static int pruss_remove(struct platform_device *dev) { struct uio_pruss_dev *gdev = platform_get_drvdata(dev); pruss_cleanup(dev, gdev); return 0; }
static int __devinit pruss_probe(struct platform_device *dev) { struct uio_info *p; struct uio_pruss_dev *gdev; struct resource *regs_prussio; int ret = -ENODEV, cnt = 0, len; struct uio_pruss_pdata *pdata = dev->dev.platform_data; gdev = kzalloc(sizeof(struct uio_pruss_dev), GFP_KERNEL); if (!gdev) return -ENOMEM; gdev->info = kzalloc(sizeof(*p) * MAX_PRUSS_EVT, GFP_KERNEL); if (!gdev->info) { kfree(gdev); return -ENOMEM; } /* Power on PRU in case its not done as part of boot-loader */ gdev->pruss_clk = clk_get(&dev->dev, "pruss"); if (IS_ERR(gdev->pruss_clk)) { dev_err(&dev->dev, "Failed to get clock\n"); kfree(gdev->info); kfree(gdev); ret = PTR_ERR(gdev->pruss_clk); return ret; } else { clk_enable(gdev->pruss_clk); } regs_prussio = platform_get_resource(dev, IORESOURCE_MEM, 0); if (!regs_prussio) { dev_err(&dev->dev, "No PRUSS I/O resource specified\n"); goto out_free; } if (!regs_prussio->start) { dev_err(&dev->dev, "Invalid memory resource\n"); goto out_free; } gdev->sram_vaddr = (void *)gen_pool_alloc(davinci_gen_pool, sram_pool_sz); if (!gdev->sram_vaddr) { dev_err(&dev->dev, "Could not allocate SRAM pool\n"); goto out_free; } gdev->sram_paddr = gen_pool_virt_to_phys(davinci_gen_pool, (unsigned long)gdev->sram_vaddr); gdev->ddr_vaddr = dma_alloc_coherent(&dev->dev, extram_pool_sz, &(gdev->ddr_paddr), GFP_KERNEL | GFP_DMA); if (!gdev->ddr_vaddr) { dev_err(&dev->dev, "Could not allocate external memory\n"); goto out_free; } len = resource_size(regs_prussio); gdev->prussio_vaddr = ioremap(regs_prussio->start, len); if (!gdev->prussio_vaddr) { dev_err(&dev->dev, "Can't remap PRUSS I/O address range\n"); goto out_free; } gdev->pintc_base = pdata->pintc_base; gdev->hostirq_start = platform_get_irq(dev, 0); for (cnt = 0, p = gdev->info; cnt < MAX_PRUSS_EVT; cnt++, p++) { p->mem[0].addr = regs_prussio->start; p->mem[0].size = resource_size(regs_prussio); p->mem[0].memtype = UIO_MEM_PHYS; p->mem[1].addr = gdev->sram_paddr; p->mem[1].size = sram_pool_sz; p->mem[1].memtype = UIO_MEM_PHYS; p->mem[2].addr = gdev->ddr_paddr; p->mem[2].size = extram_pool_sz; p->mem[2].memtype = UIO_MEM_PHYS; p->name = kasprintf(GFP_KERNEL, "pruss_evt%d", cnt); p->version = DRV_VERSION; /* Register PRUSS IRQ lines */ p->irq = gdev->hostirq_start + cnt; p->handler = pruss_handler; p->priv = gdev; ret = uio_register_device(&dev->dev, p); if (ret < 0) goto out_free; } platform_set_drvdata(dev, gdev); return 0; out_free: pruss_cleanup(dev, gdev); return ret; }