diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/fec_mxc.c | 177 |
1 files changed, 99 insertions, 78 deletions
diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c index 107cd6e..3b2b995 100644 --- a/drivers/net/fec_mxc.c +++ b/drivers/net/fec_mxc.c @@ -270,49 +270,34 @@ static int fec_tx_task_disable(struct fec_priv *fec) * @param[in] dsize desired size of each receive buffer * @return 0 on success * - * For this task we need additional memory for the data buffers. And each - * data buffer requires some alignment. Thy must be aligned to a specific - * boundary each. + * Init all RX descriptors to default values. */ -static int fec_rbd_init(struct fec_priv *fec, int count, int dsize) +static void fec_rbd_init(struct fec_priv *fec, int count, int dsize) { uint32_t size; + uint8_t *data; int i; /* - * Allocate memory for the buffers. This allocation respects the - * alignment + * Reload the RX descriptors with default values and wipe + * the RX buffers. */ size = roundup(dsize, ARCH_DMA_MINALIGN); for (i = 0; i < count; i++) { - uint32_t data_ptr = readl(&fec->rbd_base[i].data_pointer); - if (data_ptr == 0) { - uint8_t *data = memalign(ARCH_DMA_MINALIGN, - size); - if (!data) { - printf("%s: error allocating rxbuf %d\n", - __func__, i); - goto err; - } - writel((uint32_t)data, &fec->rbd_base[i].data_pointer); - } /* needs allocation */ - writew(FEC_RBD_EMPTY, &fec->rbd_base[i].status); - writew(0, &fec->rbd_base[i].data_length); + data = (uint8_t *)fec->rbd_base[i].data_pointer; + memset(data, 0, dsize); + flush_dcache_range((uint32_t)data, (uint32_t)data + size); + + fec->rbd_base[i].status = FEC_RBD_EMPTY; + fec->rbd_base[i].data_length = 0; } /* Mark the last RBD to close the ring. */ - writew(FEC_RBD_WRAP | FEC_RBD_EMPTY, &fec->rbd_base[i - 1].status); + fec->rbd_base[i - 1].status = FEC_RBD_WRAP | FEC_RBD_EMPTY; fec->rbd_index = 0; - return 0; - -err: - for (; i >= 0; i--) { - uint32_t data_ptr = readl(&fec->rbd_base[i].data_pointer); - free((void *)data_ptr); - } - - return -ENOMEM; + flush_dcache_range((unsigned)fec->rbd_base, + (unsigned)fec->rbd_base + size); } /** @@ -332,10 +317,12 @@ static void fec_tbd_init(struct fec_priv *fec) unsigned addr = (unsigned)fec->tbd_base; unsigned size = roundup(2 * sizeof(struct fec_bd), ARCH_DMA_MINALIGN); - writew(0x0000, &fec->tbd_base[0].status); - writew(FEC_TBD_WRAP, &fec->tbd_base[1].status); + + memset(fec->tbd_base, 0, size); + fec->tbd_base[0].status = 0; + fec->tbd_base[1].status = FEC_TBD_WRAP; fec->tbd_index = 0; - flush_dcache_range(addr, addr+size); + flush_dcache_range(addr, addr + size); } /** @@ -527,51 +514,18 @@ static int fec_init(struct eth_device *dev, bd_t* bd) { struct fec_priv *fec = (struct fec_priv *)dev->priv; uint32_t mib_ptr = (uint32_t)&fec->eth->rmon_t_drop; - uint32_t size; - int i, ret; + int i; /* Initialize MAC address */ fec_set_hwaddr(dev); /* - * Allocate transmit descriptors, there are two in total. This - * allocation respects cache alignment. + * Setup transmit descriptors, there are two in total. */ - if (!fec->tbd_base) { - size = roundup(2 * sizeof(struct fec_bd), - ARCH_DMA_MINALIGN); - fec->tbd_base = memalign(ARCH_DMA_MINALIGN, size); - if (!fec->tbd_base) { - ret = -ENOMEM; - goto err1; - } - memset(fec->tbd_base, 0, size); - fec_tbd_init(fec); - } + fec_tbd_init(fec); - /* - * Allocate receive descriptors. This allocation respects cache - * alignment. - */ - if (!fec->rbd_base) { - size = roundup(FEC_RBD_NUM * sizeof(struct fec_bd), - ARCH_DMA_MINALIGN); - fec->rbd_base = memalign(ARCH_DMA_MINALIGN, size); - if (!fec->rbd_base) { - ret = -ENOMEM; - goto err2; - } - memset(fec->rbd_base, 0, size); - /* - * Initialize RxBD ring - */ - if (fec_rbd_init(fec, FEC_RBD_NUM, FEC_MAX_PKT_SIZE) < 0) { - ret = -ENOMEM; - goto err3; - } - flush_dcache_range((unsigned)fec->rbd_base, - (unsigned)fec->rbd_base + size); - } + /* Setup receive descriptors. */ + fec_rbd_init(fec, FEC_RBD_NUM, FEC_MAX_PKT_SIZE); fec_reg_setup(fec); @@ -608,13 +562,6 @@ static int fec_init(struct eth_device *dev, bd_t* bd) #endif fec_open(dev); return 0; - -err3: - free(fec->rbd_base); -err2: - free(fec->tbd_base); -err1: - return ret; } /** @@ -907,6 +854,74 @@ static void fec_set_dev_name(char *dest, int dev_id) sprintf(dest, (dev_id == -1) ? "FEC" : "FEC%i", dev_id); } +static int fec_alloc_descs(struct fec_priv *fec) +{ + unsigned int size; + int i; + uint8_t *data; + + /* Allocate TX descriptors. */ + size = roundup(2 * sizeof(struct fec_bd), ARCH_DMA_MINALIGN); + fec->tbd_base = memalign(ARCH_DMA_MINALIGN, size); + if (!fec->tbd_base) + goto err_tx; + + /* Allocate RX descriptors. */ + size = roundup(FEC_RBD_NUM * sizeof(struct fec_bd), ARCH_DMA_MINALIGN); + fec->rbd_base = memalign(ARCH_DMA_MINALIGN, size); + if (!fec->rbd_base) + goto err_rx; + + memset(fec->rbd_base, 0, size); + + /* Allocate RX buffers. */ + + /* Maximum RX buffer size. */ + size = roundup(FEC_MAX_PKT_SIZE, ARCH_DMA_MINALIGN); + for (i = 0; i < FEC_RBD_NUM; i++) { + data = memalign(ARCH_DMA_MINALIGN, size); + if (!data) { + printf("%s: error allocating rxbuf %d\n", __func__, i); + goto err_ring; + } + + memset(data, 0, size); + + fec->rbd_base[i].data_pointer = (uint32_t)data; + fec->rbd_base[i].status = FEC_RBD_EMPTY; + fec->rbd_base[i].data_length = 0; + /* Flush the buffer to memory. */ + flush_dcache_range((uint32_t)data, (uint32_t)data + size); + } + + /* Mark the last RBD to close the ring. */ + fec->rbd_base[i - 1].status = FEC_RBD_WRAP | FEC_RBD_EMPTY; + + fec->rbd_index = 0; + fec->tbd_index = 0; + + return 0; + +err_ring: + for (; i >= 0; i--) + free((void *)fec->rbd_base[i].data_pointer); + free(fec->rbd_base); +err_rx: + free(fec->tbd_base); +err_tx: + return -ENOMEM; +} + +static void fec_free_descs(struct fec_priv *fec) +{ + int i; + + for (i = 0; i < FEC_RBD_NUM; i++) + free((void *)fec->rbd_base[i].data_pointer); + free(fec->rbd_base); + free(fec->tbd_base); +} + #ifdef CONFIG_PHYLIB int fec_probe(bd_t *bd, int dev_id, uint32_t base_addr, struct mii_dev *bus, struct phy_device *phydev) @@ -939,6 +954,10 @@ static int fec_probe(bd_t *bd, int dev_id, uint32_t base_addr, memset(edev, 0, sizeof(*edev)); memset(fec, 0, sizeof(*fec)); + ret = fec_alloc_descs(fec); + if (ret) + goto err3; + edev->priv = fec; edev->init = fec_init; edev->send = fec_send; @@ -957,7 +976,7 @@ static int fec_probe(bd_t *bd, int dev_id, uint32_t base_addr, while (readl(&fec->eth->ecntrl) & FEC_ECNTRL_RESET) { if (get_timer(start) > (CONFIG_SYS_HZ * 5)) { printf("FEC MXC: Timeout reseting chip\n"); - goto err3; + goto err4; } udelay(10); } @@ -984,6 +1003,8 @@ static int fec_probe(bd_t *bd, int dev_id, uint32_t base_addr, eth_setenv_enetaddr("ethaddr", ethaddr); } return ret; +err4: + fec_free_descs(fec); err3: free(fec); err2: |