grub2/0387-grub-core-bus-usb-uhci.c-Fix-DMA-handling-and-enable.patch

From f94f8f792c37fe2abd7db8d6eaf70929580bf62f Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Mon, 29 Apr 2013 12:05:19 +0200
Subject: [PATCH 387/482] 	* grub-core/bus/usb/uhci.c: Fix DMA handling
 and enable on all PCI 	platforms.

---
 ChangeLog                   |  5 ++++
 grub-core/Makefile.core.def |  2 +-
 grub-core/bus/usb/uhci.c    | 70 ++++++++++++++++++++++++++++++++++-----------
 3 files changed, 59 insertions(+), 18 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 9dacb19..99a049a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2013-04-29  Vladimir Serbinenko  <phcoder@gmail.com>
 
+	* grub-core/bus/usb/uhci.c: Fix DMA handling and enable on all PCI
+	platforms.
+
+2013-04-29  Vladimir Serbinenko  <phcoder@gmail.com>
+
 	* grub-core/script/execute.c (grub_script_arglist_to_argv): Fix
 	handling of variables containing backslash.
 
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 2e73d89..dcb92ef 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -482,7 +482,7 @@ module = {
 module = {
   name = uhci;
   common = bus/usb/uhci.c;
-  enable = x86;
+  enable = pci;
 };
 
 module = {
diff --git a/grub-core/bus/usb/uhci.c b/grub-core/bus/usb/uhci.c
index 3639c42..a314637 100644
--- a/grub-core/bus/usb/uhci.c
+++ b/grub-core/bus/usb/uhci.c
@@ -26,6 +26,7 @@
 #include <grub/cpu/io.h>
 #include <grub/time.h>
 #include <grub/cpu/pci.h>
+#include <grub/disk.h>
 
 GRUB_MOD_LICENSE ("GPLv3+");
 
@@ -44,12 +45,22 @@ typedef enum
     GRUB_UHCI_REG_USBLEGSUP = 0xc0
   } grub_uhci_reg_t;
 
+enum
+  {
+    GRUB_UHCI_DETECT_CHANGED = (1 << 1),
+    GRUB_UHCI_DETECT_HAVE_DEVICE = 1,
+    GRUB_UHCI_DETECT_LOW_SPEED = (1 << 8)
+  };
+
 /* R/WC legacy support bits */
-#define GRUB_UHCI_LEGSUP_END_A20GATE (1 << 15)
-#define GRUB_UHCI_TRAP_BY_64H_WSTAT  (1 << 11)
-#define GRUB_UHCI_TRAP_BY_64H_RSTAT  (1 << 10)
-#define GRUB_UHCI_TRAP_BY_60H_WSTAT  (1 <<  9)
-#define GRUB_UHCI_TRAP_BY_60H_RSTAT  (1 <<  8)
+enum
+  {
+    GRUB_UHCI_LEGSUP_END_A20GATE = (1 << 15),
+    GRUB_UHCI_TRAP_BY_64H_WSTAT = (1 << 11),
+    GRUB_UHCI_TRAP_BY_64H_RSTAT = (1 << 10),
+    GRUB_UHCI_TRAP_BY_60H_WSTAT = (1 <<  9),
+    GRUB_UHCI_TRAP_BY_60H_RSTAT = (1 <<  8)
+  };
 
 /* Reset all legacy support - clear all R/WC bits and all R/W bits */
 #define GRUB_UHCI_RESET_LEGSUP_SMI ( GRUB_UHCI_LEGSUP_END_A20GATE \
@@ -125,7 +136,7 @@ typedef volatile struct grub_uhci_qh *grub_uhci_qh_t;
 
 struct grub_uhci
 {
-  int iobase;
+  grub_port_t iobase;
   volatile grub_uint32_t *framelist_virt;
   grub_uint32_t framelist_phys;
   struct grub_pci_dma_chunk *framelist_chunk;
@@ -213,22 +224,36 @@ grub_uhci_pci_iter (grub_pci_device_t dev,
 
   /* Set bus master - needed for coreboot or broken BIOSes */
   addr = grub_pci_make_address (dev, GRUB_PCI_REG_COMMAND);
-  grub_pci_write_word(addr,
-    GRUB_PCI_COMMAND_BUS_MASTER | grub_pci_read_word(addr));
+  grub_pci_write_word(addr, GRUB_PCI_COMMAND_IO_ENABLED
+		      | GRUB_PCI_COMMAND_BUS_MASTER
+		      | grub_pci_read_word (addr));
 
   /* Determine IO base address.  */
   addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG4);
   base = grub_pci_read (addr);
   /* Stop if there is no IO space base address defined.  */
-  if (! (base & 1))
+  if ((base & GRUB_PCI_ADDR_SPACE_MASK) != GRUB_PCI_ADDR_SPACE_IO)
     return 0;
 
+  if ((base & GRUB_UHCI_IOMASK) == 0)
+    {
+#if defined (GRUB_MACHINE_MIPS_LOONGSON) || defined (GRUB_MACHINE_QEMU)
+      static int ndevs = 0;
+      base = 0x1800 + ndevs++ * 0x100;
+      grub_pci_write (addr, base | GRUB_PCI_ADDR_SPACE_IO);
+#else
+      return 0;
+#endif
+    }
+
+  grub_dprintf ("uhci", "base = %x\n", base);
+
   /* Allocate memory for the controller and register it.  */
   u = grub_zalloc (sizeof (*u));
   if (! u)
     return 1;
 
-  u->iobase = base & GRUB_UHCI_IOMASK;
+  u->iobase = (base & GRUB_UHCI_IOMASK) + GRUB_MACHINE_PCI_IO_BASE;
 
   /* Reset PIRQ and SMI */
   addr = grub_pci_make_address (dev, GRUB_UHCI_REG_USBLEGSUP);       
@@ -392,6 +417,7 @@ grub_free_queue (struct grub_uhci *u, grub_uhci_qh_t qh, grub_uhci_td_t td,
     {
       grub_uhci_td_t tdprev;
 
+      grub_dprintf ("uhci", "Freeing %p\n", td);
       /* Check state of TD and possibly set last_trans */
       if (transfer && (td->linkptr & 1))
         transfer->last_trans = i;
@@ -400,7 +426,10 @@ grub_free_queue (struct grub_uhci *u, grub_uhci_qh_t qh, grub_uhci_td_t td,
       
       /* Unlink the queue.  */
       tdprev = td;
-      td = grub_dma_phys2virt (td->linkptr2, u->td_chunk);
+      if (!td->linkptr2)
+	td = 0;
+      else
+	td = grub_dma_phys2virt (td->linkptr2, u->td_chunk);
 
       /* Free the TD.  */
       grub_free_td (u, tdprev);
@@ -583,10 +612,17 @@ grub_uhci_check_transfer (grub_usb_controller_t dev,
 
   *actual = 0;
 
-  errtd = grub_dma_phys2virt (cdata->qh->elinkptr & ~0x0f, u->qh_chunk);
+  if (cdata->qh->elinkptr & ~0x0f)
+    errtd = grub_dma_phys2virt (cdata->qh->elinkptr & ~0x0f, u->qh_chunk);
+  else
+    errtd = 0;
   
-  grub_dprintf ("uhci", ">t status=0x%02x data=0x%02x td=%p\n",
-		errtd->ctrl_status, errtd->buffer & (~15), errtd);
+  if (errtd)
+    {
+      grub_dprintf ("uhci", ">t status=0x%02x data=0x%02x td=%p, %x\n",
+		    errtd->ctrl_status, errtd->buffer & (~15), errtd,
+		    cdata->qh->elinkptr);
+    }
 
   /* Check if the transaction completed.  */
   if (cdata->qh->elinkptr & 1)
@@ -788,7 +824,7 @@ grub_uhci_detect_dev (grub_usb_controller_t dev, int port, int *changed)
   grub_dprintf ("uhci", "detect=0x%02x port=%d\n", status, port);
 
   /* Connect Status Change bit - it detects change of connection */
-  if (status & (1 << 1))
+  if (status & GRUB_UHCI_DETECT_CHANGED)
     {
       *changed = 1;
       /* Reset bit Connect Status Change */
@@ -798,9 +834,9 @@ grub_uhci_detect_dev (grub_usb_controller_t dev, int port, int *changed)
   else
     *changed = 0;
     
-  if (! (status & 1))
+  if (! (status & GRUB_UHCI_DETECT_HAVE_DEVICE))
     return GRUB_USB_SPEED_NONE;
-  else if (status & (1 << 8))
+  else if (status & GRUB_UHCI_DETECT_LOW_SPEED)
     return GRUB_USB_SPEED_LOW;
   else
     return GRUB_USB_SPEED_FULL;
-- 
1.8.2.1