incomplete Gumstix support

SVN-Revision: 10955

1 files changed, 328 insertions, 0 deletions

diff --git a/target/linux/pxa/patches-2.6.21/011-proc-gpio.patch b/target/linux/pxa/patches-2.6.21/011-proc-gpio.patch
new file mode 100644
index 0000000000..371a2142ae
--- /dev/null
+++ b/target/linux/pxa/patches-2.6.21/011-proc-gpio.patch
@@ -0,0 +1,328 @@
+Index: linux-2.6.21gum/arch/arm/Kconfig
+===================================================================
+--- linux-2.6.21gum.orig/arch/arm/Kconfig
++++ linux-2.6.21gum/arch/arm/Kconfig
+@@ -505,6 +505,8 @@ config PCI_HOST_VIA82C505
+ 	depends on PCI && ARCH_SHARK
+ 	default y
+ 
++source "drivers/gpio/Kconfig"
++
+ source "drivers/pci/Kconfig"
+ 
+ source "drivers/pcmcia/Kconfig"
+Index: linux-2.6.21gum/drivers/Makefile
+===================================================================
+--- linux-2.6.21gum.orig/drivers/Makefile
++++ linux-2.6.21gum/drivers/Makefile
+@@ -81,3 +81,4 @@ obj-$(CONFIG_GENERIC_TIME)	+= clocksourc
+ obj-$(CONFIG_DMA_ENGINE)	+= dma/
+ obj-$(CONFIG_HID)		+= hid/
+ obj-$(CONFIG_PPC_PS3)		+= ps3/
++obj-$(CONFIG_PROC_GPIO)		+= gpio/
+Index: linux-2.6.21gum/drivers/gpio/Kconfig
+===================================================================
+--- /dev/null
++++ linux-2.6.21gum/drivers/gpio/Kconfig
+@@ -0,0 +1,12 @@
++config PROC_GPIO
++	tristate "GPIO /proc interface"
++	depends on PXA25x || PXA27x
++	help
++	  This enables an interface under /proc/gpio which allows reading or setting
++	  of any GPIO, and also changing the GPIO alt function mode of any line.
++
++config PROC_GPIO_DEBUG
++	boolean "Enable /proc/gpio debug logging"
++	depends on PROC_GPIO
++	help
++	  This enables printk logging of activity done through /proc/gpio
+Index: linux-2.6.21gum/drivers/gpio/Makefile
+===================================================================
+--- /dev/null
++++ linux-2.6.21gum/drivers/gpio/Makefile
+@@ -0,0 +1,3 @@
++# Expose GPIOs under /proc
++obj-$(CONFIG_PROC_GPIO)			+= proc_gpio.o
++
+Index: linux-2.6.21gum/drivers/gpio/proc_gpio.c
+===================================================================
+--- /dev/null
++++ linux-2.6.21gum/drivers/gpio/proc_gpio.c
+@@ -0,0 +1,276 @@
++/*
++ *
++ *  PXA25x GPIOs exposed under /proc for reading and writing
++ *  They will show up under /proc/gpio/NN
++ *
++ *  Based on patch 1773/1 in the arm kernel patch repository at arm.linux.co.uk
++ *
++ */
++
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/proc_fs.h>
++#include <linux/string.h>
++#include <linux/ctype.h>
++
++#include <asm/hardware.h>
++#include <asm/arch/pxa-regs.h>
++#include <asm/uaccess.h>
++
++static struct proc_dir_entry *proc_gpio_parent;
++static struct proc_dir_entry *proc_gpios[PXA_LAST_GPIO + 1];
++
++typedef struct
++{
++	int	gpio;
++	char    name[32];
++} gpio_summary_type;
++
++static gpio_summary_type gpio_summaries[PXA_LAST_GPIO + 1];
++
++static int proc_gpio_write(struct file *file, const char __user *buf,
++                           unsigned long count, void *data)
++{
++	char *cur, lbuf[count + 1];
++	gpio_summary_type *summary = data;
++	u32 altfn, direction, setclear, gafr;
++
++	if (!capable(CAP_SYS_ADMIN))
++		return -EACCES;
++
++	memset(lbuf, 0, count + 1);
++
++	if (copy_from_user(lbuf, buf, count))
++		return -EFAULT;
++
++	cur = lbuf;
++
++	// Initialize to current state
++	altfn = ((GAFR(summary->gpio) >> ((summary->gpio & 0x0f) << 0x01)) & 0x03);
++	direction = GPDR(summary->gpio) & GPIO_bit(summary->gpio);
++	setclear = GPLR(summary->gpio) & GPIO_bit(summary->gpio);
++	while(1)
++	{
++		// We accept options: {GPIO|AF1|AF2|AF3}, {set|clear}, {in|out}
++		// Anything else is an error
++		while(cur[0] && (isspace(cur[0]) || ispunct(cur[0]))) cur = &(cur[1]);
++
++		if('\0' == cur[0]) break;
++
++		// Ok, so now we're pointing at the start of something
++		switch(cur[0])
++		{
++			case 'G':
++				// Check that next is "PIO" -- '\0' will cause safe short-circuit if end of buf
++				if(!(cur[1] == 'P' && cur[2] == 'I' && cur[3] == 'O')) goto parse_error;
++				// Ok, so set this GPIO to GPIO (non-ALT) function
++				altfn = 0;
++				cur = &(cur[4]);
++				break;
++			case 'A':
++				if(!(cur[1] == 'F' && cur[2] >= '1' && cur[2] <= '3')) goto parse_error;
++				altfn = cur[2] - '0';
++				cur = &(cur[3]);
++				break;
++			case 's':
++				if(!(cur[1] == 'e' && cur[2] == 't')) goto parse_error;
++				setclear = 1;
++				cur = &(cur[3]);
++				break;
++			case 'c':
++				if(!(cur[1] == 'l' && cur[2] == 'e' && cur[3] == 'a' && cur[4] == 'r')) goto parse_error;
++				setclear = 0;
++				cur = &(cur[5]);
++				break;
++			case 'i':
++				if(!(cur[1] == 'n')) goto parse_error;
++				direction = 0;
++				cur = &(cur[2]);
++				break;
++			case 'o':
++				if(!(cur[1] == 'u' && cur[2] == 't')) goto parse_error;
++				direction = 1;
++				cur = &(cur[3]);
++				break;
++			default: goto parse_error;
++		}
++	}
++	// Ok, now set gpio mode and value
++	if(direction)
++		GPDR(summary->gpio) |= GPIO_bit(summary->gpio);
++	else
++		GPDR(summary->gpio) &= ~GPIO_bit(summary->gpio);
++
++	gafr = GAFR(summary->gpio) & ~(0x3 << (((summary->gpio) & 0xf)*2));
++	GAFR(summary->gpio) = gafr |  (altfn  << (((summary->gpio) & 0xf)*2));
++
++	if(direction && !altfn)
++	{
++		if(setclear) GPSR(summary->gpio) = GPIO_bit(summary->gpio);
++		else GPCR(summary->gpio) = GPIO_bit(summary->gpio);
++	}
++
++#ifdef CONFIG_PROC_GPIO_DEBUG
++	printk(KERN_INFO "Set (%s,%s,%s) via /proc/gpio/%s\n",altfn ? (altfn == 1 ? "AF1" : (altfn == 2 ? "AF2" : "AF3")) : "GPIO",
++				direction ? "out" : "in",
++				setclear ? "set" : "clear",
++				summary->name);
++#endif
++
++	return count;
++
++parse_error:
++	printk(KERN_CRIT "Parse error: Expect \"[GPIO|AF1|AF2|AF3]|[set|clear]|[in|out] ...\"\n");
++	return -EINVAL;
++}
++
++static int proc_gpio_read(char *page, char **start, off_t off,
++			int count, int *eof, void *data)
++{
++	char *p = page;
++	gpio_summary_type *summary = data;
++	int len, i, af;
++	i = summary->gpio;
++
++	p += sprintf(p, "%d\t%s\t%s\t%s\n", i,
++			(af = ((GAFR(i) >> ((i & 0x0f) << 0x01)) & 0x03)) ? (af == 1 ? "AF1" : (af == 2 ? "AF2" : "AF3")) : "GPIO",
++			(GPDR(i) & GPIO_bit(i)) ? "out" : "in",
++			(GPLR(i) & GPIO_bit(i)) ? "set" : "clear");
++
++	len = (p - page) - off;
++
++	if(len < 0)
++	{
++		len = 0;
++	}
++
++	*eof = (len <= count) ? 1 : 0;
++	*start = page + off;
++
++	return len;
++}
++
++
++#ifdef CONFIG_PXA25x
++static const char const *GAFR_DESC[] = { "GAFR0_L", "GAFR0_U", "GAFR1_L", "GAFR1_U", "GAFR2_L", "GAFR2_U" };
++#elif defined(CONFIG_PXA27x)
++static const char const *GAFR_DESC[] = { "GAFR0_L", "GAFR0_U", "GAFR1_L", "GAFR1_U", "GAFR2_L", "GAFR2_U", "GAFR3_L", "GAFR3_U" };
++#endif
++
++static int proc_gafr_read(char *page, char **start, off_t off,
++			int count, int *eof, void *data)
++{
++	char *p = page;
++	int i, len;
++
++	for(i=0; i<ARRAY_SIZE(GAFR_DESC); i++)
++	{
++		p += sprintf(p, "%s: %08x\n", GAFR_DESC[i], GAFR(i*16));
++	}
++
++	len = (p - page) - off;
++
++	if(len < 0)
++	{
++		len = 0;
++	}
++
++	*eof = (len <= count) ? 1 : 0;
++	*start = page + off;
++
++	return len;
++}
++
++static int proc_gpdr_read(char *page, char **start, off_t off,
++			int count, int *eof, void *data)
++{
++	char *p = page;
++	int i, len;
++
++	for(i=0; i<=2; i++)
++	{
++		p += sprintf(p, "GPDR%d: %08x\n", i, GPDR(i * 32));
++	}
++
++	len = (p - page) - off;
++
++	if(len < 0)
++	{
++		len = 0;
++	}
++
++	*eof = (len <= count) ? 1 : 0;
++	*start = page + off;
++
++	return len;
++}
++
++static int proc_gplr_read(char *page, char **start, off_t off,
++			int count, int *eof, void *data)
++{
++	char *p = page;
++	int i, len;
++
++	for(i=0; i<=2; i++)
++	{
++		p += sprintf(p, "GPLR%d: %08x\n", i, GPLR(i * 32));
++	}
++
++	len = (p - page) - off;
++
++	if(len < 0)
++	{
++		len = 0;
++	}
++
++	*eof = (len <= count) ? 1 : 0;
++	*start = page + off;
++
++	return len;
++}
++
++static int __init gpio_init(void)
++{
++	int i;
++
++	proc_gpio_parent = create_proc_entry("gpio", S_IFDIR | S_IRUGO | S_IXUGO, NULL);
++	if(!proc_gpio_parent) return 0;
++
++	for(i=0; i < (PXA_LAST_GPIO+1); i++)
++	{
++		gpio_summaries[i].gpio = i;
++		sprintf(gpio_summaries[i].name, "GPIO%d", i);
++		proc_gpios[i] = create_proc_entry(gpio_summaries[i].name, 0644, proc_gpio_parent);
++		if(proc_gpios[i])
++		{
++			proc_gpios[i]->data = &gpio_summaries[i];
++			proc_gpios[i]->read_proc = proc_gpio_read;
++			proc_gpios[i]->write_proc = proc_gpio_write;
++		}
++	}
++
++	create_proc_read_entry("GAFR", 0444, proc_gpio_parent, proc_gafr_read, NULL);
++	create_proc_read_entry("GPDR", 0444, proc_gpio_parent, proc_gpdr_read, NULL);
++	create_proc_read_entry("GPLR", 0444, proc_gpio_parent, proc_gplr_read, NULL);
++
++	return 0;
++}
++
++static void gpio_exit(void)
++{
++	int i;
++
++	remove_proc_entry("GAFR", proc_gpio_parent);
++	remove_proc_entry("GPDR", proc_gpio_parent);
++	remove_proc_entry("GPLR", proc_gpio_parent);
++
++	for(i=0; i < (PXA_LAST_GPIO+1); i++)
++	{
++		if(proc_gpios[i]) remove_proc_entry(gpio_summaries[i].name, proc_gpio_parent);
++	}
++	if(proc_gpio_parent) remove_proc_entry("gpio", NULL);
++}
++
++module_init(gpio_init);
++module_exit(gpio_exit);
++MODULE_LICENSE("GPL");