sh: add init member to pci_channel data

This patch adds an init callback to struct pci_channel and makes sure
it is initialized properly. Code is added to call this init function
from pcibios_init(). Return values are adjusted and a warning is is
printed if init fails.

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

20 files changed, 56 insertions, 42 deletions

diff --git a/arch/sh/boards/mach-dreamcast/setup.c b/arch/sh/boards/mach-dreamcast/setup.c
index d1bee4884cd6..ebe99227d4e6 100644
--- a/arch/sh/boards/mach-dreamcast/setup.c
+++ b/arch/sh/boards/mach-dreamcast/setup.c
@@ -30,7 +30,6 @@
 
 extern struct irq_chip systemasic_int;
 extern void aica_time_init(void);
-extern int gapspci_init(void);
 extern int systemasic_irq_demux(int);
 
 static void __init dreamcast_setup(char **cmdline_p)
@@ -51,11 +50,6 @@ static void __init dreamcast_setup(char **cmdline_p)
                                          handle_level_irq);
 
         board_time_init = aica_time_init;
-
-#ifdef CONFIG_PCI
-        if (gapspci_init() < 0)
-                printk(KERN_WARNING "GAPSPCI was not detected.\n");
-#endif
 }
 
 static struct sh_machine_vector mv_dreamcast __initmv = {
diff --git a/arch/sh/drivers/pci/ops-cayman.c b/arch/sh/drivers/pci/ops-cayman.c
index 38ef76207af6..f4a5e14f7e5a 100644
--- a/arch/sh/drivers/pci/ops-cayman.c
+++ b/arch/sh/drivers/pci/ops-cayman.c
@@ -77,7 +77,7 @@ int __init pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin)
 }
 
 struct pci_channel board_pci_channels[] = {
-        { &sh5_pci_ops, NULL, NULL, 0, 0xff },
+        { sh5_pci_init, &sh5_pci_ops, NULL, NULL, 0, 0xff },
         { NULL, NULL, NULL, 0, 0 },
 };
 EXPORT_SYMBOL(board_pci_channels);
diff --git a/arch/sh/drivers/pci/ops-dreamcast.c b/arch/sh/drivers/pci/ops-dreamcast.c
index f5d2a2aa6f3f..f62063eb6490 100644
--- a/arch/sh/drivers/pci/ops-dreamcast.c
+++ b/arch/sh/drivers/pci/ops-dreamcast.c
@@ -42,15 +42,6 @@ static struct resource gapspci_mem_resource = {
         .flags  = IORESOURCE_MEM,
 };
 
-static struct pci_ops gapspci_pci_ops;
-
-struct pci_channel board_pci_channels[] = {
-        { &gapspci_pci_ops, &gapspci_io_resource,
-          &gapspci_mem_resource, 0, 1 },
-        { 0, }
-};
-EXPORT_SYMBOL(board_pci_channels);
-
 /*
  * The !gapspci_config_access case really shouldn't happen, ever, unless
  * someone implicitly messes around with the last devfn value.. otherwise we
@@ -116,7 +107,7 @@ static struct pci_ops gapspci_pci_ops = {
  * gapspci init
  */
 
-int __init gapspci_init(void)
+static int __init gapspci_init(struct pci_channel *chan)
 {
         char idbuf[16];
         int i;
@@ -168,3 +159,10 @@ char * __devinit pcibios_setup(char *str)
 {
         return str;
 }
+
+struct pci_channel board_pci_channels[] = {
+        { gapspci_init, &gapspci_pci_ops, &gapspci_io_resource,
+          &gapspci_mem_resource, 0, 1 },
+        { 0, }
+};
+EXPORT_SYMBOL(board_pci_channels);
diff --git a/arch/sh/drivers/pci/ops-landisk.c b/arch/sh/drivers/pci/ops-landisk.c
index 343c072a5a79..c46911d95eca 100644
--- a/arch/sh/drivers/pci/ops-landisk.c
+++ b/arch/sh/drivers/pci/ops-landisk.c
@@ -30,7 +30,7 @@ static struct resource sh7751_mem_resource = {
 };
 
 struct pci_channel board_pci_channels[] = {
-        {&sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0x3ff},
+        { sh7751_pci_init, &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0x3ff},
         {NULL, NULL, NULL, 0, 0},
 };
 
diff --git a/arch/sh/drivers/pci/ops-lboxre2.c b/arch/sh/drivers/pci/ops-lboxre2.c
index 8bff32a22101..f606df2195c1 100644
--- a/arch/sh/drivers/pci/ops-lboxre2.c
+++ b/arch/sh/drivers/pci/ops-lboxre2.c
@@ -39,7 +39,7 @@ static struct resource sh7751_mem_resource = {
 extern struct pci_ops sh7751_pci_ops;
 
 struct pci_channel board_pci_channels[] = {
-        { &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
+        { sh7751_pci_init, &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
         { NULL, NULL, NULL, 0, 0 },
 };
 
diff --git a/arch/sh/drivers/pci/ops-r7780rp.c b/arch/sh/drivers/pci/ops-r7780rp.c
index bf32ee8b1321..b51b7e4078d0 100644
--- a/arch/sh/drivers/pci/ops-r7780rp.c
+++ b/arch/sh/drivers/pci/ops-r7780rp.c
@@ -43,7 +43,7 @@ static struct resource sh7780_mem_resource = {
 extern struct pci_ops sh7780_pci_ops;
 
 struct pci_channel board_pci_channels[] = {
-        { &sh4_pci_ops, &sh7780_io_resource, &sh7780_mem_resource, 0, 0xff },
+        { sh7780_pci_init, &sh4_pci_ops, &sh7780_io_resource, &sh7780_mem_resource, 0, 0xff },
         { NULL, NULL, NULL, 0, 0 },
 };
 EXPORT_SYMBOL(board_pci_channels);
diff --git a/arch/sh/drivers/pci/ops-rts7751r2d.c b/arch/sh/drivers/pci/ops-rts7751r2d.c
index e4208a697321..fe5a231b8669 100644
--- a/arch/sh/drivers/pci/ops-rts7751r2d.c
+++ b/arch/sh/drivers/pci/ops-rts7751r2d.c
@@ -47,7 +47,7 @@ static struct resource sh7751_mem_resource = {
 extern struct pci_ops sh7751_pci_ops;
 
 struct pci_channel board_pci_channels[] = {
-        { &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
+        { sh7751_pci_init, &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
         { NULL, NULL, NULL, 0, 0 },
 };
 EXPORT_SYMBOL(board_pci_channels);
diff --git a/arch/sh/drivers/pci/ops-sdk7780.c b/arch/sh/drivers/pci/ops-sdk7780.c
index 21d59d4a2150..7277cd15ae6a 100644
--- a/arch/sh/drivers/pci/ops-sdk7780.c
+++ b/arch/sh/drivers/pci/ops-sdk7780.c
@@ -49,7 +49,7 @@ static struct resource sdk7780_mem_resource = {
 };
 
 struct pci_channel board_pci_channels[] = {
-        { &sh4_pci_ops, &sdk7780_io_resource, &sdk7780_mem_resource, 0, 0xff },
+        { sh7780_pci_init, &sh4_pci_ops, &sdk7780_io_resource, &sdk7780_mem_resource, 0, 0xff },
         { NULL, NULL, NULL, 0, 0 },
 };
 EXPORT_SYMBOL(board_pci_channels);
diff --git a/arch/sh/drivers/pci/ops-se7780.c b/arch/sh/drivers/pci/ops-se7780.c
index 78a6f2bc4f12..76a74fb42fb0 100644
--- a/arch/sh/drivers/pci/ops-se7780.c
+++ b/arch/sh/drivers/pci/ops-se7780.c
@@ -58,7 +58,7 @@ static struct resource se7780_mem_resource = {
 extern struct pci_ops se7780_pci_ops;
 
 struct pci_channel board_pci_channels[] = {
-        { &sh4_pci_ops, &se7780_io_resource, &se7780_mem_resource, 0, 0xff },
+        { sh7780_pci_init, &sh4_pci_ops, &se7780_io_resource, &se7780_mem_resource, 0, 0xff },
         { NULL, NULL, NULL, 0, 0 },
 };
 EXPORT_SYMBOL(board_pci_channels);
diff --git a/arch/sh/drivers/pci/ops-sh03.c b/arch/sh/drivers/pci/ops-sh03.c
index e1703ff5a4d2..0218135f0bb8 100644
--- a/arch/sh/drivers/pci/ops-sh03.c
+++ b/arch/sh/drivers/pci/ops-sh03.c
@@ -39,7 +39,7 @@ static struct resource sh7751_mem_resource = {
 extern struct pci_ops sh4_pci_ops;
 
 struct pci_channel board_pci_channels[] = {
-        { &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
+        { sh7751_pci_init, &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
         { NULL, NULL, NULL, 0, 0 },
 };
 
diff --git a/arch/sh/drivers/pci/ops-snapgear.c b/arch/sh/drivers/pci/ops-snapgear.c
index cba80153dde9..2e254c6cf6c1 100644
--- a/arch/sh/drivers/pci/ops-snapgear.c
+++ b/arch/sh/drivers/pci/ops-snapgear.c
@@ -40,7 +40,7 @@ static struct resource sh7751_mem_resource = {
 };
 
 struct pci_channel board_pci_channels[] = {
-        { &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
+        { sh7751_pci_init, &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
         { 0, }
 };
 
diff --git a/arch/sh/drivers/pci/ops-titan.c b/arch/sh/drivers/pci/ops-titan.c
index 69fcc5c5d520..ffa79bdf4755 100644
--- a/arch/sh/drivers/pci/ops-titan.c
+++ b/arch/sh/drivers/pci/ops-titan.c
@@ -52,7 +52,7 @@ static struct resource sh7751_mem_resource = {
 };
 
 struct pci_channel board_pci_channels[] = {
-        { &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
+        { sh7751_pci_init, &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
         { NULL, NULL, NULL, 0, 0 },
 };
 EXPORT_SYMBOL(board_pci_channels);
diff --git a/arch/sh/drivers/pci/pci-sh5.c b/arch/sh/drivers/pci/pci-sh5.c
index 7a97438762c8..008a02ec0d9f 100644
--- a/arch/sh/drivers/pci/pci-sh5.c
+++ b/arch/sh/drivers/pci/pci-sh5.c
@@ -27,6 +27,12 @@
 unsigned long pcicr_virt;
 unsigned long PCI_IO_AREA;
 
+int __init sh5_pci_init(struct pci_channel *chan)
+{
+        pr_debug("PCI: Starting intialization.\n");
+        return pcibios_init_platform();
+}
+
 /* Rounds a number UP to the nearest power of two. Used for
  * sizing the PCI window.
  */
diff --git a/arch/sh/drivers/pci/pci-sh5.h b/arch/sh/drivers/pci/pci-sh5.h
index 7cff3fc04d30..af09f384c7d2 100644
--- a/arch/sh/drivers/pci/pci-sh5.h
+++ b/arch/sh/drivers/pci/pci-sh5.h
@@ -108,6 +108,7 @@ extern unsigned long pcicr_virt;
 extern struct pci_ops sh5_pci_ops;
 
 /* arch/sh/drivers/pci/pci-sh5.c */
+int sh5_pci_init(struct pci_channel *chan);
 int sh5pci_init(unsigned long memStart, unsigned long memSize);
 
 #endif /* __PCI_SH5_H */
diff --git a/arch/sh/drivers/pci/pci-sh7751.c b/arch/sh/drivers/pci/pci-sh7751.c
index 9c2c01490d62..230db8bd9744 100644
--- a/arch/sh/drivers/pci/pci-sh7751.c
+++ b/arch/sh/drivers/pci/pci-sh7751.c
@@ -32,7 +32,7 @@
  * space mapping) will be called via the platform defined function
  * pcibios_init_platform().
  */
-static int __init sh7751_pci_init(void)
+int __init sh7751_pci_init(struct pci_channel *chan)
 {
         unsigned int id;
         int ret;
@@ -40,19 +40,18 @@ static int __init sh7751_pci_init(void)
         pr_debug("PCI: Starting intialization.\n");
 
         /* check for SH7751/SH7751R hardware */
-        id = pci_read_reg(NULL, SH7751_PCICONF0);
+        id = pci_read_reg(chan, 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(NULL)) != 0)
+        if ((ret = sh4_pci_check_direct(chan)) != 0)
                 return ret;
 
         return pcibios_init_platform();
 }
-subsys_initcall(sh7751_pci_init);
 
 static int __init __area_sdram_check(struct pci_channel *chan,
                                      unsigned int area)
@@ -178,7 +177,7 @@ int __init sh7751_pcic_init(struct pci_channel *chan,
         }
 
         if (!word)
-                return 0;
+                return -1;
 
         /* configure the wait control registers */
         word = ctrl_inl(SH7751_WCR1);
@@ -202,5 +201,5 @@ int __init sh7751_pcic_init(struct pci_channel *chan,
         word = SH4_PCICR_PREFIX | SH4_PCICR_CFIN | SH4_PCICR_ARBM;
         pci_write_reg(chan, word, SH4_PCICR);
 
-        return 1;
+        return 0;
 }
diff --git a/arch/sh/drivers/pci/pci-sh7751.h b/arch/sh/drivers/pci/pci-sh7751.h
index 6f101e5a6c83..0ea4387df136 100644
--- a/arch/sh/drivers/pci/pci-sh7751.h
+++ b/arch/sh/drivers/pci/pci-sh7751.h
@@ -130,6 +130,7 @@
 struct sh4_pci_address_map;
 
 /* arch/sh/drivers/pci/pci-sh7751.c */
+int sh7751_pci_init(struct pci_channel *chan);
 int sh7751_pcic_init(struct pci_channel *chan,
                      struct sh4_pci_address_map *map);
 
diff --git a/arch/sh/drivers/pci/pci-sh7780.c b/arch/sh/drivers/pci/pci-sh7780.c
index 56f673f66cb5..4706e880b087 100644
--- a/arch/sh/drivers/pci/pci-sh7780.c
+++ b/arch/sh/drivers/pci/pci-sh7780.c
@@ -45,7 +45,7 @@
  * space mapping) will be called via the platform defined function
  * pcibios_init_platform().
  */
-static int __init sh7780_pci_init(void)
+int __init sh7780_pci_init(struct pci_channel *chan)
 {
         unsigned int id;
         int ret, match = 0;
@@ -55,7 +55,7 @@ static int __init sh7780_pci_init(void)
         ctrl_outl(0x00000001, SH7780_PCI_VCR2); /* Enable PCIC */
 
         /* check for SH7780/SH7780R hardware */
-        id = pci_read_reg(NULL, SH7780_PCIVID);
+        id = pci_read_reg(chan, SH7780_PCIVID);
         if ((id & 0xffff) == SH7780_VENDOR_ID) {
                 switch ((id >> 16) & 0xffff) {
                 case SH7763_DEVICE_ID:
@@ -82,12 +82,11 @@ static int __init sh7780_pci_init(void)
                 ctrl_outl(0x33333333, INTC_INTPRI);
         }
 
-        if ((ret = sh4_pci_check_direct(NULL)) != 0)
+        if ((ret = sh4_pci_check_direct(chan)) != 0)
                 return ret;
 
         return pcibios_init_platform();
 }
-core_initcall(sh7780_pci_init);
 
 int __init sh7780_pcic_init(struct pci_channel *chan,
                             struct sh4_pci_address_map *map)
@@ -153,5 +152,5 @@ int __init sh7780_pcic_init(struct pci_channel *chan,
         word = SH4_PCICR_PREFIX | SH4_PCICR_CFIN | SH4_PCICR_FTO;
         pci_write_reg(chan, word, SH4_PCICR);
 
-        return 1;
+        return 0;
 }
diff --git a/arch/sh/drivers/pci/pci-sh7780.h b/arch/sh/drivers/pci/pci-sh7780.h
index d34961153d58..2f3c92065ec3 100644
--- a/arch/sh/drivers/pci/pci-sh7780.h
+++ b/arch/sh/drivers/pci/pci-sh7780.h
@@ -109,6 +109,7 @@
 struct sh4_pci_address_map;
 
 /* arch/sh/drivers/pci/pci-sh7780.c */
+int sh7780_pci_init(struct pci_channel *chan);
 int sh7780_pcic_init(struct pci_channel *chan,
                      struct sh4_pci_address_map *map);
 
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index 0d6ac7a1db49..29ec16e69afa 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -28,18 +28,31 @@ static int __init pcibios_init(void)
         struct pci_bus *bus;
         int busno;
 
+        /* init channels */
+        busno = 0;
+        for (p = board_pci_channels; p->init; p++) {
+                if (p->init(p) == 0)
+                        p->enabled = 1;
+                else
+                        pr_err("Unable to init pci channel %d\n", busno);
+                busno++;
+        }
+
 #ifdef CONFIG_PCI_AUTO
         /* assign resources */
         busno = 0;
-        for (p = board_pci_channels; p->pci_ops != NULL; p++)
-                busno = pciauto_assign_resources(busno, p) + 1;
+        for (p = board_pci_channels; p->init; p++)
+                if (p->enabled)
+                        busno = pciauto_assign_resources(busno, p) + 1;
 #endif
 
         /* scan the buses */
         busno = 0;
-        for (p = board_pci_channels; p->pci_ops != NULL; p++) {
-                bus = pci_scan_bus(busno, p->pci_ops, p);
-                busno = bus->subordinate + 1;
+        for (p = board_pci_channels; p->init; p++) {
+                if (p->enabled) {
+                        bus = pci_scan_bus(busno, p->pci_ops, p);
+                        busno = bus->subordinate + 1;
+                }
         }
 
         pci_fixup_irqs(pci_common_swizzle, pcibios_map_platform_irq);
diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h
index df1d383e18a5..5c7a8f1d2d54 100644
--- a/arch/sh/include/asm/pci.h
+++ b/arch/sh/include/asm/pci.h
@@ -17,11 +17,13 @@
  * external) PCI controllers.
  */
 struct pci_channel {
+        int (*init)(struct pci_channel *chan);
         struct pci_ops *pci_ops;
         struct resource *io_resource;
         struct resource *mem_resource;
         int first_devfn;
         int last_devfn;
+        int enabled;
 };
 
 /*