arm64: dts: Revert "specify console via command line"
[linux/fpc-iii.git] / arch / arm / mach-ixp4xx / fsg-setup.c
blob507ee387876937c470b404fd935fce8f4db131b9
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * arch/arm/mach-ixp4xx/fsg-setup.c
5 * FSG board-setup
7 * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
9 * based on ixdp425-setup.c:
10 * Copyright (C) 2003-2004 MontaVista Software, Inc.
11 * based on nslu2-power.c
12 * Copyright (C) 2005 Tower Technologies
14 * Author: Rod Whitby <rod@whitby.id.au>
15 * Maintainers: http://www.nslu2-linux.org/
18 #include <linux/gpio.h>
19 #include <linux/if_ether.h>
20 #include <linux/irq.h>
21 #include <linux/serial.h>
22 #include <linux/serial_8250.h>
23 #include <linux/leds.h>
24 #include <linux/reboot.h>
25 #include <linux/i2c.h>
26 #include <linux/gpio/machine.h>
27 #include <linux/io.h>
28 #include <asm/mach-types.h>
29 #include <asm/mach/arch.h>
30 #include <asm/mach/flash.h>
32 #include "irqs.h"
34 #define FSG_SDA_PIN 12
35 #define FSG_SCL_PIN 13
37 #define FSG_SB_GPIO 4 /* sync button */
38 #define FSG_RB_GPIO 9 /* reset button */
39 #define FSG_UB_GPIO 10 /* usb button */
41 static struct flash_platform_data fsg_flash_data = {
42 .map_name = "cfi_probe",
43 .width = 2,
46 static struct resource fsg_flash_resource = {
47 .flags = IORESOURCE_MEM,
50 static struct platform_device fsg_flash = {
51 .name = "IXP4XX-Flash",
52 .id = 0,
53 .dev = {
54 .platform_data = &fsg_flash_data,
56 .num_resources = 1,
57 .resource = &fsg_flash_resource,
60 static struct gpiod_lookup_table fsg_i2c_gpiod_table = {
61 .dev_id = "i2c-gpio.0",
62 .table = {
63 GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SDA_PIN,
64 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
65 GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SCL_PIN,
66 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
70 static struct platform_device fsg_i2c_gpio = {
71 .name = "i2c-gpio",
72 .id = 0,
73 .dev = {
74 .platform_data = NULL,
78 static struct i2c_board_info __initdata fsg_i2c_board_info [] = {
80 I2C_BOARD_INFO("isl1208", 0x6f),
84 static struct resource fsg_uart_resources[] = {
86 .start = IXP4XX_UART1_BASE_PHYS,
87 .end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
88 .flags = IORESOURCE_MEM,
91 .start = IXP4XX_UART2_BASE_PHYS,
92 .end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
93 .flags = IORESOURCE_MEM,
97 static struct plat_serial8250_port fsg_uart_data[] = {
99 .mapbase = IXP4XX_UART1_BASE_PHYS,
100 .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
101 .irq = IRQ_IXP4XX_UART1,
102 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
103 .iotype = UPIO_MEM,
104 .regshift = 2,
105 .uartclk = IXP4XX_UART_XTAL,
108 .mapbase = IXP4XX_UART2_BASE_PHYS,
109 .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
110 .irq = IRQ_IXP4XX_UART2,
111 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
112 .iotype = UPIO_MEM,
113 .regshift = 2,
114 .uartclk = IXP4XX_UART_XTAL,
119 static struct platform_device fsg_uart = {
120 .name = "serial8250",
121 .id = PLAT8250_DEV_PLATFORM,
122 .dev = {
123 .platform_data = fsg_uart_data,
125 .num_resources = ARRAY_SIZE(fsg_uart_resources),
126 .resource = fsg_uart_resources,
129 static struct platform_device fsg_leds = {
130 .name = "fsg-led",
131 .id = -1,
134 /* Built-in 10/100 Ethernet MAC interfaces */
135 static struct resource fsg_eth_npeb_resources[] = {
137 .start = IXP4XX_EthB_BASE_PHYS,
138 .end = IXP4XX_EthB_BASE_PHYS + 0x0fff,
139 .flags = IORESOURCE_MEM,
143 static struct resource fsg_eth_npec_resources[] = {
145 .start = IXP4XX_EthC_BASE_PHYS,
146 .end = IXP4XX_EthC_BASE_PHYS + 0x0fff,
147 .flags = IORESOURCE_MEM,
151 static struct eth_plat_info fsg_plat_eth[] = {
153 .phy = 5,
154 .rxq = 3,
155 .txreadyq = 20,
156 }, {
157 .phy = 4,
158 .rxq = 4,
159 .txreadyq = 21,
163 static struct platform_device fsg_eth[] = {
165 .name = "ixp4xx_eth",
166 .id = IXP4XX_ETH_NPEB,
167 .dev = {
168 .platform_data = fsg_plat_eth,
170 .num_resources = ARRAY_SIZE(fsg_eth_npeb_resources),
171 .resource = fsg_eth_npeb_resources,
172 }, {
173 .name = "ixp4xx_eth",
174 .id = IXP4XX_ETH_NPEC,
175 .dev = {
176 .platform_data = fsg_plat_eth + 1,
178 .num_resources = ARRAY_SIZE(fsg_eth_npec_resources),
179 .resource = fsg_eth_npec_resources,
183 static struct platform_device *fsg_devices[] __initdata = {
184 &fsg_i2c_gpio,
185 &fsg_flash,
186 &fsg_leds,
187 &fsg_eth[0],
188 &fsg_eth[1],
191 static irqreturn_t fsg_power_handler(int irq, void *dev_id)
193 /* Signal init to do the ctrlaltdel action, this will bypass init if
194 * it hasn't started and do a kernel_restart.
196 ctrl_alt_del();
198 return IRQ_HANDLED;
201 static irqreturn_t fsg_reset_handler(int irq, void *dev_id)
203 /* This is the paper-clip reset which does an emergency reboot. */
204 printk(KERN_INFO "Restarting system.\n");
205 machine_restart(NULL);
207 /* This should never be reached. */
208 return IRQ_HANDLED;
211 static void __init fsg_init(void)
213 uint8_t __iomem *f;
215 ixp4xx_sys_init();
217 fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
218 fsg_flash_resource.end =
219 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
221 *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
222 *IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0;
224 /* Configure CS2 for operation, 8bit and writable */
225 *IXP4XX_EXP_CS2 = 0xbfff0002;
227 gpiod_add_lookup_table(&fsg_i2c_gpiod_table);
228 i2c_register_board_info(0, fsg_i2c_board_info,
229 ARRAY_SIZE(fsg_i2c_board_info));
231 /* This is only useful on a modified machine, but it is valuable
232 * to have it first in order to see debug messages, and so that
233 * it does *not* get removed if platform_add_devices fails!
235 (void)platform_device_register(&fsg_uart);
237 platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices));
239 if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler,
240 IRQF_TRIGGER_LOW, "FSG reset button", NULL) < 0) {
242 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
243 gpio_to_irq(FSG_RB_GPIO));
246 if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler,
247 IRQF_TRIGGER_LOW, "FSG power button", NULL) < 0) {
249 printk(KERN_DEBUG "Power Button IRQ %d not available\n",
250 gpio_to_irq(FSG_SB_GPIO));
254 * Map in a portion of the flash and read the MAC addresses.
255 * Since it is stored in BE in the flash itself, we need to
256 * byteswap it if we're in LE mode.
258 f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000);
259 if (f) {
260 #ifdef __ARMEB__
261 int i;
262 for (i = 0; i < 6; i++) {
263 fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i);
264 fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i);
266 #else
269 Endian-swapped reads from unaligned addresses are
270 required to extract the two MACs from the big-endian
271 Redboot config area in flash.
274 fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421);
275 fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420);
276 fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427);
277 fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426);
278 fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425);
279 fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424);
281 fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439);
282 fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F);
283 fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E);
284 fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D);
285 fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C);
286 fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443);
287 #endif
288 iounmap(f);
290 printk(KERN_INFO "FSG: Using MAC address %pM for port 0\n",
291 fsg_plat_eth[0].hwaddr);
292 printk(KERN_INFO "FSG: Using MAC address %pM for port 1\n",
293 fsg_plat_eth[1].hwaddr);
297 MACHINE_START(FSG, "Freecom FSG-3")
298 /* Maintainer: www.nslu2-linux.org */
299 .map_io = ixp4xx_map_io,
300 .init_early = ixp4xx_init_early,
301 .init_irq = ixp4xx_init_irq,
302 .init_time = ixp4xx_timer_init,
303 .atag_offset = 0x100,
304 .init_machine = fsg_init,
305 #if defined(CONFIG_PCI)
306 .dma_zone_size = SZ_64M,
307 #endif
308 .restart = ixp4xx_restart,
309 MACHINE_END