/*
- * linux/drivers/char/at91_serial.c
+ * linux/drivers/char/atmel_serial.c
*
- * Driver for Atmel AT91RM9200 Serial ports
+ * Driver for Atmel AT91 / AT32 Serial ports
* Copyright (C) 2003 Rick Bronson
*
* Based on drivers/char/serial_sa1100.c, by Deep Blue Solutions Ltd.
#include <asm/io.h>
-#include <asm/arch/at91rm9200_pdc.h>
#include <asm/mach/serial_at91.h>
#include <asm/arch/board.h>
-#include <asm/arch/system.h>
+#include <asm/arch/at91_pdc.h>
+#ifdef CONFIG_ARM
+#include <asm/arch/cpu.h>
#include <asm/arch/gpio.h>
+#endif
#include "atmel_serial.h"
/* Use device name ttyAT, major 204 and minor 154-169. This is necessary if we
* should coexist with the 8250 driver, such as if we have an external 16C550
* UART. */
-#define SERIAL_AT91_MAJOR 204
+#define SERIAL_ATMEL_MAJOR 204
#define MINOR_START 154
-#define AT91_DEVICENAME "ttyAT"
+#define ATMEL_DEVICENAME "ttyAT"
#else
/* Use device name ttyS, major 4, minor 64-68. This is the usual serial port
* name, but it is legally reserved for the 8250 driver. */
-#define SERIAL_AT91_MAJOR TTY_MAJOR
+#define SERIAL_ATMEL_MAJOR TTY_MAJOR
#define MINOR_START 64
-#define AT91_DEVICENAME "ttyS"
+#define ATMEL_DEVICENAME "ttyS"
#endif
-#define AT91_ISR_PASS_LIMIT 256
+#define ATMEL_ISR_PASS_LIMIT 256
-#define UART_PUT_CR(port,v) writel(v, (port)->membase + AT91_US_CR)
-#define UART_GET_MR(port) readl((port)->membase + AT91_US_MR)
-#define UART_PUT_MR(port,v) writel(v, (port)->membase + AT91_US_MR)
-#define UART_PUT_IER(port,v) writel(v, (port)->membase + AT91_US_IER)
-#define UART_PUT_IDR(port,v) writel(v, (port)->membase + AT91_US_IDR)
-#define UART_GET_IMR(port) readl((port)->membase + AT91_US_IMR)
-#define UART_GET_CSR(port) readl((port)->membase + AT91_US_CSR)
-#define UART_GET_CHAR(port) readl((port)->membase + AT91_US_RHR)
-#define UART_PUT_CHAR(port,v) writel(v, (port)->membase + AT91_US_THR)
-#define UART_GET_BRGR(port) readl((port)->membase + AT91_US_BRGR)
-#define UART_PUT_BRGR(port,v) writel(v, (port)->membase + AT91_US_BRGR)
-#define UART_PUT_RTOR(port,v) writel(v, (port)->membase + AT91_US_RTOR)
+#define UART_PUT_CR(port,v) writel(v, (port)->membase + ATMEL_US_CR)
+#define UART_GET_MR(port) readl((port)->membase + ATMEL_US_MR)
+#define UART_PUT_MR(port,v) writel(v, (port)->membase + ATMEL_US_MR)
+#define UART_PUT_IER(port,v) writel(v, (port)->membase + ATMEL_US_IER)
+#define UART_PUT_IDR(port,v) writel(v, (port)->membase + ATMEL_US_IDR)
+#define UART_GET_IMR(port) readl((port)->membase + ATMEL_US_IMR)
+#define UART_GET_CSR(port) readl((port)->membase + ATMEL_US_CSR)
+#define UART_GET_CHAR(port) readl((port)->membase + ATMEL_US_RHR)
+#define UART_PUT_CHAR(port,v) writel(v, (port)->membase + ATMEL_US_THR)
+#define UART_GET_BRGR(port) readl((port)->membase + ATMEL_US_BRGR)
+#define UART_PUT_BRGR(port,v) writel(v, (port)->membase + ATMEL_US_BRGR)
+#define UART_PUT_RTOR(port,v) writel(v, (port)->membase + ATMEL_US_RTOR)
-// #define UART_GET_CR(port) readl((port)->membase + AT91_US_CR) // is write-only
+// #define UART_GET_CR(port) readl((port)->membase + ATMEL_US_CR) // is write-only
/* PDC registers */
-#define UART_PUT_PTCR(port,v) writel(v, (port)->membase + AT91_PDC_PTCR)
-#define UART_GET_PTSR(port) readl((port)->membase + AT91_PDC_PTSR)
+#define UART_PUT_PTCR(port,v) writel(v, (port)->membase + ATMEL_PDC_PTCR)
+#define UART_GET_PTSR(port) readl((port)->membase + ATMEL_PDC_PTSR)
-#define UART_PUT_RPR(port,v) writel(v, (port)->membase + AT91_PDC_RPR)
-#define UART_GET_RPR(port) readl((port)->membase + AT91_PDC_RPR)
-#define UART_PUT_RCR(port,v) writel(v, (port)->membase + AT91_PDC_RCR)
-#define UART_PUT_RNPR(port,v) writel(v, (port)->membase + AT91_PDC_RNPR)
-#define UART_PUT_RNCR(port,v) writel(v, (port)->membase + AT91_PDC_RNCR)
+#define UART_PUT_RPR(port,v) writel(v, (port)->membase + ATMEL_PDC_RPR)
+#define UART_GET_RPR(port) readl((port)->membase + ATMEL_PDC_RPR)
+#define UART_PUT_RCR(port,v) writel(v, (port)->membase + ATMEL_PDC_RCR)
+#define UART_PUT_RNPR(port,v) writel(v, (port)->membase + ATMEL_PDC_RNPR)
+#define UART_PUT_RNCR(port,v) writel(v, (port)->membase + ATMEL_PDC_RNCR)
-#define UART_PUT_TPR(port,v) writel(v, (port)->membase + AT91_PDC_TPR)
-#define UART_PUT_TCR(port,v) writel(v, (port)->membase + AT91_PDC_TCR)
-//#define UART_PUT_TNPR(port,v) writel(v, (port)->membase + AT91_PDC_TNPR)
-//#define UART_PUT_TNCR(port,v) writel(v, (port)->membase + AT91_PDC_TNCR)
+#define UART_PUT_TPR(port,v) writel(v, (port)->membase + ATMEL_PDC_TPR)
+#define UART_PUT_TCR(port,v) writel(v, (port)->membase + ATMEL_PDC_TCR)
+//#define UART_PUT_TNPR(port,v) writel(v, (port)->membase + ATMEL_PDC_TNPR)
+//#define UART_PUT_TNCR(port,v) writel(v, (port)->membase + ATMEL_PDC_TNCR)
-static int (*at91_open)(struct uart_port *);
-static void (*at91_close)(struct uart_port *);
+static int (*atmel_open_hook)(struct uart_port *);
+static void (*atmel_close_hook)(struct uart_port *);
/*
* We wrap our port structure around the generic uart_port.
*/
-struct at91_uart_port {
+struct atmel_uart_port {
struct uart_port uart; /* uart */
struct clk *clk; /* uart clock */
unsigned short suspended; /* is port suspended? */
};
-static struct at91_uart_port at91_ports[AT91_NR_UART];
+static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];
#ifdef SUPPORT_SYSRQ
-static struct console at91_console;
+static struct console atmel_console;
#endif
/*
* Return TIOCSER_TEMT when transmitter FIFO and Shift register is empty.
*/
-static u_int at91_tx_empty(struct uart_port *port)
+static u_int atmel_tx_empty(struct uart_port *port)
{
- return (UART_GET_CSR(port) & AT91_US_TXEMPTY) ? TIOCSER_TEMT : 0;
+ return (UART_GET_CSR(port) & ATMEL_US_TXEMPTY) ? TIOCSER_TEMT : 0;
}
/*
* Set state of the modem control output lines
*/
-static void at91_set_mctrl(struct uart_port *port, u_int mctrl)
+static void atmel_set_mctrl(struct uart_port *port, u_int mctrl)
{
unsigned int control = 0;
unsigned int mode;
- if (arch_identify() == ARCH_ID_AT91RM9200) {
+#ifdef CONFIG_ARCH_AT91RM9200
+ if (cpu_is_at91rm9200()) {
/*
* AT91RM9200 Errata #39: RTS0 is not internally connected to PA21.
* We need to drive the pin manually.
at91_set_gpio_value(AT91_PIN_PA21, 1);
}
}
+#endif
if (mctrl & TIOCM_RTS)
- control |= AT91_US_RTSEN;
+ control |= ATMEL_US_RTSEN;
else
- control |= AT91_US_RTSDIS;
+ control |= ATMEL_US_RTSDIS;
if (mctrl & TIOCM_DTR)
- control |= AT91_US_DTREN;
+ control |= ATMEL_US_DTREN;
else
- control |= AT91_US_DTRDIS;
+ control |= ATMEL_US_DTRDIS;
UART_PUT_CR(port, control);
/* Local loopback mode? */
- mode = UART_GET_MR(port) & ~AT91_US_CHMODE;
+ mode = UART_GET_MR(port) & ~ATMEL_US_CHMODE;
if (mctrl & TIOCM_LOOP)
- mode |= AT91_US_CHMODE_LOC_LOOP;
+ mode |= ATMEL_US_CHMODE_LOC_LOOP;
else
- mode |= AT91_US_CHMODE_NORMAL;
+ mode |= ATMEL_US_CHMODE_NORMAL;
UART_PUT_MR(port, mode);
}
/*
* Get state of the modem control input lines
*/
-static u_int at91_get_mctrl(struct uart_port *port)
+static u_int atmel_get_mctrl(struct uart_port *port)
{
unsigned int status, ret = 0;
/*
* The control signals are active low.
*/
- if (!(status & AT91_US_DCD))
+ if (!(status & ATMEL_US_DCD))
ret |= TIOCM_CD;
- if (!(status & AT91_US_CTS))
+ if (!(status & ATMEL_US_CTS))
ret |= TIOCM_CTS;
- if (!(status & AT91_US_DSR))
+ if (!(status & ATMEL_US_DSR))
ret |= TIOCM_DSR;
- if (!(status & AT91_US_RI))
+ if (!(status & ATMEL_US_RI))
ret |= TIOCM_RI;
return ret;
/*
* Stop transmitting.
*/
-static void at91_stop_tx(struct uart_port *port)
+static void atmel_stop_tx(struct uart_port *port)
{
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
- UART_PUT_IDR(port, AT91_US_TXRDY);
+ UART_PUT_IDR(port, ATMEL_US_TXRDY);
}
/*
* Start transmitting.
*/
-static void at91_start_tx(struct uart_port *port)
+static void atmel_start_tx(struct uart_port *port)
{
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
- UART_PUT_IER(port, AT91_US_TXRDY);
+ UART_PUT_IER(port, ATMEL_US_TXRDY);
}
/*
* Stop receiving - port is in process of being closed.
*/
-static void at91_stop_rx(struct uart_port *port)
+static void atmel_stop_rx(struct uart_port *port)
{
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
- UART_PUT_IDR(port, AT91_US_RXRDY);
+ UART_PUT_IDR(port, ATMEL_US_RXRDY);
}
/*
* Enable modem status interrupts
*/
-static void at91_enable_ms(struct uart_port *port)
+static void atmel_enable_ms(struct uart_port *port)
{
- UART_PUT_IER(port, AT91_US_RIIC | AT91_US_DSRIC | AT91_US_DCDIC | AT91_US_CTSIC);
+ UART_PUT_IER(port, ATMEL_US_RIIC | ATMEL_US_DSRIC | ATMEL_US_DCDIC | ATMEL_US_CTSIC);
}
/*
* Control the transmission of a break signal
*/
-static void at91_break_ctl(struct uart_port *port, int break_state)
+static void atmel_break_ctl(struct uart_port *port, int break_state)
{
if (break_state != 0)
- UART_PUT_CR(port, AT91_US_STTBRK); /* start break */
+ UART_PUT_CR(port, ATMEL_US_STTBRK); /* start break */
else
- UART_PUT_CR(port, AT91_US_STPBRK); /* stop break */
+ UART_PUT_CR(port, ATMEL_US_STPBRK); /* stop break */
}
/*
* Characters received (called from interrupt handler)
*/
-static void at91_rx_chars(struct uart_port *port, struct pt_regs *regs)
+static void atmel_rx_chars(struct uart_port *port)
{
struct tty_struct *tty = port->info->tty;
unsigned int status, ch, flg;
status = UART_GET_CSR(port);
- while (status & AT91_US_RXRDY) {
+ while (status & ATMEL_US_RXRDY) {
ch = UART_GET_CHAR(port);
port->icount.rx++;
* note that the error handling code is
* out of the main execution path
*/
- if (unlikely(status & (AT91_US_PARE | AT91_US_FRAME | AT91_US_OVRE | AT91_US_RXBRK))) {
- UART_PUT_CR(port, AT91_US_RSTSTA); /* clear error */
- if (status & AT91_US_RXBRK) {
- status &= ~(AT91_US_PARE | AT91_US_FRAME); /* ignore side-effect */
+ if (unlikely(status & (ATMEL_US_PARE | ATMEL_US_FRAME | ATMEL_US_OVRE | ATMEL_US_RXBRK))) {
+ UART_PUT_CR(port, ATMEL_US_RSTSTA); /* clear error */
+ if (status & ATMEL_US_RXBRK) {
+ status &= ~(ATMEL_US_PARE | ATMEL_US_FRAME); /* ignore side-effect */
port->icount.brk++;
if (uart_handle_break(port))
goto ignore_char;
}
- if (status & AT91_US_PARE)
+ if (status & ATMEL_US_PARE)
port->icount.parity++;
- if (status & AT91_US_FRAME)
+ if (status & ATMEL_US_FRAME)
port->icount.frame++;
- if (status & AT91_US_OVRE)
+ if (status & ATMEL_US_OVRE)
port->icount.overrun++;
status &= port->read_status_mask;
- if (status & AT91_US_RXBRK)
+ if (status & ATMEL_US_RXBRK)
flg = TTY_BREAK;
- else if (status & AT91_US_PARE)
+ else if (status & ATMEL_US_PARE)
flg = TTY_PARITY;
- else if (status & AT91_US_FRAME)
+ else if (status & ATMEL_US_FRAME)
flg = TTY_FRAME;
}
- if (uart_handle_sysrq_char(port, ch, regs))
+ if (uart_handle_sysrq_char(port, ch))
goto ignore_char;
- uart_insert_char(port, status, AT91_US_OVRE, ch, flg);
+ uart_insert_char(port, status, ATMEL_US_OVRE, ch, flg);
ignore_char:
status = UART_GET_CSR(port);
/*
* Transmit characters (called from interrupt handler)
*/
-static void at91_tx_chars(struct uart_port *port)
+static void atmel_tx_chars(struct uart_port *port)
{
struct circ_buf *xmit = &port->info->xmit;
return;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
- at91_stop_tx(port);
+ atmel_stop_tx(port);
return;
}
- while (UART_GET_CSR(port) & AT91_US_TXRDY) {
+ while (UART_GET_CSR(port) & ATMEL_US_TXRDY) {
UART_PUT_CHAR(port, xmit->buf[xmit->tail]);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
uart_write_wakeup(port);
if (uart_circ_empty(xmit))
- at91_stop_tx(port);
+ atmel_stop_tx(port);
}
/*
* Interrupt handler
*/
-static irqreturn_t at91_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t atmel_interrupt(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
unsigned int status, pending, pass_counter = 0;
status = UART_GET_CSR(port);
pending = status & UART_GET_IMR(port);
while (pending) {
/* Interrupt receive */
- if (pending & AT91_US_RXRDY)
- at91_rx_chars(port, regs);
+ if (pending & ATMEL_US_RXRDY)
+ atmel_rx_chars(port);
// TODO: All reads to CSR will clear these interrupts!
- if (pending & AT91_US_RIIC) port->icount.rng++;
- if (pending & AT91_US_DSRIC) port->icount.dsr++;
- if (pending & AT91_US_DCDIC)
- uart_handle_dcd_change(port, !(status & AT91_US_DCD));
- if (pending & AT91_US_CTSIC)
- uart_handle_cts_change(port, !(status & AT91_US_CTS));
- if (pending & (AT91_US_RIIC | AT91_US_DSRIC | AT91_US_DCDIC | AT91_US_CTSIC))
+ if (pending & ATMEL_US_RIIC) port->icount.rng++;
+ if (pending & ATMEL_US_DSRIC) port->icount.dsr++;
+ if (pending & ATMEL_US_DCDIC)
+ uart_handle_dcd_change(port, !(status & ATMEL_US_DCD));
+ if (pending & ATMEL_US_CTSIC)
+ uart_handle_cts_change(port, !(status & ATMEL_US_CTS));
+ if (pending & (ATMEL_US_RIIC | ATMEL_US_DSRIC | ATMEL_US_DCDIC | ATMEL_US_CTSIC))
wake_up_interruptible(&port->info->delta_msr_wait);
/* Interrupt transmit */
- if (pending & AT91_US_TXRDY)
- at91_tx_chars(port);
+ if (pending & ATMEL_US_TXRDY)
+ atmel_tx_chars(port);
- if (pass_counter++ > AT91_ISR_PASS_LIMIT)
+ if (pass_counter++ > ATMEL_ISR_PASS_LIMIT)
break;
status = UART_GET_CSR(port);
/*
* Perform initialization and enable port for reception
*/
-static int at91_startup(struct uart_port *port)
+static int atmel_startup(struct uart_port *port)
{
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
int retval;
/*
/*
* Allocate the IRQ
*/
- retval = request_irq(port->irq, at91_interrupt, IRQF_SHARED, "at91_serial", port);
+ retval = request_irq(port->irq, atmel_interrupt, IRQF_SHARED, "atmel_serial", port);
if (retval) {
- printk("at91_serial: at91_startup - Can't get irq\n");
+ printk("atmel_serial: atmel_startup - Can't get irq\n");
return retval;
}
* If there is a specific "open" function (to register
* control line interrupts)
*/
- if (at91_open) {
- retval = at91_open(port);
+ if (atmel_open_hook) {
+ retval = atmel_open_hook(port);
if (retval) {
free_irq(port->irq, port);
return retval;
/*
* Finally, enable the serial port
*/
- UART_PUT_CR(port, AT91_US_RSTSTA | AT91_US_RSTRX);
- UART_PUT_CR(port, AT91_US_TXEN | AT91_US_RXEN); /* enable xmit & rcvr */
+ UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
+ UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN); /* enable xmit & rcvr */
- UART_PUT_IER(port, AT91_US_RXRDY); /* enable receive only */
+ UART_PUT_IER(port, ATMEL_US_RXRDY); /* enable receive only */
return 0;
}
/*
* Disable the port
*/
-static void at91_shutdown(struct uart_port *port)
+static void atmel_shutdown(struct uart_port *port)
{
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
/*
* Disable all interrupts, port and break condition.
*/
- UART_PUT_CR(port, AT91_US_RSTSTA);
+ UART_PUT_CR(port, ATMEL_US_RSTSTA);
UART_PUT_IDR(port, -1);
/*
* If there is a specific "close" function (to unregister
* control line interrupts)
*/
- if (at91_close)
- at91_close(port);
+ if (atmel_close_hook)
+ atmel_close_hook(port);
}
/*
* Power / Clock management.
*/
-static void at91_serial_pm(struct uart_port *port, unsigned int state, unsigned int oldstate)
+static void atmel_serial_pm(struct uart_port *port, unsigned int state, unsigned int oldstate)
{
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
switch (state) {
case 0:
* Enable the peripheral clock for this serial port.
* This is called on uart_open() or a resume event.
*/
- clk_enable(at91_port->clk);
+ clk_enable(atmel_port->clk);
break;
case 3:
/*
* Disable the peripheral clock for this serial port.
* This is called on uart_close() or a suspend event.
*/
- clk_disable(at91_port->clk);
+ clk_disable(atmel_port->clk);
break;
default:
- printk(KERN_ERR "at91_serial: unknown pm %d\n", state);
+ printk(KERN_ERR "atmel_serial: unknown pm %d\n", state);
}
}
/*
* Change the port parameters
*/
-static void at91_set_termios(struct uart_port *port, struct termios * termios, struct termios * old)
+static void atmel_set_termios(struct uart_port *port, struct ktermios * termios, struct ktermios * old)
{
unsigned long flags;
unsigned int mode, imr, quot, baud;
quot = uart_get_divisor(port, baud);
/* Get current mode register */
- mode = UART_GET_MR(port) & ~(AT91_US_CHRL | AT91_US_NBSTOP | AT91_US_PAR);
+ mode = UART_GET_MR(port) & ~(ATMEL_US_CHRL | ATMEL_US_NBSTOP | ATMEL_US_PAR);
/* byte size */
switch (termios->c_cflag & CSIZE) {
case CS5:
- mode |= AT91_US_CHRL_5;
+ mode |= ATMEL_US_CHRL_5;
break;
case CS6:
- mode |= AT91_US_CHRL_6;
+ mode |= ATMEL_US_CHRL_6;
break;
case CS7:
- mode |= AT91_US_CHRL_7;
+ mode |= ATMEL_US_CHRL_7;
break;
default:
- mode |= AT91_US_CHRL_8;
+ mode |= ATMEL_US_CHRL_8;
break;
}
/* stop bits */
if (termios->c_cflag & CSTOPB)
- mode |= AT91_US_NBSTOP_2;
+ mode |= ATMEL_US_NBSTOP_2;
/* parity */
if (termios->c_cflag & PARENB) {
if (termios->c_cflag & CMSPAR) { /* Mark or Space parity */
if (termios->c_cflag & PARODD)
- mode |= AT91_US_PAR_MARK;
+ mode |= ATMEL_US_PAR_MARK;
else
- mode |= AT91_US_PAR_SPACE;
+ mode |= ATMEL_US_PAR_SPACE;
}
else if (termios->c_cflag & PARODD)
- mode |= AT91_US_PAR_ODD;
+ mode |= ATMEL_US_PAR_ODD;
else
- mode |= AT91_US_PAR_EVEN;
+ mode |= ATMEL_US_PAR_EVEN;
}
else
- mode |= AT91_US_PAR_NONE;
+ mode |= ATMEL_US_PAR_NONE;
spin_lock_irqsave(&port->lock, flags);
- port->read_status_mask = AT91_US_OVRE;
+ port->read_status_mask = ATMEL_US_OVRE;
if (termios->c_iflag & INPCK)
- port->read_status_mask |= (AT91_US_FRAME | AT91_US_PARE);
+ port->read_status_mask |= (ATMEL_US_FRAME | ATMEL_US_PARE);
if (termios->c_iflag & (BRKINT | PARMRK))
- port->read_status_mask |= AT91_US_RXBRK;
+ port->read_status_mask |= ATMEL_US_RXBRK;
/*
* Characters to ignore
*/
port->ignore_status_mask = 0;
if (termios->c_iflag & IGNPAR)
- port->ignore_status_mask |= (AT91_US_FRAME | AT91_US_PARE);
+ port->ignore_status_mask |= (ATMEL_US_FRAME | ATMEL_US_PARE);
if (termios->c_iflag & IGNBRK) {
- port->ignore_status_mask |= AT91_US_RXBRK;
+ port->ignore_status_mask |= ATMEL_US_RXBRK;
/*
* If we're ignoring parity and break indicators,
* ignore overruns too (for real raw support).
*/
if (termios->c_iflag & IGNPAR)
- port->ignore_status_mask |= AT91_US_OVRE;
+ port->ignore_status_mask |= ATMEL_US_OVRE;
}
// TODO: Ignore all characters if CREAD is set.
/* disable interrupts and drain transmitter */
imr = UART_GET_IMR(port); /* get interrupt mask */
UART_PUT_IDR(port, -1); /* disable all interrupts */
- while (!(UART_GET_CSR(port) & AT91_US_TXEMPTY)) { barrier(); }
+ while (!(UART_GET_CSR(port) & ATMEL_US_TXEMPTY)) { barrier(); }
/* disable receiver and transmitter */
- UART_PUT_CR(port, AT91_US_TXDIS | AT91_US_RXDIS);
+ UART_PUT_CR(port, ATMEL_US_TXDIS | ATMEL_US_RXDIS);
/* set the parity, stop bits and data size */
UART_PUT_MR(port, mode);
/* set the baud rate */
UART_PUT_BRGR(port, quot);
- UART_PUT_CR(port, AT91_US_RSTSTA | AT91_US_RSTRX);
- UART_PUT_CR(port, AT91_US_TXEN | AT91_US_RXEN);
+ UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
+ UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
/* restore interrupts */
UART_PUT_IER(port, imr);
/*
* Return string describing the specified port
*/
-static const char *at91_type(struct uart_port *port)
+static const char *atmel_type(struct uart_port *port)
{
- return (port->type == PORT_AT91) ? "AT91_SERIAL" : NULL;
+ return (port->type == PORT_ATMEL) ? "ATMEL_SERIAL" : NULL;
}
/*
* Release the memory region(s) being used by 'port'.
*/
-static void at91_release_port(struct uart_port *port)
+static void atmel_release_port(struct uart_port *port)
{
struct platform_device *pdev = to_platform_device(port->dev);
int size = pdev->resource[0].end - pdev->resource[0].start + 1;
/*
* Request the memory region(s) being used by 'port'.
*/
-static int at91_request_port(struct uart_port *port)
+static int atmel_request_port(struct uart_port *port)
{
struct platform_device *pdev = to_platform_device(port->dev);
int size = pdev->resource[0].end - pdev->resource[0].start + 1;
- if (!request_mem_region(port->mapbase, size, "at91_serial"))
+ if (!request_mem_region(port->mapbase, size, "atmel_serial"))
return -EBUSY;
if (port->flags & UPF_IOREMAP) {
/*
* Configure/autoconfigure the port.
*/
-static void at91_config_port(struct uart_port *port, int flags)
+static void atmel_config_port(struct uart_port *port, int flags)
{
if (flags & UART_CONFIG_TYPE) {
- port->type = PORT_AT91;
- at91_request_port(port);
+ port->type = PORT_ATMEL;
+ atmel_request_port(port);
}
}
/*
* Verify the new serial_struct (for TIOCSSERIAL).
*/
-static int at91_verify_port(struct uart_port *port, struct serial_struct *ser)
+static int atmel_verify_port(struct uart_port *port, struct serial_struct *ser)
{
int ret = 0;
- if (ser->type != PORT_UNKNOWN && ser->type != PORT_AT91)
+ if (ser->type != PORT_UNKNOWN && ser->type != PORT_ATMEL)
ret = -EINVAL;
if (port->irq != ser->irq)
ret = -EINVAL;
return ret;
}
-static struct uart_ops at91_pops = {
- .tx_empty = at91_tx_empty,
- .set_mctrl = at91_set_mctrl,
- .get_mctrl = at91_get_mctrl,
- .stop_tx = at91_stop_tx,
- .start_tx = at91_start_tx,
- .stop_rx = at91_stop_rx,
- .enable_ms = at91_enable_ms,
- .break_ctl = at91_break_ctl,
- .startup = at91_startup,
- .shutdown = at91_shutdown,
- .set_termios = at91_set_termios,
- .type = at91_type,
- .release_port = at91_release_port,
- .request_port = at91_request_port,
- .config_port = at91_config_port,
- .verify_port = at91_verify_port,
- .pm = at91_serial_pm,
+static struct uart_ops atmel_pops = {
+ .tx_empty = atmel_tx_empty,
+ .set_mctrl = atmel_set_mctrl,
+ .get_mctrl = atmel_get_mctrl,
+ .stop_tx = atmel_stop_tx,
+ .start_tx = atmel_start_tx,
+ .stop_rx = atmel_stop_rx,
+ .enable_ms = atmel_enable_ms,
+ .break_ctl = atmel_break_ctl,
+ .startup = atmel_startup,
+ .shutdown = atmel_shutdown,
+ .set_termios = atmel_set_termios,
+ .type = atmel_type,
+ .release_port = atmel_release_port,
+ .request_port = atmel_request_port,
+ .config_port = atmel_config_port,
+ .verify_port = atmel_verify_port,
+ .pm = atmel_serial_pm,
};
/*
* Configure the port from the platform device resource info.
*/
-static void __devinit at91_init_port(struct at91_uart_port *at91_port, struct platform_device *pdev)
+static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port, struct platform_device *pdev)
{
- struct uart_port *port = &at91_port->uart;
- struct at91_uart_data *data = pdev->dev.platform_data;
+ struct uart_port *port = &atmel_port->uart;
+ struct atmel_uart_data *data = pdev->dev.platform_data;
port->iotype = UPIO_MEM;
- port->flags = UPF_BOOT_AUTOCONF;
- port->ops = &at91_pops;
- port->fifosize = 1;
+ port->flags = UPF_BOOT_AUTOCONF;
+ port->ops = &atmel_pops;
+ port->fifosize = 1;
port->line = pdev->id;
port->dev = &pdev->dev;
port->mapbase = pdev->resource[0].start;
port->irq = pdev->resource[1].start;
- if (port->mapbase == AT91_VA_BASE_SYS + AT91_DBGU) /* Part of system perpherals - already mapped */
- port->membase = (void __iomem *) port->mapbase;
+ if (data->regs)
+ /* Already mapped by setup code */
+ port->membase = data->regs;
else {
port->flags |= UPF_IOREMAP;
port->membase = NULL;
}
- if (!at91_port->clk) { /* for console, the clock could already be configured */
- at91_port->clk = clk_get(&pdev->dev, "usart");
- clk_enable(at91_port->clk);
- port->uartclk = clk_get_rate(at91_port->clk);
+ if (!atmel_port->clk) { /* for console, the clock could already be configured */
+ atmel_port->clk = clk_get(&pdev->dev, "usart");
+ clk_enable(atmel_port->clk);
+ port->uartclk = clk_get_rate(atmel_port->clk);
}
}
/*
* Register board-specific modem-control line handlers.
*/
-void __init at91_register_uart_fns(struct at91_port_fns *fns)
+void __init atmel_register_uart_fns(struct atmel_port_fns *fns)
{
if (fns->enable_ms)
- at91_pops.enable_ms = fns->enable_ms;
+ atmel_pops.enable_ms = fns->enable_ms;
if (fns->get_mctrl)
- at91_pops.get_mctrl = fns->get_mctrl;
+ atmel_pops.get_mctrl = fns->get_mctrl;
if (fns->set_mctrl)
- at91_pops.set_mctrl = fns->set_mctrl;
- at91_open = fns->open;
- at91_close = fns->close;
- at91_pops.pm = fns->pm;
- at91_pops.set_wake = fns->set_wake;
+ atmel_pops.set_mctrl = fns->set_mctrl;
+ atmel_open_hook = fns->open;
+ atmel_close_hook = fns->close;
+ atmel_pops.pm = fns->pm;
+ atmel_pops.set_wake = fns->set_wake;
}
#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
-static void at91_console_putchar(struct uart_port *port, int ch)
+static void atmel_console_putchar(struct uart_port *port, int ch)
{
- while (!(UART_GET_CSR(port) & AT91_US_TXRDY))
+ while (!(UART_GET_CSR(port) & ATMEL_US_TXRDY))
barrier();
UART_PUT_CHAR(port, ch);
}
/*
* Interrupts are disabled on entering
*/
-static void at91_console_write(struct console *co, const char *s, u_int count)
+static void atmel_console_write(struct console *co, const char *s, u_int count)
{
- struct uart_port *port = &at91_ports[co->index].uart;
+ struct uart_port *port = &atmel_ports[co->index].uart;
unsigned int status, imr;
/*
* First, save IMR and then disable interrupts
*/
imr = UART_GET_IMR(port); /* get interrupt mask */
- UART_PUT_IDR(port, AT91_US_RXRDY | AT91_US_TXRDY);
+ UART_PUT_IDR(port, ATMEL_US_RXRDY | ATMEL_US_TXRDY);
- uart_console_write(port, s, count, at91_console_putchar);
+ uart_console_write(port, s, count, atmel_console_putchar);
/*
* Finally, wait for transmitter to become empty
*/
do {
status = UART_GET_CSR(port);
- } while (!(status & AT91_US_TXRDY));
+ } while (!(status & ATMEL_US_TXRDY));
UART_PUT_IER(port, imr); /* set interrupts back the way they were */
}
* If the port was already initialised (eg, by a boot loader), try to determine
* the current setup.
*/
-static void __init at91_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits)
+static void __init atmel_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits)
{
unsigned int mr, quot;
// TODO: CR is a write-only register
// unsigned int cr;
//
-// cr = UART_GET_CR(port) & (AT91_US_RXEN | AT91_US_TXEN);
-// if (cr == (AT91_US_RXEN | AT91_US_TXEN)) {
+// cr = UART_GET_CR(port) & (ATMEL_US_RXEN | ATMEL_US_TXEN);
+// if (cr == (ATMEL_US_RXEN | ATMEL_US_TXEN)) {
// /* ok, the port was enabled */
// }
- mr = UART_GET_MR(port) & AT91_US_CHRL;
- if (mr == AT91_US_CHRL_8)
+ mr = UART_GET_MR(port) & ATMEL_US_CHRL;
+ if (mr == ATMEL_US_CHRL_8)
*bits = 8;
else
*bits = 7;
- mr = UART_GET_MR(port) & AT91_US_PAR;
- if (mr == AT91_US_PAR_EVEN)
+ mr = UART_GET_MR(port) & ATMEL_US_PAR;
+ if (mr == ATMEL_US_PAR_EVEN)
*parity = 'e';
- else if (mr == AT91_US_PAR_ODD)
+ else if (mr == ATMEL_US_PAR_ODD)
*parity = 'o';
+ /*
+ * The serial core only rounds down when matching this to a
+ * supported baud rate. Make sure we don't end up slightly
+ * lower than one of those, as it would make us fall through
+ * to a much lower baud rate than we really want.
+ */
quot = UART_GET_BRGR(port);
- *baud = port->uartclk / (16 * (quot));
+ *baud = port->uartclk / (16 * (quot - 1));
}
-static int __init at91_console_setup(struct console *co, char *options)
+static int __init atmel_console_setup(struct console *co, char *options)
{
- struct uart_port *port = &at91_ports[co->index].uart;
+ struct uart_port *port = &atmel_ports[co->index].uart;
int baud = 115200;
int bits = 8;
int parity = 'n';
return -ENODEV;
UART_PUT_IDR(port, -1); /* disable interrupts */
- UART_PUT_CR(port, AT91_US_RSTSTA | AT91_US_RSTRX);
- UART_PUT_CR(port, AT91_US_TXEN | AT91_US_RXEN);
+ UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
+ UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
else
- at91_console_get_options(port, &baud, &parity, &bits);
+ atmel_console_get_options(port, &baud, &parity, &bits);
return uart_set_options(port, co, baud, parity, bits, flow);
}
-static struct uart_driver at91_uart;
+static struct uart_driver atmel_uart;
-static struct console at91_console = {
- .name = AT91_DEVICENAME,
- .write = at91_console_write,
+static struct console atmel_console = {
+ .name = ATMEL_DEVICENAME,
+ .write = atmel_console_write,
.device = uart_console_device,
- .setup = at91_console_setup,
+ .setup = atmel_console_setup,
.flags = CON_PRINTBUFFER,
.index = -1,
- .data = &at91_uart,
+ .data = &atmel_uart,
};
-#define AT91_CONSOLE_DEVICE &at91_console
+#define ATMEL_CONSOLE_DEVICE &atmel_console
/*
* Early console initialization (before VM subsystem initialized).
*/
-static int __init at91_console_init(void)
+static int __init atmel_console_init(void)
{
- if (at91_default_console_device) {
- add_preferred_console(AT91_DEVICENAME, at91_default_console_device->id, NULL);
- at91_init_port(&(at91_ports[at91_default_console_device->id]), at91_default_console_device);
- register_console(&at91_console);
+ if (atmel_default_console_device) {
+ add_preferred_console(ATMEL_DEVICENAME, atmel_default_console_device->id, NULL);
+ atmel_init_port(&(atmel_ports[atmel_default_console_device->id]), atmel_default_console_device);
+ register_console(&atmel_console);
}
return 0;
}
-console_initcall(at91_console_init);
+console_initcall(atmel_console_init);
/*
* Late console initialization.
*/
-static int __init at91_late_console_init(void)
+static int __init atmel_late_console_init(void)
{
- if (at91_default_console_device && !(at91_console.flags & CON_ENABLED))
- register_console(&at91_console);
+ if (atmel_default_console_device && !(atmel_console.flags & CON_ENABLED))
+ register_console(&atmel_console);
return 0;
}
-core_initcall(at91_late_console_init);
+core_initcall(atmel_late_console_init);
#else
-#define AT91_CONSOLE_DEVICE NULL
+#define ATMEL_CONSOLE_DEVICE NULL
#endif
-static struct uart_driver at91_uart = {
+static struct uart_driver atmel_uart = {
.owner = THIS_MODULE,
- .driver_name = "at91_serial",
- .dev_name = AT91_DEVICENAME,
- .major = SERIAL_AT91_MAJOR,
+ .driver_name = "atmel_serial",
+ .dev_name = ATMEL_DEVICENAME,
+ .major = SERIAL_ATMEL_MAJOR,
.minor = MINOR_START,
- .nr = AT91_NR_UART,
- .cons = AT91_CONSOLE_DEVICE,
+ .nr = ATMEL_MAX_UART,
+ .cons = ATMEL_CONSOLE_DEVICE,
};
#ifdef CONFIG_PM
-static int at91_serial_suspend(struct platform_device *pdev, pm_message_t state)
+static int atmel_serial_suspend(struct platform_device *pdev, pm_message_t state)
{
struct uart_port *port = platform_get_drvdata(pdev);
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
if (device_may_wakeup(&pdev->dev) && !at91_suspend_entering_slow_clock())
enable_irq_wake(port->irq);
else {
- disable_irq_wake(port->irq);
- uart_suspend_port(&at91_uart, port);
- at91_port->suspended = 1;
+ uart_suspend_port(&atmel_uart, port);
+ atmel_port->suspended = 1;
}
return 0;
}
-static int at91_serial_resume(struct platform_device *pdev)
+static int atmel_serial_resume(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
- if (at91_port->suspended) {
- uart_resume_port(&at91_uart, port);
- at91_port->suspended = 0;
+ if (atmel_port->suspended) {
+ uart_resume_port(&atmel_uart, port);
+ atmel_port->suspended = 0;
}
+ else
+ disable_irq_wake(port->irq);
return 0;
}
#else
-#define at91_serial_suspend NULL
-#define at91_serial_resume NULL
+#define atmel_serial_suspend NULL
+#define atmel_serial_resume NULL
#endif
-static int __devinit at91_serial_probe(struct platform_device *pdev)
+static int __devinit atmel_serial_probe(struct platform_device *pdev)
{
- struct at91_uart_port *port;
+ struct atmel_uart_port *port;
int ret;
- port = &at91_ports[pdev->id];
- at91_init_port(port, pdev);
+ port = &atmel_ports[pdev->id];
+ atmel_init_port(port, pdev);
- ret = uart_add_one_port(&at91_uart, &port->uart);
+ ret = uart_add_one_port(&atmel_uart, &port->uart);
if (!ret) {
device_init_wakeup(&pdev->dev, 1);
platform_set_drvdata(pdev, port);
return ret;
}
-static int __devexit at91_serial_remove(struct platform_device *pdev)
+static int __devexit atmel_serial_remove(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
- struct at91_uart_port *at91_port = (struct at91_uart_port *) port;
+ struct atmel_uart_port *atmel_port = (struct atmel_uart_port *) port;
int ret = 0;
- clk_disable(at91_port->clk);
- clk_put(at91_port->clk);
+ clk_disable(atmel_port->clk);
+ clk_put(atmel_port->clk);
device_init_wakeup(&pdev->dev, 0);
platform_set_drvdata(pdev, NULL);
if (port) {
- ret = uart_remove_one_port(&at91_uart, port);
+ ret = uart_remove_one_port(&atmel_uart, port);
kfree(port);
}
return ret;
}
-static struct platform_driver at91_serial_driver = {
- .probe = at91_serial_probe,
- .remove = __devexit_p(at91_serial_remove),
- .suspend = at91_serial_suspend,
- .resume = at91_serial_resume,
+static struct platform_driver atmel_serial_driver = {
+ .probe = atmel_serial_probe,
+ .remove = __devexit_p(atmel_serial_remove),
+ .suspend = atmel_serial_suspend,
+ .resume = atmel_serial_resume,
.driver = {
- .name = "at91_usart",
+ .name = "atmel_usart",
.owner = THIS_MODULE,
},
};
-static int __init at91_serial_init(void)
+static int __init atmel_serial_init(void)
{
int ret;
- ret = uart_register_driver(&at91_uart);
+ ret = uart_register_driver(&atmel_uart);
if (ret)
return ret;
- ret = platform_driver_register(&at91_serial_driver);
+ ret = platform_driver_register(&atmel_serial_driver);
if (ret)
- uart_unregister_driver(&at91_uart);
+ uart_unregister_driver(&atmel_uart);
return ret;
}
-static void __exit at91_serial_exit(void)
+static void __exit atmel_serial_exit(void)
{
- platform_driver_unregister(&at91_serial_driver);
- uart_unregister_driver(&at91_uart);
+ platform_driver_unregister(&atmel_serial_driver);
+ uart_unregister_driver(&atmel_uart);
}
-module_init(at91_serial_init);
-module_exit(at91_serial_exit);
+module_init(atmel_serial_init);
+module_exit(atmel_serial_exit);
MODULE_AUTHOR("Rick Bronson");
-MODULE_DESCRIPTION("AT91 generic serial port driver");
+MODULE_DESCRIPTION("Atmel AT91 / AT32 serial port driver");
MODULE_LICENSE("GPL");
git.openpandora.org / pandora-kernel.git / blobdiff