mirror of https://gitee.com/openkylin/linux.git
at91/atmel-mci: inclusion of sd/mmc driver in at91sam9g45 chip and board
This adds the support of atmel-mci sd/mmc driver in at91sam9g45 devices and board files. This also configures the DMA controller slave interface for at_hdmac dmaengine driver. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Nicolas Ferre
parent
a2a571b74a
commit
75305d768d
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@ -15,6 +15,7 @@
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include <linux/i2c-gpio.h>
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#include <linux/atmel-mci.h>
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#include <linux/fb.h>
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#include <video/atmel_lcdc.h>
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@ -25,6 +26,7 @@
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#include <mach/at91sam9g45_matrix.h>
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#include <mach/at91sam9_smc.h>
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#include <mach/at_hdmac.h>
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#include <mach/atmel-mci.h>
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#include "generic.h"
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@ -349,6 +351,169 @@ void __init at91_add_device_eth(struct at91_eth_data *data) {}
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#endif
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/* --------------------------------------------------------------------
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* MMC / SD
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* -------------------------------------------------------------------- */
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#if defined(CONFIG_MMC_ATMELMCI) || defined(CONFIG_MMC_ATMELMCI_MODULE)
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static u64 mmc_dmamask = DMA_BIT_MASK(32);
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static struct mci_platform_data mmc0_data, mmc1_data;
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static struct resource mmc0_resources[] = {
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[0] = {
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.start = AT91SAM9G45_BASE_MCI0,
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.end = AT91SAM9G45_BASE_MCI0 + SZ_16K - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = AT91SAM9G45_ID_MCI0,
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.end = AT91SAM9G45_ID_MCI0,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device at91sam9g45_mmc0_device = {
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.name = "atmel_mci",
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.id = 0,
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.dev = {
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.dma_mask = &mmc_dmamask,
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.coherent_dma_mask = DMA_BIT_MASK(32),
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.platform_data = &mmc0_data,
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},
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.resource = mmc0_resources,
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.num_resources = ARRAY_SIZE(mmc0_resources),
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};
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static struct resource mmc1_resources[] = {
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[0] = {
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.start = AT91SAM9G45_BASE_MCI1,
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.end = AT91SAM9G45_BASE_MCI1 + SZ_16K - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = AT91SAM9G45_ID_MCI1,
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.end = AT91SAM9G45_ID_MCI1,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device at91sam9g45_mmc1_device = {
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.name = "atmel_mci",
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.id = 1,
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.dev = {
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.dma_mask = &mmc_dmamask,
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.coherent_dma_mask = DMA_BIT_MASK(32),
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.platform_data = &mmc1_data,
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},
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.resource = mmc1_resources,
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.num_resources = ARRAY_SIZE(mmc1_resources),
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};
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/* Consider only one slot : slot 0 */
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void __init at91_add_device_mci(short mmc_id, struct mci_platform_data *data)
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{
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if (!data)
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return;
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/* Must have at least one usable slot */
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if (!data->slot[0].bus_width)
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return;
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#if defined(CONFIG_AT_HDMAC) || defined(CONFIG_AT_HDMAC_MODULE)
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{
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struct at_dma_slave *atslave;
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struct mci_dma_data *alt_atslave;
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alt_atslave = kzalloc(sizeof(struct mci_dma_data), GFP_KERNEL);
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atslave = &alt_atslave->sdata;
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/* DMA slave channel configuration */
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atslave->dma_dev = &at_hdmac_device.dev;
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atslave->reg_width = AT_DMA_SLAVE_WIDTH_32BIT;
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atslave->cfg = ATC_FIFOCFG_HALFFIFO
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| ATC_SRC_H2SEL_HW | ATC_DST_H2SEL_HW;
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atslave->ctrla = ATC_SCSIZE_16 | ATC_DCSIZE_16;
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if (mmc_id == 0) /* MCI0 */
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atslave->cfg |= ATC_SRC_PER(AT_DMA_ID_MCI0)
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| ATC_DST_PER(AT_DMA_ID_MCI0);
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else /* MCI1 */
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atslave->cfg |= ATC_SRC_PER(AT_DMA_ID_MCI1)
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| ATC_DST_PER(AT_DMA_ID_MCI1);
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data->dma_slave = alt_atslave;
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}
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#endif
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/* input/irq */
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if (data->slot[0].detect_pin) {
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at91_set_gpio_input(data->slot[0].detect_pin, 1);
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at91_set_deglitch(data->slot[0].detect_pin, 1);
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}
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if (data->slot[0].wp_pin)
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at91_set_gpio_input(data->slot[0].wp_pin, 1);
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if (mmc_id == 0) { /* MCI0 */
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/* CLK */
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at91_set_A_periph(AT91_PIN_PA0, 0);
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/* CMD */
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at91_set_A_periph(AT91_PIN_PA1, 1);
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/* DAT0, maybe DAT1..DAT3 and maybe DAT4..DAT7 */
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at91_set_A_periph(AT91_PIN_PA2, 1);
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if (data->slot[0].bus_width == 4) {
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at91_set_A_periph(AT91_PIN_PA3, 1);
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at91_set_A_periph(AT91_PIN_PA4, 1);
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at91_set_A_periph(AT91_PIN_PA5, 1);
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if (data->slot[0].bus_width == 8) {
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at91_set_A_periph(AT91_PIN_PA6, 1);
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at91_set_A_periph(AT91_PIN_PA7, 1);
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at91_set_A_periph(AT91_PIN_PA8, 1);
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at91_set_A_periph(AT91_PIN_PA9, 1);
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}
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}
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mmc0_data = *data;
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at91_clock_associate("mci0_clk", &at91sam9g45_mmc0_device.dev, "mci_clk");
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platform_device_register(&at91sam9g45_mmc0_device);
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} else { /* MCI1 */
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/* CLK */
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at91_set_A_periph(AT91_PIN_PA31, 0);
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/* CMD */
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at91_set_A_periph(AT91_PIN_PA22, 1);
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/* DAT0, maybe DAT1..DAT3 and maybe DAT4..DAT7 */
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at91_set_A_periph(AT91_PIN_PA23, 1);
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if (data->slot[0].bus_width == 4) {
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at91_set_A_periph(AT91_PIN_PA24, 1);
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at91_set_A_periph(AT91_PIN_PA25, 1);
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at91_set_A_periph(AT91_PIN_PA26, 1);
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if (data->slot[0].bus_width == 8) {
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at91_set_A_periph(AT91_PIN_PA27, 1);
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at91_set_A_periph(AT91_PIN_PA28, 1);
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at91_set_A_periph(AT91_PIN_PA29, 1);
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at91_set_A_periph(AT91_PIN_PA30, 1);
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}
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}
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mmc1_data = *data;
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at91_clock_associate("mci1_clk", &at91sam9g45_mmc1_device.dev, "mci_clk");
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platform_device_register(&at91sam9g45_mmc1_device);
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}
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}
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#else
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void __init at91_add_device_mci(short mmc_id, struct mci_platform_data *data) {}
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#endif
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/* --------------------------------------------------------------------
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* NAND / SmartMedia
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* -------------------------------------------------------------------- */
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@ -24,7 +24,9 @@
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#include <linux/input.h>
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#include <linux/leds.h>
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#include <linux/clk.h>
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#include <linux/atmel-mci.h>
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#include <mach/hardware.h>
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#include <video/atmel_lcdc.h>
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#include <asm/setup.h>
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@ -97,6 +99,25 @@ static struct spi_board_info ek_spi_devices[] = {
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};
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/*
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* MCI (SD/MMC)
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*/
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static struct mci_platform_data __initdata mci0_data = {
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.slot[0] = {
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.bus_width = 4,
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.detect_pin = AT91_PIN_PD10,
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},
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};
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static struct mci_platform_data __initdata mci1_data = {
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.slot[0] = {
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.bus_width = 4,
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.detect_pin = AT91_PIN_PD11,
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.wp_pin = AT91_PIN_PD29,
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},
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};
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/*
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* MACB Ethernet device
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*/
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@ -380,6 +401,9 @@ static void __init ek_board_init(void)
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at91_add_device_usba(&ek_usba_udc_data);
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/* SPI */
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at91_add_device_spi(ek_spi_devices, ARRAY_SIZE(ek_spi_devices));
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/* MMC */
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at91_add_device_mci(0, &mci0_data);
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at91_add_device_mci(1, &mci1_data);
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/* Ethernet */
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at91_add_device_eth(&ek_macb_data);
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/* NAND */
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@ -237,7 +237,7 @@ endchoice
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config MMC_ATMELMCI_DMA
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bool "Atmel MCI DMA support (EXPERIMENTAL)"
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depends on MMC_ATMELMCI && AVR32 && DMA_ENGINE && EXPERIMENTAL
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depends on MMC_ATMELMCI && (AVR32 || ARCH_AT91SAM9G45) && DMA_ENGINE && EXPERIMENTAL
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help
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Say Y here to have the Atmel MCI driver use a DMA engine to
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do data transfers and thus increase the throughput and
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