1 files changed, 174 insertions, 0 deletions
diff --git a/arch/h8300/kernel/gpio.c b/arch/h8300/kernel/gpio.c
new file mode 100644
index 0000000..795682b
--- /dev/null
+++ b/arch/h8300/kernel/gpio.c
@@ -0,0 +1,174 @@
+/*
+ *  linux/arch/h8300/kernel/gpio.c
+ *
+ *  Yoshinori Sato <ysato@users.sourceforge.jp>
+ *
+ */
+
+/*
+ * Internal I/O Port Management
+ */
+
+#include <linux/config.h>
+#include <linux/stddef.h>
+#include <linux/proc_fs.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+
+#define _(addr) (volatile unsigned char *)(addr)
+#if defined(CONFIG_H83007) || defined(CONFIG_H83068)
+#include <asm/regs306x.h>
+static volatile unsigned char *ddrs[] = {
+	_(P1DDR),_(P2DDR),_(P3DDR),_(P4DDR),_(P5DDR),_(P6DDR),
+	NULL,    _(P8DDR),_(P9DDR),_(PADDR),_(PBDDR),
+};
+#define MAX_PORT 11
+#endif
+
+ #if defined(CONFIG_H83002) || defined(CONFIG_H8048)
+/* Fix me!! */
+#include <asm/regs306x.h>
+static volatile unsigned char *ddrs[] = {
+	_(P1DDR),_(P2DDR),_(P3DDR),_(P4DDR),_(P5DDR),_(P6DDR),
+	NULL,    _(P8DDR),_(P9DDR),_(PADDR),_(PBDDR),
+};
+#define MAX_PORT 11
+#endif
+
+#if defined(CONFIG_H8S2678)
+#include <asm/regs267x.h>
+static volatile unsigned char *ddrs[] = {
+	_(P1DDR),_(P2DDR),_(P3DDR),NULL    ,_(P5DDR),_(P6DDR),
+	_(P7DDR),_(P8DDR),NULL,    _(PADDR),_(PBDDR),_(PCDDR),
+	_(PDDDR),_(PEDDR),_(PFDDR),_(PGDDR),_(PHDDR),
+	_(PADDR),_(PBDDR),_(PCDDR),_(PDDDR),_(PEDDR),_(PFDDR),
+	_(PGDDR),_(PHDDR)
+};
+#define MAX_PORT 17
+#endif
+#undef _
+ 
+#if !defined(P1DDR)
+#error Unsuppoted CPU Selection
+#endif
+
+static struct {
+	unsigned char used;
+	unsigned char ddr;
+} gpio_regs[MAX_PORT];
+
+extern char *_platform_gpio_table(int length);
+
+int h8300_reserved_gpio(int port, unsigned int bits)
+{
+	unsigned char *used;
+
+	if (port < 0 || port >= MAX_PORT)
+		return -1;
+	used = &(gpio_regs[port].used);
+	if ((*used & bits) != 0)
+		return 0;
+	*used |= bits;
+	return 1;
+}
+
+int h8300_free_gpio(int port, unsigned int bits)
+{
+	unsigned char *used;
+
+	if (port < 0 || port >= MAX_PORT)
+		return -1;
+	used = &(gpio_regs[port].used);
+	if ((*used & bits) != bits)
+		return 0;
+	*used &= (~bits);
+	return 1;
+}
+
+int h8300_set_gpio_dir(int port_bit,int dir)
+{
+	int port = (port_bit >> 8) & 0xff;
+	int bit  = port_bit & 0xff;
+
+	if (ddrs[port] == NULL)
+		return 0;
+	if (gpio_regs[port].used & bit) {
+		if (dir)
+			gpio_regs[port].ddr |= bit;
+		else
+			gpio_regs[port].ddr &= ~bit;
+		*ddrs[port] = gpio_regs[port].ddr;
+		return 1;
+	} else
+		return 0;
+}
+
+int h8300_get_gpio_dir(int port_bit)
+{
+	int port = (port_bit >> 8) & 0xff;
+	int bit  = port_bit & 0xff;
+
+	if (ddrs[port] == NULL)
+		return 0;
+	if (gpio_regs[port].used & bit) {
+		return (gpio_regs[port].ddr & bit) != 0;
+	} else
+		return -1;
+}
+
+#if defined(CONFIG_PROC_FS)
+static char *port_status(int portno)
+{
+	static char result[10];
+	const static char io[2]={'I','O'};
+	char *rp;
+	int c;
+	unsigned char used,ddr;
+	
+	used = gpio_regs[portno].used;
+	ddr  = gpio_regs[portno].ddr;
+	result[8]='\0';
+	rp = result + 7;
+	for (c = 8; c > 0; c--,rp--,used >>= 1, ddr >>= 1)
+		if (used & 0x01)
+			*rp = io[ ddr & 0x01];
+		else	
+			*rp = '-';
+	return result;
+}
+
+static int gpio_proc_read(char *buf, char **start, off_t offset, 
+                          int len, int *unused_i, void *unused_v)
+{
+	int c,outlen;
+	const static char port_name[]="123456789ABCDEFGH";
+	outlen = 0;
+	for (c = 0; c < MAX_PORT; c++) {
+		if (ddrs[c] == NULL)
+			continue ;
+		len = sprintf(buf,"P%c: %s\n",port_name[c],port_status(c));
+		buf += len;
+		outlen += len;
+	}
+	return outlen;
+}
+
+static __init int register_proc(void)
+{
+	struct proc_dir_entry *proc_gpio;
+
+	proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
+	if (proc_gpio) 
+		proc_gpio->read_proc = gpio_proc_read;
+	return proc_gpio != NULL;
+}
+
+__initcall(register_proc);
+#endif
+
+void __init h8300_gpio_init(void)
+{
+	memcpy(gpio_regs,_platform_gpio_table(sizeof(gpio_regs)),sizeof(gpio_regs));
+}