Merge git://git.infradead.org/mtd-2.6
[linux-2.6] / arch / powerpc / sysdev / tsi108_dev.c
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/module.h>
20 #include <linux/device.h>
21 #include <linux/platform_device.h>
22 #include <asm/tsi108.h>
23
24 #include <asm/system.h>
25 #include <asm/atomic.h>
26 #include <asm/io.h>
27 #include <asm/irq.h>
28 #include <asm/prom.h>
29 #include <mm/mmu_decl.h>
30
31 #undef DEBUG
32
33 #ifdef DEBUG
34 #define DBG(fmt...) do { printk(fmt); } while(0)
35 #else
36 #define DBG(fmt...) do { } while(0)
37 #endif
38
39 static phys_addr_t tsi108_csr_base = -1;
40
41 phys_addr_t get_csrbase(void)
42 {
43         struct device_node *tsi;
44
45         if (tsi108_csr_base != -1)
46                 return tsi108_csr_base;
47
48         tsi = of_find_node_by_type(NULL, "tsi-bridge");
49         if (tsi) {
50                 unsigned int size;
51                 const void *prop = of_get_property(tsi, "reg", &size);
52                 tsi108_csr_base = of_translate_address(tsi, prop);
53                 of_node_put(tsi);
54         };
55         return tsi108_csr_base;
56 }
57
58 u32 get_vir_csrbase(void)
59 {
60         return (u32) (ioremap(get_csrbase(), 0x10000));
61 }
62
63 EXPORT_SYMBOL(get_csrbase);
64 EXPORT_SYMBOL(get_vir_csrbase);
65
66 static int __init tsi108_eth_of_init(void)
67 {
68         struct device_node *np;
69         unsigned int i;
70         struct platform_device *tsi_eth_dev;
71         struct resource res;
72         int ret;
73
74         for (np = NULL, i = 0;
75              (np = of_find_compatible_node(np, "network", "tsi108-ethernet")) != NULL;
76              i++) {
77                 struct resource r[2];
78                 struct device_node *phy, *mdio;
79                 hw_info tsi_eth_data;
80                 const unsigned int *phy_id;
81                 const void *mac_addr;
82                 const phandle *ph;
83
84                 memset(r, 0, sizeof(r));
85                 memset(&tsi_eth_data, 0, sizeof(tsi_eth_data));
86
87                 ret = of_address_to_resource(np, 0, &r[0]);
88                 DBG("%s: name:start->end = %s:0x%lx-> 0x%lx\n",
89                         __FUNCTION__,r[0].name, r[0].start, r[0].end);
90                 if (ret)
91                         goto err;
92
93                 r[1].name = "tx";
94                 r[1].start = irq_of_parse_and_map(np, 0);
95                 r[1].end = irq_of_parse_and_map(np, 0);
96                 r[1].flags = IORESOURCE_IRQ;
97                 DBG("%s: name:start->end = %s:0x%lx-> 0x%lx\n",
98                         __FUNCTION__,r[1].name, r[1].start, r[1].end);
99
100                 tsi_eth_dev =
101                     platform_device_register_simple("tsi-ethernet", i, &r[0],
102                                                     1);
103
104                 if (IS_ERR(tsi_eth_dev)) {
105                         ret = PTR_ERR(tsi_eth_dev);
106                         goto err;
107                 }
108
109                 mac_addr = of_get_mac_address(np);
110                 if (mac_addr)
111                         memcpy(tsi_eth_data.mac_addr, mac_addr, 6);
112
113                 ph = of_get_property(np, "mdio-handle", NULL);
114                 mdio = of_find_node_by_phandle(*ph);
115                 ret = of_address_to_resource(mdio, 0, &res);
116                 of_node_put(mdio);
117                 if (ret)
118                         goto unreg;
119
120                 ph = of_get_property(np, "phy-handle", NULL);
121                 phy = of_find_node_by_phandle(*ph);
122
123                 if (phy == NULL) {
124                         ret = -ENODEV;
125                         goto unreg;
126                 }
127
128                 phy_id = of_get_property(phy, "reg", NULL);
129
130                 tsi_eth_data.regs = r[0].start;
131                 tsi_eth_data.phyregs = res.start;
132                 tsi_eth_data.phy = *phy_id;
133                 tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);
134
135                 /* Some boards with the TSI108 bridge (e.g. Holly)
136                  * have a miswiring of the ethernet PHYs which
137                  * requires a workaround.  The special
138                  * "txc-rxc-delay-disable" property enables this
139                  * workaround.  FIXME: Need to port the tsi108_eth
140                  * driver itself to phylib and use a non-misleading
141                  * name for the workaround flag - it's not actually to
142                  * do with the model of PHY in use */
143                 if (of_get_property(phy, "txc-rxc-delay-disable", NULL))
144                         tsi_eth_data.phy_type = TSI108_PHY_BCM54XX;
145                 of_node_put(phy);
146
147                 ret =
148                     platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
149                                              sizeof(hw_info));
150                 if (ret)
151                         goto unreg;
152         }
153         return 0;
154 unreg:
155         platform_device_unregister(tsi_eth_dev);
156 err:
157         return ret;
158 }
159
160 arch_initcall(tsi108_eth_of_init);