diff options
Diffstat (limited to 'drivers/crypto/amcc/crypto4xx_core.c')
| -rw-r--r-- | drivers/crypto/amcc/crypto4xx_core.c | 48 |
1 files changed, 43 insertions, 5 deletions
diff --git a/drivers/crypto/amcc/crypto4xx_core.c b/drivers/crypto/amcc/crypto4xx_core.c index 50d5e64fbdbf..fde0136029f1 100644 --- a/drivers/crypto/amcc/crypto4xx_core.c +++ b/drivers/crypto/amcc/crypto4xx_core.c @@ -128,7 +128,14 @@ static void crypto4xx_hw_init(struct crypto4xx_device *dev) writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT); writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT); writel(PPC4XX_INT_CFG, dev->ce_base + CRYPTO4XX_INT_CFG); - writel(PPC4XX_PD_DONE_INT, dev->ce_base + CRYPTO4XX_INT_EN); + if (dev->is_revb) { + writel(PPC4XX_INT_TIMEOUT_CNT_REVB << 10, + dev->ce_base + CRYPTO4XX_INT_TIMEOUT_CNT); + writel(PPC4XX_PD_DONE_INT | PPC4XX_TMO_ERR_INT, + dev->ce_base + CRYPTO4XX_INT_EN); + } else { + writel(PPC4XX_PD_DONE_INT, dev->ce_base + CRYPTO4XX_INT_EN); + } } int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size) @@ -1070,18 +1077,29 @@ static void crypto4xx_bh_tasklet_cb(unsigned long data) /** * Top Half of isr. */ -static irqreturn_t crypto4xx_ce_interrupt_handler(int irq, void *data) +static inline irqreturn_t crypto4xx_interrupt_handler(int irq, void *data, + u32 clr_val) { struct device *dev = (struct device *)data; struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev); - writel(PPC4XX_INTERRUPT_CLR, - core_dev->dev->ce_base + CRYPTO4XX_INT_CLR); + writel(clr_val, core_dev->dev->ce_base + CRYPTO4XX_INT_CLR); tasklet_schedule(&core_dev->tasklet); return IRQ_HANDLED; } +static irqreturn_t crypto4xx_ce_interrupt_handler(int irq, void *data) +{ + return crypto4xx_interrupt_handler(irq, data, PPC4XX_INTERRUPT_CLR); +} + +static irqreturn_t crypto4xx_ce_interrupt_handler_revb(int irq, void *data) +{ + return crypto4xx_interrupt_handler(irq, data, PPC4XX_INTERRUPT_CLR | + PPC4XX_TMO_ERR_INT); +} + /** * Supported Crypto Algorithms */ @@ -1263,6 +1281,8 @@ static int crypto4xx_probe(struct platform_device *ofdev) struct resource res; struct device *dev = &ofdev->dev; struct crypto4xx_core_device *core_dev; + u32 pvr; + bool is_revb = true; rc = of_address_to_resource(ofdev->dev.of_node, 0, &res); if (rc) @@ -1279,6 +1299,7 @@ static int crypto4xx_probe(struct platform_device *ofdev) mfdcri(SDR0, PPC405EX_SDR0_SRST) | PPC405EX_CE_RESET); mtdcri(SDR0, PPC405EX_SDR0_SRST, mfdcri(SDR0, PPC405EX_SDR0_SRST) & ~PPC405EX_CE_RESET); + is_revb = false; } else if (of_find_compatible_node(NULL, NULL, "amcc,ppc460sx-crypto")) { mtdcri(SDR0, PPC460SX_SDR0_SRST, @@ -1301,7 +1322,22 @@ static int crypto4xx_probe(struct platform_device *ofdev) if (!core_dev->dev) goto err_alloc_dev; + /* + * Older version of 460EX/GT have a hardware bug. + * Hence they do not support H/W based security intr coalescing + */ + pvr = mfspr(SPRN_PVR); + if (is_revb && ((pvr >> 4) == 0x130218A)) { + u32 min = PVR_MIN(pvr); + + if (min < 4) { + dev_info(dev, "RevA detected - disable interrupt coalescing\n"); + is_revb = false; + } + } + core_dev->dev->core_dev = core_dev; + core_dev->dev->is_revb = is_revb; core_dev->device = dev; spin_lock_init(&core_dev->lock); INIT_LIST_HEAD(&core_dev->dev->alg_list); @@ -1331,7 +1367,9 @@ static int crypto4xx_probe(struct platform_device *ofdev) /* Register for Crypto isr, Crypto Engine IRQ */ core_dev->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0); - rc = request_irq(core_dev->irq, crypto4xx_ce_interrupt_handler, 0, + rc = request_irq(core_dev->irq, is_revb ? + crypto4xx_ce_interrupt_handler_revb : + crypto4xx_ce_interrupt_handler, 0, core_dev->dev->name, dev); if (rc) goto err_request_irq; |