Merge http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm into for-rmk

1 files changed, 453 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2410/include/mach/dma.h b/arch/arm/mach-s3c2410/include/mach/dma.h
new file mode 100644
index 000000000000..891b53cd69b8
--- /dev/null
+++ b/arch/arm/mach-s3c2410/include/mach/dma.h
@@ -0,0 +1,453 @@
+/* arch/arm/mach-s3c2410/include/mach/dma.h
+ *
+ * Copyright (C) 2003,2004,2006 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * Samsung S3C241XX DMA support
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_DMA_H
+#define __ASM_ARCH_DMA_H __FILE__
+
+#include <linux/sysdev.h>
+#include <mach/hardware.h>
+
+/*
+ * This is the maximum DMA address(physical address) that can be DMAd to.
+ *
+ */
+#define MAX_DMA_ADDRESS		0x40000000
+#define MAX_DMA_TRANSFER_SIZE   0x100000 /* Data Unit is half word  */
+
+/* We use `virtual` dma channels to hide the fact we have only a limited
+ * number of DMA channels, and not of all of them (dependant on the device)
+ * can be attached to any DMA source. We therefore let the DMA core handle
+ * the allocation of hardware channels to clients.
+*/
+
+enum dma_ch {
+	DMACH_XD0,
+	DMACH_XD1,
+	DMACH_SDI,
+	DMACH_SPI0,
+	DMACH_SPI1,
+	DMACH_UART0,
+	DMACH_UART1,
+	DMACH_UART2,
+	DMACH_TIMER,
+	DMACH_I2S_IN,
+	DMACH_I2S_OUT,
+	DMACH_PCM_IN,
+	DMACH_PCM_OUT,
+	DMACH_MIC_IN,
+	DMACH_USB_EP1,
+	DMACH_USB_EP2,
+	DMACH_USB_EP3,
+	DMACH_USB_EP4,
+	DMACH_UART0_SRC2,	/* s3c2412 second uart sources */
+	DMACH_UART1_SRC2,
+	DMACH_UART2_SRC2,
+	DMACH_UART3,		/* s3c2443 has extra uart */
+	DMACH_UART3_SRC2,
+	DMACH_MAX,		/* the end entry */
+};
+
+#define DMACH_LOW_LEVEL	(1<<28)	/* use this to specifiy hardware ch no */
+
+/* we have 4 dma channels */
+#ifndef CONFIG_CPU_S3C2443
+#define S3C2410_DMA_CHANNELS		(4)
+#else
+#define S3C2410_DMA_CHANNELS		(6)
+#endif
+
+/* types */
+
+enum s3c2410_dma_state {
+	S3C2410_DMA_IDLE,
+	S3C2410_DMA_RUNNING,
+	S3C2410_DMA_PAUSED
+};
+
+
+/* enum s3c2410_dma_loadst
+ *
+ * This represents the state of the DMA engine, wrt to the loaded / running
+ * transfers. Since we don't have any way of knowing exactly the state of
+ * the DMA transfers, we need to know the state to make decisions on wether
+ * we can
+ *
+ * S3C2410_DMA_NONE
+ *
+ * There are no buffers loaded (the channel should be inactive)
+ *
+ * S3C2410_DMA_1LOADED
+ *
+ * There is one buffer loaded, however it has not been confirmed to be
+ * loaded by the DMA engine. This may be because the channel is not
+ * yet running, or the DMA driver decided that it was too costly to
+ * sit and wait for it to happen.
+ *
+ * S3C2410_DMA_1RUNNING
+ *
+ * The buffer has been confirmed running, and not finisged
+ *
+ * S3C2410_DMA_1LOADED_1RUNNING
+ *
+ * There is a buffer waiting to be loaded by the DMA engine, and one
+ * currently running.
+*/
+
+enum s3c2410_dma_loadst {
+	S3C2410_DMALOAD_NONE,
+	S3C2410_DMALOAD_1LOADED,
+	S3C2410_DMALOAD_1RUNNING,
+	S3C2410_DMALOAD_1LOADED_1RUNNING,
+};
+
+enum s3c2410_dma_buffresult {
+	S3C2410_RES_OK,
+	S3C2410_RES_ERR,
+	S3C2410_RES_ABORT
+};
+
+enum s3c2410_dmasrc {
+	S3C2410_DMASRC_HW,		/* source is memory */
+	S3C2410_DMASRC_MEM		/* source is hardware */
+};
+
+/* enum s3c2410_chan_op
+ *
+ * operation codes passed to the DMA code by the user, and also used
+ * to inform the current channel owner of any changes to the system state
+*/
+
+enum s3c2410_chan_op {
+	S3C2410_DMAOP_START,
+	S3C2410_DMAOP_STOP,
+	S3C2410_DMAOP_PAUSE,
+	S3C2410_DMAOP_RESUME,
+	S3C2410_DMAOP_FLUSH,
+	S3C2410_DMAOP_TIMEOUT,		/* internal signal to handler */
+	S3C2410_DMAOP_STARTED,		/* indicate channel started */
+};
+
+/* flags */
+
+#define S3C2410_DMAF_SLOW         (1<<0)   /* slow, so don't worry about
+					    * waiting for reloads */
+#define S3C2410_DMAF_AUTOSTART    (1<<1)   /* auto-start if buffer queued */
+
+/* dma buffer */
+
+struct s3c2410_dma_client {
+	char                *name;
+};
+
+/* s3c2410_dma_buf_s
+ *
+ * internally used buffer structure to describe a queued or running
+ * buffer.
+*/
+
+struct s3c2410_dma_buf;
+struct s3c2410_dma_buf {
+	struct s3c2410_dma_buf	*next;
+	int			 magic;		/* magic */
+	int			 size;		/* buffer size in bytes */
+	dma_addr_t		 data;		/* start of DMA data */
+	dma_addr_t		 ptr;		/* where the DMA got to [1] */
+	void			*id;		/* client's id */
+};
+
+/* [1] is this updated for both recv/send modes? */
+
+struct s3c2410_dma_chan;
+
+/* s3c2410_dma_cbfn_t
+ *
+ * buffer callback routine type
+*/
+
+typedef void (*s3c2410_dma_cbfn_t)(struct s3c2410_dma_chan *,
+				   void *buf, int size,
+				   enum s3c2410_dma_buffresult result);
+
+typedef int  (*s3c2410_dma_opfn_t)(struct s3c2410_dma_chan *,
+				   enum s3c2410_chan_op );
+
+struct s3c2410_dma_stats {
+	unsigned long		loads;
+	unsigned long		timeout_longest;
+	unsigned long		timeout_shortest;
+	unsigned long		timeout_avg;
+	unsigned long		timeout_failed;
+};
+
+struct s3c2410_dma_map;
+
+/* struct s3c2410_dma_chan
+ *
+ * full state information for each DMA channel
+*/
+
+struct s3c2410_dma_chan {
+	/* channel state flags and information */
+	unsigned char		 number;      /* number of this dma channel */
+	unsigned char		 in_use;      /* channel allocated */
+	unsigned char		 irq_claimed; /* irq claimed for channel */
+	unsigned char		 irq_enabled; /* irq enabled for channel */
+	unsigned char		 xfer_unit;   /* size of an transfer */
+
+	/* channel state */
+
+	enum s3c2410_dma_state	 state;
+	enum s3c2410_dma_loadst	 load_state;
+	struct s3c2410_dma_client *client;
+
+	/* channel configuration */
+	enum s3c2410_dmasrc	 source;
+	unsigned long		 dev_addr;
+	unsigned long		 load_timeout;
+	unsigned int		 flags;		/* channel flags */
+	unsigned int		 hw_cfg;	/* last hw config */
+
+	struct s3c24xx_dma_map	*map;		/* channel hw maps */
+
+	/* channel's hardware position and configuration */
+	void __iomem		*regs;		/* channels registers */
+	void __iomem		*addr_reg;	/* data address register */
+	unsigned int		 irq;		/* channel irq */
+	unsigned long		 dcon;		/* default value of DCON */
+
+	/* driver handles */
+	s3c2410_dma_cbfn_t	 callback_fn;	/* buffer done callback */
+	s3c2410_dma_opfn_t	 op_fn;		/* channel op callback */
+
+	/* stats gathering */
+	struct s3c2410_dma_stats *stats;
+	struct s3c2410_dma_stats  stats_store;
+
+	/* buffer list and information */
+	struct s3c2410_dma_buf	*curr;		/* current dma buffer */
+	struct s3c2410_dma_buf	*next;		/* next buffer to load */
+	struct s3c2410_dma_buf	*end;		/* end of queue */
+
+	/* system device */
+	struct sys_device	dev;
+};
+
+/* the currently allocated channel information */
+extern struct s3c2410_dma_chan s3c2410_chans[];
+
+/* note, we don't really use dma_device_t at the moment */
+typedef unsigned long dma_device_t;
+
+/* functions --------------------------------------------------------------- */
+
+/* s3c2410_dma_request
+ *
+ * request a dma channel exclusivley
+*/
+
+extern int s3c2410_dma_request(dmach_t channel,
+			       struct s3c2410_dma_client *, void *dev);
+
+
+/* s3c2410_dma_ctrl
+ *
+ * change the state of the dma channel
+*/
+
+extern int s3c2410_dma_ctrl(dmach_t channel, enum s3c2410_chan_op op);
+
+/* s3c2410_dma_setflags
+ *
+ * set the channel's flags to a given state
+*/
+
+extern int s3c2410_dma_setflags(dmach_t channel,
+				unsigned int flags);
+
+/* s3c2410_dma_free
+ *
+ * free the dma channel (will also abort any outstanding operations)
+*/
+
+extern int s3c2410_dma_free(dmach_t channel, struct s3c2410_dma_client *);
+
+/* s3c2410_dma_enqueue
+ *
+ * place the given buffer onto the queue of operations for the channel.
+ * The buffer must be allocated from dma coherent memory, or the Dcache/WB
+ * drained before the buffer is given to the DMA system.
+*/
+
+extern int s3c2410_dma_enqueue(dmach_t channel, void *id,
+			       dma_addr_t data, int size);
+
+/* s3c2410_dma_config
+ *
+ * configure the dma channel
+*/
+
+extern int s3c2410_dma_config(dmach_t channel, int xferunit, int dcon);
+
+/* s3c2410_dma_devconfig
+ *
+ * configure the device we're talking to
+*/
+
+extern int s3c2410_dma_devconfig(int channel, enum s3c2410_dmasrc source,
+				 int hwcfg, unsigned long devaddr);
+
+/* s3c2410_dma_getposition
+ *
+ * get the position that the dma transfer is currently at
+*/
+
+extern int s3c2410_dma_getposition(dmach_t channel,
+				   dma_addr_t *src, dma_addr_t *dest);
+
+extern int s3c2410_dma_set_opfn(dmach_t, s3c2410_dma_opfn_t rtn);
+extern int s3c2410_dma_set_buffdone_fn(dmach_t, s3c2410_dma_cbfn_t rtn);
+
+/* DMA Register definitions */
+
+#define S3C2410_DMA_DISRC       (0x00)
+#define S3C2410_DMA_DISRCC      (0x04)
+#define S3C2410_DMA_DIDST       (0x08)
+#define S3C2410_DMA_DIDSTC      (0x0C)
+#define S3C2410_DMA_DCON        (0x10)
+#define S3C2410_DMA_DSTAT       (0x14)
+#define S3C2410_DMA_DCSRC       (0x18)
+#define S3C2410_DMA_DCDST       (0x1C)
+#define S3C2410_DMA_DMASKTRIG   (0x20)
+#define S3C2412_DMA_DMAREQSEL	(0x24)
+#define S3C2443_DMA_DMAREQSEL	(0x24)
+
+#define S3C2410_DISRCC_INC	(1<<0)
+#define S3C2410_DISRCC_APB	(1<<1)
+
+#define S3C2410_DMASKTRIG_STOP   (1<<2)
+#define S3C2410_DMASKTRIG_ON     (1<<1)
+#define S3C2410_DMASKTRIG_SWTRIG (1<<0)
+
+#define S3C2410_DCON_DEMAND     (0<<31)
+#define S3C2410_DCON_HANDSHAKE  (1<<31)
+#define S3C2410_DCON_SYNC_PCLK  (0<<30)
+#define S3C2410_DCON_SYNC_HCLK  (1<<30)
+
+#define S3C2410_DCON_INTREQ     (1<<29)
+
+#define S3C2410_DCON_CH0_XDREQ0	(0<<24)
+#define S3C2410_DCON_CH0_UART0	(1<<24)
+#define S3C2410_DCON_CH0_SDI	(2<<24)
+#define S3C2410_DCON_CH0_TIMER	(3<<24)
+#define S3C2410_DCON_CH0_USBEP1	(4<<24)
+
+#define S3C2410_DCON_CH1_XDREQ1	(0<<24)
+#define S3C2410_DCON_CH1_UART1	(1<<24)
+#define S3C2410_DCON_CH1_I2SSDI	(2<<24)
+#define S3C2410_DCON_CH1_SPI	(3<<24)
+#define S3C2410_DCON_CH1_USBEP2	(4<<24)
+
+#define S3C2410_DCON_CH2_I2SSDO	(0<<24)
+#define S3C2410_DCON_CH2_I2SSDI	(1<<24)
+#define S3C2410_DCON_CH2_SDI	(2<<24)
+#define S3C2410_DCON_CH2_TIMER	(3<<24)
+#define S3C2410_DCON_CH2_USBEP3	(4<<24)
+
+#define S3C2410_DCON_CH3_UART2	(0<<24)
+#define S3C2410_DCON_CH3_SDI	(1<<24)
+#define S3C2410_DCON_CH3_SPI	(2<<24)
+#define S3C2410_DCON_CH3_TIMER	(3<<24)
+#define S3C2410_DCON_CH3_USBEP4	(4<<24)
+
+#define S3C2410_DCON_SRCSHIFT   (24)
+#define S3C2410_DCON_SRCMASK	(7<<24)
+
+#define S3C2410_DCON_BYTE       (0<<20)
+#define S3C2410_DCON_HALFWORD   (1<<20)
+#define S3C2410_DCON_WORD       (2<<20)
+
+#define S3C2410_DCON_AUTORELOAD (0<<22)
+#define S3C2410_DCON_NORELOAD   (1<<22)
+#define S3C2410_DCON_HWTRIG     (1<<23)
+
+#ifdef CONFIG_CPU_S3C2440
+#define S3C2440_DIDSTC_CHKINT	(1<<2)
+
+#define S3C2440_DCON_CH0_I2SSDO	(5<<24)
+#define S3C2440_DCON_CH0_PCMIN	(6<<24)
+
+#define S3C2440_DCON_CH1_PCMOUT	(5<<24)
+#define S3C2440_DCON_CH1_SDI	(6<<24)
+
+#define S3C2440_DCON_CH2_PCMIN	(5<<24)
+#define S3C2440_DCON_CH2_MICIN	(6<<24)
+
+#define S3C2440_DCON_CH3_MICIN	(5<<24)
+#define S3C2440_DCON_CH3_PCMOUT	(6<<24)
+#endif
+
+#ifdef CONFIG_CPU_S3C2412
+
+#define S3C2412_DMAREQSEL_SRC(x)	((x)<<1)
+
+#define S3C2412_DMAREQSEL_HW		(1)
+
+#define S3C2412_DMAREQSEL_SPI0TX	S3C2412_DMAREQSEL_SRC(0)
+#define S3C2412_DMAREQSEL_SPI0RX	S3C2412_DMAREQSEL_SRC(1)
+#define S3C2412_DMAREQSEL_SPI1TX	S3C2412_DMAREQSEL_SRC(2)
+#define S3C2412_DMAREQSEL_SPI1RX	S3C2412_DMAREQSEL_SRC(3)
+#define S3C2412_DMAREQSEL_I2STX		S3C2412_DMAREQSEL_SRC(4)
+#define S3C2412_DMAREQSEL_I2SRX		S3C2412_DMAREQSEL_SRC(5)
+#define S3C2412_DMAREQSEL_TIMER		S3C2412_DMAREQSEL_SRC(9)
+#define S3C2412_DMAREQSEL_SDI		S3C2412_DMAREQSEL_SRC(10)
+#define S3C2412_DMAREQSEL_USBEP1	S3C2412_DMAREQSEL_SRC(13)
+#define S3C2412_DMAREQSEL_USBEP2	S3C2412_DMAREQSEL_SRC(14)
+#define S3C2412_DMAREQSEL_USBEP3	S3C2412_DMAREQSEL_SRC(15)
+#define S3C2412_DMAREQSEL_USBEP4	S3C2412_DMAREQSEL_SRC(16)
+#define S3C2412_DMAREQSEL_XDREQ0	S3C2412_DMAREQSEL_SRC(17)
+#define S3C2412_DMAREQSEL_XDREQ1	S3C2412_DMAREQSEL_SRC(18)
+#define S3C2412_DMAREQSEL_UART0_0	S3C2412_DMAREQSEL_SRC(19)
+#define S3C2412_DMAREQSEL_UART0_1	S3C2412_DMAREQSEL_SRC(20)
+#define S3C2412_DMAREQSEL_UART1_0	S3C2412_DMAREQSEL_SRC(21)
+#define S3C2412_DMAREQSEL_UART1_1	S3C2412_DMAREQSEL_SRC(22)
+#define S3C2412_DMAREQSEL_UART2_0	S3C2412_DMAREQSEL_SRC(23)
+#define S3C2412_DMAREQSEL_UART2_1	S3C2412_DMAREQSEL_SRC(24)
+
+#endif
+
+#define S3C2443_DMAREQSEL_SRC(x)	((x)<<1)
+
+#define S3C2443_DMAREQSEL_HW		(1)
+
+#define S3C2443_DMAREQSEL_SPI0TX	S3C2443_DMAREQSEL_SRC(0)
+#define S3C2443_DMAREQSEL_SPI0RX	S3C2443_DMAREQSEL_SRC(1)
+#define S3C2443_DMAREQSEL_SPI1TX	S3C2443_DMAREQSEL_SRC(2)
+#define S3C2443_DMAREQSEL_SPI1RX	S3C2443_DMAREQSEL_SRC(3)
+#define S3C2443_DMAREQSEL_I2STX		S3C2443_DMAREQSEL_SRC(4)
+#define S3C2443_DMAREQSEL_I2SRX		S3C2443_DMAREQSEL_SRC(5)
+#define S3C2443_DMAREQSEL_TIMER		S3C2443_DMAREQSEL_SRC(9)
+#define S3C2443_DMAREQSEL_SDI		S3C2443_DMAREQSEL_SRC(10)
+#define S3C2443_DMAREQSEL_XDREQ0	S3C2443_DMAREQSEL_SRC(17)
+#define S3C2443_DMAREQSEL_XDREQ1	S3C2443_DMAREQSEL_SRC(18)
+#define S3C2443_DMAREQSEL_UART0_0	S3C2443_DMAREQSEL_SRC(19)
+#define S3C2443_DMAREQSEL_UART0_1	S3C2443_DMAREQSEL_SRC(20)
+#define S3C2443_DMAREQSEL_UART1_0	S3C2443_DMAREQSEL_SRC(21)
+#define S3C2443_DMAREQSEL_UART1_1	S3C2443_DMAREQSEL_SRC(22)
+#define S3C2443_DMAREQSEL_UART2_0	S3C2443_DMAREQSEL_SRC(23)
+#define S3C2443_DMAREQSEL_UART2_1	S3C2443_DMAREQSEL_SRC(24)
+#define S3C2443_DMAREQSEL_UART3_0	S3C2443_DMAREQSEL_SRC(25)
+#define S3C2443_DMAREQSEL_UART3_1	S3C2443_DMAREQSEL_SRC(26)
+#define S3C2443_DMAREQSEL_PCMOUT	S3C2443_DMAREQSEL_SRC(27)
+#define S3C2443_DMAREQSEL_PCMIN 	S3C2443_DMAREQSEL_SRC(28)
+#define S3C2443_DMAREQSEL_MICIN		S3C2443_DMAREQSEL_SRC(29)
+
+#endif /* __ASM_ARCH_DMA_H */