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[87.207.52.162]) by mx.google.com with ESMTPSA id nv4sm4838824bkb.3.2013.08.11.10.59.53 for (version=TLSv1.2 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 11 Aug 2013 10:59:55 -0700 (PDT) From: Tomasz Figa To: linux-samsung-soc@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, Dan Williams , Jaroslav Kysela , Kukjin Kim , Liam Girdwood , Linus Walleij , Mark Brown , Mike Turquette , Padmavathi Venna , Russell King , Sangbeom Kim , Takashi Iwai , Vinod Koul , Tomasz Figa Subject: [PATCH 06/18] dmaengine: PL08x: Add support for different maximum transfer size Date: Sun, 11 Aug 2013 19:59:18 +0200 Message-Id: <1376243970-6489-7-git-send-email-tomasz.figa@gmail.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1376243970-6489-1-git-send-email-tomasz.figa@gmail.com> References: <1376243970-6489-1-git-send-email-tomasz.figa@gmail.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-9.5 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP PL080S has separate register to store transfer size in, allowing single transfer to be much larger than in standard PL080. This patch makes the amba-pl08x driver aware of this and removes writing transfer size to reserved bits of CH_CONTROL register on PL080S, which was not a problem witn transfer sizes fitting the original bitfield of PL080, but now would overwrite other fields. Signed-off-by: Tomasz Figa Reviewed-by: Linus Walleij Acked by: Vinod Koul --- drivers/dma/amba-pl08x.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 75915be..4e4c3df 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -115,6 +115,7 @@ struct vendor_data { bool dualmaster; bool nomadik; bool pl080s; + u32 max_transfer_size; }; /** @@ -783,6 +784,7 @@ static inline u32 pl08x_cctl_bits(u32 cctl, u8 srcwidth, u8 dstwidth, break; } + tsize &= PL080_CONTROL_TRANSFER_SIZE_MASK; retbits |= tsize << PL080_CONTROL_TRANSFER_SIZE_SHIFT; return retbits; } @@ -1050,7 +1052,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x, * MIN(buswidths) */ max_bytes_per_lli = bd.srcbus.buswidth * - PL080_CONTROL_TRANSFER_SIZE_MASK; + pl08x->vd->max_transfer_size; dev_vdbg(&pl08x->adev->dev, "%s max bytes per lli = %zu\n", __func__, max_bytes_per_lli); @@ -2152,6 +2154,7 @@ static struct vendor_data vendor_pl080 = { .config_offset = PL080_CH_CONFIG, .channels = 8, .dualmaster = true, + .max_transfer_size = PL080_CONTROL_TRANSFER_SIZE_MASK, }; static struct vendor_data vendor_nomadik = { @@ -2159,18 +2162,21 @@ static struct vendor_data vendor_nomadik = { .channels = 8, .dualmaster = true, .nomadik = true, + .max_transfer_size = PL080_CONTROL_TRANSFER_SIZE_MASK, }; static struct vendor_data vendor_pl080s = { .config_offset = PL080S_CH_CONFIG, .channels = 8, .pl080s = true, + .max_transfer_size = PL080S_CONTROL_TRANSFER_SIZE_MASK, }; static struct vendor_data vendor_pl081 = { .config_offset = PL080_CH_CONFIG, .channels = 2, .dualmaster = false, + .max_transfer_size = PL080_CONTROL_TRANSFER_SIZE_MASK, }; static struct amba_id pl08x_ids[] = {