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![Shaomin Deng](/assets/img/avatar_default.png)
Remove the repeated word "registers" in comments. Signed-off-by: Shaomin Deng <dengshaomin@cdjrlc.com> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20220811152043.11446-1-dengshaomin@cdjrlc.com
360 lines
9.5 KiB
C
360 lines
9.5 KiB
C
/*
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* Broadcom specific AMBA
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* Broadcom MIPS32 74K core driver
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*
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* Copyright 2009, Broadcom Corporation
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* Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
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* Copyright 2010, Bernhard Loos <bernhardloos@googlemail.com>
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* Copyright 2011, Hauke Mehrtens <hauke@hauke-m.de>
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include "bcma_private.h"
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#include <linux/bcma/bcma.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <linux/serial_reg.h>
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#include <linux/time.h>
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#ifdef CONFIG_BCM47XX
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#include <linux/bcm47xx_nvram.h>
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#endif
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enum bcma_boot_dev {
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BCMA_BOOT_DEV_UNK = 0,
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BCMA_BOOT_DEV_ROM,
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BCMA_BOOT_DEV_PARALLEL,
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BCMA_BOOT_DEV_SERIAL,
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BCMA_BOOT_DEV_NAND,
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};
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/* The 47162a0 hangs when reading MIPS DMP registers */
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static inline bool bcma_core_mips_bcm47162a0_quirk(struct bcma_device *dev)
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{
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return dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM47162 &&
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dev->bus->chipinfo.rev == 0 && dev->id.id == BCMA_CORE_MIPS_74K;
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}
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/* The 5357b0 hangs when reading USB20H DMP registers */
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static inline bool bcma_core_mips_bcm5357b0_quirk(struct bcma_device *dev)
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{
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return (dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM5357 ||
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dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM4749) &&
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dev->bus->chipinfo.pkg == 11 &&
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dev->id.id == BCMA_CORE_USB20_HOST;
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}
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static inline u32 mips_read32(struct bcma_drv_mips *mcore,
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u16 offset)
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{
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return bcma_read32(mcore->core, offset);
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}
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static u32 bcma_core_mips_irqflag(struct bcma_device *dev)
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{
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u32 flag;
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if (bcma_core_mips_bcm47162a0_quirk(dev))
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return dev->core_index;
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if (bcma_core_mips_bcm5357b0_quirk(dev))
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return dev->core_index;
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flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30);
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if (flag)
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return flag & 0x1F;
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else
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return 0x3f;
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}
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/* Get the MIPS IRQ assignment for a specified device.
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* If unassigned, 0 is returned.
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* If disabled, 5 is returned.
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* If not supported, 6 is returned.
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*/
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unsigned int bcma_core_mips_irq(struct bcma_device *dev)
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{
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struct bcma_device *mdev = dev->bus->drv_mips.core;
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u32 irqflag;
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unsigned int irq;
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irqflag = bcma_core_mips_irqflag(dev);
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if (irqflag == 0x3f)
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return 6;
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for (irq = 0; irq <= 4; irq++)
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if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) &
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(1 << irqflag))
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return irq;
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return 5;
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}
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static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq)
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{
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unsigned int oldirq = bcma_core_mips_irq(dev);
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struct bcma_bus *bus = dev->bus;
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struct bcma_device *mdev = bus->drv_mips.core;
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u32 irqflag;
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irqflag = bcma_core_mips_irqflag(dev);
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BUG_ON(oldirq == 6);
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dev->irq = irq + 2;
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/* clear the old irq */
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if (oldirq == 0)
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bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
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bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) &
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~(1 << irqflag));
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else if (oldirq != 5)
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bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(oldirq), 0);
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/* assign the new one */
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if (irq == 0) {
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bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
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bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) |
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(1 << irqflag));
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} else {
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u32 irqinitmask = bcma_read32(mdev,
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BCMA_MIPS_MIPS74K_INTMASK(irq));
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if (irqinitmask) {
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struct bcma_device *core;
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/* backplane irq line is in use, find out who uses
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* it and set user to irq 0
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*/
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list_for_each_entry(core, &bus->cores, list) {
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if ((1 << bcma_core_mips_irqflag(core)) ==
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irqinitmask) {
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bcma_core_mips_set_irq(core, 0);
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break;
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}
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}
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}
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bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq),
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1 << irqflag);
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}
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bcma_debug(bus, "set_irq: core 0x%04x, irq %d => %d\n",
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dev->id.id, oldirq <= 4 ? oldirq + 2 : 0, irq + 2);
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}
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static void bcma_core_mips_set_irq_name(struct bcma_bus *bus, unsigned int irq,
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u16 coreid, u8 unit)
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{
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struct bcma_device *core;
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core = bcma_find_core_unit(bus, coreid, unit);
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if (!core) {
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bcma_warn(bus,
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"Can not find core (id: 0x%x, unit %i) for IRQ configuration.\n",
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coreid, unit);
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return;
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}
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bcma_core_mips_set_irq(core, irq);
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}
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static void bcma_core_mips_print_irq(struct bcma_device *dev, unsigned int irq)
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{
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int i;
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static const char *irq_name[] = {"2(S)", "3", "4", "5", "6", "D", "I"};
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char interrupts[25];
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char *ints = interrupts;
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for (i = 0; i < ARRAY_SIZE(irq_name); i++)
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ints += sprintf(ints, " %s%c",
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irq_name[i], i == irq ? '*' : ' ');
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bcma_debug(dev->bus, "core 0x%04x, irq:%s\n", dev->id.id, interrupts);
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}
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static void bcma_core_mips_dump_irq(struct bcma_bus *bus)
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{
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struct bcma_device *core;
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list_for_each_entry(core, &bus->cores, list) {
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bcma_core_mips_print_irq(core, bcma_core_mips_irq(core));
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}
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}
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u32 bcma_cpu_clock(struct bcma_drv_mips *mcore)
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{
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struct bcma_bus *bus = mcore->core->bus;
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if (bus->drv_cc.capabilities & BCMA_CC_CAP_PMU)
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return bcma_pmu_get_cpu_clock(&bus->drv_cc);
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bcma_err(bus, "No PMU available, need this to get the cpu clock\n");
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return 0;
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}
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EXPORT_SYMBOL(bcma_cpu_clock);
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static enum bcma_boot_dev bcma_boot_dev(struct bcma_bus *bus)
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{
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struct bcma_drv_cc *cc = &bus->drv_cc;
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u8 cc_rev = cc->core->id.rev;
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if (cc_rev == 42) {
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struct bcma_device *core;
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core = bcma_find_core(bus, BCMA_CORE_NS_ROM);
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if (core) {
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switch (bcma_aread32(core, BCMA_IOST) &
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BCMA_NS_ROM_IOST_BOOT_DEV_MASK) {
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case BCMA_NS_ROM_IOST_BOOT_DEV_NOR:
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return BCMA_BOOT_DEV_SERIAL;
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case BCMA_NS_ROM_IOST_BOOT_DEV_NAND:
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return BCMA_BOOT_DEV_NAND;
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case BCMA_NS_ROM_IOST_BOOT_DEV_ROM:
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default:
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return BCMA_BOOT_DEV_ROM;
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}
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}
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} else {
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if (cc_rev == 38) {
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if (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)
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return BCMA_BOOT_DEV_NAND;
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else if (cc->status & BIT(5))
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return BCMA_BOOT_DEV_ROM;
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}
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if ((cc->capabilities & BCMA_CC_CAP_FLASHT) ==
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BCMA_CC_FLASHT_PARA)
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return BCMA_BOOT_DEV_PARALLEL;
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else
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return BCMA_BOOT_DEV_SERIAL;
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}
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return BCMA_BOOT_DEV_SERIAL;
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}
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static void bcma_core_mips_nvram_init(struct bcma_drv_mips *mcore)
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{
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struct bcma_bus *bus = mcore->core->bus;
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enum bcma_boot_dev boot_dev;
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/* Determine flash type this SoC boots from */
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boot_dev = bcma_boot_dev(bus);
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switch (boot_dev) {
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case BCMA_BOOT_DEV_PARALLEL:
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case BCMA_BOOT_DEV_SERIAL:
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#ifdef CONFIG_BCM47XX
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bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH2,
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BCMA_SOC_FLASH2_SZ);
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#endif
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break;
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case BCMA_BOOT_DEV_NAND:
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#ifdef CONFIG_BCM47XX
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bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH1,
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BCMA_SOC_FLASH1_SZ);
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#endif
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break;
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default:
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break;
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}
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}
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void bcma_core_mips_early_init(struct bcma_drv_mips *mcore)
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{
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struct bcma_bus *bus = mcore->core->bus;
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if (mcore->early_setup_done)
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return;
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bcma_chipco_serial_init(&bus->drv_cc);
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bcma_core_mips_nvram_init(mcore);
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mcore->early_setup_done = true;
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}
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static void bcma_fix_i2s_irqflag(struct bcma_bus *bus)
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{
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struct bcma_device *cpu, *pcie, *i2s;
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/* Fixup the interrupts in 4716/4748 for i2s core (2010 Broadcom SDK)
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* (IRQ flags > 7 are ignored when setting the interrupt masks)
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*/
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if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4716 &&
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bus->chipinfo.id != BCMA_CHIP_ID_BCM4748)
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return;
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cpu = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
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pcie = bcma_find_core(bus, BCMA_CORE_PCIE);
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i2s = bcma_find_core(bus, BCMA_CORE_I2S);
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if (cpu && pcie && i2s &&
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bcma_aread32(cpu, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
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bcma_aread32(pcie, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
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bcma_aread32(i2s, BCMA_MIPS_OOBSELOUTA30) == 0x88) {
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bcma_awrite32(cpu, BCMA_MIPS_OOBSELINA74, 0x07060504);
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bcma_awrite32(pcie, BCMA_MIPS_OOBSELINA74, 0x07060504);
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bcma_awrite32(i2s, BCMA_MIPS_OOBSELOUTA30, 0x87);
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bcma_debug(bus,
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"Moved i2s interrupt to oob line 7 instead of 8\n");
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}
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}
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void bcma_core_mips_init(struct bcma_drv_mips *mcore)
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{
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struct bcma_bus *bus;
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struct bcma_device *core;
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bus = mcore->core->bus;
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if (mcore->setup_done)
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return;
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bcma_debug(bus, "Initializing MIPS core...\n");
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bcma_core_mips_early_init(mcore);
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bcma_fix_i2s_irqflag(bus);
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switch (bus->chipinfo.id) {
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case BCMA_CHIP_ID_BCM4716:
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case BCMA_CHIP_ID_BCM4748:
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bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
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bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
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bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
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bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_PCIE, 0);
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bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
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bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
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break;
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case BCMA_CHIP_ID_BCM5356:
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case BCMA_CHIP_ID_BCM47162:
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case BCMA_CHIP_ID_BCM53572:
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bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
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bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
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bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
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break;
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case BCMA_CHIP_ID_BCM5357:
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case BCMA_CHIP_ID_BCM4749:
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bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
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bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
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bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
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bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
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bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
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break;
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case BCMA_CHIP_ID_BCM4706:
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bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_PCIE, 0);
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bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_4706_MAC_GBIT,
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0);
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bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_PCIE, 1);
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bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_USB20_HOST, 0);
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bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_4706_CHIPCOMMON,
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0);
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break;
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default:
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list_for_each_entry(core, &bus->cores, list) {
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core->irq = bcma_core_irq(core, 0);
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}
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bcma_err(bus,
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"Unknown device (0x%x) found, can not configure IRQs\n",
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bus->chipinfo.id);
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}
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bcma_debug(bus, "IRQ reconfiguration done\n");
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bcma_core_mips_dump_irq(bus);
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mcore->setup_done = true;
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}
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