forked from Mirror/GodMode9
987b820c4a
- moved I2C code to the ARM11 (with an ugly hack that MUST be fixed) - reworked the PXI protocol to have lower latencies and remove any potential async support
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
/*
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Written by Wolfvak, specially sublicensed under the GPLv2
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Read LICENSE for more details
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*/
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#pragma once
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#include <types.h>
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#ifdef ARM9
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#define PXI_BASE (0x10008000)
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#define PXI_INIT_SYNC_SET (33)
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#define PXI_INIT_SYNC_WAIT (66)
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#else
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#define PXI_BASE (0x10163000)
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#define IRQ_PXI_RX (83)
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#define PXI_INIT_SYNC_SET (66)
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#define PXI_INIT_SYNC_WAIT (33)
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#endif
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enum {
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PXI_SCREENINIT = 0,
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PXI_BRIGHTNESS,
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PXI_I2C_READ,
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PXI_I2C_WRITE,
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};
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#define PXI_FIFO_LEN (16)
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#define PXI_SYNC_RECV ((vu8*)(PXI_BASE + 0x00))
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#define PXI_SYNC_SEND ((vu8*)(PXI_BASE + 0x01))
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#define PXI_SYNC_IRQ ((vu8*)(PXI_BASE + 0x03))
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#define PXI_CNT ((vu16*)(PXI_BASE + 0x04))
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#define PXI_SEND ((vu32*)(PXI_BASE + 0x08))
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#define PXI_RECV ((vu32*)(PXI_BASE + 0x0C))
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#define PXI_CNT_SEND_FIFO_EMPTY (BIT(0))
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#define PXI_CNT_SEND_FIFO_FULL (BIT(1))
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#define PXI_CNT_SEND_FIFO_EMPTY_IRQ (BIT(2))
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#define PXI_CNT_SEND_FIFO_FLUSH (BIT(3))
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#define PXI_CNT_RECV_FIFO_EMPTY (BIT(8))
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#define PXI_CNT_RECV_FIFO_FULL (BIT(9))
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#define PXI_CNT_RECV_FIFO_AVAIL_IRQ (BIT(10))
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#define PXI_CNT_ERROR_ACK (BIT(14))
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#define PXI_CNT_ENABLE_FIFO (BIT(15))
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#define PXI_SYNC_TRIGGER_MPCORE (BIT(5))
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#define PXI_SYNC_TRIGGER_OLDARM (BIT(6))
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#define PXI_SYNC_ENABLE_IRQ (BIT(7))
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static inline void PXI_SetRemote(u8 msg)
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{
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*PXI_SYNC_SEND = msg;
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}
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static inline u8 PXI_GetRemote(void)
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{
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return *PXI_SYNC_RECV;
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}
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static inline void PXI_WaitRemote(u8 msg)
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{
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while(PXI_GetRemote() != msg);
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}
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static void PXI_Reset(void)
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{
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*PXI_SYNC_IRQ = 0;
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*PXI_CNT = PXI_CNT_SEND_FIFO_FLUSH | PXI_CNT_ENABLE_FIFO;
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for (int i = 0; i < PXI_FIFO_LEN; i++)
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*PXI_RECV;
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*PXI_CNT = 0;
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*PXI_CNT = PXI_CNT_RECV_FIFO_AVAIL_IRQ | PXI_CNT_ENABLE_FIFO;
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}
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static void PXI_Send(u32 w)
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{
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while(*PXI_CNT & PXI_CNT_SEND_FIFO_FULL);
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*PXI_SEND = w;
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}
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static u32 PXI_Recv(void)
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{
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while(*PXI_CNT & PXI_CNT_RECV_FIFO_EMPTY);
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return *PXI_RECV;
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}
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static void PXI_SendArray(const u32 *w, u32 c)
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{
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while(c--) PXI_Send(*(w++));
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}
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static void PXI_RecvArray(u32 *w, u32 c)
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{
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while(c--) *(w++) = PXI_Recv();
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}
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static u32 PXI_DoCMD(u32 cmd, const u32 *args, u32 argc)
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{
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PXI_Send(cmd);
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PXI_SendArray(args, argc);
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return PXI_Recv();
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}
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