diff options
| author | Daniel Mack <zonque@gmail.com> | 2013-10-22 12:14:03 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2013-11-12 14:28:24 +0530 |
| commit | f8964968ab841cb28b0999f346ee3c2491076257 (patch) | |
| tree | edff04bee3e19e06eb3e3a5bbdfb31a216fc4f4d /drivers | |
| parent | 262093791b936a5cc8ef2ede37454bc1ddcdb911 (diff) | |
| download | linux-next-f8964968ab841cb28b0999f346ee3c2491076257.tar.gz | |
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 <zonque@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/cppi41.c | 15 |
1 files changed, 15 insertions, 0 deletions
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; |