From patchwork Tue May 4 14:07:15 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guennadi Liakhovetski X-Patchwork-Id: 96800 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o44E7FWl018065 for ; Tue, 4 May 2010 14:07:15 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932371Ab0EDOHO (ORCPT ); Tue, 4 May 2010 10:07:14 -0400 Received: from mail.gmx.net ([213.165.64.20]:43650 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S932282Ab0EDOHN (ORCPT ); Tue, 4 May 2010 10:07:13 -0400 Received: (qmail invoked by alias); 04 May 2010 14:07:10 -0000 Received: from p57BD25F8.dip0.t-ipconnect.de (EHLO axis700.grange) [87.189.37.248] by mail.gmx.net (mp002) with SMTP; 04 May 2010 16:07:10 +0200 X-Authenticated: #20450766 X-Provags-ID: V01U2FsdGVkX1861GMBxSs6dHdZXIIRrLcEsfzrrk4+dbag22VRnY rHSa4FbVqLuGyK Received: from lyakh (helo=localhost) by axis700.grange with local-esmtp (Exim 4.63) (envelope-from ) id 1O9ImJ-00023N-CB; Tue, 04 May 2010 16:07:15 +0200 Date: Tue, 4 May 2010 16:07:15 +0200 (CEST) From: Guennadi Liakhovetski To: "linux-sh@vger.kernel.org" cc: linux-mmc@vger.kernel.org, Dan Williams , Ian Molton , Magnus Damm , linux-arm-kernel@lists.infradead.org Subject: [PATCH 9/9] ARM: add DMA support to sh7372, enable DMA for SDHI In-Reply-To: Message-ID: References: MIME-Version: 1.0 X-Y-GMX-Trusted: 0 X-FuHaFi: 0.42999999999999999 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Tue, 04 May 2010 14:07:15 +0000 (UTC) diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c index 66e195c..d2bb7b0 100644 --- a/arch/arm/mach-shmobile/board-ap4evb.c +++ b/arch/arm/mach-shmobile/board-ap4evb.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -208,6 +209,11 @@ static struct platform_device keysc_device = { }; /* SDHI0 */ +static struct sh_mobile_sdhi_info sdhi0_info = { + .dma_slave_tx = SHDMA_SLAVE_SDHI0_TX, + .dma_slave_rx = SHDMA_SLAVE_SDHI0_RX, +}; + static struct resource sdhi0_resources[] = { [0] = { .name = "SDHI0", @@ -226,6 +232,9 @@ static struct platform_device sdhi0_device = { .num_resources = ARRAY_SIZE(sdhi0_resources), .resource = sdhi0_resources, .id = 0, + .dev = { + .platform_data = &sdhi0_info, + }, }; static struct platform_device *ap4evb_devices[] __initdata = { diff --git a/arch/arm/mach-shmobile/include/mach/sh7372.h b/arch/arm/mach-shmobile/include/mach/sh7372.h index dc34f00..57e033a 100644 --- a/arch/arm/mach-shmobile/include/mach/sh7372.h +++ b/arch/arm/mach-shmobile/include/mach/sh7372.h @@ -431,4 +431,14 @@ enum { GPIO_FN_SDENC_DV_CLKI, }; +/* DMA slave IDs */ +enum { + SHDMA_SLAVE_SDHI0_RX, + SHDMA_SLAVE_SDHI0_TX, + SHDMA_SLAVE_SDHI1_RX, + SHDMA_SLAVE_SDHI1_TX, + SHDMA_SLAVE_SDHI2_RX, + SHDMA_SLAVE_SDHI2_TX, +}; + #endif /* __ASM_SH7372_H__ */ diff --git a/arch/arm/mach-shmobile/setup-sh7372.c b/arch/arm/mach-shmobile/setup-sh7372.c index 1bcd279..b2788d0 100644 --- a/arch/arm/mach-shmobile/setup-sh7372.c +++ b/arch/arm/mach-shmobile/setup-sh7372.c @@ -26,9 +26,11 @@ #include #include #include +#include #include #include #include +#include #include #include @@ -169,6 +171,224 @@ static struct platform_device cmt10_device = { .num_resources = ARRAY_SIZE(cmt10_resources), }; +/* DMA */ +/* Transmit sizes and respective CHCR register values */ +enum { + XMIT_SZ_8BIT = 0, + XMIT_SZ_16BIT = 1, + XMIT_SZ_32BIT = 2, + XMIT_SZ_64BIT = 7, + XMIT_SZ_128BIT = 3, + XMIT_SZ_256BIT = 4, + XMIT_SZ_512BIT = 5, +}; + +/* log2(size / 8) - used to calculate number of transfers */ +#define TS_SHIFT { \ + [XMIT_SZ_8BIT] = 0, \ + [XMIT_SZ_16BIT] = 1, \ + [XMIT_SZ_32BIT] = 2, \ + [XMIT_SZ_64BIT] = 3, \ + [XMIT_SZ_128BIT] = 4, \ + [XMIT_SZ_256BIT] = 5, \ + [XMIT_SZ_512BIT] = 6, \ +} + +#define TS_INDEX2VAL(i) ((((i) & 3) << 3) | \ + (((i) & 0xc) << (20 - 2))) + +static const struct sh_dmae_slave_config sh7724_dmae_slaves[] = { + { + .slave_id = SHDMA_SLAVE_SDHI0_TX, + .addr = 0xe6850030, + .chcr = DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT), + .mid_rid = 0xc1, + }, { + .slave_id = SHDMA_SLAVE_SDHI0_RX, + .addr = 0xe6850030, + .chcr = DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT), + .mid_rid = 0xc2, + }, { + .slave_id = SHDMA_SLAVE_SDHI1_TX, + .addr = 0xe6860030, + .chcr = DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT), + .mid_rid = 0xc9, + }, { + .slave_id = SHDMA_SLAVE_SDHI1_RX, + .addr = 0xe6860030, + .chcr = DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT), + .mid_rid = 0xca, + }, { + .slave_id = SHDMA_SLAVE_SDHI2_TX, + .addr = 0xe6870030, + .chcr = DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT), + .mid_rid = 0xcd, + }, { + .slave_id = SHDMA_SLAVE_SDHI2_RX, + .addr = 0xe6870030, + .chcr = DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT), + .mid_rid = 0xce, + }, +}; + +static const struct sh_dmae_channel sh7724_dmae_channels[] = { + { + .offset = 0, + .dmars = 0, + .dmars_bit = 0, + }, { + .offset = 0x10, + .dmars = 0, + .dmars_bit = 8, + }, { + .offset = 0x20, + .dmars = 4, + .dmars_bit = 0, + }, { + .offset = 0x30, + .dmars = 4, + .dmars_bit = 8, + }, { + .offset = 0x50, + .dmars = 8, + .dmars_bit = 0, + }, { + .offset = 0x60, + .dmars = 8, + .dmars_bit = 8, + } +}; + +static const unsigned int ts_shift[] = TS_SHIFT; + +static struct sh_dmae_pdata dma_platform_data = { + .slave = sh7724_dmae_slaves, + .slave_num = ARRAY_SIZE(sh7724_dmae_slaves), + .channel = sh7724_dmae_channels, + .channel_num = ARRAY_SIZE(sh7724_dmae_channels), + .ts_low_shift = 3, + .ts_low_mask = 0x18, + .ts_high_shift = (20 - 2), /* 2 bits for shifted low TS */ + .ts_high_mask = 0x00300000, + .ts_shift = ts_shift, + .ts_shift_num = ARRAY_SIZE(ts_shift), + .dmaor_init = DMAOR_DME, +}; + +/* Resource order important! */ +static struct resource sh7724_dmae0_resources[] = { + { + /* Channel registers and DMAOR */ + .start = 0xfe008020, + .end = 0xfe00808f, + .flags = IORESOURCE_MEM, + }, + { + /* DMARSx */ + .start = 0xfe009000, + .end = 0xfe00900b, + .flags = IORESOURCE_MEM, + }, + { + /* DMA error IRQ */ + .start = 246, + .end = 246, + .flags = IORESOURCE_IRQ, + }, + { + /* IRQ for channels 0-5 */ + .start = 240, + .end = 245, + .flags = IORESOURCE_IRQ, + }, +}; + +/* Resource order important! */ +static struct resource sh7724_dmae1_resources[] = { + { + /* Channel registers and DMAOR */ + .start = 0xfe018020, + .end = 0xfe01808f, + .flags = IORESOURCE_MEM, + }, + { + /* DMARSx */ + .start = 0xfe019000, + .end = 0xfe01900b, + .flags = IORESOURCE_MEM, + }, + { + /* DMA error IRQ */ + .start = 254, + .end = 254, + .flags = IORESOURCE_IRQ, + }, + { + /* IRQ for channels 0-5 */ + .start = 248, + .end = 253, + .flags = IORESOURCE_IRQ, + }, +}; + +/* Resource order important! */ +static struct resource sh7724_dmae2_resources[] = { + { + /* Channel registers and DMAOR */ + .start = 0xfe028020, + .end = 0xfe02808f, + .flags = IORESOURCE_MEM, + }, + { + /* DMARSx */ + .start = 0xfe029000, + .end = 0xfe02900b, + .flags = IORESOURCE_MEM, + }, + { + /* DMA error IRQ */ + .start = 262, + .end = 262, + .flags = IORESOURCE_IRQ, + }, + { + /* IRQ for channels 0-5 */ + .start = 256, + .end = 261, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device dma0_device = { + .name = "sh-dma-engine", + .id = 0, + .resource = sh7724_dmae0_resources, + .num_resources = ARRAY_SIZE(sh7724_dmae0_resources), + .dev = { + .platform_data = &dma_platform_data, + }, +}; + +static struct platform_device dma1_device = { + .name = "sh-dma-engine", + .id = 1, + .resource = sh7724_dmae1_resources, + .num_resources = ARRAY_SIZE(sh7724_dmae1_resources), + .dev = { + .platform_data = &dma_platform_data, + }, +}; + +static struct platform_device dma2_device = { + .name = "sh-dma-engine", + .id = 2, + .resource = sh7724_dmae2_resources, + .num_resources = ARRAY_SIZE(sh7724_dmae2_resources), + .dev = { + .platform_data = &dma_platform_data, + }, +}; + static struct platform_device *sh7372_early_devices[] __initdata = { &scif0_device, &scif1_device, @@ -178,6 +398,9 @@ static struct platform_device *sh7372_early_devices[] __initdata = { &scif5_device, &scif6_device, &cmt10_device, + &dma0_device, + &dma1_device, + &dma2_device, }; void __init sh7372_add_standard_devices(void)