xref: /openbmc/linux/arch/powerpc/sysdev/tsi108_dev.c (revision 4a075bd4)
1 /*
2  * tsi108/109 device setup code
3  *
4  * Maintained by Roy Zang < tie-fei.zang@freescale.com >
5  *
6  * This program is free software; you can redistribute  it and/or modify it
7  * under  the terms of  the GNU General  Public License as published by the
8  * Free Software Foundation;  either version 2 of the  License, or (at your
9  * option) any later version.
10  */
11 
12 #include <linux/stddef.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/errno.h>
16 #include <linux/major.h>
17 #include <linux/delay.h>
18 #include <linux/irq.h>
19 #include <linux/export.h>
20 #include <linux/device.h>
21 #include <linux/etherdevice.h>
22 #include <linux/platform_device.h>
23 #include <linux/of_net.h>
24 #include <asm/tsi108.h>
25 
26 #include <linux/atomic.h>
27 #include <asm/io.h>
28 #include <asm/irq.h>
29 #include <asm/prom.h>
30 #include <mm/mmu_decl.h>
31 
32 #undef DEBUG
33 
34 #ifdef DEBUG
35 #define DBG(fmt...) do { printk(fmt); } while(0)
36 #else
37 #define DBG(fmt...) do { } while(0)
38 #endif
39 
40 static phys_addr_t tsi108_csr_base = -1;
41 
42 phys_addr_t get_csrbase(void)
43 {
44 	struct device_node *tsi;
45 
46 	if (tsi108_csr_base != -1)
47 		return tsi108_csr_base;
48 
49 	tsi = of_find_node_by_type(NULL, "tsi-bridge");
50 	if (tsi) {
51 		unsigned int size;
52 		const void *prop = of_get_property(tsi, "reg", &size);
53 		tsi108_csr_base = of_translate_address(tsi, prop);
54 		of_node_put(tsi);
55 	}
56 	return tsi108_csr_base;
57 }
58 
59 u32 get_vir_csrbase(void)
60 {
61 	return (u32) (ioremap(get_csrbase(), 0x10000));
62 }
63 
64 EXPORT_SYMBOL(get_csrbase);
65 EXPORT_SYMBOL(get_vir_csrbase);
66 
67 static int __init tsi108_eth_of_init(void)
68 {
69 	struct device_node *np;
70 	unsigned int i = 0;
71 	struct platform_device *tsi_eth_dev;
72 	struct resource res;
73 	int ret;
74 
75 	for_each_compatible_node(np, "network", "tsi108-ethernet") {
76 		struct resource r[2];
77 		struct device_node *phy, *mdio;
78 		hw_info tsi_eth_data;
79 		const unsigned int *phy_id;
80 		const void *mac_addr;
81 		const phandle *ph;
82 
83 		memset(r, 0, sizeof(r));
84 		memset(&tsi_eth_data, 0, sizeof(tsi_eth_data));
85 
86 		ret = of_address_to_resource(np, 0, &r[0]);
87 		DBG("%s: name:start->end = %s:%pR\n",
88 		    __func__, r[0].name, &r[0]);
89 		if (ret)
90 			goto err;
91 
92 		r[1].name = "tx";
93 		r[1].start = irq_of_parse_and_map(np, 0);
94 		r[1].end = irq_of_parse_and_map(np, 0);
95 		r[1].flags = IORESOURCE_IRQ;
96 		DBG("%s: name:start->end = %s:%pR\n",
97 			__func__, r[1].name, &r[1]);
98 
99 		tsi_eth_dev =
100 		    platform_device_register_simple("tsi-ethernet", i++, &r[0],
101 						    1);
102 
103 		if (IS_ERR(tsi_eth_dev)) {
104 			ret = PTR_ERR(tsi_eth_dev);
105 			goto err;
106 		}
107 
108 		mac_addr = of_get_mac_address(np);
109 		if (!IS_ERR(mac_addr))
110 			ether_addr_copy(tsi_eth_data.mac_addr, mac_addr);
111 
112 		ph = of_get_property(np, "mdio-handle", NULL);
113 		mdio = of_find_node_by_phandle(*ph);
114 		ret = of_address_to_resource(mdio, 0, &res);
115 		of_node_put(mdio);
116 		if (ret)
117 			goto unreg;
118 
119 		ph = of_get_property(np, "phy-handle", NULL);
120 		phy = of_find_node_by_phandle(*ph);
121 
122 		if (phy == NULL) {
123 			ret = -ENODEV;
124 			goto unreg;
125 		}
126 
127 		phy_id = of_get_property(phy, "reg", NULL);
128 
129 		tsi_eth_data.regs = r[0].start;
130 		tsi_eth_data.phyregs = res.start;
131 		tsi_eth_data.phy = *phy_id;
132 		tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);
133 
134 		/* Some boards with the TSI108 bridge (e.g. Holly)
135 		 * have a miswiring of the ethernet PHYs which
136 		 * requires a workaround.  The special
137 		 * "txc-rxc-delay-disable" property enables this
138 		 * workaround.  FIXME: Need to port the tsi108_eth
139 		 * driver itself to phylib and use a non-misleading
140 		 * name for the workaround flag - it's not actually to
141 		 * do with the model of PHY in use */
142 		if (of_get_property(phy, "txc-rxc-delay-disable", NULL))
143 			tsi_eth_data.phy_type = TSI108_PHY_BCM54XX;
144 		of_node_put(phy);
145 
146 		ret =
147 		    platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
148 					     sizeof(hw_info));
149 		if (ret)
150 			goto unreg;
151 	}
152 	return 0;
153 unreg:
154 	platform_device_unregister(tsi_eth_dev);
155 err:
156 	of_node_put(np);
157 	return ret;
158 }
159 
160 arch_initcall(tsi108_eth_of_init);
161