/*
- * linux/drivers/char/amazon_asc.c
- *
* Driver for AMAZONASC serial ports
*
- * Copyright (C) 2004 Infineon IFAP DC COM CPE
- * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
- *
* Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
* Based on drivers/serial/serial_s3c2400.c
*
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * $Id: amazon_asc.c,v 1.2 2005/04/01 02:40:48 pliu Exp $
- *
- * This is a generic driver for AMAZONASC-type serial ports.
+ * Copyright (C) 2004 Infineon IFAP DC COM CPE
+ * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
*/
#include <linux/module.h>
#define PORT_AMAZONASC 111
-#if defined(CONFIG_SERIAL_AMAZONASC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
#define UART_NR 1
+#define UART_DUMMY_UER_RX 1
+
#define SERIAL_AMAZONASC_MAJOR TTY_MAJOR
#define CALLOUT_AMAZONASC_MAJOR TTYAUX_MAJOR
#define SERIAL_AMAZONASC_MINOR 64
#define SERIAL_AMAZONASC_NR UART_NR
+static void amazonasc_tx_chars(struct uart_port *port);
extern void prom_printf(const char * fmt, ...);
static struct uart_port amazonasc_ports[UART_NR];
static struct uart_driver amazonasc_reg;
-#ifdef CONFIG_SERIAL_AMAZONASC_CONSOLE /*SUPPORT_SYSRQ*/
-static struct console amazonasc_console;
-#endif
static unsigned int uartclk = 0;
-
-#define SET_BIT(reg, mask) *reg |= (mask)
-#define CLEAR_BIT(reg, mask) *reg &= (~mask)
-#define CLEAR_BITS(reg, mask) CLEAR_BIT(reg, mask)
-#define SET_BITS(reg, mask) SET_BIT(reg, mask)
-#define SET_BITFIELD(reg, mask, off, val) \
- {*reg &= (~mask); *reg |= (val << off);}
-
-static void amazonasc_tx_chars(struct uart_port *port);
-
-/* fake flag to indicate CREAD was not set -> throw away all bytes */
-#define UART_DUMMY_UER_RX 1
-
-/* macro to set the bit corresponding to an interrupt number */
-#define BIT_NO(irq) (1 << (irq - 64))
-
-#define SERIAL_DEBUG
-
extern unsigned int amazon_get_fpi_hz(void);
-static int tx_enabled = 0;
static void amazonasc_stop_tx(struct uart_port *port)
{
static void amazonasc_stop_rx(struct uart_port *port)
{
/* clear the RX enable bit */
- *AMAZON_ASC_WHBCON = ASCWHBCON_CLRREN;
+ amazon_writel(ASCWHBCON_CLRREN, AMAZON_ASC_WHBCON);
}
static void amazonasc_enable_ms(struct uart_port *port)
{
struct tty_struct *tty = port->info->tty;
unsigned int ch = 0, rsr = 0, fifocnt;
- unsigned long flags;
- fifocnt = *AMAZON_ASC_FSTAT & ASCFSTAT_RXFFLMASK;
+ fifocnt = amazon_readl(AMAZON_ASC_FSTAT) & ASCFSTAT_RXFFLMASK;
while (fifocnt--)
{
u8 flag = TTY_NORMAL;
- ch = *AMAZON_ASC_RBUF;
- rsr = (*AMAZON_ASC_CON & ASCCON_ANY) | UART_DUMMY_UER_RX;
+ ch = amazon_readl(AMAZON_ASC_RBUF);
+ rsr = (amazon_readl(AMAZON_ASC_CON) & ASCCON_ANY) | UART_DUMMY_UER_RX;
tty_flip_buffer_push(tty);
port->icount.rx++;
if (rsr & ASCCON_ANY) {
if (rsr & ASCCON_PE) {
port->icount.parity++;
- SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRPE);
+ amazon_writel_masked(AMAZON_ASC_WHBCON, ASCWHBCON_CLRPE, ASCWHBCON_CLRPE);
} else if (rsr & ASCCON_FE) {
port->icount.frame++;
- SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRFE);
+ amazon_writel_masked(AMAZON_ASC_WHBCON, ASCWHBCON_CLRFE, ASCWHBCON_CLRFE);
}
if (rsr & ASCCON_OE) {
port->icount.overrun++;
- SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLROE);
+ amazon_writel_masked(AMAZON_ASC_WHBCON, ASCWHBCON_CLROE, ASCWHBCON_CLROE);
}
rsr &= port->read_status_mask;
return;
}
- while (((*AMAZON_ASC_FSTAT & ASCFSTAT_TXFFLMASK)
+ while (((amazon_readl(AMAZON_ASC_FSTAT) & ASCFSTAT_TXFFLMASK)
>> ASCFSTAT_TXFFLOFF) != AMAZONASC_TXFIFO_FULL)
{
if (port->x_char) {
- *AMAZON_ASC_TBUF = port->x_char;
+ amazon_writel(port->x_char, AMAZON_ASC_TBUF);
port->icount.tx++;
port->x_char = 0;
continue;
if (uart_circ_empty(xmit))
break;
- *AMAZON_ASC_TBUF = xmit->buf[xmit->tail];
+ amazon_writel(xmit->buf[xmit->tail], AMAZON_ASC_TBUF);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
}
static irqreturn_t amazonasc_tx_int(int irq, void *port)
{
- *(AMAZON_ASC_IRNCR1) = ASC_IRNCR_TIR;
+ amazon_writel(ASC_IRNCR_TIR, AMAZON_ASC_IRNCR1);
amazonasc_start_tx(port);
/* clear any pending interrupts */
- SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRPE);
- SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRFE);
- SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLROE);
+ amazon_writel_masked(AMAZON_ASC_WHBCON,
+ (ASCWHBCON_CLRPE | ASCWHBCON_CLRFE | ASCWHBCON_CLROE),
+ (ASCWHBCON_CLRPE | ASCWHBCON_CLRFE | ASCWHBCON_CLROE));
return IRQ_HANDLED;
}
static irqreturn_t amazonasc_er_int(int irq, void *port)
{
/* clear any pending interrupts */
- SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRPE);
- SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRFE);
- SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLROE);
+ amazon_writel_masked(AMAZON_ASC_WHBCON,
+ (ASCWHBCON_CLRPE | ASCWHBCON_CLRFE | ASCWHBCON_CLROE),
+ (ASCWHBCON_CLRPE | ASCWHBCON_CLRFE | ASCWHBCON_CLROE));
+
return IRQ_HANDLED;
}
static irqreturn_t amazonasc_rx_int(int irq, void *port)
{
- *(AMAZON_ASC_IRNCR1) = ASC_IRNCR_RIR;
+ amazon_writel(ASC_IRNCR_RIR, AMAZON_ASC_IRNCR1);
amazonasc_rx_chars((struct uart_port *) port);
return IRQ_HANDLED;
}
* 16 bytes to be transmitted before reporting that the
* transmitter is empty.
*/
- status = *AMAZON_ASC_FSTAT & ASCFSTAT_TXFFLMASK;
+ status = amazon_readl(AMAZON_ASC_FSTAT) & ASCFSTAT_TXFFLMASK;
return status ? 0 : TIOCSER_TEMT;
}
amazonasc_ports[0].uartclk = uartclk;
- /* block the IRQs */
local_irq_save(flags);
/* this setup was probably already done in u-boot */
* P1.3 (RX) in, Alternate 10
* P1.4 (TX) in, Alternate 10
*/
- SET_BITFIELD((AMAZON_GPIO_P1_DIR), 0x8, 4, 1); //P1.4 output, P1.3 input
- SET_BIT((AMAZON_GPIO_P1_ALTSEL0), 0x18); //ALTSETL0 11
- CLEAR_BIT((AMAZON_GPIO_P1_ALTSEL1), 0x18); //ALTSETL1 00
- SET_BITFIELD((AMAZON_GPIO_P1_OD), 0x8, 4, 1);
+ amazon_writel_masked(AMAZON_GPIO_P1_DIR, 0x18, 0x10); //P1.4 output, P1.3 input
+ amazon_writel_masked(AMAZON_GPIO_P1_ALTSEL0, 0x18, 0x18); //ALTSETL0 11
+ amazon_writel_masked(AMAZON_GPIO_P1_ALTSEL1, 0x18, 0); //ALTSETL1 00
+ amazon_writel_masked(AMAZON_GPIO_P1_OD, 0x18, 0x10);
/* set up the CLC */
- CLEAR_BIT(AMAZON_ASC_CLC, AMAZON_ASC_CLC_DISS);
- SET_BITFIELD(AMAZON_ASC_CLC, ASCCLC_RMCMASK, ASCCLC_RMCOFFSET, 1);
+ amazon_writel_masked(AMAZON_ASC_CLC, AMAZON_ASC_CLC_DISS, 0);
+ amazon_writel_masked(AMAZON_ASC_CLC, ASCCLC_RMCMASK, 1 << ASCCLC_RMCOFFSET);
+
/* asynchronous mode */
- con = ASCCON_M_8ASYNC;
- /* set error signals - framing and overrun */
- con |= ASCCON_FEN;
- con |= ASCCON_OEN;
- con |= ASCCON_PEN;
+ con = ASCCON_M_8ASYNC | ASCCON_FEN | ASCCON_OEN | ASCCON_PEN;
+
/* choose the line - there's only one */
- *AMAZON_ASC_PISEL = 0;
-#if 1
- *AMAZON_ASC_TXFCON = (((AMAZONASC_TXFIFO_FL<<ASCTXFCON_TXFITLOFF)&ASCTXFCON_TXFITLMASK) | ASCTXFCON_TXFEN |ASCTXFCON_TXFFLU);
- *AMAZON_ASC_RXFCON = (((AMAZONASC_RXFIFO_FL<<ASCRXFCON_RXFITLOFF)&ASCRXFCON_RXFITLMASK) | ASCRXFCON_RXFEN |ASCRXFCON_RXFFLU);
+ amazon_writel(0, AMAZON_ASC_PISEL);
+ amazon_writel(((AMAZONASC_TXFIFO_FL << ASCTXFCON_TXFITLOFF) & ASCTXFCON_TXFITLMASK) | ASCTXFCON_TXFEN | ASCTXFCON_TXFFLU,
+ AMAZON_ASC_TXFCON);
+ amazon_writel(((AMAZONASC_RXFIFO_FL << ASCRXFCON_RXFITLOFF) & ASCRXFCON_RXFITLMASK) | ASCRXFCON_RXFEN | ASCRXFCON_RXFFLU,
+ AMAZON_ASC_RXFCON);
wmb();
-#else
- /* TXFIFO's fill level */
- SET_BITFIELD(AMAZON_ASC_TXFCON, ASCTXFCON_TXFITLMASK,
- ASCTXFCON_TXFITLOFF, AMAZONASC_TXFIFO_FL);
- /* enable TXFIFO */
- SET_BIT(AMAZON_ASC_TXFCON, ASCTXFCON_TXFEN);
- /* RXFIFO's fill level */
- SET_BITFIELD(AMAZON_ASC_RXFCON, ASCRXFCON_RXFITLMASK,
- ASCRXFCON_RXFITLOFF, AMAZONASC_RXFIFO_FL);
- /* enable RXFIFO */
- SET_BIT(AMAZON_ASC_RXFCON, ASCRXFCON_RXFEN);
- /* now really set CON */
-#endif
- SET_BIT(AMAZON_ASC_CON,con);
+
+ amazon_writel_masked(AMAZON_ASC_CON, con, con);
- /*
- * Allocate the IRQs
- */
retval = request_irq(AMAZONASC_RIR, amazonasc_rx_int, 0, "asc_rx", port);
if (retval){
- printk("-------req1 failed\n");
+ printk("failed to request amazonasc_rx_int\n");
return retval;
}
retval = request_irq(AMAZONASC_TIR, amazonasc_tx_int, 0, "asc_tx", port);
if (retval){
- printk("----------req2 failed\n");
+ printk("failed to request amazonasc_tx_int\n");
goto err1;
}
retval = request_irq(AMAZONASC_EIR, amazonasc_er_int, 0, "asc_er", port);
if (retval){
- printk("---------req3 failed\n");
+ printk("failed to request amazonasc_er_int\n");
goto err2;
}
- /* unblock the IRQs */
+
local_irq_restore(flags);
return 0;
static void amazonasc_shutdown(struct uart_port *port)
{
- /*
- * Free the interrupts
- */
free_irq(AMAZONASC_RIR, port);
free_irq(AMAZONASC_TIR, port);
free_irq(AMAZONASC_EIR, port);
/*
* disable the baudrate generator to disable the ASC
*/
- *AMAZON_ASC_CON = 0;
+ amazon_writel(0, AMAZON_ASC_CON);
/* flush and then disable the fifos */
- SET_BIT(AMAZON_ASC_RXFCON, ASCRXFCON_RXFFLU);
- CLEAR_BIT(AMAZON_ASC_RXFCON, ASCRXFCON_RXFEN);
- SET_BIT(AMAZON_ASC_TXFCON, ASCTXFCON_TXFFLU);
- CLEAR_BIT(AMAZON_ASC_TXFCON, ASCTXFCON_TXFEN);
+ amazon_writel_masked(AMAZON_ASC_RXFCON, ASCRXFCON_RXFFLU, ASCRXFCON_RXFFLU);
+ amazon_writel_masked(AMAZON_ASC_RXFCON, ASCRXFCON_RXFEN, 0);
+ amazon_writel_masked(AMAZON_ASC_TXFCON, ASCTXFCON_TXFFLU, ASCTXFCON_TXFFLU);
+ amazon_writel_masked(AMAZON_ASC_TXFCON, ASCTXFCON_TXFEN, 0);
}
static void amazonasc_set_termios(struct uart_port *port, struct ktermios *new, struct ktermios *old)
port->read_status_mask = ASCCON_OE;
if (iflag & INPCK)
port->read_status_mask |= ASCCON_FE | ASCCON_PE;
- /* the ASC can't really detect or generate a BREAK */
-#if 0
- if (iflag & (BRKINT | PARMRK))
- port->read_status_mask |= UERSTAT_BREAK;
-#endif
- /*
- * Characters to ignore
- */
+
port->ignore_status_mask = 0;
if (iflag & IGNPAR)
port->ignore_status_mask |= ASCCON_FE | ASCCON_PE;
-#if 0
- /* always ignore breaks - the ASC can't handle them XXXX */
- port->ignore_status_mask |= UERSTAT_BREAK;
-#endif
+
if (iflag & IGNBRK) {
- /*port->ignore_status_mask |= UERSTAT_BREAK;*/
/*
* If we're ignoring parity and break indicators,
* ignore overruns too (for real raw support).
local_irq_save(flags);
/* set up CON */
- *AMAZON_ASC_CON = con;
+ amazon_writel(con, AMAZON_ASC_CON);
/* Set baud rate - take a divider of 2 into account */
baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16);
/* the next 3 probably already happened when we set CON above */
/* disable the baudrate generator */
- CLEAR_BIT(AMAZON_ASC_CON, ASCCON_R);
+ amazon_writel_masked(AMAZON_ASC_CON, ASCCON_R, 0);
/* make sure the fractional divider is off */
- CLEAR_BIT(AMAZON_ASC_CON, ASCCON_FDE);
+ amazon_writel_masked(AMAZON_ASC_CON, ASCCON_FDE, 0);
/* set up to use divisor of 2 */
- CLEAR_BIT(AMAZON_ASC_CON, ASCCON_BRS);
+ amazon_writel_masked(AMAZON_ASC_CON, ASCCON_BRS, 0);
/* now we can write the new baudrate into the register */
- *AMAZON_ASC_BTR = quot;
+ amazon_writel(quot, AMAZON_ASC_BTR);
/* turn the baudrate generator back on */
- SET_BIT(AMAZON_ASC_CON, ASCCON_R);
+ amazon_writel_masked(AMAZON_ASC_CON, ASCCON_R, ASCCON_R);
- /* unblock the IRQs */
local_irq_restore(flags);
}
}
static struct uart_ops amazonasc_pops = {
- .tx_empty = amazonasc_tx_empty,
+ .tx_empty = amazonasc_tx_empty,
.set_mctrl = amazonasc_set_mctrl,
.get_mctrl = amazonasc_get_mctrl,
- .stop_tx = amazonasc_stop_tx,
- .start_tx = amazonasc_start_tx,
- .stop_rx = amazonasc_stop_rx,
+ .stop_tx = amazonasc_stop_tx,
+ .start_tx = amazonasc_start_tx,
+ .stop_rx = amazonasc_stop_rx,
.enable_ms = amazonasc_enable_ms,
.break_ctl = amazonasc_break_ctl,
- .startup = amazonasc_startup,
- .shutdown = amazonasc_shutdown,
+ .startup = amazonasc_startup,
+ .shutdown = amazonasc_shutdown,
.set_termios = amazonasc_set_termios,
- .type = amazonasc_type,
+ .type = amazonasc_type,
.release_port = amazonasc_release_port,
.request_port = amazonasc_request_port,
.config_port = amazonasc_config_port,
},
};
-
-
static void amazonasc_console_write(struct console *co, const char *s, u_int count)
{
int i, fifocnt;
unsigned long flags;
- /* block the IRQ */
local_irq_save(flags);
- /*
- * Now, do each character
- */
for (i = 0; i < count;)
{
/* wait until the FIFO is not full */
do
{
- fifocnt = (*AMAZON_ASC_FSTAT & ASCFSTAT_TXFFLMASK)
+ fifocnt = (amazon_readl(AMAZON_ASC_FSTAT) & ASCFSTAT_TXFFLMASK)
>> ASCFSTAT_TXFFLOFF;
} while (fifocnt == AMAZONASC_TXFIFO_FULL);
-#if 1
if (s[i] == '\0')
{
break;
}
-#endif
if (s[i] == '\n')
{
- *AMAZON_ASC_TBUF = '\r';
+ amazon_writel('\r', AMAZON_ASC_TBUF);
do
{
- fifocnt = (*AMAZON_ASC_FSTAT &
+ fifocnt = (amazon_readl(AMAZON_ASC_FSTAT) &
ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF;
} while (fifocnt == AMAZONASC_TXFIFO_FULL);
}
- *AMAZON_ASC_TBUF = s[i];
+ amazon_writel(s[i], AMAZON_ASC_TBUF);
i++;
- } /* for */
+ }
- /* restore the IRQ */
local_irq_restore(flags);
}
{
u_int lcr_h;
- lcr_h = *AMAZON_ASC_CON;
+ lcr_h = amazon_readl(AMAZON_ASC_CON);
/* do this only if the ASC is turned on */
if (lcr_h & ASCCON_R) {
u_int quot, div, fdiv, frac;
else
*bits = 8;
- quot = *AMAZON_ASC_BTR + 1;
+ quot = amazon_readl(AMAZON_ASC_BTR) + 1;
/* this gets hairy if the fractional divider is used */
if (lcr_h & ASCCON_FDE)
{
div = 1;
- fdiv = *AMAZON_ASC_FDV;
+ fdiv = amazon_readl(AMAZON_ASC_FDV);
if (fdiv == 0)
fdiv = 512;
frac = 512;
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