aboutsummaryrefslogtreecommitdiffstats
path: root/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbpci.c
diff options
context:
space:
mode:
Diffstat (limited to 'package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbpci.c')
-rw-r--r--package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbpci.c563
1 files changed, 563 insertions, 0 deletions
diff --git a/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbpci.c b/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbpci.c
new file mode 100644
index 0000000000..b3469134eb
--- /dev/null
+++ b/package/linux/kernel-source/arch/mips/brcm-boards/bcm947xx/sbpci.c
@@ -0,0 +1,563 @@
+/*
+ * Low-Level PCI and SB support for BCM47xx
+ *
+ * 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 <pcicfg.h>
+#include <bcmdevs.h>
+#include <sbconfig.h>
+#include <sbpci.h>
+#include <osl.h>
+#include <bcmendian.h>
+#include <bcmutils.h>
+#include <sbutils.h>
+#include <bcmnvram.h>
+#include <hndmips.h>
+
+/* Can free sbpci_init() memory after boot */
+#ifndef linux
+#define __init
+#endif
+
+/* Emulated configuration space */
+static pci_config_regs sb_config_regs[SB_MAXCORES];
+
+/* Banned cores */
+static uint16 pci_ban[32] = { 0 };
+static uint pci_banned = 0;
+
+/* CardBus mode */
+static bool cardbus = FALSE;
+
+/* Disable PCI host core */
+static bool pci_disabled = FALSE;
+
+/*
+ * Functions for accessing external PCI configuration space
+ */
+
+/* Assume one-hot slot wiring */
+#define PCI_SLOT_MAX 16
+
+static uint32
+config_cmd(void *sbh, uint bus, uint dev, uint func, uint off)
+{
+ uint coreidx;
+ sbpciregs_t *regs;
+ uint32 addr = 0;
+
+ /* CardBusMode supports only one device */
+ if (cardbus && dev > 1)
+ return 0;
+
+ coreidx = sb_coreidx(sbh);
+ regs = (sbpciregs_t *) sb_setcore(sbh, SB_PCI, 0);
+
+ /* Type 0 transaction */
+ if (bus == 1) {
+ /* Skip unwired slots */
+ if (dev < PCI_SLOT_MAX) {
+ /* Slide the PCI window to the appropriate slot */
+ W_REG(&regs->sbtopci1, SBTOPCI_CFG0 | ((1 << (dev + 16)) & SBTOPCI1_MASK));
+ addr = SB_PCI_CFG | ((1 << (dev + 16)) & ~SBTOPCI1_MASK) |
+ (func << 8) | (off & ~3);
+ }
+ }
+
+ /* Type 1 transaction */
+ else {
+ W_REG(&regs->sbtopci1, SBTOPCI_CFG1);
+ addr = SB_PCI_CFG | (bus << 16) | (dev << 11) | (func << 8) | (off & ~3);
+ }
+
+ sb_setcoreidx(sbh, coreidx);
+
+ return addr;
+}
+
+static int
+extpci_read_config(void *sbh, uint bus, uint dev, uint func, uint off, void *buf, int len)
+{
+ uint32 addr, *reg = NULL, val;
+ int ret = 0;
+
+ if (pci_disabled ||
+ !(addr = config_cmd(sbh, bus, dev, func, off)) ||
+ !(reg = (uint32 *) REG_MAP(addr, len)) ||
+ BUSPROBE(val, reg))
+ val = 0xffffffff;
+
+ val >>= 8 * (off & 3);
+ if (len == 4)
+ *((uint32 *) buf) = val;
+ else if (len == 2)
+ *((uint16 *) buf) = (uint16) val;
+ else if (len == 1)
+ *((uint8 *) buf) = (uint8) val;
+ else
+ ret = -1;
+
+ if (reg)
+ REG_UNMAP(reg);
+
+ return ret;
+}
+
+static int
+extpci_write_config(void *sbh, uint bus, uint dev, uint func, uint off, void *buf, int len)
+{
+ uint32 addr, *reg = NULL, val;
+ int ret = 0;
+
+ if (pci_disabled ||
+ !(addr = config_cmd(sbh, bus, dev, func, off)) ||
+ !(reg = (uint32 *) REG_MAP(addr, len)) ||
+ BUSPROBE(val, reg))
+ goto done;
+
+ if (len == 4)
+ val = *((uint32 *) buf);
+ else if (len == 2) {
+ val &= ~(0xffff << (8 * (off & 3)));
+ val |= *((uint16 *) buf) << (8 * (off & 3));
+ } else if (len == 1) {
+ val &= ~(0xff << (8 * (off & 3)));
+ val |= *((uint8 *) buf) << (8 * (off & 3));
+ } else
+ ret = -1;
+
+ W_REG(reg, val);
+
+ done:
+ if (reg)
+ REG_UNMAP(reg);
+
+ return ret;
+}
+
+/*
+ * Functions for accessing translated SB configuration space
+ */
+
+static int
+sb_read_config(void *sbh, uint bus, uint dev, uint func, uint off, void *buf, int len)
+{
+ pci_config_regs *cfg;
+
+ if (dev >= SB_MAXCORES || (off + len) > sizeof(pci_config_regs))
+ return -1;
+ cfg = &sb_config_regs[dev];
+
+ ASSERT(ISALIGNED(off, len));
+ ASSERT(ISALIGNED(buf, len));
+
+ if (len == 4)
+ *((uint32 *) buf) = ltoh32(*((uint32 *)((ulong) cfg + off)));
+ else if (len == 2)
+ *((uint16 *) buf) = ltoh16(*((uint16 *)((ulong) cfg + off)));
+ else if (len == 1)
+ *((uint8 *) buf) = *((uint8 *)((ulong) cfg + off));
+ else
+ return -1;
+
+ return 0;
+}
+
+static int
+sb_write_config(void *sbh, uint bus, uint dev, uint func, uint off, void *buf, int len)
+{
+ uint coreidx, n;
+ void *regs;
+ sbconfig_t *sb;
+ pci_config_regs *cfg;
+
+ if (dev >= SB_MAXCORES || (off + len) > sizeof(pci_config_regs))
+ return -1;
+ cfg = &sb_config_regs[dev];
+
+ ASSERT(ISALIGNED(off, len));
+ ASSERT(ISALIGNED(buf, len));
+
+ /* Emulate BAR sizing */
+ if (off >= OFFSETOF(pci_config_regs, base[0]) && off <= OFFSETOF(pci_config_regs, base[3]) &&
+ len == 4 && *((uint32 *) buf) == ~0) {
+ coreidx = sb_coreidx(sbh);
+ if ((regs = sb_setcoreidx(sbh, dev))) {
+ sb = (sbconfig_t *)((ulong) regs + SBCONFIGOFF);
+ /* Highest numbered address match register */
+ n = (R_REG(&sb->sbidlow) & SBIDL_AR_MASK) >> SBIDL_AR_SHIFT;
+ if (off == OFFSETOF(pci_config_regs, base[0]))
+ cfg->base[0] = ~(sb_size(R_REG(&sb->sbadmatch0)) - 1);
+ else if (off == OFFSETOF(pci_config_regs, base[1]) && n >= 1)
+ cfg->base[1] = ~(sb_size(R_REG(&sb->sbadmatch1)) - 1);
+ else if (off == OFFSETOF(pci_config_regs, base[2]) && n >= 2)
+ cfg->base[2] = ~(sb_size(R_REG(&sb->sbadmatch2)) - 1);
+ else if (off == OFFSETOF(pci_config_regs, base[3]) && n >= 3)
+ cfg->base[3] = ~(sb_size(R_REG(&sb->sbadmatch3)) - 1);
+ }
+ sb_setcoreidx(sbh, coreidx);
+ return 0;
+ }
+
+ if (len == 4)
+ *((uint32 *)((ulong) cfg + off)) = htol32(*((uint32 *) buf));
+ else if (len == 2)
+ *((uint16 *)((ulong) cfg + off)) = htol16(*((uint16 *) buf));
+ else if (len == 1)
+ *((uint8 *)((ulong) cfg + off)) = *((uint8 *) buf);
+ else
+ return -1;
+
+ return 0;
+}
+
+int
+sbpci_read_config(void *sbh, uint bus, uint dev, uint func, uint off, void *buf, int len)
+{
+ if (bus == 0)
+ return sb_read_config(sbh, bus, dev, func, off, buf, len);
+ else
+ return extpci_read_config(sbh, bus, dev, func, off, buf, len);
+}
+
+int
+sbpci_write_config(void *sbh, uint bus, uint dev, uint func, uint off, void *buf, int len)
+{
+ if (bus == 0)
+ return sb_write_config(sbh, bus, dev, func, off, buf, len);
+ else
+ return extpci_write_config(sbh, bus, dev, func, off, buf, len);
+}
+
+void
+sbpci_ban(uint16 core)
+{
+ if (pci_banned < ARRAYSIZE(pci_ban))
+ pci_ban[pci_banned++] = core;
+}
+//#define CT4712_WR 1 /* Workaround for 4712 */
+
+int __init
+sbpci_init(void *sbh)
+{
+ uint chip, chiprev, chippkg, coreidx, host, i;
+ uint32 boardflags;
+ sbpciregs_t *pci;
+ sbconfig_t *sb;
+ pci_config_regs *cfg;
+ void *regs;
+ char varname[8];
+ int CT4712_WR;
+ uint wlidx = 0;
+ uint16 vendor, core;
+ uint8 class, subclass, progif;
+ uint32 val;
+ uint32 sbips_int_mask[] = { 0, SBIPS_INT1_MASK, SBIPS_INT2_MASK, SBIPS_INT3_MASK, SBIPS_INT4_MASK };
+ uint32 sbips_int_shift[] = { 0, 0, SBIPS_INT2_SHIFT, SBIPS_INT3_SHIFT, SBIPS_INT4_SHIFT };
+
+ chip = sb_chip(sbh);
+ chiprev = sb_chiprev(sbh);
+ chippkg = sb_chippkg(sbh);
+ coreidx = sb_coreidx(sbh);
+
+ if (!(pci = (sbpciregs_t *) sb_setcore(sbh, SB_PCI, 0)))
+ return -1;
+ sb_core_reset(sbh, 0);
+
+ /* In some board, */
+ if(nvram_match("boardtype", "bcm94710dev"))
+ CT4712_WR = 0;
+ else
+ CT4712_WR = 1;
+
+ boardflags = (uint32) getintvar(NULL, "boardflags");
+
+ if ((chip == BCM4310_DEVICE_ID) && (chiprev == 0))
+ pci_disabled = TRUE;
+
+ /*
+ * The 200-pin BCM4712 package does not bond out PCI. Even when
+ * PCI is bonded out, some boards may leave the pins
+ * floating.
+ */
+ if (((chip == BCM4712_DEVICE_ID) && (chippkg == BCM4712SMALL_PKG_ID)) ||
+ (boardflags & BFL_NOPCI) || CT4712_WR)
+ pci_disabled = TRUE;
+
+ /*
+ * If the PCI core should not be touched (disabled, not bonded
+ * out, or pins floating), do not even attempt to access core
+ * registers. Otherwise, try to determine if it is in host
+ * mode.
+ */
+ if (pci_disabled)
+ host = 0;
+ else
+ host = !BUSPROBE(val, &pci->control);
+
+ if (!host) {
+ /* Disable PCI interrupts in client mode */
+ sb = (sbconfig_t *)((ulong) pci + SBCONFIGOFF);
+ W_REG(&sb->sbintvec, 0);
+
+ /* Disable the PCI bridge in client mode */
+ sbpci_ban(SB_PCI);
+ printf("PCI: Disabled\n");
+ } else {
+ /* Reset the external PCI bus and enable the clock */
+ W_REG(&pci->control, 0x5); /* enable the tristate drivers */
+ W_REG(&pci->control, 0xd); /* enable the PCI clock */
+ OSL_DELAY(150); /* delay > 100 us */
+ W_REG(&pci->control, 0xf); /* deassert PCI reset */
+ W_REG(&pci->arbcontrol, PCI_INT_ARB); /* use internal arbiter */
+ OSL_DELAY(1); /* delay 1 us */
+
+ /* Enable CardBusMode */
+ cardbus = nvram_match("cardbus", "1");
+ if (cardbus) {
+ printf("PCI: Enabling CardBus\n");
+ /* GPIO 1 resets the CardBus device on bcm94710ap */
+ sb_gpioout(sbh, 1, 1);
+ sb_gpioouten(sbh, 1, 1);
+ W_REG(&pci->sprom[0], R_REG(&pci->sprom[0]) | 0x400);
+ }
+
+ /* 64 MB I/O access window */
+ W_REG(&pci->sbtopci0, SBTOPCI_IO);
+ /* 64 MB configuration access window */
+ W_REG(&pci->sbtopci1, SBTOPCI_CFG0);
+ /* 1 GB memory access window */
+ W_REG(&pci->sbtopci2, SBTOPCI_MEM | SB_PCI_DMA);
+
+ /* Enable PCI bridge BAR0 prefetch and burst */
+ val = 6;
+ sbpci_write_config(sbh, 1, 0, 0, PCI_CFG_CMD, &val, sizeof(val));
+
+ /* Enable PCI interrupts */
+ W_REG(&pci->intmask, PCI_INTA);
+ }
+
+ /* Scan the SB bus */
+ bzero(sb_config_regs, sizeof(sb_config_regs));
+ for (cfg = sb_config_regs; cfg < &sb_config_regs[SB_MAXCORES]; cfg++) {
+ cfg->vendor = 0xffff;
+ if (!(regs = sb_setcoreidx(sbh, cfg - sb_config_regs)))
+ continue;
+ sb = (sbconfig_t *)((ulong) regs + SBCONFIGOFF);
+
+ /* Read ID register and parse vendor and core */
+ val = R_REG(&sb->sbidhigh);
+ vendor = (val & SBIDH_VC_MASK) >> SBIDH_VC_SHIFT;
+ core = (val & SBIDH_CC_MASK) >> SBIDH_CC_SHIFT;
+ progif = 0;
+
+ /* Check if this core is banned */
+ for (i = 0; i < pci_banned; i++)
+ if (core == pci_ban[i])
+ break;
+ if (i < pci_banned)
+ continue;
+
+ /* Known vendor translations */
+ switch (vendor) {
+ case SB_VEND_BCM:
+ vendor = VENDOR_BROADCOM;
+ break;
+ }
+
+ /* Determine class based on known core codes */
+ switch (core) {
+ case SB_ILINE20:
+ class = PCI_CLASS_NET;
+ subclass = PCI_NET_ETHER;
+ core = BCM47XX_ILINE_ID;
+ break;
+ case SB_ILINE100:
+ class = PCI_CLASS_NET;
+ subclass = PCI_NET_ETHER;
+ core = BCM4610_ILINE_ID;
+ break;
+ case SB_ENET:
+ class = PCI_CLASS_NET;
+ subclass = PCI_NET_ETHER;
+ core = BCM47XX_ENET_ID;
+ break;
+ case SB_SDRAM:
+ case SB_MEMC:
+ class = PCI_CLASS_MEMORY;
+ subclass = PCI_MEMORY_RAM;
+ break;
+ case SB_PCI:
+ class = PCI_CLASS_BRIDGE;
+ subclass = PCI_BRIDGE_PCI;
+ break;
+ case SB_MIPS:
+ case SB_MIPS33:
+ class = PCI_CLASS_CPU;
+ subclass = PCI_CPU_MIPS;
+ break;
+ case SB_CODEC:
+ class = PCI_CLASS_COMM;
+ subclass = PCI_COMM_MODEM;
+ core = BCM47XX_V90_ID;
+ break;
+ case SB_USB:
+ class = PCI_CLASS_SERIAL;
+ subclass = PCI_SERIAL_USB;
+ progif = 0x10; /* OHCI */
+ core = BCM47XX_USB_ID;
+ break;
+ case SB_USB11H:
+ class = PCI_CLASS_SERIAL;
+ subclass = PCI_SERIAL_USB;
+ progif = 0x10; /* OHCI */
+ core = BCM47XX_USBH_ID;
+ break;
+ case SB_USB11D:
+ class = PCI_CLASS_SERIAL;
+ subclass = PCI_SERIAL_USB;
+ core = BCM47XX_USBD_ID;
+ break;
+ case SB_IPSEC:
+ class = PCI_CLASS_CRYPT;
+ subclass = PCI_CRYPT_NETWORK;
+ core = BCM47XX_IPSEC_ID;
+ break;
+ case SB_EXTIF:
+ case SB_CC:
+ class = PCI_CLASS_MEMORY;
+ subclass = PCI_MEMORY_FLASH;
+ break;
+ case SB_D11:
+ class = PCI_CLASS_NET;
+ subclass = PCI_NET_OTHER;
+ /* Let an nvram variable override this */
+ sprintf(varname, "wl%did", wlidx);
+ wlidx++;
+ if ((core = getintvar(NULL, varname)) == 0) {
+ if (chip == BCM4712_DEVICE_ID) {
+ if (chippkg == BCM4712SMALL_PKG_ID)
+ core = BCM4306_D11G_ID;
+ else
+ core = BCM4306_D11DUAL_ID;
+ } else {
+ /* 4310 */
+ core = BCM4310_D11B_ID;
+ }
+ }
+ break;
+
+ default:
+ class = subclass = progif = 0xff;
+ break;
+ }
+
+ /* Supported translations */
+ cfg->vendor = htol16(vendor);
+ cfg->device = htol16(core);
+ cfg->rev_id = chiprev;
+ cfg->prog_if = progif;
+ cfg->sub_class = subclass;
+ cfg->base_class = class;
+ cfg->base[0] = htol32(sb_base(R_REG(&sb->sbadmatch0)));
+ cfg->base[1] = htol32(sb_base(R_REG(&sb->sbadmatch1)));
+ cfg->base[2] = htol32(sb_base(R_REG(&sb->sbadmatch2)));
+ cfg->base[3] = htol32(sb_base(R_REG(&sb->sbadmatch3)));
+ cfg->base[4] = 0;
+ cfg->base[5] = 0;
+ if (class == PCI_CLASS_BRIDGE && subclass == PCI_BRIDGE_PCI)
+ cfg->header_type = PCI_HEADER_BRIDGE;
+ else
+ cfg->header_type = PCI_HEADER_NORMAL;
+ /* Save core interrupt flag */
+ cfg->int_pin = R_REG(&sb->sbtpsflag) & SBTPS_NUM0_MASK;
+ /* Default to MIPS shared interrupt 0 */
+ cfg->int_line = 0;
+ /* MIPS sbipsflag maps core interrupt flags to interrupts 1 through 4 */
+ if ((regs = sb_setcore(sbh, SB_MIPS, 0)) ||
+ (regs = sb_setcore(sbh, SB_MIPS33, 0))) {
+ sb = (sbconfig_t *)((ulong) regs + SBCONFIGOFF);
+ val = R_REG(&sb->sbipsflag);
+ for (cfg->int_line = 1; cfg->int_line <= 4; cfg->int_line++) {
+ if (((val & sbips_int_mask[cfg->int_line]) >> sbips_int_shift[cfg->int_line]) == cfg->int_pin)
+ break;
+ }
+ if (cfg->int_line > 4)
+ cfg->int_line = 0;
+ }
+ /* Emulated core */
+ *((uint32 *) &cfg->sprom_control) = 0xffffffff;
+ }
+
+ sb_setcoreidx(sbh, coreidx);
+ return 0;
+}
+
+void
+sbpci_check(void *sbh)
+{
+ uint coreidx;
+ sbpciregs_t *pci;
+ uint32 sbtopci1;
+ uint32 buf[64], *ptr, i;
+ ulong pa;
+ volatile uint j;
+
+ coreidx = sb_coreidx(sbh);
+ pci = (sbpciregs_t *) sb_setcore(sbh, SB_PCI, 0);
+
+ /* Clear the test array */
+ pa = (ulong) DMA_MAP(NULL, buf, sizeof(buf), DMA_RX, NULL);
+ ptr = (uint32 *) OSL_UNCACHED(&buf[0]);
+ memset(ptr, 0, sizeof(buf));
+
+ /* Point PCI window 1 to memory */
+ sbtopci1 = R_REG(&pci->sbtopci1);
+ W_REG(&pci->sbtopci1, SBTOPCI_MEM | (pa & SBTOPCI1_MASK));
+
+ /* Fill the test array via PCI window 1 */
+ ptr = (uint32 *) REG_MAP(SB_PCI_CFG + (pa & ~SBTOPCI1_MASK), sizeof(buf));
+ for (i = 0; i < ARRAYSIZE(buf); i++) {
+ for (j = 0; j < 2; j++);
+ W_REG(&ptr[i], i);
+ }
+ REG_UNMAP(ptr);
+
+ /* Restore PCI window 1 */
+ W_REG(&pci->sbtopci1, sbtopci1);
+
+ /* Check the test array */
+ DMA_UNMAP(NULL, pa, sizeof(buf), DMA_RX, NULL);
+ ptr = (uint32 *) OSL_UNCACHED(&buf[0]);
+ for (i = 0; i < ARRAYSIZE(buf); i++) {
+ if (ptr[i] != i)
+ break;
+ }
+
+ /* Change the clock if the test fails */
+ if (i < ARRAYSIZE(buf)) {
+ uint32 req, cur;
+
+ cur = sb_clock(sbh);
+ printf("PCI: Test failed at %d MHz\n", (cur + 500000) / 1000000);
+ for (req = 104000000; req < 176000000; req += 4000000) {
+ printf("PCI: Resetting to %d MHz\n", (req + 500000) / 1000000);
+ /* This will only reset if the clocks are valid and have changed */
+ sb_mips_setclock(sbh, req, 0, 0);
+ }
+ /* Should not reach here */
+ ASSERT(0);
+ }
+
+ sb_setcoreidx(sbh, coreidx);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-20 06:53:16 +0000