On 3 August 2018 at 21:32, Angelo Dureghello <ang...@sysam.it> wrote:
> 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 <ang...@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)
This looks like a change for its own commit.
> +
> +#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.
s/This/These/
Tested-by: Krzysztof Kozlowski <k...@kernel.org>
Best regards,
Krzysztof
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