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dma: gpi: Add support to assign static GPII for I2C Touch on Lahaina

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Add support to assign static GPII0 for I2C LA Touch usecase on Lahaina.

Change-Id: Ib0ea811626796825e280bf77f04ef68ab5f833a8
Signed-off-by: Vipin Deep Kaur <vkaur@codeaurora.org>
This commit is contained in:
Vipin Deep Kaur 2020-05-27 17:04:21 +05:30 • committed by Gerrit - the friendly Code Review server
commit d23787975b
2 changed files with 29 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

33
drivers/dma/qcom/gpi.c
View file

@ -441,6 +441,7 @@ struct gpi_dev {
void *ee_base; /*ee register base address*/
u32 max_gpii; /* maximum # of gpii instances available per gpi block */
u32 gpii_mask; /* gpii instances available for apps */
u32 static_gpii_mask; /* gpii instances assigned statically */
u32 ev_factor; /* ev ring length factor */
u32 smmu_cfg;
dma_addr_t iova_base;
@ -2777,14 +2778,17 @@ xfer_alloc_err:
return ret;
}
static int gpi_find_avail_gpii(struct gpi_dev *gpi_dev, u32 seid)
static int gpi_find_avail_gpii(struct gpi_dev *gpi_dev, u32 seid,
bool static_gpii)
{
int gpii;
struct gpii_chan *tx_chan, *rx_chan;
u32 gpii_mask =
static_gpii ? gpi_dev->static_gpii_mask : gpi_dev->gpii_mask;
/* check if same seid is already configured for another chid */
for (gpii = 0; gpii < gpi_dev->max_gpii; gpii++) {
if (!((1 << gpii) & gpi_dev->gpii_mask))
if (!((1 << gpii) & gpii_mask))
continue;
tx_chan = &gpi_dev->gpiis[gpii].gpii_chan[GPI_TX_CHAN];
@ -2798,7 +2802,7 @@ static int gpi_find_avail_gpii(struct gpi_dev *gpi_dev, u32 seid)
/* no channels configured with same seid, return next avail gpii */
for (gpii = 0; gpii < gpi_dev->max_gpii; gpii++) {
if (!((1 << gpii) & gpi_dev->gpii_mask))
if (!((1 << gpii) & gpii_mask))
continue;
tx_chan = &gpi_dev->gpiis[gpii].gpii_chan[GPI_TX_CHAN];
@ -2823,8 +2827,9 @@ static struct dma_chan *gpi_of_dma_xlate(struct of_phandle_args *args,
{
struct gpi_dev *gpi_dev = (struct gpi_dev *)of_dma->of_dma_data;
u32 seid, chid;
int gpii;
int gpii, val;
struct gpii_chan *gpii_chan;
bool static_gpii;
if (args->args_count < REQ_OF_DMA_ARGS) {
GPI_ERR(gpi_dev,
@ -2840,9 +2845,11 @@ static struct dma_chan *gpi_of_dma_xlate(struct of_phandle_args *args,
}
seid = args->args[1];
val = (args->args[4] & STATIC_GPII_BMSK) >> STATIC_GPII_SHFT;
static_gpii = (val == 1) ? true : false;
/* find next available gpii to use */
gpii = gpi_find_avail_gpii(gpi_dev, seid);
gpii = gpi_find_avail_gpii(gpi_dev, seid, static_gpii);
if (gpii < 0) {
GPI_ERR(gpi_dev, "no available gpii instances\n");
return NULL;
@ -2859,7 +2866,7 @@ static struct dma_chan *gpi_of_dma_xlate(struct of_phandle_args *args,
gpii_chan->seid = seid;
gpii_chan->protocol = args->args[2];
gpii_chan->req_tres = args->args[3];
gpii_chan->priority = args->args[4];
gpii_chan->priority = args->args[4] & GPI_EV_PRIORITY_BMSK;
GPI_LOG(gpi_dev,
"client req. gpii:%u chid:%u #_tre:%u priority:%u protocol:%u\n",
@ -2897,7 +2904,8 @@ static void gpi_setup_debug(struct gpi_dev *gpi_dev)
for (i = 0; i < gpi_dev->max_gpii; i++) {
struct gpii *gpii;
if (!((1 << i) & gpi_dev->gpii_mask))
if (!(((1 << i) & gpi_dev->gpii_mask) ||
((1 << i) & gpi_dev->static_gpii_mask)))
continue;
gpii = &gpi_dev->gpiis[i];
@ -2969,6 +2977,11 @@ static int gpi_probe(struct platform_device *pdev)
return ret;
}
ret = of_property_read_u32(gpi_dev->dev->of_node,
"qcom,static-gpii-mask", &gpi_dev->static_gpii_mask);
if (!ret)
GPI_LOG(gpi_dev, "static GPII usecase\n");
ret = of_property_read_u32(gpi_dev->dev->of_node,
"qcom,gpi-ee-offset", &gpi_ee_offset);
if (ret)
@ -3011,7 +3024,8 @@ static int gpi_probe(struct platform_device *pdev)
struct gpii *gpii = &gpi_dev->gpiis[i];
int chan;
if (!((1 << i) & gpi_dev->gpii_mask))
if (!(((1 << i) & gpi_dev->gpii_mask) ||
((1 << i) & gpi_dev->static_gpii_mask)))
continue;
/* set up ev cntxt register map */
@ -3139,7 +3153,8 @@ static int gpi_remove(struct platform_device *pdev)
struct gpii *gpii = &gpi_dev->gpiis[i];
int chan;
if (!((1 << i) & gpi_dev->gpii_mask))
if (!(((1 << i) & gpi_dev->gpii_mask) ||
((1 << i) & gpi_dev->static_gpii_mask)))
continue;
for (chan = 0; chan < MAX_CHANNELS_PER_GPII; chan++) {

5
include/linux/msm_gpi.h
View file

@ -179,6 +179,11 @@ enum msm_gpi_tre_type {
#define MSM_GPI_RING_PHYS_ADDR_UPPER(ptr) 0
#endif
/* Static GPII */
#define STATIC_GPII_BMSK (0x2)
#define STATIC_GPII_SHFT (0x1)
#define GPI_EV_PRIORITY_BMSK (0x1)
/* cmds to perform by using dmaengine_slave_config() */
enum msm_gpi_ctrl_cmd {
MSM_GPI_INIT,