Sahitya Tummala | 719c6b5 | 2015-05-21 08:28:19 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2015, The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #include "sdhci-msm-ice.h" |
| 15 | |
| 16 | static void sdhci_msm_ice_success_cb(void *host_ctrl, |
| 17 | enum ice_event_completion evt) |
| 18 | { |
| 19 | struct sdhci_msm_host *msm_host = (struct sdhci_msm_host *)host_ctrl; |
| 20 | |
| 21 | if ((msm_host->ice.state == SDHCI_MSM_ICE_STATE_DISABLED && |
| 22 | evt == ICE_INIT_COMPLETION) || (msm_host->ice.state == |
| 23 | SDHCI_MSM_ICE_STATE_SUSPENDED && evt == ICE_RESUME_COMPLETION)) |
| 24 | msm_host->ice.state = SDHCI_MSM_ICE_STATE_ACTIVE; |
| 25 | |
| 26 | complete(&msm_host->ice.async_done); |
| 27 | } |
| 28 | |
| 29 | static void sdhci_msm_ice_error_cb(void *host_ctrl, enum ice_error_code evt) |
| 30 | { |
| 31 | struct sdhci_msm_host *msm_host = (struct sdhci_msm_host *)host_ctrl; |
| 32 | |
| 33 | dev_err(&msm_host->pdev->dev, "%s: Error in ice operation %d", |
| 34 | __func__, evt); |
| 35 | |
| 36 | if (msm_host->ice.state == SDHCI_MSM_ICE_STATE_ACTIVE) |
| 37 | msm_host->ice.state = SDHCI_MSM_ICE_STATE_DISABLED; |
| 38 | |
| 39 | complete(&msm_host->ice.async_done); |
| 40 | } |
| 41 | |
| 42 | static struct platform_device *sdhci_msm_ice_get_pdevice(struct device *dev) |
| 43 | { |
| 44 | struct device_node *node; |
| 45 | struct platform_device *ice_pdev = NULL; |
| 46 | |
| 47 | node = of_parse_phandle(dev->of_node, SDHC_MSM_CRYPTO_LABEL, 0); |
| 48 | if (!node) { |
| 49 | dev_dbg(dev, "%s: sdhc-msm-crypto property not specified\n", |
| 50 | __func__); |
| 51 | goto out; |
| 52 | } |
| 53 | ice_pdev = qcom_ice_get_pdevice(node); |
| 54 | out: |
| 55 | return ice_pdev; |
| 56 | } |
| 57 | |
| 58 | static |
| 59 | struct qcom_ice_variant_ops *sdhci_msm_ice_get_vops(struct device *dev) |
| 60 | { |
| 61 | struct qcom_ice_variant_ops *ice_vops = NULL; |
| 62 | struct device_node *node; |
| 63 | |
| 64 | node = of_parse_phandle(dev->of_node, SDHC_MSM_CRYPTO_LABEL, 0); |
| 65 | if (!node) { |
| 66 | dev_dbg(dev, "%s: sdhc-msm-crypto property not specified\n", |
| 67 | __func__); |
| 68 | goto out; |
| 69 | } |
| 70 | ice_vops = qcom_ice_get_variant_ops(node); |
| 71 | of_node_put(node); |
| 72 | out: |
| 73 | return ice_vops; |
| 74 | } |
| 75 | |
| 76 | int sdhci_msm_ice_get_dev(struct sdhci_host *host) |
| 77 | { |
| 78 | struct device *sdhc_dev; |
| 79 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| 80 | struct sdhci_msm_host *msm_host = pltfm_host->priv; |
| 81 | |
| 82 | if (!msm_host || !msm_host->pdev) { |
| 83 | pr_err("%s: invalid msm_host %p or msm_host->pdev\n", |
| 84 | __func__, msm_host); |
| 85 | return -EINVAL; |
| 86 | } |
| 87 | |
| 88 | sdhc_dev = &msm_host->pdev->dev; |
| 89 | msm_host->ice.vops = sdhci_msm_ice_get_vops(sdhc_dev); |
| 90 | msm_host->ice.pdev = sdhci_msm_ice_get_pdevice(sdhc_dev); |
| 91 | |
| 92 | if (msm_host->ice.pdev == ERR_PTR(-EPROBE_DEFER)) { |
| 93 | dev_err(sdhc_dev, "%s: ICE device not probed yet\n", |
| 94 | __func__); |
| 95 | msm_host->ice.pdev = NULL; |
| 96 | msm_host->ice.vops = NULL; |
| 97 | return -EPROBE_DEFER; |
| 98 | } |
| 99 | |
| 100 | if (!msm_host->ice.pdev) { |
| 101 | dev_dbg(sdhc_dev, "%s: invalid platform device\n", __func__); |
| 102 | msm_host->ice.vops = NULL; |
| 103 | return -ENODEV; |
| 104 | } |
| 105 | if (!msm_host->ice.vops) { |
| 106 | dev_dbg(sdhc_dev, "%s: invalid ice vops\n", __func__); |
| 107 | msm_host->ice.pdev = NULL; |
| 108 | return -ENODEV; |
| 109 | } |
| 110 | msm_host->ice.state = SDHCI_MSM_ICE_STATE_DISABLED; |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | int sdhci_msm_ice_init(struct sdhci_host *host) |
| 115 | { |
| 116 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| 117 | struct sdhci_msm_host *msm_host = pltfm_host->priv; |
| 118 | int err = 0; |
| 119 | |
| 120 | init_completion(&msm_host->ice.async_done); |
| 121 | if (msm_host->ice.vops->config) { |
| 122 | err = msm_host->ice.vops->init(msm_host->ice.pdev, |
| 123 | msm_host, |
| 124 | sdhci_msm_ice_success_cb, |
| 125 | sdhci_msm_ice_error_cb); |
| 126 | if (err) { |
| 127 | pr_err("%s: ice init err %d\n", |
| 128 | mmc_hostname(host->mmc), err); |
| 129 | return err; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | if (!wait_for_completion_timeout(&msm_host->ice.async_done, |
| 134 | msecs_to_jiffies(SDHCI_MSM_ICE_COMPLETION_TIMEOUT_MS))) { |
| 135 | pr_err("%s: ice init timedout after %d ms\n", |
| 136 | mmc_hostname(host->mmc), |
| 137 | SDHCI_MSM_ICE_COMPLETION_TIMEOUT_MS); |
| 138 | return -ETIMEDOUT; |
| 139 | } |
| 140 | |
| 141 | if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) { |
| 142 | pr_err("%s: ice is in invalid state %d\n", |
| 143 | mmc_hostname(host->mmc), msm_host->ice.state); |
| 144 | return -EINVAL; |
| 145 | } |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | int sdhci_msm_ice_cfg(struct sdhci_host *host, struct mmc_request *mrq, |
| 150 | u32 slot) |
| 151 | { |
| 152 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| 153 | struct sdhci_msm_host *msm_host = pltfm_host->priv; |
| 154 | int err = 0; |
| 155 | struct ice_data_setting ice_set; |
| 156 | sector_t lba = 0; |
| 157 | unsigned int ctrl_info_val = 0; |
| 158 | unsigned int bypass = SDHCI_MSM_ICE_ENABLE_BYPASS; |
| 159 | struct request *req; |
| 160 | |
| 161 | if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) { |
| 162 | pr_err("%s: ice is in invalid state %d\n", |
| 163 | mmc_hostname(host->mmc), msm_host->ice.state); |
| 164 | return -EINVAL; |
| 165 | } |
| 166 | |
| 167 | BUG_ON(!mrq); |
| 168 | memset(&ice_set, 0, sizeof(struct ice_data_setting)); |
| 169 | req = mrq->req; |
| 170 | if (req) { |
| 171 | lba = req->__sector; |
| 172 | if (msm_host->ice.vops->config) { |
| 173 | err = msm_host->ice.vops->config(msm_host->ice.pdev, |
| 174 | req, &ice_set); |
| 175 | if (err) { |
| 176 | pr_err("%s: ice config failed %d\n", |
| 177 | mmc_hostname(host->mmc), err); |
| 178 | return err; |
| 179 | } |
| 180 | } |
| 181 | /* if writing data command */ |
| 182 | if (rq_data_dir(req) == WRITE) |
| 183 | bypass = ice_set.encr_bypass ? |
| 184 | SDHCI_MSM_ICE_ENABLE_BYPASS : |
| 185 | SDHCI_MSM_ICE_DISABLE_BYPASS; |
| 186 | /* if reading data command */ |
| 187 | else if (rq_data_dir(req) == READ) |
| 188 | bypass = ice_set.decr_bypass ? |
| 189 | SDHCI_MSM_ICE_ENABLE_BYPASS : |
| 190 | SDHCI_MSM_ICE_DISABLE_BYPASS; |
| 191 | pr_debug("%s: %s: slot %d encr_bypass %d bypass %d decr_bypass %d key_index %d\n", |
| 192 | mmc_hostname(host->mmc), |
| 193 | (rq_data_dir(req) == WRITE) ? "WRITE" : "READ", |
| 194 | slot, ice_set.encr_bypass, bypass, |
| 195 | ice_set.decr_bypass, |
| 196 | ice_set.crypto_data.key_index); |
| 197 | } |
| 198 | |
| 199 | /* Configure ICE index */ |
| 200 | ctrl_info_val = |
| 201 | (ice_set.crypto_data.key_index & |
| 202 | MASK_SDHCI_MSM_ICE_CTRL_INFO_KEY_INDEX) |
| 203 | << OFFSET_SDHCI_MSM_ICE_CTRL_INFO_KEY_INDEX; |
| 204 | |
| 205 | /* Configure data unit size of transfer request */ |
| 206 | ctrl_info_val |= |
| 207 | (SDHCI_MSM_ICE_TR_DATA_UNIT_512_B & |
| 208 | MASK_SDHCI_MSM_ICE_CTRL_INFO_CDU) |
| 209 | << OFFSET_SDHCI_MSM_ICE_CTRL_INFO_CDU; |
| 210 | |
| 211 | /* Configure ICE bypass mode */ |
| 212 | ctrl_info_val |= |
| 213 | (bypass & MASK_SDHCI_MSM_ICE_CTRL_INFO_BYPASS) |
| 214 | << OFFSET_SDHCI_MSM_ICE_CTRL_INFO_BYPASS; |
| 215 | |
| 216 | writel_relaxed((lba & 0xFFFFFFFF), |
| 217 | host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_1_n + 16 * slot); |
| 218 | writel_relaxed(((lba >> 32) & 0xFFFFFFFF), |
| 219 | host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_2_n + 16 * slot); |
| 220 | writel_relaxed(ctrl_info_val, |
| 221 | host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_3_n + 16 * slot); |
| 222 | |
| 223 | /* Ensure ICE registers are configured before issuing SDHCI request */ |
| 224 | mb(); |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | int sdhci_msm_ice_reset(struct sdhci_host *host) |
| 229 | { |
| 230 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| 231 | struct sdhci_msm_host *msm_host = pltfm_host->priv; |
| 232 | int err = 0; |
| 233 | |
| 234 | if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) { |
| 235 | pr_err("%s: ice is in invalid state before reset %d\n", |
| 236 | mmc_hostname(host->mmc), msm_host->ice.state); |
| 237 | return -EINVAL; |
| 238 | } |
| 239 | |
| 240 | init_completion(&msm_host->ice.async_done); |
| 241 | |
| 242 | if (msm_host->ice.vops->reset) { |
| 243 | err = msm_host->ice.vops->reset(msm_host->ice.pdev); |
| 244 | if (err) { |
| 245 | pr_err("%s: ice reset failed %d\n", |
| 246 | mmc_hostname(host->mmc), err); |
| 247 | return err; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | if (!wait_for_completion_timeout(&msm_host->ice.async_done, |
| 252 | msecs_to_jiffies(SDHCI_MSM_ICE_COMPLETION_TIMEOUT_MS))) { |
| 253 | pr_err("%s: ice reset timedout after %d ms\n", |
| 254 | mmc_hostname(host->mmc), |
| 255 | SDHCI_MSM_ICE_COMPLETION_TIMEOUT_MS); |
| 256 | return -ETIMEDOUT; |
| 257 | } |
| 258 | |
| 259 | if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) { |
| 260 | pr_err("%s: ice is in invalid state after reset %d\n", |
| 261 | mmc_hostname(host->mmc), msm_host->ice.state); |
| 262 | return -EINVAL; |
| 263 | } |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | int sdhci_msm_ice_resume(struct sdhci_host *host) |
| 268 | { |
| 269 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| 270 | struct sdhci_msm_host *msm_host = pltfm_host->priv; |
| 271 | int err = 0; |
| 272 | |
| 273 | if (msm_host->ice.state != |
| 274 | SDHCI_MSM_ICE_STATE_SUSPENDED) { |
| 275 | pr_err("%s: ice is in invalid state before resume %d\n", |
| 276 | mmc_hostname(host->mmc), msm_host->ice.state); |
| 277 | return -EINVAL; |
| 278 | } |
| 279 | |
| 280 | init_completion(&msm_host->ice.async_done); |
| 281 | |
| 282 | if (msm_host->ice.vops->resume) { |
| 283 | err = msm_host->ice.vops->resume(msm_host->ice.pdev); |
| 284 | if (err) { |
| 285 | pr_err("%s: ice resume failed %d\n", |
| 286 | mmc_hostname(host->mmc), err); |
| 287 | return err; |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | if (!wait_for_completion_timeout(&msm_host->ice.async_done, |
| 292 | msecs_to_jiffies(SDHCI_MSM_ICE_COMPLETION_TIMEOUT_MS))) { |
| 293 | pr_err("%s: ice resume timedout after %d ms\n", |
| 294 | mmc_hostname(host->mmc), |
| 295 | SDHCI_MSM_ICE_COMPLETION_TIMEOUT_MS); |
| 296 | return -ETIMEDOUT; |
| 297 | } |
| 298 | |
| 299 | if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) { |
| 300 | pr_err("%s: ice is in invalid state after resume %d\n", |
| 301 | mmc_hostname(host->mmc), msm_host->ice.state); |
| 302 | return -EINVAL; |
| 303 | } |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | int sdhci_msm_ice_suspend(struct sdhci_host *host) |
| 308 | { |
| 309 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| 310 | struct sdhci_msm_host *msm_host = pltfm_host->priv; |
| 311 | int err = 0; |
| 312 | |
| 313 | if (msm_host->ice.state != |
| 314 | SDHCI_MSM_ICE_STATE_ACTIVE) { |
| 315 | pr_err("%s: ice is in invalid state before resume %d\n", |
| 316 | mmc_hostname(host->mmc), msm_host->ice.state); |
| 317 | return -EINVAL; |
| 318 | } |
| 319 | |
| 320 | if (msm_host->ice.vops->suspend) { |
| 321 | err = msm_host->ice.vops->suspend(msm_host->ice.pdev); |
| 322 | if (err) { |
| 323 | pr_err("%s: ice suspend failed %d\n", |
| 324 | mmc_hostname(host->mmc), err); |
| 325 | return -EINVAL; |
| 326 | } |
| 327 | } |
| 328 | msm_host->ice.state = SDHCI_MSM_ICE_STATE_SUSPENDED; |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | int sdhci_msm_ice_get_status(struct sdhci_host *host, int *ice_status) |
| 333 | { |
| 334 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| 335 | struct sdhci_msm_host *msm_host = pltfm_host->priv; |
| 336 | int stat = -EINVAL; |
| 337 | |
| 338 | if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) { |
| 339 | pr_err("%s: ice is in invalid state %d\n", |
| 340 | mmc_hostname(host->mmc), msm_host->ice.state); |
| 341 | return -EINVAL; |
| 342 | } |
| 343 | |
| 344 | if (msm_host->ice.vops->status) { |
| 345 | *ice_status = 0; |
| 346 | stat = msm_host->ice.vops->status(msm_host->ice.pdev); |
| 347 | if (stat < 0) { |
| 348 | pr_err("%s: ice get sts failed %d\n", |
| 349 | mmc_hostname(host->mmc), stat); |
| 350 | return -EINVAL; |
| 351 | } |
| 352 | *ice_status = stat; |
| 353 | } |
| 354 | return 0; |
| 355 | } |