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
get_csrbase(void)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
get_vir_csrbase(void)55 u32 get_vir_csrbase(void)
56 {
57 return (u32) (ioremap(get_csrbase(), 0x10000));
58 }
59
60 EXPORT_SYMBOL(get_csrbase);
61 EXPORT_SYMBOL(get_vir_csrbase);
62
tsi108_eth_of_init(void)63 static int __init tsi108_eth_of_init(void)
64 {
65 struct device_node *np;
66 unsigned int i = 0;
67 struct platform_device *tsi_eth_dev;
68 struct resource res;
69 int ret;
70
71 for_each_compatible_node(np, "network", "tsi108-ethernet") {
72 struct resource r[2];
73 struct device_node *phy, *mdio;
74 hw_info tsi_eth_data;
75 const unsigned int *phy_id;
76 const phandle *ph;
77
78 memset(r, 0, sizeof(r));
79 memset(&tsi_eth_data, 0, sizeof(tsi_eth_data));
80
81 ret = of_address_to_resource(np, 0, &r[0]);
82 DBG("%s: name:start->end = %s:%pR\n",
83 __func__, r[0].name, &r[0]);
84 if (ret)
85 goto err;
86
87 r[1].name = "tx";
88 r[1].start = irq_of_parse_and_map(np, 0);
89 r[1].end = irq_of_parse_and_map(np, 0);
90 r[1].flags = IORESOURCE_IRQ;
91 DBG("%s: name:start->end = %s:%pR\n",
92 __func__, r[1].name, &r[1]);
93
94 tsi_eth_dev =
95 platform_device_register_simple("tsi-ethernet", i++, &r[0],
96 1);
97
98 if (IS_ERR(tsi_eth_dev)) {
99 ret = PTR_ERR(tsi_eth_dev);
100 goto err;
101 }
102
103 of_get_mac_address(np, tsi_eth_data.mac_addr);
104
105 ph = of_get_property(np, "mdio-handle", NULL);
106 mdio = of_find_node_by_phandle(*ph);
107 ret = of_address_to_resource(mdio, 0, &res);
108 of_node_put(mdio);
109 if (ret)
110 goto unreg;
111
112 ph = of_get_property(np, "phy-handle", NULL);
113 phy = of_find_node_by_phandle(*ph);
114
115 if (phy == NULL) {
116 ret = -ENODEV;
117 goto unreg;
118 }
119
120 phy_id = of_get_property(phy, "reg", NULL);
121
122 tsi_eth_data.regs = r[0].start;
123 tsi_eth_data.phyregs = res.start;
124 tsi_eth_data.phy = *phy_id;
125 tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);
126
127 /* Some boards with the TSI108 bridge (e.g. Holly)
128 * have a miswiring of the ethernet PHYs which
129 * requires a workaround. The special
130 * "txc-rxc-delay-disable" property enables this
131 * workaround. FIXME: Need to port the tsi108_eth
132 * driver itself to phylib and use a non-misleading
133 * name for the workaround flag - it's not actually to
134 * do with the model of PHY in use */
135 if (of_get_property(phy, "txc-rxc-delay-disable", NULL))
136 tsi_eth_data.phy_type = TSI108_PHY_BCM54XX;
137 of_node_put(phy);
138
139 ret =
140 platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
141 sizeof(hw_info));
142 if (ret)
143 goto unreg;
144 }
145 return 0;
146 unreg:
147 platform_device_unregister(tsi_eth_dev);
148 err:
149 of_node_put(np);
150 return ret;
151 }
152
153 arch_initcall(tsi108_eth_of_init);
154