* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
* Copyright (C) 1999 Andrew R. Baker (andrewb@uab.edu)
* Copyright (C) 2001 Florian Lohoff (flo@rfc822.org)
- * Copyright (C) 2003 Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2003, 07 Ralf Baechle (ralf@linux-mips.org)
*
* (In all truth, Jed Schimmel wrote all this code.)
*/
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/blkdev.h>
-#include <linux/version.h>
+
+#undef DEBUG
+
#include <linux/delay.h>
#include <linux/dma-mapping.h>
+#include <linux/gfp.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/spinlock.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/sgialib.h>
-#include <asm/sgi/sgi.h>
-#include <asm/sgi/mc.h>
#include <asm/sgi/hpc3.h>
#include <asm/sgi/ip22.h>
-#include <asm/irq.h>
-#include <asm/io.h>
+#include <asm/sgi/wd.h>
#include "scsi.h"
-#include <scsi/scsi_host.h>
#include "wd33c93.h"
-#include "sgiwd93.h"
-
-#include <linux/stat.h>
-
-#if 0
-#define DPRINTK(args...) printk(args)
-#else
-#define DPRINTK(args...)
-#endif
-
-#define HDATA(ptr) ((struct ip22_hostdata *)((ptr)->hostdata))
struct ip22_hostdata {
struct WD33C93_hostdata wh;
- struct hpc_data {
- dma_addr_t dma;
- void * cpu;
- } hd;
+ dma_addr_t dma;
+ void *cpu;
+ struct device *dev;
};
+#define host_to_hostdata(host) ((struct ip22_hostdata *)((host)->hostdata))
+
struct hpc_chunk {
struct hpc_dma_desc desc;
u32 _padding; /* align to quadword boundary */
};
-struct Scsi_Host *sgiwd93_host;
-struct Scsi_Host *sgiwd93_host1;
+/* space for hpc dma descriptors */
+#define HPC_DMA_SIZE PAGE_SIZE
-/* Wuff wuff, wuff, wd33c93.c, wuff wuff, object oriented, bow wow. */
-static inline void write_wd33c93_count(const wd33c93_regs regs,
- unsigned long value)
-{
- *regs.SASR = WD_TRANSFER_COUNT_MSB;
- mb();
- *regs.SCMD = ((value >> 16) & 0xff);
- *regs.SCMD = ((value >> 8) & 0xff);
- *regs.SCMD = ((value >> 0) & 0xff);
- mb();
-}
-
-static inline unsigned long read_wd33c93_count(const wd33c93_regs regs)
-{
- unsigned long value;
-
- *regs.SASR = WD_TRANSFER_COUNT_MSB;
- mb();
- value = ((*regs.SCMD & 0xff) << 16);
- value |= ((*regs.SCMD & 0xff) << 8);
- value |= ((*regs.SCMD & 0xff) << 0);
- mb();
- return value;
-}
+#define DMA_DIR(d) ((d == DATA_OUT_DIR) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
-static irqreturn_t sgiwd93_intr(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t sgiwd93_intr(int irq, void *dev_id)
{
- struct Scsi_Host * host = (struct Scsi_Host *) dev_id;
+ struct Scsi_Host * host = dev_id;
unsigned long flags;
spin_lock_irqsave(host->host_lock, flags);
}
static inline
-void fill_hpc_entries(struct hpc_chunk *hcp, Scsi_Cmnd *cmd, int datainp)
+void fill_hpc_entries(struct ip22_hostdata *hd, struct scsi_cmnd *cmd, int din)
{
unsigned long len = cmd->SCp.this_residual;
void *addr = cmd->SCp.ptr;
dma_addr_t physaddr;
unsigned long count;
+ struct hpc_chunk *hcp;
- physaddr = dma_map_single(NULL, addr, len, cmd->sc_data_direction);
+ physaddr = dma_map_single(hd->dev, addr, len, DMA_DIR(din));
cmd->SCp.dma_handle = physaddr;
+ hcp = hd->cpu;
while (len) {
/*
*/
hcp->desc.pbuf = 0;
hcp->desc.cntinfo = HPCDMA_EOX;
+ dma_cache_sync(hd->dev, hd->cpu,
+ (unsigned long)(hcp + 1) - (unsigned long)hd->cpu,
+ DMA_TO_DEVICE);
}
-static int dma_setup(Scsi_Cmnd *cmd, int datainp)
+static int dma_setup(struct scsi_cmnd *cmd, int datainp)
{
- struct ip22_hostdata *hdata = HDATA(cmd->device->host);
+ struct ip22_hostdata *hdata = host_to_hostdata(cmd->device->host);
struct hpc3_scsiregs *hregs =
(struct hpc3_scsiregs *) cmd->device->host->base;
- struct hpc_chunk *hcp = (struct hpc_chunk *) hdata->hd.cpu;
- DPRINTK("dma_setup: datainp<%d> hcp<%p> ", datainp, hcp);
+ pr_debug("dma_setup: datainp<%d> hcp<%p> ", datainp, hdata->cpu);
hdata->wh.dma_dir = datainp;
if (cmd->SCp.ptr == NULL || cmd->SCp.this_residual == 0)
return 1;
- fill_hpc_entries(hcp, cmd, datainp);
+ fill_hpc_entries(hdata, cmd, datainp);
- DPRINTK(" HPCGO\n");
+ pr_debug(" HPCGO\n");
/* Start up the HPC. */
- hregs->ndptr = hdata->hd.dma;
+ hregs->ndptr = hdata->dma;
if (datainp)
hregs->ctrl = HPC3_SCTRL_ACTIVE;
else
return 0;
}
-static void dma_stop(struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
+static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
int status)
{
- struct ip22_hostdata *hdata = HDATA(instance);
+ struct ip22_hostdata *hdata = host_to_hostdata(instance);
struct hpc3_scsiregs *hregs;
if (!SCpnt)
return;
+ if (SCpnt->SCp.ptr == NULL || SCpnt->SCp.this_residual == 0)
+ return;
+
hregs = (struct hpc3_scsiregs *) SCpnt->device->host->base;
- DPRINTK("dma_stop: status<%d> ", status);
+ pr_debug("dma_stop: status<%d> ", status);
/* First stop the HPC and flush it's FIFO. */
if (hdata->wh.dma_dir) {
barrier();
}
hregs->ctrl = 0;
- dma_unmap_single(NULL, SCpnt->SCp.dma_handle, SCpnt->SCp.this_residual,
- SCpnt->sc_data_direction);
+ dma_unmap_single(hdata->dev, SCpnt->SCp.dma_handle,
+ SCpnt->SCp.this_residual,
+ DMA_DIR(hdata->wh.dma_dir));
- DPRINTK("\n");
+ pr_debug("\n");
}
void sgiwd93_reset(unsigned long base)
udelay(50);
hregs->ctrl = 0;
}
+EXPORT_SYMBOL_GPL(sgiwd93_reset);
-static inline void init_hpc_chain(struct hpc_data *hd)
+static inline void init_hpc_chain(struct ip22_hostdata *hdata)
{
- struct hpc_chunk *hcp = (struct hpc_chunk *) hd->cpu;
- struct hpc_chunk *dma = (struct hpc_chunk *) hd->dma;
+ struct hpc_chunk *hcp = (struct hpc_chunk *)hdata->cpu;
+ dma_addr_t dma = hdata->dma;
unsigned long start, end;
start = (unsigned long) hcp;
- end = start + PAGE_SIZE;
+ end = start + HPC_DMA_SIZE;
while (start < end) {
- hcp->desc.pnext = (u32) (dma + 1);
+ hcp->desc.pnext = (u32) (dma + sizeof(struct hpc_chunk));
hcp->desc.cntinfo = HPCDMA_EOX;
- hcp++; dma++;
+ hcp++;
+ dma += sizeof(struct hpc_chunk);
start += sizeof(struct hpc_chunk);
};
hcp--;
- hcp->desc.pnext = hd->dma;
+ hcp->desc.pnext = hdata->dma;
}
-static struct Scsi_Host * __init sgiwd93_setup_scsi(
- Scsi_Host_Template *SGIblows, int unit, int irq,
- struct hpc3_scsiregs *hregs, unsigned char *wdregs)
+static int sgiwd93_bus_reset(struct scsi_cmnd *cmd)
{
+ /* FIXME perform bus-specific reset */
+
+ /* FIXME 2: kill this function, and let midlayer fallback
+ to the same result, calling wd33c93_host_reset() */
+
+ spin_lock_irq(cmd->device->host->host_lock);
+ wd33c93_host_reset(cmd);
+ spin_unlock_irq(cmd->device->host->host_lock);
+
+ return SUCCESS;
+}
+
+/*
+ * Kludge alert - the SCSI code calls the abort and reset method with int
+ * arguments not with pointers. So this is going to blow up beautyfully
+ * on 64-bit systems with memory outside the compat address spaces.
+ */
+static struct scsi_host_template sgiwd93_template = {
+ .module = THIS_MODULE,
+ .proc_name = "SGIWD93",
+ .name = "SGI WD93",
+ .queuecommand = wd33c93_queuecommand,
+ .eh_abort_handler = wd33c93_abort,
+ .eh_bus_reset_handler = sgiwd93_bus_reset,
+ .eh_host_reset_handler = wd33c93_host_reset,
+ .can_queue = 16,
+ .this_id = 7,
+ .sg_tablesize = SG_ALL,
+ .cmd_per_lun = 8,
+ .use_clustering = DISABLE_CLUSTERING,
+};
+
+static int __devinit sgiwd93_probe(struct platform_device *pdev)
+{
+ struct sgiwd93_platform_data *pd = pdev->dev.platform_data;
+ unsigned char *wdregs = pd->wdregs;
+ struct hpc3_scsiregs *hregs = pd->hregs;
struct ip22_hostdata *hdata;
struct Scsi_Host *host;
wd33c93_regs regs;
-
- host = scsi_register(SGIblows, sizeof(struct ip22_hostdata));
- if (!host)
- return NULL;
+ unsigned int unit = pd->unit;
+ unsigned int irq = pd->irq;
+ int err;
+
+ host = scsi_host_alloc(&sgiwd93_template, sizeof(struct ip22_hostdata));
+ if (!host) {
+ err = -ENOMEM;
+ goto out;
+ }
host->base = (unsigned long) hregs;
host->irq = irq;
- hdata = HDATA(host);
- hdata->hd.cpu = dma_alloc_coherent(NULL, PAGE_SIZE, &hdata->hd.dma,
- GFP_KERNEL);
- if (!hdata->hd.cpu) {
+ hdata = host_to_hostdata(host);
+ hdata->dev = &pdev->dev;
+ hdata->cpu = dma_alloc_noncoherent(&pdev->dev, HPC_DMA_SIZE,
+ &hdata->dma, GFP_KERNEL);
+ if (!hdata->cpu) {
printk(KERN_WARNING "sgiwd93: Could not allocate memory for "
"host %d buffer.\n", unit);
- goto out_unregister;
+ err = -ENOMEM;
+ goto out_put;
}
- init_hpc_chain(&hdata->hd);
+
+ init_hpc_chain(hdata);
regs.SASR = wdregs + 3;
regs.SCMD = wdregs + 7;
- wd33c93_init(host, regs, dma_setup, dma_stop, WD33C93_FS_16_20);
-
hdata->wh.no_sync = 0;
+ hdata->wh.fast = 1;
+ hdata->wh.dma_mode = CTRL_BURST;
- if (request_irq(irq, sgiwd93_intr, 0, "SGI WD93", (void *) host)) {
+ wd33c93_init(host, regs, dma_setup, dma_stop, WD33C93_FS_MHZ(20));
+
+ err = request_irq(irq, sgiwd93_intr, 0, "SGI WD93", host);
+ if (err) {
printk(KERN_WARNING "sgiwd93: Could not register irq %d "
"for host %d.\n", irq, unit);
goto out_free;
}
- return host;
-out_free:
- dma_free_coherent(NULL, PAGE_SIZE, hdata->hd.cpu, hdata->hd.dma);
- wd33c93_release();
+ platform_set_drvdata(pdev, host);
-out_unregister:
- scsi_unregister(host);
+ err = scsi_add_host(host, NULL);
+ if (err)
+ goto out_irq;
- return NULL;
-}
+ scsi_scan_host(host);
-int __init sgiwd93_detect(Scsi_Host_Template *SGIblows)
-{
- int found = 0;
-
- SGIblows->proc_name = "SGIWD93";
- sgiwd93_host = sgiwd93_setup_scsi(SGIblows, 0, SGI_WD93_0_IRQ,
- &hpc3c0->scsi_chan0,
- (unsigned char *)hpc3c0->scsi0_ext);
- if (sgiwd93_host)
- found++;
-
- /* Set up second controller on the Indigo2 */
- if (ip22_is_fullhouse()) {
- sgiwd93_host1 = sgiwd93_setup_scsi(SGIblows, 1, SGI_WD93_1_IRQ,
- &hpc3c0->scsi_chan1,
- (unsigned char *)hpc3c0->scsi1_ext);
- if (sgiwd93_host1)
- found++;
- }
+ return 0;
- return found;
+out_irq:
+ free_irq(irq, host);
+out_free:
+ dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma);
+out_put:
+ scsi_host_put(host);
+out:
+
+ return err;
}
-int sgiwd93_release(struct Scsi_Host *instance)
+static int __exit sgiwd93_remove(struct platform_device *pdev)
{
- struct ip22_hostdata *hdata = HDATA(instance);
- int irq = 0;
-
- if (sgiwd93_host && sgiwd93_host == instance)
- irq = SGI_WD93_0_IRQ;
- else if (sgiwd93_host1 && sgiwd93_host1 == instance)
- irq = SGI_WD93_1_IRQ;
+ struct Scsi_Host *host = platform_get_drvdata(pdev);
+ struct ip22_hostdata *hdata = (struct ip22_hostdata *) host->hostdata;
+ struct sgiwd93_platform_data *pd = pdev->dev.platform_data;
+
+ scsi_remove_host(host);
+ free_irq(pd->irq, host);
+ dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma);
+ scsi_host_put(host);
+ return 0;
+}
- free_irq(irq, sgiwd93_intr);
- dma_free_coherent(NULL, PAGE_SIZE, hdata->hd.cpu, hdata->hd.dma);
- wd33c93_release();
+static struct platform_driver sgiwd93_driver = {
+ .probe = sgiwd93_probe,
+ .remove = __devexit_p(sgiwd93_remove),
+ .driver = {
+ .name = "sgiwd93",
+ .owner = THIS_MODULE,
+ }
+};
- return 1;
+static int __init sgiwd93_module_init(void)
+{
+ return platform_driver_register(&sgiwd93_driver);
}
-static int sgiwd93_bus_reset(Scsi_Cmnd *cmd)
+static void __exit sgiwd93_module_exit(void)
{
- /* FIXME perform bus-specific reset */
-
- /* FIXME 2: kill this function, and let midlayer fallback
- to the same result, calling wd33c93_host_reset() */
-
- spin_lock_irq(cmd->device->host->host_lock);
- wd33c93_host_reset(cmd);
- spin_unlock_irq(cmd->device->host->host_lock);
-
- return SUCCESS;
+ return platform_driver_unregister(&sgiwd93_driver);
}
-/*
- * Kludge alert - the SCSI code calls the abort and reset method with int
- * arguments not with pointers. So this is going to blow up beautyfully
- * on 64-bit systems with memory outside the compat address spaces.
- */
-static Scsi_Host_Template driver_template = {
- .proc_name = "SGIWD93",
- .name = "SGI WD93",
- .detect = sgiwd93_detect,
- .release = sgiwd93_release,
- .queuecommand = wd33c93_queuecommand,
- .eh_abort_handler = wd33c93_abort,
- .eh_bus_reset_handler = sgiwd93_bus_reset,
- .eh_host_reset_handler = wd33c93_host_reset,
- .can_queue = CAN_QUEUE,
- .this_id = 7,
- .sg_tablesize = SG_ALL,
- .cmd_per_lun = CMD_PER_LUN,
- .use_clustering = DISABLE_CLUSTERING,
-};
-#include "scsi_module.c"
+module_init(sgiwd93_module_init);
+module_exit(sgiwd93_module_exit);
+
+MODULE_DESCRIPTION("SGI WD33C93 driver");
+MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:sgiwd93");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff