Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/mmc/host/tmio_mmc_pio.c |
| 3 | * |
| 4 | * Copyright (C) 2011 Guennadi Liakhovetski |
| 5 | * Copyright (C) 2007 Ian Molton |
| 6 | * Copyright (C) 2004 Ian Molton |
| 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 version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * Driver for the MMC / SD / SDIO IP found in: |
| 13 | * |
| 14 | * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs |
| 15 | * |
| 16 | * This driver draws mainly on scattered spec sheets, Reverse engineering |
| 17 | * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit |
| 18 | * support). (Further 4 bit support from a later datasheet). |
| 19 | * |
| 20 | * TODO: |
| 21 | * Investigate using a workqueue for PIO transfers |
| 22 | * Eliminate FIXMEs |
| 23 | * SDIO support |
| 24 | * Better Power management |
| 25 | * Handle MMC errors better |
| 26 | * double buffer support |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | #include <linux/delay.h> |
| 31 | #include <linux/device.h> |
| 32 | #include <linux/highmem.h> |
| 33 | #include <linux/interrupt.h> |
| 34 | #include <linux/io.h> |
| 35 | #include <linux/irq.h> |
| 36 | #include <linux/mfd/tmio.h> |
| 37 | #include <linux/mmc/host.h> |
Guennadi Liakhovetski | 0f506a9 | 2012-06-20 19:10:35 +0200 | [diff] [blame] | 38 | #include <linux/mmc/mmc.h> |
Guennadi Liakhovetski | fd0ea65 | 2012-04-30 23:31:57 +0200 | [diff] [blame] | 39 | #include <linux/mmc/slot-gpio.h> |
Simon Horman | cba179a | 2011-03-24 09:48:36 +0100 | [diff] [blame] | 40 | #include <linux/mmc/tmio.h> |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 41 | #include <linux/module.h> |
| 42 | #include <linux/pagemap.h> |
| 43 | #include <linux/platform_device.h> |
Rafael J. Wysocki | c419e61 | 2012-03-13 01:01:51 +0100 | [diff] [blame] | 44 | #include <linux/pm_qos.h> |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 45 | #include <linux/pm_runtime.h> |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 46 | #include <linux/regulator/consumer.h> |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 47 | #include <linux/scatterlist.h> |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 48 | #include <linux/spinlock.h> |
Guennadi Liakhovetski | e3de2be | 2012-01-06 13:06:51 +0100 | [diff] [blame] | 49 | #include <linux/workqueue.h> |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 50 | |
| 51 | #include "tmio_mmc.h" |
| 52 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 53 | void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
| 54 | { |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 55 | host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ); |
| 56 | sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
| 60 | { |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 61 | host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ); |
| 62 | sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
| 66 | { |
| 67 | sd_ctrl_write32(host, CTL_STATUS, ~i); |
| 68 | } |
| 69 | |
| 70 | static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data) |
| 71 | { |
| 72 | host->sg_len = data->sg_len; |
| 73 | host->sg_ptr = data->sg; |
| 74 | host->sg_orig = data->sg; |
| 75 | host->sg_off = 0; |
| 76 | } |
| 77 | |
| 78 | static int tmio_mmc_next_sg(struct tmio_mmc_host *host) |
| 79 | { |
| 80 | host->sg_ptr = sg_next(host->sg_ptr); |
| 81 | host->sg_off = 0; |
| 82 | return --host->sg_len; |
| 83 | } |
| 84 | |
| 85 | #ifdef CONFIG_MMC_DEBUG |
| 86 | |
| 87 | #define STATUS_TO_TEXT(a, status, i) \ |
| 88 | do { \ |
| 89 | if (status & TMIO_STAT_##a) { \ |
| 90 | if (i++) \ |
| 91 | printk(" | "); \ |
| 92 | printk(#a); \ |
| 93 | } \ |
| 94 | } while (0) |
| 95 | |
| 96 | static void pr_debug_status(u32 status) |
| 97 | { |
| 98 | int i = 0; |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 99 | pr_debug("status: %08x = ", status); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 100 | STATUS_TO_TEXT(CARD_REMOVE, status, i); |
| 101 | STATUS_TO_TEXT(CARD_INSERT, status, i); |
| 102 | STATUS_TO_TEXT(SIGSTATE, status, i); |
| 103 | STATUS_TO_TEXT(WRPROTECT, status, i); |
| 104 | STATUS_TO_TEXT(CARD_REMOVE_A, status, i); |
| 105 | STATUS_TO_TEXT(CARD_INSERT_A, status, i); |
| 106 | STATUS_TO_TEXT(SIGSTATE_A, status, i); |
| 107 | STATUS_TO_TEXT(CMD_IDX_ERR, status, i); |
| 108 | STATUS_TO_TEXT(STOPBIT_ERR, status, i); |
| 109 | STATUS_TO_TEXT(ILL_FUNC, status, i); |
| 110 | STATUS_TO_TEXT(CMD_BUSY, status, i); |
| 111 | STATUS_TO_TEXT(CMDRESPEND, status, i); |
| 112 | STATUS_TO_TEXT(DATAEND, status, i); |
| 113 | STATUS_TO_TEXT(CRCFAIL, status, i); |
| 114 | STATUS_TO_TEXT(DATATIMEOUT, status, i); |
| 115 | STATUS_TO_TEXT(CMDTIMEOUT, status, i); |
| 116 | STATUS_TO_TEXT(RXOVERFLOW, status, i); |
| 117 | STATUS_TO_TEXT(TXUNDERRUN, status, i); |
| 118 | STATUS_TO_TEXT(RXRDY, status, i); |
| 119 | STATUS_TO_TEXT(TXRQ, status, i); |
| 120 | STATUS_TO_TEXT(ILL_ACCESS, status, i); |
| 121 | printk("\n"); |
| 122 | } |
| 123 | |
| 124 | #else |
| 125 | #define pr_debug_status(s) do { } while (0) |
| 126 | #endif |
| 127 | |
| 128 | static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) |
| 129 | { |
| 130 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 131 | |
| 132 | if (enable) { |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 133 | host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & |
| 134 | ~TMIO_SDIO_STAT_IOIRQ; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 135 | sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001); |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 136 | sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 137 | } else { |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 138 | host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; |
| 139 | sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 140 | sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 141 | } |
| 142 | } |
| 143 | |
| 144 | static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock) |
| 145 | { |
| 146 | u32 clk = 0, clock; |
| 147 | |
| 148 | if (new_clock) { |
| 149 | for (clock = host->mmc->f_min, clk = 0x80000080; |
| 150 | new_clock >= (clock<<1); clk >>= 1) |
| 151 | clock <<= 1; |
| 152 | clk |= 0x100; |
| 153 | } |
| 154 | |
| 155 | if (host->set_clk_div) |
| 156 | host->set_clk_div(host->pdev, (clk>>22) & 1); |
| 157 | |
| 158 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff); |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 159 | msleep(10); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) |
| 163 | { |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 164 | /* implicit BUG_ON(!res) */ |
Kuninori Morimoto | 5d60e50 | 2013-11-20 00:31:06 -0800 | [diff] [blame] | 165 | if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 166 | sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000); |
| 167 | msleep(10); |
| 168 | } |
Guennadi Liakhovetski | d9b0342 | 2011-03-10 18:43:07 +0100 | [diff] [blame] | 169 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 170 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 & |
| 171 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); |
| 172 | msleep(10); |
| 173 | } |
| 174 | |
| 175 | static void tmio_mmc_clk_start(struct tmio_mmc_host *host) |
| 176 | { |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 177 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 | |
| 178 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); |
| 179 | msleep(10); |
Guennadi Liakhovetski | d9b0342 | 2011-03-10 18:43:07 +0100 | [diff] [blame] | 180 | |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 181 | /* implicit BUG_ON(!res) */ |
Kuninori Morimoto | 5d60e50 | 2013-11-20 00:31:06 -0800 | [diff] [blame] | 182 | if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 183 | sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100); |
| 184 | msleep(10); |
| 185 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | static void tmio_mmc_reset(struct tmio_mmc_host *host) |
| 189 | { |
| 190 | /* FIXME - should we set stop clock reg here */ |
| 191 | sd_ctrl_write16(host, CTL_RESET_SD, 0x0000); |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 192 | /* implicit BUG_ON(!res) */ |
Kuninori Morimoto | 5d60e50 | 2013-11-20 00:31:06 -0800 | [diff] [blame] | 193 | if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 194 | sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 195 | msleep(10); |
| 196 | sd_ctrl_write16(host, CTL_RESET_SD, 0x0001); |
Kuninori Morimoto | 5d60e50 | 2013-11-20 00:31:06 -0800 | [diff] [blame] | 197 | if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 198 | sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 199 | msleep(10); |
| 200 | } |
| 201 | |
| 202 | static void tmio_mmc_reset_work(struct work_struct *work) |
| 203 | { |
| 204 | struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, |
| 205 | delayed_reset_work.work); |
| 206 | struct mmc_request *mrq; |
| 207 | unsigned long flags; |
| 208 | |
| 209 | spin_lock_irqsave(&host->lock, flags); |
| 210 | mrq = host->mrq; |
| 211 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 212 | /* |
| 213 | * is request already finished? Since we use a non-blocking |
| 214 | * cancel_delayed_work(), it can happen, that a .set_ios() call preempts |
| 215 | * us, so, have to check for IS_ERR(host->mrq) |
| 216 | */ |
| 217 | if (IS_ERR_OR_NULL(mrq) |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 218 | || time_is_after_jiffies(host->last_req_ts + |
| 219 | msecs_to_jiffies(2000))) { |
| 220 | spin_unlock_irqrestore(&host->lock, flags); |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | dev_warn(&host->pdev->dev, |
| 225 | "timeout waiting for hardware interrupt (CMD%u)\n", |
| 226 | mrq->cmd->opcode); |
| 227 | |
| 228 | if (host->data) |
| 229 | host->data->error = -ETIMEDOUT; |
| 230 | else if (host->cmd) |
| 231 | host->cmd->error = -ETIMEDOUT; |
| 232 | else |
| 233 | mrq->cmd->error = -ETIMEDOUT; |
| 234 | |
| 235 | host->cmd = NULL; |
| 236 | host->data = NULL; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 237 | host->force_pio = false; |
| 238 | |
| 239 | spin_unlock_irqrestore(&host->lock, flags); |
| 240 | |
| 241 | tmio_mmc_reset(host); |
| 242 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 243 | /* Ready for new calls */ |
| 244 | host->mrq = NULL; |
| 245 | |
Guennadi Liakhovetski | e3de2be | 2012-01-06 13:06:51 +0100 | [diff] [blame] | 246 | tmio_mmc_abort_dma(host); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 247 | mmc_request_done(host->mmc, mrq); |
| 248 | } |
| 249 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 250 | /* called with host->lock held, interrupts disabled */ |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 251 | static void tmio_mmc_finish_request(struct tmio_mmc_host *host) |
| 252 | { |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 253 | struct mmc_request *mrq; |
| 254 | unsigned long flags; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 255 | |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 256 | spin_lock_irqsave(&host->lock, flags); |
| 257 | |
| 258 | mrq = host->mrq; |
| 259 | if (IS_ERR_OR_NULL(mrq)) { |
| 260 | spin_unlock_irqrestore(&host->lock, flags); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 261 | return; |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 262 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 263 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 264 | host->cmd = NULL; |
| 265 | host->data = NULL; |
| 266 | host->force_pio = false; |
| 267 | |
| 268 | cancel_delayed_work(&host->delayed_reset_work); |
| 269 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 270 | host->mrq = NULL; |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 271 | spin_unlock_irqrestore(&host->lock, flags); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 272 | |
Guennadi Liakhovetski | e3de2be | 2012-01-06 13:06:51 +0100 | [diff] [blame] | 273 | if (mrq->cmd->error || (mrq->data && mrq->data->error)) |
| 274 | tmio_mmc_abort_dma(host); |
| 275 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 276 | mmc_request_done(host->mmc, mrq); |
| 277 | } |
| 278 | |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 279 | static void tmio_mmc_done_work(struct work_struct *work) |
| 280 | { |
| 281 | struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, |
| 282 | done); |
| 283 | tmio_mmc_finish_request(host); |
| 284 | } |
| 285 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 286 | /* These are the bitmasks the tmio chip requires to implement the MMC response |
| 287 | * types. Note that R1 and R6 are the same in this scheme. */ |
| 288 | #define APP_CMD 0x0040 |
| 289 | #define RESP_NONE 0x0300 |
| 290 | #define RESP_R1 0x0400 |
| 291 | #define RESP_R1B 0x0500 |
| 292 | #define RESP_R2 0x0600 |
| 293 | #define RESP_R3 0x0700 |
| 294 | #define DATA_PRESENT 0x0800 |
| 295 | #define TRANSFER_READ 0x1000 |
| 296 | #define TRANSFER_MULTI 0x2000 |
| 297 | #define SECURITY_CMD 0x4000 |
| 298 | |
| 299 | static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd) |
| 300 | { |
| 301 | struct mmc_data *data = host->data; |
| 302 | int c = cmd->opcode; |
Guennadi Liakhovetski | e23cd53 | 2012-02-22 13:16:09 +0100 | [diff] [blame] | 303 | u32 irq_mask = TMIO_MASK_CMD; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 304 | |
Guennadi Liakhovetski | 0f506a9 | 2012-06-20 19:10:35 +0200 | [diff] [blame] | 305 | /* CMD12 is handled by hardware */ |
| 306 | if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) { |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 307 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001); |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | switch (mmc_resp_type(cmd)) { |
| 312 | case MMC_RSP_NONE: c |= RESP_NONE; break; |
| 313 | case MMC_RSP_R1: c |= RESP_R1; break; |
| 314 | case MMC_RSP_R1B: c |= RESP_R1B; break; |
| 315 | case MMC_RSP_R2: c |= RESP_R2; break; |
| 316 | case MMC_RSP_R3: c |= RESP_R3; break; |
| 317 | default: |
| 318 | pr_debug("Unknown response type %d\n", mmc_resp_type(cmd)); |
| 319 | return -EINVAL; |
| 320 | } |
| 321 | |
| 322 | host->cmd = cmd; |
| 323 | |
| 324 | /* FIXME - this seems to be ok commented out but the spec suggest this bit |
| 325 | * should be set when issuing app commands. |
| 326 | * if(cmd->flags & MMC_FLAG_ACMD) |
| 327 | * c |= APP_CMD; |
| 328 | */ |
| 329 | if (data) { |
| 330 | c |= DATA_PRESENT; |
| 331 | if (data->blocks > 1) { |
| 332 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100); |
| 333 | c |= TRANSFER_MULTI; |
| 334 | } |
| 335 | if (data->flags & MMC_DATA_READ) |
| 336 | c |= TRANSFER_READ; |
| 337 | } |
| 338 | |
Guennadi Liakhovetski | e23cd53 | 2012-02-22 13:16:09 +0100 | [diff] [blame] | 339 | if (!host->native_hotplug) |
| 340 | irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); |
| 341 | tmio_mmc_enable_mmc_irqs(host, irq_mask); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 342 | |
| 343 | /* Fire off the command */ |
| 344 | sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg); |
| 345 | sd_ctrl_write16(host, CTL_SD_CMD, c); |
| 346 | |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * This chip always returns (at least?) as much data as you ask for. |
| 352 | * I'm unsure what happens if you ask for less than a block. This should be |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 353 | * looked into to ensure that a funny length read doesn't hose the controller. |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 354 | */ |
| 355 | static void tmio_mmc_pio_irq(struct tmio_mmc_host *host) |
| 356 | { |
| 357 | struct mmc_data *data = host->data; |
| 358 | void *sg_virt; |
| 359 | unsigned short *buf; |
| 360 | unsigned int count; |
| 361 | unsigned long flags; |
| 362 | |
| 363 | if ((host->chan_tx || host->chan_rx) && !host->force_pio) { |
| 364 | pr_err("PIO IRQ in DMA mode!\n"); |
| 365 | return; |
| 366 | } else if (!data) { |
| 367 | pr_debug("Spurious PIO IRQ\n"); |
| 368 | return; |
| 369 | } |
| 370 | |
| 371 | sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags); |
| 372 | buf = (unsigned short *)(sg_virt + host->sg_off); |
| 373 | |
| 374 | count = host->sg_ptr->length - host->sg_off; |
| 375 | if (count > data->blksz) |
| 376 | count = data->blksz; |
| 377 | |
| 378 | pr_debug("count: %08x offset: %08x flags %08x\n", |
| 379 | count, host->sg_off, data->flags); |
| 380 | |
| 381 | /* Transfer the data */ |
| 382 | if (data->flags & MMC_DATA_READ) |
| 383 | sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); |
| 384 | else |
| 385 | sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); |
| 386 | |
| 387 | host->sg_off += count; |
| 388 | |
| 389 | tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt); |
| 390 | |
| 391 | if (host->sg_off == host->sg_ptr->length) |
| 392 | tmio_mmc_next_sg(host); |
| 393 | |
| 394 | return; |
| 395 | } |
| 396 | |
| 397 | static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host) |
| 398 | { |
| 399 | if (host->sg_ptr == &host->bounce_sg) { |
| 400 | unsigned long flags; |
| 401 | void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags); |
| 402 | memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length); |
| 403 | tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr); |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | /* needs to be called with host->lock held */ |
| 408 | void tmio_mmc_do_data_irq(struct tmio_mmc_host *host) |
| 409 | { |
| 410 | struct mmc_data *data = host->data; |
| 411 | struct mmc_command *stop; |
| 412 | |
| 413 | host->data = NULL; |
| 414 | |
| 415 | if (!data) { |
| 416 | dev_warn(&host->pdev->dev, "Spurious data end IRQ\n"); |
| 417 | return; |
| 418 | } |
| 419 | stop = data->stop; |
| 420 | |
| 421 | /* FIXME - return correct transfer count on errors */ |
| 422 | if (!data->error) |
| 423 | data->bytes_xfered = data->blocks * data->blksz; |
| 424 | else |
| 425 | data->bytes_xfered = 0; |
| 426 | |
| 427 | pr_debug("Completed data request\n"); |
| 428 | |
| 429 | /* |
| 430 | * FIXME: other drivers allow an optional stop command of any given type |
| 431 | * which we dont do, as the chip can auto generate them. |
| 432 | * Perhaps we can be smarter about when to use auto CMD12 and |
| 433 | * only issue the auto request when we know this is the desired |
| 434 | * stop command, allowing fallback to the stop command the |
| 435 | * upper layers expect. For now, we do what works. |
| 436 | */ |
| 437 | |
| 438 | if (data->flags & MMC_DATA_READ) { |
| 439 | if (host->chan_rx && !host->force_pio) |
| 440 | tmio_mmc_check_bounce_buffer(host); |
| 441 | dev_dbg(&host->pdev->dev, "Complete Rx request %p\n", |
| 442 | host->mrq); |
| 443 | } else { |
| 444 | dev_dbg(&host->pdev->dev, "Complete Tx request %p\n", |
| 445 | host->mrq); |
| 446 | } |
| 447 | |
| 448 | if (stop) { |
Guennadi Liakhovetski | 0f506a9 | 2012-06-20 19:10:35 +0200 | [diff] [blame] | 449 | if (stop->opcode == MMC_STOP_TRANSMISSION && !stop->arg) |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 450 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000); |
| 451 | else |
| 452 | BUG(); |
| 453 | } |
| 454 | |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 455 | schedule_work(&host->done); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | static void tmio_mmc_data_irq(struct tmio_mmc_host *host) |
| 459 | { |
| 460 | struct mmc_data *data; |
| 461 | spin_lock(&host->lock); |
| 462 | data = host->data; |
| 463 | |
| 464 | if (!data) |
| 465 | goto out; |
| 466 | |
| 467 | if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) { |
| 468 | /* |
| 469 | * Has all data been written out yet? Testing on SuperH showed, |
| 470 | * that in most cases the first interrupt comes already with the |
| 471 | * BUSY status bit clear, but on some operations, like mount or |
| 472 | * in the beginning of a write / sync / umount, there is one |
| 473 | * DATAEND interrupt with the BUSY bit set, in this cases |
| 474 | * waiting for one more interrupt fixes the problem. |
| 475 | */ |
| 476 | if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) { |
| 477 | tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); |
| 478 | tasklet_schedule(&host->dma_complete); |
| 479 | } |
| 480 | } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) { |
| 481 | tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); |
| 482 | tasklet_schedule(&host->dma_complete); |
| 483 | } else { |
| 484 | tmio_mmc_do_data_irq(host); |
| 485 | tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP); |
| 486 | } |
| 487 | out: |
| 488 | spin_unlock(&host->lock); |
| 489 | } |
| 490 | |
| 491 | static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, |
| 492 | unsigned int stat) |
| 493 | { |
| 494 | struct mmc_command *cmd = host->cmd; |
| 495 | int i, addr; |
| 496 | |
| 497 | spin_lock(&host->lock); |
| 498 | |
| 499 | if (!host->cmd) { |
| 500 | pr_debug("Spurious CMD irq\n"); |
| 501 | goto out; |
| 502 | } |
| 503 | |
| 504 | host->cmd = NULL; |
| 505 | |
| 506 | /* This controller is sicker than the PXA one. Not only do we need to |
| 507 | * drop the top 8 bits of the first response word, we also need to |
| 508 | * modify the order of the response for short response command types. |
| 509 | */ |
| 510 | |
| 511 | for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4) |
| 512 | cmd->resp[i] = sd_ctrl_read32(host, addr); |
| 513 | |
| 514 | if (cmd->flags & MMC_RSP_136) { |
| 515 | cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24); |
| 516 | cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24); |
| 517 | cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24); |
| 518 | cmd->resp[3] <<= 8; |
| 519 | } else if (cmd->flags & MMC_RSP_R3) { |
| 520 | cmd->resp[0] = cmd->resp[3]; |
| 521 | } |
| 522 | |
| 523 | if (stat & TMIO_STAT_CMDTIMEOUT) |
| 524 | cmd->error = -ETIMEDOUT; |
| 525 | else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) |
| 526 | cmd->error = -EILSEQ; |
| 527 | |
| 528 | /* If there is data to handle we enable data IRQs here, and |
| 529 | * we will ultimatley finish the request in the data_end handler. |
| 530 | * If theres no data or we encountered an error, finish now. |
| 531 | */ |
| 532 | if (host->data && !cmd->error) { |
| 533 | if (host->data->flags & MMC_DATA_READ) { |
| 534 | if (host->force_pio || !host->chan_rx) |
| 535 | tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP); |
| 536 | else |
| 537 | tasklet_schedule(&host->dma_issue); |
| 538 | } else { |
| 539 | if (host->force_pio || !host->chan_tx) |
| 540 | tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP); |
| 541 | else |
| 542 | tasklet_schedule(&host->dma_issue); |
| 543 | } |
| 544 | } else { |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 545 | schedule_work(&host->done); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | out: |
| 549 | spin_unlock(&host->lock); |
| 550 | } |
| 551 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 552 | static void tmio_mmc_card_irq_status(struct tmio_mmc_host *host, |
| 553 | int *ireg, int *status) |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 554 | { |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 555 | *status = sd_ctrl_read32(host, CTL_STATUS); |
| 556 | *ireg = *status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask; |
| 557 | |
| 558 | pr_debug_status(*status); |
| 559 | pr_debug_status(*ireg); |
| 560 | } |
| 561 | |
| 562 | static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host, |
| 563 | int ireg, int status) |
| 564 | { |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 565 | struct mmc_host *mmc = host->mmc; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 566 | |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 567 | /* Card insert / remove attempts */ |
| 568 | if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) { |
| 569 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT | |
| 570 | TMIO_STAT_CARD_REMOVE); |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 571 | if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) || |
| 572 | ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) && |
| 573 | !work_pending(&mmc->detect.work)) |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 574 | mmc_detect_change(host->mmc, msecs_to_jiffies(100)); |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 575 | return true; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 576 | } |
| 577 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 578 | return false; |
| 579 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 580 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 581 | irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid) |
| 582 | { |
| 583 | unsigned int ireg, status; |
| 584 | struct tmio_mmc_host *host = devid; |
| 585 | |
| 586 | tmio_mmc_card_irq_status(host, &ireg, &status); |
| 587 | __tmio_mmc_card_detect_irq(host, ireg, status); |
| 588 | |
| 589 | return IRQ_HANDLED; |
| 590 | } |
| 591 | EXPORT_SYMBOL(tmio_mmc_card_detect_irq); |
| 592 | |
| 593 | static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host, |
| 594 | int ireg, int status) |
| 595 | { |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 596 | /* Command completion */ |
| 597 | if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) { |
| 598 | tmio_mmc_ack_mmc_irqs(host, |
| 599 | TMIO_STAT_CMDRESPEND | |
| 600 | TMIO_STAT_CMDTIMEOUT); |
| 601 | tmio_mmc_cmd_irq(host, status); |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 602 | return true; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 603 | } |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 604 | |
| 605 | /* Data transfer */ |
| 606 | if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) { |
| 607 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ); |
| 608 | tmio_mmc_pio_irq(host); |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 609 | return true; |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 610 | } |
| 611 | |
| 612 | /* Data transfer completion */ |
| 613 | if (ireg & TMIO_STAT_DATAEND) { |
| 614 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND); |
| 615 | tmio_mmc_data_irq(host); |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 616 | return true; |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 617 | } |
| 618 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 619 | return false; |
| 620 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 621 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 622 | irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid) |
| 623 | { |
| 624 | unsigned int ireg, status; |
| 625 | struct tmio_mmc_host *host = devid; |
| 626 | |
| 627 | tmio_mmc_card_irq_status(host, &ireg, &status); |
| 628 | __tmio_mmc_sdcard_irq(host, ireg, status); |
| 629 | |
| 630 | return IRQ_HANDLED; |
| 631 | } |
| 632 | EXPORT_SYMBOL(tmio_mmc_sdcard_irq); |
| 633 | |
| 634 | irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid) |
| 635 | { |
| 636 | struct tmio_mmc_host *host = devid; |
| 637 | struct mmc_host *mmc = host->mmc; |
| 638 | struct tmio_mmc_data *pdata = host->pdata; |
| 639 | unsigned int ireg, status; |
| 640 | |
| 641 | if (!(pdata->flags & TMIO_MMC_SDIO_IRQ)) |
| 642 | return IRQ_HANDLED; |
| 643 | |
| 644 | status = sd_ctrl_read16(host, CTL_SDIO_STATUS); |
| 645 | ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask; |
| 646 | |
| 647 | sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL); |
| 648 | |
| 649 | if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ) |
| 650 | mmc_signal_sdio_irq(mmc); |
| 651 | |
| 652 | return IRQ_HANDLED; |
| 653 | } |
| 654 | EXPORT_SYMBOL(tmio_mmc_sdio_irq); |
| 655 | |
| 656 | irqreturn_t tmio_mmc_irq(int irq, void *devid) |
| 657 | { |
| 658 | struct tmio_mmc_host *host = devid; |
| 659 | unsigned int ireg, status; |
| 660 | |
| 661 | pr_debug("MMC IRQ begin\n"); |
| 662 | |
| 663 | tmio_mmc_card_irq_status(host, &ireg, &status); |
| 664 | if (__tmio_mmc_card_detect_irq(host, ireg, status)) |
| 665 | return IRQ_HANDLED; |
| 666 | if (__tmio_mmc_sdcard_irq(host, ireg, status)) |
| 667 | return IRQ_HANDLED; |
| 668 | |
| 669 | tmio_mmc_sdio_irq(irq, devid); |
| 670 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 671 | return IRQ_HANDLED; |
| 672 | } |
Magnus Damm | 8e7bfdb | 2011-05-06 11:02:33 +0000 | [diff] [blame] | 673 | EXPORT_SYMBOL(tmio_mmc_irq); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 674 | |
| 675 | static int tmio_mmc_start_data(struct tmio_mmc_host *host, |
| 676 | struct mmc_data *data) |
| 677 | { |
| 678 | struct tmio_mmc_data *pdata = host->pdata; |
| 679 | |
| 680 | pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n", |
| 681 | data->blksz, data->blocks); |
| 682 | |
| 683 | /* Some hardware cannot perform 2 byte requests in 4 bit mode */ |
| 684 | if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) { |
| 685 | int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES; |
| 686 | |
| 687 | if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) { |
| 688 | pr_err("%s: %d byte block unsupported in 4 bit mode\n", |
| 689 | mmc_hostname(host->mmc), data->blksz); |
| 690 | return -EINVAL; |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | tmio_mmc_init_sg(host, data); |
| 695 | host->data = data; |
| 696 | |
| 697 | /* Set transfer length / blocksize */ |
| 698 | sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz); |
| 699 | sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks); |
| 700 | |
| 701 | tmio_mmc_start_dma(host, data); |
| 702 | |
| 703 | return 0; |
| 704 | } |
| 705 | |
| 706 | /* Process requests from the MMC layer */ |
| 707 | static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) |
| 708 | { |
| 709 | struct tmio_mmc_host *host = mmc_priv(mmc); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 710 | unsigned long flags; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 711 | int ret; |
| 712 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 713 | spin_lock_irqsave(&host->lock, flags); |
| 714 | |
| 715 | if (host->mrq) { |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 716 | pr_debug("request not null\n"); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 717 | if (IS_ERR(host->mrq)) { |
| 718 | spin_unlock_irqrestore(&host->lock, flags); |
| 719 | mrq->cmd->error = -EAGAIN; |
| 720 | mmc_request_done(mmc, mrq); |
| 721 | return; |
| 722 | } |
| 723 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 724 | |
| 725 | host->last_req_ts = jiffies; |
| 726 | wmb(); |
| 727 | host->mrq = mrq; |
| 728 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 729 | spin_unlock_irqrestore(&host->lock, flags); |
| 730 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 731 | if (mrq->data) { |
| 732 | ret = tmio_mmc_start_data(host, mrq->data); |
| 733 | if (ret) |
| 734 | goto fail; |
| 735 | } |
| 736 | |
| 737 | ret = tmio_mmc_start_command(host, mrq->cmd); |
| 738 | if (!ret) { |
| 739 | schedule_delayed_work(&host->delayed_reset_work, |
| 740 | msecs_to_jiffies(2000)); |
| 741 | return; |
| 742 | } |
| 743 | |
| 744 | fail: |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 745 | host->force_pio = false; |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 746 | host->mrq = NULL; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 747 | mrq->cmd->error = ret; |
| 748 | mmc_request_done(mmc, mrq); |
| 749 | } |
| 750 | |
Guennadi Liakhovetski | 8c102a9 | 2012-06-20 19:10:31 +0200 | [diff] [blame] | 751 | static int tmio_mmc_clk_update(struct mmc_host *mmc) |
| 752 | { |
| 753 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 754 | struct tmio_mmc_data *pdata = host->pdata; |
| 755 | int ret; |
| 756 | |
| 757 | if (!pdata->clk_enable) |
| 758 | return -ENOTSUPP; |
| 759 | |
| 760 | ret = pdata->clk_enable(host->pdev, &mmc->f_max); |
| 761 | if (!ret) |
| 762 | mmc->f_min = mmc->f_max / 512; |
| 763 | |
| 764 | return ret; |
| 765 | } |
| 766 | |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 767 | static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd) |
| 768 | { |
| 769 | struct mmc_host *mmc = host->mmc; |
| 770 | int ret = 0; |
| 771 | |
| 772 | /* .set_ios() is returning void, so, no chance to report an error */ |
| 773 | |
Chris Ball | 9d731e7 | 2013-09-06 07:29:05 -0400 | [diff] [blame] | 774 | if (host->set_pwr) |
| 775 | host->set_pwr(host->pdev, 1); |
| 776 | |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 777 | if (!IS_ERR(mmc->supply.vmmc)) { |
| 778 | ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); |
| 779 | /* |
| 780 | * Attention: empiric value. With a b43 WiFi SDIO card this |
| 781 | * delay proved necessary for reliable card-insertion probing. |
| 782 | * 100us were not enough. Is this the same 140us delay, as in |
| 783 | * tmio_mmc_set_ios()? |
| 784 | */ |
| 785 | udelay(200); |
| 786 | } |
| 787 | /* |
| 788 | * It seems, VccQ should be switched on after Vcc, this is also what the |
| 789 | * omap_hsmmc.c driver does. |
| 790 | */ |
| 791 | if (!IS_ERR(mmc->supply.vqmmc) && !ret) { |
Guennadi Liakhovetski | 6d1d6b4 | 2013-07-08 11:38:09 +0200 | [diff] [blame] | 792 | ret = regulator_enable(mmc->supply.vqmmc); |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 793 | udelay(200); |
| 794 | } |
Guennadi Liakhovetski | 6d1d6b4 | 2013-07-08 11:38:09 +0200 | [diff] [blame] | 795 | |
| 796 | if (ret < 0) |
| 797 | dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n", |
| 798 | ret); |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | static void tmio_mmc_power_off(struct tmio_mmc_host *host) |
Guennadi Liakhovetski | b958a67 | 2012-06-20 19:10:33 +0200 | [diff] [blame] | 802 | { |
| 803 | struct mmc_host *mmc = host->mmc; |
| 804 | |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 805 | if (!IS_ERR(mmc->supply.vqmmc)) |
| 806 | regulator_disable(mmc->supply.vqmmc); |
| 807 | |
Guennadi Liakhovetski | b958a67 | 2012-06-20 19:10:33 +0200 | [diff] [blame] | 808 | if (!IS_ERR(mmc->supply.vmmc)) |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 809 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); |
Chris Ball | 9d731e7 | 2013-09-06 07:29:05 -0400 | [diff] [blame] | 810 | |
| 811 | if (host->set_pwr) |
| 812 | host->set_pwr(host->pdev, 0); |
Guennadi Liakhovetski | b958a67 | 2012-06-20 19:10:33 +0200 | [diff] [blame] | 813 | } |
| 814 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 815 | /* Set MMC clock / power. |
| 816 | * Note: This controller uses a simple divider scheme therefore it cannot |
| 817 | * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as |
| 818 | * MMC wont run that fast, it has to be clocked at 12MHz which is the next |
| 819 | * slowest setting. |
| 820 | */ |
| 821 | static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
| 822 | { |
| 823 | struct tmio_mmc_host *host = mmc_priv(mmc); |
Guennadi Liakhovetski | 4932bd6 | 2012-02-09 22:57:16 +0100 | [diff] [blame] | 824 | struct device *dev = &host->pdev->dev; |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 825 | unsigned long flags; |
| 826 | |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 827 | mutex_lock(&host->ios_lock); |
| 828 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 829 | spin_lock_irqsave(&host->lock, flags); |
| 830 | if (host->mrq) { |
| 831 | if (IS_ERR(host->mrq)) { |
Guennadi Liakhovetski | 4932bd6 | 2012-02-09 22:57:16 +0100 | [diff] [blame] | 832 | dev_dbg(dev, |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 833 | "%s.%d: concurrent .set_ios(), clk %u, mode %u\n", |
| 834 | current->comm, task_pid_nr(current), |
| 835 | ios->clock, ios->power_mode); |
| 836 | host->mrq = ERR_PTR(-EINTR); |
| 837 | } else { |
Guennadi Liakhovetski | 4932bd6 | 2012-02-09 22:57:16 +0100 | [diff] [blame] | 838 | dev_dbg(dev, |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 839 | "%s.%d: CMD%u active since %lu, now %lu!\n", |
| 840 | current->comm, task_pid_nr(current), |
| 841 | host->mrq->cmd->opcode, host->last_req_ts, jiffies); |
| 842 | } |
| 843 | spin_unlock_irqrestore(&host->lock, flags); |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 844 | |
| 845 | mutex_unlock(&host->ios_lock); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 846 | return; |
| 847 | } |
| 848 | |
| 849 | host->mrq = ERR_PTR(-EBUSY); |
| 850 | |
| 851 | spin_unlock_irqrestore(&host->lock, flags); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 852 | |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 853 | /* |
Guennadi Liakhovetski | c391e1b | 2012-02-09 22:57:13 +0100 | [diff] [blame] | 854 | * host->power toggles between false and true in both cases - either |
Guennadi Liakhovetski | c8be24c | 2012-02-09 22:57:09 +0100 | [diff] [blame] | 855 | * or not the controller can be runtime-suspended during inactivity. |
| 856 | * But if the controller has to be kept on, the runtime-pm usage_count |
| 857 | * is kept positive, so no suspending actually takes place. |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 858 | */ |
| 859 | if (ios->power_mode == MMC_POWER_ON && ios->clock) { |
Guennadi Liakhovetski | e83b7a8 | 2013-06-06 16:35:44 +0200 | [diff] [blame] | 860 | if (host->power != TMIO_MMC_ON_RUN) { |
Guennadi Liakhovetski | 8c102a9 | 2012-06-20 19:10:31 +0200 | [diff] [blame] | 861 | tmio_mmc_clk_update(mmc); |
Guennadi Liakhovetski | 4932bd6 | 2012-02-09 22:57:16 +0100 | [diff] [blame] | 862 | pm_runtime_get_sync(dev); |
Guennadi Liakhovetski | b22ffdc | 2013-04-22 10:29:26 +0200 | [diff] [blame] | 863 | if (host->resuming) { |
| 864 | tmio_mmc_reset(host); |
| 865 | host->resuming = false; |
| 866 | } |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 867 | } |
Guennadi Liakhovetski | b9ec274 | 2013-06-06 16:35:48 +0200 | [diff] [blame] | 868 | if (host->power == TMIO_MMC_OFF_STOP) |
| 869 | tmio_mmc_reset(host); |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 870 | tmio_mmc_set_clock(host, ios->clock); |
Guennadi Liakhovetski | e83b7a8 | 2013-06-06 16:35:44 +0200 | [diff] [blame] | 871 | if (host->power == TMIO_MMC_OFF_STOP) |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 872 | /* power up SD card and the bus */ |
| 873 | tmio_mmc_power_on(host, ios->vdd); |
Guennadi Liakhovetski | e83b7a8 | 2013-06-06 16:35:44 +0200 | [diff] [blame] | 874 | host->power = TMIO_MMC_ON_RUN; |
Guennadi Liakhovetski | 5fd0157 | 2011-03-09 14:45:44 +0100 | [diff] [blame] | 875 | /* start bus clock */ |
| 876 | tmio_mmc_clk_start(host); |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 877 | } else if (ios->power_mode != MMC_POWER_UP) { |
Guennadi Liakhovetski | e83b7a8 | 2013-06-06 16:35:44 +0200 | [diff] [blame] | 878 | struct tmio_mmc_data *pdata = host->pdata; |
| 879 | unsigned int old_power = host->power; |
| 880 | |
| 881 | if (old_power != TMIO_MMC_OFF_STOP) { |
| 882 | if (ios->power_mode == MMC_POWER_OFF) { |
Guennadi Liakhovetski | 619b08d | 2013-02-15 16:14:00 +0100 | [diff] [blame] | 883 | tmio_mmc_power_off(host); |
Guennadi Liakhovetski | e83b7a8 | 2013-06-06 16:35:44 +0200 | [diff] [blame] | 884 | host->power = TMIO_MMC_OFF_STOP; |
| 885 | } else { |
| 886 | host->power = TMIO_MMC_ON_STOP; |
| 887 | } |
| 888 | } |
| 889 | |
| 890 | if (old_power == TMIO_MMC_ON_RUN) { |
Laurent Pinchart | 6de707f | 2012-06-12 23:29:35 +0200 | [diff] [blame] | 891 | tmio_mmc_clk_stop(host); |
Guennadi Liakhovetski | 4932bd6 | 2012-02-09 22:57:16 +0100 | [diff] [blame] | 892 | pm_runtime_put(dev); |
Guennadi Liakhovetski | 8c102a9 | 2012-06-20 19:10:31 +0200 | [diff] [blame] | 893 | if (pdata->clk_disable) |
| 894 | pdata->clk_disable(host->pdev); |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 895 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 896 | } |
| 897 | |
Guennadi Liakhovetski | e83b7a8 | 2013-06-06 16:35:44 +0200 | [diff] [blame] | 898 | if (host->power != TMIO_MMC_OFF_STOP) { |
Laurent Pinchart | 6de707f | 2012-06-12 23:29:35 +0200 | [diff] [blame] | 899 | switch (ios->bus_width) { |
| 900 | case MMC_BUS_WIDTH_1: |
| 901 | sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0); |
| 902 | break; |
| 903 | case MMC_BUS_WIDTH_4: |
| 904 | sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0); |
| 905 | break; |
| 906 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | /* Let things settle. delay taken from winCE driver */ |
| 910 | udelay(140); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 911 | if (PTR_ERR(host->mrq) == -EINTR) |
| 912 | dev_dbg(&host->pdev->dev, |
| 913 | "%s.%d: IOS interrupted: clk %u, mode %u", |
| 914 | current->comm, task_pid_nr(current), |
| 915 | ios->clock, ios->power_mode); |
| 916 | host->mrq = NULL; |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 917 | |
| 918 | mutex_unlock(&host->ios_lock); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 919 | } |
| 920 | |
| 921 | static int tmio_mmc_get_ro(struct mmc_host *mmc) |
| 922 | { |
| 923 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 924 | struct tmio_mmc_data *pdata = host->pdata; |
Guennadi Liakhovetski | 3071caf | 2012-05-01 17:11:56 +0200 | [diff] [blame] | 925 | int ret = mmc_gpio_get_ro(mmc); |
| 926 | if (ret >= 0) |
| 927 | return ret; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 928 | |
Guennadi Liakhovetski | 7d8b4c2 | 2011-06-20 16:51:10 +0200 | [diff] [blame] | 929 | return !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) || |
| 930 | (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 931 | } |
| 932 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 933 | static const struct mmc_host_ops tmio_mmc_ops = { |
| 934 | .request = tmio_mmc_request, |
| 935 | .set_ios = tmio_mmc_set_ios, |
| 936 | .get_ro = tmio_mmc_get_ro, |
Laurent Pinchart | 2b63b34 | 2013-08-08 12:38:43 +0200 | [diff] [blame] | 937 | .get_cd = mmc_gpio_get_cd, |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 938 | .enable_sdio_irq = tmio_mmc_enable_sdio_irq, |
| 939 | }; |
| 940 | |
Kuninori Morimoto | 05fae4a | 2013-11-20 00:30:39 -0800 | [diff] [blame] | 941 | static int tmio_mmc_init_ocr(struct tmio_mmc_host *host) |
Guennadi Liakhovetski | b958a67 | 2012-06-20 19:10:33 +0200 | [diff] [blame] | 942 | { |
| 943 | struct tmio_mmc_data *pdata = host->pdata; |
| 944 | struct mmc_host *mmc = host->mmc; |
| 945 | |
| 946 | mmc_regulator_get_supply(mmc); |
| 947 | |
Kuninori Morimoto | 05fae4a | 2013-11-20 00:30:39 -0800 | [diff] [blame] | 948 | /* use ocr_mask if no regulator */ |
Guennadi Liakhovetski | b958a67 | 2012-06-20 19:10:33 +0200 | [diff] [blame] | 949 | if (!mmc->ocr_avail) |
Kuninori Morimoto | 05fae4a | 2013-11-20 00:30:39 -0800 | [diff] [blame] | 950 | mmc->ocr_avail = pdata->ocr_mask; |
| 951 | |
| 952 | /* |
| 953 | * try again. |
| 954 | * There is possibility that regulator has not been probed |
| 955 | */ |
| 956 | if (!mmc->ocr_avail) |
| 957 | return -EPROBE_DEFER; |
| 958 | |
| 959 | return 0; |
Guennadi Liakhovetski | b958a67 | 2012-06-20 19:10:33 +0200 | [diff] [blame] | 960 | } |
| 961 | |
Guennadi Liakhovetski | 5a00a97 | 2013-02-15 16:13:56 +0100 | [diff] [blame] | 962 | static void tmio_mmc_of_parse(struct platform_device *pdev, |
| 963 | struct tmio_mmc_data *pdata) |
| 964 | { |
| 965 | const struct device_node *np = pdev->dev.of_node; |
| 966 | if (!np) |
| 967 | return; |
| 968 | |
| 969 | if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL)) |
| 970 | pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE; |
| 971 | } |
| 972 | |
Bill Pemberton | c3be1ef | 2012-11-19 13:23:06 -0500 | [diff] [blame] | 973 | int tmio_mmc_host_probe(struct tmio_mmc_host **host, |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 974 | struct platform_device *pdev, |
| 975 | struct tmio_mmc_data *pdata) |
| 976 | { |
| 977 | struct tmio_mmc_host *_host; |
| 978 | struct mmc_host *mmc; |
| 979 | struct resource *res_ctl; |
| 980 | int ret; |
| 981 | u32 irq_mask = TMIO_MASK_CMD; |
| 982 | |
Guennadi Liakhovetski | 5a00a97 | 2013-02-15 16:13:56 +0100 | [diff] [blame] | 983 | tmio_mmc_of_parse(pdev, pdata); |
| 984 | |
Guennadi Liakhovetski | 7b95213 | 2013-02-15 16:13:50 +0100 | [diff] [blame] | 985 | if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT)) |
| 986 | pdata->write16_hook = NULL; |
| 987 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 988 | res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 989 | if (!res_ctl) |
| 990 | return -EINVAL; |
| 991 | |
| 992 | mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev); |
| 993 | if (!mmc) |
| 994 | return -ENOMEM; |
| 995 | |
Simon Baatz | 274a752 | 2013-06-09 22:14:13 +0200 | [diff] [blame] | 996 | ret = mmc_of_parse(mmc); |
| 997 | if (ret < 0) |
| 998 | goto host_free; |
Guennadi Liakhovetski | 5a00a97 | 2013-02-15 16:13:56 +0100 | [diff] [blame] | 999 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1000 | pdata->dev = &pdev->dev; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1001 | _host = mmc_priv(mmc); |
| 1002 | _host->pdata = pdata; |
| 1003 | _host->mmc = mmc; |
| 1004 | _host->pdev = pdev; |
| 1005 | platform_set_drvdata(pdev, mmc); |
| 1006 | |
Chris Ball | 9d731e7 | 2013-09-06 07:29:05 -0400 | [diff] [blame] | 1007 | _host->set_pwr = pdata->set_pwr; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1008 | _host->set_clk_div = pdata->set_clk_div; |
| 1009 | |
Kuninori Morimoto | 05fae4a | 2013-11-20 00:30:39 -0800 | [diff] [blame] | 1010 | ret = tmio_mmc_init_ocr(_host); |
| 1011 | if (ret < 0) |
| 1012 | goto host_free; |
| 1013 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1014 | _host->ctl = ioremap(res_ctl->start, resource_size(res_ctl)); |
| 1015 | if (!_host->ctl) { |
| 1016 | ret = -ENOMEM; |
| 1017 | goto host_free; |
| 1018 | } |
| 1019 | |
| 1020 | mmc->ops = &tmio_mmc_ops; |
Guennadi Liakhovetski | 5a00a97 | 2013-02-15 16:13:56 +0100 | [diff] [blame] | 1021 | mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities; |
Kuninori Morimoto | dd006b3 | 2013-11-20 00:16:14 -0800 | [diff] [blame] | 1022 | mmc->caps2 |= pdata->capabilities2; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1023 | mmc->max_segs = 32; |
| 1024 | mmc->max_blk_size = 512; |
| 1025 | mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) * |
| 1026 | mmc->max_segs; |
| 1027 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; |
| 1028 | mmc->max_seg_size = mmc->max_req_size; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1029 | |
Guennadi Liakhovetski | c8be24c | 2012-02-09 22:57:09 +0100 | [diff] [blame] | 1030 | _host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD || |
Guennadi Liakhovetski | 2b1ac5c | 2012-02-09 22:57:08 +0100 | [diff] [blame] | 1031 | mmc->caps & MMC_CAP_NEEDS_POLL || |
Guennadi Liakhovetski | 5a00a97 | 2013-02-15 16:13:56 +0100 | [diff] [blame] | 1032 | mmc->caps & MMC_CAP_NONREMOVABLE || |
| 1033 | mmc->slot.cd_irq >= 0); |
Guennadi Liakhovetski | 2b1ac5c | 2012-02-09 22:57:08 +0100 | [diff] [blame] | 1034 | |
Guennadi Liakhovetski | e83b7a8 | 2013-06-06 16:35:44 +0200 | [diff] [blame] | 1035 | _host->power = TMIO_MMC_OFF_STOP; |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1036 | pm_runtime_enable(&pdev->dev); |
| 1037 | ret = pm_runtime_resume(&pdev->dev); |
| 1038 | if (ret < 0) |
| 1039 | goto pm_disable; |
| 1040 | |
Guennadi Liakhovetski | 8c102a9 | 2012-06-20 19:10:31 +0200 | [diff] [blame] | 1041 | if (tmio_mmc_clk_update(mmc) < 0) { |
| 1042 | mmc->f_max = pdata->hclk; |
| 1043 | mmc->f_min = mmc->f_max / 512; |
| 1044 | } |
| 1045 | |
Bastian Hecht | cbb18b3 | 2011-12-23 23:03:13 +0100 | [diff] [blame] | 1046 | /* |
| 1047 | * There are 4 different scenarios for the card detection: |
| 1048 | * 1) an external gpio irq handles the cd (best for power savings) |
| 1049 | * 2) internal sdhi irq handles the cd |
| 1050 | * 3) a worker thread polls the sdhi - indicated by MMC_CAP_NEEDS_POLL |
| 1051 | * 4) the medium is non-removable - indicated by MMC_CAP_NONREMOVABLE |
| 1052 | * |
Guennadi Liakhovetski | c8be24c | 2012-02-09 22:57:09 +0100 | [diff] [blame] | 1053 | * While we increment the runtime PM counter for all scenarios when |
| 1054 | * the mmc core activates us by calling an appropriate set_ios(), we |
| 1055 | * must additionally ensure that in case 2) the tmio mmc hardware stays |
Bastian Hecht | cbb18b3 | 2011-12-23 23:03:13 +0100 | [diff] [blame] | 1056 | * powered on during runtime for the card detection to work. |
| 1057 | */ |
Guennadi Liakhovetski | 2b1ac5c | 2012-02-09 22:57:08 +0100 | [diff] [blame] | 1058 | if (_host->native_hotplug) |
Bastian Hecht | cbb18b3 | 2011-12-23 23:03:13 +0100 | [diff] [blame] | 1059 | pm_runtime_get_noresume(&pdev->dev); |
| 1060 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1061 | tmio_mmc_clk_stop(_host); |
| 1062 | tmio_mmc_reset(_host); |
| 1063 | |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 1064 | _host->sdcard_irq_mask = sd_ctrl_read32(_host, CTL_IRQ_MASK); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1065 | tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL); |
Guennadi Liakhovetski | e0337cc | 2012-06-20 19:10:30 +0200 | [diff] [blame] | 1066 | |
| 1067 | /* Unmask the IRQs we want to know about */ |
| 1068 | if (!_host->chan_rx) |
| 1069 | irq_mask |= TMIO_MASK_READOP; |
| 1070 | if (!_host->chan_tx) |
| 1071 | irq_mask |= TMIO_MASK_WRITEOP; |
| 1072 | if (!_host->native_hotplug) |
| 1073 | irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); |
| 1074 | |
| 1075 | _host->sdcard_irq_mask &= ~irq_mask; |
| 1076 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1077 | if (pdata->flags & TMIO_MMC_SDIO_IRQ) |
| 1078 | tmio_mmc_enable_sdio_irq(mmc, 0); |
| 1079 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1080 | spin_lock_init(&_host->lock); |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 1081 | mutex_init(&_host->ios_lock); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1082 | |
| 1083 | /* Init delayed work for request timeouts */ |
| 1084 | INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work); |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 1085 | INIT_WORK(&_host->done, tmio_mmc_done_work); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1086 | |
| 1087 | /* See if we also get DMA */ |
| 1088 | tmio_mmc_request_dma(_host, pdata); |
| 1089 | |
Guennadi Liakhovetski | 8c102a9 | 2012-06-20 19:10:31 +0200 | [diff] [blame] | 1090 | ret = mmc_add_host(mmc); |
| 1091 | if (pdata->clk_disable) |
| 1092 | pdata->clk_disable(pdev); |
| 1093 | if (ret < 0) { |
| 1094 | tmio_mmc_host_remove(_host); |
| 1095 | return ret; |
| 1096 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1097 | |
Rafael J. Wysocki | c419e61 | 2012-03-13 01:01:51 +0100 | [diff] [blame] | 1098 | dev_pm_qos_expose_latency_limit(&pdev->dev, 100); |
| 1099 | |
Guennadi Liakhovetski | c8be24c | 2012-02-09 22:57:09 +0100 | [diff] [blame] | 1100 | if (pdata->flags & TMIO_MMC_USE_GPIO_CD) { |
Laurent Pinchart | 214fc30 | 2013-08-08 12:38:31 +0200 | [diff] [blame] | 1101 | ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0); |
Guennadi Liakhovetski | c8be24c | 2012-02-09 22:57:09 +0100 | [diff] [blame] | 1102 | if (ret < 0) { |
| 1103 | tmio_mmc_host_remove(_host); |
| 1104 | return ret; |
| 1105 | } |
| 1106 | } |
| 1107 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1108 | *host = _host; |
| 1109 | |
| 1110 | return 0; |
| 1111 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1112 | pm_disable: |
| 1113 | pm_runtime_disable(&pdev->dev); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1114 | iounmap(_host->ctl); |
| 1115 | host_free: |
| 1116 | mmc_free_host(mmc); |
| 1117 | |
| 1118 | return ret; |
| 1119 | } |
| 1120 | EXPORT_SYMBOL(tmio_mmc_host_probe); |
| 1121 | |
| 1122 | void tmio_mmc_host_remove(struct tmio_mmc_host *host) |
| 1123 | { |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1124 | struct platform_device *pdev = host->pdev; |
Guennadi Liakhovetski | c8be24c | 2012-02-09 22:57:09 +0100 | [diff] [blame] | 1125 | struct mmc_host *mmc = host->mmc; |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1126 | |
Guennadi Liakhovetski | 2b1ac5c | 2012-02-09 22:57:08 +0100 | [diff] [blame] | 1127 | if (!host->native_hotplug) |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1128 | pm_runtime_get_sync(&pdev->dev); |
| 1129 | |
Rafael J. Wysocki | c419e61 | 2012-03-13 01:01:51 +0100 | [diff] [blame] | 1130 | dev_pm_qos_hide_latency_limit(&pdev->dev); |
| 1131 | |
Guennadi Liakhovetski | c8be24c | 2012-02-09 22:57:09 +0100 | [diff] [blame] | 1132 | mmc_remove_host(mmc); |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 1133 | cancel_work_sync(&host->done); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1134 | cancel_delayed_work_sync(&host->delayed_reset_work); |
| 1135 | tmio_mmc_release_dma(host); |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1136 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1137 | pm_runtime_put_sync(&pdev->dev); |
| 1138 | pm_runtime_disable(&pdev->dev); |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1139 | |
| 1140 | iounmap(host->ctl); |
Guennadi Liakhovetski | c8be24c | 2012-02-09 22:57:09 +0100 | [diff] [blame] | 1141 | mmc_free_host(mmc); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1142 | } |
| 1143 | EXPORT_SYMBOL(tmio_mmc_host_remove); |
| 1144 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1145 | #ifdef CONFIG_PM |
| 1146 | int tmio_mmc_host_suspend(struct device *dev) |
| 1147 | { |
| 1148 | struct mmc_host *mmc = dev_get_drvdata(dev); |
| 1149 | struct tmio_mmc_host *host = mmc_priv(mmc); |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1150 | |
Ulf Hansson | d62c957 | 2013-09-26 10:36:06 +0200 | [diff] [blame] | 1151 | tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL); |
| 1152 | return 0; |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1153 | } |
| 1154 | EXPORT_SYMBOL(tmio_mmc_host_suspend); |
| 1155 | |
| 1156 | int tmio_mmc_host_resume(struct device *dev) |
| 1157 | { |
| 1158 | struct mmc_host *mmc = dev_get_drvdata(dev); |
| 1159 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 1160 | |
Guennadi Liakhovetski | c8be24c | 2012-02-09 22:57:09 +0100 | [diff] [blame] | 1161 | tmio_mmc_enable_dma(host, true); |
| 1162 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1163 | /* The MMC core will perform the complete set up */ |
Guennadi Liakhovetski | b22ffdc | 2013-04-22 10:29:26 +0200 | [diff] [blame] | 1164 | host->resuming = true; |
Ulf Hansson | d62c957 | 2013-09-26 10:36:06 +0200 | [diff] [blame] | 1165 | return 0; |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1166 | } |
| 1167 | EXPORT_SYMBOL(tmio_mmc_host_resume); |
| 1168 | |
| 1169 | #endif /* CONFIG_PM */ |
| 1170 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1171 | int tmio_mmc_host_runtime_suspend(struct device *dev) |
| 1172 | { |
| 1173 | return 0; |
| 1174 | } |
| 1175 | EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend); |
| 1176 | |
| 1177 | int tmio_mmc_host_runtime_resume(struct device *dev) |
| 1178 | { |
| 1179 | struct mmc_host *mmc = dev_get_drvdata(dev); |
| 1180 | struct tmio_mmc_host *host = mmc_priv(mmc); |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1181 | |
Guennadi Liakhovetski | 162f43e | 2011-07-14 18:39:10 +0200 | [diff] [blame] | 1182 | tmio_mmc_enable_dma(host, true); |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1183 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1184 | return 0; |
| 1185 | } |
| 1186 | EXPORT_SYMBOL(tmio_mmc_host_runtime_resume); |
| 1187 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1188 | MODULE_LICENSE("GPL v2"); |