+++ /dev/null
-/*
- * Sonics Silicon Backplane
- * Broadcom MIPS core driver
- *
- * Copyright 2005, Broadcom Corporation
- * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
- *
- * Licensed under the GNU/GPL. See COPYING for details.
- */
-
-#include <linux/ssb/ssb.h>
-
-#include <linux/serial.h>
-#include <linux/serial_core.h>
-#include <linux/serial_reg.h>
-#include <linux/time.h>
-
-#include "ssb_private.h"
-
-
-static inline u32 mips_read32(struct ssb_mipscore *mcore,
- u16 offset)
-{
- return ssb_read32(mcore->dev, offset);
-}
-
-static inline void mips_write32(struct ssb_mipscore *mcore,
- u16 offset,
- u32 value)
-{
- ssb_write32(mcore->dev, offset, value);
-}
-
-static const u32 ipsflag_irq_mask[] = {
- 0,
- SSB_IPSFLAG_IRQ1,
- SSB_IPSFLAG_IRQ2,
- SSB_IPSFLAG_IRQ3,
- SSB_IPSFLAG_IRQ4,
-};
-
-static const u32 ipsflag_irq_shift[] = {
- 0,
- SSB_IPSFLAG_IRQ1_SHIFT,
- SSB_IPSFLAG_IRQ2_SHIFT,
- SSB_IPSFLAG_IRQ3_SHIFT,
- SSB_IPSFLAG_IRQ4_SHIFT,
-};
-
-static inline u32 ssb_irqflag(struct ssb_device *dev)
-{
- return ssb_read32(dev, SSB_TPSFLAG) & SSB_TPSFLAG_BPFLAG;
-}
-
-/* Get the MIPS IRQ assignment for a specified device.
- * If unassigned, 0 is returned.
- */
-unsigned int ssb_mips_irq(struct ssb_device *dev)
-{
- struct ssb_bus *bus = dev->bus;
- u32 irqflag;
- u32 ipsflag;
- u32 tmp;
- unsigned int irq;
-
- irqflag = ssb_irqflag(dev);
- ipsflag = ssb_read32(bus->mipscore.dev, SSB_IPSFLAG);
- for (irq = 1; irq <= 4; irq++) {
- tmp = ((ipsflag & ipsflag_irq_mask[irq]) >> ipsflag_irq_shift[irq]);
- if (tmp == irqflag)
- break;
- }
- if (irq == 5)
- irq = 0;
-
- return irq;
-}
-
-static void clear_irq(struct ssb_bus *bus, unsigned int irq)
-{
- struct ssb_device *dev = bus->mipscore.dev;
-
- /* Clear the IRQ in the MIPScore backplane registers */
- if (irq == 0) {
- ssb_write32(dev, SSB_INTVEC, 0);
- } else {
- ssb_write32(dev, SSB_IPSFLAG,
- ssb_read32(dev, SSB_IPSFLAG) |
- ipsflag_irq_mask[irq]);
- }
-}
-
-static void set_irq(struct ssb_device *dev, unsigned int irq)
-{
- unsigned int oldirq = ssb_mips_irq(dev);
- struct ssb_bus *bus = dev->bus;
- struct ssb_device *mdev = bus->mipscore.dev;
- u32 irqflag = ssb_irqflag(dev);
-
- dev->irq = irq + 2;
-
- ssb_dprintk(KERN_INFO PFX
- "set_irq: core 0x%04x, irq %d => %d\n",
- dev->id.coreid, oldirq, irq);
- /* clear the old irq */
- if (oldirq == 0)
- ssb_write32(mdev, SSB_INTVEC, (~(1 << irqflag) & ssb_read32(mdev, SSB_INTVEC)));
- else
- clear_irq(bus, oldirq);
-
- /* assign the new one */
- if (irq == 0)
- ssb_write32(mdev, SSB_INTVEC, ((1 << irqflag) & ssb_read32(mdev, SSB_INTVEC)));
-
- irqflag <<= ipsflag_irq_shift[irq];
- irqflag |= (ssb_read32(mdev, SSB_IPSFLAG) & ~ipsflag_irq_mask[irq]);
- ssb_write32(mdev, SSB_IPSFLAG, irqflag);
-}
-
-static void ssb_mips_serial_init(struct ssb_mipscore *mcore)
-{
- struct ssb_bus *bus = mcore->dev->bus;
-
- if (bus->extif.dev)
- mcore->nr_serial_ports = ssb_extif_serial_init(&bus->extif, mcore->serial_ports);
- else if (bus->chipco.dev)
- mcore->nr_serial_ports = ssb_chipco_serial_init(&bus->chipco, mcore->serial_ports);
- else
- mcore->nr_serial_ports = 0;
-}
-
-static void ssb_mips_flash_detect(struct ssb_mipscore *mcore)
-{
- struct ssb_bus *bus = mcore->dev->bus;
-
- mcore->flash_buswidth = 2;
- if (bus->chipco.dev) {
- mcore->flash_window = 0x1c000000;
- mcore->flash_window_size = 0x02000000;
- if ((ssb_read32(bus->chipco.dev, SSB_CHIPCO_FLASH_CFG)
- & SSB_CHIPCO_CFG_DS16) == 0)
- mcore->flash_buswidth = 1;
- } else {
- mcore->flash_window = 0x1fc00000;
- mcore->flash_window_size = 0x00400000;
- }
-}
-
-u32 ssb_cpu_clock(struct ssb_mipscore *mcore)
-{
- struct ssb_bus *bus = mcore->dev->bus;
- u32 pll_type, n, m, rate = 0;
-
- if (bus->extif.dev) {
- ssb_extif_get_clockcontrol(&bus->extif, &pll_type, &n, &m);
- } else if (bus->chipco.dev) {
- ssb_chipco_get_clockcpu(&bus->chipco, &pll_type, &n, &m);
- } else
- return 0;
-
- if ((pll_type == SSB_PLLTYPE_5) || (bus->chip_id == 0x5365)) {
- rate = 200000000;
- } else {
- rate = ssb_calc_clock_rate(pll_type, n, m);
- }
-
- if (pll_type == SSB_PLLTYPE_6) {
- rate *= 2;
- }
-
- return rate;
-}
-
-void ssb_mipscore_init(struct ssb_mipscore *mcore)
-{
- struct ssb_bus *bus;
- struct ssb_device *dev;
- unsigned long hz, ns;
- unsigned int irq, i;
-
- if (!mcore->dev)
- return; /* We don't have a MIPS core */
-
- ssb_dprintk(KERN_INFO PFX "Initializing MIPS core...\n");
-
- bus = mcore->dev->bus;
- hz = ssb_clockspeed(bus);
- if (!hz)
- hz = 100000000;
- ns = 1000000000 / hz;
-
- if (bus->extif.dev)
- ssb_extif_timing_init(&bus->extif, ns);
- else if (bus->chipco.dev)
- ssb_chipco_timing_init(&bus->chipco, ns);
-
- /* Assign IRQs to all cores on the bus, start with irq line 2, because serial usually takes 1 */
- for (irq = 2, i = 0; i < bus->nr_devices; i++) {
- dev = &(bus->devices[i]);
- dev->irq = ssb_mips_irq(dev) + 2;
- switch (dev->id.coreid) {
- case SSB_DEV_USB11_HOST:
- /* shouldn't need a separate irq line for non-4710, most of them have a proper
- * external usb controller on the pci */
- if ((bus->chip_id == 0x4710) && (irq <= 4)) {
- set_irq(dev, irq++);
- break;
- }
- /* fallthrough */
- case SSB_DEV_PCI:
- case SSB_DEV_ETHERNET:
- case SSB_DEV_80211:
- case SSB_DEV_USB20_HOST:
- /* These devices get their own IRQ line if available, the rest goes on IRQ0 */
- if (irq <= 4) {
- set_irq(dev, irq++);
- break;
- }
- }
- }
-
- ssb_mips_serial_init(mcore);
- ssb_mips_flash_detect(mcore);
-}
projects / openwrt.git / blobdiff