drivers/dma/amba-pl08x.c

17  * The PL080 has 8 channels available for simultaneous use, and the PL081
18  * has only two channels. So on these DMA controllers the number of channels
99  * @channels: the number of channels available in this variant
103  *	channels have Nomadik security extension bits that need to be checked
113 	u8 channels;
138  * struct pl08x_phy_chan - holder for the physical channels
223  * channel to become available (only pertains to memcpy channels)
271  * @phy_chans: array of data for the physical channels
825 	for (i = 0; i < pl08x->vd->channels; i++) {
839 	if (i == pl08x->vd->channels) {
917 	list_for_each_entry(p, &pl08x->memcpy.channels, vc.chan.device_node)
925 		list_for_each_entry(p, &pl08x->slave.channels, vc.chan.device_node)
2199 	 * Anything succeeds on channels with no physical allocation and
2222 	 * Anything succeeds on channels with no physical allocation and
2244 	/* Reject channels for devices not bound to this driver */
2267  * TODO: turn this bit on/off depending on the number of physical channels
2303 	for (i = 0; i < pl08x->vd->channels; i++) {
2358  * Initialise the DMAC memcpy/slave channels.
2362 		struct dma_device *dmadev, unsigned int channels, bool slave)
2367 	INIT_LIST_HEAD(&dmadev->channels);
2370 	 * Register as many memcpy as we have physical channels,
2374 	for (i = 0; i < channels; i++) {
2414 	dev_info(&pl08x->adev->dev, "initialized %d virtual %s channels\n",
2425 				 next, &dmadev->channels, vc.chan.device_node) {
2457 	seq_printf(s, "PL08x physical channels:\n");
2460 	for (i = 0; i < pl08x->vd->channels; i++) {
2476 	seq_printf(s, "\nPL08x virtual memcpy channels:\n");
2479 	list_for_each_entry(chan, &pl08x->memcpy.channels, vc.chan.device_node) {
2485 		seq_printf(s, "\nPL08x virtual slave channels:\n");
2488 		list_for_each_entry(chan, &pl08x->slave.channels,
2523 	list_for_each_entry(chan, &pl08x->slave.channels, vc.chan.device_node) {
2655 	 * Allocate channel data for all possible slave channels (one
2656 	 * for each possible signal), channels will then be allocated
2735 		dev_info(&pl08x->adev->dev, "FTDMAC020 %d channels, "
2746 		vd->channels = (val >> 12) & 0x0f;
2857 	/* Initialize physical channels */
2858 	pl08x->phy_chans = kcalloc(vd->channels, sizeof(*pl08x->phy_chans),
2865 	for (i = 0; i < vd->channels; i++) {
2892 		 * Nomadik variants can have channels that are locked
2893 		 * down for the secure world only. Lock up these channels
2910 	/* Register as many memcpy channels as there are physical channels */
2912 					      pl08x->vd->channels, false);
2915 			 "%s failed to enumerate memcpy channels - %d\n",
2920 	/* Register slave channels */
2926 				 "%s failed to enumerate slave channels - %d\n",
2981 /* PL080 has 8 channels and the PL080 have just 2 */
2984 	.channels = 8,
2992 	.channels = 8,
3001 	.channels = 8,
3009 	.channels = 2,