1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Broadcom SATA3 AHCI Controller Driver
5  * Copyright © 2009-2015 Broadcom Corporation
22 #include "ahci.h"
24 #define DRV_NAME					"brcm-ahci"
28  #define MMIO_ENDIAN_SHIFT				0 /* CPU->AHCI */
29  #define DMADESC_ENDIAN_SHIFT				2 /* AHCI->DDR */
30  #define DMADATA_ENDIAN_SHIFT				4 /* AHCI->DDR */
51 /* On big-endian MIPS, buses are reversed to big endian, so switch them back */
53 #define DATA_ENDIAN			 2 /* AHCI->DDR inbound accesses */
54 #define MMIO_ENDIAN			 2 /* CPU->AHCI outbound accesses */
97 	 * bus endianness (i.e., big-endian CPU + big endian bus ==> native  in brcm_sata_readreg()
120 	struct brcm_ahci_priv *priv = hpriv->plat_data;  in brcm_sata_alpm_init()
125 	host_caps = readl(hpriv->mmio + HOST_CAP);  in brcm_sata_alpm_init()
127 		hpriv->flags |= AHCI_HFLAG_YES_ALPM;  in brcm_sata_alpm_init()
136 		if (priv->port_mask & BIT(i))  in brcm_sata_alpm_init()
138 			       hpriv->mmio + SATA_PORT_PCTRL6(port_ctrl));  in brcm_sata_alpm_init()
144 	void __iomem *phyctrl = priv->top_ctrl + SATA_TOP_CTRL_PHY_CTRL +  in brcm_sata_phy_enable()
149 	if (priv->quirks & BRCM_AHCI_QUIRK_SKIP_PHY_ENABLE)  in brcm_sata_phy_enable()
176 	void __iomem *phyctrl = priv->top_ctrl + SATA_TOP_CTRL_PHY_CTRL +  in brcm_sata_phy_disable()
181 	if (priv->quirks & BRCM_AHCI_QUIRK_SKIP_PHY_ENABLE)  in brcm_sata_phy_disable()
184 	/* power-off the PHY digital logic */  in brcm_sata_phy_disable()
204 		if (priv->port_mask & BIT(i))  in brcm_sata_phys_enable()
213 		if (priv->port_mask & BIT(i))  in brcm_sata_phys_disable()
222 	impl = readl(hpriv->mmio + HOST_PORTS_IMPL);  in brcm_ahci_get_portmask()
225 		dev_warn(priv->dev, "warning: more ports than PHYs (%#x)\n",  in brcm_ahci_get_portmask()
228 		dev_info(priv->dev, "no ports found\n");  in brcm_ahci_get_portmask()
235 	void __iomem *ctrl = priv->top_ctrl + SATA_TOP_CTRL_BUS_CTRL;  in brcm_sata_init()
241 	if (priv->version == BRCM_SATA_NSP)  in brcm_sata_init()
251 	struct ata_port *ap = dev->link->ap;  in brcm_ahci_read_id()
252 	struct ata_host *host = ap->host;  in brcm_ahci_read_id()
253 	struct ahci_host_priv *hpriv = host->private_data;  in brcm_ahci_read_id()
254 	struct brcm_ahci_priv *priv = hpriv->plat_data;  in brcm_ahci_read_id()
255 	void __iomem *mmio = hpriv->mmio;  in brcm_ahci_read_id()
269 	spin_lock_irqsave(&host->lock, flags);  in brcm_ahci_read_id()
274 	spin_unlock_irqrestore(&host->lock, flags);  in brcm_ahci_read_id()
277 	brcm_sata_phy_disable(priv, ap->port_no);  in brcm_ahci_read_id()
287 	brcm_sata_phy_enable(priv, ap->port_no);  in brcm_ahci_read_id()
289 	/* Re-initialize and calibrate the PHY */  in brcm_ahci_read_id()
290 	for (i = 0; i < hpriv->nports; i++) {  in brcm_ahci_read_id()
291 		rc = phy_init(hpriv->phys[i]);  in brcm_ahci_read_id()
295 		rc = phy_calibrate(hpriv->phys[i]);  in brcm_ahci_read_id()
297 			phy_exit(hpriv->phys[i]);  in brcm_ahci_read_id()
302 	/* Re-enable host interrupts */  in brcm_ahci_read_id()
303 	spin_lock_irqsave(&host->lock, flags);  in brcm_ahci_read_id()
308 	spin_unlock_irqrestore(&host->lock, flags);  in brcm_ahci_read_id()
313 	while (--i >= 0) {  in brcm_ahci_read_id()
314 		phy_power_off(hpriv->phys[i]);  in brcm_ahci_read_id()
315 		phy_exit(hpriv->phys[i]);  in brcm_ahci_read_id()
323 	struct ahci_host_priv *hpriv = host->private_data;  in brcm_ahci_host_stop()
345 	struct ahci_host_priv *hpriv = host->private_data;  in brcm_ahci_suspend()
346 	struct brcm_ahci_priv *priv = hpriv->plat_data;  in brcm_ahci_suspend()
356 	reset_control_assert(priv->rcdev_ahci);  in brcm_ahci_suspend()
357 	reset_control_rearm(priv->rcdev_rescal);  in brcm_ahci_suspend()
365 	struct ahci_host_priv *hpriv = host->private_data;  in brcm_ahci_resume()
366 	struct brcm_ahci_priv *priv = hpriv->plat_data;  in brcm_ahci_resume()
369 	ret = reset_control_deassert(priv->rcdev_ahci);  in brcm_ahci_resume()
372 	ret = reset_control_reset(priv->rcdev_rescal);  in brcm_ahci_resume()
376 	/* Make sure clocks are turned on before re-configuration */  in brcm_ahci_resume()
390 	 * ahci_platform_resume() as-is since a second call to  in brcm_ahci_resume()
425 	{.compatible = "brcm,bcm7425-ahci", .data = (void *)BRCM_SATA_BCM7425},
426 	{.compatible = "brcm,bcm7445-ahci", .data = (void *)BRCM_SATA_BCM7445},
427 	{.compatible = "brcm,bcm63138-ahci", .data = (void *)BRCM_SATA_BCM7445},
428 	{.compatible = "brcm,bcm-nsp-ahci", .data = (void *)BRCM_SATA_NSP},
429 	{.compatible = "brcm,bcm7216-ahci", .data = (void *)BRCM_SATA_BCM7216},
437 	struct device *dev = &pdev->dev;  in brcm_ahci_probe()
445 		return -ENOMEM;  in brcm_ahci_probe()
447 	of_id = of_match_node(ahci_of_match, pdev->dev.of_node);  in brcm_ahci_probe()
449 		return -ENODEV;  in brcm_ahci_probe()
451 	priv->version = (unsigned long)of_id->data;  in brcm_ahci_probe()
452 	priv->dev = dev;  in brcm_ahci_probe()
454 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "top-ctrl");  in brcm_ahci_probe()
455 	priv->top_ctrl = devm_ioremap_resource(dev, res);  in brcm_ahci_probe()
456 	if (IS_ERR(priv->top_ctrl))  in brcm_ahci_probe()
457 		return PTR_ERR(priv->top_ctrl);  in brcm_ahci_probe()
459 	if (priv->version == BRCM_SATA_BCM7216) {  in brcm_ahci_probe()
460 		priv->rcdev_rescal = devm_reset_control_get_optional_shared(  in brcm_ahci_probe()
461 			&pdev->dev, "rescal");  in brcm_ahci_probe()
462 		if (IS_ERR(priv->rcdev_rescal))  in brcm_ahci_probe()
463 			return PTR_ERR(priv->rcdev_rescal);  in brcm_ahci_probe()
465 	priv->rcdev_ahci = devm_reset_control_get_optional(&pdev->dev, "ahci");  in brcm_ahci_probe()
466 	if (IS_ERR(priv->rcdev_ahci))  in brcm_ahci_probe()
467 		return PTR_ERR(priv->rcdev_ahci);  in brcm_ahci_probe()
473 	hpriv->plat_data = priv;  in brcm_ahci_probe()
474 	hpriv->flags = AHCI_HFLAG_WAKE_BEFORE_STOP | AHCI_HFLAG_NO_WRITE_TO_RO;  in brcm_ahci_probe()
476 	switch (priv->version) {  in brcm_ahci_probe()
478 		hpriv->flags |= AHCI_HFLAG_DELAY_ENGINE;  in brcm_ahci_probe()
481 		hpriv->flags |= AHCI_HFLAG_NO_NCQ;  in brcm_ahci_probe()
482 		priv->quirks |= BRCM_AHCI_QUIRK_SKIP_PHY_ENABLE;  in brcm_ahci_probe()
488 	ret = reset_control_reset(priv->rcdev_rescal);  in brcm_ahci_probe()
491 	ret = reset_control_deassert(priv->rcdev_ahci);  in brcm_ahci_probe()
504 	 * of the standard AHCI register space.  in brcm_ahci_probe()
508 	/* Initializes priv->port_mask which is used below */  in brcm_ahci_probe()
509 	priv->port_mask = brcm_ahci_get_portmask(hpriv, priv);  in brcm_ahci_probe()
510 	if (!priv->port_mask) {  in brcm_ahci_probe()
511 		ret = -ENODEV;  in brcm_ahci_probe()
529 	dev_info(dev, "Broadcom AHCI SATA3 registered\n");  in brcm_ahci_probe()
542 	reset_control_assert(priv->rcdev_ahci);  in brcm_ahci_probe()
543 	reset_control_rearm(priv->rcdev_rescal);  in brcm_ahci_probe()
549 	struct ata_host *host = dev_get_drvdata(&pdev->dev);  in brcm_ahci_remove()
550 	struct ahci_host_priv *hpriv = host->private_data;  in brcm_ahci_remove()
551 	struct brcm_ahci_priv *priv = hpriv->plat_data;  in brcm_ahci_remove()
567 	ret = brcm_ahci_suspend(&pdev->dev);  in brcm_ahci_shutdown()
569 		dev_err(&pdev->dev, "failed to shutdown\n");  in brcm_ahci_shutdown()
586 MODULE_DESCRIPTION("Broadcom SATA3 AHCI Controller Driver");
589 MODULE_ALIAS("platform:sata-brcmstb");