mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
a634830004
Refreshed all patches. Compile-tested on: ar71xx Runtime-tested on: ar71xx Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
134 lines
4.4 KiB
Diff
134 lines
4.4 KiB
Diff
--- a/drivers/tty/serial/8250/8250_core.c
|
|
+++ b/drivers/tty/serial/8250/8250_core.c
|
|
@@ -833,6 +833,7 @@ static int serial8250_probe(struct platf
|
|
uart.port.get_mctrl = p->get_mctrl;
|
|
uart.port.pm = p->pm;
|
|
uart.port.dev = &dev->dev;
|
|
+ uart.port.rw_delay = p->rw_delay;
|
|
uart.port.irqflags |= irqflag;
|
|
ret = serial8250_register_8250_port(&uart);
|
|
if (ret < 0) {
|
|
@@ -989,6 +990,7 @@ int serial8250_register_8250_port(struct
|
|
uart->bugs = up->bugs;
|
|
uart->port.mapbase = up->port.mapbase;
|
|
uart->port.mapsize = up->port.mapsize;
|
|
+ uart->port.rw_delay = up->port.rw_delay;
|
|
uart->port.private_data = up->port.private_data;
|
|
uart->tx_loadsz = up->tx_loadsz;
|
|
uart->capabilities = up->capabilities;
|
|
--- a/drivers/tty/serial/serial_core.c
|
|
+++ b/drivers/tty/serial/serial_core.c
|
|
@@ -2259,6 +2259,7 @@ uart_report_port(struct uart_driver *drv
|
|
snprintf(address, sizeof(address),
|
|
"I/O 0x%lx offset 0x%x", port->iobase, port->hub6);
|
|
break;
|
|
+ case UPIO_MEM_DELAY:
|
|
case UPIO_MEM:
|
|
case UPIO_MEM16:
|
|
case UPIO_MEM32:
|
|
@@ -2932,6 +2933,7 @@ int uart_match_port(struct uart_port *po
|
|
case UPIO_HUB6:
|
|
return (port1->iobase == port2->iobase) &&
|
|
(port1->hub6 == port2->hub6);
|
|
+ case UPIO_MEM_DELAY:
|
|
case UPIO_MEM:
|
|
case UPIO_MEM16:
|
|
case UPIO_MEM32:
|
|
--- a/include/linux/serial_8250.h
|
|
+++ b/include/linux/serial_8250.h
|
|
@@ -28,6 +28,7 @@ struct plat_serial8250_port {
|
|
void *private_data;
|
|
unsigned char regshift; /* register shift */
|
|
unsigned char iotype; /* UPIO_* */
|
|
+ unsigned int rw_delay; /* udelay for slower busses IXP4XX Expansion Bus */
|
|
unsigned char hub6;
|
|
upf_t flags; /* UPF_* flags */
|
|
unsigned int type; /* If UPF_FIXED_TYPE */
|
|
--- a/include/linux/serial_core.h
|
|
+++ b/include/linux/serial_core.h
|
|
@@ -152,6 +152,7 @@ struct uart_port {
|
|
#define UPIO_TSI (SERIAL_IO_TSI) /* Tsi108/109 type IO */
|
|
#define UPIO_MEM32BE (SERIAL_IO_MEM32BE) /* 32b big endian */
|
|
#define UPIO_MEM16 (SERIAL_IO_MEM16) /* 16b little endian */
|
|
+#define UPIO_MEM_DELAY (SERIAL_IO_MEM_DELAY)
|
|
|
|
unsigned int read_status_mask; /* driver specific */
|
|
unsigned int ignore_status_mask; /* driver specific */
|
|
@@ -234,6 +235,7 @@ struct uart_port {
|
|
int hw_stopped; /* sw-assisted CTS flow state */
|
|
unsigned int mctrl; /* current modem ctrl settings */
|
|
unsigned int timeout; /* character-based timeout */
|
|
+ unsigned int rw_delay; /* udelay for slow busses, IXP4XX Expansion Bus */
|
|
unsigned int type; /* port type */
|
|
const struct uart_ops *ops;
|
|
unsigned int custom_divisor;
|
|
--- a/drivers/tty/serial/8250/8250_port.c
|
|
+++ b/drivers/tty/serial/8250/8250_port.c
|
|
@@ -383,6 +383,20 @@ static unsigned int mem16_serial_in(stru
|
|
return readw(p->membase + offset);
|
|
}
|
|
|
|
+static unsigned int memdelay_serial_in(struct uart_port *p, int offset)
|
|
+{
|
|
+ struct uart_8250_port *up = (struct uart_8250_port *)p;
|
|
+ udelay(up->port.rw_delay);
|
|
+ return mem_serial_in(p, offset);
|
|
+}
|
|
+
|
|
+static void memdelay_serial_out(struct uart_port *p, int offset, int value)
|
|
+{
|
|
+ struct uart_8250_port *up = (struct uart_8250_port *)p;
|
|
+ udelay(up->port.rw_delay);
|
|
+ mem_serial_out(p, offset, value);
|
|
+}
|
|
+
|
|
static void mem32_serial_out(struct uart_port *p, int offset, int value)
|
|
{
|
|
offset = offset << p->regshift;
|
|
@@ -455,6 +469,11 @@ static void set_io_from_upio(struct uart
|
|
p->serial_out = mem32be_serial_out;
|
|
break;
|
|
|
|
+ case UPIO_MEM_DELAY:
|
|
+ p->serial_in = memdelay_serial_in;
|
|
+ p->serial_out = memdelay_serial_out;
|
|
+ break;
|
|
+
|
|
#ifdef CONFIG_SERIAL_8250_RT288X
|
|
case UPIO_AU:
|
|
p->serial_in = au_serial_in;
|
|
@@ -482,6 +501,7 @@ serial_port_out_sync(struct uart_port *p
|
|
case UPIO_MEM16:
|
|
case UPIO_MEM32:
|
|
case UPIO_MEM32BE:
|
|
+ case UPIO_MEM_DELAY:
|
|
case UPIO_AU:
|
|
p->serial_out(p, offset, value);
|
|
p->serial_in(p, UART_LCR); /* safe, no side-effects */
|
|
@@ -2759,6 +2779,7 @@ static int serial8250_request_std_resour
|
|
case UPIO_MEM32BE:
|
|
case UPIO_MEM16:
|
|
case UPIO_MEM:
|
|
+ case UPIO_MEM_DELAY:
|
|
if (!port->mapbase)
|
|
break;
|
|
|
|
@@ -2797,6 +2818,7 @@ static void serial8250_release_std_resou
|
|
case UPIO_MEM32BE:
|
|
case UPIO_MEM16:
|
|
case UPIO_MEM:
|
|
+ case UPIO_MEM_DELAY:
|
|
if (!port->mapbase)
|
|
break;
|
|
|
|
--- a/include/uapi/linux/serial.h
|
|
+++ b/include/uapi/linux/serial.h
|
|
@@ -70,6 +70,7 @@ struct serial_struct {
|
|
#define SERIAL_IO_TSI 5
|
|
#define SERIAL_IO_MEM32BE 6
|
|
#define SERIAL_IO_MEM16 7
|
|
+#define SERIAL_IO_MEM_DELAY 10
|
|
|
|
#define UART_CLEAR_FIFO 0x01
|
|
#define UART_USE_FIFO 0x02
|