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drivers: tty: serial: sunzilog: fix formatting issues
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Fix checkpatch warnings:

    WARNING: Use #include <linux/io.h> instead of <asm/io.h>
    torvalds#38: FILE: drivers/tty/serial/sunzilog.c:38:
    +#include <asm/io.h>

    WARNING: line over 80 characters
    torvalds#109: FILE: drivers/tty/serial/sunzilog.c:109:
    +#define ZILOG_CHANNEL_FROM_PORT(PORT)	((struct zilog_channel __iomem *)((PORT)->membase))

    WARNING: line over 80 characters
    torvalds#116: FILE: drivers/tty/serial/sunzilog.c:116:
    +#define ZS_WANTS_MODEM_STATUS(UP)	((UP)->flags & SUNZILOG_FLAG_MODEM_STATUS)

    WARNING: line over 80 characters
    torvalds#179: FILE: drivers/tty/serial/sunzilog.c:179:
    +static int __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *regs)

    WARNING: Missing a blank line after declarations
    torvalds#188: FILE: drivers/tty/serial/sunzilog.c:188:
    +		unsigned char stat = read_zsreg(channel, R1);
    +		if (stat & ALL_SNT)

    ERROR: trailing whitespace
    torvalds#231: FILE: drivers/tty/serial/sunzilog.c:231:
    +^I$

    WARNING: braces {} are not necessary for any arm of this statement
    torvalds#276: FILE: drivers/tty/serial/sunzilog.c:276:
    +		if (ZS_TX_ACTIVE(up)) {
    [...]
    +		} else {
    [...]

    ERROR: else should follow close brace '}'
    torvalds#378: FILE: drivers/tty/serial/sunzilog.c:378:
    +			}
    +			else if (r1 & PAR_ERR)

    ERROR: code indent should use tabs where possible
    torvalds#397: FILE: drivers/tty/serial/sunzilog.c:397:
    +^I^I    ^Itty_insert_flip_char(port, ch, flag);$

    WARNING: please, no space before tabs
    torvalds#397: FILE: drivers/tty/serial/sunzilog.c:397:
    +^I^I    ^Itty_insert_flip_char(port, ch, flag);$

    WARNING: line over 80 characters
    torvalds#440: FILE: drivers/tty/serial/sunzilog.c:440:
    +		/* The Zilog just gives us an interrupt when DCD/CTS/etc. change.

    WARNING: line over 80 characters
    torvalds#441: FILE: drivers/tty/serial/sunzilog.c:441:
    +		 * But it does not tell us which bit has changed, we have to keep

    WARNING: Missing a blank line after declarations
    torvalds#464: FILE: drivers/tty/serial/sunzilog.c:464:
    +		unsigned char status = readb(&channel->control);
    +		ZSDELAY();

    WARNING: line over 80 characters
    torvalds#468: FILE: drivers/tty/serial/sunzilog.c:468:
    +		 * It can occur because of how we do serial console writes.  It would

    WARNING: line over 80 characters
    torvalds#469: FILE: drivers/tty/serial/sunzilog.c:469:
    +		 * be nice to transmit console writes just like we normally would for

    WARNING: line over 80 characters
    torvalds#470: FILE: drivers/tty/serial/sunzilog.c:470:
    +		 * a TTY line. (ie. buffered and TX interrupt driven).  That is not

    WARNING: line over 80 characters
    torvalds#471: FILE: drivers/tty/serial/sunzilog.c:471:
    +		 * easy because console writes cannot sleep.  One solution might be

    WARNING: line over 80 characters
    torvalds#593: FILE: drivers/tty/serial/sunzilog.c:593:
    +static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port)

    WARNING: plain inline is preferred over __inline__
    torvalds#593: FILE: drivers/tty/serial/sunzilog.c:593:
    +static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port)

    ERROR: trailing whitespace
    torvalds#664: FILE: drivers/tty/serial/sunzilog.c:664:
    +^I/* NOTE: Not subject to 'transmitter active' rule.  */ $

    ERROR: trailing whitespace
    torvalds#752: FILE: drivers/tty/serial/sunzilog.c:752:
    +^I^I/* NOTE: Not subject to 'transmitter active' rule.  */ $

    ERROR: trailing whitespace
    torvalds#779: FILE: drivers/tty/serial/sunzilog.c:779:
    +^I^I/* NOTE: Not subject to 'transmitter active' rule.  */ $

    WARNING: line over 80 characters
    torvalds#999: FILE: drivers/tty/serial/sunzilog.c:999:
    +static int sunzilog_verify_port(struct uart_port *port, struct serial_struct *ser)

    WARNING: Missing a blank line after declarations
    #1142: FILE: drivers/tty/serial/sunzilog.c:1142:
    +		unsigned char val = readb(&channel->control);
    +		if (val & Tx_BUF_EMP) {

    WARNING: Prefer [subsystem eg: netdev]_info([subsystem]dev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
    #1230: FILE: drivers/tty/serial/sunzilog.c:1230:
    +	printk(KERN_INFO "Console: ttyS%d (SunZilog zs%d)\n",

    WARNING: braces {} are not necessary for single statement blocks
    #1383: FILE: drivers/tty/serial/sunzilog.c:1383:
    +		if (__load_zsregs(channel, up->curregs)) {
    +			up->flags |= SUNZILOG_FLAG_ESCC;
    +		}

    WARNING: quoted string split across lines
    #1493: FILE: drivers/tty/serial/sunzilog.c:1493:
    +		dev_info(&op->dev, "Keyboard at MMIO 0x%llx (irq = %d) "
    +		       "is a %s\n",

    WARNING: quoted string split across lines
    #1497: FILE: drivers/tty/serial/sunzilog.c:1497:
    +		dev_info(&op->dev, "Mouse at MMIO 0x%llx (irq = %d) "
    +		       "is a %s\n",

    WARNING: Missing a blank line after declarations
    #1581: FILE: drivers/tty/serial/sunzilog.c:1581:
    +		struct uart_sunzilog_port *up = sunzilog_irq_chain;
    +		err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED,

    WARNING: line over 80 characters
    #1590: FILE: drivers/tty/serial/sunzilog.c:1590:
    +			/* printk (KERN_INFO "Enable IRQ for ZILOG Hardware %p\n", up); */

    WARNING: line over 80 characters
    #1627: FILE: drivers/tty/serial/sunzilog.c:1627:
    +			/* printk (KERN_INFO "Disable IRQ for ZILOG Hardware %p\n", up); */

    ERROR: trailing statements should be on next line
    #1248: FILE: drivers/tty/serial/sunzilog.c:1248:
    +	case B150: baud = 150; break;

    ERROR: trailing statements should be on next line
    #1249: FILE: drivers/tty/serial/sunzilog.c:1249:
    +	case B300: baud = 300; break;

    ERROR: trailing statements should be on next line
    #1250: FILE: drivers/tty/serial/sunzilog.c:1250:
    +	case B600: baud = 600; break;

    ERROR: trailing statements should be on next line
    #1251: FILE: drivers/tty/serial/sunzilog.c:1251:
    +	case B1200: baud = 1200; break;

    ERROR: trailing statements should be on next line
    #1252: FILE: drivers/tty/serial/sunzilog.c:1252:
    +	case B2400: baud = 2400; break;

    ERROR: trailing statements should be on next line
    #1253: FILE: drivers/tty/serial/sunzilog.c:1253:
    +	case B4800: baud = 4800; break;

    ERROR: trailing statements should be on next line
    #1254: FILE: drivers/tty/serial/sunzilog.c:1254:
    +	default: case B9600: baud = 9600; break;

    ERROR: trailing statements should be on next line
    #1255: FILE: drivers/tty/serial/sunzilog.c:1255:
    +	case B19200: baud = 19200; break;

    ERROR: trailing statements should be on next line
    #1256: FILE: drivers/tty/serial/sunzilog.c:1256:
    +	case B38400: baud = 38400; break;

Signed-off-by: Enrico Weigelt <[email protected]>
  • Loading branch information
@metux
metux committed Feb 4, 2021
1 parent 12ed292 commit b8ac089
Showing 1 changed file with 76 additions and 42 deletions.
118 changes: 76 additions & 42 deletions drivers/tty/serial/sunzilog.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -102,14 +102,17 @@ struct uart_sunzilog_port {

static void sunzilog_putchar(struct uart_port *port, int ch);

#define ZILOG_CHANNEL_FROM_PORT(PORT) ((struct zilog_channel __iomem *)((PORT)->membase))
#define UART_ZILOG(PORT) ((struct uart_sunzilog_port *)(PORT))
#define ZILOG_CHANNEL_FROM_PORT(PORT) \
((struct zilog_channel __iomem *)((PORT)->membase))
#define UART_ZILOG(PORT) \
((struct uart_sunzilog_port *)(PORT))

#define ZS_IS_KEYB(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_KEYB)
#define ZS_IS_MOUSE(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_MOUSE)
#define ZS_IS_CONS(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CONS)
#define ZS_IS_KGDB(UP) ((UP)->flags & SUNZILOG_FLAG_IS_KGDB)
#define ZS_WANTS_MODEM_STATUS(UP) ((UP)->flags & SUNZILOG_FLAG_MODEM_STATUS)
#define ZS_WANTS_MODEM_STATUS(UP) \
((UP)->flags & SUNZILOG_FLAG_MODEM_STATUS)
#define ZS_IS_CHANNEL_A(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CHANNEL_A)
#define ZS_REGS_HELD(UP) ((UP)->flags & SUNZILOG_FLAG_REGS_HELD)
#define ZS_TX_STOPPED(UP) ((UP)->flags & SUNZILOG_FLAG_TX_STOPPED)
Expand Down Expand Up @@ -172,7 +175,8 @@ static void sunzilog_clear_fifo(struct zilog_channel __iomem *channel)
/* This function must only be called when the TX is not busy. The UART
* port lock must be held and local interrupts disabled.
*/
static int __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *regs)
static int __load_zsregs(struct zilog_channel __iomem *channel,
unsigned char *regs)
{
int i;
int escc;
Expand All @@ -181,6 +185,7 @@ static int __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *r
/* Let pending transmits finish. */
for (i = 0; i < 1000; i++) {
unsigned char stat = read_zsreg(channel, R1);

if (stat & ALL_SNT)
break;
udelay(100);
Expand Down Expand Up @@ -224,7 +229,7 @@ static int __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *r
/* Lower and upper byte of baud rate generator divisor. */
write_zsreg(channel, R12, regs[R12]);
write_zsreg(channel, R13, regs[R13]);

/* Now rewrite R14, with BRENAB (if set). */
write_zsreg(channel, R14, regs[R14]);

Expand Down Expand Up @@ -269,11 +274,10 @@ static void sunzilog_maybe_update_regs(struct uart_sunzilog_port *up,
struct zilog_channel __iomem *channel)
{
if (!ZS_REGS_HELD(up)) {
if (ZS_TX_ACTIVE(up)) {
if (ZS_TX_ACTIVE(up))
up->flags |= SUNZILOG_FLAG_REGS_HELD;
} else {
else
__load_zsregs(channel, up->curregs);
}
}
}

Expand Down Expand Up @@ -370,8 +374,7 @@ sunzilog_receive_chars(struct uart_sunzilog_port *up,
up->port.icount.brk++;
if (uart_handle_break(&up->port))
continue;
}
else if (r1 & PAR_ERR)
} else if (r1 & PAR_ERR)
up->port.icount.parity++;
else if (r1 & CRC_ERR)
up->port.icount.frame++;
Expand All @@ -390,7 +393,7 @@ sunzilog_receive_chars(struct uart_sunzilog_port *up,

if (up->port.ignore_status_mask == 0xff ||
(r1 & up->port.ignore_status_mask) == 0) {
tty_insert_flip_char(port, ch, flag);
tty_insert_flip_char(port, ch, flag);
}
if (r1 & Rx_OVR)
tty_insert_flip_char(port, 0, TTY_OVERRUN);
Expand Down Expand Up @@ -433,9 +436,9 @@ static void sunzilog_status_handle(struct uart_sunzilog_port *up,
if (status & SYNC)
up->port.icount.dsr++;

/* The Zilog just gives us an interrupt when DCD/CTS/etc. change.
* But it does not tell us which bit has changed, we have to keep
* track of this ourselves.
/* The Zilog just gives us an interrupt when DCD/CTS/etc.
* change.But it does not tell us which bit has changed,
* we have to keep track of this ourselves.
*/
if ((status ^ up->prev_status) ^ DCD)
uart_handle_dcd_change(&up->port,
Expand All @@ -457,15 +460,17 @@ static void sunzilog_transmit_chars(struct uart_sunzilog_port *up,

if (ZS_IS_CONS(up)) {
unsigned char status = readb(&channel->control);

ZSDELAY();

/* TX still busy? Just wait for the next TX done interrupt.
*
* It can occur because of how we do serial console writes. It would
* be nice to transmit console writes just like we normally would for
* a TTY line. (ie. buffered and TX interrupt driven). That is not
* easy because console writes cannot sleep. One solution might be
* to poll on enough port->xmit space becoming free. -DaveM
* It can occur because of how we do serial console writes.
* It would be nice to transmit console writes just like we
* normally would for a TTY line. (ie. buffered and TX
* interrupt driven). That is not easy because console
* writes cannot sleep. One solution might be to poll on
* enough port->xmit space becoming free. -DaveM
*/
if (!(status & Tx_BUF_EMP))
return;
Expand Down Expand Up @@ -586,7 +591,8 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id)
/* A convenient way to quickly get R0 status. The caller must _not_ hold the
* port lock, it is acquired here.
*/
static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port)
static inline unsigned char
sunzilog_read_channel_status(struct uart_port *port)
{
struct zilog_channel __iomem *channel;
unsigned char status;
Expand Down Expand Up @@ -657,13 +663,13 @@ static void sunzilog_set_mctrl(struct uart_port *port, unsigned int mctrl)
else
clear_bits |= DTR;

/* NOTE: Not subject to 'transmitter active' rule. */
/* NOTE: Not subject to 'transmitter active' rule. */
up->curregs[R5] |= set_bits;
up->curregs[R5] &= ~clear_bits;
write_zsreg(channel, R5, up->curregs[R5]);
}

/* The port lock is held and interrupts are disabled. */
/* The port lock is held and interrupts are disabled. */
static void sunzilog_stop_tx(struct uart_port *port)
{
struct uart_sunzilog_port *up =
Expand Down Expand Up @@ -745,7 +751,7 @@ static void sunzilog_enable_ms(struct uart_port *port)
if (new_reg != up->curregs[R15]) {
up->curregs[R15] = new_reg;

/* NOTE: Not subject to 'transmitter active' rule. */
/* NOTE: Not subject to 'transmitter active' rule. */
write_zsreg(channel, R15, up->curregs[R15] & ~WR7pEN);
}
}
Expand All @@ -772,7 +778,7 @@ static void sunzilog_break_ctl(struct uart_port *port, int break_state)
if (new_reg != up->curregs[R5]) {
up->curregs[R5] = new_reg;

/* NOTE: Not subject to 'transmitter active' rule. */
/* NOTE: Not subject to 'transmitter active' rule. */
write_zsreg(channel, R5, up->curregs[R5]);
}

Expand Down Expand Up @@ -992,7 +998,8 @@ static void sunzilog_config_port(struct uart_port *port, int flags)
}

/* We do not support letting the user mess with the divisor, IRQ, etc. */
static int sunzilog_verify_port(struct uart_port *port, struct serial_struct *ser)
static int sunzilog_verify_port(struct uart_port *port,
struct serial_struct *ser)
{
return -EINVAL;
}
Expand Down Expand Up @@ -1135,6 +1142,7 @@ static void sunzilog_putchar(struct uart_port *port, int ch)
*/
do {
unsigned char val = readb(&channel->control);

if (val & Tx_BUF_EMP) {
ZSDELAY();
break;
Expand Down Expand Up @@ -1233,15 +1241,34 @@ static int __init sunzilog_console_setup(struct console *con, char *options)
* this hackish cflag thing is OK.
*/
switch (con->cflag & CBAUD) {
case B150: baud = 150; break;
case B300: baud = 300; break;
case B600: baud = 600; break;
case B1200: baud = 1200; break;
case B2400: baud = 2400; break;
case B4800: baud = 4800; break;
default: case B9600: baud = 9600; break;
case B19200: baud = 19200; break;
case B38400: baud = 38400; break;
case B150:
baud = 150;
break;
case B300:
baud = 300;
break;
case B600:
baud = 600;
break;
case B1200:
baud = 1200;
break;
case B2400:
baud = 2400;
break;
case B4800:
baud = 4800;
break;
default:
case B9600:
baud = 9600;
break;
case B19200:
baud = 19200;
break;
case B38400:
baud = 38400;
break;
}

brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR);
Expand Down Expand Up @@ -1376,9 +1403,9 @@ static void sunzilog_init_hw(struct uart_sunzilog_port *up)
up->curregs[R14] = BRSRC | BRENAB;
up->curregs[R15] = FIFOEN; /* Use FIFO if on ESCC */
up->curregs[R7p] = TxFIFO_LVL | RxFIFO_LVL;
if (__load_zsregs(channel, up->curregs)) {
if (__load_zsregs(channel, up->curregs))
up->flags |= SUNZILOG_FLAG_ESCC;
}

/* Only enable interrupts if an ISR handler available */
if (up->flags & SUNZILOG_FLAG_ISR_HANDLER)
up->curregs[R9] |= MIE;
Expand Down Expand Up @@ -1487,12 +1514,12 @@ static int zs_probe(struct platform_device *op)
}
uart_inst++;
} else {
dev_info(&op->dev, "Keyboard at MMIO 0x%llx (irq = %d) "
"is a %s\n",
dev_info(&op->dev,
"Keyboard at MMIO 0x%llx (irq = %d) is a %s\n",
(unsigned long long) up[0].port.mapbase,
op->archdata.irqs[0], sunzilog_type(&up[0].port));
dev_info(&op->dev, "Mouse at MMIO 0x%llx (irq = %d) "
"is a %s\n",
dev_info(&op->dev,
"Mouse at MMIO 0x%llx (irq = %d) is a %s\n",
(unsigned long long) up[1].port.mapbase,
op->archdata.irqs[0], sunzilog_type(&up[1].port));
kbm_inst++;
Expand Down Expand Up @@ -1576,6 +1603,7 @@ static int __init sunzilog_init(void)

if (zilog_irq) {
struct uart_sunzilog_port *up = sunzilog_irq_chain;

err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED,
"zs", sunzilog_irq_chain);
if (err)
Expand All @@ -1585,7 +1613,10 @@ static int __init sunzilog_init(void)
while (up) {
struct zilog_channel __iomem *channel;

/* printk (KERN_INFO "Enable IRQ for ZILOG Hardware %p\n", up); */
/* printk(KERN_INFO
* "Enable IRQ for ZILOG Hardware %p\n",
* up);
*/
channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
up->flags |= SUNZILOG_FLAG_ISR_HANDLER;
up->curregs[R9] |= MIE;
Expand Down Expand Up @@ -1622,7 +1653,10 @@ static void __exit sunzilog_exit(void)
while (up) {
struct zilog_channel __iomem *channel;

/* printk (KERN_INFO "Disable IRQ for ZILOG Hardware %p\n", up); */
/* printk(KERN_INFO
* "Disable IRQ for ZILOG Hardware %p\n",
* up);
*/
channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
up->flags &= ~SUNZILOG_FLAG_ISR_HANDLER;
up->curregs[R9] &= ~MIE;
Expand Down

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