[PATCH 291/368] Staging: vme: Add location monitor support for ca91cx42
Greg KH
greg at kroah.com
Thu Mar 4 20:07:49 UTC 2010
From: Martyn Welch <martyn.welch at ge.com>
Signed-off-by: Martyn Welch <martyn.welch at ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at suse.de>
---
drivers/staging/vme/TODO | 1 -
drivers/staging/vme/bridges/vme_ca91cx42.c | 272 ++++++++++++++++++++--------
drivers/staging/vme/bridges/vme_ca91cx42.h | 13 ++
3 files changed, 213 insertions(+), 73 deletions(-)
diff --git a/drivers/staging/vme/TODO b/drivers/staging/vme/TODO
index 00c0ddc..723b67b 100644
--- a/drivers/staging/vme/TODO
+++ b/drivers/staging/vme/TODO
@@ -58,7 +58,6 @@ Universe II (ca91c142)
- DMA unsupported.
- RMW transactions unsupported.
-- Location Monitors unsupported.
- Mailboxes unsupported.
- Error Detection.
- Control of prefetch size, threshold.
diff --git a/drivers/staging/vme/bridges/vme_ca91cx42.c b/drivers/staging/vme/bridges/vme_ca91cx42.c
index ae2f69c..aeb11d5 100644
--- a/drivers/staging/vme/bridges/vme_ca91cx42.c
+++ b/drivers/staging/vme/bridges/vme_ca91cx42.c
@@ -899,6 +899,206 @@ ssize_t ca91cx42_master_write(struct vme_master_resource *image, void *buf,
return retval;
}
+/*
+ * All 4 location monitors reside at the same base - this is therefore a
+ * system wide configuration.
+ *
+ * This does not enable the LM monitor - that should be done when the first
+ * callback is attached and disabled when the last callback is removed.
+ */
+int ca91cx42_lm_set(struct vme_lm_resource *lm, unsigned long long lm_base,
+ vme_address_t aspace, vme_cycle_t cycle)
+{
+ u32 temp_base, lm_ctl = 0;
+ int i;
+ struct ca91cx42_driver *bridge;
+ struct device *dev;
+
+ bridge = lm->parent->driver_priv;
+ dev = lm->parent->parent;
+
+ /* Check the alignment of the location monitor */
+ temp_base = (u32)lm_base;
+ if (temp_base & 0xffff) {
+ dev_err(dev, "Location monitor must be aligned to 64KB "
+ "boundary");
+ return -EINVAL;
+ }
+
+ mutex_lock(&(lm->mtx));
+
+ /* If we already have a callback attached, we can't move it! */
+ for (i = 0; i < lm->monitors; i++) {
+ if (bridge->lm_callback[i] != NULL) {
+ mutex_unlock(&(lm->mtx));
+ dev_err(dev, "Location monitor callback attached, "
+ "can't reset\n");
+ return -EBUSY;
+ }
+ }
+
+ switch (aspace) {
+ case VME_A16:
+ lm_ctl |= CA91CX42_LM_CTL_AS_A16;
+ break;
+ case VME_A24:
+ lm_ctl |= CA91CX42_LM_CTL_AS_A24;
+ break;
+ case VME_A32:
+ lm_ctl |= CA91CX42_LM_CTL_AS_A32;
+ break;
+ default:
+ mutex_unlock(&(lm->mtx));
+ dev_err(dev, "Invalid address space\n");
+ return -EINVAL;
+ break;
+ }
+
+ if (cycle & VME_SUPER)
+ lm_ctl |= CA91CX42_LM_CTL_SUPR;
+ if (cycle & VME_USER)
+ lm_ctl |= CA91CX42_LM_CTL_NPRIV;
+ if (cycle & VME_PROG)
+ lm_ctl |= CA91CX42_LM_CTL_PGM;
+ if (cycle & VME_DATA)
+ lm_ctl |= CA91CX42_LM_CTL_DATA;
+
+ iowrite32(lm_base, bridge->base + LM_BS);
+ iowrite32(lm_ctl, bridge->base + LM_CTL);
+
+ mutex_unlock(&(lm->mtx));
+
+ return 0;
+}
+
+/* Get configuration of the callback monitor and return whether it is enabled
+ * or disabled.
+ */
+int ca91cx42_lm_get(struct vme_lm_resource *lm, unsigned long long *lm_base,
+ vme_address_t *aspace, vme_cycle_t *cycle)
+{
+ u32 lm_ctl, enabled = 0;
+ struct ca91cx42_driver *bridge;
+
+ bridge = lm->parent->driver_priv;
+
+ mutex_lock(&(lm->mtx));
+
+ *lm_base = (unsigned long long)ioread32(bridge->base + LM_BS);
+ lm_ctl = ioread32(bridge->base + LM_CTL);
+
+ if (lm_ctl & CA91CX42_LM_CTL_EN)
+ enabled = 1;
+
+ if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A16)
+ *aspace = VME_A16;
+ if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A24)
+ *aspace = VME_A24;
+ if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A32)
+ *aspace = VME_A32;
+
+ *cycle = 0;
+ if (lm_ctl & CA91CX42_LM_CTL_SUPR)
+ *cycle |= VME_SUPER;
+ if (lm_ctl & CA91CX42_LM_CTL_NPRIV)
+ *cycle |= VME_USER;
+ if (lm_ctl & CA91CX42_LM_CTL_PGM)
+ *cycle |= VME_PROG;
+ if (lm_ctl & CA91CX42_LM_CTL_DATA)
+ *cycle |= VME_DATA;
+
+ mutex_unlock(&(lm->mtx));
+
+ return enabled;
+}
+
+/*
+ * Attach a callback to a specific location monitor.
+ *
+ * Callback will be passed the monitor triggered.
+ */
+int ca91cx42_lm_attach(struct vme_lm_resource *lm, int monitor,
+ void (*callback)(int))
+{
+ u32 lm_ctl, tmp;
+ struct ca91cx42_driver *bridge;
+ struct device *dev;
+
+ bridge = lm->parent->driver_priv;
+ dev = lm->parent->parent;
+
+ mutex_lock(&(lm->mtx));
+
+ /* Ensure that the location monitor is configured - need PGM or DATA */
+ lm_ctl = ioread32(bridge->base + LM_CTL);
+ if ((lm_ctl & (CA91CX42_LM_CTL_PGM | CA91CX42_LM_CTL_DATA)) == 0) {
+ mutex_unlock(&(lm->mtx));
+ dev_err(dev, "Location monitor not properly configured\n");
+ return -EINVAL;
+ }
+
+ /* Check that a callback isn't already attached */
+ if (bridge->lm_callback[monitor] != NULL) {
+ mutex_unlock(&(lm->mtx));
+ dev_err(dev, "Existing callback attached\n");
+ return -EBUSY;
+ }
+
+ /* Attach callback */
+ bridge->lm_callback[monitor] = callback;
+
+ /* Enable Location Monitor interrupt */
+ tmp = ioread32(bridge->base + LINT_EN);
+ tmp |= CA91CX42_LINT_LM[monitor];
+ iowrite32(tmp, bridge->base + LINT_EN);
+
+ /* Ensure that global Location Monitor Enable set */
+ if ((lm_ctl & CA91CX42_LM_CTL_EN) == 0) {
+ lm_ctl |= CA91CX42_LM_CTL_EN;
+ iowrite32(lm_ctl, bridge->base + LM_CTL);
+ }
+
+ mutex_unlock(&(lm->mtx));
+
+ return 0;
+}
+
+/*
+ * Detach a callback function forn a specific location monitor.
+ */
+int ca91cx42_lm_detach(struct vme_lm_resource *lm, int monitor)
+{
+ u32 tmp;
+ struct ca91cx42_driver *bridge;
+
+ bridge = lm->parent->driver_priv;
+
+ mutex_lock(&(lm->mtx));
+
+ /* Disable Location Monitor and ensure previous interrupts are clear */
+ tmp = ioread32(bridge->base + LINT_EN);
+ tmp &= ~CA91CX42_LINT_LM[monitor];
+ iowrite32(tmp, bridge->base + LINT_EN);
+
+ iowrite32(CA91CX42_LINT_LM[monitor],
+ bridge->base + LINT_STAT);
+
+ /* Detach callback */
+ bridge->lm_callback[monitor] = NULL;
+
+ /* If all location monitors disabled, disable global Location Monitor */
+ if ((tmp & (CA91CX42_LINT_LM0 | CA91CX42_LINT_LM1 | CA91CX42_LINT_LM2 |
+ CA91CX42_LINT_LM3)) == 0) {
+ tmp = ioread32(bridge->base + LM_CTL);
+ tmp &= ~CA91CX42_LM_CTL_EN;
+ iowrite32(tmp, bridge->base + LM_CTL);
+ }
+
+ mutex_unlock(&(lm->mtx));
+
+ return 0;
+}
+
int ca91cx42_slot_get(struct vme_bridge *ca91cx42_bridge)
{
u32 slot = 0;
@@ -1190,12 +1390,10 @@ static int ca91cx42_probe(struct pci_dev *pdev, const struct pci_device_id *id)
#endif
ca91cx42_bridge->irq_set = ca91cx42_irq_set;
ca91cx42_bridge->irq_generate = ca91cx42_irq_generate;
-#if 0
ca91cx42_bridge->lm_set = ca91cx42_lm_set;
ca91cx42_bridge->lm_get = ca91cx42_lm_get;
ca91cx42_bridge->lm_attach = ca91cx42_lm_attach;
ca91cx42_bridge->lm_detach = ca91cx42_lm_detach;
-#endif
ca91cx42_bridge->slot_get = ca91cx42_slot_get;
data = ioread32(ca91cx42_device->base + MISC_CTL);
@@ -1786,77 +1984,7 @@ int ca91cx42_do_dma(vmeDmaPacket_t *vmeDma)
return 0;
}
-int ca91cx42_lm_set(vmeLmCfg_t *vmeLm)
-{
- int temp_ctl = 0;
- if (vmeLm->addrU)
- return -EINVAL;
-
- switch (vmeLm->addrSpace) {
- case VME_A64:
- case VME_USER3:
- case VME_USER4:
- return -EINVAL;
- case VME_A16:
- temp_ctl |= 0x00000;
- break;
- case VME_A24:
- temp_ctl |= 0x10000;
- break;
- case VME_A32:
- temp_ctl |= 0x20000;
- break;
- case VME_CRCSR:
- temp_ctl |= 0x50000;
- break;
- case VME_USER1:
- temp_ctl |= 0x60000;
- break;
- case VME_USER2:
- temp_ctl |= 0x70000;
- break;
- }
-
- /* Disable while we are mucking around */
- iowrite32(0x00000000, bridge->base + LM_CTL);
-
- iowrite32(vmeLm->addr, bridge->base + LM_BS);
-
- /* Setup CTL register. */
- if (vmeLm->userAccessType & VME_SUPER)
- temp_ctl |= 0x00200000;
- if (vmeLm->userAccessType & VME_USER)
- temp_ctl |= 0x00100000;
- if (vmeLm->dataAccessType & VME_PROG)
- temp_ctl |= 0x00800000;
- if (vmeLm->dataAccessType & VME_DATA)
- temp_ctl |= 0x00400000;
-
-
- /* Write ctl reg and enable */
- iowrite32(0x80000000 | temp_ctl, bridge->base + LM_CTL);
- temp_ctl = ioread32(bridge->base + LM_CTL);
-
- return 0;
-}
-
-int ca91cx42_wait_lm(vmeLmCfg_t *vmeLm)
-{
- unsigned long flags;
- unsigned int tmp;
-
- spin_lock_irqsave(&lm_lock, flags);
- spin_unlock_irqrestore(&lm_lock, flags);
- if (tmp == 0) {
- if (vmeLm->lmWait < 10)
- vmeLm->lmWait = 10;
- interruptible_sleep_on_timeout(&lm_queue, vmeLm->lmWait);
- }
- iowrite32(0x00000000, bridge->base + LM_CTL);
-
- return 0;
-}
diff --git a/drivers/staging/vme/bridges/vme_ca91cx42.h b/drivers/staging/vme/bridges/vme_ca91cx42.h
index df10502..b9b6308 100644
--- a/drivers/staging/vme/bridges/vme_ca91cx42.h
+++ b/drivers/staging/vme/bridges/vme_ca91cx42.h
@@ -491,6 +491,19 @@ static const int CA91CX42_LINT_LM[] = { CA91CX42_LINT_LM0, CA91CX42_LINT_LM1,
#define CA91CX42_VSI_CTL_LAS_PCI_IO (1<<0)
#define CA91CX42_VSI_CTL_LAS_PCI_CONF (1<<1)
+/* LM_CTL Register
+ * offset F64
+ */
+#define CA91CX42_LM_CTL_EN (1<<31)
+#define CA91CX42_LM_CTL_PGM (1<<23)
+#define CA91CX42_LM_CTL_DATA (1<<22)
+#define CA91CX42_LM_CTL_SUPR (1<<21)
+#define CA91CX42_LM_CTL_NPRIV (1<<20)
+#define CA91CX42_LM_CTL_AS_M (5<<16)
+#define CA91CX42_LM_CTL_AS_A16 0
+#define CA91CX42_LM_CTL_AS_A24 (1<<16)
+#define CA91CX42_LM_CTL_AS_A32 (1<<17)
+
/*
* VRAI_CTL Register
* offset F70
--
1.7.0.1
More information about the devel
mailing list