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96974a24 MR |
1 | /* |
2 | * common-board-devices.c | |
3 | * | |
4 | * Copyright (C) 2011 CompuLab, Ltd. | |
5 | * Author: Mike Rapoport <mike@compulab.co.il> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * version 2 as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
19 | * 02110-1301 USA | |
20 | * | |
21 | */ | |
22 | ||
23 | #include <linux/gpio.h> | |
24 | #include <linux/spi/spi.h> | |
25 | #include <linux/spi/ads7846.h> | |
26 | ||
2203747c AB |
27 | #include <linux/platform_data/spi-omap2-mcspi.h> |
28 | #include <linux/platform_data/mtd-nand-omap2.h> | |
96974a24 | 29 | |
7d7e1eba | 30 | #include "common.h" |
96974a24 MR |
31 | #include "common-board-devices.h" |
32 | ||
9a3f39ff MR |
33 | #if defined(CONFIG_TOUCHSCREEN_ADS7846) || \ |
34 | defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE) | |
96974a24 MR |
35 | static struct omap2_mcspi_device_config ads7846_mcspi_config = { |
36 | .turbo_mode = 0, | |
96974a24 MR |
37 | }; |
38 | ||
39 | static struct ads7846_platform_data ads7846_config = { | |
40 | .x_max = 0x0fff, | |
41 | .y_max = 0x0fff, | |
42 | .x_plate_ohms = 180, | |
43 | .pressure_max = 255, | |
44 | .debounce_max = 10, | |
45 | .debounce_tol = 3, | |
46 | .debounce_rep = 1, | |
47 | .gpio_pendown = -EINVAL, | |
48 | .keep_vref_on = 1, | |
49 | }; | |
50 | ||
51 | static struct spi_board_info ads7846_spi_board_info __initdata = { | |
52 | .modalias = "ads7846", | |
53 | .bus_num = -EINVAL, | |
54 | .chip_select = 0, | |
55 | .max_speed_hz = 1500000, | |
56 | .controller_data = &ads7846_mcspi_config, | |
57 | .irq = -EINVAL, | |
58 | .platform_data = &ads7846_config, | |
59 | }; | |
60 | ||
61 | void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce, | |
62 | struct ads7846_platform_data *board_pdata) | |
63 | { | |
64 | struct spi_board_info *spi_bi = &ads7846_spi_board_info; | |
65 | int err; | |
66 | ||
97ee9f01 IG |
67 | err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown"); |
68 | if (err) { | |
69 | pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err); | |
70 | return; | |
96974a24 MR |
71 | } |
72 | ||
97ee9f01 IG |
73 | if (gpio_debounce) |
74 | gpio_set_debounce(gpio_pendown, gpio_debounce); | |
75 | ||
96974a24 | 76 | spi_bi->bus_num = bus_num; |
46a0a540 | 77 | spi_bi->irq = gpio_to_irq(gpio_pendown); |
96974a24 | 78 | |
7db74d5e IY |
79 | if (board_pdata) { |
80 | board_pdata->gpio_pendown = gpio_pendown; | |
96974a24 | 81 | spi_bi->platform_data = board_pdata; |
97ee9f01 IG |
82 | if (board_pdata->get_pendown_state) |
83 | gpio_export(gpio_pendown, 0); | |
7db74d5e IY |
84 | } else { |
85 | ads7846_config.gpio_pendown = gpio_pendown; | |
86 | } | |
96974a24 | 87 | |
97ee9f01 IG |
88 | if (!board_pdata || (board_pdata && !board_pdata->get_pendown_state)) |
89 | gpio_free(gpio_pendown); | |
90 | ||
96974a24 MR |
91 | spi_register_board_info(&ads7846_spi_board_info, 1); |
92 | } | |
9a3f39ff MR |
93 | #else |
94 | void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce, | |
95 | struct ads7846_platform_data *board_pdata) | |
96 | { | |
97 | } | |
98 | #endif | |
99 | ||
100 | #if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE) | |
7a559c78 | 101 | static struct omap_nand_platform_data nand_data; |
9a3f39ff MR |
102 | |
103 | void __init omap_nand_flash_init(int options, struct mtd_partition *parts, | |
104 | int nr_parts) | |
105 | { | |
106 | u8 cs = 0; | |
107 | u8 nandcs = GPMC_CS_NUM + 1; | |
108 | ||
109 | /* find out the chip-select on which NAND exists */ | |
110 | while (cs < GPMC_CS_NUM) { | |
111 | u32 ret = 0; | |
112 | ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); | |
113 | ||
114 | if ((ret & 0xC00) == 0x800) { | |
115 | printk(KERN_INFO "Found NAND on CS%d\n", cs); | |
116 | if (nandcs > GPMC_CS_NUM) | |
117 | nandcs = cs; | |
118 | } | |
119 | cs++; | |
120 | } | |
121 | ||
122 | if (nandcs > GPMC_CS_NUM) { | |
7852ec05 | 123 | pr_info("NAND: Unable to find configuration in GPMC\n"); |
9a3f39ff MR |
124 | return; |
125 | } | |
126 | ||
127 | if (nandcs < GPMC_CS_NUM) { | |
128 | nand_data.cs = nandcs; | |
129 | nand_data.parts = parts; | |
130 | nand_data.nr_parts = nr_parts; | |
7a559c78 | 131 | nand_data.devsize = options; |
9a3f39ff MR |
132 | |
133 | printk(KERN_INFO "Registering NAND on CS%d\n", nandcs); | |
134 | if (gpmc_nand_init(&nand_data) < 0) | |
135 | printk(KERN_ERR "Unable to register NAND device\n"); | |
136 | } | |
137 | } | |
138 | #else | |
139 | void __init omap_nand_flash_init(int options, struct mtd_partition *parts, | |
140 | int nr_parts) | |
141 | { | |
142 | } | |
143 | #endif |