40 static u32 tegra20_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset)  in tegra20_fuse_read_early()  argument
42 	return readl_relaxed(fuse->base + FUSE_BEGIN + offset);  in tegra20_fuse_read_early()
47 	struct tegra_fuse *fuse = args;  in apb_dma_complete()  local
49 	complete(&fuse->apbdma.wait);  in apb_dma_complete()
52 static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset)  in tegra20_fuse_read()  argument
60 	mutex_lock(&fuse->apbdma.lock);  in tegra20_fuse_read()
62 	fuse->apbdma.config.src_addr = fuse->phys + FUSE_BEGIN + offset;  in tegra20_fuse_read()
64 	err = dmaengine_slave_config(fuse->apbdma.chan, &fuse->apbdma.config);  in tegra20_fuse_read()
68 	dma_desc = dmaengine_prep_slave_single(fuse->apbdma.chan,  in tegra20_fuse_read()
69 					       fuse->apbdma.phys,  in tegra20_fuse_read()
76 	dma_desc->callback_param = fuse;  in tegra20_fuse_read()
78 	reinit_completion(&fuse->apbdma.wait);  in tegra20_fuse_read()
80 	clk_prepare_enable(fuse->clk);  in tegra20_fuse_read()
83 	dma_async_issue_pending(fuse->apbdma.chan);  in tegra20_fuse_read()
84 	time_left = wait_for_completion_timeout(&fuse->apbdma.wait,  in tegra20_fuse_read()
88 		dmaengine_terminate_all(fuse->apbdma.chan);  in tegra20_fuse_read()
90 		value = *fuse->apbdma.virt;  in tegra20_fuse_read()
92 	clk_disable_unprepare(fuse->clk);  in tegra20_fuse_read()
95 	mutex_unlock(&fuse->apbdma.lock);  in tegra20_fuse_read()
106 static int tegra20_fuse_probe(struct tegra_fuse *fuse)  in tegra20_fuse_probe()  argument
113 	fuse->apbdma.chan = __dma_request_channel(&mask, dma_filter, NULL);  in tegra20_fuse_probe()
114 	if (!fuse->apbdma.chan)  in tegra20_fuse_probe()
117 	fuse->apbdma.virt = dma_alloc_coherent(fuse->dev, sizeof(u32),  in tegra20_fuse_probe()
118 					       &fuse->apbdma.phys,  in tegra20_fuse_probe()
120 	if (!fuse->apbdma.virt) {  in tegra20_fuse_probe()
121 		dma_release_channel(fuse->apbdma.chan);  in tegra20_fuse_probe()
125 	fuse->apbdma.config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in tegra20_fuse_probe()
126 	fuse->apbdma.config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in tegra20_fuse_probe()
127 	fuse->apbdma.config.src_maxburst = 1;  in tegra20_fuse_probe()
128 	fuse->apbdma.config.dst_maxburst = 1;  in tegra20_fuse_probe()
129 	fuse->apbdma.config.direction = DMA_DEV_TO_MEM;  in tegra20_fuse_probe()
130 	fuse->apbdma.config.device_fc = false;  in tegra20_fuse_probe()
132 	init_completion(&fuse->apbdma.wait);  in tegra20_fuse_probe()
133 	mutex_init(&fuse->apbdma.lock);  in tegra20_fuse_probe()
134 	fuse->read = tegra20_fuse_read;  in tegra20_fuse_probe()
164 static void __init tegra20_fuse_init(struct tegra_fuse *fuse)  in tegra20_fuse_init()  argument
166 	fuse->read_early = tegra20_fuse_read_early;  in tegra20_fuse_init()
169 	fuse->soc->speedo_init(&tegra_sku_info);  in tegra20_fuse_init()