.fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
.flags = UART_CAP_FIFO | UART_CAP_AFE,
},
+/* tx_loadsz is set to 63-bytes instead of 64-bytes to implement
+workaround of errata A-008006 which states that tx_loadsz should be
+configured less than Maximum supported fifo bytes */
+ [PORT_16550A_FSL64] = {
+ .name = "16550A_FSL64",
+ .fifo_size = 64,
+ .tx_loadsz = 63,
+ .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10 |
+ UART_FCR7_64BYTE,
+ .flags = UART_CAP_FIFO,
+ },
};
/* Uart divisor latch read */
}
EXPORT_SYMBOL_GPL(serial8250_clear_and_reinit_fifos);
-static void serial8250_rpm_get(struct uart_8250_port *p)
+void serial8250_rpm_get(struct uart_8250_port *p)
{
if (!(p->capabilities & UART_CAP_RPM))
return;
pm_runtime_get_sync(p->port.dev);
}
+EXPORT_SYMBOL_GPL(serial8250_rpm_get);
-static void serial8250_rpm_put(struct uart_8250_port *p)
+void serial8250_rpm_put(struct uart_8250_port *p)
{
if (!(p->capabilities & UART_CAP_RPM))
return;
pm_runtime_mark_last_busy(p->port.dev);
pm_runtime_put_autosuspend(p->port.dev);
}
+EXPORT_SYMBOL_GPL(serial8250_rpm_put);
/*
- * This two wrapper ensure, that enable_runtime_pm_tx() can be called more than
+ * These two wrappers ensure that enable_runtime_pm_tx() can be called more than
* once and disable_runtime_pm_tx() will still disable RPM because the fifo is
* empty and the HW can idle again.
*/
*/
static void serial8250_set_sleep(struct uart_8250_port *p, int sleep)
{
+ unsigned char lcr = 0, efr = 0;
/*
* Exar UARTs have a SLEEP register that enables or disables
* each UART to enter sleep mode separately. On the XR17V35x the
if (p->capabilities & UART_CAP_SLEEP) {
if (p->capabilities & UART_CAP_EFR) {
+ lcr = serial_in(p, UART_LCR);
+ efr = serial_in(p, UART_EFR);
serial_out(p, UART_LCR, UART_LCR_CONF_MODE_B);
serial_out(p, UART_EFR, UART_EFR_ECB);
serial_out(p, UART_LCR, 0);
serial_out(p, UART_IER, sleep ? UART_IERX_SLEEP : 0);
if (p->capabilities & UART_CAP_EFR) {
serial_out(p, UART_LCR, UART_LCR_CONF_MODE_B);
- serial_out(p, UART_EFR, 0);
- serial_out(p, UART_LCR, 0);
+ serial_out(p, UART_EFR, efr);
+ serial_out(p, UART_LCR, lcr);
}
}
out:
up->port.type = PORT_16650;
up->capabilities |= UART_CAP_EFR | UART_CAP_SLEEP;
} else {
- DEBUG_AUTOCONF("Motorola 8xxx DUART ");
+ serial_out(up, UART_LCR, 0);
+ serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
+ UART_FCR7_64BYTE);
+ status1 = serial_in(up, UART_IIR) >> 5;
+ serial_out(up, UART_FCR, 0);
+ serial_out(up, UART_LCR, 0);
+
+ if (status1 == 7)
+ up->port.type = PORT_16550A_FSL64;
+ else
+ DEBUG_AUTOCONF("Motorola 8xxx DUART ");
}
serial_out(up, UART_EFR, 0);
return;
struct uart_8250_port *up = up_to_u8250p(port);
serial8250_rpm_get_tx(up);
- if (up->dma && !serial8250_tx_dma(up)) {
+ if (up->dma && !up->dma->tx_dma(up)) {
return;
} else if (!(up->ier & UART_IER_THRI)) {
up->ier |= UART_IER_THRI;
serial8250_rpm_put(up);
}
+static void serial8250_disable_ms(struct uart_port *port)
+{
+ struct uart_8250_port *up =
+ container_of(port, struct uart_8250_port, port);
+
+ /* no MSR capabilities */
+ if (up->bugs & UART_BUG_NOMSR)
+ return;
+
+ up->ier &= ~UART_IER_MSI;
+ serial_port_out(port, UART_IER, up->ier);
+}
+
static void serial8250_enable_ms(struct uart_port *port)
{
struct uart_8250_port *up = up_to_u8250p(port);
ignore_char:
lsr = serial_in(up, UART_LSR);
- } while ((lsr & (UART_LSR_DR | UART_LSR_BI)) && (max_count-- > 0));
+ } while ((lsr & (UART_LSR_DR | UART_LSR_BI)) && (--max_count > 0));
spin_unlock(&port->lock);
tty_flip_buffer_push(&port->state->port);
spin_lock(&port->lock);
DEBUG_INTR("THRE...");
/*
- * With RPM enabled, we have to wait once the FIFO is empty before the
+ * With RPM enabled, we have to wait until the FIFO is empty before the
* HW can go idle. So we get here once again with empty FIFO and disable
* the interrupt and RPM in __stop_tx()
*/
if (status & (UART_LSR_DR | UART_LSR_BI)) {
if (up->dma)
- dma_err = serial8250_rx_dma(up, iir);
+ dma_err = up->dma->rx_dma(up, iir);
if (!up->dma || dma_err)
status = serial8250_rx_chars(up, status);
}
serial8250_modem_status(up);
- if (!up->dma && (status & UART_LSR_THRE))
+ if ((!up->dma || (up->dma && up->dma->tx_err)) &&
+ (status & UART_LSR_THRE))
serial8250_tx_chars(up);
spin_unlock_irqrestore(&port->lock, flags);
return ret;
}
-static void serial8250_set_mctrl(struct uart_port *port, unsigned int mctrl)
+void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
struct uart_8250_port *up = up_to_u8250p(port);
unsigned char mcr = 0;
serial_port_out(port, UART_MCR, mcr);
}
+EXPORT_SYMBOL_GPL(serial8250_do_set_mctrl);
+
+static void serial8250_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+ if (port->set_mctrl)
+ return port->set_mctrl(port, mctrl);
+ return serial8250_do_set_mctrl(port, mctrl);
+}
static void serial8250_break_ctl(struct uart_port *port, int break_state)
{
}
static void
-serial8250_set_ldisc(struct uart_port *port, int new)
+serial8250_set_ldisc(struct uart_port *port, struct ktermios *termios)
{
- if (new == N_PPS) {
+ if (termios->c_line == N_PPS) {
port->flags |= UPF_HARDPPS_CD;
+ spin_lock_irq(&port->lock);
serial8250_enable_ms(port);
- } else
+ spin_unlock_irq(&port->lock);
+ } else {
port->flags &= ~UPF_HARDPPS_CD;
+ if (!UART_ENABLE_MS(port, termios->c_cflag)) {
+ spin_lock_irq(&port->lock);
+ serial8250_disable_ms(port);
+ spin_unlock_irq(&port->lock);
+ }
+ }
}
static unsigned int serial8250_port_size(struct uart_8250_port *pt)
{
- if (pt->port.iotype == UPIO_AU)
+ if (pt->port.iotype == UPIO_AU) {
+ if (pt->port.type == PORT_RT2880)
+ return 0x100;
return 0x1000;
+ }
if (is_omap1_8250(pt))
return 0x16 << pt->port.regshift;
return 0;
}
-static int serial8250_ioctl(struct uart_port *port, unsigned int cmd,
- unsigned long arg)
-{
- struct uart_8250_port *up =
- container_of(port, struct uart_8250_port, port);
- int ret;
- struct serial_rs485 rs485_config;
-
- if (!up->rs485_config)
- return -ENOIOCTLCMD;
-
- switch (cmd) {
- case TIOCSRS485:
- if (copy_from_user(&rs485_config, (void __user *)arg,
- sizeof(rs485_config)))
- return -EFAULT;
-
- ret = up->rs485_config(up, &rs485_config);
- if (ret)
- return ret;
-
- memcpy(&up->rs485, &rs485_config, sizeof(rs485_config));
-
- return 0;
- case TIOCGRS485:
- if (copy_to_user((void __user *)arg, &up->rs485,
- sizeof(up->rs485)))
- return -EFAULT;
- return 0;
- default:
- break;
- }
-
- return -ENOIOCTLCMD;
-}
-
static const char *
serial8250_type(struct uart_port *port)
{
.request_port = serial8250_request_port,
.config_port = serial8250_config_port,
.verify_port = serial8250_verify_port,
- .ioctl = serial8250_ioctl,
#ifdef CONFIG_CONSOLE_POLL
.poll_get_char = serial8250_get_poll_char,
.poll_put_char = serial8250_put_poll_char,
serial8250_rpm_get(up);
- if (port->sysrq || oops_in_progress)
+ if (port->sysrq)
+ locked = 0;
+ else if (oops_in_progress)
locked = spin_trylock_irqsave(&port->lock, flags);
else
spin_lock_irqsave(&port->lock, flags);
serial8250_rpm_put(up);
}
-static int __init serial8250_console_setup(struct console *co, char *options)
+static int serial8250_console_setup(struct console *co, char *options)
{
struct uart_port *port;
int baud = 9600;
.resume = serial8250_resume,
.driver = {
.name = "serial8250",
- .owner = THIS_MODULE,
},
};
uart->port.fifosize = up->port.fifosize;
uart->tx_loadsz = up->tx_loadsz;
uart->capabilities = up->capabilities;
- uart->rs485_config = up->rs485_config;
- uart->rs485 = up->rs485;
uart->port.throttle = up->port.throttle;
uart->port.unthrottle = up->port.unthrottle;
+ uart->port.rs485_config = up->port.rs485_config;
+ uart->port.rs485 = up->port.rs485;
/* Take tx_loadsz from fifosize if it wasn't set separately */
if (uart->port.fifosize && !uart->tx_loadsz)
/* Possibly override set_termios call */
if (up->port.set_termios)
uart->port.set_termios = up->port.set_termios;
+ if (up->port.set_mctrl)
+ uart->port.set_mctrl = up->port.set_mctrl;
if (up->port.startup)
uart->port.startup = up->port.startup;
if (up->port.shutdown)
uart->dl_read = up->dl_read;
if (up->dl_write)
uart->dl_write = up->dl_write;
- if (up->dma)
+ if (up->dma) {
uart->dma = up->dma;
+ if (!uart->dma->tx_dma)
+ uart->dma->tx_dma = serial8250_tx_dma;
+ if (!uart->dma->rx_dma)
+ uart->dma->rx_dma = serial8250_rx_dma;
+ }
if (serial8250_isa_config != NULL)
serial8250_isa_config(0, &uart->port,
projects / firefly-linux-kernel-4.4.55.git / blobdiff