Commit | Line | Data |
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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 | ||
5b4b8454 VB |
15 | #include <linux/module.h> |
16 | #include <linux/types.h> | |
17 | #include <linux/kernel.h> | |
5b4b8454 VB |
18 | #include <linux/string.h> |
19 | #include <linux/ptrace.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/ioport.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/interrupt.h> | |
5b4b8454 VB |
24 | #include <linux/init.h> |
25 | #include <linux/delay.h> | |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/etherdevice.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/spinlock.h> | |
30 | #include <linux/mii.h> | |
31 | #include <linux/ethtool.h> | |
32 | #include <linux/bitops.h> | |
33 | #include <linux/platform_device.h> | |
b219108c | 34 | #include <linux/of_platform.h> |
5b4b8454 VB |
35 | |
36 | #include <asm/pgtable.h> | |
37 | #include <asm/irq.h> | |
38 | #include <asm/uaccess.h> | |
652f6787 | 39 | #include <asm/mpc5xxx.h> |
5b4b8454 VB |
40 | |
41 | #include "fs_enet.h" | |
42 | #include "fec.h" | |
43 | ||
44 | /* Make MII read/write commands for the FEC. | |
45 | */ | |
46 | #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18)) | |
47 | #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff)) | |
48 | #define mk_mii_end 0 | |
49 | ||
50 | #define FEC_MII_LOOPS 10000 | |
51 | ||
5b4b8454 VB |
52 | static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location) |
53 | { | |
54 | struct fec_info* fec = bus->priv; | |
31a5bb04 | 55 | fec_t __iomem *fecp = fec->fecp; |
5b4b8454 VB |
56 | int i, ret = -1; |
57 | ||
0ee904c3 | 58 | BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0); |
5b4b8454 VB |
59 | |
60 | /* Add PHY address to register command. */ | |
61 | out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location)); | |
62 | ||
63 | for (i = 0; i < FEC_MII_LOOPS; i++) | |
64 | if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) | |
65 | break; | |
66 | ||
67 | if (i < FEC_MII_LOOPS) { | |
68 | out_be32(&fecp->fec_ievent, FEC_ENET_MII); | |
69 | ret = in_be32(&fecp->fec_mii_data) & 0xffff; | |
70 | } | |
71 | ||
72 | return ret; | |
5b4b8454 VB |
73 | } |
74 | ||
75 | static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val) | |
76 | { | |
77 | struct fec_info* fec = bus->priv; | |
31a5bb04 | 78 | fec_t __iomem *fecp = fec->fecp; |
5b4b8454 VB |
79 | int i; |
80 | ||
81 | /* this must never happen */ | |
0ee904c3 | 82 | BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0); |
5b4b8454 VB |
83 | |
84 | /* Add PHY address to register command. */ | |
85 | out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val)); | |
86 | ||
87 | for (i = 0; i < FEC_MII_LOOPS; i++) | |
88 | if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) | |
89 | break; | |
90 | ||
91 | if (i < FEC_MII_LOOPS) | |
92 | out_be32(&fecp->fec_ievent, FEC_ENET_MII); | |
93 | ||
94 | return 0; | |
95 | ||
96 | } | |
97 | ||
98 | static int fs_enet_fec_mii_reset(struct mii_bus *bus) | |
99 | { | |
100 | /* nothing here - for now */ | |
101 | return 0; | |
102 | } | |
103 | ||
976de6a8 SW |
104 | static int __devinit fs_enet_mdio_probe(struct of_device *ofdev, |
105 | const struct of_device_id *match) | |
106 | { | |
976de6a8 SW |
107 | struct resource res; |
108 | struct mii_bus *new_bus; | |
109 | struct fec_info *fec; | |
652f6787 WD |
110 | int (*get_bus_freq)(struct device_node *) = match->data; |
111 | int ret = -ENOMEM, clock, speed; | |
976de6a8 | 112 | |
298cf9be | 113 | new_bus = mdiobus_alloc(); |
976de6a8 SW |
114 | if (!new_bus) |
115 | goto out; | |
116 | ||
117 | fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL); | |
118 | if (!fec) | |
119 | goto out_mii; | |
120 | ||
121 | new_bus->priv = fec; | |
122 | new_bus->name = "FEC MII Bus"; | |
123 | new_bus->read = &fs_enet_fec_mii_read; | |
124 | new_bus->write = &fs_enet_fec_mii_write; | |
125 | new_bus->reset = &fs_enet_fec_mii_reset; | |
126 | ||
127 | ret = of_address_to_resource(ofdev->node, 0, &res); | |
128 | if (ret) | |
a86e2cbe | 129 | goto out_res; |
976de6a8 | 130 | |
9d9326d3 | 131 | snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start); |
976de6a8 SW |
132 | |
133 | fec->fecp = ioremap(res.start, res.end - res.start + 1); | |
134 | if (!fec->fecp) | |
135 | goto out_fec; | |
136 | ||
652f6787 WD |
137 | if (get_bus_freq) { |
138 | clock = get_bus_freq(ofdev->node); | |
139 | if (!clock) { | |
140 | /* Use maximum divider if clock is unknown */ | |
141 | dev_warn(&ofdev->dev, "could not determine IPS clock\n"); | |
142 | clock = 0x3F * 5000000; | |
143 | } | |
144 | } else | |
145 | clock = ppc_proc_freq; | |
146 | ||
147 | /* | |
148 | * Scale for a MII clock <= 2.5 MHz | |
149 | * Note that only 6 bits (25:30) are available for MII speed. | |
150 | */ | |
151 | speed = (clock + 4999999) / 5000000; | |
152 | if (speed > 0x3F) { | |
153 | speed = 0x3F; | |
154 | dev_err(&ofdev->dev, | |
155 | "MII clock (%d Hz) exceeds max (2.5 MHz)\n", | |
156 | clock / speed); | |
157 | } | |
158 | ||
159 | fec->mii_speed = speed << 1; | |
976de6a8 SW |
160 | |
161 | setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); | |
162 | setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | | |
163 | FEC_ECNTRL_ETHER_EN); | |
164 | out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII); | |
652f6787 | 165 | clrsetbits_be32(&fec->fecp->fec_mii_speed, 0x7E, fec->mii_speed); |
976de6a8 SW |
166 | |
167 | new_bus->phy_mask = ~0; | |
168 | new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); | |
169 | if (!new_bus->irq) | |
170 | goto out_unmap_regs; | |
171 | ||
18ee49dd | 172 | new_bus->parent = &ofdev->dev; |
976de6a8 SW |
173 | dev_set_drvdata(&ofdev->dev, new_bus); |
174 | ||
aa73832c | 175 | ret = of_mdiobus_register(new_bus, ofdev->node); |
976de6a8 SW |
176 | if (ret) |
177 | goto out_free_irqs; | |
178 | ||
179 | return 0; | |
180 | ||
181 | out_free_irqs: | |
182 | dev_set_drvdata(&ofdev->dev, NULL); | |
183 | kfree(new_bus->irq); | |
184 | out_unmap_regs: | |
185 | iounmap(fec->fecp); | |
a86e2cbe | 186 | out_res: |
976de6a8 SW |
187 | out_fec: |
188 | kfree(fec); | |
189 | out_mii: | |
298cf9be | 190 | mdiobus_free(new_bus); |
976de6a8 SW |
191 | out: |
192 | return ret; | |
193 | } | |
194 | ||
195 | static int fs_enet_mdio_remove(struct of_device *ofdev) | |
196 | { | |
197 | struct mii_bus *bus = dev_get_drvdata(&ofdev->dev); | |
198 | struct fec_info *fec = bus->priv; | |
199 | ||
200 | mdiobus_unregister(bus); | |
201 | dev_set_drvdata(&ofdev->dev, NULL); | |
202 | kfree(bus->irq); | |
203 | iounmap(fec->fecp); | |
204 | kfree(fec); | |
298cf9be | 205 | mdiobus_free(bus); |
976de6a8 SW |
206 | |
207 | return 0; | |
208 | } | |
209 | ||
210 | static struct of_device_id fs_enet_mdio_fec_match[] = { | |
211 | { | |
212 | .compatible = "fsl,pq1-fec-mdio", | |
213 | }, | |
652f6787 WD |
214 | #if defined(CONFIG_PPC_MPC512x) |
215 | { | |
216 | .compatible = "fsl,mpc5121-fec-mdio", | |
217 | .data = mpc5xxx_get_bus_frequency, | |
218 | }, | |
219 | #endif | |
976de6a8 SW |
220 | {}, |
221 | }; | |
e72701ac | 222 | MODULE_DEVICE_TABLE(of, fs_enet_mdio_fec_match); |
976de6a8 SW |
223 | |
224 | static struct of_platform_driver fs_enet_fec_mdio_driver = { | |
225 | .name = "fsl-fec-mdio", | |
226 | .match_table = fs_enet_mdio_fec_match, | |
227 | .probe = fs_enet_mdio_probe, | |
228 | .remove = fs_enet_mdio_remove, | |
229 | }; | |
230 | ||
231 | static int fs_enet_mdio_fec_init(void) | |
232 | { | |
233 | return of_register_platform_driver(&fs_enet_fec_mdio_driver); | |
234 | } | |
235 | ||
236 | static void fs_enet_mdio_fec_exit(void) | |
237 | { | |
238 | of_unregister_platform_driver(&fs_enet_fec_mdio_driver); | |
239 | } | |
240 | ||
241 | module_init(fs_enet_mdio_fec_init); | |
242 | module_exit(fs_enet_mdio_fec_exit); |