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
36 struct arm_nand_data io
;
39 static int validate_target_state(struct nand_device
*nand
)
41 struct target
*target
= nand
->target
;
43 if (target
->state
!= TARGET_HALTED
) {
44 LOG_ERROR("Target not halted");
45 return ERROR_NAND_OPERATION_FAILED
;
51 static int nuc910_nand_command(struct nand_device
*nand
, uint8_t command
)
53 struct target
*target
= nand
->target
;
56 if ((result
= validate_target_state(nand
)) != 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 if ((result
= validate_target_state(nand
)) != ERROR_OK
)
71 target_write_u32(target
, NUC910_SMADDR
, ((address
& 0xff) | NUC910_SMADDR_EOA
));
75 static int nuc910_nand_read(struct nand_device
*nand
, void *data
)
77 struct target
*target
= nand
->target
;
80 if ((result
= validate_target_state(nand
)) != ERROR_OK
)
83 target_read_u8(target
, NUC910_SMDATA
, data
);
87 static int nuc910_nand_write(struct nand_device
*nand
, uint16_t data
)
89 struct target
*target
= nand
->target
;
92 if ((result
= validate_target_state(nand
)) != ERROR_OK
)
95 target_write_u8(target
, NUC910_SMDATA
, data
);
99 static int nuc910_nand_read_block_data(struct nand_device
*nand
,
100 uint8_t *data
, int data_size
)
102 struct nuc910_nand_controller
*nuc910_nand
= nand
->controller_priv
;
105 if ((result
= validate_target_state(nand
)) != ERROR_OK
)
108 nuc910_nand
->io
.chunk_size
= nand
->page_size
;
110 /* try the fast way first */
111 result
= arm_nandread(&nuc910_nand
->io
, data
, data_size
);
112 if (result
!= ERROR_NAND_NO_BUFFER
)
115 /* else do it slowly */
117 nuc910_nand_read(nand
, data
++);
122 static int nuc910_nand_write_block_data(struct nand_device
*nand
,
123 uint8_t *data
, int data_size
)
125 struct nuc910_nand_controller
*nuc910_nand
= nand
->controller_priv
;
128 if ((result
= validate_target_state(nand
)) != ERROR_OK
)
131 nuc910_nand
->io
.chunk_size
= nand
->page_size
;
133 /* try the fast way first */
134 result
= arm_nandwrite(&nuc910_nand
->io
, data
, data_size
);
135 if (result
!= ERROR_NAND_NO_BUFFER
)
138 /* else do it slowly */
140 nuc910_nand_write(nand
, *data
++);
145 static int nuc910_nand_reset(struct nand_device
*nand
)
147 return nuc910_nand_command(nand
, NAND_CMD_RESET
);
150 static int nuc910_nand_ready(struct nand_device
*nand
, int timeout
)
152 struct target
*target
= nand
->target
;
156 target_read_u32(target
, NUC910_SMISR
, &status
);
157 if (status
& NUC910_SMISR_RB_
) {
161 } while (timeout
-- > 0);
166 NAND_DEVICE_COMMAND_HANDLER(nuc910_nand_device_command
)
168 struct nuc910_nand_controller
*nuc910_nand
;
170 nuc910_nand
= calloc(1, sizeof(struct nuc910_nand_controller
));
172 LOG_ERROR("no memory for nand controller");
173 return ERROR_NAND_DEVICE_INVALID
;
176 nand
->controller_priv
= nuc910_nand
;
180 static int nuc910_nand_init(struct nand_device
*nand
)
182 struct nuc910_nand_controller
*nuc910_nand
= nand
->controller_priv
;
183 struct target
*target
= nand
->target
;
184 int bus_width
= nand
->bus_width
? : 8;
187 if ((result
= validate_target_state(nand
)) != ERROR_OK
)
190 /* nuc910 only supports 8bit */
193 LOG_ERROR("nuc910 only supports 8 bit bus width, not %i", bus_width
);
194 return ERROR_NAND_OPERATION_NOT_SUPPORTED
;
197 /* inform calling code about selected bus width */
198 nand
->bus_width
= bus_width
;
200 nuc910_nand
->io
.target
= target
;
201 nuc910_nand
->io
.data
= NUC910_SMDATA
;
202 nuc910_nand
->io
.op
= ARM_NAND_NONE
;
204 /* configure nand controller */
205 target_write_u32(target
, NUC910_FMICSR
, NUC910_FMICSR_SM_EN
);
206 target_write_u32(target
, NUC910_SMCSR
, 0x010000a8); /* 2048 page size */
207 target_write_u32(target
, NUC910_SMTCR
, 0x00010204);
208 target_write_u32(target
, NUC910_SMIER
, 0x00000000);
213 struct nand_flash_controller nuc910_nand_controller
=
216 .command
= nuc910_nand_command
,
217 .address
= nuc910_nand_address
,
218 .read_data
= nuc910_nand_read
,
219 .write_data
= nuc910_nand_write
,
220 .write_block_data
= nuc910_nand_write_block_data
,
221 .read_block_data
= nuc910_nand_read_block_data
,
222 .nand_ready
= nuc910_nand_ready
,
223 .reset
= nuc910_nand_reset
,
224 .nand_device_command
= nuc910_nand_device_command
,
225 .init
= nuc910_nand_init
,
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