sh: GPIO and pinmux base code

This patch adds gpio code together with the pinmux table parser.
In the future we should optimize this and switch back to gpiolib.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -59,6 +59,9 @@ config GENERIC_HARDIRQS_NO__DO_IRQ
 config GENERIC_IRQ_PROBE
 	def_bool y
 
+config GENERIC_GPIO
+	def_bool n
+
 config GENERIC_CALIBRATE_DELAY
 	bool
 

arch/sh/include/asm/gpio.h

 /*
  *  include/asm-sh/gpio.h
  *
- *  Copyright (C) 2007 Markus Brunner, Mark Jonas
+ * Generic GPIO API and pinmux table support for SuperH.
  *
- *  Addresses for the Pin Function Controller
+ * Copyright (c) 2008 Magnus Damm
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -16,4 +16,92 @@
 #include <cpu/gpio.h>
 #endif
 
+typedef unsigned short pinmux_enum_t;
+typedef unsigned char pinmux_flag_t;
+
+#define PINMUX_TYPE_NONE            0
+#define PINMUX_TYPE_FUNCTION        1
+#define PINMUX_TYPE_GPIO            2
+#define PINMUX_TYPE_OUTPUT          3
+#define PINMUX_TYPE_INPUT           4
+#define PINMUX_TYPE_INPUT_PULLUP    5
+#define PINMUX_TYPE_INPUT_PULLDOWN  6
+
+#define PINMUX_FLAG_TYPE            (0x7)
+#define PINMUX_FLAG_WANT_PULLUP     (1 << 3)
+#define PINMUX_FLAG_WANT_PULLDOWN   (1 << 4)
+
+struct pinmux_gpio {
+	pinmux_enum_t enum_id;
+	pinmux_flag_t flags;
+};
+
+#define PINMUX_GPIO(gpio, data_or_mark) [gpio] = { data_or_mark }
+#define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0
+
+struct pinmux_cfg_reg {
+	unsigned long reg, reg_width, field_width;
+	unsigned long *cnt;
+	pinmux_enum_t *enum_ids;
+};
+
+#define PINMUX_CFG_REG(name, r, r_width, f_width) \
+	.reg = r, .reg_width = r_width, .field_width = f_width,		\
+	.cnt = (unsigned long [r_width / f_width]) {}, \
+	.enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) \
+
+struct pinmux_data_reg {
+	unsigned long reg, reg_width;
+	pinmux_enum_t *enum_ids;
+};
+
+#define PINMUX_DATA_REG(name, r, r_width) \
+	.reg = r, .reg_width = r_width,	\
+	.enum_ids = (pinmux_enum_t [r_width]) \
+
+struct pinmux_range {
+	pinmux_enum_t begin;
+	pinmux_enum_t end;
+};
+
+struct pinmux_info {
+	char *name;
+	pinmux_enum_t reserved_id;
+	struct pinmux_range data;
+	struct pinmux_range input;
+	struct pinmux_range input_pd;
+	struct pinmux_range input_pu;
+	struct pinmux_range output;
+	struct pinmux_range mark;
+	struct pinmux_range function;
+
+	unsigned first_gpio, last_gpio;
+
+	struct pinmux_gpio *gpios;
+	struct pinmux_cfg_reg *cfg_regs;
+	struct pinmux_data_reg *data_regs;
+
+	pinmux_enum_t *gpio_data;
+	unsigned int gpio_data_size;
+
+	unsigned long *gpio_in_use;
+};
+
+int register_pinmux(struct pinmux_info *pip);
+
+int __gpio_request(unsigned gpio);
+static inline int gpio_request(unsigned gpio, const char *label)
+{
+	return __gpio_request(gpio);
+}
+void gpio_free(unsigned gpio);
+int gpio_direction_input(unsigned gpio);
+int gpio_direction_output(unsigned gpio, int value);
+int gpio_get_value(unsigned gpio);
+void gpio_set_value(unsigned gpio, int value);
+static inline int gpio_export(unsigned gpio, bool direction_may_change)
+{
+	return 0;
+}
+
 #endif /* __ASM_SH_GPIO_H */

arch/sh/kernel/Makefile_32

@@ -5,7 +5,7 @@
 extra-y	:= head_32.o init_task.o vmlinux.lds
 
 obj-y	:= debugtraps.o io.o io_generic.o irq.o machvec.o process_32.o \
-	   ptrace_32.o setup.o signal_32.o sys_sh.o sys_sh32.o \
+	   ptrace_32.o setup.o signal_32.o sys_sh.o sys_sh32.o gpio.o \
 	   syscalls_32.o time_32.o topology.o traps.o traps_32.o
 
 obj-y				+= cpu/ timers/

arch/sh/kernel/Makefile_64

 extra-y	:= head_64.o init_task.o vmlinux.lds
 
 obj-y	:= debugtraps.o io.o io_generic.o irq.o machvec.o process_64.o \
-	   ptrace_64.o setup.o signal_64.o sys_sh.o sys_sh64.o \
+	   ptrace_64.o setup.o signal_64.o sys_sh.o sys_sh64.o gpio.o \
 	   syscalls_64.o time_64.o topology.o traps.o traps_64.o
 
 obj-y				+= cpu/ timers/