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
37static phys_addr_t tsi108_csr_base = -1;
38
39phys_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}
55EXPORT_SYMBOL(get_csrbase);
56
57u32 get_vir_csrbase(void)
58{
59	return (u32) (ioremap(get_csrbase(), 0x10000));
60}
61EXPORT_SYMBOL(get_vir_csrbase);
62
63static 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;
146unreg:
147	platform_device_unregister(tsi_eth_dev);
148err:
149	of_node_put(np);
150	return ret;
151}
152
153arch_initcall(tsi108_eth_of_init);
154