diff options
Diffstat (limited to 'drivers/memory/tegra/tegra20.c')
| -rw-r--r-- | drivers/memory/tegra/tegra20.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/drivers/memory/tegra/tegra20.c b/drivers/memory/tegra/tegra20.c new file mode 100644 index 000000000..a8098bff9 --- /dev/null +++ b/drivers/memory/tegra/tegra20.c @@ -0,0 +1,293 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved. + */ + +#include <dt-bindings/memory/tegra20-mc.h> + +#include "mc.h" + +static const struct tegra_mc_client tegra20_mc_clients[] = { + { + .id = 0x00, + .name = "display0a", + }, { + .id = 0x01, + .name = "display0ab", + }, { + .id = 0x02, + .name = "display0b", + }, { + .id = 0x03, + .name = "display0bb", + }, { + .id = 0x04, + .name = "display0c", + }, { + .id = 0x05, + .name = "display0cb", + }, { + .id = 0x06, + .name = "display1b", + }, { + .id = 0x07, + .name = "display1bb", + }, { + .id = 0x08, + .name = "eppup", + }, { + .id = 0x09, + .name = "g2pr", + }, { + .id = 0x0a, + .name = "g2sr", + }, { + .id = 0x0b, + .name = "mpeunifbr", + }, { + .id = 0x0c, + .name = "viruv", + }, { + .id = 0x0d, + .name = "avpcarm7r", + }, { + .id = 0x0e, + .name = "displayhc", + }, { + .id = 0x0f, + .name = "displayhcb", + }, { + .id = 0x10, + .name = "fdcdrd", + }, { + .id = 0x11, + .name = "g2dr", + }, { + .id = 0x12, + .name = "host1xdmar", + }, { + .id = 0x13, + .name = "host1xr", + }, { + .id = 0x14, + .name = "idxsrd", + }, { + .id = 0x15, + .name = "mpcorer", + }, { + .id = 0x16, + .name = "mpe_ipred", + }, { + .id = 0x17, + .name = "mpeamemrd", + }, { + .id = 0x18, + .name = "mpecsrd", + }, { + .id = 0x19, + .name = "ppcsahbdmar", + }, { + .id = 0x1a, + .name = "ppcsahbslvr", + }, { + .id = 0x1b, + .name = "texsrd", + }, { + .id = 0x1c, + .name = "vdebsevr", + }, { + .id = 0x1d, + .name = "vdember", + }, { + .id = 0x1e, + .name = "vdemcer", + }, { + .id = 0x1f, + .name = "vdetper", + }, { + .id = 0x20, + .name = "eppu", + }, { + .id = 0x21, + .name = "eppv", + }, { + .id = 0x22, + .name = "eppy", + }, { + .id = 0x23, + .name = "mpeunifbw", + }, { + .id = 0x24, + .name = "viwsb", + }, { + .id = 0x25, + .name = "viwu", + }, { + .id = 0x26, + .name = "viwv", + }, { + .id = 0x27, + .name = "viwy", + }, { + .id = 0x28, + .name = "g2dw", + }, { + .id = 0x29, + .name = "avpcarm7w", + }, { + .id = 0x2a, + .name = "fdcdwr", + }, { + .id = 0x2b, + .name = "host1xw", + }, { + .id = 0x2c, + .name = "ispw", + }, { + .id = 0x2d, + .name = "mpcorew", + }, { + .id = 0x2e, + .name = "mpecswr", + }, { + .id = 0x2f, + .name = "ppcsahbdmaw", + }, { + .id = 0x30, + .name = "ppcsahbslvw", + }, { + .id = 0x31, + .name = "vdebsevw", + }, { + .id = 0x32, + .name = "vdembew", + }, { + .id = 0x33, + .name = "vdetpmw", + }, +}; + +#define TEGRA20_MC_RESET(_name, _control, _status, _reset, _bit) \ + { \ + .name = #_name, \ + .id = TEGRA20_MC_RESET_##_name, \ + .control = _control, \ + .status = _status, \ + .reset = _reset, \ + .bit = _bit, \ + } + +static const struct tegra_mc_reset tegra20_mc_resets[] = { + TEGRA20_MC_RESET(AVPC, 0x100, 0x140, 0x104, 0), + TEGRA20_MC_RESET(DC, 0x100, 0x144, 0x104, 1), + TEGRA20_MC_RESET(DCB, 0x100, 0x148, 0x104, 2), + TEGRA20_MC_RESET(EPP, 0x100, 0x14c, 0x104, 3), + TEGRA20_MC_RESET(2D, 0x100, 0x150, 0x104, 4), + TEGRA20_MC_RESET(HC, 0x100, 0x154, 0x104, 5), + TEGRA20_MC_RESET(ISP, 0x100, 0x158, 0x104, 6), + TEGRA20_MC_RESET(MPCORE, 0x100, 0x15c, 0x104, 7), + TEGRA20_MC_RESET(MPEA, 0x100, 0x160, 0x104, 8), + TEGRA20_MC_RESET(MPEB, 0x100, 0x164, 0x104, 9), + TEGRA20_MC_RESET(MPEC, 0x100, 0x168, 0x104, 10), + TEGRA20_MC_RESET(3D, 0x100, 0x16c, 0x104, 11), + TEGRA20_MC_RESET(PPCS, 0x100, 0x170, 0x104, 12), + TEGRA20_MC_RESET(VDE, 0x100, 0x174, 0x104, 13), + TEGRA20_MC_RESET(VI, 0x100, 0x178, 0x104, 14), +}; + +static int tegra20_mc_hotreset_assert(struct tegra_mc *mc, + const struct tegra_mc_reset *rst) +{ + unsigned long flags; + u32 value; + + spin_lock_irqsave(&mc->lock, flags); + + value = mc_readl(mc, rst->reset); + mc_writel(mc, value & ~BIT(rst->bit), rst->reset); + + spin_unlock_irqrestore(&mc->lock, flags); + + return 0; +} + +static int tegra20_mc_hotreset_deassert(struct tegra_mc *mc, + const struct tegra_mc_reset *rst) +{ + unsigned long flags; + u32 value; + + spin_lock_irqsave(&mc->lock, flags); + + value = mc_readl(mc, rst->reset); + mc_writel(mc, value | BIT(rst->bit), rst->reset); + + spin_unlock_irqrestore(&mc->lock, flags); + + return 0; +} + +static int tegra20_mc_block_dma(struct tegra_mc *mc, + const struct tegra_mc_reset *rst) +{ + unsigned long flags; + u32 value; + + spin_lock_irqsave(&mc->lock, flags); + + value = mc_readl(mc, rst->control) & ~BIT(rst->bit); + mc_writel(mc, value, rst->control); + + spin_unlock_irqrestore(&mc->lock, flags); + + return 0; +} + +static bool tegra20_mc_dma_idling(struct tegra_mc *mc, + const struct tegra_mc_reset *rst) +{ + return mc_readl(mc, rst->status) == 0; +} + +static int tegra20_mc_reset_status(struct tegra_mc *mc, + const struct tegra_mc_reset *rst) +{ + return (mc_readl(mc, rst->reset) & BIT(rst->bit)) == 0; +} + +static int tegra20_mc_unblock_dma(struct tegra_mc *mc, + const struct tegra_mc_reset *rst) +{ + unsigned long flags; + u32 value; + + spin_lock_irqsave(&mc->lock, flags); + + value = mc_readl(mc, rst->control) | BIT(rst->bit); + mc_writel(mc, value, rst->control); + + spin_unlock_irqrestore(&mc->lock, flags); + + return 0; +} + +static const struct tegra_mc_reset_ops tegra20_mc_reset_ops = { + .hotreset_assert = tegra20_mc_hotreset_assert, + .hotreset_deassert = tegra20_mc_hotreset_deassert, + .block_dma = tegra20_mc_block_dma, + .dma_idling = tegra20_mc_dma_idling, + .unblock_dma = tegra20_mc_unblock_dma, + .reset_status = tegra20_mc_reset_status, +}; + +const struct tegra_mc_soc tegra20_mc_soc = { + .clients = tegra20_mc_clients, + .num_clients = ARRAY_SIZE(tegra20_mc_clients), + .num_address_bits = 32, + .client_id_mask = 0x3f, + .intmask = MC_INT_SECURITY_VIOLATION | MC_INT_INVALID_GART_PAGE | + MC_INT_DECERR_EMEM, + .reset_ops = &tegra20_mc_reset_ops, + .resets = tegra20_mc_resets, + .num_resets = ARRAY_SIZE(tegra20_mc_resets), +}; 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