Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. |
| 3 | * Copyright 2008 Sascha Hauer, kernel@pengutronix.de |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version 2 |
| 8 | * of the License, or (at your option) any later version. |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 17 | * MA 02110-1301, USA. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/mtd/mtd.h> |
| 25 | #include <linux/mtd/nand.h> |
| 26 | #include <linux/mtd/partitions.h> |
| 27 | #include <linux/interrupt.h> |
| 28 | #include <linux/device.h> |
| 29 | #include <linux/platform_device.h> |
| 30 | #include <linux/clk.h> |
| 31 | #include <linux/err.h> |
| 32 | #include <linux/io.h> |
| 33 | |
| 34 | #include <asm/mach/flash.h> |
| 35 | #include <mach/mxc_nand.h> |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 36 | #include <mach/hardware.h> |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 37 | |
| 38 | #define DRIVER_NAME "mxc_nand" |
| 39 | |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 40 | #define nfc_is_v21() (cpu_is_mx25() || cpu_is_mx35()) |
Ivo Clarysse | a47bfd2 | 2010-04-08 16:16:51 +0200 | [diff] [blame] | 41 | #define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21()) |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 42 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 43 | /* Addresses for NFC registers */ |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 44 | #define NFC_V1_V2_BUF_SIZE (host->regs + 0x00) |
| 45 | #define NFC_V1_V2_BUF_ADDR (host->regs + 0x04) |
| 46 | #define NFC_V1_V2_FLASH_ADDR (host->regs + 0x06) |
| 47 | #define NFC_V1_V2_FLASH_CMD (host->regs + 0x08) |
| 48 | #define NFC_V1_V2_CONFIG (host->regs + 0x0a) |
| 49 | #define NFC_V1_V2_ECC_STATUS_RESULT (host->regs + 0x0c) |
| 50 | #define NFC_V1_V2_RSLTMAIN_AREA (host->regs + 0x0e) |
| 51 | #define NFC_V1_V2_RSLTSPARE_AREA (host->regs + 0x10) |
| 52 | #define NFC_V1_V2_WRPROT (host->regs + 0x12) |
| 53 | #define NFC_V1_UNLOCKSTART_BLKADDR (host->regs + 0x14) |
| 54 | #define NFC_V1_UNLOCKEND_BLKADDR (host->regs + 0x16) |
| 55 | #define NFC_V21_UNLOCKSTART_BLKADDR (host->regs + 0x20) |
| 56 | #define NFC_V21_UNLOCKEND_BLKADDR (host->regs + 0x22) |
| 57 | #define NFC_V1_V2_NF_WRPRST (host->regs + 0x18) |
| 58 | #define NFC_V1_V2_CONFIG1 (host->regs + 0x1a) |
| 59 | #define NFC_V1_V2_CONFIG2 (host->regs + 0x1c) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 60 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 61 | #define NFC_V1_V2_CONFIG1_SP_EN (1 << 2) |
| 62 | #define NFC_V1_V2_CONFIG1_ECC_EN (1 << 3) |
| 63 | #define NFC_V1_V2_CONFIG1_INT_MSK (1 << 4) |
| 64 | #define NFC_V1_V2_CONFIG1_BIG (1 << 5) |
| 65 | #define NFC_V1_V2_CONFIG1_RST (1 << 6) |
| 66 | #define NFC_V1_V2_CONFIG1_CE (1 << 7) |
| 67 | #define NFC_V1_V2_CONFIG1_ONE_CYCLE (1 << 8) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 68 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 69 | #define NFC_V1_V2_CONFIG2_INT (1 << 15) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 70 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 71 | /* |
| 72 | * Operation modes for the NFC. Valid for v1, v2 and v3 |
| 73 | * type controllers. |
| 74 | */ |
| 75 | #define NFC_CMD (1 << 0) |
| 76 | #define NFC_ADDR (1 << 1) |
| 77 | #define NFC_INPUT (1 << 2) |
| 78 | #define NFC_OUTPUT (1 << 3) |
| 79 | #define NFC_ID (1 << 4) |
| 80 | #define NFC_STATUS (1 << 5) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 81 | |
| 82 | struct mxc_nand_host { |
| 83 | struct mtd_info mtd; |
| 84 | struct nand_chip nand; |
| 85 | struct mtd_partition *parts; |
| 86 | struct device *dev; |
| 87 | |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 88 | void *spare0; |
| 89 | void *main_area0; |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 90 | |
| 91 | void __iomem *base; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 92 | void __iomem *regs; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 93 | int status_request; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 94 | struct clk *clk; |
| 95 | int clk_act; |
| 96 | int irq; |
Sascha Hauer | 94f77e5 | 2010-08-06 15:53:09 +0200 | [diff] [blame^] | 97 | int eccsize; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 98 | |
| 99 | wait_queue_head_t irq_waitq; |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 100 | |
| 101 | uint8_t *data_buf; |
| 102 | unsigned int buf_start; |
| 103 | int spare_len; |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 104 | |
| 105 | void (*preset)(struct mtd_info *); |
| 106 | void (*send_cmd)(struct mxc_nand_host *, uint16_t, int); |
| 107 | void (*send_addr)(struct mxc_nand_host *, uint16_t, int); |
| 108 | void (*send_page)(struct mtd_info *, unsigned int); |
| 109 | void (*send_read_id)(struct mxc_nand_host *); |
| 110 | uint16_t (*get_dev_status)(struct mxc_nand_host *); |
Sascha Hauer | 7aaf28a | 2010-08-06 15:53:07 +0200 | [diff] [blame] | 111 | int (*check_int)(struct mxc_nand_host *); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 112 | }; |
| 113 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 114 | /* OOB placement block for use with hardware ecc generation */ |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 115 | static struct nand_ecclayout nandv1_hw_eccoob_smallpage = { |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 116 | .eccbytes = 5, |
| 117 | .eccpos = {6, 7, 8, 9, 10}, |
Sascha Hauer | 8c1fd89 | 2009-10-21 10:22:01 +0200 | [diff] [blame] | 118 | .oobfree = {{0, 5}, {12, 4}, } |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 119 | }; |
| 120 | |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 121 | static struct nand_ecclayout nandv1_hw_eccoob_largepage = { |
Vladimir Barinov | bd3fd62 | 2009-05-25 13:06:17 +0400 | [diff] [blame] | 122 | .eccbytes = 20, |
| 123 | .eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26, |
| 124 | 38, 39, 40, 41, 42, 54, 55, 56, 57, 58}, |
| 125 | .oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, } |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 126 | }; |
| 127 | |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 128 | /* OOB description for 512 byte pages with 16 byte OOB */ |
| 129 | static struct nand_ecclayout nandv2_hw_eccoob_smallpage = { |
| 130 | .eccbytes = 1 * 9, |
| 131 | .eccpos = { |
| 132 | 7, 8, 9, 10, 11, 12, 13, 14, 15 |
| 133 | }, |
| 134 | .oobfree = { |
| 135 | {.offset = 0, .length = 5} |
| 136 | } |
| 137 | }; |
| 138 | |
| 139 | /* OOB description for 2048 byte pages with 64 byte OOB */ |
| 140 | static struct nand_ecclayout nandv2_hw_eccoob_largepage = { |
| 141 | .eccbytes = 4 * 9, |
| 142 | .eccpos = { |
| 143 | 7, 8, 9, 10, 11, 12, 13, 14, 15, |
| 144 | 23, 24, 25, 26, 27, 28, 29, 30, 31, |
| 145 | 39, 40, 41, 42, 43, 44, 45, 46, 47, |
| 146 | 55, 56, 57, 58, 59, 60, 61, 62, 63 |
| 147 | }, |
| 148 | .oobfree = { |
| 149 | {.offset = 2, .length = 4}, |
| 150 | {.offset = 16, .length = 7}, |
| 151 | {.offset = 32, .length = 7}, |
| 152 | {.offset = 48, .length = 7} |
| 153 | } |
| 154 | }; |
| 155 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 156 | #ifdef CONFIG_MTD_PARTITIONS |
| 157 | static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL }; |
| 158 | #endif |
| 159 | |
| 160 | static irqreturn_t mxc_nfc_irq(int irq, void *dev_id) |
| 161 | { |
| 162 | struct mxc_nand_host *host = dev_id; |
| 163 | |
Ivo Clarysse | a47bfd2 | 2010-04-08 16:16:51 +0200 | [diff] [blame] | 164 | disable_irq_nosync(irq); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 165 | |
| 166 | wake_up(&host->irq_waitq); |
| 167 | |
| 168 | return IRQ_HANDLED; |
| 169 | } |
| 170 | |
Sascha Hauer | 7aaf28a | 2010-08-06 15:53:07 +0200 | [diff] [blame] | 171 | static int check_int_v1_v2(struct mxc_nand_host *host) |
| 172 | { |
| 173 | uint32_t tmp; |
| 174 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 175 | tmp = readw(NFC_V1_V2_CONFIG2); |
| 176 | if (!(tmp & NFC_V1_V2_CONFIG2_INT)) |
Sascha Hauer | 7aaf28a | 2010-08-06 15:53:07 +0200 | [diff] [blame] | 177 | return 0; |
| 178 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 179 | writew(tmp & ~NFC_V1_V2_CONFIG2_INT, NFC_V1_V2_CONFIG2); |
Sascha Hauer | 7aaf28a | 2010-08-06 15:53:07 +0200 | [diff] [blame] | 180 | |
| 181 | return 1; |
| 182 | } |
| 183 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 184 | /* This function polls the NANDFC to wait for the basic operation to |
| 185 | * complete by checking the INT bit of config2 register. |
| 186 | */ |
Sascha Hauer | c110eaf | 2009-10-21 16:01:02 +0200 | [diff] [blame] | 187 | static void wait_op_done(struct mxc_nand_host *host, int useirq) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 188 | { |
Ivo Clarysse | a47bfd2 | 2010-04-08 16:16:51 +0200 | [diff] [blame] | 189 | int max_retries = 8000; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 190 | |
| 191 | if (useirq) { |
Sascha Hauer | 7aaf28a | 2010-08-06 15:53:07 +0200 | [diff] [blame] | 192 | if (!host->check_int(host)) { |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 193 | |
Ivo Clarysse | a47bfd2 | 2010-04-08 16:16:51 +0200 | [diff] [blame] | 194 | enable_irq(host->irq); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 195 | |
Sascha Hauer | 7aaf28a | 2010-08-06 15:53:07 +0200 | [diff] [blame] | 196 | wait_event(host->irq_waitq, host->check_int(host)); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 197 | } |
| 198 | } else { |
| 199 | while (max_retries-- > 0) { |
Sascha Hauer | 7aaf28a | 2010-08-06 15:53:07 +0200 | [diff] [blame] | 200 | if (host->check_int(host)) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 201 | break; |
Sascha Hauer | 7aaf28a | 2010-08-06 15:53:07 +0200 | [diff] [blame] | 202 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 203 | udelay(1); |
| 204 | } |
Roel Kluin | 43950a6 | 2009-06-04 16:24:59 +0200 | [diff] [blame] | 205 | if (max_retries < 0) |
Sascha Hauer | 6246549 | 2009-06-04 15:57:20 +0200 | [diff] [blame] | 206 | DEBUG(MTD_DEBUG_LEVEL0, "%s: INT not set\n", |
| 207 | __func__); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 208 | } |
| 209 | } |
| 210 | |
| 211 | /* This function issues the specified command to the NAND device and |
| 212 | * waits for completion. */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 213 | static void send_cmd_v1_v2(struct mxc_nand_host *host, uint16_t cmd, int useirq) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 214 | { |
| 215 | DEBUG(MTD_DEBUG_LEVEL3, "send_cmd(host, 0x%x, %d)\n", cmd, useirq); |
| 216 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 217 | writew(cmd, NFC_V1_V2_FLASH_CMD); |
| 218 | writew(NFC_CMD, NFC_V1_V2_CONFIG2); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 219 | |
Ivo Clarysse | a47bfd2 | 2010-04-08 16:16:51 +0200 | [diff] [blame] | 220 | if (cpu_is_mx21() && (cmd == NAND_CMD_RESET)) { |
| 221 | int max_retries = 100; |
| 222 | /* Reset completion is indicated by NFC_CONFIG2 */ |
| 223 | /* being set to 0 */ |
| 224 | while (max_retries-- > 0) { |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 225 | if (readw(NFC_V1_V2_CONFIG2) == 0) { |
Ivo Clarysse | a47bfd2 | 2010-04-08 16:16:51 +0200 | [diff] [blame] | 226 | break; |
| 227 | } |
| 228 | udelay(1); |
| 229 | } |
| 230 | if (max_retries < 0) |
| 231 | DEBUG(MTD_DEBUG_LEVEL0, "%s: RESET failed\n", |
| 232 | __func__); |
| 233 | } else { |
| 234 | /* Wait for operation to complete */ |
| 235 | wait_op_done(host, useirq); |
| 236 | } |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 237 | } |
| 238 | |
| 239 | /* This function sends an address (or partial address) to the |
| 240 | * NAND device. The address is used to select the source/destination for |
| 241 | * a NAND command. */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 242 | static void send_addr_v1_v2(struct mxc_nand_host *host, uint16_t addr, int islast) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 243 | { |
| 244 | DEBUG(MTD_DEBUG_LEVEL3, "send_addr(host, 0x%x %d)\n", addr, islast); |
| 245 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 246 | writew(addr, NFC_V1_V2_FLASH_ADDR); |
| 247 | writew(NFC_ADDR, NFC_V1_V2_CONFIG2); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 248 | |
| 249 | /* Wait for operation to complete */ |
Sascha Hauer | c110eaf | 2009-10-21 16:01:02 +0200 | [diff] [blame] | 250 | wait_op_done(host, islast); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 251 | } |
| 252 | |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 253 | static void send_page_v1_v2(struct mtd_info *mtd, unsigned int ops) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 254 | { |
Sascha Hauer | 2d69c7f | 2009-10-05 11:24:02 +0200 | [diff] [blame] | 255 | struct nand_chip *nand_chip = mtd->priv; |
| 256 | struct mxc_nand_host *host = nand_chip->priv; |
Sascha Hauer | c5d23f1 | 2009-06-04 17:25:53 +0200 | [diff] [blame] | 257 | int bufs, i; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 258 | |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 259 | if (nfc_is_v1() && mtd->writesize > 512) |
Sascha Hauer | c5d23f1 | 2009-06-04 17:25:53 +0200 | [diff] [blame] | 260 | bufs = 4; |
| 261 | else |
| 262 | bufs = 1; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 263 | |
Sascha Hauer | c5d23f1 | 2009-06-04 17:25:53 +0200 | [diff] [blame] | 264 | for (i = 0; i < bufs; i++) { |
| 265 | |
| 266 | /* NANDFC buffer 0 is used for page read/write */ |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 267 | writew(i, NFC_V1_V2_BUF_ADDR); |
Sascha Hauer | c5d23f1 | 2009-06-04 17:25:53 +0200 | [diff] [blame] | 268 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 269 | writew(ops, NFC_V1_V2_CONFIG2); |
Sascha Hauer | c5d23f1 | 2009-06-04 17:25:53 +0200 | [diff] [blame] | 270 | |
| 271 | /* Wait for operation to complete */ |
Sascha Hauer | c110eaf | 2009-10-21 16:01:02 +0200 | [diff] [blame] | 272 | wait_op_done(host, true); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 273 | } |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | /* Request the NANDFC to perform a read of the NAND device ID. */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 277 | static void send_read_id_v1_v2(struct mxc_nand_host *host) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 278 | { |
| 279 | struct nand_chip *this = &host->nand; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 280 | |
| 281 | /* NANDFC buffer 0 is used for device ID output */ |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 282 | writew(0x0, NFC_V1_V2_BUF_ADDR); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 283 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 284 | writew(NFC_ID, NFC_V1_V2_CONFIG2); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 285 | |
| 286 | /* Wait for operation to complete */ |
Sascha Hauer | c110eaf | 2009-10-21 16:01:02 +0200 | [diff] [blame] | 287 | wait_op_done(host, true); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 288 | |
| 289 | if (this->options & NAND_BUSWIDTH_16) { |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 290 | void __iomem *main_buf = host->main_area0; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 291 | /* compress the ID info */ |
| 292 | writeb(readb(main_buf + 2), main_buf + 1); |
| 293 | writeb(readb(main_buf + 4), main_buf + 2); |
| 294 | writeb(readb(main_buf + 6), main_buf + 3); |
| 295 | writeb(readb(main_buf + 8), main_buf + 4); |
| 296 | writeb(readb(main_buf + 10), main_buf + 5); |
| 297 | } |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 298 | memcpy(host->data_buf, host->main_area0, 16); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | /* This function requests the NANDFC to perform a read of the |
| 302 | * NAND device status and returns the current status. */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 303 | static uint16_t get_dev_status_v1_v2(struct mxc_nand_host *host) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 304 | { |
Sascha Hauer | c29c607 | 2010-08-06 15:53:05 +0200 | [diff] [blame] | 305 | void __iomem *main_buf = host->main_area0; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 306 | uint32_t store; |
Sascha Hauer | f06368f | 2009-10-05 17:18:42 +0200 | [diff] [blame] | 307 | uint16_t ret; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 308 | |
Sascha Hauer | c29c607 | 2010-08-06 15:53:05 +0200 | [diff] [blame] | 309 | writew(0x0, NFC_V1_V2_BUF_ADDR); |
| 310 | |
| 311 | /* |
| 312 | * The device status is stored in main_area0. To |
| 313 | * prevent corruption of the buffer save the value |
| 314 | * and restore it afterwards. |
| 315 | */ |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 316 | store = readl(main_buf); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 317 | |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 318 | writew(NFC_STATUS, NFC_V1_V2_CONFIG2); |
Sascha Hauer | c110eaf | 2009-10-21 16:01:02 +0200 | [diff] [blame] | 319 | wait_op_done(host, true); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 320 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 321 | ret = readw(main_buf); |
Sascha Hauer | c29c607 | 2010-08-06 15:53:05 +0200 | [diff] [blame] | 322 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 323 | writel(store, main_buf); |
| 324 | |
| 325 | return ret; |
| 326 | } |
| 327 | |
| 328 | /* This functions is used by upper layer to checks if device is ready */ |
| 329 | static int mxc_nand_dev_ready(struct mtd_info *mtd) |
| 330 | { |
| 331 | /* |
| 332 | * NFC handles R/B internally. Therefore, this function |
| 333 | * always returns status as ready. |
| 334 | */ |
| 335 | return 1; |
| 336 | } |
| 337 | |
| 338 | static void mxc_nand_enable_hwecc(struct mtd_info *mtd, int mode) |
| 339 | { |
| 340 | /* |
| 341 | * If HW ECC is enabled, we turn it on during init. There is |
| 342 | * no need to enable again here. |
| 343 | */ |
| 344 | } |
| 345 | |
Sascha Hauer | 94f77e5 | 2010-08-06 15:53:09 +0200 | [diff] [blame^] | 346 | static int mxc_nand_correct_data_v1(struct mtd_info *mtd, u_char *dat, |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 347 | u_char *read_ecc, u_char *calc_ecc) |
| 348 | { |
| 349 | struct nand_chip *nand_chip = mtd->priv; |
| 350 | struct mxc_nand_host *host = nand_chip->priv; |
| 351 | |
| 352 | /* |
| 353 | * 1-Bit errors are automatically corrected in HW. No need for |
| 354 | * additional correction. 2-Bit errors cannot be corrected by |
| 355 | * HW ECC, so we need to return failure |
| 356 | */ |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 357 | uint16_t ecc_status = readw(NFC_V1_V2_ECC_STATUS_RESULT); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 358 | |
| 359 | if (((ecc_status & 0x3) == 2) || ((ecc_status >> 2) == 2)) { |
| 360 | DEBUG(MTD_DEBUG_LEVEL0, |
| 361 | "MXC_NAND: HWECC uncorrectable 2-bit ECC error\n"); |
| 362 | return -1; |
| 363 | } |
| 364 | |
| 365 | return 0; |
| 366 | } |
| 367 | |
Sascha Hauer | 94f77e5 | 2010-08-06 15:53:09 +0200 | [diff] [blame^] | 368 | static int mxc_nand_correct_data_v2_v3(struct mtd_info *mtd, u_char *dat, |
| 369 | u_char *read_ecc, u_char *calc_ecc) |
| 370 | { |
| 371 | struct nand_chip *nand_chip = mtd->priv; |
| 372 | struct mxc_nand_host *host = nand_chip->priv; |
| 373 | u32 ecc_stat, err; |
| 374 | int no_subpages = 1; |
| 375 | int ret = 0; |
| 376 | u8 ecc_bit_mask, err_limit; |
| 377 | |
| 378 | ecc_bit_mask = (host->eccsize == 4) ? 0x7 : 0xf; |
| 379 | err_limit = (host->eccsize == 4) ? 0x4 : 0x8; |
| 380 | |
| 381 | no_subpages = mtd->writesize >> 9; |
| 382 | |
| 383 | ecc_stat = readl(NFC_V1_V2_ECC_STATUS_RESULT); |
| 384 | |
| 385 | do { |
| 386 | err = ecc_stat & ecc_bit_mask; |
| 387 | if (err > err_limit) { |
| 388 | printk(KERN_WARNING "UnCorrectable RS-ECC Error\n"); |
| 389 | return -1; |
| 390 | } else { |
| 391 | ret += err; |
| 392 | } |
| 393 | ecc_stat >>= 4; |
| 394 | } while (--no_subpages); |
| 395 | |
| 396 | mtd->ecc_stats.corrected += ret; |
| 397 | pr_debug("%d Symbol Correctable RS-ECC Error\n", ret); |
| 398 | |
| 399 | return ret; |
| 400 | } |
| 401 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 402 | static int mxc_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, |
| 403 | u_char *ecc_code) |
| 404 | { |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | static u_char mxc_nand_read_byte(struct mtd_info *mtd) |
| 409 | { |
| 410 | struct nand_chip *nand_chip = mtd->priv; |
| 411 | struct mxc_nand_host *host = nand_chip->priv; |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 412 | uint8_t ret; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 413 | |
| 414 | /* Check for status request */ |
| 415 | if (host->status_request) |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 416 | return host->get_dev_status(host) & 0xFF; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 417 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 418 | ret = *(uint8_t *)(host->data_buf + host->buf_start); |
| 419 | host->buf_start++; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 420 | |
| 421 | return ret; |
| 422 | } |
| 423 | |
| 424 | static uint16_t mxc_nand_read_word(struct mtd_info *mtd) |
| 425 | { |
| 426 | struct nand_chip *nand_chip = mtd->priv; |
| 427 | struct mxc_nand_host *host = nand_chip->priv; |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 428 | uint16_t ret; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 429 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 430 | ret = *(uint16_t *)(host->data_buf + host->buf_start); |
| 431 | host->buf_start += 2; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 432 | |
| 433 | return ret; |
| 434 | } |
| 435 | |
| 436 | /* Write data of length len to buffer buf. The data to be |
| 437 | * written on NAND Flash is first copied to RAMbuffer. After the Data Input |
| 438 | * Operation by the NFC, the data is written to NAND Flash */ |
| 439 | static void mxc_nand_write_buf(struct mtd_info *mtd, |
| 440 | const u_char *buf, int len) |
| 441 | { |
| 442 | struct nand_chip *nand_chip = mtd->priv; |
| 443 | struct mxc_nand_host *host = nand_chip->priv; |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 444 | u16 col = host->buf_start; |
| 445 | int n = mtd->oobsize + mtd->writesize - col; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 446 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 447 | n = min(n, len); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 448 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 449 | memcpy(host->data_buf + col, buf, n); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 450 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 451 | host->buf_start += n; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | /* Read the data buffer from the NAND Flash. To read the data from NAND |
| 455 | * Flash first the data output cycle is initiated by the NFC, which copies |
| 456 | * the data to RAMbuffer. This data of length len is then copied to buffer buf. |
| 457 | */ |
| 458 | static void mxc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) |
| 459 | { |
| 460 | struct nand_chip *nand_chip = mtd->priv; |
| 461 | struct mxc_nand_host *host = nand_chip->priv; |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 462 | u16 col = host->buf_start; |
| 463 | int n = mtd->oobsize + mtd->writesize - col; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 464 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 465 | n = min(n, len); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 466 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 467 | memcpy(buf, host->data_buf + col, len); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 468 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 469 | host->buf_start += len; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | /* Used by the upper layer to verify the data in NAND Flash |
| 473 | * with the data in the buf. */ |
| 474 | static int mxc_nand_verify_buf(struct mtd_info *mtd, |
| 475 | const u_char *buf, int len) |
| 476 | { |
| 477 | return -EFAULT; |
| 478 | } |
| 479 | |
| 480 | /* This function is used by upper layer for select and |
| 481 | * deselect of the NAND chip */ |
| 482 | static void mxc_nand_select_chip(struct mtd_info *mtd, int chip) |
| 483 | { |
| 484 | struct nand_chip *nand_chip = mtd->priv; |
| 485 | struct mxc_nand_host *host = nand_chip->priv; |
| 486 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 487 | switch (chip) { |
| 488 | case -1: |
| 489 | /* Disable the NFC clock */ |
| 490 | if (host->clk_act) { |
| 491 | clk_disable(host->clk); |
| 492 | host->clk_act = 0; |
| 493 | } |
| 494 | break; |
| 495 | case 0: |
| 496 | /* Enable the NFC clock */ |
| 497 | if (!host->clk_act) { |
| 498 | clk_enable(host->clk); |
| 499 | host->clk_act = 1; |
| 500 | } |
| 501 | break; |
| 502 | |
| 503 | default: |
| 504 | break; |
| 505 | } |
| 506 | } |
| 507 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 508 | /* |
| 509 | * Function to transfer data to/from spare area. |
| 510 | */ |
| 511 | static void copy_spare(struct mtd_info *mtd, bool bfrom) |
| 512 | { |
| 513 | struct nand_chip *this = mtd->priv; |
| 514 | struct mxc_nand_host *host = this->priv; |
| 515 | u16 i, j; |
| 516 | u16 n = mtd->writesize >> 9; |
| 517 | u8 *d = host->data_buf + mtd->writesize; |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 518 | u8 *s = host->spare0; |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 519 | u16 t = host->spare_len; |
| 520 | |
| 521 | j = (mtd->oobsize / n >> 1) << 1; |
| 522 | |
| 523 | if (bfrom) { |
| 524 | for (i = 0; i < n - 1; i++) |
| 525 | memcpy(d + i * j, s + i * t, j); |
| 526 | |
| 527 | /* the last section */ |
| 528 | memcpy(d + i * j, s + i * t, mtd->oobsize - i * j); |
| 529 | } else { |
| 530 | for (i = 0; i < n - 1; i++) |
| 531 | memcpy(&s[i * t], &d[i * j], j); |
| 532 | |
| 533 | /* the last section */ |
| 534 | memcpy(&s[i * t], &d[i * j], mtd->oobsize - i * j); |
| 535 | } |
| 536 | } |
| 537 | |
Sascha Hauer | a3e65b6 | 2009-06-02 11:47:59 +0200 | [diff] [blame] | 538 | static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 539 | { |
| 540 | struct nand_chip *nand_chip = mtd->priv; |
| 541 | struct mxc_nand_host *host = nand_chip->priv; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 542 | |
| 543 | /* Write out column address, if necessary */ |
| 544 | if (column != -1) { |
| 545 | /* |
| 546 | * MXC NANDFC can only perform full page+spare or |
| 547 | * spare-only read/write. When the upper layers |
| 548 | * layers perform a read/write buf operation, |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 549 | * we will used the saved column address to index into |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 550 | * the full page. |
| 551 | */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 552 | host->send_addr(host, 0, page_addr == -1); |
Sascha Hauer | 2d69c7f | 2009-10-05 11:24:02 +0200 | [diff] [blame] | 553 | if (mtd->writesize > 512) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 554 | /* another col addr cycle for 2k page */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 555 | host->send_addr(host, 0, false); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | /* Write out page address, if necessary */ |
| 559 | if (page_addr != -1) { |
| 560 | /* paddr_0 - p_addr_7 */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 561 | host->send_addr(host, (page_addr & 0xff), false); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 562 | |
Sascha Hauer | 2d69c7f | 2009-10-05 11:24:02 +0200 | [diff] [blame] | 563 | if (mtd->writesize > 512) { |
Vladimir Barinov | bd3fd62 | 2009-05-25 13:06:17 +0400 | [diff] [blame] | 564 | if (mtd->size >= 0x10000000) { |
| 565 | /* paddr_8 - paddr_15 */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 566 | host->send_addr(host, (page_addr >> 8) & 0xff, false); |
| 567 | host->send_addr(host, (page_addr >> 16) & 0xff, true); |
Vladimir Barinov | bd3fd62 | 2009-05-25 13:06:17 +0400 | [diff] [blame] | 568 | } else |
| 569 | /* paddr_8 - paddr_15 */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 570 | host->send_addr(host, (page_addr >> 8) & 0xff, true); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 571 | } else { |
| 572 | /* One more address cycle for higher density devices */ |
| 573 | if (mtd->size >= 0x4000000) { |
| 574 | /* paddr_8 - paddr_15 */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 575 | host->send_addr(host, (page_addr >> 8) & 0xff, false); |
| 576 | host->send_addr(host, (page_addr >> 16) & 0xff, true); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 577 | } else |
| 578 | /* paddr_8 - paddr_15 */ |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 579 | host->send_addr(host, (page_addr >> 8) & 0xff, true); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 580 | } |
| 581 | } |
Sascha Hauer | a3e65b6 | 2009-06-02 11:47:59 +0200 | [diff] [blame] | 582 | } |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 583 | |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 584 | static void preset_v1_v2(struct mtd_info *mtd) |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 585 | { |
| 586 | struct nand_chip *nand_chip = mtd->priv; |
| 587 | struct mxc_nand_host *host = nand_chip->priv; |
| 588 | uint16_t tmp; |
| 589 | |
Ivo Clarysse | a47bfd2 | 2010-04-08 16:16:51 +0200 | [diff] [blame] | 590 | /* enable interrupt, disable spare enable */ |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 591 | tmp = readw(NFC_V1_V2_CONFIG1); |
| 592 | tmp &= ~NFC_V1_V2_CONFIG1_INT_MSK; |
| 593 | tmp &= ~NFC_V1_V2_CONFIG1_SP_EN; |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 594 | if (nand_chip->ecc.mode == NAND_ECC_HW) { |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 595 | tmp |= NFC_V1_V2_CONFIG1_ECC_EN; |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 596 | } else { |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 597 | tmp &= ~NFC_V1_V2_CONFIG1_ECC_EN; |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 598 | } |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 599 | writew(tmp, NFC_V1_V2_CONFIG1); |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 600 | /* preset operation */ |
| 601 | |
| 602 | /* Unlock the internal RAM Buffer */ |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 603 | writew(0x2, NFC_V1_V2_CONFIG); |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 604 | |
| 605 | /* Blocks to be unlocked */ |
| 606 | if (nfc_is_v21()) { |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 607 | writew(0x0, NFC_V21_UNLOCKSTART_BLKADDR); |
| 608 | writew(0xffff, NFC_V21_UNLOCKEND_BLKADDR); |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 609 | } else if (nfc_is_v1()) { |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 610 | writew(0x0, NFC_V1_UNLOCKSTART_BLKADDR); |
| 611 | writew(0x4000, NFC_V1_UNLOCKEND_BLKADDR); |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 612 | } else |
| 613 | BUG(); |
| 614 | |
| 615 | /* Unlock Block Command for given address range */ |
Sascha Hauer | 1bc9918 | 2010-08-06 15:53:08 +0200 | [diff] [blame] | 616 | writew(0x4, NFC_V1_V2_WRPROT); |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 617 | } |
| 618 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 619 | /* Used by the upper layer to write command to NAND Flash for |
| 620 | * different operations to be carried out on NAND Flash */ |
| 621 | static void mxc_nand_command(struct mtd_info *mtd, unsigned command, |
| 622 | int column, int page_addr) |
| 623 | { |
| 624 | struct nand_chip *nand_chip = mtd->priv; |
| 625 | struct mxc_nand_host *host = nand_chip->priv; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 626 | |
| 627 | DEBUG(MTD_DEBUG_LEVEL3, |
| 628 | "mxc_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n", |
| 629 | command, column, page_addr); |
| 630 | |
| 631 | /* Reset command state information */ |
| 632 | host->status_request = false; |
| 633 | |
| 634 | /* Command pre-processing step */ |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 635 | switch (command) { |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 636 | case NAND_CMD_RESET: |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 637 | host->preset(mtd); |
| 638 | host->send_cmd(host, command, false); |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 639 | break; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 640 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 641 | case NAND_CMD_STATUS: |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 642 | host->buf_start = 0; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 643 | host->status_request = true; |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 644 | |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 645 | host->send_cmd(host, command, true); |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 646 | mxc_do_addr_cycle(mtd, column, page_addr); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 647 | break; |
| 648 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 649 | case NAND_CMD_READ0: |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 650 | case NAND_CMD_READOOB: |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 651 | if (command == NAND_CMD_READ0) |
| 652 | host->buf_start = column; |
| 653 | else |
| 654 | host->buf_start = column + mtd->writesize; |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 655 | |
Sascha Hauer | 6c49939 | 2010-05-28 10:02:17 +0200 | [diff] [blame] | 656 | command = NAND_CMD_READ0; /* only READ0 is valid */ |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 657 | |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 658 | host->send_cmd(host, command, false); |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 659 | mxc_do_addr_cycle(mtd, column, page_addr); |
| 660 | |
Sascha Hauer | 2d69c7f | 2009-10-05 11:24:02 +0200 | [diff] [blame] | 661 | if (mtd->writesize > 512) |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 662 | host->send_cmd(host, NAND_CMD_READSTART, true); |
Sascha Hauer | c5d23f1 | 2009-06-04 17:25:53 +0200 | [diff] [blame] | 663 | |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 664 | host->send_page(mtd, NFC_OUTPUT); |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 665 | |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 666 | memcpy(host->data_buf, host->main_area0, mtd->writesize); |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 667 | copy_spare(mtd, true); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 668 | break; |
| 669 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 670 | case NAND_CMD_SEQIN: |
Sascha Hauer | 6c49939 | 2010-05-28 10:02:17 +0200 | [diff] [blame] | 671 | if (column >= mtd->writesize) |
| 672 | /* call ourself to read a page */ |
| 673 | mxc_nand_command(mtd, NAND_CMD_READ0, 0, page_addr); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 674 | |
Sascha Hauer | 6c49939 | 2010-05-28 10:02:17 +0200 | [diff] [blame] | 675 | host->buf_start = column; |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 676 | |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 677 | host->send_cmd(host, command, false); |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 678 | mxc_do_addr_cycle(mtd, column, page_addr); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 679 | break; |
| 680 | |
| 681 | case NAND_CMD_PAGEPROG: |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 682 | memcpy(host->main_area0, host->data_buf, mtd->writesize); |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 683 | copy_spare(mtd, false); |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 684 | host->send_page(mtd, NFC_INPUT); |
| 685 | host->send_cmd(host, command, true); |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 686 | mxc_do_addr_cycle(mtd, column, page_addr); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 687 | break; |
| 688 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 689 | case NAND_CMD_READID: |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 690 | host->send_cmd(host, command, true); |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 691 | mxc_do_addr_cycle(mtd, column, page_addr); |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 692 | host->send_read_id(host); |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 693 | host->buf_start = column; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 694 | break; |
| 695 | |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 696 | case NAND_CMD_ERASE1: |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 697 | case NAND_CMD_ERASE2: |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 698 | host->send_cmd(host, command, false); |
Sascha Hauer | 89121a6 | 2009-06-04 17:18:01 +0200 | [diff] [blame] | 699 | mxc_do_addr_cycle(mtd, column, page_addr); |
| 700 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 701 | break; |
| 702 | } |
| 703 | } |
| 704 | |
Sascha Hauer | f137205 | 2009-10-21 14:25:27 +0200 | [diff] [blame] | 705 | /* |
| 706 | * The generic flash bbt decriptors overlap with our ecc |
| 707 | * hardware, so define some i.MX specific ones. |
| 708 | */ |
| 709 | static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' }; |
| 710 | static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' }; |
| 711 | |
| 712 | static struct nand_bbt_descr bbt_main_descr = { |
| 713 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 714 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 715 | .offs = 0, |
| 716 | .len = 4, |
| 717 | .veroffs = 4, |
| 718 | .maxblocks = 4, |
| 719 | .pattern = bbt_pattern, |
| 720 | }; |
| 721 | |
| 722 | static struct nand_bbt_descr bbt_mirror_descr = { |
| 723 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 724 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 725 | .offs = 0, |
| 726 | .len = 4, |
| 727 | .veroffs = 4, |
| 728 | .maxblocks = 4, |
| 729 | .pattern = mirror_pattern, |
| 730 | }; |
| 731 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 732 | static int __init mxcnd_probe(struct platform_device *pdev) |
| 733 | { |
| 734 | struct nand_chip *this; |
| 735 | struct mtd_info *mtd; |
| 736 | struct mxc_nand_platform_data *pdata = pdev->dev.platform_data; |
| 737 | struct mxc_nand_host *host; |
| 738 | struct resource *res; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 739 | int err = 0, nr_parts = 0; |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 740 | struct nand_ecclayout *oob_smallpage, *oob_largepage; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 741 | |
| 742 | /* Allocate memory for MTD device structure and private data */ |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 743 | host = kzalloc(sizeof(struct mxc_nand_host) + NAND_MAX_PAGESIZE + |
| 744 | NAND_MAX_OOBSIZE, GFP_KERNEL); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 745 | if (!host) |
| 746 | return -ENOMEM; |
| 747 | |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 748 | host->data_buf = (uint8_t *)(host + 1); |
Sascha Hauer | f8f9608 | 2009-06-04 17:12:26 +0200 | [diff] [blame] | 749 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 750 | host->dev = &pdev->dev; |
| 751 | /* structures must be linked */ |
| 752 | this = &host->nand; |
| 753 | mtd = &host->mtd; |
| 754 | mtd->priv = this; |
| 755 | mtd->owner = THIS_MODULE; |
David Brownell | 87f39f0 | 2009-03-26 00:42:50 -0700 | [diff] [blame] | 756 | mtd->dev.parent = &pdev->dev; |
Sascha Hauer | 1fbff0a | 2009-10-21 16:06:27 +0200 | [diff] [blame] | 757 | mtd->name = DRIVER_NAME; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 758 | |
| 759 | /* 50 us command delay time */ |
| 760 | this->chip_delay = 5; |
| 761 | |
| 762 | this->priv = host; |
| 763 | this->dev_ready = mxc_nand_dev_ready; |
| 764 | this->cmdfunc = mxc_nand_command; |
| 765 | this->select_chip = mxc_nand_select_chip; |
| 766 | this->read_byte = mxc_nand_read_byte; |
| 767 | this->read_word = mxc_nand_read_word; |
| 768 | this->write_buf = mxc_nand_write_buf; |
| 769 | this->read_buf = mxc_nand_read_buf; |
| 770 | this->verify_buf = mxc_nand_verify_buf; |
| 771 | |
Sascha Hauer | e65fb00 | 2009-02-16 14:29:10 +0100 | [diff] [blame] | 772 | host->clk = clk_get(&pdev->dev, "nfc"); |
Vladimir Barinov | 8541c11 | 2009-04-23 15:47:22 +0400 | [diff] [blame] | 773 | if (IS_ERR(host->clk)) { |
| 774 | err = PTR_ERR(host->clk); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 775 | goto eclk; |
Vladimir Barinov | 8541c11 | 2009-04-23 15:47:22 +0400 | [diff] [blame] | 776 | } |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 777 | |
| 778 | clk_enable(host->clk); |
| 779 | host->clk_act = 1; |
| 780 | |
| 781 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 782 | if (!res) { |
| 783 | err = -ENODEV; |
| 784 | goto eres; |
| 785 | } |
| 786 | |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 787 | host->base = ioremap(res->start, resource_size(res)); |
| 788 | if (!host->base) { |
Vladimir Barinov | 8541c11 | 2009-04-23 15:47:22 +0400 | [diff] [blame] | 789 | err = -ENOMEM; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 790 | goto eres; |
| 791 | } |
| 792 | |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 793 | host->main_area0 = host->base; |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 794 | |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 795 | if (nfc_is_v1() || nfc_is_v21()) { |
| 796 | host->preset = preset_v1_v2; |
| 797 | host->send_cmd = send_cmd_v1_v2; |
| 798 | host->send_addr = send_addr_v1_v2; |
| 799 | host->send_page = send_page_v1_v2; |
| 800 | host->send_read_id = send_read_id_v1_v2; |
| 801 | host->get_dev_status = get_dev_status_v1_v2; |
Sascha Hauer | 7aaf28a | 2010-08-06 15:53:07 +0200 | [diff] [blame] | 802 | host->check_int = check_int_v1_v2; |
Sascha Hauer | 5f97304 | 2010-08-06 15:53:06 +0200 | [diff] [blame] | 803 | } |
| 804 | |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 805 | if (nfc_is_v21()) { |
Sascha Hauer | 938cf99 | 2010-08-06 15:53:04 +0200 | [diff] [blame] | 806 | host->regs = host->base + 0x1e00; |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 807 | host->spare0 = host->base + 0x1000; |
| 808 | host->spare_len = 64; |
| 809 | oob_smallpage = &nandv2_hw_eccoob_smallpage; |
| 810 | oob_largepage = &nandv2_hw_eccoob_largepage; |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 811 | this->ecc.bytes = 9; |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 812 | } else if (nfc_is_v1()) { |
Sascha Hauer | 938cf99 | 2010-08-06 15:53:04 +0200 | [diff] [blame] | 813 | host->regs = host->base + 0xe00; |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 814 | host->spare0 = host->base + 0x800; |
| 815 | host->spare_len = 16; |
| 816 | oob_smallpage = &nandv1_hw_eccoob_smallpage; |
| 817 | oob_largepage = &nandv1_hw_eccoob_largepage; |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 818 | this->ecc.bytes = 3; |
| 819 | } else |
| 820 | BUG(); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 821 | |
Sascha Hauer | 13e1add | 2009-10-21 10:39:05 +0200 | [diff] [blame] | 822 | this->ecc.size = 512; |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 823 | this->ecc.layout = oob_smallpage; |
Sascha Hauer | 13e1add | 2009-10-21 10:39:05 +0200 | [diff] [blame] | 824 | |
| 825 | if (pdata->hw_ecc) { |
| 826 | this->ecc.calculate = mxc_nand_calculate_ecc; |
| 827 | this->ecc.hwctl = mxc_nand_enable_hwecc; |
Sascha Hauer | 94f77e5 | 2010-08-06 15:53:09 +0200 | [diff] [blame^] | 828 | if (nfc_is_v1()) |
| 829 | this->ecc.correct = mxc_nand_correct_data_v1; |
| 830 | else |
| 831 | this->ecc.correct = mxc_nand_correct_data_v2_v3; |
Sascha Hauer | 13e1add | 2009-10-21 10:39:05 +0200 | [diff] [blame] | 832 | this->ecc.mode = NAND_ECC_HW; |
Sascha Hauer | 13e1add | 2009-10-21 10:39:05 +0200 | [diff] [blame] | 833 | } else { |
| 834 | this->ecc.mode = NAND_ECC_SOFT; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 835 | } |
| 836 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 837 | /* NAND bus width determines access funtions used by upper layer */ |
Sascha Hauer | 13e1add | 2009-10-21 10:39:05 +0200 | [diff] [blame] | 838 | if (pdata->width == 2) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 839 | this->options |= NAND_BUSWIDTH_16; |
Sascha Hauer | 13e1add | 2009-10-21 10:39:05 +0200 | [diff] [blame] | 840 | |
Sascha Hauer | f137205 | 2009-10-21 14:25:27 +0200 | [diff] [blame] | 841 | if (pdata->flash_bbt) { |
| 842 | this->bbt_td = &bbt_main_descr; |
| 843 | this->bbt_md = &bbt_mirror_descr; |
| 844 | /* update flash based bbt */ |
| 845 | this->options |= NAND_USE_FLASH_BBT; |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 846 | } |
| 847 | |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 848 | init_waitqueue_head(&host->irq_waitq); |
| 849 | |
| 850 | host->irq = platform_get_irq(pdev, 0); |
| 851 | |
Ivo Clarysse | a47bfd2 | 2010-04-08 16:16:51 +0200 | [diff] [blame] | 852 | err = request_irq(host->irq, mxc_nfc_irq, IRQF_DISABLED, DRIVER_NAME, host); |
Ivo Clarysse | d484018 | 2010-04-08 16:14:44 +0200 | [diff] [blame] | 853 | if (err) |
| 854 | goto eirq; |
| 855 | |
Vladimir Barinov | bd3fd62 | 2009-05-25 13:06:17 +0400 | [diff] [blame] | 856 | /* first scan to find the device and get the page size */ |
David Woodhouse | 5e81e88 | 2010-02-26 18:32:56 +0000 | [diff] [blame] | 857 | if (nand_scan_ident(mtd, 1, NULL)) { |
Vladimir Barinov | bd3fd62 | 2009-05-25 13:06:17 +0400 | [diff] [blame] | 858 | err = -ENXIO; |
| 859 | goto escan; |
| 860 | } |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 861 | |
Sascha Hauer | 2d69c7f | 2009-10-05 11:24:02 +0200 | [diff] [blame] | 862 | if (mtd->writesize == 2048) |
Sascha Hauer | 9467114 | 2009-10-05 12:14:21 +0200 | [diff] [blame] | 863 | this->ecc.layout = oob_largepage; |
Vladimir Barinov | bd3fd62 | 2009-05-25 13:06:17 +0400 | [diff] [blame] | 864 | |
| 865 | /* second phase scan */ |
| 866 | if (nand_scan_tail(mtd)) { |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 867 | err = -ENXIO; |
| 868 | goto escan; |
| 869 | } |
| 870 | |
| 871 | /* Register the partitions */ |
| 872 | #ifdef CONFIG_MTD_PARTITIONS |
| 873 | nr_parts = |
| 874 | parse_mtd_partitions(mtd, part_probes, &host->parts, 0); |
| 875 | if (nr_parts > 0) |
| 876 | add_mtd_partitions(mtd, host->parts, nr_parts); |
| 877 | else |
| 878 | #endif |
| 879 | { |
| 880 | pr_info("Registering %s as whole device\n", mtd->name); |
| 881 | add_mtd_device(mtd); |
| 882 | } |
| 883 | |
| 884 | platform_set_drvdata(pdev, host); |
| 885 | |
| 886 | return 0; |
| 887 | |
| 888 | escan: |
Magnus Lilja | b258fd8 | 2009-05-08 21:57:47 +0200 | [diff] [blame] | 889 | free_irq(host->irq, host); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 890 | eirq: |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 891 | iounmap(host->base); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 892 | eres: |
| 893 | clk_put(host->clk); |
| 894 | eclk: |
| 895 | kfree(host); |
| 896 | |
| 897 | return err; |
| 898 | } |
| 899 | |
Uwe Kleine-König | 51eeb87 | 2009-12-07 09:44:05 +0000 | [diff] [blame] | 900 | static int __devexit mxcnd_remove(struct platform_device *pdev) |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 901 | { |
| 902 | struct mxc_nand_host *host = platform_get_drvdata(pdev); |
| 903 | |
| 904 | clk_put(host->clk); |
| 905 | |
| 906 | platform_set_drvdata(pdev, NULL); |
| 907 | |
| 908 | nand_release(&host->mtd); |
Magnus Lilja | b258fd8 | 2009-05-08 21:57:47 +0200 | [diff] [blame] | 909 | free_irq(host->irq, host); |
Sascha Hauer | c6de7e1 | 2009-10-05 11:14:35 +0200 | [diff] [blame] | 910 | iounmap(host->base); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 911 | kfree(host); |
| 912 | |
| 913 | return 0; |
| 914 | } |
| 915 | |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 916 | static struct platform_driver mxcnd_driver = { |
| 917 | .driver = { |
| 918 | .name = DRIVER_NAME, |
Eric Bénard | 04dd0d3 | 2010-06-17 20:59:04 +0200 | [diff] [blame] | 919 | }, |
Uwe Kleine-König | daa0f15 | 2009-11-24 22:07:08 +0100 | [diff] [blame] | 920 | .remove = __devexit_p(mxcnd_remove), |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 921 | }; |
| 922 | |
| 923 | static int __init mxc_nd_init(void) |
| 924 | { |
Vladimir Barinov | 8541c11 | 2009-04-23 15:47:22 +0400 | [diff] [blame] | 925 | return platform_driver_probe(&mxcnd_driver, mxcnd_probe); |
Sascha Hauer | 34f6e15 | 2008-09-02 17:16:59 +0200 | [diff] [blame] | 926 | } |
| 927 | |
| 928 | static void __exit mxc_nd_cleanup(void) |
| 929 | { |
| 930 | /* Unregister the device structure */ |
| 931 | platform_driver_unregister(&mxcnd_driver); |
| 932 | } |
| 933 | |
| 934 | module_init(mxc_nd_init); |
| 935 | module_exit(mxc_nd_cleanup); |
| 936 | |
| 937 | MODULE_AUTHOR("Freescale Semiconductor, Inc."); |
| 938 | MODULE_DESCRIPTION("MXC NAND MTD driver"); |
| 939 | MODULE_LICENSE("GPL"); |