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Diffstat (limited to 'target/linux/ifxmips/files/arch/mips/danube/dma-core.c')
-rw-r--r--target/linux/ifxmips/files/arch/mips/danube/dma-core.c758
1 files changed, 0 insertions, 758 deletions
diff --git a/target/linux/ifxmips/files/arch/mips/danube/dma-core.c b/target/linux/ifxmips/files/arch/mips/danube/dma-core.c
deleted file mode 100644
index f2bbb3446a..0000000000
--- a/target/linux/ifxmips/files/arch/mips/danube/dma-core.c
+++ /dev/null
@@ -1,758 +0,0 @@
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/fs.h>
-#include <linux/errno.h>
-#include <linux/stat.h>
-#include <linux/mm.h>
-#include <linux/tty.h>
-#include <linux/selection.h>
-#include <linux/kmod.h>
-#include <linux/vmalloc.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <asm/uaccess.h>
-#include <linux/errno.h>
-#include <asm/io.h>
-
-#include <asm/ifxmips/ifxmips.h>
-#include <asm/ifxmips/ifxmips_irq.h>
-#include <asm/ifxmips/ifxmips_dma.h>
-#include <asm/ifxmips/ifxmips_pmu.h>
-
-/*25 descriptors for each dma channel,4096/8/20=25.xx*/
-#define IFXMIPS_DMA_DESCRIPTOR_OFFSET 25
-
-#define MAX_DMA_DEVICE_NUM 6 /*max ports connecting to dma */
-#define MAX_DMA_CHANNEL_NUM 20 /*max dma channels */
-#define DMA_INT_BUDGET 100 /*budget for interrupt handling */
-#define DMA_POLL_COUNTER 4 /*fix me, set the correct counter value here! */
-
-extern void mask_and_ack_ifxmips_irq (unsigned int irq_nr);
-extern void enable_ifxmips_irq (unsigned int irq_nr);
-extern void disable_ifxmips_irq (unsigned int irq_nr);
-
-u64 *g_desc_list;
-_dma_device_info dma_devs[MAX_DMA_DEVICE_NUM];
-_dma_channel_info dma_chan[MAX_DMA_CHANNEL_NUM];
-
-char global_device_name[MAX_DMA_DEVICE_NUM][20] =
- { {"PPE"}, {"DEU"}, {"SPI"}, {"SDIO"}, {"MCTRL0"}, {"MCTRL1"} };
-
-_dma_chan_map default_dma_map[MAX_DMA_CHANNEL_NUM] = {
- {"PPE", IFXMIPS_DMA_RX, 0, IFXMIPS_DMA_CH0_INT, 0},
- {"PPE", IFXMIPS_DMA_TX, 0, IFXMIPS_DMA_CH1_INT, 0},
- {"PPE", IFXMIPS_DMA_RX, 1, IFXMIPS_DMA_CH2_INT, 1},
- {"PPE", IFXMIPS_DMA_TX, 1, IFXMIPS_DMA_CH3_INT, 1},
- {"PPE", IFXMIPS_DMA_RX, 2, IFXMIPS_DMA_CH4_INT, 2},
- {"PPE", IFXMIPS_DMA_TX, 2, IFXMIPS_DMA_CH5_INT, 2},
- {"PPE", IFXMIPS_DMA_RX, 3, IFXMIPS_DMA_CH6_INT, 3},
- {"PPE", IFXMIPS_DMA_TX, 3, IFXMIPS_DMA_CH7_INT, 3},
- {"DEU", IFXMIPS_DMA_RX, 0, IFXMIPS_DMA_CH8_INT, 0},
- {"DEU", IFXMIPS_DMA_TX, 0, IFXMIPS_DMA_CH9_INT, 0},
- {"DEU", IFXMIPS_DMA_RX, 1, IFXMIPS_DMA_CH10_INT, 1},
- {"DEU", IFXMIPS_DMA_TX, 1, IFXMIPS_DMA_CH11_INT, 1},
- {"SPI", IFXMIPS_DMA_RX, 0, IFXMIPS_DMA_CH12_INT, 0},
- {"SPI", IFXMIPS_DMA_TX, 0, IFXMIPS_DMA_CH13_INT, 0},
- {"SDIO", IFXMIPS_DMA_RX, 0, IFXMIPS_DMA_CH14_INT, 0},
- {"SDIO", IFXMIPS_DMA_TX, 0, IFXMIPS_DMA_CH15_INT, 0},
- {"MCTRL0", IFXMIPS_DMA_RX, 0, IFXMIPS_DMA_CH16_INT, 0},
- {"MCTRL0", IFXMIPS_DMA_TX, 0, IFXMIPS_DMA_CH17_INT, 0},
- {"MCTRL1", IFXMIPS_DMA_RX, 1, IFXMIPS_DMA_CH18_INT, 1},
- {"MCTRL1", IFXMIPS_DMA_TX, 1, IFXMIPS_DMA_CH19_INT, 1}
-};
-
-_dma_chan_map *chan_map = default_dma_map;
-volatile u32 g_ifxmips_dma_int_status = 0;
-volatile int g_ifxmips_dma_in_process = 0;/*0=not in process,1=in process*/
-
-void do_dma_tasklet (unsigned long);
-DECLARE_TASKLET (dma_tasklet, do_dma_tasklet, 0);
-
-u8*
-common_buffer_alloc (int len, int *byte_offset, void **opt)
-{
- u8 *buffer = (u8 *) kmalloc (len * sizeof (u8), GFP_KERNEL);
-
- *byte_offset = 0;
-
- return buffer;
-}
-
-void
-common_buffer_free (u8 *dataptr, void *opt)
-{
- if (dataptr)
- kfree(dataptr);
-}
-
-void
-enable_ch_irq (_dma_channel_info *pCh)
-{
- int chan_no = (int)(pCh - dma_chan);
- int flag;
-
- local_irq_save(flag);
- writel(chan_no, IFXMIPS_DMA_CS);
- writel(0x4a, IFXMIPS_DMA_CIE);
- writel(readl(IFXMIPS_DMA_IRNEN) | (1 << chan_no), IFXMIPS_DMA_IRNEN);
- local_irq_restore(flag);
- enable_ifxmips_irq(pCh->irq);
-}
-
-void
-disable_ch_irq (_dma_channel_info *pCh)
-{
- int flag;
- int chan_no = (int) (pCh - dma_chan);
-
- local_irq_save(flag);
- g_ifxmips_dma_int_status &= ~(1 << chan_no);
- writel(chan_no, IFXMIPS_DMA_CS);
- writel(0, IFXMIPS_DMA_CIE);
- writel(readl(IFXMIPS_DMA_IRNEN) & ~(1 << chan_no), IFXMIPS_DMA_IRNEN);
- local_irq_restore(flag);
- mask_and_ack_ifxmips_irq(pCh->irq);
-}
-
-void
-open_chan (_dma_channel_info *pCh)
-{
- int flag;
- int chan_no = (int)(pCh - dma_chan);
-
- local_irq_save(flag);
- writel(chan_no, IFXMIPS_DMA_CS);
- writel(readl(IFXMIPS_DMA_CCTRL) | 1, IFXMIPS_DMA_CCTRL);
- if(pCh->dir == IFXMIPS_DMA_RX)
- enable_ch_irq(pCh);
- local_irq_restore(flag);
-}
-
-void
-close_chan(_dma_channel_info *pCh)
-{
- int flag;
- int chan_no = (int) (pCh - dma_chan);
-
- local_irq_save(flag);
- writel(chan_no, IFXMIPS_DMA_CS);
- writel(readl(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL);
- disable_ch_irq(pCh);
- local_irq_restore(flag);
-}
-
-void
-reset_chan (_dma_channel_info *pCh)
-{
- int chan_no = (int) (pCh - dma_chan);
-
- writel(chan_no, IFXMIPS_DMA_CS);
- writel(readl(IFXMIPS_DMA_CCTRL) | 2, IFXMIPS_DMA_CCTRL);
-}
-
-void
-rx_chan_intr_handler (int chan_no)
-{
- _dma_device_info *pDev = (_dma_device_info *)dma_chan[chan_no].dma_dev;
- _dma_channel_info *pCh = &dma_chan[chan_no];
- struct rx_desc *rx_desc_p;
- int tmp;
- int flag;
-
- /*handle command complete interrupt */
- rx_desc_p = (struct rx_desc*)pCh->desc_base + pCh->curr_desc;
- if (rx_desc_p->status.field.OWN == CPU_OWN
- && rx_desc_p->status.field.C
- && rx_desc_p->status.field.data_length < 1536){
- /*Every thing is correct, then we inform the upper layer */
- pDev->current_rx_chan = pCh->rel_chan_no;
- if(pDev->intr_handler)
- pDev->intr_handler(pDev, RCV_INT);
- pCh->weight--;
- } else {
- local_irq_save(flag);
- tmp = readl(IFXMIPS_DMA_CS);
- writel(chan_no, IFXMIPS_DMA_CS);
- writel(readl(IFXMIPS_DMA_CIS) | 0x7e, IFXMIPS_DMA_CIS);
- writel(tmp, IFXMIPS_DMA_CS);
- g_ifxmips_dma_int_status &= ~(1 << chan_no);
- local_irq_restore(flag);
- enable_ifxmips_irq(dma_chan[chan_no].irq);
- }
-}
-
-inline void
-tx_chan_intr_handler (int chan_no)
-{
- _dma_device_info *pDev = (_dma_device_info*)dma_chan[chan_no].dma_dev;
- _dma_channel_info *pCh = &dma_chan[chan_no];
- int tmp;
- int flag;
-
- local_irq_save(flag);
- tmp = readl(IFXMIPS_DMA_CS);
- writel(chan_no, IFXMIPS_DMA_CS);
- writel(readl(IFXMIPS_DMA_CIS) | 0x7e, IFXMIPS_DMA_CIS);
- writel(tmp, IFXMIPS_DMA_CS);
- g_ifxmips_dma_int_status &= ~(1 << chan_no);
- local_irq_restore(flag);
- pDev->current_tx_chan = pCh->rel_chan_no;
- if (pDev->intr_handler)
- pDev->intr_handler(pDev, TRANSMIT_CPT_INT);
-}
-
-void
-do_dma_tasklet (unsigned long unused)
-{
- int i;
- int chan_no = 0;
- int budget = DMA_INT_BUDGET;
- int weight = 0;
- int flag;
-
- while (g_ifxmips_dma_int_status)
- {
- if (budget-- < 0)
- {
- tasklet_schedule(&dma_tasklet);
- return;
- }
- chan_no = -1;
- weight = 0;
- for (i = 0; i < MAX_DMA_CHANNEL_NUM; i++)
- {
- if ((g_ifxmips_dma_int_status & (1 << i)) && dma_chan[i].weight > 0)
- {
- if (dma_chan[i].weight > weight)
- {
- chan_no = i;
- weight = dma_chan[chan_no].weight;
- }
- }
- }
-
- if (chan_no >= 0)
- {
- if (chan_map[chan_no].dir == IFXMIPS_DMA_RX)
- rx_chan_intr_handler(chan_no);
- else
- tx_chan_intr_handler(chan_no);
- } else {
- for (i = 0; i < MAX_DMA_CHANNEL_NUM; i++)
- {
- dma_chan[i].weight = dma_chan[i].default_weight;
- }
- }
- }
-
- local_irq_save(flag);
- g_ifxmips_dma_in_process = 0;
- if (g_ifxmips_dma_int_status)
- {
- g_ifxmips_dma_in_process = 1;
- tasklet_schedule(&dma_tasklet);
- }
- local_irq_restore(flag);
-}
-
-irqreturn_t
-dma_interrupt (int irq, void *dev_id)
-{
- _dma_channel_info *pCh;
- int chan_no = 0;
- int tmp;
-
- pCh = (_dma_channel_info*)dev_id;
- chan_no = (int)(pCh - dma_chan);
- if (chan_no < 0 || chan_no > 19)
- BUG();
-
- tmp = readl(IFXMIPS_DMA_IRNEN);
- writel(0, IFXMIPS_DMA_IRNEN);
- g_ifxmips_dma_int_status |= 1 << chan_no;
- writel(tmp, IFXMIPS_DMA_IRNEN);
- mask_and_ack_ifxmips_irq(irq);
-
- if (!g_ifxmips_dma_in_process)
- {
- g_ifxmips_dma_in_process = 1;
- tasklet_schedule(&dma_tasklet);
- }
-
- return IRQ_HANDLED;
-}
-
-_dma_device_info*
-dma_device_reserve (char *dev_name)
-{
- int i;
-
- for (i = 0; i < MAX_DMA_DEVICE_NUM; i++)
- {
- if (strcmp(dev_name, dma_devs[i].device_name) == 0)
- {
- if (dma_devs[i].reserved)
- return NULL;
- dma_devs[i].reserved = 1;
- break;
- }
- }
-
- return &dma_devs[i];
-}
-
-void
-dma_device_release (_dma_device_info *dev)
-{
- dev->reserved = 0;
-}
-
-void
-dma_device_register(_dma_device_info *dev)
-{
- int i, j;
- int chan_no = 0;
- u8 *buffer;
- int byte_offset;
- int flag;
- _dma_device_info *pDev;
- _dma_channel_info *pCh;
- struct rx_desc *rx_desc_p;
- struct tx_desc *tx_desc_p;
-
- for (i = 0; i < dev->max_tx_chan_num; i++)
- {
- pCh = dev->tx_chan[i];
- if (pCh->control == IFXMIPS_DMA_CH_ON)
- {
- chan_no = (int)(pCh - dma_chan);
- for (j = 0; j < pCh->desc_len; j++)
- {
- tx_desc_p = (struct tx_desc*)pCh->desc_base + j;
- memset(tx_desc_p, 0, sizeof(struct tx_desc));
- }
- local_irq_save(flag);
- writel(chan_no, IFXMIPS_DMA_CS);
- /*check if the descriptor length is changed */
- if (readl(IFXMIPS_DMA_CDLEN) != pCh->desc_len)
- writel(pCh->desc_len, IFXMIPS_DMA_CDLEN);
-
- writel(readl(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL);
- writel(readl(IFXMIPS_DMA_CCTRL) | 2, IFXMIPS_DMA_CCTRL);
- while (readl(IFXMIPS_DMA_CCTRL) & 2){};
- writel(readl(IFXMIPS_DMA_IRNEN) | (1 << chan_no), IFXMIPS_DMA_IRNEN);
- writel(0x30100, IFXMIPS_DMA_CCTRL); /*reset and enable channel,enable channel later */
- local_irq_restore(flag);
- }
- }
-
- for (i = 0; i < dev->max_rx_chan_num; i++)
- {
- pCh = dev->rx_chan[i];
- if (pCh->control == IFXMIPS_DMA_CH_ON)
- {
- chan_no = (int)(pCh - dma_chan);
-
- for (j = 0; j < pCh->desc_len; j++)
- {
- rx_desc_p = (struct rx_desc*)pCh->desc_base + j;
- pDev = (_dma_device_info*)(pCh->dma_dev);
- buffer = pDev->buffer_alloc(pCh->packet_size, &byte_offset, (void*)&(pCh->opt[j]));
- if (!buffer)
- break;
-
- dma_cache_inv((unsigned long) buffer, pCh->packet_size);
-
- rx_desc_p->Data_Pointer = (u32)CPHYSADDR((u32)buffer);
- rx_desc_p->status.word = 0;
- rx_desc_p->status.field.byte_offset = byte_offset;
- rx_desc_p->status.field.OWN = DMA_OWN;
- rx_desc_p->status.field.data_length = pCh->packet_size;
- }
-
- local_irq_save(flag);
- writel(chan_no, IFXMIPS_DMA_CS);
- /*check if the descriptor length is changed */
- if (readl(IFXMIPS_DMA_CDLEN) != pCh->desc_len)
- writel(pCh->desc_len, IFXMIPS_DMA_CDLEN);
- writel(readl(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL);
- writel(readl(IFXMIPS_DMA_CCTRL) | 2, IFXMIPS_DMA_CCTRL);
- while (readl(IFXMIPS_DMA_CCTRL) & 2){};
- writel(0x0a, IFXMIPS_DMA_CIE); /*fix me, should enable all the interrupts here? */
- writel(readl(IFXMIPS_DMA_IRNEN) | (1 << chan_no), IFXMIPS_DMA_IRNEN);
- writel(0x30000, IFXMIPS_DMA_CCTRL);
- local_irq_restore(flag);
- enable_ifxmips_irq(dma_chan[chan_no].irq);
- }
- }
-}
-
-void
-dma_device_unregister (_dma_device_info *dev)
-{
- int i, j;
- int chan_no;
- _dma_channel_info *pCh;
- struct rx_desc *rx_desc_p;
- struct tx_desc *tx_desc_p;
- int flag;
-
- for (i = 0; i < dev->max_tx_chan_num; i++)
- {
- pCh = dev->tx_chan[i];
- if (pCh->control == IFXMIPS_DMA_CH_ON)
- {
- chan_no = (int)(dev->tx_chan[i] - dma_chan);
- local_irq_save (flag);
- writel(chan_no, IFXMIPS_DMA_CS);
- pCh->curr_desc = 0;
- pCh->prev_desc = 0;
- pCh->control = IFXMIPS_DMA_CH_OFF;
- writel(0, IFXMIPS_DMA_CIE); /*fix me, should disable all the interrupts here? */
- writel(readl(IFXMIPS_DMA_IRNEN) & ~(1 << chan_no), IFXMIPS_DMA_IRNEN); /*disable interrupts */
- writel(readl(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL);
- while (readl(IFXMIPS_DMA_CCTRL) & 1) {};
- local_irq_restore (flag);
-
- for (j = 0; j < pCh->desc_len; j++)
- {
- tx_desc_p = (struct tx_desc*)pCh->desc_base + j;
- if ((tx_desc_p->status.field.OWN == CPU_OWN && tx_desc_p->status.field.C)
- || (tx_desc_p->status.field.OWN == DMA_OWN && tx_desc_p->status.field.data_length > 0))
- {
- dev->buffer_free ((u8 *) __va (tx_desc_p->Data_Pointer), (void*)pCh->opt[j]);
- }
- tx_desc_p->status.field.OWN = CPU_OWN;
- memset (tx_desc_p, 0, sizeof (struct tx_desc));
- }
- //TODO should free buffer that is not transferred by dma
- }
- }
-
- for (i = 0; i < dev->max_rx_chan_num; i++)
- {
- pCh = dev->rx_chan[i];
- chan_no = (int)(dev->rx_chan[i] - dma_chan);
- disable_ifxmips_irq(pCh->irq);
-
- local_irq_save(flag);
- g_ifxmips_dma_int_status &= ~(1 << chan_no);
- pCh->curr_desc = 0;
- pCh->prev_desc = 0;
- pCh->control = IFXMIPS_DMA_CH_OFF;
-
- writel(chan_no, IFXMIPS_DMA_CS);
- writel(0, IFXMIPS_DMA_CIE); /*fix me, should disable all the interrupts here? */
- writel(readl(IFXMIPS_DMA_IRNEN) & ~(1 << chan_no), IFXMIPS_DMA_IRNEN); /*disable interrupts */
- writel(readl(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL);
- while (readl(IFXMIPS_DMA_CCTRL) & 1) {};
-
- local_irq_restore (flag);
- for (j = 0; j < pCh->desc_len; j++)
- {
- rx_desc_p = (struct rx_desc *) pCh->desc_base + j;
- if ((rx_desc_p->status.field.OWN == CPU_OWN
- && rx_desc_p->status.field.C)
- || (rx_desc_p->status.field.OWN == DMA_OWN
- && rx_desc_p->status.field.data_length > 0)) {
- dev->buffer_free ((u8 *)
- __va (rx_desc_p->
- Data_Pointer),
- (void *) pCh->opt[j]);
- }
- }
- }
-}
-
-int
-dma_device_read (struct dma_device_info *dma_dev, u8 ** dataptr, void **opt)
-{
- u8 *buf;
- int len;
- int byte_offset = 0;
- void *p = NULL;
- _dma_channel_info *pCh = dma_dev->rx_chan[dma_dev->current_rx_chan];
- struct rx_desc *rx_desc_p;
-
- /*get the rx data first */
- rx_desc_p = (struct rx_desc *) pCh->desc_base + pCh->curr_desc;
- if (!(rx_desc_p->status.field.OWN == CPU_OWN && rx_desc_p->status.field.C))
- {
- return 0;
- }
-
- buf = (u8 *) __va (rx_desc_p->Data_Pointer);
- *(u32*)dataptr = (u32)buf;
- len = rx_desc_p->status.field.data_length;
-
- if (opt)
- {
- *(int*)opt = (int)pCh->opt[pCh->curr_desc];
- }
-
- /*replace with a new allocated buffer */
- buf = dma_dev->buffer_alloc(pCh->packet_size, &byte_offset, &p);
-
- if (buf)
- {
- dma_cache_inv ((unsigned long) buf,
- pCh->packet_size);
- pCh->opt[pCh->curr_desc] = p;
- wmb ();
-
- rx_desc_p->Data_Pointer = (u32) CPHYSADDR ((u32) buf);
- rx_desc_p->status.word = (DMA_OWN << 31) | ((byte_offset) << 23) | pCh->packet_size;
- wmb ();
- } else {
- *(u32 *) dataptr = 0;
- if (opt)
- *(int *) opt = 0;
- len = 0;
- }
-
- /*increase the curr_desc pointer */
- pCh->curr_desc++;
- if (pCh->curr_desc == pCh->desc_len)
- pCh->curr_desc = 0;
-
- return len;
-}
-
-int
-dma_device_write (struct dma_device_info *dma_dev, u8 * dataptr, int len, void *opt)
-{
- int flag;
- u32 tmp, byte_offset;
- _dma_channel_info *pCh;
- int chan_no;
- struct tx_desc *tx_desc_p;
- local_irq_save (flag);
-
- pCh = dma_dev->tx_chan[dma_dev->current_tx_chan];
- chan_no = (int)(pCh - (_dma_channel_info *) dma_chan);
-
- tx_desc_p = (struct tx_desc*)pCh->desc_base + pCh->prev_desc;
- while (tx_desc_p->status.field.OWN == CPU_OWN && tx_desc_p->status.field.C)
- {
- dma_dev->buffer_free((u8 *) __va (tx_desc_p->Data_Pointer), pCh->opt[pCh->prev_desc]);
- memset(tx_desc_p, 0, sizeof (struct tx_desc));
- pCh->prev_desc = (pCh->prev_desc + 1) % (pCh->desc_len);
- tx_desc_p = (struct tx_desc*)pCh->desc_base + pCh->prev_desc;
- }
- tx_desc_p = (struct tx_desc*)pCh->desc_base + pCh->curr_desc;
- /*Check whether this descriptor is available */
- if (tx_desc_p->status.field.OWN == DMA_OWN || tx_desc_p->status.field.C)
- {
- /*if not , the tell the upper layer device */
- dma_dev->intr_handler (dma_dev, TX_BUF_FULL_INT);
- local_irq_restore(flag);
- printk (KERN_INFO "%s %d: failed to write!\n", __func__, __LINE__);
-
- return 0;
- }
- pCh->opt[pCh->curr_desc] = opt;
- /*byte offset----to adjust the starting address of the data buffer, should be multiple of the burst length. */
- byte_offset = ((u32) CPHYSADDR ((u32) dataptr)) % ((dma_dev->tx_burst_len) * 4);
- dma_cache_wback ((unsigned long) dataptr, len);
- wmb ();
- tx_desc_p->Data_Pointer = (u32) CPHYSADDR ((u32) dataptr) - byte_offset;
- wmb ();
- tx_desc_p->status.word = (DMA_OWN << 31) | DMA_DESC_SOP_SET | DMA_DESC_EOP_SET | ((byte_offset) << 23) | len;
- wmb ();
-
- pCh->curr_desc++;
- if (pCh->curr_desc == pCh->desc_len)
- pCh->curr_desc = 0;
-
- /*Check whether this descriptor is available */
- tx_desc_p = (struct tx_desc *) pCh->desc_base + pCh->curr_desc;
- if (tx_desc_p->status.field.OWN == DMA_OWN)
- {
- /*if not , the tell the upper layer device */
- dma_dev->intr_handler (dma_dev, TX_BUF_FULL_INT);
- }
-
- writel(chan_no, IFXMIPS_DMA_CS);
- tmp = readl(IFXMIPS_DMA_CCTRL);
-
- if (!(tmp & 1))
- pCh->open (pCh);
-
- local_irq_restore (flag);
-
- return len;
-}
-
-int
-map_dma_chan(_dma_chan_map *map)
-{
- int i, j;
- int result;
-
- for (i = 0; i < MAX_DMA_DEVICE_NUM; i++)
- {
- strcpy(dma_devs[i].device_name, global_device_name[i]);
- }
-
- for (i = 0; i < MAX_DMA_CHANNEL_NUM; i++)
- {
- dma_chan[i].irq = map[i].irq;
- result = request_irq(dma_chan[i].irq, dma_interrupt, SA_INTERRUPT, "dma-core", (void*)&dma_chan[i]);
- if (result)
- {
- printk("error, cannot get dma_irq!\n");
- free_irq(dma_chan[i].irq, (void *) &dma_interrupt);
-
- return -EFAULT;
- }
- }
-
- for (i = 0; i < MAX_DMA_DEVICE_NUM; i++)
- {
- dma_devs[i].num_tx_chan = 0; /*set default tx channel number to be one */
- dma_devs[i].num_rx_chan = 0; /*set default rx channel number to be one */
- dma_devs[i].max_rx_chan_num = 0;
- dma_devs[i].max_tx_chan_num = 0;
- dma_devs[i].buffer_alloc = &common_buffer_alloc;
- dma_devs[i].buffer_free = &common_buffer_free;
- dma_devs[i].intr_handler = NULL;
- dma_devs[i].tx_burst_len = 4;
- dma_devs[i].rx_burst_len = 4;
- if (i == 0)
- {
- writel(0, IFXMIPS_DMA_PS);
- writel(readl(IFXMIPS_DMA_PCTRL) | ((0xf << 8) | (1 << 6)), IFXMIPS_DMA_PCTRL); /*enable dma drop */
- }
-
- if (i == 1)
- {
- writel(1, IFXMIPS_DMA_PS);
- writel(0x14, IFXMIPS_DMA_PCTRL); /*deu port setting */
- }
-
- for (j = 0; j < MAX_DMA_CHANNEL_NUM; j++)
- {
- dma_chan[j].byte_offset = 0;
- dma_chan[j].open = &open_chan;
- dma_chan[j].close = &close_chan;
- dma_chan[j].reset = &reset_chan;
- dma_chan[j].enable_irq = &enable_ch_irq;
- dma_chan[j].disable_irq = &disable_ch_irq;
- dma_chan[j].rel_chan_no = map[j].rel_chan_no;
- dma_chan[j].control = IFXMIPS_DMA_CH_OFF;
- dma_chan[j].default_weight = IFXMIPS_DMA_CH_DEFAULT_WEIGHT;
- dma_chan[j].weight = dma_chan[j].default_weight;
- dma_chan[j].curr_desc = 0;
- dma_chan[j].prev_desc = 0;
- }
-
- for (j = 0; j < MAX_DMA_CHANNEL_NUM; j++)
- {
- if (strcmp(dma_devs[i].device_name, map[j].dev_name) == 0)
- {
- if (map[j].dir == IFXMIPS_DMA_RX)
- {
- dma_chan[j].dir = IFXMIPS_DMA_RX;
- dma_devs[i].max_rx_chan_num++;
- dma_devs[i].rx_chan[dma_devs[i].max_rx_chan_num - 1] = &dma_chan[j];
- dma_devs[i].rx_chan[dma_devs[i].max_rx_chan_num - 1]->pri = map[j].pri;
- dma_chan[j].dma_dev = (void*)&dma_devs[i];
- } else if(map[j].dir == IFXMIPS_DMA_TX)
- { /*TX direction */
- dma_chan[j].dir = IFXMIPS_DMA_TX;
- dma_devs[i].max_tx_chan_num++;
- dma_devs[i].tx_chan[dma_devs[i].max_tx_chan_num - 1] = &dma_chan[j];
- dma_devs[i].tx_chan[dma_devs[i].max_tx_chan_num - 1]->pri = map[j].pri;
- dma_chan[j].dma_dev = (void*)&dma_devs[i];
- } else {
- printk ("WRONG DMA MAP!\n");
- }
- }
- }
- }
-
- return 0;
-}
-
-void
-dma_chip_init(void)
-{
- int i;
-
- // enable DMA from PMU
- ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_DMA);
-
- // reset DMA
- writel(readl(IFXMIPS_DMA_CTRL) | 1, IFXMIPS_DMA_CTRL);
-
- // diable all interrupts
- writel(0, IFXMIPS_DMA_IRNEN);
-
- for (i = 0; i < MAX_DMA_CHANNEL_NUM; i++)
- {
- writel(i, IFXMIPS_DMA_CS);
- writel(0x2, IFXMIPS_DMA_CCTRL);
- writel(0x80000040, IFXMIPS_DMA_CPOLL);
- writel(readl(IFXMIPS_DMA_CCTRL) & ~0x1, IFXMIPS_DMA_CCTRL);
-
- }
-}
-
-int
-ifxmips_dma_init (void)
-{
- int i;
-
- dma_chip_init();
- if (map_dma_chan(default_dma_map))
- BUG();
-
- g_desc_list = (u64*)KSEG1ADDR(__get_free_page(GFP_DMA));
-
- if (g_desc_list == NULL)
- {
- printk("no memory for desriptor\n");
- return -ENOMEM;
- }
-
- memset(g_desc_list, 0, PAGE_SIZE);
-
- for (i = 0; i < MAX_DMA_CHANNEL_NUM; i++)
- {
- dma_chan[i].desc_base = (u32)g_desc_list + i * IFXMIPS_DMA_DESCRIPTOR_OFFSET * 8;
- dma_chan[i].curr_desc = 0;
- dma_chan[i].desc_len = IFXMIPS_DMA_DESCRIPTOR_OFFSET;
-
- writel(i, IFXMIPS_DMA_CS);
- writel((u32)CPHYSADDR(dma_chan[i].desc_base), IFXMIPS_DMA_CDBA);
- writel(dma_chan[i].desc_len, IFXMIPS_DMA_CDLEN);
- }
-
- return 0;
-}
-
-arch_initcall(ifxmips_dma_init);
-
-void
-dma_cleanup(void)
-{
- int i;
-
- free_page(KSEG0ADDR((unsigned long) g_desc_list));
- for (i = 0; i < MAX_DMA_CHANNEL_NUM; i++)
- free_irq(dma_chan[i].irq, (void*)&dma_interrupt);
-}
-
-EXPORT_SYMBOL (dma_device_reserve);
-EXPORT_SYMBOL (dma_device_release);
-EXPORT_SYMBOL (dma_device_register);
-EXPORT_SYMBOL (dma_device_unregister);
-EXPORT_SYMBOL (dma_device_read);
-EXPORT_SYMBOL (dma_device_write);
-
-MODULE_LICENSE ("GPL");