1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * arch/arm/mach-iop32x/em7210.c
  4 *
  5 * Board support code for the Lanner EM7210 platforms.
  6 *
  7 * Based on arch/arm/mach-iop32x/iq31244.c file.
  8 *
  9 * Copyright (C) 2007 Arnaud Patard <arnaud.patard@rtp-net.org>
 10 */
 11
 12#include <linux/mm.h>
 13#include <linux/init.h>
 14#include <linux/kernel.h>
 15#include <linux/pci.h>
 16#include <linux/pm.h>
 17#include <linux/serial_core.h>
 18#include <linux/serial_8250.h>
 19#include <linux/mtd/physmap.h>
 20#include <linux/platform_device.h>
 21#include <linux/i2c.h>
 22#include <linux/gpio.h>
 23#include <linux/gpio/machine.h>
 24#include <linux/io.h>
 25#include <linux/irq.h>
 26#include <asm/mach/arch.h>
 27#include <asm/mach/map.h>
 28#include <asm/mach/pci.h>
 29#include <asm/mach/time.h>
 30#include <asm/mach-types.h>
 31
 32#include "hardware.h"
 33#include "gpio-iop32x.h"
 34#include "irqs.h"
 35
 36static void __init em7210_timer_init(void)
 37{
 38	/* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
 39	/* 33.333 MHz crystal.                                */
 40	iop_init_time(200000000);
 41}
 42
 43/*
 44 * EM7210 RTC
 45 */
 46static struct i2c_board_info __initdata em7210_i2c_devices[] = {
 47	{
 48		I2C_BOARD_INFO("rs5c372a", 0x32),
 49	},
 50};
 51
 52/*
 53 * EM7210 I/O
 54 */
 55static struct map_desc em7210_io_desc[] __initdata = {
 56	{	/* on-board devices */
 57		.virtual	= IQ31244_UART,
 58		.pfn		= __phys_to_pfn(IQ31244_UART),
 59		.length		= 0x00100000,
 60		.type		= MT_DEVICE,
 61	},
 62};
 63
 64void __init em7210_map_io(void)
 65{
 66	iop3xx_map_io();
 67	iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
 68}
 69
 70
 71/*
 72 * EM7210 PCI
 73 */
 74#define INTA	IRQ_IOP32X_XINT0
 75#define INTB	IRQ_IOP32X_XINT1
 76#define INTC	IRQ_IOP32X_XINT2
 77#define INTD	IRQ_IOP32X_XINT3
 78
 79static int __init
 80em7210_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 81{
 82	static int pci_irq_table[][4] = {
 83		/*
 84		 * PCI IDSEL/INTPIN->INTLINE
 85		 * A       B       C       D
 86		 */
 87		{INTB, INTB, INTB, INTB}, /* console / uart */
 88		{INTA, INTA, INTA, INTA}, /* 1st 82541      */
 89		{INTD, INTD, INTD, INTD}, /* 2nd 82541      */
 90		{INTC, INTC, INTC, INTC}, /* GD31244        */
 91		{INTD, INTA, INTA, INTA}, /* mini-PCI       */
 92		{INTD, INTC, INTA, INTA}, /* NEC USB        */
 93	};
 94
 95	if (pin < 1 || pin > 4)
 96		return -1;
 97
 98	return pci_irq_table[slot % 6][pin - 1];
 99}
100
101static struct hw_pci em7210_pci __initdata = {
102	.nr_controllers = 1,
103	.ops		= &iop3xx_ops,
104	.setup		= iop3xx_pci_setup,
105	.preinit	= iop3xx_pci_preinit,
106	.map_irq	= em7210_pci_map_irq,
107};
108
109static int __init em7210_pci_init(void)
110{
111	if (machine_is_em7210())
112		pci_common_init(&em7210_pci);
113
114	return 0;
115}
116
117subsys_initcall(em7210_pci_init);
118
119
120/*
121 * EM7210 Flash
122 */
123static struct physmap_flash_data em7210_flash_data = {
124	.width		= 2,
125};
126
127static struct resource em7210_flash_resource = {
128	.start		= 0xf0000000,
129	.end		= 0xf1ffffff,
130	.flags		= IORESOURCE_MEM,
131};
132
133static struct platform_device em7210_flash_device = {
134	.name		= "physmap-flash",
135	.id		= 0,
136	.dev		= {
137		.platform_data	= &em7210_flash_data,
138	},
139	.num_resources	= 1,
140	.resource	= &em7210_flash_resource,
141};
142
143
144/*
145 * EM7210 UART
146 * The physical address of the serial port is 0xfe800000,
147 * so it can be used for physical and virtual address.
148 */
149static struct plat_serial8250_port em7210_serial_port[] = {
150	{
151		.mapbase	= IQ31244_UART,
152		.membase	= (char *)IQ31244_UART,
153		.irq		= IRQ_IOP32X_XINT1,
154		.flags		= UPF_SKIP_TEST,
155		.iotype		= UPIO_MEM,
156		.regshift	= 0,
157		.uartclk	= 1843200,
158	},
159	{ },
160};
161
162static struct resource em7210_uart_resource = {
163	.start		= IQ31244_UART,
164	.end		= IQ31244_UART + 7,
165	.flags		= IORESOURCE_MEM,
166};
167
168static struct platform_device em7210_serial_device = {
169	.name		= "serial8250",
170	.id		= PLAT8250_DEV_PLATFORM,
171	.dev		= {
172		.platform_data		= em7210_serial_port,
173	},
174	.num_resources	= 1,
175	.resource	= &em7210_uart_resource,
176};
177
178#define EM7210_HARDWARE_POWER 0
179
180void em7210_power_off(void)
181{
182	int ret;
183
184	ret = gpio_direction_output(EM7210_HARDWARE_POWER, 1);
185	if (ret)
186		pr_crit("could not drive power off GPIO high\n");
187}
188
189static int __init em7210_request_gpios(void)
190{
191	int ret;
192
193	if (!machine_is_em7210())
194		return 0;
195
196	ret = gpio_request(EM7210_HARDWARE_POWER, "power");
197	if (ret) {
198		pr_err("could not request power off GPIO\n");
199		return 0;
200	}
201
202	pm_power_off = em7210_power_off;
203
204	return 0;
205}
206device_initcall(em7210_request_gpios);
207
208static void __init em7210_init_machine(void)
209{
210	register_iop32x_gpio();
211	platform_device_register(&em7210_serial_device);
212	gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup);
213	gpiod_add_lookup_table(&iop3xx_i2c1_gpio_lookup);
214	platform_device_register(&iop3xx_i2c0_device);
215	platform_device_register(&iop3xx_i2c1_device);
216	platform_device_register(&em7210_flash_device);
217	platform_device_register(&iop3xx_dma_0_channel);
218	platform_device_register(&iop3xx_dma_1_channel);
219
220	i2c_register_board_info(0, em7210_i2c_devices,
221		ARRAY_SIZE(em7210_i2c_devices));
222}
223
224MACHINE_START(EM7210, "Lanner EM7210")
225	.atag_offset	= 0x100,
226	.map_io		= em7210_map_io,
227	.init_irq	= iop32x_init_irq,
228	.init_time	= em7210_timer_init,
229	.init_machine	= em7210_init_machine,
230	.restart	= iop3xx_restart,
231MACHINE_END