1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright © 2014 NVIDIA Corporation 4 * Copyright © 2015 Broadcom Corporation 5 */ 6 7 #include <linux/io.h> 8 #include <linux/of.h> 9 #include <linux/of_address.h> 10 #include <linux/slab.h> 11 #include <linux/soc/brcmstb/brcmstb.h> 12 #include <linux/sys_soc.h> 13 14 struct brcmstb_soc_info { 15 u32 family_id; 16 u32 product_id; 17 }; 18 19 static struct brcmstb_soc_info *soc_info; 20 21 u32 brcmstb_get_family_id(void) 22 { 23 return soc_info ? soc_info->family_id : 0; 24 } 25 EXPORT_SYMBOL(brcmstb_get_family_id); 26 27 u32 brcmstb_get_product_id(void) 28 { 29 return soc_info ? soc_info->product_id : 0; 30 } 31 EXPORT_SYMBOL(brcmstb_get_product_id); 32 33 static const struct of_device_id sun_top_ctrl_match[] = { 34 { .compatible = "brcm,bcm7125-sun-top-ctrl", }, 35 { .compatible = "brcm,bcm7346-sun-top-ctrl", }, 36 { .compatible = "brcm,bcm7358-sun-top-ctrl", }, 37 { .compatible = "brcm,bcm7360-sun-top-ctrl", }, 38 { .compatible = "brcm,bcm7362-sun-top-ctrl", }, 39 { .compatible = "brcm,bcm7420-sun-top-ctrl", }, 40 { .compatible = "brcm,bcm7425-sun-top-ctrl", }, 41 { .compatible = "brcm,bcm7429-sun-top-ctrl", }, 42 { .compatible = "brcm,bcm7435-sun-top-ctrl", }, 43 { .compatible = "brcm,brcmstb-sun-top-ctrl", }, 44 { } 45 }; 46 47 static int __init brcmstb_soc_device_init(void) 48 { 49 struct soc_device_attribute *soc_dev_attr; 50 struct device_node *sun_top_ctrl; 51 void __iomem *sun_top_ctrl_base; 52 struct soc_device *soc_dev; 53 int ret = 0; 54 55 /* We could be on a multi-platform kernel, don't make this fatal but 56 * bail out early 57 */ 58 sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match); 59 if (!sun_top_ctrl) 60 return 0; 61 62 sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0); 63 if (!sun_top_ctrl_base) { 64 ret = -ENODEV; 65 goto out_put_node; 66 } 67 68 soc_info = kzalloc(sizeof(*soc_info), GFP_KERNEL); 69 if (!soc_info) { 70 ret = -ENOMEM; 71 goto out_unmap; 72 } 73 74 soc_info->family_id = readl(sun_top_ctrl_base); 75 soc_info->product_id = readl(sun_top_ctrl_base + 0x4); 76 77 soc_dev_attr = kzalloc_obj(*soc_dev_attr); 78 if (!soc_dev_attr) { 79 ret = -ENOMEM; 80 goto out_free_info; 81 } 82 83 soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x", 84 soc_info->family_id >> 28 ? 85 soc_info->family_id >> 16 : soc_info->family_id >> 8); 86 soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x", 87 soc_info->product_id >> 28 ? 88 soc_info->product_id >> 16 : soc_info->product_id >> 8); 89 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d", 90 ((soc_info->product_id & 0xf0) >> 4) + 'A', 91 soc_info->product_id & 0xf); 92 93 soc_dev = soc_device_register(soc_dev_attr); 94 if (IS_ERR(soc_dev)) { 95 ret = PTR_ERR(soc_dev); 96 goto out_free_attr; 97 } 98 99 iounmap(sun_top_ctrl_base); 100 of_node_put(sun_top_ctrl); 101 return 0; 102 103 out_free_attr: 104 kfree(soc_dev_attr->revision); 105 kfree(soc_dev_attr->soc_id); 106 kfree(soc_dev_attr->family); 107 kfree(soc_dev_attr); 108 out_free_info: 109 kfree(soc_info); 110 soc_info = NULL; 111 out_unmap: 112 iounmap(sun_top_ctrl_base); 113 out_put_node: 114 of_node_put(sun_top_ctrl); 115 return ret; 116 } 117 early_initcall(brcmstb_soc_device_init); 118