/*
- * BCM47XX support code for some chipcommon (old extif) facilities (uart)
+ * BCM47XX support code for some chipcommon facilities (uart, jtagm)
*
- * Copyright 2006, Broadcom Corporation
+ * Copyright 2007, Broadcom Corporation
* All Rights Reserved.
*
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
*
- * $Id: hndchipc.c,v 1.1.1.1 2006/02/27 03:43:16 honor Exp $
+ * $Id$
*/
#include <typedefs.h>
#include <bcmdefs.h>
#include <osl.h>
-#include <bcmutils.h>
#include <sbutils.h>
#include <bcmdevs.h>
#include <bcmnvram.h>
#include <sbconfig.h>
-#include <sbextif.h>
#include <sbchipc.h>
+#include <sbextif.h>
+#include <hndchipc.h>
#include <hndcpu.h>
-/*
- * Returns TRUE if an external UART exists at the given base
- * register.
+/* debug/trace */
+#define CC_ERROR(args)
+
+#ifdef BCMDBG
+#define CC_MSG(args) printf args
+#else
+#define CC_MSG(args)
+#endif /* BCMDBG */
+
+/* interested chipcommon interrupt source
+ * - GPIO
+ * - EXTIF
+ * - ECI
+ * - PMU
+ * - UART
*/
-static bool
-BCMINITFN(serial_exists)(osl_t *osh, uint8 *regs)
-{
+#define MAX_CC_INT_SOURCE 5
+
+/* chipc secondary isr info */
+typedef struct {
+ uint intmask; /* int mask */
+ cc_isr_fn isr; /* secondary isr handler */
+ void *cbdata; /* pointer to private data */
+} cc_isr_info_t;
+
+static cc_isr_info_t cc_isr_desc[MAX_CC_INT_SOURCE];
+
+/* chip common intmask */
+static uint32 cc_intmask = 0;
+
+static bool BCMINITFN(serial_exists) (osl_t * osh, uint8 * regs) {
uint8 save_mcr, status1;
save_mcr = R_REG(osh, ®s[UART_MCR]);
return (status1 == 0x90);
}
+static void __init sb_extif_serial_init(sb_t * sbh, void *regs,
+ sb_serial_init_fn add)
+{
+ osl_t *osh = sb_osh(sbh);
+ extifregs_t *eir = (extifregs_t *) regs;
+ sbconfig_t *sb;
+ ulong base;
+ uint irq;
+ int i, n;
+
+ /* Determine external UART register base */
+ sb = (sbconfig_t *) ((ulong) eir + SBCONFIGOFF);
+ base = EXTIF_CFGIF_BASE(sb_base(R_REG(osh, &sb->sbadmatch1)));
+
+ /* Determine IRQ */
+ irq = sb_irq(sbh);
+
+ /* Disable GPIO interrupt initially */
+ W_REG(osh, &eir->gpiointpolarity, 0);
+ W_REG(osh, &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(osh, regs)) {
+ /* Set GPIO 1 to be the external UART IRQ */
+ W_REG(osh, &eir->gpiointmask, 2);
+ /* XXXDetermine external UART clock */
+ if (add)
+ add(regs, irq, 13500000, 0);
+ }
+ }
+
+ /* Add internal UART if enabled */
+ if (R_REG(osh, &eir->corecontrol) & CC_UE)
+ if (add)
+ add((void *)&eir->uartdata, irq, sb_clock(sbh), 2);
+}
+
/*
* Initializes UART access. The callback function will be called once
* per found UART.
*/
-void
-BCMINITFN(sb_serial_init)(sb_t *sbh, void (*add)(void *regs, uint irq, uint baud_base,
- uint reg_shift))
-{
+void BCMINITFN(sb_serial_init) (sb_t * sbh, sb_serial_init_fn add) {
osl_t *osh;
void *regs;
- ulong base;
+ chipcregs_t *cc;
+ uint32 rev, cap, pll, baud_base, div;
uint irq;
int i, n;
osh = sb_osh(sbh);
- 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(osh, &sb->sbadmatch1)));
-
- /* Determine IRQ */
- irq = sb_irq(sbh);
-
- /* Disable GPIO interrupt initially */
- W_REG(osh, &eir->gpiointpolarity, 0);
- W_REG(osh, &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(osh, regs)) {
- /* Set GPIO 1 to be the external UART IRQ */
- W_REG(osh, &eir->gpiointmask, 2);
- /* XXXDetermine external UART clock */
- if (add)
- add(regs, irq, 13500000, 0);
- }
- }
+ regs = sb_setcore(sbh, SB_EXTIF, 0);
+ if (regs) {
+ sb_extif_serial_init(sbh, regs, add);
+ return;
+ }
- /* Add internal UART if enabled */
- if (R_REG(osh, &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;
+ cc = (chipcregs_t *) sb_setcore(sbh, SB_CC, 0);
+ ASSERT(cc);
- /* Determine core revision and capabilities */
- rev = sb_corerev(sbh);
- cap = R_REG(osh, &cc->capabilities);
- pll = cap & CAP_PLL_MASK;
+ /* Determine core revision and capabilities */
+ rev = sbh->ccrev;
+ cap = sbh->cccaps;
+ pll = cap & CC_CAP_PLL_MASK;
- /* Determine IRQ */
- irq = sb_irq(sbh);
+ /* Determine IRQ */
+ irq = sb_irq(sbh);
- if (pll == PLL_TYPE1) {
- /* PLL clock */
- baud_base = sb_clock_rate(pll,
- R_REG(osh, &cc->clockcontrol_n),
- R_REG(osh, &cc->clockcontrol_m2));
- div = 1;
- } else {
+ if (pll == PLL_TYPE1) {
+ /* PLL clock */
+ baud_base = sb_clock_rate(pll,
+ R_REG(osh, &cc->clockcontrol_n),
+ R_REG(osh, &cc->clockcontrol_m2));
+ div = 1;
+ } else {
+ /* 5354 chip common uart uses a constant clock
+ * frequency of 25MHz */
+ if (sb_corerev(sbh) == 20) {
+ /* Set the override bit so we don't divide it */
+ W_REG(osh, &cc->corecontrol, CC_UARTCLKO);
+ baud_base = 25000000;
+ } else if (rev >= 11 && rev != 15) {
/* Fixed ALP clock */
- if (rev >= 11 && rev != 15) {
- baud_base = 20000000;
- div = 1;
- /* Set the override bit so we don't divide it */
- W_REG(osh, &cc->corecontrol, CC_UARTCLKO);
- }
+ baud_base = sb_alp_clock(sbh);
+ div = 1;
+ /* Turn off UART clock before switching clock source */
+ if (rev >= 21)
+ AND_REG(osh, &cc->corecontrol, ~CC_UARTCLKEN);
+ /* Set the override bit so we don't divide it */
+ OR_REG(osh, &cc->corecontrol, CC_UARTCLKO);
+ if (rev >= 21)
+ OR_REG(osh, &cc->corecontrol, CC_UARTCLKEN);
+ } else if (rev >= 3) {
/* Internal backplane clock */
- else if (rev >= 3) {
- baud_base = sb_clock(sbh);
- div = 2; /* Minimum divisor */
- W_REG(osh, &cc->clkdiv,
- ((R_REG(osh, &cc->clkdiv) & ~CLKD_UART) | div));
- }
+ baud_base = sb_clock(sbh);
+ div = 2; /* Minimum divisor */
+ W_REG(osh, &cc->clkdiv,
+ ((R_REG(osh, &cc->clkdiv) & ~CLKD_UART) | div));
+ } else {
/* Fixed internal backplane clock */
- else {
- baud_base = 88000000;
- div = 48;
- }
+ baud_base = 88000000;
+ div = 48;
+ }
- /* Clock source depends on strapping if UartClkOverride is unset */
- if ((rev > 0) &&
- ((R_REG(osh, &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;
- }
+ /* Clock source depends on strapping if UartClkOverride is unset */
+ if ((rev > 0)
+ && ((R_REG(osh, &cc->corecontrol) & CC_UARTCLKO) == 0)) {
+ if ((cap & CC_CAP_UCLKSEL) == CC_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));
+ /* Add internal UARTs */
+ n = cap & CC_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);
+ if (add)
+ add(regs, irq, baud_base, 0);
+ }
+}
+
+#if 0
+/*
+ * Initialize jtag master and return handle for
+ * jtag_rwreg. Returns NULL on failure.
+ */
+void *sb_jtagm_init(sb_t * sbh, uint clkd, bool exttap)
+{
+ void *regs;
+
+ if ((regs = sb_setcore(sbh, SB_CC, 0)) != NULL) {
+ chipcregs_t *cc = (chipcregs_t *) regs;
+ uint32 tmp;
+
+ /*
+ * Determine jtagm availability from
+ * core revision and capabilities.
+ */
+
+ /*
+ * Corerev 10 has jtagm, but the only chip
+ * with it does not have a mips, and
+ * the layout of the jtagcmd register is
+ * different. We'll only accept >= 11.
+ */
+ if (sbh->ccrev < 11)
+ return (NULL);
+
+ if ((sbh->cccaps & CC_CAP_JTAGP) == 0)
+ return (NULL);
+
+ /* Set clock divider if requested */
+ if (clkd != 0) {
+ tmp = R_REG(osh, &cc->clkdiv);
+ tmp =
+ (tmp & ~CLKD_JTAG) | ((clkd << CLKD_JTAG_SHIFT) &
+ CLKD_JTAG);
+ W_REG(osh, &cc->clkdiv, tmp);
}
+
+ /* Enable jtagm */
+ tmp = JCTRL_EN | (exttap ? JCTRL_EXT_EN : 0);
+ W_REG(osh, &cc->jtagctrl, tmp);
}
+
+ return (regs);
+}
+
+void sb_jtagm_disable(osl_t * osh, void *h)
+{
+ chipcregs_t *cc = (chipcregs_t *) h;
+
+ W_REG(osh, &cc->jtagctrl, R_REG(osh, &cc->jtagctrl) & ~JCTRL_EN);
}
+/*
+ * Read/write a jtag register. Assumes a target with
+ * 8 bit IR and 32 bit DR.
+ */
+#define IRWIDTH 8 /* Default Instruction Register width */
+#define DRWIDTH 32 /* Default Data Register width */
+
+uint32 jtag_rwreg(osl_t * osh, void *h, uint32 ir, uint32 dr)
+{
+ chipcregs_t *cc = (chipcregs_t *) h;
+ uint32 tmp;
+
+ W_REG(osh, &cc->jtagir, ir);
+ W_REG(osh, &cc->jtagdr, dr);
+ tmp = JCMD_START | JCMD_ACC_IRDR |
+ ((IRWIDTH - 1) << JCMD_IRW_SHIFT) | (DRWIDTH - 1);
+ W_REG(osh, &cc->jtagcmd, tmp);
+ while (((tmp = R_REG(osh, &cc->jtagcmd)) & JCMD_BUSY) == JCMD_BUSY) {
+ /* OSL_DELAY(1); */
+ }
+
+ tmp = R_REG(osh, &cc->jtagdr);
+ return (tmp);
+}
+#endif
+
+/*
+ * Interface to register chipc secondary isr
+ */
+bool
+BCMINITFN(sb_cc_register_isr) (sb_t * sbh, cc_isr_fn isr, uint32 ccintmask,
+ void *cbdata) {
+ bool done = FALSE;
+ chipcregs_t *regs;
+ uint origidx;
+ uint i;
+
+ /* Save the current core index */
+ origidx = sb_coreidx(sbh);
+ regs = sb_setcore(sbh, SB_CC, 0);
+ ASSERT(regs);
+
+ for (i = 0; i < MAX_CC_INT_SOURCE; i++) {
+ if (cc_isr_desc[i].isr == NULL) {
+ cc_isr_desc[i].isr = isr;
+ cc_isr_desc[i].cbdata = cbdata;
+ cc_isr_desc[i].intmask = ccintmask;
+ done = TRUE;
+ break;
+ }
+ }
+
+ if (done) {
+ cc_intmask = R_REG(sb_osh(sbh), ®s->intmask);
+ cc_intmask |= ccintmask;
+ W_REG(sb_osh(sbh), ®s->intmask, cc_intmask);
+ }
+
+ /* restore original coreidx */
+ sb_setcoreidx(sbh, origidx);
+ return done;
+}
+
+/*
+ * chipc primary interrupt handler
+ */
+void sb_cc_isr(sb_t * sbh, chipcregs_t * regs)
+{
+ uint32 ccintstatus;
+ uint32 intstatus;
+ uint32 i;
+
+ /* prior to rev 21 chipc interrupt means uart and gpio */
+ if (sbh->ccrev >= 21)
+ ccintstatus = R_REG(sb_osh(sbh), ®s->intstatus) & cc_intmask;
+ else
+ ccintstatus = (CI_UART | CI_GPIO);
+
+ for (i = 0; i < MAX_CC_INT_SOURCE; i++) {
+ if ((cc_isr_desc[i].isr != NULL) &&
+ (intstatus = (cc_isr_desc[i].intmask & ccintstatus))) {
+ (cc_isr_desc[i].isr) (cc_isr_desc[i].cbdata, intstatus);
+ }
+ }
+}
projects / openwrt.git / blobdiff