Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 1 | /* |
| 2 | * SuperH Mobile SDHI |
| 3 | * |
| 4 | * Copyright (C) 2009 Magnus Damm |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * Based on "Compaq ASIC3 support": |
| 11 | * |
| 12 | * Copyright 2001 Compaq Computer Corporation. |
| 13 | * Copyright 2004-2005 Phil Blundell |
| 14 | * Copyright 2007-2008 OpenedHand Ltd. |
| 15 | * |
| 16 | * Authors: Phil Blundell <pb@handhelds.org>, |
| 17 | * Samuel Ortiz <sameo@openedhand.com> |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/clk.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Paul Gortmaker | 88b4767 | 2011-07-03 15:15:51 -0400 | [diff] [blame] | 24 | #include <linux/module.h> |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 25 | #include <linux/platform_device.h> |
Magnus Damm | 3c49e81 | 2010-02-22 13:37:09 +0900 | [diff] [blame] | 26 | #include <linux/mmc/host.h> |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 27 | #include <linux/mmc/sh_mobile_sdhi.h> |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 28 | #include <linux/mfd/tmio.h> |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 29 | #include <linux/sh_dma.h> |
Simon Horman | 973ed3a | 2011-06-21 08:00:10 +0900 | [diff] [blame] | 30 | #include <linux/delay.h> |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 31 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 32 | #include "tmio_mmc.h" |
| 33 | |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 34 | struct sh_mobile_sdhi { |
| 35 | struct clk *clk; |
| 36 | struct tmio_mmc_data mmc_data; |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 37 | struct sh_dmae_slave param_tx; |
| 38 | struct sh_dmae_slave param_rx; |
| 39 | struct tmio_mmc_dma dma_priv; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 40 | }; |
| 41 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 42 | static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state) |
Magnus Damm | be9cd7b | 2009-11-27 04:31:27 +0000 | [diff] [blame] | 43 | { |
Magnus Damm | be9cd7b | 2009-11-27 04:31:27 +0000 | [diff] [blame] | 44 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; |
| 45 | |
| 46 | if (p && p->set_pwr) |
| 47 | p->set_pwr(pdev, state); |
| 48 | } |
| 49 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 50 | static int sh_mobile_sdhi_get_cd(struct platform_device *pdev) |
Arnd Hannemann | 998283e | 2010-08-24 17:27:00 +0200 | [diff] [blame] | 51 | { |
Arnd Hannemann | 998283e | 2010-08-24 17:27:00 +0200 | [diff] [blame] | 52 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; |
| 53 | |
| 54 | if (p && p->get_cd) |
| 55 | return p->get_cd(pdev); |
| 56 | else |
| 57 | return -ENOSYS; |
| 58 | } |
| 59 | |
Simon Horman | 973ed3a | 2011-06-21 08:00:10 +0900 | [diff] [blame] | 60 | static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host) |
| 61 | { |
| 62 | int timeout = 1000; |
| 63 | |
| 64 | while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13))) |
| 65 | udelay(1); |
| 66 | |
| 67 | if (!timeout) { |
| 68 | dev_warn(host->pdata->dev, "timeout waiting for SD bus idle\n"); |
| 69 | return -EBUSY; |
| 70 | } |
| 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr) |
| 76 | { |
| 77 | switch (addr) |
| 78 | { |
| 79 | case CTL_SD_CMD: |
| 80 | case CTL_STOP_INTERNAL_ACTION: |
| 81 | case CTL_XFER_BLK_COUNT: |
| 82 | case CTL_SD_CARD_CLK_CTL: |
| 83 | case CTL_SD_XFER_LEN: |
| 84 | case CTL_SD_MEM_CARD_OPT: |
| 85 | case CTL_TRANSACTION_CTL: |
| 86 | case CTL_DMA_ENABLE: |
| 87 | return sh_mobile_sdhi_wait_idle(host); |
| 88 | } |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
Paul Mundt | 25ab998 | 2010-09-16 17:14:40 +0900 | [diff] [blame] | 93 | static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev) |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 94 | { |
| 95 | struct sh_mobile_sdhi *priv; |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 96 | struct tmio_mmc_data *mmc_data; |
| 97 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 98 | struct tmio_mmc_host *host; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 99 | char clk_name[8]; |
Simon Horman | d5098cb | 2011-08-26 10:42:39 +0200 | [diff] [blame] | 100 | int irq, ret, i = 0; |
| 101 | bool multiplexed_isr = true; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 102 | |
| 103 | priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL); |
| 104 | if (priv == NULL) { |
| 105 | dev_err(&pdev->dev, "kzalloc failed\n"); |
| 106 | return -ENOMEM; |
| 107 | } |
| 108 | |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 109 | mmc_data = &priv->mmc_data; |
Guennadi Liakhovetski | 2595880 | 2011-05-11 16:51:15 +0000 | [diff] [blame] | 110 | p->pdata = mmc_data; |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 111 | |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 112 | snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id); |
| 113 | priv->clk = clk_get(&pdev->dev, clk_name); |
| 114 | if (IS_ERR(priv->clk)) { |
| 115 | dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); |
| 116 | ret = PTR_ERR(priv->clk); |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 117 | goto eclkget; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | clk_enable(priv->clk); |
| 121 | |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 122 | mmc_data->hclk = clk_get_rate(priv->clk); |
| 123 | mmc_data->set_pwr = sh_mobile_sdhi_set_pwr; |
Arnd Hannemann | 998283e | 2010-08-24 17:27:00 +0200 | [diff] [blame] | 124 | mmc_data->get_cd = sh_mobile_sdhi_get_cd; |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 125 | mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED; |
Guennadi Liakhovetski | bb0fe53 | 2010-05-19 18:37:36 +0000 | [diff] [blame] | 126 | if (p) { |
Guennadi Liakhovetski | f87c20a | 2010-05-19 18:36:08 +0000 | [diff] [blame] | 127 | mmc_data->flags = p->tmio_flags; |
Simon Horman | b91df15 | 2011-08-19 10:07:07 +0900 | [diff] [blame] | 128 | if (mmc_data->flags & TMIO_MMC_HAS_IDLE_WAIT) |
| 129 | mmc_data->write16_hook = sh_mobile_sdhi_write16_hook; |
Guennadi Liakhovetski | bb0fe53 | 2010-05-19 18:37:36 +0000 | [diff] [blame] | 130 | mmc_data->ocr_mask = p->tmio_ocr_mask; |
Arnd Hannemann | 998283e | 2010-08-24 17:27:00 +0200 | [diff] [blame] | 131 | mmc_data->capabilities |= p->tmio_caps; |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 132 | |
Guennadi Liakhovetski | 3e71337 | 2011-05-24 12:24:07 +0200 | [diff] [blame] | 133 | if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) { |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 134 | priv->param_tx.slave_id = p->dma_slave_tx; |
| 135 | priv->param_rx.slave_id = p->dma_slave_rx; |
| 136 | priv->dma_priv.chan_priv_tx = &priv->param_tx; |
| 137 | priv->dma_priv.chan_priv_rx = &priv->param_rx; |
| 138 | priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */ |
| 139 | mmc_data->dma = &priv->dma_priv; |
| 140 | } |
Guennadi Liakhovetski | bb0fe53 | 2010-05-19 18:37:36 +0000 | [diff] [blame] | 141 | } |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 142 | |
Yusuke Goda | f1334fb | 2010-08-30 11:50:19 +0100 | [diff] [blame] | 143 | /* |
| 144 | * All SDHI blocks support 2-byte and larger block sizes in 4-bit |
| 145 | * bus width mode. |
| 146 | */ |
| 147 | mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES; |
| 148 | |
Arnd Hannemann | 23b6607 | 2010-12-28 23:22:32 +0100 | [diff] [blame] | 149 | /* |
| 150 | * All SDHI blocks support SDIO IRQ signalling. |
| 151 | */ |
| 152 | mmc_data->flags |= TMIO_MMC_SDIO_IRQ; |
| 153 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 154 | ret = tmio_mmc_host_probe(&host, pdev, mmc_data); |
| 155 | if (ret < 0) |
| 156 | goto eprobe; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 157 | |
Simon Horman | d5098cb | 2011-08-26 10:42:39 +0200 | [diff] [blame] | 158 | /* |
| 159 | * Allow one or more specific (named) ISRs or |
| 160 | * one or more multiplexed (un-named) ISRs. |
| 161 | */ |
| 162 | |
| 163 | irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT); |
| 164 | if (irq >= 0) { |
| 165 | multiplexed_isr = false; |
| 166 | ret = request_irq(irq, tmio_mmc_card_detect_irq, 0, |
Magnus Damm | d6a1f86 | 2011-05-06 11:02:45 +0000 | [diff] [blame] | 167 | dev_name(&pdev->dev), host); |
Simon Horman | d5098cb | 2011-08-26 10:42:39 +0200 | [diff] [blame] | 168 | if (ret) |
| 169 | goto eirq_card_detect; |
Magnus Damm | 8e7bfdb | 2011-05-06 11:02:33 +0000 | [diff] [blame] | 170 | } |
Simon Horman | d5098cb | 2011-08-26 10:42:39 +0200 | [diff] [blame] | 171 | |
| 172 | irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO); |
| 173 | if (irq >= 0) { |
| 174 | multiplexed_isr = false; |
| 175 | ret = request_irq(irq, tmio_mmc_sdio_irq, 0, |
| 176 | dev_name(&pdev->dev), host); |
| 177 | if (ret) |
| 178 | goto eirq_sdio; |
| 179 | } |
| 180 | |
| 181 | irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD); |
| 182 | if (irq >= 0) { |
| 183 | multiplexed_isr = false; |
| 184 | ret = request_irq(irq, tmio_mmc_sdcard_irq, 0, |
| 185 | dev_name(&pdev->dev), host); |
| 186 | if (ret) |
| 187 | goto eirq_sdcard; |
| 188 | } else if (!multiplexed_isr) { |
| 189 | dev_err(&pdev->dev, |
| 190 | "Principal SD-card IRQ is missing among named interrupts\n"); |
| 191 | ret = irq; |
| 192 | goto eirq_sdcard; |
| 193 | } |
| 194 | |
| 195 | if (multiplexed_isr) { |
| 196 | while (1) { |
| 197 | irq = platform_get_irq(pdev, i); |
| 198 | if (irq < 0) |
| 199 | break; |
| 200 | i++; |
| 201 | ret = request_irq(irq, tmio_mmc_irq, 0, |
| 202 | dev_name(&pdev->dev), host); |
| 203 | if (ret) |
| 204 | goto eirq_multiplexed; |
| 205 | } |
| 206 | |
| 207 | /* There must be at least one IRQ source */ |
| 208 | if (!i) |
| 209 | goto eirq_multiplexed; |
| 210 | } |
| 211 | |
Magnus Damm | 1f7d681 | 2011-05-06 11:02:41 +0000 | [diff] [blame] | 212 | dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n", |
| 213 | mmc_hostname(host->mmc), (unsigned long) |
| 214 | (platform_get_resource(pdev,IORESOURCE_MEM, 0)->start), |
| 215 | mmc_data->hclk / 1000000); |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 216 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 217 | return ret; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 218 | |
Simon Horman | d5098cb | 2011-08-26 10:42:39 +0200 | [diff] [blame] | 219 | eirq_multiplexed: |
| 220 | while (i--) { |
| 221 | irq = platform_get_irq(pdev, i); |
| 222 | free_irq(irq, host); |
| 223 | } |
| 224 | eirq_sdcard: |
| 225 | irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO); |
| 226 | if (irq >= 0) |
| 227 | free_irq(irq, host); |
| 228 | eirq_sdio: |
| 229 | irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT); |
| 230 | if (irq >= 0) |
| 231 | free_irq(irq, host); |
| 232 | eirq_card_detect: |
Magnus Damm | 8e7bfdb | 2011-05-06 11:02:33 +0000 | [diff] [blame] | 233 | tmio_mmc_host_remove(host); |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 234 | eprobe: |
| 235 | clk_disable(priv->clk); |
| 236 | clk_put(priv->clk); |
| 237 | eclkget: |
| 238 | kfree(priv); |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 239 | return ret; |
| 240 | } |
| 241 | |
| 242 | static int sh_mobile_sdhi_remove(struct platform_device *pdev) |
| 243 | { |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 244 | struct mmc_host *mmc = platform_get_drvdata(pdev); |
| 245 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 246 | struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data); |
Guennadi Liakhovetski | 2595880 | 2011-05-11 16:51:15 +0000 | [diff] [blame] | 247 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; |
Simon Horman | d5098cb | 2011-08-26 10:42:39 +0200 | [diff] [blame] | 248 | int i = 0, irq; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 249 | |
Guennadi Liakhovetski | 2595880 | 2011-05-11 16:51:15 +0000 | [diff] [blame] | 250 | p->pdata = NULL; |
| 251 | |
Guennadi Liakhovetski | 742a0c7 | 2011-05-27 16:54:05 +0200 | [diff] [blame] | 252 | tmio_mmc_host_remove(host); |
| 253 | |
Simon Horman | d5098cb | 2011-08-26 10:42:39 +0200 | [diff] [blame] | 254 | while (1) { |
| 255 | irq = platform_get_irq(pdev, i++); |
| 256 | if (irq < 0) |
| 257 | break; |
| 258 | free_irq(irq, host); |
Magnus Damm | d6a1f86 | 2011-05-06 11:02:45 +0000 | [diff] [blame] | 259 | } |
| 260 | |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 261 | clk_disable(priv->clk); |
| 262 | clk_put(priv->clk); |
| 263 | kfree(priv); |
| 264 | |
| 265 | return 0; |
| 266 | } |
| 267 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 268 | static const struct dev_pm_ops tmio_mmc_dev_pm_ops = { |
| 269 | .suspend = tmio_mmc_host_suspend, |
| 270 | .resume = tmio_mmc_host_resume, |
Guennadi Liakhovetski | 2595880 | 2011-05-11 16:51:15 +0000 | [diff] [blame] | 271 | .runtime_suspend = tmio_mmc_host_runtime_suspend, |
| 272 | .runtime_resume = tmio_mmc_host_runtime_resume, |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 273 | }; |
| 274 | |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 275 | static struct platform_driver sh_mobile_sdhi_driver = { |
| 276 | .driver = { |
| 277 | .name = "sh_mobile_sdhi", |
| 278 | .owner = THIS_MODULE, |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 279 | .pm = &tmio_mmc_dev_pm_ops, |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 280 | }, |
| 281 | .probe = sh_mobile_sdhi_probe, |
| 282 | .remove = __devexit_p(sh_mobile_sdhi_remove), |
| 283 | }; |
| 284 | |
Axel Lin | d1f81a6 | 2011-11-26 12:55:43 +0800 | [diff] [blame] | 285 | module_platform_driver(sh_mobile_sdhi_driver); |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 286 | |
| 287 | MODULE_DESCRIPTION("SuperH Mobile SDHI driver"); |
| 288 | MODULE_AUTHOR("Magnus Damm"); |
| 289 | MODULE_LICENSE("GPL v2"); |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 290 | MODULE_ALIAS("platform:sh_mobile_sdhi"); |