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https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-09 01:28:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
338
drivers/scsi/sgiwd93.c
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338
drivers/scsi/sgiwd93.c
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1996 David S. Miller (davem@davemloft.net)
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* Copyright (C) 1999 Andrew R. Baker (andrewb@uab.edu)
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* Copyright (C) 2001 Florian Lohoff (flo@rfc822.org)
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* Copyright (C) 2003, 07 Ralf Baechle (ralf@linux-mips.org)
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*
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* (In all truth, Jed Schimmel wrote all this code.)
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*/
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#undef DEBUG
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/gfp.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/spinlock.h>
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#include <asm/sgi/hpc3.h>
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#include <asm/sgi/ip22.h>
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#include <asm/sgi/wd.h>
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#include "scsi.h"
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#include "wd33c93.h"
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struct ip22_hostdata {
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struct WD33C93_hostdata wh;
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dma_addr_t dma;
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void *cpu;
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struct device *dev;
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};
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#define host_to_hostdata(host) ((struct ip22_hostdata *)((host)->hostdata))
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struct hpc_chunk {
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struct hpc_dma_desc desc;
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u32 _padding; /* align to quadword boundary */
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};
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/* space for hpc dma descriptors */
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#define HPC_DMA_SIZE PAGE_SIZE
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#define DMA_DIR(d) ((d == DATA_OUT_DIR) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
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static irqreturn_t sgiwd93_intr(int irq, void *dev_id)
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{
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struct Scsi_Host * host = dev_id;
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unsigned long flags;
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spin_lock_irqsave(host->host_lock, flags);
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wd33c93_intr(host);
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spin_unlock_irqrestore(host->host_lock, flags);
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return IRQ_HANDLED;
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}
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static inline
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void fill_hpc_entries(struct ip22_hostdata *hd, struct scsi_cmnd *cmd, int din)
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{
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unsigned long len = cmd->SCp.this_residual;
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void *addr = cmd->SCp.ptr;
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dma_addr_t physaddr;
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unsigned long count;
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struct hpc_chunk *hcp;
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physaddr = dma_map_single(hd->dev, addr, len, DMA_DIR(din));
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cmd->SCp.dma_handle = physaddr;
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hcp = hd->cpu;
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while (len) {
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/*
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* even cntinfo could be up to 16383, without
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* magic only 8192 works correctly
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*/
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count = len > 8192 ? 8192 : len;
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hcp->desc.pbuf = physaddr;
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hcp->desc.cntinfo = count;
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hcp++;
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len -= count;
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physaddr += count;
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}
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/*
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* To make sure, if we trip an HPC bug, that we transfer every single
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* byte, we tag on an extra zero length dma descriptor at the end of
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* the chain.
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*/
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hcp->desc.pbuf = 0;
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hcp->desc.cntinfo = HPCDMA_EOX;
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dma_cache_sync(hd->dev, hd->cpu,
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(unsigned long)(hcp + 1) - (unsigned long)hd->cpu,
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DMA_TO_DEVICE);
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}
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static int dma_setup(struct scsi_cmnd *cmd, int datainp)
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{
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struct ip22_hostdata *hdata = host_to_hostdata(cmd->device->host);
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struct hpc3_scsiregs *hregs =
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(struct hpc3_scsiregs *) cmd->device->host->base;
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pr_debug("dma_setup: datainp<%d> hcp<%p> ", datainp, hdata->cpu);
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hdata->wh.dma_dir = datainp;
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/*
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* wd33c93 shouldn't pass us bogus dma_setups, but it does:-( The
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* other wd33c93 drivers deal with it the same way (which isn't that
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* obvious). IMHO a better fix would be, not to do these dma setups
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* in the first place.
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*/
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if (cmd->SCp.ptr == NULL || cmd->SCp.this_residual == 0)
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return 1;
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fill_hpc_entries(hdata, cmd, datainp);
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pr_debug(" HPCGO\n");
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/* Start up the HPC. */
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hregs->ndptr = hdata->dma;
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if (datainp)
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hregs->ctrl = HPC3_SCTRL_ACTIVE;
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else
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hregs->ctrl = HPC3_SCTRL_ACTIVE | HPC3_SCTRL_DIR;
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return 0;
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}
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static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
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int status)
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{
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struct ip22_hostdata *hdata = host_to_hostdata(instance);
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struct hpc3_scsiregs *hregs;
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if (!SCpnt)
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return;
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if (SCpnt->SCp.ptr == NULL || SCpnt->SCp.this_residual == 0)
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return;
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hregs = (struct hpc3_scsiregs *) SCpnt->device->host->base;
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pr_debug("dma_stop: status<%d> ", status);
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/* First stop the HPC and flush it's FIFO. */
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if (hdata->wh.dma_dir) {
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hregs->ctrl |= HPC3_SCTRL_FLUSH;
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while (hregs->ctrl & HPC3_SCTRL_ACTIVE)
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barrier();
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}
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hregs->ctrl = 0;
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dma_unmap_single(hdata->dev, SCpnt->SCp.dma_handle,
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SCpnt->SCp.this_residual,
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DMA_DIR(hdata->wh.dma_dir));
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pr_debug("\n");
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}
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void sgiwd93_reset(unsigned long base)
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{
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struct hpc3_scsiregs *hregs = (struct hpc3_scsiregs *) base;
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hregs->ctrl = HPC3_SCTRL_CRESET;
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udelay(50);
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hregs->ctrl = 0;
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}
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EXPORT_SYMBOL_GPL(sgiwd93_reset);
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static inline void init_hpc_chain(struct ip22_hostdata *hdata)
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{
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struct hpc_chunk *hcp = (struct hpc_chunk *)hdata->cpu;
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dma_addr_t dma = hdata->dma;
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unsigned long start, end;
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start = (unsigned long) hcp;
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end = start + HPC_DMA_SIZE;
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while (start < end) {
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hcp->desc.pnext = (u32) (dma + sizeof(struct hpc_chunk));
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hcp->desc.cntinfo = HPCDMA_EOX;
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hcp++;
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dma += sizeof(struct hpc_chunk);
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start += sizeof(struct hpc_chunk);
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};
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hcp--;
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hcp->desc.pnext = hdata->dma;
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}
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static int sgiwd93_bus_reset(struct scsi_cmnd *cmd)
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{
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/* FIXME perform bus-specific reset */
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/* FIXME 2: kill this function, and let midlayer fallback
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to the same result, calling wd33c93_host_reset() */
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spin_lock_irq(cmd->device->host->host_lock);
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wd33c93_host_reset(cmd);
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spin_unlock_irq(cmd->device->host->host_lock);
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return SUCCESS;
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}
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/*
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* Kludge alert - the SCSI code calls the abort and reset method with int
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* arguments not with pointers. So this is going to blow up beautyfully
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* on 64-bit systems with memory outside the compat address spaces.
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*/
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static struct scsi_host_template sgiwd93_template = {
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.module = THIS_MODULE,
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.proc_name = "SGIWD93",
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.name = "SGI WD93",
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.queuecommand = wd33c93_queuecommand,
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.eh_abort_handler = wd33c93_abort,
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.eh_bus_reset_handler = sgiwd93_bus_reset,
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.eh_host_reset_handler = wd33c93_host_reset,
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.can_queue = 16,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = 8,
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.use_clustering = DISABLE_CLUSTERING,
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};
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static int sgiwd93_probe(struct platform_device *pdev)
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{
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struct sgiwd93_platform_data *pd = pdev->dev.platform_data;
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unsigned char *wdregs = pd->wdregs;
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struct hpc3_scsiregs *hregs = pd->hregs;
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struct ip22_hostdata *hdata;
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struct Scsi_Host *host;
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wd33c93_regs regs;
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unsigned int unit = pd->unit;
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unsigned int irq = pd->irq;
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int err;
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host = scsi_host_alloc(&sgiwd93_template, sizeof(struct ip22_hostdata));
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if (!host) {
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err = -ENOMEM;
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goto out;
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}
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host->base = (unsigned long) hregs;
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host->irq = irq;
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hdata = host_to_hostdata(host);
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hdata->dev = &pdev->dev;
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hdata->cpu = dma_alloc_noncoherent(&pdev->dev, HPC_DMA_SIZE,
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&hdata->dma, GFP_KERNEL);
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if (!hdata->cpu) {
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printk(KERN_WARNING "sgiwd93: Could not allocate memory for "
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"host %d buffer.\n", unit);
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err = -ENOMEM;
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goto out_put;
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}
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init_hpc_chain(hdata);
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regs.SASR = wdregs + 3;
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regs.SCMD = wdregs + 7;
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hdata->wh.no_sync = 0;
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hdata->wh.fast = 1;
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hdata->wh.dma_mode = CTRL_BURST;
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wd33c93_init(host, regs, dma_setup, dma_stop, WD33C93_FS_MHZ(20));
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err = request_irq(irq, sgiwd93_intr, 0, "SGI WD93", host);
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if (err) {
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printk(KERN_WARNING "sgiwd93: Could not register irq %d "
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"for host %d.\n", irq, unit);
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goto out_free;
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}
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platform_set_drvdata(pdev, host);
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err = scsi_add_host(host, NULL);
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if (err)
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goto out_irq;
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scsi_scan_host(host);
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return 0;
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out_irq:
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free_irq(irq, host);
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out_free:
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dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma);
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out_put:
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scsi_host_put(host);
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out:
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return err;
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}
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static int __exit sgiwd93_remove(struct platform_device *pdev)
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{
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struct Scsi_Host *host = platform_get_drvdata(pdev);
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struct ip22_hostdata *hdata = (struct ip22_hostdata *) host->hostdata;
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struct sgiwd93_platform_data *pd = pdev->dev.platform_data;
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scsi_remove_host(host);
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free_irq(pd->irq, host);
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dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma);
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scsi_host_put(host);
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return 0;
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}
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static struct platform_driver sgiwd93_driver = {
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.probe = sgiwd93_probe,
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.remove = sgiwd93_remove,
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.driver = {
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.name = "sgiwd93",
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.owner = THIS_MODULE,
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}
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};
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static int __init sgiwd93_module_init(void)
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{
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return platform_driver_register(&sgiwd93_driver);
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}
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static void __exit sgiwd93_module_exit(void)
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{
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return platform_driver_unregister(&sgiwd93_driver);
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}
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module_init(sgiwd93_module_init);
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module_exit(sgiwd93_module_exit);
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MODULE_DESCRIPTION("SGI WD33C93 driver");
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MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:sgiwd93");
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