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https://github.com/CTCaer/hekate.git
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123 lines
2.2 KiB
C
123 lines
2.2 KiB
C
#include "i2c.h"
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#include "util.h"
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static u32 i2c_addrs[] = { 0x7000C000, 0x7000C400, 0x7000C500, 0x7000C700, 0x7000D000, 0x7000D100 };
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//TODO: memcpy
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static void _i2c_cpy(void *dst, void *src, u32 len)
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{
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u8 *_dst = (u8 *)dst;
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u8 *_src = (u8 *)src;
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for(u32 i = 0; i < len; i++)
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_dst[i] = _src[i];
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}
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static void _i2c_wait(vu32 *base)
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{
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base[0x23] = 0x25;
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for (u32 i = 0; i < 20; i++)
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{
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sleep(1);
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if (!(base[0x23] & 1))
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break;
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}
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}
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static int _i2c_send_pkt(u32 idx, u32 x, u8 *buf, u32 size)
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{
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if (size > 4)
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return 0;
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u32 tmp = 0;
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_i2c_cpy(&tmp, buf, size);
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vu32 *base = (vu32 *)i2c_addrs[idx];
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base[1] = x << 1; //Set x (send mode).
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base[3] = tmp; //Set value.
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base[0] = (2 * size - 2) | 0x2800; //Set size and send mode.
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_i2c_wait(base); //Kick transaction.
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base[0] = base[0] & 0xFFFFFDFF | 0x200;
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while (base[7] & 0x100)
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;
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if (base[7] << 28)
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return 0;
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return 1;
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}
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static int _i2c_recv_pkt(u32 idx, u8 *buf, u32 size, u32 x)
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{
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if (size > 4)
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return 0;
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vu32 *base = (vu32 *)i2c_addrs[idx];
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base[1] = (x << 1) | 1; //Set x (recv mode).
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base[0] = (2 * size - 2) | 0x2840; //Set size and recv mode.
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_i2c_wait(base); //Kick transaction.
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base[0] = base[0] & 0xFFFFFDFF | 0x200;
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while (base[7] & 0x100)
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;
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if (base[7] << 28)
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return 0;
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u32 tmp = base[3]; //Get value.
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_i2c_cpy(buf, &tmp, size);
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return 1;
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}
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void i2c_init(u32 idx)
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{
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vu32 *base = (vu32 *)i2c_addrs[idx];
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base[0x1B] = 0x50001;
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base[0x21] = 0x90003;
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_i2c_wait(base);
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for (u32 i = 0; i < 10; i++)
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{
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sleep(20000);
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if (base[0x1A] & 0x800)
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break;
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}
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vu32 dummy = base[0x22];
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base[0x1A] = base[0x1A];
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}
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u32 i2c_send_buf_small(u32 idx, u32 x, u32 y, u8 *buf, u32 size)
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{
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u8 tmp[4];
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if (size > 3)
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return 0;
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tmp[0] = y;
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_i2c_cpy(tmp + 1, buf, size);
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_i2c_send_pkt(idx, x, tmp, size + 1);
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}
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int i2c_recv_buf_small(u8 *buf, u32 size, u32 idx, u32 x, u32 y)
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{
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int res = _i2c_send_pkt(idx, x, (u8 *)&y, 1);
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if (res)
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res = _i2c_recv_pkt(idx, buf, size, x);
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return res;
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}
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u32 i2c_send_byte(u32 idx, u32 x, u32 y, u8 b)
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{
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i2c_send_buf_small(idx, x, y, &b, 1);
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}
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u8 i2c_recv_byte(u32 idx, u32 x, u32 y)
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{
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u8 tmp;
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i2c_recv_buf_small(&tmp, 1, idx, x, y);
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return tmp;
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}
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