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path: root/drivers/ide/pci/sc1200.c
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Diffstat (limited to 'drivers/ide/pci/sc1200.c')
-rw-r--r--drivers/ide/pci/sc1200.c178
1 files changed, 58 insertions, 120 deletions
diff --git a/drivers/ide/pci/sc1200.c b/drivers/ide/pci/sc1200.c
index 707d5ff66b0..32fdf53379f 100644
--- a/drivers/ide/pci/sc1200.c
+++ b/drivers/ide/pci/sc1200.c
@@ -135,59 +135,29 @@ static void sc1200_set_dma_mode(ide_drive_t *drive, const u8 mode)
unsigned short pci_clock;
unsigned int basereg = hwif->channel ? 0x50 : 0x40;
+ static const u32 udma_timing[3][3] = {
+ { 0x00921250, 0x00911140, 0x00911030 },
+ { 0x00932470, 0x00922260, 0x00922140 },
+ { 0x009436a1, 0x00933481, 0x00923261 },
+ };
+
+ static const u32 mwdma_timing[3][3] = {
+ { 0x00077771, 0x00012121, 0x00002020 },
+ { 0x000bbbb2, 0x00024241, 0x00013131 },
+ { 0x000ffff3, 0x00035352, 0x00015151 },
+ };
+
pci_clock = sc1200_get_pci_clock();
/*
* Note that each DMA mode has several timings associated with it.
* The correct timing depends on the fast PCI clock freq.
*/
- timings = 0;
- switch (mode) {
- case XFER_UDMA_0:
- switch (pci_clock) {
- case PCI_CLK_33: timings = 0x00921250; break;
- case PCI_CLK_48: timings = 0x00932470; break;
- case PCI_CLK_66: timings = 0x009436a1; break;
- }
- break;
- case XFER_UDMA_1:
- switch (pci_clock) {
- case PCI_CLK_33: timings = 0x00911140; break;
- case PCI_CLK_48: timings = 0x00922260; break;
- case PCI_CLK_66: timings = 0x00933481; break;
- }
- break;
- case XFER_UDMA_2:
- switch (pci_clock) {
- case PCI_CLK_33: timings = 0x00911030; break;
- case PCI_CLK_48: timings = 0x00922140; break;
- case PCI_CLK_66: timings = 0x00923261; break;
- }
- break;
- case XFER_MW_DMA_0:
- switch (pci_clock) {
- case PCI_CLK_33: timings = 0x00077771; break;
- case PCI_CLK_48: timings = 0x000bbbb2; break;
- case PCI_CLK_66: timings = 0x000ffff3; break;
- }
- break;
- case XFER_MW_DMA_1:
- switch (pci_clock) {
- case PCI_CLK_33: timings = 0x00012121; break;
- case PCI_CLK_48: timings = 0x00024241; break;
- case PCI_CLK_66: timings = 0x00035352; break;
- }
- break;
- case XFER_MW_DMA_2:
- switch (pci_clock) {
- case PCI_CLK_33: timings = 0x00002020; break;
- case PCI_CLK_48: timings = 0x00013131; break;
- case PCI_CLK_66: timings = 0x00015151; break;
- }
- break;
- default:
- return;
- }
+
+ if (mode >= XFER_UDMA_0)
+ timings = udma_timing[pci_clock][mode - XFER_UDMA_0];
+ else
+ timings = mwdma_timing[pci_clock][mode - XFER_MW_DMA_0];
if (unit == 0) { /* are we configuring drive0? */
pci_read_config_dword(hwif->pci_dev, basereg+4, &reg);
@@ -250,9 +220,9 @@ static void sc1200_set_pio_mode(ide_drive_t *drive, const u8 pio)
}
if (mode != -1) {
printk("SC1200: %s: changing (U)DMA mode\n", drive->name);
- hwif->dma_off_quietly(drive);
- if (ide_set_dma_mode(drive, mode) == 0)
- hwif->dma_host_on(drive);
+ ide_dma_off_quietly(drive);
+ if (ide_set_dma_mode(drive, mode) == 0 && drive->using_dma)
+ hwif->dma_host_set(drive, 1);
return;
}
@@ -260,66 +230,39 @@ static void sc1200_set_pio_mode(ide_drive_t *drive, const u8 pio)
}
#ifdef CONFIG_PM
-static ide_hwif_t *lookup_pci_dev (ide_hwif_t *prev, struct pci_dev *dev)
-{
- int h;
-
- for (h = 0; h < MAX_HWIFS; h++) {
- ide_hwif_t *hwif = &ide_hwifs[h];
- if (prev) {
- if (hwif == prev)
- prev = NULL; // found previous, now look for next match
- } else {
- if (hwif && hwif->pci_dev == dev)
- return hwif; // found next match
- }
- }
- return NULL; // not found
-}
-
-typedef struct sc1200_saved_state_s {
- __u32 regs[4];
-} sc1200_saved_state_t;
-
+struct sc1200_saved_state {
+ u32 regs[8];
+};
static int sc1200_suspend (struct pci_dev *dev, pm_message_t state)
{
- ide_hwif_t *hwif = NULL;
-
printk("SC1200: suspend(%u)\n", state.event);
+ /*
+ * we only save state when going from full power to less
+ */
if (state.event == PM_EVENT_ON) {
- // we only save state when going from full power to less
-
- //
- // Loop over all interfaces that are part of this PCI device:
- //
- while ((hwif = lookup_pci_dev(hwif, dev)) != NULL) {
- sc1200_saved_state_t *ss;
- unsigned int basereg, r;
- //
- // allocate a permanent save area, if not already allocated
- //
- ss = (sc1200_saved_state_t *)hwif->config_data;
- if (ss == NULL) {
- ss = kmalloc(sizeof(sc1200_saved_state_t), GFP_KERNEL);
- if (ss == NULL)
- return -ENOMEM;
- hwif->config_data = (unsigned long)ss;
- }
- ss = (sc1200_saved_state_t *)hwif->config_data;
- //
- // Save timing registers: this may be unnecessary if
- // BIOS also does it
- //
- basereg = hwif->channel ? 0x50 : 0x40;
- for (r = 0; r < 4; ++r) {
- pci_read_config_dword (hwif->pci_dev, basereg + (r<<2), &ss->regs[r]);
- }
+ struct sc1200_saved_state *ss;
+ unsigned int r;
+
+ /*
+ * allocate a permanent save area, if not already allocated
+ */
+ ss = (struct sc1200_saved_state *)pci_get_drvdata(dev);
+ if (ss == NULL) {
+ ss = kmalloc(sizeof(*ss), GFP_KERNEL);
+ if (ss == NULL)
+ return -ENOMEM;
+ pci_set_drvdata(dev, ss);
}
- }
- /* You don't need to iterate over disks -- sysfs should have done that for you already */
+ /*
+ * save timing registers
+ * (this may be unnecessary if BIOS also does it)
+ */
+ for (r = 0; r < 8; r++)
+ pci_read_config_dword(dev, 0x40 + r * 4, &ss->regs[r]);
+ }
pci_disable_device(dev);
pci_set_power_state(dev, pci_choose_state(dev, state));
@@ -328,30 +271,25 @@ static int sc1200_suspend (struct pci_dev *dev, pm_message_t state)
static int sc1200_resume (struct pci_dev *dev)
{
- ide_hwif_t *hwif = NULL;
- int i;
+ struct sc1200_saved_state *ss;
+ unsigned int r;
+ int i;
i = pci_enable_device(dev);
if (i)
return i;
- //
- // loop over all interfaces that are part of this pci device:
- //
- while ((hwif = lookup_pci_dev(hwif, dev)) != NULL) {
- unsigned int basereg, r;
- sc1200_saved_state_t *ss = (sc1200_saved_state_t *)hwif->config_data;
-
- //
- // Restore timing registers: this may be unnecessary if BIOS also does it
- //
- basereg = hwif->channel ? 0x50 : 0x40;
- if (ss != NULL) {
- for (r = 0; r < 4; ++r) {
- pci_write_config_dword(hwif->pci_dev, basereg + (r<<2), ss->regs[r]);
- }
- }
+ ss = (struct sc1200_saved_state *)pci_get_drvdata(dev);
+
+ /*
+ * restore timing registers
+ * (this may be unnecessary if BIOS also does it)
+ */
+ if (ss) {
+ for (r = 0; r < 8; r++)
+ pci_write_config_dword(dev, 0x40 + r * 4, ss->regs[r]);
}
+
return 0;
}
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-24 22:19:19 +0000