[PATCH] mfd: SM501 core driver

This driver provides the core functionality of the SM501, which is a
multi-function chip including two framebuffers, video acceleration, USB,
and many other peripheral blocks.

The driver exports a number of entries for the peripheral drivers to use.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Vincent Sanders <vince@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/mfd/Kconfig

@@ -2,6 +2,20 @@
 # Multifunction miscellaneous devices
 #
 
+menu "Multifunction device drivers"
+
+config MFD_SM501
+	tristate "Support for Silicon Motion SM501"
+	 ---help---
+	  This is the core driver for the Silicon Motion SM501 multimedia
+	  companion chip. This device is a multifunction device which may
+	  provide numerous interfaces including USB host controller USB gadget,
+	  Asyncronous Serial ports, Audio functions and a dual display video
+	  interface. The device may be connected by PCI or local bus with
+	  varying functions enabled.
+
+endmenu
+
 menu "Multimedia Capabilities Port drivers"
 	depends on ARCH_SA1100
 

drivers/mfd/Makefile

@@ -2,6 +2,8 @@
 # Makefile for multifunction miscellaneous devices
 #
 
+obj-$(CONFIG_MFD_SM501)		+= sm501.o
+
 obj-$(CONFIG_MCP)		+= mcp-core.o
 obj-$(CONFIG_MCP_SA11X0)	+= mcp-sa11x0.o
 obj-$(CONFIG_MCP_UCB1200)	+= ucb1x00-core.o

include/linux/sm501.h

+/* include/linux/sm501.h
+ *
+ * Copyright (c) 2006 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	Vincent Sanders <vince@simtec.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+extern int sm501_unit_power(struct device *dev,
+			    unsigned int unit, unsigned int to);
+
+extern unsigned long sm501_set_clock(struct device *dev,
+				     int clksrc, unsigned long freq);
+
+extern unsigned long sm501_find_clock(int clksrc, unsigned long req_freq);
+
+/* sm501_misc_control
+ *
+ * Modify the SM501's MISC_CONTROL register
+*/
+
+extern int sm501_misc_control(struct device *dev,
+			      unsigned long set, unsigned long clear);
+
+/* sm501_modify_reg
+ *
+ * Modify a register in the SM501 which may be shared with other
+ * drivers.
+*/
+
+extern unsigned long sm501_modify_reg(struct device *dev,
+				      unsigned long reg,
+				      unsigned long set,
+				      unsigned long clear);
+
+/* sm501_gpio_set
+ *
+ * set the state of the given GPIO line
+*/
+
+extern void sm501_gpio_set(struct device *dev,
+			   unsigned long gpio,
+			   unsigned int to,
+			   unsigned int dir);
+
+/* sm501_gpio_get
+ *
+ * get the state of the given GPIO line
+*/
+
+extern unsigned long sm501_gpio_get(struct device *dev,
+				    unsigned long gpio);
+
+
+/* Platform data definitions */
+
+#define SM501FB_FLAG_USE_INIT_MODE	(1<<0)
+#define SM501FB_FLAG_DISABLE_AT_EXIT	(1<<1)
+#define SM501FB_FLAG_USE_HWCURSOR	(1<<2)
+#define SM501FB_FLAG_USE_HWACCEL	(1<<3)
+
+struct sm501_platdata_fbsub {
+	struct fb_videomode	*def_mode;
+	unsigned int		 def_bpp;
+	unsigned long		 max_mem;
+	unsigned int		 flags;
+};
+
+enum sm501_fb_routing {
+	SM501_FB_OWN		= 0,	/* CRT=>CRT, Panel=>Panel */
+	SM501_FB_CRT_PANEL	= 1,	/* Panel=>CRT, Panel=>Panel */
+};
+
+/* sm501_platdata_fb flag field bit definitions */
+
+#define SM501_FBPD_SWAP_FB_ENDIAN	(1<<0)	/* need to endian swap */
+
+/* sm501_platdata_fb
+ *
+ * configuration data for the framebuffer driver
+*/
+
+struct sm501_platdata_fb {
+	enum sm501_fb_routing		 fb_route;
+	unsigned int			 flags;
+	struct sm501_platdata_fbsub	*fb_crt;
+	struct sm501_platdata_fbsub	*fb_pnl;
+};
+
+/* gpio i2c */
+
+struct sm501_platdata_gpio_i2c {
+	unsigned int		pin_sda;
+	unsigned int		pin_scl;
+};
+
+/* sm501_initdata
+ *
+ * use for initialising values that may not have been setup
+ * before the driver is loaded.
+*/
+
+struct sm501_reg_init {
+	unsigned long		set;
+	unsigned long		mask;
+};
+
+#define SM501_USE_USB_HOST	(1<<0)
+#define SM501_USE_USB_SLAVE	(1<<1)
+#define SM501_USE_SSP0		(1<<2)
+#define SM501_USE_SSP1		(1<<3)
+#define SM501_USE_UART0		(1<<4)
+#define SM501_USE_UART1		(1<<5)
+#define SM501_USE_FBACCEL	(1<<6)
+#define SM501_USE_AC97		(1<<7)
+#define SM501_USE_I2S		(1<<8)
+
+#define SM501_USE_ALL		(0xffffffff)
+
+struct sm501_initdata {
+	struct sm501_reg_init	gpio_low;
+	struct sm501_reg_init	gpio_high;
+	struct sm501_reg_init	misc_timing;
+	struct sm501_reg_init	misc_control;
+
+	unsigned long		devices;
+	unsigned long		mclk;		/* non-zero to modify */
+	unsigned long		m1xclk;		/* non-zero to modify */
+};
+
+/* sm501_init_gpio
+ *
+ * default gpio settings
+*/
+
+struct sm501_init_gpio {
+	struct sm501_reg_init	gpio_data_low;
+	struct sm501_reg_init	gpio_data_high;
+	struct sm501_reg_init	gpio_ddr_low;
+	struct sm501_reg_init	gpio_ddr_high;
+};
+
+/* sm501_platdata
+ *
+ * This is passed with the platform device to allow the board
+ * to control the behaviour of the SM501 driver(s) which attach
+ * to the device.
+ *
+*/
+
+struct sm501_platdata {
+	struct sm501_initdata		*init;
+	struct sm501_init_gpio		*init_gpiop;
+	struct sm501_platdata_fb	*fb;
+
+	struct sm501_platdata_gpio_i2c	*gpio_i2c;
+	unsigned int			 gpio_i2c_nr;
+};