n810: Add retu/tahvo userspace interface debugging

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22747 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 327 insertions, 1 deletions

diff --git a/target/linux/omap24xx/config-2.6.35 b/target/linux/omap24xx/config-2.6.35
index e844ad80b..92043b64d 100644
--- a/target/linux/omap24xx/config-2.6.35
+++ b/target/linux/omap24xx/config-2.6.35
@@ -67,10 +67,12 @@ CONFIG_CBUS_RETU_HEADSET=y
 CONFIG_CBUS_RETU_POWERBUTTON=y
 CONFIG_CBUS_RETU_RTC=y
 CONFIG_CBUS_RETU_USER=y
+CONFIG_CBUS_RETU_USER_DEBUG=y
 CONFIG_CBUS_RETU_WDT=y
 CONFIG_CBUS_TAHVO=y
 # CONFIG_CBUS_TAHVO_USB is not set
 CONFIG_CBUS_TAHVO_USER=y
+CONFIG_CBUS_TAHVO_USER_DEBUG=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_CMDLINE="root=/dev/mmcblk0p1 rootfstype=ext3,ext2,squashfs,jffs2 console=tty0 console=ttyS2,115200n8"
 CONFIG_CMDLINE_FORCE=y
@@ -295,7 +297,7 @@ CONFIG_LEDS_TRIGGER_GPIO=y
 # CONFIG_LIS3L02DQ is not set
 CONFIG_LLC=m
 CONFIG_LOCK_KERNEL=y
-CONFIG_LOG_BUF_SHIFT=17
+CONFIG_LOG_BUF_SHIFT=18
 CONFIG_LZO_COMPRESS=y
 CONFIG_LZO_DECOMPRESS=y
 CONFIG_MACH_NOKIA_N800=y
diff --git a/target/linux/omap24xx/patches-2.6.35/510-retu-tahvo-user-debugging.patch b/target/linux/omap24xx/patches-2.6.35/510-retu-tahvo-user-debugging.patch
new file mode 100644
index 000000000..0e4cd128d
--- /dev/null
+++ b/target/linux/omap24xx/patches-2.6.35/510-retu-tahvo-user-debugging.patch
@@ -0,0 +1,324 @@
+---
+ drivers/cbus/Kconfig      |    8 +++
+ drivers/cbus/retu-user.c  |  117 +++++++++++++++++++++++++++++++++++++++++++++-
+ drivers/cbus/tahvo-user.c |   75 +++++++++++++++++++++++++++++
+ 3 files changed, 198 insertions(+), 2 deletions(-)
+
+--- linux-2.6.35.orig/drivers/cbus/Kconfig
++++ linux-2.6.35/drivers/cbus/Kconfig
+@@ -28,6 +28,10 @@ config CBUS_TAHVO_USER
+ 	  If you want support for Tahvo's user space read/write etc. functions,
+ 	  you should say Y here.
+ 
++config CBUS_TAHVO_USER_DEBUG
++	depends on CBUS_TAHVO_USER
++	bool "Enable Tahvo user space interface debugging"
++
+ config CBUS_TAHVO_USB
+ 	depends on CBUS_TAHVO && USB
+ 	tristate "Support for Tahvo USB transceiver"
+@@ -56,6 +60,10 @@ config CBUS_RETU_USER
+ 	  If you want support for Retu's user space read/write etc. functions,
+ 	  you should say Y here.
+ 
++config CBUS_RETU_USER_DEBUG
++	depends on CBUS_RETU_USER
++	bool "Enable Retu user space interface debugging"
++
+ config CBUS_RETU_POWERBUTTON
+ 	depends on CBUS_RETU
+ 	bool "Support for Retu power button"
+--- linux-2.6.35.orig/drivers/cbus/retu-user.c
++++ linux-2.6.35/drivers/cbus/retu-user.c
+@@ -46,6 +46,12 @@
+ 
+ #define PFX			"retu-user: "
+ 
++#ifdef CONFIG_CBUS_RETU_USER_DEBUG
++# define dprintk(fmt, x...)	printk(KERN_DEBUG PFX fmt, x)
++#else
++# define dprintk(fmt, x...)	do { } while (0)
++#endif
++
+ /* Bitmap for marking the interrupt sources as having the handlers */
+ static u32 retu_irq_bits;
+ 
+@@ -105,6 +111,94 @@ static const u8 retu_access_bits[] = {
+ 	3
+ };
+ 
++#ifdef CONFIG_CBUS_RETU_USER_DEBUG
++static const char * reg_access_text(unsigned int reg)
++{
++	if (WARN_ON(reg >= ARRAY_SIZE(retu_access_bits)))
++		return "X";
++	switch (retu_access_bits[reg]) {
++	case READ_ONLY:
++		return "R";
++	case WRITE_ONLY:
++		return "W";
++	case READ_WRITE:
++		return "RW";
++	case TOGGLE:
++		return "T";
++	}
++	return "X";
++}
++
++static const char * reg_name(unsigned int reg)
++{
++	static const char *names[] = {
++		[RETU_REG_ASICR]	= "ASIC ID & revision",
++		[RETU_REG_IDR]		= "Interrupt ID",
++		[RETU_REG_IMR]		= "Interrupt mask",
++		[RETU_REG_RTCDSR]	= "RTC seconds register",
++		[RETU_REG_RTCHMR]	= "RTC hours and minutes register",
++		[RETU_REG_RTCHMAR]	= "hours and minutes alarm and time set register",
++		[RETU_REG_RTCCALR]	= "RTC calibration register",
++		[RETU_REG_ADCR]		= "ADC result",
++		[RETU_REG_ADCSCR]	= "ADC sample ctrl",
++		[RETU_REG_CC1]		= "Common control register 1",
++		[RETU_REG_CC2]		= "Common control register 2",
++		[RETU_REG_CTRL_CLR]	= "Regulator clear register",
++		[RETU_REG_CTRL_SET]	= "Regulator set register",
++		[RETU_REG_STATUS]	= "Status register",
++		[RETU_REG_WATCHDOG]	= "Watchdog register",
++		[RETU_REG_AUDTXR]	= "Audio Codec Tx register",
++		[0x14]			= "Charger detect?",
++	};
++	const char *name;
++
++	if (reg >= ARRAY_SIZE(names))
++		return "";
++	name = names[reg];
++	if (!name)
++		return "";
++	return name;
++}
++
++static const char * adc_chan_name(unsigned int chan)
++{
++	static const char *names[] = {
++		[0x05]		= "Headset hook detect",
++	};
++	const char *name;
++
++	if (chan >= ARRAY_SIZE(names))
++		return "";
++	name = names[chan];
++	if (!name)
++		return "";
++	return name;
++}
++
++static const char * retu_irq_name(unsigned int id)
++{
++	static const char *names[] = {
++		[RETU_INT_PWR]		= "Power",
++		[RETU_INT_CHAR]		= "Char",
++		[RETU_INT_RTCS]		= "RTCS",
++		[RETU_INT_RTCM]		= "RTCM",
++		[RETU_INT_RTCD]		= "RTCD",
++		[RETU_INT_RTCA]		= "RTCA",
++		[RETU_INT_HOOK]		= "Hook",
++		[RETU_INT_HEAD]		= "Head",
++		[RETU_INT_ADCS]		= "ADC timer",
++	};
++	const char *name;
++
++	if (id >= ARRAY_SIZE(names))
++		return "";
++	name = names[id];
++	if (!name)
++		return "";
++	return name;
++}
++#endif
++
+ /*
+  * The handler for all RETU interrupts.
+  *
+@@ -157,6 +251,8 @@ static int retu_user_subscribe_to_irq(in
+ 	/* Mark that this interrupt has a handler */
+ 	retu_irq_bits |= 1 << id;
+ 
++	dprintk("Subscribed to IRQ %d (%s)\n", id, retu_irq_name(id));
++
+ 	return 0;
+ }
+ 
+@@ -216,6 +312,10 @@ static int retu_user_write_with_mask(u32
+ 
+ 	/* Generate new value */
+ 	tmp = (tmp & ~MASK(field)) | (value & MASK(field));
++
++	dprintk("{WRITE %s} 0x%02X(%s) <= msk 0x%04X, val 0x%04X ==> res 0x%04X\n",
++		reg_name(reg), reg, reg_access_text(reg), MASK(field), value, tmp);
++
+ 	/* Write data to RETU */
+ 	retu_write_reg(reg, tmp);
+ 	spin_unlock_irqrestore(&retu_lock, flags);
+@@ -244,6 +344,9 @@ static u32 retu_user_read_with_mask(u32
+ 	/* Read the register */
+ 	value = retu_read_reg(reg) & mask;
+ 
++	dprintk("{READ %s} 0x%02X(%s) <= msk 0x%04X ==> res 0x%04X\n",
++		reg_name(reg), reg, reg_access_text(reg), mask, value);
++
+ 	/* Right justify value */
+ 	while (!(mask & 1)) {
+ 		value = value >> 1;
+@@ -274,7 +377,7 @@ static int retu_ioctl(struct inode *inod
+ 		      unsigned int cmd, unsigned long arg)
+ {
+ 	struct retu_tahvo_write_parms par;
+-	int ret;
++	int ret, result;
+ 
+ 	switch (cmd) {
+ 	case URT_IOCT_IRQ_SUBSCR:
+@@ -291,7 +394,15 @@ static int retu_ioctl(struct inode *inod
+ 			printk(KERN_ERR "copy_to_user failed: %d\n", ret);
+ 		break;
+ 	case RETU_IOCH_ADC_READ:
+-		return retu_read_adc(arg);
++		result = retu_read_adc(arg);
++		if (result >= 0) {
++			dprintk("{READ-ADC %s} chan 0x%02lX ==> result 0x%04X\n",
++				adc_chan_name(arg), arg, result);
++		} else {
++			dprintk("{READ-ADC %s} chan 0x%02lX ==> failed %d\n",
++				adc_chan_name(arg), arg, result);
++		}
++		return result;
+ 	default:
+ 		return -ENOIOCTLCMD;
+ 	}
+@@ -333,6 +444,8 @@ static ssize_t retu_read(struct file *fi
+ 		list_move(&irq->node, &retu_irqs_reserve);
+ 		spin_unlock_irqrestore(&retu_irqs_lock, flags);
+ 
++		dprintk("{IRQ %s} %d delivered\n", retu_irq_name(irq_id), (int)irq_id);
++
+ 		ret = copy_to_user(buf + i * sizeof(irq_id), &irq_id,
+ 				   sizeof(irq_id));
+ 		if (ret)
+--- linux-2.6.35.orig/drivers/cbus/tahvo-user.c
++++ linux-2.6.35/drivers/cbus/tahvo-user.c
+@@ -46,6 +46,12 @@
+ 
+ #define PFX			"tahvo-user: "
+ 
++#ifdef CONFIG_CBUS_TAHVO_USER_DEBUG
++# define dprintk(fmt, x...)	printk(KERN_DEBUG PFX fmt, x)
++#else
++# define dprintk(fmt, x...)	do { } while (0)
++#endif
++
+ /* Bitmap for marking the interrupt sources as having the handlers */
+ static u32 tahvo_irq_bits;
+ 
+@@ -87,6 +93,64 @@ static const u8 tahvo_access_bits[] = {
+ 	1
+ };
+ 
++#ifdef CONFIG_CBUS_TAHVO_USER_DEBUG
++static const char * reg_access_text(unsigned int reg)
++{
++	if (WARN_ON(reg >= ARRAY_SIZE(tahvo_access_bits)))
++		return "X";
++	switch (tahvo_access_bits[reg]) {
++	case READ_ONLY:
++		return "R";
++	case WRITE_ONLY:
++		return "W";
++	case READ_WRITE:
++		return "RW";
++	case TOGGLE:
++		return "T";
++	}
++	return "X";
++}
++
++static const char * reg_name(unsigned int reg)
++{
++	static const char *names[] = {
++		[TAHVO_REG_ASICR]	= "ASIC ID & revision",
++		[TAHVO_REG_IDR]		= "Interrupt ID",
++		[TAHVO_REG_IDSR]	= "Interrupt status",
++		[TAHVO_REG_IMR]		= "Interrupt mask",
++		[TAHVO_REG_LEDPWMR]	= "LED PWM",
++		[TAHVO_REG_USBR]	= "USB control",
++		[0x04]			= "Charge current control?",
++		[0x08]			= "Charge ctl 1?",
++		[0x0C]			= "Charge ctl 2?",
++		[0x0D]			= "Battery current ADC?",
++	};
++	const char *name;
++
++	if (reg >= ARRAY_SIZE(names))
++		return "";
++	name = names[reg];
++	if (!name)
++		return "";
++	return name;
++}
++
++static const char * tahvo_irq_name(unsigned int id)
++{
++	static const char *names[] = {
++		[TAHVO_INT_VBUSON]	= "VBUSON",
++	};
++	const char *name;
++
++	if (id >= ARRAY_SIZE(names))
++		return "";
++	name = names[id];
++	if (!name)
++		return "";
++	return name;
++}
++#endif
++
+ /*
+  * The handler for all TAHVO interrupts.
+  *
+@@ -142,6 +206,8 @@ static int tahvo_user_subscribe_to_irq(i
+ 	/* Mark that this interrupt has a handler */
+ 	tahvo_irq_bits |= 1 << id;
+ 
++	dprintk("Subscribed to IRQ %d (%s)\n", id, tahvo_irq_name(id));
++
+ 	return 0;
+ }
+ 
+@@ -200,6 +266,10 @@ static int tahvo_user_write_with_mask(u3
+ 	}
+ 	/* Generate a new value */
+ 	tmp = (tmp & ~MASK(field)) | (value & MASK(field));
++
++	dprintk("{WRITE %s} 0x%02X(%s) <= msk 0x%04X, val 0x%04X ==> res 0x%04X\n",
++		reg_name(reg), reg, reg_access_text(reg), MASK(field), value, tmp);
++
+ 	/* Write data to TAHVO */
+ 	tahvo_write_reg(reg, tmp);
+ 	spin_unlock_irqrestore(&tahvo_lock, flags);
+@@ -228,6 +298,9 @@ static u32 tahvo_user_read_with_mask(u32
+ 	/* Read the register */
+ 	value = tahvo_read_reg(reg) & mask;
+ 
++	dprintk("{READ %s} 0x%02X(%s) <= msk 0x%04X ==> res 0x%04X\n",
++		reg_name(reg), reg, reg_access_text(reg), mask, value);
++
+ 	/* Right justify value */
+ 	while (!(mask & 1)) {
+ 		value = value >> 1;
+@@ -315,6 +388,8 @@ static ssize_t tahvo_read(struct file *f
+ 		list_move(&irq->node, &tahvo_irqs_reserve);
+ 		spin_unlock_irqrestore(&tahvo_irqs_lock, flags);
+ 
++		dprintk("{IRQ %s} %d delivered\n", tahvo_irq_name(irq_id), (int)irq_id);
++
+ 		ret = copy_to_user(buf + i * sizeof(irq_id), &irq_id,
+                                   sizeof(irq_id));
+ 		if (ret)