Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6

[pandora-kernel.git] / arch / blackfin / kernel / bfin_dma_5xx.c

diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index fd5448d..93229b3 100644 (file)
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -90,6 +90,17 @@ int request_dma(unsigned int channel, char *device_id)
 {
 
        pr_debug("request_dma() : BEGIN \n");
+
+#if defined(CONFIG_BF561) && ANOMALY_05000182
+       if (channel >= CH_IMEM_STREAM0_DEST && channel <= CH_IMEM_STREAM1_DEST) {
+               if (get_cclk() > 500000000) {
+                       printk(KERN_WARNING
+                              "Request IMDMA failed due to ANOMALY 05000182\n");
+                       return -EFAULT;
+               }
+       }
+#endif
+
        mutex_lock(&(dma_ch[channel].dmalock));
 
        if ((dma_ch[channel].chan_status == DMA_CHANNEL_REQUESTED)
@@ -461,6 +472,40 @@ unsigned long get_dma_curr_addr(unsigned int channel)
 }
 EXPORT_SYMBOL(get_dma_curr_addr);
 
+#ifdef CONFIG_PM
+int blackfin_dma_suspend(void)
+{
+       int i;
+
+#ifdef CONFIG_BF561    /* IMDMA channels doesn't have a PERIPHERAL_MAP */
+       for (i = 0; i <= CH_MEM_STREAM3_SRC; i++) {
+#else
+       for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) {
+#endif
+               if (dma_ch[i].chan_status == DMA_CHANNEL_ENABLED) {
+                       printk(KERN_ERR "DMA Channel %d failed to suspend\n", i);
+                       return -EBUSY;
+               }
+
+               dma_ch[i].saved_peripheral_map = dma_ch[i].regs->peripheral_map;
+       }
+
+       return 0;
+}
+
+void blackfin_dma_resume(void)
+{
+       int i;
+
+#ifdef CONFIG_BF561    /* IMDMA channels doesn't have a PERIPHERAL_MAP */
+       for (i = 0; i <= CH_MEM_STREAM3_SRC; i++)
+#else
+       for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++)
+#endif
+               dma_ch[i].regs->peripheral_map = dma_ch[i].saved_peripheral_map;
+}
+#endif
+
 static void *__dma_memcpy(void *dest, const void *src, size_t size)
 {
        int direction;  /* 1 - address decrease, 0 - address increase */