tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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}
54EXPORT_SYMBOL(get_csrbase);
55
56u32 get_vir_csrbase(void)
57{
58 return (u32) (ioremap(get_csrbase(), 0x10000));
59}
60EXPORT_SYMBOL(get_vir_csrbase);
61
62static int __init tsi108_eth_of_init(void)
63{
64 struct device_node *np;
65 unsigned int i = 0;
66 struct platform_device *tsi_eth_dev;
67 struct resource res;
68 int ret;
69
70 for_each_compatible_node(np, "network", "tsi108-ethernet") {
71 struct resource r[2];
72 struct device_node *phy, *mdio;
73 hw_info tsi_eth_data;
74 const unsigned int *phy_id;
75 const phandle *ph;
76
77 memset(r, 0, sizeof(r));
78 memset(&tsi_eth_data, 0, sizeof(tsi_eth_data));
79
80 ret = of_address_to_resource(np, 0, &r[0]);
81 DBG("%s: name:start->end = %s:%pR\n",
82 __func__, r[0].name, &r[0]);
83 if (ret)
84 goto err;
85
86 r[1].name = "tx";
87 r[1].start = irq_of_parse_and_map(np, 0);
88 r[1].end = irq_of_parse_and_map(np, 0);
89 r[1].flags = IORESOURCE_IRQ;
90 DBG("%s: name:start->end = %s:%pR\n",
91 __func__, r[1].name, &r[1]);
92
93 tsi_eth_dev =
94 platform_device_register_simple("tsi-ethernet", i++, &r[0],
95 1);
96
97 if (IS_ERR(tsi_eth_dev)) {
98 ret = PTR_ERR(tsi_eth_dev);
99 goto err;
100 }
101
102 of_get_mac_address(np, tsi_eth_data.mac_addr);
103
104 ph = of_get_property(np, "mdio-handle", NULL);
105 mdio = of_find_node_by_phandle(*ph);
106 ret = of_address_to_resource(mdio, 0, &res);
107 of_node_put(mdio);
108 if (ret)
109 goto unreg;
110
111 ph = of_get_property(np, "phy-handle", NULL);
112 phy = of_find_node_by_phandle(*ph);
113
114 if (phy == NULL) {
115 ret = -ENODEV;
116 goto unreg;
117 }
118
119 phy_id = of_get_property(phy, "reg", NULL);
120
121 tsi_eth_data.regs = r[0].start;
122 tsi_eth_data.phyregs = res.start;
123 tsi_eth_data.phy = *phy_id;
124 tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);
125
126 /* Some boards with the TSI108 bridge (e.g. Holly)
127 * have a miswiring of the ethernet PHYs which
128 * requires a workaround. The special
129 * "txc-rxc-delay-disable" property enables this
130 * workaround. FIXME: Need to port the tsi108_eth
131 * driver itself to phylib and use a non-misleading
132 * name for the workaround flag - it's not actually to
133 * do with the model of PHY in use */
134 if (of_get_property(phy, "txc-rxc-delay-disable", NULL))
135 tsi_eth_data.phy_type = TSI108_PHY_BCM54XX;
136 of_node_put(phy);
137
138 ret =
139 platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
140 sizeof(hw_info));
141 if (ret)
142 goto unreg;
143 }
144 return 0;
145unreg:
146 platform_device_unregister(tsi_eth_dev);
147err:
148 of_node_put(np);
149 return ret;
150}
151
152arch_initcall(tsi108_eth_of_init);