[Armadeus-commitlog] SF.net SVN: armadeus: [583] trunk/target/linux/modules/pwm
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[Armadeus-commitlog] SF.net SVN: armadeus: [583] trunk/target/linux/modules/pwm
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From: <ar...@us...> - 2007-04-15 09:23:59
|
Revision: 583
http://armadeus.svn.sourceforge.net/armadeus/?rev=583&view=rev
Author: artemys
Date: 2007-04-15 02:23:57 -0700 (Sun, 15 Apr 2007)
Log Message:
-----------
[DRIVERS] Add sound file playing capability to PWM driver
Modified Paths:
--------------
trunk/target/linux/modules/pwm/core.c
trunk/target/linux/modules/pwm/test/Makefile
trunk/target/linux/modules/pwm/test/testplaymode.c
Added Paths:
-----------
trunk/target/linux/modules/pwm/test/Chimes.raw
trunk/target/linux/modules/pwm/test/KDE_Startup_2.raw
Modified: trunk/target/linux/modules/pwm/core.c
===================================================================
--- trunk/target/linux/modules/pwm/core.c 2007-04-02 20:27:06 UTC (rev 582)
+++ trunk/target/linux/modules/pwm/core.c 2007-04-15 09:23:57 UTC (rev 583)
@@ -3,7 +3,7 @@
* Driver for the i.MXl PWM driver
*
* This driver is part of the Armadeus project and is the merge of a lot of ideas
- * found on Internet.
+ * found on the Web.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -21,6 +21,7 @@
*
*
*/
+//#define DEBUG 1
#include <linux/module.h>
#include <linux/version.h>
@@ -39,10 +40,6 @@
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/in.h>
-//#include <linux/malloc.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/string.h>
@@ -50,20 +47,24 @@
#include <asm/bitops.h>
#include <asm/io.h>
#include <linux/errno.h>
-//#include <linux/tqueue.h>
#include <linux/wait.h>
#include <linux/pm.h>
// For /sys
#include <linux/sysdev.h>
// For struct class
#include <linux/device.h>
+// For circular buffer
+#include <linux/circ_buf.h>
#include <asm/irq.h>
#include <asm/arch/hardware.h>
#include <asm/arch/irqs.h>
// For register adresses
#include <asm/arch/imx-regs.h>
-#define PWMC_PRESCALER_MASK (0x7F << 8) // not defined in imx-regs ?
+// additional defines
+#define PWMC_PRESCALER_MASK 0x00007F00
+#define PWMC_REPEAT_MASK 0x0000000C
+#define PWMC_CLKSEL_MASK 0x00000003
//
#include <linux/platform_device.h>
@@ -72,7 +73,7 @@
#define PWM_TEST
#define DRIVER_NAME "imx-pwm"
-#define DRIVER_VERSION "0.4"
+#define DRIVER_VERSION "0.5"
#define DEV_IRQ_NAME DRIVER_NAME
#define DEV_IRQ_ID DRIVER_NAME
@@ -80,13 +81,7 @@
//#define PK(fmt, args...) printk(fmt, ## args)
#define PK(...)
-#define PWM_FIFO_AV 0x20
-#define PWM_IRQ_AV 0x80
-// def in linux/compiler.h
-//#define unlikely(TOTO) (TOTO > 0)
-
-
struct pwm_device {
u32 reg;
int active;
@@ -100,21 +95,20 @@
#define to_pwm_device(d) container_of(d, struct pwm_device, class_dev)
-// variables
-int gWriteOk;
+// Global variables
int gPwmMode;
-char *gpWriteBuf;
+//char *gpWriteBuf;
+int g4bytes; // count 4 bytes write occurence to FIFO
+u8 *gpWriteBufPtr;
+u16 *gpWriteBufPtr16;
+int gDataLen = PWM_DATA_8BIT;
+u16 gSampleValue;
-u8 *gpWriteBufPtr8;
-u16 *gpWriteBufPtr16;
-int gWriteCnt;
-int gDataLen;
-u16 gSampleValue;
-
int irq = 0;
module_param(irq, int, 0);
-wait_queue_head_t ts_wait;
+wait_queue_head_t write_wait;
+wait_queue_head_t exit_wait;
struct fasync_struct *ts_fasync;
int gMajor = 0; /* TODO dynamic major for now */
@@ -205,7 +199,51 @@
}
};
+/****************************************************************
+ * Circular buffer handling four sound playing
+ ***************************************************************/
+struct sound_circ_buf {
+ char* buf;
+ int write; // == head
+ int read; // == tail
+ int size;
+};
+
+static inline u8 get_byte_from_circbuf( struct sound_circ_buf* abuffer )
+{
+ u8 b = abuffer->buf[ abuffer->read ];
+ abuffer->read = (abuffer->read + 1) & (abuffer->size - 1);
+ return b;
+}
+
+static inline u16 get_word_from_circbuf( struct sound_circ_buf* abuffer )
+{
+ u16 w = *((u16*)((abuffer->buf)[ abuffer->read ]));
+ abuffer->read = (abuffer->read + 2) & (abuffer->size - 1);
+ return w;
+}
+
+static inline void put_byte_to_circbuf( struct sound_circ_buf* abuffer, unsigned char abyte )
+{
+ abuffer->buf[ abuffer->write ] = abyte;
+ abuffer->write = (abuffer->write + 1) & (abuffer->size - 1);
+}
+
+static inline void increase_circbuf( struct sound_circ_buf* abuffer, int count )
+{
+ abuffer->write = (abuffer->write + count) & (abuffer->size - 1);
+ pr_debug("Added %d bytes to buffer, now write is in pos %d\n", count, abuffer->write);
+}
+
+#define MAX_SOUND_BUFFER_SIZE (16*1024) // !! Should be a power of 2 !!
+static struct sound_circ_buf gPWM_Circ_Buf;
+
+/****************************************************************
+ *
+ ***************************************************************/
+
+
/**
* setup_pwm_unit - common setup function whenever something was changed
* @ppd: PWM unit to work with
@@ -223,10 +261,10 @@
// Setup prescaler
pr_debug("Updating PWM registers\n");
PWMC = (PWMC & ~PWMC_PRESCALER_MASK) | PWMC_PRESCALER(ppd->entry->prescaler) /*| PWMC_REPEAT(3)*/;
-
+
// Setup period
PWMP = PWMP_PERIOD(ppd->entry->period);
-
+
// Setup duty
PWMS = PWMS_SAMPLE( (u32) ((ppd->entry->period * ppd->duty) / 1000) );
/* unsigned duty;
@@ -245,41 +283,6 @@
}
}
-
-// -----------------------
-// FUNCTION ROUTINES
-// -----------------------
-
-//delay for a while
-// static void delay (void)
-// {
-// u32 i=0;
-// for (i=0; i<10000; i++);
-// }
-
-//software reset
-// static void soft_reset (void)
-// {
-// // int i;
-//
-// //enable the PWM
-// PWMC |= 0x00000010;
-//
-// // set SWR bit to 1
-// PWMC |= 0x00010000;
-//
-// //disable the PWM
-// PWMC &= ~0x00000010;
-//
-// //delay because PWM released after 5 system clock
-// udelay(5);
-// // for(i=0;i<5;i++)
-// // delay();
-// }
-
-// --------------------------------------------------------------------
-// local rutines
-
/******************************************************************************
* Function Name: checkDevice
*
@@ -340,22 +343,15 @@
static void StopPwm(void)
{
- if(gpWriteBuf)
- kfree(gpWriteBuf);
-
PWMC &= ~PWMC_IRQEN; // disable IRQ
PWMC &= ~PWMC_EN; // disable PWM
- gWriteOk = 1;
- gWriteCnt = 0;
- gDataLen = 0;
gSampleValue = 0;
-
if(gPwmMode == PWM_TONE_MODE)
- StopTimer(&pwmTimer);
+ StopTimer(&pwmTimer);
- // can release PWM now
- wake_up_interruptible(&ts_wait);
+ // Can release file now
+ wake_up_interruptible(&exit_wait);
PK("<1>data completed.\n");
PK("<1>PWMC = 0x%8x\n", (u32)PWMC);
@@ -363,30 +359,30 @@
static void pwmIntFunc( unsigned long unused)
{
- u32 period;
+// u32 period;
PK("<1>pwm sam int\n");
- if (gWriteCnt > 0)
- {
- PK("<1>PWMS = 0x%4x\n", (u16)_reg_PWM_PWMS);
+// if (gWriteCnt > 0)
+// {
+// PK("<1>PWMS = 0x%4x\n", (u16)_reg_PWM_PWMS);
+//
+// // 96M/128/2/period
+// period = *gpWriteBufPtr16++;
+//
+// if(period > 0)
+// // PWMP = 96000000/128/12/2/period; //96000000/128/2*11
+// PWMP = 66000000/128/2/period; //96000000/128/2*11
+// PK("<1>PWMP = 0x%4x\n", (u16)PWMP);
+// PK("<1>PWMCNT = 0x%4x\n", (u16)PWMCNT);
+//
+// StartTimer(&pwmTimer);
+//
+// gWriteCnt--;
+// }
+// else
+// StopPwm();
- // 96M/128/2/period
- period = *gpWriteBufPtr16++;
-
- if(period > 0)
-// PWMP = 96000000/128/12/2/period; //96000000/128/2*11
- PWMP = 66000000/128/2/period; //96000000/128/2*11
- PK("<1>PWMP = 0x%4x\n", (u16)PWMP);
- PK("<1>PWMCNT = 0x%4x\n", (u16)PWMCNT);
-
- StartTimer(&pwmTimer);
-
- gWriteCnt--;
- }
- else
- StopPwm();
-
}
// static int handle_pm_event(struct pm_dev *dev, pm_request_t rqst, void *data)
@@ -411,13 +407,10 @@
/******************************************************************************
*
*****************************************************************************/
-
static int initPWM(void)
{
- // Init Port PA[2] : PWMO
- //PCCR1 |= 0x10000000; PA2_PF_PWM0;
+ // Init Port PA[2] : PWMO
// Should be done in apf9328.c non ???
-
DDIR(0) |= 0x00000002;
GIUS(0) &= ~0x00000002;
GPR(0) &= ~0x00000002;
@@ -434,32 +427,33 @@
return 1;
}
-//////////////////////////////////////// /DEV INTERFACE //////////////////////////////////////////////////////////////
+//////////////////////////////////////// /DEV INTERFACE ////////////////////////////////////////////
/*
- *
+ * Called from user space close()
*/
int pwm_release(struct inode * inode, struct file * filp)
{
// wait unit gWriteCnt == 0
- interruptible_sleep_on(&ts_wait);
+ interruptible_sleep_on(&exit_wait);
- printk(DRIVER_NAME " unloaded successfully\n");
+ if( gPWM_Circ_Buf.buf ) {
+ kfree( gPWM_Circ_Buf.buf );
+ gPWM_Circ_Buf.buf = 0;
+ }
+ printk(DRIVER_NAME " released, 4 bytes FIFO usage: %d\n", g4bytes);
return 0;
}
/*
- *
+ * Called from user space open()
*/
int pwm_open(struct inode * inode, struct file * filp)
{
- PK("<1>in pwm_open ----\n");
-
// Init PWM hardware
initPWM();
- gWriteOk = 0;
- printk(DRIVER_NAME " opened \n");
+ pr_debug(DRIVER_NAME " opened \n");
return 0;
}
@@ -468,224 +462,243 @@
*/
static int pwm_fasync(int fd, struct file *filp, int mode)
{
- PK("<1>in pwm_fasyn ----\n");
+ PK("<1>in pwm_fasyn ----\n");
#if 0
- /* TODO TODO put this data into file private data */
- int minor = checkDevice( filp->f_dentry->d_inode);
- if ( minor == - 1)
- {
- PK("<1>asp_fasyn:bad device minor\n");
- return -ENODEV;
- }
+ /* TODO TODO put this data into file private data */
+ int minor = checkDevice( filp->f_dentry->d_inode);
+ if ( minor == - 1)
+ {
+ PK("<1>asp_fasyn:bad device minor\n");
+ return -ENODEV;
+ }
- return( fasync_helper(fd, filp, mode, &ts_fasync) );
+ return( fasync_helper(fd, filp, mode, &ts_fasync) );
#endif
- return 0;
+ return 0;
}
/*
- *
+ * Called from user space ioctl()
*/
int pwm_ioctl(struct inode * inode, struct file *filp, unsigned int cmd, unsigned long arg)
{
char *str=NULL;
int ret = 0;
- PK("<1>in pwm_ioctl ----\n");
+ pr_debug("pwm_ioctl ----\n");
switch(cmd)
{
+ // Set PWM Mode (Tone or Playback)
case PWM_IOC_SMODE:
{
gPwmMode = arg;
if (gPwmMode == PWM_TONE_MODE)
{
- // create periodic timer when tone mode
- PK("PWM Tone Mode.\n");
- pwmTimer.timer_blk_ptr = &timer_blk;
- pwmTimer.timer_func = pwmIntFunc;
- CreateTimer(&pwmTimer);
+ // create periodic timer when tone mode
+ pr_debug("PWM Tone Mode.\n");
+ pwmTimer.timer_blk_ptr = &timer_blk;
+ pwmTimer.timer_func = pwmIntFunc;
+ CreateTimer(&pwmTimer);
}
else
{
- PK("PWM Play Mode.\n");
+ pr_debug("PWM Play Mode.\n");
}
}
break;
+ // Set Playback frequency/ouput rate
case PWM_IOC_SFREQ:
{
- PWMC &= ~0x00000010; // Disable PWM
-
- PWMC &= 0xFFFF00F0; // sysclk
-
+ PWMC &= ~PWMC_EN; // Disable PWM
+ PWMC &= ~PWMC_CLKSRC; // Select 16MHz PERCLK1 as CLK source
+ PWMC &= ~PWMC_PRESCALER_MASK; // PRESCALER = 0 => use full 16MHz
- // check sampling rate
- if (arg == PWM_SAMPLING_8KHZ)
+ switch(arg)
{
- // 96M / 23/2/256 = 8.152kHz
- // PWMC |= (0 << 8); // pres = 22 (/23)
- PWMC |= 0x00000900; // pres = 15 (/16) // 66M / 16/2/256 = 8.057KHZ
+ case PWM_SAMPLING_32KHZ:
+ PWMC &= ~PWMC_REPEAT_MASK; // REPEAT = 0 => divide by 1
+ PWMC &= ~PWMC_CLKSEL_MASK; // CLKSEL = 0 => divide by 2
+ // 16MHz/256/1/2 = 32768
+ str = "32Khz";
+ break;
+ case PWM_SAMPLING_16KHZ:
+ PWMC &= ~PWMC_REPEAT_MASK;
+ PWMC |= PWMC_REPEAT(1); // REPEAT = 01 => divide by 2
+ PWMC &= ~PWMC_CLKSEL_MASK; // CLKSEL = 0 => divide by 2
+ // 16MHz/256/2/2 = 16384
+ str = "16Khz";
+ break;
+ case PWM_SAMPLING_8KHZ:
+ default:
+ PWMC &= ~PWMC_REPEAT_MASK;
+ PWMC |= PWMC_REPEAT(2); // REPEAT = 10 => divide by 4
+ PWMC &= ~PWMC_CLKSEL_MASK; // CLKSEL = 0 => divide by 2
+ // 16MHz/256/4/2 = 8192
str = "8Khz";
+ break;
}
-
- else if (arg == PWM_SAMPLING_16KHZ)
- {
- PWMC |= (0 << 8); // pres = 11 (/12))
- str = "16Khz";
- }
-
- PWMC &= ~0x3; // clksel = 0 (/2)
-
- PK("<2>Sample rate = %s\n", str);
- PK("<1>ioctl: PWMC = 0x%8x\n", PWMC);
+ pr_debug("Sample rate = %s\n", str);
+ pr_debug("ioctl: PWMC = 0x%8x\n", PWMC);
}
break;
+ // Set samples length (8 or 16 bits)
case PWM_IOC_SDATALEN:
{
gDataLen = arg;
- if (arg == PWM_DATA_8BIT)
+ if( arg == PWM_DATA_8BIT )
{
- PWMP = 0xfe; // Period, 8bit
- str = "8bit";
+ PWMP = 0xfe; // Period, 8bit
+ str = "8bit";
}
else // if(arg == PWM_DATA_16BIT)
{
- PWMP = 0xfffe; // Period, 16bit
- str = "16bit";
+ PWMP = 0xfffe; // Period, 16bit
+ str = "16bit";
}
- PK("<2>Data Length = %s\n", str);
+ pr_debug("Data Length = %s\n", str);
}
break;
case PWM_IOC_SSAMPLE:
- gSampleValue = arg;
- break;
+ gSampleValue = arg;
+ break;
case PWM_IOC_SPERIOD:
- if (gPwmMode == PWM_TONE_MODE)
- {
- PK("<1>PWM period = %d\n",(int)arg);
- pwmTimer.period = arg/12;
- }
- break;
+ if (gPwmMode == PWM_TONE_MODE)
+ {
+ PK("<1>PWM period = %d\n",(int)arg);
+ pwmTimer.period = arg/12;
+ }
+ break;
case PWM_IOC_STOP:
- StopPwm();
- break;
+ StopPwm();
+ break;
-/*add--001begin*/
case PWM_IOC_SWAPDATA:
- if (arg&PWM_SWAP_HCTRL) //Halfword FIFO data swapping
- {
- PWMC |= PWM_SWAP_HCTRL;
- }
- else
- {
- PWMC &= ~PWM_SWAP_HCTRL;
- }
+ if (arg&PWM_SWAP_HCTRL) //Halfword FIFO data swapping
+ {
+ PWMC |= PWMC_HCTR;
+ }
+ else
+ {
+ PWMC &= ~PWMC_HCTR;
+ }
- if (arg&PWM_SWAP_BCTRL) //Byte FIFO data swapping
- {
- PWMC |= PWM_SWAP_BCTRL;
- }
- else
- {
- PWMC &= ~PWM_SWAP_BCTRL;
- }
-
+ if (arg&PWM_SWAP_BCTRL) //Byte FIFO data swapping
+ {
+ PWMC |= PWMC_BCTR;
+ }
+ else
+ {
+ PWMC &= ~PWMC_BCTR;
+ }
break;
-/*add--001end*/
default:
+ printk( DRIVER_NAME ": unkown IOCTL\n");
break;
}
- PK("<1>out pwm_ioctl ----\n");
return ret;
}
/******************************************************************************
- * Function Name: pwm_read
+ * Called from user space read()
*
- * Input: filp : the file
- * buf : data buffer
- * count : number of chars to be readed
- * l : offset of file
- * Value Returned: int : Return status.If no error, return 0.
- *
- * Description: read device driver
- *
- * Modification History:
- * 10 DEC,2001,
*****************************************************************************/
ssize_t pwm_read(struct file * filp, char * buf, size_t count, loff_t * l)
{
- int ret;
+ int ret = 0;
- if(gWriteCnt == 0)
+ if( PWMC & PWMC_IRQEN )
ret = 1; // no data
else
ret = 0; // processing data
- printk("pwm_read ----\n");
+ pr_debug("pwm_read ----\n");
return ret;
}
-static ssize_t pwm_write(struct file *filp,const char *buf,size_t count,loff_t *f_pos)
+/******************************************************************************
+ * Called from user space write()
+ *
+ *****************************************************************************/
+static ssize_t pwm_write( struct file *filp, const char *buf, size_t count, loff_t *f_pos )
{
int ret = 0;
+ int remaining_space = 0;
- PK("<1>in pwm_write ----\n");
+ pr_debug( "pwm_write ----\n" );
- gWriteOk = 0;
-
- gpWriteBuf = kmalloc(count, GFP_KERNEL);
- if (!gpWriteBuf)
+ if( count > MAX_SOUND_BUFFER_SIZE )
+ count = MAX_SOUND_BUFFER_SIZE;
+ // First time, allocate the double buffer
+ if( !gPWM_Circ_Buf.buf ) {
+ gPWM_Circ_Buf.buf = kmalloc( count*2, GFP_KERNEL );
+ if( !gPWM_Circ_Buf.buf ) {
goto out;
- gpWriteBufPtr8 = gpWriteBuf;
+ } else {
+ // Initialize circular buffer
+ gPWM_Circ_Buf.read = 0;
+ gPWM_Circ_Buf.write = 0;
+ gPWM_Circ_Buf.size = MAX_SOUND_BUFFER_SIZE*2;
+ }
+ }
- if (copy_from_user(gpWriteBuf, buf, count))
- {
- ret = -EFAULT;
- goto out;
+ // If there is enough space at the end of the buffer for all data in one copy, do it
+ remaining_space = gPWM_Circ_Buf.size - gPWM_Circ_Buf.write;
+ pr_debug("Remaining space to end: %d, must write: %d \n", remaining_space, count);
+ if( remaining_space >= count ) {
+ // Get data from UserSpace
+ if( copy_from_user( gPWM_Circ_Buf.buf + gPWM_Circ_Buf.write , buf, count ) ) {
+ ret = -EFAULT; goto out;
+ }
+ increase_circbuf( &gPWM_Circ_Buf, count );
+ // if not enough space, then
+ } else {
+ // Do it in 2 times
+ if( copy_from_user( gPWM_Circ_Buf.buf + gPWM_Circ_Buf.write, buf, remaining_space ) ) {
+ ret = -EFAULT; goto out;
+ }
+ increase_circbuf( &gPWM_Circ_Buf, remaining_space );
+ if( copy_from_user( gPWM_Circ_Buf.buf + gPWM_Circ_Buf.write, buf, count - remaining_space ) ) {
+ ret = -EFAULT; goto out;
+ }
+ increase_circbuf( &gPWM_Circ_Buf, count - remaining_space );
}
- //write data to PWM
- gWriteCnt = count;
- PK("<1>pwm_write: count = %d\n", gWriteCnt);
+ // Enable PWM
+ PWMC |= PWMC_EN; PWMS = 0x00000000;
- //enable IRQEN, PW
- PWMC |= 0x00000010;
-
- PWMS = 0x00000000;
-
- if(gPwmMode == PWM_PLAY_MODE)
+ if( gPwmMode == PWM_PLAY_MODE )
{
-// PK("before set IRQEN\n");
- PWMC |= 0x00000040;
- PK("PWMC1= 0x%08x\n", PWMC);
-// PWMS = 0x00000000;
+ PWMC |= PWMC_IRQEN; // Enable IRQ
}
else
{
PWMS = gSampleValue;
PWMC |= 0x7f00; // set prescaler to 128
- gpWriteBufPtr16 = (u16*)gpWriteBuf;
-
+/* gpWriteBufPtr16 = (u16*)gpWriteBuf;
gWriteCnt /= 2; //input size is 8bit size, need /2 to get 16bit size
+ StartTimer( &pwmTimer );*/
+ }
- StartTimer(&pwmTimer);
+ // Calculate how much space is left in buffer
+ remaining_space = CIRC_SPACE( gPWM_Circ_Buf.write, gPWM_Circ_Buf.read, gPWM_Circ_Buf.size );
+ pr_debug("Space left: %d\n", remaining_space);
+ if( remaining_space < count ) {
+ // Pauses user app until interrupt handler has consumed some data
+ interruptible_sleep_on( &write_wait );
}
- PK("<1>pwm_write: PWMC = 0x%8x\n", PWMC);
-
out:
-
- PK("<1>out pwm_write ----\n");
- return ret;
+ pr_debug( "out pwm_write PWMC = 0x%8x ----\n", PWMC );
+ return count;
}
@@ -818,8 +831,6 @@
return size;
}
-
-
/**
* pwm_show_frequency - return current frequency setting
* @dev: device to work with
@@ -906,7 +917,7 @@
ppd->active=0;
setup_pwm_unit(ppd);
-
+
return size;
}
@@ -989,40 +1000,70 @@
}
/*
- * PWM interrupt handler
+ * PWM interrupt handler (used in Play Mode only)
*/
static irqreturn_t pwm_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
- u16 tmp16;
u32 status;
+ int remaining = 0;
- // clear status
+ // Acknowledge interrupt
status = PWMC;
- // check end
- if(gWriteCnt < 0)
+ remaining = CIRC_CNT( gPWM_Circ_Buf.write, gPWM_Circ_Buf.read, gPWM_Circ_Buf.size );
+ if( remaining <= 1024 && remaining > 1021 ) { // TODO make it better (I think a test each consumed sample is the only accurate solution
+ // Can accept new data now
+ wake_up_interruptible( &write_wait );
+ }
+
+ // End of sound buffer
+ if( remaining < 3 )
{
+ if(gDataLen == PWM_DATA_8BIT)
+ {
+ while( remaining )
+ {
+ PWMS = (u32)(get_byte_from_circbuf( &gPWM_Circ_Buf ));
+ /*PK("<1>(%d) pwm_int: PWMS = 0x%8x\n", gWriteCnt, PWMS);*/
+ remaining--;
+ }
+ }
+ else // if(gDataLen == PWM_DATA_16BIT) // one comparaison is enough
+ {
+ while( remaining )
+ {
+ PWMS = (u32)(get_word_from_circbuf( &gPWM_Circ_Buf ));
+ //PK("<1>(%d) pwm_int: PWMS = 0x%8x\n", gWriteCnt, PWMS);
+ remaining--;
+ }
+ }
+
StopPwm();
goto end;
}
- if (gPwmMode == PWM_PLAY_MODE)
+ // Put sound samples in FIFO
+ if(gDataLen == PWM_DATA_8BIT)
{
- if(gDataLen == PWM_DATA_8BIT)
+ PWMS = (u32)(get_byte_from_circbuf( &gPWM_Circ_Buf ));
+ PWMS = (u32)(get_byte_from_circbuf( &gPWM_Circ_Buf ));
+ PWMS = (u32)(get_byte_from_circbuf( &gPWM_Circ_Buf ));
+ if (PWMC & PWMC_FIFOAV) // TODO: verify if needed
{
- PWMS = (u32)(*gpWriteBufPtr8++);
- PK("<1>(%d) pwm_int: PWMS = 0x%8x\n", gWriteCnt, PWMS);
-
- gWriteCnt--;
+ PWMS = (u32)(get_byte_from_circbuf( &gPWM_Circ_Buf ));
+ g4bytes++;
}
- else if(gDataLen == PWM_DATA_16BIT)
+ }
+ else // if(gDataLen == PWM_DATA_16BIT) // one comparaison is enough
+ {
+ // TODO: put good value in PWMC_BCTR to auto swap bytes if needed (do it at write or ioctl)
+ PWMS = (u32)(get_word_from_circbuf( &gPWM_Circ_Buf ));
+ PWMS = (u32)(get_word_from_circbuf( &gPWM_Circ_Buf ));
+ PWMS = (u32)(get_word_from_circbuf( &gPWM_Circ_Buf ));
+ if (PWMC & PWMC_FIFOAV) // TODO: verify if needed
{
- tmp16 = *gpWriteBufPtr8++;
- tmp16 |= (*gpWriteBufPtr8++ << 8);
- PWMS = (u32)tmp16;
- PK("<1>(%d) pwm_int: PWMS = 0x%8x\n", gWriteCnt, PWMS);
-
- gWriteCnt -= 2;
+ PWMS = (u32)(get_word_from_circbuf( &gPWM_Circ_Buf ));
+ g4bytes++;
}
}
@@ -1060,13 +1101,15 @@
}
// init wait queue
- init_waitqueue_head(&ts_wait);
+ init_waitqueue_head(&write_wait);
+ init_waitqueue_head(&exit_wait);
+ pr_debug("Wait queues initialized\n");
// init PWM hardware module
initPWM();
printk("PWM driver v" DRIVER_VERSION "\n");
-
+
end:
return( result );
}
@@ -1090,7 +1133,7 @@
printk(KERN_INFO " Initializing PWM#%u...",pdev->id);
switch( pdev->id )
- {
+ {
// PWM0
case 0:
// Check if GPIO was initialized ??
@@ -1109,9 +1152,8 @@
err = -EBUSY;
goto exit;
}
-
pwm_init_from_probe();
-
+
// Create /sys stuf
if (unlikely((err=init_userinterface(pdev,res->start))))
goto release;
@@ -1214,7 +1256,6 @@
};
-
/*
* Called when module is insmoded
*/
@@ -1254,7 +1295,7 @@
*/
void __exit imx_pwm_exit(void)
{
- disable_irq( PWM_INT ); // should be done before free_irq non ?
+ disable_irq( PWM_INT ); // should be done before free_irq no ?
free_irq( PWM_INT, DEV_IRQ_ID );
unregister_chrdev( gMajor, DRIVER_NAME );
@@ -1268,7 +1309,7 @@
module_init(imx_pwm_init);
module_exit(imx_pwm_exit);
-MODULE_AUTHOR("Julien Boibessot, inspired by a lot of other PWM drivers");
+MODULE_AUTHOR("Julien Boibessot & Sebastien Royen, inspired by a lot of other PWM drivers");
MODULE_DESCRIPTION("Armadeus PWM driver");
MODULE_LICENSE("GPL");
Added: trunk/target/linux/modules/pwm/test/Chimes.raw
===================================================================
--- trunk/target/linux/modules/pwm/test/Chimes.raw (rev 0)
+++ trunk/target/linux/modules/pwm/test/Chimes.raw 2007-04-15 09:23:57 UTC (rev 583)
@@ -0,0 +1 @@
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\ No newline at end of file
Added: trunk/target/linux/modules/pwm/test/KDE_Startup_2.raw
===================================================================
--- trunk/target/linux/modules/pwm/test/KDE_Startup_2.raw (rev 0)
+++ trunk/target/linux/modules/pwm/test/KDE_Startup_2.raw 2007-04-15 09:23:57 UTC (rev 583)
@@ -0,0 +1 @@
@@ Diff output truncated at 100000 characters. @@
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