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i2c: Drop use of CONFIG_I2C_HARD
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86b116b1
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1/*
2 * (C) Copyright 2003-2007
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * (C) Copyright 2004
6 * Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
7 *
8 * (C) Copyright 2004-2005
9 * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
10 *
11 * Adapted to U-Boot 1.2 by:
12 * Bartlomiej Sieka <tur@semihalf.com>:
13 * - HW ID readout from EEPROM
14 * - module detection
15 * Grzegorz Bernacki <gjb@semihalf.com>:
16 * - run-time SDRAM controller configuration
17 * - LIBFDT support
18 *
3765b3e7 19 * SPDX-License-Identifier: GPL-2.0+
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20 */
21
22#include <common.h>
23#include <mpc5xxx.h>
24#include <pci.h>
25#include <asm/processor.h>
26#include <i2c.h>
27#include <linux/ctype.h>
28
29#ifdef CONFIG_OF_LIBFDT
30#include <libfdt.h>
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31#include <fdt_support.h>
32#endif /* CONFIG_OF_LIBFDT */
33
34
35#include "cm5200.h"
36#include "fwupdate.h"
37
38DECLARE_GLOBAL_DATA_PTR;
39
40static hw_id_t hw_id;
41
42
6d0f6bcf 43#ifndef CONFIG_SYS_RAMBOOT
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44/*
45 * Helper function to initialize SDRAM controller.
46 */
47static void sdram_start(int hi_addr, mem_conf_t *mem_conf)
48{
49 long hi_addr_bit = hi_addr ? 0x01000000 : 0;
50
51 /* unlock mode register */
52 *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000000 |
53 hi_addr_bit;
54
55 /* precharge all banks */
56 *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000002 |
57 hi_addr_bit;
58
59 /* auto refresh */
60 *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000004 |
61 hi_addr_bit;
62
63 /* auto refresh, second time */
64 *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000004 |
65 hi_addr_bit;
66
67 /* set mode register */
68 *(vu_long *)MPC5XXX_SDRAM_MODE = mem_conf->mode;
69
70 /* normal operation */
71 *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | hi_addr_bit;
72}
6d0f6bcf 73#endif /* CONFIG_SYS_RAMBOOT */
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74
75
76/*
77 * Retrieve memory configuration for a given module. board_type is the index
78 * in hw_id_list[] corresponding to the module we are executing on; we return
79 * SDRAM controller settings approprate for this module.
80 */
81static mem_conf_t* get_mem_config(int board_type)
82{
83 switch(board_type){
84 case CM1_QA:
85 return memory_config[0];
86 case CM11_QA:
87 case CMU1_QA:
88 return memory_config[1];
89 default:
90 printf("ERROR: Unknown module, using a default SDRAM "
91 "configuration - things may not work!!!.\n");
92 return memory_config[0];
93 }
94}
95
96
97/*
98 * Initalize SDRAM - configure SDRAM controller, detect memory size.
99 */
f1683aa7 100int dram_init(void)
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101{
102 ulong dramsize = 0;
6d0f6bcf 103#ifndef CONFIG_SYS_RAMBOOT
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104 ulong test1, test2;
105 mem_conf_t *mem_conf;
106
52c41180 107 mem_conf = get_mem_config(gd->board_type);
be5d72d1 108
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109 /* configure SDRAM start/end for detection */
110 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e; /* 2G at 0x0 */
111
112 /* setup config registers */
113 *(vu_long *)MPC5XXX_SDRAM_CONFIG1 = mem_conf->config1;
114 *(vu_long *)MPC5XXX_SDRAM_CONFIG2 = mem_conf->config2;
115
116 sdram_start(0, mem_conf);
6d0f6bcf 117 test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
86b116b1 118 sdram_start(1, mem_conf);
6d0f6bcf 119 test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
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120 if (test1 > test2) {
121 sdram_start(0, mem_conf);
122 dramsize = test1;
123 } else
124 dramsize = test2;
125
126 /* memory smaller than 1MB is impossible */
127 if (dramsize < (1 << 20))
128 dramsize = 0;
129
130 /* set SDRAM CS0 size according to the amount of RAM found */
131 if (dramsize > 0) {
132 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 +
133 __builtin_ffs(dramsize >> 20) - 1;
134 } else
135 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
6d0f6bcf 136#else /* CONFIG_SYS_RAMBOOT */
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137 /* retrieve size of memory connected to SDRAM CS0 */
138 dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
139 if (dramsize >= 0x13)
140 dramsize = (1 << (dramsize - 0x13)) << 20;
141 else
142 dramsize = 0;
6d0f6bcf 143#endif /* !CONFIG_SYS_RAMBOOT */
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144
145 /*
146 * On MPC5200B we need to set the special configuration delay in the
147 * DDR controller. Refer to chapter 8.7.5 SDelay--MBAR + 0x0190 of
148 * the MPC5200B User's Manual.
149 */
150 *(vu_long *)MPC5XXX_SDRAM_SDELAY = 0x04;
151 __asm__ volatile ("sync");
152
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153 gd->ram_size = dramsize;
154
155 return 0;
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156}
157
158
159/*
160 * Read module hardware identification data from the I2C EEPROM.
161 */
162static void read_hw_id(hw_id_t hw_id)
163{
eb5ba3ae 164 printf("ERROR: can't read HW ID from EEPROM\n");
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165}
166
167
168/*
169 * Identify module we are running on, set gd->board_type to the index in
170 * hw_id_list[] corresponding to the module identifed, or to
171 * CM5200_UNKNOWN_MODULE if we can't identify the module.
172 */
173static void identify_module(hw_id_t hw_id)
174{
175 int i, j, element;
176 char match;
177 gd->board_type = CM5200_UNKNOWN_MODULE;
178 for (i = 0; i < sizeof (hw_id_list) / sizeof (char **); ++i) {
179 match = 1;
180 for (j = 0; j < sizeof (hw_id_identify) / sizeof (int); ++j) {
181 element = hw_id_identify[j];
182 if (strncmp(hw_id_list[i][element],
183 &hw_id[element][0],
184 hw_id_format[element].length) != 0) {
185 match = 0;
186 break;
187 }
188 }
189 if (match) {
190 gd->board_type = i;
191 break;
192 }
193 }
194}
195
196
197/*
198 * Compose string with module name.
199 * buf is assumed to have enough space, and be null-terminated.
200 */
201static void compose_module_name(hw_id_t hw_id, char *buf)
202{
203 char tmp[MODULE_NAME_MAXLEN];
204 strncat(buf, &hw_id[PCB_NAME][0], hw_id_format[PCB_NAME].length);
205 strncat(buf, ".", 1);
206 strncat(buf, &hw_id[FORM][0], hw_id_format[FORM].length);
207 strncat(buf, &hw_id[VERSION][0], hw_id_format[VERSION].length);
208 strncat(buf, " (", 2);
209 strncat(buf, &hw_id[IDENTIFICATION_NUMBER][0],
210 hw_id_format[IDENTIFICATION_NUMBER].length);
211 sprintf(tmp, " / %u.%u)",
212 hw_id[MAJOR_SW_VERSION][0],
213 hw_id[MINOR_SW_VERSION][0]);
214 strcat(buf, tmp);
215}
216
eb5ba3ae 217#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C_SOFT)
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218/*
219 * Compose string with hostname.
220 * buf is assumed to have enough space, and be null-terminated.
221 */
222static void compose_hostname(hw_id_t hw_id, char *buf)
223{
224 char *p;
225 strncat(buf, &hw_id[PCB_NAME][0], hw_id_format[PCB_NAME].length);
226 strncat(buf, "_", 1);
227 strncat(buf, &hw_id[FORM][0], hw_id_format[FORM].length);
228 strncat(buf, &hw_id[VERSION][0], hw_id_format[VERSION].length);
229 for (p = buf; *p; ++p)
230 *p = tolower(*p);
231
232}
eb5ba3ae 233#endif
86b116b1 234
7ffe3cd6 235#ifdef CONFIG_OF_BOARD_SETUP
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236/*
237 * Update 'model' and 'memory' properties in the blob according to the module
238 * that we are running on.
239 */
240static void ft_blob_update(void *blob, bd_t *bd)
241{
242 int len, ret, nodeoffset = 0;
243 char module_name[MODULE_NAME_MAXLEN] = {0};
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244
245 compose_module_name(hw_id, module_name);
246 len = strlen(module_name) + 1;
247
248 ret = fdt_setprop(blob, nodeoffset, "model", module_name, len);
249 if (ret < 0)
250 printf("ft_blob_update(): cannot set /model property err:%s\n",
251 fdt_strerror(ret));
86b116b1 252}
7ffe3cd6 253#endif /* CONFIG_OF_BOARD_SETUP */
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254
255
256/*
257 * Read HW ID from I2C EEPROM and detect the modue we are running on. Note
258 * that we need to use local variable for readout, because global data is not
259 * writable yet (and we'll have to redo the readout later on).
260 */
261int checkboard(void)
262{
263 hw_id_t hw_id_tmp;
264 char module_name_tmp[MODULE_NAME_MAXLEN] = "";
265
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266 read_hw_id(hw_id_tmp);
267 identify_module(hw_id_tmp); /* this sets gd->board_type */
268 compose_module_name(hw_id_tmp, module_name_tmp);
269
270 if (gd->board_type != CM5200_UNKNOWN_MODULE)
271 printf("Board: %s\n", module_name_tmp);
272 else
273 printf("Board: unrecognized cm5200 module (%s)\n",
274 module_name_tmp);
be5d72d1 275
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276 return 0;
277}
278
279
280int board_early_init_r(void)
281{
282 /*
283 * Now, when we are in RAM, enable flash write access for detection
284 * process. Note that CS_BOOT cannot be cleared when executing in
285 * flash.
286 */
287 *(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
288
289 /* Now that we can write to global data, read HW ID again. */
290 read_hw_id(hw_id);
291 return 0;
292}
293
294
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295#ifdef CONFIG_MISC_INIT_R
296int misc_init_r(void)
297{
ea818dbb 298#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C_SOFT)
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299 uchar buf[6];
300 char str[18];
301 char hostname[MODULE_NAME_MAXLEN];
302
303 /* Read ethaddr from EEPROM */
6d0f6bcf 304 if (i2c_read(CONFIG_SYS_I2C_EEPROM, CONFIG_MAC_OFFSET, 2, buf, 6) == 0) {
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305 sprintf(str, "%02X:%02X:%02X:%02X:%02X:%02X",
306 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
307 /* Check if MAC addr is owned by Schindler */
308 if (strstr(str, "00:06:C3") != str)
309 printf(LOG_PREFIX "Warning - Illegal MAC address (%s)"
310 " in EEPROM.\n", str);
311 else {
312 printf(LOG_PREFIX "Using MAC (%s) from I2C EEPROM\n",
313 str);
314 setenv("ethaddr", str);
315 }
316 } else {
317 printf(LOG_PREFIX "Warning - Unable to read MAC from I2C"
6d0f6bcf 318 " device at address %02X:%04X\n", CONFIG_SYS_I2C_EEPROM,
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319 CONFIG_MAC_OFFSET);
320 }
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321 hostname[0] = 0x00;
322 /* set the hostname appropriate to the module we're running on */
323 compose_hostname(hw_id, hostname);
324 setenv("hostname", hostname);
325
ea818dbb 326#endif /* defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C_SOFT) */
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327 if (!getenv("ethaddr"))
328 printf(LOG_PREFIX "MAC address not set, networking is not "
329 "operational\n");
330
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331 return 0;
332}
333#endif /* CONFIG_MISC_INIT_R */
334
335
336#ifdef CONFIG_LAST_STAGE_INIT
337int last_stage_init(void)
338{
339#ifdef CONFIG_USB_STORAGE
340 cm5200_fwupdate();
341#endif /* CONFIG_USB_STORAGE */
342 return 0;
343}
344#endif /* CONFIG_LAST_STAGE_INIT */
345
346
7ffe3cd6 347#ifdef CONFIG_OF_BOARD_SETUP
e895a4b0 348int ft_board_setup(void *blob, bd_t *bd)
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349{
350 ft_cpu_setup(blob, bd);
351 ft_blob_update(blob, bd);
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352
353 return 0;
86b116b1 354}
7ffe3cd6 355#endif /* CONFIG_OF_BOARD_SETUP */