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Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/sysdev/fsl_lbc.c')
-rw-r--r--ANDROID_3.4.5/arch/powerpc/sysdev/fsl_lbc.c391
1 files changed, 0 insertions, 391 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/sysdev/fsl_lbc.c b/ANDROID_3.4.5/arch/powerpc/sysdev/fsl_lbc.c
deleted file mode 100644
index 483126d7..00000000
--- a/ANDROID_3.4.5/arch/powerpc/sysdev/fsl_lbc.c
+++ /dev/null
@@ -1,391 +0,0 @@
-/*
- * Freescale LBC and UPM routines.
- *
- * Copyright © 2007-2008 MontaVista Software, Inc.
- * Copyright © 2010 Freescale Semiconductor
- *
- * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
- * Author: Jack Lan <Jack.Lan@freescale.com>
- * Author: Roy Zang <tie-fei.zang@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.
- */
-
-#include <linux/init.h>
-#include <linux/export.h>
-#include <linux/kernel.h>
-#include <linux/compiler.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/mod_devicetable.h>
-#include <asm/prom.h>
-#include <asm/fsl_lbc.h>
-
-static spinlock_t fsl_lbc_lock = __SPIN_LOCK_UNLOCKED(fsl_lbc_lock);
-struct fsl_lbc_ctrl *fsl_lbc_ctrl_dev;
-EXPORT_SYMBOL(fsl_lbc_ctrl_dev);
-
-/**
- * fsl_lbc_addr - convert the base address
- * @addr_base: base address of the memory bank
- *
- * This function converts a base address of lbc into the right format for the
- * BR register. If the SOC has eLBC then it returns 32bit physical address
- * else it convers a 34bit local bus physical address to correct format of
- * 32bit address for BR register (Example: MPC8641).
- */
-u32 fsl_lbc_addr(phys_addr_t addr_base)
-{
- struct device_node *np = fsl_lbc_ctrl_dev->dev->of_node;
- u32 addr = addr_base & 0xffff8000;
-
- if (of_device_is_compatible(np, "fsl,elbc"))
- return addr;
-
- return addr | ((addr_base & 0x300000000ull) >> 19);
-}
-EXPORT_SYMBOL(fsl_lbc_addr);
-
-/**
- * fsl_lbc_find - find Localbus bank
- * @addr_base: base address of the memory bank
- *
- * This function walks LBC banks comparing "Base address" field of the BR
- * 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_lbc_find(phys_addr_t addr_base)
-{
- int i;
- struct fsl_lbc_regs __iomem *lbc;
-
- if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
- return -ENODEV;
-
- lbc = fsl_lbc_ctrl_dev->regs;
- for (i = 0; i < ARRAY_SIZE(lbc->bank); i++) {
- __be32 br = in_be32(&lbc->bank[i].br);
- __be32 or = in_be32(&lbc->bank[i].or);
-
- if (br & BR_V && (br & or & BR_BA) == fsl_lbc_addr(addr_base))
- return i;
- }
-
- return -ENOENT;
-}
-EXPORT_SYMBOL(fsl_lbc_find);
-
-/**
- * fsl_upm_find - find pre-programmed UPM via base address
- * @addr_base: base address of the memory bank controlled by the UPM
- * @upm: pointer to the allocated fsl_upm structure
- *
- * This function fills fsl_upm structure so you can use it with the rest of
- * UPM API. On success this function returns 0, otherwise it returns
- * appropriate errno value.
- */
-int fsl_upm_find(phys_addr_t addr_base, struct fsl_upm *upm)
-{
- int bank;
- __be32 br;
- struct fsl_lbc_regs __iomem *lbc;
-
- bank = fsl_lbc_find(addr_base);
- if (bank < 0)
- return bank;
-
- if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
- return -ENODEV;
-
- lbc = fsl_lbc_ctrl_dev->regs;
- br = in_be32(&lbc->bank[bank].br);
-
- switch (br & BR_MSEL) {
- case BR_MS_UPMA:
- upm->mxmr = &lbc->mamr;
- break;
- case BR_MS_UPMB:
- upm->mxmr = &lbc->mbmr;
- break;
- case BR_MS_UPMC:
- upm->mxmr = &lbc->mcmr;
- break;
- default:
- return -EINVAL;
- }
-
- switch (br & BR_PS) {
- case BR_PS_8:
- upm->width = 8;
- break;
- case BR_PS_16:
- upm->width = 16;
- break;
- case BR_PS_32:
- upm->width = 32;
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(fsl_upm_find);
-
-/**
- * fsl_upm_run_pattern - actually run an UPM pattern
- * @upm: pointer to the fsl_upm structure obtained via fsl_upm_find
- * @io_base: remapped pointer to where memory access should happen
- * @mar: MAR register content during pattern execution
- *
- * This function triggers dummy write to the memory specified by the io_base,
- * thus UPM pattern actually executed. Note that mar usage depends on the
- * pre-programmed AMX bits in the UPM RAM.
- */
-int fsl_upm_run_pattern(struct fsl_upm *upm, void __iomem *io_base, u32 mar)
-{
- int ret = 0;
- unsigned long flags;
-
- if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
- return -ENODEV;
-
- spin_lock_irqsave(&fsl_lbc_lock, flags);
-
- out_be32(&fsl_lbc_ctrl_dev->regs->mar, mar);
-
- switch (upm->width) {
- case 8:
- out_8(io_base, 0x0);
- break;
- case 16:
- out_be16(io_base, 0x0);
- break;
- case 32:
- out_be32(io_base, 0x0);
- break;
- default:
- ret = -EINVAL;
- break;
- }
-
- spin_unlock_irqrestore(&fsl_lbc_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(fsl_upm_run_pattern);
-
-static int __devinit fsl_lbc_ctrl_init(struct fsl_lbc_ctrl *ctrl,
- struct device_node *node)
-{
- struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
-
- /* clear event registers */
- setbits32(&lbc->ltesr, LTESR_CLEAR);
- out_be32(&lbc->lteatr, 0);
- out_be32(&lbc->ltear, 0);
- out_be32(&lbc->lteccr, LTECCR_CLEAR);
- out_be32(&lbc->ltedr, LTEDR_ENABLE);
-
- /* Set the monitor timeout value to the maximum for erratum A001 */
- if (of_device_is_compatible(node, "fsl,elbc"))
- clrsetbits_be32(&lbc->lbcr, LBCR_BMT, LBCR_BMTPS);
-
- return 0;
-}
-
-/*
- * NOTE: This interrupt is used to report localbus events of various kinds,
- * such as transaction errors on the chipselects.
- */
-
-static irqreturn_t fsl_lbc_ctrl_irq(int irqno, void *data)
-{
- struct fsl_lbc_ctrl *ctrl = data;
- struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
- u32 status;
-
- status = in_be32(&lbc->ltesr);
- if (!status)
- return IRQ_NONE;
-
- out_be32(&lbc->ltesr, LTESR_CLEAR);
- out_be32(&lbc->lteatr, 0);
- out_be32(&lbc->ltear, 0);
- ctrl->irq_status = status;
-
- if (status & LTESR_BM)
- dev_err(ctrl->dev, "Local bus monitor time-out: "
- "LTESR 0x%08X\n", status);
- if (status & LTESR_WP)
- dev_err(ctrl->dev, "Write protect error: "
- "LTESR 0x%08X\n", status);
- if (status & LTESR_ATMW)
- dev_err(ctrl->dev, "Atomic write error: "
- "LTESR 0x%08X\n", status);
- if (status & LTESR_ATMR)
- dev_err(ctrl->dev, "Atomic read error: "
- "LTESR 0x%08X\n", status);
- if (status & LTESR_CS)
- dev_err(ctrl->dev, "Chip select error: "
- "LTESR 0x%08X\n", status);
- if (status & LTESR_UPM)
- ;
- if (status & LTESR_FCT) {
- dev_err(ctrl->dev, "FCM command time-out: "
- "LTESR 0x%08X\n", status);
- smp_wmb();
- wake_up(&ctrl->irq_wait);
- }
- if (status & LTESR_PAR) {
- dev_err(ctrl->dev, "Parity or Uncorrectable ECC error: "
- "LTESR 0x%08X\n", status);
- smp_wmb();
- wake_up(&ctrl->irq_wait);
- }
- if (status & LTESR_CC) {
- smp_wmb();
- wake_up(&ctrl->irq_wait);
- }
- if (status & ~LTESR_MASK)
- dev_err(ctrl->dev, "Unknown error: "
- "LTESR 0x%08X\n", status);
- return IRQ_HANDLED;
-}
-
-/*
- * fsl_lbc_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 __devinit fsl_lbc_ctrl_probe(struct platform_device *dev)
-{
- int ret;
-
- if (!dev->dev.of_node) {
- dev_err(&dev->dev, "Device OF-Node is NULL");
- return -EFAULT;
- }
-
- fsl_lbc_ctrl_dev = kzalloc(sizeof(*fsl_lbc_ctrl_dev), GFP_KERNEL);
- if (!fsl_lbc_ctrl_dev)
- return -ENOMEM;
-
- dev_set_drvdata(&dev->dev, fsl_lbc_ctrl_dev);
-
- spin_lock_init(&fsl_lbc_ctrl_dev->lock);
- init_waitqueue_head(&fsl_lbc_ctrl_dev->irq_wait);
-
- fsl_lbc_ctrl_dev->regs = of_iomap(dev->dev.of_node, 0);
- if (!fsl_lbc_ctrl_dev->regs) {
- dev_err(&dev->dev, "failed to get memory region\n");
- ret = -ENODEV;
- goto err;
- }
-
- fsl_lbc_ctrl_dev->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
- if (fsl_lbc_ctrl_dev->irq == NO_IRQ) {
- dev_err(&dev->dev, "failed to get irq resource\n");
- ret = -ENODEV;
- goto err;
- }
-
- fsl_lbc_ctrl_dev->dev = &dev->dev;
-
- ret = fsl_lbc_ctrl_init(fsl_lbc_ctrl_dev, dev->dev.of_node);
- if (ret < 0)
- goto err;
-
- ret = request_irq(fsl_lbc_ctrl_dev->irq, fsl_lbc_ctrl_irq, 0,
- "fsl-lbc", fsl_lbc_ctrl_dev);
- if (ret != 0) {
- dev_err(&dev->dev, "failed to install irq (%d)\n",
- fsl_lbc_ctrl_dev->irq);
- ret = fsl_lbc_ctrl_dev->irq;
- goto err;
- }
-
- /* Enable interrupts for any detected events */
- out_be32(&fsl_lbc_ctrl_dev->regs->lteir, LTEIR_ENABLE);
-
- return 0;
-
-err:
- iounmap(fsl_lbc_ctrl_dev->regs);
- kfree(fsl_lbc_ctrl_dev);
- fsl_lbc_ctrl_dev = NULL;
- return ret;
-}
-
-#ifdef CONFIG_SUSPEND
-
-/* save lbc registers */
-static int fsl_lbc_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct fsl_lbc_ctrl *ctrl = dev_get_drvdata(&pdev->dev);
- struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
-
- ctrl->saved_regs = kmalloc(sizeof(struct fsl_lbc_regs), GFP_KERNEL);
- if (!ctrl->saved_regs)
- return -ENOMEM;
-
- _memcpy_fromio(ctrl->saved_regs, lbc, sizeof(struct fsl_lbc_regs));
- return 0;
-}
-
-/* restore lbc registers */
-static int fsl_lbc_resume(struct platform_device *pdev)
-{
- struct fsl_lbc_ctrl *ctrl = dev_get_drvdata(&pdev->dev);
- struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
-
- if (ctrl->saved_regs) {
- _memcpy_toio(lbc, ctrl->saved_regs,
- sizeof(struct fsl_lbc_regs));
- kfree(ctrl->saved_regs);
- ctrl->saved_regs = NULL;
- }
- return 0;
-}
-#endif /* CONFIG_SUSPEND */
-
-static const struct of_device_id fsl_lbc_match[] = {
- { .compatible = "fsl,elbc", },
- { .compatible = "fsl,pq3-localbus", },
- { .compatible = "fsl,pq2-localbus", },
- { .compatible = "fsl,pq2pro-localbus", },
- {},
-};
-
-static struct platform_driver fsl_lbc_ctrl_driver = {
- .driver = {
- .name = "fsl-lbc",
- .of_match_table = fsl_lbc_match,
- },
- .probe = fsl_lbc_ctrl_probe,
-#ifdef CONFIG_SUSPEND
- .suspend = fsl_lbc_suspend,
- .resume = fsl_lbc_resume,
-#endif
-};
-
-static int __init fsl_lbc_init(void)
-{
- return platform_driver_register(&fsl_lbc_ctrl_driver);
-}
-module_init(fsl_lbc_init);
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