1 files changed, 147 insertions, 0 deletions

diff --git a/arch/sh/boards/mach-se/7751/pci.c b/arch/sh/boards/mach-se/7751/pci.c
new file mode 100644
index 000000000000..203b2923fe7f
--- /dev/null
+++ b/arch/sh/boards/mach-se/7751/pci.c
@@ -0,0 +1,147 @@
+/*
+ * linux/arch/sh/boards/se/7751/pci.c
+ *
+ * Author:  Ian DaSilva (idasilva@mvista.com)
+ *
+ * Highly leveraged from pci-bigsur.c, written by Dustin McIntire.
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.
+ *
+ * PCI initialization for the Hitachi SH7751 Solution Engine board (MS7751SE01)
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+
+#include <asm/io.h>
+#include "../../../drivers/pci/pci-sh7751.h"
+
+#define PCIMCR_MRSET_OFF        0xBFFFFFFF
+#define PCIMCR_RFSH_OFF         0xFFFFFFFB
+
+/*
+ * Only long word accesses of the PCIC's internal local registers and the
+ * configuration registers from the CPU is supported.
+ */
+#define PCIC_WRITE(x,v) writel((v), PCI_REG(x))
+#define PCIC_READ(x) readl(PCI_REG(x))
+
+/*
+ * Description:  This function sets up and initializes the pcic, sets
+ * up the BARS, maps the DRAM into the address space etc, etc.
+ */
+int __init pcibios_init_platform(void)
+{
+   unsigned long bcr1, wcr1, wcr2, wcr3, mcr;
+   unsigned short bcr2;
+
+   /*
+    * Initialize the slave bus controller on the pcic.  The values used
+    * here should not be hardcoded, but they should be taken from the bsc
+    * on the processor, to make this function as generic as possible.
+    * (i.e. Another sbc may usr different SDRAM timing settings -- in order
+    * for the pcic to work, its settings need to be exactly the same.)
+    */
+   bcr1 = (*(volatile unsigned long*)(SH7751_BCR1));
+   bcr2 = (*(volatile unsigned short*)(SH7751_BCR2));
+   wcr1 = (*(volatile unsigned long*)(SH7751_WCR1));
+   wcr2 = (*(volatile unsigned long*)(SH7751_WCR2));
+   wcr3 = (*(volatile unsigned long*)(SH7751_WCR3));
+   mcr = (*(volatile unsigned long*)(SH7751_MCR));
+
+   bcr1 = bcr1 | 0x00080000;  /* Enable Bit 19, BREQEN */
+   (*(volatile unsigned long*)(SH7751_BCR1)) = bcr1;   
+
+   bcr1 = bcr1 | 0x40080000;  /* Enable Bit 19 BREQEN, set PCIC to slave */
+   PCIC_WRITE(SH7751_PCIBCR1, bcr1);     /* PCIC BCR1 */
+   PCIC_WRITE(SH7751_PCIBCR2, bcr2);     /* PCIC BCR2 */
+   PCIC_WRITE(SH7751_PCIWCR1, wcr1);     /* PCIC WCR1 */
+   PCIC_WRITE(SH7751_PCIWCR2, wcr2);     /* PCIC WCR2 */
+   PCIC_WRITE(SH7751_PCIWCR3, wcr3);     /* PCIC WCR3 */
+   mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
+   PCIC_WRITE(SH7751_PCIMCR, mcr);      /* PCIC MCR */
+
+
+   /* Enable all interrupts, so we know what to fix */
+   PCIC_WRITE(SH7751_PCIINTM, 0x0000c3ff);
+   PCIC_WRITE(SH7751_PCIAINTM, 0x0000380f);
+
+   /* Set up standard PCI config registers */
+   PCIC_WRITE(SH7751_PCICONF1,  0xF39000C7); /* Bus Master, Mem & I/O access */
+   PCIC_WRITE(SH7751_PCICONF2,  0x00000000); /* PCI Class code & Revision ID */
+   PCIC_WRITE(SH7751_PCICONF4,  0xab000001); /* PCI I/O address (local regs) */
+   PCIC_WRITE(SH7751_PCICONF5,  0x0c000000); /* PCI MEM address (local RAM)  */
+   PCIC_WRITE(SH7751_PCICONF6,  0xd0000000); /* PCI MEM address (unused)     */
+   PCIC_WRITE(SH7751_PCICONF11, 0x35051054); /* PCI Subsystem ID & Vendor ID */
+   PCIC_WRITE(SH7751_PCILSR0, 0x03f00000);   /* MEM (full 64M exposed)       */
+   PCIC_WRITE(SH7751_PCILSR1, 0x00000000);   /* MEM (unused)                 */
+   PCIC_WRITE(SH7751_PCILAR0, 0x0c000000);   /* MEM (direct map from PCI)    */
+   PCIC_WRITE(SH7751_PCILAR1, 0x00000000);   /* MEM (unused)                 */
+
+   /* Now turn it on... */
+   PCIC_WRITE(SH7751_PCICR, 0xa5000001);
+
+   /*
+    * Set PCIMBR and PCIIOBR here, assuming a single window
+    * (16M MEM, 256K IO) is enough.  If a larger space is
+    * needed, the readx/writex and inx/outx functions will
+    * have to do more (e.g. setting registers for each call).
+    */
+
+   /*
+    * Set the MBR so PCI address is one-to-one with window,
+    * meaning all calls go straight through... use BUG_ON to
+    * catch erroneous assumption.
+    */
+   BUG_ON(PCIBIOS_MIN_MEM != SH7751_PCI_MEMORY_BASE);
+
+   PCIC_WRITE(SH7751_PCIMBR, PCIBIOS_MIN_MEM);
+
+   /* Set IOBR for window containing area specified in pci.h */
+   PCIC_WRITE(SH7751_PCIIOBR, (PCIBIOS_MIN_IO & SH7751_PCIIOBR_MASK));
+
+   /* All done, may as well say so... */
+   printk("SH7751 PCI: Finished initialization of the PCI controller\n");
+
+   return 1;
+}
+
+int __init pcibios_map_platform_irq(u8 slot, u8 pin)
+{
+        switch (slot) {
+        case 0: return 13;
+        case 1: return 13;      /* AMD Ethernet controller */
+        case 2: return -1;
+        case 3: return -1;
+        case 4: return -1;
+        default:
+                printk("PCI: Bad IRQ mapping request for slot %d\n", slot);
+                return -1;
+        }
+}
+
+static struct resource sh7751_io_resource = {
+        .name   = "SH7751 IO",
+        .start  = SH7751_PCI_IO_BASE,
+        .end    = SH7751_PCI_IO_BASE + SH7751_PCI_IO_SIZE - 1,
+        .flags  = IORESOURCE_IO
+};
+
+static struct resource sh7751_mem_resource = {
+        .name   = "SH7751 mem",
+        .start  = SH7751_PCI_MEMORY_BASE,
+        .end    = SH7751_PCI_MEMORY_BASE + SH7751_PCI_MEM_SIZE - 1,
+        .flags  = IORESOURCE_MEM
+};
+
+extern struct pci_ops sh7751_pci_ops;
+
+struct pci_channel board_pci_channels[] = {
+        { &sh7751_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
+        { NULL, NULL, NULL, 0, 0 },
+};
+