summaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/86xx/mpc8610_hpcd.c
blob: a817398a56da7c6b86c5a070cd58819b42bcdd63 (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
/*
 * MPC8610 HPCD board specific routines
 *
 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
 * Recode: Jason Jin <jason.jin@freescale.com>
 *         York Sun <yorksun@freescale.com>
 *
 * Rewrite the interrupt routing. remove the 8259PIC support,
 * All the integrated device in ULI use sideband interrupt.
 *
 * Copyright 2008 Freescale Semiconductor Inc.
 *
 * 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/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/of.h>

#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/prom.h>
#include <mm/mmu_decl.h>
#include <asm/udbg.h>

#include <asm/mpic.h>

#include <linux/of_platform.h>
#include <sysdev/fsl_pci.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/simple_gpio.h>
#include <asm/fsl_guts.h>

#include "mpc86xx.h"

static struct device_node *pixis_node;
static unsigned char *pixis_bdcfg0, *pixis_arch;

/* DIU Pixel Clock bits of the CLKDVDR Global Utilities register */
#define CLKDVDR_PXCKEN		0x80000000
#define CLKDVDR_PXCKINV		0x10000000
#define CLKDVDR_PXCKDLY		0x06000000
#define CLKDVDR_PXCLK_MASK	0x001F0000

#ifdef CONFIG_SUSPEND
static irqreturn_t mpc8610_sw9_irq(int irq, void *data)
{
	pr_debug("%s: PIXIS' event (sw9/wakeup) IRQ handled\n", __func__);
	return IRQ_HANDLED;
}

static void __init mpc8610_suspend_init(void)
{
	int irq;
	int ret;

	if (!pixis_node)
		return;

	irq = irq_of_parse_and_map(pixis_node, 0);
	if (!irq) {
		pr_err("%s: can't map pixis event IRQ.\n", __func__);
		return;
	}

	ret = request_irq(irq, mpc8610_sw9_irq, 0, "sw9:wakeup", NULL);
	if (ret) {
		pr_err("%s: can't request pixis event IRQ: %d\n",
		       __func__, ret);
		irq_dispose_mapping(irq);
	}

	enable_irq_wake(irq);
}
#else
static inline void mpc8610_suspend_init(void) { }
#endif /* CONFIG_SUSPEND */

static struct of_device_id __initdata mpc8610_ids[] = {
	{ .compatible = "fsl,mpc8610-immr", },
	{ .compatible = "fsl,mpc8610-guts", },
	{ .compatible = "simple-bus", },
	/* So that the DMA channel nodes can be probed individually: */
	{ .compatible = "fsl,eloplus-dma", },
	/* PCI controllers */
	{ .compatible = "fsl,mpc8610-pci", },
	{ .compatible = "fsl,mpc8641-pcie", },
	{}
};

static int __init mpc8610_declare_of_platform_devices(void)
{
	/* Firstly, register PIXIS GPIOs. */
	simple_gpiochip_init("fsl,fpga-pixis-gpio-bank");

	/* Enable wakeup on PIXIS' event IRQ. */
	mpc8610_suspend_init();

	/* Without this call, the SSI device driver won't get probed. */
	of_platform_bus_probe(NULL, mpc8610_ids, NULL);

	return 0;
}
machine_arch_initcall(mpc86xx_hpcd, mpc8610_declare_of_platform_devices);

#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)

/*
 * DIU Area Descriptor
 *
 * The MPC8610 reference manual shows the bits of the AD register in
 * little-endian order, which causes the BLUE_C field to be split into two
 * parts. To simplify the definition of the MAKE_AD() macro, we define the
 * fields in big-endian order and byte-swap the result.
 *
 * So even though the registers don't look like they're in the
 * same bit positions as they are on the P1022, the same value is written to
 * the AD register on the MPC8610 and on the P1022.
 */
#define AD_BYTE_F		0x10000000
#define AD_ALPHA_C_MASK		0x0E000000
#define AD_ALPHA_C_SHIFT	25
#define AD_BLUE_C_MASK		0x01800000
#define AD_BLUE_C_SHIFT		23
#define AD_GREEN_C_MASK		0x00600000
#define AD_GREEN_C_SHIFT	21
#define AD_RED_C_MASK		0x00180000
#define AD_RED_C_SHIFT		19
#define AD_PALETTE		0x00040000
#define AD_PIXEL_S_MASK		0x00030000
#define AD_PIXEL_S_SHIFT	16
#define AD_COMP_3_MASK		0x0000F000
#define AD_COMP_3_SHIFT		12
#define AD_COMP_2_MASK		0x00000F00
#define AD_COMP_2_SHIFT		8
#define AD_COMP_1_MASK		0x000000F0
#define AD_COMP_1_SHIFT		4
#define AD_COMP_0_MASK		0x0000000F
#define AD_COMP_0_SHIFT		0

#define MAKE_AD(alpha, red, blue, green, size, c0, c1, c2, c3) \
	cpu_to_le32(AD_BYTE_F | (alpha << AD_ALPHA_C_SHIFT) | \
	(blue << AD_BLUE_C_SHIFT) | (green << AD_GREEN_C_SHIFT) | \
	(red << AD_RED_C_SHIFT) | (c3 << AD_COMP_3_SHIFT) | \
	(c2 << AD_COMP_2_SHIFT) | (c1 << AD_COMP_1_SHIFT) | \
	(c0 << AD_COMP_0_SHIFT) | (size << AD_PIXEL_S_SHIFT))

u32 mpc8610hpcd_get_pixel_format(enum fsl_diu_monitor_port port,
				 unsigned int bits_per_pixel)
{
	static const u32 pixelformat[][3] = {
		{
			MAKE_AD(3, 0, 2, 1, 3, 8, 8, 8, 8),
			MAKE_AD(4, 2, 0, 1, 2, 8, 8, 8, 0),
			MAKE_AD(4, 0, 2, 1, 1, 5, 6, 5, 0)
		},
		{
			MAKE_AD(3, 2, 0, 1, 3, 8, 8, 8, 8),
			MAKE_AD(4, 0, 2, 1, 2, 8, 8, 8, 0),
			MAKE_AD(4, 2, 0, 1, 1, 5, 6, 5, 0)
		},
	};
	unsigned int arch_monitor;

	/* The DVI port is mis-wired on revision 1 of this board. */
	arch_monitor =
		((*pixis_arch == 0x01) && (port == FSL_DIU_PORT_DVI)) ? 0 : 1;

	switch (bits_per_pixel) {
	case 32:
		return pixelformat[arch_monitor][0];
	case 24:
		return pixelformat[arch_monitor][1];
	case 16:
		return pixelformat[arch_monitor][2];
	default:
		pr_err("fsl-diu: unsupported pixel depth %u\n", bits_per_pixel);
		return 0;
	}
}

void mpc8610hpcd_set_gamma_table(enum fsl_diu_monitor_port port,
				 char *gamma_table_base)
{
	int i;
	if (port == FSL_DIU_PORT_DLVDS) {
		for (i = 0; i < 256*3; i++)
			gamma_table_base[i] = (gamma_table_base[i] << 2) |
					 ((gamma_table_base[i] >> 6) & 0x03);
	}
}

#define PX_BRDCFG0_DVISEL	(1 << 3)
#define PX_BRDCFG0_DLINK	(1 << 4)
#define PX_BRDCFG0_DIU_MASK	(PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK)

void mpc8610hpcd_set_monitor_port(enum fsl_diu_monitor_port port)
{
	switch (port) {
	case FSL_DIU_PORT_DVI:
		clrsetbits_8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK,
			     PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK);
		break;
	case FSL_DIU_PORT_LVDS:
		clrsetbits_8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK,
			     PX_BRDCFG0_DLINK);
		break;
	case FSL_DIU_PORT_DLVDS:
		clrbits8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK);
		break;
	}
}

/**
 * mpc8610hpcd_set_pixel_clock: program the DIU's clock
 *
 * @pixclock: the wavelength, in picoseconds, of the clock
 */
void mpc8610hpcd_set_pixel_clock(unsigned int pixclock)
{
	struct device_node *guts_np = NULL;
	struct ccsr_guts __iomem *guts;
	unsigned long freq;
	u64 temp;
	u32 pxclk;

	/* Map the global utilities registers. */
	guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
	if (!guts_np) {
		pr_err("mpc8610hpcd: missing global utilties device node\n");
		return;
	}

	guts = of_iomap(guts_np, 0);
	of_node_put(guts_np);
	if (!guts) {
		pr_err("mpc8610hpcd: could not map global utilties device\n");
		return;
	}

	/* Convert pixclock from a wavelength to a frequency */
	temp = 1000000000000ULL;
	do_div(temp, pixclock);
	freq = temp;

	/*
	 * 'pxclk' is the ratio of the platform clock to the pixel clock.
	 * On the MPC8610, the value programmed into CLKDVDR is the ratio
	 * minus one.  The valid range of values is 2-31.
	 */
	pxclk = DIV_ROUND_CLOSEST(fsl_get_sys_freq(), freq) - 1;
	pxclk = clamp_t(u32, pxclk, 2, 31);

	/* Disable the pixel clock, and set it to non-inverted and no delay */
	clrbits32(&guts->clkdvdr,
		  CLKDVDR_PXCKEN | CLKDVDR_PXCKDLY | CLKDVDR_PXCLK_MASK);

	/* Enable the clock and set the pxclk */
	setbits32(&guts->clkdvdr, CLKDVDR_PXCKEN | (pxclk << 16));

	iounmap(guts);
}

enum fsl_diu_monitor_port
mpc8610hpcd_valid_monitor_port(enum fsl_diu_monitor_port port)
{
	return port;
}

#endif

static void __init mpc86xx_hpcd_setup_arch(void)
{
	struct resource r;
	unsigned char *pixis;

	if (ppc_md.progress)
		ppc_md.progress("mpc86xx_hpcd_setup_arch()", 0);

	fsl_pci_assign_primary();

#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
	diu_ops.get_pixel_format	= mpc8610hpcd_get_pixel_format;
	diu_ops.set_gamma_table		= mpc8610hpcd_set_gamma_table;
	diu_ops.set_monitor_port	= mpc8610hpcd_set_monitor_port;
	diu_ops.set_pixel_clock		= mpc8610hpcd_set_pixel_clock;
	diu_ops.valid_monitor_port	= mpc8610hpcd_valid_monitor_port;
#endif

	pixis_node = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis");
	if (pixis_node) {
		of_address_to_resource(pixis_node, 0, &r);
		of_node_put(pixis_node);
		pixis = ioremap(r.start, 32);
		if (!pixis) {
			printk(KERN_ERR "Err: can't map FPGA cfg register!\n");
			return;
		}
		pixis_bdcfg0 = pixis + 8;
		pixis_arch = pixis + 1;
	} else
		printk(KERN_ERR "Err: "
				"can't find device node 'fsl,fpga-pixis'\n");

	printk("MPC86xx HPCD board from Freescale Semiconductor\n");
}

/*
 * Called very early, device-tree isn't unflattened
 */
static int __init mpc86xx_hpcd_probe(void)
{
	unsigned long root = of_get_flat_dt_root();

	if (of_flat_dt_is_compatible(root, "fsl,MPC8610HPCD"))
		return 1;	/* Looks good */

	return 0;
}

static long __init mpc86xx_time_init(void)
{
	unsigned int temp;

	/* Set the time base to zero */
	mtspr(SPRN_TBWL, 0);
	mtspr(SPRN_TBWU, 0);

	temp = mfspr(SPRN_HID0);
	temp |= HID0_TBEN;
	mtspr(SPRN_HID0, temp);
	asm volatile("isync");

	return 0;
}

define_machine(mpc86xx_hpcd) {
	.name			= "MPC86xx HPCD",
	.probe			= mpc86xx_hpcd_probe,
	.setup_arch		= mpc86xx_hpcd_setup_arch,
	.init_IRQ		= mpc86xx_init_irq,
	.get_irq		= mpic_get_irq,
	.restart		= fsl_rstcr_restart,
	.time_init		= mpc86xx_time_init,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
};