1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * arch/arm/mach-iop32x/iq31244.c
4 *
5 * Board support code for the Intel EP80219 and IQ31244 platforms.
6 *
7 * Author: Rory Bolt <rorybolt@pacbell.net>
8 * Copyright (C) 2002 Rory Bolt
9 * Copyright 2003 (c) MontaVista, Software, Inc.
10 * Copyright (C) 2004 Intel Corp.
11 */
12
13#include <linux/mm.h>
14#include <linux/init.h>
15#include <linux/delay.h>
16#include <linux/kernel.h>
17#include <linux/pci.h>
18#include <linux/pm.h>
19#include <linux/string.h>
20#include <linux/serial_core.h>
21#include <linux/serial_8250.h>
22#include <linux/mtd/physmap.h>
23#include <linux/platform_device.h>
24#include <linux/io.h>
25#include <linux/gpio/machine.h>
26#include <asm/cputype.h>
27#include <asm/irq.h>
28#include <asm/mach/arch.h>
29#include <asm/mach/map.h>
30#include <asm/mach/pci.h>
31#include <asm/mach/time.h>
32#include <asm/mach-types.h>
33#include <asm/page.h>
34
35#include "hardware.h"
36#include "irqs.h"
37#include "gpio-iop32x.h"
38
39/*
40 * Until March of 2007 iq31244 platforms and ep80219 platforms shared the
41 * same machine id, and the processor type was used to select board type.
42 * However this assumption breaks for an iq80219 board which is an iop219
43 * processor on an iq31244 board.  The force_ep80219 flag has been added
44 * for old boot loaders using the iq31244 machine id for an ep80219 platform.
45 */
46static int force_ep80219;
47
48static int is_80219(void)
49{
50	return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20);
51}
52
53static int is_ep80219(void)
54{
55	if (machine_is_ep80219() || force_ep80219)
56		return 1;
57	else
58		return 0;
59}
60
61
62/*
63 * EP80219/IQ31244 timer tick configuration.
64 */
65static void __init iq31244_timer_init(void)
66{
67	if (is_ep80219()) {
68		/* 33.333 MHz crystal.  */
69		iop_init_time(200000000);
70	} else {
71		/* 33.000 MHz crystal.  */
72		iop_init_time(198000000);
73	}
74}
75
76
77/*
78 * IQ31244 I/O.
79 */
80static struct map_desc iq31244_io_desc[] __initdata = {
81	{	/* on-board devices */
82		.virtual	= IQ31244_UART,
83		.pfn		= __phys_to_pfn(IQ31244_UART),
84		.length		= 0x00100000,
85		.type		= MT_DEVICE,
86	},
87};
88
89void __init iq31244_map_io(void)
90{
91	iop3xx_map_io();
92	iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc));
93}
94
95
96/*
97 * EP80219/IQ31244 PCI.
98 */
99static int __init
100ep80219_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
101{
102	int irq;
103
104	if (slot == 0) {
105		/* CFlash */
106		irq = IRQ_IOP32X_XINT1;
107	} else if (slot == 1) {
108		/* 82551 Pro 100 */
109		irq = IRQ_IOP32X_XINT0;
110	} else if (slot == 2) {
111		/* PCI-X Slot */
112		irq = IRQ_IOP32X_XINT3;
113	} else if (slot == 3) {
114		/* SATA */
115		irq = IRQ_IOP32X_XINT2;
116	} else {
117		printk(KERN_ERR "ep80219_pci_map_irq() called for unknown "
118			"device PCI:%d:%d:%d\n", dev->bus->number,
119			PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
120		irq = -1;
121	}
122
123	return irq;
124}
125
126static struct hw_pci ep80219_pci __initdata = {
127	.nr_controllers = 1,
128	.ops		= &iop3xx_ops,
129	.setup		= iop3xx_pci_setup,
130	.preinit	= iop3xx_pci_preinit,
131	.map_irq	= ep80219_pci_map_irq,
132};
133
134static int __init
135iq31244_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
136{
137	int irq;
138
139	if (slot == 0) {
140		/* CFlash */
141		irq = IRQ_IOP32X_XINT1;
142	} else if (slot == 1) {
143		/* SATA */
144		irq = IRQ_IOP32X_XINT2;
145	} else if (slot == 2) {
146		/* PCI-X Slot */
147		irq = IRQ_IOP32X_XINT3;
148	} else if (slot == 3) {
149		/* 82546 GigE */
150		irq = IRQ_IOP32X_XINT0;
151	} else {
152		printk(KERN_ERR "iq31244_pci_map_irq called for unknown "
153			"device PCI:%d:%d:%d\n", dev->bus->number,
154			PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
155		irq = -1;
156	}
157
158	return irq;
159}
160
161static struct hw_pci iq31244_pci __initdata = {
162	.nr_controllers = 1,
163	.ops		= &iop3xx_ops,
164	.setup		= iop3xx_pci_setup,
165	.preinit	= iop3xx_pci_preinit,
166	.map_irq	= iq31244_pci_map_irq,
167};
168
169static int __init iq31244_pci_init(void)
170{
171	if (is_ep80219())
172		pci_common_init(&ep80219_pci);
173	else if (machine_is_iq31244()) {
174		if (is_80219()) {
175			printk("note: iq31244 board type has been selected\n");
176			printk("note: to select ep80219 operation:\n");
177			printk("\t1/ specify \"force_ep80219\" on the kernel"
178				" command line\n");
179			printk("\t2/ update boot loader to pass"
180				" the ep80219 id: %d\n", MACH_TYPE_EP80219);
181		}
182		pci_common_init(&iq31244_pci);
183	}
184
185	return 0;
186}
187
188subsys_initcall(iq31244_pci_init);
189
190
191/*
192 * IQ31244 machine initialisation.
193 */
194static struct physmap_flash_data iq31244_flash_data = {
195	.width		= 2,
196};
197
198static struct resource iq31244_flash_resource = {
199	.start		= 0xf0000000,
200	.end		= 0xf07fffff,
201	.flags		= IORESOURCE_MEM,
202};
203
204static struct platform_device iq31244_flash_device = {
205	.name		= "physmap-flash",
206	.id		= 0,
207	.dev		= {
208		.platform_data	= &iq31244_flash_data,
209	},
210	.num_resources	= 1,
211	.resource	= &iq31244_flash_resource,
212};
213
214static struct plat_serial8250_port iq31244_serial_port[] = {
215	{
216		.mapbase	= IQ31244_UART,
217		.membase	= (char *)IQ31244_UART,
218		.irq		= IRQ_IOP32X_XINT1,
219		.flags		= UPF_SKIP_TEST,
220		.iotype		= UPIO_MEM,
221		.regshift	= 0,
222		.uartclk	= 1843200,
223	},
224	{ },
225};
226
227static struct resource iq31244_uart_resource = {
228	.start		= IQ31244_UART,
229	.end		= IQ31244_UART + 7,
230	.flags		= IORESOURCE_MEM,
231};
232
233static struct platform_device iq31244_serial_device = {
234	.name		= "serial8250",
235	.id		= PLAT8250_DEV_PLATFORM,
236	.dev		= {
237		.platform_data		= iq31244_serial_port,
238	},
239	.num_resources	= 1,
240	.resource	= &iq31244_uart_resource,
241};
242
243/*
244 * This function will send a SHUTDOWN_COMPLETE message to the PIC
245 * controller over I2C.  We are not using the i2c subsystem since
246 * we are going to power off and it may be removed
247 */
248void ep80219_power_off(void)
249{
250	/*
251	 * Send the Address byte w/ the start condition
252	 */
253	*IOP3XX_IDBR1 = 0x60;
254	*IOP3XX_ICR1 = 0xE9;
255	mdelay(1);
256
257	/*
258	 * Send the START_MSG byte w/ no start or stop condition
259	 */
260	*IOP3XX_IDBR1 = 0x0F;
261	*IOP3XX_ICR1 = 0xE8;
262	mdelay(1);
263
264	/*
265	 * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
266	 * stop condition
267	 */
268	*IOP3XX_IDBR1 = 0x03;
269	*IOP3XX_ICR1 = 0xE8;
270	mdelay(1);
271
272	/*
273	 * Send an ignored byte w/ stop condition
274	 */
275	*IOP3XX_IDBR1 = 0x00;
276	*IOP3XX_ICR1 = 0xEA;
277
278	while (1)
279		;
280}
281
282static void __init iq31244_init_machine(void)
283{
284	register_iop32x_gpio();
285	gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup);
286	gpiod_add_lookup_table(&iop3xx_i2c1_gpio_lookup);
287	platform_device_register(&iop3xx_i2c0_device);
288	platform_device_register(&iop3xx_i2c1_device);
289	platform_device_register(&iq31244_flash_device);
290	platform_device_register(&iq31244_serial_device);
291	platform_device_register(&iop3xx_dma_0_channel);
292	platform_device_register(&iop3xx_dma_1_channel);
293
294	if (is_ep80219())
295		pm_power_off = ep80219_power_off;
296
297	if (!is_80219())
298		platform_device_register(&iop3xx_aau_channel);
299}
300
301static int __init force_ep80219_setup(char *str)
302{
303	force_ep80219 = 1;
304	return 1;
305}
306
307__setup("force_ep80219", force_ep80219_setup);
308
309MACHINE_START(IQ31244, "Intel IQ31244")
310	/* Maintainer: Intel Corp. */
311	.atag_offset	= 0x100,
312	.map_io		= iq31244_map_io,
313	.init_irq	= iop32x_init_irq,
314	.init_time	= iq31244_timer_init,
315	.init_machine	= iq31244_init_machine,
316	.restart	= iop3xx_restart,
317MACHINE_END
318
319/* There should have been an ep80219 machine identifier from the beginning.
320 * Boot roms older than March 2007 do not know the ep80219 machine id.  Pass
321 * "force_ep80219" on the kernel command line, otherwise iq31244 operation
322 * will be selected.
323 */
324MACHINE_START(EP80219, "Intel EP80219")
325	/* Maintainer: Intel Corp. */
326	.atag_offset	= 0x100,
327	.map_io		= iq31244_map_io,
328	.init_irq	= iop32x_init_irq,
329	.init_time	= iq31244_timer_init,
330	.init_machine	= iq31244_init_machine,
331	.restart	= iop3xx_restart,
332MACHINE_END
333