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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/sh/drivers/superhyway
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/sh/drivers/superhyway')
-rw-r--r--kernel/arch/sh/drivers/superhyway/Makefile6
-rw-r--r--kernel/arch/sh/drivers/superhyway/ops-sh4-202.c171
2 files changed, 177 insertions, 0 deletions
diff --git a/kernel/arch/sh/drivers/superhyway/Makefile b/kernel/arch/sh/drivers/superhyway/Makefile
new file mode 100644
index 000000000..5b8e0c7ca
--- /dev/null
+++ b/kernel/arch/sh/drivers/superhyway/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the SuperHyway specific kernel interface routines under Linux.
+#
+
+obj-$(CONFIG_CPU_SUBTYPE_SH4_202) += ops-sh4-202.o
+
diff --git a/kernel/arch/sh/drivers/superhyway/ops-sh4-202.c b/kernel/arch/sh/drivers/superhyway/ops-sh4-202.c
new file mode 100644
index 000000000..6da62e947
--- /dev/null
+++ b/kernel/arch/sh/drivers/superhyway/ops-sh4-202.c
@@ -0,0 +1,171 @@
+/*
+ * arch/sh/drivers/superhyway/ops-sh4-202.c
+ *
+ * SuperHyway bus support for SH4-202
+ *
+ * Copyright (C) 2005 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU
+ * General Public License. See the file "COPYING" in the main
+ * directory of this archive for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/superhyway.h>
+#include <linux/string.h>
+#include <asm/addrspace.h>
+#include <asm/io.h>
+
+#define PHYS_EMI_CBLOCK P4SEGADDR(0x1ec00000)
+#define PHYS_EMI_DBLOCK P4SEGADDR(0x08000000)
+#define PHYS_FEMI_CBLOCK P4SEGADDR(0x1f800000)
+#define PHYS_FEMI_DBLOCK P4SEGADDR(0x00000000)
+
+#define PHYS_EPBR_BLOCK P4SEGADDR(0x1de00000)
+#define PHYS_DMAC_BLOCK P4SEGADDR(0x1fa00000)
+#define PHYS_PBR_BLOCK P4SEGADDR(0x1fc00000)
+
+static struct resource emi_resources[] = {
+ [0] = {
+ .start = PHYS_EMI_CBLOCK,
+ .end = PHYS_EMI_CBLOCK + 0x00300000 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = PHYS_EMI_DBLOCK,
+ .end = PHYS_EMI_DBLOCK + 0x08000000 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct superhyway_device emi_device = {
+ .name = "emi",
+ .num_resources = ARRAY_SIZE(emi_resources),
+ .resource = emi_resources,
+};
+
+static struct resource femi_resources[] = {
+ [0] = {
+ .start = PHYS_FEMI_CBLOCK,
+ .end = PHYS_FEMI_CBLOCK + 0x00100000 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = PHYS_FEMI_DBLOCK,
+ .end = PHYS_FEMI_DBLOCK + 0x08000000 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct superhyway_device femi_device = {
+ .name = "femi",
+ .num_resources = ARRAY_SIZE(femi_resources),
+ .resource = femi_resources,
+};
+
+static struct resource epbr_resources[] = {
+ [0] = {
+ .start = P4SEGADDR(0x1e7ffff8),
+ .end = P4SEGADDR(0x1e7ffff8 + (sizeof(u32) * 2) - 1),
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = PHYS_EPBR_BLOCK,
+ .end = PHYS_EPBR_BLOCK + 0x00a00000 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct superhyway_device epbr_device = {
+ .name = "epbr",
+ .num_resources = ARRAY_SIZE(epbr_resources),
+ .resource = epbr_resources,
+};
+
+static struct resource dmac_resource = {
+ .start = PHYS_DMAC_BLOCK,
+ .end = PHYS_DMAC_BLOCK + 0x00100000 - 1,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct superhyway_device dmac_device = {
+ .name = "dmac",
+ .num_resources = 1,
+ .resource = &dmac_resource,
+};
+
+static struct resource pbr_resources[] = {
+ [0] = {
+ .start = P4SEGADDR(0x1ffffff8),
+ .end = P4SEGADDR(0x1ffffff8 + (sizeof(u32) * 2) - 1),
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = PHYS_PBR_BLOCK,
+ .end = PHYS_PBR_BLOCK + 0x00400000 - (sizeof(u32) * 2) - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct superhyway_device pbr_device = {
+ .name = "pbr",
+ .num_resources = ARRAY_SIZE(pbr_resources),
+ .resource = pbr_resources,
+};
+
+static struct superhyway_device *sh4202_devices[] __initdata = {
+ &emi_device, &femi_device, &epbr_device, &dmac_device, &pbr_device,
+};
+
+static int sh4202_read_vcr(unsigned long base, struct superhyway_vcr_info *vcr)
+{
+ u32 vcrh, vcrl;
+ u64 tmp;
+
+ /*
+ * XXX: Even though the SH4-202 Evaluation Device documentation
+ * indicates that VCRL is mapped first with VCRH at a + 0x04
+ * offset, the opposite seems to be true.
+ *
+ * Some modules (PBR and ePBR for instance) also appear to have
+ * VCRL/VCRH flipped in the documentation, but on the SH4-202
+ * itself it appears that these are all consistently mapped with
+ * VCRH preceding VCRL.
+ *
+ * Do not trust the documentation, for it is evil.
+ */
+ vcrh = __raw_readl(base);
+ vcrl = __raw_readl(base + sizeof(u32));
+
+ tmp = ((u64)vcrh << 32) | vcrl;
+ memcpy(vcr, &tmp, sizeof(u64));
+
+ return 0;
+}
+
+static int sh4202_write_vcr(unsigned long base, struct superhyway_vcr_info vcr)
+{
+ u64 tmp = *(u64 *)&vcr;
+
+ __raw_writel((tmp >> 32) & 0xffffffff, base);
+ __raw_writel(tmp & 0xffffffff, base + sizeof(u32));
+
+ return 0;
+}
+
+static struct superhyway_ops sh4202_superhyway_ops = {
+ .read_vcr = sh4202_read_vcr,
+ .write_vcr = sh4202_write_vcr,
+};
+
+struct superhyway_bus superhyway_channels[] = {
+ { &sh4202_superhyway_ops, },
+ { 0, },
+};
+
+int __init superhyway_scan_bus(struct superhyway_bus *bus)
+{
+ return superhyway_add_devices(bus, sh4202_devices,
+ ARRAY_SIZE(sh4202_devices));
+}
+