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usb: host: xhci-tegra: Add XUSB controller context
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Define the offsets of the registers that need to be saved on suspend and
restored on resume for the various NVIDIA Tegra generations supported by
the XUSB driver.

Based on work by JC Kuo <jckuo@nvidia.com>.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-10-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Thierry Reding authored and Greg Kroah-Hartman committed Dec 10, 2019
1 parent 5c4e8d3 commit 9ccae88
Showing 1 changed file with 69 additions and 11 deletions.
80 changes: 69 additions & 11 deletions drivers/usb/host/xhci-tegra.c
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,15 @@
#define XUSB_CFG_4 0x010
#define XUSB_BASE_ADDR_SHIFT 15
#define XUSB_BASE_ADDR_MASK 0x1ffff
#define XUSB_CFG_16 0x040
#define XUSB_CFG_24 0x060
#define XUSB_CFG_AXI_CFG 0x0f8
#define XUSB_CFG_ARU_C11_CSBRANGE 0x41c
#define XUSB_CFG_ARU_CONTEXT 0x43c
#define XUSB_CFG_ARU_CONTEXT_HS_PLS 0x478
#define XUSB_CFG_ARU_CONTEXT_FS_PLS 0x47c
#define XUSB_CFG_ARU_CONTEXT_HSFS_SPEED 0x480
#define XUSB_CFG_ARU_CONTEXT_HSFS_PP 0x484
#define XUSB_CFG_CSB_BASE_ADDR 0x800

/* FPCI mailbox registers */
Expand All @@ -63,11 +71,20 @@
#define MBOX_SMI_INTR_EN BIT(3)

/* IPFS registers */
#define IPFS_XUSB_HOST_MSI_BAR_SZ_0 0x0c0
#define IPFS_XUSB_HOST_MSI_AXI_BAR_ST_0 0x0c4
#define IPFS_XUSB_HOST_MSI_FPCI_BAR_ST_0 0x0c8
#define IPFS_XUSB_HOST_MSI_VEC0_0 0x100
#define IPFS_XUSB_HOST_MSI_EN_VEC0_0 0x140
#define IPFS_XUSB_HOST_CONFIGURATION_0 0x180
#define IPFS_EN_FPCI BIT(0)
#define IPFS_XUSB_HOST_FPCI_ERROR_MASKS_0 0x184
#define IPFS_XUSB_HOST_INTR_MASK_0 0x188
#define IPFS_IP_INT_MASK BIT(16)
#define IPFS_XUSB_HOST_INTR_ENABLE_0 0x198
#define IPFS_XUSB_HOST_UFPCI_CONFIG_0 0x19c
#define IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0 0x1bc
#define IPFS_XUSB_HOST_MCCIF_FIFOCTRL_0 0x1dc

#define CSB_PAGE_SELECT_MASK 0x7fffff
#define CSB_PAGE_SELECT_SHIFT 9
Expand Down Expand Up @@ -821,13 +838,6 @@ static int tegra_xusb_init_context(struct tegra_xusb *tegra)
{
const struct tegra_xusb_context_soc *soc = tegra->soc->context;

/*
* Skip support for context save/restore if the SoC doesn't have any
* XUSB specific context that needs to be saved/restored.
*/
if (!soc)
return 0;

tegra->context.ipfs = devm_kcalloc(tegra->dev, soc->ipfs.num_offsets,
sizeof(u32), GFP_KERNEL);
if (!tegra->context.ipfs)
Expand Down Expand Up @@ -1443,12 +1453,12 @@ static void tegra_xusb_save_context(struct tegra_xusb *tegra)
struct tegra_xusb_context *ctx = &tegra->context;
unsigned int i;

if (soc && soc->ipfs.num_offsets > 0) {
if (soc->ipfs.num_offsets > 0) {
for (i = 0; i < soc->ipfs.num_offsets; i++)
ctx->ipfs[i] = ipfs_readl(tegra, soc->ipfs.offsets[i]);
}

if (soc && soc->fpci.num_offsets > 0) {
if (soc->fpci.num_offsets > 0) {
for (i = 0; i < soc->fpci.num_offsets; i++)
ctx->fpci[i] = fpci_readl(tegra, soc->fpci.offsets[i]);
}
Expand All @@ -1460,12 +1470,12 @@ static void tegra_xusb_restore_context(struct tegra_xusb *tegra)
struct tegra_xusb_context *ctx = &tegra->context;
unsigned int i;

if (soc && soc->fpci.num_offsets > 0) {
if (soc->fpci.num_offsets > 0) {
for (i = 0; i < soc->fpci.num_offsets; i++)
fpci_writel(tegra, ctx->fpci[i], soc->fpci.offsets[i]);
}

if (soc && soc->ipfs.num_offsets > 0) {
if (soc->ipfs.num_offsets > 0) {
for (i = 0; i < soc->ipfs.num_offsets; i++)
ipfs_writel(tegra, ctx->ipfs[i], soc->ipfs.offsets[i]);
}
Expand Down Expand Up @@ -1522,12 +1532,50 @@ static const struct tegra_xusb_phy_type tegra124_phy_types[] = {
{ .name = "hsic", .num = 2, },
};

static const unsigned int tegra124_xusb_context_ipfs[] = {
IPFS_XUSB_HOST_MSI_BAR_SZ_0,
IPFS_XUSB_HOST_MSI_BAR_SZ_0,
IPFS_XUSB_HOST_MSI_AXI_BAR_ST_0,
IPFS_XUSB_HOST_MSI_FPCI_BAR_ST_0,
IPFS_XUSB_HOST_MSI_VEC0_0,
IPFS_XUSB_HOST_MSI_EN_VEC0_0,
IPFS_XUSB_HOST_FPCI_ERROR_MASKS_0,
IPFS_XUSB_HOST_INTR_MASK_0,
IPFS_XUSB_HOST_INTR_ENABLE_0,
IPFS_XUSB_HOST_UFPCI_CONFIG_0,
IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0,
IPFS_XUSB_HOST_MCCIF_FIFOCTRL_0,
};

static const unsigned int tegra124_xusb_context_fpci[] = {
XUSB_CFG_ARU_CONTEXT_HS_PLS,
XUSB_CFG_ARU_CONTEXT_FS_PLS,
XUSB_CFG_ARU_CONTEXT_HSFS_SPEED,
XUSB_CFG_ARU_CONTEXT_HSFS_PP,
XUSB_CFG_ARU_CONTEXT,
XUSB_CFG_AXI_CFG,
XUSB_CFG_24,
XUSB_CFG_16,
};

static const struct tegra_xusb_context_soc tegra124_xusb_context = {
.ipfs = {
.num_offsets = ARRAY_SIZE(tegra124_xusb_context_ipfs),
.offsets = tegra124_xusb_context_ipfs,
},
.fpci = {
.num_offsets = ARRAY_SIZE(tegra124_xusb_context_fpci),
.offsets = tegra124_xusb_context_fpci,
},
};

static const struct tegra_xusb_soc tegra124_soc = {
.firmware = "nvidia/tegra124/xusb.bin",
.supply_names = tegra124_supply_names,
.num_supplies = ARRAY_SIZE(tegra124_supply_names),
.phy_types = tegra124_phy_types,
.num_types = ARRAY_SIZE(tegra124_phy_types),
.context = &tegra124_xusb_context,
.ports = {
.usb2 = { .offset = 4, .count = 4, },
.hsic = { .offset = 6, .count = 2, },
Expand Down Expand Up @@ -1566,6 +1614,7 @@ static const struct tegra_xusb_soc tegra210_soc = {
.num_supplies = ARRAY_SIZE(tegra210_supply_names),
.phy_types = tegra210_phy_types,
.num_types = ARRAY_SIZE(tegra210_phy_types),
.context = &tegra124_xusb_context,
.ports = {
.usb2 = { .offset = 4, .count = 4, },
.hsic = { .offset = 8, .count = 1, },
Expand All @@ -1591,12 +1640,20 @@ static const struct tegra_xusb_phy_type tegra186_phy_types[] = {
{ .name = "hsic", .num = 1, },
};

static const struct tegra_xusb_context_soc tegra186_xusb_context = {
.fpci = {
.num_offsets = ARRAY_SIZE(tegra124_xusb_context_fpci),
.offsets = tegra124_xusb_context_fpci,
},
};

static const struct tegra_xusb_soc tegra186_soc = {
.firmware = "nvidia/tegra186/xusb.bin",
.supply_names = tegra186_supply_names,
.num_supplies = ARRAY_SIZE(tegra186_supply_names),
.phy_types = tegra186_phy_types,
.num_types = ARRAY_SIZE(tegra186_phy_types),
.context = &tegra186_xusb_context,
.ports = {
.usb3 = { .offset = 0, .count = 3, },
.usb2 = { .offset = 3, .count = 3, },
Expand Down Expand Up @@ -1626,6 +1683,7 @@ static const struct tegra_xusb_soc tegra194_soc = {
.num_supplies = ARRAY_SIZE(tegra194_supply_names),
.phy_types = tegra194_phy_types,
.num_types = ARRAY_SIZE(tegra194_phy_types),
.context = &tegra186_xusb_context,
.ports = {
.usb3 = { .offset = 0, .count = 4, },
.usb2 = { .offset = 4, .count = 4, },
Expand Down

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