| Message ID | 1371762407-24544-4-git-send-email-joelagnel@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 6/21/2013 2:36 AM, Joel A Fernandes wrote: > From: Matt Porter <mporter@ti.com> > > You should add a description apart from just documenting what you changed in this patch. Changes by Joel: > * Split EDMA xbar support out of original EDMA DT parsing patch > to keep it easier for review. > * Rewrite shift and offset calculation. > > Suggested-by: Sekhar Nori <nsekhar@ti.com> > Suggested by: Andy Shevchenko <andy.shevchenko@gmail.com> > Signed-off-by: Joel A Fernandes <joelagnel@ti.com> > > Reference: > [1] https://patchwork.kernel.org/patch/2226991/ > --- > arch/arm/common/edma.c | 62 +++++++++++++++++++++++++++++++++++- > include/linux/platform_data/edma.h | 1 + > 2 files changed, 62 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c > index 407e01e..a03d4f0 100644 > --- a/arch/arm/common/edma.c > +++ b/arch/arm/common/edma.c > @@ -568,7 +568,7 @@ static int prepare_unused_channel_list(struct device *dev, void *data) > (int)pdev->resource[i].start >= 0) { > ctlr = EDMA_CTLR(pdev->resource[i].start); > clear_bit(EDMA_CHAN_SLOT(pdev->resource[i].start), > - edma_cc[ctlr]->edma_unused); > + edma_cc[ctlr]->edma_unused); There are two problems with this hunk: 1) It does not belong to this patch. I said that earlier. 2) It actually introduces a new checkpatch issue. I dropped this hunk. > } > } > > @@ -1393,6 +1393,52 @@ static int edma_of_read_u32_to_s16_array(const struct device_node *np, > return 0; > } > > +static int edma_xbar_event_map(struct device *dev, > + struct device_node *node, > + struct edma_soc_info *pdata, int len) > +{ > + int ret = 0; No need to initialize ret here since you use it only after init. I fixed that. > + int i; > + struct resource res; > + void __iomem *xbar; > + const s16 (*xbar_chans)[2]; > + u32 shift, offset, mux; > + > + xbar_chans = devm_kzalloc(dev, > + len/sizeof(s16) + 2*sizeof(s16), > + GFP_KERNEL); > + if (!xbar_chans) > + return -ENOMEM; > + > + ret = of_address_to_resource(node, 1, &res); > + if (ret) > + return -EIO; > + > + xbar = devm_ioremap(dev, res.start, resource_size(&res)); > + if (!xbar) > + return -ENOMEM; > + > + ret = edma_of_read_u32_to_s16_array(node, > + "ti,edma-xbar-event-map", > + (s16 *)xbar_chans, > + len/sizeof(u32)); > + if (ret) > + return -EIO; > + > + for (i = 0; xbar_chans[i][0] != -1; i++) { > + shift = (xbar_chans[i][1] & 0x03) << 3; > + offset = xbar_chans[i][1] & 0xfffffffc; > + mux = readl(xbar + offset); > + mux &= ~(0xff << shift); > + mux |= xbar_chans[i][0] << shift; > + writel(mux, (xbar + offset)); > + } > + > + pdata->xbar_chans = xbar_chans; > + > + return 0; > +} > + > static int edma_of_parse_dt(struct device *dev, > struct device_node *node, > struct edma_soc_info *pdata) > @@ -1458,6 +1504,10 @@ static int edma_of_parse_dt(struct device *dev, > > pdata->default_queue = 0; > > + prop = of_find_property(node, "ti,edma-xbar-event-map", &sz); > + if (prop) > + ret = edma_xbar_event_map(dev, node, pdata, sz); > + > return ret; > } > > @@ -1476,6 +1526,7 @@ static int edma_probe(struct platform_device *pdev) > int status = -1; > const s16 (*rsv_chans)[2]; > const s16 (*rsv_slots)[2]; > + const s16 (*xbar_chans)[2]; > int irq[EDMA_MAX_CC] = {0, 0}; > int err_irq[EDMA_MAX_CC] = {0, 0}; > struct resource *r[EDMA_MAX_CC] = {NULL}; > @@ -1591,6 +1642,15 @@ static int edma_probe(struct platform_device *pdev) > } > } > > + /* Clear the xbar mapped channels in unused list */ > + xbar_chans = info[j]->xbar_chans; > + if (xbar_chans) { > + for (i = 0; xbar_chans[i][1] != -1; i++) { > + off = xbar_chans[i][1]; > + clear_bits(off, 1, > + edma_cc[j]->edma_unused); You ignored my request to fix the alignment issue here. I will send the updated patch separately. Thanks, Sekhar
diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c index 407e01e..a03d4f0 100644 --- a/arch/arm/common/edma.c +++ b/arch/arm/common/edma.c @@ -568,7 +568,7 @@ static int prepare_unused_channel_list(struct device *dev, void *data) (int)pdev->resource[i].start >= 0) { ctlr = EDMA_CTLR(pdev->resource[i].start); clear_bit(EDMA_CHAN_SLOT(pdev->resource[i].start), - edma_cc[ctlr]->edma_unused); + edma_cc[ctlr]->edma_unused); } } @@ -1393,6 +1393,52 @@ static int edma_of_read_u32_to_s16_array(const struct device_node *np, return 0; } +static int edma_xbar_event_map(struct device *dev, + struct device_node *node, + struct edma_soc_info *pdata, int len) +{ + int ret = 0; + int i; + struct resource res; + void __iomem *xbar; + const s16 (*xbar_chans)[2]; + u32 shift, offset, mux; + + xbar_chans = devm_kzalloc(dev, + len/sizeof(s16) + 2*sizeof(s16), + GFP_KERNEL); + if (!xbar_chans) + return -ENOMEM; + + ret = of_address_to_resource(node, 1, &res); + if (ret) + return -EIO; + + xbar = devm_ioremap(dev, res.start, resource_size(&res)); + if (!xbar) + return -ENOMEM; + + ret = edma_of_read_u32_to_s16_array(node, + "ti,edma-xbar-event-map", + (s16 *)xbar_chans, + len/sizeof(u32)); + if (ret) + return -EIO; + + for (i = 0; xbar_chans[i][0] != -1; i++) { + shift = (xbar_chans[i][1] & 0x03) << 3; + offset = xbar_chans[i][1] & 0xfffffffc; + mux = readl(xbar + offset); + mux &= ~(0xff << shift); + mux |= xbar_chans[i][0] << shift; + writel(mux, (xbar + offset)); + } + + pdata->xbar_chans = xbar_chans; + + return 0; +} + static int edma_of_parse_dt(struct device *dev, struct device_node *node, struct edma_soc_info *pdata) @@ -1458,6 +1504,10 @@ static int edma_of_parse_dt(struct device *dev, pdata->default_queue = 0; + prop = of_find_property(node, "ti,edma-xbar-event-map", &sz); + if (prop) + ret = edma_xbar_event_map(dev, node, pdata, sz); + return ret; } @@ -1476,6 +1526,7 @@ static int edma_probe(struct platform_device *pdev) int status = -1; const s16 (*rsv_chans)[2]; const s16 (*rsv_slots)[2]; + const s16 (*xbar_chans)[2]; int irq[EDMA_MAX_CC] = {0, 0}; int err_irq[EDMA_MAX_CC] = {0, 0}; struct resource *r[EDMA_MAX_CC] = {NULL}; @@ -1591,6 +1642,15 @@ static int edma_probe(struct platform_device *pdev) } } + /* Clear the xbar mapped channels in unused list */ + xbar_chans = info[j]->xbar_chans; + if (xbar_chans) { + for (i = 0; xbar_chans[i][1] != -1; i++) { + off = xbar_chans[i][1]; + clear_bits(off, 1, + edma_cc[j]->edma_unused); + } + } if (node) { irq[j] = irq_of_parse_and_map(node, 0); diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h index 317f2be..57300fd 100644 --- a/include/linux/platform_data/edma.h +++ b/include/linux/platform_data/edma.h @@ -177,6 +177,7 @@ struct edma_soc_info { s8 (*queue_tc_mapping)[2]; s8 (*queue_priority_mapping)[2]; + const s16 (*xbar_chans)[2]; }; #endif