30 static u32 tegra20_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset)  in tegra20_fuse_read_early()  argument
32 	return readl_relaxed(fuse->base + FUSE_BEGIN + offset);  in tegra20_fuse_read_early()
37 	struct tegra_fuse *fuse = args;  in apb_dma_complete()  local
39 	complete(&fuse->apbdma.wait);  in apb_dma_complete()
42 static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset)  in tegra20_fuse_read()  argument
50 	err = pm_runtime_resume_and_get(fuse->dev);  in tegra20_fuse_read()
54 	mutex_lock(&fuse->apbdma.lock);  in tegra20_fuse_read()
56 	fuse->apbdma.config.src_addr = fuse->phys + FUSE_BEGIN + offset;  in tegra20_fuse_read()
58 	err = dmaengine_slave_config(fuse->apbdma.chan, &fuse->apbdma.config);  in tegra20_fuse_read()
62 	dma_desc = dmaengine_prep_slave_single(fuse->apbdma.chan,  in tegra20_fuse_read()
63 					       fuse->apbdma.phys,  in tegra20_fuse_read()
70 	dma_desc->callback_param = fuse;  in tegra20_fuse_read()
72 	reinit_completion(&fuse->apbdma.wait);  in tegra20_fuse_read()
75 	dma_async_issue_pending(fuse->apbdma.chan);  in tegra20_fuse_read()
76 	time_left = wait_for_completion_timeout(&fuse->apbdma.wait,  in tegra20_fuse_read()
80 		dmaengine_terminate_all(fuse->apbdma.chan);  in tegra20_fuse_read()
82 		value = *fuse->apbdma.virt;  in tegra20_fuse_read()
85 	mutex_unlock(&fuse->apbdma.lock);  in tegra20_fuse_read()
86 	pm_runtime_put(fuse->dev);  in tegra20_fuse_read()
99 	struct tegra_fuse *fuse = data;  in tegra20_fuse_release_channel()  local
101 	dma_release_channel(fuse->apbdma.chan);  in tegra20_fuse_release_channel()
102 	fuse->apbdma.chan = NULL;  in tegra20_fuse_release_channel()
107 	struct tegra_fuse *fuse = data;  in tegra20_fuse_free_coherent()  local
109 	dma_free_coherent(fuse->dev, sizeof(u32), fuse->apbdma.virt,  in tegra20_fuse_free_coherent()
110 			  fuse->apbdma.phys);  in tegra20_fuse_free_coherent()
111 	fuse->apbdma.virt = NULL;  in tegra20_fuse_free_coherent()
112 	fuse->apbdma.phys = 0x0;  in tegra20_fuse_free_coherent()
115 static int tegra20_fuse_probe(struct tegra_fuse *fuse)  in tegra20_fuse_probe()  argument
123 	fuse->apbdma.chan = dma_request_channel(mask, dma_filter, NULL);  in tegra20_fuse_probe()
124 	if (!fuse->apbdma.chan)  in tegra20_fuse_probe()
127 	err = devm_add_action_or_reset(fuse->dev, tegra20_fuse_release_channel,  in tegra20_fuse_probe()
128 				       fuse);  in tegra20_fuse_probe()
132 	fuse->apbdma.virt = dma_alloc_coherent(fuse->dev, sizeof(u32),  in tegra20_fuse_probe()
133 					       &fuse->apbdma.phys,  in tegra20_fuse_probe()
135 	if (!fuse->apbdma.virt)  in tegra20_fuse_probe()
138 	err = devm_add_action_or_reset(fuse->dev, tegra20_fuse_free_coherent,  in tegra20_fuse_probe()
139 				       fuse);  in tegra20_fuse_probe()
143 	fuse->apbdma.config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in tegra20_fuse_probe()
144 	fuse->apbdma.config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in tegra20_fuse_probe()
145 	fuse->apbdma.config.src_maxburst = 1;  in tegra20_fuse_probe()
146 	fuse->apbdma.config.dst_maxburst = 1;  in tegra20_fuse_probe()
147 	fuse->apbdma.config.direction = DMA_DEV_TO_MEM;  in tegra20_fuse_probe()
148 	fuse->apbdma.config.device_fc = false;  in tegra20_fuse_probe()
150 	init_completion(&fuse->apbdma.wait);  in tegra20_fuse_probe()
151 	mutex_init(&fuse->apbdma.lock);  in tegra20_fuse_probe()
152 	fuse->read = tegra20_fuse_read;  in tegra20_fuse_probe()
182 static void __init tegra20_fuse_init(struct tegra_fuse *fuse)  in tegra20_fuse_init()  argument
184 	fuse->read_early = tegra20_fuse_read_early;  in tegra20_fuse_init()
187 	fuse->soc->speedo_init(&tegra_sku_info);  in tegra20_fuse_init()