| /* |
| * SSD0303 OLED controller with OSRAM Pictiva 96x16 display. |
| * |
| * Copyright (c) 2006-2007 CodeSourcery. |
| * Written by Paul Brook |
| * |
| * This code is licenced 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 "i2c.h" |
| #include "console.h" |
| |
| //#define DEBUG_SSD0303 1 |
| |
| #ifdef DEBUG_SSD0303 |
| #define DPRINTF(fmt, ...) \ |
| do { printf("ssd0303: " fmt , ## __VA_ARGS__); } while (0) |
| #define BADF(fmt, ...) \ |
| do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__); exit(1);} while (0) |
| #else |
| #define DPRINTF(fmt, ...) do {} while(0) |
| #define BADF(fmt, ...) \ |
| do { fprintf(stderr, "ssd0303: error: " fmt , ## __VA_ARGS__);} while (0) |
| #endif |
| |
| /* Scaling factor for pixels. */ |
| #define MAGNIFY 4 |
| |
| enum ssd0303_mode |
| { |
| SSD0303_IDLE, |
| SSD0303_DATA, |
| SSD0303_CMD |
| }; |
| |
| enum ssd0303_cmd { |
| SSD0303_CMD_NONE, |
| SSD0303_CMD_SKIP1 |
| }; |
| |
| typedef struct { |
| i2c_slave i2c; |
| DisplayState *ds; |
| int row; |
| int col; |
| int start_line; |
| int mirror; |
| int flash; |
| int enabled; |
| int inverse; |
| int redraw; |
| enum ssd0303_mode mode; |
| enum ssd0303_cmd cmd_state; |
| uint8_t framebuffer[132*8]; |
| } ssd0303_state; |
| |
| static int ssd0303_recv(i2c_slave *i2c) |
| { |
| BADF("Reads not implemented\n"); |
| return -1; |
| } |
| |
| static int ssd0303_send(i2c_slave *i2c, uint8_t data) |
| { |
| ssd0303_state *s = (ssd0303_state *)i2c; |
| enum ssd0303_cmd old_cmd_state; |
| switch (s->mode) { |
| case SSD0303_IDLE: |
| DPRINTF("byte 0x%02x\n", data); |
| if (data == 0x80) |
| s->mode = SSD0303_CMD; |
| else if (data == 0x40) |
| s->mode = SSD0303_DATA; |
| else |
| BADF("Unexpected byte 0x%x\n", data); |
| break; |
| case SSD0303_DATA: |
| DPRINTF("data 0x%02x\n", data); |
| if (s->col < 132) { |
| s->framebuffer[s->col + s->row * 132] = data; |
| s->col++; |
| s->redraw = 1; |
| } |
| break; |
| case SSD0303_CMD: |
| old_cmd_state = s->cmd_state; |
| s->cmd_state = SSD0303_CMD_NONE; |
| switch (old_cmd_state) { |
| case SSD0303_CMD_NONE: |
| DPRINTF("cmd 0x%02x\n", data); |
| s->mode = SSD0303_IDLE; |
| switch (data) { |
| case 0x00 ... 0x0f: /* Set lower colum address. */ |
| s->col = (s->col & 0xf0) | (data & 0xf); |
| break; |
| case 0x10 ... 0x20: /* Set higher column address. */ |
| s->col = (s->col & 0x0f) | ((data & 0xf) << 4); |
| break; |
| case 0x40 ... 0x7f: /* Set start line. */ |
| s->start_line = 0; |
| break; |
| case 0x81: /* Set contrast (Ignored). */ |
| s->cmd_state = SSD0303_CMD_SKIP1; |
| break; |
| case 0xa0: /* Mirror off. */ |
| s->mirror = 0; |
| break; |
| case 0xa1: /* Mirror off. */ |
| s->mirror = 1; |
| break; |
| case 0xa4: /* Entire display off. */ |
| s->flash = 0; |
| break; |
| case 0xa5: /* Entire display on. */ |
| s->flash = 1; |
| break; |
| case 0xa6: /* Inverse off. */ |
| s->inverse = 0; |
| break; |
| case 0xa7: /* Inverse on. */ |
| s->inverse = 1; |
| break; |
| case 0xa8: /* Set multipled ratio (Ignored). */ |
| s->cmd_state = SSD0303_CMD_SKIP1; |
| break; |
| case 0xad: /* DC-DC power control. */ |
| s->cmd_state = SSD0303_CMD_SKIP1; |
| break; |
| case 0xae: /* Display off. */ |
| s->enabled = 0; |
| break; |
| case 0xaf: /* Display on. */ |
| s->enabled = 1; |
| break; |
| case 0xb0 ... 0xbf: /* Set Page address. */ |
| s->row = data & 7; |
| break; |
| case 0xc0 ... 0xc8: /* Set COM output direction (Ignored). */ |
| break; |
| case 0xd3: /* Set display offset (Ignored). */ |
| s->cmd_state = SSD0303_CMD_SKIP1; |
| break; |
| case 0xd5: /* Set display clock (Ignored). */ |
| s->cmd_state = SSD0303_CMD_SKIP1; |
| break; |
| case 0xd8: /* Set color and power mode (Ignored). */ |
| s->cmd_state = SSD0303_CMD_SKIP1; |
| break; |
| case 0xd9: /* Set pre-charge period (Ignored). */ |
| s->cmd_state = SSD0303_CMD_SKIP1; |
| break; |
| case 0xda: /* Set COM pin configuration (Ignored). */ |
| s->cmd_state = SSD0303_CMD_SKIP1; |
| break; |
| case 0xdb: /* Set VCOM dselect level (Ignored). */ |
| s->cmd_state = SSD0303_CMD_SKIP1; |
| break; |
| case 0xe3: /* no-op. */ |
| break; |
| default: |
| BADF("Unknown command: 0x%x\n", data); |
| } |
| break; |
| case SSD0303_CMD_SKIP1: |
| DPRINTF("skip 0x%02x\n", data); |
| break; |
| } |
| break; |
| } |
| return 0; |
| } |
| |
| static void ssd0303_event(i2c_slave *i2c, enum i2c_event event) |
| { |
| ssd0303_state *s = (ssd0303_state *)i2c; |
| switch (event) { |
| case I2C_FINISH: |
| s->mode = SSD0303_IDLE; |
| break; |
| case I2C_START_RECV: |
| case I2C_START_SEND: |
| case I2C_NACK: |
| /* Nothing to do. */ |
| break; |
| } |
| } |
| |
| static void ssd0303_update_display(void *opaque) |
| { |
| ssd0303_state *s = (ssd0303_state *)opaque; |
| uint8_t *dest; |
| uint8_t *src; |
| int x; |
| int y; |
| int line; |
| char *colors[2]; |
| char colortab[MAGNIFY * 8]; |
| int dest_width; |
| uint8_t mask; |
| |
| if (!s->redraw) |
| return; |
| |
| switch (ds_get_bits_per_pixel(s->ds)) { |
| 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; |
| } |
| dest_width *= MAGNIFY; |
| memset(colortab, 0xff, dest_width); |
| memset(colortab + dest_width, 0, dest_width); |
| if (s->flash) { |
| colors[0] = colortab; |
| colors[1] = colortab; |
| } else if (s->inverse) { |
| colors[0] = colortab; |
| colors[1] = colortab + dest_width; |
| } else { |
| colors[0] = colortab + dest_width; |
| colors[1] = colortab; |
| } |
| dest = ds_get_data(s->ds); |
| for (y = 0; y < 16; y++) { |
| line = (y + s->start_line) & 63; |
| src = s->framebuffer + 132 * (line >> 3) + 36; |
| mask = 1 << (line & 7); |
| for (x = 0; x < 96; x++) { |
| memcpy(dest, colors[(*src & mask) != 0], dest_width); |
| dest += dest_width; |
| src++; |
| } |
| for (x = 1; x < MAGNIFY; x++) { |
| memcpy(dest, dest - dest_width * 96, dest_width * 96); |
| dest += dest_width * 96; |
| } |
| } |
| s->redraw = 0; |
| dpy_update(s->ds, 0, 0, 96 * MAGNIFY, 16 * MAGNIFY); |
| } |
| |
| static void ssd0303_invalidate_display(void * opaque) |
| { |
| ssd0303_state *s = (ssd0303_state *)opaque; |
| s->redraw = 1; |
| } |
| |
| static const VMStateDescription vmstate_ssd0303 = { |
| .name = "ssd0303_oled", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .minimum_version_id_old = 1, |
| .fields = (VMStateField []) { |
| VMSTATE_INT32(row, ssd0303_state), |
| VMSTATE_INT32(col, ssd0303_state), |
| VMSTATE_INT32(start_line, ssd0303_state), |
| VMSTATE_INT32(mirror, ssd0303_state), |
| VMSTATE_INT32(flash, ssd0303_state), |
| VMSTATE_INT32(enabled, ssd0303_state), |
| VMSTATE_INT32(inverse, ssd0303_state), |
| VMSTATE_INT32(redraw, ssd0303_state), |
| VMSTATE_UINT32(mode, ssd0303_state), |
| VMSTATE_UINT32(cmd_state, ssd0303_state), |
| VMSTATE_BUFFER(framebuffer, ssd0303_state), |
| VMSTATE_I2C_SLAVE(i2c, ssd0303_state), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static int ssd0303_init(i2c_slave *i2c) |
| { |
| ssd0303_state *s = FROM_I2C_SLAVE(ssd0303_state, i2c); |
| |
| s->ds = graphic_console_init(ssd0303_update_display, |
| ssd0303_invalidate_display, |
| NULL, NULL, s); |
| qemu_console_resize(s->ds, 96 * MAGNIFY, 16 * MAGNIFY); |
| vmstate_register(-1, &vmstate_ssd0303, s); |
| return 0; |
| } |
| |
| static I2CSlaveInfo ssd0303_info = { |
| .qdev.name = "ssd0303", |
| .qdev.size = sizeof(ssd0303_state), |
| .init = ssd0303_init, |
| .event = ssd0303_event, |
| .recv = ssd0303_recv, |
| .send = ssd0303_send |
| }; |
| |
| static void ssd0303_register_devices(void) |
| { |
| i2c_register_slave(&ssd0303_info); |
| } |
| |
| device_init(ssd0303_register_devices) |
