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/delay.h> |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/skbuff.h> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/mii.h> | |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/bitops.h> | |
32 | #include <linux/platform_device.h> | |
5af50730 | 33 | #include <linux/of_address.h> |
b219108c | 34 | #include <linux/of_platform.h> |
5b4b8454 VB |
35 | |
36 | #include <asm/pgtable.h> | |
37 | #include <asm/irq.h> | |
7c0f6ba6 | 38 | #include <linux/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; | |
60ab4361 | 55 | struct fec __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; | |
60ab4361 | 78 | struct fec __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 | ||
94e5a2a8 | 98 | static const struct of_device_id fs_enet_mdio_fec_match[]; |
4f2c53ea | 99 | static int fs_enet_mdio_probe(struct platform_device *ofdev) |
976de6a8 | 100 | { |
b1608d69 | 101 | const struct of_device_id *match; |
976de6a8 SW |
102 | struct resource res; |
103 | struct mii_bus *new_bus; | |
104 | struct fec_info *fec; | |
74888760 | 105 | int (*get_bus_freq)(struct device_node *); |
652f6787 | 106 | int ret = -ENOMEM, clock, speed; |
976de6a8 | 107 | |
b1608d69 GL |
108 | match = of_match_device(fs_enet_mdio_fec_match, &ofdev->dev); |
109 | if (!match) | |
74888760 | 110 | return -EINVAL; |
b1608d69 | 111 | get_bus_freq = match->data; |
74888760 | 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; | |
976de6a8 | 125 | |
61c7a080 | 126 | ret = of_address_to_resource(ofdev->dev.of_node, 0, &res); |
976de6a8 | 127 | if (ret) |
a86e2cbe | 128 | goto out_res; |
976de6a8 | 129 | |
9d9326d3 | 130 | snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start); |
976de6a8 | 131 | |
28f65c11 | 132 | fec->fecp = ioremap(res.start, resource_size(&res)); |
137bc99f JL |
133 | if (!fec->fecp) { |
134 | ret = -ENOMEM; | |
976de6a8 | 135 | goto out_fec; |
137bc99f | 136 | } |
976de6a8 | 137 | |
652f6787 | 138 | if (get_bus_freq) { |
61c7a080 | 139 | clock = get_bus_freq(ofdev->dev.of_node); |
652f6787 WD |
140 | if (!clock) { |
141 | /* Use maximum divider if clock is unknown */ | |
142 | dev_warn(&ofdev->dev, "could not determine IPS clock\n"); | |
143 | clock = 0x3F * 5000000; | |
144 | } | |
145 | } else | |
146 | clock = ppc_proc_freq; | |
147 | ||
148 | /* | |
149 | * Scale for a MII clock <= 2.5 MHz | |
150 | * Note that only 6 bits (25:30) are available for MII speed. | |
151 | */ | |
152 | speed = (clock + 4999999) / 5000000; | |
153 | if (speed > 0x3F) { | |
154 | speed = 0x3F; | |
155 | dev_err(&ofdev->dev, | |
156 | "MII clock (%d Hz) exceeds max (2.5 MHz)\n", | |
157 | clock / speed); | |
158 | } | |
159 | ||
160 | fec->mii_speed = speed << 1; | |
976de6a8 SW |
161 | |
162 | setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); | |
163 | setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | | |
164 | FEC_ECNTRL_ETHER_EN); | |
165 | out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII); | |
652f6787 | 166 | clrsetbits_be32(&fec->fecp->fec_mii_speed, 0x7E, fec->mii_speed); |
976de6a8 SW |
167 | |
168 | new_bus->phy_mask = ~0; | |
976de6a8 | 169 | |
18ee49dd | 170 | new_bus->parent = &ofdev->dev; |
8513fbd8 | 171 | platform_set_drvdata(ofdev, new_bus); |
976de6a8 | 172 | |
61c7a080 | 173 | ret = of_mdiobus_register(new_bus, ofdev->dev.of_node); |
976de6a8 | 174 | if (ret) |
e7f4dc35 | 175 | goto out_unmap_regs; |
976de6a8 SW |
176 | |
177 | return 0; | |
178 | ||
976de6a8 SW |
179 | out_unmap_regs: |
180 | iounmap(fec->fecp); | |
a86e2cbe | 181 | out_res: |
976de6a8 SW |
182 | out_fec: |
183 | kfree(fec); | |
184 | out_mii: | |
298cf9be | 185 | mdiobus_free(new_bus); |
976de6a8 SW |
186 | out: |
187 | return ret; | |
188 | } | |
189 | ||
2dc11581 | 190 | static int fs_enet_mdio_remove(struct platform_device *ofdev) |
976de6a8 | 191 | { |
8513fbd8 | 192 | struct mii_bus *bus = platform_get_drvdata(ofdev); |
976de6a8 SW |
193 | struct fec_info *fec = bus->priv; |
194 | ||
195 | mdiobus_unregister(bus); | |
976de6a8 SW |
196 | iounmap(fec->fecp); |
197 | kfree(fec); | |
298cf9be | 198 | mdiobus_free(bus); |
976de6a8 SW |
199 | |
200 | return 0; | |
201 | } | |
202 | ||
94e5a2a8 | 203 | static const struct of_device_id fs_enet_mdio_fec_match[] = { |
976de6a8 SW |
204 | { |
205 | .compatible = "fsl,pq1-fec-mdio", | |
206 | }, | |
652f6787 WD |
207 | #if defined(CONFIG_PPC_MPC512x) |
208 | { | |
209 | .compatible = "fsl,mpc5121-fec-mdio", | |
210 | .data = mpc5xxx_get_bus_frequency, | |
211 | }, | |
212 | #endif | |
976de6a8 SW |
213 | {}, |
214 | }; | |
e72701ac | 215 | MODULE_DEVICE_TABLE(of, fs_enet_mdio_fec_match); |
976de6a8 | 216 | |
74888760 | 217 | static struct platform_driver fs_enet_fec_mdio_driver = { |
4018294b GL |
218 | .driver = { |
219 | .name = "fsl-fec-mdio", | |
4018294b GL |
220 | .of_match_table = fs_enet_mdio_fec_match, |
221 | }, | |
976de6a8 SW |
222 | .probe = fs_enet_mdio_probe, |
223 | .remove = fs_enet_mdio_remove, | |
224 | }; | |
225 | ||
db62f684 | 226 | module_platform_driver(fs_enet_fec_mdio_driver); |