1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * tsi108/109 device setup code 4 * 5 * Maintained by Roy Zang < tie-fei.zang@freescale.com > 6 */ 7 8 #include <linux/stddef.h> 9 #include <linux/kernel.h> 10 #include <linux/init.h> 11 #include <linux/errno.h> 12 #include <linux/major.h> 13 #include <linux/delay.h> 14 #include <linux/irq.h> 15 #include <linux/export.h> 16 #include <linux/device.h> 17 #include <linux/etherdevice.h> 18 #include <linux/platform_device.h> 19 #include <linux/of_net.h> 20 #include <asm/tsi108.h> 21 22 #include <linux/atomic.h> 23 #include <asm/io.h> 24 #include <asm/irq.h> 25 #include <asm/prom.h> 26 #include <mm/mmu_decl.h> 27 28 #undef DEBUG 29 30 #ifdef DEBUG 31 #define DBG(fmt...) do { printk(fmt); } while(0) 32 #else 33 #define DBG(fmt...) do { } while(0) 34 #endif 35 36 static phys_addr_t tsi108_csr_base = -1; 37 38 phys_addr_t get_csrbase(void) 39 { 40 struct device_node *tsi; 41 42 if (tsi108_csr_base != -1) 43 return tsi108_csr_base; 44 45 tsi = of_find_node_by_type(NULL, "tsi-bridge"); 46 if (tsi) { 47 unsigned int size; 48 const void *prop = of_get_property(tsi, "reg", &size); 49 tsi108_csr_base = of_translate_address(tsi, prop); 50 of_node_put(tsi); 51 } 52 return tsi108_csr_base; 53 } 54 EXPORT_SYMBOL(get_csrbase); 55 56 u32 get_vir_csrbase(void) 57 { 58 return (u32) (ioremap(get_csrbase(), 0x10000)); 59 } 60 EXPORT_SYMBOL(get_vir_csrbase); 61 62 static int __init tsi108_eth_of_init(void) 63 { 64 struct device_node *np; 65 unsigned int i = 0; 66 struct platform_device *tsi_eth_dev; 67 struct resource res; 68 int ret; 69 70 for_each_compatible_node(np, "network", "tsi108-ethernet") { 71 struct resource r[2]; 72 struct device_node *phy, *mdio; 73 hw_info tsi_eth_data; 74 const unsigned int *phy_id; 75 const phandle *ph; 76 77 memset(r, 0, sizeof(r)); 78 memset(&tsi_eth_data, 0, sizeof(tsi_eth_data)); 79 80 ret = of_address_to_resource(np, 0, &r[0]); 81 DBG("%s: name:start->end = %s:%pR\n", 82 __func__, r[0].name, &r[0]); 83 if (ret) 84 goto err; 85 86 r[1].name = "tx"; 87 r[1].start = irq_of_parse_and_map(np, 0); 88 r[1].end = irq_of_parse_and_map(np, 0); 89 r[1].flags = IORESOURCE_IRQ; 90 DBG("%s: name:start->end = %s:%pR\n", 91 __func__, r[1].name, &r[1]); 92 93 tsi_eth_dev = 94 platform_device_register_simple("tsi-ethernet", i++, &r[0], 95 1); 96 97 if (IS_ERR(tsi_eth_dev)) { 98 ret = PTR_ERR(tsi_eth_dev); 99 goto err; 100 } 101 102 of_get_mac_address(np, tsi_eth_data.mac_addr); 103 104 ph = of_get_property(np, "mdio-handle", NULL); 105 mdio = of_find_node_by_phandle(*ph); 106 ret = of_address_to_resource(mdio, 0, &res); 107 of_node_put(mdio); 108 if (ret) 109 goto unreg; 110 111 ph = of_get_property(np, "phy-handle", NULL); 112 phy = of_find_node_by_phandle(*ph); 113 114 if (phy == NULL) { 115 ret = -ENODEV; 116 goto unreg; 117 } 118 119 phy_id = of_get_property(phy, "reg", NULL); 120 121 tsi_eth_data.regs = r[0].start; 122 tsi_eth_data.phyregs = res.start; 123 tsi_eth_data.phy = *phy_id; 124 tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0); 125 126 /* Some boards with the TSI108 bridge (e.g. Holly) 127 * have a miswiring of the ethernet PHYs which 128 * requires a workaround. The special 129 * "txc-rxc-delay-disable" property enables this 130 * workaround. FIXME: Need to port the tsi108_eth 131 * driver itself to phylib and use a non-misleading 132 * name for the workaround flag - it's not actually to 133 * do with the model of PHY in use */ 134 if (of_get_property(phy, "txc-rxc-delay-disable", NULL)) 135 tsi_eth_data.phy_type = TSI108_PHY_BCM54XX; 136 of_node_put(phy); 137 138 ret = 139 platform_device_add_data(tsi_eth_dev, &tsi_eth_data, 140 sizeof(hw_info)); 141 if (ret) 142 goto unreg; 143 } 144 return 0; 145 unreg: 146 platform_device_unregister(tsi_eth_dev); 147 err: 148 of_node_put(np); 149 return ret; 150 } 151 152 arch_initcall(tsi108_eth_of_init); 153