diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/spi/Makefile | 4 | ||||
| -rw-r--r-- | drivers/spi/spi-dw-dma.c (renamed from drivers/spi/spi-dw-mid.c) | 66 | ||||
| -rw-r--r-- | drivers/spi/spi-dw-pci.c | 50 | ||||
| -rw-r--r-- | drivers/spi/spi-dw.h | 14 |
5 files changed, 73 insertions, 69 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 099d6a75a371..73d508eb4871 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -226,14 +226,14 @@ config SPI_DESIGNWARE help general driver for SPI controller core from DesignWare +config SPI_DW_DMA + bool "DMA support for DW SPI controller" + depends on SPI_DESIGNWARE && DW_DMAC_PCI + config SPI_DW_PCI tristate "PCI interface driver for DW SPI core" depends on SPI_DESIGNWARE && PCI -config SPI_DW_MID_DMA - bool "DMA support for DW SPI controller on Intel MID platform" - depends on SPI_DW_PCI && DW_DMAC_PCI - config SPI_DW_MMIO tristate "Memory-mapped io interface driver for DW SPI core" depends on SPI_DESIGNWARE diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 840a5a1c655e..d2e41d3d464a 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -37,9 +37,9 @@ obj-$(CONFIG_SPI_DAVINCI) += spi-davinci.o obj-$(CONFIG_SPI_DLN2) += spi-dln2.o obj-$(CONFIG_SPI_DESIGNWARE) += spi-dw.o spi-dw-y := spi-dw-core.o +spi-dw-$(CONFIG_SPI_DW_DMA) += spi-dw-dma.o obj-$(CONFIG_SPI_DW_MMIO) += spi-dw-mmio.o -obj-$(CONFIG_SPI_DW_PCI) += spi-dw-midpci.o -spi-dw-midpci-objs := spi-dw-pci.o spi-dw-mid.o +obj-$(CONFIG_SPI_DW_PCI) += spi-dw-pci.o obj-$(CONFIG_SPI_EFM32) += spi-efm32.o obj-$(CONFIG_SPI_EP93XX) += spi-ep93xx.o obj-$(CONFIG_SPI_FALCON) += spi-falcon.o diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-dma.c index 1cf9e3ffe07b..7ae31682b5de 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-dma.c @@ -1,16 +1,10 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Special handling for DW core on Intel MID platform + * Special handling for DW DMA core * * Copyright (c) 2009, 2014 Intel Corporation. */ -#include <linux/spi/spi.h> -#include <linux/types.h> - -#include "spi-dw.h" - -#ifdef CONFIG_SPI_DW_MID_DMA #include <linux/completion.h> #include <linux/dma-mapping.h> #include <linux/dmaengine.h> @@ -18,6 +12,10 @@ #include <linux/jiffies.h> #include <linux/pci.h> #include <linux/platform_data/dma-dw.h> +#include <linux/spi/spi.h> +#include <linux/types.h> + +#include "spi-dw.h" #define WAIT_RETRIES 5 #define RX_BUSY 0 @@ -461,10 +459,11 @@ static const struct dw_spi_dma_ops mfld_dma_ops = { .dma_stop = mid_spi_dma_stop, }; -static void dw_spi_mid_setup_dma_mfld(struct dw_spi *dws) +void dw_spi_mid_setup_dma_mfld(struct dw_spi *dws) { dws->dma_ops = &mfld_dma_ops; } +EXPORT_SYMBOL_GPL(dw_spi_mid_setup_dma_mfld); static const struct dw_spi_dma_ops generic_dma_ops = { .dma_init = mid_spi_dma_init_generic, @@ -475,55 +474,8 @@ static const struct dw_spi_dma_ops generic_dma_ops = { .dma_stop = mid_spi_dma_stop, }; -static void dw_spi_mid_setup_dma_generic(struct dw_spi *dws) +void dw_spi_mid_setup_dma_generic(struct dw_spi *dws) { dws->dma_ops = &generic_dma_ops; } -#else /* CONFIG_SPI_DW_MID_DMA */ -static inline void dw_spi_mid_setup_dma_mfld(struct dw_spi *dws) {} -static inline void dw_spi_mid_setup_dma_generic(struct dw_spi *dws) {} -#endif - -/* Some specific info for SPI0 controller on Intel MID */ - -/* HW info for MRST Clk Control Unit, 32b reg per controller */ -#define MRST_SPI_CLK_BASE 100000000 /* 100m */ -#define MRST_CLK_SPI_REG 0xff11d86c -#define CLK_SPI_BDIV_OFFSET 0 -#define CLK_SPI_BDIV_MASK 0x00000007 -#define CLK_SPI_CDIV_OFFSET 9 -#define CLK_SPI_CDIV_MASK 0x00000e00 -#define CLK_SPI_DISABLE_OFFSET 8 - -int dw_spi_mid_init_mfld(struct dw_spi *dws) -{ - void __iomem *clk_reg; - u32 clk_cdiv; - - clk_reg = ioremap(MRST_CLK_SPI_REG, 16); - if (!clk_reg) - return -ENOMEM; - - /* Get SPI controller operating freq info */ - clk_cdiv = readl(clk_reg + dws->bus_num * sizeof(u32)); - clk_cdiv &= CLK_SPI_CDIV_MASK; - clk_cdiv >>= CLK_SPI_CDIV_OFFSET; - dws->max_freq = MRST_SPI_CLK_BASE / (clk_cdiv + 1); - - iounmap(clk_reg); - - /* Register hook to configure CTRLR0 */ - dws->update_cr0 = dw_spi_update_cr0; - - dw_spi_mid_setup_dma_mfld(dws); - return 0; -} - -int dw_spi_mid_init_generic(struct dw_spi *dws) -{ - /* Register hook to configure CTRLR0 */ - dws->update_cr0 = dw_spi_update_cr0; - - dw_spi_mid_setup_dma_generic(dws); - return 0; -} +EXPORT_SYMBOL_GPL(dw_spi_mid_setup_dma_generic); diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c index dde54a918b5d..c13707b8493e 100644 --- a/drivers/spi/spi-dw-pci.c +++ b/drivers/spi/spi-dw-pci.c @@ -15,6 +15,15 @@ #define DRIVER_NAME "dw_spi_pci" +/* HW info for MRST Clk Control Unit, 32b reg per controller */ +#define MRST_SPI_CLK_BASE 100000000 /* 100m */ +#define MRST_CLK_SPI_REG 0xff11d86c +#define CLK_SPI_BDIV_OFFSET 0 +#define CLK_SPI_BDIV_MASK 0x00000007 +#define CLK_SPI_CDIV_OFFSET 9 +#define CLK_SPI_CDIV_MASK 0x00000e00 +#define CLK_SPI_DISABLE_OFFSET 8 + struct spi_pci_desc { int (*setup)(struct dw_spi *); u16 num_cs; @@ -22,20 +31,55 @@ struct spi_pci_desc { u32 max_freq; }; +static int spi_mid_init(struct dw_spi *dws) +{ + void __iomem *clk_reg; + u32 clk_cdiv; + + clk_reg = ioremap(MRST_CLK_SPI_REG, 16); + if (!clk_reg) + return -ENOMEM; + + /* Get SPI controller operating freq info */ + clk_cdiv = readl(clk_reg + dws->bus_num * sizeof(u32)); + clk_cdiv &= CLK_SPI_CDIV_MASK; + clk_cdiv >>= CLK_SPI_CDIV_OFFSET; + dws->max_freq = MRST_SPI_CLK_BASE / (clk_cdiv + 1); + + iounmap(clk_reg); + + /* Register hook to configure CTRLR0 */ + dws->update_cr0 = dw_spi_update_cr0; + + dw_spi_mid_setup_dma_mfld(dws); + + return 0; +} + +static int spi_generic_init(struct dw_spi *dws) +{ + /* Register hook to configure CTRLR0 */ + dws->update_cr0 = dw_spi_update_cr0; + + dw_spi_mid_setup_dma_generic(dws); + + return 0; +} + static struct spi_pci_desc spi_pci_mid_desc_1 = { - .setup = dw_spi_mid_init_mfld, + .setup = spi_mid_init, .num_cs = 5, .bus_num = 0, }; static struct spi_pci_desc spi_pci_mid_desc_2 = { - .setup = dw_spi_mid_init_mfld, + .setup = spi_mid_init, .num_cs = 2, .bus_num = 1, }; static struct spi_pci_desc spi_pci_ehl_desc = { - .setup = dw_spi_mid_init_generic, + .setup = spi_generic_init, .num_cs = 2, .bus_num = -1, .max_freq = 100000000, diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 9247670fcdfb..91608cf12636 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -257,8 +257,16 @@ extern u32 dw_spi_update_cr0_v1_01a(struct spi_controller *master, struct spi_device *spi, struct spi_transfer *transfer); -/* platform related setup */ -extern int dw_spi_mid_init_mfld(struct dw_spi *dws); -extern int dw_spi_mid_init_generic(struct dw_spi *dws); +#ifdef CONFIG_SPI_DW_DMA + +extern void dw_spi_mid_setup_dma_mfld(struct dw_spi *dws); +extern void dw_spi_mid_setup_dma_generic(struct dw_spi *dws); + +#else + +static inline void dw_spi_mid_setup_dma_mfld(struct dw_spi *dws) {} +static inline void dw_spi_mid_setup_dma_generic(struct dw_spi *dws) {} + +#endif /* !CONFIG_SPI_DW_DMA */ #endif /* DW_SPI_HEADER_H */ |