From: Joao Pinto Date: Wed, 11 May 2016 11:21:33 +0000 (+0100) Subject: ufs: add TC G210 pci driver X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ec658ea0c548f4c5cb5a6efad692bae571382f05;p=linux-beck.git ufs: add TC G210 pci driver This patch adds a glue pci driver for the Synopsys G210 Test Chip. [mkp: Fixed Kconfig depends and module name] Signed-off-by: Joao Pinto Reviewed-by: Hannes Reinicke Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig index 81fdfb376ea5..47966909286d 100644 --- a/drivers/scsi/ufs/Kconfig +++ b/drivers/scsi/ufs/Kconfig @@ -61,6 +61,14 @@ config SCSI_UFSHCD_PCI If unsure, say N. +config SCSI_UFS_DWC_TC_PCI + tristate "DesignWare pci support using a G210 Test Chip" + depends on SCSI_UFSHCD && PCI + ---help--- + Synopsys Test Chip is a PHY for prototyping purposes. + + If unsure, say N. + config SCSI_UFSHCD_PLATFORM tristate "Platform bus based UFS Controller support" depends on SCSI_UFSHCD diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile index d5774c64a0bb..6e77cb0bfee9 100644 --- a/drivers/scsi/ufs/Makefile +++ b/drivers/scsi/ufs/Makefile @@ -1,4 +1,5 @@ # UFSHCD makefile +obj-$(CONFIG_SCSI_UFS_DWC_TC_PCI) += tc-dwc-g210-pci.o ufshcd-dwc.o tc-dwc-g210.o obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) += tc-dwc-g210-pltfrm.o ufshcd-dwc.o tc-dwc-g210.o obj-$(CONFIG_SCSI_UFS_QCOM) += ufs-qcom.o obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o diff --git a/drivers/scsi/ufs/tc-dwc-g210-pci.c b/drivers/scsi/ufs/tc-dwc-g210-pci.c new file mode 100644 index 000000000000..c09a0fef0fe6 --- /dev/null +++ b/drivers/scsi/ufs/tc-dwc-g210-pci.c @@ -0,0 +1,181 @@ +/* + * Synopsys G210 Test Chip driver + * + * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com) + * + * Authors: Joao Pinto + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "ufshcd.h" +#include "ufshcd-dwc.h" +#include "tc-dwc-g210.h" + +#include +#include + +/* Test Chip type expected values */ +#define TC_G210_20BIT 20 +#define TC_G210_40BIT 40 +#define TC_G210_INV 0 + +static int tc_type = TC_G210_INV; +module_param(tc_type, int, 0); +MODULE_PARM_DESC(tc_type, "Test Chip Type (20 = 20-bit, 40 = 40-bit)"); + +static int tc_dwc_g210_pci_suspend(struct device *dev) +{ + return ufshcd_system_suspend(dev_get_drvdata(dev)); +} + +static int tc_dwc_g210_pci_resume(struct device *dev) +{ + return ufshcd_system_resume(dev_get_drvdata(dev)); +} + +static int tc_dwc_g210_pci_runtime_suspend(struct device *dev) +{ + return ufshcd_runtime_suspend(dev_get_drvdata(dev)); +} + +static int tc_dwc_g210_pci_runtime_resume(struct device *dev) +{ + return ufshcd_runtime_resume(dev_get_drvdata(dev)); +} + +static int tc_dwc_g210_pci_runtime_idle(struct device *dev) +{ + return ufshcd_runtime_idle(dev_get_drvdata(dev)); +} + +/** + * struct ufs_hba_dwc_vops - UFS DWC specific variant operations + */ +static struct ufs_hba_variant_ops tc_dwc_g210_pci_hba_vops = { + .name = "tc-dwc-g210-pci", + .link_startup_notify = ufshcd_dwc_link_startup_notify, +}; + +/** + * tc_dwc_g210_pci_shutdown - main function to put the controller in reset state + * @pdev: pointer to PCI device handle + */ +static void tc_dwc_g210_pci_shutdown(struct pci_dev *pdev) +{ + ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev)); +} + +/** + * tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space + * data structure memory + * @pdev - pointer to PCI handle + */ +static void tc_dwc_g210_pci_remove(struct pci_dev *pdev) +{ + struct ufs_hba *hba = pci_get_drvdata(pdev); + + pm_runtime_forbid(&pdev->dev); + pm_runtime_get_noresume(&pdev->dev); + ufshcd_remove(hba); +} + +/** + * tc_dwc_g210_pci_probe - probe routine of the driver + * @pdev: pointer to PCI device handle + * @id: PCI device id + * + * Returns 0 on success, non-zero value on failure + */ +static int +tc_dwc_g210_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct ufs_hba *hba; + void __iomem *mmio_base; + int err; + + /* Check Test Chip type and set the specific setup routine */ + if (tc_type == TC_G210_20BIT) { + tc_dwc_g210_pci_hba_vops.phy_initialization = + tc_dwc_g210_config_20_bit; + } else if (tc_type == TC_G210_40BIT) { + tc_dwc_g210_pci_hba_vops.phy_initialization = + tc_dwc_g210_config_40_bit; + } else { + dev_err(&pdev->dev, "test chip version not specified\n"); + return -EPERM; + } + + err = pcim_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "pcim_enable_device failed\n"); + return err; + } + + pci_set_master(pdev); + + err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD); + if (err < 0) { + dev_err(&pdev->dev, "request and iomap failed\n"); + return err; + } + + mmio_base = pcim_iomap_table(pdev)[0]; + + err = ufshcd_alloc_host(&pdev->dev, &hba); + if (err) { + dev_err(&pdev->dev, "Allocation failed\n"); + return err; + } + + INIT_LIST_HEAD(&hba->clk_list_head); + + hba->vops = &tc_dwc_g210_pci_hba_vops; + + err = ufshcd_init(hba, mmio_base, pdev->irq); + if (err) { + dev_err(&pdev->dev, "Initialization failed\n"); + return err; + } + + pci_set_drvdata(pdev, hba); + pm_runtime_put_noidle(&pdev->dev); + pm_runtime_allow(&pdev->dev); + + return 0; +} + +static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = { + .suspend = tc_dwc_g210_pci_suspend, + .resume = tc_dwc_g210_pci_resume, + .runtime_suspend = tc_dwc_g210_pci_runtime_suspend, + .runtime_resume = tc_dwc_g210_pci_runtime_resume, + .runtime_idle = tc_dwc_g210_pci_runtime_idle, +}; + +static const struct pci_device_id tc_dwc_g210_pci_tbl[] = { + { PCI_VENDOR_ID_SYNOPSYS, 0xB101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { PCI_VENDOR_ID_SYNOPSYS, 0xB102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { } /* terminate list */ +}; + +MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl); + +static struct pci_driver tc_dwc_g210_pci_driver = { + .name = "tc-dwc-g210-pci", + .id_table = tc_dwc_g210_pci_tbl, + .probe = tc_dwc_g210_pci_probe, + .remove = tc_dwc_g210_pci_remove, + .shutdown = tc_dwc_g210_pci_shutdown, + .driver = { + .pm = &tc_dwc_g210_pci_pm_ops + }, +}; + +module_pci_driver(tc_dwc_g210_pci_driver); + +MODULE_AUTHOR("Joao Pinto "); +MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver"); +MODULE_LICENSE("Dual BSD/GPL");