From patchwork Tue May 8 14:42:30 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jayachandran C X-Patchwork-Id: 157703 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 0C574B6EEC for ; Wed, 9 May 2012 00:42:48 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754969Ab2EHOmq (ORCPT ); Tue, 8 May 2012 10:42:46 -0400 Received: from mms3.broadcom.com ([216.31.210.19]:1950 "EHLO MMS3.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754857Ab2EHOmq (ORCPT ); Tue, 8 May 2012 10:42:46 -0400 Received: from [10.9.200.131] by MMS3.broadcom.com with ESMTP (Broadcom SMTP Relay (Email Firewall v6.5)); Tue, 08 May 2012 07:42:56 -0700 X-Server-Uuid: B730DE51-FC43-4C83-941F-F1F78A914BDD Received: from mail-irva-13.broadcom.com (10.11.16.103) by IRVEXCHHUB01.corp.ad.broadcom.com (10.9.200.131) with Microsoft SMTP Server id 8.2.247.2; Tue, 8 May 2012 07:42:40 -0700 Received: from hqcas01.netlogicmicro.com (unknown [10.65.50.14]) by mail-irva-13.broadcom.com (Postfix) with ESMTP id 80FC19F9F9; Tue, 8 May 2012 07:42:39 -0700 (PDT) Received: from jayachandranc.netlogicmicro.com (10.7.0.77) by hqcas01.netlogicmicro.com (10.65.50.14) with Microsoft SMTP Server id 14.1.339.1; Tue, 8 May 2012 07:42:38 -0700 From: "Jayachandran C" To: linux-ide@vger.kernel.org, "Jeff Garzik" cc: "Kamlakant Patel" , "Jayachandran C" Subject: [PATCH] ata: Compact Flash/PCMCIA driver for XLR Date: Tue, 8 May 2012 20:12:30 +0530 Message-ID: <1336488150-19839-1-git-send-email-jayachandranc@netlogicmicro.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-Originating-IP: [10.7.0.77] X-WSS-ID: 63B7EF7A3E029992700-01-01 Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org From: Kamlakant Patel Add driver for the compact flash interface on Netlogic MIPS SoCs. The code is based on platform pcmcia driver, but adds interrupt handling code to ACK interrupts. Signed-off-by: Kamlakant Patel Signed-off-by: Jayachandran C --- drivers/ata/Kconfig | 9 ++ drivers/ata/Makefile | 1 + drivers/ata/pata_xlr_pcmcia.c | 194 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 204 insertions(+) create mode 100644 drivers/ata/pata_xlr_pcmcia.c diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index 6bdedd7..ba4a734 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig @@ -870,6 +870,15 @@ config PATA_WINBOND_VLB Support for the Winbond W83759A controller on Vesa Local Bus systems. +config PATA_XLR_PCMCIA + tristate "Netlogic XLR PATA PCMCIA/CompactFlash support" + depends on CPU_XLR + help + This option enables support for PCMCIA/CompactFlash driver for + Netlogic XLR SoCs. + + If unsure, say N. + comment "Generic fallback / legacy drivers" config PATA_ACPI diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile index 6ece5b7..772d076 100644 --- a/drivers/ata/Makefile +++ b/drivers/ata/Makefile @@ -91,6 +91,7 @@ obj-$(CONFIG_PATA_OF_PLATFORM) += pata_of_platform.o obj-$(CONFIG_PATA_RB532) += pata_rb532_cf.o obj-$(CONFIG_PATA_RZ1000) += pata_rz1000.o obj-$(CONFIG_PATA_SAMSUNG_CF) += pata_samsung_cf.o +obj-$(CONFIG_PATA_XLR_PCMCIA) += pata_xlr_pcmcia.o obj-$(CONFIG_PATA_PXA) += pata_pxa.o diff --git a/drivers/ata/pata_xlr_pcmcia.c b/drivers/ata/pata_xlr_pcmcia.c new file mode 100644 index 0000000..84de6d8 --- /dev/null +++ b/drivers/ata/pata_xlr_pcmcia.c @@ -0,0 +1,194 @@ +/* + * Copyright (c) 2012 Broadcom Corporation + * + * Based on Generic platform device PATA driver + * Copyright (C) 2006 - 2007 Paul Mundt + * + * Based on pata_pcmcia: + * + * Copyright 2005-2006 Red Hat Inc, all rights reserved. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include +#include +#include +#include +#include + +#define DRV_NAME "pata_xlr_platform" +#define DRV_VERSION "1.2" + +#define PATA_PCMCIA_BASE 0x1f0 +#define PATA_PCMCIA_STATUS 0x1f7 +#define PATA_PCMCIA_CTL 0x3f6 + +/* + * Provide our own set_mode() as we don't want to change anything that has + * already been configured.. + */ +static int xlr_pata_platform_set_mode(struct ata_link *link, + struct ata_device **unused) +{ + struct ata_device *dev; + + ata_for_each_dev(dev, link, ENABLED) { + /* We don't really care */ + dev->pio_mode = dev->xfer_mode = XFER_PIO_0; + dev->xfer_shift = ATA_SHIFT_PIO; + dev->flags |= ATA_DFLAG_PIO; + ata_dev_info(dev, "configured for PIO\n"); + } + return 0; +} + +static struct scsi_host_template pata_platform_sht = { + ATA_PIO_SHT(DRV_NAME), +}; + +void xlr_pata_irq_clear(struct ata_port *port) +{ + unsigned int reg; + + reg = readl(port->private_data); + writel(reg, port->private_data); +} + +bool xlr_pata_irq_check(struct ata_port *port) +{ + unsigned int reg; + + reg = readl(port->private_data); + + return (reg != 0); +} + +static struct ata_port_operations pata_platform_port_ops = { + .inherits = &ata_sff_port_ops, + .sff_data_xfer = ata_sff_data_xfer_noirq, + .cable_detect = ata_cable_unknown, + .set_mode = xlr_pata_platform_set_mode, + .sff_irq_check = xlr_pata_irq_check, + .sff_check_status = ata_sff_check_status, + .sff_irq_clear = xlr_pata_irq_clear, +}; + +int xlr_pata_platform_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ata_host *host = dev_get_drvdata(dev); + + ata_host_detach(host); + + return 0; +} + +static int __devinit xlr_pata_platform_probe(struct platform_device *pdev) +{ + struct ata_host *host; + struct ata_port *ap; + struct ata_ioports *ioaddr; + + struct resource *io_res; + struct resource *irq_res; + struct resource *ack_res; + + struct device *dev = &pdev->dev; + int irq = 0; + int irq_flags = 0; + + + /* + * Simple resource validation .. + */ + if (pdev->num_resources != 3) { + dev_err(&pdev->dev, "invalid number of resources\n"); + return -EINVAL; + } + + /* + * Get the I/O base first + */ + io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (unlikely(io_res == NULL)) + return -EINVAL; + + ack_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (unlikely(ack_res == NULL)) + return -EINVAL; + + /* + * And the IRQ + */ + irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + + if (irq_res && irq_res->start > 0) { + irq = irq_res->start; + irq_flags = irq_res->flags; + } + + host = ata_host_alloc(dev, 1); + if (!host) + return -ENOMEM; + + ap = host->ports[0]; + ap->ops = &pata_platform_port_ops; + ap->private_data = ioremap(ack_res->start, resource_size(ack_res)); + ap->flags |= ATA_FLAG_SLAVE_POSS; + + /* + * Use polling mode if there's no IRQ + */ + if (!irq) { + ap->flags |= ATA_FLAG_PIO_POLLING; + ata_port_desc(ap, "no IRQ, using PIO polling"); + } + + /* + * Handle the MMIO case + */ + ioaddr = &ap->ioaddr; + ioaddr->data_addr = devm_ioremap(dev, io_res->start, + resource_size(io_res)); + ioaddr->cmd_addr = ioaddr->data_addr + PATA_PCMCIA_BASE; + ioaddr->altstatus_addr = ioaddr->data_addr + PATA_PCMCIA_STATUS; + ioaddr->ctl_addr = ioaddr->data_addr + PATA_PCMCIA_CTL; + + /* Fixup the port shift for platforms that need it */ + ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA); + ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR); + ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE); + ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT); + ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL); + ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM); + ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH); + ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE); + ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS); + ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD); + + ata_port_desc(ap, "%s cmd 0x%x ctl 0x%x", "mmio", + (unsigned int)ap->ioaddr.cmd_addr, + (unsigned int)ap->ioaddr.ctl_addr); + + /* activate */ + return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL, + irq_flags, &pata_platform_sht); +} + +static struct platform_driver pata_platform_driver = { + .probe = xlr_pata_platform_probe, + .remove = __devexit_p(xlr_pata_platform_remove), + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + }, +}; +module_platform_driver(pata_platform_driver); + +MODULE_AUTHOR("Kamlakant Patel "); +MODULE_DESCRIPTION("XLR/XLS SoC PCMCIA/CF driver"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION(DRV_VERSION); +MODULE_ALIAS("platform:" DRV_NAME);