linux-kernel - [PATCH v2 3/5] scsi: ufs: tc-dwc-pci: Use PDI ID to match Test Chip type

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Date:   Fri, 24 Apr 2020 15:44:47 +0200
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     linux-scsi@...r.kernel.org
Cc:     Joao Pinto <Joao.Pinto@...opsys.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Joao Lima <Joao.Lima@...opsys.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 3/5] scsi: ufs: tc-dwc-pci: Use PDI ID to match Test Chip type

In preparation for the addition of new Test Chips, we re-arrange the
initialization sequence so that we rely on PCI ID to match for given
Test Chip type.

Signed-off-by: Jose Abreu <Jose.Abreu@...opsys.com>

---
Cc: Joao Lima <Joao.Lima@...opsys.com>
Cc: Jose Abreu <Jose.Abreu@...opsys.com>
Cc: Alim Akhtar <alim.akhtar@...sung.com>
Cc: Avri Altman <avri.altman@....com>
Cc: "James E.J. Bottomley" <jejb@...ux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@...cle.com>
Cc: linux-scsi@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/scsi/ufs/tc-dwc-pci.c | 68 ++++++++++++++++++++++++++++---------------
 1 file changed, 44 insertions(+), 24 deletions(-)

diff --git a/drivers/scsi/ufs/tc-dwc-pci.c b/drivers/scsi/ufs/tc-dwc-pci.c
index aeb11f7f0c91..74a2d80d32bd 100644
--- a/drivers/scsi/ufs/tc-dwc-pci.c
+++ b/drivers/scsi/ufs/tc-dwc-pci.c
@@ -14,6 +14,11 @@
 #include <linux/pci.h>
 #include <linux/pm_runtime.h>
 
+struct tc_dwc_data {
+	struct ufs_hba_variant_ops ops;
+	int (*setup)(struct pci_dev *pdev, struct tc_dwc_data *data);
+};
+
 /* Test Chip type expected values */
 #define TC_G210_20BIT 20
 #define TC_G210_40BIT 40
@@ -23,6 +28,20 @@ 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_set_config(struct pci_dev *pdev, struct tc_dwc_data *data)
+{
+	if (tc_type == TC_G210_20BIT) {
+		data->ops.phy_initialization = tc_dwc_g210_config_20_bit;
+	} else if (tc_type == TC_G210_40BIT) {
+		data->ops.phy_initialization = tc_dwc_g210_config_40_bit;
+	} else {
+		dev_err(&pdev->dev, "test chip version not specified\n");
+		return -EPERM;
+	}
+
+	return 0;
+}
+
 static int tc_dwc_pci_suspend(struct device *dev)
 {
 	return ufshcd_system_suspend(dev_get_drvdata(dev));
@@ -48,14 +67,6 @@ static int tc_dwc_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_pci_hba_vops = {
-	.name                   = "tc-dwc-pci",
-	.link_startup_notify	= ufshcd_dwc_link_startup_notify,
-};
-
 /**
  * tc_dwc_pci_shutdown - main function to put the controller in reset state
  * @pdev: pointer to PCI device handle
@@ -89,22 +100,11 @@ static void tc_dwc_pci_remove(struct pci_dev *pdev)
 static int
 tc_dwc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
-	struct ufs_hba *hba;
+	struct tc_dwc_data *data = (struct tc_dwc_data *)id->driver_data;
 	void __iomem *mmio_base;
+	struct ufs_hba *hba;
 	int err;
 
-	/* Check Test Chip type and set the specific setup routine */
-	if (tc_type == TC_G210_20BIT) {
-		tc_dwc_pci_hba_vops.phy_initialization =
-						tc_dwc_g210_config_20_bit;
-	} else if (tc_type == TC_G210_40BIT) {
-		tc_dwc_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");
@@ -127,7 +127,16 @@ tc_dwc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		return err;
 	}
 
-	hba->vops = &tc_dwc_pci_hba_vops;
+	/* Check Test Chip type and set the specific setup routine */
+	if (data && data->setup) {
+		err = data->setup(pdev, data);
+		if (err)
+			return err;
+	} else {
+		return -ENOENT;
+	}
+
+	hba->vops = &data->ops;
 
 	err = ufshcd_init(hba, mmio_base, pdev->irq);
 	if (err) {
@@ -150,9 +159,20 @@ static const struct dev_pm_ops tc_dwc_pci_pm_ops = {
 	.runtime_idle    = tc_dwc_pci_runtime_idle,
 };
 
+static struct tc_dwc_data tc_dwc_g210_data = {
+	.setup = tc_dwc_g210_set_config,
+	.ops = {
+		.name = "tc-dwc-g210-pci",
+		.link_startup_notify = ufshcd_dwc_link_startup_notify,
+	},
+};
+
+#define PCI_DEVICE_ID_SYNOPSYS_TC_G210_1	0xB101
+#define PCI_DEVICE_ID_SYNOPSYS_TC_G210_2	0xB102
+
 static const struct pci_device_id tc_dwc_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 },
+	{ PCI_DEVICE_DATA(SYNOPSYS, TC_G210_1, &tc_dwc_g210_data) },
+	{ PCI_DEVICE_DATA(SYNOPSYS, TC_G210_2, &tc_dwc_g210_data) },
 	{ }	/* terminate list */
 };
 
-- 
2.7.4