diff options
Diffstat (limited to 'target/linux/ifxmips/files/arch/mips/ifxmips/dma-core.c')
-rw-r--r-- | target/linux/ifxmips/files/arch/mips/ifxmips/dma-core.c | 690 |
1 files changed, 0 insertions, 690 deletions
diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/dma-core.c b/target/linux/ifxmips/files/arch/mips/ifxmips/dma-core.c deleted file mode 100644 index 084b2839a..000000000 --- a/target/linux/ifxmips/files/arch/mips/ifxmips/dma-core.c +++ /dev/null @@ -1,690 +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 <linux/uaccess.h> -#include <linux/errno.h> -#include <linux/io.h> - -#include <ifxmips.h> -#include <ifxmips_irq.h> -#include <ifxmips_dma.h> -#include <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 ifxmips_mask_and_ack_irq(unsigned int irq_nr); -extern void ifxmips_enable_irq(unsigned int irq_nr); -extern void ifxmips_disable_irq(unsigned int irq_nr); - -u64 *g_desc_list; -struct dma_device_info dma_devs[MAX_DMA_DEVICE_NUM]; -struct dma_channel_info dma_chan[MAX_DMA_CHANNEL_NUM]; - -static const char *global_device_name[MAX_DMA_DEVICE_NUM] = - { "PPE", "DEU", "SPI", "SDIO", "MCTRL0", "MCTRL1" }; - -struct 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} -}; - -struct dma_chan_map *chan_map = default_dma_map; -volatile u32 g_ifxmips_dma_int_status; -volatile int g_ifxmips_dma_in_process; /* 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 = kmalloc(len * sizeof(u8), GFP_KERNEL); - - *byte_offset = 0; - - return buffer; -} - -void common_buffer_free(u8 *dataptr, void *opt) -{ - kfree(dataptr); -} - -void enable_ch_irq(struct dma_channel_info *pCh) -{ - int chan_no = (int)(pCh - dma_chan); - unsigned long flag; - - local_irq_save(flag); - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - ifxmips_w32(0x4a, IFXMIPS_DMA_CIE); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_IRNEN) | (1 << chan_no), IFXMIPS_DMA_IRNEN); - local_irq_restore(flag); - ifxmips_enable_irq(pCh->irq); -} - -void disable_ch_irq(struct dma_channel_info *pCh) -{ - unsigned long flag; - int chan_no = (int) (pCh - dma_chan); - - local_irq_save(flag); - g_ifxmips_dma_int_status &= ~(1 << chan_no); - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - ifxmips_w32(0, IFXMIPS_DMA_CIE); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_IRNEN) & ~(1 << chan_no), IFXMIPS_DMA_IRNEN); - local_irq_restore(flag); - ifxmips_mask_and_ack_irq(pCh->irq); -} - -void open_chan(struct dma_channel_info *pCh) -{ - unsigned long flag; - int chan_no = (int)(pCh - dma_chan); - - local_irq_save(flag); - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CCTRL) | 1, IFXMIPS_DMA_CCTRL); - if (pCh->dir == IFXMIPS_DMA_RX) - enable_ch_irq(pCh); - local_irq_restore(flag); -} - -void close_chan(struct dma_channel_info *pCh) -{ - unsigned long flag; - int chan_no = (int) (pCh - dma_chan); - - local_irq_save(flag); - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL); - disable_ch_irq(pCh); - local_irq_restore(flag); -} - -void reset_chan(struct dma_channel_info *pCh) -{ - int chan_no = (int) (pCh - dma_chan); - - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CCTRL) | 2, IFXMIPS_DMA_CCTRL); -} - -void rx_chan_intr_handler(int chan_no) -{ - struct dma_device_info *pDev = (struct dma_device_info *)dma_chan[chan_no].dma_dev; - struct dma_channel_info *pCh = &dma_chan[chan_no]; - struct rx_desc *rx_desc_p; - int tmp; - unsigned long 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 = ifxmips_r32(IFXMIPS_DMA_CS); - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CIS) | 0x7e, IFXMIPS_DMA_CIS); - ifxmips_w32(tmp, IFXMIPS_DMA_CS); - g_ifxmips_dma_int_status &= ~(1 << chan_no); - local_irq_restore(flag); - ifxmips_enable_irq(dma_chan[chan_no].irq); - } -} - -inline void tx_chan_intr_handler(int chan_no) -{ - struct dma_device_info *pDev = (struct dma_device_info *)dma_chan[chan_no].dma_dev; - struct dma_channel_info *pCh = &dma_chan[chan_no]; - int tmp; - unsigned long flag; - - local_irq_save(flag); - tmp = ifxmips_r32(IFXMIPS_DMA_CS); - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CIS) | 0x7e, IFXMIPS_DMA_CIS); - ifxmips_w32(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; - unsigned long 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) -{ - struct dma_channel_info *pCh; - int chan_no = 0; - int tmp; - - pCh = (struct dma_channel_info *)dev_id; - chan_no = (int)(pCh - dma_chan); - if (chan_no < 0 || chan_no > 19) - BUG(); - - tmp = ifxmips_r32(IFXMIPS_DMA_IRNEN); - ifxmips_w32(0, IFXMIPS_DMA_IRNEN); - g_ifxmips_dma_int_status |= 1 << chan_no; - ifxmips_w32(tmp, IFXMIPS_DMA_IRNEN); - ifxmips_mask_and_ack_irq(irq); - - if (!g_ifxmips_dma_in_process) { - g_ifxmips_dma_in_process = 1; - tasklet_schedule(&dma_tasklet); - } - - return IRQ_HANDLED; -} - -struct 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]; -} -EXPORT_SYMBOL(dma_device_reserve); - -void dma_device_release(struct dma_device_info *dev) -{ - dev->reserved = 0; -} -EXPORT_SYMBOL(dma_device_release); - -void dma_device_register(struct dma_device_info *dev) -{ - int i, j; - int chan_no = 0; - u8 *buffer; - int byte_offset; - unsigned long flag; - struct dma_device_info *pDev; - struct 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); - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - /* check if the descriptor length is changed */ - if (ifxmips_r32(IFXMIPS_DMA_CDLEN) != pCh->desc_len) - ifxmips_w32(pCh->desc_len, IFXMIPS_DMA_CDLEN); - - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CCTRL) | 2, IFXMIPS_DMA_CCTRL); - while (ifxmips_r32(IFXMIPS_DMA_CCTRL) & 2) - ; - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_IRNEN) | (1 << chan_no), IFXMIPS_DMA_IRNEN); - ifxmips_w32(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 = (struct 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); - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - /* check if the descriptor length is changed */ - if (ifxmips_r32(IFXMIPS_DMA_CDLEN) != pCh->desc_len) - ifxmips_w32(pCh->desc_len, IFXMIPS_DMA_CDLEN); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CCTRL) | 2, IFXMIPS_DMA_CCTRL); - while (ifxmips_r32(IFXMIPS_DMA_CCTRL) & 2) - ; - ifxmips_w32(0x0a, IFXMIPS_DMA_CIE); /* fix me, should enable all the interrupts here? */ - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_IRNEN) | (1 << chan_no), IFXMIPS_DMA_IRNEN); - ifxmips_w32(0x30000, IFXMIPS_DMA_CCTRL); - local_irq_restore(flag); - ifxmips_enable_irq(dma_chan[chan_no].irq); - } - } -} -EXPORT_SYMBOL(dma_device_register); - -void dma_device_unregister(struct dma_device_info *dev) -{ - int i, j; - int chan_no; - struct dma_channel_info *pCh; - struct rx_desc *rx_desc_p; - struct tx_desc *tx_desc_p; - unsigned long 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); - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - pCh->curr_desc = 0; - pCh->prev_desc = 0; - pCh->control = IFXMIPS_DMA_CH_OFF; - ifxmips_w32(0, IFXMIPS_DMA_CIE); /* fix me, should disable all the interrupts here? */ - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_IRNEN) & ~(1 << chan_no), IFXMIPS_DMA_IRNEN); /* disable interrupts */ - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL); - while (ifxmips_r32(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); - ifxmips_disable_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; - - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - ifxmips_w32(0, IFXMIPS_DMA_CIE); /* fix me, should disable all the interrupts here? */ - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_IRNEN) & ~(1 << chan_no), IFXMIPS_DMA_IRNEN); /* disable interrupts */ - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CCTRL) & ~1, IFXMIPS_DMA_CCTRL); - while (ifxmips_r32(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]); - } - } - } -} -EXPORT_SYMBOL(dma_device_unregister); - -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; - struct 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; -} -EXPORT_SYMBOL(dma_device_read); - -int dma_device_write(struct dma_device_info *dma_dev, u8 *dataptr, int len, void *opt) -{ - unsigned long flag; - u32 tmp, byte_offset; - struct 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 - (struct 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); - } - - ifxmips_w32(chan_no, IFXMIPS_DMA_CS); - tmp = ifxmips_r32(IFXMIPS_DMA_CCTRL); - - if (!(tmp & 1)) - pCh->open(pCh); - - local_irq_restore(flag); - - return len; -} -EXPORT_SYMBOL(dma_device_write); - -int map_dma_chan(struct 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, IRQF_DISABLED, map[i].dev_name, (void *)&dma_chan[i]); - if (result) { - printk(KERN_WARNING "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) { - ifxmips_w32(0, IFXMIPS_DMA_PS); - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_PCTRL) | ((0xf << 8) | (1 << 6)), IFXMIPS_DMA_PCTRL); /*enable dma drop */ - } - - if (i == 1) { - ifxmips_w32(1, IFXMIPS_DMA_PS); - ifxmips_w32(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(KERN_WARNING "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 */ - ifxmips_w32(ifxmips_r32(IFXMIPS_DMA_CTRL) | 1, IFXMIPS_DMA_CTRL); - - /* disable all interrupts */ - ifxmips_w32(0, IFXMIPS_DMA_IRNEN); - - for (i = 0; i < MAX_DMA_CHANNEL_NUM; i++) { - ifxmips_w32(i, IFXMIPS_DMA_CS); - ifxmips_w32(0x2, IFXMIPS_DMA_CCTRL); - ifxmips_w32(0x80000040, IFXMIPS_DMA_CPOLL); - ifxmips_w32(ifxmips_r32(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(KERN_WARNING "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; - - ifxmips_w32(i, IFXMIPS_DMA_CS); - ifxmips_w32((u32)CPHYSADDR(dma_chan[i].desc_base), IFXMIPS_DMA_CDBA); - ifxmips_w32(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); -} - -MODULE_LICENSE("GPL"); |