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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/ata/pata_ftide010.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/ata/pata_ftide010.c')
-rw-r--r--drivers/ata/pata_ftide010.c573
1 files changed, 573 insertions, 0 deletions
diff --git a/drivers/ata/pata_ftide010.c b/drivers/ata/pata_ftide010.c
new file mode 100644
index 000000000..092ba6f87
--- /dev/null
+++ b/drivers/ata/pata_ftide010.c
@@ -0,0 +1,573 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 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:
+ 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);
+ clk_disable_unprepare(ftide->pclk);
+
+ return 0;
+}
+
+static const struct of_device_id pata_ftide010_of_match[] = {
+ { .compatible = "faraday,ftide010", },
+ { /* sentinel */ }
+};
+
+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_DESCRIPTION("low level driver for Faraday Technology FTIDE010");
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);