Header for pwm speaker driver

pwmsp.h

@@ -0,0 +1,41 @@
+#ifndef __PWMSP_H__
+#define __PWMSP_H__
+#define PWMSP_SOUND_VERSION 0x100	/* read 1.00 */
+#define PWMSP_DEBUG 0
+#define PWMSP_MAX_TREBLE 1
+#define PWMSP_DEFAULT_TREBLE 0
+#define PWMSP_DEFAULT_SRATE 128 // 128, 256, 512 ... 16384Kb/Sec how to decide??
+#define PWMSP_MAX_PERIOD_SIZE	(64*1024)
+#define PWMSP_MAX_PERIODS	512
+#define PWMSP_BUFFER_SIZE	(128*1024)
+#define DATA_BITS	256
+#define BASE_CLOCK 	(DATA_BITS*8192) //256*8khz
+#define SLEEP_TIME	(DATA_BITS*1000/BASE_CLOCK) //milliseconds
+/*defines for ioctl()*/
+#include "pwm.h"
+struct snd_pwmsp {
+	struct snd_card *card;
+	struct snd_pcm *pcm;
+	struct input_dev *input_dev;
+	//int fd;
+	unsigned short port, irq, dma;
+	spinlock_t substream_lock;
+	struct snd_pcm_substream *playback_substream;
+	unsigned int fmt_size;
+	unsigned int is_signed;
+	size_t playback_ptr;
+	size_t period_ptr;
+	atomic_t active;
+	int enable;
+	int max_treble;
+	int treble;
+};
+
+extern struct snd_pwmsp pwmsp_chip;
+extern void pwmsp_sync_stop(struct snd_pwmsp *chip);
+extern int snd_pwmsp_new_pcm(struct snd_pwmsp *chip);
+extern struct pwm_dev *pwm_devs;
+extern int set_pwm_frequency(struct pwm_dev *,int);
+extern int set_duty_cycle(struct pwm_dev *,int);
+extern int pwm_off(struct pwm_dev *);
+#endif