static __devinit int tegra_i2s_platform_probe(struct platform_device *pdev) { struct tegra_i2s * i2s; char clk_name[12]; /* tegra-i2s.0 */ struct resource *mem, *memregion, *dmareq; int ret; if ((pdev->id < 0) || (pdev->id >= ARRAY_SIZE(tegra_i2s_dai))) { dev_err(&pdev->dev, "ID %d out of range\n", pdev->id); return -EINVAL; } /* * FIXME: Until a codec driver exists for the tegra DAS, hard-code a * 1:1 mapping between audio controllers and audio ports. */ ret = tegra_das_connect_dap_to_dac(TEGRA_DAS_DAP_ID_1 + pdev->id, TEGRA_DAS_DAP_SEL_DAC1 + pdev->id); if (ret) { dev_err(&pdev->dev, "Can't set up DAP connection\n"); return ret; } ret = tegra_das_connect_dac_to_dap(TEGRA_DAS_DAC_ID_1 + pdev->id, TEGRA_DAS_DAC_SEL_DAP1 + pdev->id); if (ret) { dev_err(&pdev->dev, "Can't set up DAC connection\n"); return ret; } i2s = kzalloc(sizeof(struct tegra_i2s), GFP_KERNEL); if (!i2s) { dev_err(&pdev->dev, "Can't allocate tegra_i2s\n"); ret = -ENOMEM; goto exit; } dev_set_drvdata(&pdev->dev, i2s); snprintf(clk_name, sizeof(clk_name), DRV_NAME ".%d", pdev->id); i2s->clk_i2s = clk_get_sys(clk_name, NULL); if (IS_ERR(i2s->clk_i2s)) { dev_err(&pdev->dev, "Can't retrieve i2s clock\n"); ret = PTR_ERR(i2s->clk_i2s); goto err_free; } mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) { dev_err(&pdev->dev, "No memory resource\n"); ret = -ENODEV; goto err_clk_put; } dmareq = platform_get_resource(pdev, IORESOURCE_DMA, 0); if (!dmareq) { dev_err(&pdev->dev, "No DMA resource\n"); ret = -ENODEV; goto err_clk_put; } memregion = request_mem_region(mem->start, resource_size(mem), DRV_NAME); if (!memregion) { dev_err(&pdev->dev, "Memory region already claimed\n"); ret = -EBUSY; goto err_clk_put; } i2s->regs = ioremap(mem->start, resource_size(mem)); if (!i2s->regs) { dev_err(&pdev->dev, "ioremap failed\n"); ret = -ENOMEM; goto err_release; } i2s->capture_dma_data.addr = mem->start + TEGRA_I2S_FIFO2; i2s->capture_dma_data.wrap = 4; i2s->capture_dma_data.width = 32; i2s->capture_dma_data.req_sel = dmareq->start; i2s->playback_dma_data.addr = mem->start + TEGRA_I2S_FIFO1; i2s->playback_dma_data.wrap = 4; i2s->playback_dma_data.width = 32; i2s->playback_dma_data.req_sel = dmareq->start; i2s->reg_ctrl = TEGRA_I2S_CTRL_FIFO_FORMAT_PACKED; ret = snd_soc_register_dai(&pdev->dev, &tegra_i2s_dai[pdev->id]); if (ret) { dev_err(&pdev->dev, "Could not register DAI: %d\n", ret); ret = -ENOMEM; goto err_unmap; } tegra_i2s_debug_add(i2s, pdev->id); return 0; err_unmap: iounmap(i2s->regs); err_release: release_mem_region(mem->start, resource_size(mem)); err_clk_put: clk_put(i2s->clk_i2s); err_free: kfree(i2s); exit: return ret; }
static __devinit int tegra_i2s_platform_probe(struct platform_device *pdev) { struct tegra_i2s * i2s; struct resource *mem, *memregion, *dmareq; u32 of_dma[2]; u32 dma_ch; int ret; i2s = devm_kzalloc(&pdev->dev, sizeof(struct tegra_i2s), GFP_KERNEL); if (!i2s) { dev_err(&pdev->dev, "Can't allocate tegra_i2s\n"); ret = -ENOMEM; goto err; } dev_set_drvdata(&pdev->dev, i2s); i2s->dai = tegra_i2s_dai_template; i2s->dai.name = dev_name(&pdev->dev); i2s->clk_i2s = clk_get(&pdev->dev, NULL); if (IS_ERR(i2s->clk_i2s)) { dev_err(&pdev->dev, "Can't retrieve i2s clock\n"); ret = PTR_ERR(i2s->clk_i2s); goto err; } mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) { dev_err(&pdev->dev, "No memory resource\n"); ret = -ENODEV; goto err_clk_put; } dmareq = platform_get_resource(pdev, IORESOURCE_DMA, 0); if (!dmareq) { if (of_property_read_u32_array(pdev->dev.of_node, "nvidia,dma-request-selector", of_dma, 2) < 0) { dev_err(&pdev->dev, "No DMA resource\n"); ret = -ENODEV; goto err_clk_put; } dma_ch = of_dma[1]; } else { dma_ch = dmareq->start; } memregion = devm_request_mem_region(&pdev->dev, mem->start, resource_size(mem), DRV_NAME); if (!memregion) { dev_err(&pdev->dev, "Memory region already claimed\n"); ret = -EBUSY; goto err_clk_put; } i2s->regs = devm_ioremap(&pdev->dev, mem->start, resource_size(mem)); if (!i2s->regs) { dev_err(&pdev->dev, "ioremap failed\n"); ret = -ENOMEM; goto err_clk_put; } i2s->capture_dma_data.addr = mem->start + TEGRA_I2S_FIFO2; i2s->capture_dma_data.wrap = 4; i2s->capture_dma_data.width = 32; i2s->capture_dma_data.req_sel = dma_ch; i2s->playback_dma_data.addr = mem->start + TEGRA_I2S_FIFO1; i2s->playback_dma_data.wrap = 4; i2s->playback_dma_data.width = 32; i2s->playback_dma_data.req_sel = dma_ch; i2s->reg_ctrl = TEGRA_I2S_CTRL_FIFO_FORMAT_PACKED; ret = snd_soc_register_dai(&pdev->dev, &i2s->dai); if (ret) { dev_err(&pdev->dev, "Could not register DAI: %d\n", ret); ret = -ENOMEM; goto err_clk_put; } tegra_i2s_debug_add(i2s); return 0; err_clk_put: clk_put(i2s->clk_i2s); err: return ret; }