Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
[sfrench/cifs-2.6.git] / arch / arm / mach-ixp4xx / fsg-setup.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * arch/arm/mach-ixp4xx/fsg-setup.c
4  *
5  * FSG board-setup
6  *
7  * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
8  *
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
13  *
14  * Author: Rod Whitby <rod@whitby.id.au>
15  * Maintainers: http://www.nslu2-linux.org/
16  *
17  */
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>
31
32 #include "irqs.h"
33
34 #define FSG_SDA_PIN             12
35 #define FSG_SCL_PIN             13
36
37 #define FSG_SB_GPIO             4       /* sync button */
38 #define FSG_RB_GPIO             9       /* reset button */
39 #define FSG_UB_GPIO             10      /* usb button */
40
41 static struct flash_platform_data fsg_flash_data = {
42         .map_name               = "cfi_probe",
43         .width                  = 2,
44 };
45
46 static struct resource fsg_flash_resource = {
47         .flags                  = IORESOURCE_MEM,
48 };
49
50 static struct platform_device fsg_flash = {
51         .name                   = "IXP4XX-Flash",
52         .id                     = 0,
53         .dev = {
54                 .platform_data  = &fsg_flash_data,
55         },
56         .num_resources          = 1,
57         .resource               = &fsg_flash_resource,
58 };
59
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),
67         },
68 };
69
70 static struct platform_device fsg_i2c_gpio = {
71         .name                   = "i2c-gpio",
72         .id                     = 0,
73         .dev = {
74                 .platform_data  = NULL,
75         },
76 };
77
78 static struct i2c_board_info __initdata fsg_i2c_board_info [] = {
79         {
80                 I2C_BOARD_INFO("isl1208", 0x6f),
81         },
82 };
83
84 static struct resource fsg_uart_resources[] = {
85         {
86                 .start          = IXP4XX_UART1_BASE_PHYS,
87                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
88                 .flags          = IORESOURCE_MEM,
89         },
90         {
91                 .start          = IXP4XX_UART2_BASE_PHYS,
92                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
93                 .flags          = IORESOURCE_MEM,
94         }
95 };
96
97 static struct plat_serial8250_port fsg_uart_data[] = {
98         {
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,
106         },
107         {
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,
115         },
116         { }
117 };
118
119 static struct platform_device fsg_uart = {
120         .name                   = "serial8250",
121         .id                     = PLAT8250_DEV_PLATFORM,
122         .dev = {
123                 .platform_data  = fsg_uart_data,
124         },
125         .num_resources          = ARRAY_SIZE(fsg_uart_resources),
126         .resource               = fsg_uart_resources,
127 };
128
129 static struct platform_device fsg_leds = {
130         .name           = "fsg-led",
131         .id             = -1,
132 };
133
134 /* Built-in 10/100 Ethernet MAC interfaces */
135 static struct eth_plat_info fsg_plat_eth[] = {
136         {
137                 .phy            = 5,
138                 .rxq            = 3,
139                 .txreadyq       = 20,
140         }, {
141                 .phy            = 4,
142                 .rxq            = 4,
143                 .txreadyq       = 21,
144         }
145 };
146
147 static struct platform_device fsg_eth[] = {
148         {
149                 .name                   = "ixp4xx_eth",
150                 .id                     = IXP4XX_ETH_NPEB,
151                 .dev = {
152                         .platform_data  = fsg_plat_eth,
153                 },
154         }, {
155                 .name                   = "ixp4xx_eth",
156                 .id                     = IXP4XX_ETH_NPEC,
157                 .dev = {
158                         .platform_data  = fsg_plat_eth + 1,
159                 },
160         }
161 };
162
163 static struct platform_device *fsg_devices[] __initdata = {
164         &fsg_i2c_gpio,
165         &fsg_flash,
166         &fsg_leds,
167         &fsg_eth[0],
168         &fsg_eth[1],
169 };
170
171 static irqreturn_t fsg_power_handler(int irq, void *dev_id)
172 {
173         /* Signal init to do the ctrlaltdel action, this will bypass init if
174          * it hasn't started and do a kernel_restart.
175          */
176         ctrl_alt_del();
177
178         return IRQ_HANDLED;
179 }
180
181 static irqreturn_t fsg_reset_handler(int irq, void *dev_id)
182 {
183         /* This is the paper-clip reset which does an emergency reboot. */
184         printk(KERN_INFO "Restarting system.\n");
185         machine_restart(NULL);
186
187         /* This should never be reached. */
188         return IRQ_HANDLED;
189 }
190
191 static void __init fsg_init(void)
192 {
193         uint8_t __iomem *f;
194
195         ixp4xx_sys_init();
196
197         fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
198         fsg_flash_resource.end =
199                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
200
201         *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
202         *IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0;
203
204         /* Configure CS2 for operation, 8bit and writable */
205         *IXP4XX_EXP_CS2 = 0xbfff0002;
206
207         gpiod_add_lookup_table(&fsg_i2c_gpiod_table);
208         i2c_register_board_info(0, fsg_i2c_board_info,
209                                 ARRAY_SIZE(fsg_i2c_board_info));
210
211         /* This is only useful on a modified machine, but it is valuable
212          * to have it first in order to see debug messages, and so that
213          * it does *not* get removed if platform_add_devices fails!
214          */
215         (void)platform_device_register(&fsg_uart);
216
217         platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices));
218
219         if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler,
220                         IRQF_TRIGGER_LOW, "FSG reset button", NULL) < 0) {
221
222                 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
223                         gpio_to_irq(FSG_RB_GPIO));
224         }
225
226         if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler,
227                         IRQF_TRIGGER_LOW, "FSG power button", NULL) < 0) {
228
229                 printk(KERN_DEBUG "Power Button IRQ %d not available\n",
230                         gpio_to_irq(FSG_SB_GPIO));
231         }
232
233         /*
234          * Map in a portion of the flash and read the MAC addresses.
235          * Since it is stored in BE in the flash itself, we need to
236          * byteswap it if we're in LE mode.
237          */
238         f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000);
239         if (f) {
240 #ifdef __ARMEB__
241                 int i;
242                 for (i = 0; i < 6; i++) {
243                         fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i);
244                         fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i);
245                 }
246 #else
247
248                 /*
249                   Endian-swapped reads from unaligned addresses are
250                   required to extract the two MACs from the big-endian
251                   Redboot config area in flash.
252                 */
253
254                 fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421);
255                 fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420);
256                 fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427);
257                 fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426);
258                 fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425);
259                 fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424);
260
261                 fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439);
262                 fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F);
263                 fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E);
264                 fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D);
265                 fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C);
266                 fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443);
267 #endif
268                 iounmap(f);
269         }
270         printk(KERN_INFO "FSG: Using MAC address %pM for port 0\n",
271                fsg_plat_eth[0].hwaddr);
272         printk(KERN_INFO "FSG: Using MAC address %pM for port 1\n",
273                fsg_plat_eth[1].hwaddr);
274
275 }
276
277 MACHINE_START(FSG, "Freecom FSG-3")
278         /* Maintainer: www.nslu2-linux.org */
279         .map_io         = ixp4xx_map_io,
280         .init_early     = ixp4xx_init_early,
281         .init_irq       = ixp4xx_init_irq,
282         .init_time      = ixp4xx_timer_init,
283         .atag_offset    = 0x100,
284         .init_machine   = fsg_init,
285 #if defined(CONFIG_PCI)
286         .dma_zone_size  = SZ_64M,
287 #endif
288         .restart        = ixp4xx_restart,
289 MACHINE_END
290