sh: pass along struct pci_channel

These patches rework the pci code for the sh architecture.

Currently each board implements some kind of ioport to address mapping.
Some boards use generic_io_base others try passing addresses as io ports.
This is the first set of patches that try to unify the pci code as much
as possible to avoid duplicated code. This will in the end lead to fewer
lines board specific code and more generic code.

This patch makes sure a struct pci_channel pointer is passed along to
various pci functions such as pci_read_reg(), pci_write_reg(),
pci_fixup_pcic(), sh7751_pcic_init() and sh7780_pcic_init().

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 35 insertions, 33 deletions

diff --git a/arch/sh/drivers/pci/pci-sh7751.c b/arch/sh/drivers/pci/pci-sh7751.c
index 3065eb184f01..9c2c01490d62 100644
--- a/arch/sh/drivers/pci/pci-sh7751.c
+++ b/arch/sh/drivers/pci/pci-sh7751.c
@@ -40,21 +40,22 @@ static int __init sh7751_pci_init(void)
         pr_debug("PCI: Starting intialization.\n");
 
         /* check for SH7751/SH7751R hardware */
-        id = pci_read_reg(SH7751_PCICONF0);
+        id = pci_read_reg(NULL, SH7751_PCICONF0);
         if (id != ((SH7751_DEVICE_ID << 16) | SH7751_VENDOR_ID) &&
             id != ((SH7751R_DEVICE_ID << 16) | SH7751_VENDOR_ID)) {
                 pr_debug("PCI: This is not an SH7751(R) (%x)\n", id);
                 return -ENODEV;
         }
 
-        if ((ret = sh4_pci_check_direct()) != 0)
+        if ((ret = sh4_pci_check_direct(NULL)) != 0)
                 return ret;
 
         return pcibios_init_platform();
 }
 subsys_initcall(sh7751_pci_init);
 
-static int __init __area_sdram_check(unsigned int area)
+static int __init __area_sdram_check(struct pci_channel *chan,
+                                     unsigned int area)
 {
         u32 word;
 
@@ -65,7 +66,7 @@ static int __init __area_sdram_check(unsigned int area)
                        area, word);
                 return 0;
         }
-        pci_write_reg(word, SH4_PCIBCR1);
+        pci_write_reg(chan, word, SH4_PCIBCR1);
 
         word = (u16)ctrl_inw(SH7751_BCR2);
         /* check BCR2 for 32bit SDRAM interface*/
@@ -74,12 +75,13 @@ static int __init __area_sdram_check(unsigned int area)
                        area, word);
                 return 0;
         }
-        pci_write_reg(word, SH4_PCIBCR2);
+        pci_write_reg(chan, word, SH4_PCIBCR2);
 
         return 1;
 }
 
-int __init sh7751_pcic_init(struct sh4_pci_address_map *map)
+int __init sh7751_pcic_init(struct pci_channel *chan,
+                            struct sh4_pci_address_map *map)
 {
         u32 reg;
         u32 word;
@@ -90,10 +92,10 @@ int __init sh7751_pcic_init(struct sh4_pci_address_map *map)
         ctrl_outl(reg, SH7751_BCR1);
 
         /* Turn the clocks back on (not done in reset)*/
-        pci_write_reg(0, SH4_PCICLKR);
+        pci_write_reg(chan, 0, SH4_PCICLKR);
         /* Clear Powerdown IRQ's (not done in reset) */
         word = SH4_PCIPINT_D3 | SH4_PCIPINT_D0;
-        pci_write_reg(word, SH4_PCIPINT);
+        pci_write_reg(chan, word, SH4_PCIPINT);
 
         /*
          * This code is unused for some boards as it is done in the
@@ -103,11 +105,11 @@ int __init sh7751_pcic_init(struct sh4_pci_address_map *map)
         if (!(map->flags & SH4_PCIC_NO_RESET)) {
                 /* toggle PCI reset pin */
                 word = SH4_PCICR_PREFIX | SH4_PCICR_PRST;
-                pci_write_reg(word, SH4_PCICR);
+                pci_write_reg(chan, word, SH4_PCICR);
                 /* Wait for a long time... not 1 sec. but long enough */
                 mdelay(100);
                 word = SH4_PCICR_PREFIX;
-                pci_write_reg(word, SH4_PCICR);
+                pci_write_reg(chan, word, SH4_PCICR);
         }
 
         /* set the command/status bits to:
@@ -116,11 +118,11 @@ int __init sh7751_pcic_init(struct sh4_pci_address_map *map)
          */
         word = SH7751_PCICONF1_WCC | SH7751_PCICONF1_PER |
                SH7751_PCICONF1_BUM | SH7751_PCICONF1_MES;
-        pci_write_reg(word, SH7751_PCICONF1);
+        pci_write_reg(chan, word, SH7751_PCICONF1);
 
         /* define this host as the host bridge */
         word = PCI_BASE_CLASS_BRIDGE << 24;
-        pci_write_reg(word, SH7751_PCICONF2);
+        pci_write_reg(chan, word, SH7751_PCICONF2);
 
         /* Set IO and Mem windows to local address
          * Make PCI and local address the same for easy 1 to 1 mapping
@@ -128,24 +130,24 @@ int __init sh7751_pcic_init(struct sh4_pci_address_map *map)
          * Window1 = map->window1.size @ cached area base = SDRAM
          */
         word = map->window0.size - 1;
-        pci_write_reg(word, SH4_PCILSR0);
+        pci_write_reg(chan, word, SH4_PCILSR0);
         word = map->window1.size - 1;
-        pci_write_reg(word, SH4_PCILSR1);
+        pci_write_reg(chan, word, SH4_PCILSR1);
         /* Set the values on window 0 PCI config registers */
         word = P2SEGADDR(map->window0.base);
-        pci_write_reg(word, SH4_PCILAR0);
-        pci_write_reg(word, SH7751_PCICONF5);
+        pci_write_reg(chan, word, SH4_PCILAR0);
+        pci_write_reg(chan, word, SH7751_PCICONF5);
         /* Set the values on window 1 PCI config registers */
         word =  PHYSADDR(map->window1.base);
-        pci_write_reg(word, SH4_PCILAR1);
-        pci_write_reg(word, SH7751_PCICONF6);
+        pci_write_reg(chan, word, SH4_PCILAR1);
+        pci_write_reg(chan, word, SH7751_PCICONF6);
 
         /* Set the local 16MB PCI memory space window to
          * the lowest PCI mapped address
          */
         word = PCIBIOS_MIN_MEM & SH4_PCIMBR_MASK;
         pr_debug("PCI: Setting upper bits of Memory window to 0x%x\n", word);
-        pci_write_reg(word , SH4_PCIMBR);
+        pci_write_reg(chan, word , SH4_PCIMBR);
 
         /* Map IO space into PCI IO window
          * The IO window is 64K-PCIBIOS_MIN_IO in size
@@ -160,19 +162,19 @@ int __init sh7751_pcic_init(struct sh4_pci_address_map *map)
          * correctly */
         word = PCIBIOS_MIN_IO & SH4_PCIIOBR_MASK;
         pr_debug("PCI: Setting upper bits of IO window to 0x%x\n", word);
-        pci_write_reg(word, SH4_PCIIOBR);
+        pci_write_reg(chan, word, SH4_PCIIOBR);
 
         /* Set PCI WCRx, BCRx's, copy from BSC locations */
 
         /* check BCR for SDRAM in specified area */
         switch (map->window0.base) {
-        case SH7751_CS0_BASE_ADDR: word = __area_sdram_check(0); break;
-        case SH7751_CS1_BASE_ADDR: word = __area_sdram_check(1); break;
-        case SH7751_CS2_BASE_ADDR: word = __area_sdram_check(2); break;
-        case SH7751_CS3_BASE_ADDR: word = __area_sdram_check(3); break;
-        case SH7751_CS4_BASE_ADDR: word = __area_sdram_check(4); break;
-        case SH7751_CS5_BASE_ADDR: word = __area_sdram_check(5); break;
-        case SH7751_CS6_BASE_ADDR: word = __area_sdram_check(6); break;
+        case SH7751_CS0_BASE_ADDR: word = __area_sdram_check(chan, 0); break;
+        case SH7751_CS1_BASE_ADDR: word = __area_sdram_check(chan, 1); break;
+        case SH7751_CS2_BASE_ADDR: word = __area_sdram_check(chan, 2); break;
+        case SH7751_CS3_BASE_ADDR: word = __area_sdram_check(chan, 3); break;
+        case SH7751_CS4_BASE_ADDR: word = __area_sdram_check(chan, 4); break;
+        case SH7751_CS5_BASE_ADDR: word = __area_sdram_check(chan, 5); break;
+        case SH7751_CS6_BASE_ADDR: word = __area_sdram_check(chan, 6); break;
         }
 
         if (!word)
@@ -180,25 +182,25 @@ int __init sh7751_pcic_init(struct sh4_pci_address_map *map)
 
         /* configure the wait control registers */
         word = ctrl_inl(SH7751_WCR1);
-        pci_write_reg(word, SH4_PCIWCR1);
+        pci_write_reg(chan, word, SH4_PCIWCR1);
         word = ctrl_inl(SH7751_WCR2);
-        pci_write_reg(word, SH4_PCIWCR2);
+        pci_write_reg(chan, word, SH4_PCIWCR2);
         word = ctrl_inl(SH7751_WCR3);
-        pci_write_reg(word, SH4_PCIWCR3);
+        pci_write_reg(chan, word, SH4_PCIWCR3);
         word = ctrl_inl(SH7751_MCR);
-        pci_write_reg(word, SH4_PCIMCR);
+        pci_write_reg(chan, word, SH4_PCIMCR);
 
         /* NOTE: I'm ignoring the PCI error IRQs for now..
          * TODO: add support for the internal error interrupts and
          * DMA interrupts...
          */
 
-        pci_fixup_pcic();
+        pci_fixup_pcic(chan);
 
         /* SH7751 init done, set central function init complete */
         /* use round robin mode to stop a device starving/overruning */
         word = SH4_PCICR_PREFIX | SH4_PCICR_CFIN | SH4_PCICR_ARBM;
-        pci_write_reg(word, SH4_PCICR);
+        pci_write_reg(chan, word, SH4_PCICR);
 
         return 1;
 }