4 * Copyright (C) 2009 Magnus Damm
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.
10 * Based on "Compaq ASIC3 support":
12 * Copyright 2001 Compaq Computer Corporation.
13 * Copyright 2004-2005 Phil Blundell
14 * Copyright 2007-2008 OpenedHand Ltd.
16 * Authors: Phil Blundell <pb@handhelds.org>,
17 * Samuel Ortiz <sameo@openedhand.com>
21 #include <linux/kernel.h>
22 #include <linux/clk.h>
23 #include <linux/slab.h>
24 #include <linux/mod_devicetable.h>
25 #include <linux/module.h>
26 #include <linux/of_device.h>
27 #include <linux/platform_device.h>
28 #include <linux/mmc/host.h>
29 #include <linux/mmc/sh_mobile_sdhi.h>
30 #include <linux/mfd/tmio.h>
31 #include <linux/sh_dma.h>
32 #include <linux/delay.h>
38 struct sh_mobile_sdhi_of_data
{
39 unsigned long tmio_flags
;
40 unsigned long capabilities
;
41 unsigned long capabilities2
;
44 static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg
[] = {
46 .tmio_flags
= TMIO_MMC_HAS_IDLE_WAIT
,
50 static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible
= {
51 .tmio_flags
= TMIO_MMC_HAS_IDLE_WAIT
| TMIO_MMC_WRPROTECT_DISABLE
,
52 .capabilities
= MMC_CAP_SD_HIGHSPEED
| MMC_CAP_SDIO_IRQ
,
55 static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible
= {
56 .tmio_flags
= TMIO_MMC_HAS_IDLE_WAIT
| TMIO_MMC_WRPROTECT_DISABLE
,
57 .capabilities
= MMC_CAP_SD_HIGHSPEED
| MMC_CAP_SDIO_IRQ
,
58 .capabilities2
= MMC_CAP2_NO_MULTI_READ
,
61 static const struct of_device_id sh_mobile_sdhi_of_match
[] = {
62 { .compatible
= "renesas,sdhi-shmobile" },
63 { .compatible
= "renesas,sdhi-sh7372" },
64 { .compatible
= "renesas,sdhi-sh73a0", .data
= &sh_mobile_sdhi_of_cfg
[0], },
65 { .compatible
= "renesas,sdhi-r8a73a4", .data
= &sh_mobile_sdhi_of_cfg
[0], },
66 { .compatible
= "renesas,sdhi-r8a7740", .data
= &sh_mobile_sdhi_of_cfg
[0], },
67 { .compatible
= "renesas,sdhi-r8a7778", .data
= &of_rcar_gen1_compatible
, },
68 { .compatible
= "renesas,sdhi-r8a7779", .data
= &of_rcar_gen1_compatible
, },
69 { .compatible
= "renesas,sdhi-r8a7790", .data
= &of_rcar_gen2_compatible
, },
70 { .compatible
= "renesas,sdhi-r8a7791", .data
= &of_rcar_gen2_compatible
, },
73 MODULE_DEVICE_TABLE(of
, sh_mobile_sdhi_of_match
);
75 struct sh_mobile_sdhi
{
77 struct tmio_mmc_data mmc_data
;
78 struct tmio_mmc_dma dma_priv
;
81 static int sh_mobile_sdhi_clk_enable(struct platform_device
*pdev
, unsigned int *f
)
83 struct mmc_host
*mmc
= platform_get_drvdata(pdev
);
84 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
85 struct sh_mobile_sdhi
*priv
= container_of(host
->pdata
, struct sh_mobile_sdhi
, mmc_data
);
86 int ret
= clk_prepare_enable(priv
->clk
);
90 *f
= clk_get_rate(priv
->clk
);
94 static void sh_mobile_sdhi_clk_disable(struct platform_device
*pdev
)
96 struct mmc_host
*mmc
= platform_get_drvdata(pdev
);
97 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
98 struct sh_mobile_sdhi
*priv
= container_of(host
->pdata
, struct sh_mobile_sdhi
, mmc_data
);
99 clk_disable_unprepare(priv
->clk
);
102 static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host
*host
)
106 while (--timeout
&& !(sd_ctrl_read16(host
, CTL_STATUS2
) & (1 << 13)))
110 dev_warn(host
->pdata
->dev
, "timeout waiting for SD bus idle\n");
117 static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host
*host
, int addr
)
122 case CTL_STOP_INTERNAL_ACTION
:
123 case CTL_XFER_BLK_COUNT
:
124 case CTL_SD_CARD_CLK_CTL
:
125 case CTL_SD_XFER_LEN
:
126 case CTL_SD_MEM_CARD_OPT
:
127 case CTL_TRANSACTION_CTL
:
129 return sh_mobile_sdhi_wait_idle(host
);
135 static void sh_mobile_sdhi_cd_wakeup(const struct platform_device
*pdev
)
137 mmc_detect_change(platform_get_drvdata(pdev
), msecs_to_jiffies(100));
140 static const struct sh_mobile_sdhi_ops sdhi_ops
= {
141 .cd_wakeup
= sh_mobile_sdhi_cd_wakeup
,
144 static int sh_mobile_sdhi_probe(struct platform_device
*pdev
)
146 const struct of_device_id
*of_id
=
147 of_match_device(sh_mobile_sdhi_of_match
, &pdev
->dev
);
148 struct sh_mobile_sdhi
*priv
;
149 struct tmio_mmc_data
*mmc_data
;
150 struct sh_mobile_sdhi_info
*p
= pdev
->dev
.platform_data
;
151 struct tmio_mmc_host
*host
;
152 struct resource
*res
;
154 bool multiplexed_isr
= true;
155 struct tmio_mmc_dma
*dma_priv
;
158 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
162 priv
= devm_kzalloc(&pdev
->dev
, sizeof(struct sh_mobile_sdhi
), GFP_KERNEL
);
164 dev_err(&pdev
->dev
, "kzalloc failed\n");
168 mmc_data
= &priv
->mmc_data
;
169 dma_priv
= &priv
->dma_priv
;
173 ret
= p
->init(pdev
, &sdhi_ops
);
179 priv
->clk
= devm_clk_get(&pdev
->dev
, NULL
);
180 if (IS_ERR(priv
->clk
)) {
181 ret
= PTR_ERR(priv
->clk
);
182 dev_err(&pdev
->dev
, "cannot get clock: %d\n", ret
);
186 mmc_data
->clk_enable
= sh_mobile_sdhi_clk_enable
;
187 mmc_data
->clk_disable
= sh_mobile_sdhi_clk_disable
;
188 mmc_data
->capabilities
= MMC_CAP_MMC_HIGHSPEED
;
189 mmc_data
->write16_hook
= sh_mobile_sdhi_write16_hook
;
191 mmc_data
->flags
= p
->tmio_flags
;
192 mmc_data
->ocr_mask
= p
->tmio_ocr_mask
;
193 mmc_data
->capabilities
|= p
->tmio_caps
;
194 mmc_data
->capabilities2
|= p
->tmio_caps2
;
195 mmc_data
->cd_gpio
= p
->cd_gpio
;
197 if (p
->dma_slave_tx
> 0 && p
->dma_slave_rx
> 0) {
199 * Yes, we have to provide slave IDs twice to TMIO:
200 * once as a filter parameter and once for channel
201 * configuration as an explicit slave ID
203 dma_priv
->chan_priv_tx
= (void *)p
->dma_slave_tx
;
204 dma_priv
->chan_priv_rx
= (void *)p
->dma_slave_rx
;
205 dma_priv
->slave_id_tx
= p
->dma_slave_tx
;
206 dma_priv
->slave_id_rx
= p
->dma_slave_rx
;
210 dma_priv
->alignment_shift
= 1; /* 2-byte alignment */
211 dma_priv
->filter
= shdma_chan_filter
;
213 mmc_data
->dma
= dma_priv
;
216 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
219 mmc_data
->flags
|= TMIO_MMC_BLKSZ_2BYTES
;
222 * All SDHI blocks support SDIO IRQ signalling.
224 mmc_data
->flags
|= TMIO_MMC_SDIO_IRQ
;
226 if (of_id
&& of_id
->data
) {
227 const struct sh_mobile_sdhi_of_data
*of_data
= of_id
->data
;
228 mmc_data
->flags
|= of_data
->tmio_flags
;
229 mmc_data
->capabilities
|= of_data
->capabilities
;
230 mmc_data
->capabilities2
|= of_data
->capabilities2
;
233 /* SD control register space size is 0x100, 0x200 for bus_shift=1 */
234 mmc_data
->bus_shift
= resource_size(res
) >> 9;
236 ret
= tmio_mmc_host_probe(&host
, pdev
, mmc_data
);
242 * this Workaround can be more clever method
244 ver
= sd_ctrl_read16(host
, CTL_VERSION
);
246 sd_ctrl_write16(host
, EXT_ACC
, 1);
249 * Allow one or more specific (named) ISRs or
250 * one or more multiplexed (un-named) ISRs.
253 irq
= platform_get_irq_byname(pdev
, SH_MOBILE_SDHI_IRQ_CARD_DETECT
);
255 multiplexed_isr
= false;
256 ret
= devm_request_irq(&pdev
->dev
, irq
, tmio_mmc_card_detect_irq
, 0,
257 dev_name(&pdev
->dev
), host
);
262 irq
= platform_get_irq_byname(pdev
, SH_MOBILE_SDHI_IRQ_SDIO
);
264 multiplexed_isr
= false;
265 ret
= devm_request_irq(&pdev
->dev
, irq
, tmio_mmc_sdio_irq
, 0,
266 dev_name(&pdev
->dev
), host
);
271 irq
= platform_get_irq_byname(pdev
, SH_MOBILE_SDHI_IRQ_SDCARD
);
273 multiplexed_isr
= false;
274 ret
= devm_request_irq(&pdev
->dev
, irq
, tmio_mmc_sdcard_irq
, 0,
275 dev_name(&pdev
->dev
), host
);
278 } else if (!multiplexed_isr
) {
280 "Principal SD-card IRQ is missing among named interrupts\n");
285 if (multiplexed_isr
) {
287 irq
= platform_get_irq(pdev
, i
);
291 ret
= devm_request_irq(&pdev
->dev
, irq
, tmio_mmc_irq
, 0,
292 dev_name(&pdev
->dev
), host
);
297 /* There must be at least one IRQ source */
304 dev_info(&pdev
->dev
, "%s base at 0x%08lx clock rate %u MHz\n",
305 mmc_hostname(host
->mmc
), (unsigned long)
306 (platform_get_resource(pdev
, IORESOURCE_MEM
, 0)->start
),
307 host
->mmc
->f_max
/ 1000000);
312 tmio_mmc_host_remove(host
);
320 static int sh_mobile_sdhi_remove(struct platform_device
*pdev
)
322 struct mmc_host
*mmc
= platform_get_drvdata(pdev
);
323 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
324 struct sh_mobile_sdhi_info
*p
= pdev
->dev
.platform_data
;
326 tmio_mmc_host_remove(host
);
334 static const struct dev_pm_ops tmio_mmc_dev_pm_ops
= {
335 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend
,
336 pm_runtime_force_resume
)
337 SET_PM_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend
,
338 tmio_mmc_host_runtime_resume
,
342 static struct platform_driver sh_mobile_sdhi_driver
= {
344 .name
= "sh_mobile_sdhi",
345 .pm
= &tmio_mmc_dev_pm_ops
,
346 .of_match_table
= sh_mobile_sdhi_of_match
,
348 .probe
= sh_mobile_sdhi_probe
,
349 .remove
= sh_mobile_sdhi_remove
,
352 module_platform_driver(sh_mobile_sdhi_driver
);
354 MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
355 MODULE_AUTHOR("Magnus Damm");
356 MODULE_LICENSE("GPL v2");
357 MODULE_ALIAS("platform:sh_mobile_sdhi");