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/nand.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
23 #include <asm/mach-types.h>
24 #include <asm/mach/arch.h>
25
26 #include <mach/dm355.h>
27 #include <mach/i2c.h>
28 #include <mach/serial.h>
29 #include <mach/nand.h>
30 #include <mach/mmc.h>
31 #include <mach/usb.h>
32
33 /* NOTE: this is geared for the standard config, with a socketed
34 * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors. If you
35 * swap chips, maybe with a different block size, partitioning may
36 * need to be changed.
37 */
38 #define NAND_BLOCK_SIZE SZ_128K
39
40 static struct mtd_partition davinci_nand_partitions[] = {
41 {
42 /* UBL (a few copies) plus U-Boot */
43 .name = "bootloader",
44 .offset = 0,
45 .size = 15 * NAND_BLOCK_SIZE,
46 .mask_flags = MTD_WRITEABLE, /* force read-only */
47 }, {
48 /* U-Boot environment */
49 .name = "params",
50 .offset = MTDPART_OFS_APPEND,
51 .size = 1 * NAND_BLOCK_SIZE,
52 .mask_flags = 0,
53 }, {
54 .name = "kernel",
55 .offset = MTDPART_OFS_APPEND,
56 .size = SZ_4M,
57 .mask_flags = 0,
58 }, {
59 .name = "filesystem1",
60 .offset = MTDPART_OFS_APPEND,
61 .size = SZ_512M,
62 .mask_flags = 0,
63 }, {
64 .name = "filesystem2",
65 .offset = MTDPART_OFS_APPEND,
66 .size = MTDPART_SIZ_FULL,
67 .mask_flags = 0,
68 }
69 /* two blocks with bad block table (and mirror) at the end */
70 };
71
72 static struct davinci_nand_pdata davinci_nand_data = {
73 .mask_chipsel = BIT(14),
74 .parts = davinci_nand_partitions,
75 .nr_parts = ARRAY_SIZE(davinci_nand_partitions),
76 .ecc_mode = NAND_ECC_HW_SYNDROME,
77 .options = NAND_USE_FLASH_BBT,
78 };
79
80 static struct resource davinci_nand_resources[] = {
81 {
82 .start = DM355_ASYNC_EMIF_DATA_CE0_BASE,
83 .end = DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
84 .flags = IORESOURCE_MEM,
85 }, {
86 .start = DM355_ASYNC_EMIF_CONTROL_BASE,
87 .end = DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
88 .flags = IORESOURCE_MEM,
89 },
90 };
91
92 static struct platform_device davinci_nand_device = {
93 .name = "davinci_nand",
94 .id = 0,
95
96 .num_resources = ARRAY_SIZE(davinci_nand_resources),
97 .resource = davinci_nand_resources,
98
99 .dev = {
100 .platform_data = &davinci_nand_data,
101 },
102 };
103
104 static struct davinci_i2c_platform_data i2c_pdata = {
105 .bus_freq = 400 /* kHz */,
106 .bus_delay = 0 /* usec */,
107 };
108
109 static int leopard_mmc_gpio = -EINVAL;
110
dm355leopard_mmcsd_gpios(unsigned gpio)111 static void dm355leopard_mmcsd_gpios(unsigned gpio)
112 {
113 gpio_request(gpio + 0, "mmc0_ro");
114 gpio_request(gpio + 1, "mmc0_cd");
115 gpio_request(gpio + 2, "mmc1_ro");
116 gpio_request(gpio + 3, "mmc1_cd");
117
118 /* we "know" these are input-only so we don't
119 * need to call gpio_direction_input()
120 */
121
122 leopard_mmc_gpio = gpio;
123 }
124
125 static struct i2c_board_info dm355leopard_i2c_info[] = {
126 { I2C_BOARD_INFO("dm355leopard_msp", 0x25),
127 .platform_data = dm355leopard_mmcsd_gpios,
128 /* plus irq */ },
129 /* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
130 /* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
131 };
132
leopard_init_i2c(void)133 static void __init leopard_init_i2c(void)
134 {
135 davinci_init_i2c(&i2c_pdata);
136
137 gpio_request(5, "dm355leopard_msp");
138 gpio_direction_input(5);
139 dm355leopard_i2c_info[0].irq = gpio_to_irq(5);
140
141 i2c_register_board_info(1, dm355leopard_i2c_info,
142 ARRAY_SIZE(dm355leopard_i2c_info));
143 }
144
145 static struct resource dm355leopard_dm9000_rsrc[] = {
146 {
147 /* addr */
148 .start = 0x04000000,
149 .end = 0x04000001,
150 .flags = IORESOURCE_MEM,
151 }, {
152 /* data */
153 .start = 0x04000016,
154 .end = 0x04000017,
155 .flags = IORESOURCE_MEM,
156 }, {
157 .flags = IORESOURCE_IRQ
158 | IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
159 },
160 };
161
162 static struct platform_device dm355leopard_dm9000 = {
163 .name = "dm9000",
164 .id = -1,
165 .resource = dm355leopard_dm9000_rsrc,
166 .num_resources = ARRAY_SIZE(dm355leopard_dm9000_rsrc),
167 };
168
169 static struct platform_device *davinci_leopard_devices[] __initdata = {
170 &dm355leopard_dm9000,
171 &davinci_nand_device,
172 };
173
174 static struct davinci_uart_config uart_config __initdata = {
175 .enabled_uarts = (1 << 0),
176 };
177
dm355_leopard_map_io(void)178 static void __init dm355_leopard_map_io(void)
179 {
180 dm355_init();
181 }
182
dm355leopard_mmc_get_cd(int module)183 static int dm355leopard_mmc_get_cd(int module)
184 {
185 if (!gpio_is_valid(leopard_mmc_gpio))
186 return -ENXIO;
187 /* low == card present */
188 return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
189 }
190
dm355leopard_mmc_get_ro(int module)191 static int dm355leopard_mmc_get_ro(int module)
192 {
193 if (!gpio_is_valid(leopard_mmc_gpio))
194 return -ENXIO;
195 /* high == card's write protect switch active */
196 return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
197 }
198
199 static struct davinci_mmc_config dm355leopard_mmc_config = {
200 .get_cd = dm355leopard_mmc_get_cd,
201 .get_ro = dm355leopard_mmc_get_ro,
202 .wires = 4,
203 .max_freq = 50000000,
204 .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
205 };
206
207 /* Don't connect anything to J10 unless you're only using USB host
208 * mode *and* have to do so with some kind of gender-bender. If
209 * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
210 * the ID pin won't need any help.
211 */
212 #ifdef CONFIG_USB_MUSB_PERIPHERAL
213 #define USB_ID_VALUE 0 /* ID pulled high; *should* float */
214 #else
215 #define USB_ID_VALUE 1 /* ID pulled low */
216 #endif
217
218 static struct spi_eeprom at25640a = {
219 .byte_len = SZ_64K / 8,
220 .name = "at25640a",
221 .page_size = 32,
222 .flags = EE_ADDR2,
223 };
224
225 static struct spi_board_info dm355_leopard_spi_info[] __initconst = {
226 {
227 .modalias = "at25",
228 .platform_data = &at25640a,
229 .max_speed_hz = 10 * 1000 * 1000, /* at 3v3 */
230 .bus_num = 0,
231 .chip_select = 0,
232 .mode = SPI_MODE_0,
233 },
234 };
235
dm355_leopard_init(void)236 static __init void dm355_leopard_init(void)
237 {
238 struct clk *aemif;
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 (IS_ERR(aemif))
246 WARN("%s: unable to get AEMIF clock\n", __func__);
247 else
248 clk_enable(aemif);
249
250 platform_add_devices(davinci_leopard_devices,
251 ARRAY_SIZE(davinci_leopard_devices));
252 leopard_init_i2c();
253 davinci_serial_init(&uart_config);
254
255 /* NOTE: NAND flash timings set by the UBL are slower than
256 * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
257 * but could be 0x0400008c for about 25% faster page reads.
258 */
259
260 gpio_request(2, "usb_id_toggle");
261 gpio_direction_output(2, USB_ID_VALUE);
262 /* irlml6401 switches over 1A in under 8 msec */
263 davinci_setup_usb(1000, 8);
264
265 davinci_setup_mmc(0, &dm355leopard_mmc_config);
266 davinci_setup_mmc(1, &dm355leopard_mmc_config);
267
268 dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
269 ARRAY_SIZE(dm355_leopard_spi_info));
270 }
271
272 MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
273 .boot_params = (0x80000100),
274 .map_io = dm355_leopard_map_io,
275 .init_irq = davinci_irq_init,
276 .timer = &davinci_timer,
277 .init_machine = dm355_leopard_init,
278 MACHINE_END
279