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11a1c27eb4
The pinctrl supports to set any bit in input register on iMX6 if
the MSB of input value is 0xff. But the driver uses signed int for
input value, so when executing the codes below, it won't meet.
Because this is arithmetic right shift.
if (input_val >> 24 == 0xff)
Fix the issue by changing the input_val, config_val and mux_mode to u32.
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Fugang Duan <fugang.duan@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
272 lines
6.6 KiB
C
272 lines
6.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Peng Fan <van.freenix@gmail.com>
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*/
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#include <common.h>
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#include <mapmem.h>
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#include <linux/io.h>
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#include <linux/err.h>
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#include <dm.h>
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#include <dm/pinctrl.h>
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#include "pinctrl-imx.h"
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DECLARE_GLOBAL_DATA_PTR;
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static int imx_pinctrl_set_state(struct udevice *dev, struct udevice *config)
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{
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struct imx_pinctrl_priv *priv = dev_get_priv(dev);
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struct imx_pinctrl_soc_info *info = priv->info;
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int node = dev_of_offset(config);
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const struct fdt_property *prop;
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u32 *pin_data;
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int npins, size, pin_size;
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int mux_reg, conf_reg, input_reg;
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u32 input_val, mux_mode, config_val;
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u32 mux_shift = info->mux_mask ? ffs(info->mux_mask) - 1 : 0;
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int i, j = 0;
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dev_dbg(dev, "%s: %s\n", __func__, config->name);
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if (info->flags & IMX8_USE_SCU)
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pin_size = SHARE_IMX8_PIN_SIZE;
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else if (info->flags & SHARE_MUX_CONF_REG)
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pin_size = SHARE_FSL_PIN_SIZE;
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else
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pin_size = FSL_PIN_SIZE;
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prop = fdt_getprop(gd->fdt_blob, node, "fsl,pins", &size);
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if (!prop) {
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dev_err(dev, "No fsl,pins property in node %s\n", config->name);
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return -EINVAL;
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}
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if (!size || size % pin_size) {
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dev_err(dev, "Invalid fsl,pins property in node %s\n",
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config->name);
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return -EINVAL;
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}
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pin_data = devm_kzalloc(dev, size, 0);
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if (!pin_data)
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return -ENOMEM;
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if (fdtdec_get_int_array(gd->fdt_blob, node, "fsl,pins",
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pin_data, size >> 2)) {
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dev_err(dev, "Error reading pin data.\n");
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devm_kfree(dev, pin_data);
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return -EINVAL;
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}
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npins = size / pin_size;
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if (info->flags & IMX8_USE_SCU) {
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imx_pinctrl_scu_conf_pins(info, pin_data, npins);
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} else {
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/*
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* Refer to linux documentation for details:
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* Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt
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*/
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for (i = 0; i < npins; i++) {
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mux_reg = pin_data[j++];
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if (!(info->flags & ZERO_OFFSET_VALID) && !mux_reg)
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mux_reg = -1;
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if (info->flags & SHARE_MUX_CONF_REG) {
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conf_reg = mux_reg;
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} else {
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conf_reg = pin_data[j++];
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if (!(info->flags & ZERO_OFFSET_VALID) &&
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!conf_reg)
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conf_reg = -1;
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}
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if ((mux_reg == -1) || (conf_reg == -1)) {
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dev_err(dev, "Error mux_reg or conf_reg\n");
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devm_kfree(dev, pin_data);
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return -EINVAL;
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}
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input_reg = pin_data[j++];
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mux_mode = pin_data[j++];
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input_val = pin_data[j++];
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config_val = pin_data[j++];
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dev_dbg(dev, "mux_reg 0x%x, conf_reg 0x%x, "
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"input_reg 0x%x, mux_mode 0x%x, "
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"input_val 0x%x, config_val 0x%x\n",
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mux_reg, conf_reg, input_reg, mux_mode,
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input_val, config_val);
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if (config_val & IMX_PAD_SION)
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mux_mode |= IOMUXC_CONFIG_SION;
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config_val &= ~IMX_PAD_SION;
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/* Set Mux */
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if (info->flags & SHARE_MUX_CONF_REG) {
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clrsetbits_le32(info->base + mux_reg,
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info->mux_mask,
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mux_mode << mux_shift);
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} else {
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writel(mux_mode, info->base + mux_reg);
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}
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dev_dbg(dev, "write mux: offset 0x%x val 0x%x\n",
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mux_reg, mux_mode);
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/*
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* Set select input
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*
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* If the select input value begins with 0xff,
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* it's a quirky select input and the value should
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* be interpreted as below.
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* 31 23 15 7 0
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* | 0xff | shift | width | select |
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* It's used to work around the problem that the
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* select input for some pin is not implemented in
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* the select input register but in some general
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* purpose register. We encode the select input
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* value, width and shift of the bit field into
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* input_val cell of pin function ID in device tree,
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* and then decode them here for setting up the select
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* input bits in general purpose register.
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*/
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if (input_val >> 24 == 0xff) {
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u32 val = input_val;
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u8 select = val & 0xff;
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u8 width = (val >> 8) & 0xff;
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u8 shift = (val >> 16) & 0xff;
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u32 mask = ((1 << width) - 1) << shift;
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/*
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* The input_reg[i] here is actually some
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* IOMUXC general purpose register, not
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* regular select input register.
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*/
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val = readl(info->base + input_reg);
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val &= ~mask;
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val |= select << shift;
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writel(val, info->base + input_reg);
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} else if (input_reg) {
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/*
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* Regular select input register can never be
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* at offset 0, and we only print register
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* value for regular case.
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*/
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if (info->input_sel_base)
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writel(input_val,
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info->input_sel_base +
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input_reg);
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else
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writel(input_val,
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info->base + input_reg);
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dev_dbg(dev, "select_input: offset 0x%x val "
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"0x%x\n", input_reg, input_val);
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}
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/* Set config */
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if (!(config_val & IMX_NO_PAD_CTL)) {
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if (info->flags & SHARE_MUX_CONF_REG) {
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clrsetbits_le32(info->base + conf_reg,
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~info->mux_mask,
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config_val);
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} else {
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writel(config_val,
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info->base + conf_reg);
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}
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dev_dbg(dev, "write config: offset 0x%x val "
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"0x%x\n", conf_reg, config_val);
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}
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}
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}
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devm_kfree(dev, pin_data);
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return 0;
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}
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const struct pinctrl_ops imx_pinctrl_ops = {
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.set_state = imx_pinctrl_set_state,
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};
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int imx_pinctrl_probe(struct udevice *dev,
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struct imx_pinctrl_soc_info *info)
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{
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struct imx_pinctrl_priv *priv = dev_get_priv(dev);
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int node = dev_of_offset(dev), ret;
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struct fdtdec_phandle_args arg;
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fdt_addr_t addr;
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fdt_size_t size;
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if (!info) {
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dev_err(dev, "wrong pinctrl info\n");
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return -EINVAL;
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}
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priv->dev = dev;
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priv->info = info;
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if (info->flags & IMX8_USE_SCU)
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return 0;
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addr = fdtdec_get_addr_size(gd->fdt_blob, dev_of_offset(dev), "reg",
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&size);
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if (addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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info->base = map_sysmem(addr, size);
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if (!info->base)
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return -ENOMEM;
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priv->info = info;
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info->mux_mask = fdtdec_get_int(gd->fdt_blob, node, "fsl,mux_mask", 0);
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/*
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* Refer to linux documentation for details:
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* Documentation/devicetree/bindings/pinctrl/fsl,imx7d-pinctrl.txt
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*/
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if (fdtdec_get_bool(gd->fdt_blob, node, "fsl,input-sel")) {
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ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
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node, "fsl,input-sel",
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NULL, 0, 0, &arg);
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if (ret) {
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dev_err(dev, "iomuxc fsl,input-sel property not found\n");
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return -EINVAL;
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}
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addr = fdtdec_get_addr_size(gd->fdt_blob, arg.node, "reg",
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&size);
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if (addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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info->input_sel_base = map_sysmem(addr, size);
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if (!info->input_sel_base)
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return -ENOMEM;
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}
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dev_dbg(dev, "initialized IMX pinctrl driver\n");
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return 0;
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}
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int imx_pinctrl_remove(struct udevice *dev)
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{
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struct imx_pinctrl_priv *priv = dev_get_priv(dev);
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struct imx_pinctrl_soc_info *info = priv->info;
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if (info->flags & IMX8_USE_SCU)
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return 0;
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if (info->input_sel_base)
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unmap_sysmem(info->input_sel_base);
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if (info->base)
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unmap_sysmem(info->base);
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return 0;
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}
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