--- /dev/null
+/*
+ * Renesas Technology Europe SDK7786 Support.
+ *
+ * Copyright (C) 2010 Matt Fleming
+ * Copyright (C) 2010 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/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/regulator/fixed.h>
+#include <linux/regulator/machine.h>
+#include <linux/smsc911x.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <mach/fpga.h>
+#include <mach/irq.h>
+#include <asm/machvec.h>
+#include <asm/heartbeat.h>
+#include <asm/sizes.h>
+#include <asm/clock.h>
+#include <asm/reboot.h>
+#include <asm/smp-ops.h>
+
+static struct resource heartbeat_resource = {
+ .start = 0x07fff8b0,
+ .end = 0x07fff8b0 + sizeof(u16) - 1,
+ .flags = IORESOURCE_MEM | IORESOURCE_MEM_16BIT,
+};
+
+static struct platform_device heartbeat_device = {
+ .name = "heartbeat",
+ .id = -1,
+ .num_resources = 1,
+ .resource = &heartbeat_resource,
+};
+
+/* Dummy supplies, where voltage doesn't matter */
+static struct regulator_consumer_supply dummy_supplies[] = {
+ REGULATOR_SUPPLY("vddvario", "smsc911x"),
+ REGULATOR_SUPPLY("vdd33a", "smsc911x"),
+};
+
+static struct resource smsc911x_resources[] = {
+ [0] = {
+ .name = "smsc911x-memory",
+ .start = 0x07ffff00,
+ .end = 0x07ffff00 + SZ_256 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .name = "smsc911x-irq",
+ .start = evt2irq(0x2c0),
+ .end = evt2irq(0x2c0),
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct smsc911x_platform_config smsc911x_config = {
+ .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
+ .irq_type = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
+ .flags = SMSC911X_USE_32BIT,
+ .phy_interface = PHY_INTERFACE_MODE_MII,
+};
+
+static struct platform_device smsc911x_device = {
+ .name = "smsc911x",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(smsc911x_resources),
+ .resource = smsc911x_resources,
+ .dev = {
+ .platform_data = &smsc911x_config,
+ },
+};
+
+static struct resource smbus_fpga_resource = {
+ .start = 0x07fff9e0,
+ .end = 0x07fff9e0 + SZ_32 - 1,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device smbus_fpga_device = {
+ .name = "i2c-sdk7786",
+ .id = 0,
+ .num_resources = 1,
+ .resource = &smbus_fpga_resource,
+};
+
+static struct resource smbus_pcie_resource = {
+ .start = 0x07fffc30,
+ .end = 0x07fffc30 + SZ_32 - 1,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device smbus_pcie_device = {
+ .name = "i2c-sdk7786",
+ .id = 1,
+ .num_resources = 1,
+ .resource = &smbus_pcie_resource,
+};
+
+static struct i2c_board_info __initdata sdk7786_i2c_devices[] = {
+ {
+ I2C_BOARD_INFO("max6900", 0x68),
+ },
+};
+
+static struct platform_device *sh7786_devices[] __initdata = {
+ &heartbeat_device,
+ &smsc911x_device,
+ &smbus_fpga_device,
+ &smbus_pcie_device,
+};
+
+static int sdk7786_i2c_setup(void)
+{
+ unsigned int tmp;
+
+ /*
+ * Hand over I2C control to the FPGA.
+ */
+ tmp = fpga_read_reg(SBCR);
+ tmp &= ~SCBR_I2CCEN;
+ tmp |= SCBR_I2CMEN;
+ fpga_write_reg(tmp, SBCR);
+
+ return i2c_register_board_info(0, sdk7786_i2c_devices,
+ ARRAY_SIZE(sdk7786_i2c_devices));
+}
+
+static int __init sdk7786_devices_setup(void)
+{
+ int ret;
+
+ ret = platform_add_devices(sh7786_devices, ARRAY_SIZE(sh7786_devices));
+ if (unlikely(ret != 0))
+ return ret;
+
+ return sdk7786_i2c_setup();
+}
+device_initcall(sdk7786_devices_setup);
+
+static int sdk7786_mode_pins(void)
+{
+ return fpga_read_reg(MODSWR);
+}
+
+/*
+ * FPGA-driven PCIe clocks
+ *
+ * Historically these include the oscillator, clock B (slots 2/3/4) and
+ * clock A (slot 1 and the CPU clock). Newer revs of the PCB shove
+ * everything under a single PCIe clocks enable bit that happens to map
+ * to the same bit position as the oscillator bit for earlier FPGA
+ * versions.
+ *
+ * Given that the legacy clocks have the side-effect of shutting the CPU
+ * off through the FPGA along with the PCI slots, we simply leave them in
+ * their initial state and don't bother registering them with the clock
+ * framework.
+ */
+static int sdk7786_pcie_clk_enable(struct clk *clk)
+{
+ fpga_write_reg(fpga_read_reg(PCIECR) | PCIECR_CLKEN, PCIECR);
+ return 0;
+}
+
+static void sdk7786_pcie_clk_disable(struct clk *clk)
+{
+ fpga_write_reg(fpga_read_reg(PCIECR) & ~PCIECR_CLKEN, PCIECR);
+}
+
+static struct sh_clk_ops sdk7786_pcie_clk_ops = {
+ .enable = sdk7786_pcie_clk_enable,
+ .disable = sdk7786_pcie_clk_disable,
+};
+
+static struct clk sdk7786_pcie_clk = {
+ .ops = &sdk7786_pcie_clk_ops,
+};
+
+static struct clk_lookup sdk7786_pcie_cl = {
+ .con_id = "pcie_plat_clk",
+ .clk = &sdk7786_pcie_clk,
+};
+
+static int sdk7786_clk_init(void)
+{
+ struct clk *clk;
+ int ret;
+
+ /*
+ * Only handle the EXTAL case, anyone interfacing a crystal
+ * resonator will need to provide their own input clock.
+ */
+ if (test_mode_pin(MODE_PIN9))
+ return -EINVAL;
+
+ clk = clk_get(NULL, "extal");
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ ret = clk_set_rate(clk, 33333333);
+ clk_put(clk);
+
+ /*
+ * Setup the FPGA clocks.
+ */
+ ret = clk_register(&sdk7786_pcie_clk);
+ if (unlikely(ret)) {
+ pr_err("FPGA clock registration failed\n");
+ return ret;
+ }
+
+ clkdev_add(&sdk7786_pcie_cl);
+
+ return 0;
+}
+
+static void sdk7786_restart(char *cmd)
+{
+ fpga_write_reg(0xa5a5, SRSTR);
+}
+
+static void sdk7786_power_off(void)
+{
+ fpga_write_reg(fpga_read_reg(PWRCR) | PWRCR_PDWNREQ, PWRCR);
+
+ /*
+ * It can take up to 20us for the R8C to do its job, back off and
+ * wait a bit until we've been shut off. Even though newer FPGA
+ * versions don't set the ACK bit, the latency issue remains.
+ */
+ while ((fpga_read_reg(PWRCR) & PWRCR_PDWNACK) == 0)
+ cpu_sleep();
+}
+
+/* Initialize the board */
+static void __init sdk7786_setup(char **cmdline_p)
+{
+ pr_info("Renesas Technology Europe SDK7786 support:\n");
+
+ regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
+
+ sdk7786_fpga_init();
+ sdk7786_nmi_init();
+
+ pr_info("\tPCB revision:\t%d\n", fpga_read_reg(PCBRR) & 0xf);
+
+ machine_ops.restart = sdk7786_restart;
+ pm_power_off = sdk7786_power_off;
+
+ register_smp_ops(&shx3_smp_ops);
+}
+
+/*
+ * The Machine Vector
+ */
+static struct sh_machine_vector mv_sdk7786 __initmv = {
+ .mv_name = "SDK7786",
+ .mv_setup = sdk7786_setup,
+ .mv_mode_pins = sdk7786_mode_pins,
+ .mv_clk_init = sdk7786_clk_init,
+ .mv_init_irq = sdk7786_init_irq,
+};
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