Initial import

1 files changed, 164 insertions, 0 deletions

diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c
new file mode 100644
index 000000000..6d331e0db
--- /dev/null
+++ b/drivers/spi/spi-dw-pci.c
@@ -0,0 +1,164 @@
+/*
+ * PCI interface driver for DW SPI Core
+ *
+ * Copyright (c) 2009, 2014 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+
+#include "spi-dw.h"
+
+#define DRIVER_NAME "dw_spi_pci"
+
+struct dw_spi_pci {
+	struct pci_dev	*pdev;
+	struct dw_spi	dws;
+};
+
+struct spi_pci_desc {
+	int	(*setup)(struct dw_spi *);
+	u16	num_cs;
+	u16	bus_num;
+};
+
+static struct spi_pci_desc spi_pci_mid_desc_1 = {
+	.setup = dw_spi_mid_init,
+	.num_cs = 5,
+	.bus_num = 0,
+};
+
+static struct spi_pci_desc spi_pci_mid_desc_2 = {
+	.setup = dw_spi_mid_init,
+	.num_cs = 2,
+	.bus_num = 1,
+};
+
+static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct dw_spi_pci *dwpci;
+	struct dw_spi *dws;
+	struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data;
+	int pci_bar = 0;
+	int ret;
+
+	ret = pcim_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	dwpci = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_pci),
+			GFP_KERNEL);
+	if (!dwpci)
+		return -ENOMEM;
+
+	dwpci->pdev = pdev;
+	dws = &dwpci->dws;
+
+	/* Get basic io resource and map it */
+	dws->paddr = pci_resource_start(pdev, pci_bar);
+
+	ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
+	if (ret)
+		return ret;
+
+	dws->regs = pcim_iomap_table(pdev)[pci_bar];
+
+	dws->irq = pdev->irq;
+
+	/*
+	 * Specific handling for paltforms, like dma setup,
+	 * clock rate, FIFO depth.
+	 */
+	if (desc) {
+		dws->num_cs = desc->num_cs;
+		dws->bus_num = desc->bus_num;
+
+		if (desc->setup) {
+			ret = desc->setup(dws);
+			if (ret)
+				return ret;
+		}
+	} else {
+		return -ENODEV;
+	}
+
+	ret = dw_spi_add_host(&pdev->dev, dws);
+	if (ret)
+		return ret;
+
+	/* PCI hook and SPI hook use the same drv data */
+	pci_set_drvdata(pdev, dwpci);
+
+	dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
+		pdev->vendor, pdev->device);
+
+	return 0;
+}
+
+static void spi_pci_remove(struct pci_dev *pdev)
+{
+	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
+
+	dw_spi_remove_host(&dwpci->dws);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int spi_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
+
+	return dw_spi_suspend_host(&dwpci->dws);
+}
+
+static int spi_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
+
+	return dw_spi_resume_host(&dwpci->dws);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume);
+
+static const struct pci_device_id pci_ids[] = {
+	/* Intel MID platform SPI controller 0 */
+	/*
+	 * The access to the device 8086:0801 is disabled by HW, since it's
+	 * exclusively used by SCU to communicate with MSIC.
+	 */
+	/* Intel MID platform SPI controller 1 */
+	{ PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1},
+	/* Intel MID platform SPI controller 2 */
+	{ PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2},
+	{},
+};
+
+static struct pci_driver dw_spi_driver = {
+	.name =		DRIVER_NAME,
+	.id_table =	pci_ids,
+	.probe =	spi_pci_probe,
+	.remove =	spi_pci_remove,
+	.driver         = {
+		.pm     = &dw_spi_pm_ops,
+	},
+};
+
+module_pci_driver(dw_spi_driver);
+
+MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
+MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
+MODULE_LICENSE("GPL v2");