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-rw-r--r--package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbmips.c951
1 files changed, 951 insertions, 0 deletions
diff --git a/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbmips.c b/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbmips.c
new file mode 100644
index 000000000..6daaeb78c
--- /dev/null
+++ b/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbmips.c
@@ -0,0 +1,951 @@
+/*
+ * BCM47XX Sonics SiliconBackplane MIPS core routines
+ *
+ * Copyright 2004, Broadcom Corporation
+ * All Rights Reserved.
+ *
+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
+ *
+ * $Id$
+ */
+
+#include <typedefs.h>
+#include <osl.h>
+#include <sbutils.h>
+#include <bcmdevs.h>
+#include <bcmnvram.h>
+#include <bcmutils.h>
+#include <hndmips.h>
+#include <sbconfig.h>
+#include <sbextif.h>
+#include <sbchipc.h>
+#include <sbmemc.h>
+
+/*
+ * Memory segments (32bit kernel mode addresses)
+ */
+#undef KUSEG
+#undef KSEG0
+#undef KSEG1
+#undef KSEG2
+#undef KSEG3
+#define KUSEG 0x00000000
+#define KSEG0 0x80000000
+#define KSEG1 0xa0000000
+#define KSEG2 0xc0000000
+#define KSEG3 0xe0000000
+
+/*
+ * Map an address to a certain kernel segment
+ */
+#undef KSEG0ADDR
+#undef KSEG1ADDR
+#undef KSEG2ADDR
+#undef KSEG3ADDR
+#define KSEG0ADDR(a) (((a) & 0x1fffffff) | KSEG0)
+#define KSEG1ADDR(a) (((a) & 0x1fffffff) | KSEG1)
+#define KSEG2ADDR(a) (((a) & 0x1fffffff) | KSEG2)
+#define KSEG3ADDR(a) (((a) & 0x1fffffff) | KSEG3)
+
+/*
+ * The following macros are especially useful for __asm__
+ * inline assembler.
+ */
+#ifndef __STR
+#define __STR(x) #x
+#endif
+#ifndef STR
+#define STR(x) __STR(x)
+#endif
+
+/* *********************************************************************
+ * CP0 Registers
+ ********************************************************************* */
+
+#define C0_INX 0 /* CP0: TLB Index */
+#define C0_RAND 1 /* CP0: TLB Random */
+#define C0_TLBLO0 2 /* CP0: TLB EntryLo0 */
+#define C0_TLBLO C0_TLBLO0 /* CP0: TLB EntryLo0 */
+#define C0_TLBLO1 3 /* CP0: TLB EntryLo1 */
+#define C0_CTEXT 4 /* CP0: Context */
+#define C0_PGMASK 5 /* CP0: TLB PageMask */
+#define C0_WIRED 6 /* CP0: TLB Wired */
+#define C0_BADVADDR 8 /* CP0: Bad Virtual Address */
+#define C0_COUNT 9 /* CP0: Count */
+#define C0_TLBHI 10 /* CP0: TLB EntryHi */
+#define C0_COMPARE 11 /* CP0: Compare */
+#define C0_SR 12 /* CP0: Processor Status */
+#define C0_STATUS C0_SR /* CP0: Processor Status */
+#define C0_CAUSE 13 /* CP0: Exception Cause */
+#define C0_EPC 14 /* CP0: Exception PC */
+#define C0_PRID 15 /* CP0: Processor Revision Indentifier */
+#define C0_CONFIG 16 /* CP0: Config */
+#define C0_LLADDR 17 /* CP0: LLAddr */
+#define C0_WATCHLO 18 /* CP0: WatchpointLo */
+#define C0_WATCHHI 19 /* CP0: WatchpointHi */
+#define C0_XCTEXT 20 /* CP0: XContext */
+#define C0_DIAGNOSTIC 22 /* CP0: Diagnostic */
+#define C0_BROADCOM C0_DIAGNOSTIC /* CP0: Broadcom Register */
+#define C0_ECC 26 /* CP0: ECC */
+#define C0_CACHEERR 27 /* CP0: CacheErr */
+#define C0_TAGLO 28 /* CP0: TagLo */
+#define C0_TAGHI 29 /* CP0: TagHi */
+#define C0_ERREPC 30 /* CP0: ErrorEPC */
+
+/*
+ * Macros to access the system control coprocessor
+ */
+
+#define MFC0(source, sel) \
+({ \
+ int __res; \
+ __asm__ __volatile__( \
+ ".set\tnoreorder\n\t" \
+ ".set\tnoat\n\t" \
+ ".word\t"STR(0x40010000 | ((source)<<11) | (sel))"\n\t" \
+ "move\t%0,$1\n\t" \
+ ".set\tat\n\t" \
+ ".set\treorder" \
+ :"=r" (__res) \
+ : \
+ :"$1"); \
+ __res; \
+})
+
+#define MTC0(source, sel, value) \
+do { \
+ __asm__ __volatile__( \
+ ".set\tnoreorder\n\t" \
+ ".set\tnoat\n\t" \
+ "move\t$1,%z0\n\t" \
+ ".word\t"STR(0x40810000 | ((source)<<11) | (sel))"\n\t" \
+ ".set\tat\n\t" \
+ ".set\treorder" \
+ : \
+ :"Jr" (value) \
+ :"$1"); \
+} while (0)
+
+/*
+ * R4x00 interrupt enable / cause bits
+ */
+#undef IE_SW0
+#undef IE_SW1
+#undef IE_IRQ0
+#undef IE_IRQ1
+#undef IE_IRQ2
+#undef IE_IRQ3
+#undef IE_IRQ4
+#undef IE_IRQ5
+#define IE_SW0 (1<< 8)
+#define IE_SW1 (1<< 9)
+#define IE_IRQ0 (1<<10)
+#define IE_IRQ1 (1<<11)
+#define IE_IRQ2 (1<<12)
+#define IE_IRQ3 (1<<13)
+#define IE_IRQ4 (1<<14)
+#define IE_IRQ5 (1<<15)
+
+/*
+ * Bitfields in the R4xx0 cp0 status register
+ */
+#define ST0_IE 0x00000001
+#define ST0_EXL 0x00000002
+#define ST0_ERL 0x00000004
+#define ST0_KSU 0x00000018
+# define KSU_USER 0x00000010
+# define KSU_SUPERVISOR 0x00000008
+# define KSU_KERNEL 0x00000000
+#define ST0_UX 0x00000020
+#define ST0_SX 0x00000040
+#define ST0_KX 0x00000080
+#define ST0_DE 0x00010000
+#define ST0_CE 0x00020000
+
+/*
+ * Status register bits available in all MIPS CPUs.
+ */
+#define ST0_IM 0x0000ff00
+#define ST0_CH 0x00040000
+#define ST0_SR 0x00100000
+#define ST0_TS 0x00200000
+#define ST0_BEV 0x00400000
+#define ST0_RE 0x02000000
+#define ST0_FR 0x04000000
+#define ST0_CU 0xf0000000
+#define ST0_CU0 0x10000000
+#define ST0_CU1 0x20000000
+#define ST0_CU2 0x40000000
+#define ST0_CU3 0x80000000
+#define ST0_XX 0x80000000 /* MIPS IV naming */
+
+/*
+ * Cache Operations
+ */
+
+#ifndef Fill_I
+#define Fill_I 0x14
+#endif
+
+#define cache_unroll(base,op) \
+ __asm__ __volatile__(" \
+ .set noreorder; \
+ .set mips3; \
+ cache %1, (%0); \
+ .set mips0; \
+ .set reorder" \
+ : \
+ : "r" (base), \
+ "i" (op));
+
+/*
+ * These are the UART port assignments, expressed as offsets from the base
+ * register. These assignments should hold for any serial port based on
+ * a 8250, 16450, or 16550(A).
+ */
+
+#define UART_MCR 4 /* Out: Modem Control Register */
+#define UART_MSR 6 /* In: Modem Status Register */
+#define UART_MCR_LOOP 0x10 /* Enable loopback test mode */
+
+/*
+ * Returns TRUE if an external UART exists at the given base
+ * register.
+ */
+static bool
+serial_exists(uint8 *regs)
+{
+ uint8 save_mcr, status1;
+
+ save_mcr = R_REG(&regs[UART_MCR]);
+ W_REG(&regs[UART_MCR], UART_MCR_LOOP | 0x0a);
+ status1 = R_REG(&regs[UART_MSR]) & 0xf0;
+ W_REG(&regs[UART_MCR], save_mcr);
+
+ return (status1 == 0x90);
+}
+
+/*
+ * Initializes UART access. The callback function will be called once
+ * per found UART.
+*/
+void
+sb_serial_init(void *sbh, void (*add)(void *regs, uint irq, uint baud_base, uint reg_shift))
+{
+ void *regs;
+ ulong base;
+ uint irq;
+ int i, n;
+
+ if ((regs = sb_setcore(sbh, SB_EXTIF, 0))) {
+ extifregs_t *eir = (extifregs_t *) regs;
+ sbconfig_t *sb;
+
+ /* Determine external UART register base */
+ sb = (sbconfig_t *)((ulong) eir + SBCONFIGOFF);
+ base = EXTIF_CFGIF_BASE(sb_base(R_REG(&sb->sbadmatch1)));
+
+ /* Determine IRQ */
+ irq = sb_irq(sbh);
+
+ /* Disable GPIO interrupt initially */
+ W_REG(&eir->gpiointpolarity, 0);
+ W_REG(&eir->gpiointmask, 0);
+
+ /* Search for external UARTs */
+ n = 2;
+ for (i = 0; i < 2; i++) {
+ regs = (void *) REG_MAP(base + (i * 8), 8);
+ if (serial_exists(regs)) {
+ /* Set GPIO 1 to be the external UART IRQ */
+ W_REG(&eir->gpiointmask, 2);
+ if (add)
+ add(regs, irq, 13500000, 0);
+ }
+ }
+
+ /* Add internal UART if enabled */
+ if (R_REG(&eir->corecontrol) & CC_UE)
+ if (add)
+ add((void *) &eir->uartdata, irq, sb_clock(sbh), 2);
+ } else if ((regs = sb_setcore(sbh, SB_CC, 0))) {
+ chipcregs_t *cc = (chipcregs_t *) regs;
+ uint32 rev, cap, pll, baud_base, div;
+
+ /* Determine core revision and capabilities */
+ rev = sb_corerev(sbh);
+ cap = R_REG(&cc->capabilities);
+ pll = cap & CAP_PLL_MASK;
+
+ /* Determine IRQ */
+ irq = sb_irq(sbh);
+
+ if (pll == PLL_TYPE1) {
+ /* PLL clock */
+ baud_base = sb_clock_rate(pll,
+ R_REG(&cc->clockcontrol_n),
+ R_REG(&cc->clockcontrol_m2));
+ div = 1;
+ } else if (rev >= 3) {
+ /* Internal backplane clock */
+ baud_base = sb_clock_rate(pll,
+ R_REG(&cc->clockcontrol_n),
+ R_REG(&cc->clockcontrol_sb));
+ div = 2; /* Minimum divisor */
+ W_REG(&cc->clkdiv, ((R_REG(&cc->clkdiv) & ~CLKD_UART) | div));
+ } else {
+ /* Fixed internal backplane clock */
+ baud_base = 88000000;
+ div = 48;
+ }
+
+ /* Clock source depends on strapping if UartClkOverride is unset */
+ if ((rev > 0) && ((R_REG(&cc->corecontrol) & CC_UARTCLKO) == 0)) {
+ if ((cap & CAP_UCLKSEL) == CAP_UINTCLK) {
+ /* Internal divided backplane clock */
+ baud_base /= div;
+ } else {
+ /* Assume external clock of 1.8432 MHz */
+ baud_base = 1843200;
+ }
+ }
+
+ /* Add internal UARTs */
+ n = cap & CAP_UARTS_MASK;
+ for (i = 0; i < n; i++) {
+ /* Register offset changed after revision 0 */
+ if (rev)
+ regs = (void *)((ulong) &cc->uart0data + (i * 256));
+ else
+ regs = (void *)((ulong) &cc->uart0data + (i * 8));
+
+ if (add)
+ add(regs, irq, baud_base, 0);
+ }
+ }
+}
+
+/* Returns the SB interrupt flag of the current core. */
+uint32
+sb_flag(void *sbh)
+{
+ void *regs;
+ sbconfig_t *sb;
+
+ regs = sb_coreregs(sbh);
+ sb = (sbconfig_t *)((ulong) regs + SBCONFIGOFF);
+
+ return (R_REG(&sb->sbtpsflag) & SBTPS_NUM0_MASK);
+}
+
+static const uint32 sbips_int_mask[] = {
+ 0,
+ SBIPS_INT1_MASK,
+ SBIPS_INT2_MASK,
+ SBIPS_INT3_MASK,
+ SBIPS_INT4_MASK
+};
+
+static const uint32 sbips_int_shift[] = {
+ 0,
+ 0,
+ SBIPS_INT2_SHIFT,
+ SBIPS_INT3_SHIFT,
+ SBIPS_INT4_SHIFT
+};
+
+/*
+ * Returns the MIPS IRQ assignment of the current core. If unassigned,
+ * 0 is returned.
+ */
+uint
+sb_irq(void *sbh)
+{
+ uint idx;
+ void *regs;
+ sbconfig_t *sb;
+ uint32 flag, sbipsflag;
+ uint irq = 0;
+
+ flag = sb_flag(sbh);
+
+ idx = sb_coreidx(sbh);
+
+ if ((regs = sb_setcore(sbh, SB_MIPS, 0)) ||
+ (regs = sb_setcore(sbh, SB_MIPS33, 0))) {
+ sb = (sbconfig_t *)((ulong) regs + SBCONFIGOFF);
+
+ /* sbipsflag specifies which core is routed to interrupts 1 to 4 */
+ sbipsflag = R_REG(&sb->sbipsflag);
+ for (irq = 1; irq <= 4; irq++) {
+ if (((sbipsflag & sbips_int_mask[irq]) >> sbips_int_shift[irq]) == flag)
+ break;
+ }
+ if (irq == 5)
+ irq = 0;
+ }
+
+ sb_setcoreidx(sbh, idx);
+
+ return irq;
+}
+
+/* Clears the specified MIPS IRQ. */
+static void
+sb_clearirq(void *sbh, uint irq)
+{
+ void *regs;
+ sbconfig_t *sb;
+
+ if (!(regs = sb_setcore(sbh, SB_MIPS, 0)) &&
+ !(regs = sb_setcore(sbh, SB_MIPS33, 0)))
+ ASSERT(regs);
+ sb = (sbconfig_t *)((ulong) regs + SBCONFIGOFF);
+
+ if (irq == 0)
+ W_REG(&sb->sbintvec, 0);
+ else
+ OR_REG(&sb->sbipsflag, sbips_int_mask[irq]);
+}
+
+/*
+ * Assigns the specified MIPS IRQ to the specified core. Shared MIPS
+ * IRQ 0 may be assigned more than once.
+ */
+static void
+sb_setirq(void *sbh, uint irq, uint coreid, uint coreunit)
+{
+ void *regs;
+ sbconfig_t *sb;
+ uint32 flag;
+
+ regs = sb_setcore(sbh, coreid, coreunit);
+ ASSERT(regs);
+ flag = sb_flag(sbh);
+
+ if (!(regs = sb_setcore(sbh, SB_MIPS, 0)) &&
+ !(regs = sb_setcore(sbh, SB_MIPS33, 0)))
+ ASSERT(regs);
+ sb = (sbconfig_t *)((ulong) regs + SBCONFIGOFF);
+
+ if (irq == 0)
+ OR_REG(&sb->sbintvec, 1 << flag);
+ else {
+ flag <<= sbips_int_shift[irq];
+ ASSERT(!(flag & ~sbips_int_mask[irq]));
+ flag |= R_REG(&sb->sbipsflag) & ~sbips_int_mask[irq];
+ W_REG(&sb->sbipsflag, flag);
+ }
+}
+
+/*
+ * Initializes clocks and interrupts. SB and NVRAM access must be
+ * initialized prior to calling.
+ */
+void
+sb_mips_init(void *sbh)
+{
+ ulong hz, ns, tmp;
+ extifregs_t *eir;
+ chipcregs_t *cc;
+ char *value;
+ uint irq;
+
+ /* Figure out current SB clock speed */
+ if ((hz = sb_clock(sbh)) == 0)
+ hz = 100000000;
+ ns = 1000000000 / hz;
+
+ /* Setup external interface timing */
+ if ((eir = sb_setcore(sbh, SB_EXTIF, 0))) {
+ /* Initialize extif so we can get to the LEDs and external UART */
+ W_REG(&eir->prog_config, CF_EN);
+
+ /* Set timing for the flash */
+ tmp = CEIL(10, ns) << FW_W3_SHIFT; /* W3 = 10nS */
+ tmp = tmp | (CEIL(40, ns) << FW_W1_SHIFT); /* W1 = 40nS */
+ tmp = tmp | CEIL(120, ns); /* W0 = 120nS */
+ W_REG(&eir->prog_waitcount, tmp); /* 0x01020a0c for a 100Mhz clock */
+
+ /* Set programmable interface timing for external uart */
+ tmp = CEIL(10, ns) << FW_W3_SHIFT; /* W3 = 10nS */
+ tmp = tmp | (CEIL(20, ns) << FW_W2_SHIFT); /* W2 = 20nS */
+ tmp = tmp | (CEIL(100, ns) << FW_W1_SHIFT); /* W1 = 100nS */
+ tmp = tmp | CEIL(120, ns); /* W0 = 120nS */
+ W_REG(&eir->prog_waitcount, tmp); /* 0x01020a0c for a 100Mhz clock */
+ } else if ((cc = sb_setcore(sbh, SB_CC, 0))) {
+ /* Set timing for the flash */
+ tmp = CEIL(10, ns) << FW_W3_SHIFT; /* W3 = 10nS */
+ tmp |= CEIL(10, ns) << FW_W1_SHIFT; /* W1 = 10nS */
+ tmp |= CEIL(120, ns); /* W0 = 120nS */
+ W_REG(&cc->flash_waitcount, tmp);
+
+ W_REG(&cc->pcmcia_memwait, tmp);
+ }
+
+ /* Chip specific initialization */
+ switch (sb_chip(sbh)) {
+ case BCM4710_DEVICE_ID:
+ /* Clear interrupt map */
+ for (irq = 0; irq <= 4; irq++)
+ sb_clearirq(sbh, irq);
+ sb_setirq(sbh, 0, SB_CODEC, 0);
+ sb_setirq(sbh, 0, SB_EXTIF, 0);
+ sb_setirq(sbh, 2, SB_ENET, 1);
+ sb_setirq(sbh, 3, SB_ILINE20, 0);
+ sb_setirq(sbh, 4, SB_PCI, 0);
+ ASSERT(eir);
+ value = nvram_get("et0phyaddr");
+ if (value && !strcmp(value, "31")) {
+ /* Enable internal UART */
+ W_REG(&eir->corecontrol, CC_UE);
+ /* Give USB its own interrupt */
+ sb_setirq(sbh, 1, SB_USB, 0);
+ } else {
+ /* Disable internal UART */
+ W_REG(&eir->corecontrol, 0);
+ /* Give Ethernet its own interrupt */
+ sb_setirq(sbh, 1, SB_ENET, 0);
+ sb_setirq(sbh, 0, SB_USB, 0);
+ }
+ break;
+ case BCM4310_DEVICE_ID:
+ MTC0(C0_BROADCOM, 0, MFC0(C0_BROADCOM, 0) & ~(1 << 22));
+ break;
+ }
+}
+
+uint32
+sb_mips_clock(void *sbh)
+{
+ extifregs_t *eir;
+ chipcregs_t *cc;
+ uint32 n, m;
+ uint idx;
+ uint32 pll_type, rate = 0;
+
+ /* get index of the current core */
+ idx = sb_coreidx(sbh);
+ pll_type = PLL_TYPE1;
+
+ /* switch to extif or chipc core */
+ if ((eir = (extifregs_t *) sb_setcore(sbh, SB_EXTIF, 0))) {
+ n = R_REG(&eir->clockcontrol_n);
+ m = R_REG(&eir->clockcontrol_sb);
+ } else if ((cc = (chipcregs_t *) sb_setcore(sbh, SB_CC, 0))) {
+ pll_type = R_REG(&cc->capabilities) & CAP_PLL_MASK;
+ n = R_REG(&cc->clockcontrol_n);
+ if ((pll_type == PLL_TYPE2) || (pll_type == PLL_TYPE4))
+ m = R_REG(&cc->clockcontrol_mips);
+ else if (pll_type == PLL_TYPE3) {
+ rate = 200000000;
+ goto out;
+ } else
+ m = R_REG(&cc->clockcontrol_sb);
+ } else
+ goto out;
+
+ /* calculate rate */
+ rate = sb_clock_rate(pll_type, n, m);
+
+out:
+ /* switch back to previous core */
+ sb_setcoreidx(sbh, idx);
+
+ return rate;
+}
+
+static void
+icache_probe(int *size, int *lsize)
+{
+ uint32 config1;
+ uint sets, ways;
+
+ config1 = MFC0(C0_CONFIG, 1);
+
+ /* Instruction Cache Size = Associativity * Line Size * Sets Per Way */
+ if ((*lsize = ((config1 >> 19) & 7)))
+ *lsize = 2 << *lsize;
+ sets = 64 << ((config1 >> 22) & 7);
+ ways = 1 + ((config1 >> 16) & 7);
+ *size = *lsize * sets * ways;
+}
+
+#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4)
+
+static void
+handler(void)
+{
+ /* Step 11 */
+ __asm__ (
+ ".set\tmips32\n\t"
+ "ssnop\n\t"
+ "ssnop\n\t"
+ /* Disable interrupts */
+ /* MTC0(C0_STATUS, 0, MFC0(C0_STATUS, 0) & ~(ALLINTS | STO_IE)); */
+ "mfc0 $15, $12\n\t"
+ "and $15, $15, -31746\n\t"
+ "mtc0 $15, $12\n\t"
+ "eret\n\t"
+ "nop\n\t"
+ "nop\n\t"
+ ".set\tmips0"
+ );
+}
+
+/* The following MUST come right after handler() */
+static void
+afterhandler(void)
+{
+}
+
+/*
+ * Set the MIPS, backplane and PCI clocks as closely as possible.
+ */
+bool
+sb_mips_setclock(void *sbh, uint32 mipsclock, uint32 sbclock, uint32 pciclock)
+{
+ extifregs_t *eir = NULL;
+ chipcregs_t *cc = NULL;
+ mipsregs_t *mipsr = NULL;
+ volatile uint32 *clockcontrol_n, *clockcontrol_sb, *clockcontrol_pci;
+ uint32 orig_n, orig_sb, orig_pci, orig_m2, orig_mips, orig_ratio_parm, new_ratio;
+ uint32 pll_type, sync_mode;
+ uint idx, i;
+ typedef struct {
+ uint32 mipsclock;
+ uint16 n;
+ uint32 sb;
+ uint32 pci33;
+ uint32 pci25;
+ } n3m_table_t;
+ static n3m_table_t type1_table[] = {
+ { 96000000, 0x0303, 0x04020011, 0x11030011, 0x11050011 }, /* 96.000 32.000 24.000 */
+ { 100000000, 0x0009, 0x04020011, 0x11030011, 0x11050011 }, /* 100.000 33.333 25.000 */
+ { 104000000, 0x0802, 0x04020011, 0x11050009, 0x11090009 }, /* 104.000 31.200 24.960 */
+ { 108000000, 0x0403, 0x04020011, 0x11050009, 0x02000802 }, /* 108.000 32.400 24.923 */
+ { 112000000, 0x0205, 0x04020011, 0x11030021, 0x02000403 }, /* 112.000 32.000 24.889 */
+ { 115200000, 0x0303, 0x04020009, 0x11030011, 0x11050011 }, /* 115.200 32.000 24.000 */
+ { 120000000, 0x0011, 0x04020011, 0x11050011, 0x11090011 }, /* 120.000 30.000 24.000 */
+ { 124800000, 0x0802, 0x04020009, 0x11050009, 0x11090009 }, /* 124.800 31.200 24.960 */
+ { 128000000, 0x0305, 0x04020011, 0x11050011, 0x02000305 }, /* 128.000 32.000 24.000 */
+ { 132000000, 0x0603, 0x04020011, 0x11050011, 0x02000305 }, /* 132.000 33.000 24.750 */
+ { 136000000, 0x0c02, 0x04020011, 0x11090009, 0x02000603 }, /* 136.000 32.640 24.727 */
+ { 140000000, 0x0021, 0x04020011, 0x11050021, 0x02000c02 }, /* 140.000 30.000 24.706 */
+ { 144000000, 0x0405, 0x04020011, 0x01020202, 0x11090021 }, /* 144.000 30.857 24.686 */
+ { 150857142, 0x0605, 0x04020021, 0x02000305, 0x02000605 }, /* 150.857 33.000 24.000 */
+ { 152000000, 0x0e02, 0x04020011, 0x11050021, 0x02000e02 }, /* 152.000 32.571 24.000 */
+ { 156000000, 0x0802, 0x04020005, 0x11050009, 0x11090009 }, /* 156.000 31.200 24.960 */
+ { 160000000, 0x0309, 0x04020011, 0x11090011, 0x02000309 }, /* 160.000 32.000 24.000 */
+ { 163200000, 0x0c02, 0x04020009, 0x11090009, 0x02000603 }, /* 163.200 32.640 24.727 */
+ { 168000000, 0x0205, 0x04020005, 0x11030021, 0x02000403 }, /* 168.000 32.000 24.889 */
+ { 176000000, 0x0602, 0x04020003, 0x11050005, 0x02000602 }, /* 176.000 33.000 24.000 */
+ };
+ typedef struct {
+ uint32 mipsclock;
+ uint32 sbclock;
+ uint16 n;
+ uint32 sb;
+ uint32 pci33;
+ uint32 m2;
+ uint32 m3;
+ uint32 ratio;
+ uint32 ratio_parm;
+ } n4m_table_t;
+
+ static n4m_table_t type2_table[] = {
+ { 180000000, 80000000, 0x0403, 0x01010000, 0x01020300, 0x01020600, 0x05000100, 0x94, 0x012a0115 },
+ { 180000000, 90000000, 0x0403, 0x01000100, 0x01020300, 0x01000100, 0x05000100, 0x21, 0x0aaa0555 },
+ { 200000000, 100000000, 0x0303, 0x01000000, 0x01000600, 0x01000000, 0x05000000, 0x21, 0x0aaa0555 },
+ { 211200000, 105600000, 0x0902, 0x01000200, 0x01030400, 0x01000200, 0x05000200, 0x21, 0x0aaa0555 },
+ { 220800000, 110400000, 0x1500, 0x01000200, 0x01030400, 0x01000200, 0x05000200, 0x21, 0x0aaa0555 },
+ { 230400000, 115200000, 0x0604, 0x01000200, 0x01020600, 0x01000200, 0x05000200, 0x21, 0x0aaa0555 },
+ { 234000000, 104000000, 0x0b01, 0x01010000, 0x01010700, 0x01020600, 0x05000100, 0x94, 0x012a0115 },
+ { 240000000, 120000000, 0x0803, 0x01000200, 0x01020600, 0x01000200, 0x05000200, 0x21, 0x0aaa0555 },
+ { 252000000, 126000000, 0x0504, 0x01000100, 0x01020500, 0x01000100, 0x05000100, 0x21, 0x0aaa0555 },
+ { 264000000, 132000000, 0x0903, 0x01000200, 0x01020700, 0x01000200, 0x05000200, 0x21, 0x0aaa0555 },
+ { 270000000, 120000000, 0x0703, 0x01010000, 0x01030400, 0x01020600, 0x05000100, 0x94, 0x012a0115 },
+ { 276000000, 122666666, 0x1500, 0x01010000, 0x01030400, 0x01020600, 0x05000100, 0x94, 0x012a0115 },
+ { 280000000, 140000000, 0x0503, 0x01000000, 0x01010600, 0x01000000, 0x05000000, 0x21, 0x0aaa0555 },
+ { 288000000, 128000000, 0x0604, 0x01010000, 0x01030400, 0x01020600, 0x05000100, 0x94, 0x012a0115 },
+ { 288000000, 144000000, 0x0404, 0x01000000, 0x01010600, 0x01000000, 0x05000000, 0x21, 0x0aaa0555 },
+ { 300000000, 133333333, 0x0803, 0x01010000, 0x01020600, 0x01020600, 0x05000100, 0x94, 0x012a0115 },
+ { 300000000, 150000000, 0x0803, 0x01000100, 0x01020600, 0x01000100, 0x05000100, 0x21, 0x0aaa0555 }
+ };
+
+ static n4m_table_t type4_table[] = {
+ { 192000000, 96000000, 0x0702, 0x04020011, 0x11030011, 0x04020011, 0x04020003, 0x21, 0x0aaa0555 },
+ { 200000000, 100000000, 0x0009, 0x04020011, 0x11030011, 0x04020011, 0x04020003, 0x21, 0x0aaa0555 },
+ { 216000000, 108000000, 0x0111, 0x11020005, 0x01030303, 0x11020005, 0x04000005, 0x21, 0x0aaa0555 },
+ { 228000000, 101333333, 0x0e02, 0x11030003, 0x11210005, 0x11030305, 0x04000005, 0x94, 0x012a00a9 },
+ { 228000000, 114000000, 0x0e02, 0x11020005, 0x11210005, 0x11020005, 0x04000005, 0x21, 0x0aaa0555 },
+ { 240000000, 120000000, 0x0109, 0x11030002, 0x01050203, 0x11030002, 0x04000003, 0x21, 0x0aaa0555 },
+ { 252000000, 126000000, 0x0203, 0x04000005, 0x11050005, 0x04000005, 0x04000002, 0x21, 0x0aaa0555 },
+ { 264000000, 132000000, 0x0602, 0x04000005, 0x11050005, 0x04000005, 0x04000002, 0x21, 0x0aaa0555 },
+ { 272000000, 116571428, 0x0c02, 0x04000021, 0x02000909, 0x02000221, 0x04000003, 0x73, 0x254a14a9 },
+ { 280000000, 120000000, 0x0209, 0x04000021, 0x01030303, 0x02000221, 0x04000003, 0x73, 0x254a14a9 },
+ { 288000000, 123428571, 0x0111, 0x04000021, 0x01030303, 0x02000221, 0x04000003, 0x73, 0x254a14a9 },
+ { 300000000, 120000000, 0x0009, 0x04000009, 0x01030203, 0x02000902, 0x04000002, 0x52, 0x02520129 }
+ };
+ uint icache_size, ic_lsize;
+ ulong start, end, dst;
+ bool ret = FALSE;
+
+ /* get index of the current core */
+ idx = sb_coreidx(sbh);
+
+ /* switch to extif or chipc core */
+ if ((eir = (extifregs_t *) sb_setcore(sbh, SB_EXTIF, 0))) {
+ pll_type = PLL_TYPE1;
+ clockcontrol_n = &eir->clockcontrol_n;
+ clockcontrol_sb = &eir->clockcontrol_sb;
+ clockcontrol_pci = &eir->clockcontrol_pci;
+ } else if ((cc = (chipcregs_t *) sb_setcore(sbh, SB_CC, 0))) {
+ pll_type = R_REG(&cc->capabilities) & CAP_PLL_MASK;
+ clockcontrol_n = &cc->clockcontrol_n;
+ clockcontrol_sb = &cc->clockcontrol_sb;
+ clockcontrol_pci = &cc->clockcontrol_pci;
+ } else
+ goto done;
+
+ /* Store the current clock register values */
+ orig_n = R_REG(clockcontrol_n);
+ orig_sb = R_REG(clockcontrol_sb);
+ orig_pci = R_REG(clockcontrol_pci);
+
+ if (pll_type == PLL_TYPE1) {
+ /* Keep the current PCI clock if not specified */
+ if (pciclock == 0) {
+ pciclock = sb_clock_rate(pll_type, R_REG(clockcontrol_n), R_REG(clockcontrol_pci));
+ pciclock = (pciclock <= 25000000) ? 25000000 : 33000000;
+ }
+
+ /* Search for the closest MIPS clock less than or equal to a preferred value */
+ for (i = 0; i < ARRAYSIZE(type1_table); i++) {
+ ASSERT(type1_table[i].mipsclock ==
+ sb_clock_rate(pll_type, type1_table[i].n, type1_table[i].sb));
+ if (type1_table[i].mipsclock > mipsclock)
+ break;
+ }
+ if (i == 0) {
+ ret = FALSE;
+ goto done;
+ } else {
+ ret = TRUE;
+ i--;
+ }
+ ASSERT(type1_table[i].mipsclock <= mipsclock);
+
+ /* No PLL change */
+ if ((orig_n == type1_table[i].n) &&
+ (orig_sb == type1_table[i].sb) &&
+ (orig_pci == type1_table[i].pci33))
+ goto done;
+
+ /* Set the PLL controls */
+ W_REG(clockcontrol_n, type1_table[i].n);
+ W_REG(clockcontrol_sb, type1_table[i].sb);
+ if (pciclock == 25000000)
+ W_REG(clockcontrol_pci, type1_table[i].pci25);
+ else
+ W_REG(clockcontrol_pci, type1_table[i].pci33);
+
+ /* Reset */
+ sb_watchdog(sbh, 1);
+ while (1);
+ } else if ((pll_type == PLL_TYPE2) || (pll_type == PLL_TYPE4)) {
+ n4m_table_t *table = (pll_type == PLL_TYPE2) ? type2_table : type4_table;
+ uint tabsz = (pll_type == PLL_TYPE2) ? ARRAYSIZE(type2_table) : ARRAYSIZE(type4_table);
+
+ ASSERT(cc);
+
+ /* Store the current clock register values */
+ orig_m2 = R_REG(&cc->clockcontrol_m2);
+ orig_mips = R_REG(&cc->clockcontrol_mips);
+ orig_ratio_parm = 0;
+
+ /* Look up current ratio */
+ for (i = 0; i < tabsz; i++) {
+ if ((orig_n == table[i].n) &&
+ (orig_sb == table[i].sb) &&
+ (orig_pci == table[i].pci33) &&
+ (orig_m2 == table[i].m2) &&
+ (orig_mips == table[i].m3)) {
+ orig_ratio_parm = table[i].ratio_parm;
+ break;
+ }
+ }
+
+ /* Search for the closest MIPS clock greater or equal to a preferred value */
+ for (i = 0; i < tabsz; i++) {
+ ASSERT(table[i].mipsclock ==
+ sb_clock_rate(pll_type, table[i].n, table[i].m3));
+ if ((mipsclock <= table[i].mipsclock) &&
+ ((sbclock == 0) || (sbclock <= table[i].sbclock)))
+ break;
+ }
+ if (i == tabsz) {
+ ret = FALSE;
+ goto done;
+ } else {
+ ret = TRUE;
+ }
+
+ /* No PLL change */
+ if ((orig_n == table[i].n) &&
+ (orig_sb == table[i].sb) &&
+ (orig_pci == table[i].pci33) &&
+ (orig_m2 == table[i].m2) &&
+ (orig_mips == table[i].m3))
+ goto done;
+
+ /* Set the PLL controls */
+ W_REG(clockcontrol_n, table[i].n);
+ W_REG(clockcontrol_sb, table[i].sb);
+ W_REG(clockcontrol_pci, table[i].pci33);
+ W_REG(&cc->clockcontrol_m2, table[i].m2);
+ W_REG(&cc->clockcontrol_mips, table[i].m3);
+
+ /* No ratio change */
+ if (orig_ratio_parm == table[i].ratio_parm)
+ goto end_fill;
+
+ new_ratio = table[i].ratio_parm;
+
+ icache_probe(&icache_size, &ic_lsize);
+
+ /* Preload the code into the cache */
+ start = ((ulong) &&start_fill) & ~(ic_lsize - 1);
+ end = ((ulong) &&end_fill + (ic_lsize - 1)) & ~(ic_lsize - 1);
+ while (start < end) {
+ cache_unroll(start, Fill_I);
+ start += ic_lsize;
+ }
+
+ /* Copy the handler */
+ start = (ulong) &handler;
+ end = (ulong) &afterhandler;
+ dst = KSEG1ADDR(0x180);
+ for (i = 0; i < (end - start); i += 4)
+ *((ulong *)(dst + i)) = *((ulong *)(start + i));
+
+ /* Preload handler into the cache one line at a time */
+ for (i = 0; i < (end - start); i += 4)
+ cache_unroll(dst + i, Fill_I);
+
+ /* Clear BEV bit */
+ MTC0(C0_STATUS, 0, MFC0(C0_STATUS, 0) & ~ST0_BEV);
+
+ /* Enable interrupts */
+ MTC0(C0_STATUS, 0, MFC0(C0_STATUS, 0) | (ALLINTS | ST0_IE));
+
+ /* Enable MIPS timer interrupt */
+ if (!(mipsr = sb_setcore(sbh, SB_MIPS, 0)) &&
+ !(mipsr = sb_setcore(sbh, SB_MIPS33, 0)))
+ ASSERT(mipsr);
+ W_REG(&mipsr->intmask, 1);
+
+ start_fill:
+ /* step 1, set clock ratios */
+ MTC0(C0_BROADCOM, 3, new_ratio);
+ MTC0(C0_BROADCOM, 1, 8);
+
+ /* step 2: program timer intr */
+ W_REG(&mipsr->timer, 100);
+ (void) R_REG(&mipsr->timer);
+
+ /* step 3, switch to async */
+ sync_mode = MFC0(C0_BROADCOM, 4);
+ MTC0(C0_BROADCOM, 4, 1 << 22);
+
+ /* step 4, set cfg active */
+ MTC0(C0_BROADCOM, 2, 0x9);
+
+
+ /* steps 5 & 6 */
+ __asm__ __volatile__ (
+ ".set\tmips3\n\t"
+ "wait\n\t"
+ ".set\tmips0"
+ );
+
+ /* step 7, clear cfg_active */
+ MTC0(C0_BROADCOM, 2, 0);
+
+ /* Additional Step: set back to orig sync mode */
+ MTC0(C0_BROADCOM, 4, sync_mode);
+
+ /* step 8, fake soft reset */
+ MTC0(C0_BROADCOM, 5, MFC0(C0_BROADCOM, 5) | 4);
+
+ end_fill:
+ /* step 9 set watchdog timer */
+ sb_watchdog(sbh, 20);
+ (void) R_REG(&cc->chipid);
+
+ /* step 11 */
+ __asm__ __volatile__ (
+ ".set\tmips3\n\t"
+ "sync\n\t"
+ "wait\n\t"
+ ".set\tmips0"
+ );
+ while (1);
+ }
+
+done:
+ /* switch back to previous core */
+ sb_setcoreidx(sbh, idx);
+
+ return ret;
+}
+
+
+/* returns the ncdl value to be programmed into sdram_ncdl for calibration */
+uint32
+sb_memc_get_ncdl(void *sbh)
+{
+ sbmemcregs_t *memc;
+ uint32 ret = 0;
+ uint32 config, rd, wr, misc, dqsg, cd, sm, sd;
+ uint idx, rev;
+
+ idx = sb_coreidx(sbh);
+
+ memc = (sbmemcregs_t *)sb_setcore(sbh, SB_MEMC, 0);
+ if (memc == 0)
+ goto out;
+
+ rev = sb_corerev(sbh);
+
+ config = R_REG(&memc->config);
+ wr = R_REG(&memc->wrncdlcor);
+ rd = R_REG(&memc->rdncdlcor);
+ misc = R_REG(&memc->miscdlyctl);
+ dqsg = R_REG(&memc->dqsgatencdl);
+
+ rd &= MEMC_RDNCDLCOR_RD_MASK;
+ wr &= MEMC_WRNCDLCOR_WR_MASK;
+ dqsg &= MEMC_DQSGATENCDL_G_MASK;
+
+ if (config & MEMC_CONFIG_DDR) {
+ ret = (wr << 16) | (rd << 8) | dqsg;
+ } else {
+ if (rev > 0)
+ cd = rd;
+ else
+ cd = (rd == MEMC_CD_THRESHOLD) ? rd : (wr + MEMC_CD_THRESHOLD);
+ sm = (misc & MEMC_MISC_SM_MASK) >> MEMC_MISC_SM_SHIFT;
+ sd = (misc & MEMC_MISC_SD_MASK) >> MEMC_MISC_SD_SHIFT;
+ ret = (sm << 16) | (sd << 8) | cd;
+ }
+
+out:
+ /* switch back to previous core */
+ sb_setcoreidx(sbh, idx);
+
+ return ret;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 16:01:12 +0000