1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Keymile km82xx support
4 * Copyright 2008-2011 DENX Software Engineering GmbH
5 * Author: Heiko Schocher <hs@denx.de>
6 *
7 * based on code from:
8 * Copyright 2007 Freescale Semiconductor, Inc.
9 * Author: Scott Wood <scottwood@freescale.com>
10 */
11
12#include <linux/init.h>
13#include <linux/interrupt.h>
14#include <linux/fsl_devices.h>
15#include <linux/of_platform.h>
16
17#include <linux/io.h>
18#include <asm/cpm2.h>
19#include <asm/udbg.h>
20#include <asm/machdep.h>
21#include <linux/time.h>
22
23#include <sysdev/fsl_soc.h>
24#include <sysdev/cpm2_pic.h>
25
26#include "pq2.h"
27
28static void __init km82xx_pic_init(void)
29{
30	struct device_node *np = of_find_compatible_node(NULL, NULL,
31							"fsl,pq2-pic");
32	if (!np) {
33		pr_err("PIC init: can not find cpm-pic node\n");
34		return;
35	}
36
37	cpm2_pic_init(np);
38	of_node_put(np);
39}
40
41struct cpm_pin {
42	int port, pin, flags;
43};
44
45static __initdata struct cpm_pin km82xx_pins[] = {
46	/* SMC1 */
47	{2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
48	{2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
49
50	/* SMC2 */
51	{0, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
52	{0, 9, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
53
54	/* SCC1 */
55	{2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
56	{2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
57	{3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
58	{3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
59
60	/* SCC4 */
61	{2, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
62	{2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
63	{2,  9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
64	{2,  8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
65	{3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
66	{3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
67
68	/* FCC1 */
69	{0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
70	{0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
71	{0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
72	{0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
73	{0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
74	{0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
75	{0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
76	{0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
77	{0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
78	{0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
79	{0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
80	{0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
81	{0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
82	{0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
83
84	{2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
85	{2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
86
87	/* FCC2 */
88	{1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
89	{1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
90	{1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
91	{1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
92	{1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
93	{1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
94	{1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
95	{1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
96	{1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
97	{1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
98	{1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
99	{1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
100	{1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
101	{1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
102
103	{2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
104	{2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
105
106	/* MDC */
107	{0, 13, CPM_PIN_OUTPUT | CPM_PIN_GPIO},
108
109#if defined(CONFIG_I2C_CPM)
110	/* I2C */
111	{3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
112	{3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
113#endif
114
115	/* USB */
116	{0, 10, CPM_PIN_OUTPUT | CPM_PIN_GPIO},    /* FULL_SPEED */
117	{0, 11, CPM_PIN_OUTPUT | CPM_PIN_GPIO},    /*/SLAVE */
118	{2, 10, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXN */
119	{2, 11, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXP */
120	{2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* /OE */
121	{2, 27, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXCLK */
122	{3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXP */
123	{3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXN */
124	{3, 25, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXD */
125
126	/* SPI */
127	{3, 16, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MISO PD16 */
128	{3, 17, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MOSI PD17 */
129	{3, 18, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_CLK PD18 */
130};
131
132static void __init init_ioports(void)
133{
134	int i;
135
136	for (i = 0; i < ARRAY_SIZE(km82xx_pins); i++) {
137		const struct cpm_pin *pin = &km82xx_pins[i];
138		cpm2_set_pin(pin->port, pin->pin, pin->flags);
139	}
140
141	cpm2_smc_clk_setup(CPM_CLK_SMC2, CPM_BRG8);
142	cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
143	cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_RX);
144	cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_TX);
145	cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_RTX);
146	cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK7, CPM_CLK_RX);
147	cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK8, CPM_CLK_TX);
148	cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_RX);
149	cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9,  CPM_CLK_TX);
150	cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
151	cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
152
153	/* Force USB FULL SPEED bit to '1' */
154	setbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 10));
155	/* clear USB_SLAVE */
156	clrbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 11));
157}
158
159static void __init km82xx_setup_arch(void)
160{
161	if (ppc_md.progress)
162		ppc_md.progress("km82xx_setup_arch()", 0);
163
164	cpm2_reset();
165
166	/* When this is set, snooping CPM DMA from RAM causes
167	 * machine checks.  See erratum SIU18.
168	 */
169	clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
170
171	init_ioports();
172
173	if (ppc_md.progress)
174		ppc_md.progress("km82xx_setup_arch(), finish", 0);
175}
176
177static const struct of_device_id of_bus_ids[] __initconst = {
178	{ .compatible = "simple-bus", },
179	{},
180};
181
182static int __init declare_of_platform_devices(void)
183{
184	of_platform_bus_probe(NULL, of_bus_ids, NULL);
185
186	return 0;
187}
188machine_device_initcall(km82xx, declare_of_platform_devices);
189
190define_machine(km82xx)
191{
192	.name = "Keymile km82xx",
193	.compatible = "keymile,km82xx",
194	.setup_arch = km82xx_setup_arch,
195	.init_IRQ = km82xx_pic_init,
196	.get_irq = cpm2_get_irq,
197	.restart = pq2_restart,
198	.progress = udbg_progress,
199};
200