From patchwork Tue Aug 13 07:50:15 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabu Thangamuthu X-Patchwork-Id: 2843507 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 790DDBF546 for ; Tue, 13 Aug 2013 07:50:27 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1C699203EB for ; Tue, 13 Aug 2013 07:50:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CCF8B203DD for ; Tue, 13 Aug 2013 07:50:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753964Ab3HMHuX (ORCPT ); Tue, 13 Aug 2013 03:50:23 -0400 Received: from us01smtp2.synopsys.com ([198.182.44.80]:64832 "EHLO kiruna.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755546Ab3HMHuV convert rfc822-to-8bit (ORCPT ); Tue, 13 Aug 2013 03:50:21 -0400 Received: from mailhost.synopsys.com (mailhost3.synopsys.com [10.12.238.238]) by kiruna.synopsys.com (Postfix) with ESMTP id EAD3FFBC5; Tue, 13 Aug 2013 00:50:20 -0700 (PDT) Received: from mailhost.synopsys.com (localhost [127.0.0.1]) by mailhost.synopsys.com (Postfix) with ESMTP id B376A31E; Tue, 13 Aug 2013 00:50:20 -0700 (PDT) Received: from us01wehtc1.internal.synopsys.com (us01wehtc1-vip.internal.synopsys.com [10.12.239.236]) by mailhost.synopsys.com (Postfix) with ESMTP id 8ACE031C; Tue, 13 Aug 2013 00:50:20 -0700 (PDT) Received: from IN01WEHTCB.internal.synopsys.com (10.144.199.105) by us01wehtc1.internal.synopsys.com (10.12.239.235) with Microsoft SMTP Server (TLS) id 14.2.298.4; Tue, 13 Aug 2013 00:50:20 -0700 Received: from IN01WEMBXB.internal.synopsys.com ([fe80::2045:a6e1:6d83:f53a]) by IN01WEHTCB.internal.synopsys.com ([::1]) with mapi id 14.02.0298.004; Tue, 13 Aug 2013 13:20:16 +0530 From: Prabu Thangamuthu To: Chris Ball , Seungwon Jeon , Jaehoon Chung CC: "linux-mmc@vger.kernel.org" , "Manjunath M Bettegowda" , "prabu.t@synopsys.com" Subject: [PATCH 1/1] mmc: dw_mmc: Add IDMAC 64-bit addressing mode support Thread-Topic: [PATCH 1/1] mmc: dw_mmc: Add IDMAC 64-bit addressing mode support Thread-Index: Ac6X+b9Ig209w1WjRsiLc3un/hg6zA== Date: Tue, 13 Aug 2013 07:50:15 +0000 Message-ID: <705D14B1C7978B40A723277C067CEDE2CD75FE@IN01WEMBXB.internal.synopsys.com> Accept-Language: en-US, en-IN Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.144.164.174] MIME-Version: 1.0 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-9.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 Synopsys DW_MMC IP core supports Internal DMA Controller with 64-bit address mode from IP version 2.70a onwards. For 64-bit address mode, IP has new registers and different offset for some of the registers which were used in 32-bit address mode. Added driver modifications under the macro CONFIG_MMC_DW_IDMAC_64BIT_ADDRESS to support IDMAC 64-bit address mode. Tested the features in DW_MMC IP core v2.70a with HAPS-51 setup and driver is working fine. Signed-off-by: Prabu Thangamuthu --- drivers/mmc/host/dw_mmc.c | 106 +++++++++++++++++++++++++++++++++++++++++++++ drivers/mmc/host/dw_mmc.h | 11 +++++ 2 files changed, 117 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index ee5f167..de60f61 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -55,7 +55,31 @@ SDMMC_IDMAC_INT_CES | SDMMC_IDMAC_INT_DU | \ SDMMC_IDMAC_INT_FBE | SDMMC_IDMAC_INT_RI | \ SDMMC_IDMAC_INT_TI) +#ifdef CONFIG_MMC_DW_IDMAC_64BIT_ADDRESS +struct idmac_desc64 { + u32 des0; /* Control Descriptor */ +#define IDMAC_DES0_DIC BIT(1) +#define IDMAC_DES0_LD BIT(2) +#define IDMAC_DES0_FD BIT(3) +#define IDMAC_DES0_CH BIT(4) +#define IDMAC_DES0_ER BIT(5) +#define IDMAC_DES0_CES BIT(30) +#define IDMAC_DES0_OWN BIT(31) + + u32 des1; /* Reserved */ + u32 des2; /* Buffer sizes */ +#define IDMAC_SET_BUFFER1_SIZE(d, s) \ + ((d)->des2 = ((d)->des2 & 0x03ffe000) | ((s) & 0x1fff)) + + u32 des3; /* Reserved */ + + u32 des4; /* Lower 32-bits of Buffer Address Pointer 1*/ + u32 des5; /* Upper 32-bits of Buffer Address Pointer 1*/ + u32 des6; /* Lower 32-bits of Next Descriptor Address */ + u32 des7; /* Upper 32-bits of Next Descriptor Address */ +}; +#else struct idmac_desc { u32 des0; /* Control Descriptor */ #define IDMAC_DES0_DIC BIT(1) @@ -74,6 +98,7 @@ struct idmac_desc { u32 des3; /* buffer 2 physical address */ }; +#endif /* CONFIG_MMC_DW_IDMAC_64BIT_ADDRESS */ #endif /* CONFIG_MMC_DW_IDMAC */ /** @@ -365,6 +390,40 @@ static void dw_mci_idmac_complete_dma(struct dw_mci *host) } } +#ifdef CONFIG_MMC_DW_IDMAC_64BIT_ADDRESS +static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, + unsigned int sg_len) +{ + int i; + struct idmac_desc64 *desc = host->sg_cpu; + + for (i = 0; i < sg_len; i++, desc++) { + unsigned int length = sg_dma_len(&data->sg[i]); + u64 mem_addr = sg_dma_address(&data->sg[i]); + + /* Set the OWN bit and disable interrupts for this descriptor */ + desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | IDMAC_DES0_CH; + + /* Buffer length */ + IDMAC_SET_BUFFER1_SIZE(desc, length); + + /* Physical address to DMA to/from */ + desc->des4 = mem_addr & 0xffffffff; + desc->des5 = mem_addr >> 32; + } + + /* Set first descriptor */ + desc = host->sg_cpu; + desc->des0 |= IDMAC_DES0_FD; + + /* Set last descriptor */ + desc = host->sg_cpu + (i - 1) * sizeof(struct idmac_desc64); + desc->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); + desc->des0 |= IDMAC_DES0_LD; + + wmb(); +} +#else static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, unsigned int sg_len) { @@ -396,6 +455,7 @@ static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, wmb(); } +#endif /* CONFIG_MMC_DW_IDMAC_64BIT_ADDRESS */ static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) { @@ -419,6 +479,40 @@ static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) mci_writel(host, PLDMND, 1); } +#ifdef CONFIG_MMC_DW_IDMAC_64BIT_ADDRESS +static int dw_mci_idmac_init(struct dw_mci *host) +{ + struct idmac_desc64 *p; + int i; + + /* Number of descriptors in the ring buffer */ + host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc64); + + /* Forward link the descriptor list */ + for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++) { + p->des6 = (host->sg_dma + (sizeof(struct idmac_desc64) * + (i + 1))) & 0xffffffff; + p->des7 = (host->sg_dma + (sizeof(struct idmac_desc64) * + (i + 1))) >> 32; + } + + /* Set the last descriptor as the end-of-ring descriptor */ + p->des6 = host->sg_dma & 0xffffffff; + p->des7 = host->sg_dma >> 32; + p->des0 = IDMAC_DES0_ER; + + mci_writel(host, BMOD, SDMMC_IDMAC_SWRESET); + + /* Mask out interrupts - get Tx & Rx complete only */ + mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | SDMMC_IDMAC_INT_RI | + SDMMC_IDMAC_INT_TI); + + /* Set the descriptor base address */ + mci_writel(host, DBADDRL, host->sg_dma & 0xffffffff); + mci_writel(host, DBADDRU, host->sg_dma >> 32); + return 0; +} +#else static int dw_mci_idmac_init(struct dw_mci *host) { struct idmac_desc *p; @@ -446,6 +540,7 @@ static int dw_mci_idmac_init(struct dw_mci *host) mci_writel(host, DBADDR, host->sg_dma); return 0; } +#endif /* CONFIG_MMC_DW_IDMAC_64BIT_ADDRESS */ static const struct dw_mci_dma_ops dw_mci_idmac_ops = { .init = dw_mci_idmac_init, @@ -2036,6 +2131,17 @@ static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) static void dw_mci_init_dma(struct dw_mci *host) { + u32 addr_config; + /* Check ADDR_CONFIG bit in HCON to find IDMAC address bus width */ + addr_config = (mci_readl(host, HCON) >> 27) & 0x01; + if (addr_config) { + dev_info(host->dev, "IDMAC with 64-bit address mode.\n"); + if (!dma_set_mask(host->dev, DMA_BIT_MASK(64))) + dma_set_coherent_mask(host->dev, DMA_BIT_MASK(64)); + else + goto no_dma; + } + /* Alloc memory for sg translation */ host->sg_cpu = dmam_alloc_coherent(host->dev, PAGE_SIZE, &host->sg_dma, GFP_KERNEL); diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index 81b2994..a3a5e9c 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -48,11 +48,22 @@ #define SDMMC_UHS_REG 0x074 #define SDMMC_BMOD 0x080 #define SDMMC_PLDMND 0x084 +#ifdef CONFIG_MMC_DW_IDMAC_64BIT_ADDRESS +#define SDMMC_DBADDRL 0x088 +#define SDMMC_DBADDRU 0x08c +#define SDMMC_IDSTS 0x090 +#define SDMMC_IDINTEN 0x094 +#define SDMMC_DSCADDRL 0x098 +#define SDMMC_DSCADDRU 0x09c +#define SDMMC_BUFADDRL 0x0A0 +#define SDMMC_BUFADDRU 0x0A4 +#else #define SDMMC_DBADDR 0x088 #define SDMMC_IDSTS 0x08c #define SDMMC_IDINTEN 0x090 #define SDMMC_DSCADDR 0x094 #define SDMMC_BUFADDR 0x098 +#endif #define SDMMC_DATA(x) (x) /*