gonzui

tkernel_2

driver/tef_em1d/clk/src/em1d512_iic.c - 8.8KB - 338 lines

79:                 WaitUsec(1);
80:                 if ((in_w(addr) & mask) == value) break;
81:         }
114:         /* generate start condition */
115:         out_w(IIC_IICC(ch), in_w(IIC_IICC(ch)) & ~IICC_ACKE);
116:         out_w(IIC_IICC(ch), in_w(IIC_IICC(ch)) |  IICC_STT);
117: 
133:         /* error check */
134:         sts = in_w(IIC_IICSE(ch));
135:         if ((sts & IICSE_ALD) || !(sts & IICSE_ACKD)) {
151:         /* generate stop condition */
152:         out_w(IIC_IICC(ch), in_w(IIC_IICC(ch)) | IICC_SPT);
153: 
177:         /* checking NAK */
178:         sts = in_w(IIC_IICSE(ch));
179:         if (!(sts & IICSE_ACKD)) {
197:         if (cmd & IIC_TOPDATA) {
198:                 out_w(IIC_IICC(ch), in_w(IIC_IICC(ch)) & ~IICC_WTIM);
199:                 out_w(IIC_IICC(ch), in_w(IIC_IICC(ch)) |  IICC_ACKE);
200:         }
202:         /* initiate data receive */
203:         out_w(IIC_IICC(ch), in_w(IIC_IICC(ch)) | IICC_WREL);
204:         er = wait_int();
210:         /* read data */
211:         *cmddata = (cmd & 0xff00) | (in_w(IIC_IIC(ch)) & 0xff);
212:         er = E_OK;
215:         if ((cmd & IIC_LASTDATA) || er < E_OK) {
216:                 out_w(IIC_IICC(ch), in_w(IIC_IICC(ch)) |  IICC_WTIM);
217:                 out_w(IIC_IICC(ch), in_w(IIC_IICC(ch)) & ~IICC_ACKE);
218:                 out_w(IIC_IICC(ch), in_w(IIC_IICC(ch)) | IICC_WREL);
219:                 wait_int();