1745df68dSPeng Fan /* 2745df68dSPeng Fan * Copyright (C) 2016 Peng Fan <van.freenix@gmail.com> 3745df68dSPeng Fan * 4745df68dSPeng Fan * SPDX-License-Identifier: GPL-2.0+ 5745df68dSPeng Fan */ 6745df68dSPeng Fan 7745df68dSPeng Fan #include <common.h> 8745df68dSPeng Fan #include <mapmem.h> 9745df68dSPeng Fan #include <linux/io.h> 10745df68dSPeng Fan #include <linux/err.h> 11745df68dSPeng Fan #include <dm/device.h> 12745df68dSPeng Fan #include <dm/pinctrl.h> 13745df68dSPeng Fan 14745df68dSPeng Fan #include "pinctrl-imx.h" 15745df68dSPeng Fan 16745df68dSPeng Fan DECLARE_GLOBAL_DATA_PTR; 17745df68dSPeng Fan 18745df68dSPeng Fan static int imx_pinctrl_set_state(struct udevice *dev, struct udevice *config) 19745df68dSPeng Fan { 20745df68dSPeng Fan struct imx_pinctrl_priv *priv = dev_get_priv(dev); 21745df68dSPeng Fan struct imx_pinctrl_soc_info *info = priv->info; 22e160f7d4SSimon Glass int node = dev_of_offset(config); 23745df68dSPeng Fan const struct fdt_property *prop; 24745df68dSPeng Fan u32 *pin_data; 25745df68dSPeng Fan int npins, size, pin_size; 26745df68dSPeng Fan int mux_reg, conf_reg, input_reg, input_val, mux_mode, config_val; 27*4aa9d4d0SPeng Fan u32 mux_shift = info->mux_mask ? ffs(info->mux_mask) - 1 : 0; 28745df68dSPeng Fan int i, j = 0; 29745df68dSPeng Fan 30745df68dSPeng Fan dev_dbg(dev, "%s: %s\n", __func__, config->name); 31745df68dSPeng Fan 32745df68dSPeng Fan if (info->flags & SHARE_MUX_CONF_REG) 33745df68dSPeng Fan pin_size = SHARE_FSL_PIN_SIZE; 34745df68dSPeng Fan else 35745df68dSPeng Fan pin_size = FSL_PIN_SIZE; 36745df68dSPeng Fan 37745df68dSPeng Fan prop = fdt_getprop(gd->fdt_blob, node, "fsl,pins", &size); 38745df68dSPeng Fan if (!prop) { 39745df68dSPeng Fan dev_err(dev, "No fsl,pins property in node %s\n", config->name); 40745df68dSPeng Fan return -EINVAL; 41745df68dSPeng Fan } 42745df68dSPeng Fan 43745df68dSPeng Fan if (!size || size % pin_size) { 44745df68dSPeng Fan dev_err(dev, "Invalid fsl,pins property in node %s\n", 45745df68dSPeng Fan config->name); 46745df68dSPeng Fan return -EINVAL; 47745df68dSPeng Fan } 48745df68dSPeng Fan 49745df68dSPeng Fan pin_data = devm_kzalloc(dev, size, 0); 50745df68dSPeng Fan if (!pin_data) 51745df68dSPeng Fan return -ENOMEM; 52745df68dSPeng Fan 53745df68dSPeng Fan if (fdtdec_get_int_array(gd->fdt_blob, node, "fsl,pins", 54745df68dSPeng Fan pin_data, size >> 2)) { 55745df68dSPeng Fan dev_err(dev, "Error reading pin data.\n"); 56745df68dSPeng Fan return -EINVAL; 57745df68dSPeng Fan } 58745df68dSPeng Fan 59745df68dSPeng Fan npins = size / pin_size; 60745df68dSPeng Fan 61745df68dSPeng Fan /* 62745df68dSPeng Fan * Refer to linux documentation for details: 63745df68dSPeng Fan * Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt 64745df68dSPeng Fan */ 65745df68dSPeng Fan for (i = 0; i < npins; i++) { 66745df68dSPeng Fan mux_reg = pin_data[j++]; 67745df68dSPeng Fan 68745df68dSPeng Fan if (!(info->flags & ZERO_OFFSET_VALID) && !mux_reg) 69745df68dSPeng Fan mux_reg = -1; 70745df68dSPeng Fan 71745df68dSPeng Fan if (info->flags & SHARE_MUX_CONF_REG) { 72745df68dSPeng Fan conf_reg = mux_reg; 73745df68dSPeng Fan } else { 74745df68dSPeng Fan conf_reg = pin_data[j++]; 75745df68dSPeng Fan if (!(info->flags & ZERO_OFFSET_VALID) && !conf_reg) 76745df68dSPeng Fan conf_reg = -1; 77745df68dSPeng Fan } 78745df68dSPeng Fan 79745df68dSPeng Fan if ((mux_reg == -1) || (conf_reg == -1)) { 80745df68dSPeng Fan dev_err(dev, "Error mux_reg or conf_reg\n"); 81745df68dSPeng Fan return -EINVAL; 82745df68dSPeng Fan } 83745df68dSPeng Fan 84745df68dSPeng Fan input_reg = pin_data[j++]; 85745df68dSPeng Fan mux_mode = pin_data[j++]; 86745df68dSPeng Fan input_val = pin_data[j++]; 87745df68dSPeng Fan config_val = pin_data[j++]; 88745df68dSPeng Fan 89745df68dSPeng Fan dev_dbg(dev, "mux_reg 0x%x, conf_reg 0x%x, input_reg 0x%x, " 90745df68dSPeng Fan "mux_mode 0x%x, input_val 0x%x, config_val 0x%x\n", 91745df68dSPeng Fan mux_reg, conf_reg, input_reg, mux_mode, input_val, 92745df68dSPeng Fan config_val); 93745df68dSPeng Fan 94745df68dSPeng Fan if (config_val & IMX_PAD_SION) 95745df68dSPeng Fan mux_mode |= IOMUXC_CONFIG_SION; 96745df68dSPeng Fan 97745df68dSPeng Fan config_val &= ~IMX_PAD_SION; 98745df68dSPeng Fan 99745df68dSPeng Fan /* Set Mux */ 100745df68dSPeng Fan if (info->flags & SHARE_MUX_CONF_REG) { 101*4aa9d4d0SPeng Fan clrsetbits_le32(info->base + mux_reg, info->mux_mask, 102*4aa9d4d0SPeng Fan mux_mode << mux_shift); 103745df68dSPeng Fan } else { 104745df68dSPeng Fan writel(mux_mode, info->base + mux_reg); 105745df68dSPeng Fan } 106745df68dSPeng Fan 107745df68dSPeng Fan dev_dbg(dev, "write mux: offset 0x%x val 0x%x\n", mux_reg, 108745df68dSPeng Fan mux_mode); 109745df68dSPeng Fan 110745df68dSPeng Fan /* 111745df68dSPeng Fan * Set select input 112745df68dSPeng Fan * 113745df68dSPeng Fan * If the select input value begins with 0xff, it's a quirky 114745df68dSPeng Fan * select input and the value should be interpreted as below. 115745df68dSPeng Fan * 31 23 15 7 0 116745df68dSPeng Fan * | 0xff | shift | width | select | 117745df68dSPeng Fan * It's used to work around the problem that the select 118745df68dSPeng Fan * input for some pin is not implemented in the select 119745df68dSPeng Fan * input register but in some general purpose register. 120745df68dSPeng Fan * We encode the select input value, width and shift of 121745df68dSPeng Fan * the bit field into input_val cell of pin function ID 122745df68dSPeng Fan * in device tree, and then decode them here for setting 123745df68dSPeng Fan * up the select input bits in general purpose register. 124745df68dSPeng Fan */ 125745df68dSPeng Fan 126745df68dSPeng Fan if (input_val >> 24 == 0xff) { 127745df68dSPeng Fan u32 val = input_val; 128745df68dSPeng Fan u8 select = val & 0xff; 129745df68dSPeng Fan u8 width = (val >> 8) & 0xff; 130745df68dSPeng Fan u8 shift = (val >> 16) & 0xff; 131745df68dSPeng Fan u32 mask = ((1 << width) - 1) << shift; 132745df68dSPeng Fan /* 133745df68dSPeng Fan * The input_reg[i] here is actually some IOMUXC general 134745df68dSPeng Fan * purpose register, not regular select input register. 135745df68dSPeng Fan */ 136745df68dSPeng Fan val = readl(info->base + input_reg); 137745df68dSPeng Fan val &= ~mask; 138745df68dSPeng Fan val |= select << shift; 139745df68dSPeng Fan writel(val, info->base + input_reg); 140745df68dSPeng Fan } else if (input_reg) { 141745df68dSPeng Fan /* 142745df68dSPeng Fan * Regular select input register can never be at offset 143745df68dSPeng Fan * 0, and we only print register value for regular case. 144745df68dSPeng Fan */ 145745df68dSPeng Fan if (info->input_sel_base) 146745df68dSPeng Fan writel(input_val, info->input_sel_base + 147745df68dSPeng Fan input_reg); 148745df68dSPeng Fan else 149745df68dSPeng Fan writel(input_val, info->base + input_reg); 150745df68dSPeng Fan 151745df68dSPeng Fan dev_dbg(dev, "select_input: offset 0x%x val 0x%x\n", 152745df68dSPeng Fan input_reg, input_val); 153745df68dSPeng Fan } 154745df68dSPeng Fan 155745df68dSPeng Fan /* Set config */ 156745df68dSPeng Fan if (!(config_val & IMX_NO_PAD_CTL)) { 157745df68dSPeng Fan if (info->flags & SHARE_MUX_CONF_REG) { 158*4aa9d4d0SPeng Fan clrsetbits_le32(info->base + conf_reg, 159*4aa9d4d0SPeng Fan info->mux_mask, config_val); 160745df68dSPeng Fan } else { 161745df68dSPeng Fan writel(config_val, info->base + conf_reg); 162745df68dSPeng Fan } 163745df68dSPeng Fan 164745df68dSPeng Fan dev_dbg(dev, "write config: offset 0x%x val 0x%x\n", 165745df68dSPeng Fan conf_reg, config_val); 166745df68dSPeng Fan } 167745df68dSPeng Fan } 168745df68dSPeng Fan 169745df68dSPeng Fan return 0; 170745df68dSPeng Fan } 171745df68dSPeng Fan 172745df68dSPeng Fan const struct pinctrl_ops imx_pinctrl_ops = { 173745df68dSPeng Fan .set_state = imx_pinctrl_set_state, 174745df68dSPeng Fan }; 175745df68dSPeng Fan 176745df68dSPeng Fan int imx_pinctrl_probe(struct udevice *dev, 177745df68dSPeng Fan struct imx_pinctrl_soc_info *info) 178745df68dSPeng Fan { 179745df68dSPeng Fan struct imx_pinctrl_priv *priv = dev_get_priv(dev); 180e160f7d4SSimon Glass int node = dev_of_offset(dev), ret; 181745df68dSPeng Fan struct fdtdec_phandle_args arg; 182745df68dSPeng Fan fdt_addr_t addr; 183745df68dSPeng Fan fdt_size_t size; 184745df68dSPeng Fan 185745df68dSPeng Fan if (!info) { 186745df68dSPeng Fan dev_err(dev, "wrong pinctrl info\n"); 187745df68dSPeng Fan return -EINVAL; 188745df68dSPeng Fan } 189745df68dSPeng Fan 190745df68dSPeng Fan priv->dev = dev; 191745df68dSPeng Fan priv->info = info; 192745df68dSPeng Fan 193e160f7d4SSimon Glass addr = fdtdec_get_addr_size(gd->fdt_blob, dev_of_offset(dev), "reg", 194e160f7d4SSimon Glass &size); 195745df68dSPeng Fan 196745df68dSPeng Fan if (addr == FDT_ADDR_T_NONE) 197745df68dSPeng Fan return -EINVAL; 198745df68dSPeng Fan 199745df68dSPeng Fan info->base = map_sysmem(addr, size); 200745df68dSPeng Fan if (!info->base) 201745df68dSPeng Fan return -ENOMEM; 202745df68dSPeng Fan priv->info = info; 203745df68dSPeng Fan 204*4aa9d4d0SPeng Fan info->mux_mask = fdtdec_get_int(gd->fdt_blob, node, "fsl,mux_mask", 0); 205745df68dSPeng Fan /* 206745df68dSPeng Fan * Refer to linux documentation for details: 207745df68dSPeng Fan * Documentation/devicetree/bindings/pinctrl/fsl,imx7d-pinctrl.txt 208745df68dSPeng Fan */ 209745df68dSPeng Fan if (fdtdec_get_bool(gd->fdt_blob, node, "fsl,input-sel")) { 210745df68dSPeng Fan ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, 211745df68dSPeng Fan node, "fsl,input-sel", 212745df68dSPeng Fan NULL, 0, 0, &arg); 213745df68dSPeng Fan if (ret) { 214745df68dSPeng Fan dev_err(dev, "iomuxc fsl,input-sel property not found\n"); 215745df68dSPeng Fan return -EINVAL; 216745df68dSPeng Fan } 217745df68dSPeng Fan 218745df68dSPeng Fan addr = fdtdec_get_addr_size(gd->fdt_blob, arg.node, "reg", 219745df68dSPeng Fan &size); 220745df68dSPeng Fan if (addr == FDT_ADDR_T_NONE) 221745df68dSPeng Fan return -EINVAL; 222745df68dSPeng Fan 223745df68dSPeng Fan info->input_sel_base = map_sysmem(addr, size); 224745df68dSPeng Fan if (!info->input_sel_base) 225745df68dSPeng Fan return -ENOMEM; 226745df68dSPeng Fan } 227745df68dSPeng Fan 2285a6f8d7bSStefan Agner dev_dbg(dev, "initialized IMX pinctrl driver\n"); 229745df68dSPeng Fan 230745df68dSPeng Fan return 0; 231745df68dSPeng Fan } 232745df68dSPeng Fan 233745df68dSPeng Fan int imx_pinctrl_remove(struct udevice *dev) 234745df68dSPeng Fan { 235745df68dSPeng Fan struct imx_pinctrl_priv *priv = dev_get_priv(dev); 236745df68dSPeng Fan struct imx_pinctrl_soc_info *info = priv->info; 237745df68dSPeng Fan 238745df68dSPeng Fan if (info->input_sel_base) 239745df68dSPeng Fan unmap_sysmem(info->input_sel_base); 240745df68dSPeng Fan if (info->base) 241745df68dSPeng Fan unmap_sysmem(info->base); 242745df68dSPeng Fan 243745df68dSPeng Fan return 0; 244745df68dSPeng Fan } 245