* published by the Free Software Foundation.
*
* Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
- *
- * Revision History:
- * 0.30 Initial revision. (Renamed from serial_txx927.c)
- * 0.31 Use save_flags instead of local_irq_save.
- * 0.32 Support SCLK.
- * 0.33 Switch TXX9_TTY_NAME by CONFIG_SERIAL_TXX9_STDSERIAL.
- * Support TIOCSERGETLSR.
- * 0.34 Support slow baudrate.
- * 0.40 Merge codes from mainstream kernel (2.4.22).
- * 0.41 Fix console checking in rs_shutdown_port().
- * Disable flow-control in serial_console_write().
- * 0.42 Fix minor compiler warning.
- * 1.00 Kernel 2.6. Converted to new serial core (based on 8250.c).
- * 1.01 Set fifosize to make tx_empry called properly.
- * Use standard uart_get_divisor.
- * 1.02 Cleanup. (import 8250.c changes)
- * 1.03 Fix low-latency mode. (import 8250.c changes)
- * 1.04 Remove usage of deprecated functions, cleanup.
*/
-#include <linux/config.h>
#if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/console.h>
-#include <linux/sysrq.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/pci.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
#include <asm/io.h>
-#include <asm/irq.h>
-static char *serial_version = "1.04";
+static char *serial_version = "1.11";
static char *serial_name = "TX39/49 Serial driver";
#define PASS_LIMIT 256
#if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
/* "ttyS" is used for standard serial driver */
#define TXX9_TTY_NAME "ttyTX"
-#define TXX9_TTY_DEVFS_NAME "tttx/"
-#define TXX9_TTY_MINOR_START (64 + 64) /* ttyTX0(128), ttyTX1(129) */
+#define TXX9_TTY_MINOR_START 196
+#define TXX9_TTY_MAJOR 204
#else
/* acts like standard serial driver */
#define TXX9_TTY_NAME "ttyS"
-#define TXX9_TTY_DEVFS_NAME "tts/"
#define TXX9_TTY_MINOR_START 64
-#endif
#define TXX9_TTY_MAJOR TTY_MAJOR
+#endif
/* flag aliases */
#define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART
/*
* Number of serial ports
*/
-#ifdef ENABLE_SERIAL_TXX9_PCI
-#define NR_PCI_BOARDS 4
-#define UART_NR (4 + NR_PCI_BOARDS)
-#else
-#define UART_NR 4
-#endif
+#define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS
struct uart_txx9_port {
struct uart_port port;
-
- /*
- * We provide a per-port pm hook.
- */
- void (*pm)(struct uart_port *port,
- unsigned int state, unsigned int old);
+ /* No additional info for now */
};
#define TXX9_REGION_SIZE 0x24
{
switch (up->port.iotype) {
default:
- return *(volatile u32 *)(up->port.membase + offset);
+ return __raw_readl(up->port.membase + offset);
case UPIO_PORT:
return inl(up->port.iobase + offset);
}
{
switch (up->port.iotype) {
default:
- *(volatile u32 *)(up->port.membase + offset) = value;
+ __raw_writel(value, up->port.membase + offset);
break;
case UPIO_PORT:
outl(value, up->port.iobase + offset);
sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
}
-static void serial_txx9_stop_tx(struct uart_port *port)
+static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
- unsigned long flags;
+ return container_of(port, struct uart_txx9_port, port);
+}
- spin_lock_irqsave(&up->port.lock, flags);
+static void serial_txx9_stop_tx(struct uart_port *port)
+{
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
- spin_unlock_irqrestore(&up->port.lock, flags);
}
static void serial_txx9_start_tx(struct uart_port *port)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
- spin_unlock_irqrestore(&up->port.lock, flags);
}
static void serial_txx9_stop_rx(struct uart_port *port)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
-#if 0
- sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
-#endif
- spin_unlock_irqrestore(&up->port.lock, flags);
}
static void serial_txx9_enable_ms(struct uart_port *port)
/* TXX9-SIO can not control DTR... */
}
+static void serial_txx9_initialize(struct uart_port *port)
+{
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
+ unsigned int tmout = 10000;
+
+ sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
+ /* TX4925 BUG WORKAROUND. Accessing SIOC register
+ * immediately after soft reset causes bus error. */
+ mmiowb();
+ udelay(1);
+ while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
+ udelay(1);
+ /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
+ sio_set(up, TXX9_SIFCR,
+ TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
+ /* initial settings */
+ sio_out(up, TXX9_SILCR,
+ TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
+ ((up->port.flags & UPF_TXX9_USE_SCLK) ?
+ TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
+ sio_quot_set(up, uart_get_divisor(port, 9600));
+ sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
+ sio_out(up, TXX9_SIDICR, 0);
+}
+
static inline void
-receive_chars(struct uart_txx9_port *up, unsigned int *status, struct pt_regs *regs)
+receive_chars(struct uart_txx9_port *up, unsigned int *status)
{
- struct tty_struct *tty = up->port.info->tty;
+ struct tty_struct *tty = up->port.state->port.tty;
unsigned char ch;
unsigned int disr = *status;
int max_count = 256;
char flag;
+ unsigned int next_ignore_status_mask;
do {
- /* The following is not allowed by the tty layer and
- unsafe. It should be fixed ASAP */
- if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) {
- if (tty->low_latency) {
- spin_unlock(&up->port.lock);
- tty_flip_buffer_push(tty);
- spin_lock(&up->port.lock);
- }
- /* If this failed then we will throw away the
- bytes but must do so to clear interrupts */
- }
ch = sio_in(up, TXX9_SIRFIFO);
flag = TTY_NORMAL;
up->port.icount.rx++;
+ /* mask out RFDN_MASK bit added by previous overrun */
+ next_ignore_status_mask =
+ up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
/*
up->port.icount.parity++;
else if (disr & TXX9_SIDISR_UFER)
up->port.icount.frame++;
- if (disr & TXX9_SIDISR_UOER)
+ if (disr & TXX9_SIDISR_UOER) {
up->port.icount.overrun++;
+ /*
+ * The receiver read buffer still hold
+ * a char which caused overrun.
+ * Ignore next char by adding RFDN_MASK
+ * to ignore_status_mask temporarily.
+ */
+ next_ignore_status_mask |=
+ TXX9_SIDISR_RFDN_MASK;
+ }
/*
* Mask off conditions which should be ingored.
else if (disr & TXX9_SIDISR_UFER)
flag = TTY_FRAME;
}
- if (uart_handle_sysrq_char(&up->port, ch, regs))
+ if (uart_handle_sysrq_char(&up->port, ch))
goto ignore_char;
uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
ignore_char:
+ up->port.ignore_status_mask = next_ignore_status_mask;
disr = sio_in(up, TXX9_SIDISR);
} while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
spin_unlock(&up->port.lock);
static inline void transmit_chars(struct uart_txx9_port *up)
{
- struct circ_buf *xmit = &up->port.info->xmit;
+ struct circ_buf *xmit = &up->port.state->xmit;
int count;
if (up->port.x_char) {
serial_txx9_stop_tx(&up->port);
}
-static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
{
int pass_counter = 0;
struct uart_txx9_port *up = dev_id;
}
if (status & TXX9_SIDISR_RDIS)
- receive_chars(up, &status, regs);
+ receive_chars(up, &status);
if (status & TXX9_SIDISR_TDIS)
transmit_chars(up);
/* Clear TX/RX Int. Status */
static unsigned int serial_txx9_tx_empty(struct uart_port *port)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
unsigned long flags;
unsigned int ret;
static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
unsigned int ret;
- ret = ((sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS)
- | ((sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS);
+ /* no modem control lines */
+ ret = TIOCM_CAR | TIOCM_DSR;
+ ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
+ ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
return ret;
}
static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
- unsigned long flags;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
- spin_lock_irqsave(&up->port.lock, flags);
if (mctrl & TIOCM_RTS)
sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
else
sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
- spin_unlock_irqrestore(&up->port.lock, flags);
}
static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
unsigned long flags;
spin_lock_irqsave(&up->port.lock, flags);
spin_unlock_irqrestore(&up->port.lock, flags);
}
+#if defined(CONFIG_SERIAL_TXX9_CONSOLE) || (CONFIG_CONSOLE_POLL)
+/*
+ * Wait for transmitter & holding register to empty
+ */
+static void wait_for_xmitr(struct uart_txx9_port *up)
+{
+ unsigned int tmout = 10000;
+
+ /* Wait up to 10ms for the character(s) to be sent. */
+ while (--tmout &&
+ !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
+ udelay(1);
+
+ /* Wait up to 1s for flow control if necessary */
+ if (up->port.flags & UPF_CONS_FLOW) {
+ tmout = 1000000;
+ while (--tmout &&
+ (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
+ udelay(1);
+ }
+}
+#endif
+
+#ifdef CONFIG_CONSOLE_POLL
+/*
+ * Console polling routines for writing and reading from the uart while
+ * in an interrupt or debug context.
+ */
+
+static int serial_txx9_get_poll_char(struct uart_port *port)
+{
+ unsigned int ier;
+ unsigned char c;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
+
+ /*
+ * First save the IER then disable the interrupts
+ */
+ ier = sio_in(up, TXX9_SIDICR);
+ sio_out(up, TXX9_SIDICR, 0);
+
+ while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
+ ;
+
+ c = sio_in(up, TXX9_SIRFIFO);
+
+ /*
+ * Finally, clear RX interrupt status
+ * and restore the IER
+ */
+ sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
+ sio_out(up, TXX9_SIDICR, ier);
+ return c;
+}
+
+
+static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c)
+{
+ unsigned int ier;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
+
+ /*
+ * First save the IER then disable the interrupts
+ */
+ ier = sio_in(up, TXX9_SIDICR);
+ sio_out(up, TXX9_SIDICR, 0);
+
+ wait_for_xmitr(up);
+ /*
+ * Send the character out.
+ * If a LF, also do CR...
+ */
+ sio_out(up, TXX9_SITFIFO, c);
+ if (c == 10) {
+ wait_for_xmitr(up);
+ sio_out(up, TXX9_SITFIFO, 13);
+ }
+
+ /*
+ * Finally, wait for transmitter to become empty
+ * and restore the IER
+ */
+ wait_for_xmitr(up);
+ sio_out(up, TXX9_SIDICR, ier);
+}
+
+#endif /* CONFIG_CONSOLE_POLL */
+
static int serial_txx9_startup(struct uart_port *port)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
unsigned long flags;
int retval;
/*
* Clear the FIFO buffers and disable them.
- * (they will be reeanbled in set_termios())
+ * (they will be reenabled in set_termios())
*/
sio_set(up, TXX9_SIFCR,
TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
sio_out(up, TXX9_SIDISR, 0);
retval = request_irq(up->port.irq, serial_txx9_interrupt,
- SA_SHIRQ, "serial_txx9", up);
+ IRQF_SHARED, "serial_txx9", up);
if (retval)
return retval;
static void serial_txx9_shutdown(struct uart_port *port)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
unsigned long flags;
/*
}
static void
-serial_txx9_set_termios(struct uart_port *port, struct termios *termios,
- struct termios *old)
+serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
+ struct ktermios *old)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
unsigned int cval, fcr = 0;
unsigned long flags;
unsigned int baud, quot;
+ /*
+ * We don't support modem control lines.
+ */
+ termios->c_cflag &= ~(HUPCL | CMSPAR);
+ termios->c_cflag |= CLOCAL;
+
cval = sio_in(up, TXX9_SILCR);
/* byte size and parity */
cval &= ~TXX9_SILCR_UMODE_MASK;
serial_txx9_pm(struct uart_port *port, unsigned int state,
unsigned int oldstate)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
- if (up->pm)
- up->pm(port, state, oldstate);
+ /*
+ * If oldstate was -1 this is called from
+ * uart_configure_port(). In this case do not initialize the
+ * port now, because the port was already initialized (for
+ * non-console port) or should not be initialized here (for
+ * console port). If we initialized the port here we lose
+ * serial console settings.
+ */
+ if (state == 0 && oldstate != -1)
+ serial_txx9_initialize(port);
}
static int serial_txx9_request_resource(struct uart_txx9_port *up)
static void serial_txx9_release_port(struct uart_port *port)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
serial_txx9_release_resource(up);
}
static int serial_txx9_request_port(struct uart_port *port)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
return serial_txx9_request_resource(up);
}
static void serial_txx9_config_port(struct uart_port *port, int uflags)
{
- struct uart_txx9_port *up = (struct uart_txx9_port *)port;
- unsigned long flags;
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
int ret;
/*
if (up->port.line == up->port.cons->index)
return;
#endif
- spin_lock_irqsave(&up->port.lock, flags);
- /*
- * Reset the UART.
- */
- sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
-#ifdef CONFIG_CPU_TX49XX
- /* TX4925 BUG WORKAROUND. Accessing SIOC register
- * immediately after soft reset causes bus error. */
- iob();
- udelay(1);
-#endif
- while (sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST)
- ;
- /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
- sio_set(up, TXX9_SIFCR,
- TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
- /* initial settings */
- sio_out(up, TXX9_SILCR,
- TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
- ((up->port.flags & UPF_TXX9_USE_SCLK) ?
- TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
- sio_quot_set(up, uart_get_divisor(port, 9600));
- sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static int
-serial_txx9_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
- if (ser->irq < 0 ||
- ser->baud_base < 9600 || ser->type != PORT_TXX9)
- return -EINVAL;
- return 0;
+ serial_txx9_initialize(port);
}
static const char *
.release_port = serial_txx9_release_port,
.request_port = serial_txx9_request_port,
.config_port = serial_txx9_config_port,
- .verify_port = serial_txx9_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_get_char = serial_txx9_get_poll_char,
+ .poll_put_char = serial_txx9_put_poll_char,
+#endif
};
static struct uart_txx9_port serial_txx9_ports[UART_NR];
-static void __init serial_txx9_register_ports(struct uart_driver *drv)
+static void __init serial_txx9_register_ports(struct uart_driver *drv,
+ struct device *dev)
{
int i;
up->port.line = i;
up->port.ops = &serial_txx9_pops;
- uart_add_one_port(drv, &up->port);
+ up->port.dev = dev;
+ if (up->port.iobase || up->port.mapbase)
+ uart_add_one_port(drv, &up->port);
}
}
#ifdef CONFIG_SERIAL_TXX9_CONSOLE
-/*
- * Wait for transmitter & holding register to empty
- */
-static inline void wait_for_xmitr(struct uart_txx9_port *up)
+static void serial_txx9_console_putchar(struct uart_port *port, int ch)
{
- unsigned int tmout = 10000;
-
- /* Wait up to 10ms for the character(s) to be sent. */
- while (--tmout &&
- !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
- udelay(1);
+ struct uart_txx9_port *up = to_uart_txx9_port(port);
- /* Wait up to 1s for flow control if necessary */
- if (up->port.flags & UPF_CONS_FLOW) {
- tmout = 1000000;
- while (--tmout &&
- (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
- udelay(1);
- }
+ wait_for_xmitr(up);
+ sio_out(up, TXX9_SITFIFO, ch);
}
/*
{
struct uart_txx9_port *up = &serial_txx9_ports[co->index];
unsigned int ier, flcr;
- int i;
/*
* First save the UER then disable the interrupts
if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
- /*
- * Now, do each character
- */
- for (i = 0; i < count; i++, s++) {
- wait_for_xmitr(up);
-
- /*
- * Send the character out.
- * If a LF, also do CR...
- */
- sio_out(up, TXX9_SITFIFO, *s);
- if (*s == 10) {
- wait_for_xmitr(up);
- sio_out(up, TXX9_SITFIFO, 13);
- }
- }
+ uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
/*
* Finally, wait for transmitter to become empty
sio_out(up, TXX9_SIDICR, ier);
}
-static int serial_txx9_console_setup(struct console *co, char *options)
+static int __init serial_txx9_console_setup(struct console *co, char *options)
{
struct uart_port *port;
struct uart_txx9_port *up;
if (!port->ops)
return -ENODEV;
- /*
- * Temporary fix.
- */
- spin_lock_init(&port->lock);
-
- /*
- * Disable UART interrupts, set DTR and RTS high
- * and set speed.
- */
- sio_out(up, TXX9_SIDICR, 0);
- /* initial settings */
- sio_out(up, TXX9_SILCR,
- TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
- ((port->flags & UPF_TXX9_USE_SCLK) ?
- TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
- sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
+ serial_txx9_initialize(&up->port);
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
static struct uart_driver serial_txx9_reg = {
.owner = THIS_MODULE,
.driver_name = "serial_txx9",
- .devfs_name = TXX9_TTY_DEVFS_NAME,
.dev_name = TXX9_TTY_NAME,
.major = TXX9_TTY_MAJOR,
.minor = TXX9_TTY_MINOR_START,
serial_txx9_ports[port->line].port = *port;
serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
- serial_txx9_ports[port->line].port.flags |= UPF_BOOT_AUTOCONF;
+ serial_txx9_ports[port->line].port.flags |=
+ UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
return 0;
}
-#ifdef ENABLE_SERIAL_TXX9_PCI
-/**
- * serial_txx9_suspend_port - suspend one serial port
- * @line: serial line number
- * @level: the level of port suspension, as per uart_suspend_port
- *
- * Suspend one serial port.
- */
-static void serial_txx9_suspend_port(int line)
-{
- uart_suspend_port(&serial_txx9_reg, &serial_txx9_ports[line].port);
-}
-
-/**
- * serial_txx9_resume_port - resume one serial port
- * @line: serial line number
- * @level: the level of port resumption, as per uart_resume_port
- *
- * Resume one serial port.
- */
-static void serial_txx9_resume_port(int line)
-{
- uart_resume_port(&serial_txx9_reg, &serial_txx9_ports[line].port);
-}
-
-static DECLARE_MUTEX(serial_txx9_sem);
+static DEFINE_MUTEX(serial_txx9_mutex);
/**
* serial_txx9_register_port - register a serial port
struct uart_txx9_port *uart;
int ret = -ENOSPC;
- down(&serial_txx9_sem);
+ mutex_lock(&serial_txx9_mutex);
for (i = 0; i < UART_NR; i++) {
uart = &serial_txx9_ports[i];
- if (uart->port.type == PORT_UNKNOWN)
+ if (uart_match_port(&uart->port, port)) {
+ uart_remove_one_port(&serial_txx9_reg, &uart->port);
break;
+ }
+ }
+ if (i == UART_NR) {
+ /* Find unused port */
+ for (i = 0; i < UART_NR; i++) {
+ uart = &serial_txx9_ports[i];
+ if (!(uart->port.iobase || uart->port.mapbase))
+ break;
+ }
}
if (i < UART_NR) {
- uart_remove_one_port(&serial_txx9_reg, &uart->port);
uart->port.iobase = port->iobase;
uart->port.membase = port->membase;
uart->port.irq = port->irq;
uart->port.uartclk = port->uartclk;
uart->port.iotype = port->iotype;
- uart->port.flags = port->flags | UPF_BOOT_AUTOCONF;
+ uart->port.flags = port->flags
+ | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
uart->port.mapbase = port->mapbase;
if (port->dev)
uart->port.dev = port->dev;
if (ret == 0)
ret = uart->port.line;
}
- up(&serial_txx9_sem);
+ mutex_unlock(&serial_txx9_mutex);
return ret;
}
{
struct uart_txx9_port *uart = &serial_txx9_ports[line];
- down(&serial_txx9_sem);
+ mutex_lock(&serial_txx9_mutex);
uart_remove_one_port(&serial_txx9_reg, &uart->port);
uart->port.flags = 0;
uart->port.type = PORT_UNKNOWN;
uart->port.iobase = 0;
uart->port.mapbase = 0;
- uart->port.membase = 0;
+ uart->port.membase = NULL;
uart->port.dev = NULL;
- uart_add_one_port(&serial_txx9_reg, &uart->port);
- up(&serial_txx9_sem);
+ mutex_unlock(&serial_txx9_mutex);
+}
+
+/*
+ * Register a set of serial devices attached to a platform device.
+ */
+static int __devinit serial_txx9_probe(struct platform_device *dev)
+{
+ struct uart_port *p = dev->dev.platform_data;
+ struct uart_port port;
+ int ret, i;
+
+ memset(&port, 0, sizeof(struct uart_port));
+ for (i = 0; p && p->uartclk != 0; p++, i++) {
+ port.iobase = p->iobase;
+ port.membase = p->membase;
+ port.irq = p->irq;
+ port.uartclk = p->uartclk;
+ port.iotype = p->iotype;
+ port.flags = p->flags;
+ port.mapbase = p->mapbase;
+ port.dev = &dev->dev;
+ ret = serial_txx9_register_port(&port);
+ if (ret < 0) {
+ dev_err(&dev->dev, "unable to register port at index %d "
+ "(IO%lx MEM%llx IRQ%d): %d\n", i,
+ p->iobase, (unsigned long long)p->mapbase,
+ p->irq, ret);
+ }
+ }
+ return 0;
+}
+
+/*
+ * Remove serial ports registered against a platform device.
+ */
+static int __devexit serial_txx9_remove(struct platform_device *dev)
+{
+ int i;
+
+ for (i = 0; i < UART_NR; i++) {
+ struct uart_txx9_port *up = &serial_txx9_ports[i];
+
+ if (up->port.dev == &dev->dev)
+ serial_txx9_unregister_port(i);
+ }
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
+{
+ int i;
+
+ for (i = 0; i < UART_NR; i++) {
+ struct uart_txx9_port *up = &serial_txx9_ports[i];
+
+ if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
+ uart_suspend_port(&serial_txx9_reg, &up->port);
+ }
+
+ return 0;
}
+static int serial_txx9_resume(struct platform_device *dev)
+{
+ int i;
+
+ for (i = 0; i < UART_NR; i++) {
+ struct uart_txx9_port *up = &serial_txx9_ports[i];
+
+ if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
+ uart_resume_port(&serial_txx9_reg, &up->port);
+ }
+
+ return 0;
+}
+#endif
+
+static struct platform_driver serial_txx9_plat_driver = {
+ .probe = serial_txx9_probe,
+ .remove = __devexit_p(serial_txx9_remove),
+#ifdef CONFIG_PM
+ .suspend = serial_txx9_suspend,
+ .resume = serial_txx9_resume,
+#endif
+ .driver = {
+ .name = "serial_txx9",
+ .owner = THIS_MODULE,
+ },
+};
+
+#ifdef ENABLE_SERIAL_TXX9_PCI
/*
* Probe one serial board. Unfortunately, there is no rhyme nor reason
* to the arrangement of serial ports on a PCI card.
line = serial_txx9_register_port(&port);
if (line < 0) {
printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
+ pci_disable_device(dev);
+ return line;
}
- pci_set_drvdata(dev, (void *)(long)line);
+ pci_set_drvdata(dev, &serial_txx9_ports[line]);
return 0;
}
static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
{
- int line = (int)(long)pci_get_drvdata(dev);
+ struct uart_txx9_port *up = pci_get_drvdata(dev);
pci_set_drvdata(dev, NULL);
- if (line) {
- serial_txx9_unregister_port(line);
+ if (up) {
+ serial_txx9_unregister_port(up->port.line);
pci_disable_device(dev);
}
}
+#ifdef CONFIG_PM
static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
{
- int line = (int)(long)pci_get_drvdata(dev);
+ struct uart_txx9_port *up = pci_get_drvdata(dev);
- if (line)
- serial_txx9_suspend_port(line);
+ if (up)
+ uart_suspend_port(&serial_txx9_reg, &up->port);
pci_save_state(dev);
pci_set_power_state(dev, pci_choose_state(dev, state));
return 0;
static int pciserial_txx9_resume_one(struct pci_dev *dev)
{
- int line = (int)(long)pci_get_drvdata(dev);
+ struct uart_txx9_port *up = pci_get_drvdata(dev);
pci_set_power_state(dev, PCI_D0);
pci_restore_state(dev);
-
- if (line) {
- pci_enable_device(dev);
- serial_txx9_resume_port(line);
- }
+ if (up)
+ uart_resume_port(&serial_txx9_reg, &up->port);
return 0;
}
+#endif
-static struct pci_device_id serial_txx9_pci_tbl[] = {
- { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC,
- PCI_ANY_ID, PCI_ANY_ID,
- 0, 0, 0 },
+static const struct pci_device_id serial_txx9_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
{ 0, }
};
.name = "serial_txx9",
.probe = pciserial_txx9_init_one,
.remove = __devexit_p(pciserial_txx9_remove_one),
+#ifdef CONFIG_PM
.suspend = pciserial_txx9_suspend_one,
.resume = pciserial_txx9_resume_one,
+#endif
.id_table = serial_txx9_pci_tbl,
};
MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
#endif /* ENABLE_SERIAL_TXX9_PCI */
+static struct platform_device *serial_txx9_plat_devs;
+
static int __init serial_txx9_init(void)
{
int ret;
printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
ret = uart_register_driver(&serial_txx9_reg);
- if (ret >= 0) {
- serial_txx9_register_ports(&serial_txx9_reg);
+ if (ret)
+ goto out;
+
+ serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
+ if (!serial_txx9_plat_devs) {
+ ret = -ENOMEM;
+ goto unreg_uart_drv;
+ }
+
+ ret = platform_device_add(serial_txx9_plat_devs);
+ if (ret)
+ goto put_dev;
+
+ serial_txx9_register_ports(&serial_txx9_reg,
+ &serial_txx9_plat_devs->dev);
+
+ ret = platform_driver_register(&serial_txx9_plat_driver);
+ if (ret)
+ goto del_dev;
#ifdef ENABLE_SERIAL_TXX9_PCI
- ret = pci_module_init(&serial_txx9_pci_driver);
+ ret = pci_register_driver(&serial_txx9_pci_driver);
#endif
- }
+ if (ret == 0)
+ goto out;
+
+ del_dev:
+ platform_device_del(serial_txx9_plat_devs);
+ put_dev:
+ platform_device_put(serial_txx9_plat_devs);
+ unreg_uart_drv:
+ uart_unregister_driver(&serial_txx9_reg);
+ out:
return ret;
}
#ifdef ENABLE_SERIAL_TXX9_PCI
pci_unregister_driver(&serial_txx9_pci_driver);
#endif
- for (i = 0; i < UART_NR; i++)
- uart_remove_one_port(&serial_txx9_reg, &serial_txx9_ports[i].port);
+ platform_driver_unregister(&serial_txx9_plat_driver);
+ platform_device_unregister(serial_txx9_plat_devs);
+ for (i = 0; i < UART_NR; i++) {
+ struct uart_txx9_port *up = &serial_txx9_ports[i];
+ if (up->port.iobase || up->port.mapbase)
+ uart_remove_one_port(&serial_txx9_reg, &up->port);
+ }
uart_unregister_driver(&serial_txx9_reg);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff