altos: Move cc1111 AES driver to cc1111 directory

[fw/altos] / src / cc1111 / ao_aes.c

diff --git a/src/cc1111/ao_aes.c b/src/cc1111/ao_aes.c
new file mode 100644 (file)
index 0000000..d50fecf
--- /dev/null
+++ b/src/cc1111/ao_aes.c
@@ -0,0 +1,142 @@
+/*
+ * Copyright © 2011 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+
+#if !HAS_AES
+#error Must define HAS_AES 1
+#endif
+
+__xdata uint8_t ao_aes_mutex;
+__xdata uint8_t        ao_aes_done;
+__xdata uint8_t        ao_aes_dma_in, ao_aes_dma_out;
+__xdata uint8_t ao_aes_dma_in_done, ao_aes_dma_out_done;
+__pdata enum ao_aes_mode ao_aes_current_mode;
+
+void
+ao_aes_isr(void) __interrupt 4
+{
+       S0CON = 0;
+       if (ENCCCS & ENCCCS_RDY) {
+               ao_aes_done = 1;
+               ao_wakeup(&ao_aes_done);
+       }
+}
+
+void
+ao_aes_set_mode(enum ao_aes_mode mode)
+{
+       ao_aes_current_mode = mode;
+}
+
+void
+ao_aes_set_key(__xdata uint8_t *in)
+{
+       ao_dma_set_transfer(ao_aes_dma_in,
+                           in,
+                           &ENCDIXADDR,
+                           AO_AES_LEN,
+                           DMA_CFG0_WORDSIZE_8 |
+                           DMA_CFG0_TMODE_SINGLE |
+                           DMA_CFG0_TRIGGER_ENC_DW,
+                           DMA_CFG1_SRCINC_1 |
+                           DMA_CFG1_DESTINC_0 |
+                           DMA_CFG1_PRIORITY_LOW);
+       ao_dma_start(ao_aes_dma_in);
+       ao_aes_done = 0;
+       ENCCCS = ENCCCS_MODE_CBC_MAC |
+               ENCCCS_CMD_LOAD_KEY;
+       ENCCCS |= ENCCCS_START;
+       __critical while (!ao_aes_done)
+               ao_sleep(&ao_aes_done);
+}
+
+void
+ao_aes_zero_iv(void)
+{
+       uint8_t b;
+
+       ENCCCS = ENCCCS_MODE_CBC_MAC | ENCCCS_CMD_LOAD_IV | ENCCCS_START;
+       for (b = 0; b < AO_AES_LEN; b++)
+               ENCDI = 0;
+}
+
+void
+ao_aes_run(__xdata uint8_t *in,
+          __xdata uint8_t *out)
+{
+       uint8_t b;
+       if (in) {
+               ao_dma_set_transfer(ao_aes_dma_in,
+                                   in,
+                                   &ENCDIXADDR,
+                                   AO_AES_LEN,
+                                   DMA_CFG0_WORDSIZE_8 |
+                                   DMA_CFG0_TMODE_SINGLE |
+                                   DMA_CFG0_TRIGGER_ENC_DW,
+                                   DMA_CFG1_SRCINC_1 |
+                                   DMA_CFG1_DESTINC_0 |
+                                   DMA_CFG1_PRIORITY_LOW);
+       }
+       if (out) {
+               ao_dma_set_transfer(ao_aes_dma_out,
+                                   &ENCDOXADDR,
+                                   out,
+                                   AO_AES_LEN,
+                                   DMA_CFG0_WORDSIZE_8 |
+                                   DMA_CFG0_TMODE_SINGLE |
+                                   DMA_CFG0_TRIGGER_ENC_UP,
+                                   DMA_CFG1_SRCINC_0 |
+                                   DMA_CFG1_DESTINC_1 |
+                                   DMA_CFG1_PRIORITY_LOW);
+       }
+       switch (ao_aes_current_mode) {
+       case ao_aes_mode_cbc_mac:
+               if (out)
+                       b = (ENCCCS_MODE_CBC |
+                            ENCCCS_CMD_ENCRYPT);
+               else
+                       b = (ENCCCS_MODE_CBC_MAC |
+                            ENCCCS_CMD_ENCRYPT);
+               break;
+       default:
+               return;
+       }
+       ao_aes_done = 0;
+       if (in)
+               ao_dma_start(ao_aes_dma_in);
+       if (out)
+               ao_dma_start(ao_aes_dma_out);
+       ENCCCS = b;
+       ENCCCS |= ENCCCS_START;
+       if (out) {
+               __critical while (!ao_aes_dma_out_done)
+                       ao_sleep(&ao_aes_dma_out_done);
+       } else {
+               __critical while (!ao_aes_done)
+                       ao_sleep(&ao_aes_done);
+       }
+}
+
+void
+ao_aes_init(void)
+{
+       ao_aes_dma_in = ao_dma_alloc(&ao_aes_dma_in_done);
+       ao_aes_dma_out = ao_dma_alloc(&ao_aes_dma_out_done);
+       S0CON = 0;
+       ENCIE = 1;
+}