1 /*
2 * DM355 leopard board support
3 *
4 * Based on board-dm355-evm.c
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 */
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/err.h>
13 #include <linux/platform_device.h>
14 #include <linux/mtd/mtd.h>
15 #include <linux/mtd/partitions.h>
16 #include <linux/mtd/rawnand.h>
17 #include <linux/i2c.h>
18 #include <linux/gpio.h>
19 #include <linux/clk.h>
20 #include <linux/spi/spi.h>
21 #include <linux/spi/eeprom.h>
22 #include <linux/platform_data/i2c-davinci.h>
23 #include <linux/platform_data/mmc-davinci.h>
24 #include <linux/platform_data/mtd-davinci.h>
25 #include <linux/platform_data/usb-davinci.h>
26
27 #include <asm/mach-types.h>
28 #include <asm/mach/arch.h>
29
30 #include <mach/common.h>
31 #include <mach/serial.h>
32
33 #include "davinci.h"
34
35 /* NOTE: this is geared for the standard config, with a socketed
36 * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors. If you
37 * swap chips, maybe with a different block size, partitioning may
38 * need to be changed.
39 */
40 #define NAND_BLOCK_SIZE SZ_128K
41
42 static struct mtd_partition davinci_nand_partitions[] = {
43 {
44 /* UBL (a few copies) plus U-Boot */
45 .name = "bootloader",
46 .offset = 0,
47 .size = 15 * NAND_BLOCK_SIZE,
48 .mask_flags = MTD_WRITEABLE, /* force read-only */
49 }, {
50 /* U-Boot environment */
51 .name = "params",
52 .offset = MTDPART_OFS_APPEND,
53 .size = 1 * NAND_BLOCK_SIZE,
54 .mask_flags = 0,
55 }, {
56 .name = "kernel",
57 .offset = MTDPART_OFS_APPEND,
58 .size = SZ_4M,
59 .mask_flags = 0,
60 }, {
61 .name = "filesystem1",
62 .offset = MTDPART_OFS_APPEND,
63 .size = SZ_512M,
64 .mask_flags = 0,
65 }, {
66 .name = "filesystem2",
67 .offset = MTDPART_OFS_APPEND,
68 .size = MTDPART_SIZ_FULL,
69 .mask_flags = 0,
70 }
71 /* two blocks with bad block table (and mirror) at the end */
72 };
73
74 static struct davinci_nand_pdata davinci_nand_data = {
75 .core_chipsel = 0,
76 .mask_chipsel = BIT(14),
77 .parts = davinci_nand_partitions,
78 .nr_parts = ARRAY_SIZE(davinci_nand_partitions),
79 .engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST,
80 .ecc_placement = NAND_ECC_PLACEMENT_INTERLEAVED,
81 .ecc_bits = 4,
82 .bbt_options = NAND_BBT_USE_FLASH,
83 };
84
85 static struct resource davinci_nand_resources[] = {
86 {
87 .start = DM355_ASYNC_EMIF_DATA_CE0_BASE,
88 .end = DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
89 .flags = IORESOURCE_MEM,
90 }, {
91 .start = DM355_ASYNC_EMIF_CONTROL_BASE,
92 .end = DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
93 .flags = IORESOURCE_MEM,
94 },
95 };
96
97 static struct platform_device davinci_nand_device = {
98 .name = "davinci_nand",
99 .id = 0,
100
101 .num_resources = ARRAY_SIZE(davinci_nand_resources),
102 .resource = davinci_nand_resources,
103
104 .dev = {
105 .platform_data = &davinci_nand_data,
106 },
107 };
108
109 static struct davinci_i2c_platform_data i2c_pdata = {
110 .bus_freq = 400 /* kHz */,
111 .bus_delay = 0 /* usec */,
112 };
113
114 static int leopard_mmc_gpio = -EINVAL;
115
dm355leopard_mmcsd_gpios(unsigned gpio)116 static void dm355leopard_mmcsd_gpios(unsigned gpio)
117 {
118 gpio_request(gpio + 0, "mmc0_ro");
119 gpio_request(gpio + 1, "mmc0_cd");
120 gpio_request(gpio + 2, "mmc1_ro");
121 gpio_request(gpio + 3, "mmc1_cd");
122
123 /* we "know" these are input-only so we don't
124 * need to call gpio_direction_input()
125 */
126
127 leopard_mmc_gpio = gpio;
128 }
129
130 static struct i2c_board_info dm355leopard_i2c_info[] = {
131 { I2C_BOARD_INFO("dm355leopard_msp", 0x25),
132 .platform_data = dm355leopard_mmcsd_gpios,
133 /* plus irq */ },
134 /* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
135 /* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
136 };
137
leopard_init_i2c(void)138 static void __init leopard_init_i2c(void)
139 {
140 davinci_init_i2c(&i2c_pdata);
141
142 gpio_request(5, "dm355leopard_msp");
143 gpio_direction_input(5);
144 dm355leopard_i2c_info[0].irq = gpio_to_irq(5);
145
146 i2c_register_board_info(1, dm355leopard_i2c_info,
147 ARRAY_SIZE(dm355leopard_i2c_info));
148 }
149
150 static struct resource dm355leopard_dm9000_rsrc[] = {
151 {
152 /* addr */
153 .start = 0x04000000,
154 .end = 0x04000001,
155 .flags = IORESOURCE_MEM,
156 }, {
157 /* data */
158 .start = 0x04000016,
159 .end = 0x04000017,
160 .flags = IORESOURCE_MEM,
161 }, {
162 .flags = IORESOURCE_IRQ
163 | IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
164 },
165 };
166
167 static struct platform_device dm355leopard_dm9000 = {
168 .name = "dm9000",
169 .id = -1,
170 .resource = dm355leopard_dm9000_rsrc,
171 .num_resources = ARRAY_SIZE(dm355leopard_dm9000_rsrc),
172 };
173
174 static struct platform_device *davinci_leopard_devices[] __initdata = {
175 &dm355leopard_dm9000,
176 &davinci_nand_device,
177 };
178
dm355_leopard_map_io(void)179 static void __init dm355_leopard_map_io(void)
180 {
181 dm355_init();
182 }
183
dm355leopard_mmc_get_cd(int module)184 static int dm355leopard_mmc_get_cd(int module)
185 {
186 if (!gpio_is_valid(leopard_mmc_gpio))
187 return -ENXIO;
188 /* low == card present */
189 return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
190 }
191
dm355leopard_mmc_get_ro(int module)192 static int dm355leopard_mmc_get_ro(int module)
193 {
194 if (!gpio_is_valid(leopard_mmc_gpio))
195 return -ENXIO;
196 /* high == card's write protect switch active */
197 return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
198 }
199
200 static struct davinci_mmc_config dm355leopard_mmc_config = {
201 .get_cd = dm355leopard_mmc_get_cd,
202 .get_ro = dm355leopard_mmc_get_ro,
203 .wires = 4,
204 .max_freq = 50000000,
205 .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
206 };
207
208 /* Don't connect anything to J10 unless you're only using USB host
209 * mode *and* have to do so with some kind of gender-bender. If
210 * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
211 * the ID pin won't need any help.
212 */
213 #define USB_ID_VALUE 1 /* ID pulled low */
214
215 static struct spi_eeprom at25640a = {
216 .byte_len = SZ_64K / 8,
217 .name = "at25640a",
218 .page_size = 32,
219 .flags = EE_ADDR2,
220 };
221
222 static const struct spi_board_info dm355_leopard_spi_info[] __initconst = {
223 {
224 .modalias = "at25",
225 .platform_data = &at25640a,
226 .max_speed_hz = 10 * 1000 * 1000, /* at 3v3 */
227 .bus_num = 0,
228 .chip_select = 0,
229 .mode = SPI_MODE_0,
230 },
231 };
232
dm355_leopard_init(void)233 static __init void dm355_leopard_init(void)
234 {
235 struct clk *aemif;
236 int ret;
237
238 dm355_register_clocks();
239
240 ret = dm355_gpio_register();
241 if (ret)
242 pr_warn("%s: GPIO init failed: %d\n", __func__, ret);
243
244 gpio_request(9, "dm9000");
245 gpio_direction_input(9);
246 dm355leopard_dm9000_rsrc[2].start = gpio_to_irq(9);
247
248 aemif = clk_get(&dm355leopard_dm9000.dev, "aemif");
249 if (!WARN(IS_ERR(aemif), "unable to get AEMIF clock\n"))
250 clk_prepare_enable(aemif);
251
252 platform_add_devices(davinci_leopard_devices,
253 ARRAY_SIZE(davinci_leopard_devices));
254 leopard_init_i2c();
255 davinci_serial_init(dm355_serial_device);
256
257 /* NOTE: NAND flash timings set by the UBL are slower than
258 * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
259 * but could be 0x0400008c for about 25% faster page reads.
260 */
261
262 gpio_request(2, "usb_id_toggle");
263 gpio_direction_output(2, USB_ID_VALUE);
264 /* irlml6401 switches over 1A in under 8 msec */
265 davinci_setup_usb(1000, 8);
266
267 davinci_setup_mmc(0, &dm355leopard_mmc_config);
268 davinci_setup_mmc(1, &dm355leopard_mmc_config);
269
270 dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
271 ARRAY_SIZE(dm355_leopard_spi_info));
272 }
273
274 MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
275 .atag_offset = 0x100,
276 .map_io = dm355_leopard_map_io,
277 .init_irq = dm355_init_irq,
278 .init_time = dm355_init_time,
279 .init_machine = dm355_leopard_init,
280 .init_late = davinci_init_late,
281 .dma_zone_size = SZ_128M,
282 MACHINE_END
283