1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Platform support for LPC32xx SoC
4 *
5 * Author: Kevin Wells <kevin.wells@nxp.com>
6 *
7 * Copyright (C) 2012 Roland Stigge <stigge@antcom.de>
8 * Copyright (C) 2010 NXP Semiconductors
9 */
10
11 #include <linux/amba/pl08x.h>
12 #include <linux/mtd/lpc32xx_mlc.h>
13 #include <linux/mtd/lpc32xx_slc.h>
14 #include <linux/of_platform.h>
15
16 #include <asm/mach/arch.h>
17 #include "common.h"
18
19 static struct pl08x_channel_data pl08x_slave_channels[] = {
20 {
21 .bus_id = "nand-slc",
22 .min_signal = 1, /* SLC NAND Flash */
23 .max_signal = 1,
24 .periph_buses = PL08X_AHB1,
25 },
26 {
27 .bus_id = "nand-mlc",
28 .min_signal = 12, /* MLC NAND Flash */
29 .max_signal = 12,
30 .periph_buses = PL08X_AHB1,
31 },
32 };
33
pl08x_get_signal(const struct pl08x_channel_data * cd)34 static int pl08x_get_signal(const struct pl08x_channel_data *cd)
35 {
36 return cd->min_signal;
37 }
38
pl08x_put_signal(const struct pl08x_channel_data * cd,int ch)39 static void pl08x_put_signal(const struct pl08x_channel_data *cd, int ch)
40 {
41 }
42
43 static struct pl08x_platform_data pl08x_pd = {
44 /* Some reasonable memcpy defaults */
45 .memcpy_burst_size = PL08X_BURST_SZ_256,
46 .memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
47 .slave_channels = &pl08x_slave_channels[0],
48 .num_slave_channels = ARRAY_SIZE(pl08x_slave_channels),
49 .get_xfer_signal = pl08x_get_signal,
50 .put_xfer_signal = pl08x_put_signal,
51 .lli_buses = PL08X_AHB1,
52 .mem_buses = PL08X_AHB1,
53 };
54
55 static struct lpc32xx_slc_platform_data lpc32xx_slc_data = {
56 .dma_filter = pl08x_filter_id,
57 };
58
59 static struct lpc32xx_mlc_platform_data lpc32xx_mlc_data = {
60 .dma_filter = pl08x_filter_id,
61 };
62
63 static const struct of_dev_auxdata lpc32xx_auxdata_lookup[] __initconst = {
64 OF_DEV_AUXDATA("arm,pl080", 0x31000000, "pl08xdmac", &pl08x_pd),
65 OF_DEV_AUXDATA("nxp,lpc3220-slc", 0x20020000, "20020000.flash",
66 &lpc32xx_slc_data),
67 OF_DEV_AUXDATA("nxp,lpc3220-mlc", 0x200a8000, "200a8000.flash",
68 &lpc32xx_mlc_data),
69 { }
70 };
71
lpc3250_machine_init(void)72 static void __init lpc3250_machine_init(void)
73 {
74 lpc32xx_serial_init();
75
76 of_platform_default_populate(NULL, lpc32xx_auxdata_lookup, NULL);
77 }
78
79 static const char *const lpc32xx_dt_compat[] __initconst = {
80 "nxp,lpc3220",
81 "nxp,lpc3230",
82 "nxp,lpc3240",
83 "nxp,lpc3250",
84 NULL
85 };
86
87 DT_MACHINE_START(LPC32XX_DT, "LPC32XX SoC (Flattened Device Tree)")
88 .atag_offset = 0x100,
89 .map_io = lpc32xx_map_io,
90 .init_machine = lpc3250_machine_init,
91 .dt_compat = lpc32xx_dt_compat,
92 MACHINE_END
93