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Merge branch 'drm-sti-next-add-dvo' of git://git.linaro.org/people/benjamin.gaignard...
[karo-tx-linux.git] / arch / arm / mach-omap2 / board-flash.c
1 /*
2  * board-flash.c
3  * Modified from mach-omap2/board-3430sdp-flash.c
4  *
5  * Copyright (C) 2009 Nokia Corporation
6  * Copyright (C) 2009 Texas Instruments
7  *
8  * Vimal Singh <vimalsingh@ti.com>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  */
14
15 #include <linux/kernel.h>
16 #include <linux/omap-gpmc.h>
17 #include <linux/platform_device.h>
18 #include <linux/mtd/physmap.h>
19 #include <linux/io.h>
20
21 #include <linux/platform_data/mtd-nand-omap2.h>
22 #include <linux/platform_data/mtd-onenand-omap2.h>
23
24 #include "soc.h"
25 #include "common.h"
26 #include "board-flash.h"
27
28 #define REG_FPGA_REV                    0x10
29 #define REG_FPGA_DIP_SWITCH_INPUT2      0x60
30 #define MAX_SUPPORTED_GPMC_CONFIG       3
31
32 #define DEBUG_BASE              0x08000000 /* debug board */
33
34 /* various memory sizes */
35 #define FLASH_SIZE_SDPV1        SZ_64M  /* NOR flash (64 Meg aligned) */
36 #define FLASH_SIZE_SDPV2        SZ_128M /* NOR flash (256 Meg aligned) */
37
38 static struct physmap_flash_data board_nor_data = {
39         .width          = 2,
40 };
41
42 static struct resource board_nor_resource = {
43         .flags          = IORESOURCE_MEM,
44 };
45
46 static struct platform_device board_nor_device = {
47         .name           = "physmap-flash",
48         .id             = 0,
49         .dev            = {
50                         .platform_data = &board_nor_data,
51         },
52         .num_resources  = 1,
53         .resource       = &board_nor_resource,
54 };
55
56 static void
57 __init board_nor_init(struct mtd_partition *nor_parts, u8 nr_parts, u8 cs)
58 {
59         int err;
60
61         board_nor_data.parts    = nor_parts;
62         board_nor_data.nr_parts = nr_parts;
63
64         /* Configure start address and size of NOR device */
65         if (omap_rev() >= OMAP3430_REV_ES1_0) {
66                 err = gpmc_cs_request(cs, FLASH_SIZE_SDPV2 - 1,
67                                 (unsigned long *)&board_nor_resource.start);
68                 board_nor_resource.end = board_nor_resource.start
69                                         + FLASH_SIZE_SDPV2 - 1;
70         } else {
71                 err = gpmc_cs_request(cs, FLASH_SIZE_SDPV1 - 1,
72                                 (unsigned long *)&board_nor_resource.start);
73                 board_nor_resource.end = board_nor_resource.start
74                                         + FLASH_SIZE_SDPV1 - 1;
75         }
76         if (err < 0) {
77                 pr_err("NOR: Can't request GPMC CS\n");
78                 return;
79         }
80         if (platform_device_register(&board_nor_device) < 0)
81                 pr_err("Unable to register NOR device\n");
82 }
83
84 #if defined(CONFIG_MTD_ONENAND_OMAP2) || \
85                 defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)
86 static struct omap_onenand_platform_data board_onenand_data = {
87         .dma_channel    = -1,   /* disable DMA in OMAP OneNAND driver */
88 };
89
90 void
91 __init board_onenand_init(struct mtd_partition *onenand_parts,
92                                 u8 nr_parts, u8 cs)
93 {
94         board_onenand_data.cs           = cs;
95         board_onenand_data.parts        = onenand_parts;
96         board_onenand_data.nr_parts     = nr_parts;
97
98         gpmc_onenand_init(&board_onenand_data);
99 }
100 #endif /* CONFIG_MTD_ONENAND_OMAP2 || CONFIG_MTD_ONENAND_OMAP2_MODULE */
101
102 #if defined(CONFIG_MTD_NAND_OMAP2) || \
103                 defined(CONFIG_MTD_NAND_OMAP2_MODULE)
104
105 /* Note that all values in this struct are in nanoseconds */
106 struct gpmc_timings nand_default_timings[1] = {
107         {
108                 .sync_clk = 0,
109
110                 .cs_on = 0,
111                 .cs_rd_off = 36,
112                 .cs_wr_off = 36,
113
114                 .we_on = 6,
115                 .oe_on = 6,
116
117                 .adv_on = 6,
118                 .adv_rd_off = 24,
119                 .adv_wr_off = 36,
120
121                 .we_off = 30,
122                 .oe_off = 48,
123
124                 .access = 54,
125                 .rd_cycle = 72,
126                 .wr_cycle = 72,
127
128                 .wr_access = 30,
129                 .wr_data_mux_bus = 0,
130         },
131 };
132
133 static struct omap_nand_platform_data board_nand_data;
134
135 void
136 __init board_nand_init(struct mtd_partition *nand_parts, u8 nr_parts, u8 cs,
137                                 int nand_type, struct gpmc_timings *gpmc_t)
138 {
139         board_nand_data.cs              = cs;
140         board_nand_data.parts           = nand_parts;
141         board_nand_data.nr_parts        = nr_parts;
142         board_nand_data.devsize         = nand_type;
143
144         board_nand_data.ecc_opt = OMAP_ECC_HAM1_CODE_SW;
145         gpmc_nand_init(&board_nand_data, gpmc_t);
146 }
147 #endif /* CONFIG_MTD_NAND_OMAP2 || CONFIG_MTD_NAND_OMAP2_MODULE */
148
149 /**
150  * get_gpmc0_type - Reads the FPGA DIP_SWITCH_INPUT_REGISTER2 to get
151  * the various cs values.
152  */
153 static u8 get_gpmc0_type(void)
154 {
155         u8 cs = 0;
156         void __iomem *fpga_map_addr;
157
158         fpga_map_addr = ioremap(DEBUG_BASE, 4096);
159         if (!fpga_map_addr)
160                 return -ENOMEM;
161
162         if (!(readw_relaxed(fpga_map_addr + REG_FPGA_REV)))
163                 /* we dont have an DEBUG FPGA??? */
164                 /* Depend on #defines!! default to strata boot return param */
165                 goto unmap;
166
167         /* S8-DIP-OFF = 1, S8-DIP-ON = 0 */
168         cs = readw_relaxed(fpga_map_addr + REG_FPGA_DIP_SWITCH_INPUT2) & 0xf;
169
170         /* ES2.0 SDP's onwards 4 dip switches are provided for CS */
171         if (omap_rev() >= OMAP3430_REV_ES1_0)
172                 /* change (S8-1:4=DS-2:0) to (S8-4:1=DS-2:0) */
173                 cs = ((cs & 8) >> 3) | ((cs & 4) >> 1) |
174                         ((cs & 2) << 1) | ((cs & 1) << 3);
175         else
176                 /* change (S8-1:3=DS-2:0) to (S8-3:1=DS-2:0) */
177                 cs = ((cs & 4) >> 2) | (cs & 2) | ((cs & 1) << 2);
178 unmap:
179         iounmap(fpga_map_addr);
180         return cs;
181 }
182
183 /**
184  * board_flash_init - Identify devices connected to GPMC and register.
185  *
186  * @return - void.
187  */
188 void __init board_flash_init(struct flash_partitions partition_info[],
189                         char chip_sel_board[][GPMC_CS_NUM], int nand_type)
190 {
191         u8              cs = 0;
192         u8              norcs = GPMC_CS_NUM + 1;
193         u8              nandcs = GPMC_CS_NUM + 1;
194         u8              onenandcs = GPMC_CS_NUM + 1;
195         u8              idx;
196         unsigned char   *config_sel = NULL;
197
198         /* REVISIT: Is this return correct idx for 2430 SDP?
199          * for which cs configuration matches for 2430 SDP?
200          */
201         idx = get_gpmc0_type();
202         if (idx >= MAX_SUPPORTED_GPMC_CONFIG) {
203                 pr_err("%s: Invalid chip select: %d\n", __func__, cs);
204                 return;
205         }
206         config_sel = (unsigned char *)(chip_sel_board[idx]);
207
208         while (cs < GPMC_CS_NUM) {
209                 switch (config_sel[cs]) {
210                 case PDC_NOR:
211                         if (norcs > GPMC_CS_NUM)
212                                 norcs = cs;
213                         break;
214                 case PDC_NAND:
215                         if (nandcs > GPMC_CS_NUM)
216                                 nandcs = cs;
217                         break;
218                 case PDC_ONENAND:
219                         if (onenandcs > GPMC_CS_NUM)
220                                 onenandcs = cs;
221                         break;
222                 }
223                 cs++;
224         }
225
226         if (norcs > GPMC_CS_NUM)
227                 pr_err("NOR: Unable to find configuration in GPMC\n");
228         else
229                 board_nor_init(partition_info[0].parts,
230                                 partition_info[0].nr_parts, norcs);
231
232         if (onenandcs > GPMC_CS_NUM)
233                 pr_err("OneNAND: Unable to find configuration in GPMC\n");
234         else
235                 board_onenand_init(partition_info[1].parts,
236                                         partition_info[1].nr_parts, onenandcs);
237
238         if (nandcs > GPMC_CS_NUM)
239                 pr_err("NAND: Unable to find configuration in GPMC\n");
240         else
241                 board_nand_init(partition_info[2].parts,
242                         partition_info[2].nr_parts, nandcs,
243                         nand_type, nand_default_timings);
244 }