->port.vector_mask;
if (ch438irqbits != 0) {
for (i = 0; i < 0x08; i++) {
if (ch438irqbits & (1 << i)) {
sp += i;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
}
}
}
/* handle CH438 #2 */
if ((irqbits & 0x40000000) == 0) {
sp = first_sp + 0x0C;
ch438irqbits = READ_INTERRUPT_VECTOR_BYTE(sp) & sp->port.vector_mask;
if (ch438irqbits != 0) {
for (i = 0; i < 0x08; i++) {
if (ch438irqbits & (1 << i)) {
sp += i;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
}
}
}
/* handle CH438 #1 */
if ((irqbits & 0x20000000) == 0) {
/* CH384_28S */
if (first_sp->port.pb_info.device_id == DEVICE_ID_WCH_CH384_28S) {
sp = first_sp + 0x04;
} else {
/* CH384_8S */
sp = first_sp;
}
ch438irqbits = READ_INTERRUPT_VECTOR_BYTE(sp) & sp->port.vector_mask;
if (ch438irqbits != 0) {
for (i = 0; i < 0x08; i++) {
if (ch438irqbits & (1 << i)) {
sp += i;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
}
}
}
if ((irqbits & 0x00000100) == 0x00000100) {
sp = first_sp;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
if ((irqbits & 0x00000200) == 0x00000200) {
sp = first_sp + 0x01;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
if ((irqbits & 0x00000400) == 0x00000400) {
sp = first_sp + 0x02;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
if ((irqbits & 0x00000800) == 0x00000800) {
sp = first_sp + 0x03;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
if (pass_counter++ > INTERRUPT_COUNT) {
break;
}
}
} else if ((first_sp->port.pb_info.vendor_id == VENDOR_ID_WCH_PCI) &&
(first_sp->port.pb_info.device_id == DEVICE_ID_WCH_CH365_32S)) {
while (1) {
if ((inb(first_sp->port.chip_iobase + 0xF8) & 0x04) != 0x04) {
break;
}
irqbits = inb(first_sp->port.chip_iobase) & first_sp->port.vector_mask;
if (irqbits == 0xFF) {
break;
}
if ((irqbits & 0x00000010) == 0) { // first ch438 irq
for (i = 0, bits = 1; i < 0x08; i++, bits <<= 1) {
sp = first_sp + i;
ch438irqbits = readb(sp->port.board_membase + 0x100 + 0x4F) & sp->port.vector_mask;
if (ch438irqbits == 0x00000000) {
break;
}
if (!(bits & ch438irqbits)) {
continue;
} else {
break;
}
}
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
outb(inb(sp->port.chip_iobase + 0xF8) & 0xFB, sp->port.chip_iobase + 0xF8);
} else if ((irqbits & 0x00000020) == 0) {
for (i = 0, bits = 1; i < 0x08; i++, bits <<= 1) {
sp = first_sp + i + 0x08;
ch438irqbits = readb(sp->port.board_membase + 0x180 + 0x4F) & sp->port.vector_mask;
if (ch438irqbits == 0x00000000) {
break;
}
if (!(bits & ch438irqbits)) {
continue;
} else {
break;
}
}
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
outb(inb(sp->port.chip_iobase + 0xF8) & 0xFB, sp->port.chip_iobase + 0xF8);
} else if ((irqbits & 0x00000040) == 0) {
for (i = 0, bits = 1; i < 0x08; i++, bits <<= 1) {
sp = first_sp + i + 0x10;
ch438irqbits = readb(sp->port.board_membase + 0x200 + 0x4F) & sp->port.vector_mask;
if (ch438irqbits == 0x00000000) {
break;
}
if (!(bits & ch438irqbits)) {
continue;
} else {
break;
}
}
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
outb(inb(sp->port.chip_iobase + 0xF8) & 0xFB, sp->port.chip_iobase + 0xF8);
} else if ((irqbits & 0x00000080) == 0) {
for (i = 0, bits = 1; i < 0x08; i++, bits <<= 1) {
sp = first_sp + i + 0x18;
ch438irqbits = readb(sp->port.board_membase + 0x280 + 0x4F) & sp->port.vector_mask;
if (ch438irqbits == 0x00000000) {
break;
}
if (!(bits & ch438irqbits)) {
continue;
} else {
break;
}
}
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
outb(inb(sp->port.chip_iobase + 0xF8) & 0xFB, sp->port.chip_iobase + 0xF8);
} else {
break;
}
if (pass_counter++ > INTERRUPT_COUNT) {
break;
}
}
} else { // CH353_2S1P CH353_2S1PAR CH355_4S CH356_4S1P CH356_8S CH358_4S1P CH358_8S CH382_2S1P CH384_4S1P
while (1) {
irqbits = READ_INTERRUPT_VECTOR_BYTE(first_sp) & first_sp->port.vector_mask;
if (irqbits == 0x0000) {
break;
}
for (i = 0, bits = 1; i < max; i++, bits <<= 1) {
if (!(bits & irqbits)) {
continue;
}
sp = first_sp + i;
iir = READ_UART_IIR(sp) & 0x0f;
if (iir & UART_IIR_NO_INT) {
continue;
} else {
spin_lock(&sp->port.lock);
ser_handle_port(sp, iir);
spin_unlock(&sp->port.lock);
}
}
if (pass_counter++ > INTERRUPT_COUNT) {
break;
}
}
}
return 0;
}
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