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1 | /***************************************************************************** |
2 | * * | |
3 | * File: mv88x201x.c * | |
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4 | * $Revision: 1.12 $ * |
5 | * $Date: 2005/04/15 19:27:14 $ * | |
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6 | * Description: * |
7 | * Marvell PHY (mv88x201x) functionality. * | |
8 | * part of the Chelsio 10Gb Ethernet Driver. * | |
9 | * * | |
10 | * This program is free software; you can redistribute it and/or modify * | |
11 | * it under the terms of the GNU General Public License, version 2, as * | |
12 | * published by the Free Software Foundation. * | |
13 | * * | |
14 | * You should have received a copy of the GNU General Public License along * | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., * | |
16 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * | |
17 | * * | |
18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * | |
19 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * | |
20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * | |
21 | * * | |
22 | * http://www.chelsio.com * | |
23 | * * | |
24 | * Copyright (c) 2003 - 2005 Chelsio Communications, Inc. * | |
25 | * All rights reserved. * | |
26 | * * | |
27 | * Maintainers: maintainers@chelsio.com * | |
28 | * * | |
29 | * Authors: Dimitrios Michailidis <dm@chelsio.com> * | |
30 | * Tina Yang <tainay@chelsio.com> * | |
31 | * Felix Marti <felix@chelsio.com> * | |
32 | * Scott Bardone <sbardone@chelsio.com> * | |
33 | * Kurt Ottaway <kottaway@chelsio.com> * | |
34 | * Frank DiMambro <frank@chelsio.com> * | |
35 | * * | |
36 | * History: * | |
37 | * * | |
38 | ****************************************************************************/ | |
39 | ||
40 | #include "cphy.h" | |
41 | #include "elmer0.h" | |
42 | ||
43 | /* | |
44 | * The 88x2010 Rev C. requires some link status registers * to be read | |
45 | * twice in order to get the right values. Future * revisions will fix | |
46 | * this problem and then this macro * can disappear. | |
47 | */ | |
48 | #define MV88x2010_LINK_STATUS_BUGS 1 | |
49 | ||
50 | static int led_init(struct cphy *cphy) | |
51 | { | |
52 | /* Setup the LED registers so we can turn on/off. | |
53 | * Writing these bits maps control to another | |
54 | * register. mmd(0x1) addr(0x7) | |
55 | */ | |
56 | mdio_write(cphy, 0x3, 0x8304, 0xdddd); | |
57 | return 0; | |
58 | } | |
59 | ||
60 | static int led_link(struct cphy *cphy, u32 do_enable) | |
61 | { | |
62 | u32 led = 0; | |
63 | #define LINK_ENABLE_BIT 0x1 | |
64 | ||
65 | mdio_read(cphy, 0x1, 0x7, &led); | |
66 | ||
67 | if (do_enable & LINK_ENABLE_BIT) { | |
68 | led |= LINK_ENABLE_BIT; | |
69 | mdio_write(cphy, 0x1, 0x7, led); | |
70 | } else { | |
71 | led &= ~LINK_ENABLE_BIT; | |
72 | mdio_write(cphy, 0x1, 0x7, led); | |
73 | } | |
74 | return 0; | |
75 | } | |
76 | ||
77 | /* Port Reset */ | |
78 | static int mv88x201x_reset(struct cphy *cphy, int wait) | |
79 | { | |
80 | /* This can be done through registers. It is not required since | |
81 | * a full chip reset is used. | |
82 | */ | |
83 | return 0; | |
84 | } | |
85 | ||
86 | static int mv88x201x_interrupt_enable(struct cphy *cphy) | |
87 | { | |
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88 | u32 elmer; |
89 | ||
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90 | /* Enable PHY LASI interrupts. */ |
91 | mdio_write(cphy, 0x1, 0x9002, 0x1); | |
92 | ||
93 | /* Enable Marvell interrupts through Elmer0. */ | |
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94 | t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer); |
95 | elmer |= ELMER0_GP_BIT6; | |
96 | t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer); | |
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97 | return 0; |
98 | } | |
99 | ||
100 | static int mv88x201x_interrupt_disable(struct cphy *cphy) | |
101 | { | |
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102 | u32 elmer; |
103 | ||
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104 | /* Disable PHY LASI interrupts. */ |
105 | mdio_write(cphy, 0x1, 0x9002, 0x0); | |
106 | ||
107 | /* Disable Marvell interrupts through Elmer0. */ | |
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108 | t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer); |
109 | elmer &= ~ELMER0_GP_BIT6; | |
110 | t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer); | |
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111 | return 0; |
112 | } | |
113 | ||
114 | static int mv88x201x_interrupt_clear(struct cphy *cphy) | |
115 | { | |
116 | u32 elmer; | |
117 | u32 val; | |
118 | ||
119 | #ifdef MV88x2010_LINK_STATUS_BUGS | |
120 | /* Required to read twice before clear takes affect. */ | |
121 | mdio_read(cphy, 0x1, 0x9003, &val); | |
122 | mdio_read(cphy, 0x1, 0x9004, &val); | |
123 | mdio_read(cphy, 0x1, 0x9005, &val); | |
124 | ||
125 | /* Read this register after the others above it else | |
126 | * the register doesn't clear correctly. | |
127 | */ | |
128 | mdio_read(cphy, 0x1, 0x1, &val); | |
129 | #endif | |
130 | ||
131 | /* Clear link status. */ | |
132 | mdio_read(cphy, 0x1, 0x1, &val); | |
133 | /* Clear PHY LASI interrupts. */ | |
134 | mdio_read(cphy, 0x1, 0x9005, &val); | |
135 | ||
136 | #ifdef MV88x2010_LINK_STATUS_BUGS | |
137 | /* Do it again. */ | |
138 | mdio_read(cphy, 0x1, 0x9003, &val); | |
139 | mdio_read(cphy, 0x1, 0x9004, &val); | |
140 | #endif | |
141 | ||
142 | /* Clear Marvell interrupts through Elmer0. */ | |
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143 | t1_tpi_read(cphy->adapter, A_ELMER0_INT_CAUSE, &elmer); |
144 | elmer |= ELMER0_GP_BIT6; | |
145 | t1_tpi_write(cphy->adapter, A_ELMER0_INT_CAUSE, elmer); | |
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146 | return 0; |
147 | } | |
148 | ||
149 | static int mv88x201x_interrupt_handler(struct cphy *cphy) | |
150 | { | |
151 | /* Clear interrupts */ | |
152 | mv88x201x_interrupt_clear(cphy); | |
153 | ||
154 | /* We have only enabled link change interrupts and so | |
155 | * cphy_cause must be a link change interrupt. | |
156 | */ | |
157 | return cphy_cause_link_change; | |
158 | } | |
159 | ||
160 | static int mv88x201x_set_loopback(struct cphy *cphy, int on) | |
161 | { | |
162 | return 0; | |
163 | } | |
164 | ||
165 | static int mv88x201x_get_link_status(struct cphy *cphy, int *link_ok, | |
166 | int *speed, int *duplex, int *fc) | |
167 | { | |
168 | u32 val = 0; | |
169 | #define LINK_STATUS_BIT 0x4 | |
170 | ||
171 | if (link_ok) { | |
172 | /* Read link status. */ | |
173 | mdio_read(cphy, 0x1, 0x1, &val); | |
174 | val &= LINK_STATUS_BIT; | |
175 | *link_ok = (val == LINK_STATUS_BIT); | |
176 | /* Turn on/off Link LED */ | |
177 | led_link(cphy, *link_ok); | |
178 | } | |
179 | if (speed) | |
180 | *speed = SPEED_10000; | |
181 | if (duplex) | |
182 | *duplex = DUPLEX_FULL; | |
183 | if (fc) | |
184 | *fc = PAUSE_RX | PAUSE_TX; | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static void mv88x201x_destroy(struct cphy *cphy) | |
189 | { | |
190 | kfree(cphy); | |
191 | } | |
192 | ||
193 | static struct cphy_ops mv88x201x_ops = { | |
194 | .destroy = mv88x201x_destroy, | |
195 | .reset = mv88x201x_reset, | |
196 | .interrupt_enable = mv88x201x_interrupt_enable, | |
197 | .interrupt_disable = mv88x201x_interrupt_disable, | |
198 | .interrupt_clear = mv88x201x_interrupt_clear, | |
199 | .interrupt_handler = mv88x201x_interrupt_handler, | |
200 | .get_link_status = mv88x201x_get_link_status, | |
201 | .set_loopback = mv88x201x_set_loopback, | |
202 | }; | |
203 | ||
204 | static struct cphy *mv88x201x_phy_create(adapter_t *adapter, int phy_addr, | |
205 | struct mdio_ops *mdio_ops) | |
206 | { | |
207 | u32 val; | |
1270266c | 208 | struct cphy *cphy = kzalloc(sizeof(*cphy), GFP_KERNEL); |
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209 | |
210 | if (!cphy) | |
211 | return NULL; | |
1270266c | 212 | |
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213 | cphy_init(cphy, adapter, phy_addr, &mv88x201x_ops, mdio_ops); |
214 | ||
215 | /* Commands the PHY to enable XFP's clock. */ | |
216 | mdio_read(cphy, 0x3, 0x8300, &val); | |
217 | mdio_write(cphy, 0x3, 0x8300, val | 1); | |
218 | ||
219 | /* Clear link status. Required because of a bug in the PHY. */ | |
220 | mdio_read(cphy, 0x1, 0x8, &val); | |
221 | mdio_read(cphy, 0x3, 0x8, &val); | |
222 | ||
223 | /* Allows for Link,Ack LED turn on/off */ | |
224 | led_init(cphy); | |
225 | return cphy; | |
226 | } | |
227 | ||
228 | /* Chip Reset */ | |
229 | static int mv88x201x_phy_reset(adapter_t *adapter) | |
230 | { | |
231 | u32 val; | |
232 | ||
233 | t1_tpi_read(adapter, A_ELMER0_GPO, &val); | |
234 | val &= ~4; | |
235 | t1_tpi_write(adapter, A_ELMER0_GPO, val); | |
236 | msleep(100); | |
237 | ||
238 | t1_tpi_write(adapter, A_ELMER0_GPO, val | 4); | |
239 | msleep(1000); | |
240 | ||
241 | /* Now lets enable the Laser. Delay 100us */ | |
242 | t1_tpi_read(adapter, A_ELMER0_GPO, &val); | |
243 | val |= 0x8000; | |
244 | t1_tpi_write(adapter, A_ELMER0_GPO, val); | |
245 | udelay(100); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | struct gphy t1_mv88x201x_ops = { | |
250 | mv88x201x_phy_create, | |
251 | mv88x201x_phy_reset | |
252 | }; |