Lines Matching +full:dual +full:- +full:source

1 /* SPDX-License-Identifier: GPL-2.0 */
8  *   ColdFire DMA supports two forms of DMA: Single and Dual address. Single
9  * address mode emits a source address, and expects that the device will either
10  * pick up the data (DMA READ) or source data (DMA WRITE). This implies that
13  * devices will find single mode transfers useful. Dual address DMA mode
14  * performs two cycles: source read and destination write. ColdFire will
19  * AUG/22/2000 : added support for 32-bit Dual-Address-Mode (K) 2000
20  *               Oliver Kamphenkel (O.Kamphenkel@tu-bs.de)
22  * AUG/25/2000 : added support for 8, 16 and 32-bit Single-Address-Mode (K)2000
23  *               Oliver Kamphenkel (O.Kamphenkel@tu-bs.de)
26  *               Arthur Shipkowski (art@videon-central.com)
56 #define DMA_MODE_SINGLE_BIT 0x08  /* single-address-mode */
70 /* I/O to memory, 8 bits, single-address-mode */
72 /* memory to I/O, 8 bits, single-address-mode */
74 /* I/O to memory, 16 bits, single-address-mode */
76 /* memory to I/O, 16 bits, single-address-mode */
78 /* I/O to memory, 32 bits, single-address-mode */
80 /* memory to I/O, 32 bits, single-address-mode */
85 /* Source static-address mode */
91 /* Destination static-address mode */
159  * After that, keep track of it. :-)
160  * --- In order to do that, the DMA routines below should ---
161  * --- only be used while interrupts are disabled! ---
191     /* single-address-mode */  in set_dma_mode()
193     /* sets s_rw (-> r/w) high if Memory to I/0 */  in set_dma_mode()
227     /* Source incrementing, must be memory */  in set_dma_addr()
234     /* Set source address, must be device */  in set_dma_addr()
247  * Specific for Coldfire - sets device address.
297  * in terms of register mapping.  For instance, with the exception of the 16-bit
298  * interrupt register (IRQ#85, for reference), all of the registers are 32-bit.
300  * The big difference, however, is the lack of device-requested DMA.  All modes
301  * are dual address transfer, and there is no 'device' setup or direction bit.
303  * two devices directly, with any combination of incrementing and non-incrementing
308  * which will act exactly as above in -- it will look to see if the source is set to
309  * autoincrement, and if so it will make the source use the set_dma_addr value and the
310  * destination the set_dma_device_addr value.  Otherwise the source will be set to the
350  * After that, keep track of it. :-)
351  * --- In order to do that, the DMA routines below should ---
352  * --- only be used while interrupts are disabled! ---
379     MCFDMA_DMR_DSTT_SD  |         /* Set up addressing types; set to supervisor-data. */  in set_dma_mode()
380     MCFDMA_DMR_SRCT_SD  |         /* Set up addressing types; set to supervisor-data. */  in set_dma_mode()
381     /* source static-address-mode */  in set_dma_mode()
383     /* dest static-address-mode */  in set_dma_mode()
411     /* Source incrementing, must be memory */  in set_dma_addr()
418     /* Set source address, must be device */  in set_dma_addr()
431  * Specific for Coldfire - sets device address.
446  * NOTE 3: While a 32-bit register, "count" is only a maximum 24-bit value.