76d079204d
Changelogs: * https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.12 * https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.13 * https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.14 Build tested on brcm63xx and ipq806x, runtested on brcm63xx. Signed-off-by: Jonas Gorski <jogo@openwrt.org> SVN-Revision: 45711
121 lines
4 KiB
Diff
121 lines
4 KiB
Diff
--- a/drivers/tty/serial/8250/8250_core.c
|
|
+++ b/drivers/tty/serial/8250/8250_core.c
|
|
@@ -416,6 +416,20 @@ static void mem_serial_out(struct uart_p
|
|
writeb(value, 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;
|
|
@@ -466,6 +480,11 @@ static void set_io_from_upio(struct uart
|
|
p->serial_out = mem32_serial_out;
|
|
break;
|
|
|
|
+ case UPIO_MEM_DELAY:
|
|
+ p->serial_in = memdelay_serial_in;
|
|
+ p->serial_out = memdelay_serial_out;
|
|
+ break;
|
|
+
|
|
#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
|
|
case UPIO_AU:
|
|
p->serial_in = au_serial_in;
|
|
@@ -491,6 +510,7 @@ serial_port_out_sync(struct uart_port *p
|
|
switch (p->iotype) {
|
|
case UPIO_MEM:
|
|
case UPIO_MEM32:
|
|
+ case UPIO_MEM_DELAY:
|
|
case UPIO_AU:
|
|
p->serial_out(p, offset, value);
|
|
p->serial_in(p, UART_LCR); /* safe, no side-effects */
|
|
@@ -2655,6 +2675,7 @@ static int serial8250_request_std_resour
|
|
case UPIO_TSI:
|
|
case UPIO_MEM32:
|
|
case UPIO_MEM:
|
|
+ case UPIO_MEM_DELAY:
|
|
if (!port->mapbase)
|
|
break;
|
|
|
|
@@ -2691,6 +2712,7 @@ static void serial8250_release_std_resou
|
|
case UPIO_TSI:
|
|
case UPIO_MEM32:
|
|
case UPIO_MEM:
|
|
+ case UPIO_MEM_DELAY:
|
|
if (!port->mapbase)
|
|
break;
|
|
|
|
@@ -3424,6 +3446,7 @@ static int serial8250_probe(struct platf
|
|
uart.port.set_termios = p->set_termios;
|
|
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) {
|
|
@@ -3580,6 +3603,7 @@ int serial8250_register_8250_port(struct
|
|
uart->port.flags = up->port.flags | UPF_BOOT_AUTOCONF;
|
|
uart->bugs = up->bugs;
|
|
uart->port.mapbase = up->port.mapbase;
|
|
+ uart->port.rw_delay = up->port.rw_delay;
|
|
uart->port.private_data = up->port.private_data;
|
|
uart->port.fifosize = up->port.fifosize;
|
|
uart->tx_loadsz = up->tx_loadsz;
|
|
--- a/drivers/tty/serial/serial_core.c
|
|
+++ b/drivers/tty/serial/serial_core.c
|
|
@@ -2090,6 +2090,7 @@ 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_MEM32:
|
|
case UPIO_AU:
|
|
@@ -2736,6 +2737,7 @@ 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_MEM32:
|
|
case UPIO_AU:
|
|
--- a/include/linux/serial_8250.h
|
|
+++ b/include/linux/serial_8250.h
|
|
@@ -27,6 +27,7 @@ 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
|
|
@@ -146,6 +146,7 @@ struct uart_port {
|
|
#define UPIO_MEM32 (3)
|
|
#define UPIO_AU (4) /* Au1x00 and RT288x type IO */
|
|
#define UPIO_TSI (5) /* Tsi108/109 type IO */
|
|
+#define UPIO_MEM_DELAY (6)
|
|
|
|
unsigned int read_status_mask; /* driver specific */
|
|
unsigned int ignore_status_mask; /* driver specific */
|
|
@@ -202,6 +203,7 @@ 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;
|