--- /dev/null
+/*
+ * Embedded Planet EP8248E support
+ *
+ * Copyright 2007 Freescale Semiconductor, Inc.
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/fsl_devices.h>
+#include <linux/mdio-bitbang.h>
+#include <linux/of_mdio.h>
+#include <linux/slab.h>
+#include <linux/of_platform.h>
+
+#include <asm/io.h>
+#include <asm/cpm2.h>
+#include <asm/udbg.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/mpc8260.h>
+#include <asm/prom.h>
+
+#include <sysdev/fsl_soc.h>
+#include <sysdev/cpm2_pic.h>
+
+#include "pq2.h"
+
+static u8 __iomem *ep8248e_bcsr;
+static struct device_node *ep8248e_bcsr_node;
+
+#define BCSR7_SCC2_ENABLE 0x10
+
+#define BCSR8_PHY1_ENABLE 0x80
+#define BCSR8_PHY1_POWER 0x40
+#define BCSR8_PHY2_ENABLE 0x20
+#define BCSR8_PHY2_POWER 0x10
+#define BCSR8_MDIO_READ 0x04
+#define BCSR8_MDIO_CLOCK 0x02
+#define BCSR8_MDIO_DATA 0x01
+
+#define BCSR9_USB_ENABLE 0x80
+#define BCSR9_USB_POWER 0x40
+#define BCSR9_USB_HOST 0x20
+#define BCSR9_USB_FULL_SPEED_TARGET 0x10
+
+static void __init ep8248e_pic_init(void)
+{
+ struct device_node *np = of_find_compatible_node(NULL, NULL, "fsl,pq2-pic");
+ if (!np) {
+ printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
+ return;
+ }
+
+ cpm2_pic_init(np);
+ of_node_put(np);
+}
+
+static void ep8248e_set_mdc(struct mdiobb_ctrl *ctrl, int level)
+{
+ if (level)
+ setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);
+ else
+ clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);
+
+ /* Read back to flush the write. */
+ in_8(&ep8248e_bcsr[8]);
+}
+
+static void ep8248e_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output)
+{
+ if (output)
+ clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);
+ else
+ setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);
+
+ /* Read back to flush the write. */
+ in_8(&ep8248e_bcsr[8]);
+}
+
+static void ep8248e_set_mdio_data(struct mdiobb_ctrl *ctrl, int data)
+{
+ if (data)
+ setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);
+ else
+ clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);
+
+ /* Read back to flush the write. */
+ in_8(&ep8248e_bcsr[8]);
+}
+
+static int ep8248e_get_mdio_data(struct mdiobb_ctrl *ctrl)
+{
+ return in_8(&ep8248e_bcsr[8]) & BCSR8_MDIO_DATA;
+}
+
+static const struct mdiobb_ops ep8248e_mdio_ops = {
+ .set_mdc = ep8248e_set_mdc,
+ .set_mdio_dir = ep8248e_set_mdio_dir,
+ .set_mdio_data = ep8248e_set_mdio_data,
+ .get_mdio_data = ep8248e_get_mdio_data,
+ .owner = THIS_MODULE,
+};
+
+static struct mdiobb_ctrl ep8248e_mdio_ctrl = {
+ .ops = &ep8248e_mdio_ops,
+};
+
+static int ep8248e_mdio_probe(struct platform_device *ofdev)
+{
+ struct mii_bus *bus;
+ struct resource res;
+ struct device_node *node;
+ int ret;
+
+ node = of_get_parent(ofdev->dev.of_node);
+ of_node_put(node);
+ if (node != ep8248e_bcsr_node)
+ return -ENODEV;
+
+ ret = of_address_to_resource(ofdev->dev.of_node, 0, &res);
+ if (ret)
+ return ret;
+
+ bus = alloc_mdio_bitbang(&ep8248e_mdio_ctrl);
+ if (!bus)
+ return -ENOMEM;
+
+ bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
+ if (bus->irq == NULL) {
+ ret = -ENOMEM;
+ goto err_free_bus;
+ }
+
+ bus->name = "ep8248e-mdio-bitbang";
+ bus->parent = &ofdev->dev;
+ snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);
+
+ ret = of_mdiobus_register(bus, ofdev->dev.of_node);
+ if (ret)
+ goto err_free_irq;
+
+ return 0;
+err_free_irq:
+ kfree(bus->irq);
+err_free_bus:
+ free_mdio_bitbang(bus);
+ return ret;
+}
+
+static int ep8248e_mdio_remove(struct platform_device *ofdev)
+{
+ BUG();
+ return 0;
+}
+
+static const struct of_device_id ep8248e_mdio_match[] = {
+ {
+ .compatible = "fsl,ep8248e-mdio-bitbang",
+ },
+ {},
+};
+
+static struct platform_driver ep8248e_mdio_driver = {
+ .driver = {
+ .name = "ep8248e-mdio-bitbang",
+ .of_match_table = ep8248e_mdio_match,
+ },
+ .probe = ep8248e_mdio_probe,
+ .remove = ep8248e_mdio_remove,
+};
+
+struct cpm_pin {
+ int port, pin, flags;
+};
+
+static __initdata struct cpm_pin ep8248e_pins[] = {
+ /* SMC1 */
+ {2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+
+ /* SCC1 */
+ {2, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
+ {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+
+ /* FCC1 */
+ {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
+ {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
+ {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
+ {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
+ {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
+ {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
+ {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+
+ /* FCC2 */
+ {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
+ {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+
+ /* I2C */
+ {4, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
+ {4, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
+
+ /* USB */
+ {2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+ {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+ {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+};
+
+static void __init init_ioports(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ep8248e_pins); i++) {
+ const struct cpm_pin *pin = &ep8248e_pins[i];
+ cpm2_set_pin(pin->port, pin->pin, pin->flags);
+ }
+
+ cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
+ cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
+ cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
+ cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_TX); /* USB */
+ cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
+ cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
+ cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
+ cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
+}
+
+static void __init ep8248e_setup_arch(void)
+{
+ if (ppc_md.progress)
+ ppc_md.progress("ep8248e_setup_arch()", 0);
+
+ cpm2_reset();
+
+ /* When this is set, snooping CPM DMA from RAM causes
+ * machine checks. See erratum SIU18.
+ */
+ clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
+
+ ep8248e_bcsr_node =
+ of_find_compatible_node(NULL, NULL, "fsl,ep8248e-bcsr");
+ if (!ep8248e_bcsr_node) {
+ printk(KERN_ERR "No bcsr in device tree\n");
+ return;
+ }
+
+ ep8248e_bcsr = of_iomap(ep8248e_bcsr_node, 0);
+ if (!ep8248e_bcsr) {
+ printk(KERN_ERR "Cannot map BCSR registers\n");
+ of_node_put(ep8248e_bcsr_node);
+ ep8248e_bcsr_node = NULL;
+ return;
+ }
+
+ setbits8(&ep8248e_bcsr[7], BCSR7_SCC2_ENABLE);
+ setbits8(&ep8248e_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
+ BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
+
+ init_ioports();
+
+ if (ppc_md.progress)
+ ppc_md.progress("ep8248e_setup_arch(), finish", 0);
+}
+
+static const struct of_device_id of_bus_ids[] __initconst = {
+ { .compatible = "simple-bus", },
+ { .compatible = "fsl,ep8248e-bcsr", },
+ {},
+};
+
+static int __init declare_of_platform_devices(void)
+{
+ of_platform_bus_probe(NULL, of_bus_ids, NULL);
+ platform_driver_register(&ep8248e_mdio_driver);
+
+ return 0;
+}
+machine_device_initcall(ep8248e, declare_of_platform_devices);
+
+/*
+ * Called very early, device-tree isn't unflattened
+ */
+static int __init ep8248e_probe(void)
+{
+ unsigned long root = of_get_flat_dt_root();
+ return of_flat_dt_is_compatible(root, "fsl,ep8248e");
+}
+
+define_machine(ep8248e)
+{
+ .name = "Embedded Planet EP8248E",
+ .probe = ep8248e_probe,
+ .setup_arch = ep8248e_setup_arch,
+ .init_IRQ = ep8248e_pic_init,
+ .get_irq = cpm2_get_irq,
+ .calibrate_decr = generic_calibrate_decr,
+ .restart = pq2_restart,
+ .progress = udbg_progress,
+};
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