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5b4b8454 VB |
1 | /* |
2 | * Combined Ethernet driver for Motorola MPC8xx and MPC82xx. | |
3 | * | |
4 | * Copyright (c) 2003 Intracom S.A. | |
5 | * by Pantelis Antoniou <panto@intracom.gr> | |
6 | * | |
7 | * 2005 (c) MontaVista Software, Inc. | |
8 | * Vitaly Bordug <vbordug@ru.mvista.com> | |
9 | * | |
10 | * This file is licensed under the terms of the GNU General Public License | |
11 | * version 2. This program is licensed "as is" without any warranty of any | |
12 | * kind, whether express or implied. | |
13 | */ | |
14 | ||
15 | ||
16 | #include <linux/config.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/types.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/sched.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/ptrace.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/ioport.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/etherdevice.h> | |
32 | #include <linux/skbuff.h> | |
33 | #include <linux/spinlock.h> | |
34 | #include <linux/mii.h> | |
35 | #include <linux/ethtool.h> | |
36 | #include <linux/bitops.h> | |
37 | #include <linux/platform_device.h> | |
38 | ||
39 | #include <asm/pgtable.h> | |
40 | #include <asm/irq.h> | |
41 | #include <asm/uaccess.h> | |
42 | ||
43 | #include "fs_enet.h" | |
44 | #include "fec.h" | |
45 | ||
46 | /* Make MII read/write commands for the FEC. | |
47 | */ | |
48 | #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18)) | |
49 | #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff)) | |
50 | #define mk_mii_end 0 | |
51 | ||
52 | #define FEC_MII_LOOPS 10000 | |
53 | ||
54 | static int match_has_phy (struct device *dev, void* data) | |
55 | { | |
56 | struct platform_device* pdev = container_of(dev, struct platform_device, dev); | |
57 | struct fs_platform_info* fpi; | |
58 | if(strcmp(pdev->name, (char*)data)) | |
59 | { | |
60 | return 0; | |
61 | } | |
62 | ||
63 | fpi = pdev->dev.platform_data; | |
64 | if((fpi)&&(fpi->has_phy)) | |
65 | return 1; | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static int fs_mii_fec_init(struct fec_info* fec, struct fs_mii_fec_platform_info *fmpi) | |
70 | { | |
71 | struct resource *r; | |
72 | fec_t *fecp; | |
73 | char* name = "fsl-cpm-fec"; | |
74 | ||
75 | /* we need fec in order to be useful */ | |
76 | struct platform_device *fec_pdev = | |
77 | container_of(bus_find_device(&platform_bus_type, NULL, name, match_has_phy), | |
78 | struct platform_device, dev); | |
79 | ||
80 | if(fec_pdev == NULL) { | |
81 | printk(KERN_ERR"Unable to find PHY for %s", name); | |
82 | return -ENODEV; | |
83 | } | |
84 | ||
85 | r = platform_get_resource_byname(fec_pdev, IORESOURCE_MEM, "regs"); | |
86 | ||
87 | fec->fecp = fecp = (fec_t*)ioremap(r->start,sizeof(fec_t)); | |
88 | fec->mii_speed = fmpi->mii_speed; | |
89 | ||
90 | setbits32(&fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */ | |
91 | setbits32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN); | |
92 | out_be32(&fecp->fec_ievent, FEC_ENET_MII); | |
93 | out_be32(&fecp->fec_mii_speed, fec->mii_speed); | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
98 | static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location) | |
99 | { | |
100 | struct fec_info* fec = bus->priv; | |
101 | fec_t *fecp = fec->fecp; | |
102 | int i, ret = -1; | |
103 | ||
104 | if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0) | |
105 | BUG(); | |
106 | ||
107 | /* Add PHY address to register command. */ | |
108 | out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location)); | |
109 | ||
110 | for (i = 0; i < FEC_MII_LOOPS; i++) | |
111 | if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) | |
112 | break; | |
113 | ||
114 | if (i < FEC_MII_LOOPS) { | |
115 | out_be32(&fecp->fec_ievent, FEC_ENET_MII); | |
116 | ret = in_be32(&fecp->fec_mii_data) & 0xffff; | |
117 | } | |
118 | ||
119 | return ret; | |
120 | ||
121 | } | |
122 | ||
123 | static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val) | |
124 | { | |
125 | struct fec_info* fec = bus->priv; | |
126 | fec_t *fecp = fec->fecp; | |
127 | int i; | |
128 | ||
129 | /* this must never happen */ | |
130 | if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0) | |
131 | BUG(); | |
132 | ||
133 | /* Add PHY address to register command. */ | |
134 | out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val)); | |
135 | ||
136 | for (i = 0; i < FEC_MII_LOOPS; i++) | |
137 | if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) | |
138 | break; | |
139 | ||
140 | if (i < FEC_MII_LOOPS) | |
141 | out_be32(&fecp->fec_ievent, FEC_ENET_MII); | |
142 | ||
143 | return 0; | |
144 | ||
145 | } | |
146 | ||
147 | static int fs_enet_fec_mii_reset(struct mii_bus *bus) | |
148 | { | |
149 | /* nothing here - for now */ | |
150 | return 0; | |
151 | } | |
152 | ||
153 | static int __devinit fs_enet_fec_mdio_probe(struct device *dev) | |
154 | { | |
155 | struct platform_device *pdev = to_platform_device(dev); | |
156 | struct fs_mii_fec_platform_info *pdata; | |
157 | struct mii_bus *new_bus; | |
158 | struct fec_info *fec; | |
159 | int err = 0; | |
160 | if (NULL == dev) | |
161 | return -EINVAL; | |
162 | new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL); | |
163 | ||
164 | if (NULL == new_bus) | |
165 | return -ENOMEM; | |
166 | ||
167 | fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL); | |
168 | ||
169 | if (NULL == fec) | |
170 | return -ENOMEM; | |
171 | ||
172 | new_bus->name = "FEC MII Bus", | |
173 | new_bus->read = &fs_enet_fec_mii_read, | |
174 | new_bus->write = &fs_enet_fec_mii_write, | |
175 | new_bus->reset = &fs_enet_fec_mii_reset, | |
176 | new_bus->id = pdev->id; | |
177 | ||
178 | pdata = (struct fs_mii_fec_platform_info *)pdev->dev.platform_data; | |
179 | ||
180 | if (NULL == pdata) { | |
181 | printk(KERN_ERR "fs_enet FEC mdio %d: Missing platform data!\n", pdev->id); | |
182 | return -ENODEV; | |
183 | } | |
184 | ||
185 | /*set up workspace*/ | |
186 | ||
187 | fs_mii_fec_init(fec, pdata); | |
188 | new_bus->priv = fec; | |
189 | ||
190 | new_bus->irq = pdata->irq; | |
191 | ||
192 | new_bus->dev = dev; | |
193 | dev_set_drvdata(dev, new_bus); | |
194 | ||
195 | err = mdiobus_register(new_bus); | |
196 | ||
197 | if (0 != err) { | |
198 | printk (KERN_ERR "%s: Cannot register as MDIO bus\n", | |
199 | new_bus->name); | |
200 | goto bus_register_fail; | |
201 | } | |
202 | ||
203 | return 0; | |
204 | ||
205 | bus_register_fail: | |
206 | kfree(new_bus); | |
207 | ||
208 | return err; | |
209 | } | |
210 | ||
211 | ||
212 | static int fs_enet_fec_mdio_remove(struct device *dev) | |
213 | { | |
214 | struct mii_bus *bus = dev_get_drvdata(dev); | |
215 | ||
216 | mdiobus_unregister(bus); | |
217 | ||
218 | dev_set_drvdata(dev, NULL); | |
219 | kfree(bus->priv); | |
220 | ||
221 | bus->priv = NULL; | |
222 | kfree(bus); | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | static struct device_driver fs_enet_fec_mdio_driver = { | |
228 | .name = "fsl-cpm-fec-mdio", | |
229 | .bus = &platform_bus_type, | |
230 | .probe = fs_enet_fec_mdio_probe, | |
231 | .remove = fs_enet_fec_mdio_remove, | |
232 | }; | |
233 | ||
234 | int fs_enet_mdio_fec_init(void) | |
235 | { | |
236 | return driver_register(&fs_enet_fec_mdio_driver); | |
237 | } | |
238 | ||
239 | void fs_enet_mdio_fec_exit(void) | |
240 | { | |
241 | driver_unregister(&fs_enet_fec_mdio_driver); | |
242 | } | |
243 |