xref: /openbmc/linux/arch/powerpc/sysdev/tsi108_dev.c (revision 2500763d)
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_address.h>
20 #include <linux/of_irq.h>
21 #include <linux/of_net.h>
22 #include <asm/tsi108.h>
23 
24 #include <linux/atomic.h>
25 #include <asm/io.h>
26 #include <asm/irq.h>
27 #include <mm/mmu_decl.h>
28 
29 #undef DEBUG
30 
31 #ifdef DEBUG
32 #define DBG(fmt...) do { printk(fmt); } while(0)
33 #else
34 #define DBG(fmt...) do { } while(0)
35 #endif
36 
37 static phys_addr_t tsi108_csr_base = -1;
38 
get_csrbase(void)39 phys_addr_t get_csrbase(void)
40 {
41 	struct device_node *tsi;
42 
43 	if (tsi108_csr_base != -1)
44 		return tsi108_csr_base;
45 
46 	tsi = of_find_node_by_type(NULL, "tsi-bridge");
47 	if (tsi) {
48 		struct resource res;
49 		of_address_to_resource(tsi, 0, &res);
50 		tsi108_csr_base = res.start;
51 		of_node_put(tsi);
52 	}
53 	return tsi108_csr_base;
54 }
55 EXPORT_SYMBOL(get_csrbase);
56 
get_vir_csrbase(void)57 u32 get_vir_csrbase(void)
58 {
59 	return (u32) (ioremap(get_csrbase(), 0x10000));
60 }
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_property_read_bool(phy, "txc-rxc-delay-disable"))
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