3  *  linux/arch/arm/mach-rpc/dma.c
7  *  DMA functions specific to RiscPC architecture
12 #include <linux/dma-mapping.h>
16 #include <asm/dma.h>
22 #include <asm/mach/dma.h>
26 	struct dma_struct	dma;  member
58 	if (idma->dma.sg) {  in iomd_get_next_sg()
76 			if (idma->dma.sgcount > 1) {  in iomd_get_next_sg()
77 				idma->dma.sg = sg_next(idma->dma.sg);  in iomd_get_next_sg()
78 				idma->dma_addr = idma->dma.sg->dma_address;  in iomd_get_next_sg()
79 				idma->dma_len = idma->dma.sg->length;  in iomd_get_next_sg()
80 				idma->dma.sgcount--;  in iomd_get_next_sg()
82 				idma->dma.sg = NULL;  in iomd_get_next_sg()
134 static int iomd_request_dma(unsigned int chan, dma_t *dma)  in iomd_request_dma()  argument
136 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_request_dma()
139 			   0, idma->dma.device_id, idma);  in iomd_request_dma()
142 static void iomd_free_dma(unsigned int chan, dma_t *dma)  in iomd_free_dma()  argument
144 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_free_dma()
155 static void iomd_enable_dma(unsigned int chan, dma_t *dma)  in iomd_enable_dma()  argument
157 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_enable_dma()
161 	if (idma->dma.invalid) {  in iomd_enable_dma()
162 		idma->dma.invalid = 0;  in iomd_enable_dma()
168 		if (!idma->dma.sg) {  in iomd_enable_dma()
169 			idma->dma.sg = &idma->dma.buf;  in iomd_enable_dma()
170 			idma->dma.sgcount = 1;  in iomd_enable_dma()
171 			idma->dma.buf.length = idma->dma.count;  in iomd_enable_dma()
172 			idma->dma.buf.dma_address = dma_map_single(&isa_dma_dev,  in iomd_enable_dma()
173 				idma->dma.addr, idma->dma.count,  in iomd_enable_dma()
174 				idma->dma.dma_mode == DMA_MODE_READ ?  in iomd_enable_dma()
178 		idma->dma_addr = idma->dma.sg->dma_address;  in iomd_enable_dma()
179 		idma->dma_len = idma->dma.sg->length;  in iomd_enable_dma()
185 	if (idma->dma.dma_mode == DMA_MODE_READ)  in iomd_enable_dma()
192 static void iomd_disable_dma(unsigned int chan, dma_t *dma)  in iomd_disable_dma()  argument
194 	struct iomd_dma *idma = container_of(dma, struct iomd_dma, dma);  in iomd_disable_dma()
205 static int iomd_set_dma_speed(unsigned int chan, dma_t *dma, int cycle)  in iomd_set_dma_speed()  argument
261 	struct dma_struct	dma;  member
265 static void floppy_enable_dma(unsigned int chan, dma_t *dma)  in floppy_enable_dma()  argument
267 	struct floppy_dma *fdma = container_of(dma, struct floppy_dma, dma);  in floppy_enable_dma()
272 	if (fdma->dma.sg)  in floppy_enable_dma()
275 	if (fdma->dma.dma_mode == DMA_MODE_READ) {  in floppy_enable_dma()
285 	regs.ARM_r9  = fdma->dma.count;  in floppy_enable_dma()
286 	regs.ARM_r10 = (unsigned long)fdma->dma.addr;  in floppy_enable_dma()
299 static void floppy_disable_dma(unsigned int chan, dma_t *dma)  in floppy_disable_dma()  argument
301 	struct floppy_dma *fdma = container_of(dma, struct floppy_dma, dma);  in floppy_disable_dma()
306 static int floppy_get_residue(unsigned int chan, dma_t *dma)  in floppy_get_residue()  argument
321  * This is virtual DMA - we don't need anything here.
323 static void sound_enable_disable_dma(unsigned int chan, dma_t *dma)  in sound_enable_disable_dma()  argument
336 	.dma		= {
359 	 * Setup DMA channels 2,3 to be for podules  in rpc_dma_init()
378 		iomd_dma[i].dma.d_ops = &iomd_dma_ops;  in rpc_dma_init()
380 		ret = isa_dma_add(i, &iomd_dma[i].dma);  in rpc_dma_init()
385 	ret = isa_dma_add(DMA_VIRTUAL_FLOPPY, &floppy_dma.dma);  in rpc_dma_init()