1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2017 Google, Inc 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <errno.h> 9 #include <asm/io.h> 10 #include <asm/arch/pinctrl.h> 11 #include <asm/arch/scu_ast2500.h> 12 #include <dm/pinctrl.h> 13 14 /* 15 * This driver works with very simple configuration that has the same name 16 * for group and function. This way it is compatible with the Linux Kernel 17 * driver. 18 */ 19 20 struct ast2500_pinctrl_priv { 21 struct ast2500_scu *scu; 22 }; 23 24 static int ast2500_pinctrl_probe(struct udevice *dev) 25 { 26 struct ast2500_pinctrl_priv *priv = dev_get_priv(dev); 27 28 priv->scu = ast_get_scu(); 29 30 return 0; 31 } 32 33 struct ast2500_group_config { 34 char *group_name; 35 /* Control register number (1-10) */ 36 unsigned reg_num; 37 /* The mask of control bits in the register */ 38 u32 ctrl_bit_mask; 39 }; 40 41 static const struct ast2500_group_config ast2500_groups[] = { 42 { "I2C1", 8, (1 << 13) | (1 << 12) }, 43 { "I2C2", 8, (1 << 15) | (1 << 14) }, 44 { "I2C3", 8, (1 << 16) }, 45 { "I2C4", 5, (1 << 17) }, 46 { "I2C4", 5, (1 << 17) }, 47 { "I2C5", 5, (1 << 18) }, 48 { "I2C6", 5, (1 << 19) }, 49 { "I2C7", 5, (1 << 20) }, 50 { "I2C8", 5, (1 << 21) }, 51 { "I2C9", 5, (1 << 22) }, 52 { "I2C10", 5, (1 << 23) }, 53 { "I2C11", 5, (1 << 24) }, 54 { "I2C12", 5, (1 << 25) }, 55 { "I2C13", 5, (1 << 26) }, 56 { "I2C14", 5, (1 << 27) }, 57 { "MAC1LINK", 1, (1 << 0) }, 58 { "MDIO1", 3, (1 << 31) | (1 << 30) }, 59 { "MAC2LINK", 1, (1 << 1) }, 60 { "MDIO2", 5, (1 << 2) }, 61 }; 62 63 static int ast2500_pinctrl_get_groups_count(struct udevice *dev) 64 { 65 debug("PINCTRL: get_(functions/groups)_count\n"); 66 67 return ARRAY_SIZE(ast2500_groups); 68 } 69 70 static const char *ast2500_pinctrl_get_group_name(struct udevice *dev, 71 unsigned selector) 72 { 73 debug("PINCTRL: get_(function/group)_name %u\n", selector); 74 75 return ast2500_groups[selector].group_name; 76 } 77 78 static int ast2500_pinctrl_group_set(struct udevice *dev, unsigned selector, 79 unsigned func_selector) 80 { 81 struct ast2500_pinctrl_priv *priv = dev_get_priv(dev); 82 const struct ast2500_group_config *config; 83 u32 *ctrl_reg; 84 85 debug("PINCTRL: group_set <%u, %u>\n", selector, func_selector); 86 if (selector >= ARRAY_SIZE(ast2500_groups)) 87 return -EINVAL; 88 89 config = &ast2500_groups[selector]; 90 if (config->reg_num > 6) 91 ctrl_reg = &priv->scu->pinmux_ctrl1[config->reg_num - 7]; 92 else 93 ctrl_reg = &priv->scu->pinmux_ctrl[config->reg_num - 1]; 94 95 ast_scu_unlock(priv->scu); 96 setbits_le32(ctrl_reg, config->ctrl_bit_mask); 97 ast_scu_lock(priv->scu); 98 99 return 0; 100 } 101 102 static struct pinctrl_ops ast2500_pinctrl_ops = { 103 .set_state = pinctrl_generic_set_state, 104 .get_groups_count = ast2500_pinctrl_get_groups_count, 105 .get_group_name = ast2500_pinctrl_get_group_name, 106 .get_functions_count = ast2500_pinctrl_get_groups_count, 107 .get_function_name = ast2500_pinctrl_get_group_name, 108 .pinmux_group_set = ast2500_pinctrl_group_set, 109 }; 110 111 static const struct udevice_id ast2500_pinctrl_ids[] = { 112 { .compatible = "aspeed,ast2500-pinctrl" }, 113 { .compatible = "aspeed,g5-pinctrl" }, 114 { } 115 }; 116 117 U_BOOT_DRIVER(pinctrl_ast2500) = { 118 .name = "aspeed_ast2500_pinctrl", 119 .id = UCLASS_PINCTRL, 120 .of_match = ast2500_pinctrl_ids, 121 .priv_auto_alloc_size = sizeof(struct ast2500_pinctrl_priv), 122 .ops = &ast2500_pinctrl_ops, 123 .probe = ast2500_pinctrl_probe, 124 }; 125
