diff options
author | Dmitry Osipenko <digetx@gmail.com> | 2018-04-13 13:33:54 +0200 |
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committer | Thierry Reding <treding@nvidia.com> | 2018-04-30 10:12:21 +0200 |
commit | cb557757e1aace04fbfb94ab731c3cf7e33b95f8 (patch) | |
tree | 7c1f8689bdc35005185ca56a8c2bd64868325e3d /drivers/memory/tegra | |
parent | memory: tegra: Introduce memory client hot reset (diff) | |
download | linux-cb557757e1aace04fbfb94ab731c3cf7e33b95f8.tar.xz linux-cb557757e1aace04fbfb94ab731c3cf7e33b95f8.zip |
memory: tegra: Add Tegra20 memory controller hot resets
Define the table of memory controller hot resets for Tegra20 and add
specific to Tegra20 hot reset operations.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/memory/tegra')
-rw-r--r-- | drivers/memory/tegra/tegra20.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/drivers/memory/tegra/tegra20.c b/drivers/memory/tegra/tegra20.c index 512a3418cb80..7119e532471c 100644 --- a/drivers/memory/tegra/tegra20.c +++ b/drivers/memory/tegra/tegra20.c @@ -6,6 +6,8 @@ * published by the Free Software Foundation. */ +#include <dt-bindings/memory/tegra20-mc.h> + #include "mc.h" static const struct tegra_mc_client tegra20_mc_clients[] = { @@ -168,6 +170,119 @@ static const struct tegra_mc_client tegra20_mc_clients[] = { }, }; +#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 terga20_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 terga20_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 terga20_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 terga20_mc_dma_idling(struct tegra_mc *mc, + const struct tegra_mc_reset *rst) +{ + return mc_readl(mc, rst->status) == 0; +} + +static int terga20_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 terga20_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; +} + +const struct tegra_mc_reset_ops terga20_mc_reset_ops = { + .hotreset_assert = terga20_mc_hotreset_assert, + .hotreset_deassert = terga20_mc_hotreset_deassert, + .block_dma = terga20_mc_block_dma, + .dma_idling = terga20_mc_dma_idling, + .unblock_dma = terga20_mc_unblock_dma, + .reset_status = terga20_mc_reset_status, +}; + const struct tegra_mc_soc tegra20_mc_soc = { .clients = tegra20_mc_clients, .num_clients = ARRAY_SIZE(tegra20_mc_clients), @@ -175,4 +290,7 @@ const struct tegra_mc_soc tegra20_mc_soc = { .client_id_mask = 0x3f, .intmask = MC_INT_SECURITY_VIOLATION | MC_INT_INVALID_GART_PAGE | MC_INT_DECERR_EMEM, + .reset_ops = &terga20_mc_reset_ops, + .resets = tegra20_mc_resets, + .num_resets = ARRAY_SIZE(tegra20_mc_resets), }; |