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SWIM3: add support for floppy DMA.

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This commit is contained in:
Maxim Poliakovski 2022-02-15 15:53:18 +01:00
parent e91843034b
commit 2525398b6e
2 changed files with 17 additions and 1 deletions
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11
devices/common/dmacore.h
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@ -33,7 +33,16 @@ enum DmaPullResult : int {
class DmaOutChannel {
public:
virtual bool is_active() = 0;
virtual bool is_active() { return true; };
virtual DmaPullResult pull_data(uint32_t req_len, uint32_t *avail_len,
uint8_t **p_data) = 0;
};
// Base class for bidirectional DMA channels.
class DmaBidirChannel {
public:
virtual bool is_active() { return true; };
virtual int push_data(const char* src_ptr, int len) = 0;
virtual DmaPullResult pull_data(uint32_t req_len, uint32_t *avail_len,
uint8_t **p_data) = 0;
};

7
devices/floppy/swim3.h
View File

@ -24,6 +24,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#ifndef SWIM3_H
#define SWIM3_H
#include <devices/common/dmacore.h>
#include <devices/common/hwcomponent.h>
#include <devices/common/hwinterrupt.h>
#include <devices/floppy/superdrive.h>
@ -78,6 +79,10 @@ public:
uint8_t read(uint8_t reg_offset);
void write(uint8_t reg_offset, uint8_t value);
void set_dma_channel(DmaBidirChannel *dma_ch) {
this->dma_ch = dma_ch;
};
protected:
void update_irq();
void start_stepping();
@ -89,6 +94,8 @@ protected:
private:
std::unique_ptr<MacSuperdrive::MacSuperDrive> int_drive;
DmaBidirChannel* dma_ch;
uint8_t setup_reg;
uint8_t mode_reg;
uint8_t error;