diff options
Diffstat (limited to 'drivers/spi/spi-mtk-nor.c')
| -rw-r--r-- | drivers/spi/spi-mtk-nor.c | 71 |
1 files changed, 61 insertions, 10 deletions
diff --git a/drivers/spi/spi-mtk-nor.c b/drivers/spi/spi-mtk-nor.c index 5c93730615f8..94fb09696677 100644 --- a/drivers/spi/spi-mtk-nor.c +++ b/drivers/spi/spi-mtk-nor.c @@ -95,6 +95,17 @@ #define CLK_TO_US(sp, clkcnt) DIV_ROUND_UP(clkcnt, sp->spi_freq / 1000000) +struct mtk_nor_caps { + u8 dma_bits; + + /* extra_dummy_bit is adding for the IP of new SoCs. + * Some new SoCs modify the timing of fetching registers' values + * and IDs of nor flash, they need a extra_dummy_bit which can add + * more clock cycles for fetching data. + */ + u8 extra_dummy_bit; +}; + struct mtk_nor { struct spi_controller *ctlr; struct device *dev; @@ -104,11 +115,13 @@ struct mtk_nor { struct clk *spi_clk; struct clk *ctlr_clk; struct clk *axi_clk; + struct clk *axi_s_clk; unsigned int spi_freq; bool wbuf_en; bool has_irq; bool high_dma; struct completion op_done; + const struct mtk_nor_caps *caps; }; static inline void mtk_nor_rmw(struct mtk_nor *sp, u32 reg, u32 set, u32 clr) @@ -554,7 +567,12 @@ static int mtk_nor_spi_mem_prg(struct mtk_nor *sp, const struct spi_mem_op *op) } // trigger op - writel(prg_len * BITS_PER_BYTE, sp->base + MTK_NOR_REG_PRG_CNT); + if (rx_len) + writel(prg_len * BITS_PER_BYTE + sp->caps->extra_dummy_bit, + sp->base + MTK_NOR_REG_PRG_CNT); + else + writel(prg_len * BITS_PER_BYTE, sp->base + MTK_NOR_REG_PRG_CNT); + ret = mtk_nor_cmd_exec(sp, MTK_NOR_CMD_PROGRAM, prg_len * BITS_PER_BYTE); if (ret) @@ -674,6 +692,7 @@ static void mtk_nor_disable_clk(struct mtk_nor *sp) clk_disable_unprepare(sp->spi_clk); clk_disable_unprepare(sp->ctlr_clk); clk_disable_unprepare(sp->axi_clk); + clk_disable_unprepare(sp->axi_s_clk); } static int mtk_nor_enable_clk(struct mtk_nor *sp) @@ -697,6 +716,14 @@ static int mtk_nor_enable_clk(struct mtk_nor *sp) return ret; } + ret = clk_prepare_enable(sp->axi_s_clk); + if (ret) { + clk_disable_unprepare(sp->spi_clk); + clk_disable_unprepare(sp->ctlr_clk); + clk_disable_unprepare(sp->axi_clk); + return ret; + } + return 0; } @@ -743,9 +770,25 @@ static const struct spi_controller_mem_ops mtk_nor_mem_ops = { .exec_op = mtk_nor_exec_op }; +static const struct mtk_nor_caps mtk_nor_caps_mt8173 = { + .dma_bits = 32, + .extra_dummy_bit = 0, +}; + +static const struct mtk_nor_caps mtk_nor_caps_mt8186 = { + .dma_bits = 32, + .extra_dummy_bit = 1, +}; + +static const struct mtk_nor_caps mtk_nor_caps_mt8192 = { + .dma_bits = 36, + .extra_dummy_bit = 0, +}; + static const struct of_device_id mtk_nor_match[] = { - { .compatible = "mediatek,mt8192-nor", .data = (void *)36 }, - { .compatible = "mediatek,mt8173-nor", .data = (void *)32 }, + { .compatible = "mediatek,mt8173-nor", .data = &mtk_nor_caps_mt8173 }, + { .compatible = "mediatek,mt8186-nor", .data = &mtk_nor_caps_mt8186 }, + { .compatible = "mediatek,mt8192-nor", .data = &mtk_nor_caps_mt8192 }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mtk_nor_match); @@ -754,10 +797,10 @@ static int mtk_nor_probe(struct platform_device *pdev) { struct spi_controller *ctlr; struct mtk_nor *sp; + struct mtk_nor_caps *caps; void __iomem *base; - struct clk *spi_clk, *ctlr_clk, *axi_clk; + struct clk *spi_clk, *ctlr_clk, *axi_clk, *axi_s_clk; int ret, irq; - unsigned long dma_bits; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) @@ -775,10 +818,16 @@ static int mtk_nor_probe(struct platform_device *pdev) if (IS_ERR(axi_clk)) return PTR_ERR(axi_clk); - dma_bits = (unsigned long)of_device_get_match_data(&pdev->dev); - if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_bits))) { - dev_err(&pdev->dev, "failed to set dma mask(%lu)\n", dma_bits); - return -EINVAL; + axi_s_clk = devm_clk_get_optional(&pdev->dev, "axi_s"); + if (IS_ERR(axi_s_clk)) + return PTR_ERR(axi_s_clk); + + caps = (struct mtk_nor_caps *)of_device_get_match_data(&pdev->dev); + + ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(caps->dma_bits)); + if (ret) { + dev_err(&pdev->dev, "failed to set dma mask(%u)\n", caps->dma_bits); + return ret; } ctlr = devm_spi_alloc_master(&pdev->dev, sizeof(*sp)); @@ -808,7 +857,9 @@ static int mtk_nor_probe(struct platform_device *pdev) sp->spi_clk = spi_clk; sp->ctlr_clk = ctlr_clk; sp->axi_clk = axi_clk; - sp->high_dma = (dma_bits > 32); + sp->axi_s_clk = axi_s_clk; + sp->caps = caps; + sp->high_dma = caps->dma_bits > 32; sp->buffer = dmam_alloc_coherent(&pdev->dev, MTK_NOR_BOUNCE_BUF_SIZE + MTK_NOR_DMA_ALIGN, &sp->buffer_dma, GFP_KERNEL); |