#define SPI_PRINTK(x, l, f, a...) dev_printk(l, &(x)->dev, f , ##a)
-#define SPI_NUM_ATTRS 10 /* increase this if you add attributes */
+#define SPI_NUM_ATTRS 13 /* increase this if you add attributes */
#define SPI_OTHER_ATTRS 1 /* Increase this if you add "always
* on" attributes */
#define SPI_HOST_ATTRS 1
struct scsi_target *starget = to_scsi_target(dev);
spi_period(starget) = -1; /* illegal value */
+ spi_min_period(starget) = 0;
spi_offset(starget) = 0; /* async */
+ spi_max_offset(starget) = 255;
spi_width(starget) = 0; /* narrow */
+ spi_max_width(starget) = 1;
spi_iu(starget) = 0; /* no IU */
spi_dt(starget) = 0; /* ST */
spi_qas(starget) = 0;
return 0;
}
+#define spi_transport_show_simple(field, format_string) \
+ \
+static ssize_t \
+show_spi_transport_##field(struct class_device *cdev, char *buf) \
+{ \
+ struct scsi_target *starget = transport_class_to_starget(cdev); \
+ struct spi_transport_attrs *tp; \
+ \
+ tp = (struct spi_transport_attrs *)&starget->starget_data; \
+ return snprintf(buf, 20, format_string, tp->field); \
+}
+
+#define spi_transport_store_simple(field, format_string) \
+ \
+static ssize_t \
+store_spi_transport_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ int val; \
+ struct scsi_target *starget = transport_class_to_starget(cdev); \
+ struct spi_transport_attrs *tp; \
+ \
+ tp = (struct spi_transport_attrs *)&starget->starget_data; \
+ val = simple_strtoul(buf, NULL, 0); \
+ tp->field = val; \
+ return count; \
+}
+
#define spi_transport_show_function(field, format_string) \
\
static ssize_t \
struct spi_internal *i = to_spi_internal(shost->transportt); \
\
val = simple_strtoul(buf, NULL, 0); \
+ i->f->set_##field(starget, val); \
+ return count; \
+}
+
+#define spi_transport_store_max(field, format_string) \
+static ssize_t \
+store_spi_transport_##field(struct class_device *cdev, const char *buf, \
+ size_t count) \
+{ \
+ int val; \
+ struct scsi_target *starget = transport_class_to_starget(cdev); \
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
+ struct spi_internal *i = to_spi_internal(shost->transportt); \
+ struct spi_transport_attrs *tp \
+ = (struct spi_transport_attrs *)&starget->starget_data; \
+ \
+ val = simple_strtoul(buf, NULL, 0); \
+ if (val > tp->max_##field) \
+ val = tp->max_##field; \
i->f->set_##field(starget, val); \
return count; \
}
show_spi_transport_##field, \
store_spi_transport_##field);
+#define spi_transport_simple_attr(field, format_string) \
+ spi_transport_show_simple(field, format_string) \
+ spi_transport_store_simple(field, format_string) \
+static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \
+ show_spi_transport_##field, \
+ store_spi_transport_##field);
+
+#define spi_transport_max_attr(field, format_string) \
+ spi_transport_show_function(field, format_string) \
+ spi_transport_store_max(field, format_string) \
+ spi_transport_simple_attr(max_##field, format_string) \
+static CLASS_DEVICE_ATTR(field, S_IRUGO | S_IWUSR, \
+ show_spi_transport_##field, \
+ store_spi_transport_##field);
+
/* The Parallel SCSI Tranport Attributes: */
-spi_transport_rd_attr(offset, "%d\n");
-spi_transport_rd_attr(width, "%d\n");
+spi_transport_max_attr(offset, "%d\n");
+spi_transport_max_attr(width, "%d\n");
spi_transport_rd_attr(iu, "%d\n");
spi_transport_rd_attr(dt, "%d\n");
spi_transport_rd_attr(qas, "%d\n");
spi_transport_rd_attr(rti, "%d\n");
spi_transport_rd_attr(pcomp_en, "%d\n");
+/* we only care about the first child device so we return 1 */
+static int child_iter(struct device *dev, void *data)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+
+ spi_dv_device(sdev);
+ return 1;
+}
+
static ssize_t
store_spi_revalidate(struct class_device *cdev, const char *buf, size_t count)
{
struct scsi_target *starget = transport_class_to_starget(cdev);
- /* FIXME: we're relying on an awful lot of device internals
- * here. We really need a function to get the first available
- * child */
- struct device *dev = container_of(starget->dev.children.next, struct device, node);
- struct scsi_device *sdev = to_scsi_device(dev);
- spi_dv_device(sdev);
+ device_for_each_child(&starget->dev, NULL, child_iter);
return count;
}
static CLASS_DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate);
/* Translate the period into ns according to the current spec
* for SDTR/PPR messages */
-static ssize_t show_spi_transport_period(struct class_device *cdev, char *buf)
-
+static ssize_t
+show_spi_transport_period_helper(struct class_device *cdev, char *buf,
+ int period)
{
- struct scsi_target *starget = transport_class_to_starget(cdev);
- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
- struct spi_transport_attrs *tp;
int len, picosec;
- struct spi_internal *i = to_spi_internal(shost->transportt);
- tp = (struct spi_transport_attrs *)&starget->starget_data;
-
- if (i->f->get_period)
- i->f->get_period(starget);
-
- if (tp->period < 0 || tp->period > 0xff) {
+ if (period < 0 || period > 0xff) {
picosec = -1;
- } else if (tp->period <= SPI_STATIC_PPR) {
- picosec = ppr_to_ps[tp->period];
+ } else if (period <= SPI_STATIC_PPR) {
+ picosec = ppr_to_ps[period];
} else {
- picosec = tp->period * 4000;
+ picosec = period * 4000;
}
if (picosec == -1) {
}
static ssize_t
-store_spi_transport_period(struct class_device *cdev, const char *buf,
- size_t count)
+store_spi_transport_period_helper(struct class_device *cdev, const char *buf,
+ size_t count, int *periodp)
{
- struct scsi_target *starget = transport_class_to_starget(cdev);
- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
- struct spi_internal *i = to_spi_internal(shost->transportt);
int j, picosec, period = -1;
char *endp;
if (period > 0xff)
period = 0xff;
- i->f->set_period(starget, period);
+ *periodp = period;
return count;
}
+static ssize_t
+show_spi_transport_period(struct class_device *cdev, char *buf)
+{
+ struct scsi_target *starget = transport_class_to_starget(cdev);
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct spi_internal *i = to_spi_internal(shost->transportt);
+ struct spi_transport_attrs *tp =
+ (struct spi_transport_attrs *)&starget->starget_data;
+
+ if (i->f->get_period)
+ i->f->get_period(starget);
+
+ return show_spi_transport_period_helper(cdev, buf, tp->period);
+}
+
+static ssize_t
+store_spi_transport_period(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct scsi_target *starget = transport_class_to_starget(cdev);
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct spi_internal *i = to_spi_internal(shost->transportt);
+ struct spi_transport_attrs *tp =
+ (struct spi_transport_attrs *)&starget->starget_data;
+ int period, retval;
+
+ retval = store_spi_transport_period_helper(cdev, buf, count, &period);
+
+ if (period < tp->min_period)
+ period = tp->min_period;
+
+ i->f->set_period(starget, period);
+
+ return retval;
+}
+
static CLASS_DEVICE_ATTR(period, S_IRUGO | S_IWUSR,
show_spi_transport_period,
store_spi_transport_period);
+static ssize_t
+show_spi_transport_min_period(struct class_device *cdev, char *buf)
+{
+ struct scsi_target *starget = transport_class_to_starget(cdev);
+ struct spi_transport_attrs *tp =
+ (struct spi_transport_attrs *)&starget->starget_data;
+
+ return show_spi_transport_period_helper(cdev, buf, tp->min_period);
+}
+
+static ssize_t
+store_spi_transport_min_period(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct scsi_target *starget = transport_class_to_starget(cdev);
+ struct spi_transport_attrs *tp =
+ (struct spi_transport_attrs *)&starget->starget_data;
+
+ return store_spi_transport_period_helper(cdev, buf, count,
+ &tp->min_period);
+}
+
+
+static CLASS_DEVICE_ATTR(min_period, S_IRUGO | S_IWUSR,
+ show_spi_transport_min_period,
+ store_spi_transport_min_period);
+
+
static ssize_t show_spi_host_signalling(struct class_device *cdev, char *buf)
{
struct Scsi_Host *shost = transport_class_to_shost(cdev);
{
struct spi_internal *i = to_spi_internal(sreq->sr_host->transportt);
struct scsi_device *sdev = sreq->sr_device;
+ struct scsi_target *starget = sdev->sdev_target;
int period = 0, prevperiod = 0;
enum spi_compare_returns retval;
break;
/* OK, retrain, fallback */
+ if (i->f->get_iu)
+ i->f->get_iu(starget);
+ if (i->f->get_qas)
+ i->f->get_qas(starget);
if (i->f->get_period)
i->f->get_period(sdev->sdev_target);
- newperiod = spi_period(sdev->sdev_target);
- period = newperiod > period ? newperiod : period;
- if (period < 0x0d)
- period++;
- else
- period += period >> 1;
-
- if (unlikely(period > 0xff || period == prevperiod)) {
- /* Total failure; set to async and return */
- SPI_PRINTK(sdev->sdev_target, KERN_ERR, "Domain Validation Failure, dropping back to Asynchronous\n");
- DV_SET(offset, 0);
- return SPI_COMPARE_FAILURE;
+
+ /* Here's the fallback sequence; first try turning off
+ * IU, then QAS (if we can control them), then finally
+ * fall down the periods */
+ if (i->f->set_iu && spi_iu(starget)) {
+ SPI_PRINTK(starget, KERN_ERR, "Domain Validation Disabing Information Units\n");
+ DV_SET(iu, 0);
+ } else if (i->f->set_qas && spi_qas(starget)) {
+ SPI_PRINTK(starget, KERN_ERR, "Domain Validation Disabing Quick Arbitration and Selection\n");
+ DV_SET(qas, 0);
+ } else {
+ newperiod = spi_period(starget);
+ period = newperiod > period ? newperiod : period;
+ if (period < 0x0d)
+ period++;
+ else
+ period += period >> 1;
+
+ if (unlikely(period > 0xff || period == prevperiod)) {
+ /* Total failure; set to async and return */
+ SPI_PRINTK(starget, KERN_ERR, "Domain Validation Failure, dropping back to Asynchronous\n");
+ DV_SET(offset, 0);
+ return SPI_COMPARE_FAILURE;
+ }
+ SPI_PRINTK(starget, KERN_ERR, "Domain Validation detected failure, dropping back\n");
+ DV_SET(period, period);
+ prevperiod = period;
}
- SPI_PRINTK(sdev->sdev_target, KERN_ERR, "Domain Validation detected failure, dropping back\n");
- DV_SET(period, period);
- prevperiod = period;
}
return retval;
}
{
struct spi_internal *i = to_spi_internal(sreq->sr_host->transportt);
struct scsi_device *sdev = sreq->sr_device;
+ struct scsi_target *starget = sdev->sdev_target;
int len = sdev->inquiry_len;
/* first set us up for narrow async */
DV_SET(offset, 0);
if (spi_dv_device_compare_inquiry(sreq, buffer, buffer, DV_LOOPS)
!= SPI_COMPARE_SUCCESS) {
- SPI_PRINTK(sdev->sdev_target, KERN_ERR, "Domain Validation Initial Inquiry Failed\n");
+ SPI_PRINTK(starget, KERN_ERR, "Domain Validation Initial Inquiry Failed\n");
/* FIXME: should probably offline the device here? */
return;
}
/* test width */
- if (i->f->set_width && sdev->wdtr) {
- i->f->set_width(sdev->sdev_target, 1);
+ if (i->f->set_width && spi_max_width(starget) &&
+ scsi_device_wide(sdev)) {
+ i->f->set_width(starget, 1);
if (spi_dv_device_compare_inquiry(sreq, buffer,
buffer + len,
DV_LOOPS)
!= SPI_COMPARE_SUCCESS) {
- SPI_PRINTK(sdev->sdev_target, KERN_ERR, "Wide Transfers Fail\n");
- i->f->set_width(sdev->sdev_target, 0);
+ SPI_PRINTK(starget, KERN_ERR, "Wide Transfers Fail\n");
+ i->f->set_width(starget, 0);
}
}
return;
/* device can't handle synchronous */
- if(!sdev->ppr && !sdev->sdtr)
+ if (!scsi_device_sync(sdev) && !scsi_device_dt(sdev))
return;
/* see if the device has an echo buffer. If it does we can
* do the SPI pattern write tests */
len = 0;
- if (sdev->ppr)
+ if (scsi_device_dt(sdev))
len = spi_dv_device_get_echo_buffer(sreq, buffer);
retry:
/* now set up to the maximum */
- DV_SET(offset, 255);
- DV_SET(period, 1);
+ DV_SET(offset, spi_max_offset(starget));
+ DV_SET(period, spi_min_period(starget));
+ /* try QAS requests; this should be harmless to set if the
+ * target supports it */
+ if (scsi_device_qas(sdev))
+ DV_SET(qas, 1);
+ /* Also try IU transfers */
+ if (scsi_device_ius(sdev))
+ DV_SET(iu, 1);
+ if (spi_min_period(starget) < 9) {
+ /* This u320 (or u640). Ignore the coupled parameters
+ * like DT and IU, but set the optional ones */
+ DV_SET(rd_strm, 1);
+ DV_SET(wr_flow, 1);
+ DV_SET(rti, 1);
+ if (spi_min_period(starget) == 8)
+ DV_SET(pcomp_en, 1);
+ }
if (len == 0) {
- SPI_PRINTK(sdev->sdev_target, KERN_INFO, "Domain Validation skipping write tests\n");
+ SPI_PRINTK(starget, KERN_INFO, "Domain Validation skipping write tests\n");
spi_dv_retrain(sreq, buffer, buffer + len,
spi_dv_device_compare_inquiry);
return;
}
if (len > SPI_MAX_ECHO_BUFFER_SIZE) {
- SPI_PRINTK(sdev->sdev_target, KERN_WARNING, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE);
+ SPI_PRINTK(starget, KERN_WARNING, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE);
len = SPI_MAX_ECHO_BUFFER_SIZE;
}
if (i->f->show_##field) \
count++
+#define SETUP_RELATED_ATTRIBUTE(field, rel_field) \
+ i->private_attrs[count] = class_device_attr_##field; \
+ if (!i->f->set_##rel_field) { \
+ i->private_attrs[count].attr.mode = S_IRUGO; \
+ i->private_attrs[count].store = NULL; \
+ } \
+ i->attrs[count] = &i->private_attrs[count]; \
+ if (i->f->show_##rel_field) \
+ count++
+
#define SETUP_HOST_ATTRIBUTE(field) \
i->private_host_attrs[count] = class_device_attr_##field; \
if (!i->f->set_##field) { \
i->f = ft;
SETUP_ATTRIBUTE(period);
+ SETUP_RELATED_ATTRIBUTE(min_period, period);
SETUP_ATTRIBUTE(offset);
+ SETUP_RELATED_ATTRIBUTE(max_offset, offset);
SETUP_ATTRIBUTE(width);
+ SETUP_RELATED_ATTRIBUTE(max_width, width);
SETUP_ATTRIBUTE(iu);
SETUP_ATTRIBUTE(dt);
SETUP_ATTRIBUTE(qas);
git.openpandora.org / pandora-kernel.git / blobdiff