--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PEF2256 also known as FALC56 driver
+ *
+ * Copyright 2023 CS GROUP France
+ *
+ * Author: Herve Codina <herve.codina@bootlin.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/framer/pef2256.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+/* Port Configuration 1..4 */
+#define PEF2256_PC1 0x80
+#define PEF2256_PC2 0x81
+#define PEF2256_PC3 0x82
+#define PEF2256_PC4 0x83
+#define PEF2256_12_PC_RPC_MASK GENMASK(6, 4)
+#define PEF2256_12_PC_RPC_SYPR FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x0)
+#define PEF2256_12_PC_RPC_RFM FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x1)
+#define PEF2256_12_PC_RPC_RFMB FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x2)
+#define PEF2256_12_PC_RPC_RSIGM FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x3)
+#define PEF2256_12_PC_RPC_RSIG FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x4)
+#define PEF2256_12_PC_RPC_DLR FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x5)
+#define PEF2256_12_PC_RPC_FREEZE FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x6)
+#define PEF2256_12_PC_RPC_RFSP FIELD_PREP_CONST(PEF2256_12_PC_RPC_MASK, 0x7)
+#define PEF2256_12_PC_XPC_MASK GENMASK(4, 0)
+#define PEF2256_12_PC_XPC_SYPX FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x0)
+#define PEF2256_12_PC_XPC_XFMS FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x1)
+#define PEF2256_12_PC_XPC_XSIG FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x2)
+#define PEF2256_12_PC_XPC_TCLK FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x3)
+#define PEF2256_12_PC_XPC_XMFB FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x4)
+#define PEF2256_12_PC_XPC_XSIGM FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x5)
+#define PEF2256_12_PC_XPC_DLX FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x6)
+#define PEF2256_12_PC_XPC_XCLK FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x7)
+#define PEF2256_12_PC_XPC_XLT FIELD_PREP_CONST(PEF2256_12_PC_XPC_MASK, 0x8)
+#define PEF2256_2X_PC_RPC_MASK GENMASK(7, 4)
+#define PEF2256_2X_PC_RPC_SYPR FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x0)
+#define PEF2256_2X_PC_RPC_RFM FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x1)
+#define PEF2256_2X_PC_RPC_RFMB FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x2)
+#define PEF2256_2X_PC_RPC_RSIGM FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x3)
+#define PEF2256_2X_PC_RPC_RSIG FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x4)
+#define PEF2256_2X_PC_RPC_DLR FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x5)
+#define PEF2256_2X_PC_RPC_FREEZE FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x6)
+#define PEF2256_2X_PC_RPC_RFSP FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x7)
+#define PEF2256_2X_PC_RPC_GPI FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0x9)
+#define PEF2256_2X_PC_RPC_GPOH FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0xa)
+#define PEF2256_2X_PC_RPC_GPOL FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0xb)
+#define PEF2256_2X_PC_RPC_LOS FIELD_PREP_CONST(PEF2256_2X_PC_RPC_MASK, 0xc)
+#define PEF2256_2X_PC_XPC_MASK GENMASK(3, 0)
+#define PEF2256_2X_PC_XPC_SYPX FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x0)
+#define PEF2256_2X_PC_XPC_XFMS FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x1)
+#define PEF2256_2X_PC_XPC_XSIG FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x2)
+#define PEF2256_2X_PC_XPC_TCLK FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x3)
+#define PEF2256_2X_PC_XPC_XMFB FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x4)
+#define PEF2256_2X_PC_XPC_XSIGM FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x5)
+#define PEF2256_2X_PC_XPC_DLX FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x6)
+#define PEF2256_2X_PC_XPC_XCLK FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x7)
+#define PEF2256_2X_PC_XPC_XLT FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x8)
+#define PEF2256_2X_PC_XPC_GPI FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0x9)
+#define PEF2256_2X_PC_XPC_GPOH FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0xa)
+#define PEF2256_2X_PC_XPC_GPOL FIELD_PREP_CONST(PEF2256_2X_PC_XPC_MASK, 0xb)
+
+struct pef2256_pinreg_desc {
+ int offset;
+ u8 mask;
+};
+
+struct pef2256_function_desc {
+ const char *name;
+ const char * const*groups;
+ unsigned int ngroups;
+ u8 func_val;
+};
+
+struct pef2256_pinctrl {
+ struct device *dev;
+ struct regmap *regmap;
+ enum pef2256_version version;
+ struct pinctrl_desc pctrl_desc;
+ const struct pef2256_function_desc *functions;
+ unsigned int nfunctions;
+};
+
+static int pef2256_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+ /* We map 1 group <-> 1 pin */
+ return pef2256->pctrl_desc.npins;
+}
+
+static const char *pef2256_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+ /* We map 1 group <-> 1 pin */
+ return pef2256->pctrl_desc.pins[selector].name;
+}
+
+static int pef2256_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector,
+ const unsigned int **pins,
+ unsigned int *num_pins)
+{
+ struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+ /* We map 1 group <-> 1 pin */
+ *pins = &pef2256->pctrl_desc.pins[selector].number;
+ *num_pins = 1;
+
+ return 0;
+}
+
+static const struct pinctrl_ops pef2256_pctlops = {
+ .get_groups_count = pef2256_get_groups_count,
+ .get_group_name = pef2256_get_group_name,
+ .get_group_pins = pef2256_get_group_pins,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+ .dt_free_map = pinconf_generic_dt_free_map,
+};
+
+static int pef2256_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+ return pef2256->nfunctions;
+}
+
+static const char *pef2256_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+ return pef2256->functions[selector].name;
+}
+
+static int pef2256_get_function_groups(struct pinctrl_dev *pctldev, unsigned int selector,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = pef2256->functions[selector].groups;
+ *num_groups = pef2256->functions[selector].ngroups;
+ return 0;
+}
+
+static int pef2256_set_mux(struct pinctrl_dev *pctldev, unsigned int func_selector,
+ unsigned int group_selector)
+{
+ struct pef2256_pinctrl *pef2256 = pinctrl_dev_get_drvdata(pctldev);
+ const struct pef2256_pinreg_desc *pinreg_desc;
+ u8 func_val;
+
+ /* We map 1 group <-> 1 pin */
+ pinreg_desc = pef2256->pctrl_desc.pins[group_selector].drv_data;
+ func_val = pef2256->functions[func_selector].func_val;
+
+ return regmap_update_bits(pef2256->regmap, pinreg_desc->offset,
+ pinreg_desc->mask, func_val);
+}
+
+static const struct pinmux_ops pef2256_pmxops = {
+ .get_functions_count = pef2256_get_functions_count,
+ .get_function_name = pef2256_get_function_name,
+ .get_function_groups = pef2256_get_function_groups,
+ .set_mux = pef2256_set_mux,
+};
+
+#define PEF2256_PINCTRL_PIN(_number, _name, _offset, _mask) { \
+ .number = _number, \
+ .name = _name, \
+ .drv_data = &(struct pef2256_pinreg_desc) { \
+ .offset = _offset, \
+ .mask = _mask, \
+ }, \
+}
+
+static const struct pinctrl_pin_desc pef2256_v12_pins[] = {
+ PEF2256_PINCTRL_PIN(0, "RPA", PEF2256_PC1, PEF2256_12_PC_RPC_MASK),
+ PEF2256_PINCTRL_PIN(1, "RPB", PEF2256_PC2, PEF2256_12_PC_RPC_MASK),
+ PEF2256_PINCTRL_PIN(2, "RPC", PEF2256_PC3, PEF2256_12_PC_RPC_MASK),
+ PEF2256_PINCTRL_PIN(3, "RPD", PEF2256_PC4, PEF2256_12_PC_RPC_MASK),
+ PEF2256_PINCTRL_PIN(4, "XPA", PEF2256_PC1, PEF2256_12_PC_XPC_MASK),
+ PEF2256_PINCTRL_PIN(5, "XPB", PEF2256_PC2, PEF2256_12_PC_XPC_MASK),
+ PEF2256_PINCTRL_PIN(6, "XPC", PEF2256_PC3, PEF2256_12_PC_XPC_MASK),
+ PEF2256_PINCTRL_PIN(7, "XPD", PEF2256_PC4, PEF2256_12_PC_XPC_MASK),
+};
+
+static const struct pinctrl_pin_desc pef2256_v2x_pins[] = {
+ PEF2256_PINCTRL_PIN(0, "RPA", PEF2256_PC1, PEF2256_2X_PC_RPC_MASK),
+ PEF2256_PINCTRL_PIN(1, "RPB", PEF2256_PC2, PEF2256_2X_PC_RPC_MASK),
+ PEF2256_PINCTRL_PIN(2, "RPC", PEF2256_PC3, PEF2256_2X_PC_RPC_MASK),
+ PEF2256_PINCTRL_PIN(3, "RPD", PEF2256_PC4, PEF2256_2X_PC_RPC_MASK),
+ PEF2256_PINCTRL_PIN(4, "XPA", PEF2256_PC1, PEF2256_2X_PC_XPC_MASK),
+ PEF2256_PINCTRL_PIN(5, "XPB", PEF2256_PC2, PEF2256_2X_PC_XPC_MASK),
+ PEF2256_PINCTRL_PIN(6, "XPC", PEF2256_PC3, PEF2256_2X_PC_XPC_MASK),
+ PEF2256_PINCTRL_PIN(7, "XPD", PEF2256_PC4, PEF2256_2X_PC_XPC_MASK),
+};
+
+static const char *const pef2256_rp_groups[] = { "RPA", "RPB", "RPC", "RPD" };
+static const char *const pef2256_xp_groups[] = { "XPA", "XPB", "XPC", "XPD" };
+static const char *const pef2256_all_groups[] = { "RPA", "RPB", "RPC", "RPD",
+ "XPA", "XPB", "XPC", "XPD" };
+
+#define PEF2256_FUNCTION(_name, _func_val, _groups) { \
+ .name = _name, \
+ .groups = _groups, \
+ .ngroups = ARRAY_SIZE(_groups), \
+ .func_val = _func_val, \
+}
+
+static const struct pef2256_function_desc pef2256_v2x_functions[] = {
+ PEF2256_FUNCTION("SYPR", PEF2256_2X_PC_RPC_SYPR, pef2256_rp_groups),
+ PEF2256_FUNCTION("RFM", PEF2256_2X_PC_RPC_RFM, pef2256_rp_groups),
+ PEF2256_FUNCTION("RFMB", PEF2256_2X_PC_RPC_RFMB, pef2256_rp_groups),
+ PEF2256_FUNCTION("RSIGM", PEF2256_2X_PC_RPC_RSIGM, pef2256_rp_groups),
+ PEF2256_FUNCTION("RSIG", PEF2256_2X_PC_RPC_RSIG, pef2256_rp_groups),
+ PEF2256_FUNCTION("DLR", PEF2256_2X_PC_RPC_DLR, pef2256_rp_groups),
+ PEF2256_FUNCTION("FREEZE", PEF2256_2X_PC_RPC_FREEZE, pef2256_rp_groups),
+ PEF2256_FUNCTION("RFSP", PEF2256_2X_PC_RPC_RFSP, pef2256_rp_groups),
+ PEF2256_FUNCTION("LOS", PEF2256_2X_PC_RPC_LOS, pef2256_rp_groups),
+
+ PEF2256_FUNCTION("SYPX", PEF2256_2X_PC_XPC_SYPX, pef2256_xp_groups),
+ PEF2256_FUNCTION("XFMS", PEF2256_2X_PC_XPC_XFMS, pef2256_xp_groups),
+ PEF2256_FUNCTION("XSIG", PEF2256_2X_PC_XPC_XSIG, pef2256_xp_groups),
+ PEF2256_FUNCTION("TCLK", PEF2256_2X_PC_XPC_TCLK, pef2256_xp_groups),
+ PEF2256_FUNCTION("XMFB", PEF2256_2X_PC_XPC_XMFB, pef2256_xp_groups),
+ PEF2256_FUNCTION("XSIGM", PEF2256_2X_PC_XPC_XSIGM, pef2256_xp_groups),
+ PEF2256_FUNCTION("DLX", PEF2256_2X_PC_XPC_DLX, pef2256_xp_groups),
+ PEF2256_FUNCTION("XCLK", PEF2256_2X_PC_XPC_XCLK, pef2256_xp_groups),
+ PEF2256_FUNCTION("XLT", PEF2256_2X_PC_XPC_XLT, pef2256_xp_groups),
+
+ PEF2256_FUNCTION("GPI", PEF2256_2X_PC_RPC_GPI | PEF2256_2X_PC_XPC_GPI,
+ pef2256_all_groups),
+ PEF2256_FUNCTION("GPOH", PEF2256_2X_PC_RPC_GPOH | PEF2256_2X_PC_XPC_GPOH,
+ pef2256_all_groups),
+ PEF2256_FUNCTION("GPOL", PEF2256_2X_PC_RPC_GPOL | PEF2256_2X_PC_XPC_GPOL,
+ pef2256_all_groups),
+};
+
+static const struct pef2256_function_desc pef2256_v12_functions[] = {
+ PEF2256_FUNCTION("SYPR", PEF2256_12_PC_RPC_SYPR, pef2256_rp_groups),
+ PEF2256_FUNCTION("RFM", PEF2256_12_PC_RPC_RFM, pef2256_rp_groups),
+ PEF2256_FUNCTION("RFMB", PEF2256_12_PC_RPC_RFMB, pef2256_rp_groups),
+ PEF2256_FUNCTION("RSIGM", PEF2256_12_PC_RPC_RSIGM, pef2256_rp_groups),
+ PEF2256_FUNCTION("RSIG", PEF2256_12_PC_RPC_RSIG, pef2256_rp_groups),
+ PEF2256_FUNCTION("DLR", PEF2256_12_PC_RPC_DLR, pef2256_rp_groups),
+ PEF2256_FUNCTION("FREEZE", PEF2256_12_PC_RPC_FREEZE, pef2256_rp_groups),
+ PEF2256_FUNCTION("RFSP", PEF2256_12_PC_RPC_RFSP, pef2256_rp_groups),
+
+ PEF2256_FUNCTION("SYPX", PEF2256_12_PC_XPC_SYPX, pef2256_xp_groups),
+ PEF2256_FUNCTION("XFMS", PEF2256_12_PC_XPC_XFMS, pef2256_xp_groups),
+ PEF2256_FUNCTION("XSIG", PEF2256_12_PC_XPC_XSIG, pef2256_xp_groups),
+ PEF2256_FUNCTION("TCLK", PEF2256_12_PC_XPC_TCLK, pef2256_xp_groups),
+ PEF2256_FUNCTION("XMFB", PEF2256_12_PC_XPC_XMFB, pef2256_xp_groups),
+ PEF2256_FUNCTION("XSIGM", PEF2256_12_PC_XPC_XSIGM, pef2256_xp_groups),
+ PEF2256_FUNCTION("DLX", PEF2256_12_PC_XPC_DLX, pef2256_xp_groups),
+ PEF2256_FUNCTION("XCLK", PEF2256_12_PC_XPC_XCLK, pef2256_xp_groups),
+ PEF2256_FUNCTION("XLT", PEF2256_12_PC_XPC_XLT, pef2256_xp_groups),
+};
+
+static int pef2256_register_pinctrl(struct pef2256_pinctrl *pef2256)
+{
+ struct pinctrl_dev *pctrl;
+
+ pef2256->pctrl_desc.name = dev_name(pef2256->dev);
+ pef2256->pctrl_desc.owner = THIS_MODULE;
+ pef2256->pctrl_desc.pctlops = &pef2256_pctlops;
+ pef2256->pctrl_desc.pmxops = &pef2256_pmxops;
+ if (pef2256->version == PEF2256_VERSION_1_2) {
+ pef2256->pctrl_desc.pins = pef2256_v12_pins;
+ pef2256->pctrl_desc.npins = ARRAY_SIZE(pef2256_v12_pins);
+ pef2256->functions = pef2256_v12_functions;
+ pef2256->nfunctions = ARRAY_SIZE(pef2256_v12_functions);
+ } else {
+ pef2256->pctrl_desc.pins = pef2256_v2x_pins;
+ pef2256->pctrl_desc.npins = ARRAY_SIZE(pef2256_v2x_pins);
+ pef2256->functions = pef2256_v2x_functions;
+ pef2256->nfunctions = ARRAY_SIZE(pef2256_v2x_functions);
+ }
+
+ pctrl = devm_pinctrl_register(pef2256->dev, &pef2256->pctrl_desc, pef2256);
+ if (IS_ERR(pctrl))
+ return dev_err_probe(pef2256->dev, PTR_ERR(pctrl),
+ "pinctrl driver registration failed\n");
+
+ return 0;
+}
+
+static void pef2256_reset_pinmux(struct pef2256_pinctrl *pef2256)
+{
+ u8 val;
+ /*
+ * Reset values cannot be used.
+ * They define the SYPR/SYPX pin mux for all the RPx and XPx pins and
+ * Only one pin can be muxed to SYPR and one pin can be muxed to SYPX.
+ * Choose here an other reset value.
+ */
+ if (pef2256->version == PEF2256_VERSION_1_2)
+ val = PEF2256_12_PC_XPC_XCLK | PEF2256_12_PC_RPC_RFSP;
+ else
+ val = PEF2256_2X_PC_XPC_GPI | PEF2256_2X_PC_RPC_GPI;
+
+ regmap_write(pef2256->regmap, PEF2256_PC1, val);
+ regmap_write(pef2256->regmap, PEF2256_PC2, val);
+ regmap_write(pef2256->regmap, PEF2256_PC3, val);
+ regmap_write(pef2256->regmap, PEF2256_PC4, val);
+}
+
+static int pef2256_pinctrl_probe(struct platform_device *pdev)
+{
+ struct pef2256_pinctrl *pef2256_pinctrl;
+ struct pef2256 *pef2256;
+ int ret;
+
+ pef2256_pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pef2256_pinctrl), GFP_KERNEL);
+ if (!pef2256_pinctrl)
+ return -ENOMEM;
+
+ device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
+
+ pef2256 = dev_get_drvdata(pdev->dev.parent);
+
+ pef2256_pinctrl->dev = &pdev->dev;
+ pef2256_pinctrl->regmap = pef2256_get_regmap(pef2256);
+ pef2256_pinctrl->version = pef2256_get_version(pef2256);
+
+ platform_set_drvdata(pdev, pef2256_pinctrl);
+
+ pef2256_reset_pinmux(pef2256_pinctrl);
+ ret = pef2256_register_pinctrl(pef2256_pinctrl);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static struct platform_driver pef2256_pinctrl_driver = {
+ .driver = {
+ .name = "lantiq-pef2256-pinctrl",
+ },
+ .probe = pef2256_pinctrl_probe,
+};
+module_platform_driver(pef2256_pinctrl_driver);
+
+MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>");
+MODULE_DESCRIPTION("PEF2256 pin controller driver");
+MODULE_LICENSE("GPL");
git.samba.org / sfrench / cifs-2.6.git / commitdiff