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126 lines
2.8 KiB
126 lines
2.8 KiB
/* |
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* stmark2.c -- Support for Sysam AMCORE open board |
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* |
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* (C) Copyright 2017, Angelo Dureghello <[email protected]> |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive |
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* for more details. |
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*/ |
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#include <linux/platform_device.h> |
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#include <linux/mtd/partitions.h> |
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#include <linux/spi/spi.h> |
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#include <linux/spi/spi-fsl-dspi.h> |
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#include <linux/spi/flash.h> |
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#include <linux/dma-mapping.h> |
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#include <asm/mcfsim.h> |
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/* |
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* Partitioning of parallel NOR flash (39VF3201B) |
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*/ |
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static struct mtd_partition stmark2_partitions[] = { |
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{ |
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.name = "U-Boot (1024K)", |
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.size = 0x100000, |
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.offset = 0x0 |
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}, { |
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.name = "Kernel+initramfs (7168K)", |
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.size = 0x700000, |
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.offset = MTDPART_OFS_APPEND |
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}, { |
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.name = "Flash Free Space (8192K)", |
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.size = MTDPART_SIZ_FULL, |
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.offset = MTDPART_OFS_APPEND |
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} |
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}; |
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static struct flash_platform_data stmark2_spi_flash_data = { |
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.name = "is25lp128", |
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.parts = stmark2_partitions, |
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.nr_parts = ARRAY_SIZE(stmark2_partitions), |
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.type = "is25lp128", |
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}; |
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static struct spi_board_info stmark2_board_info[] __initdata = { |
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{ |
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.modalias = "m25p80", |
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.max_speed_hz = 5000000, |
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.bus_num = 0, |
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.chip_select = 1, |
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.platform_data = &stmark2_spi_flash_data, |
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.mode = SPI_MODE_3, |
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} |
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}; |
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/* SPI controller data, SPI (0) */ |
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static struct fsl_dspi_platform_data dspi_spi0_info = { |
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.cs_num = 4, |
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.bus_num = 0, |
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.sck_cs_delay = 100, |
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.cs_sck_delay = 100, |
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}; |
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static struct resource dspi_spi0_resource[] = { |
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[0] = { |
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.start = MCFDSPI_BASE0, |
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.end = MCFDSPI_BASE0 + 0xFF, |
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.flags = IORESOURCE_MEM, |
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}, |
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[1] = { |
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.start = 12, |
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.end = 13, |
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.flags = IORESOURCE_DMA, |
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}, |
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[2] = { |
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.start = MCF_IRQ_DSPI0, |
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.end = MCF_IRQ_DSPI0, |
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.flags = IORESOURCE_IRQ, |
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}, |
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}; |
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static u64 stmark2_dspi_mask = DMA_BIT_MASK(32); |
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/* SPI controller, id = bus number */ |
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static struct platform_device dspi_spi0_device = { |
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.name = "fsl-dspi", |
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.id = 0, |
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.num_resources = ARRAY_SIZE(dspi_spi0_resource), |
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.resource = dspi_spi0_resource, |
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.dev = { |
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.platform_data = &dspi_spi0_info, |
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.dma_mask = &stmark2_dspi_mask, |
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.coherent_dma_mask = DMA_BIT_MASK(32), |
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}, |
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}; |
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static struct platform_device *stmark2_devices[] __initdata = { |
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&dspi_spi0_device, |
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}; |
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/* |
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* Note: proper pin-mux setup is mandatory for proper SPI functionality. |
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*/ |
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static int __init init_stmark2(void) |
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{ |
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/* DSPI0, all pins as DSPI, and using CS1 */ |
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__raw_writeb(0x80, MCFGPIO_PAR_DSPIOWL); |
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__raw_writeb(0xfc, MCFGPIO_PAR_DSPIOWH); |
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/* Board gpio setup */ |
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__raw_writeb(0x00, MCFGPIO_PAR_BE); |
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__raw_writeb(0x00, MCFGPIO_PAR_FBCTL); |
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__raw_writeb(0x00, MCFGPIO_PAR_CS); |
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/* CAN pads */ |
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__raw_writeb(0x50, MCFGPIO_PAR_CANI2C); |
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platform_add_devices(stmark2_devices, ARRAY_SIZE(stmark2_devices)); |
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spi_register_board_info(stmark2_board_info, |
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ARRAY_SIZE(stmark2_board_info)); |
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return 0; |
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} |
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device_initcall(init_stmark2);
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