[MFD] Add code UCB1200/UCB1300 device support

Add the core device support code for the Philips UCB1200 and
UCB1300 devices.  Also includes the following from Pavel:

This fixes u32 vs. pm_message_t confusion and uses cleaner
try_to_freeze() [fixing compilation as a side-effect on newer
kernels.]

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 256 insertions, 0 deletions

diff --git a/drivers/mfd/ucb1x00.h b/drivers/mfd/ucb1x00.h
new file mode 100644
index 000000000000..6b632644f59a
--- /dev/null
+++ b/drivers/mfd/ucb1x00.h
@@ -0,0 +1,256 @@
+/*
+ *  linux/drivers/mfd/ucb1x00.h
+ *
+ *  Copyright (C) 2001 Russell King, All Rights Reserved.
+ *
+ * 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.
+ */
+#ifndef UCB1200_H
+#define UCB1200_H
+
+#define UCB_IO_DATA	0x00
+#define UCB_IO_DIR	0x01
+
+#define UCB_IO_0		(1 << 0)
+#define UCB_IO_1		(1 << 1)
+#define UCB_IO_2		(1 << 2)
+#define UCB_IO_3		(1 << 3)
+#define UCB_IO_4		(1 << 4)
+#define UCB_IO_5		(1 << 5)
+#define UCB_IO_6		(1 << 6)
+#define UCB_IO_7		(1 << 7)
+#define UCB_IO_8		(1 << 8)
+#define UCB_IO_9		(1 << 9)
+
+#define UCB_IE_RIS	0x02
+#define UCB_IE_FAL	0x03
+#define UCB_IE_STATUS	0x04
+#define UCB_IE_CLEAR	0x04
+#define UCB_IE_ADC		(1 << 11)
+#define UCB_IE_TSPX		(1 << 12)
+#define UCB_IE_TSMX		(1 << 13)
+#define UCB_IE_TCLIP		(1 << 14)
+#define UCB_IE_ACLIP		(1 << 15)
+
+#define UCB_IRQ_TSPX		12
+
+#define UCB_TC_A	0x05
+#define UCB_TC_A_LOOP		(1 << 7)	/* UCB1200 */
+#define UCB_TC_A_AMPL		(1 << 7)	/* UCB1300 */
+
+#define UCB_TC_B	0x06
+#define UCB_TC_B_VOICE_ENA	(1 << 3)
+#define UCB_TC_B_CLIP		(1 << 4)
+#define UCB_TC_B_ATT		(1 << 6)
+#define UCB_TC_B_SIDE_ENA	(1 << 11)
+#define UCB_TC_B_MUTE		(1 << 13)
+#define UCB_TC_B_IN_ENA		(1 << 14)
+#define UCB_TC_B_OUT_ENA	(1 << 15)
+
+#define UCB_AC_A	0x07
+#define UCB_AC_B	0x08
+#define UCB_AC_B_LOOP		(1 << 8)
+#define UCB_AC_B_MUTE		(1 << 13)
+#define UCB_AC_B_IN_ENA		(1 << 14)
+#define UCB_AC_B_OUT_ENA	(1 << 15)
+
+#define UCB_TS_CR	0x09
+#define UCB_TS_CR_TSMX_POW	(1 << 0)
+#define UCB_TS_CR_TSPX_POW	(1 << 1)
+#define UCB_TS_CR_TSMY_POW	(1 << 2)
+#define UCB_TS_CR_TSPY_POW	(1 << 3)
+#define UCB_TS_CR_TSMX_GND	(1 << 4)
+#define UCB_TS_CR_TSPX_GND	(1 << 5)
+#define UCB_TS_CR_TSMY_GND	(1 << 6)
+#define UCB_TS_CR_TSPY_GND	(1 << 7)
+#define UCB_TS_CR_MODE_INT	(0 << 8)
+#define UCB_TS_CR_MODE_PRES	(1 << 8)
+#define UCB_TS_CR_MODE_POS	(2 << 8)
+#define UCB_TS_CR_BIAS_ENA	(1 << 11)
+#define UCB_TS_CR_TSPX_LOW	(1 << 12)
+#define UCB_TS_CR_TSMX_LOW	(1 << 13)
+
+#define UCB_ADC_CR	0x0a
+#define UCB_ADC_SYNC_ENA	(1 << 0)
+#define UCB_ADC_VREFBYP_CON	(1 << 1)
+#define UCB_ADC_INP_TSPX	(0 << 2)
+#define UCB_ADC_INP_TSMX	(1 << 2)
+#define UCB_ADC_INP_TSPY	(2 << 2)
+#define UCB_ADC_INP_TSMY	(3 << 2)
+#define UCB_ADC_INP_AD0		(4 << 2)
+#define UCB_ADC_INP_AD1		(5 << 2)
+#define UCB_ADC_INP_AD2		(6 << 2)
+#define UCB_ADC_INP_AD3		(7 << 2)
+#define UCB_ADC_EXT_REF		(1 << 5)
+#define UCB_ADC_START		(1 << 7)
+#define UCB_ADC_ENA		(1 << 15)
+
+#define UCB_ADC_DATA	0x0b
+#define UCB_ADC_DAT_VAL		(1 << 15)
+#define UCB_ADC_DAT(x)		(((x) & 0x7fe0) >> 5)
+
+#define UCB_ID		0x0c
+#define UCB_ID_1200		0x1004
+#define UCB_ID_1300		0x1005
+
+#define UCB_MODE	0x0d
+#define UCB_MODE_DYN_VFLAG_ENA	(1 << 12)
+#define UCB_MODE_AUD_OFF_CAN	(1 << 13)
+
+#include "mcp.h"
+
+struct ucb1x00_irq {
+	void *devid;
+	void (*fn)(int, void *);
+};
+
+extern struct class ucb1x00_class;
+
+struct ucb1x00 {
+	spinlock_t		lock;
+	struct mcp		*mcp;
+	unsigned int		irq;
+	struct semaphore	adc_sem;
+	spinlock_t		io_lock;
+	u16			id;
+	u16			io_dir;
+	u16			io_out;
+	u16			adc_cr;
+	u16			irq_fal_enbl;
+	u16			irq_ris_enbl;
+	struct ucb1x00_irq	irq_handler[16];
+	struct class_device	cdev;
+	struct list_head	node;
+	struct list_head	devs;
+};
+
+struct ucb1x00_driver;
+
+struct ucb1x00_dev {
+	struct list_head	dev_node;
+	struct list_head	drv_node;
+	struct ucb1x00		*ucb;
+	struct ucb1x00_driver	*drv;
+	void			*priv;
+};
+
+struct ucb1x00_driver {
+	struct list_head	node;
+	struct list_head	devs;
+	int	(*add)(struct ucb1x00_dev *dev);
+	void	(*remove)(struct ucb1x00_dev *dev);
+	int	(*suspend)(struct ucb1x00_dev *dev, pm_message_t state);
+	int	(*resume)(struct ucb1x00_dev *dev);
+};
+
+#define classdev_to_ucb1x00(cd)	container_of(cd, struct ucb1x00, cdev)
+
+int ucb1x00_register_driver(struct ucb1x00_driver *);
+void ucb1x00_unregister_driver(struct ucb1x00_driver *);
+
+/**
+ *	ucb1x00_clkrate - return the UCB1x00 SIB clock rate
+ *	@ucb: UCB1x00 structure describing chip
+ *
+ *	Return the SIB clock rate in Hz.
+ */
+static inline unsigned int ucb1x00_clkrate(struct ucb1x00 *ucb)
+{
+	return mcp_get_sclk_rate(ucb->mcp);
+}
+
+/**
+ *	ucb1x00_enable - enable the UCB1x00 SIB clock
+ *	@ucb: UCB1x00 structure describing chip
+ *
+ *	Enable the SIB clock.  This can be called multiple times.
+ */
+static inline void ucb1x00_enable(struct ucb1x00 *ucb)
+{
+	mcp_enable(ucb->mcp);
+}
+
+/**
+ *	ucb1x00_disable - disable the UCB1x00 SIB clock
+ *	@ucb: UCB1x00 structure describing chip
+ *
+ *	Disable the SIB clock.  The SIB clock will only be disabled
+ *	when the number of ucb1x00_enable calls match the number of
+ *	ucb1x00_disable calls.
+ */
+static inline void ucb1x00_disable(struct ucb1x00 *ucb)
+{
+	mcp_disable(ucb->mcp);
+}
+
+/**
+ *	ucb1x00_reg_write - write a UCB1x00 register
+ *	@ucb: UCB1x00 structure describing chip
+ *	@reg: UCB1x00 4-bit register index to write
+ *	@val: UCB1x00 16-bit value to write
+ *
+ *	Write the UCB1x00 register @reg with value @val.  The SIB
+ *	clock must be running for this function to return.
+ */
+static inline void ucb1x00_reg_write(struct ucb1x00 *ucb, unsigned int reg, unsigned int val)
+{
+	mcp_reg_write(ucb->mcp, reg, val);
+}
+
+/**
+ *	ucb1x00_reg_read - read a UCB1x00 register
+ *	@ucb: UCB1x00 structure describing chip
+ *	@reg: UCB1x00 4-bit register index to write
+ *
+ *	Read the UCB1x00 register @reg and return its value.  The SIB
+ *	clock must be running for this function to return.
+ */
+static inline unsigned int ucb1x00_reg_read(struct ucb1x00 *ucb, unsigned int reg)
+{
+	return mcp_reg_read(ucb->mcp, reg);
+}
+/**
+ *	ucb1x00_set_audio_divisor - 
+ *	@ucb: UCB1x00 structure describing chip
+ *	@div: SIB clock divisor
+ */
+static inline void ucb1x00_set_audio_divisor(struct ucb1x00 *ucb, unsigned int div)
+{
+	mcp_set_audio_divisor(ucb->mcp, div);
+}
+
+/**
+ *	ucb1x00_set_telecom_divisor -
+ *	@ucb: UCB1x00 structure describing chip
+ *	@div: SIB clock divisor
+ */
+static inline void ucb1x00_set_telecom_divisor(struct ucb1x00 *ucb, unsigned int div)
+{
+	mcp_set_telecom_divisor(ucb->mcp, div);
+}
+
+void ucb1x00_io_set_dir(struct ucb1x00 *ucb, unsigned int, unsigned int);
+void ucb1x00_io_write(struct ucb1x00 *ucb, unsigned int, unsigned int);
+unsigned int ucb1x00_io_read(struct ucb1x00 *ucb);
+
+#define UCB_NOSYNC	(0)
+#define UCB_SYNC	(1)
+
+unsigned int ucb1x00_adc_read(struct ucb1x00 *ucb, int adc_channel, int sync);
+void ucb1x00_adc_enable(struct ucb1x00 *ucb);
+void ucb1x00_adc_disable(struct ucb1x00 *ucb);
+
+/*
+ * Which edges of the IRQ do you want to control today?
+ */
+#define UCB_RISING	(1 << 0)
+#define UCB_FALLING	(1 << 1)
+
+int ucb1x00_hook_irq(struct ucb1x00 *ucb, unsigned int idx, void (*fn)(int, void *), void *devid);
+void ucb1x00_enable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges);
+void ucb1x00_disable_irq(struct ucb1x00 *ucb, unsigned int idx, int edges);
+int ucb1x00_free_irq(struct ucb1x00 *ucb, unsigned int idx, void *devid);
+
+#endif