1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * DM355 leopard board support
4 *
5 * Based on board-dm355-evm.c
6 */
7 #include <linux/kernel.h>
8 #include <linux/init.h>
9 #include <linux/err.h>
10 #include <linux/platform_device.h>
11 #include <linux/mtd/mtd.h>
12 #include <linux/mtd/partitions.h>
13 #include <linux/mtd/rawnand.h>
14 #include <linux/i2c.h>
15 #include <linux/gpio.h>
16 #include <linux/clk.h>
17 #include <linux/spi/spi.h>
18 #include <linux/spi/eeprom.h>
19 #include <linux/platform_data/i2c-davinci.h>
20 #include <linux/platform_data/mmc-davinci.h>
21 #include <linux/platform_data/mtd-davinci.h>
22 #include <linux/platform_data/usb-davinci.h>
23
24 #include <asm/mach-types.h>
25 #include <asm/mach/arch.h>
26
27 #include "common.h"
28 #include "serial.h"
29 #include "davinci.h"
30
31 /* NOTE: this is geared for the standard config, with a socketed
32 * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors. If you
33 * swap chips, maybe with a different block size, partitioning may
34 * need to be changed.
35 */
36 #define NAND_BLOCK_SIZE SZ_128K
37
38 static struct mtd_partition davinci_nand_partitions[] = {
39 {
40 /* UBL (a few copies) plus U-Boot */
41 .name = "bootloader",
42 .offset = 0,
43 .size = 15 * NAND_BLOCK_SIZE,
44 .mask_flags = MTD_WRITEABLE, /* force read-only */
45 }, {
46 /* U-Boot environment */
47 .name = "params",
48 .offset = MTDPART_OFS_APPEND,
49 .size = 1 * NAND_BLOCK_SIZE,
50 .mask_flags = 0,
51 }, {
52 .name = "kernel",
53 .offset = MTDPART_OFS_APPEND,
54 .size = SZ_4M,
55 .mask_flags = 0,
56 }, {
57 .name = "filesystem1",
58 .offset = MTDPART_OFS_APPEND,
59 .size = SZ_512M,
60 .mask_flags = 0,
61 }, {
62 .name = "filesystem2",
63 .offset = MTDPART_OFS_APPEND,
64 .size = MTDPART_SIZ_FULL,
65 .mask_flags = 0,
66 }
67 /* two blocks with bad block table (and mirror) at the end */
68 };
69
70 static struct davinci_nand_pdata davinci_nand_data = {
71 .core_chipsel = 0,
72 .mask_chipsel = BIT(14),
73 .parts = davinci_nand_partitions,
74 .nr_parts = ARRAY_SIZE(davinci_nand_partitions),
75 .engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST,
76 .ecc_placement = NAND_ECC_PLACEMENT_INTERLEAVED,
77 .ecc_bits = 4,
78 .bbt_options = NAND_BBT_USE_FLASH,
79 };
80
81 static struct resource davinci_nand_resources[] = {
82 {
83 .start = DM355_ASYNC_EMIF_DATA_CE0_BASE,
84 .end = DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
85 .flags = IORESOURCE_MEM,
86 }, {
87 .start = DM355_ASYNC_EMIF_CONTROL_BASE,
88 .end = DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
89 .flags = IORESOURCE_MEM,
90 },
91 };
92
93 static struct platform_device davinci_nand_device = {
94 .name = "davinci_nand",
95 .id = 0,
96
97 .num_resources = ARRAY_SIZE(davinci_nand_resources),
98 .resource = davinci_nand_resources,
99
100 .dev = {
101 .platform_data = &davinci_nand_data,
102 },
103 };
104
105 static struct davinci_i2c_platform_data i2c_pdata = {
106 .bus_freq = 400 /* kHz */,
107 .bus_delay = 0 /* usec */,
108 };
109
110 static int leopard_mmc_gpio = -EINVAL;
111
dm355leopard_mmcsd_gpios(unsigned gpio)112 static void dm355leopard_mmcsd_gpios(unsigned gpio)
113 {
114 gpio_request(gpio + 0, "mmc0_ro");
115 gpio_request(gpio + 1, "mmc0_cd");
116 gpio_request(gpio + 2, "mmc1_ro");
117 gpio_request(gpio + 3, "mmc1_cd");
118
119 /* we "know" these are input-only so we don't
120 * need to call gpio_direction_input()
121 */
122
123 leopard_mmc_gpio = gpio;
124 }
125
126 static struct i2c_board_info dm355leopard_i2c_info[] = {
127 { I2C_BOARD_INFO("dm355leopard_msp", 0x25),
128 .platform_data = dm355leopard_mmcsd_gpios,
129 /* plus irq */ },
130 /* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
131 /* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
132 };
133
leopard_init_i2c(void)134 static void __init leopard_init_i2c(void)
135 {
136 davinci_init_i2c(&i2c_pdata);
137
138 gpio_request(5, "dm355leopard_msp");
139 gpio_direction_input(5);
140 dm355leopard_i2c_info[0].irq = gpio_to_irq(5);
141
142 i2c_register_board_info(1, dm355leopard_i2c_info,
143 ARRAY_SIZE(dm355leopard_i2c_info));
144 }
145
146 static struct resource dm355leopard_dm9000_rsrc[] = {
147 {
148 /* addr */
149 .start = 0x04000000,
150 .end = 0x04000001,
151 .flags = IORESOURCE_MEM,
152 }, {
153 /* data */
154 .start = 0x04000016,
155 .end = 0x04000017,
156 .flags = IORESOURCE_MEM,
157 }, {
158 .flags = IORESOURCE_IRQ
159 | IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
160 },
161 };
162
163 static struct platform_device dm355leopard_dm9000 = {
164 .name = "dm9000",
165 .id = -1,
166 .resource = dm355leopard_dm9000_rsrc,
167 .num_resources = ARRAY_SIZE(dm355leopard_dm9000_rsrc),
168 };
169
170 static struct platform_device *davinci_leopard_devices[] __initdata = {
171 &dm355leopard_dm9000,
172 &davinci_nand_device,
173 };
174
dm355_leopard_map_io(void)175 static void __init dm355_leopard_map_io(void)
176 {
177 dm355_init();
178 }
179
dm355leopard_mmc_get_cd(int module)180 static int dm355leopard_mmc_get_cd(int module)
181 {
182 if (!gpio_is_valid(leopard_mmc_gpio))
183 return -ENXIO;
184 /* low == card present */
185 return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
186 }
187
dm355leopard_mmc_get_ro(int module)188 static int dm355leopard_mmc_get_ro(int module)
189 {
190 if (!gpio_is_valid(leopard_mmc_gpio))
191 return -ENXIO;
192 /* high == card's write protect switch active */
193 return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
194 }
195
196 static struct davinci_mmc_config dm355leopard_mmc_config = {
197 .get_cd = dm355leopard_mmc_get_cd,
198 .get_ro = dm355leopard_mmc_get_ro,
199 .wires = 4,
200 .max_freq = 50000000,
201 .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
202 };
203
204 /* Don't connect anything to J10 unless you're only using USB host
205 * mode *and* have to do so with some kind of gender-bender. If
206 * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
207 * the ID pin won't need any help.
208 */
209 #define USB_ID_VALUE 1 /* ID pulled low */
210
211 static struct spi_eeprom at25640a = {
212 .byte_len = SZ_64K / 8,
213 .name = "at25640a",
214 .page_size = 32,
215 .flags = EE_ADDR2,
216 };
217
218 static const struct spi_board_info dm355_leopard_spi_info[] __initconst = {
219 {
220 .modalias = "at25",
221 .platform_data = &at25640a,
222 .max_speed_hz = 10 * 1000 * 1000, /* at 3v3 */
223 .bus_num = 0,
224 .chip_select = 0,
225 .mode = SPI_MODE_0,
226 },
227 };
228
dm355_leopard_init(void)229 static __init void dm355_leopard_init(void)
230 {
231 struct clk *aemif;
232 int ret;
233
234 dm355_register_clocks();
235
236 ret = dm355_gpio_register();
237 if (ret)
238 pr_warn("%s: GPIO init failed: %d\n", __func__, ret);
239
240 gpio_request(9, "dm9000");
241 gpio_direction_input(9);
242 dm355leopard_dm9000_rsrc[2].start = gpio_to_irq(9);
243
244 aemif = clk_get(&dm355leopard_dm9000.dev, "aemif");
245 if (!WARN(IS_ERR(aemif), "unable to get AEMIF clock\n"))
246 clk_prepare_enable(aemif);
247
248 platform_add_devices(davinci_leopard_devices,
249 ARRAY_SIZE(davinci_leopard_devices));
250 leopard_init_i2c();
251 davinci_serial_init(dm355_serial_device);
252
253 /* NOTE: NAND flash timings set by the UBL are slower than
254 * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
255 * but could be 0x0400008c for about 25% faster page reads.
256 */
257
258 gpio_request(2, "usb_id_toggle");
259 gpio_direction_output(2, USB_ID_VALUE);
260 /* irlml6401 switches over 1A in under 8 msec */
261 davinci_setup_usb(1000, 8);
262
263 davinci_setup_mmc(0, &dm355leopard_mmc_config);
264 davinci_setup_mmc(1, &dm355leopard_mmc_config);
265
266 dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
267 ARRAY_SIZE(dm355_leopard_spi_info));
268 }
269
270 MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
271 .atag_offset = 0x100,
272 .map_io = dm355_leopard_map_io,
273 .init_irq = dm355_init_irq,
274 .init_time = dm355_init_time,
275 .init_machine = dm355_leopard_init,
276 .init_late = davinci_init_late,
277 .dma_zone_size = SZ_128M,
278 MACHINE_END
279