diff options
Diffstat (limited to 'arch/powerpc/sysdev/fsl_ifc.c')
| -rw-r--r-- | arch/powerpc/sysdev/fsl_ifc.c | 305 |
1 files changed, 0 insertions, 305 deletions
diff --git a/arch/powerpc/sysdev/fsl_ifc.c b/arch/powerpc/sysdev/fsl_ifc.c deleted file mode 100644 index fbc885b31946..000000000000 --- a/arch/powerpc/sysdev/fsl_ifc.c +++ /dev/null @@ -1,305 +0,0 @@ -/* - * Copyright 2011 Freescale Semiconductor, Inc - * - * Freescale Integrated Flash Controller - * - * Author: Dipen Dudhat <Dipen.Dudhat@freescale.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/compiler.h> -#include <linux/spinlock.h> -#include <linux/types.h> -#include <linux/slab.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/platform_device.h> -#include <asm/prom.h> -#include <asm/fsl_ifc.h> - -struct fsl_ifc_ctrl *fsl_ifc_ctrl_dev; -EXPORT_SYMBOL(fsl_ifc_ctrl_dev); - -/* - * convert_ifc_address - convert the base address - * @addr_base: base address of the memory bank - */ -unsigned int convert_ifc_address(phys_addr_t addr_base) -{ - return addr_base & CSPR_BA; -} -EXPORT_SYMBOL(convert_ifc_address); - -/* - * fsl_ifc_find - find IFC bank - * @addr_base: base address of the memory bank - * - * This function walks IFC banks comparing "Base address" field of the CSPR - * registers with the supplied addr_base argument. When bases match this - * function returns bank number (starting with 0), otherwise it returns - * appropriate errno value. - */ -int fsl_ifc_find(phys_addr_t addr_base) -{ - int i = 0; - - if (!fsl_ifc_ctrl_dev || !fsl_ifc_ctrl_dev->regs) - return -ENODEV; - - for (i = 0; i < ARRAY_SIZE(fsl_ifc_ctrl_dev->regs->cspr_cs); i++) { - u32 cspr = in_be32(&fsl_ifc_ctrl_dev->regs->cspr_cs[i].cspr); - if (cspr & CSPR_V && (cspr & CSPR_BA) == - convert_ifc_address(addr_base)) - return i; - } - - return -ENOENT; -} -EXPORT_SYMBOL(fsl_ifc_find); - -static int fsl_ifc_ctrl_init(struct fsl_ifc_ctrl *ctrl) -{ - struct fsl_ifc_regs __iomem *ifc = ctrl->regs; - - /* - * Clear all the common status and event registers - */ - if (in_be32(&ifc->cm_evter_stat) & IFC_CM_EVTER_STAT_CSER) - out_be32(&ifc->cm_evter_stat, IFC_CM_EVTER_STAT_CSER); - - /* enable all error and events */ - out_be32(&ifc->cm_evter_en, IFC_CM_EVTER_EN_CSEREN); - - /* enable all error and event interrupts */ - out_be32(&ifc->cm_evter_intr_en, IFC_CM_EVTER_INTR_EN_CSERIREN); - out_be32(&ifc->cm_erattr0, 0x0); - out_be32(&ifc->cm_erattr1, 0x0); - - return 0; -} - -static int fsl_ifc_ctrl_remove(struct platform_device *dev) -{ - struct fsl_ifc_ctrl *ctrl = dev_get_drvdata(&dev->dev); - - free_irq(ctrl->nand_irq, ctrl); - free_irq(ctrl->irq, ctrl); - - irq_dispose_mapping(ctrl->nand_irq); - irq_dispose_mapping(ctrl->irq); - - iounmap(ctrl->regs); - - dev_set_drvdata(&dev->dev, NULL); - kfree(ctrl); - - return 0; -} - -/* - * NAND events are split between an operational interrupt which only - * receives OPC, and an error interrupt that receives everything else, - * including non-NAND errors. Whichever interrupt gets to it first - * records the status and wakes the wait queue. - */ -static DEFINE_SPINLOCK(nand_irq_lock); - -static u32 check_nand_stat(struct fsl_ifc_ctrl *ctrl) -{ - struct fsl_ifc_regs __iomem *ifc = ctrl->regs; - unsigned long flags; - u32 stat; - - spin_lock_irqsave(&nand_irq_lock, flags); - - stat = in_be32(&ifc->ifc_nand.nand_evter_stat); - if (stat) { - out_be32(&ifc->ifc_nand.nand_evter_stat, stat); - ctrl->nand_stat = stat; - wake_up(&ctrl->nand_wait); - } - - spin_unlock_irqrestore(&nand_irq_lock, flags); - - return stat; -} - -static irqreturn_t fsl_ifc_nand_irq(int irqno, void *data) -{ - struct fsl_ifc_ctrl *ctrl = data; - - if (check_nand_stat(ctrl)) - return IRQ_HANDLED; - - return IRQ_NONE; -} - -/* - * NOTE: This interrupt is used to report ifc events of various kinds, - * such as transaction errors on the chipselects. - */ -static irqreturn_t fsl_ifc_ctrl_irq(int irqno, void *data) -{ - struct fsl_ifc_ctrl *ctrl = data; - struct fsl_ifc_regs __iomem *ifc = ctrl->regs; - u32 err_axiid, err_srcid, status, cs_err, err_addr; - irqreturn_t ret = IRQ_NONE; - - /* read for chip select error */ - cs_err = in_be32(&ifc->cm_evter_stat); - if (cs_err) { - dev_err(ctrl->dev, "transaction sent to IFC is not mapped to" - "any memory bank 0x%08X\n", cs_err); - /* clear the chip select error */ - out_be32(&ifc->cm_evter_stat, IFC_CM_EVTER_STAT_CSER); - - /* read error attribute registers print the error information */ - status = in_be32(&ifc->cm_erattr0); - err_addr = in_be32(&ifc->cm_erattr1); - - if (status & IFC_CM_ERATTR0_ERTYP_READ) - dev_err(ctrl->dev, "Read transaction error" - "CM_ERATTR0 0x%08X\n", status); - else - dev_err(ctrl->dev, "Write transaction error" - "CM_ERATTR0 0x%08X\n", status); - - err_axiid = (status & IFC_CM_ERATTR0_ERAID) >> - IFC_CM_ERATTR0_ERAID_SHIFT; - dev_err(ctrl->dev, "AXI ID of the error" - "transaction 0x%08X\n", err_axiid); - - err_srcid = (status & IFC_CM_ERATTR0_ESRCID) >> - IFC_CM_ERATTR0_ESRCID_SHIFT; - dev_err(ctrl->dev, "SRC ID of the error" - "transaction 0x%08X\n", err_srcid); - - dev_err(ctrl->dev, "Transaction Address corresponding to error" - "ERADDR 0x%08X\n", err_addr); - - ret = IRQ_HANDLED; - } - - if (check_nand_stat(ctrl)) - ret = IRQ_HANDLED; - - return ret; -} - -/* - * fsl_ifc_ctrl_probe - * - * called by device layer when it finds a device matching - * one our driver can handled. This code allocates all of - * the resources needed for the controller only. The - * resources for the NAND banks themselves are allocated - * in the chip probe function. -*/ -static int fsl_ifc_ctrl_probe(struct platform_device *dev) -{ - int ret = 0; - - - dev_info(&dev->dev, "Freescale Integrated Flash Controller\n"); - - fsl_ifc_ctrl_dev = kzalloc(sizeof(*fsl_ifc_ctrl_dev), GFP_KERNEL); - if (!fsl_ifc_ctrl_dev) - return -ENOMEM; - - dev_set_drvdata(&dev->dev, fsl_ifc_ctrl_dev); - - /* IOMAP the entire IFC region */ - fsl_ifc_ctrl_dev->regs = of_iomap(dev->dev.of_node, 0); - if (!fsl_ifc_ctrl_dev->regs) { - dev_err(&dev->dev, "failed to get memory region\n"); - ret = -ENODEV; - goto err; - } - - /* get the Controller level irq */ - fsl_ifc_ctrl_dev->irq = irq_of_parse_and_map(dev->dev.of_node, 0); - if (fsl_ifc_ctrl_dev->irq == NO_IRQ) { - dev_err(&dev->dev, "failed to get irq resource " - "for IFC\n"); - ret = -ENODEV; - goto err; - } - - /* get the nand machine irq */ - fsl_ifc_ctrl_dev->nand_irq = - irq_of_parse_and_map(dev->dev.of_node, 1); - - fsl_ifc_ctrl_dev->dev = &dev->dev; - - ret = fsl_ifc_ctrl_init(fsl_ifc_ctrl_dev); - if (ret < 0) - goto err; - - init_waitqueue_head(&fsl_ifc_ctrl_dev->nand_wait); - - ret = request_irq(fsl_ifc_ctrl_dev->irq, fsl_ifc_ctrl_irq, IRQF_SHARED, - "fsl-ifc", fsl_ifc_ctrl_dev); - if (ret != 0) { - dev_err(&dev->dev, "failed to install irq (%d)\n", - fsl_ifc_ctrl_dev->irq); - goto err_irq; - } - - if (fsl_ifc_ctrl_dev->nand_irq) { - ret = request_irq(fsl_ifc_ctrl_dev->nand_irq, fsl_ifc_nand_irq, - 0, "fsl-ifc-nand", fsl_ifc_ctrl_dev); - if (ret != 0) { - dev_err(&dev->dev, "failed to install irq (%d)\n", - fsl_ifc_ctrl_dev->nand_irq); - goto err_nandirq; - } - } - - return 0; - -err_nandirq: - free_irq(fsl_ifc_ctrl_dev->nand_irq, fsl_ifc_ctrl_dev); - irq_dispose_mapping(fsl_ifc_ctrl_dev->nand_irq); -err_irq: - free_irq(fsl_ifc_ctrl_dev->irq, fsl_ifc_ctrl_dev); - irq_dispose_mapping(fsl_ifc_ctrl_dev->irq); -err: - return ret; -} - -static const struct of_device_id fsl_ifc_match[] = { - { - .compatible = "fsl,ifc", - }, - {}, -}; - -static struct platform_driver fsl_ifc_ctrl_driver = { - .driver = { - .name = "fsl-ifc", - .of_match_table = fsl_ifc_match, - }, - .probe = fsl_ifc_ctrl_probe, - .remove = fsl_ifc_ctrl_remove, -}; - -module_platform_driver(fsl_ifc_ctrl_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Freescale Semiconductor"); -MODULE_DESCRIPTION("Freescale Integrated Flash Controller driver"); |