2 * Copyright (C) 2005 Sandburst Corporation
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/processor.h>
11 #include <spd_sdram.h>
13 #include "sb_common.h"
15 DECLARE_GLOBAL_DATA_PTR;
17 long int fixed_sdram (void);
19 /*************************************************************************
22 * PRI_N - active low signal. If the GPIO pin is low we are the master
24 ************************************************************************/
25 int sbcommon_get_master(void)
27 ppc440_gpio_regs_t *gpio_regs;
29 gpio_regs = (ppc440_gpio_regs_t *)CONFIG_SYS_GPIO_BASE;
31 if (gpio_regs->in & SBCOMMON_GPIO_PRI_N) {
39 /*************************************************************************
40 * metrobox_secondary_present
42 * Figure out if secondary/slave board is present
44 ************************************************************************/
45 int sbcommon_secondary_present(void)
47 ppc440_gpio_regs_t *gpio_regs;
49 gpio_regs = (ppc440_gpio_regs_t *)CONFIG_SYS_GPIO_BASE;
51 if (gpio_regs->in & SBCOMMON_GPIO_SEC_PRES)
57 /*************************************************************************
58 * sbcommon_get_serial_number
60 * Retrieve the board serial number via the mac address in eeprom
62 ************************************************************************/
63 unsigned short sbcommon_get_serial_number(void)
65 unsigned char buff[0x100];
66 unsigned short sernum;
68 /* Get the board serial number from eeprom */
72 /* Read 256 bytes in EEPROM */
73 i2c_read (0x50, 0, 1, buff, 0x100);
75 memcpy(&sernum, &buff[0xF4], 2);
81 /*************************************************************************
84 * Spin up fans 2 & 3 to get some air moving. OS will take care
85 * of the rest. This is mostly a precaution...
87 * Assumes i2c bus 1 is ready.
89 ************************************************************************/
90 void sbcommon_fans(void)
93 * Attempt to turn on 2 of the fans...
94 * Need to go through the bridge
99 /* select fan4 through the bridge */
100 i2c_reg_write(0x73, /* addr */
102 0x08); /* val = bus 4 */
113 /* Deselect bus 4 on the bridge */
118 /* select fan3 through the bridge */
119 i2c_reg_write(0x73, /* addr */
121 0x04); /* val = bus 3 */
132 /* Deselect bus 3 on the bridge */
137 /* select fan2 through the bridge */
138 i2c_reg_write(0x73, /* addr */
140 0x02); /* val = bus 4 */
151 /* Deselect bus 2 on the bridge */
156 /* select fan1 through the bridge */
157 i2c_reg_write(0x73, /* addr */
159 0x01); /* val = bus 0 */
170 /* Deselect bus 1 on the bridge */
182 /*************************************************************************
187 ************************************************************************/
188 phys_size_t initdram (int board_type)
192 #if defined(CONFIG_SPD_EEPROM)
193 dram_size = spd_sdram ();
195 dram_size = fixed_sdram ();
201 /*************************************************************************
205 ************************************************************************/
206 #if defined(CONFIG_SYS_DRAM_TEST)
209 uint *pstart = (uint *) CONFIG_SYS_MEMTEST_START;
210 uint *pend = (uint *) CONFIG_SYS_MEMTEST_END;
213 printf("Testing SDRAM: ");
214 for (p = pstart; p < pend; p++)
217 for (p = pstart; p < pend; p++) {
218 if (*p != 0xaaaaaaaa) {
219 printf ("SDRAM test fails at: %08x\n", (uint) p);
224 for (p = pstart; p < pend; p++)
227 for (p = pstart; p < pend; p++) {
228 if (*p != 0x55555555) {
229 printf ("SDRAM test fails at: %08x\n", (uint) p);
239 #if !defined(CONFIG_SPD_EEPROM)
240 /*************************************************************************
241 * fixed sdram init -- doesn't use serial presence detect.
243 * Assumes: 128 MB, non-ECC, non-registered
246 ************************************************************************/
247 long int fixed_sdram (void)
251 /*--------------------------------------------------------------------
253 *------------------------------------------------------------------*/
254 mtsdram (SDRAM0_UABBA, 0x00000000); /* ubba=0 (default) */
255 mtsdram (SDRAM0_SLIO, 0x00000000); /* rdre=0 wrre=0 rarw=0 */
256 mtsdram (SDRAM0_DEVOPT, 0x00000000); /* dll=0 ds=0 (normal) */
257 mtsdram (SDRAM0_WDDCTR, 0x00000000); /* wrcp=0 dcd=0 */
258 mtsdram (SDRAM0_CLKTR, 0x40000000); /* clkp=1 (90 deg wr) dcdt=0 */
260 /*--------------------------------------------------------------------
261 * Setup for board-specific specific mem
262 *------------------------------------------------------------------*/
264 * Following for CAS Latency = 2.5 @ 133 MHz PLB
266 mtsdram (SDRAM0_B0CR, 0x000a4001); /* SDBA=0x000 128MB, Mode 3, enabled */
267 mtsdram (SDRAM0_TR0, 0x410a4012); /* WR=2 WD=1 CL=2.5 PA=3 CP=4 LD=2 */
269 mtsdram (SDRAM0_TR1, 0x8080082f); /* SS=T2 SL=STAGE 3 CD=1 CT=0x02f */
270 mtsdram (SDRAM0_RTR, 0x08200000); /* Rate 15.625 ns @ 133 MHz PLB */
271 mtsdram (SDRAM0_CFG1, 0x00000000); /* Self-refresh exit, disable PM */
272 udelay (400); /* Delay 200 usecs (min) */
274 /*--------------------------------------------------------------------
275 * Enable the controller, then wait for DCEN to complete
276 *------------------------------------------------------------------*/
277 mtsdram (SDRAM0_CFG0, 0x86000000); /* DCEN=1, PMUD=1, 64-bit */
279 mfsdram (SDRAM0_MCSTS, reg);
280 if (reg & 0x80000000)
284 return (128 * 1024 * 1024); /* 128 MB */
286 #endif /* !defined(CONFIG_SPD_EEPROM) */
288 /*************************************************************************
291 * Get the ethernet MAC address for the management ethernet from the
292 * strap EEPROM. Note that is the BASE address for the range of
293 * external ethernet MACs on the board. The base + 31 is the actual
296 ************************************************************************/
298 void board_get_enetaddr(int macaddr_idx, uchar *enet)
302 unsigned char buff[0x100], *cp;
304 if (0 == macaddr_idx) {
309 /* Read 256 bytes in EEPROM */
310 i2c_read (0x50, 0, 1, buff, 0x100);
314 for (i = 0; i < 6; i++,cp++)
317 memcpy(&tmp, &enet[4], 2);
319 memcpy(&enet[4], &tmp, 2);
327 if (1 == sbcommon_get_master() ) {
328 /* Master/Primary card */
331 /* Slave/Secondary card */
341 * Returns 1 if keys pressed to start the power-on long-running tests
342 * Called from board_init_f().
344 int post_hotkeys_pressed(void)