Return-path: Received: from server19320154104.serverpool.info ([193.201.54.104]:33053 "EHLO hauke-m.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756247Ab1FEWIV (ORCPT ); Sun, 5 Jun 2011 18:08:21 -0400 From: Hauke Mehrtens To: linux-wireless@vger.kernel.org, linux-mips@linux-mips.org Cc: zajec5@gmail.com, mb@bu3sch.de, george@znau.edu.ua, arend@broadcom.com, b43-dev@lists.infradead.org, bernhardloos@googlemail.com, Hauke Mehrtens Subject: [RFC][PATCH 04/10] bcma: add mips driver Date: Mon, 6 Jun 2011 00:07:32 +0200 Message-Id: <1307311658-15853-5-git-send-email-hauke@hauke-m.de> (sfid-20110606_000825_458036_F130B5FE) In-Reply-To: <1307311658-15853-1-git-send-email-hauke@hauke-m.de> References: <1307311658-15853-1-git-send-email-hauke@hauke-m.de> Sender: linux-wireless-owner@vger.kernel.org List-ID: 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 --- drivers/bcma/Kconfig | 11 ++- drivers/bcma/Makefile | 1 + drivers/bcma/bcma_private.h | 3 + drivers/bcma/driver_mips.c | 227 +++++++++++++++++++++++++++++++++ drivers/bcma/main.c | 8 + include/linux/bcma/bcma.h | 2 + include/linux/bcma/bcma_driver_mips.h | 40 ++++++ 7 files changed, 291 insertions(+), 1 deletions(-) create mode 100644 drivers/bcma/driver_mips.c create mode 100644 include/linux/bcma/bcma_driver_mips.h diff --git a/drivers/bcma/Kconfig b/drivers/bcma/Kconfig index 0390e32..568d30b 100644 --- a/drivers/bcma/Kconfig +++ b/drivers/bcma/Kconfig @@ -29,9 +29,18 @@ config BCMA_HOST_PCI config BCMA_HOST_EMBEDDED 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 diff --git a/drivers/bcma/Makefile b/drivers/bcma/Makefile index e509b1b..50ddab8 100644 --- a/drivers/bcma/Makefile +++ b/drivers/bcma/Makefile @@ -1,6 +1,7 @@ bcma-y += main.o scan.o core.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-$(CONFIG_BCMA_HOST_EMBEDDED) += host_embedded.o obj-$(CONFIG_BCMA) += bcma.o diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h index 2f72e9c..842ee17 100644 --- a/drivers/bcma/bcma_private.h +++ b/drivers/bcma/bcma_private.h @@ -19,6 +19,9 @@ extern void bcma_bus_unregister(struct bcma_bus *bus); /* scan.c */ int bcma_bus_scan(struct bcma_bus *bus); +/* driver_mips.c */ +extern unsigned int bcma_core_mips_irq(struct bcma_device *dev); + #ifdef CONFIG_BCMA_HOST_PCI /* host_pci.c */ extern int __init bcma_host_pci_init(void); diff --git a/drivers/bcma/driver_mips.c b/drivers/bcma/driver_mips.c new file mode 100644 index 0000000..0a6c217 --- /dev/null +++ b/drivers/bcma/driver_mips.c @@ -0,0 +1,227 @@ +/* + * Sonics Silicon Backplane + * Broadcom MIPS core driver + * + * Copyright 2005, Broadcom Corporation + * Copyright 2006, 2007, Michael Buesch + * Copyright 2010, Bernhard Loos + * + * Licensed under the GNU/GPL. See COPYING for details. + */ + +#include + +#include +#include +#include +#include + +#include "bcma_private.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. + * If not supported, 6 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)) + break; + + if (irq == 5) + irq = 0; + + return 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) { + int i; + /* backplane irq line is in use, find out who uses + * it and set user to irq 0 + */ + for (i = 0; i < bus->nr_cores; i++) + if ((1 << bcma_core_mips_irqflag(&bus->cores[i])) == oldirqflag) { + bcma_core_mips_set_irq(&bus->cores[i], 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) +{ + int i; + for (i = 0; i < bus->nr_cores; i++) { + struct bcma_device *dev; + dev = &(bus->cores[i]); + bcma_core_mips_print_irq(dev, bcma_core_mips_irq(dev)); + } +} + +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 *dev; + unsigned int irq, i; + + if (!mcore->core) + return; /* We don't have a MIPS core */ + + pr_info("Initializing MIPS core...\n"); + + bus = mcore->core->bus; + + /* Assign IRQs to all cores on the bus */ + for (irq = 1, i = 0; i < bus->nr_cores; i++) { + int mips_irq; + dev = &(bus->cores[i]); + mips_irq = bcma_core_mips_irq(dev); + if (mips_irq > 4) + dev->irq = 0; + else + dev->irq = mips_irq + 2; + if (dev->irq > 5) + continue; + switch (dev->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 (irq <= 4) + bcma_core_mips_set_irq(dev, irq++); + break; + } + } + pr_info("after irq reconfiguration\n"); + bcma_core_mips_dump_irq(bus); + + bcma_core_mips_flash_detect(mcore); +} diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c index c5bcb5f..0b4e26d 100644 --- a/drivers/bcma/main.c +++ b/drivers/bcma/main.c @@ -96,6 +96,7 @@ static int bcma_register_cores(struct bcma_bus *bus) case BCMA_CORE_CHIPCOMMON: case BCMA_CORE_PCI: case BCMA_CORE_PCIE: + case BCMA_CORE_MIPS_74K: continue; } @@ -198,6 +199,13 @@ int bcma_bus_register(struct bcma_bus *bus) bcma_core_chipcommon_init(&bus->drv_cc); } + /* 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); + } + /* Find PCIE core */ core = bcma_find_core(bus, BCMA_CORE_PCIE); if (core) { diff --git a/include/linux/bcma/bcma.h b/include/linux/bcma/bcma.h index 192c4ae..c5d7d4d 100644 --- a/include/linux/bcma/bcma.h +++ b/include/linux/bcma/bcma.h @@ -6,6 +6,7 @@ #include #include +#include #include "bcma_regs.h" @@ -198,6 +199,7 @@ struct bcma_bus { struct bcma_drv_cc drv_cc; struct bcma_drv_pci drv_pci; + struct bcma_drv_mips drv_mips; /* Internal-only stuff follows. Do not touch. */ struct list_head attach_list; diff --git a/include/linux/bcma/bcma_driver_mips.h b/include/linux/bcma/bcma_driver_mips.h new file mode 100644 index 0000000..5faf30c --- /dev/null +++ b/include/linux/bcma/bcma_driver_mips.h @@ -0,0 +1,40 @@ +#ifndef LINUX_BCMA_DRIVER_MIPS_H_ +#define LINUX_BCMA_DRIVER_MIPS_H_ + +#define BCMA_MIPS_IPSFLAG 0x0F08 +#define BCMA_MIPS_IPSFLAG_IRQ1 0x0000003F /* which sbflags get routed to mips interrupt 1 */ +#define BCMA_MIPS_IPSFLAG_IRQ1_SHIFT 0 +#define BCMA_MIPS_IPSFLAG_IRQ2 0x00003F00 /* which sbflags get routed to mips interrupt 2 */ +#define BCMA_MIPS_IPSFLAG_IRQ2_SHIFT 8 +#define BCMA_MIPS_IPSFLAG_IRQ3 0x003F0000 /* which sbflags get routed to mips interrupt 3 */ +#define BCMA_MIPS_IPSFLAG_IRQ3_SHIFT 16 +#define BCMA_MIPS_IPSFLAG_IRQ4 0x3F000000 /* which sbflags get routed to mips interrupt 4 */ +#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 flash_buswidth; + u32 flash_window; + u32 flash_window_size; +}; + +extern void bcma_core_mips_init(struct bcma_drv_mips *mcore); + +#endif /* LINUX_BCMA_DRIVER_MIPS_H_ */ -- 1.7.4.1