Switch from GPLv2 to GPLv2+

[fw/altos] / src / stm / ao_dma_stm.c

diff --git a/src/stm/ao_dma_stm.c b/src/stm/ao_dma_stm.c
index 785235a8023cfe94512ce35c5a34ef46c7201182..6d77966076a88aefeac0f8a281fa81b5ebe0b662 100644 (file)
--- a/src/stm/ao_dma_stm.c
+++ b/src/stm/ao_dma_stm.c
@@ -3,7 +3,8 @@
  *
  * 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.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -20,12 +21,13 @@
 #define NUM_DMA        7
 
 struct ao_dma_config {
-       void            (*isr)(void);
+       void            (*isr)(int index);
 };
 
 uint8_t ao_dma_done[NUM_DMA];
 
 static struct ao_dma_config ao_dma_config[NUM_DMA];
+static uint8_t ao_dma_allocated[NUM_DMA];
 static uint8_t ao_dma_mutex[NUM_DMA];
 static uint8_t ao_dma_active;
 
@@ -38,7 +40,7 @@ ao_dma_isr(uint8_t index) {
        /* Ack them */
        stm_dma.ifcr = isr;
        if (ao_dma_config[index].isr)
-               (*ao_dma_config[index].isr)();
+               (*ao_dma_config[index].isr)(index);
        else {
                ao_dma_done[index] = 1;
                ao_wakeup(&ao_dma_done[index]);
@@ -60,7 +62,12 @@ ao_dma_set_transfer(uint8_t          index,
                    uint16_t            count,
                    uint32_t            ccr)
 {
-       ao_mutex_get(&ao_dma_mutex[index]);
+       if (ao_dma_allocated[index]) {
+               if (ao_dma_mutex[index])
+                       ao_panic(AO_PANIC_DMA);
+               ao_dma_mutex[index] = 0xff;
+       } else
+               ao_mutex_get(&ao_dma_mutex[index]);
        ao_arch_critical(
                if (ao_dma_active++ == 0)
                        stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_DMA1EN);
@@ -73,7 +80,7 @@ ao_dma_set_transfer(uint8_t           index,
 }
 
 void
-ao_dma_set_isr(uint8_t index, void (*isr)(void))
+ao_dma_set_isr(uint8_t index, void (*isr)(int))
 {
        ao_dma_config[index].isr = isr;
 }
@@ -93,15 +100,54 @@ ao_dma_done_transfer(uint8_t index)
                if (--ao_dma_active == 0)
                        stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_DMA1EN);
                );
-       ao_mutex_put(&ao_dma_mutex[index]);
+       if (ao_dma_allocated[index])
+               ao_dma_mutex[index] = 0;
+       else
+               ao_mutex_put(&ao_dma_mutex[index]);
 }
 
 void
-ao_dma_abort(uint8_t index)
+ao_dma_alloc(uint8_t index)
 {
-       stm_dma.channel[index].ccr &= ~(1 << STM_DMA_CCR_EN);
+       if (ao_dma_allocated[index])
+               ao_panic(AO_PANIC_DMA);
+       ao_dma_allocated[index] = 1;
+}
+
+#if DEBUG
+void
+ao_dma_dump_cmd(void)
+{
+       int i;
+
+       ao_arch_critical(
+               if (ao_dma_active++ == 0)
+                       stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_DMA1EN);
+               );
+       printf ("isr %08x ifcr%08x\n", stm_dma.isr, stm_dma.ifcr);
+       for (i = 0; i < NUM_DMA; i++)
+               printf("%d: done %d allocated %d mutex %2d ccr %04x cndtr %04x cpar %08x cmar %08x isr %08x\n",
+                      i,
+                      ao_dma_done[i],
+                      ao_dma_allocated[i],
+                      ao_dma_mutex[i],
+                      stm_dma.channel[i].ccr,
+                      stm_dma.channel[i].cndtr,
+                      stm_dma.channel[i].cpar,
+                      stm_dma.channel[i].cmar,
+                      ao_dma_config[i].isr);
+       ao_arch_critical(
+               if (--ao_dma_active == 0)
+                       stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_DMA1EN);
+               );
 }
 
+static const struct ao_cmds ao_dma_cmds[] = {
+       { ao_dma_dump_cmd,      "D\0Dump DMA status" },
+       { 0, NULL }
+};
+#endif
+
 void
 ao_dma_init(void)
 {
@@ -110,6 +156,10 @@ ao_dma_init(void)
        for (index = 0; index < STM_NUM_DMA; index++) {
                stm_nvic_set_enable(STM_ISR_DMA1_CHANNEL1_POS + index);
                stm_nvic_set_priority(STM_ISR_DMA1_CHANNEL1_POS + index, 4);
+               ao_dma_allocated[index] = 0;
+               ao_dma_mutex[index] = 0;
        }
-       
+#if DEBUG
+       ao_cmd_register(&ao_dma_cmds[0]);
+#endif
 }