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mmc: extend ricoh_mmc to support Ricoh RL5c476 

This patch adds support for the Ricoh RL5c476 chip: with this
the mmc adapter that needs this disabler (R5C843) can also be
handled correctly when it sits on a RL5c476.

Signed-off-by: Frank Seidel <fseidel@suse.de>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Frank Seidel 2008-02-04 19:25:42 +01:00 committed by Pierre Ossman
parent 6e996ee8e7
commit 882c49164d
1 changed files with 80 additions and 21 deletions
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101
drivers/mmc/host/ricoh_mmc.c
View File

@ -44,19 +44,43 @@ MODULE_DEVICE_TABLE(pci, pci_ids);
static int ricoh_mmc_disable(struct pci_dev *fw_dev)
{
u8 write_enable;
u8 write_target;
u8 disable;
pci_read_config_byte(fw_dev, 0xCB, &disable);
if (disable & 0x02) {
printk(KERN_INFO DRIVER_NAME
": Controller already disabled. Nothing to do.\n");
return -ENODEV;
}
if (fw_dev->device == PCI_DEVICE_ID_RICOH_RL5C476) {
/* via RL5C476 */
pci_read_config_byte(fw_dev, 0xCA, &write_enable);
pci_write_config_byte(fw_dev, 0xCA, 0x57);
pci_write_config_byte(fw_dev, 0xCB, disable | 0x02);
pci_write_config_byte(fw_dev, 0xCA, write_enable);
pci_read_config_byte(fw_dev, 0xB7, &disable);
if (disable & 0x02) {
printk(KERN_INFO DRIVER_NAME
": Controller already disabled. " \
"Nothing to do.\n");
return -ENODEV;
}
pci_read_config_byte(fw_dev, 0x8E, &write_enable);
pci_write_config_byte(fw_dev, 0x8E, 0xAA);
pci_read_config_byte(fw_dev, 0x8D, &write_target);
pci_write_config_byte(fw_dev, 0x8D, 0xB7);
pci_write_config_byte(fw_dev, 0xB7, disable | 0x02);
pci_write_config_byte(fw_dev, 0x8E, write_enable);
pci_write_config_byte(fw_dev, 0x8D, write_target);
} else {
/* via R5C832 */
pci_read_config_byte(fw_dev, 0xCB, &disable);
if (disable & 0x02) {
printk(KERN_INFO DRIVER_NAME
": Controller already disabled. " \
"Nothing to do.\n");
return -ENODEV;
}
pci_read_config_byte(fw_dev, 0xCA, &write_enable);
pci_write_config_byte(fw_dev, 0xCA, 0x57);
pci_write_config_byte(fw_dev, 0xCB, disable | 0x02);
pci_write_config_byte(fw_dev, 0xCA, write_enable);
}
printk(KERN_INFO DRIVER_NAME
": Controller is now disabled.\n");
@ -67,13 +91,29 @@ static int ricoh_mmc_disable(struct pci_dev *fw_dev)
static int ricoh_mmc_enable(struct pci_dev *fw_dev)
{
u8 write_enable;
u8 write_target;
u8 disable;
pci_read_config_byte(fw_dev, 0xCA, &write_enable);
pci_read_config_byte(fw_dev, 0xCB, &disable);
pci_write_config_byte(fw_dev, 0xCA, 0x57);
pci_write_config_byte(fw_dev, 0xCB, disable & ~0x02);
pci_write_config_byte(fw_dev, 0xCA, write_enable);
if (fw_dev->device == PCI_DEVICE_ID_RICOH_RL5C476) {
/* via RL5C476 */
pci_read_config_byte(fw_dev, 0x8E, &write_enable);
pci_write_config_byte(fw_dev, 0x8E, 0xAA);
pci_read_config_byte(fw_dev, 0x8D, &write_target);
pci_write_config_byte(fw_dev, 0x8D, 0xB7);
pci_read_config_byte(fw_dev, 0xB7, &disable);
pci_write_config_byte(fw_dev, 0xB7, disable & ~0x02);
pci_write_config_byte(fw_dev, 0x8E, write_enable);
pci_write_config_byte(fw_dev, 0x8D, write_target);
} else {
/* via R5C832 */
pci_read_config_byte(fw_dev, 0xCA, &write_enable);
pci_read_config_byte(fw_dev, 0xCB, &disable);
pci_write_config_byte(fw_dev, 0xCA, 0x57);
pci_write_config_byte(fw_dev, 0xCB, disable & ~0x02);
pci_write_config_byte(fw_dev, 0xCA, write_enable);
}
printk(KERN_INFO DRIVER_NAME
": Controller is now re-enabled.\n");
@ -85,6 +125,7 @@ static int __devinit ricoh_mmc_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
u8 rev;
u8 ctrlfound = 0;
struct pci_dev *fw_dev = NULL;
@ -98,20 +139,38 @@ static int __devinit ricoh_mmc_probe(struct pci_dev *pdev,
pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
(int)rev);
while ((fw_dev = pci_get_device(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, fw_dev))) {
while ((fw_dev =
pci_get_device(PCI_VENDOR_ID_RICOH,
PCI_DEVICE_ID_RICOH_RL5C476, fw_dev))) {
if (PCI_SLOT(pdev->devfn) == PCI_SLOT(fw_dev->devfn) &&
pdev->bus == fw_dev->bus) {
if (ricoh_mmc_disable(fw_dev) != 0) {
if (ricoh_mmc_disable(fw_dev) != 0)
return -ENODEV;
}
pci_set_drvdata(pdev, fw_dev);
++ctrlfound;
break;
}
}
if (pci_get_drvdata(pdev) == NULL) {
fw_dev = NULL;
while (!ctrlfound &&
(fw_dev = pci_get_device(PCI_VENDOR_ID_RICOH,
PCI_DEVICE_ID_RICOH_R5C832, fw_dev))) {
if (PCI_SLOT(pdev->devfn) == PCI_SLOT(fw_dev->devfn) &&
pdev->bus == fw_dev->bus) {
if (ricoh_mmc_disable(fw_dev) != 0)
return -ENODEV;
pci_set_drvdata(pdev, fw_dev);
++ctrlfound;
}
}
if (!ctrlfound) {
printk(KERN_WARNING DRIVER_NAME
": Main firewire function not found. Cannot disable controller.\n");
return -ENODEV;
@ -132,7 +191,7 @@ static void __devexit ricoh_mmc_remove(struct pci_dev *pdev)
pci_set_drvdata(pdev, NULL);
}
static int ricoh_mmc_suspend (struct pci_dev *pdev, pm_message_t state)
static int ricoh_mmc_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct pci_dev *fw_dev = NULL;
@ -146,7 +205,7 @@ static int ricoh_mmc_suspend (struct pci_dev *pdev, pm_message_t state)
return 0;
}
static int ricoh_mmc_resume (struct pci_dev *pdev)
static int ricoh_mmc_resume(struct pci_dev *pdev)
{
struct pci_dev *fw_dev = NULL;