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