diff options
Diffstat (limited to 'target/linux/ppc40x/patches/004-acadia_cuboot.patch')
| -rw-r--r-- | target/linux/ppc40x/patches/004-acadia_cuboot.patch | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/target/linux/ppc40x/patches/004-acadia_cuboot.patch b/target/linux/ppc40x/patches/004-acadia_cuboot.patch new file mode 100644 index 0000000000..6c415ea655 --- /dev/null +++ b/target/linux/ppc40x/patches/004-acadia_cuboot.patch @@ -0,0 +1,202 @@ +diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile +index 6403275..5f4a59c 100644 +--- a/arch/powerpc/boot/Makefile ++++ b/arch/powerpc/boot/Makefile +@@ -68,7 +68,8 @@ src-plat := of.c cuboot-52xx.c cuboot-824x.c cuboot-83xx.c cuboot-85xx.c holly.c + 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) += uImage + # 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 +diff --git a/arch/powerpc/boot/cuboot-acadia.c b/arch/powerpc/boot/cuboot-acadia.c +new file mode 100644 +index 0000000..0634aba +--- /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(); ++} |