Root/arch/arm/mach-iop32x/iq31244.c

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/serial_core.h>
25#include <linux/serial_8250.h>
26#include <linux/mtd/physmap.h>
27#include <linux/platform_device.h>
28#include <linux/io.h>
29#include <mach/hardware.h>
30#include <asm/cputype.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 <mach/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    return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20);
53}
54
55static int is_ep80219(void)
56{
57    if (machine_is_ep80219() || force_ep80219)
58        return 1;
59    else
60        return 0;
61}
62
63
64/*
65 * EP80219/IQ31244 timer tick configuration.
66 */
67static void __init iq31244_timer_init(void)
68{
69    if (is_ep80219()) {
70        /* 33.333 MHz crystal. */
71        iop_init_time(200000000);
72    } else {
73        /* 33.000 MHz crystal. */
74        iop_init_time(198000000);
75    }
76}
77
78static struct sys_timer iq31244_timer = {
79    .init = iq31244_timer_init,
80};
81
82
83/*
84 * IQ31244 I/O.
85 */
86static struct map_desc iq31244_io_desc[] __initdata = {
87    { /* on-board devices */
88        .virtual = IQ31244_UART,
89        .pfn = __phys_to_pfn(IQ31244_UART),
90        .length = 0x00100000,
91        .type = MT_DEVICE,
92    },
93};
94
95void __init iq31244_map_io(void)
96{
97    iop3xx_map_io();
98    iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc));
99}
100
101
102/*
103 * EP80219/IQ31244 PCI.
104 */
105static int __init
106ep80219_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
107{
108    int irq;
109
110    if (slot == 0) {
111        /* CFlash */
112        irq = IRQ_IOP32X_XINT1;
113    } else if (slot == 1) {
114        /* 82551 Pro 100 */
115        irq = IRQ_IOP32X_XINT0;
116    } else if (slot == 2) {
117        /* PCI-X Slot */
118        irq = IRQ_IOP32X_XINT3;
119    } else if (slot == 3) {
120        /* SATA */
121        irq = IRQ_IOP32X_XINT2;
122    } else {
123        printk(KERN_ERR "ep80219_pci_map_irq() called for unknown "
124            "device PCI:%d:%d:%d\n", dev->bus->number,
125            PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
126        irq = -1;
127    }
128
129    return irq;
130}
131
132static struct hw_pci ep80219_pci __initdata = {
133    .swizzle = pci_std_swizzle,
134    .nr_controllers = 1,
135    .setup = iop3xx_pci_setup,
136    .preinit = iop3xx_pci_preinit,
137    .scan = iop3xx_pci_scan_bus,
138    .map_irq = ep80219_pci_map_irq,
139};
140
141static int __init
142iq31244_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
143{
144    int irq;
145
146    if (slot == 0) {
147        /* CFlash */
148        irq = IRQ_IOP32X_XINT1;
149    } else if (slot == 1) {
150        /* SATA */
151        irq = IRQ_IOP32X_XINT2;
152    } else if (slot == 2) {
153        /* PCI-X Slot */
154        irq = IRQ_IOP32X_XINT3;
155    } else if (slot == 3) {
156        /* 82546 GigE */
157        irq = IRQ_IOP32X_XINT0;
158    } else {
159        printk(KERN_ERR "iq31244_pci_map_irq called for unknown "
160            "device PCI:%d:%d:%d\n", dev->bus->number,
161            PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
162        irq = -1;
163    }
164
165    return irq;
166}
167
168static struct hw_pci iq31244_pci __initdata = {
169    .swizzle = pci_std_swizzle,
170    .nr_controllers = 1,
171    .setup = iop3xx_pci_setup,
172    .preinit = iop3xx_pci_preinit,
173    .scan = iop3xx_pci_scan_bus,
174    .map_irq = iq31244_pci_map_irq,
175};
176
177static int __init iq31244_pci_init(void)
178{
179    if (is_ep80219())
180        pci_common_init(&ep80219_pci);
181    else if (machine_is_iq31244()) {
182        if (is_80219()) {
183            printk("note: iq31244 board type has been selected\n");
184            printk("note: to select ep80219 operation:\n");
185            printk("\t1/ specify \"force_ep80219\" on the kernel"
186                " command line\n");
187            printk("\t2/ update boot loader to pass"
188                " the ep80219 id: %d\n", MACH_TYPE_EP80219);
189        }
190        pci_common_init(&iq31244_pci);
191    }
192
193    return 0;
194}
195
196subsys_initcall(iq31244_pci_init);
197
198
199/*
200 * IQ31244 machine initialisation.
201 */
202static struct physmap_flash_data iq31244_flash_data = {
203    .width = 2,
204};
205
206static struct resource iq31244_flash_resource = {
207    .start = 0xf0000000,
208    .end = 0xf07fffff,
209    .flags = IORESOURCE_MEM,
210};
211
212static struct platform_device iq31244_flash_device = {
213    .name = "physmap-flash",
214    .id = 0,
215    .dev = {
216        .platform_data = &iq31244_flash_data,
217    },
218    .num_resources = 1,
219    .resource = &iq31244_flash_resource,
220};
221
222static struct plat_serial8250_port iq31244_serial_port[] = {
223    {
224        .mapbase = IQ31244_UART,
225        .membase = (char *)IQ31244_UART,
226        .irq = IRQ_IOP32X_XINT1,
227        .flags = UPF_SKIP_TEST,
228        .iotype = UPIO_MEM,
229        .regshift = 0,
230        .uartclk = 1843200,
231    },
232    { },
233};
234
235static struct resource iq31244_uart_resource = {
236    .start = IQ31244_UART,
237    .end = IQ31244_UART + 7,
238    .flags = IORESOURCE_MEM,
239};
240
241static struct platform_device iq31244_serial_device = {
242    .name = "serial8250",
243    .id = PLAT8250_DEV_PLATFORM,
244    .dev = {
245        .platform_data = iq31244_serial_port,
246    },
247    .num_resources = 1,
248    .resource = &iq31244_uart_resource,
249};
250
251/*
252 * This function will send a SHUTDOWN_COMPLETE message to the PIC
253 * controller over I2C. We are not using the i2c subsystem since
254 * we are going to power off and it may be removed
255 */
256void ep80219_power_off(void)
257{
258    /*
259     * Send the Address byte w/ the start condition
260     */
261    *IOP3XX_IDBR1 = 0x60;
262    *IOP3XX_ICR1 = 0xE9;
263    mdelay(1);
264
265    /*
266     * Send the START_MSG byte w/ no start or stop condition
267     */
268    *IOP3XX_IDBR1 = 0x0F;
269    *IOP3XX_ICR1 = 0xE8;
270    mdelay(1);
271
272    /*
273     * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
274     * stop condition
275     */
276    *IOP3XX_IDBR1 = 0x03;
277    *IOP3XX_ICR1 = 0xE8;
278    mdelay(1);
279
280    /*
281     * Send an ignored byte w/ stop condition
282     */
283    *IOP3XX_IDBR1 = 0x00;
284    *IOP3XX_ICR1 = 0xEA;
285
286    while (1)
287        ;
288}
289
290static void __init iq31244_init_machine(void)
291{
292    platform_device_register(&iop3xx_i2c0_device);
293    platform_device_register(&iop3xx_i2c1_device);
294    platform_device_register(&iq31244_flash_device);
295    platform_device_register(&iq31244_serial_device);
296    platform_device_register(&iop3xx_dma_0_channel);
297    platform_device_register(&iop3xx_dma_1_channel);
298
299    if (is_ep80219())
300        pm_power_off = ep80219_power_off;
301
302    if (!is_80219())
303        platform_device_register(&iop3xx_aau_channel);
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    .boot_params = 0xa0000100,
317    .map_io = iq31244_map_io,
318    .init_irq = iop32x_init_irq,
319    .timer = &iq31244_timer,
320    .init_machine = iq31244_init_machine,
321MACHINE_END
322
323/* There should have been an ep80219 machine identifier from the beginning.
324 * Boot roms older than March 2007 do not know the ep80219 machine id. Pass
325 * "force_ep80219" on the kernel command line, otherwise iq31244 operation
326 * will be selected.
327 */
328MACHINE_START(EP80219, "Intel EP80219")
329    /* Maintainer: Intel Corp. */
330    .boot_params = 0xa0000100,
331    .map_io = iq31244_map_io,
332    .init_irq = iop32x_init_irq,
333    .timer = &iq31244_timer,
334    .init_machine = iq31244_init_machine,
335MACHINE_END
336

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