From 99768ccb7c7593c36ebca250bd5cbe1d6b74d166 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 13 Apr 2012 13:38:49 +0000
Subject: ixp4xx: add support for linux 3.3.1
SVN-Revision: 31275
---
.../patches-3.3/191-cambria_optional_uart.patch | 217 +++++++++++++++++++++
1 file changed, 217 insertions(+)
create mode 100644 target/linux/ixp4xx/patches-3.3/191-cambria_optional_uart.patch
(limited to 'target/linux/ixp4xx/patches-3.3/191-cambria_optional_uart.patch')
diff --git a/target/linux/ixp4xx/patches-3.3/191-cambria_optional_uart.patch b/target/linux/ixp4xx/patches-3.3/191-cambria_optional_uart.patch
new file mode 100644
index 0000000..636ebd7
--- /dev/null
+++ b/target/linux/ixp4xx/patches-3.3/191-cambria_optional_uart.patch
@@ -0,0 +1,217 @@
+--- a/arch/arm/mach-ixp4xx/cambria-setup.c
++++ b/arch/arm/mach-ixp4xx/cambria-setup.c
+@@ -34,6 +34,7 @@
+ #include <asm/mach/arch.h>
+ #include <asm/mach/flash.h>
+ #include <asm/setup.h>
++#include <linux/irq.h>
+
+ struct cambria_board_info {
+ unsigned char *model;
+@@ -127,6 +128,45 @@ static struct platform_device cambria_ua
+ .resource = &cambria_uart_resource,
+ };
+
++static struct resource cambria_optional_uart_resources[] = {
++ {
++ .start = 0x52000000,
++ .end = 0x52000fff,
++ .flags = IORESOURCE_MEM
++ },
++ {
++ .start = 0x53000000,
++ .end = 0x53000fff,
++ .flags = IORESOURCE_MEM
++ }
++};
++
++static struct plat_serial8250_port cambria_optional_uart_data[] = {
++ {
++ .flags = UPF_BOOT_AUTOCONF,
++ .iotype = UPIO_MEM_DELAY,
++ .regshift = 0,
++ .uartclk = 1843200,
++ .rw_delay = 2,
++ },
++ {
++ .flags = UPF_BOOT_AUTOCONF,
++ .iotype = UPIO_MEM_DELAY,
++ .regshift = 0,
++ .uartclk = 1843200,
++ .rw_delay = 2,
++ },
++ { },
++};
++
++static struct platform_device cambria_optional_uart = {
++ .name = "serial8250",
++ .id = PLAT8250_DEV_PLATFORM1,
++ .dev.platform_data = cambria_optional_uart_data,
++ .num_resources = 2,
++ .resource = cambria_optional_uart_resources,
++};
++
+ static struct resource cambria_pata_resources[] = {
+ {
+ .flags = IORESOURCE_MEM
+@@ -283,6 +323,19 @@ static void __init cambria_gw23xx_setup(
+
+ static void __init cambria_gw2350_setup(void)
+ {
++ *IXP4XX_EXP_CS2 = 0xBFFF3C43;
++ irq_set_irq_type(IRQ_IXP4XX_GPIO3, IRQ_TYPE_EDGE_RISING);
++ cambria_optional_uart_data[0].mapbase = 0x52FF0000;
++ cambria_optional_uart_data[0].membase = (void __iomem *)ioremap(0x52FF0000, 0x0fff);
++ cambria_optional_uart_data[0].irq = IRQ_IXP4XX_GPIO3;
++
++ *IXP4XX_EXP_CS3 = 0xBFFF3C43;
++ irq_set_irq_type(IRQ_IXP4XX_GPIO4, IRQ_TYPE_EDGE_RISING);
++ cambria_optional_uart_data[1].mapbase = 0x53FF0000;
++ cambria_optional_uart_data[1].membase = (void __iomem *)ioremap(0x53FF0000, 0x0fff);
++ cambria_optional_uart_data[1].irq = IRQ_IXP4XX_GPIO4;
++
++ platform_device_register(&cambria_optional_uart);
+ platform_device_register(&cambria_npec_device);
+ platform_device_register(&cambria_npea_device);
+
+@@ -294,6 +347,19 @@ static void __init cambria_gw2350_setup(
+
+ static void __init cambria_gw2358_setup(void)
+ {
++ *IXP4XX_EXP_CS3 = 0xBFFF3C43;
++ irq_set_irq_type(IRQ_IXP4XX_GPIO3, IRQ_TYPE_EDGE_RISING);
++ cambria_optional_uart_data[0].mapbase = 0x53FC0000;
++ cambria_optional_uart_data[0].membase = (void __iomem *)ioremap(0x53FC0000, 0x0fff);
++ cambria_optional_uart_data[0].irq = IRQ_IXP4XX_GPIO3;
++
++ irq_set_irq_type(IRQ_IXP4XX_GPIO4, IRQ_TYPE_EDGE_RISING);
++ cambria_optional_uart_data[1].mapbase = 0x53F80000;
++ cambria_optional_uart_data[1].membase = (void __iomem *)ioremap(0x53F80000, 0x0fff);
++ cambria_optional_uart_data[1].irq = IRQ_IXP4XX_GPIO4;
++
++ platform_device_register(&cambria_optional_uart);
++
+ 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:
--
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