spi: reorganize drivers

Sort the SPI makefile and enforce the naming convention spi_*.c for
spi drivers.

This change also rolls the contents of atmel_spi.h into the .c file
since there is only one user of that particular include file.

v2: - Use 'spi-' prefix instead of 'spi_' to match what seems to be
      be the predominant pattern for subsystem prefixes.
    - Clean up filenames in Kconfig and header comment blocks

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 180 insertions, 0 deletions

diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c
new file mode 100644
index 000000000000..378e504f89eb
--- /dev/null
+++ b/drivers/spi/spi-pxa2xx-pci.c
@@ -0,0 +1,180 @@
+/*
+ * CE4100's SPI device is more or less the same one as found on PXA
+ *
+ */
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <linux/spi/pxa2xx_spi.h>
+
+struct ce4100_info {
+	struct ssp_device ssp;
+	struct platform_device *spi_pdev;
+};
+
+static DEFINE_MUTEX(ssp_lock);
+static LIST_HEAD(ssp_list);
+
+struct ssp_device *pxa_ssp_request(int port, const char *label)
+{
+	struct ssp_device *ssp = NULL;
+
+	mutex_lock(&ssp_lock);
+
+	list_for_each_entry(ssp, &ssp_list, node) {
+		if (ssp->port_id == port && ssp->use_count == 0) {
+			ssp->use_count++;
+			ssp->label = label;
+			break;
+		}
+	}
+
+	mutex_unlock(&ssp_lock);
+
+	if (&ssp->node == &ssp_list)
+		return NULL;
+
+	return ssp;
+}
+EXPORT_SYMBOL_GPL(pxa_ssp_request);
+
+void pxa_ssp_free(struct ssp_device *ssp)
+{
+	mutex_lock(&ssp_lock);
+	if (ssp->use_count) {
+		ssp->use_count--;
+		ssp->label = NULL;
+	} else
+		dev_err(&ssp->pdev->dev, "device already free\n");
+	mutex_unlock(&ssp_lock);
+}
+EXPORT_SYMBOL_GPL(pxa_ssp_free);
+
+static int __devinit ce4100_spi_probe(struct pci_dev *dev,
+		const struct pci_device_id *ent)
+{
+	int ret;
+	resource_size_t phys_beg;
+	resource_size_t phys_len;
+	struct ce4100_info *spi_info;
+	struct platform_device *pdev;
+	struct pxa2xx_spi_master spi_pdata;
+	struct ssp_device *ssp;
+
+	ret = pci_enable_device(dev);
+	if (ret)
+		return ret;
+
+	phys_beg = pci_resource_start(dev, 0);
+	phys_len = pci_resource_len(dev, 0);
+
+	if (!request_mem_region(phys_beg, phys_len,
+				"CE4100 SPI")) {
+		dev_err(&dev->dev, "Can't request register space.\n");
+		ret = -EBUSY;
+		return ret;
+	}
+
+	pdev = platform_device_alloc("pxa2xx-spi", dev->devfn);
+	spi_info = kzalloc(sizeof(*spi_info), GFP_KERNEL);
+	if (!pdev || !spi_info ) {
+		ret = -ENOMEM;
+		goto err_nomem;
+	}
+	memset(&spi_pdata, 0, sizeof(spi_pdata));
+	spi_pdata.num_chipselect = dev->devfn;
+
+	ret = platform_device_add_data(pdev, &spi_pdata, sizeof(spi_pdata));
+	if (ret)
+		goto err_nomem;
+
+	pdev->dev.parent = &dev->dev;
+	pdev->dev.of_node = dev->dev.of_node;
+	ssp = &spi_info->ssp;
+	ssp->phys_base = pci_resource_start(dev, 0);
+	ssp->mmio_base = ioremap(phys_beg, phys_len);
+	if (!ssp->mmio_base) {
+		dev_err(&pdev->dev, "failed to ioremap() registers\n");
+		ret = -EIO;
+		goto err_nomem;
+	}
+	ssp->irq = dev->irq;
+	ssp->port_id = pdev->id;
+	ssp->type = PXA25x_SSP;
+
+	mutex_lock(&ssp_lock);
+	list_add(&ssp->node, &ssp_list);
+	mutex_unlock(&ssp_lock);
+
+	pci_set_drvdata(dev, spi_info);
+
+	ret = platform_device_add(pdev);
+	if (ret)
+		goto err_dev_add;
+
+	return ret;
+
+err_dev_add:
+	pci_set_drvdata(dev, NULL);
+	mutex_lock(&ssp_lock);
+	list_del(&ssp->node);
+	mutex_unlock(&ssp_lock);
+	iounmap(ssp->mmio_base);
+
+err_nomem:
+	release_mem_region(phys_beg, phys_len);
+	platform_device_put(pdev);
+	kfree(spi_info);
+	return ret;
+}
+
+static void __devexit ce4100_spi_remove(struct pci_dev *dev)
+{
+	struct ce4100_info *spi_info;
+	struct ssp_device *ssp;
+
+	spi_info = pci_get_drvdata(dev);
+	ssp = &spi_info->ssp;
+	platform_device_unregister(spi_info->spi_pdev);
+
+	iounmap(ssp->mmio_base);
+	release_mem_region(pci_resource_start(dev, 0),
+			pci_resource_len(dev, 0));
+
+	mutex_lock(&ssp_lock);
+	list_del(&ssp->node);
+	mutex_unlock(&ssp_lock);
+
+	pci_set_drvdata(dev, NULL);
+	pci_disable_device(dev);
+	kfree(spi_info);
+}
+
+static struct pci_device_id ce4100_spi_devices[] __devinitdata = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e6a) },
+	{ },
+};
+MODULE_DEVICE_TABLE(pci, ce4100_spi_devices);
+
+static struct pci_driver ce4100_spi_driver = {
+	.name           = "ce4100_spi",
+	.id_table       = ce4100_spi_devices,
+	.probe          = ce4100_spi_probe,
+	.remove         = __devexit_p(ce4100_spi_remove),
+};
+
+static int __init ce4100_spi_init(void)
+{
+	return pci_register_driver(&ce4100_spi_driver);
+}
+module_init(ce4100_spi_init);
+
+static void __exit ce4100_spi_exit(void)
+{
+	pci_unregister_driver(&ce4100_spi_driver);
+}
+module_exit(ce4100_spi_exit);
+
+MODULE_DESCRIPTION("CE4100 PCI-SPI glue code for PXA's driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");