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
36static phys_addr_t tsi108_csr_base = -1;
37
38phys_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
55u32 get_vir_csrbase(void)
56{
57	return (u32) (ioremap(get_csrbase(), 0x10000));
58}
59
60EXPORT_SYMBOL(get_csrbase);
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 void *mac_addr;
77		const phandle *ph;
78
79		memset(r, 0, sizeof(r));
80		memset(&tsi_eth_data, 0, sizeof(tsi_eth_data));
81
82		ret = of_address_to_resource(np, 0, &r[0]);
83		DBG("%s: name:start->end = %s:%pR\n",
84		    __func__, r[0].name, &r[0]);
85		if (ret)
86			goto err;
87
88		r[1].name = "tx";
89		r[1].start = irq_of_parse_and_map(np, 0);
90		r[1].end = irq_of_parse_and_map(np, 0);
91		r[1].flags = IORESOURCE_IRQ;
92		DBG("%s: name:start->end = %s:%pR\n",
93			__func__, r[1].name, &r[1]);
94
95		tsi_eth_dev =
96		    platform_device_register_simple("tsi-ethernet", i++, &r[0],
97						    1);
98
99		if (IS_ERR(tsi_eth_dev)) {
100			ret = PTR_ERR(tsi_eth_dev);
101			goto err;
102		}
103
104		mac_addr = of_get_mac_address(np);
105		if (!IS_ERR(mac_addr))
106			ether_addr_copy(tsi_eth_data.mac_addr, mac_addr);
107
108		ph = of_get_property(np, "mdio-handle", NULL);
109		mdio = of_find_node_by_phandle(*ph);
110		ret = of_address_to_resource(mdio, 0, &res);
111		of_node_put(mdio);
112		if (ret)
113			goto unreg;
114
115		ph = of_get_property(np, "phy-handle", NULL);
116		phy = of_find_node_by_phandle(*ph);
117
118		if (phy == NULL) {
119			ret = -ENODEV;
120			goto unreg;
121		}
122
123		phy_id = of_get_property(phy, "reg", NULL);
124
125		tsi_eth_data.regs = r[0].start;
126		tsi_eth_data.phyregs = res.start;
127		tsi_eth_data.phy = *phy_id;
128		tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);
129
130		/* Some boards with the TSI108 bridge (e.g. Holly)
131		 * have a miswiring of the ethernet PHYs which
132		 * requires a workaround.  The special
133		 * "txc-rxc-delay-disable" property enables this
134		 * workaround.  FIXME: Need to port the tsi108_eth
135		 * driver itself to phylib and use a non-misleading
136		 * name for the workaround flag - it's not actually to
137		 * do with the model of PHY in use */
138		if (of_get_property(phy, "txc-rxc-delay-disable", NULL))
139			tsi_eth_data.phy_type = TSI108_PHY_BCM54XX;
140		of_node_put(phy);
141
142		ret =
143		    platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
144					     sizeof(hw_info));
145		if (ret)
146			goto unreg;
147	}
148	return 0;
149unreg:
150	platform_device_unregister(tsi_eth_dev);
151err:
152	of_node_put(np);
153	return ret;
154}
155
156arch_initcall(tsi108_eth_of_init);
157