Required nodes:
+- core-module: the root node to the Integrator platforms must have
+ a core-module with regs and the compatible string
+ "arm,core-module-integrator"
+
+ Required properties for the core module:
+ - regs: the location and size of the core module registers, one
+ range of 0x200 bytes.
+
+- cpcon/syscon: the root node the Integrator/CP must have a /cpcon
+ node pointing to the CP control registers, and the Integrator/AP
+ must have a /syscon node pointing to the Integrator/AP system
+ controller. The AP syscon node must include the logical module
+ interrupts.
+
In the root node the Integrator/CP must have a /cpcon node pointing
to the CP control registers, and the Integrator/AP must have a
/syscon node pointing to the Integrator/AP system controller.
model = "ARM Integrator/AP";
compatible = "arm,integrator-ap";
+ core-module@10000000 {
+ compatible = "arm,core-module-integrator";
+ reg = <0x10000000 0x200>;
+ };
+
syscon {
/* AP system controller registers */
reg = <0x11000000 0x100>;
#include <linux/amba/serial.h>
#include <linux/io.h>
#include <linux/stat.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
#include <mach/hardware.h>
#include <mach/platform.h>
-#include <mach/cm.h>
#include <asm/mach-types.h>
#include <asm/mach/time.h>
#include <asm/pgtable.h>
+#include "cm.h"
#include "common.h"
static DEFINE_RAW_SPINLOCK(cm_lock);
+static void __iomem *cm_base;
/**
* cm_get - get the value from the CM_CTRL register
u32 val;
raw_spin_lock_irqsave(&cm_lock, flags);
- val = readl(CM_CTRL) & ~mask;
- writel(val | set, CM_CTRL);
+ val = readl(cm_base + INTEGRATOR_HDR_CTRL_OFFSET) & ~mask;
+ writel(val | set, cm_base + INTEGRATOR_HDR_CTRL_OFFSET);
raw_spin_unlock_irqrestore(&cm_lock, flags);
}
-EXPORT_SYMBOL(cm_control);
+static const char *integrator_arch_str(u32 id)
+{
+ switch ((id >> 16) & 0xff) {
+ case 0x00:
+ return "ASB little-endian";
+ case 0x01:
+ return "AHB little-endian";
+ case 0x03:
+ return "AHB-Lite system bus, bi-endian";
+ case 0x04:
+ return "AHB";
+ case 0x08:
+ return "AHB system bus, ASB processor bus";
+ default:
+ return "Unknown";
+ }
+}
+
+static const char *integrator_fpga_str(u32 id)
+{
+ switch ((id >> 12) & 0xf) {
+ case 0x01:
+ return "XC4062";
+ case 0x02:
+ return "XC4085";
+ case 0x03:
+ return "XVC600";
+ case 0x04:
+ return "EPM7256AE (Altera PLD)";
+ default:
+ return "Unknown";
+ }
+}
+
+void cm_clear_irqs(void)
+{
+ /* disable core module IRQs */
+ writel(0xffffffffU, cm_base + INTEGRATOR_HDR_IC_OFFSET +
+ IRQ_ENABLE_CLEAR);
+}
+
+static const struct of_device_id cm_match[] = {
+ { .compatible = "arm,core-module-integrator"},
+ { },
+};
+
+void cm_init(void)
+{
+ struct device_node *cm = of_find_matching_node(NULL, cm_match);
+ u32 val;
+
+ if (!cm) {
+ pr_crit("no core module node found in device tree\n");
+ return;
+ }
+ cm_base = of_iomap(cm, 0);
+ if (!cm_base) {
+ pr_crit("could not remap core module\n");
+ return;
+ }
+ cm_clear_irqs();
+ val = readl(cm_base + INTEGRATOR_HDR_ID_OFFSET);
+ pr_info("Detected ARM core module:\n");
+ pr_info(" Manufacturer: %02x\n", (val >> 24));
+ pr_info(" Architecture: %s\n", integrator_arch_str(val));
+ pr_info(" FPGA: %s\n", integrator_fpga_str(val));
+ pr_info(" Build: %02x\n", (val >> 4) & 0xFF);
+ pr_info(" Rev: %c\n", ('A' + (val & 0x03)));
+}
/*
* We need to stop things allocating the low memory; ideally we need a
struct device_attribute *attr,
char *buf)
{
- const char *arch;
-
- switch ((integrator_id >> 16) & 0xff) {
- case 0x00:
- arch = "ASB little-endian";
- break;
- case 0x01:
- arch = "AHB little-endian";
- break;
- case 0x03:
- arch = "AHB-Lite system bus, bi-endian";
- break;
- case 0x04:
- arch = "AHB";
- break;
- default:
- arch = "Unknown";
- break;
- }
-
- return sprintf(buf, "%s\n", arch);
+ return sprintf(buf, "%s\n", integrator_arch_str(integrator_id));
}
static struct device_attribute intcp_arch_attr =
struct device_attribute *attr,
char *buf)
{
- const char *fpga;
-
- switch ((integrator_id >> 12) & 0xf) {
- case 0x01:
- fpga = "XC4062";
- break;
- case 0x02:
- fpga = "XC4085";
- break;
- case 0x04:
- fpga = "EPM7256AE (Altera PLD)";
- break;
- default:
- fpga = "Unknown";
- break;
- }
-
- return sprintf(buf, "%s\n", fpga);
+ return sprintf(buf, "%s\n", integrator_fpga_str(integrator_id));
}
static struct device_attribute intcp_fpga_attr =
projects / karo-tx-linux.git / commitdiff