1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
* QLogic iSCSI HBA Driver
* Copyright (c) 2003-2010 QLogic Corporation
*
* See LICENSE.qla4xxx for copyright and licensing details.
*/
#include "ql4_def.h"
#include "ql4_glbl.h"
#include "ql4_dbg.h"
#include "ql4_inline.h"
static inline void eeprom_cmd(uint32_t cmd, struct scsi_qla_host *ha)
{
writel(cmd, isp_nvram(ha));
readl(isp_nvram(ha));
udelay(1);
}
static inline int eeprom_size(struct scsi_qla_host *ha)
{
return is_qla4010(ha) ? FM93C66A_SIZE_16 : FM93C86A_SIZE_16;
}
static inline int eeprom_no_addr_bits(struct scsi_qla_host *ha)
{
return is_qla4010(ha) ? FM93C56A_NO_ADDR_BITS_16 :
FM93C86A_NO_ADDR_BITS_16 ;
}
static inline int eeprom_no_data_bits(struct scsi_qla_host *ha)
{
return FM93C56A_DATA_BITS_16;
}
static int fm93c56a_select(struct scsi_qla_host * ha)
{
DEBUG5(printk(KERN_ERR "fm93c56a_select:\n"));
ha->eeprom_cmd_data = AUBURN_EEPROM_CS_1 | 0x000f0000;
eeprom_cmd(ha->eeprom_cmd_data, ha);
return 1;
}
static int fm93c56a_cmd(struct scsi_qla_host * ha, int cmd, int addr)
{
int i;
int mask;
int dataBit;
int previousBit;
/* Clock in a zero, then do the start bit. */
eeprom_cmd(ha->eeprom_cmd_data | AUBURN_EEPROM_DO_1, ha);
eeprom_cmd(ha->eeprom_cmd_data | AUBURN_EEPROM_DO_1 |
AUBURN_EEPROM_CLK_RISE, ha);
eeprom_cmd(ha->eeprom_cmd_data | AUBURN_EEPROM_DO_1 |
AUBURN_EEPROM_CLK_FALL, ha);
mask = 1 << (FM93C56A_CMD_BITS - 1);
/* Force the previous data bit to be different. */
previousBit = 0xffff;
for (i = 0; i < FM93C56A_CMD_BITS; i++) {
dataBit =
(cmd & mask) ? AUBURN_EEPROM_DO_1 : AUBURN_EEPROM_DO_0;
if (previousBit != dataBit) {
/*
* If the bit changed, then change the DO state to
* match.
*/
eeprom_cmd(ha->eeprom_cmd_data | dataBit, ha);
previousBit = dataBit;
}
eeprom_cmd(ha->eeprom_cmd_data | dataBit |
AUBURN_EEPROM_CLK_RISE, ha);
eeprom_cmd(ha->eeprom_cmd_data | dataBit |
AUBURN_EEPROM_CLK_FALL, ha);
cmd = cmd << 1;
}
mask = 1 << (eeprom_no_addr_bits(ha) - 1);
/* Force the previous data bit to be different. */
previousBit = 0xffff;
for (i = 0; i < eeprom_no_addr_bits(ha); i++) {
dataBit = addr & mask ? AUBURN_EEPROM_DO_1 :
AUBURN_EEPROM_DO_0;
if (previousBit != dataBit) {
/*
* If the bit changed, then change the DO state to
* match.
*/
eeprom_cmd(ha->eeprom_cmd_data | dataBit, ha);
previousBit = dataBit;
}
eeprom_cmd(ha->eeprom_cmd_data | dataBit |
AUBURN_EEPROM_CLK_RISE, ha);
eeprom_cmd(ha->eeprom_cmd_data | dataBit |
AUBURN_EEPROM_CLK_FALL, ha);
addr = addr << 1;
}
return 1;
}
static int fm93c56a_deselect(struct scsi_qla_host * ha)
{
ha->eeprom_cmd_data = AUBURN_EEPROM_CS_0 | 0x000f0000;
eeprom_cmd(ha->eeprom_cmd_data, ha);
return 1;
}
static int fm93c56a_datain(struct scsi_qla_host * ha, unsigned short *value)
{
int i;
int data = 0;
int dataBit;
/* Read the data bits
* The first bit is a dummy. Clock right over it. */
for (i = 0; i < eeprom_no_data_bits(ha); i++) {
eeprom_cmd(ha->eeprom_cmd_data |
AUBURN_EEPROM_CLK_RISE, ha);
eeprom_cmd(ha->eeprom_cmd_data |
AUBURN_EEPROM_CLK_FALL, ha);
dataBit = (readw(isp_nvram(ha)) & AUBURN_EEPROM_DI_1) ? 1 : 0;
data = (data << 1) | dataBit;
}
*value = data;
return 1;
}
static int eeprom_readword(int eepromAddr, u16 * value,
struct scsi_qla_host * ha)
{
fm93c56a_select(ha);
fm93c56a_cmd(ha, FM93C56A_READ, eepromAddr);
fm93c56a_datain(ha, value);
fm93c56a_deselect(ha);
return 1;
}
/* Hardware_lock must be set before calling */
u16 rd_nvram_word(struct scsi_qla_host * ha, int offset)
{
u16 val = 0;
/* NOTE: NVRAM uses half-word addresses */
eeprom_readword(offset, &val, ha);
return val;
}
int qla4xxx_is_nvram_configuration_valid(struct scsi_qla_host * ha)
{
int status = QLA_ERROR;
uint16_t checksum = 0;
uint32_t index;
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
for (index = 0; index < eeprom_size(ha); index++)
checksum += rd_nvram_word(ha, index);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (checksum == 0)
status = QLA_SUCCESS;
return status;
}
/*************************************************************************
*
* Hardware Semaphore routines
*
*************************************************************************/
int ql4xxx_sem_spinlock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits)
{
uint32_t value;
unsigned long flags;
unsigned int seconds = 30;
DEBUG2(printk("scsi%ld : Trying to get SEM lock - mask= 0x%x, code = "
"0x%x\n", ha->host_no, sem_mask, sem_bits));
do {
spin_lock_irqsave(&ha->hardware_lock, flags);
writel((sem_mask | sem_bits), isp_semaphore(ha));
value = readw(isp_semaphore(ha));
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if ((value & (sem_mask >> 16)) == sem_bits) {
DEBUG2(printk("scsi%ld : Got SEM LOCK - mask= 0x%x, "
"code = 0x%x\n", ha->host_no,
sem_mask, sem_bits));
return QLA_SUCCESS;
}
ssleep(1);
} while (--seconds);
return QLA_ERROR;
}
void ql4xxx_sem_unlock(struct scsi_qla_host * ha, u32 sem_mask)
{
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
writel(sem_mask, isp_semaphore(ha));
readl(isp_semaphore(ha));
spin_unlock_irqrestore(&ha->hardware_lock, flags);
DEBUG2(printk("scsi%ld : UNLOCK SEM - mask= 0x%x\n", ha->host_no,
sem_mask));
}
int ql4xxx_sem_lock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits)
{
uint32_t value;
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
writel((sem_mask | sem_bits), isp_semaphore(ha));
value = readw(isp_semaphore(ha));
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if ((value & (sem_mask >> 16)) == sem_bits) {
DEBUG2(printk("scsi%ld : Got SEM LOCK - mask= 0x%x, code = "
"0x%x, sema code=0x%x\n", ha->host_no,
sem_mask, sem_bits, value));
return 1;
}
return 0;
}
|
