diff options
Diffstat (limited to 'drivers/char/ds1620.c')
| -rw-r--r-- | drivers/char/ds1620.c | 87 |
1 files changed, 55 insertions, 32 deletions
diff --git a/drivers/char/ds1620.c b/drivers/char/ds1620.c index 334ad5bbe6b..0fae5296e31 100644 --- a/drivers/char/ds1620.c +++ b/drivers/char/ds1620.c @@ -6,10 +6,12 @@ #include <linux/miscdevice.h> #include <linux/delay.h> #include <linux/proc_fs.h> +#include <linux/seq_file.h> #include <linux/capability.h> #include <linux/init.h> +#include <linux/mutex.h> -#include <asm/hardware.h> +#include <mach/hardware.h> #include <asm/mach-types.h> #include <asm/uaccess.h> #include <asm/therm.h> @@ -33,6 +35,7 @@ #define CFG_CPU 2 #define CFG_1SHOT 1 +static DEFINE_MUTEX(ds1620_mutex); static const char *fan_state[] = { "off", "on", "on (hardwired)" }; /* @@ -42,52 +45,51 @@ static const char *fan_state[] = { "off", "on", "on (hardwired)" }; * chance that the WaveArtist driver could touch these bits to * enable or disable the speaker. */ -extern spinlock_t gpio_lock; extern unsigned int system_rev; static inline void netwinder_ds1620_set_clk(int clk) { - gpio_modify_op(GPIO_DSCLK, clk ? GPIO_DSCLK : 0); + nw_gpio_modify_op(GPIO_DSCLK, clk ? GPIO_DSCLK : 0); } static inline void netwinder_ds1620_set_data(int dat) { - gpio_modify_op(GPIO_DATA, dat ? GPIO_DATA : 0); + nw_gpio_modify_op(GPIO_DATA, dat ? GPIO_DATA : 0); } static inline int netwinder_ds1620_get_data(void) { - return gpio_read() & GPIO_DATA; + return nw_gpio_read() & GPIO_DATA; } static inline void netwinder_ds1620_set_data_dir(int dir) { - gpio_modify_io(GPIO_DATA, dir ? GPIO_DATA : 0); + nw_gpio_modify_io(GPIO_DATA, dir ? GPIO_DATA : 0); } static inline void netwinder_ds1620_reset(void) { - cpld_modify(CPLD_DS_ENABLE, 0); - cpld_modify(CPLD_DS_ENABLE, CPLD_DS_ENABLE); + nw_cpld_modify(CPLD_DS_ENABLE, 0); + nw_cpld_modify(CPLD_DS_ENABLE, CPLD_DS_ENABLE); } static inline void netwinder_lock(unsigned long *flags) { - spin_lock_irqsave(&gpio_lock, *flags); + raw_spin_lock_irqsave(&nw_gpio_lock, *flags); } static inline void netwinder_unlock(unsigned long *flags) { - spin_unlock_irqrestore(&gpio_lock, *flags); + raw_spin_unlock_irqrestore(&nw_gpio_lock, *flags); } static inline void netwinder_set_fan(int i) { unsigned long flags; - spin_lock_irqsave(&gpio_lock, flags); - gpio_modify_op(GPIO_FAN, i ? GPIO_FAN : 0); - spin_unlock_irqrestore(&gpio_lock, flags); + raw_spin_lock_irqsave(&nw_gpio_lock, flags); + nw_gpio_modify_op(GPIO_FAN, i ? GPIO_FAN : 0); + raw_spin_unlock_irqrestore(&nw_gpio_lock, flags); } static inline int netwinder_get_fan(void) @@ -95,7 +97,7 @@ static inline int netwinder_get_fan(void) if ((system_rev & 0xf000) == 0x4000) return FAN_ALWAYS_ON; - return (gpio_read() & GPIO_FAN) ? FAN_ON : FAN_OFF; + return (nw_gpio_read() & GPIO_FAN) ? FAN_ON : FAN_OFF; } /* @@ -208,6 +210,11 @@ static void ds1620_read_state(struct therm *therm) therm->hi = cvt_9_to_int(ds1620_in(THERM_READ_TH, 9)); } +static int ds1620_open(struct inode *inode, struct file *file) +{ + return nonseekable_open(inode, file); +} + static ssize_t ds1620_read(struct file *file, char __user *buf, size_t count, loff_t *ptr) { @@ -226,7 +233,7 @@ ds1620_read(struct file *file, char __user *buf, size_t count, loff_t *ptr) } static int -ds1620_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) +ds1620_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct therm therm; union { @@ -310,10 +317,20 @@ ds1620_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned return 0; } +static long +ds1620_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + int ret; + + mutex_lock(&ds1620_mutex); + ret = ds1620_ioctl(file, cmd, arg); + mutex_unlock(&ds1620_mutex); + + return ret; +} + #ifdef THERM_USE_PROC -static int -proc_therm_ds1620_read(char *buf, char **start, off_t offset, - int len, int *eof, void *unused) +static int ds1620_proc_therm_show(struct seq_file *m, void *v) { struct therm th; int temp; @@ -321,24 +338,33 @@ proc_therm_ds1620_read(char *buf, char **start, off_t offset, ds1620_read_state(&th); temp = cvt_9_to_int(ds1620_in(THERM_READ_TEMP, 9)); - len = sprintf(buf, "Thermostat: HI %i.%i, LOW %i.%i; " - "temperature: %i.%i C, fan %s\n", - th.hi >> 1, th.hi & 1 ? 5 : 0, - th.lo >> 1, th.lo & 1 ? 5 : 0, - temp >> 1, temp & 1 ? 5 : 0, - fan_state[netwinder_get_fan()]); + seq_printf(m, "Thermostat: HI %i.%i, LOW %i.%i; temperature: %i.%i C, fan %s\n", + th.hi >> 1, th.hi & 1 ? 5 : 0, + th.lo >> 1, th.lo & 1 ? 5 : 0, + temp >> 1, temp & 1 ? 5 : 0, + fan_state[netwinder_get_fan()]); + return 0; +} - return len; +static int ds1620_proc_therm_open(struct inode *inode, struct file *file) +{ + return single_open(file, ds1620_proc_therm_show, NULL); } -static struct proc_dir_entry *proc_therm_ds1620; +static const struct file_operations ds1620_proc_therm_fops = { + .open = ds1620_proc_therm_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; #endif static const struct file_operations ds1620_fops = { .owner = THIS_MODULE, - .open = nonseekable_open, + .open = ds1620_open, .read = ds1620_read, - .ioctl = ds1620_ioctl, + .unlocked_ioctl = ds1620_unlocked_ioctl, + .llseek = no_llseek, }; static struct miscdevice ds1620_miscdev = { @@ -378,10 +404,7 @@ static int __init ds1620_init(void) return ret; #ifdef THERM_USE_PROC - proc_therm_ds1620 = create_proc_entry("therm", 0, NULL); - if (proc_therm_ds1620) - proc_therm_ds1620->read_proc = proc_therm_ds1620_read; - else + if (!proc_create("therm", 0, NULL, &ds1620_proc_therm_fops)) printk(KERN_ERR "therm: unable to register /proc/therm\n"); #endif |