1 /***************************************************************************
2 * Copyright (C) 2010 by Spencer Oliver *
3 * spen@spen-soft.co.uk *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
22 * NAND controller interface for Nuvoton NUC910
32 #include <target/arm.h>
34 struct nuc910_nand_controller {
35 struct arm_nand_data io;
38 static int validate_target_state(struct nand_device *nand)
40 struct target *target = nand->target;
42 if (target->state != TARGET_HALTED) {
43 LOG_ERROR("Target not halted");
44 return ERROR_NAND_OPERATION_FAILED;
50 static int nuc910_nand_command(struct nand_device *nand, uint8_t command)
52 struct target *target = nand->target;
55 result = validate_target_state(nand);
56 if (result != ERROR_OK)
59 target_write_u8(target, NUC910_SMCMD, command);
63 static int nuc910_nand_address(struct nand_device *nand, uint8_t address)
65 struct target *target = nand->target;
68 result = validate_target_state(nand);
69 if (result != ERROR_OK)
72 target_write_u32(target, NUC910_SMADDR, ((address & 0xff) | NUC910_SMADDR_EOA));
76 static int nuc910_nand_read(struct nand_device *nand, void *data)
78 struct target *target = nand->target;
81 result = validate_target_state(nand);
82 if (result != ERROR_OK)
85 target_read_u8(target, NUC910_SMDATA, data);
89 static int nuc910_nand_write(struct nand_device *nand, uint16_t data)
91 struct target *target = nand->target;
94 result = validate_target_state(nand);
95 if (result != ERROR_OK)
98 target_write_u8(target, NUC910_SMDATA, data);
102 static int nuc910_nand_read_block_data(struct nand_device *nand,
103 uint8_t *data, int data_size)
105 struct nuc910_nand_controller *nuc910_nand = nand->controller_priv;
108 result = validate_target_state(nand);
109 if (result != ERROR_OK)
112 nuc910_nand->io.chunk_size = nand->page_size;
114 /* try the fast way first */
115 result = arm_nandread(&nuc910_nand->io, data, data_size);
116 if (result != ERROR_NAND_NO_BUFFER)
119 /* else do it slowly */
121 nuc910_nand_read(nand, data++);
126 static int nuc910_nand_write_block_data(struct nand_device *nand,
127 uint8_t *data, int data_size)
129 struct nuc910_nand_controller *nuc910_nand = nand->controller_priv;
132 result = validate_target_state(nand);
133 if (result != ERROR_OK)
136 nuc910_nand->io.chunk_size = nand->page_size;
138 /* try the fast way first */
139 result = arm_nandwrite(&nuc910_nand->io, data, data_size);
140 if (result != ERROR_NAND_NO_BUFFER)
143 /* else do it slowly */
145 nuc910_nand_write(nand, *data++);
150 static int nuc910_nand_reset(struct nand_device *nand)
152 return nuc910_nand_command(nand, NAND_CMD_RESET);
155 static int nuc910_nand_ready(struct nand_device *nand, int timeout)
157 struct target *target = nand->target;
161 target_read_u32(target, NUC910_SMISR, &status);
162 if (status & NUC910_SMISR_RB_)
165 } while (timeout-- > 0);
170 NAND_DEVICE_COMMAND_HANDLER(nuc910_nand_device_command)
172 struct nuc910_nand_controller *nuc910_nand;
174 nuc910_nand = calloc(1, sizeof(struct nuc910_nand_controller));
176 LOG_ERROR("no memory for nand controller");
177 return ERROR_NAND_DEVICE_INVALID;
180 nand->controller_priv = nuc910_nand;
184 static int nuc910_nand_init(struct nand_device *nand)
186 struct nuc910_nand_controller *nuc910_nand = nand->controller_priv;
187 struct target *target = nand->target;
188 int bus_width = nand->bus_width ? : 8;
191 result = validate_target_state(nand);
192 if (result != ERROR_OK)
195 /* nuc910 only supports 8bit */
196 if (bus_width != 8) {
197 LOG_ERROR("nuc910 only supports 8 bit bus width, not %i", bus_width);
198 return ERROR_NAND_OPERATION_NOT_SUPPORTED;
201 /* inform calling code about selected bus width */
202 nand->bus_width = bus_width;
204 nuc910_nand->io.target = target;
205 nuc910_nand->io.data = NUC910_SMDATA;
206 nuc910_nand->io.op = ARM_NAND_NONE;
208 /* configure nand controller */
209 target_write_u32(target, NUC910_FMICSR, NUC910_FMICSR_SM_EN);
210 target_write_u32(target, NUC910_SMCSR, 0x010000a8); /* 2048 page size */
211 target_write_u32(target, NUC910_SMTCR, 0x00010204);
212 target_write_u32(target, NUC910_SMIER, 0x00000000);
217 struct nand_flash_controller nuc910_nand_controller = {
219 .command = nuc910_nand_command,
220 .address = nuc910_nand_address,
221 .read_data = nuc910_nand_read,
222 .write_data = nuc910_nand_write,
223 .write_block_data = nuc910_nand_write_block_data,
224 .read_block_data = nuc910_nand_read_block_data,
225 .nand_ready = nuc910_nand_ready,
226 .reset = nuc910_nand_reset,
227 .nand_device_command = nuc910_nand_device_command,
228 .init = nuc910_nand_init,