[mirror_ubuntu-hirsute-kernel.git] / arch / powerpc / platforms / 44x / canyonlands.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * This contain platform specific code for APM PPC460EX based Canyonlands
 * board.
 *
 * Copyright (c) 2010, Applied Micro Circuits Corporation
 * Author: Rupjyoti Sarmah <rsarmah@apm.com>
 */
#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 const struct of_device_id ppc460ex_of_bus[] __initconst = {
	{ .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)
{
	if (of_machine_is_compatible("amcc,canyonlands")) {
		pci_set_flags(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,
};
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
8960f7ff RS	2	/*
	3	* This contain platform specific code for APM PPC460EX based Canyonlands
	4	* board.
	5	*
	6	* Copyright (c) 2010, Applied Micro Circuits Corporation
	7	* Author: Rupjyoti Sarmah <rsarmah@apm.com>
8960f7ff RS	8	*/
	9	#include <linux/kernel.h>
	10	#include <linux/init.h>
	11	#include <asm/pci-bridge.h>
	12	#include <asm/ppc4xx.h>
	13	#include <asm/udbg.h>
	14	#include <asm/uic.h>
	15	#include <linux/of_platform.h>
	16	#include <linux/delay.h>
	17	#include "44x.h"
	18
	19	#define BCSR_USB_EN 0x11
	20
ce6d73c9	21	static const struct of_device_id ppc460ex_of_bus[] __initconst = {
8960f7ff RS	22	{ .compatible = "ibm,plb4", },
	23	{ .compatible = "ibm,opb", },
	24	{ .compatible = "ibm,ebc", },
	25	{ .compatible = "simple-bus", },
	26	{},
	27	};
	28
	29	static int __init ppc460ex_device_probe(void)
	30	{
	31	of_platform_bus_probe(NULL, ppc460ex_of_bus, NULL);
	32
	33	return 0;
	34	}
	35	machine_device_initcall(canyonlands, ppc460ex_device_probe);
	36
	37	/* Using this code only for the Canyonlands board. */
	38
	39	static int __init ppc460ex_probe(void)
	40	{
56571384	41	if (of_machine_is_compatible("amcc,canyonlands")) {
0e47ff1c	42	pci_set_flags(PCI_REASSIGN_ALL_RSRC);
8960f7ff	43	return 1;
56571384	44	}
8960f7ff RS	45	return 0;
	46	}
	47
	48	/* USB PHY fixup code on Canyonlands kit. */
	49
	50	static int __init ppc460ex_canyonlands_fixup(void)
	51	{
	52	u8 __iomem *bcsr ;
	53	void __iomem *vaddr;
	54	struct device_node *np;
	55	int ret = 0;
	56
	57	np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-bcsr");
	58	if (!np) {
	59	printk(KERN_ERR "failed did not find amcc, ppc460ex bcsr node\n");
	60	return -ENODEV;
	61	}
	62
	63	bcsr = of_iomap(np, 0);
	64	of_node_put(np);
	65
	66	if (!bcsr) {
	67	printk(KERN_CRIT "Could not remap bcsr\n");
	68	ret = -ENODEV;
	69	goto err_bcsr;
	70	}
	71
	72	np = of_find_compatible_node(NULL, NULL, "ibm,ppc4xx-gpio");
	73	if (!np) {
	74	printk(KERN_ERR "failed did not find ibm,ppc4xx-gpio node\n");
	75	return -ENODEV;
	76	}
	77
	78	vaddr = of_iomap(np, 0);
	79	of_node_put(np);
	80
	81	if (!vaddr) {
	82	printk(KERN_CRIT "Could not get gpio node address\n");
	83	ret = -ENODEV;
	84	goto err_gpio;
	85	}
	86	/* Disable USB, through the BCSR7 bits */
	87	setbits8(&bcsr[7], BCSR_USB_EN);
	88
	89	/* Wait for a while after reset */
	90	msleep(100);
	91
	92	/* Enable USB here */
	93	clrbits8(&bcsr[7], BCSR_USB_EN);
	94
	95	/*
	96	* Configure multiplexed gpio16 and gpio19 as alternate1 output
	97	* source after USB reset. In this configuration gpio16 will be
	98	* USB2HStop and gpio19 will be USB2DStop. For more details refer to
	99	* table 34-7 of PPC460EX user manual.
	100	*/
	101	setbits32((vaddr + GPIO0_OSRH), 0x42000000);
	102	setbits32((vaddr + GPIO0_TSRH), 0x42000000);
	103	err_gpio:
	104	iounmap(vaddr);
	105	err_bcsr:
	106	iounmap(bcsr);
	107	return ret;
	108	}
109	machine_device_initcall(canyonlands, ppc460ex_canyonlands_fixup);
110	define_machine(canyonlands) {
111	.name = "Canyonlands",
112	.probe = ppc460ex_probe,
113	.progress = udbg_progress,
114	.init_IRQ = uic_init_tree,
115	.get_irq = uic_get_irq,
116	.restart = ppc4xx_reset_system,
117	.calibrate_decr = generic_calibrate_decr,
118	};