openwrt/target/linux/pxa/patches-2.6.21/018-modular-init-smc91x.patch

Index: linux-2.6.21gum/drivers/net/Kconfig
===================================================================
--- linux-2.6.21gum.orig/drivers/net/Kconfig
+++ linux-2.6.21gum/drivers/net/Kconfig
@@ -836,6 +836,12 @@ config SMC91X
 	  module, say M here and read <file:Documentation/modules.txt> as well
 	  as <file:Documentation/networking/net-modules.txt>.
 
+config SMC91X_GUMSTIX
+	tristate
+	default m if SMC91X=m
+	default y if SMC91X=y
+	depends on SMC91X && ARCH_GUMSTIX
+
 config SMC9194
 	tristate "SMC 9194 support"
 	depends on NET_VENDOR_SMC && (ISA || MAC && BROKEN)
Index: linux-2.6.21gum/drivers/net/Makefile
===================================================================
--- linux-2.6.21gum.orig/drivers/net/Makefile
+++ linux-2.6.21gum/drivers/net/Makefile
@@ -200,6 +200,7 @@ obj-$(CONFIG_PASEMI_MAC) += pasemi_mac.o
 
 obj-$(CONFIG_MACB) += macb.o
 
+obj-$(CONFIG_SMC91X_GUMSTIX) += gumstix-smc91x.o
 obj-$(CONFIG_ARM) += arm/
 obj-$(CONFIG_DEV_APPLETALK) += appletalk/
 obj-$(CONFIG_TR) += tokenring/
Index: linux-2.6.21gum/drivers/net/smc91x.c
===================================================================
--- linux-2.6.21gum.orig/drivers/net/smc91x.c
+++ linux-2.6.21gum/drivers/net/smc91x.c
@@ -2373,6 +2373,10 @@ static struct platform_driver smc_driver
 	},
 };
 
+#ifdef CONFIG_ARCH_GUMSTIX
+extern void gumstix_smc91x_load(void);
+#endif
+
 static int __init smc_init(void)
 {
 #ifdef MODULE
@@ -2384,6 +2388,10 @@ static int __init smc_init(void)
 #endif
 #endif
 
+#ifdef CONFIG_ARCH_GUMSTIX
+	gumstix_smc91x_load();
+#endif
+ 
 	return platform_driver_register(&smc_driver);
 }
 
Index: linux-2.6.21gum/drivers/net/gumstix-smc91x.c
===================================================================
--- /dev/null
+++ linux-2.6.21gum/drivers/net/gumstix-smc91x.c
@@ -0,0 +1,143 @@
+/*
+ *  Gumstix SMC91C111 chip intialization driver
+ *
+ *  Author:     Craig Hughes
+ *  Created:    December 9, 2004
+ *  Copyright:  (C) 2004 Craig Hughes
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#include <asm/hardware.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/delay.h>
+
+#include <asm/arch/gumstix.h>
+
+#define SMC_DEBUG               0
+#include <asm/io.h>
+#include "smc91x.h"
+
+static struct resource gumstix_smc91x0_resources[] = {
+	[0] = {
+		.name	= "smc91x-regs",
+		.start  = PXA_CS1_PHYS + 0x00000300,
+		.end    = PXA_CS1_PHYS + 0x000fffff,
+		.flags  = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start  = GUMSTIX_ETH0_IRQ,
+		.end    = GUMSTIX_ETH0_IRQ,
+		.flags  = IORESOURCE_IRQ,
+	},
+};
+
+static struct resource gumstix_smc91x1_resources[] = {
+	[0] = {
+		.name	= "smc91x-regs",
+		.start	= PXA_CS2_PHYS + 0x00000300,
+		.end	= PXA_CS2_PHYS + 0x000fffff,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= GUMSTIX_ETH1_IRQ,
+		.end	= GUMSTIX_ETH1_IRQ,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device gumstix_smc91x0_device = {
+	.name           = "smc91x",
+	.id             = 0,
+	.num_resources  = ARRAY_SIZE(gumstix_smc91x0_resources),
+	.resource       = gumstix_smc91x0_resources,
+};
+
+static struct platform_device gumstix_smc91x1_device = {
+	.name           = "smc91x",
+	.id             = 1,
+	.num_resources  = ARRAY_SIZE(gumstix_smc91x1_resources),
+	.resource       = gumstix_smc91x1_resources,
+};
+
+static struct platform_device *smc91x_devices[] = {
+	&gumstix_smc91x0_device,
+	&gumstix_smc91x1_device,
+};
+
+/* First we're going to test if there's a 2nd SMC91C111, and if not, then we'll free up those resources and the GPIO lines
+ * that it would otherwise use.  We have no choice but to probe by doing:
+ * Set nCS2 to CS2 mode
+ * Set the reset line to GPIO out mode, and pull it high, then drop it low (to trigger reset)
+ * Read from the memory space to check for the sentinel sequence identifying a likely SMC91C111 device
+ */
+int __init gumstix_smc91x_init(void)
+{
+	unsigned int val, num_devices=ARRAY_SIZE(smc91x_devices);
+	void *ioaddr;
+
+	/* Set up nPWE */
+	pxa_gpio_mode(GPIO49_nPWE_MD);
+
+	pxa_gpio_mode(GPIO78_nCS_2_MD);
+	// If either if statement fails, then we'll drop out and turn_off_eth1,
+	// if both succeed, then we'll skip that and just proceed with 2 cards
+	if(request_mem_region(gumstix_smc91x1_resources[0].start, SMC_IO_EXTENT, "smc91x probe"))
+	{
+		ioaddr = ioremap(gumstix_smc91x1_resources[0].start, SMC_IO_EXTENT);
+		val = ioread16(ioaddr + BANK_SELECT);
+		iounmap(ioaddr);
+		release_mem_region(gumstix_smc91x1_resources[0].start, SMC_IO_EXTENT);
+		if ((val & 0xFF00) == 0x3300) {
+			goto proceed;
+		}
+	}
+
+turn_off_eth1:
+	// This is apparently not an SMC91C111
+	// So, let's decrement the number of devices to request, and reset the GPIO lines to GPIO IN mode
+	num_devices--;
+	smc91x_devices[1] = NULL;
+	pxa_gpio_mode(78 | GPIO_IN);
+	
+proceed:
+	pxa_gpio_mode(GPIO15_nCS_1_MD);
+
+	if(smc91x_devices[1]) pxa_gpio_mode(GPIO_GUMSTIX_ETH1_RST_MD);
+	pxa_gpio_mode(GPIO_GUMSTIX_ETH0_RST_MD);
+	if(smc91x_devices[1]) GPSR(GPIO_GUMSTIX_ETH1_RST) = GPIO_bit(GPIO_GUMSTIX_ETH1_RST);
+	GPSR(GPIO_GUMSTIX_ETH0_RST) = GPIO_bit(GPIO_GUMSTIX_ETH0_RST);
+	udelay(1); // Hold RESET for at least 100ns
+	if(smc91x_devices[1]) GPCR(GPIO_GUMSTIX_ETH1_RST) = GPIO_bit(GPIO_GUMSTIX_ETH1_RST);
+	GPCR(GPIO_GUMSTIX_ETH0_RST) = GPIO_bit(GPIO_GUMSTIX_ETH0_RST);
+	msleep(50);
+
+	return platform_add_devices(smc91x_devices, num_devices);
+}
+
+void __exit gumstix_smc91x_exit(void)
+{
+	if(smc91x_devices[1] != NULL) platform_device_unregister(&gumstix_smc91x1_device);
+	platform_device_unregister(&gumstix_smc91x0_device);
+}
+
+void gumstix_smc91x_load(void) {}
+EXPORT_SYMBOL(gumstix_smc91x_load);
+
+module_init(gumstix_smc91x_init);
+module_exit(gumstix_smc91x_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Craig Hughes <craig@gumstix.com>");
+MODULE_DESCRIPTION("Gumstix board SMC91C111 chip initialization driver");
+MODULE_VERSION("1:0.1");