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openwrt/target/linux/s3c24xx/patches-2.6.24/1306--lis302dl-refactor-and...

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From 3318a7cb3165a33046e122294e1878e3bd6555d8 Mon Sep 17 00:00:00 2001
From: Simon Kagstrom <simon.kagstrom@gmail.com>
Date: Thu, 16 Oct 2008 01:19:20 +0100
Subject: [PATCH] : lis302dl-refactor-and-cleanup.patch
Some code refactoring.
From: Simon Kagstrom <simon.kagstrom@gmail.com>
Re-added __reg_read and __reg_write and re-indent the code according to
these. Move some input-related functions to get a more "logical" order,
e.g., in the future we might want to support clicks again and call these
from read_sample. Removed unused function pointer in the structure
Signed-off-by: Simon Kagstrom <simon.kagstrom@gmail.com>
---
drivers/input/misc/lis302dl.c | 260 ++++++++++++++++++++---------------------
include/linux/lis302dl.h | 1 -
2 files changed, 125 insertions(+), 136 deletions(-)
diff --git a/drivers/input/misc/lis302dl.c b/drivers/input/misc/lis302dl.c
index 1013f4a..300918d 100644
--- a/drivers/input/misc/lis302dl.c
+++ b/drivers/input/misc/lis302dl.c
@@ -43,19 +43,58 @@
#include <linux/lis302dl.h>
+/* Utility functions */
+static u8 __reg_read(struct lis302dl_info *lis, u8 reg)
+{
+ return (lis->pdata->lis302dl_bitbang_reg_read)(lis, reg);
+}
+static void __reg_write(struct lis302dl_info *lis, u8 reg, u8 val)
+{
+ (lis->pdata->lis302dl_bitbang_reg_write)(lis, reg, val);
+}
static void __reg_set_bit_mask(struct lis302dl_info *lis, u8 reg, u8 mask,
- u8 val)
+ u8 val)
{
u_int8_t tmp;
val &= mask;
- tmp = (lis->pdata->lis302dl_bitbang_reg_read)(lis, reg);
+ tmp = __reg_read(lis, reg);
tmp &= ~mask;
tmp |= val;
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, reg, tmp);
+ __reg_write(lis, reg, tmp);
+}
+
+static int __ms_to_duration(struct lis302dl_info *lis, int ms)
+{
+ u8 r = __reg_read(lis, LIS302DL_REG_CTRL1);
+
+ /* If we have 400 ms sampling rate, the stepping is 2.5 ms,
+ * on 100 ms the stepping is 10ms */
+ if (r & LIS302DL_CTRL1_DR) {
+ /* Too large */
+ if (ms > 637)
+ return -1;
+
+ return (ms * 10) / 25;
+ }
+
+ /* Too large value */
+ if (ms > 2550)
+ return -1;
+ return ms / 10;
+}
+
+static int __duration_to_ms(struct lis302dl_info *lis, int duration)
+{
+ u8 r = __reg_read(lis, LIS302DL_REG_CTRL1);
+
+ if (r & LIS302DL_CTRL1_DR)
+ return (duration * 25) / 10;
+
+ return duration * 10;
}
/* interrupt handling related */
@@ -69,30 +108,6 @@ enum lis302dl_intmode {
LIS302DL_INTMODE_CLICK = 0x07,
};
-#define MG_PER_SAMPLE 18
-
-static void lis302dl_bitbang_read_sample(struct lis302dl_info *lis)
-{
- u8 data = 0xc0 | LIS302DL_REG_OUT_X; /* read, autoincrement */
- u8 read[5];
- unsigned long flags;
-
- local_irq_save(flags);
-
- (lis->pdata->lis302dl_bitbang)(lis, &data, 1, &read[0], 5);
-
- local_irq_restore(flags);
-
- input_report_rel(lis->input_dev, REL_X, MG_PER_SAMPLE * (s8)read[0]);
- input_report_rel(lis->input_dev, REL_Y, MG_PER_SAMPLE * (s8)read[2]);
- input_report_rel(lis->input_dev, REL_Z, MG_PER_SAMPLE * (s8)read[4]);
-
- input_sync(lis->input_dev);
-
- /* Reset the HP filter */
- (lis->pdata->lis302dl_bitbang_reg_read)(lis,
- LIS302DL_REG_HP_FILTER_RESET);
-}
static void __lis302dl_int_mode(struct device *dev, int int_pin,
enum lis302dl_intmode mode)
@@ -110,6 +125,7 @@ static void __lis302dl_int_mode(struct device *dev, int int_pin,
BUG();
}
}
+
#if 0
static void _report_btn_single(struct input_dev *inp, int btn)
{
@@ -130,6 +146,29 @@ static void _report_btn_double(struct input_dev *inp, int btn)
}
#endif
+#define MG_PER_SAMPLE 18
+
+static void lis302dl_bitbang_read_sample(struct lis302dl_info *lis)
+{
+ u8 data = 0xc0 | LIS302DL_REG_OUT_X; /* read, autoincrement */
+ u8 read[5];
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ (lis->pdata->lis302dl_bitbang)(lis, &data, 1, &read[0], 5);
+
+ local_irq_restore(flags);
+
+ input_report_rel(lis->input_dev, REL_X, MG_PER_SAMPLE * (s8)read[0]);
+ input_report_rel(lis->input_dev, REL_Y, MG_PER_SAMPLE * (s8)read[2]);
+ input_report_rel(lis->input_dev, REL_Z, MG_PER_SAMPLE * (s8)read[4]);
+
+ input_sync(lis->input_dev);
+
+ /* Reset the HP filter */
+ __reg_read(lis, LIS302DL_REG_HP_FILTER_RESET);
+}
static irqreturn_t lis302dl_interrupt(int irq, void *_lis)
{
@@ -149,8 +188,7 @@ static ssize_t show_rate(struct device *dev, struct device_attribute *attr,
unsigned long flags;
local_irq_save(flags);
- ctrl1 = (lis->pdata->lis302dl_bitbang_reg_read)
- (lis, LIS302DL_REG_CTRL1);
+ ctrl1 = __reg_read(lis, LIS302DL_REG_CTRL1);
local_irq_restore(flags);
return sprintf(buf, "%d\n", ctrl1 & LIS302DL_CTRL1_DR ? 400 : 100);
@@ -185,8 +223,7 @@ static ssize_t show_scale(struct device *dev, struct device_attribute *attr,
unsigned long flags;
local_irq_save(flags);
- ctrl1 = (lis->pdata->lis302dl_bitbang_reg_read)(lis,
- LIS302DL_REG_CTRL1);
+ ctrl1 = __reg_read(lis, LIS302DL_REG_CTRL1);
local_irq_restore(flags);
return sprintf(buf, "%s\n", ctrl1 & LIS302DL_CTRL1_FS ? "9.2" : "2.3");
@@ -236,8 +273,7 @@ static ssize_t set_threshold(struct device *dev, struct device_attribute *attr,
/* Set the threshold and write it out if the device is used */
lis->threshold = val;
if (lis->flags & LIS302DL_F_INPUT_OPEN)
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- LIS302DL_REG_FF_WU_THS_1, lis->threshold);
+ __reg_write(lis, LIS302DL_REG_FF_WU_THS_1, lis->threshold);
return count;
}
@@ -256,7 +292,7 @@ static ssize_t lis302dl_dump(struct device *dev, struct device_attribute *attr,
local_irq_save(flags);
for (n = 0; n < sizeof(reg); n++)
- reg[n] = (lis->pdata->lis302dl_bitbang_reg_read)(lis, n);
+ reg[n] = __reg_read(lis, n);
local_irq_restore(flags);
@@ -271,36 +307,6 @@ static ssize_t lis302dl_dump(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR(dump, S_IRUGO, lis302dl_dump, NULL);
-static int __freefall_ms_to_duration(struct lis302dl_info *lis, int ms)
-{
- u8 r = (lis->pdata->lis302dl_bitbang_reg_read)(lis, LIS302DL_REG_CTRL1);
-
- /* If we have 400 ms sampling rate, the stepping is 2.5 ms,
- * on 100 ms the stepping is 10ms */
- if (r & LIS302DL_CTRL1_DR) {
- /* Too large */
- if (ms > 637)
- return -1;
-
- return (ms * 10) / 25;
- }
-
- /* Too large value */
- if (ms > 2550)
- return -1;
- return ms / 10;
-}
-
-static int __freefall_duration_to_ms(struct lis302dl_info *lis, int duration)
-{
- u8 r = (lis->pdata->lis302dl_bitbang_reg_read)(lis, LIS302DL_REG_CTRL1);
-
- if (r & LIS302DL_CTRL1_DR)
- return (duration * 25) / 10;
-
- return duration * 10;
-}
-
/* Configure freefall/wakeup interrupts */
static ssize_t set_freefall_common(int which, struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
@@ -342,9 +348,9 @@ static ssize_t set_freefall_common(int which, struct device *dev,
LIS302DL_INTMODE_DATA_READY);
lis->flags &= ~(flag_mask | LIS302DL_F_IRQ_WAKE);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, r_cfg, 0);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, r_ths, 0);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, r_duration, 0);
+ __reg_write(lis, r_cfg, 0);
+ __reg_write(lis, r_ths, 0);
+ __reg_write(lis, r_duration, 0);
/* Power off unless the input subsystem is using the device */
if (!(lis->flags & LIS302DL_F_INPUT_OPEN))
@@ -361,7 +367,7 @@ static ssize_t set_freefall_common(int which, struct device *dev,
return -EINVAL;
local_irq_save(flags);
- duration = __freefall_ms_to_duration(lis, ms);
+ duration = __ms_to_duration(lis, ms);
local_irq_save(flags);
if (duration < 0)
@@ -382,13 +388,12 @@ static ssize_t set_freefall_common(int which, struct device *dev,
/* Setup the configuration registers */
local_irq_save(flags);
/* First zero to get to a known state */
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, r_cfg, 0);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, r_cfg,
+ __reg_write(lis, r_cfg, 0);
+ __reg_write(lis, r_cfg,
(and_events ? LIS302DL_FFWUCFG_AOI : 0) |
x_lo | x_hi | y_lo | y_hi | z_lo | z_hi);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, r_ths,
- threshold & ~LIS302DL_FFWUTHS_DCRM);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, r_duration, duration);
+ __reg_write(lis, r_ths, threshold & ~LIS302DL_FFWUTHS_DCRM);
+ __reg_write(lis, r_duration, duration);
/* Route the interrupt for wakeup */
__lis302dl_int_mode(lis->dev, which, intmode);
@@ -443,12 +448,12 @@ static ssize_t show_freefall_common(int which, struct device *dev,
}
local_irq_save(flags);
- config = (lis->pdata->lis302dl_bitbang_reg_read)(lis, r_cfg);
- threshold = (lis->pdata->lis302dl_bitbang_reg_read)(lis, r_ths);
- duration = (lis->pdata->lis302dl_bitbang_reg_read)(lis, r_duration);
- r4 = (lis->pdata->lis302dl_bitbang_reg_read)(lis, r_src);
- r5 = (lis->pdata->lis302dl_bitbang_reg_read)(lis, LIS302DL_REG_CTRL3);
- ms = __freefall_duration_to_ms(lis, duration);
+ config = __reg_read(lis, r_cfg);
+ threshold = __reg_read(lis, r_ths);
+ duration = __reg_read(lis, r_duration);
+ r4 = __reg_read(lis, r_src);
+ r5 = __reg_read(lis, LIS302DL_REG_CTRL3);
+ ms = __duration_to_ms(lis, duration);
local_irq_restore(flags);
/* All events off? */
@@ -519,18 +524,14 @@ static int lis302dl_input_open(struct input_dev *inp)
/* make sure we're powered up and generate data ready */
__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, ctrl1, ctrl1);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL2,
+ __reg_write(lis, LIS302DL_REG_CTRL2,
ctrl2);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- LIS302DL_REG_FF_WU_THS_1, lis->threshold);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- LIS302DL_REG_FF_WU_DURATION_1, 0);
+ __reg_write(lis, LIS302DL_REG_FF_WU_THS_1, lis->threshold);
+ __reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1, 0);
/* Clear the HP filter "starting point" */
- (lis->pdata->lis302dl_bitbang_reg_read)(lis,
- LIS302DL_REG_HP_FILTER_RESET);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- LIS302DL_REG_FF_WU_CFG_1, LIS302DL_FFWUCFG_XHIE |
+ __reg_read(lis, LIS302DL_REG_HP_FILTER_RESET);
+ __reg_write(lis, LIS302DL_REG_FF_WU_CFG_1, LIS302DL_FFWUCFG_XHIE |
LIS302DL_FFWUCFG_YHIE | LIS302DL_FFWUCFG_ZHIE);
lis->flags |= LIS302DL_F_INPUT_OPEN;
@@ -576,11 +577,11 @@ static int __lis302dl_reset_device(struct lis302dl_info *lis)
{
int timeout = 10;
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL2,
- LIS302DL_CTRL2_BOOT | LIS302DL_CTRL2_FDS);
+ __reg_write(lis, LIS302DL_REG_CTRL2,
+ LIS302DL_CTRL2_BOOT | LIS302DL_CTRL2_FDS);
- while (((lis->pdata->lis302dl_bitbang_reg_read)(lis, LIS302DL_REG_CTRL2)
- & LIS302DL_CTRL2_BOOT) && (timeout--))
+ while ((__reg_read(lis, LIS302DL_REG_CTRL2)
+ & LIS302DL_CTRL2_BOOT) && (timeout--))
mdelay(1);
return !!(timeout < 0);
@@ -609,8 +610,7 @@ static int __devinit lis302dl_probe(struct platform_device *pdev)
/* Configure our IO */
(lis->pdata->lis302dl_suspend_io)(lis, 1);
- wai = (lis->pdata->lis302dl_bitbang_reg_read)(lis,
- LIS302DL_REG_WHO_AM_I);
+ wai = __reg_read(lis, LIS302DL_REG_WHO_AM_I);
if (wai != LIS302DL_WHO_AM_I_MAGIC) {
dev_err(lis->dev, "unknown who_am_i signature 0x%02x\n", wai);
dev_set_drvdata(lis->dev, NULL);
@@ -659,46 +659,38 @@ static int __devinit lis302dl_probe(struct platform_device *pdev)
dev_err(lis->dev, "device BOOT reload failed\n");
/* force us powered */
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL1,
- LIS302DL_CTRL1_PD |
- LIS302DL_CTRL1_Xen |
- LIS302DL_CTRL1_Yen |
- LIS302DL_CTRL1_Zen);
+ __reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_PD |
+ LIS302DL_CTRL1_Xen |
+ LIS302DL_CTRL1_Yen |
+ LIS302DL_CTRL1_Zen);
mdelay(1);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL2, 0);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL3,
- LIS302DL_CTRL3_PP_OD | LIS302DL_CTRL3_IHL);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- LIS302DL_REG_FF_WU_THS_1, 0x0);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- LIS302DL_REG_FF_WU_DURATION_1, 0x00);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- LIS302DL_REG_FF_WU_CFG_1, 0x0);
+ __reg_write(lis, LIS302DL_REG_CTRL2, 0);
+ __reg_write(lis, LIS302DL_REG_CTRL3,
+ LIS302DL_CTRL3_PP_OD | LIS302DL_CTRL3_IHL);
+ __reg_write(lis, LIS302DL_REG_FF_WU_THS_1, 0x0);
+ __reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1, 0x00);
+ __reg_write(lis, LIS302DL_REG_FF_WU_CFG_1, 0x0);
/* start off in powered down mode; we power up when someone opens us */
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL1,
- LIS302DL_CTRL1_Xen |
- LIS302DL_CTRL1_Yen |
- LIS302DL_CTRL1_Zen);
+ __reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_Xen |
+ LIS302DL_CTRL1_Yen | LIS302DL_CTRL1_Zen);
if (pdata->open_drain)
/* switch interrupt to open collector, active-low */
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- LIS302DL_REG_CTRL3, LIS302DL_CTRL3_PP_OD |
- LIS302DL_CTRL3_IHL);
+ __reg_write(lis, LIS302DL_REG_CTRL3,
+ LIS302DL_CTRL3_PP_OD | LIS302DL_CTRL3_IHL);
else
/* push-pull, active-low */
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- LIS302DL_REG_CTRL3, LIS302DL_CTRL3_IHL);
+ __reg_write(lis, LIS302DL_REG_CTRL3, LIS302DL_CTRL3_IHL);
__lis302dl_int_mode(lis->dev, 1, LIS302DL_INTMODE_FF_WU_12);
__lis302dl_int_mode(lis->dev, 2, LIS302DL_INTMODE_FF_WU_12);
- (lis->pdata->lis302dl_bitbang_reg_read)(lis, LIS302DL_REG_STATUS);
- (lis->pdata->lis302dl_bitbang_reg_read)(lis, LIS302DL_REG_FF_WU_SRC_1);
- (lis->pdata->lis302dl_bitbang_reg_read)(lis, LIS302DL_REG_FF_WU_SRC_2);
- (lis->pdata->lis302dl_bitbang_reg_read)(lis, LIS302DL_REG_CLICK_SRC);
+ __reg_read(lis, LIS302DL_REG_STATUS);
+ __reg_read(lis, LIS302DL_REG_FF_WU_SRC_1);
+ __reg_read(lis, LIS302DL_REG_FF_WU_SRC_2);
+ __reg_read(lis, LIS302DL_REG_CLICK_SRC);
dev_info(lis->dev, "Found %s\n", pdata->name);
@@ -733,9 +725,9 @@ static int __devexit lis302dl_remove(struct platform_device *pdev)
/* Reset and power down the device */
local_irq_save(flags);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL3, 0x00);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL2, 0x00);
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL1, 0x00);
+ __reg_write(lis, LIS302DL_REG_CTRL3, 0x00);
+ __reg_write(lis, LIS302DL_REG_CTRL2, 0x00);
+ __reg_write(lis, LIS302DL_REG_CTRL1, 0x00);
local_irq_restore(flags);
/* Cleanup resources */
@@ -798,13 +790,12 @@ static int lis302dl_suspend(struct platform_device *pdev, pm_message_t state)
/* save registers */
for (n = 0; n < ARRAY_SIZE(regs_to_save); n++)
lis->regs[regs_to_save[n]] =
- (lis->pdata->lis302dl_bitbang_reg_read)(lis,
- regs_to_save[n]);
+ __reg_read(lis, regs_to_save[n]);
/* power down */
- tmp = (lis->pdata->lis302dl_bitbang_reg_read)(lis, LIS302DL_REG_CTRL1);
+ tmp = __reg_read(lis, LIS302DL_REG_CTRL1);
tmp &= ~LIS302DL_CTRL1_PD;
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL1, tmp);
+ __reg_write(lis, LIS302DL_REG_CTRL1, tmp);
/* place our IO to the device in sleep-compatible states */
(lis->pdata->lis302dl_suspend_io)(lis, 0);
@@ -830,11 +821,11 @@ static int lis302dl_resume(struct platform_device *pdev)
(lis->pdata->lis302dl_suspend_io)(lis, 1);
/* resume from powerdown first! */
- (lis->pdata->lis302dl_bitbang_reg_write)(lis, LIS302DL_REG_CTRL1,
- LIS302DL_CTRL1_PD |
- LIS302DL_CTRL1_Xen |
- LIS302DL_CTRL1_Yen |
- LIS302DL_CTRL1_Zen);
+ __reg_write(lis, LIS302DL_REG_CTRL1,
+ LIS302DL_CTRL1_PD |
+ LIS302DL_CTRL1_Xen |
+ LIS302DL_CTRL1_Yen |
+ LIS302DL_CTRL1_Zen);
mdelay(1);
if (__lis302dl_reset_device(lis))
@@ -847,8 +838,7 @@ static int lis302dl_resume(struct platform_device *pdev)
/* restore registers after resume */
for (n = 0; n < ARRAY_SIZE(regs_to_save); n++)
- (lis->pdata->lis302dl_bitbang_reg_write)(lis,
- regs_to_save[n], lis->regs[regs_to_save[n]]);
+ __reg_write(lis, regs_to_save[n], lis->regs[regs_to_save[n]]);
local_irq_restore(flags);
enable_irq(lis->pdata->interrupt);
diff --git a/include/linux/lis302dl.h b/include/linux/lis302dl.h
index f3f994d..a756f55 100644
--- a/include/linux/lis302dl.h
+++ b/include/linux/lis302dl.h
@@ -18,7 +18,6 @@ struct lis302dl_platform_data {
int interrupt;
void (*lis302dl_bitbang)(struct lis302dl_info *lis, u8 *tx,
int tx_bytes, u8 *rx, int rx_bytes);
- void (*lis302dl_bitbang_read_sample)(struct lis302dl_info *);
void (*lis302dl_suspend_io)(struct lis302dl_info *, int resuming);
int (*lis302dl_bitbang_reg_read)(struct lis302dl_info *, u8 reg);
void (*lis302dl_bitbang_reg_write)(struct lis302dl_info *, u8 reg,
--
1.5.6.5
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