1 /* 2 * Copyright 2017 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <dm.h> 9 #include <errno.h> 10 #include <asm/io.h> 11 #include <asm/arch/pinctrl.h> 12 #include <asm/arch/scu_ast2500.h> 13 #include <dm/pinctrl.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 /* 18 * This driver works with very simple configuration that has the same name 19 * for group and function. This way it is compatible with the Linux Kernel 20 * driver. 21 */ 22 23 struct ast2500_pinctrl_priv { 24 struct ast2500_scu *scu; 25 }; 26 27 static int ast2500_pinctrl_probe(struct udevice *dev) 28 { 29 struct ast2500_pinctrl_priv *priv = dev_get_priv(dev); 30 31 priv->scu = ast_get_scu(); 32 33 return 0; 34 } 35 36 struct ast2500_group_config { 37 char *group_name; 38 /* Control register number (1-10) */ 39 unsigned reg_num; 40 /* The mask of control bits in the register */ 41 u32 ctrl_bit_mask; 42 }; 43 44 static const struct ast2500_group_config ast2500_groups[] = { 45 { "I2C1", 8, (1 << 13) | (1 << 12) }, 46 { "I2C2", 8, (1 << 15) | (1 << 14) }, 47 { "I2C3", 8, (1 << 16) }, 48 { "I2C4", 5, (1 << 17) }, 49 { "I2C4", 5, (1 << 17) }, 50 { "I2C5", 5, (1 << 18) }, 51 { "I2C6", 5, (1 << 19) }, 52 { "I2C7", 5, (1 << 20) }, 53 { "I2C8", 5, (1 << 21) }, 54 { "I2C9", 5, (1 << 22) }, 55 { "I2C10", 5, (1 << 23) }, 56 { "I2C11", 5, (1 << 24) }, 57 { "I2C12", 5, (1 << 25) }, 58 { "I2C13", 5, (1 << 26) }, 59 { "I2C14", 5, (1 << 27) }, 60 { "MAC1LINK", 1, (1 << 0) }, 61 { "MDIO1", 3, (1 << 31) | (1 << 30) }, 62 { "MAC2LINK", 1, (1 << 1) }, 63 { "MDIO2", 5, (1 << 2) }, 64 }; 65 66 static int ast2500_pinctrl_get_groups_count(struct udevice *dev) 67 { 68 debug("PINCTRL: get_(functions/groups)_count\n"); 69 70 return ARRAY_SIZE(ast2500_groups); 71 } 72 73 static const char *ast2500_pinctrl_get_group_name(struct udevice *dev, 74 unsigned selector) 75 { 76 debug("PINCTRL: get_(function/group)_name %u\n", selector); 77 78 return ast2500_groups[selector].group_name; 79 } 80 81 static int ast2500_pinctrl_group_set(struct udevice *dev, unsigned selector, 82 unsigned func_selector) 83 { 84 struct ast2500_pinctrl_priv *priv = dev_get_priv(dev); 85 const struct ast2500_group_config *config; 86 u32 *ctrl_reg; 87 88 debug("PINCTRL: group_set <%u, %u>\n", selector, func_selector); 89 if (selector >= ARRAY_SIZE(ast2500_groups)) 90 return -EINVAL; 91 92 config = &ast2500_groups[selector]; 93 if (config->reg_num > 6) 94 ctrl_reg = &priv->scu->pinmux_ctrl1[config->reg_num - 7]; 95 else 96 ctrl_reg = &priv->scu->pinmux_ctrl[config->reg_num - 1]; 97 98 ast_scu_unlock(priv->scu); 99 setbits_le32(ctrl_reg, config->ctrl_bit_mask); 100 ast_scu_lock(priv->scu); 101 102 return 0; 103 } 104 105 static struct pinctrl_ops ast2500_pinctrl_ops = { 106 .set_state = pinctrl_generic_set_state, 107 .get_groups_count = ast2500_pinctrl_get_groups_count, 108 .get_group_name = ast2500_pinctrl_get_group_name, 109 .get_functions_count = ast2500_pinctrl_get_groups_count, 110 .get_function_name = ast2500_pinctrl_get_group_name, 111 .pinmux_group_set = ast2500_pinctrl_group_set, 112 }; 113 114 static const struct udevice_id ast2500_pinctrl_ids[] = { 115 { .compatible = "aspeed,ast2500-pinctrl" }, 116 { .compatible = "aspeed,g5-pinctrl" }, 117 { } 118 }; 119 120 U_BOOT_DRIVER(pinctrl_ast2500) = { 121 .name = "aspeed_ast2500_pinctrl", 122 .id = UCLASS_PINCTRL, 123 .of_match = ast2500_pinctrl_ids, 124 .priv_auto_alloc_size = sizeof(struct ast2500_pinctrl_priv), 125 .ops = &ast2500_pinctrl_ops, 126 .probe = ast2500_pinctrl_probe, 127 }; 128