mirror of
git://git.openwrt.org/openwrt/openwrt.git
synced 2024-12-16 03:44:39 +00:00
ixp4xx: split out new UART I/O to its own patch
This is being done for general cleanup Signed-off-by: Tim Harvey <tharvey@gateworks.com> SVN-Revision: 33642
This commit is contained in:
Felix Fietkau
parent
1abbe676d1
commit
d3567cc886
122
target/linux/ixp4xx/patches-3.3/160-delayed_uart_io.patch
Normal file
122
target/linux/ixp4xx/patches-3.3/160-delayed_uart_io.patch
Normal file
@ -0,0 +1,122 @@
|
||||
Add a new UART I/O type for slow busses such as the ixp4xx expansion bus
|
||||
--- 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
|
||||
@@ -324,6 +324,7 @@ struct uart_port {
|
||||
#define UPIO_AU (4) /* Au1x00 type IO */
|
||||
#define UPIO_TSI (5) /* Tsi108/109 type IO */
|
||||
#define UPIO_RM9000 (6) /* RM9000 type IO */
|
||||
+#define UPIO_MEM_DELAY (7)
|
||||
|
||||
unsigned int read_status_mask; /* driver specific */
|
||||
unsigned int ignore_status_mask; /* driver specific */
|
||||
@@ -368,6 +369,7 @@ struct uart_port {
|
||||
|
||||
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.c
|
||||
+++ b/drivers/tty/serial/8250/8250.c
|
||||
@@ -400,6 +400,20 @@ 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 = map_8250_out_reg(p, offset) << p->regshift;
|
||||
@@ -459,6 +473,11 @@ 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;
|
||||
+
|
||||
case UPIO_AU:
|
||||
p->serial_in = au_serial_in;
|
||||
p->serial_out = au_serial_out;
|
||||
@@ -481,6 +500,7 @@ serial_out_sync(struct uart_8250_port *u
|
||||
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 */
|
||||
@@ -2498,6 +2518,7 @@ static int serial8250_request_std_resour
|
||||
case UPIO_TSI:
|
||||
case UPIO_MEM32:
|
||||
case UPIO_MEM:
|
||||
+ case UPIO_MEM_DELAY:
|
||||
if (!up->port.mapbase)
|
||||
break;
|
||||
|
||||
@@ -2534,6 +2555,7 @@ static void serial8250_release_std_resou
|
||||
case UPIO_TSI:
|
||||
case UPIO_MEM32:
|
||||
case UPIO_MEM:
|
||||
+ case UPIO_MEM_DELAY:
|
||||
if (!up->port.mapbase)
|
||||
break;
|
||||
|
||||
@@ -3050,6 +3072,7 @@ static int __devinit serial8250_probe(st
|
||||
port.set_termios = p->set_termios;
|
||||
port.pm = p->pm;
|
||||
port.dev = &dev->dev;
|
||||
+ port.rw_delay = p->rw_delay;
|
||||
port.irqflags |= irqflag;
|
||||
ret = serial8250_register_port(&port);
|
||||
if (ret < 0) {
|
||||
@@ -3199,6 +3222,7 @@ int serial8250_register_port(struct uart
|
||||
uart->port.iotype = port->iotype;
|
||||
uart->port.flags = port->flags | UPF_BOOT_AUTOCONF;
|
||||
uart->port.mapbase = port->mapbase;
|
||||
+ uart->port.rw_delay = port->rw_delay;
|
||||
uart->port.private_data = port->private_data;
|
||||
if (port->dev)
|
||||
uart->port.dev = port->dev;
|
||||
--- a/drivers/tty/serial/serial_core.c
|
||||
+++ b/drivers/tty/serial/serial_core.c
|
||||
@@ -2021,6 +2021,7 @@ 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:
|
||||
@@ -2435,6 +2436,7 @@ 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:
|
||||
@ -94,124 +94,3 @@
|
||||
platform_device_register(&cambria_npec_device);
|
||||
platform_device_register(&cambria_npea_device);
|
||||
|
||||
--- 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
|
||||
@@ -324,6 +324,7 @@ struct uart_port {
|
||||
#define UPIO_AU (4) /* Au1x00 type IO */
|
||||
#define UPIO_TSI (5) /* Tsi108/109 type IO */
|
||||
#define UPIO_RM9000 (6) /* RM9000 type IO */
|
||||
+#define UPIO_MEM_DELAY (7)
|
||||
|
||||
unsigned int read_status_mask; /* driver specific */
|
||||
unsigned int ignore_status_mask; /* driver specific */
|
||||
@@ -368,6 +369,7 @@ struct uart_port {
|
||||
|
||||
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.c
|
||||
+++ b/drivers/tty/serial/8250/8250.c
|
||||
@@ -400,6 +400,20 @@ 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 = map_8250_out_reg(p, offset) << p->regshift;
|
||||
@@ -459,6 +473,11 @@ 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;
|
||||
+
|
||||
case UPIO_AU:
|
||||
p->serial_in = au_serial_in;
|
||||
p->serial_out = au_serial_out;
|
||||
@@ -481,6 +500,7 @@ serial_out_sync(struct uart_8250_port *u
|
||||
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 */
|
||||
@@ -2498,6 +2518,7 @@ static int serial8250_request_std_resour
|
||||
case UPIO_TSI:
|
||||
case UPIO_MEM32:
|
||||
case UPIO_MEM:
|
||||
+ case UPIO_MEM_DELAY:
|
||||
if (!up->port.mapbase)
|
||||
break;
|
||||
|
||||
@@ -2534,6 +2555,7 @@ static void serial8250_release_std_resou
|
||||
case UPIO_TSI:
|
||||
case UPIO_MEM32:
|
||||
case UPIO_MEM:
|
||||
+ case UPIO_MEM_DELAY:
|
||||
if (!up->port.mapbase)
|
||||
break;
|
||||
|
||||
@@ -3050,6 +3072,7 @@ static int __devinit serial8250_probe(st
|
||||
port.set_termios = p->set_termios;
|
||||
port.pm = p->pm;
|
||||
port.dev = &dev->dev;
|
||||
+ port.rw_delay = p->rw_delay;
|
||||
port.irqflags |= irqflag;
|
||||
ret = serial8250_register_port(&port);
|
||||
if (ret < 0) {
|
||||
@@ -3199,6 +3222,7 @@ int serial8250_register_port(struct uart
|
||||
uart->port.iotype = port->iotype;
|
||||
uart->port.flags = port->flags | UPF_BOOT_AUTOCONF;
|
||||
uart->port.mapbase = port->mapbase;
|
||||
+ uart->port.rw_delay = port->rw_delay;
|
||||
uart->port.private_data = port->private_data;
|
||||
if (port->dev)
|
||||
uart->port.dev = port->dev;
|
||||
--- a/drivers/tty/serial/serial_core.c
|
||||
+++ b/drivers/tty/serial/serial_core.c
|
||||
@@ -2021,6 +2021,7 @@ 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:
|
||||
@@ -2435,6 +2436,7 @@ 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:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user