blob: 6ab277aa147fe3d9cb68b9743e014725572dea4b [file] [log] [blame]
Peter Stugebf196e92009-01-26 03:08:45 +00001/*
2 * This file is part of the flashrom project.
3 *
4 * Copyright (C) 2008 Peter Stuge <peter@stuge.se>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20#include <stdio.h>
21#include <pci/pci.h>
22#include <stdint.h>
23#include <string.h>
24#include "flash.h"
25#include "spi.h"
26
27#define WBSIO_PORT1 0x2e
28#define WBSIO_PORT2 0x4e
29
30static uint16_t wbsio_spibase = 0;
31
Uwe Hermann7b2969b2009-04-15 10:52:49 +000032static uint16_t wbsio_get_spibase(uint16_t port)
33{
Peter Stugebf196e92009-01-26 03:08:45 +000034 uint8_t id;
35 uint16_t flashport = 0;
36
37 w836xx_ext_enter(port);
38 id = wbsio_read(port, 0x20);
Uwe Hermann7b2969b2009-04-15 10:52:49 +000039 if (id != 0xa0) {
Peter Stugebf196e92009-01-26 03:08:45 +000040 fprintf(stderr, "\nW83627 not found at 0x%x, id=0x%02x want=0xa0.\n", port, id);
41 goto done;
42 }
43
44 if (0 == (wbsio_read(port, 0x24) & 2)) {
45 fprintf(stderr, "\nW83627 found at 0x%x, but SPI pins are not enabled. (CR[0x24] bit 1=0)\n", port);
46 goto done;
47 }
48
49 wbsio_write(port, 0x07, 0x06);
50 if (0 == (wbsio_read(port, 0x30) & 1)) {
51 fprintf(stderr, "\nW83627 found at 0x%x, but SPI is not enabled. (LDN6[0x30] bit 0=0)\n", port);
52 goto done;
53 }
54
55 flashport = (wbsio_read(port, 0x62) << 8) | wbsio_read(port, 0x63);
56
57done:
58 w836xx_ext_leave(port);
59 return flashport;
60}
61
Uwe Hermann7b2969b2009-04-15 10:52:49 +000062int wbsio_check_for_spi(const char *name)
63{
Peter Stugebf196e92009-01-26 03:08:45 +000064 if (0 == (wbsio_spibase = wbsio_get_spibase(WBSIO_PORT1)))
65 if (0 == (wbsio_spibase = wbsio_get_spibase(WBSIO_PORT2)))
66 return 1;
67
68 printf_debug("\nwbsio_spibase = 0x%x\n", wbsio_spibase);
69 flashbus = BUS_TYPE_WBSIO_SPI;
70 return 0;
71}
72
73/* W83627DHG has 11 command modes:
74 * 1=1 command only
75 * 2=1 command+1 data write
76 * 3=1 command+2 data read
77 * 4=1 command+3 address
78 * 5=1 command+3 address+1 data write
79 * 6=1 command+3 address+4 data write
80 * 7=1 command+3 address+1 dummy address inserted by wbsio+4 data read
81 * 8=1 command+3 address+1 data read
82 * 9=1 command+3 address+2 data read
83 * a=1 command+3 address+3 data read
84 * b=1 command+3 address+4 data read
85 *
86 * mode[7:4] holds the command mode
87 * mode[3:0] holds SPI address bits [19:16]
88 *
89 * The Winbond SPI master only supports 20 bit addresses on the SPI bus. :\
90 * Would one more byte of RAM in the chip (to get all 24 bits) really make
91 * such a big difference?
92 */
Uwe Hermann7b2969b2009-04-15 10:52:49 +000093int wbsio_spi_command(unsigned int writecnt, unsigned int readcnt,
94 const unsigned char *writearr, unsigned char *readarr)
95{
Peter Stugebf196e92009-01-26 03:08:45 +000096 int i;
97 uint8_t mode = 0;
98
99 printf_debug("%s:", __func__);
100
101 if (1 == writecnt && 0 == readcnt) {
102 mode = 0x10;
103 } else if (2 == writecnt && 0 == readcnt) {
104 OUTB(writearr[1], wbsio_spibase + 4);
105 printf_debug(" data=0x%02x", writearr[1]);
106 mode = 0x20;
107 } else if (1 == writecnt && 2 == readcnt) {
108 mode = 0x30;
109 } else if (4 == writecnt && 0 == readcnt) {
110 printf_debug(" addr=0x%02x", (writearr[1] & 0x0f));
111 for (i = 2; i < writecnt; i++) {
112 OUTB(writearr[i], wbsio_spibase + i);
113 printf_debug("%02x", writearr[i]);
114 }
115 mode = 0x40 | (writearr[1] & 0x0f);
116 } else if (5 == writecnt && 0 == readcnt) {
117 printf_debug(" addr=0x%02x", (writearr[1] & 0x0f));
118 for (i = 2; i < 4; i++) {
119 OUTB(writearr[i], wbsio_spibase + i);
120 printf_debug("%02x", writearr[i]);
121 }
122 OUTB(writearr[i], wbsio_spibase + i);
123 printf_debug(" data=0x%02x", writearr[i]);
124 mode = 0x50 | (writearr[1] & 0x0f);
125 } else if (8 == writecnt && 0 == readcnt) {
126 printf_debug(" addr=0x%02x", (writearr[1] & 0x0f));
127 for (i = 2; i < 4; i++) {
128 OUTB(writearr[i], wbsio_spibase + i);
129 printf_debug("%02x", writearr[i]);
130 }
131 printf_debug(" data=0x");
132 for (; i < writecnt; i++) {
133 OUTB(writearr[i], wbsio_spibase + i);
134 printf_debug("%02x", writearr[i]);
135 }
136 mode = 0x60 | (writearr[1] & 0x0f);
137 } else if (5 == writecnt && 4 == readcnt) {
138 /* XXX: TODO not supported by flashrom infrastructure!
139 * This mode, 7, discards the fifth byte in writecnt,
140 * but since we can not express that in flashrom, fail
141 * the operation for now.
142 */
143 ;
144 } else if (4 == writecnt && readcnt >= 1 && readcnt <= 4) {
145 printf_debug(" addr=0x%02x", (writearr[1] & 0x0f));
146 for (i = 2; i < writecnt; i++) {
147 OUTB(writearr[i], wbsio_spibase + i);
148 printf_debug("%02x", writearr[i]);
149 }
150 mode = ((7 + readcnt) << 4) | (writearr[1] & 0x0f);
151 }
152 printf_debug(" cmd=%02x mode=%02x\n", writearr[0], mode);
153
154 if (!mode) {
155 fprintf(stderr, "%s: unsupported command type wr=%d rd=%d\n",
156 __func__, writecnt, readcnt);
157 return 1;
158 }
159
160 OUTB(writearr[0], wbsio_spibase);
161 OUTB(mode, wbsio_spibase + 1);
162 myusec_delay(10);
163
164 if (!readcnt)
165 return 0;
166
167 printf_debug("%s: returning data =", __func__);
168 for (i = 0; i < readcnt; i++) {
169 readarr[i] = INB(wbsio_spibase + 4 + i);
170 printf_debug(" 0x%02x", readarr[i]);
171 }
172 printf_debug("\n");
173 return 0;
174}
175
Uwe Hermann7b2969b2009-04-15 10:52:49 +0000176int wbsio_spi_read(struct flashchip *flash, uint8_t *buf)
177{
Peter Stugebf196e92009-01-26 03:08:45 +0000178 int size = flash->total_size * 1024;
179
180 if (flash->total_size > 1024) {
181 fprintf(stderr, "%s: Winbond saved on 4 register bits so max chip size is 1024 KB!\n", __func__);
182 return 1;
183 }
184
185 memcpy(buf, (const char *)flash->virtual_memory, size);
186 return 0;
187}
188
Uwe Hermann7b2969b2009-04-15 10:52:49 +0000189int wbsio_spi_write(struct flashchip *flash, uint8_t *buf)
190{
Peter Stugebf196e92009-01-26 03:08:45 +0000191 int pos, size = flash->total_size * 1024;
Carl-Daniel Hailfinger03adbe12009-05-09 02:09:45 +0000192 int result;
Peter Stugebf196e92009-01-26 03:08:45 +0000193
194 if (flash->total_size > 1024) {
195 fprintf(stderr, "%s: Winbond saved on 4 register bits so max chip size is 1024 KB!\n", __func__);
196 return 1;
197 }
198
199 flash->erase(flash);
Carl-Daniel Hailfinger03adbe12009-05-09 02:09:45 +0000200 result = spi_write_enable();
201 if (result)
202 return result;
Peter Stugebf196e92009-01-26 03:08:45 +0000203 for (pos = 0; pos < size; pos++) {
204 spi_byte_program(pos, buf[pos]);
205 while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP)
206 myusec_delay(10);
207 }
208 spi_write_disable();
209 return 0;
210}