diff options
Diffstat (limited to 'drivers/memory/tegra/mc.c')
| -rw-r--r-- | drivers/memory/tegra/mc.c | 52 |
1 files changed, 17 insertions, 35 deletions
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index 3d8d322511c5..ec8403557ed4 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -5,6 +5,7 @@ #include <linux/clk.h> #include <linux/delay.h> +#include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> @@ -18,39 +19,6 @@ #include "mc.h" -#define MC_INTSTATUS 0x000 - -#define MC_INTMASK 0x004 - -#define MC_ERR_STATUS 0x08 -#define MC_ERR_STATUS_TYPE_SHIFT 28 -#define MC_ERR_STATUS_TYPE_INVALID_SMMU_PAGE (6 << MC_ERR_STATUS_TYPE_SHIFT) -#define MC_ERR_STATUS_TYPE_MASK (0x7 << MC_ERR_STATUS_TYPE_SHIFT) -#define MC_ERR_STATUS_READABLE (1 << 27) -#define MC_ERR_STATUS_WRITABLE (1 << 26) -#define MC_ERR_STATUS_NONSECURE (1 << 25) -#define MC_ERR_STATUS_ADR_HI_SHIFT 20 -#define MC_ERR_STATUS_ADR_HI_MASK 0x3 -#define MC_ERR_STATUS_SECURITY (1 << 17) -#define MC_ERR_STATUS_RW (1 << 16) - -#define MC_ERR_ADR 0x0c - -#define MC_GART_ERROR_REQ 0x30 -#define MC_DECERR_EMEM_OTHERS_STATUS 0x58 -#define MC_SECURITY_VIOLATION_STATUS 0x74 - -#define MC_EMEM_ARB_CFG 0x90 -#define MC_EMEM_ARB_CFG_CYCLES_PER_UPDATE(x) (((x) & 0x1ff) << 0) -#define MC_EMEM_ARB_CFG_CYCLES_PER_UPDATE_MASK 0x1ff -#define MC_EMEM_ARB_MISC0 0xd8 - -#define MC_EMEM_ADR_CFG 0x54 -#define MC_EMEM_ADR_CFG_EMEM_NUMDEV BIT(0) - -#define MC_TIMING_CONTROL 0xfc -#define MC_TIMING_UPDATE BIT(0) - static const struct of_device_id tegra_mc_of_match[] = { #ifdef CONFIG_ARCH_TEGRA_2x_SOC { .compatible = "nvidia,tegra20-mc-gart", .data = &tegra20_mc_soc }, @@ -307,7 +275,7 @@ static int tegra_mc_setup_latency_allowance(struct tegra_mc *mc) return 0; } -void tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate) +int tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate) { unsigned int i; struct tegra_mc_timing *timing = NULL; @@ -322,11 +290,13 @@ void tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate) if (!timing) { dev_err(mc->dev, "no memory timing registered for rate %lu\n", rate); - return; + return -EINVAL; } for (i = 0; i < mc->soc->num_emem_regs; ++i) mc_writel(mc, timing->emem_data[i], mc->soc->emem_regs[i]); + + return 0; } unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc) @@ -626,6 +596,7 @@ static int tegra_mc_probe(struct platform_device *pdev) struct resource *res; struct tegra_mc *mc; void *isr; + u64 mask; int err; mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL); @@ -637,6 +608,14 @@ static int tegra_mc_probe(struct platform_device *pdev) mc->soc = of_device_get_match_data(&pdev->dev); mc->dev = &pdev->dev; + mask = DMA_BIT_MASK(mc->soc->num_address_bits); + + err = dma_coerce_mask_and_coherent(&pdev->dev, mask); + if (err < 0) { + dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err); + return err; + } + /* length of MC tick in nanoseconds */ mc->tick = 30; @@ -658,6 +637,9 @@ static int tegra_mc_probe(struct platform_device *pdev) } else #endif { + /* ensure that debug features are disabled */ + mc_writel(mc, 0x00000000, MC_TIMING_CONTROL_DBG); + err = tegra_mc_setup_latency_allowance(mc); if (err < 0) { dev_err(&pdev->dev, |