Hi
On Sun, Jan 22, 2023 at 12:45 AM Linus Walleij linus.walleij@linaro.org wrote:
Add support for the iproc Broadcom NAND controller, used in Northstar SoCs for example. Based on the Linux driver.
Cc: Philippe Reynes philippe.reynes@softathome.com Signed-off-by: Linus Walleij linus.walleij@linaro.org
drivers/mtd/nand/raw/Kconfig | 7 + drivers/mtd/nand/raw/brcmnand/Makefile | 1 + drivers/mtd/nand/raw/brcmnand/iproc_nand.c | 141 +++++++++++++++++++++ 3 files changed, 149 insertions(+) create mode 100644 drivers/mtd/nand/raw/brcmnand/iproc_nand.c
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index 5b35da45f584..6a13bc1e228a 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -156,6 +156,13 @@ config NAND_BRCMNAND_63158 help Enable support for broadcom nand driver on bcm63158.
+config NAND_BRCMNAND_IPROC
bool "Support Broadcom NAND controller on the iproc family"depends on NAND_BRCMNANDhelpEnable support for broadcom nand driver on the Broadcomiproc family such as Northstar (BCM5301x, BCM4708...)config NAND_DAVINCI bool "Support TI Davinci NAND controller" select SYS_NAND_SELF_INIT if TARGET_DA850EVM diff --git a/drivers/mtd/nand/raw/brcmnand/Makefile b/drivers/mtd/nand/raw/brcmnand/Makefile index f46a7edae321..0c6325aaa618 100644 --- a/drivers/mtd/nand/raw/brcmnand/Makefile +++ b/drivers/mtd/nand/raw/brcmnand/Makefile @@ -6,5 +6,6 @@ obj-$(CONFIG_NAND_BRCMNAND_6753) += bcm6753_nand.o obj-$(CONFIG_NAND_BRCMNAND_68360) += bcm68360_nand.o obj-$(CONFIG_NAND_BRCMNAND_6838) += bcm6838_nand.o obj-$(CONFIG_NAND_BRCMNAND_6858) += bcm6858_nand.o +obj-$(CONFIG_NAND_BRCMNAND_IPROC) += iproc_nand.o obj-$(CONFIG_NAND_BRCMNAND) += brcmnand.o obj-$(CONFIG_NAND_BRCMNAND) += brcmnand_compat.o diff --git a/drivers/mtd/nand/raw/brcmnand/iproc_nand.c b/drivers/mtd/nand/raw/brcmnand/iproc_nand.c new file mode 100644 index 000000000000..c61a120b6d27 --- /dev/null +++ b/drivers/mtd/nand/raw/brcmnand/iproc_nand.c @@ -0,0 +1,141 @@ +// SPDX-License-Identifier: GPL-2.0 +/*
- Code borrowed from the Linux driver
- Copyright (C) 2015 Broadcom Corporation
- */
+#include <common.h> +#include <asm/io.h> +#include <memalign.h> +#include <nand.h> +#include <linux/bitops.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/io.h> +#include <linux/ioport.h> +#include <dm.h>
+#include "brcmnand.h"
+struct iproc_nand_soc {
struct brcmnand_soc soc;void __iomem *idm_base;void __iomem *ext_base;+};
+#define IPROC_NAND_CTLR_READY_OFFSET 0x10 +#define IPROC_NAND_CTLR_READY BIT(0)
+#define IPROC_NAND_IO_CTRL_OFFSET 0x00 +#define IPROC_NAND_APB_LE_MODE BIT(24) +#define IPROC_NAND_INT_CTRL_READ_ENABLE BIT(6)
+static bool iproc_nand_intc_ack(struct brcmnand_soc *soc) +{
struct iproc_nand_soc *priv =container_of(soc, struct iproc_nand_soc, soc);void __iomem *mmio = priv->ext_base + IPROC_NAND_CTLR_READY_OFFSET;u32 val = brcmnand_readl(mmio);if (val & IPROC_NAND_CTLR_READY) {brcmnand_writel(IPROC_NAND_CTLR_READY, mmio);return true;}return false;+}
+static void iproc_nand_intc_set(struct brcmnand_soc *soc, bool en) +{
struct iproc_nand_soc *priv =container_of(soc, struct iproc_nand_soc, soc);void __iomem *mmio = priv->idm_base + IPROC_NAND_IO_CTRL_OFFSET;u32 val = brcmnand_readl(mmio);if (en)val |= IPROC_NAND_INT_CTRL_READ_ENABLE;elseval &= ~IPROC_NAND_INT_CTRL_READ_ENABLE;brcmnand_writel(val, mmio);+}
+static void iproc_nand_apb_access(struct brcmnand_soc *soc, bool prepare,
bool is_param)+{
struct iproc_nand_soc *priv =container_of(soc, struct iproc_nand_soc, soc);void __iomem *mmio = priv->idm_base + IPROC_NAND_IO_CTRL_OFFSET;u32 val;val = brcmnand_readl(mmio);/** In the case of BE or when dealing with NAND data, always configure* the APB bus to LE mode before accessing the FIFO and back to BE mode* after the access is done*/if (IS_ENABLED(CONFIG_SYS_BIG_ENDIAN) || !is_param) {if (prepare)val |= IPROC_NAND_APB_LE_MODE;elseval &= ~IPROC_NAND_APB_LE_MODE;} else { /* when in LE accessing the parameter page, keep APB in BE */val &= ~IPROC_NAND_APB_LE_MODE;}brcmnand_writel(val, mmio);+}
+static int iproc_nand_probe(struct udevice *dev) +{
struct udevice *pdev = dev;struct iproc_nand_soc *priv = dev_get_priv(dev);struct brcmnand_soc *soc;struct resource res;soc = &priv->soc;dev_read_resource_byname(pdev, "iproc-idm", &res);
Check the return value of dev_read_resource
priv->idm_base = ioremap(res.start, resource_size(&res));
To be more close to linux use devm_ioremap.
if (IS_ERR(priv->idm_base))return PTR_ERR(priv->idm_base);dev_read_resource_byname(pdev, "iproc-ext", &res);
Check the return value of dev_read_resource
priv->ext_base = ioremap(res.start, resource_size(&res));
To be more close to linux use devm_ioremap.
if (IS_ERR(priv->ext_base))return PTR_ERR(priv->ext_base);soc->ctlrdy_ack = iproc_nand_intc_ack;soc->ctlrdy_set_enabled = iproc_nand_intc_set;soc->prepare_data_bus = iproc_nand_apb_access;return brcmnand_probe(pdev, soc);+}
+static const struct udevice_id iproc_nand_dt_ids[] = {
{.compatible = "brcm,nand-iproc",},{ /* sentinel */ }+};
+U_BOOT_DRIVER(iproc_nand) = {
.name = "iproc-nand",.id = UCLASS_MTD,.of_match = iproc_nand_dt_ids,.probe = iproc_nand_probe,.priv_auto = sizeof(struct iproc_nand_soc),+};
+void board_nand_init(void) +{
struct udevice *dev;int ret;ret = uclass_get_device_by_driver(UCLASS_MTD,DM_DRIVER_GET(iproc_nand), &dev);if (ret && ret != -ENODEV)pr_err("Failed to initialize %s. (error %d)\n", dev->name,ret);+}
2.39.0
Another then that:
Reviewed-by: Michael Trimarchi michael@amarulasolutions.com