ep88xc.c

  1/*
  2 * Platform setup for the Embedded Planet EP88xC board
  3 *
  4 * Author: Scott Wood <scottwood@freescale.com>
  5 * Copyright 2007 Freescale Semiconductor, Inc.
  6 *
  7 * This file is licensed under the terms of the GNU General Public License
  8 * version 2. This program is licensed "as is" without any warranty of any
  9 * kind, whether express or implied.
 10 */
 11
 12#include <linux/init.h>
 13#include <linux/of_address.h>
 14#include <linux/of_fdt.h>
 15#include <linux/of_platform.h>
 16
 17#include <asm/machdep.h>
 18#include <asm/io.h>
 19#include <asm/udbg.h>
 20#include <asm/cpm1.h>
 21
 22#include "mpc8xx.h"
 23#include "pic.h"
 24
 25struct cpm_pin {
 26	int port, pin, flags;
 27};
 28
 29static struct cpm_pin ep88xc_pins[] = {
 30	/* SMC1 */
 31	{1, 24, CPM_PIN_INPUT}, /* RX */
 32	{1, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
 33
 34	/* SCC2 */
 35	{0, 12, CPM_PIN_INPUT}, /* TX */
 36	{0, 13, CPM_PIN_INPUT}, /* RX */
 37	{2, 8, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CD */
 38	{2, 9, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CTS */
 39	{2, 14, CPM_PIN_INPUT}, /* RTS */
 40
 41	/* MII1 */
 42	{0, 0, CPM_PIN_INPUT},
 43	{0, 1, CPM_PIN_INPUT},
 44	{0, 2, CPM_PIN_INPUT},
 45	{0, 3, CPM_PIN_INPUT},
 46	{0, 4, CPM_PIN_OUTPUT},
 47	{0, 10, CPM_PIN_OUTPUT},
 48	{0, 11, CPM_PIN_OUTPUT},
 49	{1, 19, CPM_PIN_INPUT},
 50	{1, 31, CPM_PIN_INPUT},
 51	{2, 12, CPM_PIN_INPUT},
 52	{2, 13, CPM_PIN_INPUT},
 53	{3, 8, CPM_PIN_INPUT},
 54	{4, 30, CPM_PIN_OUTPUT},
 55	{4, 31, CPM_PIN_OUTPUT},
 56
 57	/* MII2 */
 58	{4, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 59	{4, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 60	{4, 16, CPM_PIN_OUTPUT},
 61	{4, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 62	{4, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 63	{4, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 64	{4, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 65	{4, 21, CPM_PIN_OUTPUT},
 66	{4, 22, CPM_PIN_OUTPUT},
 67	{4, 23, CPM_PIN_OUTPUT},
 68	{4, 24, CPM_PIN_OUTPUT},
 69	{4, 25, CPM_PIN_OUTPUT},
 70	{4, 26, CPM_PIN_OUTPUT},
 71	{4, 27, CPM_PIN_OUTPUT},
 72	{4, 28, CPM_PIN_OUTPUT},
 73	{4, 29, CPM_PIN_OUTPUT},
 74
 75	/* USB */
 76	{0, 6, CPM_PIN_INPUT},  /* CLK2 */
 77	{0, 14, CPM_PIN_INPUT}, /* USBOE */
 78	{0, 15, CPM_PIN_INPUT}, /* USBRXD */
 79	{2, 6, CPM_PIN_OUTPUT}, /* USBTXN */
 80	{2, 7, CPM_PIN_OUTPUT}, /* USBTXP */
 81	{2, 10, CPM_PIN_INPUT}, /* USBRXN */
 82	{2, 11, CPM_PIN_INPUT}, /* USBRXP */
 83
 84	/* Misc */
 85	{1, 26, CPM_PIN_INPUT}, /* BRGO2 */
 86	{1, 27, CPM_PIN_INPUT}, /* BRGO1 */
 87};
 88
 89static void __init init_ioports(void)
 90{
 91	int i;
 92
 93	for (i = 0; i < ARRAY_SIZE(ep88xc_pins); i++) {
 94		struct cpm_pin *pin = &ep88xc_pins[i];
 95		cpm1_set_pin(pin->port, pin->pin, pin->flags);
 96	}
 97
 98	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
 99	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_TX); /* USB */
100	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
101	cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
102	cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
103}
104
105static u8 __iomem *ep88xc_bcsr;
106
107#define BCSR7_SCC2_ENABLE 0x10
108
109#define BCSR8_PHY1_ENABLE 0x80
110#define BCSR8_PHY1_POWER  0x40
111#define BCSR8_PHY2_ENABLE 0x20
112#define BCSR8_PHY2_POWER  0x10
113
114#define BCSR9_USB_ENABLE  0x80
115#define BCSR9_USB_POWER   0x40
116#define BCSR9_USB_HOST    0x20
117#define BCSR9_USB_FULL_SPEED_TARGET 0x10
118
119static void __init ep88xc_setup_arch(void)
120{
121	struct device_node *np;
122
123	cpm_reset();
124	init_ioports();
125
126	np = of_find_compatible_node(NULL, NULL, "fsl,ep88xc-bcsr");
127	if (!np) {
128		printk(KERN_CRIT "Could not find fsl,ep88xc-bcsr node\n");
129		return;
130	}
131
132	ep88xc_bcsr = of_iomap(np, 0);
133	of_node_put(np);
134
135	if (!ep88xc_bcsr) {
136		printk(KERN_CRIT "Could not remap BCSR\n");
137		return;
138	}
139
140	setbits8(&ep88xc_bcsr[7], BCSR7_SCC2_ENABLE);
141	setbits8(&ep88xc_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
142	                          BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
143}
144
145static const struct of_device_id of_bus_ids[] __initconst = {
146	{ .name = "soc", },
147	{ .name = "cpm", },
148	{ .name = "localbus", },
149	{},
150};
151
152static int __init declare_of_platform_devices(void)
153{
154	/* Publish the QE devices */
155	of_platform_bus_probe(NULL, of_bus_ids, NULL);
156
157	return 0;
158}
159machine_device_initcall(ep88xc, declare_of_platform_devices);
160
161define_machine(ep88xc) {
162	.name = "Embedded Planet EP88xC",
163	.compatible = "fsl,ep88xc",
164	.setup_arch = ep88xc_setup_arch,
165	.init_IRQ = mpc8xx_pic_init,
166	.get_irq	= mpc8xx_get_irq,
167	.restart = mpc8xx_restart,
168	.calibrate_decr = mpc8xx_calibrate_decr,
169	.progress = udbg_progress,
170};