Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 215 insertions, 0 deletions

diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c
new file mode 100644
index 0000000000..7c8279d13f
--- /dev/null
+++ b/drivers/spi/spi-dw-pci.c
@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PCI interface driver for DW SPI Core
+ *
+ * Copyright (c) 2009, 2014 Intel Corporation.
+ */
+
+#include <linux/pci.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+
+#include "spi-dw.h"
+
+#define DRIVER_NAME "dw_spi_pci"
+
+/* HW info for MRST Clk Control Unit, 32b reg per controller */
+#define MRST_SPI_CLK_BASE	100000000	/* 100m */
+#define MRST_CLK_SPI_REG	0xff11d86c
+#define CLK_SPI_BDIV_OFFSET	0
+#define CLK_SPI_BDIV_MASK	0x00000007
+#define CLK_SPI_CDIV_OFFSET	9
+#define CLK_SPI_CDIV_MASK	0x00000e00
+#define CLK_SPI_DISABLE_OFFSET	8
+
+struct dw_spi_pci_desc {
+	int	(*setup)(struct dw_spi *);
+	u16	num_cs;
+	u16	bus_num;
+	u32	max_freq;
+};
+
+static int dw_spi_pci_mid_init(struct dw_spi *dws)
+{
+	void __iomem *clk_reg;
+	u32 clk_cdiv;
+
+	clk_reg = ioremap(MRST_CLK_SPI_REG, 16);
+	if (!clk_reg)
+		return -ENOMEM;
+
+	/* Get SPI controller operating freq info */
+	clk_cdiv = readl(clk_reg + dws->bus_num * sizeof(u32));
+	clk_cdiv &= CLK_SPI_CDIV_MASK;
+	clk_cdiv >>= CLK_SPI_CDIV_OFFSET;
+	dws->max_freq = MRST_SPI_CLK_BASE / (clk_cdiv + 1);
+
+	iounmap(clk_reg);
+
+	dw_spi_dma_setup_mfld(dws);
+
+	return 0;
+}
+
+static int dw_spi_pci_generic_init(struct dw_spi *dws)
+{
+	dw_spi_dma_setup_generic(dws);
+
+	return 0;
+}
+
+static struct dw_spi_pci_desc dw_spi_pci_mid_desc_1 = {
+	.setup = dw_spi_pci_mid_init,
+	.num_cs = 5,
+	.bus_num = 0,
+};
+
+static struct dw_spi_pci_desc dw_spi_pci_mid_desc_2 = {
+	.setup = dw_spi_pci_mid_init,
+	.num_cs = 2,
+	.bus_num = 1,
+};
+
+static struct dw_spi_pci_desc dw_spi_pci_ehl_desc = {
+	.setup = dw_spi_pci_generic_init,
+	.num_cs = 2,
+	.bus_num = -1,
+	.max_freq = 100000000,
+};
+
+static int dw_spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct dw_spi_pci_desc *desc = (struct dw_spi_pci_desc *)ent->driver_data;
+	struct dw_spi *dws;
+	int pci_bar = 0;
+	int ret;
+
+	ret = pcim_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	dws = devm_kzalloc(&pdev->dev, sizeof(*dws), GFP_KERNEL);
+	if (!dws)
+		return -ENOMEM;
+
+	/* Get basic io resource and map it */
+	dws->paddr = pci_resource_start(pdev, pci_bar);
+	pci_set_master(pdev);
+
+	ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
+	if (ret)
+		return ret;
+
+	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
+	if (ret < 0)
+		return ret;
+
+	dws->regs = pcim_iomap_table(pdev)[pci_bar];
+	dws->irq = pci_irq_vector(pdev, 0);
+
+	/*
+	 * Specific handling for platforms, like dma setup,
+	 * clock rate, FIFO depth.
+	 */
+	if (desc) {
+		dws->num_cs = desc->num_cs;
+		dws->bus_num = desc->bus_num;
+		dws->max_freq = desc->max_freq;
+
+		if (desc->setup) {
+			ret = desc->setup(dws);
+			if (ret)
+				goto err_free_irq_vectors;
+		}
+	} else {
+		ret = -ENODEV;
+		goto err_free_irq_vectors;
+	}
+
+	ret = dw_spi_add_host(&pdev->dev, dws);
+	if (ret)
+		goto err_free_irq_vectors;
+
+	/* PCI hook and SPI hook use the same drv data */
+	pci_set_drvdata(pdev, dws);
+
+	dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
+		pdev->vendor, pdev->device);
+
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_put_autosuspend(&pdev->dev);
+	pm_runtime_allow(&pdev->dev);
+
+	return 0;
+
+err_free_irq_vectors:
+	pci_free_irq_vectors(pdev);
+	return ret;
+}
+
+static void dw_spi_pci_remove(struct pci_dev *pdev)
+{
+	struct dw_spi *dws = pci_get_drvdata(pdev);
+
+	pm_runtime_forbid(&pdev->dev);
+	pm_runtime_get_noresume(&pdev->dev);
+
+	dw_spi_remove_host(dws);
+	pci_free_irq_vectors(pdev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int dw_spi_pci_suspend(struct device *dev)
+{
+	struct dw_spi *dws = dev_get_drvdata(dev);
+
+	return dw_spi_suspend_host(dws);
+}
+
+static int dw_spi_pci_resume(struct device *dev)
+{
+	struct dw_spi *dws = dev_get_drvdata(dev);
+
+	return dw_spi_resume_host(dws);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(dw_spi_pci_pm_ops, dw_spi_pci_suspend, dw_spi_pci_resume);
+
+static const struct pci_device_id dw_spi_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)&dw_spi_pci_mid_desc_1},
+	/* Intel MID platform SPI controller 2 */
+	{ PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&dw_spi_pci_mid_desc_2},
+	/* Intel Elkhart Lake PSE SPI controllers */
+	{ PCI_VDEVICE(INTEL, 0x4b84), (kernel_ulong_t)&dw_spi_pci_ehl_desc},
+	{ PCI_VDEVICE(INTEL, 0x4b85), (kernel_ulong_t)&dw_spi_pci_ehl_desc},
+	{ PCI_VDEVICE(INTEL, 0x4b86), (kernel_ulong_t)&dw_spi_pci_ehl_desc},
+	{ PCI_VDEVICE(INTEL, 0x4b87), (kernel_ulong_t)&dw_spi_pci_ehl_desc},
+	{},
+};
+MODULE_DEVICE_TABLE(pci, dw_spi_pci_ids);
+
+static struct pci_driver dw_spi_pci_driver = {
+	.name =		DRIVER_NAME,
+	.id_table =	dw_spi_pci_ids,
+	.probe =	dw_spi_pci_probe,
+	.remove =	dw_spi_pci_remove,
+	.driver         = {
+		.pm     = &dw_spi_pci_pm_ops,
+	},
+};
+module_pci_driver(dw_spi_pci_driver);
+
+MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
+MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(SPI_DW_CORE);