1/*
2 * arch/arm/mach-iop32x/iq31244.c
3 *
4 * Board support code for the Intel EP80219 and IQ31244 platforms.
5 *
6 * Author: Rory Bolt <rorybolt@pacbell.net>
7 * Copyright (C) 2002 Rory Bolt
8 * Copyright 2003 (c) MontaVista, Software, Inc.
9 * Copyright (C) 2004 Intel Corp.
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 */
16
17#include <linux/mm.h>
18#include <linux/init.h>
19#include <linux/delay.h>
20#include <linux/kernel.h>
21#include <linux/pci.h>
22#include <linux/pm.h>
23#include <linux/string.h>
24#include <linux/slab.h>
25#include <linux/serial_core.h>
26#include <linux/serial_8250.h>
27#include <linux/mtd/physmap.h>
28#include <linux/platform_device.h>
29#include <asm/hardware.h>
30#include <asm/io.h>
31#include <asm/irq.h>
32#include <asm/mach/arch.h>
33#include <asm/mach/map.h>
34#include <asm/mach/pci.h>
35#include <asm/mach/time.h>
36#include <asm/mach-types.h>
37#include <asm/page.h>
38#include <asm/pgtable.h>
39#include <asm/arch/time.h>
40
41/*
42 * Until March of 2007 iq31244 platforms and ep80219 platforms shared the
43 * same machine id, and the processor type was used to select board type.
44 * However this assumption breaks for an iq80219 board which is an iop219
45 * processor on an iq31244 board.  The force_ep80219 flag has been added
46 * for old boot loaders using the iq31244 machine id for an ep80219 platform.
47 */
48static int force_ep80219;
49
50static int is_80219(void)
51{
52	extern int processor_id;
53	return !!((processor_id & 0xffffffe0) == 0x69052e20);
54}
55
56static int is_ep80219(void)
57{
58	if (machine_is_ep80219() || force_ep80219)
59		return 1;
60	else
61		return 0;
62}
63
64
65/*
66 * EP80219/IQ31244 timer tick configuration.
67 */
68static void __init iq31244_timer_init(void)
69{
70	if (is_ep80219()) {
71		/* 33.333 MHz crystal.  */
72		iop_init_time(200000000);
73	} else {
74		/* 33.000 MHz crystal.  */
75		iop_init_time(198000000);
76	}
77}
78
79static struct sys_timer iq31244_timer = {
80	.init		= iq31244_timer_init,
81	.offset		= iop_gettimeoffset,
82};
83
84
85/*
86 * IQ31244 I/O.
87 */
88static struct map_desc iq31244_io_desc[] __initdata = {
89	{	/* on-board devices */
90		.virtual	= IQ31244_UART,
91		.pfn		= __phys_to_pfn(IQ31244_UART),
92		.length		= 0x00100000,
93		.type		= MT_DEVICE,
94	},
95};
96
97void __init iq31244_map_io(void)
98{
99	iop3xx_map_io();
100	iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc));
101}
102
103
104/*
105 * EP80219/IQ31244 PCI.
106 */
107static int __init
108ep80219_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
109{
110	int irq;
111
112	if (slot == 0) {
113		/* CFlash */
114		irq = IRQ_IOP32X_XINT1;
115	} else if (slot == 1) {
116		/* 82551 Pro 100 */
117		irq = IRQ_IOP32X_XINT0;
118	} else if (slot == 2) {
119		/* PCI-X Slot */
120		irq = IRQ_IOP32X_XINT3;
121	} else if (slot == 3) {
122		/* SATA */
123		irq = IRQ_IOP32X_XINT2;
124	} else {
125		printk(KERN_ERR "ep80219_pci_map_irq() called for unknown "
126			"device PCI:%d:%d:%d\n", dev->bus->number,
127			PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
128		irq = -1;
129	}
130
131	return irq;
132}
133
134static struct hw_pci ep80219_pci __initdata = {
135	.swizzle	= pci_std_swizzle,
136	.nr_controllers = 1,
137	.setup		= iop3xx_pci_setup,
138	.preinit	= iop3xx_pci_preinit,
139	.scan		= iop3xx_pci_scan_bus,
140	.map_irq	= ep80219_pci_map_irq,
141};
142
143static int __init
144iq31244_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
145{
146	int irq;
147
148	if (slot == 0) {
149		/* CFlash */
150		irq = IRQ_IOP32X_XINT1;
151	} else if (slot == 1) {
152		/* SATA */
153		irq = IRQ_IOP32X_XINT2;
154	} else if (slot == 2) {
155		/* PCI-X Slot */
156		irq = IRQ_IOP32X_XINT3;
157	} else if (slot == 3) {
158		/* 82546 GigE */
159		irq = IRQ_IOP32X_XINT0;
160	} else {
161		printk(KERN_ERR "iq31244_pci_map_irq called for unknown "
162			"device PCI:%d:%d:%d\n", dev->bus->number,
163			PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
164		irq = -1;
165	}
166
167	return irq;
168}
169
170static struct hw_pci iq31244_pci __initdata = {
171	.swizzle	= pci_std_swizzle,
172	.nr_controllers = 1,
173	.setup		= iop3xx_pci_setup,
174	.preinit	= iop3xx_pci_preinit,
175	.scan		= iop3xx_pci_scan_bus,
176	.map_irq	= iq31244_pci_map_irq,
177};
178
179static int __init iq31244_pci_init(void)
180{
181	if (is_ep80219()) {
182		if (iop3xx_get_init_atu() == IOP3XX_INIT_ATU_ENABLE)
183			pci_common_init(&ep80219_pci);
184	} else if (machine_is_iq31244()) {
185		if (is_80219()) {
186			printk("note: iq31244 board type has been selected\n");
187			printk("note: to select ep80219 operation:\n");
188			printk("\t1/ specify \"force_ep80219\" on the kernel"
189				" command line\n");
190			printk("\t2/ update boot loader to pass"
191				" the ep80219 id: %d\n", MACH_TYPE_EP80219);
192		}
193
194		if (iop3xx_get_init_atu() == IOP3XX_INIT_ATU_ENABLE)
195			pci_common_init(&iq31244_pci);
196	}
197
198	return 0;
199}
200
201subsys_initcall(iq31244_pci_init);
202
203
204/*
205 * IQ31244 machine initialisation.
206 */
207static struct physmap_flash_data iq31244_flash_data = {
208	.width		= 2,
209};
210
211static struct resource iq31244_flash_resource = {
212	.start		= 0xf0000000,
213	.end		= 0xf07fffff,
214	.flags		= IORESOURCE_MEM,
215};
216
217static struct platform_device iq31244_flash_device = {
218	.name		= "physmap-flash",
219	.id		= 0,
220	.dev		= {
221		.platform_data	= &iq31244_flash_data,
222	},
223	.num_resources	= 1,
224	.resource	= &iq31244_flash_resource,
225};
226
227static struct plat_serial8250_port iq31244_serial_port[] = {
228	{
229		.mapbase	= IQ31244_UART,
230		.membase	= (char *)IQ31244_UART,
231		.irq		= IRQ_IOP32X_XINT1,
232		.flags		= UPF_SKIP_TEST,
233		.iotype		= UPIO_MEM,
234		.regshift	= 0,
235		.uartclk	= 1843200,
236	},
237	{ },
238};
239
240static struct resource iq31244_uart_resource = {
241	.start		= IQ31244_UART,
242	.end		= IQ31244_UART + 7,
243	.flags		= IORESOURCE_MEM,
244};
245
246static struct platform_device iq31244_serial_device = {
247	.name		= "serial8250",
248	.id		= PLAT8250_DEV_PLATFORM,
249	.dev		= {
250		.platform_data		= iq31244_serial_port,
251	},
252	.num_resources	= 1,
253	.resource	= &iq31244_uart_resource,
254};
255
256/*
257 * This function will send a SHUTDOWN_COMPLETE message to the PIC
258 * controller over I2C.  We are not using the i2c subsystem since
259 * we are going to power off and it may be removed
260 */
261void ep80219_power_off(void)
262{
263	/*
264	 * Send the Address byte w/ the start condition
265	 */
266	*IOP3XX_IDBR1 = 0x60;
267	*IOP3XX_ICR1 = 0xE9;
268	mdelay(1);
269
270	/*
271	 * Send the START_MSG byte w/ no start or stop condition
272	 */
273	*IOP3XX_IDBR1 = 0x0F;
274	*IOP3XX_ICR1 = 0xE8;
275	mdelay(1);
276
277	/*
278	 * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
279	 * stop condition
280	 */
281	*IOP3XX_IDBR1 = 0x03;
282	*IOP3XX_ICR1 = 0xE8;
283	mdelay(1);
284
285	/*
286	 * Send an ignored byte w/ stop condition
287	 */
288	*IOP3XX_IDBR1 = 0x00;
289	*IOP3XX_ICR1 = 0xEA;
290
291	while (1)
292		;
293}
294
295static void __init iq31244_init_machine(void)
296{
297	platform_device_register(&iop3xx_i2c0_device);
298	platform_device_register(&iop3xx_i2c1_device);
299	platform_device_register(&iq31244_flash_device);
300	platform_device_register(&iq31244_serial_device);
301
302	if (is_ep80219())
303		pm_power_off = ep80219_power_off;
304}
305
306static int __init force_ep80219_setup(char *str)
307{
308	force_ep80219 = 1;
309	return 1;
310}
311
312__setup("force_ep80219", force_ep80219_setup);
313
314MACHINE_START(IQ31244, "Intel IQ31244")
315	/* Maintainer: Intel Corp. */
316	.phys_io	= IQ31244_UART,
317	.io_pg_offst	= ((IQ31244_UART) >> 18) & 0xfffc,
318	.boot_params	= 0xa0000100,
319	.map_io		= iq31244_map_io,
320	.init_irq	= iop32x_init_irq,
321	.timer		= &iq31244_timer,
322	.init_machine	= iq31244_init_machine,
323MACHINE_END
324
325/* There should have been an ep80219 machine identifier from the beginning.
326 * Boot roms older than March 2007 do not know the ep80219 machine id.  Pass
327 * "force_ep80219" on the kernel command line, otherwise iq31244 operation
328 * will be selected.
329 */
330MACHINE_START(EP80219, "Intel EP80219")
331	/* Maintainer: Intel Corp. */
332	.phys_io	= IQ31244_UART,
333	.io_pg_offst	= ((IQ31244_UART) >> 18) & 0xfffc,
334	.boot_params	= 0xa0000100,
335	.map_io		= iq31244_map_io,
336	.init_irq	= iop32x_init_irq,
337	.timer		= &iq31244_timer,
338	.init_machine	= iq31244_init_machine,
339MACHINE_END
340