diff options
| -rw-r--r-- | drivers/mmc/host/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/mmc/host/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mmc/host/mmci.c | 18 | ||||
| -rw-r--r-- | drivers/mmc/host/mmci_qcom_dml.c | 177 | ||||
| -rw-r--r-- | drivers/mmc/host/mmci_qcom_dml.h | 31 |
5 files changed, 237 insertions, 1 deletions
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 451135822464..58aedcc900d1 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -14,6 +14,17 @@ config MMC_ARMMMCI If unsure, say N. +config MMC_QCOM_DML + tristate "Qualcomm Data Mover for SD Card Controller" + depends on MMC_ARMMMCI && QCOM_BAM_DMA + default y + help + This selects the Qualcomm Data Mover lite/local on SD Card controller. + This option will enable the dma to work correctly, if you are using + Qcom SOCs and MMC, you would probably need this option to get DMA working. + + if unsure, say N. + config MMC_PXA tristate "Intel PXA25x/26x/27x Multimedia Card Interface support" depends on ARCH_PXA diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index f211eede8db5..2d223463e6c5 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -3,6 +3,7 @@ # obj-$(CONFIG_MMC_ARMMMCI) += mmci.o +obj-$(CONFIG_MMC_QCOM_DML) += mmci_qcom_dml.o obj-$(CONFIG_MMC_PXA) += pxamci.o obj-$(CONFIG_MMC_MXC) += mxcmmc.o obj-$(CONFIG_MMC_MXS) += mxs-mmc.o diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index e4d470704150..a7b3af9e9a2a 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -43,6 +43,7 @@ #include <asm/sizes.h> #include "mmci.h" +#include "mmci_qcom_dml.h" #define DRIVER_NAME "mmci-pl18x" @@ -74,6 +75,7 @@ static unsigned int fmax = 515633; * @pwrreg_nopower: bits in MMCIPOWER don't controls ext. power supply * @explicit_mclk_control: enable explicit mclk control in driver. * @qcom_fifo: enables qcom specific fifo pio read logic. + * @qcom_dml: enables qcom specific dma glue for dma transfers. * @reversed_irq_handling: handle data irq before cmd irq. */ struct variant_data { @@ -98,6 +100,7 @@ struct variant_data { bool pwrreg_nopower; bool explicit_mclk_control; bool qcom_fifo; + bool qcom_dml; bool reversed_irq_handling; }; @@ -208,6 +211,7 @@ static struct variant_data variant_qcom = { .f_max = 208000000, .explicit_mclk_control = true, .qcom_fifo = true, + .qcom_dml = true, }; static int mmci_card_busy(struct mmc_host *mmc) @@ -421,6 +425,7 @@ static void mmci_dma_setup(struct mmci_host *host) { const char *rxname, *txname; dma_cap_mask_t mask; + struct variant_data *variant = host->variant; host->dma_rx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "rx"); host->dma_tx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "tx"); @@ -471,6 +476,10 @@ static void mmci_dma_setup(struct mmci_host *host) if (max_seg_size < host->mmc->max_seg_size) host->mmc->max_seg_size = max_seg_size; } + + if (variant->qcom_dml && host->dma_rx_channel && host->dma_tx_channel) + if (dml_hw_init(host, host->mmc->parent->of_node)) + variant->qcom_dml = false; } /* @@ -572,6 +581,7 @@ static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data, struct dma_async_tx_descriptor *desc; enum dma_data_direction buffer_dirn; int nr_sg; + unsigned long flags = DMA_CTRL_ACK; if (data->flags & MMC_DATA_READ) { conf.direction = DMA_DEV_TO_MEM; @@ -596,9 +606,12 @@ static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data, if (nr_sg == 0) return -EINVAL; + if (host->variant->qcom_dml) + flags |= DMA_PREP_INTERRUPT; + dmaengine_slave_config(chan, &conf); desc = dmaengine_prep_slave_sg(chan, data->sg, nr_sg, - conf.direction, DMA_CTRL_ACK); + conf.direction, flags); if (!desc) goto unmap_exit; @@ -647,6 +660,9 @@ static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl) dmaengine_submit(host->dma_desc_current); dma_async_issue_pending(host->dma_current); + if (host->variant->qcom_dml) + dml_start_xfer(host, data); + datactrl |= MCI_DPSM_DMAENABLE; /* Trigger the DMA transfer */ diff --git a/drivers/mmc/host/mmci_qcom_dml.c b/drivers/mmc/host/mmci_qcom_dml.c new file mode 100644 index 000000000000..2b7fc3764803 --- /dev/null +++ b/drivers/mmc/host/mmci_qcom_dml.c @@ -0,0 +1,177 @@ +/* + * + * Copyright (c) 2011, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ +#include <linux/of.h> +#include <linux/of_dma.h> +#include <linux/bitops.h> +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include "mmci.h" + +/* Registers */ +#define DML_CONFIG 0x00 +#define PRODUCER_CRCI_MSK GENMASK(1, 0) +#define PRODUCER_CRCI_DISABLE 0 +#define PRODUCER_CRCI_X_SEL BIT(0) +#define PRODUCER_CRCI_Y_SEL BIT(1) +#define CONSUMER_CRCI_MSK GENMASK(3, 2) +#define CONSUMER_CRCI_DISABLE 0 +#define CONSUMER_CRCI_X_SEL BIT(2) +#define CONSUMER_CRCI_Y_SEL BIT(3) +#define PRODUCER_TRANS_END_EN BIT(4) +#define BYPASS BIT(16) +#define DIRECT_MODE BIT(17) +#define INFINITE_CONS_TRANS BIT(18) + +#define DML_SW_RESET 0x08 +#define DML_PRODUCER_START 0x0c +#define DML_CONSUMER_START 0x10 +#define DML_PRODUCER_PIPE_LOGICAL_SIZE 0x14 +#define DML_CONSUMER_PIPE_LOGICAL_SIZE 0x18 +#define DML_PIPE_ID 0x1c +#define PRODUCER_PIPE_ID_SHFT 0 +#define PRODUCER_PIPE_ID_MSK GENMASK(4, 0) +#define CONSUMER_PIPE_ID_SHFT 16 +#define CONSUMER_PIPE_ID_MSK GENMASK(20, 16) + +#define DML_PRODUCER_BAM_BLOCK_SIZE 0x24 +#define DML_PRODUCER_BAM_TRANS_SIZE 0x28 + +/* other definitions */ +#define PRODUCER_PIPE_LOGICAL_SIZE 4096 +#define CONSUMER_PIPE_LOGICAL_SIZE 4096 + +#define DML_OFFSET 0x800 + +void dml_start_xfer(struct mmci_host *host, struct mmc_data *data) +{ + u32 config; + void __iomem *base = host->base + DML_OFFSET; + + if (data->flags & MMC_DATA_READ) { + /* Read operation: configure DML for producer operation */ + /* Set producer CRCI-x and disable consumer CRCI */ + config = readl_relaxed(base + DML_CONFIG); + config = (config & ~PRODUCER_CRCI_MSK) | PRODUCER_CRCI_X_SEL; + config = (config & ~CONSUMER_CRCI_MSK) | CONSUMER_CRCI_DISABLE; + writel_relaxed(config, base + DML_CONFIG); + + /* Set the Producer BAM block size */ + writel_relaxed(data->blksz, base + DML_PRODUCER_BAM_BLOCK_SIZE); + + /* Set Producer BAM Transaction size */ + writel_relaxed(data->blocks * data->blksz, + base + DML_PRODUCER_BAM_TRANS_SIZE); + /* Set Producer Transaction End bit */ + config = readl_relaxed(base + DML_CONFIG); + config |= PRODUCER_TRANS_END_EN; + writel_relaxed(config, base + DML_CONFIG); + /* Trigger producer */ + writel_relaxed(1, base + DML_PRODUCER_START); + } else { + /* Write operation: configure DML for consumer operation */ + /* Set consumer CRCI-x and disable producer CRCI*/ + config = readl_relaxed(base + DML_CONFIG); + config = (config & ~CONSUMER_CRCI_MSK) | CONSUMER_CRCI_X_SEL; + config = (config & ~PRODUCER_CRCI_MSK) | PRODUCER_CRCI_DISABLE; + writel_relaxed(config, base + DML_CONFIG); + /* Clear Producer Transaction End bit */ + config = readl_relaxed(base + DML_CONFIG); + config &= ~PRODUCER_TRANS_END_EN; + writel_relaxed(config, base + DML_CONFIG); + /* Trigger consumer */ + writel_relaxed(1, base + DML_CONSUMER_START); + } + + /* make sure the dml is configured before dma is triggered */ + wmb(); +} + +static int of_get_dml_pipe_index(struct device_node *np, const char *name) +{ + int index; + struct of_phandle_args dma_spec; + + index = of_property_match_string(np, "dma-names", name); + + if (index < 0) + return -ENODEV; + + if (of_parse_phandle_with_args(np, "dmas", "#dma-cells", index, + &dma_spec)) + return -ENODEV; + + if (dma_spec.args_count) + return dma_spec.args[0]; + + return -ENODEV; +} + +/* Initialize the dml hardware connected to SD Card controller */ +int dml_hw_init(struct mmci_host *host, struct device_node *np) +{ + u32 config; + void __iomem *base; + int consumer_id, producer_id; + + consumer_id = of_get_dml_pipe_index(np, "tx"); + producer_id = of_get_dml_pipe_index(np, "rx"); + + if (producer_id < 0 || consumer_id < 0) + return -ENODEV; + + base = host->base + DML_OFFSET; + + /* Reset the DML block */ + writel_relaxed(1, base + DML_SW_RESET); + + /* Disable the producer and consumer CRCI */ + config = (PRODUCER_CRCI_DISABLE | CONSUMER_CRCI_DISABLE); + /* + * Disable the bypass mode. Bypass mode will only be used + * if data transfer is to happen in PIO mode and don't + * want the BAM interface to connect with SDCC-DML. + */ + config &= ~BYPASS; + /* + * Disable direct mode as we don't DML to MASTER the AHB bus. + * BAM connected with DML should MASTER the AHB bus. + */ + config &= ~DIRECT_MODE; + /* + * Disable infinite mode transfer as we won't be doing any + * infinite size data transfers. All data transfer will be + * of finite data size. + */ + config &= ~INFINITE_CONS_TRANS; + writel_relaxed(config, base + DML_CONFIG); + + /* + * Initialize the logical BAM pipe size for producer + * and consumer. + */ + writel_relaxed(PRODUCER_PIPE_LOGICAL_SIZE, + base + DML_PRODUCER_PIPE_LOGICAL_SIZE); + writel_relaxed(CONSUMER_PIPE_LOGICAL_SIZE, + base + DML_CONSUMER_PIPE_LOGICAL_SIZE); + + /* Initialize Producer/consumer pipe id */ + writel_relaxed(producer_id | (consumer_id << CONSUMER_PIPE_ID_SHFT), + base + DML_PIPE_ID); + + /* Make sure dml intialization is finished */ + mb(); + + return 0; +} diff --git a/drivers/mmc/host/mmci_qcom_dml.h b/drivers/mmc/host/mmci_qcom_dml.h new file mode 100644 index 000000000000..6e405d09d534 --- /dev/null +++ b/drivers/mmc/host/mmci_qcom_dml.h @@ -0,0 +1,31 @@ +/* + * + * Copyright (c) 2011, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ +#ifndef __MMC_QCOM_DML_H__ +#define __MMC_QCOM_DML_H__ + +#ifdef CONFIG_MMC_QCOM_DML +int dml_hw_init(struct mmci_host *host, struct device_node *np); +void dml_start_xfer(struct mmci_host *host, struct mmc_data *data); +#else +static inline int dml_hw_init(struct mmci_host *host, struct device_node *np) +{ + return -ENOSYS; +} +static inline void dml_start_xfer(struct mmci_host *host, struct mmc_data *data) +{ +} +#endif /* CONFIG_MMC_QCOM_DML */ + +#endif /* __MMC_QCOM_DML_H__ */ |