From a38da2ed74f628c1f3e907c772be21a66eccab9c Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Tue, 31 Mar 2009 15:24:32 -0700 Subject: [PATCH] lis3: solve dependency between core and ACPI This solves the dependency between lis3lv02d.[ch] and ACPI specific methods. It introduces a ->bus_priv pointer to the device struct which is casted to 'struct acpi_device' in the ACIP layer. Changed hp_accel.c accordingly. Signed-off-by: Daniel Mack Acked-by: Pavel Machek Acked-by: Eric Piel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/hwmon/hp_accel.c | 99 +++++++++++++++------------------------ drivers/hwmon/lis3lv02d.c | 86 ++++++++++++++++++++++------------ drivers/hwmon/lis3lv02d.h | 20 ++++---- 3 files changed, 105 insertions(+), 100 deletions(-) diff --git a/drivers/hwmon/hp_accel.c b/drivers/hwmon/hp_accel.c index de26b1c3a96c..55d3dc565be6 100644 --- a/drivers/hwmon/hp_accel.c +++ b/drivers/hwmon/hp_accel.c @@ -85,25 +85,31 @@ MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids); /** * lis3lv02d_acpi_init - ACPI _INI method: initialize the device. - * @handle: the handle of the device + * @lis3: pointer to the device struct * - * Returns AE_OK on success. + * Returns 0 on success. */ -acpi_status lis3lv02d_acpi_init(acpi_handle handle) +int lis3lv02d_acpi_init(struct lis3lv02d *lis3) { - return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL); + struct acpi_device *dev = lis3->bus_priv; + if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI, + NULL, NULL) != AE_OK) + return -EINVAL; + + return 0; } /** * lis3lv02d_acpi_read - ACPI ALRD method: read a register - * @handle: the handle of the device + * @lis3: pointer to the device struct * @reg: the register to read * @ret: result of the operation * - * Returns AE_OK on success. + * Returns 0 on success. */ -acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret) +int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret) { + struct acpi_device *dev = lis3->bus_priv; union acpi_object arg0 = { ACPI_TYPE_INTEGER }; struct acpi_object_list args = { 1, &arg0 }; unsigned long long lret; @@ -111,21 +117,22 @@ acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret) arg0.integer.value = reg; - status = acpi_evaluate_integer(handle, "ALRD", &args, &lret); + status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret); *ret = lret; - return status; + return (status != AE_OK) ? -EINVAL : 0; } /** * lis3lv02d_acpi_write - ACPI ALWR method: write to a register - * @handle: the handle of the device + * @lis3: pointer to the device struct * @reg: the register to write to * @val: the value to write * - * Returns AE_OK on success. + * Returns 0 on success. */ -acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val) +int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val) { + struct acpi_device *dev = lis3->bus_priv; unsigned long long ret; /* Not used when writting */ union acpi_object in_obj[2]; struct acpi_object_list args = { 2, in_obj }; @@ -135,7 +142,10 @@ acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val) in_obj[1].type = ACPI_TYPE_INTEGER; in_obj[1].integer.value = val; - return acpi_evaluate_integer(handle, "ALWR", &args, &ret); + if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK) + return -EINVAL; + + return 0; } static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) @@ -217,7 +227,7 @@ static struct dmi_system_id lis3lv02d_dmi_ids[] = { static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value) { - acpi_handle handle = lis3_dev.device->handle; + struct acpi_device *dev = lis3_dev.bus_priv; unsigned long long ret; /* Not used when writing */ union acpi_object in_obj[1]; struct acpi_object_list args = { 1, in_obj }; @@ -225,7 +235,7 @@ static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness in_obj[0].type = ACPI_TYPE_INTEGER; in_obj[0].integer.value = !!value; - acpi_evaluate_integer(handle, "ALED", &args, &ret); + acpi_evaluate_integer(dev->handle, "ALED", &args, &ret); } static struct delayed_led_classdev hpled_led = { @@ -262,23 +272,6 @@ static void lis3lv02d_enum_resources(struct acpi_device *device) printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n"); } -static s16 lis3lv02d_read_16(acpi_handle handle, int reg) -{ - u8 lo, hi; - - lis3_dev.read(handle, reg - 1, &lo); - lis3_dev.read(handle, reg, &hi); - /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ - return (s16)((hi << 8) | lo); -} - -static s16 lis3lv02d_read_8(acpi_handle handle, int reg) -{ - s8 lo; - lis3_dev.read(handle, reg, &lo); - return lo; -} - static int lis3lv02d_add(struct acpi_device *device) { int ret; @@ -286,7 +279,7 @@ static int lis3lv02d_add(struct acpi_device *device) if (!device) return -EINVAL; - lis3_dev.device = device; + lis3_dev.bus_priv = device; lis3_dev.init = lis3lv02d_acpi_init; lis3_dev.read = lis3lv02d_acpi_read; lis3_dev.write = lis3lv02d_acpi_write; @@ -294,23 +287,8 @@ static int lis3lv02d_add(struct acpi_device *device) strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); device->driver_data = &lis3_dev; - lis3lv02d_acpi_read(device->handle, WHO_AM_I, &lis3_dev.whoami); - switch (lis3_dev.whoami) { - case LIS_DOUBLE_ID: - printk(KERN_INFO DRIVER_NAME ": 2-byte sensor found\n"); - lis3_dev.read_data = lis3lv02d_read_16; - lis3_dev.mdps_max_val = 2048; - break; - case LIS_SINGLE_ID: - printk(KERN_INFO DRIVER_NAME ": 1-byte sensor found\n"); - lis3_dev.read_data = lis3lv02d_read_8; - lis3_dev.mdps_max_val = 128; - break; - default: - printk(KERN_ERR DRIVER_NAME - ": unknown sensor type 0x%X\n", lis3_dev.whoami); - return -EINVAL; - } + /* obtain IRQ number of our device from ACPI */ + lis3lv02d_enum_resources(device); /* If possible use a "standard" axes order */ if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { @@ -319,18 +297,17 @@ static int lis3lv02d_add(struct acpi_device *device) lis3_dev.ac = lis3lv02d_axis_normal; } - INIT_WORK(&hpled_led.work, delayed_set_status_worker); - ret = led_classdev_register(NULL, &hpled_led.led_classdev); + /* call the core layer do its init */ + ret = lis3lv02d_init_device(&lis3_dev); if (ret) return ret; - /* obtain IRQ number of our device from ACPI */ - lis3lv02d_enum_resources(lis3_dev.device); - - ret = lis3lv02d_init_device(&lis3_dev); + INIT_WORK(&hpled_led.work, delayed_set_status_worker); + ret = led_classdev_register(NULL, &hpled_led.led_classdev); if (ret) { + lis3lv02d_joystick_disable(); + lis3lv02d_poweroff(&lis3_dev); flush_work(&hpled_led.work); - led_classdev_unregister(&hpled_led.led_classdev); return ret; } @@ -343,7 +320,7 @@ static int lis3lv02d_remove(struct acpi_device *device, int type) return -EINVAL; lis3lv02d_joystick_disable(); - lis3lv02d_poweroff(device->handle); + lis3lv02d_poweroff(&lis3_dev); flush_work(&hpled_led.work); led_classdev_unregister(&hpled_led.led_classdev); @@ -356,7 +333,7 @@ static int lis3lv02d_remove(struct acpi_device *device, int type) static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) { /* make sure the device is off when we suspend */ - lis3lv02d_poweroff(device->handle); + lis3lv02d_poweroff(&lis3_dev); return 0; } @@ -365,9 +342,9 @@ static int lis3lv02d_resume(struct acpi_device *device) /* put back the device in the right state (ACPI might turn it on) */ mutex_lock(&lis3_dev.lock); if (lis3_dev.usage > 0) - lis3lv02d_poweron(device->handle); + lis3lv02d_poweron(&lis3_dev); else - lis3lv02d_poweroff(device->handle); + lis3lv02d_poweroff(&lis3_dev); mutex_unlock(&lis3_dev.lock); return 0; } diff --git a/drivers/hwmon/lis3lv02d.c b/drivers/hwmon/lis3lv02d.c index eeae7c9600e4..778eb7795983 100644 --- a/drivers/hwmon/lis3lv02d.c +++ b/drivers/hwmon/lis3lv02d.c @@ -36,7 +36,6 @@ #include #include #include -#include #include #include "lis3lv02d.h" @@ -53,18 +52,27 @@ * joystick. */ -struct acpi_lis3lv02d lis3_dev = { +struct lis3lv02d lis3_dev = { .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), }; EXPORT_SYMBOL_GPL(lis3_dev); -static s16 lis3lv02d_read_16(acpi_handle handle, int reg) +static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg) +{ + s8 lo; + if (lis3->read(lis3, reg, &lo) < 0) + return 0; + + return lo; +} + +static s16 lis3lv02d_read_16(struct lis3lv02d *lis3, int reg) { u8 lo, hi; - lis3_dev.read(handle, reg, &lo); - lis3_dev.read(handle, reg + 1, &hi); + lis3->read(lis3, reg - 1, &lo); + lis3->read(lis3, reg, &hi); /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ return (s16)((hi << 8) | lo); } @@ -86,36 +94,36 @@ static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) /** * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer - * @handle: the handle to the device - * @x: where to store the X axis value - * @y: where to store the Y axis value - * @z: where to store the Z axis value + * @lis3: pointer to the device struct + * @x: where to store the X axis value + * @y: where to store the Y axis value + * @z: where to store the Z axis value * * Note that 40Hz input device can eat up about 10% CPU at 800MHZ */ -static void lis3lv02d_get_xyz(acpi_handle handle, int *x, int *y, int *z) +static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) { int position[3]; - position[0] = lis3_dev.read_data(handle, OUTX); - position[1] = lis3_dev.read_data(handle, OUTY); - position[2] = lis3_dev.read_data(handle, OUTZ); + position[0] = lis3_dev.read_data(lis3, OUTX); + position[1] = lis3_dev.read_data(lis3, OUTY); + position[2] = lis3_dev.read_data(lis3, OUTZ); *x = lis3lv02d_get_axis(lis3_dev.ac.x, position); *y = lis3lv02d_get_axis(lis3_dev.ac.y, position); *z = lis3lv02d_get_axis(lis3_dev.ac.z, position); } -void lis3lv02d_poweroff(acpi_handle handle) +void lis3lv02d_poweroff(struct lis3lv02d *lis3) { lis3_dev.is_on = 0; } EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); -void lis3lv02d_poweron(acpi_handle handle) +void lis3lv02d_poweron(struct lis3lv02d *lis3) { lis3_dev.is_on = 1; - lis3_dev.init(handle); + lis3_dev.init(lis3); } EXPORT_SYMBOL_GPL(lis3lv02d_poweron); @@ -124,13 +132,13 @@ EXPORT_SYMBOL_GPL(lis3lv02d_poweron); * device will always be on until a call to lis3lv02d_decrease_use(). Not to be * used from interrupt context. */ -static void lis3lv02d_increase_use(struct acpi_lis3lv02d *dev) +static void lis3lv02d_increase_use(struct lis3lv02d *dev) { mutex_lock(&dev->lock); dev->usage++; if (dev->usage == 1) { if (!dev->is_on) - lis3lv02d_poweron(dev->device->handle); + lis3lv02d_poweron(dev); } mutex_unlock(&dev->lock); } @@ -139,12 +147,12 @@ static void lis3lv02d_increase_use(struct acpi_lis3lv02d *dev) * To be called whenever a usage of the device is stopped. * It will make sure to turn off the device when there is not usage. */ -static void lis3lv02d_decrease_use(struct acpi_lis3lv02d *dev) +static void lis3lv02d_decrease_use(struct lis3lv02d *dev) { mutex_lock(&dev->lock); dev->usage--; if (dev->usage == 0) - lis3lv02d_poweroff(dev->device->handle); + lis3lv02d_poweroff(dev); mutex_unlock(&dev->lock); } @@ -291,7 +299,7 @@ static int lis3lv02d_joystick_kthread(void *data) int x, y, z; while (!kthread_should_stop()) { - lis3lv02d_get_xyz(lis3_dev.device->handle, &x, &y, &z); + lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); input_report_abs(lis3_dev.idev, ABS_X, x - lis3_dev.xcalib); input_report_abs(lis3_dev.idev, ABS_Y, y - lis3_dev.ycalib); input_report_abs(lis3_dev.idev, ABS_Z, z - lis3_dev.zcalib); @@ -325,7 +333,8 @@ static void lis3lv02d_joystick_close(struct input_dev *input) static inline void lis3lv02d_calibrate_joystick(void) { - lis3lv02d_get_xyz(lis3_dev.device->handle, &lis3_dev.xcalib, &lis3_dev.ycalib, &lis3_dev.zcalib); + lis3lv02d_get_xyz(&lis3_dev, + &lis3_dev.xcalib, &lis3_dev.ycalib, &lis3_dev.zcalib); } int lis3lv02d_joystick_enable(void) @@ -382,7 +391,7 @@ static ssize_t lis3lv02d_position_show(struct device *dev, int x, y, z; lis3lv02d_increase_use(&lis3_dev); - lis3lv02d_get_xyz(lis3_dev.device->handle, &x, &y, &z); + lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); lis3lv02d_decrease_use(&lis3_dev); return sprintf(buf, "(%d,%d,%d)\n", x, y, z); } @@ -412,7 +421,7 @@ static ssize_t lis3lv02d_rate_show(struct device *dev, int val; lis3lv02d_increase_use(&lis3_dev); - lis3_dev.read(lis3_dev.device->handle, CTRL_REG1, &ctrl); + lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); lis3lv02d_decrease_use(&lis3_dev); val = (ctrl & (CTRL1_DF0 | CTRL1_DF1)) >> 4; return sprintf(buf, "%d\n", lis3lv02dl_df_val[val]); @@ -435,7 +444,7 @@ static struct attribute_group lis3lv02d_attribute_group = { }; -static int lis3lv02d_add_fs(struct acpi_device *device) +static int lis3lv02d_add_fs(struct lis3lv02d *lis3) { lis3_dev.pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); if (IS_ERR(lis3_dev.pdev)) @@ -456,10 +465,29 @@ EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); * Initialise the accelerometer and the various subsystems. * Should be rather independant of the bus system. */ -int lis3lv02d_init_device(struct acpi_lis3lv02d *dev) +int lis3lv02d_init_device(struct lis3lv02d *dev) { + dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I); + + switch (dev->whoami) { + case LIS_DOUBLE_ID: + printk(KERN_INFO DRIVER_NAME ": 2-byte sensor found\n"); + dev->read_data = lis3lv02d_read_16; + dev->mdps_max_val = 2048; + break; + case LIS_SINGLE_ID: + printk(KERN_INFO DRIVER_NAME ": 1-byte sensor found\n"); + dev->read_data = lis3lv02d_read_8; + dev->mdps_max_val = 128; + break; + default: + printk(KERN_ERR DRIVER_NAME + ": unknown sensor type 0x%X\n", lis3_dev.whoami); + return -EINVAL; + } + mutex_init(&dev->lock); - lis3lv02d_add_fs(dev->device); + lis3lv02d_add_fs(dev); lis3lv02d_increase_use(dev); if (lis3lv02d_joystick_enable()) @@ -467,10 +495,10 @@ int lis3lv02d_init_device(struct acpi_lis3lv02d *dev) printk("lis3_init_device: irq %d\n", dev->irq); - /* if we did not get an IRQ from ACPI - we have nothing more to do */ + /* bail if we did not get an IRQ from the bus layer */ if (!dev->irq) { printk(KERN_ERR DRIVER_NAME - ": No IRQ in ACPI. Disabling /dev/freefall\n"); + ": No IRQ. Disabling /dev/freefall\n"); goto out; } diff --git a/drivers/hwmon/lis3lv02d.h b/drivers/hwmon/lis3lv02d.h index 017fb2b754d5..745ec96806d4 100644 --- a/drivers/hwmon/lis3lv02d.h +++ b/drivers/hwmon/lis3lv02d.h @@ -159,14 +159,14 @@ struct axis_conversion { s8 z; }; -struct acpi_lis3lv02d { - struct acpi_device *device; /* The ACPI device */ - acpi_status (*init) (acpi_handle handle); - acpi_status (*write) (acpi_handle handle, int reg, u8 val); - acpi_status (*read) (acpi_handle handle, int reg, u8 *ret); +struct lis3lv02d { + void *bus_priv; /* used by the bus layer only */ + int (*init) (struct lis3lv02d *lis3); + int (*write) (struct lis3lv02d *lis3, int reg, u8 val); + int (*read) (struct lis3lv02d *lis3, int reg, u8 *ret); u8 whoami; /* 3Ah: 2-byte registries, 3Bh: 1-byte registries */ - s16 (*read_data) (acpi_handle handle, int reg); + s16 (*read_data) (struct lis3lv02d *lis3, int reg); int mdps_max_val; struct input_dev *idev; /* input device */ @@ -187,11 +187,11 @@ struct acpi_lis3lv02d { unsigned long misc_opened; /* bit0: whether the device is open */ }; -int lis3lv02d_init_device(struct acpi_lis3lv02d *dev); +int lis3lv02d_init_device(struct lis3lv02d *lis3); int lis3lv02d_joystick_enable(void); void lis3lv02d_joystick_disable(void); -void lis3lv02d_poweroff(acpi_handle handle); -void lis3lv02d_poweron(acpi_handle handle); +void lis3lv02d_poweroff(struct lis3lv02d *lis3); +void lis3lv02d_poweron(struct lis3lv02d *lis3); int lis3lv02d_remove_fs(void); -extern struct acpi_lis3lv02d lis3_dev; +extern struct lis3lv02d lis3_dev; -- 2.20.1