--- /dev/null
+/*
+ * TI DAVINCI dma definitions
+ *
+ * Copyright (C) 2006-2009 Texas Instruments.
+ *
+ * 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 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 AUTHOR 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.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/*
+ * This EDMA3 programming framework exposes two basic kinds of resource:
+ *
+ * Channel Triggers transfers, usually from a hardware event but
+ * also manually or by "chaining" from DMA completions.
+ * Each channel is coupled to a Parameter RAM (PaRAM) slot.
+ *
+ * Slot Each PaRAM slot holds a DMA transfer descriptor (PaRAM
+ * "set"), source and destination addresses, a link to a
+ * next PaRAM slot (if any), options for the transfer, and
+ * instructions for updating those addresses. There are
+ * more than twice as many slots as event channels.
+ *
+ * Each PaRAM set describes a sequence of transfers, either for one large
+ * buffer or for several discontiguous smaller buffers. An EDMA transfer
+ * is driven only from a channel, which performs the transfers specified
+ * in its PaRAM slot until there are no more transfers. When that last
+ * transfer completes, the "link" field may be used to reload the channel's
+ * PaRAM slot with a new transfer descriptor.
+ *
+ * The EDMA Channel Controller (CC) maps requests from channels into physical
+ * Transfer Controller (TC) requests when the channel triggers (by hardware
+ * or software events, or by chaining). The two physical DMA channels provided
+ * by the TCs are thus shared by many logical channels.
+ *
+ * DaVinci hardware also has a "QDMA" mechanism which is not currently
+ * supported through this interface. (DSP firmware uses it though.)
+ */
+
+#ifndef EDMA_H_
+#define EDMA_H_
+
+/* PaRAM slots are laid out like this */
+struct edmacc_param {
+ unsigned int opt;
+ unsigned int src;
+ unsigned int a_b_cnt;
+ unsigned int dst;
+ unsigned int src_dst_bidx;
+ unsigned int link_bcntrld;
+ unsigned int src_dst_cidx;
+ unsigned int ccnt;
+};
+
+#define CCINT0_INTERRUPT 16
+#define CCERRINT_INTERRUPT 17
+#define TCERRINT0_INTERRUPT 18
+#define TCERRINT1_INTERRUPT 19
+
+/* fields in edmacc_param.opt */
+#define SAM BIT(0)
+#define DAM BIT(1)
+#define SYNCDIM BIT(2)
+#define STATIC BIT(3)
+#define EDMA_FWID (0x07 << 8)
+#define TCCMODE BIT(11)
+#define EDMA_TCC(t) ((t) << 12)
+#define TCINTEN BIT(20)
+#define ITCINTEN BIT(21)
+#define TCCHEN BIT(22)
+#define ITCCHEN BIT(23)
+
+#define TRWORD (0x7<<2)
+#define PAENTRY (0x1ff<<5)
+
+/* Drivers should avoid using these symbolic names for dm644x
+ * channels, and use platform_device IORESOURCE_DMA resources
+ * instead. (Other DaVinci chips have different peripherals
+ * and thus have different DMA channel mappings.)
+ */
+#define DAVINCI_DMA_MCBSP_TX 2
+#define DAVINCI_DMA_MCBSP_RX 3
+#define DAVINCI_DMA_VPSS_HIST 4
+#define DAVINCI_DMA_VPSS_H3A 5
+#define DAVINCI_DMA_VPSS_PRVU 6
+#define DAVINCI_DMA_VPSS_RSZ 7
+#define DAVINCI_DMA_IMCOP_IMXINT 8
+#define DAVINCI_DMA_IMCOP_VLCDINT 9
+#define DAVINCI_DMA_IMCO_PASQINT 10
+#define DAVINCI_DMA_IMCOP_DSQINT 11
+#define DAVINCI_DMA_SPI_SPIX 16
+#define DAVINCI_DMA_SPI_SPIR 17
+#define DAVINCI_DMA_UART0_URXEVT0 18
+#define DAVINCI_DMA_UART0_UTXEVT0 19
+#define DAVINCI_DMA_UART1_URXEVT1 20
+#define DAVINCI_DMA_UART1_UTXEVT1 21
+#define DAVINCI_DMA_UART2_URXEVT2 22
+#define DAVINCI_DMA_UART2_UTXEVT2 23
+#define DAVINCI_DMA_MEMSTK_MSEVT 24
+#define DAVINCI_DMA_MMCRXEVT 26
+#define DAVINCI_DMA_MMCTXEVT 27
+#define DAVINCI_DMA_I2C_ICREVT 28
+#define DAVINCI_DMA_I2C_ICXEVT 29
+#define DAVINCI_DMA_GPIO_GPINT0 32
+#define DAVINCI_DMA_GPIO_GPINT1 33
+#define DAVINCI_DMA_GPIO_GPINT2 34
+#define DAVINCI_DMA_GPIO_GPINT3 35
+#define DAVINCI_DMA_GPIO_GPINT4 36
+#define DAVINCI_DMA_GPIO_GPINT5 37
+#define DAVINCI_DMA_GPIO_GPINT6 38
+#define DAVINCI_DMA_GPIO_GPINT7 39
+#define DAVINCI_DMA_GPIO_GPBNKINT0 40
+#define DAVINCI_DMA_GPIO_GPBNKINT1 41
+#define DAVINCI_DMA_GPIO_GPBNKINT2 42
+#define DAVINCI_DMA_GPIO_GPBNKINT3 43
+#define DAVINCI_DMA_GPIO_GPBNKINT4 44
+#define DAVINCI_DMA_TIMER0_TINT0 48
+#define DAVINCI_DMA_TIMER1_TINT1 49
+#define DAVINCI_DMA_TIMER2_TINT2 50
+#define DAVINCI_DMA_TIMER3_TINT3 51
+#define DAVINCI_DMA_PWM0 52
+#define DAVINCI_DMA_PWM1 53
+#define DAVINCI_DMA_PWM2 54
+
+/*ch_status paramater of callback function possible values*/
+#define DMA_COMPLETE 1
+#define DMA_CC_ERROR 2
+#define DMA_TC1_ERROR 3
+#define DMA_TC2_ERROR 4
+
+enum address_mode {
+ INCR = 0,
+ FIFO = 1
+};
+
+enum fifo_width {
+ W8BIT = 0,
+ W16BIT = 1,
+ W32BIT = 2,
+ W64BIT = 3,
+ W128BIT = 4,
+ W256BIT = 5
+};
+
+enum dma_event_q {
+ EVENTQ_0 = 0,
+ EVENTQ_1 = 1,
+ EVENTQ_DEFAULT = -1
+};
+
+enum sync_dimension {
+ ASYNC = 0,
+ ABSYNC = 1
+};
+
+#define EDMA_CHANNEL_ANY -1 /* for edma_alloc_channel() */
+#define EDMA_SLOT_ANY -1 /* for edma_alloc_slot() */
+
+/* alloc/free DMA channels and their dedicated parameter RAM slots */
+int edma_alloc_channel(int channel,
+ void (*callback)(unsigned channel, u16 ch_status, void *data),
+ void *data, enum dma_event_q);
+void edma_free_channel(unsigned channel);
+
+/* alloc/free parameter RAM slots */
+int edma_alloc_slot(int slot);
+void edma_free_slot(unsigned slot);
+
+/* calls that operate on part of a parameter RAM slot */
+void edma_set_src(unsigned slot, dma_addr_t src_port,
+ enum address_mode mode, enum fifo_width);
+void edma_set_dest(unsigned slot, dma_addr_t dest_port,
+ enum address_mode mode, enum fifo_width);
+void edma_get_position(unsigned slot, dma_addr_t *src, dma_addr_t *dst);
+void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx);
+void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx);
+void edma_set_transfer_params(unsigned slot, u16 acnt, u16 bcnt, u16 ccnt,
+ u16 bcnt_rld, enum sync_dimension sync_mode);
+void edma_link(unsigned from, unsigned to);
+void edma_unlink(unsigned from);
+
+/* calls that operate on an entire parameter RAM slot */
+void edma_write_slot(unsigned slot, const struct edmacc_param *params);
+void edma_read_slot(unsigned slot, struct edmacc_param *params);
+
+/* channel control operations */
+int edma_start(unsigned channel);
+void edma_stop(unsigned channel);
+void edma_clean_channel(unsigned channel);
+void edma_clear_event(unsigned channel);
+void edma_pause(unsigned channel);
+void edma_resume(unsigned channel);
+
+/* UNRELATED TO DMA */
+int davinci_alloc_iram(unsigned size);
+void davinci_free_iram(unsigned addr, unsigned size);
+
+/* platform_data for EDMA driver */
+struct edma_soc_info {
+
+ /* how many dma resources of each type */
+ unsigned n_channel;
+ unsigned n_region;
+ unsigned n_slot;
+ unsigned n_tc;
+
+ /* list of channels with no even trigger; terminated by "-1" */
+ const s8 *noevent;
+};
+
+#endif
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