Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Freescale UPM NAND driver. |
| 3 | * |
| 4 | * Copyright © 2007-2008 MontaVista Software, Inc. |
| 5 | * |
| 6 | * Author: Anton Vorontsov <avorontsov@ru.mvista.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
Wolfgang Grandegger | 13f5369 | 2008-06-09 10:19:08 +0200 | [diff] [blame] | 16 | #include <linux/delay.h> |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 17 | #include <linux/mtd/nand.h> |
| 18 | #include <linux/mtd/nand_ecc.h> |
| 19 | #include <linux/mtd/partitions.h> |
| 20 | #include <linux/mtd/mtd.h> |
| 21 | #include <linux/of_platform.h> |
| 22 | #include <linux/of_gpio.h> |
| 23 | #include <linux/io.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 24 | #include <linux/slab.h> |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 25 | #include <asm/fsl_lbc.h> |
| 26 | |
Wolfgang Grandegger | ade92a6 | 2009-03-30 12:02:43 +0200 | [diff] [blame] | 27 | #define FSL_UPM_WAIT_RUN_PATTERN 0x1 |
| 28 | #define FSL_UPM_WAIT_WRITE_BYTE 0x2 |
| 29 | #define FSL_UPM_WAIT_WRITE_BUFFER 0x4 |
| 30 | |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 31 | struct fsl_upm_nand { |
| 32 | struct device *dev; |
| 33 | struct mtd_info mtd; |
| 34 | struct nand_chip chip; |
| 35 | int last_ctrl; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 36 | struct mtd_partition *parts; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 37 | struct fsl_upm upm; |
| 38 | uint8_t upm_addr_offset; |
| 39 | uint8_t upm_cmd_offset; |
| 40 | void __iomem *io_base; |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 41 | int rnb_gpio[NAND_MAX_CHIPS]; |
| 42 | uint32_t mchip_offsets[NAND_MAX_CHIPS]; |
| 43 | uint32_t mchip_count; |
| 44 | uint32_t mchip_number; |
Wolfgang Grandegger | 13f5369 | 2008-06-09 10:19:08 +0200 | [diff] [blame] | 45 | int chip_delay; |
Wolfgang Grandegger | ade92a6 | 2009-03-30 12:02:43 +0200 | [diff] [blame] | 46 | uint32_t wait_flags; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 47 | }; |
| 48 | |
Ferenc Wagner | b92b5c4 | 2010-03-23 18:08:16 +0100 | [diff] [blame] | 49 | static inline struct fsl_upm_nand *to_fsl_upm_nand(struct mtd_info *mtdinfo) |
| 50 | { |
| 51 | return container_of(mtdinfo, struct fsl_upm_nand, mtd); |
| 52 | } |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 53 | |
| 54 | static int fun_chip_ready(struct mtd_info *mtd) |
| 55 | { |
| 56 | struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); |
| 57 | |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 58 | if (gpio_get_value(fun->rnb_gpio[fun->mchip_number])) |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 59 | return 1; |
| 60 | |
| 61 | dev_vdbg(fun->dev, "busy\n"); |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static void fun_wait_rnb(struct fsl_upm_nand *fun) |
| 66 | { |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 67 | if (fun->rnb_gpio[fun->mchip_number] >= 0) { |
| 68 | int cnt = 1000000; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 69 | |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 70 | while (--cnt && !fun_chip_ready(&fun->mtd)) |
| 71 | cpu_relax(); |
Wolfgang Grandegger | 13f5369 | 2008-06-09 10:19:08 +0200 | [diff] [blame] | 72 | if (!cnt) |
| 73 | dev_err(fun->dev, "tired waiting for RNB\n"); |
| 74 | } else { |
| 75 | ndelay(100); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 76 | } |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) |
| 80 | { |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 81 | struct nand_chip *chip = mtd->priv; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 82 | struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 83 | u32 mar; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 84 | |
| 85 | if (!(ctrl & fun->last_ctrl)) { |
| 86 | fsl_upm_end_pattern(&fun->upm); |
| 87 | |
| 88 | if (cmd == NAND_CMD_NONE) |
| 89 | return; |
| 90 | |
| 91 | fun->last_ctrl = ctrl & (NAND_ALE | NAND_CLE); |
| 92 | } |
| 93 | |
| 94 | if (ctrl & NAND_CTRL_CHANGE) { |
| 95 | if (ctrl & NAND_ALE) |
| 96 | fsl_upm_start_pattern(&fun->upm, fun->upm_addr_offset); |
| 97 | else if (ctrl & NAND_CLE) |
| 98 | fsl_upm_start_pattern(&fun->upm, fun->upm_cmd_offset); |
| 99 | } |
| 100 | |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 101 | mar = (cmd << (32 - fun->upm.width)) | |
| 102 | fun->mchip_offsets[fun->mchip_number]; |
| 103 | fsl_upm_run_pattern(&fun->upm, chip->IO_ADDR_R, mar); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 104 | |
Wolfgang Grandegger | ade92a6 | 2009-03-30 12:02:43 +0200 | [diff] [blame] | 105 | if (fun->wait_flags & FSL_UPM_WAIT_RUN_PATTERN) |
| 106 | fun_wait_rnb(fun); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 107 | } |
| 108 | |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 109 | static void fun_select_chip(struct mtd_info *mtd, int mchip_nr) |
| 110 | { |
| 111 | struct nand_chip *chip = mtd->priv; |
| 112 | struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); |
| 113 | |
| 114 | if (mchip_nr == -1) { |
| 115 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
Roel Kluin | 35016dd | 2009-11-03 20:49:18 +0100 | [diff] [blame] | 116 | } else if (mchip_nr >= 0 && mchip_nr < NAND_MAX_CHIPS) { |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 117 | fun->mchip_number = mchip_nr; |
| 118 | chip->IO_ADDR_R = fun->io_base + fun->mchip_offsets[mchip_nr]; |
| 119 | chip->IO_ADDR_W = chip->IO_ADDR_R; |
| 120 | } else { |
| 121 | BUG(); |
| 122 | } |
| 123 | } |
| 124 | |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 125 | static uint8_t fun_read_byte(struct mtd_info *mtd) |
| 126 | { |
| 127 | struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); |
| 128 | |
| 129 | return in_8(fun->chip.IO_ADDR_R); |
| 130 | } |
| 131 | |
| 132 | static void fun_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) |
| 133 | { |
| 134 | struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); |
| 135 | int i; |
| 136 | |
| 137 | for (i = 0; i < len; i++) |
| 138 | buf[i] = in_8(fun->chip.IO_ADDR_R); |
| 139 | } |
| 140 | |
| 141 | static void fun_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
| 142 | { |
| 143 | struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); |
| 144 | int i; |
| 145 | |
| 146 | for (i = 0; i < len; i++) { |
| 147 | out_8(fun->chip.IO_ADDR_W, buf[i]); |
Wolfgang Grandegger | ade92a6 | 2009-03-30 12:02:43 +0200 | [diff] [blame] | 148 | if (fun->wait_flags & FSL_UPM_WAIT_WRITE_BYTE) |
| 149 | fun_wait_rnb(fun); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 150 | } |
Wolfgang Grandegger | ade92a6 | 2009-03-30 12:02:43 +0200 | [diff] [blame] | 151 | if (fun->wait_flags & FSL_UPM_WAIT_WRITE_BUFFER) |
| 152 | fun_wait_rnb(fun); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 153 | } |
| 154 | |
Anton Vorontsov | 95ebffd | 2008-09-18 20:50:26 +0400 | [diff] [blame] | 155 | static int __devinit fun_chip_init(struct fsl_upm_nand *fun, |
| 156 | const struct device_node *upm_np, |
| 157 | const struct resource *io_res) |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 158 | { |
| 159 | int ret; |
Anton Vorontsov | 95ebffd | 2008-09-18 20:50:26 +0400 | [diff] [blame] | 160 | struct device_node *flash_np; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 161 | static const char *part_types[] = { "cmdlinepart", NULL, }; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 162 | |
| 163 | fun->chip.IO_ADDR_R = fun->io_base; |
| 164 | fun->chip.IO_ADDR_W = fun->io_base; |
| 165 | fun->chip.cmd_ctrl = fun_cmd_ctrl; |
Wolfgang Grandegger | 13f5369 | 2008-06-09 10:19:08 +0200 | [diff] [blame] | 166 | fun->chip.chip_delay = fun->chip_delay; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 167 | fun->chip.read_byte = fun_read_byte; |
| 168 | fun->chip.read_buf = fun_read_buf; |
| 169 | fun->chip.write_buf = fun_write_buf; |
| 170 | fun->chip.ecc.mode = NAND_ECC_SOFT; |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 171 | if (fun->mchip_count > 1) |
| 172 | fun->chip.select_chip = fun_select_chip; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 173 | |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 174 | if (fun->rnb_gpio[0] >= 0) |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 175 | fun->chip.dev_ready = fun_chip_ready; |
| 176 | |
| 177 | fun->mtd.priv = &fun->chip; |
| 178 | fun->mtd.owner = THIS_MODULE; |
| 179 | |
Anton Vorontsov | 95ebffd | 2008-09-18 20:50:26 +0400 | [diff] [blame] | 180 | flash_np = of_get_next_child(upm_np, NULL); |
| 181 | if (!flash_np) |
| 182 | return -ENODEV; |
| 183 | |
Roy Zang | 0eecf4b | 2010-09-08 16:47:55 +0800 | [diff] [blame] | 184 | fun->mtd.name = kasprintf(GFP_KERNEL, "0x%llx.%s", (u64)io_res->start, |
Anton Vorontsov | 95ebffd | 2008-09-18 20:50:26 +0400 | [diff] [blame] | 185 | flash_np->name); |
| 186 | if (!fun->mtd.name) { |
| 187 | ret = -ENOMEM; |
| 188 | goto err; |
| 189 | } |
| 190 | |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 191 | ret = nand_scan(&fun->mtd, fun->mchip_count); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 192 | if (ret) |
Anton Vorontsov | 95ebffd | 2008-09-18 20:50:26 +0400 | [diff] [blame] | 193 | goto err; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 194 | |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 195 | ret = parse_mtd_partitions(&fun->mtd, part_types, &fun->parts, 0); |
Anton Vorontsov | 95ebffd | 2008-09-18 20:50:26 +0400 | [diff] [blame] | 196 | |
| 197 | #ifdef CONFIG_MTD_OF_PARTS |
Wolfgang Grandegger | 29b6586 | 2008-11-27 09:46:13 +0000 | [diff] [blame] | 198 | if (ret == 0) { |
| 199 | ret = of_mtd_parse_partitions(fun->dev, flash_np, &fun->parts); |
| 200 | if (ret < 0) |
| 201 | goto err; |
| 202 | } |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 203 | #endif |
Jamie Iles | 13c41db | 2011-05-23 10:23:22 +0100 | [diff] [blame] | 204 | ret = mtd_device_register(&fun->mtd, fun->parts, ret); |
Anton Vorontsov | 95ebffd | 2008-09-18 20:50:26 +0400 | [diff] [blame] | 205 | err: |
| 206 | of_node_put(flash_np); |
| 207 | return ret; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 208 | } |
| 209 | |
Grant Likely | 1c48a5c | 2011-02-17 02:43:24 -0700 | [diff] [blame] | 210 | static int __devinit fun_probe(struct platform_device *ofdev) |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 211 | { |
| 212 | struct fsl_upm_nand *fun; |
| 213 | struct resource io_res; |
Ian Munsie | 766f271 | 2010-10-01 17:06:08 +1000 | [diff] [blame] | 214 | const __be32 *prop; |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 215 | int rnb_gpio; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 216 | int ret; |
| 217 | int size; |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 218 | int i; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 219 | |
| 220 | fun = kzalloc(sizeof(*fun), GFP_KERNEL); |
| 221 | if (!fun) |
| 222 | return -ENOMEM; |
| 223 | |
Anatolij Gustschin | c8a4d0f | 2010-06-03 02:37:17 +0200 | [diff] [blame] | 224 | ret = of_address_to_resource(ofdev->dev.of_node, 0, &io_res); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 225 | if (ret) { |
| 226 | dev_err(&ofdev->dev, "can't get IO base\n"); |
| 227 | goto err1; |
| 228 | } |
| 229 | |
| 230 | ret = fsl_upm_find(io_res.start, &fun->upm); |
| 231 | if (ret) { |
| 232 | dev_err(&ofdev->dev, "can't find UPM\n"); |
| 233 | goto err1; |
| 234 | } |
| 235 | |
Anatolij Gustschin | c8a4d0f | 2010-06-03 02:37:17 +0200 | [diff] [blame] | 236 | prop = of_get_property(ofdev->dev.of_node, "fsl,upm-addr-offset", |
| 237 | &size); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 238 | if (!prop || size != sizeof(uint32_t)) { |
| 239 | dev_err(&ofdev->dev, "can't get UPM address offset\n"); |
| 240 | ret = -EINVAL; |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 241 | goto err1; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 242 | } |
| 243 | fun->upm_addr_offset = *prop; |
| 244 | |
Anatolij Gustschin | c8a4d0f | 2010-06-03 02:37:17 +0200 | [diff] [blame] | 245 | prop = of_get_property(ofdev->dev.of_node, "fsl,upm-cmd-offset", &size); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 246 | if (!prop || size != sizeof(uint32_t)) { |
| 247 | dev_err(&ofdev->dev, "can't get UPM command offset\n"); |
| 248 | ret = -EINVAL; |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 249 | goto err1; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 250 | } |
| 251 | fun->upm_cmd_offset = *prop; |
| 252 | |
Anatolij Gustschin | c8a4d0f | 2010-06-03 02:37:17 +0200 | [diff] [blame] | 253 | prop = of_get_property(ofdev->dev.of_node, |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 254 | "fsl,upm-addr-line-cs-offsets", &size); |
| 255 | if (prop && (size / sizeof(uint32_t)) > 0) { |
| 256 | fun->mchip_count = size / sizeof(uint32_t); |
| 257 | if (fun->mchip_count >= NAND_MAX_CHIPS) { |
| 258 | dev_err(&ofdev->dev, "too much multiple chips\n"); |
| 259 | goto err1; |
| 260 | } |
| 261 | for (i = 0; i < fun->mchip_count; i++) |
Ian Munsie | 766f271 | 2010-10-01 17:06:08 +1000 | [diff] [blame] | 262 | fun->mchip_offsets[i] = be32_to_cpu(prop[i]); |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 263 | } else { |
| 264 | fun->mchip_count = 1; |
| 265 | } |
| 266 | |
| 267 | for (i = 0; i < fun->mchip_count; i++) { |
| 268 | fun->rnb_gpio[i] = -1; |
Anatolij Gustschin | c8a4d0f | 2010-06-03 02:37:17 +0200 | [diff] [blame] | 269 | rnb_gpio = of_get_gpio(ofdev->dev.of_node, i); |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 270 | if (rnb_gpio >= 0) { |
| 271 | ret = gpio_request(rnb_gpio, dev_name(&ofdev->dev)); |
| 272 | if (ret) { |
| 273 | dev_err(&ofdev->dev, |
| 274 | "can't request RNB gpio #%d\n", i); |
| 275 | goto err2; |
| 276 | } |
| 277 | gpio_direction_input(rnb_gpio); |
| 278 | fun->rnb_gpio[i] = rnb_gpio; |
| 279 | } else if (rnb_gpio == -EINVAL) { |
| 280 | dev_err(&ofdev->dev, "RNB gpio #%d is invalid\n", i); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 281 | goto err2; |
| 282 | } |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 283 | } |
| 284 | |
Anatolij Gustschin | c8a4d0f | 2010-06-03 02:37:17 +0200 | [diff] [blame] | 285 | prop = of_get_property(ofdev->dev.of_node, "chip-delay", NULL); |
Wolfgang Grandegger | 13f5369 | 2008-06-09 10:19:08 +0200 | [diff] [blame] | 286 | if (prop) |
Ian Munsie | 766f271 | 2010-10-01 17:06:08 +1000 | [diff] [blame] | 287 | fun->chip_delay = be32_to_cpup(prop); |
Wolfgang Grandegger | 13f5369 | 2008-06-09 10:19:08 +0200 | [diff] [blame] | 288 | else |
| 289 | fun->chip_delay = 50; |
| 290 | |
Anatolij Gustschin | c8a4d0f | 2010-06-03 02:37:17 +0200 | [diff] [blame] | 291 | prop = of_get_property(ofdev->dev.of_node, "fsl,upm-wait-flags", &size); |
Wolfgang Grandegger | ade92a6 | 2009-03-30 12:02:43 +0200 | [diff] [blame] | 292 | if (prop && size == sizeof(uint32_t)) |
Ian Munsie | 766f271 | 2010-10-01 17:06:08 +1000 | [diff] [blame] | 293 | fun->wait_flags = be32_to_cpup(prop); |
Wolfgang Grandegger | ade92a6 | 2009-03-30 12:02:43 +0200 | [diff] [blame] | 294 | else |
| 295 | fun->wait_flags = FSL_UPM_WAIT_RUN_PATTERN | |
| 296 | FSL_UPM_WAIT_WRITE_BYTE; |
| 297 | |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 298 | fun->io_base = devm_ioremap_nocache(&ofdev->dev, io_res.start, |
H Hartley Sweeten | 58e6a84 | 2009-12-14 16:22:49 -0500 | [diff] [blame] | 299 | resource_size(&io_res)); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 300 | if (!fun->io_base) { |
| 301 | ret = -ENOMEM; |
| 302 | goto err2; |
| 303 | } |
| 304 | |
| 305 | fun->dev = &ofdev->dev; |
| 306 | fun->last_ctrl = NAND_CLE; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 307 | |
Anatolij Gustschin | c8a4d0f | 2010-06-03 02:37:17 +0200 | [diff] [blame] | 308 | ret = fun_chip_init(fun, ofdev->dev.of_node, &io_res); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 309 | if (ret) |
| 310 | goto err2; |
| 311 | |
| 312 | dev_set_drvdata(&ofdev->dev, fun); |
| 313 | |
| 314 | return 0; |
| 315 | err2: |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 316 | for (i = 0; i < fun->mchip_count; i++) { |
| 317 | if (fun->rnb_gpio[i] < 0) |
| 318 | break; |
| 319 | gpio_free(fun->rnb_gpio[i]); |
| 320 | } |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 321 | err1: |
| 322 | kfree(fun); |
| 323 | |
| 324 | return ret; |
| 325 | } |
| 326 | |
Grant Likely | 2dc1158 | 2010-08-06 09:25:50 -0600 | [diff] [blame] | 327 | static int __devexit fun_remove(struct platform_device *ofdev) |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 328 | { |
| 329 | struct fsl_upm_nand *fun = dev_get_drvdata(&ofdev->dev); |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 330 | int i; |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 331 | |
| 332 | nand_release(&fun->mtd); |
Anton Vorontsov | 95ebffd | 2008-09-18 20:50:26 +0400 | [diff] [blame] | 333 | kfree(fun->mtd.name); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 334 | |
Wolfgang Grandegger | b6e0e8c | 2009-03-30 12:02:42 +0200 | [diff] [blame] | 335 | for (i = 0; i < fun->mchip_count; i++) { |
| 336 | if (fun->rnb_gpio[i] < 0) |
| 337 | break; |
| 338 | gpio_free(fun->rnb_gpio[i]); |
| 339 | } |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 340 | |
| 341 | kfree(fun); |
| 342 | |
| 343 | return 0; |
| 344 | } |
| 345 | |
Márton Németh | b2d4fba | 2010-01-09 15:10:46 +0100 | [diff] [blame] | 346 | static const struct of_device_id of_fun_match[] = { |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 347 | { .compatible = "fsl,upm-nand" }, |
| 348 | {}, |
| 349 | }; |
| 350 | MODULE_DEVICE_TABLE(of, of_fun_match); |
| 351 | |
Grant Likely | 1c48a5c | 2011-02-17 02:43:24 -0700 | [diff] [blame] | 352 | static struct platform_driver of_fun_driver = { |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 353 | .driver = { |
| 354 | .name = "fsl,upm-nand", |
| 355 | .owner = THIS_MODULE, |
| 356 | .of_match_table = of_fun_match, |
| 357 | }, |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 358 | .probe = fun_probe, |
| 359 | .remove = __devexit_p(fun_remove), |
| 360 | }; |
| 361 | |
| 362 | static int __init fun_module_init(void) |
| 363 | { |
Grant Likely | 1c48a5c | 2011-02-17 02:43:24 -0700 | [diff] [blame] | 364 | return platform_driver_register(&of_fun_driver); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 365 | } |
| 366 | module_init(fun_module_init); |
| 367 | |
| 368 | static void __exit fun_module_exit(void) |
| 369 | { |
Grant Likely | 1c48a5c | 2011-02-17 02:43:24 -0700 | [diff] [blame] | 370 | platform_driver_unregister(&of_fun_driver); |
Anton Vorontsov | 5c249c5 | 2008-03-11 22:33:13 +0300 | [diff] [blame] | 371 | } |
| 372 | module_exit(fun_module_exit); |
| 373 | |
| 374 | MODULE_LICENSE("GPL"); |
| 375 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); |
| 376 | MODULE_DESCRIPTION("Driver for NAND chips working through Freescale " |
| 377 | "LocalBus User-Programmable Machine"); |