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Date: Mon, 27 Sep 2010 11:05:49 -0500
From: Tim Nordell <tim.nordell@...icpd.com>
To: linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Tim Nordell <tim.nordell@...icpd.com>
Subject: [PATCH v4 3/4] ARM: OMAP3: Add generic smsc911x support when connected to GPMC
Introduce of a generic way to setup smsc911x based Ethernet
controller connected to GPMC similar to gpmc-smc91x but without
timing setup.
Signed-off-by: Tim Nordell <tim.nordell@...icpd.com>
---
arch/arm/mach-omap2/Makefile | 3 +
arch/arm/mach-omap2/gpmc-smsc911x.c | 113 +++++++++++++++++++++++
arch/arm/plat-omap/include/plat/gpmc-smsc911x.h | 35 +++++++
3 files changed, 151 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/gpmc-smsc911x.c
create mode 100644 arch/arm/plat-omap/include/plat/gpmc-smsc911x.h
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 9feadd8..f7ec388 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -178,3 +178,6 @@ obj-y += $(nand-m) $(nand-y)
smc91x-$(CONFIG_SMC91X) := gpmc-smc91x.o
obj-y += $(smc91x-m) $(smc91x-y)
+
+smsc911x-$(CONFIG_SMSC911X) := gpmc-smsc911x.o
+obj-y += $(smsc911x-m) $(smsc911x-y)
diff --git a/arch/arm/mach-omap2/gpmc-smsc911x.c b/arch/arm/mach-omap2/gpmc-smsc911x.c
new file mode 100644
index 0000000..703f150
--- /dev/null
+++ b/arch/arm/mach-omap2/gpmc-smsc911x.c
@@ -0,0 +1,113 @@
+/*
+ * linux/arch/arm/mach-omap2/gpmc-smsc911x.c
+ *
+ * Copyright (C) 2009 Li-Pro.Net
+ * Stephan Linz <linz@...pro.net>
+ *
+ * Modified from linux/arch/arm/mach-omap2/gpmc-smc91x.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/smsc911x.h>
+
+#include <plat/board.h>
+#include <plat/gpmc.h>
+#include <plat/gpmc-smsc911x.h>
+
+static struct omap_smsc911x_platform_data *gpmc_cfg;
+
+static struct resource gpmc_smsc911x_resources[] = {
+ [0] = {
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct smsc911x_platform_config gpmc_smsc911x_config = {
+ .phy_interface = PHY_INTERFACE_MODE_MII,
+ .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
+ .irq_type = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
+ .flags = SMSC911X_USE_16BIT,
+};
+
+static struct platform_device gpmc_smsc911x_device = {
+ .name = "smsc911x",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(gpmc_smsc911x_resources),
+ .resource = gpmc_smsc911x_resources,
+ .dev = {
+ .platform_data = &gpmc_smsc911x_config,
+ },
+};
+
+/*
+ * Initialize smsc911x device connected to the GPMC. Note that we
+ * assume that pin multiplexing is done in the board-*.c file,
+ * or in the bootloader.
+ */
+void __init gpmc_smsc911x_init(struct omap_smsc911x_platform_data *board_data)
+{
+ unsigned long cs_mem_base;
+ int ret;
+
+ gpmc_cfg = board_data;
+
+ if (gpmc_cs_request(gpmc_cfg->cs, SZ_16M, &cs_mem_base) < 0) {
+ printk(KERN_ERR "Failed to request GPMC mem for smsc911x\n");
+ return;
+ }
+
+ gpmc_smsc911x_resources[0].start = cs_mem_base + 0x0;
+ gpmc_smsc911x_resources[0].end = cs_mem_base + 0xff;
+
+ if (gpio_request(gpmc_cfg->gpio_irq, "smsc911x irq") < 0) {
+ printk(KERN_ERR "Failed to request GPIO%d for smsc911x IRQ\n",
+ gpmc_cfg->gpio_irq);
+ goto free1;
+ }
+
+ gpio_direction_input(gpmc_cfg->gpio_irq);
+ gpmc_smsc911x_resources[1].start = gpio_to_irq(gpmc_cfg->gpio_irq);
+ gpmc_smsc911x_resources[1].flags |=
+ (gpmc_cfg->flags & IRQF_TRIGGER_MASK);
+
+ if (gpio_is_valid(gpmc_cfg->gpio_reset)) {
+ ret = gpio_request(gpmc_cfg->gpio_reset, "smsc911x reset");
+ if (ret) {
+ printk(KERN_ERR "Failed to request GPIO%d for smsc911x reset\n",
+ gpmc_cfg->gpio_reset);
+ goto free2;
+ }
+
+ gpio_direction_output(gpmc_cfg->gpio_reset, 1);
+ gpio_set_value(gpmc_cfg->gpio_reset, 0);
+ msleep(100);
+ gpio_set_value(gpmc_cfg->gpio_reset, 1);
+ }
+
+ if (platform_device_register(&gpmc_smsc911x_device) < 0) {
+ printk(KERN_ERR "Unable to register smsc911x device\n");
+ gpio_free(gpmc_cfg->gpio_reset);
+ goto free2;
+ }
+
+ return;
+
+free2:
+ gpio_free(gpmc_cfg->gpio_irq);
+free1:
+ gpmc_cs_free(gpmc_cfg->cs);
+
+ printk(KERN_ERR "Could not initialize smsc911x\n");
+}
diff --git a/arch/arm/plat-omap/include/plat/gpmc-smsc911x.h b/arch/arm/plat-omap/include/plat/gpmc-smsc911x.h
new file mode 100644
index 0000000..e5f3a48
--- /dev/null
+++ b/arch/arm/plat-omap/include/plat/gpmc-smsc911x.h
@@ -0,0 +1,35 @@
+/*
+ * arch/arm/plat-omap/include/mach/gpmc-smsc911x.h
+ *
+ * Copyright (C) 2009 Li-Pro.Net
+ * Stephan Linz <linz@...pro.net>
+ *
+ * Modified from arch/arm/plat-omap/include/mach/gpmc-smc91x.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_ARCH_OMAP_GPMC_SMSC911X_H__
+
+struct omap_smsc911x_platform_data {
+ int cs;
+ int gpio_irq;
+ int gpio_reset;
+ u32 flags;
+};
+
+#if defined(CONFIG_SMSC911X) || \
+ defined(CONFIG_SMSC911X_MODULE)
+
+extern void gpmc_smsc911x_init(struct omap_smsc911x_platform_data *d);
+
+#else
+
+static inline void gpmc_smsc911x_init(struct omap_smsc911x_platform_data *d)
+{
+}
+
+#endif
+#endif
--
1.7.1
--
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