1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * arch/arm/mach-iop32x/iq31244.c
5 * Board support code for the Intel EP80219 and IQ31244 platforms.
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.
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/kernel.h>
17 #include <linux/pci.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>
25 #include <linux/gpio/machine.h>
26 #include <asm/cputype.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>
37 #include "gpio-iop32x.h"
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.
46 static int force_ep80219;
48 static int is_80219(void)
50 return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20);
53 static int is_ep80219(void)
55 if (machine_is_ep80219() || force_ep80219)
63 * EP80219/IQ31244 timer tick configuration.
65 static void __init iq31244_timer_init(void)
68 /* 33.333 MHz crystal. */
69 iop_init_time(200000000);
71 /* 33.000 MHz crystal. */
72 iop_init_time(198000000);
80 static struct map_desc iq31244_io_desc[] __initdata = {
81 { /* on-board devices */
82 .virtual = IQ31244_UART,
83 .pfn = __phys_to_pfn(IQ31244_UART),
89 void __init iq31244_map_io(void)
92 iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc));
97 * EP80219/IQ31244 PCI.
100 ep80219_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
106 irq = IRQ_IOP32X_XINT1;
107 } else if (slot == 1) {
109 irq = IRQ_IOP32X_XINT0;
110 } else if (slot == 2) {
112 irq = IRQ_IOP32X_XINT3;
113 } else if (slot == 3) {
115 irq = IRQ_IOP32X_XINT2;
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));
126 static struct hw_pci ep80219_pci __initdata = {
129 .setup = iop3xx_pci_setup,
130 .preinit = iop3xx_pci_preinit,
131 .map_irq = ep80219_pci_map_irq,
135 iq31244_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
141 irq = IRQ_IOP32X_XINT1;
142 } else if (slot == 1) {
144 irq = IRQ_IOP32X_XINT2;
145 } else if (slot == 2) {
147 irq = IRQ_IOP32X_XINT3;
148 } else if (slot == 3) {
150 irq = IRQ_IOP32X_XINT0;
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));
161 static struct hw_pci iq31244_pci __initdata = {
164 .setup = iop3xx_pci_setup,
165 .preinit = iop3xx_pci_preinit,
166 .map_irq = iq31244_pci_map_irq,
169 static int __init iq31244_pci_init(void)
172 pci_common_init(&ep80219_pci);
173 else if (machine_is_iq31244()) {
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"
179 printk("\t2/ update boot loader to pass"
180 " the ep80219 id: %d\n", MACH_TYPE_EP80219);
182 pci_common_init(&iq31244_pci);
188 subsys_initcall(iq31244_pci_init);
192 * IQ31244 machine initialisation.
194 static struct physmap_flash_data iq31244_flash_data = {
198 static struct resource iq31244_flash_resource = {
201 .flags = IORESOURCE_MEM,
204 static struct platform_device iq31244_flash_device = {
205 .name = "physmap-flash",
208 .platform_data = &iq31244_flash_data,
211 .resource = &iq31244_flash_resource,
214 static struct plat_serial8250_port iq31244_serial_port[] = {
216 .mapbase = IQ31244_UART,
217 .membase = (char *)IQ31244_UART,
218 .irq = IRQ_IOP32X_XINT1,
219 .flags = UPF_SKIP_TEST,
227 static struct resource iq31244_uart_resource = {
228 .start = IQ31244_UART,
229 .end = IQ31244_UART + 7,
230 .flags = IORESOURCE_MEM,
233 static struct platform_device iq31244_serial_device = {
234 .name = "serial8250",
235 .id = PLAT8250_DEV_PLATFORM,
237 .platform_data = iq31244_serial_port,
240 .resource = &iq31244_uart_resource,
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
248 void ep80219_power_off(void)
251 * Send the Address byte w/ the start condition
253 *IOP3XX_IDBR1 = 0x60;
258 * Send the START_MSG byte w/ no start or stop condition
260 *IOP3XX_IDBR1 = 0x0F;
265 * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
268 *IOP3XX_IDBR1 = 0x03;
273 * Send an ignored byte w/ stop condition
275 *IOP3XX_IDBR1 = 0x00;
282 static void __init iq31244_init_machine(void)
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);
295 pm_power_off = ep80219_power_off;
298 platform_device_register(&iop3xx_aau_channel);
301 static int __init force_ep80219_setup(char *str)
307 __setup("force_ep80219", force_ep80219_setup);
309 MACHINE_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,
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
324 MACHINE_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,