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qemu-patch-raspberry4/hw/display/ssd0323.c
Peter Maydell 213f63df77 Replace uses of FROM_SSI_SLAVE() macro with QOM casts 
The FROM_SSI_SLAVE() macro predates QOM and is used as a typesafe way
to cast from an SSISlave* to the instance struct of a subtype of
TYPE_SSI_SLAVE.  Switch to using the QOM cast macros instead, which
have the same effect (by writing the QOM macros if the types were
previously missing them.)

(The FROM_SSI_SLAVE() macro allows the SSISlave member of the
subtype's struct to be anywhere as long as it is named "ssidev",
whereas a QOM cast macro insists that it is the first thing in the
subtype's struct.  This is true for all the types we convert here.)

This removes all the uses of FROM_SSI_SLAVE() so we can delete the
definition.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20200628142429.17111-18-peter.maydell@linaro.org
2020-07-03 16:59:46 +01:00

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/*
* SSD0323 OLED controller with OSRAM Pictiva 128x64 display.
*
* Copyright (c) 2006-2007 CodeSourcery.
* Written by Paul Brook
*
* This code is licensed under the GPL.
*/
/* The controller can support a variety of different displays, but we only
implement one. Most of the commends relating to brightness and geometry
setup are ignored. */
#include "qemu/osdep.h"
#include "hw/ssi/ssi.h"
#include "migration/vmstate.h"
#include "qemu/module.h"
#include "ui/console.h"
//#define DEBUG_SSD0323 1
#ifdef DEBUG_SSD0323
#define DPRINTF(fmt, ...) \
do { printf("ssd0323: " fmt , ## __VA_ARGS__); } while (0)
#define BADF(fmt, ...) \
do { \
fprintf(stderr, "ssd0323: error: " fmt , ## __VA_ARGS__); abort(); \
} while (0)
#else
#define DPRINTF(fmt, ...) do {} while(0)
#define BADF(fmt, ...) \
do { fprintf(stderr, "ssd0323: error: " fmt , ## __VA_ARGS__);} while (0)
#endif
/* Scaling factor for pixels. */
#define MAGNIFY 4
#define REMAP_SWAP_COLUMN 0x01
#define REMAP_SWAP_NYBBLE 0x02
#define REMAP_VERTICAL 0x04
#define REMAP_SWAP_COM 0x10
#define REMAP_SPLIT_COM 0x40
enum ssd0323_mode
{
SSD0323_CMD,
SSD0323_DATA
};
typedef struct {
SSISlave ssidev;
QemuConsole *con;
uint32_t cmd_len;
int32_t cmd;
int32_t cmd_data[8];
int32_t row;
int32_t row_start;
int32_t row_end;
int32_t col;
int32_t col_start;
int32_t col_end;
int32_t redraw;
int32_t remap;
uint32_t mode;
uint8_t framebuffer[128 * 80 / 2];
} ssd0323_state;
#define TYPE_SSD0323 "ssd0323"
#define SSD0323(obj) OBJECT_CHECK(ssd0323_state, (obj), TYPE_SSD0323)
static uint32_t ssd0323_transfer(SSISlave *dev, uint32_t data)
{
ssd0323_state *s = SSD0323(dev);
switch (s->mode) {
case SSD0323_DATA:
DPRINTF("data 0x%02x\n", data);
s->framebuffer[s->col + s->row * 64] = data;
if (s->remap & REMAP_VERTICAL) {
s->row++;
if (s->row > s->row_end) {
s->row = s->row_start;
s->col++;
}
if (s->col > s->col_end) {
s->col = s->col_start;
}
} else {
s->col++;
if (s->col > s->col_end) {
s->row++;
s->col = s->col_start;
}
if (s->row > s->row_end) {
s->row = s->row_start;
}
}
s->redraw = 1;
break;
case SSD0323_CMD:
DPRINTF("cmd 0x%02x\n", data);
if (s->cmd_len == 0) {
s->cmd = data;
} else {
s->cmd_data[s->cmd_len - 1] = data;
}
s->cmd_len++;
switch (s->cmd) {
#define DATA(x) if (s->cmd_len <= (x)) return 0
case 0x15: /* Set column. */
DATA(2);
s->col = s->col_start = s->cmd_data[0] % 64;
s->col_end = s->cmd_data[1] % 64;
break;
case 0x75: /* Set row. */
DATA(2);
s->row = s->row_start = s->cmd_data[0] % 80;
s->row_end = s->cmd_data[1] % 80;
break;
case 0x81: /* Set contrast */
DATA(1);
break;
case 0x84: case 0x85: case 0x86: /* Max current. */
DATA(0);
break;
case 0xa0: /* Set remapping. */
/* FIXME: Implement this. */
DATA(1);
s->remap = s->cmd_data[0];
break;
case 0xa1: /* Set display start line. */
case 0xa2: /* Set display offset. */
/* FIXME: Implement these. */
DATA(1);
break;
case 0xa4: /* Normal mode. */
case 0xa5: /* All on. */
case 0xa6: /* All off. */
case 0xa7: /* Inverse. */
/* FIXME: Implement these. */
DATA(0);
break;
case 0xa8: /* Set multiplex ratio. */
case 0xad: /* Set DC-DC converter. */
DATA(1);
/* Ignored. Don't care. */
break;
case 0xae: /* Display off. */
case 0xaf: /* Display on. */
DATA(0);
/* TODO: Implement power control. */
break;
case 0xb1: /* Set phase length. */
case 0xb2: /* Set row period. */
case 0xb3: /* Set clock rate. */
case 0xbc: /* Set precharge. */
case 0xbe: /* Set VCOMH. */
case 0xbf: /* Set segment low. */
DATA(1);
/* Ignored. Don't care. */
break;
case 0xb8: /* Set grey scale table. */
/* FIXME: Implement this. */
DATA(8);
break;
case 0xe3: /* NOP. */
DATA(0);
break;
case 0xff: /* Nasty hack because we don't handle chip selects
properly. */
break;
default:
BADF("Unknown command: 0x%x\n", data);
}
s->cmd_len = 0;
return 0;
}
return 0;
}
static void ssd0323_update_display(void *opaque)
{
ssd0323_state *s = (ssd0323_state *)opaque;
DisplaySurface *surface = qemu_console_surface(s->con);
uint8_t *dest;
uint8_t *src;
int x;
int y;
int i;
int line;
char *colors[16];
char colortab[MAGNIFY * 64];
char *p;
int dest_width;
if (!s->redraw)
return;
switch (surface_bits_per_pixel(surface)) {
case 0:
return;
case 15:
dest_width = 2;
break;
case 16:
dest_width = 2;
break;
case 24:
dest_width = 3;
break;
case 32:
dest_width = 4;
break;
default:
BADF("Bad color depth\n");
return;
}
p = colortab;
for (i = 0; i < 16; i++) {
int n;
colors[i] = p;
switch (surface_bits_per_pixel(surface)) {
case 15:
n = i * 2 + (i >> 3);
p[0] = n | (n << 5);
p[1] = (n << 2) | (n >> 3);
break;
case 16:
n = i * 2 + (i >> 3);
p[0] = n | (n << 6) | ((n << 1) & 0x20);
p[1] = (n << 3) | (n >> 2);
break;
case 24:
case 32:
n = (i << 4) | i;
p[0] = p[1] = p[2] = n;
break;
default:
BADF("Bad color depth\n");
return;
}
p += dest_width;
}
/* TODO: Implement row/column remapping. */
dest = surface_data(surface);
for (y = 0; y < 64; y++) {
line = y;
src = s->framebuffer + 64 * line;
for (x = 0; x < 64; x++) {
int val;
val = *src >> 4;
for (i = 0; i < MAGNIFY; i++) {
memcpy(dest, colors[val], dest_width);
dest += dest_width;
}
val = *src & 0xf;
for (i = 0; i < MAGNIFY; i++) {
memcpy(dest, colors[val], dest_width);
dest += dest_width;
}
src++;
}
for (i = 1; i < MAGNIFY; i++) {
memcpy(dest, dest - dest_width * MAGNIFY * 128,
dest_width * 128 * MAGNIFY);
dest += dest_width * 128 * MAGNIFY;
}
}
s->redraw = 0;
dpy_gfx_update(s->con, 0, 0, 128 * MAGNIFY, 64 * MAGNIFY);
}
static void ssd0323_invalidate_display(void * opaque)
{
ssd0323_state *s = (ssd0323_state *)opaque;
s->redraw = 1;
}
/* Command/data input. */
static void ssd0323_cd(void *opaque, int n, int level)
{
ssd0323_state *s = (ssd0323_state *)opaque;
DPRINTF("%s mode\n", level ? "Data" : "Command");
s->mode = level ? SSD0323_DATA : SSD0323_CMD;
}
static int ssd0323_post_load(void *opaque, int version_id)
{
ssd0323_state *s = (ssd0323_state *)opaque;
if (s->cmd_len > ARRAY_SIZE(s->cmd_data)) {
return -EINVAL;
}
if (s->row < 0 || s->row >= 80) {
return -EINVAL;
}
if (s->row_start < 0 || s->row_start >= 80) {
return -EINVAL;
}
if (s->row_end < 0 || s->row_end >= 80) {
return -EINVAL;
}
if (s->col < 0 || s->col >= 64) {
return -EINVAL;
}
if (s->col_start < 0 || s->col_start >= 64) {
return -EINVAL;
}
if (s->col_end < 0 || s->col_end >= 64) {
return -EINVAL;
}
if (s->mode != SSD0323_CMD && s->mode != SSD0323_DATA) {
return -EINVAL;
}
return 0;
}
static const VMStateDescription vmstate_ssd0323 = {
.name = "ssd0323_oled",
.version_id = 2,
.minimum_version_id = 2,
.post_load = ssd0323_post_load,
.fields = (VMStateField []) {
VMSTATE_UINT32(cmd_len, ssd0323_state),
VMSTATE_INT32(cmd, ssd0323_state),
VMSTATE_INT32_ARRAY(cmd_data, ssd0323_state, 8),
VMSTATE_INT32(row, ssd0323_state),
VMSTATE_INT32(row_start, ssd0323_state),
VMSTATE_INT32(row_end, ssd0323_state),
VMSTATE_INT32(col, ssd0323_state),
VMSTATE_INT32(col_start, ssd0323_state),
VMSTATE_INT32(col_end, ssd0323_state),
VMSTATE_INT32(redraw, ssd0323_state),
VMSTATE_INT32(remap, ssd0323_state),
VMSTATE_UINT32(mode, ssd0323_state),
VMSTATE_BUFFER(framebuffer, ssd0323_state),
VMSTATE_SSI_SLAVE(ssidev, ssd0323_state),
VMSTATE_END_OF_LIST()
}
};
static const GraphicHwOps ssd0323_ops = {
.invalidate = ssd0323_invalidate_display,
.gfx_update = ssd0323_update_display,
};
static void ssd0323_realize(SSISlave *d, Error **errp)
{
DeviceState *dev = DEVICE(d);
ssd0323_state *s = SSD0323(d);
s->col_end = 63;
s->row_end = 79;
s->con = graphic_console_init(dev, 0, &ssd0323_ops, s);
qemu_console_resize(s->con, 128 * MAGNIFY, 64 * MAGNIFY);
qdev_init_gpio_in(dev, ssd0323_cd, 1);
}
static void ssd0323_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
k->realize = ssd0323_realize;
k->transfer = ssd0323_transfer;
k->cs_polarity = SSI_CS_HIGH;
dc->vmsd = &vmstate_ssd0323;
}
static const TypeInfo ssd0323_info = {
.name = TYPE_SSD0323,
.parent = TYPE_SSI_SLAVE,
.instance_size = sizeof(ssd0323_state),
.class_init = ssd0323_class_init,
};
static void ssd03232_register_types(void)
{
type_register_static(&ssd0323_info);
}
type_init(ssd03232_register_types)
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