summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-mv78xx0/common.c
blob: 45a05207b418d6e74ede06a932f12a8624f16f38 (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
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
/*
 * arch/arm/mach-mv78xx0/common.c
 *
 * Core functions for Marvell MV78xx0 SoCs
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/ata_platform.h>
#include <linux/clk-provider.h>
#include <linux/ethtool.h>
#include <asm/hardware/cache-feroceon-l2.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <linux/platform_data/usb-ehci-orion.h>
#include <linux/platform_data/mtd-orion_nand.h>
#include <plat/time.h>
#include <plat/common.h>
#include <plat/addr-map.h>
#include "mv78xx0.h"
#include "bridge-regs.h"
#include "common.h"

static int get_tclk(void);

/*****************************************************************************
 * Common bits
 ****************************************************************************/
int mv78xx0_core_index(void)
{
	u32 extra;

	/*
	 * Read Extra Features register.
	 */
	__asm__("mrc p15, 1, %0, c15, c1, 0" : "=r" (extra));

	return !!(extra & 0x00004000);
}

static int get_hclk(void)
{
	int hclk;

	/*
	 * HCLK tick rate is configured by DEV_D[7:5] pins.
	 */
	switch ((readl(SAMPLE_AT_RESET_LOW) >> 5) & 7) {
	case 0:
		hclk = 166666667;
		break;
	case 1:
		hclk = 200000000;
		break;
	case 2:
		hclk = 266666667;
		break;
	case 3:
		hclk = 333333333;
		break;
	case 4:
		hclk = 400000000;
		break;
	default:
		panic("unknown HCLK PLL setting: %.8x\n",
			readl(SAMPLE_AT_RESET_LOW));
	}

	return hclk;
}

static void get_pclk_l2clk(int hclk, int core_index, int *pclk, int *l2clk)
{
	u32 cfg;

	/*
	 * Core #0 PCLK/L2CLK is configured by bits [13:8], core #1
	 * PCLK/L2CLK by bits [19:14].
	 */
	if (core_index == 0) {
		cfg = (readl(SAMPLE_AT_RESET_LOW) >> 8) & 0x3f;
	} else {
		cfg = (readl(SAMPLE_AT_RESET_LOW) >> 14) & 0x3f;
	}

	/*
	 * Bits [11:8] ([17:14] for core #1) configure the PCLK:HCLK
	 * ratio (1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6).
	 */
	*pclk = ((u64)hclk * (2 + (cfg & 0xf))) >> 1;

	/*
	 * Bits [13:12] ([19:18] for core #1) configure the PCLK:L2CLK
	 * ratio (1, 2, 3).
	 */
	*l2clk = *pclk / (((cfg >> 4) & 3) + 1);
}

static int get_tclk(void)
{
	int tclk_freq;

	/*
	 * TCLK tick rate is configured by DEV_A[2:0] strap pins.
	 */
	switch ((readl(SAMPLE_AT_RESET_HIGH) >> 6) & 7) {
	case 1:
		tclk_freq = 166666667;
		break;
	case 3:
		tclk_freq = 200000000;
		break;
	default:
		panic("unknown TCLK PLL setting: %.8x\n",
			readl(SAMPLE_AT_RESET_HIGH));
	}

	return tclk_freq;
}


/*****************************************************************************
 * I/O Address Mapping
 ****************************************************************************/
static struct map_desc mv78xx0_io_desc[] __initdata = {
	{
		.virtual	= (unsigned long) MV78XX0_CORE_REGS_VIRT_BASE,
		.pfn		= 0,
		.length		= MV78XX0_CORE_REGS_SIZE,
		.type		= MT_DEVICE,
	}, {
		.virtual	= (unsigned long) MV78XX0_REGS_VIRT_BASE,
		.pfn		= __phys_to_pfn(MV78XX0_REGS_PHYS_BASE),
		.length		= MV78XX0_REGS_SIZE,
		.type		= MT_DEVICE,
	},
};

void __init mv78xx0_map_io(void)
{
	unsigned long phys;

	/*
	 * Map the right set of per-core registers depending on
	 * which core we are running on.
	 */
	if (mv78xx0_core_index() == 0) {
		phys = MV78XX0_CORE0_REGS_PHYS_BASE;
	} else {
		phys = MV78XX0_CORE1_REGS_PHYS_BASE;
	}
	mv78xx0_io_desc[0].pfn = __phys_to_pfn(phys);

	iotable_init(mv78xx0_io_desc, ARRAY_SIZE(mv78xx0_io_desc));
}


/*****************************************************************************
 * CLK tree
 ****************************************************************************/
static struct clk *tclk;

static void __init clk_init(void)
{
	tclk = clk_register_fixed_rate(NULL, "tclk", NULL, 0, get_tclk());

	orion_clkdev_init(tclk);
}

/*****************************************************************************
 * EHCI
 ****************************************************************************/
void __init mv78xx0_ehci0_init(void)
{
	orion_ehci_init(USB0_PHYS_BASE, IRQ_MV78XX0_USB_0, EHCI_PHY_NA);
}


/*****************************************************************************
 * EHCI1
 ****************************************************************************/
void __init mv78xx0_ehci1_init(void)
{
	orion_ehci_1_init(USB1_PHYS_BASE, IRQ_MV78XX0_USB_1);
}


/*****************************************************************************
 * EHCI2
 ****************************************************************************/
void __init mv78xx0_ehci2_init(void)
{
	orion_ehci_2_init(USB2_PHYS_BASE, IRQ_MV78XX0_USB_2);
}


/*****************************************************************************
 * GE00
 ****************************************************************************/
void __init mv78xx0_ge00_init(struct mv643xx_eth_platform_data *eth_data)
{
	orion_ge00_init(eth_data,
			GE00_PHYS_BASE, IRQ_MV78XX0_GE00_SUM,
			IRQ_MV78XX0_GE_ERR,
			MV643XX_TX_CSUM_DEFAULT_LIMIT);
}


/*****************************************************************************
 * GE01
 ****************************************************************************/
void __init mv78xx0_ge01_init(struct mv643xx_eth_platform_data *eth_data)
{
	orion_ge01_init(eth_data,
			GE01_PHYS_BASE, IRQ_MV78XX0_GE01_SUM,
			NO_IRQ,
			MV643XX_TX_CSUM_DEFAULT_LIMIT);
}


/*****************************************************************************
 * GE10
 ****************************************************************************/
void __init mv78xx0_ge10_init(struct mv643xx_eth_platform_data *eth_data)
{
	u32 dev, rev;

	/*
	 * On the Z0, ge10 and ge11 are internally connected back
	 * to back, and not brought out.
	 */
	mv78xx0_pcie_id(&dev, &rev);
	if (dev == MV78X00_Z0_DEV_ID) {
		eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
		eth_data->speed = SPEED_1000;
		eth_data->duplex = DUPLEX_FULL;
	}

	orion_ge10_init(eth_data,
			GE10_PHYS_BASE, IRQ_MV78XX0_GE10_SUM,
			NO_IRQ);
}


/*****************************************************************************
 * GE11
 ****************************************************************************/
void __init mv78xx0_ge11_init(struct mv643xx_eth_platform_data *eth_data)
{
	u32 dev, rev;

	/*
	 * On the Z0, ge10 and ge11 are internally connected back
	 * to back, and not brought out.
	 */
	mv78xx0_pcie_id(&dev, &rev);
	if (dev == MV78X00_Z0_DEV_ID) {
		eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
		eth_data->speed = SPEED_1000;
		eth_data->duplex = DUPLEX_FULL;
	}

	orion_ge11_init(eth_data,
			GE11_PHYS_BASE, IRQ_MV78XX0_GE11_SUM,
			NO_IRQ);
}

/*****************************************************************************
 * I2C
 ****************************************************************************/
void __init mv78xx0_i2c_init(void)
{
	orion_i2c_init(I2C_0_PHYS_BASE, IRQ_MV78XX0_I2C_0, 8);
	orion_i2c_1_init(I2C_1_PHYS_BASE, IRQ_MV78XX0_I2C_1, 8);
}

/*****************************************************************************
 * SATA
 ****************************************************************************/
void __init mv78xx0_sata_init(struct mv_sata_platform_data *sata_data)
{
	orion_sata_init(sata_data, SATA_PHYS_BASE, IRQ_MV78XX0_SATA);
}


/*****************************************************************************
 * UART0
 ****************************************************************************/
void __init mv78xx0_uart0_init(void)
{
	orion_uart0_init(UART0_VIRT_BASE, UART0_PHYS_BASE,
			 IRQ_MV78XX0_UART_0, tclk);
}


/*****************************************************************************
 * UART1
 ****************************************************************************/
void __init mv78xx0_uart1_init(void)
{
	orion_uart1_init(UART1_VIRT_BASE, UART1_PHYS_BASE,
			 IRQ_MV78XX0_UART_1, tclk);
}


/*****************************************************************************
 * UART2
 ****************************************************************************/
void __init mv78xx0_uart2_init(void)
{
	orion_uart2_init(UART2_VIRT_BASE, UART2_PHYS_BASE,
			 IRQ_MV78XX0_UART_2, tclk);
}

/*****************************************************************************
 * UART3
 ****************************************************************************/
void __init mv78xx0_uart3_init(void)
{
	orion_uart3_init(UART3_VIRT_BASE, UART3_PHYS_BASE,
			 IRQ_MV78XX0_UART_3, tclk);
}

/*****************************************************************************
 * Time handling
 ****************************************************************************/
void __init mv78xx0_init_early(void)
{
	orion_time_set_base(TIMER_VIRT_BASE);
	if (mv78xx0_core_index() == 0)
		mvebu_mbus_init("marvell,mv78xx0-mbus",
				BRIDGE_WINS_CPU0_BASE, BRIDGE_WINS_SZ,
				DDR_WINDOW_CPU0_BASE, DDR_WINDOW_CPU_SZ);
	else
		mvebu_mbus_init("marvell,mv78xx0-mbus",
				BRIDGE_WINS_CPU1_BASE, BRIDGE_WINS_SZ,
				DDR_WINDOW_CPU1_BASE, DDR_WINDOW_CPU_SZ);
}

void __init_refok mv78xx0_timer_init(void)
{
	orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
			IRQ_MV78XX0_TIMER_1, get_tclk());
}


/*****************************************************************************
 * General
 ****************************************************************************/
static char * __init mv78xx0_id(void)
{
	u32 dev, rev;

	mv78xx0_pcie_id(&dev, &rev);

	if (dev == MV78X00_Z0_DEV_ID) {
		if (rev == MV78X00_REV_Z0)
			return "MV78X00-Z0";
		else
			return "MV78X00-Rev-Unsupported";
	} else if (dev == MV78100_DEV_ID) {
		if (rev == MV78100_REV_A0)
			return "MV78100-A0";
		else if (rev == MV78100_REV_A1)
			return "MV78100-A1";
		else
			return "MV78100-Rev-Unsupported";
	} else if (dev == MV78200_DEV_ID) {
		if (rev == MV78100_REV_A0)
			return "MV78200-A0";
		else
			return "MV78200-Rev-Unsupported";
	} else {
		return "Device-Unknown";
	}
}

static int __init is_l2_writethrough(void)
{
	return !!(readl(CPU_CONTROL) & L2_WRITETHROUGH);
}

void __init mv78xx0_init(void)
{
	int core_index;
	int hclk;
	int pclk;
	int l2clk;

	core_index = mv78xx0_core_index();
	hclk = get_hclk();
	get_pclk_l2clk(hclk, core_index, &pclk, &l2clk);

	printk(KERN_INFO "%s ", mv78xx0_id());
	printk("core #%d, ", core_index);
	printk("PCLK = %dMHz, ", (pclk + 499999) / 1000000);
	printk("L2 = %dMHz, ", (l2clk + 499999) / 1000000);
	printk("HCLK = %dMHz, ", (hclk + 499999) / 1000000);
	printk("TCLK = %dMHz\n", (get_tclk() + 499999) / 1000000);

	if (IS_ENABLED(CONFIG_CACHE_FEROCEON_L2))
		feroceon_l2_init(is_l2_writethrough());

	/* Setup root of clk tree */
	clk_init();
}

void mv78xx0_restart(enum reboot_mode mode, const char *cmd)
{
	/*
	 * Enable soft reset to assert RSTOUTn.
	 */
	writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);

	/*
	 * Assert soft reset.
	 */
	writel(SOFT_RESET, SYSTEM_SOFT_RESET);

	while (1)
		;
}
OpenPOWER on IntegriCloud