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Date: Mon, 26 Jun 2017 09:13:39 -0700
From: matthew.gerlach@...ux.intel.com
To: vndao@...era.com, dwmw2@...radead.org, computersforpeace@...il.com,
boris.brezillon@...e-electrons.com, marek.vasut@...il.com,
richard@....at, cyrille.pitchen@...ev4u.fr, robh+dt@...nel.org,
mark.rutland@....com, linux-mtd@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
gregkh@...uxfoundation.org, davem@...emloft.net, mchehab@...nel.org
Cc: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
Subject: [PATCH 3/3] mtd: spi-nor: Altera Quadspi Flash Controller v2 Platform driver
From: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
---
MAINTAINERS | 1 +
drivers/mtd/spi-nor/Kconfig | 5 +
drivers/mtd/spi-nor/Makefile | 1 +
drivers/mtd/spi-nor/altera-quadspi-platform.c | 137 ++++++++++++++++++++++++++
4 files changed, 144 insertions(+)
create mode 100644 drivers/mtd/spi-nor/altera-quadspi-platform.c
diff --git a/MAINTAINERS b/MAINTAINERS
index ae33fa6..c32bb98 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -653,6 +653,7 @@ M: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
L: linux-mtd@...ts.infradead.org
S: Maintained
F: drivers/mtd/spi-nor/altera-quadspi.c
+F: drivers/mtd/spi-nor/altera-quadspi-platform.c
F: inclulde/linux/mtd/altera-quadspi.h
ALTERA SYSTEM RESOURCE DRIVER FOR ARRIA10 DEVKIT
diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
index 89fe425..f3d5c01 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -118,4 +118,9 @@ config SPI_ALTERA_QUADSPI
help
Enable support for version 2 of Altera Quad SPI Flash Controller.
+config SPI_ALTERA_QUADSPI_PLATFORM
+ tristate "Platform support for Altera Quad SPI Flash Controller II"
+ help
+ Platform driver support for Altera Quad SPI Flash Controller II"
+
endif # MTD_SPI_NOR
diff --git a/drivers/mtd/spi-nor/Makefile b/drivers/mtd/spi-nor/Makefile
index 024c6ac..042f87e 100644
--- a/drivers/mtd/spi-nor/Makefile
+++ b/drivers/mtd/spi-nor/Makefile
@@ -10,4 +10,5 @@ obj-$(CONFIG_SPI_INTEL_SPI) += intel-spi.o
obj-$(CONFIG_SPI_INTEL_SPI_PLATFORM) += intel-spi-platform.o
obj-$(CONFIG_SPI_STM32_QUADSPI) += stm32-quadspi.o
obj-$(CONFIG_SPI_ALTERA_QUADSPI) += altera-quadspi.o
+obj-$(CONFIG_SPI_ALTERA_QUADSPI_PLATFORM) += altera-quadspi-platform.o
diff --git a/drivers/mtd/spi-nor/altera-quadspi-platform.c b/drivers/mtd/spi-nor/altera-quadspi-platform.c
new file mode 100644
index 0000000..c8d2a47
--- /dev/null
+++ b/drivers/mtd/spi-nor/altera-quadspi-platform.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2014 Altera Corporation. All rights reserved.
+ * Copyright (C) 2017 Intel Corporation. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/mtd/altera-quadspi.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+
+static int altera_quadspi_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ void __iomem *csr_base;
+ void __iomem *data_base;
+ void __iomem *window_base = NULL;
+ u32 window_size = 0;
+ u32 flags = 0;
+ u32 bank;
+ int ret;
+ struct device_node *pp;
+
+ if (!np) {
+ dev_err(dev, "no device found\n");
+ return -ENODEV;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "avl_csr");
+ csr_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(csr_base)) {
+ dev_err(dev, "%s: ERROR: failed to map csr base\n", __func__);
+ return PTR_ERR(csr_base);
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "avl_mem");
+ data_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(data_base)) {
+ dev_err(dev, "%s: ERROR: failed to map data base\n", __func__);
+ return PTR_ERR(data_base);
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "avl_window");
+ if (res) {
+ window_base = NULL;
+ window_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(window_base)) {
+ dev_err(dev, "%s: ERROR: failed to map window base\n",
+ __func__);
+ return PTR_ERR(data_base);
+ }
+
+ of_property_read_u32(dev->of_node, "window-size", &window_size);
+
+ if (!window_size) {
+ dev_err(dev,
+ "alv_window defined, %s",
+ "but no window-size defined\n");
+ return -EINVAL;
+ }
+ }
+
+ if (of_property_read_bool(np, "read-bit-reverse"))
+ flags |= ALTERA_QUADSPI_FL_BITREV_READ;
+
+ if (of_property_read_bool(np, "write-bit-reverse"))
+ flags |= ALTERA_QUADSPI_FL_BITREV_WRITE;
+
+ ret = altera_quadspi_create(dev, csr_base, data_base,
+ window_base, (size_t)window_size, flags);
+
+ if (ret) {
+ dev_err(dev, "failed to create qspi device\n");
+ return ret;
+ }
+
+ for_each_available_child_of_node(np, pp) {
+ of_property_read_u32(pp, "reg", &bank);
+ if (bank >= ALTERA_QUADSPI_MAX_NUM_FLASH_CHIP) {
+ dev_err(dev, "bad reg value %u >= %u\n", bank,
+ ALTERA_QUADSPI_MAX_NUM_FLASH_CHIP);
+ goto error;
+ }
+
+ if (altera_qspi_add_bank(dev, bank, pp)) {
+ dev_err(dev, "failed to add bank %u\n", bank);
+ goto error;
+ }
+ }
+
+ return 0;
+error:
+ altera_quadspi_remove_banks(dev);
+ return -EIO;
+}
+
+static int altera_quadspi_remove(struct platform_device *pdev)
+{
+ return altera_quadspi_remove_banks(&pdev->dev);
+}
+
+static const struct of_device_id altera_quadspi_id_table[] = {
+
+ { .compatible = "altr,quadspi-v2",},
+ {}
+};
+MODULE_DEVICE_TABLE(of, altera_quadspi_id_table);
+
+static struct platform_driver altera_quadspi_driver = {
+ .driver = {
+ .name = "altera_quadspi_platform",
+ .of_match_table = altera_quadspi_id_table,
+ },
+ .probe = altera_quadspi_probe,
+ .remove = altera_quadspi_remove,
+};
+module_platform_driver(altera_quadspi_driver);
+
+MODULE_AUTHOR("Viet Nga Dao <vndao@...era.com>");
+MODULE_AUTHOR("Yong Sern Lau <lau.yong.sern@...el.com>");
+MODULE_AUTHOR("Matthew Gerlach <matthew.gerlach@...ux.intel.com>");
+MODULE_DESCRIPTION("Altera QuadSPI Version 2 Platform Driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
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