From: Bryan Wu <cooloney@xxxxxxxxxx>
- DMA registers in Blackfin have different layout
- DMA interrupt flags need to be cleared by software
Signed-off-by: Bryan Wu <cooloney@xxxxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/musb/musbhsdma.c | 82 ++++-------------------
drivers/usb/musb/musbhsdma.h | 149 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 162 insertions(+), 69 deletions(-)
create mode 100644 drivers/usb/musb/musbhsdma.h
diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c
index d193b78..8662e9e 100644
--- a/drivers/usb/musb/musbhsdma.c
+++ b/drivers/usb/musb/musbhsdma.c
@@ -34,58 +34,7 @@
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include "musb_core.h"
-
-#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430)
-#include "omap2430.h"
-#endif
-
-#define MUSB_HSDMA_BASE 0x200
-#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0)
-#define MUSB_HSDMA_CONTROL 0x4
-#define MUSB_HSDMA_ADDRESS 0x8
-#define MUSB_HSDMA_COUNT 0xc
-
-#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \
- (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)
-
-/* control register (16-bit): */
-#define MUSB_HSDMA_ENABLE_SHIFT 0
-#define MUSB_HSDMA_TRANSMIT_SHIFT 1
-#define MUSB_HSDMA_MODE1_SHIFT 2
-#define MUSB_HSDMA_IRQENABLE_SHIFT 3
-#define MUSB_HSDMA_ENDPOINT_SHIFT 4
-#define MUSB_HSDMA_BUSERROR_SHIFT 8
-#define MUSB_HSDMA_BURSTMODE_SHIFT 9
-#define MUSB_HSDMA_BURSTMODE (3 << MUSB_HSDMA_BURSTMODE_SHIFT)
-#define MUSB_HSDMA_BURSTMODE_UNSPEC 0
-#define MUSB_HSDMA_BURSTMODE_INCR4 1
-#define MUSB_HSDMA_BURSTMODE_INCR8 2
-#define MUSB_HSDMA_BURSTMODE_INCR16 3
-
-#define MUSB_HSDMA_CHANNELS 8
-
-struct musb_dma_controller;
-
-struct musb_dma_channel {
- struct dma_channel channel;
- struct musb_dma_controller *controller;
- u32 start_addr;
- u32 len;
- u16 max_packet_sz;
- u8 idx;
- u8 epnum;
- u8 transmit;
-};
-
-struct musb_dma_controller {
- struct dma_controller controller;
- struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS];
- void *private_data;
- void __iomem *base;
- u8 channel_count;
- u8 used_channels;
- u8 irq;
-};
+#include "musbhsdma.h"
static int dma_controller_start(struct dma_controller *c)
{
@@ -203,12 +152,8 @@ static void configure_channel(struct dma_channel *channel,
: 0);
/* address/count */
- musb_writel(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS),
- dma_addr);
- musb_writel(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT),
- len);
+ musb_write_hsdma_addr(mbase, bchannel, dma_addr);
+ musb_write_hsdma_count(mbase, bchannel, len);
/* control (this should start things) */
musb_writew(mbase,
@@ -279,13 +224,8 @@ static int dma_channel_abort(struct dma_channel *channel)
musb_writew(mbase,
MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL),
0);
- musb_writel(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS),
- 0);
- musb_writel(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT),
- 0);
-
+ musb_write_hsdma_addr(mbase, bchannel, 0);
+ musb_write_hsdma_count(mbase, bchannel, 0);
channel->status = MUSB_DMA_STATUS_FREE;
}
@@ -333,10 +273,8 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data)
} else {
u8 devctl;
- addr = musb_readl(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(
- bchannel,
- MUSB_HSDMA_ADDRESS));
+ addr = musb_read_hsdma_addr(mbase,
+ bchannel);
channel->actual_len = addr
- musb_channel->start_addr;
@@ -375,6 +313,12 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data)
}
}
}
+
+#ifdef CONFIG_BLACKFIN
+ /* Clear DMA interrup flags */
+ musb_writeb(mbase, MUSB_HSDMA_INTR, int_hsdma);
+#endif
+
retval = IRQ_HANDLED;
done:
spin_unlock_irqrestore(&musb->lock, flags);
diff --git a/drivers/usb/musb/musbhsdma.h b/drivers/usb/musb/musbhsdma.h
new file mode 100644
index 0000000..1299d92
--- /dev/null
+++ b/drivers/usb/musb/musbhsdma.h
@@ -0,0 +1,149 @@
+/*
+ * MUSB OTG driver - support for Mentor's DMA controller
+ *
+ * Copyright 2005 Mentor Graphics Corporation
+ * Copyright (C) 2005-2007 by Texas Instruments
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430)
+#include "omap2430.h"
+#endif
+
+#ifndef CONFIG_BLACKFIN
+
+#define MUSB_HSDMA_BASE 0x200
+#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0)
+#define MUSB_HSDMA_CONTROL 0x4
+#define MUSB_HSDMA_ADDRESS 0x8
+#define MUSB_HSDMA_COUNT 0xc
+
+#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \
+ (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)
+
+#define musb_read_hsdma_addr(mbase, bchannel) \
+ musb_readl(mbase, \
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS))
+
+#define musb_write_hsdma_addr(mbase, bchannel, addr) \
+ musb_writel(mbase, \
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \
+ addr)
+
+#define musb_write_hsdma_count(mbase, bchannel, len) \
+ musb_writel(mbase, \
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \
+ len)
+#else
+
+#define MUSB_HSDMA_BASE 0x400
+#define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0)
+#define MUSB_HSDMA_CONTROL 0x04
+#define MUSB_HSDMA_ADDR_LOW 0x08
+#define MUSB_HSDMA_ADDR_HIGH 0x0C
+#define MUSB_HSDMA_COUNT_LOW 0x10
+#define MUSB_HSDMA_COUNT_HIGH 0x14
+
+#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \
+ (MUSB_HSDMA_BASE + (_bchannel * 0x20) + _offset)
+
+static inline u32 musb_read_hsdma_addr(void __iomem *mbase, u8 bchannel)
+{
+ u32 addr = musb_readw(mbase,
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH));
+
+ addr = addr << 16;
+
+ addr |= musb_readw(mbase,
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW));
+
+ return addr;
+}
+
+static inline void musb_write_hsdma_addr(void __iomem *mbase,
+ u8 bchannel, dma_addr_t dma_addr)
+{
+ musb_writew(mbase,
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW),
+ ((u16)((u32) dma_addr & 0xFFFF)));
+ musb_writew(mbase,
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH),
+ ((u16)(((u32) dma_addr >> 16) & 0xFFFF)));
+}
+
+static inline void musb_write_hsdma_count(void __iomem *mbase,
+ u8 bchannel, u32 len)
+{
+ musb_writew(mbase,
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW),
+ ((u16)((u32) len & 0xFFFF)));
+ musb_writew(mbase,
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH),
+ ((u16)(((u32) len >> 16) & 0xFFFF)));
+}
+
+#endif /* CONFIG_BLACKFIN */
+
+/* control register (16-bit): */
+#define MUSB_HSDMA_ENABLE_SHIFT 0
+#define MUSB_HSDMA_TRANSMIT_SHIFT 1
+#define MUSB_HSDMA_MODE1_SHIFT 2
+#define MUSB_HSDMA_IRQENABLE_SHIFT 3
+#define MUSB_HSDMA_ENDPOINT_SHIFT 4
+#define MUSB_HSDMA_BUSERROR_SHIFT 8
+#define MUSB_HSDMA_BURSTMODE_SHIFT 9
+#define MUSB_HSDMA_BURSTMODE (3 << MUSB_HSDMA_BURSTMODE_SHIFT)
+#define MUSB_HSDMA_BURSTMODE_UNSPEC 0
+#define MUSB_HSDMA_BURSTMODE_INCR4 1
+#define MUSB_HSDMA_BURSTMODE_INCR8 2
+#define MUSB_HSDMA_BURSTMODE_INCR16 3
+
+#define MUSB_HSDMA_CHANNELS 8
+
+struct musb_dma_controller;
+
+struct musb_dma_channel {
+ struct dma_channel channel;
+ struct musb_dma_controller *controller;
+ u32 start_addr;
+ u32 len;
+ u16 max_packet_sz;
+ u8 idx;
+ u8 epnum;
+ u8 transmit;
+};
+
+struct musb_dma_controller {
+ struct dma_controller controller;
+ struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS];
+ void *private_data;
+ void __iomem *base;
+ u8 channel_count;
+ u8 used_channels;
+ u8 irq;
+};
--
1.6.0.4
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