diff options
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.patch | 318 |
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 9085a48..0000000 --- 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"); |