static int da8xx_rproc_probe()

in da8xx_remoteproc.c [236:358]

• 96 lines of code
• 16 McCabe index (conditional complexity)

static int da8xx_rproc_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct da8xx_rproc *drproc;
	struct rproc *rproc;
	struct irq_data *irq_data;
	struct resource *bootreg_res;
	struct resource *chipsig_res;
	struct clk *dsp_clk;
	struct reset_control *dsp_reset;
	void __iomem *chipsig;
	void __iomem *bootreg;
	int irq;
	int ret;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return irq;

	irq_data = irq_get_irq_data(irq);
	if (!irq_data) {
		dev_err(dev, "irq_get_irq_data(%d): NULL\n", irq);
		return -EINVAL;
	}

	bootreg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
						   "host1cfg");
	bootreg = devm_ioremap_resource(dev, bootreg_res);
	if (IS_ERR(bootreg))
		return PTR_ERR(bootreg);

	chipsig_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
						   "chipsig");
	chipsig = devm_ioremap_resource(dev, chipsig_res);
	if (IS_ERR(chipsig))
		return PTR_ERR(chipsig);

	dsp_clk = devm_clk_get(dev, NULL);
	if (IS_ERR(dsp_clk)) {
		dev_err(dev, "clk_get error: %ld\n", PTR_ERR(dsp_clk));

		return PTR_ERR(dsp_clk);
	}

	dsp_reset = devm_reset_control_get_exclusive(dev, NULL);
	if (IS_ERR(dsp_reset)) {
		if (PTR_ERR(dsp_reset) != -EPROBE_DEFER)
			dev_err(dev, "unable to get reset control: %ld\n",
				PTR_ERR(dsp_reset));

		return PTR_ERR(dsp_reset);
	}

	if (dev->of_node) {
		ret = of_reserved_mem_device_init(dev);
		if (ret) {
			dev_err(dev, "device does not have specific CMA pool: %d\n",
				ret);
			return ret;
		}
	}

	rproc = rproc_alloc(dev, "dsp", &da8xx_rproc_ops, da8xx_fw_name,
		sizeof(*drproc));
	if (!rproc) {
		ret = -ENOMEM;
		goto free_mem;
	}

	/* error recovery is not supported at present */
	rproc->recovery_disabled = true;

	drproc = rproc->priv;
	drproc->rproc = rproc;
	drproc->dsp_clk = dsp_clk;
	drproc->dsp_reset = dsp_reset;
	rproc->has_iommu = false;

	ret = da8xx_rproc_get_internal_memories(pdev, drproc);
	if (ret)
		goto free_rproc;

	platform_set_drvdata(pdev, rproc);

	/* everything the ISR needs is now setup, so hook it up */
	ret = devm_request_threaded_irq(dev, irq, da8xx_rproc_callback,
					handle_event, 0, "da8xx-remoteproc",
					rproc);
	if (ret) {
		dev_err(dev, "devm_request_threaded_irq error: %d\n", ret);
		goto free_rproc;
	}

	/*
	 * rproc_add() can end up enabling the DSP's clk with the DSP
	 * *not* in reset, but da8xx_rproc_start() needs the DSP to be
	 * held in reset at the time it is called.
	 */
	ret = reset_control_assert(dsp_reset);
	if (ret)
		goto free_rproc;

	drproc->chipsig = chipsig;
	drproc->bootreg = bootreg;
	drproc->ack_fxn = irq_data->chip->irq_ack;
	drproc->irq_data = irq_data;
	drproc->irq = irq;

	ret = rproc_add(rproc);
	if (ret) {
		dev_err(dev, "rproc_add failed: %d\n", ret);
		goto free_rproc;
	}

	return 0;

free_rproc:
	rproc_free(rproc);
free_mem:
	if (dev->of_node)
		of_reserved_mem_device_release(dev);
	return ret;
}