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Subject[PATCH v3] ARM: LPC32xx: Ethernet support
Date
This patch adds ethernet support to the LPC32xx ARM architecture. The actual
driver in drivers/net is contained in a separate patch.

Signed-off-by: Roland Stigge <stigge@antcom.de>

---
arch/arm/mach-lpc32xx/Kconfig | 26 ++++++++++++++++++++++
arch/arm/mach-lpc32xx/clock.c | 2 -
arch/arm/mach-lpc32xx/common.c | 34 +++++++++++++++++++++++++++++
arch/arm/mach-lpc32xx/common.h | 4 +--
arch/arm/mach-lpc32xx/include/mach/board.h | 32 +++++++++++++++++++++++++++
arch/arm/mach-lpc32xx/irq.c | 4 +++
arch/arm/mach-lpc32xx/phy3250.c | 2 +
7 files changed, 101 insertions(+), 3 deletions(-)

--- linux-2.6.orig/arch/arm/mach-lpc32xx/Kconfig
+++ linux-2.6/arch/arm/mach-lpc32xx/Kconfig
@@ -29,5 +29,31 @@ config ARCH_LPC32XX_UART6_SELECT

endmenu

+menu "LPC32XX chip components"
+
+config ARCH_LPC32XX_IRAM_FOR_NET
+ bool "Use IRAM for network buffers"
+ default n
+ help
+ Say Y here to use the LPC internal fast IRAM (i.e. 256KB SRAM) as
+ network buffer. If the total combined required buffer sizes is
+ larger than the size of IRAM, then SDRAM will be used instead.
+
+ This can be enabled safely if the IRAM is not intended for other
+ uses.
+
+config ARCH_LPC32XX_MII_SUPPORT
+ bool "Check to enable MII support or leave disabled for RMII support"
+ default n
+ help
+ Say Y here to enable MII support, or N for RMII support. Regardless of
+ which support is selected, the ethernet interface driver needs to be
+ selected in the device driver networking section.
+
+ The PHY3250 reference board uses RMII, so users of this board should
+ say N.
+
+endmenu
+
endif

--- linux-2.6.orig/arch/arm/mach-lpc32xx/clock.c
+++ linux-2.6/arch/arm/mach-lpc32xx/clock.c
@@ -1134,7 +1134,7 @@ static struct clk_lookup lookups[] = {
_REGISTER_CLOCK(NULL, "i2s1_ck", clk_i2s1)
_REGISTER_CLOCK("ts-lpc32xx", NULL, clk_tsc)
_REGISTER_CLOCK("dev:mmc0", NULL, clk_mmc)
- _REGISTER_CLOCK("lpc-net.0", NULL, clk_net)
+ _REGISTER_CLOCK("lpc-eth.0", NULL, clk_net)
_REGISTER_CLOCK("dev:clcd", NULL, clk_lcd)
_REGISTER_CLOCK("lpc32xx_udc", "ck_usbd", clk_usbd)
_REGISTER_CLOCK("lpc32xx_rtc", NULL, clk_rtc)
--- linux-2.6.orig/arch/arm/mach-lpc32xx/common.c
+++ linux-2.6/arch/arm/mach-lpc32xx/common.c
@@ -186,6 +186,40 @@ struct platform_device lpc32xx_ohci_devi
};

/*
+ * Network Support
+ */
+static struct lpc_net_cfg lpc32xx_netdata = {
+ .phy_irq = -1,
+ .phy_mask = 0xFFFFFFF0,
+};
+
+static struct resource net_resources[] = {
+ [0] = {
+ .start = LPC32XX_ETHERNET_BASE,
+ .end = LPC32XX_ETHERNET_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_LPC32XX_ETHERNET,
+ .end = IRQ_LPC32XX_ETHERNET,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static u64 lpc32xx_mac_dma_mask = 0xffffffffUL;
+struct platform_device lpc32xx_net_device = {
+ .name = "lpc-eth",
+ .id = 0,
+ .dev = {
+ .dma_mask = &lpc32xx_mac_dma_mask,
+ .coherent_dma_mask = 0xffffffffUL,
+ .platform_data = &lpc32xx_netdata,
+ },
+ .num_resources = ARRAY_SIZE(net_resources),
+ .resource = net_resources,
+};
+
+/*
* Returns the unique ID for the device
*/
void lpc32xx_get_uid(u32 devid[4])
--- linux-2.6.orig/arch/arm/mach-lpc32xx/common.h
+++ linux-2.6/arch/arm/mach-lpc32xx/common.h
@@ -19,6 +19,7 @@
#ifndef __LPC32XX_COMMON_H
#define __LPC32XX_COMMON_H

+#include <mach/board.h>
#include <linux/platform_device.h>

/*
@@ -32,6 +33,7 @@ extern struct platform_device lpc32xx_ts
extern struct platform_device lpc32xx_adc_device;
extern struct platform_device lpc32xx_rtc_device;
extern struct platform_device lpc32xx_ohci_device;
+extern struct platform_device lpc32xx_net_device;

/*
* Other arch specific structures and functions
@@ -67,8 +69,6 @@ extern u32 clk_get_pclk_div(void);
*/
extern void lpc32xx_get_uid(u32 devid[4]);

-extern u32 lpc32xx_return_iram_size(void);
-
/*
* Pointers used for sizing and copying suspend function data
*/
--- /dev/null
+++ linux-2.6/arch/arm/mach-lpc32xx/include/mach/board.h
@@ -0,0 +1,32 @@
+/*
+ * arm/arch/mach-lpc32xx/include/mach/board.h
+ *
+ * Author: Kevin Wells <kevin.wells@nxp.com>
+ *
+ * Copyright (C) 2010 NXP Semiconductors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __ASM_ARCH_BOARD_H
+#define __ASM_ARCH_BOARD_H
+
+/*
+ * Network configuration structure
+ */
+struct lpc_net_cfg {
+ int phy_irq; /* PHY IRQ number, or -1 for polling */
+ u32 phy_mask; /* PHY mask value */
+};
+
+extern u32 lpc32xx_return_iram_size(void);
+
+#endif /* __ASM_ARCH_BOARD_H */
--- linux-2.6.orig/arch/arm/mach-lpc32xx/irq.c
+++ linux-2.6/arch/arm/mach-lpc32xx/irq.c
@@ -150,6 +150,10 @@ static const struct lpc32xx_event_info l
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_KEY_BIT,
},
+ [IRQ_LPC32XX_ETHERNET] = {
+ .event_group = &lpc32xx_event_int_regs,
+ .mask = LPC32XX_CLKPWR_INTSRC_MAC_BIT,
+ },
[IRQ_LPC32XX_USB_OTG_ATX] = {
.event_group = &lpc32xx_event_int_regs,
.mask = LPC32XX_CLKPWR_INTSRC_USBATXINT_BIT,
--- linux-2.6.orig/arch/arm/mach-lpc32xx/phy3250.c
+++ linux-2.6/arch/arm/mach-lpc32xx/phy3250.c
@@ -37,6 +37,7 @@

#include <mach/hardware.h>
#include <mach/platform.h>
+#include <mach/board.h>
#include <mach/gpio-lpc32xx.h>
#include "common.h"

@@ -278,6 +279,7 @@ static struct platform_device *phy3250_d
&lpc32xx_gpio_led_device,
&lpc32xx_adc_device,
&lpc32xx_ohci_device,
+ &lpc32xx_net_device,
};

static struct amba_device *amba_devs[] __initdata = {

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