rt-thread/bsp/dm365/platform/edma.h

/*
 * File      : edma.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006, RT-Thread Development Team
 *
 *  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 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author		Notes
 * 2010-11-13     weety		first version
 */

/*
 * 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_

#include <rtthread.h>
#include <dm36x.h>

#ifdef RT_EDMA_DEBUG
#define edma_dbg(fmt, ...)  rt_kprintf(fmt, ##__VA_ARGS__)
#else
#define edma_dbg(fmt, ...)
#endif


/* 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)

/* DM365 specific EDMA3 Events Information */
enum dm365_edma_ch {
	DM365_DMA_TIMER3_TINT6,
	DM365_DMA_TIMER3_TINT7,
	DM365_DMA_MCBSP_TX = 2,
	DM365_DMA_VCIF_TX = 2,
	DM365_DMA_MCBSP_RX = 3,
	DM365_DMA_VCIF_RX = 3,
	DM365_DMA_VPSS_EVT1,
	DM365_DMA_VPSS_EVT2,
	DM365_DMA_VPSS_EVT3,
	DM365_DMA_VPSS_EVT4,
	DM365_DMA_TIMER2_TINT4,
	DM365_DMA_TIMER2_TINT5,
	DM365_DMA_SPI2XEVT,
	DM365_DMA_SPI2REVT,
	DM365_DMA_IMCOP_IMX0INT = 12,
	DM365_DMA_KALEIDO_ARMINT = 12,
	DM365_DMA_IMCOP_SEQINT,
	DM365_DMA_SPI1XEVT,
	DM365_DMA_SPI1REVT,
	DM365_DMA_SPI0XEVT,
	DM365_DMA_SPI0REVT,
	DM365_DMA_URXEVT0 = 18,
	DM365_DMA_SPI3XEVT = 18,
	DM365_DMA_UTXEVT0 = 19,
	DM365_DMA_SPI3REVT = 19,
	DM365_DMA_URXEVT1,
	DM365_DMA_UTXEVT1,
	DM365_DMA_TIMER4_TINT8,
	DM365_DMA_TIMER4_TINT9,
	DM365_DMA_RTOINT,
	DM365_DMA_GPIONT9,
	DM365_DMA_MMC0RXEVT = 26,
	DM365_DMA_MEMSTK_MSEVT = 26,
	DM365_DMA_MMC0TXEVT,
	DM365_DMA_I2C_ICREVT,
	DM365_DMA_I2C_ICXEVT,
	DM365_DMA_MMC1RXEVT,
	DM365_DMA_MMC1TXEVT,
	DM365_DMA_GPIOINT0,
	DM365_DMA_GPIOINT1,
	DM365_DMA_GPIOINT2,
	DM365_DMA_GPIOINT3,
	DM365_DMA_GPIOINT4,
	DM365_DMA_GPIOINT5,
	DM365_DMA_GPIOINT6,
	DM365_DMA_GPIOINT7,
	DM365_DMA_GPIOINT10 = 40,
	DM365_DMA_EMAC_RXTHREESH = 40,
	DM365_DMA_GPIOINT11 = 41,
	DM365_DMA_EMAC_RXPULSE = 41,
	DM365_DMA_GPIOINT12 = 42,
	DM365_DMA_EMAC_TXPULSE = 42,
	DM365_DMA_GPIOINT13 = 43,
	DM365_DMA_EMAC_MISCPULSE = 43,
	DM365_DMA_GPIOINT14 = 44,
	DM365_DMA_SPI4XEVT = 44,
	DM365_DMA_GPIOINT15 = 45,
	DM365_DMA_SPI4REVT = 45,
	DM365_DMA_ADC_ADINT,
	DM365_DMA_GPIOINT8,
	DM365_DMA_TIMER0_TINT0,
	DM365_DMA_TIMER0_TINT1,
	DM365_DMA_TIMER1_TINT2,
	DM365_DMA_TIMER1_TINT3,
	DM365_DMA_PWM0,
	DM365_DMA_PWM1 = 53,
	DM365_DMA_IMCOP_IMX1INT = 53,
	DM365_DMA_PWM2 = 54,
	DM365_DMA_IMCOP_NSFINT = 54,
	DM365_DMA_PWM3 = 55,
	DM365_DMA_KALEIDO6_CP_UNDEF = 55,
	DM365_DMA_IMCOP_VLCDINT = 56,
	DM365_DMA_KALEIDO5_CP_ECDCMP = 56,
	DM365_DMA_IMCOP_BIMINT = 57,
	DM365_DMA_KALEIDO8_CP_ME = 57,
	DM365_DMA_IMCOP_DCTINT = 58,
	DM365_DMA_KALEIDO1_CP_CALC = 58,
	DM365_DMA_IMCOP_QIQINT = 59,
	DM365_DMA_KALEIDO7_CP_IPE = 59,
	DM365_DMA_IMCOP_BPSINT = 60,
	DM365_DMA_KALEIDO2_CP_BS = 60,
	DM365_DMA_IMCOP_VLCDERRINT = 61,
	DM365_DMA_KALEIDO0_CP_LPF = 61,
	DM365_DMA_IMCOP_RCNTINT = 62,
	DM365_DMA_KALEIDO3_CP_MC = 62,
	DM365_DMA_IMCOP_COPCINT = 63,
	DM365_DMA_KALEIDO4_CP_ECDEND = 63,
};
/* end DM365 specific info */


/*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_2 = 2,
	EVENTQ_3 = 3,
	EVENTQ_DEFAULT = -1
};

enum sync_dimension {
	ASYNC = 0,
	ABSYNC = 1
};

#define EDMA_CTLR_CHAN(ctlr, chan)	(((ctlr) << 16) | (chan))
#define EDMA_CTLR(i)			((i) >> 16)
#define EDMA_CHAN_SLOT(i)		((i) & 0xffff)

#define EDMA_CHANNEL_ANY		-1	/* for edma_alloc_channel() */
#define EDMA_SLOT_ANY			-1	/* for edma_alloc_slot() */
#define EDMA_CONT_PARAMS_ANY		 1001
#define EDMA_CONT_PARAMS_FIXED_EXACT	 1002
#define EDMA_CONT_PARAMS_FIXED_NOT_EXACT 1003

#define EDMA_MAX_CC               2

/* alloc/free DMA channels and their dedicated parameter RAM slots */
int edma_alloc_channel(int channel,
	void (*callback)(unsigned channel, rt_uint16_t 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(unsigned ctlr, int slot);
void edma_free_slot(unsigned slot);

/* alloc/free a set of contiguous parameter RAM slots */
int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count);
int edma_free_cont_slots(unsigned slot, int count);

/* calls that operate on part of a parameter RAM slot */
void edma_set_src(unsigned slot, rt_uint32_t src_port,
				enum address_mode mode, enum fifo_width);
void edma_set_dest(unsigned slot, rt_uint32_t dest_port,
				 enum address_mode mode, enum fifo_width);
void edma_get_position(unsigned slot, rt_uint32_t *src, rt_uint32_t *dst);
void edma_set_src_index(unsigned slot, rt_int16_t src_bidx, rt_int16_t src_cidx);
void edma_set_dest_index(unsigned slot, rt_int16_t dest_bidx, rt_int16_t dest_cidx);
void edma_set_transfer_params(unsigned slot, rt_uint16_t acnt, rt_uint16_t bcnt, rt_uint16_t ccnt,
		rt_uint16_t 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);


struct edma_rsv_info {

	const rt_int16_t	(*rsv_chans)[2];
	const rt_int16_t	(*rsv_slots)[2];
};

/* 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;
	unsigned	n_cc;
	enum dma_event_q	default_queue;

	/* Resource reservation for other cores */
	struct edma_rsv_info	*rsv;

	const rt_int8_t	(*queue_tc_mapping)[2];
	const rt_int8_t	(*queue_priority_mapping)[2];
};

int edma_init(struct edma_soc_info **info);


#endif