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diff --git a/drivers/net/wireless/bcmdhd/hndpmu.c b/drivers/net/wireless/bcmdhd/hndpmu.c
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1/*
2 * Misc utility routines for accessing PMU corerev specific features
3 * of the SiliconBackplane-based Broadcom chips.
4 *
5 * Copyright (C) 1999-2011, Broadcom Corporation
6 *
7 * Unless you and Broadcom execute a separate written software license
8 * agreement governing use of this software, this software is licensed to you
9 * under the terms of the GNU General Public License version 2 (the "GPL"),
10 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
11 * following added to such license:
12 *
13 * As a special exception, the copyright holders of this software give you
14 * permission to link this software with independent modules, and to copy and
15 * distribute the resulting executable under terms of your choice, provided that
16 * you also meet, for each linked independent module, the terms and conditions of
17 * the license of that module. An independent module is a module which is not
18 * derived from this software. The special exception does not apply to any
19 * modifications of the software.
20 *
21 * Notwithstanding the above, under no circumstances may you combine this
22 * software in any way with any other Broadcom software provided under a license
23 * other than the GPL, without Broadcom's express prior written consent.
24 *
25 * $Id: hndpmu.c,v 1.228.2.56 2011-02-11 22:49:07 Exp $
26 */
27
28#include <typedefs.h>
29#include <bcmdefs.h>
30#include <osl.h>
31#include <bcmutils.h>
32#include <siutils.h>
33#include <bcmdevs.h>
34#include <hndsoc.h>
35#include <sbchipc.h>
36#include <hndpmu.h>
37
38#define PMU_ERROR(args)
39
40#define PMU_MSG(args)
41
42/* To check in verbose debugging messages not intended
43 * to be on except on private builds.
44 */
45#define PMU_NONE(args)
46
47
48/* SDIO Pad drive strength to select value mappings.
49 * The last strength value in each table must be 0 (the tri-state value).
50 */
51typedef struct {
52 uint8 strength; /* Pad Drive Strength in mA */
53 uint8 sel; /* Chip-specific select value */
54} sdiod_drive_str_t;
55
56/* SDIO Drive Strength to sel value table for PMU Rev 1 */
57static const sdiod_drive_str_t sdiod_drive_strength_tab1[] = {
58 {4, 0x2},
59 {2, 0x3},
60 {1, 0x0},
61 {0, 0x0} };
62
63/* SDIO Drive Strength to sel value table for PMU Rev 2, 3 */
64static const sdiod_drive_str_t sdiod_drive_strength_tab2[] = {
65 {12, 0x7},
66 {10, 0x6},
67 {8, 0x5},
68 {6, 0x4},
69 {4, 0x2},
70 {2, 0x1},
71 {0, 0x0} };
72
73/* SDIO Drive Strength to sel value table for PMU Rev 8 (1.8V) */
74static const sdiod_drive_str_t sdiod_drive_strength_tab3[] = {
75 {32, 0x7},
76 {26, 0x6},
77 {22, 0x5},
78 {16, 0x4},
79 {12, 0x3},
80 {8, 0x2},
81 {4, 0x1},
82 {0, 0x0} };
83
84/* SDIO Drive Strength to sel value table for PMU Rev 11 (1.8v) */
85static const sdiod_drive_str_t sdiod_drive_strength_tab4_1v8[] = {
86 {32, 0x6},
87 {26, 0x7},
88 {22, 0x4},
89 {16, 0x5},
90 {12, 0x2},
91 {8, 0x3},
92 {4, 0x0},
93 {0, 0x1} };
94
95/* SDIO Drive Strength to sel value table for PMU Rev 11 (1.2v) */
96static const sdiod_drive_str_t sdiod_drive_strength_tab4_1v2[] = {
97 {16, 0x3},
98 {13, 0x2},
99 {11, 0x1},
100 {8, 0x0},
101 {6, 0x7},
102 {4, 0x6},
103 {2, 0x5},
104 {0, 0x4} };
105
106/* SDIO Drive Strength to sel value table for PMU Rev 11 (2.5v) */
107static const sdiod_drive_str_t sdiod_drive_strength_tab4_2v5[] = {
108 {80, 0x5},
109 {65, 0x4},
110 {55, 0x7},
111 {40, 0x6},
112 {30, 0x1},
113 {20, 0x0},
114 {10, 0x3},
115 {0, 0x2} };
116
117/* SDIO Drive Strength to sel value table for PMU Rev 13 (1.8v) */
118static const sdiod_drive_str_t sdiod_drive_strength_tab5_1v8[] = {
119 {6, 0x7},
120 {5, 0x6},
121 {4, 0x5},
122 {3, 0x4},
123 {2, 0x2},
124 {1, 0x1},
125 {0, 0x0} };
126
127/* SDIO Drive Strength to sel value table for PMU Rev 13 (3.3v) */
128static const sdiod_drive_str_t sdiod_drive_strength_tab5_3v3[] = {
129 {12, 0x7},
130 {10, 0x6},
131 {8, 0x5},
132 {6, 0x4},
133 {4, 0x2},
134 {2, 0x1},
135 {0, 0x0} };
136
137
138#define SDIOD_DRVSTR_KEY(chip, pmu) (((chip) << 16) | (pmu))
139
140void
141si_sdiod_drive_strength_init(si_t *sih, osl_t *osh, uint32 drivestrength)
142{
143 chipcregs_t *cc;
144 uint origidx, intr_val = 0;
145 sdiod_drive_str_t *str_tab = NULL;
146 uint32 str_mask = 0;
147 uint32 str_shift = 0;
148
149 if (!(sih->cccaps & CC_CAP_PMU)) {
150 return;
151 }
152
153 /* Remember original core before switch to chipc */
154 cc = (chipcregs_t *) si_switch_core(sih, CC_CORE_ID, &origidx, &intr_val);
155
156 switch (SDIOD_DRVSTR_KEY(sih->chip, sih->pmurev)) {
157 case SDIOD_DRVSTR_KEY(BCM4325_CHIP_ID, 1):
158 str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab1;
159 str_mask = 0x30000000;
160 str_shift = 28;
161 break;
162 case SDIOD_DRVSTR_KEY(BCM4325_CHIP_ID, 2):
163 case SDIOD_DRVSTR_KEY(BCM4325_CHIP_ID, 3):
164 case SDIOD_DRVSTR_KEY(BCM4315_CHIP_ID, 4):
165 str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab2;
166 str_mask = 0x00003800;
167 str_shift = 11;
168 break;
169 case SDIOD_DRVSTR_KEY(BCM4336_CHIP_ID, 8):
170 case SDIOD_DRVSTR_KEY(BCM4336_CHIP_ID, 11):
171 if (sih->pmurev == 8) {
172 str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab3;
173 }
174 else if (sih->pmurev == 11) {
175 str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab4_1v8;
176 }
177 str_mask = 0x00003800;
178 str_shift = 11;
179 break;
180 case SDIOD_DRVSTR_KEY(BCM4330_CHIP_ID, 12):
181 str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab4_1v8;
182 str_mask = 0x00003800;
183 str_shift = 11;
184 break;
185 case SDIOD_DRVSTR_KEY(BCM43362_CHIP_ID, 13):
186 str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab5_1v8;
187 str_mask = 0x00003800;
188 str_shift = 11;
189 break;
190 default:
191 PMU_MSG(("No SDIO Drive strength init done for chip %s rev %d pmurev %d\n",
192 bcm_chipname(sih->chip, chn, 8), sih->chiprev, sih->pmurev));
193
194 break;
195 }
196
197 if (str_tab != NULL) {
198 uint32 cc_data_temp;
199 int i;
200
201 /* Pick the lowest available drive strength equal or greater than the
202 * requested strength. Drive strength of 0 requests tri-state.
203 */
204 for (i = 0; drivestrength < str_tab[i].strength; i++)
205 ;
206
207 if (i > 0 && drivestrength > str_tab[i].strength)
208 i--;
209
210 W_REG(osh, &cc->chipcontrol_addr, 1);
211 cc_data_temp = R_REG(osh, &cc->chipcontrol_data);
212 cc_data_temp &= ~str_mask;
213 cc_data_temp |= str_tab[i].sel << str_shift;
214 W_REG(osh, &cc->chipcontrol_data, cc_data_temp);
215
216 PMU_MSG(("SDIO: %dmA drive strength requested; set to %dmA\n",
217 drivestrength, str_tab[i].strength));
218 }
219
220 /* Return to original core */
221 si_restore_core(sih, origidx, intr_val);
222}
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