1 /*
2 * linux/arch/arm/mach-omap1/board-voiceblue.c
3 *
4 * Modified from board-generic.c
5 *
6 * Copyright (C) 2004 2N Telekomunikace, Ladislav Michl <michl@2n.cz>
7 *
8 * Code for OMAP5910 based VoiceBlue board (VoIP to GSM gateway).
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/gpio.h>
17 #include <linux/platform_device.h>
18 #include <linux/interrupt.h>
19 #include <linux/irq.h>
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/mtd/physmap.h>
23 #include <linux/notifier.h>
24 #include <linux/reboot.h>
25 #include <linux/serial_8250.h>
26 #include <linux/serial_reg.h>
27 #include <linux/smc91x.h>
28 #include <linux/export.h>
29
30 #include <asm/mach-types.h>
31 #include <asm/mach/arch.h>
32 #include <asm/mach/map.h>
33
34 #include <plat/board-voiceblue.h>
35 #include <plat/flash.h>
36 #include <plat/mux.h>
37 #include <plat/tc.h>
38 #include <plat/usb.h>
39
40 #include <mach/hardware.h>
41
42 #include "common.h"
43
44 static struct plat_serial8250_port voiceblue_ports[] = {
45 {
46 .mapbase = (unsigned long)(OMAP_CS1_PHYS + 0x40000),
47 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
48 .iotype = UPIO_MEM,
49 .regshift = 1,
50 .uartclk = 3686400,
51 },
52 {
53 .mapbase = (unsigned long)(OMAP_CS1_PHYS + 0x50000),
54 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
55 .iotype = UPIO_MEM,
56 .regshift = 1,
57 .uartclk = 3686400,
58 },
59 {
60 .mapbase = (unsigned long)(OMAP_CS1_PHYS + 0x60000),
61 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
62 .iotype = UPIO_MEM,
63 .regshift = 1,
64 .uartclk = 3686400,
65 },
66 {
67 .mapbase = (unsigned long)(OMAP_CS1_PHYS + 0x70000),
68 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
69 .iotype = UPIO_MEM,
70 .regshift = 1,
71 .uartclk = 3686400,
72 },
73 { },
74 };
75
76 static struct platform_device serial_device = {
77 .name = "serial8250",
78 .id = PLAT8250_DEV_PLATFORM1,
79 };
80
ext_uart_init(void)81 static int __init ext_uart_init(void)
82 {
83 if (!machine_is_voiceblue())
84 return -ENODEV;
85
86 voiceblue_ports[0].irq = gpio_to_irq(12);
87 voiceblue_ports[1].irq = gpio_to_irq(13);
88 voiceblue_ports[2].irq = gpio_to_irq(14);
89 voiceblue_ports[3].irq = gpio_to_irq(15);
90 serial_device.dev.platform_data = voiceblue_ports;
91 return platform_device_register(&serial_device);
92 }
93 arch_initcall(ext_uart_init);
94
95 static struct physmap_flash_data voiceblue_flash_data = {
96 .width = 2,
97 .set_vpp = omap1_set_vpp,
98 };
99
100 static struct resource voiceblue_flash_resource = {
101 .start = OMAP_CS0_PHYS,
102 .end = OMAP_CS0_PHYS + SZ_32M - 1,
103 .flags = IORESOURCE_MEM,
104 };
105
106 static struct platform_device voiceblue_flash_device = {
107 .name = "physmap-flash",
108 .id = 0,
109 .dev = {
110 .platform_data = &voiceblue_flash_data,
111 },
112 .num_resources = 1,
113 .resource = &voiceblue_flash_resource,
114 };
115
116 static struct smc91x_platdata voiceblue_smc91x_info = {
117 .flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
118 .leda = RPC_LED_100_10,
119 .ledb = RPC_LED_TX_RX,
120 };
121
122 static struct resource voiceblue_smc91x_resources[] = {
123 [0] = {
124 .start = OMAP_CS2_PHYS + 0x300,
125 .end = OMAP_CS2_PHYS + 0x300 + 16,
126 .flags = IORESOURCE_MEM,
127 },
128 [1] = {
129 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
130 },
131 };
132
133 static struct platform_device voiceblue_smc91x_device = {
134 .name = "smc91x",
135 .id = 0,
136 .dev = {
137 .platform_data = &voiceblue_smc91x_info,
138 },
139 .num_resources = ARRAY_SIZE(voiceblue_smc91x_resources),
140 .resource = voiceblue_smc91x_resources,
141 };
142
143 static struct platform_device *voiceblue_devices[] __initdata = {
144 &voiceblue_flash_device,
145 &voiceblue_smc91x_device,
146 };
147
148 static struct omap_usb_config voiceblue_usb_config __initdata = {
149 .hmc_mode = 3,
150 .register_host = 1,
151 .register_dev = 1,
152 .pins[0] = 2,
153 .pins[1] = 6,
154 .pins[2] = 6,
155 };
156
157 static struct omap_board_config_kernel voiceblue_config[] = {
158 };
159
160 #define MACHINE_PANICED 1
161 #define MACHINE_REBOOTING 2
162 #define MACHINE_REBOOT 4
163 static unsigned long machine_state;
164
panic_event(struct notifier_block * this,unsigned long event,void * ptr)165 static int panic_event(struct notifier_block *this, unsigned long event,
166 void *ptr)
167 {
168 if (test_and_set_bit(MACHINE_PANICED, &machine_state))
169 return NOTIFY_DONE;
170
171 /* Flash power LED */
172 omap_writeb(0x78, OMAP_LPG1_LCR);
173 omap_writeb(0x01, OMAP_LPG1_PMR); /* Enable clock */
174
175 return NOTIFY_DONE;
176 }
177
178 static struct notifier_block panic_block = {
179 .notifier_call = panic_event,
180 };
181
voiceblue_setup(void)182 static int __init voiceblue_setup(void)
183 {
184 if (!machine_is_voiceblue())
185 return -ENODEV;
186
187 /* Setup panic notifier */
188 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
189
190 return 0;
191 }
192 postcore_initcall(voiceblue_setup);
193
194 static int wdt_gpio_state;
195
voiceblue_wdt_enable(void)196 void voiceblue_wdt_enable(void)
197 {
198 gpio_direction_output(0, 0);
199 gpio_set_value(0, 1);
200 gpio_set_value(0, 0);
201 wdt_gpio_state = 0;
202 }
203
voiceblue_wdt_disable(void)204 void voiceblue_wdt_disable(void)
205 {
206 gpio_set_value(0, 0);
207 gpio_set_value(0, 1);
208 gpio_set_value(0, 0);
209 gpio_direction_input(0);
210 }
211
voiceblue_wdt_ping(void)212 void voiceblue_wdt_ping(void)
213 {
214 if (test_bit(MACHINE_REBOOT, &machine_state))
215 return;
216
217 wdt_gpio_state = !wdt_gpio_state;
218 gpio_set_value(0, wdt_gpio_state);
219 }
220
voiceblue_restart(char mode,const char * cmd)221 static void voiceblue_restart(char mode, const char *cmd)
222 {
223 /*
224 * Workaround for 5912/1611b bug mentioned in sprz209d.pdf p. 28
225 * "Global Software Reset Affects Traffic Controller Frequency".
226 */
227 if (cpu_is_omap5912()) {
228 omap_writew(omap_readw(DPLL_CTL) & ~(1 << 4), DPLL_CTL);
229 omap_writew(0x8, ARM_RSTCT1);
230 }
231
232 set_bit(MACHINE_REBOOT, &machine_state);
233 voiceblue_wdt_enable();
234 while (1) ;
235 }
236
237 EXPORT_SYMBOL(voiceblue_wdt_enable);
238 EXPORT_SYMBOL(voiceblue_wdt_disable);
239 EXPORT_SYMBOL(voiceblue_wdt_ping);
240
voiceblue_init(void)241 static void __init voiceblue_init(void)
242 {
243 /* mux pins for uarts */
244 omap_cfg_reg(UART1_TX);
245 omap_cfg_reg(UART1_RTS);
246 omap_cfg_reg(UART2_TX);
247 omap_cfg_reg(UART2_RTS);
248 omap_cfg_reg(UART3_TX);
249 omap_cfg_reg(UART3_RX);
250
251 /* Watchdog */
252 gpio_request(0, "Watchdog");
253 /* smc91x reset */
254 gpio_request(7, "SMC91x reset");
255 gpio_direction_output(7, 1);
256 udelay(2); /* wait at least 100ns */
257 gpio_set_value(7, 0);
258 mdelay(50); /* 50ms until PHY ready */
259 /* smc91x interrupt pin */
260 gpio_request(8, "SMC91x irq");
261 /* 16C554 reset*/
262 gpio_request(6, "16C554 reset");
263 gpio_direction_output(6, 0);
264 /* 16C554 interrupt pins */
265 gpio_request(12, "16C554 irq");
266 gpio_request(13, "16C554 irq");
267 gpio_request(14, "16C554 irq");
268 gpio_request(15, "16C554 irq");
269 irq_set_irq_type(gpio_to_irq(12), IRQ_TYPE_EDGE_RISING);
270 irq_set_irq_type(gpio_to_irq(13), IRQ_TYPE_EDGE_RISING);
271 irq_set_irq_type(gpio_to_irq(14), IRQ_TYPE_EDGE_RISING);
272 irq_set_irq_type(gpio_to_irq(15), IRQ_TYPE_EDGE_RISING);
273
274 voiceblue_smc91x_resources[1].start = gpio_to_irq(8);
275 voiceblue_smc91x_resources[1].end = gpio_to_irq(8);
276 platform_add_devices(voiceblue_devices, ARRAY_SIZE(voiceblue_devices));
277 omap_board_config = voiceblue_config;
278 omap_board_config_size = ARRAY_SIZE(voiceblue_config);
279 omap_serial_init();
280 omap1_usb_init(&voiceblue_usb_config);
281 omap_register_i2c_bus(1, 100, NULL, 0);
282
283 /* There is a good chance board is going up, so enable power LED
284 * (it is connected through invertor) */
285 omap_writeb(0x00, OMAP_LPG1_LCR);
286 omap_writeb(0x00, OMAP_LPG1_PMR); /* Disable clock */
287 }
288
289 MACHINE_START(VOICEBLUE, "VoiceBlue OMAP5910")
290 /* Maintainer: Ladislav Michl <michl@2n.cz> */
291 .atag_offset = 0x100,
292 .map_io = omap15xx_map_io,
293 .init_early = omap1_init_early,
294 .reserve = omap_reserve,
295 .init_irq = omap1_init_irq,
296 .init_machine = voiceblue_init,
297 .timer = &omap1_timer,
298 .restart = voiceblue_restart,
299 MACHINE_END
300