mmc: extend ricoh_mmc to support Ricoh RL5c476
Frank Seidel [Mon, 4 Feb 2008 18:25:42 +0000 (19:25 +0100)]
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>

drivers/mmc/host/ricoh_mmc.c

index 898e799..a16d760 100644 (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;