Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 574 insertions, 0 deletions

diff --git a/drivers/ata/pata_ftide010.c b/drivers/ata/pata_ftide010.c
new file mode 100644
index 000000000..569a4a662
--- /dev/null
+++ b/drivers/ata/pata_ftide010.c
@@ -0,0 +1,574 @@
+/*
+ * Faraday Technology FTIDE010 driver
+ * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
+ *
+ * Includes portions of the SL2312/SL3516/Gemini PATA driver
+ * Copyright (C) 2003 StorLine, Inc <jason@storlink.com.tw>
+ * Copyright (C) 2009 Janos Laube <janos.dev@gmail.com>
+ * Copyright (C) 2010 Frederic Pecourt <opengemini@free.fr>
+ * Copyright (C) 2011 Tobias Waldvogel <tobias.waldvogel@gmail.com>
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/libata.h>
+#include <linux/bitops.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/clk.h>
+#include "sata_gemini.h"
+
+#define DRV_NAME "pata_ftide010"
+
+/**
+ * struct ftide010 - state container for the Faraday FTIDE010
+ * @dev: pointer back to the device representing this controller
+ * @base: remapped I/O space address
+ * @pclk: peripheral clock for the IDE block
+ * @host: pointer to the ATA host for this device
+ * @master_cbl: master cable type
+ * @slave_cbl: slave cable type
+ * @sg: Gemini SATA bridge pointer, if running on the Gemini
+ * @master_to_sata0: Gemini SATA bridge: the ATA master is connected
+ * to the SATA0 bridge
+ * @slave_to_sata0: Gemini SATA bridge: the ATA slave is connected
+ * to the SATA0 bridge
+ * @master_to_sata1: Gemini SATA bridge: the ATA master is connected
+ * to the SATA1 bridge
+ * @slave_to_sata1: Gemini SATA bridge: the ATA slave is connected
+ * to the SATA1 bridge
+ */
+struct ftide010 {
+	struct device *dev;
+	void __iomem *base;
+	struct clk *pclk;
+	struct ata_host *host;
+	unsigned int master_cbl;
+	unsigned int slave_cbl;
+	/* Gemini-specific properties */
+	struct sata_gemini *sg;
+	bool master_to_sata0;
+	bool slave_to_sata0;
+	bool master_to_sata1;
+	bool slave_to_sata1;
+};
+
+#define FTIDE010_DMA_REG	0x00
+#define FTIDE010_DMA_STATUS	0x02
+#define FTIDE010_IDE_BMDTPR	0x04
+#define FTIDE010_IDE_DEVICE_ID	0x08
+#define FTIDE010_PIO_TIMING	0x10
+#define FTIDE010_MWDMA_TIMING	0x11
+#define FTIDE010_UDMA_TIMING0	0x12 /* Master */
+#define FTIDE010_UDMA_TIMING1	0x13 /* Slave */
+#define FTIDE010_CLK_MOD	0x14
+/* These registers are mapped directly to the IDE registers */
+#define FTIDE010_CMD_DATA	0x20
+#define FTIDE010_ERROR_FEATURES	0x21
+#define FTIDE010_NSECT		0x22
+#define FTIDE010_LBAL		0x23
+#define FTIDE010_LBAM		0x24
+#define FTIDE010_LBAH		0x25
+#define FTIDE010_DEVICE		0x26
+#define FTIDE010_STATUS_COMMAND	0x27
+#define FTIDE010_ALTSTAT_CTRL	0x36
+
+/* Set this bit for UDMA mode 5 and 6 */
+#define FTIDE010_UDMA_TIMING_MODE_56	BIT(7)
+
+/* 0 = 50 MHz, 1 = 66 MHz */
+#define FTIDE010_CLK_MOD_DEV0_CLK_SEL	BIT(0)
+#define FTIDE010_CLK_MOD_DEV1_CLK_SEL	BIT(1)
+/* Enable UDMA on a device */
+#define FTIDE010_CLK_MOD_DEV0_UDMA_EN	BIT(4)
+#define FTIDE010_CLK_MOD_DEV1_UDMA_EN	BIT(5)
+
+static struct scsi_host_template pata_ftide010_sht = {
+	ATA_BMDMA_SHT(DRV_NAME),
+};
+
+/*
+ * Bus timings
+ *
+ * The unit of the below required timings is two clock periods of the ATA
+ * reference clock which is 30 nanoseconds per unit at 66MHz and 20
+ * nanoseconds per unit at 50 MHz. The PIO timings assume 33MHz speed for
+ * PIO.
+ *
+ * pio_active_time: array of 5 elements for T2 timing for Mode 0,
+ * 1, 2, 3 and 4. Range 0..15.
+ * pio_recovery_time: array of 5 elements for T2l timing for Mode 0,
+ * 1, 2, 3 and 4. Range 0..15.
+ * mdma_50_active_time: array of 4 elements for Td timing for multi
+ * word DMA, Mode 0, 1, and 2 at 50 MHz. Range 0..15.
+ * mdma_50_recovery_time: array of 4 elements for Tk timing for
+ * multi word DMA, Mode 0, 1 and 2 at 50 MHz. Range 0..15.
+ * mdma_66_active_time: array of 4 elements for Td timing for multi
+ * word DMA, Mode 0, 1 and 2 at 66 MHz. Range 0..15.
+ * mdma_66_recovery_time: array of 4 elements for Tk timing for
+ * multi word DMA, Mode 0, 1 and 2 at 66 MHz. Range 0..15.
+ * udma_50_setup_time: array of 4 elements for Tvds timing for ultra
+ * DMA, Mode 0, 1, 2, 3, 4 and 5 at 50 MHz. Range 0..7.
+ * udma_50_hold_time: array of 4 elements for Tdvh timing for
+ * multi word DMA, Mode 0, 1, 2, 3, 4 and 5 at 50 MHz, Range 0..7.
+ * udma_66_setup_time: array of 4 elements for Tvds timing for multi
+ * word DMA, Mode 0, 1, 2, 3, 4, 5 and 6 at 66 MHz. Range 0..7.
+ * udma_66_hold_time: array of 4 elements for Tdvh timing for
+ * multi word DMA, Mode 0, 1, 2, 3, 4, 5 and 6 at 66 MHz. Range 0..7.
+ */
+static const u8 pio_active_time[5] = {10, 10, 10, 3, 3};
+static const u8 pio_recovery_time[5] = {10, 3, 1, 3, 1};
+static const u8 mwdma_50_active_time[3] = {6, 2, 2};
+static const u8 mwdma_50_recovery_time[3] = {6, 2, 1};
+static const u8 mwdma_66_active_time[3] = {8, 3, 3};
+static const u8 mwdma_66_recovery_time[3] = {8, 2, 1};
+static const u8 udma_50_setup_time[6] = {3, 3, 2, 2, 1, 1};
+static const u8 udma_50_hold_time[6] = {3, 1, 1, 1, 1, 1};
+static const u8 udma_66_setup_time[7] = {4, 4, 3, 2, };
+static const u8 udma_66_hold_time[7] = {};
+
+/*
+ * We set 66 MHz for all MWDMA modes
+ */
+static const bool set_mdma_66_mhz[] = { true, true, true, true };
+
+/*
+ * We set 66 MHz for UDMA modes 3, 4 and 6 and no others
+ */
+static const bool set_udma_66_mhz[] = { false, false, false, true, true, false, true };
+
+static void ftide010_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct ftide010 *ftide = ap->host->private_data;
+	u8 speed = adev->dma_mode;
+	u8 devno = adev->devno & 1;
+	u8 udma_en_mask;
+	u8 f66m_en_mask;
+	u8 clkreg;
+	u8 timreg;
+	u8 i;
+
+	/* Target device 0 (master) or 1 (slave) */
+	if (!devno) {
+		udma_en_mask = FTIDE010_CLK_MOD_DEV0_UDMA_EN;
+		f66m_en_mask = FTIDE010_CLK_MOD_DEV0_CLK_SEL;
+	} else {
+		udma_en_mask = FTIDE010_CLK_MOD_DEV1_UDMA_EN;
+		f66m_en_mask = FTIDE010_CLK_MOD_DEV1_CLK_SEL;
+	}
+
+	clkreg = readb(ftide->base + FTIDE010_CLK_MOD);
+	clkreg &= ~udma_en_mask;
+	clkreg &= ~f66m_en_mask;
+
+	if (speed & XFER_UDMA_0) {
+		i = speed & ~XFER_UDMA_0;
+		dev_dbg(ftide->dev, "set UDMA mode %02x, index %d\n",
+			speed, i);
+
+		clkreg |= udma_en_mask;
+		if (set_udma_66_mhz[i]) {
+			clkreg |= f66m_en_mask;
+			timreg = udma_66_setup_time[i] << 4 |
+				udma_66_hold_time[i];
+		} else {
+			timreg = udma_50_setup_time[i] << 4 |
+				udma_50_hold_time[i];
+		}
+
+		/* A special bit needs to be set for modes 5 and 6 */
+		if (i >= 5)
+			timreg |= FTIDE010_UDMA_TIMING_MODE_56;
+
+		dev_dbg(ftide->dev, "UDMA write clkreg = %02x, timreg = %02x\n",
+			clkreg, timreg);
+
+		writeb(clkreg, ftide->base + FTIDE010_CLK_MOD);
+		writeb(timreg, ftide->base + FTIDE010_UDMA_TIMING0 + devno);
+	} else {
+		i = speed & ~XFER_MW_DMA_0;
+		dev_dbg(ftide->dev, "set MWDMA mode %02x, index %d\n",
+			speed, i);
+
+		if (set_mdma_66_mhz[i]) {
+			clkreg |= f66m_en_mask;
+			timreg = mwdma_66_active_time[i] << 4 |
+				mwdma_66_recovery_time[i];
+		} else {
+			timreg = mwdma_50_active_time[i] << 4 |
+				mwdma_50_recovery_time[i];
+		}
+		dev_dbg(ftide->dev,
+			"MWDMA write clkreg = %02x, timreg = %02x\n",
+			clkreg, timreg);
+		/* This will affect all devices */
+		writeb(clkreg, ftide->base + FTIDE010_CLK_MOD);
+		writeb(timreg, ftide->base + FTIDE010_MWDMA_TIMING);
+	}
+
+	/*
+	 * Store the current device (master or slave) in ap->private_data
+	 * so that .qc_issue() can detect if this changes and reprogram
+	 * the DMA settings.
+	 */
+	ap->private_data = adev;
+
+	return;
+}
+
+static void ftide010_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct ftide010 *ftide = ap->host->private_data;
+	u8 pio = adev->pio_mode - XFER_PIO_0;
+
+	dev_dbg(ftide->dev, "set PIO mode %02x, index %d\n",
+		adev->pio_mode, pio);
+	writeb(pio_active_time[pio] << 4 | pio_recovery_time[pio],
+	       ftide->base + FTIDE010_PIO_TIMING);
+}
+
+/*
+ * We implement our own qc_issue() callback since we may need to set up
+ * the timings differently for master and slave transfers: the CLK_MOD_REG
+ * and MWDMA_TIMING_REG is shared between master and slave, so reprogramming
+ * this may be necessary.
+ */
+static unsigned int ftide010_qc_issue(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+
+	/*
+	 * If the device changed, i.e. slave->master, master->slave,
+	 * then set up the DMA mode again so we are sure the timings
+	 * are correct.
+	 */
+	if (adev != ap->private_data && ata_dma_enabled(adev))
+		ftide010_set_dmamode(ap, adev);
+
+	return ata_bmdma_qc_issue(qc);
+}
+
+static struct ata_port_operations pata_ftide010_port_ops = {
+	.inherits	= &ata_bmdma_port_ops,
+	.set_dmamode	= ftide010_set_dmamode,
+	.set_piomode	= ftide010_set_piomode,
+	.qc_issue	= ftide010_qc_issue,
+};
+
+static struct ata_port_info ftide010_port_info = {
+	.flags		= ATA_FLAG_SLAVE_POSS,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA6,
+	.pio_mask	= ATA_PIO4,
+	.port_ops	= &pata_ftide010_port_ops,
+};
+
+#if IS_ENABLED(CONFIG_SATA_GEMINI)
+
+static int pata_ftide010_gemini_port_start(struct ata_port *ap)
+{
+	struct ftide010 *ftide = ap->host->private_data;
+	struct device *dev = ftide->dev;
+	struct sata_gemini *sg = ftide->sg;
+	int bridges = 0;
+	int ret;
+
+	ret = ata_bmdma_port_start(ap);
+	if (ret)
+		return ret;
+
+	if (ftide->master_to_sata0) {
+		dev_info(dev, "SATA0 (master) start\n");
+		ret = gemini_sata_start_bridge(sg, 0);
+		if (!ret)
+			bridges++;
+	}
+	if (ftide->master_to_sata1) {
+		dev_info(dev, "SATA1 (master) start\n");
+		ret = gemini_sata_start_bridge(sg, 1);
+		if (!ret)
+			bridges++;
+	}
+	/* Avoid double-starting */
+	if (ftide->slave_to_sata0 && !ftide->master_to_sata0) {
+		dev_info(dev, "SATA0 (slave) start\n");
+		ret = gemini_sata_start_bridge(sg, 0);
+		if (!ret)
+			bridges++;
+	}
+	/* Avoid double-starting */
+	if (ftide->slave_to_sata1 && !ftide->master_to_sata1) {
+		dev_info(dev, "SATA1 (slave) start\n");
+		ret = gemini_sata_start_bridge(sg, 1);
+		if (!ret)
+			bridges++;
+	}
+
+	dev_info(dev, "brought %d bridges online\n", bridges);
+	return (bridges > 0) ? 0 : -EINVAL; // -ENODEV;
+}
+
+static void pata_ftide010_gemini_port_stop(struct ata_port *ap)
+{
+	struct ftide010 *ftide = ap->host->private_data;
+	struct device *dev = ftide->dev;
+	struct sata_gemini *sg = ftide->sg;
+
+	if (ftide->master_to_sata0) {
+		dev_info(dev, "SATA0 (master) stop\n");
+		gemini_sata_stop_bridge(sg, 0);
+	}
+	if (ftide->master_to_sata1) {
+		dev_info(dev, "SATA1 (master) stop\n");
+		gemini_sata_stop_bridge(sg, 1);
+	}
+	/* Avoid double-stopping */
+	if (ftide->slave_to_sata0 && !ftide->master_to_sata0) {
+		dev_info(dev, "SATA0 (slave) stop\n");
+		gemini_sata_stop_bridge(sg, 0);
+	}
+	/* Avoid double-stopping */
+	if (ftide->slave_to_sata1 && !ftide->master_to_sata1) {
+		dev_info(dev, "SATA1 (slave) stop\n");
+		gemini_sata_stop_bridge(sg, 1);
+	}
+}
+
+static int pata_ftide010_gemini_cable_detect(struct ata_port *ap)
+{
+	struct ftide010 *ftide = ap->host->private_data;
+
+	/*
+	 * Return the master cable, I have no clue how to return a different
+	 * cable for the slave than for the master.
+	 */
+	return ftide->master_cbl;
+}
+
+static int pata_ftide010_gemini_init(struct ftide010 *ftide,
+				     struct ata_port_info *pi,
+				     bool is_ata1)
+{
+	struct device *dev = ftide->dev;
+	struct sata_gemini *sg;
+	enum gemini_muxmode muxmode;
+
+	/* Look up SATA bridge */
+	sg = gemini_sata_bridge_get();
+	if (IS_ERR(sg))
+		return PTR_ERR(sg);
+	ftide->sg = sg;
+
+	muxmode = gemini_sata_get_muxmode(sg);
+
+	/* Special ops */
+	pata_ftide010_port_ops.port_start =
+		pata_ftide010_gemini_port_start;
+	pata_ftide010_port_ops.port_stop =
+		pata_ftide010_gemini_port_stop;
+	pata_ftide010_port_ops.cable_detect =
+		pata_ftide010_gemini_cable_detect;
+
+	/* Flag port as SATA-capable */
+	if (gemini_sata_bridge_enabled(sg, is_ata1))
+		pi->flags |= ATA_FLAG_SATA;
+
+	/* This device has broken DMA, only PIO works */
+	if (of_machine_is_compatible("itian,sq201")) {
+		pi->mwdma_mask = 0;
+		pi->udma_mask = 0;
+	}
+
+	/*
+	 * We assume that a simple 40-wire cable is used in the PATA mode.
+	 * if you're adding a system using the PATA interface, make sure
+	 * the right cable is set up here, it might be necessary to use
+	 * special hardware detection or encode the cable type in the device
+	 * tree with special properties.
+	 */
+	if (!is_ata1) {
+		switch (muxmode) {
+		case GEMINI_MUXMODE_0:
+			ftide->master_cbl = ATA_CBL_SATA;
+			ftide->slave_cbl = ATA_CBL_PATA40;
+			ftide->master_to_sata0 = true;
+			break;
+		case GEMINI_MUXMODE_1:
+			ftide->master_cbl = ATA_CBL_SATA;
+			ftide->slave_cbl = ATA_CBL_NONE;
+			ftide->master_to_sata0 = true;
+			break;
+		case GEMINI_MUXMODE_2:
+			ftide->master_cbl = ATA_CBL_PATA40;
+			ftide->slave_cbl = ATA_CBL_PATA40;
+			break;
+		case GEMINI_MUXMODE_3:
+			ftide->master_cbl = ATA_CBL_SATA;
+			ftide->slave_cbl = ATA_CBL_SATA;
+			ftide->master_to_sata0 = true;
+			ftide->slave_to_sata1 = true;
+			break;
+		}
+	} else {
+		switch (muxmode) {
+		case GEMINI_MUXMODE_0:
+			ftide->master_cbl = ATA_CBL_SATA;
+			ftide->slave_cbl = ATA_CBL_NONE;
+			ftide->master_to_sata1 = true;
+			break;
+		case GEMINI_MUXMODE_1:
+			ftide->master_cbl = ATA_CBL_SATA;
+			ftide->slave_cbl = ATA_CBL_PATA40;
+			ftide->master_to_sata1 = true;
+			break;
+		case GEMINI_MUXMODE_2:
+			ftide->master_cbl = ATA_CBL_SATA;
+			ftide->slave_cbl = ATA_CBL_SATA;
+			ftide->slave_to_sata0 = true;
+			ftide->master_to_sata1 = true;
+			break;
+		case GEMINI_MUXMODE_3:
+			ftide->master_cbl = ATA_CBL_PATA40;
+			ftide->slave_cbl = ATA_CBL_PATA40;
+			break;
+		}
+	}
+	dev_info(dev, "set up Gemini PATA%d\n", is_ata1);
+
+	return 0;
+}
+#else
+static int pata_ftide010_gemini_init(struct ftide010 *ftide,
+				     struct ata_port_info *pi,
+				     bool is_ata1)
+{
+	return -ENOTSUPP;
+}
+#endif
+
+
+static int pata_ftide010_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct ata_port_info pi = ftide010_port_info;
+	const struct ata_port_info *ppi[] = { &pi, NULL };
+	struct ftide010 *ftide;
+	struct resource *res;
+	int irq;
+	int ret;
+	int i;
+
+	ftide = devm_kzalloc(dev, sizeof(*ftide), GFP_KERNEL);
+	if (!ftide)
+		return -ENOMEM;
+	ftide->dev = dev;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	ftide->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(ftide->base))
+		return PTR_ERR(ftide->base);
+
+	ftide->pclk = devm_clk_get(dev, "PCLK");
+	if (!IS_ERR(ftide->pclk)) {
+		ret = clk_prepare_enable(ftide->pclk);
+		if (ret) {
+			dev_err(dev, "failed to enable PCLK\n");
+			return ret;
+		}
+	}
+
+	/* Some special Cortina Gemini init, if needed */
+	if (of_device_is_compatible(np, "cortina,gemini-pata")) {
+		/*
+		 * We need to know which instance is probing (the
+		 * Gemini has two instances of FTIDE010) and we do
+		 * this simply by looking at the physical base
+		 * address, which is 0x63400000 for ATA1, else we
+		 * are ATA0. This will also set up the cable types.
+		 */
+		ret = pata_ftide010_gemini_init(ftide,
+				&pi,
+				(res->start == 0x63400000));
+		if (ret)
+			goto err_dis_clk;
+	} else {
+		/* Else assume we are connected using PATA40 */
+		ftide->master_cbl = ATA_CBL_PATA40;
+		ftide->slave_cbl = ATA_CBL_PATA40;
+	}
+
+	ftide->host = ata_host_alloc_pinfo(dev, ppi, 1);
+	if (!ftide->host) {
+		ret = -ENOMEM;
+		goto err_dis_clk;
+	}
+	ftide->host->private_data = ftide;
+
+	for (i = 0; i < ftide->host->n_ports; i++) {
+		struct ata_port *ap = ftide->host->ports[i];
+		struct ata_ioports *ioaddr = &ap->ioaddr;
+
+		ioaddr->bmdma_addr = ftide->base + FTIDE010_DMA_REG;
+		ioaddr->cmd_addr = ftide->base + FTIDE010_CMD_DATA;
+		ioaddr->ctl_addr = ftide->base + FTIDE010_ALTSTAT_CTRL;
+		ioaddr->altstatus_addr = ftide->base + FTIDE010_ALTSTAT_CTRL;
+		ata_sff_std_ports(ioaddr);
+	}
+
+	dev_info(dev, "device ID %08x, irq %d, reg %pR\n",
+		 readl(ftide->base + FTIDE010_IDE_DEVICE_ID), irq, res);
+
+	ret = ata_host_activate(ftide->host, irq, ata_bmdma_interrupt,
+				0, &pata_ftide010_sht);
+	if (ret)
+		goto err_dis_clk;
+
+	return 0;
+
+err_dis_clk:
+	if (!IS_ERR(ftide->pclk))
+		clk_disable_unprepare(ftide->pclk);
+	return ret;
+}
+
+static int pata_ftide010_remove(struct platform_device *pdev)
+{
+	struct ata_host *host = platform_get_drvdata(pdev);
+	struct ftide010 *ftide = host->private_data;
+
+	ata_host_detach(ftide->host);
+	if (!IS_ERR(ftide->pclk))
+		clk_disable_unprepare(ftide->pclk);
+
+	return 0;
+}
+
+static const struct of_device_id pata_ftide010_of_match[] = {
+	{
+		.compatible = "faraday,ftide010",
+	},
+	{},
+};
+
+static struct platform_driver pata_ftide010_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = of_match_ptr(pata_ftide010_of_match),
+	},
+	.probe = pata_ftide010_probe,
+	.remove = pata_ftide010_remove,
+};
+module_platform_driver(pata_ftide010_driver);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);