Merge branch 'master' of git://www.denx.de/git/u-boot-imx

1 files changed, 241 insertions, 0 deletions

diff --git a/drivers/pinctrl/nxp/pinctrl-imx.c b/drivers/pinctrl/nxp/pinctrl-imx.c
new file mode 100644
index 0000000000..40b0616c0b
--- /dev/null
+++ b/drivers/pinctrl/nxp/pinctrl-imx.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2016 Peng Fan <van.freenix@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mapmem.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <dm/device.h>
+#include <dm/pinctrl.h>
+
+#include "pinctrl-imx.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int imx_pinctrl_set_state(struct udevice *dev, struct udevice *config)
+{
+	struct imx_pinctrl_priv *priv = dev_get_priv(dev);
+	struct imx_pinctrl_soc_info *info = priv->info;
+	int node = config->of_offset;
+	const struct fdt_property *prop;
+	u32 *pin_data;
+	int npins, size, pin_size;
+	int mux_reg, conf_reg, input_reg, input_val, mux_mode, config_val;
+	int i, j = 0;
+
+	dev_dbg(dev, "%s: %s\n", __func__, config->name);
+
+	if (info->flags & SHARE_MUX_CONF_REG)
+		pin_size = SHARE_FSL_PIN_SIZE;
+	else
+		pin_size = FSL_PIN_SIZE;
+
+	prop = fdt_getprop(gd->fdt_blob, node, "fsl,pins", &size);
+	if (!prop) {
+		dev_err(dev, "No fsl,pins property in node %s\n", config->name);
+		return -EINVAL;
+	}
+
+	if (!size || size % pin_size) {
+		dev_err(dev, "Invalid fsl,pins property in node %s\n",
+			config->name);
+		return -EINVAL;
+	}
+
+	pin_data = devm_kzalloc(dev, size, 0);
+	if (!pin_data)
+		return -ENOMEM;
+
+	if (fdtdec_get_int_array(gd->fdt_blob, node, "fsl,pins",
+				 pin_data, size >> 2)) {
+		dev_err(dev, "Error reading pin data.\n");
+		return -EINVAL;
+	}
+
+	npins = size / pin_size;
+
+	/*
+	 * Refer to linux documentation for details:
+	 * Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt
+	 */
+	for (i = 0; i < npins; i++) {
+		mux_reg = pin_data[j++];
+
+		if (!(info->flags & ZERO_OFFSET_VALID) && !mux_reg)
+			mux_reg = -1;
+
+		if (info->flags & SHARE_MUX_CONF_REG) {
+			conf_reg = mux_reg;
+		} else {
+			conf_reg = pin_data[j++];
+			if (!(info->flags & ZERO_OFFSET_VALID) && !conf_reg)
+				conf_reg = -1;
+		}
+
+		if ((mux_reg == -1) || (conf_reg == -1)) {
+			dev_err(dev, "Error mux_reg or conf_reg\n");
+			return -EINVAL;
+		}
+
+		input_reg = pin_data[j++];
+		mux_mode = pin_data[j++];
+		input_val = pin_data[j++];
+		config_val = pin_data[j++];
+
+		dev_dbg(dev, "mux_reg 0x%x, conf_reg 0x%x, input_reg 0x%x, "
+			"mux_mode 0x%x, input_val 0x%x, config_val 0x%x\n",
+			mux_reg, conf_reg, input_reg, mux_mode, input_val,
+			config_val);
+
+		if (config_val & IMX_PAD_SION)
+			mux_mode |= IOMUXC_CONFIG_SION;
+
+		config_val &= ~IMX_PAD_SION;
+
+		/* Set Mux */
+		if (info->flags & SHARE_MUX_CONF_REG) {
+			clrsetbits_le32(info->base + mux_reg, 0x7 << 20,
+					mux_mode << 20);
+		} else {
+			writel(mux_mode, info->base + mux_reg);
+		}
+
+		dev_dbg(dev, "write mux: offset 0x%x val 0x%x\n", mux_reg,
+			mux_mode);
+
+		/*
+		 * Set select input
+		 *
+		 * If the select input value begins with 0xff, it's a quirky
+		 * select input and the value should be interpreted as below.
+		 *     31     23      15      7        0
+		 *     | 0xff | shift | width | select |
+		 * It's used to work around the problem that the select
+		 * input for some pin is not implemented in the select
+		 * input register but in some general purpose register.
+		 * We encode the select input value, width and shift of
+		 * the bit field into input_val cell of pin function ID
+		 * in device tree, and then decode them here for setting
+		 * up the select input bits in general purpose register.
+		 */
+
+		if (input_val >> 24 == 0xff) {
+			u32 val = input_val;
+			u8 select = val & 0xff;
+			u8 width = (val >> 8) & 0xff;
+			u8 shift = (val >> 16) & 0xff;
+			u32 mask = ((1 << width) - 1) << shift;
+			/*
+			 * The input_reg[i] here is actually some IOMUXC general
+			 * purpose register, not regular select input register.
+			 */
+			val = readl(info->base + input_reg);
+			val &= ~mask;
+			val |= select << shift;
+			writel(val, info->base + input_reg);
+		} else if (input_reg) {
+			/*
+			 * Regular select input register can never be at offset
+			 * 0, and we only print register value for regular case.
+			 */
+			if (info->input_sel_base)
+				writel(input_val, info->input_sel_base +
+				       input_reg);
+			else
+				writel(input_val, info->base + input_reg);
+
+			dev_dbg(dev, "select_input: offset 0x%x val 0x%x\n",
+				input_reg, input_val);
+		}
+
+		/* Set config */
+		if (!(config_val & IMX_NO_PAD_CTL)) {
+			if (info->flags & SHARE_MUX_CONF_REG) {
+				clrsetbits_le32(info->base + conf_reg, 0xffff,
+						config_val);
+			} else {
+				writel(config_val, info->base + conf_reg);
+			}
+
+			dev_dbg(dev, "write config: offset 0x%x val 0x%x\n",
+				conf_reg, config_val);
+		}
+	}
+
+	return 0;
+}
+
+const struct pinctrl_ops imx_pinctrl_ops  = {
+	.set_state = imx_pinctrl_set_state,
+};
+
+int imx_pinctrl_probe(struct udevice *dev,
+		      struct imx_pinctrl_soc_info *info)
+{
+	struct imx_pinctrl_priv *priv = dev_get_priv(dev);
+	int node = dev->of_offset, ret;
+	struct fdtdec_phandle_args arg;
+	fdt_addr_t addr;
+	fdt_size_t size;
+
+	if (!info) {
+		dev_err(dev, "wrong pinctrl info\n");
+		return -EINVAL;
+	}
+
+	priv->dev = dev;
+	priv->info = info;
+
+	addr = fdtdec_get_addr_size(gd->fdt_blob, dev->of_offset, "reg", &size);
+
+	if (addr == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	info->base = map_sysmem(addr, size);
+	if (!info->base)
+		return -ENOMEM;
+	priv->info = info;
+
+	/*
+	 * Refer to linux documentation for details:
+	 * Documentation/devicetree/bindings/pinctrl/fsl,imx7d-pinctrl.txt
+	 */
+	if (fdtdec_get_bool(gd->fdt_blob, node, "fsl,input-sel")) {
+		ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
+						     node, "fsl,input-sel",
+						     NULL, 0, 0, &arg);
+		if (ret) {
+			dev_err(dev, "iomuxc fsl,input-sel property not found\n");
+			return -EINVAL;
+		}
+
+		addr = fdtdec_get_addr_size(gd->fdt_blob, arg.node, "reg",
+					    &size);
+		if (addr == FDT_ADDR_T_NONE)
+			return -EINVAL;
+
+		info->input_sel_base = map_sysmem(addr, size);
+		if (!info->input_sel_base)
+			return -ENOMEM;
+	}
+
+	dev_info(dev, "initialized IMX pinctrl driver\n");
+
+	return 0;
+}
+
+int imx_pinctrl_remove(struct udevice *dev)
+{
+	struct imx_pinctrl_priv *priv = dev_get_priv(dev);
+	struct imx_pinctrl_soc_info *info = priv->info;
+
+	if (info->input_sel_base)
+		unmap_sysmem(info->input_sel_base);
+	if (info->base)
+		unmap_sysmem(info->base);
+
+	return 0;
+}