diff options
| -rw-r--r-- | arch/arm/mach-s3c6400/include/mach/map.h | 2 | ||||
| -rw-r--r-- | arch/arm/plat-s3c/include/plat/devs.h | 3 | ||||
| -rw-r--r-- | arch/arm/plat-s3c64xx/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/plat-s3c64xx/clock.c | 12 | ||||
| -rw-r--r-- | arch/arm/plat-s3c64xx/dev-spi.c | 180 | ||||
| -rw-r--r-- | arch/arm/plat-s3c64xx/include/plat/spi-clocks.h | 18 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/s3c64xx-spi.h | 67 |
7 files changed, 283 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c6400/include/mach/map.h b/arch/arm/mach-s3c6400/include/mach/map.h index 3e17adf3a89..801c1c0f3a9 100644 --- a/arch/arm/mach-s3c6400/include/mach/map.h +++ b/arch/arm/mach-s3c6400/include/mach/map.h @@ -64,6 +64,8 @@ #define S3C64XX_PA_IIS1 (0x7F003000) #define S3C64XX_PA_TIMER (0x7F006000) #define S3C64XX_PA_IIC0 (0x7F004000) +#define S3C64XX_PA_SPI0 (0x7F00B000) +#define S3C64XX_PA_SPI1 (0x7F00C000) #define S3C64XX_PA_PCM0 (0x7F009000) #define S3C64XX_PA_PCM1 (0x7F00A000) #define S3C64XX_PA_IISV4 (0x7F00D000) diff --git a/arch/arm/plat-s3c/include/plat/devs.h b/arch/arm/plat-s3c/include/plat/devs.h index 8a4153b49f4..f4a7e57bab2 100644 --- a/arch/arm/plat-s3c/include/plat/devs.h +++ b/arch/arm/plat-s3c/include/plat/devs.h @@ -29,6 +29,9 @@ extern struct platform_device s3c64xx_device_iis0; extern struct platform_device s3c64xx_device_iis1; extern struct platform_device s3c64xx_device_iisv4; +extern struct platform_device s3c64xx_device_spi0; +extern struct platform_device s3c64xx_device_spi1; + extern struct platform_device s3c64xx_device_pcm0; extern struct platform_device s3c64xx_device_pcm1; diff --git a/arch/arm/plat-s3c64xx/Makefile b/arch/arm/plat-s3c64xx/Makefile index b241f369556..80255a5e178 100644 --- a/arch/arm/plat-s3c64xx/Makefile +++ b/arch/arm/plat-s3c64xx/Makefile @@ -47,3 +47,4 @@ obj-$(CONFIG_S3C64XX_SETUP_I2C1) += setup-i2c1.o obj-$(CONFIG_S3C64XX_SETUP_FB_24BPP) += setup-fb-24bpp.o obj-$(CONFIG_S3C64XX_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o obj-$(CONFIG_SND_S3C24XX_SOC) += dev-audio.o +obj-$(CONFIG_SPI_S3C64XX) += dev-spi.o diff --git a/arch/arm/plat-s3c64xx/clock.c b/arch/arm/plat-s3c64xx/clock.c index ae5883c00e7..2989c3a2e94 100644 --- a/arch/arm/plat-s3c64xx/clock.c +++ b/arch/arm/plat-s3c64xx/clock.c @@ -141,6 +141,18 @@ static struct clk init_clocks_disable[] = { .enable = s3c64xx_pclk_ctrl, .ctrlbit = S3C_CLKCON_PCLK_SPI1, }, { + .name = "spi_48m", + .id = 0, + .parent = &clk_48m, + .enable = s3c64xx_sclk_ctrl, + .ctrlbit = S3C_CLKCON_SCLK_SPI0_48, + }, { + .name = "spi_48m", + .id = 1, + .parent = &clk_48m, + .enable = s3c64xx_sclk_ctrl, + .ctrlbit = S3C_CLKCON_SCLK_SPI1_48, + }, { .name = "48m", .id = 0, .parent = &clk_48m, diff --git a/arch/arm/plat-s3c64xx/dev-spi.c b/arch/arm/plat-s3c64xx/dev-spi.c new file mode 100644 index 00000000000..6b6d7af0662 --- /dev/null +++ b/arch/arm/plat-s3c64xx/dev-spi.c @@ -0,0 +1,180 @@ +/* linux/arch/arm/plat-s3c64xx/dev-spi.c + * + * Copyright (C) 2009 Samsung Electronics 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/kernel.h> +#include <linux/string.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> + +#include <mach/dma.h> +#include <mach/map.h> +#include <mach/gpio.h> + +#include <plat/spi-clocks.h> +#include <plat/s3c64xx-spi.h> +#include <plat/gpio-bank-c.h> +#include <plat/gpio-cfg.h> +#include <plat/irqs.h> + +static char *spi_src_clks[] = { + [S3C64XX_SPI_SRCCLK_PCLK] = "pclk", + [S3C64XX_SPI_SRCCLK_SPIBUS] = "spi-bus", + [S3C64XX_SPI_SRCCLK_48M] = "spi_48m", +}; + +/* SPI Controller platform_devices */ + +/* Since we emulate multi-cs capability, we do not touch the GPC-3,7. + * 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 s3c64xx_spi_cfg_gpio(struct platform_device *pdev) +{ + switch (pdev->id) { + case 0: + s3c_gpio_cfgpin(S3C64XX_GPC(0), S3C64XX_GPC0_SPI_MISO0); + s3c_gpio_cfgpin(S3C64XX_GPC(1), S3C64XX_GPC1_SPI_CLKO); + s3c_gpio_cfgpin(S3C64XX_GPC(2), S3C64XX_GPC2_SPI_MOSIO); + s3c_gpio_setpull(S3C64XX_GPC(0), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S3C64XX_GPC(1), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S3C64XX_GPC(2), S3C_GPIO_PULL_UP); + break; + + case 1: + s3c_gpio_cfgpin(S3C64XX_GPC(4), S3C64XX_GPC4_SPI_MISO1); + s3c_gpio_cfgpin(S3C64XX_GPC(5), S3C64XX_GPC5_SPI_CLK1); + s3c_gpio_cfgpin(S3C64XX_GPC(6), S3C64XX_GPC6_SPI_MOSI1); + s3c_gpio_setpull(S3C64XX_GPC(4), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S3C64XX_GPC(5), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S3C64XX_GPC(6), S3C_GPIO_PULL_UP); + break; + + default: + dev_err(&pdev->dev, "Invalid SPI Controller number!"); + return -EINVAL; + } + + return 0; +} + +static struct resource s3c64xx_spi0_resource[] = { + [0] = { + .start = S3C64XX_PA_SPI0, + .end = S3C64XX_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 s3c64xx_spi0_pdata = { + .cfg_gpio = s3c64xx_spi_cfg_gpio, + .fifo_lvl_mask = 0x7f, + .rx_lvl_offset = 13, +}; + +static u64 spi_dmamask = DMA_BIT_MASK(32); + +struct platform_device s3c64xx_device_spi0 = { + .name = "s3c64xx-spi", + .id = 0, + .num_resources = ARRAY_SIZE(s3c64xx_spi0_resource), + .resource = s3c64xx_spi0_resource, + .dev = { + .dma_mask = &spi_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s3c64xx_spi0_pdata, + }, +}; +EXPORT_SYMBOL(s3c64xx_device_spi0); + +static struct resource s3c64xx_spi1_resource[] = { + [0] = { + .start = S3C64XX_PA_SPI1, + .end = S3C64XX_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 s3c64xx_spi1_pdata = { + .cfg_gpio = s3c64xx_spi_cfg_gpio, + .fifo_lvl_mask = 0x7f, + .rx_lvl_offset = 13, +}; + +struct platform_device s3c64xx_device_spi1 = { + .name = "s3c64xx-spi", + .id = 1, + .num_resources = ARRAY_SIZE(s3c64xx_spi1_resource), + .resource = s3c64xx_spi1_resource, + .dev = { + .dma_mask = &spi_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s3c64xx_spi1_pdata, + }, +}; +EXPORT_SYMBOL(s3c64xx_device_spi1); + +void __init s3c64xx_spi_set_info(int cntrlr, int src_clk_nr, int num_cs) +{ + /* Reject invalid configuration */ + if (!num_cs || src_clk_nr < 0 + || src_clk_nr > S3C64XX_SPI_SRCCLK_48M) { + printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__); + return; + } + + switch (cntrlr) { + case 0: + s3c64xx_spi0_pdata.num_cs = num_cs; + s3c64xx_spi0_pdata.src_clk_nr = src_clk_nr; + s3c64xx_spi0_pdata.src_clk_name = spi_src_clks[src_clk_nr]; + break; + case 1: + s3c64xx_spi1_pdata.num_cs = num_cs; + s3c64xx_spi1_pdata.src_clk_nr = src_clk_nr; + s3c64xx_spi1_pdata.src_clk_name = spi_src_clks[src_clk_nr]; + break; + default: + printk(KERN_ERR "%s: Invalid SPI controller(%d)\n", + __func__, cntrlr); + return; + } +} diff --git a/arch/arm/plat-s3c64xx/include/plat/spi-clocks.h b/arch/arm/plat-s3c64xx/include/plat/spi-clocks.h new file mode 100644 index 00000000000..524bdae3f62 --- /dev/null +++ b/arch/arm/plat-s3c64xx/include/plat/spi-clocks.h @@ -0,0 +1,18 @@ +/* linux/arch/arm/plat-s3c64xx/include/plat/spi-clocks.h + * + * Copyright (C) 2009 Samsung Electronics 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. + */ + +#ifndef __S3C64XX_PLAT_SPI_CLKS_H +#define __S3C64XX_PLAT_SPI_CLKS_H __FILE__ + +#define S3C64XX_SPI_SRCCLK_PCLK 0 +#define S3C64XX_SPI_SRCCLK_SPIBUS 1 +#define S3C64XX_SPI_SRCCLK_48M 2 + +#endif /* __S3C64XX_PLAT_SPI_CLKS_H */ diff --git a/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h b/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h new file mode 100644 index 00000000000..d1772414931 --- /dev/null +++ b/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h @@ -0,0 +1,67 @@ +/* linux/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h + * + * Copyright (C) 2009 Samsung Electronics 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. + */ + +#ifndef __S3C64XX_PLAT_SPI_H +#define __S3C64XX_PLAT_SPI_H + +/** + * struct s3c64xx_spi_csinfo - ChipSelect description + * @fb_delay: Slave specific feedback delay. + * Refer to FB_CLK_SEL register definition in SPI chapter. + * @line: Custom 'identity' of the CS line. + * @set_level: CS line control. + * + * This is per SPI-Slave Chipselect information. + * Allocate and initialize one in machine init code and make the + * spi_board_info.controller_data point to it. + */ +struct s3c64xx_spi_csinfo { + u8 fb_delay; + unsigned line; + void (*set_level)(unsigned line_id, int lvl); +}; + +/** + * struct s3c64xx_spi_info - SPI Controller defining structure + * @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field. + * @src_clk_name: Platform name of the corresponding clock. + * @num_cs: Number of CS this controller emulates. + * @cfg_gpio: Configure pins for this SPI controller. + * @fifo_lvl_mask: All tx fifo_lvl fields start at offset-6 + * @rx_lvl_offset: Depends on tx fifo_lvl field and bus number + * @high_speed: If the controller supports HIGH_SPEED_EN bit + */ +struct s3c64xx_spi_info { + int src_clk_nr; + char *src_clk_name; + + int num_cs; + + int (*cfg_gpio)(struct platform_device *pdev); + + /* Following two fields are for future compatibility */ + int fifo_lvl_mask; + int rx_lvl_offset; + int high_speed; +}; + +/** + * s3c64xx_spi_set_info - SPI Controller configure callback by the board + * initialization code. + * @cntrlr: SPI controller number the configuration is for. + * @src_clk_nr: Clock the SPI controller is to use to generate SPI clocks. + * @num_cs: Number of elements in the 'cs' array. + * + * Call this from machine init code for each SPI Controller that + * has some chips attached to it. + */ +extern void s3c64xx_spi_set_info(int cntrlr, int src_clk_nr, int num_cs); + +#endif /* __S3C64XX_PLAT_SPI_H */ |