aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-orion5x/terastation_pro2-setup.c
blob: a34e4fac72b00993ac60ab69b1f0822810157a52 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
/*
 * Buffalo Terastation Pro II/Live Board Setup
 *
 * Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/mtd/physmap.h>
#include <linux/mv643xx_eth.h>
#include <linux/i2c.h>
#include <linux/serial_reg.h>
#include <asm/mach-types.h>
#include <asm/gpio.h>
#include <asm/mach/arch.h>
#include <asm/mach/pci.h>
#include <mach/orion5x.h>
#include "common.h"
#include "mpp.h"

/*****************************************************************************
 * Terastation Pro 2/Live Info
 ****************************************************************************/

/*
 * Terastation Pro 2 hardware :
 * - Marvell 88F5281-D0
 * - Marvell 88SX6042 SATA controller (PCI)
 * - Marvell 88E1118 Gigabit Ethernet PHY
 * - 256KB NOR flash
 * - 128MB of DDR RAM
 * - PCIe port (not equipped)
 */

/*
 * 256K NOR flash Device bus boot chip select
 */

#define TSP2_NOR_BOOT_BASE	0xf4000000
#define TSP2_NOR_BOOT_SIZE	SZ_256K

/*****************************************************************************
 * 256KB NOR Flash on BOOT Device
 ****************************************************************************/

static struct physmap_flash_data tsp2_nor_flash_data = {
	.width    = 1,
};

static struct resource tsp2_nor_flash_resource = {
	.flags = IORESOURCE_MEM,
	.start = TSP2_NOR_BOOT_BASE,
	.end   = TSP2_NOR_BOOT_BASE + TSP2_NOR_BOOT_SIZE - 1,
};

static struct platform_device tsp2_nor_flash = {
	.name          = "physmap-flash",
	.id            = 0,
	.dev           = {
		.platform_data	= &tsp2_nor_flash_data,
	},
	.num_resources = 1,
	.resource      = &tsp2_nor_flash_resource,
};

/*****************************************************************************
 * PCI
 ****************************************************************************/
#define TSP2_PCI_SLOT0_OFFS		7
#define TSP2_PCI_SLOT0_IRQ_PIN		11

void __init tsp2_pci_preinit(void)
{
	int pin;

	/*
	 * Configure PCI GPIO IRQ pins
	 */
	pin = TSP2_PCI_SLOT0_IRQ_PIN;
	if (gpio_request(pin, "PCI Int1") == 0) {
		if (gpio_direction_input(pin) == 0) {
			irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
		} else {
			printk(KERN_ERR "tsp2_pci_preinit failed "
					"to set_irq_type pin %d\n", pin);
			gpio_free(pin);
		}
	} else {
		printk(KERN_ERR "tsp2_pci_preinit failed to "
				"gpio_request %d\n", pin);
	}
}

static int __init tsp2_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
	int irq;

	/*
	 * Check for devices with hard-wired IRQs.
	 */
	irq = orion5x_pci_map_irq(dev, slot, pin);
	if (irq != -1)
		return irq;

	/*
	 * PCI IRQs are connected via GPIOs.
	 */
	if (slot == TSP2_PCI_SLOT0_OFFS)
		return gpio_to_irq(TSP2_PCI_SLOT0_IRQ_PIN);

	return -1;
}

static struct hw_pci tsp2_pci __initdata = {
	.nr_controllers = 2,
	.preinit        = tsp2_pci_preinit,
	.swizzle        = pci_std_swizzle,
	.setup          = orion5x_pci_sys_setup,
	.scan           = orion5x_pci_sys_scan_bus,
	.map_irq        = tsp2_pci_map_irq,
};

static int __init tsp2_pci_init(void)
{
	if (machine_is_terastation_pro2())
		pci_common_init(&tsp2_pci);

	return 0;
}

subsys_initcall(tsp2_pci_init);

/*****************************************************************************
 * Ethernet
 ****************************************************************************/

static struct mv643xx_eth_platform_data tsp2_eth_data = {
	.phy_addr	= 0,
};

/*****************************************************************************
 * RTC 5C372a on I2C bus
 ****************************************************************************/

#define TSP2_RTC_GPIO	9

static struct i2c_board_info __initdata tsp2_i2c_rtc = {
	I2C_BOARD_INFO("rs5c372a", 0x32),
};

/*****************************************************************************
 * Terastation Pro II specific power off method via UART1-attached
 * microcontroller
 ****************************************************************************/

#define UART1_REG(x)	(UART1_VIRT_BASE + ((UART_##x) << 2))

static int tsp2_miconread(unsigned char *buf, int count)
{
	int i;
	int timeout;

	for (i = 0; i < count; i++) {
		timeout = 10;

		while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) {
			if (--timeout == 0)
				break;
			udelay(1000);
		}

		if (timeout == 0)
			break;
		buf[i] = readl(UART1_REG(RX));
	}

	/* return read bytes */
	return i;
}

static int tsp2_miconwrite(const unsigned char *buf, int count)
{
	int i = 0;

	while (count--) {
		while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE))
			barrier();
		writel(buf[i++], UART1_REG(TX));
	}

	return 0;
}

static int tsp2_miconsend(const unsigned char *data, int count)
{
	int i;
	unsigned char checksum = 0;
	unsigned char recv_buf[40];
	unsigned char send_buf[40];
	unsigned char correct_ack[3];
	int retry = 2;

	/* Generate checksum */
	for (i = 0; i < count; i++)
		checksum -=  data[i];

	do {
		/* Send data */
		tsp2_miconwrite(data, count);

		/* send checksum */
		tsp2_miconwrite(&checksum, 1);

		if (tsp2_miconread(recv_buf, sizeof(recv_buf)) <= 3) {
			printk(KERN_ERR ">%s: receive failed.\n", __func__);

			/* send preamble to clear the receive buffer */
			memset(&send_buf, 0xff, sizeof(send_buf));
			tsp2_miconwrite(send_buf, sizeof(send_buf));

			/* make dummy reads */
			mdelay(100);
			tsp2_miconread(recv_buf, sizeof(recv_buf));
		} else {
			/* Generate expected ack */
			correct_ack[0] = 0x01;
			correct_ack[1] = data[1];
			correct_ack[2] = 0x00;

			/* checksum Check */
			if ((recv_buf[0] + recv_buf[1] + recv_buf[2] +
			     recv_buf[3]) & 0xFF) {
				printk(KERN_ERR ">%s: Checksum Error : "
					"Received data[%02x, %02x, %02x, %02x]"
					"\n", __func__, recv_buf[0],
					recv_buf[1], recv_buf[2], recv_buf[3]);
			} else {
				/* Check Received Data */
				if (correct_ack[0] == recv_buf[0] &&
				    correct_ack[1] == recv_buf[1] &&
				    correct_ack[2] == recv_buf[2]) {
					/* Interval for next command */
					mdelay(10);

					/* Receive ACK */
					return 0;
				}
			}
			/* Received NAK or illegal Data */
			printk(KERN_ERR ">%s: Error : NAK or Illegal Data "
					"Received\n", __func__);
		}
	} while (retry--);

	/* Interval for next command */
	mdelay(10);

	return -1;
}

static void tsp2_power_off(void)
{
	const unsigned char watchdogkill[]	= {0x01, 0x35, 0x00};
	const unsigned char shutdownwait[]	= {0x00, 0x0c};
	const unsigned char poweroff[]		= {0x00, 0x06};
	/* 38400 baud divisor */
	const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400));

	pr_info("%s: triggering power-off...\n", __func__);

	/* hijack uart1 and reset into sane state (38400,8n1,even parity) */
	writel(0x83, UART1_REG(LCR));
	writel(divisor & 0xff, UART1_REG(DLL));
	writel((divisor >> 8) & 0xff, UART1_REG(DLM));
	writel(0x1b, UART1_REG(LCR));
	writel(0x00, UART1_REG(IER));
	writel(0x07, UART1_REG(FCR));
	writel(0x00, UART1_REG(MCR));

	/* Send the commands to shutdown the Terastation Pro II */
	tsp2_miconsend(watchdogkill, sizeof(watchdogkill)) ;
	tsp2_miconsend(shutdownwait, sizeof(shutdownwait)) ;
	tsp2_miconsend(poweroff, sizeof(poweroff));
}

/*****************************************************************************
 * General Setup
 ****************************************************************************/
static unsigned int tsp2_mpp_modes[] __initdata = {
	MPP0_PCIE_RST_OUTn,
	MPP1_UNUSED,
	MPP2_UNUSED,
	MPP3_UNUSED,
	MPP4_NAND,		/* BOOT NAND Flash REn */
	MPP5_NAND,		/* BOOT NAND Flash WEn */
	MPP6_NAND,		/* BOOT NAND Flash HREn[0] */
	MPP7_NAND,		/* BOOT NAND Flash WEn[0] */
	MPP8_GPIO,		/* MICON int */
	MPP9_GPIO,		/* RTC int */
	MPP10_UNUSED,
	MPP11_GPIO,		/* PCI Int A */
	MPP12_UNUSED,
	MPP13_GPIO,		/* UPS on UART0 enable */
	MPP14_GPIO,		/* UPS low battery detection */
	MPP15_UNUSED,
	MPP16_UART,		/* UART1 RXD */
	MPP17_UART,		/* UART1 TXD */
	MPP18_UART,		/* UART1 CTSn */
	MPP19_UART,		/* UART1 RTSn */
	0,
};

static void __init tsp2_init(void)
{
	/*
	 * Setup basic Orion functions. Need to be called early.
	 */
	orion5x_init();

	orion5x_mpp_conf(tsp2_mpp_modes);

	/*
	 * Configure peripherals.
	 */
	orion5x_setup_dev_boot_win(TSP2_NOR_BOOT_BASE,
				   TSP2_NOR_BOOT_SIZE);
	platform_device_register(&tsp2_nor_flash);

	orion5x_ehci0_init();
	orion5x_eth_init(&tsp2_eth_data);
	orion5x_i2c_init();
	orion5x_uart0_init();
	orion5x_uart1_init();

	/* Get RTC IRQ and register the chip */
	if (gpio_request(TSP2_RTC_GPIO, "rtc") == 0) {
		if (gpio_direction_input(TSP2_RTC_GPIO) == 0)
			tsp2_i2c_rtc.irq = gpio_to_irq(TSP2_RTC_GPIO);
		else
			gpio_free(TSP2_RTC_GPIO);
	}
	if (tsp2_i2c_rtc.irq == 0)
		pr_warning("tsp2_init: failed to get RTC IRQ\n");
	i2c_register_board_info(0, &tsp2_i2c_rtc, 1);

	/* register Terastation Pro II specific power-off method */
	pm_power_off = tsp2_power_off;
}

MACHINE_START(TERASTATION_PRO2, "Buffalo Terastation Pro II/Live")
	/* Maintainer:  Sylver Bruneau <sylver.bruneau@googlemail.com> */
	.boot_params	= 0x00000100,
	.init_machine	= tsp2_init,
	.map_io		= orion5x_map_io,
	.init_early	= orion5x_init_early,
	.init_irq	= orion5x_init_irq,
	.timer		= &orion5x_timer,
	.fixup		= tag_fixup_mem32,
MACHINE_END