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Diffstat (limited to 'target/linux/pxa/patches-2.6.21/011-proc-gpio.patch')
-rw-r--r--target/linux/pxa/patches-2.6.21/011-proc-gpio.patch318
1 files changed, 0 insertions, 318 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
deleted file mode 100644
index 9085a48aca..0000000000
--- a/target/linux/pxa/patches-2.6.21/011-proc-gpio.patch
+++ /dev/null
@@ -1,318 +0,0 @@
---- a/arch/arm/Kconfig
-+++ b/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"
---- a/drivers/Makefile
-+++ b/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-$(CONFIG_PROC_GPIO) += gpio/
---- /dev/null
-+++ b/drivers/gpio/Kconfig
-@@ -0,0 +1,13 @@
-+config PROC_GPIO
-+ tristate "GPIO /proc interface"
-+ depends on PXA25x || PXA27x
-+ help
-+ This enables an interface under /proc/gpio which allows reading or setting
-+ of any GPIO, and also changing the GPIO alt function mode of any line.
-+
-+config PROC_GPIO_DEBUG
-+ boolean "Enable /proc/gpio debug logging"
-+ depends on PROC_GPIO
-+ help
-+ This enables printk logging of activity done through /proc/gpio
-+
---- /dev/null
-+++ b/drivers/gpio/Makefile
-@@ -0,0 +1,2 @@
-+# Expose GPIOs under /proc
-+obj-$(CONFIG_PROC_GPIO) += proc_gpio.o
---- /dev/null
-+++ b/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");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 03:37:00 +0000