X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=drivers%2Fspi%2Fspi-imx.c;h=8ac6542aedcd390fb5b1afb16c417dc4076fd8e7;hp=615a84c8ccdac9e588cf65a86953b961118f475f;hb=8181780c163e7111f15619067cfa044172d532e1;hpb=2a64a90a2c64420e880b25dfeec6524ea78926fb diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 615a84c8ccda..8ac6542aedcd 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -34,6 +34,9 @@ #include #include #include +#include +#include +#include #include @@ -57,10 +60,12 @@ struct spi_imx_config { }; enum spi_imx_devtype { - SPI_IMX_VER_IMX1, - SPI_IMX_VER_0_0, - SPI_IMX_VER_0_4, - SPI_IMX_VER_2_3, + IMX1_CSPI, + IMX21_CSPI, + IMX27_CSPI, + IMX31_CSPI, + IMX35_CSPI, /* CSPI on all i.mx except above */ + IMX51_ECSPI, /* ECSPI on i.mx51 and later */ }; struct spi_imx_data; @@ -71,7 +76,7 @@ struct spi_imx_devtype_data { void (*trigger)(struct spi_imx_data *); int (*rx_available)(struct spi_imx_data *); void (*reset)(struct spi_imx_data *); - unsigned int fifosize; + enum spi_imx_devtype devtype; }; struct spi_imx_data { @@ -82,7 +87,6 @@ struct spi_imx_data { int irq; struct clk *clk; unsigned long spi_clk; - int *chipselect; unsigned int count; void (*tx)(struct spi_imx_data *); @@ -92,8 +96,24 @@ struct spi_imx_data { unsigned int txfifo; /* number of words pushed in tx FIFO */ struct spi_imx_devtype_data *devtype_data; + int chipselect[0]; }; +static inline int is_imx27_cspi(struct spi_imx_data *d) +{ + return d->devtype_data->devtype == IMX27_CSPI; +} + +static inline int is_imx35_cspi(struct spi_imx_data *d) +{ + return d->devtype_data->devtype == IMX35_CSPI; +} + +static inline unsigned spi_imx_get_fifosize(struct spi_imx_data *d) +{ + return (d->devtype_data->devtype == IMX51_ECSPI) ? 64 : 8; +} + #define MXC_SPI_BUF_RX(type) \ static void spi_imx_buf_rx_##type(struct spi_imx_data *spi_imx) \ { \ @@ -135,14 +155,9 @@ static int mxc_clkdivs[] = {0, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, /* MX21, MX27 */ static unsigned int spi_imx_clkdiv_1(unsigned int fin, - unsigned int fspi) + unsigned int fspi, unsigned int max) { - int i, max; - - if (cpu_is_mx21()) - max = 18; - else - max = 16; + int i; for (i = 2; i < max; i++) if (fspi * mxc_clkdivs[i] >= fin) @@ -347,7 +362,7 @@ static int __maybe_unused mx31_config(struct spi_imx_data *spi_imx, reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) << MX31_CSPICTRL_DR_SHIFT; - if (cpu_is_mx35()) { + if (is_imx35_cspi(spi_imx)) { reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT; reg |= MX31_CSPICTRL_SSCTL; } else { @@ -362,8 +377,8 @@ static int __maybe_unused mx31_config(struct spi_imx_data *spi_imx, reg |= MX31_CSPICTRL_SSPOL; if (cs < 0) reg |= (cs + 32) << - (cpu_is_mx35() ? MX35_CSPICTRL_CS_SHIFT : - MX31_CSPICTRL_CS_SHIFT); + (is_imx35_cspi(spi_imx) ? MX35_CSPICTRL_CS_SHIFT : + MX31_CSPICTRL_CS_SHIFT); writel(reg, spi_imx->base + MXC_CSPICTRL); @@ -421,8 +436,9 @@ static int __maybe_unused mx21_config(struct spi_imx_data *spi_imx, { unsigned int reg = MX21_CSPICTRL_ENABLE | MX21_CSPICTRL_MASTER; int cs = spi_imx->chipselect[config->cs]; + unsigned int max = is_imx27_cspi(spi_imx) ? 16 : 18; - reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, config->speed_hz) << + reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, config->speed_hz, max) << MX21_CSPICTRL_DR_SHIFT; reg |= config->bpw - 1; @@ -511,51 +527,94 @@ static void __maybe_unused mx1_reset(struct spi_imx_data *spi_imx) writel(1, spi_imx->base + MXC_RESET); } -/* - * These version numbers are taken from the Freescale driver. Unfortunately it - * doesn't support i.MX1, so this entry doesn't match the scheme. :-( - */ -static struct spi_imx_devtype_data spi_imx_devtype_data[] = { -#ifdef CONFIG_SPI_IMX_VER_IMX1 - [SPI_IMX_VER_IMX1] = { - .intctrl = mx1_intctrl, - .config = mx1_config, - .trigger = mx1_trigger, - .rx_available = mx1_rx_available, - .reset = mx1_reset, - .fifosize = 8, - }, -#endif -#ifdef CONFIG_SPI_IMX_VER_0_0 - [SPI_IMX_VER_0_0] = { - .intctrl = mx21_intctrl, - .config = mx21_config, - .trigger = mx21_trigger, - .rx_available = mx21_rx_available, - .reset = mx21_reset, - .fifosize = 8, - }, -#endif -#ifdef CONFIG_SPI_IMX_VER_0_4 - [SPI_IMX_VER_0_4] = { - .intctrl = mx31_intctrl, - .config = mx31_config, - .trigger = mx31_trigger, - .rx_available = mx31_rx_available, - .reset = mx31_reset, - .fifosize = 8, - }, -#endif -#ifdef CONFIG_SPI_IMX_VER_2_3 - [SPI_IMX_VER_2_3] = { - .intctrl = mx51_ecspi_intctrl, - .config = mx51_ecspi_config, - .trigger = mx51_ecspi_trigger, - .rx_available = mx51_ecspi_rx_available, - .reset = mx51_ecspi_reset, - .fifosize = 64, - }, -#endif +static struct spi_imx_devtype_data imx1_cspi_devtype_data = { + .intctrl = mx1_intctrl, + .config = mx1_config, + .trigger = mx1_trigger, + .rx_available = mx1_rx_available, + .reset = mx1_reset, + .devtype = IMX1_CSPI, +}; + +static struct spi_imx_devtype_data imx21_cspi_devtype_data = { + .intctrl = mx21_intctrl, + .config = mx21_config, + .trigger = mx21_trigger, + .rx_available = mx21_rx_available, + .reset = mx21_reset, + .devtype = IMX21_CSPI, +}; + +static struct spi_imx_devtype_data imx27_cspi_devtype_data = { + /* i.mx27 cspi shares the functions with i.mx21 one */ + .intctrl = mx21_intctrl, + .config = mx21_config, + .trigger = mx21_trigger, + .rx_available = mx21_rx_available, + .reset = mx21_reset, + .devtype = IMX27_CSPI, +}; + +static struct spi_imx_devtype_data imx31_cspi_devtype_data = { + .intctrl = mx31_intctrl, + .config = mx31_config, + .trigger = mx31_trigger, + .rx_available = mx31_rx_available, + .reset = mx31_reset, + .devtype = IMX31_CSPI, +}; + +static struct spi_imx_devtype_data imx35_cspi_devtype_data = { + /* i.mx35 and later cspi shares the functions with i.mx31 one */ + .intctrl = mx31_intctrl, + .config = mx31_config, + .trigger = mx31_trigger, + .rx_available = mx31_rx_available, + .reset = mx31_reset, + .devtype = IMX35_CSPI, +}; + +static struct spi_imx_devtype_data imx51_ecspi_devtype_data = { + .intctrl = mx51_ecspi_intctrl, + .config = mx51_ecspi_config, + .trigger = mx51_ecspi_trigger, + .rx_available = mx51_ecspi_rx_available, + .reset = mx51_ecspi_reset, + .devtype = IMX51_ECSPI, +}; + +static struct platform_device_id spi_imx_devtype[] = { + { + .name = "imx1-cspi", + .driver_data = (kernel_ulong_t) &imx1_cspi_devtype_data, + }, { + .name = "imx21-cspi", + .driver_data = (kernel_ulong_t) &imx21_cspi_devtype_data, + }, { + .name = "imx27-cspi", + .driver_data = (kernel_ulong_t) &imx27_cspi_devtype_data, + }, { + .name = "imx31-cspi", + .driver_data = (kernel_ulong_t) &imx31_cspi_devtype_data, + }, { + .name = "imx35-cspi", + .driver_data = (kernel_ulong_t) &imx35_cspi_devtype_data, + }, { + .name = "imx51-ecspi", + .driver_data = (kernel_ulong_t) &imx51_ecspi_devtype_data, + }, { + /* sentinel */ + } +}; + +static const struct of_device_id spi_imx_dt_ids[] = { + { .compatible = "fsl,imx1-cspi", .data = &imx1_cspi_devtype_data, }, + { .compatible = "fsl,imx21-cspi", .data = &imx21_cspi_devtype_data, }, + { .compatible = "fsl,imx27-cspi", .data = &imx27_cspi_devtype_data, }, + { .compatible = "fsl,imx31-cspi", .data = &imx31_cspi_devtype_data, }, + { .compatible = "fsl,imx35-cspi", .data = &imx35_cspi_devtype_data, }, + { .compatible = "fsl,imx51-ecspi", .data = &imx51_ecspi_devtype_data, }, + { /* sentinel */ } }; static void spi_imx_chipselect(struct spi_device *spi, int is_active) @@ -573,7 +632,7 @@ static void spi_imx_chipselect(struct spi_device *spi, int is_active) static void spi_imx_push(struct spi_imx_data *spi_imx) { - while (spi_imx->txfifo < spi_imx->devtype_data->fifosize) { + while (spi_imx->txfifo < spi_imx_get_fifosize(spi_imx)) { if (!spi_imx->count) break; spi_imx->tx(spi_imx); @@ -689,72 +748,47 @@ static void spi_imx_cleanup(struct spi_device *spi) { } -static struct platform_device_id spi_imx_devtype[] = { - { - .name = "imx1-cspi", - .driver_data = SPI_IMX_VER_IMX1, - }, { - .name = "imx21-cspi", - .driver_data = SPI_IMX_VER_0_0, - }, { - .name = "imx25-cspi", - .driver_data = SPI_IMX_VER_0_4, - }, { - .name = "imx27-cspi", - .driver_data = SPI_IMX_VER_0_0, - }, { - .name = "imx31-cspi", - .driver_data = SPI_IMX_VER_0_4, - }, { - .name = "imx35-cspi", - .driver_data = SPI_IMX_VER_0_4, - }, { - .name = "imx51-cspi", - .driver_data = SPI_IMX_VER_0_4, - }, { - .name = "imx51-ecspi", - .driver_data = SPI_IMX_VER_2_3, - }, { - .name = "imx53-cspi", - .driver_data = SPI_IMX_VER_0_4, - }, { - .name = "imx53-ecspi", - .driver_data = SPI_IMX_VER_2_3, - }, { - /* sentinel */ - } -}; - static int __devinit spi_imx_probe(struct platform_device *pdev) { - struct spi_imx_master *mxc_platform_info; + struct device_node *np = pdev->dev.of_node; + const struct of_device_id *of_id = + of_match_device(spi_imx_dt_ids, &pdev->dev); + struct spi_imx_master *mxc_platform_info = + dev_get_platdata(&pdev->dev); struct spi_master *master; struct spi_imx_data *spi_imx; struct resource *res; - int i, ret; + int i, ret, num_cs; - mxc_platform_info = dev_get_platdata(&pdev->dev); - if (!mxc_platform_info) { + if (!np && !mxc_platform_info) { dev_err(&pdev->dev, "can't get the platform data\n"); return -EINVAL; } - master = spi_alloc_master(&pdev->dev, sizeof(struct spi_imx_data)); + ret = of_property_read_u32(np, "fsl,spi-num-chipselects", &num_cs); + if (ret < 0) + num_cs = mxc_platform_info->num_chipselect; + + master = spi_alloc_master(&pdev->dev, + sizeof(struct spi_imx_data) + sizeof(int) * num_cs); if (!master) return -ENOMEM; platform_set_drvdata(pdev, master); master->bus_num = pdev->id; - master->num_chipselect = mxc_platform_info->num_chipselect; + master->num_chipselect = num_cs; spi_imx = spi_master_get_devdata(master); spi_imx->bitbang.master = spi_master_get(master); - spi_imx->chipselect = mxc_platform_info->chipselect; for (i = 0; i < master->num_chipselect; i++) { - if (spi_imx->chipselect[i] < 0) + int cs_gpio = of_get_named_gpio(np, "cs-gpios", i); + if (cs_gpio < 0) + cs_gpio = mxc_platform_info->chipselect[i]; + if (cs_gpio < 0) continue; + spi_imx->chipselect[i] = cs_gpio; ret = gpio_request(spi_imx->chipselect[i], DRIVER_NAME); if (ret) { while (i > 0) { @@ -776,8 +810,8 @@ static int __devinit spi_imx_probe(struct platform_device *pdev) init_completion(&spi_imx->xfer_done); - spi_imx->devtype_data = - &spi_imx_devtype_data[pdev->id_entry->driver_data]; + spi_imx->devtype_data = of_id ? of_id->data : + (struct spi_imx_devtype_data *) pdev->id_entry->driver_data; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { @@ -824,6 +858,7 @@ static int __devinit spi_imx_probe(struct platform_device *pdev) spi_imx->devtype_data->intctrl(spi_imx, 0); + master->dev.of_node = pdev->dev.of_node; ret = spi_bitbang_start(&spi_imx->bitbang); if (ret) { dev_err(&pdev->dev, "bitbang start failed with %d\n", ret); @@ -886,6 +921,7 @@ static struct platform_driver spi_imx_driver = { .driver = { .name = DRIVER_NAME, .owner = THIS_MODULE, + .of_match_table = spi_imx_dt_ids, }, .id_table = spi_imx_devtype, .probe = spi_imx_probe,