From dad1740133ffe49ae44044f97e4cbfcb42f037b1 Mon Sep 17 00:00:00 2001 From: Vijay Kumar Date: Mon, 21 Sep 2009 11:23:57 +0530 Subject: [PATCH] Staging: poch: Parameter to enable loopback Enable setting of loopback through module parameter. Signed-off-by: Vijay Kumar Signed-off-by: Greg Kroah-Hartman --- drivers/staging/poch/poch.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/staging/poch/poch.c b/drivers/staging/poch/poch.c index 1637c281ea3c..babd881809a9 100644 --- a/drivers/staging/poch/poch.c +++ b/drivers/staging/poch/poch.c @@ -252,6 +252,11 @@ module_param(synth_rx, bool, 0600); MODULE_PARM_DESC(synth_rx, "Synthesize received values using a counter. Default: No"); +static int loopback; +module_param(loopback, bool, 0600); +MODULE_PARM_DESC(loopback, + "Enable hardware loopback of trasnmitted data. Default: No"); + static dev_t poch_first_dev; static struct class *poch_cls; static DEFINE_IDR(poch_ids); @@ -830,9 +835,14 @@ static int poch_open(struct inode *inode, struct file *filp) if (channel->dir == CHANNEL_DIR_TX) { /* Flush TX FIFO and output data from cardbus. */ - iowrite32(FPGA_TX_CTL_FIFO_FLUSH - | FPGA_TX_CTL_OUTPUT_CARDBUS, - fpga + FPGA_TX_CTL_REG); + u32 ctl_val = 0; + + ctl_val |= FPGA_TX_CTL_FIFO_FLUSH; + ctl_val |= FPGA_TX_CTL_OUTPUT_CARDBUS; + if (loopback) + ctl_val |= FPGA_TX_CTL_LOOPBACK; + + iowrite32(ctl_val, fpga + FPGA_TX_CTL_REG); } else { /* Flush RX FIFO and output data to cardbus. */ u32 ctl_val = FPGA_RX_CTL_CONT_CAP | FPGA_RX_CTL_FIFO_FLUSH; -- 2.30.2