symbian-qemu-0.9.1-12/qemu-symbian-svp/hw/tc58128.c
author Mike Kinghan <mikek@symbian.org>
Wed, 04 Aug 2010 10:56:22 +0100
branchGCC_SURGE
changeset 91 07b904f40417
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Provisional fix for bug 3508 - Persistent storage support breaks Linux compatibility. Enables libnvmemmory.so to be built and dynamically linked on Linux and rom boot reports persistent storage image created OK, but ROM then crashes.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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#include <assert.h>
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#include "hw.h"
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#include "sh.h"
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#include "sysemu.h"
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#define CE1  0x0100
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#define CE2  0x0200
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#define RE   0x0400
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#define WE   0x0800
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#define ALE  0x1000
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#define CLE  0x2000
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#define RDY1 0x4000
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#define RDY2 0x8000
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#define RDY(n) ((n) == 0 ? RDY1 : RDY2)
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typedef enum { WAIT, READ1, READ2, READ3 } state_t;
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typedef struct {
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    uint8_t *flash_contents;
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    state_t state;
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    uint32_t address;
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    uint8_t address_cycle;
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} tc58128_dev;
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static tc58128_dev tc58128_devs[2];
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#define FLASH_SIZE (16*1024*1024)
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static void init_dev(tc58128_dev * dev, const char *filename)
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{
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    int ret, blocks;
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    dev->state = WAIT;
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    dev->flash_contents = qemu_mallocz(FLASH_SIZE);
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    memset(dev->flash_contents, 0xff, FLASH_SIZE);
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    if (!dev->flash_contents) {
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	fprintf(stderr, "could not alloc memory for flash\n");
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	exit(1);
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    }
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    if (filename) {
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	/* Load flash image skipping the first block */
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	ret = load_image(filename, dev->flash_contents + 528 * 32);
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	if (ret < 0) {
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	    fprintf(stderr, "ret=%d\n", ret);
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	    fprintf(stderr, "qemu: could not load flash image %s\n",
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		    filename);
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	    exit(1);
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	} else {
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	    /* Build first block with number of blocks */
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	    blocks = (ret + 528 * 32 - 1) / (528 * 32);
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	    dev->flash_contents[0] = blocks & 0xff;
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	    dev->flash_contents[1] = (blocks >> 8) & 0xff;
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	    dev->flash_contents[2] = (blocks >> 16) & 0xff;
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	    dev->flash_contents[3] = (blocks >> 24) & 0xff;
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	    fprintf(stderr, "loaded %d bytes for %s into flash\n", ret,
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		    filename);
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	}
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    }
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}
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static void handle_command(tc58128_dev * dev, uint8_t command)
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{
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    switch (command) {
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    case 0xff:
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	fprintf(stderr, "reset flash device\n");
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	dev->state = WAIT;
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	break;
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    case 0x00:
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	fprintf(stderr, "read mode 1\n");
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	dev->state = READ1;
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	dev->address_cycle = 0;
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	break;
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    case 0x01:
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	fprintf(stderr, "read mode 2\n");
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	dev->state = READ2;
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	dev->address_cycle = 0;
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	break;
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    case 0x50:
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	fprintf(stderr, "read mode 3\n");
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	dev->state = READ3;
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	dev->address_cycle = 0;
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	break;
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    default:
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	fprintf(stderr, "unknown flash command 0x%02x\n", command);
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	assert(0);
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    }
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}
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static void handle_address(tc58128_dev * dev, uint8_t data)
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{
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    switch (dev->state) {
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    case READ1:
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    case READ2:
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    case READ3:
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	switch (dev->address_cycle) {
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	case 0:
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	    dev->address = data;
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	    if (dev->state == READ2)
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		dev->address |= 0x100;
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	    else if (dev->state == READ3)
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		dev->address |= 0x200;
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	    break;
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	case 1:
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	    dev->address += data * 528 * 0x100;
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	    break;
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	case 2:
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	    dev->address += data * 528;
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	    fprintf(stderr, "address pointer in flash: 0x%08x\n",
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		    dev->address);
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	    break;
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	default:
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	    /* Invalid data */
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	    assert(0);
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	}
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	dev->address_cycle++;
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	break;
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    default:
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   118
	assert(0);
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    }
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}
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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static uint8_t handle_read(tc58128_dev * dev)
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{
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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#if 0
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    if (dev->address % 0x100000 == 0)
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	fprintf(stderr, "reading flash at address 0x%08x\n", dev->address);
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#endif
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    return dev->flash_contents[dev->address++];
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}
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/* We never mark the device as busy, so interrupts cannot be triggered
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   XXXXX */
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static int tc58128_cb(uint16_t porta, uint16_t portb,
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                      uint16_t * periph_pdtra, uint16_t * periph_portadir,
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                      uint16_t * periph_pdtrb, uint16_t * periph_portbdir)
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{
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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    int dev;
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    if ((porta & CE1) == 0)
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	dev = 0;
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    else if ((porta & CE2) == 0)
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	dev = 1;
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    else
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	return 0;		/* No device selected */
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   146
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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    if ((porta & RE) && (porta & WE)) {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	/* Nothing to do, assert ready and return to input state */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	*periph_portadir &= 0xff00;
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	*periph_portadir |= RDY(dev);
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   151
	*periph_pdtra |= RDY(dev);
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	return 1;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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    }
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   154
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   155
    if (porta & CLE) {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   156
	/* Command */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   157
	assert((porta & WE) == 0);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   158
	handle_command(&tc58128_devs[dev], porta & 0x00ff);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   159
    } else if (porta & ALE) {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   160
	assert((porta & WE) == 0);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   161
	handle_address(&tc58128_devs[dev], porta & 0x00ff);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   162
    } else if ((porta & RE) == 0) {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   163
	*periph_portadir |= 0x00ff;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   164
	*periph_pdtra &= 0xff00;
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   165
	*periph_pdtra |= handle_read(&tc58128_devs[dev]);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   166
    } else {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   167
	assert(0);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   168
    }
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   169
    return 1;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff changeset
   170
}
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   171
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   172
static sh7750_io_device tc58128 = {
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   173
    RE | WE,			/* Port A triggers */
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   174
    0,				/* Port B triggers */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   175
    tc58128_cb			/* Callback */
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff changeset
   176
};
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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   177
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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int tc58128_init(struct SH7750State *s, const char *zone1, const char *zone2)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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diff changeset
   179
{
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   180
    init_dev(&tc58128_devs[0], zone1);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   181
    init_dev(&tc58128_devs[1], zone2);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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   182
    return sh7750_register_io_device(s, &tc58128);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff changeset
   183
}