Added missing tegra files.HEADmaster

1 files changed, 155 insertions, 0 deletions

diff --git a/drivers/net/stmmac/dwmac1000_dma.c b/drivers/net/stmmac/dwmac1000_dma.c
new file mode 100644
index 00000000000..3dbeea61908
--- /dev/null
+++ b/drivers/net/stmmac/dwmac1000_dma.c
@@ -0,0 +1,155 @@
+/*******************************************************************************
+  This is the driver for the GMAC on-chip Ethernet controller for ST SoCs.
+  DWC Ether MAC 10/100/1000 Universal version 3.41a  has been used for
+  developing this code.
+
+  This contains the functions to handle the dma.
+
+  Copyright (C) 2007-2009  STMicroelectronics Ltd
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope 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.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+*******************************************************************************/
+
+#include <asm/io.h>
+#include "dwmac1000.h"
+#include "dwmac_dma.h"
+
+static int dwmac1000_dma_init(void __iomem *ioaddr, int pbl, u32 dma_tx,
+                              u32 dma_rx)
+{
+        u32 value = readl(ioaddr + DMA_BUS_MODE);
+        int limit;
+
+        /* DMA SW reset */
+        value |= DMA_BUS_MODE_SFT_RESET;
+        writel(value, ioaddr + DMA_BUS_MODE);
+        limit = 15000;
+        while (limit--) {
+                if (!(readl(ioaddr + DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET))
+                        break;
+        }
+        if (limit < 0)
+                return -EBUSY;
+
+        value = /* DMA_BUS_MODE_FB | */ DMA_BUS_MODE_4PBL |
+            ((pbl << DMA_BUS_MODE_PBL_SHIFT) |
+             (pbl << DMA_BUS_MODE_RPBL_SHIFT));
+
+#ifdef CONFIG_STMMAC_DA
+        value |= DMA_BUS_MODE_DA;       /* Rx has priority over tx */
+#endif
+        writel(value, ioaddr + DMA_BUS_MODE);
+
+        /* Mask interrupts by writing to CSR7 */
+        writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_INTR_ENA);
+
+        /* The base address of the RX/TX descriptor lists must be written into
+         * DMA CSR3 and CSR4, respectively. */
+        writel(dma_tx, ioaddr + DMA_TX_BASE_ADDR);
+        writel(dma_rx, ioaddr + DMA_RCV_BASE_ADDR);
+
+        return 0;
+}
+
+static void dwmac1000_dma_operation_mode(void __iomem *ioaddr, int txmode,
+                                    int rxmode)
+{
+        u32 csr6 = readl(ioaddr + DMA_CONTROL);
+
+        if (txmode == SF_DMA_MODE) {
+                CHIP_DBG(KERN_DEBUG "GMAC: enable TX store and forward mode\n");
+                /* Transmit COE type 2 cannot be done in cut-through mode. */
+                csr6 |= DMA_CONTROL_TSF;
+                /* Operating on second frame increase the performance
+                 * especially when transmit store-and-forward is used.*/
+                csr6 |= DMA_CONTROL_OSF;
+        } else {
+                CHIP_DBG(KERN_DEBUG "GMAC: disabling TX store and forward mode"
+                              " (threshold = %d)\n", txmode);
+                csr6 &= ~DMA_CONTROL_TSF;
+                csr6 &= DMA_CONTROL_TC_TX_MASK;
+                /* Set the transmit threshold */
+                if (txmode <= 32)
+                        csr6 |= DMA_CONTROL_TTC_32;
+                else if (txmode <= 64)
+                        csr6 |= DMA_CONTROL_TTC_64;
+                else if (txmode <= 128)
+                        csr6 |= DMA_CONTROL_TTC_128;
+                else if (txmode <= 192)
+                        csr6 |= DMA_CONTROL_TTC_192;
+                else
+                        csr6 |= DMA_CONTROL_TTC_256;
+        }
+
+        if (rxmode == SF_DMA_MODE) {
+                CHIP_DBG(KERN_DEBUG "GMAC: enable RX store and forward mode\n");
+                csr6 |= DMA_CONTROL_RSF;
+        } else {
+                CHIP_DBG(KERN_DEBUG "GMAC: disabling RX store and forward mode"
+                              " (threshold = %d)\n", rxmode);
+                csr6 &= ~DMA_CONTROL_RSF;
+                csr6 &= DMA_CONTROL_TC_RX_MASK;
+                if (rxmode <= 32)
+                        csr6 |= DMA_CONTROL_RTC_32;
+                else if (rxmode <= 64)
+                        csr6 |= DMA_CONTROL_RTC_64;
+                else if (rxmode <= 96)
+                        csr6 |= DMA_CONTROL_RTC_96;
+                else
+                        csr6 |= DMA_CONTROL_RTC_128;
+        }
+
+        writel(csr6, ioaddr + DMA_CONTROL);
+}
+
+/* Not yet implemented --- no RMON module */
+static void dwmac1000_dma_diagnostic_fr(void *data,
+                  struct stmmac_extra_stats *x, void __iomem *ioaddr)
+{
+        return;
+}
+
+static void dwmac1000_dump_dma_regs(void __iomem *ioaddr)
+{
+        int i;
+        pr_info(" DMA registers\n");
+        for (i = 0; i < 22; i++) {
+                if ((i < 9) || (i > 17)) {
+                        int offset = i * 4;
+                        pr_err("\t Reg No. %d (offset 0x%x): 0x%08x\n", i,
+                               (DMA_BUS_MODE + offset),
+                               readl(ioaddr + DMA_BUS_MODE + offset));
+                }
+        }
+}
+
+const struct stmmac_dma_ops dwmac1000_dma_ops = {
+        .init = dwmac1000_dma_init,
+        .dump_regs = dwmac1000_dump_dma_regs,
+        .dma_mode = dwmac1000_dma_operation_mode,
+        .dma_diagnostic_fr = dwmac1000_dma_diagnostic_fr,
+        .enable_dma_transmission = dwmac_enable_dma_transmission,
+        .enable_dma_irq = dwmac_enable_dma_irq,
+        .disable_dma_irq = dwmac_disable_dma_irq,
+        .start_tx = dwmac_dma_start_tx,
+        .stop_tx = dwmac_dma_stop_tx,
+        .start_rx = dwmac_dma_start_rx,
+        .stop_rx = dwmac_dma_stop_rx,
+        .dma_interrupt = dwmac_dma_interrupt,
+};