1*745df68dSPeng Fan /* 2*745df68dSPeng Fan * Copyright (C) 2016 Peng Fan <van.freenix@gmail.com> 3*745df68dSPeng Fan * 4*745df68dSPeng Fan * SPDX-License-Identifier: GPL-2.0+ 5*745df68dSPeng Fan */ 6*745df68dSPeng Fan 7*745df68dSPeng Fan #include <common.h> 8*745df68dSPeng Fan #include <mapmem.h> 9*745df68dSPeng Fan #include <linux/io.h> 10*745df68dSPeng Fan #include <linux/err.h> 11*745df68dSPeng Fan #include <dm/device.h> 12*745df68dSPeng Fan #include <dm/pinctrl.h> 13*745df68dSPeng Fan 14*745df68dSPeng Fan #include "pinctrl-imx.h" 15*745df68dSPeng Fan 16*745df68dSPeng Fan DECLARE_GLOBAL_DATA_PTR; 17*745df68dSPeng Fan 18*745df68dSPeng Fan static int imx_pinctrl_set_state(struct udevice *dev, struct udevice *config) 19*745df68dSPeng Fan { 20*745df68dSPeng Fan struct imx_pinctrl_priv *priv = dev_get_priv(dev); 21*745df68dSPeng Fan struct imx_pinctrl_soc_info *info = priv->info; 22*745df68dSPeng Fan int node = config->of_offset; 23*745df68dSPeng Fan const struct fdt_property *prop; 24*745df68dSPeng Fan u32 *pin_data; 25*745df68dSPeng Fan int npins, size, pin_size; 26*745df68dSPeng Fan int mux_reg, conf_reg, input_reg, input_val, mux_mode, config_val; 27*745df68dSPeng Fan int i, j = 0; 28*745df68dSPeng Fan 29*745df68dSPeng Fan dev_dbg(dev, "%s: %s\n", __func__, config->name); 30*745df68dSPeng Fan 31*745df68dSPeng Fan if (info->flags & SHARE_MUX_CONF_REG) 32*745df68dSPeng Fan pin_size = SHARE_FSL_PIN_SIZE; 33*745df68dSPeng Fan else 34*745df68dSPeng Fan pin_size = FSL_PIN_SIZE; 35*745df68dSPeng Fan 36*745df68dSPeng Fan prop = fdt_getprop(gd->fdt_blob, node, "fsl,pins", &size); 37*745df68dSPeng Fan if (!prop) { 38*745df68dSPeng Fan dev_err(dev, "No fsl,pins property in node %s\n", config->name); 39*745df68dSPeng Fan return -EINVAL; 40*745df68dSPeng Fan } 41*745df68dSPeng Fan 42*745df68dSPeng Fan if (!size || size % pin_size) { 43*745df68dSPeng Fan dev_err(dev, "Invalid fsl,pins property in node %s\n", 44*745df68dSPeng Fan config->name); 45*745df68dSPeng Fan return -EINVAL; 46*745df68dSPeng Fan } 47*745df68dSPeng Fan 48*745df68dSPeng Fan pin_data = devm_kzalloc(dev, size, 0); 49*745df68dSPeng Fan if (!pin_data) 50*745df68dSPeng Fan return -ENOMEM; 51*745df68dSPeng Fan 52*745df68dSPeng Fan if (fdtdec_get_int_array(gd->fdt_blob, node, "fsl,pins", 53*745df68dSPeng Fan pin_data, size >> 2)) { 54*745df68dSPeng Fan dev_err(dev, "Error reading pin data.\n"); 55*745df68dSPeng Fan return -EINVAL; 56*745df68dSPeng Fan } 57*745df68dSPeng Fan 58*745df68dSPeng Fan npins = size / pin_size; 59*745df68dSPeng Fan 60*745df68dSPeng Fan /* 61*745df68dSPeng Fan * Refer to linux documentation for details: 62*745df68dSPeng Fan * Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt 63*745df68dSPeng Fan */ 64*745df68dSPeng Fan for (i = 0; i < npins; i++) { 65*745df68dSPeng Fan mux_reg = pin_data[j++]; 66*745df68dSPeng Fan 67*745df68dSPeng Fan if (!(info->flags & ZERO_OFFSET_VALID) && !mux_reg) 68*745df68dSPeng Fan mux_reg = -1; 69*745df68dSPeng Fan 70*745df68dSPeng Fan if (info->flags & SHARE_MUX_CONF_REG) { 71*745df68dSPeng Fan conf_reg = mux_reg; 72*745df68dSPeng Fan } else { 73*745df68dSPeng Fan conf_reg = pin_data[j++]; 74*745df68dSPeng Fan if (!(info->flags & ZERO_OFFSET_VALID) && !conf_reg) 75*745df68dSPeng Fan conf_reg = -1; 76*745df68dSPeng Fan } 77*745df68dSPeng Fan 78*745df68dSPeng Fan if ((mux_reg == -1) || (conf_reg == -1)) { 79*745df68dSPeng Fan dev_err(dev, "Error mux_reg or conf_reg\n"); 80*745df68dSPeng Fan return -EINVAL; 81*745df68dSPeng Fan } 82*745df68dSPeng Fan 83*745df68dSPeng Fan input_reg = pin_data[j++]; 84*745df68dSPeng Fan mux_mode = pin_data[j++]; 85*745df68dSPeng Fan input_val = pin_data[j++]; 86*745df68dSPeng Fan config_val = pin_data[j++]; 87*745df68dSPeng Fan 88*745df68dSPeng Fan dev_dbg(dev, "mux_reg 0x%x, conf_reg 0x%x, input_reg 0x%x, " 89*745df68dSPeng Fan "mux_mode 0x%x, input_val 0x%x, config_val 0x%x\n", 90*745df68dSPeng Fan mux_reg, conf_reg, input_reg, mux_mode, input_val, 91*745df68dSPeng Fan config_val); 92*745df68dSPeng Fan 93*745df68dSPeng Fan if (config_val & IMX_PAD_SION) 94*745df68dSPeng Fan mux_mode |= IOMUXC_CONFIG_SION; 95*745df68dSPeng Fan 96*745df68dSPeng Fan config_val &= ~IMX_PAD_SION; 97*745df68dSPeng Fan 98*745df68dSPeng Fan /* Set Mux */ 99*745df68dSPeng Fan if (info->flags & SHARE_MUX_CONF_REG) { 100*745df68dSPeng Fan clrsetbits_le32(info->base + mux_reg, 0x7 << 20, 101*745df68dSPeng Fan mux_mode << 20); 102*745df68dSPeng Fan } else { 103*745df68dSPeng Fan writel(mux_mode, info->base + mux_reg); 104*745df68dSPeng Fan } 105*745df68dSPeng Fan 106*745df68dSPeng Fan dev_dbg(dev, "write mux: offset 0x%x val 0x%x\n", mux_reg, 107*745df68dSPeng Fan mux_mode); 108*745df68dSPeng Fan 109*745df68dSPeng Fan /* 110*745df68dSPeng Fan * Set select input 111*745df68dSPeng Fan * 112*745df68dSPeng Fan * If the select input value begins with 0xff, it's a quirky 113*745df68dSPeng Fan * select input and the value should be interpreted as below. 114*745df68dSPeng Fan * 31 23 15 7 0 115*745df68dSPeng Fan * | 0xff | shift | width | select | 116*745df68dSPeng Fan * It's used to work around the problem that the select 117*745df68dSPeng Fan * input for some pin is not implemented in the select 118*745df68dSPeng Fan * input register but in some general purpose register. 119*745df68dSPeng Fan * We encode the select input value, width and shift of 120*745df68dSPeng Fan * the bit field into input_val cell of pin function ID 121*745df68dSPeng Fan * in device tree, and then decode them here for setting 122*745df68dSPeng Fan * up the select input bits in general purpose register. 123*745df68dSPeng Fan */ 124*745df68dSPeng Fan 125*745df68dSPeng Fan if (input_val >> 24 == 0xff) { 126*745df68dSPeng Fan u32 val = input_val; 127*745df68dSPeng Fan u8 select = val & 0xff; 128*745df68dSPeng Fan u8 width = (val >> 8) & 0xff; 129*745df68dSPeng Fan u8 shift = (val >> 16) & 0xff; 130*745df68dSPeng Fan u32 mask = ((1 << width) - 1) << shift; 131*745df68dSPeng Fan /* 132*745df68dSPeng Fan * The input_reg[i] here is actually some IOMUXC general 133*745df68dSPeng Fan * purpose register, not regular select input register. 134*745df68dSPeng Fan */ 135*745df68dSPeng Fan val = readl(info->base + input_reg); 136*745df68dSPeng Fan val &= ~mask; 137*745df68dSPeng Fan val |= select << shift; 138*745df68dSPeng Fan writel(val, info->base + input_reg); 139*745df68dSPeng Fan } else if (input_reg) { 140*745df68dSPeng Fan /* 141*745df68dSPeng Fan * Regular select input register can never be at offset 142*745df68dSPeng Fan * 0, and we only print register value for regular case. 143*745df68dSPeng Fan */ 144*745df68dSPeng Fan if (info->input_sel_base) 145*745df68dSPeng Fan writel(input_val, info->input_sel_base + 146*745df68dSPeng Fan input_reg); 147*745df68dSPeng Fan else 148*745df68dSPeng Fan writel(input_val, info->base + input_reg); 149*745df68dSPeng Fan 150*745df68dSPeng Fan dev_dbg(dev, "select_input: offset 0x%x val 0x%x\n", 151*745df68dSPeng Fan input_reg, input_val); 152*745df68dSPeng Fan } 153*745df68dSPeng Fan 154*745df68dSPeng Fan /* Set config */ 155*745df68dSPeng Fan if (!(config_val & IMX_NO_PAD_CTL)) { 156*745df68dSPeng Fan if (info->flags & SHARE_MUX_CONF_REG) { 157*745df68dSPeng Fan clrsetbits_le32(info->base + conf_reg, 0xffff, 158*745df68dSPeng Fan config_val); 159*745df68dSPeng Fan } else { 160*745df68dSPeng Fan writel(config_val, info->base + conf_reg); 161*745df68dSPeng Fan } 162*745df68dSPeng Fan 163*745df68dSPeng Fan dev_dbg(dev, "write config: offset 0x%x val 0x%x\n", 164*745df68dSPeng Fan conf_reg, config_val); 165*745df68dSPeng Fan } 166*745df68dSPeng Fan } 167*745df68dSPeng Fan 168*745df68dSPeng Fan return 0; 169*745df68dSPeng Fan } 170*745df68dSPeng Fan 171*745df68dSPeng Fan const struct pinctrl_ops imx_pinctrl_ops = { 172*745df68dSPeng Fan .set_state = imx_pinctrl_set_state, 173*745df68dSPeng Fan }; 174*745df68dSPeng Fan 175*745df68dSPeng Fan int imx_pinctrl_probe(struct udevice *dev, 176*745df68dSPeng Fan struct imx_pinctrl_soc_info *info) 177*745df68dSPeng Fan { 178*745df68dSPeng Fan struct imx_pinctrl_priv *priv = dev_get_priv(dev); 179*745df68dSPeng Fan int node = dev->of_offset, ret; 180*745df68dSPeng Fan struct fdtdec_phandle_args arg; 181*745df68dSPeng Fan fdt_addr_t addr; 182*745df68dSPeng Fan fdt_size_t size; 183*745df68dSPeng Fan 184*745df68dSPeng Fan if (!info) { 185*745df68dSPeng Fan dev_err(dev, "wrong pinctrl info\n"); 186*745df68dSPeng Fan return -EINVAL; 187*745df68dSPeng Fan } 188*745df68dSPeng Fan 189*745df68dSPeng Fan priv->dev = dev; 190*745df68dSPeng Fan priv->info = info; 191*745df68dSPeng Fan 192*745df68dSPeng Fan addr = fdtdec_get_addr_size(gd->fdt_blob, dev->of_offset, "reg", &size); 193*745df68dSPeng Fan 194*745df68dSPeng Fan if (addr == FDT_ADDR_T_NONE) 195*745df68dSPeng Fan return -EINVAL; 196*745df68dSPeng Fan 197*745df68dSPeng Fan info->base = map_sysmem(addr, size); 198*745df68dSPeng Fan if (!info->base) 199*745df68dSPeng Fan return -ENOMEM; 200*745df68dSPeng Fan priv->info = info; 201*745df68dSPeng Fan 202*745df68dSPeng Fan /* 203*745df68dSPeng Fan * Refer to linux documentation for details: 204*745df68dSPeng Fan * Documentation/devicetree/bindings/pinctrl/fsl,imx7d-pinctrl.txt 205*745df68dSPeng Fan */ 206*745df68dSPeng Fan if (fdtdec_get_bool(gd->fdt_blob, node, "fsl,input-sel")) { 207*745df68dSPeng Fan ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, 208*745df68dSPeng Fan node, "fsl,input-sel", 209*745df68dSPeng Fan NULL, 0, 0, &arg); 210*745df68dSPeng Fan if (ret) { 211*745df68dSPeng Fan dev_err(dev, "iomuxc fsl,input-sel property not found\n"); 212*745df68dSPeng Fan return -EINVAL; 213*745df68dSPeng Fan } 214*745df68dSPeng Fan 215*745df68dSPeng Fan addr = fdtdec_get_addr_size(gd->fdt_blob, arg.node, "reg", 216*745df68dSPeng Fan &size); 217*745df68dSPeng Fan if (addr == FDT_ADDR_T_NONE) 218*745df68dSPeng Fan return -EINVAL; 219*745df68dSPeng Fan 220*745df68dSPeng Fan info->input_sel_base = map_sysmem(addr, size); 221*745df68dSPeng Fan if (!info->input_sel_base) 222*745df68dSPeng Fan return -ENOMEM; 223*745df68dSPeng Fan } 224*745df68dSPeng Fan 225*745df68dSPeng Fan dev_info(dev, "initialized IMX pinctrl driver\n"); 226*745df68dSPeng Fan 227*745df68dSPeng Fan return 0; 228*745df68dSPeng Fan } 229*745df68dSPeng Fan 230*745df68dSPeng Fan int imx_pinctrl_remove(struct udevice *dev) 231*745df68dSPeng Fan { 232*745df68dSPeng Fan struct imx_pinctrl_priv *priv = dev_get_priv(dev); 233*745df68dSPeng Fan struct imx_pinctrl_soc_info *info = priv->info; 234*745df68dSPeng Fan 235*745df68dSPeng Fan if (info->input_sel_base) 236*745df68dSPeng Fan unmap_sysmem(info->input_sel_base); 237*745df68dSPeng Fan if (info->base) 238*745df68dSPeng Fan unmap_sysmem(info->base); 239*745df68dSPeng Fan 240*745df68dSPeng Fan return 0; 241*745df68dSPeng Fan } 242