a8d2b3d172f9531f0f3d4912997019d893d26f81
[linux-2.6-microblaze.git] / arch / m68k / coldfire / stmark2.c
1 /*
2  * stmark2.c -- Support for Sysam AMCORE open board
3  *
4  * (C) Copyright 2017, Angelo Dureghello <angelo@sysam.it>
5  *
6  * This file is subject to the terms and conditions of the GNU General Public
7  * License.  See the file COPYING in the main directory of this archive
8  * for more details.
9  */
10
11 #include <linux/platform_device.h>
12 #include <linux/mtd/partitions.h>
13 #include <linux/spi/spi.h>
14 #include <linux/spi/spi-fsl-dspi.h>
15 #include <linux/spi/flash.h>
16 #include <asm/mcfsim.h>
17
18 /*
19  * Partitioning of parallel NOR flash (39VF3201B)
20  */
21 static struct mtd_partition stmark2_partitions[] = {
22         {
23                 .name = "U-Boot (1024K)",
24                 .size = 0x100000,
25                 .offset = 0x0
26         }, {
27                 .name = "Kernel+initramfs (7168K)",
28                 .size = 0x700000,
29                 .offset = MTDPART_OFS_APPEND
30         }, {
31                 .name = "Flash Free Space (8192K)",
32                 .size = MTDPART_SIZ_FULL,
33                 .offset = MTDPART_OFS_APPEND
34         }
35 };
36
37 static struct flash_platform_data stmark2_spi_flash_data = {
38         .name = "is25lp128",
39         .parts = stmark2_partitions,
40         .nr_parts = ARRAY_SIZE(stmark2_partitions),
41         .type = "is25lp128",
42 };
43
44 static struct spi_board_info stmark2_board_info[] __initdata = {
45         {
46                 .modalias = "m25p80",
47                 .max_speed_hz = 5000000,
48                 .bus_num = 0,
49                 .chip_select = 1,
50                 .platform_data = &stmark2_spi_flash_data,
51                 .mode = SPI_MODE_3,
52         }
53 };
54
55 /* SPI controller data, SPI (0) */
56 static struct fsl_dspi_platform_data dspi_spi0_info = {
57         .cs_num = 4,
58         .bus_num = 0,
59         .sck_cs_delay = 100,
60         .cs_sck_delay = 100,
61 };
62
63 static struct resource dspi_spi0_resource[] = {
64         [0] = {
65                 .start = MCFDSPI_BASE0,
66                 .end   = MCFDSPI_BASE0 + 0xFF,
67                 .flags = IORESOURCE_MEM,
68                 },
69         [1] = {
70                 .start = 12,
71                 .end   = 13,
72                 .flags = IORESOURCE_DMA,
73         },
74         [2] = {
75                 .start = MCF_IRQ_DSPI0,
76                 .end   = MCF_IRQ_DSPI0,
77                 .flags = IORESOURCE_IRQ,
78         },
79 };
80
81 /* SPI controller, id = bus number */
82 static struct platform_device dspi_spi0_device = {
83         .name = "fsl-dspi",
84         .id = 0,
85         .num_resources = ARRAY_SIZE(dspi_spi0_resource),
86         .resource = dspi_spi0_resource,
87         .dev = {
88                 .platform_data = &dspi_spi0_info,
89         },
90 };
91
92 static struct platform_device *stmark2_devices[] __initdata = {
93         &dspi_spi0_device,
94 };
95
96 /*
97  * Note: proper pin-mux setup is mandatory for proper SPI functionality.
98  */
99 static int __init init_stmark2(void)
100 {
101         /* DSPI0, all pins as DSPI, and using CS1 */
102         __raw_writeb(0x80, MCFGPIO_PAR_DSPIOWL);
103         __raw_writeb(0xfc, MCFGPIO_PAR_DSPIOWH);
104
105         /* Board gpio setup */
106         __raw_writeb(0x00, MCFGPIO_PAR_BE);
107         __raw_writeb(0x00, MCFGPIO_PAR_FBCTL);
108         __raw_writeb(0x00, MCFGPIO_PAR_CS);
109         __raw_writeb(0x00, MCFGPIO_PAR_CANI2C);
110
111         platform_add_devices(stmark2_devices, ARRAY_SIZE(stmark2_devices));
112
113         spi_register_board_info(stmark2_board_info,
114                                 ARRAY_SIZE(stmark2_board_info));
115
116         return 0;
117 }
118
119 late_initcall(init_stmark2);