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Diffstat (limited to 'firmware/target/arm/imx233/dma-imx233.c')
-rw-r--r--firmware/target/arm/imx233/dma-imx233.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/firmware/target/arm/imx233/dma-imx233.c b/firmware/target/arm/imx233/dma-imx233.c
new file mode 100644
index 0000000000..d75c334aeb
--- /dev/null
+++ b/firmware/target/arm/imx233/dma-imx233.c
@@ -0,0 +1,133 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2011 by amaury Pouly
+ *
+ * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
+ * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include "system.h"
+#include "dma-imx233.h"
+
+void imx233_dma_init(void)
+{
+ /* Enable APHB and APBX */
+ __REG_CLR(HW_APBH_CTRL0) = __BLOCK_CLKGATE | __BLOCK_SFTRST;
+ __REG_CLR(HW_APBX_CTRL0) = __BLOCK_CLKGATE | __BLOCK_SFTRST;
+}
+
+void imx233_dma_reset_channel(unsigned chan)
+{
+ if(APB_IS_APBX_CHANNEL(chan))
+ __REG_SET(HW_APBX_CHANNEL_CTRL) =
+ HW_APBX_CHANNEL_CTRL__RESET_CHANNEL(APB_GET_DMA_CHANNEL(chan));
+ else
+ __REG_SET(HW_APBH_CTRL0) =
+ HW_APBH_CTRL0__RESET_CHANNEL(APB_GET_DMA_CHANNEL(chan));
+}
+
+void imx233_dma_clkgate_channel(unsigned chan, bool enable_clock)
+{
+ if(APB_IS_APBX_CHANNEL(chan))
+ return;
+ if(enable_clock)
+ __REG_CLR(HW_APBH_CTRL0) =
+ HW_APBH_CTRL0__CLKGATE_CHANNEL(APB_GET_DMA_CHANNEL(chan));
+ else
+ __REG_SET(HW_APBH_CTRL0) =
+ HW_APBH_CTRL0__CLKGATE_CHANNEL(APB_GET_DMA_CHANNEL(chan));
+}
+
+void imx233_dma_enable_channel_interrupt(unsigned chan, bool enable)
+{
+ volatile uint32_t *ptr;
+ uint32_t bm;
+ if(APB_IS_APBX_CHANNEL(chan))
+ {
+ ptr = &HW_APBX_CTRL1;
+ bm = HW_APBX_CTRL1__CHx_CMDCMPLT_IRQ_EN(APB_GET_DMA_CHANNEL(chan));
+ }
+ else
+ {
+ ptr = &HW_APBH_CTRL1;;
+ bm = HW_APBH_CTRL1__CHx_CMDCMPLT_IRQ_EN(APB_GET_DMA_CHANNEL(chan));
+ }
+
+ if(enable)
+ {
+ __REG_SET(*ptr) = bm;
+ imx233_dma_clear_channel_interrupt(chan);
+ }
+ else
+ __REG_CLR(*ptr) = bm;
+}
+
+void imx233_dma_clear_channel_interrupt(unsigned chan)
+{
+ if(APB_IS_APBX_CHANNEL(chan))
+ {
+ __REG_CLR(HW_APBX_CTRL1) =
+ HW_APBX_CTRL1__CHx_CMDCMPLT_IRQ(APB_GET_DMA_CHANNEL(chan));
+ __REG_CLR(HW_APBX_CTRL2) =
+ HW_APBX_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan));
+ }
+ else
+ {
+ __REG_CLR(HW_APBH_CTRL1) =
+ HW_APBH_CTRL1__CHx_CMDCMPLT_IRQ(APB_GET_DMA_CHANNEL(chan));
+ __REG_CLR(HW_APBH_CTRL2) =
+ HW_APBH_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan));
+ }
+}
+
+bool imx233_dma_is_channel_error_irq(unsigned chan)
+{
+ if(APB_IS_APBX_CHANNEL(chan))
+ return !!(HW_APBX_CTRL2 &
+ HW_APBX_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan)));
+ else
+ return !!(HW_APBH_CTRL2 &
+ HW_APBH_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan)));
+}
+
+void imx233_dma_start_command(unsigned chan, struct apb_dma_command_t *cmd)
+{
+ if(APB_IS_APBX_CHANNEL(chan))
+ {
+ HW_APBX_CHx_NXTCMDAR(APB_GET_DMA_CHANNEL(chan)) = (uint32_t)cmd;
+ HW_APBX_CHx_SEMA(APB_GET_DMA_CHANNEL(chan)) = 1;
+ }
+ else
+ {
+ HW_APBH_CHx_NXTCMDAR(APB_GET_DMA_CHANNEL(chan)) = (uint32_t)cmd;
+ HW_APBH_CHx_SEMA(APB_GET_DMA_CHANNEL(chan)) = 1;
+ }
+}
+
+void imx233_dma_wait_completion(unsigned chan)
+{
+ volatile uint32_t *sema;
+ if(APB_IS_APBX_CHANNEL(chan))
+ sema = &HW_APBX_CHx_SEMA(APB_GET_DMA_CHANNEL(chan));
+ else
+ sema = &HW_APBH_CHx_SEMA(APB_GET_DMA_CHANNEL(chan));
+
+ while(*sema & HW_APB_CHx_SEMA__PHORE_BM)
+ ;
+}