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pisound: Added reading Pisound board hardware revision and exposing it #3425

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merged 3 commits into from
Jan 28, 2020
Merged

pisound: Added reading Pisound board hardware revision and exposing it #3425

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952ae71
pisound: Added reading Pisound board hardware revision and exposing i…
gtrainavicius Jan 24, 2020
03d1488
pisound: Ensure info strings are definitely NULL terminated
gtrainavicius Jan 28, 2020
c5a5348
pisound: Simplified Pisound's sysfs info string getters
gtrainavicius Jan 28, 2020
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72 changes: 55 additions & 17 deletions sound/soc/bcm/pisound.c
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Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,8 @@ static void pisnd_spi_set_callback(pisnd_spi_recv_cb cb, void *data);

static const char *pisnd_spi_get_serial(void);
static const char *pisnd_spi_get_id(void);
static const char *pisnd_spi_get_version(void);
static const char *pisnd_spi_get_fw_version(void);
static const char *pisnd_spi_get_hw_version(void);

static int pisnd_midi_init(struct snd_card *card);
static void pisnd_midi_uninit(void);
Expand Down Expand Up @@ -222,7 +223,9 @@ static pisnd_spi_recv_cb g_recvCallback;

static char g_serial_num[11];
static char g_id[25];
static char g_version[5];
enum { MAX_VERSION_STR_LEN = 6 };
static char g_fw_version[MAX_VERSION_STR_LEN];
static char g_hw_version[MAX_VERSION_STR_LEN];

static uint8_t g_ledFlashDuration;
static bool g_ledFlashDurationChanged;
Expand Down Expand Up @@ -558,7 +561,8 @@ static int spi_read_info(void)
char *p;

memset(g_serial_num, 0, sizeof(g_serial_num));
memset(g_version, 0, sizeof(g_version));
memset(g_fw_version, 0, sizeof(g_fw_version));
strcpy(g_hw_version, "1.0"); // Assume 1.0 hw version.
memset(g_id, 0, sizeof(g_id));

tmp = spi_transfer16(0);
Expand All @@ -581,13 +585,25 @@ static int spi_read_info(void)
return -EINVAL;

snprintf(
g_version,
sizeof(g_version),
g_fw_version,
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MAX_VERSION_STR_LEN,
"%x.%02x",
buffer[0],
buffer[1]
);
break;
case 3:
if (n != 2)
return -EINVAL;

snprintf(
g_hw_version,
MAX_VERSION_STR_LEN,
"%x.%x",
buffer[0],
buffer[1]
);
break;
case 1:
if (n >= sizeof(g_serial_num))
return -EINVAL;
Expand Down Expand Up @@ -619,7 +635,8 @@ static int pisnd_spi_init(struct device *dev)

memset(g_serial_num, 0, sizeof(g_serial_num));
memset(g_id, 0, sizeof(g_id));
memset(g_version, 0, sizeof(g_version));
memset(g_fw_version, 0, sizeof(g_fw_version));
memset(g_hw_version, 0, sizeof(g_hw_version));

spi = pisnd_spi_find_device();

Expand Down Expand Up @@ -743,10 +760,18 @@ static const char *pisnd_spi_get_id(void)
return "";
}

static const char *pisnd_spi_get_version(void)
static const char *pisnd_spi_get_fw_version(void)
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{
if (strlen(g_version))
return g_version;
if (strlen(g_fw_version))
return g_fw_version;

return "";
}

static const char *pisnd_spi_get_hw_version(void)
{
if (strlen(g_hw_version))
return g_hw_version;

return "";
}
Expand Down Expand Up @@ -1054,13 +1079,22 @@ static ssize_t pisnd_id_show(
return sprintf(buf, "%s\n", pisnd_spi_get_id());
}

static ssize_t pisnd_version_show(
static ssize_t pisnd_fw_version_show(
struct kobject *kobj,
struct kobj_attribute *attr,
char *buf
)
{
return sprintf(buf, "%s\n", pisnd_spi_get_version());
return sprintf(buf, "%s\n", pisnd_spi_get_fw_version());
}

static ssize_t pisnd_hw_version_show(
struct kobject *kobj,
struct kobj_attribute *attr,
char *buf
)
{
return sprintf(buf, "%s\n", pisnd_spi_get_hw_version());
}

static ssize_t pisnd_led_store(
Expand All @@ -1085,15 +1119,18 @@ static struct kobj_attribute pisnd_serial_attribute =
__ATTR(serial, 0444, pisnd_serial_show, NULL);
static struct kobj_attribute pisnd_id_attribute =
__ATTR(id, 0444, pisnd_id_show, NULL);
static struct kobj_attribute pisnd_version_attribute =
__ATTR(version, 0444, pisnd_version_show, NULL);
static struct kobj_attribute pisnd_fw_version_attribute =
__ATTR(version, 0444, pisnd_fw_version_show, NULL);
static struct kobj_attribute pisnd_hw_version_attribute =
__ATTR(hw_version, 0444, pisnd_hw_version_show, NULL);
static struct kobj_attribute pisnd_led_attribute =
__ATTR(led, 0644, NULL, pisnd_led_store);

static struct attribute *attrs[] = {
&pisnd_serial_attribute.attr,
&pisnd_id_attribute.attr,
&pisnd_version_attribute.attr,
&pisnd_fw_version_attribute.attr,
&pisnd_hw_version_attribute.attr,
&pisnd_led_attribute.attr,
NULL
};
Expand All @@ -1112,9 +1149,10 @@ static int pisnd_probe(struct platform_device *pdev)
}

printi("Detected Pisound card:\n");
printi("\tSerial: %s\n", pisnd_spi_get_serial());
printi("\tVersion: %s\n", pisnd_spi_get_version());
printi("\tId: %s\n", pisnd_spi_get_id());
printi("\tSerial: %s\n", pisnd_spi_get_serial());
printi("\tFirmware Version: %s\n", pisnd_spi_get_fw_version());
printi("\tHardware Version: %s\n", pisnd_spi_get_hw_version());
printi("\tId: %s\n", pisnd_spi_get_id());

pisnd_kobj = kobject_create_and_add("pisound", kernel_kobj);
if (!pisnd_kobj) {
Expand Down