source: SVN/rincon/u-boot/board/eltec/bab7xx/dc_srom.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 22 months ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 7.1 KB
Line 
1/*
2 * (C) Copyright 2002 ELTEC Elektronik AG
3 * Frank Gottschling <fgottschling@eltec.de>
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (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,
21 * MA 02111-1307 USA
22 */
23
24/*
25 * SRom I/O routines.
26 */
27
28#include <common.h>
29#include <pci.h>
30#include "srom.h"
31
32#define SROM_RD         0x00004000    /* Read from Boot ROM */
33#define SROM_WR         0x00002000    /* Write to Boot ROM */
34#define SROM_SR         0x00000800    /* Select Serial ROM when set */
35
36#define DT_IN           0x00000004    /* Serial Data In */
37#define DT_CLK          0x00000002    /* Serial ROM Clock */
38#define DT_CS           0x00000001    /* Serial ROM Chip Select */
39
40static u_int         dc_srom_iobase;
41
42/*----------------------------------------------------------------------------*/
43
44static int inl(u_long addr)
45{
46    return le32_to_cpu(*(volatile u_long *)(addr));
47}
48
49/*----------------------------------------------------------------------------*/
50
51static void outl (int command, u_long addr)
52{
53    *(volatile u_long *)(addr) = cpu_to_le32(command);
54}
55
56/*----------------------------------------------------------------------------*/
57
58static void sendto_srom(u_int command, u_long addr)
59{
60    outl(command, addr);
61    udelay(1);
62
63    return;
64}
65
66/*----------------------------------------------------------------------------*/
67
68static int getfrom_srom(u_long addr)
69{
70    s32 tmp;
71
72    tmp = inl(addr);
73    udelay(1);
74
75    return tmp;
76}
77
78/*----------------------------------------------------------------------------*/
79
80static void srom_latch (u_int command, u_long addr)
81{
82    sendto_srom (command, addr);
83    sendto_srom (command | DT_CLK, addr);
84    sendto_srom (command, addr);
85
86    return;
87}
88
89/*----------------------------------------------------------------------------*/
90
91static void srom_command_rd (u_int command, u_long addr)
92{
93    srom_latch (command, addr);
94    srom_latch (command, addr);
95    srom_latch ((command & 0x0000ff00) | DT_CS, addr);
96
97    return;
98}
99
100/*----------------------------------------------------------------------------*/
101
102static void srom_command_wr (u_int command, u_long addr)
103{
104    srom_latch (command, addr);
105    srom_latch ((command & 0x0000ff00) | DT_CS, addr);
106    srom_latch (command, addr);
107
108    return;
109}
110
111/*----------------------------------------------------------------------------*/
112
113static void srom_address(u_int command, u_long addr, u_char offset)
114{
115    int i;
116    signed char a;
117
118    a = (char)(offset << 2);
119    for (i=0; i<6; i++, a <<= 1)
120    {
121        srom_latch(command | ((a < 0) ? DT_IN : 0), addr);
122    }
123    udelay(1);
124
125    i = (getfrom_srom(addr) >> 3) & 0x01;
126
127    return;
128}
129/*----------------------------------------------------------------------------*/
130
131static short srom_data_rd (u_int command, u_long addr)
132{
133    int i;
134    short word = 0;
135    s32 tmp;
136
137    for (i=0; i<16; i++)
138    {
139        sendto_srom(command  | DT_CLK, addr);
140        tmp = getfrom_srom(addr);
141        sendto_srom(command, addr);
142
143        word = (word << 1) | ((tmp >> 3) & 0x01);
144    }
145
146    sendto_srom(command & 0x0000ff00, addr);
147
148    return word;
149}
150
151/*----------------------------------------------------------------------------*/
152
153static int srom_data_wr (u_int command, u_long addr, short val)
154{
155    int i;
156    u_long longVal;
157    s32 tmp;
158
159    longVal = (u_long)(le16_to_cpu(val));
160
161    for (i=0; i<16; i++)
162    {
163        tmp = (longVal & 0x8000)>>13;
164
165        sendto_srom (tmp | command, addr);
166        sendto_srom (tmp | command  | DT_CLK, addr);
167        sendto_srom (tmp | command, addr);
168
169        longVal = longVal<<1;
170    }
171
172    sendto_srom(command & 0x0000ff00, addr);
173    sendto_srom(command, addr);
174
175    tmp = 100;
176    do
177    {
178        if ((getfrom_srom(dc_srom_iobase) & 0x8) == 0x8)
179            break;
180        udelay(1000);
181    } while (--tmp);
182
183    if (tmp == 0)
184    {
185        printf("Write DEC21143 SRom timed out !\n");
186        return (-1);
187    }
188
189    return 0;
190}
191
192
193/*----------------------------------------------------------------------------*/
194static short srom_rd (u_long addr, u_char offset)
195{
196    sendto_srom (SROM_RD | SROM_SR, addr);
197    srom_latch (SROM_RD | SROM_SR | DT_CS, addr);
198
199    srom_command_rd (SROM_RD | SROM_SR | DT_IN | DT_CS, addr);
200
201    srom_address (SROM_RD | SROM_SR | DT_CS, addr, offset);
202
203    return srom_data_rd (SROM_RD | SROM_SR | DT_CS, addr);
204}
205
206/*----------------------------------------------------------------------------*/
207
208static void srom_wr_enable (u_long addr)
209{
210    int i;
211
212    sendto_srom (SROM_WR | SROM_SR, addr);
213    srom_latch (SROM_WR | SROM_SR | DT_CS, addr);
214
215    srom_latch (SROM_WR | SROM_SR | DT_IN | DT_CS, addr);
216    srom_latch (SROM_WR | SROM_SR | DT_CS, addr);
217    srom_latch (SROM_WR | SROM_SR | DT_CS, addr);
218
219    for (i=0; i<6; i++)
220    {
221        srom_latch (SROM_WR | SROM_SR | DT_IN | DT_CS, addr);
222    }
223}
224
225/*----------------------------------------------------------------------------*/
226
227static int srom_wr (u_long addr, u_char offset, short val)
228{
229    srom_wr_enable (addr);
230
231    sendto_srom (SROM_WR | SROM_SR, addr);
232    srom_latch (SROM_WR | SROM_SR | DT_CS, addr);
233
234    srom_command_wr (SROM_WR | SROM_SR | DT_IN | DT_CS, addr);
235
236    srom_address (SROM_WR | SROM_SR | DT_CS, addr, offset);
237
238    return srom_data_wr (SROM_WR | SROM_SR | DT_CS, addr, val);
239}
240
241/*----------------------------------------------------------------------------*/
242/*
243 * load data from the srom
244 */
245int dc_srom_load (u_short *dest)
246{
247    int offset;
248    short tmp;
249
250    /* get srom iobase from local network controller */
251    pci_read_config_dword(PCI_BDF(0,14,0), PCI_BASE_ADDRESS_1, &dc_srom_iobase);
252    dc_srom_iobase &= PCI_BASE_ADDRESS_MEM_MASK;
253    dc_srom_iobase  = pci_mem_to_phys(PCI_BDF(0,14,0), dc_srom_iobase);
254    dc_srom_iobase += 0x48;            /* io offset for srom access */
255
256    memset (dest, 0, 128);
257    for (offset=0; offset<64; offset++)
258    {
259        tmp = srom_rd (dc_srom_iobase, offset);
260        *dest++ = le16_to_cpu(tmp);
261    }
262
263    return (0);
264}
265
266/*----------------------------------------------------------------------------*/
267
268/*
269 * store data into the srom
270 */
271int dc_srom_store (u_short *src)
272{
273    int offset;
274
275    /* get srom iobase from local network controller */
276    pci_read_config_dword(PCI_BDF(0,14,0), PCI_BASE_ADDRESS_1, &dc_srom_iobase);
277    dc_srom_iobase &= PCI_BASE_ADDRESS_MEM_MASK;
278    dc_srom_iobase  = pci_mem_to_phys(PCI_BDF(0,14,0), dc_srom_iobase);
279    dc_srom_iobase += 0x48;            /* io offset for srom access */
280
281    for (offset=0; offset<64; offset++)
282    {
283        if (srom_wr (dc_srom_iobase, offset, *src) == -1)
284                return (-1);
285        src++;
286    }
287
288    return (0);
289}
290
291/*----------------------------------------------------------------------------*/
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