linux-kernel - [PATCH 1/7] MFD: ASIC3: add API for EXTCF and SDHWCTRL register manipulation

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Message-Id: <1244140576-18006-2-git-send-email-philipp.zabel@gmail.com>
Date:	Thu,  4 Jun 2009 20:36:10 +0200
From:	Philipp Zabel <philipp.zabel@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Samuel Ortiz <sameo@...nedhand.com>,
	Philipp Zabel <philipp.zabel@...il.com>
Subject: [PATCH 1/7] MFD: ASIC3: add API for EXTCF and SDHWCTRL register manipulation

Those registers are needed for PCMCIA and MMC/SDIO operation as
well as for the DS1WM.

Signed-off-by: Philipp Zabel <philipp.zabel@...il.com>
---
 drivers/mfd/asic3.c       |   48 +++++++++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/asic3.h |   13 +++++++----
 2 files changed, 56 insertions(+), 5 deletions(-)

diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index 9e48545..8e1653a 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -52,6 +52,54 @@ static inline u32 asic3_read_register(struct asic3 *asic,
 			(reg >> asic->bus_shift));
 }
 
+void asic3_set_extcf_select(struct device *dev, u32 bits, int value)
+{
+	struct asic3 *asic = dev->driver_data;
+	unsigned long flags;
+	u32 v;
+
+	spin_lock_irqsave(&asic->lock, flags);
+	v = asic3_read_register(asic, ASIC3_OFFSET(EXTCF, SELECT));
+	if (value)
+		v |= bits;
+	else
+		v &= ~bits;
+	asic3_write_register(asic, ASIC3_OFFSET(EXTCF, SELECT), v);
+	spin_unlock_irqrestore(&asic->lock, flags);
+}
+EXPORT_SYMBOL(asic3_set_extcf_select);
+
+void asic3_set_extcf_reset(struct device *dev, u32 bits, int value)
+{
+	struct asic3 *asic = dev->driver_data;
+	unsigned long flags;
+	u32 v;
+
+	spin_lock_irqsave(&asic->lock, flags);
+	v = asic3_read_register(asic, ASIC3_OFFSET(EXTCF, RESET));
+	if (value)
+		v |= bits;
+	else
+		v &= ~bits;
+	asic3_write_register(asic, ASIC3_OFFSET(EXTCF, RESET), v);
+	spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+void asic3_set_sdhwctrl(struct asic3 *asic, u32 bits, int value)
+{
+	unsigned long flags;
+	u32 v;
+
+	spin_lock_irqsave(&asic->lock, flags);
+	v = asic3_read_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF));
+	if (value)
+		v |= bits;
+	else
+		v &= ~bits;
+	asic3_write_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), v);
+	spin_unlock_irqrestore(&asic->lock, flags);
+}
+
 /* IRQs */
 #define MAX_ASIC_ISR_LOOPS    20
 #define ASIC3_GPIO_BASE_INCR \
diff --git a/include/linux/mfd/asic3.h b/include/linux/mfd/asic3.h
index 322cd6d..cd02d20 100644
--- a/include/linux/mfd/asic3.h
+++ b/include/linux/mfd/asic3.h
@@ -16,6 +16,9 @@
 
 #include <linux/types.h>
 
+/* for PCMCIA */
+extern void asic3_set_extcf_select(struct device *dev, u32 bits, int value);
+
 struct asic3_platform_data {
 	u16 *gpio_config;
 	unsigned int gpio_config_num;
@@ -227,8 +230,8 @@ struct asic3_platform_data {
 
 
 /* Basic control of the SD ASIC */
-#define ASIC3_SDHWCTRL_Base	0x0E00
-#define ASIC3_SDHWCTRL_SDConf    0x00
+#define ASIC3_SDHWCTRL_BASE     0x0E00
+#define ASIC3_SDHWCTRL_SDCONF     0x00
 
 #define ASIC3_SDHWCTRL_SUSPEND    (1 << 0)  /* 1=suspend all SD operations */
 #define ASIC3_SDHWCTRL_CLKSEL     (1 << 1)  /* 1=SDICK, 0=HCLK */
@@ -242,10 +245,10 @@ struct asic3_platform_data {
 /* SD card power supply ctrl 1=enable */
 #define ASIC3_SDHWCTRL_SDPWR      (1 << 6)
 
-#define ASIC3_EXTCF_Base		0x1100
+#define ASIC3_EXTCF_BASE        0x1100
 
-#define ASIC3_EXTCF_Select         0x00
-#define ASIC3_EXTCF_Reset          0x04
+#define ASIC3_EXTCF_SELECT        0x00
+#define ASIC3_EXTCF_RESET         0x04
 
 #define ASIC3_EXTCF_SMOD0	         (1 << 0)  /* slot number of mode 0 */
 #define ASIC3_EXTCF_SMOD1	         (1 << 1)  /* slot number of mode 1 */
-- 
1.6.3.1

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