lkml.org 
[lkml]   [2019]   [Apr]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 2/6] usb: host: xhci-tegra: Selectively program IPFS
Date
From: JC Kuo <jckuo@nvidia.com>

Starting with Tegra186, the XUSB controller no longer has the IPFS
wrapper. This commit adds a "has_ipfs" field to struct tegra_xusb_soc
that can be used to declare the existence of the IPFS wrapper.

For the existing chips (i.e. Tegra124 and Tegra210), the new field is
set to true. A future patch adding support for Tegra186 will set it to
false.

Signed-off-by: JC Kuo <jckuo@nvidia.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
drivers/usb/host/xhci-tegra.c | 43 +++++++++++++++++++++--------------
1 file changed, 26 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index efb0cad8710e..4d133bbabdda 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -161,6 +161,7 @@ struct tegra_xusb_soc {
} ports;

bool scale_ss_clock;
+ bool has_ipfs;
};

struct tegra_xusb {
@@ -637,16 +638,18 @@ static irqreturn_t tegra_xusb_mbox_thread(int irq, void *data)
return IRQ_HANDLED;
}

-static void tegra_xusb_ipfs_config(struct tegra_xusb *tegra,
- struct resource *regs)
+static void tegra_xusb_config(struct tegra_xusb *tegra,
+ struct resource *regs)
{
u32 value;

- value = ipfs_readl(tegra, IPFS_XUSB_HOST_CONFIGURATION_0);
- value |= IPFS_EN_FPCI;
- ipfs_writel(tegra, value, IPFS_XUSB_HOST_CONFIGURATION_0);
+ if (tegra->soc->has_ipfs) {
+ value = ipfs_readl(tegra, IPFS_XUSB_HOST_CONFIGURATION_0);
+ value |= IPFS_EN_FPCI;
+ ipfs_writel(tegra, value, IPFS_XUSB_HOST_CONFIGURATION_0);

- usleep_range(10, 20);
+ usleep_range(10, 20);
+ }

/* Program BAR0 space */
value = fpci_readl(tegra, XUSB_CFG_4);
@@ -661,13 +664,15 @@ static void tegra_xusb_ipfs_config(struct tegra_xusb *tegra,
value |= XUSB_IO_SPACE_EN | XUSB_MEM_SPACE_EN | XUSB_BUS_MASTER_EN;
fpci_writel(tegra, value, XUSB_CFG_1);

- /* Enable interrupt assertion */
- value = ipfs_readl(tegra, IPFS_XUSB_HOST_INTR_MASK_0);
- value |= IPFS_IP_INT_MASK;
- ipfs_writel(tegra, value, IPFS_XUSB_HOST_INTR_MASK_0);
+ if (tegra->soc->has_ipfs) {
+ /* Enable interrupt assertion */
+ value = ipfs_readl(tegra, IPFS_XUSB_HOST_INTR_MASK_0);
+ value |= IPFS_IP_INT_MASK;
+ ipfs_writel(tegra, value, IPFS_XUSB_HOST_INTR_MASK_0);

- /* Set hysteresis */
- ipfs_writel(tegra, 0x80, IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0);
+ /* Set hysteresis */
+ ipfs_writel(tegra, 0x80, IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0);
+ }
}

static int tegra_xusb_clk_enable(struct tegra_xusb *tegra)
@@ -1015,10 +1020,12 @@ static int tegra_xusb_probe(struct platform_device *pdev)
if (IS_ERR(tegra->fpci_base))
return PTR_ERR(tegra->fpci_base);

- res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
- tegra->ipfs_base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(tegra->ipfs_base))
- return PTR_ERR(tegra->ipfs_base);
+ if (tegra->soc->has_ipfs) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ tegra->ipfs_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(tegra->ipfs_base))
+ return PTR_ERR(tegra->ipfs_base);
+ }

tegra->xhci_irq = platform_get_irq(pdev, 0);
if (tegra->xhci_irq < 0)
@@ -1208,7 +1215,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
goto disable_rpm;
}

- tegra_xusb_ipfs_config(tegra, regs);
+ tegra_xusb_config(tegra, regs);

err = tegra_xusb_load_firmware(tegra);
if (err < 0) {
@@ -1380,6 +1387,7 @@ static const struct tegra_xusb_soc tegra124_soc = {
.usb3 = { .offset = 0, .count = 2, },
},
.scale_ss_clock = true,
+ .has_ipfs = true,
};
MODULE_FIRMWARE("nvidia/tegra124/xusb.bin");

@@ -1411,6 +1419,7 @@ static const struct tegra_xusb_soc tegra210_soc = {
.usb3 = { .offset = 0, .count = 4, },
},
.scale_ss_clock = false,
+ .has_ipfs = true,
};
MODULE_FIRMWARE("nvidia/tegra210/xusb.bin");

--
2.21.0
\
 
 \ /
  Last update: 2019-04-01 12:41    [W:0.133 / U:0.500 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site