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[ColdFire MCF5271 family] Add CPU detection based on the value of Chip
Identification Register (CIR).
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2 changed files with 39 additions and 1 deletions
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@ -49,11 +49,43 @@
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#endif
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#ifdef CONFIG_M5271
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/*
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* Both MCF5270 and MCF5271 are members of the MPC5271 family. Try to
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* determine which one we are running on, based on the Chip Identification
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* Register (CIR).
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*/
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int checkcpu (void)
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{
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char buf[32];
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unsigned short cir; /* Chip Identification Register */
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unsigned short pin; /* Part identification number */
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unsigned char prn; /* Part revision number */
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char *cpu_model;
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cir = mbar_readShort(MCF_CCM_CIR);
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pin = cir >> MCF_CCM_CIR_PIN_LEN;
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prn = cir & MCF_CCM_CIR_PRN_MASK;
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switch (pin) {
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case MCF_CCM_CIR_PIN_MCF5270:
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cpu_model = "5270";
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break;
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case MCF_CCM_CIR_PIN_MCF5271:
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cpu_model = "5271";
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break;
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default:
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cpu_model = NULL;
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break;
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}
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if (cpu_model)
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printf("CPU: Freescale ColdFire MCF%s rev. %hu, at %s MHz\n",
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cpu_model, prn, strmhz(buf, CFG_CLK));
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else
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printf("CPU: Unknown - Freescale ColdFire MCF5271 family"
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" (PIN: 0x%x) rev. %hu, at %s MHz\n",
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pin, prn, strmhz(buf, CFG_CLK));
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printf ("CPU: Freescale Coldfire MCF5271 at %s MHz\n", strmhz(buf, CFG_CLK));
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return 0;
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}
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@ -57,6 +57,12 @@
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#define MCF_GPIO_PAR_FECI2C 0x100047
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#define MCF_GPIO_PAR_UART 0x100048
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#define MCF_CCM_CIR 0x11000A
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#define MCF_CCM_CIR_PRN_MASK 0x3F
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#define MCF_CCM_CIR_PIN_LEN 6
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#define MCF_CCM_CIR_PIN_MCF5270 0x2e
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#define MCF_CCM_CIR_PIN_MCF5271 0x80
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#define MCF_GPIO_AD_ADDR23 0x80
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#define MCF_GPIO_AD_ADDR22 0x40
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#define MCF_GPIO_AD_ADDR21 0x20
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