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Subject[PATCH] pata_cs5530: suspend/resume support
The 5530 needs various set up performing both at init time and resume
time. To keep the code clean the common setup code is moved into a new
function and called from both handlers.

Signed-off-by: Alan Cox <alan@redhat.com>

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.19-rc5-mm2/drivers/ata/pata_cs5530.c linux-2.6.19-rc5-mm2/drivers/ata/pata_cs5530.c
--- linux.vanilla-2.6.19-rc5-mm2/drivers/ata/pata_cs5530.c 2006-11-15 13:25:59.000000000 +0000
+++ linux-2.6.19-rc5-mm2/drivers/ata/pata_cs5530.c 2006-11-22 15:01:53.385334272 +0000
@@ -35,7 +35,7 @@
#include <linux/dmi.h>

#define DRV_NAME "pata_cs5530"
-#define DRV_VERSION "0.6"
+#define DRV_VERSION "0.7.1"

/**
* cs5530_set_piomode - PIO setup
@@ -181,6 +181,8 @@
.dma_boundary = ATA_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.bios_param = ata_std_bios_param,
+ .resume = ata_scsi_device_resume,
+ .suspend = ata_scsi_device_suspend,
};

static struct ata_port_operations cs5530_port_ops = {
@@ -238,38 +240,18 @@
return 0;
}

+
/**
- * cs5530_init_one - Initialise a CS5530
- * @dev: PCI device
- * @id: Entry in match table
+ * cs5530_init_chip - Chipset init
*
- * Install a driver for the newly found CS5530 companion chip. Most of
- * this is just housekeeping. We have to set the chip up correctly and
- * turn off various bits of emulation magic.
+ * Perform the chip initialisation work that is shared between both
+ * setup and resume paths
*/
-
-static int cs5530_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+
+static int cs5530_init_chip(void)
{
- int compiler_warning_pointless_fix;
- struct pci_dev *master_0 = NULL, *cs5530_0 = NULL;
- static struct ata_port_info info = {
- .sht = &cs5530_sht,
- .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
- .pio_mask = 0x1f,
- .mwdma_mask = 0x07,
- .udma_mask = 0x07,
- .port_ops = &cs5530_port_ops
- };
- /* The docking connector doesn't do UDMA, and it seems not MWDMA */
- static struct ata_port_info info_palmax_secondary = {
- .sht = &cs5530_sht,
- .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
- .pio_mask = 0x1f,
- .port_ops = &cs5530_port_ops
- };
- static struct ata_port_info *port_info[2] = { &info, &info };
+ struct pci_dev *master_0 = NULL, *cs5530_0 = NULL, *dev = NULL;

- dev = NULL;
while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) {
switch (dev->device) {
case PCI_DEVICE_ID_CYRIX_PCI_MASTER:
@@ -290,7 +272,7 @@
}

pci_set_master(cs5530_0);
- compiler_warning_pointless_fix = pci_set_mwi(cs5530_0);
+ pci_set_mwi(cs5530_0);

/*
* Set PCI CacheLineSize to 16-bytes:
@@ -338,13 +320,7 @@

pci_dev_put(master_0);
pci_dev_put(cs5530_0);
-
- if (cs5530_is_palmax())
- port_info[1] = &info_palmax_secondary;
-
- /* Now kick off ATA set up */
- return ata_pci_init_one(dev, port_info, 2);
-
+ return 0;
fail_put:
if (master_0)
pci_dev_put(master_0);
@@ -353,6 +329,53 @@
return -ENODEV;
}

+/**
+ * cs5530_init_one - Initialise a CS5530
+ * @dev: PCI device
+ * @id: Entry in match table
+ *
+ * Install a driver for the newly found CS5530 companion chip. Most of
+ * this is just housekeeping. We have to set the chip up correctly and
+ * turn off various bits of emulation magic.
+ */
+
+static int cs5530_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ static struct ata_port_info info = {
+ .sht = &cs5530_sht,
+ .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .udma_mask = 0x07,
+ .port_ops = &cs5530_port_ops
+ };
+ /* The docking connector doesn't do UDMA, and it seems not MWDMA */
+ static struct ata_port_info info_palmax_secondary = {
+ .sht = &cs5530_sht,
+ .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .port_ops = &cs5530_port_ops
+ };
+ static struct ata_port_info *port_info[2] = { &info, &info };
+
+ /* Chip initialisation */
+ if (cs5530_init_chip())
+ return -ENODEV;
+
+ if (cs5530_is_palmax())
+ port_info[1] = &info_palmax_secondary;
+
+ /* Now kick off ATA set up */
+ return ata_pci_init_one(pdev, port_info, 2);
+}
+
+static int cs5530_reinit_one(struct pci_dev *pdev)
+{
+ /* If we fail on resume we are doomed */
+ BUG_ON(cs5530_init_chip());
+ return ata_pci_device_resume(pdev);
+}
+
static const struct pci_device_id cs5530[] = {
{ PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_IDE), },

@@ -363,7 +386,9 @@
.name = DRV_NAME,
.id_table = cs5530,
.probe = cs5530_init_one,
- .remove = ata_pci_remove_one
+ .remove = ata_pci_remove_one,
+ .suspend = ata_pci_device_suspend,
+ .resume = cs5530_reinit_one,
};

static int __init cs5530_init(void)
-
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