brcm47xx: add initial support for devices with bcma bus.

Ethernet and wifi are not working and this is highly experimental.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27301 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 402 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-3.0/0005-bcma-add-mips-driver.patch b/target/linux/brcm47xx/patches-3.0/0005-bcma-add-mips-driver.patch
new file mode 100644
index 0000000000..62cd10290e
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.0/0005-bcma-add-mips-driver.patch
@@ -0,0 +1,402 @@
+From 0a1a5fd8aab864e7b531ab88fd317ff7278d884d Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Mon, 6 Jun 2011 00:07:32 +0200
+Subject: [PATCH 05/14] bcma: add mips driver
+
+This adds a mips driver to bcma. This is only found on embedded
+devices. For now the driver just initializes the irqs used on this
+system.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ drivers/bcma/Kconfig                  |   11 ++-
+ drivers/bcma/Makefile                 |    1 +
+ drivers/bcma/driver_mips.c            |  234 +++++++++++++++++++++++++++++++++
+ drivers/bcma/main.c                   |   19 +++
+ include/linux/bcma/bcma.h             |    2 +
+ include/linux/bcma/bcma_driver_mips.h |   49 +++++++
+ 6 files changed, 315 insertions(+), 1 deletions(-)
+ create mode 100644 drivers/bcma/driver_mips.c
+ create mode 100644 include/linux/bcma/bcma_driver_mips.h
+
+--- a/drivers/bcma/Kconfig
++++ b/drivers/bcma/Kconfig
+@@ -29,9 +29,18 @@ config BCMA_HOST_PCI
+ 
+ config BCMA_HOST_SOC
+ 	bool
+-	depends on BCMA && MIPS
++	depends on BCMA_DRIVER_MIPS
+ 	default n
+ 
++config BCMA_DRIVER_MIPS
++	bool "BCMA Broadcom MIPS core driver"
++	depends on BCMA && MIPS
++	help
++	  Driver for the Broadcom MIPS core attached to Broadcom specific
++	  Advanced Microcontroller Bus.
++
++	  If unsure, say N
++
+ config BCMA_DEBUG
+ 	bool "BCMA debugging"
+ 	depends on BCMA
+--- a/drivers/bcma/Makefile
++++ b/drivers/bcma/Makefile
+@@ -1,6 +1,7 @@
+ bcma-y					+= main.o scan.o core.o sprom.o
+ bcma-y					+= driver_chipcommon.o driver_chipcommon_pmu.o
+ bcma-y					+= driver_pci.o
++bcma-$(CONFIG_BCMA_DRIVER_MIPS)		+= driver_mips.o
+ bcma-$(CONFIG_BCMA_HOST_PCI)		+= host_pci.o
+ bcma-$(CONFIG_BCMA_HOST_SOC)		+= host_soc.o
+ obj-$(CONFIG_BCMA)			+= bcma.o
+--- /dev/null
++++ b/drivers/bcma/driver_mips.c
+@@ -0,0 +1,234 @@
++/*
++ * Broadcom specific AMBA
++ * Broadcom MIPS32 74K core driver
++ *
++ * Copyright 2009, Broadcom Corporation
++ * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
++ * Copyright 2010, Bernhard Loos <bernhardloos@googlemail.com>
++ * Copyright 2011, Hauke Mehrtens <hauke@hauke-m.de>
++ *
++ * Licensed under the GNU/GPL. See COPYING for details.
++ */
++
++#include "bcma_private.h"
++
++#include <linux/bcma/bcma.h>
++
++#include <linux/serial.h>
++#include <linux/serial_core.h>
++#include <linux/serial_reg.h>
++#include <linux/time.h>
++
++/* The 47162a0 hangs when reading its registers */
++static inline bool bcma_core_mips_bcm47162a0_quirk(struct bcma_device *dev)
++{
++	return dev->bus->chipinfo.id == 47162 && dev->bus->chipinfo.rev == 0 &&
++	       dev->id.id == BCMA_CORE_MIPS_74K;
++}
++
++static inline u32 mips_read32(struct bcma_drv_mips *mcore,
++			      u16 offset)
++{
++	return bcma_read32(mcore->core, offset);
++}
++
++static inline void mips_write32(struct bcma_drv_mips *mcore,
++				u16 offset,
++				u32 value)
++{
++	bcma_write32(mcore->core, offset, value);
++}
++
++static const u32 ipsflag_irq_mask[] = {
++	0,
++	BCMA_MIPS_IPSFLAG_IRQ1,
++	BCMA_MIPS_IPSFLAG_IRQ2,
++	BCMA_MIPS_IPSFLAG_IRQ3,
++	BCMA_MIPS_IPSFLAG_IRQ4,
++};
++
++static const u32 ipsflag_irq_shift[] = {
++	0,
++	BCMA_MIPS_IPSFLAG_IRQ1_SHIFT,
++	BCMA_MIPS_IPSFLAG_IRQ2_SHIFT,
++	BCMA_MIPS_IPSFLAG_IRQ3_SHIFT,
++	BCMA_MIPS_IPSFLAG_IRQ4_SHIFT,
++};
++
++static u32 bcma_core_mips_irqflag(struct bcma_device *dev)
++{
++	u32 flag;
++
++	if (bcma_core_mips_bcm47162a0_quirk(dev))
++		return dev->core_index;
++	flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30);
++
++	return flag & 0x1F;
++}
++
++
++/* Get the MIPS IRQ assignment for a specified device.
++ * If unassigned, 0 is returned.
++ * If disabled, 5 is returned.
++ */
++unsigned int bcma_core_mips_irq(struct bcma_device *dev)
++{
++	struct bcma_device *mdev = dev->bus->drv_mips.core;
++	u32 irqflag;
++	unsigned int irq;
++
++	irqflag = bcma_core_mips_irqflag(dev);
++
++	for (irq = 1; irq <= 4; irq++)
++		if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) &
++		    (1 << irqflag))
++			return irq;
++
++	return 0;
++}
++EXPORT_SYMBOL(bcma_core_mips_irq);
++
++static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq)
++{
++	unsigned int oldirq = bcma_core_mips_irq(dev);
++	struct bcma_bus *bus = dev->bus;
++	struct bcma_device *mdev = bus->drv_mips.core;
++	u32 irqflag;
++
++	irqflag = bcma_core_mips_irqflag(dev);
++	BUG_ON(oldirq == 6);
++
++	dev->irq = irq + 2;
++
++	/* clear the old irq */
++	if (oldirq == 0)
++		bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
++			    bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) &
++			    ~(1 << irqflag));
++	else
++		bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq), 0);
++
++	/* assign the new one */
++	if (irq == 0) {
++		bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
++			    bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) |
++			    (1 << irqflag));
++	} else {
++		u32 oldirqflag = bcma_read32(mdev,
++					     BCMA_MIPS_MIPS74K_INTMASK(irq));
++		if (oldirqflag) {
++			struct bcma_device *core;
++
++			/* backplane irq line is in use, find out who uses
++			 * it and set user to irq 0
++			 */
++			list_for_each_entry_reverse(core, &bus->cores, list) {
++				if ((1 << bcma_core_mips_irqflag(core)) ==
++				    oldirqflag) {
++					bcma_core_mips_set_irq(core, 0);
++					break;
++				}
++			}
++		}
++		bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq),
++			     1 << irqflag);
++	}
++
++	pr_info("set_irq: core 0x%04x, irq %d => %d\n",
++		dev->id.id, oldirq + 2, irq + 2);
++}
++
++static void bcma_core_mips_print_irq(struct bcma_device *dev, unsigned int irq)
++{
++	int i;
++	static const char *irq_name[] = {"2(S)", "3", "4", "5", "6", "D", "I"};
++	printk(KERN_INFO KBUILD_MODNAME ": core 0x%04x, irq :", dev->id.id);
++	for (i = 0; i <= 6; i++)
++		printk(" %s%s", irq_name[i], i == irq ? "*" : " ");
++	printk("\n");
++}
++
++static void bcma_core_mips_dump_irq(struct bcma_bus *bus)
++{
++	struct bcma_device *core;
++
++	list_for_each_entry_reverse(core, &bus->cores, list) {
++		bcma_core_mips_print_irq(core, bcma_core_mips_irq(core));
++	}
++}
++
++static void bcma_core_mips_flash_detect(struct bcma_drv_mips *mcore)
++{
++	struct bcma_bus *bus = mcore->core->bus;
++
++	mcore->flash_buswidth = 2;
++	if (bus->drv_cc.core) {
++		mcore->flash_window = 0x1c000000;
++		mcore->flash_window_size = 0x02000000;
++		switch (bus->drv_cc.capabilities & BCMA_CC_CAP_FLASHT) {
++		case BCMA_CC_FLASHT_STSER:
++		case BCMA_CC_FLASHT_ATSER:
++			pr_err("Serial flash not supported.\n");
++			break;
++		case BCMA_CC_FLASHT_PARA:
++			if ((bcma_read32(bus->drv_cc.core, BCMA_CC_FLASH_CFG) &
++			     BCMA_CC_OTPS) == 0)
++				mcore->flash_buswidth = 1;
++			break;
++		}
++	} else {
++		mcore->flash_window = 0x1fc00000;
++		mcore->flash_window_size = 0x00400000;
++	}
++}
++
++void bcma_core_mips_init(struct bcma_drv_mips *mcore)
++{
++	struct bcma_bus *bus;
++	struct bcma_device *core;
++	bus = mcore->core->bus;
++
++	pr_info("Initializing MIPS core...\n");
++
++	if (!mcore->setup_done)
++		mcore->assigned_irqs = 1;
++
++	/* Assign IRQs to all cores on the bus */
++	list_for_each_entry_reverse(core, &bus->cores, list) {
++		int mips_irq;
++		if (core->irq)
++			continue;
++
++		mips_irq = bcma_core_mips_irq(core);
++		if (mips_irq > 4)
++			core->irq = 0;
++		else
++			core->irq = mips_irq + 2;
++		if (core->irq > 5)
++			continue;
++		switch (core->id.id) {
++		case BCMA_CORE_PCI:
++		case BCMA_CORE_PCIE:
++		case BCMA_CORE_ETHERNET:
++		case BCMA_CORE_ETHERNET_GBIT:
++		case BCMA_CORE_MAC_GBIT:
++		case BCMA_CORE_80211:
++		case BCMA_CORE_USB20_HOST:
++			/* These devices get their own IRQ line if available,
++			 * the rest goes on IRQ0
++			 */
++			if (mcore->assigned_irqs <= 4)
++				bcma_core_mips_set_irq(core,
++						       mcore->assigned_irqs++);
++			break;
++		}
++	}
++	pr_info("IRQ reconfiguration done\n");
++	bcma_core_mips_dump_irq(bus);
++
++	if (mcore->setup_done)
++		return;
++
++	bcma_core_mips_flash_detect(mcore);
++	mcore->setup_done = true;
++}
+--- a/drivers/bcma/main.c
++++ b/drivers/bcma/main.c
+@@ -80,6 +80,7 @@ static int bcma_register_cores(struct bc
+ 		case BCMA_CORE_CHIPCOMMON:
+ 		case BCMA_CORE_PCI:
+ 		case BCMA_CORE_PCIE:
++		case BCMA_CORE_MIPS_74K:
+ 			continue;
+ 		}
+ 
+@@ -141,6 +142,15 @@ int bcma_bus_register(struct bcma_bus *b
+ 		bcma_core_chipcommon_init(&bus->drv_cc);
+ 	}
+ 
++#ifdef CONFIG_BCMA_DRIVER_MIPS
++	/* Init MIPS core */
++	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
++	if (core) {
++		bus->drv_mips.core = core;
++		bcma_core_mips_init(&bus->drv_mips);
++	}
++#endif
++
+ 	/* Init PCIE core */
+ 	core = bcma_find_core(bus, BCMA_CORE_PCIE);
+ 	if (core) {
+@@ -208,6 +218,15 @@ int __init bcma_bus_early_register(struc
+ 		bcma_core_chipcommon_init(&bus->drv_cc);
+ 	}
+ 
++#ifdef CONFIG_BCMA_DRIVER_MIPS
++	/* Init MIPS core */
++	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
++	if (core) {
++		bus->drv_mips.core = core;
++		bcma_core_mips_init(&bus->drv_mips);
++	}
++#endif
++
+ 	pr_info("Early bus registered\n");
+ 
+ 	return 0;
+--- a/include/linux/bcma/bcma.h
++++ b/include/linux/bcma/bcma.h
+@@ -6,6 +6,7 @@
+ 
+ #include <linux/bcma/bcma_driver_chipcommon.h>
+ #include <linux/bcma/bcma_driver_pci.h>
++#include <linux/bcma/bcma_driver_mips.h>
+ #include <linux/ssb/ssb.h> /* SPROM sharing */
+ 
+ #include "bcma_regs.h"
+@@ -193,6 +194,7 @@ struct bcma_bus {
+ 
+ 	struct bcma_drv_cc drv_cc;
+ 	struct bcma_drv_pci drv_pci;
++	struct bcma_drv_mips drv_mips;
+ 
+ 	/* We decided to share SPROM struct with SSB as long as we do not need
+ 	 * any hacks for BCMA. This simplifies drivers code. */
+--- /dev/null
++++ b/include/linux/bcma/bcma_driver_mips.h
+@@ -0,0 +1,49 @@
++#ifndef LINUX_BCMA_DRIVER_MIPS_H_
++#define LINUX_BCMA_DRIVER_MIPS_H_
++
++#define BCMA_MIPS_IPSFLAG		0x0F08
++/* which sbflags get routed to mips interrupt 1 */
++#define	 BCMA_MIPS_IPSFLAG_IRQ1		0x0000003F
++#define	 BCMA_MIPS_IPSFLAG_IRQ1_SHIFT	0
++/* which sbflags get routed to mips interrupt 2 */
++#define	 BCMA_MIPS_IPSFLAG_IRQ2		0x00003F00
++#define	 BCMA_MIPS_IPSFLAG_IRQ2_SHIFT	8
++/* which sbflags get routed to mips interrupt 3 */
++#define	 BCMA_MIPS_IPSFLAG_IRQ3		0x003F0000
++#define	 BCMA_MIPS_IPSFLAG_IRQ3_SHIFT	16
++/* which sbflags get routed to mips interrupt 4 */
++#define	 BCMA_MIPS_IPSFLAG_IRQ4		0x3F000000
++#define	 BCMA_MIPS_IPSFLAG_IRQ4_SHIFT	24
++
++/* MIPS 74K core registers */
++#define BCMA_MIPS_MIPS74K_CORECTL	0x0000
++#define BCMA_MIPS_MIPS74K_EXCEPTBASE	0x0004
++#define BCMA_MIPS_MIPS74K_BIST		0x000C
++#define BCMA_MIPS_MIPS74K_INTMASK_INT0	0x0014
++#define BCMA_MIPS_MIPS74K_INTMASK(int) \
++	((int) * 4 + BCMA_MIPS_MIPS74K_INTMASK_INT0)
++#define BCMA_MIPS_MIPS74K_NMIMASK	0x002C
++#define BCMA_MIPS_MIPS74K_GPIOSEL	0x0040
++#define BCMA_MIPS_MIPS74K_GPIOOUT	0x0044
++#define BCMA_MIPS_MIPS74K_GPIOEN	0x0048
++#define BCMA_MIPS_MIPS74K_CLKCTLST	0x01E0
++
++#define BCMA_MIPS_OOBSELOUTA30		0x100
++
++struct bcma_device;
++
++struct bcma_drv_mips {
++	struct bcma_device *core;
++	u8 setup_done:1;
++	unsigned int assigned_irqs;
++
++	u8 flash_buswidth;
++	u32 flash_window;
++	u32 flash_window_size;
++};
++
++extern void bcma_core_mips_init(struct bcma_drv_mips *mcore);
++
++extern unsigned int bcma_core_mips_irq(struct bcma_device *dev);
++
++#endif /* LINUX_BCMA_DRIVER_MIPS_H_ */