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serial: lantiq: Use readl/writel instead of ltq_r32/ltq_w32 

Previous implementation uses platform-dependent functions
ltq_w32()/ltq_r32() to access registers. Those functions are not
available for other SoC which uses the same IP.
Change to OS provided readl()/writel() and readb()/writeb(), so
that different SoCs can use the same driver.

Signed-off-by: Songjun Wu <songjun.wu@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Songjun Wu 2018-10-16 17:19:07 +08:00 committed by Greg Kroah-Hartman
parent fccf231ae9
commit 89b8bd2082
1 changed files with 19 additions and 19 deletions
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38
drivers/tty/serial/lantiq.c
View File

@ -145,7 +145,7 @@ lqasc_start_tx(struct uart_port *port)
static void
lqasc_stop_rx(struct uart_port *port)
{
ltq_w32(ASCWHBSTATE_CLRREN, port->membase + LTQ_ASC_WHBSTATE);
writel(ASCWHBSTATE_CLRREN, port->membase + LTQ_ASC_WHBSTATE);
}
static int
@ -154,11 +154,11 @@ lqasc_rx_chars(struct uart_port *port)
struct tty_port *tport = &port->state->port;
unsigned int ch = 0, rsr = 0, fifocnt;
fifocnt = ltq_r32(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_RXFFLMASK;
fifocnt = readl(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_RXFFLMASK;
while (fifocnt--) {
u8 flag = TTY_NORMAL;
ch = ltq_r8(port->membase + LTQ_ASC_RBUF);
rsr = (ltq_r32(port->membase + LTQ_ASC_STATE)
ch = readb(port->membase + LTQ_ASC_RBUF);
rsr = (readl(port->membase + LTQ_ASC_STATE)
& ASCSTATE_ANY) | UART_DUMMY_UER_RX;
tty_flip_buffer_push(tport);
port->icount.rx++;
@ -218,10 +218,10 @@ lqasc_tx_chars(struct uart_port *port)
return;
}
while (((ltq_r32(port->membase + LTQ_ASC_FSTAT) &
while (((readl(port->membase + LTQ_ASC_FSTAT) &
ASCFSTAT_TXFREEMASK) >> ASCFSTAT_TXFREEOFF) != 0) {
if (port->x_char) {
ltq_w8(port->x_char, port->membase + LTQ_ASC_TBUF);
writeb(port->x_char, port->membase + LTQ_ASC_TBUF);
port->icount.tx++;
port->x_char = 0;
continue;
@ -230,7 +230,7 @@ lqasc_tx_chars(struct uart_port *port)
if (uart_circ_empty(xmit))
break;
ltq_w8(port->state->xmit.buf[port->state->xmit.tail],
writeb(port->state->xmit.buf[port->state->xmit.tail],
port->membase + LTQ_ASC_TBUF);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
@ -246,7 +246,7 @@ lqasc_tx_int(int irq, void *_port)
unsigned long flags;
struct uart_port *port = (struct uart_port *)_port;
spin_lock_irqsave(&ltq_asc_lock, flags);
ltq_w32(ASC_IRNCR_TIR, port->membase + LTQ_ASC_IRNCR);
writel(ASC_IRNCR_TIR, port->membase + LTQ_ASC_IRNCR);
spin_unlock_irqrestore(&ltq_asc_lock, flags);
lqasc_start_tx(port);
return IRQ_HANDLED;
@ -271,7 +271,7 @@ lqasc_rx_int(int irq, void *_port)
unsigned long flags;
struct uart_port *port = (struct uart_port *)_port;
spin_lock_irqsave(&ltq_asc_lock, flags);
ltq_w32(ASC_IRNCR_RIR, port->membase + LTQ_ASC_IRNCR);
writel(ASC_IRNCR_RIR, port->membase + LTQ_ASC_IRNCR);
lqasc_rx_chars(port);
spin_unlock_irqrestore(&ltq_asc_lock, flags);
return IRQ_HANDLED;
@ -281,7 +281,7 @@ static unsigned int
lqasc_tx_empty(struct uart_port *port)
{
int status;
status = ltq_r32(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_TXFFLMASK;
status = readl(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_TXFFLMASK;
return status ? 0 : TIOCSER_TEMT;
}
@ -314,12 +314,12 @@ lqasc_startup(struct uart_port *port)
asc_update_bits(ASCCLC_DISS | ASCCLC_RMCMASK, (1 << ASCCLC_RMCOFFSET),
port->membase + LTQ_ASC_CLC);
ltq_w32(0, port->membase + LTQ_ASC_PISEL);
ltq_w32(
writel(0, port->membase + LTQ_ASC_PISEL);
writel(
((TXFIFO_FL << ASCTXFCON_TXFITLOFF) & ASCTXFCON_TXFITLMASK) |
ASCTXFCON_TXFEN | ASCTXFCON_TXFFLU,
port->membase + LTQ_ASC_TXFCON);
ltq_w32(
writel(
((RXFIFO_FL << ASCRXFCON_RXFITLOFF) & ASCRXFCON_RXFITLMASK)
| ASCRXFCON_RXFEN | ASCRXFCON_RXFFLU,
port->membase + LTQ_ASC_RXFCON);
@ -351,7 +351,7 @@ lqasc_startup(struct uart_port *port)
goto err2;
}
ltq_w32(ASC_IRNREN_RX | ASC_IRNREN_ERR | ASC_IRNREN_TX,
writel(ASC_IRNREN_RX | ASC_IRNREN_ERR | ASC_IRNREN_TX,
port->membase + LTQ_ASC_IRNREN);
return 0;
@ -370,7 +370,7 @@ lqasc_shutdown(struct uart_port *port)
free_irq(ltq_port->rx_irq, port);
free_irq(ltq_port->err_irq, port);
ltq_w32(0, port->membase + LTQ_ASC_CON);
writel(0, port->membase + LTQ_ASC_CON);
asc_update_bits(ASCRXFCON_RXFEN, ASCRXFCON_RXFFLU,
port->membase + LTQ_ASC_RXFCON);
asc_update_bits(ASCTXFCON_TXFEN, ASCTXFCON_TXFFLU,
@ -462,13 +462,13 @@ lqasc_set_termios(struct uart_port *port,
asc_update_bits(ASCCON_BRS, 0, port->membase + LTQ_ASC_CON);
/* now we can write the new baudrate into the register */
ltq_w32(divisor, port->membase + LTQ_ASC_BG);
writel(divisor, port->membase + LTQ_ASC_BG);
/* turn the baudrate generator back on */
asc_update_bits(0, ASCCON_R, port->membase + LTQ_ASC_CON);
/* enable rx */
ltq_w32(ASCWHBSTATE_SETREN, port->membase + LTQ_ASC_WHBSTATE);
writel(ASCWHBSTATE_SETREN, port->membase + LTQ_ASC_WHBSTATE);
spin_unlock_irqrestore(&ltq_asc_lock, flags);
@ -579,10 +579,10 @@ lqasc_console_putchar(struct uart_port *port, int ch)
return;
do {
fifofree = (ltq_r32(port->membase + LTQ_ASC_FSTAT)
fifofree = (readl(port->membase + LTQ_ASC_FSTAT)
& ASCFSTAT_TXFREEMASK) >> ASCFSTAT_TXFREEOFF;
} while (fifofree == 0);
ltq_w8(ch, port->membase + LTQ_ASC_TBUF);
writeb(ch, port->membase + LTQ_ASC_TBUF);
}
static void lqasc_serial_port_write(struct uart_port *port, const char *s,