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> | |
5af50730 | 34 | #include <linux/of_address.h> |
b219108c | 35 | #include <linux/of_platform.h> |
5b4b8454 VB |
36 | |
37 | #include <asm/pgtable.h> | |
38 | #include <asm/irq.h> | |
39 | #include <asm/uaccess.h> | |
652f6787 | 40 | #include <asm/mpc5xxx.h> |
5b4b8454 VB |
41 | |
42 | #include "fs_enet.h" | |
43 | #include "fec.h" | |
44 | ||
45 | /* Make MII read/write commands for the FEC. | |
46 | */ | |
47 | #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18)) | |
48 | #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff)) | |
49 | #define mk_mii_end 0 | |
50 | ||
51 | #define FEC_MII_LOOPS 10000 | |
52 | ||
5b4b8454 VB |
53 | static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location) |
54 | { | |
55 | struct fec_info* fec = bus->priv; | |
60ab4361 | 56 | struct fec __iomem *fecp = fec->fecp; |
5b4b8454 VB |
57 | int i, ret = -1; |
58 | ||
0ee904c3 | 59 | BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0); |
5b4b8454 VB |
60 | |
61 | /* Add PHY address to register command. */ | |
62 | out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location)); | |
63 | ||
64 | for (i = 0; i < FEC_MII_LOOPS; i++) | |
65 | if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) | |
66 | break; | |
67 | ||
68 | if (i < FEC_MII_LOOPS) { | |
69 | out_be32(&fecp->fec_ievent, FEC_ENET_MII); | |
70 | ret = in_be32(&fecp->fec_mii_data) & 0xffff; | |
71 | } | |
72 | ||
73 | return ret; | |
5b4b8454 VB |
74 | } |
75 | ||
76 | static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val) | |
77 | { | |
78 | struct fec_info* fec = bus->priv; | |
60ab4361 | 79 | struct fec __iomem *fecp = fec->fecp; |
5b4b8454 VB |
80 | int i; |
81 | ||
82 | /* this must never happen */ | |
0ee904c3 | 83 | BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0); |
5b4b8454 VB |
84 | |
85 | /* Add PHY address to register command. */ | |
86 | out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val)); | |
87 | ||
88 | for (i = 0; i < FEC_MII_LOOPS; i++) | |
89 | if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) | |
90 | break; | |
91 | ||
92 | if (i < FEC_MII_LOOPS) | |
93 | out_be32(&fecp->fec_ievent, FEC_ENET_MII); | |
94 | ||
95 | return 0; | |
96 | ||
97 | } | |
98 | ||
99 | static int fs_enet_fec_mii_reset(struct mii_bus *bus) | |
100 | { | |
101 | /* nothing here - for now */ | |
102 | return 0; | |
103 | } | |
104 | ||
b1608d69 | 105 | static struct of_device_id fs_enet_mdio_fec_match[]; |
4f2c53ea | 106 | static int fs_enet_mdio_probe(struct platform_device *ofdev) |
976de6a8 | 107 | { |
b1608d69 | 108 | const struct of_device_id *match; |
976de6a8 SW |
109 | struct resource res; |
110 | struct mii_bus *new_bus; | |
111 | struct fec_info *fec; | |
74888760 | 112 | int (*get_bus_freq)(struct device_node *); |
652f6787 | 113 | int ret = -ENOMEM, clock, speed; |
976de6a8 | 114 | |
b1608d69 GL |
115 | match = of_match_device(fs_enet_mdio_fec_match, &ofdev->dev); |
116 | if (!match) | |
74888760 | 117 | return -EINVAL; |
b1608d69 | 118 | get_bus_freq = match->data; |
74888760 | 119 | |
298cf9be | 120 | new_bus = mdiobus_alloc(); |
976de6a8 SW |
121 | if (!new_bus) |
122 | goto out; | |
123 | ||
124 | fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL); | |
125 | if (!fec) | |
126 | goto out_mii; | |
127 | ||
128 | new_bus->priv = fec; | |
129 | new_bus->name = "FEC MII Bus"; | |
130 | new_bus->read = &fs_enet_fec_mii_read; | |
131 | new_bus->write = &fs_enet_fec_mii_write; | |
132 | new_bus->reset = &fs_enet_fec_mii_reset; | |
133 | ||
61c7a080 | 134 | ret = of_address_to_resource(ofdev->dev.of_node, 0, &res); |
976de6a8 | 135 | if (ret) |
a86e2cbe | 136 | goto out_res; |
976de6a8 | 137 | |
9d9326d3 | 138 | snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start); |
976de6a8 | 139 | |
28f65c11 | 140 | fec->fecp = ioremap(res.start, resource_size(&res)); |
137bc99f JL |
141 | if (!fec->fecp) { |
142 | ret = -ENOMEM; | |
976de6a8 | 143 | goto out_fec; |
137bc99f | 144 | } |
976de6a8 | 145 | |
652f6787 | 146 | if (get_bus_freq) { |
61c7a080 | 147 | clock = get_bus_freq(ofdev->dev.of_node); |
652f6787 WD |
148 | if (!clock) { |
149 | /* Use maximum divider if clock is unknown */ | |
150 | dev_warn(&ofdev->dev, "could not determine IPS clock\n"); | |
151 | clock = 0x3F * 5000000; | |
152 | } | |
153 | } else | |
154 | clock = ppc_proc_freq; | |
155 | ||
156 | /* | |
157 | * Scale for a MII clock <= 2.5 MHz | |
158 | * Note that only 6 bits (25:30) are available for MII speed. | |
159 | */ | |
160 | speed = (clock + 4999999) / 5000000; | |
161 | if (speed > 0x3F) { | |
162 | speed = 0x3F; | |
163 | dev_err(&ofdev->dev, | |
164 | "MII clock (%d Hz) exceeds max (2.5 MHz)\n", | |
165 | clock / speed); | |
166 | } | |
167 | ||
168 | fec->mii_speed = speed << 1; | |
976de6a8 SW |
169 | |
170 | setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); | |
171 | setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | | |
172 | FEC_ECNTRL_ETHER_EN); | |
173 | out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII); | |
652f6787 | 174 | clrsetbits_be32(&fec->fecp->fec_mii_speed, 0x7E, fec->mii_speed); |
976de6a8 SW |
175 | |
176 | new_bus->phy_mask = ~0; | |
177 | new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); | |
137bc99f JL |
178 | if (!new_bus->irq) { |
179 | ret = -ENOMEM; | |
976de6a8 | 180 | goto out_unmap_regs; |
137bc99f | 181 | } |
976de6a8 | 182 | |
18ee49dd | 183 | new_bus->parent = &ofdev->dev; |
8513fbd8 | 184 | platform_set_drvdata(ofdev, new_bus); |
976de6a8 | 185 | |
61c7a080 | 186 | ret = of_mdiobus_register(new_bus, ofdev->dev.of_node); |
976de6a8 SW |
187 | if (ret) |
188 | goto out_free_irqs; | |
189 | ||
190 | return 0; | |
191 | ||
192 | out_free_irqs: | |
976de6a8 SW |
193 | kfree(new_bus->irq); |
194 | out_unmap_regs: | |
195 | iounmap(fec->fecp); | |
a86e2cbe | 196 | out_res: |
976de6a8 SW |
197 | out_fec: |
198 | kfree(fec); | |
199 | out_mii: | |
298cf9be | 200 | mdiobus_free(new_bus); |
976de6a8 SW |
201 | out: |
202 | return ret; | |
203 | } | |
204 | ||
2dc11581 | 205 | static int fs_enet_mdio_remove(struct platform_device *ofdev) |
976de6a8 | 206 | { |
8513fbd8 | 207 | struct mii_bus *bus = platform_get_drvdata(ofdev); |
976de6a8 SW |
208 | struct fec_info *fec = bus->priv; |
209 | ||
210 | mdiobus_unregister(bus); | |
976de6a8 SW |
211 | kfree(bus->irq); |
212 | iounmap(fec->fecp); | |
213 | kfree(fec); | |
298cf9be | 214 | mdiobus_free(bus); |
976de6a8 SW |
215 | |
216 | return 0; | |
217 | } | |
218 | ||
219 | static struct of_device_id fs_enet_mdio_fec_match[] = { | |
220 | { | |
221 | .compatible = "fsl,pq1-fec-mdio", | |
222 | }, | |
652f6787 WD |
223 | #if defined(CONFIG_PPC_MPC512x) |
224 | { | |
225 | .compatible = "fsl,mpc5121-fec-mdio", | |
226 | .data = mpc5xxx_get_bus_frequency, | |
227 | }, | |
228 | #endif | |
976de6a8 SW |
229 | {}, |
230 | }; | |
e72701ac | 231 | MODULE_DEVICE_TABLE(of, fs_enet_mdio_fec_match); |
976de6a8 | 232 | |
74888760 | 233 | static struct platform_driver fs_enet_fec_mdio_driver = { |
4018294b GL |
234 | .driver = { |
235 | .name = "fsl-fec-mdio", | |
236 | .owner = THIS_MODULE, | |
237 | .of_match_table = fs_enet_mdio_fec_match, | |
238 | }, | |
976de6a8 SW |
239 | .probe = fs_enet_mdio_probe, |
240 | .remove = fs_enet_mdio_remove, | |
241 | }; | |
242 | ||
db62f684 | 243 | module_platform_driver(fs_enet_fec_mdio_driver); |