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#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
42static 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
74static struct davinci_nand_pdata davinci_nand_data = {
75	.mask_chipsel		= BIT(14),
76	.parts			= davinci_nand_partitions,
77	.nr_parts		= ARRAY_SIZE(davinci_nand_partitions),
78	.ecc_mode		= NAND_ECC_HW_SYNDROME,
79	.ecc_bits		= 4,
80	.bbt_options		= NAND_BBT_USE_FLASH,
81};
82
83static struct resource davinci_nand_resources[] = {
84	{
85		.start		= DM355_ASYNC_EMIF_DATA_CE0_BASE,
86		.end		= DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
87		.flags		= IORESOURCE_MEM,
88	}, {
89		.start		= DM355_ASYNC_EMIF_CONTROL_BASE,
90		.end		= DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
91		.flags		= IORESOURCE_MEM,
92	},
93};
94
95static struct platform_device davinci_nand_device = {
96	.name			= "davinci_nand",
97	.id			= 0,
98
99	.num_resources		= ARRAY_SIZE(davinci_nand_resources),
100	.resource		= davinci_nand_resources,
101
102	.dev			= {
103		.platform_data	= &davinci_nand_data,
104	},
105};
106
107static struct davinci_i2c_platform_data i2c_pdata = {
108	.bus_freq	= 400	/* kHz */,
109	.bus_delay	= 0	/* usec */,
110};
111
112static int leopard_mmc_gpio = -EINVAL;
113
114static void dm355leopard_mmcsd_gpios(unsigned gpio)
115{
116	gpio_request(gpio + 0, "mmc0_ro");
117	gpio_request(gpio + 1, "mmc0_cd");
118	gpio_request(gpio + 2, "mmc1_ro");
119	gpio_request(gpio + 3, "mmc1_cd");
120
121	/* we "know" these are input-only so we don't
122	 * need to call gpio_direction_input()
123	 */
124
125	leopard_mmc_gpio = gpio;
126}
127
128static struct i2c_board_info dm355leopard_i2c_info[] = {
129	{ I2C_BOARD_INFO("dm355leopard_msp", 0x25),
130		.platform_data = dm355leopard_mmcsd_gpios,
131		/* plus irq */ },
132	/* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
133	/* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
134};
135
136static void __init leopard_init_i2c(void)
137{
138	davinci_init_i2c(&i2c_pdata);
139
140	gpio_request(5, "dm355leopard_msp");
141	gpio_direction_input(5);
142	dm355leopard_i2c_info[0].irq = gpio_to_irq(5);
143
144	i2c_register_board_info(1, dm355leopard_i2c_info,
145			ARRAY_SIZE(dm355leopard_i2c_info));
146}
147
148static struct resource dm355leopard_dm9000_rsrc[] = {
149	{
150		/* addr */
151		.start	= 0x04000000,
152		.end	= 0x04000001,
153		.flags	= IORESOURCE_MEM,
154	}, {
155		/* data */
156		.start	= 0x04000016,
157		.end	= 0x04000017,
158		.flags	= IORESOURCE_MEM,
159	}, {
160		.flags	= IORESOURCE_IRQ
161			| IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
162	},
163};
164
165static struct platform_device dm355leopard_dm9000 = {
166	.name		= "dm9000",
167	.id		= -1,
168	.resource	= dm355leopard_dm9000_rsrc,
169	.num_resources	= ARRAY_SIZE(dm355leopard_dm9000_rsrc),
170};
171
172static struct platform_device *davinci_leopard_devices[] __initdata = {
173	&dm355leopard_dm9000,
174	&davinci_nand_device,
175};
176
177static void __init dm355_leopard_map_io(void)
178{
179	dm355_init();
180}
181
182static int dm355leopard_mmc_get_cd(int module)
183{
184	if (!gpio_is_valid(leopard_mmc_gpio))
185		return -ENXIO;
186	/* low == card present */
187	return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
188}
189
190static int dm355leopard_mmc_get_ro(int module)
191{
192	if (!gpio_is_valid(leopard_mmc_gpio))
193		return -ENXIO;
194	/* high == card's write protect switch active */
195	return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
196}
197
198static struct davinci_mmc_config dm355leopard_mmc_config = {
199	.get_cd		= dm355leopard_mmc_get_cd,
200	.get_ro		= dm355leopard_mmc_get_ro,
201	.wires		= 4,
202	.max_freq       = 50000000,
203	.caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
204};
205
206/* Don't connect anything to J10 unless you're only using USB host
207 * mode *and* have to do so with some kind of gender-bender.  If
208 * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
209 * the ID pin won't need any help.
210 */
211#define USB_ID_VALUE	1	/* ID pulled low */
212
213static struct spi_eeprom at25640a = {
214	.byte_len	= SZ_64K / 8,
215	.name		= "at25640a",
216	.page_size	= 32,
217	.flags		= EE_ADDR2,
218};
219
220static struct spi_board_info dm355_leopard_spi_info[] __initconst = {
221	{
222		.modalias	= "at25",
223		.platform_data	= &at25640a,
224		.max_speed_hz	= 10 * 1000 * 1000,	/* at 3v3 */
225		.bus_num	= 0,
226		.chip_select	= 0,
227		.mode		= SPI_MODE_0,
228	},
229};
230
231static __init void dm355_leopard_init(void)
232{
233	struct clk *aemif;
234	int ret;
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 (IS_ERR(aemif))
246		WARN("%s: unable to get AEMIF clock\n", __func__);
247	else
248		clk_prepare_enable(aemif);
249
250	platform_add_devices(davinci_leopard_devices,
251			     ARRAY_SIZE(davinci_leopard_devices));
252	leopard_init_i2c();
253	davinci_serial_init(dm355_serial_device);
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
272MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
273	.atag_offset  = 0x100,
274	.map_io	      = dm355_leopard_map_io,
275	.init_irq     = davinci_irq_init,
276	.init_time	= davinci_timer_init,
277	.init_machine = dm355_leopard_init,
278	.init_late	= davinci_init_late,
279	.dma_zone_size	= SZ_128M,
280	.restart	= davinci_restart,
281MACHINE_END
282