[POWERPC] 4xx: Add 405GPr and 405EP support in boot wrapper
This patch adds support for 405GPr processors with optional
new mode strapping. ibm405gp_fixup_clocks() can now be used
for 405GP and 405GPr CPUs.
This is in preparation of porting the cpci405 platform support
from arch/ppc to arch/powerpc.
This patch also adds ibm405ep_fixup_clocks() to support
405EP CPUs from the boot wrapper.
Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
diff --git a/arch/powerpc/boot/4xx.c b/arch/powerpc/boot/4xx.c
index 33f25b6..61a4045 100644
--- a/arch/powerpc/boot/4xx.c
+++ b/arch/powerpc/boot/4xx.c
@@ -499,20 +499,45 @@
u32 pllmr = mfdcr(DCRN_CPC0_PLLMR);
u32 cpc0_cr0 = mfdcr(DCRN_405_CPC0_CR0);
u32 cpc0_cr1 = mfdcr(DCRN_405_CPC0_CR1);
+ u32 psr = mfdcr(DCRN_405_CPC0_PSR);
u32 cpu, plb, opb, ebc, tb, uart0, uart1, m;
- u32 fwdv, fbdv, cbdv, opdv, epdv, udiv;
+ u32 fwdv, fwdvb, fbdv, cbdv, opdv, epdv, ppdv, udiv;
fwdv = (8 - ((pllmr & 0xe0000000) >> 29));
fbdv = (pllmr & 0x1e000000) >> 25;
- cbdv = ((pllmr & 0x00060000) >> 17) + 1;
- opdv = ((pllmr & 0x00018000) >> 15) + 1;
- epdv = ((pllmr & 0x00001800) >> 13) + 2;
+ if (fbdv == 0)
+ fbdv = 16;
+ cbdv = ((pllmr & 0x00060000) >> 17) + 1; /* CPU:PLB */
+ opdv = ((pllmr & 0x00018000) >> 15) + 1; /* PLB:OPB */
+ ppdv = ((pllmr & 0x00001800) >> 13) + 1; /* PLB:PCI */
+ epdv = ((pllmr & 0x00001800) >> 11) + 2; /* PLB:EBC */
udiv = ((cpc0_cr0 & 0x3e) >> 1) + 1;
- m = fwdv * fbdv * cbdv;
+ /* check for 405GPr */
+ if ((mfpvr() & 0xfffffff0) == (0x50910951 & 0xfffffff0)) {
+ fwdvb = 8 - (pllmr & 0x00000007);
+ if (!(psr & 0x00001000)) /* PCI async mode enable == 0 */
+ if (psr & 0x00000020) /* New mode enable */
+ m = fwdvb * 2 * ppdv;
+ else
+ m = fwdvb * cbdv * ppdv;
+ else if (psr & 0x00000020) /* New mode enable */
+ if (psr & 0x00000800) /* PerClk synch mode */
+ m = fwdvb * 2 * epdv;
+ else
+ m = fbdv * fwdv;
+ else if (epdv == fbdv)
+ m = fbdv * cbdv * epdv;
+ else
+ m = fbdv * fwdvb * cbdv;
- cpu = sys_clk * m / fwdv;
- plb = cpu / cbdv;
+ cpu = sys_clk * m / fwdv;
+ plb = sys_clk * m / (fwdvb * cbdv);
+ } else {
+ m = fwdv * fbdv * cbdv;
+ cpu = sys_clk * m / fwdv;
+ plb = cpu / cbdv;
+ }
opb = plb / opdv;
ebc = plb / epdv;
@@ -541,3 +566,45 @@
dt_fixup_clock("/plb/opb/serial@ef600400", uart1);
}
+
+void ibm405ep_fixup_clocks(unsigned int sys_clk)
+{
+ u32 pllmr0 = mfdcr(DCRN_CPC0_PLLMR0);
+ u32 pllmr1 = mfdcr(DCRN_CPC0_PLLMR1);
+ u32 cpc0_ucr = mfdcr(DCRN_CPC0_UCR);
+ u32 cpu, plb, opb, ebc, uart0, uart1;
+ u32 fwdva, fwdvb, fbdv, cbdv, opdv, epdv;
+ u32 pllmr0_ccdv, tb, m;
+
+ fwdva = 8 - ((pllmr1 & 0x00070000) >> 16);
+ fwdvb = 8 - ((pllmr1 & 0x00007000) >> 12);
+ fbdv = (pllmr1 & 0x00f00000) >> 20;
+ if (fbdv == 0)
+ fbdv = 16;
+
+ cbdv = ((pllmr0 & 0x00030000) >> 16) + 1; /* CPU:PLB */
+ epdv = ((pllmr0 & 0x00000300) >> 8) + 2; /* PLB:EBC */
+ opdv = ((pllmr0 & 0x00003000) >> 12) + 1; /* PLB:OPB */
+
+ m = fbdv * fwdvb;
+
+ pllmr0_ccdv = ((pllmr0 & 0x00300000) >> 20) + 1;
+ if (pllmr1 & 0x80000000)
+ cpu = sys_clk * m / (fwdva * pllmr0_ccdv);
+ else
+ cpu = sys_clk / pllmr0_ccdv;
+
+ plb = cpu / cbdv;
+ opb = plb / opdv;
+ ebc = plb / epdv;
+ tb = cpu;
+ uart0 = cpu / (cpc0_ucr & 0x0000007f);
+ uart1 = cpu / ((cpc0_ucr & 0x00007f00) >> 8);
+
+ dt_fixup_cpu_clocks(cpu, tb, 0);
+ dt_fixup_clock("/plb", plb);
+ dt_fixup_clock("/plb/opb", opb);
+ dt_fixup_clock("/plb/ebc", ebc);
+ dt_fixup_clock("/plb/opb/serial@ef600300", uart0);
+ dt_fixup_clock("/plb/opb/serial@ef600400", uart1);
+}
diff --git a/arch/powerpc/boot/4xx.h b/arch/powerpc/boot/4xx.h
index fbe0632..2606e64 100644
--- a/arch/powerpc/boot/4xx.h
+++ b/arch/powerpc/boot/4xx.h
@@ -20,6 +20,7 @@
void ibm4xx_fixup_ebc_ranges(const char *ebc);
void ibm405gp_fixup_clocks(unsigned int sys_clk, unsigned int ser_clk);
+void ibm405ep_fixup_clocks(unsigned int sys_clk);
void ibm440gp_fixup_clocks(unsigned int sys_clk, unsigned int ser_clk);
void ibm440ep_fixup_clocks(unsigned int sys_clk, unsigned int ser_clk,
unsigned int tmr_clk);
diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h
index 55655f7..95b9f53 100644
--- a/arch/powerpc/boot/dcr.h
+++ b/arch/powerpc/boot/dcr.h
@@ -146,7 +146,12 @@
#define DCRN_CPC0_PLLMR 0xb0
#define DCRN_405_CPC0_CR0 0xb1
#define DCRN_405_CPC0_CR1 0xb2
+#define DCRN_405_CPC0_PSR 0xb4
+/* 405EP Clocking/Power Management/Chip Control regs */
+#define DCRN_CPC0_PLLMR0 0xf0
+#define DCRN_CPC0_PLLMR1 0xf4
+#define DCRN_CPC0_UCR 0xf5
/* 440GX Clock control etc */