From f8964968ab841cb28b0999f346ee3c2491076257 Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Tue, 22 Oct 2013 12:14:03 +0200 Subject: dma: cppi41: restore more registers With active users over suspend/resume cycles, it turns out that more registers, in particular DMA_TDFDQ and RXHPCRA0, have to be restored on resume. Signed-off-by: Daniel Mack Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Vinod Koul --- drivers/dma/cppi41.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/dma/cppi41.c') diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c index 278b3058919a..7a90317d2e7d 100644 --- a/drivers/dma/cppi41.c +++ b/drivers/dma/cppi41.c @@ -141,6 +141,9 @@ struct cppi41_dd { const struct chan_queues *queues_rx; const struct chan_queues *queues_tx; struct chan_queues td_queue; + + /* context for suspend/resume */ + unsigned int dma_tdfdq; }; #define FIST_COMPLETION_QUEUE 93 @@ -1050,6 +1053,7 @@ static int cppi41_suspend(struct device *dev) { struct cppi41_dd *cdd = dev_get_drvdata(dev); + cdd->dma_tdfdq = cppi_readl(cdd->ctrl_mem + DMA_TDFDQ); cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR); disable_sched(cdd); @@ -1059,12 +1063,23 @@ static int cppi41_suspend(struct device *dev) static int cppi41_resume(struct device *dev) { struct cppi41_dd *cdd = dev_get_drvdata(dev); + struct cppi41_channel *c; int i; for (i = 0; i < DESCS_AREAS; i++) cppi_writel(cdd->descs_phys, cdd->qmgr_mem + QMGR_MEMBASE(i)); + list_for_each_entry(c, &cdd->ddev.channels, chan.device_node) + if (!c->is_tx) + cppi_writel(c->q_num, c->gcr_reg + RXHPCRA0); + init_sched(cdd); + + cppi_writel(cdd->dma_tdfdq, cdd->ctrl_mem + DMA_TDFDQ); + cppi_writel(cdd->scratch_phys, cdd->qmgr_mem + QMGR_LRAM0_BASE); + cppi_writel(QMGR_SCRATCH_SIZE, cdd->qmgr_mem + QMGR_LRAM_SIZE); + cppi_writel(0, cdd->qmgr_mem + QMGR_LRAM1_BASE); + cppi_writel(USBSS_IRQ_PD_COMP, cdd->usbss_mem + USBSS_IRQ_ENABLER); return 0; -- cgit v1.2.3