MERGE-via-pending-tracking-hist-MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-s3c64xx-dma-support-1235439162-1235439227

pending-tracking-hist top was MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-s3c64xx-dma-support-1235439162-1235439227 / 3d6a1b21cf5fbdb6250d781b0a4900a7a0768aa1 ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-stable-tracking-hist-MERGE-via-mokopatches-tracking-s3c64xx-dma-support-1235439162

stable-tracking-hist top was MERGE-via-mokopatches-tracking-s3c64xx-dma-support-1235439162 / 893e864e65adffc9eb085ed4f8b552a31dcec840 ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-mokopatches-tracking-hist-s3c64xx-dma-support

mokopatches-tracking-hist top was s3c64xx-dma-support / 2515f9a1d53d19b1e61d639875aedcbe7929666e ... parent commitmessage:
From: Ben Dooks <ben@simtec.co.uk>
S3C64XX: DMA support

Add support for the DMA blocks in the S3C64XX series
of CPUS, which are based on the ARM PL080 PrimeCell
system.

Unfortunately, these DMA controllers diverge from the
PL080 design by adding another DMA controller register
and configuration for OneNAND.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>

2 files changed, 180 insertions, 0 deletions

diff --git a/arch/arm/plat-s3c64xx/include/plat/dma-plat.h b/arch/arm/plat-s3c64xx/include/plat/dma-plat.h
new file mode 100644
index 00000000000..90baf8287bc
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/include/plat/dma-plat.h
@@ -0,0 +1,70 @@
+/* linux/arch/arm/plat-s3c64xx/include/plat/dma-plat.h
+ *
+ * Copyright 2009 Openmoko, Inc.
+ * Copyright 2009 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX DMA core
+ *
+ * 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.
+*/
+
+#define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */
+
+struct s3c64xx_dma_buff;
+
+/** s3c64xx_dma_buff - S3C64XX DMA buffer descriptor
+ * @next: Pointer to next buffer in queue or ring.
+ * @pw: Client provided identifier
+ * @lli: Pointer to hardware descriptor this buffer is associated with.
+ * @lli_dma: Hardare address of the descriptor.
+ */
+struct s3c64xx_dma_buff {
+	struct s3c64xx_dma_buff *next;
+
+	void			*pw;
+	struct pl080_lli	*lli;
+	dma_addr_t		 lli_dma;
+};
+
+struct s3c64xx_dmac;
+
+struct s3c2410_dma_chan {
+	unsigned char		 number;      /* number of this dma channel */
+	unsigned char		 in_use;      /* channel allocated */
+	unsigned char		 bit;	      /* bit for enable/disable/etc */
+	unsigned char		 hw_width;
+	unsigned char		 peripheral;
+
+	unsigned int		 flags;
+	enum s3c2410_dmasrc	 source;
+
+
+	dma_addr_t		dev_addr;
+
+	struct s3c2410_dma_client *client;
+	struct s3c64xx_dmac	*dmac;		/* pointer to controller */
+
+	void __iomem		*regs;
+
+	/* cdriver callbacks */
+	s3c2410_dma_cbfn_t	 callback_fn;	/* buffer done callback */
+	s3c2410_dma_opfn_t	 op_fn;		/* channel op callback */
+
+	/* buffer list and information */
+	struct s3c64xx_dma_buff	*curr;		/* current dma buffer */
+	struct s3c64xx_dma_buff	*next;		/* next buffer to load */
+	struct s3c64xx_dma_buff	*end;		/* end of queue */
+
+	/* note, when channel is running in circular mode, curr is the
+	 * first buffer enqueued, end is the last and curr is where the
+	 * last buffer-done event is set-at. The buffers are not freed
+	 * and the last buffer hardware descriptor points back to the
+	 * first. 
+	 */
+};
+
+#include <plat/dma-core.h>
diff --git a/arch/arm/plat-s3c64xx/include/plat/pl080.h b/arch/arm/plat-s3c64xx/include/plat/pl080.h
new file mode 100644
index 00000000000..afe161f475d
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/include/plat/pl080.h
@@ -0,0 +1,110 @@
+/* arch/arm/include/asm/hardware/pl080.h
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * ARM PrimeCell PL080 DMA controller
+ *
+ * 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.
+*/
+
+/* Note, there are some Samsung updates to this controller block which
+ * make it not entierly compatible with the PL080 specification from
+ * ARM. When in doubt, check the Samsung documentation first.
+ *
+ * The Samsung defines are PL080S, and add an extra controll register,
+ * the ability to move more than 2^11 counts of data and some extra
+ * OneNAND features.
+*/
+
+#define PL080_INT_STATUS			(0x00)
+#define PL080_TC_STATUS				(0x04)
+#define PL080_TC_CLEAR				(0x08)
+#define PL080_ERR_STATUS			(0x0C)
+#define PL080_ERR_CLEAR				(0x10)
+#define PL080_RAW_TC_STATUS			(0x14)
+#define PL080_RAW_ERR_STATUS			(0x18)
+#define PL080_EN_CHAN				(0x1c)
+#define PL080_SOFT_BREQ				(0x20)
+#define PL080_SOFT_SREQ				(0x24)
+#define PL080_SOFT_LBREQ			(0x28)
+#define PL080_SOFT_LSREQ			(0x2C)
+
+#define PL080_CONFIG				(0x30)
+#define PL080_CONFIG_M2_BE			(1 << 2)
+#define PL080_CONFIG_M1_BE			(1 << 1)
+#define PL080_CONFIG_ENABLE			(1 << 0)
+
+#define PL080_SYNC				(0x34)
+
+/* Per channel configuration registers */
+
+#define PL008_Cx_STRIDE				(0x20)
+#define PL080_Cx_BASE(x)			((0x100 + (x * 0x20)))
+#define PL080_Cx_SRC_ADDR(x)			((0x100 + (x * 0x20)))
+#define PL080_Cx_DST_ADDR(x)			((0x104 + (x * 0x20)))
+#define PL080_Cx_LLI(x)				((0x108 + (x * 0x20)))
+#define PL080_Cx_CONTROL(x)			((0x10C + (x * 0x20)))
+#define PL080_Cx_CONFIG(x)			((0x110 + (x * 0x20)))
+#define PL080S_Cx_CONTROL2(x)			((0x110 + (x * 0x20)))
+#define PL080S_Cx_CONFIG(x)			((0x114 + (x * 0x20)))
+
+#define PL080_CH_SRC_ADDR			(0x00)
+#define PL080_CH_DST_ADDR			(0x04)
+#define PL080_CH_LLI				(0x08)
+#define PL080_CH_CONTROL			(0x0C)
+#define PL080_CH_CONFIG				(0x10)
+#define PL080S_CH_CONTROL2			(0x10)
+#define PL080S_CH_CONFIG			(0x14)
+
+#define PL080_LLI_ADDR_MASK			(0x3fffffff << 2)
+#define PL080_LLI_ADDR_SHIFT			(2)
+#define PL080_LLI_LM_AHB2			(1 << 0)
+
+#define PL080_CONTROL_TC_IRQ_EN			(1 << 31)
+#define PL080_CONTROL_PROT_MASK			(0x7 << 28)
+#define PL080_CONTROL_PROT_SHIFT		(28)
+#define PL080_CONTROL_PROT_SYS			(1 << 28)
+#define PL080_CONTROL_DST_INCR			(1 << 27)
+#define PL080_CONTROL_SRC_INCR			(1 << 26)
+#define PL080_CONTROL_DST_AHB2			(1 << 25)
+#define PL080_CONTROL_SRC_AHB2			(1 << 24)
+#define PL080_CONTROL_DWIDTH_MASK		(0x7 << 21)
+#define PL080_CONTROL_DWIDTH_SHIFT		(21)
+#define PL080_CONTROL_SWIDTH_MASK		(0x7 << 18)
+#define PL080_CONTROL_SWIDTH_SHIFT		(18)
+#define PL080_CONTROL_DB_SIZE_MASK		(0x7 << 15)
+#define PL080_CONTROL_DB_SIZE_SHIFT		(15)
+#define PL080_CONTROL_SB_SIZE_MASK		(0x7 << 12)
+#define PL080_CONTROL_SB_SIZE_SHIFT		(12)
+#define PL080_CONTROL_TRANSFER_SIZE_MASK	(0xfff << 0)
+#define PL080_CONTROL_TRANSFER_SIZE_SHIFT	(0)
+
+#define PL080_CONFIG_HALT			(1 << 18)
+#define PL080_CONFIG_ACTIVE			(1 << 17)
+#define PL080_CONFIG_LOCK			(1 << 16)
+#define PL080_CONFIG_TC_IRQ_MASK		(1 << 15)
+#define PL080_CONFIG_ERR_IRQ_MASK		(1 << 14)
+#define PL080_CONFIG_FLOW_CONTROL_MASK		(0x7 << 11)
+#define PL080_CONFIG_FLOW_CONTROL_SHIFT		(11)
+#define PL080_CONFIG_DST_SEL_MASK		(0xf << 6)
+#define PL080_CONFIG_DST_SEL_SHIFT		(6)
+#define PL080_CONFIG_SRC_SEL_MASK		(0xf << 1)
+#define PL080_CONFIG_SRC_SEL_SHIFT		(1)
+#define PL080_CONFIG_ENABLE			(1 << 0)
+
+
+/* DMA linked list chain structure */
+
+struct pl080_lli {
+	u32	src_addr;
+	u32	dst_addr;
+	u32	next_lli;
+	u32	control0;
+	u32	control1;
+};
+