1 files changed, 81 insertions, 27 deletions

diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index 7ebad3c14cb8..996d61f0d460 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -33,6 +33,10 @@
 #include <asm/page.h>
 #include <asm/system.h>
 
+#ifdef CONFIG_PPC_PMAC
+#include <asm/pmac_feature.h>
+#endif
+
 #include "fw-ohci.h"
 #include "fw-transaction.h"
 
@@ -175,6 +179,7 @@ struct fw_ohci {
         int generation;
         int request_generation;
         u32 bus_seconds;
+        bool old_uninorth;
 
         /*
          * Spinlock for accessing fw_ohci data.  Never call out of
@@ -276,19 +281,13 @@ static int ar_context_add_page(struct ar_context *ctx)
 {
         struct device *dev = ctx->ohci->card.device;
         struct ar_buffer *ab;
-        dma_addr_t ab_bus;
+        dma_addr_t uninitialized_var(ab_bus);
         size_t offset;
 
-        ab = (struct ar_buffer *) __get_free_page(GFP_ATOMIC);
+        ab = dma_alloc_coherent(dev, PAGE_SIZE, &ab_bus, GFP_ATOMIC);
         if (ab == NULL)
                 return -ENOMEM;
 
-        ab_bus = dma_map_single(dev, ab, PAGE_SIZE, DMA_BIDIRECTIONAL);
-        if (dma_mapping_error(ab_bus)) {
-                free_page((unsigned long) ab);
-                return -ENOMEM;
-        }
-
         memset(&ab->descriptor, 0, sizeof(ab->descriptor));
         ab->descriptor.control        = cpu_to_le16(DESCRIPTOR_INPUT_MORE |
                                                     DESCRIPTOR_STATUS |
@@ -299,8 +298,6 @@ static int ar_context_add_page(struct ar_context *ctx)
         ab->descriptor.res_count      = cpu_to_le16(PAGE_SIZE - offset);
         ab->descriptor.branch_address = 0;
 
-        dma_sync_single_for_device(dev, ab_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
-
         ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1);
         ctx->last_buffer->next = ab;
         ctx->last_buffer = ab;
@@ -311,15 +308,22 @@ static int ar_context_add_page(struct ar_context *ctx)
         return 0;
 }
 
+#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
+#define cond_le32_to_cpu(v) \
+        (ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v))
+#else
+#define cond_le32_to_cpu(v) le32_to_cpu(v)
+#endif
+
 static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
 {
         struct fw_ohci *ohci = ctx->ohci;
         struct fw_packet p;
         u32 status, length, tcode;
 
-        p.header[0] = le32_to_cpu(buffer[0]);
-        p.header[1] = le32_to_cpu(buffer[1]);
-        p.header[2] = le32_to_cpu(buffer[2]);
+        p.header[0] = cond_le32_to_cpu(buffer[0]);
+        p.header[1] = cond_le32_to_cpu(buffer[1]);
+        p.header[2] = cond_le32_to_cpu(buffer[2]);
 
         tcode = (p.header[0] >> 4) & 0x0f;
         switch (tcode) {
@@ -331,7 +335,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
                 break;
 
         case TCODE_READ_BLOCK_REQUEST :
-                p.header[3] = le32_to_cpu(buffer[3]);
+                p.header[3] = cond_le32_to_cpu(buffer[3]);
                 p.header_length = 16;
                 p.payload_length = 0;
                 break;
@@ -340,7 +344,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
         case TCODE_READ_BLOCK_RESPONSE:
         case TCODE_LOCK_REQUEST:
         case TCODE_LOCK_RESPONSE:
-                p.header[3] = le32_to_cpu(buffer[3]);
+                p.header[3] = cond_le32_to_cpu(buffer[3]);
                 p.header_length = 16;
                 p.payload_length = p.header[3] >> 16;
                 break;
@@ -357,7 +361,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
 
         /* FIXME: What to do about evt_* errors? */
         length = (p.header_length + p.payload_length + 3) / 4;
-        status = le32_to_cpu(buffer[length]);
+        status = cond_le32_to_cpu(buffer[length]);
 
         p.ack        = ((status >> 16) & 0x1f) - 16;
         p.speed      = (status >> 21) & 0x7;
@@ -375,7 +379,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
          */
 
         if (p.ack + 16 == 0x09)
-                ohci->request_generation = (buffer[2] >> 16) & 0xff;
+                ohci->request_generation = (p.header[2] >> 16) & 0xff;
         else if (ctx == &ohci->ar_request_ctx)
                 fw_core_handle_request(&ohci->card, &p);
         else
@@ -397,6 +401,7 @@ static void ar_context_tasklet(unsigned long data)
 
         if (d->res_count == 0) {
                 size_t size, rest, offset;
+                dma_addr_t buffer_bus;
 
                 /*
                  * This descriptor is finished and we may have a
@@ -405,9 +410,7 @@ static void ar_context_tasklet(unsigned long data)
                  */
 
                 offset = offsetof(struct ar_buffer, data);
-                dma_unmap_single(ohci->card.device,
-                        le32_to_cpu(ab->descriptor.data_address) - offset,
-                        PAGE_SIZE, DMA_BIDIRECTIONAL);
+                buffer_bus = le32_to_cpu(ab->descriptor.data_address) - offset;
 
                 buffer = ab;
                 ab = ab->next;
@@ -423,7 +426,8 @@ static void ar_context_tasklet(unsigned long data)
                 while (buffer < end)
                         buffer = handle_ar_packet(ctx, buffer);
 
-                free_page((unsigned long)buffer);
+                dma_free_coherent(ohci->card.device, PAGE_SIZE,
+                                  buffer, buffer_bus);
                 ar_context_add_page(ctx);
         } else {
                 buffer = ctx->pointer;
@@ -532,7 +536,7 @@ static int
 context_add_buffer(struct context *ctx)
 {
         struct descriptor_buffer *desc;
-        dma_addr_t bus_addr;
+        dma_addr_t uninitialized_var(bus_addr);
         int offset;
 
         /*
@@ -1022,13 +1026,14 @@ static void bus_reset_tasklet(unsigned long data)
          */
 
         self_id_count = (reg_read(ohci, OHCI1394_SelfIDCount) >> 3) & 0x3ff;
-        generation = (le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff;
+        generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff;
         rmb();
 
         for (i = 1, j = 0; j < self_id_count; i += 2, j++) {
                 if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1])
                         fw_error("inconsistent self IDs\n");
-                ohci->self_id_buffer[j] = le32_to_cpu(ohci->self_id_cpu[i]);
+                ohci->self_id_buffer[j] =
+                                cond_le32_to_cpu(ohci->self_id_cpu[i]);
         }
         rmb();
 
@@ -1316,7 +1321,7 @@ ohci_set_config_rom(struct fw_card *card, u32 *config_rom, size_t length)
         unsigned long flags;
         int retval = -EBUSY;
         __be32 *next_config_rom;
-        dma_addr_t next_config_rom_bus;
+        dma_addr_t uninitialized_var(next_config_rom_bus);
 
         ohci = fw_ohci(card);
 
@@ -1487,7 +1492,7 @@ static int handle_ir_dualbuffer_packet(struct context *context,
         void *p, *end;
         int i;
 
-        if (db->first_res_count > 0 && db->second_res_count > 0) {
+        if (db->first_res_count != 0 && db->second_res_count != 0) {
                 if (ctx->excess_bytes <= le16_to_cpu(db->second_req_count)) {
                         /* This descriptor isn't done yet, stop iteration. */
                         return 0;
@@ -1513,7 +1518,7 @@ static int handle_ir_dualbuffer_packet(struct context *context,
                 memcpy(ctx->header + i + 4, p + 8, ctx->base.header_size - 4);
                 i += ctx->base.header_size;
                 ctx->excess_bytes +=
-                        (le32_to_cpu(*(u32 *)(p + 4)) >> 16) & 0xffff;
+                        (le32_to_cpu(*(__le32 *)(p + 4)) >> 16) & 0xffff;
                 p += ctx->base.header_size + 4;
         }
         ctx->header_length = i;
@@ -2048,6 +2053,18 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
         int err;
         size_t size;
 
+#ifdef CONFIG_PPC_PMAC
+        /* Necessary on some machines if fw-ohci was loaded/ unloaded before */
+        if (machine_is(powermac)) {
+                struct device_node *ofn = pci_device_to_OF_node(dev);
+
+                if (ofn) {
+                        pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1);
+                        pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
+                }
+        }
+#endif /* CONFIG_PPC_PMAC */
+
         ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
         if (ohci == NULL) {
                 fw_error("Could not malloc fw_ohci data.\n");
@@ -2066,6 +2083,10 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
         pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0);
         pci_set_drvdata(dev, ohci);
 
+#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
+        ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
+                             dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
+#endif
         spin_lock_init(&ohci->lock);
 
         tasklet_init(&ohci->bus_reset_tasklet,
@@ -2182,6 +2203,19 @@ static void pci_remove(struct pci_dev *dev)
         pci_disable_device(dev);
         fw_card_put(&ohci->card);
 
+#ifdef CONFIG_PPC_PMAC
+        /* On UniNorth, power down the cable and turn off the chip clock
+         * to save power on laptops */
+        if (machine_is(powermac)) {
+                struct device_node *ofn = pci_device_to_OF_node(dev);
+
+                if (ofn) {
+                        pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
+                        pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0);
+                }
+        }
+#endif /* CONFIG_PPC_PMAC */
+
         fw_notify("Removed fw-ohci device.\n");
 }
 
@@ -2202,6 +2236,16 @@ static int pci_suspend(struct pci_dev *pdev, pm_message_t state)
         if (err)
                 fw_error("pci_set_power_state failed with %d\n", err);
 
+/* PowerMac suspend code comes last */
+#ifdef CONFIG_PPC_PMAC
+        if (machine_is(powermac)) {
+                struct device_node *ofn = pci_device_to_OF_node(pdev);
+
+                if (ofn)
+                        pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
+        }
+#endif /* CONFIG_PPC_PMAC */
+
         return 0;
 }
 
@@ -2210,6 +2254,16 @@ static int pci_resume(struct pci_dev *pdev)
         struct fw_ohci *ohci = pci_get_drvdata(pdev);
         int err;
 
+/* PowerMac resume code comes first */
+#ifdef CONFIG_PPC_PMAC
+        if (machine_is(powermac)) {
+                struct device_node *ofn = pci_device_to_OF_node(pdev);
+
+                if (ofn)
+                        pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
+        }
+#endif /* CONFIG_PPC_PMAC */
+
         pci_set_power_state(pdev, PCI_D0);
         pci_restore_state(pdev);
         err = pci_enable_device(pdev);