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Commit afea3278 authored by Olof Johansson's avatar Olof Johansson
Browse files

pasemi_mac: Move RX/TX section enablement to dma_lib 



Also stop both rx and tx sections before changing the configuration of
the dma device during init.

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
Acked-by: default avatarJeff Garzik <jgarzik@pobox.com>
parent 6a2d322e

arch/powerpc/platforms/pasemi/dma_lib.c

+30 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

 */



#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/pci.h>
@@ -410,6 +411,7 @@ int pasemi_dma_init(void) 
	struct resource res;

	struct device_node *dn;

	int i, intf, err = 0;

	unsigned long timeout;

	u32 tmp;



	if (!machine_is(pasemi))
@@ -478,6 +480,34 @@ int pasemi_dma_init(void) 
	for (i = 0; i < MAX_RXCH; i++)

		__set_bit(i, rxch_free);



	timeout = jiffies + HZ;

	pasemi_write_dma_reg(PAS_DMA_COM_RXCMD, 0);

	while (pasemi_read_dma_reg(PAS_DMA_COM_RXSTA) & 1) {

		if (time_after(jiffies, timeout)) {

			pr_warning("Warning: Could not disable RX section\n");

			break;

		}

	}



	timeout = jiffies + HZ;

	pasemi_write_dma_reg(PAS_DMA_COM_TXCMD, 0);

	while (pasemi_read_dma_reg(PAS_DMA_COM_TXSTA) & 1) {

		if (time_after(jiffies, timeout)) {

			pr_warning("Warning: Could not disable TX section\n");

			break;

		}

	}



	/* setup resource allocations for the different DMA sections */

	tmp = pasemi_read_dma_reg(PAS_DMA_COM_CFG);

	pasemi_write_dma_reg(PAS_DMA_COM_CFG, tmp | 0x18000000);



	/* enable tx section */

	pasemi_write_dma_reg(PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);



	/* enable rx section */

	pasemi_write_dma_reg(PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);



	printk(KERN_INFO "PA Semi PWRficient DMA library initialized "

		"(%d tx, %d rx channels)\n", num_txch, num_rxch);

drivers/net/pasemi_mac.c

+0 −6
Original line number Diff line number Diff line
@@ -1043,12 +1043,6 @@ static int pasemi_mac_open(struct net_device *dev) 
	unsigned int flags;

	int ret;



	/* enable rx section */

	write_dma_reg(PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);



	/* enable tx section */

	write_dma_reg(PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);



	flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |

		PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |

		PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);

include/asm-powerpc/pasemi_dma.h

+6 −1
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2006 PA Semi, Inc

 * Copyright (C) 2006-2008 PA Semi, Inc

 *

 * Hardware register layout and descriptor formats for the on-board

 * DMA engine on PA Semi PWRficient. Used by ethernet, function and security
@@ -40,6 +40,11 @@ enum { 
	PAS_DMA_COM_TXSTA = 0x104,	/* Transmit Status Register   */

	PAS_DMA_COM_RXCMD = 0x108,	/* Receive Command Register   */

	PAS_DMA_COM_RXSTA = 0x10c,	/* Receive Status Register    */

	PAS_DMA_COM_CFG   = 0x114,	/* Common config reg	      */

	PAS_DMA_TXF_SFLG0 = 0x140,	/* Set flags                  */

	PAS_DMA_TXF_SFLG1 = 0x144,	/* Set flags                  */

	PAS_DMA_TXF_CFLG0 = 0x148,	/* Set flags                  */

	PAS_DMA_TXF_CFLG1 = 0x14c,	/* Set flags                  */

};