[ColdFire MCF5271 family] Add CPU detection based on the value of Chip

Identification Register (CIR).
This commit is contained in:
Bartlomiej Sieka 2007-01-23 13:25:22 +01:00
parent c84bad0ef6
commit 363d1d8f9c
2 changed files with 39 additions and 1 deletions

View file

@ -49,11 +49,43 @@
#endif
#ifdef CONFIG_M5271
/*
* Both MCF5270 and MCF5271 are members of the MPC5271 family. Try to
* determine which one we are running on, based on the Chip Identification
* Register (CIR).
*/
int checkcpu (void)
{
char buf[32];
unsigned short cir; /* Chip Identification Register */
unsigned short pin; /* Part identification number */
unsigned char prn; /* Part revision number */
char *cpu_model;
cir = mbar_readShort(MCF_CCM_CIR);
pin = cir >> MCF_CCM_CIR_PIN_LEN;
prn = cir & MCF_CCM_CIR_PRN_MASK;
switch (pin) {
case MCF_CCM_CIR_PIN_MCF5270:
cpu_model = "5270";
break;
case MCF_CCM_CIR_PIN_MCF5271:
cpu_model = "5271";
break;
default:
cpu_model = NULL;
break;
}
if (cpu_model)
printf("CPU: Freescale ColdFire MCF%s rev. %hu, at %s MHz\n",
cpu_model, prn, strmhz(buf, CFG_CLK));
else
printf("CPU: Unknown - Freescale ColdFire MCF5271 family"
" (PIN: 0x%x) rev. %hu, at %s MHz\n",
pin, prn, strmhz(buf, CFG_CLK));
printf ("CPU: Freescale Coldfire MCF5271 at %s MHz\n", strmhz(buf, CFG_CLK));
return 0;
}

View file

@ -57,6 +57,12 @@
#define MCF_GPIO_PAR_FECI2C 0x100047
#define MCF_GPIO_PAR_UART 0x100048
#define MCF_CCM_CIR 0x11000A
#define MCF_CCM_CIR_PRN_MASK 0x3F
#define MCF_CCM_CIR_PIN_LEN 6
#define MCF_CCM_CIR_PIN_MCF5270 0x2e
#define MCF_CCM_CIR_PIN_MCF5271 0x80
#define MCF_GPIO_AD_ADDR23 0x80
#define MCF_GPIO_AD_ADDR22 0x40
#define MCF_GPIO_AD_ADDR21 0x20