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2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390 
 kernel/drivers/mmc/host/atmel-mci.c
....@@ -1,11 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Atmel MultiMedia Card Interface driver
34  *
45  * Copyright (C) 2004-2008 Atmel Corporation
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.
96  */
107 #include <linux/blkdev.h>
118 #include <linux/clk.h>
....@@ -172,6 +169,7 @@
172169 #define	atmci_writel(port, reg, value)			\
173170 	__raw_writel((value), (port)->regs + reg)
174171 
172
+#define ATMCI_CMD_TIMEOUT_MS	2000
175173 #define AUTOSUSPEND_DELAY	50
176174 
177175 #define ATMCI_DATA_ERROR_FLAGS	(ATMCI_DCRCE | ATMCI_DTOE | ATMCI_OVRE | ATMCI_UNRE)
....@@ -227,12 +225,13 @@
227225  * @lock: Spinlock protecting the queue and associated data.
228226  * @regs: Pointer to MMIO registers.
229227  * @sg: Scatterlist entry currently being processed by PIO or PDC code.
228
+ * @sg_len: Size of the scatterlist
230229  * @pio_offset: Offset into the current scatterlist entry.
231230  * @buffer: Buffer used if we don't have the r/w proof capability. We
232231  *      don't have the time to switch pdc buffers so we have to use only
233232  *      one buffer for the full transaction.
234233  * @buf_size: size of the buffer.
235
- * @phys_buf_addr: buffer address needed for pdc.
234
+ * @buf_phys_addr: buffer address needed for pdc.
236235  * @cur_slot: The slot which is currently using the controller.
237236  * @mrq: The request currently being processed on @cur_slot,
238237  *	or NULL if the controller is idle.
....@@ -242,6 +241,7 @@
242241  * @data_size: just data->blocks * data->blksz.
243242  * @dma: DMA client state.
244243  * @data_chan: DMA channel being used for the current data transfer.
244
+ * @dma_conf: Configuration for the DMA slave
245245  * @cmd_status: Snapshot of SR taken upon completion of the current
246246  *	command. Only valid when EVENT_CMD_COMPLETE is pending.
247247  * @data_status: Snapshot of SR taken upon completion of the current
....@@ -446,18 +446,7 @@
446446 	return 0;
447447 }
448448 
449
-static int atmci_req_open(struct inode *inode, struct file *file)
450
-{
451
-	return single_open(file, atmci_req_show, inode->i_private);
452
-}
453
-
454
-static const struct file_operations atmci_req_fops = {
455
-	.owner		= THIS_MODULE,
456
-	.open		= atmci_req_open,
457
-	.read		= seq_read,
458
-	.llseek		= seq_lseek,
459
-	.release	= single_release,
460
-};
449
+DEFINE_SHOW_ATTRIBUTE(atmci_req);
461450 
462451 static void atmci_show_status_reg(struct seq_file *s,
463452 		const char *regname, u32 value)
....@@ -583,59 +572,25 @@
583572 	return ret;
584573 }
585574 
586
-static int atmci_regs_open(struct inode *inode, struct file *file)
587
-{
588
-	return single_open(file, atmci_regs_show, inode->i_private);
589
-}
590
-
591
-static const struct file_operations atmci_regs_fops = {
592
-	.owner		= THIS_MODULE,
593
-	.open		= atmci_regs_open,
594
-	.read		= seq_read,
595
-	.llseek		= seq_lseek,
596
-	.release	= single_release,
597
-};
575
+DEFINE_SHOW_ATTRIBUTE(atmci_regs);
598576 
599577 static void atmci_init_debugfs(struct atmel_mci_slot *slot)
600578 {
601579 	struct mmc_host		*mmc = slot->mmc;
602580 	struct atmel_mci	*host = slot->host;
603581 	struct dentry		*root;
604
-	struct dentry		*node;
605582 
606583 	root = mmc->debugfs_root;
607584 	if (!root)
608585 		return;
609586 
610
-	node = debugfs_create_file("regs", S_IRUSR, root, host,
611
-			&atmci_regs_fops);
612
-	if (IS_ERR(node))
613
-		return;
614
-	if (!node)
615
-		goto err;
616
-
617
-	node = debugfs_create_file("req", S_IRUSR, root, slot, &atmci_req_fops);
618
-	if (!node)
619
-		goto err;
620
-
621
-	node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state);
622
-	if (!node)
623
-		goto err;
624
-
625
-	node = debugfs_create_x32("pending_events", S_IRUSR, root,
626
-				     (u32 *)&host->pending_events);
627
-	if (!node)
628
-		goto err;
629
-
630
-	node = debugfs_create_x32("completed_events", S_IRUSR, root,
631
-				     (u32 *)&host->completed_events);
632
-	if (!node)
633
-		goto err;
634
-
635
-	return;
636
-
637
-err:
638
-	dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n");
587
+	debugfs_create_file("regs", S_IRUSR, root, host, &atmci_regs_fops);
588
+	debugfs_create_file("req", S_IRUSR, root, slot, &atmci_req_fops);
589
+	debugfs_create_u32("state", S_IRUSR, root, &host->state);
590
+	debugfs_create_xul("pending_events", S_IRUSR, root,
591
+			   &host->pending_events);
592
+	debugfs_create_xul("completed_events", S_IRUSR, root,
593
+			   &host->completed_events);
639594 }
640595 
641596 #if defined(CONFIG_OF)
....@@ -856,6 +811,9 @@
856811 static void atmci_send_command(struct atmel_mci *host,
857812 		struct mmc_command *cmd, u32 cmd_flags)
858813 {
814
+	unsigned int timeout_ms = cmd->busy_timeout ? cmd->busy_timeout :
815
+		ATMCI_CMD_TIMEOUT_MS;
816
+
859817 	WARN_ON(host->cmd);
860818 	host->cmd = cmd;
861819 
....@@ -865,6 +823,8 @@
865823 
866824 	atmci_writel(host, ATMCI_ARGR, cmd->arg);
867825 	atmci_writel(host, ATMCI_CMDR, cmd_flags);
826
+
827
+	mod_timer(&host->timer, jiffies + msecs_to_jiffies(timeout_ms));
868828 }
869829 
870830 static void atmci_send_stop_cmd(struct atmel_mci *host, struct mmc_data *data)
....@@ -1362,8 +1322,6 @@
13621322 	 * prepared yet.)
13631323 	 */
13641324 	atmci_writel(host, ATMCI_IER, iflags);
1365
-
1366
-	mod_timer(&host->timer, jiffies +  msecs_to_jiffies(2000));
13671325 }
13681326 
13691327 static void atmci_queue_request(struct atmel_mci *host,
....@@ -1430,6 +1388,9 @@
14301388 		break;
14311389 	case MMC_BUS_WIDTH_4:
14321390 		slot->sdc_reg |= ATMCI_SDCBUS_4BIT;
1391
+		break;
1392
+	case MMC_BUS_WIDTH_8:
1393
+		slot->sdc_reg |= ATMCI_SDCBUS_8BIT;
14331394 		break;
14341395 	}
14351396 
....@@ -1602,6 +1563,8 @@
16021563 
16031564 	WARN_ON(host->cmd || host->data);
16041565 
1566
+	del_timer(&host->timer);
1567
+
16051568 	/*
16061569 	 * Update the MMC clock rate if necessary. This may be
16071570 	 * necessary if set_ios() is called when a different slot is
....@@ -1627,8 +1590,6 @@
16271590 		dev_vdbg(&host->pdev->dev, "list empty\n");
16281591 		host->state = STATE_IDLE;
16291592 	}
1630
-
1631
-	del_timer(&host->timer);
16321593 
16331594 	spin_unlock(&host->lock);
16341595 	mmc_request_done(prev_mmc, mrq);
....@@ -1857,7 +1818,6 @@
18571818 				atmci_writel(host, ATMCI_IER, ATMCI_NOTBUSY);
18581819 				state = STATE_WAITING_NOTBUSY;
18591820 			} else if (host->mrq->stop) {
1860
-				atmci_writel(host, ATMCI_IER, ATMCI_CMDRDY);
18611821 				atmci_send_stop_cmd(host, data);
18621822 				state = STATE_SENDING_STOP;
18631823 			} else {
....@@ -1890,8 +1850,6 @@
18901850 				 * command to send.
18911851 				 */
18921852 				if (host->mrq->stop) {
1893
-					atmci_writel(host, ATMCI_IER,
1894
-					             ATMCI_CMDRDY);
18951853 					atmci_send_stop_cmd(host, data);
18961854 					state = STATE_SENDING_STOP;
18971855 				} else {
....@@ -2262,6 +2220,7 @@
22622220 {
22632221 	struct mmc_host			*mmc;
22642222 	struct atmel_mci_slot		*slot;
2223
+	int ret;
22652224 
22662225 	mmc = mmc_alloc_host(sizeof(struct atmel_mci_slot), &host->pdev->dev);
22672226 	if (!mmc)
....@@ -2296,8 +2255,11 @@
22962255 	 * use only one bit for data to prevent fifo underruns and overruns
22972256 	 * which will corrupt data.
22982257 	 */
2299
-	if ((slot_data->bus_width >= 4) && host->caps.has_rwproof)
2258
+	if ((slot_data->bus_width >= 4) && host->caps.has_rwproof) {
23002259 		mmc->caps |= MMC_CAP_4_BIT_DATA;
2260
+		if (slot_data->bus_width >= 8)
2261
+			mmc->caps |= MMC_CAP_8_BIT_DATA;
2262
+	}
23012263 
23022264 	if (atmci_get_version(host) < 0x200) {
23032265 		mmc->max_segs = 256;
....@@ -2342,11 +2304,13 @@
23422304 
23432305 	host->slot[id] = slot;
23442306 	mmc_regulator_get_supply(mmc);
2345
-	mmc_add_host(mmc);
2307
+	ret = mmc_add_host(mmc);
2308
+	if (ret) {
2309
+		mmc_free_host(mmc);
2310
+		return ret;
2311
+	}
23462312 
23472313 	if (gpio_is_valid(slot->detect_pin)) {
2348
-		int ret;
2349
-
23502314 		timer_setup(&slot->detect_timer, atmci_detect_change, 0);
23512315 
23522316 		ret = request_irq(gpio_to_irq(slot->detect_pin),
....@@ -2389,8 +2353,7 @@
23892353 
23902354 static int atmci_configure_dma(struct atmel_mci *host)
23912355 {
2392
-	host->dma.chan = dma_request_slave_channel_reason(&host->pdev->dev,
2393
-							"rxtx");
2356
+	host->dma.chan = dma_request_chan(&host->pdev->dev, "rxtx");
23942357 
23952358 	if (PTR_ERR(host->dma.chan) == -ENODEV) {
23962359 		struct mci_platform_data *pdata = host->pdev->dev.platform_data;
....@@ -2455,6 +2418,7 @@
24552418 	case 0x600:
24562419 	case 0x500:
24572420 		host->caps.has_odd_clk_div = 1;
2421
+		fallthrough;
24582422 	case 0x400:
24592423 	case 0x300:
24602424 		host->caps.has_dma_conf_reg = 1;
....@@ -2462,13 +2426,16 @@
24622426 		host->caps.has_cfg_reg = 1;
24632427 		host->caps.has_cstor_reg = 1;
24642428 		host->caps.has_highspeed = 1;
2429
+		fallthrough;
24652430 	case 0x200:
24662431 		host->caps.has_rwproof = 1;
24672432 		host->caps.need_blksz_mul_4 = 0;
24682433 		host->caps.need_notbusy_for_read_ops = 1;
2434
+		fallthrough;
24692435 	case 0x100:
24702436 		host->caps.has_bad_data_ordering = 0;
24712437 		host->caps.need_reset_after_xfer = 0;
2438
+		fallthrough;
24722439 	case 0x0:
24732440 		break;
24742441 	default:
....@@ -2684,7 +2651,7 @@
26842651 {
26852652 	struct atmel_mci *host = dev_get_drvdata(dev);
26862653 
2687
-	pinctrl_pm_select_default_state(dev);
2654
+	pinctrl_select_default_state(dev);
26882655 
26892656 	return clk_prepare_enable(host->mck);
26902657 }