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authorOlof Johansson <olof@lixom.net>2008-03-05 12:11:48 -0600
committerOlof Johansson <olof@lixom.net>2008-03-05 12:12:14 -0600
commitafea3278f73c14271ee60ca7593ad74b7a946486 (patch)
treef2a0964c318125eff3199dc387093819d0084760 /arch/powerpc/platforms/pasemi
parent6a2d322e4b81edc2ab35573f1c52f93d1d16eebb (diff)
pasemi_mac: Move RX/TX section enablement to dma_lib
Also stop both rx and tx sections before changing the configuration of the dma device during init. Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'arch/powerpc/platforms/pasemi')
-rw-r--r--arch/powerpc/platforms/pasemi/dma_lib.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pasemi/dma_lib.c b/arch/powerpc/platforms/pasemi/dma_lib.c
index c529d8dff39..48cb7c99962 100644
--- a/arch/powerpc/platforms/pasemi/dma_lib.c
+++ b/arch/powerpc/platforms/pasemi/dma_lib.c
@@ -17,6 +17,7 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
@@ -410,6 +411,7 @@ int pasemi_dma_init(void)
struct resource res;
struct device_node *dn;
int i, intf, err = 0;
+ unsigned long timeout;
u32 tmp;
if (!machine_is(pasemi))
@@ -478,6 +480,34 @@ int pasemi_dma_init(void)
for (i = 0; i < MAX_RXCH; i++)
__set_bit(i, rxch_free);
+ timeout = jiffies + HZ;
+ pasemi_write_dma_reg(PAS_DMA_COM_RXCMD, 0);
+ while (pasemi_read_dma_reg(PAS_DMA_COM_RXSTA) & 1) {
+ if (time_after(jiffies, timeout)) {
+ pr_warning("Warning: Could not disable RX section\n");
+ break;
+ }
+ }
+
+ timeout = jiffies + HZ;
+ pasemi_write_dma_reg(PAS_DMA_COM_TXCMD, 0);
+ while (pasemi_read_dma_reg(PAS_DMA_COM_TXSTA) & 1) {
+ if (time_after(jiffies, timeout)) {
+ pr_warning("Warning: Could not disable TX section\n");
+ break;
+ }
+ }
+
+ /* setup resource allocations for the different DMA sections */
+ tmp = pasemi_read_dma_reg(PAS_DMA_COM_CFG);
+ pasemi_write_dma_reg(PAS_DMA_COM_CFG, tmp | 0x18000000);
+
+ /* enable tx section */
+ pasemi_write_dma_reg(PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
+
+ /* enable rx section */
+ pasemi_write_dma_reg(PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
+
printk(KERN_INFO "PA Semi PWRficient DMA library initialized "
"(%d tx, %d rx channels)\n", num_txch, num_rxch);