mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-23 22:43:21 +02:00
bd2e5d7b03
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13528 3c298f89-4303-0410-b956-a3cf2f4a3e73
198 lines
6.0 KiB
Diff
198 lines
6.0 KiB
Diff
--- a/arch/powerpc/boot/Makefile
|
|
+++ b/arch/powerpc/boot/Makefile
|
|
@@ -68,7 +68,8 @@ src-plat := of.c cuboot-52xx.c cuboot-82
|
|
fixed-head.S ep88xc.c ep405.c cuboot-c2k.c \
|
|
cuboot-katmai.c cuboot-rainier.c redboot-8xx.c ep8248e.c \
|
|
cuboot-warp.c cuboot-85xx-cpm2.c cuboot-yosemite.c simpleboot.c \
|
|
- virtex405-head.S virtex.c redboot-83xx.c cuboot-sam440ep.c
|
|
+ virtex405-head.S virtex.c redboot-83xx.c cuboot-sam440ep.c \
|
|
+ cuboot-acadia.c
|
|
src-boot := $(src-wlib) $(src-plat) empty.c
|
|
|
|
src-boot := $(addprefix $(obj)/, $(src-boot))
|
|
@@ -211,6 +212,7 @@ image-$(CONFIG_DEFAULT_UIMAGE) += uImag
|
|
# Board ports in arch/powerpc/platform/40x/Kconfig
|
|
image-$(CONFIG_EP405) += dtbImage.ep405
|
|
image-$(CONFIG_WALNUT) += treeImage.walnut
|
|
+image-$(CONFIG_ACADIA) += cuImage.acadia
|
|
|
|
# Board ports in arch/powerpc/platform/44x/Kconfig
|
|
image-$(CONFIG_EBONY) += treeImage.ebony cuImage.ebony
|
|
--- /dev/null
|
|
+++ b/arch/powerpc/boot/cuboot-acadia.c
|
|
@@ -0,0 +1,174 @@
|
|
+/*
|
|
+ * Old U-boot compatibility for Acadia
|
|
+ *
|
|
+ * Author: Josh Boyer <jwboyer@linux.vnet.ibm.com>
|
|
+ *
|
|
+ * Copyright 2008 IBM Corporation
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License version 2 as published
|
|
+ * by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+#include "ops.h"
|
|
+#include "io.h"
|
|
+#include "dcr.h"
|
|
+#include "stdio.h"
|
|
+#include "4xx.h"
|
|
+#include "44x.h"
|
|
+#include "cuboot.h"
|
|
+
|
|
+#define TARGET_4xx
|
|
+#include "ppcboot.h"
|
|
+
|
|
+static bd_t bd;
|
|
+
|
|
+#define CPR_PERD0_SPIDV_MASK 0x000F0000 /* SPI Clock Divider */
|
|
+
|
|
+#define PLLC_SRC_MASK 0x20000000 /* PLL feedback source */
|
|
+
|
|
+#define PLLD_FBDV_MASK 0x1F000000 /* PLL feedback divider value */
|
|
+#define PLLD_FWDVA_MASK 0x000F0000 /* PLL forward divider A value */
|
|
+#define PLLD_FWDVB_MASK 0x00000700 /* PLL forward divider B value */
|
|
+
|
|
+#define PRIMAD_CPUDV_MASK 0x0F000000 /* CPU Clock Divisor Mask */
|
|
+#define PRIMAD_PLBDV_MASK 0x000F0000 /* PLB Clock Divisor Mask */
|
|
+#define PRIMAD_OPBDV_MASK 0x00000F00 /* OPB Clock Divisor Mask */
|
|
+#define PRIMAD_EBCDV_MASK 0x0000000F /* EBC Clock Divisor Mask */
|
|
+
|
|
+#define PERD0_PWMDV_MASK 0xFF000000 /* PWM Divider Mask */
|
|
+#define PERD0_SPIDV_MASK 0x000F0000 /* SPI Divider Mask */
|
|
+#define PERD0_U0DV_MASK 0x0000FF00 /* UART 0 Divider Mask */
|
|
+#define PERD0_U1DV_MASK 0x000000FF /* UART 1 Divider Mask */
|
|
+
|
|
+static void get_clocks(void)
|
|
+{
|
|
+ unsigned long sysclk, cpr_plld, cpr_pllc, cpr_primad, plloutb, i;
|
|
+ unsigned long pllFwdDiv, pllFwdDivB, pllFbkDiv, pllPlbDiv, pllExtBusDiv;
|
|
+ unsigned long pllOpbDiv, freqEBC, freqUART, freqOPB;
|
|
+ unsigned long div; /* total divisor udiv * bdiv */
|
|
+ unsigned long umin; /* minimum udiv */
|
|
+ unsigned short diff; /* smallest diff */
|
|
+ unsigned long udiv; /* best udiv */
|
|
+ unsigned short idiff; /* current diff */
|
|
+ unsigned short ibdiv; /* current bdiv */
|
|
+ unsigned long est; /* current estimate */
|
|
+ unsigned long baud;
|
|
+ void *np;
|
|
+
|
|
+ /* read the sysclk value from the CPLD */
|
|
+ sysclk = (in_8((unsigned char *)0x80000000) == 0xc) ? 66666666 : 33333000;
|
|
+
|
|
+ /*
|
|
+ * Read PLL Mode registers
|
|
+ */
|
|
+ cpr_plld = CPR0_READ(DCRN_CPR0_PLLD);
|
|
+ cpr_pllc = CPR0_READ(DCRN_CPR0_PLLC);
|
|
+
|
|
+ /*
|
|
+ * Determine forward divider A
|
|
+ */
|
|
+ pllFwdDiv = ((cpr_plld & PLLD_FWDVA_MASK) >> 16);
|
|
+
|
|
+ /*
|
|
+ * Determine forward divider B
|
|
+ */
|
|
+ pllFwdDivB = ((cpr_plld & PLLD_FWDVB_MASK) >> 8);
|
|
+ if (pllFwdDivB == 0)
|
|
+ pllFwdDivB = 8;
|
|
+
|
|
+ /*
|
|
+ * Determine FBK_DIV.
|
|
+ */
|
|
+ pllFbkDiv = ((cpr_plld & PLLD_FBDV_MASK) >> 24);
|
|
+ if (pllFbkDiv == 0)
|
|
+ pllFbkDiv = 256;
|
|
+
|
|
+ /*
|
|
+ * Read CPR_PRIMAD register
|
|
+ */
|
|
+ cpr_primad = CPR0_READ(DCRN_CPR0_PRIMAD);
|
|
+
|
|
+ /*
|
|
+ * Determine PLB_DIV.
|
|
+ */
|
|
+ pllPlbDiv = ((cpr_primad & PRIMAD_PLBDV_MASK) >> 16);
|
|
+ if (pllPlbDiv == 0)
|
|
+ pllPlbDiv = 16;
|
|
+
|
|
+ /*
|
|
+ * Determine EXTBUS_DIV.
|
|
+ */
|
|
+ pllExtBusDiv = (cpr_primad & PRIMAD_EBCDV_MASK);
|
|
+ if (pllExtBusDiv == 0)
|
|
+ pllExtBusDiv = 16;
|
|
+
|
|
+ /*
|
|
+ * Determine OPB_DIV.
|
|
+ */
|
|
+ pllOpbDiv = ((cpr_primad & PRIMAD_OPBDV_MASK) >> 8);
|
|
+ if (pllOpbDiv == 0)
|
|
+ pllOpbDiv = 16;
|
|
+
|
|
+ /* There is a bug in U-Boot that prevents us from using
|
|
+ * bd.bi_opbfreq because U-Boot doesn't populate it for
|
|
+ * 405EZ. We get to calculate it, yay!
|
|
+ */
|
|
+ freqOPB = (sysclk *pllFbkDiv) /pllOpbDiv;
|
|
+
|
|
+ freqEBC = (sysclk * pllFbkDiv) / pllExtBusDiv;
|
|
+
|
|
+ plloutb = ((sysclk * ((cpr_pllc & PLLC_SRC_MASK) ?
|
|
+ pllFwdDivB : pllFwdDiv) *
|
|
+ pllFbkDiv) / pllFwdDivB);
|
|
+
|
|
+ np = find_node_by_alias("serial0");
|
|
+ if (getprop(np, "current-speed", &baud, sizeof(baud)) != sizeof(baud))
|
|
+ fatal("no current-speed property\n\r");
|
|
+
|
|
+ udiv = 256; /* Assume lowest possible serial clk */
|
|
+ div = plloutb / (16 * baud); /* total divisor */
|
|
+ umin = (plloutb / freqOPB) << 1; /* 2 x OPB divisor */
|
|
+ diff = 256; /* highest possible */
|
|
+
|
|
+ /* i is the test udiv value -- start with the largest
|
|
+ * possible (256) to minimize serial clock and constrain
|
|
+ * search to umin.
|
|
+ */
|
|
+ for (i = 256; i > umin; i--) {
|
|
+ ibdiv = div / i;
|
|
+ est = i * ibdiv;
|
|
+ idiff = (est > div) ? (est-div) : (div-est);
|
|
+ if (idiff == 0) {
|
|
+ udiv = i;
|
|
+ break; /* can't do better */
|
|
+ } else if (idiff < diff) {
|
|
+ udiv = i; /* best so far */
|
|
+ diff = idiff; /* update lowest diff*/
|
|
+ }
|
|
+ }
|
|
+ freqUART = plloutb / udiv;
|
|
+
|
|
+ dt_fixup_cpu_clocks(bd.bi_procfreq, bd.bi_intfreq, bd.bi_plb_busfreq);
|
|
+ dt_fixup_clock("/plb/ebc", freqEBC);
|
|
+ dt_fixup_clock("/plb/opb", freqOPB);
|
|
+ dt_fixup_clock("/plb/opb/serial@ef600300", freqUART);
|
|
+ dt_fixup_clock("/plb/opb/serial@ef600400", freqUART);
|
|
+}
|
|
+
|
|
+static void acadia_fixups(void)
|
|
+{
|
|
+ dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
|
|
+ get_clocks();
|
|
+ dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr);
|
|
+}
|
|
+
|
|
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
|
|
+ unsigned long r6, unsigned long r7)
|
|
+{
|
|
+ CUBOOT_INIT();
|
|
+ platform_ops.fixups = acadia_fixups;
|
|
+ platform_ops.exit = ibm40x_dbcr_reset;
|
|
+ fdt_init(_dtb_start);
|
|
+ serial_console_init();
|
|
+}
|