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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-25 12:06:33 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-25 12:06:33 -0700 |
commit | ec96e2fe954c23a54bfdf2673437a39e193a1822 (patch) | |
tree | e4041c68ef20a3337c56aefc8db785156307edd1 /arch/arm/mach-s5pv210/dev-spi.c | |
parent | 8e9815a0f8882aaa68645b001bb7538db8886802 (diff) | |
parent | f949c0edd84101bfd30b3e7389c1a12b067e561d (diff) | |
download | kernel_samsung_crespo-ec96e2fe954c23a54bfdf2673437a39e193a1822.zip kernel_samsung_crespo-ec96e2fe954c23a54bfdf2673437a39e193a1822.tar.gz kernel_samsung_crespo-ec96e2fe954c23a54bfdf2673437a39e193a1822.tar.bz2 |
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (103 commits)
ARM: 6141/1: Add audio support part in arch/arm/mach-w90x900
ARM: 5939/1: ARM: Add option CMDLINE_FORCE to force usage of the in-kernel cmdline
ARM: 6140/1: silence a bogus sparse warning in unwind.c
ARM: mach-at91: duplicated include
ARM: arch/arm/nwfpe/fpsr.h: Checkpatch cleanup
ARM: arch/arm/mach-shark/pci.c: Checkpatch cleanup
ARM: arch/arm/nwfpe/ChangeLog: Checkpatch cleanup
ARM: arch/arm/mach-sa1100/leds.c: Checkpatch cleanup
ARM: arch/arm/mach-h720x/common.h: Checkpatch cleanup
ARM: arch/arm/mach-footbridge/ebsa285-pci.c: Checkpatch cleanup
ARM: arch/arm/mach-clps711x/Makefile.boot: Checkpatch cleanup
ARM: arch/arm/boot/bootp/bootp.lds: Checkpatch cleanup
ARM: SPEAR6xx: remove duplicated #include
ARM: s3c6400_defconfig: Add NAND driver
ARM: s3c6400_defconfig: enable sound as modules
ARM: s3c6400_defconfig: enable power management
ARM: s5pv210_defconfig: Update s5pv210_defconfig to v2.6.34
ARM: s5pc110_defconfig: Update s5pc110_defconfig to v2.6.34
ARM: s5p6442_defconfig: Update s5p6442_defconfig to v2.6.34
ARM: s5p6440_defconfig: Update s5p6440_defconfig to v2.6.34
...
Diffstat (limited to 'arch/arm/mach-s5pv210/dev-spi.c')
-rw-r--r-- | arch/arm/mach-s5pv210/dev-spi.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/arch/arm/mach-s5pv210/dev-spi.c b/arch/arm/mach-s5pv210/dev-spi.c new file mode 100644 index 0000000..337a62b --- /dev/null +++ b/arch/arm/mach-s5pv210/dev-spi.c @@ -0,0 +1,178 @@ +/* linux/arch/arm/mach-s5pv210/dev-spi.c + * + * Copyright (C) 2010 Samsung Electronics Co. Ltd. + * Jaswinder Singh <jassi.brar@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> + +#include <mach/dma.h> +#include <mach/map.h> +#include <mach/irqs.h> +#include <mach/gpio.h> +#include <mach/spi-clocks.h> + +#include <plat/s3c64xx-spi.h> +#include <plat/gpio-cfg.h> + +static char *spi_src_clks[] = { + [S5PV210_SPI_SRCCLK_PCLK] = "pclk", + [S5PV210_SPI_SRCCLK_SCLK] = "sclk_spi", +}; + +/* SPI Controller platform_devices */ + +/* Since we emulate multi-cs capability, we do not touch the CS. + * The emulated CS is toggled by board specific mechanism, as it can + * be either some immediate GPIO or some signal out of some other + * chip in between ... or some yet another way. + * We simply do not assume anything about CS. + */ +static int s5pv210_spi_cfg_gpio(struct platform_device *pdev) +{ + switch (pdev->id) { + case 0: + s3c_gpio_cfgpin(S5PV210_GPB(0), S3C_GPIO_SFN(2)); + s3c_gpio_cfgpin(S5PV210_GPB(1), S3C_GPIO_SFN(2)); + s3c_gpio_cfgpin(S5PV210_GPB(2), S3C_GPIO_SFN(2)); + s3c_gpio_setpull(S5PV210_GPB(0), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PV210_GPB(1), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PV210_GPB(2), S3C_GPIO_PULL_UP); + break; + + case 1: + s3c_gpio_cfgpin(S5PV210_GPB(4), S3C_GPIO_SFN(2)); + s3c_gpio_cfgpin(S5PV210_GPB(5), S3C_GPIO_SFN(2)); + s3c_gpio_cfgpin(S5PV210_GPB(6), S3C_GPIO_SFN(2)); + s3c_gpio_setpull(S5PV210_GPB(4), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PV210_GPB(5), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PV210_GPB(6), S3C_GPIO_PULL_UP); + break; + + default: + dev_err(&pdev->dev, "Invalid SPI Controller number!"); + return -EINVAL; + } + + return 0; +} + +static struct resource s5pv210_spi0_resource[] = { + [0] = { + .start = S5PV210_PA_SPI0, + .end = S5PV210_PA_SPI0 + 0x100 - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = DMACH_SPI0_TX, + .end = DMACH_SPI0_TX, + .flags = IORESOURCE_DMA, + }, + [2] = { + .start = DMACH_SPI0_RX, + .end = DMACH_SPI0_RX, + .flags = IORESOURCE_DMA, + }, + [3] = { + .start = IRQ_SPI0, + .end = IRQ_SPI0, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct s3c64xx_spi_info s5pv210_spi0_pdata = { + .cfg_gpio = s5pv210_spi_cfg_gpio, + .fifo_lvl_mask = 0x1ff, + .rx_lvl_offset = 15, + .high_speed = 1, +}; + +static u64 spi_dmamask = DMA_BIT_MASK(32); + +struct platform_device s5pv210_device_spi0 = { + .name = "s3c64xx-spi", + .id = 0, + .num_resources = ARRAY_SIZE(s5pv210_spi0_resource), + .resource = s5pv210_spi0_resource, + .dev = { + .dma_mask = &spi_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s5pv210_spi0_pdata, + }, +}; + +static struct resource s5pv210_spi1_resource[] = { + [0] = { + .start = S5PV210_PA_SPI1, + .end = S5PV210_PA_SPI1 + 0x100 - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = DMACH_SPI1_TX, + .end = DMACH_SPI1_TX, + .flags = IORESOURCE_DMA, + }, + [2] = { + .start = DMACH_SPI1_RX, + .end = DMACH_SPI1_RX, + .flags = IORESOURCE_DMA, + }, + [3] = { + .start = IRQ_SPI1, + .end = IRQ_SPI1, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct s3c64xx_spi_info s5pv210_spi1_pdata = { + .cfg_gpio = s5pv210_spi_cfg_gpio, + .fifo_lvl_mask = 0x7f, + .rx_lvl_offset = 15, + .high_speed = 1, +}; + +struct platform_device s5pv210_device_spi1 = { + .name = "s3c64xx-spi", + .id = 1, + .num_resources = ARRAY_SIZE(s5pv210_spi1_resource), + .resource = s5pv210_spi1_resource, + .dev = { + .dma_mask = &spi_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s5pv210_spi1_pdata, + }, +}; + +void __init s5pv210_spi_set_info(int cntrlr, int src_clk_nr, int num_cs) +{ + struct s3c64xx_spi_info *pd; + + /* Reject invalid configuration */ + if (!num_cs || src_clk_nr < 0 + || src_clk_nr > S5PV210_SPI_SRCCLK_SCLK) { + printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__); + return; + } + + switch (cntrlr) { + case 0: + pd = &s5pv210_spi0_pdata; + break; + case 1: + pd = &s5pv210_spi1_pdata; + break; + default: + printk(KERN_ERR "%s: Invalid SPI controller(%d)\n", + __func__, cntrlr); + return; + } + + pd->num_cs = num_cs; + pd->src_clk_nr = src_clk_nr; + pd->src_clk_name = spi_src_clks[src_clk_nr]; +} |