From: Angelo Dureghello <angelo@sysam.it>
To: vinod.koul@linaro.org
Cc: dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-m68k@vger.kernel.org, stefan@agner.ch, krzk@kernel.org,
Angelo Dureghello <angelo@sysam.it>
Subject: [v8,2/3] dmaengine: fsl-edma: add edma version and configurable registers
Date: Fri, 3 Aug 2018 21:32:43 +0200 [thread overview]
Message-ID: <20180803193244.12084-2-angelo@sysam.it> (raw)
This patch adds configurable registers (using __iomem addresses)
to allow the use of fsl-edma-common code with slightly different
edma module versions, as Vybrid (v1) and ColdFire (v2) are.
Removal of old membase-referenced registers, amd some fixes on
macroes are included.
Signed-off-by: Angelo Dureghello <angelo@sysam.it>
---
Changes from v7:
- patch rewritten from scratch, this patch (2/3) has just been added.
---
drivers/dma/fsl-edma-common.c | 138 ++++++++++++++++++++++++++--------
drivers/dma/fsl-edma-common.h | 115 ++++++++++++++--------------
drivers/dma/fsl-edma.c | 32 ++++----
3 files changed, 182 insertions(+), 103 deletions(-)
diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index 0ae7094f477a..948a3ee51bbb 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -9,6 +9,38 @@
#include "fsl-edma-common.h"
+#define EDMA_CR 0x00
+#define EDMA_ES 0x04
+#define EDMA_ERQ 0x0C
+#define EDMA_EEI 0x14
+#define EDMA_SERQ 0x1B
+#define EDMA_CERQ 0x1A
+#define EDMA_SEEI 0x19
+#define EDMA_CEEI 0x18
+#define EDMA_CINT 0x1F
+#define EDMA_CERR 0x1E
+#define EDMA_SSRT 0x1D
+#define EDMA_CDNE 0x1C
+#define EDMA_INTR 0x24
+#define EDMA_ERR 0x2C
+
+#define EDMA64_ERQH 0x08
+#define EDMA64_EEIH 0x10
+#define EDMA64_SERQ 0x18
+#define EDMA64_CERQ 0x19
+#define EDMA64_SEEI 0x1a
+#define EDMA64_CEEI 0x1b
+#define EDMA64_CINT 0x1c
+#define EDMA64_CERR 0x1d
+#define EDMA64_SSRT 0x1e
+#define EDMA64_CDNE 0x1f
+#define EDMA64_INTH 0x20
+#define EDMA64_INTL 0x24
+#define EDMA64_ERRH 0x28
+#define EDMA64_ERRL 0x2c
+
+#define EDMA_TCD 0x1000
+
/*
* R/W functions for big- or little-endian registers:
* The eDMA controller's endian is independent of the CPU core's endian.
@@ -67,20 +99,20 @@ EXPORT_SYMBOL_GPL(to_fsl_edma_desc);
static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan)
{
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
- edma_writeb(fsl_chan->edma, EDMA_SEEI_SEEI(ch), addr + EDMA_SEEI);
- edma_writeb(fsl_chan->edma, ch, addr + EDMA_SERQ);
+ edma_writeb(fsl_chan->edma, EDMA_SEEI_SEEI(ch), regs->seei);
+ edma_writeb(fsl_chan->edma, ch, regs->serq);
}
void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan)
{
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
- edma_writeb(fsl_chan->edma, ch, addr + EDMA_CERQ);
- edma_writeb(fsl_chan->edma, EDMA_CEEI_CEEI(ch), addr + EDMA_CEEI);
+ edma_writeb(fsl_chan->edma, ch, regs->cerq);
+ edma_writeb(fsl_chan->edma, EDMA_CEEI_CEEI(ch), regs->ceei);
}
EXPORT_SYMBOL_GPL(fsl_edma_disable_request);
@@ -208,7 +240,7 @@ static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan,
struct virt_dma_desc *vdesc, bool in_progress)
{
struct fsl_edma_desc *edesc = fsl_chan->edesc;
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
enum dma_transfer_direction dir = fsl_chan->fsc.dir;
dma_addr_t cur_addr, dma_addr;
@@ -224,11 +256,9 @@ static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan,
return len;
if (dir == DMA_MEM_TO_DEV)
- cur_addr = edma_readl(
- fsl_chan->edma, addr + EDMA_TCD_SADDR(ch));
+ cur_addr = edma_readl(fsl_chan->edma, ®s->tcd[ch].saddr);
else
- cur_addr = edma_readl(
- fsl_chan->edma, addr + EDMA_TCD_DADDR(ch));
+ cur_addr = edma_readl(fsl_chan->edma, ®s->tcd[ch].daddr);
/* figure out the finished and calculate the residue */
for (i = 0; i < fsl_chan->edesc->n_tcds; i++) {
@@ -285,7 +315,7 @@ static void fsl_edma_set_tcd_regs(struct fsl_edma_chan *fsl_chan,
struct fsl_edma_hw_tcd *tcd)
{
struct fsl_edma_engine *edma = fsl_chan->edma;
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
/*
@@ -293,24 +323,24 @@ static void fsl_edma_set_tcd_regs(struct fsl_edma_chan *fsl_chan,
* endian format. However, we need to load the TCD registers in
* big- or little-endian obeying the eDMA engine model endian.
*/
- edma_writew(edma, 0, addr + EDMA_TCD_CSR(ch));
- edma_writel(edma, le32_to_cpu(tcd->saddr), addr + EDMA_TCD_SADDR(ch));
- edma_writel(edma, le32_to_cpu(tcd->daddr), addr + EDMA_TCD_DADDR(ch));
+ edma_writew(edma, 0, ®s->tcd[ch].csr);
+ edma_writel(edma, le32_to_cpu(tcd->saddr), ®s->tcd[ch].saddr);
+ edma_writel(edma, le32_to_cpu(tcd->daddr), ®s->tcd[ch].daddr);
- edma_writew(edma, le16_to_cpu(tcd->attr), addr + EDMA_TCD_ATTR(ch));
- edma_writew(edma, le16_to_cpu(tcd->soff), addr + EDMA_TCD_SOFF(ch));
+ edma_writew(edma, le16_to_cpu(tcd->attr), ®s->tcd[ch].attr);
+ edma_writew(edma, le16_to_cpu(tcd->soff), ®s->tcd[ch].soff);
- edma_writel(edma, le32_to_cpu(tcd->nbytes), addr + EDMA_TCD_NBYTES(ch));
- edma_writel(edma, le32_to_cpu(tcd->slast), addr + EDMA_TCD_SLAST(ch));
+ edma_writel(edma, le32_to_cpu(tcd->nbytes), ®s->tcd[ch].nbytes);
+ edma_writel(edma, le32_to_cpu(tcd->slast), ®s->tcd[ch].slast);
- edma_writew(edma, le16_to_cpu(tcd->citer), addr + EDMA_TCD_CITER(ch));
- edma_writew(edma, le16_to_cpu(tcd->biter), addr + EDMA_TCD_BITER(ch));
- edma_writew(edma, le16_to_cpu(tcd->doff), addr + EDMA_TCD_DOFF(ch));
+ edma_writew(edma, le16_to_cpu(tcd->citer), ®s->tcd[ch].citer);
+ edma_writew(edma, le16_to_cpu(tcd->biter), ®s->tcd[ch].biter);
+ edma_writew(edma, le16_to_cpu(tcd->doff), ®s->tcd[ch].doff);
- edma_writel(edma,
- le32_to_cpu(tcd->dlast_sga), addr + EDMA_TCD_DLAST_SGA(ch));
+ edma_writel(edma, le32_to_cpu(tcd->dlast_sga),
+ ®s->tcd[ch].dlast_sga);
- edma_writew(edma, le16_to_cpu(tcd->csr), addr + EDMA_TCD_CSR(ch));
+ edma_writew(edma, le16_to_cpu(tcd->csr), ®s->tcd[ch].csr);
}
static inline
@@ -332,15 +362,15 @@ void fsl_edma_fill_tcd(struct fsl_edma_hw_tcd *tcd, u32 src, u32 dst,
tcd->attr = cpu_to_le16(attr);
- tcd->soff = cpu_to_le16(EDMA_TCD_SOFF_SOFF(soff));
+ tcd->soff = cpu_to_le16(soff);
- tcd->nbytes = cpu_to_le32(EDMA_TCD_NBYTES_NBYTES(nbytes));
- tcd->slast = cpu_to_le32(EDMA_TCD_SLAST_SLAST(slast));
+ tcd->nbytes = cpu_to_le32(nbytes);
+ tcd->slast = cpu_to_le32(slast);
tcd->citer = cpu_to_le16(EDMA_TCD_CITER_CITER(citer));
- tcd->doff = cpu_to_le16(EDMA_TCD_DOFF_DOFF(doff));
+ tcd->doff = cpu_to_le16(doff);
- tcd->dlast_sga = cpu_to_le32(EDMA_TCD_DLAST_SGA_DLAST_SGA(dlast_sga));
+ tcd->dlast_sga = cpu_to_le32(dlast_sga);
tcd->biter = cpu_to_le16(EDMA_TCD_BITER_BITER(biter));
if (major_int)
@@ -573,4 +603,52 @@ void fsl_edma_cleanup_vchan(struct dma_device *dmadev)
}
EXPORT_SYMBOL_GPL(fsl_edma_cleanup_vchan);
+/*
+ * On the 32 channels Vybrid/mpc577x edma version (here called "v1"),
+ * register offsets are different compared to ColdFire mcf5441x 64 channels
+ * edma (here called "v2").
+ *
+ * This function sets up register offsets as per proper declared version
+ * so must be called in xxx_edma_probe() just after setting the
+ * edma "version" and "membase" appropriately.
+ */
+void fsl_edma_setup_regs(struct fsl_edma_engine *edma)
+{
+ edma->regs.cr = edma->membase + EDMA_CR;
+ edma->regs.es = edma->membase + EDMA_ES;
+ edma->regs.erql = edma->membase + EDMA_ERQ;
+ edma->regs.eeil = edma->membase + EDMA_EEI;
+
+ edma->regs.serq = edma->membase + ((edma->version == v1) ?
+ EDMA_SERQ : EDMA64_SERQ);
+ edma->regs.cerq = edma->membase + ((edma->version == v1) ?
+ EDMA_CERQ : EDMA64_CERQ);
+ edma->regs.seei = edma->membase + ((edma->version == v1) ?
+ EDMA_SEEI : EDMA64_SEEI);
+ edma->regs.ceei = edma->membase + ((edma->version == v1) ?
+ EDMA_CEEI : EDMA64_CEEI);
+ edma->regs.cint = edma->membase + ((edma->version == v1) ?
+ EDMA_CINT : EDMA64_CINT);
+ edma->regs.cerr = edma->membase + ((edma->version == v1) ?
+ EDMA_CERR : EDMA64_CERR);
+ edma->regs.ssrt = edma->membase + ((edma->version == v1) ?
+ EDMA_SSRT : EDMA64_SSRT);
+ edma->regs.cdne = edma->membase + ((edma->version == v1) ?
+ EDMA_CDNE : EDMA64_CDNE);
+ edma->regs.intl = edma->membase + ((edma->version == v1) ?
+ EDMA_INTR : EDMA64_INTL);
+ edma->regs.errl = edma->membase + ((edma->version == v1) ?
+ EDMA_ERR : EDMA64_ERRL);
+
+ if (edma->version == v2) {
+ edma->regs.erqh = edma->membase + EDMA64_ERQH;
+ edma->regs.eeih = edma->membase + EDMA64_EEIH;
+ edma->regs.errh = edma->membase + EDMA64_ERRH;
+ edma->regs.inth = edma->membase + EDMA64_INTH;
+ }
+
+ edma->regs.tcd = edma->membase + EDMA_TCD;
+}
+EXPORT_SYMBOL_GPL(fsl_edma_setup_regs);
+
MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h
index f3ea68e15b23..7a9231e7639f 100644
--- a/drivers/dma/fsl-edma-common.h
+++ b/drivers/dma/fsl-edma-common.h
@@ -8,35 +8,6 @@
#include "virt-dma.h"
-#define EDMA_CR 0x00
-#define EDMA_ES 0x04
-#define EDMA_ERQ 0x0C
-#define EDMA_EEI 0x14
-#define EDMA_SERQ 0x1B
-#define EDMA_CERQ 0x1A
-#define EDMA_SEEI 0x19
-#define EDMA_CEEI 0x18
-#define EDMA_CINT 0x1F
-#define EDMA_CERR 0x1E
-#define EDMA_SSRT 0x1D
-#define EDMA_CDNE 0x1C
-#define EDMA_INTR 0x24
-#define EDMA_ERR 0x2C
-
-#define EDMA_TCD_SADDR(x) (0x1000 + 32 * (x))
-#define EDMA_TCD_SOFF(x) (0x1004 + 32 * (x))
-#define EDMA_TCD_ATTR(x) (0x1006 + 32 * (x))
-#define EDMA_TCD_NBYTES(x) (0x1008 + 32 * (x))
-#define EDMA_TCD_SLAST(x) (0x100C + 32 * (x))
-#define EDMA_TCD_DADDR(x) (0x1010 + 32 * (x))
-#define EDMA_TCD_DOFF(x) (0x1014 + 32 * (x))
-#define EDMA_TCD_CITER_ELINK(x) (0x1016 + 32 * (x))
-#define EDMA_TCD_CITER(x) (0x1016 + 32 * (x))
-#define EDMA_TCD_DLAST_SGA(x) (0x1018 + 32 * (x))
-#define EDMA_TCD_CSR(x) (0x101C + 32 * (x))
-#define EDMA_TCD_BITER_ELINK(x) (0x101E + 32 * (x))
-#define EDMA_TCD_BITER(x) (0x101E + 32 * (x))
-
#define EDMA_CR_EDBG BIT(1)
#define EDMA_CR_ERCA BIT(2)
#define EDMA_CR_ERGA BIT(3)
@@ -47,34 +18,29 @@
#define EDMA_CR_ECX BIT(16)
#define EDMA_CR_CX BIT(17)
-#define EDMA_SEEI_SEEI(x) ((x) & 0x1F)
-#define EDMA_CEEI_CEEI(x) ((x) & 0x1F)
-#define EDMA_CINT_CINT(x) ((x) & 0x1F)
-#define EDMA_CERR_CERR(x) ((x) & 0x1F)
-
-#define EDMA_TCD_ATTR_DSIZE(x) (((x) & 0x0007))
-#define EDMA_TCD_ATTR_DMOD(x) (((x) & 0x001F) << 3)
-#define EDMA_TCD_ATTR_SSIZE(x) (((x) & 0x0007) << 8)
-#define EDMA_TCD_ATTR_SMOD(x) (((x) & 0x001F) << 11)
-#define EDMA_TCD_ATTR_SSIZE_8BIT (0x0000)
-#define EDMA_TCD_ATTR_SSIZE_16BIT (0x0100)
-#define EDMA_TCD_ATTR_SSIZE_32BIT (0x0200)
-#define EDMA_TCD_ATTR_SSIZE_64BIT (0x0300)
-#define EDMA_TCD_ATTR_SSIZE_32BYTE (0x0500)
-#define EDMA_TCD_ATTR_DSIZE_8BIT (0x0000)
-#define EDMA_TCD_ATTR_DSIZE_16BIT (0x0001)
-#define EDMA_TCD_ATTR_DSIZE_32BIT (0x0002)
-#define EDMA_TCD_ATTR_DSIZE_64BIT (0x0003)
-#define EDMA_TCD_ATTR_DSIZE_32BYTE (0x0005)
-
-#define EDMA_TCD_SOFF_SOFF(x) (x)
-#define EDMA_TCD_NBYTES_NBYTES(x) (x)
-#define EDMA_TCD_SLAST_SLAST(x) (x)
-#define EDMA_TCD_DADDR_DADDR(x) (x)
-#define EDMA_TCD_CITER_CITER(x) ((x) & 0x7FFF)
-#define EDMA_TCD_DOFF_DOFF(x) (x)
-#define EDMA_TCD_DLAST_SGA_DLAST_SGA(x) (x)
-#define EDMA_TCD_BITER_BITER(x) ((x) & 0x7FFF)
+#define EDMA_SEEI_SEEI(x) ((x) & GENMASK(4, 0))
+#define EDMA_CEEI_CEEI(x) ((x) & GENMASK(4, 0))
+#define EDMA_CINT_CINT(x) ((x) & GENMASK(4, 0))
+#define EDMA_CERR_CERR(x) ((x) & GENMASK(4, 0))
+
+#define EDMA_TCD_ATTR_DSIZE(x) (((x) & GENMASK(2, 0)))
+#define EDMA_TCD_ATTR_DMOD(x) (((x) & GENMASK(4, 0)) << 3)
+#define EDMA_TCD_ATTR_SSIZE(x) (((x) & GENMASK(2, 0)) << 8)
+#define EDMA_TCD_ATTR_SMOD(x) (((x) & GENMASK(4, 0)) << 11)
+
+#define EDMA_TCD_ATTR_DSIZE_8BIT 0
+#define EDMA_TCD_ATTR_DSIZE_16BIT BIT(0)
+#define EDMA_TCD_ATTR_DSIZE_32BIT BIT(1)
+#define EDMA_TCD_ATTR_DSIZE_64BIT (BIT(0) | BIT(1))
+#define EDMA_TCD_ATTR_DSIZE_32BYTE (BIT(3) | BIT(0))
+#define EDMA_TCD_ATTR_SSIZE_8BIT 0
+#define EDMA_TCD_ATTR_SSIZE_16BIT (EDMA_TCD_ATTR_DSIZE_16BIT << 8)
+#define EDMA_TCD_ATTR_SSIZE_32BIT (EDMA_TCD_ATTR_DSIZE_32BIT << 8)
+#define EDMA_TCD_ATTR_SSIZE_64BIT (EDMA_TCD_ATTR_DSIZE_64BIT << 8)
+#define EDMA_TCD_ATTR_SSIZE_32BYTE (EDMA_TCD_ATTR_DSIZE_32BYTE << 8)
+
+#define EDMA_TCD_CITER_CITER(x) ((x) & GENMASK(14, 0))
+#define EDMA_TCD_BITER_BITER(x) ((x) & GENMASK(14, 0))
#define EDMA_TCD_CSR_START BIT(0)
#define EDMA_TCD_CSR_INT_MAJOR BIT(1)
@@ -87,7 +53,7 @@
#define EDMAMUX_CHCFG_DIS 0x0
#define EDMAMUX_CHCFG_ENBL 0x80
-#define EDMAMUX_CHCFG_SOURCE(n) ((n) & 0x3F)
+#define EDMAMUX_CHCFG_SOURCE(n) ((n) & GENMASK(6, 0))
#define DMAMUX_NR 2
@@ -114,6 +80,31 @@ struct fsl_edma_hw_tcd {
__le16 biter;
};
+/*
+ * This are iomem pointers, for both v32 and v64.
+ */
+struct edma_regs {
+ void __iomem *cr;
+ void __iomem *es;
+ void __iomem *erqh;
+ void __iomem *erql; /* aka erq on v32 */
+ void __iomem *eeih;
+ void __iomem *eeil; /* aka eei on v32 */
+ void __iomem *seei;
+ void __iomem *ceei;
+ void __iomem *serq;
+ void __iomem *cerq;
+ void __iomem *cint;
+ void __iomem *cerr;
+ void __iomem *ssrt;
+ void __iomem *cdne;
+ void __iomem *inth;
+ void __iomem *intl;
+ void __iomem *errh;
+ void __iomem *errl;
+ struct fsl_edma_hw_tcd __iomem *tcd;
+};
+
struct fsl_edma_sw_tcd {
dma_addr_t ptcd;
struct fsl_edma_hw_tcd *vtcd;
@@ -147,6 +138,11 @@ struct fsl_edma_desc {
struct fsl_edma_sw_tcd tcd[];
};
+enum edma_version {
+ v1, /* 32ch, Vybdir, mpc57x, etc */
+ v2, /* 64ch Coldfire */
+};
+
struct fsl_edma_engine {
struct dma_device dma_dev;
void __iomem *membase;
@@ -157,6 +153,8 @@ struct fsl_edma_engine {
int txirq;
int errirq;
bool big_endian;
+ enum edma_version version;
+ struct edma_regs regs;
struct fsl_edma_chan chans[];
};
@@ -192,5 +190,6 @@ void fsl_edma_issue_pending(struct dma_chan *chan);
int fsl_edma_alloc_chan_resources(struct dma_chan *chan);
void fsl_edma_free_chan_resources(struct dma_chan *chan);
void fsl_edma_cleanup_vchan(struct dma_device *dmadev);
+void fsl_edma_setup_regs(struct fsl_edma_engine *edma);
#endif /* _FSL_EDMA_COMMON_H_ */
diff --git a/drivers/dma/fsl-edma.c b/drivers/dma/fsl-edma.c
index 337ad0c0ea78..34d70112fcc9 100644
--- a/drivers/dma/fsl-edma.c
+++ b/drivers/dma/fsl-edma.c
@@ -28,19 +28,16 @@ static irqreturn_t fsl_edma_tx_handler(int irq, void *dev_id)
{
struct fsl_edma_engine *fsl_edma = dev_id;
unsigned int intr, ch;
- void __iomem *base_addr;
+ struct edma_regs *regs = &fsl_edma->regs;
struct fsl_edma_chan *fsl_chan;
- base_addr = fsl_edma->membase;
-
- intr = edma_readl(fsl_edma, base_addr + EDMA_INTR);
+ intr = edma_readl(fsl_edma, regs->intl);
if (!intr)
return IRQ_NONE;
for (ch = 0; ch < fsl_edma->n_chans; ch++) {
if (intr & (0x1 << ch)) {
- edma_writeb(fsl_edma, EDMA_CINT_CINT(ch),
- base_addr + EDMA_CINT);
+ edma_writeb(fsl_edma, EDMA_CINT_CINT(ch), regs->cint);
fsl_chan = &fsl_edma->chans[ch];
@@ -68,16 +65,16 @@ static irqreturn_t fsl_edma_err_handler(int irq, void *dev_id)
{
struct fsl_edma_engine *fsl_edma = dev_id;
unsigned int err, ch;
+ struct edma_regs *regs = &fsl_edma->regs;
- err = edma_readl(fsl_edma, fsl_edma->membase + EDMA_ERR);
+ err = edma_readl(fsl_edma, regs->errl);
if (!err)
return IRQ_NONE;
for (ch = 0; ch < fsl_edma->n_chans; ch++) {
if (err & (0x1 << ch)) {
fsl_edma_disable_request(&fsl_edma->chans[ch]);
- edma_writeb(fsl_edma, EDMA_CERR_CERR(ch),
- fsl_edma->membase + EDMA_CERR);
+ edma_writeb(fsl_edma, EDMA_CERR_CERR(ch), regs->cerr);
fsl_edma->chans[ch].status = DMA_ERROR;
fsl_edma->chans[ch].idle = true;
}
@@ -192,6 +189,7 @@ static int fsl_edma_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct fsl_edma_engine *fsl_edma;
struct fsl_edma_chan *fsl_chan;
+ struct edma_regs *regs;
struct resource *res;
int len, chans;
int ret, i;
@@ -207,6 +205,7 @@ static int fsl_edma_probe(struct platform_device *pdev)
if (!fsl_edma)
return -ENOMEM;
+ fsl_edma->version = v1;
fsl_edma->n_chans = chans;
mutex_init(&fsl_edma->fsl_edma_mutex);
@@ -215,6 +214,9 @@ static int fsl_edma_probe(struct platform_device *pdev)
if (IS_ERR(fsl_edma->membase))
return PTR_ERR(fsl_edma->membase);
+ fsl_edma_setup_regs(fsl_edma);
+ regs = &fsl_edma->regs;
+
for (i = 0; i < DMAMUX_NR; i++) {
char clkname[32];
@@ -255,11 +257,11 @@ static int fsl_edma_probe(struct platform_device *pdev)
fsl_chan->vchan.desc_free = fsl_edma_free_desc;
vchan_init(&fsl_chan->vchan, &fsl_edma->dma_dev);
- edma_writew(fsl_edma, 0x0, fsl_edma->membase + EDMA_TCD_CSR(i));
+ edma_writew(fsl_edma, 0x0, ®s->tcd[i].csr);
fsl_edma_chan_mux(fsl_chan, 0, false);
}
- edma_writel(fsl_edma, ~0, fsl_edma->membase + EDMA_INTR);
+ edma_writel(fsl_edma, ~0, regs->intl);
ret = fsl_edma_irq_init(pdev, fsl_edma);
if (ret)
return ret;
@@ -306,7 +308,7 @@ static int fsl_edma_probe(struct platform_device *pdev)
}
/* enable round robin arbitration */
- edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, fsl_edma->membase + EDMA_CR);
+ edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);
return 0;
}
@@ -353,18 +355,18 @@ static int fsl_edma_resume_early(struct device *dev)
{
struct fsl_edma_engine *fsl_edma = dev_get_drvdata(dev);
struct fsl_edma_chan *fsl_chan;
+ struct edma_regs *regs = &fsl_edma->regs;
int i;
for (i = 0; i < fsl_edma->n_chans; i++) {
fsl_chan = &fsl_edma->chans[i];
fsl_chan->pm_state = RUNNING;
- edma_writew(fsl_edma, 0x0, fsl_edma->membase + EDMA_TCD_CSR(i));
+ edma_writew(fsl_edma, 0x0, ®s->tcd[i].csr);
if (fsl_chan->slave_id != 0)
fsl_edma_chan_mux(fsl_chan, fsl_chan->slave_id, true);
}
- edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA,
- fsl_edma->membase + EDMA_CR);
+ edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);
return 0;
}
WARNING: multiple messages have this Message-ID (diff)
From: Angelo Dureghello <angelo@sysam.it>
To: vinod.koul@linaro.org
Cc: linux-m68k@vger.kernel.org, Angelo Dureghello <angelo@sysam.it>,
krzk@kernel.org, stefan@agner.ch, dmaengine@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 2/3] dmaengine: fsl-edma: add edma version and configurable registers
Date: Fri, 3 Aug 2018 21:32:43 +0200 [thread overview]
Message-ID: <20180803193244.12084-2-angelo@sysam.it> (raw)
In-Reply-To: <20180803193244.12084-1-angelo@sysam.it>
This patch adds configurable registers (using __iomem addresses)
to allow the use of fsl-edma-common code with slightly different
edma module versions, as Vybrid (v1) and ColdFire (v2) are.
Removal of old membase-referenced registers, amd some fixes on
macroes are included.
Signed-off-by: Angelo Dureghello <angelo@sysam.it>
---
Changes from v7:
- patch rewritten from scratch, this patch (2/3) has just been added.
---
drivers/dma/fsl-edma-common.c | 138 ++++++++++++++++++++++++++--------
drivers/dma/fsl-edma-common.h | 115 ++++++++++++++--------------
drivers/dma/fsl-edma.c | 32 ++++----
3 files changed, 182 insertions(+), 103 deletions(-)
diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index 0ae7094f477a..948a3ee51bbb 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -9,6 +9,38 @@
#include "fsl-edma-common.h"
+#define EDMA_CR 0x00
+#define EDMA_ES 0x04
+#define EDMA_ERQ 0x0C
+#define EDMA_EEI 0x14
+#define EDMA_SERQ 0x1B
+#define EDMA_CERQ 0x1A
+#define EDMA_SEEI 0x19
+#define EDMA_CEEI 0x18
+#define EDMA_CINT 0x1F
+#define EDMA_CERR 0x1E
+#define EDMA_SSRT 0x1D
+#define EDMA_CDNE 0x1C
+#define EDMA_INTR 0x24
+#define EDMA_ERR 0x2C
+
+#define EDMA64_ERQH 0x08
+#define EDMA64_EEIH 0x10
+#define EDMA64_SERQ 0x18
+#define EDMA64_CERQ 0x19
+#define EDMA64_SEEI 0x1a
+#define EDMA64_CEEI 0x1b
+#define EDMA64_CINT 0x1c
+#define EDMA64_CERR 0x1d
+#define EDMA64_SSRT 0x1e
+#define EDMA64_CDNE 0x1f
+#define EDMA64_INTH 0x20
+#define EDMA64_INTL 0x24
+#define EDMA64_ERRH 0x28
+#define EDMA64_ERRL 0x2c
+
+#define EDMA_TCD 0x1000
+
/*
* R/W functions for big- or little-endian registers:
* The eDMA controller's endian is independent of the CPU core's endian.
@@ -67,20 +99,20 @@ EXPORT_SYMBOL_GPL(to_fsl_edma_desc);
static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan)
{
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
- edma_writeb(fsl_chan->edma, EDMA_SEEI_SEEI(ch), addr + EDMA_SEEI);
- edma_writeb(fsl_chan->edma, ch, addr + EDMA_SERQ);
+ edma_writeb(fsl_chan->edma, EDMA_SEEI_SEEI(ch), regs->seei);
+ edma_writeb(fsl_chan->edma, ch, regs->serq);
}
void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan)
{
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
- edma_writeb(fsl_chan->edma, ch, addr + EDMA_CERQ);
- edma_writeb(fsl_chan->edma, EDMA_CEEI_CEEI(ch), addr + EDMA_CEEI);
+ edma_writeb(fsl_chan->edma, ch, regs->cerq);
+ edma_writeb(fsl_chan->edma, EDMA_CEEI_CEEI(ch), regs->ceei);
}
EXPORT_SYMBOL_GPL(fsl_edma_disable_request);
@@ -208,7 +240,7 @@ static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan,
struct virt_dma_desc *vdesc, bool in_progress)
{
struct fsl_edma_desc *edesc = fsl_chan->edesc;
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
enum dma_transfer_direction dir = fsl_chan->fsc.dir;
dma_addr_t cur_addr, dma_addr;
@@ -224,11 +256,9 @@ static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan,
return len;
if (dir == DMA_MEM_TO_DEV)
- cur_addr = edma_readl(
- fsl_chan->edma, addr + EDMA_TCD_SADDR(ch));
+ cur_addr = edma_readl(fsl_chan->edma, ®s->tcd[ch].saddr);
else
- cur_addr = edma_readl(
- fsl_chan->edma, addr + EDMA_TCD_DADDR(ch));
+ cur_addr = edma_readl(fsl_chan->edma, ®s->tcd[ch].daddr);
/* figure out the finished and calculate the residue */
for (i = 0; i < fsl_chan->edesc->n_tcds; i++) {
@@ -285,7 +315,7 @@ static void fsl_edma_set_tcd_regs(struct fsl_edma_chan *fsl_chan,
struct fsl_edma_hw_tcd *tcd)
{
struct fsl_edma_engine *edma = fsl_chan->edma;
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
/*
@@ -293,24 +323,24 @@ static void fsl_edma_set_tcd_regs(struct fsl_edma_chan *fsl_chan,
* endian format. However, we need to load the TCD registers in
* big- or little-endian obeying the eDMA engine model endian.
*/
- edma_writew(edma, 0, addr + EDMA_TCD_CSR(ch));
- edma_writel(edma, le32_to_cpu(tcd->saddr), addr + EDMA_TCD_SADDR(ch));
- edma_writel(edma, le32_to_cpu(tcd->daddr), addr + EDMA_TCD_DADDR(ch));
+ edma_writew(edma, 0, ®s->tcd[ch].csr);
+ edma_writel(edma, le32_to_cpu(tcd->saddr), ®s->tcd[ch].saddr);
+ edma_writel(edma, le32_to_cpu(tcd->daddr), ®s->tcd[ch].daddr);
- edma_writew(edma, le16_to_cpu(tcd->attr), addr + EDMA_TCD_ATTR(ch));
- edma_writew(edma, le16_to_cpu(tcd->soff), addr + EDMA_TCD_SOFF(ch));
+ edma_writew(edma, le16_to_cpu(tcd->attr), ®s->tcd[ch].attr);
+ edma_writew(edma, le16_to_cpu(tcd->soff), ®s->tcd[ch].soff);
- edma_writel(edma, le32_to_cpu(tcd->nbytes), addr + EDMA_TCD_NBYTES(ch));
- edma_writel(edma, le32_to_cpu(tcd->slast), addr + EDMA_TCD_SLAST(ch));
+ edma_writel(edma, le32_to_cpu(tcd->nbytes), ®s->tcd[ch].nbytes);
+ edma_writel(edma, le32_to_cpu(tcd->slast), ®s->tcd[ch].slast);
- edma_writew(edma, le16_to_cpu(tcd->citer), addr + EDMA_TCD_CITER(ch));
- edma_writew(edma, le16_to_cpu(tcd->biter), addr + EDMA_TCD_BITER(ch));
- edma_writew(edma, le16_to_cpu(tcd->doff), addr + EDMA_TCD_DOFF(ch));
+ edma_writew(edma, le16_to_cpu(tcd->citer), ®s->tcd[ch].citer);
+ edma_writew(edma, le16_to_cpu(tcd->biter), ®s->tcd[ch].biter);
+ edma_writew(edma, le16_to_cpu(tcd->doff), ®s->tcd[ch].doff);
- edma_writel(edma,
- le32_to_cpu(tcd->dlast_sga), addr + EDMA_TCD_DLAST_SGA(ch));
+ edma_writel(edma, le32_to_cpu(tcd->dlast_sga),
+ ®s->tcd[ch].dlast_sga);
- edma_writew(edma, le16_to_cpu(tcd->csr), addr + EDMA_TCD_CSR(ch));
+ edma_writew(edma, le16_to_cpu(tcd->csr), ®s->tcd[ch].csr);
}
static inline
@@ -332,15 +362,15 @@ void fsl_edma_fill_tcd(struct fsl_edma_hw_tcd *tcd, u32 src, u32 dst,
tcd->attr = cpu_to_le16(attr);
- tcd->soff = cpu_to_le16(EDMA_TCD_SOFF_SOFF(soff));
+ tcd->soff = cpu_to_le16(soff);
- tcd->nbytes = cpu_to_le32(EDMA_TCD_NBYTES_NBYTES(nbytes));
- tcd->slast = cpu_to_le32(EDMA_TCD_SLAST_SLAST(slast));
+ tcd->nbytes = cpu_to_le32(nbytes);
+ tcd->slast = cpu_to_le32(slast);
tcd->citer = cpu_to_le16(EDMA_TCD_CITER_CITER(citer));
- tcd->doff = cpu_to_le16(EDMA_TCD_DOFF_DOFF(doff));
+ tcd->doff = cpu_to_le16(doff);
- tcd->dlast_sga = cpu_to_le32(EDMA_TCD_DLAST_SGA_DLAST_SGA(dlast_sga));
+ tcd->dlast_sga = cpu_to_le32(dlast_sga);
tcd->biter = cpu_to_le16(EDMA_TCD_BITER_BITER(biter));
if (major_int)
@@ -573,4 +603,52 @@ void fsl_edma_cleanup_vchan(struct dma_device *dmadev)
}
EXPORT_SYMBOL_GPL(fsl_edma_cleanup_vchan);
+/*
+ * On the 32 channels Vybrid/mpc577x edma version (here called "v1"),
+ * register offsets are different compared to ColdFire mcf5441x 64 channels
+ * edma (here called "v2").
+ *
+ * This function sets up register offsets as per proper declared version
+ * so must be called in xxx_edma_probe() just after setting the
+ * edma "version" and "membase" appropriately.
+ */
+void fsl_edma_setup_regs(struct fsl_edma_engine *edma)
+{
+ edma->regs.cr = edma->membase + EDMA_CR;
+ edma->regs.es = edma->membase + EDMA_ES;
+ edma->regs.erql = edma->membase + EDMA_ERQ;
+ edma->regs.eeil = edma->membase + EDMA_EEI;
+
+ edma->regs.serq = edma->membase + ((edma->version == v1) ?
+ EDMA_SERQ : EDMA64_SERQ);
+ edma->regs.cerq = edma->membase + ((edma->version == v1) ?
+ EDMA_CERQ : EDMA64_CERQ);
+ edma->regs.seei = edma->membase + ((edma->version == v1) ?
+ EDMA_SEEI : EDMA64_SEEI);
+ edma->regs.ceei = edma->membase + ((edma->version == v1) ?
+ EDMA_CEEI : EDMA64_CEEI);
+ edma->regs.cint = edma->membase + ((edma->version == v1) ?
+ EDMA_CINT : EDMA64_CINT);
+ edma->regs.cerr = edma->membase + ((edma->version == v1) ?
+ EDMA_CERR : EDMA64_CERR);
+ edma->regs.ssrt = edma->membase + ((edma->version == v1) ?
+ EDMA_SSRT : EDMA64_SSRT);
+ edma->regs.cdne = edma->membase + ((edma->version == v1) ?
+ EDMA_CDNE : EDMA64_CDNE);
+ edma->regs.intl = edma->membase + ((edma->version == v1) ?
+ EDMA_INTR : EDMA64_INTL);
+ edma->regs.errl = edma->membase + ((edma->version == v1) ?
+ EDMA_ERR : EDMA64_ERRL);
+
+ if (edma->version == v2) {
+ edma->regs.erqh = edma->membase + EDMA64_ERQH;
+ edma->regs.eeih = edma->membase + EDMA64_EEIH;
+ edma->regs.errh = edma->membase + EDMA64_ERRH;
+ edma->regs.inth = edma->membase + EDMA64_INTH;
+ }
+
+ edma->regs.tcd = edma->membase + EDMA_TCD;
+}
+EXPORT_SYMBOL_GPL(fsl_edma_setup_regs);
+
MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h
index f3ea68e15b23..7a9231e7639f 100644
--- a/drivers/dma/fsl-edma-common.h
+++ b/drivers/dma/fsl-edma-common.h
@@ -8,35 +8,6 @@
#include "virt-dma.h"
-#define EDMA_CR 0x00
-#define EDMA_ES 0x04
-#define EDMA_ERQ 0x0C
-#define EDMA_EEI 0x14
-#define EDMA_SERQ 0x1B
-#define EDMA_CERQ 0x1A
-#define EDMA_SEEI 0x19
-#define EDMA_CEEI 0x18
-#define EDMA_CINT 0x1F
-#define EDMA_CERR 0x1E
-#define EDMA_SSRT 0x1D
-#define EDMA_CDNE 0x1C
-#define EDMA_INTR 0x24
-#define EDMA_ERR 0x2C
-
-#define EDMA_TCD_SADDR(x) (0x1000 + 32 * (x))
-#define EDMA_TCD_SOFF(x) (0x1004 + 32 * (x))
-#define EDMA_TCD_ATTR(x) (0x1006 + 32 * (x))
-#define EDMA_TCD_NBYTES(x) (0x1008 + 32 * (x))
-#define EDMA_TCD_SLAST(x) (0x100C + 32 * (x))
-#define EDMA_TCD_DADDR(x) (0x1010 + 32 * (x))
-#define EDMA_TCD_DOFF(x) (0x1014 + 32 * (x))
-#define EDMA_TCD_CITER_ELINK(x) (0x1016 + 32 * (x))
-#define EDMA_TCD_CITER(x) (0x1016 + 32 * (x))
-#define EDMA_TCD_DLAST_SGA(x) (0x1018 + 32 * (x))
-#define EDMA_TCD_CSR(x) (0x101C + 32 * (x))
-#define EDMA_TCD_BITER_ELINK(x) (0x101E + 32 * (x))
-#define EDMA_TCD_BITER(x) (0x101E + 32 * (x))
-
#define EDMA_CR_EDBG BIT(1)
#define EDMA_CR_ERCA BIT(2)
#define EDMA_CR_ERGA BIT(3)
@@ -47,34 +18,29 @@
#define EDMA_CR_ECX BIT(16)
#define EDMA_CR_CX BIT(17)
-#define EDMA_SEEI_SEEI(x) ((x) & 0x1F)
-#define EDMA_CEEI_CEEI(x) ((x) & 0x1F)
-#define EDMA_CINT_CINT(x) ((x) & 0x1F)
-#define EDMA_CERR_CERR(x) ((x) & 0x1F)
-
-#define EDMA_TCD_ATTR_DSIZE(x) (((x) & 0x0007))
-#define EDMA_TCD_ATTR_DMOD(x) (((x) & 0x001F) << 3)
-#define EDMA_TCD_ATTR_SSIZE(x) (((x) & 0x0007) << 8)
-#define EDMA_TCD_ATTR_SMOD(x) (((x) & 0x001F) << 11)
-#define EDMA_TCD_ATTR_SSIZE_8BIT (0x0000)
-#define EDMA_TCD_ATTR_SSIZE_16BIT (0x0100)
-#define EDMA_TCD_ATTR_SSIZE_32BIT (0x0200)
-#define EDMA_TCD_ATTR_SSIZE_64BIT (0x0300)
-#define EDMA_TCD_ATTR_SSIZE_32BYTE (0x0500)
-#define EDMA_TCD_ATTR_DSIZE_8BIT (0x0000)
-#define EDMA_TCD_ATTR_DSIZE_16BIT (0x0001)
-#define EDMA_TCD_ATTR_DSIZE_32BIT (0x0002)
-#define EDMA_TCD_ATTR_DSIZE_64BIT (0x0003)
-#define EDMA_TCD_ATTR_DSIZE_32BYTE (0x0005)
-
-#define EDMA_TCD_SOFF_SOFF(x) (x)
-#define EDMA_TCD_NBYTES_NBYTES(x) (x)
-#define EDMA_TCD_SLAST_SLAST(x) (x)
-#define EDMA_TCD_DADDR_DADDR(x) (x)
-#define EDMA_TCD_CITER_CITER(x) ((x) & 0x7FFF)
-#define EDMA_TCD_DOFF_DOFF(x) (x)
-#define EDMA_TCD_DLAST_SGA_DLAST_SGA(x) (x)
-#define EDMA_TCD_BITER_BITER(x) ((x) & 0x7FFF)
+#define EDMA_SEEI_SEEI(x) ((x) & GENMASK(4, 0))
+#define EDMA_CEEI_CEEI(x) ((x) & GENMASK(4, 0))
+#define EDMA_CINT_CINT(x) ((x) & GENMASK(4, 0))
+#define EDMA_CERR_CERR(x) ((x) & GENMASK(4, 0))
+
+#define EDMA_TCD_ATTR_DSIZE(x) (((x) & GENMASK(2, 0)))
+#define EDMA_TCD_ATTR_DMOD(x) (((x) & GENMASK(4, 0)) << 3)
+#define EDMA_TCD_ATTR_SSIZE(x) (((x) & GENMASK(2, 0)) << 8)
+#define EDMA_TCD_ATTR_SMOD(x) (((x) & GENMASK(4, 0)) << 11)
+
+#define EDMA_TCD_ATTR_DSIZE_8BIT 0
+#define EDMA_TCD_ATTR_DSIZE_16BIT BIT(0)
+#define EDMA_TCD_ATTR_DSIZE_32BIT BIT(1)
+#define EDMA_TCD_ATTR_DSIZE_64BIT (BIT(0) | BIT(1))
+#define EDMA_TCD_ATTR_DSIZE_32BYTE (BIT(3) | BIT(0))
+#define EDMA_TCD_ATTR_SSIZE_8BIT 0
+#define EDMA_TCD_ATTR_SSIZE_16BIT (EDMA_TCD_ATTR_DSIZE_16BIT << 8)
+#define EDMA_TCD_ATTR_SSIZE_32BIT (EDMA_TCD_ATTR_DSIZE_32BIT << 8)
+#define EDMA_TCD_ATTR_SSIZE_64BIT (EDMA_TCD_ATTR_DSIZE_64BIT << 8)
+#define EDMA_TCD_ATTR_SSIZE_32BYTE (EDMA_TCD_ATTR_DSIZE_32BYTE << 8)
+
+#define EDMA_TCD_CITER_CITER(x) ((x) & GENMASK(14, 0))
+#define EDMA_TCD_BITER_BITER(x) ((x) & GENMASK(14, 0))
#define EDMA_TCD_CSR_START BIT(0)
#define EDMA_TCD_CSR_INT_MAJOR BIT(1)
@@ -87,7 +53,7 @@
#define EDMAMUX_CHCFG_DIS 0x0
#define EDMAMUX_CHCFG_ENBL 0x80
-#define EDMAMUX_CHCFG_SOURCE(n) ((n) & 0x3F)
+#define EDMAMUX_CHCFG_SOURCE(n) ((n) & GENMASK(6, 0))
#define DMAMUX_NR 2
@@ -114,6 +80,31 @@ struct fsl_edma_hw_tcd {
__le16 biter;
};
+/*
+ * This are iomem pointers, for both v32 and v64.
+ */
+struct edma_regs {
+ void __iomem *cr;
+ void __iomem *es;
+ void __iomem *erqh;
+ void __iomem *erql; /* aka erq on v32 */
+ void __iomem *eeih;
+ void __iomem *eeil; /* aka eei on v32 */
+ void __iomem *seei;
+ void __iomem *ceei;
+ void __iomem *serq;
+ void __iomem *cerq;
+ void __iomem *cint;
+ void __iomem *cerr;
+ void __iomem *ssrt;
+ void __iomem *cdne;
+ void __iomem *inth;
+ void __iomem *intl;
+ void __iomem *errh;
+ void __iomem *errl;
+ struct fsl_edma_hw_tcd __iomem *tcd;
+};
+
struct fsl_edma_sw_tcd {
dma_addr_t ptcd;
struct fsl_edma_hw_tcd *vtcd;
@@ -147,6 +138,11 @@ struct fsl_edma_desc {
struct fsl_edma_sw_tcd tcd[];
};
+enum edma_version {
+ v1, /* 32ch, Vybdir, mpc57x, etc */
+ v2, /* 64ch Coldfire */
+};
+
struct fsl_edma_engine {
struct dma_device dma_dev;
void __iomem *membase;
@@ -157,6 +153,8 @@ struct fsl_edma_engine {
int txirq;
int errirq;
bool big_endian;
+ enum edma_version version;
+ struct edma_regs regs;
struct fsl_edma_chan chans[];
};
@@ -192,5 +190,6 @@ void fsl_edma_issue_pending(struct dma_chan *chan);
int fsl_edma_alloc_chan_resources(struct dma_chan *chan);
void fsl_edma_free_chan_resources(struct dma_chan *chan);
void fsl_edma_cleanup_vchan(struct dma_device *dmadev);
+void fsl_edma_setup_regs(struct fsl_edma_engine *edma);
#endif /* _FSL_EDMA_COMMON_H_ */
diff --git a/drivers/dma/fsl-edma.c b/drivers/dma/fsl-edma.c
index 337ad0c0ea78..34d70112fcc9 100644
--- a/drivers/dma/fsl-edma.c
+++ b/drivers/dma/fsl-edma.c
@@ -28,19 +28,16 @@ static irqreturn_t fsl_edma_tx_handler(int irq, void *dev_id)
{
struct fsl_edma_engine *fsl_edma = dev_id;
unsigned int intr, ch;
- void __iomem *base_addr;
+ struct edma_regs *regs = &fsl_edma->regs;
struct fsl_edma_chan *fsl_chan;
- base_addr = fsl_edma->membase;
-
- intr = edma_readl(fsl_edma, base_addr + EDMA_INTR);
+ intr = edma_readl(fsl_edma, regs->intl);
if (!intr)
return IRQ_NONE;
for (ch = 0; ch < fsl_edma->n_chans; ch++) {
if (intr & (0x1 << ch)) {
- edma_writeb(fsl_edma, EDMA_CINT_CINT(ch),
- base_addr + EDMA_CINT);
+ edma_writeb(fsl_edma, EDMA_CINT_CINT(ch), regs->cint);
fsl_chan = &fsl_edma->chans[ch];
@@ -68,16 +65,16 @@ static irqreturn_t fsl_edma_err_handler(int irq, void *dev_id)
{
struct fsl_edma_engine *fsl_edma = dev_id;
unsigned int err, ch;
+ struct edma_regs *regs = &fsl_edma->regs;
- err = edma_readl(fsl_edma, fsl_edma->membase + EDMA_ERR);
+ err = edma_readl(fsl_edma, regs->errl);
if (!err)
return IRQ_NONE;
for (ch = 0; ch < fsl_edma->n_chans; ch++) {
if (err & (0x1 << ch)) {
fsl_edma_disable_request(&fsl_edma->chans[ch]);
- edma_writeb(fsl_edma, EDMA_CERR_CERR(ch),
- fsl_edma->membase + EDMA_CERR);
+ edma_writeb(fsl_edma, EDMA_CERR_CERR(ch), regs->cerr);
fsl_edma->chans[ch].status = DMA_ERROR;
fsl_edma->chans[ch].idle = true;
}
@@ -192,6 +189,7 @@ static int fsl_edma_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct fsl_edma_engine *fsl_edma;
struct fsl_edma_chan *fsl_chan;
+ struct edma_regs *regs;
struct resource *res;
int len, chans;
int ret, i;
@@ -207,6 +205,7 @@ static int fsl_edma_probe(struct platform_device *pdev)
if (!fsl_edma)
return -ENOMEM;
+ fsl_edma->version = v1;
fsl_edma->n_chans = chans;
mutex_init(&fsl_edma->fsl_edma_mutex);
@@ -215,6 +214,9 @@ static int fsl_edma_probe(struct platform_device *pdev)
if (IS_ERR(fsl_edma->membase))
return PTR_ERR(fsl_edma->membase);
+ fsl_edma_setup_regs(fsl_edma);
+ regs = &fsl_edma->regs;
+
for (i = 0; i < DMAMUX_NR; i++) {
char clkname[32];
@@ -255,11 +257,11 @@ static int fsl_edma_probe(struct platform_device *pdev)
fsl_chan->vchan.desc_free = fsl_edma_free_desc;
vchan_init(&fsl_chan->vchan, &fsl_edma->dma_dev);
- edma_writew(fsl_edma, 0x0, fsl_edma->membase + EDMA_TCD_CSR(i));
+ edma_writew(fsl_edma, 0x0, ®s->tcd[i].csr);
fsl_edma_chan_mux(fsl_chan, 0, false);
}
- edma_writel(fsl_edma, ~0, fsl_edma->membase + EDMA_INTR);
+ edma_writel(fsl_edma, ~0, regs->intl);
ret = fsl_edma_irq_init(pdev, fsl_edma);
if (ret)
return ret;
@@ -306,7 +308,7 @@ static int fsl_edma_probe(struct platform_device *pdev)
}
/* enable round robin arbitration */
- edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, fsl_edma->membase + EDMA_CR);
+ edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);
return 0;
}
@@ -353,18 +355,18 @@ static int fsl_edma_resume_early(struct device *dev)
{
struct fsl_edma_engine *fsl_edma = dev_get_drvdata(dev);
struct fsl_edma_chan *fsl_chan;
+ struct edma_regs *regs = &fsl_edma->regs;
int i;
for (i = 0; i < fsl_edma->n_chans; i++) {
fsl_chan = &fsl_edma->chans[i];
fsl_chan->pm_state = RUNNING;
- edma_writew(fsl_edma, 0x0, fsl_edma->membase + EDMA_TCD_CSR(i));
+ edma_writew(fsl_edma, 0x0, ®s->tcd[i].csr);
if (fsl_chan->slave_id != 0)
fsl_edma_chan_mux(fsl_chan, fsl_chan->slave_id, true);
}
- edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA,
- fsl_edma->membase + EDMA_CR);
+ edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);
return 0;
}
--
2.18.0
WARNING: multiple messages have this Message-ID (diff)
From: angelo@sysam.it (Angelo Dureghello)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 2/3] dmaengine: fsl-edma: add edma version and configurable registers
Date: Fri, 3 Aug 2018 21:32:43 +0200 [thread overview]
Message-ID: <20180803193244.12084-2-angelo@sysam.it> (raw)
In-Reply-To: <20180803193244.12084-1-angelo@sysam.it>
This patch adds configurable registers (using __iomem addresses)
to allow the use of fsl-edma-common code with slightly different
edma module versions, as Vybrid (v1) and ColdFire (v2) are.
Removal of old membase-referenced registers, amd some fixes on
macroes are included.
Signed-off-by: Angelo Dureghello <angelo@sysam.it>
---
Changes from v7:
- patch rewritten from scratch, this patch (2/3) has just been added.
---
drivers/dma/fsl-edma-common.c | 138 ++++++++++++++++++++++++++--------
drivers/dma/fsl-edma-common.h | 115 ++++++++++++++--------------
drivers/dma/fsl-edma.c | 32 ++++----
3 files changed, 182 insertions(+), 103 deletions(-)
diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index 0ae7094f477a..948a3ee51bbb 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -9,6 +9,38 @@
#include "fsl-edma-common.h"
+#define EDMA_CR 0x00
+#define EDMA_ES 0x04
+#define EDMA_ERQ 0x0C
+#define EDMA_EEI 0x14
+#define EDMA_SERQ 0x1B
+#define EDMA_CERQ 0x1A
+#define EDMA_SEEI 0x19
+#define EDMA_CEEI 0x18
+#define EDMA_CINT 0x1F
+#define EDMA_CERR 0x1E
+#define EDMA_SSRT 0x1D
+#define EDMA_CDNE 0x1C
+#define EDMA_INTR 0x24
+#define EDMA_ERR 0x2C
+
+#define EDMA64_ERQH 0x08
+#define EDMA64_EEIH 0x10
+#define EDMA64_SERQ 0x18
+#define EDMA64_CERQ 0x19
+#define EDMA64_SEEI 0x1a
+#define EDMA64_CEEI 0x1b
+#define EDMA64_CINT 0x1c
+#define EDMA64_CERR 0x1d
+#define EDMA64_SSRT 0x1e
+#define EDMA64_CDNE 0x1f
+#define EDMA64_INTH 0x20
+#define EDMA64_INTL 0x24
+#define EDMA64_ERRH 0x28
+#define EDMA64_ERRL 0x2c
+
+#define EDMA_TCD 0x1000
+
/*
* R/W functions for big- or little-endian registers:
* The eDMA controller's endian is independent of the CPU core's endian.
@@ -67,20 +99,20 @@ EXPORT_SYMBOL_GPL(to_fsl_edma_desc);
static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan)
{
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
- edma_writeb(fsl_chan->edma, EDMA_SEEI_SEEI(ch), addr + EDMA_SEEI);
- edma_writeb(fsl_chan->edma, ch, addr + EDMA_SERQ);
+ edma_writeb(fsl_chan->edma, EDMA_SEEI_SEEI(ch), regs->seei);
+ edma_writeb(fsl_chan->edma, ch, regs->serq);
}
void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan)
{
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
- edma_writeb(fsl_chan->edma, ch, addr + EDMA_CERQ);
- edma_writeb(fsl_chan->edma, EDMA_CEEI_CEEI(ch), addr + EDMA_CEEI);
+ edma_writeb(fsl_chan->edma, ch, regs->cerq);
+ edma_writeb(fsl_chan->edma, EDMA_CEEI_CEEI(ch), regs->ceei);
}
EXPORT_SYMBOL_GPL(fsl_edma_disable_request);
@@ -208,7 +240,7 @@ static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan,
struct virt_dma_desc *vdesc, bool in_progress)
{
struct fsl_edma_desc *edesc = fsl_chan->edesc;
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
enum dma_transfer_direction dir = fsl_chan->fsc.dir;
dma_addr_t cur_addr, dma_addr;
@@ -224,11 +256,9 @@ static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan,
return len;
if (dir == DMA_MEM_TO_DEV)
- cur_addr = edma_readl(
- fsl_chan->edma, addr + EDMA_TCD_SADDR(ch));
+ cur_addr = edma_readl(fsl_chan->edma, ®s->tcd[ch].saddr);
else
- cur_addr = edma_readl(
- fsl_chan->edma, addr + EDMA_TCD_DADDR(ch));
+ cur_addr = edma_readl(fsl_chan->edma, ®s->tcd[ch].daddr);
/* figure out the finished and calculate the residue */
for (i = 0; i < fsl_chan->edesc->n_tcds; i++) {
@@ -285,7 +315,7 @@ static void fsl_edma_set_tcd_regs(struct fsl_edma_chan *fsl_chan,
struct fsl_edma_hw_tcd *tcd)
{
struct fsl_edma_engine *edma = fsl_chan->edma;
- void __iomem *addr = fsl_chan->edma->membase;
+ struct edma_regs *regs = &fsl_chan->edma->regs;
u32 ch = fsl_chan->vchan.chan.chan_id;
/*
@@ -293,24 +323,24 @@ static void fsl_edma_set_tcd_regs(struct fsl_edma_chan *fsl_chan,
* endian format. However, we need to load the TCD registers in
* big- or little-endian obeying the eDMA engine model endian.
*/
- edma_writew(edma, 0, addr + EDMA_TCD_CSR(ch));
- edma_writel(edma, le32_to_cpu(tcd->saddr), addr + EDMA_TCD_SADDR(ch));
- edma_writel(edma, le32_to_cpu(tcd->daddr), addr + EDMA_TCD_DADDR(ch));
+ edma_writew(edma, 0, ®s->tcd[ch].csr);
+ edma_writel(edma, le32_to_cpu(tcd->saddr), ®s->tcd[ch].saddr);
+ edma_writel(edma, le32_to_cpu(tcd->daddr), ®s->tcd[ch].daddr);
- edma_writew(edma, le16_to_cpu(tcd->attr), addr + EDMA_TCD_ATTR(ch));
- edma_writew(edma, le16_to_cpu(tcd->soff), addr + EDMA_TCD_SOFF(ch));
+ edma_writew(edma, le16_to_cpu(tcd->attr), ®s->tcd[ch].attr);
+ edma_writew(edma, le16_to_cpu(tcd->soff), ®s->tcd[ch].soff);
- edma_writel(edma, le32_to_cpu(tcd->nbytes), addr + EDMA_TCD_NBYTES(ch));
- edma_writel(edma, le32_to_cpu(tcd->slast), addr + EDMA_TCD_SLAST(ch));
+ edma_writel(edma, le32_to_cpu(tcd->nbytes), ®s->tcd[ch].nbytes);
+ edma_writel(edma, le32_to_cpu(tcd->slast), ®s->tcd[ch].slast);
- edma_writew(edma, le16_to_cpu(tcd->citer), addr + EDMA_TCD_CITER(ch));
- edma_writew(edma, le16_to_cpu(tcd->biter), addr + EDMA_TCD_BITER(ch));
- edma_writew(edma, le16_to_cpu(tcd->doff), addr + EDMA_TCD_DOFF(ch));
+ edma_writew(edma, le16_to_cpu(tcd->citer), ®s->tcd[ch].citer);
+ edma_writew(edma, le16_to_cpu(tcd->biter), ®s->tcd[ch].biter);
+ edma_writew(edma, le16_to_cpu(tcd->doff), ®s->tcd[ch].doff);
- edma_writel(edma,
- le32_to_cpu(tcd->dlast_sga), addr + EDMA_TCD_DLAST_SGA(ch));
+ edma_writel(edma, le32_to_cpu(tcd->dlast_sga),
+ ®s->tcd[ch].dlast_sga);
- edma_writew(edma, le16_to_cpu(tcd->csr), addr + EDMA_TCD_CSR(ch));
+ edma_writew(edma, le16_to_cpu(tcd->csr), ®s->tcd[ch].csr);
}
static inline
@@ -332,15 +362,15 @@ void fsl_edma_fill_tcd(struct fsl_edma_hw_tcd *tcd, u32 src, u32 dst,
tcd->attr = cpu_to_le16(attr);
- tcd->soff = cpu_to_le16(EDMA_TCD_SOFF_SOFF(soff));
+ tcd->soff = cpu_to_le16(soff);
- tcd->nbytes = cpu_to_le32(EDMA_TCD_NBYTES_NBYTES(nbytes));
- tcd->slast = cpu_to_le32(EDMA_TCD_SLAST_SLAST(slast));
+ tcd->nbytes = cpu_to_le32(nbytes);
+ tcd->slast = cpu_to_le32(slast);
tcd->citer = cpu_to_le16(EDMA_TCD_CITER_CITER(citer));
- tcd->doff = cpu_to_le16(EDMA_TCD_DOFF_DOFF(doff));
+ tcd->doff = cpu_to_le16(doff);
- tcd->dlast_sga = cpu_to_le32(EDMA_TCD_DLAST_SGA_DLAST_SGA(dlast_sga));
+ tcd->dlast_sga = cpu_to_le32(dlast_sga);
tcd->biter = cpu_to_le16(EDMA_TCD_BITER_BITER(biter));
if (major_int)
@@ -573,4 +603,52 @@ void fsl_edma_cleanup_vchan(struct dma_device *dmadev)
}
EXPORT_SYMBOL_GPL(fsl_edma_cleanup_vchan);
+/*
+ * On the 32 channels Vybrid/mpc577x edma version (here called "v1"),
+ * register offsets are different compared to ColdFire mcf5441x 64 channels
+ * edma (here called "v2").
+ *
+ * This function sets up register offsets as per proper declared version
+ * so must be called in xxx_edma_probe() just after setting the
+ * edma "version" and "membase" appropriately.
+ */
+void fsl_edma_setup_regs(struct fsl_edma_engine *edma)
+{
+ edma->regs.cr = edma->membase + EDMA_CR;
+ edma->regs.es = edma->membase + EDMA_ES;
+ edma->regs.erql = edma->membase + EDMA_ERQ;
+ edma->regs.eeil = edma->membase + EDMA_EEI;
+
+ edma->regs.serq = edma->membase + ((edma->version == v1) ?
+ EDMA_SERQ : EDMA64_SERQ);
+ edma->regs.cerq = edma->membase + ((edma->version == v1) ?
+ EDMA_CERQ : EDMA64_CERQ);
+ edma->regs.seei = edma->membase + ((edma->version == v1) ?
+ EDMA_SEEI : EDMA64_SEEI);
+ edma->regs.ceei = edma->membase + ((edma->version == v1) ?
+ EDMA_CEEI : EDMA64_CEEI);
+ edma->regs.cint = edma->membase + ((edma->version == v1) ?
+ EDMA_CINT : EDMA64_CINT);
+ edma->regs.cerr = edma->membase + ((edma->version == v1) ?
+ EDMA_CERR : EDMA64_CERR);
+ edma->regs.ssrt = edma->membase + ((edma->version == v1) ?
+ EDMA_SSRT : EDMA64_SSRT);
+ edma->regs.cdne = edma->membase + ((edma->version == v1) ?
+ EDMA_CDNE : EDMA64_CDNE);
+ edma->regs.intl = edma->membase + ((edma->version == v1) ?
+ EDMA_INTR : EDMA64_INTL);
+ edma->regs.errl = edma->membase + ((edma->version == v1) ?
+ EDMA_ERR : EDMA64_ERRL);
+
+ if (edma->version == v2) {
+ edma->regs.erqh = edma->membase + EDMA64_ERQH;
+ edma->regs.eeih = edma->membase + EDMA64_EEIH;
+ edma->regs.errh = edma->membase + EDMA64_ERRH;
+ edma->regs.inth = edma->membase + EDMA64_INTH;
+ }
+
+ edma->regs.tcd = edma->membase + EDMA_TCD;
+}
+EXPORT_SYMBOL_GPL(fsl_edma_setup_regs);
+
MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h
index f3ea68e15b23..7a9231e7639f 100644
--- a/drivers/dma/fsl-edma-common.h
+++ b/drivers/dma/fsl-edma-common.h
@@ -8,35 +8,6 @@
#include "virt-dma.h"
-#define EDMA_CR 0x00
-#define EDMA_ES 0x04
-#define EDMA_ERQ 0x0C
-#define EDMA_EEI 0x14
-#define EDMA_SERQ 0x1B
-#define EDMA_CERQ 0x1A
-#define EDMA_SEEI 0x19
-#define EDMA_CEEI 0x18
-#define EDMA_CINT 0x1F
-#define EDMA_CERR 0x1E
-#define EDMA_SSRT 0x1D
-#define EDMA_CDNE 0x1C
-#define EDMA_INTR 0x24
-#define EDMA_ERR 0x2C
-
-#define EDMA_TCD_SADDR(x) (0x1000 + 32 * (x))
-#define EDMA_TCD_SOFF(x) (0x1004 + 32 * (x))
-#define EDMA_TCD_ATTR(x) (0x1006 + 32 * (x))
-#define EDMA_TCD_NBYTES(x) (0x1008 + 32 * (x))
-#define EDMA_TCD_SLAST(x) (0x100C + 32 * (x))
-#define EDMA_TCD_DADDR(x) (0x1010 + 32 * (x))
-#define EDMA_TCD_DOFF(x) (0x1014 + 32 * (x))
-#define EDMA_TCD_CITER_ELINK(x) (0x1016 + 32 * (x))
-#define EDMA_TCD_CITER(x) (0x1016 + 32 * (x))
-#define EDMA_TCD_DLAST_SGA(x) (0x1018 + 32 * (x))
-#define EDMA_TCD_CSR(x) (0x101C + 32 * (x))
-#define EDMA_TCD_BITER_ELINK(x) (0x101E + 32 * (x))
-#define EDMA_TCD_BITER(x) (0x101E + 32 * (x))
-
#define EDMA_CR_EDBG BIT(1)
#define EDMA_CR_ERCA BIT(2)
#define EDMA_CR_ERGA BIT(3)
@@ -47,34 +18,29 @@
#define EDMA_CR_ECX BIT(16)
#define EDMA_CR_CX BIT(17)
-#define EDMA_SEEI_SEEI(x) ((x) & 0x1F)
-#define EDMA_CEEI_CEEI(x) ((x) & 0x1F)
-#define EDMA_CINT_CINT(x) ((x) & 0x1F)
-#define EDMA_CERR_CERR(x) ((x) & 0x1F)
-
-#define EDMA_TCD_ATTR_DSIZE(x) (((x) & 0x0007))
-#define EDMA_TCD_ATTR_DMOD(x) (((x) & 0x001F) << 3)
-#define EDMA_TCD_ATTR_SSIZE(x) (((x) & 0x0007) << 8)
-#define EDMA_TCD_ATTR_SMOD(x) (((x) & 0x001F) << 11)
-#define EDMA_TCD_ATTR_SSIZE_8BIT (0x0000)
-#define EDMA_TCD_ATTR_SSIZE_16BIT (0x0100)
-#define EDMA_TCD_ATTR_SSIZE_32BIT (0x0200)
-#define EDMA_TCD_ATTR_SSIZE_64BIT (0x0300)
-#define EDMA_TCD_ATTR_SSIZE_32BYTE (0x0500)
-#define EDMA_TCD_ATTR_DSIZE_8BIT (0x0000)
-#define EDMA_TCD_ATTR_DSIZE_16BIT (0x0001)
-#define EDMA_TCD_ATTR_DSIZE_32BIT (0x0002)
-#define EDMA_TCD_ATTR_DSIZE_64BIT (0x0003)
-#define EDMA_TCD_ATTR_DSIZE_32BYTE (0x0005)
-
-#define EDMA_TCD_SOFF_SOFF(x) (x)
-#define EDMA_TCD_NBYTES_NBYTES(x) (x)
-#define EDMA_TCD_SLAST_SLAST(x) (x)
-#define EDMA_TCD_DADDR_DADDR(x) (x)
-#define EDMA_TCD_CITER_CITER(x) ((x) & 0x7FFF)
-#define EDMA_TCD_DOFF_DOFF(x) (x)
-#define EDMA_TCD_DLAST_SGA_DLAST_SGA(x) (x)
-#define EDMA_TCD_BITER_BITER(x) ((x) & 0x7FFF)
+#define EDMA_SEEI_SEEI(x) ((x) & GENMASK(4, 0))
+#define EDMA_CEEI_CEEI(x) ((x) & GENMASK(4, 0))
+#define EDMA_CINT_CINT(x) ((x) & GENMASK(4, 0))
+#define EDMA_CERR_CERR(x) ((x) & GENMASK(4, 0))
+
+#define EDMA_TCD_ATTR_DSIZE(x) (((x) & GENMASK(2, 0)))
+#define EDMA_TCD_ATTR_DMOD(x) (((x) & GENMASK(4, 0)) << 3)
+#define EDMA_TCD_ATTR_SSIZE(x) (((x) & GENMASK(2, 0)) << 8)
+#define EDMA_TCD_ATTR_SMOD(x) (((x) & GENMASK(4, 0)) << 11)
+
+#define EDMA_TCD_ATTR_DSIZE_8BIT 0
+#define EDMA_TCD_ATTR_DSIZE_16BIT BIT(0)
+#define EDMA_TCD_ATTR_DSIZE_32BIT BIT(1)
+#define EDMA_TCD_ATTR_DSIZE_64BIT (BIT(0) | BIT(1))
+#define EDMA_TCD_ATTR_DSIZE_32BYTE (BIT(3) | BIT(0))
+#define EDMA_TCD_ATTR_SSIZE_8BIT 0
+#define EDMA_TCD_ATTR_SSIZE_16BIT (EDMA_TCD_ATTR_DSIZE_16BIT << 8)
+#define EDMA_TCD_ATTR_SSIZE_32BIT (EDMA_TCD_ATTR_DSIZE_32BIT << 8)
+#define EDMA_TCD_ATTR_SSIZE_64BIT (EDMA_TCD_ATTR_DSIZE_64BIT << 8)
+#define EDMA_TCD_ATTR_SSIZE_32BYTE (EDMA_TCD_ATTR_DSIZE_32BYTE << 8)
+
+#define EDMA_TCD_CITER_CITER(x) ((x) & GENMASK(14, 0))
+#define EDMA_TCD_BITER_BITER(x) ((x) & GENMASK(14, 0))
#define EDMA_TCD_CSR_START BIT(0)
#define EDMA_TCD_CSR_INT_MAJOR BIT(1)
@@ -87,7 +53,7 @@
#define EDMAMUX_CHCFG_DIS 0x0
#define EDMAMUX_CHCFG_ENBL 0x80
-#define EDMAMUX_CHCFG_SOURCE(n) ((n) & 0x3F)
+#define EDMAMUX_CHCFG_SOURCE(n) ((n) & GENMASK(6, 0))
#define DMAMUX_NR 2
@@ -114,6 +80,31 @@ struct fsl_edma_hw_tcd {
__le16 biter;
};
+/*
+ * This are iomem pointers, for both v32 and v64.
+ */
+struct edma_regs {
+ void __iomem *cr;
+ void __iomem *es;
+ void __iomem *erqh;
+ void __iomem *erql; /* aka erq on v32 */
+ void __iomem *eeih;
+ void __iomem *eeil; /* aka eei on v32 */
+ void __iomem *seei;
+ void __iomem *ceei;
+ void __iomem *serq;
+ void __iomem *cerq;
+ void __iomem *cint;
+ void __iomem *cerr;
+ void __iomem *ssrt;
+ void __iomem *cdne;
+ void __iomem *inth;
+ void __iomem *intl;
+ void __iomem *errh;
+ void __iomem *errl;
+ struct fsl_edma_hw_tcd __iomem *tcd;
+};
+
struct fsl_edma_sw_tcd {
dma_addr_t ptcd;
struct fsl_edma_hw_tcd *vtcd;
@@ -147,6 +138,11 @@ struct fsl_edma_desc {
struct fsl_edma_sw_tcd tcd[];
};
+enum edma_version {
+ v1, /* 32ch, Vybdir, mpc57x, etc */
+ v2, /* 64ch Coldfire */
+};
+
struct fsl_edma_engine {
struct dma_device dma_dev;
void __iomem *membase;
@@ -157,6 +153,8 @@ struct fsl_edma_engine {
int txirq;
int errirq;
bool big_endian;
+ enum edma_version version;
+ struct edma_regs regs;
struct fsl_edma_chan chans[];
};
@@ -192,5 +190,6 @@ void fsl_edma_issue_pending(struct dma_chan *chan);
int fsl_edma_alloc_chan_resources(struct dma_chan *chan);
void fsl_edma_free_chan_resources(struct dma_chan *chan);
void fsl_edma_cleanup_vchan(struct dma_device *dmadev);
+void fsl_edma_setup_regs(struct fsl_edma_engine *edma);
#endif /* _FSL_EDMA_COMMON_H_ */
diff --git a/drivers/dma/fsl-edma.c b/drivers/dma/fsl-edma.c
index 337ad0c0ea78..34d70112fcc9 100644
--- a/drivers/dma/fsl-edma.c
+++ b/drivers/dma/fsl-edma.c
@@ -28,19 +28,16 @@ static irqreturn_t fsl_edma_tx_handler(int irq, void *dev_id)
{
struct fsl_edma_engine *fsl_edma = dev_id;
unsigned int intr, ch;
- void __iomem *base_addr;
+ struct edma_regs *regs = &fsl_edma->regs;
struct fsl_edma_chan *fsl_chan;
- base_addr = fsl_edma->membase;
-
- intr = edma_readl(fsl_edma, base_addr + EDMA_INTR);
+ intr = edma_readl(fsl_edma, regs->intl);
if (!intr)
return IRQ_NONE;
for (ch = 0; ch < fsl_edma->n_chans; ch++) {
if (intr & (0x1 << ch)) {
- edma_writeb(fsl_edma, EDMA_CINT_CINT(ch),
- base_addr + EDMA_CINT);
+ edma_writeb(fsl_edma, EDMA_CINT_CINT(ch), regs->cint);
fsl_chan = &fsl_edma->chans[ch];
@@ -68,16 +65,16 @@ static irqreturn_t fsl_edma_err_handler(int irq, void *dev_id)
{
struct fsl_edma_engine *fsl_edma = dev_id;
unsigned int err, ch;
+ struct edma_regs *regs = &fsl_edma->regs;
- err = edma_readl(fsl_edma, fsl_edma->membase + EDMA_ERR);
+ err = edma_readl(fsl_edma, regs->errl);
if (!err)
return IRQ_NONE;
for (ch = 0; ch < fsl_edma->n_chans; ch++) {
if (err & (0x1 << ch)) {
fsl_edma_disable_request(&fsl_edma->chans[ch]);
- edma_writeb(fsl_edma, EDMA_CERR_CERR(ch),
- fsl_edma->membase + EDMA_CERR);
+ edma_writeb(fsl_edma, EDMA_CERR_CERR(ch), regs->cerr);
fsl_edma->chans[ch].status = DMA_ERROR;
fsl_edma->chans[ch].idle = true;
}
@@ -192,6 +189,7 @@ static int fsl_edma_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct fsl_edma_engine *fsl_edma;
struct fsl_edma_chan *fsl_chan;
+ struct edma_regs *regs;
struct resource *res;
int len, chans;
int ret, i;
@@ -207,6 +205,7 @@ static int fsl_edma_probe(struct platform_device *pdev)
if (!fsl_edma)
return -ENOMEM;
+ fsl_edma->version = v1;
fsl_edma->n_chans = chans;
mutex_init(&fsl_edma->fsl_edma_mutex);
@@ -215,6 +214,9 @@ static int fsl_edma_probe(struct platform_device *pdev)
if (IS_ERR(fsl_edma->membase))
return PTR_ERR(fsl_edma->membase);
+ fsl_edma_setup_regs(fsl_edma);
+ regs = &fsl_edma->regs;
+
for (i = 0; i < DMAMUX_NR; i++) {
char clkname[32];
@@ -255,11 +257,11 @@ static int fsl_edma_probe(struct platform_device *pdev)
fsl_chan->vchan.desc_free = fsl_edma_free_desc;
vchan_init(&fsl_chan->vchan, &fsl_edma->dma_dev);
- edma_writew(fsl_edma, 0x0, fsl_edma->membase + EDMA_TCD_CSR(i));
+ edma_writew(fsl_edma, 0x0, ®s->tcd[i].csr);
fsl_edma_chan_mux(fsl_chan, 0, false);
}
- edma_writel(fsl_edma, ~0, fsl_edma->membase + EDMA_INTR);
+ edma_writel(fsl_edma, ~0, regs->intl);
ret = fsl_edma_irq_init(pdev, fsl_edma);
if (ret)
return ret;
@@ -306,7 +308,7 @@ static int fsl_edma_probe(struct platform_device *pdev)
}
/* enable round robin arbitration */
- edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, fsl_edma->membase + EDMA_CR);
+ edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);
return 0;
}
@@ -353,18 +355,18 @@ static int fsl_edma_resume_early(struct device *dev)
{
struct fsl_edma_engine *fsl_edma = dev_get_drvdata(dev);
struct fsl_edma_chan *fsl_chan;
+ struct edma_regs *regs = &fsl_edma->regs;
int i;
for (i = 0; i < fsl_edma->n_chans; i++) {
fsl_chan = &fsl_edma->chans[i];
fsl_chan->pm_state = RUNNING;
- edma_writew(fsl_edma, 0x0, fsl_edma->membase + EDMA_TCD_CSR(i));
+ edma_writew(fsl_edma, 0x0, ®s->tcd[i].csr);
if (fsl_chan->slave_id != 0)
fsl_edma_chan_mux(fsl_chan, fsl_chan->slave_id, true);
}
- edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA,
- fsl_edma->membase + EDMA_CR);
+ edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);
return 0;
}
--
2.18.0
next reply other threads:[~2018-08-03 19:32 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-03 19:32 Angelo Dureghello [this message]
2018-08-03 19:32 ` [PATCH v8 2/3] dmaengine: fsl-edma: add edma version and configurable registers Angelo Dureghello
2018-08-03 19:32 ` Angelo Dureghello
-- strict thread matches above, loose matches on Subject: below --
2018-08-10 8:43 [v8,1/3] dmaengine: fsl-edma: extract common fsl-edma code (no changes in behavior intended) Angelo Dureghello
2018-08-10 8:43 ` [PATCH v8 1/3] " Angelo Dureghello
2018-08-10 8:43 ` Angelo Dureghello
2018-08-10 8:05 [v8,1/3] " Stefan Agner
2018-08-10 8:05 ` [PATCH v8 1/3] " Stefan Agner
2018-08-10 8:05 ` Stefan Agner
2018-08-09 22:37 [v8,1/3] " Angelo Dureghello
2018-08-09 22:37 ` [PATCH v8 1/3] " Angelo Dureghello
2018-08-09 22:37 ` Angelo Dureghello
2018-08-07 17:47 [v8,1/3] " Stefan Agner
2018-08-07 17:47 ` [PATCH v8 1/3] " Stefan Agner
2018-08-07 17:47 ` Stefan Agner
2018-08-07 12:14 [v8,1/3] " Krzysztof Kozlowski
2018-08-07 12:14 ` [PATCH v8 1/3] " Krzysztof Kozlowski
2018-08-07 12:14 ` Krzysztof Kozlowski
2018-08-07 8:08 [v8,1/3] " Stefan Agner
2018-08-07 8:08 ` [PATCH v8 1/3] " Stefan Agner
2018-08-07 8:08 ` Stefan Agner
2018-08-07 8:01 [v8,2/3] dmaengine: fsl-edma: add edma version and configurable registers Stefan Agner
2018-08-07 8:01 ` [PATCH v8 2/3] " Stefan Agner
2018-08-07 8:01 ` Stefan Agner
2018-08-07 6:02 [v8,1/3] dmaengine: fsl-edma: extract common fsl-edma code (no changes in behavior intended) Krzysztof Kozlowski
2018-08-07 6:02 ` [PATCH v8 1/3] " Krzysztof Kozlowski
2018-08-07 6:02 ` Krzysztof Kozlowski
2018-08-06 21:01 [v8,3/3] dmaengine: fsl-edma: add ColdFire mcf5441x edma support Angelo Dureghello
2018-08-06 21:01 ` [PATCH v8 3/3] " Angelo Dureghello
2018-08-06 21:01 ` Angelo Dureghello
2018-08-06 20:40 [v8,1/3] dmaengine: fsl-edma: extract common fsl-edma code (no changes in behavior intended) Angelo Dureghello
2018-08-06 20:40 ` [PATCH v8 1/3] " Angelo Dureghello
2018-08-06 20:40 ` Angelo Dureghello
2018-08-06 20:31 [v8,2/3] dmaengine: fsl-edma: add edma version and configurable registers Angelo Dureghello
2018-08-06 20:31 ` [PATCH v8 2/3] " Angelo Dureghello
2018-08-06 20:31 ` Angelo Dureghello
2018-08-06 20:23 [v8,3/3] dmaengine: fsl-edma: add ColdFire mcf5441x edma support Angelo Dureghello
2018-08-06 20:23 ` [PATCH v8 3/3] " Angelo Dureghello
2018-08-06 20:23 ` Angelo Dureghello
2018-08-06 12:21 [v8,3/3] " Stefan Agner
2018-08-06 12:21 ` [PATCH v8 3/3] " Stefan Agner
2018-08-06 12:21 ` Stefan Agner
2018-08-06 8:09 [v8,3/3] " Krzysztof Kozlowski
2018-08-06 8:09 ` [PATCH v8 3/3] " Krzysztof Kozlowski
2018-08-06 8:09 ` Krzysztof Kozlowski
2018-08-06 7:59 [v8,2/3] dmaengine: fsl-edma: add edma version and configurable registers Krzysztof Kozlowski
2018-08-06 7:59 ` [PATCH v8 2/3] " Krzysztof Kozlowski
2018-08-06 7:59 ` Krzysztof Kozlowski
2018-08-06 7:43 [v8,1/3] dmaengine: fsl-edma: extract common fsl-edma code (no changes in behavior intended) Krzysztof Kozlowski
2018-08-06 7:43 ` [PATCH v8 1/3] " Krzysztof Kozlowski
2018-08-06 7:43 ` Krzysztof Kozlowski
2018-08-03 19:32 [v8,3/3] dmaengine: fsl-edma: add ColdFire mcf5441x edma support Angelo Dureghello
2018-08-03 19:32 ` [PATCH v8 3/3] " Angelo Dureghello
2018-08-03 19:32 ` Angelo Dureghello
2018-08-03 19:32 [v8,1/3] dmaengine: fsl-edma: extract common fsl-edma code (no changes in behavior intended) Angelo Dureghello
2018-08-03 19:32 ` [PATCH v8 1/3] " Angelo Dureghello
2018-08-03 19:32 ` Angelo Dureghello
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180803193244.12084-2-angelo@sysam.it \
--to=angelo@sysam.it \
--cc=dmaengine@vger.kernel.org \
--cc=krzk@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-m68k@vger.kernel.org \
--cc=stefan@agner.ch \
--cc=vinod.koul@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.