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https://github.com/edk2-porting/linux-next.git
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348 lines
8.1 KiB
C
348 lines
8.1 KiB
C
/*
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* Hawkboard.org based on TI's OMAP-L138 Platform
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*
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* Initial code: Syed Mohammed Khasim
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*
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* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of
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* any kind, whether express or implied.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/gpio.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <mach/cp_intc.h>
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#include <mach/da8xx.h>
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#include <mach/mux.h>
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#define HAWKBOARD_PHY_ID "0:07"
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#define DA850_HAWK_MMCSD_CD_PIN GPIO_TO_PIN(3, 12)
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#define DA850_HAWK_MMCSD_WP_PIN GPIO_TO_PIN(3, 13)
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#define DA850_USB1_VBUS_PIN GPIO_TO_PIN(2, 4)
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#define DA850_USB1_OC_PIN GPIO_TO_PIN(6, 13)
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static short omapl138_hawk_mii_pins[] __initdata = {
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DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
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DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
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DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
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DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
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DA850_MDIO_D,
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-1
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};
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static __init void omapl138_hawk_config_emac(void)
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{
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void __iomem *cfgchip3 = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
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int ret;
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u32 val;
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struct davinci_soc_info *soc_info = &davinci_soc_info;
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val = __raw_readl(cfgchip3);
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val &= ~BIT(8);
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ret = davinci_cfg_reg_list(omapl138_hawk_mii_pins);
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if (ret) {
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pr_warning("%s: cpgmac/mii mux setup failed: %d\n",
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__func__, ret);
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return;
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}
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/* configure the CFGCHIP3 register for MII */
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__raw_writel(val, cfgchip3);
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pr_info("EMAC: MII PHY configured\n");
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soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;
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ret = da8xx_register_emac();
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if (ret)
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pr_warning("%s: emac registration failed: %d\n",
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__func__, ret);
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}
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/*
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* The following EDMA channels/slots are not being used by drivers (for
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* example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
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* hence they are being reserved for codecs on the DSP side.
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*/
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static const s16 da850_dma0_rsv_chans[][2] = {
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/* (offset, number) */
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{ 8, 6},
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{24, 4},
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{30, 2},
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{-1, -1}
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};
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static const s16 da850_dma0_rsv_slots[][2] = {
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/* (offset, number) */
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{ 8, 6},
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{24, 4},
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{30, 50},
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{-1, -1}
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};
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static const s16 da850_dma1_rsv_chans[][2] = {
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/* (offset, number) */
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{ 0, 28},
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{30, 2},
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{-1, -1}
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};
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static const s16 da850_dma1_rsv_slots[][2] = {
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/* (offset, number) */
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{ 0, 28},
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{30, 90},
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{-1, -1}
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};
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static struct edma_rsv_info da850_edma_cc0_rsv = {
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.rsv_chans = da850_dma0_rsv_chans,
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.rsv_slots = da850_dma0_rsv_slots,
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};
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static struct edma_rsv_info da850_edma_cc1_rsv = {
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.rsv_chans = da850_dma1_rsv_chans,
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.rsv_slots = da850_dma1_rsv_slots,
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};
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static struct edma_rsv_info *da850_edma_rsv[2] = {
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&da850_edma_cc0_rsv,
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&da850_edma_cc1_rsv,
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};
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static const short hawk_mmcsd0_pins[] = {
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DA850_MMCSD0_DAT_0, DA850_MMCSD0_DAT_1, DA850_MMCSD0_DAT_2,
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DA850_MMCSD0_DAT_3, DA850_MMCSD0_CLK, DA850_MMCSD0_CMD,
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DA850_GPIO3_12, DA850_GPIO3_13,
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-1
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};
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static int da850_hawk_mmc_get_ro(int index)
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{
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return gpio_get_value(DA850_HAWK_MMCSD_WP_PIN);
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}
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static int da850_hawk_mmc_get_cd(int index)
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{
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return !gpio_get_value(DA850_HAWK_MMCSD_CD_PIN);
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}
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static struct davinci_mmc_config da850_mmc_config = {
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.get_ro = da850_hawk_mmc_get_ro,
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.get_cd = da850_hawk_mmc_get_cd,
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.wires = 4,
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.max_freq = 50000000,
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.caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
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.version = MMC_CTLR_VERSION_2,
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};
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static __init void omapl138_hawk_mmc_init(void)
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{
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int ret;
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ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
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if (ret) {
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pr_warning("%s: MMC/SD0 mux setup failed: %d\n",
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__func__, ret);
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return;
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}
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ret = gpio_request_one(DA850_HAWK_MMCSD_CD_PIN,
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GPIOF_DIR_IN, "MMC CD");
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if (ret < 0) {
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pr_warning("%s: can not open GPIO %d\n",
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__func__, DA850_HAWK_MMCSD_CD_PIN);
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return;
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}
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ret = gpio_request_one(DA850_HAWK_MMCSD_WP_PIN,
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GPIOF_DIR_IN, "MMC WP");
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if (ret < 0) {
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pr_warning("%s: can not open GPIO %d\n",
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__func__, DA850_HAWK_MMCSD_WP_PIN);
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goto mmc_setup_wp_fail;
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}
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ret = da8xx_register_mmcsd0(&da850_mmc_config);
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if (ret) {
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pr_warning("%s: MMC/SD0 registration failed: %d\n",
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__func__, ret);
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goto mmc_setup_mmcsd_fail;
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}
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return;
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mmc_setup_mmcsd_fail:
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gpio_free(DA850_HAWK_MMCSD_WP_PIN);
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mmc_setup_wp_fail:
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gpio_free(DA850_HAWK_MMCSD_CD_PIN);
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}
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static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
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static da8xx_ocic_handler_t hawk_usb_ocic_handler;
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static const short da850_hawk_usb11_pins[] = {
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DA850_GPIO2_4, DA850_GPIO6_13,
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-1
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};
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static int hawk_usb_set_power(unsigned port, int on)
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{
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gpio_set_value(DA850_USB1_VBUS_PIN, on);
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return 0;
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}
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static int hawk_usb_get_power(unsigned port)
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{
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return gpio_get_value(DA850_USB1_VBUS_PIN);
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}
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static int hawk_usb_get_oci(unsigned port)
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{
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return !gpio_get_value(DA850_USB1_OC_PIN);
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}
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static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
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{
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int irq = gpio_to_irq(DA850_USB1_OC_PIN);
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int error = 0;
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if (handler != NULL) {
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hawk_usb_ocic_handler = handler;
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error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
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IRQF_DISABLED | IRQF_TRIGGER_RISING |
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IRQF_TRIGGER_FALLING,
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"OHCI over-current indicator", NULL);
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if (error)
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pr_err("%s: could not request IRQ to watch "
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"over-current indicator changes\n", __func__);
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} else {
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free_irq(irq, NULL);
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}
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return error;
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}
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static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
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.set_power = hawk_usb_set_power,
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.get_power = hawk_usb_get_power,
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.get_oci = hawk_usb_get_oci,
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.ocic_notify = hawk_usb_ocic_notify,
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/* TPS2087 switch @ 5V */
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.potpgt = (3 + 1) / 2, /* 3 ms max */
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};
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static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
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{
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hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
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return IRQ_HANDLED;
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}
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static __init void omapl138_hawk_usb_init(void)
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{
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int ret;
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u32 cfgchip2;
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ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
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if (ret) {
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pr_warning("%s: USB 1.1 PinMux setup failed: %d\n",
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__func__, ret);
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return;
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}
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/* Setup the Ref. clock frequency for the HAWK at 24 MHz. */
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cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
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cfgchip2 &= ~CFGCHIP2_REFFREQ;
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cfgchip2 |= CFGCHIP2_REFFREQ_24MHZ;
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__raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
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ret = gpio_request_one(DA850_USB1_VBUS_PIN,
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GPIOF_DIR_OUT, "USB1 VBUS");
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if (ret < 0) {
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pr_err("%s: failed to request GPIO for USB 1.1 port "
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"power control: %d\n", __func__, ret);
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return;
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}
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ret = gpio_request_one(DA850_USB1_OC_PIN,
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GPIOF_DIR_IN, "USB1 OC");
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if (ret < 0) {
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pr_err("%s: failed to request GPIO for USB 1.1 port "
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"over-current indicator: %d\n", __func__, ret);
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goto usb11_setup_oc_fail;
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}
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ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
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if (ret) {
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pr_warning("%s: USB 1.1 registration failed: %d\n",
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__func__, ret);
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goto usb11_setup_fail;
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}
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return;
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usb11_setup_fail:
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gpio_free(DA850_USB1_OC_PIN);
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usb11_setup_oc_fail:
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gpio_free(DA850_USB1_VBUS_PIN);
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}
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static struct davinci_uart_config omapl138_hawk_uart_config __initdata = {
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.enabled_uarts = 0x7,
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};
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static __init void omapl138_hawk_init(void)
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{
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int ret;
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davinci_serial_init(&omapl138_hawk_uart_config);
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omapl138_hawk_config_emac();
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ret = da850_register_edma(da850_edma_rsv);
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if (ret)
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pr_warning("%s: EDMA registration failed: %d\n",
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__func__, ret);
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omapl138_hawk_mmc_init();
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omapl138_hawk_usb_init();
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ret = da8xx_register_watchdog();
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if (ret)
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pr_warning("omapl138_hawk_init: "
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"watchdog registration failed: %d\n",
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ret);
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}
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#ifdef CONFIG_SERIAL_8250_CONSOLE
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static int __init omapl138_hawk_console_init(void)
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{
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if (!machine_is_omapl138_hawkboard())
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return 0;
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return add_preferred_console("ttyS", 2, "115200");
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}
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console_initcall(omapl138_hawk_console_init);
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#endif
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static void __init omapl138_hawk_map_io(void)
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{
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da850_init();
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}
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MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
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.boot_params = (DA8XX_DDR_BASE + 0x100),
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.map_io = omapl138_hawk_map_io,
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.init_irq = cp_intc_init,
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.timer = &davinci_timer,
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.init_machine = omapl138_hawk_init,
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.dma_zone_size = SZ_128M,
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MACHINE_END
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