Git Repo - qemu.git/blame_incremental

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Commit	Line	Data
	1	/*
	2	* Arm PrimeCell PL050 Keyboard / Mouse Interface
	3	*
	4	* Copyright (c) 2006 CodeSourcery.
	5	* Written by Paul Brook
	6	*
	7	* This code is licenced under the GPL.
	8	*/
	9
	10	#include "vl.h"
	11
	12	typedef struct {
	13	void *dev;
	14	uint32_t base;
	15	uint32_t cr;
	16	uint32_t clk;
	17	uint32_t last;
	18	void *pic;
	19	int pending;
	20	int irq;
	21	int is_mouse;
	22	} pl050_state;
	23
	24	static const unsigned char pl050_id[] =
	25	{ 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
	26
	27	static void pl050_update(void *opaque, int level)
	28	{
	29	pl050_state s = (pl050_state )opaque;
	30	int raise;
	31
	32	s->pending = level;
	33	raise = (s->pending && (s->cr & 0x10) != 0)
	34	\|\| (s->cr & 0x08) != 0;
	35	pic_set_irq_new(s->pic, s->irq, raise);
	36	}
	37
	38	static uint32_t pl050_read(void *opaque, target_phys_addr_t offset)
	39	{
	40	pl050_state s = (pl050_state )opaque;
	41	offset -= s->base;
	42	if (offset >= 0xfe0 && offset < 0x1000)
	43	return pl050_id[(offset - 0xfe0) >> 2];
	44
	45	switch (offset >> 2) {
	46	case 0: /* KMICR */
	47	return s->cr;
	48	case 1: /* KMISTAT */
	49	/* KMIC and KMID bits not implemented. */
	50	if (s->pending) {
	51	return 0x10;
	52	} else {
	53	return 0;
	54	}
	55	case 2: /* KMIDATA */
	56	if (s->pending)
	57	s->last = ps2_read_data(s->dev);
	58	return s->last;
	59	case 3: /* KMICLKDIV */
	60	return s->clk;
	61	case 4: /* KMIIR */
	62	return s->pending \| 2;
	63	default:
	64	cpu_abort (cpu_single_env, "pl050_read: Bad offset %x\n", offset);
	65	return 0;
	66	}
	67	}
	68
	69	static void pl050_write(void *opaque, target_phys_addr_t offset,
	70	uint32_t value)
	71	{
	72	pl050_state s = (pl050_state )opaque;
	73	offset -= s->base;
	74	switch (offset >> 2) {
	75	case 0: /* KMICR */
	76	s->cr = value;
	77	pl050_update(s, s->pending);
	78	/* ??? Need to implement the enable/disable bit. */
	79	break;
	80	case 2: /* KMIDATA */
	81	/* ??? This should toggle the TX interrupt line. */
	82	/* ??? This means kbd/mouse can block each other. */
	83	if (s->is_mouse) {
	84	ps2_write_mouse(s->dev, value);
	85	} else {
	86	ps2_write_keyboard(s->dev, value);
	87	}
	88	break;
	89	case 3: /* KMICLKDIV */
	90	s->clk = value;
	91	return;
	92	default:
	93	cpu_abort (cpu_single_env, "pl050_write: Bad offset %x\n", offset);
	94	}
	95	}
	96	static CPUReadMemoryFunc *pl050_readfn[] = {
	97	pl050_read,
	98	pl050_read,
	99	pl050_read
	100	};
	101
	102	static CPUWriteMemoryFunc *pl050_writefn[] = {
	103	pl050_write,
	104	pl050_write,
	105	pl050_write
	106	};
	107
	108	void pl050_init(uint32_t base, void *pic, int irq, int is_mouse)
	109	{
	110	int iomemtype;
	111	pl050_state *s;
	112
	113	s = (pl050_state *)qemu_mallocz(sizeof(pl050_state));
	114	iomemtype = cpu_register_io_memory(0, pl050_readfn,
	115	pl050_writefn, s);
	116	cpu_register_physical_memory(base, 0x00000fff, iomemtype);
	117	s->base = base;
	118	s->pic = pic;
	119	s->irq = irq;
	120	s->is_mouse = is_mouse;
	121	if (is_mouse)
	122	s->dev = ps2_mouse_init(pl050_update, s);
	123	else
	124	s->dev = ps2_kbd_init(pl050_update, s);
	125	/* ??? Save/restore. */
	126	}
	127