--- /dev/null
+/*
+ * This contain platform specific code for APM PPC460EX based Canyonlands
+ * board.
+ *
+ * Copyright (c) 2010, Applied Micro Circuits Corporation
+ * Author: Rupjyoti Sarmah <rsarmah@apm.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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/pci-bridge.h>
+#include <asm/ppc4xx.h>
+#include <asm/udbg.h>
+#include <asm/uic.h>
+#include <linux/of_platform.h>
+#include <linux/delay.h>
+#include "44x.h"
+
+#define BCSR_USB_EN 0x11
+
+static __initdata struct of_device_id ppc460ex_of_bus[] = {
+ { .compatible = "ibm,plb4", },
+ { .compatible = "ibm,opb", },
+ { .compatible = "ibm,ebc", },
+ { .compatible = "simple-bus", },
+ {},
+};
+
+static int __init ppc460ex_device_probe(void)
+{
+ of_platform_bus_probe(NULL, ppc460ex_of_bus, NULL);
+
+ return 0;
+}
+machine_device_initcall(canyonlands, ppc460ex_device_probe);
+
+/* Using this code only for the Canyonlands board. */
+
+static int __init ppc460ex_probe(void)
+{
+ unsigned long root = of_get_flat_dt_root();
+ if (of_flat_dt_is_compatible(root, "amcc,canyonlands")) {
+ ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
+ return 1;
+ }
+ return 0;
+}
+
+/* USB PHY fixup code on Canyonlands kit. */
+
+static int __init ppc460ex_canyonlands_fixup(void)
+{
+ u8 __iomem *bcsr ;
+ void __iomem *vaddr;
+ struct device_node *np;
+ int ret = 0;
+
+ np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-bcsr");
+ if (!np) {
+ printk(KERN_ERR "failed did not find amcc, ppc460ex bcsr node\n");
+ return -ENODEV;
+ }
+
+ bcsr = of_iomap(np, 0);
+ of_node_put(np);
+
+ if (!bcsr) {
+ printk(KERN_CRIT "Could not remap bcsr\n");
+ ret = -ENODEV;
+ goto err_bcsr;
+ }
+
+ np = of_find_compatible_node(NULL, NULL, "ibm,ppc4xx-gpio");
+ if (!np) {
+ printk(KERN_ERR "failed did not find ibm,ppc4xx-gpio node\n");
+ return -ENODEV;
+ }
+
+ vaddr = of_iomap(np, 0);
+ of_node_put(np);
+
+ if (!vaddr) {
+ printk(KERN_CRIT "Could not get gpio node address\n");
+ ret = -ENODEV;
+ goto err_gpio;
+ }
+ /* Disable USB, through the BCSR7 bits */
+ setbits8(&bcsr[7], BCSR_USB_EN);
+
+ /* Wait for a while after reset */
+ msleep(100);
+
+ /* Enable USB here */
+ clrbits8(&bcsr[7], BCSR_USB_EN);
+
+ /*
+ * Configure multiplexed gpio16 and gpio19 as alternate1 output
+ * source after USB reset. In this configuration gpio16 will be
+ * USB2HStop and gpio19 will be USB2DStop. For more details refer to
+ * table 34-7 of PPC460EX user manual.
+ */
+ setbits32((vaddr + GPIO0_OSRH), 0x42000000);
+ setbits32((vaddr + GPIO0_TSRH), 0x42000000);
+err_gpio:
+ iounmap(vaddr);
+err_bcsr:
+ iounmap(bcsr);
+ return ret;
+}
+machine_device_initcall(canyonlands, ppc460ex_canyonlands_fixup);
+define_machine(canyonlands) {
+ .name = "Canyonlands",
+ .probe = ppc460ex_probe,
+ .progress = udbg_progress,
+ .init_IRQ = uic_init_tree,
+ .get_irq = uic_get_irq,
+ .restart = ppc4xx_reset_system,
+ .calibrate_decr = generic_calibrate_decr,
+};
projects / firefly-linux-kernel-4.4.55.git / commitdiff