On Fri, Dec 17, 2021 at 8:17 AM Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> wrote: > > Merge the OF pata_of_platform driver into pata_platform. > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > --- > drivers/ata/Kconfig | 3 +- > drivers/ata/Makefile | 1 - > drivers/ata/pata_of_platform.c | 90 --------------- > drivers/ata/pata_platform.c | 199 +++++++++++++++++++++++++-------- > include/linux/ata_platform.h | 9 -- > 5 files changed, 153 insertions(+), 149 deletions(-) > delete mode 100644 drivers/ata/pata_of_platform.c > > diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig > index a7da8ea7b3ed..0fab5cae45d5 100644 > --- a/drivers/ata/Kconfig > +++ b/drivers/ata/Kconfig > @@ -1122,7 +1122,8 @@ config PATA_PLATFORM > > config PATA_OF_PLATFORM > tristate "OpenFirmware platform device PATA support" > - depends on PATA_PLATFORM && OF > + depends on OF > + select PATA_PLATFORM Can't we just kill the kconfig option? > help > This option enables support for generic directly connected ATA > devices commonly found on embedded systems with OpenFirmware > diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c > index cb3134bf88eb..b8d8d51bc562 100644 > --- a/drivers/ata/pata_platform.c > +++ b/drivers/ata/pata_platform.c > @@ -11,21 +11,42 @@ > * License. See the file "COPYING" in the main directory of this archive > * for more details. > */ > -#include <linux/kernel.h> > -#include <linux/module.h> > -#include <linux/blkdev.h> > -#include <scsi/scsi_host.h> > #include <linux/ata.h> > +#include <linux/ata_platform.h> > +#include <linux/blkdev.h> > +#include <linux/kernel.h> > #include <linux/libata.h> > +#include <linux/module.h> > +#include <linux/of_address.h> > #include <linux/platform_device.h> > -#include <linux/ata_platform.h> > +#include <scsi/scsi_host.h> > > #define DRV_NAME "pata_platform" > #define DRV_VERSION "1.2" > > static int pio_mask = 1; > module_param(pio_mask, int, 0); > -MODULE_PARM_DESC(pio_mask, "PIO modes supported, mode 0 only by default"); > +MODULE_PARM_DESC(pio_mask, "PIO modes supported, mode 0 only by default (param valid only for non DT users)"); > + > +/** > + * struct pata_platform_priv - Private info > + * @io_res: Resource representing I/O base > + * @ctl_res: Resource representing CTL base > + * @irq_res: Resource representing IRQ and its flags > + * @ioport_shift: I/O port shift > + * @mask: PIO mask > + * @sht: scsi_host_template to use when registering > + * @use16bit: Flag to indicate 16-bit IO instead of 32-bit > + */ > +struct pata_platform_priv { > + struct resource *io_res; > + struct resource *ctl_res; > + struct resource *irq_res; > + unsigned int ioport_shift; > + int mask; > + struct scsi_host_template *sht; > + bool use16bit; > +}; > > /* > * Provide our own set_mode() as we don't want to change anything that has > @@ -66,15 +87,9 @@ static void pata_platform_setup_port(struct ata_ioports *ioaddr, > } > > /** > - * __pata_platform_probe - attach a platform interface > + * pata_platform_host_activate - attach a platform interface > * @dev: device > - * @io_res: Resource representing I/O base > - * @ctl_res: Resource representing CTL base > - * @irq_res: Resource representing IRQ and its flags > - * @ioport_shift: I/O port shift > - * @__pio_mask: PIO mask > - * @sht: scsi_host_template to use when registering > - * @use16bit: Flag to indicate 16-bit IO instead of 32-bit > + * @priv: Pointer to struct pata_platform_priv > * > * Register a platform bus IDE interface. Such interfaces are PIO and we > * assume do not support IRQ sharing. > @@ -94,10 +109,7 @@ static void pata_platform_setup_port(struct ata_ioports *ioaddr, > * > * If no IRQ resource is present, PIO polling mode is used instead. > */ > -int __pata_platform_probe(struct device *dev, struct resource *io_res, > - struct resource *ctl_res, struct resource *irq_res, > - unsigned int ioport_shift, int __pio_mask, > - struct scsi_host_template *sht, bool use16bit) > +static int pata_platform_host_activate(struct device *dev, struct pata_platform_priv *priv) > { > struct ata_host *host; > struct ata_port *ap; > @@ -108,15 +120,15 @@ int __pata_platform_probe(struct device *dev, struct resource *io_res, > /* > * Check for MMIO > */ > - mmio = (( io_res->flags == IORESOURCE_MEM) && > - (ctl_res->flags == IORESOURCE_MEM)); > + mmio = ((priv->io_res->flags == IORESOURCE_MEM) && > + (priv->ctl_res->flags == IORESOURCE_MEM)); > > /* > * And the IRQ > */ > - if (irq_res && irq_res->start > 0) { > - irq = irq_res->start; > - irq_flags = (irq_res->flags & IRQF_TRIGGER_MASK) | IRQF_SHARED; > + if (priv->irq_res && priv->irq_res->start > 0) { > + irq = priv->irq_res->start; > + irq_flags = (priv->irq_res->flags & IRQF_TRIGGER_MASK) | IRQF_SHARED; > } > > /* > @@ -131,12 +143,12 @@ int __pata_platform_probe(struct device *dev, struct resource *io_res, > ap->ops->inherits = &ata_sff_port_ops; > ap->ops->cable_detect = ata_cable_unknown; > ap->ops->set_mode = pata_platform_set_mode; > - if (use16bit) > + if (priv->use16bit) > ap->ops->sff_data_xfer = ata_sff_data_xfer; > else > ap->ops->sff_data_xfer = ata_sff_data_xfer32; > > - ap->pio_mask = __pio_mask; > + ap->pio_mask = priv->mask; > ap->flags |= ATA_FLAG_SLAVE_POSS; > > /* > @@ -151,15 +163,15 @@ int __pata_platform_probe(struct device *dev, struct resource *io_res, > * Handle the MMIO case > */ > if (mmio) { > - ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start, > - resource_size(io_res)); > - ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start, > - resource_size(ctl_res)); > + ap->ioaddr.cmd_addr = devm_ioremap(dev, priv->io_res->start, > + resource_size(priv->io_res)); > + ap->ioaddr.ctl_addr = devm_ioremap(dev, priv->ctl_res->start, > + resource_size(priv->ctl_res)); > } else { > - ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start, > - resource_size(io_res)); > - ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start, > - resource_size(ctl_res)); > + ap->ioaddr.cmd_addr = devm_ioport_map(dev, priv->io_res->start, > + resource_size(priv->io_res)); > + ap->ioaddr.ctl_addr = devm_ioport_map(dev, priv->ctl_res->start, > + resource_size(priv->ctl_res)); > } > if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) { > dev_err(dev, "failed to map IO/CTL base\n"); > @@ -168,23 +180,83 @@ int __pata_platform_probe(struct device *dev, struct resource *io_res, > > ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr; > > - pata_platform_setup_port(&ap->ioaddr, ioport_shift); > + pata_platform_setup_port(&ap->ioaddr, priv->ioport_shift); > > ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport", > - (unsigned long long)io_res->start, > - (unsigned long long)ctl_res->start); > + (unsigned long long)priv->io_res->start, > + (unsigned long long)priv->ctl_res->start); > > /* activate */ > return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL, > - irq_flags, sht); > + irq_flags, priv->sht); > } > -EXPORT_SYMBOL_GPL(__pata_platform_probe); > > -static int pata_platform_probe(struct platform_device *pdev) > +static int pata_of_platform_get_pdata(struct platform_device *ofdev, > + struct pata_platform_priv *priv) > { > - struct resource *io_res; > + struct device_node *dn = ofdev->dev.of_node; > struct resource *ctl_res; > struct resource *irq_res; > + struct resource *io_res; > + int pio_mode = 0; > + int irq; > + int ret; > + > + ctl_res = devm_kzalloc(&ofdev->dev, sizeof(*ctl_res), GFP_KERNEL); > + io_res = devm_kzalloc(&ofdev->dev, sizeof(*io_res), GFP_KERNEL); > + irq_res = devm_kzalloc(&ofdev->dev, sizeof(*irq_res), GFP_KERNEL); > + if (!ctl_res || !io_res || !irq_res) > + return -ENOMEM; > + > + ret = of_address_to_resource(dn, 0, io_res); > + if (ret) { > + dev_err(&ofdev->dev, "can't get IO address from device tree\n"); > + return -EINVAL; > + } > + priv->io_res = io_res; > + > + ret = of_address_to_resource(dn, 1, ctl_res); > + if (ret) { > + dev_err(&ofdev->dev, "can't get CTL address from device tree\n"); > + return -EINVAL; > + } > + priv->ctl_res = ctl_res; > + > + irq = platform_get_irq_optional(ofdev, 0); > + if (irq <= 0 && irq != -ENXIO) > + return irq ? irq : -ENXIO; > + > + if (irq > 0) { > + irq_res->start = irq; > + irq_res->end = irq; > + irq_res->flags = IORESOURCE_IRQ | irq_get_trigger_type(irq); Though of_irq_to_resource() does the same thing, I think the irq code handles the flags automatically for DT. > + priv->irq_res = irq_res; > + } else { > + devm_kfree(&ofdev->dev, io_res); Is this supposed to be irq_res? Otherwise, there shouldn't be any need to free a devres allocation. > + } > + > + of_property_read_u32(dn, "reg-shift", &priv->ioport_shift); > + > + if (!of_property_read_u32(dn, "pio-mode", &pio_mode)) { > + if (pio_mode > 6) { > + dev_err(&ofdev->dev, "invalid pio-mode\n"); > + return -EINVAL; > + } > + } else { > + dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n"); > + } > + > + priv->use16bit = of_property_read_bool(dn, "ata-generic,use16bit"); > + > + priv->mask = 1 << pio_mode; > + priv->mask |= (1 << pio_mode) - 1; > + > + return 0; > +} > + > +static int pata_platform_get_pdata(struct platform_device *pdev, > + struct pata_platform_priv *priv) > +{ > struct pata_platform_info *pp_info = dev_get_platdata(&pdev->dev); > > /* > @@ -198,32 +270,63 @@ static int pata_platform_probe(struct platform_device *pdev) > /* > * Get the I/O base first > */ > - io_res = platform_get_mem_or_io(pdev, 0); > - if (unlikely(!io_res)) > + priv->io_res = platform_get_mem_or_io(pdev, 0); > + if (unlikely(!priv->io_res)) > return -EINVAL; > > /* > * Then the CTL base > */ > - ctl_res = platform_get_mem_or_io(pdev, 1); > - if (unlikely(!ctl_res)) > + priv->ctl_res = platform_get_mem_or_io(pdev, 1); > + if (unlikely(!priv->ctl_res)) > return -EINVAL; > > /* > * And the IRQ > */ > - irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); > + priv->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); > + > + priv->ioport_shift = pp_info ? pp_info->ioport_shift : 0; > + priv->mask = pio_mask; > + priv->use16bit = false; > > - return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res, > - pp_info ? pp_info->ioport_shift : 0, > - pio_mask, &pata_platform_sht, false); > + return 0; > +} > + > +static int pata_platform_probe(struct platform_device *pdev) > +{ > + struct pata_platform_priv *priv; > + int ret; > + > + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return -ENOMEM; > + > + if (!dev_of_node(&pdev->dev)) > + ret = pata_platform_get_pdata(pdev, priv); > + else > + ret = pata_of_platform_get_pdata(pdev, priv); > + > + if (ret) > + return ret; > + > + priv->sht = &pata_platform_sht; > + > + return pata_platform_host_activate(&pdev->dev, priv); > } > > +static const struct of_device_id pata_of_platform_match[] = { > + { .compatible = "ata-generic", }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, pata_of_platform_match); > + > static struct platform_driver pata_platform_driver = { > .probe = pata_platform_probe, > .remove = ata_platform_remove_one, > .driver = { > .name = DRV_NAME, > + .of_match_table = pata_of_platform_match, > }, > }; > > diff --git a/include/linux/ata_platform.h b/include/linux/ata_platform.h > index 9cafec92282d..91b8529e6712 100644 > --- a/include/linux/ata_platform.h > +++ b/include/linux/ata_platform.h > @@ -13,15 +13,6 @@ struct pata_platform_info { > > struct scsi_host_template; > > -extern int __pata_platform_probe(struct device *dev, > - struct resource *io_res, > - struct resource *ctl_res, > - struct resource *irq_res, > - unsigned int ioport_shift, > - int __pio_mask, > - struct scsi_host_template *sht, > - bool use16bit); > - > /* > * Marvell SATA private data > */ > -- > 2.17.1 >