--- /dev/null
+/*
+ * 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;
+}
--- /dev/null
+
+/*
+ * Copyright (C) 2016 Peng Fan <van.freenix@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <dm/device.h>
+#include <dm/pinctrl.h>
+
+#include "pinctrl-imx.h"
+
+static struct imx_pinctrl_soc_info imx6_pinctrl_soc_info;
+
+static int imx6_pinctrl_probe(struct udevice *dev)
+{
+ struct imx_pinctrl_soc_info *info =
+ (struct imx_pinctrl_soc_info *)dev_get_driver_data(dev);
+
+ return imx_pinctrl_probe(dev, info);
+}
+
+static const struct udevice_id imx6_pinctrl_match[] = {
+ { .compatible = "fsl,imx6q-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
+ { .compatible = "fsl,imx6dl-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
+ { .compatible = "fsl,imx6sl-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
+ { .compatible = "fsl,imx6sx-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
+ { .compatible = "fsl,imx6ul-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(imx6_pinctrl) = {
+ .name = "imx6-pinctrl",
+ .id = UCLASS_PINCTRL,
+ .of_match = of_match_ptr(imx6_pinctrl_match),
+ .probe = imx6_pinctrl_probe,
+ .remove = imx_pinctrl_remove,
+ .priv_auto_alloc_size = sizeof(struct imx_pinctrl_priv),
+ .ops = &imx_pinctrl_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};
projects / platform / kernel / u-boot.git / commitdiff