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FMC ADC 100M 14b 4cha - Software
Commit 854994a7 authored by Federico Vaga's avatar Federico Vaga
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drv: read pattern data from debugfs 

Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent 3d1f99de
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Showing with 56 additions and 2 deletions
kernel/fa-core.c
View file @ 854994a7
......@@ -294,6 +294,34 @@ err:
return err;
}
/**
* Get current status for data pattern
* @fa The ADC device instance
* @pattern the pattern data to get from the ADC
* @enable 0 to disable, 1 to enable
*/
int fa_adc_data_pattern_get(struct fa_dev *fa, uint16_t *pattern,
unsigned int *enable)
{
uint32_t tx, rx;
int err;
tx = 0x8000 | (3 << 8);
err = fa_spi_xfer(fa, FA_SPI_SS_ADC, 16, tx, &rx);
if (err)
return err;
*enable = !!(rx & 0x80);
*pattern = ((rx & 0xF) << 8);
tx = 0x8000 | (4 << 8);
err = fa_spi_xfer(fa, FA_SPI_SS_ADC, 16, tx, &rx);
if (err)
return err;
*pattern |= (rx & 0xFF);
return 0;
}
/*
* zfad_fsm_command
* @fa: the fmc-adc descriptor
......
kernel/fa-debug.c
View file @ 854994a7
......@@ -227,10 +227,34 @@ static ssize_t fa_data_pattern_write(struct file *file, const char __user *buf,
}
}
static ssize_t fa_data_pattern_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct fa_dev *fa = file->private_data;
char buf_l[FA_ADC_DATA_PATTERN_CMD_SIZE];
uint16_t pattern;
unsigned int enable;
int err;
if (*ppos > 0)
return 0;
err = fa_adc_data_pattern_get(fa, &pattern, &enable);
if (err)
return err;
snprintf(buf_l, FA_ADC_DATA_PATTERN_CMD_SIZE, "adc %d 0x%02x\n",
enable, pattern);
count = min(count, strlen(buf_l));
err = copy_to_user(buf, buf_l, count);
*ppos += count;
return err ? err : count;
}
static const struct file_operations fa_data_pattern_ops = {
.owner = THIS_MODULE,
.open = simple_open,
.write = fa_data_pattern_write,
.read = fa_data_pattern_read,
};
int fa_debug_init(struct fa_dev *fa)
......@@ -274,7 +298,7 @@ int fa_debug_init(struct fa_dev *fa)
"Cannot create software trigger file\n");
}
fa->dbg_data_pattern = debugfs_create_file("data_pattern", 0200,
fa->dbg_data_pattern = debugfs_create_file("data_pattern", 0644,
fa->dbg_dir, fa,
&fa_data_pattern_ops);
if (IS_ERR_OR_NULL(fa->dbg_data_pattern)) {
......
kernel/fmc-adc-100m14b4cha.h
View file @ 854994a7
......@@ -614,7 +614,9 @@ extern int fa_fsm_wait_state(struct fa_dev *fa,
enum fa100m14b4c_fsm_state state,
unsigned int timeout_us);
extern int fa_adc_data_pattern_set(struct fa_dev *fa, uint16_t pattern,
unsigned int enable);
unsigned int enable);
extern int fa_adc_data_pattern_get(struct fa_dev *fa, uint16_t *pattern,
unsigned int *enable);
/* Temporarily, user values are the same as hardware values */
extern int zfad_convert_user_range(uint32_t user_val);
......
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