[ARM] 2887/1: OMAP 2/4: Update files common to omap1 and omap2, take 2

Patch from Tony Lindgren

This patch syncs the mainline kernel with linux-omap tree.
The highlights of the patch are:
- Clock updates by Tuukka Tikkanen, Juha Yrjola,
  Daniel Petrini and Tony Lindgren
- DMA fixes by Imre Deak, Juha Yrjola and Daniel Petrini
- Add support to dual-mode hardware timers by Lauri Leukkunen
- GPIO support for 24xx by Paul Mundt
- GPIO wake-up support by Tony Lindgren
- Better GPIO interrupt handler to not lose interrupts by
  Ralph Walden and Ladislav Michl
- Power Management updates by Tuukka Tikkanen
- Make Power Management code use new SRAM functions by
  Tony Lindgren

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 18 insertions, 7 deletions

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index c0a5c2fa42bd..da7b65145658 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -425,7 +425,7 @@ static int dma_handle_ch(int ch)
                 dma_chan[ch + 6].saved_csr = csr >> 7;
                 csr &= 0x7f;
         }
-        if (!csr)
+        if ((csr & 0x3f) == 0)
                 return 0;
         if (unlikely(dma_chan[ch].dev_id == -1)) {
                 printk(KERN_WARNING "Spurious interrupt from DMA channel %d (CSR %04x)\n",
@@ -890,11 +890,11 @@ void omap_enable_lcd_dma(void)
         w |= 1 << 8;
         omap_writew(w, OMAP1610_DMA_LCD_CTRL);
 
+        lcd_dma.active = 1;
+
         w = omap_readw(OMAP1610_DMA_LCD_CCR);
         w |= 1 << 7;
         omap_writew(w, OMAP1610_DMA_LCD_CCR);
-
-        lcd_dma.active = 1;
 }
 
 void omap_setup_lcd_dma(void)
@@ -965,8 +965,8 @@ void omap_clear_dma(int lch)
  */
 dma_addr_t omap_get_dma_src_pos(int lch)
 {
-        return (dma_addr_t) (OMAP_DMA_CSSA_L(lch) |
-                             (OMAP_DMA_CSSA_U(lch) << 16));
+        return (dma_addr_t) (omap_readw(OMAP_DMA_CSSA_L(lch)) |
+        (omap_readw(OMAP_DMA_CSSA_U(lch)) << 16));
 }
 
 /*
@@ -979,8 +979,18 @@ dma_addr_t omap_get_dma_src_pos(int lch)
  */
 dma_addr_t omap_get_dma_dst_pos(int lch)
 {
-        return (dma_addr_t) (OMAP_DMA_CDSA_L(lch) |
-                             (OMAP_DMA_CDSA_U(lch) << 16));
+        return (dma_addr_t) (omap_readw(OMAP_DMA_CDSA_L(lch)) |
+        (omap_readw(OMAP_DMA_CDSA_U(lch)) << 16));
+}
+
+/*
+ * Returns current source transfer counting for the given DMA channel.
+ * Can be used to monitor the progress of a transfer inside a  block.
+ * It must be called with disabled interrupts.
+ */
+int omap_get_dma_src_addr_counter(int lch)
+{
+        return (dma_addr_t) omap_readw(OMAP_DMA_CSAC(lch));
 }
 
 int omap_dma_running(void)
@@ -1076,6 +1086,7 @@ arch_initcall(omap_init_dma);
 
 EXPORT_SYMBOL(omap_get_dma_src_pos);
 EXPORT_SYMBOL(omap_get_dma_dst_pos);
+EXPORT_SYMBOL(omap_get_dma_src_addr_counter);
 EXPORT_SYMBOL(omap_clear_dma);
 EXPORT_SYMBOL(omap_set_dma_priority);
 EXPORT_SYMBOL(omap_request_dma);