tx4938ide: Do not call devm_ioremap for whole 128KB

[linux-2.6-omap-h63xx.git] / drivers / ide / tx4938ide.c

diff --git a/drivers/ide/tx4938ide.c b/drivers/ide/tx4938ide.c
index fa660f931a117a0477c782a57dc9af0f3aa91309..796289cf97e0fb5234f0eb49b582a644069f144e 100644 (file)
--- a/drivers/ide/tx4938ide.c
+++ b/drivers/ide/tx4938ide.c
@@ -39,10 +39,17 @@ static void tx4938ide_tune_ebusc(unsigned int ebus_ch,
        /* Address-valid to DIOR/DIOW setup */
        shwt = DIV_ROUND_UP(t->setup, cycle);
 
+       /* -DIOx recovery time (SHWT * 4) and cycle time requirement */
+       while ((shwt * 4 + wt + (wt ? 2 : 3)) * cycle < t->cycle)
+               shwt++;
+       if (shwt > 7) {
+               pr_warning("tx4938ide: SHWT violation (%d)\n", shwt);
+               shwt = 7;
+       }
        pr_debug("tx4938ide: ebus %d, bus cycle %dns, WT %d, SHWT %d\n",
                 ebus_ch, cycle, wt, shwt);
 
-       __raw_writeq((cr & ~(0x3f007ull)) | (wt << 12) | shwt,
+       __raw_writeq((cr & ~0x3f007ull) | (wt << 12) | shwt,
                     &tx4938_ebuscptr->cr[ebus_ch]);
 }
 
@@ -228,7 +235,7 @@ static int __init tx4938ide_probe(struct platform_device *pdev)
        struct resource *res;
        struct tx4938ide_platform_info *pdata = pdev->dev.platform_data;
        int irq, ret, i;
-       unsigned long mapbase;
+       unsigned long mapbase, mapctl;
        struct ide_port_info d = tx4938ide_port_info;
 
        irq = platform_get_irq(pdev, 0);
@@ -242,38 +249,43 @@ static int __init tx4938ide_probe(struct platform_device *pdev)
                                     res->end - res->start + 1, "tx4938ide"))
                return -EBUSY;
        mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
-                                             res->end - res->start + 1);
-       if (!mapbase)
+                                             8 << pdata->ioport_shift);
+       mapctl = (unsigned long)devm_ioremap(&pdev->dev,
+                                            res->start + 0x10000 +
+                                            (6 << pdata->ioport_shift),
+                                            1 << pdata->ioport_shift);
+       if (!mapbase || !mapctl)
                return -EBUSY;
 
        memset(&hw, 0, sizeof(hw));
        if (pdata->ioport_shift) {
                unsigned long port = mapbase;
+               unsigned long ctl = mapctl;
 
                hw.io_ports_array[0] = port;
 #ifdef __BIG_ENDIAN
                port++;
+               ctl++;
 #endif
                for (i = 1; i <= 7; i++)
                        hw.io_ports_array[i] =
                                port + (i << pdata->ioport_shift);
-               hw.io_ports.ctl_addr =
-                       port + 0x10000 + (6 << pdata->ioport_shift);
+               hw.io_ports.ctl_addr = ctl;
        } else
-               ide_std_init_ports(&hw, mapbase, mapbase + 0x10006);
+               ide_std_init_ports(&hw, mapbase, mapctl);
        hw.irq = irq;
        hw.dev = &pdev->dev;
 
-       pr_info("TX4938 IDE interface (base %#lx, irq %d)\n", mapbase, hw.irq);
+       pr_info("TX4938 IDE interface (base %#lx, ctl %#lx, irq %d)\n",
+               mapbase, mapctl, hw.irq);
        if (pdata->gbus_clock)
                tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, 0);
        else
                d.port_ops = NULL;
        ret = ide_host_add(&d, hws, &host);
-       if (ret)
-               return ret;
-       platform_set_drvdata(pdev, host);
-       return 0;
+       if (!ret)
+               platform_set_drvdata(pdev, host);
+       return ret;
 }
 
 static int __exit tx4938ide_remove(struct platform_device *pdev)