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-rw-r--r--arch/arm/mach-clps711x/mp1000-seprom.c195
1 files changed, 0 insertions, 195 deletions
diff --git a/arch/arm/mach-clps711x/mp1000-seprom.c b/arch/arm/mach-clps711x/mp1000-seprom.c
deleted file mode 100644
index b22d0bebb851..000000000000
--- a/arch/arm/mach-clps711x/mp1000-seprom.c
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@@ -1,195 +0,0 @@
1/*`
2 * mp1000-seprom.c
3 *
4 * This file contains the Serial EEPROM code for the MP1000 board
5 *
6 * Copyright (C) 2005 Comdial Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include <linux/kernel.h>
25#include <linux/init.h>
26#include <asm/hardware.h>
27#include <asm/hardware/clps7111.h>
28#include <asm/arch/mp1000-seprom.h>
29
30/* If SepromInit() can initialize and checksum the seprom successfully, */
31/* then it will point seprom_data_ptr at the shadow copy. */
32
33static eeprom_struct seprom_data; /* shadow copy of seprom content */
34
35eeprom_struct *seprom_data_ptr = 0; /* 0 => not initialized */
36
37/*
38 * Port D Bit 5 is Chip Select for EEPROM
39 * Port E Bit 0 is Input, Data out from EEPROM
40 * Port E Bit 1 is Output, Data in to EEPROM
41 * Port E Bit 2 is Output, CLK to EEPROM
42 */
43
44static char *port_d_ptr = (char *)(CLPS7111_VIRT_BASE + PDDR);
45static char *port_e_ptr = (char *)(CLPS7111_VIRT_BASE + PEDR);
46
47#define NO_OF_SHORTS 64 // Device is 64 x 16 bits
48#define ENABLE_RW 0
49#define DISABLE_RW 1
50
51static inline void toggle_seprom_clock(void)
52{
53 *port_e_ptr |= HwPortESepromCLK;
54 *port_e_ptr &= ~(HwPortESepromCLK);
55}
56
57static inline void select_eeprom(void)
58{
59 *port_d_ptr |= HwPortDEECS;
60 *port_e_ptr &= ~(HwPortESepromCLK);
61}
62
63static inline void deselect_eeprom(void)
64{
65 *port_d_ptr &= ~(HwPortDEECS);
66 *port_e_ptr &= ~(HwPortESepromDIn);
67}
68
69/*
70 * GetSepromDataPtr - returns pointer to shadow (RAM) copy of seprom
71 * and returns 0 if seprom is not initialized or
72 * has a checksum error.
73 */
74
75eeprom_struct* get_seprom_ptr(void)
76{
77 return seprom_data_ptr;
78}
79
80unsigned char* get_eeprom_mac_address(void)
81{
82 return seprom_data_ptr->variant.eprom_struct.mac_Address;
83}
84
85/*
86 * ReadSProm, Physically reads data from the Serial PROM
87 */
88static void read_sprom(short address, int length, eeprom_struct *buffer)
89{
90 short data = COMMAND_READ | (address & 0x3F);
91 short bit;
92 int i;
93
94 select_eeprom();
95
96 // Clock in 9 bits of the command
97 for (i = 0, bit = 0x100; i < 9; i++, bit >>= 1) {
98 if (data & bit)
99 *port_e_ptr |= HwPortESepromDIn;
100 else
101 *port_e_ptr &= ~(HwPortESepromDIn);
102
103 toggle_seprom_clock();
104 }
105
106 //
107 // Now read one or more shorts of data from the Seprom
108 //
109 while (length-- > 0) {
110 data = 0;
111
112 // Read 16 bits at a time
113 for (i = 0; i < 16; i++) {
114 data <<= 1;
115 toggle_seprom_clock();
116 data |= *port_e_ptr & HwPortESepromDOut;
117
118 }
119
120 buffer->variant.eprom_short_data[address++] = data;
121 }
122
123 deselect_eeprom();
124
125 return;
126}
127
128
129
130/*
131 * ReadSerialPROM
132 *
133 * Input: Pointer to array of 64 x 16 Bits
134 *
135 * Output: if no problem reading data is filled in
136 */
137static void read_serial_prom(eeprom_struct *data)
138{
139 read_sprom(0, 64, data);
140}
141
142
143//
144// Compute Serial EEPROM checksum
145//
146// Input: Pointer to struct with Eprom data
147//
148// Output: The computed Eprom checksum
149//
150static short compute_seprom_checksum(eeprom_struct *data)
151{
152 short checksum = 0;
153 int i;
154
155 for (i = 0; i < 126; i++) {
156 checksum += (short)data->variant.eprom_byte_data[i];
157 }
158
159 return((short)(0x5555 - (checksum & 0xFFFF)));
160}
161
162//
163// Make sure the data port bits for the SEPROM are correctly initialised
164//
165
166void __init seprom_init(void)
167{
168 short checksum;
169
170 // Init Port D
171 *(char *)(CLPS7111_VIRT_BASE + PDDDR) = 0x0;
172 *(char *)(CLPS7111_VIRT_BASE + PDDR) = 0x15;
173
174 // Init Port E
175 *(int *)(CLPS7111_VIRT_BASE + PEDDR) = 0x06;
176 *(int *)(CLPS7111_VIRT_BASE + PEDR) = 0x04;
177
178 //
179 // Make sure that EEPROM struct size never exceeds 128 bytes
180 //
181 if (sizeof(eeprom_struct) > 128) {
182 panic("Serial PROM struct size > 128, aborting read\n");
183 }
184
185 read_serial_prom(&seprom_data);
186
187 checksum = compute_seprom_checksum(&seprom_data);
188
189 if (checksum != seprom_data.variant.eprom_short_data[63]) {
190 panic("Serial EEPROM checksum failed\n");
191 }
192
193 seprom_data_ptr = &seprom_data;
194}
195
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