27 static void snd_gf1_dma_ack(struct snd_gus_card * gus)  in snd_gf1_dma_ack()  argument
31 	spin_lock_irqsave(&gus->reg_lock, flags);  in snd_gf1_dma_ack()
32 	snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL, 0x00);  in snd_gf1_dma_ack()
33 	snd_gf1_look8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL);  in snd_gf1_dma_ack()
34 	spin_unlock_irqrestore(&gus->reg_lock, flags);  in snd_gf1_dma_ack()
37 static void snd_gf1_dma_program(struct snd_gus_card * gus,  in snd_gf1_dma_program()  argument
51 	if (gus->gf1.dma1 > 3) {  in snd_gf1_dma_program()
52 		if (gus->gf1.enh_mode) {  in snd_gf1_dma_program()
73 	if (gus->gf1.dma1 > 3) {  in snd_gf1_dma_program()
78 	snd_gf1_dma_ack(gus);  in snd_gf1_dma_program()
79 …snd_dma_program(gus->gf1.dma1, buf_addr, count, dma_cmd & SNDRV_GF1_DMA_READ ? DMA_MODE_READ : DMA…  in snd_gf1_dma_program()
84 	spin_lock_irqsave(&gus->reg_lock, flags);  in snd_gf1_dma_program()
85 	if (gus->gf1.enh_mode) {  in snd_gf1_dma_program()
87 		snd_gf1_write16(gus, SNDRV_GF1_GW_DRAM_DMA_LOW, (unsigned short) (address >> 4));  in snd_gf1_dma_program()
88 		snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_HIGH, (unsigned char) address_high);  in snd_gf1_dma_program()
90 		snd_gf1_write16(gus, SNDRV_GF1_GW_DRAM_DMA_LOW, (unsigned short) (address >> 4));  in snd_gf1_dma_program()
91 	snd_gf1_write8(gus, SNDRV_GF1_GB_DRAM_DMA_CONTROL, dma_cmd);  in snd_gf1_dma_program()
92 	spin_unlock_irqrestore(&gus->reg_lock, flags);  in snd_gf1_dma_program()
95 static struct snd_gf1_dma_block *snd_gf1_dma_next_block(struct snd_gus_card * gus)  in snd_gf1_dma_next_block()  argument
100 	if (gus->gf1.dma_data_pcm) {  in snd_gf1_dma_next_block()
101 		block = gus->gf1.dma_data_pcm;  in snd_gf1_dma_next_block()
102 		if (gus->gf1.dma_data_pcm_last == block) {  in snd_gf1_dma_next_block()
103 			gus->gf1.dma_data_pcm =  in snd_gf1_dma_next_block()
104 			gus->gf1.dma_data_pcm_last = NULL;  in snd_gf1_dma_next_block()
106 			gus->gf1.dma_data_pcm = block->next;  in snd_gf1_dma_next_block()
108 	} else if (gus->gf1.dma_data_synth) {  in snd_gf1_dma_next_block()
109 		block = gus->gf1.dma_data_synth;  in snd_gf1_dma_next_block()
110 		if (gus->gf1.dma_data_synth_last == block) {  in snd_gf1_dma_next_block()
111 			gus->gf1.dma_data_synth =  in snd_gf1_dma_next_block()
112 			gus->gf1.dma_data_synth_last = NULL;  in snd_gf1_dma_next_block()
114 			gus->gf1.dma_data_synth = block->next;  in snd_gf1_dma_next_block()
120 		gus->gf1.dma_ack = block->ack;  in snd_gf1_dma_next_block()
121 		gus->gf1.dma_private_data = block->private_data;  in snd_gf1_dma_next_block()
127 static void snd_gf1_dma_interrupt(struct snd_gus_card * gus)  in snd_gf1_dma_interrupt()  argument
131 	snd_gf1_dma_ack(gus);  in snd_gf1_dma_interrupt()
132 	if (gus->gf1.dma_ack)  in snd_gf1_dma_interrupt()
133 		gus->gf1.dma_ack(gus, gus->gf1.dma_private_data);  in snd_gf1_dma_interrupt()
134 	spin_lock(&gus->dma_lock);  in snd_gf1_dma_interrupt()
135 	if (gus->gf1.dma_data_pcm == NULL &&  in snd_gf1_dma_interrupt()
136 	    gus->gf1.dma_data_synth == NULL) {  in snd_gf1_dma_interrupt()
137 	    	gus->gf1.dma_ack = NULL;  in snd_gf1_dma_interrupt()
138 		gus->gf1.dma_flags &= ~SNDRV_GF1_DMA_TRIGGER;  in snd_gf1_dma_interrupt()
139 		spin_unlock(&gus->dma_lock);  in snd_gf1_dma_interrupt()
142 	block = snd_gf1_dma_next_block(gus);  in snd_gf1_dma_interrupt()
143 	spin_unlock(&gus->dma_lock);  in snd_gf1_dma_interrupt()
144 	snd_gf1_dma_program(gus, block->addr, block->buf_addr, block->count, (unsigned short) block->cmd);  in snd_gf1_dma_interrupt()
153 int snd_gf1_dma_init(struct snd_gus_card * gus)  in snd_gf1_dma_init()  argument
155 	mutex_lock(&gus->dma_mutex);  in snd_gf1_dma_init()
156 	gus->gf1.dma_shared++;  in snd_gf1_dma_init()
157 	if (gus->gf1.dma_shared > 1) {  in snd_gf1_dma_init()
158 		mutex_unlock(&gus->dma_mutex);  in snd_gf1_dma_init()
161 	gus->gf1.interrupt_handler_dma_write = snd_gf1_dma_interrupt;  in snd_gf1_dma_init()
162 	gus->gf1.dma_data_pcm =   in snd_gf1_dma_init()
163 	gus->gf1.dma_data_pcm_last =  in snd_gf1_dma_init()
164 	gus->gf1.dma_data_synth =   in snd_gf1_dma_init()
165 	gus->gf1.dma_data_synth_last = NULL;  in snd_gf1_dma_init()
166 	mutex_unlock(&gus->dma_mutex);  in snd_gf1_dma_init()
170 int snd_gf1_dma_done(struct snd_gus_card * gus)  in snd_gf1_dma_done()  argument
174 	mutex_lock(&gus->dma_mutex);  in snd_gf1_dma_done()
175 	gus->gf1.dma_shared--;  in snd_gf1_dma_done()
176 	if (!gus->gf1.dma_shared) {  in snd_gf1_dma_done()
177 		snd_dma_disable(gus->gf1.dma1);  in snd_gf1_dma_done()
178 		snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_WRITE);  in snd_gf1_dma_done()
179 		snd_gf1_dma_ack(gus);  in snd_gf1_dma_done()
180 		while ((block = gus->gf1.dma_data_pcm)) {  in snd_gf1_dma_done()
181 			gus->gf1.dma_data_pcm = block->next;  in snd_gf1_dma_done()
184 		while ((block = gus->gf1.dma_data_synth)) {  in snd_gf1_dma_done()
185 			gus->gf1.dma_data_synth = block->next;  in snd_gf1_dma_done()
188 		gus->gf1.dma_data_pcm_last =  in snd_gf1_dma_done()
189 		gus->gf1.dma_data_synth_last = NULL;  in snd_gf1_dma_done()
191 	mutex_unlock(&gus->dma_mutex);  in snd_gf1_dma_done()
195 int snd_gf1_dma_transfer_block(struct snd_gus_card * gus,  in snd_gf1_dma_transfer_block()  argument
216 		    (long)gus->gf1.dma_data_pcm_last);  in snd_gf1_dma_transfer_block()
218 		    (long)gus->gf1.dma_data_pcm);  in snd_gf1_dma_transfer_block()
220 	spin_lock_irqsave(&gus->dma_lock, flags);  in snd_gf1_dma_transfer_block()
222 		if (gus->gf1.dma_data_synth_last) {  in snd_gf1_dma_transfer_block()
223 			gus->gf1.dma_data_synth_last->next = block;  in snd_gf1_dma_transfer_block()
224 			gus->gf1.dma_data_synth_last = block;  in snd_gf1_dma_transfer_block()
226 			gus->gf1.dma_data_synth =   in snd_gf1_dma_transfer_block()
227 			gus->gf1.dma_data_synth_last = block;  in snd_gf1_dma_transfer_block()
230 		if (gus->gf1.dma_data_pcm_last) {  in snd_gf1_dma_transfer_block()
231 			gus->gf1.dma_data_pcm_last->next = block;  in snd_gf1_dma_transfer_block()
232 			gus->gf1.dma_data_pcm_last = block;  in snd_gf1_dma_transfer_block()
234 			gus->gf1.dma_data_pcm =   in snd_gf1_dma_transfer_block()
235 			gus->gf1.dma_data_pcm_last = block;  in snd_gf1_dma_transfer_block()
238 	if (!(gus->gf1.dma_flags & SNDRV_GF1_DMA_TRIGGER)) {  in snd_gf1_dma_transfer_block()
239 		gus->gf1.dma_flags |= SNDRV_GF1_DMA_TRIGGER;  in snd_gf1_dma_transfer_block()
240 		block = snd_gf1_dma_next_block(gus);  in snd_gf1_dma_transfer_block()
241 		spin_unlock_irqrestore(&gus->dma_lock, flags);  in snd_gf1_dma_transfer_block()
244 		snd_gf1_dma_program(gus, block->addr, block->buf_addr, block->count, (unsigned short) block->cmd);  in snd_gf1_dma_transfer_block()
248 	spin_unlock_irqrestore(&gus->dma_lock, flags);  in snd_gf1_dma_transfer_block()