sh: sh7785lcr: Map whole PCI address space.

PCI still doesn't work on sh7785lcr 29bit 256M map mode.

On SH7785, PCI -> SHwy address translation is not base+offset but
somewhat like base|offset (See HW Manual (rej09b0261) Fig. 13.11).
So, you can't export CS2,3,4,5 by 256M at CS2 (results CS0,1,2,3
exported, I guess).  There are two candidates.

a) 128M@CS2 + 128M@CS4
b) 512M@CS0

Attached patch is B. It maps 512M Byte at 0 independently of memory
size. It results CS0 to CS6 and perhaps some more being accessible
from PCI.

Tested on
7785lcr 29bit 128M map
7785lcr 29bit 256M map
(NOT tested on 32bit)
Signed-off-by: Takashi YOSHII <yoshii.takashi@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/drivers/pci/ops-sh7785lcr.c

@@ -48,13 +48,8 @@ EXPORT_SYMBOL(board_pci_channels);
 
 static struct sh4_pci_address_map sh7785_pci_map = {
 	.window0	= {
-		.base	= SH7780_CS2_BASE_ADDR,
-		.size	= 0x04000000,
-	},
-
-	.window1	= {
-		.base	= SH7780_CS3_BASE_ADDR,
-		.size	= 0x04000000,
+		.base	= SH7780_CS0_BASE_ADDR,
+		.size	= 0x20000000,
 	},
 
 	.flags	= SH4_PCIC_NO_RESET,

arch/sh/drivers/pci/pci-sh7780.c

@@ -120,19 +120,15 @@ int __init sh7780_pcic_init(struct sh4_pci_address_map *map)
 
 	/* Set IO and Mem windows to local address
 	 * Make PCI and local address the same for easy 1 to 1 mapping
-	 * Window0 = map->window0.size @ non-cached area base = SDRAM
-	 * Window1 = map->window1.size @ cached area base = SDRAM
 	 */
-	word = (CONFIG_MEMORY_SIZE - 0x00100000) | 0x00000001;
-	pci_write_reg(word, SH4_PCILSR0);
-	pci_write_reg(0x00000001, SH4_PCILSR1);
+	pci_write_reg(map->window0.size - 0xfffff, SH4_PCILSR0);
+	pci_write_reg(map->window1.size - 0xfffff, SH4_PCILSR1);
 	/* Set the values on window 0 PCI config registers */
-	word = CONFIG_MEMORY_START | (CONFIG_MEMORY_SIZE - 0x01000000);
-	pci_write_reg(word, SH4_PCILAR0);
-	pci_write_reg(word, SH7780_PCIMBAR0);
+	pci_write_reg(map->window0.base, SH4_PCILAR0);
+	pci_write_reg(map->window0.base, SH7780_PCIMBAR0);
 	/* Set the values on window 1 PCI config registers */
-	pci_write_reg(0x00000000, SH4_PCILAR1);
-	pci_write_reg(0x00000000, SH7780_PCIMBAR1);
+	pci_write_reg(map->window1.base, SH4_PCILAR1);
+	pci_write_reg(map->window1.base, SH7780_PCIMBAR1);
 
 	/* Map IO space into PCI IO window
 	 * The IO window is 64K-PCIBIOS_MIN_IO in size