1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * arch/arm/mach-iop32x/n2100.c
4 *
5 * Board support code for the Thecus N2100 platform.
6 *
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.
11 */
12
13 #include <linux/mm.h>
14 #include <linux/init.h>
15 #include <linux/f75375s.h>
16 #include <linux/leds-pca9532.h>
17 #include <linux/delay.h>
18 #include <linux/kernel.h>
19 #include <linux/pci.h>
20 #include <linux/pm.h>
21 #include <linux/string.h>
22 #include <linux/serial_core.h>
23 #include <linux/serial_8250.h>
24 #include <linux/mtd/physmap.h>
25 #include <linux/i2c.h>
26 #include <linux/platform_device.h>
27 #include <linux/reboot.h>
28 #include <linux/io.h>
29 #include <linux/gpio.h>
30 #include <linux/gpio/machine.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
39 #include "hardware.h"
40 #include "irqs.h"
41 #include "gpio-iop32x.h"
42
43 /*
44 * N2100 timer tick configuration.
45 */
n2100_timer_init(void)46 static void __init n2100_timer_init(void)
47 {
48 /* 33.000 MHz crystal. */
49 iop_init_time(198000000);
50 }
51
52
53 /*
54 * N2100 I/O.
55 */
56 static struct map_desc n2100_io_desc[] __initdata = {
57 { /* on-board devices */
58 .virtual = N2100_UART,
59 .pfn = __phys_to_pfn(N2100_UART),
60 .length = 0x00100000,
61 .type = MT_DEVICE
62 },
63 };
64
n2100_map_io(void)65 void __init n2100_map_io(void)
66 {
67 iop3xx_map_io();
68 iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
69 }
70
71
72 /*
73 * N2100 PCI.
74 */
n2100_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)75 static int n2100_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
76 {
77 int irq;
78
79 if (PCI_SLOT(dev->devfn) == 1) {
80 /* RTL8110SB #1 */
81 irq = IRQ_IOP32X_XINT0;
82 } else if (PCI_SLOT(dev->devfn) == 2) {
83 /* RTL8110SB #2 */
84 irq = IRQ_IOP32X_XINT3;
85 } else if (PCI_SLOT(dev->devfn) == 3) {
86 /* Sil3512 */
87 irq = IRQ_IOP32X_XINT2;
88 } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
89 /* VT6212 INTA */
90 irq = IRQ_IOP32X_XINT1;
91 } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
92 /* VT6212 INTB */
93 irq = IRQ_IOP32X_XINT0;
94 } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
95 /* VT6212 INTC */
96 irq = IRQ_IOP32X_XINT2;
97 } else if (PCI_SLOT(dev->devfn) == 5) {
98 /* Mini-PCI slot */
99 irq = IRQ_IOP32X_XINT3;
100 } else {
101 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
102 "device PCI:%d:%d:%d\n", dev->bus->number,
103 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
104 irq = -1;
105 }
106
107 return irq;
108 }
109
110 static struct hw_pci n2100_pci __initdata = {
111 .nr_controllers = 1,
112 .ops = &iop3xx_ops,
113 .setup = iop3xx_pci_setup,
114 .preinit = iop3xx_pci_preinit,
115 .map_irq = n2100_pci_map_irq,
116 };
117
118 /*
119 * Both r8169 chips on the n2100 exhibit PCI parity problems. Turn
120 * off parity reporting for both ports so we don't get error interrupts
121 * for them.
122 */
n2100_fixup_r8169(struct pci_dev * dev)123 static void n2100_fixup_r8169(struct pci_dev *dev)
124 {
125 if (dev->bus->number == 0 &&
126 (dev->devfn == PCI_DEVFN(1, 0) ||
127 dev->devfn == PCI_DEVFN(2, 0)))
128 pci_disable_parity(dev);
129 }
130 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
131
n2100_pci_init(void)132 static int __init n2100_pci_init(void)
133 {
134 if (machine_is_n2100())
135 pci_common_init(&n2100_pci);
136
137 return 0;
138 }
139
140 subsys_initcall(n2100_pci_init);
141
142
143 /*
144 * N2100 machine initialisation.
145 */
146 static struct physmap_flash_data n2100_flash_data = {
147 .width = 2,
148 };
149
150 static struct resource n2100_flash_resource = {
151 .start = 0xf0000000,
152 .end = 0xf0ffffff,
153 .flags = IORESOURCE_MEM,
154 };
155
156 static struct platform_device n2100_flash_device = {
157 .name = "physmap-flash",
158 .id = 0,
159 .dev = {
160 .platform_data = &n2100_flash_data,
161 },
162 .num_resources = 1,
163 .resource = &n2100_flash_resource,
164 };
165
166
167 static struct plat_serial8250_port n2100_serial_port[] = {
168 {
169 .mapbase = N2100_UART,
170 .membase = (char *)N2100_UART,
171 .irq = 0,
172 .flags = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ,
173 .iotype = UPIO_MEM,
174 .regshift = 0,
175 .uartclk = 1843200,
176 },
177 { },
178 };
179
180 static struct resource n2100_uart_resource = {
181 .start = N2100_UART,
182 .end = N2100_UART + 7,
183 .flags = IORESOURCE_MEM,
184 };
185
186 static struct platform_device n2100_serial_device = {
187 .name = "serial8250",
188 .id = PLAT8250_DEV_PLATFORM,
189 .dev = {
190 .platform_data = n2100_serial_port,
191 },
192 .num_resources = 1,
193 .resource = &n2100_uart_resource,
194 };
195
196 static struct f75375s_platform_data n2100_f75375s = {
197 .pwm = { 255, 255 },
198 .pwm_enable = { 0, 0 },
199 };
200
201 static struct pca9532_platform_data n2100_leds = {
202 .leds = {
203 { .name = "n2100:red:satafail0",
204 .state = PCA9532_OFF,
205 .type = PCA9532_TYPE_LED,
206 },
207 { .name = "n2100:red:satafail1",
208 .state = PCA9532_OFF,
209 .type = PCA9532_TYPE_LED,
210 },
211 { .name = "n2100:blue:usb",
212 .state = PCA9532_OFF,
213 .type = PCA9532_TYPE_LED,
214 },
215 { .type = PCA9532_TYPE_NONE },
216
217 { .type = PCA9532_TYPE_NONE },
218 { .type = PCA9532_TYPE_NONE },
219 { .type = PCA9532_TYPE_NONE },
220 { .name = "n2100:red:usb",
221 .state = PCA9532_OFF,
222 .type = PCA9532_TYPE_LED,
223 },
224
225 { .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
226 { .type = PCA9532_TYPE_NONE }, /* reset gpio */
227 { .type = PCA9532_TYPE_NONE },
228 { .type = PCA9532_TYPE_NONE },
229
230 { .type = PCA9532_TYPE_NONE },
231 { .name = "n2100:orange:system",
232 .state = PCA9532_OFF,
233 .type = PCA9532_TYPE_LED,
234 },
235 { .name = "n2100:red:system",
236 .state = PCA9532_OFF,
237 .type = PCA9532_TYPE_LED,
238 },
239 { .name = "N2100 beeper" ,
240 .state = PCA9532_OFF,
241 .type = PCA9532_TYPE_N2100_BEEP,
242 },
243 },
244 .psc = { 0, 0 },
245 .pwm = { 0, 0 },
246 };
247
248 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
249 {
250 I2C_BOARD_INFO("rs5c372b", 0x32),
251 },
252 {
253 I2C_BOARD_INFO("f75375", 0x2e),
254 .platform_data = &n2100_f75375s,
255 },
256 {
257 I2C_BOARD_INFO("pca9532", 0x60),
258 .platform_data = &n2100_leds,
259 },
260 };
261
262 /*
263 * Pull PCA9532 GPIO #8 low to power off the machine.
264 */
n2100_power_off(void)265 static void n2100_power_off(void)
266 {
267 local_irq_disable();
268
269 /* Start condition, I2C address of PCA9532, write transaction. */
270 *IOP3XX_IDBR0 = 0xc0;
271 *IOP3XX_ICR0 = 0xe9;
272 mdelay(1);
273
274 /* Write address 0x08. */
275 *IOP3XX_IDBR0 = 0x08;
276 *IOP3XX_ICR0 = 0xe8;
277 mdelay(1);
278
279 /* Write data 0x01, stop condition. */
280 *IOP3XX_IDBR0 = 0x01;
281 *IOP3XX_ICR0 = 0xea;
282
283 while (1)
284 ;
285 }
286
n2100_restart(enum reboot_mode mode,const char * cmd)287 static void n2100_restart(enum reboot_mode mode, const char *cmd)
288 {
289 int ret;
290
291 ret = gpio_direction_output(N2100_HARDWARE_RESET, 0);
292 if (ret) {
293 pr_crit("could not drive reset GPIO low\n");
294 return;
295 }
296 /* Wait for reset to happen */
297 while (1)
298 ;
299 }
300
301
302 static struct timer_list power_button_poll_timer;
303
power_button_poll(struct timer_list * unused)304 static void power_button_poll(struct timer_list *unused)
305 {
306 if (gpio_get_value(N2100_POWER_BUTTON) == 0) {
307 ctrl_alt_del();
308 return;
309 }
310
311 power_button_poll_timer.expires = jiffies + (HZ / 10);
312 add_timer(&power_button_poll_timer);
313 }
314
n2100_request_gpios(void)315 static int __init n2100_request_gpios(void)
316 {
317 int ret;
318
319 if (!machine_is_n2100())
320 return 0;
321
322 ret = gpio_request(N2100_HARDWARE_RESET, "reset");
323 if (ret)
324 pr_err("could not request reset GPIO\n");
325
326 ret = gpio_request(N2100_POWER_BUTTON, "power");
327 if (ret)
328 pr_err("could not request power GPIO\n");
329 else {
330 ret = gpio_direction_input(N2100_POWER_BUTTON);
331 if (ret)
332 pr_err("could not set power GPIO as input\n");
333 }
334 /* Set up power button poll timer */
335 timer_setup(&power_button_poll_timer, power_button_poll, 0);
336 power_button_poll_timer.expires = jiffies + (HZ / 10);
337 add_timer(&power_button_poll_timer);
338 return 0;
339 }
340 device_initcall(n2100_request_gpios);
341
n2100_init_machine(void)342 static void __init n2100_init_machine(void)
343 {
344 register_iop32x_gpio();
345 gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup);
346 platform_device_register(&iop3xx_i2c0_device);
347 platform_device_register(&n2100_flash_device);
348 platform_device_register(&n2100_serial_device);
349 platform_device_register(&iop3xx_dma_0_channel);
350 platform_device_register(&iop3xx_dma_1_channel);
351
352 i2c_register_board_info(0, n2100_i2c_devices,
353 ARRAY_SIZE(n2100_i2c_devices));
354
355 pm_power_off = n2100_power_off;
356 }
357
358 MACHINE_START(N2100, "Thecus N2100")
359 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
360 .atag_offset = 0x100,
361 .nr_irqs = IOP32X_NR_IRQS,
362 .map_io = n2100_map_io,
363 .init_irq = iop32x_init_irq,
364 .init_time = n2100_timer_init,
365 .init_machine = n2100_init_machine,
366 .restart = n2100_restart,
367 MACHINE_END
368