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
board_nor_init(struct mtd_partition * nor_parts,u8 nr_parts,u8 cs)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
board_onenand_init(struct mtd_partition * onenand_parts,u8 nr_parts,u8 cs)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
board_nand_init(struct mtd_partition * nand_parts,u8 nr_parts,u8 cs,int nand_type,struct gpmc_timings * gpmc_t)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 */
get_gpmc0_type(void)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 */
board_flash_init(struct flash_partitions partition_info[],char chip_sel_board[][GPMC_CS_NUM],int nand_type)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 }
245